Gas isostatic pressing device for battery pole piece or solid-state battery

Abstract

The utility model discloses a gas isostatic pressing device for a battery pole piece or a solid-state battery. The isostatic pressing device comprises the following components: a compressed gas source supply device, which is used for generating or providing compressed gas; the air source pressurizing device is connected with the compressed air source supply device and used for pressurizing the pressure intensity of the compressed air source; the pressure applying bin assembly is used for accommodating an aluminum plastic bag filled with a pole piece or a solid-state battery cell, and the pressure applying bin assembly is connected with the gas source pressurizing device so as to receive pressurized gas from the gas source pressurizing device; the pressure releasing device is arranged on the pressure applying bin assembly and used for unloading the pressure in the pressure applying bin assembly and restoring the pressure to the operable pressure; and the pressure sensor is arranged on the pressure applying bin assembly and used for monitoring the gas pressure intensity in the pressure applying bin assembly. The technical problem to be solved by the utility model is to provide an environment-friendly, efficient and pollution-free isostatic pressing device for a battery pole piece or a solid-state battery so as to meet the high-quality requirement in the battery production process.

Description

Technical Field

[0001] The utility model relates to a battery manufacturing process and related equipment, and in particular to a gas isostatic pressure device for battery pole pieces or solid-state batteries. Background Art

[0002] With the rapid development of science and technology, the battery industry is also constantly improving and innovating. In particular, the emergence of lithium-ion batteries has greatly promoted the development of electric vehicles, portable electronic devices and other fields. However, with the continuous improvement of battery performance requirements, traditional manufacturing processes can no longer meet market demand. Therefore, researchers have been exploring new battery manufacturing technologies to meet the needs of the future energy field.

[0003] Patent number CN 208589491U provides an electrode sheet processing device, which uses a hydraulic cylinder or an oil cylinder to apply pressure, and the compression medium is liquid, which can easily cause the workpiece to be pressed to be contaminated by the liquid; and although the electrode to be pressed is placed in an aluminum-plastic bag and sealed, the aluminum-plastic bag is not vacuumed, which results in the presence of gas in the aluminum-plastic bag when pressure is applied, resulting in poor pressure effect, a large amount of gas impurities in the finished product, and even the possibility of the aluminum-plastic bag bursting during the pressure application process.

[0004] In this context, the applicant proposed an isostatic pressing device for battery pole pieces or solid-state batteries. This new technology aims to improve the performance and safety of batteries while reducing production costs and environmental pollution. The isostatic pressing method is an efficient processing technology that uniformly presses materials under high temperature and high pressure to achieve ideal density and performance. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide an environmentally friendly, efficient and pollution-free static pressing method and device for battery pole pieces or solid-state batteries, so as to achieve high quality requirements in the battery production process.

[0006] The isostatic pressing equipment involved in the utility model is intended to overcome the shortcomings of the traditional hydraulic pressure method and realize an environmentally friendly, efficient and low-cost battery manufacturing process. The equipment is composed of a pressure chamber assembly, a compressed air source supply device, an air source booster device, an air source control valve, a pressure release device and a pressure sensor. The pressure and maintenance time can be adjusted as needed to ensure that the battery pole piece or the battery cell of the solid-state battery is formed under uniform conditions. In addition, the equipment does not require hydraulic oil, water or other liquids for pressure application, and does not pollute the environment and products, greatly reducing production costs and maintenance difficulties.

[0007] Moreover, the isostatic pressing device of the utility model can be used for processing (compacting) battery pole pieces or solid-state batteries. By using gas as the pressure medium, the pollution problem of the environment and products caused by the liquid used in the traditional hydraulic method is avoided, while improving production efficiency and product quality.

[0008] The purpose of the utility model can be achieved through the following technical solutions.

[0009] The utility model provides an isostatic pressing device for battery pole pieces or solid-state batteries, characterized in that the isostatic pressing device comprises the following components:

[0010] Compressed gas source supply device: used to generate or provide compressed gas;

[0011] Gas source boosting device: connected to the compressed gas source supply device, used to boost the pressure of the compressed gas source;

[0012] Pressure chamber assembly: used to contain the aluminum-plastic bag containing the pole piece or the solid-state battery cell, and the pressure chamber assembly is connected to the gas source pressurizing device to receive the pressurized gas from the gas source pressurizing device;

[0013] Pressure release device: It is installed on the pressure chamber assembly and is used to relieve the pressure in the pressure chamber assembly and restore it to an operable pressure;

[0014] Pressure sensor: It is installed on the pressure chamber assembly and is used to monitor the gas pressure in the pressure chamber assembly.

[0015] Optionally, the pressure bin assembly includes a bin body, a bin cover, and a sealing element for sealing the bin body and the bin cover.

[0016] Optionally, a storage rack is also provided in the pressure chamber assembly to facilitate the placement of the workpiece to be pressurized.

[0017] Optionally, the storage rack is fixedly connected to the compartment cover.

[0018] Optionally, the storage rack is fixedly connected to the warehouse body.

[0019] Optionally, the storage rack is in a breathable cylindrical, box-shaped, or basket-shaped shape.

[0020] Optionally, an air source control valve is further provided between the air source boosting device and the pressure chamber assembly to control the on-off of the air source.

[0021] Optionally, the compressed gas source supply device uses dry gas for compression.

[0022] Optionally, the compressed gas source supply device uses inert gas.

[0023] Optionally, the gas source boosting device is selected from one of a gas boosting valve, a gas boosting pump, and a gas pressure pump.

[0024] The operating steps of the isostatic pressing device provided by the utility model are as follows:

[0025] S1: Put the pole piece or solid-state battery cell into an aluminum-plastic bag, and evacuate and seal the aluminum-plastic bag;

[0026] S2: Place the sealed aluminum-plastic bag into the pressure chamber assembly and close the chamber door;

[0027] S3: Set the pressure and holding time;

[0028] S4: Start the pressurization function, the compressed gas source supply device starts to operate to generate compressed gas, and the compressed gas is pressurized by the gas source booster device and supplied to the pressurization chamber component to evenly pressurize the aluminum-plastic bag;

[0029] S5: After the set time is reached, the gas source booster device is turned off and the pressure release device is started to reduce the pressure in the pressure chamber assembly to an operable pressure range;

[0030] S6: Open the door, take out the aluminum-plastic bag, and take out the electrode or solid-state battery cell in the aluminum-plastic bag to obtain a finished product.

[0031] Optionally, the applied pressure is 5-90 MPa, preferably 10-50 MPa.

[0032] Optionally, the pressure is maintained for 1-120 minutes, preferably 5-60 minutes.

[0033] Optionally, the pressure release device reduces the pressure in the pressure chamber assembly to 0.09-0.12 MPa, preferably 0.1-0.12 MPa.

[0034] The technical solution of the utility model has at least one of the following advantages:

[0035] 1. Environmental protection and no pollution: The isostatic pressing device provided by the utility model does not require hydraulic oil, water or other liquids for pressurization, thus avoiding environmental pollution problems and being conducive to green production.

[0036] 2. Advantages of gas pressure: When using gas pressure, you can choose dry gas or inert gas to ensure the quality and performance of battery electrodes or solid-state batteries. At the same time, the gas can be directly discharged into the battery production workshop for use, saving space and time.

[0037] 3. Simple operation and low cost: The design structure of the utility model is simple and easy to operate, and only requires power supply, which reduces the production cost. At the same time, since no additional liquid medium is required, the maintenance cost is relatively low.

[0038] 4. Efficient and stable: By setting the appropriate pressure and maintenance time, effective pressurization treatment of battery pole pieces or solid-state batteries can be achieved to improve product quality and performance. At the same time, the pressure sensor monitors the pressure in the pressure chamber assembly, so that the equipment is always kept within a controllable pressure range during operation, ensuring the stability of the production process.

[0039] 5. Wide range of applications: Since the isostatic pressing device of the utility model does not require liquid medium, it can be widely used in the production process of various types of battery poles or solid-state batteries, thereby improving the versatility and practicality of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 It is a schematic diagram of an embodiment of the gas isostatic pressure device of the utility model.

[0041] Description of the figure number:

[0042] 10 pressure chamber assembly 11 chamber body 12 chamber cover

[0043] 13 Sealing element 14 Storage rack 15 High pressure chamber

[0044] 20 compressed air supply device 30 air source booster device 40 air source control valve

[0045] 50 High-pressure gas source supply inlet 60 Pressure release device 70 Pressure sensor

[0046] 80 Workpiece to be pressed DETAILED DESCRIPTION

[0047] The specific implementation of the utility model is described below. It should be understood that those skilled in the art can conceive of other various implementations and can modify them according to the teachings of this disclosure without departing from the scope or spirit of the utility model. Therefore, the following specific implementation is not restrictive.

[0048] The utility model provides an isostatic pressing device for battery pole pieces or solid-state batteries, characterized in that the isostatic pressing device comprises the following components: a pressure chamber assembly: used for accommodating an aluminum-plastic bag containing pole pieces or solid-state battery cells; a compressed gas source supply device: used for generating or providing compressed gas to provide compressed gas for a gas source boosting device; a gas source boosting device: used for boosting the pressure of the compressed gas source to meet the pressure required for pressurization; a pressure release device: used for unloading the pressure in the pressure chamber assembly and restoring it to an operable pressure; a pressure sensor: used for monitoring the gas pressure in the pressure chamber assembly.

[0049] A specific implementation scheme of the gas isostatic pressure device for battery pole pieces or solid-state batteries of the utility model is described below in conjunction with the accompanying drawings.

[0050] like Figure 1 As shown, the isostatic pressing device for battery electrodes or solid-state batteries of the utility model includes: a pressure chamber assembly 10, a compressed air source supply device 20, an air source booster device 30, an air source control valve 40, a high-pressure air source supply inlet 50, a pressure release device 60, and a pressure sensor 70.

[0051] The pressure chamber assembly 10 is composed of a chamber body 11 and a chamber cover 12, and the chamber body 11 and the chamber cover 12 form a sealed cavity, which is called a high-pressure chamber 15; the chamber cover 12 is provided with a sealing element 13 for sealing the chamber body 11 and the chamber cover 12, and the chamber cover 12 can be removed from the chamber body 11 to put the chamber body 11 in an open state; the chamber cover 12 can also be moved onto the chamber body 11, and together with the chamber body 11 and the sealing element 13, form a high-pressure chamber 15.

[0052] In this embodiment, the pressure chamber assembly 10 is also provided with a high-pressure gas source supply inlet 50, a pressure release device 60 and a pressure sensor 70. The high-pressure gas source supply inlet 50 passes through the chamber body 11, one end is connected to the gas source control valve 40, and the other end passes through the chamber body 11 and communicates with the high-pressure chamber 15. The pressure release device 60 passes through the chamber body 11 to communicate with the high-pressure chamber 15, and is used to release the high pressure in the high-pressure chamber 15 to reduce it to an operable pressure. The pressure sensor 70 is installed on the chamber body 11, and is used to monitor the pressure in the high-pressure chamber 15.

[0053] In this embodiment, an air source pressurizing device 30 is further included, and the air source pressurizing device 30 is connected to the high-pressure air source supply inlet 50 through an air source control valve 40 .

[0054] In this embodiment, a compressed gas source supply device 20 is also included, which can provide or generate compressed gas with a gas pressure of 0.2-20 MPa, preferably 0.6-1.2 MPa. The compressed gas source supply device 20 is connected to the gas source booster device 30 to provide compressed gas for the gas source booster device 30.

[0055] In this embodiment, optionally, a rack 14 is further provided, and the rack 14 is used to place the workpiece 80 to be pressed. In this embodiment, the rack 14 is fixedly connected to the bin cover 12, and when the bin cover 12 is moved out, the rack is also moved out together, so as to facilitate the taking and placing of the workpiece 80 to be pressed; in some other embodiments, the rack 14 may also be fixedly connected to the bin body 11; in some other embodiments, the rack 14 may not be provided.

[0056] In some other embodiments, the air source boosting device 30 may be directly connected to the pressure chamber assembly 10 without using the air source control valve 40.

[0057] In certain other embodiments, the gas isostatic pressing device may further include a control system (not shown in the figure) for controlling the gas isostatic pressing device. The control system may include a pressure control system, a temperature control system, and a safety control system. The pressure control system may monitor the pressure in the pressure chamber assembly in real time, and adjust the air intake speed, air intake pressure, and exhaust speed as needed to maintain the stability of the air pressure. The pressure control system may also filter, cool, and dry the gas to prevent impurities and moisture from affecting the battery performance. The pressure control system may also respond quickly to pressure fluctuations in the pressure chamber assembly, and may accurately control the pressure in the pressure chamber assembly to ensure the accuracy of the processing. The temperature control system may heat or cool the inside of the pressure chamber to ensure that the temperature during the processing is kept within an appropriate range. The safety system may monitor the air pressure, temperature, gas composition, moisture, etc. in the pressure chamber assembly in real time, and issue an alarm when an abnormality occurs. The safety system may also perform emergency exhaust in the pressure chamber assembly when an abnormality occurs to prevent safety accidents caused by excessive air pressure.

[0058] The operation steps of the gas isostatic pressure device of the utility model are as follows:

[0059] S1: Put the pole piece or solid-state battery cell into an aluminum-plastic bag, and evacuate and seal the aluminum-plastic bag;

[0060] S2: Place the sealed aluminum-plastic bag into the pressure chamber assembly and close the chamber door;

[0061] S3: Set the pressure and holding time;

[0062] S4: Start the pressurization function, the compressed gas source supply device starts to operate to generate compressed gas, and the compressed gas is pressurized by the gas source booster device and supplied to the pressurization chamber component to evenly pressurize the aluminum-plastic bag;

[0063] S5: After the set time is reached, the gas source booster device is turned off and the pressure release device is started to reduce the pressure in the pressure chamber assembly to an operable pressure range;

[0064] S6: Open the door, take out the aluminum-plastic bag, and take out the electrode or solid-state battery cell in the aluminum-plastic bag to obtain a finished product.

[0065] Optionally, in the above step S4, the pressure of the compressed air source is controlled to increase slowly from small to large, so that the air pressure after being pressurized by the air source booster device increases slowly, and the gas pressure supplied to the pressure chamber assembly gradually increases slowly to avoid impact on the workpiece to be pressed in the aluminum-plastic bag.

[0066] Optionally, in the above step S4, the flow rate of gas supplied into the pressure chamber assembly can be controlled so that high-pressure gas is slowly supplied into the pressure chamber assembly, thereby ensuring the stability of the pressurization process and performing stable isostatic pressing on the workpiece to be pressed.

[0067] Optionally, in the above step S5, when the pressure release device releases the high-pressure gas in the pressure chamber assembly, the pressure in the pressure chamber assembly is released slowly and evenly by controlling the discharge flow rate of the high-pressure gas.

[0068] By operating the gas isostatic pressing device of the utility model as described above, the active materials inside the battery can be distributed more evenly, thereby improving the energy density of the battery; it can ensure that the active materials inside the battery always maintain good contact during the charging and discharging process, thereby improving the cycle life of the battery; it can also effectively eliminate the stress inside the battery, thereby reducing the risk of safety problems such as short circuit and thermal runaway during the use of the battery. In addition, it can ensure that the performance of each battery meets the design requirements, thereby improving the consistency of the battery.

[0069] Although the utility model has been disclosed as above, the utility model is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the utility model. Therefore, the protection scope of the utility model shall be subject to the scope defined by the claims.

Claims

1. A gas isostatic pressing device for battery pole pieces or solid-state batteries, characterized in that: The isostatic pressing device Includes the following components: Compressed gas source supply device: used to generate or provide compressed gas; Gas source boosting device: connected to the compressed gas source supply device, used to boost the pressure of the compressed gas source; Pressure chamber assembly: used to contain the aluminum-plastic bag containing the pole piece or the solid-state battery cell, and the pressure chamber assembly is connected to the gas source pressurizing device to receive the pressurized gas from the gas source pressurizing device; Pressure release device: It is installed on the pressure chamber assembly and is used to relieve the pressure in the pressure chamber assembly and restore it to an operable pressure; and Pressure sensor: It is installed on the pressure chamber assembly and is used to monitor the gas pressure in the pressure chamber assembly.

2. The gas isostatic pressure device according to claim 1, characterized in that: The pressure bin assembly includes a bin body, a bin cover, and a sealing element for sealing the bin body and the bin cover.

3. The gas isostatic pressure device according to claim 2, characterized in that: The pressure chamber assembly is also provided with a storage rack for placing the workpiece to be pressurized.

4. The gas isostatic pressure device according to claim 1, characterized in that: An air source control valve is also provided between the air source boosting device and the pressure chamber assembly to control the on and off of the air source.

5. The gas isostatic pressure device according to claim 1, characterized in that: The compressed gas source supply device uses dry gas for compression.

6. The gas isostatic pressure device according to claim 1, characterized in that: The compressed gas source supply device uses inert gas.

7. The gas isostatic pressure device according to claim 3, characterized in that: The storage rack is fixedly connected to the compartment cover.

8. The gas isostatic pressure device according to claim 3, characterized in that: The storage rack is fixedly connected to the warehouse body.

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