CN209947938U

CN209947938U - Be applied to lithium ion battery's notes liquid hole gasket and annotate liquid seal structure

Info

Publication number: CN209947938U
Application number: CN201920473698.7U
Authority: CN
Inventors: 鞠林润; 邓海鹏; 贺文文; 刘成士; 李少凡
Original assignee: Hefei Guoxuan High Tech Power Energy Co Ltd
Current assignee: Hefei Gotion High Tech Power Energy Co Ltd
Priority date: 2019-04-09
Filing date: 2019-04-09
Publication date: 2020-01-14
Anticipated expiration: 2029-04-09

Abstract

The utility model discloses a be applied to lithium ion battery's notes liquid hole gasket is equipped with on the base plate and annotates the liquid recess, it is equipped with notes liquid hole to annotate liquid recess bottom, the gasket is located annotate in the liquid recess, the welding seal portion outer wall with annotate the cooperation of liquid recess inner wall, the thickness of welding seal portion with the degree of depth of annotating the liquid recess equals. Through the notes liquid hole gasket and annotate liquid seal structure of being applied to lithium ion battery of above-mentioned optimal design, the gasket top forms boss structure and bottom and forms holding tank structure, through with annotate the liquid recess cooperation on the base plate, on the one hand reduce and annotate liquid recess depth, welding seal portion and base plate top surface lie in the coplanar simultaneously, eliminate the step of welding position, can realize welded seal through taking the plane concatenation welding, make base plate structural design flatter, light weight, and guarantee the sealing reliability.

Description

Be applied to lithium ion battery's notes liquid hole gasket and annotate liquid seal structure

Technical Field

The utility model relates to a new forms of energy lithium electricity technical field especially relates to a be applied to lithium ion battery's notes liquid hole gasket and annotate liquid seal structure.

Background

At present, the new energy industry is developed vigorously, and the application environments of electric vehicles, energy storage systems, micro-grids and the like all put forward considerable requirements on the energy density and the reliability of batteries. The battery structural member is a main part system for ensuring various performances of the safety, reliability, durability and sealing performance of the battery core, is an implementation carrier of various electrical performances of the battery, and plays an increasingly important role in the battery core system.

The essential content of the most basic design of the battery structural member, and the most basic and important necessity of ensuring the performance of the battery core is the guarantee of the air tightness of the battery core, wherein the sealing of the liquid injection hole is a key item for guaranteeing the tightness, and the sealing is carried out on some small hard shell battery cores in a steel ball sealing mode, so that a new challenge is provided for the reliability of the sealing mode along with the increase of energy density.

SUMMERY OF THE UTILITY MODEL

For the technical problem who exists among the solution background art, the utility model provides a be applied to lithium ion battery's notes liquid hole gasket.

The utility model provides a be applied to lithium ion battery's notes liquid hole gasket, the gasket is equipped with the cover portion and centers on the welding sealing of cover portion extension, cover portion bottom is equipped with the holding tank, the cover portion top is followed the welding sealing top surface is upwards protruding.

Preferably, the sealing plate is made of an aluminum sheet.

Preferably, the welding sealing part top protrusion is arranged corresponding to the covering part bottom accommodating groove.

The invention also provides a liquid injection sealing assembly applied to the lithium ion battery, which is characterized by comprising the following components: a base plate and the sealing sheet described above.

Preferably, be equipped with on the base plate and annotate the liquid recess, it is equipped with annotates the liquid hole to annotate liquid recess bottom, the gasket is located annotate in the liquid recess, the welding seal portion outer wall with annotate the cooperation of liquid recess inner wall, the thickness of welding seal portion with the degree of depth of annotating the liquid recess equals.

Preferably, the accommodating groove at the bottom of the sealing sheet corresponds to the liquid injection hole in the base plate.

Preferably, a sealing bead is arranged in the liquid injection hole.

Preferably, the sealing bead is made of steel balls or rubber plugs.

Preferably, the outer diameter of the welding seal portion is gradually reduced from top to bottom.

The utility model discloses in, the notes liquid hole gasket and annotate liquid seal structure of being applied to lithium ion battery that provide is equipped with on the base plate and annotates the liquid recess, it is equipped with notes liquid hole to annotate liquid recess bottom, the gasket is located annotate in the liquid recess, the welding sealing portion outer wall with annotate the cooperation of liquid recess inner wall, the thickness of welding sealing portion with the degree of depth of annotating the liquid recess equals. Through the notes liquid hole gasket and annotate liquid seal structure of being applied to lithium ion battery of above-mentioned optimal design, the gasket top forms boss structure and bottom and forms holding tank structure, through with annotate the liquid recess cooperation on the base plate, on the one hand reduce and annotate liquid recess depth, welding seal portion and base plate top surface lie in the coplanar simultaneously, eliminate the step of welding position, can realize welded seal through taking the plane concatenation welding, make base plate structural design flatter, light weight, and guarantee the sealing reliability.

Drawings

Fig. 1 is the utility model provides a be applied to the structure schematic diagram of lithium ion battery's notes liquid hole gasket.

Fig. 2 is the utility model provides a be applied to lithium ion battery's notes liquid seal structure's structural schematic.

Detailed Description

As shown in fig. 1 and 2, fig. 1 is the utility model provides a be applied to the structural schematic diagram of lithium ion battery's notes liquid hole gasket, fig. 2 is the utility model provides a be applied to lithium ion battery's notes liquid seal structure's structural schematic diagram.

Referring to fig. 1, the utility model provides a be applied to lithium ion battery's notes liquid hole gasket, gasket 1 is equipped with cover portion 11 and centers on the welding sealing portion 12 that cover portion 11 extends, cover portion 11 bottom is equipped with the holding tank, cover portion 11 top is followed welding sealing portion 12 top is upwards protruding.

In the specific material selection of the sealing piece, the sealing piece 1 is made of an aluminum sheet, so that the light weight and the sealing property are ensured.

In a specific embodiment, the top projection of the welding sealing part 12 is arranged corresponding to the bottom accommodating groove of the covering part 11; thereby ensuring the compressive strength of the whole sealing sheet.

Referring to fig. 2, the present embodiment further provides an electrolyte injection sealing assembly applied to a lithium ion battery, including: a base plate 2 and the sealing sheet 1.

In a specific matching mode, a liquid injection groove is formed in the base plate 2, a liquid injection hole is formed in the bottom of the liquid injection groove, the sealing sheet 1 is located in the liquid injection groove, the outer wall of the welding sealing part 12 is matched with the inner wall of the liquid injection groove, and the thickness of the welding sealing part 12 is equal to the depth of the liquid injection groove; the welding seam is positioned on the plane of the surface of the substrate, so that the welding is convenient and the sealing reliability after welding is ensured.

In a specific design, the accommodating groove at the bottom of the sealing sheet 1 corresponds to the liquid injection hole in the base plate 2.

In order to improve the sealing performance, a sealing bead 3 is arranged in the liquid injection hole, secondary sealing is arranged, and the sealing reliability is improved.

In the choice of the sealing bead, the sealing bead 3 is made of steel ball or rubber plug.

In other embodiments, the welded seal portion 12 has an outer diameter that decreases from top to bottom to facilitate the mounting of the sealing sheet on the cover plate.

In the specific installation process of the sealing sheet on the cover plate, after liquid injection is completed, a primary sealing device of a liquid injection hole, such as a steel ball or a rubber plug, is sealed to the position of the liquid injection hole to complete primary sealing; then, wiping or laser cleaning the position of the liquid injection groove which is sealed once; and finally, placing the sealing sheet in the liquid injection groove, and performing laser welding along the matched edge to finish secondary sealing.

In this embodiment, what provide is applied to lithium ion battery annotates liquid hole gasket and annotates liquid seal structure is equipped with on the base plate and annotates the liquid recess, it is equipped with annotates the liquid hole to annotate liquid recess bottom, the gasket is located annotate in the liquid recess, welding sealing portion outer wall with annotate the cooperation of liquid recess inner wall, welding sealing portion's thickness with the degree of depth that annotates the liquid recess equals. Through the notes liquid hole gasket and annotate liquid seal structure of being applied to lithium ion battery of above-mentioned optimal design, the gasket top forms boss structure and bottom and forms holding tank structure, through with annotate the liquid recess cooperation on the base plate, on the one hand reduce and annotate liquid recess depth, welding seal portion and base plate top surface lie in the coplanar simultaneously, eliminate the step of welding position, can realize welded seal through taking the plane concatenation welding, make base plate structural design flatter, light weight, and guarantee the sealing reliability.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. The sealing sheet for the liquid injection hole of the lithium ion battery is characterized in that the sealing sheet (1) is provided with a covering part (11) and a welding sealing part (12) extending around the covering part (11), the bottom of the covering part (11) is provided with a containing groove, and the top of the covering part (11) protrudes upwards from the top surface of the welding sealing part (12).

2. The sealing plate for liquid injection holes of lithium ion batteries according to claim 1, wherein the sealing plate (1) is made of aluminum sheet.

3. The sealing plate for liquid injection holes applied to lithium ion batteries according to claim 1, characterized in that the top projection of the welded sealing part (12) is arranged corresponding to the bottom receiving groove of the covering part (11).

4. The utility model provides a be applied to annotate liquid seal structure of lithium ion battery which characterized in that includes: a base plate (2) and a sealing disc (1) according to any of claims 1 to 3.

5. The liquid injection sealing structure applied to the lithium ion battery according to claim 4, wherein a liquid injection groove is formed in the substrate (2), a liquid injection hole is formed in the bottom of the liquid injection groove, the sealing sheet (1) is located in the liquid injection groove, the outer wall of the welding sealing part (12) is matched with the inner wall of the liquid injection groove, and the thickness of the welding sealing part (12) is equal to the depth of the liquid injection groove.

6. The liquid injection sealing structure applied to the lithium ion battery is characterized in that the accommodating groove at the bottom of the sealing sheet (1) corresponds to the liquid injection hole on the base plate (2).

7. The liquid injection sealing structure applied to the lithium ion battery is characterized in that sealing beads (3) are arranged in the liquid injection hole.

8. The liquid injection sealing structure applied to the lithium ion battery is characterized in that the sealing beads (3) are steel balls or rubber plugs.

9. The liquid injection sealing structure applied to the lithium ion battery according to claim 5, wherein the outer diameter of the welded sealing part (12) is gradually reduced from top to bottom.