Solid-state cell charging and discharging equipment and charging and discharging method

Abstract

The invention provides solid-state battery cell charging and discharging equipment and a charging and discharging method, and relates to the field of solid-state battery manufacturing. A plurality of battery cells can be arranged in the inner cavity of the main body at the same time, the charging and discharging device is connected with the plurality of battery cells at the same time, and then the inner cavity is filled with a liquid medium, so that the inner cavity is in an isostatic pressing state, namely, the pressure of each position of each battery cell is kept the same; and then the inner cavity is pressurized by the pressurizing device, and the charging and discharging of the solid-state battery core are realized by the charging and discharging device. Therefore, the battery cells can be pressurized in the charging and discharging process of the solid-state battery cells, and based on the existence of the liquid medium, the pressure applied to each position of each battery cell can be ensured to be equal, and air can be isolated to improve the safety of the battery cells during charging and discharging. In addition, the main body is also connected with a temperature control device, and the temperature control device can adjust the temperature of the inner cavity so as to realize accurate control of the temperature of the environment of the battery cell.

Description

Technical Field

[0001] This application relates to the field of solid-state battery manufacturing, and in particular to a solid-state battery cell charging and discharging device and charging and discharging method. Background Technology

[0002] Solid-state lithium-ion batteries, lacking electrolyte, require 10 to 100 times greater pressure than traditional liquid batteries to maintain tight contact at the solid-solid interface, ensuring smooth lithium-ion transport between particles and the interface. Currently, in applications, pressure is typically applied to the cells through module structures. In manufacturing, however, the cells are usually pressurized during charging and discharging using a press. The high required pressure (approximately 100 to 1000 tons) easily leads to bending and deformation of the press fixtures, resulting in poor pressure uniformity at the cells. Furthermore, existing presses cannot control the temperature during pressurization, limiting their flexibility. Additionally, if thermal runaway occurs during charging and discharging, the cells in direct contact with air are highly susceptible to explosion, potentially damaging the press and causing significant asset losses. Summary of the Invention

[0003] In view of this, the purpose of this application is to provide a solid-state battery cell charging and discharging device and charging and discharging method to solve the problems of the current method of pressurizing solid-state battery cells during charging and discharging by means of a press, which cannot guarantee the uniformity of the pressure on the battery cell, cannot control the temperature during the pressurization process, and has poor safety.

[0004] In accordance with the above objectives, a first aspect of the present invention provides a solid-state battery cell charging and discharging device, wherein the solid-state battery cell charging and discharging device comprises: The main body has an inner cavity for placing solid-state battery cells, the inner cavity being capable of being filled with a liquid medium to form an isostatic pressure state; the inner cavity is also connected to a pressurization device; A charging and discharging device is detachably connected to the solid-state battery cell. A temperature control device is connected to the main body to adjust the temperature of the inner cavity.

[0005] Preferably, the inner cavity extends through the end face of the main body along a first direction to form a corresponding opening on the end face of the main body; the opening is detachably connected to a corresponding plug; When the plug is connected to the opening, the inner cavity is formed into a relatively sealed cavity; When the plug separates from the opening, the inner cavity communicates with the external space.

[0006] Preferably, the plug is connected to a first driving member, the driving end of the first driving member being able to reciprocate along the first direction, so as to drive the plug to connect or separate from the opening accordingly; The solid-state battery cell charging and discharging device also includes a guide rail extending along a second direction. The first driving member is connected to a slider that is slidably connected to the guide rail. When the plug separates from the opening, the plug can move synchronously with the first driving member along the second direction.

[0007] Preferably, a first wire harness is disposed inside the plug; a first end of the first wire harness is integrated into the inner end face of the plug and formed into a plug; a second end of the first wire harness is located in the charging and discharging device.

[0008] Preferably, the solid-state battery cell charging and discharging device further includes a bracket detachably connected to the main body, the bracket being used to support the solid-state battery cell.

[0009] Preferably, the bracket is formed as a frame structure, and the bracket has a plurality of limiting parts, each of which corresponds to a solid-state battery cell; The bracket also has a connecting portion, and when the solid-state battery cell is placed in the corresponding limiting portion, the tab of the solid-state battery cell is electrically connected to the connecting portion.

[0010] Preferably, the bracket has a plurality of second wire harnesses inside, the first end of the second wire harnesses extending to the connecting portion to be electrically connected to the corresponding tab; the second end of the second wire harnesses is integrated into the outer side of the bracket and formed into a socket corresponding to the plug. When the plug is connected to the opening, the plug is inserted into the socket.

[0011] Preferably, the inner cavity is connected to a low-pressure pipeline and a high-pressure pipeline; the liquid medium can fill the inner cavity through the low-pressure pipeline to form the isostatic pressure state of the inner cavity; the pressurizing medium in the pressurizing device can enter the inner cavity through the high-pressure pipeline to increase or keep the pressure of the inner cavity constant.

[0012] Preferably, the main body further forms a temperature-regulating cavity covering the outer part of the inner cavity, the temperature-regulating cavity being connected to the temperature control device via a temperature-regulating pipeline; the temperature control device includes a cooling source and a heating source.

[0013] According to a second aspect of the present invention, a solid-state battery cell charging and discharging method is provided, applied to the solid-state battery cell charging and discharging device described above, wherein the solid-state battery cell charging and discharging method includes the following steps: S10: Place the solid-state battery cell into the inner cavity of the main body accordingly; S20: Connect the charging and discharging device to the solid-state battery cell accordingly; S30: Adjust the inner cavity to form an isostatic pressure state; S40: The pressure in the inner cavity is increased to the target value by the pressurizing device and maintained at that pressure; S50: Adjust the temperature of the inner cavity using the temperature control device; S60: Charge and discharge the solid-state battery cell using the charging and discharging device; S70: Collect the solid-state battery cell after it has been charged and discharged.

[0014] According to the solid-state battery cell charging and discharging device and method of the present invention, multiple battery cells can be simultaneously arranged in the inner cavity of the main body, and the charging and discharging device can be connected to the multiple battery cells simultaneously. Then, a liquid medium is filled into the inner cavity to form an isostatic pressure state, so that the pressure at all points of each battery cell remains the same. Then, the inner cavity is pressurized by a pressurizing device, and the charging and discharging device is used to realize the charging and discharging of the solid-state battery cells. In this way, the battery cells can be pressurized during the charging and discharging process of the solid-state battery cells. Due to the presence of the liquid medium, the pressure at all points of each battery cell can be guaranteed to be equal, and air can be isolated to improve the safety of the battery cells during charging and discharging.

[0015] In addition, the main body is also connected to a temperature control device, which can adjust the temperature of the inner cavity to achieve precise control of the temperature of the environment of the battery cell.

[0016] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of a solid-state battery charging and discharging device according to the present invention; Figure 2 This is a schematic diagram of the bracket according to the present invention.

[0019] Icons: 1-Main body; 11-End cap; 21-First driving component; 22-Second driving component; 23-Slider; 24-Guide rail; 31-Low-pressure pipeline; 32-High-pressure pipeline; 41-Temperature control device; 421-Cooling pipeline; 422-Heating pipeline; 51-First wiring harness; 52-Charging and discharging device; 6-Bracket; 611-Horizontal column; 612-Horizontal bar; 62-Tray; 63-Cover plate. Detailed Implementation The following detailed embodiments are provided to help the reader gain a comprehensive understanding of the methods, apparatus, and / or systems described herein. However, various changes, modifications, and equivalents of the methods, apparatus, and / or systems described herein will be apparent after understanding the disclosure of this application. For example, the order of operations described herein is merely illustrative and is not limited to the order set forth herein; changes that will be apparent after understanding the disclosure of this application are possible, except for operations that must occur in a specific order. Furthermore, for clarity and brevity, descriptions of features known in the art may be omitted.

[0020] The features described herein may be implemented in different forms and should not be construed as being limited to the examples described herein. Rather, the examples described herein have been provided merely to illustrate some of the many feasible ways of implementing the methods, apparatus, and / or systems described herein that will be apparent upon understanding the disclosure of this application.

[0021] Throughout the specification, when an element (such as a layer, region, or substrate) is described as being "on" another element, "connected to" another element, "bonded to" another element, "on" another element, or "covering" another element, it may be directly "on" another element, "connected to" another element, "bonded to" another element, "on" another element, or "covering" another element, or there may be one or more other elements in between. In contrast, when an element is described as being "directly on" another element, "directly connected to" another element, "directly bonded to" another element, "directly on" another element, or "directly covering" another element, there may be no other elements in between.

[0022] As used herein, the term “and / or” includes any one of the relevant items listed and any combination of any two or more items.

[0023] Although terms such as “first,” “second,” and “third” may be used herein to describe individual components, assemblies, regions, layers, or parts, these components, assemblies, regions, layers, or parts are not limited by these terms. Rather, these terms are used only to distinguish one component, assembly, region, layer, or part from another. Therefore, without departing from the teachings of the examples described herein, the first component, assembly, region, layer, or part referred to as the second component, assembly, region, layer, or part may also be referred to as the second component, assembly, region, layer, or part.

[0024] For ease of description, spatial relation terms such as “above,” “upper,” “below,” and “lower” are used herein to describe the relationship between one element and another, as shown in the accompanying drawings. Such spatial relation terms are intended to include not only the orientation depicted in the drawings but also different orientations of the device during use or operation. For example, if the device in the drawings is flipped, an element described as being “above” or “upper” relative to another element will subsequently be “below” or “lower” relative to that other element. Therefore, the term “above” includes both “above” and “below” orientations depending on the spatial orientation of the device. The device may also be positioned in other ways (e.g., rotated 90 degrees or in other orientations), and the spatial relation terms used herein will be interpreted accordingly.

[0025] The terminology used herein is for the purpose of describing various examples only and is not intended to limit this disclosure. Unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. The terms “comprising,” “including,” and “having” enumerate the stated features, quantities, operations, components, elements, and / or combinations thereof, but do not exclude the presence or addition of one or more other features, quantities, operations, components, elements, and / or combinations thereof.

[0026] Variations in the shapes shown in the accompanying drawings may occur due to manufacturing techniques and / or tolerances. Therefore, the examples described herein are not limited to the specific shapes shown in the accompanying drawings, but include changes in shape that may occur during manufacturing.

[0027] The features of the examples described herein can be combined in various ways that will be apparent upon understanding the disclosure of this application. Furthermore, although the examples described herein have a wide variety of constructions, other constructions are possible, as will be apparent upon understanding the disclosure of this application.

[0028] According to a first aspect of the present invention, a solid-state battery cell charging and discharging device is provided, such as... Figure 1 As shown, the solid-state battery charging and discharging device in this embodiment includes a main body 1 and a charging and discharging device 52, a temperature control device 41, a pressurizing device, etc., connected to the main body 1. This device enables pressurization of the solid-state battery during charging and discharging, and effectively ensures the uniformity of the pressure borne by the solid-state battery. The specific connection and positional relationships of the above-mentioned components of the solid-state battery charging and discharging device according to the present invention will be described in detail below.

[0029] In this embodiment, as Figure 1As shown, the main body 1 is formed into a cuboid-like structure with a similarly shaped inner cavity inside. Further, the inner cavity of the main body 1 extends through the end face of the main body 1 along a first direction (i.e., the length direction of the main body 1), forming a corresponding opening at the end face of the main body 1. This allows the solid-state battery cell to be placed into or removed from the inner cavity through this opening. Furthermore, a corresponding plug 11 is detachably connected to this opening. When the plug 11 is connected to the opening, the inner cavity forms a relatively sealed cavity to facilitate the introduction of the liquid medium and pressurized medium. When the plug 11 is separated from the opening, the inner cavity communicates with the external space to facilitate the insertion or removal of the solid-state battery cell.

[0030] Specifically, such as Figure 1 As shown, in this embodiment, the plug 11 is connected to or separated from the opening via a first driving member 21. The driving end of the first driving member 21 is fixedly connected to the (outer end face) of the plug 11, so as to drive the plug 11 to reciprocate along the first direction, thereby driving the plug 11 to connect or separate from the opening accordingly. The form and number of the first driving member 21 are not fixed. For example, in this embodiment, the first driving member 21 is set as a hydraulic cylinder, and the plug 11 is connected to the telescopic rod of the hydraulic cylinder; in addition, there are two hydraulic cylinders to improve the stability of the plug 11 when moving along the first direction.

[0031] Furthermore, a slider 23 is fitted onto the outer side of the first driving member 21. A guide rail 24 corresponding to the slider 23 can be laid in the installation area, meaning the slider 23 and guide rail 24 are slidably connected. The guide rail 24 extends along a second direction, and a second driving member 22 is fixed to the end of the guide rail 24 via a baffle. The driving end of the second driving member 22 can reciprocate along the second direction. Additionally, the driving end of the second driving member 22 is fixedly connected to the slider 23, so that when the plug 11 separates from the opening, the second driving member 22 can drive the slider 23, the first driving member 21, and the plug 11 to reciprocate synchronously along the guide rail 24. Thus, when it is necessary to place or remove the solid-state battery cell, the second driving member 22 can drive the plug 11 away from the opening, providing sufficient operating space for the placement or removal of the solid-state battery cell.

[0032] Similar to the first driving member 21, there are no fixed restrictions on the specific form and quantity of the second driving member 22. For example, the second fixing member can also be formed as a hydraulic cylinder, as long as the above-mentioned technical effects can be achieved. Preferably, the second direction is essentially the width direction of the main body 1, which facilitates the connection between the plug 11 and the opening.

[0033] In this embodiment, although not shown in the figure, a first wiring harness 51 is provided inside the plug 11. The first end of the first wiring harness 51 is integrated into the inner end face of the plug 11 (near the inner cavity) and formed as a plug. The second end of the first wiring harness 51 extends to the outside of the plug 11 and is specifically located in the charging and discharging device 52. Thus, the charging and discharging device 52 can charge and discharge the solid-state battery cell through the first wiring harness 51. Correspondingly, in order to improve the efficiency of battery cell charging and discharging, the electrical connection part of the solid-state battery cell is also integrated.

[0034] Specifically, the solid-state battery cell is detachably connected to the main body 1 via a bracket 6. That is, the solid-state battery cell can be detachably connected to the bracket 6, and the bracket 6 can also be detachably connected to the inner cavity of the main body 1. The bracket 6 is formed as a frame structure with multiple limiting parts. Each limiting part corresponds one-to-one with a solid-state battery cell. The specific structure of the bracket 6 is not limited; for example, in this embodiment, such as… Figure 2 As shown, the support 6 may include multiple horizontal columns 611, and the multiple horizontal columns 611 pass through the tray 62 (in this embodiment, the four horizontal columns 611 pass through the four corners of each tray 62); in addition, the support 6 also includes two crossbars 612, which can be supported on the bottom of the tray 62 by a detachable connection method such as snap-fit, so as to increase the strength of the overall structure of the support 6.

[0035] Each tray 62 has a groove corresponding to the battery cell as a limiting part. After the battery cell is placed in the groove, a corresponding cover plate 63 is provided at the opening of the groove to fix the battery cell in the groove (the connection between the cover plate 63 and the tray 62 can be a detachable connection such as a snap-fit). Since the tray 62 is detachably connected to the cross post 611 and the cross bar 612, during the assembly process of the solid battery cell and the bracket 6, the solid battery cell can be fixed in the limiting part first, and then the tray 62 containing the battery cell can be passed through the cross post 611 and correspondingly snapped and fixed to the cross bar 612, so that multiple solid battery cells can be stably placed in the inner cavity of the main body 1 in an approximately stacked manner.

[0036] To further improve the stability of the solid-state battery cell when connected to the main body 1, a snap-fit ​​structure can also be provided in the limiting part; or a limiting structure for the bracket 6 can be provided in the inner cavity, for example, a protrusion can be provided on the inner wall of the inner cavity, and a recess corresponding to the protrusion can be provided on the corresponding horizontal column 611.

[0037] Furthermore, the bracket 6 also has multiple connecting portions that correspond to the tabs of the solid-state battery cells. That is, when the solid-state battery cell is placed in the corresponding limiting portion, the tab of the solid-state battery cell can be electrically connected to the corresponding connecting portion. In addition, the bracket 6 also has multiple second wiring harnesses inside. The first end of the second wiring harness extends to the corresponding connecting portion to be electrically connected to the corresponding tab. The second end of the second wiring harness is integrated into the outer side of the bracket 6 and forms a socket corresponding to the plug. Thus, when the plug 11 is connected to the corresponding opening, the plug and the socket can be inserted into each other. In this way, the charging and discharging device 52 can be electrically connected to multiple battery cells through the first wiring harness 51 and the second wiring harness to charge and discharge multiple battery cells simultaneously.

[0038] It should be noted that the above-mentioned electrode tabs are electrically connected to the charging / discharging device 52 via the second wiring harness and the first wiring harness 51, which is a conventional technical means in this field. Therefore, the specific structure of the connection part, the forming principle and structure of the plug and socket, etc., will not be described in detail. In addition, the number and position of the connection part, the position and specifications of the plug and socket, etc., are not fixed, as long as the above-mentioned technical effects can be achieved. The charging / discharging device 52 can be any existing charging / discharging device 52.

[0039] In this embodiment, as Figure 1 As shown, the inner cavity is connected to a low-pressure pipeline 31 and a high-pressure pipeline 32. Although not shown in the figure, the other end of the low-pressure pipeline 31 is connected to a liquid source, allowing the liquid medium in the liquid source to fill the inner cavity of the main body 1 through the low-pressure pipeline 31, thus creating an isostatic pressure state within the inner cavity. The other end of the high-pressure pipeline 32 is connected to a pressurizing device, allowing the pressurizing medium in the pressurizing device to enter the inner cavity through the high-pressure pipeline 32, thereby increasing or maintaining a constant pressure within the inner cavity. Both the liquid medium and the pressurizing medium must be high-boiling-point, highly insulating, and non-flammable liquids, such as silicone oil or insulating oil.

[0040] Thus, before charging and discharging multiple solid-state cells through the charging and discharging device 52, the inner cavity of the main body 1 can be adjusted to an isostatic pressure state through the low-pressure pipeline 31, and then the inner cavity can be pressurized to the target value and maintained through the high-pressure pipeline 32. Based on the characteristics of the liquid medium and the pressurizing medium, each part of each cell can be subjected to the same pressure during the charging and discharging process, and the cell can be isolated from the air, thereby effectively ensuring the uniformity of cell pressurization and preventing the cell from burning or exploding under short-circuit conditions, effectively improving the safety of cell charging, discharging and pressurization processes.

[0041] It should be noted that corresponding valve components and pump components are also provided on the low-pressure pipeline 31 and the high-pressure pipeline 32 to control the inflow and outflow of liquid medium and pressurized medium. This process is a conventional technical means in this field and will not be described in detail. In addition, in order to improve the integration of this device, the charging and discharging equipment, liquid source, and pressurizing device (not shown in the figure) are integrated into a mounting frame in this embodiment.

[0042] In this embodiment, the main body 1 also forms a temperature-regulating cavity covering the outer part of the aforementioned inner cavity. This temperature-regulating cavity is connected to the temperature control device 41 via a temperature-regulating pipeline. Specifically, the temperature control device 41 includes a cooling source and a heating source. The cooling source contains a cooling medium, and the heating source contains a high-temperature medium. The temperature-regulating pipeline includes a cooling pipeline 421 and a heating pipeline 422, which are respectively connected to the cooling source and the heating source. When the cooling medium is introduced into the temperature-regulating cavity through the cooling pipeline 421, the inner cavity can be cooled. When the high-temperature medium is introduced into the temperature-regulating cavity through the heating pipeline 422, the inner cavity can be heated. Thus, the temperature of the inner cavity can be flexibly controlled according to the actual situation. Similarly, corresponding valve components and pump components are also provided on the temperature-regulating pipeline, which will not be described in detail here.

[0043] It should be noted that the operation or shutdown of the above-mentioned pump components, valve components, and drive components can be achieved by the corresponding control modules, which are existing technologies and will not be described in detail here.

[0044] According to the solid-state battery charging and discharging device of the present invention as described above, multiple battery cells can be simultaneously disposed in the inner cavity of the main body 1, and the charging and discharging device 52 can be simultaneously connected to the multiple battery cells. Then, a liquid medium is filled into the inner cavity to form an isostatic pressure state, so that the pressure at all points of each battery cell remains the same. Then, the inner cavity is pressurized by a pressurizing device, and the charging and discharging device 52 is used to realize the charging and discharging of the solid-state battery cells. In this way, the battery cells can be pressurized simultaneously during the charging and discharging process of the solid-state battery cells efficiently. Based on the presence of the liquid medium, it can be ensured that the pressure at all points of each battery cell is equal, and air can be isolated to improve the safety of the battery cells during charging and discharging.

[0045] In addition, the main body 1 is also connected to a temperature control device 41, which can adjust the temperature of the inner cavity to achieve precise control of the temperature of the environment of the battery cell.

[0046] According to a second aspect of the present invention, a solid-state battery cell charging and discharging method is provided, applied to the solid-state battery cell charging and discharging device described above. Specifically, the solid-state battery cell charging and discharging method includes the following steps: S10: Place the solid-state battery cell into the inner cavity of the main body 1 accordingly; Specifically, the bracket 6 is located outside the main body 1, and the solid-state battery cells are correspondingly placed in the limiting part of the bracket 6, so that the tabs of each battery cell (including its positive tab and negative tab) are electrically connected to the corresponding connecting part on the bracket 6; then, the bracket 6 equipped with the solid-state battery cells is placed in the inner cavity.

[0047] S20: Connect the charging and discharging device 52 to the solid-state battery cell accordingly; Specifically, the position of the plug 11 is adjusted by the second driving member 22, and the plug 11 is driven to connect with the opening of the inner cavity by the first driving member 21, so that the plug on the plug 11 is connected to the socket on the bracket 6, thus realizing the electrical connection between the solid-state battery cell and the charging and discharging device 52.

[0048] S30: Adjust the inner cavity to form an isostatic pressure state; Specifically, liquid medium is filled into the inner cavity through the low-pressure pipeline 31, and the low-pressure pipeline 31 is closed after the inner cavity is filled with liquid medium.

[0049] S40: The pressure in the inner cavity is increased to the target value by the pressurizing device and maintained at that pressure; Specifically, a pressurizing medium is filled into the inner cavity through the high-pressure pipeline 32 so that the pressure in the inner cavity increases to the target pressure and is maintained.

[0050] S50: Adjust the temperature of the inner cavity using the temperature control device 41; Specifically, depending on the actual situation, such as ambient temperature, a cooling medium or a high-temperature medium is introduced into the temperature-regulating cavity to adjust the temperature of the cavity to the target temperature and maintain it.

[0051] S60: The solid-state battery cell is charged and discharged using the charging and discharging device 52; S70: Collect the solid-state battery cell after it has completed charging and discharging; Specifically, the high-pressure line 32 is closed and the low-pressure line 31 is opened to discharge the medium in the inner cavity; then the plug 11 is separated from the opening of the inner cavity, so that the support 6 can be removed from the inner cavity. Finally, it should be noted that the above-described embodiments are merely specific implementations of this application, used to illustrate the technical solutions of this application, and not to limit them. The protection scope of this application is not limited thereto. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art can still modify or easily conceive of changes to the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features, within the technical scope disclosed in this application. Such modifications, changes, or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be covered within the protection scope of this application. Therefore, the protection scope of this application should be defined by the protection scope of the claims.

Claims

1. A solid-state battery cell charging and discharging device, characterized in that, The solid-state battery cell charging and discharging equipment includes: The main body has an inner cavity for placing solid-state battery cells, the inner cavity being capable of being filled with a liquid medium to form an isostatic pressure state; the inner cavity is also connected to a pressurization device; A charging and discharging device is detachably connected to the solid-state battery cell. A temperature control device is connected to the main body to adjust the temperature of the inner cavity.

2. The solid-state battery cell charging and discharging device according to claim 1, characterized in that, The inner cavity extends through the end face of the main body along a first direction to form a corresponding opening on the end face of the main body; the opening is detachably connected to a corresponding plug. When the plug is connected to the opening, the inner cavity is formed into a relatively sealed cavity; When the plug separates from the opening, the inner cavity communicates with the external space.

3. The solid-state battery cell charging and discharging device according to claim 2, characterized in that, The plug is connected to a first driving member, and the driving end of the first driving member can reciprocate along the first direction to drive the plug to connect or separate from the opening. The solid-state battery cell charging and discharging device also includes a guide rail extending along a second direction. The first driving member is connected to a slider that is slidably connected to the guide rail. When the plug separates from the opening, the plug can move synchronously with the first driving member along the second direction.

4. The solid-state battery cell charging and discharging device according to claim 2, characterized in that, The plug has a first wire harness inside; the first end of the first wire harness is integrated into the inner end face of the plug and forms a plug; the second end of the first wire harness is located in the charging and discharging device.

5. The solid-state battery cell charging and discharging device according to claim 4, characterized in that, The solid-state battery cell charging and discharging device also includes a bracket detachably connected to the main body, the bracket being used to support the solid-state battery cell.

6. The solid-state battery cell charging and discharging device according to claim 5, characterized in that, The bracket is formed as a frame structure, and the bracket has multiple limiting parts, each of which corresponds to a solid-state battery cell. The bracket also has a connecting portion, and when the solid-state battery cell is placed in the corresponding limiting portion, the tab of the solid-state battery cell is electrically connected to the connecting portion.

7. The solid-state battery cell charging and discharging device according to claim 6, characterized in that, The bracket has multiple second wire harnesses inside, with the first end of each second wire harness extending to the connecting portion to make an electrical connection with the corresponding tab; the second end of each second wire harness is integrated into the outer side of the bracket and forms a socket corresponding to the plug. When the plug is connected to the opening, the plug is inserted into the socket.

8. The solid-state battery cell charging and discharging device according to claim 2, characterized in that, The inner cavity is connected to a low-pressure pipeline and a high-pressure pipeline; the liquid medium can fill the inner cavity through the low-pressure pipeline to form the isostatic pressure state of the inner cavity; the pressurizing medium in the pressurizing device can enter the inner cavity through the high-pressure pipeline to increase or keep the pressure of the inner cavity constant.

9. The solid-state battery cell charging and discharging device according to claim 2, characterized in that, The main body also forms a temperature-regulating cavity covering the outer part of the inner cavity, and the temperature-regulating cavity is connected to the temperature control device through a temperature-regulating pipeline; the temperature control device includes a cooling source and a heating source.

10. A method for charging and discharging a solid-state battery cell, applied to the solid-state battery cell charging and discharging device as described in any one of claims 1 to 9, characterized in that, The solid-state battery cell charging and discharging method includes the following steps: S10: Place the solid-state battery cell into the inner cavity of the main body accordingly; S20: Connect the charging and discharging device to the solid-state battery cell accordingly; S30: Adjust the inner cavity to form an isostatic pressure state; S40: The pressure in the inner cavity is increased to the target value by the pressurizing device and maintained at that pressure; S50: Adjust the temperature of the inner cavity using the temperature control device; S60: Charge and discharge the solid-state battery cell using the charging and discharging device; S70: Collect the solid-state battery cell after it has been charged and discharged.

Images