WO2022110189A1 - 电池组、电池包和用电装置 - Google Patents

电池组、电池包和用电装置 Download PDF

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Publication number
WO2022110189A1
WO2022110189A1 PCT/CN2020/132889 CN2020132889W WO2022110189A1 WO 2022110189 A1 WO2022110189 A1 WO 2022110189A1 CN 2020132889 W CN2020132889 W CN 2020132889W WO 2022110189 A1 WO2022110189 A1 WO 2022110189A1
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WO
WIPO (PCT)
Prior art keywords
battery pack
cell
mounting bracket
battery
conductive member
Prior art date
Application number
PCT/CN2020/132889
Other languages
English (en)
French (fr)
Inventor
周权
吴明杰
莫胜
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 CN202080102348.5A priority Critical patent/CN116097509A/zh
Priority to PCT/CN2020/132889 priority patent/WO2022110189A1/zh
Publication of WO2022110189A1 publication Critical patent/WO2022110189A1/zh

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
    • 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
    • H01M50/289—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by spacing elements or positioning means within frames, racks or packs
    • H01M50/291—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by spacing elements or positioning means within frames, racks or packs characterised by their shape
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • the present application relates to the field of batteries, and in particular, to a battery pack, a battery pack having the battery pack, and an electrical device having the battery pack.
  • the tabs of a plurality of cells in a battery pack are often directly connected, and the battery pack lacks a structure for fixing the tabs and their connectors, and the circuit board is also directly arranged on one side of the battery pack and Connect with multiple tabs.
  • the tabs, circuit boards and other structures will also shake, which may easily lead to a short circuit in the battery pack.
  • the present application provides a battery pack, a battery pack with the battery pack, and an electrical device with the battery pack.
  • a mounting bracket By setting the mounting bracket, a plurality of tabs, conductive parts and circuit boards of the battery pack are arranged on the The mounting bracket stabilizes the connection positions between the multiple tabs, the conductive parts and the circuit board, and reduces the problem of short circuit in the battery pack caused by vibration.
  • Embodiments of the present application provide a battery pack including a first cell assembly and a second cell assembly in a housing.
  • the casing includes a first casing and a mounting bracket, and the first casing is provided with a receiving space.
  • the first cell assembly and the second cell assembly are arranged in the receiving space.
  • the first cell assembly includes a plurality of stacked first cells, the first cell includes a first positive electrode lug and a first negative electrode lug, and between the adjacent first battery cells, the first positive electrode lug. connected to the first negative tab.
  • the second cell assembly includes a plurality of stacked second cells, the second cell includes a second positive electrode tab and a second negative electrode tab, and between adjacent second cells, the second positive electrode tab connected to the second negative tab.
  • the mounting bracket is provided with a plurality of first through holes and a plurality of second through holes, and the first positive electrode tabs and the first negative electrode tabs of the adjacent first battery cells respectively extend from the two adjacent first through holes.
  • the second positive tab and the second negative tab of the adjacent second cell respectively protrude from the two adjacent second through holes and connect with the mounting bracket. external surface connection.
  • the battery pack further includes a first conductive member, the first conductive member includes a first welding part and a second welding part, the first welding part is connected to the first positive electrode tab and the first negative electrode tab that are connected to each other, so the The second welding part is connected to the second positive electrode tab and the second negative electrode tab which are connected to each other.
  • the first conductive member includes a first connection portion connecting the first welding portion and the second welding portion, and the first welding portion and the second welding portion are exposed on the The outer surface of the mounting bracket, the first welding part is welded to at least one of the interconnected first positive electrode lugs and the first negative electrode lugs, and the second welding part is welded to at least one of the interconnected second positive electrode lugs and the second negative electrode lugs.
  • the mounting bracket is made of resin material, and the first conductive member is embedded and fixed with the mounting bracket.
  • the battery assembly further includes a circuit board and a plurality of second conductive members, the circuit board is fixed to the mounting bracket, and one end of the second conductive member is connected to the first conductive member, so The other end of the second conductive member is connected to the circuit board.
  • the first conductive member is located between the circuit board and the mounting bracket.
  • the second conductive member includes a first connection part, a buffer part and a second connection part, the buffer part connects the first connection part and the second connection part, the first connection part The second connection portion is welded to the circuit board, and the second connection portion is welded to the first conductive member.
  • the outer surface of the mounting bracket is further provided with a plurality of limit members, and along the stacking direction of the first battery cells, the first conductive member is disposed on two adjacent limit members between.
  • the outer surface of the mounting bracket is further provided with a first positioning member, the first conductive member is provided with a first positioning hole, and the first positioning member is provided in the first positioning hole.
  • a heat dissipation port is further provided between the adjacent first through holes and the adjacent second through holes.
  • the mounting bracket is further provided with a first support member and a second support member, the first support member is used to support the first positive electrode ear of the outermost first battery cell, and the second support member The piece is used to support the second negative tab of the outermost second battery cell.
  • the mounting bracket further includes a first positioning portion and a second positioning portion adjacent to the inner surface of the cell assembly, and the first positioning portion is disposed between adjacent first through holes, The second positioning portion is arranged between the adjacent second through holes.
  • the first housing is provided with a plurality of first accommodating cavities and a plurality of second accommodating cavities, each of the first accommodating cavities is provided with at least one of the first batteries, and each of the first accommodating cavities is provided with at least one of the first battery cells. At least one of the second battery cells is arranged in the second receiving cavity.
  • a first concave portion is disposed at the bottom of the first receiving cavity
  • a second concave portion is disposed at the bottom of the second receiving cavity
  • the first concave portion and the second concave portion are used for receiving A resin layer, the first battery core and the second battery core are bonded and fixed to the first casing after the resin layer is fixed.
  • the side wall of the first accommodating cavity is provided with a first profile groove
  • the side wall of the second accommodating cavity is provided with a second profile groove
  • the side edge of the first cell accommodates In the first profiling groove
  • the side edge of the second cell is accommodated in the second profiling groove.
  • Embodiments of the present application further provide a battery pack, including a casing and the battery pack according to any one of the above, wherein the battery pack is accommodated in the casing.
  • Embodiments of the present application also provide an electrical device, including the battery pack
  • the above-mentioned battery pack is provided with a mounting bracket, and the plurality of tabs, conductive parts and circuit boards of the battery pack are arranged on the mounting bracket, so that the connection position between the plurality of tabs, conductive parts and the circuit board is stable, and the damage caused by vibration is reduced. Short circuit in the battery pack.
  • FIG. 1 is a schematic three-dimensional structure diagram of a battery pack in an embodiment.
  • FIG. 2 is a schematic diagram of an exploded structure of the battery pack shown in FIG. 1 .
  • FIG. 3 is a schematic three-dimensional structural diagram of the mounting bracket in the battery pack shown in FIG. 1 .
  • FIG. 4 is a schematic three-dimensional structure diagram of the mounting bracket shown in FIG. 3 in another direction.
  • FIG. 5 is a schematic three-dimensional structural diagram of the first casing in the battery pack shown in FIG. 1 .
  • FIG. 6 is a schematic structural diagram of the first casing shown in FIG. 5 after the structure of the sheared part.
  • FIG. 7 is a schematic diagram of an exploded structure of a battery pack in an embodiment.
  • FIG. 8 is a schematic three-dimensional structural diagram of a cell assembly in the battery pack shown in FIG. 7 .
  • FIG. 9 is a schematic diagram of an exploded structure of the cell assembly shown in FIG. 8 .
  • FIG. 10 is a top view of the cell assembly in the battery pack shown in FIG. 7 .
  • FIG. 11 is a schematic three-dimensional structure diagram of a cell assembly in an embodiment.
  • FIG. 12 is a schematic diagram of an exploded structure of the cell assembly shown in FIG. 11 .
  • FIG. 13 is a schematic three-dimensional structural diagram of a cell assembly in an embodiment.
  • FIG. 14 is a schematic diagram of an exploded structure of the cell assembly shown in FIG. 13 .
  • FIG. 15 is a schematic structural diagram of a battery pack in an embodiment.
  • the first cell 110 The first cell 110
  • An embodiment of the present application provides a battery pack, which includes a first cell assembly and a second cell assembly in a housing.
  • the casing includes a first casing and a mounting bracket, and the first casing is provided with a receiving space.
  • the first cell assembly and the second cell assembly are arranged in the receiving space.
  • the first cell assembly includes a plurality of stacked first cells, the first cell includes a first positive electrode lug and a first negative electrode lug, and between the adjacent first battery cells, the first positive electrode lug. connected to the first negative tab.
  • the second cell assembly includes a plurality of stacked second cells, the second cell includes a second positive electrode tab and a second negative electrode tab, and between adjacent second cells, the second positive electrode tab connected to the second negative tab.
  • the mounting bracket is provided with a plurality of first through holes and a plurality of second through holes, and the first positive electrode tabs and the first negative electrode tabs of the adjacent first battery cells respectively extend from the two adjacent first through holes.
  • the second positive tab and the second negative tab of the adjacent second cell respectively protrude from the two adjacent second through holes and connect with the mounting bracket. external surface connection.
  • the battery pack further includes a first conductive member, the first conductive member includes a first welding part and a second welding part, the first welding part is connected to the first positive electrode tab and the first negative electrode tab that are connected to each other, so the The second welding part is connected to the second positive electrode tab and the second negative electrode tab which are connected to each other.
  • the above-mentioned battery pack is provided with a mounting bracket, and the plurality of tabs and conductive parts of the battery pack are arranged on the mounting bracket, so that the connection position between the plurality of tabs and conductive parts is stable, and the problem of short circuit in the battery pack caused by vibration is reduced.
  • the battery pack 100 includes a cell assembly 10 , a first conductive member 20 , a circuit board 30 , a second conductive member 40 and a housing 50 .
  • the cell assembly 10 includes a first cell assembly 11 and a second cell assembly 12 connected in parallel, the first cell assembly includes a plurality of stacked first cells 110, the second cell assembly Including a plurality of stacked second cells 120, the first cell assembly 11 and the second cell assembly 12 will be described in detail in other figures.
  • the first conductive member 20 is electrically connected to the first cell assembly 11 and the second cell assembly 12 .
  • the first cell assembly 11 and the second cell assembly 12 of the cell assembly 10 are accommodated in the casing 50 .
  • the housing 50 includes a first housing 51 and a mounting bracket 54 , the cell assembly 10 is accommodated in the first housing 51 , and the mounting bracket 54 is disposed at the open end of the first housing 51 .
  • the mounting bracket 54 is made of resin material, the first conductive member 20 and the mounting bracket 54 are embedded and fixed, or the first conductive member 20 is detachably fixed to the mounting bracket 54, and other In an embodiment, the mounting bracket 54 may also be made of other non-conductive materials, and the first conductive member 20 may be fixed on the outer surface of the mounting bracket 54 .
  • the first conductive member 20 includes a first welding part 21 and a second welding part 22, the first welding part 21 and the second welding part 22 are exposed on the outer surface of the mounting bracket 54, and the first welding part 21 and the second welding part 22 are exposed on the outer surface of the mounting bracket 54.
  • the welding part 21 is welded to at least one of the first positive electrode tab 111 and the first negative electrode tab 112 which are connected to each other, and the second welding part 22 is welded to at least one of the second positive electrode tab 121 and the second negative electrode tab 122 that are connected to each other.
  • the first conductive member 20 and the circuit board 30 are both disposed on the outer surface of the mounting bracket 54 , and the first conductive member 20 is located on the circuit board 30 and the mounting bracket 54 between.
  • the circuit board 30 is fixed on the mounting bracket 54 .
  • the casing 50 may further include a cover plate (not shown) disposed on the outer surface of the mounting bracket 54 , and the circuit board 30 is accommodated in the cover plate.
  • the circuit board 30 is a circuit board provided with a battery management system.
  • the first conductive member 20 can be directly welded on the circuit board 30
  • a circuit board 30 is provided with a circuit board connected to the first conductive member 20 .
  • circuit to realize the collection and control of the cell assembly 10, and holes can also be made on the circuit board 30, so that the tabs can pass through the openings, and the positive and negative electrodes can be connected to the outer surface of the circuit board 30 to connect in series. adjacent cells.
  • the mounting bracket 54 is provided with a plurality of first through holes 541 and a plurality of second through holes 542 , which are adjacent to the first positive tab 111 and the first negative tab 112 of the first cell. They respectively protrude from two adjacent first through holes 541 and are connected to the outer surface of the mounting bracket 54 away from the first cell assembly, adjacent to the second positive tab 121 and the second negative electrode of the second cell
  • the ears 122 protrude from two adjacent second through holes 542 respectively, and are connected to the outer surface of the mounting bracket 54 away from the first cell assembly.
  • a heat dissipation port 545 is also provided between the adjacent first through holes 541 and the adjacent second through holes 542 for discharging the battery cells 10 generated during the charging and discharging process. of heat.
  • the mounting bracket 54 is used to fix and support the tabs of the cell assembly 10 , the first conductive member 20 and the circuit board 30 .
  • the first conductive member 20 can be fixed to the mounting bracket 54 by thermal fusion or insert molding, which is beneficial to automated production, or the first conductive member 20 can be detachably fixed to the mounting bracket 54 .
  • the tabs of the first cell and the second cell pass through the first through hole 541 and the second through hole 542 respectively, and the outer surface of the mounting bracket 54 is conducive to providing support for the mounting and fixing of the tab, which is convenient for welding the tab. operate.
  • the circuit board 30 is fixed on the mounting bracket 54 to facilitate the welding and fixing of the second conductive member 40 and the circuit board 30 .
  • the outer surface of the mounting bracket 54 is also provided with a plurality of limiting members 543 and a first positioning member 544 for fixing the installation position of the first conductive member 20 and preventing adjacent first conductive members 20 from contacting each other. short circuit problem.
  • each of the first conductive members 20 is disposed between two adjacent limiting members 543 .
  • the first conductive member 20 is provided with a first positioning hole 24 , and the first positioning member 544 is disposed in the first positioning hole 24 .
  • the first positioning member 544 is disposed between the adjacent limiting members 543.
  • the first positioning member 544 is disposed at other parts of the mounting bracket 54.
  • the first conductive member 20 may also be fixed to the mounting bracket 54 by thermally melting the first positioning member 544 .
  • the mounting bracket 54 is further provided with a first support member 546 and a second support member 547.
  • the first support member 546 is used for supporting the first positive tab 111 of the outermost first cell in the cell assembly 10
  • the second support member 547 is used for supporting the outermost second cell in the cell assembly 10 .
  • the second negative tab 122 is used to connect the overall positive output terminal and the overall negative output terminal of the battery pack 100 .
  • first support 546 and the second support 547 protrude from the outer surface of the mounting bracket 54 , and the first positive tab 111 of the outermost first cell in the cell assembly 10 faces the first A support member 546 is bent, the end of the first support member 546 supports the bent portion of the first positive electrode tab 111 , and the second negative electrode tab 122 of the outermost second cell in the cell assembly 10 faces The second support member 547 is bent, and the end of the second support member 547 supports the bent portion of the second negative electrode tab 122 .
  • the inner surface of the mounting bracket 54 facing the cell assembly 10 has a first positioning portion 548 and a second positioning portion 549 .
  • the first positioning portion 548 is disposed adjacent to the Between the first through holes 541 , the second positioning portion 549 is disposed between the adjacent second through holes 542 .
  • the first positioning portion 548 is disposed between the tabs of the adjacent first cells, and the second positioning portion 549 is disposed between the tabs of the adjacent second cells, so as to reduce the internal space of the cell assembly 10 . short circuit problem.
  • the first housing 51 is provided with a plurality of first accommodating cavities 511 and a plurality of second accommodating cavities 512 .
  • Each of the first accommodating cavity 511 is provided with at least one of the first battery cells
  • each of the second accommodating cavity 512 is provided with at least one of the second battery cells.
  • the side wall of the first receiving cavity 511 is provided with a first profile groove 5112
  • the side wall of the second containing cavity 512 is provided with a second profile groove 5122 .
  • the side of the first cell is accommodated in the first profile groove 5112
  • the side of the second cell is accommodated in the second profile slot 5122 .
  • a first concave portion 5111 is disposed at the bottom of the first receiving cavity 511
  • a second concave portion 5121 is disposed at the bottom of the second receiving cavity 512 .
  • the first concave portion 5111 and the second concave portion 5121 are used to accommodate a resin layer, and after the resin layer is fixed, the first cell and the second cell are bonded and fixed to the first case body.
  • the resin layer includes, but is not limited to, structural glue, potting glue, etc., and can also be poured and filled into the concave portion by melting plastic particles to form the resin layer.
  • the casing 50 includes a first casing 51 , a second casing 52 and a fixing bracket 53 , and the cell assembly 10 is accommodated in the first casing 51 . inside the casing 51 and the second casing 52 .
  • the first cell assembly 11 is accommodated in the first casing 51
  • the second electric core assembly 12 is accommodated in the second casing 52 .
  • the fixing bracket 53 is used for fixing the first cell assembly 11 and the second cell assembly 12 .
  • the first cell assembly 11 and the second cell assembly 12 are disposed on opposite sides of the fixing bracket 53 .
  • a first positioning slot 531 and a second positioning slot 532 are respectively provided on opposite sides of the fixing bracket 53 .
  • one side of the first cell 110 is accommodated in the first cell 110 .
  • a positioning groove 531 , one side of the second cell 120 is accommodated in the second positioning groove 532 .
  • the first cell assembly 11 and the second cell assembly 12 are disposed along the width direction of the first cell assembly 11 .
  • the width direction of the first cell assembly 11 is the direction indicated by arrow A in FIG. 7
  • the first conductive member 20 is electrically connected to the first cell assembly 11 and the second cell assembly 12 .
  • One end of the second conductive member 40 is electrically connected to the first conductive member 20
  • the other end of the second conductive member 40 is electrically connected to the circuit board 30 .
  • the first cell assembly 11 includes a plurality of first cells 110 , and the plurality of first cells 110 are stacked along the thickness direction of the first cells 110 .
  • Each of the first battery cells 110 includes a first positive electrode tab 111 , a first negative electrode tab 112 and a first body portion 113 .
  • the first positive tab 111 and the first negative tab 112 are disposed on the same side of the first body portion 113 , and the first positive tab 111 and the first negative tab 112 extend along the length direction of the first body portion 113 The first main body portion 113 comes out. Between the adjacent first cells 110 , the first positive tab 111 of one first cell 110 is connected to the first negative tab 112 of the other first cell 110 .
  • the second cell assembly 12 includes a plurality of second cells 120 , and a plurality of the second cells 120 are stacked along the thickness direction of the second cells 120 .
  • the stacking direction is the same as the stacking direction of the second cell 120 .
  • the second battery cell includes a second positive electrode tab 121 , a second negative electrode tab 122 and a second body portion 123 .
  • the second positive tab 121 and the second negative tab 122 are disposed on the same side of the second body portion 123 , and the second positive tab 121 and the second negative tab 122 extend along the length direction of the second body portion 123 The second main body portion 123 comes out. Between the adjacent second cells 120 , the second positive tab 121 of one second cell 120 is connected to the second negative tab 122 of another second cell 120 .
  • the width direction of the first cell assembly 11 , the width direction of the second cell assembly 12 , and the width direction of the first cell 110 are the same. Specifically, the width direction of the first cell assembly 11 At the same time, the length direction and the thickness direction of the first cell 110 are perpendicular to each other, and the width direction of the second cell assembly 12 is perpendicular to the length direction and the thickness direction of the first cell 110 at the same time.
  • the direction indicated by arrow B is the length direction of the first cell 110
  • the direction indicated by arrow C is the thickness direction of the first cell 110 .
  • the first conductive member 20 includes a first welding part 21 , a second welding part 22 and a connecting part 23 connecting the first welding part 21 and the second welding part 22 .
  • the first welding portion 21 is welded to the first positive electrode tab 111 and the first negative electrode tab 112 that are connected to each other
  • the second welding portion 22 is welded to the second positive electrode tab 121 and the second negative electrode tab 122 that are connected to each other.
  • the first welding portion 21 is provided between the first positive electrode tab 111 and the first negative electrode tab 112 , and the first welding portion 21 is welded with the first positive electrode tab 111 and the first negative electrode tab 112 , or the first The positive electrode lug 111 is arranged between the first welding part 21 and the first negative electrode lug 112 , the first welding part 21 is welded with the first positive electrode lug 111 , or the first negative electrode lug 112 is arranged on the first welding part 21 and the first positive electrode tab 111 , the first welding part 21 is welded with the first negative electrode tab 112 .
  • the first negative electrode tab 112 is disposed between the first welding portion 21 and the first positive electrode tab 111 , and the first welding portion 21 is welded with the first negative electrode tab 112 .
  • the second welding part 22 is provided between the second positive electrode lug 121 and the second negative electrode lug 122 , and the second welding part 22 is welded with the second positive electrode lug 121 and the second negative electrode lug 122 , or the second positive electrode lug 121 between the second welding part 22 and the second negative electrode lug 122 , the second welding part 22 is welded with the second positive electrode lug 121 , or the second negative electrode lug 122 is arranged on the second welding part 22 and the second positive electrode tab 121 , the second welding part 22 is welded with the second negative electrode tab 122 .
  • the second negative electrode tab 122 is disposed between the second welding portion 22 and the second positive electrode tab 121 , and the second welding portion 22 is welded with the second negative electrode tab 122 .
  • the first cell 110 and the second cell 120 are soft-wrapped cells. Between the adjacent first cells 110 , the first positive tab 111 of one first cell 110 and the first negative tab 112 of the other first cell 110 are stacked and welded, adjacent to the second cell 120 In between, the second positive tab 121 of one second cell 120 and the second negative tab 122 of the other second cell 120 are stacked and welded. In another embodiment of the present application, the first cell assembly 11 and the second cell assembly 12 may also be disposed along the stacking direction of the first cell 110 .
  • the first battery cell 110 and the second battery cell 120 are connected in parallel to form a circuit unit through the first conductive member 20, and then connected in series with an adjacent group of circuit units.
  • the voltages of the first cell 110 and the second cell 120 in parallel are inconsistent, the voltage of the first cell 110 and the second cell 120 will have a circulating current, and the direction of the circulating current is from the higher voltage cell.
  • the first battery cell 110 and the second battery cell 120 can be charged and discharged in the same amount during use, reducing the problem that a single battery cell cannot be fully charged or the remaining power cannot be used due to unbalanced voltage, and improving the battery cell Improve the cycle performance and improve the service life of the battery.
  • the battery pack 100 balances the voltages of the plurality of first cells 110 and the second cells 120 through the plurality of first conductive members 20 , thereby reducing the voltage difference between the first cell assembly 11 and the second cell assembly 12 , The service life of the cell assembly 10 is improved.
  • the size of the circulating current is equal to the voltage difference/the sum of the two internal resistances, so even if the voltage difference is small, due to the small internal resistance of the cell, a large loop current can be formed instantaneously.
  • a conductive member 20 also has a current passing through, and the power consumption can be increased by setting the material and size of the first conductive member 20 , so as to balance and reduce the impact of instantaneous large current on the cell and the circuit board 30 .
  • the first positive and negative tabs and the second positive and negative tabs are directly welded, which can reduce heat generation and reduce structural components.
  • the first conductive member 20 is a copper bar.
  • the first conductive member 20 can also be a wire harness, or a copper foil provided on the circuit board 30, etc., which is not limited, and can realize the first cell
  • the conductive connection between 110 and the second cell 120 is sufficient.
  • the first cell assembly 11 includes N first cells 110
  • the second cell assembly 12 includes N second cells 120
  • the battery pack 100 includes N ⁇ 1 first conductive members 20 , where N is a natural integer.
  • the first welding portion 21 of the first conductive member 20 is connected to the first positive electrode tab 111 and the first negative electrode tab 112 in a stacked connection, and the second welding portion 22 of the first conductive member 20 is connected to each other.
  • the second positive electrode tab 121 and the second negative electrode tab 122 are stacked and connected.
  • the battery pack 100 further includes a spacer 60 disposed between the cell assembly 10 and the circuit board 30 .
  • the spacer 60 is provided with a plurality of spacers 61 , and each of the first conductive elements 20 is disposed between two adjacent spacers 61 to prevent adjacent A conductive member 20 is in contact with each other.
  • the second conductive member 40 includes a first connection portion 41 , a second connection portion 42 and a buffer portion 43 .
  • the buffer portion 43 is connected to the first connection portion 41 and the second connection portion 42
  • the first connection portion 41 is connected to the circuit board 30
  • the second connection portion 42 is connected to the first conductive member 20 .
  • the first connection portion 41 and the second connection portion 42 are connected to the circuit board 30 and the first conductive member 20 by welding.
  • the first connection portion 41 and The second connection portion 42 may be connected to the circuit board 30 and the first conductive member 20 by means of conductive adhesive bonding or the like, and the present application is not limited thereto.
  • the buffer portion 43 has elasticity, and its structure includes, but is not limited to, a "bow" shape or a wave shape.
  • the number of the second conductive members 40 is N ⁇ 1, which is the same as the number of the first conductive members 20 .
  • the N-1 second conductive members 40 are respectively disposed on opposite sides of the circuit board 30 and connected to the end of the first conductive member 20 not covered by the circuit board 30. Specifically, the second conductive members The member 40 is connected to the first welding portion 21 or the second welding portion 22 of the first conductive member 20 .
  • the first conductive member 20 is mainly used to balance the voltage between the parallel cells
  • the second conductive member 40 is mainly used to collect the information of the cells.
  • the second conductive member 40 is directly connected to the first conductive member 20, and can collect information of two adjacent cells at a time. Compared with the prior art that requires one collection member for one cell, the technical solution of the present application reduces the number of collection parts. quantity.
  • the first battery cell 110 and the second battery cell 120 are arranged in a one-to-one correspondence, wherein, The first negative tab 112 and the second positive tab 121 are provided between the first positive tab 111 and the second negative tab 122, or the first positive tab 111 and the second negative tab 122 is provided between the first negative electrode lug 112 and the second positive electrode lug 121, and the lengths of the plurality of first conductive members 20 connecting the first cell assembly 11 and the second cell assembly 12 are equal;
  • FIG. 10 in one of the embodiments of the present application, along the width direction of the first battery cell 110 , the first battery cell 110 and the second battery cell 120 are arranged in a one-to-one correspondence, wherein, The first negative tab 112 and the second positive tab 121 are provided between the first positive tab 111 and the second negative tab 122, or the first positive tab 111 and the second negative tab 122 is provided between the first negative electrode lug 112 and the second positive electrode lug 121, and the lengths of the plurality of first conductive members
  • the first positive tab 111 and the second positive tab 121 are arranged between the first negative tab 112 and the second negative tab 122, and are connected to the first electrical
  • the lengths of the plurality of first conductive members 20 of the core assembly 11 and the second cell assembly 12 are not equal.
  • the battery pack 100 further includes a mounting bracket 70 disposed on the top surface of the cell assembly 10 .
  • the mounting bracket 70 is provided with a plurality of openings 71 .
  • the first positive tabs 111 and the first negative tabs 112 of the plurality of first cells 110 pass through the openings 71 on the mounting bracket 70 and are connected to the first surface of the mounting bracket 70 facing away from the cell assembly 10 .
  • the second positive tabs 121 and the second negative tabs 122 of the plurality of second cells 120 pass through the openings 71 on the mounting bracket 70 and are connected to the first surface of the mounting bracket 70 facing away from the cell assembly 10 .
  • the mounting bracket 70 is a non-conductive member.
  • the first conductive member 20 can be fixed on the first surface of the mounting bracket 70 away from the cell assembly 10 by means of riveting, bonding or the like.
  • the first cell 110 and the second cell 120 are arranged in a one-to-one correspondence, wherein, The first negative electrode lug 112 and the second negative electrode lug 122 are provided between the first positive electrode lug 111 and the second positive electrode lug 121; or, the first positive electrode lug 111 and the second positive electrode lug The lugs 121 are arranged between the first negative electrode lugs 112 and the second negative electrode lugs 122 .
  • the lengths are not equal. Specifically, the length of the Nth first conductive member 20 is different from the length of the N+1th first conductive member 20, and the length of the Nth first conductive member 20 is different from that of the N+2th first conductive member 20. of the same length.
  • the structures of the cell assembly 10 and the casing 50 in the present application can be used in combination to form different embodiments, for example, the cell assembly in FIG. 11 is used in the battery pack in FIG.
  • the cell assembly can be combined with the first housing in FIG. 1 , and those skilled in the art can perform various combinations, which are not limited.
  • an embodiment of the present application further provides a battery pack 200 , including a casing 201 and the battery pack 100 in any of the foregoing embodiments or a combination of embodiments.
  • the battery pack 100 is accommodated in the casing 201 .
  • a connector 202 is further provided on the surface of the casing 201 , and the connector 202 is electrically connected to the battery pack 100 .
  • the present application also provides an electrical device (not shown), the electrical device includes a body and the battery pack 100 or battery pack 200 in the above-mentioned embodiment, and the battery pack 200 is provided in the body.
  • the electrical device may be an electric vehicle, an electric bus, an electric vehicle, an energy storage device, an electric bicycle, a flying device, etc.
  • the main body is a vehicle body structure, and the battery pack 200 is provided in the inside the vehicle body for power supply.
  • the electrical device may also be a hand-held electrical device, such as a vacuum cleaner, a lawn mower and other devices.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Battery Mounting, Suspending (AREA)
  • Connection Of Batteries Or Terminals (AREA)

Abstract

一种电池组，包括壳体、第一电芯组件、第二电芯组件和第一导电件。壳体包括第一壳体和安装支架。第一电芯组件和第二电芯组件设于第一壳体内，分别包括多个第一电芯和第二电芯，相邻第一电芯之间的第一正极耳和第一负极耳层叠连接，相邻第二电芯之间的第二正极耳和第二负极耳层叠连接。安装支架上设第一通孔和第二通孔，相邻第一电芯的第一正极耳和第一负极耳从第一通孔伸出并连接，相邻第二电芯的第二正极耳和第二负极耳从第二通孔伸出并连接。第一导电件连接第一电芯和第二电芯。上述电池组通过设置安装支架，使多个极耳、导电件之间的连接位置稳定。本申请还提供一种具有上述电池组的电池包和具有该电池包的用电装置。

Description

电池组、电池包和用电装置 技术领域
本申请涉及电池领域，尤其涉及一种电池组、具有该电池组的电池包和具有该电池包的用电装置。
背景技术
现有技术中，电池组中多个电芯的极耳之间往往直接连接，电池组中缺少对极耳及其连接件进行固定的结构，电路板也直接设置于电池组的一侧表面并与多个极耳连接。当电池组发生跌落或振动时，极耳、电路板等结构也会随之晃动，容易导致电池组内短路问题。
发明内容
鉴于上述状况，本申请提供一种电池组、具有该电池组的电池包和具有该电池包的用电装置，通过设置安装支架，电池组的多个极耳、导电件和电路板均设于安装支架，使得多个极耳、导电件和电路板之间的连接位置稳定，减少因振动导致的电池组内短路问题。
本申请的实施例提供一种电池组，包括壳体第一电芯组件和第二电芯组件。所述壳体包括第一壳体和安装支架，所述第一壳体设有收容空间。所述第一电芯组件和第二电芯组件设于所述收容空间。所述第一电芯组件包括多个堆叠设置的第一电芯，所述第一电芯包括第一正极耳和第一负极耳，相邻所述第一电芯之间，第一正极耳和第一负极耳层叠连接。所述第二电芯组件包括多个堆叠设置的第二电芯，所述第二电芯包括第二正极耳和第二负极耳，相邻所述第二电芯之间，第二正极耳和第二负极耳层叠连接。所述安装支架上 设有多个第一通孔和多个第二通孔，相邻所述第一电芯的第一正极耳和第一负极耳分别从相邻两个第一通孔伸出，并与所述安装支架的外表面连接，相邻所述第二电芯的第二正极耳和第二负极耳分别从相邻两个第二通孔伸出，并与所述安装支架的外表面连接。所述电池组还包括第一导电件，所述第一导电件包括第一焊接部和第二焊接部，所述第一焊接部连接于相互连接的第一正极耳和第一负极耳，所述第二焊接部连接于相互连接的第二正极耳和第二负极耳。
在一些实施例中，所述第一导电件包括连接所述第一焊接部和所述第二焊接部的第一连接部，所述第一焊接部和所述第二焊接部显露于所述安装支架外表面，所述第一焊接部焊接于相互连接的第一正极耳和第一负极耳中的至少一个，第二焊接部焊接于相互连接的第二正极耳和第二负极耳的至少一个。
在一些实施例中，所述安装支架由树脂材料制成，所述第一导电件与所述安装支架镶埋成型固定。
在一些实施例中，所述电池组件还包括电路板和多个第二导电件，所述电路板固定于所述安装支架，所述第二导电件一端与所述第一导电件连接，所述第二导电件的另一端与所述电路板连接。
在一些实施例中，所述第一导电件位于所述电路板与所述安装支架之间。
在一些实施例中，所述第二导电件包括第一连接部、缓冲部和第二连接部，所述缓冲部连接所述第一连接部和所述第二连接部，所述第一连接部焊接于所述电路板，所述第二连接部焊接于所述第一导电件。
在一些实施例中，所述安装支架的外表面还设有多个限位件，沿所述第一电芯的堆叠方向，所述第一导电件设置于相邻两个所述限位件之间。
在一些实施例中，所述安装支架的外表面还设有第一定位件， 所述第一导电件上设有第一定位孔，所述第一定位件设于所述第一定位孔。
在一些实施例中，沿所述第一电芯的堆叠方向，相邻所述第一通孔及相邻所述第二通孔之间还设有散热口。
在一些实施例中，所述安装支架上还设有第一支撑件和第二支撑件，所述第一支撑件用于支撑最外侧第一电芯的第一正极耳，所述第二支撑件用于支撑最外侧第二电芯的第二负极耳。
在一些实施例中，所述安装支架靠近所述电芯组件的内表面还有第一定位部和第二定位部，所述第一定位部设于相邻所述第一通孔之间，所述第二定位部设于相邻所述第二通孔之间。
在一些实施例中，所述第一壳体内设有若干第一收容腔和若干第二收容腔，每一所述第一收容腔内设有至少一个所述第一电芯，每一所述第二收容腔内设有至少一个所述第二电芯。
在一些实施例中，所述第一收容腔底部设有第一凹陷部，所述第二收容腔底部设有第二凹陷部，所述第一凹陷部和所述第二凹陷部用于收容树脂层，所述树脂层固定后将所述第一电芯和所述第二电芯粘接固定于所述第一壳体。
在一些实施例中，所述第一收容腔的侧壁设有第一仿形槽，所述第二收容腔的侧壁设有第二仿形槽，所述第一电芯的侧边收容于所述第一仿形槽，所述第二电芯的侧边收容于所述第二仿形槽。
本申请的实施例还提供一种电池包，包括外壳和上述任一项所述的电池组，所述电池组收容于所述外壳内。
本申请的实施例还提供一种用电装置，包括所述的电池包
上述电池组通过设置安装支架，电池组的多个极耳、导电件和电路板均设于安装支架，使得多个极耳、导电件和电路板之间的连接位置稳定，减少因振动导致的电池组内短路问题。
附图说明
图1为电池组在一实施例中的立体结构示意图。
图2为图1所示电池组的分解结构示意图。
图3为图1所示电池组中安装支架的立体结构示意图。
图4为图3所示安装支架在另一方向上的立体结构示意。
图5为图1所示电池组中第一壳体的立体结构示意图。
图6为图5所示第一壳体剪切部分结构后的结构示意图。
图7为电池组在一实施例中的分解结构示意图。
图8为图7所示电池组中电芯组件的立体结构示意图。
图9为图8所示电芯组件的分解结构示意图。
图10为图7所示电池组中电芯组件的俯视图。
图11为电芯组件在一实施例中的立体结构示意图。
图12为图11所示电芯组件的分解结构示意图。
图13为电芯组件在一实施例中的立体结构示意图。
图14为图13所示电芯组件的分解结构示意图。
图15为电池包在一实施例中的结构示意图。
主要元件符号说明：
电池组                   100
电芯组件                 10
第一电芯组件             11
第一电芯                 110
第一正极耳               111
第一负极耳               112
第一本体部               113
第二电芯组件             12
第二电芯                 120
第二正极耳              121
第二负极耳              122
第二本体部              123
第一导电件              20
第一焊接部              21
第二焊接部              22
连接部                  23
第一定位孔              24
电路板                  30
第二导电件              40
第一连接部              41
第二连接部              42
缓冲部                  43
壳体                    50
第一壳体                51
第一收容腔              511
第一凹陷部              5111
第一仿形槽              5112
第二收容腔              512
第二凹陷部              5121
第二仿形槽              5122
第二壳体                52
固定支架                53
第一定位槽              531
第二定位槽              532
安装支架                54
第一通孔                541
第二通孔                 542
限位件                   543
第一定位件               544
散热口                   545
第一支撑件               546
第二支撑件               547
第一定位部               548
第二定位部               549
隔离件                   60
隔离部                   61
安装支架                 70
开口                     71
电池包                   200
外壳                     201
连接器                   202
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。
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。
本申请实施例提供了一种电池组，包括壳体第一电芯组件和第二电芯组件。所述壳体包括第一壳体和安装支架，所述第一壳体设有收容空间。所述第一电芯组件和第二电芯组件设于所述收容空间。所述第一电芯组件包括多个堆叠设置的第一电芯，所述第一电芯包括第一正极耳和第一负极耳，相邻所述第一电芯之间，第一正极耳和第一负极耳层叠连接。所述第二电芯组件包括多个堆叠设置的第二电芯，所述第二电芯包括第二正极耳和第二负极耳，相邻所述第二电芯之间，第二正极耳和第二负极耳层叠连接。所述安装支架上设有多个第一通孔和多个第二通孔，相邻所述第一电芯的第一正极耳和第一负极耳分别从相邻两个第一通孔伸出，并与所述安装支架的外表面连接，相邻所述第二电芯的第二正极耳和第二负极耳分别从相邻两个第二通孔伸出，并与所述安装支架的外表面连接。所述电池组还包括第一导电件，所述第一导电件包括第一焊接部和第二焊接部，所述第一焊接部连接于相互连接的第一正极耳和第一负极耳，所述第二焊接部连接于相互连接的第二正极耳和第二负极耳。
上述电池组通过设置安装支架，电池组的多个极耳、导电件均设于安装支架，使得多个极耳、导电件之间的连接位置稳定，减少因振动导致的电池组内短路问题。
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，电池组100包括电芯组件10、第一导电件20、电路板30、第二导电件40和壳体50。所述电芯组件10包括并 联连接的第一电芯组件11和第二电芯组件12，所述第一电芯组件包括多个堆叠设置的第一电芯110，所述第二电芯组件包括多个堆叠设置的第二电芯120，第一电芯组件11和第二电芯组件12将会在其他图中进行具体说明。所述第一导电件20电连接于所述第一电芯组件11和所述第二电芯组件12。所述第二导电件40一端与第一导电件20电性连接，所述第二导电件40的另一端与电路板30电性连接。所述电芯组件10的第一电芯组件11和第二电芯组件12收容于所述壳体50内。所述壳体50包括第一壳体51和安装支架54，所述电芯组件10收容于所述第一壳体51，所述安装支架54设置于所述第一壳体51的开口端。所述安装支架54由树脂材料制成，所述第一导电件20与所述安装支架54镶埋成型固定，或所述第一导电件20以可拆卸方式固定于所述安装支架54，其他实施例中，所述安装支架54也可以由其他不导电材料制成，所述第一导电件20可以固定于所述安装支架54的外表面。所述第一导电件20包括第一焊接部21和第二焊接部22，所述第一焊接部21和所述第二焊接部22显露于所述安装支架54的外表面，所述第一焊接部21焊接于相互连接的第一正极耳111和第一负极耳112中的至少一个，第二焊接部22焊接于相互连接的第二正极耳121和第二负极耳122中的至少一个。
在一些实施例中，所述第一导电件20和所述电路板30均设置于所述安装支架54的外表面，所述第一导电件20位于所述电路板30与所述安装支架54之间。所述电路板30固定于所述安装支架54上。所述壳体50还可以包括一盖板(图未示)，设置于所述安装支架54的外表面，所述电路板30收容于所述盖板内。
本实例中，电路板30为设有电池管理系统的电路板，在其他实施例中，第一导电件20可以直接焊接在电路板30上，电路板30上设置和第一导电件20连接的线路以实现对电芯组件10的采集和 控制，也可以在电路板30上开孔，方便极耳从开孔穿过，并与电路板30的外表面实施正负极耳的连接，以串联相邻电芯。
请继续参阅图3，所述安装支架54上设有多个第一通孔541和多个第二通孔542，相邻所述第一电芯的第一正极耳111和第一负极耳112分别从相邻两个第一通孔541伸出，并与所述安装支架54远离第一电芯组件的外表面连接，相邻所述第二电芯的第二正极耳121和第二负极耳122分别从相邻两个第二通孔542伸出，并与所述安装支架54远离第一电芯组件的外表面连接。沿第一电芯的堆叠方向，相邻所述第一通孔541及相邻所述第二通孔542之间还设有散热口545，用于排出电芯组件10在充放电过程中产生的热量。
所述安装支架54用于固定和支撑电芯组件10的极耳、第一导电件20和电路板30。第一导电件20可与安装支架54热熔固定或镶嵌成型固定，有利于自动化生产，或所述第一导电件20以可拆卸方式固定于所述安装支架54。第一电芯和第二电芯的极耳分别穿过第一通孔541和第二通孔542，安装支架54的外表面有利于对极耳的安装固定提供支撑，方便对极耳进行焊接操作。电路板30固定设置于安装支架54，方便第二导电件40与电路板30的焊接固定。
所述安装支架54的外表面还设有多个限位件543和第一定位件544，用于固定所述第一导电件20的安装位置，防止相邻第一导电件20相互接触而发生短路问题。沿所述第一电芯的堆叠方向，每一所述第一导电件20设置于相邻两个所述限位件543之间。所述第一导电件20上设有第一定位孔24，所述第一定位件544设于所述第一定位孔24。本实施例中，所述第一定位件544设于相邻所述限位件543之间，其他实施例中，所述第一定位件544设于所述安装支架54的其他部分，另外，也可通过对所述第一定位件544进行热融处理，将第一导电件20固定于所述安装支架54。
请再次参阅图2和图3，在一些实施例中，所述安装支架54上 还设有第一支撑件546和第二支撑件547。所述第一支撑件546用于支撑电芯组件10中最外侧第一电芯的第一正极耳111，所述第二支撑件547用于支撑电芯组件10中最外侧第二电芯的第二负极耳122，以便连接电池组100的总正输出端子和总负输出端子。具体的，所述第一支撑件546和第二支撑件547突出于所述安装支架54的外表面，所述电芯组件10中最外侧第一电芯的第一正极耳111朝向所述第一支撑件546折弯，所述第一支撑件546的端部支撑所述第一正极耳111的折弯部分，所述电芯组件10中最外侧第二电芯的第二负极耳122朝向所述第二支撑件547折弯，所述第二支撑件547的端部支撑所述第二负极耳122的折弯部分。
请参阅图4，在一些实施例中，所述安装支架54朝向电芯组件10的内表面还有第一定位部548和第二定位部549所述第一定位部548设于相邻所述第一通孔541之间，所述第二定位部549设于相邻所述第二通孔542之间。所述第一定位部548设于相邻第一电芯的极耳之间，所述第二定位部549设于相邻第二电芯的极耳之间，以减少电芯组件10的内短路问题。
请参阅图5，在一些实施例中，所述第一壳体51内设有若干第一收容腔511和若干第二收容腔512。每一所述第一收容腔511内设有至少一个所述第一电芯，每一所述第二收容腔512内设有至少一个所述第二电芯。所述第一收容腔511的侧壁设有第一仿形槽5112，所述第二收容腔512的侧壁设有第二仿形槽5122。所述第一电芯的侧边收容于所述第一仿形槽5112，所述第二电芯的侧边收容于所述第二仿形槽5122。
请参阅图6，在一些实施例中，所述第一收容腔511底部设有第一凹陷部5111，所述第二收容腔512底部设有第二凹陷部5121。所述第一凹陷部5111和所述第二凹陷部5121用于收容树脂层，所述树脂层固定后将所述第一电芯和所述第二电芯粘接固定于所述第 一壳体。所述树脂层包括但不限于结构胶、灌封胶等，也可以由塑胶颗粒融化后灌注、填充到凹陷部，以形成树脂层。
请参阅图7至图10描述的另外一个电池组的结构，所述壳体50包括第一壳体51、第二壳体52和固定支架53，所述电芯组件10收容于所述第一壳体51和所述第二壳体52内。具体地，所述第一电芯组件11收容于所述第一壳体51，所述第二电芯组件12收容于所述第二壳体52。所述固定支架53用于固定所述第一电芯组件11和所述第二电芯组件12。沿所述第一电芯组件11的宽度方向，即图7中箭头A指示方向，所述第一电芯组件11和所述第二电芯组件12设置于所述固定支架53相对的两侧。所述固定支架53的相对两侧分别设有第一定位槽531和第二定位槽532，沿所述电芯组件10的宽度方向，所述第一电芯110的一侧收容于所述第一定位槽531，所述第二电芯120的一侧收容于所述第二定位槽532。
请再次参阅图7和图8，所述第一电芯组件11和所述第二电芯组件12沿所述第一电芯组件11的宽度方向设置。所述第一电芯组件11的宽度方向为图7中箭头A指示方向，所述第一导电件20电连接于所述第一电芯组件11和所述第二电芯组件12。所述第二导电件40一端与第一导电件20电性连接，所述第二导电件40的另一端与电路板30电性连接。
所述第一电芯组件11包括多个第一电芯110，沿第一电芯110的厚度方向，多个所述第一电芯110层叠设置。所述每个第一电芯110包括第一正极耳111、第一负极耳112和第一本体部113。所述第一正极耳111和第一负极耳112设于所述第一本体部113的同一侧，且所述第一正极耳111和第一负极耳112沿第一本体部113的长度方向延伸出第一本体部113。相邻所述第一电芯110之间，一第一电芯110的第一正极耳111和另一第一电芯110的第一负极耳112连接。所述第二电芯组件12包括多个第二电芯120，沿第二电 芯120的厚度方向，多个所述第二电芯120层叠设置，本实施里中，第一电芯110的层叠方向和第二电芯120的层叠方向相同。所述第二电芯包括第二正极耳121、第二负极耳122和第二本体部123。所述第二正极耳121和第二负极耳122设于所述第二本体部123的同一侧，且所述第二正极耳121和第二负极耳122沿第二本体部123的长度方向延伸出第二本体部123。相邻所述第二电芯120之间，一第二电芯120第二正极耳121和另一第二电芯120第二负极耳122连接。
本申请中的一些实施中，第一电芯组件11的宽度方向、第二电芯组件12的宽度方向、第一电芯110的宽度方向相同，具体的，第一电芯组件11的宽度方向同时垂直第一电芯110的长度方向和厚度方向，第二电芯组件12的宽度方向同时垂直第一电芯110的长度方向和厚度方向。图1中，箭头B指示的方向为第一电芯110的长度方向，箭头C指示的方向为第一电芯110的厚度方向。
请继续参阅图9，所述第一导电件20包括第一焊接部21、第二焊接部22和连接第一焊接部21和第二焊接部22的连接部23。所述第一焊接部21焊接于相互连接的第一正极耳111和第一负极耳112，所述第二焊接部22焊接于相互连接的第二正极耳121和第二负极耳122。具体的，所述第一焊接部21设于第一正极耳111和第一负极耳112之间，所述第一焊接部21与第一正极耳111和第一负极耳112焊接，或第一正极耳111设于所述第一焊接部21和第一负极耳112之间，所述第一焊接部21与第一正极耳111焊接，或第一负极耳112设于所述第一焊接部21和第一正极耳111之间，所述第一焊接部21与第一负极耳112焊接。本实施例中，第一负极耳112设于所述第一焊接部21和第一正极耳111之间，所述第一焊接部21与第一负极耳112焊接。所述第二焊接部22设于第二正极耳121和第二负极耳122之间，所述第二焊接部22与第二正极耳121和第 二负极耳122焊接，或第二正极耳121设于所述第二焊接部22和第二负极耳122之间，所述第二焊接部22与第二正极耳121焊接，或所述第二负极耳122设于所述第二焊接部22和第二正极耳121之间，所述第二焊接部22与第二负极耳122焊接。本实施例中，所述第二负极耳122设于所述第二焊接部22和第二正极耳121之间，所述第二焊接部22与第二负极耳122焊接。
在本申请的实施例中，所述第一电芯110和所述第二电芯120为软包电芯。相邻所述第一电芯110之间，一第一电芯110的第一正极耳111和另一第一电芯110的第一负极耳112层叠焊接，相邻所述第二电芯120之间，一第二电芯120的第二正极耳121和另一第二电芯120第二负极耳122层叠焊接。在本申请的另一实施例中，所述第一电芯组件11和所述第二电芯组件12也可以沿所述第一电芯110的堆叠方向设置。
第一电芯110和第二电芯120通过第一导电件20之间并联形成电路单元，并联后再和相邻的一组电路单元串联。单个电路单元中，当并联的第一电芯110和第二电芯120电压不一致时，第一电芯110和第二电芯120电压会出现环流，环流的方向是从较高电压的电芯出来(放电的方向)，倒灌进入较低电压的电芯(充电的方向)，从而将第一电芯110和第二电芯120的电压均衡，缩小第一电芯110和第二电芯120的压差，保证第一电芯110和第二电芯120在使用过程中能够等量充电和放电，减少单个电芯因电压不均衡而无法完全充电或剩余电量无法使用的问题，改善电芯的循环性能，提升电芯的使用寿命。电池组100通过多个第一导电件20，将多个第一电芯110和第二电芯120进行电压均衡，降低第一电芯组件11和第二电芯组件12之间的压差，提高电芯组件10的使用寿命。另外，根据电路学欧姆定律，环流的大小等于电压差/两内阻的和，所以即使压差很小，由于电芯内阻很小，能够瞬间形成较大的环路电流，出 现环流时第一导电件20也会有电流通过，可以通过设置第一导电件20的材料和尺寸增加功耗，从而进行均衡，减少瞬间大电流对电芯和电路板30的冲击。另外，相比于连接铜排与多个极耳焊接的方式，第一正负极耳、第二正负极耳直接焊接，可以降低发热，减少结构件。
本实施中，第一导电件20为铜排，其他实施例中，第一导电件20也可为线束，或设于电路板30上的铜箔等，不以为限，能实现第一电芯110和第二电芯120的导电连接即可。
请再次参阅图9，在一些实施例中，所述第一电芯组件11包括N个所述第一电芯110，所述第二电芯组件12包括N个所述第二电芯120，所述电池组100包括N-1个所述第一导电件20，N为自然整数。所述第一导电件20的第一焊接部21与相互连接所述第一正极耳111和所述第一负极耳112层叠连接，所述第一导电件20的第二焊接部22与相互连接所述第二正极耳121和所述第二负极耳122层叠连接。在一些实施例中，所述电池组100还包括设置于所述电芯组件10和电路板30之间的隔离件60。沿第一电芯110的厚度方向，所述隔离件60上设有多个隔离部61，每一所述第一导电件20设置于相邻两个隔离部61之间，以防止相邻第一导电件20相互接触。
所述第二导电件40包括第一连接部41、第二连接部42和缓冲部43。缓冲部43连接所述第一连接部41和所述第二连接部42，所述第一连接部41连接所述电路板30，所述第二连接部42连接所述第一导电件20。在本实施例中，所述第一连接部41和所述第二连接部42与电路板30和第一导电件20之间焊接连接，在其他实施例中，所述第一连接部41和所述第二连接部42与电路板30和第一导电件20之间可以通过导电胶粘接等方式进行连接，本申请不限定于此。所述缓冲部43具有弹性，其结构包括但不限于“弓”字形或波 浪形。电池组100中，所述第二导电件40的数量为N-1，与所述第一导电件20的数量相同。N-1个所述第二导电件40分别设置于所述电路板30的相对两侧，连接于所述第一导电件20未被电路板30覆盖的一端，具体地，所述第二导电件40连接于所述第一导电件20的第一焊接部21或第二焊接部22。
第一导电件20主要用于平衡并联电芯之间的电压，第二导电件40主要用于采集电芯的信息。第二导电件40直接和第一导电件20连接，能够一次采集两个相邻电芯的信息，相对于现有技术的一个电芯需要一个采集件，本申请的技术方案减少了采集件的数量。
请参阅图10，在本申请的其中一个实施例中，沿所述第一电芯110的宽度方向，所述第一电芯110和所述第二电芯120一一对应排列设置，其中，所述第一负极耳112和所述第二正极耳121设于所述第一正极耳111和所述第二负极耳122之间，或所述第一正极耳111和所述第二负极耳122设于所述第一负极耳112和所述第二正极耳121之间，连接第一电芯组件11和第二电芯组件12的多个第一导电件20的长度相等；或者，在另一实施例中，请参阅图13，所述第一正极耳111和所述第二正极耳121设于所述第一负极耳112和所述第二负极耳122之间，连接第一电芯组件11和第二电芯组件12的多个第一导电件20的长度不相等。
请参阅图11和图12，在一些实施例中，所述电池组100还包括安装支架70，设置于所述电芯组件10的顶面。所述安装支架70上设有多个开口71。多个第一电芯110的第一正极耳111和第一负极耳112穿过所述安装支架70上的开口71，并连接于安装支架70背离所述电芯组件10的第一表面。多个第二电芯120的第二正极耳121和第二负极耳122穿过所述安装支架70上的开口71，并连接于安装支架70背离所述电芯组件10的第一表面。所述安装支架70为不导电件。所述第一导电件20可通过铆接、粘接等方式固定设于 所述安装支架70背离所述电芯组件10的第一表面。
请参阅图13和图14，在另一实施例中，沿所述第一电芯110的宽度方向，所述第一电芯110和所述第二电芯120一一对应排列设置，其中，所述第一负极耳112和所述第二负极耳122设于所述第一正极耳111和所述第二正极耳121之间；或者，所述第一正极耳111和所述第二正极耳121设于所述第一负极耳112和所述第二负极耳122之间，为了配合第一电芯110和第二电芯120的排布位置，相邻两个第一导电件20的长度不相等。具体地,第N个第一导电件20的长度与第N+1个第一导电件20的长度不相同，第N个第一导电件20的长度与第N+2个第一导电件20的长度相同。
本申请中电芯组件10和壳体50的结构可以组合使用，形成不同的实施例，比如，图11中电芯组件用于图1的电池组中，或图11中电池组的实施例的电芯组件可组合图1中的第一壳体，本领域人员可以进行多种组合，不以为限。
请参阅图15，本申请的实施例还提供一种电池包200，包括外壳201和上述任意实施例或实施例组合中的电池组100。所述电池组100收容于所述外壳201内。所述外壳201表面还设有连接器202，所述连接器202电连接所述电池组100。
本申请还提供一种用电装置(图未示)，所述用电装置包括本体和上述实施例中的电池组100或电池包200，所述电池包200设于所述本体中。进一步的，所述用电装置可为电动车、电动公交车、电动汽车汽车、储能设备、电动自行车、飞行设备等，相应的，所述本体为车体结构，所述电池包200设于所述车体内，以进行供电。
可以理解的是，在其他实施例中，所述用电装置还可是手持电动装置，如吸尘器、除草机等其他装置。
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 (16)

  1. 一种电池组，包括：
    壳体，包括第一壳体和安装支架，所述第一壳体设有收容空间；
    第一电芯组件，设于所述收容空间，所述第一电芯组件包括多个堆叠设置的第一电芯，所述第一电芯包括第一正极耳和第一负极耳，相邻所述第一电芯之间，第一正极耳和第一负极耳层叠连接；
    第二电芯组件，设于所述收容空间，所述第二电芯组件包括多个堆叠设置的第二电芯，所述第二电芯包括第二正极耳和第二负极耳，相邻所述第二电芯之间，第二正极耳和第二负极耳层叠连接；
    其特征在于：所述安装支架上设有多个第一通孔和多个第二通孔，相邻所述第一电芯的第一正极耳和第一负极耳分别从相邻两个第一通孔伸出，并与所述安装支架的远离第一电芯组件的外表面连接，相邻所述第二电芯的第二正极耳和第二负极耳分别从相邻两个第二通孔伸出，并与所述安装支架的远离第一电芯组件的外表面连接；
    所述电池组还包括第一导电件，所述第一导电件包括第一焊接部和第二焊接部，所述第一焊接部连接于相互连接的第一正极耳和第一负极耳，所述第二焊接部连接于相互连接的第二正极耳和第二负极耳。
  2. 如权利要求1所述的电池组，其特征在于，所述第一导电件包括连接所述第一焊接部和所述第二焊接部的第一连接部，所述第一焊接部和所述第二焊接部显露于所述安装支架外表面，所述第一焊接部焊接于相互连接的第一正极耳和第一负极耳中的至少一个，第二焊接部焊接于相互连接的第二正极耳和第二负极耳的至少一个。
  3. 如权利要求2所述的电池组，其特征在于，所述安装支架由树脂材料制成，所述第一导电件与所述安装支架镶埋成型固定。
  4. 如权利要求1-3任一所述的电池组，其特征在于，
    所述电池组件还包括电路板和多个第二导电件，所述电路板固定于所述安装支架，所述第二导电件一端与所述第一导电件连接，所述第二导电件的另一端与所述电路板连接。
  5. 如权利要求4所述的电池组，其特征在于，所述第一导电件位于所述电路板与所述安装支架之间。
  6. 如权利要求5所述的电池组，其特征在于，所述第二导电件包括第一连接部、缓冲部和第二连接部，所述缓冲部连接所述第一连接部和所述第二连接部，所述第一连接部焊接于所述电路板，所述第二连接部焊接于所述第一导电件。
  7. 如权利要求5所述的电池组，其特征在于，所述安装支架的外表面还设有多个限位件，沿所述第一电芯的堆叠方向，所述第一导电件设置于相邻两个所述限位件之间。
  8. 如权利要求5所述的电池组，其特征在于，所述安装支架的外表面还设有第一定位件，所述第一导电件上设有第一定位孔，所述第一定位件设于所述第一定位孔。
  9. 如权利要求5所述的电池组，其特征在于，沿所述第一电芯的堆叠方向，相邻所述第一通孔及相邻所述第二通孔之间还设有散热口。
  10. 如权利要求5所述的电池组，其特征在于，所述安装支架上还设有第一支撑件和第二支撑件，所述第一支撑件用于支撑最外侧第一电芯的第一正极耳，所述第二支撑件用于支撑最外侧第二电芯的第二负极耳。
  11. 如权利要求5所述的电池组，其特征在于，所述安装支架靠近所述电芯组件的内表面还有第一定位部和第二定位部，所述第一定位部设于相邻所述第一通孔之间，所述第二定位部设于相邻所述第二通孔之间。
  12. 如权利要求5所述的电池组，其特征在于，所述第一壳体 内设有若干第一收容腔和若干第二收容腔，每一所述第一收容腔内设有至少一个所述第一电芯，每一所述第二收容腔内设有至少一个所述第二电芯。
  13. 如权利要求12所述的电池组，其特征在于，所述第一收容腔底部设有第一凹陷部，所述第二收容腔底部设有第二凹陷部，所述第一凹陷部和所述第二凹陷部用于收容树脂层，所述树脂层固定后将所述第一电芯和所述第二电芯粘接固定于所述第一壳体。
  14. 如权利要求12所述的电池组，其特征在于，所述第一收容腔的侧壁设有第一仿形槽，所述第二收容腔的侧壁设有第二仿形槽，所述第一电芯的侧边收容于所述第一仿形槽，所述第二电芯的侧边收容于所述第二仿形槽。
  15. 一种电池包，其特征在于，包括外壳和权利要求1-14任一项所述的电池组，所述电池组收容于所述外壳内。
  16. 一种用电装置，其特征在于，包括如权利要求15所述的电池包。
PCT/CN2020/132889 2020-11-30 2020-11-30 电池组、电池包和用电装置 WO2022110189A1 (zh)

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Citations (4)

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Publication number Priority date Publication date Assignee Title
CN203367396U (zh) * 2013-08-09 2013-12-25 四川长虹电源有限责任公司 一种由单体电芯组合成的蓄电池
CN103647117A (zh) * 2013-11-04 2014-03-19 河南福森新能源科技有限公司 一种软包锂离子电池内部结构及组装方法
CN108258168A (zh) * 2018-03-21 2018-07-06 湖南金杯新能源发展有限公司 方形电芯模组
WO2020110976A1 (ja) * 2018-11-28 2020-06-04 三洋電機株式会社 電池及びその製造方法

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN203367396U (zh) * 2013-08-09 2013-12-25 四川长虹电源有限责任公司 一种由单体电芯组合成的蓄电池
CN103647117A (zh) * 2013-11-04 2014-03-19 河南福森新能源科技有限公司 一种软包锂离子电池内部结构及组装方法
CN108258168A (zh) * 2018-03-21 2018-07-06 湖南金杯新能源发展有限公司 方形电芯模组
WO2020110976A1 (ja) * 2018-11-28 2020-06-04 三洋電機株式会社 電池及びその製造方法

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