Solid-state battery pressurizing device and vehicle

Abstract

Disclosed in the present application are a solid-state battery pressurizing device and a vehicle. The solid-state battery pressurizing device comprises a pressurizing mechanism; the pressurizing mechanism is connected to a solid-state battery, and used for introducing a pressurizing medium into the solid-state battery so as to adjust the pressure in the solid-state battery; the pressurizing mechanism is also connected to shock absorbers in a vehicle suspension system, and used for adjusting the pressure of the shock absorbers. The pressurizing mechanism is used for adjusting both the pressure of the solid-state battery and the pressure of the shock absorbers, simplifying vehicle design, and reducing the number of parts in vehicles and the cost of the vehicles.

Description

Solid-state battery pressurizing device and vehicle

[0001] The present application claims priority to the Chinese patent application No. 202411068027.4, filed on August 5, 2024, entitled "Solid-state battery pressurizing device and vehicle", the whole content of which is incorporated herein by reference. TECHNICAL FIELD

[0002] The present application relates to the technical field of battery, more particularly, to a solid-state battery pressurizing device and vehicle. BACKGROUND

[0003] The solid-state battery is a kind of battery using solid electrode and solid electrolyte, which has the advantage of high energy density. The solid-state battery needs to have a sustained pressure during operation to ensure the contact and conduction of active particles in the solid-state battery.

[0004] At present, a pressurizing device is usually used to pressurize the solid-state battery. The pressurizing device includes a transmission rod, and the pressurizing device moves by driving the transmission rod, and the moving rod is pressed on the battery cell of the solid-state battery to realize pressurization. In this way, the pressure receiving surface of the battery cell is subjected to pressure, and other areas of the battery cell except the pressure receiving surface are not subjected to pressure, which affects the contact and conduction of active particles in the solid-state battery. Moreover, the separate arrangement of the pressurizing device also increases the parts in the vehicle, thereby increasing the manufacturing cost. SUMMARY

[0005] The present application aims to provide a solid-state battery pressurizing device and vehicle to solve the technical problems that the solid-state battery pressurizing device in the related art causes the pressure receiving surface of the battery cell to be subjected to pressure, the other areas of the battery cell except the pressure receiving surface are not subjected to pressure, which affects the contact and conduction of active particles in the solid-state battery, and the separate arrangement of the pressurizing device increases the parts in the vehicle, thereby increasing the manufacturing cost.

[0006] In a first aspect, the embodiments of the present application provide a solid-state battery pressurizing device for adjusting the pressure in a solid-state battery, the solid-state battery pressurizing device comprising a pressurizing mechanism; the pressurizing mechanism is connected to the solid-state battery, and the pressurizing mechanism is used to introduce a pressurizing medium into the solid-state battery to adjust the pressure in the solid-state battery; the pressurizing mechanism is also connected to a shock absorber in a vehicle suspension system, and is used to adjust the pressure of the shock absorber.

[0007] In some embodiments, the solid-state battery comprises a battery cell and a battery box, and the battery cell is packaged in the battery box; the pressurizing mechanism is connected to the battery box, and the pressurizing mechanism is used to introduce the pressurizing medium into the battery box to press the battery cell by the pressurizing medium.

[0008] In some embodiments, the pressurizing mechanism comprises a hydraulic pump and a liquid storage tank; a liquid inlet of the hydraulic pump is connected to the liquid storage tank, and a liquid outlet of the hydraulic pump is connected to the solid-state battery; the hydraulic pump is used to pump the pressurizing medium in the liquid storage tank into the solid-state battery.

[0009] In some embodiments, the solid-state battery pressurizing device further comprises a first pressure relief mechanism; a pressure relief inlet of the first pressure relief mechanism is connected to the solid-state battery, and a pressure relief outlet of the first pressure relief mechanism is connected to the liquid storage tank; the first pressure relief mechanism is used to transport the pressurizing medium flowing out of the solid-state battery when the solid-state battery is depressurized to the liquid storage tank.

[0010] In some embodiments, the solid-state battery pressurizing device further comprises a first control valve and a first pipeline; the first control valve is arranged on the first pipeline, and the first control valve is used to control the opening or closing of the first pipeline; one end of the first pipeline is connected to the liquid outlet of the hydraulic pump, and the other end of the first pipeline is connected to the gas-liquid inlet and outlet of the solid-state battery; the pressure relief inlet of the first pressure relief mechanism is connected to the first pipeline between the first control valve and the gas-liquid inlet and outlet.

[0011] In some embodiments, the pressurizing mechanism comprises a gas storage tank and an air compressor; a gas inlet of the gas storage tank is connected to a gas outlet of the air compressor, and a gas outlet of the gas storage tank is connected to the solid-state battery; the air compressor is used to input the pressurizing medium into the gas storage tank; the gas storage tank is used to store the pressurizing medium and input the pressurizing medium into the solid-state battery.

[0012] In some embodiments, when the solid-state battery needs to be pressurized, the air compressor stops inputting the pressurizing medium into the gas storage tank, and the pressurizing medium stored in the gas storage tank is used to be transported into the solid-state battery.

[0013] In some embodiments, the solid-state battery pressurizing device further comprises a second pressure relief mechanism, which is used to be connected to the solid-state battery and discharge the pressurizing medium when the solid-state battery is depressurized.

[0014] In some embodiments, the solid-state battery pressurizing device further comprises a dryer, which is connected between the gas outlet of the gas storage tank and the solid-state battery.

[0015] In some embodiments, the solid-state battery pressurizing device further comprises an electronic control unit, which is electrically connected to the solid-state battery and the shock absorber; the electronic control unit is used to control the operation of the pressurizing mechanism to input the pressurizing medium into the solid-state battery and input the pressurizing medium into the shock absorber.

[0016] In some embodiments, the solid-state battery pressurization device further comprises an information collection element connected to the solid-state battery, for collecting state information of the solid-state battery; the electronic control unit is electrically connected to the information collection element, and the electronic control unit receives the state information transmitted by the information collection element and controls the operation of the pressurization mechanism according to the state information.

[0017] In some embodiments, the state information comprises at least one of voltage, current, battery state of charge, battery state of health, temperature, and pressure.

[0018] In some embodiments, the solid-state battery pressurization device further comprises a pressure detection unit; the pressure detection unit is arranged in the solid-state battery, for detecting the pressure in the solid-state battery; the electronic control unit is electrically connected to the pressure detection unit, and the electronic control unit is configured to control the pressurization mechanism to introduce pressurization medium into the solid-state battery according to the pressure detected by the pressure detection unit.

[0019] In some embodiments, the solid-state battery pressurization device further comprises a temperature sensor; the temperature sensor is arranged in the solid-state battery, for detecting the temperature in the solid-state battery; the electronic control unit is electrically connected to the temperature sensor, and the electronic control unit is configured to control the pressurization mechanism to introduce pressurization medium into the solid-state battery according to the temperature detected by the temperature sensor.

[0020] In some embodiments, the pressure detection unit is connected to the side wall of the solid-state battery; and / or, the temperature sensor is connected to the side wall of the solid-state battery.

[0021] In some embodiments, the pressurization medium comprises at least one of mineral oil, synthetic oil, aqueous oil, and biodegradable oil.

[0022] In some embodiments, the pressurization medium comprises at least one of air and inert gas.

[0023] In a second aspect, the embodiments of the present application provide a vehicle, comprising a vehicle body and a solid-state battery pressurization device as described above, and the vehicle body is provided with the solid-state battery pressurization device.

[0024] Compared with the prior art, the present application has the following advantages:

[0025] The solid-state battery pressurizing device provided by the embodiment of the present application comprises a pressurizing mechanism connected with the solid-state battery, and the pressurizing mechanism is used for introducing pressurizing medium into the solid-state battery to adjust the pressure in the solid-state battery; the pressurizing mechanism is also connected with a shock absorber in a vehicle suspension system, and is used for introducing pressurizing medium into the shock absorber to adjust the pressure of the shock absorber; the pressurizing mechanism is used for adjusting the pressure of the solid-state battery and the shock absorber at the same time, which can simplify the design of the vehicle, reduce the parts in the vehicle, and reduce the cost of the vehicle. Moreover, the pressure in the solid-state battery is adjusted by the introduced pressurizing medium, the pressurizing medium has good fluidity, the pressurizing medium can uniformly pressurize each part of the solid-state battery, increase the contact and conduction of active particles in the solid-state battery, and thus the solid-state battery can be efficiently and stably operated.

[0026] The above description is only a summary of the technical solutions of the present application. In order to enable the technical means of the present application to be more clearly understood, the present application can be implemented according to the content of the description, and in order to enable the above and other purposes, characteristics and advantages of the present application to be more obvious and easy to understand, the following specific embodiments of the present application are described. BRIEF DESCRIPTION OF DRAWINGS

[0027] Fig. 1 is a structural schematic diagram of a solid-state battery provided by the embodiment of the present application;

[0028] Fig. 2 is a connection schematic diagram one of a solid-state battery pressurizing device provided by the embodiment of the present application;

[0029] Fig. 3 is a connection schematic diagram two of a solid-state battery pressurizing device provided by the embodiment of the present application.

[0030] Fig. 1 is a structural schematic diagram of a solid-state battery provided by the embodiment of the present application; DETAILED DESCRIPTION

[0031] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present application, and cannot be understood as a limitation of the present application.

[0032] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0033] The solid-state battery 10 is a battery using a solid electrolyte. The application of pressure in the solid-state battery 10 can increase the contact and conduction of active particles within the solid-state battery 10. That is, by applying pressure in the solid-state battery 10, the contact area between the electrode and the solid electrolyte in the solid-state battery 10 can be increased, thereby improving the electrochemical performance of the solid-state battery 10; good contact can reduce the internal resistance of the solid-state battery 10, and improve the charging and discharging efficiency of the solid-state battery 10. Moreover, a higher interface resistance can be formed between the electrode and the solid electrolyte in the solid-state battery 10, and by applying pressure, this interface resistance can be reduced, making the solid-state battery 10 more efficient.

[0034] The vehicle suspension system is a general term for all force transmission connecting devices between the vehicle frame and the axle or wheel of the vehicle. The function of the vehicle suspension system is to transmit the force and torque between the wheel and the frame, and to buffer the impact force transmitted to the frame by the uneven road surface, and to attenuate the vibration caused thereby, so as to ensure smooth driving of the vehicle. The vehicle suspension system determines the stability, comfort and safety of the vehicle, and is one of the key components of the vehicle.

[0035] A shock absorber 60 is provided in the vehicle suspension system, and the main function of the shock absorber 60 is to absorb and dissipate vibration and impact energy. The working principle of the shock absorber 60 is based on the hydraulic or pneumatic principle, and the vibration energy is absorbed by the compression and expansion of the internal hydraulic oil or gas.

[0036] The embodiment of the present application provides a solid-state battery pressurizing device for adjusting the pressure in the solid-state battery 10, so that the solid-state battery 10 operates efficiently and stably.

[0037] Referring to FIGS. 1-3, the solid-state battery pressurizing device includes a pressurizing mechanism 20; the pressurizing mechanism 20 is connected with the solid-state battery 10, and the pressurizing mechanism 20 is used to introduce a pressurizing medium 50 into the solid-state battery 10 to adjust the pressure in the solid-state battery 10; the pressurizing mechanism 20 is also connected with the shock absorber 60 in the vehicle suspension system, and is used to adjust the pressure of the shock absorber 60.

[0038] The pressurizing medium 50 refers to a substance for transmitting pressure, and can simultaneously adjust the pressure in the solid-state battery 10 and the pressure of the shock absorber 60. The pressurizing medium 50 has good fluidity and is hydraulic oil or gas.

[0039] In the embodiment, the pressurizing mechanism 20 is connected to the solid-state battery 10 and is used to introduce the pressurizing medium 50 into the solid-state battery 10 to adjust the pressure in the solid-state battery 10. The pressurizing mechanism 20 is also connected to the shock absorber 60 in the vehicle suspension system and is used to introduce the pressurizing medium 50 into the shock absorber 60 to adjust the pressure of the shock absorber 60. The pressurizing mechanism 20 can simultaneously adjust the pressures of the solid-state battery 10 and the shock absorber 60, which can simplify the design of the vehicle, reduce the parts in the vehicle, and reduce the cost of the vehicle. Moreover, the pressure in the solid-state battery 10 is adjusted by the introduced pressurizing medium 50, the pressurizing medium 50 has good fluidity, and the pressurizing medium 50 can uniformly press the solid-state battery 10, increase the contact and conduction of active particles in the solid-state battery 10, and thus make the solid-state battery 10 operate efficiently and stably.

[0040] In some embodiments, the solid-state battery 10 includes the battery core 12 and the battery box 11, and the battery core 12 is encapsulated in the battery box 11. The pressurizing mechanism 20 is connected to the battery box 11 and is used to introduce the pressurizing medium 50 into the battery box 11 to press the battery core 12 by the pressurizing medium 50.

[0041] In the embodiment, after the pressurizing medium 50 is introduced into the battery box 11, the pressurizing medium 50 wraps the battery core 12 to press the battery core 12. The pressurizing medium 50 can uniformly press each part of the battery core 12 to increase the contact and conduction of active particles in the battery core, and thus make the solid-state battery 10 operate efficiently and stably.

[0042] In some embodiments, referring to FIG. 2, the pressurizing mechanism 20 includes a hydraulic pump 21 and a liquid storage tank 22. The liquid inlet of the hydraulic pump 21 is connected to the liquid storage tank 22, and the liquid outlet of the hydraulic pump 21 is connected to the solid-state battery 10. The hydraulic pump 21 is used to pump the pressurizing medium 50 in the liquid storage tank 22 into the solid-state battery 10.

[0043] The liquid storage tank 22 is a container for storing the pressurizing medium 50.

[0044] After the hydraulic pump 21 sucks the pressurizing medium 50 (which is hydraulic oil) from the liquid storage tank 22, the pressure of the pressurizing medium 50 is increased to form the pressurizing medium 50 with pressure, and the pressurizing medium 50 with pressure is pumped into the solid-state battery 10. The pressurizing medium 50 with pressure uniformly presses each part of the battery core 12.

[0045] In some embodiments, referring to FIG. 2, the solid-state battery pressurizing device further comprises a first pressure relief mechanism 23; a pressure relief inlet of the first pressure relief mechanism 23 is connected to the solid-state battery 10, and a pressure relief outlet of the first pressure relief mechanism 23 is connected to the liquid storage tank 22; the first pressure relief mechanism 23 is used to deliver the pressurizing medium 50 flowing out of the solid-state battery 10 when the solid-state battery 10 needs to be depressurized to the liquid storage tank 22.

[0046] When the solid-state battery 10 needs to be depressurized, the pressurizing medium 50 in the solid-state battery 10 enters the first pressure relief mechanism 23 through the pressure relief inlet of the first pressure relief mechanism 23, and then flows into the liquid storage tank 22 through the pressure relief outlet of the first pressure relief mechanism 23, so as to realize the depressurization requirement of the solid-state battery 10; and the return of the pressurizing medium 50 to the liquid storage tank 22 is realized, so as to avoid the waste of the pressurizing medium 50 and save the cost.

[0047] In some embodiments, the solid-state battery pressurizing device further comprises a first control valve 31 and a first pipeline 32; the first control valve 31 is arranged on the first pipeline 32, and the first control valve 31 is used to control the connection or disconnection of the first pipeline 32; one end of the first pipeline 32 is connected to the liquid outlet of the hydraulic pump 21, and the other end of the first pipeline 32 is connected to the gas-liquid inlet and outlet 15 of the solid-state battery 10; the pressure relief inlet of the first pressure relief mechanism 23 is connected to the first pipeline 32 between the first control valve 31 and the gas-liquid inlet and outlet 15.

[0048] In use, when the solid-state battery 10 needs to be pressurized, the first control valve 31 controls the connection of the first pipeline 32, the first pressure relief mechanism 23 does not work, the hydraulic pump 21 sucks the pressurizing medium 50 from the liquid storage tank 22, and forms the pressurizing medium 50 with pressure, which is output from the liquid outlet of the hydraulic pump 21 and then enters the solid-state battery 10 through the first pipeline 32 and the gas-liquid inlet and outlet 15 of the solid-state battery 10. When the solid-state battery 10 needs to be depressurized, the first control valve 31 controls the disconnection of the first pipeline 32, the first pressure relief mechanism 23 is started, and the pressurizing medium 50 in the solid-state battery 10 flows out of the gas-liquid inlet and outlet 15 of the solid-state battery 10, then enters the first pressure relief mechanism 23 through the pressure relief inlet of the first pressure relief mechanism 23 and the part of the first pipeline 32, and then flows into the liquid storage tank 22 through the pressure relief outlet of the first pressure relief mechanism 23. The first control valve 31 and the first pipeline 32 can realize the flow of the pressurizing medium 50 into the solid-state battery 10 to pressurize the solid-state battery, and realize the flow of the pressurizing medium 50 out of the solid-state battery 10 to depressurize. The pressurization and the depressurization share the first pipeline 32, and the gas-liquid inlet and outlet 15 of the solid-state battery 10 are used for the inflow and outflow of the pressurizing medium 50, which can simplify the solid-state battery pressurizing device and save the cost.

[0049] In some embodiments, the pressurized medium 50 includes at least one of mineral oil, synthetic oil, aqueous oil, biodegradable oil.

[0050] When the pressurized medium 50 includes at least one of the above, the pressurized medium 50 is compatible with the packaging material, the tab, the connection harness, etc. of the solid-state battery 10, has no corrosion to the solid-state battery 10, and avoids damage to the solid-state battery 10. It can be understood that the pressurized medium 50 can also be other hydraulic oil that has no corrosion to the solid-state battery 10 as a whole, which is not specifically limited in the present application.

[0051] In an embodiment, the synthetic oil includes at least one of polyester, polycarbonate, and polyolefin.

[0052] In some embodiments, the pressurizing mechanism 20 includes an air tank 24 and an air compressor 25; an air inlet of the air tank 24 is connected to an air outlet of the air compressor 25, and an air outlet of the air tank 24 is connected to the solid-state battery 10; the air compressor 25 is configured to input the pressurized medium 50 into the air tank 24; and the air tank 24 is configured to store the pressurized medium 50 and input the pressurized medium 50 into the solid-state battery 10.

[0053] The air tank 24 is configured to store a container of the pressurized medium 50 compressed by the air compressor 25 to have pressure, and the pressurized medium 50 is a gas.

[0054] The air compressor 25 is a device for compressing gas. In the present embodiment, the air inlet of the air tank 24 is connected to the air outlet of the air compressor 25, and the air outlet of the air tank 24 is connected to the solid-state battery 10. In use, the air compressor 25 works to provide the pressurized medium 50 with pressure to the air tank 24, and the air tank 24 is configured to store the pressurized medium 50 with pressure. When the solid-state battery 10 needs to be pressurized, the air tank 24 provides the pressurized medium 50 with pressure to the solid-state battery 10, which uniformly pressurizes each part of the battery cell 12, so that the solid-state battery 10 operates efficiently and stably.

[0055] In some embodiments, in order to reduce the influence of pressure fluctuation in the solid-state battery 10 on the solid-state battery 10, when the solid-state battery 10 needs to be pressurized, the air compressor 25 stops inputting the pressurized medium 50 into the air tank 24, and the pressurized medium 50 stored in the air tank 24 is used to be delivered into the solid-state battery 10 to form isostatic pressure pressurization.

[0056] In some embodiments, the solid-state battery pressurizing device further comprises a second pressure relief mechanism, which is connected to the solid-state battery 10 and used to discharge the pressurizing medium 50 when the solid-state battery 10 needs to be depressurized. In the above structure of the present application, when the solid-state battery 10 needs to be depressurized, the pressurizing medium 50 in the solid-state battery 10 is discharged through the second pressure relief mechanism to meet the depressurization requirement of the solid-state battery 10, which has the advantages of simplicity and convenience.

[0057] In some embodiments, the solid-state battery pressurizing device further comprises a dryer, which is connected between the gas outlet of the gas tank 24 and the solid-state battery 10.

[0058] The dryer is used to dry the pressurizing medium 50 to avoid the influence of water vapor and the like contained in the pressurizing medium 50 on the solid-state battery 10, so as to improve the safety of the solid-state battery 10 when being pressurized and the stability of the solid-state battery 10 when being operated.

[0059] In some embodiments, the solid-state battery pressurizing device further comprises an electronic control unit 40, which is electrically connected to the solid-state battery 10 and the shock absorber 60, and is used to control the operation of the pressurizing mechanism 20 to introduce the pressurizing medium 50 into the solid-state battery 10 and the shock absorber 60.

[0060] The electronic control unit (ECU) is electrically connected to the solid-state battery 10 and the shock absorber 60, and accurately controls the operation of the pressurizing mechanism 20 to introduce the pressurizing medium 50 into the solid-state battery 10 and the shock absorber 60 according to the received information of the solid-state battery 10 and the shock absorber 60, so as to simultaneously adjust the pressure of the solid-state battery 10 and the pressure of the shock absorber 60, which can simplify the design of the vehicle, reduce the parts in the vehicle, and reduce the cost of the vehicle.

[0061] The electrical connection can at least realize the transmission of electrical signals and currents, and can be wired communication connection and wireless communication connection, or physical contact circuit connection, wireless communication connection, etc.

[0062] In some embodiments, the solid-state battery pressurizing device further comprises an information collection element connected to the solid-state battery 10 and used to collect the state information of the solid-state battery 10; the electronic control unit 40 is electrically connected to the information collection element, receives the state information transmitted by the information collection element, and controls the operation of the pressurizing mechanism 20 according to the state information. In the embodiment of the present application, the information collection element is used to collect the state information of the solid-state battery 10, and the electronic control unit 40 controls the operation of the pressurizing mechanism 20 according to the state information, so as to pressurize the solid-state battery 10 according to the state of the solid-state battery 10, avoid the risk of excessive pressure and temperature of the solid-state battery 10, and be safer.

[0063] In the embodiments of the present application, the state information is specifically set according to the use requirements. For example, the state information includes at least one of voltage, current, battery charge state, battery health state, temperature, and pressure, which meets the requirements of pressurizing the solid-state battery 10 according to the state of the solid-state battery 10 and ensuring the safety and stability of the solid-state battery 10.

[0064] In some embodiments, the pressurizing medium 50 can be specifically selected according to the use requirements, which is not limited in the embodiments of the present application, and meets the pressurizing requirements of the solid-state battery 10 and the shock absorber 60, and has no corrosion to the whole solid-state battery 10. For example, the pressurizing medium 50 includes at least one of air and inert gas. The inert gas is, for example, nitrogen and the like.

[0065] In some embodiments, the solid-state battery pressurizing device further includes a pressure detection unit; the pressure detection unit is arranged in the solid-state battery 10 and is used for detecting the pressure in the solid-state battery 10; the electronic control unit 40 is electrically connected with the pressure detection unit, and the electronic control unit 40 is used for controlling the pressurizing mechanism 20 to introduce the pressurizing medium 50 into the solid-state battery 10 according to the pressure detected by the pressure detection unit, so that the pressurizing medium 50 introduced into the solid-state battery 10 meets the pressurizing requirements of the solid-state battery 10.

[0066] In some embodiments, the solid-state battery pressurizing device further includes a temperature sensor; the temperature sensor is arranged in the solid-state battery 10 and is used for detecting the temperature in the solid-state battery 10; the electronic control unit 40 is electrically connected with the temperature sensor, and the electronic control unit 40 is used for controlling the pressurizing mechanism 20 to introduce the pressurizing medium 50 into the solid-state battery 10 according to the temperature detected by the temperature sensor.

[0067] The temperature and pressure in the solid-state battery 10 are related, and the electronic control unit 40 is used for controlling the pressurizing mechanism 20 to introduce the pressurizing medium 50 into the solid-state battery 10 according to the temperature detected by the temperature sensor. The electronic control unit 40 realizes temperature safety monitoring of the solid-state battery 10 while introducing the pressurizing medium 50 into the solid-state battery 10, adjusts the pressurizing medium 50 introduced into the solid-state battery 10 in time through the pressurizing mechanism 20, and ensures the safety and stability of the solid-state battery 10.

[0068] In some embodiments, the solid-state battery 10 is provided with a communication interface 14, the communication interface 14 is electrically connected with the pressure detection unit, the temperature sensor, and the electronic control unit 40 respectively, and the communication interface 14 transmits the pressure information and the temperature information to the electronic control unit 40.

[0069] In some embodiments, the pressure detection unit is connected to the side wall of the solid-state battery 10. The structure of the connection of the pressure detection unit to the side wall of the solid-state battery 10 is set according to the use requirement, which is not specifically limited in the embodiments of the present application. For example, the pressure detection unit is embedded in the side wall of the solid-state battery 10 and is integrally arranged with the side wall of the solid-state battery 10. For another example, the pressure detection unit is arranged between the battery box 11 and the battery cell 12 of the solid-state battery 10.

[0070] In some embodiments, the temperature sensor is connected to the side wall of the solid-state battery 10. The structure of the connection of the temperature sensor to the side wall of the solid-state battery 10 is set according to the use requirement, which is not specifically limited in the embodiments of the present application. For example, the temperature sensor is embedded in the side wall of the solid-state battery 10 and is integrally arranged with the side wall of the solid-state battery 10. For another example, the temperature sensor is arranged between the battery box 11 and the battery cell 12 of the solid-state battery 10.

[0071] In a specific embodiment, referring to FIG. 1, the solid-state battery 10 includes a battery box 11, a battery cell 12, positive and negative electrode ports 13, a communication interface 14, a gas-liquid inlet and outlet 15, a pressure detection unit, and a temperature detection unit 16. The battery cell 12 and the pressure detection unit and the temperature detection unit 16 are arranged in the battery box 11, and the positive and negative electrode ports 13, the communication interface 14, and the gas-liquid inlet and outlet 15 are arranged on the battery box 11. The battery cell 12 is connected to the positive and negative electrode ports 13, and the solid-state battery 10 realizes charging and discharging through the positive and negative electrode ports 13. The pressure detection unit and the temperature detection unit 16 are electrically connected to the communication interface 14, the solid-state battery 10 is electrically connected to the electronic control unit 40 through the communication interface 14, and the transmission of state information is realized. The solid-state battery 10 is connected to the pressurizing mechanism 20 through the gas-liquid inlet and outlet 15 to realize the input of the pressurizing medium 50 into the solid-state battery 10.

[0072] The solid-state battery 10 and the shock absorber 60 share the pressurizing mechanism 20 and the electronic control unit 40.

[0073] When the pressurizing medium is hydraulic oil, the shock absorber 60 is, for example, a hydraulic shock absorber, and the pressurizing mechanism 20 includes a hydraulic pump 21, a liquid storage tank 22, and a first pressure relief mechanism 23. Referring to FIG. 2, a connection schematic diagram of the solid-state battery 10, the shock absorber 60, the hydraulic pump 21, the liquid storage tank 22, the first pressure relief mechanism 23, and the electronic control unit 40 is shown, wherein the connection of the shock absorber 60 to the pressurizing mechanism 20 and the electronic control unit 40 belongs to the conventional technology, and the embodiments of the present application do not make too much repetition.

[0074] Referring to Fig. 2, the outlet of the liquid tank 22 is connected to the inlet of the hydraulic pump 21 through a second pipeline 361, and the outlet of the hydraulic pump 21 is connected to the gas-liquid inlet and outlet 15 of the solid-state battery 10 through a first pipeline 32. A one-way valve 34 and a first control valve 31 are arranged on the first pipeline 32, the one-way valve 34 is arranged between the outlet of the hydraulic pump 21 and the first control valve 31, the first pressure relief mechanism 23 is connected to the first pipeline 32 between the first control valve 31 and the gas-liquid inlet and outlet 15, and the first pressure relief mechanism 23 is connected to the liquid tank 22 (not shown in the figure). One end of a third pipeline 362 is connected to the first pipeline 32 between the one-way valve 34 and the first control valve 31, and the other end of the third pipeline 362 is connected to the vehicle suspension system, and the vehicle suspension system is provided with corresponding pipelines and control valves such as opening adjusting valve 61 to deliver the hydraulic oil delivered by the third pipeline 362 to the shock absorber 60. A third pressure relief mechanism 35 is arranged on the third pipeline 362.

[0075] When the solid-state battery 10 needs to be pressurized, the electronic control unit 40 controls the first control valve 31 to connect the first pipeline 32, and the first pressure relief mechanism 23 is not working. The electronic control unit 40 controls the hydraulic pump 21 to suck the pressurizing medium 50 from the liquid tank 22 to form the pressurizing medium 50 with pressure, which is output from the outlet of the hydraulic pump 21 and flows in the first pipeline 32, and then passes through the one-way valve 34, the first control valve 31, and the gas-liquid inlet and outlet 15 of the solid-state battery 10 to enter the solid-state battery 10. When the solid-state battery 10 needs to be depressurized, the electronic control unit 40 controls the first control valve 31 to be disconnected, and the first pressure relief mechanism 23 is started. The pressurizing medium 50 in the solid-state battery 10 flows out from the gas-liquid inlet and outlet 15 of the solid-state battery 10, and then enters the first pressure relief mechanism 23 through part of the first pipeline 32 and the pressure relief inlet of the first pressure relief mechanism 23, and then flows out from the pressure relief outlet of the first pressure relief mechanism 23 and flows into the liquid tank 22.

[0076] When the solid-state battery 10 needs to be pressurized and the vehicle suspension system needs hydraulic oil (the hydraulic suspension system needs to adjust the stiffness and damping of each shock absorber 60, etc.), the electronic control unit 40 controls the first control valve 31 to open, and the electronic control unit 40 controls the hydraulic pump 21 to suck the pressurizing medium 50 from the liquid storage tank 22 to form the pressurized medium 50 with pressure, which is output from the outlet of the hydraulic pump 21 and flows in the first pipeline 32, is branched after passing through the one-way valve 34, and part of the pressurized medium 50 continues to flow in the first pipeline 32 and enters the solid-state battery 10 through the first control valve 31 and the gas-liquid inlet and outlet 15 of the solid-state battery 10; the remaining part of the pressurized medium 50 flows into the vehicle suspension system through the third pipeline 362. When the hydraulic oil of the vehicle suspension system needs to flow back to the liquid storage tank 22, the hydraulic oil can flow back to the liquid storage tank 22 through the third pressure relief mechanism 35 (the connecting pipeline between the third pressure relief mechanism 35 and the liquid storage tank 22 is not shown in FIG. 2). Due to the arrangement of the one-way valve 34, the normal operation of the hydraulic pump 21 can be avoided from being affected by the hydraulic oil.

[0077] When the solid-state battery 10 does not need to be pressurized and the vehicle suspension system needs hydraulic oil, the electronic control unit 40 controls the first control valve 31 to be closed, and the electronic control unit 40 controls the hydraulic pump 21 to suck the pressurizing medium 50 from the liquid storage tank 22 to form the pressurized medium 50 with pressure, which is output from the outlet of the hydraulic pump 21 and flows in the first pipeline 32, and then flows into the vehicle suspension system through the third pipeline 362 after passing through the one-way valve 34.

[0078] In another specific embodiment, the structure of the solid-state battery 10 refers to the above-mentioned embodiments, the solid-state battery 10 and the shock absorber 60 share the pressurizing mechanism 20 and the electronic control unit 40, the pressurizing medium is gas, and the shock absorber 60 is, for example, a gas shock absorber. The pressurizing mechanism 20 includes the gas storage tank 24 and the air compressor 25. Referring to FIG. 3, a connection schematic diagram of the solid-state battery 10, the shock absorber 60, the gas storage tank 24, the air compressor 25, and the electronic control unit 40 is shown, wherein the connection of the shock absorber 60 with the pressurizing mechanism 20 and the electronic control unit 40 belongs to the conventional technology, and the embodiments of the present application do not make too much repetition.

[0079] Referring to FIG. 3, the gas outlet of the air compressor 25 is connected with the gas inlet of the gas storage tank 24 through the fourth pipeline 363, the gas outlet of the gas storage tank 24 is connected with the gas-liquid inlet and outlet 15 of the solid-state battery 10 through the fifth pipeline 364, the second control valve 33 is arranged on the fifth pipeline 364, one end of the sixth pipeline 365 is connected with the fifth pipeline 364 between the second control valve 33 and the gas outlet of the gas storage tank 24, and the other end of the sixth pipeline 365 is connected with the vehicle suspension system, and the vehicle suspension system is provided with corresponding pipelines and control valves to deliver the gas delivered by the sixth pipeline 365 into the shock absorber 60.

[0080] When the solid-state battery pressurizing device is in use, the air compressor 25 works to provide the pressurized medium 50 with pressure to the gas tank 24 for storing the pressurized medium 50 with pressure. When the solid-state battery 10 needs to be pressurized, the electronic control unit 40 controls the second control valve 33 to be connected, and the pressurized medium 50 with pressure in the gas tank 24 flows into the solid-state battery 10 through the fifth pipeline 364 and the gas-liquid inlet and outlet 15 of the solid-state battery 10. When the solid-state battery 10 needs to be depressurized, the electronic control unit 40 controls the second control valve 33 to be disconnected, and the second depressurizing mechanism is started to flow out the pressurized medium 50 in the solid-state battery 10 to achieve depressurization.

[0081] When the solid-state battery 10 needs to be pressurized, and the vehicle suspension system needs gas (the hydraulic suspension system needs to adjust the stiffness and damping of each shock absorber 60, etc.), the electronic control unit 40 controls the second control valve 33 to be connected, and the pressurized medium 50 with pressure in the gas tank 24 is branched through the fifth pipeline 364, part of the pressurized medium 50 continues to flow in the fifth pipeline 364 and enters the solid-state battery 10 through the second control valve 33 and the gas-liquid inlet and outlet 15 of the solid-state battery 10; the remaining part of the pressurized medium 50 flows into the vehicle suspension system through the sixth pipeline 365. When the shock absorber 60 needs to be depressurized, the gas can be directly discharged, and the specific depressurization structure of the shock absorber 60 can refer to the conventional technology, and the embodiments of the present application will not be described herein.

[0082] When the solid-state battery 10 does not need to be pressurized, and the vehicle suspension system needs gas, the electronic control unit 40 controls the second control valve 33 to be disconnected, and the pressurized medium 50 with pressure in the gas tank 24 flows into the vehicle suspension system through the fifth pipeline 364 and the sixth pipeline 365.

[0083] The solid-state battery pressurizing device of the embodiments of the present application is used to adjust the pressure of the solid-state battery 10 and the shock absorber 60 at the same time, which can simplify the vehicle design, reduce the parts in the vehicle, and reduce the cost of the vehicle. When the pressure in the solid-state battery 10 is adjusted by the pressurized medium 50 flowing in, the pressurized medium 50 (the pressurized medium 50 is hydraulic oil or gas) has good fluidity, the pressurized medium 50 can uniformly press the solid-state battery 10, the pressure is uniformly applied to each cell 12, the pressure between different cells 12 is consistent, and the pressure of different regions of the same cell 12 is uniform, which effectively increases the contact and conduction of active particles in the cell 12; and through the precise control of the electronic control unit 40, the pressure applied to the solid-state battery 10 can be adjusted according to the state of the solid-state battery 10, and the pressure in the solid-state battery 10 can be precisely controlled.

[0084] The solid-state battery pressurizing device can uniformly pressurize the battery cell 12 of the solid-state battery 10 and intelligently adjust the pressure of the battery cell 12 in real time, and can improve the energy density of the solid-state battery 10 without adding components to the solid-state battery 10.

[0085] The application further provides a vehicle comprising a vehicle body and the solid-state battery pressurizing device as described above, and the vehicle body is provided with the solid-state battery pressurizing device.

[0086] The vehicle body is provided with the solid-state battery 10 and a vehicle suspension system, and the solid-state battery pressurizing device is connected to the solid-state battery 10 and the vehicle suspension system, and is used to adjust the pressure in the solid-state battery 10 and the pressure of the shock absorber 60 of the vehicle suspension system.

[0087] The solid-state battery pressurizing device can simultaneously adjust the pressure of the solid-state battery 10 and the shock absorber 60, which can simplify the design of the vehicle, reduce the components in the vehicle, and reduce the cost of the vehicle. The solid-state battery pressurizing device can uniformly pressurize each part of the battery cell 12 of the solid-state battery 10 through the pressurizing medium 50, so as to increase the contact and conduction of the active particles in the battery cell 12, and the solid-state battery 10 can operate efficiently and stably, thereby increasing the user's satisfaction with the vehicle.

[0088] In the description of the present application, the description of the terms "embodiment", "example", etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0089] Although the embodiments of the present application have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and purposes of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. A solid state battery pressurization device for regulating pressure within a solid state battery (10), characterized by, The solid-state battery pressurizing device comprises a pressurizing mechanism (20); The pressurizing mechanism (20) is connected with the solid-state battery (10), and is used for introducing a pressurizing medium (50) into the solid-state battery (10) to adjust the pressure in the solid-state battery (10); the pressurizing mechanism (20) is also connected with a shock absorber (60) in a vehicle suspension system, and is used for adjusting the pressure of the shock absorber (60).

2. The solid-state battery pressurization apparatus of claim 1, wherein The solid-state battery (10) comprises a battery case (11) and an electric core (12) which is encapsulated in the battery case (11); The pressurizing mechanism (20) is connected with the battery case (11), and is used for introducing the pressurizing medium (50) into the battery case (11) to press the electric core (12) by the pressurizing medium (50).

3. The solid-state battery pressurization apparatus of claim 1, wherein The pressurizing mechanism (20) comprises a hydraulic pump (21) and a liquid storage tank (22); The liquid inlet of the hydraulic pump (21) is connected with the liquid storage tank (22), and the liquid outlet of the hydraulic pump (21) is connected with the solid-state battery (10); the hydraulic pump (21) is used for pumping the pressurizing medium (50) in the liquid storage tank (22) into the solid-state battery (10).

4. The solid-state battery pressurization apparatus of claim 3, wherein The solid-state battery pressurizing device further comprises a first pressure relief mechanism (23); the pressure relief inlet of the first pressure relief mechanism (23) is connected with the solid-state battery (10), and the pressure relief outlet of the first pressure relief mechanism (23) is connected with the liquid storage tank (22); the first pressure relief mechanism (23) is used for conveying the pressurizing medium (50) flowing out of the solid-state battery (10) when the solid-state battery (10) is pressure relieved to the liquid storage tank (22).

5. The solid-state battery pressurization apparatus of claim 4, wherein, The solid-state battery pressurizing device further comprises a first control valve (31) and a first pipeline (32); The first control valve (31) is arranged on the first pipeline (32), and is used for controlling the connection or disconnection of the first pipeline (32); One end of the first pipeline (32) is connected with the liquid outlet of the hydraulic pump (21), and the other end of the first pipeline (32) is connected with the gas-liquid inlet and outlet (15) of the solid-state battery (10); The pressure relief inlet of the first pressure relief mechanism (23) is connected with the first pipeline (32) between the first control valve (31) and the gas-liquid inlet and outlet (15).

6. The solid-state battery pressurization apparatus of claim 1, wherein The pressurizing mechanism (20) comprises a gas storage tank (24) and an air compressor (25); The gas inlet of the gas storage tank (24) is connected with the gas outlet of the air compressor (25), and the gas outlet of the gas storage tank (24) is connected with the solid-state battery (10); The air compressor (25) is used for inputting the pressurizing medium (50) into the gas storage tank (24); The gas storage tank (24) is used for storing the pressurizing medium (50) and inputting the pressurizing medium (50) into the solid-state battery (10).

7. The solid-state battery pressurization apparatus of claim 6, wherein, In the case that the solid-state battery (10) needs to be pressurized, the air compressor (25) stops inputting the pressurizing medium (50) into the gas storage tank (24), and the pressurizing medium (50) stored in the gas storage tank (24) is used for delivery into the solid-state battery (10).

8. The solid-state battery pressurization apparatus of claim 6, wherein, The solid-state battery pressurizing device further comprises a second pressure relief mechanism connected with the solid-state battery (10) for discharging the pressurizing medium (50) when the solid-state battery (10) is depressurized.

9. The solid-state battery pressurization apparatus of claim 6, wherein, The solid-state battery pressurizing device further comprises a dryer connected between the gas outlet of the gas storage tank (24) and the solid-state battery (10).

10. The solid-state battery pressurization apparatus of any one of claims 1-9, wherein, The solid-state battery pressurizing device further comprises an electronic control unit (40) electrically connected with the solid-state battery (10) and the shock absorber (60), and the electronic control unit (40) is used for controlling the pressurizing mechanism (20) to operate to input the pressurizing medium (50) into the solid-state battery (10) and input the pressurizing medium (50) into the shock absorber (60).

11. The solid-state battery pressurization apparatus of claim 10, wherein, The solid-state battery pressurizing device further comprises an information collecting element connected with the solid-state battery (10) for collecting state information of the solid-state battery (10). The electronic control unit (40) is electrically connected with the information collecting element, and the electronic control unit (40) receives the state information transmitted by the information collecting element and controls the pressurizing mechanism (20) to operate according to the state information.

12. The solid-state battery pressurization apparatus of claim 11, wherein, The state information includes at least one of voltage, current, battery charge state, battery health state, temperature, and pressure.

13. The solid-state battery pressurization apparatus of claim 10, wherein, The solid-state battery pressurizing device further comprises a pressure detection unit. The pressure detection unit is arranged in the solid-state battery (10) for detecting the pressure in the solid-state battery (10). The electronic control unit (40) is electrically connected with the pressure detection unit, and the electronic control unit (40) is used for controlling the pressurizing mechanism (20) to input the pressurizing medium (50) into the solid-state battery (10) according to the pressure detected by the pressure detection unit.

14. The solid-state battery pressurization apparatus according to claim 10 or 13, characterized by, The solid-state battery pressurizing device further comprises a temperature sensor. The temperature sensor is arranged in the solid-state battery (10) for detecting the temperature in the solid-state battery (10). The electronic control unit (40) is electrically connected with the temperature sensor, and the electronic control unit (40) is used for controlling the pressurizing mechanism (20) to input the pressurizing medium (50) into the solid-state battery (10) according to the temperature detected by the temperature sensor.

15. The solid-state battery pressurization apparatus of claim 14, wherein, The pressure detection unit is connected with the side wall of the solid-state battery (10); and / or, The temperature sensor is connected with the side wall of the solid-state battery (10).

16. The solid-state battery pressurization device of claim 1 or 3, wherein, The pressurizing medium (50) includes at least one of mineral oil, synthetic oil, water-containing oil, and biodegradable oil.

17. The solid-state battery pressurization device of claim 1 or 6, wherein, The pressurizing medium (50) includes at least one of air and inert gas.

18. A vehicle characterized by comprising: The vehicle includes a vehicle body and the solid-state battery pressurizing device according to any one of claims 1 to 17, and the vehicle body is provided with the solid-state battery pressurizing device.

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