CN216958370U - Battery pack and electric device - Google Patents

Abstract

The application discloses group battery and consumer that has group battery, group battery include core subassembly, first circuit board, first connecting piece and first insulating part. The electric core assembly comprises a first row of electric cores stacked along a first direction and a second row of electric cores stacked along the first direction, the first row of electric cores and the second row of electric cores are arranged at intervals along a second direction, a first channel is arranged between the first row of electric cores and the second row of electric cores, and the second direction is perpendicular to the first direction. The first circuit board is connected with the electric core assembly, and the first channel extends to the first circuit board. The first connecting piece is connected with the first circuit board. The first insulating part is used for bonding and connecting the electric core assembly, the first circuit board and the first connecting piece. Through be equipped with first passageway between first row of electric core and second row of electric core, first passageway extends to first circuit board, makes first insulating part with electric core subassembly, first circuit board and first connecting piece adhesive bonding, better fixed electric core.

Description

Battery pack and electric device

Technical Field

The application relates to the technical field of energy storage, in particular to a battery pack and electric equipment.

Background

The battery pack generally includes a plurality of cells and a circuit board, and the cells are connected to the circuit board, and the circuit board may move during use or transportation, which may affect the use of the battery pack.

SUMMERY OF THE UTILITY MODEL

In view of the above, it is desirable to provide a battery pack and an electric device, which can fix a battery cell better.

Embodiments of the present application provide a battery pack including a battery module, a first circuit board, a first connector, and a first insulator. The cell assembly includes a first column of cells stacked in a first direction and a second column of cells stacked in the first direction. The first row of cells and the second row of cells are arranged at intervals along the second direction. A first channel is arranged between the first row of cells and the second row of cells. The second direction is perpendicular to the first direction. The first circuit board is connected with the electric core assembly, and the first channel extends to the first circuit board. The first connecting piece is connected with the first circuit board. The first insulating part is used for bonding and connecting the electric core assembly, the first circuit board and the first connecting piece. Through be equipped with first passageway between first row of electric core and second row of electric core, first passageway extends to first circuit board, makes first insulator pass through first passageway with electric core subassembly, first circuit board and first connecting piece adhesive bonding, better fixed electric core.

Optionally, in some embodiments of the present application, in the second direction, the projection of the first circuit board and the projection of the electric core assembly are overlapped with the projection of the first insulating member, and the first circuit board and the electric core assembly are insulated and fixed by the first insulating member.

Optionally, in some embodiments of the present application, the cell includes a cell casing, an electrode assembly disposed within the cell casing, and an electrode terminal connected to the electrode assembly and leading out of the cell casing. The first insulating piece is bonded on the part, extending out of the battery core shell, of the electrode terminal, and insulates the extending part of the electrode terminal, so that the electrode terminal is fixed.

Optionally, in some embodiments of the present application, a projected portion of the electrode terminal is located within a projection of the first insulating member. The first insulating member covers a portion of the electrode terminal. The electrode terminal can be fixed and insulated, and the heat dissipation can be carried out on the electrode terminal.

Optionally, in some embodiments of the present application, the cell casing includes a first portion and a second portion. The first portion houses an electrode assembly. The second portion is connected to the first portion. The electrode terminal protrudes from the second portion. The first insulator is adhered to at least a portion of the second portion. Further insulate the electrode terminal, further strengthen the fixed of electrode terminal, further promote the heat dissipation to electrode terminal.

Optionally, in some embodiments of the present application, the battery core assembly further includes a second connector, and the first column of batteries includes a plurality of first battery core assemblies. The second column of cells comprises a plurality of second cell groups. The second connecting piece is connected with at least one surface of the first electric core group and the second electric core group arranged along the first direction. The second connecting piece is in contact connection with the battery cell and dissipates heat of the battery cell.

Optionally, in some embodiments of the present application, the second connector comprises a first component comprising a first section and a third section. The first section is arranged between the adjacent first electric core groups. The third section is arranged between the adjacent second electric core groups.

Optionally, in some embodiments of the present application, the first member further includes a second section, the second section is disposed in a gap between the first and second electric core sets along the second direction and connects the first section and the third section, and the second space as a whole can be filled with glue as the first channel.

Optionally, in some embodiments of the present application, the apparatus further includes a third connecting member, the third connecting member is disposed in a gap between the first and second electric core groups along the second direction and is connected to the second section, the second section can divide the second space into a plurality of first channels, and the glue pouring apparatus can pour the flowing insulation material through the plurality of first channels, so as to improve efficiency.

Optionally, in some embodiments of the present application, the electric core assembly further comprises a first structural member. The first structural member includes a first section and a second section. The first segment connects the first components. The first section is positioned between the adjacent first electric core groups. The second section connects the first member. The second section is positioned between the adjacent second electric core groups.

Optionally, in some embodiments of the present application, the first structural member may provide an expansion space for the cell.

Optionally, in some embodiments of the present application, the first structural member comprises foam with a micro closed cell structure, and the insulation material restricting the injection flow is bonded to the first structural member.

Optionally, in some embodiments of the present application, the first structural member further comprises a third segment connecting the first segment and the second segment. The third section is arranged in the gap between the first electric core group and the second electric core group along the second direction. The third section is connected with the second connecting piece.

Optionally, in some embodiments of the present application, the first circuit board is provided with a first through hole. The first insulating member may flow from the first connection hole into between the first connection member and the first circuit board. The first connecting hole can be used for enabling the first insulating part to flow into the first connecting part, and therefore the efficiency of injecting the first insulating part into the battery pack is improved.

Optionally, in some embodiments of the present application, the first circuit board is provided with a first through hole. Along the third direction, at least part of the projection of the first through hole is positioned in the projection of the first channel. The third direction is perpendicular to the first direction and the second direction. The first through hole can be used for allowing the first insulating part to flow into the battery pack, and the efficiency of injecting the first insulating part into the battery pack is improved.

Optionally, in some embodiments of the present application, the first connector is provided with a third space. The first circuit board is arranged in the third space.

Optionally, in some embodiments of the present application, the first connector includes a first body and a first protrusion connected to the first body. The first convex portion includes a plurality of connecting walls. The first body and the plurality of connecting walls form a third space. Along a third direction, the first main body and the first circuit board are oppositely arranged, and the third direction is perpendicular to the first direction and the second direction.

Optionally, in some embodiments of the present application, along the first direction, a projection of the first convex portion overlaps with a projection of the first circuit board. Along the second direction, the projection of the first convex part is overlapped with the projection of the first circuit board.

Alternatively, in some embodiments of the present application, a projection of the first protrusion overlaps a projection of the electrode terminal in the first direction, and the electrode terminal may be insulated.

Optionally, in some embodiments of the present application, along the first direction, a projection of the welding portion is located within a projection of the first convex portion, further enhancing the insulation.

Optionally, in some embodiments of the present application, a second insulating member and a first electrical connection portion connected to the electrical core assembly are further included. The first connecting piece comprises a first opening and a second convex part which are arranged on the first main body. The second protrusion is provided with a second protrusion opening, the second protrusion opening is communicated with the first opening. The first electric connection part penetrates through the first opening and the second convex part opening and then extends to one side, far away from the first circuit board, of the first connecting piece. The second insulating part is arranged in a gap between the first opening and the first electric connecting part, and the first electric connecting part is insulated through the second convex part, so that the risk of short circuit caused when the first electric connecting part is connected with the first circuit board part is reduced.

Optionally, in some embodiments of the present application, the first connector is provided with a first protrusion near a surface of the first circuit board. The first bump is connected with the first circuit board. Along the third direction, a first gap is formed between the first connecting piece and the first circuit board. A first insulating part is arranged in the first gap. The third direction is perpendicular to the first direction and the second direction simultaneously, so that the first insulating part can conveniently flow into the first gap, the first connecting piece and the welding part can be bonded through the first insulating part, and the welding part can be insulated.

Optionally, in some embodiments of the present application, the length of the first channel in the first direction is 6mm to 30mm, and/or the length of the first channel in the second direction is 6mm to 80 mm.

Optionally, in some embodiments of the present application, the first insulating member is formed by injecting a flowing insulating material into the battery pack through the first channel after curing.

An embodiment of the present application further provides an electric device, including the battery pack in any of the above embodiments.

The battery pack and the electric equipment are provided with the first channel between the first row of battery cells and the second row of battery cells, and the first channel extends to the first circuit board, so that the first insulating part is used for bonding and connecting the battery pack assembly, the first circuit board and the first connecting piece through the first channel, and the battery cells are better fixed.

Drawings

Fig. 1 shows a schematic diagram of the structure of a battery pack in some embodiments.

Fig. 2 illustrates an exploded schematic view of a battery pack in some embodiments.

Fig. 3 shows a schematic diagram of the second housing and the second circuit board in some embodiments.

FIG. 4 illustrates a schematic structural view of an electrical core assembly and a first connector in some embodiments.

Fig. 5 shows a cross-sectional view of the battery pack of fig. 1 along II-II.

Fig. 6 shows a partially enlarged view of the battery pack of fig. 5.

Fig. 7 shows a cross-sectional view of a battery pack along II-II in further embodiments.

Fig. 8 shows a partially enlarged view of the battery pack of fig. 7.

Fig. 9 shows a schematic diagram of a structure of a single cell in some embodiments.

Fig. 10 illustrates an exploded view of a single cell in some embodiments.

FIG. 11 illustrates a structural schematic of the electrical core assembly in some embodiments.

Fig. 12 illustrates an exploded view of the battery pack removal housing assembly in some embodiments.

Fig. 13 shows a schematic view of a part of the structure of a battery pack in some embodiments.

Fig. 14 illustrates a schematic of a plurality of second connectors in some embodiments.

Fig. 15 is a schematic diagram of a battery pack portion from another perspective in some embodiments.

Fig. 16 shows a schematic structure of an inverted placement in other embodiments.

FIG. 17 is a schematic diagram of an electrical core assembly according to yet another embodiment.

Fig. 18 shows a schematic view of the structure of the battery pack portion in some embodiments.

Fig. 19 shows a schematic view of a part of the structure of a battery pack in other embodiments.

Fig. 20 shows a schematic diagram of the structure of the electrical core assembly, the first circuit board and the second connector in some embodiments.

Fig. 21 illustrates a schematic diagram of a first circuit board in some embodiments.

Fig. 22 shows a schematic structure of the first circuit board provided with the first conductive sheet and the second conductive sheet in some embodiments.

Fig. 23 illustrates a schematic structure diagram of the first circuit board and the battery cell in some embodiments.

Fig. 24 shows a cross-sectional view along IV-IV of fig. 4.

Fig. 25 shows a schematic structure diagram of the first circuit board and the battery cell at another view angle in some embodiments.

Fig. 26 is a schematic structural diagram illustrating a cell connection first circuit board in some embodiments.

Fig. 27 illustrates a schematic view of a first connector in some embodiments.

Fig. 28 illustrates a schematic diagram of a first connector from another perspective in accordance with some embodiments.

FIG. 29 illustrates a schematic view of a first connector from yet another perspective in accordance with certain embodiments.

Fig. 30 shows a schematic configuration of the battery pack in some embodiments with the first case and the second case removed.

Fig. 31 shows a schematic cross-sectional view of the battery pack of fig. 30 taken along III-III with the first and second housings removed.

Fig. 32 shows a partial 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 case and the second case removed in another embodiment.

Fig. 34 shows a partial enlarged view of the cross-sectional view in fig. 33.

Fig. 35 shows a flow chart of a method of manufacturing a battery pack in some embodiments.

Fig. 36 shows a schematic diagram of the structure of the electric device in some embodiments.

Description of the main element symbols:

battery pack 100

Sampling line bundle 101

Housing assembly 10

First housing 11

First wall 111

Second wall 112

Third wall 113

Fourth wall 114

Fifth wall 115

Second housing 12

Fin 121

Second circuit board 13

Connecting bracket 14

Electrical core assembly 20

First passage 20a

First subchannel 20a-1

Second sub-passage 20a-2

Second space 20b

Battery cell 21

Battery cell casing 211

First portion 211a

Second portion 211b

Electrode terminal 212

Welding part 212a

First terminal 212b

Second terminal 212c

First row 21a

Second row 21b

First electric core group 201, 202, 203

Second electric core groups 204, 205, 206

Second connecting member 22

First part 221

First segment 221a

Second segment 221b

Third segment 221c

First outer surface 201a

Second outer surface 201b

Third outer surface 204a

Fourth outer surface 204b

First side 2211

Second side 2212

Third side 2213

First structural member 23

First segment 231

Second section 232

Third subsection 233

Second structural member 24

Third structural member 25

Fourth structural member 26

Heat conducting member 27

Second part 222

First circuit board 30

Hole 31

First hole 311

Second hole 312

Third hole 313

First conductive sheet 32

Second conductive sheet 33

First communication hole 34

Second communication hole 35

First through hole 36

First connecting member 40

First body 40a

First surface 401

First protrusion 401a

Second surface 402

First gap 403

First convex portion 41

First connecting wall 411

Second connecting wall 412

Third connecting wall 413

Fourth connecting wall 414

Third space 40b

First opening 42

Second convex portion 43

Second protrusion opening 430

Second opening 44

Third convex part 45

Third projection opening 450

Third opening 46

First region 461

Second region 462

Fourth convex part 47

Fourth lobe opening 470

First insulating member 50

Third connecting member 60

First electrical connection 70

First conductive part 71

Fourth segment 71a

Fifth section 71b

First insulating part 72

Second electrical connection 80

Second insulator 90

Power utilization device 200

First direction X

Second direction Y

Third direction Z

The following specific examples will further illustrate the application in conjunction with the above figures.

Detailed Description

The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments.

When an element is referred to as being "on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "or/and" includes any and all combinations of one or more of the associated listed items.

It will be understood that when two elements are arranged in a parallel/perpendicular orientation, there can be an angle between the elements that allows for a tolerance of 0- ± 5%, for example when the elements are arranged in a perpendicular orientation with one element tilted toward or away from the other, the tolerance between the elements being greater than 0 ° and less than or equal to 4.5 °. When the projections of two elements are identical or overlap, a tolerance of 0- ± 10% is allowed between the two elements, for example, where one element is the same shape as the projection of the other element, a tolerance of 0- ± 10% is allowed for the projections.

Some embodiments of the present application will be described in detail below with reference to the accompanying drawings. In the following embodiments, features of the embodiments may be combined with each other without conflict.

Referring to fig. 1 to 8, an embodiment of the present invention provides a battery pack 100 including a housing assembly 10, a battery cell assembly 20, a first circuit board 30 and a first connector 40. An electrical core assembly 20 is disposed within the housing assembly 10. The first circuit board 30 is disposed in the housing assembly 10 and connected to the core assembly 20. The first connector 40 is connected to the first circuit board 30. The battery pack 100 includes a first passage 20a, the first passage 20a is disposed on a side of the battery module assembly 20 facing away from the first connector 40, and the first passage 20a extends to the first circuit board 30.

In one embodiment, the battery pack 100 further includes a first insulating member 50, and the first insulating member 50 is disposed in a gap between the core assembly 20 and the first circuit board 30 and a gap between the first circuit board 30 and the first connecting member 40 through the first passage 20a, thereby improving the efficiency of injecting the first insulating member 50. The electric core assembly 20, the first circuit board 30 and the first connecting member 40 are adhesively connected by the first insulating member 50. The first insulating member 50 may improve protection of the battery pack 100 when the battery pack 100 receives an external impact. Optionally, the first insulating member 50 has a better thermal conductivity, and can dissipate heat of the electric core assembly 20 and the first circuit board 30, which is beneficial to improving heat dissipation of the battery pack 100.

In one embodiment, the first insulating member 50 is formed by injecting a flowing insulating material into the battery pack 100 through the first channel 20a and curing the same. Optionally, the first insulating member 50 includes one of potting adhesive, foam and adhesive. Alternatively, the first insulating member 50 includes a resin, and after the resin is melted by heating, the flowable resin is disposed on the battery pack 100 by pouring and then is cured. Optionally, the first insulating member 50 includes a pouring sealant, and the pouring sealant is formed by curing after being disposed on the battery pack 100 in a pouring manner.

In one embodiment, the housing assembly 10 includes a first housing 11 and a second housing 12, the first housing 11 being coupled 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 and the second wall 112 are disposed opposite to each other, the third wall 113 and the fourth wall 114 are disposed opposite to each other, and the fifth wall 115 is disposed 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, and the fifth wall 115 connects the first wall 111, the second wall 112, the third wall 113, and the fourth wall 114 to form a first space for accommodating at least one of the electric core assembly 20, the first circuit board 30, and the first connector 40. In the present embodiment, the electric core assembly 20, the first circuit board 30 and the first connecting member 40 are all accommodated in the first space. In another embodiment, the electric core assembly 20 and the first circuit board 30 are received in the first space, and a portion of the first connecting member 40 is received in the first space. In other embodiments, the electric core 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.

For better explanation of the structure of the battery pack 100, the structure of the battery pack 100 will be described with reference to X, Y, Z coordinate axes, X, Y, Z coordinate axes are perpendicular to each other, and define an X direction as a first direction, a Y direction as a second direction, and a Z direction as a third direction, wherein the first direction X is a direction in which the first wall 111 and the second wall 112 are disposed opposite to each other, the second direction Y is a direction in which the third wall 113 and the fourth wall 114 are disposed opposite to each other, the third direction Z is a direction in which the fifth wall 115 and the second housing 12 are disposed opposite to each other, and the first direction X is perpendicular to both the second direction Y and the third direction Z.

In one embodiment, the length D1 of the first channel 20a is 6mm to 30mm along the first direction X, which facilitates the pouring device to pour the flowable resin into the first channel 20a and reduces the adhesion of the flowable resin to other structural members, such as the cell assembly 20. Optionally, the length of the first channel 20a along the first direction X is 10mm-20mm, further improving the efficiency of perfusion.

In one embodiment, the length D2 of the first channel 20a is 6mm-80mm along the second direction Y, which facilitates the pouring device to pour the flowing resin into the first channel 20a, and reduces the adhesion of the flowing resin to other structural members, such as the cell assembly 20. Optionally, the length of the first channel 20a along the second direction Y is 10mm-60mm, further improving the efficiency of perfusion.

In one embodiment, the electric core assembly 20, the first circuit board 30 and the first connector 40 are disposed in the first housing 11, and the electric core assembly 20 and the first connector 40 are connected to the first housing 11. The cell assembly 20, the first circuit board 30 and the first connector 40 are placed upside down, the cell assembly 20, the first circuit board 30 and the first connector 40 are sequentially disposed, and the flowing resin or potting adhesive is injected into the battery pack 100 through the first passage 20 a. Alternatively, the electrical core assembly 20, the first circuit board 30 and the first connecting member 40 are sequentially disposed along the third direction Z after the inversion. Optionally, a flowing resin or pouring sealant is injected into the battery pack 100 from the bottom of the electric core assembly 20 along the third direction Z. Alternatively, when the electric core 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 fourth wall 114 may be installed first, and then the flowing insulating material may be poured in an inverted position, and the fifth wall 115 may be installed after the pouring of the glue is completed. Further, the fifth wall 115 is installed after the first insulating member 50 is cured. Alternatively, the electric core assembly 20, the first circuit board 30 and the first connecting member 40 are placed upside down and poured with the flowable insulation material to form the first insulation member 50, and then the first housing 11 and the second housing 12 are mounted.

In one embodiment, 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. Alternatively, the second circuit board 13 may be a circuit board with a battery management system, so as to intelligently manage and maintain each battery unit, reduce overcharge and overdischarge of the battery, prolong the service life of the battery, and monitor the state of the battery.

In one embodiment, the battery pack 100 further includes a connection bracket 14, and the first case 11 and the second case 12 are connected to the connection bracket 14. The connection bracket 14 is provided between the second circuit board 13 and the first connector 40, and the risk of short circuit between the second circuit board 13 and the first connector 40 can be reduced. Optionally, the connecting bracket 14 is made of an insulating material.

In one embodiment, the first housing 11 and the second housing 12 comprise a thermally conductive material, which can improve heat dissipation performance. Alternatively, 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. Alternatively, the metal heat conductive material of the first and second housings 11 and 12 includes aluminum. Optionally, fins 121 are disposed on an outer wall of the second casing 12, and the fins 121 are arranged along the second direction Y and connected to the second casing 12, so as to further improve heat dissipation performance.

Referring to fig. 8, 9 and 10, in an embodiment, the battery cell assembly 20 includes a plurality of battery cells 21, and the plurality of battery cells 21 are stacked along the first direction X. Each of the battery cells 21 includes a cell casing 211, an electrode assembly 213 provided in the cell casing 211, and an electrode terminal 212 connected to the electrode assembly 213 and led out from the cell casing 211. In one embodiment, the cell housing 211 includes a first portion 211a and a second portion 211b, the first portion 211a accommodating the electrode assembly 213, the second portion 211b connecting the first portion 211a, and the electrode terminal 212 protruding from the second portion 211 b. Optionally, a 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 a portion of the cell assembly 20. Optionally, the first insulating member 50 is adhered to the electrode terminal 212, and a projection of the electrode terminal 212 overlaps a projection of the first insulating member 50 along the second direction Y. Alternatively, 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 portion of the electrode terminal 212, so that the electrode terminal 212 can be fixed and insulated, and the heat of the electrode terminal 212 can be dissipated. Alternatively, the projection of the electrode terminal 212 protruding the second portion 211b is located within the projection of the first insulating member 50. Optionally, the first insulating member 50 adheres to a portion of the electrode terminal 212 extending out of the second portion 211b, and insulates a portion of the electrode terminal 212 extending out of the second portion 211b, so as to strengthen fixation of the electrode terminal 212 and improve heat dissipation of the electrode terminal 212. For example, the first insulating member 50 is adhered to the entire structure in which the electrode terminal 212 protrudes from the second portion 211b, or the first insulating member 50 is adhered to the structure in which the electrode terminal 212 protrudes from the second portion 211 b. Optionally, the projection of the second portion 211b overlaps the projection of the first insulating member 50, and the first insulating member 50 is bonded to at least a portion of the second portion 211b to further insulate the electrode terminal 212, so as to further enhance the fixation of the electrode terminal 212 and further improve the heat dissipation of the electrode terminal 212.

In an embodiment, the cell casing 211 includes a first casing 2111 and a second casing 2112, and the first casing 2111 is connected to the second casing 2112. The first and second housings 2111 and 2112 may be folded along the connection position such that the first and second housings 2111 and 2112 are overlapped to form a first portion 211a to enclose the electrode assembly 213. The first casing 2111 has a circumferential side extending outward to form a plurality of first extension portions 2113, and the second casing 2112 has a circumferential side extending outward to form a plurality of second extension portions 2114. After the first and second housings 2111, 2112 are folded along the connection location, the first and second extensions 2113, 2114 overlap and sealingly connect to form a second portion 211 b. The second portion 211b includes a first sealing portion 2115 and a second sealing portion 2116, the first sealing portion 2115 is disposed opposite to the connection position, and the electrode terminal 212 protrudes from the first sealing portion 2115 out of the first portion 211 a. Optionally, the second portion 211b includes two second sealing portions 2116, and the two second sealing portions 2116 are oppositely disposed along the second direction Y. Optionally, the second portion 211b includes a first sealing portion 2115, the cell 21 includes two electrode terminals 212, and the two electrode terminals 212 extend out of the cell housing 211 from the first sealing portion 2115. In other embodiments, the first housing 2111 and the second housing 2112 are separated from each other, the second portion 211b includes two first sealing portions 2115, the two first sealing portions 2115 are oppositely disposed along the third direction Z, the cell 21 includes two electrode terminals 212, one of the electrode terminals 212 extends out of the cell housing 211 from one of the first sealing portions 2115, the other electrode terminal 212 extends out of the cell housing 211 from the other first sealing portion 2115, and the two electrode terminals 212 are oppositely disposed along the third direction Z.

In one embodiment, the electrode assembly 213 includes a winding type structure formed by winding the positive electrode tab, the negative electrode tab, and the separator. In other embodiments, the electrode assembly 213 may also have a lamination structure in which a positive electrode tab, a separator, and a negative electrode tab are sequentially laminated to form one electrode assembly 213 unit, and a plurality of electrode assembly 213 units are further laminated to form the electrode assembly 213. Optionally, the cell casing 211 includes an aluminum plastic film. Optionally, the battery cell 21 includes a soft package battery cell.

In one embodiment, the cell 21 is contact connected to the first housing 11, and the heat of the cell 21 is dissipated to the external environment through the first housing 11.

In one embodiment, the electrode terminal 212 has a welding portion 212a extending out of the cell casing 211, and the welding portion 212a is formed by bending the electrode terminal 212. The electrode terminals 212 of the adjacent battery cells 21 are bent toward each other and connected to the first circuit board 30. In one embodiment, the electrode terminals 212 include a first terminal 212b and a second terminal 212c, the first and second terminals 212b and 212c having opposite polarities, and one of the first and second terminals 212b and 212c is a positive terminal and the other is a negative terminal. In the third direction Z, a projection of the welding portion 212a of the first terminal 212b of the cell 21 at least partially overlaps a 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 the adjacent cells are bent toward 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, so that the series connection between the cells 21 is realized. By providing the welding portions 212a of the adjacent cells 21 to be connected to each other and connecting the welding portions 212a to the first circuit board 30, the number of processing steps is reduced.

In other embodiments, along the third direction Z, the projection of the first terminal 212b of a battery cell 21 may at least partially overlap with the projection of the first terminal 212b of an adjacent battery cell 21, and the battery cells 21 are connected by the first circuit board 30 to realize parallel connection between the battery cells 21.

Referring to fig. 11, in an embodiment, the cell assembly 20 includes a plurality of cells 21 stacked along the first direction X, wherein a portion of the cells 21 are stacked along the first direction X and arranged in a first row 21a, a portion of the cells 21 are stacked along the first direction X and arranged in a second row 21b, and the first row 21a and the second row 21b are arranged at intervals along the second direction Y. The first and second rows 21a, 21b have a second space 20b therebetween. Alternatively, the first passage 20a is provided in the second space 20 b. Alternatively, the second space 20b is used as the first passage 20 a. Optionally, when the specifications of the first column 21a and the second column 21b are upgraded, the length of the second space 20b in the second direction Y is reduced, so that the upgraded first column 21a and second column 21b occupy part of the second space 20b, which is convenient for increasing the capacity of the battery cell 21. Optionally, the first column 21a includes a battery cell 21a-1, the second column 21b includes a battery cell 21b-1, and the battery cells 21a-1 and 21b-1 are arranged at intervals along the second direction Y, and a gap between the battery cells 21a-1 and 21b-1 is used as the first sub-channel 20 a-1. Optionally, the first row 21a includes a cell 21a-2, the second row 21b includes a cell 21b-2, the cell 21a-1 and the cell 21a-2 are sequentially disposed along a first direction X, the cell 21b-1 and the cell 21b-2 are sequentially disposed along the first direction X, the cell 21a-2 and the cell 21b-2 are arranged at intervals along a second direction Y, and a gap between the cell 21a-2 and the cell 21b-2 is used as the second sub-channel 20 a-2. Optionally, the first sub-channel 20a-1 and the second sub-channel 20a-2 may be individually used as the first channel 20a for glue filling. Optionally, the first sub-channel 20a-1 is communicated with the second sub-channel 20a-2, and is used as the first channel 20a for glue filling.

In an embodiment, the first column 21a may further include at least the battery cell 21a-3, the battery cell 21a-4, the battery cell 21a-5, the battery cell 21a-6 and the battery cell 21a-7 arranged in sequence along the first direction X, and two battery cells arranged adjacently in sequence along the first direction X in the first column 21a are used as the first battery pack, for example, the battery cell 21a-1 and the battery cell 21a-2 are used as the first battery pack 201, the battery cell 21a-3 and the battery cell 21a-4 are used as the first battery pack 202, and the battery cell 21a-5 and the battery cell 21a-6 are used as the first battery pack 203. Optionally, the second column 21b may further include at least a battery cell 21b-3, a battery cell 21b-4, a battery cell 21b-5, a battery cell 21b-6, and a battery cell 21b-7, which are sequentially arranged along the first direction X. Two cells in the second row 21b that are sequentially and adjacently arranged along the first direction X are taken as a second cell group, for example, the cell 21b-1 and the cell 21b-2 are taken as the second cell group 204, the cell 21b-3 and the cell 21b-4 are taken as the second cell group 205, and the cell 21b-5 and the cell 21b-6 are taken as the second cell group 206. The first electric core group 201 and the second electric core group 204 are arranged at intervals along the second direction Y, and the gap between the first electric core group 201 and the second electric core group 204 is used as the first channel 20 a. The first electric core groups 202 and the second electric core groups 205 are arranged at intervals along the second direction Y, and the gap between the first electric core groups 202 and the second electric core groups 205 is used as another first passage 20 a. The first and second electric core groups 203 and 206 are arranged at intervals in the second direction Y with a gap between the first and second electric core groups 203 and 206 as another first passage 20 a. The plurality of first passages 20a are arranged in a line in the first direction X. In other embodiments, the first electric core group may also be composed of more than two electric cores 21, and the second electric core group may also be composed of more than two electric cores 21, for example, the first electric core group is composed of three electric cores 21, and the second electric core group is composed of three electric cores 21.

Alternatively, the first set of electric cores may be composed of one electric core 21, and the second set of electric cores may be composed of one electric core 21, for example, in fig. 12, the first set of electric cores may be composed of electric cores 21a-7, and the second set of electric cores may be composed of electric cores 21 b-7. Optionally, a part of the first electric core group is composed of one electric core 21, a part of the first electric core group is composed of more than one electric core 21, a part of the second electric core group is composed of one electric core 21, and a part of the second electric core group is composed of more than one electric core 21.

Referring to fig. 11 to 15, in an embodiment, the electric core assembly 20 further includes a plurality of second connecting members 22, and the second connecting members 22 are disposed between the adjacent first electric core sets and between the adjacent second electric core sets. Optionally, the second connecting member 22 is connected to the battery cell 21 in a contact manner, so as to dissipate heat of the battery cell 21. Optionally, the second connecting member 22 is in contact connection with the first casing 11, and transfers heat of the battery cell 21 to the first casing 11, so as to dissipate heat of the battery cell 21 through the first casing 11.

In one embodiment, the second connector 22 includes a first part 221. Optionally, the first part 221 includes a first section 221a, a second section 221b and a third section 221c arranged along the second direction Y. The first segment 221a is connected to the outer surface of the first electric core groups arranged along the first direction X, and the first segment 221a is arranged between the adjacent first electric core groups as viewed along the third direction Z. Along the first direction X, a projection of the first section 221a is located within a projection of the cell housing 211 of the first cell group. When viewed along the third direction Z, 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 channels 20a, and the glue filling device can inject the flowing insulating material through the plurality of first channels 20a, thereby improving the efficiency. The third section 221c is connected to the outer surface of the second core pack disposed along the first direction X. The third section 221c is disposed between the adjacent second electric core groups as viewed in the third direction Z. Along the first direction X, a projection of the third section 221c is located within a projection of the cell housing 211 of the second cell group. The first segment 221a dissipates heat from the first electric core assembly, the third segment 221c dissipates heat from the second electric core assembly, and the second segment 221b connects the first segment 221a and the third segment 221c, thereby increasing the heat dissipation area and the strength of the second connecting member 22. The first electric core set 201 includes a first outer surface 201a and a second outer surface 201b arranged in the first direction X, and the second electric core set 204 includes a third outer surface 204a and a fourth outer surface 204b arranged in the first direction X. The second outer surface 201b is connected to the first section 221a, and can dissipate heat from the battery cell 21a-2 and the battery cell 21 a-3. The third section 221c is connected to the fourth outer surface 204b, and can dissipate heat of the battery cell 21b-2 and the battery cell 21 b-3. The second section 221b is disposed in the second space 20b, so as to increase the heat dissipation area and further improve the heat dissipation. The adjacent two second sections 221b and the opposite sides of the first electric core group 201 and the second electric core group 204 form a first channel 20a, which facilitates the flowing resin or pouring sealant to be injected into the battery pack 100 from the bottom of the electric core 21 along the third direction Z to form the first insulating member 50.

In one embodiment, the electric core assembly 20 further comprises a first structure 23, and the first structure 23 is connected to the first part 221. Along the first direction X, a projection of the first structure 23 is located within a projection of the first part 221. Optionally, the first structure 23 includes a first segment 231 and a second segment 232, the first segment 231 is disposed to connect the first parts 221, the first segment 231 is located between the adjacent first electric core groups, the second segment 232 is connected to the first parts 221, and the second segment 232 is located between the adjacent second electric core groups. Optionally, the first structural member 23 includes an elastic element, and when the battery cell 21 expands, the first structural member 23 may be compressed to provide an expansion space for the battery cell 21, and optionally, the first structural member 23 includes foam. Optionally, the first structural member 23 is bonded to the second connecting member 22.

In an embodiment, the first structural member 23 further includes a third section 233 connecting the first section 231 and the second section 232, the third section 233 being located in the second space 20b, the third section 233 being connected to the second section 221 b. Optionally, the first structural element 23 comprises foam with a micro closed cell structure, and the insulation material limiting the injected flow is bonded to the first structural element 23.

In some embodiments, two second connecting members 22 are disposed between adjacent first battery cell groups, one second connecting member 22 is connected to one of the first battery cell groups, the other second connecting member 22 is connected to the other first battery cell group, and the first structural member 23 is disposed between the two second connecting members 22, so as to facilitate heat dissipation of the battery cells 21. The first segment 231 is located between two first segments 221a, the second segment 232 is located between two third segments 221c, and the third segment 233 is located between two second segments 221 b. One of the first segments 221a is connected to one of the first groups of cells, the other first segment 221a is connected to the other first group of cells, one of the third segments 221c is connected to the second group of cells, and the other third segment 221c is connected to the other second group of cells.

Referring to fig. 12, in an embodiment, the first part 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 cell pack arranged along the first direction X, and along the first direction X, a projection of the first section 221a is located in a projection of the cell housing 211 of the first cell pack. The third section 221c is connected to the outer surface of the second core pack disposed along the first direction X. Along the first direction X, a projection of the third section 221c is located within a projection of the cell housing 211 of the second cell group. Along the first direction X, the projection of the first part 221 is separated from the projection of the second space 20b, and the first section 221a and the third section 221c are not disposed in the second space 20b, so that the second space 20b can be entirely used as the first channel 20a for glue filling, and the glue filling efficiency is improved.

Optionally, the first part 221 is disposed between adjacent cells. Further, the first section 221a is disposed between adjacent cells in the first row of cells 21a, and the third section 221c is disposed between adjacent cells in the second row of cells 21 b. Taking the first cell assembly 201 as an example, a first section 221a is connected to the first outer surface 201a, a first section 221a is connected to the second outer surface 201b, and another first section 221a is located between the cell 21a-1 and the cell 21a-2 and is connected to the surfaces of the cell 21a-1 and the cell 21a-2, so that the area of the first part 221 contacting the cell can be increased, and the heat dissipation effect can be improved.

Referring to fig. 13, optionally, the cell assembly 20 further includes a second structural member 24, and the second structural member 24 is disposed between the adjacent cells 21. Optionally, the second structural member 24 is disposed between adjacent cells of the first cell group. Optionally, the second structural member 24 is disposed between adjacent cells of the second cell group. Along the first direction X, the projection of the second structural member 24 is located within the projection of the cell housing 211. Optionally, the second structural member 24 includes an elastic member, and when the battery cell 21 expands, the second structural member 24 may be compressed to provide an expansion space for the battery cell 21, and optionally, the second structural member 24 includes foam.

Referring to fig. 13, optionally, 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. Optionally, the third structural member 25 includes an adhesive member, and the first member 221 may be adhered to the cell casing 211. Optionally, the third structural member 25 includes an elastic member, and when the battery cell 21 is expanded, the third structural member 25 may be compressed to provide an expansion space for the battery cell 21, and optionally, the third structural member 25 includes foam. Optionally, an adhesive is disposed on the surface of the foam connecting the first member 221 and the cell housing 211.

Referring to fig. 12, optionally, 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 along the first direction X, and the cell assembly 20 can be adhered to the first wall 111 and the second wall 112. Optionally, the fourth structural member 26 comprises an insulating material. Optionally, the thermal conductivity of the fourth structural member 26 is smaller than that of the second connecting member 22, and the fourth structural member 26 may limit the heat of the cell assembly 20 from being transferred to the first wall 111 and the second wall 112 through the fourth structural member 26, so as to reduce the temperature difference between the cells 21.

In some embodiments, the battery pack 100 further includes a heat conducting member 27, the fourth structural member 26 is located between the heat conducting member 27 and the first wall 111, and the heat conducting member 27 is connected to the battery cell 21, so as to facilitate heat dissipation of the battery cell 21. Alternatively, the heat-conducting member 27 and the second connecting member 22 have the same structure. Optionally, the thermal conductivity of the thermal conductive member 27 is smaller than that of the second connecting member 22, so as to reduce the temperature difference between the battery cells 21.

In one embodiment, the second connector 22 further comprises a second member 222, the second member 222 connecting the sides of the first member 221. The second member 222 extends from between the adjacent battery cells 21 and is bent toward the battery cells 21, so that the second member 222 is connected to the cell casing 211. Optionally, the second member 222 is contact-connected to the cell housing 211. Optionally, the second component 222 is connected to the cell housing 211 through another structural member, such as a thermal pad or a thermal paste. Along the second direction Y, a projection of the second part 222 at least partially overlaps a projection of the battery cell 21. The cell shell 211 is connected through the contact of the second part 222, the contact area between the second connecting piece 22 and the cell shell 211 is increased, heat is conducted to the second part 222 through the cell shell 211, and then conducted to the first shell 11 through the second part 222, so that the heat dissipation effect on the cell 21 is improved.

In one embodiment, along the second direction Y, the first member 221 includes a first side 2211 and a second side 2212, and the second member 222 connects the first side 2211 and the second side 2212. Along the second direction Y, a projection of the second part 222 is located within a projection of the cell housing 211. The first member 221 further 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 members 222, and the two second members 222 are separately connected to the third side 2213. Along the third direction Z, the projection of the second component 222 is located in the projection of the cell housing 211, and the projection of the second component 222 is separated from the projection of the second space 20b, so that the second component 222 is separated from the third side 2213, the shielding of the first channel 20a can be reduced, and the glue filling is facilitated.

In one embodiment, the first member 221 and the second member 222 are integrally formed by bending to increase the structural strength of the second connector 22. Optionally, the second connector 22 is an aluminum shell.

Referring to fig. 17, 18, 19 and 20, in an embodiment, the battery pack 100 further includes a third connecting member 60, and the third connecting member 60 is disposed in the second space 20b and connected to the second connecting member 22. Optionally, the third connector 60 is spaced from the second seal 2116. Optionally, the third connector 60 is connected in contact with the second seal portion 2116. The third connecting member 60 extends continuously in the third direction Z. Along the second direction Y, the projection of the third connection 60 is located within the projection of the first portion 211a and the second portion 211 b. Optionally, the third connecting member 60 is disposed in the gap between the first cell group and the second cell group along the second direction Y, and the third connecting member 60 is connected to the second section 221b and disposed close to the first cell group, so as to improve the structural strength of the cell assembly 20. The gap between the third connecting piece 60 and the second electric core group is used as the first channel 20a for glue filling. Optionally, the third connecting member 60 is disposed in the gap between the first cell group and the second cell group along the second direction Y, and the third connecting member 60 is connected to the second section 221b and disposed close to the second cell group, so as to improve the structural strength of the cell assembly 20. The gap between the third connecting piece 60 and the first electric core group is used as a first channel 20a for glue filling. Optionally, a third connecting member 60 is disposed between the first cell assembly and the second cell assembly along the gap in the second direction Y, one third connecting member 60 is connected to the second section 221b and disposed close to the first cell assembly, and the other third connecting member 60 is connected to the second section 221b and disposed close to the second cell assembly, so as to further improve the structural strength of the cell assembly 20. The gap between the two third connectors 60 is used as the first channel 20a for glue filling. Alternatively, the specifications of the cells in the first row 21a and the second row 21b may be upgraded by reducing the length of the third connecting member 60 in the second direction Y, so as to facilitate increasing the capacity of the cell 21. Optionally, the third connecting member 60 comprises an elastic member, the third connecting member 60 can be compressed to provide a buffer for the electric core assembly 20, and optionally, the third connecting member 60 comprises foam.

Referring to fig. 21, 22, 23 and 24, the first circuit board 30 is provided with a plurality of sets of holes 31, and each set 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 in 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, and the soldering portion 212a of the first terminal 212b and the soldering portion 212a of the second terminal 212c are stacked on each other to be connected to the first circuit board 30.

Optionally, 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 an adjacent cell 21 passes through the first hole 311, the second terminal 212c of another cell 21 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 and then welded to the first conductive sheets 32. Welding includes laser welding, ultrasonic welding, and the like. In other embodiments, the soldering portion 212a and the first conductive sheet 32 may be connected by other connection methods such as conductive adhesive.

Optionally, each set of holes 31 further comprises a third hole 313, the third hole 313 being located between the first hole 311 and the second hole 312, viewed in the third direction Z. The projection of the third hole 313 overlaps the projection of the first conductive sheet 32 in the third direction Z. Optionally, the projection of the third aperture 313 lies within the projection of the first conductive sheet 32 in the third direction Z. By providing the third hole 313, the first insulating member 50 can be facilitated to flow from the third hole 313 into the first connecting member 40.

In one embodiment, 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 in the second direction Y, and is used for transmitting current from the first column 21a to the second column 21b, so as to realize series connection or parallel connection between the first column 21a and the second column 21 b. Optionally, the thickness of the second conductive sheet 33 is greater than the thickness of the first conductive sheet 32 along the third direction Z. By increasing the thickness of the second conductive sheet 33, the transmission of current can be increased.

In an embodiment, the first circuit board 30 is further provided with a plurality of first through holes 34, and the first through holes 34 penetrate through the first circuit board 30 along the third direction Z. Some of the first through holes 34 are arranged in the second direction Y, and some of the first through holes 34 are arranged in the first direction X. The first through-hole 34 allows the first insulating member 50 to flow into the first connecting member 40, thereby improving the efficiency of injecting the first insulating member 50 into the battery pack 100.

In one embodiment, 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, and the plurality of second communication holes 35 are arranged at the middle position of the first circuit board 30. The battery pack 100 further includes a sampling harness 101, and the sampling harness 101 is connected to the first circuit board 30 through the plurality of second communication holes 35.

Referring to fig. 25 and 26, in an embodiment, the first circuit board 30 is further provided with a plurality of first through holes 36, and optionally, the first through holes 36 are disposed at one side of the second through holes 35 along the second direction Y, and the first through holes 36 allow the first insulating member 50 to flow into the battery pack 100, so as to improve the efficiency of injecting the first insulating member 50 into the battery pack 100. Optionally, the aperture 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. Alternatively, the first circuit board 30 is provided with two rows of the first through holes 36, and the two rows of the first through holes 36 are provided on both sides of the second communication hole 35 in the second direction Y.

In an embodiment, the first through hole 36 is located in the second space 20b as viewed in the third direction Z. Optionally, along the third direction Z, at least a 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 further improve the efficiency of injecting the first insulating member 50 into the battery pack 100 by flowing between the first circuit board 30 and the first connecting member 40 from the first through hole 36.

In one embodiment, the battery pack 100 further includes a first electrical connection 70 and a second electrical connection 80. Optionally, the first electrical connection portion 70 and the second electrical connection portion 80 are soldered to the first circuit board 30. The first electrical connection portion 70 connects one of the first terminal 212b and the second terminal 212c, and the second electrical connection portion 80 connects the other. The first electrical connection portion 70 and the second electrical connection portion 80 are connected to the second circuit board 13, and the energy of the battery cell 21 is transmitted to the external use device through the first electrical connection portion 70 and the second electrical connection portion 80. Optionally, the first and second electrical connections 70, 80 comprise copper bars.

In one embodiment, the first electrical connection 70 includes a first conductive portion 71 and a first insulating portion 72. The first insulating portion 72 covers a portion of the first conductive portion 71, and two ends of the first conductive portion 71 protrude from the first insulating portion 72, wherein one end of the first conductive portion 71 is connected to the first circuit board 30 and one of the first terminal 212b and the second terminal 212c, and the other end is connected to the second circuit board 13. Optionally, the first conductive portion 71 includes a fourth segment 71a and a fifth segment 71b, the fourth segment 71a is disposed along the third direction Z, and the fifth segment 71b is disposed along a direction opposite to the first direction X. Alternatively, the fifth segment 71b may be a flexible structure. Optionally, the fifth section 71b comprises a plurality of individual pieces of soft copper bars arranged one above the other.

In one embodiment, the structure of the second electrical connection portion 80 is the same as that of the first electrical connection portion 70, except that the first conductive portion 71 extends in a direction opposite to the second direction Y in connection with one end of the first circuit board 30, and the second electrical connection portion 80 extends in the second direction in connection with one end of the first circuit board 30.

When the first housing 11 and the second housing 12 are assembled, the first electrical connection portion 70 and the second circuit board 13 are assembled, specifically, the fifth section 71b is bent to substantially the third direction Z, then the fifth section 71b is connected to the second circuit board 13, the second housing 12 is connected to the first housing 11, the fifth section 71b is driven to be bent from the third direction Z to substantially the direction opposite to the first direction X in the process that the second housing 12 is covered on the first housing 11, and then the first housing 11 and the second housing 12 are assembled. It can be understood that the state of the first electrical connection portion 70 after the first housing 11 and the second housing 12 are assembled is the initial state of the first electrical connection portion 70, the length of the first electrical connection portion 70 can be reduced, and thus the length of the energy loop can be reduced, and the weight of the first electrical connection portion 70 can be reduced.

Referring to fig. 27 to 34, the first connecting member 40 has insulation. Alternatively, the first connection member 40 is made of an insulating material. Alternatively, the first connecting member 40 is made of a metal material and an insulating material, and the insulating material may cover an outer surface of the metal material.

In one embodiment, the first connector 40 includes a first body 40a, and the first body 40a 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 protrusion 41, and the first protrusion 41 is provided at an edge of the first body 40 a. The first convex portion 41 includes a first connection wall 411, a second connection wall 412, a third connection wall 413, and a fourth connection wall 414, the first connection wall 411 and the second connection wall 412 connect the edge of the first body 40a along the first direction X, the third connection wall 413 and the fourth connection wall 414 connect the edge of the first body 40a along the second direction Y, the first connection wall 411, the second connection wall 412, the third connection wall 413, the fourth connection wall 414, and the first body 40a cooperate to form a third space 40b, and the first circuit board 30 is disposed in the third space 40 b. Optionally, along the first direction X or the second direction Y, the projection of the first protrusion 41 overlaps with the projection of the first circuit board 30, and the position of the first circuit board 30 is limited by the first protrusion 41, which is convenient for assembly. Alternatively, along the first direction X or the second direction Y, the projection of the first circuit board 30 is located within the projection of the first convex portion 41. Alternatively, the projection of the first protrusion 41 overlaps the projection of the electrode terminal 212 in the first direction X or the second direction Y, and the electrode terminal 212 may be insulated. Optionally, the projection of the welding portion 212a is located in the projection of the first protrusion 41 along the first direction X or the second direction Y, so as to further enhance the insulation. Alternatively, along the first direction X or the second direction Y, the projection of the first insulating member 50 is located within the projection of the first protrusion 41. Optionally, 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, so that the first connecting element 40 can be adhered to the first housing 11 to fix the first connecting element 40. Further, the first connecting wall 411 is adhered to the first wall 111, the second connecting wall 412 is adhered to the second wall 112, the third connecting wall 413 is adhered to the third wall 113, and the fourth connecting wall 414 is adhered to the fourth wall 114. Optionally, the adhesive comprises a thermally conductive glue.

The first connecting member 40 is provided with a first opening 42, and the first opening 42 penetrates through the surface of the first body 40a along the third direction Z. The first electrical connection portion 70 extends through the first opening 42 to a side of the first connection member 40 away from the first circuit board 30. Optionally, the first connector 40 is provided with a second protrusion 43, the second protrusion 43 is provided at an edge of the first opening 42, the second protrusion 43 limits a position of the first electrical connection portion 70, the second protrusion 43 is provided with a second protrusion opening 430, the second protrusion opening 430 is communicated with the first opening 42, and the first electrical connection portion 70 extends to a side of the first connector 40 away from the first circuit board 30 after passing through the first opening 42 and the second protrusion opening 430. Along the first direction X, 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 second convex portion 43 insulates the first conductive portion 71, thereby reducing the risk of short circuit at the portion where the first conductive portion 71 is connected to the first circuit board 30. Optionally, the first insulating portion 72 is located in the space formed by the second protruding portion 43, so as to increase the length of the second protruding portion 43 along the third direction Z, and further improve the insulation of the portion of the first conductive portion 71 connected to the first circuit board 30.

In one embodiment, the first body 40a is provided with a second opening 44, and the second electrical connection 80 passes through the second opening 44. Optionally, the first connecting member 40 is provided with a third protrusion 45, and the third protrusion 45 is provided at the edge of the second opening 44. The third protrusion 45 limits the position of the second electrical connection portion 80, the third protrusion 45 is provided with a third protrusion opening 450, the third protrusion opening 450 is communicated with the second opening 44, and the second electrical connection portion 80 passes through the second opening 44 and the third protrusion opening 450 and then extends to the side of the first connector 40 away from the first circuit board 30. Along the first direction X, 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 projection 45. The second electrical connection portion 80 is insulated by the third protrusion 45, so that the risk of short circuit of the portion of the second electrical connection portion 80 connected with the first circuit board 30 is reduced.

In one embodiment, the first body 40a is provided with a third opening 46, the third opening 46 penetrates through the surface of the first body 40a, and the sampling beam 101 passes through the third opening 46. The first connecting member 40 is provided with a fourth convex portion 47, the fourth convex portion 47 is arranged at the edge of the third opening 46, the fourth convex portion 47 limits the position of the sampling wire harness 101, the fourth convex portion 47 is provided with a fourth convex portion opening 470, the fourth convex portion opening 470 is communicated with the third opening 46, and the sampling wire harness 101 passes through the third opening 46 and the fourth convex portion opening 470 and then extends to the side, away from the first circuit board 30, of the first connecting member 40. Along the first direction X, the projection of the portion of the sampling harness 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, and the risk of short circuit of the part of the sampling wire harness 101 connected with the first circuit board 30 is reduced.

In one embodiment, the battery pack 100 further includes a second insulating member 90, and the second insulating member 90 is coupled to the first coupling member 40. After the first electrical connection 70 passes through the first opening 42 and the second tab opening 430, the second electrical connection 80 passes through the second opening 44 and the third tab opening 450, and the sampling harness 101 passes through the third opening 46 and the fourth tab opening 470, second insulator 90 is disposed in first opening 42 from second lobe opening 430, in second opening 44 from third lobe opening 450 and in third opening 46 from fourth lobe opening 470, the first electrical connection 70 may be secured in the first opening 42 and the second tab opening 430, the second electrical connection 80 may be secured in the second opening 44 and the third tab opening 450, and the sampling harness 101 may be secured in the third opening 46 and the fourth tab opening 470, the first insulating member 50 can be prevented from flowing out of the opening of the first connecting member 40 when the first opening 42, the second opening 44 and the third opening 46 are closed and the first housing 11 is inverted for potting. Optionally, a second insulating member 90 is provided in the gap between the first opening 42 and the first electrical connection portion 70. Optionally, the second insulating member 90 includes resin, and after the resin is heated and melted, the second insulating member 90 is fixed to the opening of the first connecting member 40 by pouring. Optionally, the second insulator 90 comprises a quick-drying adhesive. Alternatively, the portion 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 connector 40, and the first circuit board 30 and the first connector 40 may be bonded.

Optionally, the third opening 46 includes a first region 461 and a second region 462, and a width of the first region 461 is greater than a width of the second region 462 along the second direction Y. The second area 462 is used for passing elements on the sampling line beam 101, and the first area 461 is used for passing the lines of the sampling line beam 101. By reducing the width of the second region 462, the amount of the second insulating member 90 used can be reduced.

In one embodiment, the first body 40a includes a first surface 401 and a second surface 402 disposed along the third direction Z, the first surface 401 being away from the first circuit board 30, and the second surface 402 being close to the first circuit board 30. The first surface 401 is provided with first protrusions 401a, and the first protrusions 401a are formed by the second surface 402 being recessed toward the first surface 401 in a direction opposite to the third direction Z. Alternatively, the first protrusion 401a extends along the second direction Y, which may improve the structural strength of the first body 40 a. Optionally, the first protrusions 401a are disposed in a plurality, and the plurality of first protrusions 401a are arranged in the first direction X, so as to further improve the structural strength of the first body 40 a. Alternatively, the first protrusion 401a is connected to the first circuit board 30 and located between the adjacent first conductive sheets 32. The height of the first protrusion 401a in the third direction Z is greater than the sum of the thickness of the first conductive sheet 32 and the thickness of the soldering portion 212a connected to the first conductive sheet 32, the first body 40a is supported by the first protrusion 401a, a first gap 403 is formed between the first surface 401 and the soldering portion 212a, the first insulating member 50 is disposed in the first gap 403, the first insulating member 50 flows into the first gap 403, the first connecting member 40 and the soldering portion 212a can be bonded by the first insulating member 50, and the soldering portion 212a can be further insulated.

Referring to fig. 35, the present application further provides a method for manufacturing the battery pack 100, which includes the following steps:

step 1, assembling an electric core assembly 20, a first circuit board 30 and a first connecting piece 40, wherein the electric core assembly comprises a first row of electric cores stacked along a first direction and a second row of electric cores stacked along the first direction, the first row of electric cores and the second row of electric cores are arranged at intervals along a second direction, and a first channel is arranged between the first row of electric cores and the second row of electric cores;

step 2, placing the electric core assembly 20, the first circuit board 30 and the first connecting piece 40 upside down, injecting a flowing insulating material into one side of the electric core assembly, which is far away from the first circuit board, through a first passage, and curing the insulating material to form a first insulating piece 50;

and 3, after the first insulating part 50 is cured, arranging the electric core assembly 20, the first circuit board 30 and the first connecting part 40 in the shell assembly.

In one embodiment, between step 1 and step 2, including after the first electrical connection portion 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 gap between the first connecting member 40 and the first electrical connection portion 70.

In one embodiment, between step 1 and step 2, including after the first electrical connection 70 passes through the first opening 42 and the second tab opening 430, after the second electrical connection 80 passes through the second opening 44 and the third tab opening 450, and after the sampling harness 101 passes through the third opening 46 and the fourth tab opening 470, injecting a flowing insulating material from the second tab opening 430 to the first opening 42, from the third tab opening 450 to the second opening 44, and from the fourth tab opening 470 to the third opening 46, and waiting for the insulating material to cure.

In an embodiment, the inverted placement in step 2 may be to sequentially place the electric core assembly 20 and the first circuit board 30 along a direction parallel to the third direction Z.

In an embodiment, the first connecting member 40 is placed upside down in step 2, and the opening of the third space 40b of the first connecting member 40 is oriented in a direction opposite to the third direction Z.

In an embodiment, step 3 specifically includes installing the electric core assembly 20, the first circuit board 30 and the first connector 40 in the first housing 11, and the first electric connection portion 70, the second electric connection portion 80 and the portion of the sampling wire harness 101 passing through the first connector 40 do not exceed the height of the first housing 11.

In an embodiment, step 3 specifically includes mounting the second circuit board 13 on the second housing 12, bending the first electrical connection portion 70 and the second electrical connection portion 80, connecting the first electrical connection portion 70 and the second electrical connection portion 80 to the second circuit board 13, and then connecting the second housing 12 to the first housing 11, thereby completing the assembly of the battery pack 100.

Referring to fig. 36, the present application further provides an electric device 200 using the battery pack 100. In an embodiment, the electric device 200 of the present application may be, but is not limited to, an unmanned aerial vehicle, a backup power source, an electric automobile, an electric motorcycle, an electric power assisted bicycle, an electric tool, a large household battery, and the like.

It should be understood by those skilled in the art that the above embodiments are only for illustrating the present application and are not to be taken as limiting the present application, and that suitable changes and modifications to the above embodiments are within the scope of the present disclosure as long as they are within the spirit and scope of the present application.

Claims (21)

1. A battery pack, comprising:

the battery cell assembly comprises a first column of battery cells stacked along a first direction and a second column of battery cells stacked along the first direction, the first column of battery cells and the second column of battery cells are arranged at intervals along a second direction, a first channel is arranged between the first column of battery cells and the second column of battery cells, and the second direction is perpendicular to the first direction;

a first circuit board connected to the electric core assembly, the first passage extending to the first circuit board;

the first connecting piece is connected with the first circuit board;

and the first insulating part is used for bonding and connecting the electric core assembly, the first circuit board and the first connecting piece.

2. The battery pack of claim 1, wherein along the second direction, a projection of the first circuit board and a projection of the cell assembly each overlap a projection of the first insulating member.

3. The battery of claim 1, wherein the cell comprises a cell casing, an electrode assembly disposed within the cell casing, and an electrode terminal connected to the electrode assembly and extending from the cell casing, the first insulator being bonded to the electrode terminal and extending out of the cell casing portion.

4. The battery of claim 3, further comprising a housing assembly, the cell assembly being disposed within the housing assembly, the cell housing including a first portion that houses the electrode assembly and a second portion that connects the first portion, the electrode terminal extending from the second portion, the first insulator being bonded to at least a portion of the second portion.

5. The battery pack of claim 1, wherein the battery pack further comprises a second connector, the first column of cells comprises a plurality of first core groups, the second column of cells comprises a plurality of second core groups, and the second connector connects at least one surface of the first core groups and the second core groups arranged along the first direction.

6. The battery according to claim 5, wherein the second connecting member comprises a first member comprising a first section and a third section, the first section being disposed between adjacent first groups of electric cores, and the third section being disposed between adjacent second groups of electric cores.

7. The battery pack according to claim 6, wherein the first member further comprises a second section provided in a gap between the first and second electric core groups in the second direction and connecting the first and third sections.

8. The battery pack according to claim 7, further comprising a third connecting member provided in a gap between the first and second cell groups in the second direction and connecting the second section.

9. The battery pack of claim 6, wherein the battery pack further comprises a first structural member including a first section connecting the first parts and located between adjacent first groups of cores and a second section connecting the first parts and located between adjacent second groups of cores.

10. The battery of claim 9, wherein the first structural member provides expansion space for the cells.

11. The battery pack according to claim 9, wherein the first structure further comprises a third section connecting the first section and the second section, the third section being provided in a gap between the first and second core packs in the second direction, the third section being connected to the second connecting member.

12. The battery pack according to claim 1, wherein the first circuit board is provided with a first communication hole, and the first insulating member is allowed to flow from the first communication hole into between the first connecting member and the first circuit board.

13. The battery pack of claim 1, wherein the first circuit board is provided with a first through hole, and a projection of at least a portion of the first through hole is located within a projection of the first channel in a third direction perpendicular to the first and second directions.

14. The battery pack according to claim 1, wherein the first connector is provided with a third space, and the first circuit board is provided in the third space.

15. The battery pack according to claim 14, wherein the first coupling member includes a first body and a first protrusion coupled to the first body, the first protrusion including a plurality of coupling walls, the first body and the plurality of coupling walls forming the third space, the first body and the first circuit board being disposed opposite to each other along a third direction, the third direction being perpendicular to the first and second directions.

16. The battery pack according to claim 15, wherein a projection of the first convex portion overlaps with a projection of the first circuit board in the first direction, and the projection of the first convex portion overlaps with a projection of the first circuit board in the second direction.

17. The battery pack of claim 15, further comprising a second insulator and a first electrical connection connected to the core assembly, wherein the first connector includes a first opening and a second protrusion disposed on the first body, the second protrusion has a second protrusion opening, the second protrusion opening communicates with the first opening, the first electrical connection extends through the first opening and the second protrusion opening to a side of the first connector away from the first circuit board, and the second insulator is disposed in a gap between the first opening and the first electrical connection.

18. The battery pack according to claim 1, wherein the first connecting member has a first protrusion formed on a surface thereof adjacent to the first circuit board, the first protrusion being connected to the first circuit board, and a first gap is formed between the first connecting member and the first circuit board along a third direction, the first gap having the first insulating member disposed therein, and the third direction being perpendicular to both the first direction and the second direction.

19. The battery of claim 1, wherein the first channel has a length in the first direction of 6mm to 30mm and/or a length in the second direction Y of 6mm to 80 mm.

20. The battery of claim 1, wherein the first insulating member is formed by injecting a flowable insulating material into the battery through the first channel after curing.

21. An electrical device comprising a battery as claimed in any one of claims 1 to 20.

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