Battery cell bending tester

Abstract

A battery cell bending testing machine comprises a linear module, two chucks and a controller, the linear module is in driving connection with one chuck so as to drive the chuck to move relative to the other chuck in the bending direction, and the linear module is electrically connected with the controller; the chuck comprises a probe, a base, a clamping block and a quick clamp, the probe is fixed to the clamping block and electrically connected with the controller, at least one part of the clamping block is located over the base, the quick clamp is fixed to the base, the quick clamp is in driving connection with the clamping block so as to drive the clamping block to move up and down relative to the base, and when the base and the clamping block clamp the battery cell, the probe makes contact with a tab of the battery cell. The bending testing machine not only can automatically complete the bending test of the battery cell, but also can quickly clamp and loosen the two ends of the battery cell by using the quick clamps, so that the operation is simplified, and the efficiency is improved.

Description

Technical Field

[0001] The utility model relates to a bending testing machine, in particular to a battery core bending testing machine. Background Art

[0002] After the soft-pack battery cell is manufactured, it is usually necessary to perform a bending test on the cell to detect its bending fatigue performance. The bending test is usually conducted using a bending tester. Specifically, the bending tester clamps the two ends of the cell and then bends the cell repeatedly for a set number of times. Finally, the bending fatigue performance is judged to see whether the cell short-circuits during the repeated bending process.

[0003] However, existing battery cell bending testing machines require clamping the two ends of the battery cell by locking screws, which is relatively complicated to operate and has low efficiency. Utility Model Content

[0004] In order to overcome the shortcomings and deficiencies in the prior art, the purpose of the present invention is to design a battery cell bending testing machine that can quickly clamp the two ends of the battery cell, simplify operation, and improve efficiency.

[0005] To achieve the above-mentioned purpose, the utility model provides a battery cell bending testing machine, comprising: a linear module, two chucks and a controller, the linear module is driven and connected to one chuck to drive one chuck to move relative to the other chuck along a bending direction, and the linear module is electrically connected to the controller; the chuck comprises: a probe, a base and a clamping block, the probe is fixed to the clamping block and is electrically connected to the controller, at least a portion of the clamping block is located directly above the base, the chuck also comprises: a quick clamp, the quick clamp is fixed to the base, the quick clamp is driven and connected to the clamping block to drive the clamping block to move up and down relative to the base, and when the base and the clamping block clamp the battery cell, the probe contacts the tab of the battery cell.

[0006] Furthermore, the quick clamp includes a lifting rod, a handle, a swing frame, and a guide cylinder. The guide cylinder is fixed to the base, and the lifting rod passes through the guide cylinder. One end of the lifting rod and one end of the swing frame are both pivotally connected to the handle, the other end of the swing frame is pivotally connected to the guide cylinder, and the other end of the lifting rod is fixedly connected to the clamping block. Rotating the handle can drive the lifting rod up and down, thereby achieving rapid clamping and loosening operations of the clamp.

[0007] Furthermore, the swing frame is provided with two swing plates and a baffle, one end of each swing plate is pivotally connected to the handle, and the other end of each swing plate is pivotally connected to the guide cylinder, and the baffle is located between the two swing plates. The baffle can limit the rotation range of the handle to prevent the lifting rod from separating from the guide cylinder.

[0008] Furthermore, the handle is provided with an operating arm and a driving arm, wherein the operating arm is fixedly connected to the driving arm, the connection between the operating arm and the driving arm is pivotally connected to one end of the swing frame, and the driving arm is pivotally connected to one end of the lifting rod. The user can hold the operating arm to operate the handle, making it convenient for the user to apply force to the handle.

[0009] Furthermore, the base has a receiving surface with a groove. The clamping block has a through hole extending vertically and a downwardly protruding boss. The probe passes through the through hole. When the base and clamping block clamp the battery cell, the boss fits into the groove. The groove can position the end of the battery cell, making it easier for users to place the battery cell.

[0010] Furthermore, the receiving surface is provided with a support platform, and the guide cylinder includes a through-hole screw and a positioning nut. The lifting rod passes through the through-hole screw, and the through-hole screw passes through the support platform and is threadedly connected to the positioning nut. The through-hole screw and the positioning nut cooperate to detachably secure the quick clamp to the support platform, making it convenient for users to replace the quick clamp.

[0011] Furthermore, the bending tester further comprises a chassis, wherein the linear module, the two chucks and the controller are all arranged in the chassis, wherein the chassis can protect the linear module, the two chucks and the controller.

[0012] Furthermore, the chassis includes a base, a housing, and a removable cover. The linear module, two chucks, housing, and cover are all located above the base. The controller is located inside the housing, and the two chucks are located inside the cover. If the battery cell ruptures during the bending process, causing electrolyte splashing, the cover can prevent the electrolyte from splashing onto the user, thereby protecting the user.

[0013] Furthermore, the linear module includes: a mold frame, a motor, a coupling, a lead screw, and a lead screw nut. The motor is electrically connected to a controller, the motor housing is fixed to the mold frame, the lead screw is arranged along the bending direction and is rotatably mounted on the mold frame, the motor shaft of the motor is connected to the lead screw via a coupling, the lead screw nut is threadedly connected to the lead screw, and a chuck is fixed to the lead screw nut. The motor can drive the chuck to move back and forth in the bending direction, thereby achieving the bending action of the battery cell.

[0014] Furthermore, the linear module also includes three proximity switches, all electrically connected to a controller. The three proximity switches are detachably secured to the mold frame and arranged sequentially along the bending direction. The lead screw nut is provided with a sensor plate, the movement trajectory of which passes through at least one of the proximity switches. The three proximity switches of the linear module are used to sense the position of the sensor plate and, in conjunction with the controller, implement the bending test machine's folding test mode and torque test mode.

[0015] After adopting the above technical solution, the beneficial effect is: the bending testing machine of the utility model can not only automatically complete the bending test of the battery cell, but also can use the quick clamp to quickly clamp and release the two ends of the battery cell, simplifying the operation and improving efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of a bending testing machine involved in the present utility model;

[0017] Figure 2 This is an internal view of the bending testing machine involved in the present utility model;

[0018] Figure 3 This is a schematic diagram of the linear module involved in the present utility model;

[0019] Figure 4 It is a partial schematic diagram of the chuck involved in the utility model;

[0020] Figure 5 A schematic diagram of the clamping state of the quick clamp involved in the present utility model;

[0021] Figure 6 This is a schematic diagram of the release state of the quick clamp involved in the present invention.

[0022] The accompanying drawings are marked as follows: 1. chassis; 11; base; 12. box body; 13. cover; 2. linear module; 21. mold frame; 22. motor; 23. coupling; 24. screw; 25. screw nut; 250. sensor plate; 26. proximity switch; 3. chuck; 31. base; 311. receiving surface; 312. groove; 313. support platform; 32. clamping block; 321. through hole; 322. boss; 33. quick clamp; 331. lifting rod; 332. handle; 3321. operating arm; 3322. driving arm; 333. swing frame; 3331. swing plate; 3332. baffle; 334. through-hole screw; 335. positioning nut; 4. controller. DETAILED DESCRIPTION

[0023] The technical solution of the present invention is further described below by way of embodiments:

[0024] The utility model provides a battery core bending test machine, combined with Figures 1-2As shown, the bending tester includes: a chassis 1, a linear module 2, two chucks 3 and a controller 4. The linear module 2, the two chucks 3 and the controller 4 are all arranged in the chassis 1. The linear module 2 is connected to a chuck 3 (i.e., a movable chuck) to drive one chuck 3 to move relative to another chuck 3 (i.e., a fixed chuck) along a bending direction. The linear module 2 and the two chucks 3 are both electrically connected to the controller 4. During operation, the two chucks 3 are first used to fix the two ends of the battery cell respectively, and then the linear module 2 is started by the controller 4, so that the movable chuck of the linear module 2 moves back and forth relative to the fixed chuck along the bending direction, thereby repeatedly bending the battery cell. At the same time, the controller 4 detects whether the battery cell has a short circuit through the chuck 3 until the number of bends reaches a predetermined value, and finally removes the battery cell. If the battery cell still does not short-circuit when the predetermined number of bends is reached, it indicates that the bending fatigue performance of the battery cell meets the requirements and is a good product; otherwise, it is a defective product. The above working principle is the same as that of the prior art and will not be described in detail here.

[0025] For details, please refer to Figure 1 As shown, the chassis 1 includes a base 11, a housing 12, and a removable cover 13. The linear module 2, two clamps 3, housing 12, and cover 13 are all located above the base 11. The controller 4 is located inside the housing 12, and the two clamps 3 are located inside the cover 13. Before operation, the cover 13 is removed, and after the two clamps 3 clamp the battery cell, the cover 13 is replaced to cover the two clamps 3 and the battery cell.

[0026] Specifically, if Figure 3 As shown, the linear module 2 includes: a mold frame 21, a motor 22, a coupling 23, a screw 24, a screw nut 25, and three proximity switches 26. The motor 22 and the three proximity switches 26 are all electrically connected to the controller 4. The housing of the motor 22 is fixed to the mold frame 21. The screw 24 is arranged along the bending direction and is rotatably set on the mold frame 21. The motor shaft of the motor 22 is connected to the screw 24 through the coupling 23. The screw nut 25 is threadedly connected to the screw 24. A chuck 3 is fixed to the screw nut 25. The three proximity switches 26 are all detachably fixed to the mold frame 21 and arranged in sequence along the bending direction. The screw nut 25 is provided with a sensor plate 250. The movement trajectory of the sensor plate 250 passes through at least one proximity switch 26. During operation, the motor 22 drives the screw 24 to rotate, thereby driving the screw nut 25 to move, and then driving a chuck 3 to move.

[0027] In addition, the bending testing machine of the present invention has two test modes: the first test mode is the folding test mode, in which the position of the proximity switch 26 located in the middle is set according to the width of the battery cell, that is, the distance between the proximity switch 26 and the fixed clamp is adapted to the width of the battery cell. During the test, the movable clamp first moves toward the fixed clamp until the battery cell is completely folded; then the controller 4 controls the linear module 2 to make the movable clamp move in the opposite direction; when the induction plate 250 reaches the position of the proximity switch 26, the controller 4 controls the linear module 2 to make the movable clamp move in the opposite direction again, and so on. The second mode is the torque test mode. The position of the proximity switch 26 farthest from the fixed chuck is set according to the width of the battery cell, and the position of the proximity switch 26 closest to the fixed chuck is set according to the torque that the battery cell needs to withstand. During the test, the movable chuck first moves toward the fixed chuck. When the sensing piece 250 reaches the position of the proximity switch 26 closest to the fixed chuck, the controller 4 controls the linear module 2 to move the movable chuck in the opposite direction. When the sensing piece 250 reaches the position of the proximity switch 26 farthest from the fixed chuck, the controller 4 controls the linear module 2 to move the movable chuck in the opposite direction again, and so on. Among them, the folding test mode tests the bending fatigue performance of the battery cell when it is completely folded, while the torque test mode tests the bending fatigue performance of the battery cell under the premise of being subjected to a specific torque.

[0028] Although the linear module 2 is a screw-type linear module in this embodiment, in other embodiments, the linear module 2 may also be a belt-type linear module.

[0029] For details, please refer to Figure 2 As shown, the chuck 3 includes: a probe (not shown in the figure), a base 31, a clamping block 32 and a quick clamp 33. The probe is fixed to the clamping block 32 and is electrically connected to the controller 4. The quick clamp 33 is fixed to the base 31. At least a portion of the clamping block 32 is located directly above the base 31. The quick clamp 33 is connected to the clamping block 32 to drive the clamping block 32 to move up and down relative to the base 31. When the base 31 and the clamping block 32 clamp the battery cell, the probe contacts the tab of the battery cell. During operation, one end of the battery cell is placed on the base 31, and the quick clamp 33 is used to drive the clamping block 32 to move downward, thereby clamping the battery cell. At this time, the probe contacts the tab of the battery cell to form an electrical connection.

[0030] More specifically, if Figure 4 As shown, the base 31 has a receiving surface 311 with a groove 312. The clamping block 32 has a vertical through-hole 321 and a downwardly protruding boss 322. The probe passes through the through-hole 321. When the base 31 and clamping block 32 clamp the battery cell, the boss 322 fits into the groove 312. After the battery cell is placed, the end of the battery cell is located in the groove 312, and the battery cell tab is directly below the through-hole 321.

[0031] More specifically, combined Figures 5-6 As shown, the quick clamp 33 comprises a lifting rod 331, a handle 332, a swing frame 333, and a guide cylinder. The guide cylinder is fixed to the base 31, and the lifting rod 331 passes through the guide cylinder. One end of the lifting rod 331 and one end of the swing frame 333 are both pivotally connected to the handle 332. The other end of the swing frame 333 is pivotally connected to the guide cylinder, and the other end of the lifting rod 331 is fixedly connected to the clamping block 32. During operation, rotating the handle 332 causes the lifting rod 331 to move up and down relative to the guide cylinder, and the swing frame 333 is used to pull the handle 332.

[0032] More specifically, the swing frame 333 is equipped with two swing plates 3331 and a baffle 3332. One end of each swing plate 3331 is pivotally connected to the handle 332, and the other end of each swing plate 3331 is pivotally connected to the guide cylinder. The baffle 3332 is located between the two swing plates 3331. When the handle 332 is rotated, the two swing plates 3331 move with the movement of the handle 332. When the lifting rod 331 rises, the baffle 3332 moves toward the lifting rod 331. When the baffle 3332 contacts the lifting rod 331, the handle 332 cannot continue to rotate.

[0033] More specifically, the handle 332 is provided with an operating arm 3321 and a driving arm 3322. The operating arm 3321 and the driving arm 3322 are fixedly connected. The angle between the operating arm 3321 and the driving arm 3322 is greater than 0° and less than 90°. The connection between the operating arm 3321 and the driving arm 3322 is pivotally connected to one end of the swing frame 333. The driving arm 3322 is pivotally connected to one end of the lifting rod 331. During operation, the user grasps the operating arm 3321 and rotates the handle 332, causing the driving arm 3322 to move the lifting rod 331. In this embodiment, the angle between the operating arm 3321 and the driving arm 3322 is 90°.

[0034] More specifically, the receiving surface 311 is further provided with a support platform 313. The guide cylinder includes a through-hole screw 334 and a positioning nut 335. The lifting rod 331 passes through the through-hole screw 334, which in turn passes through the support platform 313 and is threadedly engaged with the positioning nut 335. This structure allows the quick clamp 33 to be removably secured to the support platform 313. In this embodiment, the other ends of the two swing plates 3331 are pivotally connected to the through-hole screw 334.

Claims

1. A battery cell bending tester, comprising: A linear module, two chucks and a controller, the linear module is connected to a chuck drive to drive one chuck to move relative to the other chuck along a bending direction, and the linear module is electrically connected to the controller; the chuck includes: a probe, a base and a clamping block, the probe is fixed to the clamping block and is electrically connected to the controller, at least a portion of the clamping block is located directly above the base, and it is characterized in that: the chuck also includes: a quick clamp, the quick clamp is fixed to the base, the quick clamp is connected to the clamping block drive to drive the clamping block to move up and down relative to the base, and when the base and the clamping block clamp the battery cell, the probe contacts the tab of the battery cell.

2. The battery cell bending testing machine according to claim 1, characterized in that: The quick clamp includes: a lifting rod, a handle, a swing frame and a guide cylinder, the guide cylinder is fixed to the base, the lifting rod passes through the guide cylinder, one end of the lifting rod and one end of the swing frame are pivotally connected to the handle, the other end of the swing frame is pivotally connected to the guide cylinder, and the other end of the lifting rod is fixedly connected to the clamping block.

3. The battery cell bending testing machine according to claim 2, characterized in that: The swing frame is provided with two swing plates and a baffle, one end of the two swing plates is pivotally connected to the handle, the other end of the two swing plates is pivotally connected to the guide cylinder, and the baffle is located between the two swing plates.

4. The battery cell bending testing machine according to claim 2, characterized in that: The handle is provided with an operating arm and a driving arm, the operating arm is fixedly connected to the driving arm, the connection between the operating arm and the driving arm is pivoted to one end of the swing frame, and the driving arm is pivoted to one end of the lifting rod.

5. The battery cell bending testing machine according to claim 2, characterized in that: The base is provided with a receiving surface, and the receiving surface is provided with a groove; the clamping block is provided with a through hole extending vertically and a boss protruding downward, and the probe passes through the through hole. When the base and the clamping block clamp the battery cell, the boss fits into the groove.

6. The battery cell bending testing machine according to claim 5, characterized in that: The receiving surface is further provided with a support platform, and the guide cylinder comprises: a through-hole screw and a positioning nut, the lifting rod passes through the through-hole screw, and the through-hole screw passes through the support platform and is threadedly connected with the positioning nut.

7. The battery cell bending testing machine according to claim 1, characterized in that: The bending testing machine further comprises: a chassis, and the linear module, the two chucks and the controller are all arranged in the chassis.

8. The battery cell bending testing machine according to claim 7, characterized in that: The chassis includes: a base, a box body and a detachable cover. The linear module, two chucks, the box body and the cover are all located above the base. The controller is located inside the box body, and the two chucks are both located inside the cover.

9. The battery cell bending testing machine according to claim 1, characterized in that: The linear module includes: a mold frame, a motor, a coupling, a screw and a screw nut. The motor is electrically connected to the controller, the motor housing is fixed to the mold frame, the screw is arranged along the bending direction and is rotatably set on the mold frame, the motor shaft of the motor is connected to the screw through a coupling, the screw nut is threaded with the screw, and a chuck is fixed to the screw nut.

10. The battery cell bending testing machine according to claim 9, characterized in that: The linear module also includes: three proximity switches, all of which are electrically connected to the controller. The three proximity switches are all detachably fixed to the mold frame and arranged in sequence along the bending direction. The lead screw nut is provided with a sensor plate, and the moving trajectory of the sensor plate passes through at least one proximity switch.

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