Insulation tool between battery cell strings of lithium battery module

Abstract

The utility model discloses a lithium battery module cell inter-string insulation tool, which comprises a test tool plate and a bottom plate, a handle is arranged on the test tool plate, the handle is used for lifting and pressing the test tool plate, two rows of kidney-shaped holes are uniformly distributed on the test tool plate, probes are arranged in the kidney-shaped holes, the probes are grouped in pairs and are arranged at intervals, and the bottom plate is arranged on the test tool plate. The positions of the probes correspond to the exposed aluminum positions of the lithium battery module to form an upper row of probe groups and a lower row of probe groups, the probes are in complete contact with the exposed aluminum positions by manually pressing down the handle, and a plurality of limiting blocks are arranged on the side edge of the testing tool plate; the device is simple in structure, can test the insulation resistance value and leakage current between each string of battery cells of the whole module at one time, is stable and safe during the insulation test between the battery cell strings of the module, is better than a manual independent test effect, is convenient and rapid to operate, and greatly improves the test efficiency; and when modules of different products are adapted, the positions of the probes can be adjusted, so that the cost is low and flexibility is realized.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery technology, specifically to an insulation fixture for inter-cell strings in a lithium battery module. Background Technology

[0002] Lithium-ion batteries are widely used due to their advantages such as high operating voltage, long cycle life, high energy density, and no pollution. This has led to significant concerns about battery safety. During the assembly and production of lithium-ion battery modules, the blue film in the cell is at risk of damage that is difficult to detect, posing an insulation risk and thus affecting the battery's safety performance and lifespan.

[0003] Current production technology typically uses insulation meters and withstand voltage testers to individually test the insulation resistance and leakage current between each string of cells. This requires manual observation and alignment, which is time-consuming when there are many cell strings. Furthermore, operator fatigue or lack of concentration can lead to inaccurate alignment of the test points, potentially causing cell damage or electric shock, posing safety hazards. Therefore, an insulating fixture is needed. Summary of the Invention

[0004] The purpose of this utility model is to provide an insulation fixture for inter-cell strings of lithium battery modules to solve the problems mentioned in the background art. To achieve the above objective, this utility model provides the following technical solution: an insulation fixture for inter-cell strings of lithium battery modules, including a test fixture plate and a base plate. The test fixture plate is provided with a handle for lifting and pressing the test fixture plate. The test fixture plate has two rows of evenly distributed waist holes, and probes are provided in the waist holes. The probes are arranged in pairs and spaced apart. The probe positions correspond to the exposed aluminum parts of the lithium battery module, forming two upper and lower probe groups. By manually pressing down the handle, the probes can be made to fully contact each exposed aluminum part. The side of the test fixture plate is provided with multiple limiting blocks.

[0005] Preferably, the base plate is provided with a terminal block, which has a positive terminal and a negative terminal, and the positive terminal and the negative terminal are used for connecting the insulation testing instrument.

[0006] Preferably, the top of each probe is connected in series with a positive wire and a negative wire, with the end of the positive wire connected to the positive terminal and the end of the negative wire connected to the negative terminal.

[0007] Preferably, the test fixture is made of nylon.

[0008] Preferably, the insulation testing instrument is an insulation meter or a withstand voltage tester.

[0009] Compared with the prior art, the beneficial effects of this utility model are: this utility model can test the insulation resistance and leakage current between each string of cells in the entire module at one time, and achieves stability and safety in the insulation test between the strings of cells in the module, which is better than the effect of manual individual testing. It is convenient and quick to operate, and greatly improves the testing efficiency.

[0010] When adapting to modules of different products, simply adjust the probe position; this is both cost-effective and flexible.

[0011] The separately led-out terminals can be connected to a multimeter or withstand voltage tester using alligator clips, avoiding improper operation and mitigating the risk of damaging the battery cells and endangering personal safety. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0013] Figure 2 This is a schematic diagram of the test fixture plate structure in this utility model;

[0014] Figure 3 This is a top view of the test fixture plate in this utility model;

[0015] Figure 4 This is a schematic diagram of the present invention after the battery module is assembled;

[0016] Figure 5 Top view of the battery module;

[0017] In the diagram, the components are: test fixture plate-1, handle-11, waist hole-12, probe-13, limit block-14, base plate-2, terminal block-21, positive terminal-22, negative terminal-23, positive wire-31, negative wire-32, and exposed aluminum section-4. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Please see Figure 1 This utility model provides a technical solution: an insulation fixture between lithium battery module cells, including a test fixture plate 1 and a base plate 2. The base plate 2 is provided with a terminal block 21, and the terminal block 21 is provided with a positive terminal 22 and a negative terminal 23. The positive terminal 22 and the negative terminal 23 are used for connecting an insulation testing instrument, which is an insulation meter or a withstand voltage tester.

[0020] The test fixture plate 1 is made of nylon and has a handle 11. The handle 11 is used to lift and press the test fixture plate 1. The test fixture plate 1 has two rows of waist holes 12 evenly distributed on it. The waist holes 12 are equipped with probes 13. The probes 13 are arranged in pairs and spaced apart. The position of the probes 13 corresponds to the exposed aluminum part 4 of the lithium battery module, forming two columns of probes. By manually pressing down the handle 11, the probes 13 can be made to fully contact each exposed aluminum part 4 to generate conductivity. When it is necessary to adapt to the modules of different products, the position of the probes 13 can be adjusted. It is low cost and flexible.

[0021] The top of each probe 13 is connected in series with the positive wire 31 and the negative wire 32 respectively. The connection method is welding or terminal block. After connection, insulation is required. The end of the positive wire 31 is connected to the positive terminal 22, and the end of the negative wire 32 is connected to the negative terminal 23.

[0022] The test fixture plate 1 is provided with multiple limiting blocks 14 on its side, which can prevent the test fixture plate 1 from moving or misaligning during the pressing process.

[0023] This device can test the insulation resistance and leakage current between all strings of cells in the entire module at once. It is stable and safe when testing the insulation between strings of cells in the module, and is superior to manual individual testing. It is convenient and quick to operate, and greatly improves testing efficiency.

[0024] Working principle: First, place the base plate on a horizontal workbench, then place the lithium battery module on the base plate, place the test fixture plate on the module, and align the probes with the exposed aluminum on the cell. Clamp the alligator clips leading out from the positive and negative terminals of the insulation tester or withstand voltage tester onto the corresponding positive and negative terminals, then press the handle to ensure that all probes are pressed down. Start the insulation tester or withstand voltage tester to begin the test. After the test is completed, lift the test fixture plate and transfer the module to the next process.

[0025] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A lithium battery module cell string insulation fixture, characterized in that: The test fixture includes a test fixture plate (1) and a base plate (2). The test fixture plate (1) is provided with a handle (11) for lifting and pressing the test fixture plate (1). The test fixture plate (1) has two rows of waist holes (12) evenly distributed on it. The waist holes (12) are provided with probes (13). The probes (13) are arranged in pairs and spaced apart. The position of the probes (13) corresponds to the exposed aluminum part (4) of the lithium battery module, forming two columns of probes. By manually pressing down the handle (11), the probes (13) can fully contact each exposed aluminum part (4). The side of the test fixture plate (1) is provided with multiple limiting blocks (14).

2. The lithium battery module cell string insulation fixture according to claim 1, characterized in that: The base plate (2) is provided with a terminal block (21), and the terminal block (21) is provided with a positive terminal (22) and a negative terminal (23). The positive terminal (22) and the negative terminal (23) are used for connecting the insulation testing instrument.

3. The lithium battery module cell string insulation fixture according to claim 2, characterized in that: The top of each probe (13) is connected in series with the positive wire (31) and the negative wire (32). The end of the positive wire (31) is connected to the positive terminal (22), and the end of the negative wire (32) is connected to the negative terminal (23).

4. The lithium battery module cell string insulation fixture according to claim 1, characterized in that: The test fixture plate (1) is made of nylon.

5. The lithium battery module cell string insulation fixture according to claim 2, characterized in that: The insulation testing instrument is an insulation meter or a withstand voltage tester.

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