Heating device, battery pack, battery system and electric equipment

Abstract

The utility model provides a heating device, a battery pack, a battery system and electric equipment. The heating device is used for the battery pack, the battery pack comprises a plurality of battery cell units, the heating device comprises a plurality of heating components, one heating component is used for heating at least one battery cell unit, and the heating power of the plurality of heating components is not completely the same. According to the heating device disclosed by the utility model, the heating power of the plurality of heating components is not completely the same, and the plurality of heating areas with not completely the same power density are constructed, so that the battery cell units at different positions in the battery pack can be heated, and the heating uniformity of the battery pack can be ensured; the charging and discharging efficiency and the cycle life of the battery pack are improved, so that the aging speed of the battery pack is slowed down and the safety risk is reduced.

Description

Technical Field

[0001] The utility model generally relates to the technical field of batteries, and more specifically to a heating device, a battery pack, a battery system and an electrical device. Background Art

[0002] At present, in the prior art, in order to solve the problems of poor charge and discharge performance, reduced capacity, lithium deposition, etc. of the battery at low temperature, active heating is generally used to heat the battery to a suitable temperature to meet the charge and discharge performance requirements.

[0003] However, the heating device in the existing battery pack has low heating uniformity for the battery cells, which is not conducive to improving the overall charging and discharging efficiency and cycle life of the battery pack, thereby accelerating the aging speed of the battery cells and posing certain safety risks. Utility Model Content

[0004] A series of simplified concepts are introduced in the utility model content section, which will be further described in detail in the detailed implementation section. The utility model content section of the utility model does not mean to attempt to define the key features and essential technical features of the technical solution claimed for protection, nor does it mean to attempt to determine the scope of protection of the technical solution claimed for protection.

[0005] In order to at least partially solve the above-mentioned problems, the first aspect of the utility model provides a heating device for a battery pack, wherein the battery pack includes a plurality of battery cell units, and the heating device includes a plurality of heating components, one of the heating components is used to heat at least one battery cell unit, and the heating powers of the plurality of heating components are not exactly the same.

[0006] According to the heating device of the first aspect of the utility model, by setting the heating powers of multiple heating components to be different, a plurality of heating areas with different power densities are constructed, so that the battery cells at different positions in the battery pack can be heated, and the heating uniformity of the battery pack can be ensured, which is beneficial to improving the charging and discharging efficiency and cycle life of the battery pack, thereby slowing down the aging rate of the battery pack and reducing safety risks.

[0007] Optionally, the heating component is provided with a first terminal and a second terminal, and the first terminal of one of two adjacent heating components is conductively connected to the second terminal of the other heating component, so that the heating components are connected in series.

[0008] Optionally, the first terminal and the second terminal are located at the same end of the heating member along the first direction.

[0009] Optionally, the heating device is further provided with a first connector and a second connector, the first connector is conductively connected to the first terminal, the second connector is conductively connected to the second terminal, and the first connector is plug-matched with the second connector.

[0010] Optionally, the heating member extends along a first direction, a plurality of the heating members are arranged along a second direction, and the first direction and the second direction intersect.

[0011] Optionally, the heating component comprises a heating wire, and the heating wires of at least two of the heating components have different line widths and / or lengths.

[0012] Optionally, the heating component further comprises a film member, and the heating wire is arranged in the film member.

[0013] Optionally, the heating wire is bent and extended along the first direction or the second direction.

[0014] Optionally, the heating component is provided with a recessed portion and a raised portion, the recessed portion is used to at least partially accommodate the battery cells of the battery cell unit, the raised portion is used to limit the battery cells of the battery cell unit, and the raised portion and the recessed portion are alternately arranged along the first direction.

[0015] Optionally, the heating device further comprises a bracket, and the heating component is arranged to be attached to the bracket.

[0016] Optionally, the heating component is provided with a bent edge, and the bent edge bypasses the edge of the bracket and extends to a side of the bracket away from the heating component.

[0017] A second aspect of the present invention provides a battery pack, comprising a plurality of battery cell units and the above-mentioned heating device, wherein one heating component is used to heat at least one of the battery cell units.

[0018] According to the battery pack of the second aspect of the utility model, the battery pack has good heating uniformity, which is beneficial to improving the charging and discharging efficiency and cycle life of the battery pack, thereby slowing down the aging speed of the battery pack and reducing safety risks.

[0019] Optionally, the heating device includes a bracket that is fitted with the heating component, and the battery pack also includes thermally conductive adhesive, which is arranged on the surface of the bracket and / or the heating component close to the battery cell unit, and the thermally conductive adhesive is used to fix the battery cell unit.

[0020] Optionally, the heating component extends along a first direction, and a plurality of the heating components are arranged along a second direction, the first direction and the second direction intersect, and a plurality of the battery cell units arranged along the second direction form a battery cell group, at least two battery cell groups are stacked along a third direction, and a plurality of the heating components are arranged at intervals along the third direction and are correspondingly arranged between adjacent battery cell groups, and the third direction is perpendicular to the first direction and the second direction.

[0021] Optionally, the battery pack includes three battery cell groups, the heating device also includes two layers of brackets arranged along the third direction, the heating component is fitted on the bracket, and the heating component is located on a side of the bracket away from the inner side of the battery cell group.

[0022] Optionally, the battery cell of the battery cell unit is a cylindrical battery cell, and the axis of the cylindrical battery cell extends along the second direction.

[0023] A third aspect of the present invention provides a battery system, comprising the battery pack according to the above.

[0024] According to the battery system of the third aspect of the utility model, the heating uniformity of each battery pack is good, which is beneficial to improving the charging and discharging efficiency and cycle life of the battery pack, thereby slowing down the aging speed of the battery pack and reducing safety risks.

[0025] A fourth aspect of the present invention provides an electrical device, comprising the battery pack or the battery system described above.

[0026] According to the electrical equipment of the fourth aspect of the utility model, the heating uniformity of the battery is good, which is beneficial to improving the charging and discharging efficiency and cycle life of the battery, thereby slowing down the aging speed of the battery and reducing safety risks. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The following drawings of the embodiments of the present invention are used as part of the present invention for understanding the present invention. The drawings show the embodiments of the present invention and their descriptions, and are used to explain the principles of the present invention. In the drawings,

[0028] Figure 1 A three-dimensional schematic diagram of a heating device according to a preferred embodiment of the utility model;

[0029] Figure 2 This is a schematic diagram of an explosion of a battery pack along the second direction according to a preferred embodiment of the present invention.

[0030] Figure 3 for Figure 1 An enlarged schematic diagram of part A in FIG.

[0031] Figure 4 for Figure 1 an enlarged schematic diagram of part B in FIG. ; and

[0032] Figure 5 for Figure 2 An enlarged schematic diagram of part C in FIG.

[0033] Description of Reference Numerals

[0034] 100: Battery pack 101: Battery cell unit

[0035] 102: Cylindrical battery cell 110: Heating device

[0036] 120: Heating member 121: Recessed portion

[0037] 122: Raised part 123: Bend edge

[0038] 124: First terminal 125: Second terminal

[0039] 126: first connector 127: second connector

[0040] 130: Bracket 140: Thermal conductive adhesive

[0041] D1: First direction D2: Second direction

[0042] D3: Third direction DETAILED DESCRIPTION

[0043] In the following description, a large number of specific details are given to provide a more thorough understanding of the present invention. However, it is obvious to those skilled in the art that the present invention can be implemented without one or more of these details. In other examples, in order to avoid confusion with the present invention, some technical features known in the art are not described.

[0044] In this document, ordinal numbers such as "first" and "second" cited in the present invention are merely identifiers and do not have any other meanings, such as a specific order, etc. Moreover, for example, the term "first component" itself does not imply the existence of the "second component", and the term "second component" itself does not imply the existence of the "first component".

[0045] In this document, “upper”, “lower”, “front”, “back”, “left”, “right”, etc. are only used to indicate the relative position relationship between related parts, rather than to limit the absolute positions of these related parts.

[0046] In this document, “equal”, “same”, etc. are not strictly limited in a mathematical and / or geometric sense, but also include errors that can be understood by those skilled in the art and are allowed in manufacturing or use.

[0047] Unless otherwise stated, the numerical ranges herein include not only the entire range within its two endpoints but also include several sub-ranges contained therein.

[0048] In the prior art, the heat loss rates of the battery cells 101 at different positions of the battery pack 100 are different, and the amount of heat required for heating is also different. For example, the temperature of the battery cell 101 at the middle position of the battery pack 100 is higher than the temperature of the battery cell 101 at the periphery. Therefore, the existing heating device 110 heats the battery pack 100, resulting in poor uniformity.

[0049] to this end, Figures 1 to 5 A heating device 110 according to the present invention is shown, which is used for a battery pack 100. The battery pack 100 includes a plurality of battery cell units 101. The heating device 110 includes a plurality of heating components 120. One heating component 120 is used to heat at least one battery cell unit 101. The heating powers of the plurality of heating components 120 are not completely the same.

[0050] According to the heating device 110 of the utility model, by setting the heating powers of multiple heating components 120 to be different, a plurality of heating areas with different power densities are constructed, so that the battery cells 101 at different positions in the battery pack can be heated, and the heating uniformity of the battery pack 100 can be ensured, which is beneficial to improving the charging and discharging efficiency and cycle life of the battery pack 100, thereby slowing down the aging speed of the battery pack 100 and reducing safety risks.

[0051] Alternatively, if Figure 1 and Figure 2 As shown, the heating member 120 extends along a first direction D1 , and a plurality of heating members 120 are arranged along a second direction D2 , and the first direction D1 and the second direction D2 intersect.

[0052] Preferably, refer to Figure 1 and Figure 2 The first direction D1 and the second direction D2 are arranged perpendicular to each other, so that the battery cell units 101 and the heating components 120 are arranged in a rectangular shape, making the structure of the battery pack 100 more compact.

[0053] Figure 2 A battery pack 100 according to the present invention is shown, the battery pack 100 comprises a plurality of battery cells 101, the plurality of battery cells 101 are arranged along a second direction D2, and the plurality of battery cells 101 can be connected in series or in parallel. Figure 2It can be seen that a battery cell unit 101 includes multiple battery cells arranged along the first direction D1, the battery cells can be cylindrical battery cells 102, and the multiple battery cells can be connected in series or in parallel. Of course, a battery cell unit 101 can also include only one battery cell, which should also be within the protection scope of the present utility model.

[0054] Alternatively, if Figure 2 As shown, one heating component 120 is correspondingly disposed at one battery cell unit 101 for heating the corresponding battery cell unit 101. In addition, one heating component 120 may also correspond to two or more battery cells 101, and the arrangement of the heating components 120 may be set according to the heating area of ​​the battery pack 100.

[0055] Optionally, the plurality of heating components 120 may be arranged at intervals along the second direction D2 , or heat insulating members may be provided between adjacent heating components 120 , and the arrangement may be performed accordingly according to the heating area requirements of the battery pack 100 .

[0056] The heating powers of the multiple heating components 120 are not completely the same, so optionally, the multiple heating components 120 or a single heating component 120 are configured to form multiple heating areas with different power densities, and the multiple heating areas are used to be correspondingly arranged in multiple battery cells 101. By configuring multiple heating components 120 to form multiple heating areas with different power densities, it can be applied to battery cells 101 with different heat dissipation environments, and the heating uniformity of the battery pack 100 can be guaranteed, which is conducive to improving the charging and discharging efficiency and cycle life of the battery pack 100, thereby slowing down the aging speed of the battery pack 100 and reducing safety risks.

[0057] Reference Figure 3 and Figure 4 , the heating member 120 is provided with a first terminal 124 and a second terminal 125 .

[0058] The first terminal 124 of one of the two adjacent heating components 120 is conductively connected to the second terminal 125 of the other heating component 120 , so that the heating components 120 are connected in series, and the two heating components 120 can generate heat when powered on.

[0059] Of course, the two heating components 120 may also be connected in parallel via their respective first terminals 124 and second terminals 125 , so that the two heating components 120 can be powered on to generate heat.

[0060] Optionally, the first terminal 124 and the second terminal 125 are located at the same end of the heating component 120 along the first direction D1, so as to facilitate the connection of the heating component 120 and improve the assembly efficiency of the heating device 110.

[0061] Furthermore, the heating device is also provided with a first connector 126 and a second connector 127. The first connector 126 is conductively connected to the first terminal 124, and the second connector 127 is conductively connected to the second terminal 125. The first connector 126 and the second connector 127 are plugged into each other, so as to realize the connection between the heating components 120 and between the heating components 120 and the external power supply.

[0062] Specifically speaking of the structure of the heating component 120, the heating component 120 includes a film member and a heating wire. The heating wire is arranged in the film member, so that the film member has good protection and insulation effects on the heating wire. The film member is relatively soft, and the heating wire has a certain ductility, which makes it easy to process the heating component 120 into a structural shape that fits the battery cell unit 101 or the battery frame structure (such as the bracket 130 described later).

[0063] Optionally, the two ends of the heating wire are connected to the first terminal 124 and the second terminal 125 respectively through leads, and protective silicone can be provided at the corresponding welding point positions for insulation protection. In addition, the two ends of the heating wire can be provided to be led out from the same side of the film member, so as to facilitate the connection and provision of the first plug connector 126 and the second plug connector 127.

[0064] Optionally, the heating power of the heating member 120 may be adjusted by adjusting the line width and length of the heating wire in the heating member 120 .

[0065] Furthermore, along the first direction D1, the heating wire is bent and extended in an S-shape along the surface of the film member, so that the heating power of the heating wire has good uniformity in both the first direction D1 and the second direction D2.

[0066] Optionally, the heating wire may also be bent and extended along the second direction D2.

[0067] In the case where the heating wire is bent in the heating member 120, the heating power of a single heating member 120 can be adjusted by adjusting the line width of the heating wire (i.e., the cross section of the heating wire) or the spacing between the heating wires. For example, the larger the spacing between the heating wires, the lower the density of the heating wires in the heating member 120, and the lower the heating power of a single heating member 120. Conversely, the smaller the spacing between the heating wires, the higher the density of the heating wires in the heating member 120, and the higher the heating power of a single heating member 120. Heating members 120 with different heating powers can form heating areas with different power densities (ratio of total heating power to heating area area), so as to be suitable for heating battery cells 101 with different heat dissipation environments. Similarly, the larger the line width of the heating wire in the heating member 120, the smaller the total resistance value of the heating wire, and the lower the heating power of a single heating member 120. The smaller the line width of the heating wire in the heating member 120, the larger the total resistance value of the heating wire, and the higher the heating power of a single heating member 120.

[0068] In actual design, the shape of the heating wire in the film is generally determined first (eg, spacing, total length, arrangement, etc.), and then heating wires with different line widths are selected according to the heating components 120 with different heating powers.

[0069] In an alternative solution, different heating areas can also be formed by a single heating component 120. For example, the heating wires can be arranged in different areas in the heating component 120 according to the spacing and line width of the heating wires to form heating areas with different heating power densities, thereby heating the battery cell units 101 with different heat dissipation environments, which should also fall within the scope of protection of the present utility model.

[0070] Reference Figure 1 and Figure 2 The heating member 120 is provided with a recessed portion 121 and a raised portion 122, and the raised portion 122 and the recessed portion 121 are alternately arranged along the first direction D1, so that the heating member 120 is wavy or S-shaped and extends along the first direction D1, which is suitable for assembling the battery cell unit 101 composed of cylindrical battery cells 102. When the heating member 120 is assembled to the battery cell unit 101, the recessed portion 121 at least partially accommodates the cylindrical battery cells 102 of the battery cell unit 101, and the raised portion 122 is located between adjacent cylindrical battery cells 102 along the first direction D1, so as to have a good limiting effect on the cylindrical battery cells 102.

[0071] Reference Figure 2 The heating device 110 further includes a bracket 130 , and the heating component 120 is attached to the bracket 130 , so as to support the heating component 120 , so that the heating component 120 is not easily separated from the battery cell unit 101 .

[0072] Furthermore, the heating device 110 also includes a thermally conductive adhesive 140 , which is disposed on the surface of the bracket 130 and the heating component 120 close to the battery cell unit 101 . The thermally conductive adhesive 140 is used to fix the battery cell unit 101 , and the thermally conductive adhesive 140 can transfer the heat of the heating component 120 to the battery cell unit 101 .

[0073] Reference Figure 2 The utility model further provides a battery pack 100, comprising a plurality of battery cells 101 and a heating device 110 according to the above, wherein a heating member 120 is used to heat at least one battery cell 101. According to the battery pack 100 of the utility model, the heating uniformity of the battery pack 100 is good, which is conducive to improving the charging and discharging efficiency and cycle life of the battery pack 100, thereby slowing down the aging speed of the battery pack 100 and reducing safety risks.

[0074] Optionally, the heating device 110 includes a bracket 130 that is fitted with the heating component 120, and the battery pack 100 also includes a thermally conductive adhesive 140, which is arranged on the surface of the bracket 130 and the heating component 120 close to the battery cell unit 101. The thermally conductive adhesive 140 is used to fix the battery cell unit 101, and the thermally conductive adhesive 140 also has an insulating effect.

[0075] Alternatively, if Figure 2 As shown, the bracket 130 may be arranged in a one-to-one correspondence with the heating component 120 , or a plurality of heating components 120 may be arranged on one bracket 130 .

[0076] Alternatively, if Figure 2 As shown, the battery cell of the battery cell unit 101 is a cylindrical battery cell 102, and the axis of the cylindrical battery cell 102 extends along the second direction D2, which is adapted to the shape of the heating component 120, is more closely fitted to the heating component 120, and has a higher heating efficiency.

[0077] Optionally, multiple battery cell units 101 are arranged along the second direction D2, the heating component 120 extends along the first direction D1, and multiple heating components 120 are arranged along the second direction D2, and the first direction D1 and the second direction D2 intersect. The heating device 110 includes multiple heating components 120, and multiple battery cell units 101 arranged along the second direction D2 are battery cell groups, and three battery cell groups are stacked along the third direction D3. Multiple heating components 120 are arranged at intervals along the third direction D3 and are correspondingly arranged between adjacent battery cell groups, and the third direction D3 is perpendicular to the first direction D1 and the second direction D2. Therefore, the heating area formed by the multiple heating components 120 of the heating device 110 can be adapted to the temperature environment of the three battery cell groups for heating.

[0078] Reference Figure 2 Since the battery cell group located on the inner side along the third direction D3 has two layers of heating components 120 for heating, correspondingly, the heating device includes two layers of brackets 130 arranged along the third direction D3, the heating components 120 and the brackets 130 are arranged one by one, and the heating components 120 can be located on the side of the bracket 130 away from the inner battery cell group, so that the bracket 130 has a blocking effect on the heating component 120 being transmitted to the inner battery cell unit 101, so that the inner battery cell unit 101 will not heat up too quickly, thereby making the heating uniformity and consistency between the three-layer battery cell groups better.

[0079] In actual situations, the battery pack 100 according to the present invention can be arranged in a vertically spaced arrangement, that is, the third direction D3 is the vertical direction. Therefore, the bottom layer of the heating component 120 cannot be effectively supported by the bracket 130 because it is located under the bracket 130, and the solder joint protective silicone and lead wires of the heating component 120 are easy to fall off under vibration conditions. Optionally, combined with Figure 5As shown, the heating component 120 is provided with a bending edge 123, which bypasses the edge of the bracket 130 and extends to the upper side of the bracket 130, so that the bottom layer of the heating component 120 and the bracket 130 have an effective connection, thereby preventing the solder joint protective silicone and the lead of the heating component 120 from falling off under vibration conditions.

[0080] Alternatively, if Figure 2 and Figure 5 As shown, four edge positions of the heating component 120 perpendicular to the third direction D3 can be provided with bent edges 123 to further strengthen the connection between the heating component 120 and the heating component 120 .

[0081] Alternatively, if Figure 1 and Figure 3 As shown, two heating components 120 adjacent to each other along the second direction D2 are connected by a first connector 126 and a second connector 127, and as shown in FIG. Figure 4 As shown, two adjacent first connectors 126 and second connectors 127 are led out as a main interface for connecting a power distribution component (such as an external power supply) of the battery pack 100, so that the heating components 120 on the same layer are connected in series to provide voltage to the heating components 120 on the same layer to make the heating components 120 generate heat. The two main interfaces can be flexibly set according to the position of the power distribution component.

[0082] Alternatively, if Figure 3 As shown, two adjacent heating components 120 along the third direction D3 are connected through the first connector 126 and the second interface connector, so that the heating components 120 of different layers are connected in series, and the series connection between the heating components 120 is realized. By setting different resistance values ​​of the heating components 120, the heating power of the heating components 120 can be adjusted accordingly. For example, the heat dissipation environment of the battery cell group at the bottom layer is better, so the power density of the heating area formed by the heating components 120 at the bottom layer should be greater than the power density of the heating area formed by the heating components 120 at the top layer.

[0083] In addition, the heating device 110 according to the present invention can also be adjusted according to the arrangement of the battery pack 100 or the battery cell units 101 in the battery pack 100, and is not limited to the following. Figure 2 The arrangement shown.

[0084] The utility model also provides a battery system, comprising the battery pack 100 according to the above. According to the battery system of the utility model, the heating uniformity of each battery pack 100 of the battery pack 100 is good, which is conducive to improving the charging and discharging efficiency and cycle life of the battery pack 100, thereby slowing down the aging speed of the battery pack 100 and reducing safety risks.

[0085] The utility model also provides an electric device, including the battery pack 100 or a battery system according to the above. According to the electric device of the utility model, the heating uniformity of the battery is good, which is conducive to improving the charging and discharging efficiency and cycle life of the battery, thereby slowing down the aging speed of the battery and reducing safety risks.

[0086] Optionally, the electric device includes a vehicle, an electric two-wheeled vehicle, an electric multi-wheeled vehicle, an unmanned aerial vehicle, a ship, an energy storage cabinet, a computer, a laptop computer, an electric toy, etc. The electric device includes a battery, or a battery pack 100, or a battery pack 100, for supplying power to the electric device.

[0087] The electric device of the embodiment of the present utility model is illustrated by taking a vehicle as an example. Specifically, the electric device also includes a vehicle body, and the battery pack 100 or the battery pack 100 is installed on the vehicle body. In this embodiment, the vehicle body includes a chassis. The battery pack 100 is installed on the chassis.

[0088] Unless otherwise defined, the technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art in the technical field of the present invention. The terms used herein are only for describing specific implementation purposes and are not intended to limit the present invention. Terms such as "setting" appearing in this article may indicate that one component is directly attached to another component, or that one component is attached to another component through an intermediate. Features described in this article in one embodiment may be applied to another embodiment alone or in combination with other features, unless the feature is not applicable in the other embodiment or otherwise specified.

[0089] The utility model has been described through the above embodiments, but it should be understood that the above embodiments are only for the purpose of example and description, and are not intended to limit the utility model to the described embodiments. It can be understood by those skilled in the art that more variations and modifications can be made according to the teachings of the utility model, and these variations and modifications all fall within the scope of the protection claimed by the utility model.

Claims

1. A heating device, characterized in that: Used for a battery pack, the battery pack includes a plurality of battery cell units, the heating device includes a plurality of heating components, one of the heating components is used to heat at least one battery cell unit, and the heating powers of the plurality of heating components are not completely the same.

2. The heating device according to claim 1, characterized in that The heating components are provided with a first terminal and a second terminal. The first terminal of one of two adjacent heating components is conductively connected to the second terminal of the other heating component, so that the heating components are connected in series.

3. The heating device according to claim 2, characterized in that: The first terminal and the second terminal are located at a same end of the heating member along a first direction.

4. The heating device according to claim 2, characterized in that: The heating device is further provided with a first plug connector and a second plug connector, wherein the first plug connector is conductively connected to the first terminal, the second plug connector is conductively connected to the second terminal, and the first plug connector is plug-matched with the second plug connector.

5. The heating device according to claim 1, characterized in that: The heating member extends along a first direction, and a plurality of the heating members are arranged along a second direction, and the first direction and the second direction intersect.

6. The heating device according to claim 1, characterized in that: The heating components include heating wires, and the heating wires of at least two of the heating components have different line widths and / or lengths.

7. The heating device according to claim 6, characterized in that The heating component further comprises a film member, and the heating wire is arranged in the film member.

8. The heating device according to claim 6, characterized in that The heating wire is bent and extended along the first direction or the second direction.

9. The heating device according to claim 5, characterized in that: The heating component is provided with a recessed portion and a raised portion, the recessed portion is used to at least partially accommodate the battery cells of the battery cell unit, the raised portion is used to limit the battery cells of the battery cell unit, and the raised portion and the recessed portion are alternately arranged along the first direction.

10. The heating device according to any one of claims 1 to 9, characterized in that: The heating device further comprises a bracket, and the heating component is attached to the bracket.

11. The heating device according to claim 10, characterized in that The heating component is provided with a bent edge, and the bent edge bypasses the edge of the bracket and extends to a side of the bracket away from the heating component.

12. A battery pack, characterized in that: The invention comprises a plurality of battery cells and the heating device according to any one of claims 1 to 11, wherein one heating member is used to heat at least one of the battery cells.

13. The battery pack according to claim 12, characterized in that: The heating device includes a bracket that is fitted with the heating component. The battery pack also includes a thermally conductive adhesive that is disposed on a surface of the bracket and / or the heating component close to the battery cell unit and is used to fix the battery cell unit.

14. The battery pack according to claim 12, characterized in that: The heating component extends along a first direction, and a plurality of the heating components are arranged along a second direction, the first direction and the second direction intersect, and a plurality of the battery cell units arranged along the second direction form a battery cell group, at least two battery cell groups are stacked along a third direction, and a plurality of the heating components are arranged at intervals along the third direction and are correspondingly arranged between adjacent battery cell groups, and the third direction is perpendicular to the first direction and the second direction.

15. The battery pack according to claim 14, characterized in that: The battery pack includes three battery cell groups, the heating device also includes two layers of brackets arranged along the third direction, the heating component is attached to the brackets, and the heating component is located on a side of the bracket away from the battery cell group on the inner side.

16. The battery pack according to any one of claims 12 to 15, characterized in that: The battery cell of the battery cell unit is a cylindrical battery cell, and the axis of the cylindrical battery cell extends along the second direction.

17. A battery system, characterized in that: Comprising a battery pack according to any one of claims 12 to 16.

18. An electrical equipment, characterized in that: A battery pack according to any one of claims 12 to 16 or a battery system according to claim 17.

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