Busbar positioning tool for welding battery module

Abstract

The utility model belongs to the field of battery module welding tools, and particularly relates to a busbar positioning tool for welding a battery module, the busbar positioning tool for welding the battery module comprises an insulating plate and a limiting assembly, the insulating plate can be limited in the length direction of the battery module through two first limiting pieces in the limiting assembly, and the insulating plate can be positioned in the length direction of the battery module; the insulating plate can be limited in the width direction of the battery module through the two second limiting pieces in the limiting assembly, so that after the insulating plate is arranged at the top of the battery module, the limiting assembly is used for limiting the insulating plate at the top of the battery module, the insulating plate is prevented from shifting relative to the battery module in the subsequent welding process, and the welding quality of the battery module is improved. The welding reject ratio is reduced, and the welding efficiency is improved.

Description

Technical Field

[0001] The present application relates to the technical field of battery module welding tooling, and in particular to a busbar positioning tooling for battery module welding. Background Art

[0002] In the battery industry, to improve battery life, battery modules are often formed by connecting different numbers of batteries in series or parallel to provide the corresponding voltage or current for the load. Currently, in battery modules, the busbars (also known as busbars) and battery terminals are often fixedly connected by welding, forming a series-parallel relationship for multiple batteries.

[0003] Laser welding of battery poles and busbars is a key process in module formation. A square battery module is composed of multiple square battery cells. It is necessary to ensure that the poles and busbars of each battery cell in a module are tightly fitted and not misaligned to ensure good welding between the battery module and the busbar.

[0004] The existing positioning fixture consists of a single plate with a hollowed-out slot. During use, the fixture is placed on top of a battery module composed of multiple cells. The busbars are placed within the hollowed-out slots and aligned with the terminals of each cell in the module before laser welding. During welding, the fixture can easily become unstable and shift from its original position on top of the battery module, resulting in poor weld quality and reduced welding efficiency. Utility Model Content

[0005] An embodiment of the present application provides a busbar positioning tool for battery module welding, which aims to improve the reliability of the tool's positioning on the top of the battery module and avoid the tool's sliding and offset during welding, which may lead to undesirable phenomena such as busbar welding deviation and blown welds.

[0006] To achieve the above objectives, the present application provides a busbar positioning tool for battery module welding, comprising:

[0007] An insulating plate, wherein a plurality of busbar positioning openings are provided on the insulating plate, and the busbar positioning openings are distributed in the same position as the busbars on the battery module; and

[0008] The limiting assembly includes two first limiting members and two second limiting members, the two first limiting members are respectively installed at the opposite ends of the insulating plate in the first direction and both protrude from the lower surface of the insulating plate; the two second limiting members are respectively installed at the opposite ends of the insulating plate in the second direction and both protrude from the lower surface of the insulating plate, the second direction is perpendicular to the first direction, and the spacing between the two first limiting members in the first direction and the spacing between the two second limiting members in the second direction are respectively adapted to the length and width of the battery module.

[0009] Optionally, the limiting assembly further includes a plurality of fastening screws, and the two first limiting members and the two second limiting members are respectively mounted on the lower surface of the insulating plate through the fastening screws.

[0010] Optionally, the insulating plate is provided with first waist-shaped holes extending along the first direction at both opposite ends in the first direction, and the top of the first limiting member is fixed to the lower surface of the insulating plate by the fastening screws provided in the first waist-shaped holes;

[0011] The insulating plate is provided with second waist-shaped holes extending along the second direction at both opposite ends in the second direction, and the top of the second limiting member is fixed to the lower surface of the insulating plate by the fastening screws provided in the second waist-shaped holes.

[0012] Optionally, the first waist-shaped hole and the second waist-shaped hole are both countersunk holes.

[0013] Optionally, both opposite ends of the insulating plate in the first direction are provided with first guide grooves extending along the first direction, and the top of the first limiting member is provided with a first sliding portion adapted to the first guide groove;

[0014] Two opposite ends of the insulating plate in the second direction are each provided with a second guide groove extending along the second direction, and a second sliding portion adapted to the second guide groove is provided on the top of the second limiting member.

[0015] Optionally, the first limiting member and the second limiting member are both strip-shaped limiting blocks, and a guide slope is provided on the opposite inner side of the two first limiting members away from the insulating plate, and a guide slope is also provided on the opposite inner side of the two second limiting members away from the insulating plate.

[0016] Optionally, the insulating plate is rectangular, the first direction corresponds to the length direction of the insulating plate, and the second direction corresponds to the width direction of the insulating plate.

[0017] Optionally, the multiple busbar positioning ports include a positive output busbar positioning port, a negative output busbar positioning port and several intermediate connecting busbar positioning ports, and the positive output busbar positioning port and the negative output busbar positioning port are both located on the battery module at one end and extend to the outside of the battery module at the other end. The busbar positioning tool for battery module welding also includes two supporting assemblies, and the two supporting assemblies are both installed on the lower surface of the insulating plate and are respectively located at one end of the positive output busbar positioning port and the negative output busbar positioning port away from the battery module. The two supporting assemblies are respectively used to support the buses placed in the positive output busbar positioning port and the negative output busbar positioning port.

[0018] Optionally, the supporting assembly includes a base, a slider, a pull rod and an elastic member. The base is fixed to the lower surface of the insulating plate by screws, and the slider is slidably arranged on the base. One end of the slider is provided with a wedge-shaped support surface, and the other end is connected to the pull rod. The elastic member is arranged between the slider and the base. Under the action of the elastic member, the end of the slider provided with the wedge-shaped support surface extends to the bottom of the positive output bus positioning port / the negative output bus positioning port away from the end of the battery module.

[0019] The beneficial effect of the busbar positioning tool for battery module welding provided in the present application is that: compared with the existing technology, the busbar positioning tool for battery module welding provided in the present application can limit the insulating plate in the length direction of the battery module through two first limiting members, and can limit the insulating plate in the width direction of the battery module through two second limiting members. Therefore, after the insulating plate is placed on the top of the battery module, the limiting assembly is used to limit the insulating plate on the top of the battery module, thereby avoiding the displacement of the insulating plate relative to the battery module during subsequent welding, reducing the welding defect rate, and improving welding efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0021] in:

[0022] Figure 1 1 is a schematic structural diagram of a busbar positioning tool for welding a battery module according to an embodiment of the present application;

[0023] Figure 2 yes Figure 1 A schematic structural diagram of a busbar positioning tool for battery module welding from another perspective is shown;

[0024] Figure 3 1 is a schematic diagram of an exploded structure of a busbar positioning tool for battery module welding according to an embodiment of the present application;

[0025] Figure 4 This is a structural schematic diagram of a supporting assembly in a busbar positioning tool for battery module welding according to an embodiment of the present application;

[0026] Figure 5 This is a top view of the battery module after welding using the busbar positioning tool for battery module welding of the present application.

[0027] Description of main component symbols:

[0028] 100, insulating plate; 101, positive output busbar positioning port; 102, negative output busbar positioning port; 103, intermediate connecting busbar positioning port; 1011, first waist-shaped hole; 1012, second waist-shaped hole; 1013, first guide groove; 1014, second guide groove;

[0029] 200, first position-limiting member; 210, first sliding portion;

[0030] 300, second position-limiting member; 310, second sliding portion;

[0031] 400, supporting assembly; 410, base; 420, slider; 421, wedge-shaped supporting surface; 430, pull rod; 440, elastic member. DETAILED DESCRIPTION

[0032] To facilitate understanding of the present application, the present application will be described more fully below with reference to the accompanying drawings. The accompanying drawings illustrate preferred embodiments of the present application. However, the present application may be implemented in many other forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and comprehensive understanding of the disclosure of the present application.

[0033] It should be noted that when an element is referred to as being “fixed on” or “disposed on” another element, it may be directly on the other element or indirectly on the other element. When an element is referred to as being “connected to” another element, it may be directly connected to the other element or indirectly connected to the other element.

[0034] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0035] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0036] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application pertains. The terms used herein in the specification of this application are for the purpose of describing specific embodiments only and are not intended to limit this application.

[0037] It should also be noted that, in the embodiments of the present application, the same figure mark represents the same component or the same part. For the same parts in the embodiments of the present application, the figure may only mark one of the parts or components as an example. It should be understood that the figure mark also applies to other identical parts or components.

[0038] As described in the background technology, the existing bus positioning tool is only a plate with a hollow groove. When in use, the positioning tool is placed on the top of a battery module composed of multiple battery cells. During the actual welding operation, it is easy for the tool to be unstable and offset on the top of the battery module, resulting in poor welding and affecting welding efficiency.

[0039] In order to solve the above problems, the embodiment of the present application provides a busbar positioning tool for battery module welding, such as Figure 1-Figure 3 As shown, the busbar positioning tool for battery module welding includes an insulating plate 100 and a stopper assembly. The insulating plate 100 is provided with multiple busbar positioning openings, which are located in the same locations as the busbars on the battery module. It can be understood that the busbar positioning openings are used to position the busbars to be welded. By welding the busbars, the positive and negative electrodes of two adjacent battery cells in the module are connected, achieving series / parallel connection of all battery cells in the battery module. The limiting assembly includes two first limiting members 200 and two second limiting members 300. The two first limiting members 200 are respectively installed at the opposite ends of the insulating plate 100 in the first direction and both protrude from the lower surface of the insulating plate 100; the two second limiting members 300 are respectively installed at the opposite ends of the insulating plate 100 in the second direction and both protrude from the lower surface of the insulating plate 100. The second direction is perpendicular to the first direction. The spacing between the two first limiting members 200 in the first direction and the spacing between the two second limiting members 300 in the second direction are respectively adapted to the length and width of the battery module.

[0040] In order to facilitate the description of directions, an XY coordinate system is established in the figure, wherein the direction of the X axis is the first direction, and the direction of the Y axis is the second direction.

[0041] In an embodiment of the present application, the busbar positioning tool for battery module welding can limit the insulating plate 100 in the length direction of the battery module through two first limiting members 200, and can limit the insulating plate 100 in the width direction of the battery module through two second limiting members 300. Therefore, after the insulating plate 100 is placed on the top of the battery module, the limiting assembly is used to limit the insulating plate 100 on the top of the battery module, thereby avoiding displacement of the insulating plate 100 relative to the battery module during subsequent welding, reducing the welding defect rate, and improving welding efficiency.

[0042] In one embodiment, combining Figure 2-Figure 3 As shown, the stopper assembly also includes multiple fastening screws, and the two first stoppers 200 and the two second stoppers 300 are respectively mounted on the lower surface of the insulating plate 100 via fastening screws. With this design, the first stoppers 200 and the second stoppers 300 are connected to the insulating plate 100 via screws, which provides a reliable connection and facilitates production and assembly.

[0043] In a specific embodiment, Figure 1 As shown, the insulating plate 100 is provided with a first waist-shaped hole 1011 extending along the first direction at both opposite ends in the first direction, and the top of the first limiting member 200 is fixed to the lower surface of the insulating plate 100 by a fastening screw set in the first waist-shaped hole 1011; the insulating plate 100 is provided with a second waist-shaped hole 1012 extending along the second direction at both opposite ends in the second direction, and the top of the second limiting member 300 is fixed to the lower surface of the insulating plate 100 by a fastening screw set in the second waist-shaped hole 1012.

[0044] The design of the first waist-shaped hole 1011 and the second waist-shaped hole 1012 allows the first limiting member 200 and the second limiting member 300 to adjust their positions on the insulating plate 100, thereby adjusting the spacing between the two first limiting members 200 in the first direction and the spacing between the two second limiting members 300 in the second direction, so that the limiting assembly can better adapt to the length and width of the battery module.

[0045] Preferably, the first waist-shaped hole 1011 and the second waist-shaped hole 1012 are both countersunk holes, and thus the fastening screws do not protrude from the upper surface of the insulation plate 100 .

[0046] In a specific embodiment, Figure 1-Figure 3 As shown, the insulating plate 100 is provided with a first guide groove 1013 extending along the first direction at both opposite ends in the first direction, and the top of the first limit member 200 is provided with a first sliding portion 210 adapted to the first guide groove 1013; the insulating plate 100 is provided with a second guide groove 1014 extending along the second direction at both opposite ends in the second direction, and the top of the second limit member 300 is provided with a second sliding portion 310 adapted to the second guide groove 1014.

[0047] During the process of adjusting the first limit member 200, the first guide groove 1013 on the insulating plate 100 and the first sliding portion 210 on the first limit member 200 are used to cooperate to achieve guidance; similarly, during the process of adjusting the second limit member 300, the second guide groove 1014 on the insulating plate 100 and the second sliding portion 310 on the second limit member 300 are used to cooperate to achieve guidance.

[0048] Specifically, the first sliding portion 210 and the second sliding portion 310 may both be sliding blocks.

[0049] In one embodiment, if Figure 2 As shown, the first limiting member 200 and the second limiting member 300 are both strip-shaped limiting blocks, and the inner ends of the two first limiting members 200 away from the insulating plate 100 are provided with guiding slopes, and the inner ends of the two second limiting members 300 away from the insulating plate 100 are also provided with guiding slopes.

[0050] The design of the guiding slope facilitates the top of the battery module to be smoothly inserted into the space enclosed by the two first limiting members 200 and the two second limiting members 300 when the busbar positioning tool for battery module welding is installed on the top of the battery module.

[0051] In one embodiment, if Figure 1-Figure 3 As shown, the insulating plate 100 is rectangular, the first direction corresponds to the length direction of the insulating plate 100 , and the second direction corresponds to the width direction of the insulating plate 100 .

[0052] It is understandable that the battery module is generally a cubic structure, so designing the insulating plate 100 as a rectangular plate can better fit the top of the battery module and save materials. The insulating plate 100 can be made of bakelite.

[0053] In one embodiment, if Figure 1-Figure 3 As shown, multiple busbar positioning ports include a positive output busbar positioning port 101, a negative output busbar positioning port 102 and a plurality of intermediate connecting busbar positioning ports 103. The positive output busbar positioning port 101 and the negative output busbar positioning port 102 are both located on the battery module at one end and extend to the outside of the battery module at the other end. The busbar positioning tool for battery module welding also includes two supporting assemblies 400. The two supporting assemblies 400 are both installed on the lower surface of the insulating plate 100 and are respectively located at one end of the positive output busbar positioning port 101 and the negative output busbar positioning port 102 away from the battery module. The two supporting assemblies 400 are respectively used to support the buses placed in the positive output busbar positioning port 101 and the negative output busbar positioning port 102 to ensure that the buses placed in the positive output busbar positioning port 101 and the negative output busbar positioning port 102 will not fall off before welding.

[0054] The battery module after the busbar is welded using the busbar positioning fixture for battery module welding is as follows Figure 5 As shown, the two busbars at the upper and lower ends of the left side are the busbars positioned and welded through the positive output busbar positioning opening 101 and the negative output busbar positioning opening 102.

[0055] In a specific embodiment, Figure 2 and Figure 4 As shown, the supporting assembly 400 includes a base 410, a slider 420, a pull rod 430 and an elastic member 440 (such as a spring, a rubber band, a reed, etc.). The base 410 is fixed to the lower surface of the insulating plate 100 by screws, and the slider 420 is slidably set on the base 410. One end of the slider 420 is provided with a wedge-shaped supporting surface 421, and the other end is connected to the pull rod 430. The elastic member 440 is arranged between the slider 420 and the base 410. Under the action of the elastic member 440, one end of the slider 420 with the wedge-shaped supporting surface 421 extends to the bottom of the positive output bus positioning port 101 / negative output bus positioning port 102 away from the battery module, and the wedge-shaped supporting surface 421 on the slider 420 supports the suspended end of the bus (i.e., the end away from the battery module) located in the positive output bus positioning port 101 / negative output bus positioning port 102. After welding is completed, pull the pull rod 430 outward so that the slider 420 overcomes the elastic force of the elastic member 440 and is withdrawn from below the positive output bus positioning port 101 / negative output bus positioning port 102 away from one end of the battery module, making it easier for the entire battery module welding bus positioning tool to be removed upward from the top of the battery module.

[0056] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0057] The above embodiments merely illustrate several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, all of which fall within the scope of protection of the present application. Therefore, the scope of protection of the present application shall be determined by the appended claims.

Claims

1. A busbar positioning tool for battery module welding, characterized in that: include: An insulating plate, wherein a plurality of busbar positioning openings are provided on the insulating plate, and the busbar positioning openings are distributed in the same position as the busbars on the battery module; as well as The limiting assembly includes two first limiting members and two second limiting members, the two first limiting members are respectively installed at the opposite ends of the insulating plate in the first direction and both protrude from the lower surface of the insulating plate; the two second limiting members are respectively installed at the opposite ends of the insulating plate in the second direction and both protrude from the lower surface of the insulating plate, the second direction is perpendicular to the first direction, and the spacing between the two first limiting members in the first direction and the spacing between the two second limiting members in the second direction are respectively adapted to the length and width of the battery module.

2. The busbar positioning tool for battery module welding according to claim 1, characterized in that: The limiting assembly further includes a plurality of fastening screws, and the two first limiting members and the two second limiting members are respectively mounted on the lower surface of the insulating plate through the fastening screws.

3. The busbar positioning tool for battery module welding according to claim 2, characterized in that: The insulating plate is provided with first waist-shaped holes extending along the first direction at both opposite ends in the first direction, and the top of the first limiting member is fixed to the lower surface of the insulating plate by the fastening screws provided in the first waist-shaped holes; The insulating plate is provided with second waist-shaped holes extending along the second direction at both opposite ends in the second direction, and the top of the second limiting member is fixed to the lower surface of the insulating plate by the fastening screws provided in the second waist-shaped holes.

4. The busbar positioning tool for battery module welding according to claim 3, characterized in that: The first waist-shaped hole and the second waist-shaped hole are both countersunk holes.

5. The busbar positioning tool for battery module welding according to claim 3, characterized in that: The insulating plate is provided with first guide grooves extending along the first direction at both opposite ends in the first direction, and the top of the first limiting member is provided with a first sliding portion adapted to the first guide groove; Two opposite ends of the insulating plate in the second direction are each provided with a second guide groove extending along the second direction, and a second sliding portion adapted to the second guide groove is provided on the top of the second limiting member.

6. The busbar positioning tool for battery module welding according to any one of claims 1 to 5, characterized in that: The first limiting member and the second limiting member are both strip-shaped limiting blocks, and a guide slope is provided on the opposite inner side of the two first limiting members away from the insulating plate. A guide slope is also provided on the opposite inner side of the two second limiting members away from the insulating plate.

7. The busbar positioning tool for battery module welding according to any one of claims 1 to 5, characterized in that: The insulating plate is rectangular, the first direction corresponds to a length direction of the insulating plate, and the second direction corresponds to a width direction of the insulating plate.

8. The busbar positioning tool for battery module welding according to any one of claims 1 to 5, characterized in that: The multiple busbar positioning ports include a positive output busbar positioning port, a negative output busbar positioning port and several intermediate connecting busbar positioning ports. The positive output busbar positioning port and the negative output busbar positioning port are both located on the battery module at one end and extend to the outside of the battery module at the other end. The busbar positioning tool for battery module welding also includes two supporting assemblies. The two supporting assemblies are both installed on the lower surface of the insulating plate and are respectively located at one end of the positive output busbar positioning port and the negative output busbar positioning port away from the battery module. The two supporting assemblies are respectively used to support the buses placed in the positive output busbar positioning port and the negative output busbar positioning port.

9. The busbar positioning tool for battery module welding according to claim 8, characterized in that: The supporting assembly includes a base, a slider, a pull rod and an elastic member. The base is fixed to the lower surface of the insulating plate by screws. The slider is slidably arranged on the base. One end of the slider is provided with a wedge-shaped supporting surface, and the other end is connected to the pull rod. The elastic member is arranged between the slider and the base. Under the action of the elastic member, the end of the slider provided with the wedge-shaped supporting surface extends to the bottom of the positive output bus positioning port / the negative output bus positioning port away from the end of the battery module.

Images