Battery pack and electric equipment

Abstract

The invention discloses a battery pack and electric equipment. The battery pack comprises a first shell, a second shell, a battery cell assembly, a heating piece and a heat conduction piece, the second shell is arranged in the first shell. And the battery core assembly is arranged in the second shell. And the heating piece is arranged between the first shell and the second shell and is electrically connected with the battery cell assembly. The heat conduction piece is at least partially arranged between the second shell and the heating piece. And the heat of the heating piece is conducted to the battery cell assembly in the second shell through the heat conduction piece, so that the battery cell assembly is uniformly heated, and the influence of low temperature on the performance of the battery pack is reduced.

Description

Technical Field

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

[0002] At present, battery packs are widely used in electric vehicles, electric two-wheeled vehicles, intelligent energy storage equipment and other fields. The chemical reaction inside the battery pack is greatly affected by temperature, which greatly shortens the battery life at low temperatures and affects the performance of the battery pack. Summary of the invention

[0003] In view of this, it is necessary to provide a battery pack and electrical equipment to heat the battery pack and alleviate the impact of low temperature on the performance of the battery pack.

[0004] An embodiment of the present application provides a battery pack, including a first shell, a second shell, a battery cell assembly, a heating element and a heat conductive element. The second shell is disposed in the first shell. The battery cell assembly is disposed in the second shell. The heating element is disposed between the first shell and the second shell, and the heating element is electrically connected to the battery cell assembly. At least part of the heat conductive element is disposed between the second shell and the heating element. The heat of the heating element is transferred to the battery cell assembly in the second shell through the heat conductive element, so that the battery cell assembly is evenly heated, thereby reducing the influence of low temperature on the performance of the battery pack.

[0005] In one or more optional embodiments above, a circuit board is further included, which is arranged in the second housing, and the circuit board is connected to the battery core assembly. The heating element is connected to a first wire, and the second housing includes a wire channel and a first opening, and the first wire passes through the wire channel and the first opening and is connected to the circuit board.

[0006] In one or more optional embodiments above, the second shell includes a first inner shell and a second inner shell arranged along a first direction, the first inner shell is connected to the second inner shell to form a receiving space, and the battery cell assembly and the circuit board are arranged in the receiving space. The first opening passes through the second shell along the second direction, the wire channel is arranged in the first inner shell and / or the second inner shell, and the first direction is perpendicular to the second direction.

[0007] In one or more optional embodiments above, the second housing includes a first wall, along a first direction, the first wall includes a first surface and a second surface, the heating element, the heat conducting element and the first wall are arranged along the first direction. The second surface is provided with a plurality of first recesses, the battery core assembly includes a plurality of battery cores, the battery cores are provided in the first recesses, and the heat conducting element is connected to the first surface.

[0008] In one or more of the above optional embodiments, the first surface is provided with a first convex portion corresponding to the first concave portion, and the heat conductive member connects the first convex portion and the heating member, so that the thickness of the first wall is basically evenly set, which is beneficial to improving the heating effect of the heating member on the battery cell assembly.

[0009] In one or more optional embodiments above, the heating element includes a main body connected to the first surface, and along the first direction, the projection of the main body is located within the projection of the heat conductive element, which is beneficial to improving the heating effect of the heating element on the battery cell assembly.

[0010] In one or more optional embodiments above, the heating element further comprises an extension portion and a connection portion, the extension portion is connected to the main body portion, the second shell is provided with a limiting recess, and at least part of the extension portion is provided in the limiting recess. The connection portion is connected to the main body portion, and the first wire is connected to the connection portion, so as to limit the position of the heating element and facilitate the installation of the heating element.

[0011] In one or more of the above optional embodiments, the first surface is provided with a receiving recess, and the heat conducting member and the main body are arranged in the receiving recess. In the direction opposite to the first direction, the heat conducting member and the main body do not extend beyond the receiving recess. This facilitates the installation of the second housing, the heat conducting member and the heating member in the first housing, and reduces the occurrence of deformation and failure of the heating member due to the heat conducting member and the heating member being rubbed by the first housing.

[0012] In one or more of the above optional embodiments, a separator is further included, at least part of which is disposed between the heating element and the first shell and at least covers the main body, so as to reduce the possibility of the main body being rubbed by the first shell during installation, thereby preventing the main body from being deformed or the internal heating element from being broken, and protecting the connection point between the first wire and the connection part.

[0013] In one or more of the above optional embodiments, an adhesive member is further included, and the adhesive member bonds the first surface and the heat conductive member, which is beneficial to improving the heating effect of the heating member on the battery core assembly.

[0014] In one or more of the above optional embodiments, the thermal conductivity of the adhesive is 0.2 W / (m·K)-0.4 W / (m·K).

[0015] In one or more optional embodiments above, a connector is further included, the connector is provided on the first housing, the connector and the battery cell assembly are arranged along the third direction, and the first direction, the second direction and the third direction are perpendicular to each other. The connector is provided with a second opening, the circuit board includes a first connection position exposed in the first opening, and along the second direction, the first connection position overlaps with the second opening. It also includes a terminal and a wiring harness, the wiring harness is connected to the first connection position, and extends from the second opening to connect to the terminal, so as to reduce the bending of the wiring harness.

[0016] In one or more optional embodiments above, the heat conducting member includes a metal member or a heat conducting adhesive. The heat conducting adhesive fills the gap between adjacent first protrusions, and the heat conducting adhesive connects the first surface and the heating member, increases the contact area with the first wall, and improves the heating effect of the heating member on the battery cell assembly. The metal member connects the first surface and the heating member, which is conducive to the flat setting of the heating member.

[0017] The present application provides an electrical device, comprising a battery pack according to any one of the above embodiments.

[0018] The battery pack and electrical equipment of the present application transfer the heat of the heating element to the battery cell assembly in the second shell through the heat conductive element, thereby uniformly heating the battery cell assembly and reducing the impact of low temperature on the performance of the battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic diagram of the structure of a battery pack in some embodiments is shown.

[0020] Figure 2 A schematic diagram of a battery pack explosion in some embodiments is shown.

[0021] Figure 3 A cross-sectional view of a portion of a battery pack in some embodiments is shown.

[0022] Figure 4 A cross-sectional view of a portion of a battery pack in some embodiments is shown.

[0023] Figure 5 A schematic diagram of the structure of a portion of a battery pack in some embodiments is shown.

[0024] Figure 6 A schematic structural diagram of the first inner shell in some embodiments is shown.

[0025] Figure 7 A schematic structural diagram of the first inner shell from another viewing angle in some embodiments is shown.

[0026] Figure 8 Shows Figure 1 Section along II-II.

[0027] Fig. 9 A schematic diagram of the structure of a portion of a battery pack in some embodiments is shown.

[0028] Fig.10 A schematic diagram of the structure of a portion of a battery pack along a first direction viewing angle in some embodiments is shown.

[0029] Fig.11 Schematic diagrams of the structures of connecting members in some embodiments are shown.

[0030] Fig.12 A cross-sectional view of a portion of a battery pack in some embodiments is shown.

[0031] Fig.13 A schematic diagram of the structure of a portion of a battery pack in some embodiments is shown.

[0032] Fig.14 A schematic diagram of the structure of electrical equipment in some embodiments is shown.

[0033] Description of main component symbols: Battery Pack 100 First housing 10 Fixing part 11 Second housing 20 First housing side wall 20a Second housing side wall 20b Housing top wall 20c Wire channel 201 First opening 202 Containment Chamber 203 First storage space 203a Second storage space 203b Limiting recess 204 Second convex portion 205 Third convex portion 206 Shell extension wall 207 Fourth Containment Chamber 208 First inner shell 21 First top wall 211 Accommodation recess 2111 The first limiting portion 212 First wire passing port 212a The second limiting portion 213 Second wire passing port 213a First Wall 214 First surface 214a Second surface 214b first recess 2141 First convex portion 2142 Containment recess 2143 The third wall 215 Limiting convex part 2151 First bottom wall 216 Second inner shell 22 Second Wall 221 Second recess 221a The Fourth Wall 222 Second top wall 223 Battery cell assembly 30 Battery Cell 31 Battery shell 311 Electrode assembly 312 Electrode terminal 313 Heating element 40 First wire 41 Main body 42 Extension 43 Connecting part 44 Heat conducting element 50 Circuit board 60 First connection bit 61 Separator 80 Partition body 81 The first extension section 82 The second extension section 83 Through hole 831 Connector 90 Second bottom wall 91 Containment Chamber 3 901 Side wall 92 Extension wall 93 Second opening 94 Terminal 110 Wiring harness 120 Top cover 130 Fasteners 101 Gap 103 Electrical equipment 200 First direction X Second direction Y The third direction Z The following specific embodiments will further illustrate the present application in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0034] 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.

[0035] When a component is considered to be “provided on” another component, it can be directly provided on the other component or there may be a component in between. When a component is considered to be “connected to” another component, it can be directly connected to the other component or there may be a component in between.

[0036] 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. The term "or / and" used herein includes any and all combinations of one or more related listed items.

[0037] It can be understood that the term "perpendicular" is used to describe an ideal state between two components. In actual production or use, there may be a state that is approximately perpendicular or equal to each other between the two components. For example, in combination with numerical descriptions, perpendicularity can refer to the angle between two straight lines being between 90°±10°, perpendicularity can also refer to the dihedral angle between two planes being between 90°±10°, and perpendicularity can also refer to the angle between a straight line and a plane being between 90°±10°. The two components described as "perpendicular" may not be absolute straight lines or planes, but may be roughly straight lines or planes. From a macroscopic perspective, a component can be considered a "straight line" or a "plane" if the overall extension direction is a straight line or a plane.

[0038] Unless otherwise defined, when the term "plurality" is used to describe the number of components, it specifically means that the components are two or more.

[0039] Some embodiments of the present application are described in detail below in conjunction with the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0040] See also Figure 1 to Figure 2 An embodiment of the present application provides a battery pack 100 including a first shell 10 , a second shell 20 and a battery cell assembly 30 . The second shell 20 is disposed in the first shell 10 , and the battery cell assembly 30 is disposed in the second shell 20 .

[0041] In some embodiments, the battery pack 100 includes a heating element 40 , which is disposed between the first shell 10 and the second shell 20 , and the heating element 40 is electrically connected to the battery cell assembly 30 .

[0042] In some embodiments, the battery pack 100 includes a heat conductive member 50 , and at least a portion of the heat conductive member 50 is disposed between the second housing 20 and the heating member 40 .

[0043] The heat of the heating element 40 is conducted to the battery cell assembly 30 in the second shell 20 through the heat conductive element 50 , so that the battery cell assembly 30 is heated evenly, thereby reducing the influence of low temperature on the performance of the battery pack 100 .

[0044] In some embodiments, the heating element 40 includes a heating film, and the heating film includes an insulating film and a resistance wire located in the insulating film. The heating element 40 is electrically connected to the battery cell assembly 30, and the battery cell assembly 30 supplies power to the heating element 40, and the resistance wire generates heat to uniformly heat the battery cell assembly 30.

[0045] See also Figures 3 to 5 In some embodiments, the heating element 40 is provided with a first wire 41 , the second shell 20 includes a wire channel 201 and a first opening 202 , the first wire 41 passes through the wire channel 201 and the first opening 202 , and is connected to the battery cell assembly 30 .

[0046] In some embodiments, the battery pack 100 includes a circuit board 60 , which is disposed in the second housing 20 . The circuit board 60 is connected to the battery cell assembly 30 , and the first wire 41 is connected to the circuit board 60 .

[0047] Optionally, the circuit board 60 includes a BMS assembly (Battery Management System), which includes multiple electronic components, and the multiple electronic components can realize functions such as control, protection, communication, power calculation, signal transmission, and power transmission of the battery cell assembly 30.

[0048] Optionally, the circuit board 60 includes a flexible printed circuit (FPC). Optionally, the circuit board 60 includes a printed circuit board (PCB).

[0049] See also Figure 2 , Figure 5 and Figure 6 In some embodiments, the second shell 20 includes a first inner shell 21 and a second inner shell 22 arranged along a first direction X, the first inner shell 21 is connected to the second inner shell 22 and forms a receiving space 203, and the battery cell assembly 30 and the circuit board 60 are arranged in the receiving space 203.

[0050] Optionally, the heating element 40 is connected to the first inner shell 21 via a heat conducting element 50 .

[0051] Optionally, the heating element 40 is connected to the second inner shell 22 via a heat conducting element 50 .

[0052] Optionally, the first inner shell 21 and the second inner shell 22 are both connected to a heating element 40, so as to further enhance the heating effect of the battery cell assembly 30. The present application takes the example that the heating element 40 is connected to the first inner shell 21 for explanation.

[0053] In some embodiments, the first inner shell 21 has a first receiving space 203 a , the second inner shell 22 has a second receiving space 203 b , and the first receiving space 203 a and the second receiving space 203 b constitute the receiving space 203 .

[0054] In some embodiments, the first inner shell 21 or the second inner shell 22 has a receiving space 203 .

[0055] In some embodiments, the first opening 202 penetrates the second housing 20 along the second direction Y, and the first direction X is perpendicular to the second direction Y.

[0056] Optionally, the first opening 202 passes through the first inner shell 21 along the second direction Y.

[0057] Optionally, the first opening 202 passes through the second inner shell 22 along the second direction Y.

[0058] Optionally, the first opening 202 passes through the first inner shell 21 and the second inner shell 22 along the second direction Y.

[0059] In some embodiments, the first opening 202 is connected to the receiving space 203 , and the first wire 41 extends into the receiving space 203 through the first opening 202 and is connected to the circuit board 60 .

[0060] In some embodiments, the wire channel 201 is disposed in at least one of the first inner shell 21 and the second inner shell 22 .

[0061] Optionally, when the heating element 40 is connected to the first inner shell 21 , the wire channel 201 is disposed in the first inner shell 21 , which is beneficial to shortening the length of the first wire 41 .

[0062] Optionally, when the heating element 40 is connected to the second inner shell 22 , the wire channel 201 is disposed in the second inner shell 22 , which is beneficial for shortening the length of the first wire 41 .

[0063] Optionally, the wire channel 201 is provided on the first inner shell 21 and the second inner shell 22, and the first wire 41 can extend from the wire channel 201 on the first inner shell 21 to the wire channel 201 on the second inner shell 22, or the first wire 41 can extend from the wire channel 201 on the second inner shell 22 to the wire channel 201 on the first inner shell 21. The position of the first wire 41 can be flexibly adjusted to reduce interference between the first wire 41 and other wiring harnesses, thereby facilitating the first wire 41 to connect to the circuit board 60.

[0064] See also Figure 6 and Figure 7 In some embodiments, the wire channel 201 is provided in the first inner shell 21 as an example for explanation, and the first inner shell 21 includes a first top wall 211 and a first limiting portion 212 and a second limiting portion 213 connected to the first top wall 211. The first top wall 211 and the battery cell assembly 30 are arranged along the third direction Z. The first limiting portion 212 and the second limiting portion 213 are arranged at intervals along the first direction X to form the wire channel 201, and the wire channel 201 extends along the second direction Y. The first direction X, the second direction Y and the third direction Z are perpendicular to each other.

[0065] In some embodiments, the first limiting portion 212 is provided with at least one first wire passing opening 212 a , and the first wire 41 extends from the first wire passing opening 212 a into the wire channel 201 .

[0066] In some embodiments, the second limiting portion 213 is provided with at least two second wire passing openings 213a, and the first wire 41 can extend from the first wire passing opening 212a into the wire channel 201, extend from the second wire passing opening 213a to the outside of the wire channel 201, and then extend from another second wire passing opening 213a to the wire channel 201, so as to facilitate limiting the position of the first wire 41.

[0067] See also Figures 6 to 9 In some embodiments, the first inner shell 21 includes a first wall 214 , the heating element 40 , the heat conducting element 50 and the first wall 214 are arranged along the first direction X, and the heating element 40 is connected to the first wall 214 .

[0068] In some embodiments, along the first direction X, the first wall 214 includes a first surface 214a and a second surface 214b, the thermal conductor 50 is connected to the first surface 214a through the thermal conductor 50, the second surface 214b is provided with a plurality of first recesses 2141, and the battery cell assembly 30 includes a plurality of battery cells 31, and the battery cells 31 are provided in the first recesses 2141.

[0069] Optionally, the number of the first recesses 2141 is the same as the number of the battery cells 31 , and one battery cell 31 is disposed in one first recess 2141 .

[0070] Optionally, two battery cells 31 are disposed in one first recess 2141 .

[0071] It is understandable that the number of the battery cells 31 disposed in one first recess 2141 can be adjusted according to demand and is not limited to the above definition.

[0072] See also Figure 3 In some embodiments, the plurality of battery cells 31 are arranged along the third direction Z. The battery cells 31 and the circuit board 60 are arranged along the second direction Y.

[0073] In some embodiments, the battery cell 31 includes a battery cell housing 311, an electrode assembly 312 and an electrode terminal 313, wherein the electrode assembly 312 is disposed in the battery cell housing 311, and the electrode terminal 313 is connected to the electrode assembly 312 and extends out of the battery cell housing 311. The electrode terminal 313 is connected to the circuit board 60. Optionally, the battery cell 31 includes a soft-pack battery cell.

[0074] See also Figures 6 to 8 In some embodiments, the first surface 214a is provided with a first convex portion 2142 corresponding to the first concave portion 2141 , so that the thickness of the first wall 214 is substantially uniformly set, which is beneficial to improving the heating effect of the heating element 40 on the battery cell assembly 30 .

[0075] In some embodiments, the thickness of the first wall 214 is 1 mm-2 mm, which is further beneficial to enhance the heating effect of the heating element 40 on the battery cell assembly 30 .

[0076] Optionally, the thickness of the first wall 214 may be any one of 1 mm, 1.1 mm, 1.2 mm, 1.3 mm, 1.4 mm, 1.5 mm, 1.6 mm, 1.7 mm, 1.8 mm, 1.9 mm, 2 mm, or a range consisting of any two of the following:

[0077] In some embodiments, the heat conductive member 50 connects the first protrusion 2142 and the heating member 40 . The heat conductive member 50 increases the contact area with the first wall 214 , thereby improving the heating effect of the heating member 40 on the battery cell assembly 30 .

[0078] In some embodiments, the heat conductive member 50 is a thermally conductive adhesive, which fills the gaps between adjacent first protrusions 2412 , and the thermally conductive adhesive connects the first surface 214 a and the heating element 40 .

[0079] In some embodiments, the heat conducting member 50 is a metal member, which connects the first surface 214a and the heating member 40, and is conducive to the flat arrangement of the heating member 40. Optionally, the metal member includes an aluminum sheet.

[0080] In some embodiments, when the thermal conductive member 50 is a metal member, the battery pack 100 includes an adhesive member (not shown), which bonds the first surface 214 a and the thermal conductive member 50 , thereby improving the heating effect of the heating member 40 on the battery cell assembly 30 .

[0081] In some embodiments, the thermal conductivity of the adhesive is 0.2 W / (m·K)-0.4 W / (m·K).

[0082] Optionally, the thermal conductivity of the adhesive (in W / (m·K)) may be any one of 0.2, 0.21, 0.22, 0.23, 0.24, 0.25, 0.26, 0.27, 0.28, 0.29, 0.3, 0.31, 0.32, 0.33, 0.34, 0.35, 0.36, 0.37, 0.38, 0.39, 0.4 or a range consisting of any two of them.

[0083] See also Figure 2 In some embodiments, the second inner shell 22 includes a second wall 221 , and along the second direction Y, a second recess 221 a is provided on a side of the second wall 221 facing the battery cell 31 , and the battery cell 31 is provided in the second recess 221 a .

[0084] Optionally, the number of the second recesses 221 a is the same as the number of the battery cells 31 , and one battery cell 31 is disposed in one second recess 221 a .

[0085] Optionally, two battery cells 31 are disposed in one second recess 221 a.

[0086] It is understandable that the number of the battery cells 31 disposed in one second recess 221 a can be adjusted according to demand and is not limited to the above definition.

[0087] In some embodiments, the structure of the second wall 221 is the same as the structure of the first wall 214 .

[0088] In some embodiments, the heating element 40 includes a main body 42 connected to the first surface 214a. Along the first direction X, the projection of the main body 42 is located within the projection of the thermal conductive element 50 , which is beneficial to improving the heating effect of the heating element 40 on the battery cell assembly 30 .

[0089] In some embodiments, a heating element, such as a resistance wire, is disposed in the main body 42 .

[0090] See also Figure 7 and Fig. 9 In some embodiments, the heating element 40 includes an extension portion 43, which is connected to the main body portion 42. The second shell 20 is provided with a limiting recess 204, and at least a portion of the extension portion 43 is provided in the limiting recess 204 to limit the heating element 40 and facilitate the installation of the heating element 40.

[0091] In some embodiments, the limiting recess 204 is located on a surface of the first limiting portion 212 facing away from the second limiting portion 213 .

[0092] In some embodiments, along the first direction X, the extension portion 43 does not exceed the limiting recess 204 , so as to limit the position of the heating element 40 .

[0093] In some embodiments, the heating element 40 includes a connecting portion 44 , the connecting portion 44 is connected to the main body 42 , and the first wire 41 is connected to the connecting portion 44 .

[0094] In some embodiments, along a direction opposite to the third direction Z, at least a portion of the connecting portion 44 extends out of the receiving recess 2143 .

[0095] In some embodiments, the first wire 41 is installed on the side of the connecting portion 44 facing the first limiting portion 212. When the second shell 20, the heat conductor 50 and the heating element 40 are installed in the first shell 10, it is beneficial to protect the connection point between the first wire 41 and the connecting portion 44, and reduce the connection point from being rubbed by the first shell 10, which may cause the first wire 41 and the connecting portion 44 to break.

[0096] In some embodiments, along the first direction X, the projection of the connecting portion 44 is separated from the projection of the first limiting portion 212, and when the connecting portion 44 is subjected to force, at least a portion of the connecting portion 44 can be bent into the wire channel 201. For example, when the second shell 20, the heat conductive member 50 and the heating member 40 are installed in the first shell 10, at least a portion of the connecting portion 44 can be bent into the wire channel 201, thereby reducing the possibility that the connecting portion 44 is rubbed by the first shell 10, causing the connecting portion 44 to be deformed or broken, and protecting the connection point between the first wire 41 and the connecting portion 44.

[0097] In some embodiments, the first top wall 211 is provided with a accommodating recess 2111, and a portion of the connecting portion 44 is provided in the accommodating recess 2111, so that the connecting portion 44 does not exceed the first top wall 211 in the first direction X. When the second shell 20, the heat conductor 50 and the heating element 40 are installed in the first shell 10, the connecting portion 44 is reduced from being rubbed by the first shell 10, which may cause deformation or breakage of the connecting portion 44, and the connection point between the first wire 41 and the connecting portion 44 is protected.

[0098] See also Figure 6 , Figure 7 and Fig. 9 In some embodiments, the first surface 214a is provided with a receiving recess 2143, and the main body 42 of the heat conductive member 50 and the heating member 40 is disposed in the receiving recess 2143. Along the direction opposite to the first direction X, the main body 42 of the heat conductive member 50 and the heating member 40 does not exceed the receiving recess 2413, so that the second housing 20, the heat conductive member 50 and the heating member 40 are easily installed in the first housing 10, and the heat conductive member 50 and the heating member 40 are prevented from being rubbed by the first housing 10, which may cause the heating member 40 to deform and fail.

[0099] In some embodiments, along a direction opposite to the third direction Z, at least a portion of the extension portion 43 extends out of the receiving recess 2143 .

[0100] See also Figure 2 , Figure 6 and Fig.10 In some embodiments, the battery pack 100 includes a partition 80. Along the first direction X, at least a portion of the partition 80 is disposed between the heating element 40 and the first shell 10 and at least covers the main body 42. During installation, the main body 42 is prevented from being rubbed by the first shell 10, which may cause deformation of the main body 42 and breakage of the internal heating element, and the connection point between the first wire 41 and the connecting portion 44 is protected.

[0101] In some embodiments, the partition member 80 includes a partition body portion 81 . Along the first direction X, the partition body portion 81 is disposed between the heating member 40 and the first housing 10 and covers the body portion 42 .

[0102] In some embodiments, the partition 80 includes a first extension section 82 connected to the partition body 81, and the first extension section 82 and the partition body 81 are arranged along the third direction Z. Along the first direction X, the first extension section 82 covers the connection portion 44, and during installation, the connection portion 44 is prevented from being rubbed by the first housing 10, which may cause the connection portion 44 to deform or break, and the connection point between the first wire 41 and the connection portion 44 is protected.

[0103] In some embodiments, the separator 80 includes two second extension sections 83, and the two second extension sections 83 are arranged along the second direction Y. The two second extension sections 83 are connected to the partition body 81. The two second extension sections 83 are connected to the outer surface of the first inner shell 21, so that the separator 80 covers the receiving recess 2143. During installation, the movement of the separator 80 can be reduced, and the main body 42 can be further reduced from being rubbed by the first shell 10, resulting in deformation of the main body 42 and breakage of the internal heating element, and the connection point between the first wire 41 and the connecting part 44 can be protected.

[0104] See also Figure 2 and Figure 6 In some embodiments, the first inner shell 21 includes two third walls 215 and a first bottom wall 216. The two third walls 215 are arranged along the second direction Y, and the first top wall 211 and the first bottom wall 216 are arranged along the third direction Z. The first bottom wall 216 connects the two third walls 215, the first top wall 211 connects the two third walls 215, and the first wall 214 connects the first top wall 211, the first bottom wall 216 and the two third walls 215 to form a first receiving space 203a.

[0105] In some embodiments, the third wall 215 is provided with a limiting protrusion 2151, the second extension section 83 is provided with a through hole 831, and the limiting protrusion 2151 is provided in the through hole 831, so that the partition 80 is limited to the two third walls 215, thereby reducing the movement of the partition 80 during installation.

[0106] See also Figure 2 , Figures 5 to 7 In some embodiments, the second inner shell 22 includes two fourth walls 222 and a second top wall 223, the two fourth walls 222 are arranged along the second direction Y, and the second wall 221 connects the second top wall 223 and the two fourth walls 222. One of the fourth walls 222 is connected to one of the third walls 215 to form a first shell side wall 20a of the second shell 20, the other fourth wall 222 is connected to the other third wall 215 to form a second shell side wall 20b of the second shell 20, and the first top wall 211 is connected to the second top wall 223 to form a shell top wall 20c of the second shell 20.

[0107] In some embodiments, the second shell 20 includes a second protrusion 205 extending from the first shell side wall 20a along a direction opposite to the third direction Z, and the second protrusion 205 extends out of the shell top wall 20c.

[0108] Please also read Figure 3 In some embodiments, along the second direction Y, there is a gap 103 between the second protrusion 205 and the top wall 20 c of the housing, and a portion of the circuit board 60 passes through the gap 103 and is exposed at the first opening 202 .

[0109] In some embodiments, the second shell 20 includes a third protrusion 206 extending from the second shell side wall 20 b along a direction opposite to the third direction Z, and the third protrusion 206 extends out of the shell top wall 20 c.

[0110] In some embodiments, the second housing 20 includes a housing extension wall 207, the housing extension wall 207 is connected to the housing top wall 20c, and the housing extension wall 207 protrudes from the housing top wall 20c in a direction opposite to the third direction Z. In the second direction Y, the housing extension wall 207 is spaced apart from the second protrusion 205. In the second direction Y, the first opening 202 penetrates a portion of the housing extension wall 207.

[0111] See also Figure 3 , Figure 5 , Figures 11 to 13 In some embodiments, the battery pack 100 includes a connector 90, which is disposed on the first housing 10, and the connector 90 and the battery cell assembly 30 are arranged along the third direction Z. The connector 90 includes a second bottom wall 91 and a plurality of side walls 92, and the plurality of side walls 92 are connected to the second bottom wall 91 to form a third receiving space 901.

[0112] In some embodiments, the connecting member 90 includes a plurality of extending walls 93 , and the extending walls 93 connect the side of the side wall 92 facing away from the second bottom wall 91 .

[0113] In some embodiments, the connecting member 90 includes four side walls 92 and four extension walls 93, and one extension wall 93 connects one side of the side wall 92 facing away from the second bottom wall 91 along the third direction Z. In some embodiments, the four extension walls 93 extend along a plane perpendicular to the third direction Z.

[0114] In some embodiments, the housing top wall 20c, the second protrusion 205, and the third protrusion 206 form a fourth receiving space 208, and at least a portion of the second bottom wall 91 and the plurality of side walls 92 are disposed in the fourth receiving space 208. The second bottom wall 91 is connected to the housing top wall 20c, and one of the two extending walls 93 disposed along the second direction Y is connected to the second protrusion 205, and the other is connected to the third protrusion 206.

[0115] In some embodiments, the first shell 10 includes a fixing portion 11, which is located inside the first shell 10, and the battery pack 100 includes a fastener 101, which passes through the extension wall 93 and is connected to the fixing portion 11, and is placed on the top wall 20c of the shell through the second bottom wall 91, and the extension wall 93 is placed on the second protrusion 205 and the third protrusion 206, so as to fix the connector 90 in the first shell 10.

[0116] In some embodiments, the side wall 92 opposite to the circuit board 60 has a second opening 94 along the second direction Y. The circuit board 60 includes a first connection position 61 exposed in the first opening 202 . Along the second direction Y, the first connection position 61 overlaps with the second opening 94 .

[0117] In some embodiments, the battery pack 100 includes a terminal 110 and a wiring harness 120, at least part of the wiring harness 120 is disposed in the third receiving space 901, the wiring harness 120 is connected to the first connection position 61, and the connection terminal 110 extends from the second opening 94 to reduce the bending of the wiring harness 120. The terminal 110 is used to connect to an external device, such as an external power device and / or an external charging device.

[0118] In some embodiments, the battery pack 100 includes a top cover 130 , the top cover 130 is connected to the first housing 10 , and the terminal 110 is connected to the top cover 130 and partially exposed outside the top cover 130 .

[0119] See also Fig.14 The present application also provides an electric device 200 using the above-mentioned battery pack 100. In one embodiment, the electric device 200 of the present application can be, but is not limited to, electronic equipment, drones, backup power supplies, electric vehicles, electric motorcycles, electric power-assisted bicycles, electric tools, large household battery modules, etc.

[0120] Those skilled in the art should recognize that the above embodiments are only used to illustrate the present application, and are not used as limitations on the present application. As long as they are within the spirit of the present application, appropriate changes and modifications to the above embodiments are within the scope of the present application.

Claims

1. A battery pack, characterized in that: include: a first shell; A second shell, disposed inside the first shell; A battery cell assembly is disposed in the second shell; A heating element, disposed between the first shell and the second shell, the heating element being electrically connected to the battery core assembly; A heat conducting element is at least partially disposed between the second shell and the heating element.

2. The battery pack according to claim 1, characterized in that: It also includes a circuit board, which is arranged in the second housing, and the circuit board is connected to the battery core assembly; The heating element is connected to a first wire, the second shell includes a wire channel and a first opening, the first wire passes through the wire channel and the first opening, and is connected to the circuit board.

3. The battery pack according to claim 2, characterized in that: The second shell includes a first inner shell and a second inner shell arranged in a first direction, the first inner shell is connected to the second inner shell to form a receiving space, and the battery cell assembly and the circuit board are arranged in the receiving space; The first opening penetrates the second shell along a second direction, the wire channel is provided in the first inner shell and / or the second inner shell, and the first direction is perpendicular to the second direction.

4. The battery pack according to claim 2 or 3, characterized in that: The second housing comprises a first wall, along a first direction, the first wall comprises a first surface and a second surface, and the heating element, the heat conducting element and the first wall are arranged along the first direction; The second surface is provided with a plurality of first recesses, the battery cell assembly includes a plurality of battery cells, the battery cells are provided in the first recesses, and the heat conductive member is connected to the first surface.

5. The battery pack according to claim 4, characterized in that: The first surface is provided with a first convex portion corresponding to the first concave portion, and the heat conductive element connects the first convex portion and the heating element.

6. The battery pack according to claim 4 or 5, characterized in that: The heating element includes a main body connected to the first surface, and along the first direction, a projection of the main body is located within a projection of the heat conducting element.

7. The battery pack according to claim 6, characterized in that: The heating element further comprises an extension portion and a connection portion, the extension portion is connected to the main body portion, the second shell is provided with a limiting recess, and at least a portion of the extension portion is provided in the limiting recess; The connection portion is connected to the main body portion, and the first conductive wire is connected to the connection portion.

8. The battery pack according to claim 7, characterized in that: The first surface is provided with a receiving recess, and the heat conducting member and the main body are arranged in the receiving recess; Along a direction opposite to the first direction, the heat conducting member and the main body do not exceed the receiving recess.

9. The battery pack according to any one of claims 6 to 8, characterized in that: A partition is also included, at least a portion of which is disposed between the heating element and the first shell and covers at least the main body.

10. The battery pack according to any one of claims 4 to 9, characterized in that: It also includes an adhesive component, which bonds the first surface and the heat conductive component.

11. The battery pack according to claim 10, characterized in that: The thermal conductivity of the adhesive is 0.2W / (m·K)-0.4W / (m·K).

12. The battery pack according to claim 3, characterized in that: It also includes a connecting member, the connecting member is arranged on the first shell, the connecting member and the battery cell assembly are arranged along a third direction, and the first direction, the second direction and the third direction are perpendicular to each other; The connecting member is provided with a second opening, the circuit board includes a first connecting position exposed in the first opening, and along the second direction, the first connecting position overlaps with the second opening; It also includes a terminal and a wiring harness, wherein the wiring harness is connected to the first connection position and extends from the second opening to be connected to the terminal.

13. The battery pack according to any one of claims 1 to 12, characterized in that: The heat conducting member includes a metal member or a heat conducting adhesive.

14. An electrical device, characterized in that: Comprising a battery pack as claimed in any one of claims 1 to 13.

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