CN117840665B

CN117840665B - Welding fixture

Info

Publication number: CN117840665B
Application number: CN202311842583.8A
Authority: CN
Inventors: 李永富; 王安国; 黄奕城
Original assignee: Zhuhai Kechuang Energy Storage Technology Co ltd
Current assignee: Zhuhai Kechuang Energy Storage Technology Co ltd
Priority date: 2023-12-28
Filing date: 2023-12-28
Publication date: 2024-07-26
Anticipated expiration: 2043-12-28
Also published as: CN117840665A

Abstract

The invention provides a welding tool which comprises a support frame and a mounting piece, wherein the support frame is provided with a containing cavity for containing a battery module and a welding opening communicated with the containing cavity; the support frame is used for fixing the battery module in the accommodating cavity; the inner wall of the welding opening is convexly provided with a first protruding part, and the first protruding part is used for abutting against a connecting row which is arranged on the battery module and is positioned at the welding opening so as to position the connecting row; the mounting piece is provided with a welding nozzle, is arranged on the support frame and is movably arranged relative to the support frame, so that the mounting piece has a welding position and an avoiding position far away from the support frame; when the mounting member is in its welding position, at least a portion of the welding nozzle on the mounting member extends into the welding opening to weld the connecting row to the battery module.

Description

Welding fixture

Technical Field

The invention relates to the technical field of welding, in particular to a welding tool.

Background

During the production of the battery, a welding operation is included in which a nickel plate or metal bar is welded to the electrodes of the cells.

In the prior art, the welding operation process is complex and inconvenient.

Disclosure of Invention

The invention mainly aims to provide a welding tool, so that the welding operation of welding a nickel sheet or a metal bar on an electrode of a battery cell is convenient.

In order to achieve the above object, the present invention provides a welding tool, which includes: the support frame is provided with a containing cavity for containing the battery module and a welding opening communicated with the containing cavity; the support frame is used for fixing the battery module in the accommodating cavity; the inner wall of the welding opening is convexly provided with a first protruding part, and the first protruding part is used for abutting against a connecting row which is arranged on the battery module and is positioned at the welding opening so as to position the connecting row; the mounting piece is provided with a welding nozzle and is arranged on the support frame and is movably arranged relative to the support frame, so that the mounting piece has a welding position and an avoiding position far away from the support frame; when the mounting member is in its welding position, at least a portion of the welding nozzle on the mounting member extends into the welding opening to weld the connecting row to the battery module.

Further, a welding nozzle unit is arranged on the mounting piece and comprises at least one welding nozzle, and the number of the welding nozzle units is at least one; at least one welding opening is formed; when the welding nozzle unit and the welding opening are one, and when the mounting piece is at the welding position, at least part of the welding nozzle unit extends into the welding opening; when the welding nozzle units and the welding openings are multiple, the welding nozzle units and the welding openings are arranged in a one-to-one correspondence manner; at least a portion of the welding tip of each welding tip unit extends into the corresponding welding opening when the mounting member is in its welding position.

Further, the welding opening is a strip-shaped opening, a plurality of first protruding parts are convexly arranged on the inner wall of the welding opening, and the plurality of first protruding parts are arranged at intervals along the length direction of the welding opening; and/or the mounting member is rotatably disposed relative to the support frame; and/or the support frame is fixedly provided with a supporting part, and when the mounting piece is positioned at the avoiding position, the mounting piece is positioned above the supporting part so that the supporting part supports the mounting piece; and/or the support frame comprises a frame body and a cover body detachably connected with the frame body, the accommodating cavity is arranged on the frame body, and the welding opening is arranged on the cover body; the mounting piece is arranged on the cover body and is movably arranged relative to the cover body; when the mounting piece is positioned at the welding position, the mounting piece and the frame body are locked through the first locking component, and the cover body is fixed between the mounting piece and the frame body.

Further, the welding fixture also comprises a positioning mechanism, wherein the positioning mechanism comprises positioning pieces distributed on two opposite sides of the support frame, the two positioning pieces are movably arranged along the direction of approaching or separating from each other, and two opposite sides of the support frame are respectively provided with a positioning opening communicated with the accommodating cavity; the two locating pieces are respectively abutted with the battery module in the accommodating cavity through the two locating openings, so that the battery module is fixed and located under the clamping effect of the two locating pieces.

Further, the battery module comprises one or more electric cores, the positioning piece comprises one or more positioning parts, and the positioning parts are provided with positioning grooves; when the battery core is one, each positioning piece comprises a positioning part; opposite sides of the battery core are respectively clamped in positioning grooves of the positioning parts of the two positioning pieces; when the number of the electric cores is multiple, each positioning piece comprises a plurality of positioning parts, and the positioning parts of each positioning piece are arranged in one-to-one correspondence with the electric cores; opposite sides of each cell are respectively clamped in the positioning grooves of the corresponding positioning parts of the two positioning pieces.

Further, the positioning groove is provided with two groove side walls which are oppositely arranged, and the two groove side walls of the positioning groove are respectively contacted with the two side surfaces of the battery cell; each groove side wall of the positioning groove gradually approaches the other groove side wall from the notch of the positioning groove to the bottom wall of the groove.

Further, the battery module comprises a plurality of battery cells which are sequentially arranged, the cavity wall of the accommodating cavity is convexly provided with a second protruding part, and a second protruding part is arranged between any two adjacent battery cells; the second protruding part is abutted with the battery cells at two sides of the second protruding part.

Further, the positioning mechanism further comprises a first mounting piece, and penetrating holes are formed in the two positioning pieces; the first mounting piece is arranged in the penetrating holes of the two positioning pieces in a penetrating way, and the two positioning pieces are movably arranged relative to the first mounting piece along the distribution direction of the two positioning pieces; the support frame is arranged on the first mounting piece.

Further, the positioning mechanism further comprises a second mounting piece, and the second mounting piece is connected with the first mounting piece; a first elastic piece is arranged between the positioning piece and the second mounting piece; and/or one of the first mounting piece and the positioning piece is provided with a sliding rail, the other one of the first mounting piece and the positioning piece is connected with the sliding part, the sliding part is slidably arranged on the sliding rail, and the extending direction of the sliding rail is parallel to or the same as the distribution direction of the two positioning pieces.

Further, the positioning mechanism further comprises a driving part, and the driving part is movably arranged along a preset direction; the driving part is provided with a contact surface which is in contact with the positioning pieces, and the contact surface is arranged at an included angle with the preset direction, so that when the driving part moves along the preset direction, the two positioning pieces are close to or far away from each other.

By applying the technical scheme of the invention, the welding tool comprises a support frame and a mounting piece, wherein the support frame is provided with a containing cavity for containing the battery module and a welding opening communicated with the containing cavity; the support frame is used for fixing the battery module in the accommodating cavity; the inner wall of the welding opening is convexly provided with a first protruding part, and the first protruding part is used for being abutted with a connecting row which is placed on the battery module and is positioned at the welding opening, so that the connecting row is positioned by the first protruding part.

The mounting piece is provided with a welding nozzle, is arranged on the support frame and is movably arranged relative to the support frame, so that the mounting piece has a welding position and an avoiding position far away from the support frame; when the mounting member is in its welding position, at least a portion of the welding nozzle on the mounting member extends into the welding opening to weld the connecting row to the battery module.

Specifically, the connection rows are metal rows; for example, the metal bars are aluminum bars, or copper bars, or nickel plates.

Therefore, the welding tool can facilitate the welding operation of welding the nickel sheet or the metal bar on the electrode of the battery cell.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application. In the drawings:

fig. 1 shows a schematic structural view of a welding tool according to the invention;

FIG. 2 shows a schematic structural view of a welding tool according to the invention from another perspective;

Fig. 3 shows a schematic structural view of a cover of the welding tool according to the present invention;

fig. 4 shows a schematic structural view of a positioning part of a welding tool according to the present invention;

fig. 5 shows a schematic structural view of a driving part of a welding tool according to the present invention;

Fig. 6 shows a schematic structural view of a first mounting portion of a welding tool according to the present invention;

FIG. 7 shows a schematic structural view of a first locking assembly and a second locking assembly of a welding tool according to the present invention;

Fig. 8 shows a schematic structural view of a positioning unit of a welding tool according to the present invention;

Fig. 9 shows a schematic diagram of a matching structure of a driving part and two positioning pieces of the welding tool according to the invention.

Wherein the above figures include the following reference numerals:

10. A support frame; 101. a frame body; 102. a cover body; 11. welding the opening; 12. a first projection; 13. a rotating shaft; 131. a fixing seat; 14. a support part; 141. a connecting piece; 15. a first locking assembly; 151. a first lock body; 152. a second lock body; 16. a second locking assembly; 161. a third lock body; 162. a fourth lock body; 17. positioning the opening; 18. a second projection;

20. A mounting member; 21. a welding nozzle; 211. a welding nozzle unit;

30. A positioning piece; 31. a positioning part; 311. a positioning groove; 312. a first slot sidewall; 313. a guide rod; 314. a stop portion; 315. a second elastic member; 32. penetrating holes; 33. a first connection portion; 331. a connection hole; 34. a second connecting portion; 35. a third connecting portion; 36. a sliding part; 37. a roller;

41. A first mounting member; 411. a slide rail; 42. a second mounting member; 421. a relief opening; 422. a second mounting portion; 423. a first mounting portion; 43. a first elastic member; 44. a driving section; 441. a contact surface; 45. a power member;

200. a battery module; 210. a battery cell; 300. and connecting rows.

Detailed Description

It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other. The application will be described in detail below with reference to the drawings in connection with embodiments.

It should be noted that the following detailed description is illustrative and is intended to provide further explanation of the application. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.

The invention provides a welding fixture, please refer to fig. 1 to 9, the welding fixture comprises a support frame 10 and a mounting piece 20, wherein the support frame 10 is provided with a containing cavity for containing a battery module 200 and a welding opening 11 communicated with the containing cavity; the support frame 10 is used for fixing the battery module 200 in the accommodating cavity; the inner wall of the welding opening 11 is convexly provided with a first protrusion 12, and the first protrusion 12 is used to abut against the connection row 300 placed on the battery module 200 at the welding opening 11 such that the first protrusion 12 positions the connection row 300.

The mounting piece 20 is provided with a welding nozzle 21, and the mounting piece 20 is arranged on the support frame 10 and is movably arranged relative to the support frame 10 so that the mounting piece 20 has a welding position and an avoiding position far away from the support frame 10; when the mounting member 20 is in its welding position, at least part of the welding nozzle 21 of the mounting member 20 protrudes into the welding opening 11 to weld the connection string 300 to the battery module 200.

Specifically, when at least part of the welding tip 21 protrudes into the welding opening 11, the welding tip 21 abuts against the connection row 300 on the battery module 200.

Specifically, the connection row 300 is a metal row; for example, the metal bars are aluminum bars, or copper bars, or nickel plates.

In the present embodiment, the mounting member 20 is provided with a welding nozzle unit 211, the welding nozzle unit 211 includes at least one welding nozzle 21, and the number of welding nozzle units 211 is at least one; the number of the welding openings 11 is at least one.

When the welding nozzle unit 211 and the welding opening 11 are both one, the connection row 300 is one, and the connection row 300 is placed on the battery module 200 at the welding opening 11; when the mount 20 is in its welding position, at least a portion of each welding nozzle 21 of the welding nozzle unit 211 protrudes into the welding opening 11 to weld the connection string 300 to the battery module 200.

When the welding nozzle units 211 and the welding openings 11 are plural, the plural welding nozzle units 211 and the plural welding openings 11 are arranged in one-to-one correspondence, and the plural connection rows 300 are plural, the plural connection rows 300 are arranged in one-to-one correspondence with the plural welding openings 11, and each connection row 300 is placed on the battery module 200 and at the corresponding welding opening 11; when the mount 20 is in its welding position, at least a portion of each welding nozzle 21 of each welding nozzle unit 211 protrudes into the corresponding welding opening 11 to weld the corresponding connection row 300 to the battery module 200.

In the present embodiment, for each welding opening 11: the welding opening 11 is a strip-shaped opening, a plurality of first protruding portions 12 are protruding from the inner wall of the welding opening 11, and the plurality of first protruding portions 12 are arranged at intervals along the length direction of the welding opening 11.

Specifically, when the welding nozzle unit 211 includes a plurality of welding nozzles 21, the plurality of welding nozzles 21 are distributed along the length direction of the corresponding welding opening 11.

Specifically, the longitudinal directions of the plurality of welding openings 11 are all parallel.

In this embodiment, the mount 20 is rotatably disposed with respect to the support frame 10.

Specifically, a rotating shaft 13 is arranged on the support frame 10, the rotating shaft 13 is rotatably arranged around the central axis of the rotating shaft 13 relative to the support frame 10, and the rotating shaft 13 is positioned at the outer side of the support frame 10; the mounting member 20 is fixedly connected with the rotating shaft 13 such that the mounting member 20 can rotate relative to the support frame 10 about the central axis of the rotating shaft 13.

Alternatively, the axial direction of the rotating shaft 13 is parallel to the length direction of the welding opening 11.

Specifically, two fixing bases 131 are fixedly arranged on the outer side wall of the support frame 10, and the rotating shaft 13 is rotatably arranged on the two fixing bases 131 in a penetrating manner around the central axis of the rotating shaft; along the axial direction of the rotating shaft 13, two fixing bases 131 are respectively located at two ends of the rotating shaft 13.

In the present embodiment, the support frame 10 is fixedly provided with a support portion 14; when the mount 20 is in its retracted position, the mount 20 is positioned above the support portion 14, and the support portion 14 abuts the mount 20 such that the support portion 14 supports the mount 20.

Specifically, the supporting portion 14 has a rod-shaped structure, the lower end of the supporting portion 14 is fixedly connected with the supporting frame 10, and the upper end of the supporting portion 14 abuts against the mounting member 20. Alternatively, the support portion 14 is provided to extend in the vertical direction.

Specifically, the lower end of the supporting portion 14 and the supporting frame 10 are connected by a connecting member 141.

In the present embodiment, the support frame 10 includes a frame body 101 and a cover body 102 detachably connected to the frame body 101, the accommodating chamber is provided on the frame body 101, and the welding opening 11 is provided on the cover body 102; the mounting member 20 is disposed on the cover 102 and is movably disposed relative to the cover 102 such that the mounting member 20 has a welding position and an evasive position away from the cover 102; when the mounting member 20 is at its welding position, the mounting member 20 and the frame 101 are locked by the first locking assembly 15, and the cover 102 is located between the mounting member 20 and the frame 101, so that the cover 102 can be fixed between the mounting member 20 and the frame 101.

Specifically, the cover 102 is located above the frame 101.

Specifically, the battery module 200 is put into the receiving chamber or the battery module 200 in the receiving chamber is taken out by opening the cover 102.

Specifically, the first locking assembly 15 is unlocked prior to opening the cover 102.

Specifically, the first locking component 15 is a locking structure; the first locking assembly 15 includes a first lock body 151 and a second lock body 152, the first lock body 151 and the second lock body 152 are respectively disposed on the mounting member 20 and the frame body 101, and at least a portion of the second lock body 152 is movably disposed to be fastened to the first lock body 151 or separated from the first lock body 151.

Specifically, the supporting portion 14 is fixedly provided on the cover 102, that is, the connecting member 141 is fixedly provided on the cover 102.

Specifically, both the fixing bases 131 are fixedly disposed on the cover 102.

In this embodiment, the cover 102 and the frame 101 are locked by the second locking assembly 16. Before opening the cover 102, both the first locking assembly 15 and the second locking assembly 16 are unlocked.

Specifically, the second locking assembly 16 includes a third lock body 161 and a fourth lock body 162, the third lock body 161 and the fourth lock body 162 are respectively disposed on the cover 102 and the frame 101, and at least a portion of the fourth lock body 162 is movably disposed to be fastened to the third lock body 161 or separated from the third lock body 161.

Optionally, the second locking assemblies 16 are plural, and the plural second locking assemblies 16 are distributed along the circumference of the cover 102; the plurality of second locking assemblies 16 and the first locking assemblies 15 are distributed along the circumferential direction of the cover 102.

Optionally, third lock bodies 161 are disposed on the holders 131, and each holder 131 is provided with a third lock body 161.

In this embodiment, the welding fixture further includes a positioning mechanism, the positioning mechanism includes positioning members 30 distributed on opposite sides of the support frame 10, the two positioning members 30 are movably disposed along a direction approaching or separating from each other, and the opposite sides of the support frame 10 are provided with positioning openings 17 communicating with the accommodating cavity; the two positioning pieces 30 are respectively arranged in one-to-one correspondence with the two positioning openings 17, and each positioning piece 30 is abutted with the battery module 200 in the accommodating cavity through the corresponding positioning opening 17 so as to fix and position the battery module 200 under the clamping effect of the two positioning pieces 30.

Specifically, the positioning opening 17 is provided on the frame body 101.

In the present embodiment, the battery module 200 includes one or more battery cells 210, the positioning member 30 includes one or more positioning portions 31, and the positioning portions 31 have positioning grooves 311.

When the number of the battery cells 210 is one, each positioning member 30 includes one positioning portion 31; opposite sides of the battery cell 210 are respectively clamped in the positioning grooves 311 of the positioning parts 31 of the two positioning pieces 30; the distribution directions of the opposite sides of the battery cell 210 are parallel or the same as the distribution directions of the opposite sides of the support frame 10.

When the number of the battery cells 210 is plural, the plural battery cells 210 of the battery module 200 are distributed in sequence; each positioning piece 30 comprises a plurality of positioning parts 31, and the positioning parts 31 of each positioning piece 30 are arranged in one-to-one correspondence with the battery cells 210; opposite sides of each cell 210 are respectively clamped in the positioning grooves 311 of the corresponding positioning parts 31 of the two positioning pieces 30; the distribution direction of the opposite sides of each cell 210 is perpendicular to the distribution direction of the plurality of cells 210.

In this embodiment, the positioning slot 311 has two opposite slot sidewalls, and the two slot sidewalls of the positioning slot 311 are respectively contacted with two sides of the battery cell 210; the distribution directions of the two groove side walls of the positioning groove 311 are perpendicular to the distribution directions of the two opposite sides of the battery cell 210; from the notch of the positioning groove 311 to the direction of the bottom wall of the groove, each groove side wall of the positioning groove 311 is gradually close to the other groove side wall; in this way, the battery cell 210 can be relatively stably clamped in the positioning groove 311, the positioning groove 311 can be suitable for battery cells 210 with different thicknesses, and the thickness direction of the battery cell 210 is parallel to or the same as the distribution direction of the two groove side walls of the positioning groove 311.

The two first groove side walls 312 in the figure are two groove side walls provided in pairs of the positioning grooves 311.

In this embodiment, the battery module 200 includes a plurality of sequentially arranged battery cells 210, the cavity wall of the accommodating cavity is convexly provided with the second protruding portion 18, and one second protruding portion 18 is arranged between any two adjacent battery cells 210; the second protruding portion 18 abuts against the battery cells 210 on two sides of the second protruding portion. The second protruding portion 18 may fix the battery cells 210 at both sides thereof.

Specifically, the second projection 18 is provided on the cover 102.

In this embodiment, the positioning mechanism further includes a first mounting member 41, and the two positioning members 30 are provided with penetrating holes 32; the first mounting piece 41 is arranged in the penetrating holes 32 of the two positioning pieces 30 in a penetrating manner, and the two positioning pieces 30 are movably arranged relative to the first mounting piece 41 along the distribution direction of the two positioning pieces; the support frame 10 is provided on the first mounting member 41, and the first mounting member 41 supports the support frame 10.

Specifically, the frame body 101 is fixedly provided on the first mounting member 41.

Specifically, the positioning member 30 includes a first connecting portion 33 and a second connecting portion 34 that are connected and fixed to each other, all positioning portions 31 of the positioning member 30 are disposed on the first connecting portion 33, and the penetrating hole 32 is disposed on the second connecting portion 34.

In this embodiment, the positioning mechanism further includes a second mounting member 42, where the second mounting member 42 is fixedly connected to the first mounting member 41; a first elastic member 43 is disposed between each positioning member 30 and the second mounting member 42, and the extending and contracting direction of the first elastic member 43 is parallel to or the same as the distribution direction of the two positioning members 30.

Specifically, along the expansion and contraction direction of the first elastic member 43, both ends of the first elastic member 43 are fixedly connected with the positioning member 30 and the second mounting member 42, respectively.

Alternatively, the first elastic member 43 is a spring.

Specifically, both ends of the first elastic member 43 are fixedly connected with the second connecting portion 34 and the second mounting member 42, respectively.

In the present embodiment, one of the first mounting member 41 and the positioning member 30 is provided with a slide rail 411, the other is connected to the sliding portion 36, and the sliding portion 36 is slidably provided on the slide rail 411; the extending direction of the sliding rail 411 is parallel to or the same as the distribution direction of the two positioning members 30; when the positioning members 30 move in the distribution direction of the two positioning members 30, the sliding portion 36 slides along the slide rail 411 to guide the movement of the positioning members 30.

Optionally, the first mounting member 41 is provided with a sliding rail 411, and the positioning member 30 is connected with the sliding portion 36. Further, the positioning member 30 further includes a third connecting portion 35 connected to the second connecting portion 34, and the sliding portion 36 is connected to the third connecting portion 35.

In the present embodiment, the positioning mechanism further includes a driving portion 44, the driving portion 44 being movably provided in a preset direction; the driving portion 44 has a contact surface 441 contacting the positioning member 30, where the contact surface 441 forms an included angle with a preset direction, so that when the driving portion 44 moves along the preset direction, the two positioning members 30 approach or separate from each other.

In the implementation process, when the driving part 44 drives the two positioning members 30 to move away from each other, the first elastic member 43 is compressed; the driving part 44 is returned along the original path, and the two positioning members 30 approach each other by the elastic force of the first elastic member 43.

Specifically, the positioning member 30 is provided with a roller 37, the roller 37 is rotatably provided on the positioning member 30 about its central axis, and the contact surface 441 of the driving portion 44 is for contact with the roller 37.

Specifically, the positioning member 30 is fixedly provided with a supporting shaft, and the roller 37 is sleeved on the supporting shaft and rotatably arranged around the supporting shaft, that is, the roller 37 is coaxially arranged with the supporting shaft.

Specifically, the support shaft is penetrated on the third connection part 35.

In this embodiment, the welding tool further includes a power member 45, and an output portion of the power member 45 is connected to the driving portion 44 to drive the driving portion 44 to move along a preset direction.

Specifically, the output portion of the power member 45 is telescopically arranged in a preset direction.

Specifically, the power member 45 is a cylinder.

Specifically, the second mounting member 42 is provided with a yielding opening 421, and the driving portion 44 is disposed in the yielding opening 421 in a penetrating manner; the body of the power member 45 is fixedly coupled to the second mounting member 42.

In the present embodiment, the second mounting member 42 includes a first mounting portion 423 and two second mounting portions 422, where the two second mounting portions 422 are fixedly disposed on the first mounting portion 423 and are distributed at intervals, and the distribution direction of the two second mounting portions 422 is parallel to or the same as the distribution direction of the two positioning members 30.

Specifically, the relief opening 421 is provided on the first mounting portion 423; the first mounting portion 423 is disposed opposite to the first mounting member 41, and the third connecting portion 35 is located between the first mounting portion 423 and the first mounting member 41.

Specifically, the two second mounting portions 422 are provided in one-to-one correspondence with the two positioning members 30; along the distribution direction of the two positioning members 30, each second mounting portion 422 is located outside the corresponding positioning member 30; both ends of the first elastic member 43 are fixedly connected to the second connection portion 34 and the second mounting portion 422, respectively.

In the present embodiment, the two contact surfaces 441 of the driving portion 44 for contacting the two positioning members 30 have the same included angle with the preset direction, so that the movement strokes of the two positioning members 30 are the same, which is beneficial to centering the battery module 200 in the distribution direction of the two positioning members 30.

Specifically, the lengths (in the non-stretched state) and the elastic strengths of the two first elastic members 43 corresponding to the two positioning members 30 are the same, so that the battery module 200 is centrally disposed in the distribution direction of the two positioning members 30.

In the present embodiment, each positioning member 30 includes a plurality of positioning units, each positioning unit including a connection hole 331, one positioning portion 31, a guide bar 313, a stopper 314, and a second elastic member 315; in each positioning unit, a connecting hole 331 is formed in the first connecting portion 33, a first end of a guide rod 313 is fixedly connected with the positioning portion 31, the guide rod 313 is movably arranged in the connecting hole 331 in a penetrating manner along the axial direction of the guide rod 313, a second end of the guide rod 313 is provided with a stop portion 314, and the stop portion 314 is positioned on one side of the first connecting portion 33 away from the positioning portion 31 so as to prevent the guide rod 313 from being separated from the connecting hole 331; along the extending and contracting direction of the second elastic member 315, the second elastic member 315 has a first end and a second end that are disposed opposite to each other, the second elastic member 315 is disposed between the positioning portion 31 and the first connecting portion 33, and the first end and the second end of the second elastic member 315 are respectively connected to or abutted against the positioning portion 31 and the first connecting portion 33, so that the positioning portion 31 is in flexible contact with the battery cell 210.

Specifically, the second elastic member 315 is a spring, and the second elastic member 315 is sleeved on the guide rod 313.

Specifically, each positioning unit includes a plurality of connection holes 331, a plurality of guide rods 313, a plurality of stop portions 314, and a plurality of second elastic members 315, wherein first ends of the plurality of guide rods 313 are fixedly connected with the positioning portions 31, the plurality of guide rods 313 are disposed in one-to-one correspondence with the plurality of connection holes 331, the plurality of guide rods 313 are disposed in one-to-one correspondence with the plurality of stop portions 314, and the plurality of second elastic members 315 are disposed in one-to-one correspondence with the plurality of guide rods 313.

From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

In the welding fixture provided by the invention, the welding fixture comprises a support frame 10 and a mounting piece 20, wherein the support frame 10 is provided with a containing cavity for containing the battery module 200 and a welding opening 11 communicated with the containing cavity; the support frame 10 is used for fixing the battery module 200 in the accommodating cavity; the inner wall of the welding opening 11 is convexly provided with a first protrusion 12, and the first protrusion 12 is used to abut against the connection row 300 placed on the battery module 200 at the welding opening 11 such that the first protrusion 12 positions the connection row 300.

It should be noted that the terms "first," "second," and the like in the description and the claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that embodiments of the application described herein may be capable of being practiced otherwise than as specifically illustrated and described. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

Spatially relative terms, such as "above … …," "above … …," "upper surface on … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations "above … …" and "below … …". The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. Welding frock, its characterized in that includes:

A support frame (10), wherein the support frame (10) is provided with a containing cavity for containing the battery module (200) and a welding opening (11) communicated with the containing cavity; the support frame (10) is used for fixing the battery module (200) in the accommodating cavity; a first protruding part (12) is protruding from the inner wall of the welding opening (11), and the first protruding part (12) is used for abutting against a connecting row (300) which is placed on the battery module (200) and is positioned at the welding opening (11) so as to position the connecting row (300); the support frame (10) comprises a frame body (101) and a cover body (102) detachably connected with the frame body (101), the accommodating cavity is arranged on the frame body (101), and the welding opening (11) is arranged on the cover body (102);

A mounting member (20), wherein a welding nozzle (21) is arranged on the mounting member (20), and the mounting member (20) is arranged on the cover body (102) and is rotatably arranged relative to the cover body (102) so that the mounting member (20) has a welding position and an avoidance position far away from the support frame (10); when the mounting piece (20) is in the welding position, the mounting piece (20) and the frame body (101) are locked through a first locking component (15), the cover body (102) is fixed between the mounting piece (20) and the frame body (101), and at least part of a welding nozzle (21) on the mounting piece (20) stretches into the welding opening (11) so as to weld the connecting row (300) on the battery module (200);

The support frame (10) is fixedly provided with a supporting part (14), and when the mounting piece (20) is positioned at the avoiding position, the mounting piece (20) is positioned above the supporting part (14), so that the supporting part (14) supports the mounting piece (20).

2. Welding tool according to claim 1, characterized in that the mounting (20) is provided with a welding nozzle unit (211), the welding nozzle unit (211) comprising at least one of the welding nozzles (21), the welding nozzle unit (211) being at least one; the number of the welding openings (11) is at least one;

when the welding nozzle unit (211) and the welding opening (11) are one, and when the mounting piece (20) is in the welding position, at least part of the welding nozzle (21) of the welding nozzle unit (211) extends into the welding opening (11);

When the welding nozzle units (211) and the welding openings (11) are multiple, the welding nozzle units (211) and the welding openings (11) are arranged in a one-to-one correspondence; when the mounting member (20) is in its welding position, at least part of the welding tip (21) of each welding tip unit (211) protrudes into the corresponding welding opening (11).

3. The welding fixture according to claim 1, wherein,

The welding opening (11) is a strip-shaped opening, a plurality of first protruding portions (12) are protruding on the inner wall of the welding opening (11), and the first protruding portions (12) are arranged at intervals along the length direction of the welding opening (11).

4. Welding tool according to claim 1, characterized in that it further comprises positioning means comprising positioning members (30) distributed on opposite sides of the support frame (10), both positioning members (30) being movably arranged in a direction approaching or moving away from each other, both opposite sides of the support frame (10) being provided with positioning openings (17) communicating with the accommodation cavities;

The two locating pieces (30) are respectively abutted with the battery module (200) in the accommodating cavity through the two locating openings (17) so as to fix and locate the battery module (200) under the clamping effect of the two locating pieces (30).

5. The welding fixture according to claim 4, wherein the battery module (200) comprises one or more battery cells (210), the positioning member (30) comprises one or more positioning parts (31), and the positioning parts (31) are provided with positioning grooves (311);

When the number of the electric cores (210) is one, each positioning piece (30) comprises a positioning part (31); opposite sides of the battery cell (210) are respectively clamped in positioning grooves (311) of the positioning parts (31) of the two positioning pieces (30);

when the number of the electric cores (210) is multiple, each positioning piece (30) comprises a plurality of positioning parts (31), and the positioning parts (31) of each positioning piece (30) are arranged in one-to-one correspondence with the electric cores (210); opposite sides of each battery cell (210) are respectively clamped in positioning grooves (311) of corresponding positioning parts (31) of two positioning pieces (30).

6. The welding fixture according to claim 5, wherein the positioning groove (311) has two groove side walls arranged oppositely, and the two groove side walls of the positioning groove (311) are respectively contacted with the two side surfaces of the electric core (210);

And the side wall of each groove of the positioning groove (311) gradually approaches to the side wall of the other groove from the notch of the positioning groove (311) to the bottom wall of the groove.

7. The welding fixture according to claim 1, wherein the battery module (200) comprises a plurality of battery cells (210) which are sequentially arranged, the cavity wall of the accommodating cavity is convexly provided with a second protruding part (18), and one second protruding part (18) is arranged between any two adjacent battery cells (210); the second protruding part (18) is abutted with the battery cells (210) at two sides of the second protruding part.

8. The welding fixture according to claim 4, wherein the positioning mechanism further comprises a first mounting member (41), and wherein both positioning members (30) are provided with through holes (32); the first mounting pieces (41) are arranged in the penetrating holes (32) of the two positioning pieces (30) in a penetrating mode, and the two positioning pieces (30) are movably arranged relative to the first mounting pieces (41) along the distribution direction of the positioning pieces; the support frame (10) is arranged on the first mounting piece (41).

9. The welding fixture according to claim 8, wherein the positioning mechanism further comprises a second mounting member (42), the second mounting member (42) being connected with the first mounting member (41);

A first elastic piece (43) is arranged between the positioning piece (30) and the second mounting piece (42); and/or

One of the first mounting piece (41) and the positioning piece (30) is provided with a sliding rail (411), the other one is connected with a sliding part (36), the sliding part (36) is slidably arranged on the sliding rail (411), and the extending direction of the sliding rail (411) is parallel to or the same as the distribution direction of the two positioning pieces (30).

10. The welding fixture according to claim 9, wherein the positioning mechanism further comprises a driving portion (44), the driving portion (44) being movably arranged along a preset direction; the driving part (44) is provided with a contact surface (441) which is in contact with the positioning pieces (30), and the contact surface (441) is arranged at an included angle with the preset direction, so that when the driving part (44) moves along the preset direction, the two positioning pieces (30) are close to or far away from each other.