Tool for welding battery cell pole and busbar

Abstract

The present invention discloses a tool for welding a battery cell pole and a busbar, and relates to the technical field of battery modules. It comprises: a box body, which is a hollow structure, with an opening on its top surface, and is used to place at least one battery cell inside; a top cover, which is arranged on the opening of the box body, and is provided with at least one welding port corresponding to the pole of the at least one battery cell; at least one set of pressing structures, which is arranged on the side of the top cover close to the battery cell; wherein the pressing structure has a first state and a second state. The present invention uses the design of the pressing structure on the box body and the top cover, so that when welding, pressure can be applied to the connecting piece on the busbar through the pressing structure, so that there is no gap between the connecting piece and the battery cell pole, thereby improving the welding quality. In addition, the tooling structure is simple in structure and easy to operate, and precise welding can be performed by using welding tools to pass through the welding ports in sequence.

Description

Technical Field

[0001] The present invention relates to the technical field of battery modules, and in particular to a tool for welding a battery cell pole and a busbar. Background Art

[0002] The power battery pack is one of the secondary structures that make up the power battery system. The power battery module is composed of multiple single cells connected in series and parallel. The busbar is the tool that connects multiple cells in series. It is welded to the terminals of multiple single cells to achieve the connection of multiple single cells in series. After welding, the connection between the busbar and the single cells must be tight. The contact resistance between the busbar connecting piece and the battery terminal must be low, vibration resistance must be high, and the reliability must be high.

[0003] When welding the busbar to the individual battery cells, welding deviation or cold welding is very likely to occur. Therefore, tooling for welding the battery cell poles to the busbar has appeared on the market to assist in welding the busbar to the individual battery cells. For example, patent document CN216720238U, entitled "A Battery Module Assembly Fixture and Battery Module Welding Device," discloses a similar tooling for welding the battery cell poles to the busbar. However, this device has a complex structure, high manufacturing costs, and cumbersome operation. It is also unable to simultaneously press and position multiple connecting pieces on the busbar. Summary of the Invention

[0004] The object of the present invention is to provide a tool for welding a battery cell pole and a busbar to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solutions: a tool for welding a battery cell pole and a busbar, preferably in this technical solution, the box body is a hollow structure with an opening on the top surface, and the interior is used to place at least one battery cell; the top cover is arranged on the opening of the box body, and at least one welding port is correspondingly provided at the pole of the at least one battery cell; at least one set of pressing structures is arranged on a side of the top cover close to the battery cell; wherein the pressing structure has a first state and a second state,

[0006] When the pressing structure is in the first state, the pressing structure absorbs the connecting pieces corresponding one by one to the battery poles of the multiple battery cells, and the multiple connecting pieces are used to form a bus; when the pressing structure is in the second state, the pressing structure is used to make the corresponding battery poles and connecting pieces in close contact.

[0007] In the present technical solution, preferably, the box body has a restriction structure, which is used to restrict the battery module to a set position in the box body, the box body has four side walls, and among the four side walls, the first side wall and the second side wall are arranged opposite to each other, at least one of the first side wall and the second side wall is a movable side panel, and the movable side panel forms the restriction structure, each of the movable side panels is hinged to the box body through a hinge axis, the axis of the hinge axis extends along a first direction, and the first direction is parallel to the side edge of the bottom of the box body connected to the movable side panel; each of the movable side panels has two working states of opening and closing, when the movable side panel is in the closed state, the movable side panel is used to restrict the battery module to the set position in the box body, and when the movable side panel is in the open state, it is used to take and place the battery module in the box body; a locking assembly is arranged between the movable side panel and the box body, and the locking assembly is used to restrict the relative rotation between the movable side panel and the box body around the hinge axis when the movable side panel is in the closed state.

[0008] Preferably in the present technical solution, the locking assembly includes: one / two parallel arc-shaped racks, the axis line of each arc-shaped rack coincides with the axis line of the hinge shaft, and one / two parallel arc-shaped racks are respectively arranged on one side / both sides of the movable side plate along the second direction; gears corresponding one to one with the arc-shaped racks, the gears are rotationally connected with the box body through a fixed shaft, and the axis line of the fixed shaft extends along the first direction, and the gears can be engaged with the arc-shaped racks; an anti-reversal mechanism, the anti-reversal mechanism is arranged between the fixed shaft and the gear, and is used to limit the gear to rotate in only one direction.

[0009] Preferably in the present technical solution, the anti-reversal mechanism includes: a ratchet arranged on the fixed shaft; a circular cavity opened on the gear, the ratchet is located in the circular cavity, and the circular cavity coincides with the axis of the ratchet; a plurality of first springs arranged along the side wall of the circular cavity, and a pawl is also provided on the first spring, the first spring is used to provide the pawl with a force that produces resistance to the outer surface of the ratchet, and the pawl is used to engage with the ratchet when the gear rotates in the opposite direction.

[0010] Preferably in the present technical solution, the locking assembly further includes an unlocking mechanism, and the unlocking mechanism is used to release the meshing state of the gear and the arc-shaped rack.

[0011] Preferably, the unlocking mechanism includes: a strip hole opened on the box body and corresponding one-to-one to the fixed axis, the extension direction of the strip hole is perpendicular to the axial direction of the fixed axis, and the strip hole is adapted to the fixed axis; a fixing rod arranged on the fixed axis, the axial direction of the fixing rod is parallel to the extension direction of the strip hole; a plug-in hole opened in the strip hole, the extension direction of the plug-in hole is parallel to the extension direction of the strip hole, and the plug-in hole is adapted to the fixing rod; a second spring, the second spring is sleeved on the fixing rod, and the second spring is used to provide a force for the fixed axis to move away from the plug-in hole.

[0012] Preferably in the present technical solution, the positioning structure includes: a plurality of positioning rods, the plurality of positioning rods extending along a third direction, the third direction being parallel to the thickness direction of the top cover; and positioning grooves provided on the top cover corresponding one-to-one to the plurality of positioning rods.

[0013] Preferably in the present technical solution, a fixing structure is further provided between the box body and the top cover, and the fixing structure is used to limit relative displacement between the box body and the top cover along the third direction.

[0014] Preferably, the fixing structure includes: a plurality of first hooks arranged on the top cover; and second hooks corresponding one-to-one to the plurality of first hooks, the second hooks being arranged on the box body and being used to be hooked with the first hooks.

[0015] Preferably in the present technical solution, the first hook includes: a first hanging block, the first hanging block extends along the third direction; a limiting groove is provided on the first hanging block; the second hook includes: a hinge block, the hinge block is arranged on the box body; a second hanging block, the second hanging block extends along the third direction, and the second hanging block is hinged to the hinge block; a limiting block is arranged on the second hanging block, the limiting block is adapted to the limiting groove; a fourth spring, the first end of the fourth spring is connected to the second hanging block, the second end of the fourth spring is connected to the box body, and the fourth spring stores potential energy to make the limiting block approach the limiting groove.

[0016] In the present technical solution, the pressing structure preferably includes: a lifting frame, on which a plurality of piston columns are provided, and the axial direction of the piston columns is parallel to the third direction; connecting holes are provided on the top cover and correspond one-to-one with the plurality of piston columns; piston suction cups correspond one-to-one with the plurality of connecting holes, the piston suction cups are provided on the top cover, and the piston columns can generate piston motion with the piston suction cups through the connecting holes;

[0017] A lifting assembly is used to move the lifting frame away from the top cover along a third direction.

[0018] Preferably in the present technical solution, the lifting assembly includes: a plurality of guide columns passing through the lifting frame, the axial center lines of the guide columns extend along the third direction, and the first ends of the guide columns are connected to the top cover; a fixed block and a third spring corresponding one to the plurality of guide columns, the fixed block is arranged at the second end of the guide column, the third spring is sleeved on the guide column, and the first end of the third spring is connected to the fixed block, and the second end of the third spring is connected to the lifting frame.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] This fixture for welding battery cell poles and busbars utilizes a press-on structure on the box body and top cover, enabling precise positioning of the poles and busbars during welding. Furthermore, during welding, the press-on structure applies pressure to the connecting tabs on the busbars, eliminating gaps between the tabs and the poles, thereby improving weld quality. Furthermore, the fixture features a simple structure and is easy to operate, enabling precise welding using welding tools that pass through the welding ports one by one. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A three-dimensional diagram of a movable side panel in a closed state according to an embodiment of the present invention;

[0022] Figure 2 A three-dimensional diagram of an embodiment of the present invention in which the movable side panel is in an open state;

[0023] Figure 3 For the present invention Figure 2 A perspective view with the top cover and positioning rod removed;

[0024] Figure 4 A bottom-view perspective view of the top cover according to an embodiment of the present invention;

[0025] Figure 5 A three-dimensional diagram of the anti-reversal mechanism proposed in an embodiment of the present invention;

[0026] Figure 6 For the present invention Figure 3 Enlarged view of part A;

[0027] Figure 7 A three-dimensional diagram of the cooperation between the piston suction cup and the piston column according to an embodiment of the present invention;

[0028] Figure 8 A three-dimensional diagram of a fixing structure according to an embodiment of the present invention;

[0029] Figure 9 A cross-sectional view of the anti-reversal mechanism according to an embodiment of the present invention;

[0030] Figure 10 A three-dimensional diagram of a box body according to an embodiment of the present invention;

[0031] Figure 11 For the present invention Figure 10 Magnified view of part B.

[0032] In the figure: 100, bottom plate; 101, box body; 102, positioning rod; 103, top cover; 104, positioning groove; 105, welding port; 106, movable side plate; 200, arc-shaped rack; 201, gear; 202, circular cavity; 203, fixed shaft; 204, ratchet; 205, pawl; 206, first spring; 207, strip hole; 208, fixing rod; 209, second spring; 210, lifting rod; 300, connecting hole; 301, piston suction cup; 302, piston column; 303, lifting frame; 304, fixing block; 305, third spring; 400, first hanging block; 401, hinge block; 402, second hanging block; 403, limit block; 404, limit groove; 405, fourth spring. DETAILED DESCRIPTION

[0033] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0034] It should be noted that, in the description of the present invention, the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0035] Furthermore, it should be understood that for the sake of ease of description, the sizes of the various components shown in the drawings are not drawn according to actual proportions. For example, the thickness or width of certain layers may be exaggerated relative to other layers.

[0036] It should be noted that like numbers and letters represent similar items in the following figures, so once an item is defined or described in one figure, it will not need to be further discussed and described in detail in the description of the subsequent figures.

[0037] like Figures 1 to 3As shown, the present invention provides a technical solution: a tool for welding battery cell poles to busbars, comprising a box body 101, a top cover 103, and at least one set of pressing structures. The box body 101 is a hollow structure with an opening on its top surface, which houses at least one battery cell. The top cover 103 is positioned above the opening in the box body 101, and has at least one welding opening 105 corresponding to the pole of at least one battery cell. At least one set of pressing structures is positioned on the side of the top cover 103 near the battery cell. The pressing structures have a first state and a second state. In the first state, the pressing structures attract the connecting tabs corresponding to the poles of the multiple battery cells, which form a busbar. In the second state, the pressing structures secure the corresponding battery cell poles to the connecting tabs. It should be understood that during use, the battery module to be welded is placed within the box body 101, and the restraining structure constrains the battery module. Then, the busbar is adsorbed by the pressing structure on the top cover 103 (the pressing structure is in the first state at this time). After the top cover 103 is placed on the box body 101, the pressing structure is changed from the first state to the second state. At this time, the pressing structure presses all the connecting pieces on the busbar onto the battery module in sequence. Furthermore, the welding equipment can weld the battery poles and the connecting pieces in sequence through the welding port 105. Due to the pressing action of the pressing structure, the battery poles and the connecting pieces can be in close contact. This can effectively avoid the phenomenon of cold welding due to the loose contact between the battery poles and the connecting pieces during the welding process. At the same time, due to the action of the welding port 105, the operator can accurately weld the battery poles and the connecting pieces without the occurrence of cold welding and other phenomena.

[0038] It should be clear that in the present invention, the box body 101 has a restriction structure, and the restriction structure is used to restrict the battery module to a set position in the box body 101. The restriction structure can be any structure. For example, the restriction structure can be a base plate 100, and a groove for restricting the battery module is provided on the base plate 100, which is not shown in the figure. At the same time, the restriction structure can also be a positioning fixture for restricting the battery module disclosed in the patent document with publication number CN216720238U and the name of a battery module assembly fixture and battery module welding device. In the present invention, the restriction structure can be any structure as long as it can prevent the battery module from being displaced during welding.

[0039] like Figure 1 and Figure 2As shown, the present invention proposes a specific restriction structure. Specifically, the box body 101 has four side walls, and among the four side walls, the first side wall and the second side wall are arranged opposite to each other, and at least one of the first side wall and the second side wall is a movable side panel 106. The movable side panel 106 forms a restriction structure, and each movable side panel 106 is hinged to the box body 101 through a hinge shaft. The axis of the hinge shaft extends along a first direction, and the first direction is parallel to the side of the bottom of the box body 101 connected to the movable side panel 106. Each movable side panel 106 has two working states: open and closed. When the movable side panel 106 is in the closed state, the movable side panel 106 is used to limit the battery module to a set position in the box body 101. At this time, as Figure 1 As shown, the entire box body 101 is in a closed state, and the battery module is confined in the box body 101. When the movable side panel 106 is in an open state, it is used to take and place the battery module in the box body 101. Figure 2 As shown, an opening is formed between the movable side plate 106 and the box body 101, and the opening is used for taking in and placing the battery module.

[0040] It should be clear that, through the above structure, although the battery module can be confined inside the box body 101. However, since the movable side panel 106 is hinged to the box body 101. Therefore, during the welding of the battery cell poles and the connecting pieces, the movable side panel 106 still has the possibility of rotation. When the movable side panel 106 rotates, it cannot accurately limit the battery module (i.e., multiple battery cells). Therefore, a locking assembly is also required in the present invention. The locking assembly is arranged between the movable side panel 106 and the box body 101. The battery module is used to limit the relative rotation between the movable side panel 106 and the box body 101 around the hinge axis when the movable side panel 106 is in a closed state.

[0041] It should be understood that, in the present invention, the locking assembly can be of any structure. For example, the locking assembly can be a first positioning hole defined in the movable side panel 106, a second positioning hole defined in the box body 101, and a positioning pin, wherein the axes of the first positioning hole and the second positioning hole both extend along the first direction. When the movable side panel 106 is in the closed state and positioning is required, the positioning pin is sequentially inserted into the first positioning hole and the appropriate second positioning hole, thereby preventing the movable side panel 106 from rotating.

[0042] In a specific embodiment of the present invention, the locking assembly includes: two parallel arc-shaped racks 200, gears 201 corresponding to the arc-shaped racks 200, and an anti-reversal mechanism. The two parallel arc-shaped racks 200 are respectively arranged on both sides of the movable side plate 106 along the second direction. The axis around each arc-shaped rack 200 coincides with the axis of the hinge axis. The gear 201 is rotatably connected to the box body 101 through the fixed shaft 203, and the axis of the fixed shaft 203 extends along the first direction. The gear 201 can be engaged with the arc-shaped rack 200. By setting the gear 201 with the arc-shaped rack 200, the rotation angle of the movable side plate 106 can be more accurately controlled when it rotates. This makes it suitable for different battery modules. The anti-reversal mechanism is arranged between the fixed shaft 203 and the gear 201 to limit the gear 201 to rotate in only one direction. It should be understood that, in other embodiments of the present invention, only one arc-shaped rack 200 and one gear 201 corresponding to the arc-shaped rack 200 may be provided, which will not affect the use of the tooling of the present invention.

[0043] As can be seen from the above, the anti-reverse mechanism is a structure that restricts gear 201 to one-way rotation. Therefore, through the design of the first and second positioning holes, it is easy to imagine that positioning holes can also be provided on gear 201 to limit the position of gear 201 using positioning pins to prevent gear 201 from reversing.

[0044] Specifically, an anti-reversal mechanism is proposed in an embodiment of the present invention. Figure 5 and Figure 9 As shown, the anti-reverse mechanism includes a ratchet 204 mounted on a fixed shaft 203 and a circular cavity 202 formed in a gear 201. The ratchet 204 is located within the circular cavity 202, with the circular cavity 202 and the axis of the ratchet 204 coinciding. Multiple first springs 206 are positioned along the sidewalls of the circular cavity 202, each with a pawl 205 mounted on it. The first springs 206 provide a force for the pawl 205 to contact the outer surface of the ratchet 204. The pawl 205 engages with the ratchet teeth on the ratchet 204 when the gear 201 rotates in the reverse direction.

[0045] It should be noted that the anti-reverse mechanism prevents gear 201 from rotating in the opposite direction. Therefore, when the battery module needs to be removed from the housing 101 after welding, an unlocking mechanism is required. Therefore, the locking assembly also includes an unlocking mechanism, which is used to release the meshing between gear 201 and the arcuate rack 200.

[0046] Specifically, such as Figure 10 and Figure 11As shown, the present invention proposes a specific unlocking mechanism. This unlocking mechanism includes: strip-shaped holes 207 formed on the housing 101 and corresponding one-to-one with a plurality of fixed shafts 203. The strip-shaped holes 207 extend perpendicular to the axial direction of the fixed shafts 203. The strip-shaped holes 207 are adapted to fit the fixed shafts 203. Adaptation here means that the fixed shafts 203 can form a sliding connection with the strip-shaped holes 207 along the direction of their extension. At the same time, the fixed shafts 203 cannot easily escape from the strip-shaped holes 207. Since structures that prevent the shafts from escaping from the holes are common, these structures are not shown in this invention. For example, upper sliding blocks can be provided on either side of the fixed shafts 203 on the strip-shaped holes 207, forming a sliding connection with the housing 101 along the direction of the strip-shaped holes 207. Further details are omitted here. The unlocking mechanism also includes: a fixing rod 208 provided on the fixed shaft 203, a plug hole provided in the strip-shaped holes 207, and a second spring 209. The axial direction of the fixing rod 208 is parallel to the extension direction of the strip-shaped hole 207. The extension direction of the plug hole is parallel to the extension direction of the strip-shaped hole 207, and the plug hole and the fixing rod 208 are compatible. Compatible here means that the plug hole and the fixing rod 208 can form a sliding connection along the extension direction of the strip-shaped hole 207. The second spring 209 is mounted on the fixing rod 208. At the same time, the second spring 209 stores potential energy that allows the fixing rod 208 to be pulled out of the plug hole. The second spring 209 is used to provide a force to move the fixing shaft 203 away from the plug hole.

[0047] It should be understood that the aforementioned fixed rod 208 is inserted into the insertion hole. Therefore, the fixed rod 208 also functions to limit the relative movement of the fixed shaft 203 and the box body 101 along the axis of the fixed shaft 203 and relative rotation around the axis of the fixed shaft 203. When the gear 201 and the arcuate rack 200 need to be disengaged, the fixed shaft 203 is lifted along the extending direction of the bar-shaped hole 207. Under the action of the lifting force, the lifting force overcomes the elastic force of the second spring 209, causing the fixed shaft 203 to rise until the gear 201 and the arcuate rack 200 are in meshing contact. When the gear 201 and the arcuate rack 200 are in meshing contact, the movable side plate 106 can rotate freely again. Furthermore, the lifting force on the fixed shaft 203 is removed, and the fixed shaft 203 is reset under the elastic force of the second spring 209, and can again form a meshing relationship with the arcuate rack 200.

[0048] It should be clear that for the convenience of operation, Figure 3 As shown, multiple fixed shafts 203 on the same side of the box body 101 can be connected together through the lifting rod 210. When the meshing state between the gear 201 and the arc-shaped rack 200 needs to be released, it is only necessary to lift the lifting rod 210. Of course, other non-rod-shaped structures can also be used to replace the lifting rod 210.

[0049] It should be understood that, in the present invention, the pressing structure can be any structure. Figure 2 、 Figure 4 and Figure 7 As shown, in a specific embodiment of the present invention, the pressing structure includes: a lifting frame 303, on which a plurality of piston columns 302 are provided, and the axial direction of the piston columns 302 is parallel to the third direction. Connecting holes 300 corresponding to the plurality of piston columns 302 are provided on the top cover 103, piston suction cups 301 corresponding to the plurality of connecting holes 300, and a lifting assembly. The piston suction cup 301 is provided on the top cover 103, and the piston column 302 can generate piston motion with the piston suction cup 301 through the connecting hole 300. It should be clear that the lifting assembly is used to make the lifting frame 303 move away from the top cover 103 along the third direction. According to the principle of the piston structure, we can know that when the piston column 302 approaches the bottom end of the piston suction cup 301 through the connecting hole 300, the suction force generated by the piston suction cup 301 decreases, and at this time the piston column 302 can generate pressing force. When the piston column 302 moves away from the bottom end of the piston suction cup 301 through the connecting hole 300, negative pressure is generated inside the piston suction cup 301, thereby generating suction force, which can suck up objects.

[0050] like Figure 1 and Figure 2 As shown, in an embodiment of the present invention, the lifting assembly includes: a plurality of guide posts extending through a lifting frame 303, the axis of the guide posts extending along a third direction, and the first ends of the guide posts connected to the top cover 103. A fixed block 304 and a third spring 305 are provided, one for each of the guide posts. The fixed block 304 is disposed at the second end of the guide post, and the third spring 305 is sleeved onto the guide post, with the first end of the third spring 305 connected to the fixed block 304 and the second end of the third spring 305 connected to the lifting frame 303. To press the piston post 302 against an object, the lifting frame 303 is simply pressed, which forces the piston post 302 to move downward in the third direction, thereby pressing the object. When the object needs to be sucked, the pressing force applied to the lifting frame 303 is removed. The lifting frame 303 is then reset under the elastic force of the third spring 305, at which point the piston post 302 generates negative pressure within the piston suction cup 301, allowing the piston suction cup 301 to suck the object.

[0051] Furthermore, it can be seen from the above that the positioning structure of the present invention is to be able to position the top cover 103 and the box body 101. It prevents the battery module located inside the box body 101 from being offset from the busbar located on the top cover 103 during use. Therefore, the positioning structure can be any structure, such as Figure 1 、 Figure 2 and Figure 4As shown, the positioning structure includes: multiple positioning rods 102, which extend along a third direction parallel to the thickness direction of the top cover 103 (in this embodiment, the third direction is the vertical direction). Positioning slots 104 are provided on the top cover 103, corresponding one-to-one with the multiple positioning rods 102. When in use, the positioning slots 104 on the top cover 103 are aligned with the positioning rods 102 to achieve positioning.

[0052] At the same time, in order to further enhance the practicality of the tooling of the present invention. A fixed structure is also provided between the box body 101 and the top cover 103, and the fixed structure is used to limit the relative displacement between the box body 101 and the top cover 103 along the third direction. Preferably, the fixed structure includes: a plurality of first hooks provided on the top cover 103. A second hook corresponding to the plurality of first hooks one by one, the second hook being provided on the box body 101, and the second hook being used to be hooked with the first hook. It can be seen that the first hook and the second hook can be common docking hooks on the market. For example: carriage hooks, etc., which will not be elaborated here.

[0053] Specifically, such as Figure 1 、 Figure 2 and Figure 8 As shown, in an embodiment of the present invention, the first hook includes: a first hanging block 400 and a limiting groove 404 provided on the first hanging block 400, wherein the first hanging block 400 extends along a third direction. The second hook includes: a hinge block 401, a second hanging block 402, and a fourth spring 405, wherein the hinge block 401 is provided on the box body 101. The second hanging block 402 extends along the third direction and is hingedly connected to the hinge block 401. A limiting block 403 is provided on the second hanging block 402, and the limiting block 403 is adapted to the limiting groove 404. The first end of the fourth spring 405 is connected to the second hanging block 402, and the second end of the fourth spring 405 is connected to the box body 101. The fourth spring 405 stores potential energy to move the limiting block 403 closer to the limiting groove 404. Therefore, the fourth spring 405 can enable the limiting block 403 to be engaged in the limiting groove 404 , thereby achieving fixation between the box body 101 and the top cover 103 .

[0054] While 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 these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A tool for welding a battery cell pole and a busbar, characterized in that: include: The box body (101) is a hollow structure with an opening on its top surface, and is used to place at least one battery cell inside; A top cover (103) is provided on the opening of the box body (101), and is provided with at least one welding port (105) corresponding to a pole of the at least one battery cell; At least one set of pressing structures, the pressing structures comprising: A lifting frame (303), wherein a plurality of piston columns (302) are provided on the lifting frame (303), wherein the axial direction of the piston columns (302) is parallel to a third direction; and the third direction is parallel to the thickness direction of the top cover (103); Connecting holes (300) are provided on the top cover (103) and correspond one-to-one with the plurality of piston rods (302); A piston suction cup (301) corresponding one-to-one to the plurality of connection holes (300), the piston suction cup (301) being arranged on the top cover (103), and the piston column (302) being able to generate piston motion with the piston suction cup (301) through the connection holes (300); a lifting assembly, the lifting assembly being used to move the lifting frame (303) away from the top cover (103) along a third direction; in, The pressing structure has a first state and a second state, When the pressing structure is in the first state, the pressing structure absorbs the connecting pieces corresponding to the cell poles of the plurality of cell poles, and the plurality of connecting pieces are used to form a busbar; When the pressing structure is in the second state, the pressing structure is used to make the corresponding battery cell pole and the connecting piece in close contact.

2. The tooling for welding the battery cell pole and busbar according to claim 1, characterized in that: The box body (101) has a limiting structure, and the limiting structure is used to limit the battery module to a set position in the box body (101). The box body (101) has four side walls, and among the four side walls, the first side wall and the second side wall are arranged opposite to each other, and at least one of the first side wall and the second side wall is a movable side plate (106), and the movable side plate (106) forms the limiting structure. Each of the movable side plates (106) is hinged to the box body (101) through a hinge axis, and the axis of the hinge axis extends along a first direction, and the first direction is parallel to the side of the bottom of the box body (101) connected to the movable side plate (106); Each of the movable side panels (106) has two working states: open and closed. When the movable side panel (106) is in the closed state, the movable side panel (106) is used to limit the battery module to a set position in the box body (101). When the movable side panel (106) is in the open state, it is used to take the battery module in the box body (101). A locking assembly is provided between the movable side panel (106) and the box body (101), and is used to limit relative rotation between the movable side panel (106) and the box body (101) around a hinge axis when the movable side panel (106) is in a closed state.

3. The tooling for welding the battery cell pole and busbar according to claim 2, characterized in that: The locking assembly comprises: One / two parallel arc-shaped racks (200), the axis around which each of the arc-shaped racks (200) is arranged coincides with the axis of the hinge shaft, and the one / two parallel arc-shaped racks (200) are respectively arranged on one side / both sides of the movable side plate (106) along the second direction; a gear (201) corresponding one-to-one to the arc-shaped rack (200), the gear (201) being rotationally connected to the box body (101) via a fixed shaft (203), and the axis of the fixed shaft (203) extending along a first direction, and the gear (201) being meshed with the arc-shaped rack (200); An anti-reversal mechanism is provided between the fixed shaft (203) and the gear (201) and is used to limit the gear (201) to rotate in only one direction.

4. The tooling for welding the battery cell pole and busbar according to claim 3, characterized in that: The anti-reversal mechanism comprises: a ratchet (204) disposed on the fixed shaft (203); A circular cavity (202) is provided on the gear (201), the ratchet (204) is located in the circular cavity (202), and the axis of the circular cavity (202) and the axis of the ratchet (204) coincide with each other; A plurality of first springs (206) are arranged along the side wall of the circular cavity (202), and a pawl (205) is also arranged on the first spring (206). The first spring (206) is used to provide the pawl (205) with a force that causes the pawl to come into contact with the outer surface of the ratchet (204). The pawl (205) is used to engage with the ratchet (204) when the gear (201) rotates in the reverse direction.

5. The tooling for welding battery cell poles and busbars according to claim 4, characterized in that: The locking assembly further comprises an unlocking mechanism, which is used to release the meshing state between the gear (201) and the arc-shaped rack (200).

6. The tooling for welding battery cell poles and busbars according to claim 5, characterized in that: The unlocking mechanism comprises: a strip-shaped hole (207) formed on the box body (101) and corresponding one-to-one with the fixed shaft (203); the extending direction of the strip-shaped hole (207) is perpendicular to the axial direction of the fixed shaft (203); and the strip-shaped hole (207) is adapted to the fixed shaft (203); a fixing rod (208) disposed on the fixing shaft (203), wherein the axial direction of the fixing rod (208) is parallel to the extending direction of the strip-shaped hole (207); A plug-in hole is provided in the strip-shaped hole (207), wherein the extending direction of the plug-in hole is parallel to the extending direction of the strip-shaped hole (207), and the plug-in hole is adapted to the fixing rod (208); A second spring (209), wherein the second spring (209) is sleeved on the fixing rod (208), and the second spring (209) is used to provide a force for the fixing shaft (203) to move away from the plug hole.

7. The tool for welding a battery cell pole and a busbar according to any one of claims 1 to 5, characterized in that: Also included is a positioning structure, the positioning structure comprising: A plurality of positioning rods (102), wherein the plurality of positioning rods (102) extend along a third direction; Positioning grooves (104) are provided on the top cover (103) and correspond one-to-one with the plurality of positioning rods (102).

8. The tool for welding a battery cell pole and a busbar according to any one of claims 1 to 5, characterized in that: A fixing structure is further provided between the box body (101) and the top cover (103), and the fixing structure is used to limit relative displacement between the box body (101) and the top cover (103) along a third direction.

9. The tooling for welding the battery cell pole and busbar according to claim 8, characterized in that: The fixed structure includes: a plurality of first hooks arranged on the top cover (103); A second hook corresponding one-to-one to the plurality of first hooks, the second hook being arranged on the box body (101), and being used for being hooked with the first hook.

10. The tool for welding the battery cell pole and busbar according to claim 9, characterized in that: The first hook comprises: a first hanging block (400), the first hanging block (400) extending along a third direction; A limiting groove (404) is provided on the first hanging block (400); The second hook includes: A hinge block (401), the hinge block (401) being arranged on the box body (101); A second hanging block (402), the second hanging block (402) extends along a third direction, and the second hanging block (402) is hinged to the hinge block (401); A limiting block (403) is provided on the second hanging block (402), wherein the limiting block (403) is adapted to the limiting groove (404); A fourth spring (405), wherein the first end of the fourth spring (405) is connected to the second hanging block (402), the second end of the fourth spring (405) is connected to the box body (101), and the fourth spring (405) stores potential energy for causing the limiting block (403) to approach the limiting groove (404).

11. The tool for welding battery cell poles and busbars according to claim 1, characterized in that: The lifting assembly comprises: a plurality of guide columns passing through the lifting frame (303), wherein the axis of the guide columns extends along a third direction, and the first ends of the guide columns are connected to the top cover (103); A fixed block (304) and a third spring (305) corresponding to the plurality of guide posts, wherein the fixed block (304) is arranged at the second end of the guide post, the third spring (305) is sleeved on the guide post, and the first end of the third spring (305) is connected to the fixed block (304), and the second end of the third spring (305) is connected to the lifting frame (303).

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