Battery pack and electric equipment

Abstract

The utility model discloses a battery pack and electric equipment. The battery pack comprises a shell, a battery cell assembly and a radiator, the battery cell assembly is arranged in the shell and comprises a first battery cell group and a second battery cell group; the heat radiator is arranged between the first battery cell group and the second battery cell group, the heat radiator comprises a heat radiation channel communicated with the outside of the battery pack, the heat radiator comprises a first heat radiation piece and a second heat radiation piece, and the first heat radiation piece is connected with the second heat radiation piece to form the heat radiation channel.

Description

Technical Field

[0001] This application relates to the field of energy storage technology, and more particularly to a battery pack and an electrical device. Background Technology

[0002] Battery packs are currently widely used in drones, electric vehicles, and smart energy storage devices. During operation, battery packs generate a significant amount of heat, necessitating heat dissipation to prevent overheating. Utility Model Content

[0003] In view of this, it is necessary to provide a battery pack and electrical equipment that facilitates heat dissipation from the battery pack.

[0004] Embodiments of this application provide a battery pack, including a housing, a cell assembly, and a heat sink. The cell assembly is disposed within the housing and includes a first cell group and a second cell group. The heat sink is disposed between the first cell group and the second cell group, and includes a heat dissipation channel communicating with the outside of the battery pack. The heat sink includes a first heat dissipation element and a second heat dissipation element, with the first heat dissipation element connected to the second heat dissipation element to form a heat dissipation channel, which is beneficial for heat dissipation of the battery pack.

[0005] In one or more of the above optional embodiments, the battery pack includes a first seal and a first fastener. The first seal is located between the first heat sink and the second heat sink and connects the first heat sink and the second heat sink. The first fastener fixes the first heat sink and the second heat sink, which is beneficial for sealing.

[0006] In one or more of the above optional embodiments, the battery pack includes a second seal and a third seal, and the housing includes a first sidewall and a second sidewall arranged along a first direction. The second seal connects the first sidewall and the heat sink, and the third seal connects the second sidewall and the heat sink, which facilitates the sealing between the heat sink and the second sidewall.

[0007] In one or more of the above optional embodiments, the first battery cell group and the second battery cell group are arranged along the second direction, and the heat sink is defined to have an axis along the third direction. The first heat sink and the second heat sink are arranged symmetrically about the axis. The first direction, the second direction and the third direction are perpendicular to each other, which facilitates assembly and reduces the possibility of assembly errors.

[0008] In one or more of the above optional embodiments, the first battery cell group includes a plurality of first battery cells, and the first heat sink has a first recess, with a portion of each first battery cell disposed in the first recess. The second battery cell group includes a plurality of second battery cells, and the second heat sink has a second recess, with a portion of each second battery cell disposed in the second recess.

[0009] In one or more of the above optional embodiments, the first heat sink includes a first heat sink fin, the second heat sink includes a second heat sink fin, the first heat sink fin and the second heat sink fin are located in the heat dissipation channel, the first heat sink fin and the second heat sink fin are separated, which facilitates the passage of air through the heat dissipation channel and improves heat dissipation.

[0010] In one or more of the above optional embodiments, the first heat sink includes a first surface and a second surface disposed along a second direction, a first recess is formed on the first surface, and a first protrusion is formed on the second surface. A first heat sink fin connects to the first protrusion, which facilitates enhanced heat dissipation. Alternatively, the second heat sink includes a third surface and a fourth surface disposed along a second direction, a second recess is formed on the fourth surface, and a second protrusion is formed on the third surface. A second heat sink fin connects to the second protrusion, which also facilitates enhanced heat dissipation.

[0011] In one or more of the above optional embodiments, the battery pack includes an adhesive member. A first heat sink, a second heat sink, and a first sidewall form a third recess, and the adhesive member is disposed in the third recess and adheres to the first heat sink, the second heat sink, and the first sidewall, which helps improve sealing performance. Alternatively, the first heat sink, the second heat sink, and the second sidewall form a fourth recess, and the adhesive member is disposed in the fourth recess and adheres to the first heat sink, the second heat sink, and the second sidewall, which also helps improve sealing performance.

[0012] In one or more of the above optional embodiments, the battery pack includes a connector and a potting resin. The connector includes a first space, in which portions of a first cell group and a second cell group are located. The potting resin is disposed in the first space and bonds the first cell group, the second cell group, and the connector. The heat sink includes a first through-hole, and the housing includes a second through-hole. The second through-hole and the first through-hole are configured to fill the first space with potting resin, thereby enhancing the sealing and insulation protection of the electrode terminals and further enhancing the sealing and insulation protection of the battery pack.

[0013] In one or more of the above optional embodiments, a plurality of first heat dissipation fins are spaced apart along a third direction and extend along a first direction, which is beneficial for heat dissipation.

[0014] In one or more of the above optional embodiments, a plurality of second heat dissipation fins are spaced apart along a third direction and extend along a first direction, which is beneficial for heat dissipation.

[0015] Embodiments of this application provide an electrical device including the battery pack in any of the above embodiments. Attached Figure Description

[0016] Figure 1 Schematic diagrams of the battery pack structure are shown in some embodiments.

[0017] Figure 2An exploded schematic diagram of the battery pack in some embodiments is shown.

[0018] Figure 3 An exploded schematic diagram of a portion of the battery pack in some embodiments is shown.

[0019] Figure 4 A schematic diagram of the inverted configuration of the housing and heat sink is shown in some embodiments.

[0020] Figure 5 Some embodiments are shown. Figure 4 Enlarged diagram of point A in the middle.

[0021] Figure 6 Schematic diagrams of the heat sink and seals in some embodiments are shown.

[0022] Figure 7 Schematic diagrams of the heat sink in some embodiments are shown.

[0023] Figure 8 A partial structural schematic diagram of the inverted connector and the first heat sink is shown in some embodiments.

[0024] Figure 9 Schematic diagrams of electrical equipment in some embodiments are shown.

[0025] Explanation of key component symbols:

[0026] Battery pack 100

[0027] Casing 10

[0028] First side wall 11

[0029] First opening 111

[0030] Second sidewall 12

[0031] Second opening 121

[0032] Third side wall 13

[0033] Fourth sidewall 14

[0034] Bottom wall 15

[0035] Top cover 16

[0036] Battery cell assembly 20

[0037] Cell 21

[0038] First cell group 201

[0039] First cell 201a

[0040] Second cell group 202

[0041] Second battery cell 202a

[0042] Cell casing 211

[0043] Electrode terminal 212

[0044] Radiator 30

[0045] Heat dissipation channel 30a

[0046] First heat sink 31

[0047] First Main Wall 311

[0048] First surface 311a

[0049] Second surface 311b

[0050] Second heat sink 32

[0051] Second Main Wall 321

[0052] Third surface 321a

[0053] Fourth surface 321b

[0054] first recess 31a

[0055] First heat sink fin 31b

[0056] First protrusion 31c

[0057] First fixing part 31d

[0058] Second recess 32a

[0059] Second heat sink 32b

[0060] Second convex portion 32c

[0061] Second fixing part 32d

[0062] First Wall 312

[0063] Second Wall 322

[0064] First extension wall 313

[0065] Second extension wall 323

[0066] First fixing hole 313a

[0067] Second fixing hole 323a

[0068] Third extension wall 314

[0069] Fourth extension wall 315

[0070] Fifth Extension Wall 324

[0071] Sixth Extension Wall 325

[0072] Third recess 301

[0073] Fourth recess 302

[0074] First through hole 310

[0075] Adhesive component 40

[0076] First circuit board 50

[0077] Connector 60

[0078] First Space 61

[0079] First limiting part 62

[0080] Second limiting part 63

[0081] Third limiting part 64

[0082] Encapsulating resin 70

[0083] Second circuit board 80

[0084] Connector 81

[0085] First sealing element 101

[0086] First fastener 102

[0087] Second seal 103

[0088] Third seal 104

[0089] Third fixing part 105

[0090] Fourth fixing part 106

[0091] Second fastener 107

[0092] Sealing part 108

[0093] Second through hole 110

[0094] First electrical connector 120

[0095] Second electrical connector 130

[0096] Conductive component 140

[0097] First filler 150

[0098] Second filler 160

[0099] Third filler 170

[0100] 200 electrical appliances

[0101] First direction X

[0102] Second direction Y

[0103] Third direction Z

[0104] The following specific embodiments will further illustrate this application in conjunction with the above-described accompanying drawings. Detailed Implementation

[0105] The technical solutions of the embodiments of this application will be described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments.

[0106] When a component is considered to be "located" on another component, it can be directly on the other component or may also be interspersed with other components. When a component is considered to be "connected" to another component, it can be directly connected to the other component or may also be interspersed with other components.

[0107] Unless otherwise defined, 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 specification of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "or / and" as used herein includes any and all combinations of one or more of the associated listed items.

[0108] It is understandable that the term "perpendicular" is used to describe an ideal state between two components. In actual production or use, two components can exist in a state that is approximately perpendicular or equal to each other. For example, in numerical terms, perpendicularity can refer to the angle between two straight lines within the range of 90° ± 10°, the dihedral angle between two planes within the range of 90° ± 10°, or the angle between a straight line and a plane within the range of 90° ± 10°. The two components described as "perpendicular" do not have to be absolutely straight lines or planes; they can be approximately straight lines or planes. From a macroscopic perspective, if the overall direction of extension is straight or plane, the component can be considered a "straight line" or "plane".

[0109] Unless otherwise defined, the term "multiple" in this document, when used to describe the number of components, specifically means that the component is two or more.

[0110] The following detailed description of some embodiments of this application is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0111] Please see Figures 1 to 4 The first embodiment of this application provides a battery pack 100, including a housing 10 and a cell assembly 20, wherein the cell assembly 20 is disposed inside the housing 10.

[0112] In some embodiments, the battery cell assembly 20 includes a first battery cell group 201 and a second battery cell group 202.

[0113] In some embodiments, the battery pack 100 includes a heat sink 30 disposed between the first cell group 201 and the second cell assembly 202. The heat sink 30 includes a heat dissipation channel 30a communicating with the outside of the battery pack 100.

[0114] In some embodiments, the heat sink 30 includes a first heat sink 31 and a second heat sink 32. The first heat sink 31 is connected to the second heat sink 32 and forms a heat dissipation channel 30a, which is beneficial for heat dissipation of the battery pack 100.

[0115] Please see Figure 2 In some embodiments, the housing 10 includes a first sidewall 11, a second sidewall 12, a third sidewall 13, a fourth sidewall 14, a bottom wall 15, and a top cover 16. The first sidewall 11 and the second sidewall 12 are arranged along a first direction X, the third sidewall 13 and the fourth sidewall 14 are arranged along a second direction Y, and the top cover 16 and the bottom wall 15 are arranged along a third direction Z. The first sidewall 11 connects to the third sidewall 13 and the fourth sidewall 14, the second sidewall 12 connects to the third sidewall 13 and the fourth sidewall 14, the bottom wall 15 connects to the first sidewall 11, the second sidewall 12, the third sidewall 13, and the fourth sidewall 14, and the top cover 16 connects to the first sidewall 11, the second sidewall 12, the third sidewall 13, and the fourth sidewall 14, forming a receiving space. The battery cell assembly 20 and the heat sink 30 are disposed in the receiving space. The first direction X, the second direction Y, and the third direction Z are perpendicular to each other.

[0116] In some embodiments, the first sidewall 11 is provided with a first opening 111, and the second sidewall 12 is provided with a second opening 121. The radiator 30 communicates with the outside of the battery pack 100 through the first opening 111 and the second opening 121.

[0117] Please see Figure 3 In some embodiments, the first cell group 201 includes a plurality of first cells 201a stacked along a first direction X, and the second cell assembly 202 includes a plurality of second cells 202a stacked along the first direction X. The first cell group 201 and the second cell group 202 are arranged along a second direction Y. The first direction X is the thickness direction of the cell 21. Both the first cell 201a and the second cell 202a include electrode terminals 212.

[0118] In some embodiments, the first cell 201a includes a pouch cell, and the second cell 202a includes a pouch cell.

[0119] Please see Figures 5 to 7 In some embodiments, the first heat sink 31 is provided with a first recess 31a, and a portion of each first cell 201a is provided in the first recess 31a.

[0120] In some embodiments, the first heat sink 31 has a plurality of first recesses 31a, and a portion of each first battery cell 201a is disposed in one first recess 31a. In other embodiments, portions of multiple first battery cells 201a are disposed in one first recess 31a, for example, portions of two first battery cells 201a are disposed in one first recess 31a. Or, a portion of each first battery cell 201a is disposed in one first recess 31a.

[0121] In some embodiments, the second heat sink 32 is provided with a second recess 32a, and a portion of each second cell 202a is disposed in the second recess 32a.

[0122] In some embodiments, the second heat sink 32 is provided with a plurality of second recesses 32a, and a portion of each second battery cell 202a is disposed in one second recess 32a. In other embodiments, portions of a plurality of second battery cells 202a are disposed in one second recess 32a, for example, portions of two second battery cells 202a are disposed in one second recess 32a. Or, a portion of each second battery cell 202a is disposed in one second recess 32a.

[0123] Please see Figures 5 to 7 In some embodiments, the first heat sink 31 includes a first heat sink fin 31b, and the second heat sink 32 includes a second heat sink fin 32b. The first heat sink fin 31b and the second heat sink fin 32b are located in the heat dissipation channel 30a. The first heat sink fin 31b and the second heat sink fin 32b are separated, which facilitates the passage of air through the heat dissipation channel 30a and improves heat dissipation.

[0124] In some embodiments, a plurality of first heat dissipation fins 31b are spaced apart along a third direction Z and extend along a first direction X, which is beneficial for heat dissipation.

[0125] In some embodiments, a plurality of second heat dissipation fins 32b are spaced apart along a third direction Z and extend along a first direction X, which is beneficial for heat dissipation.

[0126] Please see Figures 5 to 7 In some embodiments, the first heat sink 31 includes a first surface 311a and a second surface 311b disposed along the second direction Y. A first recess 31a is formed on the first surface 311a, and a first protrusion 31c is formed on the second surface 311b. The first heat sink fins 31b are connected to the first protrusion 31c, which is beneficial to enhance heat dissipation.

[0127] In some embodiments, the first heat sink 31 includes a first main wall 311, and a first surface 311a and a second surface 311b are located on the first main wall 311.

[0128] In some embodiments, the second heat sink 32 includes a third surface 321a and a fourth surface 321b disposed along the second direction Y, a second recess 32a is formed on the fourth surface 321b, and a second protrusion 32c is formed on the third surface 321a. The second heat sink fins 32b are connected to the second protrusion 32c, which is beneficial to enhance heat dissipation.

[0129] In some embodiments, the second heat sink 32 includes a second main wall 321, and the first main wall 311 and the second main wall 321 are spaced apart along a first direction X. A third surface 321a and a fourth surface 321b are located on the second main wall 321.

[0130] Please see Figures 5 to 7 In some embodiments, the battery pack 100 includes a first seal 101 and a first fastener 102. The first seal 101 is located between the first heat sink 31 and the second heat sink 32, connecting the first heat sink 31 and the second heat sink 32. The first fastener 102 secures the first heat sink 31 and the second heat sink 32. Clamping the first seal 101 between the first heat sink 31 and the second heat sink 32 using the first fastener 102 facilitates sealing. Optionally, the first seal 101 may include, but is not limited to, foam or silicone gaskets.

[0131] Please see Figures 5 to 7 In some embodiments, the first heat sink 31 includes two first walls 312 arranged along the third direction Z, and the two first walls 312 are connected to the first main wall 311.

[0132] In some embodiments, the first heat sink 31 includes two first extension walls 313 facing the second heat sink 32, each first extension wall 313 being connected to a first wall 312. The first extension wall 313 is provided with a first fixing hole 313a.

[0133] In some embodiments, the first heat sink 31 includes a first fixing portion 31d, which connects the first wall 312 and the first extension wall 313.

[0134] In some embodiments, the second heat sink 32 includes two second walls 322, which are arranged along a third direction Z and are connected to the second main wall 321.

[0135] In some embodiments, the second heat sink 32 includes two second extension walls 323 facing the first heat sink 31, each second extension wall 323 being connected to a second wall 322. The second extension wall 323 is provided with a second fixing hole 323a.

[0136] In some embodiments, the second heat sink 32 includes a second fixing portion 32d, which is connected to the second wall 322 and the second extension wall 323.

[0137] In some embodiments, the first seal 101 is located between the first extension wall 313 and the second extension wall 323. See also... Figure 6 The battery pack 100 includes two first seals 101, and a first seal 101 is provided between the first extension wall 313 and the second extension wall 323.

[0138] Please see Figure 6 In some embodiments, the battery pack 100 includes two first seals 101, one of which is a first fastener 102 passing through a first fixing hole 313a and connected to a second fixing part 32d, and the other is a first fastener 102 passing through a second fixing hole 323a and connected to a first fixing part 31d, thereby fixing the first heat sink 31 and the second heat sink 32 and forming a heat sink 30.

[0139] Please see Figures 5 to 7 In some embodiments, the battery pack 100 includes a second seal 103, a first sidewall 11 and a heat sink 30 arranged along a first direction X, the heat sink 30 being connected to the first sidewall 11, and the second seal 103 connecting the first sidewall 11 and the heat sink 30, which facilitates sealing between the heat sink 30 and the first sidewall 11. Optionally, the second seal 103 includes, but is not limited to, foam or silicone gaskets.

[0140] In some embodiments, the battery pack 100 includes a third seal 104, a heat sink 30 and a second sidewall 12 arranged along a first direction X, the heat sink 30 being connected to the second sidewall 12, and the third seal 104 connecting the second sidewall 12 and the heat sink 30, thereby facilitating a seal between the heat sink 30 and the second sidewall 12. Optionally, the third seal 104 includes, but is not limited to, foam or silicone gaskets.

[0141] In some embodiments, the first heat sink 31 includes a third extension wall 314 and a fourth extension wall 315 arranged along a first direction X. The third extension wall 314 connects the first main wall 311, the first wall 312 and the first extension wall 313. The fourth extension wall 315 connects the first main wall 311, the first wall 312 and the first extension wall 313.

[0142] In some embodiments, the second heat sink 32 includes a fifth extension wall 324 and a sixth extension wall 325 arranged along a first direction X. The fifth extension wall 324 connects the second main wall 321, the second wall 322 and the second extension wall 323. The sixth extension wall 325 connects the second main wall 321, the second wall 322 and the second extension wall 323.

[0143] In some embodiments, when the first heat sink 31 is connected to the second heat sink 32, the third extension wall 314 is connected to the fifth extension wall 324 and forms the first connecting wall, the second seal 103 is connected between the first side wall 11 and the first connecting wall.

[0144] In some embodiments, when the first heat sink 31 is connected to the second heat sink 32, the fourth extension wall 315 is connected to the sixth extension wall 325 and forms a second connecting wall, and the third seal 104 is connected between the second side wall 12 and the second connecting wall.

[0145] In some embodiments, the radiator 30 includes a plurality of third fixing parts 105, some of which are connected to the first main wall 311 and the third extension wall 314, and some of which are connected to the first main wall 311 and the fourth extension wall 315.

[0146] In some embodiments, the radiator 30 includes a plurality of fourth fixing portions 106, some of which are connected to the second main wall 321 and the fifth extension wall 324, and some of which are connected to the second main wall 321 and the sixth extension wall 325.

[0147] In some embodiments, the battery pack 100 includes a plurality of second fasteners 107, which fix the first sidewall 11 and the third fixing part 105, and clamp the second seal 103. The second fasteners 107 fix the second sidewall 12 and the third fixing part 105, connect the second side, and clamp the third seal 104 to enhance the sealing effect.

[0148] Please see Figure 5 In some embodiments, the battery pack 100 includes an adhesive member 40. A first heat sink 31, a second heat sink 32, and a first sidewall 11 form a third recess 301. The adhesive member 40 is disposed in the third recess 301 and adheres to the first heat sink 31, the second heat sink 32, and the first sidewall 11, which helps to improve sealing. Optionally, the adhesive member 40 adheres to the first extension wall 313, the second extension wall 323, and the first sidewall 11.

[0149] In some embodiments, the first heat sink 31, the second heat sink 32, and the second sidewall 12 form a fourth recess 302. An adhesive 40 is disposed in the fourth recess 302 and adheres to the first heat sink 31, the second heat sink 32, and the second sidewall 12, which helps improve sealing. Optionally, the adhesive 40 adheres to the first extension wall 313, the second extension wall 323, and the second sidewall 12.

[0150] In some embodiments, the heat sink 30 is defined to have an axis along the third direction Z, and the first heat sink 31 and the second heat sink 32 are arranged symmetrically about this axis, which facilitates assembly and reduces the possibility of assembly errors.

[0151] Please see Figure 3 In some embodiments, the battery pack 100 includes a first circuit board 50 connected to electrode terminals 212.

[0152] Optionally, the first circuit board 50 includes a BMS (Battery Management System) component, which includes multiple electronic components that can perform functions such as control, protection, communication, power calculation, signal transmission, and power transmission of the battery cell 21.

[0153] Optionally, the first circuit board 50 includes a flexible printed circuit board (FPC). Optionally, the first circuit board 50 includes a printed circuit board (PCB).

[0154] Please see Figure 2 In some embodiments, the battery pack 100 includes a second circuit board 80, which includes a connector 81 for connection to an electrical device.

[0155] The second circuit board 80 includes a BMS (Battery Management System) component, which includes multiple electronic components that can perform functions such as control, protection, communication, power calculation, signal transmission, and power transmission of the battery cell 11.

[0156] Optionally, the second circuit board 80 includes a flexible printed circuit board (FPC). Optionally, the second circuit board 80 includes a printed circuit board (PCB).

[0157] In some embodiments, the battery pack 100 includes a first electrical connector 120 and a second electrical connector 130, which are connected to a first circuit board 50 and a second circuit board 80 to realize the input or output of electrical energy.

[0158] In some embodiments, the battery pack 100 includes a conductive component 140 configured to transmit electrical signal information of the battery cell 21. The conductive component 140 is connected to a first circuit board 50 and a second circuit board 80.

[0159] Please see Figure 3 and Figure 8 In some embodiments, the battery pack 100 includes a connector 60, which includes a first space 61, with portions of the first cell pack 201 and the second cell pack 202 located in the first space 61.

[0160] In some embodiments, the battery pack 100 includes a potting resin 70 disposed in a first space 61, and the potting resin 70 bonds the first cell group 201, the second cell group 202 and the connector 60.

[0161] In some embodiments, potting resin 70 is disposed in the gap between electrode terminal 212 and connector 60 to enhance the sealing and insulation protection of electrode terminal 212, thereby enhancing the sealing and insulation protection of battery pack 100.

[0162] In some embodiments, the heat sink 30 includes a first through hole 310, and the housing 10 includes a second through hole 110. The second through hole 110 and the first through hole 310 are configured to fill the first space 61 with potting resin 70.

[0163] In some embodiments, at least one of the first heat sink 31 and the second heat sink 32 is provided with a first through hole 310. Optionally, the first heat sink 31 is provided with a first through hole 310, which penetrates through a third extension wall 314 along a first direction X. Optionally, the second heat sink 32 is provided with a first through hole 310, which penetrates through a sixth extension wall 325 along a first direction X.

[0164] In some embodiments, the second through hole 110 extends through the first sidewall 11 and / or the second sidewall 12 along the first direction X.

[0165] In some embodiments, the battery pack 100 includes a sealing portion 108. After the potting resin 70 is poured into the first space 61, the sealing portion 108 connects the second through hole 110 and the first through hole 310 to seal the second through hole 110 and the first through hole 310.

[0166] In some embodiments, the potting resin 70 is configured to be cured as a first insulating material. This is achieved by curing the first insulating material after it has been disposed within the first recess 701.

[0167] In some embodiments, the first insulating material includes, but is not limited to, polyurethane adhesive, epoxy adhesive, and silicone. Optionally, the first insulating material includes potting compound. Optionally, the first insulating material includes expanding foam.

[0168] In some embodiments, the connector 60 includes a first limiting portion 62 from which the conductive component 140 extends.

[0169] In some embodiments, the battery pack 100 includes a first filler 150, at least a portion of which is disposed in the gap between the conductive component 140 and the first limiting portion 62, to seal and insulate the conductive component 140. The first filler 150 is configured to be formed by curing a second insulating material disposed in the gap between the conductive component 140 and the first limiting portion 62.

[0170] In some embodiments, the second insulating material includes one of polyurethane adhesive, epoxy adhesive, and silicone adhesive. Optionally, the second insulating material includes a fast-drying adhesive.

[0171] In some embodiments, the connector 60 includes a second limiting portion 63 from which the first electrical connector 120 extends.

[0172] In some embodiments, the battery pack 100 includes a second filler 160, at least a portion of which is disposed in the gap between the first electrical connector 120 and the second limiting portion 63, to seal and insulate the first electrical connector 120. The second filler 160 is configured to be formed by curing a third insulating material disposed in the gap between the first electrical connector 120 and the second limiting portion 63.

[0173] In some embodiments, the third insulating material includes one of polyurethane adhesive, epoxy adhesive, and silicone adhesive. Optionally, the third insulating material includes a fast-drying adhesive.

[0174] In some embodiments, the connector 60 includes a third limiting portion 64 from which the second electrical connector 130 extends.

[0175] In some embodiments, the battery pack 100 includes a third filler 170, at least a portion of which is disposed in the gap between the second electrical connector 130 and the third limiting portion 64, to seal and insulate the second electrical connector 130. The third filler 170 is configured to be formed by curing a fourth insulating material disposed in the gap between the second electrical connector 130 and the third limiting portion 64.

[0176] In some embodiments, the fourth insulating material includes one of polyurethane adhesive, epoxy adhesive, and silicone adhesive. Optionally, the fourth insulating material includes a fast-drying adhesive.

[0177] Please see Figure 3 and Figure 8 In some embodiments, a first filler 150 is first disposed in the gap between the conductive component 140 and the first limiting part 62, a second filler 160 is disposed in the gap between the first electrical connector 120 and the second limiting part 63, and a third filler 170 is disposed in the gap between the second electrical connector 130 and the third limiting part 64. After the first filler 150, the second filler 160 and the third filler 170 have cured, the battery pack 100 is placed upside down, and potting resin 70 is injected into the first space 61 through the second through hole 110 and the first through hole 310.

[0178] Please see Figure 9 This application provides an electrical device 200 employing the aforementioned battery pack 100. In one embodiment, the electrical device 200 may be, but is not limited to, electronic devices, drones, backup power supplies, electric vehicles, electric motorcycles, electric-assisted bicycles, power tools, large household battery modules, etc.

[0179] Those skilled in the art should recognize that the above embodiments are merely illustrative of this application and are not intended to limit this application. Any appropriate changes and variations made to the above embodiments within the spirit and essence of this application fall within the scope of this application's disclosure.

Claims

1. A battery pack, characterized in that, include: case; A battery cell assembly is disposed within the housing, and the battery cell assembly includes a first battery cell group and a second battery cell group; A heat sink is disposed between the first battery cell group and the second battery cell group. The heat sink includes a heat dissipation channel communicating with the outside of the battery group. The heat sink includes a first heat dissipation component and a second heat dissipation component. The first heat dissipation component is connected to the second heat dissipation component and forms the heat dissipation channel.

2. The battery pack as described in claim 1, characterized in that, The battery pack includes a first seal and a first fastener. The first seal is located between the first heat sink and the second heat sink and connects the first heat sink and the second heat sink. The first fastener fixes the first heat sink and the second heat sink.

3. The battery pack as described in claim 1 or 2, characterized in that, The battery pack includes a second seal and a third seal. The housing includes a first sidewall and a second sidewall arranged along a first direction. The second seal connects the first sidewall and the heat sink, and the third seal connects the second sidewall and the heat sink.

4. The battery pack as described in claim 3, characterized in that, The first and second battery cell groups are arranged along a second direction. The heat sink is defined to have an axis along a third direction. The first and second heat sinks are arranged symmetrically about the axis. The first direction, the second direction, and the third direction are perpendicular to each other.

5. The battery pack according to any one of claims 1 to 4, characterized in that, The first battery cell group includes a plurality of first battery cells, and the first heat sink is provided with a first recess, with a portion of each first battery cell disposed in the first recess; The second battery cell assembly includes a plurality of second battery cells, and the second heat sink has a second recess, with a portion of each second battery cell disposed in the second recess.

6. The battery pack as described in claim 5, characterized in that, The first heat sink includes a first heat sink fin, and the second heat sink includes a second heat sink fin. The first heat sink fin and the second heat sink fin are located in the heat dissipation channel and are separated from each other.

7. The battery pack as described in claim 6, characterized in that, The first heat sink includes a first surface and a second surface disposed along a second direction, the first recess is formed on the first surface and a first protrusion is formed on the second surface, and the first heat sink fins are connected to the first protrusion. Alternatively, the second heat sink includes a third surface and a fourth surface disposed along a second direction, the second recess is formed on the fourth surface, and a second protrusion is formed on the third surface, the second heat sink fins being connected to the second protrusion.

8. The battery pack as described in claim 3, characterized in that, The battery pack includes adhesive components; The first heat sink, the second heat sink, and the first sidewall form a third recess, and the adhesive is disposed in the third recess and adhesively bonds the first heat sink, the second heat sink, and the first sidewall. Alternatively, the first heat sink, the second heat sink, and the second sidewall form a fourth recess, and the adhesive is disposed in the fourth recess and adheres to the first heat sink, the second heat sink, and the second sidewall.

9. The battery pack according to any one of claims 1 to 8, characterized in that, The battery pack includes a connector and a potting resin. The connector includes a first space, in which a portion of the first cell group and a portion of the second cell group are located. The potting resin is disposed in the first space, and the potting resin bonds the first battery cell assembly, the second battery cell assembly, and the connector. The heat sink includes a first through-hole, and the housing includes a second through-hole, the second through-hole and the first through-hole being configured to fill the first space with the potting resin.

10. An electrical appliance, characterized in that, Includes the battery pack as described in any one of claims 1 to 9.

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