Polymer soft package lithium ion battery edge voltage testing device

Abstract

The utility model discloses an edge voltage testing device for a polymer soft package lithium ion battery. The edge voltage testing device comprises a supporting structure used for supporting and accommodating a testing assembly; the driving device is used for driving the testing assembly to carry out voltage testing; the testing assembly comprises at least one positive electrode testing block and a negative electrode testing block, and the testing blocks are used for being in contact with positive and negative electrode lugs of the battery; and the display device is used for displaying a voltage test result and providing an alarm function. According to the utility model, different-size edge voltage tests of one-end-out tabs and two-end-out tabs are satisfied, the debugging and testing steps are simple, the accuracy is high, the testing efficiency is improved, and the labor cost is reduced.

Description

Technical Field

[0001] The utility model relates to the field of battery testing, and particularly relates to a side voltage testing device for polymer soft-pack lithium-ion batteries. Background Art

[0002] During the manufacturing process of polymer soft-pack lithium-ion batteries, the reliability of battery encapsulation is crucial for the performance and safety of the batteries. If the encapsulation is improper, problems such as battery swelling and liquid leakage may occur, seriously affecting the service life and safety performance of the batteries. Especially after the battery core is formed, the insulation condition between the positive and negative electrode tabs and the aluminum-plastic film is one of the important indicators for judging the encapsulation quality.

[0003] Traditional detection methods usually rely on manual operation, which is not only cumbersome but also prone to inaccurate detection results due to human factors, resulting in defective products not being screened out in time, increasing production risks and costs. In addition, with the expansion of the application fields of lithium-ion batteries, the market's requirements for battery detection efficiency and accuracy are also constantly increasing. Therefore, there is an urgent need for a side voltage testing device for soft-pack lithium-ion batteries with a simple structure, convenient operation, and capable of improving detection efficiency and accuracy. Summary of the Invention

[0004] In order to solve the above problems, the utility model provides a side voltage testing device for polymer soft-pack lithium-ion batteries, which can effectively solve the deficiencies in the prior art.

[0005] The utility model is realized through the following technical solutions: A side voltage testing device for polymer soft-pack lithium-ion batteries, comprising:

[0006] A support structure for supporting and accommodating the testing components;

[0007] A driving device for driving the testing components to perform voltage testing; and

[0008] Testing components, including at least one positive electrode testing block and one negative electrode testing block, the testing blocks being used to contact the positive and negative electrode tabs of the battery; and

[0009] A display device for displaying the voltage testing results and providing an alarm function.

[0010] As a preferred technical solution, the support structure is an electric wooden box, which internally accommodates a cylinder, circuits, and air pipes.

[0011] As a preferred technical solution, the driving device is a cylinder, the cylinder is installed on the electric wooden box, and the cylinder drives the testing components to move in the vertical direction.

[0012] As a preferred technical solution, a cross bar is installed at the output end of the cylinder, and a test assembly is installed on the cross bar. The test assembly is a spring test block, and the spring test block is aligned with the positive electrode tab and the negative electrode tab of the battery cell, and the spring test block is driven by the cylinder to contact and test the positive electrode tab and the negative electrode tab.

[0013] As a preferred technical solution, when testing a battery cell with positive and negative electrode tabs on the same side, two spring test blocks are installed on the cross bar, and the two spring test blocks are respectively aligned with the positive and negative electrode tabs on the same side;

[0014] When testing a battery cell with positive and negative electrode tabs on both sides, an auxiliary connecting rod is also installed on the cross bar. At this time, one spring test block is installed on the cross bar, and another spring test block is installed on the auxiliary connecting rod, which are used to align with the positive and negative electrode tabs on both sides respectively.

[0015] As a preferred technical solution, a front bumper and a side bumper are further included, which are fixed on the test platform for positioning the battery cell to be tested.

[0016] As a preferred technical solution, a bottom plate is further included, and the bottom plate is used to support the battery cell.

[0017] As a preferred technical solution, an external pneumatic switch and a power supply arranged on the electric control box are further included. The display device is a display screen, and two of them are provided.

[0018] As a preferred technical solution, a reset button is further arranged on the electric control box.

[0019] As a preferred technical solution, a puncturing device is further arranged in the support structure, and the puncturing device moves upward to pierce the edge of the aluminum-plastic film of the battery cell.

[0020] The beneficial effects of the present utility model are as follows: The side voltage test device for polymer soft-pack lithium-ion batteries provided by the present utility model has the advantages of simple structure and convenient operation. The test assembly is driven by a cylinder to automatically complete voltage testing and aluminum-plastic film puncturing detection, effectively simplifying the operation steps and improving the test efficiency. The device can adapt to battery cells of different sizes and types, has high test accuracy, can display the test voltage in real time, and can give an alarm when exceeding the preset threshold, ensuring that unqualified battery cells can be screened out in time, thereby reducing the risk of manual intervention and misjudgment and lowering the production cost. At the same time, the overall design of the device is compact, easy to install and maintain, has good applicability and practicability, can be widely applied to the production and detection links of lithium-ion batteries, and improves the safety performance and quality control level of products. Description of the Drawings

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0022] Figure 1 Structural schematic diagram of Embodiment 1 of the present invention;

[0023] Figure 2 Structural schematic diagram of Embodiment 2 of the present invention;

[0024] Explanation of reference numerals:

[0025] 3. Display screen; 2. Electric box; 4. Cylinder; 5. Cross bar; 6. Spring test block; 9. Auxiliary connecting rod; 8. Front bumper and side bumper; 10. Bottom plate; 11. Electric core; 12. Pneumatic switch; 13. Power supply; 1. Reset button; 7. Piercing device. Detailed implementation manners

[0026] All features disclosed in this specification, or all steps in the disclosed methods or processes, except for mutually exclusive features and / or steps, can be combined in any manner.

[0027] Any feature disclosed in this specification (including any additional claims, abstract, and drawings), unless specifically stated, can be replaced by other equivalent or similar-purpose alternative features. That is, unless specifically stated, each feature is only an example of a series of equivalent or similar features. Embodiment

[0028] As Figure 1 shown, a side voltage testing device for a polymer soft-pack lithium-ion battery of the present invention includes:

[0029] A support structure for supporting and accommodating the testing components;

[0030] A driving device for driving the testing components to perform voltage testing; and

[0031] Testing components, including at least one positive testing block and one negative testing block, which are used to contact the positive and negative electrode tabs of the battery; and

[0032] A display device for displaying the voltage testing results and providing an alarm function.

[0033] Among them, the support structure is the electric box 2, which internally accommodates the cylinder 4, circuits, and air pipes.

[0034] The driving device is a cylinder 4, and the cylinder 4 is installed on the electrical box 2. The cylinder 4 drives the test assembly to move in the vertical direction.

[0035] A cross bar 5 is installed at the output end of the cylinder 4, and the test assembly is installed on the cross bar 5. The test assembly is a spring test block 6, and the spring test block 6 is aligned with the positive electrode tab and the negative electrode tab of the battery cell 11, and the spring test block 6 is driven by the cylinder 4 to contact and test the positive electrode tab and the negative electrode tab.

[0036] For the battery cell 11 with positive and negative electrode tabs on both sides, an auxiliary connecting rod 9 is also installed on the cross bar 5. At this time, a spring test block 6 is installed on the cross bar 5, and another spring test block 6 is installed on the auxiliary connecting rod 9, which are used to align the positive and negative electrode tabs on both sides respectively.

[0037] It also includes a front bumper and a side bumper 8, which are fixed on the test platform for positioning the battery cell 11 to be tested; it also includes a bottom plate 10, and the bottom plate 10 is used to support the battery cell 11; it also includes an externally connected pneumatic switch 12 and a power supply 13 arranged on the electrical box 2. The display device is a display screen 3, and two of them are provided.

[0038] In this embodiment, a reset button 1 is also arranged on the electrical box 2.

[0039] Among them, a piercing device 7 is also arranged in the support structure. The piercing device 7 moves upward to pierce the edge of the aluminum-plastic film of the battery cell. The piercing device includes a bayonet and a piercing cylinder. The bayonet is installed at the top of the piercing device and is used to pierce the edge position of the aluminum-plastic film.

[0040] During the test, the operator first places the battery cell to be tested on the bottom plate of the device. The bottom plate provides support and positions the battery cell. The front bumper and the side bumper are fixed on the test platform to further position the battery cell and ensure that the battery cell remains stable during the test.

[0041] According to the structure of the battery cell (single-sided electrode tab or double-sided electrode tabs), adjust the position of the auxiliary connecting rod. If the battery cell with double-sided electrode tabs is tested, disassemble the auxiliary connecting rod and install the spring test block at the corresponding position on the cross bar to ensure that the positive and negative test blocks can accurately contact the positive and negative electrode tabs of the battery cell.

[0042] The operator starts the device by turning on the power supply. The display screen turns on and displays the status of the device. At the same time, the pneumatic switch activates the cylinder of the device. The operator can also adjust the voltage alarm threshold through the display screen. After setting, the test starts.

[0043] The cylinder drives the cross bar, so that the positive and negative spring test blocks installed on the cross bar move downward and contact the positive and negative electrode tabs of the battery cell. During this process, the spring test block can be adjusted adaptively according to the size of the battery cell to ensure good contact.

[0044] While the voltage test is being conducted, another cylinder inside the box is activated to drive the bayonet upward to pierce the edge of the aluminum-plastic film of the battery cell to ensure the accuracy of the test.

[0045] During the test, the display screen shows the positive and negative voltages of the battery cell in real time. If the detected voltage exceeds the preset alarm threshold, the display screen will light up red and the buzzer will sound an alarm, indicating that the battery cell is unqualified. At this time, the operator can press the reset button to cancel the alarm signal and record the test results.

[0046] After the test is completed, the operator can easily remove the battery cell through the bottom plate and side bar and prepare for the next battery cell test. Example

[0047] The structure of this embodiment 1 is basically the same as that of embodiment 1, and the working principle is also the same, except that the positive and negative electrodes of the test cell are on the same side, such as Figure 2 As shown, at this time, the auxiliary connecting rod is not used, and two spring test blocks 6 are directly installed on the cross bar, and the positive and negative electrodes at the bottom are aligned for testing.

[0048] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that are not conceived through creative work should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope defined in the claims.

Claims

1. A side voltage testing device for polymer soft-pack lithium-ion batteries, characterized in that, Comprising: A support structure for supporting and accommodating a test component; A driving device for driving the test component to perform a voltage test; And A test component, including at least one positive test block and one negative test block, the test blocks being used to contact the positive and negative tabs of the battery; and A display device for displaying the voltage test result and providing an alarm function.

2. The polymer soft-pack lithium-ion battery edge voltage testing device according to claim 1, wherein: The support structure is an electrical wooden box, which internally accommodates a cylinder, wires and air pipes.

3. The polymer soft-pack lithium-ion battery edge voltage testing device according to claim 1, wherein: The driving device is a cylinder, the cylinder is installed on the electrical wooden box, and the cylinder drives the test component to move in the vertical direction.

4. The polymer soft-pack lithium ion battery edge voltage testing device according to claim 3, characterized in that: A cross bar is installed at the output end of the cylinder, and the test component is installed on the cross bar. The test component is a spring test block, and the spring test block is aligned with the positive tab and the negative tab of the battery cell, and the spring test block is driven by the cylinder to contact the positive tab and the negative tab for testing.

5. The polymer soft-pack lithium-ion battery edge voltage testing device according to claim 4, characterized in that: When testing a battery cell with positive and negative tabs on the same side, two spring test blocks are installed on the cross bar, and the two spring test blocks are respectively aligned with the positive and negative tabs on the same side; When testing a battery cell with positive and negative tabs on two sides, an auxiliary connecting rod is further installed on the cross bar. At this time, one spring test block is installed on the cross bar, and another spring test block is installed on the auxiliary connecting rod, which are used to respectively align the positive and negative tabs on the two sides.

6. The polymer soft-pack lithium-ion battery edge voltage testing device according to claim 1, characterized in that: It further includes a front bumper and a side bumper, which are fixed on the test platform and used to position the battery cell to be tested.

7. The polymer soft-pack lithium-ion battery edge voltage testing device according to claim 1, characterized in that: It further includes a bottom plate, and the bottom plate is used to hold the battery cell.

8. The edge voltage testing device for polymer soft-pack lithium-ion batteries according to claim 1, characterized in that: It further includes an externally connected pneumatic switch and a power supply arranged on the electrical wooden box. The display device is a display screen, and two are provided.

9. The edge voltage testing device for polymer soft-pack lithium-ion batteries according to claim 2, wherein: A reset button is further arranged on the electrical wooden box.

10. The polymer soft-pack lithium-ion battery edge voltage testing device according to claim 2, characterized in that: A puncturing device is further arranged in the support structure, and the puncturing device moves upward to pierce the edge of the aluminum-plastic film of the battery cell.

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