CN115588810A

CN115588810A - Battery pack and electric device

Info

Publication number: CN115588810A
Application number: CN202211054527.3A
Authority: CN
Inventors: 彭芳桂; 杨鹏程; 杨典
Original assignee: Xiamen Xinnengda Technology Co Ltd
Current assignee: Xiamen Xinnengda Technology Co Ltd
Priority date: 2022-08-30
Filing date: 2022-08-30
Publication date: 2023-01-10

Abstract

Embodiments of the present application provide a battery pack and a power consumption device having the same, the battery pack including a first case, a cell assembly, and a second case. The first housing has a first space. The battery cell assembly is accommodated in the first space. The second housing has a second space. The first housing is accommodated in the second space. The second shell is provided with a first hole penetrating through the second shell. First casing exposes from first hole, sets up first casing in the second casing, promotes the shock resistance of group battery, reduces first casing and receives the deformation risk after assaulting to set up the second hole on the second casing, be convenient for dispel the heat.

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 may fall or be subjected to other external impact during transportation or use, and the housing of the battery pack may be deformed, thereby affecting the safety of the battery pack.

Disclosure of Invention

In view of the above, it is desirable to provide a battery pack and an electric device, which can improve the impact resistance of the battery pack and reduce the risk of deformation of the battery pack after impact.

Embodiments of the present application provide a battery pack including a first housing, a battery cell assembly, and a second housing. The first housing has a first space. The battery cell assembly is accommodated in the first space. The second housing has a second space. The first housing is accommodated in the second space. The second shell is provided with a first hole penetrating through the second shell. First casing exposes from first hole, sets up first casing in the second casing, promotes the shock resistance of group battery, reduces first casing and receives the deformation risk after assaulting to set up the second hole on the second casing, be convenient for dispel the heat.

Optionally, in some embodiments of the present application, a bracket and a third housing are further included. The bracket is located between the third housing and the first housing. The third housing encloses the first housing. The support, the third shell and the first shell are fixedly connected, and the first shell is sealed in the second shell.

Optionally, in some embodiments of the present application, an edge of the first housing connection bracket is provided with a seal. The bracket is fixedly connected with the second shell and connected with the sealing element.

Optionally, in some embodiments of the present application, the seal is provided with a groove. A portion of the first housing is disposed in the recess.

Optionally, in some embodiments of the present application, a first adhesive layer is disposed between the first housing and the seal. Be equipped with the second adhesive linkage between sealing member and the support and between sealing member and the second casing, can strengthen being connected of support and second casing and sealing member, reduce impurity such as moisture and enter into and lead to the risk of battery short circuit in the first casing.

Optionally, in some embodiments of the present application, the seal comprises a first seal portion, a second seal portion, and a third seal portion. The first sealing portion is coupled to an inner surface of the first housing. The second sealing portion is connected to an outer surface of the first housing. The third seal portion connects the first seal portion and the second seal portion. The third seal portion connects the bracket and an end face of the first housing facing the bracket.

Optionally, in some embodiments of the present application, the second housing is provided with a first recess. The second sealing part is arranged in the first concave part, so that the extending path of a gap between the second sealing part and the side wall of the second shell can be increased, moisture is reduced from entering the first shell, and the risk of short circuit of the battery is further reduced.

Optionally, in some embodiments of the present application, the stent includes a first region. The first seal portion and the first region are arranged in a first direction. The first seal portion connects the first region and the first housing.

Optionally, in some embodiments of the present application, the stent includes a second region connecting the first regions. The second region and the third seal portion are arranged in a third direction. The third seal portion connects the second region and the first housing. The third direction is perpendicular to the first direction.

Optionally, in some embodiments of the present application, the first housing is provided with a first opening and a second opening. A first connecting piece is arranged in the first shell. The first connector has a first passage connecting the first opening and the second opening. The second housing is provided with a third opening and a fourth opening. The third opening is communicated with the first opening. The fourth opening is communicated with the second opening. The heat of the battery pack is facilitated to be dissipated from the third opening and the fourth opening.

Optionally, in some embodiments of the present application, the second housing includes a second wall, a fifth sidewall, a sixth sidewall, a seventh sidewall, and an eighth sidewall, the second wall connects the fifth sidewall, the sixth sidewall, the seventh sidewall, and the eighth sidewall and forms the second space. At least one of the second wall, the fifth side wall, the sixth side wall, the seventh side wall and the eighth side wall is provided with a first hole, so that heat dissipation is facilitated.

Optionally, in some embodiments of the present application, the second wall, the fifth sidewall, the sixth sidewall, the seventh sidewall, and the eighth sidewall are all provided with a first hole, so as to improve heat dissipation.

Optionally, in some embodiments of the application, the second wall, the fifth side wall, the sixth side wall, the seventh side wall, and the eighth side wall are provided with a plurality of first holes, so that the second wall, the fifth side wall, the sixth side wall, the seventh side wall, and the eighth side wall are in a mesh structure, which reduces consumables of the second housing, and further reduces the weight of the second housing, so that the battery pack is lighter.

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

Foretell group battery and consumer set up first casing in the second casing, promote the shock resistance of group battery, reduce the risk that first casing received to warp after assaulting to set up the second hole on the second casing, be convenient for dispel the heat.

Drawings

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

Fig. 2 shows a schematic diagram of another view of the battery pack in some embodiments.

Fig. 3 illustrates an exploded schematic view of a battery pack in some embodiments.

Fig. 4 illustrates an exploded view of the housing assembly in some embodiments.

Fig. 5 illustrates a cross-sectional schematic view of a housing assembly in some embodiments.

Fig. 6 shows a schematic cross-sectional view of the battery pack of fig. 1 along II-II.

Fig. 7 shows a schematic structure diagram of the first row of electric core groups and the first transfer plate in some embodiments.

Fig. 8 shows a schematic structural diagram of a cell in some embodiments.

Figure 9 illustrates an exploded view of a cell in some embodiments.

Fig. 10 illustrates a schematic view of the battery pack with the housing assembly removed in some embodiments.

Fig. 11 is a schematic view showing the structure of the battery pack of fig. 10 with the first connecting member removed.

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

Fig. 13 shows a schematic view of the structure of the first insulating member in some embodiments.

Fig. 14 shows a schematic view of the structure of the second insulating member in some embodiments.

Fig. 15 shows a schematic cross-section of the battery in fig. 1 along III-III.

Fig. 16 shows an enlarged schematic view of part IV of fig. 15.

Fig. 17 shows a schematic cross-sectional view of a battery along III-III in further embodiments.

Fig. 18 shows an enlarged schematic view of a portion of fig. 17V.

Fig. 19 illustrates a schematic view of a first connector in some embodiments.

Fig. 20 is a schematic diagram illustrating another perspective of the first connector in some embodiments.

Fig. 21 shows a schematic diagram of the structure of the powered device in some embodiments.

Description of the main element symbols:

battery pack 100

Housing assembly 10

First housing 11

End surface 111a

First opening 11a

Second opening 11b

First wall 111

First side wall 112

First connection hole 1121

Second side wall 113

Third side wall 114

Fourth side wall 115

Second housing 12

First hole 12a

Fixing protrusion 12b

First concave portion 12c

Second wall 121

Fifth side wall 122

Third opening 122a

Sixth side wall 123

Fourth opening 123a

Seventh side wall 124

Eighth side wall 125

Third case 13

Support 14

First region 141

Second region 142

Sealing element 15

Groove 151

First seal portion 15a

Second seal portion 15b

Third seal portion 15c

Electrical core assembly 20

First row of electric core groups 20a

Second row electric core group 20b

Battery cell 21

First side surface 21a

Second side surface 21b

Third side surface 21c

Fourth side 21d

Fifth side face 21e

Sixth side 21f

Battery cell casing 211

First portion 211a

Second portion 211b

First housing 2111

Second housing 2112

First extension 2113

Second extension portion 2114

First seal portion 2115

Second seal portion 2116

Electrode assembly 212

Electrode terminal 213

Welded part 213a

First terminal 213b

Second terminal 213c

The first heat-conducting member 22a

Second heat-conducting member 22b

Elastic member 23

First electrically conductive member 24

Second concave portion 241

First connecting member 30

First passage 30a

Second connection hole 30b

Second passage 30c

First part 31

First surface 311

Second surface 312

Second part 32

First notch 321

Third part 33

Second notch 331

Circuit board 40

First transfer plate 50

Hole 51

First through hole 511

Second communication hole 512

Third communicating hole 513

First conductive sheet 52

First electrical connection portion 53

First conductive part 531

First insulating part 532

First sampling line bundle 54

First insulating member 60

First body 61

First through hole 61a

First bump 61b

Fifth opening 611

First convex part 612

Sixth opening 613

Second ledge 614

Seventh opening 615

Third convex portion 616

First heat conducting layer 101

Second heat conducting layer 102

First side plate 62

Second interposer 70

Second conductive sheet 71

Second electrical connection 72

Second conductive part 721

Second insulating portion 722

Second sampling line 73

Second insulating member 80

Second body 81

Second through hole 81a

Second bump 81b

Eighth opening 811

Fourth convex part 812

Ninth opening 813

Fifth convex part 814

Tenth opening 815

Sixth ledge 816

Second side plate 82

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 some embodiments of the present application, and not all 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.

It will be understood that the term "vertical" is used to describe an ideal condition between two components. In a state of actual production or use, a state of approximately vertical may exist between the two components. For example, in combination with numerical descriptions, vertical may refer to an angle between two straight lines ranging from 90 ° ± 10 °, vertical may also refer to a dihedral angle between two planes ranging from 90 ° ± 10 °, vertical may also refer to an angle between a straight line and a plane ranging from 90 ° ± 10 °. Two components described as "perpendicular" may not be absolutely straight, planar, or may be substantially straight or planar, and a component may be considered "straight" or "planar" when viewed macroscopically as if the overall direction of extension were straight or planar.

The term "parallel" is used to describe an ideal condition between two components. In a state of actual production or use, a state of approximately parallel may exist between the two components. For example, in connection with numerical descriptions, parallel may refer to an angle between two straight lines ranging from 180 ° ± 10 °, parallel may also refer to a dihedral angle between two planes ranging from 180 ° ± 10 °, parallel may also refer to an angle between a straight line and a plane ranging from 180 ° ± 10 °. Two components described as "parallel" may not be absolutely straight, planar, or may be substantially straight or planar, and a component may be considered "straight" or "planar" if its overall direction of extension is straight or planar in a macroscopic view.

The term "plurality" when used herein to describe a number of an element, means specifically that the element is two or more, unless otherwise defined.

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.

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 5, in one embodiment, a battery pack 100 includes a housing assembly 10, a battery cell assembly 20, and a first connecting member 30. The housing assembly 10 has a first space, and the cell assembly 20 and the first connecting member 30 are disposed in the first space. The housing assembly 10 is further provided with a first opening 11a and a second opening 11b communicating with the first space, and the first connecting member 30 is provided with a first passage 30a having one end connected to the first opening 11a and the other end connected to the second opening 11b. Part of the cell assembly 20 faces the first connector 30, heat can be dissipated through the first connector 30, external air can enter the first passage 30a from the first opening 11a and be discharged from the second opening 11b, or external air can enter the first passage 30a from the second opening 11b and be discharged from the first opening 11a, and part of heat of the cell assembly 20 flows in the first passage 30a through the external air and is dissipated to the external environment. The other part faces the inner wall of the casing assembly 10, and partial heat is dissipated to the external environment through the inner wall of the casing assembly 10, so that each surface of the electric core assembly 20 can conduct heat with the outside, and the heat dissipation efficiency of the electric core assembly 20 is improved.

In one embodiment, the battery pack 100 may use external air to remove heat from the core assembly 20 through the flow of the air. In one embodiment, when the battery pack 100 is in a static state, such as when the battery pack 100 is being charged, natural wind or an external air cooling device may be used to dissipate heat. In an embodiment, the battery pack 100 can be used for dynamic devices such as an unmanned aerial vehicle and an electric moped when in use, and because the devices move, the air flow speed is higher, and the quick heat dissipation of the battery pack 100 can be realized.

Referring to fig. 3, 4, 5 and 6, in an embodiment, the housing assembly 10 includes a first housing 11, the first housing 11 has a first space, and the first housing 11 includes a first wall 111, a first sidewall 112, a second sidewall 113, a third sidewall 114 and a fourth sidewall 115. The first side wall 112 and the second side wall 113 are both connected to the first wall 111, and the first side wall 112 and the second side wall 113 are arranged in an array. The third sidewall 114 and the fourth sidewall 115 are connected to the first wall 111, and the third sidewall 114 and the fourth sidewall 115 are arranged. The third sidewall 114 further connects the first sidewall 112 and the second sidewall 113, and the fourth sidewall 115 further connects the third sidewall 114 and the fourth sidewall 115, and forms a first space.

In one embodiment, the first housing 11 and the first connecting member 30 comprise a heat conductive material, which can improve heat dissipation performance. Alternatively, the first housing 11 and the first connecting member 30 may include a metal heat conductive material and a heat conductive insulating material, and the insulating material may cover an outer surface of the metal heat conductive material. Alternatively, the metal heat conductive material of the first housing 11 and the first connector 30 includes aluminum. Alternatively, the first housing 11 and the first connecting member 30 are made of a metal material.

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, and Z coordinate axes, which are two-by-two perpendicular, and define that the X direction is a first direction, the Y direction is a second direction, and the Z direction is a third direction, wherein the first direction X is a direction in which the first sidewall 112 and the second sidewall 113 are arranged, the second direction Y is a direction in which the third sidewall 114 and the fourth sidewall 115 are arranged, the third direction Z is a direction perpendicular to the surface of the first wall 111, and the first direction X is perpendicular to both the second direction Y and the third direction Z.

In one embodiment, the first opening 11a extends through the first sidewall 112, and the second opening 11b extends through the second sidewall 113. In an embodiment, along the first direction X, a projection of the first opening 11a overlaps a projection of the second opening 11b. Alternatively, along the first direction X, a projection of the first opening 11a partially overlaps a projection of the second opening 11b. Optionally, along the first direction X, a projection of the first opening 11a overlaps a projection of the second opening 11b. The first sidewall 112 is connected to the first connecting member 30, and the second sidewall 113 is connected to the first connecting member 30 such that one end of the first passage 30a is connected to the first opening 11a and the other end is connected to the second opening 11b. When the projection of the first opening 11a overlaps the projection of the second opening 11b along the first direction X, the distance of the first passage 30a is shortest and the air inlet and outlet volumes of the first opening 11a and the second opening 11b are large, thereby further improving heat dissipation. When the battery pack 100 moves in the direction opposite to the first direction X or the wind direction of the external air cooling device is in the first direction X, the first opening 11a is an air inlet, the second opening 11b is an air outlet, and air enters from the first opening 11a, passes through the first channel 30a, and is discharged from the second opening 11b, thereby improving heat dissipation. It is understood that, when the battery pack 100 moves in the first direction X or the wind direction of the external air-cooling device is directed in the opposite direction to the first direction X, the second opening 11b is an air inlet and the first opening 11a is an air outlet. In another embodiment, the first opening 11a is disposed on the third sidewall 114, and the second opening 11b is disposed on the fourth sidewall 115.

In another embodiment (not shown), the first opening 11a extends through the first wall 111, and the second opening 11b extends through the first sidewall 112 and the second sidewall 113. One end of the first channel 30a is connected with the first opening 11a, the other end is connected with the second opening 11b on the first side wall 112 and the second opening 11b on the second side wall 113, air can enter from the first opening 11a on the first wall 111, and is discharged from the second opening 11b on the first side wall 112 and the second opening 11b on the second side wall 113 through the first channel 30a, and the air outlet is increased, so that the heat dissipation is improved. Air can also enter from one of the second openings 11b on the first side wall 112 and the second openings 11b on the second side wall 113 and exit from the other second opening 11b and the first opening 11a, improving heat dissipation.

In an embodiment, the first and

second sidewalls

112 and 113 are provided with a plurality of first connection holes 1121, both side surfaces of the first connection member 30 disposed along the first direction X are provided with a plurality of second connection holes 30b, and a fastening member (not shown), such as a screw, passes through the first and second connection holes 1121 and 30b to fixedly connect the first connection member 30 to the first and

second sidewalls

112 and 113.

In an embodiment, the housing assembly 10 further includes a second housing 12, the second housing 12 has a second space, the first housing 11 is disposed in the second housing 12, and the second housing 12 is used to improve the impact resistance of the battery pack 100 and reduce the risk of deformation of the first housing 11 after an impact. Optionally, the second housing 12 comprises a plastic housing. Alternatively, the second housing 12 is formed by an injection molding process.

In one embodiment, the second housing 12 includes a second wall 121, a fifth sidewall 122, a sixth sidewall 123, a seventh sidewall 124, and an eighth sidewall 125. The fifth sidewall 122 and the sixth sidewall 123 are both connected to the second wall 121, and the fifth sidewall 122 and the sixth sidewall 123 are arranged along the first direction X. The seventh sidewall 124 and the eighth sidewall 125 are both connected to the second wall 121, and the seventh sidewall 124 and the eighth sidewall 125 are arranged in the second direction Y. The seventh sidewall 124 further connects the fifth sidewall 122 and the sixth sidewall 123, and the eighth sidewall 125 further connects the fifth sidewall 122 and the sixth sidewall 123 and forms a second space. At least one of the second wall 121, the fifth sidewall 122, the sixth sidewall 123, the seventh sidewall 124, and the eighth sidewall 125 is provided with a first hole 12a, and the first housing 11 is exposed from the first hole 12a, thereby facilitating heat dissipation. Optionally, the second wall 121, the fifth sidewall 122, the sixth sidewall 123, the seventh sidewall 124, and the eighth sidewall 125 are all provided with the first holes 12a, so as to promote heat dissipation, and the plurality of first holes 12a make the second casing 12 in a mesh shape, thereby reducing consumables of the second casing 12, further reducing the weight of the second casing 12, and making the battery pack 100 lighter. It is understood that the second housing 12 itself can also dissipate heat from the first housing 11.

In one embodiment, the fifth sidewall 122 is provided with a third opening 122a, and the sixth sidewall 123 is provided with a fourth opening 123a. Along the first direction X, projections of the third opening 122a and the fourth opening 123a overlap with a projection of the first passage 30 a. Along the first direction X, a projection of the first opening 11a overlaps a projection of the third opening 122 a. Optionally, the projection of the first opening 11a overlaps the projection of the third opening 122a, so that the amount of wind entering and exiting can be increased. Along the first direction X, a projection of the second opening 11b overlaps a projection of the fourth opening 123a. Alternatively, the projection of the second opening 11b overlaps the projection of the fourth opening 123a, which increases the amount of wind entering and exiting. Taking the battery pack 100 moving in the opposite direction to the first direction X or the wind direction of the external air-cooling apparatus in the first direction X as an example, air enters the first passage 30a through the third opening 122a and the first opening 11a and is discharged through the second opening 11b and the fourth opening 123a.

In an embodiment, the first housing 11 and the second housing 12 are connected by a gap or an interference fit, so that the outer surface of the first housing 11 is attached to the inner surface of the second housing 12, which is convenient for fixing the first housing 11.

In an embodiment, the housing assembly 10 further includes a third housing 13 and a bracket 14, the bracket 14 is located between the third housing 13 and the first housing 11, the bracket 14 connects the first housing 11 and the second housing 12, the third housing 13 encloses the first housing 11, and the bracket 14, the third housing 13 and the first housing 11 are fixedly connected to enclose the first housing 11 within the second housing 12. A fixing convex part 12b is arranged at the joint of the seventh side wall 124 and the fifth side wall 122, a fixing convex part 12b is arranged at the joint of the seventh side wall 124 and the sixth side wall 123, a fixing convex part 12b is arranged at the joint of the eighth side wall 125 and the fifth side wall 122, a fixing convex part 12b is also arranged at the joint of the eighth side wall 125 and the sixth side wall 123, the bracket 14 is connected with the first side wall 112, the second side wall 113, the third side wall 114 and the fourth side wall 115, and the bracket 14 and the first wall 111 are arranged in a third direction Z. The bracket 14 is fixedly attached to the fixing projection 12b by a fastener to restrain the first housing 11 within the second housing 12. The third housing 13 is fixedly connected to a side of the bracket 14 facing away from the second housing 12. When the second shell 12 and/or the third shell 13 need to be replaced, the second shell 12 and/or the third shell 13 can be disassembled and replaced by loosening the fasteners.

In one embodiment, the battery pack 100 further includes a circuit board 40, and the circuit board 40 is disposed in the third housing 13. The circuit board 40 is electrically connected to the core assembly 20. Optionally, the circuit board 40 includes a BMS module (Battery Management System), specifically, the BMS module includes a plurality of electronic components, and the plurality of electronic components can realize functions such as data acquisition, control, protection, communication, electric quantity calculation, signal transmission, power transmission to the Battery.

In an embodiment, the housing assembly 10 further comprises a seal 15, the seal 15 connecting a side of the first, second, third and

fourth side walls

112, 113, 114, 115 facing away from the first wall 111. When the bracket 14 is fixedly connected to the second housing 12, the bracket 14 presses the seal 15 in the third direction Z. Optionally, the sealing member 15 is a closed-loop structure, the sealing member 15 is provided with a groove 151, and the sides of the first side wall 112, the second side wall 113, the third side wall 114 and the fourth side wall 115 facing away from the first wall 111 are all arranged in the groove 151. Along the first direction X, the projections of the first and

second side walls

112, 113 overlap the projection of the seal 15. Along the second direction Y, the projections of the third and

fourth sidewalls

114, 115 overlap with the projection of the seal 15.

In an embodiment, the seal 15 comprises a first seal portion 15a, a second seal portion 15b and a third seal portion 15c. The first seal portion 15a is provided between the inner surface of the first housing 11 and the holder 14. The second sealing portion 15b is provided between the outer surface of the first housing 11 and the inner surface of the second housing 12, the third sealing portion 15c connects the first sealing portion 15a and the second sealing portion 15b, the third sealing portion 15c is provided between the bracket 14 and the first housing 11, and the bracket 14 may connect the third sealing portion 15c.

Alternatively, the bracket 14 includes a first region 141, and the first sealing portion 15a and the first region 141 are arranged along the first direction X, and the first sealing portion 15a includes two opposite sides along the first direction X, wherein one side is connected to the first region 141, and the other side is connected to the first housing 11.

Optionally, the bracket further includes a second region 142, the second region 142 connects the first region 141, and the second region 142 is arranged in line with a third sealing portion 15c along the third direction Z, the third sealing portion 15c includes two opposite sides arranged along the third direction Z, wherein one side connects the second region 142, and the other side connects the end surface 111a of the first housing 11 facing the bracket. The end surface 111a is an extension of one end of the fifth sidewall 122, the sixth sidewall 123, the seventh sidewall 124, and the eighth sidewall 125 facing away from the second wall 121 along a plane in which the first direction X and the second direction Y are located.

In one embodiment, a first adhesive layer (not shown) is disposed between the first sealing portion 15a and the inner surface of the first housing 11, and a first adhesive layer is disposed between the second sealing portion 15b and the outer surface of the first housing 11, and the sealing member 15 is adhesively fixed to the first housing 11 through the first adhesive layer. Optionally, the first adhesive layer includes a sealant. A second adhesive layer (not shown) is provided between the first sealing portion 15a and the bracket 14, a second adhesive layer is provided between the second sealing portion 15b and the inner surface of the second housing 12, and a second adhesive layer is provided between the third sealing portion 15c and the bracket 14. Optionally, the second adhesive layer includes a sealant. By providing the second adhesive layer, the connection between the bracket 14 and the second case 12 and the sealing member 15 is reinforced, and the risk of short circuit of the battery caused by the entry of impurities such as moisture into the first case 11 is reduced.

In an embodiment, the ends of the fifth side wall 122, the sixth side wall 123, the seventh side wall 124 and the eighth side wall 125 facing away from the second wall 121 are all provided with a first concave portion 12c, the second sealing portion 15b is arranged in the first concave portion 12c, and by arranging the second sealing portion 15b in the first concave portion 12c, the extending path of the gap between the second sealing portion 15b and the side wall of the second housing 12 is increased, the moisture entering into the first housing 11 is reduced, and the risk of short circuit of the battery is further reduced. Taking the sixth sidewall 123 as an example, an end of the sixth sidewall 123 away from the second wall 121 is recessed along the first direction X to form a first recess 12c. Along the second direction Y, the projection of the second sealing portion 15b overlaps the projection of the first recess 12c. Alternatively, the projection of the second sealing portion 15b is located within the projection of the first recess 12c. It is understood that the depth of the first recess 12c in the first direction X may be an increasing extension path.

Referring to fig. 6-10, in one embodiment, the electric core assembly 20 includes a first row of electric core assemblies 20a. The first row of electric core assemblies 20a is disposed between the first sidewall 112 and the second sidewall 113, the first row of electric core assemblies 20a is disposed between the third sidewall 114 and a portion of the first connecting member 30, and the first row of electric core assemblies 20a is further disposed between the first sidewall 111 and a portion of the first connecting member 30. The first row of electric core groups 20a includes a plurality of electric cores 21 stacked in the first direction X. The battery cell 21 includes a cell casing 211, an electrode assembly 212 provided within the cell casing 211, and an electrode terminal 213 connected to the electrode assembly 212 and led out of the cell casing 211. In one embodiment, the cell casing 211 includes a first portion 211a and a second portion 211b, the first portion 211a accommodates the electrode assembly 212, the second portion 211b is connected to the first portion 211a, and the electrode terminal 213 protrudes from the second portion 211b.

In an embodiment, the cell housing 211 includes a first shell 2111 and a second shell 2112, the first shell 2111 being coupled to the second shell 2112. At least one of the first and second housings 2111 and 2112 is provided with a recess for placing the electrode assembly 212. The first and second housings 2111 and 2112 may be folded along the connection position (dotted line position) so that the first and second housings 2111 and 2112 are overlapped to form a first portion 211a to enclose the electrode assembly 212. 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 and 2112 are folded along the connection location, the first and

second extensions

2113 and 2114 are overlapped and sealingly connected to form a second portion 211b. 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 213 protrudes from the first sealing portion 2115 out of the first portion 211a. Optionally, the second portion 211b includes two second sealing portions 2116, and the two second sealing portions 2116 are arranged in line in the second direction Y. Optionally, the second portion 211b includes a first sealing portion 2115, the cell 21 includes two electrode terminals 213, and the two electrode terminals 213 extend out of the cell housing 211 from the first sealing portion 2115. In other embodiments, the first and second housings 2111 and 2112 are disposed non-integrally, the second portion 211b includes two first sealing portions 2115, the two first sealing portions 2115 are disposed in a third direction Z, the battery cell 21 includes two electrode terminals 213, one of the electrode terminals 213 extends out of the battery cell casing 211 from one of the first sealing portions 2115, the other electrode terminal 213 extends out of the battery cell casing 211 from the other first sealing portion 2115, and the two electrode terminals 213 are disposed in the third direction Z.

In one embodiment, the electrode assembly 212 includes a winding type structure formed by winding a positive electrode tab, a negative electrode tab, and a separator. In other embodiments, the electrode assembly 212 may also be a laminated structure, in which a positive electrode tab, a separator, and a negative electrode tab are sequentially laminated to form one electrode assembly unit, and a plurality of electrode assembly units are further laminated to form the electrode assembly 212. 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 electrode terminal 213 has a welding portion 213a extending out of the cell casing 211, and the welding portion 213a is formed by bending the electrode terminal 213. In one embodiment, the electrode terminal 213 includes a first terminal 213b and a second terminal 213c, the first terminal 213b and the second terminal 213c have opposite polarities, and one of the first terminal 213b and the second terminal 213c is a positive electrode terminal and the other is a negative electrode terminal. In the third direction Z, a projection of the welding portion 213a of the first terminal 213b of the cell 21 at least partially overlaps a projection of the welding portion 213a of the second terminal 213c of the adjacent cell 21. The first terminal 213b and the second terminal 213c of the adjacent battery cells 21 are bent toward each other, the welding portion 213a of the first terminal 213b and the welding portion 213a of the second terminal 213c are stacked and connected to each other, and the adjacent battery cells 21 are connected in series. By disposing the welding portions 213a of the adjacent cells 21 to be connected to each other, the number of processing steps is reduced. In other embodiments, adjacent cells 21 may be connected in parallel.

In an embodiment, taking a single battery cell 21 as an example, the battery cell 21 includes a first side 21a, a second side 21b, a third side 21c, a fourth side 21d, a fifth side 21e, and a sixth side 21f. The first side surface 21a and the second side surface 21b are arranged in the first direction X. The third side 21c and the fourth side 21d are arranged in line in the second direction Y. The fifth side surface 21e and the sixth side surface 21f are arranged in the third direction Z, and the electrode terminal 213 protrudes from the fifth side surface 21 e. In one embodiment, the first side 21a is disposed toward the first side wall 112 and the second side 21b is disposed toward the second side wall 113. The third side face 21c is disposed toward the third side wall 114. The fourth side 21d is disposed toward a part of the first connecting member 30. The fifth side 21e is disposed toward the other part of the first link 30. The sixth side 21f is disposed toward the first wall 111. The first side 21a, the second side 21b, the third side 21c, the fourth side 21d, the fifth side 21e and the sixth side 21f of the battery cell 21 can transfer heat with the outside, so that the heat dissipation of the battery cell assembly 20 is improved, and the temperature of the battery pack 100 is reduced. It is to be understood that the above-described manner is also applicable to the case of a plurality of battery cells 21.

In an embodiment, the first row of electric core assemblies 20a further includes a first heat conducting member 22a, each electric core 21 is thermally connected to at least one first heat conducting member 22a, the first heat conducting member 22a is thermally connected to the first casing 11 and the first connecting member 30, so that heat of the electric core 21 is transferred to the first casing 11 and the first connecting member 30 through the first heat conducting member 22a, and then the electric core 21 is cooled through the first casing 11 and the first connecting member 30. The first heat conduction member 22a is connected to the first side 21a or the second side 21b and extends to the third side 21c, the fourth side 21d and the sixth side 21f after being bent. The first heat-conducting member 22a located at the first side 21a is thermally connected to the first sidewall 112. The first heat-conducting member 22a located at the second side 21b is thermally connected to the second side wall 113. The first thermal conduction member 22a located on the third side 21c is thermally connected to the third side wall 114. The first heat-conducting member 22a located on the fourth side 21d is thermally connected to the surface of the first connecting member 30. The first heat conduction member 22a located on the sixth side 21f is thermally connected to the surface of the first wall 111, and the heat of the battery cell 21 is transferred to the first connection member 30 and the first housing 11 through the first heat conduction member 22a, so that the heat dissipation effect on the battery cell 21 is improved. In another embodiment, the first thermal conduction member 22a does not need to extend to the fourth side 21d, and the fourth side 21d is directly thermally connected to the first connection member 30. Wherein, the thermal connection can be realized by heat transfer connection through heat-conducting glue and the like. The thermal connection may also be a direct contact connection between two structural members, which is realized by, for example, the first heat conduction member 22a being in contact connection with the first housing 11 and the first connection member 30. Alternatively, the first heat-conducting member 22a includes an aluminum sheet.

In an embodiment, an elastic member 23 is further disposed between adjacent first heat conduction members 22a, when the battery cell 21 expands, the elastic member 23 may be compressed to provide an expansion space for the battery cell 21, and optionally, the elastic member 23 includes foam.

In one embodiment, the electric core assembly 20 further comprises a second row of electric core groups 20b, and the first row of electric core groups 20a and the second row of electric core groups 20b are arranged along the second direction Y. The first connecting member 30 is disposed between the first row of electric core groups 20a and the second row of electric core groups 20b along the second direction Y. The second row of core assemblies 20b is disposed between a portion of the first connecting member 30 and the fourth side wall 115, the second row of core assemblies 20b is disposed between the first side wall 112 and the second side wall 113, and the second row of core assemblies 20b is further disposed between the first wall 111 and a portion of the first connecting member 30. In one embodiment, the first connecting member 30 is thermally connected to the first row of electric core assemblies 20a and the second row of electric core assemblies 20b, and can simultaneously transfer heat of the first row of electric core assemblies 20a and the second row of electric core assemblies 20b to the first connecting member 30, and perform rapid heat dissipation through the first channel 30 a.

In one embodiment, the cells 21 of the second row of cell groups 20b have the same structure as the cells 21 of the first row of cell groups 20a. The second column of battery cells 20b includes a plurality of battery cells 21 stacked along the first direction X, and each battery cell 21 is in contact with and connected to the first connecting member 30 and the first casing 11.

In one embodiment, the second row of electric core assemblies 20b further includes a second heat-conducting member 22b, and the second heat-conducting member 22b and the first heat-conducting member 22a are substantially identical in structure. Optionally, the first connecting member 30 is connected to the first heat conducting member 22a, the first connecting member 30 is connected to the second heat conducting member 22b, and the first connecting member 30 is located between the first heat conducting member 22a and the second heat conducting member 22b, so as to improve heat dissipation of the electric core assembly 20.

In one embodiment, referring to fig. 12, in one embodiment, the battery pack 100 further includes a first conductive member 24. One end of the first conductive member 24 is connected to the first row of electric core assemblies 20a, and the other end is connected to the second row of electric core assemblies 20b. Optionally, one end of the first conductive member 24 is connected to the first terminal 213b of the cells 21 in the first row of the cell core group 20a, and the other end is connected to the second terminal 213c of the cells 21 in the second row of the cell core group 20b, so as to realize the series connection of the first row of the cell core group 20a and the first row of the cell core group 20a. Optionally, one end of the first conductive member 24 is connected to the first terminal 213b of the electric core 21 in the first row of the electric core group 20a, and the other end is connected to the first terminal 213b of the electric core 21 in the second row of the electric core group 20b, so as to realize the parallel connection between the first row of the electric core group 20a and the first row of the electric core group 20a. The first conductive member 24 is provided with a second recess 241, and the first connecting member 30 is partially disposed in the second recess 241.

Referring to fig. 10, 11 and 12, in an embodiment, the battery pack 100 further includes a first connection plate 50, and the first connection plate 50 is connected to the first row of battery packs 20a. The first transfer plate 50 is provided with a plurality of sets of holes 51, each set of holes 51 including a first communication hole 511 and a second communication hole 512 arranged in the first direction X. The first communication hole 511 and the second communication hole 512 are provided extending in the second direction Y. The first terminal 213b of the adjacent cell 21 passes through the first communication hole 511, the second terminal 213c of the other cell 21 passes through the second communication hole 512, and the welded portion 213a of the first terminal 213b and the welded portion 213a of the second terminal 213c are stacked on each other and then connected to the first transfer plate 50.

In one embodiment, the first adapter plate 50 comprises a circuit board. Alternatively, the first transfer Board 50 includes a Printed Circuit Board (PCB), and the first transfer Board 50 is provided with a plurality of conductive wires (not shown). Alternatively, the first transfer board 50 includes a Flexible Printed Circuit (FPC).

Optionally, a plurality of first conductive sheets 52 are disposed on a side of the first adapter plate 50 facing away from the battery cells 21. The first conductive plate 52 is provided between the first communication hole 511 and the second communication hole 512. The first terminal 213b of the adjacent cell 21 passes through the first communication hole 511, the second terminal 213c of the other cell 21 passes through the second communication hole 512, and the welded portion 213a of the first terminal 213b and the welded portion 213a of the second terminal 213c are stacked on each other and then welded to the first conductive sheet 52. Welding includes laser welding, ultrasonic welding, and the like. In other embodiments, the soldering portion 213a and the first conductive sheet 52 may be connected by other connection methods such as conductive adhesive.

Optionally, each group of holes 51 further includes a third communication hole 513, and the third communication hole 513 is located between adjacent first conductive sheets 52 as viewed in the third direction Z.

In one embodiment, the battery pack 100 further includes a first electrical connection portion 53 connected to the first junction plate 50, the first electrical connection portion 53 includes a first conductive portion 531 and a first insulating portion 532, the first insulating portion 532 is disposed on the first conductive portion 531, two ends of the first conductive portion 531 extend out of the first insulating portion 532, one end of the first conductive portion 531 is connected to the first conductive sheet 52, and the other end of the first conductive portion is connected to the circuit board 40. In one embodiment, the first conductive portion 531 and the first conductive sheet 52 are of a unitary structure. In one embodiment, the first adapter plate 50 is further provided with a first sampling harness 54, and the first sampling harness 54 is connected to the circuit board 40. The first sampling harness 54 may collect information such as current, voltage, temperature, etc. of the battery cell 21.

Referring to fig. 12, 13 and 14, in an embodiment, the battery pack 100 further includes a first insulating member 60, where the first insulating member 60 is disposed on a side of the first conductive sheet 52 away from the battery cell 21, and is used to insulate and protect the first conductive sheet 52 and the electrode terminal 213. The first insulator 60 includes a first body 61 and a first side plate 62 extending from an edge of the first body 61. Along the third direction Z, the projection of the first transfer plate 50 overlaps with the projection of the first body 61. Alternatively, the projection of the first transfer plate 50 is positioned within the projection of the first body 61 such that the first body 61 covers the first conductive sheet 52 and the electrode terminal 213. In the first direction X or the second direction Y, the projection of the first side plate 62 overlaps with the projection of the first adapter plate 50. Further, along the first direction X or the second direction Y, the projection of the first conductive sheet 52 is located within the projection of the first side plate 62.

In an embodiment, the first body 61 is provided with a fifth opening 611, and the fifth opening 611 penetrates through the surface of the first body 61 along the third direction Z. The first electrical connection portion 53 extends to a side of the first body 61 away from the first adapter plate 50 after passing through the fifth opening 611. Optionally, the first body 61 is provided with a first protrusion 612, the first protrusion 612 is provided at an edge of the fifth opening 611, and the first electrical connection portion 53 is limited by the first protrusion 612. Along the second direction Y, the projection of the first conductive part 531 is located within the projection of the first convex part 612. The first convex portion 612 insulates one end of the first conductive portion 531 extending out of the first insulating portion 532, so that the risk of short circuit of the portion of the first conductive portion 531 extending out of the first insulating portion 532 is reduced. Optionally, along the second direction Y, a projection of the first insulating portion 532 overlaps a projection of the first protrusion 612, so as to further improve insulation of the protruding portion of the first conductive portion 531.

In an embodiment, the first body 61 is provided with a sixth opening 613, and the sixth opening 613 penetrates through the surface of the first body 61 along the third direction Z. The first conductive member 24 passes through the sixth opening 613 and is connected to the first conductive sheet 52, and optionally, the first main body 61 is provided with a second protrusion 614, the second protrusion 614 is located at the edge of the sixth opening 613, along the second direction Y, the projection of the first conductive member 24 overlaps the projection of the second protrusion 614, and the first conductive member 24 is limited and insulated by the second protrusion 614. In the second direction Y, the second protrusion 614 is partially located between the first conductive member 24 and the first connecting member 30, so as to reduce the risk of short circuit between the first conductive member 24 and the first connecting member 30.

In one embodiment, the first body 61 is provided with a seventh opening 615, and the seventh opening 615 penetrates through a surface of the first body 61. The edge of the seventh opening 615 is provided with a third convex portion 616, and the first sampling harness 54 passes through the first body 61 through the seventh opening 615 and is connected to the circuit board 40.

Referring to fig. 12, 15-18, in an embodiment, the first heat conduction layer 101 is between the cell casing 211 and the first adapter plate 50. In the first direction X, a projection of the electrode terminal 213 overlaps a projection of the first heat conduction layer 101, and the electrode terminal 213 between the cell casing 211 and the first transfer plate 50 is fixed, insulated, and heat-conducted through the first heat conduction layer 101.

In one embodiment, the first thermal conductive layer 101 is formed by pouring an insulating material into the battery pack 100 and then curing the insulating material. Optionally, the first heat conduction layer 101 includes at least one of a potting adhesive and a foaming adhesive. Optionally, the first thermal conductive layer 101 is formed by pouring a potting adhesive into the battery pack 100 and then curing the potting adhesive. Alternatively, the first heat conductive layer 101 is formed by foaming foam. Optionally, the first heat conduction layer 101 includes a resin, and after the resin is heated and melted, the flowable resin is disposed between the cell housing 211 and the first adapter plate 50 by means of pouring, and then is cured. Alternatively, the first heat conduction layer 101 is formed by disposing a flowable resin between the cell housing 211 and the first heat transfer plate 50 by an injection molding process and then curing the flowable resin. The first heat conduction layer 101 fills the gap between the cell casing 211 and the first transfer plate 50, enhances the insulation protection of the electrode terminal 213 and the first transfer plate 50, and restricts the entry of foreign substances such as water and dust between the cell casing 211 and the first transfer plate 50.

In one embodiment, a second heat conductive layer 102 is disposed between the first insulating member 60 and the first adapter plate 50. In the first direction X, a projection of the welding portion 213a of the electrode terminal 213 overlaps a projection of the second heat conduction layer 102, a projection of the first conductive sheet 52 overlaps a projection of the second heat conduction layer 102, a projection of the first conductive member 24 overlaps a projection of the second heat conduction layer 102, and the welding portion 213a, the first conductive member 24, and the first conductive sheet 52 are fixed, insulated, and thermally conductive by the second heat conduction layer 102.

In one embodiment, the second thermal conductive layer 102 is formed by pouring an insulating material into the battery pack 100 and then curing the insulating material. Optionally, the second heat conduction layer 102 includes at least one of a potting adhesive and a foaming adhesive. Alternatively, the second thermal conductive layer 102 is formed by pouring a potting adhesive into the battery pack 100 and then curing the potting adhesive. Alternatively, the second heat conductive layer 102 is formed by foaming a foam rubber. Optionally, the second heat conduction layer 102 includes a resin, and after the resin is heated and melted, the flowable resin is disposed between the first insulating member 60 and the first adapter plate 50 by means of pouring and then cured. Alternatively, the second thermally conductive layer 102 is formed by curing a flowable resin between the cell housing 211 and the first transfer plate 50 by an injection molding process. The second heat conductive layer 102 fills the gap between the first insulating member 60 and the first relay plate 50, enhances the insulation protection of the first insulating member 60 and the first relay plate 50, and restricts the entry of foreign substances such as water and dust between the first insulating member 60 and the first relay plate 50.

In one embodiment, the first connecting member 30 is disposed on a side of the first insulating member 60 facing away from the first heat conducting plate 50, and heat of the electrode terminal 213 is transferred to the second heat conducting layer 102 through the first heat conducting layer 101 and then transferred from the second heat conducting layer 102 to the first connecting member 30. Optionally, a third heat conduction layer (not shown) is disposed between the first insulating member 60 and the first connecting member 30, the second heat conduction layer 102 is transferred to the third heat conduction layer, and is transferred to the first connecting member 30 through the third heat conduction layer, and then the first connecting member 30 dissipates heat to the first row of the electric core assemblies 20a, and by adding the third heat conduction layer, the efficiency of transferring heat from the electric core 21 to the first connecting member 30 can be improved. Optionally, the third thermally conductive layer includes a thermally conductive paste.

In one embodiment, the first body 61 is provided with a first through hole 61a, and the first through hole 61a penetrates through the first body 61. The flowing heat conductive insulating material flows between the first insulating member 60 and the first connecting member 30 through the first through hole 61 a. In one embodiment, the insulating material of the third thermal conductive layer is cured after being poured into the battery pack 100. Optionally, the third heat conduction layer includes at least one of a potting adhesive and a foaming adhesive. Optionally, the third heat conduction layer is formed by pouring the potting adhesive into the battery pack 100 and then curing the potting adhesive. Optionally, the third heat conducting layer is formed by foaming glue. Optionally, the third heat conduction layer includes resin, and after the resin is heated and melted, the flowable resin is disposed between the first insulation member 60 and the first connection member 30 by means of pouring and then cured. Optionally, the third thermal conductive layer is formed by disposing a flowable resin between the first insulating member 60 and the first connecting member 30 by an injection molding process and then curing the flowable resin, and the third thermal conductive layer fills a gap between the first insulating member 60 and the first connecting member 30, so that insulation protection of the first insulating member 60 and the first connecting member 30 is enhanced, and foreign substances such as water and dust are prevented from entering between the first insulating member 60 and the first connecting member 30.

In an embodiment, the first heat conductive layer 101, the second heat conductive layer 102 and the third heat conductive layer are formed by curing the same material. A fast-setting, quick-drying, insulating material, such as a quick-drying adhesive or a foaming adhesive, which is curable quickly, is first injected into the fifth opening 611, the sixth opening 613, and the seventh opening 615. The flow of the insulating material to other positions of the first body 61 is restricted by the first, second, and

third protrusions

612, 614, and 616, the cured insulating material closes the fifth, sixth, and

seventh openings

611, 613, and 615, and then the battery pack 100 is assembled as shown in fig. 10 and inverted in a direction opposite to the third direction Z, and then the flowable insulating material is injected through the potting channel, and the insulating material flows between the cell housing 211 and the first coupling plate 50, and may flow between the first insulating member 60 and the first coupling plate 50 through the first, second, and third communication holes 511, 512, and 513, and may flow between the first insulating member 60 and the first coupling plate 50 through the first through hole 61a, and may flow between the first insulating member 60 and the first coupling member 30 through the first through hole 61 a. The flowable insulating material between the first insulating member 60 and the first connecting member 30 is cured to form the third thermally conductive layer, the flowable insulating material between the first insulating member 60 and the first adapter plate 50 is cured to form the second thermally conductive layer 102, and the flowable insulating material between the cell housing 211 and the first adapter plate 50 is cured to form the first thermally conductive layer 101. Alternatively, when the battery pack 100 is inverted, the gaps between the battery cells 21 may serve as glue filling channels. When the flowable insulating material is injected through the glue filling channel, the first heat conduction layer 101, the second heat conduction layer 102 and the third heat conduction layer are made of the same insulating material, and the first heat conduction layer 101, the second heat conduction layer 102 and the third heat conduction layer are formed through a one-time injection process means, so that the production is facilitated.

In one embodiment, a projection of the first through hole 61a overlaps a projection of the electrode terminal 213 along the third direction Z, facilitating the heat conductive and insulating material to flow from the first through hole 61a into between the first insulating member 60 and the first connecting member 30.

In one embodiment, a side of the first body 61 facing the first adapter plate 50 is provided with a first protrusion 61b. When the first insulating member 60 is connected to the first adapter plate 50, the first protrusion 61b can be contacted to the first adapter plate 50 and supported by the first protrusion 61b, so that a gap is formed between the first insulating member 60 and the first adapter plate 50 for accommodating the second heat conducting layer 102. It can be understood that the gap between the first insulating member 60 and the first heat conducting layer 50, and thus the amount of the second heat conducting layer 102 between the first insulating member 60 and the first heat conducting layer 50, can be adjusted by adjusting the length of the first protrusion 61b along the third direction Z.

In one embodiment, the battery pack 100 further includes a second adapter plate 70, and the second adapter plate 70 is connected to the second row of electric core assemblies 20b. A plurality of second conductive sheets 71 are disposed on a side of the second interposer 70 away from the battery cells 21, the second interposer 70 has a plurality of sets of holes same as the first interposer 50, the first terminal 213b of an adjacent battery cell 21 passes through the second interposer 70, the second terminal 213c of another battery cell 21 passes through the second interposer 70, and the welding portion 213a of the first terminal 213b and the welding portion 213a of the second terminal 213c are stacked and then welded to the second conductive sheets 71. Welding includes laser welding, ultrasonic welding, and the like. In other embodiments, the soldering portion 213a and the second conductive sheet 71 may be connected by other connection methods such as conductive adhesive.

In one embodiment, the second interposer 70 includes a circuit board. Optionally, the second interposer 70 includes a Printed Circuit Board (PCB), and a plurality of wires (not shown) are disposed on the second interposer 70. Optionally, the second interposer 70 includes a Flexible Printed Circuit (FPC).

In an embodiment, the battery pack 100 further includes a second electrical connection portion 72 connected to the second interposer 70, the second electrical connection portion 72 includes a second conductive portion 721 and a second insulating portion 722, the second insulating portion 722 is sleeved on the second conductive portion 721, two ends of the second conductive portion 721 extend out of the second insulating portion 722, one end of the second conductive portion 721 is connected to the second conductive sheet 71, and the other end is connected to the circuit board 40. In one embodiment, the second conductive part 721 and the second conductive sheet 71 are an integral structure. In one embodiment, the second adapter plate 70 is further provided with a second sampling harness 73, and the second sampling harness 73 is connected to the circuit board 40. The second sampling wire harness 73 can collect information such as current, voltage, temperature and the like of the battery cell 21.

In an embodiment, the battery pack 100 further includes a second insulating member 80, and the second insulating member 80 is disposed on a side of the second conductive sheet 71 away from the battery cell 21, and is used for insulating and protecting the second conductive sheet 71 and the electrode terminal 213. The second insulating member 80 includes a second body 81 and a second side plate 82 extending from an edge of the second body 81. Along the third direction Z, the projection of the second adapter plate 70 overlaps with the projection of the second body 81. Alternatively, the projection of the second interposer 70 is located within the projection of the second body 81, such that the second body 81 covers the second conductive part 721 and the electrode terminal 213. The projection of the second side plate 82 overlaps with the projection of the second interposer 70 along the first direction X or the second direction Y. Further, along the first direction X or the second direction Y, the projection of the second conductive sheet 71 is located within the projection of the second side plate 82.

In one embodiment, the second body 81 is provided with an eighth opening 811, and the eighth opening 811 penetrates through the surface of the second body 81 along the third direction Z. The second electrical connection portion 72 extends to a side of the second body 81 away from the second interposer 70 after passing through the eighth opening 811. Optionally, the second body 81 is provided with a fourth protrusion 812, the fourth protrusion 812 is provided at an edge of the eighth opening 811, and the second electrical connection portion 72 is limited by the fourth protrusion 812. Along the second direction Y, the projection of the second conductive part 721 is located within the projection of the fourth convex part 812. The fourth protrusion 812 insulates the end of the second conductive part 721 extending out of the second insulating part 722, thereby reducing the risk of short circuit at the portion of the second conductive part 721 extending out of the second insulating part 722. Optionally, along the second direction Y, the projection of the second insulating portion 722 overlaps the projection of the fourth protrusion 812, so as to further improve the insulation of the protruding portion of the second conductive portion 721.

In an embodiment, the second body 81 is provided with a ninth opening 813, and the ninth opening 813 penetrates through a surface of the second body 81 along the third direction Z. The first conductive component 24 passes through the ninth opening 813 and is connected to the second conductive sheet 71, and optionally, the second body 81 is provided with a fifth protruding portion 814, the fifth protruding portion 814 is located at an edge of the ninth opening 813, along the second direction Y, a projection of the first conductive component 24 overlaps a projection of the fifth protruding portion 814, and the first conductive component 24 is limited and insulated by the fifth protruding portion 814. In the second direction Y, a part of the structure of the fifth protruding portion 814 is located between the first conductive member 24 and the first connecting member 30, so as to reduce the risk of short circuit between the first conductive member 24 and the first connecting member 30.

In one embodiment, the second body 81 is provided with a tenth opening 815, and the tenth opening 815 penetrates through a surface of the second body 81. The tenth opening 815 is provided at an edge thereof with a sixth protrusion 816, and the second sampling wire harness 73 passes through the second body 81 through the tenth opening 815 and is connected to the circuit board 40.

In one embodiment, a fourth thermal conductive layer (not shown) is disposed between the cell housing 211 and the second interposer 70. In the first direction X, a projection of the electrode terminal 213 overlaps a projection of the fourth heat conduction layer, and the electrode terminal 213 between the cell housing 211 and the second interposer 70 is fixed, insulated, and heat-conducted through the fourth heat conduction layer.

In one embodiment, the fourth thermal conductive layer is formed by pouring an insulating material into the battery pack 100 and then curing. Optionally, the fourth heat conduction layer includes at least one of a potting adhesive and a foaming adhesive. Optionally, the fourth heat conduction layer is formed by pouring the potting adhesive into the battery pack 100 and then curing the potting adhesive. Optionally, the fourth heat conduction layer is formed by foaming glue. Optionally, the fourth heat conducting layer includes resin, and after the resin is heated and melted, the flowable resin is disposed between the cell casing 211 and the second interposer 70 by means of pouring, and then is cured. Optionally, the fourth heat conducting layer is formed by disposing a flowable resin between the cell casing 211 and the second adapter plate 70 by an injection molding process and then curing the flowable resin. The fourth heat conductive layer fills the gap between the cell casing 211 and the second interposer 70, enhances the insulation protection between the electrode terminal 213 and the second interposer 70, and prevents foreign substances such as water and dust from entering between the cell casing 211 and the second interposer 70.

In one embodiment, a fifth thermally conductive layer (not shown) is disposed between the second insulator 80 and the second interposer 70. In the first direction X, a projection of the welding portion 213a of the electrode terminal 213 overlaps a projection of the fifth heat conduction layer, a projection of the second conductive sheet 71 overlaps a projection of the fifth heat conduction layer, a projection of the first conductive member 24 overlaps a projection of the fifth heat conduction layer, and the welding portion 213a, the first conductive member 24, and the second conductive sheet 71 are fixed, insulated, and heat-conducted by the fifth heat conduction layer.

In one embodiment, the fifth thermally conductive layer is formed by pouring an insulating material into the battery pack 100 and then curing the insulating material. Optionally, the fifth heat conduction layer includes at least one of a potting adhesive and a foaming adhesive. Optionally, the fifth heat conduction layer is formed by pouring the potting adhesive into the battery pack 100 and then curing the potting adhesive. Optionally, the fifth heat conduction layer is formed by foaming glue. Optionally, the fifth heat conductive layer includes a resin, and after the resin is heated and melted, the flowable resin is disposed between the second insulating member 80 and the second interposer 70 by means of pouring, and then is cured. Alternatively, the fifth thermally conductive layer is formed by applying a flowable resin between the second insulator 80 and the second interposer 70 by an injection molding process and then curing the flowable resin. The fifth heat conduction layer fills the gap between the second insulating member 80 and the second interposer 70, thereby enhancing the insulation protection of the second insulating member 80 and the second interposer 70 and preventing foreign materials such as water and dust from entering between the second insulating member 80 and the second interposer 70.

In one embodiment, the first connection member 30 is disposed on a side of the second insulation member 80 facing away from the second interposer 70, and heat of the electrode terminal 213 is transferred to the fifth heat conduction layer through the fourth heat conduction layer and is transferred from the fifth heat conduction layer to the first connection member 30. Optionally, a sixth heat conduction layer (not shown) is disposed between the second insulating member 80 and the first connection member 30, heat of the electrode terminal 213 is transferred to the fifth heat conduction layer through the fourth heat conduction layer, then is transferred to the sixth heat conduction layer from the fifth heat conduction layer, and is transferred to the first connection member 30 through the sixth heat conduction layer, and then is dissipated to the second row of the electric core group 20b through the first connection member 30, and by adding the sixth heat conduction layer, efficiency of transferring heat of the electric core 21 to the first connection member 30 can be improved. Optionally, the sixth thermally conductive layer includes a thermally conductive paste.

In one embodiment, the second body 81 is provided with a second through hole 81a, and the second through hole 81a penetrates through the second body 81. The flowing heat conductive insulating material flows between the second insulating member 80 and the first connecting member 30 through the second through hole 81 a. In one embodiment, the insulating material of the sixth thermal conductive layer is cured after being poured into the battery pack 100. Optionally, the sixth heat conducting layer includes at least one of a potting adhesive and a foaming adhesive. Optionally, the sixth thermal conductive layer is formed by pouring a potting adhesive into the battery pack 100 and then curing the potting adhesive. Optionally, the sixth heat conducting layer is formed by foaming glue. Optionally, the sixth thermally conductive layer includes a resin, and after the resin is heated and melted, the flowable resin is disposed between the second insulating member 80 and the first connecting member 30 by means of pouring and then cured. Optionally, the sixth thermal conductive layer is formed by disposing a flowable resin between the second insulating member 80 and the first connecting member 30 by an injection molding process and then curing the flowable resin, and the sixth thermal conductive layer fills a gap between the second insulating member 80 and the first connecting member 30, so that insulation protection of the second insulating member 80 and the first connecting member 30 is enhanced, and foreign substances such as water and dust are prevented from entering between the second insulating member 80 and the first connecting member 30.

In one embodiment, the fourth thermally conductive layer, the fifth thermally conductive layer, and the sixth thermally conductive layer are formed from the same material cure. A fast-setting insulating material, such as a quick-drying glue or a foaming glue, which can be cured quickly, is first injected into the eighth opening 811, the ninth opening 813 and the tenth opening 815, and the insulating material is restricted from flowing to other positions of the second body 81 by the fourth protrusion 812, the fifth protrusion 814 and the sixth protrusion 816. The cured insulating material closes the eighth opening 811, the ninth opening 813, and the tenth opening 815, and then the battery pack 100 is assembled upside down in the direction opposite to the third direction Z as shown in fig. 10, and then the flowable insulating material is injected through the potting passage, and the insulating material flows between the cell casing 211 and the second adaptor plate 70, and may flow between the second insulating member 80 and the second adaptor plate 70 through the hole of the second adaptor plate 70, and may flow between the second insulating member 80 and the first connector 30 through the second through hole 81 a. The flowable insulating material between the second insulating member 80 and the first connecting member 30 is cured to form a sixth thermal conductive layer, the flowable insulating material between the second insulating member 80 and the second adapter plate 70 is cured to form a fifth thermal conductive layer, and the flowable insulating material between the cell housing 211 and the second adapter plate 70 is cured to form a fourth thermal conductive layer. Alternatively, when the battery pack 100 is inverted, the gaps between the battery cells 21 may serve as glue filling channels. When the flowable insulating material is injected through the glue filling channel, the fourth heat conduction layer, the fifth heat conduction layer and the sixth heat conduction layer are made of the same insulating material, and the fourth heat conduction layer, the fifth heat conduction layer and the sixth heat conduction layer are formed through a one-time injection process means, so that the production is facilitated.

In one embodiment, the projection of the second through hole 81a overlaps the projection of the electrode terminal 213 along the third direction Z, so that the heat conductive and insulating material flows from the second through hole 81a into between the second insulating member 80 and the first connecting member 30.

In an embodiment, a side of the second body 81 facing the second interposer 70 is provided with a second protrusion 81b. When the second insulating member 80 is connected to the second interposer 70, the second protrusion 81b can be in contact with the second interposer 70 and supported by the second protrusion 81b, so that a gap is formed between the second insulating member 80 and the second interposer 70 for accommodating the fifth heat conducting layer. It can be understood that the size of the gap between the second insulating member 80 and the second interposer 70, and thus the amount of the fifth heat conducting layer between the second insulating member 80 and the second interposer 70, can be adjusted by adjusting the length of the second protrusion 81b along the third direction Z.

In an embodiment, the first heat conducting layer 101, the second heat conducting layer 102, the third heat conducting layer, the fifth heat conducting layer, the sixth heat conducting layer and the seventh heat conducting layer comprise a heat conducting glue and a heat conducting pad.

Referring to fig. 12, 16, 18, 19 and 20, in one embodiment, the first connecting member 30 includes a first portion 31 and a second portion 32, and the first portion 31 is connected to the second portion 32. A first passage 30a and a second connection hole 30b are provided in the first portion 31. The first passage 30a penetrates the first portion 31 in the first direction X. The first portion 31 includes a first surface 311 and a second surface 312 disposed along the second direction Y. Along the second direction Y, the projection of the first surface 311 overlaps the projection of the first row of electric core groups 20a, the projection of the second surface 312 overlaps the projection of the second row of electric core groups 20b, the heat of the first row of electric core groups 20a is conducted through the first surface 311, and the heat of the second row of electric core groups 20b is conducted through the second surface 312 for heat dissipation. Optionally, along the first direction X, the projection of the first row of electric core assemblies 20a is located in the projection of the first surface 311, and the projection of the second row of electric core assemblies 20b is located in the projection of the second surface 312, so that the side surfaces of the first row of electric core assemblies 20a and the first surface 311 can conduct heat, and the side surfaces of the second row of electric core assemblies 20b and the second surface 312 can conduct heat, thereby further improving heat dissipation.

In one embodiment, a heat conducting glue is disposed between the first portion 31 and the first row of electric core assemblies 20a, so as to conduct heat to the first connecting member 30 quickly, thereby further improving heat dissipation. In one embodiment, a heat conducting adhesive is disposed between the first portion 31 and the second row of electric core assembly 20b, so as to conduct heat to the first connecting member 30 quickly, thereby further improving heat dissipation.

In an embodiment, the first portion 31 is further provided with a second channel 30c, the second channel 30c extending through the first portion 31 in the first direction X. The first passage 30a and the second passage 30c are arranged at an interval in the third direction Z. By arranging the second channel 30c, the first channel 30a and the second channel 30c can radiate the battery cell 21 together, and the radiating efficiency is further improved. It is understood that the number of channels on the first portion 31 can be adjusted according to the heat dissipation requirement and the length of the first portion 31 in the third direction Z, and the longer the length of the first portion 31 is, the larger the number of channels can be set. It will be appreciated that as the number of passages increases, the number of openings in the first and

second housings

11, 12 also needs to increase.

In one embodiment, the second portion 32 is disposed perpendicular to the first portion 31, and the second portion 32 is disposed on a side of the first insulating member 60 facing away from the first transfer plate 50. In the third direction Z, the projection of the first conductive sheet 52 and the projection of the first through hole 61a are both located within the projection of the second portion 32. Optionally, a third heat conduction layer is disposed between the second portion 32 and the first main body 61, heat of the first row of electric core assemblies 20a is conducted to the second portion 32 through the third heat conduction layer, the second portion 32 is conducted to the first portion 31, and heat on the first portion 31 is taken away by air flowing in the first channel 30a, so that heat dissipation of the first row of electric core assemblies 20a is achieved.

In an embodiment, a first notch 321 is formed on a side of the second portion 32 connected to the first portion 31, and the first conductive member 24 is connected to the first conductive sheet 52 through the first notch 321.

In an embodiment, the first connector 30 further comprises a third portion 33, the third portion 33 being connected to the first portion 31. The third portion 33 is perpendicular to the first portion 31. The third portion 33 is provided on a side of the second insulating member 80 facing away from the second interposer 70. Along the third direction Z, the projection of the second conductive sheet 71 and the projection of the second through hole 81a are both located within the projection of the third portion 33. Optionally, the sixth heat conduction layer is disposed between the third portion 33 and the second main body 81, the heat of the second row of electric core assemblies 20b is conducted to the third portion 33 through the sixth heat conduction layer, the third portion 33 is conducted to the first portion 31, and the air flowing through the first channel 30a takes away the heat on the first portion 31, so as to dissipate the heat of the second row of electric core assemblies 20b.

In one embodiment, a second notch 331 is formed at a side of the third portion 33 connected to the first portion 31, and the first conductive member 24 is connected to the second conductive sheet 71 through the second notch 331. When the first conductive member 24 connects the first conductive sheet 52 and the second conductive sheet 71, the first portion 31 is partially located in the second recess 241 as viewed in the first direction X.

In one embodiment, the first portion 31, the second portion 32, and the third portion 33 are a unitary structure.

Referring to fig. 21, 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 used as limitations of the present application, and that suitable modifications and variations of 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

1. A battery pack, comprising:

a first housing having a first space;

an electric core assembly accommodated in the first space;

and a second housing having a second space, the first housing being accommodated in the second space, the second housing being provided with a first hole penetrating the second housing, the first housing being exposed from the first hole.

2. The battery pack of claim 1, further comprising a bracket and a third housing, the bracket being positioned between the third housing and the first housing, the third housing enclosing the first housing, the bracket, the third housing and the first housing being fixedly attached.

3. The battery pack of claim 2 wherein said first housing is provided with a seal at an edge thereof connected to said frame, said frame fixedly connected to said second housing and connected to said seal.

4. The battery of claim 3, wherein said seal member is provided with a groove, and a portion of said first housing is provided in said groove.

5. The battery of claim 3, wherein a first adhesive layer is disposed between the first housing and the seal, and a second adhesive layer is disposed between the seal and the bracket and between the seal and the second housing.

6. The battery of claim 3, wherein the seal comprises a first seal portion, a second seal portion, and a third seal portion, the first seal portion connecting the inner surface of the first housing, the second seal portion connecting the outer surface of the first housing, the third seal portion connecting the first seal portion and the second seal portion, the third seal portion connecting the bracket and the end surface of the first housing facing the bracket.

7. The battery pack according to claim 6, wherein the second case is provided with a first recess, and the second seal portion is provided in the first recess.

8. The battery pack according to claim 6, wherein the bracket includes a first region, and the first sealing part and the first region are arranged in a first direction, and the first sealing part connects the first region and the first case.

9. The battery pack according to claim 8, wherein the bracket includes a second region connecting the first region, the second region and a third sealing part being arranged in a line along a third direction, the third sealing part connecting the second region and the first housing, the third direction being perpendicular to the first direction.

10. The battery of claim 1, wherein the first housing defines a first opening and a second opening, wherein the first housing defines a first connector therein, wherein the first connector defines a first passage connecting the first opening and the second opening, wherein the second housing defines a third opening and a fourth opening, wherein the third opening communicates with the first opening, and wherein the fourth opening communicates with the second opening.

11. The battery pack according to claim 1, wherein the second case includes a second wall, a fifth side wall, a sixth side wall, a seventh side wall, and an eighth side wall, the second wall connects the fifth side wall, the sixth side wall, the seventh side wall, and the eighth side wall and forms the second space, and at least one of the second wall, the fifth side wall, the sixth side wall, the seventh side wall, and the eighth side wall is provided with the first hole.

12. An electrical consumer, characterized in that it comprises a battery as claimed in any one of claims 1 to 11.