Battery pack and electric device

Abstract

The utility model relates to new energy automobile manufacturing technical field discloses a kind of battery pack and electric equipment, comprising: box, battery pack and heat management component;Battery pack is located in box, and battery pack includes multiple monomer batteries arranged along first direction, and monomer battery includes first side and second side connected adjacent along first direction;Heat management component is located in box, and battery pack is located at at least one side of heat management component in second direction, and heat management component includes multiple first heat management and multiple second heat management, and multiple first heat management and multiple second heat management are alternately arranged along first direction;Every first side is connected with every first heat management, and every second side is connected with every second heat management.The utility model can guarantee the heat management in battery while improving the energy density of battery, to improve the overall performance of battery.

Description

Technical Field

[0001] This utility model relates to the field of new energy vehicle manufacturing technology, and in particular to a battery pack and electrical equipment. Background Technology

[0002] The rapid development of the new energy vehicle sector has placed higher demands on the energy density and safety of battery packs. In actual use, the battery cells generate a significant amount of heat during charging and discharging. If this heat cannot be effectively and quickly dissipated, the cell temperature will become excessively high, affecting battery performance and lifespan, and potentially even causing thermal runaway and resulting in fires or other safety incidents.

[0003] Traditional battery thermal management solutions typically employ methods such as liquid cooling plates, which can only dissipate heat from one side of the battery cell. This results in limited heat dissipation area and insufficient efficiency, making it difficult to effectively address the thermal management needs of batteries under high-rate charging and discharging or extreme environments. This poses risks such as localized hot spots, heat accumulation, and even thermal runaway. Utility Model Content

[0004] The purpose of this invention is to design a battery pack that can effectively, quickly, and multi-sidedly dissipate heat from the battery cells.

[0005] To achieve the above objectives, this utility model provides a battery pack having a first direction and a second direction that are perpendicular to each other, including: Box, A battery pack is located inside the housing. The battery pack includes a plurality of individual cells arranged along a first direction. Each individual cell includes a first side and a second side that are adjacent to each other along the first direction. A thermal management component is located inside the housing, and the battery pack is located on at least one side of the thermal management component in the second direction. The thermal management component includes a plurality of first thermal management parts and a plurality of second thermal management parts, which are alternately arranged along the first direction. Each first side is connected to each first thermal management part, and each second side is connected to each second thermal management part.

[0006] Furthermore, the battery pack also includes an insulating layer, a portion of which is disposed on the side of the first thermal management section near the first side; another portion of which is disposed on the side of the second thermal management section near the second side.

[0007] Furthermore, the battery pack also has a third direction that is mutually perpendicular to both the first and second directions, and the housing includes a frame and a bottom wall connected along the third direction, with both the first thermal management unit and the second thermal management unit bonded to the bottom wall.

[0008] Furthermore, the battery pack also has a third direction that is perpendicular to both the first and second directions. The individual battery also includes a top surface and a bottom surface, a terminal post and a pressure relief valve that are disposed opposite to each other along the third direction. The bottom surface is connected to the bottom wall, the terminal post is disposed on the top surface and the pressure relief valve is disposed on the bottom surface.

[0009] Furthermore, the first thermal management unit and the second thermal management unit that are adjacent to each other along the first direction are both arranged at an angle to the first direction, and the included angle formed between the adjacent first thermal management unit and the second thermal management unit is an obtuse angle.

[0010] Furthermore, the first thermal management unit is bonded to the first side surface, and the second thermal management unit is bonded to the second side surface.

[0011] Furthermore, the first thermal management section is provided with a first flow channel, and the second thermal management section is provided with a second flow channel. The first flow channel and the second flow channel are connected to form a cooling flow channel for introducing coolant, and the cooling flow channel extends along the first direction.

[0012] Furthermore, the single cell also includes a third side connected to the second side along the first direction; the thermal management component also includes a plurality of third thermal management units, which are connected to a plurality of second thermal management units one by one, and the plurality of third thermal management units are spaced apart from the plurality of first thermal management units along the first direction, and the plurality of third side is connected to a plurality of third thermal management units one by one.

[0013] Furthermore, the surface of the second thermal management unit is parallel to the first direction, and both the first thermal management unit and the third thermal management unit are set at an angle to the first direction, forming a 120° angle between the first thermal management unit and the second thermal management unit, and forming a 120° angle between the third thermal management unit and the second thermal management unit.

[0014] This utility model also provides an electrical device, including the aforementioned battery pack.

[0015] Compared with the prior art, the battery pack and electrical device of this utility model have the following advantages: The battery pack and electrical device of this utility model, through the design of a multi-sided thermal management structure, wherein the thermal management component has multiple alternating first thermal management sections and second thermal management sections, forming a heat dissipation unit that is connected to multiple different sides of the individual battery cells, overcomes the shortcomings of traditional single-sided heat dissipation, such as low efficiency and easy generation of local hot spots. This achieves efficient and uniform cell heat dissipation, improves battery pack safety, and reduces the risk of thermal runaway. Furthermore, by only setting up the thermal management component, without the need for additional side plates, end plates, or beams, the energy density of the battery pack can be increased. Attached Figure Description

[0016] Figure 1 This is an isometric view of the battery pack and thermal management components according to the first embodiment of this utility model; Figure 2 This is an exploded view of the battery pack and thermal management components according to the first embodiment of this utility model; Figure 3 This is a top view of the battery pack and thermal management components according to the first embodiment of this utility model; Figure 4 This is an isometric view of the battery pack and thermal management components according to the second embodiment of this utility model; Figure 5 This is an isometric view of the battery pack and thermal management components according to the third embodiment of this utility model; Figure 6 This is an exploded view of the battery pack and thermal management components according to the third embodiment of this utility model; Figure 7 This is a schematic diagram of the periodic sequence of the battery pack and thermal management components according to the first embodiment of this utility model. Figure 1 ; Figure 8 This is a schematic diagram of the periodic sequence of the battery pack and thermal management components in the first embodiment of this utility model. Figure 2 ; Figure 9 This is an isometric view of a single battery cell according to an embodiment of this utility model; Figure 10 This is the isometric view of the battery pack in the first embodiment of this utility model. Figure 1 ; Figure 11 This is the isometric view of the battery pack in the first embodiment of this utility model. Figure 2 ; Figure 12 This is an isometric view of the battery pack according to the second embodiment of this utility model.

[0017] In the diagram, 1 is the battery pack; 11 is the individual battery cell; 111 is the casing; 112 is the tab; 113 is the pressure relief valve; 114 is the first side surface; 115 is the second side surface; 116 is the third side surface; 117 is the top surface; and 118 is the bottom surface. 2. Thermal management components; 21. Cooling channels; 23. Insulating layer components; 24. First thermal management section; 25. Second thermal management section; 26. Third thermal management section; 3. Box body; 31. Frame body; 32. Bottom wall. Detailed Implementation

[0018] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0019] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" used to indicate the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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. Therefore, they should not be construed as limitations on this utility model.

[0020] In the description of this utility model, it should be understood that the terms "connected," "linked," and "fixed," etc., used in this utility model should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or a welded connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly defined. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0021] In this invention, terms such as "first" and "second" are used to describe various types of information, but this information should not be limited to these terms. These terms are only used to distinguish information of the same type from each other. For example, without departing from the scope of this invention, "first" information can also be referred to as "second" information, and similarly, "second" information can also be referred to as "first" information.

[0022] In the description of this utility model, it should be understood that any two of the first direction X, the second direction Y, and the third direction Z described in this utility model are perpendicular or approximately perpendicular to each other.

[0023] like Figure 1 , Figure 2 and Figure 10 As shown in the preferred embodiment of this utility model, the battery pack has a first direction X and a second direction Y that are perpendicular to each other. In practical applications, the first direction X usually refers to the length direction of the battery pack, and the second direction Y refers to the width direction of the battery pack.

[0024] The battery pack mainly includes: housing 3, battery pack 1, and thermal management components 2.

[0025] The housing 3 serves as the outer shell of the battery pack, providing protection and support for the internal components. The interior of the housing 3 has storage space for housing the battery pack 1 and the thermal management components 2.

[0026] Battery pack 1, located within housing 3, is the core energy storage unit of the battery pack. Battery pack 1 includes multiple individual cells 11 arranged along a first direction X. These individual cells 11 can be square or polygonal, etc., depending on the application requirements. Each individual cell 11 includes a first side 114 and a second side 115 connected adjacent to each other along the first direction X. These two sides serve as its main heat-generating and heat-dissipating surfaces.

[0027] The thermal management component 2 is also located inside the housing 3 and is fixedly connected to the housing 3 to ensure the stability and reliability of the thermal management component 2 inside the battery pack. The battery pack 1 is located on at least one side of the thermal management component 2 in the second direction Y, that is, the thermal management component 2 can be arranged on one or both sides of the battery pack 1 to provide a more flexible heat dissipation configuration.

[0028] The thermal management component 2 includes a plurality of first thermal management sections 24 and a plurality of second thermal management sections 25. These first thermal management sections 24 and second thermal management sections 25 are alternately arranged along a first direction X to form an alternating arrangement structure, so that the thermal management component 2 can effectively make thermal contact with the plurality of individual battery cells 11.

[0029] In order to achieve heat dissipation from multiple sides of the single cell 11, each first side 114 is connected to each first thermal management unit 24, and each second side 115 is connected to each second thermal management unit 25. This allows heat to be efficiently conducted from multiple heat-generating sides of the single cell 11 to the thermal management unit 2, greatly increasing the heat exchange area and significantly improving the heat dissipation efficiency.

[0030] In some improvements of this application, the battery pack further includes an insulating layer 23. A portion of the insulating layer 23 is disposed on the side of the first thermal management section 24 near the first side 114; another portion of the insulating layer 23 is disposed on the side of the second thermal management section 25 near the second side 115. The insulating layer 23 can effectively isolate the thermal management section from the individual battery cells 11, preventing current or voltage leakage and reducing the risk of short circuits. At the same time, the insulating layer 23 can also prevent electrochemical reactions between the electrolyte and the material of the thermal management component 2, thereby avoiding corrosion and extending the service life of the thermal management component 2.

[0031] refer to Figure 11In some improvements of this application, the battery pack also has a third direction Z that is mutually perpendicular to both the first direction X and the second direction Y. The housing 3 includes a frame 31 and a bottom wall 32 connected along the third direction Z. The first thermal management unit 24 and the second thermal management unit 25 are both bonded to the bottom wall 32. By using an adhesive method to fix the thermal management components 2 to the bottom wall 32 of the housing 3, the overall structural stability of the thermal management components 2 can be enhanced. The bottom wall 32 can also be used as an auxiliary heat dissipation surface to conduct heat from the thermal management components 2 to the housing 3, assisting in overall heat dissipation, and also simplifying the assembly process.

[0032] refer to Figure 9 In some improvements of this application, the battery pack also has a third direction Z that is mutually perpendicular to the first direction X and the second direction Y. The individual battery 11 also includes a top surface 117 and a bottom surface 118, a terminal post and a pressure relief valve 113 that are arranged opposite each other along the third direction Z. The bottom surface 118 is connected to the bottom wall 32. The terminal post is located on the top surface 117 and is used for electrical connection of the individual battery 11. The pressure relief valve 113 is located on the bottom surface 118 and can release pressure through a preset path when the internal pressure of the individual battery 11 rises abnormally, so as to avoid danger to the battery pack and further improve the passive safety performance of the battery pack.

[0033] In some improvements of this application, the first thermal management part 24 is bonded to the first side 114, and the second thermal management part 25 is bonded to the second side 115, so as to ensure that a tight and continuous thermal contact interface is formed between the thermal management component 2 and the battery cell, reduce contact thermal resistance, and ensure efficient heat conduction from the battery cell to the thermal management component 2.

[0034] refer to Figure 3 In some improvements of this application, the first thermal management section 24 and the second thermal management section 25 adjacent to each other along the first direction X are both set at an angle to the first direction X. The included angle A formed between the adjacent first thermal management section 24 and the second thermal management section 25 is an obtuse angle, which is 120° or approximately 120°. By optimizing the structure of the thermal management component 2 to optimize the contact surface between the cell and the thermal management component 2, and when the first side 114 is attached to the first thermal management section 24 and the second side 115 is attached to the second thermal management section 25, the interior angle formed between the first side 114 and the second side 115 of the single cell 11 is complementary to the included angle A, which is 60°. This angle setting can achieve a compact arrangement of the single cell 11 inside the battery pack, maximize the use of internal space, and improve the energy density of the battery pack.

[0035] In some improvements of this application, a first thermal management section 24 has a first flow channel, and a second thermal management section 25 has a second flow channel. The first and second flow channels are connected to form a cooling flow channel 21 for introducing coolant. The cooling flow channel 21 extends along a first direction X. The flow channel is used to contain coolant to regulate the temperature of the individual battery cells 11. The coolant can be water, ethylene glycol mixture, etc., and circulates in the cooling flow channel 21 to remove the heat generated by the individual battery cells 11, thereby achieving active and efficient liquid cooling. The design of the cooling flow channel 21 extending along the first direction X helps the coolant to flow and dissipate heat evenly along the entire length of the battery pack 1.

[0036] refer to Figure 4 In some improvements of this application, to meet higher heat dissipation requirements or further improve heat dissipation uniformity, the single cell 11 also includes a third side 116 connected to the second side 115 along the first direction X. Simultaneously, the thermal management component 2 also includes multiple third thermal management sections 26, each connected to a multiple second thermal management section 25, and spaced sequentially from a multiple first thermal management section 24 along the first direction X. Correspondingly, the multiple third side 116 is connected to the multiple third thermal management sections 26. This design allows the thermal management component 2 located on one side of the battery pack 1 to cover three sides of the single cell 11, further increasing the heat dissipation area and achieving three-dimensional heat dissipation of the cell, greatly improving heat dissipation effect and efficiency.

[0037] refer to Figure 5 and Figure 6 In some specific embodiments of this application, the thermal management component 2 further includes a fourth thermal management unit connecting the third thermal management unit 26 and the first thermal management unit 24. The thermal management component 2 has a battery pack 1 (defined as the first battery pack 1) on one side along the second direction Y, and a second battery pack 1 on the other side. Individual cells 11 in both the first and second battery packs 1 are spaced apart, and the projection of each individual cell 11 onto the third direction Z is a regular hexagon. The first side 114 of the individual cell 11 in the first battery pack 1 is connected to the first thermal management unit 24, the second side 115 is connected to the second thermal management unit 25, and the third side 116 is connected to the third thermal management unit 26. The three connected sides of the individual cell 11 in the second battery pack 1 are sequentially connected to the third thermal management unit 26, the fourth thermal management unit, and the first thermal management unit 24. This design improves the utilization rate of the thermal management component 2 while also increasing the density of the individual cells 11.

[0038] refer to Figure 12 Based on the above specific embodiments, the thermal management component 2 and the first battery pack 1 and the second battery pack 1 located on both sides of it are defined as a battery pack 1, and multiple battery pack 1s are arranged sequentially in the housing 3 along the second direction Y.

[0039] In some improvements of this application, the surface of the second thermal management unit 25 is parallel to the first direction X, and both the first thermal management unit 24 and the third thermal management unit 26 are set at an angle to the first direction X. The first thermal management unit 24 and the second thermal management unit 25 form a 120° angle, and the third thermal management unit 26 and the second thermal management unit 25 also form a 120° angle. This angle setting further optimizes the compactness of the battery pack 1 and the distribution of the cooling fluid, allowing the first thermal management unit 24, the second thermal management unit 25, and the third thermal management unit 26 to fit tightly and completely against the side of the individual battery cell 11. This ensures that the coolant in the cooling channel 21 flows evenly and efficiently through each individual battery cell 11, thereby achieving efficient management of the battery temperature.

[0040] This invention also provides an electrical device including the aforementioned battery pack. This device can be widely used in electric vehicles, hybrid vehicles, energy storage power stations, power tools, drones, and other fields with high requirements for battery pack energy density, cycle life, and safety. The battery pack of this invention ensures stable and reliable operation of the electrical device under various working conditions, while extending its service life.

[0041] Example: This example is an electric vehicle power battery pack that uses a regular hexagonal prism battery and a zigzag thermal management component 2.

[0042] Battery Pack 1: 11 groups are arranged along the first direction X, with 10 cells in each group, for a total of 110 individual cells 11. Each individual cell 11 is a regular hexagon in cross-section along the third direction Z, making it a regular hexagonal prism. Compared to cylindrical cells, this regular hexagonal prism cell has higher stacking efficiency in the same volume, can accommodate more battery capacity, and improves the energy density of the battery pack.

[0043] Thermal management component 2 extends along the first direction X in a zigzag structure, with an insulating layer 23 attached to its surface, and is capable of encasing multiple adjacent hexagonal prism battery cells. Thermal management component 2 consists of multiple alternately connected first thermal management sections 24 and second thermal management sections 25. The zigzag design allows thermal management component 2 to achieve a high degree of fit with at least two sidewalls of each hexagonal prism battery cell, namely the first sidewall 114 and the second sidewall 115. When viewed from a third direction Z, the cross-section of thermal management component 2 exhibits a wavy or serrated shape, effectively adapting to the edges of the hexagonal prism battery and achieving omnidirectional contact with the battery sidewalls.

[0044] Specifically, refer to Figure 7A thermal management component 2 is arranged between each pair of adjacent battery packs for heat dissipation. Multiple thermal management components 2 are arranged sequentially along the second direction Y and are respectively connected to the main coolant pipe. Specifically, the main coolant pipe can be set at both ends of the thermal management components 2 along the first direction X. The coolant is transported to each thermal management component 2 through the main coolant pipe at one end, and then recovered for cooling through the main coolant pipe at the other end, repeating the cycle.

[0045] This technical solution eliminates the need for additional structures to fix the battery pack 1, reducing the number of components used and maximizing space utilization through the prismatic arrangement, thereby increasing the energy density of the battery. Since the thermal management component 2 directly wraps around and fixes the individual battery cells, the additional fixing structures inside the housing 3 are greatly simplified or even eliminated. The hexagonal prism batteries, when tightly arranged, already have better space utilization than cylindrical batteries. Furthermore, the zigzag-shaped thermal management component 2 can more effectively fit the sidewalls, further reducing gaps and maximizing the internal space utilization of the battery pack, thus increasing energy density.

[0046] refer to Figure 8 In other embodiments of this application, the battery pack is provided with 12 battery packs 1, which are arranged in pairs to form a group of 6 groups. A thermal management component 2 is arranged between the two battery packs 1 in each group to regulate the temperature of the two battery packs 1. Similarly, multiple thermal management components 2 are arranged in sequence along the second direction Y and are respectively connected to the main coolant pipe.

[0047] The battery pack provided by this utility model, through its ingenious structural design and functional configuration, achieves multi-sided, efficient, and uniform heat dissipation of the battery cells, significantly increasing the heat dissipation area and improving thermal management efficiency. Simultaneously, the isolation provided by the insulating layer 23 and the structural support of the thermal management component 2 effectively prevent heat spread and thermal runaway, ensuring the safety of the battery pack. This utility model comprehensively solves the pain points of existing battery thermal management, such as insufficient heat dissipation, high risk of thermal runaway, and complex structure, thereby improving the energy density, cycle life, and overall reliability of the battery pack. It represents a significant advancement and has outstanding practical value in the field of battery technology.

[0048] In summary, the present invention provides a battery pack and an electrical device, which have the following advantages: 1) Achieving efficient heat dissipation from multiple sides: The thermal management component 2 is designed to include multiple first thermal management sections 24 and second thermal management sections 25. These thermal management sections are arranged alternately along the first direction X and are connected to the first side 114 and the second side 115 of the single cell 11, respectively. This allows the thermal management component 2 to directly contact and cover at least two sides of the single cell 11, greatly increasing the heat exchange area. This achieves efficient and uniform heat dissipation from multiple sides of the cell, significantly improving heat dissipation efficiency and effectively solving the problems of low efficiency and difficulty in eliminating local hot spots in traditional single-sided heat dissipation. For scenarios with high heat dissipation requirements, the introduction of a third side 116 and a third thermal management section 26 further enables heat dissipation from three or more sides, making heat dissipation more comprehensive and thorough.

[0049] 2) Enhanced structural stability and electrical isolation: The thermal management component 2 is fixedly connected to the housing 3 and bonded to the bottom wall 32, providing solid structural support for the battery pack 1. Simultaneously, the insulating layer 23 effectively prevents short circuits between the battery cells and the thermal management component 2, avoiding thermal runaway caused by electrical connection failures, thereby improving the overall electrical safety and reliability of the battery pack.

[0050] 3) Optimized space utilization and cooling channel 21: By setting the first thermal management unit 24 and the second thermal management unit 25 adjacent to each other along the first direction X at a specific angle, the arrangement of the individual cells 11 and thermal management components 2 inside the battery pack is optimized while ensuring heat dissipation, achieving a more compact stack and improving the space utilization and energy density of the battery pack. In addition, the thermal management unit is provided with a connected cooling channel 21, which allows the coolant to circulate effectively, thereby providing an active and efficient liquid cooling solution and further enhancing the heat dissipation capacity.

[0051] 4) Integrated design, simplified assembly: The modular design of the thermal management component 2, especially through direct bonding to the side of the individual battery cell 11, forms a tight and efficient heat conduction path. This design not only reduces intermediate connecting parts and lowers the overall thermal resistance, but also facilitates standardized production and simplifies the battery pack assembly process, reducing manufacturing costs and maintenance difficulty. The bottom-mounted design of the pressure relief valve 113 also ensures that the internal pressure of the cell can be safely released under extreme conditions, further improving safety.

[0052] The above are merely preferred embodiments of this utility model. It should be noted that, for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of this utility model, and these improvements and substitutions should also be considered within the protection scope of this utility model.

Claims

1. A battery pack, characterized in that, The battery pack has a first direction (X) and a second direction (Y) that are perpendicular to each other, including: Box (3), The battery pack (1) is located inside the housing (3). The battery pack (1) includes a plurality of individual cells (11) arranged along a first direction (X). Each individual cell (11) includes a first side (114) and a second side (115) that are adjacent to each other along the first direction (X). A thermal management component (2) is located inside the housing (3). The battery pack (1) is located on at least one side of the thermal management component (2) in the second direction (Y). The thermal management component (2) includes a plurality of first thermal management parts (24) and a plurality of second thermal management parts (25). The plurality of first thermal management parts (24) and the plurality of second thermal management parts (25) are alternately arranged along the first direction (X). Each first side (114) is connected to each first thermal management part (24), and each second side (115) is connected to each second thermal management part (25).

2. The battery pack according to claim 1, characterized in that, The battery pack also includes an insulating layer (23), a portion of which is disposed on the side of the first thermal management section (24) near the first side surface (114); another portion of which is disposed on the side of the second thermal management section (25) near the second side surface (115).

3. The battery pack according to claim 1, characterized in that, The battery pack also has a third direction (Z) that is perpendicular to both the first direction (X) and the second direction (Y). The housing (3) includes a frame (31) and a bottom wall (32) connected along the third direction (Z). The first thermal management unit (24) and the second thermal management unit (25) are both bonded to the bottom wall (32).

4. The battery pack according to claim 3, characterized in that, The battery pack also has a third direction (Z) that is perpendicular to both the first direction (X) and the second direction (Y). The single cell (11) also includes a top surface (117) and a bottom surface (118) arranged opposite to each other along the third direction (Z), a terminal post (112) and a pressure relief valve (113). The bottom surface (118) is connected to the bottom wall (32), the terminal post (112) is located on the top surface (117), and the pressure relief valve (113) is located on the bottom surface (118).

5. The battery pack according to claim 1, characterized in that, The first thermal management unit (24) and the second thermal management unit (25) adjacent to each other along the first direction (X) are both set at an angle to the first direction (X), and the included angle formed between the adjacent first thermal management unit (24) and the second thermal management unit (25) is an obtuse angle.

6. The battery pack according to claim 1, characterized in that, The first thermal management section (24) is bonded to the first side surface (114), and the second thermal management section (25) is bonded to the second side surface (115).

7. The battery pack according to claim 1, characterized in that, The first thermal management section (24) is provided with a first flow channel, and the second thermal management section (25) is provided with a second flow channel. The first flow channel and the second flow channel are connected to form a cooling flow channel (21) for introducing coolant. The cooling flow channel (21) extends along the first direction (X).

8. The battery pack according to any one of claims 1-7, characterized in that, The single cell (11) further includes a third side (116) connected to the second side (115) along the first direction; the thermal management component (2) further includes a plurality of third thermal management units (26), the plurality of third thermal management units (26) being connected to a plurality of second thermal management units (25) one by one, and the plurality of third thermal management units (26) being spaced apart from a plurality of first thermal management units (24) along the first direction (X), and the plurality of third side (116) being connected to a plurality of third thermal management units (26) one by one.

9. The battery pack according to claim 8, characterized in that, The surface of the second thermal management unit (25) is parallel to the first direction (X). The first thermal management unit (24) and the third thermal management unit (26) are both set at an angle to the first direction (X). The first thermal management unit (24) and the second thermal management unit (25) form an angle of 120°. The third thermal management unit (26) and the second thermal management unit (25) form an angle of 120°.

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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