Tab short circuit test mechanism
By using an elastic guide structure to assist the compression of the electrode ear in lithium battery production, controllable pressure testing of the electrode ear is achieved, solving the problem of damage to the electrode ear, improving production efficiency and maintenance convenience, and reducing equipment maintenance costs.
Patent Information
- Application Number
- CN202420086000.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-12
- Publication Date
- 2024-12-17
- Estimated Expiration
- 2034-01-12
AI Technical Summary
During the production process of lithium batteries, the extreme ears are easily damaged due to uncontrollable pressure during battery cells, resulting in a decrease in yield.
A polar ear short circuit testing mechanism is designed, using an elastic guide structure to assist the polar ear press to press the electrode ear, and the polar ear test is carried out through the controllable tension of the spring to avoid squeezing and damage, and short circuit is performed while the hot piezoelectric core is test.
It effectively avoids the risk of damage to the extreme ear, improves production efficiency and maintenance convenience, reduces equipment maintenance costs, and only needs to replace the spring to achieve pressure control.
Smart Images
Figure CN222189338U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of lithium battery production, in particular to a tab short-circuit testing mechanism. Background Art
[0002] Soft-pack lithium batteries are also called polymer batteries. Compared with lithium-ion batteries, soft-pack lithium batteries have many advantages such as small size, light weight, high specific energy, high safety, and flexible design.
[0003] During the production process of soft-pack lithium batteries, the cells must be short-circuited to maintain the yield of the battery. At present, when the cells are short-circuited, the upper hot pressing plate is driven by the driving structure to press the cells on the lower hot pressing plate. However, this structure cannot ensure that the tabs are pressed tightly when pressing the cells, and the pressure is uncontrollable, resulting in damage to the tabs due to squeezing. Utility Model Content
[0004] The main purpose of the utility model is to provide a tab short-circuit testing mechanism to solve the above technical problems and to prevent the tab from being damaged due to extrusion.
[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:
[0006] A tab short-circuit testing mechanism includes a testing assembly and a clamping assembly, wherein the testing assembly is mounted on a lower heating plate, and the clamping assembly is mounted on an upper heating plate. The clamping assembly includes a clamping and fixing block, a tab pressing block, and an elastic guiding structure. The clamping and fixing block is mounted on the upper heating plate, and the elastic guiding structure is mounted in the clamping and fixing block, and the tab pressing block is connected to the elastic guiding structure.
[0007] As a preferred technical solution, the elastic guiding structure includes a guide rod, a linear bearing, a spring and a connecting plate. The linear bearing is installed on the clamping and fixing block, the guide rod is inserted into the linear bearing, and one end of the guide rod is fixed on the connecting plate, and the other end is fixed on the tab pressure block. One end of the spring is installed on the connecting plate, and the other end is installed on the clamping and fixing block.
[0008] As a preferred technical solution, the elastic guiding structure further includes an elastic pin, which is inserted into the connecting plate and the clamping and fixing block and connected to the end of the spring.
[0009] As a preferred technical solution, the elastic guide structure further includes a heat insulation seat, and the heat insulation seat is sleeved on the guide rod and is in close contact with the linear bearing.
[0010] As a preferred technical solution, the elastic guiding structure further includes a limit block, and the limit block is sleeved on the guide rod and close to the connecting plate.
[0011] As a preferred technical solution, the elastic guiding structure further includes a shaft retaining spring, and the shaft retaining spring is clamped on the guide rod.
[0012] As a preferred technical solution, the test assembly includes a test fixing block and a short-circuit test block, the test fixing block is installed on the lower heating plate, and the short-circuit test block is installed on the upper end surface of the test fixing block.
[0013] As a preferred technical solution, the test assembly further includes a baffle, and the baffle is installed on both side surfaces of the test fixing block.
[0014] The beneficial effect of the utility model is that the above-mentioned tab short-circuit test mechanism adopts an elastic guiding structure to assist the tab pressing block to press the tab, and then performs a short-circuit test, so that the tab is compressed under the action of the spring, and the tension of the spring can be controlled according to the spring coefficient, so the tab pressure is controllable, avoiding the risk of the tab being damaged due to squeezing, and the short-circuit test of the pole piece can be performed while the hot pressing battery cell is being performed, thereby improving production efficiency and facilitating maintenance. Only the spring needs to be replaced, thereby reducing equipment maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 The utility model relates to a tab short-circuit testing mechanism. DETAILED DESCRIPTION
[0016] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.
[0017] like Figure 1 As shown, a tab short-circuit test mechanism includes a test component 2 and a clamping component 1. The test component 2 is installed on the lower heating plate b, and the clamping component 1 is installed on the upper heating plate a. The battery cell is placed on the lower heating plate b. The external driving structure drives the upper heating plate a to move toward the lower heating plate b, thereby clamping the battery cell for hot pressing. At the same time, the clamping component 1 presses the battery cell tab onto the test component 2, and the test component 2 performs a short-circuit test on the battery cell tab.
[0018] Specifically, the clamping assembly 1 includes a clamping and fixing block 11, a tab pressing block 12 and an elastic guide structure 13. The clamping and fixing block 11 is installed on the upper heating plate a, and the elastic guide structure 12 is installed in the clamping and fixing block 11. The tab pressing block 13 is connected to the elastic guide structure 11. The elastic guide structure 11 includes a guide rod 131, a linear bearing 139, a spring 133, a connecting plate 132, a first elastic pin 134, a second elastic pin 135, a heat insulation seat 138, a limit block 136 and a shaft retaining spring 137. The linear bearing 139 is installed on the clamping and fixing block 11, and the guide rod 131 is inserted into the linear bearing 139, and one end of the guide rod 131 is fixed on the connecting plate 132, and the other end is fixed on the tab pressing block 12. The first elastic pin 134 is inserted into the connecting plate 132, and the second elastic pin 135 is inserted into the connecting plate 138. The pin 135 is inserted into the clamping and fixing block 11, one end of the spring 133 is connected to the first elastic pin 134, and the other end is connected to the second elastic pin 135. The heat insulation seat 138 is sleeved on the guide rod 131 and is close to the linear bearing 139, which is used to isolate the heat emitted from the upper heating plate a. The limit block 136 is sleeved on the guide rod 131 and is close to the connecting plate 132, which is used to limit the lower limit of the movement of the connecting plate 132. The shaft retaining spring 137 is clamped on the guide rod 131 to limit the upper limit of the movement of the guide rod 131.
[0019] Specifically, the test assembly 2 includes a test fixing block 21, a short-circuit test block 22 and a baffle 23. The test fixing block 21 is installed on the lower heating plate b, and the short-circuit test block 22 is installed on the upper end surface of the test fixing block 21. The short-circuit test block 22 is energized to perform a short-circuit test. The baffle 23 is installed on both side surfaces of the test fixing block 21 for insulation to prevent operators from accidentally touching and getting electric shock.
[0020] The above-described embodiments are only preferred examples of the present invention and are not intended to limit the scope of implementation of the present invention. Therefore, any equivalent changes or modifications made based on the structures, features and principles described in the patent application scope of the present invention should be included in the scope of the patent application of the present invention.
Claims
1. A tab short circuit testing mechanism, characterized in that: It includes a test assembly and a clamping assembly, the test assembly is installed on the lower heating plate, the clamping assembly is installed on the upper heating plate, the clamping assembly includes a clamping fixed block, a tab pressure block and an elastic guide structure, the clamping fixed block is installed on the upper heating plate, the elastic guide structure is installed in the clamping fixed block, and the tab pressure block is connected to the elastic guide structure.
2. The tab short circuit testing mechanism according to claim 1, characterized in that: The elastic guide structure includes a guide rod, a linear bearing, a spring and a connecting plate. The linear bearing is installed on the clamping and fixing block. The guide rod is inserted into the linear bearing, and one end of the guide rod is fixed on the connecting plate, and the other end is fixed on the tab pressure block. One end of the spring is installed on the connecting plate, and the other end is installed on the clamping and fixing block.
3. The tab short circuit testing mechanism according to claim 2, characterized in that: The elastic guide structure further includes an elastic pin, which is inserted into the connecting plate and the pressing and fixing block and connected to the end of the spring.
4. The tab short circuit testing mechanism according to claim 2, characterized in that: The elastic guide structure further includes a heat insulation seat, which is sleeved on the guide rod and closely attached to the linear bearing.
5. The tab short circuit testing mechanism according to claim 2, characterized in that: The elastic guide structure further includes a limiting block, which is sleeved on the guide rod and close to the connecting plate.
6. The tab short circuit testing mechanism according to claim 2, characterized in that: The elastic guide structure further includes a shaft retaining spring, which is clamped on the guide rod.
7. The tab short circuit testing mechanism according to any one of claims 2 to 6, characterized in that: The test assembly includes a test fixing block and a short-circuit test block. The test fixing block is installed on the lower heating plate, and the short-circuit test block is installed on the upper end surface of the test fixing block.
8. The tab short circuit testing mechanism according to claim 7, characterized in that: The test assembly further includes a baffle, which is installed on both side surfaces of the test fixing block.