CN-122025682-A - Isostatic pressing device for soft-package solid-state battery and gas isostatic pressing method for soft-package solid-state battery

CN122025682ACN 122025682 ACN122025682 ACN 122025682ACN-122025682-A

Abstract

The invention provides an isostatic pressing device for a soft-packaged solid-state battery and a gas isostatic pressing method for the soft-packaged solid-state battery, wherein the isostatic pressing device comprises a compressed air source supply device, an isostatic pressing cavity device, a pressurizing system, a control system and a vacuumizing device, the compressed air source supply device is communicated with the pressurizing system, the isostatic pressing cavity device is communicated with the pressurizing system, the vacuumizing device is communicated with the isostatic pressing cavity device, and the control system is used for controlling the compressed air source supply device, the isostatic pressing cavity device, the pressurizing system and the vacuumizing device. The device and the method effectively improve the density of the soft-packaged solid-state battery and enhance the interface contact of the solid-state battery, thereby improving the performance of the soft-packaged solid-state battery.

Inventors

Cai Weihu
JIANG ZHENYU
LU XIUYUAN

Assignees

广东屏安新能源科技有限公司

Dates

Publication Date: 20260512
Application Date: 20260320

Claims (10)

1. An isostatic device for soft-pack solid-state batteries, characterized in that: The device comprises a compressed air source supply device, an isostatic cavity device, a pressurizing system, a control system and a vacuumizing device, wherein the compressed air source supply device is communicated with the pressurizing system, the isostatic cavity device is communicated with the pressurizing system, the vacuumizing device is communicated with the isostatic cavity device, and the control system is used for controlling the compressed air source supply device, the isostatic cavity device, the pressurizing system and the vacuumizing device; The isostatic pressing cavity device comprises a pressing plate and a plurality of isostatic pressing cavities, wherein the pressing plate is arranged above the isostatic pressing cavities and can move in abutting connection with the tops of the isostatic pressing cavities or away from the isostatic pressing cavities; The isostatic cavity comprises an isostatic frame body, an isostatic sealing plug cover and a heating module, wherein the isostatic sealing plug cover is used for sealing the isostatic frame body, the heating module is sleeved outside the isostatic frame body, a soft-package solid-state battery can be placed in the isostatic frame body, and the isostatic frame body is communicated with the pressurizing system and the vacuumizing device.
2. An isostatic device for soft pack solid state batteries as claimed in claim 1, wherein: The isostatic pressing cavity device further comprises a first pressing piece, the first pressing piece comprises a pressing screw rod and an operation handle, the pressing screw rod is connected with the pressing plate, and the operation handle drives the pressing plate to move up and down.
3. An isostatic device for soft pack solid state batteries as claimed in claim 1, wherein: the isostatic pressing cavity device further comprises a second pressing part, the second pressing part comprises a pressing quick clamp and a pressing rod, the pressing rod can be in butt joint with the pressing plate, the pressing quick clamp drives the pressing rod to move up and down, and at least one second pressing part is correspondingly arranged on each isostatic pressing cavity.
4. An isostatic device for soft-pack solid state batteries as claimed in any one of claims 1-3, wherein: The part of the isostatic sealing plug cover can extend into the isostatic pressing frame body, the other part of the isostatic sealing plug cover covers the top of the isostatic pressing frame body, a sealing gasket is sleeved on the part of the isostatic sealing plug cover extending into the isostatic pressing frame body, the upper surface of the sealing gasket is abutted to the part of the isostatic sealing plug cover covering the top of the isostatic pressing frame body, and the outer diameter of the sealing gasket is larger than the opening diameter of the isostatic pressing frame body.
5. An isostatic device for soft pack solid state batteries as claimed in claim 4, wherein: And at least one layer of sealing ring is sleeved on the part of the isostatic sealing plug cover extending into the isostatic pressing frame body, and the outer diameter of the sealing ring is matched with the inner diameter of the isostatic pressing frame body.
6. An isostatic device for soft-pack solid state batteries as claimed in any one of claims 1-3, wherein: The isostatic pressing cavity further comprises a material frame, wherein the material frame is provided with a plurality of soft package solid-state battery placement positions, and the material frame is placed in the isostatic pressing frame.
7. An isostatic device for soft-pack solid state batteries as claimed in any one of claims 1-3, wherein: the isostatic pressing cavity device further comprises a base and a shell, wherein the base is provided with placing grooves matched with the isostatic pressing cavities in number, and the isostatic pressing cavities are placed on the placing grooves; The shell is arranged outside the isostatic pressing cavity and the pressing plate.
8. An isostatic device for soft pack solid state batteries as defined in claim 7, wherein: the shell comprises a top plate and a peripheral protective door, wherein the peripheral protective door can be opened and is made of transparent materials.
9. A gas isostatic method for a soft-pack solid-state battery, characterized in that the gas isostatic method is realized by an isostatic device for a soft-pack solid-state battery as claimed in any one of claims 1 to 8, comprising the steps of: s1, placing a soft package solid-state battery in an isostatic pressing frame; S2, covering an isostatic pressing sealing plug cover, enabling a pressing plate to be in butt joint with the isostatic pressing sealing plug cover, and enabling the isostatic pressing cavity to be sealed; s3, setting a heating temperature to enable a heating module to heat the isostatic pressing cavity; S4, setting a vacuum degree pressure value, starting a vacuumizing device, vacuumizing the isostatic pressing cavity to the vacuum degree pressure value, and stopping vacuumizing; S5, operating a compressed air source supply device to generate low-pressure compressed air, wherein the low-pressure compressed air enters the pressurizing system for pressure setting and then enters the isostatic pressing cavity for uniformly pressing the soft-package solid-state battery, and the pressure setting comprises a plurality of pressure values and pressure stages with different time; and S6, after the isostatic pressing is finished, the compacting plate is far away from the isostatic pressing cavity, the isostatic pressing sealing plug cover is opened, and the finished soft package solid-state battery is taken out.
10. A gas isostatic method for a soft pack solid state battery as claimed in claim 9, wherein: The pressure setting in step S5 is specifically: the first pressure stage, wherein the isostatic pressure value is 0-5 MPa, and the pressing time is more than 120min; The second pressure stage, wherein the isostatic pressure value is more than 90MPa, and the pressing time is less than 1min; The third pressure stage, wherein the isostatic pressure value is 0-5 MPa, and the pressing time is 0-10 min; and in the fourth pressure stage, the isostatic pressure value is 0MPa, and the pressing time is 0-1 min.

Description

Isostatic pressing device for soft-package solid-state battery and gas isostatic pressing method for soft-package solid-state battery Technical Field The invention relates to the field of battery preparation, in particular to an isostatic pressing device for a soft-package solid-state battery and a gas isostatic pressing method for the soft-package solid-state battery. Background The technology is also continually and iteratively upgraded in the battery industry. With the increasing demands of the market for battery performance, conventional manufacturing processes have been difficult to adapt to the demands. At present, the battery is prepared by using liquid such as oil/water as a pressurizing medium, but the soft package solid-state battery is easy to be polluted by the liquid. Moreover, the liquid is almost incompressible, the pressurization process is realized mainly by mechanical displacement (such as plunger pushing), and the speed is limited by the reciprocating frequency of the pump and the inertia of the fluid, so that the response is relatively slow, the pressure rising time is long, and the efficiency is influenced. In addition, the liquid container, the pump station and the safety system are high in manufacturing cost and maintenance cost. In addition, the hydraulic oil has combustibility and certain danger. Therefore, the novel battery preparation device and the novel battery preparation method avoid liquid pollution to the soft-package solid-state battery, improve the production efficiency and the production safety of the soft-package solid-state battery, and reduce the production and maintenance cost. Disclosure of Invention The invention aims to provide an isostatic pressing device for a soft-packaged solid-state battery, which is used for solving the problems that the existing battery preparation device and method are easy to be polluted by liquid, low in production efficiency and poor in safety. A second object of the present invention is to provide a gas isostatic method for a soft-pack solid-state battery, which is achieved by an isostatic device for a soft-pack solid-state battery as described above. In order to achieve the first object, the invention provides an isostatic pressing device for a soft-packaged solid-state battery, which comprises a compressed air source supply device, an isostatic pressing cavity device, a pressurizing system, a control system and a vacuumizing device, wherein the compressed air source supply device is communicated with the pressurizing system, the isostatic pressing cavity device is communicated with the pressurizing system, the vacuumizing device is communicated with the isostatic pressing cavity device, the control system is used for controlling the compressed air source supply device, the isostatic pressing cavity device, the pressurizing system and the vacuumizing device, the isostatic pressing cavity device comprises a pressing plate and a plurality of isostatic pressing cavities, the pressing plate is arranged above the isostatic pressing cavities, the pressing plate can move in abutting connection with the top of the isostatic pressing cavities or away from the isostatic pressing cavities, the isostatic pressing cavities comprise an isostatic pressing frame body, an isostatic pressing sealing plug cover and a heating module, the isostatic pressing sealing plug cover is used for sealing the isostatic pressing frame body, the heating module is sleeved outside the isostatic pressing frame body, the soft-packaged solid-state battery can be placed in the isostatic pressing frame body, and the isostatic pressing frame body is communicated with the pressurizing system and the vacuumizing device. According to the scheme, the isostatic pressing device does not adopt liquid such as oil/water as a pressing medium, so that the soft-package solid-state battery is free from liquid pollution, the liquid has combustibility, the production safety is improved, the pressing medium is from air, the air can be directly obtained, additional devices and material cost are not needed, the cost is saved, the air can be directly discharged, the pollution is avoided, and the processing space and the cost are saved. The sealing reliability of the isostatic pressing cavity is guaranteed by arranging a plurality of isostatic pressing cavities and the pressing plates, and the isostatic pressing cavities can be carried out simultaneously, so that the production efficiency is improved. And the isostatic pressing cavity is provided with a heating module, so that temperature regulation and control can be synchronously realized, and the vacuum pumping device and the pressurizing system are matched, so that the density of the soft-packaged solid-state battery is effectively improved, the interface contact of the solid-state battery is enhanced, and the performance of the soft-packaged solid-state battery is improved. The isostatic pressing cavity device further comprises a first pres