WO2024251065A1 - 一种大容量电池的制备工艺 - Google Patents

一种大容量电池的制备工艺 Download PDF

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Publication number
WO2024251065A1
WO2024251065A1 PCT/CN2024/096989 CN2024096989W WO2024251065A1 WO 2024251065 A1 WO2024251065 A1 WO 2024251065A1 CN 2024096989 W CN2024096989 W CN 2024096989W WO 2024251065 A1 WO2024251065 A1 WO 2024251065A1
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WO
WIPO (PCT)
Prior art keywords
cylinder
battery
electrolyte
inner cavity
hole
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/CN2024/096989
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English (en)
French (fr)
Inventor
雷政军
陈孟奇
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D Aus Energy Storage Technology Xian Co Ltd
Original Assignee
D Aus Energy Storage Technology Xian Co Ltd
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Filing date
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Publication of WO2024251065A1 publication Critical patent/WO2024251065A1/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
    • H01M10/04—Construction or manufacture in general
    • H01M10/0404—Machines for assembling batteries
    • 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
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/61—Types of temperature control
    • H01M10/613—Cooling or keeping cold
    • 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
    • H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
    • H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
    • H01M50/209—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for prismatic or rectangular cells
    • 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
    • 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
    • H01M50/258—Modular batteries; Casings provided with means for assembling
    • 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
    • H01M50/271—Lids or covers for the racks or secondary casings
    • 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
    • H01M50/30—Arrangements for facilitating escape of gases
    • H01M50/35—Gas exhaust passages comprising elongated, tortuous or labyrinth-shaped exhaust passages
    • H01M50/367—Internal gas exhaust passages forming part of the battery cover or case; Double cover vent systems
    • 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
    • H01M50/60—Arrangements or processes for filling or topping-up with liquids; Arrangements or processes for draining liquids from casings
    • H01M50/673—Containers for storing liquids; Delivery conduits therefor
    • H01M50/682—Containers for storing liquids; Delivery conduits therefor accommodated in battery or cell casings
    • 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 present application relates to the field of batteries, and specifically to a preparation process for large-capacity batteries.
  • An existing large-capacity battery as shown in FIG1 , includes a battery pack body formed by a plurality of single cells connected in parallel and a shared pipe assembly located at the bottom of the battery pack body; the shared pipe assembly is used to connect the inner cavities of the plurality of single cells so that all the single cells in the battery pack are in one electrolyte system.
  • the battery pack can enhance the uniformity of the electrolyte of each single cell in the battery pack through the shared pipe assembly, improve the cycle life, and can also replenish the electrolyte for the battery pack through the shared pipe assembly, thereby extending the service life of the battery pack and improving the safety of the battery pack.
  • this type of shared pipeline assembly is formed by directly sealing and plugging multiple sections of sub-pipes 01 and intermediate connecting pipes 02 with each other by interference fit; at this time, the multiple sections of sub-pipes 01 are arranged one by one on the lower cover plate 03 of the single battery, and the sub-pipes extend along the arrangement direction of the single battery 1, and are extruded integrally with the lower cover plate 03, and are connected to the opening of the lower cover plate 03.
  • the two ends of the sub-pipeline 01 are used as connecting ends with the middle connecting tube 02 .
  • one end of the sub-pipeline on the two single cells is squeezed into the two ends of the middle connecting tube 02 .
  • the shared pipeline assembly requires that each sub-pipeline 01 and the intermediate connecting pipe 02 be coaxial during the plugging process to achieve effective connection.
  • the coaxiality of each sub-pipeline and the intermediate connecting pipe 02 is difficult to ensure due to the following reasons:
  • the sub-pipeline and the lower cover are an integrated part. If the position of the sub-pipeline on the lower cover is slightly deviated, or the size of each sub-pipeline is slightly deviated, the coaxiality of each sub-pipeline will deviate when plugged in;
  • this solution may cause the sub-pipes to be displaced relative to the lower cover plate, or the lower cover plate to be displaced relative to the cylinder during insertion, thereby causing damage to the battery.
  • the purpose of this application is to provide a preparation process for large-capacity batteries to overcome the problem that existing large-capacity batteries share pipeline components that are difficult to assemble.
  • the technical solution of the present application is to provide a preparation process of a large-capacity battery, which is characterized by comprising the following steps:
  • each third through hole is fixedly sealed with the corresponding single battery shell; the first cover plate and the third cover plate are respectively sealed and connected to the two opposite open ends of the cylinder;
  • the present application places a plurality of single cells inside a cylinder having a shared electrolyte chamber, seals the cylinder with a cover plate, and opens holes in the shell of the single cells through the unpacking process, so that the shared electrolyte chamber and the electrolyte area of the inner cavity of each single cell are connected, and the electrolyte of each single cell is shared to ensure the consistency of each single cell, that is, the electrolyte chamber of each single cell is connected so that the electrolyte of all single cells is in the same system, which reduces the difference between the electrolytes of each single cell, improves the consistency between each single cell to a certain extent, and thus improves the cycle life of the large-capacity battery to a certain extent.
  • the electrolyte sharing chamber of the present application is the first channel located in the cylinder. It does not need to be plugged in. In the arrangement direction of the single battery cells, there is no need to consider the coaxial plugging problem, and the requirements for processing accuracy and assembly accuracy are low. At the same time, no special tooling is required, and the assembly process is relatively simple, which greatly reduces the processing difficulty and processing cost of such large-capacity batteries with a shared system, and can realize mass production.
  • the poles of each single cell of the present application extend out of the top of the shell (in order to ensure the sealing of the entire shell, the gap between the pole and the shell needs to be sealed).
  • the pole has a better heat dissipation effect; in addition, when the pole extends out of the shell, if the battery temperature is too high, it is also convenient to use heat exchange equipment to timely remove the heat of the pole, which can ensure that such large-capacity batteries operate at the optimal temperature.
  • the large-capacity battery manufacturing process of the present application requires the operation of capacity sorting and sorting each single battery in order to maintain the consistency of multiple single batteries in the initial state of the battery module.
  • multiple single cells are directly installed in a sealed housing, and the multiple single cells are in a unified electrolyte system (equivalent to multiple single cells forming a large-capacity battery cell), which reduces the differences between the single cells. Therefore, the production process of the large-capacity battery can omit the work of capacity separation and sorting, thereby improving the cycle life of the large-capacity battery and also improving the production efficiency of the large-capacity battery.
  • the unpacking steps also include:
  • the present application forms a second channel in the cylinder as a gas chamber; during the unpacking process, a hole is opened in the single cell shell so that the gas area in the inner cavity of each single cell is connected with the gas chamber, thereby connecting the gas paths of each single cell.
  • the gases of all single cells are in the same environment to achieve gas balance, thereby reducing the differences between the single cells, improving the consistency between the single cells, and further improving the cycle life of large-capacity batteries.
  • a plurality of single cells that have been sorted by capacity are arranged in the barrel.
  • the first channel of the present application can be formed in the cylinder in two ways, and the second channel is preferably formed in the cylinder in one way:
  • the first forming method of the first channel is similar to the forming method of the second channel, and both can be formed integrally with the cylinder with open ends by using an aluminum extrusion process. Then, accordingly, in the above-mentioned step of processing the shell, the cylinder with open ends can be formed integrally by using an aluminum extrusion process, and the first channel and the second channel can be formed integrally at the same time, serving as the electrolyte shared chamber and the gas chamber, respectively.
  • Each pad is inserted between the bottom of the cylinder and the bottom of the cylinder to ensure that the pole of the single battery is fully extended out of the corresponding third through hole.
  • each single battery extends out of the corresponding third through hole, and the second supporting rib is inserted between the bottom of each single battery and the bottom of the cylinder; the cylinder is turned over so that the top of the cylinder faces upward.
  • the second molding method of the first channel is different from the first molding method. It is formed during the process of loading the single battery into the cylinder. Specifically, the following three methods can be used:
  • At least two first supporting ribs are inserted between the bottom of each single cell and the bottom of the cylinder along the length direction of the cylinder to form a first channel as a shared electrolyte chamber and ensure that the pole of each single cell extends out of the corresponding third through hole;
  • each single battery extends out of the corresponding third through hole, and at least two first supporting ribs are inserted between the bottom of each single battery and the bottom of the cylinder to form an electrolyte sharing chamber;
  • a hole is opened in the single cell shell by using external force or the electrolyte itself, and after the inner cavity of the electrolyte shared chamber and the electrolyte area of the inner cavity of each single cell are connected, it also includes the step of injecting electrolyte into the inner cavity of each single cell through the electrolyte shared chamber to form the entire large-capacity battery.
  • the present application places a plurality of capacity-divided and sorted single cells with a sealing assembly inside a cylinder with a shared electrolyte chamber, seals the cylinder with a cover plate, and opens holes in the shell of the single cells through the unpacking process, so that the shared electrolyte chamber and the electrolyte areas of the inner cavities of each single cell are connected, and the electrolyte of each single cell is shared to ensure the consistency of each single cell, that is, the electrolyte chambers of each single cell are connected so that the electrolytes of all the single cells are in the same system, thereby reducing the differences between the electrolytes of each single cell, improving the consistency between the single cells to a certain extent, and thus improving the cycle life of the large-capacity battery to a certain extent.
  • the electrolyte shared chamber of the present application does not need to be plugged in, and there is no need to consider the coaxial plug-in problem in the arrangement direction of the single battery cells, and the requirements for processing accuracy and assembly accuracy are relatively low. At the same time, no special tooling is required, and the assembly process is relatively simple, which greatly reduces the processing difficulty and processing cost of such large-capacity batteries with a shared system, and can realize mass production.
  • the poles of each single cell of the present application extend out of the top of the shell (in order to ensure the sealing of the entire shell, the gap between the pole and the shell needs to be sealed).
  • the pole has a better heat dissipation effect; in addition, when the pole extends out of the shell, if the battery temperature is too high, it is also convenient to use heat exchange equipment to timely remove the heat of the pole, which can ensure that such large-capacity batteries operate at the optimal temperature.
  • FIG1 is a schematic diagram of a large-capacity battery structure in the background art
  • FIG2 is a schematic diagram of the structure of a large-capacity battery after the outer shell is removed in Example 1;
  • FIG3 is a schematic diagram of the structure of a large-capacity battery in Example 1;
  • FIG4 is a schematic diagram of the structure of a commercially available square shell battery in Example 1;
  • FIG5 is a schematic diagram of a structure of an electrolyte sharing chamber in Example 1;
  • FIG6 is a schematic diagram of another electrolyte sharing chamber structure in Example 1.
  • FIG7 is a schematic diagram of the third electrolyte sharing chamber structure in Example 1.
  • FIG8 is a schematic diagram of the structure of the third cover plate in Example 1;
  • FIG9 is a schematic structural diagram of a large-capacity battery with a heat transfer connector in Example 1;
  • FIG10 is a schematic structural diagram of a heat transfer connector in Example 1.
  • FIG11 is a schematic diagram of the structure of a large-capacity battery in Example 2.
  • FIG12 is a schematic diagram of the structure of the third cover plate in Example 2.
  • FIG13 is a schematic diagram of a cylinder structure in Example 3.
  • FIG14 is a schematic diagram of another cylinder structure in Example 3.
  • FIG15 is a schematic diagram of the structure in which a partition is added to the inner cavity of the U-shaped shell in Example 4.
  • FIG16 is a schematic diagram of the structure of the I-shaped separator and the single battery in Example 4.
  • orientation or positional relationship indicated by the terms “top, bottom” etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of this application.
  • first, second, third, fourth, etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.
  • the length direction of the shell is defined as the x direction
  • the width direction of the shell is defined as the y direction
  • the height direction of the shell is defined as the z direction.
  • the large-capacity battery of this embodiment includes 9 single cells 1 connected in parallel.
  • the single cell 1 is a square shell battery, which includes an upper cover plate, a lower cover plate, a cylinder and a battery cell assembly; the battery cell assembly described here can also be called an electrode assembly, which is arranged in sequence by a positive electrode, a diaphragm, and a negative electrode, and is assembled by a lamination or winding process.
  • the upper cover plate, the cylinder, and the lower cover plate constitute the shell of the single cell 1, and the battery cell assembly is arranged in the shell of the single cell 1.
  • each single battery 1 is provided with a first through hole penetrating the inner cavity thereof;
  • the housing of this embodiment includes a U-shaped shell 2 , a first cover plate 3 , a third cover plate 4 and a second cover plate 5 ; wherein the U-shaped shell 2 and the second cover plate 5 are arranged separately.
  • the bottom 6 of the U-shaped housing is provided with an electrolyte sharing chamber extending along the x direction;
  • the electrolyte sharing chamber can adopt the following structural forms:
  • the first structure is a tube section 7 with a square or circular cross-section fixed on the outer surface of the bottom 6 of the U-shaped shell; through holes are opened in the tube wall and the bottom 6 of the U-shaped shell; the through holes can be multiple, corresponding to and penetrating the first through holes of each single cell; or it can be a long strip through hole penetrating the first through holes of all single cells.
  • a first channel 8 extending along the x direction is provided on the bottom 6 of the U-shaped shell, and the first channel 8 is directly connected to the first through hole of each single battery 1; compared with the first structure that requires a separate pipe section and through holes to be opened on the bottom 6 of the U-shaped shell and the pipe section, the second structure is relatively simple to process and manufacture.
  • the second structure can be implemented in the following two ways:
  • Method 1 can adopt bending, stamping, die-casting or aluminum extrusion technology to directly form the first channel 8 on the bottom 6 of the U-shaped shell, and form a convex inner surface of the bottom 6 of the U-shaped shell away from the top of the U-shaped shell 2 .
  • heat dissipation fins 9 extending along the x direction are arranged on the outer surface of the U-shaped shell bottom 6 and on both sides of the first channel 8. The heat generated during the operation of the large-capacity battery can be dissipated in time through the fins 9.
  • Method 2 as shown in FIG. 7 , at least two first support ribs 10 extending along the x direction are provided on the inner surface of the U-shaped shell bottom 6 , and the two first support ribs 10 and the U-shaped shell bottom 6 area located between the two first support ribs 10 form a first channel 8 .
  • the electrolyte sharing chamber structure shown in FIG7 can ensure the structural regularity of the entire large-capacity battery. As above, on the one hand, it is easy to ensure the density of the energy storage device when integrating the energy storage device based on such large-capacity batteries; on the other hand, it can be treated as a whole and coated with an insulating film (also called a blue film or a protective film) on the outside to improve the overall safety performance of such large-capacity batteries.
  • an insulating film also called a blue film or a protective film
  • the two ends of the first channel 8 in Figures 6 and 7 located in the yz plane are open ends, and the openings at both ends are subsequently sealed by the first cover plate 3 and the third cover plate 4; in other embodiments, the two ends of the first channel 8 located in the yz plane can also be directly closed, but the molding method is relatively complicated.
  • a liquid injection port 11 may be provided in the first channel 8.
  • the liquid injection port 11 may be used to inject liquid into the inner cavity of each single battery 1 and the electrolyte shared chamber.
  • the electrolyte is injected again to ensure the continuity of the electrolyte, and the electrolyte can be replaced through the injection port 11 later.
  • liquid injection port 11 when no liquid is injected, the liquid injection port 11 needs to be sealed by a plug.
  • the third structure uses the gap between the inner surface of the U-shaped shell bottom 6 and the outer surface of the lower cover plate of each single cell as a shared electrolyte chamber. If this structure is adopted, an auxiliary structure is required to improve the stability of each single cell in the shell.
  • the structure of the second cover plate 5 of this embodiment is shown in FIG8 .
  • the second cover plate 5 is provided with a third through hole 12 through which the pole of each single battery 1 can be extended.
  • the second cover plate 5 covers the top open end of the U-shaped shell 2 and is sealed with the open end.
  • the outer shell area corresponding to the third through hole 12 is fixedly sealed with the single battery shell.
  • the edge of the third through hole 12 can be welded to the single battery shell in the area surrounding the pole to achieve sealing.
  • the shells of some single cells 1 with smaller sizes in the z direction may have problems with poor welding or even be unable to be welded to the large-capacity battery shell, making it difficult to ensure the sealing of the third through hole 12 and the single cell shell.
  • a weak portion 15 may be provided in the peripheral area of the third through hole 12.
  • the weak portion 15 in this embodiment may be an annular groove with the center of the third through hole 12 as the center point and opened along the peripheral area of the third through hole 12.
  • the weak portion 15 may also be a long strip groove opened in the peripheral area of the third through hole 12.
  • the solution may be to add a weak portion 15 in the peripheral area of the third through hole 12.
  • a sealing connector may also be provided between the third through hole 12 and the pole, the sealing connector comprising a hollow member; the bottom of the hollow member is used to be sealed and connected to the first area of the single cell, and the top of the hollow member is sealed and connected to the second area of the shell; the first area is the area around any pole in the upper cover of any single cell; the second area is the area corresponding to any third through hole on the shell.
  • the area corresponding to the third through hole is the surrounding area on the outer surface of the shell corresponding to any third through hole; or the area corresponding to the third through hole is the wall of the third through hole.
  • the area around the pole is the area around the insulating seal on the pole.
  • the insulating seal is a part on the single cell used to insulate the pole from the upper cover.
  • the shape of the second cover plate 5 is adapted to the shape of the top open end of the U-shaped shell 2.
  • the flat plate is a square flat plate, and its area can be slightly larger than the area of the top open end of the U-shaped shell 2, and it is fixed to the top open end of the U-shaped shell 2 by fusion welding; the area can also be slightly smaller than the area of the top open end of the U-shaped shell 2, and it is fixed to the top open end of the U-shaped shell 2 by embedding welding.
  • Step 1 Processing the U-shaped shell 2, the first cover plate 3, the third cover plate 4 and the second cover plate 5.
  • Step 2 sorting by capacity, screening multiple single cells that meet the requirements; opening a first through hole at the bottom of the single cell housing and sealing it with a sealing assembly; arranging multiple single cells with sealing assemblies at the first through holes in the U-shaped housing 2 of step 1, and the sealing assembly of each single cell corresponds to the first channel 8 to ensure that the sealing assembly of the single cell is sealed by external force or the electrolyte itself.
  • the sealing assembly can adopt the sealing assembly disclosed in Chinese patents CN218525645U and CN218525614U.
  • Step 3 seal and weld the second cover plate 5 to the open end at the top of the U-shaped shell 2, weld the third through hole 12 to the peripheral part of the single cell shell pole, and weld the first cover plate 3 and the third cover plate 4 to the other two opposite open ends of the U-shaped shell 2 to achieve sealing.
  • the first cover plate 3 and the third cover plate 4 need to seal the two open ends of the first channel 8 located in the yz plane at the same time.
  • the first cover plate, the second cover plate and the third cover plate can also be fixed to the open end of the U-shaped shell 2 by screw fastening or gluing, but compared with the welding method, the sealing or connection reliability is relatively weak.
  • Step 4 Use external force or the electrolyte itself to open the sealing component, so that the inner cavity of the first channel 8 and the electrolyte area of each single battery cavity are connected.
  • the electrolyte in the inner cavity of each single battery 1 is connected through the first channel 8.
  • the electrolyte can be injected into the first channel 8 to ensure the continuity of the electrolyte after the inner cavity of each single battery 1 and the first channel 8 are connected.
  • the heat transfer connector shown in FIG. 9 and FIG. 10 can be used to connect all the single cells 1 in parallel.
  • the heat transfer connector is a slender member, which is used to connect to the positive or negative electrode of each single cell; and a clamping portion for installing a heat transfer tube is provided on the slender member along the axial direction.
  • the electrolyte can be injected into the inner cavity of each single battery 1 through the first channel 8, and then the entire large-capacity battery is formed.
  • this embodiment adds a gas chamber on the second cover plate 5 as a gas sharing chamber or explosion relief channel. Its structure is shown in FIG11 , and the first channel 8 in FIG11 adopts the structure shown in FIG7 , and of course, the first channel 8 can also adopt the structure shown in FIG6 .
  • the gas chamber can adopt the following structural forms:
  • a pipe section with a square or circular cross section is fixed on the outer surface of the top of the second cover plate 5; through holes are opened in the pipe wall and the second cover plate 5;
  • the gap between the inner surface of the second cover plate 5 and the outer surface of the upper cover plate of each single battery cell is used as a gas chamber.
  • a second channel 13 extending along the x direction is provided on the second cover plate 5 ; this structure is simpler than the first structure, and each single cell has a higher stability in the housing than the second structure.
  • the second channel 13 may be formed directly on the second cover plate 5 by using a bending or aluminum extrusion process, wherein the second channel 13 protrudes in a direction away from the U-shaped housing bottom 6 .
  • the second channel 13 When the second channel 13 is used as a gas sharing chamber, a fifth through hole penetrating the inner cavity of the single battery 1 needs to be opened on the top of each single battery 1 shell, and the second channel 13 is connected to the fifth through hole.
  • the gas area of the inner cavity of the single cell 1 is connected.
  • the second cover plate 5 and the open end of the top of the U-shaped shell 2 can also be fixed by bonding or screw connection, but compared with the welding method, the sealing or connection reliability is relatively weak. It should be noted that during operation, it is necessary to block the openings at both ends of the second channel 13 (the open ends parallel to the yz plane) to prevent the external environment from affecting the electrolyte in the inner cavity of each single cell.
  • an exhaust valve and an explosion-proof membrane are arranged on the second channel 13, or only an exhaust valve is arranged; the exhaust valve can be opened manually or automatically, and the exhaust valve is opened regularly, and the gas in the gas zone of each single battery 1 can be discharged through the second channel 13 and the exhaust valve; when the explosion-proof membrane is arranged, the exhaust valve and the explosion-proof membrane are located at both ends of the second channel 13, and the explosion-proof membrane is used for when any single battery 1 has thermal runaway, the thermal runaway smoke breaks through the explosion-proof membrane and is discharged from the second channel 13, so that this type of large-capacity battery has higher safety performance.
  • the second channel 13 When the second channel 13 is used as an explosion relief channel, the second channel 13 covers the explosion relief portion on the top of each single battery 1. When the explosion relief portion of any single battery 1 is broken by the internal smoke, the gas area in the internal cavity of the single battery 1 is connected with the internal cavity of the second channel 13.
  • Example 1 On the basis of the preparation process of Example 1, it is necessary to seal and weld the second cover plate 5 to the open end at the top of the U-shaped shell 2, so that the explosion venting part of each single cell corresponds to the second channel 13, ensuring that after the explosion venting part is broken by the inner cavity flue gas, the explosion venting part and the second channel 13 are connected; weld the third through hole 12 to the surrounding part of the single cell shell pole to achieve sealing.
  • the explosion venting part described in this embodiment includes an explosion venting opening or explosion-proof opening with an explosion venting membrane disposed on the top of the single battery 1 .
  • the U-shaped housing 2 and the second cover plate 5 are integrated into one piece, and the structure of the integrated piece is shown in Figures 13 and 14.
  • the second cover plate 5 may or may not be provided with a gas chamber, and the following description is made taking the case of providing a gas chamber as an example:
  • the shell of this embodiment includes the cylinder shown in Figure 13 or 14 and the first cover plate 3 and the third cover plate 4 for covering the two opposite open ends of the cylinder; the first cover plate 3 and the third cover plate 4 are located in the yz plane. Similarly, it should be noted here that the first cover plate 3 and the third cover plate 4 need to cover the two opposite open ends of the sealed cylinder while covering the two opposite open ends of the sealed first channel 8 and the second channel 13.
  • the cylinder of this embodiment can be integrally formed by aluminum extrusion process; because the cylinder extends along the x direction, its open end is located in the yz plane, and the extrusion direction is along the x direction, therefore, the cylinder that meets the target length can be extruded in one time.
  • the large-capacity battery of this embodiment can be prepared by the following process, taking the structure shown in FIG. 14 as an example:
  • Step 1 Processing the shell:
  • the cylinder, the first cover plate 3 and the third cover plate 4 are processed.
  • Step 2 Prefabricate single cells:
  • Capacity sorting screening multiple single cells that meet the requirements; opening a first through hole at the bottom of the single cell housing and sealing it with a sealing assembly; opening a fifth through hole at the top of the single cell housing and sealing it with a sealing assembly;
  • Step 3 Prefabricated single cells are loaded into the cylinder:
  • the sealing components Arrange multiple single cells with sealing components in the cylinder of step 1; make the first through hole with sealing components correspond to the first channel 8, and the fifth through hole with sealing components correspond to the second channel 13, and ensure that after the sealing components are opened by external force or electrolyte itself, the first through hole is connected to the first channel 8, and the fifth through hole is connected to the second channel 13; the sealing components can adopt the sealing components disclosed in Chinese patents CN218525645U and CN218525614U.
  • the poles of each single cell 1 extend out of the corresponding third through hole 12 on the second cover plate 5.
  • the third through hole 12 is welded to the peripheral part of the pole of the single cell shell to achieve sealing; it should be noted here that in order for each single cell 1 to be smoothly arranged in the cylinder shown in FIG. 14 , the minimum dimension of the cylinder along the z direction needs to be greater than the dimension of the single cell 1 along the z direction, and in order to ensure that the pole of each single cell 1 can extend out of the third through hole 12 at the top of the cylinder, a second supporting rib needs to be added at the bottom of each single cell 1;
  • the plurality of single cells with sealing components can be arranged in the cylinder of step 1 in the following three ways:
  • the size of the long strip-shaped second support ribs of equal height must meet the following requirements: after the second support ribs are added between the bottom of each single battery 1 and the bottom of the cylinder, the pole of each single battery 1 extends out of the corresponding third through hole 12.
  • the cylinder is turned over so that the top of the cylinder faces downward, multiple single cells 1 are fixed as a whole, and pushed into the inner cavity of the cylinder from any open end of the cylinder; or multiple single cells 1 are pushed into the inner cavity of the cylinder from any open end of the cylinder in sequence; under the action of gravity, the pole of each single cell 1 extends out of the corresponding third through hole 12, and the second supporting rib is inserted between the bottom of each single cell 1 and the bottom of the cylinder; the cylinder is turned over so that the top of the cylinder faces upward.
  • the first cover plate 3 and the third cover plate 4 are welded to the other two opposite open ends of the U-shaped shell 2 .
  • the sealing assembly is opened by external force or the electrolyte itself, so that the inner cavity of the first channel 8 and the electrolyte area of each single battery are connected, and the inner cavity of the second channel 13 and the gas area of each single battery are connected.
  • the electrolyte in the inner cavity of each single battery 1 is connected through the first channel 8.
  • the electrolyte can be injected into the first channel 8 to ensure the continuity of the electrolyte after the inner cavity of each single battery 1 and the first channel 8 are connected.
  • the sealing assembly is opened by external force or the electrolyte itself, and the inner cavity of the first channel 8 and the electrolyte area of the inner cavity of each single battery are connected.
  • the first support rib 10 is inserted between the bottom of each single cell and the bottom of the barrel to form the first channel 8, and at the same time, each single cell can be supported so that the pole of each single cell 1 can extend out of the third through hole 12 at the top of the barrel.
  • the same three methods as above can also be used to arrange multiple single cells with sealing components in the barrel shown in FIG13, and it is only necessary to replace the second support rib with the first support rib 10.
  • the specific steps may include:
  • Step 1 Processing the cylinder, the first cover plate 3 and the third cover plate 4.
  • Step 2 sorting by capacity, screening multiple single cells that meet the requirements; opening a first through hole at the bottom of the single cell housing and sealing it with a sealing assembly; opening a fifth through hole at the top of the single cell housing and sealing it with a sealing assembly;
  • the first through hole with the sealing component corresponds to the first channel 8, and the fifth through hole with the sealing component corresponds to the second channel 13, ensuring that after the sealing component is opened by external force or the electrolyte itself, the first through hole is connected to the first channel 8, and the fifth through hole is connected to the second channel 13;
  • the sealing component can adopt the sealing components disclosed in Chinese patents CN218525645U and CN218525614U.
  • each single battery 1 is extended out of the corresponding third through holes 12 on the second cover plate 5, and the third through holes 12 are welded to the surrounding parts of the poles of the single battery housing to achieve sealing;
  • the plurality of single cells with sealing components can be arranged in the cylinder of step 1 in the following three ways:
  • the size of the long and equal-height first supporting ribs must meet the following requirements: after the first supporting ribs are added between the bottom of each single battery 1 and the bottom of the cylinder, the pole of each single battery 1 extends out of the corresponding third through hole 12.
  • the cylinder is turned over so that the top of the cylinder faces downward, multiple single cells 1 are fixed as a whole, and pushed into the inner cavity of the cylinder from any open end of the cylinder; or multiple single cells 1 are pushed into the inner cavity of the cylinder from any open end of the cylinder in sequence; under the action of gravity, the pole of each single cell 1 extends out of the corresponding third through hole 12, and the first supporting rib is inserted between the bottom of each single cell 1 and the bottom of the cylinder; the cylinder is turned over so that the top of the cylinder faces upward.
  • Step 3 Weld the first cover plate 3 and the third cover plate 4 to the other two opposite open ends of the U-shaped shell 2.
  • Step 4 Use external force or the electrolyte itself to open the sealing assembly, so that the inner cavity of the first channel 8 and the electrolyte area of each single battery are connected, and the inner cavity of the second channel 13 and the gas area of each single battery are connected.
  • the electrolyte in the inner cavity of each single battery 1 is connected through the first channel 8.
  • the electrolyte can be injected into the first channel 8 to ensure the continuity of the electrolyte after the inner cavity of each single battery 1 and the first channel 8 are connected.
  • a plurality of partitions 16 are added to the inner cavity of the U-shaped shell 2 or the inner cavity of the cylinder, so as to divide the inner cavity of the U-shaped shell 2 or the inner cavity of the cylinder into a plurality of single-cell battery 1 installation cavities, as shown in FIG. 15 and FIG. 16;
  • the partition 16 can be a flat plate, or an I-shaped partition as shown in FIG.
  • the vertical beam 17 of the I-shaped partition is parallel to the first cover plate 3 and the third cover plate 4, and contacts the side walls of the two single-cell batteries 1 adjacent to each other in the yz plane, a cross beam 18 of the I-shaped partition contacts the side walls of the two single-cell batteries 1 in the xz plane, and another cross beam 18 of the I-shaped partition contacts the other side walls of the two single-cell batteries 1 in the xz plane.
  • a single cell 1 is fixed in each single cell 1 installation cavity.
  • Each single cell 1 near the middle part has side walls on both sides in contact with the partition 16.
  • One side wall of the two single cells 1 near the outermost part is in contact with the partition 16, and the other side wall is in contact with the first cover plate 3 or the third cover plate 4.
  • the installation stability of each single cell 1 in the shell can be improved; on the second hand, it can prevent each single cell 1 from swelling, which may cause the problem of reduced cycle performance of large-capacity batteries; on the third hand, the heat generated during the charging and discharging process of each single cell 1 can be transmitted to the outside through the partition 16, reducing the risk of thermal runaway; on the fourth hand, the overall strength of the shell can be enhanced.
  • two or more single cells 1 can be fixed in each single cell 1 installation cavity. However, compared with the present embodiment, the stability of the single cell 1 is poor.

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Abstract

本申请涉及电池领域，具体为一种大容量电池的制备工艺。克服现有大容量电池共享管路组件难以组装的问题。包括加工外壳、预制单体电池、预制单体电池装入筒体、密封、开包以及并联的步骤。将具有密封组件的多个单体电池置于具有电解液共享腔室的筒体内部，利用盖板密封筒体，通过开包过程，打开密封组件，使得电解液共享腔室和各个单体电池内腔的电解液区贯通，各单体电池电解液共享来保障各单体电池的一致性，一定程度上提升了大容量电池的循环寿命。且电解液共享腔室为位于筒体内的第一通道，无需插接，对加工精度以及装配精度要求较低；同时装配过程较为简单，大大降低了此类具有共享体系大容量电池的加工难度及加工成本。

Description

一种大容量电池的制备工艺 技术领域
本申请涉及电池领域，具体为一种大容量电池的制备工艺。
背景技术
目前市场上多通过并联或串联多个单体电池使其成为大容量电池(也可称之为电池模组或电池组)。
现有的一种大容量电池，其结构如图1所示，包括由若干单体电池并联形成的电池组主体和位于电池组主体底部的共享管路组件；共享管路组件，用于将若干单体电池的内腔全部贯通，以使电池组中所有单体电池均处于一个电解液体系下。该电池组通过共享管路组件能够加强电池组内各个单体电池电解液的均一性，提高循环寿命，还能通过该共享管路组件为电池组补充电解液，延长电池组的使用寿命，同时提高电池组的使用安全性。
但是，此类共享管路组件由多段子管路01以及中间连接管02相互间过盈配合直接进行密封插接形成；此时多段子管路01一一设置在单体电池下盖板03上，子管路沿单体电池1排布方向延伸，且与下盖板03一体挤压成型，并与下盖板03开孔相通。
装配时，将子管路01的两端作为与中间连接管02的连接端，两个单体电池连接时，两个单体电池上的子管路一端分别挤入中间连接管02的两端中。
该共享管路组件在插接过程中要求各个子管路01以及中间连接管02同轴，才能实现有效连接，但是，由于以下原因使得各个子管路以及中间连接管02的同轴度难以保证：
1)子管路与下盖板为一体件，若各个一体件上，子管路在下盖板的位置略有偏差，或各个子管路自身尺寸略有偏差，则会导致，插接时，各个子管路的同轴度出现偏差；
2)将上述一体件与筒体焊接时，会因为焊接过程的差异，有可能会出现子管路相对于筒体的位置出现不一致的情况，进而导致插接时，各个子管路同轴度出现偏差；
3)该方案，在插接时，需要利用专用工装，由于工装使用不当，或者因施工人员操作问题，稍有不慎，就会使得各个子管路的同轴度出现偏差；
另外，在插接时，各个子管路之间的偏差会随着插接数量的增多而加大，导致插接数量越多，各个子管路之间的同轴度越难以保证；导致装配过程中，成品率随着插接数量的增多而降低。
综上，该方案因相邻两个单体电池的子管路很难同轴所以在插接时，可能会导致子管路相对于下盖板发生位移，或导致下盖板相对于筒体发生位移，进而导致电池损坏。
发明内容
本申请的目的是提供一种大容量电池的制备工艺，克服现有大容量电池共享管路组件难以组装的问题。
本申请的技术方案是提供一种大容量电池的制备工艺，其特征在于，包括以下步骤：
加工外壳：
加工两端敞口的筒体；并在筒体顶板加工与各个单体电池极柱对应的第三通孔；
加工用于覆盖筒体敞口端的第一盖板和第三盖板；
单体电池装入筒体：
将多个单体电池排布在筒体内；使各个单体电池极柱伸出筒体上对应的第三通孔；
密封：
将各个第三通孔对应的外壳区域与相应单体电池壳体固定密封；将第一盖板和第三盖板分别密封连接在筒体两个相对的敞口端；
开包：
利用外力或者电解液自身，在单体电池壳体开孔，使电解液共享腔室内腔和各个单体电池内腔的电解液区贯通。
本申请将多个单体电池置于具有电解液共享腔室的筒体内部，利用盖板密封筒体，通过开包过程，在单体电池壳体开孔，使得电解液共享腔室和各个单体电池内腔的电解液区贯通，各单体电池电解液共享来保障各单体电池的一致性，即，将各单体电池的电解液腔连通，使所有单体电池的电解液处于同一体系下，减少了各单体电池电解液之间的差异，一定程度上提升了各单体电池之间的一致性，从而一定程度上提升了大容量电池的循环寿命。
本申请电解液共享腔室为位于筒体内的第一通道，无需插接，在单体电池排布方向，无需考虑插接同轴问题，对加工精度以及装配精度要求较低；同时无需专用工装，装配过程较为简单，大大降低了此类具有共享体系大容量电池的加工难度及加工成本，可实现批量化生产。
另外，本申请各个单体电池极柱伸出外壳顶部(为了确保，整体外壳的密封性，需要将极柱与外壳之间的间隙密封)。相对于极柱位于外壳内部的结构，极柱散热效果较好；另外，当极柱伸出外壳后，若电池温度过高，还便于后期利用换热设备将极柱的热量及时导出，可以确保此类大容量电池运行在最佳温度。
另外，本申请的大容量电池制作工艺相比现有电池模组制作时为了保持电池模组初始状态时多个单体电池的一致性相差较小，需要对各单体电池进行分容分选的操作；
而本申请中将多个单体电池直接安装在一个密封外壳内，且多个单体电池处于统一电解液体系内(相当于将多个单体电池构成了一个大容量的电池单体)，减小了各单体电池之间的差异性，因此该大容量电池的制作过程可以省略分容分选的工作，提升了大容量电池循环寿命的同时还提高了大容量电池的制作效率。
为了进一步地优化上述大容量电池的性能，开包步骤中还包括：
利用外力或者电解液自身，在单体电池壳体开孔，使气体腔室内腔和各个单体电池内腔的气体区贯通。
本申请在筒体内，形成第二通道，作为气体腔室；在开包过程中，在单体电池壳体开孔，使得各个单体电池内腔的气体区与气体腔室贯通，进而使得各单体电池气路连通，所有单体电池的气体处于同一环境下，达到气体平衡，减少了各单体电池之间的差异，提升了各单体电池之间的一致性，从进一步提升了大容量电池的循环寿命。
为了进一步地减小各个单体电池之间的差异性，单体电池装入筒体步骤中，将多个分容分选后的单体电池排布在筒体内。
本申请第一通道可以采用两种方式成型在筒体内，第二通道优选一种方式成型在筒体内：
第一通道的第一种成型方式和第二通道的成型方式类似，均可采用铝挤压工艺与两端敞口的筒体一体成型。那么，相应地，在上述加工外壳步骤中，可采用铝挤压工艺一体成型两端敞口的筒体，同时一体成型第一通道和第二通道，分别作为电解液共享腔室和气体腔室。
对应于采用铝挤压工艺成型的第一通道，为了确保各个单体电池的极柱能够伸出对应的第三通孔，可通过以下三种方式将多个单体电池装入筒体：
方式一：
将多个单体电池固定为一个整体，从筒体任意敞口端，推入筒体内腔；
利用托举工装从底部支撑多个单体电池，使各个单体电池的底部脱离筒体底部，各个单体电池的极柱伸出相应第三通孔；
沿筒体长度方向，插入长条状等高第二支撑筋，取出托举工装即可。
方式二：
将多个单体电池依次从筒体任意敞口端，推入筒体内腔，将每个单体电池推入到位；
在其底部与筒体底部之间插入各个垫块，确保该单体电池的极柱完全伸出对应第三通孔。
方式三：
将筒体翻转，使筒体顶部朝下，将多个单体电池固定为一个整体，从筒体任意敞口端，推入筒体内腔；或将多个单体电池依次从筒体任意敞口端，推入筒体内腔；
在重力作用下，各个单体电池的极柱伸出对应第三通孔，在各个单体电池底部和筒体底部之间插入第二支撑筋；翻转筒体，使筒体顶部朝上。
第一通道的第二种成型方式，不同于第一种成型方式，在单体电池装入筒体过程中成型，具体可采用以下三种方式：
方式一：
将多个单体电池固定为一个整体，从筒体任意敞口端，推入筒体内腔；利用托举工装从底部支撑多个单体电池，使各个单体电池的底部脱离筒体底部，各个单体电池的极柱伸出相应第三通孔；
沿筒体长度方向，将至少两根第一支撑筋插入各个单体电池底部与筒体底部之间，形成第一通道，作为电解液共享腔室，并确保各个单体电池的极柱伸出相应第三通孔；
取出托举工装。
方式二：
将多个单体电池依次从筒体任意敞口端，推入筒体内腔，将每个单体电池推入到位后，在其底部与筒体底部之间插入各个垫块，形成电解液共享腔室的同时确保该单体电池的极柱完全伸出对应第三通孔。
方式三：
将筒体翻转，使筒体顶部朝下，将多个单体电池固定为一个整体，从筒体任意敞口端，推入筒体内腔；或将多个单体电池依次从筒体任意敞口端，推入筒体内腔；
在重力作用下，各个单体电池的极柱伸出对应第三通孔，在各个单体电池底部和筒体底部之间插入至少两根第一支撑筋，形成电解液共享腔室；
翻转筒体，使筒体顶部朝上。
进一步地，为了形成了更完整的SEI膜,使大容量电池具有更稳定的循环能力，开包过程中，利用外力或电解液自身在单体电池壳体开孔，电解液共享腔室内腔和各个单体电池内腔的电解液区贯通后，还包括通过电解液共享腔室向各个单体电池内腔注入电解液，对整个大容量电池进行化成的步骤。
本申请的有益效果是：
本申请将具有密封组件的多个分容分选后的单体电池置于具有电解液共享腔室的筒体内部，利用盖板密封筒体，通过开包过程，在单体电池壳体开孔，使得电解液共享腔室和各个单体电池内腔的电解液区贯通，各单体电池电解液共享来保障各单体电池的一致性，即，将各单体电池的电解液腔连通，使所有单体电池的电解液处于同一体系下，减少了各单体电池电解液之间的差异，一定程度上提升了各单体电池之间的一致性，从而一定程度上提升了大容量电池的循环寿命。
本申请电解液共享腔室无需插接，在单体电池排布方向，无需考虑插接同轴问题，对加工精度以及装配精度要求较低；同时无需专用工装，装配过程较为简单，大大降低了此类具有共享体系大容量电池的加工难度及加工成本，可实现批量化生产。
另外，本申请各个单体电池极柱伸出外壳顶部(为了确保，整体外壳的密封性，需要将极柱与外壳之间的间隙密封)。相对于极柱位于外壳内部的结构，极柱散热效果较好；另外，当极柱伸出外壳后，若电池温度过高，还便于后期利用换热设备将极柱的热量及时导出，可以确保此类大容量电池运行在最佳温度。
附图说明
图1为背景技术中大容量电池结构示意图；
图2为实施例1中去除外壳后的大容量电池结构示意图；
图3为实施例1中大容量电池结构示意图；
图4为实施例1中市售方壳电池结构示意图；
图5为实施例1中一种电解液共享腔室结构示意图；
图6为实施例1中另一种电解液共享腔室结构示意图；
图7为实施例1中第三种电解液共享腔室结构示意图；
图8为实施例1中第三盖板结构示意图；
图9为实施例1中具有传热连接件的大容量电池的结构示意图；
图10为实施例1中传热连接件的结构示意图；
图11为实施例2中大容量电池结构示意图；
图12为实施例2中第三盖板结构示意图；
图13为实施例3中一种筒体结构示意图；
图14为实施例3中另一种筒体结构示意图；
图15为实施例4中在U形壳体内腔增设隔板的结构示意图；
图16为实施例4中工字形隔板与单体电池配合的结构示意图；
图中附图标记为：
01、子管路；02、中间连接管；03、下盖板；
1、单体电池；2、U形壳体；3、第一盖板；4、第三盖板；5、第二盖板；6、U形壳体底部；7、管段；8、第一通道；9、翅片；10、第一支撑筋；11、注液口；12、第三通孔；13、第二通道；15、薄弱部；16、隔板；17、竖梁；18、横梁；19、传热连接件。
具体实施方式
为使本申请的上述目的、特征和优点能够更加明显易懂，下面结合说明书附图对本申请的具体实施方式做详细的说明，显然所描述的实施例是本申请的一部分实施例，而不是全部实施例。基于本申请中的实施例，本领域普通人员在没有做出创造性劳动前提下所获得的所有其他实施例，都应当属于本申请的保护的范围。
在下面的描述中阐述了很多具体细节以便于充分理解本申请，但是本申请还可以采用其他不同于在此描述的其它方式来实施，本领域技术人员可以在不违背本申请内涵的情况下做类似推广，因此本申请不受下面公开的具体实施例的限制。
在本申请的描述中，需要说明的是，术语中的“顶、底”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、第三、第四等”仅用于描述目的，而不能理解为指示或暗示相对重要性。
为了便于描述，以下实施例中将外壳长度方向定义为x方向，外壳宽度方向定义为y方向，外壳高度方向定义为z方向。
实施例1
如图2及图3所示，本实施例大容量电池，包括9个并联的单体电池1，其他实施例中数量可根据实际需求进行调整。结合图4，该单体电池1为方壳电池，方壳电池包括上盖板、下盖板、筒体和电芯组件；此处所述电芯组件也可以称之为电极组件，由正极、隔膜、负极顺序排列，采用叠片或卷绕工艺装配而成。上盖板、筒体、下盖板组成了单体电池1壳体，电芯组件设置在单体电池1壳体内。
各个单体电池1的壳体底部开设贯通其内腔的第一通孔；
结合图3，本实施例外壳包括U形壳体2、第一盖板3、第三盖板4和第二盖板5；其中U形壳体2与第二盖板5分体设置。
在U形壳体底部6设有沿x方向延伸的电解液共享腔室；
电解液共享腔室可以采用以下几种结构形式：
第一种结构、如图5所示，在U形壳体底部6外表面固定截面为方形或者圆形的管段7；在管壁以及U形壳体底部6开设通孔；该通孔可以为多个，与各个单体电池第一通孔一一对应且贯通；也可以为一个与所有单体电池第一通孔均贯通的长条形通孔。
第二种结构、如图6和图7所示，在U形壳体底部6设沿x方向延伸的第一通道8，第一通道8直接与各个单体电池1第一通孔贯通；相对于第一种结构需要单独设置管段，同时需要在U形壳体底部6和管段上开设通孔，第二种结构加工、制作较为简单。
第二种结构可采用以下两种方式实现：
方式一，如图6所示，可以采用折弯、冲压、压铸或铝挤压工艺，直接在U形壳体底部6成型第一通道8，将U形壳体底部6内表面向远离U形壳体2顶部的方向凸起形成。
为了能够实现有效散热，在U形壳体底部6外表面且位于第一通道8两侧的位置设置沿x方向延伸的散热翅片9，大容量电池运行过程中产生的热量可以通过翅片9及时散出。
方式二，如图7所示，在U形壳体底部6内表面设至少两个沿x方向延伸的第一支撑筋10，两个第一支撑筋10与位于两个第一支撑筋10之间的U形壳体底部6区域构成第一通道8。
采用图7所示的电解液共享腔室结构，可以确保整个大容量电池的结构规整性，同上，一方面，易于基于此类大容量电池集成储能设备时储能设备密度可以得以保证；另一方面，可以将其作为一个整体，在其外部包覆绝缘膜(也可称为蓝膜或保护膜)，提高此类大容量电池的整体安全性能。
图6和图7中的第一通道8位于yz平面的两端为敞口端，后续通过第一盖板3和第三盖板4密封两端的敞口；在其他实施例中，第一通道8位于yz平面的两端也可直接为封端闭，但是相对成型方式较为复杂。
本实施例还可以在第一通道8设有注液口11(参见图3)，当各个单体电池1内腔和电解液共享腔室连通后，可以通过该注液口11向各个单体电池1内腔和电解液共享腔室 内再次注入电解液，以保证电解液的连续性，后期还可以通过该注液口11实现换液。
需要说明的是，在不注液的情况，需要通过堵头对该注液口11进行密封。
第三种结构、将U形壳体底部6内表面与各个单体电池下盖板外表面之间的间隙作为电解液共享腔室，若采用该结构，需要利用辅助结构提高各个单体电池在外壳中的稳定性。
本实施例第二盖板5的结构如图8所示，第二盖板5上开设能够使各个单体电池1极柱伸出的第三通孔12；第二盖板5覆盖在U形壳体2的顶部敞口端，并与该敞口端密封连接；各个单体电池1极柱伸出第三通孔12后，第三通孔12对应的外壳区域与单体电池壳体固定密封。可以将第三通孔12边沿与极柱周边区域的单体电池壳体焊接实现密封；
若各个单体电池1沿z方向的尺寸不完全相等，部分z方向尺寸较小的单体电池1的壳体与大容量电池外壳可能存在虚焊甚至无法焊接的问题，而难以保证第三通孔12与单体电池壳体密封性。
为了克服此类问题，可以在第三通孔12的周边区域设置薄弱部15，在焊接过程中，通过薄弱部15的变形，补偿各个单体电池在z方向的尺寸差，使得所有单体电池1的极柱伸出第三通孔12。本实施例中的薄弱部15可以为以第三通孔12中心为中心点，沿第三通孔12周边区域开设的环形凹槽。其他实施例中，薄弱部15还可以为开设在第三通孔12周边区域的长条形凹槽。在其他实施例中，若存在类似的问题，即所有单体电池1极柱不能同时完全伸出第三通孔12，均可采用在第三通孔12周边区域增设薄弱部15的方案来解决。
也可以在第三通孔12和极柱之间增设密封连接件，该密封连接件包括中空构件；该中空构件的底部用于和单体电池的第一区域密封连接，中空构件的顶部与所述外壳的第二区域密封连接；第一区域为位于所述任一单体电池的上盖板中任一极柱周边的区域；所述第二区域为位于外壳上任一一个第三通孔对应的区域。第三通孔对应的区域为外壳外表面上对应任一一个第三通孔的周边区域；或者第三通孔对应的区域为第三通孔孔壁。其中，极柱周边的区域即为极柱上绝缘密封垫周边的区域。该绝缘密封垫为单体电池上用于使极柱和上盖板之间绝缘的零件。
第二盖板5的形状与U形壳体2顶部敞口端形状相适配，本实施例中为方形壳体，因此该平板为方形平板，面积可以略大于U形壳体2顶部敞口端面积，通过熔焊的方式将其固定在U形壳体2顶部敞口端；面积也可以略小于U形壳体2顶部敞口端面积，通过嵌焊的方式将其固定在U形壳体2顶部敞口端。
本实施例的大容量电池可通过以下过程制备：
步骤一、加工U形壳体2、第一盖板3、第三盖板4和第二盖板5。
步骤二、分容分选，筛选满足要求的多个单体电池；在单体电池壳体底部开设第一通孔后利用密封组件密封；将多个第一通孔处具有密封组件的单体电池排布在步骤一的U形壳体2内，每个单体电池的密封组件与第一通道8对应，以确保利用外力或者电解液自身 打开密封组件后，各个单体电池内腔的电解液区与第一通道8贯通；密封组件可以采用中国专利CN218525645U、CN218525614U公开的密封组件。
步骤三、将第二盖板5密封焊接在U形壳体2顶部敞口端，焊接第三通孔12与单体电池壳体极柱周边部位，将第一盖板3和第三盖板4焊接在U形壳体2另外两个相对的敞口端，实现密封。此处需要注意的是，第一盖板3和第三盖板4需同时密封第一通道8位于yz平面的两个敞口端。还可以采用螺钉紧固或者胶粘的方式将第一盖板、第二盖板以及第三盖板固定在U形壳体2的敞口端，但是相对于焊接方式，密封性或连接可靠性相对较弱。
步骤四、利用外力或者电解液自身打开密封组件，第一通道8内腔和各个单体电池内腔的电解液区贯通。
在各个单体电池1内腔和第一通道8贯通后，各个单体电池1内腔的电解液均通过第一通道8连通，为了防止出现电解液中断的现象，可以在各个单体电池1内腔和第一通道8贯通后，向第一通道8注入电解液来保证电解液的连续性。
之后将所有单体电池1并联。具体可以采用图9和图10所示的传热连接件将所有单体电池1并联，传热连接件为一根细长构件，该细长构件用于和各个单体电池的正极或负极连接；且，细长构件上沿着轴向方向设置有用于安装传热管的装夹部。通过传热连接件将多个单体电池的正极或负极连接起来，并且在传热连接件上装夹传热管，可以对每个单体电池上极柱局部温度的控制，大大降低极柱温度过高而导致热失控现象的发生。
为了形成了更完整的SEI膜,使大容量电池具有更稳定的循环能力，可以通过第一通道8向各个单体电池1内腔注入电解液后，对整个大容量电池进行化成。
实施例2
与实施例1大容量电池不同的是，本实施例通过在第二盖板5上增设气体腔室，作为气体共享腔室或者泄爆通道。其结构如图11所示，图11中第一通道8采用图7所示结构，当然，第一通道8也可以采用图6所示结构。
气体腔室可以采用以下几种结构形式：
一、在第二盖板5顶部外表面固定截面为方形或者圆形的管段；在管壁以及第二盖板5开设有通孔；
二、将第二盖板5内表面与各个单体电池上盖板外表面之间的间隙作为气体腔室。
三、如图12所示，在第二盖板5设沿x方向延伸的第二通道13；该结构相对于第一种结构，较为简单，相对于第二种结构，各个单体电池在外壳内的稳定性较高。
可以采用折弯或铝挤压工艺，直接在第二盖板5成型第二通道13，其中第二通道13向远离U形壳体底部6的方向凸起。
当第二通道13作为气体共享腔室时，需要在各个单体电池1壳体顶部开设贯通单体电池1内腔的第五通孔，第二通道13与第五通孔贯通，第二通道13通过第五通孔与各个 单体电池1内腔的气体区连通。在其他实施例中，第二盖板5与U形壳体2顶部敞口端还可以采用粘接或者螺钉连接方式实现固定，但是相对于焊接的方式，密封性或连接可靠性相对较弱。需要说明的是，在运行过程中，需要封堵第二通道13两端敞口(与yz平面平行的敞口端)，避免外部环境对各个单体电池内腔的电解液造成影响。
本实施例在第二通道13上设置排气阀和泄爆膜，或只设置排气阀；排气阀可手动或自动开启，定期开启排气阀，各单体电池1中气体区内的气体可经第二通道13及排气阀后排出；当设置泄爆膜时，排气阀和泄爆膜位于第二通道13的两端，泄爆膜用于在任意单体电池1发生热失控时，热失控烟气冲破泄爆膜排出第二通道13，使得此类大容量电池具有较高的安全性能。
可通过以下过程制备：
需要在实施例1制备过程的基础上，在各个单体电池顶部开设第五通孔后利用密封组件密封；将多个第五通孔处具有密封组件的单体电池排布在U形壳体2内；将第二盖板5密封焊接在U形壳体2顶部敞口端，使得具有密封组件的第五通孔与第二通道13对应，确保利用外力或者电解液自身打开密封组件后，第五通孔与第二通道13贯通；密封组件可以采用中国专利CN218525645U、CN218525614U公开的密封组件，焊接第三通孔12与单体电池壳体极柱周边部位，实现密封。最后利用外力或者电解液自身打开密封组件，第二通道13内腔和各个单体电池内腔的气体区连通。
当第二通道13作为泄爆通道时，第二通道13覆盖各个单体电池1顶部泄爆部，当任一单体电池1泄爆部被内腔烟气冲破时，该单体电池1内腔的气体区与第二通道13内腔连通；
可通过以下过程制备：
需要在实施例1制备过程的基础上，将第二盖板5密封焊接在U形壳体2顶部敞口端，使得各个单体电池的泄爆部与第二通道13对应，确保泄爆部被内腔烟气冲破后，泄爆部与第二通道13贯通；焊接第三通孔12与单体电池壳体极柱周边部位，实现密封。
需要说明的是，本实施例所述的泄爆部包括设置在单体电池1顶部的具有泄爆膜的泄爆口或防爆口等。
实施例3
与上述实施例不同的是，本实施例U形壳体2与第二盖板5为一体件，该一体件的结构如图13和图14所示。第二盖板5可以设气体腔室也可不设，以下以设有气体腔室为例进行说明：
可以理解为本实施例的外壳包括图13或图14所示的筒体以及用于覆盖筒体相对两个敞口端的第一盖板3和第三盖板4；第一盖板3和第三盖板4位于yz平面，同样，此处需要说明的是，第一盖板3和第三盖板4在覆盖密封筒体相对两个敞口端的同时，需覆盖密封第一通道8和第二通道13的相对两个敞口端。
本实施例筒体可以采用铝挤压工艺一体成型；因筒体沿x方向延伸，其敞口端位于yz平面，挤压方向沿x方向进行，因此，可以一次挤压成型满足目标长度的筒体。
需要说明的是：在挤压图13所示的筒体时，无需同时成型第一通道8，即第一支撑筋10与筒体需要分体设置；在挤压图14所示筒体时，需同时成型第一通道8。
本实施例的大容量电池可通过以下过程制备，以图14所示结构为例：
步骤一、加工外壳：
加工筒体、第一盖板3和第三盖板4。
步骤二、预制单体电池：
分容分选，筛选满足要求的多个单体电池；在单体电池壳体底部开设第一通孔后利用密封组件密封；在单体电池壳体顶部开设第五通孔后利用密封组件密封；
步骤三、预制单体电池装入筒体：
将多个具有密封组件的单体电池排布在步骤一的筒体内；使得具有密封组件的第一通孔与第一通道8对应，具有密封组件的第五通孔与第二通道13对应，确保利用外力或者电解液自身打开密封组件后，第一通孔与第一通道8贯通，第五通孔与第二通道13贯通；密封组件可以采用中国专利CN218525645U、CN218525614U公开的密封组件。各个单体电池1极柱伸出第二盖板5上对应的第三通孔12。
步骤四、密封：
焊接第三通孔12与单体电池壳体极柱周边部位，实现密封；此处需要注意的是，为了各个单体电池1能够顺利排布在图14所示筒体内，筒体沿z方向的最小尺寸需要大于单体电池1沿z方向的尺寸，同时为了确保各个单体电池1的极柱能够伸出筒体顶部的第三通孔12，需要在各个单体电池1底部增设第二支撑筋；
可通过以下三种方式将多个具有密封组件的单体电池排布在步骤一的筒体内：
1)、选用长条状等高第二支撑筋；
将多个单体电池1固定为一个整体，从筒体任意敞口端，推入筒体内腔；此时，各个单体电池1的底部与筒体底部接触，各个单体电池1的极柱与相应第三通孔12对应，但没有伸出第三通孔12；之后利用托举工装从底部支撑多个单体电池1，使各个单体电池1的底部脱离筒体底部，各个单体电池1的极柱伸出相应第三通孔12；之后，沿x方向，插入长条状等高第二支撑筋，取出托举工装即可。
需要说明的是，在z方向上，长条状等高第二支撑筋的尺寸需满足：保证在各个单体电池1底部与筒体底部之间增设第二支撑筋后，各个单体电池1的极柱伸出对应第三通孔12。
2)、选用多个与单体电池1一一对应的多个垫块构成第二支撑筋；
将多个单体电池1依次从筒体任意敞口端，推入筒体内腔，将每个单体电池1推入到位后，需要在其底部与筒体底部之间插入各个垫块，确保该单体电池1的极柱完全伸出对 应第三通孔12，大多数情况下此方式下各单体电池对应的垫块在z方向的尺寸不同。
3)、各个单体电池1倒置推入筒体内腔；
将筒体翻转，使筒体顶部朝下，将多个单体电池1固定为一个整体，从筒体任意敞口端，推入筒体内腔；或将多个单体电池1依次从筒体任意敞口端，推入筒体内腔；在重力作用下，各个单体电池1的极柱伸出对应第三通孔12，在各个单体电池1底部和筒体底部之间插入第二支撑筋；翻转筒体，使筒体顶部朝上。
将第一盖板3和第三盖板4焊接在U形壳体2另外两个相对的敞口端。
步骤五、开包：
利用外力或者电解液自身打开密封组件，第一通道8内腔和各个单体电池内腔的电解液区贯通，第二通道13内腔和各个单体电池内腔的气体区贯通。
在各个单体电池1内腔和第一通道8贯通后，各个单体电池1内腔的电解液均通过第一通道8连通，为了防止出现电解液中断的现象，可以在各个单体电池1内腔和第一通道8贯通后，向第一通道8注入电解液来保证电解液的连续性。
之后将所有单体电池1并联。
为了形成了更完整的SEI膜,使大容量电池具有更稳定的循环能力，通过第一通道8向各个单体电池1内腔注入电解液后，对整个大容量电池进行化成。
如果气体腔室作为泄爆通道，与上述步骤不同的是：
上述步骤中，无需在单体电池壳体顶部开设第五通孔；将多个第一通孔处具有密封组件的单体电池排布在步骤一的筒体内；使得具有密封组件的第一通孔与第一通道8对应，确保利用外力或者电解液自身打开密封组件后，第一通孔与第一通道8贯通，各个单体电池顶部泄爆部与第二通道13对应，确保泄爆部被内腔烟气冲破后，泄爆部与第二通道13贯通。
利用外力或者电解液自身打开密封组件，第一通道8内腔和各个单体电池内腔的电解液区贯通。
如果采用图13所示筒体，将多个具有密封组件的单体电池排布在图13所示筒体内后，将第一支撑筋10插入各个单体电池底部与筒体底部之间，形成第一通道8的同时，可以对各个单体电池进行支撑，使得各个单体电池1的极柱能够伸出筒体顶部的第三通孔12。也可采用与上述相同的三种方式将多个具有密封组件的单体电池排布在图13所示筒体内，只需将上述第二支撑筋替换为第一支撑筋10即可。
具体可包括以下步骤：
步骤一、加工筒体、第一盖板3和第三盖板4。
步骤二、分容分选，筛选满足要求的多个单体电池；在单体电池壳体底部开设第一通孔后利用密封组件密封；在单体电池壳体顶部开设第五通孔后利用密封组件密封；
将多个具有密封组件的单体电池排布在步骤一的筒体内；将第一支撑筋10插入各个 单体电池底部与筒体底部之间，形成第一通道8；
使得具有密封组件的第一通孔与第一通道8对应，具有密封组件的第五通孔与第二通道13对应，确保利用外力或者电解液自身打开密封组件后，第一通孔与第一通道8贯通，第五通孔与第二通道13贯通；密封组件可以采用中国专利CN218525645U、CN218525614U公开的密封组件。
并使得各个单体电池1极柱伸出第二盖板5上对应的第三通孔12，并焊接第三通孔12与单体电池壳体极柱周边部位，实现密封；
可通过以下三种方式将多个具有密封组件的单体电池排布在步骤一的筒体内：
1)、选用长条状等高第一支撑筋；
将多个单体电池1固定为一个整体，从筒体任意敞口端，推入筒体内腔；此时，各个单体电池1的底部与筒体底部接触，各个单体电池1的极柱与相应第三通孔12对应，但没有伸出第三通孔12；之后利用托举工装从底部支撑多个单体电池1，使各个单体电池1的底部脱离筒体底部，各个单体电池1的极柱伸出相应第三通孔12；之后，沿x方向，插入至少两条长条状等高第一支撑筋，两个第一支撑筋10与位于两个第一支撑筋10之间的筒体底部区域构成第一通道8，取出托举工装即可。
需要说明的是，在z方向上，长条状等高第一支撑筋的尺寸需满足：保证在各个单体电池1底部与筒体底部之间增设第一支撑筋后，各个单体电池1的极柱伸出对应第三通孔12。
2)、选用多个与单体电池1一一对应的多个垫块构成第一支撑筋；
将多个单体电池1依次从筒体任意敞口端，推入筒体内腔，将每个单体电池1推入到位后，需要在其底部与筒体底部之间插入各个垫块，确保该单体电池1的极柱完全伸出对应第三通孔12，大多数情况下此方式下各单体电池对应的垫块在z方向的尺寸不同。
3)、各个单体电池1倒置推入筒体内腔；
将筒体翻转，使筒体顶部朝下，将多个单体电池1固定为一个整体，从筒体任意敞口端，推入筒体内腔；或将多个单体电池1依次从筒体任意敞口端，推入筒体内腔；在重力作用下，各个单体电池1的极柱伸出对应第三通孔12，在各个单体电池1底部和筒体底部之间插入第一支撑筋；翻转筒体，使筒体顶部朝上。
步骤三、将第一盖板3和第三盖板4焊接在U形壳体2另外两个相对的敞口端。
步骤四、利用外力或者电解液自身打开密封组件，第一通道8内腔和各个单体电池内腔的电解液区贯通，第二通道13内腔和各个单体电池内腔的气体区贯通。
在各个单体电池1内腔和第一通道8贯通后，各个单体电池1内腔的电解液均通过第一通道8连通，为了防止出现电解液中断的现象，可以在各个单体电池1内腔和第一通道8贯通后，向第一通道8注入电解液来保证电解液的连续性。
之后将所有单体电池1并联。
实施例4
本实施例在上述实施例的基础上，在U形壳体2内腔或筒体内腔增设多个隔板16，将U形壳体2内腔或筒体内腔分割为多个单体电池1安装腔，见图15和图16；隔板16可采用平板，也可采用如图16所示的工字形隔板，工字形隔板的竖梁17与第一盖板3和第三盖板4平行，并与两个单体电池1相邻的位于yz平面的侧壁接触，工字形隔板的一个横梁18与所述两个单体电池1位于xz平面的侧壁接触，工字形隔板的另一个横梁18与所述两个单体电池1位于xz平面的另一侧壁接触。通过增设工字形隔板可以提高各个单体电池1在单体电池1安装腔内的稳定性。
本实施例中每个单体电池1安装腔内固定有一个单体电池1，靠近中间部位的每个单体电池1，其两侧的侧壁均和隔板16接触，靠近最外侧的两个单体电池1，其中一个侧壁和隔板16接触，另一侧壁和第一盖板3或第三盖板4接触，第一方面可提高各个单体电池1在壳体内的安装稳定性；第二方面，可以防止各个单体电池1鼓胀，而导致大容量电池循环性能降低的问题出现；第三方面，各个单体电池1充放电过程中产生的热量可以通过隔板16传输至外部，降低热失控发生的风险；第四方面还可以增强外壳的整体强度。在其他实施例中每个单体电池1安装腔内还可以固定有两个或者两个以上的单体电池1。但是相对于本实施例单体电池1稳定性较差。

Claims (12)

  1. 一种大容量电池的制备工艺，其特征在于，包括以下步骤：
    加工外壳：
    加工两端敞口的筒体，并在筒体顶板加工与各个单体电池极柱对应的第三通孔；
    加工用于覆盖筒体敞口端的第一盖板和第三盖板；
    单体电池装入筒体：
    将多个单体电池排布在筒体内；使各个单体电池极柱伸出筒体顶板上对应的第三通孔；
    密封：
    将各个第三通孔对应的外壳区域与相应单体电池壳体固定密封；将第一盖板和第三盖板分别密封连接在筒体两个相对的敞口端；
    开包：
    利用外力或者电解液自身，在单体电池壳体开孔，使电解液共享腔室内腔和各个单体电池内腔的电解液区贯通。
  2. 根据权利要求1所述的大容量电池的制备工艺，其特征在于：
    开包步骤中还包括：
    利用外力或者电解液自身，在单体电池壳体开孔，使气体腔室内腔和各个单体电池内腔的气体区贯通。
  3. 根据权利要求2所述的大容量电池的制备工艺，其特征在于，单体电池装入筒体步骤中，将多个分容分选后的单体电池排布在筒体内。
  4. 根据权利要求2所述的大容量电池的制备工艺，其特征在于，加工外壳步骤中，采用铝挤压工艺一体成型两端敞口的筒体，同时一体成型第一通道和第二通道，分别作为电解液共享腔室和气体腔室。
  5. 根据权利要求4所述的大容量电池的制备工艺，其特征在于，单体电池装入筒体步骤具体包括：
    将多个单体电池固定为一个整体，从筒体任意敞口端，推入筒体内腔；
    利用托举工装从底部支撑多个单体电池，使各个单体电池的底部脱离筒体底部，各个单体电池的极柱伸出相应第三通孔；
    沿筒体长度方向，插入长条状等高第二支撑筋，取出托举工装。
  6. 根据权利要求4所述的大容量电池的制备工艺，其特征在于，单体电池装入筒体步骤具体包括：
    将多个单体电池依次从筒体任意敞口端，推入筒体内腔，将每个单体电池推入到位；
    在其底部与筒体底部之间插入各个垫块，确保该单体电池的极柱完全伸出对应第三通孔。
  7. 根据权利要求4所述的大容量电池的制备工艺，其特征在于，单体电池装入筒体步骤具体包括：
    将筒体翻转，使筒体顶部朝下，将多个单体电池固定为一个整体，从筒体任意敞口端，推入筒体内腔；或将多个单体电池依次从筒体任意敞口端，推入筒体内腔；
    在重力作用下，各个单体电池的极柱伸出对应第三通孔，在各个单体电池底部和筒体底部之间插入第二支撑筋；翻转筒体，使筒体顶部朝上。
  8. 根据权利要求2所述的大容量电池的制备工艺，其特征在于，加工外壳步骤中，采用铝挤压工艺一体成型两端敞口的筒体，同时一体成型第二通道，作为气体腔室。
  9. 根据权利要求8所述的大容量电池的制备工艺，其特征在于，单体电池装入筒体步骤具体包括：
    将多个单体电池固定为一个整体，从筒体任意敞口端，推入筒体内腔；利用托举工装从底部支撑多个单体电池，使各个单体电池的底部脱离筒体底部，各个单体电池的极柱伸出相应第三通孔；
    沿筒体长度方向，将至少两根第一支撑筋插入各个单体电池底部与筒体底部之间，形成第一通道，作为电解液共享腔室，并确保各个单体电池的极柱伸出相应第三通孔；
    取出托举工装。
  10. 根据权利要求8所述的大容量电池的制备工艺，其特征在于，单体电池装入筒体步骤具体包括：
    将多个单体电池依次从筒体任意敞口端，推入筒体内腔，将每个单体电池推入到位后，在其底部与筒体底部之间插入各个垫块，形成电解液共享腔室的同时确保该单体电池的极柱伸出相应第三通孔。
  11. 根据权利要求8所述的大容量电池的制备工艺，其特征在于，单体电池装入筒体步骤具体包括：
    将筒体翻转，使筒体顶部朝下，将多个单体电池固定为一个整体，从筒体任意敞口端，推入筒体内腔；或将多个单体电池依次从筒体任意敞口端，推入筒体内腔；
    在重力作用下，各个单体电池的极柱伸出对应第三通孔，在各个单体电池底部和筒体底部之间插入至少两根第一支撑筋，形成电解液共享腔室；
    翻转筒体，使筒体顶部朝上。
  12. 根据权利要求1-11任一项所述的大容量电池的制备工艺，其特征在于，开包过程中，利用外力或电解液自身在单体电池壳体开孔，电解液共享腔室内腔和各个单体电池内腔的电解液区贯通后，还包括通过电解液共享腔室向各个单体电池内腔注入电解液，对整个大容量电池进行化成的步骤。
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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20120014993A (ko) * 2010-08-11 2012-02-21 세방전지(주) 축전지용 극주 실링 장치 및 그 방법
CN115275457A (zh) * 2022-08-29 2022-11-01 陕西奥林波斯电力能源有限责任公司 一种电池壳体及大容量电池
CN115360476A (zh) * 2022-08-29 2022-11-18 陕西奥林波斯电力能源有限责任公司 一种电池壳体及电池
CN115621653A (zh) * 2022-09-27 2023-01-17 吴军 一种锂电池模组
CN116111201A (zh) * 2023-04-11 2023-05-12 陕西奥林波斯电力能源有限责任公司 一种大容量电池及该大容量电池的制作方法
CN117878492A (zh) * 2023-06-16 2024-04-12 陕西奥林波斯电力能源有限责任公司 一种大容量电池
CN117977079A (zh) * 2023-06-06 2024-05-03 双澳储能科技（西安）有限公司 一种大容量电池及外壳

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN211629200U (zh) * 2020-01-19 2020-10-02 蜂巢能源科技有限公司 电池包和具有它的车辆
CN217387264U (zh) * 2021-11-26 2022-09-06 谢钢 一种增加现有贫液式铅酸蓄电池电解液可利用总量的结构
CN217589191U (zh) * 2022-04-29 2022-10-14 陕西奥林波斯电力能源有限责任公司 一种电芯壳体、电池电芯和大容量电池
CN115566243A (zh) * 2022-09-07 2023-01-03 陕西奥林波斯电力能源有限责任公司 一种可共享电解液的软包电芯组及大容量电池

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20120014993A (ko) * 2010-08-11 2012-02-21 세방전지(주) 축전지용 극주 실링 장치 및 그 방법
CN115275457A (zh) * 2022-08-29 2022-11-01 陕西奥林波斯电力能源有限责任公司 一种电池壳体及大容量电池
CN115360476A (zh) * 2022-08-29 2022-11-18 陕西奥林波斯电力能源有限责任公司 一种电池壳体及电池
CN115621653A (zh) * 2022-09-27 2023-01-17 吴军 一种锂电池模组
CN116111201A (zh) * 2023-04-11 2023-05-12 陕西奥林波斯电力能源有限责任公司 一种大容量电池及该大容量电池的制作方法
CN117977079A (zh) * 2023-06-06 2024-05-03 双澳储能科技（西安）有限公司 一种大容量电池及外壳
CN117878492A (zh) * 2023-06-16 2024-04-12 陕西奥林波斯电力能源有限责任公司 一种大容量电池

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