Tool for testing thickness of soft package battery cell

Abstract

The utility model discloses a tool for testing the thickness of a soft package battery cell, which comprises a base, a lifting adjusting mechanism, a sliding table, a mounting seat and two digital display dial indicators are arranged on the base, the lifting adjusting mechanism is connected with the sliding table and is used for controlling the sliding table to move up and down, and the mounting seat is connected with the digital display dial indicators. The sliding table is connected with the mounting seat and is used for controlling the mounting seat to move left and right, the mounting seat is provided with a clamp and a vertically placed soft package battery cell, the clamp is used for clamping a tab of the soft package battery cell, and the two digital dial indicators are symmetrically distributed on the front side and the rear side of the soft package battery cell front and back; the device has the advantage that the absolute thickness of the soft package battery cell can be detected.

Description

Technical Field

[0001] This utility model belongs to the field of battery testing technology, and in particular relates to a tooling for testing the thickness of soft-pack battery cells. Background Technology

[0002] Pouch cells use flexible materials (such as aluminum-plastic composite films) as their outer shell. Due to their lightweight, bendable properties and high energy density, they are widely used in mobile devices, electric vehicles, and energy storage systems. The structure of a pouch cell typically includes a positive electrode material, a negative electrode material, an electrolyte, and a separator, all encapsulated within a pouch shell. During production, controlling the thickness of the pouch cell is a crucial process parameter that directly affects battery performance, lifespan, and safety. It is usually tested using a pouch cell thickness testing device.

[0003] An existing device for testing the thickness of a pouch cell, disclosed in application number CN2021212914220, includes a digital dial indicator, a placement plate, a pressure plate, a mounting plate, and two fixing posts. The two fixing posts are respectively positioned on opposite sides of the placement plate. The pressure plate is vertically movable above the placement plate. The mounting plate is spaced above the pressure plate, with both ends fixed to the two fixing posts. The digital dial indicator is vertically mounted on the mounting plate. This technical solution uses the placement plate and pressure plate to bond the pouch cell, and then reads the thickness of the pouch cell using the digital dial indicator. It has a simple structure and is highly operable.

[0004] Since both sides of the pouch cell are uneven, the placement plate and pressure plate are difficult to fit completely with the surface of the pouch cell. Therefore, the above-mentioned testing device can only detect the maximum thickness between the two sides of the pouch cell, and cannot detect the absolute thickness of the pouch cell. Therefore, there is still room for improvement. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a tooling for testing the thickness of pouch cells, which can detect the absolute thickness of pouch cells.

[0006] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: a tooling for testing the thickness of a soft-pack battery cell, including a base, on which a lifting adjustment mechanism, a slide, a mounting base and two digital dial indicators are provided. The lifting adjustment mechanism is connected to the slide and is used to control the slide to move up and down. The slide is connected to the mounting base and is used to control the mounting base to move left and right. The mounting base is provided with a clamp and a vertically placed soft-pack battery cell. The clamp is used to hold the tabs of the soft-pack battery cell. The two digital dial indicators are symmetrically distributed on the front and back sides of the soft-pack battery cell.

[0007] Preferably, the lifting and adjusting mechanism includes a first base plate, a top plate, a drive mechanism, two outer arms, and two inner arms. A first fixed block and a first slider capable of sliding left and right are provided on the upper surface of the first base plate. A second fixed block and a second slider capable of sliding left and right are provided on the lower surface of the top plate. The two outer arms and two inner arms correspond one-to-one and are arranged in a cross configuration. The middle portion of each outer arm is axially connected to the middle portion of the corresponding inner arm. The lower end of each outer arm is axially connected to the first slider. The upper end of each outer arm is axially connected to the second fixed block. The lower end of each inner arm is axially connected to the first fixed block. The upper end of each inner arm is axially connected to the second slider. The drive mechanism is used to drive the first slider to slide left and right. The sliding platform is located on the upper surface of the top plate.

[0008] Preferably, the upper surface of the first base plate is provided with a first slide rail extending in the left-right direction, and the first slider is slidably engaged with the first slide rail; the lower surface of the top plate is provided with a second slide rail extending in the left-right direction, and the second slider is slidably engaged with the second slide rail.

[0009] Preferably, the driving mechanism includes a third fixing block and a first screw. The third fixing block is fixedly mounted on the first base plate and has a first screw hole. One end of the first screw passes through the first screw hole and rotates with the first slider. The other end of the first screw has a first handle.

[0010] Preferably, the slide includes a second base plate, a third slider, and a second screw. Two side plates symmetrically distributed on the second base plate are fixedly disposed on the second base plate. Shaft holes are provided on the side plates. A second screw hole is provided on the third slider. One end of the second screw passes through one shaft hole and the second screw hole and extends into the other shaft hole. A second handle is provided at the other end of the second screw. The mounting base is fixedly disposed on the upper surface of the third slider.

[0011] Preferably, the upper surface of the second base plate is provided with a guide rail extending in the left-right direction, the front side of the second base plate is provided with a scale bar extending in the left-right direction, the lower end of the mounting base is fixedly provided with a guide block that slides with the guide rail, and the front side of the guide block is provided with an arrow pointing to the scale bar.

[0012] Preferably, the clamp includes a column, and a strip groove is provided on the side of the column facing the soft-pack battery cell. The strip groove extends in the vertical direction, and foam is attached to the inner wall of the strip groove.

[0013] Preferably, there are two clamps, which are symmetrically distributed from left to right.

[0014] Preferably, the mounting base is provided with two limiting strips distributed in the front-to-back direction, the limiting strips extend in the left-to-right direction, and a limiting groove is formed between the two limiting strips, with part of the soft-pack battery cell extending into the limiting groove and abutting against the limiting strip.

[0015] Preferably, the base is provided with two support columns, and the two support columns correspond one-to-one with the two digital micrometers, with the digital micrometers being set at the top of the corresponding support columns.

[0016] Compared with the prior art, the advantages of this utility model are:

[0017] 1. By placing the pouch cell vertically on the mounting base and using two digital dial indicators symmetrically arranged, the thickness of both sides of the pouch cell can be detected simultaneously, thereby achieving the measurement of the absolute thickness of the pouch cell and improving the accuracy of the test.

[0018] 2. By setting up a lifting adjustment mechanism and a slide, users can accurately adjust the position and measurement points of the pouch cell, enabling the digital dial indicator to perform accurate measurements at different points on the pouch cell, which helps to ensure the reliability of the measurement results.

[0019] 3. The tooling structure is simple and compact, and through the cooperation of the lifting and adjusting mechanism and the slide table, the tooling can be flexibly adjusted to adapt to different types and sizes of soft-pack battery cells, thus improving the overall convenience and adaptability of use. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the present invention. Figure 1 ;

[0021] Figure 2 This is a schematic diagram of the structure of the present invention. Figure 2 ;

[0022] Figure 3 This is a partial side view diagram of the present invention;

[0023] Figure 4 This is a partial top view of the structure of this utility model.

[0024] In the diagram: 1. Base; 11. Support column; 2. Lifting and adjusting mechanism; 21. First base plate; 211. First fixing block; 212. First slider; 213. First slide rail; 22. Top plate; 221. Second fixing block; 222. Second slider; 223. Second slide rail; 23. Drive mechanism; 231. Third fixing block; 232. First screw; 233. First handle; 24. Outer arm; 25. Inner arm; 3. Slide table; 31. Second base plate; 32. Third slider; 33. Second screw; 34. Side plate; 35. Second handle; 36. Guide rail; 4. Mounting seat; 41. Clamp; 411. Strip groove; 42. Limiting strip; 43. Guide block; 431. Arrow; 5. Digital display dial indicator; 6. Soft-pack battery cell; 61. Electrode. Detailed Implementation

[0025] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0026] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0027] Example 1: As Figure 1 and Figure 2 As shown, a fixture for testing the thickness of a pouch cell includes a base 1. The base 1 is provided with a lifting adjustment mechanism 2, a slide 3, a mounting base 4, and two digital micrometers 5. The lifting adjustment mechanism 2 is connected to the slide 3 and is used to control the slide 3 to move up and down. The slide 3 is connected to the mounting base 4 and is used to control the mounting base 4 to move left and right. The mounting base 4 is provided with a clamp 41 and a vertically placed pouch cell 6. The clamp 41 is used to clamp the tabs 61 of the pouch cell 6. The two digital micrometers 5 are symmetrically distributed on the front and back sides of the pouch cell 6.

[0028] In this embodiment, the mounting base 4 is provided with two limiting strips 42 distributed in the front-to-back direction. The limiting strips 42 extend in the left-to-right direction, and a limiting groove is formed between the two limiting strips 42. Part of the soft-pack battery cell 6 extends into the limiting groove and abuts against the limiting strip 42. This structure design helps to improve the limiting stability of the soft-pack battery cell 6, keep the soft-pack battery cell 6 in a vertical state, and help to improve the accuracy of detection.

[0029] In this embodiment, two support columns 11 are provided on the base 1, and the two support columns 11 correspond one-to-one with two digital micrometers 5. The digital micrometers 5 are set at the top of the corresponding support columns 11.

[0030] Example 2: Figure 2 and Figure 3 As shown, the rest of the components are the same as in Embodiment 1, except that the lifting adjustment mechanism 2 includes a first base plate 21, a top plate 22, a drive mechanism 23, two outer arms 24, and two inner arms 25. A first fixing block 211 and a first slider 212 that can slide left and right are provided on the upper surface of the first base plate 21. A second fixing block 221 and a second slider 222 that can slide left and right are provided on the lower surface of the top plate 22. The two outer arms 24 and the two inner arms 25 are arranged in a one-to-one correspondence and cross arrangement. The middle part of the outer arm 24 is axially connected to the middle part of the corresponding inner arm 25. The lower end of the outer arm 24 is axially connected to the first slider 212. The upper end of the outer arm 24 is axially connected to the second fixing block 221. The lower end of the inner arm 25 is axially connected to the first fixing block 211. The upper end of the inner arm 25 is axially connected to the second slider 222. The drive mechanism 23 is used to drive the first slider 212 to slide left and right. The slide table 3 is provided on the upper surface of the top plate 22.

[0031] Example 3: Figure 2 and Figure 3 As shown, the rest of the parts are the same as in Embodiment 2. The difference is that a first slide rail 213 extending in the left and right direction is provided on the upper surface of the first base plate 21, and the first slider 212 slides in cooperation with the first slide rail 213. A second slide rail 223 extending in the left and right direction is provided on the lower surface of the top plate 22, and the second slider 222 slides in cooperation with the second slide rail 223. This structural design helps to improve the stability of the structure.

[0032] In this embodiment, the drive mechanism 23 includes a third fixing block 231 and a first screw 232. The third fixing block 231 is fixedly mounted on the first base plate 21 and has a first screw hole (not shown in the figure). One end of the first screw 232 passes through the first screw hole and rotates with the first slider 212. The other end of the first screw 232 has a first handle 233. The user rotates the first screw 232 using the first handle 233 to adjust the position of the first slider 212, thereby changing the angle between the outer arm 24 and the inner arm 25 and adjusting the height of the top plate 22.

[0033] Example 4: Figure 1 and Figure 2As shown, the rest of the components are the same as in Embodiment 1, except that the slide 3 includes a second base plate 31, a third slider 32, and a second screw 33. Two side plates 34, symmetrically distributed, are fixedly mounted on the second base plate 31. The side plates 34 have shaft holes. The third slider 32 has a second screw hole (not shown in the figure). One end of the second screw 33 passes through one shaft hole and the second screw hole, then extends into the other shaft hole. The other end of the second screw 33 has a second handle 35. The mounting base 4 is fixedly mounted on the upper surface of the third slider 32. The user can adjust the position of the third slider 32 and the mounting base 4 by rotating the second screw 33 using the second handle 35.

[0034] In this embodiment, the upper surface of the second base plate 31 is provided with a guide rail 36 extending in the left-right direction, and the front side of the second base plate 31 is provided with a scale bar extending in the left-right direction. The lower end of the mounting base 4 is fixedly provided with a guide block 43 that slides with the guide rail 36, and the front side of the guide block 43 is provided with an arrow 431 pointing to the scale bar. In this structure, the cooperation between the guide rail 36 and the guide block 43 helps to improve the stability of the structure, and the arrow 431 and the scale bar make it easy for the user to confirm the left and right movement amount so as to quickly find the required point.

[0035] Example 5: Figure 4 As shown, the rest is the same as in Embodiment 1, except that the clamp 41 includes a column with a strip groove 411 on the side facing the soft-pack battery cell 6. The strip groove 411 extends in the vertical direction, and foam (not shown in the figure) is attached to the inner wall of the strip groove 411 to prevent scratching between the strip groove 411 and the tab 61 of the soft-pack battery cell 6. Furthermore, two clamps 41 are provided, which are symmetrically distributed from left to right to accommodate different types of soft-pack battery cells 6.

[0036] The brief usage process of this technical solution is as follows:

[0037] First, zero the digital micrometer 5. Then, place the soft-pack battery cell 6 vertically on the mounting base 4. Clamp the tabs 61 of the soft-pack battery cell 6 with the clamp 41 and use the limit strip 42 to keep the soft-pack battery cell 6 vertical. Since the soft-pack battery cell 6 is now located between the two digital micrometers 5, the digital micrometers 5 will collect values. The sum of the values ​​collected by the two digital micrometers 5 is recorded as the absolute thickness of the soft-pack battery cell 6 at that point. Adjust the position of the soft-pack battery cell 6 in the vertical plane by using the lifting adjustment mechanism 2 and the slide table 3 to test different points of the soft-pack battery cell 6. After the test is completed, remove the soft-pack battery cell 6.

[0038] It should be noted that during the testing process, it is preferable to test three values ​​at each point and take the average value.

[0039] The present invention has been described above by way of example with reference to the accompanying drawings. Obviously, the implementation of the present invention is not limited to the above-described manner. Any improvements made by adopting the inventive concept and technical solution of the present invention, or the direct application of the inventive concept and technical solution of the present invention to other occasions without modification, are all within the protection scope of the present invention.

Claims

1. A fixture for testing the thickness of pouch cells, comprising a base (1), characterized in that: The base (1) is provided with a lifting adjustment mechanism (2), a slide (3), a mounting base (4) and two digital micrometers (5). The lifting adjustment mechanism (2) is connected to the slide (3) and is used to control the slide (3) to move up and down. The slide (3) is connected to the mounting base (4) and is used to control the mounting base (4) to move left and right. The mounting base (4) is provided with a clamp (41) and a vertically placed soft-pack battery cell (6). The clamp (41) is used to clamp the tabs (61) of the soft-pack battery cell (6). The two digital micrometers (5) are symmetrically distributed on the front and back sides of the soft-pack battery cell (6).

2. The fixture for testing the thickness of a pouch cell according to claim 1, characterized in that: The lifting and adjusting mechanism (2) includes a first base plate (21), a top plate (22), a drive mechanism (23), two outer arms (24), and two inner arms (25). A first fixing block (211) and a first sliding block (212) capable of sliding left and right are provided on the upper surface of the first base plate (21). A second fixing block (221) and a second sliding block (222) capable of sliding left and right are provided on the lower surface of the top plate (22). The two outer arms (24) and the two inner arms (25) correspond one-to-one and are arranged in a cross configuration. The middle of the outer arm (24)... The inner arm (25) is axially connected to the middle part of the corresponding inner arm (25), the lower end of the outer arm (24) is axially connected to the first slider (212), the upper end of the outer arm (24) is axially connected to the second fixing block (221), the lower end of the inner arm (25) is axially connected to the first fixing block (211), the upper end of the inner arm (25) is axially connected to the second slider (222), the driving mechanism (23) is used to drive the first slider (212) to slide left and right, and the slide table (3) is disposed on the upper surface of the top plate (22).

3. The tooling for testing the thickness of a pouch cell according to claim 2, characterized in that: The upper surface of the first base plate (21) is provided with a first slide rail (213) extending in the left and right direction, and the first slider (212) slides in cooperation with the first slide rail (213). The lower surface of the top plate (22) is provided with a second slide rail (223) extending in the left and right direction, and the second slider (222) slides in cooperation with the second slide rail (223).

4. The fixture for testing the thickness of a pouch cell according to claim 2, characterized in that: The driving mechanism (23) includes a third fixing block (231) and a first screw (232). The third fixing block (231) is fixedly mounted on the first base plate (21). The third fixing block (231) is provided with a first screw hole. One end of the first screw (232) passes through the first screw hole and rotates with the first slider (212). The other end of the first screw (232) is provided with a first handle (233).

5. The fixture for testing the thickness of a pouch cell according to claim 1, characterized in that: The slide (3) includes a second base plate (31), a third slider (32), and a second screw (33). Two side plates (34) are fixedly arranged on the second base plate (31) in a symmetrical arrangement. The side plates (34) are provided with shaft holes. The third slider (32) is provided with a second screw hole. One end of the second screw (33) passes through one shaft hole and the second screw hole and then extends into the other shaft hole. The other end of the second screw (33) is provided with a second handle (35). The mounting base (4) is fixedly arranged on the upper surface of the third slider (32).

6. The fixture for testing the thickness of a pouch cell according to claim 5, characterized in that: The upper surface of the second base plate (31) is provided with a guide rail (36) extending in the left and right direction. The front side of the second base plate (31) is provided with a scale bar extending in the left and right direction. The lower end of the mounting base (4) is fixedly provided with a guide block (43) that slides with the guide rail (36). The front side of the guide block (43) is provided with an arrow (431) pointing to the scale bar.

7. The fixture for testing the thickness of a pouch cell according to claim 1, characterized in that: The clamp (41) includes a column, and a strip groove (411) is provided on the side of the column facing the soft-pack battery cell (6). The strip groove (411) extends in the vertical direction, and foam is attached to the inner wall of the strip groove (411).

8. A tooling for testing the thickness of a pouch cell according to claim 1 or 7, characterized in that: There are two clamps (41), which are symmetrically distributed on the left and right.

9. The fixture for testing the thickness of a pouch cell according to claim 1, characterized in that: The mounting base (4) is provided with two limiting strips (42) distributed in the front-back direction. The limiting strips (42) extend in the left-right direction, and a limiting groove is formed between the two limiting strips (42). Part of the soft-pack battery cell (6) extends into the limiting groove and abuts against the limiting strip (42).

10. The tooling for testing the thickness of a pouch cell according to claim 1, characterized in that: The base (1) is provided with two support columns (11), and the two support columns (11) correspond one-to-one with the two digital micrometers (5). The digital micrometers (5) are set at the top of the corresponding support columns (11).

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