CN216251038U

CN216251038U - Lithium battery electrolyte injection device

Info

Publication number: CN216251038U
Application number: CN202122650529.6U
Authority: CN
Inventors: 常翠荣; 王双双; 刘慧慧; 顾润
Original assignee: Hefei Guoxuan High Tech Power Energy Co Ltd
Current assignee: Hefei Gotion High Tech Power Energy Co Ltd
Priority date: 2021-10-29
Filing date: 2021-10-29
Publication date: 2022-04-08
Anticipated expiration: 2031-10-29

Abstract

The utility model discloses a lithium battery electrolyte injection device which comprises a liquid storage tank, a left cavity, a right cavity, a suction piston, a pressure release valve and a vacuumizing connector, wherein the liquid storage tank is a transparent tank body, volume scale marks are marked on the side wall of the transparent tank body, a needle head communicated with the interior of the liquid storage tank is arranged at the bottom end of the liquid storage tank, the bottom ends of the left cavity and the right cavity are connected to the top end of the liquid storage tank and are respectively communicated with the interior of the liquid storage tank, the pressure release valve and the vacuumizing connector are arranged on the left cavity, and the bottom end of the suction piston is embedded into the right cavity. The utility model enables the electrolyte to flow into the lithium battery quickly, accurately controls the injection amount and avoids the waste caused by the overflow of the electrolyte.

Description

Lithium battery electrolyte injection device

Technical Field

The utility model relates to the technical field of lithium battery electrolyte injection, in particular to a lithium battery electrolyte injection device.

Background

The lithium ion battery mainly comprises four main materials, including a positive plate, a negative plate, a diaphragm for isolating the positive plate and the negative plate, and electrolyte, wherein the electrolyte is used as a transmission medium of lithium ions, so that the lithium ions shuttle back and forth between the positive plate and the negative plate to complete the charging and discharging process of the battery. However, the injection of the electrolyte is a cumbersome process.

The filling device that adopts at present is very slow when pouring into electrolyte into, will pour into some electrolyte into earlier, waits that electrolyte soaks to stew and continues to annotate the liquid after a period of time again, and the more of the electrolyte that contains in the battery, follow-up injection electrolyte just is difficult more, and at the in-process of annotating electrolyte, also can not accurately grasp the injection volume, because inside and outside pressure is inconsistent, annotate the liquid too fast or pour into too much and all can lead to electrolyte to spill over, cause the waste of electrolyte.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a lithium battery electrolyte injection device, so that electrolyte can rapidly flow into a lithium battery, the injection amount can be accurately controlled, and waste caused by overflow of the electrolyte is avoided.

The technical scheme of the utility model is as follows:

the utility model provides a lithium cell electrolyte priming device, including the liquid storage pot, left cavity, right cavity, the suction piston, relief valve and evacuation connect, the liquid storage pot is the transparent jar of body, mark the volume scale mark on the lateral wall of the transparent jar of body, the bottom of liquid storage pot be provided with the syringe needle of the inside intercommunication of liquid storage pot, the bottom of left cavity and right cavity all connect in the top of liquid storage pot and respectively with the inside intercommunication of liquid storage pot, relief valve and evacuation connect all set up on left cavity, the bottom of suction piston is embedded into right cavity indoor.

The suction piston comprises a piston body, a guide shaft with the bottom end connected to the piston body and a handle connected to the top end of the guide shaft, wherein the piston body is embedded into the right cavity, and the handle is always positioned above the right cavity.

The top of right cavity be fixed with direction limiting sleeve pipe, direction limiting sleeve pipe's bottom and right cavity intercommunication, the bottom of guide shaft passes direction limiting sleeve pipe and stretches into in the right cavity, the handle is located the top on direction limiting sleeve pipe top all the time.

The needle head is sleeved with a sealing ring.

The utility model has the advantages that:

(1) the vacuum pumping joint is connected with the vacuum pump, so that negative pressure is generated in the liquid storage tank, the pumping piston is conveniently controlled to move upwards to pump electrolyte into the liquid storage tank, then the pressure relief valve relieves pressure, so that the interior of the liquid storage tank recovers normal pressure and is communicated with a battery with internal negative pressure, and the electrolyte in the liquid storage tank automatically flows into the battery with negative pressure, so that the aim of quick liquid injection is fulfilled;

(2) the volume scale marks are arranged on the liquid storage tank, so that the change of the capacity of the electrolyte in the liquid storage tank can be accurately mastered, the injection amount of the electrolyte can be accurately mastered, and the electrolyte is prevented from overflowing and being wasted;

(3) in order to improve the liquid injection speed, the pressure release valve can be closed after the liquid is injected for a period of time, and the suction piston moves downwards to press out the electrolyte in the liquid storage tank, so that the liquid injection speed is increased.

(4) The guide limiting sleeve guides the suction piston on one hand, and conveniently limits the lowest position of the suction piston to move downwards on the other hand, so that the suction piston is prevented from moving out of the right chamber.

Drawings

Fig. 1 is a perspective view of the present invention.

Fig. 2 is a cross-sectional view of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1 and 2, a lithium battery electrolyte injection device comprises a liquid storage tank 1, a left chamber 2, a right chamber 3, a suction piston 4, a pressure release valve 5 and a vacuumizing connector 6, wherein the liquid storage tank 1 is a transparent tank body, the side wall of the transparent tank body is marked with volume scale marks, the bottom end of the liquid storage tank 1 is provided with a needle 7 communicated with the inside of the liquid storage tank 1, the needle 7 is sleeved with a sealing ring, the bottom ends of the left chamber 2 and the right chamber 3 are both connected to the top end of the liquid storage tank 1 and respectively communicated with the inside of the liquid storage tank 1, the pressure release valve 5 and the vacuumizing connector 6 are both arranged on the left chamber 2, the top end of the right chamber 3 is fixed with a guide limit sleeve 8, the bottom end of the guide limit sleeve 8 is communicated with the right chamber 3, the suction piston 4 comprises a piston body 41, the bottom end is connected to a guide shaft 42 on the piston body 41 and a handle 43 connected to the top end of the guide shaft 42, the piston body 41 is embedded into the right chamber 3, the bottom end of the guide shaft 42 passes through the guide limit sleeve 8 and extends into the right chamber 3, and the handle 43 is always positioned above the top end of the guide limit sleeve 8.

The working principle of the utility model is as follows:

(1) firstly, connecting a needle 7 with an electrolyte storage tank, connecting a vacuumizing joint 6 with a vacuum pump, closing a pressure release valve 5, vacuumizing by the vacuum pump to enable negative pressure to be formed inside the liquid storage tank 1, and then moving a sucking piston 4 upwards to enable electrolyte in the electrolyte storage tank to be sucked into the liquid storage tank 1;

(2) when electrolyte in the liquid storage tank 1 needs to be injected into the battery core, the interior of the battery core of the lithium battery is vacuumized, negative pressure is formed inside the battery core, the needle head 7 is connected with a liquid injection hole of the battery core, the sealing ring on the needle head 7 ensures the connection tightness, then the pressure relief valve 5 is opened to relieve the pressure, so that the interior of the liquid storage tank 1 is restored to a normal pressure state, the electrolyte in the liquid storage tank 1 can be quickly injected into the negative pressure battery core under the action of air pressure, and the change of the volume of the electrolyte in the liquid storage tank 1 can be observed through volume scale lines to judge the injection amount in the battery core;

(3) when the electrolyte in the electric core reaches a certain amount, the injection of the electrolyte can be slowed down, at the moment, the pressure release valve 5 is closed, the suction piston 4 moves downwards to press out the electrolyte in the liquid storage tank 1, the liquid injection speed is accelerated, and the injection efficiency of the electrolyte is improved.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a lithium cell electrolyte priming device which characterized in that: including the liquid storage pot, left cavity, right cavity, suction piston, relief valve and evacuation joint, the liquid storage pot is the transparent jar of body, marks volume scale mark on the lateral wall of the transparent jar of body, the bottom of liquid storage pot be provided with the syringe needle of the inside intercommunication of liquid storage pot, the bottom of left cavity and right cavity all connect in the top of liquid storage pot and respectively with the inside intercommunication of liquid storage pot, relief valve and evacuation joint all set up on left cavity, the bottom of suction piston is embedded into in the right cavity.

2. The electrolyte filling device for lithium batteries according to claim 1, wherein: the suction piston comprises a piston body, a guide shaft with the bottom end connected to the piston body and a handle connected to the top end of the guide shaft, wherein the piston body is embedded into the right cavity, and the handle is always positioned above the right cavity.

3. The electrolyte filling device for lithium batteries according to claim 2, wherein: the top of right cavity be fixed with direction limiting sleeve pipe, direction limiting sleeve pipe's bottom and right cavity intercommunication, the bottom of guide shaft passes direction limiting sleeve pipe and stretches into in the right cavity, the handle is located the top on direction limiting sleeve pipe top all the time.

4. The electrolyte filling device for lithium batteries according to claim 1, wherein: the needle head is sleeved with a sealing ring.