WO2022110192A1 - Battery pack and electric device - Google Patents

Battery pack and electric device Download PDF

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Publication number
WO2022110192A1
WO2022110192A1 PCT/CN2020/132893 CN2020132893W WO2022110192A1 WO 2022110192 A1 WO2022110192 A1 WO 2022110192A1 CN 2020132893 W CN2020132893 W CN 2020132893W WO 2022110192 A1 WO2022110192 A1 WO 2022110192A1
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WO
WIPO (PCT)
Prior art keywords
battery pack
cells
cell
cell assembly
tab
Prior art date
Application number
PCT/CN2020/132893
Other languages
French (fr)
Chinese (zh)
Inventor
周权
吴明杰
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 PCT/CN2020/132893 priority Critical patent/WO2022110192A1/en
Priority to CN202080107415.2A priority patent/CN116569405A/en
Publication of WO2022110192A1 publication Critical patent/WO2022110192A1/en

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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50Current conducting connections for cells or batteries
    • H01M50/528Fixed electrical connections, i.e. not intended for disconnection
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage using batteries

Definitions

  • the present application relates to the field of batteries, and in particular, to a battery pack and an electrical device having the battery assembly.
  • a conductive copper bar is usually used to connect a plurality of single cells to realize series-parallel connection of cells.
  • the conductive copper bars have disadvantages such as complex structure, high manufacturing cost, and large space occupation, which are not conducive to the miniaturization development of battery packs.
  • the present application provides a battery pack and an electrical device having the battery pack, which are electrically connected between the first cell and the second cell in the cell assembly through a plurality of first conductive members, thereby simplifying the electrical
  • the connection structure between the cores achieves the purpose of reducing the cost and reducing the space occupied by the connection structure.
  • Embodiments of the present application provide a battery pack including a cell assembly and a plurality of first conductive members.
  • the cell assembly includes a first cell assembly and a second cell assembly connected in parallel.
  • the first cell assembly includes a plurality of first cells, the plurality of first cells are stacked along the thickness direction of the first cells, the first cells include a first body portion, a first positive electrode ear and the first negative lug, the first positive lug and the first negative lug extend out of the first body part along the length direction of the first body part;
  • a positive tab is connected to the first negative tab of the other first battery cell.
  • the second cell assembly includes a plurality of second cells, the plurality of second cells are stacked along the thickness direction of the second cells, and the second cells include a second body portion, a second positive electrode lug and a second negative electrode tab, the second positive electrode tab and the second negative electrode tab extend out of the second body portion along the length direction of the second body portion, and between the adjacent second battery cells, the first The two positive tabs are connected to the second negative tab of the other second battery cell.
  • the first cell assembly and the second cell assembly are arranged along the width direction of the first cell assembly, and the width direction of the first cell assembly is perpendicular to the thickness direction and the thickness direction of the first cell at the same time. Longitudinal direction.
  • the first conductive member includes a first welding part and a second welding part, the first welding part is welded to the first positive electrode lug and the first negative electrode lug which are connected to each other, and the second welding part is welded to the second welding part that is connected to each other. Positive tab and second negative tab.
  • the first positive tab of the first cell is welded to the first negative tab of another first cell, and the second positive tab of the second cell is connected to the second negative tab of the other second cell. Solder connection.
  • the battery pack further includes a circuit board and a second conductive member, one end of the second conductive member is electrically connected to the first conductive member, and the other end of the second conductive member is electrically connected to the circuit board connect.
  • the first cell assembly includes N first cells
  • the second cell assembly includes N second cells
  • the battery pack includes N ⁇ 1 all In the first conductive member, N is a natural integer.
  • the battery pack includes N-1 of the second conductive members.
  • the first welding part of the first conductive member is stacked and connected to the first positive electrode tab and the first negative electrode tab, and the second welding part of the first conductive member is connected to each other.
  • the second positive tab and the second negative tab are stacked and connected.
  • the second conductive member is soldered to the circuit board.
  • 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, and the first connection part connects In the circuit board, the second connection portion is connected to the first conductive member.
  • the first cells and the second cells are arranged in a one-to-one correspondence, wherein the first negative tab and the second The negative pole is arranged between the first positive pole and the second positive pole, or, the first positive pole and the second positive pole are arranged between the first negative pole and the second negative pole between.
  • the first cells and the second cells are arranged in a one-to-one correspondence, wherein the first negative tab and the second The positive tab is arranged between the first positive tab and the second negative tab, or the first positive tab and the second negative tab are arranged between the first negative tab and the second positive tab between.
  • the battery pack further includes a case, the case includes a first case and a second case, and a fixing bracket disposed between the first case and the second case, the The first battery core assembly is accommodated in the first casing, the second battery core assembly is accommodated in the second casing, and opposite sides of the fixing bracket are respectively provided with a first positioning groove and a second positioning groove, along the In the width direction of the first cell assembly, one side of the first cell is fixed to the first positioning groove, and one side of the second cell is fixed to the second positioning groove.
  • the battery pack further includes a separator, a plurality of separators are provided on the separator, and the first conductive member is disposed between adjacent separators.
  • the battery pack further includes a mounting plate, the mounting plate is provided with an opening, the first positive tab and the first negative tab pass through the opening and are disposed on the mounting plate away from the The first surface of the cell assembly, the second positive tab and the second negative tab pass through the opening and are disposed on the first surface of the mounting plate, and the first conductive member is fixed on the first surface of the mounting plate surface.
  • the battery pack includes a first housing and a mounting bracket, the cell assembly is accommodated in the first housing, and a surface of the mounting bracket close to the cell assembly is provided with a plurality of first A positioning portion and a plurality of second positioning portions, the first positioning portions are arranged between the tabs of the adjacent first cells, and the second positioning portions are arranged between the tabs of the adjacent second cells .
  • the first cell and the second cell are soft-wrapped cells.
  • the battery pack further includes a circuit board, and the first conductive member is soldered to the circuit board.
  • Embodiments of the present application also provide an electrical device, including the battery pack described in any one of the above.
  • the above-mentioned battery pack is electrically connected between the first cell and the second cell in the cell assembly through a plurality of first conductive members, which replaces the traditional conductive copper bar, simplifies the connection structure between the cells, and reduces costs. , the purpose of reducing the space occupied by the connection structure.
  • FIG. 1 is a schematic diagram of an exploded structure of a battery pack in an embodiment.
  • FIG. 2 is a schematic three-dimensional structural diagram of a cell assembly in the battery pack shown in FIG. 1 .
  • FIG. 3 is a schematic diagram of an exploded structure of the cell assembly shown in FIG. 2 .
  • FIG. 4 is a top view of the cell assembly in the battery pack shown in FIG. 1 .
  • FIG. 5 is a schematic three-dimensional structure diagram of a cell assembly in an embodiment.
  • FIG. 6 is a schematic diagram of an exploded structure of the cell assembly shown in FIG. 5 .
  • FIG. 7 is a schematic three-dimensional structural diagram of a cell assembly in an embodiment.
  • FIG. 8 is a schematic diagram of an exploded structure of the cell assembly shown in FIG. 7 .
  • FIG. 9 is a schematic three-dimensional structure diagram of a battery pack in an embodiment.
  • FIG. 10 is a schematic diagram of an exploded structure of the battery pack shown in FIG. 9 .
  • FIG. 11 is a schematic three-dimensional structural diagram of the mounting bracket in the battery pack shown in FIG. 9 .
  • FIG. 12 is a schematic three-dimensional structure diagram of the mounting bracket shown in FIG. 11 in another direction.
  • FIG. 13 is a schematic three-dimensional structural diagram of the first casing in the battery pack shown in FIG. 9 .
  • FIG. 14 is a schematic view of the structure of the first casing shown in FIG. 13 after cutting the structure.
  • 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 cell assembly and a plurality of first conductive members.
  • the cell assembly includes a first cell assembly and a second cell assembly connected in parallel.
  • the first cell assembly includes a plurality of first cells, the plurality of first cells are stacked along the thickness direction of the first cells, the first cells include a first body portion, a first positive electrode ear and the first negative lug, the first positive lug and the first negative lug extend out of the first body part along the length direction of the first body part;
  • a positive tab is connected to the first negative tab of the other first battery cell.
  • the second cell assembly includes a plurality of second cells, the plurality of second cells are stacked along the thickness direction of the second cells, and the second cells include a second body portion, a second positive electrode lug and a second negative electrode tab, the second positive electrode tab and the second negative electrode tab extend out of the second body portion along the length direction of the second body portion, and between the adjacent second battery cells, the first The two positive tabs are connected to the second negative tab of the other second battery cell.
  • the first cell assembly and the second cell assembly are arranged along the width direction of the first cell assembly, and the width direction of the first cell assembly is perpendicular to the thickness direction and the thickness direction of the first cell at the same time. Longitudinal direction.
  • One end of the first conductive member is welded to the mutually connected first positive electrode tab and the first negative electrode tab, and the other end of the first conductive member is welded to the mutually connected second positive electrode tab and the second negative electrode tab.
  • the above-mentioned battery pack is electrically connected between the first cell and the second cell in the cell assembly through a plurality of first conductive members, which replaces the traditional conductive copper bar, simplifies the connection structure between the cells, and reduces costs. , the purpose of reducing the space occupied by the connection structure.
  • 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 11 and the second cell assembly 12 are along the first cell assembly 11 .
  • the width direction of the first cell assembly 11 is the direction indicated by arrow A in FIG. 1 .
  • 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 , and the other end of the second conductive member 40 is electrically connected to the circuit board 30 .
  • the cell assembly 10 is accommodated in the casing 50 .
  • 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 connected to each other, and the second welding portion 22 is welded to the mutually connected second positive electrode tab 121 and the second negative electrode tab 122 .
  • 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 cells 110 and the second cells 120 are arranged in a one-to-one correspondence along the width direction of the first cells 110 , 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 arranged 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; or, please Referring to FIG.
  • the first positive electrode tab 111 and the second positive electrode tab 121 are arranged between the first negative electrode tab 112 and the second negative electrode tab 122 to connect the first battery cell assembly 11 and the second battery pack
  • the lengths of the plurality of first conductive members 20 of the core assembly 12 are not equal.
  • the battery pack 100 further includes a mounting plate 70 disposed on the top surface of the cell assembly 10 .
  • the mounting plate 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 plate 70 and are connected to the first surface of the mounting plate 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 plate 70 and are connected to the first surface of the mounting plate 70 facing away from the cell assembly 10 .
  • the mounting plate 70 is a non-conductive member.
  • the first conductive member 20 can be fixed on the first surface of the mounting plate 70 away from the cell assembly 10 by means of riveting, bonding, or the like.
  • the first cells 110 and the second cells 120 are arranged in a one-to-one correspondence along the width direction of the first cells 110 , 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 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 and the second casing 52 . inside the housing 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 housing 50 includes a first housing 51 and a mounting bracket 54 , and the cell assembly 10 is accommodated in the first housing 51 ,
  • the mounting bracket 54 is disposed at the open end of the first housing 51 .
  • the mounting bracket 54 is a plastic part, the first conductive member 20 and the mounting bracket 54 are embedded and fixed by molding, or the first conductive member 20 is detachably fixed
  • the mounting bracket 54 may also be made of other non-conductive materials, and the first conductive member 20 may be fixed on the surface of the mounting bracket 54 .
  • the first welding part 21 and the second welding part 22 are exposed on the surface of the mounting bracket 54 , and the first welding part 21 is welded to at least one of the first positive electrode tab 111 and the first negative electrode tab 112 connected to each other. , the second welding part 22 is welded to at least one of the second positive electrode tabs 121 and the second negative electrode tabs 122 which 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 .
  • the circuit board is used to realize the collection and control of the cell assembly 10, and holes can also be made on the circuit board 30 to facilitate the tabs to pass through the openings, and the positive and negative electrodes can be connected on 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 of the first cell 110 . 112 respectively protrude from two adjacent first through holes 541 and are connected to the outer surface of the mounting bracket 54.
  • the second positive tab 121 and the second negative tab 122 of the adjacent second cell 120 are respectively drawn from the outer surface of the mounting bracket 54.
  • Two adjacent second through holes 542 protrude and are connected to the outer surface of the mounting bracket 54 .
  • 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 cell assembly 10 during the charging and discharging process. heat generated.
  • 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 110 and the second cell 120 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 the tab Carry out the welding operation.
  • 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 hole 24 is matched with the first positioning member 544 .
  • the first positioning member 544 is disposed between the adjacent limiting members 543. In other embodiments, 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 to support the first positive tab 111 of the outermost first cell 110
  • the second support member 547 is used to support the second negative tab 122 of the outermost second cell 120 for connection The total positive output terminal and the total negative output terminal of the battery pack 100 .
  • the inner surface of the mounting bracket 54 further includes a first positioning portion 548 and a second positioning portion 549 .
  • the first positioning portion 548 is disposed adjacent to the first through hole 541 In between, 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 110
  • the second positioning portion 549 is disposed between the tabs of the adjacent second cells 120 , so as to reduce the number of cell assemblies 10 internal 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 110
  • each of the second accommodating cavity 512 is provided with at least one of the second battery cells 120 .
  • 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 110 is accommodated in the first profiling groove 5112
  • the side of the second battery 120 is accommodated in the second profiling groove 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 recessed portion 5111 and the second recessed portion 5121 are used for accommodating glue to fix the first battery cell 110 and the second battery cell 120 .
  • 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 main body and the battery pack 100 or battery pack 200 in the above-mentioned embodiments, the battery pack 100 or battery pack 200 is provided on the main body middle.
  • 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 body is a vehicle body structure, and the battery pack 100 or battery The bag 200 is provided in 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.

Abstract

A battery pack, comprising a battery cell assembly and a plurality of first conductive members. The battery cell assembly comprises a first battery cell assembly and a second battery cell assembly, which are connected in parallel. The first battery cell assembly comprises a plurality of first battery cells arranged in a stacked manner. Each first battery cell comprises a first positive tab and a first negative tab. The first positive tabs and the first negative tabs of adjacent first battery cells are connected. The second battery cell assembly comprises a plurality of second battery cells arranged in a stacked manner. Each second battery cell comprises a second positive tab and a second negative tab. The second positive tabs and the second negative tabs of adjacent second battery cells are connected. Each first conductive member comprises a first welding portion and a second welding portion. Each first welding portion is welded to a first positive tab and a first negative tab which are connected to each other. Each second welding portion is welded to a second positive tab and a second negative tab which are connected to each other. Therefore, a connection structure is simplified, and the purposes of reducing costs and reducing the amount of occupied space are achieved. Further provided is an electric device provided with the battery pack.

Description

电池组和用电装置Battery packs and powered devices 技术领域technical field
本申请涉及电池领域,尤其涉及一种电池组和具有该电池组件的用电装置。The present application relates to the field of batteries, and in particular, to a battery pack and an electrical device having the battery assembly.
背景技术Background technique
现有技术中,单体电池在组成电池组时,通常是利用一导电铜排连接多个单体电池实现电芯的串并联。而导电铜排存在结构复杂、制造成本高、占用空间大等缺点,不利于电池组小型化发展。In the prior art, when single cells form a battery pack, a conductive copper bar is usually used to connect a plurality of single cells to realize series-parallel connection of cells. However, the conductive copper bars have disadvantages such as complex structure, high manufacturing cost, and large space occupation, which are not conducive to the miniaturization development of battery packs.
发明内容SUMMARY OF THE INVENTION
鉴于上述状况,本申请提供一种电池组和具有该电池组的用电装置,通过多个第一导电件电连接于电芯组件中的第一电芯和第二电芯之间,简化电芯之间的连接结构,达到降低成本,减少连接结构占用空间的目的。In view of the above situation, the present application provides a battery pack and an electrical device having the battery pack, which are electrically connected between the first cell and the second cell in the cell assembly through a plurality of first conductive members, thereby simplifying the electrical The connection structure between the cores achieves the purpose of reducing the cost and reducing the space occupied by the connection structure.
本申请的实施例提供一种电池组,包括电芯组件和多个第一导电件。所述电芯组件包括并联连接的第一电芯组件和第二电芯组件。所述第一电芯组件包括多个第一电芯,所述多个第一电芯沿第一电芯的厚度方向层叠设置,所述第一电芯包括第一本体部,第一正极耳和第一负极耳,所述第一正极耳和第一负极耳沿第一本体部的长度方向延伸出第一本体部,相邻所述第一电芯之间,一第一电芯的第一正极耳和另一第一电芯的第一负极耳连接。所述第二电芯组件包括多个第二电芯,所述多个第二电芯沿第二电芯的厚度方向层叠设置,所述第二电芯包括第二本体部、第二正极耳和第二负极耳,所述第二正极耳和第二负极耳沿第二本体部的长度方向延伸出第二 本体部,相邻所述第二电芯之间,一第二电芯的第二正极耳和另一第二电芯的第二负极耳连接。所述第一电芯组件和所述第二电芯组件沿所述第一电芯组件的宽度方向设置,所述第一电芯组件的宽度方向同时垂直所述第一电芯的厚度方向和长度方向。所述第一导电件包括第一焊接部和第二焊接部,所述第一焊接部焊接于相互连接第一正极耳和第一负极耳,所述第二焊接部焊接于相互连接的第二正极耳和第二负极耳。Embodiments of the present application provide a battery pack including a cell assembly and a plurality of first conductive members. The cell assembly includes a first cell assembly and a second cell assembly connected in parallel. The first cell assembly includes a plurality of first cells, the plurality of first cells are stacked along the thickness direction of the first cells, the first cells include a first body portion, a first positive electrode ear and the first negative lug, the first positive lug and the first negative lug extend out of the first body part along the length direction of the first body part; A positive tab is connected to the first negative tab of the other first battery cell. The second cell assembly includes a plurality of second cells, the plurality of second cells are stacked along the thickness direction of the second cells, and the second cells include a second body portion, a second positive electrode lug and a second negative electrode tab, the second positive electrode tab and the second negative electrode tab extend out of the second body portion along the length direction of the second body portion, and between the adjacent second battery cells, the first The two positive tabs are connected to the second negative tab of the other second battery cell. The first cell assembly and the second cell assembly are arranged along the width direction of the first cell assembly, and the width direction of the first cell assembly is perpendicular to the thickness direction and the thickness direction of the first cell at the same time. Longitudinal direction. The first conductive member includes a first welding part and a second welding part, the first welding part is welded to the first positive electrode lug and the first negative electrode lug which are connected to each other, and the second welding part is welded to the second welding part that is connected to each other. Positive tab and second negative tab.
在一些实施例中,第一电芯的第一正极耳和另一第一电芯的第一负极耳焊接连接,第二电芯的第二正极耳和另一第二电芯的第二负极焊接连接。In some embodiments, the first positive tab of the first cell is welded to the first negative tab of another first cell, and the second positive tab of the second cell is connected to the second negative tab of the other second cell. Solder connection.
在一些实施例中,所述电池组还包括电路板和第二导电件,所述第二导电件一端与第一导电件电性连接,所述第二导电件的另一端与电路板电性连接。In some embodiments, the battery pack further includes a circuit board and a second conductive member, one end of the second conductive member is electrically connected to the first conductive member, and the other end of the second conductive member is electrically connected to the circuit board connect.
在一些实施例中,所述第一电芯组件包括N个所述第一电芯,所述第二电芯组件包括N个所述第二电芯,所述电池组包括N-1个所述第一导电件,N为自然整数。In some embodiments, the first cell assembly includes N first cells, the second cell assembly includes N second cells, and the battery pack includes N−1 all In the first conductive member, N is a natural integer.
在一些实施例中,所述电池组包括N-1个所述第二导电件。In some embodiments, the battery pack includes N-1 of the second conductive members.
在一些实施例中,所述第一导电件的第一焊接部与相互连接所述第一正极耳和所述第一负极耳层叠连接,所述第一导电件的第二焊接部与相互连接所述第二正极耳和所述第二负极耳层叠连接。In some embodiments, the first welding part of the first conductive member is stacked and connected to the first positive electrode tab and the first negative electrode tab, and the second welding part of the first conductive member is connected to each other. The second positive tab and the second negative tab are stacked and connected.
在一些实施例中,所述第二导电件焊接于所述电路板。In some embodiments, the second conductive member is soldered to the circuit board.
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,缓冲部连接所述第一连接部和所述第二连接部,所述第一连接部连接所述电路板,所述第二连接部连接所述第一导电件。In some embodiments, 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, and the first connection part connects In the circuit board, the second connection portion is connected to the first conductive member.
在一些实施例中,沿所述第一电芯组件的宽度方向,所述第一电芯和所述第二电芯一一对应排列设置,其中,所述第一负极耳和所述第二负极耳设于所述第一正极耳和所述第二正极耳之间,或者, 所述第一正极耳和所述第二正极耳设于所述第一负极耳和所述第二负极耳之间。In some embodiments, along the width direction of the first cell assembly, the first cells and the second cells are arranged in a one-to-one correspondence, wherein the first negative tab and the second The negative pole is arranged between the first positive pole and the second positive pole, or, the first positive pole and the second positive pole are arranged between the first negative pole and the second negative pole between.
在一些实施例中,沿所述第一电芯组件的宽度方向,所述第一电芯和所述第二电芯一一对应排列设置,其中,所述第一负极耳和所述第二正极耳设于所述第一正极耳和所述第二负极耳之间,或者,所述第一正极耳和所述第二负极耳设于所述第一负极耳和所述第二正极耳之间。In some embodiments, along the width direction of the first cell assembly, the first cells and the second cells are arranged in a one-to-one correspondence, wherein the first negative tab and the second The positive tab is arranged between the first positive tab and the second negative tab, or the first positive tab and the second negative tab are arranged between the first negative tab and the second positive tab between.
在一些实施例中,所述电池组还包括壳体,所述壳体包括第一壳体和、第二壳体、设于第一壳体和第二壳体之间的固定支架,所述第一电芯组件收容于所述第一壳体,所述第二电芯组件收容于所述第二壳体,固定支架的相对两侧分别设有第一定位槽和第二定位槽,沿所述第一电芯组件的宽度方向,所述第一电芯的一侧固定于所述第一定位槽,所述第二电芯的一侧固定于所述第二定位槽。In some embodiments, the battery pack further includes a case, the case includes a first case and a second case, and a fixing bracket disposed between the first case and the second case, the The first battery core assembly is accommodated in the first casing, the second battery core assembly is accommodated in the second casing, and opposite sides of the fixing bracket are respectively provided with a first positioning groove and a second positioning groove, along the In the width direction of the first cell assembly, one side of the first cell is fixed to the first positioning groove, and one side of the second cell is fixed to the second positioning groove.
在一些实施例中,所述电池组还包括隔离件,所述隔离件上设有多个隔离部,所述第一导电件设置相邻所述隔离部之间。In some embodiments, the battery pack further includes a separator, a plurality of separators are provided on the separator, and the first conductive member is disposed between adjacent separators.
在一些实施例中,所述电池组还包括安装板,所述安装板上设有开口,所述第一正极耳、第一负极耳穿过所述开口并设于所述安装板远离所述电芯组件的第一表面,所述第二正极耳、第二负极耳穿过所述开口并设于所述安装板第一表面,所述第一导电件固定于所述安装板的第一表面。In some embodiments, the battery pack further includes a mounting plate, the mounting plate is provided with an opening, the first positive tab and the first negative tab pass through the opening and are disposed on the mounting plate away from the The first surface of the cell assembly, the second positive tab and the second negative tab pass through the opening and are disposed on the first surface of the mounting plate, and the first conductive member is fixed on the first surface of the mounting plate surface.
在一些实施例中,所述电池组包括第一壳体和安装支架,所述电芯组件收容于所述第一壳体,所述安装支架靠近所述电芯组件的表面设有多个第一定位部和多个第二定位部,所述第一定位部设于相邻第一电芯的极耳之间,所述第二定位部设于相邻第二电芯的极耳之间。In some embodiments, the battery pack includes a first housing and a mounting bracket, the cell assembly is accommodated in the first housing, and a surface of the mounting bracket close to the cell assembly is provided with a plurality of first A positioning portion and a plurality of second positioning portions, the first positioning portions are arranged between the tabs of the adjacent first cells, and the second positioning portions are arranged between the tabs of the adjacent second cells .
在一些实施例中,所述第一电芯和所述第二电芯为软包电芯。In some embodiments, the first cell and the second cell are soft-wrapped cells.
在一些实施例中,所述电池组还包括电路板,所述第一导电件 焊接于所述电路板。In some embodiments, the battery pack further includes a circuit board, and the first conductive member is soldered to the circuit board.
本申请的实施例还提供一种用电装置,包括上述任一项所述的电池组。Embodiments of the present application also provide an electrical device, including the battery pack described in any one of the above.
上述电池组通过多个第一导电件电连接于电芯组件中的第一电芯和第二电芯之间,取代了传统的导电铜排,简化电芯之间的连接结构,达到降低成本,减少连接结构占用空间的目的。The above-mentioned battery pack is electrically connected between the first cell and the second cell in the cell assembly through a plurality of first conductive members, which replaces the traditional conductive copper bar, simplifies the connection structure between the cells, and reduces costs. , the purpose of reducing the space occupied by the connection structure.
附图说明Description of drawings
图1为电池组在一实施例中的分解结构示意图。FIG. 1 is a schematic diagram of an exploded structure of a battery pack in an embodiment.
图2为图1所示电池组中电芯组件的立体结构示意图。FIG. 2 is a schematic three-dimensional structural diagram of a cell assembly in the battery pack shown in FIG. 1 .
图3为图2所示电芯组件的分解结构示意图。FIG. 3 is a schematic diagram of an exploded structure of the cell assembly shown in FIG. 2 .
图4为图1所示电池组中电芯组件的俯视图。FIG. 4 is a top view of the cell assembly in the battery pack shown in FIG. 1 .
图5为电芯组件在一实施例中的立体结构示意图。FIG. 5 is a schematic three-dimensional structure diagram of a cell assembly in an embodiment.
图6为图5所示电芯组件的分解结构示意图。FIG. 6 is a schematic diagram of an exploded structure of the cell assembly shown in FIG. 5 .
图7为电芯组件在一实施例中的立体结构示意图。FIG. 7 is a schematic three-dimensional structural diagram of a cell assembly in an embodiment.
图8为图7所示电芯组件的分解结构示意图。FIG. 8 is a schematic diagram of an exploded structure of the cell assembly shown in FIG. 7 .
图9为电池组在一实施例中的立体结构示意图。FIG. 9 is a schematic three-dimensional structure diagram of a battery pack in an embodiment.
图10为图9所示电池组的分解结构示意图。FIG. 10 is a schematic diagram of an exploded structure of the battery pack shown in FIG. 9 .
图11为图9所示电池组中安装支架的立体结构示意图。FIG. 11 is a schematic three-dimensional structural diagram of the mounting bracket in the battery pack shown in FIG. 9 .
图12为图11所示安装支架在另一方向上的立体结构示意。FIG. 12 is a schematic three-dimensional structure diagram of the mounting bracket shown in FIG. 11 in another direction.
图13为图9所示电池组中第一壳体的立体结构示意图。FIG. 13 is a schematic three-dimensional structural diagram of the first casing in the battery pack shown in FIG. 9 .
图14为图13所示第一壳体剪切部分结构后的结构示意图。FIG. 14 is a schematic view of the structure of the first casing shown in FIG. 13 after cutting the structure.
图15为电池包在一实施例中的结构示意图。FIG. 15 is a schematic structural diagram of a battery pack in an embodiment.
主要元件符号说明:Description of main component symbols:
电池组                   100 battery pack 100
电芯组件                 10 Cell components 10
第一电芯组件            11The first cell assembly 11
第一电芯                110The first cell 110
第一正极耳              111First positive ear 111
第一负极耳              112The first negative ear 112
第一本体部              113The first body part 113
第二电芯组件            12The second cell assembly 12
第二电芯                120The second cell 120
第二正极耳              121Second positive ear 121
第二负极耳              122Second negative ear 122
第二本体部              123The second body part 123
第一导电件              20The first conductive member 20
第一焊接部              21The first welding part 21
第二焊接部              22The second welding part 22
连接部                  23 Connection part 23
第一定位孔              24The first positioning hole 24
电路板                  30 circuit board 30
第二导电件              40The second conductive member 40
第一连接部              41The first connection part 41
第二连接部              42The second connection part 42
缓冲部                  43 Buffer 43
壳体                    50 Shell 50
第一壳体                51 first shell 51
第一收容腔              511 First Containment Chamber 511
第一凹陷部              5111The first depression 5111
第一仿形槽              5112The first profiling slot 5112
第二收容腔              512 Second Containment Chamber 512
第二凹陷部              5121The second depression 5121
第二仿形槽               5122The second profiling slot 5122
第二壳体                 52 second shell 52
固定支架                 53 Fixed bracket 53
第一定位槽               531The first positioning groove 531
第二定位槽               532The second positioning slot 532
安装支架                 54Mounting bracket 54
第一通孔                 541The first through hole 541
第二通孔                 542The second through hole 542
限位件                   543Limiting piece 543
第一定位件               544The first positioning piece 544
散热口                   545 Radiator 545
第一支撑件               546The first support piece 546
第二支撑件               547 Second support 547
第一定位部               548The first positioning part 548
第二定位部               549The second positioning part 549
隔离件                   60 Spacer 60
隔离部                   61 Isolation Department 61
安装板                   70Mounting plate 70
开口                     71 Opening 71
电池包                   200 Battery pack 200
外壳                     201 Shell 201
连接器                   202 Connector 202
具体实施方式:Detailed ways:
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。The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all of the embodiments.
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。It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. When an element is referred to as being "disposed on" another element, it can be directly disposed on the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and similar expressions are used herein for illustrative purposes only.
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。Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which this application belongs. The terms used herein in the specification of the present application are for the purpose of describing particular embodiments only, and are not intended to limit the present application. As used herein, the term "or/and" includes any and all combinations of one or more of the associated listed items.
本申请实施例提供了一种电池组,包括电芯组件和多个第一导电件。所述电芯组件包括并联连接的第一电芯组件和第二电芯组件。所述第一电芯组件包括多个第一电芯,所述多个第一电芯沿第一电芯的厚度方向层叠设置,所述第一电芯包括第一本体部,第一正极耳和第一负极耳,所述第一正极耳和第一负极耳沿第一本体部的长度方向延伸出第一本体部,相邻所述第一电芯之间,一第一电芯的第一正极耳和另一第一电芯的第一负极耳连接。所述第二电芯组件包括多个第二电芯,所述多个第二电芯沿第二电芯的厚度方向层叠设置,所述第二电芯包括第二本体部、第二正极耳和第二负极耳,所述第二正极耳和第二负极耳沿第二本体部的长度方向延伸出第二本体部,相邻所述第二电芯之间,一第二电芯的第二正极耳和另一第二电芯的第二负极耳连接。所述第一电芯组件和所述第二电芯组件沿所述第一电芯组件的宽度方向设置,所述第一电芯组件的宽度方向同时垂直所述第一电芯的厚度方向和长度方向。所述第一导电件的一端焊接于相互连接第一正极耳和第一负极耳,所述第一导电 件的另一端焊接于相互连接的第二正极耳和第二负极耳。An embodiment of the present application provides a battery pack, which includes a cell assembly and a plurality of first conductive members. The cell assembly includes a first cell assembly and a second cell assembly connected in parallel. The first cell assembly includes a plurality of first cells, the plurality of first cells are stacked along the thickness direction of the first cells, the first cells include a first body portion, a first positive electrode ear and the first negative lug, the first positive lug and the first negative lug extend out of the first body part along the length direction of the first body part; A positive tab is connected to the first negative tab of the other first battery cell. The second cell assembly includes a plurality of second cells, the plurality of second cells are stacked along the thickness direction of the second cells, and the second cells include a second body portion, a second positive electrode lug and a second negative electrode tab, the second positive electrode tab and the second negative electrode tab extend out of the second body portion along the length direction of the second body portion, and between the adjacent second battery cells, the first The two positive tabs are connected to the second negative tab of the other second battery cell. The first cell assembly and the second cell assembly are arranged along the width direction of the first cell assembly, and the width direction of the first cell assembly is perpendicular to the thickness direction and the thickness direction of the first cell at the same time. Longitudinal direction. One end of the first conductive member is welded to the mutually connected first positive electrode tab and the first negative electrode tab, and the other end of the first conductive member is welded to the mutually connected second positive electrode tab and the second negative electrode tab.
上述电池组通过多个第一导电件电连接于电芯组件中的第一电芯和第二电芯之间,取代了传统的导电铜排,简化电芯之间的连接结构,达到降低成本,减少连接结构占用空间的目的。The above-mentioned battery pack is electrically connected between the first cell and the second cell in the cell assembly through a plurality of first conductive members, which replaces the traditional conductive copper bar, simplifies the connection structure between the cells, and reduces costs. , the purpose of reducing the space occupied by the connection structure.
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。Some embodiments of the present application are described in detail. The following embodiments and features of the embodiments may be combined with each other without conflict.
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1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。所述电芯组件10收容于所述壳体50内。Referring to FIGS. 1 and 2 , 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 11 and the second cell assembly 12 are along the first cell assembly 11 . width direction setting. The width direction of the first cell assembly 11 is the direction indicated by arrow A in FIG. 1 . 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 , and the other end of the second conductive member 40 is electrically connected to the circuit board 30 . The cell assembly 10 is accommodated in the casing 50 .
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。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 .
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。In some implementations of the present application, 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. In FIG. 1 , the direction indicated by arrow B is the length direction of the first cell 110 , and the direction indicated by arrow C is the thickness direction of the first cell 110 .
请继续参阅图3,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。Please continue to refer to FIG. 3 , 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 connected to each other, and the second welding portion 22 is welded to the mutually connected second positive electrode tab 121 and the second negative electrode tab 122 . Specifically, 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 . In this embodiment, 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 . In this embodiment, 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 .
在本申请的其中一个实施例中,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。In one of the embodiments of the present application, 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 .
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。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. In a single circuit unit, when 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. out (the direction of discharge), and pour into the lower voltage cell (the direction of charging), so as to equalize the voltages of the first cell 110 and the second cell 120 and reduce the size of the first cell 110 and the second cell 120 It ensures that 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. In addition, according to Ohm's law of circuitry, 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 . In addition, compared with the method of connecting copper bars and welding multiple tabs, 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.
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。In this embodiment, the first conductive member 20 is a copper bar. In other embodiments, 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.
请再次参阅图3,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。Referring to FIG. 3 again, in some embodiments, 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. In some embodiments, the battery pack 100 further includes a spacer 60 disposed between the cell assembly 10 and the circuit board 30 . Along the thickness direction of the first cell 110 , 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.
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。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 , and the second connection portion 42 is connected to the first conductive member 20 . In this embodiment, 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. In other embodiments, 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. In the battery pack 100 , 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 .
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。The first conductive member 20 is mainly used to balance the voltage between the parallel cells, and 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.
请参阅图4,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,请参阅图7,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。Referring to FIG. 4 , in one of the embodiments of the present application, the first cells 110 and the second cells 120 are arranged in a one-to-one correspondence along the width direction of the first cells 110 , 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 arranged 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; or, please Referring to FIG. 7 , the first positive electrode tab 111 and the second positive electrode tab 121 are arranged between the first negative electrode tab 112 and the second negative electrode tab 122 to connect the first battery cell assembly 11 and the second battery pack The lengths of the plurality of first conductive members 20 of the core assembly 12 are not equal.
请参阅图5和图6,在一些实施例中,所述电池组100还包括安装板70,设置于所述电芯组件10的顶面。所述安装板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穿过所述安装板70上的开口71,并连接于安装板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穿过所述安装板70上的开口71,并连接于安装板70背离所述电芯组件10的第一表面。所述安装板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板70背离所述电芯组件10的第一表面。Referring to FIGS. 5 and 6 , in some embodiments, the battery pack 100 further includes a mounting plate 70 disposed on the top surface of the cell assembly 10 . The mounting plate 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 plate 70 and are connected to the first surface of the mounting plate 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 plate 70 and are connected to the first surface of the mounting plate 70 facing away from the cell assembly 10 . The mounting plate 70 is a non-conductive member. The first conductive member 20 can be fixed on the first surface of the mounting plate 70 away from the cell assembly 10 by means of riveting, bonding, or the like.
请参阅图7和图8,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。Referring to FIG. 7 and FIG. 8 , in another embodiment, the first cells 110 and the second cells 120 are arranged in a one-to-one correspondence along the width direction of the first cells 110 , 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.
请再次参阅图1和4,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,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。Please refer to FIGS. 1 and 4 again, 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 and the second casing 52 . inside the housing 52 . Specifically, the first cell assembly 11 is accommodated in the first casing 51 , and 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 . Along the width direction of the first cell assembly 11 , 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 . Along the width direction of the cell assembly 10 , 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 .
请参阅图9和图10,在本申请的另一实施例中,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。在本申请的其中一个实施例中,所述安装支架54为塑胶件,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的表面。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表面,所述第一焊接部21焊接于相互连接第一正极耳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。Referring to FIG. 9 and FIG. 10 , in another embodiment of the present application, the housing 50 includes a first housing 51 and a mounting bracket 54 , and the cell assembly 10 is accommodated in the first housing 51 , The mounting bracket 54 is disposed at the open end of the first housing 51 . In one embodiment of the present application, the mounting bracket 54 is a plastic part, the first conductive member 20 and the mounting bracket 54 are embedded and fixed by molding, or the first conductive member 20 is detachably fixed For the mounting bracket 54 , in other embodiments, the mounting bracket 54 may also be made of other non-conductive materials, and the first conductive member 20 may be fixed on the surface of the mounting bracket 54 . The first welding part 21 and the second welding part 22 are exposed on the surface of the mounting bracket 54 , and the first welding part 21 is welded to at least one of the first positive electrode tab 111 and the first negative electrode tab 112 connected to each other. , the second welding part 22 is welded to at least one of the second positive electrode tabs 121 and the second negative electrode tabs 122 which are connected to each other.
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。In some embodiments, 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.
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,并于电路板30的外表面实施正负极耳的连接,以串联相邻电芯。In this example, the circuit board 30 is a circuit board provided with a battery management system. In other embodiments, the first conductive member 20 can be directly welded on the circuit board 30 , and a circuit board 30 is provided with a circuit board connected to the first conductive member 20 . The circuit board is used to realize the collection and control of the cell assembly 10, and holes can also be made on the circuit board 30 to facilitate the tabs to pass through the openings, and the positive and negative electrodes can be connected on the outer surface of the circuit board 30 to connect in series. adjacent cells.
请继续参阅图11,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110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,并于所述安装支架54的外表面连接,相邻所述第二电芯120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,并于所述安装支架54的外表面连接。沿第一电芯110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。Please continue to refer to FIG. 11 , 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 of the first cell 110 . 112 respectively protrude from two adjacent first through holes 541 and are connected to the outer surface of the mounting bracket 54. The second positive tab 121 and the second negative tab 122 of the adjacent second cell 120 are respectively drawn from the outer surface of the mounting bracket 54. Two adjacent second through holes 542 protrude and are connected to the outer surface of the mounting bracket 54 . Along the stacking direction of the first battery cells 110 , 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 cell assembly 10 during the charging and discharging process. heat generated.
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110和第二电芯120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。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 110 and the second cell 120 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 the tab Carry out the welding operation. 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 .
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110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,所述第一定位孔24与所述第一定位件544配合。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11,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用于支撑最外侧第一电芯110的第一正极耳111,所述第二支撑件547用于支撑最外侧第二电芯120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。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. Along the stacking direction of the first cells 110 , 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 hole 24 is matched with the first positioning member 544 . In this embodiment, the first positioning member 544 is disposed between the adjacent limiting members 543. In other embodiments, the first positioning member 544 is disposed at other parts of the mounting bracket 54. In addition, The first conductive member 20 may also be fixed to the mounting bracket 54 by thermally melting the first positioning member 544 . Referring to FIG. 11 again, in some embodiments, 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 to support the first positive tab 111 of the outermost first cell 110 , and the second support member 547 is used to support the second negative tab 122 of the outermost second cell 120 for connection The total positive output terminal and the total negative output terminal of the battery pack 100 .
请参阅图12,在一些实施例中,所述安装支架54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110的极耳之间,所述第二定位部549设于相邻第二电芯120的极耳之间,以减少电芯组件10的内短路问题。Referring to FIG. 12 , in some embodiments, the inner surface of the mounting bracket 54 further includes a first positioning portion 548 and a second positioning portion 549 . The first positioning portion 548 is disposed adjacent to the first through hole 541 In between, 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 110 , and the second positioning portion 549 is disposed between the tabs of the adjacent second cells 120 , so as to reduce the number of cell assemblies 10 internal short circuit problem.
请参阅图13,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110,每一所述第二收容腔512内设有至少一个所述第二电芯120。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110的侧边收容于所述第一仿形槽5112,所述第二电芯120的侧边收容于所述第二仿形槽5122。Referring to FIG. 13 , in some embodiments, 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 110 , and each of the second accommodating cavity 512 is provided with at least one of the second battery cells 120 . The side wall of the first receiving cavity 511 is provided with a first profile groove 5112 , and the side wall of the second containing cavity 512 is provided with a second profile groove 5122 . The side of the first cell 110 is accommodated in the first profiling groove 5112 , and the side of the second battery 120 is accommodated in the second profiling groove 5122 .
请参阅图14,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用于收容胶水,以固定所述第一电芯110和所述第二电芯120。Referring to FIG. 14 , in some embodiments, a first concave portion 5111 is disposed at the bottom of the first receiving cavity 511 , and a second concave portion 5121 is disposed at the bottom of the second receiving cavity 512 . The first recessed portion 5111 and the second recessed portion 5121 are used for accommodating glue to fix the first battery cell 110 and the second battery cell 120 .
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。Referring to FIG. 15 , 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 .
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,所述电池组100或电池包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,所述电池组100或电池包200设于所述车体内,以进行供电。The present application also provides an electrical device (not shown), the electrical device includes a main body and the battery pack 100 or battery pack 200 in the above-mentioned embodiments, the battery pack 100 or battery pack 200 is provided on the main body middle. Further, 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. Correspondingly, the body is a vehicle body structure, and the battery pack 100 or battery The bag 200 is provided in the vehicle body for power supply.
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。It can be understood that, in other embodiments, the electrical device may also be a hand-held electrical device, such as a vacuum cleaner, a lawn mower and other devices.
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。The above embodiments are only used to illustrate the technical solutions of the present application rather than limitations. Although the present application has been described in detail with reference to the above preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present application can be modified or equivalently replaced. Neither should depart from the spirit and scope of the technical solutions of the present application.

Claims (17)

  1. 一种电池组,包括:A battery pack comprising:
    电芯组件,包括并联连接的第一电芯组件和第二电芯组件;a cell assembly, including a first cell assembly and a second cell assembly connected in parallel;
    所述第一电芯组件包括多个第一电芯,所述多个第一电芯沿第一电芯的厚度方向层叠设置,所述第一电芯包括第一本体部,第一正极耳和第一负极耳,所述第一正极耳和第一负极耳沿第一本体部的长度方向延伸出第一本体部,相邻所述第一电芯之间,一第一电芯的第一正极耳和另一第一电芯的第一负极耳连接;The first cell assembly includes a plurality of first cells, the plurality of first cells are stacked along the thickness direction of the first cells, the first cells include a first body portion, a first positive electrode ear and the first negative lug, the first positive lug and the first negative lug extend out of the first body part along the length direction of the first body part; A positive ear is connected to the first negative ear of the other first cell;
    所述第二电芯组件包括多个第二电芯,所述多个第二电芯沿第二电芯的厚度方向层叠设置,所述第二电芯包括第二本体部、第二正极耳和第二负极耳,所述第二正极耳和第二负极耳沿第二本体部的长度方向延伸出第二本体部,相邻所述第二电芯之间,一第二电芯的第二正极耳和另一第二电芯的第二负极耳连接;The second cell assembly includes a plurality of second cells, the plurality of second cells are stacked along the thickness direction of the second cells, and the second cells include a second body portion, a second positive electrode lug and a second negative electrode tab, the second positive electrode tab and the second negative electrode tab extend out of the second body portion along the length direction of the second body portion, and between the adjacent second battery cells, the first The two positive lugs are connected to the second negative lug of the other second battery cell;
    其特征在于,所述第一电芯组件和所述第二电芯组件沿所述第一电芯组件的宽度方向设置,所述第一电芯组件的宽度方向同时垂直所述第一电芯的厚度方向和长度方向,所述电池组还包括多个第一导电件,所述第一导电件包括第一焊接部和第二焊接部,所述第一焊接部焊接于相互连接第一正极耳和第一负极耳,所述第二焊接部焊接于相互连接的第二正极耳和第二负极耳。It is characterized in that the first cell assembly and the second cell assembly are arranged along the width direction of the first cell assembly, and the width direction of the first cell assembly is perpendicular to the first cell at the same time. The thickness direction and the length direction of the battery pack further include a plurality of first conductive parts, the first conductive parts include a first welding part and a second welding part, and the first welding part is welded to the first positive electrode connected to each other. ear and the first negative ear, the second welding part is welded to the second positive ear and the second negative ear which are connected to each other.
  2. 如权利要求1所述的电池组,其特征在于,第一电芯的第一正极耳和另一第一电芯的第一负极耳焊接连接,第二电芯的第二正极耳和另一第二电芯的第二负极焊接连接。The battery pack of claim 1, wherein the first positive tab of the first cell is connected to the first negative tab of the other first cell by welding, and the second positive tab of the second cell is connected to the other The second negative electrode of the second cell is connected by welding.
  3. 如权利要求1所述的电池组,其特征在于,所述电池组还包括电路板和第二导电件,所述第二导电件一端与第一导电件电性连接,所述第二导电件的另一端与电路板电性连接。The battery pack according to claim 1, wherein the battery pack further comprises a circuit board and a second conductive member, one end of the second conductive member is electrically connected to the first conductive member, and the second conductive member is electrically connected to the first conductive member. The other end is electrically connected to the circuit board.
  4. 如权利要求3所述的电池组,其特征在于,所述第一电芯组件包括N个所述第一电芯,所述第二电芯组件包括N个所述第二电芯, 所述电池组包括N-1个所述第一导电件,N为自然整数。The battery pack according to claim 3, wherein the first cell assembly includes N first cells, the second cell assembly includes N second cells, and the The battery pack includes N-1 first conductive members, where N is a natural integer.
  5. 如权利要求4所述的电池组,其特征在于,所述电池组包括N-1个所述第二导电件。The battery pack of claim 4, wherein the battery pack comprises N-1 pieces of the second conductive members.
  6. 如权利要求3-5任意一项所述的电池组,其特征在于,所述第一导电件的第一焊接部与相互连接所述第一正极耳和所述第一负极耳层叠连接,所述第一导电件的第二焊接部与相互连接所述第二正极耳和所述第二负极耳层叠连接。The battery pack according to any one of claims 3 to 5, wherein the first welding portion of the first conductive member is stacked and connected to the first positive electrode tab and the first negative electrode tab, so The second welding part of the first conductive member is stacked and connected to the second positive electrode tab and the second negative electrode tab which are connected to each other.
  7. 如权利要求6所述的电池组,其特征在于,所述第二导电件焊接于所述电路板。The battery pack of claim 6, wherein the second conductive member is welded to the circuit board.
  8. 如权利要求6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,缓冲部连接所述第一连接部和所述第二连接部,所述第一连接部连接所述电路板,所述第二连接部连接所述第一导电件。The battery pack according to claim 6, wherein the second conductive member comprises a first connection part, a buffer part and a second connection part, and the buffer part connects the first connection part and the second connection part , the first connection portion is connected to the circuit board, and the second connection portion is connected to the first conductive member.
  9. 如权利要求6所述的电池组,其特征在于,沿所述第一电芯的宽度方向,所述第一电芯和所述第二电芯一一对应排列设置,其中,所述第一负极耳和所述第二负极耳设于所述第一正极耳和所述第二正极耳之间,或者,所述第一正极耳和所述第二正极耳设于所述第一负极耳和所述第二负极耳之间。The battery pack according to claim 6, wherein the first cells and the second cells are arranged in a one-to-one correspondence along the width direction of the first cells, wherein the first cells The negative electrode lug and the second negative electrode lug are arranged between the first positive electrode lug and the second positive electrode lug, or the first positive electrode lug and the second positive electrode lug are arranged on the first negative electrode lug and the second negative lug.
  10. 如权利要求6所述的电池组,其特征在于,沿所述第一电芯的宽度方向,所述第一电芯和所述第二电芯一一对应排列设置,其中,所述第一负极耳和所述第二正极耳设于所述第一正极耳和所述第二负极耳之间,或者,所述第一正极耳和所述第二负极耳设于所述第一负极耳和所述第二正极耳之间。The battery pack according to claim 6, wherein the first cells and the second cells are arranged in a one-to-one correspondence along the width direction of the first cells, wherein the first cells The negative electrode lug and the second positive electrode lug are arranged between the first positive electrode lug and the second negative electrode lug, or the first positive electrode lug and the second negative electrode lug are arranged on the first negative electrode lug and the second positive lug.
  11. 如权利要求1所述的电池组,其特征在于,所述电池组还包括壳体,所述壳体包括第一壳体、第二壳体、设于第一壳体和第二壳体之间的固定支架,所述第一电芯组件收容于所述第一壳体,所述第二电芯组件收容于所述第二壳体,固定支架的相对两侧分别设有 第一定位槽和第二定位槽,沿所述第一电芯组件的宽度方向,所述第一电芯的一侧固定于所述第一定位槽,所述第二电芯的一侧固定于所述第二定位槽。The battery pack according to claim 1, wherein the battery pack further comprises a casing, the casing comprises a first casing, a second casing, a casing disposed between the first casing and the second casing The first battery core assembly is accommodated in the first casing, the second battery core assembly is accommodated in the second casing, and the opposite sides of the fixing bracket are respectively provided with first positioning grooves and a second positioning slot, along the width direction of the first cell assembly, one side of the first cell is fixed to the first positioning slot, and one side of the second cell is fixed to the first cell Two positioning slots.
  12. 如权利要求1所述的电池组,其特征在于,所述电池组还包括隔离件,所述隔离件上设有多个隔离部,所述第一导电件设置相邻所述隔离部之间。The battery pack according to claim 1, wherein the battery pack further comprises a separator, a plurality of separators are provided on the separator, and the first conductive member is disposed between adjacent separators .
  13. 如权利要求1所述的电池组,其特征在于,所述电池组还包括安装板,所述安装板上设有开口,所述第一正极耳、第一负极耳穿过所述开口并设于所述安装板远离所述电芯组件的第一表面,所述第二正极耳、第二负极耳穿过所述开口并设于所述安装板第一表面,所述第一导电件固定于所述安装板的第一表面。The battery pack according to claim 1, wherein the battery pack further comprises a mounting plate, the mounting plate is provided with an opening, the first positive electrode tab and the first negative electrode tab pass through the opening and are provided with an opening. On the first surface of the mounting plate away from the cell assembly, the second positive electrode tab and the second negative electrode tab pass through the opening and are disposed on the first surface of the mounting plate, and the first conductive member is fixed on the first surface of the mounting plate.
  14. 如权利要求1所述的电池组,其特征在于,所述电池组包括第一壳体和安装支架,所述电芯组件收容于所述第一壳体,所述安装支架靠近所述电芯组件的表面设有多个第一定位部和多个第二定位部,所述第一定位部设于相邻第一电芯的极耳之间,所述第二定位部设于相邻第二电芯的极耳之间。The battery pack according to claim 1, wherein the battery pack comprises a first casing and a mounting bracket, the cell assembly is accommodated in the first casing, and the mounting bracket is close to the battery cells The surface of the assembly is provided with a plurality of first positioning parts and a plurality of second positioning parts, the first positioning parts are set between the tabs of the adjacent first battery cells, and the second positioning parts are set at the adjacent Between the tabs of the two batteries.
  15. 如权利要求1所述的电池组,其特征在于,所述第一电芯和所述第二电芯为软包电芯。The battery pack according to claim 1, wherein the first cell and the second cell are soft-wrapped cells.
  16. 如权利要求15所述的电池组,其特征在于,所述电池组还包括电路板,所述第一导电件焊接于所述电路板。The battery pack of claim 15, wherein the battery pack further comprises a circuit board, and the first conductive member is welded to the circuit board.
  17. 一种用电装置,其特征在于,包括权利要求1-16任一项所述的电池组。An electrical device, characterized by comprising the battery pack according to any one of claims 1-16.
PCT/CN2020/132893 2020-11-30 2020-11-30 Battery pack and electric device WO2022110192A1 (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101938017A (en) * 2010-04-28 2011-01-05 浙江绿源电动车有限公司 Battery device
CN202712292U (en) * 2012-06-28 2013-01-30 南京德朔实业有限公司 Battery pack system and electric tool applying same
CN203367435U (en) * 2013-05-22 2013-12-25 许玉林 Parallel connection lithium battery module
CN210628382U (en) * 2019-11-19 2020-05-26 宁德时代新能源科技股份有限公司 Laminate polymer battery module, battery package and use laminate polymer battery module as equipment of power

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101938017A (en) * 2010-04-28 2011-01-05 浙江绿源电动车有限公司 Battery device
CN202712292U (en) * 2012-06-28 2013-01-30 南京德朔实业有限公司 Battery pack system and electric tool applying same
CN203367435U (en) * 2013-05-22 2013-12-25 许玉林 Parallel connection lithium battery module
CN210628382U (en) * 2019-11-19 2020-05-26 宁德时代新能源科技股份有限公司 Laminate polymer battery module, battery package and use laminate polymer battery module as equipment of power

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