Battery welding device

Abstract

The present invention discloses a battery welding device, which includes a first positioning component, a second positioning component and a third positioning component. The first positioning component includes a positioning post, a positioning hole is provided at the center of the positioning post, the positioning post is inserted into the opening, and the inner wall of the accommodating cavity fits against the outer side surface of the positioning post; the second positioning component includes a positioning pin and a first driving member, the first driving member drives the positioning pin to move along a first direction, the first direction is parallel to the length direction of the positioning hole, the positioning pin passes through the positioning hole and is inserted into the central hole of the core, and the end of the positioning post abuts against the surface of the current collector plate; the third positioning component includes a pressing plate, the pressing plate is arranged on the side of the battery away from the positioning post, and the pressing plate abuts against the housing. The positioning post penetrates through the positioning hole, and the positioning post and the positioning pin can also be in contact for positioning. Both the housing and the core can be in contact and positioned through the positioning post and the positioning pin, ensuring that the housing and the core are coaxial, and avoiding position deviation between the current collector plate and the housing.

Description

Technical Field

[0001] The present invention relates to the field of battery processing equipment, and in particular to a battery welding device. Background Art

[0002] A battery includes a core, a current collector plate, a housing, and a top cover. Among them, the core and the current collector plate are both placed in the housing, and the current collector plate is welded to the tab of the core and the housing respectively to achieve electrical conduction between the core and the housing. In a traditional battery welding device, the welding of the housing and the current collector plate lacks effective positioning, resulting in frequent problems such as welding deviation and false welding during welding, causing cost waste and a high defective rate of the battery. Summary of the Invention

[0003] The purpose of the embodiments of the present invention is to provide a battery welding device with good welding quality and a high yield rate of qualified batteries.

[0004] To achieve the above object, the present invention adopts the following technical solutions:

[0005] There is provided a battery welding device for processing a battery. The battery includes a housing, a core, and a current collector plate. An accommodating cavity with one end open is provided in the housing. The core and the current collector plate are both arranged in the accommodating cavity. The current collector plate is connected to the end of the core and is adjacent to the bottom of the accommodating cavity. The battery welding device includes:

[0006] A first positioning component, the first positioning component includes a positioning post, a positioning hole is provided at the center of the positioning post, the positioning post is inserted into the opening, and the inner wall of the accommodating cavity is attached to the outer side surface of the positioning post;

[0007] A second positioning component, the second positioning component includes a positioning pin and a first driving member. The first driving member drives the positioning pin to move along a first direction, and the first direction is parallel to the length direction of the positioning hole. The positioning pin passes through the positioning hole and is inserted into the central hole of the core, and the end of the positioning post abuts against the surface of the current collector plate;

[0008] A third positioning component, the third positioning component includes a pressing plate, the pressing plate is arranged on the side of the battery away from the positioning post, and the pressing plate abuts against the housing to make the bottom of the accommodating cavity abut against the current collector plate.

[0009] As a preferred solution of the battery welding device, the second positioning component further includes an elastic member, the elastic force direction of the elastic member is parallel to the first direction, and the positioning pin is connected to the first driving member through the elastic member.

[0010] As a preferred solution of the battery welding device, the second positioning component further includes a pressure sensor for detecting the thrust of the positioning pin.

[0011] As a preferred solution of the battery welding device, the third positioning component includes a second driving member, and the second driving member is connected to the pressing plate and drives the pressing plate to move along the first direction.

[0012] As a preferred solution of the battery welding device, the first direction is the vertical direction.

[0013] As a preferred solution of the battery welding device, when the positioning pin moves to be separated from the battery, at least a part of the positioning pin is located in the positioning hole.

[0014] As a preferred solution of the battery welding device, the third positioning component further includes a dust removal pipeline. A first light-transmitting hole is provided on the pressing plate, and the welding light passes through the first light-transmitting hole. The first light-transmitting hole is directly opposite to the position of the housing. One end of the dust removal pipeline is communicated with the first light-transmitting hole, and the other end is communicated with a negative pressure pump.

[0015] As a preferred solution of the battery welding device, an air vent joint is further provided on the pressing plate. One end of the air vent joint is communicated with the first light-transmitting hole, and the other end is communicated with a nitrogen source.

[0016] As a preferred solution of the battery welding device, the dust removal pipeline covers the pressing plate. A second light-transmitting hole is provided at a position corresponding to the first light-transmitting hole on the dust removal pipeline, and the welding light sequentially passes through the second light-transmitting hole and the first light-transmitting hole.

[0017] As a preferred solution of the battery welding device, it includes a welding component. The welding component includes a laser, a first slide rail and a third driving member. The laser is slidably arranged on the first slide rail. The third driving member is connected to the laser and drives the laser to move. A plurality of welding stations are provided on the battery welding device, and all the welding stations are arranged at intervals along the length direction of the first slide rail. Each welding station is provided with the first positioning component, the second positioning component and the third positioning component.

[0018] As a preferred solution of the battery welding device, it includes a base

[0019] The first positioning component further includes a first adjusting member. The positioning column is connected to the base through the first adjusting member. The first adjusting member drives the positioning column to move along a second direction, and the second direction forms an angle with the first direction; and / or,

[0020] The second positioning component further includes a second adjusting member. The positioning pin is connected to the first driving member through the second adjusting member. The second adjusting member drives the positioning pin to move along the second direction.

[0021] The beneficial effects of the present invention are as follows: By providing a positioning post and a positioning pin, the positioning post and the positioning pin can respectively come into contact with the housing and the spool for positioning. A positioning hole is provided at the center of the positioning post, and the positioning post penetrates through the positioning hole. The positioning post and the positioning pin can also come into contact for positioning. The housing and the spool can be positioned in contact through the positioning post and the positioning pin, ensuring that the housing and the spool are coaxial, avoiding position offset between the current collecting plate and the housing, and being able to ensure the positioning between the housing and the spool and the welding area of the battery welding device, avoiding welding deviation. By providing a pressing plate, the pressing plate and the positioning pin respectively press against the housing and the current collecting plate from both sides, so that there is a pre-tightening force between the housing and the current collecting plate, avoiding false soldering, ensuring the welding quality, and thus improving the yield rate of the battery. Description of the Drawings

[0022] The present invention will be further described in detail below with reference to the drawings and embodiments.

[0023] Figure 1 Schematic diagram of the battery welding device according to the embodiment of the present invention.

[0024] Figure 2 For Figure 1 Schematic diagram at position A of

[0025] Figure 3 Schematic diagram of the positioning pin, elastic member and second mounting block according to the embodiment of the present invention.

[0026] Figure 4 Schematic diagram of the third positioning assembly according to the embodiment of the present invention.

[0027] Figure 5 Schematic diagram of the pressing plate, air vent joint and dust removal duct according to the embodiment of the present invention.

[0028] Figure 6 Cross-sectional view of the pressing plate, air vent joint and dust removal duct according to the embodiment of the present invention.

[0029] Figure 7 Schematic diagram of the positioning post and the first adjusting member according to the embodiment of the present invention.

[0030] Figure 8 Schematic diagram of the mounting member and the second adjusting member according to the embodiment of the present invention.

[0031] Figure 9 Schematic diagram of the pressing plate, battery, positioning post and positioning pin according to the embodiment of the present invention.

[0032] In the figure:

[0033] 100, base;

[0034] 1. First positioning component; 11. Positioning post; 111. Positioning hole; 12. First adjusting member; 121. First mounting block; 1211. First strip-shaped hole; 122. First mounting seat; 123. First limiting plate; 124. First screw; 125. First differential head; 126. First fastener;

[0035] 2. Second positioning component; 21. Positioning pin; 22. Elastic member; 23. Pressure sensor; 24. Second adjusting member; 241. Second mounting block; 2411. Second strip-shaped hole; 242. Second mounting seat; 243. Second limiting plate; 244. Second screw; 245. Second differential head; 246. Second fastener; 25. Second slide rail; 26. First driving member; 27. Mounting member; 271. Avoidance hole;

[0036] 3. Third positioning component; 31. Pressing plate; 311. First light-transmitting hole; 32. Ventilation joint; 33. Dust removal pipeline; 331. Second light-transmitting hole; 34. Third slide rail; 35. Second driving member;

[0037] 4. Welding component; 41. Laser; 42. First slide rail; 43. Third driving member;

[0038] 51. Housing; 511. Accommodating cavity; 52. Core; 53. Current collecting plate. Detailed implementation manners

[0039] To make the technical problems solved by the present invention, the technical solutions adopted and the achieved technical effects clearer, the technical solutions of the embodiments of the present invention will be further described in detail below with reference to the drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts fall within the protection scope of the present invention.

[0040] In the description of the present invention, unless otherwise clearly defined and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0041] As Figures 1 to 6 shown, a battery welding device provided by the present invention is used for processing batteries. Refer to Figure 9, the battery includes a housing 51, a core 52 and a current collector plate 53. An accommodation cavity 511 with one end open is provided in the housing 51. The core 52 and the current collector plate 53 are both arranged in the accommodation cavity 511. The current collector plate 53 is welded to the end of the core 52, and the current collector plate 53 is adjacent to the bottom of the accommodation cavity 511. The battery welding device includes a first positioning component 1, a second positioning component 2 and a third positioning component 3. The first positioning component 1 includes a positioning post 11. A positioning hole 111 is provided at the center of the positioning post 11. The positioning post 11 is inserted into the opening of the housing 51, and the inner wall of the accommodation cavity 511 is in contact with the outer side surface of the positioning post 11. The second positioning component 2 includes a positioning pin 21 and a first driving member 26. The first driving member 26 drives the positioning pin 21 to move in a first direction. The first direction is parallel to the length direction of the positioning hole 111. The positioning pin 21 passes through the positioning hole 111 and is inserted into the central hole of the core 52. The end of the positioning post 11 abuts against the surface of the current collector plate 53. The third positioning component 3 includes a pressing plate 31. The pressing plate 31 is arranged on the side of the battery away from the positioning post 11. The pressing plate 31 abuts against the housing 51 to make the bottom of the accommodation cavity 511 abut against the current collector plate 53. By providing the positioning post 11 and the positioning pin 21, the positioning post 11 and the positioning pin 21 can be respectively in contact with the housing 51 and the core 52 for positioning. A positioning hole 111 is provided at the center of the positioning post 11, and the positioning post 11 passes through the positioning hole 111. The positioning post 11 and the positioning pin 21 can also be in contact with each other for positioning. At this time, the housing 51 and the core 52 can be in contact with each other for positioning through the positioning post 11 and the positioning pin 21, ensuring that the housing 51 and the core 52 are coaxial, avoiding position deviation between the current collector plate 53 and the housing 51, and being able to ensure the positioning between the housing 51 and the core 52 and the welding area of the battery welding device, avoiding welding deviation. By providing the pressing plate 31, the pressing plate 31 and the positioning pin 21 respectively abut against the housing 51 and the current collector plate 53 from both sides, so that a pre-tightening force is generated between the housing 51 and the current collector plate 53, avoiding false soldering, ensuring the welding quality, and thus improving the yield rate of the battery.

[0042] In this embodiment, the first direction is the vertical direction. At this time, the lengths of the positioning hole 111 and the positioning pin 21 both extend in the vertical direction, and the opening of the housing 51 faces downward. By setting the first direction as the vertical direction, the gravity direction is perpendicular to the radial direction of the battery, which can avoid the influence of gravity on the positioning between the housing 51 and the current collector plate 53 and ensure the welding accuracy.

[0043] Refer to Figure 2 and Figure 7, Further, the battery welding device includes a base 100. The first positioning component 1 further includes a first adjusting member 12. The positioning post 11 is connected to the base 100 through the first adjusting member 12. The first adjusting member 12 drives the positioning post 11 to move in a second direction, and the second direction forms an angle with the first direction. In this embodiment, the second direction is the horizontal direction. By providing the first adjusting member 12, the position of the positioning post 11 can be finely adjusted, which can reduce the assembly accuracy of the battery welding device and the manufacturing cost of the equipment.

[0044] Refer to Figure 7 , Specifically, the first adjusting member 12 includes a first mounting base 122 and a first mounting block 121. The first mounting base 122 is fixed on the base 100. The first mounting block 121 is arranged on the first mounting base 122. The positioning post 11 is fixed on the first mounting block 121. A first strip-shaped hole 1211 is provided on the first mounting block 121, and the length of the first strip-shaped hole 1211 extends in the second direction. A first mounting hole is provided on the first mounting base 122. A first fastener 126 passes through the first strip-shaped hole 1211 and the first mounting hole to fix the first mounting block 121 and the first mounting base 122. The first fastener 126 can be a stud and a nut. A first screw rod 124 is arranged on one side of the first mounting block 121, and the length of the first screw rod 124 extends in the second direction. A first limiting plate 123 is provided on the first mounting base 122. A first differential head 125 is rotatably arranged on the first limiting plate 123, and the first differential head 125 is threadedly connected to the first screw rod 124. In this embodiment, the first limiting plate 123 only restricts the movement of the first differential head 125, and the first limiting plate 123 does not restrict the rotation of the first differential head 125. Rotate the first differential head 125. Under the limiting action of the first limiting plate 123, the rotation of the first differential head 125 causes the first screw rod 124 to drive the first mounting block 121 to move in the second direction. After the position is adjusted, the first fastener 126 can be tightened to fix the position between the first mounting block 121 and the first mounting base 122, and complete the position positioning between the positioning post 11 and the first mounting base 122.

[0045] Refer to Figure 2 and Figure 8 , Correspondingly, the second positioning component 2 can also be provided with a second adjusting member 24. The positioning pin 21 is connected to the first driving member 26 through the second adjusting member 24. The second adjusting member 24 drives the positioning pin 21 to move in the second direction. By providing the second adjusting member 24, the position of the positioning pin 21 can be finely adjusted, which can reduce the assembly accuracy of the battery welding device and the manufacturing cost of the equipment.

[0046] Specifically, the structure of the second adjusting member 24 is similar to that of the first adjusting member 12. The second adjusting member 24 includes a second mounting base 242 and a second mounting block 241. The second mounting base 242 is connected to the first driving member 26. The second mounting block 241 is disposed on the second mounting base 242. The positioning pin 21 is disposed on the second mounting block 241. A second elongated hole 2411 is provided on the second mounting block 241. The length of the second elongated hole 2411 extends along the second direction. A second mounting hole is provided on the second mounting base 242. The second fastener 246 passes through the second elongated hole and the second mounting hole to fix the second mounting block 241 and the second mounting base 242. The second fastener 246 can be a stud and a nut. A second screw rod 244 is provided on one side of the second mounting block 241. The length of the second screw rod 244 extends along the second direction. A second limiting plate 243 is provided on the second mounting base 242. A second differential head 245 is rotatably disposed on the second limiting plate 243. The second differential head 245 is threadedly connected to the second screw rod 244. In this embodiment, the second limiting plate 243 only limits the movement of the second differential head 245 and does not limit the rotation of the second differential head 245. Rotating the second differential head 245, under the limiting action of the second limiting plate 243, the rotation of the second differential head 245 causes the second screw rod 244 to drive the second mounting block 241 to move along the second direction. After the position adjustment is completed, the second fastener 246 can be tightened to fix the position between the second mounting block 241 and the second mounting base 242, thereby completing the position positioning between the positioning pin 21 and the second mounting base 242.

[0047] Referring to Figure 3 , specifically, the second positioning assembly 2 further includes an elastic member 22. The elastic force direction of the elastic member 22 is parallel to the first direction, that is, the elastic force of the elastic member 22 is parallel to the vertical direction. The positioning pin 21 is connected to the first driving member 26 through the elastic member 22. By providing the elastic member 22, the elastic member 22 can provide a buffer space for the positioning pin 21 to avoid excessive impact force between the positioning pin 21 and the busbar plate 53 when the positioning pin 21 moves upward. The setting of the elastic member 22 can also prevent the positioning pin 21 from being over-pressed against the busbar plate 53. When the stroke of the first driving member 26 is too large, the elastic member 22 can contract to avoid excessive pressure between the ejector pin and the busbar plate 53, which may cause damage to the ejector pin or the battery. In this embodiment, the elastic member 22 is a spring.

[0048] Specifically, the second positioning component 2 further includes a pressure sensor 23. The pressure sensor 23 is used to detect the thrust of the positioning pin 21. One end of the elastic member 22 is connected to the positioning pin 21, and the other end is connected to the pressure sensor 23. The pressure sensor 23 can detect the thrust of the positioning pin 21 by detecting the elastic force of the elastic member 22. By providing the pressure sensor 23, the thrust of the positioning pin 21 can be detected at all times, and the pressure between the positioning pin 21 and the busbar plate 53 can be indirectly judged. When the pressure is too high, an alarm can be given in time to avoid overpressure.

[0049] Referring to Figure 8 , further, the second positioning component 2 further includes a mounting member 27. The mounting member 27 is fixed on the second mounting block 241. The elastic member 22 and the pressure sensor 23 are both located inside the mounting member 27. The end of the positioning pin 21 extends out from the avoidance hole 271 on the upper surface of the mounting member 27.

[0050] In this embodiment, the first driving member 26 is an electric cylinder. In other embodiments, the first driving member 26 can also be a power device such as an electric push rod or a cylinder.

[0051] Referring to Figure 2 , under the drive of the first driving member 26, the positioning pin 21 can move up and down in the vertical direction, while the positioning post 11 is fixed in position. Preferably, when the positioning pin 21 moves downward to separate from the battery, at least a part of the positioning pin 21 is located inside the positioning hole 111. It can be that the positioning post 11 penetrates through the positioning hole 111, or the upper end of the positioning pin 21 is located inside the positioning hole 111, as long as the positioning pin 21 does not disengage from the positioning post 11. By providing that at least a part of the positioning pin 21 is located inside the positioning hole 111, the secondary positioning between the positioning pin 21 and the positioning hole 111 when the positioning pin 21 moves upward can be avoided, and the efficiency of the welding operation can be improved. Specifically, the length of the positioning pin 21 can be increased to avoid the positioning pin 21 disengaging from the positioning post 11.

[0052] Further, the second positioning component 2 further includes a second slide rail 25. The second slide rail 25 is fixed on the base 100. The second mounting seat 242 is slidably arranged on the second slide rail 25. The second slide rail 25 can provide guidance for the movement of the positioning pin 21 to avoid the positioning pin 21 from shifting in position.

[0053] Referring to Figure 4 , specifically, the third positioning component 3 includes a second driving member 35. The second driving member 35 is connected to the pressing plate 31 and drives the pressing plate 31 to move in the first direction. By providing the second driving member 35, the second driving member 35 can drive the pressing plate 31 to move in the vertical direction, so that the pressing plate 31 approaches or moves away from the housing 51 of the battery, facilitating the loading and unloading of the battery. In this embodiment, the second driving member 35 is an electric cylinder.

[0054] Preferably, the third positioning component 3 further includes a third slide rail 34 fixed on the base 100. The length of the third slide rail 34 extends in the vertical direction. The pressing plate 31 is slidably arranged on the third slide rail 34. The arrangement of the third slide rail 34 can guide the movement of the pressing plate 31 and prevent the pressing plate 31 from being displaced.

[0055] Further, the battery welding device includes a welding component 4. The welding component 4 includes a laser 41. The welding light emitted by the laser 41 is used for laser welding of the housing 51 and the bus bar 53. The third positioning component 3 further includes a dust removal duct 33. A first light-transmitting hole 311 is provided on the pressing plate 31 for the welding light to pass through. The first light-transmitting hole 311 is directly opposite to the position of the housing 51. One end of the dust removal duct 33 is communicated with the first light-transmitting hole 311, and the other end is communicated with a negative pressure pump (not shown in the figure). By providing the dust removal duct 33, during welding, the welding area can be vacuumed to reduce the influence of dust and impurities generated by welding on the battery quality.

[0056] Specifically, an air vent joint 32 is further provided on the pressing plate 31. One end of the air vent joint 32 is communicated with the first light-transmitting hole 311, and the other end is communicated with a nitrogen source. By providing the air vent joint 32, nitrogen can be introduced into the welding area. Nitrogen is a protective gas. The introduction of nitrogen can isolate the air in the welding area, prevent oxidation due to the high temperature of the metal during welding, and improve the welding quality. During welding, nitrogen enters the first light-transmitting hole 311 through the air vent joint 32 and then flows out from the dust removal duct 33. The outflow of nitrogen can carry dust and other impurities away from the welding area.

[0057] Refer to Figure 5 and Figure 6 Furthermore, the dust removal duct 33 covers the pressing plate 31. A second light-transmitting hole 331 is provided at the position corresponding to the first light-transmitting hole 311 on the dust removal duct 33. The welding light sequentially passes through the second light-transmitting hole 331 and the first light-transmitting hole 311. By providing the dust removal duct 33 to cover the pressing plate 31, the dust and impurities generated by welding can be evacuated from the welding area to the greatest extent, ensuring the cleanliness of the welding area.

[0058] Refer to Figure 1, in this embodiment, the welding assembly 4 further includes a first slide rail 42 and a third driving member 43. The laser 41 is slidably disposed on the first slide rail 42. The third driving member 43 is connected to the laser 41 and drives the laser 41 to move. A plurality of welding stations are provided on the battery welding device, and all the welding stations are spaced along the length direction of the first slide rail 42. A first positioning assembly 1, a second positioning assembly 2, and a third positioning assembly 3 are provided at each welding station. Along the length direction of the first slide rail 42, a total of four welding stations are provided, and a first positioning assembly 1, a second positioning assembly 2, and a third positioning assembly 3 are provided corresponding to each welding station. By providing one laser 41 corresponding to a plurality of welding stations, the laser 41 can sequentially weld the batteries in each welding station. For example, when loading materials synchronously for the four welding stations, the laser 41 first welds the battery in the first welding station from the left. After the welding is completed, the third driving member 43 can directly drive the laser 41 to move right, and the laser 41 immediately welds the battery in the second welding station, and the welding operation can be carried out continuously. In this embodiment, the third driving member 43 is a rodless cylinder. In other embodiments, the third driving member 43 can also be other power devices such as an electric cylinder or an electric push rod.

[0059] In the description herein, it should be understood that the orientation or positional relationships such as "upper", "lower", "left", "right", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present invention. In addition, the terms "first" and "second" are only used for distinction in description and do not have special meanings.

[0060] In the description of this specification, the description with reference to terms such as "one embodiment" and "example" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example.

[0061] In addition, it should be understood that although this specification is described according to embodiments, not each embodiment only includes an independent technical solution. This narrative manner of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0062] The technical principle of the present invention has been described in combination with specific embodiments above. These descriptions are only for explaining the principle of the present invention and cannot be construed as a limitation of the protection scope of the present invention in any way. Based on the explanations herein, those skilled in the art can conceive other specific embodiments of the present invention without creative efforts, and these embodiments will fall within the protection scope of the present invention.

Claims

1. A battery welding device for processing a battery, the battery comprising a housing, a winding core and a current collector plate, wherein an accommodating cavity with one end open is arranged in the housing, the winding core and the current collector plate are both arranged in the accommodating cavity, the current collector plate is connected to the end of the winding core and is adjacent to the bottom of the accommodating cavity, and is characterized in that, Comprising: A first positioning component, the first positioning component includes a positioning post, a positioning hole is provided at the center of the positioning post, the positioning post is inserted into the opening, and the inner wall of the accommodating cavity is attached to the outer side surface of the positioning post; A second positioning component, the second positioning component includes a positioning pin and a first driving member, the first driving member drives the positioning pin to move in a first direction, the first direction is parallel to the length direction of the positioning hole, the positioning pin passes through the positioning hole and is inserted into the central hole of the core, and the end of the positioning post abuts against the surface of the current collecting plate; A third positioning component, the third positioning component includes a pressing plate, the pressing plate is arranged on the side of the battery away from the positioning post, and the pressing plate abuts against the housing to make the bottom of the accommodating cavity abut against the current collecting plate.

2. The battery welding device according to claim 1, wherein The second positioning component further includes an elastic member, the elastic force direction of the elastic member is parallel to the first direction, and the positioning pin is connected to the first driving member through the elastic member.

3. The battery welding device according to claim 1, characterized in that The second positioning component further includes a pressure sensor, and the pressure sensor is used to detect the thrust of the positioning pin.

4. The battery welding device according to claim 1, characterized in that The third positioning component includes a second driving member, and the second driving member is connected to the pressing plate and drives the pressing plate to move in the first direction.

5. The battery welding device according to claim 1, wherein, The first direction is the vertical direction.

6. The battery welding device according to claim 1, wherein When the positioning pin moves and separates from the battery, at least a part of the positioning pin is located in the positioning hole.

7. The battery welding device according to any one of claims 1-6, characterized in that The third positioning component further includes a dust removal duct, a first light-transmitting hole is provided on the pressing plate, the welding light passes through the first light-transmitting hole, the first light-transmitting hole is directly opposite to the housing, one end of the dust removal duct is communicated with the first light-transmitting hole, and the other end is communicated with a negative pressure pump.

8. The battery welding device according to claim 7, characterized in that, An air vent joint is further provided on the pressing plate, one end of the air vent joint is communicated with the first light-transmitting hole, and the other end is communicated with a nitrogen source.

9. The battery welding device according to claim 7, characterized in that, The dust removal duct covers the pressing plate, and a second light-transmitting hole is provided at a position corresponding to the first light-transmitting hole on the dust removal duct, and the welding light passes through the second light-transmitting hole and the first light-transmitting hole in sequence.

10. The battery welding device according to any one of claims 1-6, characterized in that, Comprising a welding component, the welding component includes a laser, a first slide rail and a third driving member, the laser is slidably arranged on the first slide rail, the third driving member is connected to the laser and drives the laser to move, a plurality of welding stations are provided on the battery welding device, all the welding stations are arranged at intervals along the length direction of the first slide rail, and the first positioning component, the second positioning component and the third positioning component are arranged on each welding station.

11. The battery welding device according to any one of claims 1-6, characterized in that, Comprising a base, The first positioning component further includes a first adjusting member, the positioning post is connected to the base through the first adjusting member, the first adjusting member drives the positioning post to move in a second direction, and the second direction forms an angle with the first direction; and / or, The second positioning component further includes a second adjusting member, the positioning pin is connected to the first driving member through the second adjusting member, and the second adjusting member drives the positioning pin to move in the second direction.

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