Battery pressurizing device and battery production system

Abstract

The utility model provides a battery pressurizing device and a battery production system, and belongs to the technical field of batteries. The battery pressurizing device comprises a first pressurizing part, a second pressurizing part and a driving mechanism, the first pressurizing part is provided with a first containing cavity for containing liquid and a first pressure port communicated with the first containing cavity, and the first pressure port is provided with a first elastic film for sealing the first containing cavity. The second pressurizing part is provided with a second containing cavity for containing liquid and a second pressure port communicated with the second containing cavity, and the second pressure port is provided with a second elastic film for sealing the second containing cavity. And the driving mechanism is used for switching the first pressure port and the second pressure port between a first state in which the first pressure port and the second pressure port are close to each other and a second state in which the first pressure port and the second pressure port are separated. Wherein in the first state, the first elastic film and the second elastic film are attached to the surface of the battery and apply pressure to the battery. Pollution of liquid to the battery can be reduced, and the efficiency of the all-solid-state battery isostatic pressing process is improved.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a battery pressurizing device and a battery production system. Background Art

[0002] An all-solid-state battery is a battery that uses solid electrodes and solid electrolytes. Compared to lithium-ion batteries, all-solid-state batteries have the advantage of having higher energy density. Isostatic pressing is one of the process steps for preparing all-solid-state batteries. The principle is to apply high voltage evenly to the all-solid-state battery, thereby compacting the all-solid-state battery so that the particles in the solid electrolyte can fully contact each other, and between the particles and the solid electrode, to improve the efficiency of ion and electron transmission. The traditional isostatic pressing method is less efficient. Utility Model Content

[0003] The present application aims to solve at least one of the technical problems existing in the background technology. To this end, one purpose of the present application is to provide a battery pressurizing device and a battery production system to improve the isostatic pressing efficiency of all-solid-state batteries.

[0004] An embodiment of the first aspect of the present application provides a battery pressurizing device, including a first pressurizing part, a second pressurizing part and a driving mechanism. The first pressurizing part has a first accommodating chamber for holding liquid, and a first pressure port connected to the first accommodating chamber, and the first pressure port is provided with a first elastic membrane that closes the first accommodating chamber. The second pressurizing part has a second accommodating chamber for holding liquid, and a second pressure port connected to the second accommodating chamber, and the second pressure port is provided with a second elastic membrane that closes the second accommodating chamber. The driving mechanism is connected to at least one of the first pressurizing part and the second pressurizing part, and the driving mechanism is used to realize the switching of the first pressure port and the second pressure port between a first state in which they are close to each other and a second state in which they are separated from each other. In the first state, the first elastic membrane and the second elastic membrane are attached to the surface of the battery and apply pressure to the battery.

[0005] In the technical solution of the embodiment of the present application, the pressure of the liquid is applied to the surface of the battery through the first elastic membrane and the second elastic membrane. The first elastic membrane and the second elastic membrane can isolate the battery from the liquid, thereby overcoming the pollution problem caused by the contact between the battery and the liquid. At the same time, the first elastic membrane and the second elastic membrane can produce adaptive deformation under the pressure of the liquid, so as to fully contact the surface of the battery, and then can evenly apply pressure to the surface of the battery. Compared with the isostatic pressing method of packaging the all-solid-state battery and placing it in an isostatic cylinder, the battery pressurizing device of the present application can complete the isostatic pressing process without packaging the all-solid-state battery, which simplifies the process steps, and the all-solid-state battery will not contact the liquid, which improves the efficiency of the isostatic pressing process of the all-solid-state battery.

[0006] In some embodiments, the battery pressurizing device further comprises a pressure regulating mechanism, which is in fluid communication with at least one of the first accommodating chamber and the second accommodating chamber. The pressure of the liquid is controlled by setting the pressure regulating mechanism, thereby controlling the pressure applied to the battery surface.

[0007] In some embodiments, the first pressurizing part and the second pressurizing part are stacked in the vertical direction, and the first pressurizing part is located above the second pressurizing part in the vertical direction, so that the second elastic membrane of the second pressurizing part can support the battery in the vertical direction to cooperate with the first elastic membrane to pressurize the battery.

[0008] In some embodiments, the driving mechanism is connected to one of the first pressurizing part and the second pressurizing part, and the pressure regulating mechanism is connected to the receiving chamber of the other of the first pressurizing part and the second pressurizing part. By connecting the pressure regulating mechanism to the relatively fixed first pressurizing part or the second pressurizing part, the pressure regulating mechanism can stably and reliably pressurize the liquid in the corresponding receiving chamber.

[0009] In some embodiments, the pressure regulating mechanism includes a connecting tube, one end of which is connected to the first accommodating chamber, and the other end of which is connected to the second accommodating chamber, so that the battery is evenly stressed.

[0010] In some embodiments, the end face of the first pressure port is parallel to the end face of the second pressure port, and the orthographic projection of the first pressure port on the projection plane coincides with the orthographic projection of the second pressure port on the projection plane; wherein the projection plane is parallel to the end face of the first pressure port. The sealing performance of the connection between the first pressure port and the second pressure port is improved, thereby providing a certain degree of protection for the first elastic membrane and the second elastic membrane.

[0011] In some embodiments, the pool pressurizing device further comprises a buffer mechanism, which is arranged on the side of the first pressure port facing the second pressure port, or the buffer mechanism is arranged on the side of the second pressure port facing the first pressure port, so as to reduce the rigid collision between the first pressure port and the second pressure port.

[0012] In some embodiments, the buffer mechanism is configured as an elastic pad, and in the first state, the first pressure port is sealed and connected to the second pressure port through the elastic pad, thereby protecting the first elastic membrane and the second elastic membrane, so that the first elastic membrane and the second elastic membrane can withstand a larger pressure in the isostatic pressing process.

[0013] In some embodiments, the first elastic membrane and the second elastic membrane are configured as silicone rubber membranes, so that the first elastic membrane and the second elastic membrane can produce adaptive deformation and fit on the surface of the battery when subjected to liquid pressure, thereby applying pressure evenly to the surface of the battery.

[0014] In some embodiments, in the first state, the pressure in the first accommodation cavity and the second accommodation cavity is greater than or equal to 2 MPa and less than or equal to 100 MPa. Within this pressure range, it is suitable for clamping the battery.

[0015] In some embodiments, in the first state, the pressure in the first accommodating chamber and the second accommodating chamber is greater than 100 MPa and less than or equal to 600 MPa. Within this pressure range, it is suitable for performing an isostatic pressing process on the all-solid-state battery.

[0016] An embodiment of the second aspect of the present application provides a battery production system, which includes the battery pressurizing device in the above embodiment.

[0017] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In the accompanying drawings, unless otherwise specified, the same reference numerals throughout the multiple drawings represent the same or similar parts or elements. These drawings are not necessarily drawn to scale. It should be understood that these drawings only depict some embodiments disclosed in the present application and should not be regarded as limiting the scope of the present application.

[0019] Figure 1 This is one of the structural schematic diagrams of the battery pressurizing device in some embodiments of the present application in the first state;

[0020] Figure 2 This is a second structural schematic diagram of the battery pressurizing device in the first state in some embodiments of the present application;

[0021] Figure 3 This is a schematic structural diagram of a battery pressurizing device in a second state according to some embodiments of the present application;

[0022] Figure 4 This is the third structural schematic diagram of the battery pressurizing device in the first state according to some embodiments of the present application.

[0023] Description of reference numerals:

[0024] 100. Battery pressurizing device;

[0025] 10. First pressurizing part; 11. First accommodating chamber; 12. First pressure port; 13. First elastic membrane;

[0026] 20. Second pressurizing part; 21. Second accommodating chamber; 22. Second pressure port; 23. Second elastic membrane;

[0027] 30. Driving mechanism;

[0028] 40. Pressure regulating mechanism; 41. Connecting pipe;

[0029] 50. Bracket;

[0030] 60. Buffer mechanism;

[0031] 200. Battery;

[0032] F. Vertical direction. DETAILED DESCRIPTION

[0033] The following embodiments of the technical solution of the present application will be described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0035] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0036] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0037] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0038] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0039] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present application.

[0040] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0041] At present, judging from the development of the market situation, the application of batteries is becoming more and more extensive. Batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars, as well as aerospace and other fields. With the continuous expansion of battery application fields, its market demand is also constantly expanding.

[0042] All-solid-state batteries are batteries that use solid electrodes and solid electrolytes. Compared with lithium-ion batteries, their advantage is that they have higher energy density. Isostatic pressing is one of the process steps for preparing all-solid-state batteries. Its principle is to apply high voltage evenly to the all-solid-state battery, thereby compacting the all-solid-state battery so that the particles in the solid electrolyte can fully contact each other, and between the particles and the solid electrode, so as to improve the efficiency of ion and electron transmission.

[0043] The traditional isostatic pressing method is to package the all-solid-state battery and place it in an isostatic cylinder, then fill the isostatic cylinder with high-pressure hydraulic oil, and use the pressure of the hydraulic oil to compact the all-solid-state battery to increase the degree of densification. In this isostatic pressing method, the all-solid-state battery will be in direct contact with the hydraulic oil, and there is a risk of contamination of the all-solid-state battery. After the isostatic pressing is completed, the all-solid-state battery needs to be packaged again, and the entire process is inefficient.

[0044] Based on the above considerations, in order to solve the problem of low isostatic pressing efficiency of all-solid-state batteries, the present application provides a battery pressurizing device and a battery production system, wherein the battery pressurizing device includes a first pressurizing part, a second pressurizing part and a driving mechanism. The first pressurizing part has a first accommodating chamber for holding liquid, and a first pressure port connected to the first accommodating chamber, and the first pressure port is provided with a first elastic membrane for closing the first accommodating chamber. The second pressurizing part has a second accommodating chamber for holding liquid, and a second pressure port connected to the second accommodating chamber, and the second pressure port is provided with a second elastic membrane for closing the second accommodating chamber. The driving mechanism is connected to at least one of the first pressurizing part and the second pressurizing part, and the driving mechanism is used to realize the switching between the first state in which the first pressure port and the second pressure port are close to each other and the second state in which they are separated from each other. In the first state, the first elastic membrane and the second elastic membrane are attached to the surface of the battery and apply pressure to the battery.

[0045] The pressure of the liquid is applied to the surface of the battery through the first elastic membrane and the second elastic membrane. The first elastic membrane and the second elastic membrane can isolate the battery from the liquid, thereby overcoming the pollution problem caused by the contact between the battery and the liquid. At the same time, the first elastic membrane and the second elastic membrane can produce adaptive deformation under the pressure of the liquid, so as to fully contact the surface of the battery, and then can evenly apply pressure to the surface of the battery. Compared with the isostatic pressing method of packaging the all-solid-state battery and placing it in an isostatic cylinder, the battery pressurizing device of the present application can complete the isostatic pressing process without packaging the all-solid-state battery, which simplifies the process steps, and the all-solid-state battery will not contact the liquid, thereby improving the efficiency of the isostatic pressing process of the all-solid-state battery.

[0046] The battery pressurizing device disclosed in the embodiment of the present application can be used for, but not limited to, the isostatic pressing process of all-solid-state batteries, and can also be used as a fixture for battery testing. The battery pressurizing device disclosed in the present application can be used to form a battery production system, which is conducive to improving the efficiency of the isostatic pressing process of all-solid-state batteries.

[0047] Combination Figures 1 to 3 As shown, Figure 1 This is one of the structural schematic diagrams of the battery pressurizing device in some embodiments of the present application in the first state; Figure 2 This is a second structural schematic diagram of the battery pressurizing device in the first state in some embodiments of the present application; Figure 3 This is a schematic structural diagram of a battery pressurizing device in a second state according to some embodiments of the present application.

[0048] The embodiment of the present application provides a battery pressurizing device 100, comprising a first pressurizing part 10, a second pressurizing part 20 and a driving mechanism 30. The first pressurizing part 10 has a first accommodating chamber 11 for containing liquid, and a first pressure port 12 connected to the first accommodating chamber 11, and the first pressure port 12 is provided with a first elastic membrane 13 for closing the first accommodating chamber 11. The second pressurizing part 20 has a second accommodating chamber 21 for containing liquid, and a second pressure port 22 connected to the second accommodating chamber 21, and the second pressure port 22 is provided with a second elastic membrane 23 for closing the second accommodating chamber 21. The driving mechanism 30 is connected to at least one of the first pressurizing part 10 and the second pressurizing part 20, and the driving mechanism 30 is used to realize the switching between the first pressure port 12 and the second pressure port 22 in a first state of being close to each other and a second state of being separated from each other. In the first state, the first elastic membrane 13 and the second elastic membrane 23 are attached to the surface of the battery 200 and apply pressure to the battery 200.

[0049] The first accommodating chamber 11 of the first pressurizing part 10 is used to hold liquid, and the liquid can be hydraulic oil. The pressure is transmitted to the inner surface of the first accommodating chamber 11 and the first elastic membrane 13 of the first pressure port 12 through the liquid. The first elastic membrane 13 is a membrane with a certain elastic deformation ability. The first elastic membrane 13 is relatively weak relative to the inner surface of the first accommodating chamber. After the pressure acts on the first elastic membrane 13, the first elastic membrane 13 can be adaptively deformed, so as to fully fit with the surface of the battery 200, thereby being able to evenly apply pressure to the surface of the battery 200.

[0050] The second accommodating chamber 21 of the second pressurizing part 20 is used to hold liquid, and the liquid may be hydraulic oil. The pressure is transmitted to the inner surface of the second accommodating chamber 21 and the second elastic membrane 23 of the second pressure port 22 through the liquid. The second elastic membrane 23 is a membrane with a certain elastic deformation ability. The second elastic membrane 23 is relatively weak relative to the inner surface of the second accommodating chamber. After the pressure acts on the second elastic membrane 23, the second elastic membrane 23 can deform adaptively, so as to fully fit with the surface of the battery 200, thereby being able to evenly apply pressure to the surface of the battery 200. Among them, the first pressure port 12 and the second pressure port 22 are arranged oppositely, and the number of batteries 200 placed between the first pressure port 12 and the second pressure port 22 can be one, two or more than two. The pressure of the liquid in the first accommodating chamber 11 acting on the first elastic membrane 13 is opposite to the pressure of the liquid in the second accommodating chamber 21 acting on the second elastic membrane 23. Therefore, the two pressures can offset each other to a certain extent, so as to reduce the damage of the first elastic membrane 13 and the second elastic membrane 23 caused by excessive pressure.

[0051] The driving mechanism 30 can be connected to the first pressurizing part 10 alone, can be connected to the second pressurizing part 20 alone, or can be connected to the first pressurizing part 10 and the second pressurizing part 20 at the same time. Under the action of the driving mechanism 30, the first pressure port 12 and the second pressure port 22 can be brought closer or farther away. The driving mechanism 30 can be a hydraulic cylinder.

[0052] The first state refers to the state of the first pressure port 12 and the second pressure port 22 when pressure needs to be applied to the battery 200. In the first state, the first elastic membrane 13 is attached to the first surface of the battery 200, and the second elastic membrane 23 is attached to the second surface opposite to the first surface. At this time, the first state includes two situations.

[0053] In some embodiments, Figure 1 As shown, the driving mechanism 30 drives the first pressurizing part 10 and the second pressurizing part 20 to approach each other, the first elastic membrane 13 is attached to the first surface of the battery 200, the second elastic membrane 23 is attached to the second surface, and there is a certain distance between the first pressure port 12 and the second pressure port 22. At this time, the first elastic membrane 13 and the second elastic membrane 23 apply a small pressure to the battery. In this embodiment, the first pressurizing part 10 and the second pressurizing part 20 can be used as a clamp for clamping the battery 200, so as to facilitate testing of the battery 200.

[0054] In other embodiments, Figure 2 As shown, the driving mechanism drives the first pressurizing part 10 and the second pressurizing part 20 to approach each other until the first pressure port 12 and the second pressure port 22 are in contact, so that the first pressure port 12 and the second pressure port 22 can define a closed space, and the first elastic membrane 13 and the second elastic membrane 23 are located in the space. At this time, the first elastic membrane 13 and the second elastic membrane 23 apply a large pressure to the battery 200, and the space can constrain the deformation of the first elastic membrane 13 and the second elastic membrane 23 to reduce the deformation and damage of the first elastic membrane 13 and the second elastic membrane 23 when the pressure is too large. In this embodiment, the first elastic membrane 13 and the second elastic membrane 23 can withstand a large pressure, and the first pressurizing part 10 and the second pressurizing part 20 can be used in the isostatic pressing process of the all-solid-state battery.

[0055] like Figure 3As shown, the second state refers to the state of the first pressure port 12 and the second pressure port 22 when the battery 200 needs to be placed between the first pressure port 12 and the second pressure port 22 or the battery 200 needs to be taken out from between the first pressure port 12 and the second pressure port 22. In the second state, at least one of the first elastic membrane 13 and the second elastic membrane 23 is separated from the surface of the battery 200, and the first pressure port 12 is completely separated from the second pressure port 22. In addition, in the second state, the distance between the first pressure port 12 and the second pressure port 22 is larger than that in the first state, so that there is enough space between the first pressure port 12 and the second pressure port 22 to facilitate the placement and removal of the battery 200.

[0056] The pressure of the liquid is applied to the surface of the battery 200 through the first elastic membrane 13 and the second elastic membrane 23. The first elastic membrane 13 and the second elastic membrane 23 can isolate the battery 200 from the liquid, thereby overcoming the pollution problem caused by the contact between the battery 200 and the liquid. At the same time, the first elastic membrane 13 and the second elastic membrane 23 can produce adaptive deformation under the pressure of the liquid, so as to fully contact the surface of the battery 200, and then the pressure can be evenly applied to the surface of the battery 200. Compared with the isostatic pressing method of packaging the all-solid-state battery and placing it in an isostatic cylinder, the battery pressurizing device 100 of the present application can complete the isostatic pressing process without packaging the all-solid-state battery, which simplifies the process steps, and the all-solid-state battery will not contact the liquid, thereby improving the efficiency of the isostatic pressing process of the all-solid-state battery.

[0057] Combination Figures 1 to 3 As shown, according to some embodiments of the present application, the battery pressurizing device 100 further includes a pressure regulating mechanism 40 , and the pressure regulating mechanism 40 is fluidically connected to at least one of the first accommodating chamber 11 and the second accommodating chamber 21 .

[0058] The pressure regulating mechanism 40 can be connected to the first accommodating chamber 11 separately to pressurize the liquid in the first accommodating chamber 11 through the pressure regulating mechanism 40, so that the first elastic membrane 13 actively applies pressure to the first surface of the battery 200, and the liquid in the second accommodating chamber 21 cooperates with the second elastic membrane 23 to apply a reaction force to the second surface of the battery 200, thereby completing the pressurization of the battery 200.

[0059] The pressure regulating mechanism 40 can also be connected to the second accommodating chamber 21 separately to pressurize the liquid in the second accommodating chamber 21 through the pressure regulating mechanism 40, so that the second elastic membrane 23 actively applies pressure to the second surface of the battery 200, and the liquid in the first accommodating chamber 11 cooperates with the first elastic membrane 13 to apply a reaction force to the first surface of the battery 200, thereby completing the pressurization of the battery 200.

[0060] The pressure regulating mechanism 40 can also be connected to the first accommodating chamber 11 and the second accommodating chamber 21 at the same time, so as to pressurize the liquid in the first accommodating chamber 11 and the liquid in the second accommodating chamber 21 at the same time through the pressure regulating mechanism 40, so that the first elastic membrane 13 actively applies pressure to the first surface of the battery 200, and the second elastic membrane 23 actively applies pressure to the second surface of the battery 200, thereby completing the pressurization of the battery 200.

[0061] In some embodiments, the pressure regulating mechanism 40 may be a hydraulic pump equipped with a pressure maintaining circuit, so that the pressure regulating mechanism 40 can not only pressurize or depressurize the liquid, but also maintain the pressure of the liquid within a certain range.

[0062] By providing the pressure regulating mechanism 40 to control the pressure of the liquid, the pressure applied to the surface of the battery 200 can be controlled as needed, thereby improving the accuracy of pressurization.

[0063] Combination Figures 1 to 3 As shown, according to some embodiments of the present application, the first pressurizing portion 10 and the second pressurizing portion 20 are stacked along the vertical direction F, and the first pressurizing portion 10 is located above the second pressurizing portion 20 along the vertical direction F.

[0064] The vertical direction F is a direction perpendicular to the plane where the first elastic membrane 13 and the second elastic membrane 23 are located when no pressure is applied. Driven by the driving mechanism 30 , the first pressurizing portion 10 and the second pressurizing portion 20 move relative to each other along the vertical direction F.

[0065] By stacking the first pressurizing part 10 and the second pressurizing part 20 along the vertical direction F, the second elastic membrane 23 of the second pressurizing part 20 can support the battery 200 along the vertical direction F to cooperate with the first elastic membrane 13 to pressurize the battery 200. As a result, there is no need to additionally set up a supporting member for supporting the battery 200 to overcome the problem of interference between the first pressurizing part 10 and the second pressurizing part 20 and the supporting member when they are close to each other.

[0066] Combination Figures 1 to 3 As shown, according to some embodiments of the present application, the driving mechanism 30 is connected to one of the first pressurizing part 10 and the second pressurizing part 20 , and the pressure adjusting mechanism 40 is connected to the accommodating cavity of the other of the first pressurizing part 10 and the second pressurizing part 20 .

[0067] In some embodiments, the driving mechanism 30 can be connected to the first pressurizing part 10, the pressure regulating mechanism 40 can be connected to the second accommodating chamber 21, and the driving mechanism 30 drives the first pressurizing part 10 to move relative to the second pressurizing part 20, and the second pressurizing part 20 is relatively fixed.

[0068] In other embodiments, the driving mechanism 30 can be connected to the second pressurizing part 20, the pressure adjusting mechanism 40 can be connected to the first accommodating chamber 11, the driving mechanism 30 drives the second pressurizing part 20 to move relative to the first pressurizing part 10, the first pressurizing part 10 is relatively fixed, and the first pressurizing part 10 can be fixed by a bracket 50.

[0069] The pressure regulating mechanism 40 is connected to a relatively fixed one of the first pressurizing part 10 and the second pressurizing part 20, and the pressure regulating mechanism 40 and the pipeline connected to the corresponding receiving chamber are also relatively fixed. For isostatic pressing processes with high pressure requirements, the pipeline is usually made of a metal pipe with high strength, and the pressure regulating mechanism 40 is relatively fixed to the pipeline, so that the liquid in the corresponding receiving chamber can be stably and reliably pressurized.

[0070] By connecting the pressure regulating mechanism 40 with the relatively fixed first pressurizing part 10 or the second pressurizing part 20 , the pressure regulating mechanism 40 can stably and reliably pressurize the liquid in the corresponding accommodating chamber.

[0071] like Figure 4 As shown, Figure 4 The third structural diagram of the battery pressurizing device in the first state in some embodiments of the present application. According to some embodiments of the present application, the pressure regulating mechanism 40 includes a connecting tube 41, one end of the connecting tube 41 is connected to the first accommodating chamber 11, and the other end of the connecting tube 41 is connected to the second accommodating chamber 21.

[0072] In some embodiments, the connecting pipe 41 may be a metal bellows, so that the deformation of the metal bellows can adapt to the change in the relative distance between the first pressurizing part 10 and the second pressurizing part 20 when they move relative to each other.

[0073] By providing a connecting tube 41, the pressure regulating mechanism 40 can simultaneously pressurize the liquid in the first accommodating chamber 11 and the liquid in the second accommodating chamber 21, so that the first elastic membrane 13 actively applies pressure to the first surface of the battery 200, and the second elastic membrane 23 actively applies pressure to the second surface of the battery 200. At the same time, under the action of the connecting tube 41, the pressure in the first accommodating chamber 11 and the pressure in the second accommodating chamber 21 can be kept consistent, so that the battery 200 is evenly stressed.

[0074] Combination Figures 1 to 4 As shown, according to some embodiments of the present application, the end face of the first pressure port 12 is parallel to the end face of the second pressure port 22, and the orthographic projection of the first pressure port 12 on the projection plane and the orthographic projection of the second pressure port 22 on the projection plane coincide with each other; wherein, the projection plane is parallel to the end face of the first pressure port 12.

[0075] The end face of the first pressure port 12 is parallel to the end face of the second pressure port 22, and the end face of the first pressure port 12 and the end face of the second pressure port 22 can be fully fitted. The orthographic projection of the first pressure port 12 on the projection plane coincides with the orthographic projection of the second pressure port 22 on the projection plane. In the case where the end face of the first pressure port 12 and the end face of the second pressure port 22 are fitted, the first pressure port 12 and the second pressure port 22 can define a closed space, and the first elastic membrane 13 and the second elastic membrane 23 are located in the space. At this time, the first elastic membrane 13 and the second elastic membrane 23 apply pressure to the battery, and the space can constrain the deformation of the first elastic membrane 13 and the second elastic membrane 23 to reduce the deformation and damage of the first elastic membrane 13 and the second elastic membrane 23 when the pressure is too large.

[0076] By arranging the end face of the first pressure port 12 and the end face of the second pressure port 22 in parallel and with their projections overlapping, the sealing performance of the connection between the first pressure port 12 and the second pressure port 22 is improved, thereby providing a certain degree of protection for the first elastic membrane 13 and the second elastic membrane 23 .

[0077] Combination Figures 1 to 4 As shown, according to some embodiments of the present application, the battery pressurizing device 100 further includes a buffer mechanism 60 , which is disposed on a side of the first pressure port 12 facing the second pressure port 22 , or the buffer mechanism 60 is disposed on a side of the second pressure port 22 facing the first pressure port 12 .

[0078] The buffer mechanism 60 is a component with a certain elasticity so that the first pressure port 12 and the second pressure port 22 can be in flexible contact. When the driving mechanism 30 drives the first pressurizing part 10 and the second pressurizing part 20 to approach each other, the buffer mechanism 60 is used to reduce the rigid collision between the first pressure port 12 and the second pressure port 22. The buffer mechanism 60 can be configured as a spring or an elastic pad.

[0079] The buffer mechanism 60 is provided between the first pressure port 12 and the second pressure port 22 to reduce the rigid collision between the first pressure port 12 and the second pressure port 22 .

[0080] like Figure 2 As shown, according to some embodiments of the present application, the buffer mechanism 60 is configured as an elastic pad, and in a first state, the first pressure port 12 is sealed and connected to the second pressure port 22 via the elastic pad.

[0081] The elastic pad can be a rubber pad, and the first pressure port 12 is sealed and connected to the second pressure port 22 through the elastic pad, so that the first pressure port 12 and the second pressure port 22 can define a closed space, and the first elastic membrane 13 and the second elastic membrane 23 are located in the space. At this time, the first elastic membrane 13 and the second elastic membrane 23 apply pressure to the battery 200. The space can restrain the deformation of the first elastic membrane 13 and the second elastic membrane 23 to reduce the deformation and damage of the first elastic membrane 13 and the second elastic membrane 23 when the pressure is too high, and is suitable for isostatic pressing processes with large pressure requirements.

[0082] The first pressure port 12 and the second pressure port 22 are sealed and connected by the elastic pad, which can protect the first elastic membrane 13 and the second elastic membrane 23 so that the first elastic membrane 13 and the second elastic membrane 23 can withstand the greater pressure in the isostatic pressing process.

[0083] According to some embodiments of the present application, the first elastic membrane 13 and the second elastic membrane 23 are configured as silicone rubber membranes.

[0084] The silicone rubber membrane is a membrane made of silicone rubber, which has a certain elasticity.

[0085] By configuring the first elastic membrane 13 and the second elastic membrane 23 as silicone rubber membranes, the first elastic membrane 13 and the second elastic membrane 23 can be adaptively deformed and adhered to the surface of the battery 200 when subjected to liquid pressure, thereby applying pressure evenly to the surface of the battery 200 .

[0086] According to some embodiments of the present application, in the first state, the pressure inside the first accommodating chamber 11 and the second accommodating chamber 21 is greater than or equal to 2 MPa and less than or equal to 100 MPa.

[0087] The pressure in the first accommodating chamber 11 and the second accommodating chamber 21 can be 2 MPa, 5 MPa, 10 MPa, 30 MPa, 60 MPa or 100 MPa, etc. Within this pressure range, it is suitable for clamping the battery 200.

[0088] In the pressure range of 2 MPa to 100 MPa, the pressure applied to the battery 200 is relatively small, and the first pressurizing part 10 and the second pressurizing part 20 can be used as a clamp for clamping the battery 200 to facilitate testing of the battery 200 .

[0089] According to some embodiments of the present application, in the first state, the pressure inside the first accommodating chamber 11 and the second accommodating chamber 21 is greater than 100 MPa and less than or equal to 600 MPa.

[0090] The pressure in the first accommodating chamber 11 and the second accommodating chamber 21 can be 150 MPa, 200 MPa, 400 MPa or 600 MPa, etc. Within this pressure range, it is suitable for performing an isostatic pressing process on the all-solid-state battery.

[0091] In the pressure range of 100 MPa to 600 MPa, the pressure on the battery 200 is relatively large, and the first pressurizing part 10 and the second pressurizing part 20 can be used in the isostatic pressing process of the all-solid-state battery.

[0092] An embodiment of the second aspect of the present application provides a battery production system, including the battery pressurizing device 100 as in the above embodiment.

[0093] In some embodiments, the battery production system may further include a transfer device, which is used to transfer the battery 200 to between the first pressure port 12 and the second pressure port 22 of the battery pressurizing device 100, and is also used to move the battery 200 out from between the first pressure port 12 and the second pressure port 22. The transfer device may be a fully automated or semi-automated manipulator, a robotic arm, or a robot.

[0094] The battery production system in this embodiment can have all the beneficial effects of the battery pressurizing device 100 in the above-mentioned embodiment, which will not be described in detail here.

[0095] Combine the following Figures 1 to 4 The embodiments of the present application are described in further detail.

[0096] The battery pressurizing device 100 includes a first pressurizing unit 10 , a second pressurizing unit 20 , a driving mechanism 30 , a pressure regulating mechanism 40 , a bracket 50 and a buffer mechanism 60 .

[0097] The first pressurizing part 10 has a first accommodating chamber 11 for containing hydraulic oil, and a first pressure port 12 communicating with the first accommodating chamber 11, and the first pressure port 12 is provided with a first elastic membrane 13 for closing the first accommodating chamber 11. The first accommodating chamber is communicated with the pressure regulating mechanism 40. The first pressurizing part 10 is fixed on the bracket 50.

[0098] The second pressurizing part 20 has a second accommodating chamber 21 for containing hydraulic oil, and a second pressure port 22 communicating with the second accommodating chamber 21, and the second pressure port 22 is provided with a second elastic membrane 23 for closing the second accommodating chamber 21. The second pressurizing part 20 is located below the first pressurizing part 10 along the vertical direction F, and the first pressure port 12 and the second pressure port 22 are arranged opposite to each other.

[0099] The driving mechanism 30 is connected to the second pressurizing part 20, and is used to switch the first pressure port 12 and the second pressure port 22 between a first state in which they are close to each other and a second state in which they are separated from each other. In the first state, the first elastic membrane 13 and the second elastic membrane 23 are attached to the surface of the battery 200 and apply pressure to the battery 200.

[0100] When the battery pressurizing device 100 is used as a battery clamp, the first pressure port 12 and the second pressure port 22 are first switched to the second state, the battery is placed on the second elastic membrane 23, and then the first pressure port 12 and the second pressure port 22 are switched to the first state. Finally, the hydraulic oil in the first accommodating chamber 11 is pressurized through the pressure regulating mechanism 40 and maintained within a certain pressure range, so that the battery is clamped by the first elastic membrane 13 and the second elastic membrane 23, wherein the pressure range of the hydraulic oil in the first accommodating chamber 11 is greater than or equal to 2 MPa and less than or equal to 100 MPa.

[0101] When the battery pressurizing device 100 is used for the isostatic pressing process of the all-solid-state battery, the first pressure port 12 and the second pressure port 22 are first switched to the second state, the all-solid-state battery is placed on the second elastic membrane 23, and then the first pressure port 12 and the second pressure port 22 are switched to the first state. Finally, the hydraulic oil in the first accommodating chamber 11 is pressurized through the pressure regulating mechanism 40 and maintained within a certain pressure range. The first elastic membrane 13 and the second elastic membrane 23 can be fully combined with the surface of the all-solid-state battery under a large pressure, so that the pressure is evenly applied to the surface of the all-solid-state battery, thereby completing the compaction of the all-solid-state battery, wherein the pressure range of the hydraulic oil in the first accommodating chamber 11 is greater than 100 MPa and less than or equal to 600 MPa.

[0102] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A battery pressurizing device, characterized in that: include: A first pressurizing part, comprising a first accommodating chamber for containing liquid, and a first pressure port communicating with the first accommodating chamber, wherein the first pressure port is provided with a first elastic membrane for sealing the first accommodating chamber; A second pressurizing part, comprising a second accommodating chamber for containing liquid, and a second pressure port communicating with the second accommodating chamber, wherein the second pressure port is provided with a second elastic membrane for sealing the second accommodating chamber; a driving mechanism connected to at least one of the first pressurizing part and the second pressurizing part, the driving mechanism being used to switch the first pressure port and the second pressure port between a first state in which the first pressure port and the second pressure port are close to each other and a second state in which the first pressure port and the second pressure port are separated from each other; Wherein, in the first state, the first elastic film and the second elastic film adhere to the surface of the battery and apply pressure to the battery.

2. The battery pressurizing device according to claim 1, characterized in that: The battery pressurizing device further includes a pressure regulating mechanism in fluid communication with at least one of the first accommodating chamber and the second accommodating chamber.

3. The battery pressurizing device according to claim 2, characterized in that: The first pressurizing portion and the second pressurizing portion are stacked in a vertical direction, and the first pressurizing portion is located above the second pressurizing portion in the vertical direction.

4. The battery pressurizing device according to claim 3, characterized in that: The driving mechanism is connected to one of the first pressurizing part and the second pressurizing part, and the pressure adjusting mechanism is communicated with the accommodation chamber of the other of the first pressurizing part and the second pressurizing part.

5. The battery pressurizing device according to claim 2, characterized in that: The pressure regulating mechanism includes a connecting tube, one end of which is connected to the first accommodating chamber, and the other end of which is connected to the second accommodating chamber.

6. The battery pressurizing device according to any one of claims 1 to 5, characterized in that: The end surface of the first pressure port is parallel to the end surface of the second pressure port, and the orthographic projection of the first pressure port on the projection plane coincides with the orthographic projection of the second pressure port on the projection plane; Wherein, the projection plane is parallel to the end surface of the first pressure port.

7. The battery pressurizing device according to claim 6, characterized in that: The battery pressurizing device also includes a buffer mechanism; The buffer mechanism is disposed on a side of the first pressure port facing the second pressure port, or the buffer mechanism is disposed on a side of the second pressure port facing the first pressure port.

8. The battery pressurizing device according to claim 7, characterized in that: The buffer mechanism is configured as an elastic pad; In the first state, the first pressure port is sealed and connected to the second pressure port through the elastic pad.

9. The battery pressurizing device according to any one of claims 1 to 5, characterized in that: The first elastic film and the second elastic film are configured as silicone rubber films.

10. The battery pressurizing device according to any one of claims 1 to 5, characterized in that: In the first state, the pressure in the first accommodating chamber and the second accommodating chamber is greater than or equal to 2 MPa and less than or equal to 100 MPa.

11. The battery pressurizing device according to any one of claims 1 to 5, characterized in that: In the first state, the pressure in the first accommodating chamber and the second accommodating chamber is greater than 100 MPa and less than or equal to 600 MPa.

12. A battery production system, characterized in that: The invention comprises a battery pressurizing device as claimed in any one of claims 1 to 11.

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