CN211530065U

CN211530065U - Anti-backflow formation joint for aluminum-shell battery

Info

Publication number: CN211530065U
Application number: CN202020615056.9U
Authority: CN
Inventors: 张巧灵; 张宝华; 娄勇刚
Original assignee: Camel Group Wuhan New Energy Technology Co ltd
Current assignee: Camel Group New Energy Battery Co Ltd
Priority date: 2020-04-22
Filing date: 2020-04-22
Publication date: 2020-09-18
Anticipated expiration: 2030-04-22

Abstract

An anti-backflow formation joint for an aluminum-shell battery comprises a sucker, a first air pipe, a cavity and a second air pipe which are sequentially connected from bottom to top; the sucking disc is internally provided with a central through hole, the lower end part of the sucking disc is tightly adsorbed on the periphery of a liquid injection hole of the aluminum-shell battery when the battery is formed, the upper end part of the sucking disc is sleeved on the lower end part of the air pipe, the upper end part of the air pipe is connected with an integrally formed cavity for containing electrolyte, the upper end pipe orifice of the air pipe is higher than the connecting part of the air pipe I and the cavity, the lower end pipe orifice is lower than the pipe orifice of the bottom of the liquid guide pipe, the connecting part of the air pipe I and the cavity is higher than the lowest plane of the bottom of the cavity, the highest position of the upper end of the cavity is provided; the central shafts of the sucking disc, the first air pipe, the cavity and the second air pipe are positioned on the same straight line; electrolyte backflow is prevented from being drawn out, battery pollution is avoided, after formation is finished, residual electrolyte is simple to recover and operate, and workshop environment pollution caused by electrolyte volatilization can be avoided.

Description

Anti-backflow formation joint for aluminum-shell battery

Technical Field

The utility model belongs to the technical field of lithium ion battery makes, concretely relates to aluminium shell battery anti-reflux becomes to connect.

Background

In the existing manufacturing process of the aluminum-shell lithium ion battery, formation is carried out in a negative pressure mode, and electrolyte is possibly pumped out while air is pumped out. Generally, the electrolyte is pumped out to a rubber cup joint which is in direct contact with a liquid injection hole of the aluminum-shell battery, and after formation is finished, the electrolyte in the rubber cup joint reflows to the aluminum-shell battery when vacuum is broken. Because the work load of cleaning the rubber cup is large, time and labor are consumed, a plurality of battery manufacturers belong to regular cleaning or do not carry out cleaning, and the risk of polluting the battery exists in the electrolyte backflow when different electrolyte batteries are formed.

Disclosure of Invention

An object of the utility model is to overcome the above-mentioned not enough of prior art and provide an anti-return aluminium shell ization becomes equipment joint, can prevent to become in-process electrolyte backward flow to the battery, causes the pollution.

An anti-backflow formation joint for an aluminum-shell battery comprises a sucker, a first air pipe, a cavity and a second air pipe which are sequentially connected from bottom to top; the sucking disc is internally provided with a central through hole, the lower end part of the sucking disc is tightly adsorbed on the periphery of a liquid injection hole of the aluminum-shell battery when the battery is formed, the upper end part of the sucking disc is sleeved on the lower end part of the air pipe, the upper end part of the air pipe is connected with an integrally formed cavity for containing electrolyte, the upper end pipe orifice of the air pipe is higher than the connecting part of the air pipe I and the cavity, the lower end pipe orifice is lower than the pipe orifice of the bottom of the liquid guide pipe, the connecting part of the air pipe I and the cavity is higher than the lowest plane of the bottom of the cavity, the highest position of the upper end of the cavity is provided; the central shafts of the sucking disc, the first air pipe, the cavity and the second air pipe are positioned on the same straight line.

The sucker is of a cylindrical table structure, and the size of the lower bottom surface of the sucker is larger than that of the upper end surface of the sucker.

The aperture of the central through hole in the sucker is larger than the size of the liquid injection hole, smaller than the diameter of the air pipe by one diameter and smaller than the thickness of the aluminum shell battery.

The sucking disc adopts the electrolyte corrosion resistant rubber material.

The cavity is in an inverted heart-shaped structure.

The lower end pipe orifice of the first air pipe is 2-4 cm lower than the bottom pipe orifice of the liquid guide pipe, and the upper end pipe orifice is 1-2 cm higher than the connecting part of the first air pipe and the cavity.

The liquid guide pipe is 1.5-2 cm long.

The diameter of the second air pipe is consistent with that of the first air pipe.

The first air pipe, the cavity and the second air pipe are all made of polytetrafluoroethylene materials.

Compared with the prior joint, the utility model discloses anti-return aluminum shell ization becomes equipment joint and has the benefit lie in: 1. aiming at the aluminum shell lithium ion battery, the backflow of the extracted electrolyte can be prevented in the formation process, and the pollution is avoided. 2. The electrolyte is extracted in the formation process, the recovery operation is simple, and the workshop environment pollution caused by the volatilization of the electrolyte can be avoided.

Drawings

FIG. 1 is a joint diagram of the anti-backflow aluminum-shelled forming device of the present invention;

in the figure: 1-suction cup, 2-trachea I, 3-cavity, 4-catheter and 5-trachea II.

Detailed Description

In order to further the understanding and appreciation of the present invention, the present invention will be further explained in detail with reference to the following embodiments. It should be noted that the embodiment is only used for explaining the present invention, and does not constitute a limitation to the scope of the present invention.

As shown in figure 1, the utility model comprises a suction cup 1, a first air pipe 2, a cavity 3, a catheter 4 and a second air pipe 5. Wherein, sucking disc 1 is the cylinder platform structure, belongs to resistant electrolyte corrosion rubber material, and belongs to removable part. The inner part of the battery is provided with a central through hole, the diameter of the central through hole is consistent, the air pipe I2 can be sleeved with the small-size end face of the cylindrical table, the two end faces are flat and smooth, the large-size end face of the cylindrical table can be in close contact with the liquid injection hole face of the aluminum shell, the size of the through hole is larger than that of the liquid injection hole, the diameter of the through hole is slightly smaller than that of the air pipe I2, and. The end face of the sucking disc 1 contacting with the aluminum shell battery is smooth and flat, the battery rises to contact with the sucking disc in the formation process, the sucking disc is in a slight compression state, certain air tightness is achieved, the vacuum degree of the whole pipeline in the formation process can be guaranteed, and air leakage is avoided. The first air pipe 2 is made of polytetrafluoroethylene and has certain electrolyte corrosion resistance. The bottom pipe orifice of the first air pipe 2 is lower than the bottommost end of the liquid guide pipe 4 on the cavity 3 by 2-4 cm, and the upper pipe orifice is higher than the cavity joint by 1-2 cm. The cavity 3 is in the shape of an inverted heart, the material of the cavity belongs to polytetrafluoroethylene, the electrolyte corrosion resistance is certain, the inverted heart can contain more electrolyte, and the problem of overflow is not worried about and frequent cleaning is not needed. Is integrally formed with the first air pipe 2 and the second air pipe 5. The liquid guide pipe 4 is made of polytetrafluoroethylene, an opening is formed at the lowest position of the cavity, and the length of the liquid guide pipe is 1.5-2 cm. And the cavity and the cover are integrally formed. The liquid guide pipe can be connected with the rubber pipe, the rubber pipe is sealed by the water stop clamp during the formation period when the end of the rubber pipe is close to the liquid guide pipe 4, and the water stop clamp can be opened to recycle residual electrolyte in the cavity after the formation is finished.

The second air pipe 5 is made of polytetrafluoroethylene and has certain electrolyte corrosion resistance. The upper end of the second gas pipe 5 is communicated with a vacuumizing and nitrogen pipeline during formation, sealing is kept, and the pipe diameter is consistent with that of the first gas pipe.

The use process comprises the following steps:

the method comprises the following steps: connecting the liquid guide tube 4 with the rubber tube, and then clamping the rubber tube by using a water stop clamp, and ensuring stopping to prevent liquid leakage;

step two: the upper end of the second air pipe 5 is communicated with an air exhaust pipeline;

step three: the lower end of the sucking disc 1 is tightly adsorbed outside the liquid injection hole of the aluminum-shell battery, so that no air leakage is ensured;

step four: during the process of starting and forming, gas continuously generated by the battery is continuously extracted through the connector in the negative pressure process, and meanwhile, a part of electrolyte may be extracted. After the electrolyte is pumped out through the joint pipeline I, one part of the electrolyte and the gas are pumped out through a pipeline II 5, the electrolyte pumped out through the pipeline II 5 enters an electrolyte recycling bin, and the other part of the electrolyte is remained in the cavity 3; the electrolyte remained in the cavity 3 has enough lower space due to the inverted heart-shaped design of the cavity, and the pipe orifice at the upper end of the air pipe is higher than the joint of the cavity 3 enough, so that the extracted electrolyte can be effectively prevented from flowing back to the battery to cause pollution;

step five: after the formation is finished, the broken vacuum is filled with nitrogen, and the electrolyte is not brought back to the inside of the battery when the broken vacuum is generated because the opening of the first air pipe 2 is higher than the bottom of the cavity 3;

step six: after formation is completed, the water stop clamp can be opened, and residual electrolyte in the cavity is recycled (the step can be adjusted according to specific conditions, and if the electrolyte in the cavity is less in residue, the next formation is not influenced, and the step can be omitted).

To sum up, adopt the utility model discloses anti-return aluminum shell ization becomes equipment joint has following advantage: 1. aiming at the aluminum shell lithium ion battery, the backflow of the extracted electrolyte can be prevented in the formation process, and the pollution is avoided. 2. The electrolyte is extracted in the formation process, the recovery operation is simple, and the workshop environment pollution caused by the volatilization of the electrolyte can be avoided.

It should be noted that the above-mentioned examples are only for facilitating the understanding of the preferred embodiments provided by the person skilled in the art, and are not intended to be limiting, and that the present invention is not limited to the above-mentioned embodiments, and that some modifications and changes of the present invention are also intended to fall within the scope of the claims of the present invention, i.e. equivalent changes made in the claims of the present invention are still within the scope of the present invention.

Claims

1. The utility model provides an aluminium shell battery anti-reflux becomes to connect which characterized in that: comprises a sucker (1), a first air pipe (2), a cavity (3) and a second air pipe (5) which are connected in sequence from bottom to top; a central through hole is formed in the sucker (1), the lower end of the sucker (1) is tightly adsorbed to the periphery of a liquid injection hole of an aluminum-shell battery when the battery is formed, the upper end of the sucker is sleeved at the lower end of the air pipe I (2), the upper end of the air pipe I (2) is connected with an integrally formed cavity (3) for containing electrolyte, an upper end pipe orifice of the air pipe I (2) is higher than a connecting part of the air pipe I (2) and the cavity (3), a lower end pipe orifice is lower than a bottom pipe orifice of the liquid guide pipe (4), a connecting part of the air pipe I (2) and the cavity (3) is higher than the lowest plane of the bottom of the cavity (3), an upper opening is formed at the highest position of the upper end of the cavity (3), a lower opening is formed at the lowest position of; the central shafts of the sucker (1), the air pipe I (2), the cavity (3) and the air pipe II (5) are positioned on the same straight line.

2. The anti-backflow formation joint for the aluminum-shell battery as claimed in claim 1, wherein: the sucker (1) is of a cylindrical table structure, and the size of the lower bottom surface of the sucker (1) is larger than that of the upper end surface of the sucker.

3. The anti-backflow formation joint for the aluminum-shell battery as claimed in claim 2, wherein: the aperture of the central through hole in the sucker (1) is larger than the size of the liquid injection hole, smaller than the pipe diameter of the first air pipe (2), and smaller than the thickness of the aluminum shell battery.

4. The anti-backflow formation joint for the aluminum-shell battery as claimed in claim 3, wherein: the sucking disc (1) is made of electrolyte corrosion resistant rubber.

5. The anti-backflow formation joint for the aluminum-shell battery as claimed in claim 1, wherein: the cavity (3) is in an inverted heart-shaped structure.

6. The anti-backflow formation joint for the aluminum-shell battery as claimed in claim 5, wherein: the lower end pipe orifice of the first air pipe (2) is 2-4 cm lower than the bottom pipe orifice of the liquid guide pipe (4), and the upper end pipe orifice is 1-2 cm higher than the connecting part of the first air pipe (2) and the cavity (3).

7. The anti-backflow formation joint for the aluminum-shell battery as claimed in claim 1, wherein: the catheter (4) is 1.5-2 cm long.

8. The anti-backflow formation joint for the aluminum-shell battery as claimed in claim 1, wherein: the pipe diameter of the second air pipe (5) is consistent with that of the first air pipe (2).

9. The anti-backflow formation joint for the aluminum-shell battery as claimed in claim 1, wherein: the first air pipe (2), the cavity (3) and the second air pipe (5) are all made of polytetrafluoroethylene materials.