Battery cell welding limiting tool

Abstract

The utility model discloses a battery cell welding limiting tool which is used for limiting the positions of a battery cell and a top cover plate so as to facilitate welding and comprises an upper cover plate, a connecting piece and a lower cover plate, the upper cover plate and the lower cover plate are connected through the connecting piece, the connecting piece is used for placing and positioning the top cover plate, and the lower cover plate is used for placing and positioning the battery cell. And the upper cover plate and the lower cover plate are covered to fix the top cover plate and the battery cell. According to the tool, the relative positions of the top cover plate and the battery cell are limited, the welded battery cell can be arranged in the aluminum shell, the top cover plate can be in butt joint with the aluminum shell, the machining difficulty is reduced, and the welding accuracy is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery welding, in particular to a battery core welding limiting tool. Background Art

[0002] With the rapid development of the new energy market, the demand for power batteries is increasing. Currently, common power batteries can be divided into three categories according to their structure: cylindrical, square aluminum shell and soft pack. Among them, square aluminum shell batteries have the highest market share. The main reason is that square aluminum shell batteries are high-energy-density batteries with lower costs than soft pack batteries, better safety than cylindrical batteries, higher module assembly rate and simpler assembly method.

[0003] There are also solutions for installing soft-pack batteries into square aluminum shells. Compared with simple square aluminum shell batteries, the advantages of these solutions are that after the soft-pack batteries are installed in the aluminum shell, additional fire extinguishing materials can be loaded into the aluminum shell, which increases safety under certain conditions. However, before the soft-pack batteries are installed in the aluminum shell, the soft-pack batteries need to be welded to the top cover plate first, and then installed in the aluminum shell as a whole. This operation requires ensuring that after the battery cell and the top cover plate are welded, the battery cell can be placed in the shell and the top cover plate can be aligned with the aluminum shell, so as to ensure the subsequent welding and sealing of the top cover plate and the aluminum shell, which increases the difficulty of processing. Utility Model Content

[0004] In order to overcome the shortcomings and deficiencies in the prior art, the purpose of the utility model is to provide a battery cell welding limit tool, which limits the relative positions of the top cover plate and the battery cell, ensuring that the battery cell after welding can be loaded into the aluminum shell and the top cover plate can be docked with the aluminum shell, thereby reducing the processing difficulty and improving the welding accuracy.

[0005] The purpose of the utility model is achieved through the following technical solutions:

[0006] A battery cell welding limiting tool is used to limit the position of the battery cell and the top cover plate to facilitate welding, comprising an upper cover plate, a connector and a lower cover plate. The upper cover plate and the lower cover plate are connected by the connector. The connector is used to place and position the top cover plate. The lower cover plate is used to place and position the battery cell. The upper cover plate and the lower cover plate are covered together to fix the top cover plate and the battery cell.

[0007] In one embodiment, the upper cover plate and the connecting member are movably connected via a movable member.

[0008] In one embodiment, the lower cover plate and the connecting member are detachably connected.

[0009] In one embodiment, the lower cover plate and the connecting member are connected by a latch structure, and the latch structure includes latches and limiting holes that are adapted to each other; the latches are plugged into the corresponding limiting holes;

[0010] The latch is arranged on the connecting piece, and the limiting hole is correspondingly arranged on the lower cover plate, or the limiting hole is arranged on the connecting piece, and the latch is correspondingly arranged on the lower cover plate.

[0011] In one embodiment, a slot is provided on the connecting member, and the top cover plate is arranged in the slot.

[0012] In one embodiment, a plurality of first placement grooves are spaced apart on the inner wall of the groove, and the top cover plate includes a plurality of output ends, and the plurality of output ends are respectively and correspondingly placed in the plurality of first placement grooves.

[0013] In one embodiment, the top cover plate is provided with an adapter plate, and the adapter plate faces the lower cover plate.

[0014] In one embodiment, at least one second placement groove is formed on the lower cover plate, and the second placement groove is used for placing the battery cell.

[0015] In one embodiment, a take-out slot for taking out the battery cell is provided on the bottom surface of the second placement slot.

[0016] In one embodiment, a plurality of connection grooves are provided at a portion of the lower cover plate close to the connector, a transfer plate is provided on the top cover plate, and a tab is provided on the battery cell, and the transfer plate and the corresponding tab are placed in the corresponding connection groove.

[0017] In one embodiment, a plurality of windows for welding are provided on the upper cover plate, and when the upper cover plate and the lower cover plate are covered, the positions of the windows and the connection grooves correspond one to one.

[0018] In one embodiment, a pressing block is provided on the periphery of the window on one side of the upper cover plate close to the lower cover plate, and the pressing block is used to press the adapter plate and the tab in the connecting groove.

[0019] In one embodiment, the upper cover plate and the lower cover plate are connected via a locking structure at one end away from the connecting member.

[0020] The beneficial effects of the utility model are as follows: the upper cover plate moves toward the direction approaching the lower cover plate to cover the cover plate, and the top cover plate and the battery cell placed on the connecting piece and the lower cover plate are fixedly locked, so that the battery cell and the welded parts of the top cover plate are fixedly clamped, and the relative position between the battery cell and the top cover plate after welding is effectively limited, ensuring that the battery cell after welding can be loaded into the aluminum shell, and the top cover plate can be docked with the aluminum shell, thereby reducing the processing difficulty and improving the welding accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 It is a schematic structural view of the connecting piece of the limit tooling in the embodiment of the present utility model not connected to the lower cover plate;

[0023] Figure 2 It is Figure 1 a schematic structural view of the connection between the upper cover plate and the connecting piece in

[0024] Figure 3 It is Figure 1 a schematic structural view of the lower cover plate in

[0025] Figure 4 It is a schematic structural view of the limit tooling after installing the battery cell and the top cover plate;

[0026] Figure 5 It is Figure 4 an exploded view of

[0027] In the figure: 1. Upper cover plate; 11. Window; 12. Pressing block; 2. Connecting piece; 21. Groove; 22. First placement groove; 3. Lower cover plate; 31. Second placement groove; 32. Connection groove; 33. Part-taking groove; 4. Movable part; 5. Pin structure; 51. Pin; 52. Limit hole; 6. Locking structure; 61. Snap; 62. Block; 7. Positioning structure; 71. Positioning post; 72. Positioning hole; 8. Battery cell; 81. Tab; 9. Top cover plate; 91. Adapter plate; 92. Output terminal. Specific embodiments

[0028] Next, specific embodiments of the present utility model will be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the description of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0029] In the description of the present utility model, unless otherwise clearly defined and limited, terms such as "set", "installed", "connected", etc. shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific situations.

[0030] The orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the utility model product is customarily placed during use. It is only for the convenience of description and simplification of the description, 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 therefore cannot be construed as a limitation to the present utility model.

[0031] Terms such as "first", "second", "third", etc. are only used to distinguish elements with similar attributes, rather than indicating or implying relative importance or a specific order.

[0032] The term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion. In addition to the listed elements, it may also include other elements not specifically listed.

[0033] For a battery with a battery cell 8 installed in a square aluminum shell, the tab 81 of the battery cell 8 needs to be welded to the adapter piece 91 on the top cover plate 9 first, and then the battery cell 8 is placed into a metal shell (not shown), and it is necessary to ensure that the top cover plate 9 just fits the shell. There is a certain processing difficulty in how to successfully insert the battery cell 8 into the shell and at the same time ensure that the top cover plate 9 fits the shell perfectly for the subsequent welding tightness between the top cover plate 9 and the shell. As Figures 1 to 5 shown, the present utility model provides a welding limiting tooling for battery cells, which is used to limit the positions of the battery cell 8 and the top cover plate 9 for the convenience of welding. It includes an upper cover plate 1, a connecting piece 2 and a lower cover plate 3. The upper cover plate 1 and the lower cover plate 3 are connected by the connecting piece 2. The upper cover plate 1 can move in a direction close to or away from the lower cover plate 3. The connecting piece 2 is used to place and position the top cover plate 9, and the lower cover plate 3 is used to place and position the battery cell 8; when the top cover plate 9 is placed and positioned on one side of the connecting piece 2 close to the lower cover plate 3 and the battery cell 8 is placed and positioned on the lower cover plate 3, the upper cover plate 1 is closed on the lower cover plate 3 to fixedly clamp the top cover plate 9 and the battery cell 8.

[0034] In this embodiment, after the top cover plate 9 is positioned and placed on the connecting piece 2 and the battery cell 8 is positioned and placed on the lower cover plate 3, the upper cover plate 1 covers the lower cover plate 3, thereby fixedly locking the top cover plate 9 and the battery cell 8, so that the parts to be welded (the tab 81 and the adapter piece 91) of the battery cell 8 and the top cover plate 9 are fixedly clamped, which well ensures the relative position between the battery cell 8 and the top cover plate 9 after welding, avoids the problem of position deviation of the parts to be welded during the welding process and causes welding errors, improves the welding precision, ensures that the battery cell 8 can smoothly enter the shell, and at the same time ensures that the top cover plate 9 fits the metal shell perfectly, facilitates welding, saves the external press tooling, improves the welding efficiency and the battery quality.

[0035] As an implementation manner, as Figure 1and Figure 2 As shown in Figure 2 , the upper cover plate 1 is movably connected to the connecting member 2 through a movable member 4. Among them, the movable member 4 is a hinge. Two adjacent outer sides of the upper cover plate 1 and the lower cover plate 3 are connected by a hinge, so that the upper cover plate 1 can rotate away from the lower cover plate 3 around the hinge to open the lower cover plate 3, or rotate towards the lower cover plate 3 to close the lower cover plate 3. The structure is simple and the operation is flexible.

[0036] As an implementation manner, the lower cover plate 3 and the connecting member 2 are detachably connected. When the connecting member 2 or the lower cover plate 3 is deformed or damaged, the two can be disassembled, the intact parts can be retained, and the other part can be replaced, avoiding discarding the limiting tooling as a whole, reducing the use of materials for the limiting tooling and the custom processing time, well controlling the cost, and improving the production efficiency.

[0037] As an implementation manner, as Figures 1 to 3 shown, the lower cover plate 3 and the connecting member 2 are connected by a pin structure 5. The pin structure 5 includes a pin 51 and a limit hole 52 that are mutually adapted; the pin 51 and the corresponding limit hole 52 are inserted; the pin 51 is arranged on the connecting member 2, the limit hole 52 is correspondingly arranged on the lower cover plate 3, or the limit hole 52 is arranged on the connecting member 2, and the pin 51 is correspondingly arranged on the lower cover plate 3. Among them, two pin structures 5 can be arranged between the lower cover plate 3 and the connecting member 2, distributed on both sides, so that the connection between the lower cover plate 3 and the connecting member 2 is stable; or a plurality of pin structures 5 can be distributed at intervals between the lower cover plate 3 and the connecting member 2 to prevent the connection between the lower cover plate 3 and the connecting member 2 from being disconnected due to the fracture of one pin structure 5. Of course, one side of the lower cover plate 3 can be provided with a pin 51, and the other side can be provided with a limit hole 52. The corresponding side of the connecting member 2 is provided with a limit hole 52 corresponding to the pin 51, and the other side is provided with a pin 51 corresponding to the limit hole 52.

[0038] As an implementation manner, as Figure 1 、as Figure 4 and Figure 5 shown, a slot 21 is provided on the connecting member 2, and the top cover plate 9 is arranged in the slot 21. Among them, the slot 21 is arranged on the side surface of the connecting member 2 connected to the lower cover plate 3.

[0039] As an implementation manner, as Figure 1 、as Figure 4 and Figure 5 shown, the top cover plate 9 is provided with a transfer piece 91, and the transfer piece 91 faces the lower cover plate 3, which is convenient for the transfer piece 91 of the top cover plate 9 to be positionally docked with the ear 81 of the battery cell 8 inside the lower cover plate 3.

[0040] As an implementation manner, as Figure 1 、as Figure 4 and Figure 5As shown, a plurality of first placement grooves 22 are spaced apart on the inner wall of the slot 21, and the top cover plate 9 includes a plurality of output terminals 92, and the plurality of output terminals 92 are respectively placed in the plurality of first placement grooves 22.

[0041] As an implementation, as Figure 1 and as Figures 3 to 5 shown, at least one second placement groove 31 is provided on the lower cover plate 3, and the second placement groove 31 is used to place the battery cell 8.

[0042] Specifically, both the lower cover plate 3 and the upper cover plate 1 are rectangular structures. Along the length direction L of the lower cover plate 3, two second placement grooves 31 can be sequentially arranged. Two stacked battery cells 8 are placed in one second placement groove 31. Four connecting pieces 91 are provided on the top cover plate 9. One connecting piece 91 is connected to the corresponding two tab ears 81, so that the four groups of tab ears 81 of the four battery cells 8 are in one-to-one correspondence with the four connecting pieces 91 on the top cover plate 9. The two tab ears 81 of one group are correspondingly welded to one connecting piece 91. Of course, three or four or more second placement grooves 31 can be sequentially arranged along the length direction L of the lower cover plate 3, which is not limited herein.

[0043] Among them, when four second placement grooves 31 are provided, two top cover plates 9 can be inserted side by side on the connecting piece 2. Four connecting pieces 91 are provided on one top cover plate 9. Two battery cells 8 are stacked in one second placement groove 31. A connecting piece 91 is sandwiched between two adjacent tab ears 81 of the two battery cells 8, that is, one top cover plate 9 is welded to the four battery cells 8, and one connecting piece 91 is correspondingly welded to the two tab ears 81 of the two battery cells 8. After the welding is completed, the battery cells 8 can be lifted upward through the pick-up slot 33 to facilitate the removal of the battery cells 8 from the second placement groove 31.

[0044] As an implementation, as Figure 1 and Figures 3 to 5 shown, a pick-up slot 33 for taking out the battery cell 8 is provided on the bottom surface of the second placement groove 31; after the welding is completed, the battery cell 8 is lifted upward through the pick-up slot 33 to facilitate the removal of the battery cell 8 from the second placement groove 31.

[0045] As an implementation, as Figure 1 and Figures 3 to 5As shown in the figure, a plurality of connection grooves 32 are also formed in the lower cover plate 3 near the connecting member 2. The top cover plate 9 is provided with a transfer piece 91, and the battery cell 8 is provided with a tab 81. The transfer piece 91 and the corresponding tab 81 are both placed in the corresponding connection groove 32. Among them, the connection groove 32 can penetrate through the lower cover plate 3. In this embodiment, after welding one side of the parts to be welded (the transfer piece 91 and the tab 81) through the window 11, the tooling together with the product (the battery cell 8 and the top cover plate 9) is flipped, and then the other side of the parts to be welded is welded through the connection groove 32. After clamping the battery cell 8 and the top cover plate 9 once, first weld the tab 81 and the transfer piece 91 on one side through the window 11, flip the tooling, and then weld the tab 81 and the transfer piece 91 on the other side through the connection groove 32, saving the number of times of taking the product in and out, and greatly improving the work efficiency.

[0046] As an implementation manner, as Figures 1 to 5 shown, a plurality of windows 11 for welding are formed on the upper cover plate 1. When the upper cover plate 1 and the lower cover plate 3 are closed, the positions of the windows 11 correspond to those of the connection grooves 32 one by one.

[0047] As an implementation manner, as Figures 1 to 5 shown, on the side of the upper cover plate 1 close to the lower cover plate 3, a pressing block 12 is provided on the periphery of the window 11. The pressing block 12 is used to press the transfer piece 91 and the tab 81 in the connection groove 32. Specifically, after the upper cover plate 1 and the lower cover plate 3 are closed, the window 11 corresponds to the position of the connection groove 32, and the pressing block 12 presses the transfer piece 91 and the tab 81. The welding equipment passes through the window 11 to weld the pressed transfer piece 91 and tab 81, which is convenient for welding and has good accuracy.

[0048] As an implementation manner, as Figures 1 to 5 shown, one end of the upper cover plate 1 and the lower cover plate 3 away from the connecting member 2 is connected by a locking structure 6. Specifically, the locking structure 6 includes a buckle 61 and a clamping block 62. The buckle 61 is arranged on one side of the lower cover plate 3, and the clamping block 62 is correspondingly arranged on one side of the upper cover plate 1. When the lower cover plate 3 is closed on the lower cover plate 3, the clamping block 62 is inserted into the buckle 61 for clamping to lock the upper cover plate 1 and the lower cover plate 3; of course, the buckle 61 can also be arranged on the outer side surface of the upper cover plate 1, and the clamping block 62 is arranged on the outer side surface of the lower cover plate 3. The upper cover plate 1 and the lower cover plate 3 are detachably connected, which is convenient to open and close.

[0049] As an implementation manner, as Figure 1As shown in the figure, a positioning structure 7 is further provided between the upper cover plate 1 and the lower cover plate 3. The positioning structure 7 is arranged on the two surfaces of the upper cover plate 1 and the lower cover plate 3 for clamping the product. The positioning structure 7 includes a positioning post 71 arranged on the upper cover plate 1 and a positioning hole 72 on the lower cover plate 3. The positioning post 71 and the positioning hole 72 cooperate with each other so that when the upper cover plate 1 is closed on the lower cover plate 3, the upper cover plate 1 will not move in the horizontal direction, thereby improving the welding precision. Among them, the end of the positioning post 71 is set as a tapered structure so that the positioning post 71 can be accurately inserted into the positioning hole 72.

[0050] Through this limiting tooling of the present utility model, the relative position between the battery cell 8 and the top cover plate 9 after welding is well ensured, the position deviation of the part to be welded during the welding process is avoided, and the problem of welding error is solved, and the welding precision is improved. It not only ensures that the battery cell 8 can smoothly enter the shell, but also ensures the perfect fit between the top cover plate 9 and the shell, so as to ensure the welding tightness between the top cover plate 9 and the shell in the subsequent process.

[0051] The above are only the preferred embodiments of the present utility model, and do not impose any form of limitation on the present utility model. Although the present utility model has been disclosed above with the preferred embodiments, it is not intended to limit the present utility model. Any person skilled in the art can make some changes or modifications using the above-disclosed technical content within the scope of the technical solution of the present utility model, which are equivalent embodiments of equivalent changes. However, as long as it does not depart from the content of the technical solution of the present utility model, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present utility model still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A cell welding limiting tooling is used to limit the positions of a cell (8) and a top cover plate (9) for facilitating welding, and is characterized in that, It includes an upper cover plate (1), a connecting member (2) and a lower cover plate (3). The upper cover plate (1) and the lower cover plate (3) are connected by the connecting member (2). The connecting member (2) is used to place and position the top cover plate (9). The lower cover plate (3) is used to place and position the battery cell (8). The upper cover plate (1) and the lower cover plate (3) are closed to fix the top cover plate (9) and the battery cell (8).

2. The cell welding limit tooling according to claim 1, characterized in that, The upper cover plate (1) and the connecting member (2) are movably connected by a movable member (4).

3. The cell welding limit tooling according to claim 1, characterized in that, The lower cover plate (3) and the connecting member (2) are detachably connected.

4. The cell welding limit tooling according to claim 3, wherein The lower cover plate (3) and the connecting member (2) are connected by a pin structure (5). The pin structure (5) includes a pin (51) and a limiting hole (52) that are adapted to each other. The pin (51) is inserted into the corresponding limiting hole (52). The pin (51) is arranged on the connecting member (2), and the limiting hole (52) is correspondingly arranged on the lower cover plate (3), or the limiting hole (52) is arranged on the connecting member (2), and the pin (51) is correspondingly arranged on the lower cover plate (3).

5. The cell welding limiting tooling according to claim 1, characterized in that A slot (21) is provided on the connecting member (2), and the top cover plate (9) is arranged in the slot (21).

6. The cell welding limit tooling according to claim 5, wherein A plurality of first placement grooves (22) are spaced apart on the inner wall of the slot (21). The top cover plate (9) includes a plurality of output terminals (92), and the plurality of output terminals (92) are respectively placed in the plurality of first placement grooves (22).

7. The cell welding limit tooling according to claim 1, characterized in that, The top cover plate (9) is provided with a connecting piece (91), and the connecting piece (91) faces the lower cover plate (3).

8. The cell welding limit tooling according to claim 1, wherein At least one second placement groove (31) is formed on the lower cover plate (3), and the second placement groove (31) is used to place the battery cell (8).

9. The cell welding limit tooling according to claim 8, wherein A pick-up groove (33) for taking out the battery cell (8) is formed on the bottom surface of the second placement groove (31).

10. The cell welding limit tooling according to claim 1, characterized in that, A plurality of connection grooves (32) are also formed at a portion of the lower cover plate (3) close to the connecting member (2). The top cover plate (9) is provided with a connecting piece (91), and the battery cell (8) is provided with a tab (81). The connecting piece (91) and the corresponding tab (81) are both placed in the corresponding connection grooves (32).

11. The cell welding limit tooling according to claim 10, wherein, A plurality of welding windows (11) are formed on the upper cover plate (1). When the upper cover plate (1) and the lower cover plate (3) are closed, the positions of the windows (11) correspond to those of the connection grooves (32) one by one.

12. The cell welding limit tooling according to claim 11, wherein, A pressing block (12) is provided on the periphery of the window (11) on one side of the upper cover plate (1) close to the lower cover plate (3). The pressing block (12) is used to press the connecting piece (91) and the tab (81) in the connection groove (32).

13. The core welding limit tooling according to claim 1, characterized in that, One end of the upper cover plate (1) and the lower cover plate (3) away from the connecting member (2) is connected by a locking structure (6).

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