Battery pack and electric equipment

Abstract

The invention discloses a battery pack and electric equipment. The battery pack comprises a shell, a battery module and a structural member, the battery module is arranged in the shell and comprises a first battery group and a second battery group, and the first battery group and the second battery group are electrically connected and arranged in the first direction. The structural part is arranged in the shell and comprises a first part and a second part, the first part is arranged between the first battery group and the second battery group in the first direction, the second part is connected with the first part, the second part is located on one side of the battery module in the second direction, the second part is connected with the shell, and the second direction is perpendicular to the first direction. The first part of the structural member conducts heat between the first battery group and the second battery group, the first part transmits the heat to the second part, the second part transmits the heat to the shell and dissipates heat through the shell, and therefore the heat dissipation effect of the first battery group and the second battery group can be improved.

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] As users' requirements for electrical devices increase, the battery modules of some battery packs include multiple battery groups connected in series or in parallel, each battery group includes multiple batteries connected in series or in parallel, and the multiple battery groups are closely arranged. However, closely arranged battery groups easily make it difficult for the heat of the batteries inside to dissipate, which in turn causes the battery pack to heat up too quickly. Summary of the invention

[0003] In view of this, the present application provides a battery pack and an electrical device, aiming to improve the heat dissipation effect of the battery pack.

[0004] In a first aspect of the present application, a battery pack is provided, the battery pack comprising a housing, a battery module and a structural member. The battery module is disposed in the housing, the battery module comprising a first battery group and a second battery group, the first battery group and the second battery group are electrically connected and arranged along a first direction. The structural member is disposed in the housing, the structural member comprising a first part and a second part, along the first direction, the first part is disposed between the first battery group and the second battery group, the second part is connected to the first part, the second part is located on one side of the battery module in the second direction, and the second part is connected to the housing, and the second direction is perpendicular to the first direction.

[0005] In the above embodiment, the first part of the structural member is arranged between the first battery group and the second battery group, so that the first part conducts the heat between the first battery group and the second battery group, the first part transfers the heat to the second part, and the second part transfers the heat to the shell and dissipates the heat through the shell. The structural member draws out the heat between the first battery group and the second battery group and transfers it to the shell, which is beneficial to improve the efficiency of the heat of the first battery group and the second battery group to be dissipated outside the shell, and is beneficial to reduce the temperature rise of the battery pack. In addition, the second part of the structural member is arranged in the shell, so that when the battery pack is subjected to impact such as falling, the impact first acts on the shell, and the local deformation of the shell absorbs part of the impact force, which is beneficial to alleviate the impact force on the second part, thereby reducing the risk of the structural member driving the first battery group and the second battery group to move.

[0006] In some embodiments, the shell is provided with a slide groove extending along the second direction, the first part is provided with a slide rail extending along the second direction, and part of the slide rail is arranged in the slide groove.

[0007] In the above embodiment, when the battery module is installed into the housing, the slide rail cooperates with the slide groove to make the structural member slide relative to the housing, and the structural member drives the first battery group and the second battery group to slide into the housing. The cooperation between the slide rail and the slide groove is conducive to improving the convenience of installing the battery module, and is also conducive to limiting the movement of the structural member relative to the housing in the first direction, thereby limiting the movement of the battery module relative to the housing in the first direction, thereby improving the impact resistance of the battery pack.

[0008] In some embodiments, the battery pack includes a fastener, the fastener is passed through the first battery group, the first portion, and the second battery group, and the fastener connects the first battery group, the first portion, and the second battery group.

[0009] In the above embodiment, the fasteners fix the first battery group, the first part and the second battery group as a whole, which is beneficial to limiting the relative movement between the first battery group, the first part and the second battery group, and the second part connected to the first part is also connected to the shell, which is beneficial to limiting the movement of the first battery group, the first part and the second battery group relative to the shell, allowing the structural member to play the role of supporting the skeleton, thereby improving the impact resistance and vibration resistance of the battery pack and improving the reliability of the battery pack.

[0010] In some embodiments, along the second direction, the housing includes a first housing, a second housing, and a third housing connected in sequence, the first housing, the second housing, and the third housing are surrounded to form a receiving cavity, and the receiving cavity receives the battery module and the structural member. The slide groove is provided in the second housing, and the second part is connected to the first housing.

[0011] In some embodiments, the first portion is provided with a plurality of grooves, the grooves extend along the second direction, and the plurality of grooves are arranged along a third direction, and the third direction is perpendicular to the first direction and the second direction in pairs.

[0012] In the above embodiment, the provision of the groove is conducive to reducing the weight of the first part as a whole, thereby reducing the weight of the entire battery pack, which is conducive to improving the energy density of the battery pack. In addition, compared with the solution of thinning the first part as a whole, the solution of providing the groove is also conducive to improving the structural strength of the first part and improving the ability of the structural member to restrict the movement of the first battery group and the second battery group.

[0013] In some embodiments, the first portion is provided with a plurality of grooves, the grooves extend along a third direction, the plurality of grooves are arranged along the second direction, and the third direction is perpendicular to the first direction and the second direction in pairs.

[0014] In the above embodiment, the provision of the groove is conducive to reducing the weight of the first part as a whole, thereby reducing the weight of the entire battery pack, which is conducive to improving the energy density of the battery pack. In addition, compared with the solution of thinning the first part as a whole, the solution of providing the groove is also conducive to improving the structural strength of the first part and improving the ability of the structural member to restrict the movement of the first battery group and the second battery group.

[0015] In some embodiments, the battery pack further includes a first thermal conductor, which is disposed between the first battery group and the first portion along a first direction, the first thermal conductor is in contact with both the first battery group and the first portion, and the thermal conductivity of the first thermal conductor is greater than the thermal conductivity of the first portion.

[0016] In the above embodiment, the thermal conductivity of the first heat conductor is greater than that of the first portion, which is beneficial to improving the heat exchange efficiency between the first battery group and the first portion, and is beneficial to further improving the heat dissipation efficiency of the first battery group and the second battery group.

[0017] In some embodiments, the battery pack further includes a first thermal conductor, which is disposed between the first battery group and the first portion along a first direction, the first thermal conductor is in contact with both the first battery group and the first portion, and the thermal conductivity of the first thermal conductor is less than the thermal conductivity of the first portion.

[0018] In the above embodiment, the first heat conductor is conducive to filling the gap between the first part and the first battery group, thereby facilitating the improvement of the heat exchange efficiency between the first battery group and the first part, and facilitating the improvement of the heat dissipation efficiency of the first battery group and the second battery group.

[0019] In some embodiments, the first heat conductive member can also play a buffering role, and the groove of the first part can provide deformation space for the first heat conductive member, thereby improving the impact resistance of the battery pack.

[0020] In some embodiments, the material of the first part includes at least one of aluminum, copper, and iron, and the material of the first heat-conducting component includes at least one of thermal grease, thermal silica gel, and thermal cotton.

[0021] In the above embodiment, the first part includes at least one of aluminum, copper, and iron, which is conducive to improving the thermal conductivity of the first part. The material of the first thermally conductive member includes at least one of thermal grease, thermally conductive silica gel, and thermally conductive cotton, which is conducive to improving the thermal conductivity of the first thermally conductive member and is also conducive to the deformation of the first thermally conductive member, thereby facilitating the first thermally conductive member to fill the gap between the first part and the first battery group.

[0022] In some embodiments, the second portion is in direct contact with the housing.

[0023] In the above embodiment, the second part is also in direct contact with the shell, which is beneficial to improving the heat exchange efficiency between the second part and the shell.

[0024] In some embodiments, the battery pack further includes a circuit board, which is electrically connected to the battery module. Along the second direction, the circuit board is disposed on one side of the battery module, and the second portion is disposed on a side of the battery module away from the circuit board.

[0025] In the above embodiment, the second part is arranged on the side of the battery module away from the circuit board, which is beneficial for the structural member to transfer the heat between the first battery group and the second battery group to the side of the battery module away from the circuit board, thereby reducing the impact of the heat generated by the first battery group and the second battery group on the circuit board.

[0026] In some embodiments, along the first direction, the projection of the first battery group is located within the projection of the first portion, and the projection of the second battery group is located within the projection of the first portion. Along the second direction, the projection of the second portion overlaps with the first battery group, and the projection of the second portion overlaps with the second battery group.

[0027] In the above embodiment, the projection of the first battery group is located within the projection of the first part, and the projection of the second battery group is located within the projection of the first part, which is beneficial to increase the heat exchange area between the first part and the first battery group and the second battery group. Along the second direction, the projection of the second part overlaps with the first battery group, which is beneficial to increase the contact area between the second part and the first shell, and is beneficial to improve the efficiency of the structural member in transferring heat to the shell, thereby facilitating improving the heat dissipation efficiency of the first battery group and the second battery group.

[0028] In some embodiments, the battery module further includes a connector, the connector electrically connecting the first battery group and the second battery group. Along the third direction, one side of the first portion is provided with a first opening extending along the first direction, the connector is passed through the first opening, and the third direction is perpendicular to the first direction and the second direction.

[0029] In the above embodiment, the first opening is provided to help the first part avoid the conductive connecting member, and when the first part is made of conductive metal, it is helpful to reduce the risk of short circuit caused by contact between the connecting member and the first part.

[0030] In some embodiments, along the third direction, the first portion has a first side and a second side that are oppositely disposed, the first opening is disposed on the second side, and along the third direction, the connecting member does not extend beyond the second side.

[0031] In the above embodiment, the connecting member does not extend beyond the second side in the third direction, so that the first portion extends beyond the connecting member in the third direction, which is beneficial to protecting the connecting member and reducing the risk of direct contact between the connecting member and components such as the housing.

[0032] In some embodiments, the battery pack further includes a first heat conductive member, which is disposed between the first battery group and the first portion along the first direction, and is in contact with both the first battery group and the first portion, and has a thermal conductivity less than that of the first portion. Along the first direction, the projection of the first battery group is located within the projection of the first heat conductive member, and the projection of the second battery group is located within the projection of the first heat conductive member. Along the third direction, a second opening is provided on one side of the first heat conductive member that passes through the first direction, and when viewed along the first direction, the second opening is located within the first opening, and the connector is provided through the first opening and the second opening.

[0033] In the above embodiment, when observed along the first direction, the second opening is located inside the first opening, and the connecting member is passed through the first opening and the second opening, so that in extreme cases, when relative displacement occurs between the connecting member and the first part, the connecting member is allowed to contact the insulating first heat-conducting member first, which helps to reduce the risk of short circuit caused by contact between the connecting member and the first part made of metal material.

[0034] In some embodiments, the first battery group includes a first bracket, a second bracket, and a plurality of first batteries, one end of the plurality of first batteries is connected to the first bracket, and the other end of the plurality of first batteries is connected to the second bracket, and the second battery group includes a third bracket, a fourth bracket, and a plurality of second batteries, one end of the plurality of second batteries is connected to the third bracket, and the other end of the plurality of second batteries is connected to the fourth bracket. Along the first direction, the first bracket, the second bracket, the first portion, the third bracket, and the fourth bracket are arranged and connected in sequence.

[0035] In some embodiments, the second bracket has a first wall and a second wall arranged opposite to each other in a third direction, and the third direction is perpendicular to the first direction and the second direction. The first battery group also includes a first protective member, the first protective member includes a first section and a second section, the first section is connected to the first wall, the second section is connected to the first section, and the plane where the second section is located is parallel to the plane where the first wall is located.

[0036] In the above embodiment, when the battery module contacts other components, the second wall of the first protective member can contact the other components first, which is beneficial to improving the protective effect of the first battery group. The setting of the first section and the second section enables the second section to deform when contacting other components to play a buffering role, further improving the protective effect of the first battery group.

[0037] In some embodiments, the battery module further includes a connector, the connector electrically connecting the first battery group and the second battery group, the number of the first protective members is multiple, and the multiple first protective members are arranged along the second direction.

[0038] Along the second direction, the connecting member is disposed between two adjacent first protecting members.

[0039] In the above embodiment, along the second direction, the connecting member is disposed between two adjacent first protective members, which is conducive to allowing the first protective member to protect the connecting member. When the battery module contacts other components, the first protective member contacts other components first, thereby reducing the risk of the connecting member contacting other components. In addition, the two first protective members are also conducive to limiting the movement of the connecting member in the second direction, thereby improving the reliability of the battery pack.

[0040] In some embodiments, along the third direction, the connector does not extend beyond the second section.

[0041] In the above embodiment, the connecting member does not extend beyond the second section in the third direction, so that the first protective member extends beyond the connecting member in the third direction, which is beneficial to protecting the connecting member and reducing the risk of direct contact between the connecting member and components such as the housing.

[0042] In some embodiments, along the first direction, the second section has a first edge away from the third bracket. The third bracket has a third wall and a fourth wall arranged opposite to each other in the third direction; the second battery group includes a second protective member, the second protective member includes a third section and a fourth section, the third section is connected to the third wall, the fourth section is connected to the third section, the plane where the fourth section is located is parallel to the plane where the third wall is located, and along the first direction, the fourth section has a second edge away from the second bracket. In the first direction, the connector does not extend beyond the first edge, and the connector does not extend beyond the second edge.

[0043] In the above embodiment, in the first direction, the connecting member does not extend beyond the first edge and the second edge, which is conducive to the first protective member and the second protective member jointly protecting the two sides of the connecting member in the first direction, thereby reducing the risk of direct contact between the connecting member and components such as the shell.

[0044] In a second aspect of the present application, an electrical device is provided, which includes a battery pack as in any of the above embodiments.

[0045] In the above embodiments, the heat dissipation performance of the battery pack is improved and the temperature rise is reduced, which is beneficial to improving the reliability of the use of electrical equipment and reducing the risk of failure of the electrical equipment.

[0046] The battery pack in the present application includes a shell and a battery module and a structural member arranged in the shell. The battery module includes a first battery group and a second battery group arranged along a first direction. The structural member includes a first part and a second part connected to each other. Along the first direction, the first part is arranged between the first battery group and the second battery group, and the second part is located on one side of the battery module in the second direction and connected to the shell, and the second direction is perpendicular to the first direction. The first part absorbs the heat between the first battery group and the second battery group, and the first part transfers the heat to the second part, and the second part transfers the heat to the shell and dissipates the heat through the shell. The structural member plays the role of drawing out and dissipating the heat between the first battery group and the second battery group, which is beneficial to improve the efficiency of heat dissipation of the first battery group and the second battery group to the outside of the shell, and is beneficial to reduce the temperature rise of the battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] Figure 1 A schematic diagram of the structure of a battery pack provided in one embodiment of the present application.

[0048] Figure 2 for Figure 1 Exploded view of the battery pack.

[0049] Figure 3 A schematic structural diagram of a first battery provided in one embodiment of the present application.

[0050] Figure 4 A schematic structural diagram of a battery pack provided in an embodiment of the present application with the shell omitted.

[0051] Figure 5 A schematic structural diagram of a battery pack provided in another embodiment of the present application with the shell omitted.

[0052] Figure 6 A cross-sectional view of a battery pack provided in one embodiment of the present application with the third shell omitted.

[0053] Figure 7 A schematic structural diagram of a battery pack provided in one embodiment of the present application with the third shell omitted.

[0054] Figure 8 for Figure 7 A partial enlarged view of part A in the middle.

[0055] Fig. 9 A side view of a structural member provided in one embodiment of the present application.

[0056] Fig.10 A schematic diagram of a structural member and a first heat conducting member provided in an embodiment of the present application.

[0057] Fig.11 A schematic diagram of a structural member provided in accordance with an embodiment of the present application.

[0058] Fig.12 A schematic structural diagram of a battery pack provided in an embodiment of the present application omitting the housing and the first battery group.

[0059] Fig.13 for Figure 5 Schematic diagram of the structure of the battery pack from another perspective.

[0060] Fig.14 A schematic diagram of a structural member and a first battery group provided in an embodiment of the present application.

[0061] Fig.15 A schematic diagram of a structural member and a second battery group provided in an embodiment of the present application.

[0062] Fig.16 for Fig.13 A partial enlarged view of part B in the middle.

[0063] Fig.17 A schematic diagram of a structural member, a first heat conducting member, and a first battery group provided in an embodiment of the present application.

[0064] Fig.18 A schematic diagram of a structural member, a second heat conducting member and a second battery group provided in one embodiment of the present application.

[0065] Fig.19 A schematic diagram of a structural member, a first heat conducting member and a second battery group provided in an embodiment of the present application.

[0066] Fig. 20 for Figure 5 Schematic diagram of the structure of the battery pack from another angle.

[0067] Fig.21 for Figure 7 Top view of the battery pack.

[0068] Fig. 22 A side view of a battery pack provided in an embodiment of the present application with the first shell and the second shell omitted.

[0069] Fig.23 A schematic diagram of an electrical device provided in accordance with an embodiment of the present application.

[0070] Main component symbols

[0071] Battery Pack 100

[0072] Housing 10

[0073] First housing 11

[0074] Second housing 12

[0075] Chute 121

[0076] The third housing 13

[0077] Accommodation chamber 101

[0078] Battery module 20

[0079] First battery group 21

[0080] First battery 211

[0081] Cylinder 2111

[0082] Cover 2112

[0083] First bracket 212

[0084] Second bracket 213

[0085] First Wall 2131

[0086] Second Wall 2132

[0087] First protection member 214

[0088] First paragraph 2141

[0089] Second paragraph 2142

[0090] First edge 214a

[0091] Second battery group 22

[0092] Second battery 221

[0093] The third bracket 222

[0094] The third wall 2221

[0095] The fourth wall 2222

[0096] Fourth bracket 223

[0097] Second protection member 224

[0098] The third paragraph 2241

[0099] Section 4 2242

[0100] Second edge 224a

[0101] Nickel sheet 23

[0102] First insulating sheet 24

[0103] Second insulating sheet 25

[0104] Connector 26

[0105] Structural parts 30

[0106] Part 31

[0107] Slide 311

[0108] Groove 312

[0109] First side 313

[0110] Second side 314

[0111] First opening 3141

[0112] Part 232

[0113] Fastener 40

[0114] The first heat conducting member 50

[0115] Second opening 51

[0116] The second heat conducting member 60

[0117] Circuit board 70

[0118] Equipment body 200

[0119] Electrical equipment 1000

[0120] First direction X

[0121] Second direction Y

[0122] The third direction Z DETAILED DESCRIPTION

[0123] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments.

[0124] It should be noted that when a component is considered to be "connected" to another component, it may be directly connected to the other component or there may be a central component at the same time. When a component is considered to be "located on" another component, it may be directly located on the other component or there may be a central component at the same time.

[0125] Unless otherwise specified, the term "plurality" as used herein means two or more than two.

[0126] The terms "first", "second", etc. are only used to distinguish different objects and shall not be understood as indicating or implying relative importance or implying the quantity, specific order or primary and secondary relationship of the indicated technical features.

[0127] The term "perpendicular" is used to describe an ideal state between two components. In actual production or use, the two components may be in a state that is approximately perpendicular to each other.

[0128] The term "parallel" is used to describe an ideal state between two components. In actual production or use, two components may be approximately parallel. For example, in combination with numerical descriptions, parallel can refer to the angle between two straight lines being within 180°±5°, parallel can also refer to the dihedral angle between two planes being within 180°±5°, and parallel can also refer to the angle between a straight line and a plane being within 180°±5°.

[0129] It should be noted that when a parameter is greater than, equal to or less than a certain endpoint value, it should be understood that the endpoint value is allowed to have a tolerance of ±5%. For example, if the ratio of A to B is greater than 10, it should be understood to include the case where the ratio of A to B is greater than 9, and also include the case where the ratio of A to B is greater than 11.

[0130] It should be recognized that the dimensions of the layers, regions, films, plates, blocks, columns, convex parts, concave parts, etc. shown in the drawings are given for better understanding and more convenient description, and the present application is not limited to the dimensions shown in the drawings. In order to make the present invention clear, elements irrelevant to the description are omitted from the details of this specification.

[0131] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0132] The present application discloses a battery pack, which includes a shell, a battery module, and a structural member. The battery module is arranged in the shell, and the battery module includes a first battery group and a second battery group, and the first battery group and the second battery group are electrically connected and arranged along a first direction. The structural member is arranged in the shell, and the structural member includes a first part and a second part, along the first direction, the first part is arranged between the first battery group and the second battery group, the second part is connected to the first part, the second part is located on one side of the battery module in the second direction, and the second part is connected to the shell, and the second direction is perpendicular to the first direction.

[0133] The first part of the above-mentioned structural member is arranged between the first battery group and the second battery group, so that the first part conducts the heat between the first battery group and the second battery group, the first part transfers the heat to the second part, and the second part transfers the heat to the shell and dissipates the heat through the shell. The structural member plays the role of leading out and dissipating the heat between the first battery group and the second battery group, thereby facilitating the efficiency of heat dissipation of the first battery group and the second battery group to the outside of the shell, and facilitating the temperature rise of the battery pack.

[0134] Some embodiments of the present application will be described below in conjunction with the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments may be combined with each other.

[0135] See also Figure 1 and Figure 2 The embodiment of the present application provides a battery pack 100, which includes a housing 10, a battery module 20 and a structural member 30. The battery module 20 and the structural member 30 are both arranged in the housing 10. The battery module 20 includes a first battery group 21 and a second battery group 22. The first battery group 21 and the second battery group 22 are electrically connected and arranged along a first direction X. Along the first direction X, part of the structural member 30 is arranged between the first battery group 21 and the second battery group 22, and the structural member 30 is also connected to the housing 10.

[0136] In some embodiments, see Figure 1 and Figure 2 , along the second direction Y, the shell 10 includes a first shell 11, a second shell 12 and a third shell 13 connected in sequence, and the second direction Y is perpendicular to the first direction X. The first shell 11, the second shell 12 and the third shell 13 are arranged to form a receiving cavity 101, and the receiving cavity 101 receives the battery module 20 and the structural member 30. The battery module 20 and the structural member 30 are received in the receiving cavity 101, so that the shell 10 plays a role in protecting the battery module 20 and the structural member 30. In addition, the structural member 30 is received in the receiving cavity 101, which is conducive to reducing the risk of the structural member 30 being impacted and causing damage to the battery module 20, thereby helping to improve the drop resistance of the battery pack 100.

[0137] In some embodiments, the second housing 12 is an annular wall, which is conducive to allowing the first housing 11, the second housing 12 and the third housing 13 to enclose and form the receiving cavity 101. The first housing 11, the second housing 12 and the third housing 13 can be connected by bolt connection, adhesive connection, clamping connection or welding, etc., which is not specifically limited here.

[0138] In some embodiments, see Figure 2 , Figure 7 and Figure 8 The shell 10 is provided with a slide groove 121, which extends along the second direction Y. The slide groove 121 can cooperate with the battery module 20. For example, a part of the battery module 20 is deeply inserted into the slide groove 121, so that the battery module 20 can be installed into the shell 10 along the slide groove 121 during installation, which is conducive to improving the convenience of installing the battery module 20.

[0139] In some embodiments, see Figure 2 The first battery group 21 includes a plurality of first batteries 211 , and the plurality of first batteries 211 are connected in series or in parallel.

[0140] In some embodiments, see Figure 2, the plurality of first batteries 211 are arranged along the second direction Y or the third direction Z, and the first direction X, the second direction Y and the third direction Z are perpendicular to each other.

[0141] As an illustrative example, the first battery group 21 includes ten rows of first batteries 211 arranged along the second direction Y, and each row of first batteries 211 includes six first batteries 211 arranged along the third direction Z, that is, the first battery group 21 includes six columns of first batteries 211 arranged along the third direction Z, and each column of first batteries 211 is connected in parallel and then connected in series with an adjacent column of first batteries 211.

[0142] In some embodiments, see Figure 3 The first battery 211 is a cylindrical battery. The first battery 211 includes a barrel 2111, a cover 2112, and an electrode assembly (not shown). The barrel 2111 and the cover 2112 are conductive, and the barrel 2111 and the cover 2112 are insulated and connected to form a cavity for accommodating the electrode assembly. The electrode assembly includes a separator and a first pole piece and a second pole piece with different polarities. The separator is provided between the first pole piece and the second pole piece, and is used to separate the first pole piece and the second pole piece. One of the first pole piece and the second pole piece is an anode pole piece, and the other is a cathode pole piece. The first pole piece is connected to the barrel 2111 so that the polarity of the barrel 2111 is the same as that of the first pole piece. The second pole piece is connected to the cover 2112 so that the polarity of the cover 2112 is the same as that of the second pole piece, so that the barrel 2111 and the cover 2112 lead out the polarity of the electrode assembly.

[0143] Among them, see Figure 2 Along the first direction X, multiple nickel sheets 23 are provided on the opposite sides of the first battery group 21. Along the first direction X, the cylinders 2111 of the multiple first batteries 211 are in contact with the nickel sheet 23 on one side of the first battery group 21, and the covers 2112 of the multiple first batteries 211 are in contact with the nickel sheet 23 on the other side of the first battery group 21, so that the multiple first batteries 211 can be connected in series or in parallel.

[0144] In some embodiments, see Figure 2 The first battery group 21 further includes a first bracket 212 and a second bracket 213, the first bracket 212 and the second bracket 213 are connected, and a plurality of first batteries 211 are arranged between the first bracket 212 and the second bracket 213. One end of the plurality of first batteries 211 is connected to the first bracket 212, and the other end of the plurality of first batteries 211 is connected to the second bracket 213. The first bracket 212 and the second bracket 213 are conducive to limiting the movement of the first batteries 211, improving the stability of the installation of the first batteries 211, and the first bracket 212 and the second bracket 213 are also conducive to protecting the first batteries 211.

[0145] In some embodiments, see Figure 2 and Figure 4 Along the third direction Z, the second bracket 213 includes a first wall 2131 and a second wall 2132 that are oppositely arranged.

[0146] In some embodiments, see Figure 2 The second battery group 22 includes a plurality of second batteries 221 , and the plurality of second batteries 221 are connected in series or in parallel.

[0147] In some embodiments, see Figure 2 , a plurality of second batteries 221 are arranged along the second direction Y or the third direction Z.

[0148] In some embodiments, the second battery 221 is a cylindrical battery. The structure of the second battery 221 can refer to the above-mentioned embodiment of the cylindrical first battery 211, which will not be repeated here.

[0149] In addition, the number, arrangement and series-parallel connection of the plurality of second batteries 221 may refer to the above-mentioned implementation of the first battery 211, and the specific number, arrangement and series-parallel connection may be adjusted according to the actual use requirements of the battery pack 100, which will not be repeated here.

[0150] In some embodiments, see Figure 2 The second battery group 22 further includes a third bracket 222 and a fourth bracket 223, the third bracket 222 and the fourth bracket 223 are connected, and a plurality of second batteries 221 are arranged between the third bracket 222 and the fourth bracket 223. One end of the plurality of second batteries 221 is connected to the third bracket 222, and the other end of the plurality of second batteries 221 is connected to the fourth bracket 223. The third bracket 222 and the fourth bracket 223 are conducive to limiting the movement of the second batteries 221, improving the stability of the installation of the second batteries 221, and the third bracket 222 and the fourth bracket 223 are also conducive to protecting the second batteries 221.

[0151] In some embodiments, see Figure 2 and Figure 4 Along the third direction Z, the third bracket 222 includes a third wall 2221 and a fourth wall 2222 that are oppositely arranged.

[0152] In some embodiments, see Figure 2 and Figure 5 , along the first direction X, the first bracket 212, the second bracket 213, the third bracket 222 and the fourth bracket 223 are sequentially arranged and connected. The first battery group 21 and the second battery group 22 are arranged along the first direction X, which is conducive to limiting the relative movement of the first battery group 21 and the second battery group 22, and is conducive to improving the anti-drop performance of the battery pack 100.

[0153] In some embodiments, see Figure 2 The battery module 20 further includes a first insulating sheet 24 and a second insulating sheet 25. Along the first direction X, the first insulating sheet 24 is disposed between the first bracket 212 and the housing 10, and the second insulating sheet 25 is disposed between the fourth bracket 223 and the housing 10. The first insulating sheet 24 and the second insulating sheet 25 are conducive to insulating the first battery group 21 and the second battery group 22 from the housing 10, and are conducive to reducing the risk of short circuit between the first battery group 21 and the second battery group 22.

[0154] In some embodiments, see Figure 2 and Figure 5 and Figure 6 The structural member 30 includes a first part 31 and a second part 32. Along the first direction X, the first part 31 is arranged between the first battery group 21 and the second battery group 22, and the second part 32 is connected to the first part 31. The second part 32 is located on one side of the battery module 20 in the second direction Y, and the second part 32 is connected to the shell 10.

[0155] The first part 31 of the structural member 30 is disposed between the first battery group 21 and the second battery group 22, so that the first part 31 conducts the heat between the first battery group 21 and the second battery group 22, the first part 31 transfers the heat to the second part 32, and the second part 32 transfers the heat to the housing 10 and dissipates the heat through the housing 10. The structural member 30 draws out the heat between the first battery group 21 and the second battery group 22 and transfers it to the housing 10, which is beneficial to improve the efficiency of heat dissipation of the first battery group 21 and the second battery group 22 to the outside of the housing 10, and is beneficial to reduce the temperature rise of the battery pack 100. In addition, the second part 32 of the structural member 30 is disposed in the housing 10, so that when the battery pack 100 is impacted by falling or the like, the impact first acts on the housing 10, and the local deformation of the housing 10 absorbs part of the impact force, which is beneficial to alleviate the impact force on the second part 32, thereby reducing the risk of the structural member 30 driving the first battery group 21 and the second battery group 22 to move.

[0156] In some embodiments, see Figure 2 and Figure 5The battery pack 100 further includes a fastener 40, which is disposed through the first battery group 21, the first part 31 and the second battery group 22, and the fastener 40 connects the first battery group 21, the first part 31 and the second battery group 22. The fastener 40 fixes the first battery group 21, the first part 31 and the second battery group 22 as a whole, which is conducive to limiting the relative movement between the first battery group 21, the first part 31 and the second battery group 22, and the second part 32 connected to the first part 31 is also connected to the shell 10, which is conducive to limiting the movement of the first battery group 21, the first part 31 and the second battery group 22 relative to the shell 10, so that the structural member 30 plays the role of supporting the skeleton, thereby improving the impact resistance and vibration resistance of the battery pack 100, and improving the reliability of the battery pack 100.

[0157] In some embodiments, see Figure 2 and Figure 5 , along the first direction X, the first bracket 212, the second bracket 213, the first portion 31, the third bracket 222 and the fourth bracket 223 are arranged and connected in sequence. The fastener 40 can be inserted into the first bracket 212, the second bracket 213, the first portion 31, the third bracket 222 and the fourth bracket 223 to connect the first battery group 21, the first portion 31 and the second battery group 22.

[0158] In some embodiments, the fastener 40 may be a long screw, which passes through the first bracket 212 , the second bracket 213 , the first portion 31 , the third bracket 222 and the fourth bracket 223 , and is threadedly connected to the first bracket 212 or the fourth bracket 223 .

[0159] In some embodiments, the first bracket 212 and the second bracket 213 may also be fastened and connected by a screw, which is beneficial to improve the stability of the connection between the first bracket 212 and the second bracket 213. Of course, the first bracket 212 and the second bracket 213 may also be connected by a buckle, which is not specifically limited here.

[0160] In some embodiments, see Figure 7 and Figure 8 The first part 31 is provided with a slide rail 311, which extends along the second direction Y, and part of the slide rail 311 is arranged in the slide groove 121. When the battery module 20 is installed in the housing 10, the slide rail 311 cooperates with the slide groove 121 to make the structural member 30 slide relative to the housing 10, and the structural member 30 drives the first battery group 21 and the second battery group 22 to slide into the housing 10. The cooperation between the slide rail 311 and the slide groove 121 is conducive to improving the convenience of installing the battery module 20, and is also conducive to limiting the movement of the structural member 30 relative to the housing 10 in the first direction X, thereby limiting the movement of the battery module 20 relative to the housing 10 in the first direction X, thereby improving the impact resistance of the battery pack 100.

[0161] In some embodiments, slide rails 311 are provided on both sides of the first part 31 along the third direction Z, the number of slide grooves 121 is equal to the number of slide rails 311, and each slide rail 311 extends into a slide groove 121, which is beneficial to further improve the smoothness of the installation of the battery module 20, and is also beneficial to further limit the movement of the battery module 20 relative to the shell 10 in the first direction X, thereby improving the impact resistance of the battery pack 100.

[0162] In some embodiments, see Figures 6 to 8 The slide groove 121 is provided in the second shell 12 , and the slide rail 311 of the first part 31 extends into the slide groove 121 of the second shell 12 . After the battery module 20 is installed in the shell 10 , the second part 32 is connected to the first shell 11 of the shell 10 .

[0163] In some embodiments, the second portion 32 and the first housing 11 are detachably connected, for example, by bolts.

[0164] In some embodiments, the second portion 32 and the first shell 11 may be connected by welding, bonding, or the like.

[0165] In some embodiments, an intermediate piece is provided between the second portion 32 and the first shell 11 .

[0166] In some embodiments, thermal conductive cotton (not shown) is provided between the second part 32 and the first shell 11, and the second part 32 and the first shell 11 are fixedly connected by bolts. The thermal conductive cotton can fill the gap between the second part 32 and the first shell 11, which is beneficial to the heat exchange efficiency between the second part 32 and the first shell 11, and the thermal conductive surface also plays a buffering role.

[0167] In some embodiments, a thermally conductive adhesive is provided between the second portion 32 and the first shell 11, and the second portion 32 and the first shell 11 are bonded together by the thermally conductive adhesive. The thermally conductive adhesive can fill the gap between the second portion 32 and the first shell 11, which is beneficial to the heat exchange efficiency between the second portion 32 and the first shell 11. The thermally conductive adhesive is also beneficial to reducing the use of fasteners such as bolts, which is beneficial to saving costs, and also reduces drilling, which is beneficial to improving the sealing of the battery pack 100.

[0168] In some other embodiments, see Figure 6 , the second portion 32 is in direct contact with the shell 10, which is beneficial to improving the heat exchange efficiency between the second portion 32 and the shell 10. In some embodiments, the second portion 32 is in direct contact with the first shell 11.

[0169] In some embodiments, see Fig. 9 and Fig.10The first part 31 is provided with a plurality of grooves 312, the grooves 312 extend along the third direction Z, and the plurality of grooves 312 are arranged along the second direction Y. The provision of the grooves 312 is conducive to reducing the overall weight of the first part 31, thereby reducing the weight of the entire battery pack 100, and is conducive to improving the energy density of the battery pack 100. In addition, compared with the solution of thinning the first part 31 as a whole, the solution of providing the grooves 312 is also conducive to improving the structural strength of the first part 31, and is conducive to improving the ability of the structural member 30 to limit the movement of the first battery group 21 and the second battery group 22.

[0170] In some other embodiments, see Fig.11 The first part 31 is provided with a plurality of grooves 312, the grooves 312 extend along the second direction Y, and the plurality of grooves 312 are arranged along the third direction Z. The provision of the grooves 312 is conducive to reducing the overall weight of the first part 31, thereby reducing the weight of the entire battery pack 100, and is conducive to improving the energy density of the battery pack 100. In addition, compared with the solution of thinning the first part 31 as a whole, the solution of providing the grooves 312 is also conducive to improving the structural strength of the first part 31, and is conducive to improving the ability of the structural member 30 to limit the movement of the first battery group 21 and the second battery group 22.

[0171] In some embodiments, the groove 312 is disposed on a side of the first portion 31 facing the first battery group 21 , the groove 312 may also be disposed on a side of the first portion 31 facing the second battery group 22 , or the groove 312 may also be disposed on both a side of the first portion 31 facing the first battery group 21 and a side of the first portion 31 facing the second battery group 22 .

[0172] In other embodiments, the groove 312 may also extend along other directions, which are not listed here one by one.

[0173] In some embodiments, see Figure 2 and Fig.10 and Fig.12 The battery pack 100 further includes a first heat conductive member 50. The first heat conductive member 50 is disposed between the first battery group 21 and the first portion 31 along the first direction X. The first heat conductive member 50 is in contact with both the first battery group 21 and the first portion 31. The thermal conductivity of the first heat conductive member 50 is less than that of the first portion 31. The first heat conductive member 50 is conducive to filling the gap between the first portion 31 and the first battery group 21, thereby facilitating the improvement of the heat exchange efficiency between the first battery group 21 and the first portion 31, and further improving the heat dissipation efficiency between the first battery group 21 and the second battery group 22.

[0174] As an illustrative example, the material of the first heat conductive member 50 includes at least one of thermal conductive silicone grease, thermal conductive silica gel, and thermal conductive cotton, which is conducive to deforming the first heat conductive member 50, thereby facilitating the first heat conductive member 50 to fill the gap between the first part 31 and the first battery group 21. The material of the first part 31 includes at least one of aluminum, copper, and iron.

[0175] In some other embodiments, see Figure 2 and Fig.10 and Fig.12 The battery pack 100 also includes a first heat conductive member 50. Along the first direction X, the first heat conductive member 50 is arranged between the first battery group 21 and the first part 31. The first heat conductive member 50 is in contact with both the first battery group 21 and the first part 31. The thermal conductivity of the first heat conductive member 50 is greater than the thermal conductivity of the first part 31, which is beneficial to improving the heat exchange efficiency between the first battery group 21 and the first part 31, and is beneficial to further improving the heat dissipation efficiency of the first battery group 21 and the second battery group 22.

[0176] As an illustrative example, the material of the first heat-conducting member 50 includes at least one of thermal grease, thermal silica gel, and thermally conductive cotton, and the material of the first part 31 includes plastic, which is conducive to achieving a thermal conductivity of the first heat-conducting member 50 greater than the thermal conductivity of the first part 31, and the material of the first part 31 includes plastic, which is conducive to reducing the overall weight of the first part 31.

[0177] In some embodiments, see Figure 2 The battery pack 100 further includes a second heat conducting member 60, which is disposed between the second battery group 22 and the first portion 31 along the first direction X, and the second heat conducting member 60 is in contact with both the second battery group 22 and the first portion 31. The specific configuration of the second heat conducting member 60 may refer to the above-mentioned embodiment of the first heat conducting member 50, and will not be described in detail here.

[0178] In the embodiment where the first heat conducting member 50 and the second heat conducting member 60 are provided, the groove 312 can also provide a space for the first heat conducting member 50 and the second heat conducting member 60 to deform, which is beneficial to improving the impact resistance of the battery pack.

[0179] In some embodiments, see Fig.13 The battery pack 100 further includes a circuit board 70, which is electrically connected to the battery module 20. The circuit board 70 is disposed on one side of the battery module 20 along the second direction Y, and the second portion 32 is disposed on a side of the battery module 20 away from the circuit board 70. The second portion 32 is disposed on a side of the battery module 20 away from the circuit board 70, which is conducive to allowing the structural member 30 to transfer heat between the first battery group 21 and the second battery group 22 to the side of the battery module 20 away from the circuit board 70, thereby reducing the influence of the heat generated by the first battery group 21 and the second battery group 22 on the circuit board 70.

[0180] In some embodiments, see Figure 2 and Figures 13 to 15 , along the first direction X, the projection of the first battery group 21 is located within the projection of the first portion 31, and the projection of the second battery group 22 is located within the projection of the first portion 31. Along the second direction Y, the projection of the second portion 32 overlaps with the projection of the first battery group 21, and the projection of the second portion 32 overlaps with the projection of the second battery group 22.

[0181] It can be understood that the projection of the first battery group 21 is located within the projection of the first part 31, and the projection of the second battery group 22 is located within the projection of the first part 31, which is beneficial to increase the heat exchange area between the first part 31 and the first battery group 21 and the second battery group 22. Along the second direction Y, the projection of the second part 32 overlaps with the projection of the first battery group 21, which is beneficial to increase the contact area between the second part 32 and the first shell 11, and is beneficial to improve the efficiency of the structural member 30 in transferring heat to the shell 10, thereby helping to improve the heat dissipation efficiency of the first battery group 21 and the second battery group 22.

[0182] In some embodiments, see Figures 13 to 16 The battery module 20 further includes a connector 26, which electrically connects the first battery group 21 and the second battery group 22. Along the third direction Z, a first opening 3141 is provided on one side of the first portion 31, which passes through along the first direction X, and the connector 26 is inserted into the first opening 3141. The provision of the first opening 3141 is conducive to allowing the first portion 31 to avoid the conductive connector 26, and when the first portion 31 is made of conductive metal, it is conducive to reducing the risk of the connector 26 contacting the first portion 31 and causing a short circuit.

[0183] In some embodiments, see Figures 13 to 16 A portion of the connector 26 is fixed to the first wall 2131 , and another portion of the connector 26 is fixed to the third wall 2221 , which is beneficial to improving the stability of the installation of the connector 26 , and the connector 26 also plays a role in inhibiting the movement of the first battery group 21 and the second battery group 22 .

[0184] In some embodiments, see Figures 12 to 16 , along the third direction Z, the first portion 31 has a first side 313 and a second side 314 that are oppositely arranged, the first opening 3141 is arranged at the second side 314, and the connecting member 26 does not extend beyond the second side 314 along the third direction Z. Along the third direction Z, the connecting member 26 does not extend beyond the second side 314, so that the first portion 31 extends beyond the connecting member 26 in the third direction Z, which is beneficial to protecting the connecting member 26 and reducing the risk of direct contact between the connecting member 26 and components such as the housing 10.

[0185] In some embodiments, along the third direction Z, the maximum distance between the second side 314 and the first battery group 21 is D1, and the maximum distance between the side of the connector 26 facing away from the first battery group 21 and the first battery group 21 is D2, satisfying D1≥D2. When the maximum distance D1 between the second side 314 and the first battery group 21 and the maximum distance D2 between the side of the connector 26 facing away from the first battery group 21 and the first battery group 21 satisfy the condition D1≥D2, the first portion 31 is made to extend beyond the connector 26 in the third direction Z, which is beneficial to protecting the connector 26 and reducing the risk of direct contact between the connector 26 and components such as the housing 10.

[0186] It can be understood that when the connector 26 is fixedly connected to the first wall 2131 and the third wall 2221 , along the third direction Z, the thickness of the connector 26 is equal to the maximum distance D2 between the side of the connector 26 away from the first battery group 21 and the first battery group 21 .

[0187] In some embodiments, see Fig.12 , Figures 17 to 19 The battery pack 100 further includes a first heat conductive member 50. Along the first direction X, the first heat conductive member 50 is disposed between the first battery group 21 and the first portion 31. The first heat conductive member 50 contacts both the first battery group 21 and the first portion 31. The thermal conductivity of the first heat conductive member 50 is less than that of the first portion 31. Along the first direction X, the projection of the first battery group 21 is located within the projection of the first heat conductive member 50, and the projection of the second battery group 22 is located within the projection of the first heat conductive member 50. Along the third direction Z, a second opening 51 is provided on one side of the first heat conductive member 50 that passes through along the first direction X. When viewed along the first direction X, the second opening 51 is located within the first opening 3141. The connector 26 is provided through the first opening 3141 and the second opening 51. When viewed along the first direction X, the second opening 51 is located inside the first opening 3141, and the connector 26 is inserted through the first opening 3141 and the second opening 51. In extreme cases, when relative displacement occurs between the connector 26 and the first portion 31, the connector 26 first contacts the insulating first heat-conducting member 50, which helps to reduce the risk of short circuit caused by contact between the connector 26 and the first portion 31 made of conductive metal.

[0188] In some embodiments, see Fig.16 and Fig. 20The first battery group 21 further includes a first protective member 214, which includes a first section 2141 and a second section 2142. The first section 2141 is connected to the first wall 2131, and the second section 2142 is connected to the first section 2141. The plane where the second section 2142 is located is parallel to the plane where the first wall 2131 is located. When the battery module 20 contacts other components, the second section 2142 of the first protective member 214 can contact other components first, which is beneficial to improving the protective effect of the first battery group 21. The arrangement of the first section 2141 and the second section 2142 enables the second section 2142 to deform when contacting other components and play a buffering role, further improving the protective effect of the first battery group 21.

[0189] In some embodiments, see Fig.16 and Fig. 20 The battery module 20 further includes a connector 26, which electrically connects the first battery group 21 and the second battery group 22. The number of the first protective members 214 is multiple, and the multiple first protective members 214 are arranged along the second direction Y. Along the second direction Y, the connector 26 is arranged between two adjacent first protective members 214, which is conducive to allowing the first protective members 214 to protect the connector 26. When the battery module 20 contacts other components, the first protective member 214 contacts other components first, reducing the risk of the connector 26 contacting other components. In addition, the two first protective members 214 are also conducive to limiting the movement of the connector 26 in the second direction Y, thereby improving the reliability of the battery pack 100.

[0190] In some embodiments, see Fig.16 , Fig. 20 as well as Fig.21 Along the third direction Z, the connecting member 26 does not exceed the second section 2142, so that the first protective member 214 exceeds the connecting member 26 in the third direction Z, which is beneficial to protecting the connecting member 26 and reducing the risk of direct contact between the connecting member 26 and components such as the housing 10.

[0191] In some embodiments, along the third direction Z, the maximum distance between the side of the second section 2142 facing away from the first wall 2131 and the first wall 2131 is D3, and the maximum distance between the side of the connector 26 facing away from the first wall 2131 and the first wall 2131 is D4, satisfying: D3≥D4. When the maximum distance D3 between the side of the second section 2142 facing away from the first wall 2131 and the first wall 2131 and the maximum distance D4 between the side of the connector 26 facing away from the first wall 2131 and the first wall 2131 satisfy the condition D3≥D4, the first protective member 214 is made to extend beyond the connector 26 in the third direction Z, which is beneficial to protecting the connector 26 and reducing the risk of direct contact between the connector 26 and components such as the housing 10.

[0192] In some embodiments, see Fig.16 and Fig. 20 The second battery group 22 further includes a second protective member 224, the second protective member 224 includes a third section 2241 and a fourth section 2242, the third section 2241 is connected to the third wall 2221, the fourth section 2242 is connected to the third section 2241, and the plane where the fourth section 2242 is located is parallel to the plane where the third wall 2221 is located. The configuration of the second protective member 224 can refer to the above-mentioned implementation of the first protective member 214, and will not be repeated here.

[0193] In some embodiments, see Fig. 20 and Fig. 22 , along the first direction X, the second section 2142 has a first edge 214a away from the third bracket 222, and the fourth section 2242 has a second edge 224a away from the second bracket 213. In the first direction X, the connector 26 does not extend beyond the first edge 214a, and the connector 26 does not extend beyond the second edge 224a. This arrangement is conducive to allowing the first protective member 214 and the second protective member 224 to jointly protect the two sides of the connector 26 in the first direction X, thereby reducing the risk of direct contact between the connector 26 and components such as the housing 10.

[0194] In the drawings, X' indicates a first direction X that is perpendicular to the paper surface and faces outward; Y' indicates a second direction Y that is perpendicular to the paper surface and faces outward; and Z' indicates a third direction Z that is perpendicular to the paper surface and faces outward.

[0195] See also Fig.23 The embodiment of the present application also provides an electric device 1000, which includes the electrochemical device in any of the above embodiments. The electric device 1000 adopts the technical solution of any of the above embodiments of the electrochemical device, and therefore at least has the beneficial effects brought by the technical solution of any of the above embodiments of the electrochemical device, which will not be repeated here.

[0196] In some embodiments, see Fig.23 The electrical equipment 1000 further includes an equipment body 200 , and the electrochemical device is installed in the equipment body 200 .

[0197] Among them, the electrical equipment 1000 can be a drone, an electric two-wheeled vehicle or a cleaning robot, an energy storage device, an electric tool, etc.

[0198] In addition, those skilled in the art should recognize that the above embodiments are only used to illustrate the present application, and are not intended to limit the present application. As long as they are within the essential scope of the present application, appropriate changes and modifications to the above embodiments are within the scope disclosed in the present application.

Claims

1. A battery pack, characterized in that: include: case; A battery module is disposed in the housing, the battery module comprising a first battery group and a second battery group, the first battery group and the second battery group are electrically connected and arranged along a first direction; A structural member is arranged in the shell, and the structural member includes a first part and a second part. Along the first direction, the first part is arranged between the first battery group and the second battery group, and the second part is connected to the first part. The second part is located on one side of the battery module in the second direction, and the second part is connected to the shell, and the second direction is perpendicular to the first direction.

2. The battery pack according to claim 1, characterized in that: The housing is provided with a slide groove, the slide groove extends along the second direction, the first part is provided with a slide rail, the slide rail extends along the second direction, and part of the slide rail is arranged in the slide groove.

3. The battery pack according to claim 2, characterized in that: The battery pack includes a fastener, the fastener is penetrated through the first battery group, the first part and the second battery group, and the fastener connects the first battery group, the first part and the second battery group.

4. The battery pack according to claim 3, characterized in that: Along the second direction, the housing includes a first housing, a second housing and a third housing connected in sequence, the first housing, the second housing and the third housing are surrounded to form a receiving cavity, and the receiving cavity receives the battery module and the structural member; The slide groove is arranged on the second shell, and the second part is connected to the first shell.

5. The battery pack according to claim 1, characterized in that: The first portion is provided with a plurality of grooves; The groove extends along the second direction, and a plurality of the grooves are arranged along the third direction; or, The groove extends along the third direction, and a plurality of the grooves are arranged along the second direction; The third direction is perpendicular to the first direction and the second direction.

6. The battery pack according to claim 1, characterized in that: The battery pack further includes a first heat conductive member, which is disposed between the first battery group and the first portion along the first direction, and the first heat conductive member is in contact with both the first battery group and the first portion; The thermal conductivity of the first heat-conducting member is greater than the thermal conductivity of the first portion; Alternatively, the thermal conductivity of the first heat conducting member is smaller than the thermal conductivity of the first portion.

7. The battery pack according to claim 6, characterized in that: The thermal conductivity of the first heat-conducting member is smaller than that of the first part, and the material of the first part includes at least one of aluminum, copper, and iron, and the material of the first heat-conducting member includes at least one of thermal grease, thermal silica gel, and thermal cotton.

8. The battery pack according to any one of claims 1 to 7, characterized in that: The battery pack also includes a circuit board, which is electrically connected to the battery module. Along the second direction, the circuit board is arranged on one side of the battery module, and the second part is arranged on a side of the battery module away from the circuit board.

9. The battery pack according to claim 1, characterized in that: Along the first direction, the projection of the first battery group is located within the projection of the first portion, and the projection of the second battery group is located within the projection of the first portion; Along the second direction, a projection of the second portion overlaps with the first battery group, and a projection of the second portion overlaps with the second battery group.

10. The battery pack according to claim 9, characterized in that: The battery module further includes a connector, the connector electrically connecting the first battery group and the second battery group; Along the third direction, one side of the first part is provided with a first opening penetrating along the first direction, the connecting member is passed through the first opening, and the third direction is perpendicular to the first direction and the second direction.

11. The battery pack according to claim 10, characterized in that: Along the third direction, the first part has a first side and a second side that are oppositely arranged, the first opening is arranged on the second side, and along the third direction, the connecting member does not exceed the second side.

12. The battery pack according to claim 10, characterized in that: The battery pack further includes a first heat conductive member, which is disposed between the first battery group and the first portion along the first direction, the first heat conductive member is in contact with both the first battery group and the first portion, and the thermal conductivity of the first heat conductive member is less than the thermal conductivity of the first portion; Along the first direction, the projection of the first battery group is located within the projection of the first heat conductor, and the projection of the second battery group is located within the projection of the first heat conductor. Along the third direction, one side of the first heat conductor is provided with a second opening that passes through the first direction, and when viewed along the first direction, the second opening is located within the first opening, and the connecting member is provided through the first opening and the second opening.

13. The battery pack according to claim 1, characterized in that: The first battery group includes a first bracket, a second bracket and a plurality of first batteries, one end of the plurality of first batteries is connected to the first bracket, and the other end of the plurality of first batteries is connected to the second bracket; the second battery group includes a third bracket, a fourth bracket and a plurality of second batteries, one end of the plurality of second batteries is connected to the third bracket, and the other end of the plurality of second batteries is connected to the fourth bracket; Along the first direction, the first bracket, the second bracket, the first part, the third bracket and the fourth bracket are arranged and connected in sequence.

14. The battery pack according to claim 13, characterized in that: The second bracket has a first wall and a second wall arranged opposite to each other in a third direction, and the third direction is perpendicular to the first direction and the second direction in pairs; The first battery group further includes a first protective member, which includes a first section and a second section, wherein the first section is connected to the first wall, the second section is connected to the first section, and a plane where the second section is located is parallel to a plane where the first wall is located.

15. The battery pack according to claim 14, characterized in that: The battery module also includes a connector, which electrically connects the first battery group and the second battery group. There are multiple first protective members, and the multiple first protective members are arranged along the second direction. Along the second direction, the connector is arranged between two adjacent first protective members.

16. The battery pack according to claim 15, characterized in that: Along the third direction, the connecting member does not extend beyond the second section.

17. The battery pack according to claim 15, characterized in that: Along the first direction, the second section has a first edge facing away from the third bracket; The third bracket has a third wall and a fourth wall arranged opposite to each other in the third direction; the second battery group includes a second protective member, the second protective member includes a third section and a fourth section, the third section is connected to the third wall, the fourth section is connected to the third section, the plane where the fourth section is located is parallel to the plane where the third wall is located, and along the first direction, the fourth section has a second edge away from the second bracket; In the first direction, the connecting member does not extend beyond the first edge, and the connecting member does not extend beyond the second edge.

18. An electrical equipment, characterized in that: Comprising a battery pack as claimed in any one of claims 1 to 17.

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