WO2025007541A1 - 化成系统及电池托盘 - Google Patents

化成系统及电池托盘 Download PDF

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Publication number
WO2025007541A1
WO2025007541A1 PCT/CN2024/072463 CN2024072463W WO2025007541A1 WO 2025007541 A1 WO2025007541 A1 WO 2025007541A1 CN 2024072463 W CN2024072463 W CN 2024072463W WO 2025007541 A1 WO2025007541 A1 WO 2025007541A1
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WO
WIPO (PCT)
Prior art keywords
battery
airbag
formation
formation system
supply pipeline
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2024/072463
Other languages
English (en)
French (fr)
Inventor
钟斌
羿庄城
汪志明
施企明
黄彩虾
马俊良
郭尔驰
魏鹏飞
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Contemporary Amperex Technology Co Ltd
Original Assignee
Contemporary Amperex Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Contemporary Amperex Technology Co Ltd filed Critical Contemporary Amperex Technology Co Ltd
Publication of WO2025007541A1 publication Critical patent/WO2025007541A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/44—Methods for charging or discharging
    • H01M10/446—Initial charging measures
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/244—Secondary casings; Racks; Suspension devices; Carrying devices; Holders characterised by their mounting method
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

Definitions

  • the embodiments of the present application relate to the field of battery production, and in particular to a formation system and a battery tray.
  • the first charge and discharge method is used to activate the active substances in the battery and form a solid electrolyte interphase (SEI) film on the surface of the active layer of the electrode.
  • SEI solid electrolyte interphase
  • This process is called battery formation. Gases are generated during the battery formation process, which will affect the quality of the SEI film, and the quality of the SEI film will affect the performance of the battery.
  • a formation system can be used to cause the gas to be discharged in a timely manner.
  • the formation system is provided with a battery tray to load the battery.
  • the formation system can clamp and press the battery through the clamping plate of the battery tray to promote gas discharge.
  • the clamping and pressurizing effect of the formation system on the battery is not good, resulting in poor exhaust effect, resulting in poor film quality and formation effect of the SEI film.
  • the embodiments of the present application provide a formation system and a battery tray, aiming to solve the problem that the existing formation system has poor clamping and pressure effect on the battery, resulting in poor exhaust effect, resulting in poor film quality of SEI film and poor formation effect.
  • a formation system comprising:
  • 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 arranged at intervals along a first direction, and forming a clamping space for loading a battery between two adjacent airbag structures;
  • the air supply pipeline is connected with each air bag structure and is used to connect with an external air source.
  • 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. It is also possible to connect the external gas source and each airbag structure 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 inflating or deflating, so that the airbag structure has a certain internal air pressure, so as to jointly press and press the battery therebetween.
  • 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.
  • 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 enabling 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 black spots and lithium precipitation on the pole piece caused by gas blocking the active ion channel, thereby ensuring and improving the film quality of the SEI film.
  • the airbag structures on the opposite sides of the batteries can form a certain limiting effect on the batteries therebetween, thereby helping to ensure and improve the position stability of the batteries 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 formation quality rate, and reducing the formation rework rate.
  • the pressurization method of the formation system is simple and convenient, and less equipment is required, thereby reducing costs and reducing the space required for the entire formation system.
  • the formation system further includes a regulating valve disposed 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.
  • the internal air pressure of the airbag structure through the regulating valve to adapt to the increase as the electrode assembly expands, so as to enhance the pressure and restraint force of each group of two adjacent airbag structures on the battery between them. 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, saving time in the formation process, reducing the formation rework rate, and improving the film formation quality of the SEI film and the performance of the battery.
  • the formation system further includes a controller, which is connected to the regulating valve and is used to control the regulating valve.
  • 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 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.
  • the formation system further includes an air pressure detector disposed on the gas supply pipeline, the air pressure detector is located between the regulating valve and the battery tray, and the air pressure detector is used to detect the pressure of the gas transmitted by the gas supply pipeline.
  • the pressure of the gas transmitted by the gas supply pipeline can be detected in real time by the air pressure detector at the gas supply pipeline portion between the regulating valve and the battery tray, so that according to the detection result of the air pressure detector, the regulating valve can be adaptively controlled manually or automatically for adjustment, so that the regulating valve can quickly, controllably and accurately adjust the pressure and/or flow of the gas transmitted by the gas supply pipeline 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 restraining 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 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.
  • the air pressure detector is connected to the controller for communicating with the air pressure detector. Data controlled regulating valve.
  • the pressure of the gas transmitted by the gas supply pipeline can be detected in real time by the air pressure detector, and the controller can quickly, timely and automatically control the regulating valve to adjust according to the detection data of the air pressure detector, so that the regulating valve can quickly, timely, controllably and accurately adjust the pressure and/or flow of the gas transmitted by the gas supply pipeline.
  • the controller can timely control the regulating valve to adjust according to the detection data of the air pressure detector, and timely increase the pressure and/or flow of the gas transmitted by the gas supply pipeline to achieve pressure foolproofing.
  • 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, timely, controllably and accurately adjusted, so as to 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 then improve the formation effect, formation rate and formation consistency, save the time consumption of the formation process, reduce the formation rework rate, and improve the film quality of the SEI film and the performance of the battery.
  • the formation system further includes a reducer disposed 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.
  • the flow rate of the gas transmitted by the gas supply pipeline can be reduced by the reducer in the gas supply pipeline portion between the regulating valve and the battery tray, 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 against the battery, and helping to protect and extend the service life of the airbag structure, the battery tray and the formation system.
  • the regulating valve includes at least one of a solenoid valve and a proportional valve.
  • 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.
  • the formation system further comprises a switch valve disposed on the gas supply pipeline, and the switch valve is used to open or close the gas supply pipeline.
  • the gas supply pipeline 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.
  • each airbag structure is connected in parallel to an air supply duct.
  • each airbag structure can be connected in parallel to the air supply pipeline so that the air supply pipeline can inflate or deflate each airbag structure at the same time, so that the internal air pressure of each airbag structure increases or decreases in the same range, and the internal air pressure of each airbag structure is basically isobaric.
  • the pressure and restraint force of the battery between the two adjacent airbag structures in each group can be basically consistent, so that the formation consistency of each battery by the formation system can be guaranteed and improved, the battery formation effect and battery formation rate can be improved, the time consumption of the formation process can be saved, and the formation rework rate can be reduced.
  • each airbag structure is connected in series to an air supply conduit.
  • each airbag structure can be connected in series to the air supply pipeline so that the air supply pipeline can inflate or deflate each airbag structure at the same time, so that the internal air pressure of each airbag structure increases or decreases with a basically consistent range, and the internal air pressure of each airbag structure is basically isobaric.
  • the pressure and restraint force of the battery between two adjacent airbag structures in each group can be basically consistent, thereby ensuring and improving the formation consistency of each battery by the formation system, improving the battery formation effect and battery formation rate, saving the time consumption of the formation process, and reducing the formation rework rate.
  • the battery tray further includes a base, and the airbag assembly is mounted on the base.
  • the battery tray can install the airbag assembly through the base to support the airbag assembly and It is helpful to stabilize the installation position and installation state of the airbag assembly, thereby ensuring that the airbag assembly can reliably play the functions of pressing and restraining, and can help to ensure and improve the performance and service life of the battery tray.
  • the battery tray further includes a fixing component, which is disposed corresponding to the airbag component and is used to stabilize each airbag structure of the airbag component.
  • the battery tray can install the airbag assembly by limiting the position of 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.
  • 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 airbag structure of the airbag assembly is arranged between two fixing members and is connected to the limiting member.
  • the fixing assembly can enclose an installation space by two fixing members arranged at intervals along the first direction x, and a limiting member extending along the first direction x and connected to the two fixing members, so as to limit the installation of the airbag assembly.
  • the fixing assembly can also reliably stabilize the relative position and relative state of each airbag structure of the airbag assembly by connecting the limiting member to each airbag structure.
  • the fixing assembly can ensure that each airbag structure of the airbag assembly can stabilize the relative position and relative state of each other, thereby ensuring that each airbag structure of the airbag assembly can reliably exert the effects of pressing and restraining the battery, which can help to ensure and improve the structural reliability and use reliability of the battery tray.
  • the limiting member when the battery is placed in the clamping space, the limiting member can form a certain limiting effect on the battery, which can help to ensure and improve the position stability of the battery during the formation process, and can reduce the risk of probe deviation 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.
  • the airbag structure includes a frame, and an airbag mounted within the frame.
  • the airbag structure can be installed and supported by the frame, and the airbag structure can be easily installed and fixed via the frame.
  • the airbag structure can also reliably exert pressure and restraint effects on the battery through the inflation and deflation of the airbag, and is not easy to crush the battery housing and the battery. In this way, the structural reliability and use reliability of the airbag structure can be guaranteed and improved.
  • the airbag is connected to the frame by at least one of adhesion, lamination, and vulcanization.
  • 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.
  • the frame comprises at least one of aluminum, stainless steel, and hard plastic.
  • the rigidity and structural strength of the frame can be guaranteed and improved, thereby ensuring and improving the supporting effect of the frame on the airbag, and ensuring and improving the structural reliability and service life of the airbag structure.
  • the airbag assembly further includes a mounting bracket, which is disposed corresponding to the clamping space, and the mounting bracket is provided with a mounting groove, which extends along the first direction and passes through the mounting bracket.
  • the battery can be installed by setting a mounting bracket in the clamping space, so as to limit the installation of the battery through the mounting slot of the mounting bracket.
  • the airbag structure on the opposite sides of the mounting slot can reliably exert the effects of pressing and restraining the battery in the mounting slot, and it is also convenient to form a reliable limiting effect on the battery through the mounting bracket during the battery formation process, so as to help ensure and improve the position stability of the battery during the formation process, and reduce the risk of the probe of the formation machine being offset due to the change of the battery position, thereby improving the formation success rate and the formation quality rate, and reducing the formation rework rate.
  • the width of the clamping space is greater than the electrode of the battery loaded in the clamping space.
  • the thickness of the component is 1 mm to 2 mm.
  • the width of the clamping space in the first direction slightly larger by 1mm to 2mm than the thickness of the electrode assembly of the battery installed in the corresponding clamping space in the first direction, it is not only convenient for the airbag structures on the opposite sides of the clamping space to reliably perform the functions of pressing and restraining the batteries in the clamping space, but also convenient for taking and placing the batteries in the clamping space, thereby improving the convenience of taking and placing the batteries from the clamping space.
  • a battery tray in a second aspect, includes at least one airbag assembly, the airbag assembly 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 a battery is formed between two adjacent airbag structures.
  • the battery tray can load the battery through the clamping space between two adjacent airbag structures of the airbag assembly, which is convenient for taking, placing, storing and even transporting the battery.
  • the battery tray can also cooperate with the limiting loading of the battery to facilitate the formation system and other systems to perform corresponding operations on the battery.
  • 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, so as to facilitate the operation of the formation system and other systems on the battery, which can be beneficial to improve the operation effect of the formation system and other systems on the battery.
  • FIG1 is an exploded schematic diagram of a battery provided in some embodiments of the present application.
  • FIG2 is a schematic diagram of the structure of an electrode assembly provided in some embodiments of the present application.
  • FIG3 is a partial schematic diagram of the electrode assembly provided in FIG2 ;
  • FIG4 is a schematic diagram of the structure of a formation system provided by some embodiments of the present application, wherein each airbag structure is connected in parallel to an air supply pipeline;
  • FIG5 is a schematic diagram of the structure of a formation system provided by other embodiments of the present application, wherein each airbag structure is connected in series to an air supply pipeline;
  • FIG6 is an exploded schematic diagram of an airbag structure, a mounting bracket, and a battery provided in some embodiments of the present application.
  • 10-battery, 11-electrode assembly 111-positive electrode sheet, 1111-positive current collector, 1112-positive active layer, 1113-positive electrode ear; 112-negative electrode sheet, 1121-negative current collector, 1122-negative active layer, 1123-negative electrode ear; 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 pipeline, 31-main pipeline, 32-first branch pipeline, 33-second branch pipeline; 40-regulating valve; 50-controller; 60-air pressure detector; 70-reducer; 80-switch valve; 90-external air source; x-first direction.
  • first and second are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as “first” or “second” may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of “plurality” is two or more, unless otherwise clearly and specifically defined.
  • the terms “installed”, “connected”, “connected”, “fixed” and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements.
  • installed can be a fixed connection, a detachable connection, or an integral connection
  • it can be a mechanical connection or an electrical connection
  • it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements.
  • the battery formation process refers to the process of activating the active substances in the battery by charging and discharging for the first time after the battery is prepared, and forming a solid electrolyte interface film (solid electrolyte interphase, referred to as SEI film, also known as passivation film) on the surface of the active layer of the electrode (usually on the surface of the negative electrode active layer).
  • SEI film solid electrolyte interphase
  • passivation film solid electrolyte interphase
  • the SEI film formed on the surface of the active layer of the electrode can prevent the active substances of the electrode from undergoing redox reactions with the electrolyte, thereby ensuring the electrochemical stability, cycle life, and self-discharge and other electrical properties of the battery.
  • 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, and the active ions cannot smoothly migrate to the active layer of the electrode, resulting in black spots and lithium precipitation on the electrode, which will affect the film quality of the SEI film, the battery formation effect, and 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.
  • 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, and the active ions cannot smoothly migrate to the active layer of the electrode, resulting in black spots and lithium precipitation on the electrode, which will affect the film quality of the SEI film, the battery formation effect, and 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
  • the relevant industries usually use a formation system to prompt the gas to be discharged from the battery in time during the battery formation.
  • 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 clamp of the battery tray to suppress the interlayer gap (GAP) of the electrode assembly of the battery, and prompt the gas generated during the battery formation process to be discharged from the battery.
  • GAP interlayer gap
  • the force applied by the clamp will diffuse and offset around 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 clamp of the formation system, resulting in poor exhaust effect, resulting in poor film quality of the SEI film and poor battery formation effect.
  • some embodiments of the present application provide a formation system, which 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.
  • the 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 to achieve inflation or deflation of the airbag structure.
  • the airbag structures on the opposite sides of the battery can adjust the internal air pressure of the airbag structure by inflation or deflation, so that the airbag structure has a certain internal air pressure to jointly press and apply pressure to the battery therebetween.
  • the surface of the airbag structure can be tightly and elastically pressed against the entire side of the battery, so that the pressure of the airbag structure on the battery can be relatively uniform.
  • the battery and the electrode assembly therein can be subjected to uniform pressure.
  • 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 enabling the gas generated during the battery formation to be discharged from the battery in a timely manner, effectively ensuring and improving the exhaust effect during the battery formation, and effectively reducing the risk of black spots and lithium precipitation on the pole piece caused by gas blocking the active ion channel, thereby ensuring and improving the film quality of the SEI film, the battery formation effect, and the battery's electrochemical stability, cycle life, self-discharge and other performance.
  • 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, etc.
  • the battery can be cylindrical, flat, rectangular or other shapes, etc.
  • the battery can be packaged in different ways to form a cylindrical battery, a square battery or a soft pack battery, etc.
  • the battery 10 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, etc.
  • the battery 10 can be cylindrical, flat, rectangular or other shapes, etc.
  • the battery 10 can be packaged in different ways to form a cylindrical battery, a square battery or a soft-pack battery, etc.
  • the battery 10 can 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 module or a battery pack.
  • 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.
  • Spacecraft include 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.
  • the battery 10 includes an electrode assembly 11 , an electrolyte (not shown in the figure), a housing 12 , an end cap 13 and other components.
  • 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.
  • the shape of the end cap 13 can be adapted to the shape of the shell 12 to match the shell 12.
  • 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 and collided, so that the battery 10 can have a higher structural strength and the safety performance can also be improved.
  • 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.
  • 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.
  • a pressure relief mechanism (not shown in the figure) for releasing the internal pressure when the internal pressure or temperature of the battery 10 reaches a threshold value can also be provided on the end cap 13.
  • 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 circuit.
  • the insulating member may be made of plastic, rubber, etc.
  • the housing 12 is a component used to cooperate with the end cap 13 to form an 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.
  • 12 and the end cap 13 can be independent components, and an opening can be set on the shell 12, and the end cap 13 is closed at the opening to form the internal environment of the battery 10.
  • the end cap 13 and the shell 12 can also be integrated. Specifically, the end cap 13 and the shell 12 can form a common connection surface before other components are put into the shell, and when the interior of the shell 12 needs to be encapsulated, the end cap 13 is closed to the shell 12.
  • the shell 12 can be of various shapes and sizes, such as a cuboid, a cylinder, a hexagonal prism, etc. Specifically, the shape of the shell 12 can be determined according to the specific shape and size of the electrode assembly 11. Among them, the material of the shell 12 can be diversified, and the shell 12 can be made of copper, iron, aluminum, stainless steel, aluminum alloy, plastic and other materials.
  • Figure 2 is a schematic diagram of the structure of the electrode assembly 11 provided in some embodiments of the present application
  • Figure 3 is a partial schematic diagram of the electrode assembly 11 provided in Figure 2.
  • the electrode assembly 11 is a component in the battery 10 where an electrochemical reaction occurs.
  • the housing 12 may include one or more electrode assemblies 11.
  • the electrode assembly 11 includes a positive electrode sheet 111, a negative electrode sheet 112, and a separator 113, and the separator 113 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 can be processed to form the electrode assembly 11 by winding, stacking, or other methods.
  • the positive electrode plate 111 includes a positive electrode current collector 1111 and a positive electrode active layer 1112.
  • the positive electrode active layer 1112 is arranged on the side of the positive electrode current collector 1111 along the thickness direction.
  • the area of the positive electrode current collector 1111 where the positive electrode active layer 1112 is not arranged can be used as a positive electrode tab 1113, and the positive electrode tab 1113 is the current output end of the positive electrode plate 111.
  • the material of the positive electrode current collector 1111 can be aluminum, etc.
  • the positive electrode active material of the positive electrode active layer 1112 can be lithium cobalt oxide, lithium iron phosphate, ternary lithium or lithium manganese oxide, etc.
  • the negative electrode sheet 112 includes a negative electrode current collector 1121 and a negative electrode active layer 1122.
  • the negative electrode active layer 1122 is arranged on the side of the negative electrode current collector 1121 along the thickness direction.
  • the area of the negative electrode current collector 1121 where the negative electrode active layer 1122 is not arranged can be used as a negative electrode tab 1123, and the negative electrode tab 1123 is the current output end of the negative electrode sheet 112.
  • the material of the negative electrode current collector 1121 can be copper, etc.
  • the negative electrode active material of the negative electrode active layer 1122 can be graphite, carbon or silicon, etc.
  • the positive electrode tab 1113 and the negative electrode tab 1123 can be located together on one side of the electrode assembly 11 or respectively on opposite sides of the electrode assembly 11.
  • the diaphragm 113 is an insulating film, which is used to separate the positive electrode sheet 111 and the negative electrode sheet 112 to prevent the negative electrode sheet 112 and the positive electrode sheet 111 from short-circuiting.
  • the diaphragm 113 has a plurality of pores, through which active ions can freely penetrate.
  • the material of the diaphragm 113 can be PP (polypropylene) or PE (polyethylene).
  • the active ions can be lithium ions, sodium ions, etc.
  • 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 difluorooxalate borate, lithium dioxalate borate, lithium difluorodioxalate phosphate, and lithium tetrafluorooxalate phosphate.
  • the solvent may include at least one of ethylene carbonate, propylene carbonate, ethyl methyl carbonate, diethyl carbonate, dimethyl carbonate, dipropyl carbonate, methyl propyl carbonate, ethyl propyl 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 sulfone, dimethyl sulfone, methyl ethyl sulfone, and diethyl sulfone.
  • the battery 10 mainly works by moving active ions between the positive electrode sheet 111 and the negative electrode sheet 112. Specifically, when the battery 10 is charged, the positive electrode sheet 111 generates active ions. The active ions provided by the positive electrode sheet 111 can penetrate the pores of the diaphragm 113, move to the negative electrode sheet 112 via the electrolyte, and embed into the negative active material of the negative electrode sheet 112. Conversely, when the battery 10 is discharged, the active ions embedded in the negative active material of the negative electrode sheet 112 are released, and the active ions released from the negative electrode sheet 112 can penetrate the pores of the diaphragm 113, move to the positive electrode sheet 111 via the electrolyte, and embed into the positive active material of the positive electrode sheet 111.
  • the battery 10 formation process refers to: after the preparation of the battery 10 is completed, the active material in the battery 10 is activated for the first time by charging and discharging, and a SEI film (not shown in the figure) is generated on the surface of the pole piece 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 generate an SEI film on the surface of the pole piece active layer (usually the negative electrode active layer 1122), and a certain amount of gas will be generated.
  • the generated SEI film can prevent the pole piece active material (usually the negative electrode active material) from undergoing an oxidation-reduction reaction with the electrolyte, thereby ensuring the electrochemical stability, cycle life, and self-discharge and other electrical properties of the battery 10.
  • 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 inability of active ions to be smoothly embedded in the active layer of the pole piece, thereby causing black spots and lithium precipitation on the pole piece, and further affecting the film 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, the formation system can be used to prompt the gas to be discharged from the battery 10 in time during the formation of the battery 10.
  • Some embodiments of the present application provide a formation system that can be used to promote timely discharge of gas from a battery 10 during formation of the battery 10 .
  • the formation system includes a battery tray 20 and an air supply pipeline 30.
  • the battery tray 20 includes at least one airbag assembly 21.
  • the airbag assembly 21 includes a plurality of elastic airbag structures 211, and the plurality of airbag structures 211 of the airbag assembly 21 are arranged at intervals along the first direction x, and a clamping space 212 is formed between two adjacent airbag structures 211, and the clamping space 212 is used to load the battery 10.
  • the air supply pipeline 30 is connected to each airbag structure 211 and is used to communicate with the external air source 90.
  • the battery tray 20 is a tool for loading batteries 10.
  • the battery tray 20 includes an airbag assembly 21.
  • one airbag assembly 21 can be provided, or multiple airbag assemblies 21 can be provided.
  • the multiple airbag assemblies 21 can be arranged in rows respectively, that is, the multiple airbag assemblies 21 can be divided into different rows.
  • 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, so as to balance and improve the formation efficiency and formation effect of multiple batteries 10.
  • the airbag assembly 21 includes a plurality of airbag structures 211.
  • the airbag structures 211 have good elasticity, and can be inflated and expanded, or deflated and shrunk.
  • the airbag structure 211 includes a hollow flexible capsule body (a bit like a balloon, but with better elasticity). By inflating the inside of the flexible capsule body, the flexible capsule body can be inflated by the gas, and the flexible capsule body is not easy to burst; conversely, by releasing the gas inside the flexible capsule body to the outside, the flexible capsule body can be deflated and restored to its original deflated shape.
  • each airbag structure 211 is arranged at intervals along the first direction x, so that the initial gap space between each two adjacent airbag structures 211 forms a clamping space 212, and the clamping space 212 can be used to load the battery 10.
  • each airbag structure 211 can be arranged in parallel with 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 equally or unequally. In other words, each airbag structure 211 of the airbag assembly 21 can be set at equal intervals or at unequal intervals.
  • the battery tray 20 may be a fixed component fixed to the formation storage location, in which case the battery tray 20 is only used in the formation system.
  • the battery tray 20 may be a movable component that can move and pass through the formation storage location, in which case the battery tray 20 may be docked at the formation storage location for use in the formation system, or may be moved together with the batteries 10 loaded thereon to other storage locations such as injection, volume separation, measurement, etc. for use in other systems.
  • the gas supply pipe 30 is a component for transmitting gas, and in particular, the inside of the gas supply pipe 30 can guide the gas flow.
  • the gas supply pipe 30 is connected to each air bag structure 211 and is connected to an external gas source 90.
  • the external gas source 90 can be, but is not limited to, an air pump, a gas storage tank, etc.
  • the driving force for driving the gas to flow in the gas supply pipe 30 can come from an external gas source 90 such as an air pump, or from other components.
  • the gas supply pipe 30 can be fixed in the formation storage position, and no matter whether the battery tray 20 is a fixed component fixed in the formation storage position, or a movable component that can move and pass through the formation storage position, the gas supply pipe 30 can be connected to each air bag structure 211 of the battery tray 20.
  • the gas supply pipe 30 can also be fixed on the battery tray 20.
  • the air supply pipe 30 can transmit the gas outputted by the external air source 90 to the inside of the airbag structure 211 to inflate the airbag structure 211, so that the airbag structure 211 gradually expands, and as the airbag structure 211 expands, the internal air pressure of the airbag structure 211 gradually increases.
  • 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, so that the airbag structure 211 gradually shrinks, and as the airbag structure 211 shrinks, the internal air pressure of the airbag structure 211 gradually decreases.
  • 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.
  • the airbag structure 211 can increase the pressure on the battery 10 by inflation, and can reduce the pressure on the battery 10 by deflation, so as to ensure that the pressure on the battery 10 can meet the exhaust requirements.
  • the airbag structure 211 has good elasticity, the surface of the airbag structure 211 can be tightly 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 pressure, clamping, restraint 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 enabling the gas generated during the formation of the battery 10 to be discharged from the battery 10 in time.
  • 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 the air supply channel to transmit gas between the external gas source 90 and each airbag structure 211, so as to inflate or deflate the airbag structure 211.
  • the airbag structures 211 on the opposite sides of the battery 10 can adjust the internal air pressure of the airbag structure 211 by inflating or deflation, so that the airbag structure 211 has a certain internal air pressure, so as to jointly press and press the battery 10 therebetween.
  • the surface of the airbag structure 211 can be tightly 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.
  • the airbag structures 211 on the opposite sides of the battery 10 can jointly form a better pressing, clamping, restraining, and binding effect on the battery 10 therebetween, and can reliably suppress the interlayer gap of the electrode assembly 11 inside the battery 10 during the formation of 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, effectively ensuring and improving the exhaust effect during the formation of the battery 10, and effectively reducing the risk of black spots and lithium precipitation on the pole piece caused by gas blocking the active ion channel, thereby ensuring and improving the film quality of the SEI film, the formation effect of the battery 10, and the electrochemical stability, cycle life, self-discharge and other performances 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 probe displacement of the formation machine due to changes in the position of the battery 10, thereby improving the formation success rate and formation quality rate, and reducing the formation rework rate.
  • the pressurization method of the formation system is simple and convenient, and less equipment is required, thereby reducing costs and reducing the space required for the entire formation system.
  • the formation system further includes a regulating valve 40 disposed 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.
  • the regulating valve 40 is a control valve, that is, a controllable valve including 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 can adjust the pressure and/or flow of the gas transmitted by the gas supply pipeline 30 (that is, it can control only the pressure, only the flow, or both the pressure and the flow), and in particular, it can control the pressure and/or flow of the gas output from at least one outlet.
  • the regulating valve 40 may be a controllable three-way valve of various types, an automatic regulating valve with an actuator (such as an electric regulating valve, etc.), or a manual regulating valve controlled manually.
  • the internal air pressure of the airbag structure 211 and the pressing force of the airbag structure 211 on the battery 10 are controllable, thereby ensuring and improving the restraining 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 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.
  • the formation system further includes a controller 50 .
  • the controller 50 is connected to the regulating valve 40 .
  • the controller 50 is used to control the regulating valve 40 .
  • controller 50 refers to a control device that can process an input signal and output a control signal.
  • the controller 50 may be, but is not limited to, a programmable logic controller (PLC), a single-chip microcomputer (Single-chip Microcomputer), a microcontroller unit (MCU), a timing program controller (such as a TPC-type timing program controller), etc.
  • PLC programmable logic controller
  • MCU microcontroller unit
  • TPC-type timing program controller timing program controller
  • the controller 50 is connected to the regulating valve 40. Specifically, the controller 50 and the regulating valve 40 may be electrically connected or signal connected, and may be wired or wirelessly connected. The controller 50 may 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.
  • 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 during the formation of the battery 10, 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.
  • the regulating valve 40 may be a manual regulating valve, and the controller 50 may be omitted.
  • the formation system further comprises a gas pressure detector 60 disposed on the gas supply pipeline 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 pipeline 30.
  • the air pressure detector 60 is a detection element capable of detecting the pressure of gas.
  • the air pressure detector 60 may be, but is not limited to, a barometer, a pressure gauge, an air pressure sensor, etc.
  • the air pressure detector 60 is disposed on the air supply pipe 30, specifically between the regulating valve 40 and the battery tray 20.
  • the air pressure detector 60 can detect the pressure of the gas transmitted by the air supply pipe 30.
  • the regulating valve 40 can be adjusted according to the detection result of the air pressure detector 60.
  • 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 at the part of the air supply pipe 30 between the regulating valve 40 and the battery tray 20, so that according to the detection result of the air pressure detector 60, the regulating valve 40 can be adaptively controlled manually or automatically for adjustment, 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 restraining effect of the formation system on the battery 10 during the formation of the battery 10, ensuring and improving the exhaust effect during the formation of the battery 10, 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
  • the air pressure detector 60 is in communication connection 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 .
  • the air pressure detector 60 is in communication connection with the controller 50, which refers to a connection mode 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.
  • 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 regulating valve 40 can be quickly, timely and automatically controlled to adjust according to the detection data of the air pressure detector 60 by the controller 50, so that the regulating valve 40 can quickly, timely, controllably and accurately adjust the pressure and/or flow of the gas transmitted by the gas supply pipeline 30.
  • the regulating valve 40 can be timely controlled to adjust according to the detection data of the air pressure detector 60 by the controller 50, so as to increase the pressure and/or flow of the gas transmitted by the gas supply pipeline 30 in time, and realize pressure foolproofing.
  • 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, 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 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.
  • 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.
  • the controller 50 can control the regulating valve 40 according to a preset program.
  • the formation system further includes a reducer 70 disposed on the gas supply pipeline 30.
  • the reducer 70 is located between the regulating valve 40 and the battery tray 20.
  • the reducer 70 is used to reduce the gas supply pipeline. The flow rate of the gas transmitted by channel 30.
  • the reducer 70 is a component that can reduce the flow rate of the gas.
  • the reducer 70 is arranged on the gas supply pipeline 30, specifically between the regulating valve 40 and the battery tray 20.
  • the reducer 70 can reduce the flow rate of the gas transmitted by the gas supply pipeline 30 to buffer the change amplitude of the gas pressure and reduce the sudden change of the gas pressure.
  • the reducer 70 can be used in the part of the gas supply pipe 30 between the regulating valve 40 and the battery tray 20 to reduce the flow rate of the gas transmitted by the gas supply pipe 30, so as to buffer the amplitude of the change of the air pressure, reduce the sudden change of the air pressure, and reduce the impact of the sudden change of the 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 ensure and extend the service life of the airbag structure 211, the battery tray 20 and the formation system.
  • the regulating valve 40 includes at least one of a solenoid valve and a proportional valve.
  • the solenoid valve is a control valve controlled by electromagnetics, which can be used to automatically adjust the direction, flow rate, speed and other parameters of the gas transmitted by the gas supply pipeline 30.
  • the solenoid valve has high control accuracy and flexibility.
  • the proportional valve is an electrically controlled control valve that can open the valve port as required and make the valve port present a desired opening, thereby controlling the flow of gas through the gas supply pipeline 30.
  • the proportional valve can achieve continuous control and proportional control.
  • 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.
  • the regulating valve 40 may be other types of control valves.
  • the formation system further includes a switch valve 80 disposed on the gas supply pipeline 30 .
  • the switch valve 80 is used to open or close the gas supply pipeline 30 .
  • 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 pipeline 30 and can be provided at any position of the gas supply pipeline 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 pipeline 30.
  • gas can be allowed to flow along the gas supply pipeline 30, especially allowing gas to pass through the switch valve 80.
  • the switch valve 80 closes the gas supply pipeline 30, gas can be prevented from flowing along the gas supply pipeline 30, especially preventing gas from passing through the switch valve 80.
  • 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 controlled manually.
  • 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.
  • each airbag structure 211 is connected in parallel to the air supply pipeline 30 .
  • the airbag structures 211 are arranged in parallel and are all connected to the air supply pipeline 30.
  • the air supply pipeline 30 includes a main pipeline 31 and a plurality of first branch pipelines 32, each of which is connected to the main pipeline 31 in parallel, and each of the first branch pipelines 32 is connected to each of the airbag structures 211 in one-to-one correspondence.
  • 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 at the same time, so that the internal air pressure of each airbag structure 211 increases or decreases at the same range, so that the internal air pressure of each airbag structure 211 is basically isobaric.
  • each group of two adjacent airbag structures can be made to The pressure and restraint force of the bag structure 211 on the batteries 10 therebetween are basically consistent, thereby ensuring and improving the formation consistency of the formation system on each battery 10, improving the formation effect and formation quality rate of the batteries 10, saving time in the formation process, and reducing the formation rework rate.
  • each airbag structure 211 is connected in series to the air supply pipeline 30 .
  • the airbag structures 211 are arranged in series and are ultimately connected to the air supply pipeline 30.
  • the air supply pipeline 30 includes a main pipeline 31 and a plurality of second branch pipelines 33, and each group of two adjacent airbag structures 211 is connected through the second branch pipeline 33, and an airbag structure 211 at the head or end of the series relationship is connected to the main pipeline 31 through the second branch pipeline 33.
  • 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 at the same time, so that the internal air pressure of each airbag structure 211 is basically the same, and the internal air pressure of each airbag structure 211 is basically isobaric.
  • the pressure and restraint force of the two adjacent airbag structures 211 in each group on the battery 10 therebetween can be basically the same, so that the formation system can ensure and improve the formation consistency of each battery 10, improve the formation effect and the formation rate of the battery 10, save the time of the formation process, and reduce the formation rework rate.
  • each airbag structure 211 may be connected in parallel to the air supply pipe 30.
  • Parallel connection refers to both series connection and parallel connection.
  • the battery tray 20 further includes a base 22 , and the airbag assembly 21 is installed on the base 22 .
  • the battery tray 20 includes a base 22, which is a rigid component for mounting and supporting the airbag assembly 21.
  • the base 22 may be in the shape of a plate but is not limited to being in the shape of a plate.
  • the airbag assembly 21 is mounted on the base 22, wherein the connection between the airbag assembly 21 and the base 22 may be a detachable connection or a fixed connection.
  • 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 perform the functions of pressing and restraining, which can help to ensure and improve the performance and service life of the battery tray 20.
  • the battery tray 20 further includes a fixing component 23 .
  • the fixing component 23 is disposed corresponding to the airbag component 21 .
  • the fixing component 23 is used to stabilize each airbag structure 211 of the airbag component 21 .
  • the battery tray 20 includes a fixing assembly 23, which is arranged in equal quantities and one-to-one with the airbag assembly 21.
  • the fixing assembly 23 is a component used to stabilize the airbag structures 211 of the airbag assembly 21, and is specifically used to stabilize the relative position and relative state of the airbag structures 211 of the airbag assembly 21.
  • the battery tray 20 can install the airbag assembly 21 in a limited position 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.
  • the fixing assembly 23 includes two fixing members 231 and at least one stopper 232.
  • the two fixing members 231 are arranged at intervals along the first direction x.
  • the stopper 232 is extended along the first direction x and 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 connected to the stopper 232.
  • the fixing assembly 23 includes a fixing member 231 and a limiting member 232.
  • Two fixing members 231 are provided, and the fixing members 231 may be in the shape of a plate but are not limited to being plate-shaped.
  • the two fixing members 231 are arranged at intervals along the first direction x, wherein the two fixing members 231 are arranged at intervals along the first direction x.
  • the parts 231 can be arranged parallel to each other or at a small angle.
  • One or more limiters 232 can be provided, and the limiters 232 can be in the shape of a rod but are not limited to the shape of a rod.
  • the limiters 232 are extended along the first direction x, and the two opposite ends of the limiters 232 are respectively connected to two fixing parts 231. Based on this, the fixing assembly 23 can enclose an installation space through the fixing parts 231 and the limiters 232, so that the airbag assembly 21 can be installed in the installation space with a limited position.
  • each airbag structure 211 of the airbag assembly 21 is also connected to the limiting member 232 to stabilize the relative position and relative state between each airbag structure 211.
  • the connection between the airbag structure 211 and the limiting member 232 can be a detachable connection or a fixed connection.
  • the fixing assembly 23 can enclose an installation space through two fixing members 231 arranged at intervals 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 with each airbag structure 211.
  • 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 the effects of pressing and restraining the battery 10, which can help to ensure and improve the structural reliability and use reliability of the battery tray 20.
  • 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.
  • the airbag structure 211 includes a frame 2111 and an airbag 2112 installed in the frame 2111 .
  • 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, and the frame 2111 may be, but is not limited to, a rectangular frame 2111.
  • the airbag 2112 is a hollow flexible capsule body (a bit like a balloon, but with better elasticity), and the airbag 2112 may be made of any recoverable elastic material with better elasticity.
  • the airbag 2112 can be inflated and swelled, and can be deflated and shrunk, so as to exert the effects of pressing and restraining the battery 10.
  • the airbag 2112 is installed in the frame 2111 and is connected and fixed to the frame 2111.
  • the connection method between the airbag 2112 and the frame 2111 is not limited.
  • the airbag structure 211 can be installed and supported by the frame 2111, and the airbag 2112 can be easily installed and fixed via the frame 2111.
  • the airbag structure 211 can also reliably exert the functions of pressing and restraining the battery 10 through the inflation and deflation of the airbag 2112, and is not easy to crush the housing 12 of the battery 10 and the battery 10. Therefore, the structural reliability and use reliability of the airbag structure 211 can be guaranteed and improved.
  • the airbag 2112 is connected to the frame 2111 by at least one of adhesion, lamination, and vulcanization.
  • 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).
  • 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.
  • connection methods may be used between the airbag 2112 and the frame 2111.
  • the frame 2111 includes aluminum, stainless steel, hard plastic, or One less.
  • the frame 2111 can be made of at least one of aluminum, stainless steel, and hard plastic.
  • the stainless steel can be, but is not limited to, 304 stainless steel.
  • the hard plastic can be, but is not limited to, ABS (Acrylonitrile Butadiene Styrene plastic), POM (Polyoxymethylene, polyoxymethylene resin), PS (polystyrene, polystyrene plastic), PMMA (Polymethyl methacrylate, organic glass), PC (Polycarbonate, polycarbonate), PET (Polyethylene terephthalate, polyethylene terephthalate plastic), etc.
  • 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.
  • the airbag assembly 21 also includes a mounting bracket 213, which is correspondingly arranged in the clamping space 212.
  • 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.
  • the airbag assembly 21 includes a mounting bracket 213.
  • the mounting bracket 213 is arranged corresponding to the clamping space 212, and specifically, the mounting bracket 213 is installed in the clamping space 212.
  • the mounting bracket 213 is provided with a mounting groove 2131, which can facilitate the battery 10 to be installed in the mounting groove 2131 through the notch of the mounting groove 2131.
  • the mounting groove 2131 extends along the first direction x and passes through the mounting bracket 213, which can facilitate the airbag structure 211 on the opposite sides of the mounting groove 2131 to play a role in pressing and restraining the battery 10 in the mounting groove 2131.
  • the mounting bracket 213 can be arranged in the clamping space 212, so as to limit the installation of the battery 10 through the mounting groove 2131 of the mounting bracket 213. Based on this, it is convenient for the airbag structure 211 on the opposite sides of the mounting groove 2131 to reliably exert the effects of pressing and restraining the battery 10 in the mounting groove 2131, and it is also convenient to form a reliable limiting effect on the battery 10 through the mounting bracket 213 during the formation process of the battery 10, so as to help 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 the change in the position of the battery 10, so as to improve the formation success rate and the formation quality rate, and reduce the formation rework rate.
  • the width d of the clamping space 212 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 installed in the corresponding clamping space 212 in the first direction x by 1 mm to 2 mm.
  • 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 perform the functions of pressing and restraining the battery 10 in the clamping space 212, but also convenient for taking and placing the battery 10 in the clamping space 212, thereby improving the convenience of taking the battery 10 out of the clamping space 212.
  • FIG. 4 Please refer to FIG. 4 , FIG. 5 , and FIG. 6 .
  • the present application provides a specific example of a chemical formation system.
  • 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 arranged on the base 22.
  • the fixing assembly 23 and the airbag assembly 21 are arranged correspondingly.
  • the fixing assembly 23 includes a fixing member 231 and a limiting member 232.
  • Two fixing members 231 are provided, and the fixing members 231 are plate-shaped and vertically arranged on the base 22.
  • the two fixing members 231 are arranged at intervals along the first direction x and are arranged parallel to each other.
  • a plurality of limiting members 232 are provided, and the limiting members 232 are rod-shaped and extend along the first direction x, and the opposite ends of the limiting members 232 connect the two fixing members 231.
  • the fixing members 231 and the limiting members 232 of the fixing assembly 23 can be enclosed together to form an installation space for limiting the installation of the airbag assembly 21.
  • the airbag assembly 21 is installed in the installation space.
  • the airbag assembly 21 includes a plurality of airbags each erected on a 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 swelled, and can be deflated and shrunk.
  • Multiple 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 limiter 232 to stabilize the relative position and relative state between the airbag structures 211 of 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 set 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.
  • the formation system further includes an air supply pipeline 30.
  • the air supply pipeline 30 is in communication with each air bag structure 211.
  • One end of the air supply pipeline 30 away from the battery tray 20 is in communication with an external air source 90.
  • the formation system also includes a gas pressure detector 60, a switch valve 80, a reducer 70, a regulating valve 40 and a controller 50.
  • the gas pressure detector 60, the switch valve 80, the reducer 70, and the regulating valve 40 are all arranged on the gas supply pipeline 30, and are arranged in sequence along the direction close to the external gas source 90.
  • the switch valve 80 is used to open or close the gas supply pipeline 30.
  • the gas pressure detector 60 and the regulating valve 40 are both connected to the controller 50 for communication.
  • the gas 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 according to the detection data of the gas 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, so as to buffer the change amplitude of the gas pressure and reduce the sudden change of the gas pressure.
  • the switch valve 80 can be first opened to the gas supply pipe 30, and then the gas output from the external gas source 90 is transmitted to the inside of the airbag structure 211 through the gas supply pipe 30 to inflate the airbag structure 211, so that the airbag structure 211 is expanded.
  • the two adjacent inflated airbag structures 211 can cooperate and jointly press the battery 10 in the clamping space 212 therebetween, and based on the elasticity of the airbag structure 211 itself, the surface of the airbag structure 211 can be tightly 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.
  • the battery 10 can be pressed, clamped, restrained and bounded to form a better effect, so that the interlayer gap of the electrode assembly 11 (as shown in FIG.
  • the battery 10 can be reliably suppressed during the formation process of the battery 10, and the gas generated during the formation of the battery 10 can be discharged from the battery 10 in time.
  • the exhaust can be promoted, the exhaust effect during the formation of the battery 10 can be guaranteed and improved, and the risk of black spots and lithium precipitation on the pole piece caused by the gas blocking the active ion channel can be reduced, thereby ensuring and improving the film quality of the SEI film, the formation effect of the battery 10, and the electrochemical stability, cycle life, self-discharge and other performances of the battery 10.
  • the air pressure detector 60 can detect the pressure of the gas transmitted by the gas supply pipeline 30 in real time, and transmit the detection data to the controller 50. According to the detection data of the air pressure detector 60, when the pressure of the gas does not meet the requirements, the controller 50 can quickly, timely and automatically control the regulating valve 40 to adjust, so that the regulating valve 40 can quickly, timely, controllably and accurately adjust the flow of the gas transmitted by the gas supply pipeline 30. In particular, during the formation process of the battery 10, as the electrode assembly 11 expands, the binding force required by the battery 10 increases.
  • the controller 50 can control the regulating valve 40 to adaptively increase the flow of the gas transmitted by the gas supply pipeline 30 according to the binding force required by the battery 10 and the detection data of the air pressure detector 60, so as to increase the internal air pressure of the airbag structure 211.
  • the controller 50 can control the regulating valve 40 to adaptively increase the flow of the gas transmitted by the gas supply pipeline 30 according to the detection data of the air pressure detector 60, so as to prevent pressure from being fooled.
  • the reducer 70 can reduce the flow rate of the gas transmitted by the gas supply pipe 30 to buffer the change of air pressure, reduce the sudden change of air pressure, and reduce the impact of the sudden change of 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 pressure of the airbag structure 211 on the battery 10 can be adjusted quickly, timely, controllably, and accurately, thereby ensuring and improving the restraint of the battery 10 by the formation system during the formation of the battery 10. The effect can ensure and improve the exhaust effect during the formation of the battery 10, thereby 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 quality of the SEI film and the performance of the battery 10.
  • 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 can reduce the risk of probe deviation of the formation machine 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.
  • the gas in the airbag structure 211 can be first transmitted back to the external gas source 90 through the gas supply pipe 30 to deflate the airbag structure 211, so that the airbag structure 211 shrinks. Then the switch valve 80 closes the gas supply pipe 30 to reduce the loss of gas from the external gas source 90.
  • the battery tray 20 is a fixed component fixed to the formation storage position, each battery 10 can be removed from the battery tray 20 to put each battery 10 into other processes. If the battery tray 20 is a movable component temporarily docked at the formation storage position, the battery tray 20 can be removed together with the batteries 10 loaded thereon, so that the battery tray 20 together with the batteries 10 loaded thereon can be put into other processes.
  • 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.
  • 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 , wherein the plurality of airbag structures 211 of the airbag assembly 21 are arranged at intervals along a first direction x, and a clamping space 212 is formed between two adjacent airbag structures 211 , and the clamping space 212 is used to load the battery 10 .
  • the battery tray 20 is a tool for loading the batteries 10.
  • the battery tray 20 includes an airbag assembly 21.
  • one airbag assembly 21 can be provided, or multiple airbag assemblies 21 can be provided.
  • the multiple airbag assemblies 21 can be arranged in rows respectively, 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, so as to facilitate the simultaneous formation of multiple batteries 10 and the exhaust during the formation, so as to help to balance and improve the formation efficiency and formation effect of multiple batteries 10.
  • the airbag assembly 21 includes a plurality of airbag structures 211.
  • the airbag structures 211 have good elasticity, and can be inflated and expanded, or deflated and shrunk.
  • the airbag structure 211 includes a hollow flexible capsule body (a bit like a balloon, but with better elasticity). By inflating the inside of the flexible capsule body, the flexible capsule body can be inflated by the gas, and the flexible capsule body is not easy to burst; conversely, by releasing the gas inside the flexible capsule body to the outside, the flexible capsule body can be deflated and restored to its original deflated shape.
  • each airbag structure 211 is arranged at intervals along the first direction x, so that the initial gap space between each two adjacent airbag structures 211 forms a clamping space 212, and the clamping space 212 can be used to load the battery 10.
  • each airbag structure 211 can be arranged in parallel with 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 of each clamping space 212 in the first direction x can be set equally or unequally. In other words, each airbag structure 211 of the airbag assembly 21 can be set at equal intervals or at unequal intervals.
  • the battery tray 20 may be a fixed component fixed to the formation storage location, in which case the battery tray 20 is only used in the formation system.
  • the battery tray 20 may be a movable component that can move and pass through the formation storage location, in which case, The battery tray 20 can be docked at a formation storage location for use in a formation system.
  • the battery tray 20 can also be moved together with the batteries 10 loaded thereon to other storage locations for use in other systems.
  • the battery tray 20 can be moved together with the batteries 10 loaded thereon to a liquid filling storage location for use in a battery 10 liquid filling system.
  • the battery tray 20 can be moved together with the batteries 10 loaded thereon to a capacity separation storage location for use in a battery 10 capacity separation system, and so on.
  • 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.
  • the battery tray 20 can also cooperate with the limited loading of the battery 10, so that the formation system and other systems can perform corresponding operations on the battery 10.
  • 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, so as to facilitate the operation of the formation system and other systems on the battery 10, which can be beneficial to improve the operation effect of the formation system and other systems on the battery 10.
  • the battery tray 20 may also be configured with reference to the battery tray 20 in the formation system provided in any of the above embodiments, which will not be described in detail herein.

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Abstract

本申请涉及电池生产领域,提供一种化成系统及电池托盘(20)。化成系统包括电池托盘(20)和供气管道(30)。电池托盘(20)包括气囊组件(21)。气囊组件(21)包括多个气囊结构(211),多个气囊结构(211)沿第一方向(x)间隔布置,并于相邻两个气囊结构(211)之间形成夹持空间(212)。供气管道(30)与各气囊结构(211)连通。基于此,在电池(10)置于夹持空间(212)且电池(10)化成时,处于电池(10)两侧的气囊结构(211)可共同对电池(10)形成夹持、束缚,可促使电池(10)化成所产生的气体及时从电池(10)排出,可提高排气效果、SEI膜的成膜质量、电池(10)化成效果。

Description

化成系统及电池托盘
相关申请的交叉引用
本申请要求于2023年07月05日在中华人民共和国国家知识产权局提交的、申请号为202310823448.2、发明名称为“化成系统及电池托盘”的中国专利申请的优先权,其全部内容通过引用结合在本申请中。
技术领域
本申请实施方式涉及电池生产领域,尤其涉及一种化成系统及电池托盘。
背景技术
在电池制备完成后,首次采用充放电方式让电池内的活性物质激活,并在极片活性层表面生成一种固体电解质界面膜(solid electrolyte interphase,简称SEI膜),这个过程称为电池化成。电池化成过程中会产生气体,这些气体会影响SEI膜的成膜质量,而SEI膜的成膜质量则会影响电池的性能。对此,可使用化成系统促使气体及时排出。
在一些情形下,化成系统会设置电池托盘,以装载电池。且化成系统可通过电池托盘的夹板对电池进行夹持和施压,以促使气体排出。然而,该化成系统对电池的夹持和施压的效果不佳,导致排气效果不佳,致使SEI膜的成膜质量及化成效果不佳。
申请内容
本申请实施例提供一种化成系统及电池托盘,旨在解决现有化成系统对电池的夹持和施压的效果不佳,导致排气效果不佳,致使SEI膜的成膜质量及化成效果不佳的问题。
为实现上述目的,本申请实施例采用的技术方案是:
第一方面,提供了一种化成系统,化成系统包括:
电池托盘,包括至少一个气囊组件,气囊组件包括多个具有弹性的气囊结构,多个气囊结构沿第一方向间隔布置,并于相邻两个气囊结构之间形成用于装载电池的夹持空间;
供气管道,与各气囊结构连通,并用于与外部气源连通。
本申请实施例提供的化成系统,可通过电池托盘装载电池,尤其可通过气囊组件的相邻两个气囊结构之间的夹持空间装载电池。还可通过供气通道连通外部气源和各气囊结构,以在外部气源和各气囊结构之间传输气体,而实现对气囊结构进行充气或泄气。基于此,在电池置于夹持空间中且电池化成时,处于电池相对两侧的气囊结构可通过充气或泄气,调整气囊结构的内部气压,使得气囊结构具有一定的内部气压,以共同对处于其间的电池进行抵压、施压。期间,基于气囊结构自身的弹性,气囊结构的表面可紧密地弹性抵压电池的整个侧面,使得气囊结构对电池的压力可相对均匀地分布在电池的整个侧面,使得电池及其内的电极组件可受到均匀的压力。由此,处于电池相对两侧的气囊结构,能够共同对处于其间的电池形成较佳的抵压、夹持、约束、束缚的效果,能够在电池化成期间可靠地抑制电池内部的电极组件的层间间隙,从而可有效促使电池化成期间所产生的气体能够及时从电池内排出,可有效保障并提高电池化成期间的排气效果,可有效降低气体阻碍活性离子通道而导致极片产生黑斑、析锂等问题的风险,从而可保障并提高SEI膜的成膜质 量、电池化成效果,以及电池的电化学稳定性、循环寿命、自放电等性能。
并且,由于电池被对应置于夹持空间中,在电池化成过程中,处于电池相对两侧的气囊结构可对处于其间的电池形成一定的限位效果,从而可利于保障并提高电池在化成过程中的位置稳定性,可降低因电池位置发生变化而导致化成机的探针出现偏移的风险,从而可提高化成成功率、化成优率,可降低化成返工率。
并且,基于气囊结构自身的弹性,气囊结构对电池进行抵压、施压时,还不易压溃电池壳体及电池。
并且,该化成系统的加压方式简单、方便,所需涉及的设备较少,从而可降低成本,可减少整个化成系统所需占用的空间。
在一些实施例中,化成系统还包括设于供气管道上的调节阀,调节阀用于调节供气管道传输的气体的压力和/或流量。
通过采用上述方案,可便于在电池化成过程中,通过调节阀快速、简便地调节供气管道传输的气体的压力和/或流量,而方便、快捷、可靠地调节气囊结构的充气或泄气的幅度,从而可方便、快捷、可靠地调节气囊结构的内部气压,可调节各组相邻两个气囊结构对其间的电池的抵压力、束缚力。尤其,在电池化成过程中,随着电极组件的膨胀,电池所需束缚力增加,基于本实施例的设置,可便于随着电极组件的膨胀,通过调节阀控制气囊结构的内部气压适应增加,以增强各组相邻两个气囊结构对其间的电池的抵压力、束缚力。由此,即可基于调节阀,使得气囊结构的内部气压以及气囊结构对电池的抵压力均具有可控性,从而可保障并提高化成系统在电池化成期间对电池的束缚效果,可保障并提高电池化成期间的排气效果,进而可提高电池化成效果和电池化成优率,可节省化成工序耗时,可降低化成返工率,可提高SEI膜的成膜质量及电池的性能。
在一些实施例中,化成系统还包括控制器,控制器与调节阀连接,控制器用于控制调节阀。
通过采用上述方案,可便于在电池化成过程中,通过控制器自动化控制调节阀,以使调节阀能够快速、自动、可控地调节供气管道传输的气体的压力和/或流量,从而可快速、可靠、自动、可控地实现调节气囊结构的内部气压以及气囊结构对电池的抵压力,从而可保障并提高化成系统在电池化成期间对电池的束缚效果,可保障并提高电池化成期间的排气效果,进而可提高化成效果、化成优率和化成一致性,可节省化成工序耗时,可降低化成返工率,可提高SEI膜的成膜质量及电池的性能。
在一些实施例中,化成系统还包括设于供气管道上的气压检测器,气压检测器处于调节阀和电池托盘之间,气压检测器用于检测供气管道传输的气体的压力。
通过采用上述方案,在电池化成过程中,可通过气压检测器在调节阀和电池托盘之间的供气管道部分,实时检测供气管道传输的气体的压力,以便于根据气压检测器的检测结果,适应性手动或自动地控制调节阀进行调节,以使调节阀能够根据需要快速、可控、精准地调节供气管道传输的气体的压力和/或流量,从而可在电池化成过程中,快速、可控、及时、精准地调节气囊结构的内部气压以及气囊结构对电池的抵压力,从而可保障并提高化成系统在电池化成期间对电池的束缚效果,可保障并提高电池化成期间的排气效果,进而可提高化成效果、化成优率和化成一致性,可节省化成工序耗时,可降低化成返工率,可提高SEI膜的成膜质量及电池的性能。
在一些实施例中,气压检测器与控制器通信连接,控制器用于根据气压检测器的检测 数据控制调节阀。
通过采用上述方案,可通过气压检测器实时检测供气管道传输的气体的压力,并通过控制器根据气压检测器的检测数据,快速、及时、自动化地控制调节阀进行调节,以使调节阀能够快速、及时、可控、精准地调节供气管道传输的气体的压力和/或流量。尤其,在气体的压力因漏气等原因减小时,可通过控制器根据气压检测器的检测数据,及时控制调节阀进行调节,及时增加供气管道传输的气体的压力和/或流量,实现压力防呆。由此,即可在电池化成过程中,实时监测,并快速、及时、可控、精准地调节气囊结构的内部气压以及气囊结构对电池的抵压力,从而可保障并提高化成系统在电池化成期间对电池的束缚效果,可保障并提高电池化成期间的排气效果,进而可提高化成效果、化成优率和化成一致性,可节省化成工序耗时,可降低化成返工率,可提高SEI膜的成膜质量及电池的性能。
在一些实施例中,化成系统还包括设于供气管道上的减速器,减速器处于调节阀和电池托盘之间,减速器用于降低供气管道传输的气体的流速。
通过采用上述方案,在电池化成过程中,尤其在调节阀调节供气管道传输的气体的压力和/或流量的期间,可通过减速器在调节阀和电池托盘之间的供气管道部分,降低供气管道传输的气体的流速,以缓冲气压的变化幅度,减少气压突变,减少气压突变对气囊结构的冲击,从而可利于精准地调节气囊结构的内部气压以及气囊结构对电池的抵压力,并利于保障并延长气囊结构、电池托盘及化成系统的使用寿命。
在一些实施例中,调节阀包括电磁阀、比例阀中的至少一种。
通过采用上述方案,可通过使调节阀为电磁阀或比例阀,以便于调节阀精准调节供气管道传输的气体的流量,而有效提高对气囊结构的内部气压及气囊结构对电池的抵压力的调节便利性和调节精度。
在一些实施例中,化成系统还包括设于供气管道上的开关阀,开关阀用于打开或关闭供气管道。
通过采用上述方案,可在化成系统作业时,通过开关阀打开供气管道,以允许对气囊结构进行充气或泄气。反之,可在化成系统待业时,通过开关阀关闭供气管道,以减少外部气源的气体的损耗。
在一些实施例中,各气囊结构并联连通至供气管道。
通过采用上述方案,可通过使各气囊结构并联连通至供气管道,以使得供气管道能够一并对各气囊结构进行充气或泄气,使得各气囊结构的内部气压增减变化幅度一致,使得各气囊结构的内部气压基本等压。基于此,可促使各组相邻两个气囊结构对其间的电池的抵压力、束缚力基本一致,从而可保障并提高化成系统对各电池的化成一致性,可提高电池化成效果和电池化成优率,可节省化成工序耗时,可降低化成返工率。
在一些实施例中,各气囊结构串联连通至供气管道。
通过采用上述方案,可通过使各气囊结构串联连通至供气管道,以使得供气管道能够一并对各气囊结构进行充气或泄气,使得各气囊结构的内部气压增减变化幅度基本一致,使得各气囊结构的内部气压基本等压。基于此,可促使各组相邻两个气囊结构对其间的电池的抵压力、束缚力基本一致,从而可保障并提高化成系统对各电池的化成一致性,可提高电池化成效果和电池化成优率,可节省化成工序耗时,可降低化成返工率。
在一些实施例中,电池托盘还包括基座,气囊组件安装于基座上。
通过采用上述方案,电池托盘可通过基座安装气囊组件,以对气囊组件进行支撑,并 利于稳定气囊组件的安装位置和安装状态,从而可保障气囊组件能够可靠地发挥抵压、束缚等效用,可利于保障并提高电池托盘的使用性能和使用寿命。
在一些实施例中,电池托盘还包括固定组件,固定组件与气囊组件对应设置,固定组件用于稳固气囊组件的各气囊结构。
通过采用上述方案,电池托盘可通过固定组件限位安装气囊组件,尤其稳固气囊组件的各气囊结构的相对位置和相对状态,从而可保障气囊组件的各气囊结构能够分别可靠地对电池发挥抵压、束缚等效用,可利于保障并提高电池托盘的结构可靠性和使用可靠性。
在一些实施例中,固定组件包括两个固定件和至少一个限位件,两个固定件沿第一方向间隔布置,限位件沿第一方向延伸设置,并连接于两个固定件;
气囊组件的各气囊结构设于两个固定件之间,并均连接至限位件。
通过采用上述方案,固定组件可通过沿第一方向x间隔布置的两个固定件,以及沿第一方向x延伸设置并连接于两个固定件的限位件,共同围合出安装空间,以限位安装气囊组件。固定组件还可通过使限位件与各气囊结构连接,以可靠稳固气囊组件的各气囊结构的相对位置和相对状态。由此,固定组件即可保障气囊组件的各气囊结构能够稳固彼此的相对位置和相对状态,从而可保障气囊组件的各气囊结构能够分别可靠地对电池发挥抵压、束缚等效用,可利于保障并提高电池托盘的结构可靠性和使用可靠性。
通过采用上述方案,在电池被对应置于夹持空间中时,限位件可对电池形成一定的限位效果,从而可利于保障并提高电池在化成过程中的位置稳定性,可降低因电池位置发生变化而导致化成机的探针出现偏移的风险,从而可提高化成成功率、化成优率,可降低化成返工率。
在一些实施例中,气囊结构包括框架,以及安装于框架内的气囊。
通过采用上述方案,气囊结构可通过框架安装并支撑气囊,且便于经由框架实现气囊结构整体的安装固定。气囊结构还可通过气囊的充气鼓胀、泄气缩瘪,可靠地对电池发挥抵压、束缚等效用,且不易压溃电池壳体及电池。由此,可保障并提高气囊结构的结构可靠性和使用可靠性。
在一些实施例中,气囊通过粘连、压合、硫化中的至少一种方式与框架连接。
通过采用上述方案,气囊可通过粘连、压合、硫化中的至少一种方式与框架连接固定,基于此,可保障并提高气囊与框架之间的连接稳固性和连接密封性,从而可保障并提高气囊结构的结构可靠性和使用可靠性,可降低气囊脱落的风险。
在一些实施例中,框架包括铝、不锈钢、硬质塑料中的至少一种。
通过采用上述方案,可保障并提高框架的刚度和结构强度,从而可保障并提高框架对气囊的支撑效用,可保障并提高气囊结构的结构可靠性和使用寿命。
在一些实施例中,气囊组件还包括安装支架,安装支架对应设置于夹持空间,安装支架设有安装槽,安装槽沿第一方向延伸并贯通安装支架。
通过采用上述方案,可通过在夹持空间中设置安装支架,以通过安装支架的安装槽限位安装电池。基于此,可便于安装槽相对两侧的气囊结构对安装槽中的电池可靠地发挥抵压、束缚等效用,且还便于在电池化成过程中,通过安装支架对电池形成可靠的限位效果,从而可利于保障并提高电池在化成过程中的位置稳定性,可降低因电池位置发生变化而导致化成机的探针出现偏移的风险,从而可提高化成成功率、化成优率,可降低化成返工率。
在一些实施例中,在第一方向上,夹持空间的宽度比装载于夹持空间内的电池的电极 组件的厚度大1毫米(mm)~2mm。
通过采用上述方案,通过使夹持空间在第一方向上的宽度,比对应夹持空间内安装的电池的电极组件在第一方向上的厚度略大1mm~2mm,不仅便于夹持空间相对两侧的气囊结构对夹持空间中的电池可靠地发挥抵压、束缚等效用,且还便于将电池取放安装于夹持空间,从而可利于提高电池从夹持空间的取放便利性。
第二方面,提供了一种电池托盘,电池托盘包括至少一个气囊组件,气囊组件包括多个具有弹性的气囊结构,多个气囊结构沿第一方向间隔布置,并于相邻两个气囊结构之间形成用于装载电池的夹持空间。
通过采用上述方案,电池托盘可通过气囊组件的相邻两个气囊结构之间的夹持空间装载电池,便于电池的取放、存储甚至转运。当电池托盘用于化成系统等系统时,电池托盘还可配合限位装载电池,以便于化成系统等系统对电池进行相应作业。尤其,当气囊结构的内部被充有一些气体时,处于电池相对两侧的气囊结构还可共同对处于其间的电池进行抵压、施压,以对电池形成较佳的抵压、夹持、约束、束缚的效果,并对电池形成一定的限位效果,从而可便于配合化成系统等系统对电池的作业,可利于提高化成系统等系统对电池的作业效果。
附图说明
为了清楚地说明本申请实施例中的技术方案,下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍,显而易见地,下面描述中的附图仅仅是本申请的一些实施例,对于本领域普通技术人员来讲,在不付出创造性劳动性的前提下,还可以根据这些附图获得其他的附图。
图1为本申请一些实施例提供的电池的分解示意图;
图2为本申请一些实施例提供的电极组件的结构示意图;
图3为图2提供的电极组件的局部示意图;
图4为本申请一些实施例提供的化成系统的结构示意图,其中,各气囊结构并联连通至供气管道;
图5为本申请另一些实施例提供的化成系统的结构示意图,其中,各气囊结构串联连通至供气管道;
图6为本申请一些实施例提供的气囊结构、安装支架和电池的分解示意图。
其中,图中各附图标记:
10-电池,11-电极组件,111-正极极片,1111-正极集流体,1112-正极活性层,1113-正极极耳;112-负极极片,1121-负极集流体,1122-负极活性层,1123-负极极耳;113-隔膜;12-壳体,13-端盖,14-电极端子;20-电池托盘,21-气囊组件,211-气囊结构,2111-框架,2112-气囊,212-夹持空间,213-安装支架,2131-安装槽;22-基座,23-固定组件,231-固定件,232-限位件;30-供气管道,31-主管道,32-第一分管道,33-第二分管道;40-调节阀;50-控制器;60-气压检测器;70-减速器;80-开关阀;90-外部气源;x-第一方向。
具体实施方式
为了使本申请所要解决的技术问题、技术方案及有益效果清楚明白,以下结合附图及实施例,对本申请进行详细说明。应当理解,此处所描述的具体实施例仅仅用以解释本申 请,并不用于限定本申请。
在本申请的描述中,需要理解的是,术语“长度”、“宽度”、“上”、“下”、“前”、“后”、“左”、“右”、“竖直”、“水平”、“顶”、“底”“内”、“外”等指示的方位或位置关系为基于附图所示的方位或位置关系,仅是为了便于描述本申请和简化描述,而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作,因此不能理解为对本申请的限制。
此外,术语“第一”、“第二”仅用于描述目的,而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此,限定有“第一”、“第二”的特征可以明示或者隐含地包括一个或者多个该特征。在本申请的描述中,“多个”的含义是两个或两个以上,除非另有明确具体的限定。
在本申请中,除非另有明确的规定和限定,术语“安装”、“相连”、“连接”、“固定”等术语应做广义理解,例如,可以是固定连接,也可以是可拆卸连接,或成一体;可以是机械连接,也可以是电连接;可以是直接相连,也可以通过中间媒介间接相连,可以是两个元件内部的连通或两个元件的相互作用关系。对于本领域的普通技术人员而言,可以根据具体情况理解上述术语在本申请中的具体含义。
电池在制备完成后需要经过一道重要的工序——电池化成工序。电池化成工序指的是:在电池制备完成后,首次采用充放电方式让电池内的活性物质激活,并在极片活性层表面(通常是在负极活性层的表面)生成一种固体电解质界面膜(solid electrolyte interphase,简称SEI膜,又称钝化膜)的过程。生成于极片活性层表面的SEI膜,可防止极片活性物质与电解液发生氧化还原反应,从而可保障电池的电化学稳定性、循环寿命,以及自放电等电性能。
但在电池化成过程中,在极片活性层表面生成SEI膜的同时,会伴随产生一些气体。这些气体基本都是绝缘气体(例如烃类气体)。若不及时排出气体,气体会阻碍活性离子通道,而导致活性离子不能顺畅迁移至极片活性层,从而导致极片产生黑斑、析锂等问题,从而会影响SEI膜的成膜质量,会影响电池化成效果,会影响电池的电化学稳定性、循环寿命,以及自放电等电性能。因此,在电池化成过程中,需要将气体及时从电池内排出。
对此,相关行业通常使用化成系统在电池化成期间促使气体及时从电池内排出。在一些情形下,化成系统会设置电池托盘,以装载电池。且化成系统可通过电池托盘的夹板对电池进行夹持和施压,以抑制电池的电极组件的层间间隙(GAP),而促使电池化成过程中产生的气体从电池内排出。但夹板施加的力在作用于电池的整个侧面时会向电池的四周扩散、抵消,导致电池内部的电极组件受力不均,导致极片界面不平整,从而导致化成系统经由夹板对电池的夹持和施压的效果不佳,致使排气效果不佳,致使SEI膜的成膜质量及电池化成效果不佳。
由此,本申请的一些实施例提供了一种化成系统,该化成系统可通过电池托盘装载电池,尤其可通过气囊组件的相邻两个气囊结构之间的夹持空间装载电池。还可通过供气通道连通外部气源和各气囊结构,以在外部气源和各气囊结构之间传输气体,而实现对气囊结构进行充气或泄气。基于此,在电池置于夹持空间中且电池化成时,处于电池相对两侧的气囊结构可通过充气或泄气,调整气囊结构的内部气压,使得气囊结构具有一定的内部气压,以共同对处于其间的电池进行抵压、施压。期间,基于气囊结构自身的弹性,气囊结构的表面可紧密地弹性抵压电池的整个侧面,使得气囊结构对电池的压力可相对均匀地 分布在电池的整个侧面,使得电池及其内的电极组件可受到均匀的压力。由此,处于电池相对两侧的气囊结构,能够共同对处于其间的电池形成较佳的抵压、夹持、约束、束缚的效果,能够在电池化成期间可靠地抑制电池内部的电极组件的层间间隙,从而可有效促使电池化成期间所产生的气体能够及时从电池内排出,可有效保障并提高电池化成期间的排气效果,可有效降低气体阻碍活性离子通道而导致极片产生黑斑、析锂等问题的风险,从而可保障并提高SEI膜的成膜质量、电池化成效果,以及电池的电化学稳定性、循环寿命、自放电等性能。
本申请实施例公开的化成系统可用于在电池化成期间促使气体及时从电池内排出。其中,电池可以是锂离子二次电池、锂离子一次电池、锂硫电池、钠锂离子电池、钠离子电池或镁离子电池等等。电池可呈圆柱体、扁平体、长方体或其他形状等等。电池可采用不同封装方式,形成柱形电池、方形电池或软包电池等等。
为了说明本申请所提供的技术方案,以下结合具体附图及实施例,进行详细说明。
请参阅图1,图1为本申请一些实施例提供的电池10的分解示意图。其中,电池10可以是锂离子二次电池、锂离子一次电池、锂硫电池、钠锂离子电池、钠离子电池或镁离子电池等等。电池10可呈圆柱体、扁平体、长方体或其他形状等等。电池10可采用不同封装方式,形成柱形电池、方形电池或软包电池等等。电池10可以独立使用,也可以配合其他电池10形成能够提供更高电压和容量的模块化结构,例如电池模块、电池模组或电池包。
电池10可以用于使用电池10作为电源的用电装置,或者用于使用电池10作为储能元件的各种储能系统。用电装置可为但不限于为车辆、手机、便携式设备、笔记本电脑、轮船、航天器、电动玩具和电动工具等等。车辆可以是燃油汽车、燃气汽车或新能源汽车,新能源汽车可以是纯电动汽车、混合动力汽车或增程式汽车等。航天器包括飞机、火箭、航天飞机和宇宙飞船等等。电动玩具包括固定式或移动式的电动玩具,例如,游戏机、电动汽车玩具、电动轮船玩具和电动飞机玩具等等。电动工具包括金属切削电动工具、研磨电动工具、装配电动工具和铁道用电动工具,例如,电钻、电动砂轮机、电动扳手、电动螺丝刀、电锤、冲击电钻、混凝土振动器和电刨等等。
电池10包括电极组件11、电解液(图中未示出)、壳体12、端盖13等部件。
端盖13是指盖合于壳体12的开口处以将电池10的内部环境隔绝于外部环境的部件。在一些实施例中,端盖13的形状可以与壳体12的形状相适应以配合壳体12。在一些实施例中,端盖13可以由具有一定硬度和强度的材质制成,这样,端盖13在受挤压碰撞时就不易发生形变,使电池10能够具备更高的结构强度,安全性能也可以有所提高。其中,端盖13的材质可以多样化,端盖13可以由铜、铁、铝、不锈钢、铝合金、塑胶等材质制成。在一些实施例中,端盖13上可以设置如电极端子14等功能性部件。电极端子14可以用于与电极组件11电连接,以用于输出或输入电能。在一些实施例中,端盖13上还可以设置用于在电池10的内部压力或温度达到阈值时泄放内部压力的泄压机构(图中未示出)。在一些实施例中,在端盖13的内侧还可以设置绝缘件(图中未示出),绝缘件可以用于隔离壳体12内的电连接部件与端盖13,以降低短路的风险。可选地,绝缘件可以是塑料、橡胶等。
壳体12是用于配合端盖13以形成电池10的内部环境的部件。壳体12配合端盖13共同围合形成的内部环境可以用于容纳电极组件11、电解液等部件。在一些实施例中,壳体 12和端盖13可以是独立的部件,可以于壳体12上设置开口,通过在开口处使端盖13盖合开口以形成电池10的内部环境。在一些实施例中,也可以使端盖13和壳体12一体化,具体地,端盖13和壳体12可以在其他部件入壳前先形成一个共同的连接面,当需要封装壳体12的内部时,再使端盖13盖合壳体12。其中,壳体12可以是多种形状和多种尺寸的,例如长方体、圆柱体、六棱柱等。具体地,壳体12的形状可以根据电极组件11的具体形状和尺寸大小来确定。其中,壳体12的材质可以多样化,壳体12可以由铜、铁、铝、不锈钢、铝合金、塑胶等材质制成。
请一并参阅图2、图3,图2为本申请一些实施例提供的电极组件11的结构示意图,图3为图2提供的电极组件11的局部示意图。电极组件11是电池10中发生电化学反应的部件。壳体12内可以包括一个或多个电极组件11。电极组件11包括正极极片111、负极极片112和隔膜113,隔膜113将正极极片111和负极极片112隔开。正极极片111、负极极片112和隔膜113可经由卷绕方式、层叠方式或其他方式加工形成电极组件11。
电极组件11中,正极极片111包括正极集流体1111和正极活性层1112,正极活性层1112设置于正极集流体1111沿厚度方向的侧面,正极集流体1111的未设置正极活性层1112的区域可作为正极极耳1113,正极极耳1113为正极极片111的电流输出端。其中,正极集流体1111的材料可为铝等等,正极活性层1112的正极活性物质可为钴酸锂、磷酸铁锂、三元锂或锰酸锂等等。
负极极片112包括负极集流体1121和负极活性层1122,负极活性层1122设置于负极集流体1121沿厚度方向的侧面,负极集流体1121的未设置负极活性层1122的区域可作为负极极耳1123,负极极耳1123为负极极片112的电流输出端。其中,负极集流体1121的材料可为铜等等,负极活性层1122的负极活性物质可为石墨、碳或硅等等。其中,正极极耳1113和负极极耳1123可以共同处于电极组件11的一侧或分别处于电极组件11的相对两侧。
隔膜113为绝缘膜,用于隔开正极极片111和负极极片112,防止负极极片112和正极极片111短路。隔膜113具有若干孔隙,可供活性离子自由穿透。其中,隔膜113的材质可为PP(polypropylene,聚丙烯)或PE(polyethylene,聚乙烯)等。其中,活性离子可以是锂离子、钠离子等等。
电解液是浸润电极组件11的液体。电解液包括电解质盐和溶剂。电解质盐可包括六氟磷酸锂、四氟硼酸锂、高氯酸锂、六氟砷酸锂、双氟磺酰亚胺锂、双三氟甲磺酰亚胺锂、三氟甲磺酸锂、二氟磷酸锂、二氟草酸硼酸锂、二草酸硼酸锂、二氟二草酸磷酸锂及四氟草酸磷酸锂中的至少一种。溶剂可包括碳酸亚乙酯、碳酸亚丙酯、碳酸甲乙酯、碳酸二乙酯、碳酸二甲酯、碳酸二丙酯、碳酸甲丙酯、碳酸乙丙酯、碳酸亚丁酯、氟代碳酸亚乙酯、甲酸甲酯、乙酸甲酯、乙酸乙酯、乙酸丙酯、丙酸甲酯、丙酸乙酯、丙酸丙酯、丁酸甲酯、丁酸乙酯、1,4-丁内酯、环丁砜、二甲砜、甲乙砜及二乙砜中的至少一种。
电池10主要依靠活性离子在正极极片111和负极极片112之间移动来工作,具体地,当电池10充电时,正极极片111会生成活性离子,正极极片111所提供的活性离子可穿透隔膜113的孔隙、经由电解液运动至负极极片112并嵌入负极极片112的负极活性物质中。反之,当电池10放电时,嵌在负极极片112的负极活性物质中的活性离子脱出,从负极极片112脱出的活性离子可穿透隔膜113的孔隙、经由电解液运动至正极极片111并嵌入正极极片111的正极活性物质中。
电池10在制备完成后需要经过一道重要的工序,即电池10化成工序。电池10化成工序指的是:在电池10制备完成后,首次采用充放电方式让电池10内的活性物质激活,并在极片活性层(通常是负极活性层1122)表面生成SEI膜(图中未示出)的过程。具体地,在电池10化成过程中,电解液中的溶剂分解,分解的溶剂分子与电子、活性离子发生化学反应,会在极片活性层(通常是负极活性层1122)表面生成SEI膜,并且会产生一定量的气体。其中,所生成的SEI膜,可防止极片活性物质(通常是负极活性物质)与电解液发生氧化还原反应,从而可保障电池10的电化学稳定性、循环寿命,以及自放电等电性能。其中,伴随产生的气体基本都是绝缘气体(例如烃类气体),若不及时排出,气体会阻碍活性离子通道,而导致活性离子不能顺畅嵌入极片活性层,从而导致极片产生黑斑、析锂等问题,进而影响SEI膜的成膜质量、电池10化成效果,以及电池10的电化学稳定性、循环寿命、自放电等电性能。由此,可使用化成系统在电池10化成期间促使气体及时从电池10内排出。
请参阅图1、图4、图5,本申请的一些实施例提供了一种化成系统,可用于在电池10化成期间促使气体及时从电池10内排出。
化成系统包括电池托盘20和供气管道30。电池托盘20包括至少一个气囊组件21。气囊组件21包括多个具有弹性的气囊结构211,气囊组件21的多个气囊结构211沿第一方向x间隔布置,并于相邻两个气囊结构211之间形成夹持空间212,夹持空间212用于装载电池10。供气管道30与各气囊结构211连通,并用于与外部气源90连通。
需要说明的是,电池托盘20是用于装载电池10的工具。电池托盘20包括气囊组件21。其中,气囊组件21可以设置一个,也可以设置多个。当气囊组件21设有多个时,多个气囊组件21可以分别成列设置,即多个气囊组件21可以分处于不同列。示例地,电池托盘20可包括两个气囊组件21,两个气囊组件21沿第二方向间隔布置,第二方向垂直于第一方向x,如此设置,可便于通过两个气囊组件21规整地装载较多电池10,从而便于同步进行多个电池10的化成及化成期间的排气,从而利于兼顾保障并提高多个电池10的化成效率和化成效果。
气囊组件21包括多个气囊结构211。气囊结构211具有较佳的弹性,气囊结构211可充气鼓胀,也可泄气缩瘪。具体地,气囊结构211包括中空的柔性胶囊体(有点像气球,但弹性更好),通过往柔性胶囊体的内部充气,可经由气体使得柔性胶囊体鼓胀,且柔性胶囊体不易爆裂;反之,通过将柔性胶囊体的内部的气体向外泄出,可使得柔性胶囊体缩瘪,恢复原始的瘪状形态。
同一气囊组件21中,各气囊结构211沿第一方向x间隔布置,使得每相邻两个气囊结构211之间的初始间隙空间形成一个夹持空间212,夹持空间212可用于装载电池10。其中,各气囊结构211可以相互平行设置,也可以呈小夹角设置,只要相邻两个气囊结构211之间形成的夹持空间212能够用于装载电池10即可。其中,各夹持空间212在第一方向x上的宽度d可以相等设置,也可以不等设置,换言之,气囊组件21的各气囊结构211可以等间距设置,也可以不等间距设置。
其中,电池托盘20可以是固定在化成库位的固定部件,此情形下,电池托盘20仅用于化成系统。或者,电池托盘20可以是能够移动并经过化成库位的可移动部件,此情形下,电池托盘20可停靠于化成库位以用于化成系统,也可连同其装载的电池10一起移动至其他如注液、分容、测量等库位以用于其他系统。
还需要说明的是,供气管道30是用于传输气体的部件,尤其供气管道30的内部可引导气体流动。供气管道30与各气囊结构211连通,且与外部气源90连通。其中,外部气源90可为但不限于为气泵、储气罐等等。其中,驱使气体于供气管道30中流动的驱动力可以来源于气泵等外部气源90,也可以来源于其他部件。其中,供气管道30可以固定在化成库位,无论电池托盘20是固定在化成库位的固定部件,还是能够移动并经过化成库位的可移动部件,供气管道30均可与电池托盘20的各气囊结构211连通。当然,在电池托盘20是固定在化成库位的固定部件的情形下,供气管道30也可以固定在电池托盘20上。
基于此,供气管道30可将外部气源90输出的气体传输至气囊结构211的内部,以对气囊结构211进行充气,使得气囊结构211逐渐鼓胀,随着气囊结构211的鼓胀,气囊结构211的内部气压会逐渐增大。反之,供气管道30可将气囊结构211中的气体反向传输至外部气源90,以对气囊结构211进行泄气,使得气囊结构211逐渐缩瘪,随着气囊结构211的缩瘪,气囊结构211的内部气压会逐渐缩小。
如此,即可通过任意相邻两个内部充有气体的气囊结构211,对处于其间的夹持空间212内的电池10进行抵压、施压,以对该电池10形成抵压、夹持、约束、束缚的效果。并且,气囊结构211可通过充气增加对电池10的压力,可通过泄气降低对电池10的压力,以保障对电池10的压力能够满足排气需求。并且,由于气囊结构211具有较佳的弹性,气囊结构211的表面可紧密地弹性抵压电池10的整个侧面,使得气囊结构211对电池10的压力可相对均匀地分布在电池10的整个侧面,使得电池10及其内的电极组件11可受到均匀的压力。由此,任意相邻两个内部充有气体的气囊结构211,能够对电池10形成较佳的抵压、夹持、约束、束缚的效果,能够可靠地抑制电池10内部的电极组件11的层间间隙,从而可有效促使电池10化成期间所产生的气体能够及时从电池10内排出。
综上,本申请实施例提供的化成系统,可通过电池托盘20装载电池10,尤其可通过气囊组件21的相邻两个气囊结构211之间的夹持空间212装载电池10。还可通过供气通道连通外部气源90和各气囊结构211,以在外部气源90和各气囊结构211之间传输气体,而实现对气囊结构211进行充气或泄气。基于此,在电池10置于夹持空间212中且电池10化成时,处于电池10相对两侧的气囊结构211可通过充气或泄气,调整气囊结构211的内部气压,使得气囊结构211具有一定的内部气压,以共同对处于其间的电池10进行抵压、施压。期间,基于气囊结构211自身的弹性,气囊结构211的表面可紧密地弹性抵压电池10的整个侧面,使得气囊结构211对电池10的压力可相对均匀地分布在电池10的整个侧面,使得电池10及其内的电极组件11可受到均匀的压力。由此,处于电池10相对两侧的气囊结构211,能够共同对处于其间的电池10形成较佳的抵压、夹持、约束、束缚的效果,能够在电池10化成期间可靠地抑制电池10内部的电极组件11的层间间隙,从而可有效促使电池10化成期间所产生的气体能够及时从电池10内排出,可有效保障并提高电池10化成期间的排气效果,可有效降低气体阻碍活性离子通道而导致极片产生黑斑、析锂等问题的风险,从而可保障并提高SEI膜的成膜质量、电池10化成效果,以及电池10的电化学稳定性、循环寿命、自放电等性能。
并且,由于电池10被对应置于夹持空间212中,在电池10化成过程中,处于电池10相对两侧的气囊结构211可对处于其间的电池10形成一定的限位效果,从而可利于保障并提高电池10在化成过程中的位置稳定性,可降低因电池10位置发生变化而导致化成机的探针出现偏移的风险,从而可提高化成成功率、化成优率,可降低化成返工率。
并且,基于气囊结构211自身的弹性,气囊结构211对电池10进行抵压、施压时,还不易压溃电池10的壳体12及电池10。
并且,该化成系统的加压方式简单、方便,所需涉及的设备较少,从而可降低成本,可减少整个化成系统所需占用的空间。
请参阅图1、图4、图5,在本申请的一些实施例中,化成系统还包括设于供气管道30上的调节阀40,调节阀40用于调节供气管道30传输的气体的压力和/或流量。
需要说明的是,调节阀40为控制阀,即包括至少一个流入口和至少两个流出口的可控制的阀。调节阀40设于供气管道30上,具体处于电池托盘20和外部气源90之间。调节阀40能够调节供气管道30传输的气体的压力和/或流量(即,可以仅控制压力,可以仅控制流量,也可以同时控制压力和流量),尤其能够控制至少一个流出口输出的气体的压力和/或流量。
其中,调节阀40可以是多种类型的可控制的三通阀。其中,调节阀40可以是具有执行机构的自动调节阀(例如电动调节阀等),也可以是通过人工控制的手动调节阀。
通过采用上述方案,可便于在电池10化成过程中,通过调节阀40快速、简便地调节供气管道30传输的气体的压力和/或流量,而方便、快捷、可靠地调节气囊结构211的充气或泄气的幅度,从而可方便、快捷、可靠地调节气囊结构211的内部气压,可调节各组相邻两个气囊结构211对其间的电池10的抵压力、束缚力。尤其,在电池10化成过程中,随着电极组件11的膨胀,电池10所需束缚力增加,基于本实施例的设置,可便于随着电极组件11的膨胀,通过调节阀40控制气囊结构211的内部气压适应增加,以增强各组相邻两个气囊结构211对其间的电池10的抵压力、束缚力。由此,即可基于调节阀40,使得气囊结构211的内部气压以及气囊结构211对电池10的抵压力均具有可控性,从而可保障并提高化成系统在电池10化成期间对电池10的束缚效果,可保障并提高电池10化成期间的排气效果,进而可提高电池10化成效果和电池10化成优率,可节省化成工序耗时,可降低化成返工率,可提高SEI膜的成膜质量及电池10的性能。
请参阅图1、图4、图5,在本申请的一些实施例中,化成系统还包括控制器50,控制器50与调节阀40连接,控制器50用于控制调节阀40。
需要说明的是,控制器50指的是能够对输入信号进行信号处理并输出控制信号的控制器件。
控制器50可为但不限于为可编程逻辑控制器(Programmable Logic Controller,PLC)、单片机(Single-chip Microcomputer)、微控制器(Microcontroller Unit,MCU)、定时程序控制器(例如TPC型定时程序控制器)等。
控制器50与调节阀40连接,具体地,控制器50与调节阀40可以电连接或信号连接,可以有线连接或无线连接。控制器50可向调节阀40输出控制信号,以控制调节阀40调节供气管道30传输的气体的压力和/或流量。
通过采用上述方案,可便于在电池10化成过程中,通过控制器50自动化控制调节阀40,以使调节阀40能够快速、自动、可控地调节供气管道30传输的气体的压力和/或流量,从而可快速、可靠、自动、可控地实现调节气囊结构211的内部气压以及气囊结构211对电池10的抵压力,从而可保障并提高化成系统在电池10化成期间对电池10的束缚效果,可保障并提高电池10化成期间的排气效果,进而可提高化成效果、化成优率和化成一致性,可节省化成工序耗时,可降低化成返工率,可提高SEI膜的成膜质量及电池10的性能。
当然,在其他可能的实施方式中,调节阀40可以是手动调节阀,可以省略设置控制器50。
请参阅图1、图4、图5,在本申请的一些实施例中,化成系统还包括设于供气管道30上的气压检测器60,气压检测器60处于调节阀40和电池托盘20之间。气压检测器60用于检测供气管道30传输的气体的压力。
需要说明的是,气压检测器60是能够检测气体的压力的检测元件。气压检测器60可为但不限于为气压表、压力表、气压传感器等。气压检测器60设于供气管道30上,具体处于调节阀40和电池托盘20之间。气压检测器60能够检测供气管道30传输的气体的压力。可根据气压检测器60的检测结果,对调节阀40进行调节。
通过采用上述方案,在电池10化成过程中,可通过气压检测器60在调节阀40和电池托盘20之间的供气管道30部分,实时检测供气管道30传输的气体的压力,以便于根据气压检测器60的检测结果,适应性手动或自动地控制调节阀40进行调节,以使调节阀40能够根据需要快速、可控、精准地调节供气管道30传输的气体的压力和/或流量,从而可在电池10化成过程中,快速、可控、及时、精准地调节气囊结构211的内部气压以及气囊结构211对电池10的抵压力,从而可保障并提高化成系统在电池10化成期间对电池10的束缚效果,可保障并提高电池10化成期间的排气效果,进而可提高化成效果、化成优率和化成一致性,可节省化成工序耗时,可降低化成返工率,可提高SEI膜的成膜质量及电池10的性能。
请参阅图1、图4、图5,在本申请的一些实施例中,气压检测器60与控制器50通信连接,控制器50用于根据气压检测器60的检测数据控制调节阀40。
需要说明的是,气压检测器60与控制器50通信连接,指的是气压检测器60的检测数据能够传输至控制器50的连接方式,可以是有线连接,也可以是无线连接。控制器50可接收气压检测器60的检测数据,并对气压检测器60的检测数据进行分析处理,再向调节阀40输出控制信号,以实现根据气压检测器60的检测数据控制调节阀40进行调节。
通过采用上述方案,可通过气压检测器60实时检测供气管道30传输的气体的压力,并通过控制器50根据气压检测器60的检测数据,快速、及时、自动化地控制调节阀40进行调节,以使调节阀40能够快速、及时、可控、精准地调节供气管道30传输的气体的压力和/或流量。尤其,在气体的压力因漏气等原因减小时,可通过控制器50根据气压检测器60的检测数据,及时控制调节阀40进行调节,及时增加供气管道30传输的气体的压力和/或流量,实现压力防呆。由此,即可在电池10化成过程中,实时监测,并快速、及时、可控、精准地调节气囊结构211的内部气压以及气囊结构211对电池10的抵压力,从而可保障并提高化成系统在电池10化成期间对电池10的束缚效果,可保障并提高电池10化成期间的排气效果,进而可提高化成效果、化成优率和化成一致性,可节省化成工序耗时,可降低化成返工率,可提高SEI膜的成膜质量及电池10的性能。
当然,在其他可能的实施方式中,在省略设置控制器50的情形下,可直接显示气压检测器60的检测数据,以便于根据气压检测器60的检测数据,手动地对调节阀40进行调节。
当然,在其他可能的实施方式中,在省略设置气压检测器60的情形下,控制器50可根据预设编程控制调节阀40。
请参阅图1、图4、图5,在本申请的一些实施例中,化成系统还包括设于供气管道30上的减速器70,减速器70处于调节阀40和电池托盘20之间,减速器70用于降低供气管 道30传输的气体的流速。
需要说明的是,减速器70是能够降低气体的流速的部件。减速器70设于供气管道30上,具体处于调节阀40和电池托盘20之间。减速器70能够降低供气管道30传输的气体的流速,以缓冲气压的变化幅度,减少气压突变。
通过采用上述方案,在电池10化成过程中,尤其在调节阀40调节供气管道30传输的气体的压力和/或流量的期间,可通过减速器70在调节阀40和电池托盘20之间的供气管道30部分,降低供气管道30传输的气体的流速,以缓冲气压的变化幅度,减少气压突变,减少气压突变对气囊结构211的冲击,从而可利于精准地调节气囊结构211的内部气压以及气囊结构211对电池10的抵压力,并利于保障并延长气囊结构211、电池托盘20及化成系统的使用寿命。
请参阅图1、图4、图5,在本申请的一些实施例中,调节阀40包括电磁阀、比例阀中的至少一种。
需要说明的是,电磁阀是用电磁控制的控制阀,可用于自动化调节供气管道30传输的气体的方向、流量、速度等参数。电磁阀具有较高的控制精度和灵活性。
比例阀是电控的控制阀,可根据需要打开阀口,并使阀口呈现所需开度,以此控制通过供气管道30的气体的流量大小。比例阀可实现连续控制、比例控制。
通过采用上述方案,可通过使调节阀40为电磁阀或比例阀,以便于调节阀40精准调节供气管道30传输的气体的流量,而有效提高对气囊结构211的内部气压及气囊结构211对电池10的抵压力的调节便利性和调节精度。
当然,在其他可能的实施方式中,调节阀40可以是其他种类的控制阀。
请参阅图1、图4、图5,在本申请的一些实施例中,化成系统还包括设于供气管道30上的开关阀80,开关阀80用于打开或关闭供气管道30。
需要说明的是,开关阀80是可在开启状态和关闭状态之间切换的阀。开关阀80设于供气管道30上,可以设置在供气管道30的任意位置处,例如可以设于调节阀40和电池托盘20之间。开关阀80可用于打开或关闭供气管道30。当开关阀80打开供气管道30时,可允许气体沿供气管道30流动,尤其允许气体通过开关阀80。当开关阀80关闭供气管道30时,可阻止气体沿供气管道30流动,尤其阻止气体通过开关阀80。
其中,开关阀80可以是多种类型的可启闭的二通阀。其中,开关阀80可以是通过控制器50或其他部件自动化控制的自动开关阀,也可以是通过人工控制的手动开关阀。
通过采用上述方案,可在化成系统作业时,通过开关阀80打开供气管道30,以允许对气囊结构211进行充气或泄气。反之,可在化成系统待业时,通过开关阀80关闭供气管道30,以减少外部气源90的气体的损耗。
请参阅图1、图4,在本申请的一些实施例中,各气囊结构211并联连通至供气管道30。
需要说明的是,各气囊结构211并联设置,且均连通至供气管道30。具体地,供气管道30包括主管道31和多个第一分管道32,各第一分管道32均并联连通至主管道31,各第一分管道32与各气囊结构211一一对应连通。
通过采用上述方案,可通过使各气囊结构211并联连通至供气管道30,以使得供气管道30能够一并对各气囊结构211进行充气或泄气,使得各气囊结构211的内部气压增减变化幅度一致,使得各气囊结构211的内部气压基本等压。基于此,可促使各组相邻两个气 囊结构211对其间的电池10的抵压力、束缚力基本一致,从而可保障并提高化成系统对各电池10的化成一致性,可提高电池10化成效果和电池10化成优率,可节省化成工序耗时,可降低化成返工率。
请参阅图1、图5,在本申请的一些实施例中,各气囊结构211串联连通至供气管道30。
需要说明的是,各气囊结构211串联设置,且最终连通至供气管道30。具体地,供气管道30包括主管道31和多个第二分管道33,各组相邻两个气囊结构211通过第二分管道33连通,处于串联关系的首端或末端的一个气囊结构211通过第二分管道33与主管道31连通。
通过采用上述方案,可通过使各气囊结构211串联连通至供气管道30,以使得供气管道30能够一并对各气囊结构211进行充气或泄气,使得各气囊结构211的内部气压增减变化幅度基本一致,使得各气囊结构211的内部气压基本等压。基于此,可促使各组相邻两个气囊结构211对其间的电池10的抵压力、束缚力基本一致,从而可保障并提高化成系统对各电池10的化成一致性,可提高电池10化成效果和电池10化成优率,可节省化成工序耗时,可降低化成返工率。
当然,在其他可能的实施方式中,各气囊结构211可以混联连通至供气管道30。混联是指既有串联又有并联。
请参阅图1、图4、图5,在本申请的一些实施例中,电池托盘20还包括基座22,气囊组件21安装于基座22上。
需要说明的是,电池托盘20包括基座22,基座22是用于安装并支撑气囊组件21的刚性部件。基座22可呈但不限于呈板状。气囊组件21安装于基座22上,其中,气囊组件21与基座22之间的连接方式可以是可拆卸连接方式,也可以固定连接。
通过采用上述方案,电池托盘20可通过基座22安装气囊组件21,以对气囊组件21进行支撑,并利于稳定气囊组件21的安装位置和安装状态,从而可保障气囊组件21能够可靠地发挥抵压、束缚等效用,可利于保障并提高电池托盘20的使用性能和使用寿命。
请参阅图1、图4、图5,在本申请的一些实施例中,电池托盘20还包括固定组件23,固定组件23与气囊组件21对应设置,固定组件23用于稳固气囊组件21的各气囊结构211。
需要说明的是,电池托盘20包括固定组件23,固定组件23与气囊组件21等量设置且一一对应设置。固定组件23是用于稳固气囊组件21的各气囊结构211的组件,具体用于稳固气囊组件21的各气囊结构211的相对位置和相对状态。
通过采用上述方案,电池托盘20可通过固定组件23限位安装气囊组件21,尤其稳固气囊组件21的各气囊结构211的相对位置和相对状态,从而可保障气囊组件21的各气囊结构211能够分别可靠地对电池10发挥抵压、束缚等效用,可利于保障并提高电池托盘20的结构可靠性和使用可靠性。
请参阅图1、图4、图5,在本申请的一些实施例中,固定组件23包括两个固定件231和至少一个限位件232。两个固定件231沿第一方向x间隔布置。限位件232沿第一方向x延伸设置,并连接于两个固定件231。气囊组件21的各气囊结构211设于两个固定件231之间,并均连接至限位件232。
需要说明的是,固定组件23包括固定件231和限位件232。固定件231设置两个,固定件231可呈但不限于呈板状。两个固定件231沿第一方向x间隔布置,其中,两个固定 件231可以相互平行设置,也可以呈小夹角设置。限位件232可以设置一个或多个,限位件232可呈但不限于呈杆状。限位件232沿第一方向x延伸设置,且限位件232的相对两端分别连接两个固定件231。基于此,固定组件23可通过固定件231和限位件232围合出安装空间,使得气囊组件21可限位安装于安装空间中。
在气囊组件21的各气囊结构211限位安装于安装空间的基础上,各气囊结构211还与限位件232连接,而稳定各气囊结构211之间的相对位置和相对状态。其中,气囊结构211与限位件232之间的连接可以是可拆卸连接,也可以是固定连接。
通过采用上述方案,固定组件23可通过沿第一方向x间隔布置的两个固定件231,以及沿第一方向x延伸设置并连接于两个固定件231的限位件232,共同围合出安装空间,以限位安装气囊组件21。固定组件23还可通过使限位件232与各气囊结构211连接,以可靠稳固气囊组件21的各气囊结构211的相对位置和相对状态。由此,固定组件23即可保障气囊组件21的各气囊结构211能够稳固彼此的相对位置和相对状态,从而可保障气囊组件21的各气囊结构211能够分别可靠地对电池10发挥抵压、束缚等效用,可利于保障并提高电池托盘20的结构可靠性和使用可靠性。
并且,通过采用上述方案,在电池10被对应置于夹持空间212中时,限位件232可对电池10形成一定的限位效果,从而可利于保障并提高电池10在化成过程中的位置稳定性,可降低因电池10位置发生变化而导致化成机的探针出现偏移的风险,从而可提高化成成功率、化成优率,可降低化成返工率。
请参阅图4、图5、图6,在本申请的一些实施例中,气囊结构211包括框架2111,以及安装于框架2111内的气囊2112。
需要说明的是,气囊结构211包括框架2111和气囊2112。框架2111是用于安装并支撑气囊2112的刚性部件,框架2111可为但不限于为矩形框架2111。气囊2112是一种中空的柔性胶囊体(有点像气球,但弹性更好),气囊2112可由任意可恢复型弹性材料制成,具有较佳弹性。气囊2112可充气鼓胀,可泄气缩瘪,以用于对电池10发挥抵压、束缚等效用。气囊2112安装于框架2111内,并与框架2111连接固定,气囊2112与框架2111之间的连接方式不限。
通过采用上述方案,气囊结构211可通过框架2111安装并支撑气囊2112,且便于经由框架2111实现气囊结构211整体的安装固定。气囊结构211还可通过气囊2112的充气鼓胀、泄气缩瘪,可靠地对电池10发挥抵压、束缚等效用,且不易压溃电池10的壳体12及电池10。由此,可保障并提高气囊结构211的结构可靠性和使用可靠性。
请参阅图4、图5、图6,在本申请的一些实施例中,气囊2112通过粘连、压合、硫化中的至少一种方式与框架2111连接。
需要说明的是,气囊2112与框架2111之间可通过粘连剂粘连在一起;或,气囊2112与框架2111之间可通过压合工序连接固定在一起;或,气囊2112与框架2111之间可通过硫化(交联、熟化)连接固定在一起。
通过采用上述方案,气囊2112可通过粘连、压合、硫化中的至少一种方式与框架2111连接固定,基于此,可保障并提高气囊2112与框架2111之间的连接稳固性和连接密封性,从而可保障并提高气囊结构211的结构可靠性和使用可靠性,可降低气囊2112脱落的风险。
当然,在其他可能的实施方式中,气囊2112与框架2111之间可采用其他连接方式。
请参阅图6,在本申请的一些实施例中,框架2111包括铝、不锈钢、硬质塑料中的至 少一种。
需要说明的是,框架2111可由铝、不锈钢、硬质塑料中的至少一种制成。不锈钢可为但不限于为304不锈钢。硬质塑料可为但不限于为ABS(Acrylonitrile Butadiene Styrene plastic,丙烯腈-丁二烯-苯乙烯塑料)、POM(Polyoxymethylene,聚甲醛树脂)、PS(polystyrene,聚苯乙烯系塑料)、PMMA(Polymethyl methacrylate,有机玻璃)、PC(Polycarbonate,聚碳酸酯)、PET(Polyethylene terephthalate,聚对苯二甲酸类塑料)等。
通过采用上述方案,可保障并提高框架2111的刚度和结构强度,从而可保障并提高框架2111对气囊2112的支撑效用,可保障并提高气囊结构211的结构可靠性和使用寿命。
请参阅图4、图5、图6,在本申请的一些实施例中,气囊组件21还包括安装支架213,安装支架213对应设置于夹持空间212,安装支架213设有安装槽2131,安装槽2131沿第一方向x延伸并贯通安装支架213。
需要说明的是,气囊组件21包括安装支架213。同一气囊组件21中,安装支架213与夹持空间212对应设置,具体地,安装支架213对应安装于夹持空间212中。安装支架213设有安装槽2131,可便于电池10经由安装槽2131的槽口安装于安装槽2131中。安装槽2131沿第一方向x延伸设置并贯通安装支架213,可便于安装槽2131相对两侧的气囊结构211对安装槽2131中的电池10发挥抵压、束缚等效用。
通过采用上述方案,可通过在夹持空间212中设置安装支架213,以通过安装支架213的安装槽2131限位安装电池10。基于此,可便于安装槽2131相对两侧的气囊结构211对安装槽2131中的电池10可靠地发挥抵压、束缚等效用,且还便于在电池10化成过程中,通过安装支架213对电池10形成可靠的限位效果,从而可利于保障并提高电池10在化成过程中的位置稳定性,可降低因电池10位置发生变化而导致化成机的探针出现偏移的风险,从而可提高化成成功率、化成优率,可降低化成返工率。
请参阅图1、图4、图5,在本申请的一些实施例中,在第一方向x上,夹持空间212的宽度d比装载于夹持空间212内的电池10的电极组件11的厚度大1mm~2mm。即,夹持空间212在第一方向x上的宽度d,比对应的夹持空间212内所安装的电池10的电极组件11在第一方向x上的厚度,略大1mm~2mm。
通过采用上述方案,通过使夹持空间212在第一方向x上的宽度d,比对应夹持空间212内安装的电池10的电极组件11在第一方向x上的厚度略大1mm~2mm,不仅便于夹持空间212相对两侧的气囊结构211对夹持空间212中的电池10可靠地发挥抵压、束缚等效用,且还便于将电池10取放安装于夹持空间212,从而可利于提高电池10从夹持空间212的取放便利性。
请参阅图4、图5、图6,综合上述各实施例,本申请实施例在此提供化成系统的具体示例。
化成系统包括电池托盘20。电池托盘20包括基座22,以及均设于基座22上的固定组件23和气囊组件21。固定组件23和气囊组件21对应设置。固定组件23包括固定件231和限位件232。固定件231设置两个,固定件231呈板状且立设于基座22上。两个固定件231沿第一方向x间隔布置,且相互平行设置。限位件232设置多个,限位件232呈杆状并沿第一方向x延伸设置,限位件232的相对两端连接两个固定件231。固定组件23的固定件231和限位件232可共同围合形成安装空间,以用于限位安装气囊组件21。
气囊组件21限位安装于安装空间中。气囊组件21包括均立设于基座22上的多个气囊 结构211。气囊结构211包括框架2111,以及安装于框架2111内的气囊2112。气囊2112由任意可恢复型弹性材料制成,具有较佳弹性,可充气鼓胀,可泄气缩瘪。多个气囊结构211沿第一方向x间隔布置,且相互平行设置。气囊结构211连接于基座22和限位件232,以稳固气囊组件21的各气囊结构211之间的相对位置和相对状态。气囊组件21中,每相邻两个气囊结构211之间的初始间隙空间形成一个夹持空间212,夹持空间212中可设置安装支架213,安装支架213具有安装槽2131,安装槽2131可用于装载电池10。
化成系统还包括供气管道30。供气管道30与各气囊结构211连通。供气管道30远离电池托盘20的一端与外部气源90连通。
化成系统还包括气压检测器60、开关阀80、减速器70、调节阀40和控制器50。其中,气压检测器60、开关阀80、减速器70、调节阀40均设于供气管道30上,并沿靠近外部气源90的方向依次间隔设置。开关阀80用于打开或关闭供气管道30。气压检测器60和调节阀40均与控制器50通信连接。气压检测器60用于检测供气管道30传输的气体的压力,并可将检测数据传输给控制器50。控制器50用于根据气压检测器60的检测数据控制调节阀40。调节阀40用于在控制器50的控制下,调节供气管道30传输的气体的流量。减速器70用于配合调节阀40降低供气管道30传输的气体的流速,以缓冲气压的变化幅度,减少气压突变。
基于上述设置,在电池10置于夹持空间212中且电池10化成时,可先使开关阀80打开供气管道30,再经由供气管道30将外部气源90输出的气体传输至气囊结构211的内部,以对气囊结构211进行充气,使得气囊结构211鼓胀。如此,即可通过鼓胀的相邻两个气囊结构211,相配合地、共同地对处于其间的夹持空间212内的电池10进行抵压、施压,并且,基于气囊结构211自身的弹性,气囊结构211的表面可紧密地弹性抵压电池10的整个侧面,使得气囊结构211对电池10的压力可相对均匀地分布在电池10的整个侧面,使得电池10及其内的电极组件11可受到均匀的压力。由此,即可对电池10形成较佳的抵压、夹持、约束、束缚的效果,从而可在电池10化成过程中,可靠地抑制电池10的电极组件11(如图1所示)的层间间隙,而促使电池10化成期间所产生的气体能够及时从电池10内排出。从而可促进排气,可保障并提高电池10化成期间的排气效果,可降低气体阻碍活性离子通道而导致极片产生黑斑、析锂等问题的风险,进而可保障并提高SEI膜的成膜质量、电池10化成效果,以及电池10的电化学稳定性、循环寿命、自放电等性能。
期间,气压检测器60可实时检测供气管道30传输的气体的压力,并将检测数据传输给控制器50。根据气压检测器60的检测数据,当气体的压力未满足要求时,控制器50可快速、及时、自动化地控制调节阀40进行调节,以使调节阀40能够快速、及时、可控、精准地调节供气管道30传输的气体的流量。尤其,在电池10化成过程中,随着电极组件11的膨胀,电池10所需束缚力增加,基于此,控制器50可根据电池10所需束缚力以及气压检测器60的检测数据,控制调节阀40适应性增加供气管道30传输的气体的流量,以增加气囊结构211的内部气压。尤其,在气体的压力因漏气等原因减小时,控制器50可根据气压检测器60的检测数据,控制调节阀40适应性增加供气管道30传输的气体的流量,以压力防呆。期间,减速器70可降低供气管道30传输的气体的流速,以缓冲气压的变化幅度,减少气压突变,减少气压突变对气囊结构211的冲击。由此,在电池10化成过程中,即可实时监测,并快速、及时、可控、精准地调节气囊结构211的内部气压以及气囊结构211对电池10的抵压力,从而可保障并提高化成系统在电池10化成期间对电池10的束缚 效果,可保障并提高电池10化成期间的排气效果,进而可提高化成效果、化成优率和化成一致性,可节省化成工序耗时,可降低化成返工率,可提高SEI膜的成膜质量及电池10的性能。
期间,安装支架213、限位件232以及处于电池10相对两侧的气囊结构211均可对电池10形成一定的限位效果,从而可利于保障并提高电池10在化成过程中的位置稳定性,可降低因电池10位置发生变化而导致化成机的探针出现偏移的风险,从而可提高化成成功率、化成优率,可降低化成返工率。
期间,基于气囊结构211的弹性,气囊结构211对电池10进行抵压、施压时,还不易压溃电池10。
在电池10完成化成时,可先经由供气管道30将气囊结构211中的气体反向传输至外部气源90,以对气囊结构211进行泄气,使得气囊结构211缩瘪。再使开关阀80关闭供气管道30,以减少外部气源90的气体的损耗。此时,若电池托盘20是固定在化成库位的固定部件,可以将各电池10从电池托盘20中取走,以将各电池10投入其他工序。若电池托盘20是暂时停靠在化成库位的可移动部件,可以将电池托盘20连同其装载的电池10一起移走,以将电池托盘20连同其装载的电池10一起投入其他工序。
综上,本申请实施例提供的化成系统,可用于在电池10化成期间促使气体及时从电池10内排出,且加压方式简单、方便,所需涉及的设备较少,从而可降低成本,可减少整个化成系统所需占用的空间。
请参阅图1、图4、图5,本申请的一些实施例还提供了一种电池托盘20,电池托盘20包括至少一个气囊组件21。气囊组件21包括多个具有弹性的气囊结构211,气囊组件21的多个气囊结构211沿第一方向x间隔布置,并于相邻两个气囊结构211之间形成夹持空间212,夹持空间212用于装载电池10。
需要说明的是,电池托盘20是用于装载电池10的工具。电池托盘20包括气囊组件21。其中,气囊组件21可以设置一个,也可以设置多个。当气囊组件21设有多个时,多个气囊组件21可以分别成列设置,即多个气囊组件21可以分处于不同列。基于此,可便于通过一个或多个气囊组件21规整地装载多个电池10,从而便于同步进行多个电池10的化成及化成期间的排气,从而利于兼顾保障并提高多个电池10的化成效率和化成效果。
气囊组件21包括多个气囊结构211。气囊结构211具有较佳的弹性,气囊结构211可充气鼓胀,也可泄气缩瘪。具体地,气囊结构211包括中空的柔性胶囊体(有点像气球,但弹性更好),通过往柔性胶囊体的内部充气,可经由气体使得柔性胶囊体鼓胀,且柔性胶囊体不易爆裂;反之,通过将柔性胶囊体的内部的气体向外泄出,可使得柔性胶囊体缩瘪,恢复原始的瘪状形态。
同一气囊组件21中,各气囊结构211沿第一方向x间隔布置,使得每相邻两个气囊结构211之间的初始间隙空间形成一个夹持空间212,夹持空间212可用于装载电池10。其中,各气囊结构211可以相互平行设置,也可以呈小夹角设置,只要相邻两个气囊结构211之间形成的夹持空间212能够用于装载电池10即可。其中,各夹持空间212在第一方向x上的宽度可以相等设置,也可以不等设置,换言之,气囊组件21的各气囊结构211可以等间距设置,也可以不等间距设置。
其中,电池托盘20可以是固定在化成库位的固定部件,此情形下,电池托盘20仅用于化成系统。或者,电池托盘20可以是能够移动并经过化成库位的可移动部件,此情形下, 电池托盘20可停靠于化成库位以用于化成系统,电池托盘20也可连同其装载的电池10一起移动至其他库位以用于其他系统,例如,电池托盘20可连同其装载的电池10一起移动至注液库位以用于电池10注液系统,电池托盘20可连同其装载的电池10一起移动至分容库位以用于电池10分容系统,等等。
通过采用上述方案,电池托盘20可通过气囊组件21的相邻两个气囊结构211之间的夹持空间212装载电池10,便于电池10的取放、存储甚至转运。当电池托盘20用于化成系统等系统时,电池托盘20还可配合限位装载电池10,以便于化成系统等系统对电池10进行相应作业。尤其,当气囊结构211的内部被充有一些气体时,处于电池10相对两侧的气囊结构211还可共同对处于其间的电池10进行抵压、施压,以对电池10形成较佳的抵压、夹持、约束、束缚的效果,并对电池10形成一定的限位效果,从而可便于配合化成系统等系统对电池10的作业,可利于提高化成系统等系统对电池10的作业效果。
此外,电池托盘20还可参照上述任一实施例提供的化成系统中的电池托盘20进行设置,在此不再一一赘述。
以上所述仅为本申请的较佳实施例而已,并不用以限制本申请,凡在本申请的精神和原则之内所作的任何修改、等同替换或改进等,均应包含在本申请的保护范围之内。

Claims (18)

  1. 一种化成系统,其中,所述化成系统包括:
    电池托盘,包括至少一个气囊组件,所述气囊组件包括多个具有弹性的气囊结构,多个所述气囊结构沿第一方向间隔布置,并于相邻两个所述气囊结构之间形成用于装载电池的夹持空间;
    供气管道,与各所述气囊结构连通,并用于与外部气源连通。
  2. 如权利要求1所述的化成系统,其中,所述化成系统还包括设于所述供气管道上的调节阀,所述调节阀用于调节所述供气管道传输的气体的压力和/或流量。
  3. 如权利要求2所述的化成系统,其中,所述化成系统还包括控制器,所述控制器与所述调节阀连接,所述控制器用于控制所述调节阀。
  4. 如权利要求3所述的化成系统,其中,所述化成系统还包括设于所述供气管道上的气压检测器,所述气压检测器处于所述调节阀和所述电池托盘之间,所述气压检测器用于检测所述供气管道传输的气体的压力。
  5. 如权利要求4所述的化成系统,其中,所述气压检测器与所述控制器通信连接,所述控制器用于根据所述气压检测器的检测数据控制所述调节阀。
  6. 如权利要求2-5中任一项所述的化成系统,其中,所述化成系统还包括设于所述供气管道上的减速器,所述减速器处于所述调节阀和所述电池托盘之间,所述减速器用于降低所述供气管道传输的气体的流速。
  7. 如权利要求2-6中任一项所述的化成系统,其中,所述调节阀包括电磁阀、比例阀中的至少一种。
  8. 如权利要求1-7中任一项所述的化成系统,其中,所述化成系统还包括设于所述供气管道上的开关阀,所述开关阀用于打开或关闭所述供气管道。
  9. 如权利要求1-8中任一项所述的化成系统,其中,各所述气囊结构并联连通至所述供气管道。
  10. 如权利要求1-8中任一项所述的化成系统,其中,各所述气囊结构串联连通至所述供气管道。
  11. 如权利要求1-10中任一项所述的化成系统,其中,所述电池托盘还包括基座,所述气囊组件安装于所述基座上。
  12. 如权利要求1-11中任一项所述的化成系统,其中,所述电池托盘还包括固定组件,所述固定组件与所述气囊组件对应设置,所述固定组件用于稳固所述气囊组件的各所述气囊结构。
  13. 如权利要求12所述的化成系统,其中,所述固定组件包括两个固定件和至少一个限位件,两个所述固定件沿所述第一方向间隔布置,所述限位件沿所述第一方向延伸设置,并连接于两个所述固定件;
    所述气囊组件的各所述气囊结构设于两个所述固定件之间,并均连接至所述限位件。
  14. 如权利要求1-13中任一项所述的化成系统,其中,所述气囊结构包括框架,以及安装于所述框架内的气囊。
  15. 如权利要求14所述的化成系统,其中,所述气囊通过粘连、压合、硫化中的至少 一种方式与所述框架连接;
    和/或,所述框架包括铝、不锈钢、硬质塑料中的至少一种。
  16. 如权利要求1-15中任一项所述的化成系统,其中,所述气囊组件还包括安装支架,所述安装支架对应设置于所述夹持空间,所述安装支架设有安装槽,所述安装槽沿所述第一方向延伸并贯通所述安装支架。
  17. 如权利要求1-16中任一项所述的化成系统,其中,在所述第一方向上,所述夹持空间的宽度比装载于所述夹持空间内的所述电池的电极组件的厚度大1mm~2mm。
  18. 一种电池托盘,其中,所述电池托盘包括至少一个气囊组件,所述气囊组件包括多个具有弹性的气囊结构,多个所述气囊结构沿第一方向间隔布置,并于相邻两个所述气囊结构之间形成用于装载电池的夹持空间。
PCT/CN2024/072463 2023-07-05 2024-01-16 化成系统及电池托盘 Ceased WO2025007541A1 (zh)

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Citations (5)

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Publication number Priority date Publication date Assignee Title
CN105098255A (zh) * 2015-09-22 2015-11-25 河南环宇赛尔新能源科技有限公司 软包装锂离子电池化成夹具及利用其的电池化成方法
CN205960135U (zh) * 2016-08-26 2017-02-15 惠州市德合盛科技有限公司 一种使用气囊夹子的加温加压化成柜
CN206758579U (zh) * 2017-05-09 2017-12-15 南京国轩电池有限公司 一种锂电池化成夹具
CN209766577U (zh) * 2019-04-09 2019-12-10 合肥国轩高科动力能源有限公司 一种软包锂离子电池化成夹具
CN213782060U (zh) * 2020-10-27 2021-07-23 上海卡耐新能源有限公司 电芯化成夹具和压力化成装置

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Publication number Priority date Publication date Assignee Title
CN105098255A (zh) * 2015-09-22 2015-11-25 河南环宇赛尔新能源科技有限公司 软包装锂离子电池化成夹具及利用其的电池化成方法
CN205960135U (zh) * 2016-08-26 2017-02-15 惠州市德合盛科技有限公司 一种使用气囊夹子的加温加压化成柜
CN206758579U (zh) * 2017-05-09 2017-12-15 南京国轩电池有限公司 一种锂电池化成夹具
CN209766577U (zh) * 2019-04-09 2019-12-10 合肥国轩高科动力能源有限公司 一种软包锂离子电池化成夹具
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