Heating assembly, battery system, and vehicle

Abstract

This invention provides a heating assembly, a battery system, and a vehicle. The heating assembly includes: a heating film having a heating area and a fire-resistant insulating area, the heating area and the fire-resistant insulating area being adjacent to each other along the height direction of the heating film; a fire-resistant insulating layer disposed in the fire-resistant insulating area and connected to the heating film; and a temperature-uniforming buffer layer disposed in the heating area and connected to the heating film. Compared to the prior art, the heating assembly of this embodiment utilizes the fire-resistant insulating layer and the temperature-uniforming buffer layer to achieve the functions of fire resistance, insulation, and uniform heat distribution, solving the problems of single function, insufficient heating uniformity, and inadequate safety of the heating film in the prior art.

Description

Technical Field

[0001] This utility model relates to the field of heating film technology, and more specifically, to a heating component, a battery system, and a vehicle. Background Technology

[0002] In the field of new energy vehicles, lithium-ion batteries are the primary choice for power batteries due to their high specific energy, good charge and discharge performance, and long cycle life. However, the performance of lithium-ion batteries degrades significantly at low temperatures. To ensure that the battery maintains a good operating temperature and performs optimally under various conditions, battery systems typically integrate heating functions.

[0003] In existing technologies, heating films are typically designed as independent heating units for direct heating of battery packs. However, traditional heating films only provide heating functionality without considering heating uniformity, which can easily lead to uneven battery heating. Furthermore, in the event of thermal runaway, electrolyte ejection from battery cells can easily affect other cells, posing significant safety hazards to the battery system.

[0004] No effective solution has yet been proposed to address the aforementioned technical issues. Utility Model Content

[0005] The main objective of this invention is to provide a heating component, a battery system, and a vehicle to address the problems of limited functionality, insufficient heating uniformity, and inadequate safety of existing heating films.

[0006] To achieve the above objectives, according to one aspect of the present invention, a heating assembly is provided, comprising: a heating film having a heating area and a fireproof insulating area, the heating area and the fireproof insulating area being arranged adjacent to each other along the height direction of the heating film; a fireproof insulating layer disposed in the fireproof insulating area and connected to the heating film; and a temperature equalization buffer layer disposed in the heating area and connected to the heating film.

[0007] Furthermore, the heating film has two working surfaces arranged opposite each other along the width direction of the heating film, wherein a fireproof insulation layer and a temperature equalization buffer layer are provided on both working surfaces.

[0008] Furthermore, the temperature-equalizing buffer layer is made of a temperature-equalizing thermally conductive buffer material, wherein the thermal conductivity of the temperature-equalizing thermally conductive buffer material is greater than or equal to 0.05 W / m·K.

[0009] Furthermore, the temperature-equalizing and thermally conductive buffer material includes at least one of graphite, graphene, and thermally conductive silicone, and / or the fireproof insulation layer is made of an insulating and fireproof material, which includes at least one of ceramic and mica.

[0010] Furthermore, the heating film includes a heating film body and two conductive sheets, with the conductive sheets of two adjacent heating components connected in series via a heating film busbar.

[0011] Furthermore, the thickness of the fireproof insulation layer is L1, the thickness of the temperature equalization buffer layer is L2, and the thickness of the conductive sheet is L3, wherein 0.3mm≤L1≤1mm, and / or 0.3mm≤L2≤1mm, 0.3mm≤L3≤1mm.

[0012] Furthermore, a heating film temperature detection element is provided on the heating film busbar.

[0013] According to another aspect of the present invention, a battery system is provided, the battery system including a heating component, the heating component being the heating component described above.

[0014] Furthermore, the battery system also includes a battery assembly, which includes multiple battery cells. The heating assembly is disposed facing the wide side of the battery cell, or facing the narrow side of the battery cell, or disposed at the bottom of the battery cell.

[0015] Furthermore, the battery system also includes a battery cell connection assembly, with the heating film busbar integrated with the battery cell connection assembly.

[0016] Furthermore, the battery cell connection assembly includes a flexible printed circuit board, wherein a heating film temperature detection element is integrated on the flexible printed circuit board, and the heating film temperature detection element is used to detect the temperature of the heating film busbar.

[0017] Furthermore, the battery cell includes a battery cell body and a terminal post arranged adjacent to each other along the height direction of the battery cell, and at least a portion of the fire-resistant insulation layer is arranged opposite to the battery cell body, with the fire-resistant insulation layer extending beyond the battery cell body to a height greater than the height of the terminal post.

[0018] According to another aspect of the present invention, a vehicle is provided, the vehicle having a battery system, the battery system being the aforementioned battery system.

[0019] By applying the technical solution of this utility model, a heating film is arranged in the battery system. The heating film can directly and rapidly heat the battery cells, enabling them to quickly reach a suitable operating temperature in low-temperature environments. Furthermore, in the event of thermal runaway in a battery cell, the fire-resistant insulating layer effectively isolates the ejected electrolyte, protecting surrounding cells from impact. Simultaneously, a temperature-equalizing buffer layer prevents localized overheating, improving heating efficiency and safety. Compared to existing technologies, the heating component in this embodiment utilizes a fire-resistant insulating layer and a temperature-equalizing buffer layer to achieve both fire resistance and insulation, as well as uniform heat distribution, solving the problems of limited functionality and insufficient heating uniformity and safety in existing heating films. Attached Figure Description

[0020] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0021] Figure 1 A schematic diagram of an embodiment of the heating assembly according to the present invention is shown;

[0022] Figure 2 A schematic diagram of the structure of a first embodiment of the battery system according to the present invention is shown;

[0023] Figure 3 A schematic diagram of the structure of a second embodiment of the battery system according to the present invention is shown;

[0024] Figure 4 It shows Figure 3 An enlarged schematic diagram of part A in the middle;

[0025] Figure 5 A schematic diagram of the structure of a third embodiment of the battery system according to the present invention is shown;

[0026] Figure 6 A schematic diagram of the structure of a fourth embodiment of the battery system according to the present invention is shown.

[0027] The above figures include the following reference numerals:

[0028] 1. Heating component; S1. Heating area; S2. Fireproof and insulated area;

[0029] 10. Heating film; 11. Heating film body; 12. Conductive sheet;

[0030] 20. Fireproof insulation layer;

[0031] 30. Temperature-neutralizing buffer layer;

[0032] 40. Heating film busbar;

[0033] 50. Heating film temperature detection element;

[0034] 60. Battery assembly; 61. Battery cell; 611. Battery cell body; 612. Terminal post;

[0035] 70. Battery cell connection assembly; 71. Flexible printed circuit board; 72. Tray; 73. Voltage sampling device; 74. Cell series busbar; 75. Cell temperature detection element;

[0036] 80. Battery housing. Detailed Implementation

[0037] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0038] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0039] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such terms can be used interchangeably where appropriate so that the embodiments of this application described herein can be implemented, for example, in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0040] Exemplary embodiments according to this application will now be described in more detail with reference to the accompanying drawings. However, these exemplary embodiments may be implemented in many different forms and should not be construed as being limited to the embodiments set forth herein. It should be understood that these embodiments are provided so that the disclosure of this application is thorough and complete, and that the concept of these exemplary embodiments is fully conveyed to those skilled in the art. In the drawings, for clarity, the thickness of layers and regions may be exaggerated, and the same reference numerals are used to denote the same devices, and therefore their description will be omitted.

[0041] Combination Figures 1 to 6 As shown, a heating component is provided according to a specific embodiment of this application.

[0042] The heating assembly includes a heating film 10, a fireproof insulation layer 20, and a temperature equalization buffer layer 30. The heating film 10 has a heating area and a fireproof insulation area, which are arranged adjacent to each other along the height direction of the heating film 10. The fireproof insulation layer 20 is disposed in the fireproof insulation area and connected to the heating film 10. The temperature equalization buffer layer 30 is disposed in the heating area and connected to the heating film 10.

[0043] By applying the technical solution of this embodiment, the heating film 10 is arranged in the battery system. The heating film 10 can directly and rapidly heat the battery cells, enabling them to quickly reach a suitable operating temperature in low-temperature environments. Furthermore, in the event of thermal runaway in the battery cell, the fire-resistant insulating layer 20 effectively isolates the ejected electrolyte, protecting surrounding cells from impact. Simultaneously, the temperature-equalizing buffer layer 30 prevents localized overheating, improving heating efficiency and safety. Compared to existing technologies, the heating assembly of this embodiment utilizes the fire-resistant insulating layer 20 and the temperature-equalizing buffer layer 30 to achieve fire resistance, insulation, and uniform heat distribution, solving the problems of limited functionality, insufficient heating uniformity, and inadequate safety in existing heating films.

[0044] like Figure 1 As shown, the H direction is the height direction of the heating film 10, the L direction is the length direction of the heating film 10, and the W direction is the width direction (or thickness direction) of the heating film 10.

[0045] Furthermore, the heating film 10 has two working surfaces arranged opposite each other along the width direction of the heating film 10, wherein a fire-resistant insulating layer 20 and a temperature-equalizing buffer layer 30 are provided on both working surfaces. By providing a fire-resistant insulating layer 20 and a temperature-equalizing buffer layer 30 on both working surfaces of the heating film 10, double-sided heating can be achieved in the battery system, accelerating the heating speed of the battery cells, shortening the preheating time of the battery system under low temperature conditions, improving the vehicle's starting performance and driving range, while enhancing the fire-resistant and insulating effect.

[0046] Preferably, the fire-resistant insulation layer 20 is bonded to the heating film 10. This bonding method enhances the contact and stability between the fire-resistant insulation layer 20 and the heating film 10, reduces air gaps, and allows the fire-resistant insulation layer 20 to more tightly isolate the battery cell, preventing chain reactions caused by electrolyte eruption.

[0047] Preferably, the temperature equalization buffer layer 30 is bonded to the heating film 10. This bonding method enhances the contact and stability between the temperature equalization buffer layer 30 and the heating film 10, reduces air gaps, and improves heat transfer efficiency.

[0048] It should be understood that, in practical applications, the fireproof insulation layer 20 and the temperature equalization buffer layer 30 can also be applied to the heating film 10 by means of coating or other methods.

[0049] Furthermore, the temperature-equalizing buffer layer 30 is made of a temperature-equalizing thermally conductive buffer material, wherein the thermal conductivity of the temperature-equalizing thermally conductive buffer material is greater than or equal to 0.05 W / m·K. Using a material with a high thermal conductivity can improve the heat conduction efficiency of the heating component, ensure uniform heat distribution, reduce the temperature difference on the surface of the cell during the heating process, avoid local overheating, and improve the overall performance and safety of the battery system.

[0050] The temperature-equalizing and thermally conductive buffer material includes at least one of graphite, graphene, and thermally conductive silicone. Graphite and graphene have excellent thermal conductivity, while thermally conductive silicone maintains thermal conductivity while also possessing a certain degree of elasticity, allowing it to adapt to the expansion and contraction of the battery cell. Using graphite, graphene, thermally conductive silicone, etc., to fabricate the temperature-equalizing buffer layer 30 enables the heating component to heat the battery cell efficiently and uniformly.

[0051] The fire-resistant insulation layer 20 is made of insulating and fire-resistant materials, including at least one of ceramics and mica. Ceramics and mica possess excellent insulating and fire-resistant properties, providing reliable isolation in the event of thermal runaway of the battery cell, and offering effective fire-resistant insulation protection.

[0052] Furthermore, the heating film 10 includes a heating film body 11 and two conductive sheets 12. The conductive sheets 12 of two adjacent heating components are connected in series through a heating film busbar 40. Through the connection of the conductive sheets 12 and the heating film busbar 40, the heating components can be connected in series to form a unified heating network. The heating components can heat multiple cells through fewer current input and output ports, simplifying the electrical connection of the battery system and improving the packing efficiency and space utilization.

[0053] Specifically, the thickness of the fire-resistant insulation layer 20 is L1, where 0.3mm ≤ L1 ≤ 1mm. By controlling the thickness of the fire-resistant insulation layer 20, the performance and cost of the heating component can be balanced, and the heating component can achieve lightweighting and miniaturization while meeting the functions of heating, fire resistance and insulation.

[0054] Specifically, the thickness of the temperature equalization buffer layer 30 is L2, where 0.3mm ≤ L2 ≤ 1mm. By controlling the thickness of the temperature equalization buffer layer 30, the heating component can be made lightweight and miniaturized while still meeting the heating function requirements.

[0055] Specifically, the thickness of the conductive sheet 12 is L3, where 0.3mm ≤ L3 ≤ 1mm. By controlling the thickness of the conductive sheet 12, the heating component can be made lightweight and miniaturized while still meeting the heating function requirements.

[0056] Preferably, the heating film busbar 40 is laser-welded to the conductive sheet 12. Utilizing the high precision and efficiency of laser welding, reliable connections between heating components can be achieved, while reducing thermal damage during the welding process. This results in a more stable series structure of the heating components, more reliable electrical connections, and a lower failure rate due to poor connections.

[0057] In this embodiment, the conductive sheet 12 is typically a flat structure to facilitate welding.

[0058] Furthermore, a heating film temperature detection element 50 is provided on the heating film busbar 40. Through the integrated heating film temperature detection element 50, the temperature status of the heating component can be monitored in real time, ensuring the safety and controllability of the heating process. The heating power can be dynamically adjusted according to the actual temperature of the heating film 10 to avoid overheating or underheating, thereby improving the intelligence level and safety of the heating component.

[0059] Combination Figures 2 to 6 As shown, according to another specific embodiment of this application, a battery system is provided, the battery system including a heating component, the heating component being the heating component in the above embodiment.

[0060] By incorporating heating elements into battery systems and optimizing their design, the starting performance and driving range in low-temperature environments can be improved, while also enhancing the safety and reliability of the battery system. These battery systems can be applied to various types of electric vehicles, electric motorcycles, energy storage systems, and more.

[0061] Specifically, the battery system also includes a battery assembly 60, which includes multiple battery cells 61. Optionally, the heating assembly is positioned facing the wide side of the battery cell 61, or facing the narrow side of the battery cell 61, or positioned at the bottom of the battery cell 61. Based on the shape of the battery cell 61 and the structure of the battery system, the most suitable arrangement of the heating assembly can be selected to achieve the best heating effect, improve heating efficiency, and enhance the overall performance of the battery system.

[0062] When the heating components are positioned facing the wide side of the battery cell 61, at least one heating component is placed between every two adjacent battery cells 61, enabling rapid heating of the battery cell 61. When the heating components are positioned facing the narrow side of the battery cell 61, multiple battery cells 61 can correspond to one heating component, reducing the number of heating components required. The heating components can be placed on the side of the battery assembly 60, or, if the battery cells 61 are arranged in multiple rows, a heating component can be placed on the side of each row of battery cells 61. When the heating components are located at the bottom of the battery cell 61, a large heating component can be used to heat the entire battery assembly, or multiple heating components can be laid out at the bottom of the battery assembly. It should be noted that when the heating components are positioned facing the wide or narrow side of the battery cell 61, the height direction of the heating film 10 is parallel to the height direction of the battery cell 61. When the heating components are located at the bottom of the battery cell 61, the thickness direction of the heating film 10 is parallel to the height direction of the battery cell 61.

[0063] It should be understood that, in practical applications, heating components can be arranged simultaneously on the wide side, narrow side, and bottom of the cell 61, or heating components can be arranged at any two locations simultaneously, in order to achieve higher battery heating efficiency.

[0064] In one exemplary embodiment of this application, the battery system further includes a battery housing 80, a battery assembly 60 located inside the battery housing 80, a plurality of battery cells 61 stacked along the narrow face direction of the battery cells to form a battery cell group, a plurality of battery cell groups spaced apart along the wide face direction of the battery cells, a heating assembly disposed between adjacent battery cell groups, and a heating assembly disposed between the battery cell group located at the edge and the side wall of the battery housing 80.

[0065] Furthermore, the battery system also includes a battery cell connection assembly 70, with the heating film busbar 40 integrated with the battery cell connection assembly 70. By integrating the heating film busbar 40 with the battery cell connection assembly 70, the electrical connection structure of the battery system can be simplified, assembly efficiency and space utilization can be improved, production costs can be reduced, and the overall performance of the battery system can be improved.

[0066] The battery cell connection assembly 70 includes a flexible printed circuit board 71, on which a heating film temperature detection element 50 is integrated. The heating film temperature detection element 50 is used to detect the temperature of the heating film busbar 40. By integrating the heating film temperature detection element 50 onto the flexible printed circuit board 71, real-time monitoring and feedback of the heating component temperature can be achieved, improving the intelligence level of the battery system. The battery system can automatically adjust the heating power according to the temperature state of the heating film 10, avoiding overheating or underheating, and improving the safety and reliability of the battery system.

[0067] In one exemplary embodiment of this application, such as Figure 2 and Figure 4 As shown, the battery cell connection assembly 70 also includes a tray 72, a voltage sampling element 73, a cell series bus 74, and a cell temperature detection element 75. The heating film bus 40 and the cell series bus 74 are both integrated on the tray 72. The cell temperature detection element 75 is used to detect the cell temperature, and the voltage sampling element 73 is used to collect the cell voltage.

[0068] Preferably, the battery cell 61 includes a cell body 611 and an electrode post 612 disposed adjacent to each other along the height direction of the cell 61. At least a portion of the fire-resistant insulating layer 20 is disposed opposite to the cell body 611, and the height of the fire-resistant insulating layer 20 extending outside the cell body 611 is greater than the height of the electrode post 612. Through the size arrangement of the fire-resistant insulating layer 20, not only is the cell body 611 protected, but the electrode post 612 is also isolated, preventing the impact of electrolyte ejection on the electrical connection during thermal runaway, providing comprehensive fire-resistant insulation protection, and improving the overall safety of the battery system.

[0069] This application also provides a preferred embodiment of a battery system.

[0070] The existing battery systems are described below: With the rapid development of new energy vehicles, lithium-ion batteries have become the main choice for power batteries due to their high specific energy, good charge and discharge performance, and long cycle life. However, the performance of lithium-ion batteries is greatly reduced at low temperatures. To ensure the battery operates at a good temperature and achieves optimal performance, many automotive battery manufacturers add heating functions to their battery systems. Usually, cooling and heating functions are achieved simultaneously through liquid cooling systems. However, the heating rate of pure liquid cooling solutions is low. Therefore, there are also solutions that add heating films to the liquid cooling system. However, the current heating film solutions are basically connected in series by wire harnesses. The wire harness connectors take up a lot of space and have a single function. They have no advantage in CTP (Cell to Pack) solutions where the requirements for battery module integration are becoming increasingly high.

[0071] like Figure 5 As shown, the battery system includes a battery cell 61 and a heating assembly 1 disposed on the narrow side of the battery cell, as... Figure 1 As shown, the heating component 1 includes a heating film 10, which has a heating area S1 and a fireproof and insulating area S2. The heating area S1 is provided with a temperature-equalizing buffer material, such as thermally conductive silicone or composite graphite film, while the fireproof and insulating area S2 is provided with a fireproof material, such as ceramic tape or mica. The heating film 10 has a current input port and a current output port, both of which are configured as conductive sheets. These conductive sheets can be nickel sheets, copper sheets, or other metal sheets with good conductivity.

[0072] Specifically, such as Figure 6 As shown, the fireproof insulation area S2 starts from the shoulder of the battery cell or 2-5mm below the shoulder and extends above the battery cell terminal. Fireproof insulation material is pasted in the fireproof insulation area, with a thickness of 0.3-1mm. This serves to isolate the ejected electrolyte after thermal runaway of the battery cell. The heating area S1 is pasted with a temperature-equalizing and thermally conductive buffer material, with a thickness of 0.3-1mm. This serves to equalize the temperature, prevent dry burning, and ensure the temperature of the battery cell. Even when the heating film 10 is not turned on, the temperature equalization function will still ensure the temperature equalization of the battery cells in the middle and at both ends of the battery pack. It can also serve as a pre-tightening structure for assembly. The thermal conductivity of the temperature-equalizing and thermally conductive buffer material is greater than or equal to 0.05W / m·k. Graphite or graphene, or other materials with ultra-high thermal conductivity, are preferred.

[0073] Preferably, the upper part of the heating film 10 is covered with fireproof and insulating tape, which serves as a fireproof and insulating barrier against the spraying of electrolyte after thermal runaway at the top of the battery cell; the large surface of the heating film 10 is covered with a temperature-equalizing buffer material with a certain structural strength, which reduces the temperature difference on the surface of the heating film 10 and prevents dry burning. The buffer function can also pre-tighten the assembly between battery cell groups.

[0074] like Figure 2As shown, the input and output ports of the heating film 10 integrate nickel or copper sheets, typically 0.1–0.3 mm thick. These sheets can be connected in series with the heating film busbar 40 using laser welding. They can also be welded to the battery cell's series busbar simultaneously at the same station using the same equipment. The heating film busbar 40 can be integrated onto the existing CCS (Cell Connection System) structure on top of the battery cell. Specifically, the CCS component structure is as follows: Figure 3 and Figure 4 As shown, the heating component 1 is integrated into the battery system in the following manner: Figure 5 As shown.

[0075] In existing heating components, the heating film has a single function, is connected in series with wire harnesses, and lacks temperature monitoring or an independent wire harness for temperature sensing. Compared to existing heating components, the heating component 1 in this embodiment features an innovative structure, making the heating film 10 not just a single heating element, but simultaneously serving as a structure, fireproof insulation, and heating function. The series connection method of the heating film 10 in the battery pack is also innovative, using laser welding, and the series bus (i.e., the heating film bus 40) is integrated into the existing CCS structure, saving space and wire harness costs. The temperature sensing sampling at the series connection point of the heating film 10 can be integrated into the existing FPC (Flexible Printed Circuit) structure, offering advantages in space and cost.

[0076] Alternatively, a CCS-free solution can be adopted, in which the heating film busbar 40 is arranged as a separate component on the top of the cell, and the heating component 1 is placed on the large surface of the cell in the same series manner. Or, the liquid cooling plate is arranged on the side of the cell, and the heating component 1 is arranged on the bottom surface of the cell, with the heating component 1 connected in series with separate busbars at the end plates on both sides.

[0077] In this embodiment, the heating component 1 integrates the heating film 10 into the original narrow-face insulation sheet position of the whole package, which can simultaneously undertake the functions of structure, fireproof insulation and heating. The series connection scheme of the heating film 10 wire harness connector is changed to the series connection by nickel sheet welding. The heating film series bar is integrated into the existing CCS structure, which can save the series wire harness and the docking connector, improve the efficiency of the whole package assembly and reduce the cost.

[0078] According to another specific embodiment of this application, a vehicle is provided, the vehicle having a battery system, the battery system being the battery system in the above embodiment.

[0079] By integrating a battery system with efficient heating, fireproof insulation, and temperature monitoring functions into the vehicle, the vehicle's performance and safety in low-temperature environments can be improved. The vehicle's starting performance and driving range in cold regions are significantly improved, while the overall safety and reliability of the vehicle are also enhanced.

[0080] Alternatively, the vehicle can be any type of new energy vehicle, such as an electric vehicle, a hybrid vehicle, or an electric bus.

[0081] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0082] In addition to the above, it should be noted that the terms "one embodiment," "another embodiment," and "embodiment" used in this specification refer to specific features, structures, or characteristics described in connection with that embodiment, which are included in at least one embodiment described in the general description of this application. The appearance of the same expression in multiple places in the specification does not necessarily refer to the same embodiment. Furthermore, when a specific feature, structure, or characteristic is described in connection with any embodiment, the intention is to suggest that implementing such a feature, structure, or characteristic in conjunction with other embodiments also falls within the scope of this utility model.

[0083] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0084] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A heating assembly, characterized by, include: A heating film (10) has a heating area and a fireproof and insulating area, wherein the heating area and the fireproof and insulating area are arranged adjacent to each other along the height direction of the heating film (10); A fireproof insulation layer (20) is disposed in the fireproof insulation area and connected to the heating film (10); A uniform temperature buffer layer (30) is disposed in the heating area and connected to the heating film (10).

2. The heating assembly of claim 1, wherein, The heating film (10) has two working surfaces that are arranged opposite to each other along the width direction of the heating film (10), wherein the fireproof insulation layer (20) and the temperature equalization buffer layer (30) are provided on both working surfaces.

3. The heating assembly of claim 1, wherein, The uniform temperature buffer layer (30) is made of a uniform temperature thermally conductive buffer material, wherein the thermal conductivity of the uniform temperature thermally conductive buffer material is greater than or equal to 0.05 W / m·k.

4. The heating assembly of claim 3, wherein, The uniform temperature thermally conductive buffer material includes at least one of graphite, graphene, and thermally conductive silicone, and / or the fireproof insulation layer (20) is made of an insulating fireproof material, which includes at least one of ceramic and mica.

5. The heating assembly of any one of claims 1-4, wherein, The heating film (10) includes a heating film body (11) and two conductive sheets (12), and the conductive sheets (12) of two adjacent heating components are connected in series through a heating film busbar (40).

6. The heating assembly of claim 5, wherein, The thickness of the fireproof insulation layer (20) is L1, the thickness of the temperature equalization buffer layer (30) is L2, and the thickness of the conductive sheet (12) is L3, wherein 0.3mm≤L1≤1mm, and / or 0.3mm≤L2≤1mm, 0.3mm≤L3≤1mm.

7. The heating assembly of claim 5, wherein, The heating film busbar (40) is provided with a heating film temperature detection element (50).

8. A battery system characterized by, The battery system includes a heating component, which is the heating component according to any one of claims 1-7.

9. The battery system of claim 8, wherein, The battery system further includes a battery assembly (60), which includes a plurality of cells (61). The heating assembly is disposed toward the wide side of the cell (61), or the heating assembly is disposed toward the narrow side of the cell (61), or the heating assembly is disposed at the bottom of the cell (61).

10. The battery system of claim 8, wherein, The battery system also includes a battery cell connection assembly (70), and a heating film busbar (40) is integrated with the battery cell connection assembly (70).

11. The battery system of claim 10, wherein, The battery cell connection assembly (70) includes a flexible printed circuit board (71), wherein a heating film temperature detection element (50) is integrated on the flexible printed circuit board (71), and the heating film temperature detection element (50) is used to detect the temperature of the heating film busbar (40).

12. The battery system of claim 9, wherein, The battery cell (61) includes a battery cell body (611) and a terminal post (612) arranged adjacent to each other along the height direction of the battery cell (61). At least a portion of the fireproof insulation layer (20) is arranged opposite to the battery cell body (611), and the fireproof insulation layer (20) extends beyond the battery cell body (611) to a height greater than the height of the terminal post (612).

13. A vehicle characterized by comprising: The vehicle has a battery system, the battery system being the battery system of any one of claims 8 to 12.

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