Battery pack and electric equipment

Abstract

The embodiment of the utility model provides a battery pack and electric equipment, the battery pack comprises a plurality of battery packs and heating sheets, the battery packs comprise a plurality of batteries arranged along a second direction, the plurality of battery packs are arranged at intervals along a first direction, the heating sheets are connected between two adjacent battery packs, and the heating sheets are used for heating the adjacent battery packs; wherein the heating sheet comprises a plurality of heating cores, a plurality of insulating parts and an electric connecting part; the insulating parts are arranged at intervals in the first direction, at least one heating core is clamped between every two adjacent insulating parts, the electric connecting parts are electrically connected with the heating cores, and the first direction is the thickness direction of the heating cores and the insulating parts. The heating piece is arranged between the adjacent battery packs to heat the two battery packs at the same time, and the multiple heating cores are arranged in the heating piece, so that the power density of the heating piece is improved, the charging performance and the safety performance of the heating piece are guaranteed, and the overall service life of the battery pack is prolonged.

Description

Technical Field

[0001] This application belongs to the field of battery technology, specifically relating to a battery pack and electrical equipment. Background Technology

[0002] Under low-temperature conditions, the charging rate of the battery pack decreases, and the charging performance of the battery pack is poor, which affects the battery life of the electrical equipment. Using heating elements to heat the battery pack can improve the charging rate, but due to the limitation of the power density of the heating elements, the effect of heating elements on improving the charging performance of the battery pack is limited.

[0003] In related technologies, the power density of the heating element can be increased by increasing its size. However, while increasing the size of the heating element can improve its power density, it also increases the risk of dry burning, making it difficult to guarantee the charging safety performance of the battery pack under low-temperature conditions. Utility Model Content

[0004] This application aims to provide a battery pack and electrical device to solve the problem that while existing battery packs can increase the charging rate through heating elements under low-temperature conditions, it is difficult to guarantee charging safety.

[0005] To solve the above-mentioned technical problems, this application is implemented as follows:

[0006] In a first aspect, this application discloses a battery pack having intersecting first and second directions, characterized in that it comprises: a plurality of battery packs and a heating element, wherein each battery pack includes a plurality of batteries arranged along the second direction, the plurality of battery packs are spaced apart along the first direction, and the heating element is connected between adjacent battery packs for heating adjacent battery packs; wherein...

[0007] The heating element includes multiple heating cores, multiple insulating components, and electrical connectors; the multiple insulating components are spaced apart along a first direction, and at least one heating core is sandwiched between two adjacent insulating components; the electrical connectors are electrically connected to the multiple heating cores respectively, and the first direction is the thickness direction of the heating cores and the insulating components.

[0008] Optionally, a plurality of heating cores are sandwiched between two adjacent insulating members, and the plurality of heating cores between two adjacent insulating members are stacked along the first direction; or, the plurality of heating cores between two adjacent insulating members are continuously arranged along the second direction.

[0009] Optionally, a heating core is sandwiched between two adjacent insulating members, wherein the heating core includes a heating part and a first lead-out part arranged along the second direction, the insulating member includes a main body part and a second lead-out part arranged along the second direction, the battery pack, the main body part and the heating part are arranged opposite to each other along the first direction, the second lead-out part and the first lead-out part are arranged opposite to each other along the first direction and are at least partially exposed to the adjacent battery pack, and the electrical connector is electrically connected to the first lead-out part.

[0010] Optionally, among the plurality of heating elements, the first lead-out portion of some of the heating elements is disposed on one side of the heating element along the second direction, and the first lead-out portion of the remaining heating elements is disposed on the other side of the heating element along the second direction; the number of electrical connectors is plurality of, and the plurality of electrical connectors are respectively electrically connected to the first lead-out portions on both sides of the plurality of heating elements along the second direction.

[0011] Optionally, the first leads of the plurality of heating elements are disposed on the same side of the heating element along the second direction, and the electrical connector is electrically connected to the first leads of the plurality of heating elements.

[0012] Optionally, the electrical connector portion is exposed outside the second lead-out portion, and the heating element further includes an insulating portion that covers the portion of the electrical connector exposed outside the second lead-out portion.

[0013] Optionally, the electrical connector includes a pad and a wire, wherein the wire is electrically connected to the pad, the pad is electrically connected to the first lead-out portion, the wire is used to connect to an external circuit, and conducts electricity to the heating core through the pad.

[0014] Optionally, the heating element is provided with a conductive hole that penetrates the first lead-out portion and the second lead-out portion. A conductive layer is provided on the inner wall of the conductive hole, and the conductive layer at least covers the inner wall of the second lead-out portion. The pad is electrically connected to the conductive layer and the first lead-out portion.

[0015] Optionally, among the plurality of insulating elements, the outermost insulating element is the first insulating element, and the remaining insulating elements are the second insulating elements; wherein,

[0016] The first insulating component includes an epoxy resin board, and the second insulating component includes one or more of an epoxy resin board, a thermally conductive silicone board, and a mica board.

[0017] Secondly, this application also discloses an electrical device, including the battery pack described above.

[0018] In this embodiment, multiple battery packs are spaced apart along a first direction, and each battery pack includes multiple batteries arranged along a second direction. A heating element is positioned between adjacent battery packs to simultaneously heat multiple batteries in the battery packs on both sides of the heating element, improving the battery pack's performance under low-temperature conditions. Further, the heating element includes multiple spaced-apart insulating members and multiple heating cores. At least one heating core is sandwiched between adjacent insulating members, and the outermost two sides of the heating element are both insulating members. This not only prevents short circuits between heating cores and between heating cores and battery packs but also improves the overall strength of the heating element. All heating cores are electrically connected to electrical connectors, allowing simultaneous energization for heating. When multiple heating cores can generate heat together, a single heating core with lower power can be selected. This increases the power density of the heating element while reducing the risk of dry burning caused by excessively high power density in a single heating core, ensuring the heating element's safety performance. In this embodiment, the heating element is positioned between adjacent battery packs and can simultaneously heat two battery packs. By incorporating multiple heating cores within the heating element, the power density of the heating element is increased, ensuring its charging and safety performance, and ultimately improving the overall lifespan of the battery pack.

[0019] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0020] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0021] Figure 1 This is a schematic diagram of the structure of a heating element in an embodiment of this application;

[0022] Figure 2 This application Figure 1 Enlarged diagram of section A in the middle;

[0023] Figure 3 This is a front view of a heating element in an embodiment of this application;

[0024] Figure 4 This is a top view of a heating element in an embodiment of this application;

[0025] Figure 5 This is a side view of a heating element in an embodiment of this application;

[0026] Figure 6 This is a schematic diagram of another heating element in an embodiment of this application;

[0027] Figure 7 This application Figure 6 Enlarged schematic diagram of section B in the middle;

[0028] Figure 8 This is a front view of another heating element in an embodiment of this application;

[0029] Figure 9 This is a top view of another heating element in an embodiment of this application;

[0030] Figure 10 This is a side view of another heating element in an embodiment of this application;

[0031] Figure 11 This is a schematic diagram of the structure of another heating element in the embodiments of this application;

[0032] Figure 12 This application Figure 11 Enlarged diagram of section C;

[0033] Figure 13 This is a front view of another heating element in an embodiment of this application;

[0034] Figure 14 This is a top view of another heating element in an embodiment of this application;

[0035] Figure 15 This is a side view of another heating element in an embodiment of this application;

[0036] Figure 16 This is a schematic diagram of the battery pack structure in an embodiment of this application;

[0037] Figure 17 This is a top view of the battery pack in an embodiment of this application.

[0038] Reference numerals: 100 - heating element, 10 - heating core, 11 - heating part, 12 - first lead-out part, 20 - insulating part, 21 - main body part, 22 - second lead-out part, 201 - epoxy resin board, 202 - thermally conductive silicone board, 203 - mica board, 30 - electrical connector, 31 - solder pad, 32 - wire, 40 - insulating part, 200 - battery pack, 2001 - battery, x - first direction, y - second direction. Detailed Implementation

[0039] The embodiments of this application will now be described in detail. Examples of these embodiments are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0040] The terms "first" and "second" in the specification and claims of this application may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise stated, "multiple" means two or more. Furthermore, "and / or" in the specification and claims indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0041] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0042] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0043] The battery pack provided in the embodiments of this application will now be described in further detail with reference to the accompanying drawings and specific implementation details.

[0044] It should be noted that the battery pack provided in this application embodiment has intersecting first direction x and second direction y. In a preferred embodiment, the first direction x and second direction y are perpendicular to each other. Perpendicularity includes a reasonable angle range with a certain degree of fluctuation from 90°, which can achieve the technical effect required by this application, for example, 90°±10°.

[0045] Reference Figure 16 , Figure 17 The diagram shows a schematic representation of the battery pack structure in an embodiment of this application. Figure 16 , Figure 17As shown, the battery pack disclosed in this application may specifically include: multiple battery packs 200 and a heating element 100, wherein the battery pack 200 includes multiple batteries 2001 arranged along the second direction y, the multiple battery packs 200 are spaced apart along the first direction x, the heating element 100 is connected between two adjacent battery packs 200, and the heating element 100 is used to heat the adjacent battery packs 200; wherein the heating element 100 includes multiple heating cores 10, multiple insulating members 20 and electrical connectors 30; the multiple insulating members 20 are spaced apart along the first direction x, at least one heating core 10 is sandwiched between two adjacent insulating members 20, and the electrical connectors 30 are electrically connected to the multiple heating cores 10 respectively, and the first direction x is the thickness direction of the heating cores 10 and the insulating members 20.

[0046] Specifically, according to the heating element 100 structure provided in the embodiments of this application, the heating element 100 is formed by stacking and connecting an insulating component 20 and a heating core 10. The insulating component 20 and the heating core 10 can be bonded together using a high-temperature curing adhesive. Furthermore, the outermost part of the heating element is the insulating component 20, and the heating core 10 is placed inside the heating element 100, which can effectively prevent short circuits between the heating element 100 and the external environment. In practical applications, the electrical connector 30 can be used to connect to an external circuit to supply power to the heating core 10, causing the heating core 10 to heat up. In addition, multiple heating cores 10 are electrically connected to the electrical connector 30, and can be powered on simultaneously to achieve the heating function. When multiple heating cores 10 can generate heat together, a single heating core 10 with a lower power can be selected. While increasing the power density of the heating element 100, it also helps to reduce the risk of dry burning caused by excessive power density of a single heating core 10, ensuring the safety performance of the heating element 100.

[0047] Furthermore, the multiple batteries of the battery pack 200 are arranged along the second direction y, and the heating element 100 is disposed between adjacent battery packs 200. The heat generated by the heating element 100 can be conducted to the batteries 2001 on both sides along the first direction x, which can ensure that each battery 2001 in the battery pack 200 can contact the heating element 100 and receive the heat generated by the heating element 100. This helps to achieve uniform heat distribution inside the battery pack 200, avoid performance degradation or safety hazards caused by excessive local temperature. It not only helps to shorten the preheating time of the battery pack in low temperature environment, but also maintains the temperature consistency between the batteries 2001 during charging, preventing battery performance differences or damage caused by excessive temperature difference.

[0048] In one embodiment of this application, a heating core 10 is sandwiched between two adjacent insulating elements 20, and the insulating elements 20 and the heating core 10 are alternately arranged. It is understood that the design of a single heating core 10 makes the heat distribution within the heating element 100 more uniform, avoiding local overheating caused by improper spacing of multiple heating cores 10. Uniform heating also promotes the effective heat transfer between battery packs 200, improving the overall heating efficiency. In addition, the power of a single heating core 10 is relatively low, which can effectively reduce the risk of dry burning caused by excessive power density even under long-term operation or abnormal operating conditions. Combined with the dual protection of the insulating elements 20, the electrical isolation performance between the heating element 100 and the battery pack 200 is further improved, enhancing the overall safety performance of the system.

[0049] In other embodiments of this application, the heating core 10 sandwiched between two adjacent insulating members 20 may not be limited to one. This application does not specifically limit the arrangement of the heating core 10 sandwiched between two adjacent insulating members 20. For example, multiple heating cores 10 may be sandwiched between two adjacent insulating members 20. The multiple heating cores 10 may be arranged sequentially along the second direction x, and the multiple heating cores 10 may be electrically connected to realize the conduction of the circuit, ensuring that the multiple heating cores 10 between adjacent insulating members 20 can heat up simultaneously. In addition, the multiple heating cores 10 may also be stacked along the first direction. When the multiple heating cores 10 are stacked along the first direction, it is also beneficial to increase the heating power of the heating element 100.

[0050] The heating principle of the heating element 100 is based on the resistance heating effect of the heating core 10. The heating core 10 can be formed by connecting high-resistance materials such as copper, steel, semiconductors, or special composite materials onto a polyimide film (PI film). When the heating core 10 is energized, the current passes through the high-resistance material, and the electrical energy is converted into heat energy. When the heating element 100 is connected between adjacent battery packs 200, the heat can be transferred to the battery packs 200 and improve the performance of the battery pack under low-temperature conditions.

[0051] It should be noted that in this embodiment of the application, multiple heating elements 10 are provided, so that multiple low-power heating elements 10 can be stacked to generate heat, reducing the risk of dry burning caused by excessive power density of a single heating element 10. At the same time, the insulating element 20 is attached to the heating element 10, which not only plays an insulating role, but also makes the heating element 100 have high overall strength.

[0052] Optionally, a heating core 10 is sandwiched between two adjacent insulating members 20. The heating core 10 includes a heating part 11 and a first lead-out part 12 arranged along the second direction y. The insulating member 20 includes a main body part 21 and a second lead-out part 22 arranged along the second direction y. The battery pack 200, the main body part 21 and the heating part 11 are arranged opposite to each other along the first direction x. The second lead-out part 22 and the first lead-out part 12 are arranged opposite to each other along the first direction x and are at least partially exposed to the adjacent battery pack 200. The electrical connector 30 is electrically connected to the first lead-out part 12.

[0053] Specifically, in this embodiment, since the heating core 10 and the insulating member 20 are alternately arranged, the first lead-out portion 12 and the second lead-out portion 22 are also alternately arranged and overlapped. The first lead-out portion 12 can be used to connect the electrical connector 30 to supply power to the heating core 10 in the heating element 100 through an external circuit. The heating part 11 of the heating core 10 serves as the main heating area, used to generate heat and transfer the heat to the battery pack 200 through the main body 21 of the insulating member 20.

[0054] In this embodiment, since the electrical connector 30 requires a certain amount of space, the first lead-out portion 12 and the second lead-out portion 22 are exposed outside the battery pack 200. This avoids interference between the electrical connector 30 and the assembly of the heating element 100 and the battery pack 200, allowing the battery pack 200, the main body 21 of the insulating component 20, and the heating element 11 of the heating core 10 to be arranged tightly and orderly relative to each other along the first direction x, ensuring that heat can be efficiently and evenly transferred to the battery pack 200. Simultaneously, this layout not only facilitates the installation and connection of the electrical connector 30 but also reduces heat transfer obstacles caused by material overlap or obstruction. Furthermore, the exposed design facilitates subsequent maintenance and repair work, reducing maintenance costs.

[0055] In some optional embodiments of this application, such as Figures 1 to 5 As shown, among the multiple heating elements 10, the first lead-out portion 12 of some heating elements 10 is disposed on one side of the heating part 11 along the second direction y, and the first lead-out portion 12 of the remaining heating elements 10 is disposed on the other side of the heating part 11 along the second direction y; there are multiple electrical connectors 30, and the multiple electrical connectors 30 are respectively electrically connected to the first lead-out portions 12 on both sides of the multiple heating elements 10 along the second direction y. In the embodiments of this application, the multiple electrical connectors can be two or more.

[0056] Specifically, the multiple heating elements 10 of the heating element 100 are connected to an external circuit via electrical connectors 30 connected to the first lead-out portions 12 on both sides, so as to heat some of the heating elements 10 through two lines respectively.

[0057] It should be noted that this configuration results in a more balanced current distribution among the multiple heating elements 10, reducing differences in heating effect and potential safety hazards caused by uneven current distribution. Furthermore, this design allows for the control of heating elements 10 within a subset of the heating elements 10 when the heating element 100 is energized, adapting to various heating requirements and enhancing the flexibility and versatility of the heating element 100's applications. For example, at lower temperatures, energizing one electrical connector 30 will cause the heating element 10 connected to that connector to heat up. At even lower temperatures, energizing all electrical connectors 30 will allow multiple heating elements 10 to heat up simultaneously, further increasing the charging rate and ensuring effective charging under low-temperature conditions.

[0058] In other alternative embodiments of this application, such as Figures 6 to 15 As shown, the first lead-out portion 12 of the plurality of heating elements 10 is disposed on the same side of the heating element 11 along the second direction y, and the electrical connector 30 is electrically connected to the first lead-out portion 12 of the plurality of heating elements 10.

[0059] In practical applications, by uniformly arranging the first leads 12 of multiple heating elements 10 on the same side of the heating element 11 along the second direction y, a single electrical connector 30 can be used to centrally connect the first leads 12 of the multiple heating elements 10. This improves the utilization rate of the internal space of the battery pack, simplifies the design of the battery pack heating system, and reduces costs. Specifically, this layout reduces the number of electrical connectors 30, simplifies the electrical connection structure, and thus reduces manufacturing costs and assembly complexity. Furthermore, the centralized connection method facilitates overall electrical performance testing and maintenance, improving the reliability and maintainability of the system.

[0060] Furthermore, when the first lead-out portions 12 of multiple heating elements 10 are on the same side of the heating element 11 along the second direction y, multiple electrical connectors 30 may be provided to connect one or more of the first lead-out portions 12 respectively. This application does not make specific limitations on this.

[0061] Optionally, the electrical connector 30 is partially exposed at the second lead-out portion 22, and the heating element 100 also includes an insulating portion 40 that covers the portion of the electrical connector 30 exposed at the second lead-out portion 22.

[0062] Understandably, by adding an insulating portion 40 to the portion of the electrical connector 30 exposed above the second lead-out portion 22, the electrical safety and overall reliability of the battery pack heating system are further improved. Specifically, the covering of the insulating portion 40 effectively isolates the electrical connector 30 from direct contact with the external environment, preventing safety hazards such as short circuits and leakage caused by external factors such as moisture, dust, and other impurities. It also enhances the electrical insulation performance of the heating element 100 and reduces the risk of fire and explosion that may be caused by electrical faults, thus ensuring the safe operation of the battery pack.

[0063] In specific applications, the insulating part 40 can be made of a material with low thermal conductivity but excellent insulation performance. For example, in the embodiments of this application, the insulating part 40 is formed of silicone material. Those skilled in the art can also choose other materials with absolute properties to form the insulating part 40. This application does not make specific limitations in this regard.

[0064] Furthermore, the electrical connector 30 includes a pad 31 and a wire 32, wherein the wire 32 is electrically connected to the pad 31, the pad 31 is electrically connected to the first lead-out portion 12, the wire 32 is used to connect to an external circuit, and conducts electricity to the heating core 10 through the pad 31.

[0065] In this embodiment, by introducing a combination of pads 31 and wires 32 as electrical connectors 30, the electrical connection structure between the heating element 10 and the external circuit in the battery pack heating system is significantly optimized. Specifically, the pads 31 typically have a flat surface and good conductivity, thereby ensuring a stable connection with the first lead-out portion 12 of the heating element 10 and effectively reducing the risk of poor contact and resistance loss. Meanwhile, the wires 32 are responsible for transmitting electrical energy from the external circuit to the pads 31, and then through the pads 31 to the heating element 10, achieving efficient energy transmission.

[0066] It should be noted that the combination of pad 31 and wire 32 makes the electrical connection more flexible and facilitates installation and maintenance. In practical applications, the materials of pad 31 and wire 32 can be flexibly selected. Materials with high temperature resistance and corrosion resistance can be selected according to actual needs to further improve the durability and safety of heating element 100.

[0067] Optionally, the heating element 100 is provided with a conductive hole that passes through the first lead-out portion 12 and the second lead-out portion 22. A conductive layer is provided on the inner wall of the conductive hole, and the conductive layer at least covers the inner wall of the second lead-out portion 22. The pad 31 is electrically connected to the conductive layer and the first lead-out portion 12.

[0068] It should be noted that since the second lead-out portion 22 is part of the insulating component 20 and is not conductive, a conductive layer is provided inside the conductive hole, ensuring that the conductive layer at least covers the inner wall of the second lead-out portion 22. This achieves efficient electrical connection between the pad 31 and the first lead-out portion 12 and the second lead-out portion 22, further optimizing the electrical connection structure of the heating element 100. Specifically, the design of the conductive hole allows current to flow smoothly through the pad 31, the conductive layer, and the first lead-out portion 12, reducing resistance loss in the electrical connection path and improving the efficiency of power transmission.

[0069] In this embodiment, the conductive layer can be a metal conductive layer formed by plating copper, silver, tin, or other metals. In addition, the conductive layer can also be conductive adhesive or the like, as long as it satisfies the conductive function between the pad 31 and the first lead-out portion 12 and the second lead-out portion 22. This application does not make any specific limitations on this.

[0070] Optionally, among the plurality of insulating elements 20, the outermost insulating element 20 is the first insulating element 20, and the remaining insulating elements 20 are the second insulating elements 20; wherein, the first insulating element 20 includes an epoxy resin board 201, and the second insulating element 20 includes one or more of the following: epoxy resin board 201, thermally conductive silicone board 202, and mica board 203.

[0071] Among them, the epoxy resin board 201 has excellent insulation properties and mechanical strength. When used as the first insulating component 20 on the outermost side of the heating element 100, it can effectively prevent short circuits between the heating element 100 and the external environment and improve the overall structural strength of the heating element 100. At the same time, the epoxy resin board 201 also has a certain degree of heat resistance, which can maintain stable performance during heating. The second insulating component 20 can be flexibly selected from different materials or combinations of materials according to actual needs to achieve more optimized heat conduction and insulation effects. For example, the thermally conductive silicone board 202 has good thermal conductivity, which can more effectively transfer the heat generated by the heating core 10 to the battery pack 200, improving heating efficiency; the mica board 203, with its excellent high temperature resistance and insulation properties, provides additional safety for the heating element 100. The mica board 203 also has good heat insulation properties, thereby ensuring that the heat generated by the heating core 10 on both sides of the mica board 203 is evenly transferred away from the mica board 203. This differentiated design not only meets the specific needs of the heating element 100 in different locations, but also achieves the best balance between heat conduction, insulation performance and cost through the selection and combination of materials.

[0072] Specifically, in one embodiment of this application, such as Figures 1 to 5As shown, the heating element 100 is formed by a lamination process using a 5-layer structure, specifically: epoxy resin plate 201 + heating core 10 + epoxy resin plate 201 + heating core 10 + epoxy resin plate 201. The two heating cores 10 are each electrically connected to one of the two electrical connectors 30, and the two heating cores 10 are heated separately through two circuits to ensure that the battery packs 200 on both sides of the heating element 100 can simultaneously have high heating efficiency.

[0073] In another embodiment of this application, such as Figures 6 to 10 As shown, the heating element 100 is formed by a lamination process using a 5-layer structure, specifically: epoxy resin board 201 + heating core 10 + epoxy resin board 201 + heating core 10 + epoxy resin board 201. Two heating cores 10 are simultaneously electrically connected to an electrical connector 30, and both heating cores 10 are heated simultaneously through a single circuit. The two heating cores 10 are connected, allowing the heating element 100 to achieve high power density even when connected to only one circuit.

[0074] In another embodiment of this application, such as Figures 11 to 15 As shown, the heating element 100 is formed by a 9-layer lamination process, specifically: epoxy resin plate 201 + heating core 10 + thermally conductive silicone + heating core 10 + mica plate 203 + heating core 10 + thermally conductive silicone + heating core 10 + epoxy resin plate 201. The mica plate 203, located at the center of the heating element 100, provides excellent heat insulation. Two heating cores 10 are respectively arranged on both sides of the mica plate 203. The heat generated by the heating cores 10 on both sides of the mica plate 203 can be evenly conducted towards the battery pack 200 in the direction away from the mica plate 203. Simultaneously, the thermally conductive silicone placed between adjacent heating cores 10 not only insulates the two heating cores 10 but also enables rapid heat conduction, ensuring that the battery pack 200 on both sides of the heating element 100 can be heated evenly and quickly.

[0075] This application also discloses an electrical device, including the battery pack described above.

[0076] It should be noted that the electrical equipment provided in this application embodiment has the same or similar beneficial effects as the battery pack described above, and will not be repeated here.

[0077] In summary, the battery pack provided in this application embodiment has at least the following advantages:

[0078] In this embodiment, multiple battery packs are spaced apart along a first direction, and each battery pack includes multiple batteries arranged along a second direction. A heating element is positioned between adjacent battery packs to simultaneously heat multiple batteries in the battery packs on both sides of the heating element, improving the battery pack's performance under low-temperature conditions. Further, the heating element includes multiple spaced-apart insulating members and multiple heating cores. At least one heating core is sandwiched between adjacent insulating members, and the outermost two sides of the heating element are both insulating members. This not only prevents short circuits between heating cores and between heating cores and battery packs but also improves the overall strength of the heating element. All heating cores are electrically connected to electrical connectors, allowing simultaneous energization for heating. When multiple heating cores can generate heat together, a single heating core with lower power can be selected. This increases the power density of the heating element while reducing the risk of dry burning caused by excessively high power density in a single heating core, ensuring the heating element's safety performance. In this embodiment, the heating element is positioned between adjacent battery packs and can simultaneously heat two battery packs. By incorporating multiple heating cores within the heating element, the power density of the heating element is increased, ensuring its charging and safety performance, and ultimately improving the overall lifespan of the battery pack.

[0079] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0080] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A battery pack having intersecting first direction (x) and second direction (y), characterized in that, include: The system includes multiple battery packs (200) and a heating element (100). Each battery pack (200) comprises multiple batteries (2001) arranged along a second direction (y). The battery packs (200) are spaced apart along a first direction (x). The heating element (100) is connected between adjacent battery packs (200) and is used to heat adjacent battery packs (200). The heating element (100) includes a plurality of heating cores (10), a plurality of insulating elements (20), and an electrical connector (30); the plurality of insulating elements (20) are spaced apart along a first direction (x), and at least one heating core (10) is sandwiched between two adjacent insulating elements (20); the electrical connector (30) is electrically connected to the plurality of heating cores (10) respectively, and the first direction (x) is the thickness direction of the heating cores (10) and the insulating elements (20).

2. The battery pack according to claim 1, characterized in that, Multiple heating cores (10) are sandwiched between two adjacent insulating members (20), and the multiple heating cores (10) between two adjacent insulating members (20) are stacked along the first direction (x), or the multiple heating cores (10) between two adjacent insulating members (20) are continuously arranged along the second direction (y).

3. The battery pack according to claim 1, characterized in that, A heating core (10) is sandwiched between two adjacent insulating members (20), wherein the heating core (10) includes a heating part (11) and a first lead-out part (12) arranged along the second direction (y), the insulating member (20) includes a main body part (21) and a second lead-out part (22) arranged along the second direction (y), the battery pack (200), the main body part (21) and the heating part (11) are arranged opposite to each other along the first direction (x), the second lead-out part (22) and the first lead-out part (12) are arranged opposite to each other along the first direction (x), and are at least partially exposed to the adjacent battery pack (200), and the electrical connector (30) is electrically connected to the first lead-out part (12).

4. The battery pack according to claim 3, characterized in that, In a plurality of heating elements (10), the first lead-out portion (12) of some heating elements (10) is disposed on one side of the heating part (11) along the second direction (y), and the first lead-out portion (12) of the remaining heating elements (10) is disposed on the other side of the heating part (11) along the second direction (y); there are a plurality of electrical connectors (30), and the plurality of electrical connectors (30) are respectively electrically connected to the first lead-out portions (12) on both sides of the plurality of heating elements (10) along the second direction (y).

5. The battery pack according to claim 3, characterized in that, The first lead-out portion (12) of the plurality of heating elements (10) is disposed on the same side of the heating part (11) along the second direction (y), and the electrical connector (30) is electrically connected to the first lead-out portion (12) of the plurality of heating elements (10).

6. The battery pack according to claim 3, characterized in that, The electrical connector (30) is partially exposed at the second lead-out portion (22), and the heating element (100) further includes an insulating portion (40) that covers the portion of the electrical connector (30) exposed at the second lead-out portion (22).

7. The battery pack according to claim 3, characterized in that, The electrical connector (30) includes a pad (31) and a wire (32), wherein the wire (32) is electrically connected to the pad (31), the pad (31) is electrically connected to the first lead-out portion (12), the wire (32) is used to connect to an external circuit, and conducts electricity to the heating core (10) through the pad (31).

8. The battery pack according to claim 7, characterized in that, The heating element (100) is provided with a conductive hole that passes through the first lead-out portion (12) and the second lead-out portion (22). A conductive layer is provided on the inner wall of the conductive hole, and the conductive layer at least covers the inner wall of the second lead-out portion (22). The pad (31) is electrically connected to the conductive layer and the first lead-out portion (12).

9. The battery pack according to any one of claims 1 to 8, characterized in that, Of the plurality of insulating elements (20), the outermost insulating element (20) is the first insulating element, and the remaining insulating elements (20) are the second insulating elements; wherein, The first insulating component includes an epoxy resin board (201), and the second insulating component includes one or more of an epoxy resin board (201), a thermally conductive silicone board (202), and a mica board (203).

10. An electrical appliance, characterized in that, Includes the battery pack as described in any one of claims 1 to 9.

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