Battery devices and electrical appliances

Abstract

This application provides a battery device and an electrical device, belonging to the field of battery technology. The battery device includes: a housing, a battery cell pack, a heat exchanger, and a pressing member. The battery cell pack is housed within the accommodating cavity of the housing, and each battery cell pack includes multiple battery cells arranged along a first direction. The heat exchanger extends along the first direction and is located on the side of the battery cell pack. The pressing member extends along the first direction and is located on the top surface of the battery cell pack, and the pressing member is correspondingly connected to the heat exchanger. In the battery device of this application embodiment, connecting the pressing member to the heat exchanger can improve the rigidity of the pressing member, allowing it to better constrain the expansion of the battery cell pack along the first direction. With the increased rigidity, the thickness of the pressing member can be reduced accordingly, reducing its volume occupied within the housing and increasing the energy density of the battery device. In addition, the pressing member also functions as fins, increasing the heat dissipation area of ​​the heat exchanger, thereby improving the overall performance of the battery device.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to a battery device and an electrical device. Background Technology

[0002] Energy conservation and emission reduction are key to sustainable social development. Rechargeable batteries, with their ability to store and release energy as needed, are widely used in various electrical devices and energy storage systems, and are an important component in promoting energy transition and sustainable development. For the new energy industry, battery technology is a crucial factor in its development.

[0003] During charging and discharging, individual battery cells expand. The expansion force of these cells is borne by the battery casing, which may damage the casing and reduce the reliability of the battery system, thus affecting battery performance and lifespan. The charging and discharging performance of the battery system is also related to the temperature of the individual battery cells. If the temperature of the individual cells is too low, it will affect the storage and release of electrical energy; if the temperature of the individual cells is too high, there is a risk of thermal runaway, which not only seriously affects the normal performance of the battery but also threatens the safety and stability of the battery system. Utility Model Content

[0004] This application aims to at least address one of the technical problems existing in the background art. Therefore, one object of this application is to provide a battery device and an electrical device to improve the performance of the battery device.

[0005] An embodiment of the first aspect of this application provides a battery device, which includes: a housing, a battery cell group, a heat exchanger, and a pressing member. The housing has a receiving cavity; the battery cell group is housed in the receiving cavity, and each battery cell group includes a plurality of battery cells arranged along a first direction; the heat exchanger extends along the first direction and is located on the side of the battery cell group; the pressing member extends along the first direction and is located on the top surface of the battery cell group, and the pressing member is correspondingly connected to the heat exchanger.

[0006] In the technical solution of this application embodiment, the pressing member extends along the first direction and is located on the top surface of the battery cell assembly. It can constrain the expansion of the battery cell assembly along the first direction, reduce the probability of deformation of the housing, improve the reliability of the battery device, and thus improve the performance of the battery cells. The heat exchanger is located on the side of the battery cell assembly and can exchange heat for the entire battery cell assembly to maintain a relatively stable temperature of the battery cell assembly, thereby improving the safety and reliability of the battery device. The pressing member and the heat exchanger are connected to form a combined structure, so that the pressing member also acts as a fin, which can increase the heat dissipation area of ​​the heat exchanger and thus improve the heat dissipation efficiency of the battery cells. In addition, the heat exchanger can provide stable support for the pressing member, improve the rigidity of the pressing strip, and effectively improve the bending, torsion and deformation resistance of the pressing member, so that the pressing member is not prone to warping and displacement under force, thereby providing a more stable clamping force for the battery cell assembly. Therefore, compared to the independent setting of the pressing component, this application connects the pressing component with the heat exchange component, which significantly improves the overall rigidity and structural performance of the pressing component. As a result, the thickness of the pressing component can be reduced, which reduces the space occupied by the pressing component in the height direction of the housing, thereby reducing the size of the housing, increasing the energy density of the battery device, and further improving the performance of the battery device.

[0007] In some embodiments, the crimping member is connected to a portion of the top surface of the battery cell assembly. By connecting to the top surface of the battery cell assembly, the crimping member can form a fixed relationship with the battery cell assembly, thereby effectively constraining the expansion of the battery cell assembly along the first direction. At the same time, it can enhance the structural rigidity of the top of the battery cell, improve the assembly stability and vibration resistance of the battery cell assembly, and further improve the performance of the battery device.

[0008] In some embodiments, the housing further includes a limiting beam located within the accommodating cavity, the limiting beam being positioned along a first direction at least on one side of the battery cell pack, and the end of the pressing member limiting the beam along the first direction. The limiting beam also serves to restrict the expansion of the battery cell pack along the first direction, and the pressing member, connected to the limiting beam, can further enhance the effect of the pressing member in restricting the expansion of the battery cell pack along the first direction and further enhance its effect in restricting the displacement of the battery cell pack along the height direction by utilizing the rigidity of the limiting beam.

[0009] In some embodiments, the crimping member includes: a crimping body extending along a first direction and located on the top surface of the battery cell assembly; and an adapter connecting the end of the crimping body along the first direction and a limiting beam. The adapter connects the crimping body and the limiting beam, which can compensate for positional deviations, angular deviations, or dimensional deviations between the battery cell assembly and the limiting beam, reducing the difficulty of connection.

[0010] In some embodiments, the heat exchanger is a flexible heat exchanger. Flexible heat exchangers have good deformation adaptability, enabling them to closely conform to the sides of the battery cell assembly, reducing contact thermal resistance and improving heat exchange efficiency. For flexible heat exchangers, the pressing element can fix the flexible heat exchanger in place, reducing displacement and resulting in higher heat exchange efficiency between the flexible heat exchanger and the battery cell assembly.

[0011] In some embodiments, the heat exchanger is a rigid heat exchanger, and the rigid heat exchanger and the press-fit component are integrally formed. This improves the overall integrity and rigidity of the connection between the rigid heat exchanger and the press-fit component. Since no other connecting structure is used between them, stress concentration caused by the connecting structure is avoided to a certain extent, resulting in a more stable overall structure.

[0012] In some embodiments, the heat exchanger is a rigid heat exchanger, which is welded to the press-fit component. Welded connections have fewer limitations on the materials of the heat exchanger and the press-fit component, and are suitable for various types of sheet metal.

[0013] In some embodiments, the side of a battery cell includes a first surface and a second surface connected together. The first surface is located on one side of the battery cell along a first direction, and the area of ​​the first surface is larger than the area of ​​the second surface. The heat exchanger contacts the second surface. Since the press-fit component connects the heat exchanger and contacts the top surface of the battery cell assembly, the press-fit component also functions as a fin, increasing the heat dissipation area and improving the heat dissipation effect. Therefore, even though the heat exchanger contacts the second surface of the battery cell assembly, it can still achieve good heat dissipation. Furthermore, contact with a smaller surface of the battery cell assembly, compared to contact with a larger surface, reduces the volume of the heat exchanger, resulting in a smaller space occupied by the heat exchanger within the housing. This allows for a corresponding reduction in the volume of the housing, further increasing the energy density of the battery device.

[0014] In some embodiments, there are multiple battery cell groups arranged along a second direction perpendicular to the first direction. A heat exchanger is provided between each pair of adjacent battery cell groups, and the heat exchanger contacts the sides of the adjacent battery cell groups that are close to each other. Thus, one heat exchanger can simultaneously exchange heat with two battery cell groups, reducing the number of heat exchangers required, further freeing up space within the housing, and thereby further improving the energy density of the battery device.

[0015] In some embodiments, a crimping member is provided for each pair of adjacent battery cell groups, and the crimping member contacts the top surfaces of both adjacent battery cell groups. One crimping member can act on two battery cell groups simultaneously, reducing the total number of crimping members, further saving space inside the casing, and thus further improving the energy density of the battery device.

[0016] In some embodiments, when the heat exchanger is a flexible heat exchanger, the flexible heat exchanger includes: a heat exchanger body and a flange, with a heat exchange flow channel formed within the heat exchanger body; the flange is connected to the side of the heat exchanger body, and a press-fit member is connected to the flange. The connection between the flange and the press-fit member can reduce the impact on the heat exchange effect between the heat exchanger body and the battery cell assembly. Since the connection between the flange and the press-fit member does not involve the heat exchange between the heat exchanger body and the battery cell assembly, when designing the connection method between the flange and the press-fit member, there is no need to consider the structural limitations and heat exchange function requirements of the heat exchanger body. Diverse connection methods can be flexibly selected, thereby effectively improving the connection strength between the flange and the press-fit member and enhancing the overall structural connection stability.

[0017] In some embodiments, the heat exchanger body is configured to expand in volume when a heat exchange medium is introduced into the heat exchange channel, thereby forming an interference fit and contact with two adjacent battery cell groups. Since the press-fit member connects to the heat exchanger body via a flange, it can fix the position of the heat exchanger body. Furthermore, the heat exchanger body can achieve tight contact with the two battery cell groups through an interference fit when a heat exchange medium is introduced. Thus, no other connection means are required between the heat exchanger body and the battery cell groups, simplifying the assembly of the heat exchanger.

[0018] In some embodiments, the crimping member includes two crimping portions, which are respectively connected to two opposite sides of the flange, and each crimping portion contacts the top surface of two adjacent battery cell groups. This simplifies the connection between the crimping member and the heat exchanger, while the two crimping portions, each corresponding to a battery cell group, provide a better crimping effect on the battery cell groups.

[0019] In some embodiments, the crimping portion includes: a main structure and a connecting structure, the main structure being located on the top surface of the battery cell assembly and in contact with the top surface of the battery cell assembly; the connecting structure connecting the main structure is located on the side surface of the battery cell assembly and connected to the flange. By providing the main structure and the connecting structure, the two crimping portions can clamp the flange, thereby achieving a high connection strength between the crimping member and the heat exchanger.

[0020] In some embodiments, the housing includes an upper housing and a lower housing, which are closed to form an accommodating cavity. The bottom surface of the battery cell assembly is connected to the upper housing. The lower housing includes a base plate, and a gap is formed between the top surface of the battery cell assembly and the base plate. The battery device further includes a support member, which is positioned between the press-fit member and the base plate, and abuts against both the press-fit member and the base plate. Since the press-fit member contacts the top surface of the battery cell assembly, the support member positioned between the press-fit member and the base plate provides better support for the battery cells, reducing the likelihood of the battery cells contacting the base plate when inverted. Compared to a support member directly abutting between the top surface of the battery cell and the base plate, positioning the support member between the press-fit member and the base plate, and using the press-fit member to support the battery cells, reduces the thickness of the support member and allows one support member to support two adjacent battery cell assemblies. This reduces the size of the support member within the housing, thereby reducing the overall housing volume and increasing the energy density of the battery device. In addition, the support components are connected to the bottom plate of the lower housing, which can also improve the rigidity of the bottom plate, thereby improving the overall rigidity of the housing.

[0021] An embodiment of the second aspect of this application provides an electrical device that includes the battery device described in the above embodiments, the battery device being used to provide electrical energy.

[0022] 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

[0023] In the accompanying drawings, unless otherwise specified, the same reference numerals throughout the various drawings denote the same or similar parts or elements. These drawings are not necessarily drawn to scale. It should be understood that these drawings depict only some embodiments disclosed in this application and should not be construed as limiting the scope of this application.

[0024] Figure 1 This is a schematic diagram of the vehicle structure according to some embodiments of this application;

[0025] Figure 2 This is a schematic diagram of the internal structure of the box in some embodiments of this application;

[0026] Figure 3 This is a schematic diagram showing the relative positions of the battery cell assembly, the press-fitting component, the heat exchanger, and the limiting beam in some embodiments of this application.

[0027] Figure 4 for Figure 3 Corresponding top view structural diagram;

[0028] Figure 5 for Figure 4 A cross-sectional view along the AA direction;

[0029] Figure 6 for Figure 4 Cross-sectional view along the BB direction;

[0030] Figure 7 This is a schematic diagram showing the connection between the crimping member and the flexible heat exchanger in some embodiments of this application;

[0031] Figure 8 This is a schematic diagram showing the relative positions of the battery cell assembly, the press-fit member, the support member, and the bottom plate of the housing in some embodiments of this application.

[0032] Explanation of reference numerals in the attached figures:

[0033] Vehicle 1000, heat exchanger body 1011, flange 1012, crimping body 1021, adapter 1022;

[0034] Battery device 100, heat exchanger 101, crimping component 102, crimping part 102a, limiting beam 103, support component 104, base plate 121, controller 200, motor 300.

[0035] Box 10, upper box 11, lower box 12, battery cell 20, main structure 31, connecting structure 32;

[0036] First direction X, second direction Y. Detailed Implementation

[0037] 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.

[0038] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0039] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0040] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0041] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0042] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0043] 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," and "circumferential" 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 are not intended to 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.

[0044] In the description of the embodiments of this application, unless otherwise expressly specified and limited, 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.

[0045] Currently, the application of rechargeable batteries is becoming increasingly widespread, judging from market trends. They are not only used in energy storage systems for hydropower, thermal power, wind power, and solar power plants, but also extensively in various electronic devices, such as electric bicycles, electric motorcycles, and electric vehicles, as well as in military equipment and aerospace. As the application areas of rechargeable batteries continue to expand, the market demand is also constantly increasing.

[0046] During charging and discharging, individual battery cells expand. The expansion force of these cells is borne by the battery casing, which may damage the casing and reduce the reliability of the battery system, thus affecting battery performance and lifespan. The charging and discharging performance of the battery system is also related to the temperature of the individual battery cells. If the temperature of the individual cells is too low, it will affect the storage and release of electrical energy; if the temperature of the individual cells is too high, there is a risk of thermal runaway, which not only seriously affects the normal performance of the battery but also threatens the safety and stability of the battery system.

[0047] In related technologies, although cold plates are used to cool the battery cells and limiting structures are employed to constrain their expansion, improving the performance of the cold plates and limiting structures requires increasing their volume. In particular, the limiting structures need to be thickened to enhance their rigidity. This results in the cold plates and limiting structures occupying a large portion of the casing, necessitating a further increase in the overall casing volume. Consequently, this leads to lower energy density in the battery device, further impacting the performance of the individual battery cells.

[0048] Based on the above considerations, a battery device is designed, comprising: a housing, a battery cell assembly, a heat exchanger, and a pressing member. The housing has a receiving cavity; the battery cell assembly is housed within the receiving cavity, and each battery cell assembly includes multiple battery cells arranged along a first direction; the heat exchanger extends along the first direction and is located on the side of the battery cell assembly; the pressing member extends along the first direction and is located on the top surface of the battery cell assembly, and the pressing member is correspondingly connected to the heat exchanger.

[0049] The pressing component extends along the first direction and is located on the top surface of the battery cell assembly. It can constrain the expansion of the battery cell assembly along the first direction, reduce the probability of casing deformation, improve the reliability of the battery device, and thus improve the performance of the battery cells. The heat exchange component is located on the side of the battery cell assembly and can exchange heat for the entire battery cell assembly to maintain a relatively stable temperature, thereby improving the safety and reliability of the battery device. The pressing component and the heat exchange component are connected to form a combined structure, so that the pressing component also acts as fins, which can increase the heat dissipation area and thus improve the heat dissipation efficiency of the battery cells. In addition, the heat exchange component can provide stable support for the pressing component, improve the rigidity of the pressing strip, and effectively improve the bending, torsion, and deformation resistance of the pressing component, making it less prone to warping and displacement under force, thereby providing a more stable clamping force for the battery cell assembly. Therefore, compared to the independent setting of the pressing component, this application connects the pressing component with the heat exchange component, which significantly improves the overall rigidity and structural performance of the pressing component. As a result, the thickness of the pressing component can be reduced, which reduces the space occupied by the pressing component in the height direction of the housing, thereby reducing the size of the housing, increasing the energy density of the battery device, and further improving the performance of the battery device.

[0050] The battery cells disclosed in this application can be used, but are not limited to, in electrical devices or energy storage devices such as vehicles, ships, or aircraft. A power system comprising the battery cells and batteries disclosed in this application can be used to construct such an electrical device or energy storage device.

[0051] This application provides an electrical device that uses a battery as a power source. The electrical device can be, but is not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, spacecraft, etc. Electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0052] This application also provides an energy storage device that uses a battery as a power source. The energy storage device can be, but is not limited to, an energy storage container, an energy storage cabinet, an energy storage power station, an energy storage battery pack, or a portable energy storage system.

[0053] For ease of explanation, the following embodiments will be described using a vehicle 1000 as an example of an electrical device according to an embodiment of this application.

[0054] Please refer to Figure 1 , Figure 1This is a schematic diagram of the structure of a vehicle provided in some embodiments of this application. The vehicle 1000 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. A battery device 100 is installed inside the vehicle 1000, and the battery device 100 can be located at the bottom, front, or rear of the vehicle 1000. The battery device 100 can be used to power the vehicle 1000; for example, the battery device 100 can serve as the operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300. The controller 200 is used to control the battery device 100 to supply power to the motor 300, for example, to meet the power needs of the vehicle 1000 during starting, navigation, and driving.

[0055] In some embodiments of this application, the battery device 100 can not only serve as the operating power source for the vehicle 1000, but also as the driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0056] This application provides a battery device, which includes: a housing, a battery cell group, a heat exchanger, and a pressing member. The housing has a receiving cavity; the battery cell group is housed in the receiving cavity, and each battery cell group includes a plurality of battery cells arranged along a first direction; the heat exchanger extends along the first direction and is located on the side of the battery cell group; the pressing member extends along the first direction and is located on the top surface of the battery cell group, and the pressing member is correspondingly connected to the heat exchanger.

[0057] refer to Figures 2 to 4 In some embodiments, the housing 10 may include an upper housing and a lower housing, which overlap each other, together defining a cavity for accommodating the battery cell 20. The lower housing may be a hollow structure with one open end, and the upper housing may be a plate-like structure, with the upper housing covering the open side of the lower housing so that the upper and lower housings together define the cavity; alternatively, both the upper and lower housings may be hollow structures with one open end, with the open side of the upper housing covering the open side of the lower housing. Of course, the housing 10 formed by the upper and lower housings can be of various shapes, such as a cylinder, a cuboid, etc.

[0058] In the battery device 100, multiple battery cells 20 can be connected in series, parallel, or in a mixed configuration. A mixed configuration means that multiple battery cells 20 are connected in both series and parallel configurations. Multiple battery cells 20 can be directly connected in series, parallel, or in a mixed configuration, and then the entire assembly of the multiple battery cells 20 is housed within the housing 10. Alternatively, the battery device 100 can also consist of multiple battery cells 20 first connected in series, parallel, or in a mixed configuration to form battery modules, and then these battery modules are connected in series, parallel, or in a mixed configuration to form a whole, which is then housed within the housing 10. The battery device 100 may also include other structures; for example, it may include a busbar component for electrical connection between the multiple battery cells 20.

[0059] Each battery cell 20 can be a secondary battery or a primary battery; it can also be a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited to these. The battery cell 20 can be cylindrical, flat, cuboid, or other shapes.

[0060] In some embodiments, the number of battery cell packs can be one.

[0061] In other embodiments, the number of battery cell groups can also be multiple, and these multiple battery cell groups can be arranged along a second direction, which is perpendicular to the first direction. It is worth noting that, for ease of illustration of the structure of the pressing component and the heat exchanger, Figures 2 to 4 The diagram only shows one battery cell assembly and multiple pressing components and heat exchangers. Each pressing component and heat exchanger can have one battery cell assembly on one side.

[0062] refer to Figure 5 The phrase "heat exchanger 101 is located on the side of the battery cell group" means that the heat exchanger 101 is located on the side of each battery cell 20 in the battery cell group. The phrase "pressing member 102 is located on the top surface of the battery cell group" means that the pressing member 102 is located on the top surface of each battery cell 20 in the battery cell group. Specifically, the pressing member 102 may be located on a portion of the top surface of each battery cell 20 in the battery cell group, for example, it may be located on the shoulder of the battery cell 20.

[0063] It is understood that the extension direction of the heat exchanger 101 and the pressing member 102 is the same as the arrangement direction of the multiple battery cells 20 in the battery cell group. Therefore, the heat exchanger 101 is located on the side of the battery cell 20 perpendicular to the first direction X.

[0064] In some embodiments, the second direction Y is perpendicular to the first direction X, and the heat exchanger 101 is located on at least one of the two opposite sides of the battery cell 20 along the second direction Y. Exemplarily, in a plurality of battery cell groups, some battery cell groups have heat exchangers 101 on both sides along the second direction Y, while the remaining battery cell groups have heat exchangers 101 on one side along the second direction Y. Alternatively, each of the plurality of battery cell groups may have heat exchangers 101 on both sides along the second direction Y. The press-fitting member 102 is connected to the heat exchanger 101 in a one-to-one correspondence; that is, the number of press-fitting members 102 is the same as the number of heat exchangers 101, and at least one of the two shoulders of each battery cell group along the second direction Y may have a press-fitting member 102. The shoulder of the battery cell 20 may be the area on the top surface of the battery cell 20 located outside the positive and negative terminals. The top surface of the battery cell 20 may be the surface of the top cover of the battery cell 20 facing away from the bottom of the battery cell 20.

[0065] In some embodiments, the heat exchanger 101 may be attached to the side of the battery cell assembly. Attachment may involve no connection between the heat exchanger 101 and the battery cell assembly, but maintaining a tight fit; or the heat exchanger 101 and the battery cell assembly may be bonded together; or the heat exchanger 101 may be interference-fitted with two adjacent battery cell assemblies to attach to the side of the battery cell assembly.

[0066] In some embodiments, the heat exchanger 101 may be attached to at least a portion of at least one side of each battery cell 20 in the battery cell assembly along the second direction Y. Exemplarily, the height of the heat exchanger 101 along the height direction of the battery cell assembly may be less than or equal to the height of the battery cell 20. The height direction of the battery cell 20, the first direction X, and the second direction Y are mutually perpendicular.

[0067] The heat exchanger 101 has a heat exchange channel inside, which is used for the flow of heat exchange medium, which can heat or cool the battery cell 20.

[0068] The crimping member 102 is located on the top surface of the battery cell assembly and contacts the top surface of the battery cell assembly. It can also restrict the movement of the battery cell 20 along the height direction and improve the stability of the battery cell 20 in the box.

[0069] In some embodiments, the crimping member 102 is made of a metallic material, which improves the strength and rigidity of the crimping member 102, making it less prone to warping and displacement when subjected to the expansion force of the battery cell assembly along the first direction X. To avoid short circuits caused by the electrical connection between the crimping member 102 and the battery cell 20, the surface of the crimping member 102 that contacts the battery cell 20 can be an insulating surface.

[0070] In the above technical solution, the pressing member 102 extends along the first direction X and is located on the top surface of the battery cell assembly. It can constrain the expansion of the battery cell assembly along the first direction X, reduce the probability of deformation of the housing, improve the reliability of the battery device, and thus improve the performance of the battery cell 20. The heat exchanger 101 is located on the side of the battery cell assembly and can exchange heat for the entire battery cell assembly to maintain a relatively stable temperature of the battery cell assembly, thereby improving the safety and reliability of the battery device. The pressing member 102 is connected to the heat exchanger 101 to form a combined structure, so that the pressing member 102 also acts as a fin, which can increase the heat dissipation area and thus improve the heat dissipation efficiency of the battery cell 20. In addition, the heat exchanger 101 can provide stable support for the pressing member 102, improve the rigidity of the pressing strip, and effectively improve the bending, torsion and deformation resistance of the pressing member 102, so that the pressing member 102 is not prone to warping and displacement when subjected to force, thereby providing a more stable clamping force for the battery cell assembly. Therefore, compared to the independent setting of the crimping member 102, this application connects the crimping member 102 with the heat exchange member 101, which significantly improves the overall rigidity and structural performance of the crimping member 102. As a result, the thickness of the crimping member 102 can be reduced accordingly, thereby reducing the space occupied by the crimping member 102 in the height direction of the housing, thus reducing the size of the housing, increasing the energy density of the battery device, and further improving the performance of the battery device.

[0071] According to some embodiments of this application, the crimping member 102 is connected to a portion of the top surface of the battery cell assembly.

[0072] For example, the crimping member 102 is connected to the shoulder of the battery cell assembly, and the crimping member 102 may be bonded or welded to the shoulder of the battery cell assembly.

[0073] In the above technical solution, the crimping member 102 can form a fixed relationship with the battery cell group by connecting to the top surface of the battery cell group, thereby effectively constraining the expansion of the battery cell group along the first direction X, while enhancing the top structural rigidity of the battery cell 20, improving the assembly stability and vibration resistance of the battery cell group, and further improving the performance of the battery device.

[0074] refer to Figures 2 to 4 According to some embodiments of this application, the housing also has a limiting beam 103 located in the accommodating cavity, the limiting beam 103 being located on at least one side of the battery cell pack along the first direction X, and the end of the pressing member 102 connected to the limiting beam 103 along the first direction X.

[0075] In some embodiments, the material of the limiting beam 103 may include, but is not limited to, aluminum alloy, steel, copper, or copper alloy. These materials have high rigidity, enabling the limiting beam 103 to effectively restrict the expansion of the battery cell assembly in the first direction X.

[0076] In some embodiments, the limiting beam 103 may be an expansion beam.

[0077] For example, the crimping member 102 and the limiting beam 103 can be connected by at least one of the following methods: adhesive connection, bolt connection, riveting connection, welding, and snap-fit.

[0078] In some embodiments, when the crimping member 102 is connected to the limiting beam 103, the limiting beam 103 can also be connected to the top surface of the battery cell 20, for example, by adhesive bonding.

[0079] In some other embodiments, when the crimping member 102 is connected to the limiting beam 103, the limiting beam 103 may not be connected to the top surface of the battery cell 20.

[0080] In some embodiments, the battery device can be a module-less battery device, that is, the battery cell 20 is directly integrated into the housing, and there is no need to install module end plates, side plates or other parts in the housing. For example, the bottom of the battery cell 20 can be adhered to the inner wall of the housing.

[0081] In other embodiments, the battery cell 20 can also be assembled into a module and integrated into the housing using components such as module end plates.

[0082] like Figures 2 to 4 As shown, in some embodiments, the number of limiting beams 103 can be one, and the limiting beam 103 is located on one side of the battery cell pack along the first direction X.

[0083] In other embodiments, the number of limiting beams 103 may also be two, with the two limiting beams 103 arranged opposite each other along the first direction X, and the battery cell pack located between the two limiting beams 103. The two ends of the pressing member 102 along the first direction X are respectively connected to the two limiting beams 103.

[0084] In the above technical solution, the limiting beam 103 also plays the role of limiting the expansion of the battery cell pack along the first direction X. The pressing member 102 is connected to the limiting beam 103. With the rigidity of the limiting beam 103, the pressing member 102 can further improve the effect of limiting the expansion of the battery cell pack along the first direction X and further improve the effect of limiting the displacement of the battery cell pack along the height direction.

[0085] refer to Figure 2 , Figure 3 , Figure 4 as well as Figure 6 According to some embodiments of this application, the crimping member 102 includes a crimping body 1021 and an adapter 1022. The crimping body 1021 extends along a first direction X and is located on the top surface of the battery cell assembly. The adapter 1022 connects the end of the crimping body 1021 along the first direction X and the limiting beam 103.

[0086] The adapter 1022 is located on the top surface of the limiting beam 103 and the top surface of the pressing body 1021, and is connected to the limiting beam 103. The adapter 1022 and the limiting beam 103 can be connected by at least one of the following methods: adhesive connection, bolt connection, riveting connection, welding, and snap-fit ​​connection.

[0087] In some embodiments, the top surface of the battery cell 20 is lower than the top surface of the limiting beam, and the pressing body 1021 is located on the top surface of the battery cell 20, and the pressing body 1021 can be flush with the top surface of the limiting beam. In this way, the adapter 1022 is in a flat state when it is located on the top surface of the limiting beam 103 and the top surface of the pressing body 1021.

[0088] In some embodiments, the crimping body 1021 may be welded to the adapter 1022.

[0089] The materials of the crimping body 1021 and the adapter 1022 can be the same or different. The thicknesses of the crimping body 1021 and the adapter 1022 can be the same or different.

[0090] Both the crimping body 1021 and the adapter 1022 may be made of metal material, and the surface of the crimping body 1021 that contacts the battery cell 20 is an insulating surface, and the surface of the adapter 1022 that contacts the crimping body 1021 and the limiting beam 103 is an insulating surface.

[0091] For example, the crimping body 1021 may include a crimping strip and an insulating layer. The material of the crimping strip may be steel or the like. The insulating layer is in contact with the battery cell 20 and may be an insulating coating on the surface of the crimping strip.

[0092] In the above technical solution, the adapter 1022 connects the crimping body 1021 and the limiting beam 103, which can compensate for the positional deviation, angular deviation or dimensional deviation between the battery cell pack and the limiting beam 103, and reduce the connection difficulty.

[0093] According to some embodiments of this application, the heat exchanger 101 is a flexible heat exchanger.

[0094] The flexible heat exchanger is a heat exchanger 101 made of flexible materials or with a flexible structure design. The flexible heat exchanger has the ability to bend, fit, and deform. It can adapt to irregular curved surfaces, irregular installation spaces, or dynamic deformation conditions without damaging the structure and sealing performance. Heat transfer is achieved through the heat exchange medium in the internal heat exchange channel.

[0095] In some embodiments, the structure of the flexible heat exchanger may include, but is not limited to, one of the following: tube-embedded, fully flexible microchannel, filled, and composite laminated. For example, in a tube-embedded flexible heat exchanger, a flexible heat exchange tube is embedded in a flexible thermally conductive substrate. The flexible heat exchange tube can be a metal corrugated pipe, and the flexible thermally conductive substrate can be silicone rubber or a PI (Polyimide) coating. In a fully flexible microchannel flexible heat exchanger, the microchannel can be integrally molded using a polymer material. For example, at least one of PTFE (Polytetrafluoroethylene), PEEK (Polyetheretherketone), thermoplastic elastomers, etc., can be integrally molded into the microchannel. In a filled flexible heat exchanger, liquid metal or high thermal conductivity paste can be filled into the cavity of the flexible shell. The liquid metal can be a gallium-indium alloy, and the high thermal conductivity paste can be a graphite composite paste. In composite laminated flexible heat exchangers, multiple functional films can be laminated together through hot pressing, bonding, or lamination to form a flexible outer shell. A closed flow channel or heat exchange medium layer is integrated inside the flexible shell. For example, the flexible shell can consist of, from top to bottom: an outer protective layer, an upper sealing layer, a flow channel forming layer, a lower sealing layer, and a bottom protective layer. The outer protective layer can be a flexible, high-temperature resistant insulating film, such as polyimide, polyester film, or modified epoxy resin film. The upper sealing layer can be a flexible sealing film or a thin elastic adhesive layer, forming a closed cavity with the flow channel layer to prevent coolant leakage. The flow channel forming layer can be made of ultra-thin metal foil or a flexible polymer film, and can be formed into a continuous microchannel network through etching, stamping, or thermoforming. The lower sealing layer can enclose the closed flow channel cavity together with the upper sealing layer, and the bottom protective layer provides bottom insulation, wear resistance, and structural support.

[0096] In the above technical solution, the flexible heat exchanger has good deformation adaptability, can closely fit the side of the battery cell assembly, reduce contact thermal resistance, and improve heat exchange efficiency. For the flexible heat exchanger, the pressing member 102 can fix the flexible heat exchanger, reduce the displacement of the flexible heat exchanger, and make the heat exchange efficiency of the flexible heat exchanger for the battery cell assembly higher.

[0097] According to some embodiments of this application, the heat exchanger 101 is a rigid heat exchanger, and the rigid heat exchanger and the press-fitting member 102 are integrally formed.

[0098] A rigid heat exchanger refers to a plate-type heat exchange component made of rigid composite material, possessing overall rigidity and not exhibiting significant bending deformation under normal installation and operating loads. A rigid heat exchanger may include a substrate and heat exchange channels located within the substrate, with a heat exchange medium contained within the heat exchange channels. In some embodiments, the substrate material may include, but is not limited to, aluminum alloys, copper, and stainless steel.

[0099] In some embodiments, the rigid heat exchanger may be integrally extruded with the press-fit member 102.

[0100] In the above technical solution, the rigid heat exchanger can be integrally formed with the press-fit part 102, which improves the integrity of the connection between the rigid heat exchanger and the press-fit part 102 and the overall rigidity after the connection. Since no other connection structure is used to connect the two, stress concentration caused by the connection structure can be avoided to a certain extent, making the overall structure stronger and more stable.

[0101] According to some embodiments of this application, the heat exchanger 101 is a rigid heat exchanger, and the rigid heat exchanger is welded to the press-fit member 102.

[0102] For example, the rigid heat exchanger and the press-fit member 102 can be connected by a brazing process.

[0103] In the above technical solution, the welding connection has fewer restrictions on the materials of the heat exchanger 101 and the press-fitting part 102, and is suitable for various types of plates.

[0104] According to some embodiments of this application, the side of the battery cell 20 includes a first surface and a second surface connected together. The first surface is located on one side of the battery cell 20 along a first direction X. The area of ​​the first surface is larger than the area of ​​the second surface. The heat exchanger 101 is in contact with the second surface.

[0105] There are two first surfaces, which are arranged opposite each other along the first direction X. There are also two second surfaces, which are arranged opposite each other, and each second surface is connected to the two first surfaces on both sides.

[0106] In some embodiments, the second surface is located on one side of the battery cell 20 along the second direction Y.

[0107] The area of ​​the first surface is larger than the area of ​​the second surface; that is, the first surface is the larger surface of the battery cell 20. It is understood that the larger surface of the battery cell 20 is most prone to expansion during charging and discharging; that is, the battery cell assembly is prone to expansion in the first direction X. In this embodiment, a pressing member 102 is provided extending along the first direction X, so that the pressing member 102 can constrain the expansion of the battery cell assembly in the first direction X. Furthermore, when limiting beams 103 are provided, the two limiting beams 103 are arranged opposite each other along the first direction X, and the battery cell assembly is located between the two limiting beams 103. In this way, the limiting beams 103 can also restrict the expansion of the battery cell assembly in the first direction X.

[0108] Understandably, since the press-fit component 102 connects to the heat exchanger 101 and contacts the top surface of the battery cell assembly, it also functions as a fin, increasing the heat dissipation area and improving the heat dissipation effect. Therefore, even when the heat exchanger 101 contacts the second surface of the battery cell assembly, it still achieves good heat dissipation. Furthermore, contact with the smaller surface of the battery cell assembly, compared to contact with the larger surface, reduces the volume of the heat exchanger 101, thus occupying less space within the housing. This allows for a corresponding reduction in the overall housing volume, further increasing the energy density of the battery device.

[0109] refer to Figures 2 to 4 According to some embodiments of this application, there are multiple battery cell groups, which are arranged along a second direction Y, which is perpendicular to the first direction X; wherein, a heat exchanger 101 is provided between each two adjacent battery cell groups, and the heat exchanger 101 is in contact with the sides of the two adjacent battery cell groups that are close to each other.

[0110] The heat exchanger 101 has two opposing sides along the second direction Y, located on the sides of two adjacent battery packs that are close to each other. That is, two adjacent battery packs share one heat exchanger 101, thus reducing the number of heat exchangers 101 and decreasing the size of the housing occupied by them. In this case, the outermost two battery packs in a plurality of battery packs may not have heat exchangers 101 installed on their outer sides, further saving space within the housing. Alternatively, the outermost two battery packs in a plurality of battery packs may also have separate heat exchangers 101 installed on their outer sides, improving the temperature control effect on the battery cells 20.

[0111] In the above technical solution, one heat exchanger 101 can exchange heat with two battery cells at the same time, reducing the number of heat exchangers 101, further freeing up space inside the box, and thus further improving the energy density of the battery device.

[0112] In other embodiments, each battery cell group may also be provided with two heat exchangers 101, that is, the number of heat exchangers 101 is twice the number of battery cell groups. In this way, each battery cell group is provided with heat exchangers 101 on opposite sides along the second direction Y, and different battery cell groups are provided with different heat exchangers 101.

[0113] Continue to refer to Figures 2 to 4 According to some embodiments of this application, a crimping member 102 is provided for each pair of adjacent battery cell groups, and the crimping member 102 is in contact with the top surface of the two adjacent battery cell groups.

[0114] In some embodiments, the crimping member 102 may be located on the shoulder of two adjacent battery cell groups close to each other. That is, two adjacent battery cell groups share one crimping member 102, thus reducing the number of crimping members 102 and decreasing the size of the heat exchanger 101 occupying the housing. In this case, the outermost two battery cell groups may not have crimping members 102 on their outer sides, further saving space inside the housing. Alternatively, the outermost two battery cell groups may have separate crimping members 102 on their outer sides, further constraining the expansion of the battery cell groups along the first direction X.

[0115] In some embodiments, a heat exchanger 101 is provided between each pair of adjacent battery cell groups, and when the heat exchanger 101 is in contact with the sides of the two adjacent battery cell groups that are close to each other, the heat exchanger 101 and the crimping member 102 located between the adjacent battery cell groups are connected to each other. Exemplarily, the crimping member 102 and the heat exchanger 101 can be combined to form a "T" shaped structure.

[0116] In the above technical solution, one crimping member 102 can act on two battery cells at the same time, reducing the total number of crimping members 102, further saving space inside the box, and thus further improving the energy density of the battery device.

[0117] In other embodiments, each battery cell group may also have two crimping members 102, that is, the number of crimping members 102 is twice the number of battery cell groups. Thus, each battery cell group has crimping members 102 on opposite sides along the second direction Y, and different battery cell groups have different crimping members 102. The crimping members 102 and heat exchangers 101 located on the same side of the battery cell group can be connected. Exemplarily, the crimping members 102 and heat exchangers 101 can be combined to form an "L"-shaped structure.

[0118] refer to Figure 7 According to some embodiments of this application, when the heat exchanger 101 is a flexible heat exchanger, the flexible heat exchanger includes: a heat exchanger body 1011 and a flange 1012, a heat exchange flow channel is formed in the heat exchanger body 1011; the flange 1012 is connected to the side of the heat exchanger body 1011, and the pressing member 102 is connected to the flange 1012.

[0119] The structure of the heat exchanger body 1011 may include, but is not limited to, one of the following: tube-embedded, fully flexible microchannel, filled, or composite laminated. The relevant structure can be referred to the description of the above embodiments, and will not be repeated here.

[0120] The flange 1012 extends from the heat exchanger body 1011 in a direction away from the heat exchanger body 1011.

[0121] In some embodiments, the flange 1012 may connect to at least one side of the heat exchanger body 1011, for example, the flange 1012 may connect to the side of the heat exchanger body 1011 facing the crimping member 102.

[0122] In other embodiments, the flange 1012 may also be connected to the outer periphery of the heat exchanger body 1011.

[0123] In some embodiments, the flange 1012 and the heat exchanger body 1011 can be integrally formed.

[0124] In other embodiments, the flange 1012 may also be connected to the side of the heat exchanger 101 by means of bonding or other methods.

[0125] In some embodiments, the flange 1012 may be integrally hot-pressed or molded with the heat exchanger body 1011.

[0126] In some embodiments, the crimping member 102 may be bonded to the flange 1012.

[0127] In the above technical solution, the connection between the flange 1012 and the press-fit member 102 can reduce the impact on the heat exchange effect between the heat exchanger body 1011 and the battery cell group. Since the connection between the flange 1012 and the press-fit member 102 does not involve the heat exchange between the heat exchanger body 1011 and the battery cell group, when designing the connection method between the flange 1012 and the press-fit member 102, there is no need to consider the structural limitations and heat exchange function requirements of the heat exchanger body 1011. Various connection forms can be flexibly selected, thereby effectively improving the connection strength between the flange 1012 and the press-fit member 102 and improving the connection stability of the overall structure.

[0128] According to some embodiments of this application, the heat exchanger body 1011 is configured to expand in volume when a heat exchange medium is introduced into the heat exchange channel, so as to form an interference fit and contact with two adjacent battery cell groups.

[0129] Because the heat exchanger body 1011 is a flexible structure, when no heat exchange medium is introduced into the heat exchanger body 1011, the heat exchanger body 101 expands in volume, resulting in a smaller volume. In this case, the heat exchanger body 101 may not be completely tightly fitted with the two adjacent battery cell groups, and it is mainly fixed by the pressing member 102. When a heat exchange medium is introduced into the heat exchanger body 1011, the heat exchanger body 1011 deforms and expands, and its expanded size is slightly larger than the gap between the two adjacent battery cell groups. In this way, the heat exchanger body 1011 fills the gap by its own flexible deformation and generates a moderate and continuous elastic compressive force on the battery cell groups on both sides, so that the heat exchanger body 1011 and the two battery cell groups form a gapless fit.

[0130] In the above technical solution, since the crimping member 102 is connected to the heat exchanger body 1011 through the flange 1012, it can fix the position of the heat exchanger body 1011. The heat exchanger body 1011 can be tightly contacted with the two battery cells by interference fit when the heat exchange medium is introduced. In this way, no other connection means are needed between the heat exchanger body 1011 and the battery cells, which can simplify the assembly of the heat exchanger 101.

[0131] Continue to refer to Figure 7 According to some embodiments of this application, the crimping member 102 includes two crimping portions 102a, which are respectively connected to two opposite sides of the flange 1012, and the two crimping portions 102a respectively contact the top surfaces of two adjacent battery cell groups.

[0132] Two adjacent battery cell groups are arranged along the second direction Y. The flexible heat exchanger is located between the two adjacent battery cell groups. Two press-fit parts 102a can be connected to the two opposite sides of the flange 1012 along the second direction Y.

[0133] In some embodiments, the heat exchanger body 1011 of the flexible heat exchanger can be located on the side of the battery cell assembly, and the top surface of the flange 1012 can be higher than the top surface of the battery cell assembly, so that the crimping member 102 can connect to the flange 1012.

[0134] Of course, in other embodiments, the heat exchanger body 1011 and flange 1012 of the flexible heat exchanger may both be located on the side of the battery cell assembly.

[0135] The crimping part 102a can constitute the crimping body.

[0136] In the above technical solution, the crimping member 102 includes two crimping parts 102a, which are respectively connected to the flange 1012 and respectively contact the top surface of two adjacent battery cell groups. This simplifies the connection method between the crimping member 102 and the heat exchanger 101, while also providing a better crimping effect on the battery cell groups.

[0137] It is understood that in some embodiments, the crimping member 102 may also include only one crimping portion 102a, located on the top surface of two adjacent battery cell groups. The crimping member 102 may also include a connecting portion, the crimping portion 102a being connected to the top surface of the connecting portion, and the connecting portion being connected to the flange 1012. Exemplarily, the connecting portion may include two clamping arms arranged along a second direction Y, which can clamp the flange 1012. In one example, the two clamping arms can elastically deform along their arrangement direction to clamp the flange 1012 using elastic deformation. In another example, the two clamping arms may also be bonded to the flange 1012 to clamp the flange 1012.

[0138] Continue to refer to Figure 7 According to some embodiments of this application, the crimping part 102a includes: a main body structure 31 and a connecting structure 32. The main body structure 31 is located on the top surface of the battery cell assembly and contacts the top surface of the battery cell assembly; the connecting structure 32 is connected to the main body structure 31 and is located on the side of the battery cell assembly and connected to the flange 1012.

[0139] The main body structure 31 extends along a first direction X, and each main body structure 31 is located on the top surface of each battery cell 20 in the battery cell group. In some embodiments, the main body structure 31 may be located on the shoulder of the battery cell 20 and bonded to the shoulder of the battery cell 20.

[0140] Flange 1012 is located on the side of the battery cell assembly, and connecting structure 32 is also located on the side of the battery cell assembly to connect with flange 1012. Connecting structure 32 connects to one end of main structure 31 along the second direction Y and bends relative to the side of main structure 31 toward flange 1012. Exemplarily, connecting structure 32 and main structure 31 can form an "L" shape.

[0141] In some embodiments, the connecting structure 32 and the flange 1012 can be bonded together.

[0142] In some embodiments, the connecting structure 32 can be integrally formed with the main structure 31, for example, by integral extrusion molding or stamping molding.

[0143] In some embodiments, the main body structures 31 of the two crimping portions 102a are arranged side by side along the second direction Y, so that the two main body structures 31 can be located on the top surfaces of two adjacent battery cell groups respectively. The connecting structure 32 of the two crimping portions 102a is connected to the two main body structures 31 near each other's ends.

[0144] In some embodiments, in order to improve the connection strength between the crimping member 102 and the heat exchanger 101, the surfaces of the main structures 31 of the two crimping parts 102a that are close to each other can be bonded together.

[0145] In the above technical solution, by setting the main structure 31 and the connecting structure 32, the two pressing parts 102a can clamp the flange 1012, so that the connection strength between the pressing part 102 and the heat exchanger 101 is high.

[0146] refer to Figure 8 According to some embodiments of this application, the housing includes an upper housing 11 and a lower housing 12, which are closed to each other to form an accommodating cavity; wherein the bottom surface of the battery cell assembly is connected to the upper housing 11; the lower housing 12 includes a bottom plate 121, and a gap is formed between the top surface of the battery cell assembly and the bottom plate 121; the battery device further includes a support member 104, which is placed between the pressing member 102 and the bottom plate 121, and abuts against both the pressing member 102 and the bottom plate 121.

[0147] The crimping member 102 is located on the top surface of the battery cell 20 and faces the base plate 121. There is a gap between the crimping member 102 and the base plate 121. The support member 104 is located in the gap between the crimping member 102 and the base plate 121. In this way, the support member 104 can support the battery cell 20 through the crimping member 102, reducing the probability of the top surface of the battery cell 20 contacting the base plate 121.

[0148] In some embodiments, the terminal post of the battery cell 20 also protrudes from the top surface of the battery cell 20, and there is also a gap between the terminal post and the base plate 121. The support member 104 supports the battery cell 20 through the pressing member 102 so that a certain gap is maintained between the terminal post and the base plate 121, that is, the terminal post will not contact the base plate 121, reducing the compression and wear on the terminal post.

[0149] In some embodiments, the support member 104 extends along a first direction X.

[0150] In some embodiments, the support 104 may be a rigid structure.

[0151] In other embodiments, the support member 104 may also be a structure with a certain degree of elasticity.

[0152] In some embodiments, the surface of the support member 104 may be insulating to avoid interference with the circuitry within the battery device.

[0153] In some embodiments, the support member 104 may be bonded to the crimping member 102.

[0154] In some embodiments, the support member 104 may be bonded to the base plate 121.

[0155] It is understandable that, since both ends of the support member 104 abut against the pressing member 102 and the base plate 121, the support member 104 is difficult to move under the gravity of the battery cell assembly. Therefore, in some other embodiments, the support member 104 may not be connected to the pressing member 102 and the base plate 121.

[0156] In some embodiments, the bottom surface of each battery cell 20 in the battery cell group can be bonded to the upper housing 11.

[0157] In the above technical solution, since the pressing member 102 contacts the top surface of the battery cell assembly, a support member 104 is provided between the pressing member 102 and the base plate 121. This allows the pressing member 102 to provide better support for the battery cell 20, reducing the possibility of the battery cell 20 contacting the base plate 121 when inverted. Compared to the support member 104 directly abutting between the top surface of the battery cell 20 and the base plate 121, the support member 104 is positioned between the pressing member 102 and the base plate 121, using the pressing member 102 to support the battery cell 20. This reduces the thickness of the support member 104 and allows one support member 104 to support two adjacent battery cell assemblies, reducing the size occupied by the support member 104 within the housing, thereby reducing the housing volume and increasing the energy density of the battery device. Furthermore, the support member 104, connected to the base plate 121 of the lower housing 12, also increases the rigidity of the base plate 121, thus improving the overall rigidity of the housing.

[0158] This application provides an electrical device, which includes the battery device described in the above embodiments, and the battery device is used to provide electrical energy.

[0159] The structure of the battery device and the power supply device can be referred to the relevant description in the above embodiments, and will not be repeated here.

[0160] The technical solution of this application will be further described below with reference to a specific embodiment.

[0161] refer to Figures 2 to 8 The battery device includes: a housing, a battery cell assembly, a heat exchanger 101, and a crimping member 102. The housing has a receiving cavity; the battery cell assembly is housed in the receiving cavity, and each battery cell assembly includes a plurality of battery cells 20 arranged along a first direction X; the heat exchanger 101 extends along the first direction X and is located on the side of the battery cell assembly; the crimping member 102 extends along the first direction X and is located on the top surface of the battery cell assembly, and the crimping member 102 is correspondingly connected to the heat exchanger 101.

[0162] The side of the battery cell 20 includes a first surface and a second surface connected together. The first surface is located on one side of the battery cell 20 along the first direction X. The area of ​​the first surface is larger than the area of ​​the second surface. The heat exchanger 101 is in contact with the second surface.

[0163] The battery cell packs are multiple and arranged along a second direction Y, which is perpendicular to the first direction X. A heat exchanger 101 is provided between each pair of adjacent battery cell packs, and the heat exchanger 101 contacts the adjacent sides of the two battery cell packs. A pressing member 102 is provided between each pair of adjacent battery cell packs, and the pressing member 102 contacts the top surface of the two adjacent battery cell packs.

[0164] For example, the crimping member 102 can be bonded to the shoulder of the battery cell assembly.

[0165] Exemplarily, the housing also has two limiting beams 103 located within the accommodating cavity. The two limiting beams 103 are arranged opposite each other along a first direction X. The battery cell assembly is located between the two limiting beams 103. The two ends of the crimping member 102 along the first direction X are respectively connected to the two limiting beams 103. The crimping member 102 includes a crimping body 1021 and an adapter 1022. The crimping body 1021 extends along the first direction X and is located at the shoulder of the battery cell assembly. The adapter 1022 connects the end of the crimping body 1021 along the first direction X and the limiting beams 103. The adapter 1022 is located on the top surface of the crimping body 1021 and the top surface of the limiting beams 103. The adapter 1022 is adhesively connected to the crimping body 1021 and bolted to the limiting beams 103.

[0166] For example, the heat exchanger 101 can be a flexible heat exchanger, which includes a heat exchanger body 1011 and a flange 1012. A heat exchange channel is formed within the heat exchanger body 1011, and the flange 1012 is connected to the side of the heat exchanger body 1011. A pressing member 102 is connected to the flange 1012. The heat exchanger body 1011 is configured to expand in volume when a heat exchange medium is introduced into the heat exchange channel, so as to form an interference fit and contact with two adjacent battery cell groups. The pressing member 102 may include two pressing portions 102a, which are respectively connected to the back surfaces of the flange 1012 that are opposite to each other, and the two pressing portions 102a respectively contact the top surfaces of two adjacent battery cell groups. The crimping portion 102a may include a main body structure 31 and a connecting structure 32. The main body structure 31 extends along a first direction X and is located at the shoulder of the battery cell assembly. The connecting structure 32 extends along the first direction X and connects to the main body structure 31. The connecting structure 32 is located on the side of the battery cell assembly to connect with the flange 1012. The connecting structure 32 is bent relative to the main body structure 31 toward the side where the flange 1012 is located, and the connecting structure 32 and the main body structure 31 can form an "L" shape.

[0167] For example, the heat exchanger 101 can also be a rigid heat exchanger, which can be integrally formed with the press-fit member 102 or brazed to the press-fit member 102. The rigid heat exchanger can be a rigid heat exchange plate. The rigid heat exchanger can be integrally extruded with the press-fit member 102, and the rigid heat exchanger is connected to the bottom of the press-fit member 102 to form a "T" shaped structure together.

[0168] The housing may include an upper housing 11 and a lower housing 12, which are closed to form a cavity. The bottom surface of the battery cell assembly is connected to the upper housing 11. The lower housing 12 includes a bottom plate 121. A gap is formed between the top surface of the battery cell assembly and the bottom plate 121. The battery device also includes a support member 104, which is placed between the pressing member 102 and the bottom plate 121 and abuts against both the pressing member 102 and the bottom plate 121.

[0169] 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, characterized by, include: The enclosure has a receiving cavity; A battery cell assembly is housed within the accommodating cavity, and each battery cell assembly includes a plurality of battery cells arranged along a first direction. A heat exchanger extends along the first direction and is located on the side of the battery cell assembly; A crimping member extends along the first direction and is located on the top surface of the battery cell assembly, and the crimping member is correspondingly connected to the heat exchanger.

2. The battery device according to claim 1, characterized by The press-fit component is connected to a portion of the top surface of the battery cell assembly.

3. The battery device of claim 1, wherein The housing also has a limiting beam located within the accommodating cavity, the limiting beam being located on at least one side of the battery cell assembly along the first direction, and the end of the pressing member connected to the limiting beam along the first direction.

4. The battery device of claim 3, wherein The crimping member includes: A crimping body, which extends along the first direction and is located on the top surface of the battery cell assembly; The adapter connects the end of the crimping body along the first direction to the limiting beam.

5. The battery device of claim 1, wherein The heat exchanger is a flexible heat exchanger.

6. The battery device of claim 1, wherein The heat exchanger is a rigid heat exchanger, and the rigid heat exchanger and the pressing member are integrally formed.

7. The battery device of claim 1, wherein The heat exchanger is a rigid heat exchanger, and the rigid heat exchanger is welded to the press-fitting component.

8. The battery device of claim 1, wherein The side of the battery cell includes a first surface and a second surface connected together. The first surface is located on one side of the battery cell along the first direction. The area of ​​the first surface is larger than the area of ​​the second surface. The heat exchanger is in contact with the second surface.

9. The battery device according to any one of claims 1 to 8, characterized by, The number of battery cell groups is multiple, and these multiple battery cell groups are arranged along a second direction, which is perpendicular to the first direction; wherein... A heat exchanger is provided between each pair of adjacent battery cells, and the heat exchanger is in contact with the sides of the two adjacent battery cells that are close to each other.

10. The battery device according to claim 9, characterized in that, One crimping member is provided for each pair of adjacent battery cells, and the crimping member is in contact with the top surface of the two adjacent battery cells.

11. The battery device according to claim 10, characterized in that, When the heat exchanger is a flexible heat exchanger, the flexible heat exchanger includes: A heat exchanger body, wherein a heat exchange flow channel is formed within the heat exchanger body; A flange is connected to the side of the heat exchanger body, and a crimping member is connected to the flange.

12. The battery device according to claim 11, characterized in that, The heat exchanger body is configured to expand in volume when a heat exchange medium is introduced into the heat exchange channel, so as to form an interference fit and contact with two adjacent battery cell groups.

13. The battery device according to claim 11, characterized in that, The crimping member includes two crimping portions, which are respectively connected to the two opposite sides of the flange, and each of the two crimping portions contacts the top surface of two adjacent battery cell groups.

14. The battery device according to claim 13, characterized in that, The crimping portion includes: The main structure is located on the top surface of the battery cell assembly and is in contact with the top surface of the battery cell assembly. A connecting structure is provided to connect the main structure. The connecting structure is located on the side of the battery cell assembly and connected to the flange.

15. The battery device according to any one of claims 1-8, characterized in that, The enclosure includes an upper enclosure and a lower enclosure, the upper enclosure and the lower enclosure being fitted together to form the receiving cavity; wherein... The bottom surface of the battery cell assembly is connected to the upper housing; The lower housing includes a bottom plate, and a gap is formed between the top surface of the battery cell assembly and the bottom plate; The battery device also includes: A support member is placed between the pressing member and the base plate, and abuts against both the pressing member and the base plate.

16. An electrical appliance, characterized in that, The electrical device includes the battery device according to any one of claims 1-15, the battery device being used to provide electrical energy.

Images