Equipment for testing electrical board of forklift battery system

Abstract

The utility model discloses a device for testing an electrical board of a forklift battery system, the device is internally provided with a power supply device, a test component group and a test module, the output end of the power supply device is connected with a power supply interface, and the power supply interface is used for being connected with the positive electrode and the negative electrode of a discharge relay of the electrical board through wires. The test component group is connected with the signal input interface through the wire harness, the signal input interface is used for being connected with an output port of the electrical board through a wire, the test module is connected with the signal output interface through a signal wire, and the signal output interface is used for being connected with an input port of the electrical board through a wire. The testing equipment can be matched with an electrical board testing tool to inspect electrical parts and circuits on an electrical board in a previous process, so that the detection efficiency is improved, and the accuracy of a detection result is also improved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery detection. Background Art

[0002] At present, battery packs for forklifts on the market need to undergo strict testing and verification before leaving the factory. They can only be shipped when the battery system is free of faults to ensure that customers can use them normally. Usually, battery cells are assembled into battery modules, then into battery packs, and after being equipped with an electrical board, the entire battery system is subjected to charging and discharging test verification. That is to say, the electrical board lacks a separate test link. There is only a manual inspection process when assembling the electrical board. After the inspection is completed, the electrical board will be assembled into the battery pack and enter the final test link.

[0003] Existing testing equipment, such as the published document with the publication number CN112098739B, publication date February 23, 2024, and patent name "Battery Pack Short-Circuit Protection Test Circuit, Circuit Board and Testing Equipment", discloses a battery pack short-circuit protection test circuit, a circuit board and testing equipment. The circuit includes: a control chip, a driving circuit, a short-circuit control circuit, a short-circuit delay circuit and a short-circuit start circuit; the positive terminal of the short-circuit control circuit is used to connect to the positive electrode of the battery pack, and the negative terminal of the short-circuit control circuit is used to connect to the negative electrode of the battery pack; the negative terminal of the short-circuit control circuit is used to connect to the negative electrode of the battery pack; the short-circuit start circuit includes a first short-circuit start unit and a second short-circuit start unit; when the control chip receives the first short-circuit start signal sent by the first short-circuit start unit, or when the control chip receives the second short-circuit start signal sent by the second short-circuit start unit, the control chip drives the short-circuit control circuit through the driving circuit, so that the positive terminal and the negative terminal are short-circuited within the short-circuit time corresponding to the short-circuit start signal.

[0004] Similar detection equipment needs to test the electrical board by manual inspection and cooperate with the battery pack for overall testing in the final test link. Therefore, the risks are as follows:

[0005] 1. The efficiency of manual inspection is low. It is necessary to carefully check the wire harnesses inside the electrical board, consuming a lot of man-hours.

[0006] 2. There are risks in manual inspection. There is always a possibility of detection omission. Once there is a detection omission, it will bring problems of rework and potential safety hazards. Because if the relay sticks, there will be voltage at the back end, and if accidentally touched, there will be a fire and even a threat to personal safety. Summary of the Invention

[0007] The technical problem to be solved by the utility model is to realize an intelligent electrical board testing equipment for a forklift battery system. This testing equipment can replace manual inspection and complete the testing of the electrical board of the battery system through simple circuit connection.

[0008] To achieve the above object, the technical solution adopted by the present utility model is as follows: An apparatus for testing an electrical board of a forklift battery system, which is provided with a power supply, a test component group, and a test module inside. The output end of the power supply is connected to a power interface, and the power interface is used to connect the positive and negative poles of the discharge relay of the electrical board through a wire. The test component group is respectively connected to a signal input interface through a wire harness, and the signal input interface is used to connect the output port of the electrical board through a wire. The test module is connected to a signal output interface through a signal line, and the signal output interface is used to connect the input port of the electrical board through a wire.

[0009] The power supply, the test component group, and the test module are all fixed inside the housing, and the housing is provided with a power interface, a signal input interface, and a signal input interface.

[0010] The housing is provided with a communication port for connecting the test module, and the communication port is used to connect to a host computer.

[0011] The communication port is used to connect a barcode scanner.

[0012] The test component group includes a key switch, a buzzer, a square meter, and a discharge load resistor, and the key switch and the square meter are fixed on the surface of the housing.

[0013] The power supply is a rectifier and a transformer connected to the commercial power, and the power interface outputs 48V DC power to the electrical board.

[0014] The electrical board is an electrical board of a forklift battery system.

[0015] After simple circuit connection of the present utility model, the device can complete the test of the entire electrical board without assembling a battery to the electrical board. Manual inspection takes 3 - 5 minutes. It has a fast execution speed, shortens the detection time, and improves the operation efficiency on the production line; the entire detection device has higher accuracy, can avoid human inspection errors, reduces the risk of subsequent processes, and also protects the personal safety of the test process. And through data storage, it is convenient to view and trace the test information and results later. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The following briefly describes the content expressed in each drawing in the specification of the present utility model:

[0017] Figure 1 It is a schematic diagram of the apparatus for testing the electrical board of the forklift battery system. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] The following is a further detailed description of the specific implementation of the present utility model, such as the shapes, structures, mutual positions and connection relationships between various parts, the functions and working principles of each part, the manufacturing process, and the operation and use methods, with reference to the accompanying drawings, to help those skilled in the art have a more complete, accurate, and in-depth understanding of the inventive concept and technical solution of the present utility model.

[0019] The battery system electrical board is the electrical board of the forklift battery system, which is an integrated PCB board. Generally, it has a BMS, a shunt, a discharge relay, a charge relay, a heating relay, a heating fuse, and a main fuse. Corresponding connection terminals are provided on the electrical board, and electrical connections can be completed in a plug-in form. Design an intelligent electrical board test tooling for the forklift battery system, and this test tooling serves to replace manual inspection.

[0020] The equipment for testing the electrical board of the forklift battery system is provided with a housing. A power supply, a test component group, and a test module are fixed inside the housing. The power supply is fixed inside the housing. The power supply is a rectifier and a transformer connected to the mains. The input end is connected to a plug through a wire, so that it can be connected to the mains. The positive and negative poles of the discharge relay of the electrical board are connected through a wire. To improve versatility, various plugs are provided at one end of the wire connected to the electrical board. To adapt to the connections of different products, the power supply converts the AC mains voltage of 175 - 260V into a DC output of 48V to supply power to the electrical board.

[0021] The test component group is respectively connected to the signal input interface through wire harnesses. The test component group includes a key switch, a buzzer, a square meter, and a discharge load resistor. The key switch and the square meter are fixed on the surface of the housing. The function of the key switch is to start the test of the electrical board. The function of the buzzer is to determine whether the buzzer interface hardware and the wire harness on the BMS (Battery Management System) on the electrical board are normal. The function of the square meter is to determine whether the charging CAN (Controller Area Network) port and the discharge CAN port hardware and the wire harness on the BMS on the electrical board are normal. The function of the discharge load is to determine whether the current detection interface and the wire harness on the BMS on the electrical board are normal. The signal input interface is used to connect to the output port of the electrical board through a wire. To adapt to the connections of different products, this wire is equipped with various different types of connectors to connect to different styles of output ports of the electrical board, for obtaining the output signal of the electrical board and enabling different components of the test component group to execute, so as to achieve the test function.

[0022] The test module is connected to the signal output interface through a signal line. There is a storage unit in the test module, and the storage unit stores the execution instructions in the currently used test equipment. The signal output interface is used to connect to the input port of the electrical board through a wire. The test module can directly output the corresponding instructions to the electrical board, enabling the electrical board to "run through" the program according to the preset program, thereby identifying whether there are abnormalities in the electrical board. When testing, develop the intelligent detection host computer program for the electrical board and set the type of the electrical board, such as the same port (the battery system has a charging relay and a discharging relay), different ports (the charging circuit and the discharging circuit of the battery system use the same relay), with heating function (the battery system has a heating sheet and has a heating function), without heating function (the battery system has no heating sheet and does not have a heating function). The type of the electrical board can be set on the host computer. There is a communication port on the housing that connects to the test module. This communication port can be connected to the host computer through a data cable to input programs, change programs, etc. on the host computer, or can also be directly connected to a barcode scanner. The barcode scanner enters the "ID" number of each electrical board. All test results and information are automatically saved in a table for easy later traceability. Click the test button on the host computer. After the BMS receives the message instruction, it executes the corresponding test logic and will judge whether the insulation performance of the electrical board, the suction and disconnection functions of the relay, the wiring of the wire harness, etc. are normal. After the test is completed, the BMS will send the BMS fault code through the message. The host computer will judge whether the shunt wiring and the circuit of the BMS are normal according to the fault code sent by the BMS and the current value of the shunt.

[0023] This test equipment can cooperate with the electrical board test tooling to check the electrical components and circuits on the electrical board in the previous process, which not only improves the detection efficiency but also improves the accuracy of the detection results.

[0024] The present invention has been described exemplarily above in conjunction with the accompanying drawings. Obviously, the specific implementation of the present utility model is not limited by the above methods. As long as various non-substantive improvements are made by adopting the method concept and technical solution of the present invention, or the concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the protection scope of the present utility model.

Claims

1. An equipment for testing the electrical board of a forklift battery system, characterized in that: The device is internally provided with a power supply, a test component group, and a test module. The output end of the power supply is connected to a power interface, and the power interface is used to connect the positive and negative poles of the discharge relay of the electrical board through a wire. The test component group is respectively connected to a signal input interface through a wire harness, and the signal input interface is used to connect the output port of the electrical board through a wire. The test module is connected to a signal output interface through a signal line, and the signal output interface is used to connect the input port of the electrical board through a wire.

2. The device for testing the electrical board of a forklift battery system according to claim 1, characterized in that: The power supply, the test component group, and the test module are all fixed in the housing, and the housing is provided with a power interface, a signal input interface, and a signal input interface.

3. The device for testing the electrical board of a forklift battery system according to claim 2, characterized in that: The housing is provided with a communication port for connecting the test module, and the communication port is used to connect to a host computer.

4. The device for testing the electrical board of a forklift battery system according to claim 3, characterized in that: The communication port is used to connect a barcode scanner.

5. The device for testing the electrical board of a forklift battery system according to any one of claims 1-4, characterized in that: The test component group includes a key switch, a buzzer, a square meter, and a discharge load resistor, and the key switch and the square meter are fixed on the surface of the housing.

6. The device for testing the electrical board of a forklift battery system according to claim 5, characterized in that: The power supply is a rectifier and a transformer connected to the mains, and the power interface outputs 48V DC power to the electrical board.

7. The device for testing the electrical board of a forklift battery system according to claim 6, characterized in that: The electrical board is the electrical board of the forklift battery system.

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