Battery device and electric apparatus

Abstract

Provided in the present application are a battery device and an electric apparatus. The battery device comprises: a case having an accommodating cavity; battery cells, wherein the plurality of battery cells are arranged in the accommodating cavity, each battery cell comprises a casing and an electrode assembly arranged in the casing, and the casing comprises a first wall; a thermal management component arranged on the first walls, wherein the thermal management component is configured to regulate the temperature of the battery cells, the thermal management component has a first surface and a second surface that intersect with each other, and the first surface is arranged facing the first walls; and a first insulating member arranged on the thermal management component, wherein the first insulating member comprises a first insulating portion and a second insulating portion that intersect with each other, the first insulating portion is located between the first surface and the first walls, the first insulating portion covers at least part of the first surface, and the second insulating portion covers at least part of the second surface. The battery device and the electric apparatus provided in the present application can ensure their own reliability.

Description

Battery devices and electrical equipment

[0001] Cross-references to related applications

[0002] This application claims priority to Chinese patent application 202510120768.0, filed on January 24, 2025, entitled “Battery Device and Electrical Equipment”, the entire contents of which are incorporated herein by reference. Technical Field

[0003] This application relates to the field of battery technology, and in particular to a battery device and an electrical appliance. Background Technology

[0004] Energy conservation and emission reduction are key to the sustainable development of the automotive industry, and electric vehicles, due to their energy-saving and environmentally friendly advantages, have become an important component of this sustainable development. For electric vehicles, battery technology is a crucial factor in their development.

[0005] With the continuous development of battery technology, ensuring the reliability of battery devices is one of the problems that the industry needs to solve. Summary of the Invention

[0006] In view of the above problems, this application provides a battery device and an electrical device, wherein the battery device can guarantee its own reliability.

[0007] In a first aspect, this application provides a battery device, comprising: a housing having a receiving cavity; a battery cell having a plurality of battery cells disposed in the receiving cavity, the battery cell including a housing and an electrode assembly disposed within the housing, the housing including a first wall; a thermal management component disposed on the side of the first wall away from the electrode assembly, the thermal management component being used to regulate the temperature of the battery cell, the thermal management component having a first surface and a second surface intersecting each other, the first surface being disposed towards the first wall; and a first insulating member disposed on the thermal management component, the first insulating member including a first insulating portion and a second insulating portion intersecting each other, the first insulating portion being located between the first surface and the first wall, the first insulating portion covering at least a portion of the first surface, and the second insulating portion covering at least a portion of the second surface.

[0008] One embodiment of this application provides a battery device including a housing, battery cells, and a thermal management component. The battery cells are disposed within a receiving cavity of the housing, and the outer casing of the battery cells includes a first wall. The thermal management component is disposed on the first wall, enabling heat exchange between the thermal management component and the battery cells, ensuring that the battery cells operate at a suitable temperature. By providing a first insulating member, at least a portion of the first surface of the thermal management component is covered by its first insulating portion, and at least a portion of the second surface of the thermal management component is covered by its second insulating portion. That is, the first insulating member can cover the surface of the thermal management component facing the first wall and the surface adjacent to that surface, which helps to block the current transmission path between the thermal management component and the battery cells or other conductive components, reducing the risk of insulation failure between the thermal management component and the battery cells and other components, and ensuring the overall reliability of the battery device.

[0009] In some alternative embodiments, the first surface and the first wall are spaced apart from each other, and the first wall, the first insulating part and the thermal management component enclose a cavity, insulator being disposed in the cavity.

[0010] The battery device provided in one embodiment of this application reduces the risk of insulation failure between the thermal management component and the first wall by spacing the first surface and the first wall apart from each other and providing an insulator in the cavity. Furthermore, the provision of the insulator enables heat transfer and improves the heat exchange efficiency between the thermal management component and the battery cell.

[0011] In some alternative embodiments, the insulator includes a colloid, which is fixedly connected to the thermal management component and the first wall.

[0012] One embodiment of this application provides a battery device in which the insulator includes a colloid, and the colloid is fixedly connected to a thermal management component and a first wall. This not only fixes the relative position between the thermal management component and the battery cell, but also enables heat transfer through the insulator, thereby increasing the heat exchange rate between the thermal management component and the battery cell.

[0013] In some alternative embodiments, the insulator is integrally formed with the first insulating portion and the second insulating portion.

[0014] In some alternative embodiments, the first insulating part and the insulator are separately disposed, the thermal management component is disposed on the side of the first wall away from the electrode assembly in the first direction, and the thickness of the first insulating part in the first direction is in the range of 0.1 mm to 10 mm.

[0015] One embodiment of the battery device provided in this application, by separating the first insulating portion from the insulator, facilitates ensuring the coverage requirements of the first and second insulating portions on the first and second surfaces, and reduces the molding difficulty of the first and second insulating portions. Limiting the thickness of the first insulating portion in the first direction not only allows it to block the insulator, enabling it to be molded within a predetermined area of ​​the first wall, but also limits the molding height of the insulator, ensuring that it remains within a suitable height range to meet insulation and heat conduction requirements.

[0016] In some alternative embodiments, the first insulating member further includes a third insulating portion, the first insulating portion and the third insulating portion being spaced apart and disposed opposite to each other, a second insulating portion being connected between the first insulating portion and the third insulating portion, and a portion of the thermal management component being sandwiched between the first insulating portion and the third insulating portion.

[0017] One embodiment of this application provides a battery device that, by including a third insulating portion in the first insulating member, can effectively block the current transmission path between the thermal management component and the battery cell or other conductive components by covering at least a portion of the third surface of the thermal management component away from the first surface, thereby improving the reliability of the battery device. Furthermore, the third insulating portion cooperates with the first insulating portion to ensure a fixed connection between the first insulating member and the thermal management component.

[0018] In some alternative embodiments, the thermal management component is snap-fitted to at least one of the first insulating portion and the third insulating portion.

[0019] The battery device provided in one embodiment of this application, through the above-described configuration, can ensure the connection requirements between the thermal management component and the first insulating component, improve assembly efficiency, and at the same time, enable the first insulating component to be replaced in a timely manner when damaged, reducing the difficulty of replacement.

[0020] In some alternative embodiments, the first insulating part, the second insulating part, and the third insulating part are arranged to form an opening groove. The ends of the first insulating part and the third insulating part away from the second insulating part are each provided with a snap-fit ​​protrusion protruding into the opening groove. The thermal management component is provided with a slot, and a part of the thermal management component is inserted into the opening groove, with the snap-fit ​​protrusion snapping into the slot.

[0021] The battery device provided in one embodiment of this application, through the above-described configuration, can ensure the end insulation protection requirements of the first insulating member for the thermal management component, while also ensuring the connection strength requirements between the two.

[0022] In some alternative embodiments, the thermal management component is provided with a through hole that extends through the first surface, and the battery device further includes a second insulating member connected to the first surface and covering at least part of the through hole.

[0023] By setting a second insulating component, the location of the through hole can be protected, effectively blocking the current transmission path formed between the thermal management component and components such as battery cells at the through hole location.

[0024] In some alternative embodiments, a pressure relief component is provided on the first wall to release gas inside the battery cell, and a through hole is provided on the thermal management component in the area corresponding to the pressure relief component.

[0025] One embodiment of this application provides a battery device that includes a pressure relief component in each battery cell. When the internal pressure of the battery cell reaches a preset value, the pressure relief component opens and releases the internal pressure, reducing the risk of thermal runaway and improving the reliability of the battery device. By providing a through hole on the thermal management component corresponding to the pressure relief component, the pressure relief component can be avoided, ensuring that the depressurized gas can be smoothly discharged.

[0026] In some alternative embodiments, the second insulating member includes a stacked insulating plate and a buffer member, the buffer member being located between the insulating plate and the first wall and being compressible.

[0027] One embodiment of this application provides a battery device in which a second insulating member includes an insulating plate and a buffer member. The insulating plate covers at least a portion of the through-hole, effectively blocking the current transmission path between the thermal management component and components such as battery cells at the through-hole location. The buffer member, being compressible in a first direction, ensures tight contact between the buffer member and the thermal management component and the first wall. When the insulator is molded using a thermally conductive colloid, the buffer member can block the insulator, preventing it from spreading to the pressure relief component and affecting its normal operation, thus ensuring the reliability of the battery device.

[0028] In some alternative embodiments, the insulating plate is provided with a cavity, which is recessed from one side of the insulating plate toward the first wall to the other side, and the orthographic projection of the cavity onto the first wall is located within the orthographic projection of the through hole onto the first wall.

[0029] One embodiment of the battery device provided in this application, through the above-described configuration, allows the protruding portion formed by the recess to penetrate deep into the through hole during assembly, facilitating the assembly and positioning of the insulating plate. Furthermore, this configuration enables the portion penetrating the through hole to cover the hole wall, ensuring a barrier effect. Simultaneously, when a pressure relief component is provided, the recess can also avoid the pressure relief component, facilitating the discharge of gas by the pressure relief component and reducing the risk of thermal runaway.

[0030] In some alternative embodiments, the second insulating member includes a fourth insulating portion and a fifth insulating portion disposed intersecting each other, the fourth insulating portion covering at least a portion of the first surface, and the fifth insulating portion covering at least a portion of the hole wall of the through hole.

[0031] The battery device provided in one embodiment of this application, through the above-described configuration, can also effectively block the formation of a current transmission path between the thermal management component and components such as battery cells at the through-hole location. Furthermore, when the insulator is formed using insulating thermally conductive colloid, the insulating thermally conductive colloid can be blocked by the fourth insulating part to prevent it from spreading to the pressure relief component and affecting the normal operation of the pressure relief component, thus ensuring the reliability of the battery device.

[0032] In some alternative embodiments, the first insulating element, the second insulating element, and the thermal management component are all disposed overlapping the first wall portion of two or more battery cells.

[0033] The battery device provided in one embodiment of this application, through the above-mentioned configuration, enables the thermal management component to exchange heat with two or more battery cells simultaneously, ensuring heat exchange efficiency, and can block the formation of current transmission paths between the thermal management component and multiple battery cells and other components through the first insulating component and the second insulating component, thereby simplifying the structure of the battery device and reducing assembly difficulty.

[0034] In some alternative embodiments, the battery cell further includes an electrode terminal disposed on the first wall, the electrode terminal being electrically connected to an electrode assembly, and the battery device further includes a busbar component being electrically connected to the electrode terminals of at least two battery cells, with a second insulating portion located between the second surface and the busbar component.

[0035] The battery device provided in one embodiment of this application, through the above-described configuration, enables the first insulating member to not only block the formation of a current transmission path between the thermal management component and multiple battery cells, but also to block the formation of a current transmission path between the thermal management component and the busbar component, thereby ensuring the reliability of the battery cells.

[0036] In some optional embodiments, there are multiple thermal management components, and multiple battery cells are grouped into multiple battery cell assemblies. Each battery cell assembly includes two or more battery cells stacked together. Each battery cell assembly is provided with a corresponding thermal management component. The thermal management component is at least partially overlapped with the first wall of each battery cell in the same battery cell assembly. The thermal management component has two oppositely arranged second surfaces, and a first insulating member is provided for each of the second surfaces.

[0037] One embodiment of this application provides a battery device that groups multiple battery cells together, with each battery cell assembly having a corresponding thermal management component. This allows each thermal management component to exchange heat with the individual battery cells within its assembly, ensuring effective temperature regulation of the battery cells. Furthermore, a first insulating element is provided on each of the second surfaces to facilitate insulation between the thermal management component and the battery cells and current-carrying components.

[0038] In some alternative embodiments, the battery cell includes paired electrode terminals with opposite polarities, the electrode terminals being electrically connected to an electrode assembly, the paired electrode terminals being located on the same side of the housing, and each thermal management component being located between the paired electrode terminals of the same battery cell.

[0039] The battery device provided in one embodiment of this application, through the above-described configuration, can ensure the use of electrode terminals on the same side of the battery cells, and can also ensure the heat exchange requirements and energy density improvement requirements under this configuration.

[0040] In some optional embodiments, the number of thermal management components is multiple, and multiple battery cells are grouped into multiple battery cell assemblies. Each battery cell assembly includes two or more stacked battery cells, and each battery cell assembly is provided with two or more thermal management components. At least one thermal management component is at least partially overlapped with the first wall of each battery cell in two adjacent battery cell assemblies.

[0041] Secondly, this application provides an electrical device including the aforementioned battery device.

[0042] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0043] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0044] Figure 1 is a structural schematic diagram of a vehicle provided in an embodiment of this application;

[0045] Figure 2 is a schematic diagram of the structure of a battery device provided in an embodiment of this application;

[0046] Figure 3 is an exploded structural diagram of a battery cell according to an embodiment of this application;

[0047] Figure 4 is a partial exploded view of a battery device according to an embodiment of this application;

[0048] Figure 5 is a front view of a battery device according to an embodiment of this application;

[0049] Figure 6 is a magnified view of part A in Figure 5;

[0050] Figure 7 is a partial enlarged view of a battery device according to another embodiment of this application;

[0051] Figure 8 is a partial enlarged view of a battery device according to yet another embodiment of this application;

[0052] Figure 9 is a partial enlarged view of a battery device according to another embodiment of this application;

[0053] Figure 10 is a partial enlarged view of a battery device according to yet another embodiment of this application;

[0054] Figure 11 is a schematic diagram of the cooperation between the first insulating member and the thermal management component according to an embodiment of this application;

[0055] Figure 12 is an exploded view of the first insulating member and thermal management component according to an embodiment of this application;

[0056] Figure 13 is a top view of a battery device according to another embodiment of this application;

[0057] Figure 14 is a cross-sectional view along the BB direction in Figure 13;

[0058] Figure 15 is a magnified view of a portion of point C in Figure 14;

[0059] Figure 16 is a partial enlarged view of a battery device according to another embodiment of this application;

[0060] Figure 17 is a top view of a battery device according to yet another embodiment of this application.

[0061] Marking Explanation: 1. Vehicle; 100. Battery Unit; 300. Controller; 400. Motor; 200. Battery Module; 10. Housing; 101. Receiving Cavity; 11. First Housing Section; 12. Second Housing Section; 20. Battery Cell; 2a. Battery Cell Assembly; 20a. Outer Shell; 20b. First Wall; 21. Housing; 22. Electrode Assembly; 23. Cover Plate; 24. Electrode Terminal; 25. Pressure Relief Component; 30. Thermal Management Component; 31. First Surface; 32. Second Surface; 33. Through Hole; 40. First Insulator; 41. First Insulator Part; 42. Second Insulator Part; 43. Third Insulator Part; 44. Opening Slot; 45. Snap-fit ​​Protrusion; 46. Snap-fit ​​Slot; 50. Second Insulator; 51. Insulating Plate; 511. Cavity; 52. Buffer; 53. Fourth Insulator Part; 54. Fifth Insulator Part; 60. Insulator; 70. Busbar; X, first direction; Y, second direction. Detailed Implementation

[0062] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0063] It should be noted that, unless otherwise stated, the technical or scientific terms used in the embodiments of this application should have the ordinary meaning understood by those skilled in the art to which the embodiments of this application pertain.

[0064] In the description of the embodiments of this application, the technical 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., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of 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. Therefore, they should not be construed as limitations on the embodiments of this application.

[0065] Furthermore, technical terms such as "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. In the description of the embodiments of this application, "a plurality of" means two or more, unless otherwise explicitly defined.

[0066] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the technical terms such as "installation," "connection," "joining," and "fixing" 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 an electrical 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. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0067] In the description of the embodiments of this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0068] Currently, judging from market trends, the application of power batteries is becoming increasingly widespread. Power batteries are not only used in energy storage systems such as hydropower, thermal power, wind power, and solar power plants, but also extensively used in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in military equipment and aerospace. With the continuous expansion of power battery applications, market demand is also constantly increasing.

[0069] Understandably, the temperature environment inside a battery pack is affected by the external environment. The individual battery cells within the pack need to operate within a certain temperature range. When the temperature inside the pack exceeds or falls below this range, the stability of the individual cells and the overall battery performance will be significantly impacted. For example, in hot weather, the battery pack needs to cool the individual cells to maintain the required temperature range; in cold weather, the battery pack needs to heat the individual cells to keep the internal temperature within the required range.

[0070] In related technologies, the heat exchange structure located inside the battery device is prone to insulation failure between itself and components such as battery cells, which affects the reliability of the battery device.

[0071] Based on the above considerations, this application aims to ensure that the individual battery cells within the battery device operate within a certain temperature range and that the overall reliability of the battery device is guaranteed. One embodiment of this application provides a battery device including a housing, individual battery cells, a thermal management component, and a first insulating member. The housing has a receiving cavity in which multiple individual battery cells are disposed. Each individual battery cell includes a housing and an electrode assembly disposed within the housing. The housing includes a first wall. The thermal management component is disposed on the side of the first wall away from the electrode assembly and is used to regulate the temperature of the individual battery cells. The thermal management component has a first surface and a second surface that intersect, with the first surface facing the first wall. The first insulating member is disposed on the thermal management component and includes a first insulating portion and a second insulating portion that intersect, with the first insulating portion located between the first surface and the first wall. The first insulating portion covers at least a portion of the first surface, and the second insulating portion covers at least a portion of the second surface. By covering at least a portion of the first and second surfaces of the thermal management component with the first insulating member, the current transmission path between the thermal management component and the individual battery cells or other conductive components is blocked, reducing the risk of insulation failure between the thermal management component and the individual battery cells, thus ensuring the overall reliability of the battery device.

[0072] The technical solutions described in the embodiments of this application are applicable to electrical equipment that uses battery devices.

[0073] Electrical equipment can include vehicles, mobile phones, portable devices, laptops, ships, spacecraft, electric toys, and power tools, etc. Vehicles can be gasoline-powered cars, natural gas-powered cars, or new energy vehicles; new energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. Spacecraft include airplanes, rockets, space shuttles, and spacecraft, etc. Electric toys include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Power tools include metal cutting power tools, grinding power tools, assembly power tools, and railway power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers, etc. This application does not impose any special limitations on the above-mentioned electrical equipment.

[0074] It should be understood that the technical solutions described in the embodiments of this application are not limited to the electrical equipment described above, but can also be applied to all battery devices including housings and electrical equipment using battery devices. However, for the sake of brevity, the following embodiments will be described using an electric vehicle 1 as an example.

[0075] For example, as shown in Figure 1, vehicle 1 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. The interior of vehicle 1 can house a motor 400, a controller 300, and a battery device 100. The controller 300 controls the battery device 100 to supply power to the motor 400. For example, the battery device 100 can be located at the bottom, front, or rear of vehicle 1. The battery device 100 can be used to power vehicle 1; for example, it can serve as the operating power source for the vehicle 1's electrical system, such as meeting the power requirements for starting, navigation, and operation. In another embodiment of this application, the battery device 100 can not only serve as the operating power source for vehicle 1 but also as the driving power source, replacing or partially replacing gasoline or natural gas to provide driving power to vehicle 1.

[0076] It should be understood that the technical solutions described in the embodiments of this application are not limited to the above-mentioned vehicle 1.

[0077] In some embodiments, the battery device 100 may be an energy storage device, such as an energy storage cabinet or an energy storage container.

[0078] As shown in Figures 2 to 6, to meet different power needs, the battery device 100 includes a housing 10, battery cells 20, a thermal management component 30, and a first insulating component 40. The housing 10 has a receiving cavity 101, in which multiple battery cells 20 are disposed. Each battery cell 20 includes a housing 20a and an electrode assembly 22 disposed within the housing 20a. The housing 20a includes a first wall 20b. The thermal management component 30 is disposed on the side of the first wall 20b away from the electrode assembly 22. The thermal management component 30 is used to regulate the temperature of the battery cells 20. The thermal management component 30 has a first surface 31 and a second surface 32 that intersect each other, with the first surface 31 facing the first wall 20b. The first insulating component 40 is disposed on the thermal management component 30 and includes a first insulating portion 41 and a second insulating portion 42 that intersect each other. The first insulating portion 41 is located between the first surface 31 and the first wall 20b, covering at least a portion of the first surface 31, and the second insulating portion 42 covers at least a portion of the second surface 32.

[0079] The housing 10 can be a simple three-dimensional structure such as a cuboid, cylinder, or sphere, or it can be a complex three-dimensional structure composed of simple three-dimensional structures such as cuboids, cylinders, or spheres. This application embodiment does not limit this. The material of the housing 10 can be an alloy material such as aluminum alloy or iron alloy, or a polymer material such as polycarbonate or polyisocyanurate foam, or a composite material such as glass fiber and epoxy resin. This application embodiment also does not limit this.

[0080] The housing 10 is used to accommodate the battery cell 20, and the housing 10 can have various structures. In some embodiments, the housing 10 may include a first housing portion 11 and a second housing portion 12, which overlap each other, and together define a receiving cavity 101 for accommodating the battery cell 20. The second housing portion 12 may be a hollow structure with one end open, and the first housing portion 11 may be a plate-like structure, covering the open side of the second housing portion 12 to form a housing 10 with the receiving cavity 101; the first housing portion 11 and the second housing portion 12 may also be hollow structures with one side open, with the open side of the first housing portion 11 covering the open side of the second housing portion 12 to form a housing 10 with the receiving cavity 101. Of course, the first housing portion 11 and the second housing portion 12 can be various shapes, such as cylinders, cuboids, etc.

[0081] To improve the sealing performance after the first housing part 11 and the second housing part 12 are connected, a sealing element, such as sealant or sealing ring, can also be provided between the first housing part 11 and the second housing part 12.

[0082] Assuming that the first box part 11 covers the top of the second box part 12, the first box part 11 can also be called the upper box cover, and the second box part 12 can also be called the lower box 10.

[0083] In the battery device 100, there can be multiple battery cells 20. If there are multiple battery cells 20, they can be connected in series, in parallel, or in a mixed manner. A mixed connection means that multiple battery cells 20 are connected in both series and parallel. Multiple battery cells 20 can be directly connected in series, in parallel, or in a mixed manner, and then the whole assembly of multiple battery cells 20 can be housed in the housing 10. Alternatively, multiple battery cells 20 can first be connected in series, in parallel, or in a mixed manner to form a battery module 200, and then multiple battery modules 200 can be connected in series, in parallel, or in a mixed manner to form a whole assembly, which is then housed in the housing 10.

[0084] Multiple battery cells 20 in the battery module 200 can be electrically connected through a busbar 70 to achieve parallel, series, or mixed connection of multiple battery cells 20 in the battery module 200.

[0085] In this embodiment of the application, the battery cell 20 can be a secondary battery, which refers to a battery cell 20 that can be used again after being discharged by recharging to activate the active materials.

[0086] The battery cell 20 can be a lithium-ion battery, sodium-ion battery, sodium-lithium-ion battery, lithium metal battery, sodium metal battery, lithium-sulfur battery, magnesium-ion battery, nickel-metal hydride battery, nickel-cadmium battery, lead-acid battery, etc., and the embodiments of this application are not limited to this.

[0087] The outer casing 20a of the battery cell 20 can be a steel casing, an aluminum casing, a plastic casing (such as a polypropylene casing), a composite metal casing (such as a copper-aluminum composite casing 20a), or an aluminum-plastic film, etc. In some embodiments, the outer casing 20a serves to protect the electrode assembly 22, and a sealing bag is also included between the outer casing 20a and the electrode assembly 22. The sealing bag is used to encapsulate the electrode assembly 22 and the electrolyte. Specifically, the sealing bag can be a bag-shaped insulating component or an aluminum-plastic film. When the outer casing 20a is a sealed structure, it is used to encapsulate the electrode assembly 22 and the electrolyte, etc.

[0088] As an example, the battery cell 20 can be a cylindrical battery cell, a prismatic battery cell, a pouch battery cell, or a battery cell of other shapes. Prismatic battery cells include prismatic battery cells, blade-shaped battery cells, and multi-prismatic batteries, such as hexagonal prismatic batteries. This application does not have any particular limitations.

[0089] The electrode assembly 22 includes a positive electrode, a negative electrode, and a separator, with the separator positioned between the negative and positive electrodes. During the charging and discharging process of the battery cell 20, active ions (such as lithium ions) repeatedly insert and extract between the positive and negative electrodes. The separator, positioned between the positive and negative electrodes, serves to prevent short circuits between the positive and negative electrodes while allowing active ions to pass through.

[0090] The electrode assembly 22 can be a wound structure, a stacked structure, or a hybrid structure of wound and stacked.

[0091] In some embodiments, the electrode assembly 22 is a wound structure. The positive electrode and the negative electrode are wound into a wound structure.

[0092] In some embodiments, the electrode assembly 22 has a stacked structure.

[0093] As an example, multiple positive and negative electrodes can be set, and multiple positive and multiple negative electrodes can be stacked alternately.

[0094] As an example, multiple positive electrode plates can be provided, and negative electrode plates can be folded to form multiple stacked folded segments, with a positive electrode plate sandwiched between adjacent folded segments.

[0095] As an example, both the positive and negative electrode plates are folded to form multiple stacked folded segments.

[0096] As an example, multiple separators can be provided, each positioned between any adjacent positive or negative electrode plates.

[0097] As an example, the separators can be continuously arranged, either by folding or rolling between any adjacent positive or negative electrode plates.

[0098] In some embodiments, the electrode assembly 22 may be cylindrical, flat, or polygonal in shape.

[0099] In some embodiments, the electrode assembly 22 is provided with tabs that allow current to be drawn from the electrode assembly 22. The tabs include a positive tab and a negative tab.

[0100] In some embodiments, the outer casing 20a of the battery cell 20 may include a housing 21 and a cover plate 23. The housing 21 has a cavity and an opening communicating with the cavity, and the cover plate 23 may be disposed at the opening of the housing 21 and connected to the housing 21.

[0101] The first wall 20b can be any wall portion of the outer casing 20a. The casing 21 can include the first wall 20b, or the cover plate 23 can include the first wall 20b. Optionally, the cover plate 23 includes the first wall 20b.

[0102] The number of thermal management components 30 can be one or more. When there are more than two, each thermal management component 30 is provided with a first insulating element 40.

[0103] The thermal management component 30 may include a tubular or plate-like structure with heat exchange channels. The heat exchange plate or heat exchange tube defines the heat exchange channels, and the heat exchange fluid within the heat exchange channels exchanges heat with the battery cell 20 through the heat exchange tubes to control the temperature of the battery cell 20. The cross-section of the heat exchange tube can be circular, elliptical, polygonal, etc., and the cross-sectional shape of the heat exchange tube or heat exchange plate can be reasonably set as needed.

[0104] The first surface 31 and the second surface 32 of the thermal management component 30 can be a plane, a curved surface, or a surface with concave or convex shapes. Optionally, the included angle between the first surface 31 and the second surface 32 can be greater than 0° and less than 180°. Optionally, the included angle between the first surface 31 and the second surface 32 can be 90°, that is, the first surface 31 and the second surface 32 can optionally be set perpendicular to each other.

[0105] The first surface 31 can be located on the side of the thermal management component 30 facing the first wall 20b, and the first surface 31 and the first wall 20b can be insulated from each other and exchange heat.

[0106] An insulating coating may be provided on each of the external walls of the thermal management component 30.

[0107] The angle at which the first insulating part 41 and the second insulating part 42 intersect each other can be adapted to the angle at which the first surface 31 and the second surface 32 intersect.

[0108] The first insulating part 41 and the second insulating part 42 can be an integral structure. Of course, in some embodiments, the first insulating part 41 and the second insulating part 42 can also be formed separately and intersected.

[0109] The first insulating part 41 and the second insulating part 42 can be made of the same material or different materials.

[0110] The first insulating part 41, the second insulating part 42 and the thermal management component 30 can be connected by adhesive bonding. Of course, in some embodiments, the first insulating part 41 and / or the second insulating part 42 and the thermal management component 30 can also be connected by snap-fit ​​bonding.

[0111] The first insulating part 41 can cover part of the first surface 31, and the first insulating part 41 can elevate the thermal management component 30 and space it from the first wall 20b.

[0112] The second insulating part 42 may cover part or all of the second surface 32. The second insulating part 42 may prevent the thermal management component 30 from forming a current transmission path between the second surface 32 and components such as the outer casing 20a of the battery cell 20.

[0113] One or more first insulating elements 40 may be provided on the thermal management component 30. For example, when the thermal management component 30 is polyhedral, the first insulating element 40 may be provided on one of its faces. Alternatively, the first insulating element 40 may be provided on at least two faces. Optionally, two first insulating elements 40 may be symmetrically provided for each thermal management component 30.

[0114] One embodiment of this application provides a battery device 100 in which a thermal management component 30 is disposed on a first wall 20b. The thermal management component 30 can exchange heat with the battery cell 20, ensuring that the battery cell 20 operates at a suitable temperature. The first insulating member 40 covers at least a portion of the first surface 31 of the thermal management component 30 with its first insulating portion 41, and at least a portion of the second surface 32 of the thermal management component 30 with its second insulating portion 42. In other words, the first insulating member 40 covers the surface of the thermal management component 30 facing the first wall 20b and the surface adjacent to it, effectively blocking the current transmission path between the thermal management component 30 and the battery cell 20 or other conductive components. This reduces the risk of insulation failure between the thermal management component 30 and components such as the battery cell 20, ensuring the overall reliability of the battery device 100.

[0115] Please refer to Figure 7. In some optional embodiments, the battery device 100 provided in one embodiment of this application has a first surface 31 and a first wall 20b spaced apart from each other. The first wall 20b, the first insulating part 41 and the thermal management component 30 enclose a cavity, and an insulator 60 is disposed in the cavity.

[0116] Insulator 60 can serve as an insulating and heat-conducting agent.

[0117] The first surface 31 and the first wall 20b are spaced apart, so that the thermal management component 30 as a whole is spaced apart from the first wall 20b.

[0118] One embodiment of the present application provides a battery device 100, which reduces the risk of insulation failure between the thermal management component 30 and the first wall 20b by spacing the first surface 31 and the first wall 20b apart from each other and providing an insulator 60 in the cavity. Furthermore, by providing the insulator 60, heat transfer can be achieved, thereby improving the heat exchange efficiency between the thermal management component 30 and the battery cell 20.

[0119] In some alternative embodiments, the battery device 100 provided in one embodiment of this application has an insulator 60 comprising a gel, which is fixedly connected to the thermal management component 30 and the first wall 20b.

[0120] Insulator 60 may include an insulating and thermally conductive colloid.

[0121] The insulating thermally conductive colloid can be applied to the first wall 20b by means of coating or other methods, and the thermal management component 30 is pressed onto the insulating thermally conductive colloid. After it is cured, an insulator 60 is formed, and the relative positions of the thermal management component 30 and the battery cell 20 are fixed.

[0122] The first insulating element 40 and the insulator 60 can be an integral structure or a separate structure.

[0123] One embodiment of this application provides a battery device 100 in which the insulator 60 includes a colloid, and the colloid is fixedly connected to the thermal management component 30 and the first wall 20b. This not only fixes the relative position between the thermal management component 30 and the battery cell 20, but also enables heat transfer through the insulator 60, thereby increasing the heat exchange rate between the thermal management component 30 and the battery cell 20.

[0124] Please refer to Figure 8. In some optional embodiments, the battery device 100 provided in one embodiment of this application has an insulator 60 integrated with the first insulating part 41 and the second insulating part 42.

[0125] The first insulating part 41, the second insulating part 42, and the insulator 60 can be connected to the thermal management component 30 by adhesive bonding.

[0126] During molding, an insulating and thermally conductive colloid can be applied to the first wall 20b. The thermal management component 30 is pressed onto the insulating and thermally conductive colloid, and a portion of the colloid is made to flow from the first surface 31 to the second surface 32 by means of extrusion or other methods. After the insulating and thermally conductive colloid is cured, an integral insulator 60, a first insulating part 41, and a second insulating part 42 are formed.

[0127] Of course, in some embodiments, the insulator 60, the first insulating part 41, and the second insulating part 42 can be pre-molded as a single unit and assembled together with the thermal management component 30, and then the assembled whole can be fixed to the first wall 20b of the battery cell 20 by means of bonding or other methods.

[0128] Please refer to Figures 6, 7 and 9. In some optional embodiments, the battery device 100 provided in one embodiment of this application has a first insulating part 41 and an insulator 60 separately disposed. The thermal management component 30 is disposed on the side of the first wall 20b away from the electrode assembly 22 in the first direction X. The thickness dimension d of the first insulating part 41 in the first direction X is in the range of 0.1 mm to 10 mm.

[0129] The first direction X can be the height direction of the battery cell 20, and the first wall 20b and the thermal management component 30 are distributed along the first direction X.

[0130] The thickness d of the first insulating portion 41 in the first direction X can be any value between 0.1 mm and 10 mm, including both 0.1 mm and 10 mm. Optionally, the thickness d of the first insulating portion 41 in the first direction X can be any value between 5 mm and 10 mm. Some optional examples include 7 mm, 8 mm, 9 mm, etc.

[0131] One embodiment of the battery device 100 provided in this application, by separately configuring the first insulating portion 41 and the insulator 60, facilitates ensuring the coverage requirements of the first insulating portion 41 and the second insulating portion 42 on the first surface 31 and the second surface 32, and reduces the molding difficulty of the first insulating portion 41 and the second insulating portion 42. Limiting the thickness of the first insulating portion 41 in the first direction X not only allows the first insulating portion 41 to block the insulator 60, enabling it to be molded within a predetermined area of ​​the first wall 20b, but also limits the molding height of the insulator 60, ensuring that it remains within a suitable height range to meet insulation and heat conduction requirements.

[0132] Please refer to Figure 10. In some optional embodiments, the battery device 100 provided in one embodiment of this application further includes a third insulating portion 43 in the first insulating member 40. The first insulating portion 41 and the third insulating portion 43 are spaced apart and disposed opposite to each other. The second insulating portion 42 is connected between the first insulating portion 41 and the third insulating portion 43. The thermal management component 30 is partially sandwiched between the first insulating portion 41 and the third insulating portion 43.

[0133] The third insulating part 43 and the first insulating part 41 can be spaced apart and arranged opposite each other in the first direction X. Optionally, they can be arranged in parallel. Of course, the third insulating part 43 can also be arranged at a certain angle relative to the first insulating part 41.

[0134] The thermal management component 30 can be connected and fixed to at least one of the first insulating part 41 and the third insulating part 43 by means of bonding, snap-fitting or other methods. Of course, the thermal management component 30 and the first insulating part 40 can also be fixed to each other by means of interference fit. For example, the distance between the first insulating part 41 and the third insulating part 43 in the first direction X can be made smaller than the thickness of the thermal management component 30 in the first direction X, so that the thermal management component 30 can be partially clamped and fixed in the first insulating part 40.

[0135] One embodiment of the battery device 100 provided in this application includes a first insulating member 40 further comprising a third insulating portion 43. This third insulating portion 43 covers at least a portion of the third surface of the thermal management component 30 that is disposed opposite to the first surface 31, effectively blocking the current transmission path between the thermal management component 30 and the battery cell 20 or other conductive components, thereby improving the reliability of the battery device 100. Furthermore, the third insulating portion 43 cooperates with the first insulating portion 41 to ensure a fixed connection between the first insulating member 40 and the thermal management component 30.

[0136] Please refer to Figures 10 to 12. In some optional embodiments, the thermal management component 30 of the battery device 100 provided in one embodiment of this application is snapped into at least one of the first insulating portion 41 and the third insulating portion 43.

[0137] The thermal management component 30 can be snapped and fixed to one of the first insulating part 41 and the third insulating part 43, or it can be snapped and fixed to both of them.

[0138] The snap-fit ​​fixing can be understood as one of the two connected parts having a protrusion on one side and a corresponding slot on the other side. The protrusion is snapped into the backrest, which can restrict the relative movement between the two parts and achieve the purpose of fixing.

[0139] The battery device 100 provided in one embodiment of this application, through the above-mentioned arrangement, can not only ensure the connection requirements between the thermal management component 30 and the first insulating component 40 and improve assembly efficiency, but also enable the first insulating component 40 to be replaced in a timely manner when damaged, reducing the difficulty of replacement.

[0140] Please refer to Figures 10 to 12. In some optional embodiments, the battery device 100 provided in one embodiment of this application has a first insulating part 41, a second insulating part 42, and a third insulating part 43 forming an opening groove 44. The ends of the first insulating part 41 and the third insulating part 43 opposite to the second insulating part 42 are each provided with a snap-fit ​​protrusion 45 protruding into the opening groove 44. The thermal management component 30 is provided with a slot 46, and a part of the thermal management component 30 is inserted into the opening groove 44, with the snap-fit ​​protrusion 45 snapping into the slot 46.

[0141] The shape of the snap-fit ​​protrusion 45 matches the shape of the slot 46.

[0142] The shape of the snap-fit ​​protrusion 45 on the first insulating part 41 and the shape of the snap-fit ​​protrusion 45 on the third insulating part 43 can be the same and symmetrically arranged.

[0143] The battery device 100 provided in one embodiment of this application, through the above-described configuration, can ensure the end insulation protection requirements of the first insulating member 40 to the thermal management member 30, and at the same time ensure the connection strength requirements between the two.

[0144] Please refer to Figures 13 to 15. In some optional embodiments, the battery device 100 provided in one embodiment of this application has a through hole 33 on the thermal management component 30. The through hole 33 is disposed through the first surface 31. The battery device 100 also includes a second insulating member 50, which is connected to the first surface 31 and covers at least part of the through hole 33.

[0145] There can be one or more through holes 33. Through holes 33 can be used for clearance or for mounting corresponding functional devices.

[0146] The second insulating member 50 can cover part of the first surface 31. It can be stacked with the first surface 31. Of course, other components can also be sandwiched between it and the first surface 31. All of these can be understood as covering the first surface 31.

[0147] The second insulating member 50 may cover the through hole 33 in the first direction X, or it may cover the hole wall in a direction intersecting the first direction X, for example, covering at least a portion of the through hole 33 in the second direction Y.

[0148] Since there is a risk of current transmission path forming between the through hole 33 and components such as the battery cell 20, the second insulating member 50 can protect the through hole 33 and effectively block the thermal management component 30 from forming a current transmission path between the through hole 33 and components such as the battery cell 20.

[0149] In some alternative embodiments, a battery device 100 provided in one embodiment of this application has a pressure relief component 25 provided on the first wall 20b. The pressure relief component 25 is used to release gas in the battery cell 20, and a through hole 33 is provided on the thermal management component 30 in the area corresponding to the pressure relief component 25.

[0150] The pressure relief component 25 may include a pressure relief valve or a breathable pressure relief membrane layer, etc.

[0151] A second insulating element 50 is installed at the position of through hole 33.

[0152] One embodiment of this application provides a battery device 100 that includes a pressure relief component 25 within the battery cell 20. This allows the pressure relief component 25 to open and release the internal pressure of the battery cell 20 when the internal pressure reaches a preset value, reducing the risk of thermal runaway and improving the reliability of the battery device 100. By providing a through hole 33 on the thermal management component 30 at a position corresponding to the pressure relief component 25, the pressure relief component 25 can be bypassed, ensuring that the depressurized gas can be smoothly discharged.

[0153] Please refer to Figures 13 to 15. In some optional embodiments, the battery device 100 provided in one embodiment of this application includes a second insulating member 50 comprising an insulating plate 51 and a buffer member 52 stacked together. The buffer member 52 is located between the insulating plate 51 and the first wall 20b and is compressibly disposed.

[0154] The cushioning component 52 includes rubber, foam, etc.

[0155] The buffer 52 can be compressibly configured in the first direction X.

[0156] Insulating board 51 can be made of rigid materials, etc.

[0157] Optionally, the buffer 52 may be disposed around the outer periphery of the pressure relief component 25.

[0158] One embodiment of the battery device 100 provided in this application, by making the second insulating member 50 include an insulating plate 51 and a buffer member 52, can effectively block the current transmission path formed between the thermal management component 30 and components such as the battery cell 20 at the location of the through hole 33 by covering at least a portion of the through hole 33 with the insulating plate 51. The buffer member 52 is provided and is compressible in the first direction X, which can ensure that the buffer member 52 is in close contact with the thermal management component 30 and the first wall 20b. When the insulator 60 is made of thermally conductive colloid, the buffer member 52 can block the insulator 60, preventing it from spreading to the pressure relief component 25 and affecting the normal operation of the pressure relief component 25, thus ensuring the reliability of the battery device 100.

[0159] In some alternative embodiments, the battery device 100 provided in one embodiment of this application has a cavity 511 provided on the insulating plate 51. The cavity 511 is recessed from one side of the insulating plate 51 toward the first wall 20b to the other side. The orthographic projection of the cavity 511 onto the first wall 20b is located within the orthographic projection of the through hole 33 onto the first wall 20b.

[0160] The cavity 511 is recessed from one side of the insulating plate 51 toward the first wall 20b to the other side, so that a protrusion protruding away from the side where the first wall is located is provided at the corresponding position of the cavity.

[0161] The shape of the cavity 511 can match the shape of the through hole 33. The protrusion formed by the cavity 511 can be clearance-fitted with the through hole 33, or it can be interference-fitted.

[0162] The insulating plate 51 may be an integral structure and covered with through holes 33 in the first direction X.

[0163] One embodiment of the battery device 100 provided in this application, through the above-described configuration, allows the protruding portion formed by the cavity 511 to extend into the through hole 33 during assembly, facilitating the assembly and positioning of the insulating plate 51. Furthermore, this configuration allows the portion extending into the through hole 33 to cover the hole wall, ensuring a barrier effect. Simultaneously, when a pressure relief component 25 is provided, the cavity 511 can also avoid the pressure relief component 25, facilitating the release of gas by the pressure relief component 25 and reducing the risk of thermal runaway.

[0164] Please refer to Figure 16. In some optional embodiments, the battery device 100 provided in one embodiment of this application uses the second insulating member 50 as described above. This is only one optional implementation. In some embodiments, the second insulating member 50 may also include a fourth insulating part 53 and a fifth insulating part 54 that are intersected. The fourth insulating part 53 covers at least a portion of the first surface 31, and the fifth insulating part 54 covers at least a portion of the hole wall of the through hole 33.

[0165] The fourth insulating part 53 and the fifth insulating part 54 can be an integral structure, or they can be separate structures.

[0166] The battery device 100 provided in one embodiment of this application, through the above-described configuration, can also effectively block the formation of a current transmission path between the thermal management component 30 and components such as the battery cell 20 at the through hole 33. Furthermore, when the insulator 60 is formed using an insulating thermally conductive colloid, the insulating thermally conductive colloid can be blocked by the fourth insulating part 53 to prevent it from spreading to the pressure relief component 25 and affecting the normal operation of the pressure relief component 25, thus ensuring the reliability of the battery device 100.

[0167] In some optional embodiments, in one embodiment of this application, the battery device 100, the first insulating member 40, the second insulating member 50, and the thermal management component 30 are all partially overlapped with the first wall 20b of two or more battery cells 20.

[0168] In other words, each thermal management component 30 can exchange heat with two or more battery cells 20, and each first insulating component 40 and second insulating component 50 can respectively cover the first wall 20b of two or more battery cells 20.

[0169] The battery device 100 provided in one embodiment of this application, through the above-mentioned configuration, enables the thermal management component 30 to exchange heat with two or more battery cells 20 at the same time, ensuring heat exchange efficiency, and can block the formation of current transmission paths between the thermal management component 30 and multiple battery cells 20 and other components through the first insulating component 40 and the second insulating component 50, which can simplify the structure of the battery device 100 and reduce assembly difficulty.

[0170] Please continue to refer to Figures 3 to 16. In some optional embodiments, the battery device 100 provided in one embodiment of this application further includes an electrode terminal 24 disposed on the first wall 20b of the battery cell 20. The electrode terminal 24 is electrically connected to the electrode assembly 22. The battery device 100 also includes a busbar 70, which is electrically connected to the electrode terminals 24 of at least two battery cells 20. The second insulating portion 42 is located between the second surface 32 and the busbar 70.

[0171] The busbar component 70 can be electrically connected to the electrode terminals 24 of two or more battery cells 20 to connect the two or more battery cells 20 in series and / or in parallel.

[0172] The second insulating portion 42 can be located between the second surface 32 and the current-carrying member 70 in the second direction Y. The second direction Y can be the width direction or the length direction of the battery cell 20, and the first direction X can be the height direction of the battery cell 20.

[0173] The number of electrode terminals 24 provided on the first wall 20b can be one or two. When there are two, the polarities of the two electrode terminals 24 can be opposite.

[0174] The battery device 100 provided in one embodiment of this application, through the above-described configuration, enables the first insulating member 40 to not only block the formation of a current transmission path between the thermal management component 30 and components such as multiple battery cells 20, but also to block the formation of a current transmission path between the thermal management component 30 and the busbar component 70, thereby ensuring the reliability of the battery cells 20.

[0175] In some optional embodiments, the battery device 100 provided in one embodiment of this application has a plurality of thermal management components 30. The plurality of battery cells 20 are grouped into multiple battery cell assemblies 2a. Each battery cell assembly 2a includes two or more battery cells 20 stacked together. Each battery cell assembly 2a is provided with a corresponding thermal management component 30. The thermal management component 30 is at least partially overlapped with the first wall 20b of each battery cell 20 in the same battery cell assembly 2a. The thermal management component 30 has two oppositely arranged second surfaces 32, and a first insulating member 40 is provided for each second surface 32.

[0176] The battery cell assembly 2a may include two or more battery cells 20 stacked on top of each other. Each battery cell 20 may have two electrode terminals 24 with opposite polarities on one side of the first wall 20b. Correspondingly, the thermal management component 30 corresponding to the battery cell assembly 2a may be located between the two battery cells 20. Alternatively, a single electrode terminal 24 may be provided on the first wall 20b on the first direction X side. Correspondingly, the thermal management component 30 corresponding to the battery cell assembly 2a may have a through hole 33.

[0177] The thermal management component 30 may have two opposing second surfaces 32 in the second direction Y. In some alternative examples, the first insulating elements 40 disposed on the two second surfaces 32 may be symmetrically distributed.

[0178] One embodiment of this application provides a battery device 100 that groups multiple battery cells 20 together, with each battery cell assembly 2a corresponding to a thermal management component 30. This allows each thermal management component 30 to exchange heat with each battery cell 20 within its corresponding assembly, ensuring effective temperature regulation of the battery cells 20. Furthermore, a first insulating member 40 is provided on each second surface 32 to facilitate insulation between the thermal management component 30 and the battery cells 20, as well as the current collector 70.

[0179] Please refer to Figures 13 to 16. In some optional embodiments, one embodiment of the present application provides a battery device 100, in which a battery cell 20 includes paired electrode terminals 24 with opposite polarities. The electrode terminals 24 are electrically connected to an electrode assembly 22. The paired electrode terminals 24 are located on the same side of the housing 20a. Each thermal management component 30 is located between the paired electrode terminals 24 of the same battery cell 20.

[0180] Two electrode terminals 24 with opposite polarities protrude from the same side of the first wall 20b, with a large space between them. The thermal management component 30 is located between the two electrode terminals 24.

[0181] The battery device 100 provided in one embodiment of this application, through the above-described configuration, can ensure the use of the electrode terminal 24 on the same side of the battery cell 20, and can also ensure the heat exchange requirements and energy density improvement requirements under this configuration.

[0182] Please refer to Figure 17. In some optional embodiments, the battery device 100 provided in one embodiment of this application has a plurality of thermal management components 30. The plurality of battery cells 20 are grouped into multiple battery cell assemblies 2a. Each battery cell assembly 2a includes two or more battery cells 20 stacked together. Each battery cell assembly 2a is provided with two or more thermal management components 30. At least one thermal management component 30 is at least partially overlapped with the first wall 20b of each battery cell 20 of two adjacent battery cell assemblies 2a.

[0183] The number of thermal management components 30 provided for each battery cell assembly 2a can be two or more, and can be optionally two. For example, the two thermal management components 30 can be located on both sides of the electrode terminal 24. When the battery cell 20 includes two electrode terminals 24 on the same side in the first direction X, the two thermal management components 30 can be located on the side of the two electrode terminals 24 away from each other.

[0184] Optionally, two adjacent battery cell assemblies 2a may share one of the thermal management components 30. For example, one side of the thermal management component 30 may overlap with the first wall 20b of each battery cell 20 of one battery cell assembly 2a, and the other side may overlap with the first wall 20b of each battery cell 20 of the other battery cell assembly 2a.

[0185] The above-mentioned configuration can also be configured such that a first insulating element 40 is provided on both sides of the thermal management component 30. For example, a first insulating element 40 can be provided between the component and each battery cell assembly 2a.

[0186] The battery device 100 provided in one embodiment of this application, through the above-described configuration, can also guarantee the heat exchange and reliability requirements under this type of configuration, and can improve the energy density.

[0187] Please refer to Figures 2 to 4 and Figures 10 to 16. One embodiment of this application provides a battery device 100, including a housing 10, battery cells 20, a thermal management component 30, a first insulating member 40, and a second insulating member 50. The housing 10 has a receiving cavity 101, and the housing 10 can be generally square-shell shaped. Multiple battery cells 20 are disposed in the receiving cavity 101. The multiple battery cells 20 are grouped into multiple battery cell assemblies 2a. Each battery cell assembly 2a includes two or more stacked battery cells 20. Each battery cell assembly 2a is correspondingly provided with a thermal management component 30. The thermal management component 30 at least partially overlaps with the first wall 20b of each battery cell 20 in the same battery cell assembly 2a. Each battery cell 20 includes a housing 20a, an electrode assembly 22 disposed within the housing 20a, electrode terminals 24 disposed on the first wall 20b, and a busbar 70. The electrode terminals 24 are electrically connected to the electrode assembly 22, and the busbar 70 is electrically connected to the electrode terminals 24 of at least two battery cells 20. The thermal management component 30 is disposed on the side of the first wall 20b away from the battery cell assembly 2a in the first direction X. The thermal management component 30 has a first surface 31 and a second surface 32 that are intersected. The second surface 32 is disposed in pairs in the second direction Y and is connected to the first wall 20b respectively. The first surface 31 is disposed towards the first wall 20b, and the second surface 32 is disposed towards the electrode terminal 24 and the busbar component 70. The first insulating member 40 is disposed on the thermal management component 30. The first insulating member 40 includes a first insulating part 41, a second insulating part 42, and a third insulating part 43. The first insulating part 41 is located between the first surface 31 and the first wall 20b, and the first insulating part 41 covers at least a portion of the first surface 31. The second insulating part 42 covers at least a portion of the second surface 32. The first insulating part 41 and the third insulating part 43 are spaced apart and disposed opposite to each other. The second insulating part 42 is connected between the first insulating part 41 and the third insulating part 43. The thermal management component 30 is partially sandwiched between the first insulating part 41 and the third insulating part 43. The first insulating part 41, the second insulating part 42, and the third insulating part 43 enclose and form an opening groove 44. The ends of the first insulating part 41 and the third insulating part 43 opposite to the second insulating part 42 are each provided with a snap-fit ​​protrusion 45 protruding into the opening groove 44. The thermal management component 30 is provided with a slot 46, and the thermal management component 30 is partially inserted into the opening groove 44. The snap-fit ​​protrusion 45 snaps into the slot 46. The first surface 31 and the first wall 20b are spaced apart from each other. The first wall 20b, the first insulating part 41, and the thermal management component 30 enclose a cavity, and an insulator 60 is disposed in the cavity. The insulator 60 includes a colloid. The insulator 60 is fixedly connected to the thermal management component 30 and the first wall 20b. The first insulating part 41 and the insulator 60 are separately disposed. The thermal management component 30 is disposed on the side of the first wall 20b facing away from the electrode assembly 22 in the first direction X. The thickness of the first insulating part 41 in the first direction X is 10 mm.A through-hole 33 is provided on the thermal management component 30, penetrating the first surface 31. The second insulating component 50 covers the first surface 31 and at least part of the through-hole 33. A pressure relief component 25 is provided on the first wall 20b, which is used to release gas inside the battery cell 20. The through-hole 33 is provided on the thermal management component 30 corresponding to the pressure relief component 25. The second insulating component 50 includes an insulating plate 51 and a buffer component 52 stacked together. The buffer component 52 is located between the insulating plate 51 and the first wall 20b and is compressible. A cavity 511 is provided on the insulating plate 51, which is recessed from one side of the insulating plate 51 toward the first wall 20b to the other side. The orthographic projection of the cavity 511 onto the first wall 20b is located within the orthographic projection of the through-hole 33. There are multiple thermal management components 30. Each group of battery cell assembly 2a is provided with one thermal management component 30. The thermal management component 30 is provided with two oppositely arranged first insulating members 40 and a second insulating member 50 located between the two first insulating members 40. The paired electrode terminals 24 are located on the same side of the housing 20a. Each thermal management component 30 is located between the paired electrode terminals 24 of the same battery cell 20.

[0188] On the other hand, this application also provides an electrical device, including the battery device 100 provided in the above embodiments.

[0189] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, comprising: The box-shaped enclosure has a receiving cavity; A battery cell, a plurality of said battery cells are disposed in the receiving cavity, said battery cell includes a housing and an electrode assembly disposed within said housing, said housing includes a first wall; A thermal management component is disposed on the side of the first wall away from the electrode assembly. The thermal management component is used to regulate the temperature of the battery cell. The thermal management component has a first surface and a second surface that are arranged intersectingly, with the first surface facing the first wall. A first insulating member is disposed on the thermal management component. The first insulating member includes a first insulating portion and a second insulating portion that are intersected and disposed therebetween. The first insulating portion is located between the first surface and the first wall. The first insulating portion covers at least a portion of the first surface, and the second insulating portion covers at least a portion of the second surface.

2. The battery device according to claim 1, wherein, The first surface and the first wall are spaced apart from each other, and the first wall, the first insulating part and the thermal management component enclose a cavity, insulators are disposed in the cavity.

3. The battery device according to claim 2, wherein, The insulator includes a colloid, which is fixedly connected to the thermal management component and the first wall.

4. The battery device according to claim 2, wherein, The insulator is an integral structure with the first insulating part and the second insulating part.

5. The battery device according to claim 2, wherein, The first insulating part is separately disposed from the insulator, and the thermal management component is disposed on the side of the first wall away from the electrode assembly in the first direction. The thickness of the first insulating part in the first direction is in the range of 0.1 mm to 10 mm.

6. The battery device according to any one of claims 1 to 5, wherein, The first insulating member further includes a third insulating portion, the first insulating portion and the third insulating portion being spaced apart and disposed opposite to each other, the second insulating portion being connected between the first insulating portion and the third insulating portion, and a portion of the thermal management component being sandwiched between the first insulating portion and the third insulating portion.

7. The battery device according to claim 6, wherein, The thermal management component is snapped into at least one of the first insulating part and the third insulating part.

8. The battery device according to claim 7, wherein, The first insulating part, the second insulating part, and the third insulating part surround and form an opening groove. The first insulating part and the third insulating part are each provided with a snap-fit ​​protrusion at the end away from the second insulating part, which protrudes into the opening groove. The thermal management component is provided with a slot, and part of the thermal management component is inserted into the opening groove. The snap-fit ​​protrusion snaps into the slot.

9. The battery device according to any one of claims 1 to 8, wherein, The thermal management component is provided with a through hole that penetrates the first surface. The battery device also includes a second insulating member that is connected to the first surface and covers at least a portion of the through hole.

10. The battery device according to claim 9, wherein, The first wall is provided with a pressure relief component, which is used to release the gas in the battery cell, and the thermal management component is provided with the through hole in the area corresponding to the pressure relief component.

11. The battery device according to claim 9, wherein, The second insulating element includes an insulating plate and a buffer element stacked together, the buffer element being located between the insulating plate and the first wall and being compressible.

12. The battery device according to claim 11, wherein, The insulating plate is provided with a cavity, which is recessed from one side of the insulating plate toward the first wall to the other side. The orthographic projection of the cavity onto the first wall is located within the orthographic projection of the through hole onto the first wall.

13. The battery device according to claim 9, wherein, The second insulating member includes a fourth insulating portion and a fifth insulating portion arranged intersecting each other, the fourth insulating portion covering at least a portion of the first surface, and the fifth insulating portion covering at least a portion of the hole wall of the through hole.

14. The battery device according to any one of claims 9 to 13, wherein, The first insulating member, the second insulating member, and the thermal management component are all disposed overlapping the first wall portion of two or more of the battery cells.

15. The battery device according to any one of claims 1 to 14, wherein, The battery cell further includes an electrode terminal disposed on the first wall, the electrode terminal being electrically connected to the electrode assembly, the battery device further includes a busbar component, the busbar component being electrically connected to the electrode terminals of at least two of the battery cells, and the second insulating portion being located between the second surface and the busbar component.

16. The battery device according to any one of claims 1 to 15, wherein, The number of thermal management components is multiple, and the multiple battery cells are grouped into multiple battery cell assemblies. Each battery cell assembly includes two or more battery cells stacked together. Each battery cell assembly is provided with one thermal management component. The thermal management component is at least partially overlapped with the first wall of each battery cell in the same battery cell assembly. The thermal management component has two opposing second surfaces, and the first insulating member is provided on each of the second surfaces.

17. The battery device according to claim 16, wherein, The battery cell includes paired electrode terminals with opposite polarities, which are electrically connected to the electrode assembly. The paired electrode terminals are located on the same side of the housing, and each thermal management component is located between the paired electrode terminals of the same battery cell.

18. The battery device according to any one of claims 1 to 15, wherein, The number of thermal management components is multiple, and the multiple battery cells are grouped into multiple battery cell assemblies. Each battery cell assembly includes two or more battery cells stacked together. Each battery cell assembly is provided with two or more thermal management components. At least one thermal management component is at least partially overlapped with the first wall of each battery cell in two adjacent battery cell assemblies.

19. An electrical device comprising a battery device as described in any one of claims 1 to 18.

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