CN116237689A

CN116237689A - Tool for welding battery core electrode column and busbar

Info

Publication number: CN116237689A
Application number: CN202211728385.4A
Authority: CN
Inventors: 吴伟军
Original assignee: Cornex New Energy Co ltd
Current assignee: Cornex New Energy Co ltd
Priority date: 2022-12-30
Filing date: 2022-12-30
Publication date: 2023-06-09

Abstract

The invention discloses a tool for welding a battery core pole and a busbar, and relates to the technical field of battery modules. Comprising the following steps: the box body is of a hollow structure, the top surface of the box body is provided with an opening, and the inside of the box body is used for placing at least one battery cell; the top cover is arranged on the opening of the box body, and at least one welding opening is correspondingly arranged at the pole of the at least one battery cell; at least one group of pressing structures are arranged on one side of the top cover, which is close to the battery cell; wherein the pressing structure has a first state and a second state. According to the invention, through the design of the pressing structures on the box body and the top cover, when welding is carried out, pressure can be applied to the connecting sheet on the busbar through the pressing structures, so that no gap exists between the connecting sheet and the battery core electrode column, and the welding quality is improved. And this frock simple structure, easily operation utilizes the bonding tool to loop through the welding mouth and can carry out accurate welding.

Description

Tool for welding battery core electrode column and busbar

Technical Field

The invention relates to the technical field of battery modules, in particular to a tool for welding a battery core pole and a busbar.

Background

The power battery pack is one of secondary structures forming a power battery system, and the power battery module is formed by assembling a plurality of single battery cells in series-parallel connection. The busbar is a tool for realizing the series connection of a plurality of battery cells, and the busbar is welded with the poles of a plurality of single battery cells to realize the series connection of a plurality of single battery cells. After welding, the connection and the fastening between the bus bar and the single battery core are required, and the connection sheet on the bus bar and the pole of the battery are required to have small contact resistance, high vibration resistance and high firmness.

When the bus bar is welded with the single battery cell, welding deviation, cold joint and the like are very easy to occur. Therefore, a tool for welding the battery cell pole column and the bus bar is arranged on the market to assist the bus bar to be welded with the single battery cell. For example, patent document CN216720238U, entitled battery module assembly jig and battery module welding device, discloses a similar tool for welding a battery cell pole and a bus bar. However, the device has a complex structure, high manufacturing cost and complex operation. Meanwhile, the clamping device cannot simultaneously clamp and position a plurality of connecting pieces on the bus.

Disclosure of Invention

The invention aims to provide a tool for welding a battery cell pole and a busbar, which is used for solving the problems in the background technology.

In order to achieve the above purpose, the present invention provides the following technical solutions: in the technical scheme, the box body is preferably of a hollow structure, the top surface of the box body is provided with an opening, and at least one electric core is placed in the box body; the top cover is arranged on the opening of the box body, and at least one welding opening is correspondingly arranged at the pole of the at least one battery cell; at least one group of pressing structures are arranged on one side of the top cover, which is close to the battery cell; the pressing structure is provided with a first state and a second state, when the pressing structure is in the first state, the pressing structure adsorbs connecting pieces which are in one-to-one correspondence with the battery cell polar posts of the battery cells, and the connecting pieces are used for forming a bus bar; when the pressing structure is in the second state, the pressing structure is used for enabling the corresponding battery core pole and the connecting sheet to be in close contact.

In this technical scheme, preferably, the box body has a limiting structure, the limiting structure is used for limiting the battery module to a set position in the box body, the box body has four side walls, the first side wall and the second side wall are arranged oppositely in the four side walls, at least one of the first side wall and the second side wall is a movable side plate, the movable side plate forms the limiting structure, each movable side plate is hinged with the box body through a hinge shaft, the axis line of the hinge shaft extends along a first direction, and the first direction is parallel to the side edge of the bottom of the box body connected with the movable side plate; each movable side plate has two working states of opening and closing, when the movable side plate is in the closing state, the movable side plate is used for limiting the set position of the battery module in the box body, and when the movable side plate is in the opening state, the movable side plate is used for taking and placing the battery module in the box body; the locking component is arranged between the movable side plate and the box body and is used for limiting the movable side plate to generate relative rotation around the hinge shaft between the movable side plate and the box body when the movable side plate is in a closed state.

Preferably in this technical solution, the locking assembly includes: one or two parallel arc racks, the axis line of each arc rack is overlapped with the axis line of the hinging shaft, and one or two parallel arc racks are respectively arranged at one side or two sides of the movable side plate along the second direction; the gears are in one-to-one correspondence with the arc racks, are in rotary connection with the box body through fixing shafts, the axes of the fixing shafts extend along a first direction, and can be meshed with the arc racks; the anti-reversion mechanism is arranged between the fixed shaft and the gear and used for limiting the gear to rotate in one direction only.

In this technical scheme, preferably, prevent reverse mechanism includes: a ratchet wheel arranged on the fixed shaft; the ratchet wheel is positioned in the circular cavity, and the axis of the circular cavity is coincident with that of the ratchet wheel; the ratchet wheel is characterized by comprising a plurality of first springs arranged along the side wall of the circular cavity, wherein pawls are further arranged on the first springs, the first springs are used for providing force which is inconsistent with the outer surface of the ratchet wheel for the pawls, and the pawls are used for being clamped with the ratchet wheel when the gear reversely rotates.

In this technical scheme, preferably, the locking component still includes release mechanism, release mechanism is used for canceling the gear with the engagement state of arc rack.

Preferably, the unlocking mechanism includes: the strip-shaped holes are formed in the box body and correspond to the fixing shafts one by one, the extending direction of the strip-shaped holes is perpendicular to the axial direction of the fixing shafts, and the strip-shaped holes are matched with the fixing shafts; the fixing rod is arranged on the fixing shaft, and the axial direction of the fixing rod is parallel to the extending direction of the strip-shaped hole; the inserting holes are formed in the strip-shaped holes, the extending direction of the inserting holes is parallel to that of the strip-shaped holes, and the inserting holes are matched with the fixing rods; the second spring is sleeved on the fixing rod and is used for providing force for the fixing shaft far away from the inserting hole.

In this technical scheme, preferably, location structure includes: the positioning rods extend along a first direction, and the first direction is parallel to the thickness direction of the top cover; and the locating grooves are arranged on the top cover and correspond to the locating rods one by one.

In this technical scheme, preferably, still be provided with fixed knot between the box body with the top cap constructs, fixed knot constructs and is used for limiting produce along the relative displacement of first direction between the box body with the top cap.

Preferably, the fixing structure includes: a plurality of first hooks arranged on the top cover; the second hooks are arranged on the box body and are used for being connected with the first hooks in a hanging mode.

In this technical scheme, preferably, first couple includes: a first hooking block extending in a first direction; a limiting groove arranged on the first hanging block; the second hook comprises: the hinge block is arranged on the box body; the second hanging block extends along the first direction and is hinged with the hinge block; the limiting block is arranged on the second hanging block and is matched with the limiting groove; and the first end of the fourth spring is connected with the second hooking block, the second end of the fourth spring is connected with the box body, and potential energy for enabling the limiting block to be close to the limiting groove is stored in the fourth spring.

In this technical scheme, preferably, press the structure and include: the lifting frame is provided with a plurality of piston columns, and the axial direction of each piston column is parallel to the first direction; connecting holes which are arranged on the top cover and correspond to the piston columns one by one; the piston sucking discs are in one-to-one correspondence with the connecting holes, are arranged on the top cover, and the piston column can generate piston movement with the piston sucking discs through the connecting holes;

and a lifting assembly for moving the lifting frame away from the top cover in a first direction.

Preferably in this technical scheme, the lifting assembly includes: the guide posts penetrate through the lifting frame, the axial lines of the guide posts extend along the first direction, and the first ends of the guide posts are connected with the top cover; the guide posts are sleeved with the third springs, the first ends of the third springs are connected with the fixed blocks, and the second ends of the third springs are connected with the lifting frame.

Compared with the prior art, the invention has the beneficial effects that:

this frock is used in welding of electric core utmost point post and busbar has realized when welding electric core utmost point post and busbar through the design of the pressing structure on box body and the top cap, can fix a position electric core utmost point post and busbar through box body and top cap accuracy. Simultaneously when welding, can apply pressure to the connection piece on the busbar through the pressing structure for no clearance between connection piece and the electric core polar column, and then promote welding quality. And this frock simple structure, easily operation utilizes the bonding tool to loop through the welding mouth and can carry out accurate welding.

Drawings

FIG. 1 is a perspective view of a movable side panel in a closed position according to an embodiment of the present invention;

FIG. 2 is a perspective view of a movable side panel in an open state according to an embodiment of the present invention;

FIG. 3 is a perspective view of the present invention with the top cover and positioning rod removed from FIG. 2;

FIG. 4 is a bottom perspective view of a top cover according to an embodiment of the present invention;

FIG. 5 is a perspective view of an anti-reverse mechanism according to an embodiment of the present invention;

FIG. 6 is an enlarged view of portion A of FIG. 3 in accordance with the present invention;

FIG. 7 is a perspective view of the piston cup and piston post mating in accordance with an embodiment of the present invention;

FIG. 8 is a perspective view of a fixing structure according to an embodiment of the present invention;

FIG. 9 is a cross-sectional view of an anti-reverse mechanism according to an embodiment of the present invention;

fig. 10 is a perspective view of a case according to an embodiment of the present invention;

fig. 11 is an enlarged view of section B of fig. 10 in accordance with the present invention.

In the figure: 100. a bottom plate; 101. a case body; 102. a positioning rod; 103. a top cover; 104. a positioning groove; 105. a welding port; 106. a movable side plate; 200. an arc-shaped rack; 201. a gear; 202. a circular cavity; 203. a fixed shaft; 204. a ratchet wheel; 205. a pawl; 206. a first spring; 207. a bar-shaped hole; 208. a fixed rod; 209. a second spring; 210. a lifting rod; 300. a connection hole; 301. a piston sucker; 302. a piston column; 303. lifting the frame; 304. a fixed block; 305. a third spring; 400. a first hooking block; 401. a hinge block; 402. a second hooking block; 403. a limiting block; 404. a limit groove; 405. and a fourth spring.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

It should be noted that, in the description of the present invention, the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, only for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements to be referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.

Furthermore, it should be understood that the dimensions of the various elements shown in the figures are not drawn to actual scale, e.g., the thickness or width of some layers may be exaggerated relative to other layers for ease of description.

It should be noted that like reference numerals and letters refer to like items in the following figures, and thus once an item is defined or illustrated in one figure, no further detailed discussion or description thereof will be necessary in the following description of the figures.

As shown in fig. 1 to 3, the present invention provides a technical solution: tool for welding cell pole and busbar, box 101, top cover 103 and at least one group of pressing structure. The box 101 is hollow, and has an opening on its top surface for accommodating at least one battery cell. The top cover 103 is disposed on the opening of the case 101, and at least one welding opening 105 is correspondingly disposed at the terminal of at least one cell. At least one group of pressing structures are arranged on one side of the top cover 103 close to the battery cell; the pressing structure is provided with a first state and a second state, when the pressing structure is in the first state, the pressing structure adsorbs connecting pieces corresponding to the battery core electrode posts of the battery cores one by one, and the plurality of connecting pieces are used for forming a bus bar. When the pressing structure is in the second state, the pressing structure is used for enabling the corresponding battery core pole and the connecting sheet to be in close contact. It should be clear that, when the invention is used, the battery module to be welded is placed in the box 101, and the battery module is limited by the limiting structure. The busbar is then sucked up by the pressing structure on the top cover 103 (at this time, the pressing structure is in the first state). 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, and at the moment, all the connecting pieces on the bus bar are pressed on the battery module in sequence by the pressing structure. Further, the welding device can weld the cell terminal and the connecting piece in sequence through the welding port 105. Due to the pressing action of the pressing structure, the battery cell pole post and the connecting sheet can be in close contact. And further, the phenomenon of cold joint formed by the fact that the contact between the battery core electrode post and the connecting sheet is not tight in the welding process can be effectively avoided. Meanwhile, due to the effect of the welding port 105, an operator can accurately weld the battery core pole and the connecting sheet, and the phenomena of cold joint and the like cannot occur.

It is apparent that in the present invention, the case 101 has a restriction structure for restricting the battery module to a set position within the case 101. The limiting structure may be any structure. For example: the restriction structure may be a base plate 100, and a groove for restricting the battery module is formed in the base plate 100, not shown. Meanwhile, the limiting structure can be the same as that of a clamp for limiting and positioning the battery module disclosed in patent document with the publication number of CN216720238U and the name of a battery module assembling clamp and a battery module welding device. The limiting structure in the present invention may be any structure as long as it can prevent the battery module from being displaced during welding.

As shown in fig. 1 and 2, the present invention proposes a specific limiting structure, specifically, a box 101 has four side walls, and of the four side walls, a first side wall and a second side wall are disposed opposite to each other, at least one of the first side wall and the second side wall is a movable side plate 106, the movable side plate 106 forms a limiting structure, each movable side plate 106 is hinged to the box 101 through a hinge shaft, an axis line of the hinge shaft extends along a first direction, and the first direction is parallel to a side edge of the bottom of the box 101 connected to the movable side plate 106. Each movable side plate 106 has two operating states of opening and closing. When the movable side plate 106 is in the closed state, the movable side plate 106 is used for limiting the set position of the battery module in the box body 101. At this time, as shown in fig. 1, the entire case 101 is in a closed state, and the battery module is restrained within the case 101. When the movable side plate 106 is in the open state, the battery module in the case 101 is taken and placed. At this time, as shown in fig. 2, an opening is formed between the movable side plate 106 and the case 101, and the opening is used for taking out the battery module.

It is apparent that, with the above-described structure, although the battery module can be limited to the inside of the case 101. But since the movable side plate 106 is hinged with the case 101. The movable side plate 106 is still provided with a possibility of rotation during the welding of the cell terminal and the connecting piece. When the movable side plate 106 rotates, it cannot accurately limit the battery module (i.e. the plurality of battery cells). There is therefore also a need in the present invention to provide a locking assembly. The locking assembly is disposed between the movable side plate 106 and the cassette 101. The battery module is used for limiting the relative rotation between the movable side plate 106 and the box body 101 around the hinge shaft when the movable side plate 106 is in the closed state.

Meanwhile, it should be apparent that the locking assembly may be of any structure in the present invention. For example: the locking assembly may be a first positioning hole formed on the movable side plate 106, a second positioning hole formed on the box body 101, and a positioning pin, wherein: the axial leads of the first positioning hole and the second positioning hole extend along the first direction. When the movable side plate 106 is in the closed state, the positioning pins are sequentially inserted into the first positioning holes and the proper second positioning holes when positioning is needed. Thereby preventing the movable side plate 106 from rotating.

In a specific embodiment of the present invention, the locking assembly comprises: two parallel arc racks 200, a gear 201 corresponding to the arc racks 200 one by one and an anti-reverse mechanism. Two parallel arc racks 200 are respectively disposed on both sides of the movable side plate 106 in the second direction. The axis line of each arc-shaped rack 200 is coincident with the axis line of the hinge shaft. The gear 201 is rotatably connected with the box body 101 through the fixing shaft 203, and the axis of the fixing shaft 203 extends along the first direction, and the gear 201 can be meshed with the arc-shaped rack 200. Through the arrangement of the gear 201 and the arc-shaped rack 200, the rotating angle control of the movable side plate 106 can be more accurate when the movable side plate rotates. So as to enable it to be applied to different battery modules. The anti-reverse mechanism is disposed between the fixed shaft 203 and the gear 201 for restricting the gear 201 from rotating only in one direction. It should be clear 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 does not affect the use of the tool of the present invention.

As described above, the anti-reverse mechanism is configured to restrict the gear 201 from rotating only in one direction. Therefore, the first positioning hole and the second positioning hole are designed. It is easy to think that the gear 201 may be prevented from reversing by limiting the position of the gear 201 by a positioning pin by forming a positioning hole in the gear 201.

Specifically, an anti-reverse mechanism is provided in an embodiment of the present invention. As shown in fig. 5 and 9, the reverse rotation preventing mechanism includes: a ratchet 204 arranged on the fixed shaft 203 and a circular cavity 202 arranged on the gear 201. The ratchet 204 is positioned within the circular cavity 202, and the circular cavity 202 coincides with the axis of the ratchet 204. A plurality of first springs 206 are disposed along the side walls of the circular cavity 202, and pawls 205 are also disposed on the first springs 206. The first spring 206 is used to provide a force to the pawl 205 that interferes with the outer surface of the ratchet 204. The pawl 205 is used to engage with the ratchet teeth on the ratchet 204 when the gear 201 rotates in the opposite direction.

It should be clear that the gear 201 cannot be rotated in the reverse direction due to the arrangement of the anti-reverse mechanism. Therefore, when the battery module needs to be taken out of the case 101 after the welding is completed, an unlocking mechanism is needed. The locking assembly thus also unlocks the mechanism for releasing the engagement of the gear 201 and the curved rack 200.

Specifically, as shown in fig. 10 and 11, the present invention proposes a specific unlocking mechanism. The unlocking mechanism comprises: and strip-shaped holes 207 which are formed in the box body 101 and correspond to the fixing shafts 203 one by one. The extending direction of the bar-shaped hole 207 is perpendicular to the axial direction of the fixed shaft 203. The bar-shaped hole 207 is adapted to the stationary shaft 203. The adaptation proposed here means that the stationary shaft 203 can form a sliding connection with the strip-shaped hole 207 in the extension direction of the strip-shaped hole 207. At the same time, the fixed shaft 203 cannot be easily separated from the bar-shaped hole 207, and the structure for preventing the shaft from being separated from the hole is common, so the structure is not shown in the present invention. For example: upper sliding blocks may be provided on both sides of the fixed shaft 203 at the bar-shaped hole 207, the sliding blocks forming a sliding connection with the case 101 in the extending direction of the bar-shaped hole 207. Here, too much description is omitted. The unlocking mechanism further comprises: a fixed rod 208 arranged on the fixed shaft 203, a plug hole arranged in the bar-shaped hole 207 and a second spring 209. The axial direction of the fixing lever 208 is parallel to the extending direction of the bar-shaped hole 207. The extending direction of the plug hole is parallel to the extending direction of the strip-shaped hole 207, and the plug hole is matched with the fixing rod 208. The adaptation here means that the plug-in hole and the fixing rod 208 can form a sliding connection in the extending direction of the strip-shaped hole 207. The second spring 209 is sleeved on the fixing rod 208. Meanwhile, the second spring 209 stores potential energy that causes the fixing lever 208 to be pulled out of the insertion hole. The second spring 209 is used to provide a force to the stationary shaft 203 away from the mating hole.

It should be clear that the fixing rod 208 is inserted into the insertion hole. The fixing lever 208 also has a function of restricting relative movement of the fixing shaft 203 and the case 101 along the axis of the fixing shaft 203 and relative rotation about the axis of the fixing shaft 203. When the gear 201 and the arc-shaped rack 200 are required to be disengaged, the fixing shaft 203 is lifted in the extending direction of the bar-shaped hole 207 at this time. At this time, the lifting force overcomes the elastic force of the second spring 209 to raise the fixing shaft 203 until the gear 201 and the arc-shaped rack 200 are in meshed contact. When the gear 201 and the arc-shaped rack 200 are in meshed contact, the movable side plate 106 can freely rotate again. Further, the lifting force on the stationary shaft 203 is withdrawn, and at this time, the stationary shaft 203 is reset by the elastic force of the second spring 209, which can be brought into engagement with the arc-shaped rack 200 at a time.

It should be clear that for convenience of operation, as shown in fig. 3, a plurality of fixed shafts 203 on the same side of the case 101 may be connected together in the form of a lifting lever 210. When the engaged state of the gear 201 and the arc-shaped rack 200 needs to be released, only the lifting lever 210 needs to be lifted. Of course, other non-rod-like structures may be used instead of the lifting rod 210.

It should be clear that in the present invention, the pressing structure may be any kind of structure. As shown in fig. 2, 4 and 7, in a specific embodiment of the present invention, the pressing structure includes: the lifting frame 303, a plurality of piston columns 302 are disposed on the lifting frame 303, and an axial direction of the piston columns 302 is parallel to the first direction. The piston rod comprises a connecting hole 300 which is formed on the top cover 103 and corresponds to the piston rods 302 one by one, a piston sucker 301 which corresponds to the connecting holes 300 one by one and a lifting assembly. The piston suction cup 301 is disposed on the top cover 103, and the piston post 302 can generate a piston motion with the piston suction cup 301 through the connection hole 300. It should be clear that the lifting assembly serves to move the lifting frame 303 away from the tendency of the top cover 103 in a first direction. By the principle of the piston structure, when the piston rod 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 is reduced, and the piston rod 302 can generate a pressing force. When the piston column 302 is far away from the bottom end of the piston suction cup 301 through the connection hole 300, negative pressure is generated inside the piston suction cup 301, so that suction force is provided, and objects can be sucked.

As shown in fig. 1 and 2, in an embodiment of the present invention, a lifting assembly includes: a plurality of guide posts penetrating the lifting frame 303, wherein the axes of the guide posts extend along a first direction, and the first ends of the guide posts are connected with the top cover 103. The fixing blocks 304 and the third springs 305 are in one-to-one correspondence with the guide posts, the fixing blocks 304 are arranged at the second ends of the guide posts, the third springs 305 are sleeved on the guide posts, the first ends of the third springs 305 are connected with the fixing blocks 304, and the second ends of the third springs 305 are connected with the lifting frame 303. When it is desired to press the object by the plunger shaft 302, only the lifting frame 303 is required to be pressed, and the lifting frame 303 causes the plunger shaft 302 to move downward in the first direction, thereby realizing the pressing of the object. When the suction of the object is required, the pressing force applied to the lifting frame 303 is canceled. The further lifting frame 303 is reset under the action of the elastic force of the third spring 305, and at this time, the piston column 302 makes the interior of the piston suction cup 301 generate negative pressure. While the piston suction cup 301 is capable of sucking up an object.

Further, it is understood that the positioning structure of the present invention is to be able to position the top cover 103 and the case 101. The battery module located inside the case 101 is prevented from being offset from the bus bars located on the top cover 103 when in use. The positioning structure may thus be any structure, as shown in fig. 1, 2 and 4, including: the plurality of positioning rods 102 extend along a first direction (in this embodiment, the first direction is a vertical direction) parallel to the thickness direction of the top cover 103. Positioning grooves 104 which are arranged on the top cover 103 and correspond to the positioning rods 102 one by one. When in use, the positioning groove 104 on the top cover 103 is abutted with the positioning rod 102, so that the positioning can be realized.

Meanwhile, in order to further improve the practicability of the tool. A fixing structure is further provided between the case 101 and the top cover 103, and the fixing structure is used for limiting relative displacement between the case 101 and the top cover 103 along the first direction. Preferably, the fixing structure includes: a plurality of first hooks provided on the top cover 103. And the second hooks are arranged on the box body 101 and are used for being hung with the first hooks. It is known that the first hook and the second hook may be butt-joint hooks commonly used in the market. For example: carriage hooks, etc., and are not described in detail herein.

Specifically, as shown in fig. 1, fig. 2, and fig. 8, in an embodiment of the present invention, the first hook includes: the first hooking block 400 and the limiting groove 404 formed on the first hooking block 400 extend along the first direction. The second couple includes: a hinge block 401, a second hanging block 402 and a fourth spring 405, the hinge block 401 being provided on the case 101. The second hooking block 402 extends in the first direction, and the second hooking block 402 is hinged with the hinge block 401. The limiting block 403 is arranged on the second hanging block 402, and the limiting block 403 is matched with the limiting groove 404. The first end of the fourth spring 405 is connected to the second hooking block 402, the second end of the fourth spring 405 is connected to the box 101, and the fourth spring 405 stores potential energy that causes the stopper 403 to approach the stopper groove 404. Therefore, the fourth spring 405 can enable the limiting block 403 to be clamped in the limiting groove 404, so that the fixation between the box body 101 and the top cover 103 is realized.

Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. Frock is used in welding of electricity core utmost point post and busbar, its characterized in that includes:

the box body (101) is of a hollow structure, the top surface of the box body is provided with an opening, and at least one battery cell is placed in the box body;

the top cover (103) is arranged on the opening of the box body (101), and at least one welding opening (105) is correspondingly arranged at the pole of the at least one battery cell;

at least one group of pressing structures are arranged on one side of the top cover (103) close to the battery cell; wherein,,

the pressing structure has a first state and a second state,

when the pressing structure is in a first state, the pressing structure adsorbs connecting pieces which are in one-to-one correspondence with the battery core polar posts of the plurality of battery cores, and the plurality of connecting pieces are used for forming a bus bar;

when the pressing structure is in the second state, the pressing structure is used for enabling the corresponding battery core pole and the connecting sheet to be in close contact.

2. The tool for welding the battery terminal and the bus bar according to claim 1, wherein the box body (101) has a limiting structure for limiting the battery module to a set position in the box body (101), the box body (101) has four side walls, and of the four side walls, a first side wall and a second side wall are oppositely arranged, at least one of the first side wall and the second side wall is a movable side plate (106), the movable side plate (106) forms the limiting structure, each movable side plate (106) is hinged with the box body (101) through a hinge shaft, the axis line of the hinge shaft extends along a first direction, and the first direction is parallel to a side edge of the bottom of the box body (101) connected with the movable side plate (106);

each movable side plate (106) has two working states of opening and closing, when the movable side plate (106) is in the closing state, the movable side plate (106) is used for limiting the set position of the battery module in the box body (101), and when the movable side plate (106) is in the opening state, the movable side plate (106) is used for taking and placing the battery module in the box body (101);

the locking component is arranged between the movable side plate (106) and the box body (101), and is used for limiting the relative rotation between the movable side plate (106) and the box body (101) around the hinge shaft when the movable side plate (106) is in a closed state.

3. The tooling for welding a cell post to a busbar of claim 2, wherein the locking assembly comprises:

one/two parallel arc racks (200), wherein the axis line of each arc rack (200) is overlapped with the axis line of the hinging shaft, and one/two parallel arc racks (200) are respectively arranged on one side/two sides of the movable side plate (106) along the second direction;

the gears (201) are in one-to-one correspondence with the arc racks (200), the gears (201) are in rotary connection with the box body (101) through the fixed shafts (203), the axial lines of the fixed shafts (203) extend along the first direction, and the gears (201) can be meshed with the arc racks (200);

and the anti-reverse mechanism is arranged between the fixed shaft (203) and the gear (201) and used for limiting the gear (201) to rotate in one direction only.

4. The tooling for welding the battery terminal and the bus bar according to claim 3, wherein the anti-reverse mechanism comprises:

a ratchet wheel (204) provided on the fixed shaft (203);

the ratchet wheel (204) is positioned in the round cavity (202), and the axis of the round cavity (202) is coincident with the axis of the ratchet wheel (204);

the ratchet wheel comprises a plurality of first springs (206) arranged along the side walls of the circular cavity (202), wherein pawls (205) are further arranged on the first springs (206), the first springs (206) are used for providing force which is inconsistent with the outer surface of the ratchet wheel (204) for the pawls (205), and the pawls (205) are used for being clamped with the ratchet wheel (204) when the gear (201) rotates reversely.

5. The tooling for welding the battery terminal and the bus bar according to claim 4, wherein the locking assembly further comprises an unlocking mechanism for releasing the engagement state of the gear (201) and the arc-shaped rack (200);

preferably, the unlocking mechanism includes:

the strip-shaped holes (207) are formed in the box body (101) and correspond to the fixing shafts (203) one by one, the extending direction of the strip-shaped holes (207) is perpendicular to the axial direction of the fixing shafts (203), and the strip-shaped holes (207) are matched with the fixing shafts (203);

a fixing rod (208) arranged 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);

the inserting holes are formed in the strip-shaped holes (207), the extending direction of the inserting holes is parallel to the extending direction of the strip-shaped holes (207), and the inserting holes are matched with the fixing rods (208);

the second spring (209), second spring (209) cover is located dead lever (208), second spring (209) are used for providing for fixed axle (203) keep away from spliced eye's power.

6. The tooling for welding a cell post and a busbar according to any one of claims 1 to 5, wherein the positioning structure comprises:

a plurality of positioning rods (102), wherein the positioning rods (102) extend along a first direction, and the first direction is parallel to the thickness direction of the top cover (103);

and the positioning grooves (104) are arranged on the top cover (103) and correspond to the positioning rods (102) one by one.

7. The tooling for welding the battery cell pole and the bus bar according to any one of claims 1 to 5, wherein a fixing structure is further arranged between the box body (101) and the top cover (103), and the fixing structure is used for limiting the relative displacement between the box body (101) and the top cover (103) along the first direction;

preferably, the fixing structure includes:

a plurality of first hooks arranged on the top cover (103);

the second hooks are arranged on the box body (101) and are in one-to-one correspondence with the first hooks, and the second hooks are used for being connected with the first hooks in a hanging mode.

8. The tooling for welding a battery post to a busbar of claim 7, wherein the first hook comprises:

a first hooking block (400), the first hooking block (400) extending along a first direction;

a limit groove (404) arranged on the first hanging block (400);

the second hook comprises:

a hinge block (401), wherein the hinge block (401) is arranged on the box body (101);

a second hooking block (402), wherein the second hooking block (402) extends along the first direction, and the second hooking block (402) is hinged with the hinge block (401);

the limiting block (403) is arranged on the second hanging block (402), and the limiting block (403) is matched with the limiting groove (404);

the first end of the fourth spring (405) is connected with the second hooking block (402), the second end of the fourth spring (405) is connected with the box body (101), and potential energy enabling the limiting block (403) to be close to the limiting groove (404) is stored in the fourth spring (405).

9. The tool for welding a cell terminal and a bus bar according to any one of claims 1 to 5, wherein the pressing structure includes:

-a lifting frame (303), on which lifting frame (303) a plurality of piston posts (302) are provided, the axial direction of the piston posts (302) being parallel to the first direction;

connecting holes (300) which are arranged on the top cover (103) and correspond to the piston columns (302) one by one;

the piston sucking discs (301) are in one-to-one correspondence with the connecting holes (300), the piston sucking discs (301) are arranged on the top cover (103), and the piston columns (302) can generate piston movement with the piston sucking discs (301) through the connecting holes (300);

a lifting assembly for tending to move the lifting frame (303) away from the top cover (103) in a first direction.

10. The tooling for welding a cell post to a busbar of claim 9, wherein the lifting assembly comprises:

a plurality of guide posts penetrating through the lifting frame (303), wherein the axial lines of the guide posts extend along a first direction, and the first ends of the guide posts are connected with the top cover (103);

the fixing blocks (304) and the third springs (305) are in one-to-one correspondence with the guide posts, the fixing blocks (304) are arranged at the second ends of the guide posts, the third springs (305) are sleeved on the guide posts, the first ends of the third springs (305) are connected with the fixing blocks (304), and the second ends of the third springs (305) are connected with the lifting frame (303).