Welding jig

Abstract

The embodiment of the utility model provides a welding jig. The welding jig comprises a frame, a welding plate and a turnover piece. The welding plate is detachably connected to the frame, the welding plate and the frame define a mounting cavity, and a welding hole is formed in the welding plate; the turnover part is used for fixing a plurality of battery cells, the to-be-welded positions of the battery cells are opposite to the welding holes, the battery cells are welded to form a battery pack, and the turnover part is detachably connected into the mounting cavity so that the turnover part can be transferred along with the battery pack. Therefore, after the welding is completed, the plurality of battery cells are welded to form the battery pack, and the turnover piece and the battery pack can be disassembled together and transferred to the next working procedure, so that the problem that the battery pack falls apart in the transferring process can be effectively avoided.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of batteries, and particularly relates to a welding jig. BACKGROUND

[0002] Lithium ion batteries are widely used in portable electronic devices, electric vehicles, electric tools, energy storage devices and other fields due to their advantages of high energy density and good cycle performance. A single lithium ion battery, also known as a battery cell, has small capacity, voltage and current, and usually needs to be connected in series and parallel by using an electric connecting sheet (such as a nickel sheet) to form a battery pack for meeting specific customer requirements.

[0003] In the prior art, a welding jig is usually used to assist welding, and specifically, a plurality of battery cells are arranged in order in the welding jig, and a nickel sheet is welded to the welding positions (such as electrode terminals) of two adjacent battery cells, so as to form a battery pack. However, the battery pack after welding needs to be separated from the welding jig and transferred to the next process, and the battery pack is prone to disassembly during the transfer process. CONTENT OF THE UTILITY MODEL

[0004] The application aims to provide a welding jig to solve the problem that the existing battery pack is prone to disassembly after welding.

[0005] In order to solve the above technical problems, the application is implemented as follows:

[0006] In a first aspect, the application discloses a welding jig, which comprises a frame, a welding plate and a turnover piece.

[0007] The welding plate is detachably connected to the frame and forms an installation cavity together with the frame, and the welding plate is provided with a welding hole.

[0008] The turnover piece is used for fixing a plurality of battery cells, the welding positions of the battery cells are opposite to the welding hole, a plurality of the battery cells are welded to form a battery pack, and the turnover piece is detachably connected to the installation cavity, so that the turnover piece is transferred together with the battery pack.

[0009] Optionally, the turnover piece has a first direction and a second direction, the first direction intersects the second direction, and the turnover piece comprises a base and a cover plate which are arranged along the first direction and connected to each other.

[0010] The base is provided with a plurality of first profiling grooves arranged along the second direction.

[0011] The cover plate is provided with a second profiling groove at a position corresponding to the first profiling groove, the second profiling groove and the first profiling groove form a fixing groove, and the fixing groove is used for fixing the battery cells.

[0012] Optionally, the turnover piece further has a third direction intersecting with the first direction and the second direction respectively, and the two ends of the electric core along the third direction are provided with electrode terminals;

[0013] The first profiling groove and the second profiling groove are respectively provided with an avoiding area at the two ends along the third direction, and the avoiding area is used for avoiding the electrode terminals.

[0014] Optionally, the frame is provided with a first suction member on the side close to the welding plate;

[0015] The welding plate is provided with a second suction member at the corresponding position of the first suction member, and the second suction member is attracted to the first suction member.

[0016] Optionally, the frame is provided with one of a positioning block or a positioning groove on the side close to the welding plate;

[0017] The welding plate is provided with the other one of the positioning block or the positioning groove at the corresponding position of the frame, and the positioning block is embedded in the positioning groove.

[0018] Optionally, the frame is provided with a first positioning hole on the side close to the welding plate;

[0019] The welding plate is provided with a second positioning hole at the corresponding position of the first positioning hole;

[0020] The welding fixture further comprises a positioning member, and the positioning member is threaded through the first positioning hole and the second positioning hole.

[0021] Optionally, the frame has a first direction, and the frame comprises two first connecting plates and two second connecting plates;

[0022] The two first connecting plates extend along the first direction, and the two second connecting plates are arranged at intervals along the first direction and located between the two first connecting plates, and the first connecting plates, the second connecting plates and the welding plate enclose the mounting cavity;

[0023] At least one of the second connecting plates is provided with one of a guide groove or a guide block on the side close to the mounting cavity;

[0024] The turnover piece is provided with the other one of the guide groove or the guide block at the corresponding position of the second connecting plate, and the guide block is embedded in the guide groove.

[0025] Optionally, the frame further comprises at least one third connecting plate, and the third connecting plate is arranged in parallel with the second connecting plates and located between the two second connecting plates, so as to divide the mounting cavity into a plurality of sub-mounting cavities.

[0026] The turnover piece is provided with at least two, and one of the turnover pieces is detachably connected in one of the sub-mounting cavities.

[0027] Optionally, the welding plate further comprises a placing groove.

[0028] The placing groove is arranged on the side of the welding plate close to the mounting cavity and corresponds to the welding hole, and the placing groove is used for placing the electric connecting sheet.

[0029] The placing groove is provided with a magnetic piece, and the magnetic piece is used for adsorbing the electric connecting sheet.

[0030] Optionally, the welding plate further comprises a handle, and the handle is arranged on at least part of the edge of the welding plate and protrudes from the frame.

[0031] In the embodiment of the application, the turnover piece capable of fixing multiple electric cores is arranged, and the turnover piece is detachably connected in the mounting cavity formed by the frame and the welding plate. In this way, when the welding is completed, the multiple electric cores are welded to form a battery pack, the turnover piece and the battery pack can be detached and transferred to the next process together, so that the problem of disassembly of the battery pack during the transfer process can be effectively avoided.

[0032] Additional aspects and advantages of the present application will be described in the following description and part of them will become apparent from the description or will be learned from the practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0033] The above and / or additional aspects and advantages of the present application will become apparent from the description given below in conjunction with the accompanying drawings, wherein:

[0034] Figure 1 is a structural schematic diagram of a welding jig provided by the embodiment of the application;

[0035] Figure 2 is one of structural schematic diagrams of a turnover piece of a welding jig provided by the embodiment of the application;

[0036] Figure 3 is another of structural schematic diagrams of a turnover piece of a welding jig provided by the embodiment of the application;

[0037] Figure 4 is a third of structural schematic diagrams of a turnover piece of a welding jig provided by the embodiment of the application;

[0038] Figure 5 is a structural schematic diagram of a base of a turnover piece provided by the embodiment of the application;

[0039] Figure 6is a structural schematic view of a cover plate of a turnover piece provided by an embodiment of the present application;

[0040] Figure 7 is a structural schematic view of a frame of a welding jig provided by an embodiment of the present application;

[0041] Figure 8 is a structural schematic view of a frame of a welding jig provided by an embodiment of the present application;

[0042] Figure 9 is a structural schematic view of a welding plate of a welding jig provided by an embodiment of the present application;

[0043] Figure 10 is a structural schematic view of a welding plate of a welding jig provided by an embodiment of the present application.

[0044] Fig. 1 is a structural schematic view of a frame of a welding jig provided by an embodiment of the present application; Fig. 2 is a structural schematic view of a welding plate of a welding jig provided by an embodiment of the present application; Fig. 3 is a structural schematic view of a cover plate of a turnover piece provided by an embodiment of the present application; Fig. 4 is a structural schematic view of a frame of a welding jig provided by an embodiment of the present application; Fig. 5 is a structural schematic view of a welding plate of a welding jig provided by an embodiment of the present application; Fig. 6 is a structural schematic view of a cover plate of a turnover piece provided by an embodiment of the present application; 1. frame, 11. first connecting plate, 12. second connecting plate, 121. guide block, 122. fool-proof groove, 123. metal positioning block, 13. third connecting plate, 14. positioning block, 15. first mounting hole, 16. first positioning hole, 2. welding plate, 21. welding hole, 22. placing groove, 221. magnetic piece, 23. positioning groove, 24. second mounting hole, 25. second positioning hole, 26. handle, 3. mounting cavity, 31. sub-mounting cavity, 4. turnover piece, 41. base, 411. first body, 412. first profiling groove, 413. avoiding area, 414. third mounting hole, 415. third positioning hole, 416. guide groove, 42. cover plate, 421. second body, 422. second profiling groove, 423. fourth mounting hole, 424. fourth positioning hole, 43. fixing groove, 5. battery cell, X. first direction, Y. second direction, Z. third direction. DETAILED DESCRIPTION

[0045] The embodiments of the present application will be described in detail below, examples of which are shown in the drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only, and are only used to explain the present application, and cannot be understood as a limitation of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0046] The terms "first", "second" in the description and claims of the present application can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified and limited, the meaning of "a plurality of" is two or more. In addition, "and / or" in the description and claims indicates at least one of the connected objects, and the character " / ", generally indicates that the front and rear associated objects are in a "or" relationship.

[0047] In the description of the present application, it should be understood that the orientations or positional relationships indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0048] In the present application, the term "parallel" not only includes the case of absolute parallel, but also includes the case of approximate parallel which is generally recognized in engineering, such as "parallel" refers to the angle formed by a straight line and a straight line, a straight line and a surface, or a surface and a surface is-1°~1° state; At the same time, "perpendicular" also includes not only the case of absolute perpendicular, but also the case of approximate perpendicular which is generally recognized in engineering, such as "perpendicular" refers to the angle formed by a straight line and a straight line, a straight line and a surface, or a surface and a surface is 89°~91° state. Equal distance or equal angle not only includes the case of absolute equality, but also includes the case of approximate equality which is generally recognized in engineering, that is, there can be a certain error, such as the state of tolerance range-1%~1%.

[0049] In the description of the present application, it should be noted that, unless otherwise specified and limited, the terms "mounting", "connecting", "connection" should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0050] The present application provides a kind of welding fixture, the welding fixture of the present application is described in detail below with reference to the drawings.

[0051] Referring to Figure 1 , a structure schematic diagram of a welding fixture provided by the embodiment of the present application is shown, referring to Figures 2 to 4, a structure schematic diagram of a turnover piece of a welding jig is shown, referring to Figure 5 , a structure schematic diagram of a base of the turnover piece is shown, referring to Figure 6 , a structure schematic diagram of a cover plate of the turnover piece is shown, referring to Figures 7 to 8 , a structure schematic diagram of a frame of the welding jig is shown, referring to Figures 9 to 10 , a structure schematic diagram of a welding plate of the welding jig is shown.

[0052] As shown in Figure 1 , the present application provides a welding jig, comprising: a frame 1, a welding plate 2 and a turnover piece 4; the welding plate 2 is detachably connected to the frame 1 and forms an installation cavity 3 with the frame 1, and the welding plate 2 is provided with a welding hole 21; the turnover piece 4 is used for fixing a plurality of battery cells 5, the welding position of the battery cell 5 is opposite to the welding hole 21, the plurality of battery cells 5 are welded to form a battery pack, and the turnover piece 4 is detachably connected in the installation cavity 3, so that the turnover piece 4 is transferred together with the battery pack.

[0053] In the embodiment of the present application, the welding hole 21 is arranged on the welding plate 2, and the welding hole 21 is opposite to the welding position of the battery cell 5. In this way, the welding equipment can directly weld the battery cell 5 through the welding hole 21, the deviation of welding can be avoided, and the connection reliability of the plurality of battery cells 5 can be improved. More importantly, the turnover piece 4 for fixing the plurality of battery cells 5 is arranged, and the turnover piece 4 is detachably connected in the installation cavity 3 formed by the frame 1 and the welding plate 2. In this way, when the welding is completed, the plurality of battery cells 5 are welded to form a battery pack, the turnover piece 4 and the battery pack can be detached and transferred to the next process together, so that the problem of the battery pack being scattered during the transfer process can be effectively avoided.

[0054] It should be noted that the welding position of the battery cell 5 in the embodiment of the present application refers to the electrode terminal of the battery cell 5. The welding jig of the embodiment of the present application can be applied to cylindrical battery cells 5, and can also be applied to square battery cells 5. In combination with the drawings of the present application, the cylindrical battery cell 5 is described below, and the square battery cell 5 can be arranged by referring to the cylindrical battery cell 5.

[0055] As shown in Figures 2 to 4 , in some optional embodiments of the present application, the turnover piece 4 has a first direction X and a second direction Y, the first direction X intersects the second direction Y, and the turnover piece 4 comprises: a base 41 and a cover plate 42 arranged along the first direction X and connected to each other; the base 41 is provided with a plurality of first profiling grooves 412 arranged along the second direction Y; the cover plate 42 is provided with a second profiling groove 422 at the corresponding position of the first profiling groove 412, the second profiling groove 422 and the first profiling groove 412 form a fixing groove 43, and the fixing groove 43 is used for fixing the battery cell 5.

[0056] In the embodiment of the present application, since the base 41 is provided with the first profiling groove 412, and the cover plate 42 is provided with the second profiling groove 422, when the base 41 and the cover plate 42 are connected together, the first profiling groove 412 and the second profiling groove 422 can be enclosed to form a fixing groove 43 matched with the shape of the battery cell 5. In this way, by installing the battery cell 5 in the fixing groove 43, on the one hand, the position of the battery cell 5 can be effectively prevented from being deviated during welding, the welding precision is improved, and the connection reliability between the battery cells 5 is improved. On the other hand, after the welding is completed, the base 41, the cover plate 42 and the battery pack between the base 41 and the cover plate 42, or only the base 41 and the battery pack can be transferred to the next process together. During the whole transfer process, the base 41 and the cover plate 42 can play a limiting and supporting role on the battery pack, so that the battery pack will not be scattered.

[0057] It should be noted that the first profiling groove 412 and the second profiling groove 422 of the embodiment of the present application refer to grooves matched with the shape of the battery cell 5. For the cylindrical battery cell 5, the first profiling groove 412 and the second profiling groove 422 are in the shape of a circular arc. In addition, in the embodiment of the present application, a plurality of first profiling grooves 412 are arranged on the base 41 along the second direction Y, a plurality of second profiling grooves 422 are arranged on the cover plate 42 along the second direction Y, one first profiling groove 412 and one second profiling groove 422 correspond to enclose to form a fixing groove 43 for fixing one battery cell 5. The number of the first profiling grooves 412 and the second profiling grooves 422 is not limited in the embodiment of the present application, and can be adjusted according to actual needs by those skilled in the art. In addition, the first direction X, the second direction Y and the third direction Z of the embodiment of the present application can be perpendicular to each other. Specifically, the first direction X is the height direction of the turnover piece 4, that is, the height direction of the frame 1; the second direction Y is the length direction of the turnover piece 4, that is, the length direction of the frame 1; and the third direction Z is the width direction of the turnover piece 4, that is, the width direction of the frame 1, wherein the first direction X, the second direction Y and the third direction Z are perpendicular to each other.

[0058] In a specific application, the base 41 comprises a first body 411, and the first body 411 is provided with third mounting holes 414 at both ends along the second direction Y on the side close to the cover plate 42. Correspondingly, the cover plate 42 comprises a second body 421, and the second body 421 is provided with fourth mounting holes 423 at the corresponding positions of the third mounting holes 414. Among them, two groups of magnets with magnetic attraction are respectively arranged in the third mounting holes 414 and the fourth mounting holes 423, and the detachable connection of the base 41 and the cover plate 42 can be realized through the attraction of the two groups of magnets. It should be noted that the third mounting holes 414 and the fourth mounting holes 423 can be through holes or blind holes. In one embodiment, the third mounting holes 414 and the fourth mounting holes 423 are both blind holes. In addition, the first body 411 is further provided with third positioning holes 415 at both ends along the second direction Y on the side close to the cover plate 42. Correspondingly, the second body 421 is provided with fourth positioning holes 424 at the corresponding positions of the third positioning holes 415. The turnover piece 4 further comprises a positioning piece such as a positioning pin, and the precise assembly of the base 41 and the cover plate 42 can be realized by inserting the positioning pin into the third positioning holes 415 and the fourth positioning holes 424.

[0059] In some optional embodiments of the present application, the turnover piece 4 further has a third direction Z intersecting the first direction X and the second direction Y respectively, and the electrode terminals are arranged at both ends of the battery cell 5 along the third direction Z. The first profiling groove 412 and the second profiling groove 422 are respectively provided with avoiding areas 413 at both ends along the third direction Z, and the avoiding areas 413 are used for avoiding the electrode terminals. In this way, by arranging the avoiding areas 413 at both ends of the first profiling groove 412 and the second profiling groove 422, the electrode terminals of the battery cell 5 can be avoided, so as to facilitate the welding of the electrode terminals and the electrically connecting pieces.

[0060] Specifically, as shown in Figure 5 , the base 41 comprises a first body 411, and the first profiling groove 412 is arranged on the side of the first body 411 close to the cover plate 42. The first profiling groove 412 comprises a bottom wall and two side walls arranged at intervals along the third direction Z, and the avoiding areas 413 are arranged at the two side walls. On the one hand, when the battery cell 5 is installed in the first profiling groove 412, the two side walls can limit the movement of the battery cell 5 along the third direction Z. On the other hand, since the side walls are provided with the avoiding areas 413, the electrode terminals can be avoided to prevent the base 41 from shielding the electrode terminals, which is beneficial to the subsequent welding work. As shown in Figure 6 , the cover plate 42 comprises a second body 421, and the second profiling groove 422 is arranged on the side of the second body 421 close to the base 41. The second profiling groove 422 is arranged through the second body 421 along the third direction Z to form avoiding areas 413 at both ends of the second profiling groove 422, so as to avoid the electrode terminals to prevent the cover plate 42 from shielding the electrode terminals, which is beneficial to the subsequent welding work.

[0061] It should be noted that the electrode terminals include positive electrode terminals and negative electrode terminals, and the positive electrode terminals and the negative electrode terminals are respectively located at two ends of the battery cell 5 along the third direction Z. In actual application, the electrically conductive tabs are welded with the positive electrode terminal of one of the two adjacent battery cells 5 and the negative electrode terminal of the other one of the two adjacent battery cells 5, so as to realize the series-parallel connection of the battery cells 5. Based on this, as shown in Figure 3 the outer surface of the first body 411 is alternately provided with "+" and "-" marks at the corresponding positions of the plurality of first profiling grooves 412. During the installation of the battery cell 5, the positive electrode terminal of the battery cell 5 corresponds to the "+" mark, and the negative electrode terminal of the battery cell 5 corresponds to the "-" mark, so that the problem of the battery cell 5 being installed in reverse can be effectively prevented.

[0062] As shown in Figures 7 to 8 in some optional embodiments of the present application, the frame 1 is provided with a first suction member near one side of the welding plate 2; the welding plate 2 is provided with a second suction member at the corresponding position of the first suction member, and the second suction member is attracted to the first suction member.

[0063] In the embodiments of the present application, since the corresponding positions of the frame 1 and the welding plate 2 are respectively provided with the first suction member and the second suction member, the reliable connection of the welding plate 2 and the frame 1 can be realized through the attraction of the first suction member and the second suction member.

[0064] It should be noted that one of the first suction member and the second suction member is a magnetic member 221, and the other one is a magnetic member 221 or a metal member. The reliable connection of the welding plate 2 and the frame 1 can be realized through the mutual attraction of the magnetic member 221 and the magnetic member 221, or the magnetic member 221 and the metal member. In addition, the present application does not limit the number of the first suction member and the second suction member, and the person skilled in the art can adjust according to the actual needs.

[0065] In one of the embodiments, the first suction member and the second suction member are both magnets. As shown in Figure 7 and Figure 9As shown, the frame 1 includes two first connecting plates 11 extending along the first direction X, and two second connecting plates 12 arranged at intervals along the first direction X and located between the two first connecting plates 11, wherein the first connecting plates 11 and the second connecting plates 12 are provided with two first mounting holes 15 on both sides along the third direction Z. Correspondingly, the welding plate 2 is provided with two welding plates 2 arranged on both sides of the frame 1 along the third direction Z, and each welding plate 2 is provided with two second mounting holes 24 on the side close to the frame 1, which correspond to the two first mounting holes 15 one by one. Two groups of magnets with magnetic attraction are arranged in the first mounting holes 15 and the second mounting holes 24 respectively, and the reliable connection between the welding plate 2 and the frame 1 can be achieved through the attraction of the two groups of magnets. It should be noted that the first mounting hole 15 and the second mounting hole 24 can be a through hole or a blind hole, and in one embodiment, the first mounting hole 15 is a blind hole and the second mounting hole 24 is a through hole.

[0066] In some optional embodiments of the present application, the frame 1 is provided with one of the positioning blocks 14 or the positioning grooves 23 on the side close to the welding plate 2; and the welding plate 2 is provided with the other one of the positioning blocks 14 or the positioning grooves 23 at the corresponding position of the frame 1, and the positioning block 14 is embedded in the positioning groove 23.

[0067] In the embodiments of the present application, due to the arrangement of the positioning block 14 and the positioning groove 23, during the assembly of the welding plate 2 and the frame 1, the coarse positioning of the welding plate 2 can be achieved through the cooperative connection of the positioning block 14 and the positioning groove 23, which is beneficial to improve the accuracy of subsequent welding.

[0068] It should be noted that the drawings of the present application only show the case that the positioning block 14 is arranged on the frame 1 and the positioning groove 23 is arranged on the welding plate 2, but in actual application, the skilled in the art can also arrange the positioning block 14 on the welding plate 2 and the positioning groove 23 on the frame 1, which is not limited herein. In addition, when the number and / or arrangement position of the positioning blocks 14 or the positioning grooves 23 of the two welding plates 2 are different, the foolproof effect can be achieved, which effectively prevents the problem of relative reverse assembly of the two welding plates 2, or the problems of upside-down or left-right reverse assembly of a single welding plate 2.

[0069] In actual application, for example, Figure 7 and Figure 9As shown, the frame 1 can be provided with letter marks on both sides along the third direction Z, for example, the frame 1 is provided with a letter mark "A" on one side, and correspondingly, the welding plate 2 connected to the side is also provided with a letter mark "A", the frame 1 is provided with a letter mark "B" on the other side, and correspondingly, the welding plate 2 connected to the side is also provided with a letter mark "B", so as to play a foolproof role and effectively prevent the problem of two welding plates 2 being installed reversely.

[0070] In one of the embodiments, as shown in Figure 7 and Figure 9 As shown, the welding plate 2 includes a first welding plate and a second welding plate, the first welding plate is the welding plate 2 provided with a letter mark "A", and the second welding plate is the welding plate 2 provided with a letter mark "B". The first welding plate includes a first side and a second side which are arranged away from each other along the first direction X, the first side is provided with two positioning grooves 23 which are spaced apart along the second direction Y, and the second side is provided with one positioning groove 23 at a corresponding position of one of the two positioning grooves 23 of the first side. Correspondingly, the side of the frame 1 close to the first welding plate, i.e. the side of the second connecting plate 12 close to the first welding plate is provided with a positioning block 14 at a corresponding position of the positioning groove 23. The second welding plate includes a third side and a fourth side which are arranged away from each other along the first direction X, the third side and the fourth side are respectively provided with one positioning groove 23, and the two positioning grooves 23 are spaced apart along the second direction Y. Correspondingly, the side of the frame 1 close to the second welding plate, i.e. the side of the second connecting plate 12 close to the second welding plate is provided with a positioning block 14 at a corresponding position of the positioning groove 23.

[0071] In some optional embodiments of the present application, the side of the frame 1 close to the welding plate 2 is provided with a first positioning hole 16; the welding plate 2 is provided with a second positioning hole 25 at a corresponding position of the first positioning hole 16; and the welding jig further includes a positioning member which is arranged through the first positioning hole 16 and the second positioning hole 25.

[0072] In the embodiments of the present application, since the frame 1 and the welding plate 2 are respectively provided with the first positioning hole 16 and the second positioning hole 25, the precise positioning of the welding plate 2 can be realized by arranging the positioning member through the first positioning hole 16 and the second positioning hole 25, which is beneficial to improve the precision of subsequent welding.

[0073] In one of the embodiments, the frame 1 is close to one side of the welding plate 2, that is, two first positioning holes 16 are respectively arranged on two first connecting plates 11 close to one side of the welding plate 2, and the two positioning holes are spaced apart in the first direction X. Correspondingly, the welding plate 2 is provided with two second positioning holes 25, and the two second positioning holes 25 correspond to the two first positioning holes 16 one by one. The positioning member can be a positioning pin, and the precise positioning of the welding plate 2 can be realized by arranging the positioning pin in the first positioning hole 16 and the second positioning hole 25.

[0074] In some optional embodiments of the present application, as shown in Figure 4 and Figure 7 , the frame 1 has a first direction X, and the frame 1 comprises two first connecting plates 11 and two second connecting plates 12; the two first connecting plates 11 extend along the first direction X, and the two second connecting plates 12 are spaced apart along the first direction X and located between the two first connecting plates 11, and the first connecting plate 11, the second connecting plate 12 and the welding plate 2 enclose the mounting cavity 3; at least one second connecting plate 12 is provided with one of a guide groove 416 or a guide block 121 close to one side of the mounting cavity 3; the turnover member 4 is provided with the other one of the guide groove 416 or the guide block 121 at a position corresponding to the second connecting plate 12, and the guide block 121 is embedded in the guide groove 416.

[0075] In the embodiments of the present application, since the second connecting plate 12 and the turnover member 4 are respectively provided with the guide block 121 and the guide groove 416, when the turnover member 4 is installed into the mounting cavity 3, the movement of the turnover member 4 can be guided and finally embedded in the mounting cavity 3 through the cooperation of the guide block 121 and the guide groove 416, which is beneficial to the convenient assembly of the turnover member 4 and the frame 1 and improves the assembly precision of the two.

[0076] It should be noted that the drawings of the present application only show the case that the guide block 121 is arranged on the second connecting plate 12 and the guide groove 416 is arranged on the turnover member 4, but in actual application, the guide block 121 can be arranged on the turnover member 4 and the guide groove 416 can be arranged on the second connecting plate 12, which is not limited herein. In addition, the guide block 121 and the guide groove 416 of the embodiments of the present application are each provided with at least one, and the number of the guide block 121 and the guide groove 416 is one-to-one. In one of the embodiments, as shown in Figure 4 and Figure 7 , the base 41 is provided with two positioning grooves 23 on the side away from the cover plate 42, and the two positioning grooves 23 are spaced apart along the second direction Y. Correspondingly, the second connecting plate 12 is provided with two positioning blocks 14 on the side close to the base 41, and one positioning block 14 is embedded in one positioning groove 23. It can be understood that the shapes and sizes of the two positioning blocks 14 can be consistent or inconsistent, which is not limited herein, and the person skilled in the art can adjust according to actual needs.

[0077] In practical applications, the welding jig usually needs to be placed in a specific position (such as a welding platform) of an existing welding device for subsequent welding work. As shown in Figure 8 In order to accurately install the welding jig on the welding platform, the second connecting plate 12 located below is provided with a foolproof groove 122 extending along the second direction Y on the side away from the installation cavity 3, and the end of the foolproof groove 122 is provided with a metal positioning block 123. By matching the foolproof groove 122 with the foolproof block of the welding platform, the accurate positioning of the welding jig can be achieved. Since the frame 1 of the welding jig is usually made of non-metallic material, the end of the foolproof groove 122 will be frequently collided by the foolproof block during the matching process. By providing the metal positioning block 123 at the end of the foolproof groove 122, the problem of reduced service life of the welding jig caused by wear of the end of the foolproof groove 122 can be avoided.

[0078] In some optional embodiments of the present application, the frame 1 further comprises at least one third connecting plate 13, which is arranged in parallel with the second connecting plate 12 and located between the two second connecting plates 12 to divide the installation cavity 3 into multiple sub-installation cavities 31; and the turnover part 4 is provided in at least two, one of which is detachably connected in one sub-installation cavity 31.

[0079] In the embodiments of the present application, by arranging at least one third connecting plate 13 between the two second connecting plates 12, the installation cavity 3 can be divided into multiple sub-installation cavities 31. In this way, multiple turnover parts 4 can be placed at the same time, i.e. multiple groups of battery packs can be welded at the same time, which is beneficial to improve the welding efficiency.

[0080] It should be noted that the number of third connecting plates 13 is not limited in the embodiments of the present application, and those skilled in the art can adjust it according to actual needs. In one of the embodiments, one third connecting plate 13 is provided to divide the installation cavity 3 into two sub-installation cavities 31, and one sub-installation cavity 31 corresponds to one turnover part 4. In addition, when the base 41 of the turnover part 4 is provided with one of the guide groove 416 or the guide block 121, the side of the third connecting plate 13 close to the base 41 can be provided with the other one of the guide groove 416 or the guide block 121. By matching the guide groove 416 and the guide block 121, the movement of the turnover part 4 can be guided and finally embedded in the installation cavity 3, which is beneficial to the convenient assembly of the turnover part 4 and the frame 1 and improves the assembly precision of the two.

[0081] As shown in Figures 9 to 10As shown, in some optional embodiments of the present application, the welding plate 2 further comprises a placing groove 22; the placing groove 22 is arranged on the side of the welding plate 2 close to the mounting cavity 3 and corresponds to the welding hole 21, and the placing groove 22 is used for placing the electric connecting sheet; the placing groove 22 is provided with a magnetic piece 221, and the magnetic piece 221 is used for adsorbing the electric connecting sheet.

[0082] In the embodiment of the present application, by arranging the placing groove 22 on the side of the welding plate 2 close to the mounting cavity 3, the placing groove 22 is provided with the magnetic piece 221, so that the electric connecting sheet can be adsorbed to be embedded in the placing groove 22, and then the electric connecting sheet can be limited, so that the electric connecting sheet is welded in position with the electrode terminal, which is beneficial to improve the welding precision of the electric connecting sheet and the electrode terminal.

[0083] It should be noted that, since the shape of the placing groove 22 is closely related to the shape and arrangement of the electric connecting sheet itself, the shape of the placing groove 22 is not limited in the embodiment of the present application, and a person skilled in the art can adjust it according to actual needs. In addition, the electric connecting sheet of the embodiment of the present application includes but is not limited to a nickel sheet.

[0084] In some optional embodiments of the present application, the welding plate 2 further comprises a handle 26, and the handle 26 is arranged on at least part of the edge of the welding plate 2 and protrudes from the frame 1. By arranging the handle 26, the disassembly of the welding plate 2 can be assisted, which is beneficial to improve the disassembly convenience of the welding plate 2.

[0085] It should be noted that the number and position of the handle 26 are not limited in the embodiment of the present application, and a person skilled in the art can adjust it according to needs. In one embodiment, the handle 26 is provided with two, and the two handles 26 are arranged on the two edges of the welding plate 2 arranged away from each other along the second direction Y, and the handle 26 is located in the middle region of each edge.

[0086] In summary, the welding jig provided by the embodiment of the present application at least has the following advantages:

[0087] In the embodiment of the present application, the turnover piece capable of fixing a plurality of battery cells is arranged, and the turnover piece is detachably connected in the mounting cavity formed by the frame and the welding plate. In this way, after welding, when the plurality of battery cells are welded to form a battery pack, the turnover piece and the battery pack can be detached and transferred to the next process together, so that the problem of disassembly of the battery pack during the transfer process can be effectively avoided.

[0088] In the description of the present specification, the description referring to the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the exemplary description of the above terms does not necessarily mean the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0089] Although the embodiments of the present application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made thereto without departing from the principles and spirit of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. A soldering fixture, characterized by, The welding jig comprises a frame (1), a welding plate (2) and a turnover piece (4); The welding plate (2) is detachably connected to the frame (1) and forms an installation cavity (3) with the frame (1), and the welding plate (2) is provided with a welding hole (21); The turnover piece (4) is used for fixing a plurality of battery cells (5), the welding position of the battery cell (5) is opposite to the welding hole (21), a plurality of battery cells (5) are welded to form a battery pack, and the turnover piece (4) is detachably connected in the installation cavity (3) so that the turnover piece (4) is transferred together with the battery pack.

2. The soldering fixture of claim 1, wherein, The turnover piece (4) has a first direction (X) and a second direction (Y), the first direction (X) intersects the second direction (Y), and the turnover piece (4) comprises a base (41) and a cover plate (42) which are arranged along the first direction (X) and connected to each other; The base (41) is provided with a plurality of first profiling grooves (412) arranged along the second direction (Y); The cover plate (42) is provided with a second profiling groove (422) at a position corresponding to the first profiling groove (412), the second profiling groove (422) and the first profiling groove (412) form a fixing groove (43) therebetween, and the fixing groove (43) is used for fixing the battery cell (5).

3. The soldering fixture of claim 2, wherein, The turnover piece (4) also has a third direction (Z), the third direction (Z) intersects the first direction (X) and the second direction (Y) respectively, and the battery cell (5) is provided with an electrode terminal at both ends along the third direction (Z); The first profiling groove (412) and the second profiling groove (422) are respectively provided with an avoiding area (413) at both ends along the third direction (Z), and the avoiding area (413) is used for avoiding the electrode terminal.

4. The soldering fixture of claim 1, wherein, The frame (1) is provided with a first suction piece on one side close to the welding plate (2); The welding plate (2) is provided with a second suction piece at a position corresponding to the first suction piece, and the second suction piece is attracted to the first suction piece.

5. The soldering fixture of claim 1, wherein, The frame (1) is provided with one of a positioning block (14) or a positioning groove (23) on one side close to the welding plate (2); The welding plate (2) is provided with the other one of the positioning block (14) or the positioning groove (23) at a position corresponding to the frame (1), and the positioning block (14) is embedded in the positioning groove (23).

6. The soldering fixture of claim 1, wherein, The frame (1) is provided with a first positioning hole (16) on one side close to the welding plate (2); The welding plate (2) is provided with a second positioning hole (25) at a position corresponding to the first positioning hole (16); The welding jig further comprises a positioning piece which is arranged through the first positioning hole (16) and the second positioning hole (25).

7. The soldering fixture of claim 1, wherein, The frame (1) has a first direction (X), and the frame (1) comprises two first connecting plates (11) and two second connecting plates (12); Two first connecting plates (11) extend along the first direction (X), two second connecting plates (12) are arranged at intervals along the first direction (X) and are located between the two first connecting plates (11), and the first connecting plates (11), the second connecting plates (12) and the welding plate (2) enclose the mounting cavity (3); At least one of the second connecting plates (12) is provided with one of a guide groove (416) or a guide block (121) on a side close to the mounting cavity (3); The turnover part (4) is provided with the other one of the guide groove (416) or the guide block (121) at a position corresponding to the second connecting plate (12), and the guide block (121) is embedded in the guide groove (416).

8. The soldering fixture of claim 7, wherein, The frame (1) further comprises at least one third connecting plate (13), the third connecting plate (13) is arranged in parallel with the second connecting plate (12) and is located between the two second connecting plates (12) to divide the mounting cavity (3) into a plurality of sub-mounting cavities (31); The turnover part (4) is provided with at least two, and one turnover part (4) is detachably connected in one sub-mounting cavity (31).

9. The soldering fixture of claim 1, wherein, The welding plate (2) further comprises a placing groove (22); The placing groove (22) is arranged on a side of the welding plate (2) close to the mounting cavity (3) and corresponds to the welding hole (21), and the placing groove (22) is used for placing an electrically connecting sheet; The placing groove (22) is provided with a magnetic part (221), and the magnetic part (221) is used for adsorbing the electrically connecting sheet.

10. The soldering fixture of claim 1, wherein, The welding plate (2) further comprises a handle (26), and the handle (26) is arranged on at least part of an edge of the welding plate (2) and protrudes from the frame (1).

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