WO2019114781A1 - 电池和具有其的电池包、电动汽车 - Google Patents

电池和具有其的电池包、电动汽车 Download PDF

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Publication number
WO2019114781A1
WO2019114781A1 PCT/CN2018/120788 CN2018120788W WO2019114781A1 WO 2019114781 A1 WO2019114781 A1 WO 2019114781A1 CN 2018120788 W CN2018120788 W CN 2018120788W WO 2019114781 A1 WO2019114781 A1 WO 2019114781A1
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WO
WIPO (PCT)
Prior art keywords
pole
tab
side region
pole core
terminal
Prior art date
Application number
PCT/CN2018/120788
Other languages
English (en)
French (fr)
Inventor
刘彦初
姚斌
杨超
公绪斌
张勇
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 US16/772,488 priority Critical patent/US20200403214A1/en
Priority to EP18887351.7A priority patent/EP3726621A4/en
Priority to KR1020207020202A priority patent/KR102427427B1/ko
Publication of WO2019114781A1 publication Critical patent/WO2019114781A1/zh

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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
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/528—Fixed electrical connections, i.e. not intended for disconnection
    • 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
    • H01M50/172—Arrangements of electric connectors penetrating the casing
    • 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
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/052—Li-accumulators
    • H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
    • 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
    • H01M50/147—Lids or covers
    • 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
    • H01M50/147—Lids or covers
    • H01M50/148—Lids or covers characterised by their shape
    • H01M50/15—Lids or covers characterised by their shape 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
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
    • H01M50/503—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing characterised by the shape of the interconnectors
    • 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
    • H01M50/514—Methods for interconnecting adjacent batteries or cells
    • H01M50/516—Methods for interconnecting adjacent batteries or cells by welding, soldering or brazing
    • 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
    • H01M50/531—Electrode connections inside a battery casing
    • 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
    • H01M50/543—Terminals
    • H01M50/547—Terminals characterised by the disposition of the terminals on the cells
    • H01M50/55—Terminals characterised by the disposition of the terminals on the cells on the same side of the cell
    • 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
    • H01M50/543—Terminals
    • H01M50/552—Terminals characterised by their shape
    • H01M50/553—Terminals adapted for prismatic, pouch or rectangular cells
    • H01M50/557—Plate-shaped terminals
    • 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
    • H01M50/543—Terminals
    • H01M50/564—Terminals characterised by their manufacturing process
    • H01M50/566—Terminals characterised by their manufacturing process by welding, soldering or brazing
    • 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
    • H01M50/543—Terminals
    • H01M50/564—Terminals characterised by their manufacturing process
    • H01M50/567—Terminals characterised by their manufacturing process by fixing means, e.g. screws, rivets or bolts
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

Definitions

  • the present disclosure relates to the technical field of electric vehicles, and relates to a battery and a battery pack and an electric vehicle therewith.
  • the lithium ion battery tab includes a positive electrode tab and a negative electrode tab, and the positive electrode tab and the negative electrode tab are composed of a plurality of layers of a very thin copper foil or aluminum foil laminate.
  • a connecting piece structure is usually added between the pole and the pole terminal of the cover plate, and one end of the connecting piece is first connected to the tab, and the other end of the connecting piece is connected to the cover.
  • the positive electrode tab is connected to the positive electrode connecting piece
  • the negative electrode tab is connected to the negative electrode connecting piece
  • the positive electrode connecting piece is connected to the corresponding positive pole terminal of the cover plate
  • the negative electrode connecting piece is connected to the corresponding negative pole terminal of the cover plate.
  • connection of the tabs connected by this connection to the cover requires a two-step soldering process, whereby the assembly process is complicated and the internal resistance of the battery and other risks are increased due to multiple soldering.
  • the pole core of the battery and the cover plate can only be connected one by one, and then the assembled batteries are connected in parallel or in series to change the capacitance or voltage of the battery pack, the structure is complicated, and the battery pack has a large volume.
  • the present disclosure is intended to address at least one of the technical problems existing in the prior art. To this end, the present disclosure proposes a battery that is simpler in assembly process and can meet more usage requirements.
  • the present disclosure also proposes a battery pack having the above battery.
  • the present disclosure also proposes an electric vehicle having the above battery pack.
  • a battery includes: a housing; a cover plate at an end of the housing; the cover having a first side area and a second side area arranged in a lateral or longitudinal direction thereof a pole terminal, the pole terminal is disposed on the cover, a portion of the pole terminal is located in the first side region and another portion is located in the second side region; a first pole core, the first a pole core is located in the housing, the first pole core corresponds to the first side region position, the first pole core has a first tab, and at least a portion of the first tab follows a first side region extending to a direction of the second side region and connected to at least a portion of the pole terminal; a second pole core, the second pole core being located in the housing, the second pole core The second side region corresponds to a position, the second pole core has a second tab, and at least a portion of the second tab extends in a direction from the second side region to the first side region and at least Connected to the other portion of the pole terminal.
  • the battery according to the embodiment of the present disclosure can satisfy more use requirements, has smaller volume, is more practical, and can save the connection piece structure, the connection structure is firmer, the assembly process is simpler, the production cost is lower, and the reduction can be reduced. Internal resistance is conducive to improving the market competitiveness of the battery.
  • the battery according to the above embodiment of the present disclosure may also have the following additional technical features:
  • the pole terminal includes: a plate body provided on a surface of the cover plate facing the first pole core and the second pole core, A portion of the plate-like body is located within the first side region and another portion is located within the second side region, the first tab being coupled to at least the portion of the plate-like body and the second tab Connecting at least to the other portion of the plate-like body; a columnar body connected to the plate-like body and extending through the cover plate to extend away from the cover plate toward the first portion The surface of the pole core and the second pole core.
  • the first side region and the second side region are arranged along a lateral direction of the cover plate and are demarcated by a lateral center line of the cover plate, and the plate-like bodies are evenly distributed within the first side region and the second side region.
  • a surface of the plate-shaped body facing the first pole core and the second pole core is configured as a mounting plane, and the at least a portion of the first tab is parallel to the The mounting plane is coupled to the mounting plane, the at least a portion of the second tab being parallel to the mounting plane and coupled to the mounting plane.
  • the first tab includes: a first connecting portion extending from the first pole core away from the second pole core; a first bend a first bent portion connected to the first connecting portion and bent in a direction of the second pole core; a first mounting portion, the first mounting portion being connected to the first bending portion And extending in a direction toward the second pole core, the first mounting portion being parallel to the mounting plane and connected to the mounting plane.
  • the second tab includes: a second connecting portion extending from the second pole core away from the first pole core; a second bend a second bent portion connected to the second connecting portion and bent in a direction of the first pole core; and a second mounting portion connected to the second bent portion And extending in a direction toward the first pole core, the second mounting portion being parallel to the mounting plane and connected to the mounting plane.
  • the at least a portion of the first tab is integrally disposed, spaced apart, offset, or overlapped with the at least a portion of the second tab.
  • the at least a portion of the first tab is coupled to the post terminal by any one of laser welding, ultrasonic welding, and riveting.
  • the at least a portion of the second tab is coupled to the post terminal by any one of laser welding, ultrasonic welding, and riveting.
  • the first pole core has two first poles spaced apart along a length thereof and is a first positive ear and a first negative ear, respectively
  • the second core has Two second poles spaced apart along the length direction thereof are respectively a second positive electrode ear and a second negative electrode ear
  • the pole terminal is two and is a positive pole terminal and a negative pole terminal, respectively.
  • a positive electrode tab and a second positive electrode tab are connected to the positive electrode post terminal, and the first negative electrode tab and the second negative electrode tab are connected to the negative electrode post terminal.
  • a battery pack according to an embodiment of the present disclosure includes a battery according to an embodiment of the present disclosure.
  • An electric car according to an embodiment of the present disclosure includes a battery pack according to an embodiment of the present disclosure.
  • FIG. 1 is a schematic view showing a connection structure of one state of a battery according to an embodiment of the present disclosure
  • FIG. 2 is a schematic view showing a connection structure of another state of a battery according to an embodiment of the present disclosure
  • FIG. 3 is a schematic structural view of a battery according to an embodiment of the present disclosure.
  • FIG. 4 is a schematic structural view of a battery according to another embodiment of the present disclosure.
  • FIG. 5 is a schematic structural view of a battery according to still another embodiment of the present disclosure.
  • FIG. 6 is a schematic view showing a connection structure of a cover plate and a pole terminal of a battery according to an embodiment of the present disclosure.
  • First pole core 10 First pole core 10; first pole 11; first connecting portion 111; first bent portion 112; first mounting portion 113; first positive electrode tab 12; first negative electrode tab 13;
  • a second pole 20 a second pole 21; a second connecting portion 211; a second bent portion 212; a second mounting portion 213; a second positive electrode 22;
  • Cover plate 30 first side region 301; second side region 302;
  • Pole terminal 40 mounting plane 401; plate body 402; columnar body 403; positive pole terminal 41; negative pole terminal 42;
  • a battery 100 according to an embodiment of the present disclosure will be described below with reference to FIGS.
  • a battery 100 may include a housing (not shown), a cover 30 , a pole terminal 40 , a first pole core 10 , and a second pole core 20 . .
  • the cover plate 30 may be located at an end of the housing, and the cover plate 30 has a first side region 301 and a second side region 302, and the first side region 301 and the second side region 302 may be along the cover
  • the lateral arrangement of the plates 30 can also be arranged in the longitudinal direction of the cover plate 30.
  • the lateral direction of the cover plate 30 can be understood as the front-rear direction as shown in FIG. 2, that is, the width direction of the cover plate 30, and the longitudinal direction of the cover plate 30 can be understood as the left-right direction as shown in FIG. 2, that is, the cover.
  • the length direction of the plate 30 can be understood as the front-rear direction as shown in FIG. 2, that is, the width direction of the cover plate 30, and the longitudinal direction of the cover plate 30 can be understood as the left-right direction as shown in FIG. 2, that is, the cover.
  • the length direction of the plate 30 can be understood as the front-rear direction as shown in FIG. 2, that is, the width direction of the cover plate 30, and the longitudinal direction of
  • the pole terminal 40 may be disposed on the cover plate 30, a portion of the pole terminal 40 may be located in the first side region 301, and another portion of the pole terminal 40 may be located in the second side region 302, that is, the pole terminal 40
  • the first side region 301 and the second side region 302 are disposed across the cover plate 30.
  • first side region 301 and the second side region 302 are both spatial regions.
  • a portion of the cover 30 is referred to as a first side region 301, and another portion of the cover 30 is referred to as It is the second side area 302.
  • the first pole core 10 and the second pole core 20 may be located within the housing, wherein, as shown in FIG. 3, the first pole core 10 may correspond to the first side region 301, and the second pole core 20 may be coupled to the second side region.
  • the 302 position corresponds.
  • the first pole core 10 may have a first tab 11 which may extend in a direction from the first side region 301 to the second side region 302, and the first tab 11 at least with the pole terminal 40 A portion is connected to achieve connection of the first pole core 10 to the pole terminal 40.
  • the second pole core 20 may have a second tab 21, the second tab 21 may extend in a direction from the second side region 302 to the first side region 301, and the second tab 21 at least with the pole terminal 40 A portion is connected to achieve connection of the second pole core 20 to the pole terminal 40.
  • first tab 11 may extend in a direction from the first side region 301 to the second side region 302, or may extend in a direction from the first side region 301 to the second side region 302. .
  • the second tab 21 may extend in a direction from the second side region 302 to the first side region 301, or may extend in a direction from the second side region 302 to the first side region 301, in other words, first.
  • At least a portion of the tab 11 may extend in a direction from the first side region 301 to the second side region 302, and at least a portion of the second tab 21 may extend in a direction from the second side region 302 to the first side region 301, This is within the protection scope of the present disclosure.
  • Lithium-ion battery tabs are composed of a multi-layered thin aluminum foil or copper foil laminate. Due to the thickness, size, shape of the tabs and the shape of the pole terminals on the cover plate, the tabs are difficult to directly cover.
  • the pole terminals of the board are connected together.
  • a connecting piece structure is usually added between the pole and the pole terminal on the cover plate, and one end of the connecting piece is first connected to the tab, and the other end of the connecting piece is connected to the cover.
  • the connection of the tabs connected by this connection to the cover requires a two-step welding process, the assembly process is complicated, and the internal resistance and other risks of the battery are increased due to the need for multiple soldering, thereby reducing the safety performance and service life of the battery.
  • the pole core of the battery and the cover plate can only be connected one by one, and then the assembled batteries are connected in parallel or in series to change the capacitance or voltage of the battery pack, the structure is complicated, and the battery pack has a large volume.
  • the first tab 11 and the second tab 21 can be connected not only to the post terminal 40 on the cover 30 via the connecting piece, but also directly to the post terminal 40 of the cover 30, in the battery.
  • the connection piece structure can be omitted, and the connection structure is simpler, which is advantageous for reducing the production cost.
  • the first tab 11 and the second tab 21 are directly connected to the pole terminal 40 to reduce the number of weldings, which is advantageous for simplifying the assembly process, can effectively reduce the internal resistance of the battery 100, and the battery 100 has better performance and is beneficial to ensure the battery. 100 safety and service life.
  • first tab 11 may extend in a direction from the first side region 301 to the second side region 302, and at least a portion of the second tab 21 may be along from the second side region 302 to the first side region 301
  • the direction of the extension extends, whereby the positions of the first pole core 10 and the second pole core 20 can be more compact, which is advantageous for reducing the volume of the battery 100, and the first tab 11 and the second tab 21 and the pole terminal 40 easy to connect.
  • the first tab 11 is connected to a portion or a larger area of the pole terminal 40
  • the second tab 21 is connected to another portion or a larger area of the pole terminal 40, that is, the first tab 11 and the second pole
  • the ear 21 can be connected to the same pole terminal 40, so that the first pole core 10 and the second pole core 20 can be connected in parallel or in series, which can increase the capacity or voltage of the battery 100 to meet more needs of use.
  • the first pole core 10 and the second pole core 20 of the battery 100 may be connected to the pole terminal 40, which can meet more requirements for use, is smaller in size, is more practical, and has the first tab. 11 and the second tab 21 can be directly connected to the pole terminal 40, the connection piece structure can be omitted, the connection structure is more firm, the assembly process is simpler, the production cost is lower, the internal resistance can be reduced, and the battery 100 is improved. Market Competitiveness.
  • the pole terminal 40 may include a plate body 402 and a columnar body 403.
  • the plate body 402 may be disposed on a surface of the cover plate 30 facing the first pole core 10 and the second pole core 20, and a portion of the plate body 402 may be located in the first side region 301, and the plate body 402 is Another portion may be located within the second side region 302.
  • the first tab 11 is connected to at least a portion of the plate-like body 402
  • the second tab 21 is connected to at least another portion of the plate-like body 402.
  • the columnar body 403 may be coupled to the plate-like body 402, and the columnar body 403 may protrude through the cover plate 30 to extend away from the surface of the cover plate 30 facing away from the first pole core 11 and the second pole core 21, thereby achieving the
  • the connection of one of the tabs 11 and the second tab 21 to the cover 30 facilitates the application of the battery 100 to other devices and to power other devices.
  • the plate-like body 402 and the columnar body 403 may be a single piece or a separate piece.
  • the plate body 402 and the columnar body 403 are separate members, as shown in FIG. 8, when assembled, the plate body 402 may be disposed on the first and second core cores 11 and 11 of the cover plate 30.
  • one end of the columnar body 403 passes through the cover plate 30 from the side of the cover plate 30 facing away from the first pole core 11 and the second pole core 21, and then one end of the columnar body 403 is connected to the plate body 402.
  • the connection method can be welding, snapping, and the like.
  • the first side region 301 and the second side region 302 may be arranged along the lateral direction of the cover plate 30, that is, along the width direction of the cover plate 30, and
  • the one side region 301 and the second side region 302 are demarcated by the transverse center line of the cover plate 30. It is understood that the lateral center line of the cover plate 30 is such that the cover plate 30 is halved in the longitudinal direction of the cover plate 30 and along the cover plate. The centerline of the lateral extension of 30.
  • the plate-like body 402 of the pole terminal 40 may constitute a platform structure, the plate-shaped body 402 may extend beyond one side surface of the cover plate 30, the surface of the plate-shaped body 402 is more flat, and the first tab 11 and the second tab 21 may be The end faces of one side surface of the plate-like body 402 are connected to ensure more convenient operation when the first tab 11 and the second tab 21 are connected to the end faces of the post terminals 40.
  • the plate-like body 402 of the pole terminal 40 may be evenly distributed in the first region 301 and the second region 302, that is, the center line in the width direction of the cover plate 30 may coincide with the center line of the pole terminal 40, so that the connection structure It can be symmetrically distributed, which is beneficial to improve the stability of the connection structure.
  • the method of connecting the pole terminal 40 to the first tab 11 and the second tab 21 is not particularly limited.
  • the pole terminal 40 may be respectively One of the tabs 11 and the second tab 21 are connected by laser welding, ultrasonic welding or riveting, etc., which are all within the protection scope of the present disclosure, and only need to satisfy the pole terminal 40 and the first tab 11 and the second tab 21 The requirement for a firm connection is sufficient.
  • the surfaces of the plate-like body 402 facing the first pole core 10 and the second pole core 20 may be configured to mount the plane 401, the first tab 11
  • the portion connected to the plate body 402 may be parallel to the mounting plane 401 and connected to the mounting plane 401.
  • the portion of the second tab 21 connected to the plate body 402 may be parallel to the mounting plane 401 and connected to the mounting plane 401, thereby
  • the plate-like body 402 of the column terminal 40 can be in surface contact with the first tab 11 and the second tab 21, and the connection area is larger, and the connection structure is more firm and reliable.
  • the first tab 11 and the second tab 21 may be bent.
  • the first tab 11 may include a first connecting portion 111, a first bent portion 112, and a first mounting portion 113.
  • the first connecting portion 111 may extend from the first pole core 10 away from the second pole core 20, the first bent portion 112 may be connected to the first connecting portion 111, and the first bent portion 112 is directed to the second pole.
  • the direction of the core 20 is bent, the first mounting portion 113 can be connected to the first bent portion 112, and the first mounting portion 113 extends toward the second pole core 20, and the first mounting portion 113 can be formed to be parallel to the mounting.
  • a portion of the plane 401 is attached to the mounting plane 401.
  • the first connecting portion 111 is connected to the first pole core 10
  • the first mounting portion 113 is connected to the mounting plane 401
  • the first connecting portion 111, the first bent portion 112 and the first mounting portion 113 are sequentially connected to each other.
  • the second tab 21 may include a second connecting portion 211, a second bent portion 212, and a second mounting portion 213.
  • the second connecting portion 211 may extend from the second pole core 20 in a direction away from the first pole core 10, the second bent portion 212 may be connected to the second connecting portion 211, and the second bent portion 212 is directed to the first pole
  • the direction of the core 10 is bent, the second mounting portion 213 can be connected to the second bent portion 212, and the second mounting portion 213 extends toward the first pole core 10, and the second mounting portion 213 can be formed to be parallel to the mounting.
  • a portion of the plane 401 is attached to the mounting plane 401.
  • the second connecting portion 211 is connected to the second pole core 20
  • the second mounting portion 213 is connected to the mounting plane 401
  • the second connecting portion 211, the second bent portion 212 and the second mounting portion 213 are sequentially connected to each other.
  • one end of the first tab 11 and one end of the second tab 21 may be first connected to the first pole core 10 and the second pole core 20, respectively.
  • the other end of the first tab 11 and the other end of the second tab 21 are connected to the post terminal 40, respectively.
  • the first tab 11 and the second tab 21 are finally bent, so that the first tab 11 forms the first connecting portion 111, the first bent portion 112, and the first mounting portion 113,
  • the second tab 21 forms a second connecting portion 211, a second bent portion 212 and a second mounting portion 213.
  • the first pole core 10 and the second pole core 20 can be connected together to make the battery 100 smaller in size.
  • the structure is more compact, and the connection between the first pole core 10 and the second pole core 20 is more convenient and quick.
  • the first tab 11 and the second tab 21 may be a single piece, that is, the first connecting portion 111 and the first bent portion 112.
  • the first mounting portion 211, the second connecting portion 211, and the second mounting portion 213 may be integrally formed, and the first tab 11 and the second tab 21 may be made of an aluminum/copper layer.
  • the integrated winding or lamination is formed to avoid the intermediate connection structure, which is advantageous for reducing the internal resistance of the battery 100, and does not require assembly, reduces the production steps, simplifies the processing steps, and is advantageous for reducing the production cost.
  • the portion of the first tab 11 that is connected to the pole terminal 40 and the portion of the second tab 21 that is connected to the pole terminal 40 can be flexibly set according to actual conditions, and can be spaced apart. Either set in one piece, or set up in opposition, or an overlapping area may be formed.
  • a portion of the first tab 11 that is connected to the post terminal 40 and a portion of the second tab 21 that is connected to the post terminal 40 may be The first tab 11 and the second tab 21 are respectively connected to the pole terminal 40 at intervals on both sides of the center line of the pole terminal 40.
  • the portion of the first tab 11 that is connected to the post terminal 40 and the portion of the second tab 21 that is connected to the post terminal 40 may be integrally formed.
  • the center line is located on the center line of the pole terminal 40, or the portion of the first tab 11 that is connected to the pole terminal 40 and the portion of the second tab 21 that is connected to the pole terminal 40 can be offset or can be understood as docking.
  • the connection is connected or docked, and the docking center line is located on the center line of the pole terminal 40.
  • the first tab 11 and the second tab 21 may be connected first and then connected to the post terminal 40.
  • a portion of the first tab 11 that is connected to the post terminal 40 and a portion of the second tab 21 that is connected to the post terminal 40 may be formed with Overlapping area.
  • the centerline of the pole terminal 40 can pass through the overlap region.
  • the embodiment in which the portion of the first tab 11 connected to the post terminal 40 and the portion of the second tab 21 connected to the post terminal 40 are respectively disposed in different manners can satisfy the first tab 11 and the second pole.
  • the requirement that the ear 21 and the pole terminal 40 are firmly connected is within the protection scope of the present disclosure.
  • a pre-soldering region 51 may be disposed on the first tab 11 and the second tab 21, and the post terminal 40 may be connected to the pre-welding region 51.
  • the connection of the first tab 11 and the second tab 21 to the post terminal 40 is more robust and reliable.
  • the first tab 11 and the second tab 21 are laminated by a plurality of layers of aluminum/copper foil, and then a protective sheet 50 is added, in the center of the protective sheet 50.
  • the plurality of foil layers are pre-welded together, and the weld zone at the center of the protective sheet 50 is the pre-solder zone 51.
  • the pre-welding can form the first tab 11 and the second tab 21 as a whole to facilitate the connection of the first tab 11 and the second tab 21 to the post terminal 40
  • the surface of the pre-soldering zone 51 of the one of the tabs 11 and the second tabs 21 is more flat, and when the post-terminals 40 are connected to the pre-welding zone 51, the connection can be made stronger and the operation is more convenient.
  • the pre-welding method may be laser welding, ultrasonic welding or the like
  • the protective sheet 50 may be an aluminum sheet or a copper sheet having a certain thickness, and only needs to satisfy the requirement that the multi-layer foil layer can be pre-welded into one whole.
  • the edge of the pole terminal 40 is not connected to the first tab 11 and the second tab 21, that is, the pole terminal 40 and the first
  • the connection area of the tab 11 and the second tab 21 is at a distance from the edge of the pole terminal 40, for example, the connection of the pole terminal 40 to the pre-bonding zone 51 on the first tab 11 and the second tab 21
  • the pre-welding zone 51 can be spaced from the edge of the pole terminal 40 to ensure that the pole terminal 40 is firmly connected to the first tab 11 and the second tab 21, and the edge of the connecting region is not easily cracked.
  • the first pole core 10 may include two first tabs 11, and the two first tabs 11 are a first positive tab 12 and a first negative pole, respectively.
  • the ear 13 the second pole core 20 may include two second tabs 21, and the second second tabs 21 are a second positive tab 22 and a second negative tab 23, respectively.
  • the first positive electrode tab 12 and the first negative electrode tab 13 may be spaced apart along the length direction of the first pole core 10, that is, the length direction of the cover plate 30, and the second positive electrode tab 22 and the second negative electrode tab 23 may be along the second The longitudinal direction of the pole core 20, that is, the longitudinal direction of the cover plate 30, is spaced apart.
  • the pole terminal 40 may include a positive pole terminal 41 and a negative pole terminal 42.
  • the first positive electrode tab 12 and the second positive electrode tab 22 may be coupled to the positive electrode post terminal 41, and the first negative electrode tab 13 and the second negative electrode tab 23 may be coupled to the negative electrode post terminal 42. Therefore, not only the positive electrode tab for connecting the positive electrode tab and the positive electrode post terminal in the related art can be omitted, but also the negative electrode connecting piece for connecting the negative electrode tab and the negative electrode post terminal in the related art can be omitted, which is advantageous for further The assembly process is simplified, the production cost is reduced, and the internal resistance of the battery 100 is lowered.
  • the portion of the first positive electrode tab 12 that is connected to the pole terminal 40 and the portion of the second positive electrode tab 22 that is connected to the pole terminal 40 are disposed with the first negative electrode tab 13 .
  • the portion connected to the pole terminal 40 and the portion of the second negative electrode tab 23 connected to the pole terminal 40 may be the same or different, that is, the pole terminal of the first positive electrode 12 of the battery 100
  • the portion of the 40 connected portion and the portion of the second positive electrode 22 that is connected to the pole terminal 40 is disposed in such a manner as to be connected to the portion of the first negative electrode tab 13 that is connected to the pole terminal 40 and to the pole terminal 40 of the second negative electrode tab 23.
  • the setting of the part may be one or two of an integral setting, an interval setting, a matching setting or an overlapping setting.
  • the portion of the first positive electrode 12 that is connected to the pole terminal 40 and the portion of the second positive electrode 22 that is connected to the pole terminal 40 may be spaced apart from each other.
  • a portion of the first negative electrode tab 13 connected to the pole terminal 40 and a portion of the second negative electrode tab 23 connected to the pole terminal 40 may be integrally provided and the center line is located at the center line of the pole terminal 40. on.
  • the battery 100 is not limited to including the first pole core 10 and the second pole core 20, and may further include more pole cores, and the adjacent two pole cores may constitute a pair, and the plurality of pole cores At least one pair of pole cores may be included, and the two tabs of each pair of pole cores may be connected to each other, and the two tabs connected to each other may be connected to the pole terminal 40.
  • a plurality of pole cores may be firstly coupled into a plurality of pairs of pole cores, and then the poles of the plurality of pairs of pole cores are pre-connected, and finally the pre-connected tabs and pole terminals are connected. 40 is directly connected to realize connection of a plurality of pole cores, and the connection structure of the plurality of pole cores and the pole terminal 40 is simpler.
  • the battery 100 may be a lithium ion battery or the like, which is all within the protection scope of the present disclosure.
  • the battery 100 according to one embodiment of the present disclosure will be described in detail below with reference to the accompanying drawings. It is to be understood that the following description is only illustrative, and is not to be construed as limiting.
  • the battery 100 includes a first pole core 10, a second pole core 20, a first positive pole 12, a second positive ear 22, a first negative ear 13, a second negative ear 23, and a cover plate. 30 and protective sheet 50.
  • the positive electrode post terminal 41 and the negative electrode post terminal 42 are provided at both ends of the cover plate 30 in the longitudinal direction.
  • the assembly process of the battery 100 is as follows:
  • the first positive electrode tab 12 and the second positive electrode tab 22 are respectively laminated by a plurality of layers of aluminum foil, and the first negative electrode tab 13 and the second negative electrode tab 23 are respectively laminated by a plurality of layers of copper foil.
  • a protective sheet 50 is respectively added to the first positive electrode 12, the second positive electrode 22, the first negative electrode 13 and the second negative electrode 23 to center the left and right positions of the protective sheet 50, and the first positive electrode 12 and the second
  • the positive electrode tab 22, the first negative electrode tab 13 and the second negative electrode tab 23 are pre-welded by ultrasonic welding, respectively, and the ultrasonically welded pre-soldering zone 51 is located at the center of the protective sheet 50, as shown in FIG.
  • the plate-like body 402 of the pole terminal 40 is a platform structure, the platform is slightly higher than one side surface of the cover plate 30, and the pre-welded first pole core 10 and the second pole core 20 are covered along the cover.
  • the width direction of the plate 30 is respectively located at two sides of the cover plate 30, the first positive electrode tab 12 and the first negative electrode tab 13 are distributed along the length direction of the cover plate 30, and the second positive electrode tab 22 and the second negative electrode tab 23 are also along the cover plate 30. The length direction distribution.
  • the first positive electrode tab 12 and the second positive electrode tab 22 are aligned along the longitudinal direction of the cover plate 30, and the first negative electrode tab 13 and the second negative electrode tab 23 are aligned along the longitudinal direction of the cover plate 30, and the protection sheet 50 is spaced from the pole terminal 40.
  • the edge of the platform is at a certain distance.
  • the first positive electrode tab 12 and the second positive electrode tab 22 are spaced apart from each other on both sides of the center line of the plate-like body 402 of the positive electrode post terminal 41.
  • the first negative electrode tab 13 and the second negative electrode tab 23 are spaced apart from each other by a certain distance. Both sides of the center line of the plate-like body 402 of the column terminal 42.
  • the pre-welded first tab 11 and the second tab 21 are directly connected to the plate-like body 402 of the post terminal 40 on the cap plate 30 by laser welding, and the position of the laser welding is in the ultrasonic pre-welded pre-soldering zone 51. In this way, the connection between the first tab 11 and the second tab 21 and the cover 30 is ensured to be firm.
  • the first tab 11 and the second tab 21 are bent, and the first pole core 10 and the second pole core 20 are combined to form the battery 100. As shown in FIG. 3, the battery 100 is assembled.
  • a battery pack according to an embodiment of the present disclosure includes a battery 100 according to an embodiment of the present disclosure. Since the battery 100 according to an embodiment of the present disclosure has the above-described advantageous technical effects, the battery pack according to the embodiment of the present disclosure also has a corresponding technical effect, can satisfy more use requirements, is smaller in size, and is more practical, and The connection piece structure can be omitted, the connection structure is firmer, the assembly process is simpler, the production cost is lower, and the internal resistance can be reduced, which is advantageous for improving market competitiveness.
  • An electric car according to an embodiment of the present disclosure includes a battery pack according to an embodiment of the present disclosure. Since the battery pack according to the embodiment of the present disclosure has the above-described advantageous technical effects, the electric vehicle according to the embodiment of the present disclosure also has a corresponding technical effect, can satisfy more use requirements, is smaller in size, and is more practical, and The connection piece structure can be omitted, the connection structure is firmer, the assembly process is simpler, the production cost is lower, and the internal resistance can be reduced, which is advantageous for improving market competitiveness.
  • connection In the description of the present disclosure, it should be noted that the terms “installation”, “connected”, and “connected” are to be understood broadly, and may be fixed or detachable, for example, unless otherwise explicitly defined and defined. Connected, or integrally connected; can be mechanical or electrical; can be directly connected, or indirectly connected through an intermediate medium, can be the internal communication of the two components.
  • Connected, or integrally connected can be mechanical or electrical; can be directly connected, or indirectly connected through an intermediate medium, can be the internal communication of the two components.
  • the specific meanings of the above terms in the present disclosure can be understood in the specific circumstances by those skilled in the art.
  • the description of the terms “embodiment”, “detailed embodiment”, “example” and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or examples are included in at least the present disclosure. In one embodiment or example. In the present specification, the schematic representation of the above terms does not necessarily mean the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples without interference or contradiction.

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Abstract

一种电池(100)和具有其的电池包、电动汽车，电池(100)包括：壳体；位于壳体的端部的盖板(30)；盖板(30)具有沿其横向或纵向排列的第一侧区域(301)和第二侧区域(302)；设于盖板(30)的极柱端子(40)，极柱端子(40)的一部分位于第一侧区域(301)且另一部分位于第二侧区域(302)；位于壳体内的第一极芯(10)和第二极芯(20)，第一极芯(10)与第一侧区域(301)位置对应，第一极芯(10)具有第一极耳(11)，第一极耳(11)的至少一部分沿从第一侧区域(301)至第二侧区域(302)的方向延伸且至少与极柱端子(40)的一部分相连，第二极芯(20)与第二侧区域(301)位置对应，第二极芯(20)具有第二极耳(21)，第二极耳(21)的至少一部分沿从第二侧区域(302)至第一侧区域(301)的方向延伸且至少与极柱端子(40)的另一部分相连。

Description

电池和具有其的电池包、电动汽车
相关申请的交叉引用
本申请基于申请号为201721749700.6，申请日为2017年12月14日的中国专利申请提出，并要求该中国专利申请的优先权，该中国专利申请的全部内容在此引入本申请作为参考。
技术领域
本公开涉及电动汽车技术领域，涉及一种电池和具有其的电池包、电动汽车。
背景技术
锂离子电池极耳包括正极极耳和负极极耳，正极极耳和负极极耳是由多层很薄的铜箔或铝箔层叠组成的。在相关技术中，极耳与盖板的极柱端子之间通常是添加一个连接片结构，连接片的一端先与极耳连接，连接片的另一端再与盖板连接。正极极耳与正极连接片连接，负极极耳与负极连接片连接，正极连接片再与盖板上对应的正极极柱端子连接，负极连接片再与盖板上对应的负极极柱端子连接。而通过这种连接方式连接的极耳连接到盖板需要两步焊接工艺，由此，装配工艺比较复杂，并且由于多次焊接会增加电池的内阻及其他风险。此外，电池的极芯与盖板只能一一对应的连接，再将组装好的电池进行并联或者串联，以改变电池组的电容或者电压，结构复杂，电池组体积较大。
实用新型内容
本公开旨在至少解决现有技术中存在的技术问题之一。为此，本公开提出一种电池，所述电池装配工艺更加简单，能够满足更多的使用要求。
本公开还提出了一种具有上述电池的电池包。
本公开还提出了一种具有上述电池包的电动汽车。
根据本公开实施例的电池，包括：壳体；盖板，所述盖板位于所述壳体的端部；所述盖板具有沿其横向或纵向排列的第一侧区域和第二侧区域；极柱端子，所述极柱端子设于所述盖板，所述极柱端子的一部分位于所述第一侧区域且另一部分位于所述第二侧区域；第一极芯，所述第一极芯位于所述壳体内，所述第一极芯与所述第一侧区域位置对应，所述第一极芯具有第一极耳，所述第一极耳的至少一部分沿从所述第一侧区域至所述第二侧区域的方向延伸且至少与所述极柱端子的一部分相连；第二极芯，所述第二极芯位于所述壳体内，所述第二极芯与所述第二侧区域位置对应，所述第二极芯具有第二极耳，所述第 二极耳的至少一部分沿从所述第二侧区域至所述第一侧区域的方向延伸且至少与所述极柱端子的所述另一部分相连。
根据本公开实施例的电池能够满足更多的使用要求，体积更小，实用性更强，且可以省去连接片结构，连接结构更加牢固，装配工艺更加简单，生产成本更低，且可以降低内阻，有利于提高电池的市场竞争力。
另外，根据本公开上述实施例的电池还可以具有如下附加的技术特征：
根据本公开实施例的电池，所述极柱端子包括：板状体，所述板状体设于所述盖板的朝向所述第一极芯和所述第二极芯的表面，所述板状体的一部分位于所述第一侧区域内且另一部分位于所述第二侧区域内，所述第一极耳至少与所述板状体的所述一部分相连且所述第二极耳至少与所述板状体的所述另一部分相连；柱状体，所述柱状体连接在所述板状体上且穿过所述盖板而伸出所述盖板的背向所述第一极芯和所述第二极芯的表面。
本公开的一些实施例中，所述第一侧区域和所述第二侧区域沿所述盖板的横向排列且以所述盖板的横向中心线为分界，所述板状体平均分布在所述第一侧区域和所述第二侧区域内。
在本公开的一些实施例中，所述板状体的朝向所述第一极芯和所述第二极芯的表面构造成安装平面，所述第一极耳的所述至少一部分平行于所述安装平面且连接在所述安装平面上，所述第二极耳的所述至少一部分平行于所述安装平面且连接在所述安装平面上。
本公开的一些实施例中，所述第一极耳包括：第一连接部，所述第一连接部从所述第一极芯向远离所述第二极芯的方向延伸；第一折弯部，所述第一折弯部连接在所述第一连接部上且向所述第二极芯的方向折弯；第一安装部，所述第一安装部连接在所述第一折弯部上且向所述第二极芯的方向延伸，所述第一安装部平行于所述安装平面且连接在所述安装平面上。
本公开的一些实施例中，所述第二极耳包括：第二连接部，所述第二连接部从所述第二极芯向远离所述第一极芯的方向延伸；第二折弯部，所述第二折弯部连接在所述第二连接部上且向所述第一极芯的方向折弯；第二安装部，所述第二安装部连接在所述第二折弯部上且向所述第一极芯的方向延伸，所述第二安装部平行于所述安装平面且连接在所述安装平面上。
本公开的一些实施例中，所述第一极耳的所述至少一部分与所述第二极耳的所述至少一部分一体设置、间隔设置、相抵设置或重叠设置。
本公开的一些实施例中，所述第一极耳的所述至少一部分与所述极柱端子通过激光焊接、超声波焊接和铆接中的任意一种方式连接。
本公开的一些实施例中，所述第二极耳的所述至少一部分与所述极柱端子通过激光焊 接、超声波焊接和铆接中的任意一种方式连接。
根据本公开的一些实施例，所述第一极芯具有沿其长度方向间隔设置的两个所述第一极耳且分别为第一正极耳和第一负极耳，所述第二极芯具有沿其长度方向间隔设置的两个所述第二极耳且分别为第二正极耳和第二负极耳，所述极柱端子为两个且分别为正极柱端子和负极柱端子，所述第一正极耳和第二正极耳连接在所述正极柱端子上，所述第一负极耳和所述第二负极耳连接在所述负极柱端子上。
根据本公开实施例的电池包包括根据本公开实施例的电池。
根据本公开实施例的电动汽车包括根据本公开实施例的电池包。
本公开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，或通过本公开的实践了解到。
附图说明
本公开的上述和/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是根据本公开实施例的电池的一个状态的连接结构示意图；
图2是根据本公开实施例的电池的另一个状态的连接结构示意图；
图3是根据本公开一个实施例的电池的结构示意图；
图4是根据本公开另一个实施例的电池的结构示意图；
图5是根据本公开又一个实施例的电池的结构示意图；
图6是根据本公开实施例的电池的盖板和极柱端子的连接结构示意图。
附图标记：
电池100；
第一极芯10；第一极耳11；第一连接部111；第一折弯部112；第一安装部113；第一正极耳12；第一负极耳13；
第二极芯20；第二极耳21；第二连接部211；第二折弯部212；第二安装部213；第二正极耳22；第二负极耳23；
盖板30；第一侧区域301；第二侧区域302；
极柱端子40；安装平面401；板状体402；柱状体403；正极柱端子41；负极柱端子42；
保护片50；预焊区51。
具体实施方式
下面详细描述本公开的实施例，所述实施例的示例在附图中示出。下面通过参考附图描述的实施例是示例性的，旨在用于解释本公开，而不能理解为对本公开的限制，本领域的普通技术人员在不脱离本公开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，本公开的范围由权利要求及其等同物限定。
在本公开的描述中，需要理解的是，术语“长度”、“宽度”、“厚度”、“上”、“下”、“前”、“后”、“左”、“右”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公开和简化描述，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公开的限制。
下面参考图1-图6描述根据本公开实施例的电池100。
参照图1-图6所示，根据本公开实施例的电池100可以包括：壳体(图中未示出)、盖板30、极柱端子40、第一极芯10和第二极芯20。
本公开的一些实施例中，盖板30可以位于壳体的端部，且盖板30具有第一侧区域301和第二侧区域302，第一侧区域301和第二侧区域302可以沿盖板30的横向排列，也可以沿盖板30的纵向排列。这里，盖板30的横向可以理解为如图2中所示的前后方向，也就是盖板30的宽度方向，盖板30的纵向可以理解为如图2中所示的左右方向，也就是盖板30的长度方向。
极柱端子40可以设在盖板30上，极柱端子40的一部分可以位于第一侧区域301，且极柱端子40的另一部分可以位于第二侧区域302，也就是说，极柱端子40跨设在盖板30的第一侧区域301和第二侧区域302。
本领域的技术人员可以理解地是，第一侧区域301和第二侧区域302均为空间区域，换言之，盖板30的一部分称之为第一侧区域301，盖板30的另一部分称之为第二侧区域302。
第一极芯10和第二极芯20可以位于壳体内，其中，如图3所示，第一极芯10可以与第一侧区域301位置对应，第二极芯20可以与第二侧区域302位置对应。此外，第一极芯10可以具有第一极耳11，第一极耳11可以沿从第一侧区域301至第二侧区域302的方向延伸，且第一极耳11至少与极柱端子40的一部分相连，以实现第一极芯10与极柱端子40的连接。第二极芯20可以具有第二极耳21，第二极耳21可以沿从第二侧区域302至第一侧区域301的方向延伸，且第二极耳21至少与极柱端子40的另一部分相连，以实现第二极芯20与极柱端子40的连接。
需要说明的是，第一极耳11可以是一部分沿从第一侧区域301至第二侧区域302的方向延伸，也可以是整体沿从第一侧区域301至第二侧区域302的方向延伸。第二极耳21可以是一部分沿从第二侧区域302至第一侧区域301的方向延伸，也可以是整体沿从第二侧 区域302至第一侧区域301的方向延伸，换言之，第一极耳11的至少一部分可以沿从第一侧区域301至第二侧区域302的方向延伸，第二极耳21的至少一部分可以沿从第二侧区域302至第一侧区域301的方向延伸，这都在本公开的保护范围之内。
锂离子电池极耳是由多层很薄的铝箔或铜箔层叠组成的，受极耳厚度、大小、形状以及盖板上的极柱端子的形状等因素的影响，极耳很难直接与盖板对应的极柱端子连接在一起。在相关技术中，极耳与盖板上的极柱端子之间通常是添加一个连接片结构，连接片的一端先与极耳连接，连接片的另一端再与盖板连接。而通过这种连接方式连接的极耳连接到盖板需要两步焊接工艺，装配工艺比较复杂，并且由于需要多次焊接会增加电池的内阻及其他风险，降低电池的安全性能和使用寿命。此外，电池的极芯与盖板只能一一对应的连接，再将组装好的电池进行并联或者串联，以改变电池组的电容或者电压，结构复杂，电池组体积较大。
而在本公开中，第一极耳11和第二极耳21不仅可以通过连接片与盖板30上的极柱端子40相连，还可以与盖板30上极柱端子40直接相连，在电池100的组装过程中，可以省去连接片结构，连接结构更加简单，有利于降低生产成本。且第一极耳11和第二极耳21与极柱端子40直接相连可以减少焊接次数，有利于简化装配工艺，可以有效降低电池100的内阻，电池100性能更好，且有利于保证电池100的安全性和使用寿命。
此外，第一极耳11的至少一部分可以沿从第一侧区域301至第二侧区域302的方向延伸，第二极耳21的至少一部分可以沿从第二侧区域302至第一侧区域301的方向延伸，由此，第一极芯10和第二极芯20的设置位置可以更紧凑，有利于减小电池100的体积，且第一极耳11和第二极耳21与极柱端子40连接方便。
第一极耳11与极柱端子40的一部分或者更大面积相连，第二极耳21与极柱端子40的另一部分或者更大面积相连，也就是说，第一极耳11和第二极耳21可以连接在同一个极柱端子40，使第一极芯10和第二极芯20可以并联或者串联，可以增大电池100的容量或者电压，以满足更多的使用需求。
根据本公开实施例的电池100的第一极芯10和第二极芯20可以与极柱端子40相连，能够满足更多的使用要求，体积更小，实用性更强，且第一极耳11和第二极耳21可以与极柱端子40直接相连，可以省去连接片结构，连接结构更加牢固，装配工艺更加简单，生产成本更低，且可以降低内阻，有利于提高电池100的市场竞争力。
根据本公开实施例的电池100，如图3和图6所示，极柱端子40可以包括板状体402和柱状体403。
具体地，板状体402可以设于盖板30的朝向第一极芯10和第二极芯20的表面，板状体402的一部分可以位于第一侧区域301内，且板状体402的另一部分可以位于第二侧区 域302内。第一极耳11至少与板状体402的一部分相连，且第二极耳21至少与板状体402的另一部分相连。由此，实现第一极耳11和第二极耳21与极柱端子40的连接，第一极耳11和第二极耳21与极柱端子40连接结构简单方便。
柱状体403可以连接在板状体402上，且柱状体403可以穿过盖板30而伸出盖板30的背向第一极芯11和第二极芯21的表面，由此，实现第一极耳11和第二极耳21与盖板30的连接，且便于电池100应用于其他装置并向其他装置供电。
本公开的一些实施例中，在本公开中，板状体402与柱状体403可以为一体件，也可以为分体件。在板状体402与柱状体403为分体件的实施例中，如图8所示，组装时，可以将板状体402设置在盖板30的朝向第一极芯11和第二极芯21的一侧，柱状体403的一端从盖板30的背向第一极芯11和第二极芯21的一侧穿过盖板30，然后将柱状体403的一端与板状体402连接，连接方式可以为焊接、卡接等。
本公开的一些实施例中，如图2和图3所示，第一侧区域301和第二侧区域302可以沿盖板30的横向排列，也就是沿盖板30的宽度方向排列，且第一侧区域301和第二侧区域302以盖板30的横向中心线为分界，可以理解地是，盖板30的横向中心线为，在盖板30的纵向上平分盖板30且沿盖板30的横向延伸的中心线。极柱端子40的板状体402可以构成平台结构，板状体402可以超出盖板30的一侧表面，板状体402的表面更加平整，第一极耳11和第二极耳21可以与板状体402的一侧表面的端面相连，保证第一极耳11和第二极耳21与极柱端子40的端面连接时操作更加方便。
此外，极柱端子40的板状体402可以平均分布在第一区域301和第二区域302，也就是说，盖板30的宽度方向的中线可以与极柱端子40的中线重合，使连接结构可以对称分布，有利于提高连接结构的稳定性。
根据本公开实施例的电池100，极柱端子40分别与第一极耳11和第二极耳21的连接方法不做特殊限制，本公开的一些实施例中，极柱端子40可以分别与第一极耳11和第二极耳21激光焊接、超声波焊接或铆接等相连，这都在本公开的保护范围之内，只需要满足极柱端子40与第一极耳11和第二极耳21牢固连接的要求即可。
在本公开的一些实施例中，如图3和图4所示，板状体402的朝向第一极芯10和第二极芯20的表面可以构造成安装平面401，第一极耳11的与板状体402相连部分可以平行于安装平面401并与安装平面401相连，第二极耳21的与板状体402相连部分可以平行于安装平面401并与安装平面401相连，由此，极柱端子40的板状体402与第一极耳11和第二极耳21可以面面接触相连，连接面积更大，连接结构更加牢固可靠。
在本公开的一些实施例中，如图3和图4所示，第一极耳11和第二极耳21可以弯折设置。
第一极耳11可以包括：第一连接部111、第一折弯部112和第一安装部113。第一连接部111可以从第一极芯10向远离第二极芯20的方向延伸，第一折弯部112可以连接在第一连接部111上，且第一折弯部112向第二极芯20的方向折弯，第一安装部113可以连接在第一折弯部112上，且第一安装部113向第二极芯20的方向延伸，第一安装部113可以形成为平行于安装平面401的部分连接在安装平面401上。也就是说，第一连接部111与第一极芯10相连，第一安装部113与安装平面401相连，第一连接部111、第一折弯部112和第一安装部113依次相连，实现第一极芯10和极柱端子40的连接。
第二极耳21可以包括：第二连接部211、第二折弯部212和第二安装部213。第二连接部211可以从第二极芯20向远离第一极芯10的方向延伸，第二折弯部212可以连接在第二连接部211上，且第二折弯部212向第一极芯10的方向折弯，第二安装部213可以连接在第二折弯部212上，且第二安装部213向第一极芯10的方向延伸，第二安装部213可以形成为平行于安装平面401的部分连接在安装平面401上。也就是说，第二连接部211与第二极芯20相连，第二安装部213与安装平面401相连，第二连接部211、第二折弯部212和第二安装部213依次相连，实现第二极芯20和极柱端子40的连接。
在制造过程中，如图1所示，可以先将第一极耳11的一端和第二极耳21的一端分别与第一极芯10和第二极芯20相连。如图2所示，再将第一极耳11的另一端和第二极耳21的另一端分别与极柱端子40相连。如图3所示，最后将第一极耳11和第二极耳21进行弯折，使第一极耳11形成第一连接部111、第一折弯部112和第一安装部113，第二极耳21形成第二连接部211、第二折弯部212和第二安装部213，此时，第一极芯10和第二极芯20可以连接在一起，使电池100的体积更小，结构更加紧凑，第一极芯10与第二极芯20连接更加方便快捷。
本公开的一些实施例中，如图3和图4所示，第一极耳11和第二极耳21可以分别为一体件，也就是说，第一连接部111、第一折弯部112和第一安装部113可以一体形成，第二连接部211、第二折弯部212和第二安装部213可以一体形成，第一极耳11和第二极耳21可以由铝/铜箔层一体卷绕或者层叠形成，避免中间连接结构，有利于减少电池100的内阻，且无需进行组装，减少了生产步骤，简化了加工工序，有利于降低生产成本。
在本公开中，第一极耳11的与极柱端子40相连的部分和第二极耳21的与极柱端子40相连的部分的设置方式可以根据实际情况需要灵活设置，可以间隔开设置，或者一体设置，或者相抵设置，再或者可形成有重叠区域。
例如，如图2和图3所示，在本公开的一些实施例中，第一极耳11的与极柱端子40相连的部分和第二极耳21的与极柱端子40相连的部分可以间隔开设置在极柱端子40的中线的两侧，可以将第一极耳11和第二极耳21分别与极柱端子40相连。
例如，在本公开的另一些实施例，如图4所示，第一极耳11的与极柱端子40相连的部分和第二极耳21的与极柱端子40相连的部分可以一体形成，且中线位于极柱端子40的中线上，或者第一极耳11的与极柱端子40相连的部分和第二极耳21的与极柱端子40相连的部分可以相抵设置，也可以理解为对接设置或者对接相连，对接中线位于极柱端子40的中线上。此时，可以先将第一极耳11和第二极耳21相连，再与极柱端子40连接。
例如，在本公开的又一些实施例中，如图5所示，第一极耳11的与极柱端子40相连的部分和第二极耳21的与极柱端子40相连的部分可以形成有重叠区域。本公开的一些实施例中，极柱端子40的中线可以穿过重叠区域。
上述第一极耳11的与极柱端子40相连的部分和第二极耳21的与极柱端子40相连的部分分别采用不同方式设置的实施例均可以满足第一极耳11和第二极耳21与极柱端子40稳固相连的要求，都在本公开的保护范围之内。
根据本公开的一些实施例，如图1和图2所示，第一极耳11和第二极耳21上可以设有预焊区51，极柱端子40可以与预焊区51相连，使第一极耳11和第二极耳21与极柱端子40连接更加牢固可靠。
需要说明的是，如图1中具体实施例所示，第一极耳11和第二极耳21是由多层铝/铜箔层叠在一起，然后添加保护片50，在保护片50的中央将多层箔层预焊在一起，上述保护片50的中央的焊接区即为预焊区51。一方面，预焊可以使第一极耳11和第二极耳21分别形成为一个整体，以便于第一极耳11和第二极耳21与极柱端子40的连接，另一方面，第一极耳11和第二极耳21的预焊区51的表面更加平整，在极柱端子40与预焊区51相连时，可以使连接更加牢固，且操作更加方便。
这里，预焊的方法可以为激光焊、超声波焊等方法，保护片50可以为具有一定厚度的铝片或者铜片，只需要满足可以使多层箔层预焊形成为一个整体的要求即可。
在本公开的一些实施例中，如图2和图3所示，极柱端子40的边沿不与第一极耳11和第二极耳21连接，也就是说，极柱端子40与第一极耳11和第二极耳21的连接区域距离极柱端子40的边沿一定距离，例如，在极柱端子40与第一极耳11和第二极耳21上的预焊区51相连的实施例中，预焊区51可以距离极柱端子40的边沿一定距离，可以保证极柱端子40与第一极耳11和第二极耳21连接牢固，且连接区域边沿不易开裂。
根据本公开的一些实施例，如图1和图2所示，第一极芯10可以包括两个第一极耳11，两个第一极耳11分别为第一正极耳12和第一负极耳13，第二极芯20可以包括两个第二极耳21，两个第二极耳21分别为第二正极耳22和第二负极耳23。第一正极耳12和第一负极耳13可以沿第一极芯10的长度方向，也就是盖板30的长度方向，间隔开设置，第二正极耳22和第二负极耳23可以沿第二极芯20的长度方向，也就是盖板30的长度方向， 间隔开设置。
极柱端子40可以包括正极柱端子41和负极柱端子42。第一正极耳12和第二正极耳22可以与正极柱端子41连接，第一负极耳13和第二负极耳23可以与负极柱端子42连接。由此，不仅可以省去相关技术中用于连接正极极耳与正极柱端子的正极连接片，而且可以省去相关技术中用于连接负极极耳与负极柱端子的负极连接片，有利于进一步简化装配工艺，降低生产成本，降低电池100的内阻。
此外，需要说明的是，在本公开中，第一正极耳12的与极柱端子40相连的部分和第二正极耳22的与极柱端子40相连的部分的设置方式与第一负极耳13的与极柱端子40相连的部分和第二负极耳23的与极柱端子40相连的部分的设置方式可以相同也可以不同，也就是说，电池100的第一正极耳12的与极柱端子40相连的部分和第二正极耳22的与极柱端子40相连的部分的设置方式与第一负极耳13的与极柱端子40相连的部分和第二负极耳23的与极柱端子40相连的部分的设置方式可以为一体设置、间隔设置、相抵设置或重叠设置中的一种或者两种。
例如，在本公开的一些未示出的实施例中，第一正极耳12的与极柱端子40相连的部分和第二正极耳22的与极柱端子40相连的部分可以间隔开设置在极柱端子40的中线的两侧，第一负极耳13的与极柱端子40相连的部分和第二负极耳23的与极柱端子40相连的部分可以一体设置且中线位于极柱端子40的中线上。
根据本公开进一步的实施例的电池100的不限于包括第一极芯10和第二极芯20，还可以包括更多个极芯，相邻两个极芯可以构成一对，多个极芯可以包括至少一对极芯，每对极芯的两个极耳可以彼此相连，且彼此相连的两个极耳可以与极柱端子40相连。在电池100的制造过程中，可以先将多个极芯两两配合的连接成多对极芯，然后将多对极芯的极耳预先连接，最后再将预先连接的极耳与极柱端子40直接连接以实现多个极芯的连接，多个极芯与极柱端子40的连接结构更加简单。
本公开的一些实施例中，根据本公开实施例的电池100可以为锂离子电池等，这都在本公开的保护范围之内。
下面参考附图详细描述根据本公开的一个具体实施例的电池100，值得理解的是，下述描述只是示例性说明，而不能理解为对实用新型的限制。
如图1-图3所示，电池100包括第一极芯10、第二极芯20、第一正极耳12、第二正极耳22、第一负极耳13、第二负极耳23、盖板30和保护片50。其中，盖板30的长度方向的两端设有正极柱端子41和负极柱端子42。
电池100的装配过程如下：
首先，通过卷绕或者层叠后第一正极耳12和第二正极耳22分别是由多层铝箔层 叠在一起，第一负极耳13和第二负极耳23分别是由多层铜箔层叠在一起，在第一正极耳12、第二正极耳22、第一负极耳13和第二负极耳23上分别添加保护片50，使保护片50的左右位置居中，将第一正极耳12、第二正极耳22、第一负极耳13和第二负极耳23分别通过超声波焊接预焊为一体，超声波焊接的预焊区51位于保护片50的中央，如图1所示。
如图2所示，极柱端子40的板状体402为一个平台结构，该平台略高于盖板30的一侧表面，预焊后的第一极芯10和第二极芯20沿盖板30的宽度方向分别位于盖板30的两侧，第一正极耳12和第一负极耳13沿盖板30的长度方向分布，第二正极耳22和第二负极耳23也沿盖板30的长度方向分布。第一正极耳12和第二正极耳22沿盖板30的长度方向中线对齐，第一负极耳13和第二负极耳23沿盖板30的长度方向中线对齐，保护片50距离极柱端子40的平台边沿一定距离。
第一正极耳12和第二正极耳22间隔开一定距离设在正极柱端子41的板状体402的中线的两侧，第一负极耳13和第二负极耳23间隔开一定距离设在负极柱端子42的板状体402的中线的两侧。预焊后的第一极耳11和第二极耳21通过激光焊直接连接到盖板30上的极柱端子40的板状体402上，激光焊的位置在超声波预焊的预焊区51上，以此保证第一极耳11和第二极耳21与盖板30的连接牢固。
随后，将第一极耳11和第二极耳21弯折，使第一极芯10和第二极芯20组合在一起形成电池100，如图3所示，电池100装配完成。
根据本公开实施例的电池包包括根据本公开实施例的电池100。由于根据本公开实施例的电池100具有上述有益的技术效果，因此根据本公开实施例的电池包也具有相应的技术效果，能够满足更多的使用要求，体积更小，实用性更强，且可以省去连接片结构，连接结构更加牢固，装配工艺更加简单，生产成本更低，且可以降低内阻，有利于提高市场竞争力。
根据本公开实施例的电动汽车包括根据本公开实施例的电池包。由于根据本公开实施例的电池包具有上述有益的技术效果，因此根据本公开实施例的电动汽车也具有相应的技术效果，能够满足更多的使用要求，体积更小，实用性更强，且可以省去连接片结构，连接结构更加牢固，装配工艺更加简单，生产成本更低，且可以降低内阻，有利于提高市场竞争力。
根据本公开实施例的电池100、电池包和电动汽车的其他构成以及操作对于本领域的普通技术人员来说是可知的，在此不再详细描述。
在本公开的描述中，需要说明的是，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或一体地 连接；可以是机械连接，也可以是电连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通。对于本领域的普通技术人员而言，可以具体情况理解上述术语在本公开中的具体含义。
在本说明书的描述中，参考术语“实施例”、“具体实施例”、“示例”等的描述意指结合该实施例或示例描述的具体特征、结构、材料或者特点包含于本公开的至少一个实施例或示例中。在本说明书中，对上述术语的示意性表述不一定指的是相同的实施例或示例。而且，描述的具体特征、结构、材料或者特点可以在任何的一个或多个实施例或示例中在不干涉、不矛盾的情况下均可以以合适的方式相互结合。

Claims (12)

  1. 一种电池，其特征在于，包括：
    壳体；
    盖板，所述盖板位于所述壳体的端部；所述盖板具有沿其横向或纵向排列的第一侧区域和第二侧区域；
    极柱端子，所述极柱端子设于所述盖板，所述极柱端子的一部分位于所述第一侧区域且另一部分位于所述第二侧区域；
    第一极芯，所述第一极芯位于所述壳体内，所述第一极芯与所述第一侧区域位置对应，所述第一极芯具有第一极耳，所述第一极耳的至少一部分沿从所述第一侧区域至所述第二侧区域的方向延伸且至少与所述极柱端子的一部分相连；
    第二极芯，所述第二极芯位于所述壳体内，所述第二极芯与所述第二侧区域位置对应，所述第二极芯具有第二极耳，所述第二极耳的至少一部分沿从所述第二侧区域至所述第一侧区域的方向延伸且至少与所述极柱端子的所述另一部分相连。
  2. 根据权利要求1所述的电池，其特征在于，所述极柱端子包括：
    板状体，所述板状体设于所述盖板的朝向所述第一极芯和所述第二极芯的表面，所述板状体的一部分位于所述第一侧区域内且另一部分位于所述第二侧区域内，所述第一极耳至少与所述板状体的所述一部分相连且所述第二极耳至少与所述板状体的所述另一部分相连；
    柱状体，所述柱状体连接在所述板状体上且穿过所述盖板而伸出所述盖板的背向所述第一极芯和所述第二极芯的表面。
  3. 根据权利要求2所述的电池，其特征在于，所述第一侧区域和所述第二侧区域沿所述盖板的横向排列且以所述盖板的横向中心线为分界，所述板状体平均分布在所述第一侧区域和所述第二侧区域内。
  4. 根据权利要求2或3所述的电池，其特征在于，所述板状体的朝向所述第一极芯和所述第二极芯的表面构造成安装平面，所述第一极耳的所述至少一部分平行于所述安装平面且连接在所述安装平面上，所述第二极耳的所述至少一部分平行于所述安装平面且连接在所述安装平面上。
  5. 根据权利要求4所述的电池，其特征在于，所述第一极耳包括：
    第一连接部，所述第一连接部从所述第一极芯向远离所述第二极芯的方向延伸；
    第一折弯部，所述第一折弯部连接在所述第一连接部上且向所述第二极芯的方向折弯；
    第一安装部，所述第一安装部连接在所述第一折弯部上且向所述第二极芯的方向延伸，所述第一安装部平行于所述安装平面且连接在所述安装平面上。
  6. 根据权利要求4或5所述的电池，其特征在于，所述第二极耳包括：
    第二连接部，所述第二连接部从所述第二极芯向远离所述第一极芯的方向延伸；
    第二折弯部，所述第二折弯部连接在所述第二连接部上且向所述第一极芯的方向折弯；
    第二安装部，所述第二安装部连接在所述第二折弯部上且向所述第一极芯的方向延伸，所述第二安装部平行于所述安装平面且连接在所述安装平面上。
  7. 根据权利要求1-6中任一项所述的电池，其特征在于，所述第一极耳的所述至少一部分与所述第二极耳的所述至少一部分一体设置、间隔设置、相抵设置或重叠设置。
  8. 根据权利要求1-7中任一项所述的电池，其特征在于，所述第一极耳的所述至少一部分与所述极柱端子通过激光焊接、超声波焊接和铆接中的任意一种方式连接。
  9. 根据权利要求1-8中任一项所述的电池，其特征在于，所述第二极耳的所述至少一部分与所述极柱端子通过激光焊接、超声波焊接和铆接中的任意一种方式连接。
  10. 根据权利要求1-9中任一项所述的电池，其特征在于，所述第一极芯具有沿其长度方向间隔设置的两个所述第一极耳且分别为第一正极耳和第一负极耳，所述第二极芯具有沿其长度方向间隔设置的两个所述第二极耳且分别为第二正极耳和第二负极耳，所述极柱端子为两个且分别为正极柱端子和负极柱端子，所述第一正极耳和第二正极耳连接在所述正极柱端子上，所述第一负极耳和所述第二负极耳连接在所述负极柱端子上。
  11. 一种电池包，其特征在于，包括根据权利要求1-10中任一项所述的电池。
  12. 一种电动汽车，其特征在于，包括根据权利要求11所述的电池包。
PCT/CN2018/120788 2017-12-14 2018-12-13 电池和具有其的电池包、电动汽车 WO2019114781A1 (zh)

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