Formation system and battery tray

Abstract

The invention relates to the field of battery production, and provides a formation system and a battery tray. The formation system comprises a battery tray and an air supply pipeline. The battery tray includes at least one airbag assembly. The air bag assembly comprises a plurality of elastic air bag structures which are arranged at intervals in the first direction, and a clamping space is formed between every two adjacent air bag structures. The air supply pipeline is communicated with the air bag structures and used for being communicated with an external air source. Based on the structure, when the battery is placed in the clamping space and the battery is formed, the air bag structures on the two opposite sides of the battery can jointly form better pressing, clamping, restraining and constraining effects on the battery between the air bag structures, and an interlayer gap of an electrode assembly of the battery can be reliably inhibited in the battery formation period; therefore, gas generated by battery formation can be prompted to be exhausted from the battery in time, the exhaust effect in the battery formation period can be guaranteed and improved, and the film forming quality of an SEI film, the battery formation effect and the performance of the battery can be guaranteed and improved.

Description

Technical Field

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

[0002] After battery fabrication, the first charge and discharge cycles activate the active materials within the battery and form a solid electrolyte interphase (SEI) film on the surface of the electrode active layer. This process is called battery formation. Gases are generated during formation, which can affect the quality of the SEI film, which in turn affects battery performance. A formation system can be used to facilitate the timely discharge of these gases.

[0003] In some cases, the formation system is equipped with a battery tray to hold the batteries. The tray's clamping plates can clamp and pressurize the batteries to facilitate gas discharge. However, this system often fails to effectively clamp and pressurize the batteries, resulting in poor gas discharge and, consequently, poor SEI film quality and formation results. Summary of the Invention

[0004] The embodiments of the present application provide a formation system and a battery tray, which aim to solve the problem that the existing formation system has poor clamping and pressure effect on the battery, resulting in poor exhaust effect, and causing poor film formation quality of the SEI film and poor formation effect.

[0005] To achieve the above objectives, the technical solutions adopted in the embodiments of the present application are:

[0006] In a first aspect, a formation system is provided, the formation system comprising:

[0007] A battery tray comprising at least one airbag assembly, the airbag assembly comprising a plurality of elastic airbag structures, the plurality of airbag structures being spaced apart along a first direction, and forming a clamping space for loading batteries between two adjacent airbag structures;

[0008] The air supply pipeline is connected to each air bag structure and is used to communicate with an external air source.

[0009] The formation system provided in the embodiment of the present application can load batteries through a battery tray, and in particular can load batteries through the clamping space between two adjacent airbag structures of the airbag assembly. The external gas source and each airbag structure can also be connected through an air supply channel to transmit gas between the external gas source and each airbag structure, thereby inflating or deflating the airbag structure. Based on this, when the battery is placed in the clamping space and the battery is formed, the airbag structures on the opposite sides of the battery can adjust the internal air pressure of the airbag structure by inflation or deflating, so that the airbag structure has a certain internal air pressure to jointly press and apply pressure to the battery therebetween. During this period, based on the elasticity of the airbag structure itself, the surface of the airbag structure can be tightly elastically pressed against the entire side of the battery, so that the pressure of the airbag structure on the battery can be relatively evenly distributed on the entire side of the battery, so that the battery and the electrode assembly therein can be subjected to uniform pressure. Therefore, the airbag structures on the opposite sides of the battery can jointly form a better pressing, clamping, restraining and binding effect on the battery therebetween, and can reliably suppress the interlayer gap of the electrode assembly inside the battery during the battery formation, thereby effectively promoting the gas generated during the battery formation to be discharged from the battery in time, effectively ensuring and improving the exhaust effect during the battery formation, and effectively reducing the risk of gas blocking the active ion channel and causing black spots, lithium deposition and other problems on the electrode, thereby ensuring and improving the film formation quality of the SEI film, the battery formation effect, and the battery's electrochemical stability, cycle life, self-discharge and other performance.

[0010] Moreover, since the batteries are placed in the clamping spaces accordingly, during the battery formation process, the airbag structures on the opposite sides of the battery can form a certain limiting effect on the battery therebetween, thereby helping to ensure and improve the position stability of the battery during the formation process, and reducing the risk of probe displacement of the formation machine due to changes in the battery position, thereby improving the formation success rate and excellent formation rate, and reducing the formation rework rate.

[0011] Furthermore, due to the elasticity of the airbag structure itself, when the airbag structure presses and applies pressure to the battery, it is not easy to crush the battery housing and the battery.

[0012] Furthermore, the pressurization method of the formation system is simple and convenient, and requires fewer devices, thereby reducing costs and the space required for the entire formation system.

[0013] In some embodiments, the formation system further includes a regulating valve provided on the gas supply pipeline, and the regulating valve is used to adjust the pressure and / or flow of the gas transmitted by the gas supply pipeline.

[0014] By adopting the above-described solution, the pressure and / or flow of the gas transmitted by the gas supply pipeline can be quickly and easily adjusted via the regulating valve during the battery formation process, thereby conveniently, quickly, and reliably adjusting the inflation or deflation amplitude of the airbag structure. This allows for convenient, quick, and reliable adjustment of the internal air pressure of the airbag structure, and the pressure and restraint force exerted by each set of two adjacent airbag structures on the battery therebetween. In particular, during the battery formation process, as the electrode assembly expands, the required restraint force of the battery increases. Based on the configuration of this embodiment, the internal air pressure of the airbag structure can be controlled by the regulating valve to adapt to the increase in pressure as the electrode assembly expands, thereby enhancing the pressure and restraint force exerted by each set of two adjacent airbag structures on the battery therebetween. Therefore, based on the regulating valve, the internal air pressure of the airbag structure and the pressure of the airbag structure on the battery can be controlled, thereby ensuring and improving the restraint effect of the formation system on the battery during battery formation, ensuring and improving the exhaust effect during battery formation, and then improving the battery formation effect and battery formation quality rate, saving the time of the formation process, reducing the formation rework rate, and improving the film formation quality of the SEI film and the performance of the battery.

[0015] In some embodiments, the formation system further includes a controller connected to the regulating valve, and the controller is configured to control the regulating valve.

[0016] By adopting the above scheme, it is convenient to automatically control the regulating valve through the controller during the battery formation process, so that the regulating valve can quickly, automatically and controllably adjust the pressure and / or flow of the gas transmitted by the gas supply pipeline, thereby quickly, reliably, automatically and controllably adjusting the internal air pressure of the airbag structure and the pressure of the airbag structure on the battery, thereby ensuring and improving the restraint effect of the formation system on the battery during the battery formation, ensuring and improving the exhaust effect during the battery formation, and further improving the formation effect, formation quality and formation consistency, saving the time of the formation process, reducing the formation rework rate, and improving the film formation quality of the SEI film and the performance of the battery.

[0017] In some embodiments, the formation system further includes an air pressure detector provided on the gas supply pipeline. The air pressure detector is located between the regulating valve and the battery tray. The air pressure detector is used to detect the pressure of the gas transmitted by the gas supply pipeline.

[0018] By adopting the above scheme, during the battery formation process, the air pressure detector can be used in the air supply pipe portion between the regulating valve and the battery tray to detect the pressure of the gas transmitted by the air supply pipe in real time, so that the regulating valve can be adaptively controlled manually or automatically for adjustment according to the detection result of the air pressure detector, so that the regulating valve can quickly, controllably and accurately adjust the pressure and / or flow of the gas transmitted by the air supply pipe as needed, so that during the battery formation process, the internal air pressure of the airbag structure and the pressure of the airbag structure on the battery can be quickly, controllably, timely and accurately adjusted, thereby ensuring and improving the restraint effect of the formation system on the battery during the battery formation period, ensuring and improving the exhaust effect during the battery formation period, and thus improving the formation effect, formation quality rate and formation consistency, saving the time of the formation process, reducing the formation rework rate, and improving the film formation quality of the SEI film and the performance of the battery.

[0019] In some embodiments, the air pressure detector is in communication with the controller, and the controller is configured to control the regulating valve according to detection data of the air pressure detector.

[0020] By adopting the above scheme, the pressure of the gas transmitted by the gas supply pipeline can be detected in real time by a pressure detector, and the controller can quickly, promptly, and automatically control the regulating valve to adjust the pressure and / or flow of the gas transmitted by the gas supply pipeline based on the detection data of the pressure detector, so that the regulating valve can quickly, promptly, controllably, and accurately adjust the pressure and / or flow of the gas transmitted by the gas supply pipeline. In particular, when the pressure of the gas decreases due to reasons such as gas leakage, the controller can promptly control the regulating valve to adjust the pressure and / or flow of the gas transmitted by the gas supply pipeline based on the detection data of the pressure detector, thereby promptly increasing the pressure and / or flow of the gas transmitted by the gas supply pipeline and achieving pressure foolproofing. In this way, the internal air pressure of the airbag structure and the pressure of the airbag structure on the battery can be monitored in real time during the battery formation process, and the pressure of the airbag structure on the battery can be quickly, promptly, controllably, and accurately adjusted. This can ensure and improve the restraint effect of the formation system on the battery during the battery formation period, ensure and improve the exhaust effect during the battery formation period, and further improve the formation effect, formation quality rate, and formation consistency, save the time spent in the formation process, reduce the formation rework rate, and improve the film quality of the SEI film and the performance of the battery.

[0021] In some embodiments, the formation system further includes a reducer provided on the gas supply pipeline, the reducer being located between the regulating valve and the battery tray, and the reducer being used to reduce the flow rate of the gas transmitted by the gas supply pipeline.

[0022] By adopting the above-mentioned scheme, during the battery formation process, especially during the period when the regulating valve adjusts the pressure and / or flow of the gas transmitted by the gas supply pipeline, the reducer can be used in the gas supply pipeline portion between the regulating valve and the battery tray to reduce the flow rate of the gas transmitted by the gas supply pipeline, so as to buffer the amplitude of the air pressure change, reduce the sudden change in air pressure, and reduce the impact of the sudden change in air pressure on the airbag structure, thereby facilitating the precise adjustment of the internal air pressure of the airbag structure and the pressure of the airbag structure on the battery, and helping to protect and extend the service life of the airbag structure, the battery tray and the formation system.

[0023] In some embodiments, the regulating valve includes at least one of a solenoid valve and a proportional valve.

[0024] By adopting the above solution, the regulating valve can be a solenoid valve or a proportional valve, so that the regulating valve can accurately adjust the flow rate of gas transmitted by the gas supply pipeline, thereby effectively improving the convenience and accuracy of adjusting the internal air pressure of the airbag structure and the pressure of the airbag structure on the battery.

[0025] In some embodiments, the formation system further includes a switch valve provided on the gas supply pipeline, and the switch valve is used to open or close the gas supply pipeline.

[0026] By adopting the above solution, when the formation system is in operation, the gas supply pipeline can be opened by the switch valve to allow the airbag structure to be inflated or deflated. Conversely, when the formation system is idle, the gas supply pipeline can be closed by the switch valve to reduce the loss of gas from the external gas source.

[0027] In some embodiments, each air bag structure is connected in parallel to an air supply pipe.

[0028] By adopting this solution, each airbag structure is connected in parallel to an air supply pipeline, allowing the pipeline to inflate or deflate each airbag structure simultaneously, ensuring that the internal air pressure of each airbag structure increases or decreases uniformly, resulting in a substantially isobaric internal pressure. This ensures that the pressure and restraint forces exerted by two adjacent airbag structures in each group on the battery between them are essentially consistent, thereby ensuring and improving the formation consistency of each battery in the formation system, enhancing the battery formation effect and quality rate, reducing the time spent in the formation process, and reducing the rework rate.

[0029] In some embodiments, each air bag structure is connected in series to an air supply conduit.

[0030] By adopting this solution, each airbag structure is connected in series to an air supply pipeline, allowing the pipeline to inflate or deflate each airbag structure simultaneously, ensuring that the internal air pressure of each airbag structure increases or decreases with substantially the same amplitude, resulting in a substantially isobaric internal pressure. This ensures that the pressure and restraint forces exerted by two adjacent airbag structures in each group on the battery between them are substantially consistent, thereby ensuring and improving the formation consistency of each battery in the formation system, enhancing the battery formation effect and quality rate, reducing the time spent in the formation process, and reducing the formation rework rate.

[0031] In some embodiments, the battery tray further includes a base, and the airbag assembly is mounted on the base.

[0032] By adopting the above solution, the battery tray can install the airbag assembly through the base to support the airbag assembly and stabilize the installation position and installation state of the airbag assembly, thereby ensuring that the airbag assembly can reliably perform the functions of pressure and restraint, which can help to ensure and improve the performance and service life of the battery tray.

[0033] In some embodiments, the battery tray further includes a fixing assembly, which is disposed corresponding to the airbag assembly and is used to stabilize the airbag structures of the airbag assembly.

[0034] By adopting the above solution, the battery tray can be installed with the airbag assembly limited by the fixing component, especially stabilizing the relative position and relative state of each airbag structure of the airbag assembly, thereby ensuring that each airbag structure of the airbag assembly can reliably exert pressure, restraint and other effects on the battery respectively, which can help to ensure and improve the structural reliability and use reliability of the battery tray.

[0035] In some embodiments, the fixing assembly includes two fixing members and at least one limiting member, the two fixing members are spaced apart along the first direction, and the limiting member extends along the first direction and is connected to the two fixing members;

[0036] Each airbag structure of the airbag assembly is arranged between the two fixing members and is connected to the limiting member.

[0037] By adopting the above solution, the fixing assembly can enclose an installation space by means of two fixing members spaced apart along the first direction x, and a stopper extending along the first direction x and connected to the two fixing members, thereby limiting the installation of the airbag assembly. The fixing assembly can also reliably stabilize the relative positions and states of the airbag structures of the airbag assembly by connecting the stopper to each airbag structure. Thus, the fixing assembly can ensure that the relative positions and states of the airbag structures of the airbag assembly are stabilized, thereby ensuring that each airbag structure of the airbag assembly can reliably exert pressure on and restrain the battery, thereby ensuring and improving the structural and operational reliability of the battery tray.

[0038] By adopting the above scheme, when the battery is placed in the corresponding clamping space, the limiting member can form a certain limiting effect on the battery, which can be beneficial to ensure and improve the position stability of the battery during the formation process, and can reduce the risk of the probe of the formation machine being offset due to changes in the battery position, thereby improving the formation success rate and the formation quality rate, and reducing the formation rework rate.

[0039] In some embodiments, the airbag structure includes a frame, and an airbag mounted within the frame.

[0040] By adopting this solution, the airbag structure can be mounted and supported by the frame, and the frame facilitates the overall mounting and securing of the airbag structure. The airbag structure also reliably exerts pressure and restraint on the battery through inflation and deflation, while not easily crushing the battery housing or battery. This ensures and enhances the structural and operational reliability of the airbag structure.

[0041] In some embodiments, the airbag is connected to the frame by at least one of adhesion, compression, and vulcanization.

[0042] By adopting the above solution, the airbag can be connected and fixed to the frame by at least one of adhesion, pressing, and vulcanization. Based on this, the connection stability and sealing between the airbag and the frame can be guaranteed and improved, thereby ensuring and improving the structural reliability and use reliability of the airbag structure, and reducing the risk of the airbag falling off.

[0043] In some embodiments, the frame comprises at least one of aluminum, stainless steel, and hard plastic.

[0044] By adopting the above solution, the rigidity and structural strength of the frame can be guaranteed and improved, thereby guaranteeing and improving the supporting effect of the frame on the airbag, and guaranteeing and improving the structural reliability and service life of the airbag structure.

[0045] In some embodiments, the airbag assembly further includes a mounting bracket, which is disposed correspondingly to the clamping space. The mounting bracket is provided with a mounting groove, which extends along the first direction and passes through the mounting bracket.

[0046] By adopting the above solution, a mounting bracket can be provided in the clamping space so as to limit the installation of the battery through the mounting slot of the mounting bracket. Based on this, the airbag structures on opposite sides of the mounting slot can reliably exert pressure and restraint effects on the battery in the mounting slot. Moreover, during the battery formation process, the mounting bracket can form a reliable limiting effect on the battery, thereby ensuring and improving the positional stability of the battery during the formation process, reducing the risk of probe displacement of the formation machine due to changes in the battery position, thereby improving the formation success rate and formation quality rate, and reducing the formation rework rate.

[0047] In some embodiments, in the first direction, a width of the clamping space is 1 mm to 2 mm greater than a thickness of an electrode assembly of a battery loaded in the clamping space.

[0048] By adopting the above scheme, by making the width of the clamping space in the first direction slightly larger than the thickness of the electrode assembly of the battery installed in the corresponding clamping space in the first direction by 1mm to 2mm, it is not only convenient for the airbag structures on the opposite sides of the clamping space to reliably exert pressure, restraint and other effects on the batteries in the clamping space, but also convenient for taking and installing the batteries in the clamping space, thereby improving the convenience of taking the batteries out of the clamping space.

[0049] In a second aspect, a battery tray is provided, which includes at least one airbag assembly, the airbag assembly including a plurality of elastic airbag structures, the plurality of airbag structures being arranged at intervals along a first direction, and forming a clamping space for loading batteries between two adjacent airbag structures.

[0050] By adopting the above solution, the battery tray can be loaded with batteries through the clamping space between two adjacent airbag structures of the airbag assembly, which is convenient for taking, placing, storing and even transporting the batteries. When the battery tray is used in a system such as a formation system, the battery tray can also cooperate with the limited loading of batteries to facilitate the formation system and other systems to perform corresponding operations on the batteries. In particular, when the interior of the airbag structure is filled with some gas, the airbag structures on the opposite sides of the battery can also jointly press and apply pressure to the battery therebetween, so as to form a better pressing, clamping, restraining and binding effect on the battery, and form a certain limiting effect on the battery, thereby facilitating the operation of the formation system and other systems on the battery, which can help improve the operation effect of the formation system and other systems on the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] In order to clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments or descriptions of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0052] Figure 1 An exploded schematic diagram of a battery provided in some embodiments of the present application;

[0053] Figure 2 A schematic diagram of the structure of an electrode assembly provided in some embodiments of the present application;

[0054] Figure 3 for Figure 2 A partial schematic diagram of the provided electrode assembly;

[0055] Figure 4 A schematic diagram of the structure of a formation system provided in some embodiments of the present application, wherein each airbag structure is connected in parallel to an air supply pipeline;

[0056] Figure 5 Schematic diagram of the structure of the formation system provided in some other embodiments of the present application, wherein each air bag structure is connected in series to the air supply pipeline;

[0057] Figure 6 Schematic diagram of an exploded view of the airbag structure, mounting bracket and battery provided in some embodiments of the present application.

[0058] Among them, the reference numerals in the figures are:

[0059] 10-battery, 11-electrode assembly, 111-positive electrode sheet, 1111-positive electrode current collector, 1112-positive electrode active layer, 1113-positive electrode tab; 112-negative electrode sheet, 1121-negative electrode current collector, 1122-negative electrode active layer, 1123-negative electrode tab; 113-diaphragm; 12-housing, 13-end cover, 14-electrode terminal; 20-battery tray, 21-airbag assembly, 211-airbag structure, 2111- Frame, 2112-airbag, 212-clamping space, 213-mounting bracket, 2131-mounting slot; 22-base, 23-fixing assembly, 231-fixing part, 232-limiting part; 30-air supply pipe, 31-main pipe, 32-first branch pipe, 33-second branch pipe; 40-regulating valve; 50-controller; 60-air pressure detector; 70-reducer; 80-switch valve; 90-external air source; x-first direction. DETAILED DESCRIPTION

[0060] In order to make the technical problems, technical solutions and beneficial effects to be solved by this application clear and understandable, the present application is described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0061] In the description of this application, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and 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, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0062] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of such features. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0063] In this application, unless otherwise expressly specified or limited, terms such as "mounted," "connected," "connect," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components or interactions between two components. Those skilled in the art will understand the specific meanings of these terms in this application based on specific circumstances.

[0064] After battery fabrication, a crucial step is the battery formation process. This refers to the initial charge-discharge process after battery fabrication, which activates the active materials within the battery and forms a solid electrolyte interphase (SEI) film (also known as a passivation film) on the surface of the electrode active layer (typically the surface of the negative electrode active layer). The SEI film formed on the electrode active layer prevents redox reactions between the electrode active materials and the electrolyte, thereby ensuring the battery's electrochemical stability, cycle life, and electrical properties such as self-discharge.

[0065] However, during the battery formation process, when the SEI film is generated on the surface of the active layer of the electrode, some gases are generated. These gases are basically insulating gases (such as hydrocarbon gases). If the gas is not discharged in time, the gas will block the active ion channel, causing the active ions to be unable to migrate smoothly to the active layer of the electrode, resulting in black spots, lithium precipitation and other problems on the electrode, which will affect the film formation quality of the SEI film, affect the battery formation effect, and affect the battery's electrochemical stability, cycle life, and electrical properties such as self-discharge. Therefore, during the battery formation process, the gas needs to be discharged from the battery in a timely manner.

[0066] In this regard, related industries usually use a formation system to prompt the gas to be discharged from the battery in a timely manner during the battery formation. In some cases, the formation system will be provided with a battery tray to load the battery. And the formation system can clamp and press the battery through the splint of the battery tray to suppress the interlayer gap (GAP) of the electrode assembly of the battery, thereby prompting the gas generated during the battery formation process to be discharged from the battery. However, the force exerted by the splint will diffuse and offset to the surrounding areas of the battery when acting on the entire side of the battery, resulting in uneven force on the electrode assembly inside the battery, resulting in an uneven electrode interface, which leads to poor clamping and pressure of the battery by the formation system through the splint, resulting in poor exhaust effect, resulting in poor film quality of the SEI film and poor battery formation effect.

[0067] Thus, some embodiments of the present application provide a formation system that can load batteries through a battery tray, and in particular, can load batteries through the clamping space between two adjacent airbag structures of an airbag assembly. An external air source and each airbag structure can also be connected through an air supply channel to transmit gas between the external air source and each airbag structure, thereby inflating or deflating the airbag structure. Based on this, when the battery is placed in the clamping space and the battery is formed, the airbag structures on opposite sides of the battery can adjust the internal air pressure of the airbag structure by inflating or deflating, so that the airbag structures have a certain internal air pressure to jointly press and apply pressure to the battery located therebetween. During this period, based on the elasticity of the airbag structure itself, the surface of the airbag structure can tightly and elastically press against the entire side of the battery, so that the pressure of the airbag structure on the battery can be relatively evenly distributed on the entire side of the battery, so that the battery and the electrode assembly therein can be subjected to uniform pressure. Therefore, the airbag structures on the opposite sides of the battery can jointly form a better pressing, clamping, restraining and binding effect on the battery therebetween, and can reliably suppress the interlayer gap of the electrode assembly inside the battery during the battery formation, thereby effectively promoting the gas generated during the battery formation to be discharged from the battery in time, effectively ensuring and improving the exhaust effect during the battery formation, and effectively reducing the risk of gas blocking the active ion channel and causing black spots, lithium deposition and other problems on the electrode, thereby ensuring and improving the film formation quality of the SEI film, the battery formation effect, and the battery's electrochemical stability, cycle life, self-discharge and other performance.

[0068] The formation system disclosed in the embodiments of the present application can be used to facilitate the timely discharge of gas from a battery during battery formation. The battery can be a lithium-ion secondary battery, a lithium-ion primary battery, a lithium-sulfur battery, a sodium-lithium-ion battery, a sodium-ion battery, or a magnesium-ion battery, among others. The battery can be cylindrical, flat, rectangular, or in other shapes. The battery can be packaged in various ways, such as cylindrical, prismatic, or pouch-shaped.

[0069] In order to illustrate the technical solution provided by this application, a detailed description is given below with reference to specific drawings and embodiments.

[0070] See also Figure 1 , Figure 1 Schematic diagram of an exploded view of a battery 10 provided for some embodiments of the present application. The battery 10 may be a lithium-ion secondary battery, a lithium-ion primary battery, a lithium-sulfur battery, a sodium-lithium-ion battery, a sodium-ion battery, or a magnesium-ion battery, among others. The battery 10 may be cylindrical, flat, rectangular, or in other shapes, among others. The battery 10 may be packaged in different ways to form a cylindrical battery, a square battery, or a soft-pack battery, among others. The battery 10 may be used independently or in combination with other batteries 10 to form a modular structure that can provide higher voltage and capacity, such as a battery module, a battery pack, or a battery pack.

[0071] The battery 10 can be used in electrical devices that use the battery 10 as a power source, or in various energy storage systems that use the battery 10 as an energy storage element. The electrical device may be, but is not limited to, a vehicle, a mobile phone, a portable device, a laptop computer, a ship, a spacecraft, an electric toy, an electric tool, and the like. The vehicle may be a fuel vehicle, a gas vehicle, or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle, or an extended-range vehicle, and the like. The spacecraft includes airplanes, rockets, space shuttles, and spacecraft, and the like. Electric toys include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, and the like. Electric tools include metal cutting electric tools, grinding electric tools, assembly electric tools, and railway electric tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers, and the like.

[0072] The battery 10 includes an electrode assembly 11 , an electrolyte (not shown), a housing 12 , an end cap 13 and other components.

[0073] The end cap 13 refers to a component that covers the opening of the shell 12 to isolate the internal environment of the battery 10 from the external environment. In some embodiments, the shape of the end cap 13 can be adapted to the shape of the shell 12 to match the shell 12. In some embodiments, the end cap 13 can be made of a material with a certain hardness and strength, so that the end cap 13 is not easily deformed when squeezed or collided, so that the battery 10 can have a higher structural strength and improved safety performance. Among them, the material of the end cap 13 can be diversified, and the end cap 13 can be made of copper, iron, aluminum, stainless steel, aluminum alloy, plastic and other materials. In some embodiments, functional components such as electrode terminals 14 can be provided on the end cap 13. The electrode terminal 14 can be used to electrically connect to the electrode assembly 11 for outputting or inputting electrical energy. In some embodiments, a pressure relief mechanism (not shown in the figure) for releasing internal pressure when the internal pressure or temperature of the battery 10 reaches a threshold can also be provided on the end cap 13. In some embodiments, an insulating member (not shown) may be provided inside the end cap 13 to isolate the electrical connection components in the housing 12 from the end cap 13 to reduce the risk of short circuits. Alternatively, the insulating member may be made of plastic, rubber, or the like.

[0074] The housing 12 is a component that cooperates with the end cap 13 to form the internal environment of the battery 10. The internal environment formed by the housing 12 and the end cap 13 can be used to accommodate components such as the electrode assembly 11 and the electrolyte. In some embodiments, the housing 12 and the end cap 13 can be separate components. An opening can be provided in the housing 12, and the end cap 13 can be placed over the opening to form the internal environment of the battery 10. In some embodiments, the end cap 13 and the housing 12 can be integrated. Specifically, the end cap 13 and the housing 12 can form a common connection surface before other components are inserted into the housing. When the interior of the housing 12 needs to be enclosed, the end cap 13 is placed over the housing 12. The housing 12 can be of various shapes and sizes, such as a rectangular parallelepiped, a cylinder, a hexagonal prism, etc. Specifically, the shape of the housing 12 can be determined based on the specific shape and size of the electrode assembly 11. The material of the housing 12 can be diverse, and the housing 12 can be made of copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc.

[0075] Please also refer to Figure 2 、 Figure 3 , Figure 2 This is a schematic structural diagram of the electrode assembly 11 provided in some embodiments of the present application. Figure 3 for Figure 2A partial schematic diagram of an electrode assembly 11 is provided. The electrode assembly 11 is the component in the battery 10 where the electrochemical reaction occurs. One or more electrode assemblies 11 may be contained within the housing 12. The electrode assembly 11 includes a positive electrode sheet 111, a negative electrode sheet 112, and a separator 113, which separates the positive electrode sheet 111 from the negative electrode sheet 112. The positive electrode sheet 111, the negative electrode sheet 112, and the separator 113 may be formed into the electrode assembly 11 by winding, stacking, or other processing methods.

[0076] In the electrode assembly 11, the positive electrode sheet 111 includes a positive current collector 1111 and a positive active layer 1112. The positive active layer 1112 is disposed on the side of the positive current collector 1111 along the thickness direction. The area of ​​the positive current collector 1111 not provided with the positive active layer 1112 can serve as a positive electrode tab 1113, which is the current output end of the positive electrode sheet 111. The material of the positive current collector 1111 can be aluminum, etc., and the positive active material of the positive active layer 1112 can be lithium cobalt oxide, lithium iron phosphate, ternary lithium, or lithium manganese oxide, etc.

[0077] The negative electrode sheet 112 includes a negative current collector 1121 and a negative active layer 1122. The negative active layer 1122 is disposed on the side of the negative current collector 1121 along the thickness direction. The area of ​​the negative current collector 1121 not provided with the negative active layer 1122 can serve as a negative electrode tab 1123, which is the current output terminal of the negative electrode sheet 112. The negative current collector 1121 can be made of copper, etc., and the negative active material of the negative active layer 1122 can be graphite, carbon, or silicon, etc. The positive electrode tab 1113 and the negative electrode tab 1123 can be located on one side of the electrode assembly 11 or on opposite sides of the electrode assembly 11.

[0078] The separator 113 is an insulating film that separates the positive electrode 111 from the negative electrode 112, preventing a short circuit between the negative electrode 112 and the positive electrode 111. The separator 113 has a plurality of pores through which active ions can freely pass. The separator 113 can be made of materials such as PP (polypropylene) or PE (polyethylene). The active ions can be lithium ions, sodium ions, and the like.

[0079] The electrolyte is a liquid that soaks the electrode assembly 11. The electrolyte includes an electrolyte salt and a solvent. The electrolyte salt may include at least one of lithium hexafluorophosphate, lithium tetrafluoroborate, lithium perchlorate, lithium hexafluoroarsenate, lithium bis(fluorosulfonyl)imide, lithium bis(trifluoromethanesulfonyl)imide, lithium trifluoromethanesulfonate, lithium difluorophosphate, lithium difluorooxalatoborate, lithium dioxalatoborate, lithium difluorodioxalatophosphate, and lithium tetrafluorooxalatophosphate. The solvent may include at least one of ethylene carbonate, propylene carbonate, ethyl methyl carbonate, diethyl carbonate, dimethyl carbonate, dipropyl carbonate, methylpropyl carbonate, ethylpropyl carbonate, butylene carbonate, fluoroethylene carbonate, methyl formate, methyl acetate, ethyl acetate, propyl acetate, methyl propionate, ethyl propionate, propyl propionate, methyl butyrate, ethyl butyrate, 1,4-butyrolactone, cyclopentane, dimethyl sulfone, methyl ethyl sulfone, and diethyl sulfone.

[0080] The battery 10 primarily operates by the movement of active ions between the positive electrode sheet 111 and the negative electrode sheet 112. Specifically, when the battery 10 is charging, the positive electrode sheet 111 generates active ions. The active ions provided by the positive electrode sheet 111 can penetrate the pores of the separator 113, move through the electrolyte to the negative electrode sheet 112, and become embedded in the negative active material of the negative electrode sheet 112. Conversely, when the battery 10 is discharging, the active ions embedded in the negative active material of the negative electrode sheet 112 are released. The active ions released from the negative electrode sheet 112 can penetrate the pores of the separator 113, move through the electrolyte to the positive electrode sheet 111, and become embedded in the positive active material of the positive electrode sheet 111.

[0081] After the preparation of the battery 10 is completed, it needs to go through an important process, namely the battery 10 formation process. The battery 10 formation process refers to the process in which, after the preparation of the battery 10 is completed, the active material in the battery 10 is activated for the first time by the charge and discharge method, and a SEI film (not shown in the figure) is generated on the surface of the electrode active layer (usually the negative electrode active layer 1122). Specifically, during the formation process of the battery 10, the solvent in the electrolyte decomposes, and the decomposed solvent molecules react chemically with electrons and active ions to form an SEI film on the surface of the electrode active layer (usually the negative electrode active layer 1122), and a certain amount of gas is generated. Among them, the SEI film generated can prevent the electrode active material (usually the negative electrode active material) from undergoing redox reaction with the electrolyte, thereby ensuring the electrochemical stability, cycle life, and self-discharge and other electrical properties of the battery 10. Among them, the accompanying gases are basically insulating gases (such as hydrocarbon gases). If they are not discharged in time, the gases will block the active ion channels, resulting in the active ions being unable to smoothly embed into the active layer of the electrode, thereby causing problems such as black spots and lithium precipitation on the electrode, thereby affecting the film formation quality of the SEI film, the formation effect of the battery 10, and the electrochemical stability, cycle life, self-discharge and other electrical properties of the battery 10. Therefore, a formation system can be used to promote the timely discharge of gases from the battery 10 during the formation of the battery 10.

[0082] See also Figure 1 、 Figure 4 、 Figure 5 Some embodiments of the present application provide a formation system that can be used to facilitate timely discharge of gas from the battery 10 during the formation of the battery 10.

[0083] The formation system includes a battery tray 20 and an air supply conduit 30. The battery tray 20 includes at least one airbag assembly 21. The airbag assembly 21 comprises multiple elastic airbag structures 211, spaced apart along a first direction x. A clamping space 212 is formed between adjacent airbag structures 211 for loading batteries 10. The air supply conduit 30 communicates with each airbag structure 211 and is used to connect to an external air source 90.

[0084] It should be noted that the battery tray 20 is a tool for loading batteries 10. The battery tray 20 includes an airbag assembly 21. Among them, one airbag assembly 21 can be provided, or multiple airbag assemblies 21 can be provided. When multiple airbag assemblies 21 are provided, the multiple airbag assemblies 21 can be arranged in rows, that is, the multiple airbag assemblies 21 can be in different rows. For example, the battery tray 20 may include two airbag assemblies 21, and the two airbag assemblies 21 are arranged at intervals along the second direction, and the second direction is perpendicular to the first direction x. Such an arrangement can facilitate the regular loading of more batteries 10 through the two airbag assemblies 21, thereby facilitating the simultaneous formation of multiple batteries 10 and the exhaust during the formation, thereby facilitating both ensuring and improving the formation efficiency and formation effect of multiple batteries 10.

[0085] The airbag assembly 21 includes multiple airbag structures 211. These structures 211 exhibit excellent elasticity, allowing them to expand and deflate upon inflation. Specifically, the airbag structures 211 comprise hollow, flexible capsules (similar to balloons, but with enhanced elasticity). By inflating the capsules, the air can cause them to expand and resist bursting. Conversely, by releasing the air from the capsules, the capsules can be deflated, returning to their original, deflated form.

[0086] In the same airbag assembly 21, the airbag structures 211 are spaced apart along the first direction x, such that the initial gap between each two adjacent airbag structures 211 forms a clamping space 212, which can be used to load the battery 10. The airbag structures 211 can be arranged parallel to each other or at a small angle, as long as the clamping space 212 formed between two adjacent airbag structures 211 can be used to load the battery 10. The width d of each clamping space 212 in the first direction x can be set equal or unequal. In other words, the airbag structures 211 of the airbag assembly 21 can be arranged at equal or unequal intervals.

[0087] The battery tray 20 can be a fixed component fixed to the formation storage location. In this case, the battery tray 20 is only used in the formation system. Alternatively, the battery tray 20 can be a movable component that can move and pass through the formation storage location. In this case, the battery tray 20 can be docked in the formation storage location for use in the formation system, or it can be moved together with the batteries 10 it carries to other storage locations such as injection, volume separation, and measurement for use in other systems.

[0088] It should also be noted that the air supply pipe 30 is a component for transmitting gas, and in particular, the interior of the air supply pipe 30 can guide the flow of gas. The air supply pipe 30 is communicated with each air bag structure 211 and is communicated with an external air source 90. Wherein, the external air source 90 can be, but is not limited to, an air pump, a gas tank, etc. Wherein, the driving force for driving the gas to flow in the air supply pipe 30 can come from an external air source 90 such as an air pump, or from other components. Wherein, the air supply pipe 30 can be fixed to the formation storage location, and no matter whether the battery tray 20 is a fixed component fixed to the formation storage location, or a movable component that can move and pass through the formation storage location, the air supply pipe 30 can be communicated with each air bag structure 211 of the battery tray 20. Of course, in the case where the battery tray 20 is a fixed component fixed to the formation storage location, the air supply pipe 30 can also be fixed on the battery tray 20.

[0089] Based on this, the air supply pipe 30 can transmit the gas output by the external air source 90 to the interior of the airbag structure 211 to inflate the airbag structure 211, causing the airbag structure 211 to gradually expand. As the airbag structure 211 expands, the internal air pressure of the airbag structure 211 gradually increases. Conversely, the air supply pipe 30 can reversely transmit the gas in the airbag structure 211 to the external air source 90 to deflate the airbag structure 211, causing the airbag structure 211 to gradually deflate. As the airbag structure 211 deflates, the internal air pressure of the airbag structure 211 gradually decreases.

[0090] In this way, any two adjacent airbag structures 211 filled with gas can be used to press and apply pressure to the battery 10 in the clamping space 212 therebetween, so as to form a pressing, clamping, restraining, and binding effect on the battery 10. In addition, the airbag structure 211 can increase the pressure on the battery 10 by inflation and reduce the pressure on the battery 10 by deflation to ensure that the pressure on the battery 10 can meet the exhaust requirements. In addition, since the airbag structure 211 has good elasticity, the surface of the airbag structure 211 can be tightly and elastically pressed against the entire side of the battery 10, so that the pressure of the airbag structure 211 on the battery 10 can be relatively evenly distributed on the entire side of the battery 10, so that the battery 10 and the electrode assembly 11 therein can be subjected to uniform pressure. Therefore, any two adjacent airbag structures 211 filled with gas can form a better pressing, clamping, restraining and binding effect on the battery 10, and can reliably suppress the interlayer gap of the electrode assembly 11 inside the battery 10, thereby effectively promoting the gas generated during the formation of the battery 10 to be discharged from the battery 10 in a timely manner.

[0091] In summary, the formation system provided in the embodiment of the present application can load the battery 10 through the battery tray 20, and in particular can load the battery 10 through the clamping space 212 between two adjacent airbag structures 211 of the airbag assembly 21. The external gas source 90 and each airbag structure 211 can also be connected through an air supply channel to transmit gas between the external gas source 90 and each airbag structure 211, thereby inflating or deflating the airbag structure 211. Based on this, when the battery 10 is placed in the clamping space 212 and the battery 10 is formed, the airbag structures 211 on opposite sides of the battery 10 can adjust the internal air pressure of the airbag structure 211 by inflating or deflating, so that the airbag structure 211 has a certain internal air pressure, so as to jointly press and pressurize the battery 10 located therebetween. During this period, due to the inherent elasticity of the airbag structure 211, the surface of the airbag structure 211 can tightly and elastically press against the entire side of the battery 10, so that the pressure exerted by the airbag structure 211 on the battery 10 is relatively evenly distributed across the entire side of the battery 10, thereby uniformly pressuring the battery 10 and the electrode assembly 11 therein. As a result, the airbag structures 211 on opposite sides of the battery 10 can collectively form an effective pressing, clamping, restraining, and binding effect on the battery 10 located therebetween, reliably suppressing interlayer gaps within the electrode assembly 11 within the battery 10 during formation. This effectively allows gases generated during formation to be promptly discharged from the battery 10, effectively ensuring and improving the gas exhaust efficiency during formation. This effectively reduces the risk of gas blocking active ion channels, leading to problems such as black spots and lithium deposition on the electrode sheets, thereby ensuring and improving the SEI film formation quality, battery 10 formation efficiency, and the electrochemical stability, cycle life, and self-discharge performance of the battery 10.

[0092] Moreover, since the battery 10 is placed in the clamping space 212, during the formation process of the battery 10, the airbag structure 211 on the opposite sides of the battery 10 can form a certain limiting effect on the battery 10 therebetween, thereby helping to ensure and improve the position stability of the battery 10 during the formation process, and reducing the risk of the probe of the formation machine being offset due to changes in the position of the battery 10, thereby improving the formation success rate and the formation quality rate, and reducing the formation rework rate.

[0093] Furthermore, due to the elasticity of the airbag structure 211 itself, when the airbag structure 211 presses or applies pressure to the battery 10 , the housing 12 of the battery 10 and the battery 10 are not easily crushed.

[0094] Furthermore, the pressurization method of the formation system is simple and convenient, and requires fewer devices, thereby reducing costs and the space required for the entire formation system.

[0095] See also Figure 1 、 Figure 4 、 Figure 5 In some embodiments of the present application, the formation system further includes a regulating valve 40 provided on the gas supply pipeline 30 , and the regulating valve 40 is used to adjust the pressure and / or flow of the gas transmitted by the gas supply pipeline 30 .

[0096] It should be noted that the regulating valve 40 is a control valve, i.e., a controllable valve comprising at least one inlet and at least two outlets. The regulating valve 40 is disposed on the gas supply pipeline 30, specifically between the battery tray 20 and the external gas source 90. The regulating valve 40 is capable of regulating the pressure and / or flow of the gas transmitted by the gas supply pipeline 30 (i.e., it can control only the pressure, only the flow, or both pressure and flow), and in particular, it is capable of controlling the pressure and / or flow of the gas output from at least one outlet.

[0097] The regulating valve 40 can be a controllable three-way valve of various types. The regulating valve 40 can be an automatic regulating valve (such as an electric regulating valve) with an actuator, or a manual regulating valve controlled by humans.

[0098] By adopting the above-described solution, the pressure and / or flow of the gas transmitted by the gas supply pipe 30 can be quickly and easily adjusted via the regulating valve 40 during the formation process of the battery 10, thereby conveniently, quickly, and reliably adjusting the inflation or deflation amplitude of the airbag structure 211. This allows for convenient, quick, and reliable adjustment of the internal air pressure of the airbag structure 211, and the pressure and restraint force exerted by each set of two adjacent airbag structures 211 on the battery 10 therebetween. In particular, during the formation process of the battery 10, as the electrode assembly 11 expands, the required restraint force of the battery 10 increases. Based on the configuration of this embodiment, the internal air pressure of the airbag structure 211 can be controlled via the regulating valve 40 to increase adaptively as the electrode assembly 11 expands, thereby enhancing the pressure and restraint force exerted by each set of two adjacent airbag structures 211 on the battery 10 therebetween. Therefore, based on the regulating valve 40, the internal air pressure of the airbag structure 211 and the pressure of the airbag structure 211 on the battery 10 are controllable, thereby ensuring and improving the restraint effect of the formation system on the battery 10 during the formation of the battery 10, ensuring and improving the exhaust effect of the battery 10 during the formation, and then improving the formation effect of the battery 10 and the formation quality rate of the battery 10, saving the time of the formation process, reducing the formation rework rate, and improving the film formation quality of the SEI film and the performance of the battery 10.

[0099] See also Figure 1 、 Figure 4 、 Figure 5 In some embodiments of the present application, the formation system further includes a controller 50 , which is connected to the regulating valve 40 , and is used to control the regulating valve 40 .

[0100] It should be noted that the controller 50 refers to a control device that can process an input signal and output a control signal.

[0101] The controller 50 may be, but is not limited to, a programmable logic controller (PLC), a single-chip microcomputer (MCU), a microcontroller unit (MCU), a timer program controller (such as a TPC-type timer program controller), etc.

[0102] The controller 50 is connected to the regulating valve 40. Specifically, the controller 50 and the regulating valve 40 can be electrically connected or signal-connected, and can be wired or wirelessly connected. The controller 50 can output a control signal to the regulating valve 40 to control the regulating valve 40 to adjust the pressure and / or flow of the gas transmitted by the gas supply pipeline 30.

[0103] By adopting the above-mentioned scheme, it is convenient to automatically control the regulating valve 40 through the controller 50 during the formation process of the battery 10, so that the regulating valve 40 can quickly, automatically and controllably adjust the pressure and / or flow of the gas transmitted by the gas supply pipe 30, thereby quickly, reliably, automatically and controllably adjusting the internal air pressure of the airbag structure 211 and the pressure of the airbag structure 211 on the battery 10, thereby ensuring and improving the restraint effect of the formation system on the battery 10 during the formation of the battery 10, ensuring and improving the exhaust effect of the battery 10 during the formation, and then improving the formation effect, formation quality and formation consistency, saving the time of the formation process, reducing the formation rework rate, and improving the film formation quality of the SEI film and the performance of the battery 10.

[0104] Of course, in other possible implementations, the regulating valve 40 may be a manual regulating valve, and the controller 50 may be omitted.

[0105] See also Figure 1 、 Figure 4 、 Figure 5 In some embodiments of the present application, the formation system further includes a gas pressure detector 60 provided on the gas supply pipe 30, and the gas pressure detector 60 is located between the regulating valve 40 and the battery tray 20. The gas pressure detector 60 is used to detect the pressure of the gas transmitted by the gas supply pipe 30.

[0106] It should be noted that the air pressure detector 60 is a detection element capable of detecting gas pressure. The air pressure detector 60 may be, but is not limited to, a barometer, a pressure gauge, or an air pressure sensor. The air pressure detector 60 is located on the gas supply pipe 30, specifically between the regulating valve 40 and the battery tray 20. The air pressure detector 60 is capable of detecting the pressure of the gas transmitted by the gas supply pipe 30. The regulating valve 40 can be adjusted based on the detection results of the air pressure detector 60.

[0107] By adopting the above-mentioned scheme, during the formation process of the battery 10, the air pressure detector 60 can be used to detect the pressure of the gas transmitted by the air supply pipe 30 in real time in the air supply pipe 30 portion between the regulating valve 40 and the battery tray 20, so that the regulating valve 40 can be adaptively controlled manually or automatically for adjustment according to the detection result of the air pressure detector 60, so that the regulating valve 40 can quickly, controllably and accurately adjust the pressure and / or flow of the gas transmitted by the air supply pipe 30 as needed, so that during the formation process of the battery 10, the internal air pressure of the airbag structure 211 and the pressure of the airbag structure 211 on the battery 10 can be quickly, controllably, timely and accurately adjusted, thereby ensuring and improving the restraint effect of the formation system on the battery 10 during the formation of the battery 10, ensuring and improving the exhaust effect of the battery 10 during the formation, and thus improving the formation effect, formation quality and formation consistency, saving the time of the formation process, reducing the formation rework rate, and improving the film formation quality of the SEI film and the performance of the battery 10.

[0108] See also Figure 1 、 Figure 4 、 Figure 5 In some embodiments of the present application, the air pressure detector 60 is in communication with the controller 50 , and the controller 50 is used to control the regulating valve 40 according to the detection data of the air pressure detector 60 .

[0109] It should be noted that the communication connection between the air pressure detector 60 and the controller 50 refers to a connection method in which the detection data of the air pressure detector 60 can be transmitted to the controller 50, which can be a wired connection or a wireless connection. The controller 50 can receive the detection data of the air pressure detector 60, analyze and process the detection data of the air pressure detector 60, and then output a control signal to the regulating valve 40 to control the regulating valve 40 to adjust according to the detection data of the air pressure detector 60.

[0110] By adopting the above solution, the pressure of the gas transmitted by the gas supply pipeline 30 can be detected in real time by the air pressure detector 60, and the controller 50 can quickly, promptly, and automatically control the regulating valve 40 to adjust the pressure and / or flow of the gas transmitted by the gas supply pipeline 30 based on the detection data of the air pressure detector 60, so that the regulating valve 40 can quickly, promptly, controllably, and accurately adjust the pressure and / or flow of the gas transmitted by the gas supply pipeline 30. In particular, when the pressure of the gas decreases due to a gas leak or other reasons, the controller 50 can promptly control the regulating valve 40 to adjust the pressure and / or flow of the gas transmitted by the gas supply pipeline 30 based on the detection data of the air pressure detector 60, thereby promptly increasing the pressure and / or flow of the gas transmitted by the gas supply pipeline 30, thereby achieving pressure error prevention. In this way, during the formation process of the battery 10, the internal air pressure of the airbag structure 211 and the pressure of the airbag structure 211 on the battery 10 can be monitored in real time, and can be quickly, timely, controllably and accurately adjusted. This can ensure and improve the restraint effect of the formation system on the battery 10 during the formation of the battery 10, ensure and improve the exhaust effect of the battery 10 during the formation, and further improve the formation effect, formation quality and formation consistency, save the time of the formation process, reduce the formation rework rate, and improve the film formation quality of the SEI film and the performance of the battery 10.

[0111] Of course, in other possible implementations, when the controller 50 is omitted, the detection data of the air pressure detector 60 can be directly displayed, so that the regulating valve 40 can be manually adjusted according to the detection data of the air pressure detector 60.

[0112] Of course, in other possible implementations, when the air pressure detector 60 is omitted, the controller 50 can control the regulating valve 40 according to a preset program.

[0113] See also Figure 1 、 Figure 4 、 Figure 5In some embodiments of the present application, the formation system further includes a reducer 70 provided on the gas supply pipe 30 , the reducer 70 is located between the regulating valve 40 and the battery tray 20 , and the reducer 70 is used to reduce the flow rate of the gas transmitted by the gas supply pipe 30 .

[0114] It should be noted that the reducer 70 is a component that reduces the flow rate of gas. It is located on the gas supply pipe 30, specifically between the regulating valve 40 and the battery tray 20. The reducer 70 reduces the flow rate of gas transmitted by the gas supply pipe 30, thereby buffering the amplitude of air pressure fluctuations and reducing sudden changes in air pressure.

[0115] By adopting the above-mentioned scheme, during the formation process of the battery 10, especially during the period when the regulating valve 40 adjusts the pressure and / or flow of the gas transmitted by the gas supply pipe 30, the reducer 70 can be used to reduce the flow rate of the gas transmitted by the gas supply pipe 30 in the part of the gas supply pipe 30 between the regulating valve 40 and the battery tray 20, so as to buffer the amplitude of the change in air pressure, reduce the sudden change in air pressure, and reduce the impact of the sudden change in air pressure on the airbag structure 211, thereby facilitating the precise adjustment of the internal air pressure of the airbag structure 211 and the pressure of the airbag structure 211 on the battery 10, and helping to protect and extend the service life of the airbag structure 211, the battery tray 20 and the formation system.

[0116] See also Figure 1 、 Figure 4 、 Figure 5 In some embodiments of the present application, the regulating valve 40 includes at least one of a solenoid valve and a proportional valve.

[0117] It should be noted that the solenoid valve is an electromagnetically controlled control valve that can be used to automatically adjust parameters such as the direction, flow rate, and speed of the gas transmitted by the gas supply pipeline 30. The solenoid valve has high control accuracy and flexibility.

[0118] The proportional valve is an electrically controlled control valve that can open the valve port as needed and make the valve port present a desired opening, thereby controlling the flow rate of gas through the gas supply pipeline 30. The proportional valve can achieve continuous control and proportional control.

[0119] By adopting the above solution, the regulating valve 40 can be a solenoid valve or a proportional valve, so that the regulating valve 40 can accurately adjust the flow rate of the gas transmitted by the gas supply pipe 30, thereby effectively improving the convenience and accuracy of adjusting the internal air pressure of the airbag structure 211 and the pressure of the airbag structure 211 on the battery 10.

[0120] Of course, in other possible implementations, the regulating valve 40 may be other types of control valves.

[0121] See also Figure 1 、 Figure 4 、 Figure 5In some embodiments of the present application, the formation system further includes a switch valve 80 provided on the gas supply pipeline 30 , and the switch valve 80 is used to open or close the gas supply pipeline 30 .

[0122] It should be noted that the switch valve 80 is a valve that can be switched between an open state and a closed state. The switch valve 80 is provided on the gas supply pipe 30 and can be provided at any position of the gas supply pipe 30, for example, it can be provided between the regulating valve 40 and the battery tray 20. The switch valve 80 can be used to open or close the gas supply pipe 30. When the switch valve 80 opens the gas supply pipe 30, it allows gas to flow along the gas supply pipe 30, and in particular, allows gas to pass through the switch valve 80. When the switch valve 80 closes the gas supply pipe 30, it prevents gas from flowing along the gas supply pipe 30, and in particular, prevents gas from passing through the switch valve 80.

[0123] The switch valve 80 may be a two-way valve of various types that can be opened and closed. The switch valve 80 may be an automatic switch valve automatically controlled by the controller 50 or other components, or a manual switch valve manually controlled.

[0124] By adopting the above solution, when the formation system is in operation, the gas supply pipeline 30 can be opened by the switch valve 80 to allow the airbag structure 211 to be inflated or deflated. Conversely, when the formation system is idle, the gas supply pipeline 30 can be closed by the switch valve 80 to reduce the loss of gas from the external gas source 90.

[0125] See also Figure 1 、 Figure 4 In some embodiments of the present application, each airbag structure 211 is connected in parallel to the air supply pipe 30.

[0126] It should be noted that the airbag structures 211 are arranged in parallel and are all connected to the air supply pipe 30. Specifically, the air supply pipe 30 includes a main pipe 31 and multiple first branch pipes 32. Each first branch pipe 32 is connected in parallel to the main pipe 31, and each first branch pipe 32 is connected to each airbag structure 211 in a one-to-one correspondence.

[0127] By adopting the above solution, each airbag structure 211 can be connected in parallel to the air supply pipe 30, so that the air supply pipe 30 can inflate or deflate each airbag structure 211 simultaneously, so that the internal air pressure of each airbag structure 211 increases and decreases with a consistent amplitude, and the internal air pressure of each airbag structure 211 is essentially isobaric. Based on this, the pressure and restraint force exerted by two adjacent airbag structures 211 on the battery 10 between them can be basically consistent, thereby ensuring and improving the formation consistency of each battery 10 by the formation system, improving the formation effect and battery 10 quality rate, saving time in the formation process, and reducing the formation rework rate.

[0128] See also Figure 1、 Figure 5 In some embodiments of the present application, each airbag structure 211 is connected in series to the air supply pipe 30.

[0129] It should be noted that the airbag structures 211 are arranged in series and ultimately connected to the air supply pipe 30. Specifically, the air supply pipe 30 includes a main pipe 31 and multiple second branch pipes 33. Each group of two adjacent airbag structures 211 is connected through the second branch pipes 33. The airbag structure 211 at the beginning or end of the series relationship is connected to the main pipe 31 through the second branch pipes 33.

[0130] By adopting the above solution, each airbag structure 211 can be connected in series to the air supply pipe 30, so that the air supply pipe 30 can inflate or deflate each airbag structure 211 simultaneously, so that the internal air pressure of each airbag structure 211 increases or decreases with substantially the same amplitude, and the internal air pressure of each airbag structure 211 is substantially isobaric. Based on this, the pressure and restraint force exerted by two adjacent airbag structures 211 on the battery 10 between them can be substantially consistent, thereby ensuring and improving the formation consistency of each battery 10 by the formation system, improving the formation effect and quality rate of the battery 10, saving time in the formation process, and reducing the formation rework rate.

[0131] Of course, in other possible implementations, the airbag structures 211 may be connected in parallel to the air supply pipe 30. Parallel connection refers to both series connection and parallel connection.

[0132] See also Figure 1 、 Figure 4 、 Figure 5 In some embodiments of the present application, the battery tray 20 further includes a base 22 , and the airbag assembly 21 is mounted on the base 22 .

[0133] It should be noted that the battery tray 20 includes a base 22, which is a rigid component used to mount and support the airbag assembly 21. The base 22 may be, but is not limited to, a plate-shaped structure. The airbag assembly 21 is mounted on the base 22, and the connection between the airbag assembly 21 and the base 22 may be detachable or fixed.

[0134] By adopting the above-mentioned scheme, the battery tray 20 can install the airbag assembly 21 through the base 22 to support the airbag assembly 21 and help stabilize the installation position and installation state of the airbag assembly 21, thereby ensuring that the airbag assembly 21 can reliably play the role of pressing and restraining, which can help to ensure and improve the performance and service life of the battery tray 20.

[0135] See also Figure 1 、 Figure 4 、 Figure 5In some embodiments of the present application, the battery tray 20 further includes a fixing component 23 , which is disposed corresponding to the airbag component 21 , and the fixing component 23 is used to stabilize each airbag structure 211 of the airbag component 21 .

[0136] It should be noted that the battery tray 20 includes a fixing assembly 23, which is provided in equal numbers and in a one-to-one correspondence with the airbag assembly 21. The fixing assembly 23 is used to stabilize the airbag structures 211 of the airbag assembly 21, specifically to stabilize the relative positions and states of the airbag structures 211 of the airbag assembly 21.

[0137] By adopting the above-mentioned scheme, the battery tray 20 can limit the installation of the airbag assembly 21 through the fixing assembly 23, especially stabilizing the relative position and relative state of each airbag structure 211 of the airbag assembly 21, thereby ensuring that each airbag structure 211 of the airbag assembly 21 can reliably exert pressure, restraint and other effects on the battery 10, which can help to ensure and improve the structural reliability and use reliability of the battery tray 20.

[0138] See also Figure 1 、 Figure 4 、 Figure 5 In some embodiments of the present application, the fixing assembly 23 includes two fixing members 231 and at least one limiting member 232. The two fixing members 231 are spaced apart along the first direction x. The limiting member 232 extends along the first direction x and is connected to the two fixing members 231. Each airbag structure 211 of the airbag assembly 21 is disposed between the two fixing members 231 and is connected to the limiting member 232.

[0139] It should be noted that the fixing assembly 23 includes a fixing part 231 and a limiting part 232. Two fixing parts 231 are provided, and the fixing parts 231 may be in the shape of, but not limited to, a plate. The two fixing parts 231 are arranged at intervals along the first direction x, wherein the two fixing parts 231 may be arranged parallel to each other or at a small angle. One or more limiting parts 232 may be provided, and the limiting part 232 may be in the shape of, but not limited to, a rod. The limiting part 232 is extended along the first direction x, and the opposite ends of the limiting part 232 are respectively connected to the two fixing parts 231. Based on this, the fixing assembly 23 can enclose an installation space through the fixing parts 231 and the limiting parts 232, so that the airbag assembly 21 can be installed in the installation space with a limited position.

[0140] In addition to being positionally mounted within the mounting space, each airbag structure 211 of the airbag assembly 21 is also connected to a position-limiting member 232 to stabilize the relative positions and states of the airbag structures 211. The connection between the airbag structure 211 and the position-limiting member 232 can be either a detachable or fixed connection.

[0141] By adopting the above solution, the fixing assembly 23 can enclose an installation space by means of two fixing members 231 spaced apart along the first direction x, and a limiting member 232 extending along the first direction x and connected to the two fixing members 231, so as to limit the installation of the airbag assembly 21. The fixing assembly 23 can also reliably stabilize the relative position and relative state of each airbag structure 211 of the airbag assembly 21 by connecting the limiting member 232 to each airbag structure 211. In this way, the fixing assembly 23 can ensure that each airbag structure 211 of the airbag assembly 21 can stabilize the relative position and relative state of each other, thereby ensuring that each airbag structure 211 of the airbag assembly 21 can reliably exert pressure, restraint, and other effects on the battery 10, which can help to ensure and improve the structural reliability and use reliability of the battery tray 20.

[0142] Moreover, by adopting the above-mentioned scheme, when the battery 10 is placed in the clamping space 212, the limiting member 232 can form a certain limiting effect on the battery 10, thereby helping to ensure and improve the position stability of the battery 10 during the formation process, and reducing the risk of the probe of the formation machine being offset due to changes in the position of the battery 10, thereby improving the formation success rate and the formation quality rate, and reducing the formation rework rate.

[0143] See also Figure 4 、 Figure 5 、 Figure 6 In some embodiments of the present application, the airbag structure 211 includes a frame 2111 and an airbag 2112 installed in the frame 2111 .

[0144] It should be noted that the airbag structure 211 includes a frame 2111 and an airbag 2112. The frame 2111 is a rigid component for installing and supporting the airbag 2112. The frame 2111 may be, but is not limited to, a rectangular frame 2111. The airbag 2112 is a hollow flexible capsule (a bit like a balloon, but with better elasticity). The airbag 2112 can be made of any recoverable elastic material and has better elasticity. The airbag 2112 can be inflated and swelled, and can be deflated to exert pressure, restraint, and other effects on the battery 10. The airbag 2112 is installed in the frame 2111 and is fixedly connected to the frame 2111. The connection method between the airbag 2112 and the frame 2111 is not limited.

[0145] By adopting this solution, the airbag structure 211 can be mounted and supported by the airbag 2112 via the frame 2111, and the frame 2111 facilitates the overall installation and fixation of the airbag structure 211. The airbag structure 211 can also reliably exert pressure and restraint on the battery 10 through the inflation and deflation of the airbag 2112, without compressing the battery housing 12 or the battery 10. This ensures and improves the structural and operational reliability of the airbag structure 211.

[0146] See also Figure 4 、 Figure 5 、 Figure 6 In some embodiments of the present application, the airbag 2112 is connected to the frame 2111 by at least one of adhesion, pressing, and vulcanization.

[0147] It should be noted that the airbag 2112 and the frame 2111 can be bonded together by an adhesive; or, the airbag 2112 and the frame 2111 can be connected and fixed together by a pressing process; or, the airbag 2112 and the frame 2111 can be connected and fixed together by vulcanization (cross-linking, aging).

[0148] By adopting the above-mentioned scheme, the airbag 2112 can be connected and fixed to the frame 2111 by at least one of adhesion, pressing, and vulcanization. Based on this, the connection stability and connection sealing between the airbag 2112 and the frame 2111 can be guaranteed and improved, thereby ensuring and improving the structural reliability and use reliability of the airbag structure 211, and reducing the risk of the airbag 2112 falling off.

[0149] Of course, in other possible implementations, other connection methods may be used between the airbag 2112 and the frame 2111.

[0150] See also Figure 6 In some embodiments of the present application, the frame 2111 includes at least one of aluminum, stainless steel, and hard plastic.

[0151] It should be noted that the frame 2111 can be made of at least one of aluminum, stainless steel, and rigid plastic. The stainless steel can be, but is not limited to, 304 stainless steel. The rigid plastic can be, but is not limited to, ABS (Acrylonitrile Butadiene Styrene), POM (Polyoxymethylene), PS (Polystyrene), PMMA (Polymethyl methacrylate), PC (Polycarbonate), PET (Polyethylene terephthalate), and the like.

[0152] By adopting the above solution, the rigidity and structural strength of the frame 2111 can be guaranteed and improved, thereby ensuring and improving the supporting effect of the frame 2111 on the airbag 2112, and ensuring and improving the structural reliability and service life of the airbag structure 211.

[0153] See also Figure 4 、 Figure 5 、 Figure 6 In some embodiments of the present application, the airbag assembly 21 further includes a mounting bracket 213 , which is correspondingly arranged in the clamping space 212 , and the mounting bracket 213 is provided with a mounting groove 2131 , which extends along the first direction x and passes through the mounting bracket 213 .

[0154] It should be noted that the airbag assembly 21 includes a mounting bracket 213. Within the same airbag assembly 21, the mounting bracket 213 is positioned corresponding to the clamping space 212. Specifically, the mounting bracket 213 is mounted within the clamping space 212. The mounting bracket 213 is provided with a mounting slot 2131, which facilitates installation of the battery 10 within the mounting slot 2131 via the notch of the mounting slot 2131. The mounting slot 2131 extends along the first direction x and passes through the mounting bracket 213. This allows the airbag structures 211 on opposite sides of the mounting slot 2131 to exert pressure and restraint on the battery 10 within the mounting slot 2131.

[0155] By adopting the above solution, the mounting bracket 213 can be provided in the clamping space 212 so as to limit the installation of the battery 10 through the mounting slot 2131 of the mounting bracket 213. Based on this, the airbag structures 211 on opposite sides of the mounting slot 2131 can reliably exert pressure and restraint effects on the battery 10 in the mounting slot 2131. In addition, during the formation process of the battery 10, the mounting bracket 213 can form a reliable limiting effect on the battery 10, thereby ensuring and improving the positional stability of the battery 10 during the formation process, reducing the risk of the probe of the formation machine being offset due to changes in the position of the battery 10, thereby improving the formation success rate and the formation quality rate, and reducing the formation rework rate.

[0156] See also Figure 1 、 Figure 4 、 Figure 5 In some embodiments of the present application, the width d of the clamping space 212 in the first direction x is 1 mm to 2 mm greater than the thickness of the electrode assembly 11 of the battery 10 loaded in the clamping space 212. That is, the width d of the clamping space 212 in the first direction x is slightly greater than the thickness of the electrode assembly 11 of the battery 10 loaded in the clamping space 212 in the first direction x by 1 mm to 2 mm.

[0157] By adopting the above scheme, by making the width d of the clamping space 212 in the first direction x slightly larger by 1mm to 2mm than the thickness of the electrode assembly 11 of the battery 10 installed in the corresponding clamping space 212 in the first direction x, it is not only convenient for the airbag structure 211 on the opposite sides of the clamping space 212 to reliably exert pressure, restraint and other functions on the battery 10 in the clamping space 212, but also convenient for taking and installing the battery 10 in the clamping space 212, thereby improving the convenience of taking the battery 10 out of the clamping space 212.

[0158] See also Figure 4 、 Figure 5 、 Figure 6 , based on the above embodiments, the embodiments of the present application provide a specific example of a formation system.

[0159] The formation system includes a battery tray 20. The battery tray 20 includes a base 22, and a fixing assembly 23 and an airbag assembly 21 both provided on the base 22. The fixing assembly 23 and the airbag assembly 21 are provided correspondingly. The fixing assembly 23 includes a fixing part 231 and a limiting part 232. Two fixing parts 231 are provided, and the fixing parts 231 are plate-shaped and upright on the base 22. The two fixing parts 231 are arranged at intervals along the first direction x and are arranged parallel to each other. A plurality of limiting parts 232 are provided, and the limiting parts 232 are rod-shaped and extend along the first direction x, and the opposite ends of the limiting parts 232 are connected to the two fixing parts 231. The fixing parts 231 and the limiting parts 232 of the fixing assembly 23 can be enclosed together to form an installation space for limiting the installation of the airbag assembly 21.

[0160] The airbag assembly 21 is limitedly installed in the installation space. The airbag assembly 21 includes a plurality of airbag structures 211 all erected on the base 22. The airbag structure 211 includes a frame 2111, and an airbag 2112 installed in the frame 2111. The airbag 2112 is made of any recoverable elastic material, has good elasticity, can be inflated and expanded, and can be deflated. The plurality of airbag structures 211 are arranged at intervals along the first direction x and are arranged parallel to each other. The airbag structure 211 is connected to the base 22 and the limiting member 232 to stabilize the relative position and relative state between the airbag structures 211 of the airbag assembly 21. In the airbag assembly 21, the initial gap space between each two adjacent airbag structures 211 forms a clamping space 212, and a mounting bracket 213 can be provided in the clamping space 212. The mounting bracket 213 has a mounting groove 2131, and the mounting groove 2131 can be used to load the battery 10.

[0161] The formation system further includes an air supply pipe 30 . The air supply pipe 30 is in communication with each air bag structure 211 . One end of the air supply pipe 30 away from the battery tray 20 is in communication with an external air source 90 .

[0162] The formation system also includes a pressure detector 60, an on-off valve 80, a reducer 70, a regulating valve 40, and a controller 50. The pressure detector 60, the on-off valve 80, the reducer 70, and the regulating valve 40 are all located on the gas supply pipeline 30 and are spaced apart in sequence in a direction close to the external gas source 90. The on-off valve 80 is used to open or close the gas supply pipeline 30. The pressure detector 60 and the regulating valve 40 are both communicatively connected to the controller 50. The pressure detector 60 is used to detect the pressure of the gas transmitted by the gas supply pipeline 30 and can transmit the detection data to the controller 50. The controller 50 is used to control the regulating valve 40 based on the detection data from the pressure detector 60. The regulating valve 40 is used to adjust the flow rate of the gas transmitted by the gas supply pipeline 30 under the control of the controller 50. The reducer 70 is used to cooperate with the regulating valve 40 to reduce the flow rate of the gas transmitted by the gas supply pipeline 30 to buffer the amplitude of the air pressure change and reduce sudden changes in air pressure.

[0163] Based on the above arrangement, when the battery 10 is placed in the clamping space 212 and the battery 10 is formed, the switch valve 80 can first open the gas supply pipe 30, and then the gas output from the external gas source 90 can be transmitted to the interior of the airbag structure 211 through the gas supply pipe 30 to inflate the airbag structure 211, causing the airbag structure 211 to expand. In this way, the two adjacent inflated airbag structures 211 can cooperate and jointly press and apply pressure to the battery 10 in the clamping space 212 therebetween. Moreover, based on the elasticity of the airbag structure 211 itself, the surface of the airbag structure 211 can tightly and elastically press against the entire side of the battery 10, so that the pressure of the airbag structure 211 on the battery 10 can be relatively evenly distributed across the entire side of the battery 10, so that the battery 10 and the electrode assembly 11 therein can be subjected to uniform pressure. Thus, the battery 10 can be pressed, clamped, restrained, and bound in a better manner, thereby reliably preventing the electrode assembly 11 (such as Figure 1 The interlayer gaps (as shown) are narrowed, and the gases generated during the formation of the battery 10 are promptly discharged from the battery 10. This promotes exhaust, ensures and improves the exhaust effect during the formation of the battery 10, and reduces the risk of gas blocking active ion channels, causing black spots on the electrode and lithium deposition. This further ensures and improves the film formation quality of the SEI film, the formation effect of the battery 10, and the electrochemical stability, cycle life, self-discharge and other performance of the battery 10.

[0164] During this process, the air pressure detector 60 can monitor the pressure of the gas transmitted through the gas supply pipe 30 in real time and transmit the detected data to the controller 50. Based on the detection data from the air pressure detector 60, if the gas pressure does not meet the required level, the controller 50 can quickly, promptly, and automatically control the regulating valve 40 to adjust the flow rate of the gas transmitted through the gas supply pipe 30. This allows the regulating valve 40 to quickly, promptly, controllably, and precisely adjust the flow rate of the gas transmitted through the gas supply pipe 30. In particular, during the formation process of the battery 10, as the electrode assembly 11 expands, the required restraint force of the battery 10 increases. Based on this, the controller 50 can control the regulating valve 40 to adaptively increase the flow rate of the gas transmitted through the gas supply pipe 30, thereby increasing the internal pressure of the airbag structure 211, based on the required restraint force of the battery 10 and the detection data from the air pressure detector 60. In particular, if the gas pressure decreases due to leakage or other reasons, the controller 50 can control the regulating valve 40 to adaptively increase the flow rate of the gas transmitted through the gas supply pipe 30, based on the detection data from the air pressure detector 60, to prevent pressure from freezing. During this period, the reducer 70 can reduce the flow rate of the gas transmitted by the gas supply pipe 30 to buffer the amplitude of the air pressure change, reduce the sudden change in air pressure, and reduce the impact of the sudden change in air pressure on the airbag structure 211. Therefore, during the formation process of the battery 10, the internal air pressure of the airbag structure 211 and the pressure of the airbag structure 211 on the battery 10 can be monitored in real time, and the internal air pressure of the airbag structure 211 and the pressure of the airbag structure 211 on the battery 10 can be adjusted quickly, promptly, controllably, and accurately, thereby ensuring and improving the restraint effect of the formation system on the battery 10 during the formation of the battery 10, ensuring and improving the exhaust effect of the battery 10 during the formation, and further improving the formation effect, formation quality rate, and formation consistency, saving the time of the formation process, reducing the formation rework rate, and improving the film formation quality of the SEI film and the performance of the battery 10.

[0165] During this period, the mounting bracket 213, the limiting member 232 and the airbag structure 211 on the opposite sides of the battery 10 can form a certain limiting effect on the battery 10, which can help to ensure and improve the position stability of the battery 10 during the formation process, and reduce the risk of the probe of the formation machine being offset due to changes in the position of the battery 10, thereby improving the formation success rate and the formation quality rate, and reducing the formation rework rate.

[0166] During this period, due to the elasticity of the airbag structure 211 , the battery 10 is not easily crushed when the airbag structure 211 presses and applies pressure to the battery 10 .

[0167] When the battery 10 is formed, the gas in the airbag structure 211 can be first transmitted back to the external gas source 90 via the air supply pipe 30 to deflate the airbag structure 211, causing the airbag structure 211 to shrink. The switch valve 80 is then used to close the air supply pipe 30 to reduce the loss of gas from the external gas source 90. At this time, if the battery tray 20 is a fixed component fixed to the formation storage location, each battery 10 can be removed from the battery tray 20 to be put into other processes. If the battery tray 20 is a movable component temporarily docked at the formation storage location, the battery tray 20 can be removed together with the batteries 10 loaded thereon to be put into other processes together with the batteries 10 loaded thereon.

[0168] In summary, the formation system provided in the embodiment of the present application can be used to promote the timely discharge of gas from the battery 10 during the formation of the battery 10, and the pressurization method is simple and convenient, and less equipment is required, thereby reducing costs and reducing the space required for the entire formation system.

[0169] See also Figure 1 、 Figure 4 、 Figure 5 Some embodiments of the present application further provide a battery tray 20, which includes at least one airbag assembly 21. The airbag assembly 21 includes a plurality of elastic airbag structures 211. The plurality of airbag structures 211 of the airbag assembly 21 are spaced apart along a first direction x, and a clamping space 212 is formed between two adjacent airbag structures 211. The clamping space 212 is used to load the battery 10.

[0170] It should be noted that the battery tray 20 is a tool for loading batteries 10. The battery tray 20 includes an airbag assembly 21. Among them, one airbag assembly 21 can be provided, or multiple airbag assemblies 21 can be provided. When multiple airbag assemblies 21 are provided, the multiple airbag assemblies 21 can be arranged in rows, that is, the multiple airbag assemblies 21 can be arranged in different rows. Based on this, it is convenient to load multiple batteries 10 in an orderly manner through one or more airbag assemblies 21, thereby facilitating the simultaneous formation of multiple batteries 10 and the exhaust during the formation, which is beneficial to both ensure and improve the formation efficiency and formation effect of multiple batteries 10.

[0171] The airbag assembly 21 includes multiple airbag structures 211. These structures 211 exhibit excellent elasticity, allowing them to expand and deflate upon inflation. Specifically, the airbag structures 211 comprise hollow, flexible capsules (similar to balloons, but with enhanced elasticity). By inflating the capsules, the air can cause them to expand and resist bursting. Conversely, by releasing the air from the capsules, the capsules can be deflated, returning to their original, deflated form.

[0172] In the same airbag assembly 21, the airbag structures 211 are spaced apart along the first direction x, such that the initial gap between each two adjacent airbag structures 211 forms a clamping space 212, which can be used to load the battery 10. The airbag structures 211 can be arranged parallel to each other or at a small angle, as long as the clamping space 212 formed between two adjacent airbag structures 211 can be used to load the battery 10. The widths of the clamping spaces 212 in the first direction x can be equal or unequal. In other words, the airbag structures 211 of the airbag assembly 21 can be arranged at equal or unequal intervals.

[0173] The battery tray 20 can be a fixed component fixed to the formation storage location. In this case, the battery tray 20 is only used in the formation system. Alternatively, the battery tray 20 can be a movable component that can move and pass through the formation storage location. In this case, the battery tray 20 can be docked at the formation storage location for use in the formation system. The battery tray 20 can also be moved to other storage locations together with the batteries 10 loaded thereon for use in other systems. For example, the battery tray 20 can be moved to the liquid injection storage location together with the batteries 10 loaded thereon for use in the battery 10 liquid injection system. The battery tray 20 can be moved to the capacity separation storage location together with the batteries 10 loaded thereon for use in the battery 10 capacity separation system, and so on.

[0174] By adopting the above solution, the battery tray 20 can load the battery 10 through the clamping space 212 between the two adjacent airbag structures 211 of the airbag assembly 21, which is convenient for taking, placing, storing and even transporting the battery 10. When the battery tray 20 is used in a system such as a formation system, the battery tray 20 can also cooperate with the limited loading of the battery 10 to facilitate the formation system and other systems to perform corresponding operations on the battery 10. In particular, when the interior of the airbag structure 211 is filled with some gas, the airbag structures 211 on the opposite sides of the battery 10 can also jointly press and apply pressure to the battery 10 therebetween, so as to form a better pressing, clamping, restraining and binding effect on the battery 10, and form a certain limiting effect on the battery 10, thereby facilitating the operation of the formation system and other systems on the battery 10, and can help improve the operation effect of the formation system and other systems on the battery 10.

[0175] In addition, the battery tray 20 can also be configured with reference to the battery tray 20 in the formation system provided in any of the above embodiments, and will not be described in detail here.

[0176] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements or improvements made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. A chemical formation system, characterized in that: The formation system comprises: A battery tray, comprising at least one airbag assembly, wherein the airbag assembly comprises a plurality of elastic airbag structures, wherein the plurality of airbag structures are arranged at intervals along a first direction, and a clamping space for loading a battery is formed between two adjacent airbag structures; The air supply pipeline is connected with each of the air bag structures and is used to connect with an external air source.

2. The chemical formation system according to claim 1, characterized in that: The formation system further comprises a regulating valve arranged on the gas supply pipeline, and the regulating valve is used to adjust the pressure and / or flow of the gas transmitted by the gas supply pipeline.

3. The chemical formation system according to claim 2, characterized in that: The formation system further comprises a controller, which is connected to the regulating valve and is used to control the regulating valve.

4. The chemical formation system according to claim 3, characterized in that: The formation system further comprises an air pressure detector arranged on the air supply pipeline, wherein the air pressure detector is located between the regulating valve and the battery tray, and is used to detect the pressure of the gas transmitted by the air supply pipeline.

5. The chemical formation system according to claim 4, characterized in that: The air pressure detector is in communication connection with the controller, and the controller is used for controlling the regulating valve according to the detection data of the air pressure detector.

6. The chemical formation system according to any one of claims 2 to 5, characterized in that: The formation system further comprises a reducer arranged on the gas supply pipeline, wherein the reducer is located between the regulating valve and the battery tray, and is used to reduce the flow rate of the gas transmitted by the gas supply pipeline.

7. The chemical formation system according to any one of claims 2 to 6, characterized in that: The regulating valve includes at least one of a solenoid valve and a proportional valve.

8. The chemical formation system according to any one of claims 1 to 7, characterized in that: The formation system further comprises a switch valve arranged on the gas supply pipeline, and the switch valve is used to open or close the gas supply pipeline.

9. The chemical formation system according to any one of claims 1 to 8, characterized in that: Each of the air bag structures is connected in parallel to the air supply pipeline.

10. The chemical formation system according to any one of claims 1 to 8, characterized in that: Each of the air bag structures is connected in series to the air supply pipeline.

11. The chemical formation system according to any one of claims 1 to 10, characterized in that: The battery tray also includes a base, and the airbag assembly is mounted on the base.

12. The chemical formation system according to any one of claims 1 to 11, characterized in that: The battery tray also includes a fixing component, which is disposed corresponding to the airbag component and is used to stabilize each airbag structure of the airbag component.

13. The chemical formation system according to claim 12, characterized in that: The fixing assembly includes two fixing members and at least one limiting member, the two fixing members are arranged at intervals along the first direction, and the limiting member is extended along the first direction and connected to the two fixing members; Each of the airbag structures of the airbag assembly is arranged between the two fixing members and is connected to the limiting member.

14. The chemical formation system according to any one of claims 1 to 13, characterized in that: The airbag structure includes a frame and an airbag installed in the frame.

15. The chemical formation system according to claim 14, characterized in that: The airbag is connected to the frame by at least one of adhesion, lamination and vulcanization; And / or, the frame includes at least one of aluminum, stainless steel, and hard plastic.

16. The chemical formation system according to any one of claims 1 to 15, characterized in that: The airbag assembly further includes a mounting bracket, which is disposed corresponding to the clamping space. The mounting bracket is provided with a mounting groove, which extends along the first direction and passes through the mounting bracket.

17. The chemical formation system according to any one of claims 1 to 16, characterized in that: In the first direction, the width of the clamping space is 1 mm to 2 mm greater than the thickness of the electrode assembly of the battery loaded in the clamping space.

18. A battery tray, characterized in that: The battery tray includes at least one airbag assembly, which includes a plurality of elastic airbag structures. The plurality of airbag structures are arranged at intervals along a first direction, and a clamping space for loading batteries is formed between two adjacent airbag structures.

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