WO2024251067A1 - Élément de connexion étanche et batterie à haute capacité - Google Patents

Élément de connexion étanche et batterie à haute capacité Download PDF

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Publication number
WO2024251067A1
WO2024251067A1 PCT/CN2024/096992 CN2024096992W WO2024251067A1 WO 2024251067 A1 WO2024251067 A1 WO 2024251067A1 CN 2024096992 W CN2024096992 W CN 2024096992W WO 2024251067 A1 WO2024251067 A1 WO 2024251067A1
Authority
WO
WIPO (PCT)
Prior art keywords
area
single cell
shell
battery
integrally formed
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/CN2024/096992
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English (en)
Chinese (zh)
Inventor
陈孟奇
雷政军
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
D Aus Energy Storage Technology Xian Co Ltd
Original Assignee
D Aus Energy Storage Technology Xian 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 D Aus Energy Storage Technology Xian Co Ltd filed Critical D Aus Energy Storage Technology Xian Co Ltd
Publication of WO2024251067A1 publication Critical patent/WO2024251067A1/fr
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
    • 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
    • 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
    • H01M50/233—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions
    • H01M50/24—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions adapted for protecting batteries from their environment, e.g. from corrosion
    • 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
    • H01M50/30—Arrangements for facilitating escape of gases
    • 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
    • H01M50/342—Non-re-sealable arrangements
    • H01M50/3425—Non-re-sealable arrangements in the form of rupturable membranes or weakened parts, e.g. pierced with the aid of a sharp member
    • 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
    • H01M50/383—Flame arresting or ignition-preventing means
    • 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

Definitions

  • the present application belongs to the field of batteries, and specifically relates to a sealed connector and a large-capacity battery.
  • the related art proposes a large-capacity battery, as shown in Figures 1 and 2, the large-capacity battery includes a shell 1 and a plurality of single cells 2; the plurality of single cells are placed in parallel in the shell 1, and a first through hole 3 for the single cell pole to extend out of the shell 1 is provided on the top plate of the shell 1 corresponding to the pole of each single cell 2; the shell 1 is provided with at least one shared chamber 4 connected to the inner cavity of each single cell 2;
  • the electrolyte of each single cell can be shared; as shown in FIG. 2 , when it is used to communicate with the gas area in the inner cavity of each single cell, it can be used to achieve gas balance of each single cell.
  • the shared chamber 4 allows each single cell to be in at least one of a unified electrolyte environment and a gas balance environment, thereby ensuring the uniformity of each single cell and improving the performance and cycle life of large-capacity batteries.
  • the sealing performance of the housing 1 is particularly important.
  • each first through hole 3 on the housing 1 and the corresponding upper cover assembly of the single cell 2 need to be sealed and welded to ensure the sealing at this position.
  • the current method is to weld the housing and the upper cover assembly of the single cell by laser welding in the surrounding area corresponding to each first through hole 3 (the circle at A in Figure 1 is the welding track).
  • the present application provides a sealing connector for sealingly connecting the shell of the large-capacity battery and the upper cover plate of any single cell, wherein the shell is provided with a plurality of first through holes for extending the poles of each single cell in the large-capacity battery; the sealing connector comprises a hollow member for being sleeved on the outside of the pole of the single cell; the bottom of the hollow member is used for sealingly connecting with the first area of the single cell, and the top of the hollow member is sealed with the second area of the shell;
  • the first area is an area located around any pole in the upper cover plate of any single battery
  • the second area is an area corresponding to any first through hole on the housing.
  • the hollow component When the hollow component is used in the present application, it is sleeved on the outside of the pole of the single cell, and the bottom is used for sealing connection with the upper cover of the single cell, and the top is used for sealing connection with the peripheral area of the first through hole corresponding to the pole on the outer shell.
  • the hollow component can seal and fix the outer shell and the upper cover of the single cell, thereby ensuring the sealing of the large-capacity battery outer shell, and solving the problem of cold welding or even failure to weld that may occur when directly laser welding the outer shell and the upper cover of the single cell.
  • a first annular plate for welding to the upper cover plate of the single cell is arranged on the outer side of the bottom of the hollow member.
  • the first annular plate is welded to the upper cover plate of the single cell, and then the top of the hollow member is directly welded to the hole wall of the first through hole, or the top of the hollow member is bent and welded to the area around the first through hole on the shell.
  • the hollow component and the first annular plate are integrally formed.
  • the hollow member comprises a second annular plate and a third annular plate arranged at the inner side of the bottom of the hollow member for welding with the first area; the inner diameter of the third annular plate is larger than the outer diameter of the insulating sealing pad arranged at the pole of the single cell.
  • the single cell When in use, the single cell can be placed in the shell first, and after ensuring that the single cell extends out of the first through hole, the hollow component can be placed in from the first through hole, ensuring that the third annular plate contacts the upper cover plate of the single cell, and after the second annular plate contacts the outer surface of the shell, the third annular plate and the first area, as well as the second annular plate and the second area can be welded respectively.
  • the hollow component, the second annular plate and the third annular plate are integrally formed.
  • a buffer deformation groove is provided on the side wall of the hollow component.
  • the buffer deformation groove not only provides a certain deformation margin for sealing and fixing, which can be used to compensate for the problem of welding problems caused by the large gap between the shell and the single battery, but also compensates for the coaxiality deviation between the single battery pole and the first through hole corresponding thereto; at the same time, when the large-capacity battery is subjected to external force or self-vibration, the buffer deformation groove itself has a certain buffering effect, ensuring the reliability of sealing and fixing.
  • the second aspect of the present application provides a large-capacity battery, comprising a housing and N single cells, N being greater than or equal to 2; the N single cells are arranged in parallel and are arranged as a whole inside the housing; the housing is provided with an electrolyte sharing chamber connected to the electrolyte area of each single cell; the improvement thereof is:
  • the bottom of the hollow member is sealed and connected to the first area of any single cell, and the top of the hollow member is sealed and connected to the second area of the shell; the pole of the single cell extends out of the hollow member, and insulation is maintained between the pole of the single cell and the hollow member.
  • the large-capacity battery can achieve at least one uniform state of gas balance and electrolyte sharing for each single cell by sharing the chamber, thereby making the large-capacity battery have a longer cycle life.
  • the large-capacity battery uses a hollow component to seal the outer shell and the single cell, which not only has good sealing performance but also is easy to assemble.
  • there is one shared chamber which is integrally formed on the top of the shell and communicates with the gas area of the inner cavity of each single battery, thereby enabling the large-capacity battery to have a gas balance function and ensuring the consistency of the gas of each single battery.
  • the large-capacity battery has the functions of electrolyte sharing and gas balance at the same time, which greatly improves the consistency of the gas of each single cell.
  • FIG1 is a schematic diagram of a first structural form of a large-capacity battery proposed in the related art in the background art
  • FIG2 is a schematic diagram of a second structure of a large-capacity battery proposed in the related art in the background art
  • FIG3 is a schematic diagram of a third structural form of a large-capacity battery proposed in the related art in the background art
  • FIG4 is a schematic structural diagram of a sealing connector provided in Example 1;
  • FIG5 is a schematic diagram of the sealing connector and the single battery after connection in Example 1;
  • FIG6 is a schematic diagram of the sealing connector and the large-capacity battery after being connected in Example 1;
  • FIG7 is a schematic structural diagram of a sealing connector provided in Example 2.
  • FIG8 is a cross-sectional view of a sealing connector with an additional buffer deformation groove
  • FIG9 is a perspective view of the outer shell of a large-capacity battery in Example 3.
  • FIG10 is a schematic structural diagram of the first cover plate in Example 3.
  • FIG11 is a schematic diagram of the structure of the U-shaped housing in Example 3.
  • FIG12 is a perspective view of a large-capacity battery in Example 5.
  • FIG13 is a perspective view of the outer shell of a large-capacity battery in Example 5.
  • FIG14 is a schematic diagram of the structure of the U-shaped housing in Example 5.
  • FIG15 is a schematic diagram of the structure of the second cover plate in Example 5.
  • FIG16 is a schematic diagram of the structure of a large-capacity battery in Example 6.
  • FIG. 17 is a schematic diagram of the structure of a large-capacity battery housing in Example 6.
  • orientations or positional relationships indicated by the terms "top, bottom, inside and outside” in the text are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the technical solution.
  • first, second or third are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.
  • the terms "installed, connected, connected” should be understood in a broad sense, for example: it can be a fixed connection, a detachable connection or an integral connection; it can also be a mechanical connection, an electrical connection or a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components.
  • installed, connected, connected should be understood in a broad sense, for example: it can be a fixed connection, a detachable connection or an integral connection; it can also be a mechanical connection, an electrical connection or a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components.
  • the present application adopts a sealing connector to solve the above problem.
  • the sealing connector includes a hollow component; the bottom of the hollow component is used to be sealed and connected to the first area of the single cell, and the top of the hollow component 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 first through hole on the shell.
  • the area corresponding to the first through hole is the peripheral area on the outer surface of the shell corresponding to any one of the first through holes; or the area corresponding to the first through hole is the hole wall of the first 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 battery used to insulate the pole from the upper cover.
  • the hollow member is generally a thin-walled tubular structure, which can be sealed and connected to the upper cover plate of the single cell and the outer shell of the large-capacity battery by bonding, riveting or welding.
  • the horizontal cross-section of the hollow member can be a rectangular ring or a circular ring. In order to better adapt to the shape of the first through hole and the pole, the cross-section of the hollow member is usually a circular ring.
  • welding is usually used to seal the hollow component with the shell and the upper cover of the single battery.
  • the upper cover assembly of the single battery and the hollow component after welding since the shell of the single battery is made of aluminum material, the hollow component and the shell of the large-capacity battery are also made of aluminum material.
  • sealing connector and the large-capacity battery using the sealing connector are specifically described below in combination with several embodiments.
  • the sealing connector 5 in this embodiment includes a hollow component 51 and a first annular plate 52 arranged at the bottom of the hollow component 51; the first annular plate 52 can be fixed to the outer side of the bottom of the hollow component 51 by welding, or the first annular plate 52 can be integrally formed on the bottom of the hollow component 51 by bending. For ease of processing, it is usually preferred to integrally form the first annular plate 52 on the hollow component 51 by bending.
  • the sealing connection 5 of this embodiment when the sealing connection 5 of this embodiment is used, the sealing connection 5 is first It is sleeved outside the pole of the single cell 2, and then the sealing connector 5 is welded to the upper cover of the single cell 2 by using the first annular plate 52.
  • this embodiment adopts the laser melting welding method, and then the welded single cell 2 is placed in the shell 1, and then the top of the sealing connector 5 on the single cell 2 is bent, so that the bent part is in contact with the upper surface of the shell 1, and finally the bent part and the shell are welded.
  • this embodiment also adopts the laser melting welding method.
  • first annular plate 52 is not provided on the top of the hollow component 51, laser welding cannot be used when welding the hollow component 51 to the upper cover plate, which may make the reliability and sealing of the welding part relatively weak.
  • a pole adapter 21 in order to allow the single cell pole to extend, can be added to the existing pole of the single cell by screw connection or welding to ensure that the pole can extend out of the housing.
  • the horizontal cross-section of the pole adapter 21 can be cylindrical or square.
  • the sealing connector 5 in this embodiment includes a hollow member 51, a second annular plate 53 is arranged on the outer side of the top of the hollow member, and a third annular plate 54 is arranged on the inner side of the bottom of the hollow member; the inner diameter of the third annular plate is larger than the outer diameter of the insulating sealing pad arranged at the pole of the single cell, and the outer diameter of the side wall of the hollow member 51 between the second annular plate 53 and the third annular plate 54 is smaller than the aperture of the first through hole 3 on the housing 1.
  • the second annular plate 53 and the third annular plate 54 can be respectively fixed to the top and bottom of the hollow member 51 by welding (the top can be the top of the hollow member or the part close to the top, preferably the top; the bottom is the bottom of the hollow member), or the second annular plate 53 and the third annular plate 54 can be integrally formed on the top and bottom of the hollow member 51 by bending. In order to facilitate processing, it is usually preferred to integrally form the second annular plate and the third annular plate on the hollow member by bending.
  • the single battery when the sealing connector of this embodiment is used, the single battery can be placed in the housing 1 first, and after the single battery 2 is ensured to extend out of the first through hole 3, the sealing connector 5 can be placed through the first through hole 3.
  • the third annular plate 54 is in contact with the upper cover of the single cell and the second annular plate 53 is in contact with the outer surface of the housing
  • the third annular plate 54 and the upper cover of the single cell, and the second annular plate 53 and the outer surface of the housing 1 are welded respectively.
  • the laser welding method is adopted in this embodiment.
  • this hollow component structure does not require additional bending operations, thereby improving work efficiency.
  • a buffer deformation groove 55 is also provided on the side wall of the hollow component 51 of this embodiment.
  • the buffer deformation groove 55 not only provides a certain deformation margin for sealing and fixing, which can be used to compensate for the problem of welding problems caused by the large gap between the shell and the single battery, but also compensates for the coaxiality deviation between the single battery pole and the corresponding first through hole; at the same time, when the large-capacity battery is subjected to external force or self-vibration, the buffer deformation groove itself has a certain buffering effect, ensuring the reliability of sealing and fixing.
  • the structure of the buffer deformation groove 55 can also be applied to the sealing connector of Example 1.
  • a large-capacity battery comprises a housing 1, N single cells 2 and 2N sealing connectors 5, where N is greater than or equal to 2; the N single cells 2 are arranged in parallel and are integrally arranged inside the housing 1; a shared chamber 4 communicating with the gas regions of each single cell 2 is arranged on the top of the housing 1;
  • the bottom of the sealing connector 5 is sealed to the first area of any single battery 2, and the top of the sealing connector 5 is sealed to the second area of the housing 1; the pole of the single battery 2 extends out of the sealing connector 5, and insulation is maintained between the pole and the sealing connector 5; the insulation method can be casting insulating glue, or insulating rubber sleeve.
  • the sealing connector 5 adopts the structural form in Embodiment 2, and of course the structure in Embodiment 1 is also applicable.
  • the enclosure can take the following three forms:
  • the housing 1 includes a cylinder 11, a first cover plate 12, and a second cover plate 13; the top and bottom of the cylinder 11 are both open, and the first cover plate 12 is sealed and fixed (welded) to the top of the cylinder 11.
  • the second cover plate 13 is sealed and fixed (welded) to the bottom of the cylinder 11;
  • a shared cavity and 2N first through holes 3 are integrally formed on the first cover plate 12 , and the 2N first through holes 3 are arranged on both sides of the shared cavity.
  • the housing 1 includes a U-shaped shell 14, a first cover plate 12, a third cover plate 15 and a fourth cover plate 16; the top, front and rear of the U-shaped shell 14 are open, the first cover plate 12 is sealed and fixed (welded) to the top of the U-shaped shell 14, and the third cover plate 15 and the fourth cover plate 16 are sealed and fixed (welded) to the front and rear of the U-shaped shell 14 respectively.
  • a shared cavity and 2N first through holes 3 are integrally formed on the first cover plate 12 , and the 2N first through holes 3 are arranged on both sides of the shared cavity.
  • the housing 1 includes a cylinder 11, a third cover plate 15, and a fourth cover plate 16; the front and rear of the cylinder 11 are both open, the third cover plate 15 is sealed and fixed (welded) to the front of the cylinder 11, and the fourth cover plate 16 is sealed and fixed (welded) to the rear of the cylinder;
  • a shared chamber and 2N first through holes 3 are integrally formed at the top of the cylinder 11 , and the 2N first through holes 3 are arranged on both sides of the shared chamber.
  • the cylinder 11 and the U-shaped shell 14 can be spliced by welding, or can be integrally formed by casting or stamping. In order to facilitate processing and ensure sealing, the integral forming method is usually selected.
  • the large-capacity battery structure of this embodiment is basically the same as that of Embodiment 3, except that the gas port of the single cell is the explosion venting part, and the shared chamber covers the explosion venting part.
  • the thermal runaway smoke breaks through the explosion venting port and can be discharged through the shared chamber.
  • the structure of the large-capacity battery in this embodiment is basically the same as that in embodiment 3, and there is only one shared chamber.
  • the shared chamber is arranged at the bottom of the shell, and is used to connect the electrolyte areas of the inner cavities of each single cell. Since each single cell shares the electrolyte, multiple single cells in this embodiment need to be arranged in parallel.
  • each single cell When the sealing mechanism on the lower cover assembly of each single cell is opened under the action of electrolyte or external force, the electrolyte area of each single cell is connected to the shared chamber, and then each single cell is in a common Under the same electrolyte system, the performance and cycle life of large-capacity batteries are improved.
  • the shell of a large-capacity battery can be constructed in the following three forms:
  • the housing 1 includes a cylinder 11, a first cover plate 12, and a second cover plate 13; the top and bottom of the cylinder 11 are both open, the first cover plate 12 is sealed and fixed (welded) to the top of the cylinder 11, and the second cover plate 13 is sealed and fixed (welded) to the bottom of the cylinder 11;
  • the first cover plate 12 is provided with 2N first through holes 3
  • the second cover plate 13 is integrally formed with a shared cavity.
  • the outer shell 1 includes a U-shaped shell 14, a first cover plate 12, a third cover plate 15 and a fourth cover plate 16; the top, front and rear of the U-shaped shell 14 are open, the first cover plate 12 is sealed and fixed (welded) to the top of the U-shaped shell 14, and the third cover plate 15 and the fourth cover plate 16 are sealed and fixed (welded) to the front and rear of the U-shaped shell 14 respectively.
  • the first cover plate 12 is provided with 2N first through holes 3 , and a shared cavity is integrally formed on the bottom of the U-shaped shell 14 .
  • the housing 1 includes a cylinder 11, a third cover plate 15, and a fourth cover plate 16; the front and rear of the cylinder 11 are both open, the third cover plate 15 is sealed and fixed (welded) to the front of the cylinder 11, and the fourth cover plate 16 is sealed and fixed (welded) to the rear of the cylinder;
  • the top of the cylinder 11 is provided with 2N first through holes 3 , and the bottom of the cylinder 11 is integrally formed with a shared chamber.
  • the cylinder 11 and the U-shaped shell 14 can be spliced by welding, or can be integrally formed by casting or stamping. In order to facilitate processing and ensure sealing, the integral forming method is usually selected.
  • this embodiment is based on the embodiment 5 (electrolyte can be shared), and a shared chamber 4 is added on the top of the shell; that is, the large-capacity battery of this embodiment has two shared chambers 4 .
  • the large-capacity battery When the shared chamber 4 added on the top of the shell is connected to the gas area in the inner cavity of each single cell, the large-capacity battery has the functions of electrolyte sharing and gas balance, which greatly improves the consistency of the gas in each single cell.
  • the large-capacity battery has the electrolyte sharing function and the single battery explosion venting function, which ensures the consistency of the electrolyte of each single battery and improves safety to a certain extent.
  • the housing 1 includes a cylinder 11, a first cover plate 12, and a second cover plate 13; the top and bottom of the cylinder 11 are both open, the first cover plate 12 is sealed and fixed (welded) to the top of the cylinder 11, and the second cover plate 13 is sealed and fixed (welded) to the bottom of the cylinder 11;
  • the first cover plate 12 is provided with 2N first through holes 3 and is integrally formed with a shared cavity.
  • the second cover plate 13 is also integrally formed with a shared cavity.
  • the housing 1 includes a U-shaped shell 14, a first cover plate 12, a third cover plate 15 and a fourth cover plate 16; the top, front and rear of the U-shaped shell 14 are open, the first cover plate 12 is sealed and fixed (welded) to the top of the U-shaped shell 14, and the third cover plate 15 and the fourth cover plate 16 are sealed and fixed (welded) to the front and rear of the U-shaped shell 14, respectively.
  • the first cover plate 12 is provided with 2N first through holes 3 and is integrally formed with a shared cavity.
  • the bottom of the U-shaped shell 14 is also integrally formed with a shared cavity.
  • the housing 1 includes a cylinder 11, a third cover plate 15, and a fourth cover plate 16; the front and rear of the cylinder 11 are both open, the third cover plate 14 is sealed and fixed (welded) to the front of the cylinder 11, and the fourth cover plate 16 is sealed and fixed (welded) to the rear of the cylinder;
  • the top of the cylinder 11 is provided with 2N first through holes 3 and a shared chamber is integrally formed therewith, and the bottom of the cylinder 11 is also integrally formed therewith with a shared chamber.
  • the cylinder 11 and the U-shaped shell 14 can be spliced by welding, or can be integrally formed by casting or stamping. In order to facilitate processing and ensure sealing, the integral forming method is usually selected.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Sealing Battery Cases Or Jackets (AREA)

Abstract

La présente demande concerne un élément de connexion étanche et une batterie à haute capacité. L'élément de connexion étanche est utilisé pour connecter de manière étanche un boîtier de la batterie à haute capacité et une plaque de couvercle supérieur d'un élément de batterie quelconque, et l'élément de connexion étanche comprend un composant creux utilisé pour être emmanché sur un montant de borne de l'élément de batterie ; la partie inférieure du composant creux est utilisée pour être en connexion étanche avec une première zone de l'élément de batterie, et la partie supérieure du composant creux est en connexion étanche avec une seconde zone du boîtier. L'élément de connexion étanche résout les problèmes liés à un soudage insuffisant entre les boîtiers et les plaques de couvercle supérieur, voire à l'impossibilité de réaliser un soudage par fusion laser en raison de la présence d'espaces entre les plaques de couvercle supérieur et les boîtiers des éléments de batterie de batteries à haute capacité existantes.
PCT/CN2024/096992 2023-06-06 2024-06-03 Élément de connexion étanche et batterie à haute capacité Ceased WO2024251067A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202310662889.9 2023-06-06
CN202310662889.9A CN117477188B (zh) 2023-06-06 2023-06-06 一种大容量电池

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WO2024251067A1 true WO2024251067A1 (fr) 2024-12-12

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WO (1) WO2024251067A1 (fr)

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Publication number Priority date Publication date Assignee Title
CN117673633B (zh) * 2023-06-06 2025-08-22 陕西奥林波斯电力能源有限责任公司 一种上盖组件、单体电池及大容量电池
CN117477188B (zh) * 2023-06-06 2025-08-22 陕西奥林波斯电力能源有限责任公司 一种大容量电池
WO2024251071A1 (fr) * 2023-06-06 2024-12-12 双澳储能科技（西安）有限公司 Batterie à haute capacité, élément de batterie, connecteur d'étanchéité et ensemble couvercle supérieur

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