Short circuit test device for polymer soft package lithium battery stack core

Abstract

The utility model discloses a polymer soft package lithium battery stack core short circuit test device, comprising a test outer frame used for fixing the whole device; the laminated core pressing plate is mounted in the test outer frame, is driven by a cylinder to move up and down, and is used for pressing the laminated core in the test process; the air cylinder is fixed at the top of the testing outer frame and drives the laminated core pressing plate to move downwards so as to press the laminated core; and the bakelite handle is arranged on one side of the outer frame and is connected with the positive and negative copper sheets through conductive wires. According to the utility model, by designing the soft package lithium ion battery core stack short circuit test device, the test operation steps are simplified, and the production efficiency is obviously improved; the air cylinder drives the pressing plate to tightly press the stacked core, the stability of the stacked core in the testing process is ensured, and through the design of the bakelite handle and the spring probe, universality testing of two different types of battery cores with tabs at one end and tabs at two ends can be achieved, the replacement frequency of testing equipment is greatly reduced, and the production cost is reduced.

Description

Technical Field

[0001] The utility model relates to the field of battery testing, in particular to a polymer soft-pack lithium battery stacked core short-circuit testing device. Background Art

[0002] In the production of soft-pack lithium-ion batteries, testing the insulation performance of stacked cells is a critical step in ensuring battery safety and quality. Traditional methods for testing stacked cells for short circuits typically rely on manual testing, using red and black test leads to contact the positive and negative terminals of the cells one by one. This method has several drawbacks. First, the test leads have a small contact area and can easily pierce the cell tabs, resulting in inaccurate test results and potentially damaging the cell. Second, manual testing is cumbersome and inefficient, and the operator's experience directly affects test stability.

[0003] Furthermore, traditional testing devices often lack automation capabilities and are unable to perform short-circuit testing and discharge processing simultaneously during lamination, resulting in a complex testing process that is difficult to adapt to the needs of modern large-scale production. Therefore, there is an urgent need for a short-circuit testing device for soft-pack lithium battery stacks that simplifies operation, improves test accuracy, and combines automation and safety features to meet the industry's requirements for efficient, safe, and reliable battery production testing. Summary of the Invention

[0004] In order to solve the above problems, the utility model provides a polymer soft-pack lithium battery stacked core short-circuit test device, which can effectively solve the shortcomings of the existing technology.

[0005] The utility model is realized by the following technical scheme: a polymer soft-pack lithium battery stacked core short-circuit test device, comprising:

[0006] Test frame, used to fix the entire device;

[0007] The core stacking plate is installed in the test frame and is driven up and down by a cylinder to press the core stack during the test;

[0008] A cylinder is fixed on the top of the test outer frame and drives the core stack pressing plate to move downward to press the core stack;

[0009] The bakelite handle is installed on one side of the outer frame, connected to the positive and negative copper sheets through conductive wires, and connected to the positive and negative interfaces of the insulation resistance tester through conductive wires, used to test the battery cell with one end of the tab;

[0010] The insulation resistance tester is connected to the positive and negative copper plates on the bakelite handle via conductive wires. It is used to detect the insulation status of the stacked core and determine the short circuit condition through voltage adjustment and resistance display.

[0011] The spring probe test assembly is fixed at the bottom of the test frame. It contacts the positive and negative tabs of the stacked core and is used to test the battery cells with tabs at both ends.

[0012] As a preferred technical solution, bakelite positioning support plates are further provided on both sides of the test outer frame. The plates are provided at both ends of the test outer frame for positioning and supporting the head and tail of the stacked core and providing insulation function.

[0013] As a preferred technical solution, the spring needle test assembly includes:

[0014] The mounting block is fixed to the bottom of the test frame, and is equipped with a spring probe, which is connected to the insulation resistance tester through a conductive wire. The spring probe contacts the positive and negative tabs of the stacked core when the pressure plate is pressed down;

[0015] The spring probe is fixed by the mounting block and contacts the positive and negative tabs of the stacked core when the pressure plate is pressed down to perform a short circuit test.

[0016] As a preferred technical solution, it also includes a safety grating installed around the test frame and connected to the cylinder circuit. When a person approaches, the cylinder action is automatically stopped to prevent accidental pinching.

[0017] As a preferred technical solution, the stacked core includes a stacked core with one tab and a stacked core with two tabs.

[0018] As a preferred technical solution, the test outer frame is installed with guide columns, and the stacked core pressure plate guides are installed on multiple guide columns.

[0019] As a preferred technical solution, the positive and negative copper sheets are installed on the bakelite handle, and the positive and negative copper sheets are of different lengths.

[0020] The beneficial effects of the utility model are as follows: the utility model simplifies the test operation steps and significantly improves production efficiency by designing a soft-pack lithium-ion battery stack short-circuit test device; the cylinder drives the pressing plate to compress the stack, thereby ensuring the stability of the stack during the test; and the design of the bakelite handle and the spring probe can realize universal testing of two different types of battery cells, one with a single tab and one with two tabs, thereby greatly reducing the replacement frequency of the test equipment and lowering the production cost;

[0021] The device's safety light barrier is set in the operating area, which can automatically stop the cylinder action when it detects a person approaching, avoiding safety accidents such as hand pinching caused by misoperation and improving operational safety;

[0022] Compared with traditional testing methods, this utility model improves the accuracy and reliability of the test by increasing the contact area and optimizing the test structure, reduces the risk of defective products flowing out, and enhances the quality control capability of the production line;

[0023] In addition, the device can realize automatic discharge processing during short-circuit testing, which simplifies the operation process, reduces manual intervention, and further improves the overall production efficiency and product qualification rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0025] Figure 1 This is a schematic diagram of the front structure of the utility model;

[0026] Figure 2 This is a schematic diagram of the reverse structure of the utility model;

[0027] Description of reference numerals:

[0028] 1. Test frame; 2. Stacked core pressure plate; 3. Cylinder; 6. Bakelite handle; 7. Positive and negative copper sheets; 9. Insulation resistance tester; 10. Mounting block; 11. Spring probe; 4. Bakelite positioning support plate; 8. Safety grating; 5. Stacked core with tabs on one end; 12. Stacked core with tabs on both ends. DETAILED DESCRIPTION

[0029] All features disclosed in this specification, or all steps in the disclosed methods or processes, except mutually exclusive features and / or steps, can be combined in any manner.

[0030] Any feature disclosed in this specification (including any appended claims, abstract, and drawings), unless otherwise stated, may be replaced by other equivalent or similar features. In other words, unless otherwise stated, each feature is only an example of a series of equivalent or similar features.

[0031] like Figure 1 and Figure 2 As shown, a polymer soft-pack lithium battery stacked core short-circuit test device of the present invention includes a test outer frame 1 for fixing the entire device;

[0032] It also includes a core stacking plate 2, which is installed in the test outer frame 1 and is driven up and down by a cylinder 3 to press the core stack during the test;

[0033] and comprising a cylinder 3 fixed on the top of the test outer frame 1, driving the core stack pressing plate 2 to move downward to compress the core stack;

[0034] It also includes a bakelite handle 6, which is installed on one side of the outer frame, connected to the positive and negative copper sheets 7 through conductive wires, and connected to the positive and negative interfaces of the insulation resistance tester 9 through conductive wires, for testing a tab battery cell;

[0035] In order to realize the short circuit test, an insulation resistance tester 9 is also included, which is connected to the positive and negative copper sheets 7 on the bakelite handle 6 through a conductive wire, and is used to detect the insulation state of the stacked core and judge the short circuit condition through voltage adjustment and resistance display;

[0036] It also includes a spring probe 11 test component, which is fixed to the bottom of the test frame 1 and contacts the positive and negative tabs of the stacked core for testing the battery cells with tabs at both ends.

[0037] Among them, bakelite positioning support plates 4 are also provided on both sides of the test outer frame 1. They are arranged at both ends of the test outer frame 1 and are used to position and support the head and tail of the stacked core and provide insulation function.

[0038] Among them, the spring needle test assembly includes:

[0039] The mounting block 10 is fixed to the bottom of the test frame 1, and is equipped with a spring probe 11. The spring probe 11 is connected to the insulation resistance tester 9 through a conductive wire. The spring probe 11 contacts the positive and negative tabs of the stacked core when the pressure plate is pressed down.

[0040] The spring probe 11 is fixed by the mounting block 10 and contacts the positive and negative tabs of the stacked core when the pressing plate is pressed down to perform a short circuit test.

[0041] It also includes a safety grating 8, which is installed around the test frame 1 and is connected to the cylinder 3 circuit. When a person approaches, the cylinder 3 is automatically stopped to prevent accidental pinching.

[0042] In this embodiment, the core stack includes a one-end tab stack 5 and a two-end tab stack 12, which can meet the current industry's Hi-pot (insulated short circuit) test of soft-pack battery cell stacks with two different tab directions. Short-circuit testing and discharge processing can be performed while pressing, simplifying the test steps and improving the test accuracy, improving production efficiency and simplifying the structure, and also reducing production costs.

[0043] In order to make the core stacking plate 2 rise and fall more smoothly, in this embodiment, the test outer frame 1 is installed with guide columns, and the core stacking plate 2 is guided and installed on multiple guide columns.

[0044] Among them, the positive and negative copper sheets 7 are installed on the bakelite handle 6, and the positive and negative copper sheets 7 are of different lengths. The copper sheets are locked with conductive wires and connected to the insulation resistance tester 9. The buzzer of the insulation resistance tester 9 keeps beeping, indicating that the stacked core is short-circuited. If it beeps once or does not beep, it is a qualified product. After the qualified product is tested, a long copper sheet is used to contact the positive and negative ears of the stacked core at the same time for discharge.

[0045] The testing process is as follows:

[0046] First, start the power supply of the test device and select the corresponding test mode according to the type of core stack. If you need to test a core stack 5 with one end tab, place the core stack in the test outer frame 1 and adjust the bakelite handle 6 to contact the positive and negative tabs of the core stack. At this time, the cylinder 3 starts, driving the core stack pressure plate 2 to move downward, pressing the core stack to ensure stability during the test. The positive and negative copper sheets 7 on the handle are connected to the insulation resistance tester 9 through conductive wires. When the copper sheets are in contact with the positive and negative tabs of the core stack, the insulation resistance tester 9 starts to detect the insulation status of the battery cell. If the buzzer keeps beeping, it means that the core stack is short-circuited, otherwise it is a qualified product. After the test of qualified products is completed, use a long copper sheet to contact the positive and negative tabs of the core stack at the same time for discharge to ensure its safety.

[0047] If the test is for a stacked core (12) with tabs on both ends, the core is placed within the test frame (1) while adjusting the spring probe (11) test assembly. Cylinder (3) is activated, and as the pressure plate presses downward, the spring probe (11) automatically contacts the positive and negative tabs of the stacked core. At this point, the insulation resistance tester (9) is connected to the spring probe (11) and the copper sheet of the handheld handle via a conductive wire and performs the corresponding short-circuit test. If a short circuit is detected, a buzzer sounds an alarm signal, indicating that the stack has failed. For qualified products, a discharge process can also be performed after the test is complete.

[0048] During the test, the safety grating 8 monitors the situation in the operating area in real time. When it detects that an operator is approaching, it automatically stops the action of the cylinder 3 to prevent accidental pinching and ensure the safety of the operation.

[0049] The entire testing process is simple and efficient. The cylinder 3 drives the pressure plate to compress the core stack. Combined with the bakelite handle 6 and spring probe 11 test components, accurate testing of different types of soft-pack lithium battery core stacks is achieved, simplifying the testing steps, improving production efficiency, and ensuring operational safety.

[0050] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that do not require creative effort should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection defined in the claims.

Claims

1. A polymer soft-pack lithium battery stack short-circuit test device, characterized in that: include: A test frame (1) for fixing the entire device; A core stacking plate (2) is installed in the test outer frame (1) and is driven up and down by a cylinder (3) to press the core stack during the test; A cylinder (3) is fixed on the top of the test outer frame (1) and drives the core stacking pressing plate (2) to move downward to compress the core stacking; A bakelite handle (6) is mounted on one side of the outer frame, connected to the positive and negative copper sheets (7) via conductive wires, and connected to the positive and negative interfaces of an insulation resistance tester (9) via conductive wires, for testing a battery cell with one end tab; An insulation resistance tester (9) is connected to the positive and negative copper sheets (7) on the bakelite handle (6) via a conductive wire, and is used to detect the insulation state of the stacked core and determine the short circuit condition through voltage adjustment and resistance display; The spring probe (11) test assembly is fixed at the bottom of the test outer frame (1) and contacts the positive and negative tabs of the stacked core, and is used to test the battery cells with tabs at both ends.

2. The polymer soft-pack lithium battery stacked core short-circuit test device according to claim 1, characterized in that: Bakelite positioning support plates (4) are also provided on both sides of the test outer frame (1), which are arranged at both ends of the test outer frame (1) and are used to position and support the head and tail of the stacked core, while providing an insulation function.

3. The polymer soft-pack lithium battery stacked core short-circuit test device according to claim 1, characterized in that: The spring needle test assembly includes: A mounting block (10) is fixed to the bottom of the test outer frame (1), and a spring probe (11) is installed thereon, and is connected to the insulation resistance tester (9) via a conductive wire, wherein the spring probe (11) contacts the positive and negative tabs of the stacked core when the pressing plate is pressed down; The spring probe (11) is fixed by the mounting block (10) and contacts the positive and negative tabs of the stacked core when the pressing plate is pressed down to perform a short circuit test.

4. The polymer soft-pack lithium battery stacked core short-circuit test device according to claim 1, characterized in that: It also includes a safety grating (8) which is installed around the test outer frame (1) and is connected to the circuit of the cylinder (3). When a person approaches, the cylinder (3) is automatically stopped to prevent accidental pinching.

5. The polymer soft-pack lithium battery stacked core short-circuit test device according to claim 1, characterized in that: The stacked core comprises a stacked core with a single tab (5) and a stacked core with two tabs (12).

6. The polymer soft-pack lithium battery stacked core short-circuit test device according to claim 1, characterized in that: The test outer frame (1) is installed with guide columns, and the stacked core pressing plate (2) is guided and installed on a plurality of guide columns.

7. The polymer soft-pack lithium battery stacked core short-circuit test device according to claim 1, characterized in that: The positive and negative copper sheets (7) are mounted on the bakelite handle (6), and the positive and negative copper sheets (7) are of different lengths.

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