1. A high-voltage interlocking detection method for a controller is characterized in that,

detecting whether light exists in the controller (1);

when light is detected in the controller (1), the controller (1) is judged to be in a state of being disconnected from external high voltage; when no light is detected in the controller (1), judging that the controller (1) is in a state of being connected with external high voltage;

when the controller (1) is in a disconnection state or a connection state with the external high voltage, a corresponding state signal is generated to perform high voltage interlocking.

2. The method for detecting the high-voltage interlock of the controller according to claim 1, wherein the controller (1) is detected whether light is transmitted through a through hole of the high-voltage connector socket (5).

3. The controller high-voltage interlock detection method according to claim 1, characterized in that whether light exists inside the controller (1) is detected through the photosensitive element (2).

4. The controller high voltage interlock detection method according to claim 1, 2 or 3, characterized in that the photosensitive element (2) is a photo resistor.

5. The utility model provides a controller high pressure interlock detection device, its characterized in that, includes photosensitive element (2) and the control unit, photosensitive element (2) with the control unit links to each other, photosensitive element (2) are used for detecting whether there is light controller (1) inside to send the signal of telecommunication to the control unit, the control unit judges controller (1) according to the signal of telecommunication and is in with outside high pressure connected state or with outside high pressure disconnection state, and produce corresponding status signal in order to carry out the high pressure interlock.

6. The controller high-voltage interlock detection device according to claim 5, further comprising a collection circuit (3) and a signal processing circuit (4), wherein an input end of the collection circuit (3) is connected with the photosensitive element (2), and an output end of the collection circuit (3) is connected with the signal processing circuit (4); the acquisition circuit (3) is used for acquiring an output signal of the photosensitive element (2); the signal processing circuit (4) is used for processing the signals collected by the collecting circuit (3) to generate state signals for sending out.

7. The controller high-voltage interlock detection device according to claim 6, wherein the photosensitive element (2), the acquisition circuit (3) and the signal processing circuit (4) are all installed inside the controller (1).

8. The controller high voltage interlock detection device according to claim 5, 6 or 7, wherein the status signal is sent out as a CAN signal or a hardware signal.

9. The controller high voltage interlock detection device according to claim 5, 6 or 7, wherein the light sensing element (2) is a photo resistor.

10. A controller comprising a housing, the housing being provided with a high voltage connector socket (5) corresponding to a high voltage connector plug (6), the housing being in a closed state when the high voltage connector plug (6) is inserted into the high voltage connector socket (5), characterized in that the housing is provided with a controller high voltage interlock detection device as claimed in any one of claims 5 to 9.

Background

With the application of new energy vehicles, high-voltage controllers, high-voltage power distribution, high-voltage air conditioner controllers and the like are more and more widely applied, and corresponding protection strategies need to be made when people contact or approach high-voltage lines and other dangers to protect the life safety of passengers and maintenance personnel. The high-voltage interlocking is a measure for ensuring that the controller can take relevant measures such as disconnecting high-voltage electricity and the like under the conditions of disconnecting a high-voltage wire of the high-voltage controller and the like, and ensuring the safety of people.

The currently relevant patent applications are:

1) title: high-pressure interlocking device (application number: CN201910251784.8)

The invention discloses a high-voltage interlocking device which comprises a high-voltage interlocking signal detecting and sending module, wherein in the high-voltage interlocking signal detecting and sending module, an electric signal is converted into an optical signal by adopting a light-emitting tube to be sent, and the returned optical signal is converted into the electric signal by adopting a photoelectric converter through the transmission of a high-voltage interlocking optical fiber. By adopting the technical scheme, the optical signal is more stable, the transmission of the optical signal is not easily subjected to electromagnetic interference, the optical signal is used for replacing an electric signal to carry out interconnection outside a module with a complex environment, and then the electric signal generated by the photoelectric coupling circuit is adopted for detection inside the detection module, so that the process is more accurate; after photoelectric coupling, the strength of the electric signal is detected, the sealing grade of the whole loop can be judged, and the sealing performance of the whole system can be further judged; a simple optical signal can be used as the interlock signal and the interlock signal generation and detection circuitry is no longer complex. However, in this scheme, a circuit is designed in the device to convert the electrical signal into the optical signal, and an external high-voltage interlocking optical fiber is also required to convert the electrical signal into the optical signal, so that the equipment and installation are complex.

2) Title: high voltage detection circuit and high voltage connection circuit (application number: CN201910594647.4)

The invention discloses a high-voltage detection circuit and a high-voltage connection circuit, wherein the high-voltage detection circuit comprises an interlocking detection circuit and a power supply circuit, the interlocking detection circuit comprises a first indicating device, the first end of the first indicating device is connected with the first end of a loop of a high-voltage connector, the second end of the first indicating device is connected with the first output end of the power supply circuit, and the second end of the loop is grounded so as to form a loop by the first indicating device and the loop. The high-voltage detection circuit provided by the invention can directly judge whether the high-voltage connector fails according to the working state indication of the first indicating device, and can directly and quickly locate the failure point in a network comprising a plurality of high-voltage connectors, thereby greatly reducing the maintenance difficulty and facilitating the timely troubleshooting. However, the method mainly places the interlocking circuit outside, and the wiring is complex and is more easily affected by the use environment and the like.

3) Title: high-voltage interlocking loop of electric automobile (application number: CN201910029425.8)

The invention discloses an electric automobile high-voltage interlocking loop, which comprises a main high-voltage interlocking loop and an air conditioner high-voltage interlocking loop, wherein the air conditioner high-voltage interlocking loop is connected with the high-voltage interlocking loop through a CAN bus; the main high-voltage interlocking loop is provided with a main high-voltage interlocking switch, an air conditioner high-voltage interlocking switch and a first maintenance interlocking switch which are connected in series; and an air conditioner electric compressor interlocking switch, an air conditioner PTC heater interlocking switch and a second maintenance interlocking switch which are mutually connected in series are arranged on the air conditioner high-voltage interlocking loop. However, the invention still needs to detect the interlocking loop through hard wire connection, and simultaneously adds a hardware switch, so that the design is relatively complex, especially the routing under the high-voltage environment is complex, and the EMC interference is large.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: aiming at the technical problems in the prior art, the invention provides the method, the device and the controller for detecting the high-voltage interlocking of the controller, which have the advantages of reliable detection, low cost and simple and convenient operation.

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

a method for detecting high-voltage interlock of a controller,

detecting whether light exists in the controller;

when light rays are detected in the controller, the controller is judged to be in a state of being disconnected from external high voltage; when no light is detected in the controller, judging that the controller is in a state of being connected with external high voltage;

when the controller is in a disconnection state or a connection state with the external high voltage, a corresponding state signal is generated to perform high voltage interlocking.

As a further improvement of the above technical solution:

whether light rays transmitted through the through hole in the high-voltage connector socket exist in the controller or not is detected.

Whether light exists in the controller or not is detected through the photosensitive element.

The photosensitive element is a photoresistor.

The invention also discloses a controller high-voltage interlocking detection device which comprises a photosensitive element and a control unit, wherein the photosensitive element is connected with the control unit and used for detecting whether light exists in the controller or not and sending an electric signal to the control unit, and the control unit judges whether the controller is in a state of being connected with external high voltage or in a state of being disconnected with the external high voltage according to the electric signal and generates a corresponding state signal to carry out high-voltage interlocking.

As a further improvement of the above technical solution:

the photosensitive element is connected with the photosensitive element through a connection line, and the photosensitive element is connected with the photosensitive element through a connection line; the acquisition circuit is used for acquiring the output signal of the photosensitive element; the signal processing circuit is used for processing the signals acquired by the acquisition circuit so as to generate state signals for outgoing.

The photosensitive element, the acquisition circuit and the signal processing circuit are all arranged in the controller.

The state signal is sent out by a CAN signal or a hardware signal.

The photosensitive element is a photoresistor.

The invention further discloses a controller which comprises a shell, wherein a high-voltage connector socket corresponding to the high-voltage connector plug is arranged on the shell, the shell is in a closed state when the high-voltage connector plug is inserted into the high-voltage connector socket, and the controller high-voltage interlocking detection device is arranged in the shell.

Compared with the prior art, the invention has the advantages that:

the method and the device for detecting the high-voltage interlocking of the controller judge whether the high-voltage connector is connected or not by detecting the optical signal, can avoid the problem that the electrical signal is easily interfered by a high-voltage magnetic field due to the stability of the optical signal, have reliable signal quality, can stably and effectively realize the detection of the state of the high-voltage connector, and are suitable for being used under the conditions of a high-voltage electrical system, a complex environment and the like.

The high-voltage interlocking detection device of the controller judges whether the high-voltage interlocking connector is connected or not by detecting the optical signal by using the photosensitive element, so that the physical wiring and routing inside and outside the controller are omitted, the design difficulty is reduced, and the internal structure and the electrical design of the product are simplified; in addition, the requirement of the high-voltage connector is reduced, the requirement on the connector is low (for example, elements such as a contact for detecting whether to be connected and the like do not need to be configured), and the cost performance is high; the photosensitive element can adopt elements such as a photoresistor and the like, and the cost is low.

Drawings

FIG. 1 is a flow chart of an embodiment of the method of the present invention.

Fig. 2 is a diagram of an embodiment of the detection device of the present invention in a specific application (in a state of connection with an external high voltage).

Fig. 3 is a diagram of an embodiment of the detection device of the present invention in a specific application (in a state of disconnection from an external high voltage).

The reference numbers in the figures denote: 1. a controller; 2. a photosensitive element; 3. an acquisition circuit; 4. a signal processing circuit; 5. a high voltage connector socket; 6. a high voltage connector plug.

Detailed Description

The invention is further described below with reference to the figures and the specific embodiments of the description.

As shown in fig. 1 to fig. 3, the high-voltage interlock detection method of the present embodiment is applied to high-voltage accessories such as a high-voltage controller, a high-voltage distribution controller, an air conditioner controller, and the like in a new energy vehicle, wherein each controller 1 is sealed when the high-voltage connector is in a connected state, and has no light inside, and when the high-voltage connector is in a disconnected state, light penetrates into the controller 1 through the high-voltage connector socket 5, and detection of the connection state with an external high voltage can be achieved by detecting light inside the controller 1, and the specific method adopted is as follows: detecting whether light exists in the controller 1; when light rays are detected in the controller 1, the controller 1 is judged to be in a state of being disconnected from external high voltage; when no light is detected in the controller 1, judging that the controller 1 is in a state of being connected with external high voltage; when the controller 1 is in a state of being disconnected from or connected with external high voltage, a corresponding state signal is generated and transmitted to a high voltage control unit inside or outside the controller, and the external high voltage is connected or disconnected, so that operations such as high-voltage interlocking and the like are realized, and the personal safety of maintenance personnel is guaranteed.

The high-voltage interlocking detection method for the controller judges whether the high-voltage connector is connected or not by detecting the optical signal, can avoid the problem that the electrical signal is easily interfered by a high-voltage magnetic field due to the stability of the optical signal, has reliable signal quality, can stably and effectively realize the detection of the state of the high-voltage connector, and is suitable for being used under the conditions of a high-voltage electrical system, a complex environment and the like.

In this embodiment, the light sensing element 2 is used to detect whether light exists inside the controller 1; the photosensitive element 2 can adopt devices or elements such as a photoresistor for light detection or light induction, and the cost is low.

The invention also discloses a controller high-voltage interlocking detection device, which comprises a photosensitive element 2 and a control unit (a control chip in the controller 1 can be adopted), wherein the photosensitive element 2 is connected with the control unit in or outside the controller, the photosensitive element 2 is used for detecting whether light exists in the controller 1 and sending an electric signal to the control unit, the control unit judges that the controller 1 is in a state of being connected with external high voltage or in a state of being disconnected with the external high voltage according to the electric signal, generates a corresponding state signal and transmits the state signal to the high-voltage control unit in or outside the controller, and the external high voltage is connected or disconnected, so that high-voltage interlocking and other operations are realized.

The high-voltage interlocking detection device of the controller judges whether the high-voltage connector is connected or not by detecting the optical signal by the photosensitive element 2, so that physical wiring and routing inside and outside the controller 1 are omitted, the design difficulty is reduced, and the internal structure and the electrical design of the product are simplified; in addition, the requirement of the high-voltage connector is reduced, the requirement on the connector is low (for example, elements such as a contact for detecting whether to be connected and the like do not need to be configured), and the cost performance is high; the photosensitive element 2 can adopt devices or elements such as a photoresistor for light detection or light induction, and the cost is low.

As shown in fig. 2 and fig. 3, in this embodiment, the image processing apparatus further includes an acquisition circuit 3 and a signal processing circuit 4, the photosensitive element 2, the acquisition circuit 3, and the signal processing circuit 4 are all installed inside the controller 1, no external wiring is required, an input end of the acquisition circuit 3 is connected to the photosensitive element 2, and an output end of the acquisition circuit 3 is connected to the signal processing circuit 4; the acquisition circuit 3 is used for acquiring the output signal of the photosensitive element 2; the signal processing circuit 4 is used for processing the signals collected by the collecting circuit 3 to generate state signals to be sent out by CAN signals or hardware signals or other types of signals.

The detection principle is as follows:

under the normal condition, high voltage connector plug 6 CAN be to inserting together with high voltage connector socket 5, controller 1 is when having high voltage connector plug 6 to connect, and inside does not have light, and photo resistance CAN gather the light, handles light signal through acquisition circuit 3, then sends other systems outward through signal processing circuit 4, CAN pass through CAN signal hardware signal or other types of signal and pass out, realizes the control of current high voltage connector plug 6 connection status.

When the high-voltage connector plug 6 is not connected with the high-voltage connector socket 5, due to the fact that the high-voltage connector socket 5 is provided with the through hole, external light CAN irradiate the photosensitive devices such as the photosensitive resistor through the through hole, the photosensitive resistor CAN collect the light, the light signals are processed through the collecting circuit 3 and then sent to other systems through the signal processing circuit 4, the signals are transmitted out through CAN signals/hardware signals or other types of signals, and the monitoring of the current disconnection state of the high-voltage connector plug 6 is achieved.

The invention also discloses a controller 1 which comprises a shell, wherein the shell is provided with a high-voltage connector socket 5 corresponding to the high-voltage connector plug 6, the shell is in a closed state when the high-voltage connector plug 6 is inserted into the high-voltage connector socket 5, and the shell is internally provided with the controller high-voltage interlocking detection device. When the high-voltage connector is normally operated by a person, light rays are all arranged outside the controller 1, whether the light rays exist is detected through a photoresistor and the like in the controller 1, and then the connection state of the high-voltage connector is judged; whether the high-voltage interlocking connector is connected or not is detected by using the optical signal, a traditional method of connecting and detecting through a hard-wire connector is replaced, the connection state of the high-voltage connector is judged by software of the controller 1 through detecting the optical signal, and then the optical signal is fed back to the whole loop through CAN signals or hardware signals and the like, so that the cost is low and the reliability is high.

The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above-mentioned embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may be made by those skilled in the art without departing from the principle of the invention.