1. A control method for heating a power battery is applied to a Battery Management System (BMS), and comprises the following steps:

acquiring the temperature of a single battery cell of the power battery of the electric automobile;

if the temperature of the single battery cell is higher than a first preset temperature threshold and lower than a second preset temperature threshold, sending prompt information that the power battery needs to be heated and insulated and option information for heating and insulating the power battery to an instrument of the electric vehicle;

and according to the option information, heating and heat preservation control is carried out on the power battery.

2. The control method for heating the power battery according to claim 1, wherein the option information comprises: a first option to agree to a heat soak and a second option to disagree with a heat soak.

3. The method for controlling the heating of the power battery according to claim 2, wherein the step of controlling the heating and the heat preservation of the power battery according to the option information comprises:

detecting the charging state of the power battery;

and according to the charging state of the power battery and the selected first option or second option, carrying out heating and heat preservation control on the power battery.

4. The method for controlling the heating of the power battery according to claim 3, wherein the step of controlling the heating and heat preservation of the power battery according to the charging state of the power battery and the selected first option or second option comprises the following steps:

if the power battery is in a slow charging state and the first option is selected, sending a first control instruction for heating and insulating the power battery to a charger, so that the charger outputs electric quantity according to the first control instruction or utilizes the electric quantity of the power battery to heat and insulate the power battery; alternatively, the first and second electrodes may be,

if the power battery is in a slow charging state and the second option is selected, sending a second control instruction for prohibiting the power battery from being heated and insulated to a charger, so that the charger directly charges the power battery according to the second control instruction and does not heat and insulate the power battery; alternatively, the first and second electrodes may be,

if the power battery is in a quick charging state and the first option is selected, sending a third control instruction for heating and insulating the power battery to a charger, so that the charger outputs electric quantity according to the third control instruction or utilizes the electric quantity of the power battery to heat and insulate the power battery; alternatively, the first and second electrodes may be,

if the power battery is in a quick charging state and the second option is selected, sending a fourth control instruction for prohibiting the power battery from being heated and insulated to a charger, so that the charger directly charges the power battery according to the fourth control instruction and does not heat and insulate the power battery.

5. The method for controlling the heating of the power battery according to claim 2, wherein the controlling the heating and the heat preservation of the power battery according to the heating option information comprises:

detecting the driving state of the electric automobile;

and according to the driving state and the selected first option or second option, carrying out heating and heat preservation control on the power battery.

6. The method for controlling the heating of the power battery according to claim 5, wherein the step of performing the heating and heat preservation control on the power battery according to the driving state and the selected first option or second option comprises:

if the electric vehicle is in a driving state, the first option is selected, and the electric quantity of the power battery is greater than a preset value, controlling the power battery to output the electric quantity to heat and preserve the temperature of the power battery; alternatively, the first and second electrodes may be,

if the electric automobile is in a driving state and the second option is selected, the power battery is controlled to output electric quantity to driving parts of the electric automobile, and the power battery is not heated and kept warm.

7. A control device for heating a power battery is applied to a Battery Management System (BMS), and the device comprises:

the acquisition module is used for acquiring the temperature of a single battery cell of the power battery of the electric automobile;

the processing module is used for judging whether the temperature of the single battery cell is higher than a first preset temperature threshold value and lower than a second preset temperature threshold value or not, and sending prompt information that the power battery needs to be heated and insulated and option information for heating and insulating the power battery to an instrument of the electric automobile;

and the control module is used for carrying out heating and heat preservation control on the power battery according to the option information.

8. The control device for heating a power battery according to claim 7, wherein the option information comprises: a first option to agree to a heat soak and a second option to disagree with a heat soak.

9. The power cell heating control device of claim 8, wherein the control module comprises:

the first detection unit is used for detecting the charging state of the power battery;

and the first control unit is used for carrying out heating and heat preservation control on the power battery according to the charging state of the power battery and the selected first option or second option.

10. The control device for heating a power battery according to claim 9, wherein the first control unit is specifically configured to:

if the power battery is in a slow charging state and the first option is selected, sending a first control instruction for heating and insulating the power battery to a charger, so that the charger outputs electric quantity according to the first control instruction or utilizes the electric quantity of the power battery to heat and insulate the power battery; alternatively, the first and second electrodes may be,

if the power battery is in a slow charging state and the second option is selected, sending a second control instruction for prohibiting the power battery from being heated and insulated to a charger, so that the charger directly charges the power battery according to the second control instruction and does not heat and insulate the power battery; alternatively, the first and second electrodes may be,

if the power battery is in a quick charging state and the first option is selected, sending a third control instruction for heating and insulating the power battery to a charger, so that the charger outputs electric quantity according to the third control instruction or utilizes the electric quantity of the power battery to heat and insulate the power battery; alternatively, the first and second electrodes may be,

if the power battery is in a quick charging state and the second option is selected, sending a fourth control instruction for prohibiting the power battery from being heated and insulated to a charger, so that the charger directly charges the power battery according to the fourth control instruction and does not heat and insulate the power battery.

11. The power cell heating control device of claim 8, wherein the control module comprises:

the second detection unit is used for detecting the driving state of the electric automobile;

and the second control unit is used for carrying out heating and heat preservation control on the power battery according to the driving state and the selected first option or second option.

12. The power battery heating control device according to claim 11, wherein the second control unit is specifically configured to:

if the electric vehicle is in a driving state, the first option is selected, and the electric quantity of the power battery is greater than a preset value, controlling the power battery to output the electric quantity to heat and preserve the temperature of the power battery; alternatively, the first and second electrodes may be,

if the electric automobile is in a driving state and the second option is selected, the power battery is controlled to output electric quantity to driving parts of the electric automobile, and the power battery is not heated and kept warm.

13. An automobile comprising a battery management system BMS, a power battery and a meter, characterized in that said BMS comprises a control device for power battery heating according to any of the claims 7 to 12.

Background

Along with the rapid development of the electric vehicle thermal management system technology, in the driving or charging process of an electric vehicle, when the temperature of a single battery core of a power storage battery is lower than a certain set temperature threshold value, the power storage battery management system can automatically send a power battery heat preservation heating instruction to heat or preserve heat for the power storage battery. However, when the electric vehicle is running or charging, when the lowest temperature of the single battery cell of the power storage battery is lower than a certain set temperature threshold, if the user mainly aims at storing the power storage capacity of the vehicle power storage battery or supplying power to electrical appliances, and does not plan to use part of the electric quantity for heat preservation and heating of the power storage battery, the power storage battery management system automatically sends a heat preservation and heating instruction of the power storage battery when the temperature of the single battery cell is lower than the certain set temperature threshold, and the function of automatically heating or preserving the heat of the power storage battery is violated with the subjective will of the user, so that the man-machine interaction is poor. The problem that a vehicle user has a long charging time during low-temperature charging or has a short driving distance during low-temperature driving is complained a lot, so that the use of the vehicle by the user is influenced, and the popularization and the application of the electric vehicle are not facilitated.

Disclosure of Invention

The invention provides a control method and device for heating a power battery and an automobile, and aims to solve the technical problem that human-computer interaction experience is poor when the power battery is heated in a heat preservation mode.

In order to solve the technical problems, the technical scheme of the invention is as follows:

a control method for heating a power battery is applied to a Battery Management System (BMS), and comprises the following steps:

acquiring the temperature of a single battery cell of the power battery of the electric automobile;

if the temperature of the single battery cell is higher than a first preset temperature threshold and lower than a second preset temperature threshold, sending prompt information that the power battery needs to be heated and insulated and option information for heating and insulating the power battery to an instrument of the electric vehicle;

and according to the option information, heating and heat preservation control is carried out on the power battery.

Further, the option information includes: a first option to agree to a heat soak and a second option to disagree with a heat soak.

Further, according to the option information, the heating and heat preservation control of the power battery comprises:

detecting the charging state of the power battery;

and according to the charging state of the power battery and the selected first option or second option, carrying out heating and heat preservation control on the power battery.

Further, according to the charging state of the power battery and the selected first option or second option, the method for controlling the heating and heat preservation of the power battery comprises the following steps:

if the power battery is in a slow charging state and the first option is selected, sending a first control instruction for heating and insulating the power battery to a charger, so that the charger outputs electric quantity according to the first control instruction or utilizes the electric quantity of the power battery to heat and insulate the power battery; alternatively, the first and second electrodes may be,

if the power battery is in a slow charging state and the second option is selected, sending a second control instruction for prohibiting the power battery from being heated and insulated to a charger, so that the charger directly charges the power battery according to the second control instruction and does not heat and insulate the power battery; alternatively, the first and second electrodes may be,

if the power battery is in a quick charging state and the first option is selected, sending a third control instruction for heating and insulating the power battery to a charger, so that the charger outputs electric quantity according to the third control instruction or utilizes the electric quantity of the power battery to heat and insulate the power battery; alternatively, the first and second electrodes may be,

if the power battery is in a quick charging state and the second option is selected, sending a fourth control instruction for prohibiting the power battery from being heated and insulated to a charger, so that the charger directly charges the power battery according to the fourth control instruction and does not heat and insulate the power battery.

Further, according to the heating option information, the heating and heat preservation control of the power battery comprises:

detecting the driving state of the electric automobile;

and according to the driving state and the selected first option or second option, carrying out heating and heat preservation control on the power battery.

Further, according to the driving state and the selected first option or second option, the heating and heat preservation control of the power battery comprises the following steps:

if the electric vehicle is in a driving state, the first option is selected, and the electric quantity of the power battery is greater than a preset value, controlling the power battery to output the electric quantity to heat and preserve the temperature of the power battery; alternatively, the first and second electrodes may be,

if the electric automobile is in a driving state and the second option is selected, the power battery is controlled to output electric quantity to driving parts of the electric automobile, and the power battery is not heated and kept warm.

A control device for heating a power battery is applied to a Battery Management System (BMS), and comprises:

the acquisition module is used for acquiring the temperature of a single battery cell of the power battery of the electric automobile;

the processing module is used for judging whether the temperature of the single battery cell is higher than a first preset temperature threshold value and lower than a second preset temperature threshold value or not, and sending prompt information that the power battery needs to be heated and insulated and option information for heating and insulating the power battery to an instrument of the electric automobile;

and the control module is used for carrying out heating and heat preservation control on the power battery according to the option information.

Further, the option information includes: a first option to agree to a heat soak and a second option to disagree with a heat soak.

Further, the control module includes:

the first detection unit is used for detecting the charging state of the power battery;

and the first control unit is used for carrying out heating and heat preservation control on the power battery according to the charging state of the power battery and the selected first option or second option.

Further, the first control unit is specifically configured to:

if the power battery is in a slow charging state and the first option is selected, sending a first control instruction for heating and insulating the power battery to a charger, so that the charger outputs electric quantity according to the first control instruction or utilizes the electric quantity of the power battery to heat and insulate the power battery; alternatively, the first and second electrodes may be,

if the power battery is in a slow charging state and the second option is selected, sending a second control instruction for prohibiting the power battery from being heated and insulated to a charger, so that the charger directly charges the power battery according to the second control instruction and does not heat and insulate the power battery; alternatively, the first and second electrodes may be,

if the power battery is in a quick charging state and the first option is selected, sending a third control instruction for heating and insulating the power battery to a charger, so that the charger outputs electric quantity according to the third control instruction or utilizes the electric quantity of the power battery to heat and insulate the power battery; alternatively, the first and second electrodes may be,

if the power battery is in a quick charging state and the second option is selected, sending a fourth control instruction for prohibiting the power battery from being heated and insulated to a charger, so that the charger directly charges the power battery according to the fourth control instruction and does not heat and insulate the power battery.

Further, the control module includes:

the second detection unit is used for detecting the driving state of the electric automobile;

and the second control unit is used for carrying out heating and heat preservation control on the power battery according to the driving state and the selected first option or second option.

Further, the second control unit is specifically configured to:

if the electric vehicle is in a driving state, the first option is selected, and the electric quantity of the power battery is greater than a preset value, controlling the power battery to output the electric quantity to heat and preserve the temperature of the power battery; alternatively, the first and second electrodes may be,

if the electric automobile is in a driving state and the second option is selected, the power battery is controlled to output electric quantity to driving parts of the electric automobile, and the power battery is not heated and kept warm.

An automobile comprising a battery management system BMS, a power battery and a meter, said BMS comprising a control of the heating of the power battery as defined in any one of the above.

The scheme of the invention at least comprises the following beneficial effects:

according to the scheme, when the temperature of the single battery cell of the power battery of the electric vehicle is higher than the first preset temperature threshold and lower than the second preset temperature threshold, the prompt message is sent to the vehicle user, and the power battery is subjected to heating and heat preservation control according to the option information of the user, so that the man-machine interaction experience of the heat management system of the electric vehicle is effectively improved, and the problems of long charging time and quick decline of the driving range during driving of the user in low-temperature charging are greatly solved.

Drawings

FIG. 1 is a step diagram of a method for controlling heating of a power cell in accordance with the present invention;

FIG. 2 is a device connection diagram of a control device for heating a power battery according to the present invention;

fig. 3 is a flow chart of a control method for heating a power battery according to the present invention.

Detailed Description

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

As shown in fig. 1, an embodiment of the present invention provides a method for controlling heating of a power battery, which is applied to a battery management system BMS, and the method includes:

step S1, obtaining the temperature of a single battery cell of the power battery of the electric automobile;

step S2, if the temperature of the single battery cell is higher than a first preset temperature threshold and lower than a second preset temperature threshold, sending prompt information that the power battery needs to be heated and insulated and option information for heating and insulating the power battery to an instrument of the electric automobile;

and step S3, according to the option information, heating and heat preservation control is carried out on the power battery.

According to the scheme, when the temperature of the single battery cell of the power battery of the electric vehicle is higher than the first preset temperature threshold and lower than the second preset temperature threshold, the prompt message is sent to the vehicle user, and the power battery is subjected to heating and heat preservation control according to the option information of the user, so that the man-machine interaction experience of the heat management system of the electric vehicle is effectively improved, and the problems of long charging time and quick decline of the driving range during driving of the user in low-temperature charging are greatly solved.

In specific implementation, the option information includes: a first option to agree to a heat soak and a second option to disagree with a heat soak. The purpose of setting up two options is in order to strengthen the interaction with the user to can decide whether to heat the power battery and keep warm according to user's option, improve man-machine interaction experience, the mode is simpler, easily realize.

When the specific implementation is carried out, according to the option information, the heating and heat preservation control is carried out on the power battery, and the method comprises the following steps: detecting the charging state of the power battery;

and according to the charging state of the power battery and the selected first option or second option, carrying out heating and heat preservation control on the power battery.

The charging state of the power battery has a slow charging state or a quick charging state, and the power battery is heated and insulated or not heated and insulated according to the charging state of the power battery, so that the accuracy of heating and insulating control of the power battery is improved.

When the method is specifically implemented, according to the charging state of the power battery and the selected first option or second option, the heating and heat preservation control is performed on the power battery, and the method comprises the following steps:

if the power battery is in a slow charging state and the first option is selected, sending a first control instruction for heating and insulating the power battery to a charger, so that the charger outputs electric quantity according to the first control instruction or utilizes the electric quantity of the power battery to heat and insulate the power battery; alternatively, the first and second electrodes may be,

if the power battery is in a slow charging state and the second option is selected, sending a second control instruction for prohibiting the power battery from being heated and insulated to a charger, so that the charger directly charges the power battery according to the second control instruction and does not heat and insulate the power battery; alternatively, the first and second electrodes may be,

if the power battery is in a quick charging state and the first option is selected, sending a third control instruction for heating and insulating the power battery to a charger, so that the charger outputs electric quantity according to the third control instruction or utilizes the electric quantity of the power battery to heat and insulate the power battery; alternatively, the first and second electrodes may be,

if the power battery is in a quick charging state and the second option is selected, sending a fourth control instruction for prohibiting the power battery from being heated and insulated to a charger, so that the charger directly charges the power battery according to the fourth control instruction and does not heat and insulate the power battery.

The charging states of the power batteries are listed, and the power batteries are heated and insulated in several control modes when the first option or the second option is selected, so that a user can select or customize the power batteries according to actual needs, and the applicability is improved.

When the specific implementation is carried out, according to the heating option information, the power battery is subjected to heating and heat preservation control, and the method comprises the following steps: detecting the driving state of the electric automobile;

and according to the driving state and the selected first option or second option, carrying out heating and heat preservation control on the power battery.

According to the driving state of the electric automobile and the selected first option or second option, the power battery is heated and insulated or not heated and insulated, so that driving safety is guaranteed, and reliability and safety of the method are improved.

When the method is specifically implemented, according to the driving state and the selected first option or second option, the power battery is subjected to heating and heat preservation control, and the method comprises the following steps:

if the electric vehicle is in a driving state, the first option is selected, and the electric quantity of the power battery is greater than a preset value, controlling the power battery to output the electric quantity to heat and preserve the temperature of the power battery; alternatively, the first and second electrodes may be,

if the electric automobile is in a driving state and the second option is selected, the power battery is controlled to output electric quantity to driving parts of the electric automobile, and the power battery is not heated and kept warm.

According to the control method and the control device for heating the power battery, disclosed by the embodiment of the invention, in the driving or charging process of an electric automobile, according to the characteristic of the power battery when the temperature is lower, when the temperature of a single battery cell of the power battery is lower than a set certain temperature threshold (for example, a certain automobile type is set to be-20 ℃), firstly, a power Battery Management System (BMS) sends a signal that the temperature of the single battery cell of the power battery is too low to an instrument, then the instrument displays that the temperature of the vehicle battery is low and part of electric quantity is required to be consumed for heat preservation and heating of the battery, so as to remind a user: the vehicle is heating the battery. When the temperature of the single battery core of the power storage battery is higher than a set certain temperature threshold (set to be-20 ℃ if a certain vehicle type) and lower than another set temperature threshold (set to be 0 ℃ if the certain vehicle type), the instrument can display that the temperature of the vehicle battery is lower, part of electric quantity is used for heat preservation and heating of the battery, and options of agreement and disagreement are popped up. If the user clicks the 'consent' option and the vehicle is in a slow charging or remote slow charging state, the power battery management system sends a power battery heat preservation heating instruction, and the electric quantity output by the charger or the electric quantity of the power battery is used for meeting the requirement of heat preservation heating of the power battery; if the user clicks the 'consent' option and the vehicle is in the quick charging state, the power battery management system sends a power battery heat preservation heating instruction, and the demand of heat preservation heating of the power battery is met by applying the electric quantity output by the quick charging pile or the electric quantity of the power battery; and if the user clicks the 'consent' option and the vehicle is in a driving state, the power battery management system sends a power battery heat preservation heating instruction when the electric quantity of the power battery is met, and the electric quantity of the power battery is used for meeting the requirement of heat preservation heating of the power battery. If the user clicks the 'disagreement' option and the vehicle is in a slow charging state, the power battery management system prohibits sending a power battery heat preservation heating instruction, and the electric quantity output by the charger directly charges the power battery; if the user clicks the 'disagreement' option and the vehicle is in a quick charging state, the power battery management system prohibits sending a power battery heat preservation heating instruction, and the electric quantity output by the quick charging pile directly charges the power battery; and if the user clicks the 'disagreement' option and the vehicle is in a driving state, the power battery management system prohibits sending a power battery heat preservation heating instruction, and the electric quantity output by the power battery directly supplies power to the vehicle electric device.

The invention can effectively solve the problem that the human-computer interaction of the vehicle thermal management system is poor, whether the power battery is heated or not can be autonomously determined according to the current vehicle use of a user, and the complaint of the user on longer charging time in low-temperature charging or shorter driving distance in low-temperature driving can be caused; the man-machine interaction of the vehicle with respect to the thermal management system is improved, and the better use of the electric vehicle by a client is facilitated.

Referring to fig. 2, a working flow of the control method for heating the power battery according to the embodiment of the present invention is as follows:

when the electric automobile is in an ON gear state or a charging state, the BMS detects the temperature of the single battery cell of the power storage battery and judges whether the lowest temperature of the single battery cell is lower than a set certain temperature threshold value (for example, -20 ℃ set by a certain vehicle type). When the BMS detects that the lowest temperature of the monomer battery core of the power storage battery is lower than a set certain temperature threshold value (for example, -20 ℃ set by a certain vehicle model), the BMS sends the information that the temperature of the monomer battery core is low to the ICM. The ICM control instrument displays that "the vehicle battery temperature is low, and part of the electric quantity needs to be consumed for battery heat preservation and heating" to remind the user that the vehicle is heating the battery. And when the cell temperature of the single power storage battery is higher than a certain set temperature threshold (such as-20 ℃ set by a certain vehicle model) and lower than another set temperature threshold (such as 0 ℃ set by a certain vehicle model), the BMS sends the information that the cell temperature of the single power storage battery is low to the ICM. After the ICM receives the signal that the temperature of the power storage battery is low, the instrument displays the information that whether the temperature of the vehicle battery is low and part of electric quantity is consumed for heat preservation and heating of the battery or not to remind a user, and pop up options of 'agreeing' and 'disagreeing'. If the user clicks the 'agree' option, the BMS sends a power battery heat preservation heating instruction, and part of electric quantity consumed is used for heat preservation heating of the power battery; if the user clicks the 'disagreement' option, the BMS does not send a power battery heat preservation heating instruction, and the vehicle does not heat the power battery. When the user clicks the 'consent' option and consumes partial electric quantity to heat the power battery, the temperature of the single battery core gradually rises until the temperature of the power battery core reaches the threshold for quitting the heat preservation and heating of the battery, and the vehicle quits the heat preservation and heating of the power battery.

The BMS is used for sending the information of low power battery temperature to the ICM, then the instrument displays the information of low vehicle battery temperature and whether partial electric quantity is consumed for battery heat preservation and heating to remind a user, the option of agreement and disagreement is popped up, and finally the user selects the option of agreement and disagreement according to the current use of the vehicle to determine whether partial electric quantity is consumed for heat preservation and heating of the power battery, so that the control of the automobile user on the heat preservation and heating of the power battery is greatly improved, the human-computer interaction experience is improved, and the popularization and the use of the electric automobile are facilitated.

As shown in fig. 3, an embodiment of the present invention provides a control device for heating a power battery, which is applied to a battery management system BMS, and the control device comprises:

the acquisition module is used for acquiring the temperature of a single battery cell of the power battery of the electric automobile;

the processing module is used for judging whether the temperature of the single battery cell is higher than a first preset temperature threshold value and lower than a second preset temperature threshold value or not, and sending prompt information that the power battery needs to be heated and insulated and option information for heating and insulating the power battery to an instrument of the electric automobile;

and the control module is used for carrying out heating and heat preservation control on the power battery according to the option information.

According to the scheme, when the temperature of the single battery cell of the power battery of the electric vehicle is higher than the first preset temperature threshold and lower than the second preset temperature threshold, the prompt message is sent to the vehicle user, and the power battery is subjected to heating and heat preservation control according to the option information of the user, so that the man-machine interaction experience of the heat management system of the electric vehicle is effectively improved, and the problems of long charging time and quick decline of the driving range during driving of the user in low-temperature charging are greatly solved.

In specific implementation, the option information includes: a first option to agree to a heat soak and a second option to disagree with a heat soak. The purpose of setting up two options is in order to strengthen the interaction with the user to can decide whether to heat the power battery and keep warm according to user's option, improve man-machine interaction experience, the mode is simpler, easily realize.

As shown in fig. 3, in a specific implementation, the control module includes:

the first detection unit is used for detecting the charging state of the power battery;

and the first control unit is used for carrying out heating and heat preservation control on the power battery according to the charging state of the power battery and the selected first option or second option.

The charging state of the power battery has a slow charging state or a quick charging state, and the power battery is heated and insulated or not heated and insulated according to the charging state of the power battery, so that the accuracy of heating and insulating control of the power battery is improved.

In a specific implementation, the first control unit is specifically configured to:

if the power battery is in a slow charging state and the first option is selected, sending a first control instruction for heating and insulating the power battery to a charger, so that the charger outputs electric quantity according to the first control instruction or utilizes the electric quantity of the power battery to heat and insulate the power battery; alternatively, the first and second electrodes may be,

if the power battery is in a slow charging state and the second option is selected, sending a second control instruction for prohibiting the power battery from being heated and insulated to a charger, so that the charger directly charges the power battery according to the second control instruction and does not heat and insulate the power battery; alternatively, the first and second electrodes may be,

if the power battery is in a quick charging state and the first option is selected, sending a third control instruction for heating and insulating the power battery to a charger, so that the charger outputs electric quantity according to the third control instruction or utilizes the electric quantity of the power battery to heat and insulate the power battery; alternatively, the first and second electrodes may be,

if the power battery is in a quick charging state and the second option is selected, sending a fourth control instruction for prohibiting the power battery from being heated and insulated to a charger, so that the charger directly charges the power battery according to the fourth control instruction and does not heat and insulate the power battery.

The charging states of the power batteries are listed, and the power batteries are heated and insulated in several control modes when the first option or the second option is selected, so that a user can select or customize the power batteries according to actual needs, and the applicability is improved.

As shown in fig. 3, in a specific implementation, the control module includes:

the second detection unit is used for detecting the driving state of the electric automobile;

and the second control unit is used for carrying out heating and heat preservation control on the power battery according to the driving state and the selected first option or second option.

According to the driving state of the electric automobile and the selected first option or second option, the power battery is heated and insulated or not heated and insulated, so that driving safety is guaranteed, and reliability and safety of the method are improved.

In a specific implementation, the second control unit is specifically configured to:

if the electric vehicle is in a driving state, the first option is selected, and the electric quantity of the power battery is greater than a preset value, controlling the power battery to output the electric quantity to heat and preserve the temperature of the power battery; alternatively, the first and second electrodes may be,

if the electric automobile is in a driving state and the second option is selected, the power battery is controlled to output electric quantity to driving parts of the electric automobile, and the power battery is not heated and kept warm.

An embodiment of the present invention provides an automobile, which includes a battery management system BMS, a power battery, and a meter, wherein the BMS includes a control device for heating the power battery according to any one of the above embodiments.

While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.