Lithium ion soft package battery tension testing device

Abstract

The utility model discloses a lithium ion soft package battery tension testing device which comprises two lower clamping hands which are symmetrically arranged left and right, two upper clamping hands are respectively arranged above the two lower clamping hands, and the two lower clamping hands are respectively connected with a driving mechanism used for driving the two lower clamping hands to move left and right, so that the two lower clamping hands are respectively aligned with the two upper clamping hands. And the two upper clamping hands are respectively connected with the tension sensor connecting shaft. The lithium ion soft package battery tension testing device provided by the utility model has the beneficial effects that the welding tension and the aluminum plastic film sealing tension of the lithium ion soft package battery can be rapidly and simultaneously tested, and the problem that two samples are easy to damage and the testing precision cannot be reached due to the fact that the same battery cell is separately manufactured into the two samples is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of tensile testing of lithium-ion soft-pack batteries, in particular to a tensile testing device for lithium-ion soft-pack batteries. Background Art

[0002] During the production of soft-pack batteries, it is necessary to test the welding effect by pulling apart the positive and negative current collectors and the tabs after welding, and it is also necessary to pull apart the two ends of the aluminum-plastic film seal to test the sealing effect. For the two measurement requirements, due to the different testing requirements / frequency during the production process, there will be a large number of scrapped batteries during the production process. At the same time, some companies use different battery samples and separate testing methods for testing. The process is complicated and time-consuming, which is not conducive to mass production; some companies use the same battery sample preparation and separate testing methods for testing. Making two test samples of the same battery separately is easy to damage the sample, resulting in the situation where the test accuracy cannot be achieved. Utility Model Content

[0003] The purpose of the utility model is to overcome the above technical deficiencies, provide a lithium ion soft pack battery tension testing device, and solve the technical problems of the background technology.

[0004] In order to achieve the above-mentioned technical purpose, the technical solution of the utility model provides a lithium-ion soft-pack battery tension testing device, including two lower grippers arranged symmetrically on the left and right, two upper grippers are respectively provided above the two lower grippers, and the two lower grippers are respectively connected to a driving mechanism for driving the two lower grippers to move left and right, so that the two lower grippers are respectively aligned with the two upper grippers, and the two upper grippers are respectively connected to the tension sensor connecting shaft.

[0005] Furthermore, the lower clamp includes a lower guide rail, and two lower clamping blocks are slidably provided on the top of the lower guide rail. The opposite sides of the two lower clamping blocks are rotatably connected to one end of two lower bolts respectively. Lower fixing blocks are installed at both ends of the two lower guide rails, and the two lower bolts are respectively threadedly connected to the threaded holes of the two lower fixing blocks.

[0006] Furthermore, the driving mechanism includes a guide rail, a sliding plate is slidably provided on the top of the guide rail, two lower clamps are installed on the top of the sliding plate, the sliding plate is threadedly connected to the screw rod, and both ends of the screw rod are respectively installed on both ends of the guide rail through bearings.

[0007] Furthermore, a handle is installed at one end of the screw rod.

[0008] Furthermore, the sliding plate includes a plate body, two lower clamps are installed on the top of the plate body, a slider is installed at the bottom of the plate body, the slider is slidably arranged on the top of the guide rail, and a connecting block is also installed at the bottom of the plate body, and the screw rod is threadedly connected to the threaded hole of the connecting block.

[0009] Furthermore, the upper clamp includes an upper guide rail, and two upper clamping blocks are slidably provided on the top of the upper guide rail. The opposite sides of the two upper clamping blocks are rotatably connected to one end of two upper bolts respectively. Upper fixing blocks are installed at both ends of the two upper guide rails, and the two upper bolts are respectively threadedly connected to the threaded holes of the two upper fixing blocks.

[0010] The beneficial effects of the utility model include: the utility model provides a lithium-ion soft-pack battery tension testing device, which can quickly and simultaneously test the welding tension and aluminum-plastic film sealing tension of the lithium-ion soft-pack battery, avoiding the problem of damage to the sample caused by making two samples separately from the same battery cell, resulting in the problem of insufficient test accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a schematic diagram of the structure of a lithium-ion soft-pack battery tension test device of the utility model;

[0012] Figure 2 This is another state diagram of a lithium-ion soft-pack battery tension test device of the utility model;

[0013] In the figure: 1. lower grip; 11. lower guide rail; 12. lower clamping block; 13. lower bolt; 14. lower fixing block, 2. upper grip; 21. upper guide rail; 22. upper clamping block; 23. upper bolt; 24. upper fixing block, 3. driving mechanism; 31. guide rail; 32. sliding plate; 321. plate body; 322. slider; 323. connecting block; 33. screw rod; 34. bearing; 35. handle; 4. pressure sensor connecting shaft; 41. mounting plate. DETAILED DESCRIPTION

[0014] 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.

[0015] The utility model provides a lithium ion soft pack battery tension test device, such as Figure 1-2 As shown, it includes two lower grippers 1 symmetrically arranged on the left and right, two upper grippers 2 are respectively arranged above the two lower grippers 1, and the two lower grippers 1 are respectively installed on a driving mechanism 3 for driving the two lower grippers 1 to move left and right, so that the two lower grippers 1 are respectively aligned with the two upper grippers 2, and the two upper grippers 2 are respectively connected to the tension sensor connecting shaft 4.

[0016] In this embodiment, the lower clamping hand 1 includes a lower guide rail 11, and two lower clamping blocks 12 are slidably provided on the top of the lower guide rail 11. The opposite sides of the two lower clamping blocks 12 are rotatably connected to one end of two lower bolts 13 respectively. Lower fixing blocks 14 are installed at both ends of the two lower guide rails 11. The two lower bolts 13 are respectively threadedly connected to the threaded holes of the two lower fixing blocks 14. By rotating the two lower bolts 13, the two lower clamping blocks 12 can be driven to move relative or oppositely to achieve the clamping function. The structure is simple and the operation is convenient.

[0017] In another embodiment, the lower clamping hand 1 includes a lower guide rail 11, and two lower clamping blocks 12 are slidably provided on the top of the lower guide rail 11. The opposite sides of the two lower clamping blocks 12 are respectively connected to two cylinders or hydraulic cylinders. The two cylinders or hydraulic cylinders can respectively drive the two lower clamping blocks 12 to move relative or oppositely to realize the automatic clamping function.

[0018] In this embodiment, the driving mechanism 3 includes a guide rail 31, a sliding plate 32 is slidably provided on the top of the guide rail 31, and the two lower clamps 1 are installed on the top of the sliding plate 32. The sliding plate 32 is threadedly connected to the screw rod 33. The two ends of the screw rod 33 are respectively installed at the two ends of the guide rail 31 through bearings 34. The sliding plate 32 can be driven to move left and right by rotating the screw rod 22. At the same time, in order to facilitate the rotation of the screw rod 33, a handle 35 is installed at one end of the screw rod 33. The handle 35 is disc-shaped, which can facilitate the rotation of the screw rod 33.

[0019] It should be noted that the sliding plate 32 includes a plate body 321, and the two lower clamps 1 are installed on the top of the plate body 321. A slider 322 is installed at the bottom of the plate body 321. The slider 322 is slidably arranged on the top of the guide rail 31. A connecting block 323 is also installed at the bottom of the plate body 321, and the screw rod 33 is threadedly connected to the threaded hole of the connecting block 323.

[0020] In this embodiment, the two upper clamping hands 2 include an upper guide rail 21, and two upper clamping blocks 22 are slidably provided on the top of the upper guide rail 21. The opposite sides of the two upper clamping blocks 22 are rotatably connected to one end of two upper bolts 23 respectively. Upper fixing blocks 24 are installed at both ends of the two upper guide rails 21. The two upper bolts 23 are respectively threadedly connected to the threaded holes of the two upper fixing blocks 24. By rotating the two upper bolts 23, the two upper clamping blocks 12 can be driven to move relative or oppositely to achieve the clamping function. The structure is simple and the operation is convenient.

[0021] It should be noted that a mounting plate 41 is installed at the lower end of the tension sensor connecting shaft 4 , and the two upper grippers 2 are both installed at the bottom of the mounting plate 41 .

[0022] In another embodiment, the two upper clamping hands 2 include an upper guide rail 21, and two upper clamping blocks 22 are slidably provided on the top of the upper guide rail 21. The opposite sides of the two upper clamping blocks 22 are respectively connected to two cylinders or hydraulic cylinders. The two upper clamping blocks 22 can be driven to move relative or oppositely by the two cylinders or hydraulic cylinders to realize the automatic clamping function.

[0023] Specific principle: When conducting a tensile test, one of the lower grippers 1 is clamped on the foil on one side of the sample weld mark, and the other lower gripper 1 is clamped on one side of the sample aluminum-plastic film seal. The two lower grippers 1 are driven to move left and right by the driving mechanism 3, so that the two lower grippers are aligned with the two upper grippers 2 respectively, and one of the upper grippers 2 is clamped on the TAB sheet on the other side of the sample weld mark, and the other upper gripper 2 is clamped on the other side of the sample aluminum-plastic film seal. The tensile sensor is driven to move upward by the automatic lifting mechanism, and at the same time, the tensile sensor can drive the two upper grippers 2 to move upward through the tensile sensor connecting shaft 4, and the sample is subjected to welding tensile test and sealing tensile test. When the weld mark position is stressed and falls off, the two upper grippers 2 continue to move upward, and the test is completed after the seal position is stressed and falls off.

[0024] The beneficial effects of the utility model include: the utility model provides a lithium-ion soft-pack battery tension testing device, which can quickly and simultaneously test the welding tension and aluminum-plastic film sealing tension of lithium-ion soft-pack batteries, avoiding the problem of damage to the samples easily caused by making two samples separately from the same battery cell, resulting in the problem of insufficient test accuracy. At the same time, the utility model is simple to operate and is suitable for offline detection of high-frequency welding tension and sealing tension on the assembly line.

[0025] The specific implementation methods of the utility model described above do not constitute a limitation on the protection scope of the utility model. Any other corresponding changes and modifications made according to the technical concept of the utility model should be included in the protection scope of the claims of the utility model.

Claims

1. A tensile testing device for lithium-ion soft-pack batteries, characterized in that: The invention comprises two lower grippers (1) which are symmetrically arranged on the left and right, two upper grippers (2) are respectively arranged above the two lower grippers (1), the two lower grippers (1) are respectively connected to a driving mechanism (3) for driving the two lower grippers (1) to move left and right, so that the two lower grippers (1) are respectively aligned with the two upper grippers (2), and the two upper grippers (2) are respectively connected to a tension sensor connecting shaft (4).

2. A lithium-ion soft-pack battery tensile testing device according to claim 1, characterized in that: The lower gripper (1) comprises a lower guide rail (11), the top of which is slidably provided with two lower clamping blocks (12), the opposite sides of the two lower clamping blocks (12) are rotatably connected to one end of two lower bolts (13), and lower fixing blocks (14) are installed at both ends of the two lower guide rails (11), and the two lower bolts (13) are respectively threadedly connected to the inside of the threaded holes of the two lower fixing blocks (14).

3. A lithium-ion soft-pack battery tensile testing device according to claim 1, characterized in that: The driving mechanism (3) comprises a guide rail (31), a sliding plate (32) is slidably provided on the top of the guide rail (31), the two lower grippers (1) are both mounted on the top of the sliding plate (32), the sliding plate (32) is threadedly connected to a screw rod (33), and the two ends of the screw rod (33) are respectively mounted on the two ends of the guide rail (31) through bearings (34).

4. A lithium-ion soft-pack battery tensile testing device according to claim 3, characterized in that: A handle (35) is mounted on one end of the screw rod (33).

5. A lithium-ion soft-pack battery tensile testing device according to claim 3, characterized in that: The sliding plate (32) comprises a plate body (321), the two lower grippers (1) are both mounted on the top of the plate body (321), a slider (322) is mounted on the bottom of the plate body (321), the slider (322) is slidably mounted on the top of the guide rail (31), a connecting block (323) is also mounted on the bottom of the plate body (321), and the screw rod (33) is threadedly connected to the inside of the threaded hole of the connecting block (323).

6. A lithium-ion soft-pack battery tensile testing device according to claim 1, characterized in that: The upper clamping hand (2) comprises an upper guide rail (21), and two upper clamping blocks (22) are slidably provided on the top of the upper guide rail (21). The opposite sides of the two upper clamping blocks (22) are rotatably connected to one end of two upper bolts (23) respectively. Upper fixing blocks (24) are installed at both ends of the two upper guide rails (21), and the two upper bolts (23) are respectively threadedly connected to the inside of the threaded holes of the two upper fixing blocks (24).

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