Solid-state battery, pressurization method, hydraulic pressurization device, and terminal

Abstract

Embodiments of the present application provide a solid-state battery, a pressurizing method, a hydraulic pressurizing device and a terminal. The solid-state battery comprises a box body having a containing cavity; a solid-state battery module arranged in the containing cavity and forming an installation space with the cavity wall of the containing cavity; and a hydraulic pressurizing device, at least part of which is arranged in the installation space and connected with the box body, an output end of the hydraulic pressurizing device being connected with the solid-state battery module, the hydraulic pressurizing device being used to generate hydraulic power by compressing a hydraulic medium and apply pressure to the solid-state battery module under the action of the hydraulic power. The solid-state battery provided by the embodiments of the present application can apply sufficient pressure to the solid-state battery module through the hydraulic pressurizing device, meet the high-pressure pressurizing requirement of the solid-state battery, thereby improving the electrical conductivity and cycle performance of the solid-state battery, and enabling the solid-state battery to be mass-produced and applied.

Description

Technical Field

[0001] This application belongs to the field of battery technology, specifically relating to a solid-state battery, a pressurization method, a hydraulic pressurization device, and a terminal. Background Technology

[0002] Solid-state batteries possess advantages such as high energy density, strong safety, and long cycle life, making them a core development direction for next-generation power batteries. The surface of solid-state batteries typically requires high pressure to improve their conductivity and cycle performance.

[0003] However, existing pressurization methods are insufficient to meet the high-voltage requirements of solid-state batteries, reducing their conductivity and cycle performance, which in turn affects their mass production and application. Summary of the Invention

[0004] This application aims to provide a solid-state battery, a pressurization method, a hydraulic pressurization device, and a terminal to solve the problem that existing pressurization methods cannot meet the high-pressure requirements of solid-state batteries, thereby reducing the conductivity and cycle performance of solid-state batteries and affecting their mass production and application.

[0005] To solve the above-mentioned technical problems, this application is implemented as follows: In a first aspect, this application discloses a solid-state battery, the solid-state battery comprising: The housing has a receiving cavity; A solid-state battery module is disposed within the receiving cavity, and the solid-state battery module and the cavity wall of the receiving cavity form an installation space; The device includes a hydraulic pressurizing device, at least a portion of which is located within the installation space and connected to the housing. The output end of the hydraulic pressurizing device is connected to the solid-state battery module. The hydraulic pressurizing device is used to generate hydraulic power by compressing a hydraulic medium and to apply pressure to the solid-state battery module under the action of the hydraulic power.

[0006] Optionally, the hydraulic pressurization device includes a hydraulic generation component and a hydraulic actuator; The hydraulic generating component is located outside the installation space, and the hydraulic generating component is used to compress the hydraulic medium to generate hydraulic power by compressing the hydraulic medium. The hydraulic actuator is connected to the hydraulic generating component, the hydraulic actuator is disposed in the installation space, the hydraulic actuator is connected to the housing, and the output end of the hydraulic actuator is connected to the solid-state battery module. The hydraulic actuator is used to receive hydraulic power and apply pressure to the solid-state battery module under the action of hydraulic power.

[0007] Optionally, the housing includes a frame, and the receiving cavity is disposed within the frame; The solid-state battery module includes a cell array and an end plate disposed at the end of the cell array; The mounting space is formed between the end plate and the frame; The hydraulic actuator is fixedly connected to the side of the frame near the receiving cavity, and the output end of the hydraulic actuator is connected to the end plate.

[0008] Optionally, the solid-state battery module is provided in multiple groups, and the multiple groups of solid-state battery modules are arranged side by side in the receiving cavity; The hydraulic actuators are multiple in number, and each hydraulic actuator is connected to the hydraulic generation component. The multiple hydraulic actuators are divided into multiple groups, and each group of hydraulic actuators is set in a group of solid-state battery modules.

[0009] Optionally, each group of hydraulic actuators includes at least two hydraulic actuators spaced apart.

[0010] Optionally, the hydraulic pressurization device further includes at least one distribution valve, which is located within the installation space and connected to the housing. The distribution valve is in communication with the hydraulic generating component and with a plurality of the hydraulic actuators. The distribution valve is used to receive hydraulic medium from the hydraulic generating component and distribute the hydraulic medium to the plurality of the hydraulic actuators.

[0011] Optionally, the hydraulic pressurization device further includes a controller, which is electrically connected to the distribution valve. The controller is used to control the distribution valve to distribute hydraulic medium adapted to the target pressure requirement to the corresponding hydraulic actuator according to the target pressure requirement of the solid-state battery module corresponding to the hydraulic actuator.

[0012] Optionally, the hydraulic pressurization device further includes a first pipeline and a second pipeline; The first pipeline is located outside the installation space, and one end of the first pipeline is connected to the hydraulic generating component, while the other end passes through the housing and is connected to the distribution valve. The second pipeline is located within the installation space and is connected to multiple hydraulic actuators and the distribution valve.

[0013] Optionally, the hydraulic generating component includes a drive unit and a hydraulic master cylinder. The drive unit is connected to the hydraulic master cylinder, and the hydraulic master cylinder is connected to the hydraulic actuator. The drive unit is used to drive the hydraulic master cylinder to generate hydraulic power by compressing the hydraulic medium.

[0014] Optionally, the hydraulic generating assembly further includes a control valve connected to the hydraulic master cylinder, the control valve being used to control the direction and flow rate of the hydraulic medium.

[0015] Optionally, the hydraulic actuator includes a hydraulic actuator cylinder and a connecting valve. The connecting valve is connected to and communicates with the hydraulic actuator cylinder. The connecting valve is also connected to the hydraulic master cylinder. The hydraulic actuator cylinder is connected to the housing, and its output end is connected to the solid-state battery module.

[0016] Optionally, the diameter of the hydraulic actuator is 50mm-100mm; And / or, the pressurized displacement of the hydraulic actuator is 1mm-100mm.

[0017] Optionally, the solid-state battery further includes a controller electrically connected to the hydraulic pressurization device. The controller is used to control the hydraulic pressurization device to generate hydraulic power adapted to the target pressure requirement of the solid-state battery module.

[0018] Optionally, the hydraulic pressurization device further includes a detection unit connected to the solid-state battery module and electrically connected to the controller. The detection unit is used to detect the pressure on the solid-state battery module and feed back a pressure signal to the controller.

[0019] Optionally, the solid-state battery module includes a cell array and an end plate, the end plate being connected to the end of the cell array and connected to the hydraulic pressurization device; The detection unit is connected to the end plate on the side near the cell array.

[0020] Secondly, this application also discloses a pressurization method, which is applied to the solid-state battery described in any of the above claims, the pressurization method comprising: The hydraulic pressurization device generates hydraulic power by compressing the hydraulic medium, and applies pressure to at least one solid-state battery module under the action of the hydraulic power.

[0021] Optionally, when the hydraulic pressurization device includes a hydraulic generation component and a hydraulic actuator, the control of the hydraulic pressurization device generates hydraulic power by compressing the hydraulic medium and applies pressure to the solid-state battery module under the action of the hydraulic power. The hydraulic generating component is controlled to generate hydraulic power by compressing the hydraulic medium; The hydraulic actuator receives hydraulic power and applies pressure to the solid-state battery module under the action of the hydraulic power.

[0022] Optionally, the control hydraulic generation component generates hydraulic power by compressing a hydraulic medium, including: Obtain the target pressure requirement of the solid-state battery module; Based on the target pressure requirement, the hydraulic generating component is controlled to produce hydraulic power that matches the target pressure requirement.

[0023] Optionally, if the hydraulic pressurization device further includes a detection unit, the control hydraulic generation component for generating hydraulic power by compressing the hydraulic medium further includes: Obtain the pressure detected by the detection unit; The hydraulic power generated by the hydraulic generating component is controlled based on the detected pressure.

[0024] Thirdly, this application also provides a hydraulic pressurizing device, at least a portion of which is disposed within the installation space of the solid-state battery and connected to the housing of the solid-state battery. The output end of the hydraulic pressurizing device is connected to the solid-state battery module of the solid-state battery. The hydraulic pressurizing device is used to generate hydraulic power by compressing a hydraulic medium and to apply pressure to the solid-state battery module under the action of the hydraulic power.

[0025] Fourthly, this application also provides a terminal, the terminal comprising: a solid-state battery as described in any of the preceding claims.

[0026] In this embodiment, the solid-state battery includes a housing, a solid-state battery module disposed within the housing cavity, and a hydraulic pressurizing device. The solid-state battery module and the cavity wall enclose an installation space. The hydraulic pressurizing device is at least partially disposed within the installation space and is connected to the housing. The output end of the hydraulic pressurizing device is connected to the solid-state battery module. The hydraulic pressurizing device can generate hydraulic power by compressing the hydraulic medium and apply pressure to the solid-state battery module under the action of the hydraulic power. In this way, sufficient pressure can be applied to the solid-state battery module through the hydraulic pressurizing device to meet the high-pressure pressurization requirements of the solid-state battery, thereby improving the conductivity and cycle performance of the solid-state battery and enabling the solid-state battery to be mass-produced and applied.

[0027] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0028] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a schematic diagram of the structure of a solid-state battery provided in an embodiment of this application; Figure 2 This is a partially enlarged schematic diagram of a solid-state battery provided in an embodiment of this application; Figure 3 This is a partial enlarged structural diagram of a solid-state battery provided in an embodiment of this application from another angle; Figure 4 This is a block diagram illustrating a pressurization method provided in an embodiment of this application.

[0029] Reference numerals: 1-Box; 11-Receiving cavity; 12-Frame; 13-Baffle; 131-Avoidance notch; 2-Solid-state battery module; 21-Cell array; 22-End plate; 3-Installation space; 4-Hydraulic pressurizing device; 41-Hydraulic generating component; 411-Drive component; 412-Hydraulic master cylinder; 413-Reservoir tank; 414-Control valve; 42-Hydraulic actuator; 421-Hydraulic actuator cylinder; 4211-Output end; 4212-Actuator cylinder body; 4213-Fixed base; 422-Connecting valve; 43-Distribution valve; 44-First pipeline; 45-Second pipeline; 5-Controller; 6-Communication harness; 7-Electrical components. Detailed Implementation

[0030] The embodiments of this application will now be described in detail. Examples of these embodiments are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0031] The terms "first" and "second" in the specification and claims of this application may explicitly or implicitly include one or more groups of that feature. In the description of this application, unless otherwise stated, "multiple groups" means two or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0032] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0033] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0034] Solid-state batteries possess advantages such as high energy density, strong safety, and long cycle life, making them a core development direction for next-generation power batteries. The surface of solid-state batteries typically requires high pressure to improve their conductivity and cycle performance. Generally, solid-state batteries require pressure in the MPa range on their surface to achieve high conductivity and cycle performance.

[0035] Taking traditional liquid batteries as an example, the typical pressure required for cell assembly is only about 0.1 MPa, and in most operating conditions, no additional pressurization is needed. In contrast, the typical pressure required for solid-state battery cell assembly can reach 20 MPa, a pressure difference of approximately 200 times. Existing conventional battery pressurization and packaging methods are only suitable for low-pressure assembly conditions and cannot meet the high-pressure requirements of solid-state batteries. This reduces the conductivity and cycle performance of solid-state batteries, thus affecting their mass production and application.

[0036] Based on the above analysis, embodiments of this application provide a solid-state battery to at least solve the aforementioned problems. The solid-state battery of this application will now be described in detail with reference to the accompanying drawings.

[0037] Example 1 Reference Figures 1-3 This illustrates a solid-state battery provided in an embodiment of this application. For example... Figures 1 to 3As shown, the solid-state battery provided in this application embodiment may specifically include: a housing 1, the housing 1 having a receiving cavity 11; a solid-state battery module 2, the solid-state battery module 2 being disposed within the receiving cavity 11 and forming an installation space 3 between the solid-state battery module 2 and the cavity wall of the receiving cavity 11; and a hydraulic pressurizing device 4, at least a portion of the hydraulic pressurizing device 4 being disposed within the installation space 3 and connected to the housing 1, the output end 4211 of the hydraulic pressurizing device 4 being connected to the solid-state battery module 2, the hydraulic pressurizing device 4 being used to generate hydraulic power by compressing hydraulic medium and to apply pressure to the solid-state battery module 2 under the action of hydraulic power.

[0038] Specifically, the housing 1 is used to provide a foundation for housing and supporting components such as the solid-state battery module 2, the hydraulic pressurization device 4, and the electrical components 7.

[0039] like Figure 1 As shown, the solid-state battery module 2 includes multiple solid-state cells, which are stacked and arranged in a preset direction to form the solid-state battery module 2. The solid-state battery module 2 is disposed in the receiving cavity 11 of the housing 1 and is spaced apart from the cavity wall of the receiving cavity 11, thereby forming an installation space 3 between the solid-state battery module 2 and the housing 1. The installation space 3 is used to accommodate the hydraulic pressurization device 4.

[0040] like Figure 2 As shown, the hydraulic pressurizing device 4 can be partially or entirely located within the installation space 3. The hydraulic pressurizing device 4 is fixedly connected to the housing 1, and its output end 4211 is connected to the solid-state battery module 2. During the initial assembly and packaging stage of the solid-state battery module 2, the hydraulic pressurizing device 4 can generate sufficient hydraulic power by compressing the hydraulic medium. This hydraulic power drives the output end 4211 to apply sufficient pressure to the solid-state battery module 2, ensuring that the module meets the initial assembly pressure requirements and completes the packaging. During subsequent charge-discharge cycles and throughout the entire lifespan of the solid-state battery, the solid-state battery module 2 will experience pressure fluctuations due to changes in cell volume. The hydraulic pressurizing device 4 can also adjust the output hydraulic power in real time to meet the high-pressure requirements of the solid-state battery module 2, thereby improving its conductivity and cycle performance.

[0041] In practical applications, the working pressure of the hydraulic pressurizing device 4 can range from 2MPa to 50MPa, and the actual pressurization pressure applied to the solid-state battery module is 1MPa to 20MPa. The hydraulic medium can be hydraulic oil.

[0042] In this embodiment, the solid-state battery includes a housing 1, a solid-state battery module 2 disposed within a cavity 11 of the housing 1, and a hydraulic pressurizing device 4. The solid-state battery module 2 and the cavity wall of the cavity 11 enclose an installation space 3. The hydraulic pressurizing device 4 is at least partially disposed within the installation space 3 and is connected to the housing 1. The output end 4211 of the hydraulic pressurizing device 4 is connected to the solid-state battery module 2. The hydraulic pressurizing device 4 can generate hydraulic power by compressing the hydraulic medium and apply pressure to the solid-state battery module 2 under the action of the hydraulic power. In this way, the hydraulic pressurizing device 4 can apply sufficient pressure to the solid-state battery module 2 to meet the high-pressure pressurization requirements of the solid-state battery, thereby improving the conductivity and cycle performance of the solid-state battery and enabling the solid-state battery to be mass-produced and applied.

[0043] Example 2 Optionally, the hydraulic pressurization device 4 includes a hydraulic generating component 41 and a hydraulic actuator 42; the hydraulic generating component 41 is disposed outside the installation space 3 and is used to generate hydraulic power by compressing the hydraulic medium; the hydraulic actuator 42 is connected to the hydraulic generating component 41 and is disposed inside the installation space 3. The hydraulic actuator 42 is connected to the housing 1, and the output end 4211 of the hydraulic actuator 42 is connected to the solid-state battery module 2. The hydraulic actuator 42 is used to receive hydraulic power and apply pressure to the solid-state battery module 2 under the action of hydraulic power.

[0044] Specifically, such as Figure 1 and Figure 2 As shown, the hydraulic generation component 41 is disposed outside the mounting space 3. When the solid-state battery is installed in the vehicle, the hydraulic generation component 41 can be fixed to the vehicle, for example, to the vehicle chassis or body.

[0045] The hydraulic actuator 42 is installed within the installation space 3. The hydraulic actuator 42 can be fixedly connected to the housing 1 via bolts, welding, or snap-fit. The output end 4211 of the hydraulic actuator 42 abuts against or is fixedly connected to the solid-state battery module 2. The hydraulic generating component 41 and the hydraulic actuator component can be connected via pipelines. The hydraulic generating component 41 generates hydraulic power by compressing hydraulic medium, and then delivers the pressurized hydraulic medium to the hydraulic actuator 42. Under the action of the high-pressure hydraulic medium, the output end 4211 of the hydraulic actuator 42 moves to apply pressure to the solid-state battery module 2.

[0046] In practical applications, by setting up a hydraulic generating component 41 and a hydraulic actuator 42, the hydraulic generating component 41 can output stable and sufficient hydraulic power, which is directly applied to the solid-state battery module 2 via the hydraulic actuator 42. This allows for the application of sufficient clamping force to the solid-state battery module 2, thereby more accurately meeting the high-pressure pressurization requirements of the solid-state battery. Simultaneously, by placing the hydraulic generating component 41 outside the installation space 3 and the hydraulic actuator 42 inside the installation space 3, the internal space occupied by the hydraulic pressurization device 4 within the housing 1 can be reduced.

[0047] Example 3 Optionally, the housing 1 includes a frame 12, and a receiving cavity 11 is disposed within the frame 12; the solid-state battery module 2 includes a cell array 21 and an end plate 22 disposed at the end of the cell array 21; the mounting space 3 is formed between the end plate 22 and the frame 12; the hydraulic actuator 42 is fixedly connected to the side of the frame 12 near the receiving cavity 11, and the output end 4211 of the hydraulic actuator 42 is connected to the end plate 22.

[0048] Specifically, such as Figure 2 As shown, the frame 12 is a frame structure formed by splicing multiple side plates, and the receiving cavity 11 is formed by multiple side plates.

[0049] like Figure 2 As shown, the cell array 21 includes multiple solid-state cells stacked along the length of the frame 12. An end plate 22 is located at the end of the cell array 21 along the stacking direction. A gap is left between the end plate 22 and the inner sidewall of the frame 12 along the stacking direction, which is the mounting space 3.

[0050] like Figure 2 As shown, the hydraulic actuator 42 is fixedly installed on the inner sidewall of the frame 12 and located in the installation space 3 between the end plate 22 and the frame 12. The output end 4211 of the hydraulic actuator 42 faces the end plate 22 along the stacking direction and is fixedly connected to or abuts against the end plate 22. Thus, when the hydraulic actuator 42 receives hydraulic power, the output end 4211 is displaced along the stacking direction toward the cell array 21, which can push the end plate 22 to press the cell array 21, thereby achieving stable pressurization of the solid-state battery module 2. Moreover, the pressure transmission path is shorter and the pressure loss is smaller, further improving the pressurization effect.

[0051] Example 4 Optionally, the solid-state battery module 2 is provided in multiple groups, and the multiple groups of solid-state battery modules 2 are disposed in the receiving cavity 11; the number of hydraulic actuators 42 is multiple, and the multiple hydraulic actuators 42 are all connected to the hydraulic generating component 41. The multiple hydraulic actuators 42 are divided into multiple groups, and each group of hydraulic actuators 42 is disposed in a group of solid-state battery modules 2.

[0052] Specifically, multiple solid-state battery modules 2 are disposed within the receiving cavity 11. In some optional embodiments, the multiple solid-state battery modules may be disposed side by side within the receiving cavity 11, such as... Figure 1 and Figure 3 As shown, the housing 1 has multiple partitions 13 inside the cavity 11, which divide the cavity 11 into multiple sub-cavities arranged side by side. Multiple solid-state battery modules 2 are respectively arranged in the multiple sub-cavities. Each solid-state battery module 2 has an installation space 3 between itself and the cavity wall of the corresponding sub-cavity. Each installation space 3 is provided with a set of hydraulic actuators 42.

[0053] Multiple hydraulic actuators 42 are divided into multiple groups, and each group of hydraulic actuators 42 corresponds to a group of solid-state battery modules 2. For example, each group of hydraulic actuators 42 can apply pressure to the corresponding solid-state battery module 2 individually.

[0054] In this embodiment, each set of hydraulic actuators 42 is disposed with a set of solid-state battery modules 2. Each set of hydraulic actuators 42 can apply pressure to its corresponding solid-state battery module 2 independently, thus ensuring that each solid-state battery module 2 receives sufficient applied pressure. Simultaneously, multiple hydraulic actuators 42 are connected to the same hydraulic generating component 41 through corresponding pipelines, allowing a single hydraulic generating component 41 to simultaneously provide hydraulic power to multiple hydraulic actuators 42. This simplifies the overall structure and reduces space occupation and manufacturing costs.

[0055] Example 5 Optionally, each set of hydraulic actuators 42 includes at least two spaced-apart hydraulic actuators 42.

[0056] Specifically, such as Figure 2 As shown, each group of hydraulic actuators 42 includes at least two hydraulic actuators 42, which are respectively disposed at different positions in the width direction of the solid-state battery module 2. For example, the number of hydraulic actuators 42 included in each group of hydraulic actuators 42 can be 2, 3, 4, etc., which can be reasonably selected according to the size and pressure requirements of the solid-state battery module 2.

[0057] In practical applications, by making each group include at least two spaced hydraulic actuators 42, the pressure distribution applied by the output end 4211 of the hydraulic actuator 42 to the solid-state battery module 2 can be more uniform, avoiding the impact of uneven local force on the pressurization effect and improving the overall performance stability of the solid-state battery.

[0058] Example 6 Optionally, the hydraulic pressurizing device 4 further includes at least one distribution valve 43, which is located in the installation space 3 and connected to the housing 1. The distribution valve 43 is connected to the hydraulic generating component 41 and to a plurality of hydraulic actuators 42. The distribution valve 43 is used to receive hydraulic medium from the hydraulic generating component 41 and distribute the hydraulic medium to the plurality of hydraulic actuators 42.

[0059] Specifically, such as Figure 2 and Figure 3 As shown, the distribution valve 43 is located in the installation space 3 and can be fixed to the housing 1 by means of bolt connection, adhesive bonding or other methods.

[0060] like Figure 2 and Figure 3 As shown, there can be one distribution valve 43. One end of the distribution valve 43 is connected to the output pipeline of the hydraulic generation component 41, and the other end of the distribution valve 43 can be connected in series or in parallel with each hydraulic actuator 42 through a pipeline. The high-pressure hydraulic medium from the hydraulic generation component 41 is first delivered to the distribution valve 43, and then distributed by the distribution valve 43 before being input into each hydraulic actuator 42. Alternatively, there can be multiple distribution valves 43. The number of multiple distribution valves 43 can be the same as the number of multiple solid-state battery modules 2. One end of each distribution valve 43 is connected to the output pipeline of the hydraulic generation component 41, and each distribution valve 43 is connected to at least two hydraulic actuators 42 in the multiple sets of hydraulic actuators 42 corresponding to one solid-state battery module 2 through a pipeline. The high-pressure hydraulic medium from the hydraulic generation component 41 is first delivered to the multiple distribution valves 43, and then distributed by the distribution valves 43 before being input into each hydraulic actuator 42 corresponding to each set of solid-state battery modules 2.

[0061] In this embodiment, by setting a distribution valve 43, the hydraulic medium can be diverted to multiple hydraulic components. In this way, only one set of hydraulic generating components 41 is needed to drive all hydraulic actuators 42 to work synchronously, which simplifies the overall structure. At the same time, the distribution valve 43 is arranged in the installation space 3, making the overall structure more compact.

[0062] Example 7 Optionally, the hydraulic pressurization device 4 further includes a controller 5, which is electrically connected to the distribution valve 43. The controller 5 is used to control the distribution valve 43 to distribute hydraulic medium adapted to the target pressure requirement to the corresponding hydraulic actuator 42 according to the target pressure requirement of the solid-state battery module 2 corresponding to the hydraulic actuator 42.

[0063] Specifically, the controller 5 can be electrically connected to the distribution valve 43, which can be a solenoid valve, etc. The controller 5 can adjust the opening of the distribution valve 43 according to the target pressure requirements of different solid-state battery modules, thereby controlling the flow rate and pressure of the hydraulic medium input to the corresponding hydraulic actuator 42, so that different hydraulic actuators can output different clamping forces to adapt to the target pressure requirements of different solid-state battery modules.

[0064] In multiple solid-state battery modules 2, the target pressure requirements of different solid-state battery modules 2 under the same operating conditions may be the same or different. The pressure of the hydraulic medium required by each hydraulic actuator 42 corresponding to different solid-state battery modules 2 may be the same or different. When the target pressure requirements are the same, multiple hydraulic actuators 42 can be connected in series through the same pipeline. The controller 5 can control the distribution valve 43 to maintain a uniform opening and distribute hydraulic medium of the same pressure to each hydraulic actuator 42. When the target pressure requirements are different, each hydraulic actuator 42 can be connected in parallel through multiple pipelines. The controller 5 can control the opening of the distribution valve 43 corresponding to each pipeline and adjust the hydraulic medium pressure input to the hydraulic actuators 42 in different pipelines, so that the output pressure of different hydraulic actuators 42 is adapted to the pressure required by the corresponding solid-state battery module 2.

[0065] In this embodiment, the controller 5 controls the distribution valve 43, which can deliver hydraulic medium with matching pressure to the corresponding hydraulic actuator 42 according to the target pressure requirements of different solid-state battery modules 2, so as to achieve precise adjustment of the pressurization pressure of different modules, adapt to different working conditions, and further improve the overall adaptability and performance stability of solid-state batteries.

[0066] Example 8 Optionally, the hydraulic pressurizing device 4 further includes a first pipeline 44 and a second pipeline 45; the first pipeline 44 is located outside the installation space 3, and one end of the first pipeline 44 is connected to the hydraulic generating component 41, and the other end passes through the housing 1 and is connected to the distribution valve 43; the second pipeline 45 is located inside the installation space 3, and the second pipeline 45 is connected to a plurality of hydraulic actuators 42 and to the distribution valve 43.

[0067] Specifically, such as Figure 1 , Figure 2 and Figure 3 As shown, the first pipeline 44 may include an inlet pipe and an outlet pipe, which are respectively connected to the inlet and outlet of the hydraulic generating component 41.

[0068] The housing 1 is provided with a connecting hole corresponding to the position of the installation space 3. The connecting hole is connected to the installation space 3. The first pipeline 44 located outside the installation space 3 passes through the connecting hole and is connected to the connecting valve 422 located inside the installation space 3.

[0069] The second pipeline 45 is located within the installation space 3. The second pipeline 45 includes multiple branch pipelines, which are connected to the connecting valve 422. These branch pipelines connect multiple hydraulic actuators 42 in series and / or parallel. The high-pressure hydraulic medium, after being diverted by the distribution valve 43, is delivered to the hydraulic actuators 42 via the various branch pipelines of the second pipeline 45 to drive each hydraulic actuator 42 to output pressure. Thus, through the cooperation of the first pipeline 44 and the second pipeline 45, a stable delivery of the hydraulic medium can be achieved. Furthermore, by placing the first pipeline 44 outside the installation space 3 and the second pipeline 45 inside the installation space 3, the space occupied within the housing 1 is further reduced.

[0070] Furthermore, the partition 13 inside the housing 1 is provided with a clearance notch 131, which is used to avoid the second pipeline 45.

[0071] Example 9 Optionally, the hydraulic generating component 41 includes a drive unit 411 and a hydraulic master cylinder 412. The drive unit 411 is connected to the hydraulic master cylinder 412, and the hydraulic master cylinder 412 is connected to the hydraulic actuator 42. The drive unit 411 is used to drive the hydraulic master cylinder 412 to generate hydraulic power by compressing the hydraulic medium.

[0072] Specifically, the drive component 411 can be an electric drive component 411, a mechanical drive component 411, etc. The electric drive component 411 can be a servo motor, a stepper motor, etc. In some embodiments, when the drive component 411 is a motor, the hydraulic generating component 41 can also include a reducer connected between the motor and the hydraulic master cylinder 412 to reduce the output speed of the motor, thereby driving the hydraulic master cylinder 412 to generate stable high-pressure hydraulic power. The power of the motor can be 0.1-2 kW.

[0073] Driven by the drive unit 411, the hydraulic master cylinder 412 can compress the internal hydraulic medium to generate hydraulic power.

[0074] In practical applications, the hydraulic master cylinder 412 is driven by the drive component 411 to generate hydraulic power by compressing the hydraulic medium. This allows for convenient and precise control of the output pressure and the timing of pressurization, adapting to the pressurization requirements of the solid-state battery module 2 under different conditions and improving the control accuracy of the pressurization process.

[0075] Optionally, the hydraulic generating component 41 also includes a reservoir 413, which is connected to the hydraulic master cylinder 412. The reservoir 413 is used to provide hydraulic medium to the hydraulic master cylinder 412, continuously replenish the hydraulic medium to the hydraulic master cylinder 412, ensure the continuity of hydraulic power output, avoid insufficient pressure due to lack of fluid, and ensure the continuous stability of the pressurization process.

[0076] Example 10 The hydraulic generation component 41 also includes a control valve 414 connected to the hydraulic master cylinder 412. The control valve 414 is used to control the direction and flow rate of the hydraulic medium. In this embodiment, the direction and flow rate of the hydraulic medium in the hydraulic master cylinder 412 can be controlled by the control valve 414, thereby adjusting the magnitude of the hydraulic power to adapt to the different pressure requirements of the solid-state battery module 2 at different stages.

[0077] Example 11 Optionally, the hydraulic actuator 42 includes a hydraulic actuator cylinder 421 and a connecting valve 422. The connecting valve 422 is connected to and communicates with the hydraulic actuator cylinder 421. The connecting valve 422 is also connected to the hydraulic master cylinder 412. The hydraulic actuator cylinder 421 is connected to the housing 1, and the output end 4211 of the hydraulic actuator cylinder 421 is connected to the solid-state battery module 2.

[0078] Specifically, such as Figure 3 As shown, the hydraulic actuator 421 includes an actuator body 4212 and a fixed base 4213 disposed on the actuator body 4212. The fixed base 4213 and the frame 12 can be fixedly connected by multiple bolts to improve the connection strength and reliability of the hydraulic actuator 421.

[0079] The connecting valve 422 is located on the top of the actuator cylinder body 4212 and is connected to the interior of the actuator cylinder body 4212. The second pipeline 45 is connected to the connecting valve 422. Hydraulic medium can be input to or output to the interior of the actuator cylinder body 4212 through the connecting valve 422.

[0080] Under the action of high-pressure hydraulic medium, the output end 4211 of the hydraulic actuator 421 moves to apply pressure to the solid-state battery module 2.

[0081] In practical applications, the hydraulic actuator 421 has a simple structure and is easy to arrange in a small volume, which can reduce the volume of the installation space 3 occupied by the hydraulic actuator 42. The connecting valve 422 can input and output hydraulic oil to the hydraulic actuator 421.

[0082] In some embodiments, when there are multiple hydraulic actuators 42, the connecting valve 422 can be a four-way valve. The connecting valves 422 on two adjacent hydraulic actuators 421 are connected by a second pipeline 45. In this way, the connecting valve 422 can both input and output hydraulic oil to its own hydraulic actuator 421, and also serve as a pipeline channel to the next hydraulic actuator 421. This can reduce the length of the second pipeline 45 and reduce the installation space 3 occupied by the second pipeline 45.

[0083] Example 12 Optionally, the diameter of the hydraulic actuator 421 is 50mm-100mm; and / or, the pressurization displacement of the hydraulic actuator 421 is 1mm-100mm.

[0084] For example, the diameter of a single hydraulic actuator 421 can be 50mm, 60mm, 70mm, 80mm, 90mm, 100mm, etc., and the pressure displacement can be 1mm, 10mm, 20mm, 30mm, 40mm, 50mm, 60mm, 70mm, 80mm, 90mm, 100mm, etc. The diameter and pressure displacement range of the hydraulic actuator can be reasonably selected according to the total thickness variation range of the solid-state battery module.

[0085] In this embodiment, by making the diameter of the hydraulic actuator 421 50mm-100mm and / or the pressurization displacement of the hydraulic actuator 421 1mm-100mm, it can meet the pressurization requirements caused by volume changes during solid-state battery cycling, while avoiding the hydraulic actuator being too large and occupying too much installation space. This meets the design requirements for a compact internal housing and balances pressurization performance with space utilization.

[0086] Example 13 Optionally, the solid-state battery also includes a controller 5, which is electrically connected to the hydraulic pressurizing device 4. The controller 5 is used to control the hydraulic pressurizing device 4 to generate hydraulic power adapted to the target pressure requirement according to the target pressure requirement of the solid-state battery module 2.

[0087] Specifically, the controller 5 can be electrically connected to the drive unit 411 of the hydraulic pressurization device 4 via the communication harness 6. The target pressure requirement refers to the pressure requirement of the solid-state battery module 2 during the initial assembly stage, the charge-discharge cycle process, and the entire life cycle. This pressure requirement is determined based on the type and performance requirements of the solid-state battery cells.

[0088] In this embodiment, during the initial assembly stage, the controller 5 controls the hydraulic pressurizing device 4 to output an appropriate pre-tightening pressure according to the pressure requirements of the initial assembly stage, so as to meet the assembly requirements of the solid-state battery module 2.

[0089] During the charge and discharge cycle of the solid-state battery module 2, pressure fluctuations will occur in the solid-state battery module 2. The controller 5 can control the hydraulic pressurizing device 4 to output appropriate hydraulic power according to the pressure requirements of the charge and discharge cycle. In this way, the pressure can be adjusted in real time during the charge and discharge cycle so that the battery cell can achieve the best performance.

[0090] Throughout the entire life cycle of the solid-state battery module 2, the pressure of the solid-state battery module 2 will increase as the years of use accumulate. The controller 5 can control the hydraulic pressurization device 4 to output appropriate hydraulic power according to the pressure requirements of the entire life cycle. In this way, as the solid-state battery module 2 is used, the pressure is actively adjusted to meet the expansion force requirements of the entire life cycle.

[0091] Example 14 Optionally, the hydraulic pressurization device 4 also includes a detection unit connected to the solid-state battery module 2 and electrically connected to the controller 5. The detection unit is used to detect the pressure on the solid-state battery module 2 and to feed back a pressure signal to the controller 5.

[0092] Specifically, the detection unit is fixedly connected to the pressure-bearing surface of the solid-state battery module 2. The detection unit can be a pressure sensor or other pressure-detecting component. The pressure sensor has a pressure monitoring range of 0.1MPa-50MPa and an accuracy of 0.01MPa.

[0093] The detection unit can detect the actual pressure value borne by the solid-state battery module 2, and then feed the corresponding pressure signal back to the controller 5. The controller 5 can control the hydraulic pressurizing device 4 to adjust the output hydraulic power according to the pressure detected by the detection unit. In this way, precise closed-loop feedback control of pressure can be achieved, further meeting the pressurization requirements of the battery cell at each stage.

[0094] Example 15 Optionally, the solid-state battery module 2 includes a cell array 21 and an end plate 22. The end plate 22 is connected to the end of the cell array 21 and is connected to the hydraulic pressurizing device 4. A detection unit is connected to the side of the end plate 22 near the cell array 21. In practical applications, arranging the detection unit on the side of the end plate 22 near the cell array 21 allows for direct detection of the actual pressure on the cell array 21, resulting in higher detection accuracy and facilitating precise pressure closed-loop control by the controller 5.

[0095] In summary, the solid-state batteries of this application embodiment may include at least the following advantages: In this embodiment, the solid-state battery includes a housing 1, a solid-state battery module 2 disposed within a cavity 11 of the housing 1, and a hydraulic pressurizing device 4. The solid-state battery module 2 and the cavity wall of the cavity 11 enclose an installation space 3. The hydraulic pressurizing device 4 is at least partially disposed within the installation space 3 and is connected to the housing 1. The output end 4211 of the hydraulic pressurizing device 4 is connected to the solid-state battery module 2. The hydraulic pressurizing device 4 can generate hydraulic power by compressing the hydraulic medium and apply pressure to the solid-state battery module 2 under the action of the hydraulic power. In this way, the hydraulic pressurizing device 4 can apply sufficient pressure to the solid-state battery module 2 to meet the high-pressure pressurization requirements of the solid-state battery, thereby improving the conductivity and cycle performance of the solid-state battery and enabling the solid-state battery to be mass-produced and applied.

[0096] Example 16 like Figure 4 As shown, this application embodiment also provides a pressurization method, which is applied to any of the above-mentioned solid-state batteries. The pressurization method includes: S10: Control the hydraulic pressurization device 4 to generate hydraulic power by compressing the hydraulic medium, and apply pressure to the solid-state battery module 2 under the action of hydraulic power.

[0097] In this embodiment, the hydraulic pressurizing device 4 generates pressure and applies pressure to the solid-state battery module 2 under the action of hydraulic power. In this way, the hydraulic pressurizing device 4 can apply sufficient pressure to the solid-state battery module 2 to meet the high-voltage pressurization requirements of the solid-state battery, thereby improving the conductivity and cycle performance of the solid-state battery and enabling the solid-state battery to be mass-produced and applied.

[0098] Example 17 Optionally, if the hydraulic pressurizing device 4 includes a hydraulic generating component 41 and a hydraulic actuator 42, step S10 includes: S101: Controls the hydraulic generation component 41 to generate hydraulic power by compressing the hydraulic medium; S102: The hydraulic actuator 42 receives hydraulic power and applies pressure to the solid-state battery module 2 under the action of hydraulic power.

[0099] In practical applications, by controlling the hydraulic generating component 41 to generate hydraulic power through the compression of hydraulic medium, the hydraulic actuator 42 receives the hydraulic power and applies pressure to the solid-state battery module 2 under the influence of the hydraulic power. The hydraulic generating component 41 can output stable and sufficient hydraulic power, which is directly applied to the solid-state battery module 2 through the hydraulic actuator 42, thereby applying sufficient clamping force to the solid-state battery module 2, thus more accurately meeting the high-pressure pressurization requirements of the solid-state battery.

[0100] Specifically, the hydraulic generating component 41 includes a drive component 411 and a hydraulic master cylinder 412, and the hydraulic actuator 42 is a hydraulic actuator cylinder 421.

[0101] In step S101, as follows Figure 4 As shown, the controller 5 controls the start of the drive unit 411. The drive unit 411 can be a servo motor. Under the drive of the drive unit 411, the hydraulic master cylinder 412 can compress the internal hydraulic medium and generate hydraulic power by compressing the hydraulic medium.

[0102] In step S102, the hydraulic actuator 421, under the action of high-pressure hydraulic medium, moves its output end 4211 to apply pressure to the solid-state battery module 2.

[0103] Example 18 Optionally, step S101 includes: Step S1001: Obtain the target pressure requirement of solid-state battery module 2; Step S1002: Based on the target pressure requirement, control the hydraulic generation component 41 to generate hydraulic power that matches the target pressure requirement.

[0104] like Figure 4 As shown, in step S1001, the controller 5 obtains the target pressure requirement of the solid-state battery module 2. The target pressure requirement refers to the pressure requirement corresponding to the solid-state battery module in the initial assembly stage, the charge-discharge cycle process, or the entire life cycle. The pressure requirements in the initial assembly stage, the charge-discharge cycle process, and the entire life cycle are determined according to the type and performance requirements of the solid-state cell 311. Among them, the pressure requirement in the entire life cycle can refer to the EOL pressure requirement.

[0105] In step S1002, the controller 5 controls the hydraulic generating component 41 to generate hydraulic power that matches the pressure demand according to the pressure demand.

[0106] In this embodiment, during the initial assembly stage, the controller 5 controls the hydraulic pressurizing device 4 to output an appropriate pre-tightening pressure according to the pressure requirements of the initial assembly stage, so as to meet the assembly requirements of the solid-state battery module 2.

[0107] During the charge and discharge cycle of the solid-state battery module 2, pressure fluctuations will occur in the solid-state battery module 2. The controller 5 can control the hydraulic pressurizing device 4 to output appropriate hydraulic power according to the pressure requirements of the charge and discharge cycle. In this way, the pressure can be adjusted in real time during the charge and discharge cycle so that the battery cell can achieve the best performance.

[0108] Throughout the entire life cycle of the solid-state battery module 2, the pressure of the solid-state battery module 2 will increase as the years of use accumulate. The controller 5 can control the hydraulic pressurization device 4 to output appropriate hydraulic power according to the pressure requirements of the entire life cycle. In this way, as the solid-state battery module 2 is used, the pressure is actively adjusted to meet the expansion force requirements of the entire life cycle.

[0109] Example 19 Optionally, if the hydraulic pressurizing device 4 also includes a detection unit, S100 further includes: S1003: Obtain the pressure detected by the detection unit; S1004: Control the hydraulic power generated by the hydraulic generation component 41 according to the detected pressure.

[0110] In step S1003, such as Figure 4 As shown, the detection unit can detect the actual pressure value borne by the solid-state battery module 2, and then feed back the corresponding pressure signal to the controller 5.

[0111] In step S1004, the controller 5 can control the hydraulic power generated by the hydraulic generating component 41 according to the detected pressure.

[0112] In this embodiment, the controller 5 obtains the pressure of the detection unit and then controls the hydraulic pressurizing device 4 to adjust the output hydraulic power. This enables precise closed-loop feedback control of pressure, further meeting the pressurization requirements of the battery cell at each stage.

[0113] Example 20 This application embodiment also provides a hydraulic pressurizing device 4, at least part of which is disposed in the installation space 3 of the solid-state battery and connected to the housing 1 of the solid-state battery. The output end 4211 of the hydraulic pressurizing device 4 is connected to the solid-state battery module 2. The hydraulic pressurizing device 4 is used to generate hydraulic power by compressing the hydraulic medium and apply pressure to the solid-state battery module 2 under the action of the hydraulic power.

[0114] In this embodiment, since the hydraulic pressurizing device is at least partially disposed within the installation space and connected to the housing, and its output end is connected to the solid-state battery module, the hydraulic pressurizing device can generate hydraulic power by compressing the hydraulic medium and apply pressure to the solid-state battery module under the action of the hydraulic power. In this way, the hydraulic pressurizing device can apply sufficient pressure to the solid-state battery module to meet the high-pressure pressurization requirements of the solid-state battery, thereby improving the conductivity and cycle performance of the solid-state battery and enabling the solid-state battery to be mass-produced and applied.

[0115] Optionally, the hydraulic pressurization device 4 includes a hydraulic generating component 41 and a hydraulic actuator 42; the hydraulic generating component 41 is disposed outside the installation space 3 and is used to generate hydraulic power by compressing the hydraulic medium; the hydraulic actuator 42 is connected to the hydraulic generating component 41 and is disposed inside the installation space 3. The hydraulic actuator 42 is connected to the housing 1, and the output end 4211 of the hydraulic actuator 42 is connected to the solid-state battery module 2. The hydraulic actuator 42 is used to receive hydraulic power and apply pressure to the solid-state battery module 2 under the action of hydraulic power.

[0116] Optionally, there are multiple hydraulic actuators 42, all of which are connected to the hydraulic generation component 41. The multiple hydraulic actuators 42 are divided into multiple groups, and each group of hydraulic actuators 42 is set in a group of solid-state battery modules 2.

[0117] Optionally, each set of hydraulic actuators 42 includes at least two spaced-apart hydraulic actuators 42.

[0118] Optionally, the hydraulic pressurizing device 4 further includes at least one distribution valve 43, which is located in the installation space 3 and connected to the housing 1. The distribution valve 43 is connected to the hydraulic generating component 41 and to a plurality of hydraulic actuators 42. The distribution valve 43 is used to receive hydraulic medium from the hydraulic generating component 41 and distribute the hydraulic medium to the plurality of hydraulic actuators 42.

[0119] Optionally, the hydraulic pressurization device 4 further includes a controller 5, which is electrically connected to the distribution valve 43. The controller 5 is used to control the distribution valve 43 to distribute hydraulic medium adapted to the target pressure requirement to the corresponding hydraulic actuator 42 according to the target pressure requirement of the solid-state battery module 2 corresponding to the hydraulic actuator 42.

[0120] Optionally, the hydraulic pressurizing device 4 further includes a first pipeline 44 and a second pipeline 45; the first pipeline 44 is located outside the installation space 3, and one end of the first pipeline 44 is connected to the hydraulic generating component 41, and the other end passes through the housing 1 and is connected to the distribution valve 43; the second pipeline 45 is located inside the installation space 3, and the second pipeline 45 is connected to a plurality of hydraulic actuators 42 and to the distribution valve 43.

[0121] Optionally, the hydraulic generating component 41 includes a drive unit 411 and a hydraulic master cylinder 412. The drive unit 411 is connected to the hydraulic master cylinder 412, and the hydraulic master cylinder 412 is connected to the hydraulic actuator 42. The drive unit 411 is used to drive the hydraulic master cylinder 412 to generate hydraulic power by compressing the hydraulic medium.

[0122] The hydraulic generation component 41 also includes a control valve 414 connected to the hydraulic master cylinder 412. The control valve 414 is used to control the direction and flow rate of the hydraulic medium. In this embodiment, the direction and flow rate of the hydraulic medium in the hydraulic master cylinder 412 can be controlled by the control valve 414, thereby adjusting the magnitude of the hydraulic power to adapt to the different pressure requirements of the solid-state battery module 2 at different stages.

[0123] Optionally, the hydraulic actuator 42 includes a hydraulic actuator cylinder 421 and a connecting valve 422. The connecting valve 422 is connected to and communicates with the hydraulic actuator cylinder 421. The connecting valve 422 is also connected to the hydraulic master cylinder 412. The hydraulic actuator cylinder 421 is connected to the housing 1, and the output end 4211 of the hydraulic actuator cylinder 421 is connected to the solid-state battery module 2.

[0124] Optionally, the hydraulic pressurization device 4 also includes a detection unit connected to the solid-state battery module 2 and electrically connected to the controller 5. The detection unit is used to detect the pressure on the solid-state battery module 2 and to feed back a pressure signal to the controller 5.

[0125] For a detailed explanation of any of the above embodiments, please refer to the foregoing embodiments, which will not be repeated here.

[0126] Example 21 This application also provides a terminal, which includes: a solid-state battery as described in any of the above embodiments, or a hydraulic pressurizing device 4 as described in any of the above embodiments; or the terminal uses a pressurizing method as described in any of the above embodiments.

[0127] The terminal can be a vehicle, a robot, or something similar.

[0128] It should be noted that the structures of the hydraulic pressurizing device 4 and the solid-state battery in this embodiment are the same as those in any of the above embodiments, and their beneficial effects are also similar, so they will not be described in detail here. The steps of the pressurizing method described in this embodiment are the same as those in any of the above embodiments, and their beneficial effects are also similar, so they will not be described in detail here.

[0129] It should be noted that the solid-state battery, pressurization method, hydraulic pressurization device, and terminal involved in the above embodiments may include at least one of Embodiments 1 to 21. For example, Embodiment 1 can be implemented as an independent embodiment, Embodiments 1+2 can be implemented as independent embodiments, Embodiments 1+2+3 can be implemented as independent embodiments, Embodiments 1+2+4 can be implemented as independent embodiments, Embodiments 1+2+3+4 can be implemented as independent embodiments, Embodiments 1+2+4+5 can be implemented as independent embodiments, Embodiments 1+2+3+4+5 can be implemented as independent embodiments, Embodiments 1+2+4+6 can be implemented as independent embodiments, Embodiments 1+2+3+4+6 can be implemented as independent embodiments, Embodiments 1+2+4+5+6 can be implemented as independent embodiments, Embodiments 1+2+3+4+5+6 can be implemented as independent embodiments, Embodiments 1+2+4+6+7 can be implemented as independent embodiments, and Embodiments 1+2+3+4+6+7 can be implemented as independent embodiments. Examples 1+2+4+5+6+7 can be implemented as independent examples, examples 1+2+3+4+5+6+7 can be implemented as independent examples, examples 1+2+4+6+8 can be implemented as independent examples, examples 1+2+3+4+6+8 can be implemented as independent examples, examples 1+2+4+5+6+8 can be implemented as independent examples, examples 1+2+3+4+5+6+8+9 can be implemented as independent examples, examples 1+2+4+6+7+8+8 can be implemented as independent examples, examples 1+2+4+5+6+7+8+9 can be implemented as independent examples, examples 1+2+3+4+5+6+7+8+9 can be implemented as independent examples, and so on, but are not limited to these, and will not be listed one by one here.

[0130] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more sets of embodiments or examples.

[0131] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A solid-state battery, characterized in that, The solid-state battery includes: Box (1), the box (1) having a receiving cavity (11); Solid-state battery module (2), the solid-state battery module (2) is disposed in the receiving cavity (11), and the cavity wall of the receiving cavity (11) is enclosed to form an installation space (3). And a hydraulic pressurizing device (4), at least part of the hydraulic pressurizing device (4) is disposed in the installation space (3), and the hydraulic pressurizing device (4) is connected to the housing (1), the output end (4211) of the hydraulic pressurizing device (4) is connected to the solid battery module (2), the hydraulic pressurizing device (4) is used to generate hydraulic power by compressing hydraulic medium, and apply pressure to the solid battery module (2) under the action of hydraulic power.

2. The solid-state battery according to claim 1, characterized in that, The hydraulic pressurization device (4) includes a hydraulic generation component (41) and a hydraulic actuator (42). The hydraulic generating component (41) is disposed outside the installation space (3), and the hydraulic generating component (41) is used to generate hydraulic power by compressing the hydraulic medium; The hydraulic actuator (42) is connected to the hydraulic generating component (41). The hydraulic actuator (42) is located in the installation space (3). The hydraulic actuator (42) is connected to the housing (1). The output end (4211) of the hydraulic actuator (42) is connected to the solid-state battery module (2). The hydraulic actuator (42) is used to receive hydraulic power and apply pressure to the solid-state battery module (2) under the action of hydraulic power.

3. The solid-state battery according to claim 2, characterized in that, The box (1) includes a frame (12), and the receiving cavity (11) is disposed within the frame (12); The solid-state battery module (2) includes a cell array (21) and an end plate (22) disposed at the end of the cell array (21). The mounting space (3) is formed between the end plate (22) and the frame (12); The hydraulic actuator (42) is fixedly connected to the side of the frame (12) near the receiving cavity (11), and the output end (4211) of the hydraulic actuator (42) is connected to the end plate (22).

4. The solid-state battery according to claim 2 or 3, characterized in that, The solid-state battery module (2) is provided in multiple sets, and the multiple sets of solid-state battery modules (2) are disposed in the receiving cavity (11); The number of hydraulic actuators (42) is multiple, and all of the hydraulic actuators (42) are connected to the hydraulic generation component (41). The multiple hydraulic actuators (42) are divided into multiple groups, and each group of hydraulic actuators (42) is set in a group of solid-state battery modules (2).

5. The solid-state battery module (2) according to claim 4, characterized in that, Each set of hydraulic actuators includes at least two hydraulic actuators (42) spaced apart.

6. The solid-state battery according to claim 4 or 5, characterized in that, The hydraulic pressurizing device (4) further includes at least one distribution valve (43), which is located in the installation space (3) and connected to the housing (1). The distribution valve (43) is connected to the hydraulic generating component (41) and to a plurality of hydraulic actuators (42). The distribution valve (43) is used to receive hydraulic medium from the hydraulic generating component (41) and distribute the hydraulic medium to the plurality of hydraulic actuators (42).

7. The solid-state battery according to claim 6, characterized in that, The hydraulic pressurization device (4) further includes a controller (5), which is electrically connected to the distribution valve (43). The controller (5) is used to control the distribution valve (43) to distribute hydraulic medium adapted to the target pressure requirement to the corresponding hydraulic actuator (42) according to the target pressure requirement of the solid-state battery module (2) corresponding to the hydraulic actuator (42).

8. The solid-state battery according to claim 6, characterized in that, The hydraulic pressurizing device (4) also includes a first pipeline (44) and a second pipeline (45); The first pipeline (44) is located outside the installation space (3), and one end of the first pipeline (44) is connected to the hydraulic generating component (41), and the other end passes through the box (1) and is connected to the distribution valve (43); The second pipeline (45) is located within the installation space (3) and is connected to a plurality of the hydraulic actuators (42) and to the distribution valve (43).

9. The solid-state battery according to any one of claims 2-8, characterized in that, The hydraulic generating component (41) includes a drive unit (411) and a hydraulic master cylinder (412). The drive unit (411) is connected to the hydraulic master cylinder (412), and the hydraulic master cylinder (412) is connected to the hydraulic actuator (42). The drive unit (411) is used to drive the hydraulic master cylinder (412) to generate hydraulic power by compressing the hydraulic medium.

10. The solid-state battery according to claim 9, characterized in that, The hydraulic generating assembly (41) also includes a control valve (414) connected to the hydraulic master cylinder (412), which is used to control the direction and flow rate of the hydraulic medium.

11. The solid-state battery according to claim 9 or 10, characterized in that, The hydraulic actuator (42) includes a hydraulic actuator cylinder (421) and a connecting valve (422). The connecting valve (422) is connected to the hydraulic actuator cylinder (421) and communicates with the hydraulic actuator cylinder (421). The connecting valve (422) is connected to the hydraulic master cylinder (412). The hydraulic actuator cylinder (421) is connected to the housing (1), and the output end (4211) of the hydraulic actuator cylinder (421) is connected to the solid-state battery module (2).

12. The solid-state battery according to claim 11, characterized in that, The diameter of the hydraulic actuator (421) is 50mm-100mm; And / or, the pressurized displacement of the hydraulic actuator (421) is 1mm-100mm.

13. The solid-state battery according to any one of claims 1-12, characterized in that, The solid-state battery also includes a controller (5), which is electrically connected to the hydraulic pressurization device (4); The controller (5) is used to control the hydraulic pressurization device (4) to generate hydraulic power that is adapted to the target pressure requirement of the solid-state battery module (2).

14. The solid-state battery according to claim 13, characterized in that, The hydraulic pressurization device (4) also includes a detection unit, which is connected to the solid-state battery module (2) and electrically connected to the controller (5); The detection unit is used to detect the pressure on the solid-state battery module (2) and to feed back the pressure signal to the controller (5).

15. The solid-state battery according to claim 14, characterized in that, The solid-state battery module (2) includes a cell array (21) and an end plate (22). The end plate (22) is connected to the end of the cell array (21) and is connected to the hydraulic pressurizing device (4). The detection unit is connected to the end plate (22) on the side near the cell array (21).

16. A pressurization method, characterized in that, The pressurization method includes: The hydraulic pressurization device (4) generates hydraulic power by compressing the hydraulic medium and applies pressure to at least one solid-state battery module (2) under the action of the hydraulic power.

17. The pressurization method according to claim 16, characterized in that, When the hydraulic pressurizing device (4) includes a hydraulic generating component (41) and a hydraulic actuator (42), the controlled hydraulic pressurizing device (4) generates hydraulic power by compressing the hydraulic medium and applies pressure to the solid-state battery module (2) under the action of the hydraulic power. The hydraulic generating component (41) is controlled to generate hydraulic power by compressing the hydraulic medium; The hydraulic actuator (42) receives hydraulic power and applies pressure to the solid-state battery module (2) under the action of hydraulic power.

18. The pressurization method according to claim 17, characterized in that, The hydraulic power generation control assembly (41) generates hydraulic power by compressing hydraulic medium, including: Obtain the target pressure requirement of the solid-state battery module (2); Based on the pressure requirement, the hydraulic generating component (41) is controlled to generate hydraulic power that matches the target pressure requirement.

19. The pressurization method according to claim 17, characterized in that, In the case where the hydraulic pressurization device (4) also includes a detection unit, the hydraulic power generation control assembly (41) that generates hydraulic power by compressing the hydraulic medium further includes: Obtain the pressure detected by the detection unit; The hydraulic power generated by the hydraulic generating component (41) is controlled according to the detected pressure.

20. A hydraulic pressurization device, characterized in that, At least part of the hydraulic pressurizing device (4) is disposed in the installation space (3) of the solid-state battery, and the hydraulic pressurizing device (4) is connected to the housing (1) of the solid-state battery. The output end (4211) of the hydraulic pressurizing device (4) is connected to the solid-state battery module (2) of the solid-state battery. The hydraulic pressurizing device (4) is used to generate hydraulic power by compressing the hydraulic medium and apply pressure to the solid-state battery module (2) under the action of the hydraulic power.

21. A terminal, characterized in that, The terminal includes: a solid-state battery as described in any one of claims 1-15, or a hydraulic pressurizing device (4) as described in claim 20; or the terminal uses a pressurizing method as described in any one of claims 16-19.

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