WO2024114131A1 - Batterie et appareil électrique - Google Patents

Batterie et appareil électrique Download PDF

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Publication number
WO2024114131A1
WO2024114131A1 PCT/CN2023/124797 CN2023124797W WO2024114131A1 WO 2024114131 A1 WO2024114131 A1 WO 2024114131A1 CN 2023124797 W CN2023124797 W CN 2023124797W WO 2024114131 A1 WO2024114131 A1 WO 2024114131A1
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WO
WIPO (PCT)
Prior art keywords
battery
battery cell
along
extension portion
main body
Prior art date
Application number
PCT/CN2023/124797
Other languages
English (en)
Chinese (zh)
Inventor
余凯勤
张小淋
陈贵泽
赵佩杰
张晓�
Original Assignee
宁德时代新能源科技股份有限公司
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 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 WO2024114131A1 publication Critical patent/WO2024114131A1/fr

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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
    • H01M50/20—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
    • H01M50/204—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
    • H01M50/211—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for pouch 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
    • H01M50/242—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 against vibrations, collision impact or swelling
    • 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
    • H01M50/289—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by spacing elements or positioning means within frames, racks or packs
    • H01M50/291—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by spacing elements or positioning means within frames, racks or packs characterised by their shape
    • 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
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/572—Means for preventing undesired use or discharge
    • 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 relates to the field of battery technology, and in particular to a battery and an electrical device.
  • Batteries are widely used in electronic devices, such as electric vehicles, electric cars, electric airplanes, electric ships, etc.
  • the present application provides a battery and an electrical device, which can increase the life of the battery cells.
  • the present application provides a battery, comprising a battery cell group, the battery cell group comprising a plurality of battery cells arranged in a stacked manner; an insulating member connected to the battery cell group; and a box body for accommodating the battery cell group and the insulating member; wherein the insulating member comprises a main body and an extension portion, the main body portion being located on one side of the battery cell group in a first direction, the extension portion being located on one side of the battery cell group in a second direction, the second direction being perpendicular to the first direction, the extension portion being connected to the main body portion, and the extension portion being supported between the battery cell group and an inner wall of the box body.
  • the insulating member includes a main body and an extension part, the main body is located on one side of the battery cell group in the first direction, the extension part is located on one side of the battery cell group in the second direction, the second direction is perpendicular to the first direction, the extension part is connected to the main body, and the extension part is supported between the battery cell group and the inner wall of the box.
  • the extension part when the battery cell group is installed in the box, the extension part can pre-support the battery cell and separate the battery cell from the inner wall of the box, reducing the risk of friction between the surface of the battery cell and the inner wall of the box when the battery cell group is installed in the box along the first direction, resulting in damage to the surface of the battery cell, thereby increasing the life of the battery cell.
  • the plurality of battery cells are stacked along a third direction, and the third direction is perpendicular to the first direction and the second direction.
  • the extension portion has a first surface facing the battery cell group, and a positioning portion is provided on the first surface, and the positioning portion is configured as a groove structure facing the battery cell to accommodate at least a portion of the end of the battery cell close to the extension portion along the second direction.
  • the positioning portion is configured as a plurality of positioning portions, and the plurality of positioning portions correspond one-to-one to the ends of the plurality of battery cells close to the extension portion along the second direction.
  • the extension portion has a second surface facing away from the battery cell group, and the second surface has a first convex portion formed at a position corresponding to the positioning portion along the thickness direction, and a concave portion is formed between two adjacent first convex portions; when viewed along the second direction, the concave portion at least partially overlaps with the gap between two adjacent battery cells.
  • the part of the adhesive squeezed into the concave portion can be used to connect the two adjacent battery cells, so as to pre-fix the two adjacent battery cells, thereby reducing the risk of damage to the surface of the battery cells due to the shaking of the battery cells.
  • a second convex portion is formed on the first surface at a position corresponding to the concave portion along the thickness direction. Such a design enables the second convex portion to provide support force along the third direction to two adjacent battery cells, thereby reducing the risk of a large deviation of the battery cells and improving the stability of the battery cells.
  • a plurality of second protrusions are provided and spaced apart along the third direction, and the maximum sizes of two adjacent second protrusions along the third direction are different.
  • the cross-sectional shape of the extension along the first direction is wavy.
  • the extension having a wavy cross-sectional shape along the first direction has a concave portion facing the battery cell, which can be supported at the bottom of the battery cell, thereby improving the stability of the battery cell after the battery cell is assembled into the box, and the processing difficulty of the wavy extension is relatively low.
  • a buffer is provided between the extension and the battery cell assembly.
  • the extension part and the main body are integrally formed. Such a design shortens the production cycle of the insulating part and improves the force consistency of the insulating part.
  • the extension part is formed by bending from the main body.
  • the extension part can be formed by bending the part of the main body that exceeds the battery cell group toward the battery cell group, which reduces the difficulty of forming the extension part and is low in cost.
  • the battery cells are pouch battery cells.
  • the battery further comprises a busbar component, which is disposed on a surface of the main body facing away from the battery cell.
  • the main body is provided with an opening, and the tabs of the battery cell pass through the opening to connect with the busbar component.
  • the maximum dimension of the extension portion in the first direction is less than or equal to the maximum dimension of the battery cell along the first direction.
  • insulating members are provided on both sides of the battery cell group along the first direction.
  • the maximum dimension of the extension portion in the first direction is less than or equal to half of the maximum dimension of the battery cell along the first direction.
  • the present application provides an electrical device, which includes the battery in the above embodiment, and the battery is used to provide electrical energy.
  • FIG1 is a schematic structural diagram of a vehicle according to some embodiments of the present application.
  • FIG2 is a schematic diagram of the structure of a battery in some embodiments of the present application.
  • FIG3 is a schematic structural diagram of an insulating member in some embodiments of the present application.
  • FIG4 is a schematic structural diagram of an extension portion in some embodiments of the present application.
  • FIG5 is a schematic structural diagram of an extension portion of some other embodiments of the present application.
  • FIG. 6 is a schematic structural diagram of an extension portion of some further embodiments of the present application.
  • the reference numerals in the specific implementation manner are as follows: 100-Vehicle; 30-Controller; 20-Motor; 10-battery; 1-housing; 2-battery cell; 3-insulating member; 31-main body; 311-opening; 32-extension portion; 321-first surface; 322-second surface; 323-positioning portion; 324-first convex portion; 325-recess; 326-second convex portion; 4-collecting member; X-first direction; Y-second direction; Z-third direction.
  • multiple refers to more than two (including two).
  • multiple groups refers to more than two groups (including two groups), and “multiple pieces” refers to more than two pieces (including two pieces).
  • Batteries mentioned in this field can be divided into disposable batteries and rechargeable batteries according to whether they are rechargeable.
  • Common types of rechargeable batteries currently include: lead-acid batteries, nickel-metal hydride batteries and lithium-ion batteries.
  • Lithium-ion batteries are currently widely used in pure electric vehicles and hybrid vehicles. The capacity of lithium-ion batteries used for this purpose is relatively low, but they have larger output, charging current, and longer life, but the cost is higher.
  • the battery described in the embodiments of the present application refers to a rechargeable battery.
  • the embodiments disclosed in the present application will be described below mainly by taking a lithium-ion battery as an example. It should be understood that the embodiments disclosed in the present application are applicable to any other appropriate type of rechargeable battery.
  • the battery mentioned in the embodiments disclosed in the present application can be directly or indirectly applied to an appropriate electrical device to power the electrical device.
  • the battery mentioned in the embodiments disclosed in this application refers to a single physical module including one or more battery cells to provide a predetermined voltage and capacity.
  • Battery cells are the basic units in a battery, and can generally be divided into cylindrical battery cells, rectangular battery cells and soft-pack battery cells according to the packaging method. The following will mainly focus on soft-pack battery cells. It should be understood that the embodiments described below are also applicable to cylindrical battery cells or rectangular battery cells in some aspects.
  • Soft-pack battery is another name for polymer battery. Compared with lithium-ion battery, it has many advantages such as small size, light weight, high specific energy, high reliability and flexible design.
  • the application of batteries includes three levels: battery cells, battery modules and batteries.
  • the battery module is formed by electrically connecting a certain number of battery cells together and placing them in a frame in order to protect the battery cells from external impact, heat, vibration, etc.
  • the battery refers to the final state of the battery system installed in the electric vehicle.
  • the battery generally includes a box for encapsulating one or more battery cells.
  • the battery cell of a battery cell is composed of a positive electrode sheet, a negative electrode sheet and a separator.
  • the battery cell mainly relies on the movement of metal ions between the positive electrode sheet and the negative electrode sheet to work.
  • the positive electrode sheet includes a positive current collector and a positive active material layer.
  • the positive active material layer is coated on part of the surface of the positive current collector, and the positive current collector not coated with the positive active material layer serves as the positive electrode ear.
  • the material of the positive current collector can be aluminum, and the positive active material can be lithium cobalt oxide, lithium iron phosphate, ternary lithium or lithium manganese oxide, etc.
  • the negative electrode sheet includes a negative current collector and a negative active material layer.
  • the negative active material layer is coated on part of the surface of the negative current collector, and the negative current collector not coated with the negative active material layer serves as the negative electrode ear.
  • the material of the negative current collector can be copper, and the negative active material can be carbon or silicon, etc.
  • the positive electrode sheet, negative electrode sheet and separator of the soft-pack battery cell are alternately stacked together to form a multi-layer laminated battery cell, and the battery cell is packaged by an aluminum-plastic packaging film to form a battery cell.
  • the positive and negative ears of the soft-pack battery cell at least partially extend out of the aluminum-plastic packaging film. To extract the electrical energy from the battery cell.
  • the tabs of soft-pack battery cells have weak mechanical strength, they usually need to be supported by copper bars fixed on the wiring harness isolation plate when grouping. Generally, the tabs of the soft-pack battery cells are first passed through the wiring harness isolation plate and then welded on the copper bars. In some cases, in order to increase the connection strength between the soft-pack battery cells and the inner wall of the box, an adhesive is applied to the inner wall of the box along the direction in which the soft-pack battery cells are loaded into the box before the soft-pack battery cells are loaded into the box. After the soft-pack battery cells are loaded into the box, in addition to forming a connection with the wiring harness isolation plate, they can also form a connection with the inner wall of the box through an adhesive.
  • the battery system After the battery cell and the box are assembled, the battery system will prompt a battery failure after a period of use. There are many reasons for the above situation, such as electrolyte leakage, circuit leakage, etc., which shortens the life of the battery cell.
  • the above situation may be caused by excessive friction between the outer surface of the battery cell and the inner wall of the box during the assembly of the battery cell into groups.
  • the damage to the outer surface of the battery cell means that the insulation film of the battery cell is damaged, and the probability of insulation abnormality in the battery cell is significantly increased, and the life of the battery cell is naturally reduced.
  • the soft-pack battery is encapsulated with aluminum-plastic film, the mechanical strength is low, and the probability of damage after friction with the inner wall of the box is higher.
  • the battery includes a battery cell group, an insulating member and a box.
  • the battery cell group includes a plurality of battery cells arranged in a stacked manner.
  • the insulating member is connected to the battery cell group, and the box is used to accommodate the battery cell group and the insulating member.
  • the insulating member includes a main body and an extension portion, the extension portion is connected to the main body, and the extension portion is supported between the battery cell group and the inner wall of the box.
  • Electrical devices include, but are not limited to, battery vehicles, electric vehicles, ships, spacecraft, etc.
  • spacecraft include airplanes, rockets, space shuttles, and spacecraft, etc.
  • FIG. 1 is a schematic diagram of the structure of a vehicle 100 in some embodiments of the present application.
  • the vehicle 100 may be a fuel vehicle, a gas vehicle or a new energy vehicle.
  • the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc.
  • a motor 20, a controller 30 and a battery 10 may be provided inside the vehicle 100.
  • the controller 30 is used to control the battery 10 to power the motor 20.
  • a battery 10 may be provided at the bottom, front or rear of the vehicle 100.
  • the battery 10 may be used to power the vehicle 100.
  • the battery 10 may be used as an operating power source for the vehicle 100, for the circuit system of the vehicle 100, for example, for the working power demand during the start, navigation and operation of the vehicle 100.
  • the battery 10 may not only be used as an operating power source for the vehicle 100, but also as a driving power source for the vehicle 100, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 100.
  • the battery 10 may include a plurality of battery cells 2, wherein the plurality of battery cells 2 may be connected in series, in parallel, or in a hybrid connection, wherein the hybrid connection refers to a mixture of series and parallel connections.
  • the battery 10 may also be referred to as a battery pack.
  • a plurality of battery cells 2 may be connected in series, in parallel, or in a hybrid connection to form a battery module, and a plurality of battery modules may be connected in series, in parallel, or in a hybrid connection to form a battery 10.
  • a plurality of battery cells 2 may directly form a battery 10, or may first form a battery module, and then the battery module may form a battery 10.
  • FIG. 2 is a schematic diagram of the structure of a battery 10 in some embodiments of the present application.
  • the battery 10 may include a plurality of battery cells 2.
  • the battery 10 may also include a case 1, the interior of the case 1 is a hollow structure, and a plurality of battery cells 2 are accommodated in the case 1.
  • the case 1 may include a frame, and an assembly port is provided on at least one side of the frame along the first direction X for the battery cells 2 to be loaded into the case 1.
  • the shape of the frame may be determined according to the shape of the combination of the plurality of battery cells 2.
  • the case 1 may also include a side panel corresponding to the assembly port, and the side panel is used to close the above-mentioned assembly port so that the case 1 forms a closed accommodation space, and the accommodation space is used to accommodate the battery cells 2.
  • Multiple battery cells 2 are connected in parallel, in series or in a mixed combination and placed in the box 1.
  • multiple battery cells 2 can be pushed into the box 1 from the assembly opening along the first direction X after being grouped, and then the assembly opening is closed by the side plate to complete the assembly of the battery 10.
  • the battery 10 may also include other structures, which will not be described in detail here.
  • a wiring harness isolation plate is generally provided inside the box 1
  • a confluence component 4 is generally provided on the wiring harness isolation plate.
  • the present application provides a battery 10, the battery 10 includes 2 groups of battery cells, the battery cells 2 groups include a plurality of battery cells 2 stacked, an insulating member 3 connected to the battery cells 2 groups, a box 1 for accommodating the battery cells 2 groups and the insulating member 3, wherein the insulating member 3 includes a main body 31 and an extension 32, the main body 31 is located at the battery
  • the battery cell group 2 is on one side in the first direction X
  • the extension portion 32 is located on one side of the battery cell group 2 in the second direction Y.
  • the second direction Y is perpendicular to the first direction X.
  • the extension portion 32 is connected to the main body 31, and the extension portion 32 is supported between the battery cell group 2 and the inner wall of the box body 1.
  • the insulating member 3 may be a wire harness isolating plate, etc.
  • the insulating member 3 is a wire harness isolating plate, and the tabs of the battery cells 2 pass through the wire harness isolating plate and are welded to the copper bar on the wire harness isolating plate to achieve connection between the battery cells 2 and the wire harness isolating plate.
  • the first direction X is the length direction of the battery cell 2
  • the second direction Y is the width direction of the battery cell 2.
  • the battery cell 2 group enters the box body 1 along the first direction X.
  • An insulating member 3 may be provided on one side or both sides of the battery cell group 2 in the first direction X.
  • the dimension of the extension portion 32 in the first direction X may be smaller than or equal to the dimension of the battery cell 2 in the first direction X.
  • the extension portion 32 may be a flat plate, a side bent from the end plate of the main body 31 toward the battery cell 2 group, a corrugated plate, etc.
  • the extension portion 32 and the main body portion 31 may be integrally injection molded, the extension portion 32 may also be formed by bending from one end of the main body portion 31 , and the extension portion 32 may also be connected to the main body portion 31 via a fastener.
  • the insulating member 3 may be made of rubber, plastic, etc.
  • the insulating member 3 includes a main body 31 and an extension 32.
  • the main body 31 is located on one side of the battery cell 2 group in the first direction X
  • the extension 32 is located on one side of the battery cell 2 group in the second direction Y.
  • the second direction Y is perpendicular to the first direction X.
  • the extension 32 is connected to the main body 31, and the extension 32 is supported between the battery cell 2 group and the inner wall of the box 1.
  • the extension 32 can pre-support the battery cell 2 and separate the battery cell 2 from the inner wall of the box 1, which reduces the risk of damage to the surface of the battery cell 2 caused by friction between the surface of the battery cell 2 and the inner wall of the box 1 when the battery cell 2 group is installed in the box 1 along the first direction X, thereby improving the life of the battery cell 2.
  • a plurality of battery cells 2 are stacked along a third direction Z, and the third direction Z is perpendicular to the first direction X and the second direction Y.
  • the third direction Z is the stacking direction of the battery cells 2 in the battery cell 2 group.
  • the extension portion 32 has a first surface 321 facing the battery cell 2 group, and the first surface 321 is provided with a positioning portion 323, which is configured as a groove structure facing the battery cell 2 to accommodate at least a portion of the end of the battery cell 2 along the second direction Y close to the extension portion 32.
  • the cross-sectional shape of the positioning portion 323 along the second direction Y may be U-shaped, V-shaped, arc-shaped, etc.
  • the dimension of the positioning portion 323 of the groove structure in the third direction Z may be greater than or equal to the dimension of the battery cell 2 in the third direction Z.
  • the positioning portion 323 may be one or more. For example, there is one positioning portion 323 , and the size of the positioning portion 323 along the third direction Z is greater than the sum of the sizes of all battery cells 2 along the third direction Z.
  • the number of positioning portions 323 may be greater than the number of battery cell 2 groups.
  • the positioning portion 323 can be used for guidance and pre-positioning, which can improve the assembly efficiency of the battery 10 to a certain extent.
  • Such a design allows the end portion of the battery cell 2 to be supported by the positioning portion 323 of the groove structure.
  • the positioning portion 323 is configured in plurality, and the plurality of positioning portions 323 correspond one-to-one to the ends of the plurality of battery cells 2 along the second direction Y close to the extension portion 32 .
  • the distances between adjacent positioning portions 323 in the third direction Z may be the same or different.
  • Such a design enables the end of each battery cell 2 to be supported by the positioning portion 323 of the groove structure, and reduces the risk of surface damage of the battery cell 2 due to friction between adjacent battery cells 2 when the battery cells 2 are assembled into the box body 1 .
  • the extension portion 32 has a second surface 322 that is away from the battery cell 2 group, and the second surface 322 has a first protrusion 324 formed at a position corresponding to the positioning portion 323 along the thickness direction, and a recess 325 is formed between two adjacent first protrusions 324; when viewed along the second direction Y, the recess 325 at least partially overlaps with the gap between two adjacent battery cells 2.
  • the cross-sectional shape of the first protrusion 324 along the second direction Y can be rectangular, semicircular, triangular, etc.
  • the cross-sectional shape of the recess 325 along the second direction Y may be U-shaped, arc-shaped, V-shaped, etc.
  • the first protrusion 324 will push part of the adhesive to move, so that part of the adhesive flows to the area where the concave portion 325 is located along the first direction.
  • the adhesive can extend into the gap between two adjacent battery cells 2 .
  • the first protrusion 324 can squeeze part of the adhesive pre-coated on the inner wall of the box body 1 into the recess 325. Since the recess 325 at least partially overlaps with the gap between two adjacent battery cells 2, the part of the adhesive squeezed into the recess 325 can be used to connect the two adjacent battery cells 2, so as to pre-fix the two adjacent battery cells 2 and reduce the risk of surface damage of the battery cell 2 due to shaking of the battery cell 2.
  • a second convex portion 326 is formed on the first surface 321 at a position corresponding to the concave portion 325 along the thickness direction.
  • the thickness direction is the second direction Y.
  • the cross-sectional shape of the second protrusion 326 along the second direction Y can be rectangular, triangular, semicircular, semi-circular, etc.
  • Such a design enables the second protrusion 326 to provide a supporting force along the third direction Z to two adjacent battery cells 2 , thereby reducing the risk of a significant deflection of the battery cells 2 and improving the stability of the battery cells 2 .
  • a plurality of second protrusions 326 are configured and spaced apart along the third direction Z, and maximum dimensions of two adjacent second protrusions 326 along the third direction Z are different.
  • adjacent second protrusions 326 have different maximum sizes and can be visually distinguished, and between adjacent second protrusions 326 is a positioning portion 323 for supporting the battery cell 2. This can reduce visual interference when the battery cell 2 is installed into the positioning portion 323, effectively preventing confusion.
  • Such a design makes the positioning portion 323 easier to identify, effectively preventing mistakes when the battery cell 2 is installed into the positioning portion 323 , and improving the assembly efficiency of the battery 10 .
  • the cross-sectional shape of the extension portion 32 along the first direction X is a wave shape.
  • the cross-sectional shape of the extension portion 32 along the first direction X is wavy, which means that the extension portion 32 itself has a concave portion facing the battery cell 2 , and the concave portion can be used to support the end of the battery cell 2 .
  • the extension portion 32 having a wavy cross-sectional shape along the first direction X has a recessed portion facing the battery cell 2, which can be supported on the bottom of the battery cell 2 to improve the stability of the battery cell 2 after the battery cell 2 is assembled into the box body 1. At the same time, the wavy extension portion 32 is less difficult to process.
  • a buffer is provided between the extension portion 32 and the battery cell group 2 .
  • the specific material of the buffer is not limited, and it needs to have a certain ability to generate deformation and be able to restore at least part of the deformation when the external force is removed.
  • it can be foam or rubber.
  • the shape of the buffer is not limited, and it can be in the form of a plate, a block, or other shapes.
  • the cross-sectional shape of the extension portion 32 along the first direction X is wavy
  • the cross-sectional shape of the buffer along the first direction X is wavy
  • the buffer fits the first surface 321 .
  • the buffer can reduce the risk of the battery cell 2 being damaged due to the friction between the battery cell 2 and the box body 1 , thereby increasing the life of the battery cell 2 .
  • the extension portion 32 and the main body portion 31 are integrally formed.
  • the extension portion 32 and the main body portion 31 may be integrally formed by a process such as injection molding.
  • the extension portion 32 and the main body portion 31 are integrally formed. Compared with a method in which the extension portion 32 and the main body portion 31 are separately formed and then connected together by fasteners or bonding, since there is no gap between the extension portion 32 and the main body portion 31, the overall force consistency of the insulating member 3 is better.
  • Such a design shortens the production cycle of the insulating member 3 and improves the force consistency of the insulating member 3 .
  • the extension portion 32 is formed by bending from the main body portion 31. With this design, after the insulating member 3 is processed, the extension portion 32 can be formed by simply bending the portion of the main body portion 31 that exceeds the battery cell 2 group toward the battery cell 2 group, which reduces the difficulty of forming the extension portion 32 and is low in cost.
  • the battery cell 2 is a soft-pack battery cell 2 .
  • the battery 10 also includes a busbar component 4, which is arranged on a side surface of the main body 31 away from the battery cell 2, and an opening 311 is provided on the main body 31.
  • the pole ear of the battery cell 2 passes through the opening 311 to be connected to the busbar component 4.
  • One or more openings 311 may be provided on the main body 31 .
  • each battery cell 2 corresponds to two openings 311
  • the two openings 311 correspond to two tabs of the battery cell 2 , respectively.
  • the tabs pass through the openings 311 , are bent through the main body 31 , and are welded to the current collector 4 .
  • the collecting component 4 may be a copper bar disposed on the main body 31 .
  • the maximum dimension of the extension portion 32 in the first direction X is less than or equal to the maximum dimension of the battery cell 2 along the first direction X.
  • the maximum dimension of the extension portion 32 in the first direction X is less than or equal to the maximum dimension of the battery cell 2 along the first direction X, which means that the extension portion 32 is at least located at the end of the battery cell 2 along the first direction X.
  • the main body 31 and the extension portion 32 half wrap a corner of the battery cell 2 .
  • the end of the battery cell 2 is more likely to rub against the inner wall of the box 1 .
  • This design allows the extension portion 32 to at least cover the end of the battery cell 2 , reducing the risk of damage to the surface of the battery cell 2 .
  • insulating members 3 are disposed on both sides of the battery cell group 2 along the first direction X.
  • the structures of the insulating members 3 on both sides of the battery cell group 2 along the first direction X may be the same or different.
  • the insulating members 3 on both sides of the battery cell 2 group along the first direction X have different structures, wherein the first surface 321 of the extension portion 32 of one insulating member 3 is provided with the above-mentioned positioning portion 323, and the extension portion 32 of the other insulating member 3 is a flat plate structure, one end of the battery cell 2 is located in the positioning portion 323, and the other end of the battery cell 2 is abutted against the upper surface of the flat plate structure.
  • Such a design makes the structures of the battery cells 2 on both sides along the first direction X substantially the same. After the battery cells 2 are assembled into the box body 1 , the possibility of the battery cells 2 being deflected in the first direction X is reduced, thereby improving the reliability of the battery cells 2 .
  • the maximum dimension of the extension portion 32 in the first direction X is less than or equal to half of the maximum dimension of the battery cell 2 along the first direction X.
  • the extension portion 32 reduces the risk of damage to the end surface of the battery cell 2 while controlling the length of the extension portion 32 within a reasonable range, thereby reducing costs.
  • the present application further provides an electrical device, comprising the battery 10 described in any of the above schemes, and the battery 10 is used to provide electrical energy.
  • the present application provides a battery 10 , and the battery 10 includes 2 groups of battery cells, a box body 1 and an insulating member 3 .
  • the battery cell group 2 includes a plurality of battery cells 2 which are stacked, the battery cells 2 are soft-pack battery cells 2, and the plurality of battery cells 2 are stacked along a third direction Z, which is perpendicular to the first direction X and the second direction Y.
  • the insulating member 3 is connected to the battery cell group 2.
  • the box 1 is used to accommodate the battery cell group 2 and the insulating member 3.
  • the insulating member 3 includes a main body 31 and an extension portion 32, the main body 31 is located on one side of the battery cell group 2 in the first direction X, and the extension portion 32 is located on one side of the battery cell group 2 in the second direction Y, the second direction Y is perpendicular to the first direction X, the extension portion 32 is connected to the main body 31, and the extension portion 32 is supported between the battery cell group 2 and the inner wall of the box body 1.
  • the extension portion 32 has a first surface 321 facing the battery cell 2 group, and a positioning portion 323 is provided on the first surface 321.
  • the positioning portion 323 is configured as a groove structure facing the battery cell 2 to accommodate at least part of the end of the battery cell 2 close to the extension portion 32 along the second direction Y.
  • the extension portion 32 has a second surface 322 facing away from the battery cell 2 group, and the second surface 322 is formed with a first convex portion 324 at a position corresponding to the positioning portion 323 along the thickness direction, and a concave portion 325 is formed between two adjacent first convex portions 324; when viewed along the second direction Y, the concave portion 325 at least partially overlaps with the gap between two adjacent battery cells 2.
  • the first surface 321 is formed with a second convex portion 326 at a position corresponding to the concave portion 325 along the thickness direction.
  • the battery cell 2 Before the battery cell group 2 is put into the box along the first direction X, the battery cell 2 is first placed in the positioning portion 323 for pre-installation, and then all the battery cells 2 are connected to the insulating member 3 to form the battery cell group 2. Afterwards, the battery cell group 2 is pushed into the box body 1 along the first direction X to complete the assembly of the battery cell 2 and the box body 1.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Battery Mounting, Suspending (AREA)

Abstract

La présente demande se rapporte au domaine technique des batteries, et divulgue une batterie et un appareil électrique. La batterie comprend : un bloc d'éléments de batterie, le bloc d'éléments de batterie comprenant de multiples éléments de batterie empilés ; un organe isolant, connecté au bloc d'éléments de batterie ; un corps de boîtier, utilisé pour recevoir le bloc d'éléments de batterie et l'organe isolant, l'organe isolant comprenant une partie de corps principal et une partie d'extension, la partie de corps principal étant située sur un côté du bloc d'éléments de batterie dans une première direction, la partie d'extension étant située sur un côté du bloc d'éléments de batterie dans une seconde direction, la seconde direction étant perpendiculaire à la première direction, la partie d'extension étant reliée à la partie de corps principal, et la partie d'extension étant supportée entre le bloc d'éléments de batterie et une paroi interne du corps de boîtier. Lorsque le bloc d'éléments de batterie est assemblé dans le corps de boîtier, la partie d'extension peut fournir un support d'avance pour les éléments de batterie et séparer les éléments de batterie vis-à-vis de la paroi interne du corps de boîtier, diminuant le risque d'endommagement de surfaces des éléments de batterie provoqué par un frottement généré entre les surfaces des éléments de batterie et la paroi interne du corps de boîtier lorsque le bloc d'éléments de batterie est assemblé dans le corps de boîtier dans la première direction, ce qui permet d'améliorer la durée de vie des éléments de batterie.
PCT/CN2023/124797 2022-11-29 2023-10-16 Batterie et appareil électrique WO2024114131A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202223180809.6U CN219017845U (zh) 2022-11-29 2022-11-29 电池及用电装置
CN202223180809.6 2022-11-29

Publications (1)

Publication Number Publication Date
WO2024114131A1 true WO2024114131A1 (fr) 2024-06-06

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WO (1) WO2024114131A1 (fr)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN219017845U (zh) * 2022-11-29 2023-05-12 宁德时代新能源科技股份有限公司 电池及用电装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20180071800A (ko) * 2016-12-20 2018-06-28 주식회사 엘지화학 에너지 밀도 향상 및 조립 공정이 간소화된 배터리 모듈
CN110770946A (zh) * 2018-03-30 2020-02-07 株式会社Lg化学 易于组装的包括汇流条框架的电池模块
CN114709547A (zh) * 2022-01-27 2022-07-05 浙江锋锂新能源科技有限公司 一种锂金属负极固态电池模组
CN219017845U (zh) * 2022-11-29 2023-05-12 宁德时代新能源科技股份有限公司 电池及用电装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20180071800A (ko) * 2016-12-20 2018-06-28 주식회사 엘지화학 에너지 밀도 향상 및 조립 공정이 간소화된 배터리 모듈
CN110770946A (zh) * 2018-03-30 2020-02-07 株式会社Lg化学 易于组装的包括汇流条框架的电池模块
CN114709547A (zh) * 2022-01-27 2022-07-05 浙江锋锂新能源科技有限公司 一种锂金属负极固态电池模组
CN219017845U (zh) * 2022-11-29 2023-05-12 宁德时代新能源科技股份有限公司 电池及用电装置

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