Pole piece and pole lug welding device

Abstract

The utility model discloses a pole piece and pole lug welding device which comprises a bearing mechanism and a welding mechanism, the bearing mechanism comprises a base and a bottom die installed on the base, the welding mechanism comprises an installation base, a base, a welding driving unit, a top die base and a top die, the top die is fixed to the top die base, the top die base is connected to the movable end of the welding driving unit, and the welding driving unit is fixed to the installation base. The welding driving unit drives the top die to be close to or away from the bottom die, and a welding position is formed between the top die and the bottom die; the base comprises a fixed table and an adjusting table; the welding driving unit is fixed to the adjusting table, the fixing table is provided with a first long hole extending in the width direction of the pole piece, and the adjusting table is installed on the fixing table through the first long hole and is adjustable in position in the extending direction of the first long hole. The mounting seat is fixed at the movable end of the welding driving unit, a second long hole extending in the length direction of the pole piece is formed in the mounting seat, the top die seat is mounted on the mounting seat through the second long hole, and the position of the top die seat is adjustable in the extending direction of the second long hole. The device can realize the positioning adjustment of the welding position of the pole piece and the pole lug.

Description

Technical Field

[0001] The utility model relates to the field of battery core manufacturing, in particular to a pole piece and tab welding device. Background Art

[0002] During the production of battery cells, the cut tabs need to be welded to the pole pieces at intervals along their length. Only then can the pole pieces with welded tabs be used in the subsequent winding process. Chinese utility model patent application number 202121742216.7 discloses a dust-removing tab welding mechanism, which specifically discloses a frame, a bottom mold assembled on the frame, and a top mold corresponding to the bottom mold. The bottom and top molds cooperate to press-weld the tabs and pole pieces together.

[0003] During the welding process, the welding positions of the tabs and electrode sheets vary for different types of products. Furthermore, because the tabs are smaller, the corresponding top and bottom molds are also smaller. To meet the welding requirements of different battery cell electrode sheet products, the position of the top mold relative to the bottom mold needs to be finely adjusted. In existing technology, the relative position of the top and bottom molds is fixed, making it difficult to quickly and easily adjust the relative position of the two. Utility Model Content

[0004] The purpose of the utility model is to provide a pole piece and pole tab welding device which can realize the positioning and adjustment of the pole piece and pole tab welding position.

[0005] The utility model provides a pole piece and tab welding device, comprising a supporting mechanism and a welding mechanism, the supporting mechanism comprising a base and a bottom mold installed on the base, the welding mechanism comprising a base, a welding drive unit, a top mold base and a top mold, the welding drive unit being installed on the base, the top mold being fixed to the top mold base, the top mold base being connected to the movable end of the welding drive unit, the welding drive unit driving the top mold to approach or move away from the bottom mold, the top mold and the bottom mold being arranged opposite to each other and forming a welding position for welding the pole piece and the pole tab therebetween; the welding mechanism also comprises a mounting seat, the base comprising a fixed platform and an adjusting platform; the welding drive unit is fixed to the adjusting platform, the fixed platform is provided with a first long hole extending along the width direction of the pole piece, the adjusting platform is installed on the fixed platform through the first long hole, and the position of the adjusting platform is adjustable relative to the fixed platform along the extension direction of the first long hole; the mounting seat is fixed to the movable end of the welding drive unit, the mounting seat is provided with a second long hole extending along the length direction of the pole piece, the top mold base is installed on the mounting seat through the second long hole, and the position of the top mold base is adjustable relative to the mounting seat along the extension direction of the second long hole.

[0006] It can be seen from the above scheme that the present application splits the base for fixing the welding drive unit and the base for fixing the top mold into a fixed table and an adjustment table as well as a mounting seat and a top mold seat, and sets a first long hole and a second long hole in two vertical directions along the width direction and the length direction of the pole piece, so that the top mold can change the welding position in the plane direction of the pole piece relative to the bottom mold to better adapt to production needs.

[0007] A preferred solution is that the welding mechanism also includes a first adjusting member, which is screwed to the adjusting platform along the width direction, and the fixed platform limits the movement of the first adjusting member along the width direction, and the first adjusting member drives the adjusting platform when it rotates around its own axis; and / or, the welding mechanism also includes a second adjusting member, which is screwed to the top mold base along the length direction, and the mounting base limits the movement of the second adjusting member along the length direction, and the second adjusting member drives the top mold base when it rotates around its own axis.

[0008] It can be seen that by rotating the first adjusting member or the second adjusting member, the relative position of the adjusting table and the fixed table and the relative position of the mounting seat and the top mold seat can be adjusted. Compared with manual adjustment, the adjusting member can achieve finer and more accurate welding position adjustment.

[0009] A further solution is that the welding mechanism also includes a limiting part, which is adjustably mounted on the mounting seat along the moving direction of the top mold. The limiting part is located between the mounting seat and the fixed platform, and the limiting part limits the fixed platform from the moving direction of the top mold.

[0010] It can be seen from this that the limit part can limit the distance between the mounting seat and the fixed platform to be greater than a certain length, so that the length of the relative movement of the top mold and the bottom mold is limited to a range, thereby controlling the welding frequency when the welding drive unit drives the top mold to move for welding, and better matching the transmission speed of the electrode.

[0011] A further solution is that the supporting mechanism also includes a first roller and a second roller, the first roller and the second roller are arranged at intervals and their axes are parallel, and in the length direction, the bottom mold is located between the first roller and the second roller; the base is provided with a third long hole and a fourth long hole extending along the moving direction of the top mold, the first roller is mounted on the base through the third long hole and its position is adjustable relative to the base along the extension direction of the third long hole, and the second roller is mounted on the base through the fourth long hole and its position is adjustable relative to the base along the extension direction of the fourth long hole.

[0012] It can be seen that the first roller and the second roller can be used to receive the passing pole piece. The surface of the bottom mold will become uneven or have burrs after a long period of automatic welding process. The receiving surface of the bottom mold needs to be polished for reuse. The height of the bottom mold will be reduced after polishing. The height of the first roller and the second roller in the prior art cannot be changed. When the top mold is matched with the polished bottom mold, the downward pressure distance of the pole piece relative to the first roller and the second roller will be longer, which will cause unstable welding quality. The first roller and the second roller of the present application can adjust the height through the third long hole and the fourth long hole, so that the relative position of the first roller and the second roller and the receiving surface of the bottom mold is fixed to ensure the quality of welding.

[0013] A further solution is that the base is provided with at least two installation positions along the length direction, the bottom mold includes at least two supporting surfaces arranged along the length direction, and the bottom mold can be selectively installed in different installation positions to replace the supporting surface opposite to the top mold.

[0014] It can be seen that after a long period of welding support, the supporting surface of the bottom mold is damaged and needs to be changed to change the supporting surface corresponding to the top mold. The bottom mold of the prior art cannot adjust the installation position in the length direction of the pole piece, and the space of the bottom mold in the length direction is wasted. The present application can change the installation position of the bottom mold along the length direction, so that the bottom mold can choose different supporting surfaces in the length direction to match the top mold, and make full use of the supporting space in the length direction of the bottom mold.

[0015] A further solution is that each mounting position is provided with a corresponding set of first mounting hole groups, and each supporting surface includes at least two supporting areas arranged in sequence along the width direction; the bottom mold is rotated along the normal direction of the pole piece through the first mounting hole group to change the orientation and replace the supporting area opposite to the top mold; and / or, the bottom mold can be adjusted in the width direction through the first mounting hole group to replace the supporting area opposite to the top mold.

[0016] It can be seen that each supporting surface of the bottom mold is provided with at least two supporting areas in the width direction. The bottom mold can change the supporting area corresponding to the top mold by rotating along the normal direction of the pole piece or moving along the width direction, thereby making full use of the supporting space in the width direction of the bottom mold.

[0017] A further solution is that the bottom mold is in the shape of a regular quadrangular prism, and the bottom mold is provided with supporting surfaces on two opposite sides along the length direction of each side surface.

[0018] It can be seen that each side surface of the bottom mold is provided with two opposite supporting surfaces along the length direction. By flipping the bottom mold, the supporting surfaces of each side of the bottom mold can be utilized to achieve full utilization of the bottom mold.

[0019] A further solution is that the first mounting hole group includes a first mounting hole and a second mounting hole arranged along the width direction; a second mounting hole group is provided on each side of the bottom mold, and the second mounting hole group includes a third mounting hole and a fourth mounting hole arranged along the width direction; the spacing between the first mounting hole and the second mounting hole is equal to the spacing between the third mounting hole and the fourth mounting hole; when the bottom mold is installed to the installation position along the first direction, the first mounting hole cooperates with the third mounting hole, and the second mounting hole cooperates with the fourth mounting hole; when the bottom mold is installed to the installation position along the second direction opposite to the first direction, the first mounting hole cooperates with the fourth mounting hole, and the second mounting hole cooperates with the third mounting hole.

[0020] It can be seen that the spacing between the first mounting hole and the second mounting hole on the base is equal to the spacing between the third mounting hole and the fourth mounting hole on each side of the bottom mold. The bottom mold can not only be flipped along the axis in the width direction of the pole piece to adjust the installation position, but also can be rotated 180 degrees along the normal direction of the pole piece to change the installation position. One bottom mold can contain 16 supporting areas corresponding to the top mold, which greatly reduces the cost of using the bottom mold. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention is further described with reference to the accompanying drawings. However, the embodiments in the accompanying drawings do not constitute any limitation to the present invention. A person skilled in the art can obtain other drawings based on the following drawings without creative effort.

[0022] Figure 1 It is a structural diagram of an embodiment of the utility model from the first perspective.

[0023] Figure 2 It is a structural diagram of the second viewing angle of an embodiment of the utility model.

[0024] Figure 3 It is a structural diagram of the base and bottom mold of an embodiment of the utility model.

[0025] Figure 4 It is a structural diagram of the base of an embodiment of the present utility model.

[0026] Figure 5 It is a structural diagram of the top mold and the bottom mold of an embodiment of the utility model. DETAILED DESCRIPTION

[0027] The following is a clear and complete description of the technical solution of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0028] This embodiment provides a pole piece and tab welding device, such as Figures 1 to 5 As shown, it includes a supporting mechanism located below and a welding mechanism located above, wherein the supporting mechanism includes a base 11 and a bottom mold 12 installed on the base 11, and the welding mechanism includes a base 21, a welding drive unit 22, a mounting seat 23, a top mold base 24 and a top mold 25, wherein the base 21 includes a fixed platform 211 and an adjustment platform 212. The welding drive unit 22 is a cylinder, whose fixed part is fixed to the adjustment platform 212, and the movable end extends downward and is fixed with a mounting seat 23, as well as a top mold base 24 and a top mold 25 connected to the mounting seat 23. The welding drive unit 22 can drive the top mold 25 at its movable end to move closer to or away from the bottom mold 12. The top mold 25 and the bottom mold 12 are arranged relative to each other and form a welding position for welding the tab and the pole piece. The pole piece strip passes through the position between the top mold 25 and the bottom mold 12, and the tab extends into this welding position from the width direction of the pole piece. The top mold 25 and the bottom mold 12 can press-weld the tab and the pole piece.

[0029] The fixing platform 211 is fixedly arranged and is provided with two first elongated holes 2111 extending along the width direction of the electrode piece. The adjusting platform 212 has fixed circular holes corresponding to the first elongated holes 2111, and the two are screwed together. The adjusting platform 212 can be fixed at different positions along the extension direction of the first elongated holes 2111 to change the position of the welding drive unit 22 in the width direction of the electrode piece, thereby changing the relative position of the top mold 25 and the bottom mold 12 in the width direction of the electrode piece. The top mold 25 is fixed to the top mold base 24. The mounting base 23 is provided with four second elongated holes 231 extending along the length direction of the electrode piece. The top mold base 24 is also provided with a corresponding fixed circular hole for each second elongated hole 231 and is screwed together with four screws. The top mold base 24 can be fixed at different positions along the extension direction of the second elongated holes 231 to change the position of the top mold 25 in the length direction of the electrode piece, thereby changing the relative position of the top mold 25 and the bottom mold 12 in the width direction of the electrode piece.

[0030] The welding mechanism in this embodiment further includes a first adjusting member 261 and a second adjusting member 262. Figure 1As shown, the first adjusting member 261 is a threaded column with its thread axis parallel to the width direction of the pole piece and its first end threadedly connected to the adjusting platform 212. A slot 263 is provided on one side of the fixed platform 211. The second end of the first adjusting member 261 is clamped in the slot 263 and is restricted in movement in the width direction of the pole piece. When the second end of the first adjusting member 261 is turned, its first end moves relative to the adjusting platform 212 and can drive the adjusting platform 212 to move in the width direction of the pole piece relative to the fixed platform 211. The second adjusting member 262 is also a threaded column with its thread axis parallel to the length direction of the pole piece. One end is threadedly connected to the top mold base 24, and the other end is restricted in the slot 263 on the mounting base 23. The adjustment method is consistent with that of the first adjusting member 261 and will not be described in detail here.

[0031] The welding mechanism of this embodiment also includes two limiting portions 27. The limiting portions 27 are threadedly connected to the mounting seat 23 and are adjustable in position along the moving direction of the top mold 25. The limiting portions 27 are located between the mounting seat 23 and the fixed platform 211. When the welding drive cylinder retracts upward, the limiting portions 27 will abut against the fixed platform 211, thereby limiting the minimum distance between the mounting seat 23 and the fixed platform 211. In addition, the welding mechanism of this embodiment also includes two guide mechanisms 28, which guide the top mold 25 to approach the bottom mold 12 along the guide direction. A plurality of elliptical avoidance positions 2112 are also provided on the fixed platform 211 to prevent interference between the guide mechanisms 28 and the movable end of the welding drive cylinder when the adjustment platform 212 is adjusted on the fixed platform 211.

[0032] like Figure 1 and Figure 2 As shown, the supporting mechanism also includes a first roller 111 and a second roller 112 disposed on the base 11. The first roller 111 and the second roller 112 are spaced apart and their rotation axes are parallel to the width direction of the pole piece. In the length direction of the pole piece, the bottom mold 12 is located between the first roller 111 and the second roller 112. During welding, the pole piece moves above the first roller 111 and the second roller 112. The base 11 is provided with a third long hole 113 and a fourth long hole 114 extending along the movement direction of the top mold 25. The third long hole 113 and the fourth long hole 114 each include two. The two ends of the first roller 111 are respectively fixed to the two third long holes 113, and the two ends of the second roller 112 are respectively fixed to the two fourth long holes 114. The connection method is similar to that of the fixing platform 211 and the connecting platform. The first roller 111 and the second roller 112 can be adjusted in the movement direction of the top mold 25 through the third long hole 113 and the fourth long hole 114.

[0033] like Figure 3As shown, the bottom mold 12 of a pole piece and tab welding device provided in this embodiment is in the shape of a regular quadrangular prism. The bottom mold 12 includes two square-shaped surfaces located on opposite sides of the pole piece width direction and four rectangular side surfaces 121 extending along the pole piece width direction. Each side surface 121 is provided with supporting surfaces 122 on opposite sides of the pole piece length direction. The length of each supporting surface 122 in the pole piece width direction exceeds twice that of the top mold 25. Each supporting surface 122 includes two supporting areas 1221 arranged in sequence along the pole piece width direction. Each supporting area 1221 can be used to cooperate with the top mold 25 to press-weld the pole piece and the tab. Therefore, each side surface 121 of the bottom mold 12 under this embodiment is provided with four supporting areas 1221, and the four side surfaces 121 of the bottom mold 12 have a total of sixteen supporting areas 1221.

[0034] In this embodiment, the base 11 is provided with two groups of first mounting holes 115 along the length direction of the pole piece, and each group of first mounting holes 115 includes a first mounting hole 1151 and a second mounting hole 1152 arranged along the width direction of the pole piece. As shown in the figure, there are two first mounting holes 1151 and two second mounting holes 1152 on the base 11, forming a rectangular array. The bottom mold 12 is provided with a third mounting hole 123 and a fourth mounting hole 124 arranged along the width direction of the pole piece between the two supporting surfaces 122 of each side surface 121. The entire bottom mold 12 has a total of four third mounting holes 123 and four fourth mounting holes 124. The spacing between the third mounting hole 123 and the fourth mounting hole 124 on each side surface 121 is equal to the spacing between the first mounting hole 1151 and the second mounting hole 1152 of each first mounting hole group 115.

[0035] Since the top mold 25 is only fine-tuned within a relatively small range, the position of the top mold 25 is relatively fixed, and the installation position of the bottom mold 12 on the base 11 can be adjusted to change the cooperation between the top mold 25 and different supporting areas 1221. The installation method of the bottom mold 12 on the first mounting hole group 115 of the base 11 can be as follows: first, the bottom mold 12 is selectively installed in one of the first mounting hole groups 115 of the base 11, and the first mounting hole 1151 cooperates with the third mounting hole 123, and the second mounting hole 1152 cooperates with the fourth mounting hole 124. The bottom mold 12 can be flipped 90° along an axis parallel to the width direction of the pole piece and fixed to the first mounting hole group 115. Repeat the steps of flipping 90° and fixing several times, so that a supporting area 1221 at the same position on each of the four side surfaces 121 of the bottom mold 12 is located under the top mold 25 and cooperates with the top mold 25.

[0036] Second, the bottom mold 12 is selectively installed in another group of first mounting hole groups 115 in the base 11, and the first mounting hole 1151 of the first mounting hole group 115 cooperates with the third mounting hole 123, and the second mounting hole 1152 cooperates with the fourth mounting hole 124. Similarly, the bottom mold 12 can be flipped 90° along an axis parallel to the width direction of the pole piece above the first mounting hole group 115 and fixed to the first mounting hole group 115. Repeat the steps of flipping 90° and fixing several times to make the second supporting area 1221 at the same position of each side 121 of the four side surfaces 121 of the bottom mold 12 be under the top mold 25 and cooperate with the top mold 25.

[0037] Third, since the spacing between the first mounting hole 1151 and the second mounting hole 1152 is equal to the spacing between the third mounting hole 123 and the fourth mounting hole 124, the bottom mold 12 can be rotated 180° with the axis parallel to the normal direction of the pole piece as the axis to change the orientation of the bottom mold 12 and then installed. Any group of first mounting hole groups 115 can be selected for installation and matching, so that the first mounting hole 1151 matches with the fourth mounting hole 124, and the second mounting hole 1152 matches with the third mounting hole 123. Similarly, the bottom mold 12 can be flipped 90° along the axis parallel to the width direction of the pole piece above the first mounting hole group 115 and fixed to the first mounting hole group 115. The steps of flipping 90° and fixing are repeated several times. In this way, the third and fourth supporting areas 1221 at the same position of each side 121 of the four side surfaces 121 of the bottom mold 12 can be placed under the top mold 25 and matched with the top mold 25.

[0038] By adjusting the above installation method, the sixteen supporting areas 1221 on the four sides 121 of the bottom mold 12 in this embodiment can be adjusted to positions corresponding to the top mold 25. Compared with the existing technology, the utilization efficiency of the bottom mold 12 is doubled.

[0039] The above embodiment merely represents one embodiment of the present invention. While the description is relatively specific and detailed, it should not be construed as limiting the scope of the utility model patent. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present utility model patent shall be based on the appended claims.

Claims

1. A pole piece and tab welding device, comprising a supporting mechanism and a welding mechanism, wherein the supporting mechanism comprises a base and a bottom mold mounted on the base, the welding mechanism comprises a base, a welding drive unit, a top mold base and a top mold, the welding drive unit being mounted on the base, the top mold being fixed to the top mold base, the top mold base being connected to a movable end of the welding drive unit, the welding drive unit driving the top mold to move toward or away from the bottom mold, the top mold and the bottom mold being arranged opposite to each other and forming a welding position for welding the pole piece and the tab therebetween; It is characterized in that The welding mechanism further comprises a mounting base, and the base comprises a fixing platform and an adjusting platform; The welding drive unit is fixed to the adjustment platform, the fixing platform is provided with a first long hole extending along the width direction of the pole piece, the adjustment platform is mounted on the fixing platform through the first long hole, and the position of the adjustment platform relative to the fixing platform along the extension direction of the first long hole is adjustable; The mounting base is fixed to the movable end of the welding drive unit, and the mounting base is provided with a second long hole extending along the length direction of the pole piece. The top mold base is mounted on the mounting base through the second long hole, and the position of the top mold base relative to the mounting base along the extension direction of the second long hole is adjustable.

2. The electrode piece and tab welding device according to claim 1, characterized in that: The welding mechanism further includes a first adjusting member, the first adjusting member being screwed to the adjusting platform along the width direction, the fixing platform restricting the first adjusting member from moving along the width direction, and the first adjusting member driving the adjusting platform when rotating around its own axis; and / or, The welding mechanism also includes a second adjusting member, which is screwed to the top mold base along the length direction. The mounting seat limits the movement of the second adjusting member along the length direction. When the second adjusting member rotates around its own axis, it drives the top mold base.

3. The electrode tab welding device according to claim 1, characterized in that: The welding mechanism also includes a limiting portion, which is adjustably mounted on the mounting seat along the moving direction of the top mold. The limiting portion is located between the mounting seat and the fixed platform, and the limiting portion limits the fixed platform from the moving direction of the top mold.

4. The electrode tab welding device according to claim 1, characterized in that: The supporting mechanism further includes a first roller and a second roller, the first roller and the second roller are spaced apart and their axes are parallel, and in the length direction, the bottom mold is located between the first roller and the second roller; The base is provided with a third long hole and a fourth long hole extending along the moving direction of the top mold. The first roller is mounted on the base through the third long hole and is positionally adjustable relative to the base along the extending direction of the third long hole. The second roller is mounted on the base through the fourth long hole and is positionally adjustable relative to the base along the extending direction of the fourth long hole.

5. The electrode piece and tab welding device according to any one of claims 1 to 4, characterized in that: The base is provided with at least two installation positions along the length direction, and the bottom mold includes at least two supporting surfaces provided along the length direction. The bottom mold can be selectively installed at different installation positions to replace the supporting surface opposite to the top mold.

6. The electrode piece and tab welding device according to claim 5, characterized in that: Each of the mounting positions is provided with a corresponding set of first mounting holes, and each of the supporting surfaces includes at least two supporting areas sequentially arranged along the width direction; The bottom mold is rotated along the normal direction of the pole piece through the first mounting hole group to change the orientation and replace the supporting area opposite to the top mold; and / or, The bottom mold can be adjusted in position in the width direction through the first mounting hole group to replace the supporting area opposite to the top mold.

7. The electrode piece and tab welding device according to claim 6, characterized in that: The bottom mold is in the shape of a regular quadrangular prism, and the bottom mold is provided with supporting surfaces on two opposite sides along the length direction of each side surface.

8. The electrode piece and tab welding device according to claim 7, characterized in that: The first mounting hole group includes a first mounting hole and a second mounting hole arranged along the width direction; A second mounting hole group is provided on each side surface of the bottom mold, and the second mounting hole group includes a third mounting hole and a fourth mounting hole arranged along the width direction; The distance between the first mounting hole and the second mounting hole is equal to the distance between the third mounting hole and the fourth mounting hole; When the bottom mold is installed to the installation position along the first orientation, the first installation hole cooperates with the third installation hole, and the second installation hole cooperates with the fourth installation hole; When the bottom mold is installed to the installation position along a second orientation opposite to the first orientation, the first installation hole cooperates with the fourth installation hole, and the second installation hole cooperates with the third installation hole.

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