Lithium battery testing device and method

Abstract

The invention relates to the technical field of lithium battery testing, and discloses a lithium battery testing device and method.The device comprises a testing cabinet, interlayers are arranged in the testing cabinet at equal intervals, grooves are formed in the bottom walls of the interlayers at equal intervals, a carrier plate is arranged in the grooves, and a frame is fixedly installed at the top of the carrier plate; sliding rods are fixedly installed at the four corners of the bottom wall of the groove, the tops of the sliding rods penetrate through the carrier plate and extend to the positions above the carrier plate to be fixedly provided with limiting blocks, and first springs are fixedly installed at the bottom of the carrier plate. In the whole test process, the lithium battery is only required to be placed on the carrier plate, automatic connection of the wire clamp and the lithium battery pole can be realized, manual connection of a plurality of wire clamps and the pole is not required, the workload is greatly reduced, time and labor are saved, the height of the lithium battery can be adjusted through the adjusting assembly, the distance between the wire clamps can be adjusted adaptively, and the test efficiency is improved. And testing of lithium batteries with different sizes can be satisfied.

Description

Technical Field

[0001] The present invention belongs to the technical field of lithium battery testing, and in particular relates to a lithium battery testing device and method. Background Art

[0002] Lithium battery (Lithium Cell) is a battery that uses lithium metal or lithium alloy as the anode material and uses a non-aqueous electrolyte solution. The lithium battery includes a cover structure, which includes a positive electrode column, a conductive sheet, a top cover sheet and a plastic cover. The conductive sheet is connected to the positive electrode column, the positive electrode column and the top cover sheet are insulated, and the plastic cover is connected to the top cover sheet. The difference between lithium batteries and lithium-ion batteries is that the former is a primary battery, while the latter is a rechargeable battery.

[0003] The lithium batteries used in electric vehicles need to be tested for charge and discharge before leaving the factory. This requires the use of a charge and discharge test bench. When using an existing charge and discharge test bench, multiple wire clamps need to be manually connected to the poles of multiple lithium batteries one by one. Due to the large number of lithium batteries being tested, the entire work is very arduous, time-consuming and laborious.

[0004] Therefore, it is necessary to invent a lithium battery testing device and method to solve the above problems. Summary of the invention

[0005] In view of the above problems, the present invention provides a lithium battery testing device and method to solve the problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A lithium battery testing device comprises a testing cabinet, wherein partitions are arranged equidistantly inside the testing cabinet, grooves are arranged equidistantly on the bottom wall of the partitions, a carrier is arranged in the groove, a frame is fixedly installed on the top of the carrier, sliding columns are fixedly installed on the four corners of the bottom wall of the groove, the top of the sliding column extends through the carrier to the top of the carrier and a limit plate is fixedly installed, a first spring is fixedly installed on the bottom of the carrier, sliding grooves are arranged equidistantly on the top wall of the partitions, sliders are symmetrically slidably installed in the sliding grooves, side plates are symmetrically fixedly installed on the bottom of the sliders, and the front and rear of the frame are fixedly installed. The upper part of the inner walls on both sides is provided with a transverse groove, and connecting blocks are symmetrically and slidably installed in the transverse groove, a bracket is fixedly installed between the front and rear two opposite connecting blocks, a limiting block is fixedly installed on the top of the bracket, a rotating shaft is symmetrically and rotatably installed on the bracket, both ends of the rotating shaft extend to the outer sleeve of the bracket and a torsion spring is provided, the two ends of the torsion spring are respectively fixedly connected to the rotating shaft and the bracket, a wire clamp is provided on the external fixed sleeve of the rotating shaft, and a limiting component for limiting the wire clamp is provided on the outside, and an adjustment component for adjusting the height of the battery is provided on the carrier.

[0008] Furthermore, the limiting assembly includes a magnet bar, a mounting groove is provided at the lower outer side of the wire clamp, the magnet bar is fixedly installed inside the mounting groove, and the side plate is made of iron.

[0009] Furthermore, the magnetic force of the magnet strip can overcome the torsion force of the torsion spring and adsorb to the inner side of the side plate.

[0010] Furthermore, the adjustment assembly includes a placement plate, openings are provided on both sides of the frame, and both sides of the placement plate are slidably arranged in the openings. Operation openings are provided on both sides of the frame and above the openings. A screw rod is symmetrically rotatably installed on the top of the carrier plate, and both sides of the placement plate are threadedly sleeved outside the screw rod. The top of the screw rod extends to the operation opening and a knob is fixedly installed therein.

[0011] Furthermore, a guide plate is fixedly installed on one side of the side plate close to the center of the frame, the guide plate is located on the side of the side plate close to the wire clamp, a sliding rod is fixedly installed in the sliding groove, the slider is slidably sleeved outside the sliding rod, a second spring is sleeved on the outside of the sliding rod, and the second spring is located between the two sliders.

[0012] Furthermore, a plane that fits with the inner side of the wire clamp is provided on one side of the guide plate close to the wire clamp, and an inclined surface connected to the plane is provided on one side of the guide plate away from the plane.

[0013] Furthermore, the torsion force of the torsion spring is greater than the elastic force of the second spring.

[0014] The present invention also provides a method for testing a lithium battery using the above-mentioned lithium battery testing device, comprising the following steps:

[0015] S1. When in use, pass the pole of the lithium battery to be tested through the two pairs of wire clamps, then place the lithium battery on the carrier board, and then release your hands;

[0016] S2. Under the action of gravity, the lithium battery descends with the carrier, frame, connecting block, bracket, limit block, rotating shaft and wire clamp, and the carrier compresses the first spring to deform it and generate a force;

[0017] S3, the wire clamp leaves the limit assembly, and the torsion spring that is torsionally deformed releases its force to rotate the shaft and the wire clamp, so that the bottoms of adjacent wire clamps are close to each other to clamp the pole of the lithium battery, thereby achieving connection with the lithium battery. Subsequently, the lithium battery charge and discharge test can be performed through the test cabinet;

[0018] S4. After the test is completed, lift the lithium battery and the first spring releases its force to lift the carrier plate and the frame. Conversely, the wire clamp rises and the limiting component separates the two relative wire clamps, so that the wire clamp rotates with the shaft to reset and the torsion spring torsional deform to generate force. Finally, the wire clamp is separated from the pole and the lithium battery can be removed.

[0019] Technical effects and advantages of the present invention:

[0020] 1. In the whole test process, the present invention only needs to place the lithium battery on the carrier board to realize the automatic connection between the wire clamp and the lithium battery pole, without the need to manually connect multiple wire clamps with the pole, which greatly reduces the workload and saves time and effort;

[0021] 2. The present invention can adjust the height of the lithium battery by adjusting the components, and can adaptively adjust the spacing between the wire clamps to meet the testing of lithium batteries of different sizes. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A schematic diagram showing the structure of a lithium battery testing device according to an embodiment of the present invention is shown;

[0023] Figure 2 A partial cross-sectional structural schematic diagram of a lithium battery testing device according to an embodiment of the present invention is shown;

[0024] Figure 3 The embodiment of the present invention is shown Figure 2 The enlarged structural diagram at A in the middle;

[0025] Figure 4 The embodiment of the present invention is shown Figure 3 The enlarged structural diagram at B in the middle;

[0026] Figure 5 A schematic diagram showing the structure of the framework of an embodiment of the present invention is shown;

[0027] Figure 6 The embodiment of the present invention is shown Figure 5 The enlarged structural diagram at C in the middle;

[0028] Figure 7 A schematic structural diagram of a slider and a side plate assembly according to an embodiment of the present invention is shown;

[0029] Figure 8 A schematic structural diagram of a placement plate and a screw rod assembly according to an embodiment of the present invention is shown;

[0030] In the figure: 1. test cabinet; 2. frame; 3. carrier plate; 4. slide column; 5. limit plate; 6. first spring; 7. slider; 8. side plate; 9. transverse groove; 10. connecting block; 11. bracket; 12. limit block; 13. rotating shaft; 14. torsion spring; 15. wire clamp; 16. magnet bar; 17. placement plate; 18. screw rod; 19. guide plate; 20. plane; 21. inclined plane; 22. slide rod; 23. second spring. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the embodiments of the present invention more clear, the technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments.

[0032] The present invention provides a lithium battery testing device, such as Figures 1 to 8 As shown, it includes a test cabinet 1, and the interior of the test cabinet 1 is equidistantly provided with partitions. The test cabinet 1 is a lithium battery testing cabinet used for testing the charging and discharging performance of lithium batteries in the prior art. The bottom wall of the partition is equidistantly provided with grooves, and a carrier plate 3 is provided in the groove. A frame 2 is fixedly installed on the top of the carrier plate 3. Slide columns 4 are fixedly installed at the four corners of the bottom wall of the groove. The top of the slide column 4 extends through the carrier plate 3 to the top thereof and a limit plate 5 is fixedly installed. A first spring 6 is fixedly installed at the bottom of the carrier plate 3. Slide grooves are equidistantly provided on the top wall of the partition, and sliders 7 are symmetrically slidably installed in the slide grooves. Side plates 8 are symmetrically fixedly installed at the bottom of the sliders 7. The upper parts of the inner walls on both sides of the frame 2 are provided with transverse grooves, and the transverse grooves are fixedly installed on the upper parts of the inner walls on both sides of the frame 2. A connecting block 10 is symmetrically and slidably installed in the groove 9, a bracket 11 is fixedly installed between the front and rear two opposite connecting blocks 10, a limiting block 12 is fixedly installed on the top of the bracket 11, a rotating shaft 13 is symmetrically and rotatably installed on the bracket 11, both ends of the rotating shaft 13 are extended to the outer sleeve of the bracket 11 and a torsion spring 14 is provided, and the two ends of the torsion spring 14 are respectively fixedly connected to the rotating shaft 13 and the bracket 11, and a wire clamp 15 is provided on the external fixed sleeve of the rotating shaft 13. The wire clamp 15 is a wire clamp used for connecting to the battery pole on the lithium battery test cabinet in the prior art, and a limiting component for limiting the wire clamp 15 is provided on the outside, and an adjustment component for adjusting the height of the placed battery is provided on the carrier plate 3.

[0033] When in use, pass the pole of the lithium battery to be tested through the two pairs of wire clamps 15, then place the lithium battery on the carrier 3, and then release your hand. Under the action of gravity, the lithium battery descends with the carrier 3, frame 2, connecting block 10, bracket 11, limiting block 12, rotating shaft 13, and wire clamp 15. The carrier 3 compresses the first spring 6 to deform it and generate a force, and the wire clamp 15 leaves the limiting component. At this time, the torsion spring 14 that has been twisted and deformed releases the force to rotate the rotating shaft 13 and the wire clamp 15, so that the bottoms of adjacent wire clamps 15 are close to each other to clamp the pole of the lithium battery, thereby achieving connection with the lithium battery. Then, the charging and discharging test of the lithium battery can be carried out through the test cabinet 1. After the test is completed, hold the lithium battery to make it rise, and the first spring 6 releases the force to raise the carrier 3 and frame 2. Conversely, the wire clamp 15 rises, and the limiting component will The two opposing wire clamps 15 are separated, so that the wire clamps 15 rotate and reset with the rotating shaft 13, and at the same time, the torsion spring 14 is twisted and deformed to generate a force, and finally the wire clamps 15 are separated from the poles, and the lithium battery can be removed. The whole process only requires placing the lithium battery on the carrier plate 3 to realize the automatic connection between the wire clamps 15 and the lithium battery poles, and there is no need to manually connect multiple wire clamps 15 with the poles, which greatly reduces the workload and saves time and effort. When the size of the lithium battery is small, the height of the lithium battery can be adjusted by adjusting the assembly, and the movable side plate 8 moves with the slider 7, the limiting block 12, the bracket 11, the rotating shaft 13, and the wire clamps 15, so that the spacing between the two pairs of wire clamps 15 can be adjusted, so that it can adapt to the test of small-sized lithium batteries. When the smallest-sized lithium battery is placed on the carrier plate 3, the carrier plate 3 can be lowered to the bottom by weight.

[0034] like Figure 6 As shown, the limiting assembly includes a magnet bar 16, a mounting groove is provided at the lower outer side of the wire clamp 15, the magnet bar 16 is fixedly installed inside the mounting groove, and the side plate 8 is made of iron.

[0035] The wire clamp 15 descends with the magnet bar 16, so that the magnet bar 16 leaves the side plate 8. At this time, the adsorption between the magnet bar 16 and the side plate 8 is cancelled, and the twisted torsion spring 14 rotates with the rotating shaft 13 and the wire clamp 15, so that the bottoms of the two adjacent wire clamps 15 are close to each other to clamp the pole, and the wire clamp 15 rises with the magnet bar 16. When the magnet bar 16 moves to the side plate 8, the magnet bar 16 adsorbs the side plate 8 and rotates with the rotating shaft 13, and the twisted torsion spring 14 is twisted to deform it, and finally the magnet bar 16 is adsorbed to the side plate 8.

[0036] like Figure 6 As shown, the magnetic force of the magnet strip 16 can overcome the torsion force of the torsion spring 14 and adsorb to the inner side of the side plate 8 .

[0037] like Figure 3 and Figure 8As shown, the adjustment assembly includes a placement plate 17, openings are provided on both sides of the frame 2, and both sides of the placement plate 17 are slidably arranged in the openings. Operation openings are provided on both sides of the frame 2 and above the openings. A screw rod 18 is symmetrically rotatably installed on the top of the carrier plate 3, and both sides of the placement plate 17 are threadedly sleeved outside the screw rod 18. The top of the screw rod 18 extends to the operation opening and is fixedly installed with a knob.

[0038] Turning the two knobs forward causes the two lead screws 18 to rotate in the same direction, thereby causing the placement plate 17 to rise. Turning the two knobs reversely can cause the placement plate 17 to descend, thereby adjusting the height of the placement plate 17. Subsequently, the lithium battery can be placed on the placement plate 17 to adapt to the testing of lithium batteries of different sizes.

[0039] like Figure 3 , Figure 5 and Figure 6 As shown, a guide plate 19 is fixedly installed on one side of the side plate 8 close to the center of the frame 2. The guide plate 19 is located on the side of the side plate 8 close to the wire clamp 15. A slide rod 22 is fixedly installed in the slide groove. The slider 7 is slidably sleeved outside the slide rod 22. The outer part of the slide rod 22 is sleeved with a second spring 23. The second spring 23 is located between the two sliders 7.

[0040] When testing a small-sized lithium battery, the pole of the lithium battery can be brought into contact with the guide plate 19, and the lithium battery can be moved to the middle of the placement plate 17. The pole cooperates with the guide plate 19 to squeeze the side plate 8, and the slider 7, the limiting block 12, the bracket 11, the rotating shaft 13, and the wire clamp 15 move accordingly, so that the two pairs of wire clamps 15 move closer to each other, so as to automatically adapt to the distance between the two poles on the lithium battery. When the slider 7 moves, the second spring 23 is compressed to deform it and generate a force. When the lithium battery is taken away, the second spring 23 releases the force and resets the slider 7. Conversely, the wire clamp 15 can be reset.

[0041] like Figure 5 and Figure 6 As shown, a plane 20 that fits with the inner side of the wire clamp 15 is provided on one side of the guide plate 19 close to the wire clamp 15 , and an inclined surface 21 that connects with the plane 20 is provided on one side of the guide plate 19 away from the plane 20 .

[0042] After the pole collides with the inclined surface 21, the guide plate 19 is squeezed along the inclined surface 21 so that it moves with the side plate 8 toward the center of the frame 2. Then, the pole contacts the plane 20 and moves to the inside of the wire clamp 15 to collide with it, so that the distance between the two poles on the small-sized lithium battery can be adaptively adjusted.

[0043] like Figure 6 As shown, the torsion force of the torsion spring 14 is greater than the elastic force of the second spring 23 .

[0044] When the wire clamp 15 clamps the pole of the lithium battery, the second spring 23 cannot release the force to push the slider 7 and the side plate 8 to squeeze and rotate the wire clamp 15, ensuring that the wire clamp 15 and the pole can be stably connected.

[0045] The present invention also provides a method for testing a lithium battery using the above-mentioned lithium battery testing device, comprising the following steps:

[0046] S1. When in use, pass the pole of the lithium battery to be tested through the two pairs of wire clamps 15, then place the lithium battery on the carrier 3, and then release your hands;

[0047] S2. Under the action of gravity, the lithium battery descends with the carrier plate 3, the frame 2, the connecting block 10, the bracket 11, the limiting block 12, the rotating shaft 13, and the wire clamp 15, and the carrier plate 3 compresses the first spring 6 to deform it and generate a force;

[0048] S3, the wire clamp 15 leaves the limit assembly, and the torsion spring 14 that is torsionally deformed releases its force to rotate the shaft 13 and the wire clamp 15, so that the bottoms of adjacent wire clamps 15 are close to each other to clamp the pole of the lithium battery, thereby achieving connection with the lithium battery. Subsequently, the charging and discharging test of the lithium battery can be performed through the test cabinet 1;

[0049] S4. After the test is completed, the lithium battery is lifted up, and the first spring 6 releases its force to lift the carrier plate 3 and the frame 2. On the contrary, the wire clamp 15 rises, and the limiting component separates the two relative wire clamps 15, so that the wire clamp 15 rotates and resets with the rotating shaft 13, and at the same time, the torsion spring 14 is twisted and deformed to generate a force, and finally the wire clamp 15 is separated from the pole, and the lithium battery can be removed.

[0050] Working principle: When in use, pass the pole of the lithium battery to be tested through the two pairs of wire clamps 15, then put the lithium battery on the carrier 3, then release your hand, under the action of gravity, the lithium battery with the carrier 3, frame 2, connecting block 10, bracket 11, limiting block 12, shaft 13, wire clamp 15 descend, the carrier 3 compresses the first spring 6 to deform it to generate a force, the wire clamp 15 descends with the magnet bar 16, so that the magnet bar 16 leaves the side plate 8, at this time, the adsorption between the magnet bar 16 and the side plate 8 is cancelled, and the twisted torsion spring 14 rotates the shaft 13 and the wire clamp 15, so that The bottoms of the two adjacent wire clamps 15 are close to each other to clamp the pole to achieve connection with the lithium battery. Then, the charging and discharging test of the lithium battery can be carried out through the test cabinet 1. After the test is completed, the lithium battery is held to rise, and the first spring 6 releases the force to lift the carrier plate 3 and the frame 2, and the wire clamp 15 rises. When the magnet bar 16 moves to the side plate 8, the magnet bar 16 adsorbs the side plate 8 to rotate with the rotating shaft 13, and the torsion spring 14 is twisted to make it twist and deform. Finally, the magnet bar 16 is adsorbed on the side plate 8, and the wire clamp 15 is separated from the pole, and the lithium battery can be removed. The whole process only requires the lithium battery to be removed. The battery is placed on the carrier plate 3, and the automatic connection between the wire clamp 15 and the lithium battery pole can be realized. There is no need to manually connect multiple wire clamps 15 with the poles, which greatly reduces the workload, saves time and effort. When the size of the lithium battery is small, the two knobs are turned forward to make the two screw rods 18 rotate in the same direction, thereby raising the placement plate 17 to adjust the height of the placement plate 17. When testing a small-sized lithium battery, the pole of the lithium battery can be made to contact the guide plate 19. After the pole contacts the inclined surface 21, the guide plate 19 is squeezed along the inclined surface 21 to make it move with the side plate 8 to the direction close to the center of the frame 2. The side plate 8 moves with the slider 7, the limiting block 12, the bracket 11, the rotating shaft 13 and the wire clamp 15, so that the two pairs of wire clamps 15 move closer to each other, so as to automatically adapt to the distance between the two poles on the lithium battery. When the slider 7 moves, the second spring 23 is compressed to deform it and generate a force. Then, the pole contacts the plane 20 and moves to the inside of the wire clamp 15 to contact it, so that the distance between the two poles on the lithium battery of small size can be adaptively adjusted. When the lithium battery is taken away, the second spring 23 releases the force and resets the slider 7, and vice versa, the wire clamp 15 can be reset.

[0051] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them.

Claims

1. A lithium battery testing device, comprising a testing cabinet (1), characterized in that: The interior of the test cabinet (1) is provided with partitions at equal intervals, the bottom wall of the partition is provided with grooves at equal intervals, a carrier plate (3) is provided in the groove, a frame (2) is fixedly installed on the top of the carrier plate (3), four corners of the bottom wall of the groove are fixedly installed with slide columns (4), the top of the slide column (4) passes through the carrier plate (3) and extends to the top of the carrier plate (3) to be fixedly installed with a limit plate (5), a first spring (6) is fixedly installed at the bottom of the carrier plate (3), the top wall of the partition is provided with sliding grooves at equal intervals, a slider (7) is symmetrically slidably installed in the sliding groove, a side plate (8) is symmetrically fixedly installed at the bottom of the slider (7), and the upper part of the front and rear inner walls of the frame (2) is provided with transverse grooves (9), the transverse grooves (9) A connecting block (10) is symmetrically and slidably installed inside, a bracket (11) is fixedly installed between the front and rear opposite connecting blocks (10), a limiting block (12) is fixedly installed on the top of the bracket (11), a rotating shaft (13) is symmetrically and rotatably installed on the bracket (11), both ends of the rotating shaft (13) extend to the outer sleeve of the bracket (11) and are provided with a torsion spring (14), the two ends of the torsion spring (14) are respectively fixedly connected to the rotating shaft (13) and the bracket (11), the outer fixed sleeve of the rotating shaft (13) is provided with a wire clamp (15), the outside of the wire clamp (15) is provided with a limiting component for limiting the wire clamp, and the carrier plate (3) is provided with an adjustment component for adjusting the height of the placed battery.

2. The lithium battery testing device according to claim 1, characterized in that: The limiting assembly comprises a magnet bar (16), a mounting groove is provided at the lower outer side of the wire clamp (15), the magnet bar (16) is fixedly mounted inside the mounting groove, and the side plate (8) is made of iron.

3. The lithium battery testing device according to claim 2, characterized in that: The magnetic force of the magnet strip (16) can overcome the torsion force of the torsion spring (14) and adsorb to the inner side of the side plate (8).

4. The lithium battery testing device according to claim 3, characterized in that: The adjustment assembly comprises a placement plate (17), both sides of the frame (2) are provided with openings, both sides of the placement plate (17) are slidably arranged in the openings, both sides of the frame (2) and above the openings are provided with operating openings, a screw rod (18) is symmetrically rotatably mounted on the top of the carrier plate (3), both sides of the placement plate (17) are threadedly sleeved outside the screw rod (18), and the top of the screw rod (18) extends to the operating opening and is fixedly mounted with a knob.

5. The lithium battery testing device according to claim 4, characterized in that: A guide plate (19) is fixedly installed on one side of the side plate (8) close to the center of the frame (2), and the guide plate (19) is located on the side of the side plate (8) close to the wire clamp (15). A slide rod (22) is fixedly installed in the slide groove, and the slider (7) is slidably sleeved outside the slide rod (22). A second spring (23) is sleeved on the outside of the slide rod (22), and the second spring (23) is located between the two sliders (7).

6. The lithium battery testing device according to claim 5, characterized in that: A plane (20) that fits the inner side of the wire clamp (15) is provided on the side of the guide plate (19) close to the wire clamp (15), and an inclined surface (21) that connects to the plane (20) is provided on the side of the guide plate (19) away from the plane (20).

7. The lithium battery testing device according to claim 1, characterized in that: The torsion force of the torsion spring (14) is greater than the elastic force of the second spring (23).

8. A method for testing a lithium battery using the lithium battery testing device as claimed in claim 7, characterized in that: The steps include: S1. When in use, pass the pole of the lithium battery to be tested through the two pairs of wire clamps (15), then place the lithium battery on the carrier (3), and then release the grip; S2. Under the action of gravity, the lithium battery, along with the carrier plate (3), the frame (2), the connecting block (10), the bracket (11), the limiting block (12), the rotating shaft (13), and the wire clamp (15), descends, and the carrier plate (3) compresses the first spring (6) to deform it and generate a force; S3, the wire clamp (15) leaves the limit assembly, and the torsion spring (14) that is torsionally deformed releases its force to rotate the shaft (13) and the wire clamp (15), so that the bottoms of adjacent wire clamps (15) are close to each other to clamp the pole of the lithium battery, thereby achieving connection with the lithium battery. Subsequently, the charging and discharging test of the lithium battery can be performed through the test cabinet (1); S4. After the test is completed, the lithium battery is lifted up, and the first spring (6) releases its force to lift the carrier plate (3) and the frame (2). On the contrary, the wire clamp (15) lifts up, and the limiting assembly separates the two opposing wire clamps (15), so that the wire clamp (15) rotates and resets with the rotating shaft (13), and at the same time, the torsion spring (14) is twisted and deformed to generate a force, and finally the wire clamp (15) is separated from the pole, and the lithium battery can be removed.

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