WO2021233060A1 - 电池、电池包及汽车 - Google Patents

电池、电池包及汽车 Download PDF

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Publication number
WO2021233060A1
WO2021233060A1 PCT/CN2021/089032 CN2021089032W WO2021233060A1 WO 2021233060 A1 WO2021233060 A1 WO 2021233060A1 CN 2021089032 W CN2021089032 W CN 2021089032W WO 2021233060 A1 WO2021233060 A1 WO 2021233060A1
Authority
WO
WIPO (PCT)
Prior art keywords
pole core
insulating spacer
housing
electrode
battery
Prior art date
Application number
PCT/CN2021/089032
Other languages
English (en)
French (fr)
Inventor
胡世超
蒋一苗
张明明
Original Assignee
比亚迪股份有限公司
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 比亚迪股份有限公司 filed Critical 比亚迪股份有限公司
Priority to EP21809626.1A priority Critical patent/EP4145618A4/en
Priority to KR1020227043902A priority patent/KR20230011370A/ko
Priority to CA3178515A priority patent/CA3178515A1/en
Priority to JP2022570577A priority patent/JP2023525919A/ja
Publication of WO2021233060A1 publication Critical patent/WO2021233060A1/zh
Priority to US17/988,161 priority patent/US20230074598A1/en

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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
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
    • H01M50/471—Spacing elements inside cells other than separators, membranes or diaphragms; Manufacturing processes thereof
    • H01M50/477—Spacing elements inside cells other than separators, membranes or diaphragms; Manufacturing processes thereof 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
    • H01M50/584—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries
    • H01M50/59—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries characterised by the protection means
    • H01M50/593—Spacers; Insulating plates
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/04—Construction or manufacture in general
    • H01M10/049—Processes for forming or storing electrodes in the battery container
    • 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
    • H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical 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
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
    • H01M50/103—Primary casings; Jackets or wrappings characterised by their shape or physical structure prismatic or rectangular
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
    • H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
    • H01M50/209—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for prismatic or rectangular cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/233—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
    • H01M50/244—Secondary casings; Racks; Suspension devices; Carrying devices; Holders characterised by their mounting method
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/249—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
    • 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
    • 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
    • H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
    • H01M50/471—Spacing elements inside cells other than separators, membranes or diaphragms; Manufacturing processes thereof
    • H01M50/474—Spacing elements inside cells other than separators, membranes or diaphragms; Manufacturing processes thereof characterised by their position inside the 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
    • H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
    • H01M50/489—Separators, membranes, diaphragms or spacing elements inside the cells, characterised by their physical properties, e.g. swelling degree, hydrophilicity or shut down properties
    • H01M50/497—Ionic conductivity
    • 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
    • H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
    • H01M50/509—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing characterised by the type of connection, e.g. mixed connections
    • H01M50/51—Connection only in series
    • 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
    • H01M50/584—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries
    • H01M50/586—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries inside the batteries, e.g. incorrect connections of electrodes
    • 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
    • H01M50/584—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries
    • H01M50/59—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries characterised by the protection means
    • H01M50/595—Tapes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2220/00—Batteries for particular applications
    • H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
    • 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

  • This application relates to the field of batteries, in particular to a battery, a battery pack and an automobile.
  • This application aims to solve at least one of the technical problems existing in the prior art. For this reason, the present application proposes a battery, the reliability of the connection between the electrode core groups of the battery is higher.
  • a battery includes a shell and a plurality of pole core groups encapsulated in the shell, two adjacent pole core sets are connected in series, the pole core set includes an encapsulating film and at least one pole core, the The pole core is located in the accommodating cavity enclosed by the packaging film; the pole core set includes a first electrode and a second electrode for drawing current, and the first electrode and the second electrode extend out of the packaging film, The first electrode of one of the two adjacent pole core groups is electrically connected to the second electrode of the other one, and the gap between the two adjacent pole core sets is filled with insulating material, so that the An insulating spacer is formed therebetween, and the connection part of two adjacent pole core groups is located in the insulating spacer.
  • insulating spacers are provided between two adjacent pole core groups, and the connection part of the two pole core groups is arranged in the insulating spacer, so that the insulating spacers can better connect the pole cores.
  • the group is fixed to prevent the movement between the electrode core groups, maintain the reliable connection between the electrode core groups, and can also enhance the strength of the connection part, thereby preventing the battery between two adjacent electrode core groups during the use of the battery. Distortion, breakage, etc. occur in the connecting part, which improves the stability of the connection between the pole core groups.
  • a battery pack includes the above-mentioned battery.
  • An automobile includes the above-mentioned battery pack.
  • FIG. 1 is a schematic structural diagram of a battery provided by an embodiment of the application.
  • FIG. 2 is a schematic structural diagram of a battery provided by the first embodiment of the application after the casing is removed.
  • FIG. 3 is a schematic structural diagram of a pole core set provided by an embodiment of the application.
  • Fig. 4 is a schematic cross-sectional view of Fig. 3 at IV-IV.
  • Fig. 5 is a schematic cross-sectional view of Fig. 1 at V-V in the first embodiment of the application.
  • Fig. 6 is a schematic cross-sectional view of Fig. 5 in another embodiment.
  • Fig. 7 is a schematic cross-sectional view of Fig. 5 in another embodiment.
  • Fig. 8 is a schematic cross-sectional view of Fig. 1 at VIII-VIII in the second embodiment of the application.
  • Fig. 9 is a schematic cross-sectional view of Fig. 8 in the third embodiment.
  • FIG. 10 is a schematic diagram of the disassembly of the battery according to the third embodiment of the application after the casing is removed.
  • FIG. 11 is a schematic diagram of the structure of a battery pack in an embodiment of the application.
  • Fig. 12 is a schematic diagram of a car in an embodiment of the application.
  • first and second are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, the features defined with “first” and “second” may explicitly or implicitly include one or more of these features. Further, in the description of the present application, unless otherwise specified, “plurality” means two or more.
  • the present application provides a battery 100, including a casing 10 and a plurality of pole core groups 20 encapsulated in the casing 10, two adjacent pole core groups 20 are connected in series, and the pole core group 20 includes an encapsulating film 201 and at least one pole
  • the core 202, the pole core 202 is located in the accommodating cavity enclosed by the packaging film 201;
  • the pole core set 20 includes a first electrode 21 and a second electrode 22 for drawing current, the first electrode 21 and the second electrode 22 extend out of the packaging film
  • the first electrode 21 of one of the two adjacent pole core sets 20 is electrically connected to the second electrode 22 of the other, and the gap between the two adjacent pole core sets 20 is filled with insulating material to
  • An insulating spacer 30 is formed between two adjacent pole core groups 20, and the connection part of the two adjacent pole core groups 20 is located in the insulating spacer 30.
  • an insulating spacer 30 is provided between two adjacent pole core sets 20, and the connection part of the two pole core sets 20 is arranged in the insulating spacer 30, so that the insulating spacer 30 can be used for more
  • the pole core groups 20 are well fixed to prevent the movement between the pole core sets 20, maintain the reliable connection between the pole core sets 20, and can also increase the strength of the connection part, thereby preventing the battery 100 from being used during the use of the battery 100.
  • the connection between two adjacent pole core groups 20 is twisted, broken, etc., which improves the stability of the connection between the pole core groups 20.
  • the battery 100 includes a casing 10 and a plurality of pole core groups 20 encapsulated in the casing 10, and two adjacent pole core groups 20 are connected in series.
  • the pole core group 20 includes an encapsulation film 201 and at least one pole core 202, and the pole core 202 is located in a receiving cavity enclosed by the encapsulation film 201.
  • the packaging film 201 is an aluminum-plastic composite film or a polymer composite film.
  • the pole core group 20 includes a first electrode 21 and a second electrode 22 for drawing current.
  • One of the first electrode 21 and the second electrode 22 is a positive electrode, the other is a negative electrode, the first electrode 21 and the second electrode 22 are The electrode 22 extends out of the packaging film 201, the first electrode 21 of one of the two adjacent pole core sets 20 is electrically connected to the second electrode 22 of the other, and the gap between the two adjacent pole core sets 20 is filled There is an insulating material to form an insulating spacer 30 between two adjacent pole core sets 20, and the connection part of the two adjacent pole core sets 20 is located in the insulating spacer 30.
  • the length of the battery 100 extends along the first direction L
  • the thickness of the pole core assembly 20 extends along the second direction W, wherein the second direction W and the first direction L are perpendicular to each other.
  • the length of the pole core set 20 extends along the first direction L
  • the plurality of pole core sets 20 are arranged along the first direction L; in addition, the first electrode 21 and the second electrode 22 of the pole core set 20 are arranged in the pole core set 20 along the first direction L
  • the opposite ends of a direction L, and the two pole core groups 20 connected in series are two adjacent pole core sets 20, that is, in the embodiment of the present application, two adjacent pole core sets 20 are connected in series.
  • the multiple pole core groups 20 adopt a "head-to-head” arrangement, which can conveniently realize the pair of pole core groups 20 in series, and the connection structure is simple.
  • this arrangement makes it easier to manufacture the battery 100 with a longer length. Therefore, when the battery 100 is installed in the casing of the battery pack 200, it is not necessary to provide support structures such as beams and longitudinal beams, but to use the battery 100.
  • the battery 100 is directly mounted on the outer shell of the battery pack 200 with its own casing 10 as a support, thereby saving the internal space of the battery pack 200, increasing the volume utilization rate of the battery pack 200, and increasing the energy density of the battery pack 200, which is beneficial to Reduce the weight of the battery pack 200.
  • a plurality of pole core groups 20 may form two pole core strings, that is, the battery 100 may contain two pole core strings, and the two pole core strings may be in a series relationship, for example, two pole cores.
  • the connection mode of the strings can be a "U" connection, that is, the corresponding electrodes of the two pole core strings located at the same end of the first direction L are connected in series, and the corresponding electrodes of the two pole core strings located at the other end of the first direction L are respectively The positive and negative poles of the battery.
  • Each pole core string has a plurality of pole core groups 20, two pole core strings are arranged along the second direction W, and the plurality of pole core groups 20 in each pole core string are arranged along the first direction L.
  • the first electrode 21 and the second electrode 22 of the pole core set 20 are arranged at opposite ends of the pole core set 20 along the first direction L, and the two pole core sets 20 connected in series are two adjacent pole cores. Group 20. That is, in the embodiment of the present application, for the multiple pole core sets 20 in each pole core string, two adjacent pole core sets 20 are connected in series. Therefore, the multiple pole core sets 20 of each pole core string adopt the "head The arrangement method of "opposite head", this arrangement method can more conveniently realize the two-by-two series connection between the pole core groups 20, and the connection structure is simple.
  • the battery 100 can also only be provided with one pole core string, that is, all pole core groups 20 in the battery 100 are arranged in sequence along the first direction L, and all pole core groups 20 are connected in series to form a pole core. string.
  • connection part between the pole core groups 20 becomes the weak part of the entire battery 100, which is likely to be twisted or broken during use of the battery 100, resulting in connection failure.
  • a plurality of pole core groups 20 are connected in series, which increases the risk of the battery moving in the first direction L. Therefore, in the present application, between two pole core groups 20 connected in series, an insulating spacer 30 made by filling the gap between two adjacent pole core groups 20 with an insulating material is provided.
  • connection between the insulating spacer 30 and the two adjacent pole core groups 20 is more stable and reliable, and the connection part of the two pole core groups 20 connected in series is arranged
  • the strength of the connection part of the first electrode 21 and the second electrode 22 can be enhanced, so that the insulating spacer 30 can better fix each pole core group 20 and prevent the pole core group
  • the movement between the electrode core groups 20 keeps the connection between the electrode core groups 20 effectively fixed, and can also increase the strength of the connection part, thereby preventing the connection part between the electrode core groups 20 from being twisted and twisted during the battery use. In case of breakage, the reliability of the connection between the pole core groups 20 is improved.
  • the two pole core sets 20 connected in series are two adjacent pole core sets 20, and the insulating spacer 30 is located between the two adjacent pole core sets 20.
  • an insulating spacer 30 is provided between every two adjacent pole core sets 20, and the insulating spacer 30 can space the two adjacent pole core sets 20.
  • the insulating spacer 30 and the housing 10 are mutually positioned, which is beneficial to The pole core group 20 is further prevented from moving in the first direction L thereof.
  • the battery 100 contains two pole core strings, that is, two pole core sets 20 are provided on each side of the insulating spacer 30 in the first direction L,
  • the number of pole core groups 20 can be increased, thereby increasing the electric capacity of the battery 100.
  • only one pole core group 20 is provided in the second direction W, and the plurality of pole core groups 20 all extend along the first direction L, that is, the insulating spacer 30 is located in the first direction L Only one pole core group 20 is provided on each side of the direction L. In this case, it can be understood that only one pole core string is provided in the battery 100.
  • the housing 10 is a metal housing.
  • metal housing For example, aluminum shell; of course, it can also be made of other metals according to needs. Therefore, the casing 10 has sufficient strength to avoid being damaged or deformed, and the safety of the battery 100 is improved.
  • the packaging film 201 is an aluminum-plastic composite film or a polymer composite film.
  • the first electrode 21 and the second electrode 22 of the pole core group 20 extend out of the packaging film 201. That is, in the embodiment of the present application, the insulating spacer 30 is an insulating spacer 30 disposed outside the packaging film 201, and the insulating spacer 30 is externally provided through the film to improve the reliability of the connection between the pole core groups 20.
  • the pole cores mentioned can also be understood as pole cores commonly used in the field of power batteries. It is understood as the battery itself; the pole core can be a pole core formed by winding, and the pole core generally refers to a component that is not completely sealed. Therefore, the battery 100 mentioned in this application cannot be simply understood as a battery module or a battery pack because it contains multiple pole cores.
  • the pole core set 20 may be composed of a single pole core; it may also include multiple pole cores, and multiple pole cores are connected in parallel to form the pole core set 20.
  • the spacer 30 includes an outer peripheral surface 302 facing the inner surface of the housing 10, and at least one first positioning portion 304 is formed on the outer peripheral surface 302 of the spacer 30 .
  • the inner surface 101 of the housing 10 is formed with a second positioning portion 102 corresponding to the first positioning portion 304 in a one-to-one correspondence.
  • the first positioning portion 304 cooperates with the corresponding second positioning portion 102 to fix the spacer 30 and the housing 10.
  • the first positioning portion 304 of the spacer 30 and the second positioning portion 102 on the housing 10 cooperate with each other to fix the spacer 30 and the housing 10, it is possible to further prevent movement between the pole core groups 20. Improve the anti-movement effect.
  • the first positioning portion 304 is a groove formed by the outer peripheral surface 302 of the insulating spacer 30 recessed into the insulating spacer 30; the second positioning portion 102 is a housing The protrusions formed on the inner surface 101 of 10 are embedded in the grooves to fix the insulating spacer 30 and the housing 10.
  • the protrusions of the housing 10 and the grooves on the insulating spacer 30 are mutually matched to realize the insulating spacers 30 and
  • the fixing and positioning between the casings 10 can further prevent the movement of the pole core assembly 20 and save the space occupied by the battery 100.
  • the insulating spacer 30 may be connected to the largest surface (also referred to as "large surface") of the housing 10, specifically, the thickness of the battery 100 extends along the second direction W, Wherein, the second direction W is perpendicular to the first direction L.
  • the case 10 of each battery 100 includes a first side 11 and a second side 12 on opposite sides in the second direction W, the first side 11 and the second side 12 being the largest surface of the battery 100.
  • a second positioning portion 102 is provided on the first side surface 11 and the second side surface 12 of the housing 10, and the inner peripheral surface of the insulating spacer 30 corresponding to the first side surface 11 and the second side surface 12 is provided with a second positioning portion 102.
  • a positioning portion 304, the first positioning portion 304 and the second positioning portion 102 are in one-to-one correspondence, and the insulation spacer 30 and the housing 10 are fixed by corresponding cooperation.
  • the first positioning portion 304 may also be a protrusion formed on the outer peripheral surface 302 of the insulating spacer 30, and the second positioning portion 102 is the inner surface 101 of the housing 10.
  • the groove is formed on the upper surface, and the protrusion is embedded in the groove to fix the insulating spacer 30 and the housing 10.
  • the grooves of the housing 10 and the protrusions on the insulating spacer 30 are mutually matched to achieve insulation.
  • the fixing and positioning between the spacer 30 and the housing 10 can not only further prevent the movement of the pole core assembly 20, but also save the space occupied by the battery 100.
  • the second positioning portion 102 on the first side surface 11 is a protrusion formed on the inner surface 101 of the housing 10, and the first positioning portion 304 corresponds to the protrusion.
  • the groove is formed on the outer peripheral surface 302 of the insulating spacer 30, and the protrusion and the groove are matched.
  • the second positioning portion 102 on the second side surface 12 is a groove formed on the inner surface 101 of the housing 10, and the first positioning portion 304 is formed on the outer peripheral surface 302 of the insulating spacer 30 corresponding to the protrusion. Protrusion, the protrusion and the groove are matched.
  • the second positioning portion 102 on the first side surface 11 of the battery 100 of the casing 10 is a protrusion
  • the corresponding first positioning portion 304 is a groove
  • the second positioning portion 102 on the second side surface 12 is a groove
  • corresponding to The first positioning portion 304 of is a protrusion
  • the protrusion cooperates with the groove, which realizes the fixation and positioning between the insulating spacer 30 and the housing 10, and also realizes the fixation and positioning between the housing 10 and the housing 10. It is possible to further prevent the movement of the electrode core group 20, and to move between the casings 10 in which adjacent batteries 100 are placed.
  • the insulating spacer 30 includes an outer peripheral surface 302 facing the inner surface of the housing 10, and the housing 10 includes an inner surface 101 facing the insulating spacer 30.
  • the insulating spacer 30 A first adhesive layer 40 is provided between the outer peripheral surface 302 of the 30 and the inner surface of the housing 10 to fix the insulating spacer 30 and the housing 10.
  • the first adhesive layer 40 between the outer peripheral surface 302 of the insulating spacer 30 and the inner surface of the housing 10 to fix the insulating spacer 30 and the housing 10, it is possible to further prevent the gap between the pole core groups 20 Produce movement and improve the anti-movement effect.
  • the first adhesive layer 40 is a heat-sensitive adhesive.
  • the first adhesive layer 40 has adhesiveness to fix the insulating spacer 30 and the housing 10 when the pole core group 20 is loaded into the housing 10 and heated at a predetermined temperature. It should be noted that the first adhesive layer 40 is not sticky before the pole core assembly 20 is installed in the housing 10. When the first adhesive layer 40 is attached to the first adhesive layer after the pole core assembly 20 is installed in the housing 10 The adhesive layer 40 is heated, so that the first adhesive layer 40 has adhesiveness due to heating, thereby fixing the insulating spacer 30 and the housing 10. Therefore, the purpose of fixing the insulating spacer 30 to the housing 10 can be achieved, and the installation can be facilitated.
  • the first adhesive layer 40 is pressure sensitive adhesive.
  • the first adhesive layer 40 has no stickiness before the pole core assembly 20 is installed in the housing 10, and the first adhesive layer 40 has a predetermined pressure after the pole core assembly 20 is installed in the housing 10 Adhesive to fix the insulating spacer 30 and the housing 10. Therefore, the purpose of fixing the insulating spacer 30 to the housing 10 can be achieved, and the installation can be facilitated.
  • the first adhesive layer 40 may also be other types of adhesive, such as double-sided adhesive, etc., which is not limited herein.
  • the first adhesive layer 40 may be provided on all surfaces of the outer circumferential surface 302 of the insulating spacer 30 or on a partial surface of the outer circumferential surface 302 of the insulating spacer 30, which is not limited herein.
  • a second adhesive layer 50 is provided between the outer surface of the pole core set 20 and the inner surface 101 of the housing 10 to fix the pole core set 20 and the housing 10.
  • the pole core set 20 and the housing 10 are fixed by the second adhesive layer 50, so that the pole core set 20 is fixed more stably, and the movement between the pole core sets 20 can be further avoided.
  • the second adhesive layer 50 is a heat-sensitive adhesive or a pressure-sensitive adhesive.
  • the second adhesive layer 50 is a heat-sensitive adhesive.
  • the second adhesive layer 50 has adhesiveness to fix the electrode core group 20 and the housing 10 when the electrode core group 20 is loaded into the housing 10 and heated at a predetermined temperature. It should be noted that the second adhesive layer 50 is not sticky before the pole core assembly 20 is installed in the housing 10.
  • the adhesive layer 50 is heated, so that the second adhesive layer 50 has adhesiveness due to heating, thereby fixing the pole core assembly 20 and the housing 10. Therefore, the purpose of fixing the pole core group 20 and the housing 10 can be achieved, and the installation can be facilitated.
  • the second adhesive layer 50 is a pressure sensitive adhesive.
  • the second adhesive layer 50 has no stickiness before the pole core assembly 20 is installed in the housing 10, and the second adhesive layer 50 has a predetermined pressure after the pole core assembly 20 is installed in the housing 10 Adhesive to fix the pole core group 20 and the housing 10. Therefore, the purpose of fixing the pole core group 20 and the housing 10 can be achieved, and the installation can be facilitated.
  • the second adhesive layer 50 can also be other types of adhesive, such as double-sided adhesive, etc., which is not limited herein.
  • the second adhesive layer 50 is disposed on a large surface of the outer surface of the encapsulation film 201 of the pole core assembly 20, where the large surface refers to the encapsulation film 201 of the pole core assembly 20.
  • the area of the outer surface is larger on one or both of the outer surfaces.
  • the second adhesive layer 50 may be disposed on any surface of the outer surface of the packaging film 201 of the pole core assembly 20, which is not limited herein.
  • the housing 10 is a metal housing
  • the insulating spacer 30 includes an outer peripheral surface 302 facing the inner surface 101 of the housing 10, and an outer peripheral surface 302 of the insulating spacer 30
  • a metal piece 303 is provided thereon, and the metal piece 303 is connected to the housing 10 to fix the insulating spacer 30 and the housing 10.
  • the insulating spacer 30 includes an outer peripheral surface 302 facing the inner surface 101 of the housing 10, and a metal member 303 is provided on the outer peripheral surface 302 of the insulating spacer 30, and the metal member 303 is connected to the housing 10 to connect
  • the insulating spacer 30 and the housing 10 are fixed, which can further prevent the movement between the pole core groups 20 and improve the anti-movement effect.
  • the outer peripheral surface 302 of the insulating spacer 30 is provided with a slot 3021, and the metal member 303 includes a mating portion 3031 And the connecting portion 3032 connected with the mating portion 3031, the mating portion 3031 is clamped in the slot 3021, and the connecting portion 3032 is exposed on the outer peripheral surface 302 to be connected with the housing 10.
  • connection stability between the insulating spacer 30 and the metal piece 303 is increased through the snap fit of the slot 3021 and the mating portion 3031.
  • the mating portion 3031 is a plurality of mating pieces 3033 extending perpendicularly from the periphery of the connecting portion 3032, and there is a gap between the mating pieces 3033.
  • the mating piece 3033 is 6
  • the card slot 3021 is provided with a locking slot 3022 corresponding to each mating piece 3033.
  • the card slot 3021 can be provided with six locking slots 3022 and six locking slots 3022. It is arranged in close contact with the side wall of the card slot 3021.
  • Each mating piece 3033 is inserted into a locking groove 3022 correspondingly.
  • the mating piece 3033 makes the mating portion 3031 have good interchangeability, and it is easier to fit with the corresponding engaging groove 3022.
  • the metal member 303 has a groove structure, and the shape of the groove 3021 is adapted to the opening shape of the groove structure; the side wall of the groove structure is used as the mating portion 3031 to be inserted into the groove 3021 , The groove bottom wall of the groove structure is connected to the housing 10 as a connecting portion 3032.
  • the metal member 303 occupies less space, and the overall structure of the battery 100 is more compact.
  • the slot 3021 and the mating portion 3031 are interference-fitted to be fixed to each other.
  • connection stability between the insulating spacer 30 and the metal piece 303 is increased through the snap fit of the slot 3021 and the mating portion 3031.
  • the metal piece 303 is integrally formed with the insulating spacer 30 by insert molding, and the metal piece is made of aluminum material.
  • the metal member 303 and the housing 30 are fixed by welding, for example, laser welding. As shown in FIG. 9, a laser welding seam 40 is formed between the metal piece 303 and the housing 30.
  • connection stability between the metal member 303 and the housing 30 is better, and the movement of the pole core groups 20 in the first direction L can be prevented, the effectiveness of the connection between the pole core groups 20 can be maintained, and the battery can be increased.
  • the mechanical strength of 100 prevents the battery 100 from being twisted or broken during use.
  • the insulating spacer 30 when the battery 100 contains two pole core strings, that is, there are two pole core groups 20 on each side of the insulating spacer 30 in the first direction L, the insulating spacer 30 includes a line along the second direction W The first insulating part 311, the second insulating part 312, and the third insulating part 313 are arranged in sequence.
  • the second insulating part 312 is located between the first insulating part 311 and the third insulating part 313, and the first insulating part 311 and the third insulating part 313 are The outer sides of the three insulating parts 313 are respectively provided with a slot 3021, and a through hole 301 is formed between the first insulating part 311 and the second insulating part 312 for the connection part of one of the pole core strings to pass through.
  • Another through hole (not shown in the figure) is formed between the part 312 and the third insulating part 313 for the connection part of the other pole string to pass through.
  • the battery 100 is substantially a rectangular parallelepiped, and the battery 100 has a length L, a thickness W, and a height H.
  • the length L is greater than the height H, and the height H is greater than the thickness W.
  • the length of the battery 100 is 400-2500 mm.
  • the ratio of the length to the height of the battery 100 is 4-21.
  • the substantially rectangular parallelepiped shape of the battery 100 can be understood to mean that the battery 100 may be a rectangular parallelepiped shape, a cube shape, or a part of a special shape, but is roughly a rectangular parallelepiped shape, a cube shape; or part of which has gaps, protrusions, chamfers, or arcs. , Curved but the overall shape is similar to a cuboid or a cube.
  • the present application also provides a battery pack, which includes a plurality of batteries 100 provided in the present application or battery modules provided in the present application.
  • the battery pack 200 provided in the present application includes a tray 22 and batteries 100 arranged on the tray 22.
  • the present application provides an automobile 1000, including: the battery pack 200 provided in the present application.
  • the car provided in this application includes a battery pack 200.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Connection Of Batteries Or Terminals (AREA)
  • Battery Mounting, Suspending (AREA)
  • Sealing Battery Cases Or Jackets (AREA)
  • Cell Separators (AREA)
  • Secondary Cells (AREA)

Abstract

一种电池(100): 包括壳体(10)和封装于壳体(10)内的多个极芯组(20)，相邻两个极芯组(20)串联，极芯组(20)包括封装膜(201)和至少一个极芯(202)，极芯(202)位于封装膜(201)围成的容纳腔内; 极芯组(20)包括第一电极(21)和第二电极(22)，第一电极(21)和第二电极(22)伸出封装膜(201)外，相邻两个极芯组(20)中的其中一个的第一电极21与另一个的第二电极22电连接，相邻两个极芯组(20)之间的空隙填充有绝缘材料，以在相邻两个极芯组(20)之间形成绝缘间隔件(30)，相邻两个极芯组(20)的连接部位位于绝缘间隔件(30)内。

Description

电池、电池包及汽车
相关申请的交叉引用
本申请要求比亚迪股份有限公司于2020年05月18日提交的、申请名称为“一种电池、电池包及汽车”的、中国专利申请号“202020848060.X”的优先权。
技术领域
本申请涉及电池领域，具体涉及一种电池、电池包及汽车。
背景技术
现有技术中，为提高电池的容量，在电池的壳体内串联有多个极芯，在电池使用过程中极芯间的连接部位容易发生扭曲、折断等；另外，在振动、颠簸情况下，多个极芯容易在壳体里窜动，极芯与极芯之间会发生相对位移，对极芯产生损伤，例如，集流体破损，隔膜打皱、极片上活性材料层脱落，电池的稳定性较差，也容易发生安全问题。
发明内容
本申请旨在至少解决现有技术中存在的技术问题之一。为此，本申请提出一种电池，所述电池的极芯组之间的连接可靠性更高。
一种电池，包括壳体和封装于所述壳体内的多个极芯组，相邻两个所述极芯组之间串联，所述极芯组包括封装膜和至少一个极芯，所述极芯位于所述封装膜围成的容纳腔内；所述极芯组包括用于引出电流的第一电极和第二电极，所述第一电极和第二电极伸出所述封装膜外，相邻两个极芯组中的其中一个的第一电极与另一个的第二电极电连接，相邻两个极芯组之间的空隙填充有绝缘材料，以在相邻两个极芯组之间形成绝缘间隔件，相邻两个极芯组的连接部位位于所述绝缘间隔件内。
由此，在相邻两个极芯组之间设有绝缘间隔件，并使两个极芯组的连接部位设置在绝缘间隔件内，由此利用绝缘间隔件可以更好地将各极芯组固定，防止极芯组之间的窜动，保持极芯组之间的可靠连接，并且还可增强连接部位的强度，从而防止在电池使用过程中，相邻两个极芯组之间的连接部位发生扭曲、断裂等情况，提高极芯组之间的连接稳定性。
一种电池包，包括上述电池。
一种汽车，包括上述电池包。
本申请的附加方面和优点将在下面的描述中部分给出，部分将从下面的描述中变得明显，或通过本申请的实践了解到。
附图说明
本申请的上述和/或附加的方面和优点从结合下面附图对实施例的描述中将变得明显和容易理解，其中：
图1为本申请一实施例提供的一种电池的结构示意图。
图2为本申请第一实施例提供的一种电池去掉壳体之后的结构示意图。
图3为本申请一实施例提供的极芯组的结构示意图。
图4为图3在IV-IV处的截面示意图。
图5为本申请第一实施例中图1在V-V处的截面示意图。
图6为图5在另一实施例中的截面示意图。
图7为图5在又一实施例中的截面示意图。
图8为本申请第二实施例中图1在VIII-VIII处的截面示意图。
图9为图8在第三实施例中的截面示意图。
图10为本申请第三实施例的电池去掉壳体之后的拆解示意图。
图11为本申请一实施例中的电池包的结构示意图。
图12为本申请一实施例中的汽车的示意图。
具体实施方式
下面详细描述本申请的实施例，所述实施例的示例在附图中示出，其中自始至终相同或类似的标号表示相同或类似的元件或具有相同或类似功能的元件。下面通过参考附图描述的实施例是示例性的，仅用于解释本申请，而不能理解为对本申请的限制。
在本申请的描述中，需要理解的是，术语“中心”、“上”、“下”、“前”、“后”、“左”、“右”、“竖直”、“水平”、“顶”、“底”“内”、“外”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本申请和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本申请的限制。
需要说明的是，术语“第一”、“第二”仅用于描述目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括一个或者更多个该特征。进一步地，在本申请的描述中，除非另有说明，“多个”的含义是两个或两个以上。
本申请提供了一种电池100，包括壳体10和封装于壳体10内的多个极芯组20，相邻两个极芯组20串联，极芯组20包括封装膜201和至少一个极芯202，极芯202位于封装膜201围成的容纳腔内；极芯组20包括用于引出电流的第一电极21和第二电极22，第一电极21和第二电极22伸出封装膜201外，相邻两个极芯组20中的其中一个的第一电极21与另一个的第二电极22电连接，相邻两个极芯组20之间的空隙填充有绝缘材料，以在相邻两个极芯组20之间形成绝缘间隔件30，相邻两个极芯组20的连接部位位于绝缘间隔件30内。
与现有技术相比，本申请的有益效果在于：
本申请中，在相邻两个极芯组20之间设有绝缘间隔件30，并使两个极芯组20的连接部位设置在绝缘间隔件30内，由此利用绝缘间隔件30可以更好地将各极芯组20固定，防止极芯组20之间的窜动，保持极芯组20之间的可靠连接，并且还可增强连接部位的强度，从而防止在电池100使用过程中，相邻两个极芯组20之间的连接部位发生扭曲、断裂等情况，提高极芯组20之间的连接稳定性。
请参考图1和图2，电池100包括壳体10和封装于壳体10内的多个极芯组20，相邻两个极芯组20串联。请参考图3和图4，极芯组20包括封装膜201和至少一个极芯202，极芯202位于封装膜201围成的容纳腔内。在本申请的一些实例中，封装膜201为铝塑复合膜或高分子材料复合膜。极芯组20包括用于引出电流的第一电极21和第二电极22，第一电极21和第二电极22中的其中一个为正电极，另一个为负电极，第一电极21和第二电极22伸出封装膜201外，相邻两个极芯组20中的其中一个的第一电极21与另一个的第二电极22电连接，相邻两个极芯组20之间的空隙填充有绝缘材料，以在相邻两个极芯组20之间形成绝缘间隔件30，相邻两个极芯组20的连接部位位于绝缘间隔件30内。
在本申请的一些实例中，电池100的长度沿第一方向L延伸，极芯组20的厚度沿第二方向W延伸，其中，第二方向W与第一方向L相互垂直。极芯组20的长度沿第一方向L延伸，多个极芯组20沿第一方向L排列；另外，极芯组20的第一电极21和第二电极22设置在极芯组20沿第一方向L的相对两端，并且，串联连接的两个极芯组20为相邻两个极芯组20，即本申请实施例中，相邻两个极芯组20为串联。因此，多个极芯组20采用“头对头”的排布方式，此排布方式可以较为方便地实现极芯组20之间的两两串联，连接结构简单。另外该种排布方式可以较为方便的制造长度较长的电池100，由此在将电池100安装进电池包200外壳内时，可以不需要设置横梁和纵梁等支撑结构，而是利用电池100本身的壳体10作支撑而将电池100直接安装在电池包200外壳上，由此可以节省电池包200内部空间，提高电池包200的体积利用率，提高电池包200的能量密度，且有利于降低电池包200的重量。
在本申请的一些实例中，多个极芯组20可以构成两个极芯串，即电池100内可以含有两个极芯串，两个极芯串可以为串联的关系，例如两个极芯串的连接方式可以是“U”形连接，即两个极芯串位于第一方向L的同一端的相应电极串联，而两个极芯串位于第一方向L的另一端上的相应电极分别为电池的正负极。
每个极芯串有多个极芯组20，两个极芯串沿第二方向W排列，而每个极芯串中的多个极芯组20沿第一方向L排列。另外，极芯组20的第一电极21和第二电极22设置在极芯组20沿第一方向L的相对两端，并且，串联连接的两个极芯组20为相邻两个极芯组20。即本申请实施例中，对于每个极芯串中的多个极芯组20，相邻两个极芯组20为串联，因此，每个极芯串的多个极芯组20采用“头对头”的排布方式，此排布方式可以较为方便地实现极芯组20之间的两两串联，连接结构简单。
当然，在其他实施例中，电池100也可以仅是设置一个极芯串，即电池100内的所有极芯组20均是沿第一方向L依次排列，所有极芯组20串联形成一个极芯串。
多个极芯组20串联时，极芯组20之间的连接部位成了整个电池100的薄弱部，在电池100使用过程中容易发生扭曲或断裂等，从而导致连接失效，同时由于电池100内串联了多个极芯组20，增加电池在第一方向L上窜动的风险。所以，本申请中，在串联连接的两个极芯组20之间设有通过在相邻两个极芯组20之间的空隙填充绝缘材料而制成的绝缘间隔件30，绝缘间隔件30能够与相邻的两个极芯组20粘连，使得绝缘间隔件30与相邻两个极芯组20之间的连接更加稳定可靠，并使串联连接的两个极芯组20的连接部位设置在绝缘间隔件30内，可增强第一电极21和第二电极22的连接部位的强度，由此利用绝缘间隔件30可以更好地将各极芯组20更好的固定，防止极芯组20之间的窜动，保持极芯组20之间连接的有效性地固定，并且还可增强连接部位的强度，从而可防止在电池使用过程中极芯组20之间的连接部位发生扭曲、断裂等情况，提高极芯组20之间连接的可靠性。
在本申请的一些实施例中，串联连接的两个极芯组20为相邻两个极芯组20，绝缘间隔件30位于相邻两个极芯组20之间。
从而，每相邻的两个极芯组20之间都设置有绝缘间隔件30，绝缘间隔件30可以间隔相邻两个极芯组20，绝缘间隔件30与壳体10相互定位，有利于进一步防止极芯组20在其第一方向L上发生窜动。
在本申请的其中一些实施例中，当电池100中含有两个极芯串时，也就是说，位于绝缘间隔件30在第一方向L的每一侧都设置有两个极芯组20，从而，可以增加极芯组20的数量，从而增加电池100的电容量。
在本申请的另一些实施例中，在第二方向W上仅设置一个极芯组20，多个极芯组20均沿第一方向L延伸，也就是说，位于绝缘间隔件30在第一方向L的每一侧仅设置一个极芯组20，此种情况可以理解为电池100内仅设置一个极芯串的情况。
本申请的一个实施例中，壳体10为金属壳体。比如，铝壳；当然，根据需要也可以选择其他金属制成。从而，壳体10具有足够的强度，避免被撞坏或者变形，提高电池100的安全性。
在本申请的一些实例中，封装膜201为铝塑复合膜或高分子材料复合膜。极芯组20的第一电极21和第二电极22伸出封装膜201外。即本申请实施例中，绝缘间隔件30是设置在封装膜201之外的绝缘间隔件30，通过膜外设绝缘间隔件30以提高极芯组20之间连接的可靠性。
在本申请的一些实施例中，所提到的极芯，也可以理解为动力电池领域常用的极芯，极芯以及极芯组20为电池100的壳体10内部的组成部分，而不能被理解为电池本身；极芯可以是卷绕形成的极芯，极芯一般是指未完全密封的组件。因而，在本申请提到的电池100，不能因其包含多个极芯，而将其简单的理解为电池模组或电池组。在本申请中，极芯组20可以是由一个单独的极芯组成；也可以包括多个极芯，且多个极芯并联连接，构成极芯组20。
请一并参考图5，在本申请的第一实施例中，隔圈30包括面对壳体10内表面的外周面302，隔圈30的外周面302上形成有至少一个第一定位部304。壳体10的内表面101形成 有与第一定位部304一一对应的第二定位部102。第一定位部304与对应的第二定位部102配合以将隔圈30和壳体10固定。
从而，通过使隔圈30的第一定位部304与壳体10上的第二定位部102相互配合以将隔圈30和壳体10固定，可以进一步防止极芯组20之间产生窜动，提高防窜动效果。
在本申请的其中一些实施例中，请参考图5，第一定位部304为绝缘间隔件30的外周面302向绝缘间隔件30内部凹陷而形成的凹槽；第二定位部102为壳体10的内表面101上形成的凸起，凸起嵌入凹槽中以将绝缘间隔件30和壳体10固定。
从而，通过直接在绝缘间隔件30上形成凹槽，以及直接在壳体10上形成凸起，以通过壳体10的凸起与绝缘间隔件30上的凹槽相互配合实现绝缘间隔件30和壳体10之间的固定和定位，既可以进一步防止极芯组20的窜动，又节省了电池100的占用空间。
其中，如图5所示，绝缘间隔件30可以是与壳体10的最大面积的表面(也可称为“大面”)进行连接，具体地，电池100的厚度沿第二方向W延伸，其中，第二方向W与第一方向L相垂直。每个电池100的壳体10包括在第二方向W相对两侧的第一侧面11和第二侧面12，第一侧面11和第二侧面12为电池100的最大表面。其中，在壳体10的第一侧面11和第二侧面12上均设置有第二定位部102，绝缘间隔件30的与第一侧面11和第二侧面12对应的内周面上设置有第一定位部304，第一定位部304和第二定位部102一一对应，以相应配合实现绝缘间隔件30和壳体10的固定。
在本申请的另一些实施例中，请参考图6，第一定位部304也可以为绝缘间隔件30的外周面302上形成的凸起，第二定位部102为壳体10的内表面101上形成的凹槽，凸起嵌入凹槽中以将绝缘间隔件30和壳体10固定。
从而，通过直接在绝缘间隔件30上形成凸起，以及直接在壳体10的内表面101上形成凹槽，以通过壳体10的凹槽与绝缘间隔件30上的凸起相互配合实现绝缘间隔件30和壳体10之间的固定和定位，既可以进一步防止极芯组20的窜动，又节省了电池100的占用空间。
在本申请的又一些实施例中，请参考图7，第一侧面11上的第二定位部102为壳体10的内表面101上形成的凸起，第一定位部304为与凸起对应的在绝缘间隔件30的外周面302上形成的凹槽，凸起与凹槽相配合。第二侧面12上的第二定位部102为壳体10的内表面101上形成的凹槽，第一定位部304为与凸起对应的且设置在绝缘间隔件30的外周面302上形成的凸起，凸起与凹槽相配合。
从而，电池100的壳体10的第一侧面11的第二定位部102为凸起，对应的第一定位部304为凹槽，第二侧面12上的第二定位部102为凹槽，对应的第一定位部304为凸起，凸起与凹槽配合，即实现绝缘间隔件30和壳体10之间的固定和定位，又实现壳体10与壳体10之间的固定与定位，既可以进一步防止极芯组20的窜动，又可以放置相邻电池100的壳体10之间的相互移动。
请参考图8，在本申请的第二实施例中，绝缘间隔件30包括面对壳体10内表面的外周面302，壳体10包括面对绝缘间隔件30的内表面101，绝缘间隔件30的外周面302与壳体10的内表面之间设置有第一黏胶层40，以将绝缘间隔件30和壳体10固定。
从而，通过使绝缘间隔件30的外周面302与壳体10的内表面之间设置有第一黏胶层40以将绝缘间隔件30和壳体10固定，可以进一步防止极芯组20之间产生窜动，提高防窜动效果。
在本申请的一些实例中，第一黏胶层40为热敏胶。第一黏胶层40在极芯组20装入壳体10内之后且受到预定温度的加热的情况下具有粘性以将绝缘间隔件30和壳体10固定。需要说明的是，第一黏胶层40在极芯组20装入壳体10内之前没有粘性，当第一黏胶层40在极芯组20装入壳体10内之后，对第一黏胶层40进行加热，使得第一黏胶层40因为加热而具有粘性，从而将绝缘间隔件30与壳体10固定。从而，既能够达到将绝缘间隔件30与壳体10固定的目的，又能够方便安装。
本申请的另一些实施例中，第一黏胶层40为压敏胶。第一黏胶层40在极芯组20装入壳体10内之前没有粘性，第一黏胶层40在极芯组20装入壳体10内之后且受到预定压力的挤压的情况下具有粘性以将绝缘间隔件30和壳体10固定。从而，既能够达到将绝缘间隔件30与壳体10固定的目的，又能够方便安装。
当然，在其它实施例中，第一黏胶层40还可以是其它类型的胶，例如，双面胶等，在此不做限定。
可以理解的是，第一黏胶层40可以设置在绝缘间隔件30的外周面302的所有表面上，或者设置在绝缘间隔件30的外周面302的部分表面上，在此不做限定。
在本申请的一些实例中，极芯组20的外表面与壳体10的内表面101之间设置有第二黏胶层50以将极芯组20和壳体10固定。
从而，将极芯组20与壳体10之间通过第二黏胶层50固定，使得极芯组20的固定更加稳定，能够进一步避免极芯组20之间的窜动。
在本申请的一些实例中，第二黏胶层50为热敏胶或压敏胶。
在本申请的一些实例中，第二黏胶层50为热敏胶。第二黏胶层50在极芯组20装入壳体10内之后且受到预定温度的加热的情况下具有粘性以将极芯组20和壳体10固定。需要说明的是，第二黏胶层50在极芯组20装入壳体10内之前没有粘性，当第二黏胶层50在极芯组20装入壳体10内之后，对第二黏胶层50进行加热，使得第二黏胶层50因为加热而具有粘性，从而将极芯组20与壳体10固定。从而，既能够达到将极芯组20与壳体10固定的目的，又能够方便安装。
本申请的另一些实施例中，第二黏胶层50为压敏胶。第二黏胶层50在极芯组20装入壳体10内之前没有粘性，第二黏胶层50在极芯组20装入壳体10内之后且受到预定压力的挤压的情况下具有粘性以将极芯组20和壳体10固定。从而，既能够达到将极芯组20与壳体10固定的目的，又能够方便安装。
当然，在其它实施例中，第二黏胶层50还可以是其它类型的胶，例如，双面胶等，在此不做限定。
可以理解的是，在其中一个实施例中，第二黏胶层50设置在极芯组20的封装膜201的外表面的大面上，其中，大面是指极芯组20的封装膜201的外表面中的面积比较大的其 中一个或者两个外表面上。在其它实施例中，第二黏胶层50可以设置在极芯组20的封装膜201的外表面的任意一个表面上，在此不做限定。
在本申请的第三实施例中，请参考图9，壳体10为金属壳体，绝缘间隔件30包括面对壳体10的内表面101的外周面302，绝缘间隔件30的外周面302上设置有金属件303，金属件303与壳体10连接以将绝缘间隔件30和壳体10固定。
从而，本申请中，绝缘间隔件30包括面对壳体10的内表面101的外周面302，绝缘间隔件30的外周面302上设置有金属件303，金属件303与壳体10连接以将绝缘间隔件30和壳体10固定，可以进一步防止极芯组20之间产生窜动，提高防窜动效果。
在本申请的其中一些实施例中，请参考图10，为了便于金属件303与绝缘间隔件30的固定，绝缘间隔件30的外周面302上设置有卡槽3021，金属件303包括配合部3031和与配合部3031连接的连接部3032，配合部3031卡设于卡槽3021内，连接部3032外露于外周面302上以与壳体10连接。
从而，通过卡槽3021与配合部3031的卡扣配合，增加了绝缘间隔件30与金属件303的连接稳定性。
在本申请的其中一些实施例中的，配合部3031为自连接部3032的周缘垂直伸出的若干配合片3033，配合片3033之间具有间隙，例如，本实施例中，配合片3033为6片，且两两配合片3033之间具有间隙。同样地，卡槽3021内部设置有与每个配合片3033相对应的卡合槽3022，例如，本实施例中，卡槽3021内部可以设置6个卡合槽3022，且六个卡合槽3022贴合卡槽3021的侧壁设置。每个配合片3033对应插入一个卡合槽3022。
从而，配合片3033使得配合部3031的互换性好，更容易与对应的卡合槽3022配合。
在本申请的其中一些实施例中，金属件303为凹槽结构，卡槽3021的形状与凹槽结构的开口形状相适配；凹槽结构的侧壁作为配合部3031卡入卡槽3021内，凹槽结构的凹槽底壁作为连接部3032与壳体10连接。
从而，使得金属件303的所占空间更少，使得电池100的整体结构更紧凑。
在本申请的其中一些实施例中，卡槽3021与配合部3031过盈配合而相互固定。
从而，通过卡槽3021与配合部3031的卡扣配合，增加了绝缘间隔件30与金属件303的连接稳定性。
在本申请的其中一些实施例中，金属件303通过嵌件成型的方式与绝缘间隔件30一体成型，金属件为铝材料制成。
从而，减少了安装金属件303的工序，且金属件303与绝缘间隔件30的连接稳定性更好。
在本申请的其中一些实施例中，金属件303与壳体30通过焊接方式固定，例如，激光焊接。如图9中所示，在金属件303与壳体30之间形成激光焊缝40。
从而，金属件303与壳体30之间的连接稳定性更好，可以防止极芯组20之间在第一方向L上的窜动，保持极芯组20之间连接的有效性，增加电池100的机械强度，防止电池100在使用过程中发生扭曲、断裂等情况。
参阅图9，当电池100内含有两个极芯串，即位于绝缘间隔件30在第一方向L的每一侧均有两个极芯组20时，绝缘间隔件30包括沿第二方向W依次设置的第一绝缘部分311、第二绝缘部分312和第三绝缘部分313，其中，第二绝缘部分312位于第一绝缘部分311和第三绝缘部分313之间，第一绝缘部分311和第三绝缘部分313的外侧分别设置有卡槽3021，并且在第一绝缘部分311和第二绝缘部分312之间形成通孔301用于供其中一极芯串的连接部位穿设其中，第二绝缘部分312和第三绝缘部分313之间形成另一通孔(附图未示出)用于供其中另一极芯串的连接部位穿设其中。
在本申请的一些实施例中，电池100大体为长方体，电池100具有长度L、厚度W和高度H，长度L大于高度H，高度H大于厚度W。其中，电池100的长度为400-2500mm。电池100的长度与高度的比值为4-21。
需要说明的是，电池100大体为长方体可以理解为，电池100可为长方体形、正方体形，或局部存在异形，但大致为长方体形、正方体形；或部分存在缺口、凸起、倒角、弧度、弯曲但整体呈近似长方体形、正方体形。
本申请还提供了一种电池包，包括多个本申请提供的电池100或者本申请提供的电池模组。请参阅图11，本申请提供的电池包200，包括托盘22和排布在托盘22上的电池100。
本申请提供了一种汽车1000，包括：本申请提供的电池包200。
请参阅图12，本申请提供的汽车，包括：电池包200。
尽管已经示出和描述了本申请的实施例，本领域的普通技术人员可以理解：在不脱离本申请的原理和宗旨的情况下可以对这些实施例进行多种变化、修改、替换和变型，本申请的范围由权利要求及其等同物限定。

Claims (10)

  1. 一种电池，其特征在于，包括壳体和封装于所述壳体内的多个极芯组，相邻两个所述极芯组串联，所述极芯组包括封装膜和至少一个极芯，所述极芯位于所述封装膜围成的容纳腔内；
    所述极芯组包括用于引出电流的第一电极和第二电极，所述第一电极和第二电极伸出所述封装膜外，两个所述极芯组中其中一个的第一电极与另一个的第二电极连接，相邻两个所述极芯组之间的空隙填充有绝缘材料，以在相邻两个所述极芯组之间形成绝缘间隔件，相邻两个所述芯组的连接部位位于所述绝缘间隔件内。
  2. 根据权利要求1所述的电池，其特征在于，所述绝缘间隔件包括面对壳体内表面的外周面，所述绝缘间隔件的外周面上形成有至少一个第一定位部，所述壳体的内表面形成有与所述第一定位部对应的第二定位部，所述第一定位部与对应的所述第二定位部配合以将所述绝缘间隔件和壳体固定。
  3. 根据权利要求2所述的电池，其特征在于，所述第一定位部为所述绝缘间隔件外周面向绝缘间隔件内部凹陷而形成的凹槽，所述第二定位部为所述壳体内表面上形成的凸起，所述凸起嵌入所述凹槽中；或者，所述第一定位部为所述绝缘间隔件外周面上形成的凸起，所述第二定位部为所述壳体内表面上形成的凹槽，所述凸起嵌入所述凹槽中。
  4. 根据权利要求1所述的电池，其特征在于，所述绝缘间隔件包括面对壳体内表面的外周面，所述壳体包括面对所述绝缘间隔件的内表面，所述绝缘间隔件的外周面与所述壳体的内表面之间设置有第一黏胶层，以将所述绝缘间隔件和壳体固定；和/或，
    所述极芯组的外表面与所述壳体的内表面之间设置有第二黏胶层以将所述极芯组和壳体固定；所述第一黏胶层和/或第二黏胶层为热敏胶或压敏胶。
  5. 根据权利要求1所述的电池，其特征在于，所述绝缘间隔件包括面对壳体内表面的外周面，所述绝缘间隔件的外周面上设置有金属件，所述金属件与所述壳体连接以将所述绝缘间隔件和所述壳体固定。
  6. 根据权利要求5所述的电池，其特征在于，所述绝缘间隔件的外周面上设置有卡槽，所述金属件包括配合部和与所述配合部连接的连接部，所述配合部卡设于所述卡槽内，所述连接部外露于外周面上以与所述壳体连接；
    所述金属件为凹槽结构，所述卡槽的形状与所述凹槽的开口形状相适配；所述凹槽的侧壁作为所述配合部卡入所述卡槽内，所述凹槽底壁作为所述连接部与所述壳体连接。
  7. 根据权利要求5所述的电池，其特征在于，所述金属件通过嵌件成型的方式与所述绝缘间隔件一体成型，所述金属件为铝材料制成；所述金属件与所述壳体通过焊接方式固定。
  8. 根据权利要求1-7中任一项所述的电池，其特征在于，所述电池的长度沿第一方向延伸，所述极芯组的长度沿第一方向延伸，多个所述极芯组沿第一方向排列。
  9. 一种电池包，其特征在于，包括多个权利要求1-8中任一项所述的电池。
  10. 一种汽车，其特征在于，包括权利要求9所述的电池包。
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