Battery packs and power-consuming devices

Abstract

The present application discloses a battery pack and an electrical device, wherein the battery pack includes a first shell, a battery cell assembly, a first component, a top cover and a connector. The first shell includes a shell side wall. The battery cell assembly is disposed in the first shell. The first component is disposed in the first shell. The top cover is fixedly connected to the first shell, the top cover, the first component and the battery cell assembly are arranged along a first direction, and the top cover is fixedly connected to the first component. The connector is fixedly connected to the first component, and the connector is fixedly connected to the shell side wall. When the battery cell assembly expands or is subjected to other forces, the first component is fixedly connected to the connector, and the connector is fixedly connected to the shell side wall, so that the force can be transmitted to the shell side wall, thereby reducing the expansion force on the top cover, facilitating the top cover to be fixedly connected to the first shell, and reducing the risk of connection failure between the top cover and the first shell.

Description

Technical Field

[0001] The present application relates to the field of energy storage technology, and in particular to a battery pack and an electrical device. Background Art

[0002] Currently, battery packs are widely used in drones, electric vehicles, smart energy storage equipment and other fields. Battery packs will expand when in use. When the battery pack expands, the expansion force can easily affect the sealing of the battery pack. Utility Model Content

[0003] In view of this, it is necessary to provide a battery pack and an electrical device to reduce the influence of the expansion force on the sealing of the battery pack.

[0004] An embodiment of the present application provides a battery pack, including a first shell, a battery cell assembly, a first component, a top cover and a connector. The first shell includes a shell side wall. The battery cell assembly is disposed in the first shell. The first component is disposed in the first shell. The top cover is fixedly connected to the first shell, the top cover, the first component and the battery cell assembly are arranged in a first direction, and the top cover is fixedly connected to the first component. The connector is fixedly connected to the first component, and the connector is fixedly connected to the shell side wall. When the battery cell assembly expands or is subjected to other forces, the first component is fixedly connected to the connector, and the connector is fixedly connected to the shell side wall, so that the force can be transmitted to the shell side wall, thereby reducing the expansion force on the top cover, facilitating the top cover to be fixedly connected to the first shell, and reducing the risk of connection failure between the top cover and the first shell.

[0005] In one or more of the above optional embodiments, the shell side wall includes a first connecting side wall, the connecting member includes a first connecting member, the first connecting side wall and the first connecting member are arranged along the second direction, the first connecting member includes a first connecting portion located in the first shell, the first connecting portion is fixedly connected to the first connecting side wall, the first direction is perpendicular to the second direction, and the force is transmitted to the first connecting side wall to reduce the expansion force on the top cover.

[0006] In one or more optional embodiments above, the battery pack includes an adhesive component, the first connecting portion is provided with a first recess, the adhesive component is provided in the first recess, and the adhesive component fixedly connects the first connecting side wall and the first connecting portion.

[0007] In one or more optional embodiments above, the first connecting member includes a second connecting portion. The first member includes a first extending portion, and the second connecting portion and the first extending portion are arranged along a first direction. The second connecting portion is connected to the first connecting portion, and the second connecting portion is fixedly connected to the first extending portion.

[0008] In one or more optional embodiments above, the battery pack includes a first fastener and a first fastening portion, the first fastening portion protrudes from the first extending portion along the first direction, and the first fastener passes through the second connecting portion and the first extending portion and connects the first fastening portion.

[0009] In one or more optional embodiments above, the battery pack includes a second fastening portion and a second fastener, and the second fastening portion protrudes from the first extension portion in a direction opposite to the first direction. The top cover is provided with a first through hole, the second fastener is provided in the first through hole, and the second fastener is fixedly connected to the second fastening portion.

[0010] In one or more optional embodiments above, the first component includes a bottom wall and a plurality of side walls, the side walls are connected to the bottom wall, the plurality of side walls include a first side wall and a second side wall arranged along the second direction, a third side wall and a fourth side wall arranged along the third direction, and the first direction, the second direction and the third direction are perpendicular to each other. The first component includes a first extension portion connected to the first side wall, the top cover is fixedly connected to the first extension portion, and the second connection portion is fixedly connected to the first extension portion.

[0011] In one or more optional embodiments above, the battery pack includes a second shell disposed in the first shell, the second shell includes a base and a first protrusion extending from the base, the base includes a receiving space, and the battery cell assembly is disposed in the receiving space. The first member includes a fourth extension portion, the fourth extension portion is connected to the fourth side wall, the fourth extension portion is fixedly connected to the first shell, and along the first direction, the fourth extension portion is connected to the first protrusion portion, which is conducive to fixing the second shell.

[0012] In one or more optional embodiments above, the battery cell assembly includes a plurality of battery cells, the plurality of battery cells are arranged along a first direction, the battery cell includes a main body and an electrode terminal, and the electrode terminal extends out of the main body. Along the first direction, the projection of the bottom wall overlaps with the projection of the main body, which is conducive to limiting the position of the battery cell, and the bottom wall can apply pressure to the battery cell.

[0013] In one or more optional embodiments above, a first end face and a first convex portion extending from the first end face are provided on the side of the shell side wall facing away from the shell bottom wall, and the thickness of the first convex portion is less than the thickness of the shell side wall. A second end face and a top cover concave portion are provided on the side of the top cover facing the shell side wall, the first convex portion is provided in the top cover concave portion, and the second end face is connected to the first end face, which can reduce the possibility of deformation at the connection between the shell side wall and the top cover, improve the connection between the first shell and the top cover, and reduce the risk of a gap between the shell side wall and the top cover, which may affect the sealing of the battery pack.

[0014] In one or more of the above optional embodiments, the battery pack includes a first seal, which is disposed in the recessed portion of the top cover, and the first protrusion abuts against the first seal, which is beneficial to improving the sealing of the battery pack.

[0015] In one or more of the above optional embodiments, the first connecting member includes a third connecting portion, which connects the first connecting portion and the second connecting portion, thereby increasing the structural strength of the first connecting member and reducing the risk of deformation of the first connecting member when subjected to expansion force.

[0016] In one or more optional embodiments above, the connecting member includes a second connecting member, the second connecting member is fixedly connected to the second extension portion, and the second connecting member and the second connecting side wall are arranged along the second direction. The second connecting member includes a fourth connecting portion located in the first shell, the fourth connecting portion is fixedly connected to the second connecting side wall, and the force can be transmitted to the second connecting side wall, thereby reducing the expansion force on the top cover, facilitating the top cover to be fixedly connected to the first shell, and reducing the risk of connection failure between the top cover and the first shell.

[0017] In one or more optional embodiments above, along the first direction, the distance h1 between the first extension portion and the first seal is greater than the distance h2 between the third extension portion and the first seal. The distance h1 between the first extension portion and the first seal is greater than the distance between the fourth extension portion and the first seal, increasing the distance between the top cover and the first extension portion to facilitate installation of the second fastening portion.

[0018] An embodiment of the present application further provides an electrical device, comprising the battery pack in any of the above embodiments.

[0019] The above-mentioned battery pack and electrical equipment, when the battery cell assembly expands or is subjected to other forces, the first component is fixedly connected by a connecting piece, and the connecting piece is fixedly connected to the side wall of the shell, which can transmit the force to the side wall of the shell, reducing the expansion force on the top cover, which is beneficial for the top cover to be fixedly connected to the first shell, and reducing the risk of failure of the connection between the top cover and the first shell. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic diagram of the structure of a battery pack in some embodiments is shown.

[0021] Figure 2 An exploded schematic diagram of a battery pack in some embodiments is shown.

[0022] Figure 3 Shows Figure 1 Schematic diagram of the cross section of a battery pack along AA.

[0023] Figure 4 Shows Figure 3 A partial enlarged schematic diagram of the .

[0024] Figure 5 A schematic structural diagram of the first component in some embodiments is shown.

[0025] Figure 6 A schematic diagram of the structure of some battery packs in some embodiments is shown.

[0026] Figure 7 A schematic structural diagram of the second shell in some embodiments is shown.

[0027] Figure 8 A schematic structural diagram of the second shell portion in some embodiments is shown.

[0028] Fig. 9 A schematic structural diagram of the first shell portion in some embodiments is shown.

[0029] Fig.10 A schematic diagram of the structure of electrical equipment in some embodiments is shown.

[0030] Description of main component symbols:

[0031] Battery Pack 100

[0032] First housing 10

[0033] first convex portion 10a

[0034] Bottom wall 11

[0035] Shell side wall 12

[0036] First end surface 12a

[0037] The first connecting side wall 121

[0038] The second connecting side wall 122

[0039] The third connecting side wall 123

[0040] Fourth connecting side wall 124

[0041] Fixing part 13

[0042] Fixing hole 131

[0043] Battery cell assembly 20

[0044] Battery 21

[0045] Main body 211

[0046] Electrode assembly 212

[0047] Electrode terminal 213

[0048] The first member 30

[0049] First connection hole 301

[0050] Second connecting hole 302

[0051] Fourth connecting hole 304

[0052] Fifth connection hole 305

[0053] Bottom wall 31

[0054] Side wall 32

[0055] First opening 30a

[0056] First side wall 321

[0057] Second side wall 322

[0058] The third side wall 323

[0059] Fourth side wall 324

[0060] The first extension portion 33

[0061] The second extension portion 34

[0062] The third extension portion 35

[0063] Fourth extension portion 36

[0064] Top cover 40

[0065] Second end surface 40a

[0066] Top cover recess 40b

[0067] First through hole 41

[0068] Connector 50

[0069] First connecting member 51

[0070] First connection portion 511

[0071] first recess 511a

[0072] Second connection portion 512

[0073] The third connection portion 513

[0074] The second connecting member 52

[0075] Fourth connection portion 521

[0076] Second recess 521a

[0077] Fifth connecting portion 522

[0078] Sixth connection portion 523

[0079] Circuit board 60

[0080] Second housing 70

[0081] Base 71

[0082] Accommodation space 711

[0083] The third opening 711a

[0084] The first protrusion 72

[0085] Second opening 721

[0086] Top wall 70a

[0087] The second protrusion 73

[0088] The first limiting portion 74

[0089] The second limiting portion 75

[0090] First housing portion 701

[0091] First accommodating chamber 701a

[0092] The second housing portion 702

[0093] The second accommodating chamber 702a

[0094] Electrical connection portion 90

[0095] The first fastening portion 110

[0096] First fastener 120

[0097] The second fastening portion 130

[0098] Second fastener 140

[0099] The third fastening portion 150

[0100] The third fastener 160

[0101] Fourth fastening portion 170

[0102] First sealing member 101

[0103] The first fixing member 102

[0104] Electrical connector 104

[0105] Accommodation space 100a

[0106] Adhesive member 100b

[0107] Electrical equipment 200

[0108] First direction X

[0109] Second direction Y

[0110] The third direction Z

[0111] The following specific embodiments will further illustrate the present application in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0112] The following specific embodiments are exemplary and non-limiting, and are intended to provide a basic understanding of the present application, and are not intended to identify the key or decisive elements of the present application or to limit the scope of protection. As long as there is no structural conflict, the various technical features mentioned in each embodiment can be combined in any way.

[0113] When a component is considered to be “provided on” another component, it can be directly provided on the other component or there may be a component in between. When a component is considered to be “connected to” another component, it can be directly connected to the other component or there may be a component in between.

[0114] It can be understood that the term "perpendicular" is used to describe an ideal state between two components. In actual production or use, there may be a state that is approximately perpendicular or equal to each other between the two components. For example, in combination with numerical descriptions, perpendicularity can refer to the angle between two straight lines being between 90°±10°, perpendicularity can also refer to the dihedral angle between two planes being between 90°±10°, and perpendicularity can also refer to the angle between a straight line and a plane being between 90°±10°. The two components described as "perpendicular" may not be absolute straight lines or planes, but may be roughly straight lines or planes. From a macroscopic perspective, a component can be considered a "straight line" or a "plane" if the overall extension direction is a straight line or a plane.

[0115] The terms “vertical”, “horizontal”, “left”, “right”, “top”, “bottom”, “front”, “back” and similar expressions used in this document are for illustrative purposes only and are not intended to limit this application.

[0116] Unless otherwise defined, when the term "plurality" is used to describe the number of components, it specifically means that the components are two or more.

[0117] An embodiment of the present application provides a battery pack, including a first shell, a battery cell assembly, a first component, a top cover and a connector. The first shell includes a shell side wall. The battery cell assembly is disposed in the first shell. The first component is disposed in the first shell. The top cover is fixedly connected to the first shell, the top cover, the first component and the battery cell assembly are arranged in a first direction, and the top cover is fixedly connected to the first component. The connector is fixedly connected to the first component, and the connector is fixedly connected to the shell side wall. When the battery cell assembly expands or is subjected to other forces, the first component is fixedly connected to the connector, and the connector is fixedly connected to the shell side wall, so that the force can be transmitted to the shell side wall, thereby reducing the expansion force on the top cover, facilitating the top cover to be fixedly connected to the first shell, and reducing the risk of connection failure between the top cover and the first shell.

[0118] Some embodiments of the present application are described in detail below in conjunction with the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0119] See also Figures 1 to 3 and Figure 6 An embodiment of the present application provides a battery pack 100 , including a first housing 10 and a battery cell assembly 20 . The battery cell assembly 20 is disposed in the first housing 10 .

[0120] In some embodiments, the first shell 10 includes a shell bottom wall 11 and a shell side wall 12 , the shell bottom wall 11 is connected to the shell side wall 12 , and forms a receiving space 100 a , and the battery cell assembly 20 is disposed in the receiving space 100 a .

[0121] In some embodiments, the battery pack 100 includes a first component 30 disposed in the first housing 10 .

[0122] In some embodiments, the first member 30 and the housing side wall 12 are fixedly connected.

[0123] In some embodiments, the battery pack 100 includes a top cover 40 , which is fixedly connected to the first shell 10 . The top cover 40 , the first component 30 and the battery cell assembly 20 are arranged along the first direction X, and the top cover 40 is fixedly connected to the first component 30 .

[0124] In some embodiments, the battery pack 100 includes a connector 50, the connector 50 is fixedly connected to the first member 30, and the connector 50 is fixedly connected to the housing side wall 12. When the battery cell assembly 20 expands or is subjected to other forces, the connector 50 is fixedly connected to the first member 30, and the connector 50 is fixedly connected to the housing side wall 12, so that the force can be transmitted to the housing side wall 12, reducing the expansion force on the top cover 40, which is conducive to the top cover 40 being fixedly connected to the first housing 10, and reducing the risk of connection failure between the top cover 40 and the first housing 10.

[0125] See also Figure 2 In some embodiments, the housing sidewall 12 includes a first connecting sidewall 121, a second connecting sidewall 122, a third connecting sidewall 123, and a fourth connecting sidewall 124. The first connecting sidewall 121 and the second connecting sidewall 122 are arranged along the second direction Y, and the third connecting sidewall 123 and the fourth connecting sidewall 124 are arranged along the third direction Z. The first connecting sidewall 121 connects the third connecting sidewall 123 and the fourth connecting sidewall 124. The second connecting sidewall 122 connects the third connecting sidewall 123 and the fourth connecting sidewall 124. The first direction X, the second direction Y, and the third direction Z are perpendicular to each other.

[0126] See also Figure 3 and Figure 4 In some embodiments, the top cover 40 is connected to the shell side wall 12 to close the receiving space 100a.

[0127] In some embodiments, a first end surface 12 a and a first protrusion 10 a extending from the first end surface 12 a are provided on a side of the shell side wall 12 facing away from the shell bottom wall 11 , and a thickness of the first protrusion 10 a is smaller than a thickness of the shell side wall 12 .

[0128] In some embodiments, the top cover 40 is provided with a second end face 40a and a top cover recess 40b on the side facing the shell side wall 12, the first protrusion 10a is provided in the top cover recess 40b, and the second end face 40a is connected to the first end face 12a, which can reduce the possibility of deformation at the connection between the shell side wall 12 and the top cover 40, improve the connection between the first shell 10 and the top cover 40, and reduce the risk of generating a gap between the shell side wall 12 and the top cover 40, thereby affecting the sealing of the battery pack 100.

[0129] In some embodiments, the battery pack 100 includes a first seal 101 , which is disposed in the top cover recess 40 b , and the first protrusion 10 a abuts against the first seal 101 , which is beneficial to improving the sealing performance of the battery pack 100 .

[0130] See also Figure 5 In some embodiments, the first component 30 includes a bottom wall 31 and a plurality of side walls 32 , and the plurality of side walls 32 connect the bottom wall 31 .

[0131] In some embodiments, the plurality of side walls 32 include a first side wall 321, a second side wall 322, a third side wall 323, and a fourth side wall 324. The first side wall 321 and the second side wall 322 are arranged along the second direction Y, and the third side wall 323 and the fourth side wall 324 are arranged along the third direction Z. The first side wall 321 connects the third side wall 323 and the fourth side wall 324, and the second side wall 322 connects the third side wall 323 and the fourth side wall 324. The first side wall 321, the second side wall 322, the third side wall 323, and the fourth side wall 324 connect the bottom wall 31

[0132] In some embodiments, the first component 30 includes a first opening 30 a disposed on the fourth side wall 324 . When the battery cell assembly 20 thermally runs away or releases pressure, gas or fire flows from the first opening 30 a to the top cover 40 and releases pressure through the top cover 40 .

[0133] See also Figure 2 , Figure 3 , Figure 5 and Figure 6In some embodiments, the first member 30 includes a first extension portion 33, the first extension portion 33 is connected to the first side wall 321, and the first extension portion 33 extends in a direction away from the second side wall 322. The top cover 40 is fixedly connected to the first extension portion 33, and the second connection portion 512 is fixedly connected to the second extension portion 34.

[0134] In some embodiments, the first member 30 includes a second extension portion 34 connected to the second side wall 322 and extending in a direction away from the first side wall 321 . The first extension portion 33 and the second extension portion 34 are arranged along the second direction Y. The top cover 40 is fixedly connected to the second extension portion 34 .

[0135] In some embodiments, the first member 30 includes a third extension portion 35, the third extension portion 35 is connected to the third side wall 323, and the third extension portion 35 extends in a direction away from the fourth side wall 324. The third extension portion 35 is fixedly connected to the first housing 10.

[0136] In some embodiments, the first member 30 includes a fourth extension portion 36 connected to the fourth side wall 324 and extending in a direction away from the third extension portion 35. The third extension portion 35 and the fourth extension portion 36 are arranged along the third direction Z. The fourth extension portion 36 is fixedly connected to the first housing 10.

[0137] In some embodiments, the first shell 10 includes a fixing portion 13 , and the fixing portion 13 is disposed on an inner wall of the third connecting side wall 123 , and / or the fixing portion 13 is disposed on an inner wall of the fourth connecting side wall 124 .

[0138] In some embodiments, the battery pack 100 includes a first fixing member 102 , which fixes the first component 30 and the first shell 10 , and can transfer the force of the first component 30 to the first shell 10 , thereby improving the protection of the first component 30 .

[0139] In some embodiments, the fixing portion 13 is provided with a fixing hole 131, and the first member 30 is provided with a first connecting hole 301. Along the first direction X, the first fixing member 102 passes through the first connecting hole 301 and connects with the fixing hole 131 to fix the first member 30 to the first housing 10. Optionally, the first fixing member 102 includes a screw.

[0140] In some embodiments, the first connection hole 301 is provided in the third extension portion 35 , and the first fixing member 102 passes through the third extension portion 35 and connects to the fixing hole 131 . The first component 30 is fixedly connected to the first housing 10 through the third extension portion 35 .

[0141] In some embodiments, the first connection hole 301 is provided in the fourth extension portion 36, and the first fixing member 102 passes through the fourth extension portion 36 and connects to the fixing hole 131. The first component 30 is fixedly connected to the first housing 10 through the fourth extension portion 36.

[0142] In some embodiments, the first connecting member 51 is fixedly connected to the first extending portion 33 .

[0143] In some embodiments, the connector 50 includes a first connector 51 , and the first connecting sidewall 121 and the first connector 51 are arranged along the second direction Y. The first connector 51 includes a first connecting portion 511 located in the first housing 10 , and the first connecting portion 511 is fixedly connected to the first connecting sidewall 121 .

[0144] In some embodiments, the battery pack 100 includes an adhesive member 100 b , the first connection portion 511 is provided with a first recess 511 a , the adhesive member 100 b is provided in the first recess 511 a , and the adhesive member 100 b is adhesively and fixedly connected to the first connection side wall 121 and the first connection portion 511 .

[0145] In other embodiments, the first connection portion 511 may be fixedly connected to the first connection side wall 121 by other means, such as welding, screw connection, etc.

[0146] See also Figures 3 to 6 In some embodiments, the first connecting member 51 includes a second connecting portion 512 , and the second connecting portion 512 and the first extending portion 33 are arranged along the first direction X. The second connecting portion 512 is connected to the first connecting portion 511 , and the second connecting portion 512 is fixedly connected to the first extending portion 33 .

[0147] In some embodiments, the battery pack 100 includes a first fastening portion 110 , and along the first direction X, the first fastening portion 110 protrudes from the first extending portion 33 .

[0148] In some embodiments, the first extending portion 33 is provided with a second connection hole 302 , the second connection hole 302 penetrates the first extending portion 33 along the first direction X, and the first fastening portion 110 is fixed to the first extending portion 33 .

[0149] In some embodiments, the battery pack 100 includes a first fastener 120, which passes through the second connection portion 512 and connects to the first fastening portion 110 to fix the second connection portion 512 and the first extension portion 33. Optionally, the first fastener 120 includes a screw.

[0150] See also Figure 2 , Figure 5 and Figure 6In some embodiments, the battery pack 100 includes a second fastening portion 130, and the second fastening portion 130 is fixedly connected to the first extending portion 33. In a direction opposite to the first direction X, the second fastening portion 130 protrudes from the first extending portion 33.

[0151] In some embodiments, the first extending portion 33 defines a third connecting hole 303 , and a portion of the second fastening portion 130 is located in the third connecting hole 303 .

[0152] In some embodiments, the battery pack 100 includes a second fastener 140, the top cover 40 is provided with a first through hole 41, the second fastener 140 is provided in the first through hole 41, and the second fastener 140 is fixedly connected to the second fastening portion 130. Optionally, the second fastener 140 includes a screw. The second fastener 140 fixes the top cover 40 and the first extension portion 33.

[0153] In some embodiments, the battery pack 100 includes a second sealing member (not shown), which is disposed on the first through hole 41 and can seal the first through hole 41. Optionally, the second sealing member includes glue.

[0154] In some embodiments, the first connecting member 51 includes a third connecting portion 513, which connects the first connecting portion 511 and the second connecting portion 512, thereby increasing the structural strength of the first connecting member 51 and reducing the risk of deformation of the first connecting member 51 when subjected to expansion force.

[0155] In some embodiments, the first connection portion 511 is perpendicular to the second connection portion 512, and the third connection portion 513 is disposed obliquely relative to the first connection portion 511 and the second connection portion 512. Optionally, the first connection member 51 is substantially in the shape of a triangular prism.

[0156] In some embodiments, the first connection portion 511 , the second connection portion 512 , and the third connection portion 513 are integrally formed.

[0157] See also Figures 3 to 6 In some embodiments, the connecting member 50 includes a second connecting member 52 , and the second connecting member 52 is fixedly connected to the second extending portion 34 .

[0158] In some embodiments, the second connecting member 52 and the second connecting side wall 122 are arranged along the second direction Y. The second connecting member 52 includes a fourth connecting portion 521 located in the first housing 10 , and the fourth connecting portion 521 is fixedly connected to the second connecting side wall 122 .

[0159] In some embodiments, the fourth connection portion 521 is provided with a second recess 521 a , the adhesive member 100 b is provided in the second recess 521 a , and the fourth connection portion 521 is fixedly connected to the second connection side wall 122 via the adhesive member 100 b .

[0160] In other embodiments, the fourth connection portion 521 may be fixedly connected to the second connection side wall 122 in other ways, such as welding, screw connection, etc.

[0161] See also Figure 3 , Figure 5 and Figure 6 In some embodiments, the second connecting member 52 includes a fifth connecting portion 522 , and the fifth connecting portion 522 and the second extending portion 34 are arranged along the first direction X. The fifth connecting portion 522 is connected to the fourth connecting portion 521 , and the fifth connecting portion 522 is fixedly connected to the second extending portion 34 .

[0162] In some embodiments, the battery pack 100 includes a third fastening portion 150 , and along the first direction X, the third fastening portion 150 protrudes from the second extending portion 34 .

[0163] In some embodiments, the second extending portion 34 defines a fourth connection hole 304 , which penetrates the second extending portion 34 along the first direction X, and a portion of the third fastening portion 150 is located in the fourth connection hole 304 .

[0164] In some embodiments, the battery pack 100 includes a third fastener 160, which passes through the fifth connection portion 522 and connects to the third fastening portion 150 to fix the fifth connection portion 522 and the second extension portion 34. Optionally, the third fastener 160 includes a screw.

[0165] In some embodiments, the battery pack 100 includes a fourth fastening portion 170, and the fourth fastening portion 170 is fixedly connected to the second extending portion 34. In a direction opposite to the first direction X, the fourth fastening portion 170 protrudes from the second extending portion 34.

[0166] In some embodiments, the first extending portion 33 defines a fifth connecting hole 305 , and a portion of the fourth fastening portion 170 is located in the fifth connecting hole 305 .

[0167] In some embodiments, the battery pack 100 includes a fourth fastener (not shown), the top cover 40 is provided with a second through hole (not shown), the fourth fastener is provided in the second through hole, and the fourth fastener is fixedly connected to the fourth fastening portion 170. Optionally, the fourth fastener includes a screw.

[0168] In some embodiments, the second connecting member 52 includes a sixth connecting portion 523, which connects the fourth connecting portion 521 and the fifth connecting portion 522, thereby increasing the structural strength of the second connecting member 52 and reducing the risk of deformation of the second connecting member 52 when subjected to expansion force.

[0169] In some embodiments, the fourth connection portion 521 is perpendicular to the fifth connection portion 522, and the sixth connection portion 523 is disposed obliquely relative to the fourth connection portion 521 and the fifth connection portion 522. Optionally, the second connection member 52 is substantially in the shape of a triangular prism.

[0170] In some embodiments, the fourth connection portion 521 , the fifth connection portion 522 , and the sixth connection portion 523 are integrally formed.

[0171] See also Figure 3 and Figure 5 In some embodiments, along the first direction X, the distance h1 between the first extension portion 33 and the first seal 101 is greater than the distance h2 between the third extension portion 35 and the first seal 101. The distance h1 between the first extension portion 33 and the first seal 101 is greater than the distance between the fourth extension portion 36 and the first seal 101, which increases the distance between the top cover 40 and the first extension portion 33, making it easier to install the second fastening portion 130.

[0172] In some embodiments, the distance h3 between the second extension portion 34 and the first seal 101 is greater than the distance h2 between the third extension portion 35 and the first seal 101, and the distance between the second extension portion 34 and the first seal 101 is greater than the distance between the fourth extension portion 36 and the first seal 101, thereby increasing the distance between the top cover 40 and the second extension portion 34 to facilitate the installation of the fourth fastening portion 170.

[0173] In some embodiments, the first component 30 is made of metal or the surface of the first component 30 is coated with metal.

[0174] See also Figure 2 and Figure 3 In some embodiments, the battery cell assembly 20 includes a plurality of battery cells 21 , and the plurality of battery cells 21 are arranged along a first direction X.

[0175] In some embodiments, each battery cell 21 includes a main body 211 and an electrode terminal 213, wherein the electrode terminal 213 extends out of the main body 211. The battery cell 21 includes an electrode assembly 212, wherein the electrode assembly 212 is disposed in the main body 211. Optionally, the battery includes a soft-pack battery cell.

[0176] In some embodiments, along the first direction X, the projection of the bottom wall 31 overlaps with the projection of the main body 211 , which is beneficial to restrict the position of the battery cell 21 . The bottom wall 31 can apply pressure to the battery cell 21 .

[0177] See also Figure 2In some embodiments, the battery pack 100 includes a circuit board 60, the main body 211 and the circuit board 60 are arranged along the third direction Z, and the electrode terminal 213 is connected to the circuit board 60. Optionally, the circuit board 60 includes a flexible printed circuit (FPC). Optionally, the circuit board 60 includes a printed circuit board (PCB).

[0178] In some embodiments, the circuit board 60 includes a BMS component (Battery Management System), which includes multiple electronic components. The multiple electronic components can realize functions such as control, protection, communication, power calculation, signal transmission, and power transmission of the battery cell 21.

[0179] See also Figure 3 , Figures 6 to 9 In some embodiments, the battery pack 100 includes a second shell 70, which is disposed in the first shell 10, and the battery cell assembly 20 is disposed in the second shell 70, so as to strengthen the protection of the battery cell assembly 20 and reduce the influence of the expansion force on the first component 30 and the connector 50.

[0180] In some embodiments, the circuit board 60 is disposed in the second housing 70 .

[0181] In some embodiments, the second housing 70 includes a base 71 , the base 71 includes a receiving space 711 , and the battery cell assembly 20 is disposed in the receiving space 711 .

[0182] In some embodiments, the second housing 70 includes a first protrusion 72 extending from the base 71 in a direction opposite to the first direction X.

[0183] In some embodiments, the first protrusion 72 is provided with a second opening 721, and the second opening 721 connects the accommodating space 711 and the first opening 30a, which is conducive to pressure relief. Optionally, the second opening 721 directly connects the accommodating space 711 and the first opening 30a. Optionally, the second opening 721 indirectly connects the accommodating space 711 and the first opening 30a through other spaces.

[0184] In some embodiments, the fourth side wall 324 and the first protrusion 72 are arranged in an aligned manner along the third direction Z. The fourth extension portion 36 is connected to the first protrusion 72 to facilitate fixing the second housing 70 .

[0185] In some embodiments, the base 71 has a top wall 70 a , and the bottom wall 31 is connected to the top wall 70 a , which can limit the position of the second shell 70 in the first shell 10 along the first direction X.

[0186] In some embodiments, the accommodating space 711 includes a third opening 711 a , and the third opening 711 a penetrates the top wall 70 a .

[0187] In some embodiments, the second housing 70 includes a first limiting portion 74 and a second limiting portion 75, and the first limiting portion 74 and the second limiting portion 75 are spaced apart from each other on the top wall 70a along the second direction Y. Along the second direction Y, the first side wall 321 and the second side wall 322 are disposed between the first limiting portion 74 and the second limiting portion 75, and the position of the second housing 70 in the first housing 10 along the second direction Y can be limited.

[0188] In some embodiments, the second housing 70 includes a first housing portion 701 and a second housing portion 702 arranged along the second direction Y. The first housing portion 701 is provided with a first accommodating cavity 701 a, the second housing portion 702 is provided with a second accommodating cavity 702 a, and the first housing portion 701 is connected to the second housing portion 702 to form an accommodating space 711.

[0189] In some embodiments, the battery pack 100 includes an electrical connector 104 , which is connected to the battery cell assembly 20 , and the electrical connector 104 passes through the third opening 711 a , the second opening 721 , and the first opening 30 a .

[0190] In some embodiments, the electrical connector 104 can transmit electrical power or signals. Optionally, the electrical connector 104 includes a wiring harness.

[0191] In some embodiments, the second housing 70 includes a second protrusion 73 extending from the base 71 in a direction opposite to the first direction X. The second protrusion 73 and the first protrusion 72 are spaced apart in the third direction Z.

[0192] In some embodiments, the second protrusion 73 and the third side wall 323 are arranged in a row along the third direction Z. The third extension portion 35 is connected to the second protrusion 73 to facilitate fixing the second housing 70 .

[0193] See also Figure 1 In some embodiments, the battery pack 100 includes an electrical connection portion 90, the electrical connection portion 90 is connected to the top cover 40, and the electrical connector 104 passes through the first opening 30a and is connected to the electrical connection portion 90. A portion of the electrical connection portion 90 is located inside the top cover 40 and a portion extends out of the top cover 40, and the electrical connection portion 90 is configured to be connected to an external device.

[0194] See also Fig.10The present application also provides an electric device 200 using the above battery pack 100. In one embodiment, the electric device 200 of the present application may be, but is not limited to, electronic equipment, drones, backup power supplies, electric vehicles, electric motorcycles, electric power-assisted bicycles, electric tools, large household battery modules, etc.

[0195] Those skilled in the art should recognize that the above embodiments are only used to illustrate the present application, and are not used as limitations on the present application. As long as they are within the spirit of the present application, appropriate changes and modifications to the above embodiments are within the scope of the present application.

Claims

1. A battery pack, characterized in that: include: A first shell, the first shell comprising a shell side wall; A battery cell assembly, disposed in the first housing; A first component, disposed in the first shell; A top cover, fixedly connected to the first shell, wherein the top cover, the first component and the battery cell assembly are arranged along a first direction, and the top cover is fixedly connected to the first component; A connecting member, wherein the connecting member is fixedly connected to the first component and the connecting member is fixedly connected to the side wall of the shell.

2. The battery pack according to claim 1, wherein: The shell side wall includes a first connecting side wall, the connecting member includes a first connecting member, and the first connecting side wall and the first connecting member are arranged in a second direction; The first connecting member includes a first connecting portion located in the first shell, the first connecting portion is fixedly connected to the first connecting side wall, and the first direction is perpendicular to the second direction.

3. The battery pack according to claim 2, characterized in that: The battery pack includes an adhesive component, the first connecting portion is provided with a first recess, the adhesive component is arranged in the first recess, and the adhesive component fixedly connects the first connecting side wall and the first connecting portion.

4. The battery pack according to claim 2, characterized in that: The first connecting member includes a second connecting portion, The first member includes a first extending portion, and the second connecting portion and the first extending portion are arranged along the first direction; The second connecting portion is connected to the first connecting portion, and the second connecting portion is fixedly connected to the first extending portion.

5. The battery pack according to claim 4, characterized in that: The battery pack includes a first fastening member and a first fastening portion. The first fastening portion protrudes from the first extending portion along the first direction. The first fastening member passes through the second connecting portion and the first extending portion and connects to the first fastening portion.

6. The battery pack according to claim 4, characterized in that: The battery pack includes a second fastening portion and a second fastening member, the second fastening portion protruding out of the first extending portion in a direction opposite to the first direction; The top cover is provided with a first through hole, the second fastener is provided in the first through hole, and the second fastener is fixedly connected to the second fastening portion.

7. The battery pack according to any one of claims 4 to 6, characterized in that: The first component includes a bottom wall and a plurality of side walls, the side walls are connected to the bottom wall, the plurality of side walls include a first side wall and a second side wall arranged along the second direction, and a third side wall and a fourth side wall arranged along a third direction, and the first direction, the second direction and the third direction are perpendicular to each other; The first component includes the first extension portion connected to the first side wall, the top cover is fixedly connected to the first extension portion, and the second connection portion is fixedly connected to the first extension portion.

8. The battery pack according to claim 7, characterized in that: The battery pack includes a second shell disposed in the first shell, the second shell includes a base and a first protrusion extending from the base, the base includes a receiving space, and the battery cell assembly is disposed in the receiving space; The first component includes a fourth extending portion, the fourth extending portion is connected to the fourth side wall, the fourth extending portion is fixedly connected to the first shell, and along the first direction, the fourth extending portion is connected to the first protrusion.

9. The battery pack according to claim 7, characterized in that: The battery cell assembly includes a plurality of battery cells, the plurality of battery cells are arranged along the first direction, the battery cell includes a main body and an electrode terminal, and the electrode terminal extends out of the main body; Along the first direction, a projection of the bottom wall and a projection of the main body overlap.

10. An electrical device, characterized in that: A battery pack comprising the battery pack as claimed in any one of claims 1 to 9.

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