CN210006857U

CN210006857U - Sealing performance detection mechanism of lithium battery shell

Info

Publication number: CN210006857U
Application number: CN201921015658.4U
Authority: CN
Inventors: 钱胜利; 杨茜; 华春忠; 孙华申
Original assignee: Wuxi Mingyang New Energy Co Ltd
Current assignee: Wuxi Mingyang New Energy Co ltd
Priority date: 2019-07-02
Filing date: 2019-07-02
Publication date: 2020-01-31
Anticipated expiration: 2029-07-02

Abstract

The utility model discloses a leakproofness detection mechanism of kind of lithium cell shell, including fixed subassembly, determine module and air supply, determine module includes gas needle and manometer, and gas needle and manometer and air supply three pass through the pipe intercommunication, and the gas needle setting is in fixed subassembly department, and the gas needle is embedded into the casing, and fixed subassembly is fixed with the casing, opens the air supply, and gas is inflated toward the casing in, and the gas pressure in the casing shows on the manometer, the utility model discloses can detect lithium cell casing's leakproofness fast, improve the inspection rate of product, reduce the production of bad product, the utility model discloses can keep the leakproofness between gas needle and the casing, guarantee the measuring accuracy.

Description

Sealing performance detection mechanism of lithium battery shell

Technical Field

The utility model relates to a lithium battery detection equipment, in particular to leakproofness detection mechanism of kinds of lithium battery shell.

Background

Among all energy forms, electric energy is the easiest to use, the cleanest and most environmentally friendly energy with the highest efficiency, a battery is the best device for storing electric energy, among all battery products, a lithium battery is the youngest and most advanced energy product in the world at present with the highest technical gold content and the largest energy density, and the lithium battery has the advantages of wide working stability range, stable discharge voltage, low self-discharge rate, long service life and the like, and is widely applied to various fields, particularly the fields of aerospace, military, long-life instruments and meters, logistics tracking, cycling automobile electronics, mobile digital products and the like by .

The lithium battery comprises a shell, a lithium battery object sealed in the shell and a cap, wherein the cap not only serves as a discharge end of the lithium battery, but also needs to be used for sealing the lithium battery. If the block can not sealed the casing and can cause the lithium cell to get into gas in the casing when charge-discharge, lead to the casing lithium cell to produce and rock even accelerate the oxidation and produce and reveal.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a leakproofness detection mechanism of kinds of lithium cell shells detects the leakproofness between lithium cell shell and the lid.

The technical scheme is as follows: the utility model discloses a tightness detection mechanism of a lithium battery shell, which comprises a fixing component, a detection component and an air source; the detection component comprises a gas needle and a pressure gauge, the gas needle, the pressure gauge and a gas source are communicated through a pipe, the gas needle is arranged at the fixed component, the gas needle is embedded into the shell, the shell is fixed by the fixed component, the gas source is opened, gas is inflated into the shell, and the gas pressure in the shell is displayed on the pressure gauge.

By adopting the technical scheme, the shell is placed at the fixed component, the air hole of the shell is right opposite to the air needle, and the air needle is embedded into the shell through the air hole; then the fixing component fixes the shell, the gas source is opened, gas enters the shell through the pipe and the gas needle, then the pointer of the pressure gauge is observed, when the pointer of the pressure gauge reaches a standard value, the tightness of the shell reaches the requirement, and the shell belongs to a qualified product; when the pointer of the pressure gauge does not reach the standard value, the shell tightness is not required, and the pressure gauge belongs to an unqualified product

Has the advantages that: the utility model can rapidly detect the sealing performance of the lithium battery shell, improve the inspection rate of products and reduce the generation of defective products; the utility model discloses can keep the leakproofness between gas needle and the casing, guarantee the measuring accuracy.

Drawings

Fig. 1 is a schematic structural view of a sealing performance detection mechanism of a lithium battery case.

Detailed Description

As shown in fig. 1, the sealing performance detection mechanism for lithium battery cases comprises a fixing assembly 1, a detection assembly 2 and an air source 3.

The fixing assembly 1 comprises a fixed block 11, a movable block 12, a connecting block 13 and a screw rod 14, wherein semicircular grooves for fixing a shell are formed in the fixed block 11 and the movable block 12, the movable block 12 and the fixed block 11 are arranged in an opposite mode, the movable block 12 can move towards or away from the fixed block 11, the connecting block 13 is arranged in an opposite mode to the movable block 12, the connecting block 13 is connected with the screw rod 14 in a rotating mode, the screw rod 14 end acts on the movable block 12, the screw rod 14 rotates, the movable block 12 is driven to be close to the fixed block 11 by the screw rod 14, and the movable block 12 and the fixed block 11.

The fixed block 11 is provided with a movable resetting component 4, the movable block 12 moves along a straight line by the movable resetting component 4, and when the screw rod 14 does not act on the movable block 12, the movable resetting component 4 drives the movable block 12 to reset.

The moving return assembly 4 includes pairs of posts 41 and a spring 42 nested on the posts 41, the posts 41 extend through and out of the movable block 12, and the return spring 42 is located between the fixed block 11 and the movable block 12.

The detection component 2 comprises a gas needle 21 and a pressure gauge 22, the gas needle 21, the pressure gauge 22 and a gas source 3 are communicated through a pipe, the gas needle 21 is arranged at the fixed component 1, the gas needle 21 is embedded into the shell, the shell is fixed by the fixed component 1, the gas source 3 is opened, gas is inflated into the shell, and the gas pressure in the shell is displayed on the pressure gauge 22.

The air needle 21 penetrates through the fixed block 11 and extends into the semicircular groove of the fixed block 11, an elastic block 5 (not shown in the figure) is arranged on the air needle 21, and the elastic block 5 is used for sealing an air hole formed by embedding the air needle 21 into the shell.

The working process is as follows: the shell is placed in a semicircular groove of the fixed block 11, the air needle 21 is embedded into an air hole of the shell, the screw rod 14 is driven to rotate, the screw rod 14 is driven to push the movable block 12 to move towards the fixed block 11 along the column 41, and when the shell is contacted with the elastic block 5, the screw rod 14 stops rotating; the gas source 3 is opened, gas enters the shell through the pipe and the gas needle 21, then the pointer of the pressure gauge 22 is observed, when the pointer of the pressure gauge 22 reaches a standard value, the tightness of the shell reaches the requirement, and the shell belongs to a qualified product; when the pointer of the pressure gauge 22 does not reach the standard value, the shell tightness does not meet the requirement, and the shell is an unqualified product. And (3) closing the air source 3, reversely rotating the screw rod 14, elastically resetting the spring 42, pushing the movable block 12 to reversely move along the cylinder 41, removing the shell when the reset spring 42 does not push the cylinder 41 to move, carrying out a new shell sealing test, and repeating the steps.

In order to better display the test result, alcohol can be coated on the cap, when the cap is not well sealed, the alcohol generates a bubbling phenomenon, and when the cap is in a sealed state, the alcohol does not generate any phenomenon.

Claims

The tightness detection mechanism of the lithium battery shells is characterized by comprising a fixing assembly (1), a detection assembly (2) and a gas source (3), wherein the detection assembly (2) comprises a gas needle (21) and a pressure gauge (22), the gas needle (21), the pressure gauge (22) and the gas source (3) are communicated through a pipe, the gas needle (21) is arranged at the fixing assembly (1), the gas needle (21) is embedded into the shell, the shell is fixed by the fixing assembly (1), the gas source (3) is opened, gas is inflated into the shell, and the pressure of the gas in the shell is displayed on the pressure gauge (22).
2. The tightness detection mechanism of the lithium battery shell according to claim 1, characterized in that the fixing assembly (1) comprises a fixing block (11), a movable block (12), a connecting block (13) and a screw rod (14), wherein semi-circular grooves for fixing the shell are formed in the fixing block (11) and the movable block (12), the movable block (12) and the fixing block (11) are arranged in an aligned manner, the movable block (12) can move towards or away from the fixing block (11), a gas needle (21) penetrates through the fixing block (11) and extends into the semi-circular groove of the fixing block (11), the connecting block (13) is arranged in an aligned manner with the movable block (12), the connecting block (13) is rotatably connected with the screw rod (14), the screw rod (14) end acts on the movable block (12), the screw rod (14) rotates, the screw rod (14) drives the movable block (12) to be close to the fixing block (11), and the movable block (12) and the fixing block (11).
3. The tightness detection mechanism of a lithium battery case according to claim 1, characterized in that a movable reset assembly (4) is disposed on the fixed block (11), the movable reset assembly (4) is used for the movable block (12) to move along a straight line, and when the lead screw (14) does not act on the movable block (12), the movable reset assembly (4) drives the movable block (12) to reset.
4. The tightness detection mechanism of a lithium battery shell according to claim 3, characterized in that the movable reset assembly (4) comprises pairs of posts (41) and springs (42) nested on the posts (41), the posts (41) penetrate and extend out of the movable block (12), and the reset springs (42) are located between the fixed block (11) and the movable block (12).
5. The tightness detection mechanism of the lithium battery shell according to claim 2, characterized in that the air pin (21) is provided with an elastic block (5), and the elastic block (5) is used for sealing an air hole in the shell, into which the air pin (21) is inserted.