Power battery cell interconnection mechanism

Abstract

The invention relates to the technical field of battery cell interconnection, in particular to a power battery cell interconnection mechanism which comprises a working table, a welding head located above the working table and used for conducting spot welding on electrodes, a clamping mechanism, a first working panel and a second working panel which form an upper-lower double-layer structure, and a motor installed below the working table. A rotating shaft penetrating through the second working panel is installed on an output shaft of the motor, a limiting frame for preliminarily stabilizing a battery is arranged on the first working panel, and a first clamping assembly and a second clamping assembly which are different in clamping mode are arranged on the limiting frame; according to the power battery cell interconnection mechanism, the front face, the back face and the two sides of a battery are clamped, and the two clamping modes are different, so that the protection effect on the battery is improved, the situation that the battery is damaged due to manual holding is avoided, meanwhile, the clamping stability effect on the battery is improved, and the situation that the clamping stability is influenced due to manual holding is avoided; and the stability of battery cell interconnection is further influenced.

Description

Technical Field

[0001] The present invention relates to the technical field of battery cell interconnection, and in particular to a power battery battery cell interconnection mechanism. Background Art

[0002] The battery cell is the core component of the power battery system. It is connected in series and parallel to form a battery module to increase the power of the power battery system. The current way to interconnect power battery cells is to stack multiple rectangular batteries together, hold them manually to help stabilize them, and then spot weld the positive and negative electrodes together. However, this method of manually holding the stacked batteries for auxiliary stability and then spot welding them has the problem of unstable holding force. Once excessive force is used, the battery pack will be dented and deformed. Once the force is too small, the battery pack will be unstable during the spot welding process, which will affect the firmness of the positive and negative spot welding. Summary of the invention

[0003] The object of the present invention is to provide a power battery cell interconnection mechanism, which improves the protection of the battery by clamping the front and back sides and both sides of the battery in two different clamping methods, avoids damage to the battery caused by human holding, and at the same time improves the clamping stability of the battery, avoids the influence of human holding on the clamping stability, and then affects the stability of the cell interconnection.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a power battery cell interconnection mechanism, comprising a workbench and a welding head for spot welding electrodes located above the workbench, a clamping mechanism, comprising a first working panel and a second working panel forming an upper and lower double-layer structure, a motor is installed below the workbench, a rotating shaft penetrating the second working panel is installed on the output shaft of the motor, a limiting frame for preliminarily stabilizing the battery is provided on the first working panel, a first clamping assembly and a second clamping assembly with different clamping methods are provided on the limiting frame; the first clamping assembly comprises a gear inside the second working panel and located outside the rotating shaft, and also comprises a clamping arm penetrating the second working panel and sliding thereon, a clamping arm meshing with the gear is installed below the clamping arm The toothed plate is connected with the air cylinder column, and the second air cylinder column is provided with an air push disk which moves along the air cylinder column, and the air push disk moves inside the air cylinder column to drive the internal gas to flow to the first air bag and the second air bag respectively; the air push disk includes a first connecting plate and a second connecting plate which are distributed on the outside of the screw rod, and the first connecting plate and the second connecting plate cooperate with each other in the process of following the movement of the air push disk to destroy the balance of the internal gas of the first air bag and the second air bag on the battery pressure.

[0005] Optionally, the second working panel is arranged on the surface of the workbench, and the first working panel is connected with the second working panel via a gas cylinder column.

[0006] Optionally, the first working panel and the second working panel are both provided with sliding grooves for the clamping arms to slide.

[0007] Optionally, one end of the rotating shaft extends to the interior of the second working panel, the tooth plate moves inside the second working panel, and one side of the tooth plate is provided with gear teeth that mesh with the gear.

[0008] Optionally, a clamping piece penetrating the limiting frame is provided above the clamping arm.

[0009] Optionally, the screw rod is fixedly connected to the rotating shaft, and the screw rod is connected to the bearing seat below the air push plate through a ball nut pair.

[0010] Optionally, the outer side of the air push plate slides against the inner wall of the air cylinder column, and connecting pipes are connected on both sides of the internal cavity of the air cylinder column, and the connecting pipes on both sides are connected to the air storage chamber respectively. Grooves are provided on the first connecting plate and the second connecting plate. When the first connecting plate moves to a certain position, it is closed with the connecting pipe on one side and the connection state with the connecting pipe on one side is restored through the groove during continuous movement. When the second connecting plate moves to a certain position, it is connected with the connecting pipe on the other side through the groove and the connection state with the connecting pipe on the other side is closed during continuous movement.

[0011] Optionally, a first timed pressure relief valve and a second timed pressure relief valve are respectively provided on the air storage chambers on both sides.

[0012] Optionally, a drawstring is attached to the inner middle portion of the first airbag, and the other end of the drawstring is connected to the air storage chamber.

[0013] Optionally, a sliding plate is slidably disposed in the middle groove of the first working panel, and a push rod is further disposed on the surface of the air pushing plate which can lift up the sliding plate after moving for a certain period of time.

[0014] Compared with the prior art, the present invention has the following beneficial effects: The present invention clamps the front and back sides of the battery by the first clamping assembly and clamps the two sides of the battery by the second clamping assembly, using two different clamping methods, which on the one hand improves the protection of the stacked battery packs, and on the other hand improves the clamping effect of the battery, avoiding the influence of force problems on the clamping stability by manual holding, thereby affecting the firmness of the positive and negative spot welding.

[0015] The present invention utilizes the elasticity of the first airbag and the second airbag to clamp the two sides of the battery, and cooperates with the first clamping assembly to clamp the front and back sides of the battery, so that the battery can be clamped at multiple angles to improve the stability of battery clamping. In addition, since the two sides of the battery are more easily squeezed and deformed than the front and back sides, the design of the elasticity of the first airbag and the second airbag can, on the one hand, protect and support the two sides of the battery to prevent the sides of the battery from being squeezed and deformed when held manually, and on the other hand, the elastic design can play a buffering role when squeezing and clamping the sides of the battery to prevent excessive pressure on the sides of the battery to cause deformation during squeezing.

[0016] In the process of the air push plate continuously moving upward, the gas only enters the interior of the second airbag through the connecting pipe on the other side to make it continue to expand. Since the second airbag is equipped with a second timed pressure relief valve which releases pressure after reaching a certain pressure, the second timed pressure relief valve will open to release gas after the interior of the second airbag expands to a certain extent. In addition, since the pressure relief port of the second timed pressure relief valve is located on one side of the battery welding position, the gas after pressure relief will quickly cool down the battery welding position to avoid the high temperature of welding affecting the safety of the operator. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0018] Figure 2 It is a partial structural schematic diagram of the present invention.

[0019] Figure 3 It is a partial cross-sectional view of the present invention.

[0020] Figure 4 It is a partial cross-sectional view of the clamping mechanism of the present invention.

[0021] Figure 5 This is one of the partial cross-sectional views of the connection portion between the clamping mechanism and the detection mechanism of the present invention.

[0022] Figure 6 This is the second partial cross-sectional view of the connection portion between the clamping mechanism and the detection mechanism of the present invention.

[0023] Figure 7 For the present invention Figure 6 Enlarged view of part a.

[0024] Figure 8 It is a partial structural schematic diagram of the detection mechanism of the present invention.

[0025] In the figure: 1. workbench; 2. clamping mechanism; 21. first working panel; 22. second working panel; 23. motor; 24. rotating shaft; 25. limiting frame; 26. first clamping assembly; 261. clamping arm; 262. tooth plate; 263. gear; 264. clamping sheet; 27. first clamping assembly; 271. air storage chamber; 272. first air bag; 273. second air bag; 3. detection mechanism; 31. cylinder column; 32. air push disk; 33. screw rod; 34. connecting pipe; 35. sliding disk; 36. first timed pressure relief valve; 37. second timed pressure relief valve; 38. first connecting plate; 39. push rod; 310. pull rope; 311. second connecting plate. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] See also Figure 1 , the present invention provides a power battery cell interconnection mechanism, comprising a workbench 1 and a welding head for spot welding electrodes located above the workbench 1; See also Figure 2 as well as Figure 3 The clamping mechanism 2 includes a first working panel 21 and a second working panel 22 forming an upper and lower double-layer structure. A motor 23 is installed below the workbench 1. A rotating shaft 24 that passes through the second working panel 22 is installed on the output shaft of the motor 23. Please refer to Figure 3 A limiting frame 25 for preliminarily stabilizing the battery is provided on the first working panel 21, and a first clamping assembly 26 and a second clamping assembly 27 with different clamping methods are provided on the limiting frame 25; the front and back sides of the battery are clamped by the first clamping assembly 26, and the two sides of the battery are clamped by the second clamping assembly 27. By using two different clamping methods, on the one hand, the protection of the stacked battery packs is improved, and on the other hand, the clamping effect of the battery is improved, avoiding the influence of the clamping stability due to the strength problem of manual holding, thereby affecting the firmness of the positive and negative spot welding.

[0028] See also Figure 4 and Figure 5 as well as Figure 6The first clamping assembly 26 includes a gear 263 located inside the second working panel 22 and outside the rotating shaft 24, and also includes a clamping arm 261 that penetrates the second working panel 22 and slides thereon, and a toothed plate 262 that meshes with the gear 263 is installed below the clamping arm 261; the second clamping assembly 27 includes air storage chambers 271 distributed on the inner sides of both sides of the limiting frame 25, and the air storage chambers 271 on both sides are respectively connected to the first air bag 272 and the second air bag 273; the second working panel 22 is set on the working panel 22. On the surface of the workbench 1, the first working panel 21 and the second working panel 22 are connected by the gas cylinder column 31, and the first working panel 21 and the second working panel 22 are provided with a slide groove for the sliding of the clamping arm 261, one end of the rotating shaft 24 extends to the inside of the second working panel 22, the tooth plate 262 moves inside the second working panel 22, and one side of the tooth plate 262 is provided with gear teeth meshing with the gear 263, and the upper part of the clamping arm 261 is provided with a clamping piece 264 penetrating the limiting frame 25; The batteries are stacked together and placed in the middle of the limiting frame 25. The limiting frame 25 can be used to pre-arrange the batteries. After the motor 23 is started, the output end of the motor 23 drives the shaft 24 to rotate, the shaft 24 drives the gear 263 to rotate, the gear 263 drives the toothed plate 262 to move through the meshing gear teeth, and the toothed plate 262 drives the clamping arm 261 to move. Figure 4 The clamping arm 261 drives the clamping piece 264 to approach the front and back sides of the battery and contact and squeeze the front side of the battery.

[0029] The detection mechanism 3 includes a cylinder column 31 located between the first working panel 21 and the second working panel 22, one end of the rotating shaft 24 is connected to a screw rod 33 located inside the cylinder column 31, and an air-pushing disk 32 is arranged inside the cylinder column 31 to move along the cylinder column 31. The air-pushing disk 32 moves inside the cylinder column 31 to drive the internal gas to flow to the first air bag 272 and the second air bag 273 respectively; the air-pushing disk 32 includes a first connecting plate 38 and a second connecting plate 311 distributed on the outside of the screw rod 33. The first connecting plate 38 and the second connecting plate 311 cooperate with each other in the process of following the movement of the air-pushing disk 32 to destroy the balance of the internal gas of the first air bag 272 and the second air bag 273 on the battery pressure; refer to Figure 6The rotating shaft 24 drives the screw rod 33 to rotate. Since the screw rod 33 is connected to the bearing seat below the push plate 32 through a ball nut pair, the push plate 32 moves along the screw rod 33 during the rotation of the screw rod 33. At the same time, since the outer side of the push plate 32 slides against the inner wall of the cylinder column 31, the push plate 32 will drive the internal gas to flow to the first air bag 272 and the second air bag 273 through the connecting pipe 34 when sliding inside the cylinder column 31, so that the gas expands and squeezes the two sides of the battery. The battery can be clamped at multiple angles by clamping the two sides of the battery and cooperating with the first clamping assembly 26 to clamp the front and back sides of the battery, thereby improving the stability of the battery clamping. In addition, since the two sides of the battery are more easily squeezed and deformed than the front and back sides, the first airbag 272 and the second airbag 273 are designed to be elastically inflated. On the one hand, the two sides of the battery are protected and supported to prevent the sides of the battery from being squeezed and deformed when held by human power. On the other hand, the elastic design can play a buffering role when squeezing and clamping the sides of the battery, thereby preventing the sides of the battery from being deformed due to excessive pressure caused by squeezing. In addition, the number of gear teeth on the toothed plate 262 can be selected according to the thickness of the stacked batteries. When the gear 263 drives the toothed plate 262 to move to a certain position through the gear teeth, the clamping piece 264 completes the clamping of the front and back sides of the battery, and the last gear tooth is disengaged from the gear 263. Therefore, when the shaft 24 continues to drive the gear 263 to rotate, the gear 263 no longer drives the toothed plate 262 to move through the gear teeth. At the same time, because the clamping arm 261 dampens the sliding on the first working panel 21, the friction between the first working panel 21 and the clamping arm 261 is relatively large. At the same time, the clamping force of the clamping piece 264 on the battery should not be too large, which will avoid the clamping arm 261 sliding in the opposite direction on the first working panel 21 when the gear 263 does not drive the toothed plate 262 to move through the gear teeth, resulting in clamping failure.

[0030] Because the clamping force of the first airbag 272 and the second airbag 273 on both sides of the battery when the airbag 272 and the second airbag 273 expand, and the clamping force of the clamping plate 264 on the front and back sides of the battery are related to the number of rotations of the rotating shaft 24, the rotating shaft 24 is controlled to drive the screw rod 33 to rotate while controlling the speed of the air push plate 32 moving on the screw rod 33 or controlling the number of teeth on the gear plate 262 and the gear 263 to achieve the relationship between the clamping force of the first airbag 272 and the second airbag 273 on both sides of the battery when the airbag 272 and the second airbag 273 expand, and the clamping force of the clamping plate 264 on the front and back sides of the battery, thereby flexibly controlling the clamping force on the front and back sides and both sides of the battery, with strong flexibility and automation.

[0031] The screw rod 33 is fixedly connected to the rotating shaft 24, and the screw rod 33 is connected to the bearing seat under the push plate 32 through a ball nut pair. The outer side of the push plate 32 slides against the inner wall of the cylinder column 31. The two sides of the internal cavity of the cylinder column 31 are connected with connecting pipes 34, and the connecting pipes 34 on both sides are connected with the air storage chamber 271 respectively. Grooves are provided on the first connecting plate 38 and the second connecting plate 311. When the first connecting plate 38 moves to a certain position, it is closed with the connecting pipe 34 on one side and the connecting pipe 34 on one side is restored to a connected state through the groove during continuous movement. When the second connecting plate 311 moves to a certain position, it is connected to the connecting pipe 34 on the other side through the groove and is closed with the connecting pipe 34 on the other side during the continuous movement. The air storage chambers 271 on both sides are respectively provided with a first timing pressure relief valve 36 and a second timing pressure relief valve 37. A pull rope 310 is tied to the inner middle part of the first air bag 272, and the other end of the pull rope 310 is connected to the air storage chamber 271. A sliding plate 35 slides in the middle groove of the first working panel 21, and a push rod 39 is also provided on the surface of the air push plate 32 to lift the sliding plate 35 after moving for a certain period of time. After the first clamping assembly 26 and the second clamping assembly 27 complete the clamping of the battery, the positive and negative electrodes of the battery are welded by the welding head above the workbench 1. After the welding is completed, the motor 23 is started again, and the air pusher 32 moves up along the screw rod 33 again. At the same time, the air pusher 32 drives the first connecting plate 38, the push rod 39 and the second connecting plate 311 to move up. When the first connecting plate 38 moves to a certain position, refer to Figure 6 The first connecting plate 38 will close the connecting tube 34 on one side, and the second connecting plate 311 will remain connected with the connecting tube 34 on the other side through the groove. Therefore, in the process of the air pushing plate 32 continuing to move upward, the gas only enters the interior of the second airbag 273 through the connecting tube 34 on the other side to make it continue to expand. Since the second airbag 273 is equipped with a second timed pressure relief valve 37 for releasing pressure after reaching a certain pressure, the second timed pressure relief valve 37 will open to release gas after the interior of the second airbag 273 expands to a certain extent. In addition, because the pressure relief port of the second timed pressure relief valve 37 is located on one side of the battery welding position, the gas after pressure relief will quickly cool down the battery welding point to prevent the high temperature of welding from affecting the safety of the operator.

[0032] While the second airbag 273 is depressurized, the air push disk 32 continues to allow the gas to enter the second airbag 273 and discharge it. However, after a certain period of depressurization, the air push disk 32 drives the first connecting plate 38 to move and restore the connection state with the connecting pipe 34 on one side through the groove. The second connecting plate 311 will close the connecting pipe 34, so the gas will change its flow direction and only enter the first airbag 272 to expand it. Figure 7Since a pull rope 310 is provided inside the air storage chamber 271, when the first airbag 272 expands, only the two end parts will expand, and the middle part will not expand. Therefore, the two ends of the first airbag 272 expand and squeeze the two end parts on both sides of the battery, thereby squeezing the two end parts of the welded battery, causing the side surfaces to be unevenly pressurized, so that the stability of the welding between the batteries can be detected, and the stability of the interconnection of the battery cells can be improved.

[0033] In addition, the two ends of the first airbag 272 expand and squeeze the two end parts of both sides of the battery, and at the same time, the air push plate 32 drives the push rod 39 to move and then pushes out the slide plate 35, so that the slide plate 35 contacts the bottom of the battery. The smooth surface design of the slide plate 35 can make the battery slide more easily on the surface of the slide plate 35, avoiding that when the two ends of the first airbag 272 expand and squeeze the battery, the friction between the battery and the first working panel 21 and the clamping piece 264 is large, the battery does not move, and the two ends of the first airbag 272 continue to expand and squeeze the battery, causing damage to the battery. In addition, the first airbag 272 is also provided with a first timed pressure relief valve 36 that automatically releases pressure when a certain pressure is reached, to avoid excessive pressure inside the first airbag 272 and causing damage to the battery.

[0034] Working principle: stack the batteries together and place them in the middle of the limiting frame 25. The batteries can be placed neatly in advance by the limitation of the limiting frame 25. After starting the motor 23, the output end of the motor 23 drives the rotating shaft 24 to rotate, the rotating shaft 24 drives the gear 263 to rotate, the gear 263 drives the tooth plate 262 to move through the meshing gear teeth, the tooth plate 262 drives the clamping arm 261 to move, the clamping arm 261 drives the clamping piece 264 to approach the front and back sides of the battery and contact and squeeze, clamping the front side of the battery; the rotating shaft 24 drives the screw rod 33 to rotate, and the air pusher 32 moves along the screw rod 33. When the air pusher 32 slides inside the cylinder column 31, it will drive the internal gas thereof, and flow to the inside of the first air bag 272 and the second air bag 273 through the connecting pipe 34, respectively, so that they expand and squeeze the two sides of the battery.

[0035] After the first clamping assembly 26 and the second clamping assembly 27 complete the clamping of the battery, the positive and negative electrodes of the battery are welded by the welding head above the workbench 1. After the welding is completed, the motor 23 is started again, and the air pusher 32 moves up along the screw rod 33 again. At the same time, the air pusher 32 drives the first connecting plate 38, the push rod 39 and the second connecting plate 311 to move up. When the first connecting plate 38 moves to a certain position, the first connecting plate 38 will close the connecting pipe 34 on one side. At this time, the second connecting plate 311 is connected to the connecting pipe on the other side through the groove. 34 remains connected, so when the air push plate 32 continues to move upward, the gas only enters the interior of the second airbag 273 through the connecting pipe 34 on the other side to make it continue to expand. Since the second airbag 273 is equipped with a second timed pressure relief valve 37 for releasing pressure after reaching a certain pressure, the second timed pressure relief valve 37 will open to release gas after the interior of the second airbag 273 expands to a certain extent. In addition, because the pressure relief port of the second timed pressure relief valve 37 is located on one side of the battery welding position, the gas after pressure relief will quickly cool down the battery welding position.

[0036] While the second airbag 273 is relieving pressure, the air pusher 32 continues to allow gas to enter the interior of the second airbag 273 and discharge it. However, after a certain period of pressure relief, the air pusher 32 drives the first connecting plate 38 to move and restore the connection with the connecting pipe 34 on one side through the groove. The second connecting plate 311 will close the connecting pipe 34. At the same time, the air pusher 32 drives the push rod 39 to move and push out the sliding plate 35, so that the sliding plate 35 contacts the bottom of the battery. Therefore, the gas will change its flow direction and only enter the interior of the first airbag 272 to expand it. Since a pull rope 310 is provided inside the air storage chamber 271, when the first airbag 272 expands, only the two end parts will expand, and the middle part will not expand, so that the two ends of the first airbag 272 will expand and squeeze the two end parts on both sides of the battery, thereby squeezing the two end parts of the welded battery, causing the side surfaces to be unevenly pressurized, and detecting the stability of the welding between the batteries.

[0037] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A power battery cell interconnection mechanism, comprising a workbench (1) and a welding head for spot welding electrodes located above the workbench (1), characterized in that: The clamping mechanism (2) comprises a first working panel (21) and a second working panel (22) forming an upper and lower double-layer structure, a motor (23) is installed below the workbench (1), a rotating shaft (24) penetrating the second working panel (22) is installed on the output shaft of the motor (23), a limiting frame (25) for preliminarily stabilizing the battery is arranged on the first working panel (21), and a first clamping assembly (26) and a second clamping assembly (27) having different clamping modes are arranged on the limiting frame (25); A first clamping assembly (26), comprising a gear (263) located inside the second working panel (22) and outside the rotating shaft (24), and a clamping arm (261) penetrating the second working panel (22) and sliding thereon, wherein a toothed plate (262) meshing with the gear (263) is mounted below the clamping arm (261); The second clamping assembly (27) comprises air storage chambers (271) distributed on the inner sides of two sides of the limiting frame (25), wherein the air storage chambers (271) on both sides are respectively connected to the first air bag (272) and the second air bag (273); The detection mechanism (3) comprises a cylinder column (31) located between a first working panel (21) and a second working panel (22); one end of the rotating shaft (24) is connected to a screw rod (33) located inside the cylinder column (31); an air push disk (32) is provided inside the cylinder column (31) and moves along the cylinder column (31); the air push disk (32) moves inside the cylinder column (31) to drive the gas inside the cylinder column (31) to flow into the first air bag (272) and the second air bag (273); The air push disk (32) comprises a first connecting plate (38) and a second connecting plate (311) which are distributed outside the screw rod (33). The first connecting plate (38) and the second connecting plate (311) cooperate with each other in the process of following the movement of the air push disk (32) to destroy the balance of the internal gas of the first air bag (272) and the second air bag (273) on the battery pressure.

2. A power battery cell interconnection mechanism according to claim 1, characterized in that: The second working panel (22) is arranged on the surface of the working table (1), and the first working panel (21) and the second working panel (22) are connected via a gas cylinder column (31).

3. A power battery cell interconnection mechanism according to claim 1, characterized in that: The first working panel (21) and the second working panel (22) are both provided with sliding grooves for the clamping arms (261) to slide.

4. A power battery cell interconnection mechanism according to claim 1, characterized in that: One end of the rotating shaft (24) extends to the inside of the second working panel (22), the tooth plate (262) moves inside the second working panel (22), and one side of the tooth plate (262) is provided with gear teeth that mesh with the gear (263).

5. A power battery cell interconnection mechanism according to claim 1, characterized in that: A clamping piece (264) penetrating the limiting frame (25) is provided above the clamping arm (261).

6. A power battery cell interconnection mechanism according to claim 1, characterized in that: The screw rod (33) is fixedly connected to the rotating shaft (24), and the screw rod (33) is connected to a bearing seat below the air push plate (32) via a ball nut pair.

7. A power battery cell interconnection mechanism according to claim 1, characterized in that: The outer side of the air push disk (32) slides against the inner wall of the air cylinder column (31), and the inner cavity of the air cylinder column (31) is connected with connecting pipes (34) on both sides, and the connecting pipes (34) on both sides are respectively connected with the air storage chamber (271). The first connecting plate (38) and the second connecting plate (311) are both provided with grooves. When the first connecting plate (38) moves to a certain position, it is closed with the connecting pipe (34) on one side, and the connecting pipe (34) on one side is restored to a connected state through the groove during continuous movement. When the second connecting plate (311) moves to a certain position, it is connected with the connecting pipe (34) on the other side through the groove, and the connecting pipe (34) on the other side is closed during continuous movement.

8. A power battery cell interconnection mechanism according to claim 1, characterized in that: The air storage chambers (271) on both sides are respectively provided with a first timed pressure relief valve (36) and a second timed pressure relief valve (37).

9. A power battery cell interconnection mechanism according to claim 1, characterized in that: A pull rope (310) is tied to the inner middle portion of the first air bag (272), and the other end of the pull rope (310) is connected to the air storage chamber (271).

10. A power battery cell interconnection mechanism according to claim 1, characterized in that: A sliding plate (35) is slidably disposed in the middle groove of the first working panel (21), and a push rod (39) is also disposed on the surface of the air pushing plate (32) for lifting the sliding plate (35) after moving for a certain period of time.

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