Battery module and electric device

Abstract

The application discloses a battery module and a power consumption device. The battery module comprises a battery pack and a first conductive member. The first conductive member comprises a first connecting portion, a first functional portion and a second connecting portion which are sequentially connected on one side of the battery pack, and the first connecting portion is electrically connected with the battery pack. The first functional portion comprises a first portion and a first protrusion. The first portion connects the first connecting portion and the second connecting portion, and the first protrusion extends from the first connecting portion to the second connecting portion along a second direction. The first protrusion is separated from the first portion and the second connecting portion, so that the first functional portion is more easily fused, the risk that the first functional portion is not timely fused when the current is too large is reduced, and the first protrusion improves the structural strength of the first functional portion, thereby reducing the risk that the first functional portion is broken when the battery module is impacted by external force.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of batteries, in particular to a battery module and a power consumption device. BACKGROUND

[0002] The battery module includes a battery pack with multiple batteries. In the process of charging and discharging the battery pack, if an extreme situation such as short circuit occurs, the current increases sharply, causing the conductive structure through which the current flows to heat up. Based on this principle, a conductive piece that can be melted is usually arranged between the battery pack and other components to achieve electrical connection. The conductive piece is melted in the extreme situation of sharp current increase, thereby protecting the battery pack.

[0003] The structural strength of the currently arranged conductive piece is not reasonable, and there is a situation that the disconnection time of the conductive piece is not appropriate, which is not conducive to improving the reliability of the battery module. SUMMARY

[0004] Therefore, it is necessary to provide a battery module that is conducive to improving reliability.

[0005] Some embodiments of the present application provide a battery module including a battery pack and a first conductive piece. An insulating piece is connected to the battery pack and arranged on one side of the battery pack in a first direction. The first conductive piece includes a first connecting portion, a second connecting portion, and a first functional portion. In the first direction, the first connecting portion, the second connecting portion, and the first functional portion are located on one side of the battery pack. The first connecting portion is electrically connected to the battery pack. The first connecting portion and the second connecting portion are arranged in a second direction perpendicular to the first direction. The first functional portion is arranged between the first connecting portion and the second connecting portion. The first functional portion includes a first portion and a first protruding portion. The first portion connects the first connecting portion and the second connecting portion. The first protruding portion extends from the first connecting portion toward the second connecting portion in the second direction. The first protruding portion is spaced apart from the first portion and the second connecting portion.

[0006] In the above-mentioned embodiments, the first protruding portion is spaced apart from the first portion and the second connecting portion, so that the first functional portion is more likely to be melted, thereby reducing the risk that the first functional portion is not melted in time when the current is too large. The arrangement of the first protruding portion is conducive to improving the structural strength of the first functional portion itself and reducing the risk of fracture of the first functional portion caused by external force, so that the first portion is disconnected at an appropriate time, thereby improving the reliability of the battery module.

[0007] In some embodiments, the first functional portion further includes a second portion. The second portion connects the first connecting portion and the second connecting portion. The second portion is spaced apart from the first portion and the first protruding portion.

[0008] The second part in the above embodiment is configured to improve the structural strength of the first functional part, improve the uniformity of force received by the first functional part, and reduce the risk of fracture of the first functional part caused by external force.

[0009] In some embodiments, the first functional part further comprises a second protruding part extending from the second connecting part to the first connecting part along a second direction, and the second protruding part is spaced apart from the first part, the second part, the first connecting part, and the first protruding part.

[0010] The second protruding part in the above embodiment is configured to further improve the structural strength of the first functional part, improve the uniformity of force received by the first functional part, and increase the damping and buffering effect, thereby reducing the risk of fracture of the first functional part caused by external force.

[0011] In some embodiments, along a third direction, the first protruding part and the second protruding part are located between the first part and the second part, and the third direction is perpendicular to the first direction and the second direction.

[0012] The first protruding part and the second protruding part in the above embodiment are located between the first part and the second part, which is configured to increase the distance between the first part and the second part in the third direction, so that the first part and the second part are not concentrated in one place, thereby reducing the risk of disconnection of the first connecting part and the second connecting part caused by impact force. Moreover, the first protruding part and the second protruding part are located between the first part and the second part, so that the part capable of connecting the first connecting part and the second connecting part and the part not connecting the first connecting part and the second connecting part are staggered, improving the uniformity of force received by the first functional part, thereby reducing the risk of fracture of the first functional part caused by external force.

[0013] In some embodiments, along the third direction, the first protruding part has a first distance from the first part and a second distance from the second part, and the first distance is different from the second distance.

[0014] The first distance and the second distance in the above embodiment are different, so that the first protruding part is closer to one of the first part and the second part, and farther away from the other one of the first part and the second part. The one of the first part and the second part farther away from the first protruding part is less likely to be fused with the first protruding part when it is fused, thereby reducing the risk of fusion of the first functional part but no disconnection of the first connecting part and the second connecting part. The one of the first part and the second part closer to the first protruding part is less likely to be fractured by external force due to the damping and buffering effect provided by the first protruding part.

[0015] In some embodiments, along the third direction, the second protruding part has a third distance from the first part and a fourth distance from the second part, and the third distance is different from the fourth distance.

[0016] The third distance and the fourth distance in the above embodiment are different, so that the second protrusion is closer to one of the first part and the second part and farther from the other one of the first part and the second part. The one of the first part and the second part farther from the second protrusion is less likely to be fused with the second protrusion when being fused, so as to reduce the risk that the first functional part is fused but the first connecting part and the second connecting part are not disconnected. The one of the first part and the second part closer to the second protrusion is less likely to be broken by external force due to the damping and buffering effect of the second protrusion.

[0017] In some embodiments, the first distance is different from the third distance, and the second distance is different from the fourth distance.

[0018] In some embodiments, a projection of the first protrusion in the second direction partially overlaps a projection of the second protrusion in the second direction.

[0019] The projection of the first protrusion in the second direction partially overlaps the projection of the second protrusion in the second direction in the above embodiment, and the first protrusion and the second protrusion are not completely aligned, which is beneficial to improve the uniformity of stress of the first functional part, and further beneficial to reduce the risk that the first functional part is broken by external force.

[0020] In some embodiments, the battery module further comprises a first thermal insulation layer, and the first thermal insulation layer covers the first functional part.

[0021] The first thermal insulation layer in the above embodiment is beneficial to reduce the risk that the first functional part is fused at too high a temperature and affects the battery pack. The first thermal insulation layer covers the first functional part and also covers the fused part, which is beneficial to reduce the risk that the fused part falls into the battery pack.

[0022] In some embodiments, the battery module further comprises an insulating piece, and the insulating piece is arranged between the first conductive piece and the battery pack along the first direction.

[0023] In the above embodiment, the insulating piece is arranged between the first conductive piece and the battery pack, which is beneficial to reduce the risk that parts of different polarities on the first conductive piece and the battery pack are in contact and short-circuit.

[0024] In some embodiments, the insulating piece comprises first and second faces facing opposite directions, the second face faces the battery pack, and the first connecting part, the second connecting part and the first functional part are located on the first face.

[0025] The second surface of the above-mentioned embodiments faces the battery pack, and the first connecting portion, the second connecting portion, and the first functional portion are located on the first surface, which is conducive to improving the structural compactness of the battery module and enabling the insulating member to support the first connecting portion, the first functional portion, and the second connecting portion, thereby reducing the displacement of the stress between the first connecting portion, the first functional portion, and the second connecting portion when the battery module is impacted, and further reducing the risk of damage to the first connecting portion, the first functional portion, and the second connecting portion.

[0026] In some embodiments, the battery module further comprises a second conductive member, the second conductive member comprising a third connecting portion, a fourth connecting portion, and a second functional portion, the third connecting portion, the fourth connecting portion, and the second functional portion being located on one side of the battery pack along a first direction, the fourth connecting portion being electrically connected to the battery pack, the third connecting portion and the fourth connecting portion being spaced apart along a second direction, and the second functional portion being arranged between the first connecting portion and the second connecting portion. The second functional portion comprises a third portion, a fourth portion, a third protrusion, and a fourth protrusion. The third portion connects the third connecting portion and the fourth connecting portion. The fourth portion connects the third connecting portion and the fourth connecting portion, and the third portion is separated from the fourth portion. The third protrusion extends from the third connecting portion to the fourth connecting portion along the second direction, and the third protrusion is separated from the third portion, the fourth portion, and the fourth connecting portion. The fourth protrusion extends from the fourth connecting portion to the third connecting portion along the second direction, and the fourth protrusion is separated from the third portion, the fourth portion, the third protrusion, and the third connecting portion. Along a third direction, the third protrusion and the fourth protrusion are located between the third portion and the fourth portion, and the third direction is perpendicular to the first direction and the second direction.

[0027] In the above-mentioned embodiments, the third protrusion is separated from the third portion and the fourth connecting portion, which makes the second functional portion more easily fused, thereby reducing the risk of the second functional portion not being fused in time when the current is too large, and improving the reliability of the battery module. The third protrusion is conducive to improving the structural strength of the second functional portion itself and plays a role in shock absorption and buffering, thereby reducing the risk of the second functional portion being broken under external force and further improving the reliability of the battery module.

[0028] In some embodiments, along the third direction, the third protrusion has a fifth distance from the third portion, and the third protrusion has a sixth distance from the fourth portion, and the fifth distance is different from the sixth distance.

[0029] The fifth distance and the sixth distance in the above embodiment are different, so that the third protrusion is closer to one of the third part and the fourth part and farther from the other one of the third part and the fourth part. The one of the third part and the fourth part farther from the third protrusion is less likely to be fused with the third protrusion when being fused, so as to reduce the risk that the second functional part is fused but the third connecting part and the fourth connecting part are not disconnected. The one of the third part and the fourth part closer to the third protrusion is less likely to be broken by external force due to the damping and buffering effect provided by the third protrusion.

[0030] In some embodiments, the fourth protrusion is farther from the third part than from the fourth part along the third direction.

[0031] The seventh distance and the eighth distance in the above embodiment are different, so that the fourth protrusion is closer to one of the third part and the fourth part and farther from the other one of the third part and the fourth part. The one of the third part and the fourth part farther from the fourth protrusion is less likely to be fused with the fourth protrusion when being fused, so as to reduce the risk that the second functional part is fused but the third connecting part and the fourth connecting part are not disconnected. The one of the third part and the fourth part closer to the fourth protrusion is less likely to be broken by external force due to the damping and buffering effect provided by the fourth protrusion.

[0032] In some embodiments, a projection of the third protrusion on the second direction partially overlaps a projection of the fourth protrusion on the second direction.

[0033] The projection of the third protrusion on the second direction and the projection of the fourth protrusion on the second direction in the above embodiment partially overlap, and the third protrusion and the fourth protrusion are not completely aligned, which is beneficial to improve the uniformity of stress on the second functional part, and further beneficial to reduce the risk that the second functional part is broken by external force.

[0034] In some embodiments, a projection of the first functional part on the second direction at least partially overlaps a projection of the second functional part on the second direction.

[0035] The projection of the first functional part on the second direction and the projection of the second functional part on the second direction in the above embodiment at least partially overlap, so that the first functional part is at least partially aligned in the second direction, thereby being beneficial to make the first functional part and the second functional part have a more uniform effect on the battery pack when the temperature rises.

[0036] In some embodiments, the battery module further comprises a second thermal insulation layer, and the second thermal insulation layer covers the second functional part.

[0037] The second thermal insulation layer in the above embodiment is beneficial to reduce the risk of the battery pack being affected by the excessively high temperature when the second functional part is fused. The second thermal insulation layer covers the second functional part and the fused part, which is beneficial to reduce the risk of the fused part falling into the battery pack.

[0038] In some embodiments, the battery module further comprises an insulating member, which is arranged between the second conductive member and the battery pack along the first direction.

[0039] In the above embodiment, the insulating member is arranged between the second conductive member and the battery pack, which is beneficial to reduce the risk of the parts with different polarities on the second conductive member and the battery pack being in contact and short-circuiting.

[0040] In some embodiments, the insulating member comprises first and second opposite faces, the second face faces the battery pack, and the third connecting part, the fourth connecting part and the second functional part are located on the first face.

[0041] In the above embodiment, the third connecting part, the second functional part and the fourth connecting part are arranged on the first face, and the second face faces and abuts against the battery pack, which is beneficial to improve the compactness of the structure of the battery module and enable the insulating member to support the third connecting part, the second functional part and the fourth connecting part, thereby reducing the displacement of the stress between the third connecting part, the second functional part and the fourth connecting part when the battery module is impacted, and further reducing the risk of the third connecting part, the second functional part and the fourth connecting part being damaged.

[0042] In some embodiments, the battery module further comprises a circuit board, which is electrically connected with the second connecting part and the third connecting part, and is arranged on the side of the battery pack where the first conductive member and the second conductive member are connected along the first direction. As viewed along the first direction, the circuit board is separated from the first conductive member and is also separated from the second conductive member.

[0043] In the above embodiment, as viewed along the first direction, the first conductive member and the second conductive member are separated from the circuit board, which is beneficial to reduce the risk of the first conductive member and the second conductive member being in contact with other electronic components on the circuit board and short-circuiting.

[0044] In some embodiments, the battery module further comprises a circuit board, which is electrically connected with the first conductive member.

[0045] In the above embodiment, the circuit board is electrically connected with the first conductive member, which is beneficial to timely disconnect the first conductive member from the battery pack when the first conductive member is fused due to excessive current in the circuit, and is beneficial to protect the circuit board.

[0046] In some embodiments, the circuit board is electrically connected with the second connecting part, and is arranged on the side of the battery pack where the first conductive member is connected along the first direction.

[0047] In the above embodiment, the circuit board is electrically connected with the second connecting portion, which is conducive to timely disconnecting the circuit board from the battery pack after the first conductive member is fused, thereby facilitating protection of the circuit board.

[0048] In some embodiments, the circuit board is spaced apart from the first conductive member as viewed in the first direction.

[0049] In the above embodiment, the first conductive member is spaced apart from the circuit board as viewed in the first direction, which is conducive to reducing the risk of short circuiting of the first conductive member with other electronic components on the circuit board.

[0050] In some embodiments, the battery module further includes a first housing, a second housing and a third housing connected together, and the first housing, the second housing and the third housing together define a receiving cavity for receiving the battery pack and the first conductive member.

[0051] In the above embodiment, the receiving cavity receives the battery pack and the first conductive member, which is conducive to sealing the battery pack and the first conductive member and protecting the battery pack and the first conductive member, thereby reducing the risk of safety problems caused by exposure of the battery pack and the first conductive member.

[0052] In addition, the present application also provides a power consumption device that is conducive to improving reliability.

[0053] Some embodiments of the present application provide a power consumption device, which includes the battery module of any of the above embodiments.

[0054] The battery module in the above embodiment is conducive to timely disconnecting the circuit in extreme cases, thereby protecting the battery module, and is conducive to protecting the circuit when the battery module is impacted, thereby improving the reliability of the power consumption device using the battery module.

[0055] The battery module in the present application includes a battery pack and a first conductive member. The first conductive member includes a first connecting portion, a first functional portion and a second connecting portion connected in sequence. The first functional portion includes a first portion and a first protrusion, the first portion connects the first connecting portion and the second connecting portion, the first protrusion extends from the first connecting portion to the second connecting portion in a second direction, and the first protrusion is spaced apart from the first portion and the second connecting portion, which makes the first functional portion more likely to be fused, thereby reducing the risk of the first functional portion not being fused in time when the current is too large. In addition, the first protrusion is conducive to improving the structural strength of the first functional portion itself and reducing the risk of the first functional portion being broken due to external force, so that the first portion is disconnected at the appropriate time, thereby improving the reliability of the battery module. BRIEF DESCRIPTION OF DRAWINGS

[0056] Figure 1 A side view of the battery module provided by an embodiment of the present application.

[0057] Figure 2 Fig. 1 is a schematic view of a battery module according to an embodiment of the present application. Figure 1 Fig. 2 is a cross-sectional view of the battery module of Fig. 1.

[0058] Figure 3 Fig. 3 is an exploded view of the battery module of Fig. 1.

[0059] Figure 4 Fig. 4 is a schematic view of a battery according to an embodiment of the present application.

[0060] Figure 5 Fig. 5 is a schematic view of a battery according to another embodiment of the present application.

[0061] Figure 6 Fig. 6 is a schematic view of a battery module according to an embodiment of the present application.

[0062] Figure 7 Fig. 7 is an exploded view of the battery module of Fig. 6.

[0063] Figure 8 Fig. 8 is a plan view of the battery module of Fig. 6.

[0064] Figure 9 Fig. 9 is a schematic view of a battery module according to another embodiment of the present application. Figure 8 Fig. 10 is an enlarged view of a portion of Fig. 9.

[0065] Figure 10 Fig. 11 is a schematic view of a battery module according to another embodiment of the present application. Figure 8 Fig. 12 is an enlarged view of a portion of Fig. 11.

[0066] Figure 11 Fig. 13 is a schematic view of an electrical device according to an embodiment of the present application.

[0067] Explanation of Main Elements

[0068] Battery module 100

[0069] Battery pack 10

[0070] First battery group 11

[0071] Battery 111

[0072] Cylinder 111a

[0073] Cover 111b

[0074] Packing bag 111c

[0075] Electrode terminal 111d

[0076] Second battery group 12

[0077] First terminal 13

[0078] Second terminal 14

[0079] insulating member 20

[0080] first face 21

[0081] second face 22

[0082] first conductive member 30

[0083] first connecting portion 31

[0084] second connecting portion 32

[0085] first functional portion 33

[0086] first portion 331

[0087] first protruding portion 332

[0088] second portion 333

[0089] second protruding portion 334

[0090] first thermal insulation layer 40

[0091] second conductive member 50

[0092] third connecting portion 51

[0093] fourth connecting portion 52

[0094] second functional portion 53

[0095] third portion 531

[0096] third protruding portion 532

[0097] fourth portion 533

[0098] fourth protruding portion 534

[0099] second thermal insulation layer 60

[0100] circuit board 70

[0101] interface 71

[0102] first housing 101

[0103] first wall 1011

[0104] second wall 1012

[0105] third wall 1013

[0106] fourth wall 1014

[0107] second housing 102

[0108] Third housing 103

[0109] Accommodating cavity 10a

[0110] Device main body 200

[0111] Electric device 1000

[0112] First distance D1

[0113] Second distance D2

[0114] Third distance D3

[0115] Fourth distance D4

[0116] Fifth distance D5

[0117] Sixth distance D6

[0118] Seventh distance D7

[0119] Eighth distance D8

[0120] First direction X

[0121] Second direction Y

[0122] Third direction Z DETAILED DESCRIPTION

[0123] The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments.

[0124] It should be noted that when one component is considered to be "connected" to another component, it can be directly connected to the other component or a middle component can exist at the same time. When one component is considered to be "provided on" another component, it can be directly provided on the other component or a middle component can exist at the same time. The terms "top", "bottom", "upper", "lower", "left", "right", "front", "back", and the like used herein are for illustrative purposes only.

[0125] The term "vertical" is used to describe an ideal state between two components. In actual production or use state, there can be a state similar to vertical between the two components. For example, in conjunction with numerical description, vertical can refer to the included angle between two straight lines in the range of 90°±10°, vertical can also refer to the dihedral angle between two planes in the range of 90°±10°, and vertical can also refer to the included angle between a straight line and a plane in the range of 90°±10°. The two components described as "vertical" can not be absolute straight lines or planes, but can be approximately straight lines or planes, and the overall extension direction of the components can be considered as "straight lines" or "planes" from a macroscopic point of view.

[0126] It should be noted that when a certain parameter is greater than, equal to or less than a certain endpoint value, it is understood that there is a tolerance of ±5% for the endpoint value.

[0127] Unless otherwise specified, the term "a plurality of" as used herein refers to two or more.

[0128] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0129] The application discloses a battery module, which comprises a battery pack, an insulating piece and a first conductive piece. The insulating piece is connected to the battery pack and is arranged on one side of the battery pack in a first direction. The first conductive piece comprises a first connecting part, a second connecting part and a first functional part. The first connecting part, the second connecting part and the first functional part are located on the side of the insulating piece away from the battery pack. The first connecting part is electrically connected to the battery pack. The first connecting part and the second connecting part are arranged in a second direction perpendicular to the first direction. The first functional part is arranged between the first connecting part and the second connecting part. The first functional part comprises a first part and a first protruding part. The first part is connected to the first connecting part and the second connecting part. The first protruding part extends from the first connecting part to the second connecting part in the second direction. The first protruding part is separated from the first part and the second connecting part.

[0130] The first protruding part is separated from the first part and the second connecting part, so that the first functional part is more likely to be fused, thereby reducing the risk that the first functional part is not fused in time when the current is too large. The arrangement of the first protruding part is conducive to improving the structural strength of the first functional part and reducing the risk of fracture of the first functional part caused by external force, so that the first part is disconnected at the appropriate time, thereby improving the reliability of the battery module.

[0131] Some embodiments of the application will be described in detail with reference to the drawings. The following embodiments and features in the embodiments can be combined with each other without conflict.

[0132] Referring to Figures 1 to 3 , the embodiment of the present application provides a battery module 100, which comprises a battery pack 10 and a first conductive member 30 electrically connected with the battery pack 10. The first conductive member 30 comprises a first connecting part 31, a second connecting part 32 and a first functional part 33 connecting the first connecting part 31 and the second connecting part 32, and the first connecting part 31, the second connecting part 32 and the first functional part 33 are located on one side of the battery pack 10 along a first direction, and the first connecting part 31 is electrically connected with the battery pack 10.

[0133] In some embodiments, referring to Figures 1 to 3 , the battery module 100 further comprises a first housing 101, a second housing 102 and a third housing 103 connected with each other, and the first housing 101, the second housing 102 and the third housing 103 form a containing cavity 10a, which accommodates the battery pack 10 and the first conductive member 30.

[0134] In some embodiments, referring to Figure 2 and Figure 3 , the second housing 102 of the battery module 100 is located at one end of the first housing 101 along the first direction X, and the third housing 103 is located at the other end of the first housing 101 along the first direction X, and the first housing 101 can be connected with the second housing 102 and the third housing 103 by means of bolt connection, adhesive connection, clamping connection or welding, which is not specifically limited here. The battery pack 10 and the first conductive member 30 are accommodated in the containing cavity 10a, which is conducive to sealing the battery pack 10 and the first conductive member 30 by the first housing 101, the second housing 102 and the third housing 103, and protecting the battery pack 10 and the first conductive member 30, thereby reducing the risk of safety problems caused by the exposure of the battery pack 10 and the first conductive member 30.

[0135] In some embodiments, referring to Figure 3 , the first housing 101 comprises a first wall 1011, a second wall 1012, a third wall 1013 and a fourth wall 1014 connected with each other, the first wall 1011 and the second wall 1012 are oppositely arranged along a second direction Y, the third wall 1013 and the fourth wall 1014 are oppositely arranged along a third direction Z, and the second direction Y and the third direction Z are perpendicular to each other.

[0136] In some embodiments, referring to Figure 3The battery pack 10 comprises a first battery group 11 and a second battery group 12, the first battery group 11 and the second battery group 12 are arranged along a first direction X, and the first battery group 11 and the second battery group 12 are arranged in series or in parallel. The first battery group 11 and the second battery group 12 each comprise a plurality of batteries 111 arranged in series or in parallel, the plurality of batteries 111 of the first battery group 11 are arranged along a second direction Y or a third direction Z, and the plurality of batteries 111 of the second battery group 12 are arranged along the second direction Y or the third direction Z. The arrangement of the first battery group 11 and the second battery group 12 and the arrangement of the batteries 111 of the first battery group 11 and the second battery group 12 facilitate the combination of the plurality of batteries 111 to form a regular overall shape.

[0137] In some other embodiments, the battery pack 10 comprises a first battery group 11 and a second battery group 12, the first battery group 11 and the second battery group 12 are arranged along a second direction Y, and the first battery group 11 and the second battery group 12 are arranged in series or in parallel. The first battery group 11 and the second battery group 12 each comprise a plurality of batteries 111 arranged in series or in parallel, the plurality of batteries 111 of the first battery group 11 are arranged along the second direction Y or a third direction Z, and the plurality of batteries 111 of the second battery group 12 are arranged along the second direction Y or the third direction Z.

[0138] In some embodiments, referring to Figure 4 The battery 111 is a cylindrical battery. The battery 111 comprises a cylinder 111a, a cover 111b, and an electrode assembly (not shown in the figure), the cylinder 111a and the cover 111b are insulatedly connected and surround a receiving cavity (not shown in the figure) to accommodate the electrode assembly.

[0139] In some other embodiments, referring to Figure 5 The battery 111 is a soft-pack battery, and the battery 111 comprises a packaging bag 111c, an electrode assembly (not shown in the figure), and an electrode terminal 111d. The packaging bag 111c can be a flexible aluminum-plastic film. The electrode assembly is accommodated in the packaging bag 111c, the electrode terminal 111d is connected with the electrode assembly, and at least part of the electrode terminal 111d extends out of the packaging bag 111c to lead out the polarity of the electrode assembly. In other embodiments, the battery is a square battery, and the specific structure is not described here.

[0140] In some embodiments, the electrode assembly comprises a first electrode sheet, a second electrode sheet, and a separator film between the first electrode sheet and the second electrode sheet, and the first electrode sheet, the second electrode sheet, and the separator film are arranged in a stacked and wound manner. The first electrode sheet can be a positive electrode sheet or a negative electrode sheet, the second electrode sheet can be a positive electrode sheet or a negative electrode sheet, the polarity of the first electrode sheet and the second electrode sheet is opposite, and the electrode sheets with different polarities are made of different metal layers.

[0141] As an exemplary enumeration, the first tab is a positive tab, the first tab includes a metal aluminum layer and a positive active material layer coated on the surface of the metal aluminum layer, the positive active material layer includes one or more of nickel cobalt lithium manganate, nickel cobalt lithium manganate, cobalt lithium manganate, iron lithium phosphate, nickel cobalt lithium manganate, lithium manganate, manganese iron lithium phosphate, cobalt-free material. The second tab is a negative tab, the second tab includes a metal copper layer and a negative active material layer coated on the metal copper layer, the negative active material layer includes one or more of artificial graphite, natural graphite, silicon material.

[0142] In some embodiments, the isolation film is a polyethylene film, a polypropylene film, a polyester film, or a polyimide film, etc. capable of insulating film materials, so as to play the role of isolating the positive tab and the negative tab.

[0143] In the embodiment in which the battery 111 is a cylindrical battery, the first tab of the electrode assembly is electrically connected with the cover body 111b, so that the polarity of the cover body 111b is the same as that of the first tab, and the second tab is electrically connected with the barrel body 111a, so that the polarity of the barrel body 111a is the same as that of the second tab.

[0144] In some embodiments, referring to Figure 3 , the battery pack 10 is provided with a first terminal 13 and a second terminal 14, the polarity of the first terminal 13 is opposite to that of the second terminal 14, for example, the polarity of the first terminal 13 is positive, and the polarity of the second terminal 14 is negative; for another example, the polarity of the first terminal 13 is negative, and the polarity of the second terminal 14 is positive. The first terminal 13 and the second terminal 14 are two total terminals that are extended after the batteries in the battery pack 10 are connected in series or in parallel, and are used to electrically connect the battery pack 10 as a whole with other circuits.

[0145] In some embodiments, referring to Figure 3 , the first connecting part 31 is electrically connected with the first terminal 13, the polarity of the first functional part 33 and the second connecting part 32 is the same as that of the first connecting part 31, and the second connecting part 32 is used to electrically connect with other components outside the battery pack 10.

[0146] In some embodiments, referring to Figures 1 to 3 , the battery module 100 further includes a circuit board 70, the circuit board 70 is electrically connected with the first conductive part 30, so that the circuit board 70 is electrically connected with the battery pack 10 through the first conductive part 30, which is conducive to the timely disconnection of the circuit board 70 from the battery pack 10 after the first conductive part 30 is fused when the current in the circuit board 70 is too large, thereby facilitating the protection of the circuit board 70.

[0147] In some embodiments, referring to Figures 1 to 3The circuit board 70 is electrically connected with the second connecting part 32 of the first conductive part 30, which is conducive to the timely disconnection of the circuit board 70 from the battery pack 10 after the first conductive part 30 is fused, thereby protecting the circuit board 70. The circuit board 70 is arranged on the side of the battery pack 10 connected with the first conductive part 30, so that the circuit board 70 and the battery pack 10 are arranged along the first direction X.

[0148] In some embodiments, along the first direction X, the distance between the circuit board 70 and the battery pack 10 can be different from the distance between the first conductive part 30 and the battery pack 10.

[0149] In some embodiments, as viewed along the first direction X, the circuit board 70 is spaced apart from the first conductive part 30. As viewed along the first direction X, the first conductive part 30 is spaced apart from the circuit board 70, which is conducive to reducing the risk of short circuit caused by the contact between the first conductive part 30 and other electronic components on the circuit board 70.

[0150] In some embodiments, the circuit board 70 is a BMS (Battery Management System) board, which can collect parameters such as voltage, temperature, current, and voltage of the battery pack 10 to monitor the operating state of the battery pack 10, thereby improving the reliability of the battery module 100.

[0151] In some embodiments, as viewed along the first direction X, the circuit board 70 is spaced apart from the first conductive part 30. As viewed along the first direction X, the first conductive part 30 is spaced apart from the circuit board 70, which is conducive to reducing the risk of short circuit caused by the contact between the first conductive part 30 and other electronic components on the circuit board 70. Figure 6 In some embodiments, as viewed along the first direction X, the circuit board 70 is spaced apart from the first conductive part 30. As viewed along the first direction X, the first conductive part 30 is spaced apart from the circuit board 70, which is conducive to reducing the risk of short circuit caused by the contact between the first conductive part 30 and other electronic components on the circuit board 70.

[0152] In some embodiments, as viewed along the first direction X, the circuit board 70 is spaced apart from the first conductive part 30. As viewed along the first direction X, the first conductive part 30 is spaced apart from the circuit board 70, which is conducive to reducing the risk of short circuit caused by the contact between the first conductive part 30 and other electronic components on the circuit board 70. Figure 3 In some embodiments, as viewed along the first direction X, the circuit board 70 is spaced apart from the first conductive part 30. As viewed along the first direction X, the first conductive part 30 is spaced apart from the circuit board 70, which is conducive to reducing the risk of short circuit caused by the contact between the first conductive part 30 and other electronic components on the circuit board 70.

[0153] Figure 7 In some embodiments, as viewed along the first direction X, the circuit board 70 is spaced apart from the first conductive part 30. As viewed along the first direction X, the first conductive part 30 is spaced apart from the circuit board 70, which is conducive to reducing the risk of short circuit caused by the contact between the first conductive part 30 and other electronic components on the circuit board 70. Figure 8 ​, the first face 21 faces the first conductive member 30, and the first connecting portion 31, the first functional portion 33, and the second connecting portion 32 are arranged on the first face 21, and the second face 22 faces and abuts against the battery pack 10, which is conducive to improving the structural compactness of the battery module 100, and also enables the insulating member 20 to support the first connecting portion 31, the first functional portion 33, and the second connecting portion 32, thereby reducing the displacement of the stress between the first connecting portion 31, the first functional portion 33, and the second connecting portion 32 when the battery module 100 is impacted, and further reducing the risk of damage to the first connecting portion 31, the first functional portion 33, and the second connecting portion 32.

[0154] In some other embodiments, the first connecting portion 31, the second connecting portion 32, and the first functional portion 33 are spaced apart from the first face 21, for example, the second connecting portion 32 is fixed with the protruding structure of the insulating member 20 arranged on the first face 21, so that the first functional portion 33 of the second connecting portion 32 and the first connecting portion 31 can be spaced apart from the first face 21.

[0155] In some embodiments, the insulating member 20 is made of insulating plastic, rubber, or silicone, and the shape of the insulating member 20 can be a plate, a cover, or other special shapes, which are not limited here.

[0156] In some embodiments, the first conductive member 30 can be made of conductive metal materials such as copper, nickel, or aluminum.

[0157] In some embodiments, along the first direction X, the circuit board 70 is arranged on the side of the insulating member 20 away from the battery pack 10, so that the circuit board 70 is arranged opposite to the first face 21, which is conducive to reducing the risk of direct contact between the circuit board 70 and the battery pack 10, thereby reducing the risk of short circuit.

[0158] In some other embodiments, the insulating member 20 can also be omitted, the circuit board 70 is arranged spaced apart from the battery pack 10, and the circuit board 70 is fixedly connected with the first housing 101, the second housing 102, or the third housing 103, and the first conductive member 30 is fixed on the side of the circuit board 70 away from the battery pack 10.

[0159] Please refer to Figure 3 and Figure 8 , the first connecting portion 31 and the second connecting portion 32 are arranged spaced apart along the second direction Y perpendicular to the first direction X, and please refer to Figure 8 and Figure 9 , the first functional portion 33 is arranged between the first connecting portion 31 and the second connecting portion 32, which is conducive to arranging the first connecting portion 31, the second connecting portion 32, and the first functional portion 33 on the first face 21.

[0160] In some embodiments, the first connecting portion 31 and the second connecting portion 32 are arranged along the third direction Z, which is perpendicular to both the first direction X and the second direction Y. In other embodiments, the first connecting portion 31 and the second connecting portion 32 can also be arranged along a direction which is perpendicular to the first direction X and forms an angle less than 90° with the second direction Y or the third direction Z, which is beneficial for arranging the first connecting portion 31, the second connecting portion 32 and the first functional portion 33 on the first surface 21. In some embodiments, referring to Figure 8 , the circuit board 70 is provided with an interface 71 for electrical connection with an external circuit.

[0161] The first functional portion 33 functions to interrupt the current in abnormal conditions. The first connecting portion 31 is electrically connected with the first terminal 13, and the second connecting portion 32 is connected with the circuit board 70 for electrical connection with an external circuit. When the battery module 100 is working, the interface 71 on the circuit board 70 is electrically connected with a circuit outside the battery pack 10, and the battery pack 10 is charged or discharged, so that the current flows through the circuit board 70, the second connecting portion 32, the first functional portion 33, the first connecting portion 31 and the first terminal 13 connected with the first connecting portion 31. In the extreme case of large current generated by the battery pack 10, the current flowing through the first functional portion 33 is also large, which causes the first functional portion 33 to heat up quickly and fuse, thereby disconnecting the first connecting portion 31 and the second connecting portion 32 to interrupt the current loop, thereby protecting the battery pack 10.

[0162] Referring to Figure 8 and Figure 9 , the first connecting portion 31 and the second connecting portion 32 are arranged along the second direction Y, and the first functional portion 33 includes a first portion 331 and a first protrusion 332. The first portion 331 connects the first connecting portion 31 and the second connecting portion 32, and the first protrusion 332 extends from the first connecting portion 31 to the second connecting portion 32 along the second direction Y. The first protrusion 332 is separated from both the first portion 331 and the second connecting portion 32. In the extreme case of large current generated by the battery pack 10, the first portion 331 is fused, causing the first connecting portion 31 and the second connecting portion 32 to be disconnected. The first protrusion 332 is separated from both the first portion 331 and the second connecting portion 32, which makes the first functional portion 33 more likely to be fused, thereby reducing the risk of the first functional portion 33 not being fused in time when the current is too large, and improving the reliability of the battery module 100. The first protrusion 332 is beneficial for improving the structural strength of the first functional portion 33 itself, and functions to reduce vibration and buffering, thereby reducing the risk of the first functional portion 33 being broken due to external force, and further improving the reliability of the battery module 100.

[0163] In some embodiments, referring to Figure 9The first functional part 33 further comprises a second portion 333 connecting the first connecting part 31 and the second connecting part 32, and the second portion 333 is separated from the first portion 331 and the first protrusion 332. In the extreme case that the battery pack 10 generates a large current, the first portion 331 and the second portion 333 are both fused, and the second portion 333 is beneficial to improve the structural strength of the first functional part 33, improve the uniformity of the force received by the first functional part 33, and reduce the risk of fracture of the first functional part 33 caused by external force.

[0164] In some embodiments, referring to Figure 9 The first functional part 33 further comprises a second protrusion 334 extending from the second connecting part 32 to the first connecting part 31 along the second direction Y, and the second protrusion 334 is separated from the first portion 331, the second portion 333, the first connecting part 31 and the first protrusion 332. The second protrusion 334 is beneficial to further improve the structural strength of the first functional part 33 itself, improve the uniformity of the force received by the first functional part 33, increase the damping and buffering effect, and thus reduce the risk of fracture of the first functional part 33 caused by external force.

[0165] In some embodiments, referring to Figure 9 The first connecting part 31 and the second connecting part 32 are arranged in a spaced manner along the second direction Y, and the first functional part 33 is arranged between the first connecting part 31 and the second connecting part 32. Along the third direction Z, the first protrusion 332 and the second protrusion 334 are located between the first portion 331 and the second portion 333, which is beneficial to increase the distance of the first portion 331 and the second portion 333 along the third direction Z, so that the first portion 331 and the second portion 333 are not concentrated in one place, thereby reducing the risk of disconnection of the first connecting part 31 and the second connecting part 32 caused by impact force. Moreover, the first protrusion 332 and the second protrusion 334 located between the first portion 331 and the second portion 333 enable the parts connecting the first connecting part 31 and the second connecting part 32 to be staggered with the parts not connecting the first connecting part 31 and the second connecting part 32, which improves the uniformity of the force received by the first functional part 33, thereby reducing the risk of fracture of the first functional part 33 caused by external force.

[0166] In some embodiments, referring to Figure 9In the third direction Z, the first protrusion 332 has a first distance D1 to the first portion 331 and a second distance D2 to the second portion 333, the first distance D1 is different from the second distance D2, so that the first protrusion 332 is closer to one of the first portion 331 and the second portion 333 and farther to the other one of the first portion 331 and the second portion 333. The one of the first portion 331 and the second portion 333 farther to the first protrusion 332 is less likely to be fused with the first protrusion 332 when being fused, so that the risk of the first functional portion 33 being fused but the first connecting portion 31 and the second connecting portion 32 not being disconnected is reduced, and the one of the first portion 331 and the second portion 333 closer to the first protrusion 332 is less likely to be broken by external force due to the damping and buffering effect provided by the first protrusion 332.

[0167] As an exemplary enumeration, the first distance D1 is less than the second distance D2.

[0168] In some embodiments, referring to Figure 9 In the third direction Z, the second protrusion 334 has a third distance D3 to the first portion 331 and a fourth distance D4 to the second portion 333, the third distance D3 is different from the fourth distance D4, so that the second protrusion 334 is closer to one of the first portion 331 and the second portion 333 and farther to the other one of the first portion 331 and the second portion 333. The one of the first portion 331 and the second portion 333 farther to the second protrusion 334 is less likely to be fused with the second protrusion 334 when being fused, so that the risk of the first functional portion 33 being fused but the first connecting portion 31 and the second connecting portion 32 not being disconnected is reduced, and the one of the first portion 331 and the second portion 333 closer to the second protrusion 334 is less likely to be broken by external force due to the damping and buffering effect provided by the second protrusion 334.

[0169] As an exemplary enumeration, the third distance D3 is greater than the fourth distance D4.

[0170] In some embodiments, referring to Figure 9 The first distance D1 is different from the third distance D3, the second distance D2 is different from the fourth distance D4, the first distance D1 is less than the second distance D2, and the third distance D3 is greater than the fourth distance D4, which is beneficial to improve the uniformity of the force received by the first functional portion 33 and reduce the risk of damage of the first functional portion 33 due to stress concentration.

[0171] In some embodiments, referring to Figure 3The projection of the first protrusion 332 in the second direction Y partially overlaps with the projection of the second protrusion 334 in the second direction Y, and the first protrusion 332 and the second protrusion 334 are not completely aligned, which is beneficial to improve the uniformity of the force received by the first functional part 33, and further beneficial to reduce the risk of the first functional part 33 being broken due to external force.

[0172] In some embodiments, referring to Figure 7 and Figure 8 The battery module 100 further comprises a first thermal insulation layer 40, and the first thermal insulation layer 40 covers the first functional part 33. The first thermal insulation layer 40 is made of insulating and thermal insulation materials, which is beneficial to reduce the risk of the first functional part 33 causing excessive temperature when being fused to affect the insulating part 20 or the battery pack 10. The first thermal insulation layer 40 covers the first functional part 33, and also covers the part that is fused, which is beneficial to reduce the risk of the fused part falling into the battery pack 10.

[0173] In some embodiments, the insulating and thermal insulation materials of the first thermal insulation layer 40 can be glass fibers, magnesium oxide fibers, calcium oxide fibers, pre-oxidized carbon fibers, and the like, or aerogels filled with thermal insulation particles in the fiber layer, or hollow ceramic or high-temperature resistant plastic shells, and the like, which are not listed one by one here.

[0174] In some embodiments, referring to Figure 8 The battery module 100 further comprises a second conductive part 50, and the second conductive part 50 is electrically connected with the battery pack 10. The second conductive part 50 comprises a third connecting part 51, a fourth connecting part 52, and a second functional part 53 connecting the third connecting part 51 and the fourth connecting part 52. In the first direction, the third connecting part 51, the fourth connecting part 52, and the second functional part 53 are located on one side of the battery pack 10, and the second connecting part 32 is electrically connected with the battery pack 10.

[0175] In some embodiments, the first connecting part 31, the second connecting part 32, and the first functional part 33 of the first conductive part 30 are located on the same side of the battery pack 10 as the third connecting part 51, the fourth connecting part 52, and the second functional part 53 of the second conductive part 50.

[0176] In some embodiments, the first connecting part 31, the second connecting part 32, and the first functional part 33 of the first conductive part 30 are located on the same side of the battery pack 10 as the third connecting part 51, the fourth connecting part 52, and the second functional part 53 of the second conductive part 50.

[0177] In some embodiments, the first conductive member 30 and the second conductive member 50 are located at different sides of the battery pack 10, the first conductive member 30 is arranged along the first direction X with the battery pack 10, and the second conductive member 50 is arranged along the second direction Y with the battery pack 10, which is conducive to fully utilizing the space around the battery pack 10 and improving the energy density of the battery module 100.

[0178] In some embodiments, along the first direction X, the distance between the first conductive member 30 and the battery pack 10 is different from the distance between the second conductive member 50 and the battery pack 10.

[0179] In the embodiments provided with the insulating member 20, the insulating member is located between the second conductive member 50 and the battery pack 10, and the third connecting part 51, the fourth connecting part 52 and the second functional part 53 are arranged on the first surface 21.

[0180] In some embodiments, referring to Figure 7 , the battery pack 10 is provided with a second terminal 14, the first connecting part 31 is electrically connected with the first terminal 13, and the fourth connecting part 52 is electrically connected with the second terminal 14. As an exemplary enumeration, the first connecting part 31 is electrically connected with the first terminal 13, the polarity of the first connecting part 31, the first functional part 33 and the second connecting part 32 is positive, and the second connecting part 32 is electrically connected with the circuit board 70; the fourth connecting part 52 is electrically connected with the second terminal 14, the polarity of the third connecting part 51, the second functional part 53 and the fourth connecting part 52 is negative, the third connecting part 51 is electrically connected with the circuit board 70, and the interface 71 of the circuit board 70 is electrically connected with the circuit outside the battery pack 10.

[0181] In some embodiments, referring to Figure 8 and Figure 7 , the insulating member 20 comprises a first surface 21 and a second surface 22 facing opposite directions, the first surface 21 faces the second conductive member 50, and the third connecting part 51, the second functional part 53 and the fourth connecting part 52 are arranged on the first surface 21, and the second surface 22 faces the battery pack 10 and abuts against the battery pack 10, which is conducive to improving the structural compactness of the battery module 100, and also enables the insulating member 20 to support the third connecting part 51, the second functional part 53 and the fourth connecting part 52, thereby reducing the displacement of the stress between the third connecting part 51, the second functional part 53 and the fourth connecting part 52 when the battery module 100 is impacted, and further reducing the risk of damage to the third connecting part 51, the second functional part 53 and the fourth connecting part 52.

[0182] In some embodiments, referring to Figure 8 and Figure 8The first surface 21 faces the first conductive member 30 and the second conductive member 50, and the first connecting portion 31, the first functional portion 33, the second connecting portion 32, the third connecting portion 51, the second functional portion 53, and the fourth connecting portion 52 are arranged on the first surface 21.

[0183] In some other embodiments, the third connecting portion 51, the fourth connecting portion 52, and the second functional portion 53 are spaced apart from the first surface 21. For example, the fourth connecting portion 52 is fixed with the protruding structure of the insulating member 20 arranged on the first surface 21, so that the first functional portion 33 and the first connecting portion 31 of the fourth connecting portion 52 are spaced apart from the first surface 21.

[0184] In some embodiments, the second conductive member 50 can be made of a conductive metal material such as copper, nickel, or aluminum.

[0185] In some embodiments, referring to Figure 10 The third connecting portion 51 and the fourth connecting portion 52 are arranged along the second direction Y, and referring to Figure 10 The second functional portion 53 is arranged between the third connecting portion 51 and the fourth connecting portion 52, which is beneficial for arranging the third connecting portion 51, the fourth connecting portion 52, and the second functional portion 53 on the first surface 21.

[0186] In other embodiments, the third connecting portion 51 and the fourth connecting portion 52 are arranged along the third direction Z, or the third connecting portion 51 and the fourth connecting portion 52 are arranged along a direction perpendicular to the first direction X and having an angle less than 90° with the second direction Y or the third direction Z, which is beneficial for arranging the third connecting portion 51, the fourth connecting portion 52, and the second functional portion 53 on the first surface 21.

[0187] The second function part 53 interrupts the current in abnormal conditions. The first connecting part 31 is electrically connected with one of the first terminal 13 and the second terminal 14, the fourth connecting part 52 is electrically connected with the other of the first terminal 13 or the second terminal 14, the second connecting part 32 is electrically connected with the circuit board 70, and the third connecting part 51 is electrically connected with the circuit board 70. The circuit board 70 is electrically connected with external circuits. When the battery module 100 is working, the interface 71 of the circuit board 70 is electrically connected with the circuits outside the battery pack 10, the battery pack 10 charges and discharges, and the current flows through the circuit board 70, the second connecting part 32, the first function part 33, the first connecting part 31, the first terminal 13 or the second terminal 14 connected with the first connecting part 31, the battery 111 in the battery pack 10, the first terminal 13 or the second terminal 14 connected with the fourth connecting part 52, the fourth connecting part 52, the second function part 53, the third connecting part 51, and the circuit board 70. In the extreme case of large current generated by the battery pack 10, the current flowing through the first function part 33 and the second function part 53 is also large, which makes the first function part 33 and the second function part 53 heat up quickly and melt, thereby disconnecting the first connecting part 31 and the second connecting part 32, disconnecting the third connecting part 51 and the fourth connecting part 52, and interrupting the current loop, thereby protecting the battery pack 10.

[0188] In some embodiments, referring to Figure 10 The third connecting part 51 and the fourth connecting part 52 are arranged along the second direction Y, the second function part 53 includes a third part 531 and a third protrusion 532, the third part 531 connects the third connecting part 51 and the fourth connecting part 52, the third protrusion 532 extends from the third connecting part 51 to the fourth connecting part 52 along the second direction Y, and the third protrusion 532 is separated from the third part 531 and the fourth connecting part 52. In the extreme case of large current generated by the battery pack 10, the third part 531 is melted, and the third connecting part 51 and the fourth connecting part 52 are disconnected. The third protrusion 532 is separated from the third part 531 and the fourth connecting part 52, which makes the second function part 53 more easily melted, thereby reducing the risk of the second function part 53 not being melted in time when the current is too large, and improving the reliability of the battery module 100. The third protrusion 532 is arranged to improve the structural strength of the second function part 53 itself, and plays a role in reducing vibration and buffering, thereby reducing the risk of the second function part 53 being broken under external force, and improving the reliability of the battery module 100.

[0189] In some embodiments, referring to Figure 10The second functional part 53 further comprises a fourth portion 533, the fourth portion 533 is connected with the third connecting part 51 and the fourth connecting part 52, and the fourth portion 533 is separated from the third portion 531 and the third protrusion 532. In the extreme case that the battery pack 10 generates a large current, the third portion 531 and the fourth portion 533 are both fused, and the fourth portion 533 is arranged to improve the structural strength of the second functional part 53, improve the uniformity of the force borne by the second functional part 53, and reduce the risk of fracture of the second functional part 53 caused by external force.

[0190] In some embodiments, referring to Figure 10 The second functional part 53 comprises a fourth protrusion 534, the fourth protrusion 534 extends from the fourth connecting part 52 to the third connecting part 51 along the second direction Y, and the fourth protrusion 534 is separated from the third portion 531, the fourth portion 533, the third connecting part 51, and the third protrusion 532. The fourth protrusion 534 is arranged to further improve the structural strength of the second functional part 53 itself, improve the uniformity of the force borne by the second functional part 53, increase the damping and buffering effect, and thus reduce the risk of fracture of the first functional part 33 caused by external force.

[0191] In some embodiments, referring to Figure 10 The third connecting part 51 and the fourth connecting part 52 are arranged at intervals along the second direction Y, and the second functional part 53 is arranged between the third connecting part 51 and the fourth connecting part 52. Along the third direction Z, the third protrusion 532 and the fourth protrusion 534 are located between the third portion 531 and the fourth portion 533, which is arranged to increase the distance between the third portion 531 and the fourth portion 533 along the third direction Z, so that the third portion 531 and the fourth portion 533 are not concentrated in one place, thereby reducing the risk of disconnection of the third connecting part 51 and the fourth connecting part 52 caused by impact force. In addition, the third protrusion 532 and the fourth protrusion 534 are located between the third portion 531 and the fourth portion 533, so that the part capable of connecting the third connecting part 51 and the fourth connecting part 52 and the part not connecting the third connecting part 51 and the fourth connecting part 52 are staggered, which improves the uniformity of the force borne by the second functional part 53, thereby reducing the risk of fracture of the second functional part 53 caused by external force.

[0192] In some embodiments, referring to Figure 10The third protrusion 532 has a fifth distance D5 from the third portion 531 and a sixth distance D6 from the fourth portion 533 along the third direction Z, the fifth distance D5 is different from the sixth distance D6, the third protrusion 532 is closer to one of the third portion 531 and the fourth portion 533 and farther from the other one of the third portion 531 and the fourth portion 533. The one of the third portion 531 and the fourth portion 533 farther from the third protrusion 532 is less likely to be fused with the third protrusion 532 when being fused, reducing the risk that the second functional portion 53 is fused but the third connecting portion 51 and the fourth connecting portion 52 are not disconnected. The one of the third portion 531 and the fourth portion 533 closer to the third protrusion 532 is less likely to be broken by external force due to the damping and buffering effect provided by the third protrusion 532.

[0193] As an exemplary enumeration, the fifth distance D5 is greater than the sixth distance D6.

[0194] In some embodiments, referring to Figure 10 The fourth protrusion 534 has a seventh distance D7 from the third portion 531 and an eighth distance D8 from the fourth portion 533, the seventh distance D7 is different from the eighth distance D8, the fourth protrusion 534 is closer to one of the third portion 531 and the fourth portion 533 and farther from the other one of the third portion 531 and the fourth portion 533. The one of the third portion 531 and the fourth portion 533 farther from the fourth protrusion 534 is less likely to be fused with the fourth protrusion 534 when being fused, reducing the risk that the second functional portion 53 is fused but the third connecting portion 51 and the fourth connecting portion 52 are not disconnected. The one of the third portion 531 and the fourth portion 533 closer to the fourth protrusion 534 is less likely to be broken by external force due to the damping and buffering effect provided by the fourth protrusion 534.

[0195] As an exemplary enumeration, the seventh distance D7 is less than the eighth distance D8.

[0196] In some embodiments, referring to Figure 8 The fifth distance D5 is different from the seventh distance D7, the sixth distance D6 is different from the eighth distance D8, the fifth distance D5 is greater than the sixth distance D6, and the seventh distance D7 is less than the eighth distance D8, which is conducive to improving the uniformity of the force borne by the second functional portion 53 and reducing the risk of damage to the second functional portion 53 due to stress concentration.

[0197] In some embodiments, referring to Figure 10The first distance D1 is less than the second distance D2, the third distance D3 is greater than the fourth distance D4, the fifth distance D5 is greater than the sixth distance D6, the seventh distance D7 is less than the eighth distance D8, and the first functional part 33 and the second functional part 53 form an axisymmetric structure, so that the first functional part 33 and the second functional part 53 are beneficial to improve the consistency of the influence on each part of the battery pack 10 when the temperature of the first functional part 33 and the second functional part 53 rises, and are also beneficial to improve the consistency of the stress of the first functional part 33 and the second functional part 53 when the impact is received.

[0198] In some embodiments, referring to Figure 3 The projection of the third protrusion 532 on the second direction Y partially overlaps with the projection of the fourth protrusion 534 on the second direction Y, and the third protrusion 532 and the fourth protrusion 534 are not completely aligned, which is beneficial to improve the uniformity of the stress of the second functional part 53, and further beneficial to reduce the risk of the second functional part 53 being broken due to external force.

[0199] In some embodiments, referring to Figure 7 and Figure 8 The battery module 100 further comprises a second heat insulation layer 60, and the second heat insulation layer 60 covers the second functional part 53. The second heat insulation layer 60 is made of insulating and heat insulation materials, which is beneficial to reduce the risk of the second functional part 53 being affected by the temperature being too high when the second functional part 53 is fused, and affecting the insulating part 20 or the battery pack 10. The second heat insulation layer 60 covers the second functional part 53, and also covers the part that is fused, which is beneficial to reduce the risk of the fused part falling into the battery pack 10.

[0200] In some embodiments, the insulating and heat insulation materials of the second heat insulation layer 60 can be glass fibers, magnesium oxide fibers, calcium oxide fibers, pre-oxidized carbon fibers, and the like, can be aerogels filled with heat insulation particles in the fiber layer, can be hollow ceramic or high-temperature resistant plastic shells, and the like, which are not listed one by one here.

[0201] In some embodiments, referring to Figure 3 The projection of the first functional part 33 on the second direction Y at least partially overlaps with the projection of the second functional part 53 on the second direction Y, so that the first functional part 33 is at least partially aligned in the second direction Y, thereby being beneficial to make the first functional part 33 and the second functional part 53 have a more uniform influence on the battery pack 10 when the temperature rises.

[0202] In some embodiments, referring to Figure 7 and Figure 3 The circuit board 70 is also electrically connected with the second conductive part 50, thereby being beneficial to make the circuit board 70 electrically connected with the battery pack 10 through the first conductive part 30 and the second conductive part 50.

[0203] In some embodiments, referring to Figure 7 and Figure 11 The circuit board 70 is electrically connected with the third connecting part 51. In some embodiments, the circuit board 70 is electrically connected with the second connecting part 32 and the third connecting part 51, which is conducive to timely disconnecting the circuit board 70 from the battery pack 10 after the first conductive part 30 and / or the second conductive part 50 is fused, thereby facilitating the protection of the circuit board 70.

[0204] In the embodiments provided with the circuit board 70, the circuit board 70 is electrically connected with the second connecting part 32 and the third connecting part 51. In the first direction X, the circuit board 70 is arranged on the side of the battery pack 10 to which the first conductive part 30 and the second conductive part 50 are connected. In the first direction X, the circuit board 70 is away from the first conductive part 30, and the circuit board 70 is also away from the second conductive part 50, which is conducive to reducing the risk of short circuit caused by the contact between the first conductive part 30 and the second conductive part 50 and other electronic components on the circuit board 70.

[0205] Referring to ​ The embodiments of the present application also provide a use electric device 1000, which comprises a device body 200 and the electrochemical device in any of the above embodiments, and the electrochemical device is installed on the device body 200.

[0206] The use electric device 1000 adopts the technical solutions of any of the above electrochemical devices, and thus at least has the beneficial effects brought by the technical solutions of any of the above electrochemical devices, which will not be repeated here.

[0207] Among them, the use electric device 1000 can be a drone, an electric scooter, a cleaning robot, an energy storage device, an electric tool, etc.

[0208] In addition, those skilled in the art should understand that the above embodiments are only used to illustrate the present application, but not as a limitation to the present application, and any appropriate changes and modifications to the above embodiments within the spirit and scope of the present application are within the scope of the present application.

Claims

1. A battery module, characterized in that, include: Battery pack; The first conductive element includes a first connecting portion, a second connecting portion, and a first functional portion. Along a first direction, the first connecting portion, the second connecting portion, and the first functional portion are located on one side of the battery pack. The first connecting portion is electrically connected to the battery pack. The first connecting portion and the second connecting portion are arranged at intervals along a second direction perpendicular to the first direction. The first functional portion is disposed between the first connecting portion and the second connecting portion. The first functional part includes a first portion and a first protrusion. The first portion connects the first connecting portion and the second connecting portion. The first protrusion extends from the first connecting portion toward the second connecting portion along the second direction. The first protrusion is separate from both the first portion and the second connecting portion. The first functional part further includes a second part, which connects the first connecting part and the second connecting part, and the second part is separate from both the first part and the first protrusion; Along a third direction, the first protrusion is located between the first portion and the second portion, and the third direction is perpendicular to both the first direction and the second direction; Along the third direction, there is a first distance between the first protrusion and the first portion, and a second distance between the first protrusion and the second portion, wherein the first distance and the second distance are different.

2. The battery module according to claim 1, characterized in that, The first functional part further includes a second protrusion, which extends from the second connecting part toward the first connecting part along the second direction, and the second protrusion is separate from the first part, the second part, the first connecting part, and the first protrusion.

3. The battery module according to claim 2, characterized in that, Along the third direction, the second protrusion is located between the first portion and the second portion.

4. The battery module according to claim 3, characterized in that, Along the third direction, there is a third distance between the second protrusion and the first portion, and a fourth distance between the second protrusion and the second portion, wherein the third distance and the fourth distance are different.

5. The battery module according to claim 4, characterized in that, The first distance is different from the third distance, and the second distance is different from the fourth distance.

6. The battery module according to any one of claims 3 to 5, characterized in that, The projection of the first protrusion in the second direction partially overlaps with the projection of the second protrusion in the second direction.

7. The battery module according to claim 1, characterized in that, The battery module further includes a first heat insulation layer, which covers the first functional part.

8. The battery module according to claim 1, characterized in that, The battery module also includes an insulating component, which is disposed between the first conductive component and the battery pack along the first direction.

9. The battery module according to claim 8, characterized in that, The insulating component includes a first surface and a second surface facing opposite directions, with the second surface facing the battery pack, and the first connecting portion, the second connecting portion, and the first functional portion located on the first surface.

10. The battery module according to claim 1, characterized in that, The battery module further includes a second conductive component, which includes a third connecting portion, a fourth connecting portion, and a second functional portion. Along the first direction, the third connecting portion, the fourth connecting portion, and the second functional portion are located on one side of the battery pack. The fourth connecting portion is electrically connected to the battery pack. The third connecting portion and the fourth connecting portion are arranged at intervals along the second direction. The second functional portion is located between the first connecting portion and the second connecting portion. The second functional unit includes: The third part connects the third connecting part and the fourth connecting part; The fourth part connects the third connecting part and the fourth connecting part, and the third part is separate from the fourth part; The third protrusion extends from the third connecting portion toward the fourth connecting portion along the second direction, and the third protrusion is separate from the third portion, the fourth portion and the fourth connecting portion; The fourth protrusion extends from the fourth connecting portion toward the third connecting portion along the second direction, and the fourth protrusion is separate from the third portion, the fourth portion, the third protrusion, and the third connecting portion; Along the third direction, the third protrusion and the fourth protrusion are located between the third part and the fourth part, and the third direction is perpendicular to both the first direction and the second direction.

11. The battery module according to claim 10, characterized in that, Along the third direction, there is a fifth distance between the third protrusion and the third portion, and a sixth distance between the third protrusion and the fourth portion, wherein the fifth distance and the sixth distance are different.

12. The battery module according to claim 10, characterized in that, Along the third direction, there is a seventh distance between the fourth protrusion and the third portion, and an eighth distance between the fourth protrusion and the fourth portion, wherein the seventh distance and the eighth distance are different.

13. The battery module according to any one of claims 10 to 12, characterized in that, The projection of the third protrusion in the second direction partially overlaps with the projection of the fourth protrusion in the second direction.

14. The battery module according to claim 10, characterized in that, The projection of the first functional part along the second direction at least partially overlaps with the projection of the second functional part along the second direction.

15. The battery module according to claim 10, characterized in that, The battery module further includes a second heat insulation layer, which covers the second functional part.

16. The battery module according to claim 10, characterized in that, The battery module also includes an insulating component, which is disposed between the second conductive component and the battery pack along the first direction.

17. The battery module according to claim 16, characterized in that, The insulating component includes a first surface and a second surface facing opposite directions, with the second surface facing the battery pack, and the third connecting portion, the fourth connecting portion, and the second functional portion located on the first surface.

18. The battery module according to claim 10, characterized in that, The battery module also includes a circuit board, which is electrically connected to both the second connecting part and the third connecting part. Along the first direction, the circuit board is disposed on the side of the battery module where the first conductive element and the second conductive element are connected. Viewed along the first direction, the circuit board is separate from the first conductive element, and the circuit board is also separate from the second conductive element.

19. The battery module according to claim 1, characterized in that, The battery module also includes a circuit board, which is electrically connected to the first conductive element.

20. The battery module according to claim 19, characterized in that, The circuit board is electrically connected to the second connection portion, and along the first direction, the circuit board is disposed on the side of the battery pack connected to the first conductive element.

21. The battery module according to claim 19, characterized in that, Viewed along the first direction, the circuit board is separate from the first conductive element.

22. The battery module according to claim 1, characterized in that, The battery module further includes a first housing, a second housing, and a third housing connected together. The first housing, the second housing, and the third housing form a receiving cavity, which houses the battery pack and the first conductive element.

23. An electrical appliance, characterized in that, Includes the battery module as described in any one of claims 1 to 22.

Images