Detection device for communication control function of automobile power battery

Abstract

The utility model belongs to the technical field of automobile power batteries, and particularly relates to a detection device for a communication control function of an automobile power battery. The utility model relates to an automobile power battery communication control function detection device, which comprises a power battery, a connector, a wire harness, a communication module, a test computer and a 12V direct current power supply, the power battery is respectively connected with the communication module and the 12V direct current power supply through the connector and the wire harness, the communication module is connected with the test computer, and the test computer is connected with the test computer. And the test circuit board is connected with the power battery through a connector and a wire harness. The detection device for the communication control function of the automobile power battery provided by the utility model has the advantages of low manufacturing cost, simplicity in operation and the like, and can quickly lock an abnormal point when a product has an abnormal problem in a testing process, so that quick processing is carried out.

Description

Technical Field

[0001] The utility model belongs to the technical field of automobile power batteries, and in particular relates to a detection device for a communication control function of an automobile power battery. Background Art

[0002] At present, the production process of automotive power battery assemblies requires testing of battery functions, among which the battery communication control function directly affects the normal use of the battery. Most of the existing battery communication control function tests are tested using a simulated communication model built by the components of the vehicle and battery communication. During the existing simulated communication model test, the automotive power battery communication is first connected to the simulated communication model, and then the simulated communication model and the automotive power battery assembly are powered by low voltage. At the same time, instructions and parameter collection are sent on the test computer, and finally the battery communication control function status is determined according to the feedback results of the simulated communication model and the collected data.

[0003] From the above operations, we can know that the construction of the simulation communication model must meet the communication and interaction of all battery functions, and must ensure smooth operation, in order to effectively ensure the test accuracy of the battery communication control function. This is because if the construction of the simulation communication model does not meet the communication and interaction of all battery functions, then in the later battery detection process, if a test abnormality occurs, it is impossible to accurately and quickly lock the abnormal component and specific problem, and troubleshooting will cause a lot of man-hours to be wasted.

[0004] As the functions of the entire vehicle are developed and upgraded, the analog communication model must also be changed and upgraded. Since the battery communication function involves many components of the entire vehicle, the analog communication model will need to be frequently upgraded and debugged, which will result in a large amount of material waste and labor time waste in the process. Utility Model Content

[0005] The purpose of the utility model is to provide a detection device for the communication control function of an automobile power battery, so as to solve the problems of high cost of building a simulation communication model, complex testing process, difficulty in locking abnormal test problems, and high cost of subsequent upgrade and maintenance in the existing simulation communication model built by the components of the whole vehicle and the battery for testing the communication control function of the automobile power battery. The detection device for the communication control function of an automobile power battery provided by the utility model has the advantages of low manufacturing cost and simple operation. When an abnormal problem occurs in the product during the test, the abnormal point can be quickly locked, so as to be quickly processed.

[0006] The technical solutions adopted by the utility model to solve the technical problems are as follows:

[0007] The utility model discloses a detection device for the communication control function of an automobile power battery, comprising: a power battery, a connector, a wiring harness, a communication module, a test computer and a 12V DC power supply, wherein the power battery is respectively connected to the communication module and the 12V DC power supply through the connector and the wiring harness, and the communication module is connected to the test computer, and further comprises: a test circuit board connected to the power battery through the connector and the wiring harness.

[0008] Furthermore, the test circuit board includes: a vehicle CAN circuit, an internal CAN circuit, a charging CAN circuit, an excitation fuse start circuit, a charging wake-up circuit, a power input circuit, an ON gear wake-up circuit, a battery CC2 circuit, a charging socket temperature acquisition circuit, a high-voltage interlock input circuit, a high-voltage interlock output circuit, a K7 contactor high-side drive circuit, a K5 contactor high-side drive circuit, a K6 contactor high-side drive circuit, an S1 contactor high-side drive circuit, a K8 contactor high-side drive circuit, a K5 contactor auxiliary contact, a K6 contactor auxiliary contact, an S1 contactor auxiliary contact, a K7 contactor indication switch circuit, a K8 contactor indication switch circuit, a K5 contactor indication switch circuit, a K6 contactor indication switch circuit, and an S1 contactor indication switch circuit. , resistor one, resistor two, resistor three, resistor four, resistor five and resistor six; both ends of the vehicle CAN circuit, both ends of the internal CAN circuit, both ends of the charging CAN circuit, both ends of the excitation fuse start circuit, the charging wake-up circuit, both ends of the power input circuit, the ON gear wake-up circuit, one end of the battery CC2 circuit, both ends of the charging socket temperature collection circuit, one end of the high-voltage interlock input circuit, one end of the high-voltage interlock output circuit, one end of the K7 contactor high-side drive circuit, one end of the K5 contactor high-side drive circuit, one end of the K6 contactor high-side drive circuit, one end of the S1 contactor high-side drive circuit, one end of the K8 contactor high-side drive circuit, one end of the K5 contactor auxiliary contact, one end of the K6 contactor auxiliary contact, and one end of the S1 contactor auxiliary contact are all connected to the power battery through a connector;

[0009] The two ends of the vehicle CAN circuit are respectively connected to the communication module, the two ends of the internal CAN circuit are respectively connected to the communication module, the two ends of the charging CAN circuit are respectively connected to the terminal ① and the terminal ② of the 12V DC power supply, the two ends of the excitation fuse starting circuit are respectively connected to the terminal ③ and the terminal ④ of the 12V DC power supply, the charging wake-up circuit is connected to the positive pole of the 12V DC power supply through the switch, the two ends of the power input circuit are respectively connected to the 12V DC power supply, the ON gear wake-up circuit is connected to the power battery through the connector, one end of the battery CC2 circuit is connected to the power battery through the connector, and the other end of the battery CC2 circuit is connected to the negative pole of the power input circuit through resistor 1, the 1+ end of the charging socket temperature acquisition circuit is connected to the negative end of the charging socket temperature acquisition circuit through resistor 3, and the 2+ end of the charging socket temperature acquisition circuit is connected to the negative end of the charging socket temperature acquisition circuit through resistor 2. The high-voltage interlock input circuit is connected to the high-voltage interlock output circuit through a switch, the K7 contactor high-side drive circuit is connected to the negative pole of the power input circuit through the K7 contactor indication switch circuit, the K5 contactor high-side drive circuit is connected to the negative pole of the power input circuit through the K5 contactor indication switch circuit, the K6 contactor high-side drive circuit is connected to the negative pole of the power input circuit through the K6 contactor indication switch circuit, the S1 contactor high-side drive circuit is connected to the negative pole of the power input circuit through the S1 contactor indication switch circuit, the K8 contactor high-side drive circuit is connected to the negative pole of the power input circuit through the K8 contactor indication switch circuit, the K5 contactor auxiliary contact is connected to the negative pole of the power input circuit through resistor four, the K6 contactor auxiliary contact is connected to the negative pole of the power input circuit through resistor five, and the S1 contactor auxiliary contact is connected to the negative pole of the power input circuit through resistor six.

[0010] Furthermore, the K7 contactor indication switch circuit, the K8 contactor indication switch circuit, the K5 contactor indication switch circuit, the K6 contactor indication switch circuit and the S1 contactor indication switch circuit are all composed of an indicator light, a resistor and a control loop switch.

[0011] Furthermore, the resistance values ​​of the resistor one, resistor two, resistor three, resistor four, resistor five and resistor six are 1 kΩ, 10 kΩ, 10 kΩ, 10 kΩ, 10 kΩ and 10 kΩ respectively.

[0012] Furthermore, it is determined whether the charging CAN circuit of the power battery is normal through the charging CAN circuit.

[0013] Furthermore, the excitation fuse starting circuit is used to determine whether the excitation fuse starting circuit of the power battery is normal; the charging wake-up circuit is connected to the positive pole of the 12V DC power supply through a switch, and the charging wake-up circuit is used to determine whether the fast charging function of the power battery is normal.

[0014] Furthermore, the battery information is outputted from the vehicle CAN to determine whether the power supply circuit of the power battery is normal; and the ON activation circuit is tested to determine whether it is normal based on the activation voltage read by the test computer.

[0015] Furthermore, whether the CC2 circuit of the power battery is normal is determined based on whether the CC2 voltage on the test computer changes from 11.8V to 5.6V; and whether the charging socket temperature collection circuit of the power battery is normal is determined based on the temperature value collected on the test computer.

[0016] Furthermore, the high-voltage interlock input circuit and the high-voltage interlock output circuit are connected via a switch, and the switch controls the connection between the high-voltage interlock input circuit and the high-voltage interlock output circuit. The fault code is refreshed on the test computer, and whether the high-voltage interlock function detection circuit of the power battery is normal is determined based on the interlock code.

[0017] Furthermore, observe the status of the indicator lights in the K5 contactor indication switch circuit, the indicator lights in the K6 contactor indication switch circuit, and the indicator lights in the S1 contactor indication switch circuit on the test circuit board, and determine whether the K5 contactor auxiliary contact detection circuit, the K6 contactor auxiliary contact detection circuit, and the S1 contactor auxiliary contact detection circuit of the power battery are normal according to the on and off of the indicator lights; input the closing commands of the K5 contactor high-side drive circuit, the K6 contactor high-side drive circuit, the K7 contactor high-side drive circuit, the K8 contactor high-side drive circuit, and the S1 contactor high-side drive circuit in the test computer respectively, and determine whether the K5 contactor high-side drive circuit, the K6 contactor high-side drive circuit, the K7 contactor high-side drive circuit, the K8 contactor high-side drive circuit, and the S1 contactor high-side drive circuit of the power battery are normal according to the on and off of the indicator lights in the K5 contactor indication switch circuit, the K6 contactor indication switch circuit, the K7 contactor indication switch circuit, the K8 contactor high-side drive circuit, and the S1 contactor indication switch circuit.

[0018] The beneficial effects of the utility model are:

[0019] The utility model provides a detection device for the communication control function of an automobile power battery, which not only realizes the test function of the communication control function of the power battery, but also has a simple structure, is easy to use, and has strong applicability. It realizes the function of quickly locking the abnormality of the battery and can test the status of the battery components controlled by the vehicle. The device has a low manufacturing cost and is easy to maintain, which is conducive to reducing the cost of setting up the test environment and the subsequent maintenance costs.

[0020] The utility model provides a detection device for the communication control function of an automobile power battery. When testing an abnormality in the battery, the abnormal circuit can be quickly locked, thereby reducing the troubleshooting time and personnel input. The device has a simple structure, convenient and efficient testing, and low manufacturing cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 The utility model provides an overall structural diagram of a detection device for a vehicle power battery communication control function.

[0022] Figure 2 A detailed structural diagram of a detection device for a vehicle power battery communication control function provided by the utility model.

[0023] In the figure, there are power battery 1, connector 2, wiring harness 3, test circuit board 4, communication module 5, test computer 6, and 12V DC power supply 7. DETAILED DESCRIPTION

[0024] In order to solve the problems of complex construction, high production cost and inability to accurately lock faults in the battery assembly test model in the prior art, the utility model provides a novel, efficient, convenient and low-cost detection device for the communication control function of a vehicle power battery.

[0025] like Figure 1 As shown, the utility model provides a detection device for the communication control function of a vehicle power battery, which mainly includes: a power battery 1, a connector 2, a wiring harness 3, a test circuit board 4, a communication module 5, a test computer 6 and a 12V DC power supply 7; the power battery 1 is connected to the test circuit board 4, the communication module 5 and the 12V DC power supply 7 through the connector 2 and the wiring harness 3, respectively, and the communication module 5 is connected to the test computer 6. Specifically, one end of the wiring harness 3 is connected and fixed to the connector 2 of the power battery 1, the output definition of the other end of the wiring harness 3 is welded on the test circuit board 4, the communication definition of the other end of the wiring harness 3 is connected to the communication module 5, the power supply definition of the other end of the wiring harness 3 is connected to the 12V DC power supply 7, and the transmission line of the communication module 5 is connected to the test computer 6.

[0026] Among them, the 12V DC power supply 7 is used to provide low-voltage control energy to the power battery 1. During the test, the test computer 6 transmits the test command to the power battery 1 through the communication module 5. After receiving the test command, the power battery 1 identifies it. After the identification is completed, the test command is output to the test circuit board 4 according to the content of the test command. At the same time, the information feedback by the power battery 1 is also fed back to the test computer 6 through the communication module 5. After receiving the test command content sent by the power battery 1, the test circuit board 4 feeds back the corresponding instruction information according to different circuits. The tester observes the test results on the test circuit board 4 and determines the status of the power battery 1 communication circuit based on the instruction information, and then determines the status of the power battery 1 communication control function, thereby realizing the test of the communication control function of the vehicle power battery 1.

[0027] The utility model provides a detection device for the communication control function of a vehicle power battery 1, which realizes a fast and convenient test of the communication control function of the vehicle power battery 1.

[0028] like Figure 2 As shown, in a detection device for the communication control function of a vehicle power battery 1 provided by the utility model, the test circuit board 4 mainly includes:

[0029] Vehicle CAN circuit 401, internal CAN circuit 402, charging CAN circuit 403, excitation fuse start circuit 404, charging wake-up circuit 405, power input circuit 406, ON gear wake-up circuit 407, battery CC2 circuit 408, charging socket temperature acquisition circuit 409, high-voltage interlock input circuit 410, high-voltage interlock output circuit 411, K7 contactor high-side drive circuit 412, K5 contactor high-side drive circuit 413, K6 contactor high-side drive circuit 414, S1 contactor high-side drive Circuit 415, K8 contactor high side drive circuit 416, K5 contactor auxiliary contact 417, K6 contactor auxiliary contact 418, S1 contactor auxiliary contact 419, K7 contactor indication switch circuit 420, K8 contactor indication switch circuit 421, K5 contactor indication switch circuit 422, K6 contactor indication switch circuit 423, S1 contactor indication switch circuit 424 and 6 resistors (resistor 1 R1, resistor 2 R2, resistor 3 R3, resistor 4 R4, resistor 5 R5 and resistor 6 R6). Among them, K7 contactor indication switch circuit 420, K8 contactor indication switch circuit 421, K5 contactor indication switch circuit 422, K6 contactor indication switch circuit 423 and S1 contactor indication switch circuit 424 are all composed of an indicator light, a resistor and a control circuit switch.

[0030] Among them, both ends of the vehicle CAN circuit 401 (CAN-L and CAN-H), both ends of the internal CAN circuit 402 (CAN-L and CAN-H), both ends of the charging CAN circuit 403 (CAN-L and CAN-H), both ends of the excitation fuse starting circuit 404, the charging wake-up circuit 405, both ends of the power input circuit 406, the ON gear wake-up circuit 407, one end of the battery CC2 circuit 408, both ends of the charging socket temperature acquisition circuit 409, one end of the high-voltage interlock input circuit 410, one end of the high-voltage interlock output circuit 411, one end of the K7 contactor high-side drive circuit 412, one end of the K5 contactor high-side drive circuit 413, one end of the K6 contactor high-side drive circuit 414, one end of the S1 contactor high-side drive circuit 415, one end of the K8 contactor high-side drive circuit 416, one end of the K5 contactor auxiliary contact 417, one end of the K6 contactor auxiliary contact 418, and one end of the S1 contactor auxiliary contact 419 are all connected to the power battery 1 through the connector 2.

[0031] Among them, the two ends (CAN-L and CAN-H) of the vehicle CAN circuit 401 are respectively connected to the communication module 5, the two ends (CAN-L and CAN-H) of the internal CAN circuit 402 are respectively connected to the communication module 5, the two ends (CAN-L and CAN-H) of the charging CAN circuit 403 are respectively connected to the terminal ① and the terminal ② of the 12V DC power supply 7, the two ends of the excitation fuse starting circuit 404 are respectively connected to the terminal ③ and the terminal ④ of the 12V DC power supply 7, and the charging wake-up circuit 405 is connected to the positive pole of the 12V DC power supply 7 through the switch. The two ends of the power input circuit 406 are respectively connected to the 12V DC power supply 7, the ON gear wake-up circuit 407 is connected to the power battery 1 through the connector 2, one end of the battery CC2 circuit 408 is connected to the power battery 1 through the connector 2, and the other end of the battery CC2 circuit 408 is connected to the negative pole of the power input circuit 406 through the resistor 1 R1, the 1+ end of the charging socket temperature collection circuit 409 is connected to the negative end of the charging socket temperature collection circuit 409 through the resistor 3 R3, and the 2+ end of the charging socket temperature collection circuit 409 is connected to the charging socket temperature through the resistor 2 R2. The negative end of the acquisition circuit 409 is connected, the high-voltage interlock input circuit 410 is connected to the high-voltage interlock output circuit 411 through a switch, the K7 contactor high-side drive circuit 412 is connected to the negative pole of the power input circuit 406 through the K7 contactor indication switch circuit 420, the K5 contactor high-side drive circuit 413 is connected to the negative pole of the power input circuit 406 through the K5 contactor indication switch circuit 422, the K6 contactor high-side drive circuit 414 is connected to the negative pole of the power input circuit 406 through the K6 contactor indication switch circuit 423, and the S1 contactor high The side drive circuit 415 is connected to the negative pole of the power input circuit 406 through the S1 contactor indication switch circuit 424, the K8 contactor high side drive circuit 416 is connected to the negative pole of the power input circuit 406 through the K8 contactor indication switch circuit 421, the K5 contactor auxiliary contact 417 is connected to the negative pole of the power input circuit 406 through the resistor four R4, the K6 contactor auxiliary contact 418 is connected to the negative pole of the power input circuit 406 through the resistor five R5, and the S1 contactor auxiliary contact 419 is connected to the negative pole of the power input circuit 406 through the resistor six R6.

[0032] Among them, the resistance values ​​of resistor 1 R1, resistor 2 R2, resistor 3 R3, resistor 4 R4, resistor 5 R5 and resistor 6 R6 are 1kΩ, 10kΩ, 10kΩ, 10kΩ, 10kΩ and 10kΩ respectively.

[0033] The utility model provides a detection device for the communication control function of a vehicle power battery 1. When used,

[0034] The communication module 5 is connected to both ends (CAN-L and CAN-H) of the vehicle CAN circuit 401 and both ends (CAN-L and CAN-H) of the internal CAN circuit 402 respectively. The test computer 6 sends the execution command to the vehicle CAN communication circuit and the internal CAN communication circuit through the communication module 5, the vehicle CAN circuit 401 and the internal CAN circuit 402, and determines whether the vehicle CAN communication circuit and the internal CAN communication circuit are normal according to the feedback information of the power battery 1.

[0035] The two ends (CAN-L and CAN-H) of the charging CAN circuit 403 are respectively connected to the terminal ① and the terminal ② of the 12V DC power supply 7, and the charging CAN circuit 403 is used to determine whether the charging CAN circuit of the power battery 1 is normal;

[0036] The two ends of the excitation fuse starting circuit 404 are respectively connected to the terminal ③ and the terminal ④ of the 12V DC power supply 7, and the excitation fuse starting circuit 404 is used to determine whether the excitation fuse starting circuit of the power battery 1 is normal;

[0037] Connect the charging wake-up circuit 405 to the positive electrode of the 12V DC power supply 7 through a switch, and determine whether the fast charging function of the power battery 1 is normal through the charging wake-up circuit 405;

[0038] Both ends of the power input circuit 406 are connected to the 12V DC power supply 7, which is connected to the battery. The battery information is outputted from the vehicle CAN to determine whether the power circuit of the power battery 1 is normal.

[0039] The ON gear wake-up circuit 407 is connected to the power battery 1 through the connector 2, and reads the activation voltage of the test computer 6 to test whether the ON activation circuit is normal;

[0040] One end of the battery CC2 circuit 408 is connected to the power battery 1 through the connector 2, and the other end of the battery CC2 circuit 408 is connected to the negative electrode of the power input circuit 406 through a resistor R1. Whether the CC2 circuit of the power battery 1 is normal is determined based on whether the CC2 voltage on the test computer 6 changes from 11.8V to 5.6V; specifically, during the test of the communication port of the power battery 1, the CC2 circuit test switch is turned on, and the CC2 circuit voltage is observed to change from 11.8V to 5.6V on the test computer 6, which indicates that the CC2 circuit is normal. If the CC2 circuit test switch is turned on, and the CC2 circuit voltage is observed to remain at 11.8V on the test computer 6 without any change, it indicates that the CC2 circuit is abnormal, and the CC2 circuit and the BMS module need to be checked;

[0041] The 1+ terminal of the charging socket temperature acquisition circuit 409 is connected to the negative terminal of the charging socket temperature acquisition circuit 409 through the resistor R3, and the 2+ terminal of the charging socket temperature acquisition circuit 409 is connected to the negative terminal of the charging socket temperature acquisition circuit 409 through the resistor R2. The resistor R2 and the resistor R3 are connected between the charging socket temperature 1+, 2+ and the charging socket temperature, and the charging socket temperature acquisition circuit of the power battery 1 is determined to be normal according to the temperature 1 and temperature 2 values ​​collected on the test computer 6;

[0042] The high-voltage interlock input circuit 410 and the high-voltage interlock output circuit 411 are connected via a switch, and the high-voltage interlock input circuit 410 and the high-voltage interlock output circuit 411 are connected via the switch control, and the fault code is refreshed in the test computer 6, and it is determined whether the high-voltage interlock function detection circuit of the power battery 1 is normal according to the interlock code;

[0043] The K7 contactor high-side drive circuit 412 is connected to the negative pole of the power input circuit 406 through the K7 contactor indication switch circuit 420, the K5 contactor high-side drive circuit 413 is connected to the negative pole of the power input circuit 406 through the K5 contactor indication switch circuit 422, the K6 contactor high-side drive circuit 414 is connected to the negative pole of the power input circuit 406 through the K6 contactor indication switch circuit 423, the S1 contactor high-side drive circuit 415 is connected to the negative pole of the power input circuit 406 through the S1 contactor indication switch circuit 424, and the K8 contactor high-side drive circuit 416 is connected to the negative pole of the power input circuit 406 through the S1 contactor indication switch circuit 424. The contactor high-side drive circuit 416 is connected to the negative pole of the power input circuit 406 through the K8 contactor indication switch circuit 421, the K5 contactor auxiliary contact 417 is connected to the negative pole of the power input circuit 406 through the resistor R4, the K6 contactor auxiliary contact 418 is connected to the negative pole of the power input circuit 406 through the resistor R5, and the S1 contactor auxiliary contact 419 is connected to the negative pole of the power input circuit 406 through the resistor R6; observe the indicator light in the K5 contactor indication switch circuit 422 and the K6 contactor indication switch circuit on the test circuit board 4. The indicator light in 423 and the indicator light in the S1 contactor indicating switch circuit 424 are used to determine whether the K5 contactor auxiliary contact detection circuit, the K6 contactor auxiliary contact detection circuit and the S1 contactor auxiliary contact detection circuit of the power battery 1 are normal according to the on and off of each indicator light; the K5 contactor high-side drive circuit 413, the K6 contactor high-side drive circuit 414, the K7 contactor high-side drive circuit 412, the K8 contactor high-side drive circuit 416, and the S1 contactor high-side drive circuit 415 are input into the test computer 6 in sequence. The closing command is given, and the indicator light in the K5 contactor indication switch circuit 422, the indicator light in the K6 contactor indication switch circuit 423, the indicator light in the K7 contactor indication switch circuit 420, the indicator light in the K8 contactor indication switch circuit 421, and the indicator light in the S1 contactor indication switch circuit 424 are turned on or off to determine whether the K5 contactor high-side drive circuit, the K6 contactor high-side drive circuit, the K7 contactor high-side drive circuit, the K8 contactor high-side drive circuit, and the S1 contactor high-side drive circuit of the power battery 1 are normal.

[0044] The utility model provides a detection device for the communication control function of an automobile power battery 1, which can test the power battery 1 step by step during the test, and can quickly lock the battery fault position during the test, effectively reducing the waste of man-hours and personnel in the later troubleshooting process, and realizing fast and convenient testing of the communication control function of the automobile power battery 1.

[0045] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein, but these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. A detection device for a vehicle power battery communication control function, comprising: A power battery, a connector, a wiring harness, a communication module, a test computer and a 12V DC power supply, wherein the power battery is connected to the communication module and the 12V DC power supply respectively through a connector and a wiring harness, and the communication module is connected to the test computer. It is characterized in that it also includes: a test circuit board connected to the power battery through a connector and a wiring harness.

2. The detection device for the communication control function of a vehicle power battery according to claim 1, characterized in that: The test circuit board includes: a vehicle CAN circuit, an internal CAN circuit, a charging CAN circuit, an excitation fuse starting circuit, a charging wake-up circuit, a power input circuit, an ON gear wake-up circuit, a battery CC2 circuit, a charging socket temperature acquisition circuit, a high-voltage interlock input circuit, a high-voltage interlock output circuit, a K7 contactor high-side drive circuit, a K5 contactor high-side drive circuit, a K6 contactor high-side drive circuit, an S1 contactor high-side drive circuit, a K8 contactor high-side drive circuit, a K5 contactor auxiliary contact, a K6 contactor auxiliary contact, an S1 contactor auxiliary contact, a K7 contactor indication switch circuit, a K8 contactor indication switch circuit, a K5 contactor indication switch circuit, a K6 contactor indication switch circuit, an S1 contactor indication switch circuit, an electric Resistor 1, resistor 2, resistor 3, resistor 4, resistor 5 and resistor 6; both ends of the vehicle CAN circuit, both ends of the internal CAN circuit, both ends of the charging CAN circuit, both ends of the excitation fuse start circuit, the charging wake-up circuit, both ends of the power input circuit, the ON gear wake-up circuit, one end of the battery CC2 circuit, both ends of the charging socket temperature collection circuit, one end of the high-voltage interlock input circuit, one end of the high-voltage interlock output circuit, one end of the K7 contactor high-side drive circuit, one end of the K5 contactor high-side drive circuit, one end of the K6 contactor high-side drive circuit, one end of the S1 contactor high-side drive circuit, one end of the K8 contactor high-side drive circuit, one end of the K5 contactor auxiliary contact, one end of the K6 contactor auxiliary contact, and one end of the S1 contactor auxiliary contact are all connected to the power battery through a connector; The two ends of the vehicle CAN circuit are respectively connected to the communication module, the two ends of the internal CAN circuit are respectively connected to the communication module, the two ends of the charging CAN circuit are respectively connected to the terminal ① and the terminal ② of the 12V DC power supply, the two ends of the excitation fuse starting circuit are respectively connected to the terminal ③ and the terminal ④ of the 12V DC power supply, the charging wake-up circuit is connected to the positive pole of the 12V DC power supply through the switch, the two ends of the power input circuit are respectively connected to the 12V DC power supply, the ON gear wake-up circuit is connected to the power battery through the connector, one end of the battery CC2 circuit is connected to the power battery through the connector, and the other end of the battery CC2 circuit is connected to the negative pole of the power input circuit through resistor 1, the 1+ end of the charging socket temperature acquisition circuit is connected to the negative end of the charging socket temperature acquisition circuit through resistor 3, and the 2+ end of the charging socket temperature acquisition circuit is connected to the negative end of the charging socket temperature acquisition circuit through resistor 2. The high-voltage interlock input circuit is connected to the high-voltage interlock output circuit through a switch, the K7 contactor high-side drive circuit is connected to the negative pole of the power input circuit through the K7 contactor indication switch circuit, the K5 contactor high-side drive circuit is connected to the negative pole of the power input circuit through the K5 contactor indication switch circuit, the K6 contactor high-side drive circuit is connected to the negative pole of the power input circuit through the K6 contactor indication switch circuit, the S1 contactor high-side drive circuit is connected to the negative pole of the power input circuit through the S1 contactor indication switch circuit, the K8 contactor high-side drive circuit is connected to the negative pole of the power input circuit through the K8 contactor indication switch circuit, the K5 contactor auxiliary contact is connected to the negative pole of the power input circuit through resistor four, the K6 contactor auxiliary contact is connected to the negative pole of the power input circuit through resistor five, and the S1 contactor auxiliary contact is connected to the negative pole of the power input circuit through resistor six.

3. The detection device for the communication control function of a vehicle power battery according to claim 2, characterized in that: The K7 contactor indicating switch circuit, the K8 contactor indicating switch circuit, the K5 contactor indicating switch circuit, the K6 contactor indicating switch circuit and the S1 contactor indicating switch circuit are all composed of an indicator light, a resistor and a control loop switch.

4. The detection device for the communication control function of a vehicle power battery according to claim 2, characterized in that: The resistance values ​​of the resistor 1, resistor 2, resistor 3, resistor 4, resistor 5 and resistor 6 are 1 kΩ, 10 kΩ, 10 kΩ, 10 kΩ, 10 kΩ and 10 kΩ respectively.

5. The detection device for the communication control function of a vehicle power battery according to claim 2, characterized in that: The charging CAN circuit is used to determine whether the charging CAN circuit of the power battery is normal.

6. The detection device for the communication control function of a vehicle power battery according to claim 2, characterized in that: The excitation fuse starting circuit is used to determine whether the excitation fuse starting circuit of the power battery is normal; the charging wake-up circuit is connected to the positive pole of the 12V DC power supply through a switch, and the charging wake-up circuit is used to determine whether the fast charging function of the power battery is normal.

7. The detection device for the communication control function of a vehicle power battery according to claim 2, characterized in that: According to the battery information output by the vehicle CAN, determine whether the power circuit of the power battery is normal; according to the activation voltage reading of the test computer, test whether the ON activation circuit is normal.

8. The detection device for the communication control function of a vehicle power battery according to claim 2, characterized in that: Whether the CC2 circuit of the power battery is normal is determined by whether the CC2 voltage on the test computer changes from 11.8V to 5.6V; whether the temperature collection circuit of the charging socket of the power battery is normal is determined by the temperature value collected on the test computer.

9. The detection device for the communication control function of a vehicle power battery according to claim 2, characterized in that: The high-voltage interlock input circuit and the high-voltage interlock output circuit are connected via a switch, and the switch controls the connection between the high-voltage interlock input circuit and the high-voltage interlock output circuit. The fault code is refreshed on the test computer, and whether the high-voltage interlock function detection circuit of the power battery is normal is determined based on the interlock code.

10. The detection device for the communication control function of a vehicle power battery according to claim 2, characterized in that: Observe the status of the indicator lights in the K5 contactor indication switch circuit, the K6 contactor indication switch circuit and the S1 contactor indication switch circuit on the test circuit board, and judge whether the K5 contactor auxiliary contact detection circuit, the K6 contactor auxiliary contact detection circuit and the S1 contactor auxiliary contact detection circuit of the power battery are normal according to the on and off of the indicator lights; input the closing commands of the K5 contactor high-side drive circuit, the K6 contactor high-side drive circuit, the K7 contactor high-side drive circuit, the K8 contactor high-side drive circuit and the S1 contactor high-side drive circuit in the test computer respectively, and judge whether the K5 contactor high-side drive circuit, the K6 contactor high-side drive circuit, the K7 contactor high-side drive circuit, the K8 contactor high-side drive circuit and the S1 contactor high-side drive circuit of the power battery are normal according to the on and off of the indicator lights in the K5 contactor indication switch circuit, the K6 contactor indication switch circuit, the K7 contactor indication switch circuit, the K8 contactor indication switch circuit and the S1 contactor indication switch circuit.

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