CN-224224601-U - Isostatic pressing device and battery production equipment

CN224224601UCN 224224601 UCN224224601 UCN 224224601UCN-224224601-U

Abstract

The application relates to an isostatic pressing device and battery production equipment, wherein the isostatic pressing device comprises a shell, a holding assembly and a clamping assembly, wherein the shell is provided with a containing cavity, the holding assembly is arranged in the containing cavity and comprises at least two clamping plates, each clamping plate comprises a plate body and elastic cushion blocks, the plate bodies are arranged at intervals along a first direction, each plate body is provided with a through hole in a penetrating mode along the first direction, each elastic cushion block is arranged on the plate body in a protruding mode towards a corresponding holding space along the first direction, the projection of an electrode assembly falls into the projection range of the through hole and falls into the projection range of a film layer, and the holding spaces are respectively communicated with the containing cavity along the first direction, the second direction and the third direction. The pressure medium can uniformly flow into the clamping space, so that the whole battery unit is pressed consistently and the pressure is larger, the consistency and the densification degree of densification are improved, and in addition, the problems of appearance damage or local stress concentration of the battery unit can be reduced.

Inventors

LUO HONGSI
Chen Lianxiong
WU YICHEN

Assignees

宁德时代新能源科技股份有限公司

Dates

Publication Date: 20260512
Application Date: 20260227

Claims (8)

1. An isostatic pressing device for isostatic pressing of battery cells, the device comprising: a housing having a receiving chamber for receiving a pressure medium, and The clamping assembly is arranged in the accommodating cavity and comprises at least two clamping plates, each clamping plate comprises a plate body and elastic cushion blocks, the plate bodies are arranged at intervals along a first direction to form clamping spaces for fixing the battery cells between every two adjacent plate bodies, each plate body is provided with a through hole communicated between the clamping space and the accommodating cavity in a penetrating way along the first direction, each plate body is provided with a plurality of elastic cushion blocks, the elastic cushion blocks are distributed at intervals around the periphery of the corresponding through hole, and each elastic cushion block is arranged on the plate body in a protruding way towards the corresponding clamping space along the first direction; The battery unit comprises an electrode assembly and a film layer coated on the periphery of the electrode assembly, wherein in the first direction, the projection of the electrode assembly falls into the projection range of the through flow opening, and the projection of the through flow opening falls into the projection range of the film layer; The clamping space is communicated with the accommodating cavity along the first direction, the second direction and the third direction respectively, and the first direction, the second direction and the third direction are perpendicular to each other.
2. The isostatic pressing arrangement as claimed in claim 1, wherein each of the resilient pads protrudes from the corresponding plate body in the first direction by a thickness of not less than 25 μm.
3. The isostatic pressing arrangement as claimed in claim 1, wherein the material of each of said resilient pads is a high temperature resistant material.
4. An isostatic arrangement as claimed in claim 3, wherein the heat resistant temperature of each said resilient pad is not less than 120 ℃.
5. The isostatic pressing arrangement as claimed in claim 1, wherein the material of each plate body is a corrosion resistant metallic material.
6. The isostatic pressing arrangement as defined in claim 1, wherein the clamping assembly further comprises a plurality of connectors, each of the connectors being connected between the clamping plates in the first direction, and all of the connectors being spaced apart along the circumference of the flow passage.
7. The isostatic pressing arrangement as claimed in claim 6, wherein a plurality of connecting holes are formed in each clamping plate in a penetrating manner along the first direction, and each connecting hole is arranged at intervals along the circumferential direction of the through-flow port; The clamping assembly further comprises locking pieces, each connecting piece penetrates through the corresponding connecting hole along the first direction, and the locking pieces are locked at least one end of the corresponding connecting piece along the first direction.
8. A battery production apparatus comprising an isostatic pressing device as claimed in any one of claims 1-7.

Description

Isostatic pressing device and battery production equipment Technical Field The application relates to the technical field of batteries, in particular to an isostatic pressing device and battery production equipment. Background In the production process of the solid-state battery, isostatic pressing treatment is needed to be carried out on the battery monomer, so that the pole piece and the solid electrolyte can be closely contacted, and densification of the solid-state battery is realized. However, in the current isostatic pressing device, in the process of densification treatment of the battery monomer, the pressure medium is difficult to uniformly cover the surface of the battery monomer, so that uneven pressure is caused, the densification effect is affected, the battery monomer is easily damaged, and the service performance of the battery monomer is affected. Disclosure of utility model Based on this, it is necessary to provide an isostatic pressing device and a battery production device, which are required to solve the problems that in the conventional isostatic pressing device, in the process of densification treatment of a battery cell, a pressure medium is difficult to uniformly cover the surface of the battery cell, so that uneven pressure is caused, the densification effect is affected, the battery cell is easily damaged, and the service performance of the battery cell is affected. The application provides an isostatic pressing device which is used for carrying out isostatic pressing treatment on a battery monomer, and comprises a shell and a clamping assembly, wherein the shell is provided with a containing cavity for containing a pressure medium, the clamping assembly is arranged in the containing cavity and comprises at least two clamping plates, each clamping plate comprises a plate body and elastic cushion blocks, the plate bodies are arranged at intervals along a first direction so as to form a clamping space for fixing the battery monomer between every two adjacent plate bodies, the plate bodies are penetrated and provided with through flow openings communicated between the clamping space and the containing cavity along the first direction, each plate body is provided with a plurality of elastic cushion blocks, and each elastic cushion block is distributed at intervals around the periphery of the corresponding through flow opening; The battery unit comprises an electrode assembly and a film layer coated on the periphery of the electrode assembly, wherein in the first direction, the projection of the electrode assembly falls into the projection range of the through flow opening, and the projection of the through flow opening falls into the projection range of the film layer; The clamping space is communicated with the accommodating cavity along a first direction, a second direction and a third direction respectively, and the first direction, the second direction and the third direction are mutually perpendicular. Through the structure, when the battery monomer is placed in the clamping space, the clamping space is communicated with the accommodating cavity along the first direction, the second direction and the third direction respectively, so that pressure medium in the accommodating cavity can uniformly flow into the clamping space and fully contact with each surface of the battery monomer, the whole battery monomer is pressed consistently and the pressure is larger, and the consistency and the compactness degree of densification are improved. In addition, because the contact area between the clamping component and the battery monomer is smaller, the problem of appearance damage or local stress concentration of the battery monomer caused by physical contact can be reduced, and the service performance of the battery monomer is effectively improved. Through setting up the elasticity cushion, can increase with the frictional force between the solid-state battery monomer, more stable centre gripping solid-state battery monomer. And each elastic cushion block is distributed at intervals around the periphery of the corresponding through flow port, so that the dual functions of firmly clamping the solid-state battery monomer and reserving a smooth channel for the flow of pressure medium can be realized. In addition, through setting up each splint along first direction interval, make every adjacent two clamping space between the splint all can follow second direction and third direction and hold the chamber intercommunication to through the flow port on each splint along first direction and hold the chamber intercommunication, can make the pressure medium who holds in the chamber more evenly flow into clamping space, improve the uniformity and the degree of densification. In addition, since each clamping plate is in a zigzag structure, the contact area with the solid-state battery cell can be reduced, and thus the problems of appearance damage or local stress concentration of the battery cell caus