CN213916640U

CN213916640U - Welding slag preventing jig for lithium battery laser welding cap

Info

Publication number: CN213916640U
Application number: CN202022914200.1U
Authority: CN
Inventors: 王钢; 曹汉标
Original assignee: Jiangxi Dbk Corp Co ltd
Current assignee: Jiangxi Dbk Corp Co ltd
Priority date: 2020-12-08
Filing date: 2020-12-08
Publication date: 2021-08-10
Anticipated expiration: 2030-12-08

Abstract

The utility model relates to a lithium cell laser welding block prevents welding slag tool, including the tool body, be equipped with central channel on the tool body, the tip of tool body is equipped with the front end boss, be equipped with on the front end boss with the front end centre bore of central channel intercommunication, be equipped with inert gas interface and the vacuum pipe interface with central channel intercommunication on the tool body; the inert gas interface is hermetically connected with an inert gas pipeline, and the vacuum pipeline interface is hermetically connected with a vacuum pump through a vacuum adsorption pipeline. Because of the inside negative pressure effect of central passage, the welding slag that produces will be moved to central passage by the flaring position and get into the vacuum adsorption pipeline and collect, can effectually prevent that the welding slag from splashing and make it have the possibility that gets into electric core inside.

Description

Welding slag preventing jig for lithium battery laser welding cap

Technical Field

The utility model relates to a laser welding prevents welding slag tool, especially a lithium cell laser welding block prevents welding slag tool.

Background

Along with lithium cell automated production process degree is higher and higher, more and more enterprises all use electric core to annotate earlier in the production process and carry out the laser welding block process again, but must have electrolyte to remain on the process electric core that annotates earlier and the utmost point ear that the block links to each other, can all carry out the process that utmost point ear cleaned after annotating the liquid usually, but this process can't 100% get rid of electrolyte and remain, and when having electrolyte to remain on the utmost point ear, laser welding block makes utmost point ear and block looks welded in-process will higher probability produce welding slag (also have the production of welding slag when not having electrolyte to remain), the process that welding slag splashes makes welding slag have the risk that falls into electric core inside, welding slag is the metallics, very easily arouse security problems such as the ignition explosion of electric core when existing in electric core inside, consequently must 100% stop. For solving above problem, this patent has designed a lithium cell laser welding block and has prevented welding slag tool.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the defects of the prior art and providing a welding slag preventing jig for a lithium battery laser welding cap.

In order to realize the purpose, the utility model discloses a technical scheme as follows:

a welding slag preventing jig for a lithium battery laser welding cap comprises a jig body, wherein a central channel is arranged on the jig body, a front end boss is arranged at the end part of the jig body, a front end central hole communicated with the central channel is formed in the front end boss, and an inert gas interface and a vacuum pipeline interface which are communicated with the central channel are arranged on the jig body;

the inert gas interface is hermetically connected with the inert gas pipeline, the vacuum pipeline interface is hermetically connected with the vacuum pump through the vacuum adsorption pipeline, the central channel is kept in an inert gas environment, and welding slag can be effectively reduced during laser welding. The vacuum pump adsorbs welding slag which may exist, the inert gas supplied by the inert gas pipeline is nitrogen or argon, and the vacuum suction flow of the vacuum pump is larger than the inert gas flow.

Further, the inert gas interface and the vacuum pipeline interface are respectively positioned at the upper side and the lower side of the jig body.

Furthermore, a flaring is arranged at the joint of the central passage and the front end central hole, and the angle of the flaring is 30-60 degrees.

Further, when the cap is welded with the lug, the surface of the front-end boss is in close contact with the lug, the diameter of the front-end center hole is smaller than 70% of the width of the lug, and the diameter of the front-end center hole is actually controlled to be 2-8 mm. The diameter of the central channel is within 40mm, and the length is more than 25 mm.

Furthermore, the central channel is a laser channel and a welding slag collecting channel.

Further, this body coupling fixed plate of tool is equipped with the set screw interface on the fixed plate, wears to establish set screw in the set screw interface, and set screw connects buffer spring.

The utility model has the advantages that: when block and utmost point ear welding, inert gas pipeline and vacuum pump are in normally open state, the tool body removes, the surface and the utmost point ear in close contact with of front end boss, and make utmost point ear lean on block welding plane, front end boss border position and utmost point ear laminating, laser passes through central channel and welds utmost point ear welding at block welding plane, this process has the welding slag to produce if, because of the inside negative pressure of central channel, the welding slag of production will be got into the vacuum adsorption pipeline by flaring position motion to central channel and collect, can effectually prevent that the welding slag from splashing and make it have the possibility that gets into electric core inside. The welding slag prevention jig is simple in overall structure and easy to machine and replace; the device can be connected with an automatic welding machine for use, and has small volume and small occupied space; the filling of the inert gas can effectively reduce the generation of welding slag, the sealing performance of the structure and the connection of the vacuum pipeline can effectively absorb the welding slag which is possibly generated, and the possibility that the welding slag falls into the battery cell below the lug is reduced to zero.

Drawings

Fig. 1 is a schematic structural view of the present invention;

fig. 2 is a schematic side view of the present invention.

Detailed Description

As shown in fig. 1 and 2, the welding slag preventing jig for the laser welding cap of the lithium battery comprises a jig body 1, wherein a central channel 2 is arranged on the jig body 1, a front end boss 3 is arranged at the end part of the jig body 1, a front end central hole 4 communicated with the central channel 2 is arranged on the front end boss 3, an inert gas interface 5 and a vacuum pipeline interface 6 communicated with the central channel 2 are arranged on the jig body 1, and the central channel 2 is a laser channel and a welding slag collecting channel;

the inert gas interface 5 is hermetically connected with an inert gas pipeline, the vacuum pipeline interface 6 is hermetically connected with a vacuum pump through a vacuum adsorption pipeline, the central channel 2 is kept in an inert gas environment, and welding slag can be effectively reduced during laser welding. The vacuum pump adsorbs welding slag which may exist, the inert gas supplied by the inert gas pipeline is nitrogen or argon, and the vacuum suction flow of the vacuum pump is larger than the inert gas flow.

Wherein, the inert gas interface 5 and the vacuum pipeline interface 6 are respectively positioned at the upper side and the lower side of the jig body 1.

The joint of the central channel 2 and the front end central hole 4 is provided with a flaring 7, and the angle of the flaring 7 is 30-60 degrees.

Further, when the cap is welded with the lug, the surface of the front-end boss 3 is in close contact with the lug, the diameter of the front-end center hole 4 is smaller than 70% of the width of the lug, and the diameter of the front-end center hole 4 is actually controlled to be 2-8 mm. The diameter of the central channel is within 40mm, and the length is more than 25 mm.

Further, the fixture body 1 is connected with a fixing plate 8, a fixing screw interface 9 is arranged on the fixing plate 8, a fixing screw is arranged in the fixing screw interface 9 in a penetrating mode, the fixing screw is connected with a buffer spring, and the front end boss 3 of the fixture is effectively contacted with the lug and is not prone to crushing the nut cap.

When block and utmost point ear welding, inert gas pipeline and vacuum pump are in normally open state, tool body 1 removes, the surface and the utmost point ear in close contact with of front end boss 3, and make utmost point ear lean on block welding plane, 3 border position of front end boss and utmost point ear laminating, laser passes through central channel 2 and welds utmost point ear at block welding plane, this process has the welding slag to produce if, because of the inside negative pressure effect of central channel 2, the welding slag of production will be got into the vacuum adsorption pipeline by 7 position movements of flaring to central channel 3 and collect, can effectually prevent to weld the slag and splash and make it have the possibility that gets into electric core inside. The welding slag prevention jig is simple in overall structure and easy to machine and replace; the device can be connected with an automatic welding machine for use, and has small volume and small occupied space; the filling of the inert gas can effectively reduce the generation of welding slag, the sealing performance of the structure and the connection of the vacuum pipeline can effectively absorb the welding slag which is possibly generated, and the possibility that the welding slag falls into the battery cell below the lug is reduced to zero.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the principles of the present invention may be applied to any other embodiment without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. A welding slag preventing jig for a laser welding cover cap of a lithium battery comprises a jig body and is characterized in that a central channel is arranged on the jig body, a front end boss is arranged at the end part of the jig body, a front end central hole communicated with the central channel is formed in the front end boss, and an inert gas interface and a vacuum pipeline interface which are communicated with the central channel are arranged on the jig body;

the inert gas interface is hermetically connected with an inert gas pipeline, and the vacuum pipeline interface is hermetically connected with a vacuum pump through a vacuum adsorption pipeline.

2. The welding slag preventing jig for the laser welding caps of the lithium batteries as claimed in claim 1, wherein the inert gas interface and the vacuum pipeline interface are respectively positioned at the upper side and the lower side of the jig body.

3. The welding slag preventing jig for the laser welding caps of the lithium batteries according to claim 2, wherein a flaring is arranged at the joint of the central channel and the central hole at the front end, and the angle of the flaring is 30-60 degrees.

4. The welding slag preventing jig for the laser welding cap of the lithium battery as claimed in claim 3, wherein when the cap is welded with the tab, the surface of the front boss is in close contact with the tab, and the diameter of the front center hole is less than 70% of the width of the tab.

5. The welding slag preventing jig for the lithium battery laser welding cap according to claim 3, wherein the central channel is a laser channel and a welding slag collecting channel.

6. The welding slag preventing jig for the laser welding caps of the lithium batteries as claimed in claim 3, wherein the inert gas supplied by the inert gas pipeline is nitrogen or argon, and the vacuum suction flow rate of the vacuum pump is greater than the inert gas flow rate.

7. The welding slag preventing jig for the laser welding caps of the lithium batteries as claimed in claim 3, wherein the jig body is connected with a fixing plate, a fixing screw joint is arranged on the fixing plate, a fixing screw penetrates through the fixing screw joint, and the fixing screw is connected with a buffer spring.