CN212934814U

CN212934814U - Electrolyte filling device under vacuum environment

Info

Publication number: CN212934814U
Application number: CN202022198178.5U
Authority: CN
Inventors: 孟宪刚
Original assignee: Shanghai Tuohui Mechanical Equipment Co ltd
Current assignee: Shanghai Tuohui Mechanical Equipment Co ltd
Priority date: 2020-09-29
Filing date: 2020-09-29
Publication date: 2021-04-09
Anticipated expiration: 2030-09-29

Abstract

The utility model relates to the technical field of lithium battery electrolyte filling devices, and discloses an electrolyte filling device in a vacuum environment, which comprises a valve body; the valve body having an inlet and an outlet; an elastic valve core which is pressurized and filled with electrolyte to overcome elastic force and open the outlet is arranged in the valve body, and the elastic valve core is in sealing fit with the outlet. This electrolyte priming device under vacuum environment is a mechanical type normally closed valve, relies on the pressure that adds the pressure and lets in electrolyte to open to close by self elastic force, self-closing when annotating liquid pipeline internal pressure and being less than the elastic force ensures to annotate and keeps the malleation in the liquid pipeline, can not produce the negative pressure. The liquid injection structure has the advantages of higher liquid injection precision, no liquid dropping and no battery pollution. This kind of annotate liquid structure, its advantage can protect to annotate the liquid pipeline not influenced by the vacuum all the time, avoids whole annotating liquid pipeline and exposes and lead to annotating the risk that liquid was vaporized in the liquid pipeline under the vacuum when this vacuum environment under electrolyte priming device's export was opened.

Description

Electrolyte filling device under vacuum environment

Technical Field

The utility model relates to a lithium battery electrolyte filling technical field especially relates to a priming device of lithium battery electrolyte under vacuum environment.

Background

The vacuum liquid injection applied to the lithium ion soft package power battery at present has two modes:

1. transition cup filling

A diaphragm valve and a transition cup are added on the conical nozzle, electrolyte is firstly injected into the transition cup, the diaphragm valve is opened after the battery is vacuumized, and the electrolyte flows into the battery to finish liquid injection. The structure has the defects that the electrolyte in the transition cup can not be completely discharged, so that the electrolyte injected into the battery is unstable and can be ignored, and the battery is polluted due to the conditions of liquid dropping and the like.

2. Cylinder type needle valve injection liquid

The cylinder needle testing valve can solve the problem of liquid dropping in a vacuum environment, but because the valve is in an open state in the electrolyte injection process, the whole pipeline can be exposed to vacuum under the condition of high vacuum degree, so that liquid in the pipeline is vaporized.

Further analysis, transition cup-shaped annotates liquid because the volume ratio of cup is great, accomplishes at every turn and annotates liquid and can't guarantee that remaining electrolyte all is identical in the cup, consequently can appear annotating the undulant great condition of liquid volume, in addition just the liquid in the liquid injection pipeline between the outer diaphragm valve of cup to the battery is difficult all emptions, has the dropping liquid condition to produce, causes the fluctuation of annotating the liquid volume and the pollution to the battery.

The problem of dropping liquid under the vacuum environment can be solved to cylinder examination needle valve, but because cylinder examination needle valve is the open mode at the in-process valve that electrolyte was poured into, consequently whole pipeline all can expose under the vacuum under the condition of high vacuum degree, makes the liquid vaporization in the pipeline, causes the pipeline to produce the bubble and annotates the undulant great drawback of liquid volume.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an electrolyte priming device under vacuum environment to solve among the prior art above-mentioned technical problem that the liquid precision is low is annotated in the vacuum, can protect the priming pump and annotate the liquid pipeline under the condition of high vacuum degree, ensure to annotate the interior liquid of liquid pipeline and not vaporized by the vacuum, and then ensured the precision of liquid is annotated in the vacuum, the problem of dropping liquid pollution battery can not appear.

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

an electrolyte injection device in a vacuum environment comprises a valve body; the valve body having an inlet and an outlet; an elastic valve core which is pressurized and filled with electrolyte to overcome elastic force and open an outlet to inject liquid is arranged in the valve body, and the elastic valve core is in sealing fit with the outlet.

According to the utility model discloses an electrolyte priming device under vacuum environment, the valve body is the sleeve pipe, and sets up to the entry for sheathed tube first end, and the second end is established to the export.

According to the utility model discloses an electrolyte priming device under vacuum environment, the sleeve pipe cooperation export is formed with the awl mouth, and the tip of awl mouth is the free end.

According to the utility model discloses an electrolyte priming device under vacuum environment, the inner wall of export takes shape to the taper hole, and the tip setting of the main aspects cooperation awl mouth of taper hole.

According to the electrolyte injection device in the vacuum environment of the utility model, the valve core comprises a valve rod which is arranged in the sleeve in a penetrating way; the first end of the valve rod is connected with the valve plug, the second end of the valve rod is connected with the limiting block, and a spring sleeved outside the valve rod is arranged between the valve plug and the limiting block; a connecting step is formed at the first end of the sleeve corresponding to the spring, and the connecting step is arranged close to the outlet; and a limiting step is formed in the sleeve corresponding to the limiting block.

According to the utility model discloses an electrolyte priming device under vacuum environment, the valve plug is the toper cock body of cooperation taper hole, and the inner wall of cooperation taper hole is provided with the sealing washer on the conical surface of toper cock body.

According to the utility model discloses an electrolyte priming device under vacuum environment, the sealing washer is o type circle.

According to the utility model discloses an electrolyte priming device under vacuum environment, the entry linkage has the filling pump.

The utility model has the advantages that:

the electrolyte injection device under the vacuum environment is a mechanical normally-closed valve, does not need external power, does not need an air source and a power supply, is opened by the pressure of pressurizing and introducing the electrolyte, is closed by the elastic force (an elastic valve core) of the electrolyte, and is automatically closed when the pressure in the electrolyte injection pipeline is smaller than the elastic force, so that the positive pressure is kept in the electrolyte injection pipeline, and the negative pressure cannot be generated. Compared with transition cup type liquid injection, the liquid injection structure has the advantages of higher liquid injection precision, no liquid dropping and no battery pollution. This kind of annotate liquid structure and cylinder type needle valve and annotate liquid and compare, its advantage does not need additionally to set up the air supply, can protect annotating the liquid pipeline and not receive vacuum influence all the time, avoids whole annotating the liquid pipeline and expose and lead to annotating the risk that liquid was vaporized in the liquid pipeline under the vacuum when this vacuum environment electrolyte priming device's export is opened.

Drawings

Fig. 1 is a schematic structural view (half section) of a preferred embodiment of the present invention;

FIG. 2 is a side view (inlet end view) of FIG. 1;

FIG. 3 is a side view (outlet end view) of FIG. 1;

reference numerals:

the plug comprises a conical plug body 1, an o-shaped ring 2, a conical nozzle 3, a valve rod 4, a spring 5, a limiting block 6, an elastic valve core 7, a sleeve 8, a connecting step 9 and a limiting step 10.

Detailed Description

The following description is provided for illustrative purposes, and other advantages and features of the present invention will become apparent to those skilled in the art from the following detailed description.

Please refer to the attached drawings. It should be understood that the structure, ratio, size and the like shown in the drawings attached to the present specification are only used for matching with the content disclosed in the specification, so as to be known and read by those skilled in the art, and are not used for limiting the limit conditions that the present invention can be implemented, so that the present invention has no technical essential meaning, and any structure modification, ratio relationship change or size adjustment should still fall within the scope that the technical content disclosed in the present invention can cover without affecting the function that the present invention can produce and the purpose that the present invention can achieve. Meanwhile, the terms such as "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for convenience of description, and are not intended to limit the scope of the present invention, and changes or adjustments of the relative relationship thereof may be made without substantial technical changes, and the present invention is also regarded as the scope of the present invention.

Examples

Referring to fig. 1-3, the present invention provides an electrolyte filling device under vacuum environment, which includes a valve body; the valve body having an inlet and an outlet; an elastic valve core 7 which is pressurized and filled with electrolyte to overcome elastic force and open an outlet for injecting liquid outwards is arranged in the valve body, and the elastic valve core 7 is in sealing fit with the outlet.

The valve body is a sleeve 8, and the first end of the sleeve 8 is set as an inlet, and the second end is set as an outlet.

The sleeve 8 is matched with the outlet to form a cone nozzle 3, and the small end of the cone nozzle 3 is a free end.

The inner wall of the outlet is formed into a taper hole, and the large end of the taper hole is matched with the small end of the taper nozzle 3.

Wherein the sleeve 8 may be made of stainless steel tubing.

The valve core comprises a valve rod 4 which is arranged in the sleeve 8 in a penetrating way; the first end of the valve rod 4 is connected with the valve plug, the second end of the valve rod is connected with the limiting block 6, and a spring 5 sleeved outside the valve rod 4 is arranged between the valve plug and the limiting block 6; a connecting step 9 is formed in the sleeve 8 corresponding to the first end of the spring 5, and the connecting step 9 is arranged close to the outlet; the corresponding limiting block 6 in the sleeve 8 is formed with a limiting step 10.

The limiting block 6 is matched with the limiting step 10 and is resisted and limited by the limiting step 10. In addition, the restriction block 6 may be provided in plurality.

The valve plug is the toper cock body 1 of cooperation taper hole, and the inner wall that cooperates the taper hole on the conical surface of toper cock body 1 is provided with the sealing washer.

The sealing ring is an o-shaped ring 2. The conical plug body 1 is plugged in the sealing conical hole by the o-shaped ring 2 under the elastic force action of the spring 5.

The inlet is connected with a liquid injection pump.

In the above technical solution, the sleeve 8 is a carrier and is also a main body of the electrolyte injection device in the vacuum environment; the spring 5 plays a role in closing the device and is mainly realized by the o-shaped ring 2 with a sealing function, and meanwhile, the spring 5 can overcome the suction force of vacuum; the elastic valve core 7 is used for starting or closing the liquid injection pipeline.

The priming pump provides the cracking pressure of 1 ~ 3kpa for sleeve pipe 8's entrance, and electrolyte priming device opens under this vacuum environment, and liquid flows through sleeve pipe 8 and outwards annotates liquid. After the liquid injection pump is stopped, the inlet pressure is reduced, the device is automatically closed by the elastic force of the spring 5, the vacuum degree of-95 kpa is blocked, and the liquid in the liquid injection pipeline is ensured not to be vaporized by vacuum.

The above embodiments are merely illustrative of the principles and effects of the present invention, and are not to be construed as limiting the invention. Modifications and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which may be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.

Claims

1. An electrolyte injection device in a vacuum environment is characterized by comprising a valve body; the valve body having an inlet and an outlet; an elastic valve core which is pressurized and filled with electrolyte to overcome elastic force and open an outlet to inject liquid is arranged in the valve body, and the elastic valve core is in sealing fit with the outlet.

2. The electrolyte injection apparatus under vacuum environment as recited in claim 1, wherein the valve body is a sleeve, and a first end of the sleeve is provided as an inlet and a second end of the sleeve is provided as an outlet.

3. The electrolyte injection device under the vacuum environment of claim 2, wherein the sleeve is provided with a cone nozzle matched with the outlet, and the small end of the cone nozzle is a free end.

4. The electrolyte injection device under the vacuum environment of claim 3, wherein the inner wall of the outlet is shaped as a taper hole, and the large end of the taper hole is matched with the small end of the taper nozzle.

5. The electrolyte injection device under the vacuum environment according to claim 4, wherein the valve core comprises a valve rod arranged in the sleeve in a penetrating way; the first end of the valve rod is connected with the valve plug, the second end of the valve rod is connected with the limiting block, and a spring sleeved outside the valve rod is arranged between the valve plug and the limiting block; a connecting step is formed at the first end of the sleeve corresponding to the spring, and the connecting step is arranged close to the outlet; and a limiting step is formed in the sleeve corresponding to the limiting block.

6. The electrolyte injection device under the vacuum environment of claim 5, wherein the valve plug is a conical plug body matched with the conical hole, and a sealing ring is arranged on the conical surface of the conical plug body and matched with the inner wall of the conical hole.

7. The electrolyte injection device under vacuum environment of claim 6, wherein the sealing ring is an o-ring.

8. The electrolyte injection device under vacuum environment of claim 1, wherein the inlet is connected with an injection pump.