WO2024032641A1 - Module de batterie et bloc-batterie - Google Patents

Module de batterie et bloc-batterie Download PDF

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Publication number
WO2024032641A1
WO2024032641A1 PCT/CN2023/111867 CN2023111867W WO2024032641A1 WO 2024032641 A1 WO2024032641 A1 WO 2024032641A1 CN 2023111867 W CN2023111867 W CN 2023111867W WO 2024032641 A1 WO2024032641 A1 WO 2024032641A1
Authority
WO
WIPO (PCT)
Prior art keywords
battery module
plate
battery
fpc
end plate
Prior art date
Application number
PCT/CN2023/111867
Other languages
English (en)
Chinese (zh)
Inventor
陈保国
程岩
张福增
刘洪鹏
徐淼
Original Assignee
天津市捷威动力工业有限公司
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
Priority claimed from CN202210948912.6A external-priority patent/CN115241612B/zh
Priority claimed from CN202223039038.9U external-priority patent/CN218939920U/zh
Application filed by 天津市捷威动力工业有限公司 filed Critical 天津市捷威动力工业有限公司
Publication of WO2024032641A1 publication Critical patent/WO2024032641A1/fr

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • 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
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/61—Types of temperature control
    • H01M10/613—Cooling or keeping cold
    • 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
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/64—Heating or cooling; Temperature control characterised by the shape of the cells
    • H01M10/647—Prismatic or flat cells, e.g. pouch cells
    • 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
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/655—Solid structures for heat exchange or heat conduction
    • 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
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/655—Solid structures for heat exchange or heat conduction
    • H01M10/6554—Rods or plates
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/655—Solid structures for heat exchange or heat conduction
    • H01M10/6556—Solid parts with flow channel passages or pipes for heat exchange
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
    • H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
    • H01M50/209—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for prismatic or rectangular cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/244—Secondary casings; Racks; Suspension devices; Carrying devices; Holders characterised by their mounting method
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/258—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
    • H01M50/284—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders with incorporated circuit boards, e.g. printed circuit boards [PCB]
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/289—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by spacing elements or positioning means within frames, racks or packs
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
    • H01M50/519—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing comprising printed circuit boards [PCB]
    • 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
    • H01M50/548—Terminals characterised by the disposition of the terminals on the cells on opposite sides 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
    • H01M50/569—Constructional details of current conducting connections for detecting conditions inside cells or batteries, e.g. details of voltage sensing terminals

Definitions

  • This application belongs to the technical field of the new energy automobile industry and relates to a battery module and a battery pack.
  • the FPC is set to collect the temperature data and voltage data of the battery core, and the battery module
  • the FPC When assembling the battery pack, the FPC is usually placed on the top of the battery core and between the battery core and the cooling plate. This structural arrangement causes part of the heat transmitted from the battery core to the cooling plate to be blocked by the FPC, thereby reducing the battery core's durability. Heat dissipation efficiency.
  • the FPC usually transfers the collected temperature data and voltage data to the battery management system (Battery Management System, BMS) through the battery management unit (BMU).
  • BMS Battery Management System
  • BMU battery management unit
  • the BMU is related to the battery model.
  • the battery packs are installed separately in the battery box. When assembling the battery pack, you need to first The BMU and battery module are installed into the battery box respectively, and then the BMU and FPC are assembled. This structural setting increases the difficulty of assembling the BMU and FPC and is not conducive to improving production efficiency.
  • this application provides battery modules and battery packs, and the FPC acquisition board is connected inside the battery module to reduce the space of the module series wiring harness, which is conducive to improving the efficiency of module series and parallel connection.
  • the battery module can not only improve the heat dissipation efficiency of the battery core, but also realize the assembly of BMU and FPC at the battery module level.
  • this application provides a battery module, which includes a battery module, a side plate, a first end plate, a second end plate, a BMU slave board, a lead-out copper bar and an FPC collection board;
  • the side plates are located on both sides of the battery module, and the first end plate and the second end plate are respectively located at both ends of the battery module;
  • the BMU slave board is integrated on a side surface of the first end plate away from the battery core module;
  • the lead-out copper bar includes a positive lead-out copper bar and a negative lead-out copper bar respectively provided at both ends of the battery module;
  • a first insulating component is provided between the battery module and the first end plate to insulate the battery module and the negative lead copper bar;
  • a second insulation component is provided between the battery module and the second end plate to insulate the battery module and the positive lead copper bar;
  • the FPC collection board includes a bending part and a connecting part.
  • the connecting part extends between the battery module and the side plate.
  • the bending part passes through the first insulating component and bends and extends. Connect the BMU slave board to the outside of the first end board.
  • the present application provides a battery pack, which includes the battery module described in the first aspect.
  • this application provides a battery module, including:
  • the battery cell module includes a plurality of battery cells, the plurality of battery cells have a side-out pole structure, and the plurality of battery cells are stacked in sequence, with the poles of the battery core facing the side wall of the battery module;
  • FPC FPC is set on the side of the battery module with the pole
  • the BMU slave board is fixed on the first end plate of the battery module and is located on the side away from the battery module.
  • the BMU slave board is provided with a plug-in interface.
  • the PFC extends towards the BMU slave board, and the end of the FPC A plug connector is provided at the bottom, and the plug connector is inserted into the plug interface.
  • This application provides a battery pack, which has higher safety and higher production efficiency.
  • the present application provides a battery pack, including a box and a battery module of the third aspect.
  • the battery module is installed in the box.
  • Figure 1 is a schematic structural diagram of a battery module provided in Embodiment 1 of the present application.
  • FIG. 2 is a schematic diagram of the cooperation of the battery module, the first end plate and the second end plate provided in Embodiment 1 of the present application;
  • FIG. 3 is a schematic structural diagram of the FPC acquisition board provided in Embodiment 1 of the present application.
  • Figure 4 is a schematic structural diagram of the positive electrode lead copper bar provided in Embodiment 1 of the present application.
  • Figure 5 is a schematic diagram of the cooperation of the side plate, the first end plate and the second end plate provided in Embodiment 1 of the present application;
  • Figure 6 is a schematic structural diagram of the aluminum row assembly provided in Embodiment 1 of the present application.
  • Figure 7 is a schematic structural diagram of the exhaust valve provided in Embodiment 1 of the present application.
  • FIG. 8 is an exploded schematic diagram of the battery module provided by this application without showing the side panels and protective cover;
  • FIG. 9 is a schematic structural diagram of the battery module provided by this application without showing the side panels;
  • FIG. 10 is a partial structural schematic diagram of the FPC and bus bracket provided by this application.
  • Figure 11 is a schematic structural diagram of the FPC, first insulating board and second insulating board provided by this application;
  • FIG 12 is a schematic structural diagram of the battery module provided by this application.
  • 1-Battery module 2-Side plate; 3-First end plate; 4-Second end plate; 5-FPC collection plate; 6-FPC support frame; 7-Connection part; 8-Bending part; 9- Bus bar; 10-bus bar bracket; 11-first insulating component; 12-second insulating component; 13-positive lead copper bar; 14-heat insulation plate; 15-exhaust valve; 16-insulating film layer; 17- Hot melt column; 18-BMU slave board; 19-negative lead copper bar; 200-FPC; 210-first FPC section; 211-hot melting point; 220-second FPC section; 230-third FPC section; 231-insert Connector; 410-plug interface; 610-first insulating plate; 620-second insulating plate; 700-protective cover; 201-fixing part.
  • the term “above” or “below” a first feature on a second feature may include direct contact between the first and second features, or may also include the first and second features. No Not in direct contact but through other characteristic contacts between them.
  • the terms “above”, “above” and “above” a first feature on a second feature include the first feature being directly above and diagonally above the second feature, or simply mean that the first feature is higher in level than the second feature.
  • “Below”, “under” and “under” the first feature is the second feature includes the first feature being directly below and diagonally below the second feature, or simply means that the first feature is less horizontally than the second feature.
  • the present application provides a battery module, including a battery module 1, a side plate 2, a first end plate 3, a second end plate 4, a BMU slave board 18, a lead copper bar and an FPC collection board 5.
  • the side plates 2 are located on both sides of the battery module 1 , and the first end plate 3 and the second end plate 4 are respectively located at both ends of the battery module 1 .
  • the BMU slave board 18 is integrated on the side surface of the first end plate 3 away from the battery module 1 .
  • the lead-out copper bar includes a positive lead-out copper bar 13 and a negative lead-out copper bar 19 .
  • the positive lead-out copper bar 13 and the negative lead-out copper bar 19 are respectively disposed at both ends of the battery module 1 .
  • a first insulating component 11 is disposed between the battery module 1 and the first end plate 3 to insulate the battery module 1 and the negative lead copper bar 19 .
  • a second insulating component 12 is disposed between the battery module 1 and the second end plate 4 to insulate the battery module 1 and the positive lead copper bar 13 .
  • the FPC collection board 5 includes a bending part 8 and a connecting part 7.
  • the connecting part 7 extends between the battery module 1 and the side plate 2.
  • the bending part 8 passes through the first insulating component 11 and bends and extends to the first end.
  • the outside of board 3 is connected to BMU slave board 18 .
  • the FPC collection board 5 is connected inside the battery module, and the first insulation component 11 can prevent the FPC collection board 5 from contacting the first end plate 3 .
  • the positive electrode lead-out copper bar 13 is arranged in the second insulating component 12.
  • the BMU slave board 18 is integrated on the battery module. When connected in series in the PACK, it can save the space of the wiring harness. This is mainly because the battery module with the BMU slave board 18 only needs two wires when connected at low voltage. At the same time, the voltage acquisition and temperature acquisition of the battery module are directly connected to the BMU slave board 18 on the battery module through the FPC acquisition board 5, which facilitates the connection inside the PACK.
  • the battery core module 1 includes at least two battery cores arranged in sequence, and poles are independently provided on both sides along the length direction of the battery cores.
  • the batteries in this application all have poles on both sides.
  • the temperature collection and voltage collection of the battery module are distributed on both sides.
  • the FPC collection board 5 is connected inside the battery module and protected by insulating parts. , can avoid affecting the contact between the battery core and the liquid cooling plate, and improve the cooling efficiency of the battery module.
  • exhaust valves 15 are respectively provided on one side of the battery core close to the side plate 2 .
  • a fixing portion bent toward the side close to the battery module 1 is provided along the outer edge of the side plate 2 .
  • the fixing portion is configured to be welded and fixed to the first end plate 3 and the second end plate 4 respectively.
  • the outer edges of the side plates 2 are all bent fixing parts, and the cross section of the side plates 2 has a "C" shape structure.
  • the upper and lower fixed parts of the side plate 2 are respectively close to the battery module 1 and are bonded and fixed to provide a certain extrusion force in the direction of battery expansion and increase the strength and modality of the module.
  • the fixed part at the left end of the side plate 2 and the first end plate 3 are fixed by laser welding, and the fixed part at the right end of the side plate 2 and the second end plate 4 are fixed by laser welding. There is no need for a bottom shell or an upper cover, which is conducive to realizing a double layer. Liquid cooled.
  • the first insulating component 11 includes a first insulating plate and a second insulating plate.
  • the first insulating plate and the second insulating plate are respectively disposed on both sides of the bent portion 8 of the FPC collection plate 5 .
  • the outer surface of the bent portion 8 extending out of the first end plate 3 is also provided with a protective cover.
  • the FPC acquisition board 5 in this application is directly plugged into the BMU slave board 18 through a connector, and is insulated through a protective cover to prevent damage to the FPC acquisition board 5 during the installation process, and to prevent condensation from damaging the insulation. Impact.
  • the second insulation component 12 includes a third insulation plate and a fourth insulation plate.
  • the third insulating plate is disposed between the positive lead copper bar 13 and the second end plate 4
  • the fourth insulating plate is disposed between the positive lead copper bar 13 and the battery module 1 .
  • the positive lead copper bar 13 in this application is disposed between the third insulating plate and the fourth insulating plate, forming a "sandwich" structure to prevent the positive lead copper bar 13 from contacting the battery module 1, and the third insulating plate and the second terminal
  • the plate 4 is bonded and fixed, and the fourth insulating plate fully covers the positive lead copper bar 13 to ensure the electrical clearance and creepage distance.
  • the battery module further includes aluminum row assemblies located on both sides of the cell module 1 .
  • the aluminum bus assembly includes a busbar bracket 10 and at least two busbars 9 .
  • the busbar bracket 10 is configured to support the busbars 9 .
  • the busbars 9 are arranged in series, and the busbars 9 are respectively connected to the poles of the battery cells.
  • the busbar bracket 10 is disposed between the side plate 2 and the battery module 1 , and the busbars 9 are respectively fixed on the side surface of the busbar bracket 10 away from the battery module 1 .
  • the busbar 9 is fixed on the busbar bracket 10 through hot melt posts 17 .
  • the battery module further includes an FPC support frame 6 , and the FPC support frame 6 is configured to support the FPC collection board 5 .
  • the FPC support frame 6 is arranged between the FPC collection board 5 and the busbar 9 .
  • the FPC support frame 6 in this application plays an insulating role, and the FPC support frame 6 prevents the FPC collection board 5 from contacting the busbar 9 .
  • a heat insulation plate 14 is also provided between the busbar bracket 10 and the side plate 2 .
  • At least two first exhaust holes are opened side by side on the surface of the side plate 2 .
  • At least two second exhaust holes are opened side by side on the surface of the heat insulation board 14 .
  • At least two third exhaust holes are opened side by side on the surface of the busbar bracket 10 .
  • the first exhaust hole, the second exhaust hole and the third exhaust hole correspond to the exhaust valve 15 one-to-one.
  • An insulating film layer 16 is also provided on the surface of the side plate 2 close to the heat insulation plate 14 .
  • the thermal runaway of the battery module is solved by arranging the first exhaust hole, the second exhaust hole and the third exhaust hole, which are sequentially corresponding to the exhaust valve 15 of the battery core.
  • the insulation panels 14 are mica sheets.
  • the heat insulation board 14 in this application uses mica sheets, which can play a role in heat insulation. When a cell in the cell module 1 erupts out of thermal control, it can prevent the backflow of hot gas from affecting other adjacent cells, and at the same time, it can ensure Integrity of side panels 2.
  • the present application provides a battery pack, including the battery module in an embodiment.
  • the battery pack further includes a first liquid cooling plate and a second liquid cooling plate.
  • the first liquid cooling plate and the second liquid cooling plate are respectively adhesively connected to opposite side surfaces of the battery module 1 .
  • a first thermally conductive adhesive layer is provided between the first liquid cooling plate and the battery module 1 .
  • a second thermally conductive adhesive layer is provided between the second liquid cooling plate and the battery module 1 .
  • the battery core of the battery module has poles on both sides, without a bottom case and an upper cover.
  • the upper and lower ends of the battery module 1 are in contact with the liquid cooling plate through a thermally conductive adhesive layer, which improves the cost.
  • the battery module efficiency is optimized, the heat conduction path is optimized, the cooling efficiency is improved, and double-layer cooling is achieved, which effectively reduces the temperature difference of the battery module and helps extend the life of the battery core.
  • the battery module includes a battery module 1, a side plate 2, a first end plate 3, a second end plate 4, a BMU slave board 18, Lead out the copper busbar, FPC collection board 5, FPC support frame 6, aluminum busbar assembly and heat insulation board 14.
  • An aluminum row assembly, an FPC collection plate 5, a heat insulation plate 14 and a side plate 2 are arranged on both sides of the battery module 1 from the inside to the outside.
  • the first end plate 3 and the second end plate 4 are respectively located on both sides of the battery module 1. end.
  • the BMU slave board 18 is integrated on the side surface of the first end plate 3 away from the battery module 1 .
  • the lead-out copper bars include a positive lead-out copper bar 13 and a negative lead-out copper bar 19 respectively provided at both ends of the battery module 1 .
  • a first insulating component 11 is disposed between the battery module 1 and the first end plate 3 .
  • the first insulating component 11 insulates the battery module 1 and the negative lead copper bar 19 .
  • a second insulating component 12 is disposed between the battery module 1 and the second end plate 4 to insulate the battery module 1 and the positive lead copper bar 13 .
  • the FPC collection board 5 includes a bending part 8 and a connecting part 7.
  • the connecting part 7 extends between the battery module 1 and the side plate 2.
  • the bending part 8 passes through the first insulating component 11 and is bent.
  • the fold extends to the outside of the first end plate 3 and is plugged into the BMU slave plate 18 through a plug connector.
  • the first insulating component 11 includes a first insulating plate and a second insulating plate.
  • the first insulating plate and the second insulating plate are respectively disposed on both sides of the bent portion 8 of the FPC collection plate 5 .
  • the bent portion 8 extends out of the first end plate 3
  • the outer surface is also provided with a protective cover.
  • the second insulating component 12 includes a third insulating plate and a fourth insulating plate.
  • the third insulating plate is disposed between the positive lead-out copper bar 13 and the second end plate 4 .
  • the fourth insulating plate is disposed between the positive lead-out copper bar 13 and the second end plate 4 .
  • the fourth insulating plate fully covers the positive lead-out copper bar 13 to ensure electrical clearance and creepage distance.
  • the battery module 1 includes battery cells arranged in sequence.
  • the battery cells have poles on both sides.
  • the temperature collection and voltage collection of the battery module are distributed on both sides.
  • the FPC collection board 5 is connected inside the battery module. .
  • An exhaust valve 15 is respectively provided on the side of the battery core close to the side plate 2 .
  • a fixing portion is provided along the outer edge of the side plate 2 and bent toward the side close to the battery module 1.
  • the upper and lower fixing portions of the side plate 2 are respectively close to the battery module 1 for bonding. Fixed, in the expansion direction of the battery core, it can provide a certain extrusion force and increase the strength and modality of the module.
  • the fixed part at the left end of the side plate 2 and the first end plate 3 are fixed by laser welding, and the fixed part at the right end of the side plate 2 and the second end plate 4 are fixed by laser welding.
  • the aluminum bus assembly includes a busbar bracket 10 and a plurality of busbars 9 corresponding to the battery cells.
  • the busbar bracket 10 is disposed between the side plate 2 and the battery module 1.
  • the busbars 9 are respectively heated by The melting post 17 is fixed on the side surface of the busbar bracket 10 away from the battery module 1 .
  • the busbars 9 are arranged in series, and the busbars 9 are respectively connected to the poles of the battery cells.
  • the FPC support frame 6 is configured to support the FPC collection board 5 and is disposed between the FPC collection board 5 and the bus bar 9 to play an insulating role.
  • the FPC support frame 6 prevents the FPC collection board 5 from contacting the bus bar 9 .
  • first exhaust holes are arranged side by side on the surface of the side plate 2
  • second exhaust holes are arranged side by side on the surface of the heat insulation panel 14
  • third exhaust holes are arranged side by side on the surface of the busbar bracket 10 .
  • the first exhaust hole, the second exhaust hole and the third exhaust hole are in one-to-one correspondence with the exhaust valve 15 of the battery core, which can effectively solve the thermal runaway of the battery module.
  • the heat-insulating plate 14 is a mica sheet, and an insulating film layer 16 is also provided on the surface of the side plate 2 close to the heat-insulating plate 14 .
  • the insulating film layer 16 can melt quickly when thermal runaway is triggered, so that the gas can be discharged quickly. Under normal operating conditions, the insulating film layer 16 can play a sealing role to prevent short circuits.
  • This embodiment provides a battery pack, which includes a first liquid cooling plate, a second liquid cooling plate and a battery module.
  • the structure and working principle of the battery module are the same as those in Embodiment 1, and will not be described again here.
  • the first liquid cooling plate and the second liquid cooling plate are respectively adhesively connected to the upper and lower surfaces of the battery module 1 , and a first thermally conductive adhesive layer is provided between the first liquid cooling plate and the battery module 1 .
  • a second thermally conductive adhesive layer is provided between the second liquid cooling plate and the battery module 1 .
  • the cells of the battery module have poles on both sides.
  • the temperature collection and voltage collection of the battery module are distributed on both sides.
  • the FPC collection board 5 is rotated inside the battery module. connection, and use insulating parts for protection, which is beneficial to the contact between the battery core and the liquid cooling plate, and improves the cooling efficiency of the battery module.
  • the outer edges of the battery module side plates 2 are bent fixing parts, which are bonded and fixed with the battery module 1 and simultaneously welded and fixed with the first end plate 3 and the second end plate 4 at both ends of the battery module 1 , in the direction of cell expansion, it can provide a certain extrusion force and increase the strength and modality of the module.
  • the upper and lower ends of the cell module 1 pass through a thermal conductive adhesive layer and a liquid cooling plate respectively. Contact, improve the grouping rate, optimize the heat conduction path, achieve double-layer cooling, effectively reduce the temperature difference of the battery module, and help extend the life of the battery core.
  • This application provides a battery module and battery pack. There are poles on both sides of the battery core in the battery module, and temperature and voltage collection are distributed on both sides, without affecting the contact between the battery core and the liquid cooling plate.
  • the FPC acquisition board is internally connected to the battery module, which improves the efficiency of the module series and parallel connection.
  • the battery module comes with a BMU slave board, which reduces the space for the module series wiring harness.
  • the FPC acquisition board is directly connected to the BMU slave board, which has Conducive to improving efficiency;
  • the battery pack provided by this application has no bottom case and upper cover.
  • the battery module directly contacts the liquid cooling plate through thermal conductive glue to achieve double-layer cooling, optimize the thermal conduction path, and improve the assembly rate.
  • This embodiment provides a battery module that can not only improve the heat dissipation efficiency of the battery core, but also realize the assembly of BMU and FPC at the battery module level.
  • the battery module includes battery module 1, FPC200 and BMU From the board 18, the battery module 1 includes a plurality of cells.
  • the plurality of cells have a side-out pole structure.
  • the plurality of cells are stacked in sequence.
  • the poles of the cells face the side wall of the battery module.
  • the FPC 200 is arranged on the battery module.
  • the core module 1 has one side of the pole, and a first end plate 3 is provided at the end of the battery module.
  • the BMU slave plate 18 is fixed on the first end plate 3 of the battery module and is located away from the battery module 1 On one side, the BMU slave board 18 is provided with a plug-in interface 410.
  • the FPC 200 extends toward the BMU slave board 18, and an end of the FPC 200 is provided with a plug-in connector 231.
  • the plug-in connector 231 is inserted into the plug-in interface 410.
  • the BMU slave plate 18 and the first end plate 3 are fixedly connected through bolts. In other embodiments, the BMU slave plate 18 and the first end plate 3 can also be fixedly connected through snapping or other methods.
  • the poles of multiple cells in the cell module 1 are set toward the side wall of the battery module, and the FPC 200 is set on the side of the cell module 1 with the poles, making the battery module more applicable.
  • the battery pack structure is based on top cooling or bottom cooling. For example, when the cooling plate in the battery pack is installed on the top or bottom of the battery module, the heat emitted by the battery core can be directly transferred to the cooling plate without passing through the FPC200.
  • the FPC 200 is not required to block the heat transfer, which effectively improves the efficiency of heat transfer between the cooling plate and the battery module, thereby improving the heat dissipation efficiency of the cells in the battery module 1; on the other hand, the battery provided by this embodiment
  • the module fixes the BMU slave plate 18 on the first end plate 3 of the battery module and away from the side of the battery module 1, so that the BMU slave plate 18 is fixedly connected to the first end plate 3 at the battery module level.
  • the assembly of the BMU slave board 18 and the FPC 200 is realized, which eliminates the trouble of assembling the BMU slave board 18 and the FPC 200 in the battery box, greatly simplifies the assembly process of the battery pack, and has the effect of improving production efficiency.
  • the battery module also includes a busbar and a busbar bracket 10.
  • the busbar bracket 10 is fixed to the side of the battery module 1 with the pole (ie, the side of the battery module). wall), the busbar bracket 10 is provided with an escape hole, the busbar is electrically connected to the pole through the escape hole, and the FPC200 is fixed on the busbar bracket 10, thereby achieving the fixation of the FPC200.
  • the busbar can be made of conductive metal materials such as copper or aluminum.
  • the battery module also includes an isolation plate (not shown in the figure).
  • the isolation plate is arranged between the FPC 200 and the busbar.
  • the FPC 200 is provided with a plurality of thermal melting points 211 to isolate Itawa
  • the FPC 200 is fixed on the bus bracket 10 at multiple heat melting points 211 through heat fusion, and the isolation plate is provided to improve the overall structural strength of the FPC 200 .
  • the isolation board is made of insulating material.
  • the isolation board can be an FR-4 isolation board or an FR-5 isolation board.
  • the material selection and preparation process of the isolation board are relatively mature related technologies in this field. , no further details will be given here.
  • the outer surface of FPC200 is covered with an insulating film, thereby realizing the insulation between FPC200 and battery module 1.
  • selecting an isolation board with insulating properties can improve the relationship between FPC200 and battery module 1. 1 insulation effect.
  • the battery module also includes a BMS, and the BMS is connected with the BMU slave board 18 via signals, so that the FPC 200 can transmit the collected temperature data and voltage data to the BMS through the BMU slave board 18 .
  • the battery module also includes an insulating plate.
  • the insulating plate is sandwiched between the first end plate 3 and the battery module 1.
  • the insulating plate is made of insulating material, thereby achieving The insulation effect between the first end plate 3 and the battery module 1.
  • the insulating board can be made of polyvinyl chloride or epoxy resin. The material selection and preparation process of the insulating board are relatively mature related technologies in this field and will not be described again here.
  • the insulating plate includes a first insulating plate 610 and a second insulating plate 620
  • the FPC 200 includes a first FPC section 210 , a second FPC section 220 and a third FPC section 230
  • the first FPC section 210 is arranged on the side wall of the battery module 1 and is fixedly connected to the busbar bracket 10
  • the second FPC section 220 is fixed to the third FPC section 210 .
  • the plug connector 231 is provided at the end of the third FPC section 230, and the plug connector 231 bypasses the first end plate 3 from above and is inserted into the plug port 410.
  • the two end surfaces of the second FPC segment 220 are bonded and fixed with the first insulating plate 610 and the second insulating plate 620 respectively, so as to improve the fixation of the second FPC segment 220 between the first insulating plate 610 and the second insulating plate 620 .
  • Stability between the second insulating plates 620 can also be fixed between the first insulating plate 610 and the second insulating plate 620 in other ways. For example, Fixing is achieved through clamping or hot melting, etc., which are not listed here.
  • the second FPC section 220, the first insulating plate 610 and the second insulating plate 620 can be assembled first, that is, the second FPC section 220 can be assembled first.
  • the two end surfaces are bonded and fixed to the first insulating plate 610 and the second insulating plate 620 respectively, and then the first FPC section 210 and the bus bracket 10 and the third FPC section 230 and the first end plate 3 are assembled.
  • the battery module also includes a protective cover 700.
  • the protective cover 700 is buckled on the BMU slave board 18 and the first end plate 3 to form a protective cavity.
  • the third FPC section 230 is placed in the protection cavity to form a protective effect on the third FPC segment 230 to avoid damage to the third FPC segment 230 due to bumps and other reasons during transportation.
  • the The battery module 1 emits heat and the ambient temperature inside the battery box rises. Under the cooling effect of the cooling plate, the moisture in the high-temperature air inside the battery box will condense to form condensation and adhere to the inner wall of the battery box.
  • FIG. 12 is a schematic structural diagram when the protective cover 700 is not buckled on the BMU slave board 18 and the first end board 3 .
  • the battery module also includes a side plate 2, which is fixed on the side wall of the battery module 1, the first FPC section 210, the busbar bracket 10 and the isolation plate are located between the side plate 2 and the battery module 1.
  • the setting of the side plate 2 realizes the protection of the first FPC section 210 and avoids the problem of collision of the first FPC section 210 during transportation, and the battery The problem of condensation inside the box dripping onto the first FPC section 210.
  • the above-mentioned structure of fixing the second FPC section 220 between the first insulating plate 610 and the second insulating plate 620 avoids the problem of collision of the second FPC section 220 during transportation and condensation in the battery box. Problem dripping onto the second FPC segment 220.
  • the plurality of cells in the cell module 1 have a side-out pole structure.
  • the FPC200 is set on the side of the battery module 1 with the pole.
  • the battery module can control the temperature and voltage of the battery module 1.
  • the voltage control is more precise; after the battery module is installed into the battery box, if condensation occurs in the battery box, the battery module can also prevent condensation from dripping onto the FPC200, which plays a very good role in the insulation effect of the FPC200.
  • the protection function ultimately improves the safety of the battery module.
  • This embodiment also provides a battery pack, which has higher safety and higher production efficiency.
  • the battery pack includes a battery box and the above-mentioned battery module.
  • the battery module is installed in the box.
  • the battery uses the above-mentioned battery module, and the cells in the battery module 1 have high heat dissipation efficiency. , greatly reducing thermal runaway caused by excessive temperature of the battery module 1, effectively improving the safety of the battery pack.
  • the BMU of the battery pack is fixed on the battery module, which enables the assembly of the BMU and FPC outside the battery box, simplifying the assembly process of the battery pack, thereby improving the production efficiency of the battery pack.
  • the battery pack also includes a cooling plate.
  • the cooling plate is installed in the box, and the cooling plate is arranged on at least one of the top and bottom of the battery module 1.
  • the cooling plate and the battery module 1 are bonded by thermally conductive adhesive. , the heat emitted by the battery module 1 can be directly transferred to the cooling plate through the thermal conductive glue to achieve the heat dissipation effect of the batteries in the battery module 1.
  • the poles of the plurality of cells in the cell module are arranged toward the side wall of the battery module, and the FPC is arranged on the side of the cell module with the poles, so that the battery module can be more It is suitable for top cooling or bottom cooling battery pack structures. Specifically, when the cooling plate in the battery pack is installed on the top or bottom of the battery module, the heat emitted by the battery core can be directly transferred to the cooling plate without any cooling.
  • the provided battery module fixes the BMU slave board on the first end plate of the battery module and away from the side of the battery module, so that the BMU slave board is fixedly connected to the first end plate, and the BMU can be realized at the battery module level.
  • the assembly with FPC eliminates the trouble of assembling the BMU and FPC in the battery box, greatly simplifies the assembly process of the battery pack, and has the effect of improving production efficiency.
  • the battery pack provided by the utility model adopts the above-mentioned battery module, and the cells in the battery module have high heat dissipation efficiency, which greatly reduces the problem of thermal runaway caused by excessive temperature of the battery module, and effectively improves the efficiency of thermal runaway. improve the safety of the battery pack.
  • the BMU of the battery pack is fixed on the battery module, which enables the BMU and FPC to be assembled outside the battery box, simplifying the assembly process of the battery pack, thereby improving the production efficiency of the battery pack.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Battery Mounting, Suspending (AREA)

Abstract

La présente invention concerne un module de batterie et un bloc-batterie. Le module de batterie comprend un module d'éléments de batterie, des plaques latérales, une première plaque d'extrémité, une seconde plaque d'extrémité, une carte esclave BMU, une barre de cuivre de sortie et des cartes d'acquisition FPC ; les plaques latérales sont situées sur deux côtés du module d'éléments de batterie ; la première plaque d'extrémité et la seconde plaque d'extrémité sont respectivement situées au niveau de deux extrémités du module d'éléments de batterie ; la carte esclave BMU est intégrée sur la surface latérale de la première plaque d'extrémité à l'opposé du module d'éléments de batterie ; la barre de cuivre de sortie comprend une barre de cuivre de sortie d'électrode positive et une barre de cuivre de sortie d'électrode négative qui sont respectivement agencées au niveau de deux extrémités du module d'éléments de batterie ; un premier module d'isolation est disposé entre le module d'éléments de batterie et la première plaque d'extrémité ; un second module d'isolation est disposé entre le module d'éléments de batterie et la seconde plaque d'extrémité ; la carte d'acquisition FPC comprend des parties courbées et des parties de connexion ; les parties de connexion s'étendent entre le module d'éléments de batterie et les plaques latérales ; les parties courbées passent à travers le premier module d'isolation et sont ensuite courbées pour s'étendre vers le côté externe de la première plaque d'extrémité à connecter à la carte esclave BMU.
PCT/CN2023/111867 2022-08-09 2023-08-09 Module de batterie et bloc-batterie WO2024032641A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
CN202210948912.6 2022-08-09
CN202210948912.6A CN115241612B (zh) 2022-08-09 2022-08-09 一种电池模组及电池包
CN202223039038.9U CN218939920U (zh) 2022-11-15 2022-11-15 电池模组及电池包
CN202223039038.9 2022-11-15

Publications (1)

Publication Number Publication Date
WO2024032641A1 true WO2024032641A1 (fr) 2024-02-15

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CN214542436U (zh) * 2021-04-21 2021-10-29 苏州清陶新能源科技有限公司 一种电池模组及电池包
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CN216958413U (zh) * 2021-11-29 2022-07-12 江苏正力新能电池技术有限公司 一种电池模组和电池包
WO2022156083A1 (fr) * 2021-01-21 2022-07-28 江苏正力新能电池技术有限公司 Module de batterie pour empêcher la diffusion thermique et bloc-batterie
CN115241612A (zh) * 2022-08-09 2022-10-25 天津市捷威动力工业有限公司 一种电池模组及电池包
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CN111599955A (zh) * 2019-03-22 2020-08-28 骆驼集团新能源电池有限公司 一种无模组类铝壳电池模组及铝壳电池
WO2021072726A1 (fr) * 2019-10-18 2021-04-22 淄博火炬能源有限责任公司 Module de batterie lithium-ion pour chariot élévateur à fourche électrique et boîtier d'alimentation électrique
CN211785979U (zh) * 2019-12-17 2020-10-27 深圳市国威科创新能源科技有限公司 一种单面无线式采集模组
WO2022156083A1 (fr) * 2021-01-21 2022-07-28 江苏正力新能电池技术有限公司 Module de batterie pour empêcher la diffusion thermique et bloc-batterie
CN214542436U (zh) * 2021-04-21 2021-10-29 苏州清陶新能源科技有限公司 一种电池模组及电池包
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CN216958413U (zh) * 2021-11-29 2022-07-12 江苏正力新能电池技术有限公司 一种电池模组和电池包
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CN218939920U (zh) * 2022-11-15 2023-04-28 天津市捷威动力工业有限公司 电池模组及电池包

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