CN217009514U

CN217009514U - Suck-back type annotates liquid and uses air extraction needle

Info

Publication number: CN217009514U
Application number: CN202122443265.7U
Authority: CN
Inventors: 马延会; 邱平; 徐艳燕; 李宝文; 吴琼
Original assignee: Gansu Jingpu Testing Technology Co ltd; Jinchuan Group Co Ltd
Current assignee: Gansu Jingpu Testing Technology Co ltd; Jinchuan Group Co Ltd
Priority date: 2021-10-11
Filing date: 2021-10-11
Publication date: 2022-07-19
Anticipated expiration: 2031-10-11

Abstract

An air extraction needle for inverted liquid injection comprises a needle head, a needle stem, a needle seat and a needle seat inner sealing ring, wherein the needle head is positioned on the needle stem, the needle seat is arranged on a needle seat bottom plate, the needle stem is connected with the needle seat through the needle seat inner sealing ring, and the bottom of the needle stem is communicated with a vacuum cavity. The utility model has simple structure, easy manufacture and simple and convenient operation; the device is used for injecting liquid, a vacuum chamber is not needed for standing after the liquid is injected, the higher the vacuum degree of a vacuum source is, the faster the liquid injection time is, and the liquid injection infiltration of the electrolyte is completed within 5 minutes and then transferred to the subsequent sealing process; after the filtering treatment of the filter screen, the electrolyte is recycled, and the electrolyte can be recycled.

Description

Suck-back type annotates liquid and uses air extraction needle

Technical Field

The utility model belongs to the technical field of batteries, and particularly relates to an air extraction needle for inverted liquid injection.

Background

At present, advocate that the high efficiency is accomplished and is annotated a lot of adoption of enterprise of liquid is that negative pressure inverted suction type annotates liquid machine, lets the inside negative pressure of inhaling of battery case earlier, is connected battery case and electrolyte with the pipeline, makes and forms pressure differential between the inside and electrolyte place space of battery case, utilizes this pressure differential to make inside electrolyte automatic suction battery case, the completion is automatic annotates liquid. The ordinary liquid cup of annotating that battery notes liquid generally adopted is an both ends opening, and the outer edge takes the cylinder type cup of sealing washer, embolias electric core upper end, and the ordinary pressure is annotated the liquid back, and the mode of stewing many times in the vacuum storehouse is accomplished the battery and is annotated the infiltration after the liquid, and the problem that this kind of liquid mode exists is annotated: the liquid injection time is long, and the liquid injection efficiency is low; in the process of vacuum standing, when the vacuumizing speed is not controlled properly, the electrolyte is easy to splash, and the electrolyte injection amount is insufficient due to the loss of the electrolyte; after the battery is injected with liquid, the battery is kept stand for a long time in vacuum, the electrolyte is easy to volatilize, and the battery is kept stand; the liquid injection port of the battery is not completely sealed, and the electrolyte in the battery risks being polluted.

SUMMERY OF THE UTILITY MODEL

The utility model provides an air extraction needle for inverted liquid injection, which comprises a needle head, a needle stem, a needle seat and a needle seat inner sealing ring, wherein the needle head is positioned on the needle stem; the length of the needle stalk is greater than the height of the battery; the outer diameter of the needle head is smaller than the hole diameter of the inner hole of the battery cell; the inclination angle of the needle base bottom plate is 30-50 degrees; the number of the needle seats arranged on the needle seat bottom plate is 300 and 500; the outer diameter of the needle stalk is 1-2mm, the length is 72-120mm, and the center hole pitch is 15-25 mm.

Compared with the prior art, the utility model has the following advantages: the structure is simple, the manufacture is easy, and the operation is simple and convenient; the device is used for injecting liquid, a vacuum chamber is not needed to be kept stand after the liquid is injected, the higher the vacuum degree of a vacuum source is, the faster the liquid injection time is, and the liquid injection infiltration of the electrolyte is completed within 5 minutes and then the subsequent sealing process is carried out; after the filtering treatment of the filter screen, the electrolyte is recycled, and the electrolyte can be recycled.

Drawings

The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.

FIG. 1 is a cross-sectional view of the present invention;

FIG. 2 is an enlarged partial cross-sectional view of the present invention;

FIG. 3 is a top view of the present invention;

fig. 4 is a schematic view of injection according to the present invention.

In the figure: 1-liquid injection groove 11-electrolyte groove 12-vacuum cavity 13-vacuum source interface 14-vacuum breaking valve 15-electrolyte return valve 16-filter screen 17-electrolyte return groove 18-needle base bottom plate 19-positioning pin 2-needle stem 21-needle 22-needle base 23-needle base inner sealing ring 31-liquid suction hole 32-battery positioning hole 33-sealing ring 34-positioning hole 4-battery 41-battery shell 42-battery cell 43-battery cell inner hole.

Detailed Description

The suction needle for inverted liquid injection as shown in fig. 1, fig. 2 and fig. 3 comprises a needle 21, a needle stem 2, a needle seat 22 and a needle seat inner sealing ring 23, wherein the needle 21 is positioned on the needle stem 2, the needle seat 22 is arranged on a needle seat bottom plate 18, the needle stem 2 is connected with the needle seat 22 through the needle seat inner sealing ring 23, and the bottom of the needle stem 2 is communicated with a vacuum cavity 12; the length of the needle stalk 2 is larger than the height of the battery; the outer diameter of the needle head 21 is smaller than the hole diameter of a cell inner hole 43 of the cell 42; the inclination angle of the needle base bottom plate 18 is 30-50 degrees; the number of the needle seats 22 arranged on the needle seat bottom plate 18 is 300 and 500; the outer diameter of the needle stalk 2 is 1-2mm, the length is 72-120mm, and the center hole distance is 15-25 mm.

When the device is used as shown in fig. 4, a proper amount of electrolyte is injected into the electrolyte tank 11, the liquid level is not higher than the needle stem 2, the sealing cover plate is placed into the battery electrolyte tank 11 and fixed with the positioning pin 19 through the positioning hole 34, the needle heads 21 are respectively inserted into the cell inner holes 43 of the corresponding batteries 4, and the ports of the batteries 4 are sealed by the electrolyte. And opening the vacuum source interface 13, pumping out air in the battery cell 42 along the needle stem 2, forming negative pressure in the battery, and sucking the electrolyte into the battery cell 42 from the liquid suction hole 31 under the action of the negative pressure to finish liquid injection. After the liquid injection is completed, dust and the like falling into the liquid injection groove 1 flow to the electrolyte return groove 17 along the needle seat bottom plate 18 of the liquid injection groove, are subjected to filtering treatment by the filter screen 16 and are recycled by the electrolyte return valve 15, and the electrolyte recycling can be realized.

Since the present invention is not limited to the above embodiments, those skilled in the art can make modifications and variations to the above embodiments without departing from the scope of the present invention.

Claims

1. The utility model provides a suck-back formula is annotated and is used air extraction needle which characterized in that: it includes syringe needle (21), needle stalk (2), needle file (22) and needle file inner seal circle (23), syringe needle (21) are located on needle stalk (2), needle file (22) are arranged in on needle file bottom plate (18), needle stalk (2) are connected with needle file (22) through needle file inner seal circle (23), needle stalk (2) bottom and vacuum cavity (12) intercommunication.

2. The suction needle for inverted liquid injection according to claim 1, characterized in that: the length of the needle stalk (2) is larger than the height of the battery.

3. The suction needle for inverted liquid injection according to claim 1, characterized in that: the outer diameter of the needle head (21) is smaller than the hole diameter of a battery cell inner hole (43) of the battery cell (42).

4. The suction needle for inverted liquid injection according to claim 1, characterized in that: the inclination angle of the needle seat bottom plate (18) is 30-50 degrees.

5. The suction needle for inverted liquid injection according to claim 1, characterized in that: the number of the needle seats (22) arranged on the needle seat bottom plate (18) is 300 and 500.

6. The aspiration type suction needle for liquid injection according to any one of claims 2 and 3, wherein: the outer diameter of the needle stalk (2) is 1-2mm, the length is 72-120mm, and the center hole distance is 15-25 mm.