CN210587726U

CN210587726U - Laser welding tool for battery module

Info

Publication number: CN210587726U
Application number: CN201921283714.2U
Authority: CN
Inventors: 余增轩; 李永通; 敖长宣
Original assignee: Zhuhai Kechuang Power Electronics Co Ltd
Current assignee: Zhuhai Kechuang Power Electronics Co Ltd
Priority date: 2019-08-08
Filing date: 2019-08-08
Publication date: 2020-05-22
Anticipated expiration: 2029-08-08

Abstract

The utility model relates to the technical field of battery manufacturing, in particular to a laser welding tool of a battery module, which comprises a base and a cover plate component, the base and the cover plate component are respectively provided with opposite guide posts, the battery module is placed on the base, the cover plate component can be downwards pressed and connected with the battery module along the axial direction of the guide posts, the cover plate component comprises a mounting plate, a glass fiber plate, an insulating partition plate and a pressure head which are sequentially arranged on the mounting plate, the pressure head is provided with a welding through hole and a nitrogen blow-off channel which is inclined at one side or two sides of the welding through hole, the battery module is tightly pressed on the base by the downward pressing of the cover plate component, set up the nitrogen gas of slope and blow off the passageway in one side or both sides of welding port, nitrogen gas can blow off the passageway accuracy from nitrogen gas and blow to the welding point department, plays stable welding guard action and avoids welding waste to damage lens.

Description

Laser welding tool for battery module

Technical Field

The utility model relates to a battery manufacturing technology field, concretely relates to laser welding frock of battery module.

Background

The battery module is a plurality of PACKs formed by connecting several to hundreds of battery cores in parallel and in series, and a more complete battery PACK system can be formed by the battery management system and the thermal management system except for the mechanism design part. In the production process of the energy storage battery, a plurality of single batteries are required to be welded into a battery module, and the use of the battery module can increase the electric storage capacity of the battery and meet the daily use requirement; most of the existing laser welding modules have poor base material bonding quality, and the poor phenomenon that lenses are damaged by cold welding and welding waste materials due to unreasonable design of a nitrogen gas outlet, so that the welding quality is difficult to control.

SUMMERY OF THE UTILITY MODEL

The utility model aims to at least solve one of the technical problems in the prior art, and provides a laser welding tool for a battery module, which comprises a base and a cover plate component, the base and the cover plate component are respectively provided with opposite guide posts, the battery module is placed on the base, the cover plate component can be downwards pressed and connected with the battery module along the axial direction of the guide posts, the cover plate component comprises a mounting plate, a glass fiber plate, an insulating partition plate and a pressure head which are sequentially arranged on the mounting plate, the pressure head is provided with a welding through hole and a nitrogen blow-off channel which is inclined at one side or two sides of the welding through hole, the battery module is tightly pressed on the base by the downward pressing of the cover plate component, set up the nitrogen gas of slope and blow off the passageway in one side or both sides of welding port, nitrogen gas can blow off the passageway accuracy from nitrogen gas and blow to the welding point department, plays stable welding guard action and avoids welding waste to damage lens.

As the further improvement of above-mentioned scheme, the welding opening is the back taper platform shape, and its aim at is dodged the welding rifle for the welding rifle has sufficient operating space, avoids pressure head and welding rifle to produce and interferes.

As a further improvement of the above scheme, the lower end of the welding through opening extends to form a blocking part, and the purpose of the blocking part is to prevent welding scraps from splashing to influence the quality of the battery module.

As the further improvement of above-mentioned scheme, one side of stopping part is provided with the welding opening, and its aim at dodges welding gun contact welding point, guarantees welded accuracy and stability.

As a further improvement of the scheme, the nitrogen blowing channel is a linear channel, and the purpose of the nitrogen blowing channel is to ensure that nitrogen is blown out quickly to protect welding points and avoid poor welding and other phenomena.

As the further improvement of the scheme, the pressure head is provided with a plurality of pressure heads arranged on the insulating partition plate, and the purpose is that the welding tool can realize array welding, can weld a plurality of battery modules simultaneously, and improves the welding efficiency.

As the further improvement of above-mentioned scheme, be provided with chucking structure on the guide post, its aim at guarantees the crimping stability of the relative battery module of apron subassembly, guarantees that the welding point on the battery module contacts well, promotes welding quality.

As a further improvement of the scheme, the air outlet of the nitrogen blowing channel is arranged close to the lower end of the welding through hole.

As a further improvement of the above scheme, the nitrogen gas blow-off channel is 35 to 55 degrees relative to the axial direction of the welding port, and the purpose of the nitrogen gas blow-off channel is to ensure that the nitrogen gas blow-off channel can accurately blow the nitrogen gas to the welding point, so as to improve the welding quality.

Drawings

The present invention will be further described with reference to the accompanying drawings and examples;

fig. 1 is an assembly schematic view of a welding tool according to an embodiment of the present invention;

fig. 2 is a three-dimensional side view of a cover plate assembly according to an embodiment of the present invention;

figure 3 is a three-dimensional side view of an indenter according to embodiments of the present invention;

figure 4 is a three-dimensional cross-sectional view of an indenter according to an embodiment of the present invention.

Detailed Description

This section will describe in detail the embodiments of the present invention, preferred embodiments of the present invention are shown in the attached drawings, which are used to supplement the description of the text part of the specification with figures, so that one can intuitively and vividly understand each technical feature and the whole technical solution of the present invention, but they cannot be understood as the limitation of the protection scope of the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does 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 thus, should not be construed as limiting the present invention.

In the description of the present invention, a plurality of means are one or more, a plurality of means are two or more, and the terms greater than, less than, exceeding, etc. are understood as not including the number, and the terms greater than, less than, within, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.

As shown in fig. 1 to 4, a laser welding tool for battery modules includes a base 1 and a cover plate assembly, where the base 1 is provided with a positioning hole and/or a positioning pin and/or a positioning groove to ensure the relative position of a battery module 7 on a bottom plate, the bottom plate and the cover plate assembly are respectively provided with opposite guide posts, the opposite end surfaces of the base 1 and the cover plate assembly are respectively provided with four guide posts, and the guide posts are further provided with a clamping structure 6, in this embodiment, the clamping structure 6 may be a conventional quick caliper structure, that is, the guide posts of the base 1 are provided with quick calipers, the guide posts of the cover plate assembly are provided with slots matched with the quick calipers, the battery module 7 is placed on the base 1, and the cover plate assembly is pressed against the battery module 7 downwards along the axial direction of the guide posts, the guide post on the base 1 corresponds with the guide post on the apron subassembly this moment, closes quick calliper again and in order the joint to the draw-in groove, guarantees to lap the position of apron subassembly and base 1 fixed mutually in order to stabilize the crimping between base 1 and apron subassembly with battery module 7, guarantees that battery module 7 is fixed motionless in welding process, ensures welding quality.

As shown in fig. 2 to 4, the cover plate assembly includes a mounting plate 2, and a glass fiber plate 3, an insulating partition plate 4, and a pressure head 5 sequentially disposed on the mounting plate 2, wherein the glass fiber plate 3 plays a role of heat insulation and flame retardation, specifically, waist-shaped holes capable of allowing a welding gun to pass through are disposed on the mounting plate 2, the glass fiber plate 3, and the insulating partition plate 4, and the pressure head 5 is provided with a welding through hole 51 and a nitrogen blow-out channel 52 obliquely disposed on one side or both sides of the welding through hole 51, so that the welding gun can sequentially pass through the mounting plate 2, the glass fiber plate 3, the insulating partition plate 4, and the welding through hole 51 to weld the battery module 7; it should be noted that the glass fiber plate 3 may be fixedly mounted on the mounting plate 2 in a threaded connection or a bolt connection manner, the insulating partition plate 4 may be fixedly mounted on the mounting plate 2 or the glass fiber plate 3 in a threaded connection or a bolt connection manner, and the pressing head 5 is fixedly mounted on the insulating partition plate 4 in a threaded connection manner.

As a further improvement of the above-mentioned scheme, as shown in fig. 3 and 4, the welding through hole 51 is in an inverted frustum shape, the lower end of the welding through hole 51 in the inverted frustum shape extends to form a blocking portion 53, the blocking portion 53 is in a square shape, one side of the blocking portion 53 is provided with a welding opening 54, the welding opening 54 can be arranged on the left side, the right side, the front side or the rear side of the blocking portion 53 according to actual conditions, during welding, a welding gun can extend into the welding through hole 51 and perform welding operation at the welding opening 54, and welding waste materials are led into the blocking portion 53 to block, so that the welding waste materials cannot splash onto the adjacent battery modules 7 or fall into the battery modules 7, and accidents such as short circuit of the battery modules 7 caused by the splashed waste materials are avoided.

As a further improvement of the above scheme, as shown in fig. 2, the indenter 5 has a plurality of indenters 5 disposed on the insulating spacer 4, in this embodiment, the indenters 5 are set by 12, and two sets of indenters are disposed on the insulating spacer 4, and the array welding of the battery modules is realized by matching with the array welding equipment, so that the welding efficiency is improved.

As a further improvement of the above solution, as shown in fig. 3 and 4, the nitrogen gas blowing channel 52 is a linear channel, the gas inlet of the nitrogen gas blowing channel 52 is disposed near the lower end of the welding through hole 51, and further, the gas outlet of the nitrogen gas blowing channel 52 is disposed toward the welding opening 54, and preferably, the nitrogen gas blowing channel 52 is a linear channel, which is aimed at reducing the processing difficulty, ensuring that nitrogen gas is blown out quickly to protect the welding point, and avoiding poor welding and other phenomena; furthermore, the nitrogen gas blowing channel 52 is arranged at an angle of 35 ° to 55 °, preferably 45 °, relative to the axial direction of the welding port 51, so as to ensure that the nitrogen gas blowing channel 52 can accurately blow nitrogen gas to the welding point, thereby improving the welding quality.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the gist of the present invention within the knowledge range of those skilled in the art.

Claims

1. The utility model provides a laser welding frock of battery module, a serial communication port, including base (1) and apron subassembly, base (1) and be provided with relative guide post on the apron subassembly respectively, battery module (7) are placed on base (1), and the axis direction crimping battery module (7) down that the guide post can be followed to the apron subassembly, the apron subassembly is including mounting panel (2) and glass fiber board (3), insulating barrier (4), pressure head (5) that set gradually on mounting panel (2), be provided with welding opening (51) and slope on pressure head (5) and blow out passageway (52) at the nitrogen gas of welding opening (51) one side or both sides.

2. The laser welding tool for battery modules according to claim 1, wherein the welding through-hole (51) is in the shape of an inverted frustum.

3. The laser welding tool for battery modules according to claim 2, wherein a blocking portion (53) extends from the lower end of the welding through opening (51).

4. The laser welding tool for battery modules according to claim 3, wherein one side of the blocking part (53) is provided with a welding opening (54).

5. The laser welding tool for battery modules as claimed in claim 1, wherein the nitrogen blow-off channel (52) is a straight channel.

6. The laser welding tool for battery modules as claimed in claim 1, wherein the indenter (5) has a plurality of indenters disposed on the insulating spacer (4).

7. The laser welding tool for battery modules as claimed in claim 1, wherein the guide post is provided with a clamping structure (6).

8. The laser welding tool for battery modules according to claim 1, wherein the outlet of the nitrogen gas blow-out passage (52) is disposed near the lower end of the welding through opening (51).

9. The laser welding tool for battery modules according to claim 8, wherein the nitrogen gas blow-off channel (52) is at an angle of 35 ° to 55 ° with respect to the axial direction of the welding port (51).