Tool and testing method

Abstract

The invention discloses a tool and a test method, the tool comprises a fixing assembly, a force application member and a locking member, the fixing assembly is provided with an accommodating cavity and an opening communicated with the accommodating cavity, the accommodating cavity is used for accommodating a battery cell, and the opening is used for allowing a chip of the battery cell to penetrate out of the accommodating cavity. The force application piece is provided with a connecting hole, one end of the force application piece is connected with the bar through the connecting hole, and the other end is connected with test equipment. The locking piece penetrates through the connecting hole and is rotationally connected with the force application piece, and the locking piece is used for clamping the bar together with the force application piece when the force application piece rotates to form a specified angle with the bar. The tool and the test method aim at solving the technical problem of how to simulate torsion borne by a pole under different use working conditions of a battery cell.

Description

Technical Field

[0001] The present invention relates to the technical field of batteries, and particularly to a tooling and a testing method. Background Art

[0002] In the research and development and application of battery technology, the mechanical properties of battery cells are crucial for the safety and reliability of batteries. The tabs and positive and negative electrode posts of the battery cells, as key components for connecting the battery to the external circuit, their stability directly affects the performance and safety of the battery.

[0003] Currently, most of the testing methods for positive and negative electrode posts focus on the electrical performance and temperature control of the battery, while the evaluation of the mechanical stability of the battery cells is relatively weak. The existing testing methods have not been able to accurately measure the torque boundary that the electrode posts of the battery cells can withstand during actual use, especially under the long-term expansion effect caused by multiple charge and discharge cycles of the battery, and cannot comprehensively simulate the long-term mechanical property changes of the electrode posts of the battery cells.

[0004] Therefore, there is an urgent need to develop a new testing method that can accurately determine the torque borne by the electrode posts of the battery cells under different usage conditions and its impact on the stability of the battery system. Summary of the Invention

[0005] An object of the present invention is to provide a tooling and a testing method, aiming to solve the technical problem of how to simulate the torque borne by the electrode posts of the battery cells under different usage conditions.

[0006] To achieve the above object, in a first aspect, a solution provided by the present invention is: a tooling, including a fixing component, a force-applying member, and a locking member. The fixing component is formed with a receiving cavity and an opening communicating with the receiving cavity. The receiving cavity is used to accommodate the battery cell, and the opening is used for the tab of the battery cell to pass through the receiving cavity. The force-applying member is provided with a connection hole. One end of the force-applying member is used to be connected to the tab through the connection hole, and the other end is used to be connected to the testing device. The locking member is inserted through the connection hole and rotatably connected to the force-applying member. The locking member is used to, when the force-applying member rotates to a specified angle with respect to the tab, jointly clamp the tab with the force-applying member.

[0007] Optionally, the locking member includes a pressing portion and a threaded portion. The threaded portion is inserted through the connection hole and connected to the force-applying member. The pressing portion is provided at one end of the threaded portion. The pressing portion and the force-applying member are used to clamp the tab.

[0008] Optionally, the locking member includes a limiting portion. The force-applying member is provided with a limiting groove communicating with the connection hole. The limiting portion is provided on the side of the pressing portion close to the threaded portion. The limiting portion is inserted into the limiting groove and abuts against the inner wall of the limiting groove.

[0009] Optionally, the force-applying member includes a first connecting portion and a second connecting portion. The connecting hole is formed in the first connecting portion. The second connecting portion is disposed at one end of the first connecting portion. In the direction approaching the second connecting portion, the width of at least a part of the first connecting portion gradually increases, and the width of the second connecting portion is greater than the width of the first connecting portion.

[0010] Optionally, the second connecting portion is provided with a positioning groove for clamping by a testing device.

[0011] Optionally, in the direction approaching the second connecting portion, the thickness of at least a part of the first connecting portion gradually increases. The positioning groove is formed at the end of the second connecting portion away from the first connecting portion, and the thickness of the second connecting portion between the positioning groove and the first connecting portion is greater than the thickness of the first connecting portion.

[0012] Optionally, the force-applying member is provided with anti-slip lines for increasing the friction between the force-applying member and the testing device.

[0013] Optionally, the fixing assembly includes a base body and a fixing member. The accommodating cavity and the opening are formed in the base body. The force-applying member and the fixing member are respectively disposed on opposite sides of the base body. The force-applying member protrudes from the base body, and the fixing member is used for connecting with the testing device.

[0014] Optionally, the fixing assembly includes a reinforcing member. One end of the reinforcing member is connected to the base body, and the other end is connected to the fixing member.

[0015] In a second aspect, the present invention provides a testing method, including: assembling the battery cell in the fixing assembly and connecting one of the tabs on the battery cell to the force-applying member;

[0016] The testing device respectively clamps the fixing assembly and the force-applying member, and performs a torsion test on the tab connected to the force-applying member.

[0017] The beneficial effects of the present invention are as follows:

[0018] A tooling includes a fixing assembly, a force-applying member, and a locking member. The fixing assembly is formed with an accommodating cavity and an opening communicating with the accommodating cavity. The accommodating cavity is used for accommodating the battery cell, and the opening is used for the tab of the battery cell to pass through the accommodating cavity. The force-applying member is provided with a connecting hole. One end of the force-applying member is used for connecting with the tab through the connecting hole, and the other end is used for connecting with the testing device. The locking member passes through the connecting hole and is rotatably connected to the force-applying member. The locking member is used for jointly clamping the tab with the force-applying member when the force-applying member rotates to a specified angle with respect to the tab.

[0019] In practical applications, first, the battery cell is assembled on the tooling so that both tabs of the battery cell pass through the accommodating cavity from the opening. Then, the force-applying member is connected to one of the tabs of the battery cell. After adjusting the angle between the force-applying member and the tab, the locking member and the force-applying member jointly clamp the tab. After that, the two clamps of the testing device are respectively clamped to the fixing component and the force-applying member, and finally, the torque test is carried out. The design of the force-applying member enables the user to adjust the angle between the force-applying member and the tab. By adjusting the angle, the torque conditions borne by the tab under different working conditions can be simulated. The precise angle adjustment enables the test to reflect the stress state of the battery cell under long-term use and different operating conditions, improving the simulation effect of the test process on the actual working conditions. Brief Description of the Drawings

[0020] In order 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 following-described drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0021] Figure 1 It is a schematic diagram of the overall structure provided by the embodiment of the present invention for showing the cooperation relationship between the testing device and the tooling;

[0022] Figure 2 It is a schematic diagram of the structure provided by the embodiment of the present invention for showing the cooperation relationship between the tooling and the battery cell;

[0023] Figure 3 It is a schematic diagram of the structure provided by the embodiment of the present invention for showing the fixing component;

[0024] Figure 4 It is a schematic diagram of the structure provided by the embodiment of the present invention for showing the locking member;

[0025] Figure 5 It is a schematic diagram of the structure provided by the embodiment of the present invention for showing the cooperation relationship between the locking member and the force-applying member;

[0026] Figure 6 It is a flowchart of the testing method provided by the embodiment of the present invention.

[0027] Explanation of the Reference Numerals in the Drawings:

[0028] 20. Fixing component; 21. Substrate; 211. Accommodating cavity; 212. Opening; 22. Fixing piece; 23. Reinforcing piece; 30. Force - applying piece; 31. First connecting part; 32. Second connecting part; 321. Positioning groove; 33. Connecting hole; 34. Limiting groove; 40. Anti - slip texture; 50. Locking piece; 51. Pressing part; 52. Threaded part; 53. Limiting part; 60. Battery cell; 61. Tab; 70. Testing device; 80. Width direction of the first connecting part; 90. Thickness direction of the first connecting part. Detailed implementation manners

[0029] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

[0030] Please refer to Figures 1 to 4 as shown in Figure 1 which is a schematic diagram of the overall structure provided by the embodiment of the present invention for showing the cooperation relationship between the testing device 70 and the tooling. Figure 2 which is a schematic diagram of the structure provided by the embodiment of the present invention for showing the cooperation relationship between the tooling and the battery cell 60. Figure 3 which is a schematic diagram of the structure provided by the embodiment of the present invention for showing the fixing component 20. Figure 4 which is a schematic diagram of the structure provided by the embodiment of the present invention for showing the locking piece 50.

[0031] In a first aspect, an embodiment of the present invention provides a tooling, including a fixing component 20, a force - applying piece 30 and a locking piece 50. The fixing component 20 is formed with an accommodating cavity 211 and an opening 212 communicating with the accommodating cavity 211. The accommodating cavity 211 is used for accommodating the battery cell 60, and the opening 212 is used for the tab 61 of the battery cell 60 to pass through the accommodating cavity 211. The force - applying piece 30 is provided with a connecting hole 33. One end of the force - applying piece 30 is used to connect with the tab 61 through the connecting hole 33, and the other end is used to connect with the testing device 70. The locking piece 50 is inserted through the connecting hole 33 and rotatably connected to the force - applying piece 30. The locking piece 50 is used to lock and clamp the tab 61 together with the force - applying piece 30 when the force - applying piece 30 rotates to a specified angle with respect to the tab 61.

[0032] In practical applications, first, the battery cell 60 is assembled to the tooling, such that both tab pieces 61 of the battery cell 60 pass through the accommodating cavity 211 from the opening 212. Then, the force - applying member 30 is connected to one of the tab pieces 61 of the battery cell 60. After adjusting the angle between the force - applying member 30 and the tab piece 61, the locking member 50 and the force - applying member 30 jointly clamp the tab piece 61. After that, the two clamps of the testing device 70 respectively clamp the fixing assembly 20 and the force - applying member 30, and finally, a torque test is performed. The design of the force - applying member 30 enables the user to adjust the angle between the force - applying member 30 and the tab piece 61. By adjusting the angle, the torque situation that the tab piece 61 bears under different working conditions can be simulated. The precise angle adjustment enables the test to reflect the stress state of the battery cell 60 during long - term use and under different operating conditions, improving the simulation effect of the test process on the actual working conditions.

[0033] In this embodiment, the testing device 70 is a tensile testing machine. The tensile testing machine clamps the fixing assembly 20 and the force - applying member 30 through the clamps, and the angle between the force - applying member 30 and the tab piece 61 is 90°.

[0034] In one embodiment, referring to Figure 4 , the locking member 50 includes a pressing portion 51 and a threaded portion 52. The threaded portion 52 passes through the connection hole 33 and is connected to the force - applying member 30. The pressing portion 51 is disposed at one end of the threaded portion 52, and the pressing portion 51 and the force - applying member 30 are used to clamp the tab piece 61.

[0035] In practical applications, a threaded structure is provided in the connection hole 33. First, the threaded portion 52 passes through the hole on the tab piece 61 and mates the threaded portion 52 with the threaded structure in the connection hole 33. Then, the angle between the tab piece 61 and the force - applying member 30 is maintained at a specified angle. Finally, the threaded portion 52 is rotated such that the pressing portion 51 and the force - applying member 30 jointly clamp the tab piece 61. The threaded portion 52 is connected to the force - applying member 30 by passing through the connection hole 33, enabling the force - applying member 30 to adjust the force - applying angle by rotation, while ensuring that the force - applying member 30 can accurately and stably apply pressure. The pressing portion 51 is disposed at one end of the threaded portion 52. Through the cooperative action with the force - applying member 30, it can firmly clamp the tab piece 61, effectively preventing the tab piece 61 from loosening or displacing during the test. This design not only improves the force - applying accuracy but also enhances the stability of the fixation of the tab piece 61, ensuring that the force applied during the test is uniform and stable, thereby improving the accuracy and reliability of the test and meeting the test requirements of the battery under different working conditions.

[0036] Furthermore, referring to Figure 4 , the locking member 50 includes a limiting portion 53. The force - applying member 30 is provided with a limiting groove 34. The limiting groove 34 communicates with the connection hole 33. The limiting portion 53 is disposed on the side of the pressing portion 51 close to the threaded portion 52, and the limiting portion 53 is inserted into the limiting groove 34 and abuts against the inner wall of the limiting groove 34.

[0037] In practical applications, the limiting portion 53 can be accurately inserted into the limiting groove 34 and abutted against the inner wall of the limiting groove 34, thereby ensuring that the force-applying member 30 is always in a predetermined position during the force application process, preventing the force-applying member 30 from deviating from the correct position due to excessive rotation or loosening. This design effectively limits the movement range of the force-applying member 30, ensures that the clamping force between the force-applying member 30 and the bar piece 61 always remains stable, avoids uneven or unstable forces between the force-applying member 30 and the bar piece 61, and further improves the accuracy and reliability of the test.

[0038] In one embodiment, referring to Figure 2 and Figure 4 , the force-applying member 30 includes a first connecting portion 31 and a second connecting portion 32. The connecting hole 33 is formed in the first connecting portion 31. The second connecting portion 32 is provided at one end of the first connecting portion 31. In the direction approaching the second connecting portion 32, the width of at least a part of the first connecting portion 31 gradually increases, and the width of the second connecting portion 32 is greater than the width of the first connecting portion 31.

[0039] In practical applications, through the structural optimization of the force-applying member 30, the flexibility of the angle adjustment between the force-applying member 30 and the bar piece 61 and the reliability of the connection between the force-applying member 30 and the testing device 70 are enhanced. The force-applying member 30 includes a first connecting portion 31 and a second connecting portion 32, wherein the first connecting portion 31 is connected to the bar piece 61, and the second connecting portion 32 is used for clamping with the testing device 70. The width of the first connecting portion 31 gradually increases, while the width of the second connecting portion 32 is greater than that of the first connecting portion 31. In the design, when the force-applying member 30 applies force, the first connecting portion 31 has a larger rotation range, so that the angle between the force-applying member 30 and the bar piece 61 can be adjusted within a larger range. This design enhances the flexibility of the force-applying member 30 and can adapt to the torque test requirements at different angles. In addition, the width of the second connecting portion 32 is greater than that of the first connecting portion 31, increasing the contact area with the testing device 70 and ensuring a more stable connection between the force-applying member 30 and the testing device 70, thereby improving the accuracy and reliability during the test.

[0040] In one embodiment, referring to Figure 2 , the second connecting portion 32 is provided with a positioning groove 321 for clamping by the testing device 70.

[0041] In practical applications, by designing a positioning groove 321 in the second connecting portion 32 of the force applying member 30, the connection stability between the force applying member 30 and the testing device 70 is further optimized. The positioning groove 321 opened in the second connecting portion 32 is specifically used for the testing device 70 to clamp, so as to ensure that the force applying member 30 can be accurately positioned when connected to the testing device 70, avoiding force application deviation or instability caused by inaccurate connection. This design ensures that the cooperation between the force applying member 30 and the testing device 70 is closer and firmer, improving the clamping force and force application accuracy during the torsional test.

[0042] Further, referring to Figure 4 , in the direction towards the second connecting portion 32, the thickness of at least a part of the first connecting portion 31 gradually increases. The positioning groove 321 is opened at one end of the second connecting portion 32 away from the first connecting portion 31, and the thickness of the second connecting portion 32 between the positioning groove 321 and the first connecting portion 31 is greater than the thickness of the first connecting portion 31.

[0043] In practical applications, through further optimization of the structure of the force applying member 30 in this application, the reliability and connection strength of the connection between the first connecting portion 31 and the second connecting portion 32 are significantly improved. In the direction towards the second connecting portion 32, the thickness of the first connecting portion 31 gradually increases. This design not only enhances the stability of the force applying member 30, but also ensures that the connecting portion is more evenly stressed when applying torque. In addition, the thickness of the second connecting portion 32 is greater than the thickness of the first connecting portion 31, thereby improving the strength of the second connecting portion 32, ensuring a firmer connection between the force applying member 30 and the testing device 70, and avoiding errors or asymmetric force application caused by unstable connection.

[0044] In one embodiment, referring to Figure 1 and Figure 2 , the force applying member 30 is provided with anti-slip lines 40, and the anti-slip lines 40 are used to increase the friction between the force applying member 30 and the testing device 70.

[0045] In practical applications, by setting anti-slip lines 40 on the surface of the force applying member 30 in this application, the connection stability between the force applying member 30 and the testing device 70 is further enhanced. The design of the anti-slip lines 40 effectively prevents the force applying member 30 and the testing device 70 from sliding or loosening during the force application process by increasing the friction between the force applying member 30 and the testing device 70. This structural optimization ensures the stability of the force applying member 30 during the test, avoiding the phenomenon of unstable connection or uneven force application caused by insufficient friction, thereby improving the accuracy of force application and the reliability of the test. The setting of the anti-slip lines 40 makes the cooperation between the force applying member 30 and the testing device 70 closer, further enhancing the overall stability of the tooling and the reliability during long-term use, ensuring that the battery test can be carried out under accurate and stable conditions.

[0046] In this embodiment, the anti-slip patterns 40 are disposed on two opposite side walls of the force applying member 30 .

[0047] In one embodiment, referring to Figure 2 The fixing assembly 20 includes a base 21 and a fixing member 22. The accommodating cavity 211 and the opening 212 are opened on the base 21. The force-applying member 30 and the fixing member 22 are respectively arranged on opposite sides of the base 21. The force-applying member 30 protrudes from the base 21. The fixing member 22 is used to connect with the testing equipment 70.

[0048] In actual application, the present application solves the problem that the base 21 may be damaged by applying a large force by connecting the test device 70 to the fixing member 22 instead of directly clamping the base 21. The fixing assembly 20 includes a base 21 and a fixing member 22, wherein the base 21 is provided with a accommodating cavity 211 and an opening 212, and the force-applying member 30 and the fixing member 22 are respectively arranged on opposite sides of the base 21. The test device 70 is connected to the tooling through the fixing member 22, avoiding the situation of directly clamping the base 21 and ensuring that the applied force does not cause excessive pressure or damage to the base 21. Through this design, the force-applying member 30 can work more stably, and the fixing member 22 ensures a firm connection between the test device 70 and the tooling, thereby improving the stability of the overall structure and avoiding the problem of the test results being affected by damage to the base 21 during the test process.

[0049] Further, refer to Figure 2 The fixing assembly 20 includes a reinforcement member 23 , one end of the reinforcement member 23 is connected to the base 21 , and the other end is connected to the fixing member 22 .

[0050] In practice, the present application further enhances the overall strength and stability of the fixture by adding a reinforcement member 23 to the fixing assembly 20. One end of the reinforcement member 23 is connected to the base 21, and the other end is connected to the fixing member 22, thereby providing additional support between the base 21 and the fixing member 22. This design effectively enhances the fixture's load-bearing capacity, especially when a large external force is applied, dispersing the applied force and preventing deformation or damage to the base 21 or the fixing member 22 due to excessive force.

[0051] Reference Figure 6 The battery testing method of the embodiment of the present application is implemented using the tooling of any of the above embodiments and includes the following steps:

[0052] Assemble the battery cell 60 to the fixing assembly 20 and connect the force applying member 30 to one of the tabs 61 on the battery cell 60 ;

[0053] The testing device 70 clamps the fixing assembly 20 and the force applying member 30 respectively, and performs a torsion test on the bar 61 connected to the force applying member 30 .

[0054] In practical applications, since the force-applying member 30 can adjust the angle between itself and the bar piece 61, the testing device can apply forces in different directions to the bar piece 61 through the force-applying member 30, so as to simulate the torsion conditions borne by the bar piece 61 under different working conditions, and improve the simulation effect of the testing process on the real working conditions.

[0055] In this embodiment, after a torsion test is performed on one bar piece 61, the battery cell 60 is disassembled from the fixing assembly 20, the battery cell 60 is flipped and then assembled to the fixing assembly 20 again, so that the positions of the tested bar piece 61 and another bar piece 61 are interchanged, and the force-applying member 30 is connected to the other bar piece 61; the testing device 70 respectively clamps the fixing assembly 20 and the force-applying member 30, and performs a torsion test on the bar piece 61 connected to the force-applying member 30.

[0056] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative positional relationship, movement conditions, etc. between components in a specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0057] It should also be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or there may be an intermediate element at the same time. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or can also be indirectly connected to the other element through an intermediate element.

[0058] In addition, the descriptions involving "first", "second", etc. in the present invention are only for descriptive purposes, and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the fact that those skilled in the art can implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0059] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention. Any equivalent structural transformation made under the inventive concept of the present invention, or direct / indirect application in other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. A tooling, characterized in that, Comprising: A fixing component, which is formed with a receiving cavity and an opening communicating with the receiving cavity. The receiving cavity is used for accommodating an electric core, and the opening is used for the tab of the electric core to pass through the receiving cavity; A force applying component, which is provided with a connecting hole. One end of the force applying component is used to be connected with the tab through the connecting hole, and the other end is used to be connected with the testing device; A locking component, which is inserted through the connecting hole and rotatably connected with the force applying component. The locking component is used to jointly clamp the tab with the force applying component when the force applying component rotates to a specified angle with respect to the tab.

2. The tooling according to claim 1, characterized in that, The locking component includes a pressing portion and a threaded portion. The threaded portion is inserted through the connecting hole and connected with the force applying component. The pressing portion is arranged at one end of the threaded portion, and the pressing portion and the force applying component are used to clamp the tab.

3. The tooling according to claim 2, characterized in that, The locking component includes a limiting portion. The force applying component is provided with a limiting groove, which communicates with the connecting hole. The limiting portion is arranged on the side of the pressing portion close to the threaded portion, and the limiting portion is inserted into the limiting groove and abuts against the inner wall of the limiting groove.

4. The tooling according to claim 1, characterized in that, The force applying component includes a first connecting portion and a second connecting portion. The connecting hole is opened in the first connecting portion. The second connecting portion is arranged at one end of the first connecting portion. In the direction towards the second connecting portion, the width of at least part of the first connecting portion gradually increases, and the width of the second connecting portion is greater than the width of the first connecting portion.

5. The tooling according to claim 1, characterized in that, The second connecting portion is provided with a positioning groove for being clamped by the testing device.

6. The tooling according to claim 5, characterized in that, In the direction towards the second connecting portion, the thickness of at least part of the first connecting portion gradually increases. The positioning groove is opened at the end of the second connecting portion far from the first connecting portion, and the thickness of the second connecting portion between the positioning groove and the first connecting portion is greater than the thickness of the first connecting portion.

7. The tooling according to any one of claims 1 to 6, characterized in that The force applying component is provided with anti-slip lines for increasing the friction between the force applying component and the testing device.

8. The tooling according to any one of claims 1-6, characterized in that, The fixing component includes a base body and a fixing member. The receiving cavity and the opening are opened in the base body. The force applying component and the fixing member are respectively arranged on opposite sides of the base body. The force applying component protrudes from the base body, and the fixing member is used to be connected with the testing device.

9. The tooling according to claim 8, characterized in that, The fixing component includes a reinforcing member. One end of the reinforcing member is connected with the base body, and the other end is connected with the fixing member.

10. A detection method for the tooling according to any one of claims 1-9, characterized in that, Comprising: Assembling the electric core into the fixing component and connecting the force applying component with one of the tabs on the electric core; The testing device respectively clamps the fixing component and the force applying component to perform a torsion test on the tab connected to the force applying component.

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