Lithium ion battery tab laser welding pressing device

Abstract

According to the lithium ion battery pole lug laser welding pressing device, in the device, a supporting plate comprises a horizontal supporting surface and two side walls vertically extending upwards from the two sides of the supporting surface; the battery cell is supported on the supporting surface and is positioned on the inner side of the side wall, and the battery cell is provided with a bendable tab; the adapter plate is arranged on the outer side of the side wall, and the tab is bent and attached to the outer side of the adapter plate; the pressing sheet is attached to the tab from the outer side, and the pressing sheet is provided with a clearance hole aligned with a pre-welding print of the tab; the cover plate covers one end of the supporting plate; the rubber band is elastically connected with the pressing sheet, the battery cell and the supporting plate. The device is adjustable in pressure and compatible with different sizes, and the battery cell can move freely after being pressed.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium ion battery manufacturing, in particular to a lithium ion battery tab laser welding and pressing device. Background Art

[0002] During the manufacturing process of lithium-ion batteries, laser welding is required to weld the tabs and adapters. During the welding process, the tabs and adapters need to be pressed together to eliminate the gap to ensure the quality of laser welding. Currently, the pressing of tabs and adapters is mainly achieved by using a cylinder with a specific tooling to provide external pressing force. The device is large in size, high in cost, and not suitable for frequent model changes.

[0003] In the prior art, after the battery cell is positioned to the welding position, the tab is bent, and the tab is pressed by the cylinder and the press nozzle before laser welding. During the cylinder pressing, the size structure and welding position of the battery cell need to be fixed, and the pressing force is provided by the external cylinder. After pressing, the battery cell cannot be moved. The device is complex, large in size and high in cost. If the model needs to be changed, it must be achieved by adjusting the mechanical structure and replacing the tooling.

[0004] The above information disclosed in the background technology section is only used to enhance the understanding of the background of the present invention and therefore may contain information that does not constitute the prior art known to ordinary technicians in this field. Utility Model Content

[0005] The utility model aims to provide a lithium-ion battery tab laser welding clamping device, which is used for rapid type change during tab laser welding, is simple and convenient to operate, is suitable for different models, and can solve the problems of complex device, high cost, and need for debugging when changing types in the prior art.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] The utility model discloses a lithium-ion battery tab laser welding and pressing device, comprising:

[0008] A support plate comprising a horizontal support surface and two side walls extending vertically upward from both sides of the support surface;

[0009] A battery core, which is supported on the supporting surface and located inside the side wall, and has a bendable tab;

[0010] A transfer plate, which is arranged on the outside of the side wall, and the tab is bent and attached to the outside of the transfer plate;

[0011] A pressing sheet, which fits the pole ear from the outside, and the pressing sheet is provided with a hole for avoiding air flow to align with the pre-welding mark of the pole ear;

[0012] A cover plate, which covers one end of the support plate;

[0013] The rubber band elastically connects the pressing sheet, the battery cell and the supporting plate.

[0014] In the lithium-ion battery tab laser welding and clamping device, the end of the cover plate extends vertically to form a transition piece that fits the outer side of the side wall.

[0015] In the lithium-ion battery tab laser welding and clamping device, the support plate and the battery core are detachable.

[0016] In the lithium-ion battery tab laser welding and clamping device, the height of the bottom end of the tab is higher than the height of the side wall in the vertical direction.

[0017] In the lithium-ion battery tab laser welding and clamping device, the support plate is a C-shaped support plate for accommodating one battery cell or an I-shaped support plate for accommodating two battery cells.

[0018] In the lithium-ion battery tab laser welding clamping device, the support plate is 200mm to 400mm long, 80mm to 120mm wide, 10mm to 30mm high, and 2mm thick. The battery cell is less than 400mm long and less than 120mm wide. The tab is the same width as the battery cell or less than the width of the battery cell.

[0019] In the lithium-ion battery tab laser welding and clamping device, the pre-welding weld mark size of the tab is (30-120) mm*(5-10) mm, the clamping plate size is (30-120) mm*(7-20) mm, and the air avoidance hole size is (30-120) mm*(5-10) mm.

[0020] In the lithium-ion battery tab laser welding and clamping device, the circumference of the rubber band ring is 200 mm to 530 mm, and the diameter of the rubber band is 2 mm to 8 mm.

[0021] In the lithium-ion battery tab laser welding and clamping device, the cover plate is a vertical flat plate structure.

[0022] In the lithium-ion battery tab laser welding and clamping device, the lithium-ion battery tab laser welding and clamping device is a symmetrical structure.

[0023] In the above technical scheme, a lithium-ion battery tab laser welding clamping device provided by the utility model has the following beneficial effects: the pressure of the utility model is adjustable and compatible with different sizes. The battery cell can move freely after clamping, and the support plate, clamping sheet and elastic rubber band ring provide a clamping effect with adjustable position and force. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present utility model. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0025] Figure 1 A schematic diagram of the exploded structure of a lithium-ion battery tab laser welding clamping device provided in an embodiment of the utility model.

[0026] Figure 2 A schematic diagram of the assembled structure of a lithium-ion battery tab laser welding clamping device provided in an embodiment of the utility model. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the implementation of the utility model clearer, the technical solution in the implementation of the utility model will be clearly and completely described below in conjunction with the drawings in the implementation of the utility model. Obviously, the described implementation is a part of the implementation of the utility model, not all of the implementations. Based on the implementation of the utility model, all other implementations obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present invention.

[0029] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0030] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0031] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0032] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0034] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0035] See also Figure 1-2 As shown, in one embodiment, a lithium-ion battery tab laser welding and clamping device of the utility model comprises:

[0036] A support plate 1, comprising a horizontal support surface and two side walls extending vertically upward from both sides of the support surface;

[0037] A battery cell 2, which is supported on the supporting surface and located inside the side wall, and the battery cell 2 has a bendable pole ear 3;

[0038] A transfer plate 4 is provided on the outer side of the side wall, and the tab 3 is bent and attached to the outer side of the transfer plate 4;

[0039] A pressing sheet 5, which is attached to the pole lug 3 from the outside, and the pressing sheet 5 is provided with a hole for avoiding air flow to align with the pre-welding mark of the pole lug 3;

[0040] A cover plate 6, which covers one end of the support plate 1;

[0041] The rubber band 7 elastically connects the pressing sheet 5 , the battery core 2 and the support plate 1 .

[0042] In a preferred embodiment of the laser welding and clamping device for a lithium-ion battery tab, the end of the cover plate 6 extends vertically to form a transfer plate 4 that fits the outer side of the side wall.

[0043] In a preferred embodiment of the lithium-ion battery tab laser welding and clamping device, the support plate 1 and the battery cell 2 are detachable.

[0044] In a preferred embodiment of the lithium-ion battery tab laser welding and clamping device, the height of the bottom end of the tab 3 is higher than the height of the side wall in the vertical direction.

[0045] In a preferred embodiment of the lithium-ion battery tab laser welding and clamping device, the support plate 1 is a C-shaped support plate 1 that accommodates two battery cells 2 .

[0046] In a preferred embodiment of the lithium-ion battery tab laser welding clamping device, the support plate 1 is 400 mm long, 90 mm wide, 11 mm high, and 2 mm thick; the battery cell 2 is less than 400 mm long and 93 mm wide; the tab 3 and the battery cell 2 have the same width of 93 mm.

[0047] In a preferred embodiment of the laser welding and clamping device for a lithium-ion battery tab, the pre-welding weld mark size of the tab 3 is 55mm*7mm, the clamping plate 5 is 70mm*10mm*2mm, the air avoidance hole is 50mm*5mm, and the adapter plate 4 is 80mm*9mm*1.5mm.

[0048] In a preferred embodiment of the lithium-ion battery tab laser welding clamping device, the circumference of the rubber band 7 is 530 mm, and the diameter of the rubber band 7 is 5 mm.

[0049] In a preferred embodiment of the lithium-ion battery tab laser welding and clamping device, the cover plate 6 is a vertical flat plate structure.

[0050] In a preferred embodiment of the lithium-ion battery tab laser welding and clamping device, the lithium-ion battery tab laser welding and clamping device is a symmetrical structure.

[0051] In one embodiment, a lithium-ion battery tab laser welding clamping device includes a support plate 1, a battery cell 2, a tab 3, an adapter plate 4, two clamping plates 5, a cover plate 6, and two rubber bands 7, wherein the cover plate 6 is placed above the support plate 1, so that the adapter plate 4 is placed on the outside of the support plate 1; the battery cell 2 is placed on the inside of the support plate 1; the tab 3 of the battery cell is bent around the support plate 1 and the adapter plate 4, and is pressed against the adapter plate 4; the clamping plate 5 has an avoidance hole corresponding to the welding mark position, is placed on the outside of the tab and is pressed against it; the rubber band 7 avoids the avoidance hole of the clamping plate, wraps around the clamping plate and the support plate, and wraps around each end of the clamping plate once, for a total of two weeks.

[0052] In one embodiment, the C-shaped support plate 1 is longer than the battery cell 2, smaller than the battery cell 2, larger than the clamping plate 5, and smaller than the tab 3; the C-shaped support plate 1 is laid flat, and the cover plate 6 is placed on one side of the C-shaped support plate so that the adapter plate 4 at one end is pressed against the C-shaped support plate 1 from the outside. The battery cell 2 is placed in the C-shaped support plate 1, and the tab 3 is bent and pressed against the adapter plate 4 from the outside; the clamping plate 5 is taken out, pressed against the tab 3 from the outside, and the air-avoiding hole of the clamping plate is facing the pre-welding mark of the tab; the rubber band 7 is taken out and wrapped around the assembled C-shaped support plate 1, the battery cell 2, and the clamping plate 5 for one circle, for a total of two circles; the position of the rubber band 7 is adjusted so that it is pressed against both ends of the clamping plate 5 and avoids the air-avoiding hole of the clamping plate 5; the tab 3 is laser welded through the air-avoiding hole of the clamping plate 5 so that the tab 3 is welded together with the adapter plate 4; the rubber bands 7 are disassembled in sequence. Remove the rubber band 7 and the clamping sheet 5, and pull out the C-shaped support plate 1 from the bottom of the battery cell 2. The welding is completed. When the length of the C-shaped support plate 1 is adapted, both ends are welded at the same time. After the other end symmetrically presses the support plate 1, the adapter plate 4, the pole ear 3, and the clamping sheet 5 together, and fixes them with the rubber band 7, both sides can be welded at the same time; when the length of the C-shaped support plate 1 is much larger than that of the battery cell 2, the adapter plate 4 on the other side may not be pressed against the C-shaped support plate 1, and the pole ear 3 and the clamping sheet 5 are not pressed together, and only one side of the clamping end is welded, and one-side welding is performed. The clamping force can be adjusted by adjusting the length of the rubber band 7. In one embodiment, the support plate 1 is 400mm long, 90mm wide, 11mm high, and 2mm thick; the main body of the battery cell 2 is 285mm long, and the main body length can be less than 400mm, and the width is 93mm. The pole ear 3 is the same width as the battery cell 2, 93mm, and the pole ear 3 contains an ultrasonic welding pre-welding mark of 55mm*7mm; the clamping plate 5 has a size of 70mm*10mm*2mm, and the welding avoidance hole has a size of 50mm*5mm; the spacing between the adapter plates 4 on both sides of the cover plate 6 is 290mm, and the size of the adapter plate 4 is 80mm*9mm*1.5mm; the circumference of the rubber band 7 is 530mm, and the diameter of the rubber band 7 is 5mm. Lay the C-shaped support plate 1 flat, and place the cover plate 6 on the long side of the C-shaped support plate 1, so that one side of the adapter plate 4 is close to the C-shaped support plate 1 from the outside, and the other side is inside the support plate 1; put the battery cell 2 into the C-shaped support plate 1 and between the adapter plate 4 of the cover plate 6, bend the pole ear 3, so that the pole ear 3 is close to the adapter plate 4 from the outside; take the clamping plate 5, bend the pole ear 3 from the outside, and make the air-avoiding hole of the clamping plate 5 face the pre-welding mark of the pole ear 3; take two rubber bands 7, wrap them around the assembled C-shaped support plate 1, the battery cell 2, and the clamping plate 5, for a total of two circles; adjust the position of the rubber band 7 so that it is pressed on both ends of the clamping plate 5 and avoids the air-avoiding hole of the clamping plate 5; put the above-mentioned battery cell 2 after clamping into the laser welding station, and perform laser welding of the pole ear 3 through the air-avoiding hole of the clamping plate 5, so that the pole ear 3 and the adapter plate 4 are welded together, and the welding size is 45mm*3mm;

[0053] Take out the welded battery cell 2, remove the rubber band 7 and the clamping plate 5 in turn, and pull out the C-shaped support plate 1 from under the battery cell 2. After welding on one side, weld the tab 3 and the adapter 4 on the other side.

[0054] In one embodiment, the C-shaped support plate 1 is 290mm long, 90mm wide, 11mm high, and 2mm thick; the main body of the battery cell 2 is 285mm long and 93mm wide, the tab 3 is 93mm the same width as the battery cell 2, and the tab 3 contains an ultrasonic welding pre-welding mark of 55mm*7mm; the clamping plate 5 is 70mm*10mm*2mm in size, and the welding avoidance hole is 50mm*5mm in size; the spacing between the adapter plates 4 on both sides of the cover plate 6 is 290mm, and the size of the adapter plates 4 is 80mm*9mm*1.5mm; the circumference of the rubber band 7 is 385mm, and the diameter of the rubber band 7 is 5mm. Lay the C-shaped support plate 1 flat, place the cover plate 6 on the long side of the C-shaped support plate 1, so that the adapter plates 4 on both sides are close to the C-shaped support plate 1 from the outside; put the battery cell 2 into the C-shaped support plate 1 and between the cover plate 6 and the adapter plates 4, bend the pole ears 3 on both sides, so that the pole ears 3 are close to the adapter plates 4 from the outside of both sides; take two pressing plates 5, bend the pole ears 3 from the outside of both sides, and make the pressing plates 5 avoid the air holes and pre-weld the welding marks on the pole ears 3; take two rubber bands 7, wrap them around the assembled C-shaped support plate 1 and the battery cell 2 , one circle of the clamping sheet 5, two circles in total; adjust the position of the rubber band 7 to press on both ends of the clamping sheet 5 and avoid the air-avoiding holes of the clamping sheet 5; put the above-mentioned battery cell 2 with both sides clamped into the laser welding station, and perform laser welding on the tabs 3 through the air-avoiding holes of the clamping sheet 5, so that the tabs 3 and the adapter sheet 4 are welded together, with a welding size of 45mm*3mm, take out the welded battery cell 2, remove the rubber band 7 and the clamping sheet 5 in turn, and pull out the C-shaped support plate 1 from under the battery cell 2, and the welding is completed.

[0055] Finally, it should be noted that the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making any creative work are within the scope of protection of the present application.

[0056] The above only describes some exemplary embodiments of the present invention by way of illustration. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A lithium-ion battery tab laser welding clamping device, characterized in that: These include, A support plate comprising a horizontal support surface and two side walls extending vertically upward from both sides of the support surface; A battery core, which is supported on the supporting surface and located inside the side wall, and has a bendable tab; A transfer plate, which is arranged on the outside of the side wall, and the tab is bent and attached to the outside of the transfer plate; A pressing sheet, which fits the pole ear from the outside, and the pressing sheet is provided with a hole for avoiding air flow to align with the pre-welding mark of the pole ear; A cover plate, which covers one end of the support plate; The rubber band elastically connects the pressing sheet, the battery cell and the supporting plate.

2. A lithium-ion battery tab laser welding and clamping device according to claim 1, characterized in that: The end of the cover plate extends vertically to form a transfer sheet that fits the outer side of the side wall.

3. A lithium-ion battery tab laser welding and clamping device according to claim 1, characterized in that: The support plate and the battery core are detachable.

4. The lithium-ion battery tab laser welding and clamping device according to claim 1, characterized in that: The height of the bottom end of the pole ear is higher than the height of the side wall in the vertical direction.

5. The lithium-ion battery tab laser welding and clamping device according to claim 1, characterized in that: The support plate is a C-shaped support plate for accommodating one battery cell or an I-shaped support plate for accommodating two battery cells.

6. The lithium-ion battery tab laser welding and clamping device according to claim 1, characterized in that: The support plate is 200mm to 400mm long, 80mm to 120mm wide, 10mm to 30mm high, and 2mm thick. The length of the battery cell is less than 400mm, the width is less than 120mm, and the tab is the same width as the battery cell or less than the width of the battery cell.

7. A lithium-ion battery tab laser welding and clamping device according to claim 6, characterized in that: The pre-weld stamp size of the tab is 30-120mm*5-10mm, the clamping plate size is 30-120mm*7-20mm, and the air avoidance hole size is 30-120mm*5-10mm.

8. The lithium-ion battery tab laser welding and clamping device according to claim 7, characterized in that: The circumference of the rubber band is 200mm to 530mm, and the diameter of the rubber band is 2mm to 8mm.

9. The lithium-ion battery tab laser welding and clamping device according to claim 1, characterized in that: The cover plate is a vertical flat plate structure.

10. The lithium-ion battery tab laser welding and clamping device according to claim 1, characterized in that: The lithium-ion battery tab laser welding and clamping device is a symmetrical structure.

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