Welding tool for welding connecting sheet and core package tab

Abstract

The utility model discloses a welding tool for welding a connecting piece and a core package tab, and relates to the technical field of battery manufacturing tool design. Comprising a tool base and a first installation area arranged in the middle of the tool base, and core packages are arranged on the two sides of the first installation area; the connecting piece is arranged in the first installation area, a plurality of first limiting pieces are further arranged in the first installation area, the first limiting pieces are movably arranged in the first installation area, and the first limiting pieces correspondingly move and close to each other to cooperatively clamp and fix the connecting piece. According to the welding tool for welding the connecting piece and the core cladding tab, the plurality of movable first limiting pieces are arranged, and the plurality of first limiting pieces are movably drawn close to each other to clamp and fix the connecting piece, so that the connecting piece is kept in the middle position during welding, a top cover is further prevented from inclining, and it is guaranteed that a shell cover can be stably welded.

Description

Technical Field

[0001] The utility model relates to the technical field of battery manufacturing tooling design, in particular to a welding tooling for welding connecting sheets and core package tabs. Background Art

[0002] The Chinese utility model with publication number CN219053218U discloses a compatible ultrasonic welding tool for fixing the core pack to be welded and placing the corresponding connecting piece, so as to facilitate the welding of the core pack tab and the connecting piece. The ultrasonic welding tool includes a first mounting plate and a second mounting plate corresponding to the two sub-core packs, and a positioning plate located between the first mounting plate and the second mounting plate and corresponding to the connecting piece; the horizontal arrangement direction of the first mounting plate, the positioning plate and the second mounting plate is the first direction, and the direction perpendicular to the first direction is the second direction; the upper surfaces of the first mounting plate and the second mounting plate are provided with side limit blocks on opposite sides along the second direction, and the upper surfaces of the first mounting plate and the second mounting plate are provided with rear limit blocks on the sides away from the positioning plates. The modified utility model simplifies the tool changeover, and in the case of a change in battery model and an update of the internal structural parts of the battery, only individual parts of the tool need to be adjusted or replaced to achieve the purpose of changeover.

[0003] However, the above utility model still has the following defects:

[0004] (1) A groove is provided on the positioning plate, and the connecting piece is positioned and limited by being placed in the groove. In order to facilitate the placement of the connecting piece, the size of the groove is usually slightly larger than the size of the connecting piece (when the connecting piece is placed in the groove, there is a gap of at least 0.2 mm between at least one edge of the connecting piece and the corresponding side wall of the groove). Correspondingly, the connecting piece will move after being placed in the groove, resulting in a deviation in the connection position between the core package ear and the connecting piece. In addition, the movement during the welding process will eventually cause the connecting piece to be off-center. After the top cover assembly is welded, the off-center connecting piece will cause the top cover to be tilted (i.e., the undesirable phenomenon of crooked neck). In severe cases, it will also cause the shell cover to be unable to be welded when the core package is subsequently put into the shell.

[0005] (2) The core package is wound by winding the positive and negative electrode sheets and the diaphragm. In order to make the diaphragm completely cover the electrode sheets, the edge of the diaphragm will extend beyond the edge of the electrode sheets by at least 3 mm. This will cause the two ends of the wound core package to have flexible end surfaces due to the extended diaphragm. The position of the limit blocks at both ends of the above-mentioned utility model device cannot be adjusted when fixing the core package of the corresponding model. As a result, the core package is still loose even after being fixed, resulting in different welding distances and causing serious quality defects. Utility Model Content

[0006] The utility model provides a welding tool for welding connecting sheets and core package ears. By setting a plurality of movable first limiting members, and making the plurality of first limiting members move closer to each other to clamp and fix the connecting sheet, the connecting sheet is kept in a centered position during welding, thereby avoiding the top cover from tilting and ensuring that the shell cover can be stably welded.

[0007] The utility model solves the above-mentioned problem by providing a welding tool for welding connecting sheets and core package ears, comprising a tool base and a first installation area arranged in the middle of the tool base, and the core package is arranged on both sides of the first installation area; the connecting sheet is arranged in the first installation area, and a plurality of first limiting members are also arranged in the first installation area, and the plurality of first limiting members are all movably arranged in the first installation area, and the plurality of first limiting members move and close with each other to cooperate in clamping and fixing the connecting sheet.

[0008] Furthermore, it also includes a second push plate movably arranged on the tooling base, the movement direction of the second push plate is consistent with the movement direction of the first limiting member, the second push plate is used to push the core package against the first limiting member, and the first limiting member and the second push plate also cooperate with each other to clamp the limiting core package.

[0009] Furthermore, the plurality of first limiting members are arranged opposite to each other in pairs.

[0010] Furthermore, the core package is pushed along the moving direction of the second push plate against the first limiting member, the first limiting member is arranged at the front end of the core package, and the pole ear of the core package is arranged at the front end of the core package, and the second push plate is arranged at the rear end of the core package; it also includes limiting blocks arranged on the tooling base and respectively located on the left and right sides of the core package, and the limiting blocks on the left and right sides correspond to each other to clamp the limited core package.

[0011] Furthermore, it also includes a push rod assembly arranged at the end of the tooling base, the push rod assembly includes a pushing bracket, a pushing rod axially movably arranged on the pushing bracket, and a quick clamp for pushing the pushing rod to move axially, one end of the pushing rod is fixedly connected to the second push plate, and the other end is connected to the output end of the quick clamp.

[0012] Furthermore, a slide groove is provided on the tooling base, a sliding block adapted to the slide groove is correspondingly provided at the bottom of the first position limiting member, and the first position limiting member is movably arranged on the tooling base via the sliding block and the slide groove.

[0013] Furthermore, the tabs of the core package extend into the first installation area; and a pressure cap is also included for pressing the tabs extending into the first installation area downward onto the corresponding connecting sheets.

[0014] Furthermore, the gland is provided with a gripping portion for easy gripping.

[0015] Furthermore, the gland is provided with a welding window for the welding head of the welding gun to contact and pass through.

[0016] Furthermore, an accommodating groove is provided in the first installation area for accommodating the connecting piece and cooperating with the first limiting member to limit and fix the connecting piece.

[0017] Beneficial effects of the utility model:

[0018] The utility model arranges a plurality of sets of first movable limiting members facing opposite directions in a first installation area where a connecting piece is placed, so that the plurality of limiting members cooperate with each other to movably close and clamp the connecting piece, so that the connecting piece can remain in a constant position during the welding process, thereby effectively preventing the connecting piece from being miscentered.

[0019] Moreover, when the plurality of limit members cooperate with each other to be movable and separated, the enclosed space of the plurality of limit members is correspondingly enlarged, and the technicians also have sufficient operating space to facilitate inserting the connecting piece into the corresponding position in the first installation area or removing the connecting piece from the first installation area.

[0020] In addition, the device is also provided with a second push plate which is pushed by the push rod assembly to press against the bottom flexible end surface of the core package. The second push plate can directly press the flexible diaphragm onto the bottom end surface of the core package under the further thrust of the push rod assembly, and also press the top flexible end surface of the core package against the first limit piece, so that the diaphragm on the top end surface of the core package is also flattened, so that the core package is tightly clamped and fixed and not easy to loosen, so as to effectively avoid the phenomenon that the spacing between the ear and the connecting piece of the battery cells of the same batch is different, so as to improve the manufacturing quality of the battery cells. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings, which are incorporated into the specification and constitute a part of the specification, illustrate embodiments of the utility model and are used together with the description to explain the principles of the utility model. In these drawings, similar reference numerals are used to represent similar elements. The drawings described below are some embodiments of the utility model, rather than all embodiments. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 is the overall structural diagram of the welding tooling of this embodiment;

[0023] Figure 2 It is a structural exploded diagram of the welding tool of this embodiment;

[0024] 1- tooling base, 2- first installation area, 3- core package, 4- connecting piece, 5- first limit piece, 6- second push plate, 7- limit block, 8- push bracket, 9- push rod, 10- quick clamp, 11- slide groove, 12- slide block, 13- pressure cover, 14- holding part, 15- welding window, 16- accommodating groove. DETAILED DESCRIPTION

[0025] The directional terms such as up, down, left, right, front, back, front, back, top, bottom, etc. mentioned or may be mentioned in this specification are defined relative to the structures shown in the drawings. The words "inside" and "outside" refer to the direction toward or away from the geometric center of a specific component, respectively. They are relative concepts, and therefore may change accordingly according to different locations and different usage conditions. Therefore, these or other directional terms should not be interpreted as restrictive terms.

[0026] See also Figure 1 And Figure 1 Taking the direction shown as an example, a specific embodiment of the utility model is a welding tool for welding connecting plates and core package ears, the welding tool comprises a tool base 1 and a first installation area 2. The tool base 1 is rectangular as a whole, the first installation area 2 is arranged in the middle of the tool base 1, the left and right sides of the first installation area 2 are used to place the core package 3, the core package 3 is also fixed on the left and right sides of the first installation area 2, and the ears of the two core packages 3 are extended into the first installation area 2, and then they are respectively contacted and connected with the corresponding connecting plates 4 under the downward pressing action of the pressure cover 13, and finally they are welded to the corresponding connecting plates 4 under the welding process.

[0027] For further information, see Figure 1 and Figure 2 , similarly Figure 1 Taking the direction shown in as an example, in this embodiment, two first stoppers 5 are respectively provided on the left and right sides of the first installation area 2, and the first stoppers 5 on the left and right sides are opposite to each other; four slide grooves 11 are also correspondingly provided on the tooling base 1, and the bottoms of the four first stoppers 5 are correspondingly provided with slide seats adapted to the slide grooves 11, and the four first stoppers 5 are respectively and movably arranged at the four slide grooves 11. In this regard, the four first stoppers 5 can move toward the middle of the first installation area 2 under the action of external force, and then press against the left and right sides of the two connecting pieces 4 arranged in the first installation area 2, thereby clamping and fixing the two connecting pieces 4.

[0028] Moreover, a holding portion 14 is integrally provided at the upper end surface of the pressure cap 13, and the technician can grasp the pressure cap 13 through the holding portion 14 and push the pressure cap 13 downward to press the pole ear onto the connecting piece 4; in addition, four welding windows 15 are also provided on the pressure cap 13, and the four welding windows 15 respectively correspond to the four connection positions of the pole ears and the connecting piece 4 that need to be ultrasonically welded when the two core packs 3 are welded and assembled through the two connecting pieces 4, and the four welding windows 15 can expose these four positions to facilitate the welding operation.

[0029] In this embodiment, the force for pushing the first limit member 5 to move toward the middle of the first installation area 2 comes from the second push plate 6. Specifically, in this embodiment, a second push plate 6 is provided at each of the left and right ends of the tooling base 1. Taking the second push plate 6 at the right end as an example, the right end of the second push plate 6 is fixedly connected to the left ends of three horizontally arranged push rods 9. The three push rods 9 are arranged along the Figure 1 The three push rods 9 are arranged equidistantly in the front-to-back direction, and are horizontally movably inserted on a push bracket 8. The push bracket 8 is correspondingly fixedly installed at the right end of the installation tooling, and the right end of the push rod 9 in the middle is also hingedly connected to the output end of the quick clamp 10. Correspondingly, when the technician presses the quick clamp 10 downward with force, the quick clamp 10 is correspondingly opened by force and pushes the middle push rod 9 to move axially to the left, thereby pushing the core package 3 on the left side of the second push plate 6 to move to the position of the two first limit members 5 on the right side of the first installation area 2. Moreover, when the technician applies further pressure, the second push plate 6 will further push the core package 3 to the left, and then push the first limit member 5 to move to the left to press against the connecting piece 4; and the simultaneous operation of the push components on the left and right sides can make the first limit members 5 on the left and right sides press against and clamp the connecting piece 4 synchronously.

[0030] Furthermore, when the first limiting member 5 on the right side is pressed against the connecting plate 4, the first limiting member 5 is limited to the left, and the first limiting member 5 in turn blocks the second push plate 6 from continuing to move to the left. At this time, the force of the second push plate 6 will directly act on the core package 3, so that the flexible diaphragm on the left end surface of the core package 3 that is in contact with the first limiting member 5 is flattened by the first limiting member 5, and the flexible diaphragm on the right end surface of the core package 3 is flattened by the second push plate 6, and the two first limiting members 5 on the right side of the first installation area 2 cooperate together to clamp the core package 3 at the right end together with the second push plate 6 at the right end, and effectively prevent the core package 3 from moving again.

[0031] In this embodiment, the second push plate 6 at the left end is arranged in exactly the same manner as that at the right end, and will not be described in detail again.

[0032] In addition, Figure 1 Taking the direction shown as an example, in the present embodiment, two accommodating grooves 16 are symmetrically arranged in the middle of the first installation area 2, and the accommodating grooves 16 have groove walls only on the front and rear sides, and the two connecting pieces 4 are respectively arranged in the two accommodating grooves 16; correspondingly, each accommodating groove 16 can cooperate with a first limiting member 5 on the left and right to limit a connecting piece 4 from the front, back, left and right directions at the same time, so that the connecting piece 4 cannot move when it is limited and clamped.

[0033] Similarly, Figure 1Taking the direction shown as an example, in the present embodiment, four limit blocks 7 are fixedly provided on the front and rear sides of the mounting base respectively, and the four limit blocks 7 on the front side and the four limit blocks 7 on the rear side each have two limit blocks 7 located on the left side of the first mounting area 2 and two limit blocks 7 located on the right side of the first mounting area 2; that is to say, two limit blocks 7 are also provided on the front and rear sides of each core package 3 to limit the forward and backward movement of the core package 3, and these four limit blocks 7 cooperate with two limit members and a second push plate 6 to simultaneously limit and fix the core package 3 in four directions of front, back, left and right, so as to effectively prevent the core package 3 from moving, and finally the pole ears of the core package 3 are accurately positioned and connected with the connecting piece 4, so as to ensure the connection quality of the pole ears of the core package 3 and the connecting piece 4.

[0034] Anything not mentioned above is applicable to the prior art.

[0035] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model is described in detail with reference to the above embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the above embodiments, or replace some of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the utility model.

Claims

1. A welding tool for welding connecting sheets and core package tabs, characterized in that: The tooling base (1) comprises a first installation area (2) arranged in the middle of the tooling base (1), the core package (3) being arranged on both sides of the first installation area (2); a connecting piece (4) being arranged in the first installation area (2), a plurality of first limiting members (5) being arranged in the first installation area (2), the plurality of first limiting members (5) being movably arranged in the first installation area (2), and the plurality of first limiting members (5) correspondingly moving and closing with each other to cooperate in clamping and fixing the connecting piece (4).

2. The welding tool for welding the connecting piece and the core package tab according to claim 1, characterized in that: It also comprises a second push plate (6) movably arranged on the tooling base (1), the movement direction of the second push plate (6) being consistent with the movement direction of the first limiting member (5), the second push plate (6) being used to push the core package (3) against the first limiting member (5), and the first limiting member (5) and the second push plate (6) also cooperate with each other to clamp the limiting core package (3).

3. The welding tool for welding the connecting piece and the core package tab according to claim 1, characterized in that: The plurality of first limiting members (5) are arranged opposite to each other in pairs.

4. The welding tool for welding the connecting piece and the core package tab according to claim 2, characterized in that: The second push plate (6) pushes the core package (3) to press against the first limit member (5) in the moving direction, the first limit member (5) is arranged at the front end of the core package (3), and the pole ear of the core package (3) is arranged at the front end of the core package (3), and the second push plate (6) is arranged at the rear end of the core package (3); and also includes limit blocks (7) arranged on the tooling base (1) and respectively located on the left and right sides of the core package (3), and the limit blocks (7) on the left and right sides correspond to each other to clamp the limit core package (3).

5. The welding tool for welding the connecting piece and the core package tab according to claim 2, characterized in that: The tooling base (1) also includes a push rod assembly arranged at the end of the tooling base (1), the push rod assembly including a push bracket (8), a push rod (9) axially movably arranged on the push bracket (8), and a quick clamp (10) for pushing the push rod (9) to move axially, one end of the push rod (9) being fixedly connected to the second push plate (6), and the other end being connected to the output end of the quick clamp (10).

6. The welding tool for welding the connecting piece and the core package tab according to claim 2, characterized in that: The tooling base (1) is provided with a slide groove (11), and a slider (12) adapted to the slide groove (11) is correspondingly provided at the bottom of the first limiting member (5), and the first limiting member (5) is movably arranged on the tooling base (1) via the slider (12) and the slide groove (11).

7. The welding tool for welding the connecting piece and the core package tab according to claim 1, characterized in that: The pole lug of the core package (3) extends into the first installation area (2); and also includes a pressing cover (13) for pressing the pole lug extending into the first installation area (2) downward onto the corresponding connecting piece (4).

8. The welding tool for welding the connecting piece and the core package tab according to claim 7, characterized in that: The gland (13) is also provided with a gripping portion (14) for easy gripping.

9. The welding tool for welding the connecting piece and the core package tab according to claim 7, characterized in that: The gland (13) is also provided with a welding window (15) for the welding head of a welding gun to contact and pass through.

10. The welding tool for welding the connecting piece and the core package tab according to claim 1, characterized in that: The first installation area (2) is provided with an accommodating groove (16) for accommodating the connecting piece (4) and cooperating with the first limiting member (5) to limit and fix the connecting piece (4).

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