Double-out electrode cell structure and assembling device

Abstract

This utility model discloses a dual-electrode battery cell structure and assembly device. The dual-electrode battery cell structure includes a battery cell shell, a battery cell body, and a sealing cover plate. The battery cell shell has a guide port, and a stop plate is provided at one end of the battery cell shell opposite to the guide port. A first electrode post hole is provided on the stop plate. The battery cell body is disposed inside the battery cell shell. After the battery cell body is disposed inside the battery cell shell, the first electrode post at one end of the battery cell body passes through the first electrode post hole. A second electrode post hole is provided on the sealing cover plate, and the second electrode post at the other end of the battery cell body passes through the second electrode post hole. After the sealing cover plate is disposed inside the battery cell shell, it is welded to the battery cell shell to obtain the dual-electrode battery cell structure. This application uses single-sided welding of the battery cell, which reduces welding steps, reduces the channels for foreign object intrusion, and reduces welding protrusions, thereby improving the quality of the battery cell.

Description

Technical Field

[0001] This utility model belongs to the field of battery equipment technology, specifically relating to a dual-electrode cell structure and assembly device. Background Technology

[0002] With the continuous trend towards miniaturization and high performance in modern electronic devices, the performance and quality of battery cells, as key energy storage components, are of paramount importance. Current technologies often involve welding battery covers to both sides of the cell casing to seal the cell and prevent electrolyte leakage. However, this assembly method is cumbersome, time-consuming, and labor-intensive. Foreign objects can easily enter through the gaps on both sides, affecting the cell quality. Furthermore, the casing is prone to deformation when cut at the two openings, impacting the final assembled cell quality. Therefore, it is necessary to provide a battery cell assembly that reduces welding steps and improves cell quality, as well as an apparatus and method for assembling this assembly. Utility Model Content

[0003] To address the shortcomings of existing technologies, the purpose of this utility model is to provide a dual-electrode battery cell structure, assembly device, and assembly method, which solves the problem that the existing technologies involve multiple welding steps and significantly affect the quality of the battery cell.

[0004] According to one aspect of this application, a dual-electrode battery cell structure is disclosed. The dual-electrode battery cell structure includes a battery cell shell, a battery cell body, and a sealing cover. The battery cell shell has a guide opening, and a stop plate is provided at one end of the battery cell shell opposite to the guide opening. A first electrode post hole is provided on the stop plate. The battery cell body is disposed inside the battery cell shell. After the battery cell body is disposed inside the battery cell shell, a first electrode post at one end of the battery cell body passes through the first electrode post hole. A second electrode post hole is provided on the sealing cover, and a second electrode post at the other end of the battery cell body passes through the second electrode post hole. After the sealing cover is disposed inside the battery cell shell, it is welded to the battery cell shell to obtain the dual-electrode battery cell structure.

[0005] According to another aspect of this application, an assembly apparatus is disclosed for assembling the battery cell body and the battery cell casing as described above. The apparatus includes a clamping assembly, a guide groove, a traction member, and a positioning assembly. The clamping assembly is used to clamp the battery cell casing. The guide groove is disposed at the end of the battery cell casing and communicates with the guide port. The traction member is used to pull the battery cell body through the guide groove and the guide port to install it into the battery cell casing. The positioning assembly is used to position the battery cell body before the traction member pulls the battery cell body.

[0006] In some embodiments, the first terminal of the battery cell body has an inner groove on its side. The traction member includes a traction rod and a gripper assembly. The gripper assembly is disposed at the end of the traction rod and includes a first gripper and a second gripper disposed opposite to each other. After the first gripper and the second gripper open with each other, they extend into the inner groove. After the first gripper and the second gripper approach each other, they clamp the first terminal by cooperating with the inner groove, so that the traction member pulls the battery cell body into the battery cell housing under the action of external traction force.

[0007] In some embodiments, a threaded groove is provided on the first terminal of the battery cell body, and the traction member includes a traction rod. One end of the traction rod has an external thread protruding from it. The external thread is helically engaged with the threaded groove. After the external thread is helically engaged with the threaded groove, the traction member pulls the battery cell body into the battery cell housing under the action of an external traction force.

[0008] In some embodiments, a shift fork groove is provided on the first terminal post of the battery cell body. The shift fork groove includes a groove opening and a groove bottom forming a target angle with the groove opening. The traction member includes a traction rod and a shift fork plate. The shift fork plate is formed at the end of the traction rod. After the shift fork plate rotates through the groove opening to the target angle, it engages with the groove bottom. After the shift fork plate engages with the groove bottom, the battery cell body is pulled into the battery cell casing under the action of an external traction force.

[0009] In some embodiments, the outer coating of the first electrode post is spirally assembled with the first electrode post, or the upper and lower parts of the outer coating of the first electrode post are circularly wrapped around the first electrode post, or the upper and lower parts of the outer coating of the first electrode post are notched and wrapped around the first electrode post. When the upper and lower parts of the outer coating of the first electrode post are notched and wrapped around the first electrode post, the sealing cover plates on both sides of the hole of the second electrode post are provided with protrusions for matching the notches of the outer coating, so that after the outer coating is engaged with the first electrode post, the upper and lower parts of the outer coating are wrapped around the notches of the first electrode post.

[0010] In some embodiments, the positioning component includes a first positioning plate and a second positioning plate, which are disposed opposite to each other. Before the first traction member pulls the battery cell body, the first positioning plate and the second positioning plate move relative to each other to position and clamp the first electrode post.

[0011] In some embodiments, the clamping assembly includes a first clamping frame and a second clamping frame. When the first clamping frame and the second clamping frame are closed together, they form a hollow box structure with an opening. The battery cell housing is located in the hollow box structure, and the guide port of the battery cell housing is on the same side as the opening.

[0012] In some embodiments, an explosion-proof valve is provided on the side of the battery cell body, and the battery cell housing includes a receiving portion and an auxiliary portion. The receiving portion is used to receive the battery cell body, and the auxiliary portion is connected to the side plate of the receiving portion. A channel is formed between the auxiliary portion and the side plate of the receiving portion. A drain hole opposite to the explosion-proof valve is provided on the side plate of the receiving portion, and the drain hole communicates with the channel.

[0013] In some embodiments, the guide groove is flared, with the smaller opening of the flared groove communicating with the guide opening of the battery cell housing, and the guide groove is formed at the opening of the hollow housing.

[0014] This solution includes, but is not limited to, the following beneficial effects: (1) The battery cell of this application is a single-sided welding structure, that is, the cover plate is present at one end of the battery cell shell. Only one end of the battery cell shell needs to be welded to complete the battery cell encapsulation. Compared with the traditional double-sided welding process, this structure reduces the welding path by 50%, simplifies the welding steps, and improves the battery cell encapsulation forming efficiency. Moreover, the battery cell shell is only open at one end, which reduces the entry of foreign objects from the gap between the sealing cover plate and the battery cell shell, thus improving the battery cell quality. Furthermore, single-sided welding can reduce the heat from welding on both sides, which causes thermal stress deformation of the battery cell shell, thus improving the battery cell quality. Based on this, the battery cell shell in this application is only open at one end. When the shell is cut, the end plate at the other end provides support, which improves the efficiency of cutting the battery cell shell. (1) The overall resistance to external forces reduces the deformation of the battery cell shell, thereby improving the quality of the assembled battery cell; (2) This application achieves the clamping of the battery cell shell by setting a clamping component, which ensures the stability of the battery cell shell during battery cell assembly and improves the assembly efficiency. In addition, the guide port of the battery cell shell is connected to the guide groove of the assembly device, which plays a guiding role for the battery cell body and improves the smoothness of installation; (3) In this solution, the battery cell body is positioned before the traction component pulls the battery cell body, which reduces the shaking of the battery cell body and improves the positioning accuracy of the traction position of the traction component and the battery cell body; (4) This solution reduces the occurrence of anti-slip situation by the inner groove and the gripper bite; (5) Self-locking is achieved by the screw engagement, which improves the positioning accuracy of the traction position of the traction component and the battery cell body. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0016] Figure 1 This is a schematic diagram of the dual-electrode cell structure according to an embodiment of this application;

[0017] Figure 2 This is a cross-sectional view of the dual-electrode cell structure according to an embodiment of this application;

[0018] Figure 3 This is a schematic diagram of a first pole post according to an embodiment of this application;

[0019] Figure 4 This is another structural schematic diagram of the first pole post according to an embodiment of this application;

[0020] Figure 5 This is a schematic diagram of a traction component according to an embodiment of this application;

[0021] Figure 6 This is another structural schematic diagram of the traction component according to an embodiment of this application;

[0022] Figure 7 This is a schematic diagram of a sealing cover plate according to an embodiment of this application;

[0023] Figure 8 This is another structural schematic diagram of the sealing cover plate according to an embodiment of this application;

[0024] Figure 9 This is a schematic diagram of a battery cell casing according to an embodiment of this application;

[0025] Figure 10 This is another structural schematic diagram of the battery cell casing according to an embodiment of this application;

[0026] Figure 11 This is another structural schematic diagram of the battery cell casing according to an embodiment of this application;

[0027] Figure 12 This is a schematic diagram of the assembly device according to an embodiment of this application;

[0028] Figure 13 This is a schematic diagram of the state of the battery cell casing and battery cell body before assembly according to an embodiment of this application;

[0029] Figure 14 This is a structural schematic diagram of the assembled state of the battery cell casing and the battery cell body according to an embodiment of this application;

[0030] Figure 15 This is a schematic diagram of the spraying structure of the dual-electrode battery cell structure according to an embodiment of this application;

[0031] In the figure, 1-cell body, 11-first terminal post, 111-inner groove, 112-threaded groove, 12-second terminal post, 2-cell outer shell, 21-stop plate, 22-channel, 23-drain hole, 3-sealing cover plate, 31-protrusion, 4-clamping assembly, 5-traction component, 51-traction rod, 52-clamping claw assembly, 521-first clamping claw, 522-second clamping claw, 53-external thread, 6-guide groove, 7-coating, 8-positioning assembly, 81-first positioning plate, 82-second positioning plate, 9-spraying device, 91-spraying abutment rod, 92-spraying frame. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0033] To address the problems existing in the prior art, this application provides a dual-electrode cell structure, specifically, as follows: Figures 1 to 4 As shown, the dual-electrode battery cell structure includes a battery cell shell 2, a battery cell body 1, and a sealing cover 3. The battery cell shell 2 has a guide port, and a stop plate 21 is provided at one end of the battery cell shell 2 opposite to the guide port. A first electrode post 11 hole is provided on the stop plate 21. The battery cell body 1 is disposed inside the battery cell shell 2. After the battery cell body 1 is disposed inside the battery cell shell 2, the first electrode post 11 at one end of the battery cell body 1 passes through the first electrode post 11 hole. A second electrode post 12 hole is provided on the sealing cover 3, and the second electrode post 12 at the other end of the battery cell body 1 passes through the second electrode post 12 hole. After the sealing cover 3 is disposed inside the battery cell shell 2, it is welded to the battery cell shell 2 to obtain the dual-electrode battery cell structure.

[0034] It is understandable that the battery cell has a single-sided welding structure, meaning that the cover plate is present at one end of the battery cell shell 2. Only one end of the battery cell shell 2 needs to be welded to complete the battery cell encapsulation. Compared with the traditional double-sided welding process, this structure reduces the welding path by 50%, simplifies the welding steps, and improves the battery cell encapsulation efficiency. Moreover, since the battery cell shell 2 is only open at one end, it reduces the entry of foreign objects from the gap between the sealing cover plate 3 and the battery cell shell 2, thus improving the battery cell quality. Furthermore, single-sided welding can reduce the heat from welding on both sides, which can cause thermal stress deformation of the battery cell shell 2, thereby improving the battery cell quality. Based on this, since the battery cell shell 2 in this application is only open at one end, the end plate at the other end provides support during shell cutting, improving the overall resistance to external forces during cutting and reducing the deformation of the battery cell shell 2, thereby improving the quality of the assembled battery cell.

[0035] Furthermore, according to another aspect of this application, an assembly apparatus is also disclosed, such as... Figures 5 to 14 As shown, the assembly device is used to assemble the battery cell body 1 and the battery cell shell 2 as described above. The device includes a clamping assembly 4, a guide groove 6, a traction member 5, and a positioning assembly 8. The clamping assembly 4 is used to clamp the battery cell shell 2. The guide groove 6 is located at the end of the battery cell shell 2 and is connected to the guide port. The traction member 5 is used to pull the battery cell body 1 through the guide groove 6 and the guide port to be installed into the battery cell shell 2. The positioning assembly 8 is used to position the battery cell body 1 before the traction member 5 pulls the battery cell body 1.

[0036] In some embodiments, continue reading Figure 3 and Figure 5 The first terminal post 11 of the battery cell body 1 has an inner groove 111 on its side. The traction member 5 includes a traction rod 51 and a gripper assembly 52. ​​The gripper assembly 52 is located at the end of the traction rod 51. The gripper assembly 52 includes a first gripper 521 and a second gripper 522 that are arranged opposite to each other. After the first gripper 521 and the second gripper 522 open up to each other, they extend into the inner groove 111. After the first gripper 521 and the second gripper 522 approach each other, they clamp the first terminal post 11 by cooperating with the inner groove 111, so that the traction member 5 pulls the battery cell body 1 into the battery cell housing 2 under the action of external traction force. For example, the first gripper 521 includes a first extension, a first connecting portion, and a first engaging portion, and the second gripper 522 includes a second extension, a second connecting portion, and a second engaging portion. The first and second extensions extend from the end of the traction rod 51 to both sides. One end of the first connecting portion is connected to the first extension, and the other end of the first connecting portion is connected to the first engaging portion. One end of the second connecting portion is connected to the second extension, and the other end of the second connecting portion is connected to the second engaging portion. The first and second connecting portions are arranged opposite to each other, and the non-connecting ends of the first and second engaging portions extend in opposite directions, forming a gap between the non-connecting ends of the first and second engaging portions after extension. The engagement of the inner groove 111 with the gripper reduces the occurrence of slippage. It is understood that the structure of the gripper assembly 52 described above is only an example, and the way the gripper assembly 52 and the inner groove 111 of the first pole post 11 are matched is only an example. In other feasible solutions, as long as the gripper assembly 52 can perform the clamping and positioning function on the first pole post 11, it is acceptable.

[0037] For example, among other feasible options, such as Figure 4 and Figure 6 As shown, the first terminal post 11 of the battery cell body 1 is provided with a threaded groove. The traction member 5 includes a traction rod 51, one end of which protrudes an external thread 53112. The external thread 53112 is helically engaged with the threaded groove. After the external thread 53112 is helically engaged with the threaded groove, the traction member 5 pulls the battery cell body 1 into the battery cell housing 2 under the action of external traction force. In this example, self-locking is achieved through helical engagement, which improves the positioning accuracy of the traction position between the traction member 5 and the battery cell body 1.

[0038] In some embodiments, a shift fork groove is provided on the first terminal post 11 of the battery cell body 1. The shift fork groove includes a groove opening and a groove bottom forming a target angle with the groove opening. The traction member 5 includes a traction rod 51 and a shift fork plate. The shift fork plate is formed at the end of the traction rod 51. After the shift fork plate rotates through the groove opening to the target angle, it engages with the groove bottom. After the shift fork plate engages with the groove bottom, the battery cell body 1 is pulled into the battery cell housing 2 under the action of external traction force. In one example, the target angle is 20° to 160°. By rotating and locking at 20° to 160°, the resistance to torsional shedding is improved.

[0039] It is understood that the above-mentioned traction member 5 with gripper assembly 52, or traction member 5 with thread, or traction member 5 with shift fork, is only an exemplary illustration of the traction of the battery cell body 1. In other feasible solutions, traction member 5 with suction cup, etc., can also be used to traction the battery cell body 1.

[0040] In some embodiments, continue reading Figure 3 As shown, the adhesive 7 covering the outer side of the first electrode post 11 can be divided into upper and lower parts to cover the first electrode post 11. In another feasible solution, such as Figure 8 As shown, protrusions 31 are provided on the sealing cover plates 3 on both sides of the hole of the second pole post 12. These protrusions 31 are used to form gaps in the upper and lower parts of the adhesive 7 covering the first pole post 11 after the adhesive 7 is engaged with the first pole post 11. It can be understood that after the adhesive 7 covers the first pole post 11, the elasticity of the adhesive 7 reduces the possibility of separation between the adhesive 7 and the first pole post 11.

[0041] In some embodiments, continue reading Figure 12 The positioning component 8 includes a first positioning plate 81 and a second positioning plate 82, which are arranged vertically opposite each other. Before the first traction member 5 pulls the battery cell body 1, the first positioning plate 81 and the second positioning plate 82 move relative to each other to position and clamp the first pole post 11. In one example, the first positioning plate 81 and the second positioning plate 82 are respectively provided with a first arc groove and a second arc groove at their opposite ends. The first arc groove and the second arc groove abut against the upper plate portion and the lower half portion of the first pole post 11, respectively, so as to achieve positioning of the battery cell body 1 by clamping the first pole post 11, reducing the shaking of the battery cell body 1 and improving the positioning accuracy of the traction member 5 and the battery cell body 1.

[0042] In some embodiments, the clamping assembly 4 includes a first clamping frame and a second clamping frame. When the first and second clamping frames are closed together, they form a hollow box structure with an opening. The battery cell housing 2 is located within the hollow box structure, and the guide opening of the battery cell housing 2 is on the same side as the opening. It is understood that by setting the clamping assembly 4 as a first clamping frame and a second clamping frame, it facilitates the clamping of the battery cell housing 2 while also facilitating the release of the battery cell housing 2 after assembly of the battery cell body 1 and the battery cell housing 2. Furthermore, by setting the clamping assembly 4 to clamp the battery cell housing 2, the stability of the battery cell housing 2 during battery cell assembly is ensured, improving assembly efficiency. Additionally, the guide opening of the battery cell housing 2 communicates with the guide groove 6 of the assembly device, guiding the battery cell body 1 and improving installation smoothness.

[0043] In some embodiments, the guide groove 6 is formed at the opening of the hollow housing. For example... Figures 12 to 14 As shown, the guide groove 6 is shaped like a horn, and the small opening of the horn is connected to the guide port of the battery cell casing 2.

[0044] In one feasible embodiment, an explosion-proof valve is provided on the side of the battery cell body 1. The battery cell housing 2 includes a receiving portion and an auxiliary portion. The receiving portion is used to receive the battery cell body 1. The auxiliary portion is connected to the side plate of the receiving portion. A channel 22 is formed between the auxiliary portion and the side plate of the receiving portion. A drainage hole 23 opposite to the explosion-proof valve is provided on the side plate of the receiving portion. The drainage hole 23 communicates with the channel 22. Figure 10 As shown, channel 22 can be configured as two channels 22. One channel 22 is connected to the drainage hole 23 for collecting liquid overflowing from the explosion-proof valve when the battery cell is damaged. The other channel 22 can be equipped with a water-cooling pipe. Furthermore, channel 22 can also be configured as follows: Figure 11 The four channels 22 shown have one channel 22 connected to the drainage hole 23, which is used to collect liquid overflowing from the explosion-proof valve when the battery cell is damaged. The other three channels 22 can be used to install water cooling pipes and heating pipes.

[0045] Furthermore, in other feasible solutions, when an auxiliary part is set next to the side plate, the drainage hole 23 of the explosion-proof valve may not be opened on the side plate. In this case, when two or four channels are formed between the auxiliary part and the side plate of the accommodating part, the channels are designed for water cooling or heating and are not used for drainage.

[0046] According to another aspect of this application, an assembly method is disclosed, which assembles the battery cell body 1 and the battery cell casing 2 based on the aforementioned assembly apparatus. The method includes:

[0047] S1. Control the clamping assembly 4 to clamp the battery cell housing.

[0048] Specifically, the clamping assembly 4 can be controlled by a motor or other power components to control the relative movement of the first clamping frame and the second clamping frame to close, forming a hollow box structure, and enclosing the battery cell shell 2 in the hollow box structure.

[0049] S3. Control the battery cell body 1 to move towards the clamping assembly 4 to the first target position.

[0050] The first target position is a preset position that can be set in advance. The control of the battery cell body 1 can be achieved through transportation via a transport component, and it will be reset after being transported to the first target position.

[0051] S5. At the first target position, the first positioning plate 81 and the second positioning plate 82 of the control positioning component 8 move relative to each other to position the battery cell body 1.

[0052] S7. Control the traction component 5 to move to the first target position and cooperate with the first pole post 11 of the battery cell body 1.

[0053] Specifically, based on the structure of the traction member 5, the control mechanism of the traction member 5 can be determined so that when the traction member 5 is the traction member of the gripper assembly 52 to be gripped, the gripper assembly 52 can be opened and closed; when the traction member 5 is a threaded traction member 5, the thread can be engaged; and when the traction member 5 is the traction member of the shift fork to be shifted, the shift fork can be rotated to the target angle.

[0054] S9. Control the traction component 5 to move from the first target position toward the direction of the cell housing 2 until the cell body 1 is pulled into the cell housing 2. When the cell body 1 moves toward the cell housing 2, the guide groove 6 and the guide port guide the cell body 1.

[0055] S11, control the traction component 5 to disengage from the first terminal 11 of the battery cell body 1 and reset it to the initial position.

[0056] S13, Control clamping assembly 4 to release the cell housing and proceed to the installation of the next cell body 1.

[0057] Specifically, after the cell casing is released, it indicates that the assembly of a cell under the assembly device is complete, and it can proceed to the installation of the next cell body 1, that is, repeating steps S1-S13.

[0058] Furthermore, the application also designed a spraying device 9, which, as... Figure 15 As shown, it includes two spraying abutment rods 91, which are arranged opposite to each other on the spraying frame 92, and are used to abut the battery cell body 1 to achieve double-sided spraying.

[0059] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A dual exit electrode cell structure, characterized by, The dual-electrode battery cell structure includes a battery cell shell (2), a battery cell body (1), and a sealing cover plate (3). The battery cell shell (2) has a guide port. A stop plate (21) is provided at one end of the battery cell shell (2) opposite to the guide port. A first pole post (11) hole is provided on the stop plate (21). The battery cell body (1) is disposed inside the battery cell shell (2). After the battery cell body (1) is disposed inside the battery cell shell (2), the first pole post (11) at one end of the battery cell body (1) passes through the first pole post (11) hole. A second pole post (12) hole is provided on the sealing cover plate (3). The second pole post (12) at the other end of the battery cell body (1) passes through the second pole post (12) hole. The sealing cover plate (3) is welded to the battery cell shell (2) after the battery cell body (1) is disposed inside the battery cell shell (2) to obtain the dual-electrode battery cell structure.

2. An assembling device for the assembly of the electric cell body (1) with the electric cell housing (2) according to claim 1, characterized in that, The device includes a clamping assembly (4), a guide groove (6), a traction member (5), and a positioning assembly (8). The clamping assembly (4) is used to clamp the battery cell housing (2). The guide groove (6) is disposed at the end of the battery cell housing (2) and communicates with the guide port. The traction member (5) is used to pull the battery cell body (1) through the guide groove (6) and the guide port to install it into the battery cell housing (2). The positioning assembly (8) is used to position the battery cell body (1) before the traction member (5) pulls the battery cell body (1).

3. The assembly apparatus of claim 2, wherein, The first pole (11) of the battery cell body (1) has an inner groove (111) on its side. The traction member (5) includes a traction rod (51) and a gripper assembly (52). The gripper assembly (52) is located at the end of the traction rod (51). The gripper assembly (52) includes a first gripper (521) and a second gripper (522) arranged opposite to each other. After the first gripper (521) and the second gripper (522) open each other, they extend into the inner groove (111). After the first gripper (521) and the second gripper (522) approach each other, they clamp the first pole (11) by cooperating with the inner groove (111), so that the traction member (5) pulls the battery cell body (1) into the battery cell shell (2) under the action of external traction force.

4. The assembly apparatus of claim 2, wherein, The first terminal (11) of the battery cell body (1) is provided with a threaded groove (112). The traction member (5) includes a traction rod (51). One end of the traction rod (51) has an external thread (53) protruding from it. The external thread (53) is screwed into the threaded groove (112). After the external thread (53) is screwed into the threaded groove (112), the traction member (5) pulls the battery cell body (1) into the battery cell shell (2) under the action of external traction force.

5. The assembly apparatus of claim 2, wherein, The first terminal post (11) of the battery cell body (1) is provided with a shift fork groove. The shift fork groove includes a groove opening and a groove bottom forming a target angle with the groove opening. The traction member (5) includes a traction rod (51) and a shift fork piece. The shift fork piece is formed at the end of the traction rod (51). After the shift fork piece rotates through the groove opening to the target angle, it engages with the groove bottom. After the shift fork piece engages with the groove bottom, it pulls the battery cell body (1) into the battery cell shell (2) under the action of external traction force.

6. The assembly apparatus according to any one of claims 3-5, characterized in that, The outer coating (7) of the first pole post (11) is spirally assembled with the first pole post (11), or the upper and lower parts of the outer coating (7) of the first pole post (11) are circularly wrapped around the first pole post (11), or the upper and lower parts of the outer coating (7) of the first pole post (11) are notched around the first pole post (11). When the upper and lower parts of the outer coating (7) of the first pole post (11) are notched around the first pole post (11), the sealing cover plate (3) on both sides of the hole of the second pole post (12) is provided with a protrusion (31) for matching the notch of the outer coating (7), so that after the outer coating (7) and the first pole post (11) are engaged, the upper and lower parts of the outer coating (7) are wrapped around the notch of the first pole post (11).

7. The assembly apparatus of claim 2, wherein, The positioning component (8) includes a first positioning plate (81) and a second positioning plate (82). The first positioning plate (81) and the second positioning plate (82) are arranged opposite each other. Before the first traction member (5) pulls the battery cell body (1), the first positioning plate (81) and the second positioning plate (82) move relative to each other to position and clamp the first pole post (11).

8. The assembly apparatus of claim 2, wherein, The clamping assembly (4) includes a first clamping frame and a second clamping frame. The first clamping frame and the second clamping frame are closed to form a hollow box structure with an opening. The battery cell shell (2) is located in the hollow box structure. The guide port of the battery cell shell (2) is on the same side as the opening.

9. The assembly apparatus of claim 2, wherein, An explosion-proof valve is provided on the side of the battery cell body (1). The battery cell housing (2) includes a receiving part and an auxiliary part. The receiving part is used to receive the battery cell body (1). The auxiliary part is connected to the side plate of the receiving part. A channel (22) is formed between the auxiliary part and the side plate of the receiving part. A drain hole (23) opposite to the explosion-proof valve is provided on the side plate of the receiving part. The drain hole (23) is connected to the channel (22).

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