CN-224217689-U - Liquid injection nozzle, liquid injection nozzle mechanism and liquid injection device

Abstract

The utility model relates to a liquid injection nozzle, a liquid injection nozzle mechanism and a liquid injection device. The middle part of the end face of the first end of the liquid injection nozzle is provided with a boss, and the end face of the first end of the liquid injection nozzle forms a supporting plane along the circumferential direction of the boss. When the electrolyte is injected, the boss stretches into the electrolyte injection hole on the shell and abuts against the surface of the shell in a sealing fit mode, and electrolyte in the electrolyte injection cup can be injected into the electrolyte injection hole through the electrolyte injection channel. The supporting plane and the shell are matched to form a seal between the liquid injection nozzle and the liquid injection hole, and compared with the traditional sealing mode that the outer end face of the cone shape is in compression joint with the edge of the liquid injection hole, the supporting plane and the shell have larger contact area, so the sealing effect is better, and the liquid injection nozzle is deviated in a certain range relative to the liquid injection hole and does not influence the sealing effect. In addition, the boss does not influence the sealing effect after being worn in the liquid injection process. Therefore, the liquid injection nozzle mechanism and the liquid injection device can improve the air tightness during liquid injection.

Inventors

• Request for anonymity

Assignees

• 无锡先导智能装备股份有限公司

Dates

Publication Date

20260508

Application Date

20250521

Claims (12)

1. 1. The liquid injection nozzle is characterized by comprising a first end and a second end which are oppositely arranged, a boss is formed in the middle of the end face of the first end of the liquid injection nozzle, an abutting plane is formed on the end face of the first end of the liquid injection nozzle along the circumferential direction of the boss, a liquid injection channel is formed in the liquid injection nozzle, and the liquid injection channel extends to the end face of the boss.
2. 2. The nozzle of claim 1, wherein the nozzle is capable of extending into a fill hole in the housing, and wherein the abutment surface is capable of sealingly engaging a surface of the housing and providing a gap between the end surface of the boss and a step of the fill hole.
3. 3. The nozzle of claim 1, wherein the boss is cylindrical.
4. 4. A nozzle as claimed in claim 3, wherein the boss is concentric with the nozzle.
5. 5. The nozzle of claim 1, wherein the nozzle is capable of elastic deformation.
6. 6. A nozzle mechanism comprising a pouring cup and a nozzle according to any one of claims 1 to 5, wherein the second end of the nozzle is connected to the pouring cup.
7. 7. The nozzle mechanism according to claim 6, wherein, the liquid injection nozzle mechanism further comprises a connecting piece arranged between the liquid injection cup and the liquid injection nozzle, and the liquid injection nozzle is detachably arranged on the connecting piece.
8. 8. The nozzle mechanism of claim 7, wherein an end face of the second end of the nozzle is formed with a mounting hole, a side wall of the mounting hole is partially recessed inward and forms an annular clamping groove, the connecting piece is formed with a convex column, the convex column is formed with an annular convex block protruding in the radial direction, and the convex column penetrates through the mounting hole and enables the annular convex block to be in interference fit with the annular clamping groove.
9. 9. The nozzle mechanism of claim 8, wherein the end surface of the connecting member is formed with a receiving groove along the circumferential direction of the boss, and the second end of the nozzle is inserted into the receiving groove.
10. 10. The liquid injection nozzle mechanism according to claim 6, wherein two ends of the liquid injection cup are respectively provided with a liquid inlet valve and a liquid outlet valve, and the liquid injection nozzle is communicated with the liquid injection cup through the liquid outlet valve.
11. 11. The nozzle mechanism of any one of claims 6 to 10, wherein the nozzle is capable of extending into a nozzle hole of a lithium battery, and the abutment plane is capable of sealing and attaching to a housing of the lithium battery, and a gap is formed between an end surface of the boss and a step of the nozzle hole.
12. 12. A priming device comprising a nozzle mechanism as claimed in any one of claims 6 to 11.

Description

Liquid injection nozzle, liquid injection nozzle mechanism and liquid injection device Technical Field The utility model relates to the technical field of lithium batteries, in particular to a liquid injection nozzle, a liquid injection nozzle mechanism and a liquid injection device. Background The liquid injection is an important process in the manufacturing process of the lithium battery, and a liquid injection nozzle is generally inserted into a liquid injection port to finish liquid injection. The common liquid injection nozzle is arranged into a cone shape, and the diameter of the outer circle of the bottom of the liquid injection nozzle is smaller than that of the sinking table of the liquid injection nozzle, so that the conical outer end surface of the liquid injection nozzle can be in pressure connection with the edge of the sinking table and realize contact sealing. The sealing effect between the liquid injection nozzle and the edge of the sinking platform depends on higher positioning precision, and the liquid injection nozzle and the liquid injection port are required to realize concentric alignment. However, the liquid injection nozzle is small in diameter and is easy to wear and deform after long-time use, so that concentricity of the liquid injection nozzle and the liquid injection nozzle cannot be ensured, and the problem of unqualified air tightness in the liquid injection process is caused. Disclosure of utility model In view of the above, it is necessary to provide a liquid filling nozzle, a liquid filling nozzle mechanism, and a liquid filling apparatus that can improve the air tightness during liquid filling. The liquid injection nozzle comprises a first end and a second end which are oppositely arranged, a boss is formed in the middle of the end face of the first end of the liquid injection nozzle, an abutting plane is formed on the end face of the first end of the liquid injection nozzle along the circumferential direction of the boss, a liquid injection channel is formed in the liquid injection nozzle, and the liquid injection channel extends to the end face of the boss. In one embodiment, the liquid injection nozzle can extend into the liquid injection hole on the shell, the abutting plane can be in sealing fit with the surface of the shell, and a gap is formed between the end face of the boss and the step of the liquid injection hole. In one embodiment, the boss is cylindrical. In one embodiment, the boss is disposed concentric with the nozzle. In one embodiment, the nozzle is capable of elastic deformation. A pouring spout mechanism comprising a pouring cup and a pouring spout according to any one of the above preferred embodiments, the second end of the pouring spout being connected to the pouring cup. In one embodiment, the pouring nozzle mechanism further comprises a connecting piece arranged between the pouring cup and the pouring nozzle, and the pouring nozzle is detachably mounted on the connecting piece. In one embodiment, an end face of the second end of the liquid injection nozzle is provided with a mounting hole, a side wall of the mounting hole is partially recessed inwards to form an annular clamping groove, the connecting piece is provided with a convex column, the convex column is provided with an annular convex block protruding in the radial direction, and the convex column penetrates through the mounting hole to enable the annular convex block to be in interference fit with the annular clamping groove. In one embodiment, the end surface of the connecting piece is formed with a containing groove along the circumferential direction of the convex column, and the second end of the liquid injection nozzle is inserted into the containing groove. In one embodiment, two ends of the liquid injection cup are respectively provided with a liquid inlet valve and a liquid outlet valve, and the liquid injection nozzle is communicated with the liquid injection cup through the liquid outlet valve. In one embodiment, the liquid injection nozzle can extend into a liquid injection hole of the lithium battery, the abutting plane can be in sealing fit with a shell of the lithium battery, and a gap is formed between the end face of the boss and a step of the liquid injection hole. A priming device comprising a priming nozzle mechanism as in any one of the preceding preferred embodiments. Above-mentioned annotate liquid mouth, annotate liquid mouth mechanism and annotate liquid device, when annotating the liquid, the boss stretches into the notes liquid hole on the shell and supports the sealed laminating of plane and the surface of shell, annotates the electrolyte in the liquid cup and just can annotate in the liquid hole through annotating the liquid passageway. The supporting plane and the shell are matched to form a seal between the liquid injection nozzle and the liquid injection hole, and compared with the traditional sealing mode that the outer end face of the cone shape is in compr