Laser welding tool and single battery

Abstract

The utility model discloses a laser welding tool which comprises a supporting seat and a shaping plate, and at least one end, in the first direction, of the supporting seat is connected with the shaping plate. The supporting seat is used for supporting the shaping plate so as to prevent the pin from being bent when the head of the tab and the first connecting part of the pin are welded; wherein the shaping plate extends along the first direction, and the shaping plate is configured between the first connecting part of the pin and the first end surface of the lead-out tab in the battery cell. According to the battery monomer disclosed by the utility model, by using the laser welding tool, the pins can be prevented from being bent when the tabs press the pins for laser welding.

Description

Technical Field

[0001] The utility model relates to the technical field of battery manufacturing, in particular to a laser welding tooling and a battery cell applying the laser welding tooling. Background Art

[0002] In a blade battery, when the thickness is relatively thick, a JR (Jellyroll, bare battery cell) usually uses a wound core. However, due to the limitation of the length of the winding needle, the tab direction usually faces upward. In order to save the height space of the battery, the tab needs to be electrically connected to the terminal through a pin. When the pin is welded to the tab, the pin is easily bent, affecting the stability of the internal structure of the battery and increasing the risk of internal short circuit of the battery. Content of the Utility Model

[0003] In view of this, the utility model provides a laser welding tooling and also provides a battery cell applying the laser welding tooling, which solves the problem that the pin is easily bent when the pin is welded to the tab, affecting the stability of the internal structure of the battery.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] A laser welding tooling includes a support base and a shaping plate:

[0006] At least one end of the support base in the first direction is connected to the shaping plate; the support base is used to support the shaping plate to prevent the pin from being bent when the head of the tab and the first connecting portion of the pin are welded; wherein, the shaping plate extends in the first direction, and the shaping plate is disposed between the first connecting portion of the pin and the first end face of the battery cell from which the tab is led out.

[0007] Optionally, the support base includes a first support plate and a second support plate. Both ends of the first support plate in the first direction are connected to the shaping plate; both ends of the first support plate in the second direction are connected with the second support plate, and the distance between the two second support plates is configured to be equal to or greater than the thickness of the battery cell; the first direction and the second direction are perpendicular to each other.

[0008] Optionally, the shaping plate has a shaping surface in the third direction, and the shaping surface is configured to face the first end face of the battery cell; the first support plate has a first support surface and a second support surface arranged oppositely in the third direction, and the first support surface is configured to face away from the battery cell; in the third direction, the maximum distance between the shaping surface and the first support surface is less than or equal to the distance between the first support surface and the second support surface, and the third direction is perpendicular to the second direction.

[0009] Optionally, in the above laser welding tooling, the shaping plate has a bearing surface along the third direction, and the bearing surface is configured to face the first connecting portion of the pin; a heat insulation sheet is arranged on the bearing surface of the shaping plate, and the heat insulation sheet is configured to bear the first connecting portion of the pin.

[0010] Optionally, in the above laser welding tooling, the shaping plate has a free end arranged away from the support base along the first direction, and a first support portion is arranged at the free end. The first support portion is configured to be inserted and cooperatively connected with a second support portion of the pin to fix the free end of the shaping plate.

[0011] Optionally, in the above laser welding tooling, a first positioning portion is arranged on the first support surface of the support base and extends along the first direction; the first positioning portion is configured to be inserted and connected with a second positioning portion of the first connecting portion to fix the pin.

[0012] Optionally, in the above laser welding tooling, the first positioning portion is a positioning boss, and the positioning boss has an overhanging portion that exceeds the first support surface in the first direction. The overhanging portion and the shaping plate are in a one-to-one correspondence.

[0013] Optionally, in the above laser welding tooling, the overhanging portion of the positioning boss is inserted and cooperatively connected with one end of the heat insulation sheet close to the support base, and one end of the heat insulation sheet away from the support base is configured to be inserted and cooperatively connected with the second support portion of the pin.

[0014] Optionally, in the above laser welding tooling, the shaping plate has a first guiding surface, a second guiding surface, a shaping surface and a bearing surface oppositely arranged along the third direction. The bearing surface is configured to face the first connecting portion of the pin; the first guiding surface is configured to contact a bent portion of the tab; the shaping surface has a first inclined surface and a second inclined surface, and the first inclined surface is configured to contact a root portion of the tab; the first inclined surface and the bearing surface are connected by the first guiding surface; wherein, in the third direction, the distance from one end of the first inclined surface close to the first guiding surface to the bearing surface is less than the distance from one end of the first inclined surface away from the first guiding surface to the bearing surface; the third direction and the first direction are perpendicular to each other;

[0015] The second guiding surface and the first guiding surface are oppositely arranged along the second direction; the second inclined surface and the first inclined surface are oppositely arranged along the second direction; the second inclined surface and the bearing surface are connected through the second guiding surface; wherein, in the third direction, the distance from one end of the second inclined surface close to the second guiding surface to the bearing surface is less than the distance from the other end of the second inclined surface far from the second guiding surface to the bearing surface.

[0016] A battery cell includes:

[0017] A battery core, having a battery core body and a tab. The battery core body has a first end face along the third direction; the tab includes a root portion, a bent portion and a head portion which are connected in sequence; the root portion of the tab extends out from the first end face of the battery core body.

[0018] A cover plate assembly is arranged on one side of the battery core in the first direction; the cover plate assembly has a pole column.

[0019] A pin has a first connecting portion and a second connecting portion; one end of the first connecting portion is connected to the second connecting portion, and a second positioning portion is arranged at the other end of the first connecting portion; the second connecting portion is connected to the pole column; in the first direction, a second supporting portion is arranged on the side of the second connecting portion far from the pole column; the first connecting portion is located between the head portion and the root portion of the tab, and the first connecting portion and the head portion of the tab are connected through the above-mentioned laser welding tooling.

[0020] In the laser welding tooling and the battery cell provided by the present utility model, since the shaping plate is used to carry the head portion of the tab and the first connecting portion of the pin, and the supporting seat is used to support the shaping plate, when welding the head portion of the tab and the first connecting portion of the pin, it is possible to avoid bending the pin and avoid affecting the internal structure stability of the battery. Description of the Drawings

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to the provided drawings.

[0022] Figure 1 It is a schematic structural diagram of the battery core and the tooling in the embodiment of the present utility model;

[0023] Figure 2 For Figure 1 partial enlarged view of;

[0024] Figure 3Structural schematic of the tooling in the embodiment of the present utility model Figure 1 ;

[0025] Figure 4 is Figure 3 Structural schematic of the pin cooperating therewith Figure 1 ;

[0026] Figure 5 is Figure 3 Structural schematic of the pin cooperating therewith Figure 2 ;

[0027] Figure 6 Structural schematic of the pin and the tooling in the embodiment of the present utility model Figure 2 ;

[0028] Figure 7 is Figure 6 Structural schematic diagram of the tooling in

[0029] Figure 8 is Figure 6 Structural schematic diagram of the pin in

[0030] Figure 9 Partial sectional view of the battery and the tooling in the embodiment of the present utility model

[0031] Figures 1 - 9 In

[0032] 1. Support base; 1-1. First support plate; 1-11. First support surface; 1-12. Second support surface; 1-2. Second support plate;

[0033] 2. Shaping plate; 2-1. Bearing surface; 2-2. First inclined surface; 2-3. First guiding surface;

[0034] 2-4. Second guiding surface; 2-5. Second inclined surface; 2-6. Corner arc surface;

[0035] 3. First support part; 4. First positioning part; 5. Heat insulation sheet; 10. Battery cell;

[0036] 20. Pin; 201. First connecting part; 202. Second connecting part; 203. Second positioning part; 204. Second support part;

[0037] 30. Tab; 301. Head; 302. Bent part; 303. Root part. Detailed implementation manners

[0038] The present utility model provides a laser welding tooling and a battery cell

[0039] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts belong to the protection scope of the present invention.

[0040] An existing battery cell includes a battery core 10, two cover plate assemblies, and two pins 20. The two cover plate assemblies are arranged opposite to each other in the first direction; the battery core 10 is disposed between the two cover plate assemblies; the battery core 10 has a battery core body and two ear tabs 30 with opposite polarities. The battery core body has a first end face along the third direction, and both ear tabs 30 extend from the first end face of the battery core body; the ear tab 30 with a positive polarity is welded to the first connection portion 201 of the pin 20 with a positive polarity, the second connection portion 202 of the pin 20 with a positive polarity is welded to the cover plate assembly with a positive polarity, the ear tab 30 with a negative polarity is welded to the first connection portion 201 of the pin 20 with a negative polarity, and the second connection portion 202 of the pin 20 with a negative polarity is connected to the cover plate assembly with a negative polarity.

[0041] Among them, when the head 301 of the ear tab 30 and the first connection portion 201 of the pin 20 are laser welded, it is necessary to press the head 301 of the ear tab 30 against the first connection portion 201 of the pin 20. It is found that the pin 20 is easily bent, that is, the first connection portion 201 of the pin 20 inclines towards the direction close to the first end face of the battery core body.

[0042] For this reason, referring to Figures 1 - 9 , the embodiment of the present invention provides a laser welding tooling to solve the problem of bending the pin 20 when the head 301 of the existing ear tab 30 and the first connection portion 201 of the pin 20 are laser welded.

[0043] Referring to Figure 2 and 3 , the laser welding tooling of this embodiment includes a support base 1 and a shaping plate 2. At least one end of the support base 1 in the first direction is connected to the shaping plate 2; the support base 1 is used to support the shaping plate 2 to prevent the pin 20 from being bent when the head 301 of the ear tab 30 and the first connection portion 201 of the pin 20 are welded; wherein, the shaping plate 2 extends in the first direction, and the shaping plate 2 is disposed between the first connection portion 201 of the pin 20 and the first end face of the battery core 10 from which the ear tab 30 extends. The first direction is the length direction of the battery, as detailed in Figure 1 the m direction in

[0044] In this embodiment, since the support base 1 supports the shaping plate 2, and the shaping plate 2 bears and supports the head 301 of the tab 30 and the first connecting portion 201 of the pin 20, when the head 301 of the tab 30 is pressed against the first connecting portion 201 of the pin 20 for laser welding, it can provide support for the first connecting portion 201 of the pin 20, thereby avoiding the first connecting portion 201 of the pin 20 from tilting towards the first end face of the battery cell 10, that is, avoiding the problem of unstable internal structure of the battery caused by bending the pin 20.

[0045] It should be noted that the shaping plate 2 can be entirely located between the first connecting portion 201 of the pin 20 and the first end face of the battery cell 10, or partially located between the first connecting portion 201 of the pin 20 and the first end face of the battery cell 10, which is specifically determined according to the design, as long as it is ensured that the support base 1 does not interfere with the pin 20 and the tab 30, and the shaping plate 2 can bear the head 301 of the tab 30.

[0046] It should also be noted that at least one end of the support base 1 in the first direction is connected to the shaping plate 2, that is, one end of the support base 1 in the first direction is connected to the shaping plate 2; or both ends of the support base 1 in the first direction are connected to the shaping plate 2.

[0047] In some embodiments, referring to Figure 3 , both ends of the support base 1 in the first direction are connected to the shaping plate 2. When shaping plates 2 are provided at both ends of the support base 1 in the first direction, the laser welding tooling can be placed at the first position first, so that one shaping plate 2 extends between the first connecting portion 201 of the pin 20 and the first end face of the battery cell 10; after welding one tab 30 and the corresponding pin 20 with the same polarity, the laser welding tooling is moved along the first direction to the second position, and then the other shaping plate 2 can extend between the first connecting portion 201 of the pin 20 and the first end face of the battery cell 10; that is to say, only by moving the laser welding tooling along the first direction, compared with the case where a shaping plate 2 is provided at one end of the support base 1 in the first direction, the operation is more convenient.

[0048] In some embodiments, referring to Figure 3 , for the convenience of disassembling and assembling the laser welding tooling and the battery cell 10, specifically in implementation, the support base 1 includes a first support plate 1-1 and a second support plate 1-2. At least one end of the first support plate 1-1 in the first direction is connected to the shaping plate 2, that is, one end of the first support plate 1-1 in the first direction is connected to the shaping plate 2, or both ends of the first support plate 1-1 in the first direction are connected to the shaping plate 2; both ends of the first support plate 1-1 in the second direction are connected to the second support plate 1-2, and the distance between the two second support plates 1-2 is configured to be equal to or greater than the thickness of the battery cell 10.

[0049] The first support plate 1-1 is supported by two second support plates 1-2, making the support seat 1 structurally stable. The distance between the two second support plates 1-2 is configured to be equal to or greater than the thickness of the battery cell 10, so that the battery cell 10 can be accommodated between the two second support plates 1-2, and thus the use space can be fully utilized. When the distance between the two second support plates 1-2 is configured to be greater than the thickness of the battery cell 10, it is beneficial for the relative movement of the battery cell 10 and the support seat 1 in the first direction, and thus beneficial for the welding work when the shaping plates 2 are connected to both ends of the first support plate 1-1 in the first direction.

[0050] It should be noted that the first direction and the second direction are perpendicular to each other, and the second direction is the battery thickness direction. For details, see Figure 1 the n direction in

[0051] Furthermore, the shaping plate 2 has a shaping surface in the third direction, and the bearing surface 2-1 is configured to face the first end face of the battery cell 10; the first support plate 1-1 has a relatively arranged first support surface 1-11 and a second support surface 1-12 in the third direction, and the first support surface 1-11 is configured to face away from the battery cell 10; in the third direction, the maximum distance between the shaping surface and the first support surface 1-11 is less than or equal to the distance between the first support surface 1-11 and the second support surface 1-12, and the third direction is perpendicular to the second direction.

[0052] By designing that in the third direction, the maximum distance between the shaping surface and the first support surface 1-11 is less than or equal to the distance between the first support surface 1-11 and the second support surface 1-12, it can be avoided that the first support plate 1-1 contacts the first end face of the battery cell 10 before the shaping plate 2, and thus it is ensured that the shaping surface of the shaping plate 2 can shape the ear 30.

[0053] It should be noted that the third direction is the battery height direction. For details, see Figure 1 the p direction in

[0054] Furthermore, the shaping plate 2 has a bearing surface 2-1 arranged away from the shaping surface in the third direction. In the third direction, the distance between the first support surface 1-11 and the second support surface 1-12 is less than or equal to the distance between the bearing surface 2-1 and the second support surface 1-12.

[0055] By making the distance between the first support surface 1-11 and the second support surface 1-12 less than or equal to the distance between the bearing surface 2-1 and the second support surface 1-12 in the third direction, when the length of the shaping plate 2 is less than the length of the first connecting portion 201 of the pin 20, interference between the support base 1 and the pin 20 is avoided.

[0056] In some embodiments, referring to Figure 9 , when laser welding the head 301 of the tab 30 and the first connecting portion 201 of the pin 20, the heat generated by the laser welding easily passes through the pin 20 and burns through the diaphragm in the battery cell 10, causing a short-circuit risk. Therefore, in specific implementation, the shaping plate 2 has a bearing surface 2-1 in the third direction, and the bearing surface 2-1 is configured to face the first connecting portion 201 of the pin 20; a heat-insulating sheet 5 is provided on the bearing surface 2-1 of the shaping plate 2, and the heat-insulating sheet 5 is configured to bear the first connecting portion 201 of the pin 20.

[0057] By providing the heat-insulating sheet 5 to reduce the transfer of the heat generated by the laser welding, the diaphragm in the battery cell 10 is further prevented from being burned through. It should be noted that the heat-insulating sheet 5 includes mica and ceramics, but is not limited thereto. The specific type of the heat-insulating sheet 5 can be specifically designed by those skilled in the art according to actual needs.

[0058] In some embodiments, referring to Figures 5 - 8 , since one end of the shaping plate 2 is fixed and the other end is suspended, it generates lateral deflection and bending under the action of force. In order to prevent the shaping plate 2 from being bent when the head 301 of the tab 30 is pressed against the first connecting portion 201 of the pin 20 for laser welding, in specific implementation, the shaping plate 2 has a free end disposed away from the support base 1 in the first direction, and a first support portion 3 is provided at the free end. The first support portion 3 is configured to be inserted and cooperatively connected with the second support portion 204 of the pin 20 to fix the free end of the shaping plate 2.

[0059] By connecting the two ends of the shaping plate 2 to the support portion and the pin 20 respectively, both ends of the shaping plate 2 are supported, which can better ensure the stiffness of the shaping plate 2 and make the first connecting portion 201 not easily bent.

[0060] It should be noted that when the first support portion 3 is a convex structure, the second support portion 204 is a concave structure, and when the first support portion 3 is a concave structure, the second support portion 204 is a convex structure. Among them, in order to reduce the weight of the pin 20, the second support portion 204 is designed as a concave structure, and the first support portion 3 is a concave structure.

[0061] Furthermore, referring to Figure 6 and 7, for positioning the pin 20 and the support base 1, in specific implementation, the support base 1 has a first support surface 1-11 along the third direction, and the first support surface 1-11 is configured to face away from the battery cell 10; a first positioning portion 4 is provided on the first support surface 1-11 of the support base 1, and the first positioning portion 4 extends along the first direction; the first positioning portion 4 is configured to be inserted and connected with a second positioning portion 203 of the first connecting portion 201 to fix the pin 20.

[0062] By inserting and connecting the first positioning portion 4 provided on the first support surface 1-11 of the support base 1, i.e., the first support plate 1-1, and the second positioning portion 203 of the first connecting portion 201, the positioning of the first connecting portion 201 of the pin 20 and the support base 1 is achieved.

[0063] It should be noted that while the first positioning portion 4 provided on the support base 1, i.e., the first support surface 1-11, is inserted and connected with the second positioning portion 203 of the first connecting portion 201, the first support portion of the shaping plate 2 is inserted and cooperatively connected with the second support portion 204 of the pin 20, which can limit all degrees of freedom of the pin 20 and facilitate the operation of the welding operation.

[0064] It should also be noted that when the first positioning portion 4 is a concave structure, the second positioning portion 203 is a convex structure, and when the first positioning portion 4 is a positioning boss, the second positioning portion 203 is a positioning notch. Among them, in order to reduce the weight of the pin 20, the first positioning portion 4 is designed as a positioning boss and the second positioning portion 203 is a positioning notch.

[0065] Specifically in this embodiment, refer to Figure 6 and 7 , the first positioning portion 4 is a positioning boss, and the positioning boss has an overhanging portion that exceeds the first support surface 1-11 in the first direction, and the overhanging portion and the shaping plate 2 are in a one-to-one correspondence relationship; that is, when there is one shaping plate 2, there is also one overhanging portion, and the overhanging portion is placed on the shaping plate 2; when there are two shaping plates 2, there are also two overhanging portions, and the two overhanging portions are respectively placed on the two shaping plates 2.

[0066] Further, when a heat insulation sheet 5 is provided on the bearing surface 2-1 of the shaping plate 2, for the convenience of fixing the heat insulation sheet 5, the overhanging portion of the positioning boss is inserted and cooperatively connected with one end of the heat insulation sheet 5 close to the support base 1, and the end of the heat insulation sheet 5 away from the support base 1 is configured to be inserted and cooperatively connected with the second support portion 204 of the pin 20. By inserting and cooperatively connecting the two ends of the heat insulation sheet 5 in the first direction with the overhanging portion of the positioning boss and the second support portion 204 respectively, all degrees of freedom of the heat insulation sheet 5 are limited, facilitating the welding operation.

[0067] In some embodiments, refer to Figure 9, in order for the shaping plate 2 to shape the tab 30, the shaping plate 2 has a first guiding surface 2-3, a second guiding surface 2-4, and shaping surfaces and a bearing surface 2-1 that are oppositely arranged in the third direction. The bearing surface 2-1 is configured to face the first connecting portion 201 of the pin 20; the first guiding surface 2-3 is configured to contact the bent portion 302 of the tab 30; the shaping surface has a first inclined surface 2-2 and a second inclined surface 2-5, and the first inclined surface 2-2 is configured to contact the root 303 of the tab 30; the first inclined surface 2-2 and the bearing surface 2-1 are connected by the first guiding surface 2-3; wherein, in the third direction, the distance from the end of the first inclined surface 2-2 close to the first guiding surface 2-3 to the bearing surface 2-1 is less than the distance from the end of the first inclined surface 2-2 far from the first guiding surface 2-3 to the bearing surface 2-1; the third direction and the first direction are perpendicular to each other.

[0068] The second guiding surface 2-4 and the first guiding surface 2-3 are oppositely arranged in the second direction; the second inclined surface 2-5 and the first inclined surface 2-2 are oppositely arranged in the second direction; the second inclined surface 2-5 and the bearing surface 2-1 are connected by the second guiding surface 2-4; wherein, in the third direction, the distance from the end of the second inclined surface 2-5 close to the second guiding surface 2-4 to the bearing surface 2-1 is less than the distance from the end of the second inclined surface 2-5 far from the second guiding surface 2-4 to the bearing surface 2-1.

[0069] By providing the inclined surface, i.e., the inclined surface presses on the root 303 of the tab 30, and by providing the guiding surface, i.e., guiding the tab 30 to be bent to form the bent portion 302 and the head 301, the tab 30 can be shaped. Furthermore, when welding and assembling the head 301 of the tab 30 and the first connecting portion 201 of the pin 20, the shaping work of the tab 30 is also carried out. The welding process of the pin 20 and the shaping process of the tab 30 are combined, improving the production efficiency;

[0070] It should be noted that the designed and matched first inclined surface 2-2 and first guiding surface 2-3, and the matched second guiding surface 2-4 and second inclined surface 2-5 enable the shaping work of two tabs 30 to be carried out simultaneously.

[0071] Furthermore, in order to avoid damage to the first end face of the battery cell 10 by the shaping surface, the shaping surface further has a corner arc surface 2-6 connecting the first inclined surface 2-2 and the second inclined surface 2-5.

[0072] An embodiment of the present utility model provides a battery cell, including a battery core 10, a cover plate assembly, and pins 20. The battery core 10 has a battery core body and tabs 30. The battery core body has a first end face along a third direction; the tab 30 includes a root portion 303, a bent portion 302, and a head portion 301 connected in sequence; the root portion 303 extends from the first end face of the battery core 10 body; the cover plate assembly is arranged on one side of the battery core 10 in a first direction; the cover plate assembly has a pole column; the pin 20 has a first connection portion 201 and a second connection portion 202; one end of the first connection portion 201 is connected to the second connection portion 202, and a second positioning portion 203 is arranged at the other end of the first connection portion 201; the second connection portion 202 is connected to the pole column; in the first direction, a second support portion 204 is arranged on the side of the second connection portion 202 away from the pole column; the first connection portion 201 is located between the head portion 301 and the root portion 303 of the tab 30, and the first connection portion 201 and the head portion 301 of the tab 30 are connected by the above-mentioned laser welding tooling.

[0073] When welding the tab 30 and the pin 20 is required, the first support portion 3 at the free end of the shaping plate 2 and the second support portion 204 of the pin 20 are inserted and matched, and the second positioning portion 203 of the pin 20 and the first positioning portion 4 on the support seat 1 are inserted and matched to realize full-degree-of-freedom restriction of the pin 20. Due to the presence of the shaping surface of the shaping plate 2, the tab 30 can be shaped to obtain the root portion 303, the bent portion 302, and the head portion 301 of the tab 30. At this time, the head portion 301 of the tab 30 is placed on the first connection portion 201 of the pin 20. Finally, the laser welding equipment is used to press the head portion 301 of the tab 30 against the first connection portion 201 of the pin 20 and perform welding.

[0074] It should be noted that since two tabs 30 with opposite polarities are led out from the first end face of the battery core 10, after welding one tab 30 and the pin 20 with the corresponding polarity, the direction of the laser welding tooling can be moved along the first direction or the direction of the laser welding tooling can be rotated 180 degrees around the third direction to perform the welding work on the other tab 30 and the pin 20 with the corresponding polarity.

[0075] It can be seen that in the battery cell provided by the present utility model, at least one end of the support seat 1 of the laser welding tooling used along the first direction is connected to the shaping plate 2. The support seat 1 is used to support the shaping plate 2 to prevent the first connection portion 201 of the pin 20 from being bent when the head portion 301 of the tab 30 and the first connection portion 201 of the pin 20 are welded, and to avoid affecting the internal structure stability of the battery. Moreover, since the shaping plate 2 has a shaping surface, the shaping of the tab 30 can be completed while the head portion 301 of the tab 30 and the first connection portion 201 of the pin 20 are welded and assembled.

[0076] The components and devices involved in the present utility model are only illustrative examples and do not intend to require or imply that they must be connected, arranged, and configured in the manner shown in the drawings. As those skilled in the art will recognize, these components and devices can be connected, arranged, and configured in any way. Words such as "comprising", "including", "having", etc. are open-ended terms, meaning "including but not limited to", and can be used interchangeably with each other. The words "or" and "and" used herein refer to the phrase "and / or", and can be used interchangeably with it, unless the context clearly indicates otherwise. The word "such as" used herein refers to the phrase "such as but not limited to", and can be used interchangeably with it.

[0077] It should also be noted that in the device of the present utility model, each component can be disassembled and / or recombined. These disassembly and / or recombination should be regarded as equivalent solutions of the present utility model.

[0078] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use the present utility model. Various modifications to these aspects are very obvious to those skilled in the art, and the general principles defined herein can be applied to other aspects without departing from the scope of the present utility model. Therefore, the present utility model is not intended to be limited to the aspects shown herein, but rather to the broadest scope consistent with the principles and novel features disclosed herein.

[0079] The above description has been given for purposes of illustration and description. In addition, this description does not intend to limit the embodiments of the present utility model to the forms disclosed herein. Although multiple example aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, changes, additions, and sub-combinations thereof.

[0080] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, etc. made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A laser welding tooling, characterized in that, It includes a support base (1) and a shaping plate (2), At least one end of the support base (1) in the first direction is connected to the shaping plate (2); the support base (1) is used to support the shaping plate (2) to prevent the pin (20) from being bent when the head (301) of the tab (30) and the first connection part (201) of the pin (20) are welded; wherein, the shaping plate (2) extends in the first direction, and the shaping plate (2) is arranged between the first connection part (201) of the pin (20) and the first end face of the tab (30) led out from the battery cell (10).

2. The laser welding tooling according to claim 1, wherein The support base (1) includes a first support plate (1-1) and a second support plate (1-2), both ends of the first support plate (1-1) in the first direction are connected to the shaping plate (2); both ends of the first support plate (1-1) in the second direction are connected with the second support plate (1-2), and the distance between the two second support plates (1-2) is configured to be equal to or greater than the thickness of the battery cell (10); the first direction and the second direction are perpendicular to each other.

3. The laser welding tooling according to claim 2, wherein, The shaping plate (2) has a shaping surface in the third direction, and the shaping surface is configured to face the first end face of the battery cell (10); the first support plate (1-1) has a first support surface (1-11) and a second support surface (1-12) arranged oppositely in the third direction, and the first support surface (1-11) is configured to face away from the battery cell (10); in the third direction, the maximum distance between the shaping surface and the first support surface (1-11) is less than or equal to the distance between the first support surface (1-11) and the second support surface (1-12), and the third direction is perpendicular to the second direction.

4. The laser welding tooling according to claim 1, characterized in that, The shaping plate (2) has a bearing surface (2-1) in the third direction, and the bearing surface (2-1) is configured to face the first connection part (201) of the pin (20); a heat insulation sheet (5) is arranged on the bearing surface (2-1) of the shaping plate (2), and the heat insulation sheet (5) is configured to bear the first connection part (201) of the pin (20).

5. The laser welding tooling according to any one of claims 1 to 4, characterized in that, The shaping plate (2) has a free end arranged away from the support base (1) in the first direction, and a first support part (3) is arranged at the free end, and the first support part (3) is configured to be inserted and cooperatively connected with the second support part (204) of the pin (20) to fix the free end of the shaping plate (2).

6. The laser welding tooling according to claim 5, wherein, A first positioning part (4) is arranged on the first support surface (1-11) of the support base (1), and the first positioning part (4) extends in the first direction; the first positioning part (4) is configured to be inserted and connected with the second positioning part (203) of the first connection part (201) to fix the pin (20).

7. The laser welding tooling according to claim 6, wherein The first positioning part (4) is a positioning boss, and the positioning boss has an overhanging part exceeding the first support surface (1-11) in the first direction, and the overhanging part and the shaping plate (2) are in one-to-one correspondence.

8. The laser welding tool according to claim 7, characterized in that: The protruding portion of the positioning boss is plug-fitted with an end of the heat insulating plate (5) close to the support seat (1), and the end of the heat insulating plate (5) away from the support seat (1) is configured to be plug-fitted with the second supporting portion (204) of the pin (20).

9. The laser welding tooling according to claim 1, wherein The shaping plate (2) has a first guide surface (2-3), a second guide surface (2-4), and a shaping surface and a bearing surface (2-1) arranged opposite to each other along a third direction. The bearing surface (2-1) is arranged to face the first connecting portion (201) of the pin (20); the first guide surface (2-3) is arranged to contact the bent portion (302) of the tab (30); the shaping surface has a first inclined surface (2-2) and a second inclined surface (2-5). The first inclined surface (2-2) is arranged to contact the bent portion (302) of the tab (30). The roots (303) of the tabs (30) are in contact; the first inclined surface (2-2) and the bearing surface (2-1) are connected via the first guide surface (2-3); wherein, in the third direction, the distance from one end of the first inclined surface (2-2) close to the first guide surface (2-3) to the bearing surface (2-1) is smaller than the distance from one end of the first inclined surface (2-2) away from the first guide surface (2-3) to the bearing surface (2-1); the third direction and the first direction are perpendicular to each other; The second guide surface (2-4) and the first guide surface (2-3) are arranged relative to each other along the second direction; the second inclined surface (2-5) and the first inclined surface (2-2) are arranged relative to each other along the second direction; the second inclined surface (2-5) and the bearing surface (2-1) are connected via the second guide surface (2-4); wherein, in the third direction, the distance from the end of the second inclined surface (2-5) close to the second guide surface (2-4) to the bearing surface (2-1) is smaller than the distance from the end of the second inclined surface (2-5) far from the second guide surface (2-4) to the bearing surface (2-1).

10. A battery cell, characterized in that, include: A battery cell (10) comprises a battery cell body and a tab (30), wherein the battery cell body has a first end face along a third direction; the tab (30) comprises a root portion (303), a bent portion (302), and a head portion (301) connected in sequence; the root portion (303) of the tab (30) is led out from the first end face of the battery cell body; A cover plate assembly is arranged on one side of the battery core (10) in a first direction; the cover plate assembly has a pole; Pin (20), having a first connection portion (201) and a second connection portion (202); one end of the first connection portion (201) is connected to the second connection portion (202), and a second positioning portion (203) is provided at the other end of the first connection portion (201); the second connection portion (202) is connected to the pole column; in the first direction, a second support portion (204) is provided on the side of the second connection portion (202) away from the pole column; the first connection portion (201) is located between the head (301) and the root (303) of the tab (30), and the first connection portion (201) and the head (301) of the tab (30) are connected by the laser welding tooling according to any one of claims 1 to 9.

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