CN-224217570-U - Sealing top cover capable of circularly injecting liquid and battery

Abstract

The utility model relates to a sealing top cover capable of circularly injecting liquid and a battery, wherein the sealing top cover comprises a cover plate main body, a fusible rubber plug and a connecting plate, a functional hole is formed in the cover plate main body, threads are formed in the side wall of the functional hole, threads matched with the functional hole are formed in the side wall of the fusible rubber plug, the fusible rubber plug comprises a torsion block arranged at the top end, the torsion block comprises two plane parts which are oppositely arranged at two sides, the connecting plate is arranged on the bottom surface of the cover plate main body, a diversion pressure relief groove is formed in the connecting plate, a plurality of first through holes are formed in the groove bottom of the diversion pressure relief groove, sealing glue is coated in a thread gap of the fusible rubber plug, and the fusible rubber plug is in threaded bonding with the functional hole so that the functional hole is sealed. The battery comprises the sealing top cover. According to the utility model, by arranging the fusible rubber plug, repeated liquid injection can be realized, the pressure release requirement of the battery can be met when the battery is out of control, and the safety is improved.

Inventors

• LI JIANJU
• YI PENG
• QIU YISHENG

Assignees

• 惠州科达利精密工业有限公司

Dates

Publication Date

20260508

Application Date

20250410

Claims (9)

1. 1. A sealing cap for a recyclable electrolyte, disposed on a battery, comprising: The cover plate main body is provided with a functional hole, and the side wall of the functional hole is provided with threads; The side wall of the fusible rubber plug is provided with threads matched with the functional holes, the fusible rubber plug comprises a torsion block arranged at the top end, and the torsion block comprises two plane parts which are oppositely arranged at two sides; the connecting plate is arranged on the bottom surface of the cover plate main body, a diversion pressure relief groove is formed in the connecting plate, and a plurality of first through holes are formed in the bottom of the diversion pressure relief groove; And the fusible rubber plug is in threaded bonding with the functional hole, so that the functional hole is sealed.
2. 2. The seal cap of claim 1, wherein the fusible rubber plug is a rubber plug.
3. 3. The seal top cover according to claim 1, wherein a boss is provided on a top surface of the cover plate main body, and the functional hole penetrates the boss in a vertical direction.
4. 4. The seal cap of claim 1, wherein the first through hole is vertically offset from the functional hole.
5. 5. The seal cap of claim 1, wherein the web is provided with a support slot that mates with the functional aperture, the shunt relief slot passing through the support slot.
6. 6. The seal top cover of claim 1, wherein a plurality of second through holes are formed in a sidewall of the split pressure relief groove.
7. 7. The seal cap of claim 1, wherein the connection plate is provided on both sides with connection portions for connection with the battery.
8. 8. The seal cap of claim 1, further comprising two posts, the two posts being mounted through the cover body and the connection plate.
9. 9. A battery comprising a seal cap according to any one of claims 1 to 8.

Description

Sealing top cover capable of circularly injecting liquid and battery Technical Field The utility model relates to the technical field of batteries, in particular to a sealing top cover capable of circularly injecting liquid and a battery. Background In the use process of the lithium ion battery, along with the charge and discharge circulation of the lithium ion battery, the capacity of the lithium ion battery can be gradually attenuated, and electrolyte in the battery can be lost to influence the performance of the battery. The top cover of the battery is usually provided with a liquid injection hole and an explosion-proof valve, the explosion-proof valve is used for releasing pressure of the battery core, the structure of the explosion-proof valve is usually complex, the processing is troublesome, the liquid injection hole is used for injecting electrolyte into the battery, at present, after the electrolyte is injected into the square battery, a sealing nail is plugged into the liquid injection hole for welding to seal the battery, but the welding sealing is irreversible, so that no path is formed on the battery for secondary liquid injection, the performance of the battery can be continuously influenced due to the reduction of the electrolyte in the battery, and in addition, the electrolyte has a certain flow rate and pressure during injection, if the electrolyte directly impacts the battery, the pole piece or the diaphragm can be damaged, and the quality of the battery is influenced. Disclosure of utility model Accordingly, the present utility model is directed to a sealing cap and a battery capable of circulating injection. The utility model provides a but sealed top cap of circulation notes liquid sets up on the battery, it includes apron main part, fusible plug and connecting plate, be equipped with the function hole in the apron main part, be equipped with the screw thread on the lateral wall of function hole, be equipped with on the lateral wall of fusible plug with function hole matched with screw thread, fusible plug is including locating the piece of turning round on top, turn round the piece including locating two plane portions of both sides relatively, the connecting plate install in the bottom surface of apron main part, be equipped with reposition of redundant personnel pressure release groove on the connecting plate, the tank bottom in reposition of redundant personnel pressure release groove is opened there is a plurality of first through-holes, wherein, scribble the sealant in the screw thread clearance of fusible plug, fusible plug with function hole screw thread bonding makes the function hole is sealed. Among the above-mentioned technical scheme, fusible rubber plug passes through screw thread fastening connection with the function hole, scribbles the sealant on the screw thread in fusible rubber plug outside, can strengthen the steadiness of connection, prevents not hard up in the use, simultaneously, in the clearance of screw thread can be filled to the sealant, strengthens the leakproofness. The top of fusible plug is equipped with turns round the piece, when the installation, the accessible mounting tool centre gripping turns round the plane portion of piece both sides, with fusible plug screw in function downthehole, easy operation is convenient, when need carry out secondary annotate the liquid to the battery, utilize the mounting tool to dismantle the fusible plug back, rethread function hole is to the inside notes liquid of battery, wherein, the reposition of redundant personnel relief groove is located the below of function hole, electrolyte falls into the reposition of redundant personnel relief inslot earlier when annotating from the function hole, the first through-hole water conservancy diversion of reposition of redundant personnel relief groove bottom is inside the battery, in addition, fusible plug selects the material of specific temperature resistant to make, can melt when the temperature rises its fusing point, when battery thermal runaway, fusible plug melts when its inside temperature reaches fusible plug, make function hole and external intercommunication, the function hole is equivalent to the pressure release hole of battery this moment, the inside high temperature high pressure gas of battery can follow the function hole and discharge, reach the effect of pressure release, the condition that the fracture or explosion appear in the battery casing is effectively prevented, the improvement safety in utilization. It should be noted that, because the electrolyte has a certain flow rate and pressure when being injected, if the electrolyte directly impacts the inside of the battery, the pole piece or the diaphragm is possibly damaged, therefore, a diversion pressure relief groove is arranged below the functional hole, the diversion pressure relief groove can play a role in buffering to slow down the flow rate of the electrolyte, meanwhile, a plurality of first through