WO2023050888A1 - Batterie et dispositif électrique - Google Patents

Batterie et dispositif électrique Download PDF

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Publication number
WO2023050888A1
WO2023050888A1 PCT/CN2022/098473 CN2022098473W WO2023050888A1 WO 2023050888 A1 WO2023050888 A1 WO 2023050888A1 CN 2022098473 W CN2022098473 W CN 2022098473W WO 2023050888 A1 WO2023050888 A1 WO 2023050888A1
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WO
WIPO (PCT)
Prior art keywords
housing
opening
battery
protrusion
cover
Prior art date
Application number
PCT/CN2022/098473
Other languages
English (en)
Chinese (zh)
Inventor
汪用广
黄仰枝
季进清
刘建华
林壮壮
Original Assignee
宁德时代新能源科技股份有限公司
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Filing date
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Application filed by 宁德时代新能源科技股份有限公司 filed Critical 宁德时代新能源科技股份有限公司
Publication of WO2023050888A1 publication Critical patent/WO2023050888A1/fr

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    • 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
    • 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
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/183—Sealing members
    • H01M50/184—Sealing members characterised by their shape or structure
    • 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
    • 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
    • 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
    • H01M50/249—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders specially adapted for aircraft or vehicles, e.g. cars or trains
    • 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 technical field of energy storage devices, in particular to a battery and an electrical device.
  • Battery cells are widely used in electronic equipment, such as mobile phones, laptop computers, battery cars, electric cars, electric airplanes, electric ships, electric toy cars, electric toy ships, electric toy airplanes and electric tools, etc.
  • the battery cells may include nickel-cadmium battery cells, nickel-hydrogen battery cells, lithium-ion battery cells, secondary alkaline zinc-manganese battery cells, and the like.
  • the battery cells When in use, the battery cells are generally accommodated in a box, and the box can prevent liquid or other foreign objects from affecting the charging or discharging of the battery cells. How to ensure the airtightness of the cabinet has always been a research direction in the industry.
  • the embodiment of the present application provides a battery and an electrical device.
  • the present application provides a battery, including: a casing, a battery cell, a cover and a seal, the casing has an opening; the battery cell is accommodated in the casing; the cover includes a main body for covering the opening part and the installation part connected with the main body part, the installation part protrudes into the housing through the opening; the seal includes an annular fixing part sleeved on the installation part, and a deformation part extending from the ring fixing part to a direction away from the installation part, The deformation part includes at least one protrusion extending from the ring-shaped fixing part to the direction away from the installation part.
  • the ring-shaped fixing part and the protrusion are sequentially arranged on the installation part and the housing along the radial direction of the opening. Between the protrusions, the protrusion is used to deform and press against the inner surface of the housing, so that the seal is clamped between the mounting part and the inner surface of the housing and seals the opening.
  • the size of the seal does not affect the cooperation between the cover and the housing in the axial direction of the opening. Avoid obvious seams between the cover and the shell after the cover and the shell are closed; at the same time, when the cover and the shell are closed, debris will be generated by friction between the cover and the shell, radial clamping
  • the seal held between the mounting part and the inner surface of the housing can prevent debris from falling onto the battery cell, avoiding debris from affecting the operation of the battery cell, and improving battery life;
  • the cover body Or the shell is provided with a groove to accommodate the seal, and the application sets the installation part, and then the seal is sleeved on the installation part, which can effectively avoid the technical problems that the seal is easy to fall off and the groove is easy to accumulate foreign matter during the covering process;
  • the housing includes a side wall forming an opening, and along the radial direction of the opening, the length of the protrusion is greater than the distance from the annular fixing portion to the side wall.
  • the protrusion includes a first surface bent and extended from the ring-shaped fixing part, and a second surface disposed on the side of the first surface away from the main part.
  • the protrusion When the cover and the housing are closed, the protrusion is away from One end of the ring-shaped fixing portion is bent and deformed, and the second surface abuts against the side wall.
  • the protrusion not only produces compression deformation along the radial direction of the opening, but also undergoes bending deformation, which increases the area where the protrusion contacts the inner surface; through bending deformation, part of the protrusion is accommodated between the mounting part and the inner surface, avoiding Due to the large size of the protrusion, the problem of deformation of the cover or housing is caused.
  • the protrusion extends from the ring-shaped fixing part toward the main body, and a stacking space is formed between the ring-shaped fixing part, the first surface and the side wall.
  • the protrusion is far away from One end of the ring-shaped fixing part is bent and deformed, and is accommodated in the stacking space.
  • the deformation portion includes a plurality of protrusions arranged at intervals along the axial direction of the opening.
  • the main body includes a limiting step that interferes with the side wall
  • the limiting step includes a first covering surface that fits with the end surface of the side wall, and a first covering surface bent and extended from the first covering surface. Two covering surfaces, the second covering surface is in contact with the inner surface of the opening formed by the side wall. The main body and the side wall are interferingly engaged by setting the limiting step, thereby further improving the sealing of the shell and the cover and the stability of the connection.
  • the installation part includes an installation surface opposite to the inner surface, and a connection surface connecting the installation surface and the second covering surface, and the ring-shaped fixing part includes a third surface and a fourth surface opposite to each other. Four surfaces are connected with the protrusion, and the third surface is in contact with the installation surface.
  • the installation part is formed by extending from the second covering surface of the installation step, so that the installation part and the side wall are oppositely arranged, and a gap for accommodating the seal can be left between the installation part and the side wall to ensure the stability of the connection between the seal and the installation part .
  • connection part is glued on the end surface of the installation part away from the main part.
  • the connection part and the installation part are connected by bonding, so that the processing is convenient.
  • the present application provides an electric device, the electric device includes the above-mentioned battery, and the battery is used to provide electric energy.
  • FIG. 1 is a schematic cross-sectional structure diagram of a battery in the prior art
  • FIG. 2 is an enlarged structural schematic diagram of part A of the battery in the prior art shown in FIG. 1;
  • Fig. 3 is a schematic structural diagram of a vehicle in some embodiments of the present application.
  • FIG. 4 is a schematic diagram of an exploded structure of a battery in some embodiments of the present application.
  • FIG. 5 is a schematic diagram of an exploded structure of a battery cell in some embodiments of the present application.
  • FIG. 6 is a schematic diagram of a three-dimensional structure of a battery in some embodiments of the present application.
  • Fig. 7 is a schematic cross-sectional structure diagram of the battery shown in Fig. 6 along the line B-B;
  • Fig. 8 is a schematic diagram showing an enlarged structure of part C of the battery shown in Fig. 7;
  • FIG. 9 is a schematic diagram of a disassembled structure of a battery in some embodiments of the present application.
  • Fig. 10 is a schematic diagram of an enlarged structure of part D of the battery shown in Fig. 9;
  • Fig. 11 is a schematic diagram of the principle of deformation of the sealing member of the battery according to some embodiments of the present application.
  • Sealing member 3 annular fixing part 31, third surface 311, fourth surface 312, deformation part 32, first surface 321, second surface 322, connecting part 33, protrusion 34, stacking space 35;
  • Cover body 4 main body part 41, first covering surface 411, second covering surface 412, installation part 42, connection surface 431, installation surface 432;
  • multiple refers to more than two (including two), similarly, “multiple groups” refers to more than two groups (including two), and “multiple pieces” refers to More than two pieces (including two pieces).
  • Power batteries are not only used in energy storage power systems such as hydraulic, thermal, wind and solar power plants, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric vehicles, as well as military equipment and aerospace and other fields . With the continuous expansion of power battery application fields, its market demand is also constantly expanding.
  • a battery needs to be provided with a box to place one or more battery cells 1b, usually a seal 1d is provided between the upper cover 1a and the lower cover 1c of the box, To isolate external water vapor and improve battery life.
  • a groove structure is usually provided on the upper cover 1a and/or the lower cover 1c to place the seal 1d.
  • the upper cover 1a and the lower cover 1c squeeze The sealing member 1d is pressed so that the sealing member 1d is deformed, and is pressed between the upper cover 1a and the lower cover 1c along the axial direction of the box to realize sealing of the box.
  • the size of the sealing part 1d is too large, it may cause an obvious seam between the upper cover 1a and the lower cover 1c; There is a gap between them, which affects the sealing of the box.
  • the upper cover 1a and the lower cover 1c may be scratched, and the debris generated by the scratches will fall on the battery cell 1b, which may affect the normal operation of the battery cell 1b and reduce the product quality. stability.
  • the cover includes a main body that covers the opening and a
  • the installation part is connected with the main body, and the installation part extends into the casing through the opening; and the sealing element is sleeved on the installation part and clamped between the installation part and the inner surface of the casing to seal the opening.
  • the seal is clamped between the mounting part and the inner surface of the housing along the radial direction of the opening, and the size of the seal does not affect the fit between the cover and the housing along the axial direction of the opening, preventing the cover and the housing from being closed.
  • the battery cells disclosed in the embodiments of the present application can be used, but not limited to, in electric devices such as vehicles, ships or aircrafts.
  • the power supply system comprising the battery unit and battery disclosed in this application can be used to form the electrical device, which is conducive to alleviating and automatically adjusting the deterioration of the expansion force of the battery cell, supplementing the consumption of the electrolyte, and improving the stability of battery performance and battery life. .
  • the embodiment of the present application provides an electric device using a battery as a power source.
  • the electric device can be, but not limited to, a mobile phone, a tablet, a notebook computer, an electric toy, an electric tool, a battery car, an electric car, a ship, a spacecraft, and the like.
  • electric toys can include fixed or mobile electric toys, such as game consoles, electric car toys, electric boat toys, electric airplane toys, etc.
  • spacecraft can include airplanes, rockets, space shuttles, spaceships, etc.
  • a vehicle 1000 as an electric device according to an embodiment of the present application is taken as an example for description.
  • FIG. 3 is a schematic structural diagram of a vehicle 1000 provided by some embodiments of the present application.
  • the vehicle 1000 can be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle can be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle.
  • the interior of the vehicle 1000 is provided with a battery 100 , and the battery 100 may be provided at the bottom, head or tail of the vehicle 1000 .
  • the battery 100 can be used for power supply of the vehicle 1000 , for example, the battery 100 can be used as an operating power source of the vehicle 1000 .
  • the vehicle 1000 may further include a controller 200 and a motor 300 , the controller 200 is used to control the battery 100 to supply power to the motor 300 , for example, for starting, navigating and running the vehicle 1000 .
  • the battery 100 can not only be used as an operating power source for the vehicle 1000 , but can also be used as a driving power source for the vehicle 1000 , replacing or partially replacing fuel oil or natural gas to provide driving power for the vehicle 1000 .
  • FIG. 4 is an exploded view of a battery 100 provided by some embodiments of the present application.
  • the battery 100 includes a case 1 , a battery cell 2 and a cover 4 .
  • the box body may include a cover 4 and a casing 1 , the cover 4 and the casing 1 cover each other, and the cover 4 and the casing 1 jointly define an accommodating space for accommodating the battery cells 2 .
  • the housing 1 can be a hollow structure with an open end, and the cover 4 can be a plate-shaped structure, and the cover 4 is covered on the opening side of the housing 1, so that the cover 4 and the housing 1 jointly define an accommodation space; 4 and the housing 1 can also be hollow structures with one side opening, and the opening side of the cover body 4 covers the opening side of the housing 1 .
  • the box body formed by the cover body 4 and the casing body 1 may be in various shapes, such as a cylinder, a cuboid, and the like.
  • the battery 100 there may be multiple battery cells 2 , and the multiple battery cells 2 may be connected in series, in parallel or in parallel.
  • the mixed connection means that the multiple battery cells 2 are connected in series and in parallel.
  • a plurality of battery cells 2 can be directly connected in series or in parallel or mixed together, and then the whole body composed of a plurality of battery cells 2 is accommodated in the box; of course, the battery 100 can also be a plurality of battery cells 2 connected in series first Or parallel or mixed connection to form a battery module form, and multiple battery modules are connected in series or parallel or mixed to form a whole, and accommodated in the box.
  • the battery 100 may also include other structures, for example, the battery 100 may also include a bus component for realizing electrical connection between multiple battery cells 2 .
  • each battery cell 2 may be a secondary battery or a primary battery; it may also be a lithium-sulfur battery, a sodium-ion battery or a magnesium-ion battery, but not limited thereto.
  • the battery cell 2 can be in the form of a cylinder, a flat body, a cuboid or other shapes.
  • FIG. 5 is a schematic diagram of an exploded structure of a battery cell 2 provided by some embodiments of the present application.
  • a battery cell 2 refers to the smallest unit that makes up a battery.
  • the battery cell 2 includes an end cover 21 , a casing 22 , a cell assembly 23 and other functional components.
  • the end cap 21 refers to a component that covers the opening of the casing 22 to isolate the internal environment of the battery cell 2 from the external environment.
  • the shape of the end cap 21 can be adapted to the shape of the housing 22 to fit the housing 22 .
  • the end cap 21 can be made of a material (such as aluminum alloy) with a certain hardness and strength, so that the end cap 21 is not easy to deform when being squeezed and collided, so that the battery cell 2 can have a higher Structural strength and safety performance can also be improved.
  • Functional components such as electrode terminals 21 a may be provided on the end cap 21 .
  • the electrode terminal 21 a can be used for electrical connection with the battery cell assembly 23 for outputting or inputting electric energy of the battery cell 2 .
  • the end cover 21 may also be provided with a pressure relief mechanism for releasing the internal pressure when the internal pressure or temperature of the battery cell 2 reaches a threshold value.
  • the material of the end cap 21 can also be various, for example, copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., which is not particularly limited in this embodiment of the present application.
  • an insulator can be provided inside the end cover 21 , and the insulator can be used to isolate the electrical connection components in the housing 22 from the end cover 21 to reduce the risk of short circuit.
  • the insulating member may be plastic, rubber or the like.
  • the shell 22 is a component used to cooperate with the end cap 21 to form the internal environment of the battery cell 2 , wherein the formed internal environment can be used to accommodate the cell assembly 23 , electrolyte and other components.
  • the shell 22 and the end cover 21 can be independent parts, and an opening can be provided on the shell 22 , and the internal environment of the battery cell 2 can be formed by making the end cover 21 cover the opening at the opening.
  • the end cover 21 and the shell 22 can also be integrated. Specifically, the end cover 21 and the shell 22 can form a common connection surface before other components are put into the shell, and when the inside of the shell 22 needs to be encapsulated, then Make the end cover 21 cover the shell 22 .
  • the housing 22 can be in various shapes and sizes, such as cuboid, cylinder, hexagonal prism and so on. Specifically, the shape of the casing 22 can be determined according to the specific shape and size of the cell assembly 23 .
  • the housing 22 can be made of various materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., which is not particularly limited in this embodiment of the present application.
  • the cell assembly 23 is a component in the battery cell 100 where the electrochemical reaction occurs.
  • One or more cell assemblies 23 may be contained in the housing 22 .
  • the cell assembly 23 is mainly formed by winding or stacking the positive electrode sheet and the negative electrode sheet, and usually a separator is provided between the positive electrode sheet and the negative electrode sheet.
  • the part of the positive electrode sheet and the negative electrode sheet with the active material constitutes the main body of the cell assembly, and the parts of the positive electrode sheet and the negative electrode sheet without the active material respectively constitute tabs.
  • the positive pole tab and the negative pole tab can be located at one end of the main body together or at both ends of the main body. During the charging and discharging process of the battery, the positive active material and the negative active material react with the electrolyte, and the tabs are connected to the electrode terminals to form a current loop.
  • FIG. 6 is a schematic three-dimensional structure diagram of a battery according to some embodiments of the present application
  • FIG. 7 is a schematic cross-sectional structure diagram of the battery shown in FIG. 6 along line B-B
  • FIG. 8 is a schematic diagram of an enlarged structure of part C of the battery shown in FIG. 7
  • FIG. 9 is a schematic diagram of a disassembled structure of a battery according to some embodiments of the present application.
  • the present application provides a battery, including: a casing 1, a battery cell 2, a cover 4 and a seal 3, the casing 1 has an opening 12; the battery cell 2 is accommodated in the casing 1; the cover 4 includes a The main body part 41 that covers the opening 12 and the installation part 42 connected with the main body part 41 , the installation part 42 extends into the housing 1 through the opening 12 ; the seal 3 is sleeved on the installation part 42 and clamped by the installation part 42 and the inner surface 111 of the housing 1 to seal the opening 12.
  • the housing 1 can be a structure with an opening 12 at one end, or a structure with openings 12 at opposite ends as shown in FIG. Inside.
  • the side wall 11 of the housing 1 surrounds and forms a storage space for placing the battery cell 2.
  • the side wall 11 of the housing 1 refers to the outer wall of the housing 1 in a direction parallel to the height direction (the Y direction in FIG. 6 ).
  • the wall 11 includes an inner surface 111 and an outer surface oppositely disposed, wherein the inner surface 111 is close to the battery cell 2 , and the outer surface is farther away from the battery cell 2 than the inner surface 111 .
  • the opposite ends of the housing 1 are provided with openings 12, correspondingly, two covers 4 are provided to cover the two openings 12 respectively, and two sealing members 3 are provided respectively. Connect with two covers 4.
  • Those skilled in the art can set the structure of the cover body 4 according to actual needs. For example: in the embodiment shown in FIG.
  • the cover 4 below the 1 is provided with a power connection structure 5 to facilitate charging and discharging of the battery cells 2 through the power connection structure 5.
  • the installation part 42 extends into the housing 1 through the opening 12, and the sealing member 3 is sleeved on the installation part 42 and clamped between the installation part 42 and the inner surface 111 of the housing 1 to seal the opening 12, that is, to seal
  • the part 3 is an elastically deformable part, and the deformed sealing part 3 can apply a deformation force to the mounting part 42 and the housing 1 along the radial direction of the opening 12 (direction X in FIG. 6 ), thereby sealing the opening 12 .
  • the seal 3 can be sleeved on the installation part 42 through elastic deformation force, and can also be provided with grooves, slots and other structures on the installation part 42 to fit the seal 3 on the installation part 42, and can also be bonded , welding, etc. to connect the sealing member 3 to the installation part 42 at that time, the application part limits the connection method between the sealing member 3 and the installation part 42 .
  • the battery cell 2 is usually made of metal such as aluminum or steel, and of course it can also be made of other non-metallic materials.
  • the cover 4 and the casing 1 are scratched, and debris may be generated between the cover 4 and the casing 1 .
  • the sealing member 3 sandwiched between the mounting portion 42 and the inner surface 111 of the casing 1 in the radial direction of the opening 12 can prevent the debris from falling into the battery cell 2 .
  • the seal 3 is clamped between the installation part 42 and the inner surface 111 of the housing 1 along the radial direction of the opening 12, and the size of the seal 3 does not affect the size of the cover along the axial direction of the opening 12.
  • the cooperation between the body 4 and the shell 1 prevents the obvious seam between the cover 4 and the shell 1 after the cover 4 and the shell 1 are closed; Rubbing between the body 4 and the housing 1 generates debris, and the seal 3 clamped between the mounting part 42 and the inner surface 111 of the housing 1 along the radial direction of the opening 12 can prevent debris from falling onto the battery cell 2 , to prevent debris from affecting the work of the battery cell 2, and improve battery life;
  • the cover 4 or the housing 1 is provided with a groove to accommodate the seal 3, and the present application provides a mounting part 42, and then the seal 3 is set on the installation part 42, which can effectively avoid the technical problems that the seal 3 is easy to fall off and the groove is easy to accumulate foreign matter during the covering process; since the groove is omitted on the casing 1, the battery provided by the application can be Thinning the wall thickness of the casing 1 reduces the production cost.
  • the seal 3 includes an annular fixing portion 31 sleeved on the mounting portion 42, and a deformation portion 32 extending from the annular fixing portion 31 in a direction away from the mounting portion 42.
  • the deformation portion 32 is used to deform and press against the housing 1, so that the sealing member 3 is clamped between the installation part 42 and the inner surface 111 of the housing 1 and seals the opening 12.
  • the deformable portion 32 is an elastically deformable portion of the sealing member 3 , and of course the annular fixing portion 31 may also have elastic deformability.
  • the shape of the deformation part 32 is various, specifically, it can be a wedge-shaped structure whose diameter increases successively along the direction from the shell 1 to the cover 4, so as to facilitate the cover 4 to fit on the shell 1;
  • the shape of a semicircle protruding, this embodiment does not limit the specific shape of the deformation part 32 .
  • the stable connection between the sealing part 3 and the mounting part 42 can be realized through the annular fixing part 31, and the sealing part 3 can be pressed against the inner surface 111 of the housing 1 mainly through the deformation of the deformation part 32.
  • the deformation part 32 includes at least one protrusion 34 extending from the annular fixing part 31 to the direction away from the installation part 42 , and when the cover body 4 and the housing 1 are closed, along the radial direction of the opening 12 , the ring shape The fixing portion 31 and the protrusion 34 are sequentially disposed between the mounting portion 42 and the housing 1 .
  • the axial direction of the opening 12 is the direction in which the battery cell 2 enters the housing 1.
  • the radial direction of the opening 12 is the direction from the center to the edge of the opening 12.
  • the diameter of the opening 12 is perpendicular to the axial direction of the opening 12.
  • the X direction shown in FIG. 6 is one of multiple radial directions.
  • the deformation part 32 is an annular protrusion 34 arranged around the annular fixing part 31 , the protrusion 34 and the annular fixing part 31 are arranged at an angle, and the gap between the protrusion 34 and the annular fixing part 31 is The space provided can accommodate debris generated by friction between the cover body 4 and the housing 1 .
  • the housing 1 includes a side wall 11 forming an opening 12 . Wall 11 distance.
  • Fig. 11 is a schematic diagram of the principle of deformation of the sealing member 3 of the battery according to some embodiments of the present application. From this figure 11, it can be seen that the length d1 is the radial length of the protrusion 34 along the opening 12, that is, when the protrusion 34 is not deformed, the plane where the protrusion 34 is connected to the annular fixing part is to the protrusion 34 The distance in the plane where the free end lies.
  • the length d2 is the distance from the annular fixing portion 31 to the side wall 11 after the cover body 4 and the casing 1 are closed.
  • the protrusion 34 includes a first surface 321 bent and extended from the annular fixing portion 31 , and a second surface 322 disposed on the side of the first surface 321 away from the main body 41 , When the cover 4 and the housing 1 are closed, the end of the protrusion 34 away from the ring-shaped fixing portion 31 is bent and deformed, and the second surface 322 abuts against the side wall 11 .
  • the first surface 321 and the second surface 322 may be relatively parallel or non-parallel.
  • the first surface 321 and the second surface 322 can gradually approach along the direction from the center to the edge of the opening 12, so that the end of the protrusion 34 connected to the ring-shaped fixing part 31 is thicker than the end contacting the inner surface 111, thereby facilitating the bending of the protrusion 34. fold deformation.
  • the protrusion 34 in this embodiment not only produces compression deformation along the radial direction of the opening 12, but also can undergo bending deformation, so that the area of the protrusion 34 in contact with the inner surface 111 increases and the airtightness is increased; at the same time, through the bending deformation Part of the protrusion 34 is accommodated between the mounting portion 42 and the inner surface 111 to avoid deformation of the cover 4 or the housing 1 due to the large size of the protrusion 34 .
  • the protrusion 34 extends from the ring-shaped fixing part 31 to the direction close to the main body part 41.
  • a stacking space 35 is formed between the ring-shaped fixing part 31, the first surface 321 and the side wall 11.
  • the protrusion 34 Since the cover 4 is closed toward the housing 1 , under the action of friction, the protrusion 34 will bend toward the main body 41 .
  • the protrusion 34 By setting the protrusion 34 extending from the annular fixing portion 31 toward the main body 41 , it is ensured that when the cover 4 and the housing 1 are closed, the protrusion 34 must be bent toward the main body 41 .
  • the debris generated by friction between the cover body 4 and the housing 1 can be accommodated in the stacking space 35. After the housing 1 and the cover body 4 are opened simultaneously, the debris can still be accommodated in the stacking space 35. Due to the looseness between the casing 1 and the cover 4 , it fell onto the battery cell 2 .
  • the deformation portion 32 includes a plurality of protrusions 34 arranged at intervals along the axial direction of the opening 12 .
  • the number of protrusions 34 is two, of course, more protrusions 34 may be provided as required to increase the sealing performance of the housing 1 and the cover 4 .
  • the structures and sizes of the plurality of protrusions 34 can be consistent or inconsistent,
  • the main body 41 includes a limiting step that interferes with the side wall 11 , the limiting step includes a first covering surface 411 that fits with the end surface of the side wall 11 , and a second covering surface 411 bent and extended from the first covering surface 411 .
  • the covering surface 412 , the second covering surface 412 is in contact with the inner surface 111 of the side wall 11 forming the opening 12 .
  • the main body portion 41 may be a plate-like structure, or may be another structure capable of covering the opening 12 .
  • the limiting step includes a first covering surface 411 and a second covering surface 412, both of which are planes.
  • the limiting step It is also possible to include more surfaces, making the limit step shape more complex.
  • the first covering surface 411 can also be a curved surface matched with the end surface of the side wall 11 to increase the airtightness of the casing 1 and the cover 4 .
  • the body part 41 and the side wall 11 are interferingly engaged by setting the limiting step, thereby further improving the sealing and connection stability of the housing 1 and the cover body 4 .
  • the mounting portion 42 includes a mounting surface 432 opposite to the inner surface 111 and a connecting surface 431 connecting the mounting surface 432 and the second covering surface 412, and the annular fixing portion 31 includes a third surface 311 and a fourth surface opposite to each other. 312 , the fourth surface 312 is connected to the protrusion 34 , and the third surface 311 is in contact with the mounting surface 432 .
  • connection surface 431 is also a planar structure.
  • connection surface 431 may also be a curved surface forming a groove structure, so that the connection between the installation part 42 and the ring-shaped fixing part 31 is stable.
  • the mounting part 42 is formed by extending from the second covering surface 412 of the mounting step, so that the mounting part 42 and the side wall 11 are oppositely arranged, and a gap for accommodating the seal 3 can be left between the mounting part 42 and the side wall 11 to ensure the seal 3 and the stability of the connection with the mounting part 42.
  • the seal 3 also includes a connecting portion 33 bent and extended from one end of the ring-shaped fixing portion 31 , the connecting portion 33 and the protrusion 34 are respectively arranged on opposite sides of the ring-shaped fixing portion 31 , and the ring-shaped fixing portion 31 and the connecting portion 33 form a The installation step matched with the installation part 42 , the connection part 33 is connected with the installation part 42 .
  • a groove can be provided on the mounting portion 42 so that the connecting portion 33 can be accommodated in the groove.
  • the connecting part 33 can be arranged on the end surface of the mounting part 42 away from the main part 41 by means of bonding.
  • the present application also provides an electric device, including the battery of any one of the above schemes, and the battery is used to provide electric energy for the electric device.
  • the electric device may be any of the aforementioned devices or systems using batteries.
  • the present application provides a prismatic shell battery, in which a single battery cell 2 is accommodated in the shell, with openings 12 at both ends of the shell, and two covers 4 in two. Each seal 3 closes the two openings 12 respectively.
  • the cover 4 includes a main body 41 for covering the opening 12 and a mounting portion 42 connected to the main body 41.
  • the mounting portion 42 extends into the housing 1 through the opening 12.
  • the mounting portion 42 is connected to the inner surface 111 of the housing 1.
  • the sealing member 3 is sleeved on the ring-shaped fixing part 31 on the installation part 42, and the deformation part 32 extending from the ring-shaped fixing part 31 to the direction away from the installation part 42.
  • the deformation part 32 includes two protrusions 34, two The first protrusion 34 is used to deform and press against the inner surface 111 of the housing 1 , so that the sealing member 3 is clamped between the installation portion 42 and the inner surface 111 of the housing 1 and seals the opening 12 .

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Battery Mounting, Suspending (AREA)
  • Sealing Battery Cases Or Jackets (AREA)

Abstract

La présente invention concerne une batterie et un dispositif électrique. La batterie comprend un compartiment, un élément de batterie, un couvercle et un élément d'étanchéité, le compartiment ayant une ouverture ; l'élément de batterie est logé dans le compartiment ; le couvercle comprend une partie de corps principal pour recouvrir l'ouverture et une partie de montage reliée à la partie de corps principal, et la partie de montage s'étend dans le compartiment en passant à travers l'ouverture ; l'élément d'étanchéité comprend une partie de fixation annulaire emmanchée sur la partie de montage, et une partie de déformation qui s'étend à partir de la partie de fixation annulaire à l'opposé de la partie de montage, et la partie de déformation comprend au moins une saillie qui s'étend à partir de la partie de fixation annulaire à l'opposé de la partie de montage. Lorsque le couvercle et le compartiment sont fermés, le long de la direction radiale de l'ouverture, la partie de fixation annulaire et les saillies sont disposées de manière séquentielle entre la partie de montage et le compartiment. Les saillies sont utilisées pour se déformer et s'appuyer contre la surface interne du compartiment, de telle sorte que l'élément d'étanchéité est serré entre la partie de montage et la surface interne du compartiment et scelle l'ouverture. La batterie fournie dans la présente invention peut éviter un joint évident entre le couvercle et le compartiment.
PCT/CN2022/098473 2021-09-28 2022-06-13 Batterie et dispositif électrique WO2023050888A1 (fr)

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CN202122368836.5 2021-09-28
CN202122368836.5U CN215955400U (zh) 2021-09-28 2021-09-28 电池和用电装置

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WO2024174838A1 (fr) * 2023-02-24 2024-08-29 南京泉峰科技有限公司 Batterie au sodium-ion, chargeur associé, dispositif de stockage d'énergie et outil électrique

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JP2019075329A (ja) * 2017-10-18 2019-05-16 三菱自動車工業株式会社 電装品ケースのシール構造
CN210403866U (zh) * 2018-11-14 2020-04-24 东莞煜森精密端子有限公司 动力电池
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* Cited by examiner, † Cited by third party
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CN117239336A (zh) * 2023-11-10 2023-12-15 宁德时代新能源科技股份有限公司 一种电池箱、电池箱的制造方法、电池和用电装置
CN117239336B (zh) * 2023-11-10 2024-03-29 宁德时代新能源科技股份有限公司 一种电池箱、电池箱的制造方法、电池和用电装置

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