CN211789262U

CN211789262U - Novel liquid injection structure

Info

Publication number: CN211789262U
Application number: CN201922163640.5U
Authority: CN
Inventors: 巩毅涛; 朱金鹏
Original assignee: Jiangsu Zhongguancun Jiatuo New Energy Equipment Co Ltd
Current assignee: Jiangsu Jiatuo New Energy Intelligent Equipment Co ltd
Priority date: 2019-12-05
Filing date: 2019-12-05
Publication date: 2020-10-27
Anticipated expiration: 2029-12-05

Abstract

The utility model relates to a novel annotate liquid structure, including annotating liquid cup subassembly, annotate the liquid pipe end of annotating liquid cup subassembly and be equipped with notes liquid mouth, annotate fixedly connected with seal structure subassembly on the liquid mouth, seal structure subassembly has the structure that seals and exert positive pressure to electric core explosion-proof valve from the outside. The utility model discloses a seal structure assembly compresses tightly around the explosion-proof valve and seals to apply the malleation to the electric core upper surface of explosion-proof valve outer lane, then by annotating the liquid mouth through annotating the inside pressure of applying of liquid mouth to electric core, make the electric core all receive certain pressure inside and outside, as long as guarantee that inside and outside differential pressure is less than 0.3Mpa and can satisfy the explosion-proof valve in the operating pressure within range, consequently can suitably improve the restriction that annotates liquid pressure and make it be greater than 0.3Mpa, thereby improve notes liquid efficiency greatly.

Description

Novel liquid injection structure

Technical Field

The utility model belongs to the technical field of lithium cell filling liquid frock technique and specifically relates to a novel annotate liquid structure.

Background

The existing lithium battery core injection device mainly adopts differential pressure type injection, namely, the inside of a battery core box is pumped into vacuum negative pressure, and then electrolyte is injected into the inside of the battery core box by using high positive pressure. However, due to safety considerations, when the positive pressure applied to the battery cell box from the liquid injection nozzle exceeds 0.3MPa, the explosion-proof valve on the top cover of the battery cell box body can burst, and the battery cell is scrapped. This limitation can affect cell injection efficiency.

SUMMERY OF THE UTILITY MODEL

The applicant aims at the defects in the prior art, and provides a structure which is reasonable, the limit is solved by the structure, the upper limit of positive pressure during liquid injection is improved, and the liquid injection efficiency is improved.

The utility model discloses the technical scheme who adopts as follows:

the utility model provides a novel annotate liquid structure, includes annotates liquid cup subassembly, annotates the liquid pipe end of annotating liquid cup subassembly and is equipped with notes liquid mouth, annotates fixedly connected with seal structure subassembly on the liquid mouth, seal structure subassembly has the structure that seals and exert normal pressure to the explosion-proof valve of electricity core from the outside.

As a further improvement of the above technical solution:

annotate the lower extreme of liquid cup subassembly and be equipped with the fixed plate that supplies to annotate the liquid mouth and pass, seal structure subassembly seals electric core explosion-proof valve and exerts the structure of positive pressure from the outside and does: including the sealed piece of fixed mounting at the fixed plate lower surface, sealed piece lower surface is equipped with the recess, the grooved underside is equipped with the through-hole, installs sealed air cock in the through-hole, and the marginal round of recess is equipped with the draw-in groove of installation sealing washer.

The lower surface of the fixing plate positioned on one side of the sealing block is provided with a fixing block for fixing the liquid injection nozzle, and the liquid injection nozzle extends out of the lower surface of the fixing block.

The air inlet end of the sealing air nozzle extends out of the upper surface of the fixing plate.

And air cylinder assemblies are respectively arranged on two sides of the fixed plate.

The battery cell is fixed by a positioning fixture, and a flange matched with the execution end of the air cylinder assembly is arranged on the positioning fixture.

The liquid injection cup assemblies are at least two, and at least two battery cell fixing positions corresponding to the liquid injection cup assemblies are arranged in the positioning fixture.

The utility model has the advantages as follows:

the utility model has the advantages of being compact and reasonable in structure, convenient operation, through seal structure assembly, compress tightly around the explosion-proof valve sealed, and apply the malleation to the electric core upper surface of explosion-proof valve outer lane, then by annotating the liquid mouth through annotating liquid mouth to the inside pressure of applying of electric core, make the electric core inside and outside all receive certain pressure, as long as guarantee inside and outside differential pressure be less than 0.3Mpa and can satisfy the explosion-proof valve in the operating pressure within range, consequently can suitably improve the restriction that liquid pressure makes it be greater than 0.3Mpa, thereby improve notes liquid efficiency greatly.

Drawings

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

Fig. 2 is a schematic structural view of the liquid injection assembly of the present invention.

Fig. 3 is an exploded view of the sealing structure assembly of the present invention.

Fig. 4 is a top view of the fixing plate of the present invention.

Wherein: 1. a liquid injection cup assembly; 2. a fixing plate; 3. a seal structure assembly; 4. a cylinder assembly; 5. an electric core; 6. positioning a clamp; 7. a liquid injection port; 8. an explosion-proof valve; 9. a liquid injection nozzle; 10. a fixed block; 31. a sealing block; 32. sealing the air tap; 33. a seal ring; 311. a card slot; 61. a flange.

Detailed Description

As shown in fig. 1-4, the novel liquid injection structure of the present embodiment includes a liquid injection cup assembly 1, a liquid injection nozzle 9 is disposed at the end of a liquid injection pipe of the liquid injection cup assembly 1, a sealing structure assembly 3 is fixedly connected to the liquid injection nozzle 9, and the sealing structure assembly 3 has a structure for sealing the explosion-proof valve 8 of the battery cell 5 from the outside and applying positive pressure.

Annotate the lower extreme of liquid cup subassembly 1 and be equipped with the fixed plate 2 that supplies to annotate liquid mouth 9 and pass, seal structure subassembly 3 seals electric core 5 explosion-proof valve 8 from the outside and exerts the structure of positive pressure and do: including the sealed piece 31 of fixed mounting at fixed plate 2 lower surface, sealed piece 31 lower surface is equipped with the recess, and the recess bottom surface is equipped with the through-hole, installs sealed air cock 32 in the through-hole, and the marginal round of recess is equipped with the draw-in groove 311 of installation sealing washer 33.

The lower surface of the fixing plate 2 on the side of the sealing block 31 is provided with a fixing block 10 for fixing the liquid injection nozzle 9, and the liquid injection nozzle 9 extends out of the lower surface of the fixing block 10.

The air inlet end of the sealing nozzle 32 extends out of the upper surface of the fixing plate 2.

The two sides of the fixed plate 2 are respectively provided with a cylinder component 4.

The battery cell 5 is fixed by a positioning clamp 6, and a flange 61 matched with the execution end of the cylinder assembly 4 is arranged on the positioning clamp 6.

Annotate liquid cup subassembly 1 and be equipped with two at least, be equipped with respectively in the positioning fixture 6 with annotate the fixed position of two at least electric cores that liquid cup subassembly 1 corresponds.

The utility model discloses in the implementation, when needs annotate the liquid, cylinder assembly 4 snatches positioning fixture 6, makes annotate the position of annotating liquid mouth 7 that annotates liquid mouth 9 and aim at electric core 5, and seal structure assembly 3 aims at the explosion-proof valve 8 position on the electric core 5, and the recess of sealed piece 31 surrounds explosion-proof valve 8 and compresses tightly to it is sealed through sealing washer 33. Then the electrolyte is injected into the battery cell 5 through the high positive pressure by the electrolyte injection cup component 1, and at this time, the high positive pressure is also added on the surface of the battery cell 5 outside the explosion-proof valve 8 through the sealing air tap 32 of the sealing structure component 3, so that the internal and external pressure difference is maintained within 0.3MPa, for example, the pressure of the electrolyte injected into the battery cell 5 through the high positive pressure by the electrolyte injection cup component 1 is 0.5MPa, the high positive pressure of the sealing air tap 32 on the surface of the battery cell 5 outside the explosion-proof valve 8 is 0.2MPa, the internal and external pressure difference is still maintained at 0.3MPa, that is, the explosion-proof valve 8 is in the normal working pressure range, but at this time, the upper limit of the high positive pressure injection pressure can be increased to more than 0.3.

The above description is for the purpose of explanation and not limitation of the invention, which is defined in the claims, and any modifications may be made within the scope of the invention.

Claims

1. The utility model provides a novel annotate liquid structure which characterized in that: including annotating liquid cup subassembly (1), annotate the liquid pipe end of annotating liquid cup subassembly (1) and be equipped with notes liquid mouth (9), annotate fixedly connected with seal structure subassembly (3) on liquid mouth (9), seal structure subassembly (3) have from the outside to electric core (5) explosion-proof valve (8) seal and exert the structure of normal pressure.

2. The novel injection structure of claim 1, wherein: annotate the lower extreme of liquid cup subassembly (1) and be equipped with fixed plate (2) that confession liquid injection mouth (9) passed, seal structure subassembly (3) are sealed and are exerted the structure of positive pressure to electric core (5) explosion-proof valve (8) from the outside and do: including sealed piece (31) of fixed mounting at fixed plate (2) lower surface, sealed piece (31) lower surface is equipped with the recess, the recess bottom surface is equipped with the through-hole, installs sealed air cock (32) in the through-hole, and the marginal round of recess is equipped with draw-in groove (311) of installation sealing washer (33).

3. The novel injection structure of claim 2, wherein: the lower surface of the fixing plate (2) positioned on one side of the sealing block (31) is provided with a fixing block (10) for fixing the liquid injection nozzle (9), and the liquid injection nozzle (9) extends out of the lower surface of the fixing block (10).

4. The novel injection structure of claim 2, wherein: the air inlet end of the sealing air nozzle (32) extends out of the upper surface of the fixing plate (2).

5. The novel injection structure of any of claims 2 to 4, wherein: and air cylinder assemblies (4) are respectively arranged on two sides of the fixing plate (2).

6. The novel injection structure of claim 5, wherein: the battery cell (5) is fixed by a positioning clamp (6), and a flange (61) matched with the execution end of the air cylinder assembly (4) is arranged on the positioning clamp (6).

7. The novel injection structure of claim 6, wherein: annotate liquid cup subassembly (1) and be equipped with two at least, be equipped with respectively in positioning fixture (6) with annotate the fixed position of two at least electric cores that liquid cup subassembly (1) corresponds.