WO2021174403A1 - 电池、电池模组、电池包、电动车、储能装置和电动工具 - Google Patents

电池、电池模组、电池包、电动车、储能装置和电动工具 Download PDF

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Publication number
WO2021174403A1
WO2021174403A1 PCT/CN2020/077505 CN2020077505W WO2021174403A1 WO 2021174403 A1 WO2021174403 A1 WO 2021174403A1 CN 2020077505 W CN2020077505 W CN 2020077505W WO 2021174403 A1 WO2021174403 A1 WO 2021174403A1
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WIPO (PCT)
Prior art keywords
battery
cell
electrode lead
end surface
electrode
Prior art date
Application number
PCT/CN2020/077505
Other languages
English (en)
French (fr)
Inventor
李长江
张春辉
Original Assignee
东莞新能安科技有限公司
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 东莞新能安科技有限公司 filed Critical 东莞新能安科技有限公司
Priority to CN202080006467.0A priority Critical patent/CN113169401B/zh
Priority to PCT/CN2020/077505 priority patent/WO2021174403A1/zh
Publication of WO2021174403A1 publication Critical patent/WO2021174403A1/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
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/258—Modular batteries; Casings provided with means for assembling
    • 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
    • H01M50/298—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by the wiring of battery 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
    • H01M50/50—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
    • H01M50/509—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
    • H01M50/512—Connection only in parallel
    • 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 module, a battery pack, an electric vehicle, an energy storage device, and an electric tool.
  • one aspect of the present application provides a battery, which is solved by arranging a plurality of battery cells in a parallel state and in series connection in the spatial structure connection form in the housing of a single battery. How to achieve a battery design in which multiple cells are in parallel and connected in series in the spatial structure without increasing or greatly increasing the voltage of the single battery, which improves the energy of the single battery and battery pack Bulk density.
  • a single said battery includes a casing and a cell assembly arranged in the casing, the cell assembly includes N cells, where N is a positive value greater than or equal to 2. Integer; along the length of the cell, N cells are connected in sequence; each cell includes a first end surface and a second end surface, along the length direction of the cell, the first end surface and The second end faces are arranged opposite to each other, and both the first end face and the second end face are provided with a first electrode lead-out part and a second electrode lead-out part.
  • the electrodes of the first electrode lead-out part and the second electrode lead-out part The opposite; in the battery cell assembly, the first electrode lead-out part provided on the second end face of the n-1th cell and the first electrode lead-out part provided on the first end face of the nth cell Connected, and the second electrode lead-out component provided on the second end surface of the n-1th cell is connected to the second electrode lead-out component provided on the first end surface of the n-th cell.
  • the first electrode lead-out part of the first end face and the second electrode lead-out part of the second end face are arranged in the same position, and the second electrode lead-out part of the first end face The electrode lead-out part is arranged at the same position as the first electrode lead-out part of the second end surface.
  • the arrangement positions of the first electrode lead-out component and the second electrode lead-out component on the first end surface of the n-1th battery cell are the same as the first electrode on the first end surface of the n-th battery cell.
  • the lead-out component and the second electrode lead-out component are arranged at opposite positions; the first electrode lead-out part and the second electrode lead-out part are arranged on the second end surface of the n-1th cell and the second end surface of the n-th cell
  • the first electrode lead-out part and the second electrode lead-out part are arranged in opposite positions.
  • the battery cell includes a first pole piece, a second pole piece, and an isolation film disposed between the first pole piece and the second pole piece, and the first pole piece , The isolation film and the second pole piece are wound to form the battery core, the first electrode lead-out component is connected to the first pole piece, and the second electrode lead-out component is connected to the second pole piece.
  • the first electrode lead-out component includes a plurality of first electrode units. Along the thickness direction of the battery core, a plurality of first electrode units located on the first end surface are stacked to form the first end surface. In the first electrode lead-out component, a plurality of first electrode units located on the second end surface are stacked to form the first electrode lead-out component of the second end surface.
  • the plurality of first electrode units and the first pole piece are integrally formed.
  • the second electrode lead-out component includes a plurality of second electrode units.
  • a plurality of second electrode units located on the first end surface are stacked to form the The second electrode lead-out part of the first end surface, and a plurality of second electrode units located on the second end surface are stacked to form the second electrode lead-out part of the second end surface.
  • the plurality of second electrode units and the second pole piece are integrally formed.
  • the battery further includes a spacer, which is arranged between two adjacent battery cells, and the spacer has a first side and a second side that are arranged opposite to each other along the In the length direction of the cell, the first side abuts against the second end surface of the n-1th cell, and the second side abuts against the first end surface of the nth cell.
  • the spacer includes a first spacer block and a second spacer block, and the electrode lead-out part between two adjacent cells is sandwiched between the first spacer block and the second spacer block.
  • first isolation block is provided with a groove toward one side of the second isolation block, and the connecting portions of two adjacent electrode lead-out components are arranged in the groove.
  • the width of the groove is smaller than the width of the first isolation block.
  • the housing includes a main body, a first cover, and a second cover
  • the cell assembly is disposed in the main body
  • the first cover and the second cover The plates are respectively arranged at both ends of the main body.
  • N-1 spacers divide the inner cavity of the main body part into N mutually independent and sealed accommodating cavities, each One of the battery cores is accommodated in each of the accommodating cavities.
  • both the first cover plate and the second cover plate are provided with liquid injection ports, which respectively communicate with the first accommodating cavity and the N-th accommodating cavity.
  • a liquid injection channel is provided on the spacer, a liquid injection port corresponding to the liquid injection channel is opened on the side of the main body, and one end of the liquid injection channel is connected to a non-end of the containing cavity, so The other end of the liquid injection channel is connected to the outside through the liquid injection port on the side of the main body.
  • the first electrode lead-out component on the first end surface of the first cell is connected to the first electrode adapter
  • the second electrode lead-out component on the second end surface of the Nth cell is connected to the Two electrode adapters, the first electrode adapter and the second electrode adapter respectively extend from the first cover plate and the second cover plate to the housing.
  • the housing is a rectangular parallelepiped with a length L, a width H and a thickness D, the length L is greater than the width H, the width H is greater than the thickness D, and the length L is 300 ⁇ 2400mm.
  • the thickness D is greater than or equal to 5 mm and less than or equal to 20 mm.
  • the number of the battery cell assemblies is M, and M is an integer greater than or equal to 2, and along the thickness direction of the battery core assembly, the M battery core assemblies are stacked.
  • the present application provides a battery module, including a circuit board and a battery, the battery is any one of the foregoing batteries, and the circuit board is electrically connected to the battery.
  • the present application provides a battery pack, including a packaging body and a battery.
  • the battery is the battery described in any one of the foregoing, a plurality of the batteries are housed in the packaging body, and the plurality of batteries are electrically connected in parallel or in series.
  • the present application also provides an electric vehicle, including an engine and the above-mentioned battery pack, and the engine is electrically connected to the battery pack.
  • the present application also provides an energy storage device, including an energy converter and the battery in any of the above embodiments, and the energy converter is electrically connected to the battery.
  • the present application provides an electric tool including a transmission assembly, a driver, and the battery in any of the above embodiments, the transmission assembly is connected to the driver, and the driver is electrically connected to the battery.
  • a plurality of cells are arranged in a single battery case, each cell has at least two electrode lead-out parts with opposite polarities, and the plurality of cells are connected in series with each other in the spatial structure , And the multiple cells are electrically connected in parallel through the electrode lead-out parts, so that at least two cells in the shell form a spatial structure series connection and electrical parallel structure, thereby solving the problem of the structure of the single battery shell in series.
  • the technical problem that multiple cells cannot be electrically connected in parallel has reached a single cell structure in which the multiple cells inside the single cell are connected in series while maintaining a constant total voltage. , To achieve the purpose of increasing the length of the battery, but not increasing the total voltage.
  • FIG. 1 is a schematic diagram of a three-dimensional structure of a battery in an embodiment.
  • FIG. 2 is a schematic diagram of the structure of the cell assembly of the battery in FIG. 1.
  • FIG. 3 is a schematic diagram of the structure of a single cell of the cell assembly in FIG. 2.
  • FIG. 4 is a schematic diagram of the connection structure of a plurality of batteries shown in FIG. 3.
  • Fig. 5 is a schematic structural diagram of a single battery cell in another embodiment.
  • FIG. 6 is a schematic diagram of the connection structure of multiple batteries shown in FIG. 5.
  • FIG. 7 is a schematic diagram of a three-dimensional structure of a single battery cell in an embodiment.
  • FIG. 8 is a schematic diagram of an exploded structure of the battery cell assembly shown in FIG. 2.
  • Fig. 9 is a schematic diagram of an exploded structure of the battery shown in Fig. 1.
  • Fig. 10 is a perspective view of the structure of the battery cell assembly after it is installed in the housing.
  • FIG. 11 is a schematic cross-sectional structure diagram of the battery shown in FIG. 1.
  • FIG. 12 is a schematic diagram of the connection structure of a plurality of electric cores in the electric core assembly in series.
  • FIG. 13 is a schematic diagram of a stacked structure of a plurality of battery cell assemblies.
  • Fig. 14 is a side view of the stack structure shown in Fig. 13.
  • FIG. 15 is a structural block diagram of a battery module in an embodiment.
  • Fig. 16 is a structural block diagram of a battery pack in an embodiment.
  • Fig. 17 is a structural block diagram of an electric vehicle in an embodiment.
  • the first side 211 is a first side 211 .
  • the first side 33 is the first side 33
  • Packaging body 301
  • the present application provides a battery including a casing and a battery cell assembly arranged in the casing.
  • the battery cell assembly includes N battery cells, where N is a positive integer greater than or equal to 2;
  • the length direction of the core N of the battery cores are sequentially connected; each of the battery cores includes a first end surface and a second end surface, and along the length direction of the battery core, the first end surface and the second end surface are arranged opposite to each other ,
  • the first end surface and the second end surface are both provided with a first electrode lead-out part and a second electrode lead-out part, and the polarity of the first electrode lead-out part and the second electrode lead-out part are opposite;
  • the first electrode lead-out component provided on the second end surface of the n-1th cell is connected to the first electrode lead-out component provided on the first end surface of the n-th cell
  • the The second electrode lead-out component provided on the second end surface of the n-1th cell is connected to the second electrode lead-out component provided on the
  • a plurality of cells are arranged in a single battery case, each cell has at least two electrode lead-out parts with opposite polarities, and the plurality of cells are connected in series with each other in the spatial structure , And the multiple cells are electrically connected in parallel through the electrode lead-out parts, so that at least two cells in the shell form a spatial structure series connection and electrical parallel structure, thereby solving the problem of the structure of the single battery shell in series.
  • the technical problem that multiple cells cannot be electrically connected in parallel has reached a single cell structure in which the multiple cells inside the single battery are connected in series in terms of spatial structure while keeping the total voltage constant. , To achieve the purpose of increasing the length of the battery, but not increasing the total voltage.
  • the battery 100 includes a casing 10 and a battery cell assembly 20 disposed in the casing 10.
  • the cell assembly 20 includes N cells 21, and the N is a positive integer greater than or equal to 2.
  • the N cells 21 are sequentially connected along the first direction to form a spatial series connection.
  • the first direction may be the length direction of the cell 21, that is, the lateral direction in the viewing angle of FIG. 2.
  • Each of the cells 21 includes a first end surface 211 and a second end surface 212, and the first end surface 211 and the second end surface 212 are disposed opposite to each other along the first direction.
  • the first end surface 211 and the second end surface 212 are the two surfaces that are farthest apart in the length direction of the cell 21.
  • the first end surface 211 and the second end surface 212 are both provided with a first electrode lead-out part 22 and a second electrode lead-out part 23 for drawing current, the first electrode lead-out part 22 and the second electrode lead-out part
  • the polarity of 23 is opposite.
  • the first electrode lead-out component 22 provided on the second end surface 212 of the n-1th cell 21 and the first electrode lead-out component 22 provided on the first end surface 211 of the n-th cell 21 Connected, and the second electrode lead-out member 23 provided on the second end surface 212 of the n-1th cell 21 and the second electrode lead-out member 23 provided on the first end surface 211 of the n-th cell 21 lead out
  • the component 23 is connected so that the n-1 th battery cell 21 and the n th battery cell 21 are electrically connected in parallel and connected in series.
  • the first electrode lead-out part 22 of the first end surface 211 and the first electrode lead-out part 22 of the second end surface 212 are arranged The positions are the same, and the second electrode lead-out component 23 of the first end surface 211 and the second electrode lead-out component 23 of the second end surface 212 are arranged at the same position.
  • the first electrode lead-out member 22 of the first end surface 211 is a positive electrode
  • the second electrode lead-out member 23 of the first end surface 211 is a negative electrode
  • the first electrode lead-out member 22 of the second end surface 212 is a positive electrode.
  • the two-electrode lead-out member 23 is a negative electrode.
  • the first electrode lead-out component 22 of the first end surface 211 and the second electrode lead-out component 23 of the second end surface 212 are arranged at positions In the same way, the second electrode lead-out component 23 of the first end surface 211 and the first electrode lead-out component 22 of the second end surface 212 are arranged at the same position.
  • the first electrode lead-out member 22 of the first end surface 211 is a positive electrode
  • the second electrode lead-out member 23 of the first end surface 211 is a negative electrode
  • the first electrode lead-out member 22 of the second end surface 212 is a positive electrode.
  • the two-electrode lead-out member 23 is a negative electrode.
  • the first electrode lead-out part 22 and the second electrode lead-out part 23 on the first end surface 211 of the n-1th cell 21 are arranged at the same position as the first
  • the first electrode lead-out part and the second electrode lead-out part 23 on the first end surface 211 of the n cells 21 are arranged in opposite positions; the first electrode lead-out part 22 and the first electrode lead-out part 22 and the The location of the two electrode lead-out component 23 is opposite to the location of the first electrode lead-out component 22 and the second electrode lead-out component 23 on the second end surface 212 of the n-th cell 21.
  • the first electrode lead-out parts 22 and the second electrode lead-out parts 23 on the two adjacent first end faces 211 are arranged in opposite positions, and the first electrode lead-out parts 22 and the second electrode lead-out parts 23 on the two adjacent second end faces 212 are arranged in opposite positions.
  • the installation positions of the two electrode lead-out components 23 are opposite.
  • the N cells 21 are the same cell.
  • the cells connected after the first cell 21 need Appropriately flip 180° to meet the parallel requirements.
  • the arrangement direction of the nth cell and the n+1th cell are opposite, and the arrangement direction of the nth cell and the n+2th cell are the same.
  • the N cells 21 may be different. Specifically, the nth cell is the same as the n+2th cell, and the nth cell is different from the n+1th cell. In other words, the odd-numbered cells are of the same type, and the even-numbered cells are of another type.
  • the cell 21 includes a first pole piece 24, a second pole piece 25, and an isolation film 26 disposed between the first pole piece 24 and the second pole piece 25.
  • the polarity of a pole piece 24 is opposite to that of the second pole piece 25, and the first pole piece 24, the isolation film 26 and the second pole piece 25 are wound to form the electric core 21.
  • the first electrode lead-out component 22 is connected to the first pole piece 24 and has the same polarity as the first pole piece 24, and the second electrode lead-out component 23 is connected to the second pole piece 25 and is connected to The polarity of the second pole piece 25 is the same.
  • the first electrode extraction component 22 includes a plurality of first electrode units 221, and the second electrode extraction component 23 includes a plurality of second electrode units 231.
  • a plurality of first electrode units 221 located on the first end surface 211 are stacked to form the first electrode extraction member 22 of the first end surface 211
  • a plurality of first electrode units 221 located on the second end surface 212 are stacked to form The first electrode lead-out component forming the second end surface 212
  • the plurality of second electrode units 231 located on the first end surface 211 are stacked to form the second electrode lead-out component 23 of the first end surface 211
  • the two electrode units 231 are stacked to form the second electrode lead-out member 23 of the second end surface 212.
  • the second direction may be the thickness direction of the cell 21, and the first direction and the second direction are perpendicular to each other.
  • the multiple pieces of first electrode units 221 and the first pole piece 24 are integrally formed. Specifically, the multiple pieces of first electrode units 221 are formed by cutting the raw material of the current collector of the first pole piece 24.
  • the multiple pieces of second electrode units 231 and the second pole piece 25 are integrally formed. Specifically, the multiple pieces of second electrode units 231 are formed by cutting the material of the current collector of the second pole piece 25.
  • the cell 21 is a laminated cell, which is formed by stacking a plurality of first pole pieces 24, a plurality of second pole pieces 25, and an isolation film 26.
  • the battery 100 further includes a separator 30, and a separator 30 is provided between two adjacent battery cells 21.
  • the spacer 30 has a first side 33 and a second side 34 disposed oppositely. Along the first direction, the first side 33 abuts against the second end surface 212 of the n-1th cell 21 , The second side 34 abuts against the first end surface 211 of the n-th cell 21.
  • the isolator 30 includes a first isolating block 31 and a second isolating block 32. The electrode lead-out part between two adjacent cells 21 is sandwiched between the first isolating block 31 and the second isolating block 32. between.
  • the spacer 30 is used to separate the individual cells 21 and at the same time increase the connection strength between the electrode lead-out parts.
  • the first isolation block 31 defines a groove 311 facing one side surface of the second isolation block 32, and the connecting parts of two adjacent electrode lead-out components are arranged in the groove 311.
  • the second isolation block 32 is buckled with the first isolation block 31, the connecting portions of two adjacent electrode lead-out components are sealed in the isolation member.
  • the width of the groove 311 is smaller than the width of the first spacer 31, which is beneficial to improve the sealing performance of the spacer 30.
  • the number of the grooves 311 is the same as the number of the electrode lead-out parts on each end surface, so that the connection part of each electrode lead-out part can be individually sealed and the possibility of liquid leakage is reduced.
  • the housing 10 is approximately a rectangular parallelepiped with a length L, a width H, and a thickness D.
  • the length L is greater than the width H, and the width H is greater than the thickness D.
  • the casing 10 includes a main body portion 11, a first cover plate 12, and a second cover plate 13.
  • the main body portion 11 is approximately a rectangular casing with two ends open, and the battery core assembly 20 is inserted in the direction of the arrow shown in FIG.
  • the main body portion 11, the first cover plate 12 and the second cover plate 13 are respectively provided at two ends of the main body portion 11 to seal the cell assembly 20 inside the main body portion 11.
  • the outer peripheral side of the spacer 30 abuts against the inner peripheral surface of the main body 11, and N-1 spacers 30 connect the inner periphery of the main body 11
  • the cavity is divided into N mutually independent and sealed accommodating cavities 14, and each accommodating cavity 14 accommodates a single cell 21.
  • the first cell 21 is housed in the first accommodating cavity 14, and the first electrode lead-out component 22 on the first end surface 211 of the first cell 21 extends out of the housing 10;
  • One battery cell 21 is accommodated in the N-th receiving cavity 14, and the second electrode lead-out component 23 on the second end surface 212 of the N-th battery cell 21 extends out of the housing 10.
  • first electrode lead-out component 22 on the first end surface 211 of the first cell 21 is connected to the first electrode adapter 27, and the second electrode lead-out component 23 on the second end surface 212 of the N-th cell 21
  • the second electrode adapter 28 is connected, and the first electrode adapter 27 and the second electrode adapter 28 protrude from the first cover plate 12 and the second cover plate 13 respectively. ⁇ 10 ⁇ Body 10.
  • the first electrode lead-out component 22 and the second electrode lead-out component 23 on the first end surface 211 of the first cell 21, and the second end surface of the Nth cell 21 can extend out of the casing 10 at the same time, so as to simplify the parallel circuit structure between multiple batteries 100, and the multiple batteries can be completed without additional connection leads or patch cords.
  • Both the first cover plate 12 and the second cover plate 13 are provided with a liquid injection port 15, which respectively communicates with the first accommodating cavity 14 and the N-th accommodating cavity 14, and the electrolyte is filled from the liquid injection port 15.
  • the spacer 30 is provided with a liquid injection channel 35
  • the side wall of the main body portion 11 is provided with a liquid injection port corresponding to the liquid injection channel 35
  • one end of the liquid injection channel 35 is connected with a non-
  • the accommodating cavity 14 at one end is connected to the outside through a liquid injection port on the main body 11 at the other end to facilitate the injection of electrolyte into the accommodating cavity 14 located in the middle area.
  • the liquid injection port 15 and the liquid injection channel 35 are filled with sealing plugs to complete the sealing of the housing 10.
  • the liquid injection channel 35 is substantially linear, and is opened diagonally downward from the end of the spacer 30, so that the liquid injection channel 35 communicates from the side of the spacer 30 The accommodating cavity 14.
  • one end of the liquid injection channel 35 opens from the end of the spacer 30, and the other end of the liquid injection channel 35 opens from the side of the spacer 30.
  • the liquid injection channel 35 may also have other shapes, such as "L” shape, "S" shape, "T” shape, etc. The application is not limited thereto.
  • a plurality of cells 21 in the cell assembly 20 can also be electrically connected in series, and the first electrode provided on the second end surface 212 of the n-1th cell 21 leads out
  • the component 22 is connected to the second electrode lead-out component 23 provided on the first end surface 211 of the n-th cell 21, and the second electrode lead-out component 23 provided on the second end surface 212 of the n-1th cell 21 Is connected to the first electrode lead-out member 22 provided on the first end surface 211 of the n-th cell 21, so that the n-1th cell 21 and the n-th cell 21 are electrically connected in series and Structure series.
  • the number of cell assemblies 20 is M, and M is an integer greater than or equal to 2.
  • M cell assemblies 20 are stacked to form a cell body.
  • the cell body can be housed in the housing 10 or in a packaging bag to make Into a soft pack battery.
  • the stacked M battery cell assemblies 20 are electrically connected in parallel or in series.
  • the connection between the two electrode lead-out parts to be combined can be achieved by an adapter 40 which is substantially perpendicular to the first electrode lead-out part 22 or the second electrode lead-out part 23.
  • the ends of the electrode lead-out components may be bent, and then the bent parts of the two electrode lead-out components are combined to achieve the connection relationship between two adjacent battery core assemblies 20.
  • the first electrode lead-out part 22 located at the second end of the m-1th cell assembly 20 is connected to the second electrode lead-out part 23 at the first end of the m-th cell assembly 20, and is located at the m-1th end.
  • the second electrode lead-out component 23 at the second end of each cell assembly 20 is connected to the first electrode lead-out component 22 at the first end of the m-th cell assembly 20 to realize the electrical series connection of the M cell assemblies 20.
  • the present application provides a battery module 200 that includes a circuit board 201 and the battery 100 in any of the above-mentioned embodiments or combinations of embodiments, and the circuit board 201 is electrically connected to the battery 100.
  • the present application provides a battery pack 300, including a packaging body 301 and a plurality of batteries 100.
  • the battery 100 is the battery 100 in any one of the above-mentioned embodiments or a combination of embodiments, and the plurality of batteries 100 are housed in a place. Inside the package 301, a plurality of batteries 100 are electrically connected in parallel or in series.
  • the present application also provides an electric vehicle 400, which includes an engine 401 and the battery pack 300 in the above embodiment.
  • the battery pack 300 is electrically connected to the engine 401 to provide electric energy to the engine 401.
  • the present application further provides an energy storage device, including an energy converter and the battery 100 in any one of the above-mentioned embodiments or a combination of embodiments, and the energy converter is electrically connected to the battery.
  • the present application provides an electric tool, including a transmission assembly, a driver, and the battery 100 in any of the above embodiments or a combination of embodiments, the transmission assembly is connected to the driver, and the driver is electrically connected The battery.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
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Abstract

本申请提供一种电池，包括壳体和设置在所述壳体内的电芯组件，电芯组件包括N个电芯，N为大于或等于2的正整数；沿所述电芯的长度方向，所述电芯组件中的N个电芯依次连接；在电芯组件中，第n-1个电芯的第二端面设置的第一电极引出部件与第n个电芯的第一端面设置的第一电极引出部件连接，且第n-1个电芯的第二端面设置的第二电极引出部件与第n个电芯的第一端面设置的第二电极引出部件连接，以使所述第n-1个电芯与所述第n个电芯电气并联且结构串连。本申请还提供具有上述电池的电池模组、电池包、电动车、储能装置和电动工具。

Description

电池、电池模组、电池包、电动车、储能装置和电动工具 技术领域
本申请涉及电池领域，尤其涉及一种电池、电池模组、电池包、电动车、储能装置和电动工具。
背景技术
随着新能源产品应用场景的不断普及和扩充，尤其是新能源车辆，对于电池包的安全及能量体积密度的提升需求很大，增加单体电池的长度是提升能量体积密度的方法。如何在增加单体电池长度的同时，不增加单体电池的总电压，是目前业界面临的难点。
发明内容
鉴于上述情况，本申请的一个方面，提供了一种电池，通过在一个单体电池的外壳内设有多个处于并联状态，且在空间结构连接形态上处于串连连接的电芯，解决了如何在不提高或不大幅度提高单体电池电压的基础上，实现多个电芯处于并联状态，且在空间结构上处于串连连接的电池设计，提升了将单体电池及电池包的能量体积密度。
在一可选实施例中，单个所述电池中，包括壳体和设置在所述壳体内的电芯组件，所述电芯组件包括N个电芯，所述N为大于或等于2的正整数；沿所述电芯的长度方向，N个所述电芯依次连接；每个所述电芯包括第一端面和第二端面，沿所述电芯的长度方向，所述第一端面与所述第二端面相对设置，所述第一端面和所述第二端面均设置第一电极引出部件和第二电极引出部件，所述第一电极引出部件与所述第二电极引出部件的极性相反；在所述电芯组件中， 第n-1个电芯的第二端面设置的所述第一电极引出部件与第n个电芯的第一端面设置的所述第一电极引出部件连接，且所述第n-1个电芯的第二端面设置的所述第二电极引出部件与所述第n个电芯的第一端面设置的所述第二电极引出部件连接。
在一可选实施例中，单个所述电芯中，所述第一端面的第一电极引出部件与所述第二端面的第二电极引出部件设置位置相同，所述第一端面的第二电极引出部件与所述第二端面的第一电极引出部件设置位置相同。
进一步地，所述电芯组件中，第n-1个电芯的第一端面上第一电极引出部件和第二电极引出部件的设置位置与第n个电芯的第一端面上第一电极引出部件和第二电极引出部件的设置位置相反；第n-1个电芯的第二端面上第一电极引出部件和第二电极引出部件的设置位置与第n个电芯的第二端面上第一电极引出部件和第二电极引出部件的设置位置相反。
在一可选实施例中，所述电芯包括第一极片、第二极片和设置于所述第一极片和所述第二极片之间的隔离膜，所述第一极片、所述隔离膜和所述第二极片绕卷形成所述电芯，所述第一电极引出部件连接所述第一极片，所述第二电极引出部件连接所述第二极片。
进一步地，所述第一电极引出部件包括多片第一电极单元，沿所述电芯的厚度方向，位于所述第一端面的多片第一电极单元层叠设置以形成所述第一端面的所述第一电极引出部件，位于所述第二端面的多片第一电极单元层叠设置以形成所述第二端面的所述第一电极引出部件。
进一步地，所述多片第一电极单元与所述第一极片一体成型。
在一可选实施例中，所述第二电极引出部件包括多片第二电极单元，沿所述电芯的厚度方向，位于所述第一端面的多片第二电极单元层叠设置以形成所述第一端面的所述第二电极引出部件，位于 所述第二端面的多片第二电极单元层叠设置以形成所述第二端面的所述第二电极引出部件。
进一步地，所述多片第二电极单元与所述第二极片一体成型。
在一可选实施例中，所述电池还包括隔离件，设置于相邻两个所述电芯之间，所述隔离件具有相对设置的第一侧边和第二侧边，沿所述电芯的长度方向，所述第一侧边抵接所述第n-1个电芯的第二端面，所述第二侧边抵接所述第n个电芯的第一端面。
进一步地，所述隔离件包括第一隔离块和第二隔离块，相邻两个电芯之间的电极引出部件夹设于所述第一隔离块和所述第二隔离块之间。
进一步地，所述第一隔离块朝向所述第二隔离块的一侧开设凹槽，相邻两个电极引出部件的连接部设置在所述凹槽中。
进一步地，沿所述电芯的长度方向，所述凹槽的宽度小于所述第一隔离块的宽度。
在一可选实施例中，所述壳体包括主体部、第一盖板和第二盖板，所述电芯组件设置在所述主体部内，所述第一盖板和所述第二盖板分别设置于所述主体部的两端。
进一步地，所述隔离件的外周侧抵接所述主体部的内周面，N-1个所述隔离件将所述主体部的内腔分成N个相互独立的且密封的容纳腔，每个所述容纳腔内收容一个所述电芯。
进一步地，所述第一盖板和所述第二盖板上均设有注液口，分别连通第一个所述容纳腔和第N个所述容纳腔。
进一步地，所述隔离件上开设注液通道，所述主体部的侧面开设对应所述注液通道的注液口，所述注液通道的一端连接一个非端部的所述容纳腔，所述注液通道的另一端通过所述主体部侧面的所述注液口连接外部。
在一可选实施例中，第一个电芯的第一端面上的第一电极引出 部件连接第一电极转接件，第N个电芯的第二端面上的第二电极引出部件连接第二电极转接件，所述第一电极转接件和所述第二电极转接件分别从所述第一盖板和所述第二盖板伸出所述壳体。
在一可选实施例中，所述壳体为长方体，具有长度L、宽度H和厚度D，所述长度L大于所述宽度H，所述宽度H大于所述厚度D，所述长度L为300～2400mm。
进一步地，所述厚度D大于或等于5mm且小于或等于20mm。
在一可选实施例中，所述长度L与所述宽度H满足：L/H＝3～20。
在一可选实施例中，所述电芯组件的数量为M个，M为大于或等于2的整数，沿所述电芯组件的厚度方向，M个所述电芯组件层叠设置。
本申请提供一种电池模组，包括电路板和电池，所述电池为上述任一项所述的电池，所述电路板电连接所述电池。
本申请提供一种电池包，包括包装体和电池，所述电池为上述任一项所述的电池，多个所述电池收容在所述包装体内，且多个所述电池电气并联或串联。
本申请还提供一种电动车，包括发动机和上述电池包，所述发动机电连接所述电池包。
本申请还提供一种储能装置，包括能量转换器和上述任一实施例中的电池，所述能量转换器电连接所述电池。
本申请提供一种电动工具，包括传动组件、驱动器和和上述任一实施例中的电池，所述传动组件连接所述驱动器，所述驱动器电连接所述电池。
上述技术方案提供的电池，通过在单体电池壳体内，设置多个电芯，每个电芯均具有至少两个极性相反的电极引出部件，多个电芯在空间结构上相互串连连接，且将多个电芯通过电极引出部件之间电气并联连接，使得壳体内的至少两个电芯形成空间结构串连式 且电气并联的结构，从而解决了单体电池壳体内结构串连的多个电芯之间无法进行电气的并联连接的技术问题，达到了在保持总电压恒定的情形下，在空间结构上使单体电池内部的多个电芯处于串连连接的单体电池结构，实现电池长度增加，但总电压不增加的目的。
附图说明
为了更清楚地说明本申请实施例或现有技术中的技术方案，下面将对实施例中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本申请的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其它的附图。
图1为电池在一实施例中的立体结构示意图。
图2为图1中电池的电芯组件的结构示意图。
图3为图2中电芯组件的单个电芯的结构示意图。
图4为多个图3所示电芯的连接结构示意图。
图5单个电芯在另一实施例中的结构示意图。
图6为多个图5所示电芯的连接结构示意图。
图7为单个电芯在一实施例中的立体结构示意图。
图8为图2所示电芯组件的分解结构示意图。
图9为图1所示电池的分解结构示意图。
图10为电芯组件装入壳体后的透视结构示意图。
图11为图1所示电池的剖面结构示意图。
图12为电芯组件中多个电芯电气串联的连接结构示意图。
图13为多个电芯组件堆叠的结构示意图。
图14为图13所示堆叠结构的侧视图。
图15为电池模组在一实施例中的结构框图。
图16为电池包在一实施例中的结构框图。
图17为电动车在一实施例中的结构框图。
主要元件符号说明：
电池                      100
壳体                      10
主体部                    11
第一盖板                  12
第二盖板                  13
容纳腔                    14
注液口                    15
电芯组件                  20
电芯                      21
第一端面                  211
第二端面                  212
第一电极引出部件          22
第一电极单元              221
第二电极引出部件          23
第二电极单元              231
第一极片                  24
第二极片                  25
隔离膜                    26
第一电极转接件            27
第二电极转接件            28
隔离件                    30
第一隔离块                31
凹槽                      311
第二隔离块                32
第一侧边                  33
第二侧边                  34
注液通道                  35
转接件                    40
电池模组                  200
电路板                    201
电池包                    300
包装体                    301
电动车                    400
发动机                    401
具体实施方式：
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅是本申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。
需要说明的是，当元件被称为“固定于”另一个元件，它可以直接在另一个元件上或者也可以存在居中的元件。当一个元件被认为是“连接”另一个元件，它可以是直接连接到另一个元件或者可能同时存在居中元件。当一个元件被认为是“设置于”另一个元件，它可以是直接设置在另一个元件上或者可能同时存在居中元件。本文所使用的术语“垂直的”、“水平的”、“左”、“右”以及类似的表述只是为了说明的目的。
除非另有定义，本文所使用的所有的技术和科学术语与属于本申请的技术领域的技术人员通常理解的含义相同。本文中在本申请的说明书中所使用的术语只是为了描述具体的实施方式的目的，不 是旨在于限制本申请。本文所使用的术语“或/及”包括一个或多个相关的所列项目的任意的和所有的组合。
本申请提供了一种电池，包括壳体和设置在所述壳体内的电芯组件，所述电芯组件包括N个电芯，所述N为大于或等于2的正整数；沿所述电芯的长度方向N个所述电芯依次连接；每个所述电芯包括第一端面和第二端面，沿所述电芯的长度方向，所述第一端面与所述第二端面相对设置，所述第一端面和所述第二端面均设置第一电极引出部件和第二电极引出部件，所述第一电极引出部件与所述第二电极引出部件的极性相反；在所述电芯组件中，第n-1个电芯的第二端面设置的所述第一电极引出部件与所述第n个电芯的第一端面设置的所述第一电极引出部件连接，且所述第n-1个电芯的第二端面设置的所述第二电极引出部件与所述第n个电芯的第一端面设置的所述第二电极引出部件连接。
上述技术方案提供的电池，通过在单体电池壳体内，设置多个电芯，每个电芯均具有至少两个极性相反的电极引出部件，多个电芯在空间结构上相互串连连接，且将多个电芯通过电极引出部件之间电气并联连接，使得壳体内的至少两个电芯形成空间结构串连式且电气并联的结构，从而解决了单体电池壳体内结构串连的多个电芯之间无法进行电气的并联连接的技术问题，达到了在保持总电压恒定的情形下，在空间结构上使单体电池内部的多个电芯处于串连连接的单体电池结构，实现电池长度增加，但总电压不增加的目的。
本申请的一些实施方式作详细说明。在不冲突的情况下，下述的实施方式及实施方式中的特征可以相互组合。
请参阅图1和图2，电池100包括壳体10和设置在壳体10内的电芯组件20。所述电芯组件20包括N个电芯21，所述N为大于或等于2的正整数。N个所述电芯21沿第一方向依次连接，形成空间上的串连连接。所述第一方向可以是所述电芯21的长度方向，即 图2视角的横向方向。每个所述电芯21包括第一端面211和第二端面212，沿所述第一方向，所述第一端面211与所述第二端面212相对设置。在本申请的实施例中，第一端面211和第二端面212为电芯21长度方向上距离最远的两个面。所述第一端面211和所述第二端面212均设置用于引出电流的第一电极引出部件22和第二电极引出部件23，所述第一电极引出部件22与所述第二电极引出部件23的极性相反。在所述电芯组件20中，第n-1个电芯21的第二端面212设置的第一电极引出部件22与第n个电芯21的第一端面211设置的第一电极引出部件22连接，且所述第n-1个电芯21的第二端面212设置的所述第二电极引出部件23与所述第n个电芯21的第一端面211设置的所述第二电极引出部件23连接，以使所述第n-1个电芯21与所述第n个电芯21电气并联且结构串连。
请参阅图3，在本申请的其中一个实施例，单个所述电芯21中，所述第一端面211的第一电极引出部件22与所述第二端面212的第一电极引出部件22设置位置相同，所述第一端面211的第二电极引出部件23与所述第二端面212的第二电极引出部件23设置位置相同。第一端面211的第一电极引出部件22为正极，第一端面211的第二电极引出部件23为负极，且第二端面212的第一电极引出部件22为正极，且第二端面212的第二电极引出部件23为负极。
请参阅图4，多个电芯21连接成电芯组件20时，多个分别设置于各电芯21端面的第一电极引出部件22的设置位置相同，同时多个分别设置于各电芯端面的第二电极引出部件23的设置位置相同。以图4的视角，多个电芯21的第一电极引出部件22相互平齐并排列在电芯组件20的上半部分，多个电芯21的第二电极引出部件23相互平齐并排列在电芯组件20的下半部分。
请参阅图5，在本申请的另一实施例中，对于单个电芯21，所述第一端面211的第一电极引出部件22与所述第二端面212的第二 电极引出部件23设置位置相同，所述第一端面211的第二电极引出部件23与所述第二端面212的第一电极引出部件22设置位置相同。第一端面211的第一电极引出部件22为正极，第一端面211的第二电极引出部件23为负极，且第二端面212的第一电极引出部件22为正极，且第二端面212的第二电极引出部件23为负极。
请参阅图6，多个电芯21连接成电芯组件20时，第n-1个电芯21的第一端面211上第一电极引出部件22和第二电极引出部件23的设置位置与第n个电芯21的第一端面211上第一电极引出部件和第二电极引出部件23的设置位置相反；第n-1个电芯21的第二端面212上第一电极引出部件22和第二电极引出部件23的设置位置与第n个电芯21的第二端面212上第一电极引出部件22和第二电极引出部件23的设置位置相反。换句话说，相邻两个第一端面211上的第一电极引出部件22和第二电极引出部件23的设置位置相反，相邻两个第二端面212上的第一电极引出部件22和第二电极引出部件23的设置位置相反。在本申请的实施例中，N个电芯21为相同的电芯，当使用图5所示的电芯21连接成电芯组件20时，连接在第一个电芯21之后的电芯需要适当的翻转180°以满足并联需求，第n个电芯与第n+1个电芯的设置方向相反，第n个电芯与第n+2个电芯的设置方向相同。在其他实施例中，N个电芯21可以不相同，具体地，第n个电芯和第n+2个电芯相同，第n个电芯与第n+1个电芯不相同。换句话说，第奇数个电芯是同一类型的电芯，第偶数个电芯是另一类型的电芯。
请参阅图7，所述电芯21包括第一极片24、第二极片25和设置于所述第一极片24与所述第二极片25之间的隔离膜26，所述第一极片24与所述第二极片25的极性相反，所述第一极片24、所述隔离膜26和所述第二极片25绕卷形成所述电芯21。所述第一电极引出部件22连接所述第一极片24，并与所述第一极片24的极性相 同，所述第二电极引出部件23连接所述第二极片25，并与所述第二极片25的极性相同。
在本申请的其中一个实施例中，所述第一电极引出部件22包括多片第一电极单元221，所述第二电极引出部件23包括多片第二电极单元231。沿第二方向，位于第一端面211的多片第一电极单元221层叠设置以形成第一端面211的第一电极引出部件22，位于第二端面212的多片第一电极单元221层叠设置以形成第二端面212的第一电极引出部件，位于第一端面211的多片第二电极单元231层叠设置以形成第一端面211的第二电极引出部件23，位于第二端面212的多片第二电极单元231层叠设置以形成第二端面212的第二电极引出部件23。所述第二方向可以是所述电芯21的厚度方向，所述第一方向与所述第二方向相互垂直。
多片第一电极单元221与第一极片24一体成型，具体地，多片第一电极单元221通过裁切第一极片24的集流体的原材料形成。多片第二电极单元231与第二极片25一体成型，具体地，多片第二电极单元231通过裁切第二极片25的集流体的原材料形成。
可以理解，在其他实施例中，所述电芯21为叠片电芯，由多片第一极片24、多片第二极片25及隔离膜26层叠设置形成。
请参阅图1、图8和图9，电池100还包括隔离件30，相邻两个电芯21之间设置一个隔离件30。所述隔离件30具有相对设置的第一侧边33和第二侧边34，沿所述第一方向，所述第一侧边33抵接第n-1个电芯21的第二端面212，所述第二侧边34抵接第n个电芯21的第一端面211。所述隔离件30包括第一隔离块31和第二隔离块32，相邻两个电芯21之间的电极引出部件夹设于所述第一隔离块31和所述第二隔离块32之间。所述隔离件30用于间隔各个单体电芯21，同时增加电极引出部件之间的连接强度。所述第一隔离块31朝向所述第二隔离块32的一侧表面开设凹槽311，相邻两 个电极引出部件的连接部设置在所述凹槽311中。所述第二隔离块32与所述第一隔离块31扣合时，相邻两个电极引出部件的连接部被密封在所述隔离件中。沿所述第一方向，所述凹槽311的宽度小于所述第一隔离块31的宽度，有利于提高隔离件30的密封性能。在本申请的实施例中，所述凹槽311的数量与各端面上的电极引出部件的数量相同，从而使每个电极引出部件的连接部能够单独密封，减少漏液的可能。
壳体10大致为长方体，具有长度L、宽度H和厚度D，所述长度L大于所述宽度H，所述宽度H大于所述厚度D。长度L为400～2500mm，厚度D大于10mm，长度L与宽度H的尺寸关系满足公式：L/H＝3～20。
壳体10包括主体部11、第一盖板12和第二盖板13，所述主体部11大致为两端开口的长方形壳体，所述电芯组件20以图9所示的箭头方向插入所述主体部11，所述第一盖板12和所述第二盖板13分别设置所述主体部11两端，以将电芯组件20密封所述主体部11内。请继续参阅图10，电芯组件20装入所述壳体10后，隔离件30的外周侧抵接所述主体部11的内周面，N-1个隔离件30将主体部11的内腔分成N个相互独立且密封的容纳腔14，每个容纳腔14内收容一个单体电芯21。沿电池100的长度方向，第一个电芯21收容在第一个容纳腔14内，第一个电芯21的第一端面211上的第一电极引出部件22伸出壳体10；第N个电芯21收容在第N个容纳腔14内，第N个电芯21的第二端面212上的第二电极引出部件23伸出壳体10。进一步地，第一个电芯21的第一端面211上的第一电极引出部件22连接第一电极转接件27，第N个电芯21的第二端面212上的第二电极引出部件23连接第二电极转接件28，所述第一电极转接件27和所述第二电极转接件28分别从所述第一盖板12和所述第二盖板13伸出所述壳体10。
可以理解，在本申请的其他实施例中，第一个电芯21的第一端面211上的第一电极引出部件22和第二电极引出部件23，及第N个电芯21的第二端面212上的第一电极引出部件22和第二电极引出部件23可以同时伸出所述壳体10，以简化多个电池100之间的并联电路结构，无需额外连接引线或转接线就能完成多个电池100的并联和空间结构上的串连连接。
第一盖板12和第二盖板13上均设有注液口15，分别连通第一个所述容纳腔14和第N个所述容纳腔14，电解液从所述注液口15充入第一个容纳腔14和第N个容纳腔14。请继续参阅图11，所述隔离件30上开设注液通道35，所述主体部11的侧壁开设对应所述注液通道35的注液口，所述注液通道35的一端连接一个非端部的容纳腔14，另一端通过主体部11上的注液口连接外部，以方便电解液注入位于中间区域的容纳腔14。注液过程完成后，所述注液口15和注液通道35内均填充密封塞，以完成壳体10的密封。在本申请的实施例中，所述注液通道35大致呈直线型，从所述隔离件30的端部斜向下开设，使所述注液通道35从所述隔离件30的侧边连通所述容纳腔14。换句话说，所述注液通道35的一端从所述隔离件30的端部开口，所述注液通道35的另一端从所述隔离件30的侧边开口。在其他可选实施例中，所述注液通道35还可以呈其他形状，例如“L”型、“S”型、“T”型等，本申请不限定于此。
请参阅图12，在本申请的另一实施例中，电芯组件20中的多个电芯21还可以电气串联，第n-1个电芯21的第二端面212设置的第一电极引出部件22与第n个电芯21的第一端面211设置的第二电极引出部件23连接，且所述第n-1个电芯21的第二端面212设置的所述第二电极引出部件23与所述第n个电芯21的第一端面211设置的所述第一电极引出部件22连接，以使所述第n-1个电芯21与所述第n个电芯21电气串联且结构串连。
请参阅图13和图14，在本申请的其他实施例中，电芯组件20的数量为M个，M为大于或等于2的整数。沿电芯组件20的厚度方向，M个电芯组件20层叠设置，以形成一个电芯体，所述电芯体既可以收容在壳体10内，也可以收容在一包装袋中，以制成软包电池。层叠设置的M个电芯组件20电气并联或串联。两个需要结合的电极引出部件之间可以通过转接件40实现连接关系，所述转接件40大致垂直于所述第一电极引出部件22或所述第二电极引出部件23。在其他可选实施例中，可以通过弯折电极引出部件的端部，再将两个电极引出部件的弯折部结合以实现相邻两个电芯组件20连接关系。
具体地，沿所述电芯组件20的长度方向，所述电芯组件20包括相对设置的第一端和第二端，在本申请的实施例中，所述第一端和第二端为电芯组件20长度方向上距离最远的两端。位于第m-1个电芯组件20第二端的第一电极引出部件22连接第m个电芯组件20第一端的第一电极引出部件22，位于第m-1个电芯组件20第二端的第二电极引出部件23连接第m个电芯组件20第一端的第二电极引出部件23，以实现M个电芯组件20的电气并联。在另一实施例中，位于第m-1个电芯组件20第二端的第一电极引出部件22连接第m个电芯组件20第一端的第二电极引出部件23，位于第m-1个电芯组件20第二端的第二电极引出部件23连接第m个电芯组件20第一端的第一电极引出部件22，以实现M个电芯组件20的电气串联。
请参阅图15，本申请提供一种电池模组200，包括电路板201和上述任一实施例或实施例组合中的电池100，所述电路板201与所述电池100电连接。
请参阅图16，本申请提供一种电池包300，包括包装体301和多个电池100，所述电池100为上述任一实施例或实施例组合中的 电池100，多个电池100收容在所述包装体301内，且多个电池100电气并联或串联。
请参阅图17，本申请还提供一种电动车400，包括发动机401和上述实施例中的电池包300，所述电池包300与所述发动机401电连接，以提供电能至所述发动机401。
在一可选实施例中，本申请还提供一种储能装置，包括能量转换器和上述任一实施例或实施例组合中的电池100，所述能量转换器电连接所述电池。
在另一实施例中，本申请提供一种电动工具，包括传动组件、驱动器和和上述任一实施例或实施例组合中的电池100，所述传动组件连接所述驱动器，所述驱动器电连接所述电池。
以上实施方式仅用以说明本申请的技术方案而非限制，尽管参照以上较佳实施方式对本申请进行了详细说明，本领域的普通技术人员应当理解，可以对本申请的技术方案进行修改或等同替换都不应脱离本申请技术方案的精神和范围。

Claims (23)

  1. 一种电池，包括：
    壳体；和
    电芯组件，设置在所述壳体内；
    其特征在于，所述电芯组件包括N个电芯，所述N为大于或等于2的正整数；
    沿所述电芯的长度方向，N个所述电芯依次连接；
    每个所述电芯包括第一端面和第二端面，沿所述电芯的长度方向，所述第一端面与所述第二端面相对设置，所述第一端面和所述第二端面均设置第一电极引出部件和第二电极引出部件，所述第一电极引出部件与所述第二电极引出部件的极性相反，所述第一端面的第一电极引出部件与所述第二端面的第二电极引出部件设置位置相同，所述第一端面的第二电极引出部件与所述第二端面的第一电极引出部件设置位置相同；
    在所述电芯组件中，第n-1个电芯的第二端面设置的所述第一电极引出部件与第n个电芯的第一端面设置的所述第一电极引出部件连接，且所述第n-1个电芯的第二端面设置的所述第二电极引出部件与所述第n个电芯的第一端面设置的所述第二电极引出部件连接。
  2. 如权利要求1所述的电池，其特征在于，所述电芯组件中，第n-1个电芯的第一端面上第一电极引出部件和第二电极引出部件的设置位置与第n个电芯的第一端面上第一电极引出部件和第二电极引出部件的设置位置相反；第n-1个电芯的第二端面上第一电极引出部件和第二电极引出部件的设置位置与第n个电芯的第二端面上第一电极引出部件和第二电极引出部件的设置位置相反。
  3. 如权利要求1所述的电池，其特征在于，所述N个电芯为相同电芯，第n个电芯与第n+1个电芯的设置方向相反，第n个电芯与第 n+2个电芯的设置方向相同。
  4. 如权利要求1所述的电池，其特征在于，所述N个电芯为不同电芯，第n个电芯与第n+1个电芯不同，第n个电芯与第n+2个电芯相同。
  5. 如权利要求1所述的电池，其特征在于，所述电池还包括隔离件，设置于相邻两个所述电芯之间，所述隔离件具有相对设置的第一侧边和第二侧边，沿所述电芯的长度方向，所述第一侧边抵接所述第n-1个电芯的第二端面，所述第二侧边抵接所述第n个电芯的第一端面。
  6. 如权利要求5所述的电池，其特征在于，所述隔离件包括第一隔离块和第二隔离块，相邻两个电芯之间的电极引出部件夹设于所述第一隔离块和所述第二隔离块之间。
  7. 如权利要求6所述的电池，其特征在于，所述第一隔离块朝向所述第二隔离块的一侧开设凹槽，相邻两个电极引出部件的连接部设置在所述凹槽中。
  8. 如权利要求7所述的电池，其特征在于，沿所述电芯的长度方向，所述凹槽的宽度小于所述第一隔离块的宽度。
  9. 如权利要求5所述的电池，其特征在于，所述壳体包括主体部、第一盖板和第二盖板，所述电芯组件设置在所述主体部内，所述第一盖板和所述第二盖板分别设置于所述主体部的两端。
  10. 如权利要求9所述的电池，其特征在于，所述隔离件的外周侧抵接所述主体部的内周面，N-1个所述隔离件将所述主体部的内腔分成N个相互独立的且密封的容纳腔，每个所述容纳腔内收容一个所述电芯。
  11. 如权利要求10所述的电池，其特征在于，所述第一盖板和所述第二盖板上均设有注液口，分别连通第一个所述容纳腔和第N个所述容纳腔。
  12. 如权利要求10所述的电池，其特征在于，所述隔离件上开设注液通道，所述主体部的侧面开设对应所述注液通道的注液口，所述注液通道的一端连接一个非端部的所述容纳腔，所述注液通道的另一端通过所述主体部侧面的所述注液口连接外部。
  13. 如权利要求9所述的电池，其特征在于，第一个电芯的第一端面上的第一电极引出部件连接第一电极转接件，第N个电芯的第二端面上的第二电极引出部件连接第二电极转接件，所述第一电极转接件和所述第二电极转接件分别从所述第一盖板和所述第二盖板伸出所述壳体。
  14. 如权利要求1所述的电池，其特征在于，所述壳体为长方体，具有长度L、宽度H和厚度D，所述长度L大于所述宽度H，所述宽度H大于所述厚度D，所述长度L为300～2400mm。
  15. 如权利要求14所述的电池，其特征在于，所述厚度D大于或等于5mm且小于或等于20mm。
  16. 如权利要求14所述的电池，其特征在于，所述长度L与所述宽度H满足：L/H＝3～20。
  17. 如权利要求1所述的电池，其特征在于，所述电芯组件的数量为M个，M为大于或等于2的整数，沿所述电芯组件的厚度方向，M个所述电芯组件层叠设置，并电气串联。
  18. 如权利要求17所述的电池，其特征在于，M个所述电芯组件的电极引出部件通过转接件连接；或者M个所述电芯组件通过弯折电极引出部件并将弯折部结合，以连接相邻两个电芯组件。
  19. 一种电池模组，包括电路板和电池，其特征在于，所述电池为权利要求1-18任一项所述的电池，所述电路板电连接所述电池。
  20. 一种电池包，包括包装体和电池，其特征在于，所述电池为权利要求1-18任一项所述的电池，多个所述电池收容在所述包装体内。
  21. 一种电动车，包括发动机和电池包，其特征在于，所述电池包为权利要求20所述的电池包，所述发动机电连接所述电池包。
  22. 一种储能装置，包括能量转换器和电池，其特征在于，所述电池为权利要求1-18任一项所述的电池，所述能量转换器电连接所述电池。
  23. 一种电动工具，包括传动组件、驱动器和电池，其特征在于，所述电池为权利要求1-18任一项所述的电池，所述传动组件连接所述驱动器，所述驱动器电连接所述电池。
PCT/CN2020/077505 2020-03-02 2020-03-02 电池、电池模组、电池包、电动车、储能装置和电动工具 WO2021174403A1 (zh)

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