WO2023115494A1 - 电池组、用电设备及制造方法 - Google Patents

电池组、用电设备及制造方法 Download PDF

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Publication number
WO2023115494A1
WO2023115494A1 PCT/CN2021/141001 CN2021141001W WO2023115494A1 WO 2023115494 A1 WO2023115494 A1 WO 2023115494A1 CN 2021141001 W CN2021141001 W CN 2021141001W WO 2023115494 A1 WO2023115494 A1 WO 2023115494A1
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WO
WIPO (PCT)
Prior art keywords
cell
circuit board
battery pack
along
cells
Prior art date
Application number
PCT/CN2021/141001
Other languages
English (en)
French (fr)
Inventor
彭芳桂
刘小平
杨鹏程
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/CN2021/141001 priority Critical patent/WO2023115494A1/zh
Priority to CN202180105241.0A priority patent/CN118435440A/zh
Publication of WO2023115494A1 publication Critical patent/WO2023115494A1/zh

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/258—Modular batteries; Casings provided with means for assembling
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/284—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders with incorporated circuit boards, e.g. printed circuit boards [PCB]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • the present application relates to the technical field of energy storage, and in particular to a battery pack, electrical equipment and a manufacturing method.
  • a battery pack generally includes multiple cells and circuit boards, the cells are connected to the circuit board, and the cells and circuit boards may move during use or transportation, affecting the use of the battery pack.
  • An embodiment of the present application provides a battery pack, including a case assembly, a cell assembly, a first circuit board, a first connecting part and a first insulating part.
  • the cell assembly is arranged in the shell assembly.
  • the cell assembly includes a first row of cells stacked along a first direction and a second row of cells stacked along the first direction.
  • the cells in the first row and the cells in the second row are arranged at intervals along the second direction.
  • a first channel is provided between the cells in the first row and the cells in the second row.
  • the second direction is perpendicular to the first direction.
  • the first circuit board is connected to the cell assembly, and the first channel extends to the first circuit board.
  • the first connecting part is arranged in the casing component.
  • the first insulating part is used for adhesively connecting the cell assembly, the first circuit board and the first connecting part.
  • the first channel extends to the first circuit board, so that the first insulator passes through the first channel to connect the cell assembly, the first circuit board and the first circuit board.
  • the first connecting piece is adhesively connected to better fix the battery core.
  • both the projection of the first circuit board and the projection of the cell assembly overlap with the projection of the first insulator, and the first circuit board and the first insulator are connected to each other by the first insulator.
  • the cell assembly is insulated and fixed.
  • the cell includes a cell casing, an electrode assembly disposed in the cell casing, and an electrode terminal connected to the electrode assembly and drawn out from the cell casing.
  • the first insulator is bonded to the part of the electrode terminal protruding from the cell casing, and insulates the protruding part of the electrode terminal to strengthen the fixing of the electrode terminal.
  • the projection portion of the electrode terminal is located within the projection of the first insulating member.
  • the first insulator covers a portion of the electrode terminal.
  • the electrode terminals can be fixed and insulated, and the electrode terminals can be dissipated.
  • the cell casing includes a first part and a second part.
  • the first part houses the electrode assembly.
  • the second part connects to the first part.
  • Electrode terminals protrude from the second portion.
  • the first insulator is bonded to at least part of the second portion.
  • the electrode terminals are further insulated, the fixing of the electrode terminals is further strengthened, and the heat dissipation of the electrode terminals is further improved.
  • the cell assembly further includes a second connecting member
  • the first column of cells includes a plurality of first cell groups.
  • the second column of cells includes a plurality of second cell groups.
  • the second connecting piece connects at least one surface of the first cell group and the second cell group along the first direction. The second connecting piece is in contact with the electric core to dissipate heat from the electric core.
  • the second connecting member includes a first component
  • the first component includes a first section and a third section.
  • the first section is disposed between adjacent first cell groups.
  • the third section is disposed between the adjacent second cell groups.
  • the first part further includes a second section, the second section is arranged in the gap between the first cell group and the second cell group along the second direction, and is connected In the first section and the third section, the whole second space can be used as the first channel for glue filling.
  • a third connecting member is also included, the third connecting member is arranged in the gap between the first cell group and the second cell group along the second direction, and connects the second area section, the second section can divide the second space into multiple first channels, and the glue potting equipment can inject flowing insulating material through the multiple first channels to improve efficiency.
  • the cell assembly further includes a first structural member.
  • the first structural member includes a first segment and a second segment.
  • the first segment connects the first component.
  • the first segment is located between adjacent first cell groups.
  • the second section connects the first part.
  • the second segment is located between adjacent second cell groups.
  • the first structural member may provide an expansion space for the electric core.
  • the first structural member includes foam with a micro closed-cell structure, and the insulating material that restricts injection flow is bonded to the first structural member.
  • the first structural member further includes a third segment connecting the first segment and the second segment.
  • the third section is disposed in a gap between the first cell group and the second cell group along the second direction.
  • the third section is connected to the second connecting piece.
  • the first circuit board is provided with a first communication hole.
  • the first insulating part can flow into between the first connecting part and the first circuit board from the first communication hole.
  • the first communication hole allows the first insulating member to flow into the first connecting member, thereby improving the efficiency of injecting the first insulating member into the battery pack.
  • the first circuit board is provided with a first through hole.
  • the third direction at least part of the projection of the first through hole lies within the projection of the first channel.
  • the third direction is perpendicular to the first direction and the second direction.
  • the first through hole allows the first insulator to flow into the battery pack, thereby improving the efficiency of injecting the first insulator into the battery pack.
  • the first connecting piece is provided with a third space.
  • the first circuit board is arranged in the third space.
  • the first connecting member includes a first main body and a first protrusion connected to the first main body.
  • the first protrusion includes a plurality of connecting walls.
  • the first body and the plurality of connection walls form a third space.
  • the first body and the first circuit board are oppositely arranged, and the third direction is perpendicular to the first direction and the second direction.
  • the projection of the first protrusion overlaps with the projection of the first circuit board.
  • the projection of the first protrusion overlaps with the projection of the first circuit board.
  • the projection of the first protrusion overlaps with the projection of the electrode terminal, which can insulate the electrode terminal.
  • the projection of the welding part is located within the projection of the first convex part, so as to further strengthen the insulation.
  • a second insulating member and a first electrical connection part connected to the cell assembly are further included.
  • the first connecting piece includes a first opening and a second convex portion disposed on the first body.
  • the second convex part is provided with a second convex part opening and the second convex part opening communicates with the first opening.
  • the first electrical connection part extends to a side of the first connecting member away from the first circuit board after passing through the first opening and the opening of the second convex part.
  • the second insulator is disposed in the gap between the first opening and the first electrical connection part, and insulates the first electrical connection part through the second convex part, reducing the risk of short circuit of the part where the first electrical connection part is connected to the first circuit board .
  • a first protrusion is provided on a surface of the first connecting member close to the first circuit board.
  • the first protrusion is connected to the first circuit board.
  • a first insulator is disposed in the first gap.
  • the third direction is perpendicular to the first direction and the second direction at the same time, so that the first insulating member can flow into the first gap, the first connecting member can be bonded to the welding part through the first insulating member, and the welding part can also be insulated.
  • the length of the first channel is 6mm-30mm, and/or along the second direction, the length of the first channel is 6mm-80mm.
  • the first insulating member is formed by injecting flowing insulating material into the battery pack through the first channel and curing it.
  • An embodiment of the present application also provides an electric device, including the battery pack in any of the above embodiments.
  • An embodiment of the present application also provides a method for manufacturing a battery pack in any of the above embodiments, including the following steps: assembling a cell assembly, a first circuit board, and a first connector.
  • the cell assembly includes a first row of cells stacked along a first direction and a second row of cells stacked along the first direction.
  • the cells in the first row and the cells in the second row are arranged at intervals along the second direction.
  • a first channel is provided between the cells in the first row and the cells in the second row. Place the cell assembly, the first circuit board, and the first connector upside down.
  • Flowing insulating material is injected into the side of the cell assembly away from the first circuit board through the first channel, and the insulating material is cured to form the first insulating member. After the first insulator is cured, the cell assembly, the first circuit board and the first connector are arranged in the housing assembly.
  • the battery pack, the manufacturing method of the battery pack, and the electrical equipment described above are provided with a first channel between the cells in the first row and the cells in the second row, and the first channel extends to the first circuit board, so that the first insulating member
  • the battery core assembly, the first circuit board and the first connecting member are adhesively connected through the first channel to better fix the battery core.
  • Fig. 1 shows a schematic structural diagram of a battery pack in some embodiments.
  • Figure 2 shows an exploded schematic view of a battery pack in some embodiments.
  • Fig. 3 shows a schematic structural diagram of a second housing and a second circuit board in some embodiments.
  • Fig. 4 shows a schematic structural diagram of a cell assembly and a first connecting member in some embodiments.
  • Fig. 5 shows a sectional view of the battery pack along II-II in Fig. 1 .
  • FIG. 6 shows a partially enlarged view of the battery pack in FIG. 5 .
  • Fig. 7 shows a sectional view along II-II of the battery pack in some other embodiments.
  • FIG. 8 shows a partially enlarged view of the battery pack in FIG. 7 .
  • Fig. 9 shows a schematic structural diagram of a single cell in some embodiments.
  • Figure 10 shows an exploded schematic diagram of a single cell in some embodiments.
  • Fig. 11 shows a schematic structural diagram of a cell assembly in some embodiments.
  • Figure 12 shows an exploded schematic view of the battery pack in some embodiments, minus the housing assembly.
  • Fig. 13 shows a schematic diagram of the partial structure of the battery pack in some embodiments.
  • Fig. 14 shows a schematic structural diagram of multiple second connectors in some embodiments.
  • Fig. 15 shows a partial structure diagram of a battery pack from another perspective in some embodiments.
  • Fig. 16 shows a schematic structural diagram of an upside-down arrangement in other embodiments.
  • Fig. 17 shows a schematic structural view of the cell assembly in some other embodiments.
  • Figure 18 shows a schematic diagram of the structure of the battery pack section in some embodiments.
  • Fig. 19 shows a schematic diagram of the partial structure of the battery pack in other embodiments.
  • Fig. 20 shows a schematic structural diagram of a battery cell assembly, a first circuit board and a second connector in some embodiments.
  • Fig. 21 shows a schematic diagram of the structure of the first circuit board in some embodiments.
  • Fig. 22 shows a schematic structural view of the first circuit board provided with the first conductive sheet and the second conductive sheet in some embodiments.
  • Fig. 23 shows a schematic structural view of the first circuit board and the battery core in some embodiments.
  • Fig. 24 shows a sectional view along IV-IV of Fig. 4 .
  • Fig. 25 shows a schematic structural view of the first circuit board and the electric core from another perspective in some embodiments.
  • Fig. 26 shows a schematic diagram of the structure of the battery cell connected to the first circuit board in some embodiments.
  • Fig. 27 shows a schematic structural diagram of the first connecting member in some embodiments.
  • Fig. 28 shows a schematic structural diagram of the first connecting member from another perspective in some embodiments.
  • Fig. 29 shows a schematic structural diagram of the first connecting member from another perspective in some embodiments.
  • Fig. 30 shows a schematic view of the structure of the battery pack in some embodiments without the first casing and the second casing.
  • FIG. 31 shows a schematic cross-sectional view along III-III of the battery pack in FIG. 30 with the first casing and the second casing removed.
  • FIG. 32 shows a partially enlarged view of the cross-sectional view in FIG. 31 .
  • Fig. 33 shows a sectional view along III-III of the battery pack with the first casing and the second casing removed in another embodiment.
  • FIG. 34 shows an enlarged partial view of the cross-sectional view in FIG. 33 .
  • Figure 35 shows a flowchart of a method of manufacturing a battery pack in some embodiments.
  • Fig. 36 shows a schematic structural diagram of an electrical device in some embodiments.
  • the first channel 20a The first branch channel 20a-1
  • the first terminal 212b The first terminal 212b
  • the first convex part 41 is the first convex part 41
  • the first connecting wall 411 is connected to The first connecting wall 411
  • the third convex part 45 is the third convex part 45.
  • the first insulation department 72 The first insulation department 72
  • a component When a component is said to be “set on” another component, it can be set directly on another component or there may be an intervening component at the same time.
  • a component When a component is said to be “connected” to another component, it may be directly connected to the other component or there may be an intervening component at the same time.
  • an embodiment of the present application provides a battery pack 100 , including a case assembly 10 , a cell assembly 20 , a first circuit board 30 and a first connector 40 .
  • the cell assembly 20 is disposed in the casing assembly 10 .
  • the first circuit board 30 is disposed in the casing assembly 10 and connected to the cell assembly 20 .
  • the first connecting member 40 is connected to the first circuit board 30 .
  • the battery pack 100 includes a first channel 20a, the first channel 20a is disposed on the side of the cell assembly 20 away from the first connecting member 40, and the first channel 20a extends to the first circuit board 30.
  • the battery pack 100 further includes a first insulating member 50, and the first insulating member 50 is disposed in the gap between the cell assembly 20 and the first circuit board 30 through the first channel 20a, and the first circuit board 30 and the first connecting member 40 to improve the efficiency of injection into the first insulating member 50 .
  • the cell assembly 20 , the first circuit board 30 and the first connecting member 40 are adhesively connected through the first insulating member 50 .
  • the first insulating member 50 can enhance the protection of the battery pack 100 .
  • the first insulating member 50 has better thermal conductivity, and can dissipate heat from the cell assembly 20 and the first circuit board 30 , which is beneficial to improve the heat dissipation of the battery pack 100 .
  • a flowing insulating material is injected into the battery pack 100 through the first channel 20 a and cured to form the first insulating member 50 .
  • the first insulating member 50 includes one of potting glue, foam glue and adhesive.
  • the first insulating member 50 includes resin, which is formed by setting the flowable resin in the battery pack 100 by pouring after heating and melting the resin.
  • the first insulating member 50 includes a potting glue, and the flowable potting glue is set on the battery pack 100 by pouring and then cured to form.
  • the housing assembly 10 includes a first housing 11 and a second housing 12 , and the first housing 11 is connected to the second housing 12 .
  • the first housing 11 includes a first wall 111 , a second wall 112 , a third wall 113 , a fourth wall 114 and a fifth wall 115 .
  • the first wall 111 is opposite to the second wall 112
  • the third wall 113 is opposite to the fourth wall 114
  • the fifth wall 115 is opposite to the second housing 12 .
  • the first wall 111 connects the third wall 113 and the fourth wall 114
  • the second wall 112 connects the third wall 113 and the fourth wall 114
  • the fifth wall 115 connects the first wall 111, the second wall 112, the third wall 113 and the third wall 113.
  • the fourth wall 114 forms a first space for accommodating at least one of the cell assembly 20 , the first circuit board 30 and the first connector 40 .
  • the cell assembly 20 , the first circuit board 30 and the first connector 40 are all accommodated in the first space.
  • the cell assembly 20 and the first circuit board 30 are accommodated in the first space, and part of the first connector 40 is accommodated in the first space.
  • the cell assembly 20 is accommodated in the first space, and the first circuit board 30 and the first connector 40 are disposed outside the first space.
  • the structure of the battery pack 100 will be described in conjunction with the X, Y, and Z coordinate axes.
  • the X, Y, and Z coordinate axes are perpendicular to each other, and the X direction is defined as the first direction.
  • the Y direction is the second direction
  • the Z direction is the third direction
  • the first direction X is the direction in which the first wall 111 and the second wall 112 are oppositely arranged
  • the second direction Y is the third wall 113 and the fourth wall 114 Relative to the installation direction
  • the third direction Z is the relative installation direction of the fifth wall 115 and the second housing 12
  • the first direction X is perpendicular to the second direction Y and the third direction Z at the same time.
  • the length D1 of the first channel 20a is 6mm-30mm, which is beneficial for the pouring equipment to inject the flowing resin into the first channel 20a, reducing the bonding of the flowing resin and other structural components, For example, bonding with the cell assembly 20 .
  • the length of the first channel 20a is 10mm-20mm, which further improves the perfusion efficiency.
  • the length D2 of the first channel 20a is 6mm-80mm, which is beneficial for the pouring equipment to inject the flowing resin into the first channel 20a, reducing the bonding of the flowing resin and other structural components, For example, bonding with the cell assembly 20 .
  • the length of the first channel 20a is 10mm-60mm, which further improves the perfusion efficiency.
  • the battery cell assembly 20 , the first circuit board 30 and the first connecting member 40 are disposed in the first housing 11 , and the battery cell assembly 20 and the first connecting member 40 are connected to the first housing 11 .
  • the cell assembly 20 , the first circuit board 30 and the first connecting member 40 are sequentially arranged along the third direction Z.
  • flowing resin or potting glue is injected into the battery pack 100 along the third direction Z from the bottom of the cell assembly 20 .
  • the cell assembly 20 when the cell assembly 20, the first circuit board 30 and the first connector 40 are installed in the first housing 11, the first wall 111, the second wall 112, the third wall 113 and the After the fourth wall 114 is installed, the insulating material poured into it is placed upside down, and the fifth wall 115 is installed after the glue filling is completed. Further, the fifth wall 115 is installed after the first insulating member 50 is cured.
  • the battery pack 100 further includes a second circuit board 13 .
  • the second circuit board 13 is disposed in the second housing 12 and is insulated from the second housing 12 .
  • the second circuit board 13 can be a circuit board with a battery management system, which is used to intelligently manage and maintain each battery unit, reduce overcharging and overdischarging of the battery, prolong the service life of the battery, and monitor the state of the battery.
  • the battery pack 100 further includes a connection bracket 14 , and the first casing 11 and the second casing 12 are connected to the connection bracket 14 .
  • the connecting bracket 14 is disposed between the second circuit board 13 and the first connecting member 40 to reduce the risk of short circuit between the second circuit board 13 and the first connecting member 40 .
  • the connecting bracket 14 is made of insulating material.
  • the first housing 11 and the second housing 12 include heat-conducting materials, which can improve heat dissipation performance.
  • the first housing 11 and the second housing 12 include a metal heat conducting material and a heat conducting insulating material, and the insulating material may cover the outer surface of the metal heat conducting material.
  • the metal heat conducting material of the first housing 11 and the second housing 12 includes aluminum.
  • the outer wall of the second housing 12 is provided with fins 121 , and the fins 121 are arranged along the second direction Y and connected to the second housing 12 to further improve the heat dissipation performance.
  • the battery cell assembly 20 includes a plurality of battery cells 21 , and the multiple battery cells 21 are stacked along the first direction X.
  • Each cell 21 includes a cell casing 211 , an electrode assembly 213 disposed in the cell casing 211 , and an electrode terminal 212 connected to the electrode assembly 213 and drawn out from the cell casing 211 .
  • the battery case 211 includes a first part 211a and a second part 211b, the first part 211a accommodates the electrode assembly 213, the second part 211b connects the first part 211a, and the electrode terminal 212 protrudes from the second part 211b.
  • the first insulating member 50 is disposed between the first connecting member 40 and the cell housing 211 , and the first insulating member 50 covers the first circuit board 30 and part of the cell assembly 20 .
  • the electrode terminal 212 is bonded to the first insulating member 50 , and along the second direction Y, the projection of the electrode terminal 212 overlaps with the projection of the first insulating member 50 .
  • the projected portion of the electrode terminal 212 is located within the projection of the first insulating member 50 , and the first insulating member 50 covers the electrode terminal 212 to fix and insulate the electrode terminal 212 and dissipate heat from the electrode terminal 212 .
  • the projection of the electrode terminal 212 protruding from the second portion 211 b is located within the projection of the first insulating member 50 .
  • the first insulator 50 is bonded to the part of the electrode terminal 212 protruding from the second part 211b, and insulates the part of the electrode terminal 212 protruding from the second part 211b, so as to strengthen the fixing of the electrode terminal 212 and lift the electrode terminal. 212 heat dissipation.
  • the first insulator 50 is bonded to the entire structure where the electrode terminal 212 protrudes from the second portion 211b, or the first insulator 50 is bonded to a part of the structure where the electrode terminal 212 protrudes from the second portion 211b.
  • the projection of the second part 211b overlaps with the projection of the first insulating member 50, and the first insulating member 50 bonds at least part of the second part 211b to further insulate the electrode terminal 212 and further strengthen the electrode terminal 212.
  • the fixation further improves the heat dissipation of the electrode terminal 212.
  • the cell casing 211 includes a first shell 2111 and a second shell 2112 , and the first shell 2111 is connected to the second shell 2112 .
  • the first shell 2111 and the second shell 2112 can be folded along the connection position, so that the first shell 2111 and the second shell 2112 overlap to form a first part 211 a to cover the electrode assembly 213 .
  • a peripheral side of the first casing 2111 extends outward to form a plurality of first extensions 2113
  • a peripheral side of the second casing 2112 extends outward to form a plurality of second extensions 2114 .
  • the second part 211b includes a first sealing part 2115 and a second sealing part 2116, the first sealing part 2115 is disposed opposite to the connection position, and the electrode terminal 212 protrudes from the first sealing part 2115 to the first part 211a.
  • the second part 211b includes two second sealing parts 2116, and the two second sealing parts 2116 are arranged opposite to each other along the second direction Y.
  • the second part 211b includes a first sealing portion 2115
  • the battery cell 21 includes two electrode terminals 212
  • the two electrode terminals 212 extend out of the battery cell case 211 from the first sealing portion 2115 .
  • the first housing 2111 and the second housing 2112 are separated
  • the second part 211b includes two first sealing parts 2115
  • the two first sealing parts 2115 are arranged opposite to each other along the third direction Z
  • the electric core 21 includes Two electrode terminals 212, wherein one electrode terminal 212 extends out of the cell casing 211 from one of the first sealing parts 2115, and the other electrode terminal 212 extends out of the cell casing 211 from the other first sealing part 2115, and the two The electrode terminals 212 are oppositely arranged along the third direction Z. As shown in FIG.
  • the electrode assembly 213 includes a wound structure formed by winding a positive electrode sheet, a negative electrode sheet, and a separator.
  • the electrode assembly 213 can also be a laminated structure, that is, the positive electrode sheet, the separator and the negative electrode sheet are stacked in sequence to form an electrode assembly 213 unit, and multiple electrode assembly 213 units are laminated to form an electrode assembly 213 .
  • the battery case 211 includes an aluminum-plastic film.
  • the cell 21 includes a pouch cell.
  • the electric core 21 is in contact with the first housing 11 , and the heat of the electric core 21 is dissipated to the external environment through the first housing 11 .
  • the electrode terminal 212 has a welding portion 212 a extending out of the cell casing 211 , and the welding portion 212 a is formed by bending the electrode terminal 212 .
  • the electrode terminals 212 of adjacent battery cells 21 are bent towards each other and connected to the first circuit board 30 .
  • the electrode terminal 212 includes a first terminal 212b and a second terminal 212c, the first terminal 212b and the second terminal 212c have opposite polarities, one of the first terminal 212b and the second terminal 212c is a positive terminal, and the other One is the negative terminal.
  • the projection of the welding portion 212a of the first terminal 212b of the cell 21 at least partially overlaps the projection of the welding portion 212a of the second terminal 212c of the adjacent cell 21 .
  • the first terminal 212b and the second terminal 212c of adjacent cells are bent towards each other, and the welding portion 212a of the first terminal 212b and the welding portion 212a of the second terminal 212c are stacked and connected to each other to realize the series connection between the cells 21 .
  • the projection of the first terminal 212b of the cell 21 may at least partially overlap with the projection of the first terminal 212b of the adjacent cell 21, and be connected through the first circuit board 30, The parallel connection between the battery cells 21 is realized.
  • the battery cell assembly 20 includes a plurality of battery cells 21 stacked along the first direction X, wherein some of the battery cells 21 are stacked in the first row 21a along the first direction X, and some of the battery cells
  • the cores 21 are stacked in a second row 21b along the first direction X, and the first row 21a and the second row 21b are arranged at intervals along the second direction Y.
  • the first channel 20a is set in the second space 20b.
  • the second space 20b is used as the first channel 20a.
  • the upgraded first column 21a and the second column 21b when upgrading the specifications of the batteries in the first column 21a and the second column 21b, by reducing the length of the second space 20b along the second direction Y, the upgraded first column 21a and the second column 21b will The core occupies part of the second space 20b, which is convenient for increasing the capacity of the battery core 21 .
  • the first column 21a includes battery cells 21a-1
  • the second column 21b includes battery cells 21b-1
  • the battery cells 21a-1 and the battery cells 21b-1 are arranged at intervals along the second direction Y
  • the battery cells 21a The gap between -1 and the battery cell 21b-1 serves as the first sub-channel 20a-1.
  • the first column 21a includes battery cells 21a-2
  • the second column 21b includes battery cells 21b-2
  • the battery cells 21a-1 and the battery cells 21a-2 are arranged in sequence along the first direction X
  • the battery cells 21b-1 The cells 21b-2 and 21b-2 are arranged in sequence along the first direction X
  • the cells 21a-2 and 21b-2 are arranged at intervals along the second direction Y, with the gap between the cells 21a-2 and 21b-2 As the second branch channel 20a-2.
  • the first sub-channel 20a-1 and the second sub-channel 20a-2 can be independently used as the first channel 20a for glue filling.
  • the first sub-channel 20a-1 communicates with the second sub-channel 20a-2, and serves as the first channel 20a for glue filling.
  • the first row 21a may also at least include battery cells 21a-3, 21a-4, 21a-5, 21a-6 and 21a-7 arranged in sequence along the first direction X.
  • the first column 21a two battery cells arranged adjacently in sequence along the first direction X are used as the first battery cell group, for example, the battery cell 21a-1 and the battery cell 21a-2 are used as the first battery cell group 201, and the battery cells 21a-3 and the battery cell 21a-4 are used as the first battery cell group 202, and the battery cell 21a-5 and the battery cell 21a-6 are used as the first battery cell group 203.
  • the second column 21b may further include at least battery cells 21b-3, 21b-4, 21b-5, 21b-6 and 21b-7 arranged in sequence along the first direction X.
  • Two battery cells arranged adjacent to each other along the first direction X in the second column 21b are used as the second battery cell group, for example, the battery cell 21b-1 and the battery cell 21b-2 are used as the second battery cell group 204, and the battery cell 21b -3 and the battery cell 21b-4 are used as the second battery cell group 205, and the battery cell 21b-5 and the battery cell 21b-6 are used as the second battery cell group 206.
  • the first cell group 201 and the second cell group 204 are arranged at intervals along the second direction Y, and the gap between the first cell group 201 and the second cell group 204 is used as the first channel 20a.
  • the first cell group 202 and the second cell group 205 are arranged at intervals along the second direction Y, and the gap between the first cell group 202 and the second cell group 205 is used as another first channel 20a.
  • the first cell group 203 and the second cell group 206 are arranged at intervals along the second direction Y, and the gap between the first cell group 203 and the second cell group 206 serves as another first channel 20a.
  • a plurality of first channels 20a are arranged in a row along the first direction X.
  • the first cell group can also be composed of more than two cells 21, and the second cell group can also be composed of more than two cells 21, for example, the first cell group consists of three
  • the second battery pack consists of three battery cells 21.
  • the first cell group consists of one cell 21, and the second cell group consists of one cell 21—for example, in FIG. 12, the first cell group may consist of cells 21a-7, and the second cell group
  • the cell pack can be composed of cells 21b-7.
  • part of the first cell group consists of one cell 21, part of the first cell group consists of more than one cell 21, part of the second cell group consists of one cell 21, and part of the second cell group consists of one cell 21. Consists of more than one electric core 21.
  • the cell assembly 20 further includes a plurality of second connectors 22, and the second connectors 22 are arranged between adjacent first cell groups and between adjacent first cell groups. Between the two battery packs.
  • the second connecting member 22 is in contact with the battery cell 21 to dissipate heat from the battery cell 21 .
  • the second connecting member 22 is in contact with the first casing 11 , transfers heat from the battery cell 21 to the first casing 11 , and dissipates heat from the battery cell 21 through the first casing 11 .
  • the second connecting member 22 includes a first component 221 .
  • the first component 221 includes a first section 221a, a second section 221b and a third section 221c arranged along the second direction Y.
  • the first section 221a is connected to the outer surface of the first cell group arranged along the first direction X, viewed along the third direction Z, the first section 221a is arranged between adjacent first cell groups.
  • the projection of the first section 221a is located within the projection of the cell housing 211 of the first cell pack.
  • the second section 221b is disposed in the second space 20b and connects the first section 221a and the third section 221c.
  • the second section 221b can divide the second space 20b into a plurality of first sections.
  • One channel 20a the glue potting equipment can inject flowing insulating material through a plurality of first channels 20a to improve efficiency.
  • the third section 221c is connected to the outer surface of the second battery pack arranged along the first direction X. Viewed along the third direction Z, the third section 221c is disposed between adjacent second cell groups. Along the first direction X, the projection of the third section 221c is located within the projection of the cell casing 211 of the second cell pack.
  • the first section 221a is used to dissipate heat from the first cell group
  • the third section 221c is used to dissipate heat to the second cell group
  • the connection between the first section 221a and the third section 221c through the second section 221b can increase the The heat dissipation area and the strength of the second connecting member 22 .
  • the first cell group 201 includes a first outer surface 201a and a second outer surface 201b arranged along the first direction X
  • the second cell group 204 includes a third outer surface 204a and a fourth outer surface arranged along the first direction X 204b.
  • the second outer surface 201b is connected with the first section 221a, which can dissipate heat from the battery cell 21a-2 and the battery cell 21a-3.
  • the fourth outer surface 204b is connected with a third section 221c, which can dissipate heat from the battery cell 21b-2 and the battery cell 21b-3.
  • the second section 221b is disposed in the second space 20b, which can increase the heat dissipation area and further improve the heat dissipation.
  • the two adjacent second sections 221b and the opposite sides of the first cell group 201 and the second cell group 204 form a first channel 20a, which facilitates the flow of resin or potting glue from the bottom of the cell 21 along the first channel 20a.
  • Three directions Z are injected into the battery pack 100 to form the first insulating member 50 .
  • the cell assembly 20 further includes a first structural member 23 connected to the first component 221 .
  • the projection of the first structural member 23 is located within the projection of the first component 221 .
  • the first structural member 23 includes a first segment 231 and a second segment 232, the first segment 231 is arranged to connect to the first part 221, and the first segment 231 is located between adjacent first cell groups , the second segment 232 is connected to the first component 221 , and the second segment 232 is located between adjacent second cell groups.
  • the first structural member 23 includes an elastic member. When the electric core 21 expands, the first structural member 23 can be compressed to provide an expansion space for the electric core 21.
  • the first structural member 23 includes foam.
  • the first structural member 23 is bonded to the second connecting member 22 .
  • the first structural member 23 further includes a third segment 233 connecting the first segment 231 and the second segment 232, the third segment 233 is located in the second space 20b, and the third segment 233 is connected to in the second section 221b.
  • the first structural member 23 includes foam with a micro-closed cell structure, and the insulating material that restricts injection flow is bonded to the first structural member 23 .
  • two second connectors 22 are arranged between adjacent first cell groups, one second connector 22 is connected to the first cell group, and the other second connector 22 is connected to
  • the first structural member 23 is located between the two second connecting members 22 , which is beneficial to improve the heat dissipation of the battery cells 21 .
  • the first section 231 is located between the two first sections 221a
  • the second section 232 is located between the two third sections 221c
  • the third section 233 is located between the two second sections 221b.
  • One of the first sections 221a is connected to the first battery pack, the other first section 221a is connected to another first battery pack, one of the third sections 221c is connected to the second battery pack, and the other first section 221a is connected to the other first battery pack.
  • a third section 221c is connected to another second battery pack.
  • the first component 221 includes a first section 221a and a third section 221c arranged along the second direction Y, and the first section 221a and the third section 221c are arranged at intervals.
  • the first section 221a is connected to the outer surface of the first battery pack along the first direction X, and along the first direction X, the projection of the first section 221a is located within the projection of the battery case 211 of the first battery pack.
  • the third section 221c is connected to the outer surface of the second battery pack arranged along the first direction X. Along the first direction X, the projection of the third section 221c is located within the projection of the cell casing 211 of the second cell pack.
  • the projection of the first part 221 is separated from the projection of the second space 20b, the first section 221a and the third section 221c are not arranged in the second space 20b, and the whole second space 20b can be regarded as Glue filling is performed in the first channel 20a to improve the glue filling efficiency.
  • the first component 221 is disposed between adjacent battery cells. Further, the first section 221a is arranged between the adjacent batteries in the first row 21a, and the third section 221c is arranged between the adjacent batteries in the second row 21b.
  • a first section 221a is connected to the first outer surface 201a
  • a first section 221a is connected to the second outer surface 201b
  • the other first section 221a is located between the batteries 21a- 1 and the battery cell 21a-2, and connect the surfaces of the battery cell 21a-1 and the battery cell 21a-2, which can increase the contact area of the first part 221 to the battery cell and improve the heat dissipation effect.
  • the battery cell assembly 20 further includes a second structural member 24 disposed between adjacent battery cells 21 .
  • the second structural member 24 is disposed between adjacent cells of the first cell group.
  • the second structural member 24 is disposed between adjacent cells of the second cell group.
  • the projection of the second structural member 24 is located within the projection of the battery case 211 .
  • the second structural member 24 includes an elastic member. When the electric core 21 expands, the second structural member 24 can be compressed to provide an expansion space for the electric core 21.
  • the second structural member 24 includes foam.
  • the battery cell assembly 20 further includes a third structural member 25 , and the third structural member 25 is disposed between the battery cell 21 and the first component 221 .
  • the third structural member 25 includes an adhesive member, which can bond the first component 221 to the battery case 211 .
  • the third structural member 25 includes an elastic member. When the electric core 21 expands, the third structural member 25 can be compressed to provide an expansion space for the electric core 21.
  • the third structural member 25 includes foam.
  • an adhesive is provided on the surface of the foam connecting the first part 221 and the battery case 211 .
  • the battery pack 100 further includes a fourth structural member 26 .
  • the fourth structural member 26 is located between the two outermost surfaces of the cell assembly 20 and the first wall 111 , and the cell assembly 20 can be bonded to the first wall 111 and the second wall 112 .
  • the fourth structural member 26 includes insulating material.
  • the thermal conductivity of the fourth structural member 26 is smaller than the thermal conductivity of the second connecting member 22, and the fourth structural member 26 can limit the heat transfer of the battery cell assembly 20 to the first wall 111 and the second wall 111 through the fourth structural member 26.
  • the wall 112 reduces the temperature difference between the cells 21 .
  • the battery pack 100 further includes a heat conduction member 27 , the fourth structural member 26 is located between the heat conduction member 27 and the first wall 111 , and the heat conduction member 27 is connected to the battery cell 21 , which is beneficial to improve the heat dissipation of the battery cell 21 .
  • the heat conducting element 27 and the second connecting element 22 have the same structure.
  • the thermal conductivity of the heat conducting member 27 is smaller than that of the second connecting member 22 , reducing the temperature difference between the battery cells 21 .
  • the second connecting member 22 further includes a second part 222 connected to a side of the first part 221 .
  • the second part 222 protrudes from between adjacent battery cells 21 and is bent towards the battery cells 21 , so that the second part 222 is connected to the battery case 211 .
  • the second component 222 is in contact with the battery case 211 .
  • the second component 222 is connected to the battery case 211 through other structural members, such as thermal pads or thermal adhesives.
  • the projection of the second component 222 and the projection of the electric core 21 at least partially overlap.
  • the contact area between the second connecting piece 22 and the battery case 211 is increased, and the heat is conducted to the second part 222 through the battery case 211, and then the second part 222 is conducted to the first casing 11 to improve the heat dissipation effect on the battery cell 21 .
  • the first part 221 includes a first side 2211 and a second side 2212 , and the second part 222 connects the first side 2211 and the second side 2212 .
  • the projection of the second component 222 is located within the projection of the battery case 211 .
  • the first part 221 also includes a third side 2213, the third side 2213 connects the first side 2211 and the second side 2212, the third side 2213 is provided with two second parts 222, and the two second parts 222 The partition connects the third side 2213 .
  • the projection of the second part 222 is located in the projection of the battery case 211, and the projection of the second part 222 is separated from the projection of the second space 20b, and the second part 222 is separated and arranged on the third side
  • the edge 2213 can reduce the shielding of the first channel 20a and facilitate glue filling.
  • the first part 221 and the second part 222 are integrally bent to increase the structural strength of the second connecting part 22 .
  • the second connecting member 22 is an aluminum shell.
  • the battery pack 100 further includes a third connecting member 60, the third connecting member 60 is arranged in the second space 20b, and is connected to the second connecting member twenty two.
  • the third connecting member 60 is spaced apart from the second sealing portion 2116 .
  • the third connecting member 60 is in contact with the second sealing portion 2116 .
  • the third connecting member 60 is continuously extended along the third direction Z. Along the second direction Y, the projection of the third connecting member 60 is located within the projection of the first part 211a and the second part 211b.
  • the third connecting member 60 is arranged in the gap along the second direction Y between the first cell group and the second cell group, the third connecting member 60 connects the second section 221b and is close to the first cell group
  • the group arrangement can improve the structural strength of the cell assembly 20 .
  • the gap between the third connecting member 60 and the second cell pack is used as the first channel 20a for glue filling.
  • the third connecting member 60 is disposed in the gap along the second direction Y between the first cell group and the second cell group, the third connecting member 60 connects the second section 221b and is close to the second cell
  • the group arrangement can improve the structural strength of the cell assembly 20 .
  • the gap between the third connecting member 60 and the first cell pack is used as the first channel 20a for glue filling.
  • the gap between the first cell group and the second cell group along the second direction Y is provided with a third connecting piece 60 arranged separately, and a third connecting piece 60 is connected to the second section 221b and is close to the second section 221b.
  • One cell group is provided, and another third connecting member 60 is connected to the second section 221 b and is disposed close to the second cell group, which can further improve the structural strength of the cell assembly 20 .
  • the gap between the two third connecting pieces 60 is used as the first channel 20a for glue filling.
  • the specifications of the cells in the first row 21a and the second row 21b can be upgraded, so as to increase the capacity of the cells 21 .
  • the third connecting member 60 includes an elastic member, and the electrical third connecting member 60 can be compressed to provide cushioning for the cell assembly 20 .
  • the third connecting member 60 includes foam.
  • the first circuit board 30 is provided with multiple groups of holes 31 , and each group of holes 31 includes a first hole 311 and a second hole 312 arranged along the first direction X.
  • the first hole 311 and the second hole 312 extend along the second direction Y.
  • the first terminal 212b of the adjacent cell 21 passes through the first hole 311
  • the second terminal 212c of the other cell 21 passes through the second hole 312
  • the welding portion 212a of the first terminal 212b and the welding portion of the second terminal 212c 212a are stacked on each other and connected to the first circuit board 30 .
  • the battery pack 100 includes a plurality of first conductive sheets 32, the first conductive sheets 32 are connected to the first circuit board 30, the first terminal 212b of the adjacent cell 21 passes through the first hole 311, and the other cell 21
  • the second terminal 212c of the second terminal 212c passes through the second hole 312, and the welding portion 212a of the first terminal 212b and the welding portion 212a of the second terminal 212c are stacked on each other and then welded to the first conductive sheet 32.
  • Welding includes laser welding, ultrasonic welding, and the like.
  • the soldering portion 212a and the first conductive sheet 32 may also be connected through other methods such as conductive glue.
  • each group of holes 31 further includes a third hole 313 , viewed along the third direction Z, the third hole 313 is located between the first hole 311 and the second hole 312 .
  • the projection of the third hole 313 overlaps with the projection of the first conductive sheet 32 .
  • the projection of the third hole 313 is located within the projection of the first conductive sheet 32 .
  • the first circuit board 30 is further provided with a second conductive sheet 33 .
  • the second conductive sheet 33 connects the electrode terminals 212 of the two battery cells 21 arranged along the second direction Y, and is used to transmit the current from the first column 21a to the second column 21b, realizing the first column 21a and the second column 21b connection in series or in parallel.
  • the thickness of the second conductive sheet 33 is greater than the thickness of the first conductive sheet 32 .
  • the first circuit board 30 is further provided with a plurality of first communication holes 34 , and along the third direction Z, the first communication holes 34 penetrate the first circuit board 30 . Some of the first communication holes 34 are arranged in a row along the second direction Y, and some of the first communication holes 34 are arranged in a row along the first direction X.
  • the first communication hole 34 allows the first insulating member 50 to flow into the first connecting member 40 , so as to improve the efficiency of injecting the first insulating member 50 into the battery pack 100 .
  • the first circuit board 30 is further provided with a plurality of second communication holes 35, the plurality of second communication holes 35 are arranged in a row along the first direction X, and along the second direction Y, the plurality of second communication holes 35 It is located in the middle of the first circuit board 30 .
  • the battery pack 100 also includes a sampling wire harness 101 connected to the first circuit board 30 through a plurality of second communication holes 35 .
  • the first circuit board 30 is also provided with a plurality of first through holes 36.
  • the first through holes 36 are arranged in the second through holes along the second direction Y. 35 , the first through hole 36 allows the first insulator 50 to flow into the battery pack 100 , improving the efficiency of injecting the first insulator 50 into the battery pack 100 .
  • the diameter of the first through hole 36 is larger than that of the first communication hole 34 , so as to further improve the efficiency of injecting the first insulating member 50 into the battery pack 100 .
  • the first circuit board 30 is provided with two rows of first through-holes 36 , and the two rows of first through-holes 36 are arranged on both sides of the second through-hole 35 along the second direction Y.
  • the first through hole 36 is located in the second space 20b.
  • at least part of the projection of the first through hole 36 is located within the projection of the first channel 20a, and the first insulating member 50 injected from the first channel 20a can flow from the first through hole 36 to Between the first circuit board 30 and the first connecting member 40 , the efficiency of injecting the first insulating member 50 into the battery pack 100 is further improved.
  • the battery pack 100 further includes a first electrical connection part 70 and a second electrical connection part 80 .
  • the first electrical connection part 70 and the second electrical connection part 80 are soldered to the first circuit board 30 .
  • the first electrical connection part 70 is connected to one of the first terminal 212b and the second terminal 212c, and the second electrical connection part 80 is connected to the other.
  • the first electrical connection part 70 and the second electrical connection part 80 are connected to the second circuit board 13 , and the energy of the battery cell 21 is transmitted to an external device through the first electrical connection part 70 and the second electrical connection part 80 .
  • the first electrical connection part 70 and the second electrical connection part 80 include copper bars.
  • the first electrical connection portion 70 includes a first conductive portion 71 and a first insulating portion 72 .
  • the first insulating part 72 covers the part of the first conductive part 71, and both ends of the first conductive part 71 protrude from the first insulating part 72, wherein one end of the first conductive part 71 is connected to the first circuit board 30 and the first electrical terminal 212b and one of the second terminal 212c, the other end is connected to the second circuit board 13 .
  • the first conductive portion 71 includes a fourth section 71a and a fifth section 71b, the fourth section 71a is arranged along the third direction Z, and the fifth section 71b is bent in a direction opposite to the first direction X set up.
  • the fifth section 71b may be a soft structure.
  • the fifth section 71b includes a plurality of laminated flexible copper bar monoliths.
  • the structure of the second electrical connection part 80 is the same as that of the first electrical connection part 70, the difference is that the end of the first conductive part 71 connected to the first circuit board 30 extends in the direction opposite to the second direction Y One end of the second electrical connection portion 80 connected to the first circuit board 30 extends along the second direction.
  • the first electrical connection part 70 is first assembled with the second circuit board 13, specifically, the fifth section 71b is first bent to approximately the third direction Z, then connect the fifth section 71b to the second circuit board 13, connect the second housing 12 to the first housing 11, and drive the second housing 12 during the process of covering the first housing 11
  • the five sections 71b are bent from the third direction Z to a direction substantially opposite to the first direction X, and then the assembly of the first casing 11 and the second casing 12 is completed.
  • the state of the first electrical connection part 70 after the assembly of the first housing 11 and the second housing 12 is the initial state of the first electrical connection part 70, which can reduce the length of the first electrical connection part 70 , thereby reducing the length of the energy circuit, and reducing the weight of the first electrical connection part 70 .
  • the first connecting member 40 is insulating.
  • the first connecting member 40 is made of insulating material.
  • the first connecting member 40 is made of metal material and insulating material, and the insulating material may cover the outer surface of the metal material.
  • the first connecting member 40 includes a first main body 40 a, and the first main body 40 a is connected to the first circuit board 30 to insulate the first circuit board 30 .
  • the first connecting member 40 is provided with a first protruding portion 41 , and the first protruding portion 41 is disposed on an edge of the first main body 40a.
  • the first protrusion 41 includes a first connecting wall 411 , a second connecting wall 412 , a third connecting wall 413 and a fourth connecting wall 414 , and the first connecting wall 411 and the second connecting wall 412 are connected to the first body along the first direction X.
  • the third connecting wall 413 and the fourth connecting wall 414 connect the edge of the first body 40a along the second direction Y, the first connecting wall 411, the second connecting wall 412, the third connecting wall 413, the fourth connecting wall 414 cooperates with the first body 40a to form a third space 40b, and the first circuit board 30 is disposed in the third space 40b.
  • the projection of the first convex portion 41 overlaps with the projection of the first circuit board 30, and the position of the first circuit board 30 is restricted by the first convex portion 41 to facilitate assembly .
  • the projection of the first circuit board 30 is located within the projection of the first protrusion 41 .
  • the projection of the first protrusion 41 overlaps with the projection of the electrode terminal 212 to insulate the electrode terminal 212 .
  • the projection of the welding part 212a is located within the projection of the first convex part 41, further strengthening the insulation.
  • the projection of the first insulating member 50 is located within the projection of the first protrusion 41 .
  • the outer surfaces of the first connecting wall 411, the second connecting wall 412, the third connecting wall 413 and the fourth connecting wall 414 are provided with an adhesive, which can bond the first connecting member 40 to the first housing 11. Fix the first connecting piece 40 .
  • first connecting wall 411 is bonded to the first wall 111
  • second connecting wall 412 is bonded to the second wall 112
  • third connecting wall 413 is bonded to the third wall 113
  • fourth connecting wall 414 is bonded to Fourth wall 114 .
  • the adhesive includes thermal conductive glue.
  • the first connecting member 40 is provided with a first opening 42 , and along the third direction Z, the first opening 42 penetrates the surface of the first main body 40 a.
  • the first electrical connection portion 70 passes through the first opening 42 and extends to a side of the first connecting member 40 away from the first circuit board 30 .
  • the first connector 40 is provided with a second protrusion 43
  • the second protrusion 43 is disposed on the edge of the first opening 42
  • the second protrusion 43 limits the position of the first electrical connection part 70
  • the second protrusion 43 43 is provided with a second protrusion opening 430
  • the second protrusion opening 430 communicates with the first opening 42
  • the first electrical connection part 70 extends to the first connector 40 after passing through the first opening 42 and the second protrusion opening 430 The side away from the first circuit board 30 .
  • the projection of the portion of the first conductive portion 71 connected to the first circuit board 30 is located within the projection of the second convex portion 43 .
  • the first conductive part 71 is insulated by the second protruding part 43 to reduce the risk of a short circuit in the part where the first conductive part 71 is connected to the first circuit board 30 .
  • the first insulating part 72 is located in the space formed by the second convex part 43, increasing the length of the second convex part 43 along the third direction Z, and further improving the connection between the first conductive part 71 and the first circuit board 30. insulation.
  • the first body 40 a is provided with a second opening 44 , and the second electrical connection part 80 passes through the second opening 44 .
  • the first connecting member 40 is provided with a third protrusion 45 , and the third protrusion 45 is disposed on an edge of the second opening 44 .
  • the third convex portion 45 limits the position of the second electrical connection portion 80, the third convex portion 45 is provided with a third convex portion opening 450, the third convex portion opening 450 communicates with the second opening 44, and the second electrical connection portion 80 passes through
  • the second opening 44 and the third protrusion opening 450 extend to the side of the first connecting member 40 away from the first circuit board 30 .
  • the projection of the portion of the second electrical connection portion 80 connected to the first circuit board 30 is located within the projection of the third convex portion 45 .
  • the third protrusion 45 insulates the second electrical connection portion 80 , reducing the risk of a short circuit occurring at the portion of the second electrical connection portion 80 connected to the first circuit board 30 .
  • the first body 40 a is provided with a third opening 46 , the third opening 46 penetrates the surface of the first body 40 a, and the sampling wire harness 101 passes through the third opening 46 .
  • the first connector 40 is provided with a fourth convex portion 47, the fourth convex portion 47 is arranged on the edge of the third opening 46, the fourth convex portion 47 limits the position of the sampling wire harness 101, and the fourth convex portion 47 is provided with a fourth convex portion
  • the opening 470 , the fourth protrusion opening 470 communicate with the third opening 46 , and the sampling wire harness 101 passes through the third opening 46 and the fourth protrusion opening 470 and then extends to the side of the first connector 40 away from the first circuit board 30 .
  • the projection of the portion of the sampling wire bundle 101 connected to the first circuit board 30 is located within the projection of the fourth convex portion 47 .
  • the sampling wire harness 101 is insulated by the fourth convex portion 47 to reduce the risk of a short circuit at the part of the sampling wire harness 101 connected to the first circuit board 30 .
  • the battery pack 100 further includes a second insulating member 90 connected to the first connecting member 40 .
  • the second electrical connection part 80 passes through the second opening 44 and the third protrusion opening 450
  • the sampling wire harness 101 passes through the third Behind the opening 46 and the fourth protrusion opening 470
  • the second insulator 90 is provided from the second protrusion opening 430 to the first opening 42, from the third protrusion opening 450 to the second opening 44, and from the fourth protrusion opening.
  • the first electrical connection part 70 can be fixed in the first opening 42 and the second protrusion opening 430
  • the second electrical connection part 80 can be fixed in the second opening 44 and the third protrusion opening 450 and fixing the sampling wire harness 101 in the third opening 46 and the fourth convex opening 470
  • the first opening 42, the second opening 44 and the third opening 46 can also be closed
  • the first casing 11 can be turned upside down for glue filling , the flow of the first insulating member 50 from the opening of the first connecting member 40 is reduced.
  • the second insulating member 90 is disposed in the gap between the first opening 42 and the first electrical connection portion 70 .
  • the second insulating member 90 includes resin, and after the resin is heated and melted, the flowable second insulating member 90 is placed in the opening of the first connecting member 40 by pouring and then fixed.
  • the second insulating member 90 includes quick-drying glue.
  • the part of the second insulating member 90 injected into the first opening 42 , the second opening 44 and the third opening 46 flows between the first circuit board 30 and the first connecting member 40 , and the first circuit board 30 can be bonded. and the first connector 40.
  • the third opening 46 includes a first region 461 and a second region 462 , and along the second direction Y, the width of the first region 461 is greater than the width of the second region 462 .
  • the second area 462 is used for passing the components on the sampling wire harness 101
  • the first area 461 is used for passing the lines of the sampling wire harness 101 .
  • the first body 40 a includes a first surface 401 and a second surface 402 disposed along the third direction Z, the first surface 401 is away from the first circuit board 30 , and the second surface 402 is close to the first circuit board 30 .
  • the first surface 401 is provided with a first protrusion 401a, and the first protrusion 401a is formed by indenting from the second surface 402 toward the first surface 401 in a direction opposite to the third direction Z.
  • the first protrusion 401a is extended along the second direction Y, which can improve the structural strength of the first body 40a.
  • a plurality of first protrusions 401a are provided, and the plurality of first protrusions 401a are arranged along the first direction X to further improve the structural strength of the first body 40a.
  • the first protrusion 401 a is connected to the first circuit board 30 and located between adjacent first conductive sheets 32 .
  • the height of the first protrusion 401a along the third direction Z is greater than the sum of the thickness of the first conductive sheet 32 and the thickness of the welding portion 212a connected to the first conductive sheet 32, and the first main body 40a is supported by the first protrusion 401a, so that There is a first gap 403 between the first surface 401 and the welding portion 212a, and a first insulating member 50 is arranged in the first gap 403, and the first insulating member 50 flows into the first gap 403, and can be adhered by the first insulating member 50. Connecting the first connecting piece 40 and the welding part 212a can also insulate the welding part 212a.
  • the present application also provides a method for manufacturing the aforementioned battery pack 100 , which specifically includes the following steps:
  • Step 1 assemble the cell assembly 20, the first circuit board 30 and the first connector 40, the cell assembly includes a first row of cells stacked along the first direction and a second row of cells stacked along the first direction, the second The first row of cells and the second row of cells are arranged at intervals along the second direction, and a first channel is provided between the first row of cells and the second row of cells;
  • Step 2 place the cell assembly 20, the first circuit board 30 and the first connector 40 upside down, inject flowing insulating material from the side of the cell assembly facing away from the first circuit board through the first channel,
  • the first insulating member 50 is formed after the insulating material is cured;
  • Step 3 after the first insulating member 50 is cured, the cell assembly 20 , the first circuit board 30 and the first connecting member 40 are arranged in the housing assembly.
  • step 1 and step 2 after the first electrical connection part 70 is passed through, the second insulating member 90 is injected into the opening on the first connecting member 40, and the second insulating member 90 closes the first connecting member 40 and the gap between the first electrical connection part 70.
  • step 1 and step 2 after the first electrical connection part 70 passes through the first opening 42 and the second protrusion opening 430, the second electrical connection part 80 passes through the second opening 44 and the second protrusion opening 430.
  • the insulating material injected into the flow is provided at the first opening 42 from the second protrusion opening 430 and from the third protrusion opening 430.
  • the top opening 450 is provided at the second opening 44 and from the fourth convex opening 470 to the third opening 46, and waits for the insulating material to cure.
  • the upside-down placement in step 2 may be placing the cell assembly 20 and the first circuit board 30 in sequence along a direction parallel to the third direction Z.
  • placing the first connecting member 40 upside down in step 2 may be to set the opening of the third space 40 b of the first connecting member 40 in a direction opposite to the third direction Z.
  • step 3 specifically includes installing the cell assembly 20 , the first circuit board 30 and the first connector 40 in the first housing 11 , the first electrical connection part 70 , the second electrical connection part 80 And the portion where the sampling wire harness 101 passes through the first connecting member 40 does not exceed the height of the first casing 11 .
  • step 3 specifically includes installing the second circuit board 13 on the second housing 12, bending the first electrical connection part 70 and the second electrical connection part 80, and connecting the first electrical connection part 70 and the second The electrical connection part 80 is connected to the second circuit board 13 , and then the second casing 12 is connected to the first casing 11 to complete the assembly of the battery pack 100 .
  • the present application also provides an electric device 200 using the above-mentioned battery pack 100 .
  • the electrical equipment 200 of the present application may be, but not limited to, drones, backup power sources, electric vehicles, electric motorcycles, electric power-assisted bicycles, electric tools, large household storage batteries, and the like.

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Abstract

本申请公开一种电池组、制造方法和具有电池组的用电设备，电池组包括壳体组件、电芯组件、第一电路板、第一连接件和第一绝缘件。电芯组件设于壳体组件内，电芯组件包括沿第一方向堆叠的第一列电芯和沿第一方向堆叠的第二列电芯，第一列电芯和第二列电芯沿第二方向间隔设置，第一列电芯和第二列电芯之间具有设有第一通道，第二方向垂直于第一方向。第一电路板连接电芯组件，第一通道延伸至第一电路板。第一连接件设于壳体组件内。第一绝缘件用于将电芯组件、第一电路板和第一连接件粘接连接。通过在第一列电芯和第二列电芯之间设有第一通道，第一通道延伸至第一电路板，使第一绝缘件将电芯组件、第一电路板和第一连接件粘接连接，更好固定电芯。

Description

电池组、用电设备及制造方法 技术领域
本申请涉及储能技术领域，尤其涉及一种电池组、用电设备及制造方法。
背景技术
电池组一般包括多个电芯和电路板，电芯连接于电路板，电芯和电路板在使用或运输过程中可能会移动，影响电池组的使用。
发明内容
有鉴于此，有必要提供一种电池组及用电设备，可更好的固定电芯。
本申请的实施例提供了一种电池组，包括壳体组件、电芯组件、第一电路板、第一连接件和第一绝缘件。电芯组件设于壳体组件内。电芯组件包括沿第一方向堆叠的第一列电芯和沿第一方向堆叠的第二列电芯。第一列电芯和第二列电芯沿第二方向间隔设置。第一列电芯和第二列电芯之间具有设有第一通道。第二方向垂直于第一方向。第一电路板连接电芯组件，第一通道延伸至第一电路板。第一连接件设于壳体组件内。第一绝缘件用于将电芯组件、第一电路板和第一连接件粘接连接。通过在第一列电芯和第二列电芯之间设有第一通道，第一通道延伸至第一电路板，使第一绝缘件通过第一通道将电芯组件、第一电路板和第一连接件粘接连接，更好固定电芯。
可选地，在本申请的一些实施例中，沿第二方向，第一电路板的投影和电芯组件的投影均与第一绝缘体的投影有重叠，通过第一绝缘体对第一电路板和电芯组件进行绝缘和固定。
可选地，在本申请的一些实施例中，电芯包括电芯壳体、设于电芯壳体内的电极组件、以及连接至电极组件并且从电芯壳体引出的电极端子。第一绝缘件粘接于电极端子伸出电芯壳体部分，对电极端子伸出的部分进行绝缘，加强对电极端子的固定。
可选的，在本申请的一些实施例中，电极端子的投影部分位于第一绝缘件的投影内。第一绝缘件覆盖电极端子的部分。可对电极端子进行固定和绝缘，可对电极端进行散热。
可选地，在本申请的一些实施例中，电芯壳体包括第一部分和第二部分。第一部分容纳电极组件。第二部分连接第一部分。电极端子从第二部分伸出。第一绝缘件粘接于第二部分的至少部分。进一步对电极端子进行绝缘，进一步加强对电极端子的固定，进一步提升对电极端子的散热。
可选地，在本申请的一些实施例中，电芯组件还包括第二连接件，第一列电芯包括多个第一电芯组。第二列电芯包括多个第二电芯组。第二连接件连接第一电芯组和第二电芯组的沿第一方向设置的至少一个表面。第二连接件接触连接电芯，对电芯进行散热。
可选地，在本申请的一些实施例中，第二连接件包括第一部件，第一部件包括第一区段和第三区段。第一区段设于相邻第一电芯组之间。第三区段设于相邻第二电芯组之间。
可选地，在本申请的一些实施例中，第一部件还包括第二区段，第二区段设于第一电芯组和第二电芯组沿第二方向的间隙中，并连接第一区段和第三区段，可将第二空间整体作为第一通道进行灌胶。
可选地，在本申请的一些实施例中，还包括第三连接件，第三连接件设于第一电芯组和第二电芯组沿第二方向的间隙中，并连接第二区段，第二区段可将第二空间分隔为多个第一通道，灌胶设备可通过多个第一通道注入流动的绝缘材料，提升效率。
可选地，在本申请的一些实施例中，电芯组件还包括第一结构件。第一结构件包括第一分段和第二分段。第一分段连接第一部件。第一分段位于相邻第一电芯组之间。第二分段连接第一部件。第二分段位于相邻第二电芯组之间。
可选地，在本申请的一些实施例中，第一结构件可为电芯提供膨胀空间。
可选地，在本申请的一些实施例中，第一结构件包括带有微小闭孔结构的泡棉，限制注入流动的绝缘材料和第一结构件粘接。
可选地，在本申请的一些实施例中，第一结构件还包括连接第一分段和第二分段的第三分段。第三分段设于第一电芯组和第二电芯组沿第二方向的间隙中。第三分段连接第二连接件。
可选地，在本申请的一些实施例中，第一电路板设有第一连通孔。第一绝缘件可从第一连通孔流入第一连接件和第一电路板之间。第一连通孔可供第一绝缘件流入第一连接件内，提升第一绝缘件注入电池组的效率。
可选地，在本申请的一些实施例中，第一电路板设有第一通孔。沿第三方向，至少部分第一通孔的投影位于第一通道的投影内。第三方向垂直于第一方向和第二方向。第一通孔可供第一绝缘件流入电池组内，提升第一绝缘件注入电池组的效率。
可选地，在本申请的一些实施例中，第一连接件设有第三空间。第一电路板设于第三空间内。
可选地，在本申请的一些实施例中，第一连接件包括第一主体和连接于第一主体的第一凸部。第一凸部包括多个连接壁。第一主体和多个连接壁形成第三空间。沿第三方向，第一主体和第一电路板相对设置，第三方向垂直于第一方向和第二方向。
可选地，在本申请的一些实施例中，沿第一方向，第一凸部的投影与第一电路板的投影有重叠。沿第二方向，第一凸部的投影与第一电路板的投影有重叠。
可选地，在本申请的一些实施例中，沿第一方向，第一凸部的投影与电极端子的投影有重叠，可对电极端子进行绝缘。
可选地，在本申请的一些实施例中，沿第一方向，焊接部的投影位于第一凸部的投影内，进一步加强绝缘。
可选地，在本申请的一些实施例中，还包括第二绝缘件和连接于电芯组件的第一电连接部。第一连接件包括设于第一主体的第一开口和第二凸部。第二凸部设有第二凸部开口第二凸部开口和第一开口连通。第一电连接部穿过第一开口和第二凸部开口后延伸到第一连接件远离第一电路板的一侧。第二绝缘件设于第一开口和第一电连接部之间的间隙，通过第二凸部对第一电连接部进行绝缘，降低第一电连接部连接第一电路板部分发生短路的风险。
可选地，在本申请的一些实施例中，第一连接件靠近第一电路板的表面设有第一凸起。第一凸起连接第一电路板。沿第三方向，第一连接件与第一电路板之间具有第一间隙。第一间隙内设有第一绝缘件。第三方向同时垂直于第一方向和第二方向，便于第一绝缘件流动到第一间隙内，可通过第一绝缘件粘接 第一连接件和焊接部，还可对焊接部进行绝缘。
可选地，在本申请的一些实施例中，沿第一方向，第一通道的长度为6mm-30mm，和/或沿第二方向，第一通道的长度为6mm-80mm。
可选地，在本申请的一些实施例中，第一绝缘件通过第一通道将流动的绝缘材料注入电池组固化后形成。
本申请一实施例还提供了一种用电设备，包括上述任意实施例中的电池组。
本申请一实施例还提供了一种上述任意实施例中电池组的制造方法，包括以下步骤：组装电芯组件、第一电路板和第一连接件。电芯组件包括沿第一方向堆叠的第一列电芯和沿第一方向堆叠的第二列电芯。第一列电芯和第二列电芯沿第二方向间隔设置。第一列电芯和第二列电芯之间设有第一通道。将电芯组件、第一电路板和第一连接件倒立放置。通过第一通道由电芯组件背离第一电路板的一侧内注入流动的绝缘材料，绝缘材料固化后形成第一绝缘件。第一绝缘件固化后，将电芯组件、第一电路板和第一连接件设于壳体组件内。
上述的电池组、电池组的制造方法和用电设备通过在第一列电芯和第二列电芯之间设有第一通道，第一通道延伸至第一电路板，使第一绝缘件通过第一通道将电芯组件、第一电路板和第一连接件粘接连接，更好固定电芯。
附图说明
图1示出了一些实施例中电池组的结构示意图。
图2示出了一些实施例中电池组的分解示意图。
图3示出了一些实施例中第二壳体和第二电路板的结构示意图。
图4示出了一些实施例中电芯组件和第一连接件的结构示意图。
图5示出了图1中电池组沿II-II的剖面图。
图6示出了图5中电池组的部分放大图。
图7示出了另一些实施例中电池组沿II-II的剖面图。
图8示出了图7中电池组的部分放大图。
图9示出了一些实施例中单个电芯的结构示意图。
图10示出了一些实施例中单个电芯的分解示意图。
图11示出了一些实施例中电芯组件的结构示意图。
图12示出了一些实施例中电池组除去壳体组件的分解示意图。
图13示出了一些实施例中电池组部分结构示意图。
图14示出了一些实施例中多个第二连接件的结构示意图。
图15示出了一些实施例中另一视角的电池组部分结构示意图。
图16示出了另一些实施例中倒立放置的结构示意图。
图17示出了又一些实施例中电芯组件的结构示意图。
图18示出了一些实施例中电池组部分的结构示意图。
图19示出了另一些实施例中电池组部分结构示意图。
图20示出了一些实施例中电芯组件、第一电路板和第二连接件的结构示意图。
图21示出了一些实施例中第一电路板的结构示意图。
图22示出了一些实施例中第一电路板设有第一导电片和第二导电片的结构示意图。
图23示出了一些实施例中第一电路板和电芯的结构示意图。
图24示出了图4沿IV-IV的剖面图。
图25示出了一些实施例中另一视角的第一电路板和电芯的结构示意图。
图26示出了一些实施例中电芯连接第一电路板的结构示意图。
图27示出了一些实施例中第一连接件的结构示意图。
图28示出了一些实施例另一视角的第一连接件的结构示意图。
图29示出了一些实施例又一视角的第一连接件的结构示意图。
图30示出了一些实施例中电池组拆去第一壳体和第二壳体的结构示意图。
图31示出了图30中电池组拆去第一壳体和第二壳体沿III-III的剖面示意图。
图32示出了图31中剖面图的部分放大图。
图33示出了另一实施例中拆去第一壳体和第二壳体电池组沿III-III的剖面图。
图34示出了图33中剖面图的部分放大图。
图35示出了一些实施例中电池组的制造方法的流程图。
图36示出了一些实施例中用电设备的结构示意图。
主要元件符号说明：
电池组                  100
采样线束                 101
壳体组件                 10
第一壳体                 11
第一壁                  111
第二壁                  112
第三壁                  113
第四壁                  114
第五壁                  115
第二壳体                 12
翅片                  121
第二电路板                 13
连接支架                 14
电芯组件                 20
第一通道                 20a第一分通道                20a-1
第二分通道                20a-2
第二空间                 20b
电芯                   21
电芯壳体                 211
第一部分                 211a
第二部分                 211b
电极端子                 212
焊接部                 212a
第一端子                 212b
第二端子                 212c
第一列                  21a
第二列                  21b
第一电芯组             201、202、203
第二电芯组             204、205、206
第二连接件                 22
第一部件                221
第一区段                221a
第二区段                221b
第三区段                221c
第一外表面                201a
第二外表面                201b
第三外表面                204a
第四外表面                204b
第一侧边                2211
第二侧边                2212
第三侧边                2213
第一结构件                23
第一分段                231
第二分段                232
第三分段                233
第二结构件                24
第三结构件                25
第四结构件                26
导热件                 27
第二部件                222
第一电路板                30
孔                   31
第一孔                 311
第二孔                 312
第三孔                 313
第一导电片                32
第二导电片                33
第一连通孔                34
第二连通孔                35
第一通孔                 36
第一连接件                40
第一主体                 40a
第一表面                401
第一凸起                401a
第二表面                402
第一间隙                 403
第一凸部                 41
第一连接壁                411
第二连接壁                412
第三连接壁                413
第四连接壁                414
第三空间                 40b
第一开口                 42
第二凸部                 43
第二凸部开口               430
第二开口                 44
第三凸部                 45
第三凸部开口               450
第三开口                 46
第一区域                461
第二区域                462
第四凸部                 47
第四凸部开口               470
第一绝缘件                50
第三连接件                60
第一电连接部                70
第一导电部                71
第四区段                 71a
第五区段                 71b
第一绝缘部                72
第二电连接部                80
第二绝缘件                 90
用电设备                 200
第一方向                 X
第二方向                 Y
第三方向                  Z
如下具体实施例将结合上述附图进一步说明本申请。
具体实施方式
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行描述，显然，所描述的实施例仅仅是本申请一部分实施例，而不是全部的实施例。
当一个组件被认为是“设于”另一个组件，它可以是直接设在另一个组件上或者可能同时存在居中的组件。当一个组件被认为是“连接”另一个组件，它可以是直接连接在另一个组件上或者可能同时存在居中的组件。
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例的目的，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。
可以理解，当两元件或方向平行/垂直设置时，两元件之间可存在一定的夹角，两元件之间的夹角允许存在0-±5％的公差，例如当两元件垂直存在公差时，其中一元件向靠近或远离另一元件倾斜，两元件之间的公差范围大于0°且小于或等于4.5°。当两元件的投影相同或重叠时，两元件之间允许存在0-±10％的公差，例如其中一个元件与另一元件的投影形状相同，投影存在0-±10％的公差。
下面结合附图，对本申请的一些实施方式作详细说明。在不冲突的情况下，下述的实施方式及实施方式中的特征可以相互组合。
请参阅图1至图8，本申请一实施例提供了一种电池组100，包括壳体组件10、电芯组件20、第一电路板30和第一连接件40。电芯组件20设于壳体组件10内。第一电路板30设于壳体组件10内并连接电芯组件20。第一连接件40连接第一电路板30。电池组100包括第一通道20a，第一通道20a设于电芯组 件20背离第一连接件40的一侧，第一通道20a延伸至第一电路板30。
在一实施例中，电池组100还包括第一绝缘件50，通过第一通道20a将第一绝缘件50设于电芯组件20和第一电路板30之间的间隙，以及第一电路板30和第一连接件40之间间隙内，提升注入第一绝缘件50的效率。通过第一绝缘件50将电芯组件20、第一电路板30和第一连接件40粘接连接。电池组100受到外部的冲击力时，第一绝缘件50可提升对电池组100的保护。可选的，第一绝缘件50具有较好的导热系数，可对电芯组件20和第一电路板30进行散热，有利于改善电池组100的散热。
在一实施例中，通过第一通道20a将流动的绝缘材料注入电池组100固化后形成第一绝缘件50。可选的，第一绝缘件50包括灌封胶、发泡胶和粘接剂中的一种。可选的，第一绝缘件50包括树脂，将树脂加热融化后，通过灌注的方式将可流动的树脂设于电池组100后固化形成。可选的，第一绝缘件50包括灌封胶，通过灌注的方式将可流动的灌封胶设于电池组100后固化形成。
在一实施例中，壳体组件10包括第一壳体11和第二壳体12，第一壳体11连接第二壳体12。第一壳体11包括第一壁111、第二壁112、第三壁113、第四壁114和第五壁115。第一壁111和第二壁112相对设置，第三壁113和第四壁114相对设置，第五壁115与第二壳体12相对设置。第一壁111连接第三壁113和第四壁114，第二壁112连接第三壁113和第四壁114，第五壁115连接第一壁111、第二壁112、第三壁113和第四壁114，以形成第一空间，第一空间用于容纳电芯组件20、第一电路板30和第一连接件40中至少一个组件。在本实施例中，电芯组件20、第一电路板30和第一连接件40均容纳于第一空间内。在另一实施例中，电芯组件20和第一电路板30容纳于第一空间内，第一连接件40的部分容纳于第一空间内。在其它实施例中，电芯组件20容纳于第一空间内，第一电路板30和第一连接件40设于第一空间外。
为了更好的对电池组100的结构进行说明，将结合X、Y、Z坐标轴对电池组100的结构进行叙述，X、Y、Z坐标轴两两垂直,定义X方向为第一方向，Y方向为第二方向，Z方向为第三方向，其中，第一方向X为第一壁111和第二壁112的相对设置的方向，第二方向Y为第三壁113和第四壁114相对设置方向，第三方向Z为第五壁115和第二壳体12相对设置方向，第一方向X同时垂直于第二方向Y和第三方向Z。
在一实施例中，沿第一方向X，第一通道20a的长度D1为6mm-30mm，有利于灌注设备将流动的树脂注入第一通道20a，减少流动的树脂和其他结构件的粘接，比如和电芯组件20的粘接。可选的，沿第一方向X，第一通道20a的长度为10mm-20mm，进一提升灌注的效率。
在一实施例中，沿第二方向Y，第一通道20a的长度D2为6mm-80mm，有利于灌注设备将流动的树脂注入第一通道20a，减少流动的树脂和其他结构件的粘接，比如和电芯组件20的粘接。可选的，沿第二方向Y，第一通道20a的长度为10mm-60mm，进一提升灌注的效率。
在一实施例中，电芯组件20、第一电路板30和第一连接件40设于在第一壳体11内，电芯组件20和第一连接件40连接至第一壳体11。将电芯组件20、第一电路板30和第一连接件40倒立放置，电芯组件20、第一电路板30和第一连接件40依次设置，将流动的树脂或灌封胶通过第一通道20a注入电池组100内。可选的，倒置后电芯组件20、第一电路板30和第一连接件40沿第三方向Z依次设置。可选的，流动的树脂或灌封胶从电芯组件20的底部沿第三方向Z注入电池组100内。可选的，在将电芯组件20、第一电路板30和第一连接件40安装于第一壳体11内时，可先将第一壁111、第二壁112、第三壁113和第四壁114安装后再倒立放置注入流动的绝缘材料，第五壁115在灌胶完成后进行安装。进一步的，第五壁115在第一绝缘件50固化后进行安装。可选的，将电芯组件20、第一电路板30和第一连接件40倒立放置注入流动的绝缘材料化后形成第一绝缘件50后再安装第一壳体11和第二壳体12。
在一实施例中，电池组100还包括第二电路板13。第二电路板13设于第二壳体12内，并与第二壳体12绝缘设置。可选的，第二电路板13可为具有电池管理系统的电路板，用以智能化管理及维护各个电池单元，减少电池出现过充电和过放电，延长电池的使用寿命，监控电池的状态。
在一实施例中，电池组100还包括连接支架14，第一壳体11和第二壳体12连接于连接支架14。连接支架14设于第二电路板13和第一连接件40之间，可减小第二电路板13与第一连接件40之间短路的风险。可选的，连接支架14为绝缘材料制成。
在一实施例中，第一壳体11和第二壳体12包括导热材料，可提升散热性能。可选的，第一壳体11和第二壳体12包括金属导热材料和导热的绝缘材料， 绝缘材料可覆盖在金属导热材料外表面。可选的，第一壳体11和第二壳体12的金属导热材料包括铝。可选的，第二壳体12的外壁设有翅片121，翅片121沿第二方向Y排列并连接第二壳体12，进一步提升散热性能。
请参阅图8、图9和图10，在一实施例中，电芯组件20包括多个电芯21，多个电芯21沿第一方向X堆叠设置。每个电芯21包括电芯壳体211、设于电芯壳体211内的电极组件213、以及连接至电极组件213并且从电芯壳体211引出的电极端子212。在一实施例中，电芯壳体211包括第一部分211a和第二部分211b，第一部分211a容纳电极组件213，第二部分211b连接第一部分211a，电极端子212从第二部分211b伸出。可选的，第一绝缘件50设于第一连接件40和电芯壳体211之间，第一绝缘件50覆盖第一电路板30以及电芯组件20的部分。可选的，第一绝缘件50粘接电极端子212，沿第二方向Y，电极端子212的投影与第一绝缘件50的投影有重叠。可选的，电极端子212的投影部分位于第一绝缘件50的投影内，第一绝缘件50覆盖电极端子212的部分，可对电极端子212进行固定和绝缘，可对电极端子212进行散热。可选的，电极端子212伸出第二部分211b的投影位于第一绝缘件50的投影内。可选的，第一绝缘件50粘接电极端子212伸出第二部分211b的部分，对电极端子212伸出第二部分211b的部分进行绝缘，加强对电极端子212的固定，提升对电极端子212的散热。比如，第一绝缘件50粘接电极端子212伸出第二部分211b的全部结构，或第一绝缘件50粘接电极端子212伸出第二部分211b的部分结构。可选的，第二部分211b的投影与第一绝缘件50的投影有重叠，第一绝缘件50粘接第二部分211b的至少部分，进一步对电极端子212进行绝缘，进一步加强对电极端子212的固定，进一步提升对电极端子212的散热。
在一实施例中，电芯壳体211包括第一外壳2111和第二外壳2112，第一外壳2111连接第二外壳2112。第一外壳2111和第二外壳2112沿连接位置可以进行折叠，使第一外壳2111和第二外壳2112重合，形成第一部分211a，以包覆电极组件213。第一外壳2111的周侧向外延伸形成多个第一延伸部2113，第二外壳2112的周侧向外延伸形成多个第二延伸部2114。第一外壳2111和第二外壳2112沿连接位置折叠后，第一延伸部2113和第二延伸部2114重合并密封连接，形成第二部分211b。第二部分211b包括第一密封部2115和第二密封部2116，第一密封部2115与连接位置相对设置，电极端子212自第一密封部2115 伸出第一部分211a。可选的，第二部分211b包括两个第二密封部2116，两个第二密封部2116沿第二方向Y相对设置。可选的，第二部分211b包括一个第一密封部2115，电芯21包括两个电极端子212，两个电极端子212自第一密封部2115延伸出电芯壳体211。在其他实施例中，第一外壳2111和第二外壳2112相离，第二部分211b包括两个第一密封部2115，两个第一密封部2115沿第三方向Z相对设置，电芯21包括两个电极端子212，其中一个电极端子212自其中一个第一密封部2115延伸出电芯壳体211，另外一个电极端子212自另外一个第一密封部2115延伸出电芯壳体211，两个电极端子212沿第三方向Z相对设置。
在一实施例中，电极组件213包括由正极片、负极片以及隔离膜卷绕形成的卷绕式结构。在另一些实施例中，电极组件213还可以为叠片结构，即，正极片、隔离膜和负极片依次层叠形成一个电极组件213单元，多个电极组件213单元再层叠成电极组件213。可选的，电芯壳体211包括铝塑膜。可选的，电芯21包括软包电芯。
在一实施例中，电芯21接触连接第一壳体11，将电芯21的热量通过第一壳体11散到外部环境。
在一实施例中，电极端子212具有延伸出电芯壳体211外的焊接部212a，焊接部212a为电极端子212弯折后形成。相邻的电芯21的电极端子212相向弯折并与第一电路板30连接。在一实施例中，电极端子212包括第一端子212b和第二端子212c，第一端子212b和第二端子212c极性相反，第一端子212b和第二端子212c中的一个为正极端子，另一个为负极端子。沿第三方向Z，电芯21的第一端子212b的焊接部212a的投影与相邻电芯21的第二端子212c的焊接部212a的投影至少部分重叠。相邻电芯的第一端子212b和第二端子212c相向弯折，且第一端子212b的焊接部212a和第二端子212c的焊接部212a相互堆叠连接设置，实现电芯21之间的串联连接。通过将相邻电芯21的焊接部212a相互连接设置，将焊接部212a连接第一电路板30，减少加工工艺步骤。
在其他实施例中，沿第三方向Z，电芯21的第一端子212b的投影还可以与相邻电芯21的第一端子212b的投影至少部分重叠，并通过第一电路板30连接，实现电芯21之间的并联连接。
请参阅图11，在一实施例中，电芯组件20包括沿第一方向X堆叠设置的 多个电芯21，其中部分电芯21沿第一方向X堆叠设置为第一列21a，部分电芯21沿第一方向X堆叠设置为第二列21b，第一列21a与第二列21b沿第二方向Y间隔排列设置。第一列21a与第二列21b之间具有第二空间20b。可选的，第一通道20a设于第二空间20b。可选的，以第二空间20b作为第一通道20a。可选的，当升级第一列21a和第二列21b电芯的规格时，通过减小第二空间20b沿第二方向Y的长度，使升级后的第一列21a和第二列21b电芯占据部分第二空间20b，便于提升电芯21的容量。可选的，第一列21a包括电芯21a-1，第二列21b包括电芯21b-1，电芯21a-1和电芯21b-1沿第二方向Y间隔排列设置，以电芯21a-1和电芯21b-1之间的间隙作为第一分通道20a-1。可选的，第一列21a包括电芯21a-2，第二列21b包括电芯21b-2，电芯21a-1和电芯21a-2沿第一方向X依次设置，电芯21b-1和电芯21b-2沿第一方向X依次设置，电芯21a-2和电芯21b-2沿第二方向Y间隔排列设置，以电芯21a-2和电芯21b-2之间的间隙作为第二分通道20a-2。可选的，第一分通道20a-1和第二分通道20a-2可以单独作为第一通道20a进行灌胶。可选的，第一分通道20a-1和第二分通道20a-2连通，并作为第一通道20a进行灌胶。
在一实施例中第一列21a还可以至少包括沿第一方向X依次设置的电芯21a-3、电芯21a-4、电芯21a-5、电芯21a-6和电芯21a-7，以第一列21a中沿第一方向X依次相邻设置的两个电芯作为第一电芯组，例如电芯21a-1和电芯21a-2作为第一电芯组201，电芯21a-3和电芯21a-4作为第一电芯组202，电芯21a-5和电芯21a-6作为第一电芯组203。可选的，第二列21b还可以至少包括沿第一方向X依次设置的电芯21b-3、电芯21b-4、电芯21b-5、电芯21b-6和电芯21b-7。以第二列21b中沿第一方向X依次相邻设置的两个电芯作为第二电芯组，例如电芯21b-1和电芯21b-2作为第二电芯组204，电芯21b-3和电芯21b-4作为第二电芯组205，电芯21b-5和电芯21b-6作为第二电芯组206。第一电芯组201和第二电芯组204沿第二方向Y间隔排列设置，以第一电芯组201和第二电芯组第204之间的间隙作为第一通道20a。第一电芯组202和第二电芯组205沿第二方向Y间隔排列设置，以第一电芯组202和第二电芯组205之间的间隙作为另一第一通道20a。第一电芯组203和第二电芯组206沿第二方向Y间隔排列设置，以第一电芯组203和第二电芯组206之间的间隙作为又一第一通道20a。多个第一通道20a沿第一方向X排列设置。在其他的实施例中，第一电芯 组也可为二个以上的电芯21组成，第二电芯组也可为二个以上的电芯21组成，比如第一电芯组由三个电芯21组成，第二电芯组由三个电芯21组成。
可选的，第一电芯组由一个电芯21组成，第二电芯组由一个电芯21组成，-比如在图12中，第一电芯组可由电芯21a-7组成，第二电芯组可由电芯21b-7组成。可选的，部分第一电芯组由一个电芯21组成，部分第一电芯组由一个以上电芯21组成，部分第二电芯组由一个电芯21组成，部分第二电芯组由一个以上电芯21组成。
请参阅图11至图15，在一实施例中，电芯组件20还包括多个第二连接件22，第二连接件22设于相邻的第一电芯组之间和相邻的第二电芯组之间。可选的，第二连接件22接触连接电芯21，对电芯21进行散热。可选的，第二连接件22接触连接第一壳体11，将电芯21的热量传递至第一壳体11，通过第一壳体11对电芯21进行散热。
在一实施例中，第二连接件22包括第一部件221。可选的，第一部件221包括沿第二方向Y设置的第一区段221a、第二区段221b和第三区段221c。第一区段221a连接第一电芯组沿第一方向X设置的外表面，沿第三方向Z观察，第一区段221a设于相邻的第一电芯组之间。沿第一方向X，第一区段221a的投影位于第一电芯组的电芯壳体211的投影内。沿第三方向Z观察，第二区段221b设于第二空间20b内，并连接第一区段221a和第三区段221c，第二区段221b可将第二空间20b分隔为多个第一通道20a，灌胶设备可通过多个第一通道20a注入流动的绝缘材料，提升效率。第三区段221c连接第二电芯组沿第一方向X设置的外表面。沿第三方向Z观察，第三区段221c设于相邻的第二电芯组之间。沿第一方向X，第三区段221c的投影位于第二电芯组的电芯壳体211的投影内。通过第一区段221a对第一电芯组进行散热，通过第三区段221c对第二电芯组进行散热，通过第二区段221b连接第一区段221a和第三区段221c可增加散热面积以及第二连接件22的强度。第一电芯组201包括沿第一方向X设置的第一外表面201a和第二外表面201b，第二电芯组204包括沿第一方向X设置的第三外表面204a和第四外表面204b。第二外表面201b连接有第一区段221a，可对电芯21a-2和电芯21a-3进行散热。第四外表面204b连接有第三区段221c，可对电芯21b-2和电芯21b-3进行散热。第二区段221b设于第二空间20b内，可增加散热面积，进一步提升散热。相邻的两个第二区段221b以及第 一电芯组201和第二电芯组204相对的侧面形成第一通道20a，便于将流动的树脂或灌封胶从电芯21的底部沿第三方向Z注入电池组100内形成第一绝缘件50。
在一实施例中，电芯组件20还包括第一结构件23，第一结构件23连接第一部件221。沿第一方向X，第一结构件23的投影位于第一部件221的投影内。可选的，第一结构件23包括第一分段231和第二分段232，第一分段231设于连接第一部件221，第一分段231位于相邻第一电芯组之间，第二分段232连接第一部件221，第二分段232位于相邻第二电芯组之间。可选的，第一结构件23包括弹性件，电芯21膨胀时，第一结构件23可被压缩，为电芯21提供膨胀空间，可选的，第一结构件23包括泡棉。可选的，第一结构件23占粘接于第二连接件22。
在一实施例中，第一结构件23还包括连接第一分段231和第二分段232的第三分段233，第三分段233位于第二空间20b内，第三分段233连接于第二区段221b。可选的，第一结构件23包括带有微小闭孔结构的泡棉，限制注入流动的绝缘材料和第一结构件23粘接。
在一些实施例中，相邻的第一电芯组之间设置有两个第二连接件22，一个第二连接件22连接于其中第一电芯组，另一个第二连接件22连接于另外的一个第一电芯组，第一结构件23位于两个第二连接件22之间，有利于提升对电芯21的散热。第一分段231位于两个第一区段221a之间，第二分段232位于两个第三区段221c之间，第三分段233位于两个第二区段221b之间。其中一个第一区段221a连接于其中第一电芯组，另一个第一区段221a连接于另外一个第一电芯组，其中一个第三区段221c连接于其中第二电芯组，另一个第三区段221c连接于另外一个第二电芯组。
请参阅图12，在一实施例中，第一部件221包括沿第二方向Y设置的第一区段221a和第三区段221c，第一区段221a和第三区段221c间隔设置。第一区段221a连接第一电芯组沿第一方向X设置的外表面，沿第一方向X，第一区段221a的投影位于第一电芯组的电芯壳体211的投影内。第三区段221c连接第二电芯组沿第一方向X设置的外表面。沿第一方向X，第三区段221c的投影位于第二电芯组的电芯壳体211的投影内。沿第一方向X，第一部件221的投影与第二空间20b的投影相离，第一区段221a和第三区段221c未设置于第二空间 20b内，可将第二空间20b整体作为第一通道20a进行灌胶，提升灌胶效率。
可选的，第一部件221设于相邻的电芯之间。进一步的，第一区段221a设于第一列电芯21a相邻电芯之间，第三区段221c设于第二列电芯21b相邻电芯之间。以第一电芯组201为例进行说明，一第一区段221a连接第一外表面201a，一第一区段221a连接第二外表面201b，另一第一区段221a位于电芯21a-1和电芯21a-2之间，并连接电芯21a-1和电芯21a-2的表面，可增加第一部件221接触电芯的面积，提升散热效果。
请参阅图13，可选的，电芯组件20还包括第二结构件24，第二结构件24设于相邻的电芯21之间。可选的，第二结构件24设于第一电芯组相邻的电芯之间。可选的，第二结构件24设于第二电芯组相邻的电芯之间。沿第一方向X，第二结构件24的投影位于电芯壳体211的投影内。可选的，第二结构件24包括弹性件，电芯21膨胀时，第二结构件24可被压缩，为电芯21提供膨胀空间，可选的，第二结构件24包括泡棉。
请参阅图13，可选的，电芯组件20还包括第三结构件25，第三结构件25设于电芯21与第一部件221之间。可选的，第三结构件25包括粘接件，可将第一部件221粘接于电芯壳体211上。可选的，第三结构件25包括弹性件，电芯21膨胀时，第三结构件25可被压缩，为电芯21提供膨胀空间，可选的，第三结构件25包括泡棉。可选的，泡棉连接第一部件221和电芯壳体211的表面设有粘接剂。
请参阅图12，可选的，电池组100还包括第四结构件26。沿第一方向X，第四结构件26位于电芯组件20最外侧的两个表面和第一壁111之间，可将电芯组件20粘接于第一壁111和第二壁112上。可选的，第四结构件26包括绝缘材料。可选的，第四结构件26的导热系数小于第二连接件22的导热系数，第四结构件26可限制电芯组件20的热量通过第四结构件26传递到第一壁111和第二壁112，减小电芯21之间的温差。
在一些实施例中，电池组100还包括导热件27，第四结构件26位于导热件27和第一壁111之间，导热件27连接于电芯21，有利于提升电芯21的散热。可选的，导热件27和第二连接件22具有相同的结构。可选的，导热件27导热系数小于第二连接件22的导热系数，减小电芯21之间的温差。
在一实施例中，第二连接件22还包括第二部件222，第二部件222连接第一部件221的侧边。第二部件222从相邻的电芯21之间伸出，并朝向电芯21弯折，使第二部件222连接电芯壳体211。可选的，第二部件222接触连接电芯壳体211。可选的，第二部件222与电芯壳体211通过其他结构件连接，例如导热垫或导热胶等。沿第二方向Y，第二部件222的投影与电芯21的投影至少部分重叠。通过设置第二部件222接触连接电芯壳体211，增加第二连接件22与电芯壳体211的接触面积，将热量通过电芯壳体211传导至第二部件222，再由第二部件222传导至第一壳体11，提升对电芯21的散热效果。
在一实施例中，沿第二方向Y，第一部件221包括第一侧边2211和第二侧边2212，第二部件222连接第一侧边2211和第二侧边2212。沿第二方向Y，第二部件222的投影位于电芯壳体211的投影内。第一部件221还包括第三侧边2213，第三侧边2213连接第一侧边2211和第二侧边2212，第三侧边2213设有两个第二部件222，两个第二部件222分隔连接第三侧边2213。沿第三方向Z，第二部件222的投影位于电芯壳体211的投影内，并且第二部件222的投影与第二空间20b的投影相离，将第二部件222分隔设于第三侧边2213，可减少对第一通道20a的遮挡，便于灌胶。
在一实施例中，第一部件221和第二部件222一体折弯成型，以增加第二连接件22的结构强度。可选的，第二连接件22为铝壳。
请参阅图17、图18、图19和图20，在一实施例中，电池组100还包括第三连接件60，第三连接件60设于第二空间20b内，并连接第二连接件22。可选的，第三连接件60与第二密封部2116间隔设置。可选的，第三连接件60与第二密封部2116接触连接。第三连接件60沿第三方向Z连续延伸设置。沿第二方向Y，第三连接件60的投影位于第一部分211a和第二部分211b的投影内。可选的，第三连接件60设于第一电芯组和第二电芯组之间沿第二方向Y的间隙内，第三连接件60连接第二区段221b并靠近第一电芯组设置，可提升电芯组件20的结构强度。第三连接件60与第二电芯组之间的间隙作为第一通道20a进行灌胶。可选的，第三连接件60设于第一电芯组和第二电芯组之间沿第二方向Y的间隙内，第三连接件60连接第二区段221b并靠近第二电芯组设置，可提升电芯组件20的结构强度。第三连接件60与第一电芯组之间的间隙作为第一通道20a进行灌胶。可选的，第一电芯组和第二电芯组之间沿第二方向Y的 间隙设有分隔设置的第三连接件60，一第三连接件60连接第二区段221b并靠近第一电芯组设置，另一第三连接件60连接第二区段221b并靠近第二电芯组设置，可进一步提升电芯组件20的结构强度。以两个第三连接件60之间的间隙作为第一通道20a进行灌胶。可选的，可通过减小第三连接件60沿第二方向Y的长度，升级第一列21a和第二列21b电芯的规格，便于提升电芯21的容量。可选的，第三连接件60包括弹性件，电第三连接件60可被压缩，可为电芯组件20提供缓冲，可选的，第三连接件60包括泡棉。
请参阅图21、图22、图23和图24，第一电路板30设有多组孔31，每组孔31包括沿第一方向X设置的第一孔311和第二孔312。第一孔311和第二孔312沿第二方向Y延伸设置。相邻电芯21的第一端子212b穿过第一孔311，另一电芯21的第二端子212c穿过第二孔312，第一端子212b的焊接部212a和第二端子212c的焊接部212a相互堆叠后连接第一电路板30。
可选的，电池组100包括多个第一导电片32，第一导电片32连接第一电路板30，相邻电芯21的第一端子212b穿过第一孔311，另一电芯21的第二端子212c穿过第二孔312，第一端子212b的焊接部212a和第二端子212c的焊接部212a相互堆叠后焊接于第一导电片32上。焊接包括激光焊接、超声波焊接等。在其他实施例中，焊接部212a与第一导电片32也可以通过导电胶等其他的连接方式。
可选的，每组孔31还包括第三孔313，沿第三方向Z观察，第三孔313位于第一孔311和第二孔312之间。沿第三方向Z，第三孔313的投影与第一导电片32的投影有重叠。可选的，沿第三方向Z，第三孔313的投影位于第一导电片32的投影内。通过设置第三孔313，可便于第一绝缘件50从第三孔313流入第一连接件40内。
在一实施例中，第一电路板30还设有第二导电片33。第二导电片33连接沿第二方向Y排列设置的两个电芯21的电极端子212，用于将电流从第一列21a传递至第二列21b，实现第一列21a和第二列21b之间的串联连接或并联连接。可选的，沿第三方向Z，第二导电片33的厚度大于第一导电片32的厚度。通过增加第二导电片33的厚度，可增大电流的传输。
在一实施例中，第一电路板30还设有多个第一连通孔34，沿第三方向Z，第一连通孔34贯穿第一电路板30。部分第一连通孔34沿第二方向Y排列设置， 部分第一连通孔34沿第一方向X排列设置。第一连通孔34可供第一绝缘件50流入第一连接件40内，提升第一绝缘件50注入电池组100的效率。
在一实施例中，第一电路板30还设有多个第二连通孔35，多个第二连通孔35沿第一方向X排列设置，沿第二方向Y，多个第二连通孔35设于第一电路板30的中间位置。电池组100还包括采样线束101，采样线束101通过多个第二连通孔35连接于第一电路板30。
请参阅图25和图26，在一实施例中，第一电路板30还设有多个第一通孔36，可选的，第一通孔36沿第二方向Y设于第二连通孔35的一侧，第一通孔36可供第一绝缘件50流入电池组100内，提升第一绝缘件50注入电池组100的效率。可选的，第一通孔36的孔径大于第一连通孔34的孔径，进一步提升第一绝缘件50注入电池组100的效率。可选的，第一电路板30设有两列第一通孔36，两列第一通孔36沿第二方向Y设于第二连通孔35的两侧。
在一实施例中，沿第三方向Z观察，第一通孔36位于第二空间20b内。可选的，沿第三方向Z，至少部分第一通孔36的投影位于第一通道20a的投影内，从第一通道20a注入的第一绝缘件50可通过从第一通孔36流动到第一电路板30和第一连接件40之间，进一步提升第一绝缘件50注入电池组100的效率。
在一实施例中，电池组100还包括第一电连接部70和第二电连接部80。可选的，第一电连接部70和第二电连接部80焊接于第一电路板30。第一电连接部70连接第一端子212b和第二端子212c中的一个，第二电连接部80连接另一个。第一电连接部70和第二电连接部80连接第二电路板13，通过第一电连接部70和第二电连接部80将电芯21的能量传递至外部使用设备。可选的，第一电连接部70和第二电连接部80包括铜排。
在一实施例中，第一电连接部70包括第一导电部71和第一绝缘部72。第一绝缘部72包覆第一导电部71的部分，第一导电部71的两端凸出第一绝缘部72，其中第一导电部71的一端连接第一电路板30以及电第一端子212b和第二端子212c中的一个，另一端连接第二电路板13。可选的，第一导电部71包括第四区段71a和第五区段71b，第四区段71a沿第三方向Z设置，第五区段71b沿与第一方向X相反的方向弯折设置。可选的，第五区段71b可为软性结构。可选的，第五区段71b包括多个层叠设置的软铜排单片。
在一实施例中，第二电连接部80的结构与第一电连接部70的结构相同， 区别在于第一导电部71连接第一电路板30的一端沿与第二方向Y相反的方向延伸，第二电连接部80连接第一电路板30的一端沿第二方向延伸。
在第一壳体11和第二壳体12进行组装时，首先将第一电连接部70与第二电路板13进行组装，具体的，先将第五区段71b弯折至大致第三方向Z，然后将第五区段71b连接至第二电路板13，将第二壳体12连接第一壳体11，在第二壳体12盖设于第一壳体11的过程中，带动第五区段71b从第三方向Z弯折至大致与第一方向X相反的方向，然后完成第一壳体11和第二壳体12的组装。可以理解的是，第一电连接部70的在第一壳体11和第二壳体12组装完成后的状态为第一电连接部70的初始状态，可减少第一电连接部70的长度，进而减少能量回路的长度，且可减轻第一电连接部70的重量。
请参阅图27至图34，第一连接件40具有绝缘性。可选的，第一连接件40由绝缘材料制成。可选的，第一连接件40由金属材料和绝缘材料制成，绝缘材料可覆盖在金属材料外表面。
在一实施例中，第一连接件40包括第一主体40a，第一主体40a连接第一电路板30，对第一电路板30进行绝缘。第一连接件40设有第一凸部41，第一凸部41设于第一主体40a的边缘。第一凸部41包括第一连接壁411、第二连接壁412、第三连接壁413和第四连接壁414，第一连接壁411和第二连接壁412沿第一方向X连接第一主体40a的边缘，第三连接壁413和第四连接壁414沿第二方向Y连接第一主体40a的边缘，第一连接壁411、第二连接壁412、第三连接壁413、第四连接壁414和第一主体40a配合形成第三空间40b，第一电路板30设于第三空间40b内。可选的，沿第一方向X或第二方向Y，第一凸部41的投影与第一电路板30的投影有重叠，通过第一凸部41限制第一电路板30的位置，便于组装。可选的，沿第一方向X或第二方向Y，第一电路板30的投影位于第一凸部41的投影内。可选的，沿第一方向X或第二方向Y，第一凸部41的投影与电极端子212的投影有重叠，可对电极端子212进行绝缘。可选的，沿第一方向X或第二方向Y，焊接部212a的投影位于第一凸部41的投影内，进一步加强绝缘。可选的，沿第一方向X或第二方向Y，第一绝缘件50的投影位于第一凸部41的投影内。可选的，第一连接壁411、第二连接壁412、第三连接壁413和第四连接壁414的外表面设有粘接剂，可将第一连接件40粘接于第一壳体11，固定第一连接件40。进一步的，第一连接壁411粘接于第一壁 111，第二连接壁412粘接于第二壁112，第三连接壁413粘接于第三壁113，第四连接壁414粘接于第四壁114。可选的，粘接剂包括导热胶。
第一连接件40设有第一开口42，沿第三方向Z，第一开口42贯穿第一主体40a的表面。第一电连接部70穿过第一开口42后延伸到第一连接件40远离第一电路板30的一侧。可选的，第一连接件40设有第二凸部43，第二凸部43设于第一开口42的边缘，第二凸部43限制第一电连接部70的位置，第二凸部43设有第二凸部开口430，第二凸部开口430和第一开口42连通，第一电连接部70穿过第一开口42、第二凸部开口430后延伸到第一连接件40远离第一电路板30的一侧。沿第一方向X，第一导电部71连接第一电路板30部分的投影位于第二凸部43的投影内。通过第二凸部43对第一导电部71进行绝缘，降低第一导电部71连接第一电路板30部分发生短路的风险。可选的，第一绝缘部72位于第二凸部43形成的空间内，增加第二凸部43沿第三方向Z的长度，进一步提升对第一导电部71连接第一电路板30部分的绝缘。
在一实施例中，第一主体40a设有第二开口44，第二电连接部80穿过第二开口44。可选的，第一连接件40设有第三凸部45，第三凸部45设于第二开口44的边缘。第三凸部45限制第二电连接部80的位置，第三凸部45设有第三凸部开口450，第三凸部开口450和第二开口44连通，第二电连接部80穿过第二开口44、第三凸部开口450后延伸到第一连接件40远离第一电路板30的一侧。沿第一方向X，第二电连接部80连接第一电路板30部分的投影位于第三凸部45的投影内。通过第三凸部45对第二电连接部80进行绝缘，降低第二电连接部80连接第一电路板30部分发生短路的风险。
在一实施例中，第一主体40a设有第三开口46，第三开口46贯穿第一主体40a的表面，采样线束101穿过第三开口46。第一连接件40设有第四凸部47，第四凸部47设于第三开口46的边缘，第四凸部47限制采样线束101的位置，第四凸部47设有第四凸部开口470，第四凸部开口470和第三开口46连通，采样线束101穿过第三开口46、第四凸部开口470后延伸到第一连接件40远离第一电路板30的一侧。沿第一方向X，采样线束101连接第一电路板30部分的投影位于第四凸部47的投影内。通过第四凸部47对采样线束101进行绝缘，降低采样线束101连接第一电路板30部分发生短路的风险。
在一实施例中，电池组100还包括第二绝缘件90，第二绝缘件90连接第 一连接件40。在第一电连接部70穿过第一开口42和第二凸部开口430后、第二电连接部80穿过第二开口44和第三凸部开口450后以及采样线束101穿过第三开口46和第四凸部开口470后，第二绝缘件90从第二凸部开口430设于第一开口42、从第三凸部开口450设于第二开口44和从第四凸部开口470设于第三开口46，可将第一电连接部70固定于第一开口42和第二凸部开口430中、第二电连接部80固定于第二开口44和第三凸部开口450中以及将采样线束101固定于第三开口46和第四凸部开口470中，还可在封闭第一开口42、第二开口44和第三开口46，将第一壳体11倒置进行灌胶时，减少第一绝缘件50从第一连接件40的开口流出。可选的，第二绝缘件90设于第一开口42和第一电连接部70之间的间隙。可选的，第二绝缘件90包括树脂，将树脂加热融化后，通过灌注的方式将可流动的第二绝缘件90设于第一连接件40的开口后固定形成。可选的，第二绝缘件90包括快干胶。可选的，注入第一开口42、第二开口44和第三开口46的第二绝缘件90部分流动到第一电路板30和第一连接件40之间，可粘接第一电路板30和第一连接件40。
可选的，第三开口46包括第一区域461和第二区域462，沿第二方向Y，第一区域461的宽度大于第二区域462的宽度。第二区域462用于供采样线束101上的元件通过，第一区域461用于供采样线束101的线路穿过。通过减小第二区域462的宽度，可以减少第二绝缘件90的用量。
在一实施例中，第一主体40a包括沿第三方向Z设置的第一表面401和第二表面402，第一表面401远离第一电路板30，第二表面402靠近第一电路板30。第一表面401设有第一凸起401a，第一凸起401a由第二表面402向第一表面401沿与第三方向Z相反的方向凹陷形成。可选的，第一凸起401a沿第二方向Y延伸设置，可提升第一主体40a的结构强度。可选的，第一凸起401a设置为多个，多个第一凸起401a沿第一方向X排列设置，进一步提升第一主体40a的结构强度。可选的，第一凸起401a连接第一电路板30，并位于相邻的第一导电片32之间。第一凸起401a沿第三方向Z的高度大于第一导电片32的厚度与连接于第一导电片32上的焊接部212a的厚度和，通过第一凸起401a支撑第一主体40a，使第一表面401与焊接部212a之间具有第一间隙403，第一间隙403内设有第一绝缘件50，第一绝缘件50流动到第一间隙403内，可通过第一绝缘件50粘接第一连接件40和焊接部212a，还可对焊接部212a进行绝缘。
请参阅图35，本申请还提供一种上述电池组100的制造方法，具体包括以下步骤：
步骤1，组装电芯组件20、第一电路板30和第一连接件40，电芯组件包括沿第一方向堆叠的第一列电芯和沿第一方向堆叠的第二列电芯，第一列电芯和第二列电芯沿第二方向间隔设置，第一列电芯和第二列电芯之间设有第一通道；
步骤2，将电芯组件20、第一电路板30和第一连接件40倒立放置，通过第一通道由所述电芯组件背离所述第一电路板的一侧内注入流动的绝缘材料，绝缘材料固化后形成第一绝缘件50；
步骤3，第一绝缘件50固化后，将电芯组件20、第一电路板30和第一连接件40设于壳体组件内。
在一实施例中，步骤1和步骤2之间，包括将第一电连接部70穿过后，第二绝缘件90注入第一连接件40上的开口，第二绝缘件90封闭第一连接件40和第一电连接部70之间的间隙。
在一实施例中，步骤1和步骤2之间，包括在第一电连接部70穿过第一开口42和第二凸部开口430后、第二电连接部80穿过第二开口44和第三凸部开口450后以及采样线束101穿过第三开口46和第四凸部开口470后，将注入流动的绝缘材料从第二凸部开口430设于第一开口42、从第三凸部开口450设于第二开口44和从第四凸部开口470设于第三开口46，并等待绝缘材料固化。
在一实施例中，步骤2中倒立放置可为将电芯组件20、第一电路板30沿与第三方向Z平行的方向依次放置。
在一实施例中，步骤2中第一连接件40倒立放置可为将第一连接件40的第三空间40b的开口朝向沿与第三方向Z相反的方向设置。
在一实施例中，步骤3具体包括将电芯组件20、第一电路板30和第一连接件40安装于第一壳体11内后，第一电连接部70、第二电连接部80以及采样线束101穿过第一连接件40的部分均未超出第一壳体11的高度。
在一实施例中，步骤3具体包括将第二电路板13安装于第二壳体12，弯折第一电连接部70和第二电连接部80，将第一电连接部70和第二电连接部80连接第二电路板13，然后将第二壳体12连接第一壳体11，完成电池组100的组装。
请参阅图36，本申请还提供一种采用上述电池组100的用电设备200。在一实施方式中，本申请的用电设备200可以是，但不限于无人机、备用电源、电动汽车、电动摩托车、电动助力自行车、电动工具、家庭用大型蓄电池等。
本技术领域的普通技术人员应当认识到，以上的实施例仅是用来说明本申请，而并非用作为对本申请的限定，只要在本申请的实质精神范围内，对以上实施例所作的适当改变和变化都落在本申请公开的范围内。

Claims (22)

  1. 一种电池组，其特征在于，包括：
    壳体组件；
    电芯组件，设于所述壳体组件内，所述电芯组件包括沿第一方向堆叠的第一列电芯和沿所述第一方向堆叠的第二列电芯，所述第一列电芯和第二列电芯沿第二方向间隔设置，所述第一列电芯和第二列电芯之间设有第一通道，所述第二方向垂直于所述第一方向；
    第一电路板，连接所述电芯组件，所述第一通道延伸至所述第一电路板；
    第一连接件，设于所述壳体组件内；
    第一绝缘件，用于将所述电芯组件、第一电路板和第一连接件粘接连接。
  2. 如权利要求1所述的电池组，其特征在于，沿所述第二方向，所述第一电路板的投影和所述电芯组件的投影均与所述第一绝缘体的投影有重叠。
  3. 如权利要求1所述的电池组，其特征在于，所述电芯包括电芯壳体、设于所述电芯壳体内的电极组件、以及连接至所述电极组件并且从所述电芯壳体引出的电极端子，所述第一绝缘件粘接于所述电极端子伸出所述电芯壳体部分。
  4. 如权利要求3所述的电池组，其特征在于，所述电芯壳体包括第一部分和第二部分，所述第一部分容纳所述电极组件，所述第二部分连接所述第一部分，所述电极端子从所述第二部分伸出，所述第一绝缘件粘接于所述第二部分的至少部分。
  5. 如权利要求1所述的电池组，其特征在于，所述电芯组件还包括第二连接件，所述第一列电芯包括多个第一电芯组，所述第二列电芯包括多个第二电芯组，所述第二连接件连接所述第一电芯组和所述第二电芯组的沿所述第一方向设置的至少一个表面。
  6. 如权利要求5所述的电池组，其特征在于，所述第二连接件包括第一部件，所述第一部件包括第一区段和第三区段，所述第一区段设于相邻第一电芯组之间，所述第三区段设于相邻第二电芯组之间。
  7. 如权利要求6所述的电池组，其特征在于，所述第一部件还包括第二区段，所述第二区段设于所述第一电芯组和第二电芯组沿所述第二方向的间隙中，并连接所述第一区段和第三区段。
  8. 如权利要求7所述的电池组，其特征在于，还包括第三连接件，所述第三连接件设于所述第一电芯组和第二电芯组沿所述第二方向的间隙中，并连接所述第二区段。
  9. 如权利要求6所述的电池组，其特征在于，所述电芯组件还包括第一结构件，所述第一结构件包括第一分段和第二分段，所述第一分段连接所述第一部件，第一分段位于相邻所述第一电芯组之间，第二分段连接所述第一部件，第二分段位于相邻所述第二电芯组之间。
  10. 如权利要求9所述的电池组，其特征在于，所述第一结构件可为所述电芯提供膨胀空间。
  11. 如权利要求9所述的电池组，其特征在于，第一结构件还包括连接所述第一分段和所述第二分段的第三分段，所述第三分段设于所述第一电芯组和第二电芯组沿所述第二方向的间隙中，第三分段连接所述第二连接件。
  12. 如权利要求1所述的电池组，其特征在于，所述第一电路板设有第一连通孔，所述第一绝缘件可从所述第一连通孔流入所述第一连接件和所述第一电路板之间。
  13. 如权利要求1所述的电池组，其特征在于，所述第一电路板设有第一通孔，沿第三方向，至少部分所述第一通孔的投影位于所述第一通道的投影内，所述第三方向垂直于所述第一方向和第二方向。
  14. 如权利要求1所述的电池组，其特征在于，所述第一连接件设有第三空间，所述第一电路板设于所述第三空间内。
  15. 如权利要求14所述的电池组，其特征在于，所述第一连接件包括第一主体和连接于所述第一主体的第一凸部，所述第一凸部包括多个连接壁，第一主体和多个连接壁形成所述第三空间，沿第三方向，所述第一主体和所述第一电路板相对设置，所述第三方向垂直于所述第一方向和第二方向。
  16. 如权利要求15所述的电池组，其特征在于，沿所述第一方向，所述第一凸部的投影与所述第一电路板的投影有重叠，沿所述第二方向，所述第一凸部的投影与所述第一电路板的投影有重叠。
  17. 如权利要求15所述的电池组，其特征在于，还包括第二绝缘件和连接于所述电芯组件的第一电连接部，所述第一连接件包括设于所述第一主体的第一开口和第二凸部，所述第二凸部设有第二凸部开口，所述第二凸部开口 和所述第一开口连通，所述第一电连接部穿过第一开口和所述第二凸部开口后延伸到第一连接件远离第一电路板的一侧，所述第二绝缘件设于所述第一开口和所述第一电连接部之间的间隙。
  18. 如权利要求1所述的电池组，其特征在于，所述第一连接件靠近所述第一电路板的表面设有第一凸起，所述第一凸起连接所述第一电路板，沿第三方向,所述第一连接件与所述第一电路板之间具有第一间隙，所述第一间隙内设有所述第一绝缘件,所述第三方向同时垂直于所述第一方向和所述第二方向。
  19. 如权利要求1所述的电池组，其特征在于，沿所述第一方向，所述第一通道的长度为6mm-30mm，和/或沿第二方向Y，第一通道的长度为6mm-80mm。
  20. 如权利要求1所述的电池组，其特征在于，所述第一绝缘件通过第一通道将流动的绝缘材料注入电池组固化后形成。
  21. 一种用电设备，其特征在于，包括如权利要求1-20任意一项所述的电池组。
  22. 一种如权利要求1-20任意一项所述的电池组的制造方法，其特征在于，包括以下步骤：
    组装电芯组件、第一电路板和第一连接件，所述电芯组件包括沿第一方向堆叠的第一列电芯和沿第一方向堆叠的第二列电芯，所述第一列电芯和所述第二列电芯沿第二方向间隔设置，所述第一列电芯和所述第二列电芯之间设有第一通道；
    将电芯组件、第一电路板和第一连接件倒立放置，通过所述第一通道由所述电芯组件背离所述第一电路板的一侧内注入流动的绝缘材料，绝缘材料固化后形成第一绝缘件；
    第一绝缘件固化后，将电芯组件、第一电路板和第一连接件设于壳体组件内。
PCT/CN2021/141001 2021-12-23 2021-12-23 电池组、用电设备及制造方法 WO2023115494A1 (zh)

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