Battery devices, electrical equipment, energy storage devices, energy storage systems and charging networks

Abstract

This application provides a battery device, electrical equipment, energy storage device, energy storage system, and charging network. The battery device includes a battery cell assembly and a housing. The housing includes a heat exchanger and a frame. The heat exchanger supports the battery cell assembly, and the frame includes a first side beam disposed on one side of the battery cell assembly along a second direction. The first side beam includes a first beam body and a first support portion, which supports the heat exchanger. A first connection space is provided between the heat exchanger and the first side beam. The first connection space includes a first connection gap, a first connection groove, and a second connection groove. Along the first direction, the first connection gap is disposed between the heat exchanger and the first support portion, and the first and second connection grooves are respectively disposed on opposite sides of the first connection gap along the second direction. The battery device provided by this application effectively improves the structural strength of the housing and enhances the safety performance of the battery device by optimizing the stress structure and connection structure between the heat exchanger and the frame.

Description

Technical Field

[0001] This application belongs to the field of battery technology, and more specifically, relates to a battery device, electrical equipment, energy storage device, energy storage system and charging network. Background Technology

[0002] Energy conservation and emission reduction are key to the sustainable development of the automotive industry. In this context, electric vehicles, due to their energy-saving and environmentally friendly advantages, have become an important component of the automotive industry's sustainable development. And for electric vehicles, battery technology is a crucial factor in their development.

[0003] In the development of battery technology, besides improving the performance of battery devices, safety is also a crucial issue. The structural strength of the battery pack casing plays a key role in the safety performance of the battery device. Therefore, improving the structural strength of the battery pack casing has become a particularly important issue in the development of battery technology. Utility Model Content

[0004] The purpose of this application is to provide a battery device, electrical equipment, energy storage device, energy storage system, and charging network to solve the technical problem of low structural strength of the battery device housing in related technologies.

[0005] To achieve the above objectives, the technical solution adopted in this application embodiment is as follows: a battery device is provided, including a battery cell assembly and a housing; the housing has a receiving space for accommodating the battery cell assembly, the housing includes a heat exchanger for heat exchange with the battery cell assembly and a frame for defining the receiving space, the heat exchanger is disposed on one side of the battery cell assembly along a first direction to support the battery cell assembly, the frame includes a first side beam disposed on one side of the battery cell assembly along a second direction, the second direction being perpendicular to the first direction, the first side beam including a first beam body and a first support portion, the first support portion protruding from the side of the first beam body facing the battery cell assembly and used to support the heat exchanger; wherein, a first connection space for filling a connection medium is provided between the heat exchanger and the first side beam, the first connection space including a first connection gap, a first connection groove and a second connection groove, along the first direction, the first connection gap is disposed between the heat exchanger and the first support portion, the first connection groove and the second connection groove are respectively disposed on opposite sides of the first connection gap along the second direction and communicate with the first connection gap.

[0006] The battery device provided in this application embodiment has at least the following beneficial effects: The heat exchanger in the battery device provided in this application embodiment is used to support the battery cell assembly, and the first support part is used to support the heat exchanger, so that the gravity load of the heat exchanger can be directly transferred to the frame, and the gravity load of the battery cell assembly can be transferred to the frame through the heat exchanger. That is, the frame can simultaneously bear the gravity load of the heat exchanger and the gravity load of the battery cell assembly, effectively improving the stress concentration at the connection between the heat exchanger and the frame. At the same time, by setting the first connection gap between the heat exchanger and the first support part, and setting the first connection groove and the second connection groove on opposite sides of the first connection gap along the second direction, after the first connection gap, the first connection groove and the second connection groove are fully filled with the connecting medium, the connection area of ​​the connecting medium between the heat exchanger and the first side beam is effectively increased. Meanwhile, the connecting medium located in the first connection groove and the second connection groove can effectively resist the shear stress along the second direction, thereby effectively improving the connection strength between the heat exchanger and the first side beam, and effectively limiting the relative position of the heat exchanger and the frame along the first direction and the second direction. In this way, by optimizing the stress structure and connection structure between the heat exchanger and the frame, the connection strength between the heat exchanger and the frame can be effectively improved, thereby effectively improving the structural strength of the housing and effectively enhancing the safety performance of the battery device.

[0007] In some embodiments of this application, the dimension of the first connecting gap along the first direction is 0.1mm-0.5mm; and / or, the dimension of the first connecting groove along the first direction is 1mm-5mm; and / or, the dimension of the second connecting groove along the first direction is 1mm-5mm.

[0008] By adopting the above technical solution, on the one hand, under the premise that the connecting medium can effectively connect the heat exchanger and the first support, the amount of material used in the connecting medium can be reduced, and the material cost of the connecting medium can be reduced; on the other hand, the dimensions of the first connecting groove along the first direction and the dimensions of the second connecting groove along the first direction can both be larger than the dimensions of the first connecting gap along the first direction. After the connecting medium is fully filled in the first connecting gap, the first connecting groove and the second connecting groove, the connecting medium located in the first connecting groove and the connecting medium located in the second connecting groove protrude along the first direction relative to the connecting medium located in the first connecting gap, which effectively increases the connection area of ​​the connecting medium between the heat exchanger and the first side beam, enhances the shear resistance and peel resistance of the connecting medium, and further improves the connection strength between the heat exchanger and the frame.

[0009] In some embodiments of this application, the dimension of the first connecting gap along the second direction is 12mm-25mm; and / or, the dimension of the first connecting groove along the second direction is 5mm-10mm; and / or, the dimension of the second connecting groove along the second direction is 5mm-10mm.

[0010] By adopting the above technical solution, the dimension of the first connection gap along the second direction can be made larger than the dimension of the first connection groove along the second direction and the dimension of the second connection groove along the second direction, so that the middle part of the connection medium extends along the second direction, effectively increasing the connection area of ​​the connection medium between the heat exchanger and the first side beam, effectively limiting the relative position of the heat exchanger and the frame along the first and second directions, thereby further improving the connection strength between the heat exchanger and the frame.

[0011] In some embodiments of this application, the heat exchanger faces the side of the first beam along the second direction, and the first beam and the first support portion enclose each other to form a first connecting groove; and / or, the first support portion is recessed on the side away from the first beam along the second direction to form a second connecting groove.

[0012] By adopting the above technical solution, it is easy to form a first connecting groove and a second connecting groove between the heat exchanger and the first side beam. The structure is simple and easy to implement.

[0013] In some embodiments of this application, the frame includes two first side beams, which are respectively disposed on opposite sides of the battery cell assembly along the second direction.

[0014] By adopting the above technical solution, the forces on the two sides of the heat exchanger along the second direction can be made more balanced, further improving the stress concentration of the heat exchanger, thereby effectively reducing the risk of torsional deformation of the heat exchanger and further improving the structural strength of the housing.

[0015] In some embodiments of this application, the first connection space is used to fill the adhesive medium.

[0016] By adopting the above technical solution, not only can the connection process between the heat exchanger and the first side beam be simplified, but the connection force between the heat exchanger and the first side beam can also be made more uniform, further improving the connection strength between the heat exchanger and the first side beam. In addition, it can effectively seal the gap between the heat exchanger and the first side beam, effectively improving the sealing performance of the box.

[0017] In some embodiments of this application, the first connection gap includes two first regions and a second region disposed between the two first regions along a second direction. The first regions are used to fill the connection medium. The first connection groove is connected to one of the first regions, and the second connection groove is connected to the other first region. The heat exchanger and the first support are welded to each other in the second region.

[0018] By adopting the above technical solution, on the one hand, the connecting medium can effectively seal the gap between the heat exchanger and the first side beam, effectively improving the sealing performance of the housing; on the other hand, the heat exchanger and the first support are not only connected by the connecting medium, but also welded to each other, further improving the connection strength between the heat exchanger and the first side beam, thereby further improving the structural strength of the housing and further enhancing the safety performance of the battery device.

[0019] In some embodiments of this application, the frame further includes a second side beam disposed on one side of the battery cell assembly along a third direction, the third direction being perpendicular to the first and second directions. The second side beam includes a second beam body and a second support portion. The second support portion protrudes from the side of the second beam body facing the battery cell assembly and is used to support the heat exchanger. A second connection space for filling a connection medium is provided between the heat exchanger and the second side beam. The second connection space includes a second connection gap, a third connection groove, and a fourth connection groove. Along the first direction, the second connection gap is disposed between the heat exchanger and the second support portion. The third connection groove and the fourth connection groove are disposed on opposite sides of the second connection gap along the third direction and communicate with the second connection gap.

[0020] By adopting the above technical solution, the frame can simultaneously support the heat exchanger on both the side along the second direction and the side along the third direction, further optimizing the stress structure and connection structure between the heat exchanger and the frame, further improving the connection strength between the heat exchanger and the frame, thereby further improving the structural strength of the housing and further enhancing the safety performance of the battery device.

[0021] In some embodiments of this application, the second connecting gap is 0.1mm-0.5mm in the first direction; and / or, the third connecting groove is 1mm-5mm in the first direction; and / or, the fourth connecting groove is 1mm-5mm in the first direction.

[0022] By adopting the above technical solution, on the one hand, under the premise that the connecting medium can effectively connect the heat exchanger and the second support, the amount of material used in the connecting medium can be reduced, and the material cost of the connecting medium can be reduced; on the other hand, the dimensions of the third connecting groove along the first direction and the fourth connecting groove along the first direction can be made larger than the dimensions of the second connecting gap along the first direction. After the connecting medium is fully filled in the second connecting gap, the third connecting groove and the fourth connecting groove, the connecting medium located in the third connecting groove and the connecting medium located in the fourth connecting groove protrude along the first direction relative to the connecting medium located in the second connecting gap, which effectively increases the connection area of ​​the connecting medium between the heat exchanger and the second side beam, enhances the shear resistance and peel resistance of the connecting medium, and thus further improves the connection strength between the heat exchanger and the frame.

[0023] In some embodiments of this application, the second connecting gap is 12mm-25mm in the third direction; and / or, the third connecting groove is 5mm-10mm in the third direction; and / or, the fourth connecting groove is 5mm-10mm in the third direction.

[0024] By adopting the above technical solution, the dimension of the second connection gap along the third direction can be greater than the dimensions of the third connection groove and the fourth connection groove along the third direction, so that the middle part of the connection medium extends along the third direction, effectively increasing the connection area of ​​the connection medium between the heat exchanger and the second side beam, effectively limiting the relative position of the heat exchanger and the frame along the first direction and the third direction, thereby further improving the connection strength between the heat exchanger and the frame.

[0025] In some embodiments of this application, the heat exchanger is provided with a third connecting groove formed by the side of the heat exchanger facing the second beam in a third direction, the second beam and the second support portion; and / or, the second support portion is recessed with a fourth connecting groove in a third direction away from the second beam.

[0026] By adopting the above technical solution, it is easy to form a third and a fourth connecting groove between the heat exchanger and the second side beam. The structure is simple and easy to implement.

[0027] In some embodiments of this application, the frame includes two second side beams, which are respectively disposed on opposite sides of the battery cell assembly along a third direction.

[0028] By adopting the above technical solution, the stress on the two sides of the heat exchanger along the third direction can be made more balanced, which further improves the stress concentration of the heat exchanger, thereby effectively reducing the risk of torsional deformation of the heat exchanger and further improving the structural strength of the box.

[0029] In some embodiments of this application, the second connection space is used to fill the adhesive medium.

[0030] By adopting the above technical solution, not only can the connection process between the heat exchanger and the second side beam be simplified, but the connection stress between the heat exchanger and the second side beam can also be made more uniform, further improving the connection strength between the heat exchanger and the second side beam. In addition, it can effectively seal the gap between the heat exchanger and the second side beam, effectively improving the sealing performance of the box.

[0031] In some embodiments of this application, the second connection gap includes two third regions and a fourth region disposed between the two third regions along a third direction. The third regions are used to fill the connection medium. The third connection groove is connected to one of the third regions, and the fourth connection groove is connected to the other third region. The heat exchanger and the second support are welded to each other in the fourth region.

[0032] By adopting the above technical solution, on the one hand, the connecting medium can effectively seal the gap between the heat exchanger and the second side beam, effectively improving the sealing performance of the housing; on the other hand, the heat exchanger and the second support are not only connected by the connecting medium, but also welded to each other, further improving the connection strength between the heat exchanger and the second side beam, thereby further improving the structural strength of the housing and further enhancing the safety performance of the battery device.

[0033] In some embodiments of this application, the heat exchanger includes a support plate and a flow channel plate. The flow channel plate includes a plurality of first plates, each having at least one heat exchange flow channel. The plurality of first plates are stacked on the support plate and are separated along a direction perpendicular to the length direction of the heat exchange flow channel.

[0034] By adopting the above technical solution, on the one hand, dividing the flow channel plate into multiple separately arranged first plates can reduce the amount of material used in the heat exchange components, thereby effectively reducing the weight of the heat exchange components and improving the mass energy density of the battery device; on the other hand, it allows the heat exchange channels in each first plate to flow the heat exchange medium independently, improving the thermal crosstalk between the heat exchange channels, thereby effectively improving the temperature consistency of the battery cell assembly and further enhancing the safety performance of the battery device.

[0035] In some embodiments of this application, the flow channel plate further includes a second plate body, and a plurality of first plates body are connected to the second plate body. The second plate body has a first confluence flow channel and a second confluence flow channel. The first plate body also has an inlet end and an outlet end that are connected to the heat exchange flow channel. The inlet ends of the plurality of first plates body are all connected to the first confluence flow channel, and the outlet ends of the plurality of first plates body are all connected to the second confluence flow channel.

[0036] By adopting the above technical solution, the flow channel structure of the heat exchanger is effectively optimized, the thermal crosstalk between the various heat exchange channels is further improved, thereby further enhancing the temperature consistency of the battery cell assembly and further improving the safety performance of the battery device.

[0037] In some embodiments of this application, the second direction is parallel to the length direction of the heat exchange channel.

[0038] By adopting the above technical solution, the first support part supports the side of the heat exchange component along the second direction, which can play a reinforcing role for the heat exchange component, help share the gravity load of the battery cell assembly, reduce the risk of deformation of the heat exchange component, thereby further improving the structural strength of the housing and further enhancing the safety performance of the battery device.

[0039] In some embodiments of this application, the surface of the support plate facing the battery cell assembly along the first direction is a plane, and the flow channel plate is stacked on the surface of the support plate facing away from the battery cell assembly along the first direction.

[0040] By adopting the above technical solution, the flatness of the surface of the heat exchanger facing the battery cell assembly is improved, which allows the support plate to fit closely with the bottom surface of the battery cell, thereby increasing the contact area between the heat exchanger and the battery cell assembly, improving the heat exchange effect between the heat exchanger and the battery cell assembly, and further enhancing the safety performance of the battery device.

[0041] In some embodiments of this application, the housing further includes a protective member disposed on the side of the heat exchange member facing away from the battery cell assembly along a first direction, and the protective member is connected to the frame.

[0042] By adopting the above technical solutions, the protective components can protect the heat exchange components and battery cell assemblies from mechanical damage such as impacts, scratches, and gravel impacts from below the housing, thereby improving the rigidity and impact resistance of the housing and further enhancing the safety performance of the battery device.

[0043] In some embodiments of this application, the protective component further includes a protective body and a support body. The protective body is disposed on the side of the heat exchange component facing away from the battery cell assembly along the first direction. The protective body is connected to the frame, and the support body abuts against the protective body and the heat exchange component.

[0044] By adopting the above technical solution, the support body can provide additional support points for the heat exchange components, help share the gravity load of the battery cell assembly, reduce the risk of deformation of the heat exchange components, thereby further improving the structural strength of the housing and further enhancing the safety performance of the battery device.

[0045] Secondly, embodiments of this application provide an electrical device including a battery device as described in any of the above embodiments.

[0046] The electrical equipment provided in this application embodiment has at least the following beneficial effects: the electrical equipment provided in this application embodiment effectively improves the safety performance of the electrical equipment by adopting the battery device as described in any of the above embodiments.

[0047] Thirdly, embodiments of this application provide an energy storage device, including a battery device as described in any of the above embodiments.

[0048] The energy storage device provided in this application embodiment has at least the following beneficial effects: the energy storage device provided in this application embodiment effectively improves the safety performance of the energy storage device by adopting the battery device as described in any of the above embodiments.

[0049] Fourthly, embodiments of this application provide an energy storage system, including the energy storage device as described in any of the above embodiments.

[0050] The energy storage system provided in this application embodiment has at least the following beneficial effects: the energy storage system provided in this application embodiment effectively improves the safety performance of the energy storage system by adopting the energy storage device as described in any of the above embodiments.

[0051] Fifthly, embodiments of this application provide a charging network including an energy storage device as described in any of the above embodiments.

[0052] The charging network provided in this application embodiment has at least the following beneficial effects: the charging network provided in this application embodiment effectively improves the safety performance of the charging network by adopting the energy storage device as described in any of the above embodiments. Attached Figure Description

[0053] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0054] Figure 1 This is a schematic diagram of the energy storage system provided in the embodiments of this application;

[0055] Figure 2 This is a schematic diagram of the structure of the charging network provided in an embodiment of this application;

[0056] Figure 3 This is a schematic diagram of the vehicle structure provided in an embodiment of this application;

[0057] Figure 4 This is an exploded structural diagram of the battery device provided in the embodiments of this application;

[0058] Figure 5 for Figure 4 An exploded structural diagram of the housing in the battery device shown.

[0059] Figure 6 for Figure 5 A top view of the casing in the battery device shown.

[0060] Figure 7 for Figure 6 The diagram shows a cross-sectional view of the box along line AA.

[0061] Figure 8 for Figure 7 A magnified structural diagram of section B of the box shown;

[0062] Figure 9 for Figure 6The diagram shows a cross-sectional view of the box along the CC line.

[0063] Figure 10 for Figure 9 A magnified structural diagram of point D of the box shown;

[0064] Figure 11 for Figure 6 The diagram shows a cross-sectional view of the box along line EE.

[0065] Figure 12 for Figure 11 Enlarged structural diagram of point F of the box shown;

[0066] Figure 13 for Figure 6 The diagram shows a cross-sectional view of the box along line GG.

[0067] Figure 14 for Figure 13 A magnified structural diagram of section H of the box shown;

[0068] Figure 15 for Figure 4 The diagram shows a bottom view of the heat exchanger in the battery device.

[0069] The following are the labeling elements in the figure:

[0070] 1000, vehicles;

[0071] 100. Battery device;

[0072] 10. Battery cell assembly; 11. Battery cell;

[0073] 20. Housing; 21. Accommodation space; 22. Heat exchanger; 221. Support plate; 222. Flow channel plate; 2221. First plate; 22211. Heat exchange flow channel; 2222. Second plate; 22221. First confluence flow channel; 22222. Second confluence flow channel; 23. Frame; 231. First side beam; 2311. First beam; 2312. First support; 232. Second side beam; 2321. Second beam; 2322. Second support; 24. First connecting space; 241. First connecting gap; 2411. First region; 2412. Second region; 242. First connecting groove; 243. Second connecting groove; 25. Second connecting space; 251. Second connecting gap; 2511. Third region; 2512. Fourth region; 252. Third connecting groove; 253. Fourth connecting groove; 26. Protective components; 261. Protective body; 262. Support structure; 27. Structural beam; 28. Connecting medium;

[0074] 30. Box lid;

[0075] 200. Controller;

[0076] 300. Motor;

[0077] 1. Energy storage device; 2. Energy conversion system; 3. Power generation equipment; 4. Charging pile; 5. Connector. Detailed Implementation

[0078] 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.

[0079] 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.

[0080] Unless otherwise specified, all embodiments and optional embodiments of this application can be combined to form new technical solutions.

[0081] Unless otherwise specified, all technical features and optional technical features of this application may be combined to form new technical solutions.

[0082] Unless otherwise specified, all steps of this application may be performed sequentially or randomly, preferably sequentially. For example, the method includes steps (a) and (b), indicating that the method may include steps (a) and (b) performed sequentially, or it may include steps (b) and (a) performed sequentially. For example, the mention that the method may also include step (c) indicates that step (c) may be added to the method in any order; for example, the method may include steps (a), (b), and (c), or it may include steps (a), (c), and (b), or it may include steps (c), (a), and (b), etc.

[0083] 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.

[0084] 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.

[0085] 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.

[0086] 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).

[0087] 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.

[0088] 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.

[0089] Currently, judging from market trends, the application of battery devices is becoming increasingly widespread. Battery devices are not only used in energy storage power systems such as hydropower, thermal power, wind power, and solar power plants, but also widely applied in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in military equipment and aerospace, among other fields.

[0090] A battery device typically includes a battery cell assembly and a housing. The battery cell assembly can include multiple battery cells, which are the smallest units where electrochemical reactions occur. The housing houses the battery cell assembly. In related technologies, the housing typically includes a frame and a heat exchanger. The frame defines a space for housing the battery cell assembly; that is, the battery cell assembly is disposed within the space of the frame to protect it. The heat exchanger is connected to the bottom of the frame and serves not only for heat exchange with the battery cell assembly but also for supporting the battery cell assembly.

[0091] The inventors of this application discovered that, because the heat exchanger is connected to the bottom of the frame and needs to bear the gravitational load of the battery cells, the connection structure between the heat exchanger and the frame needs to withstand a large load. This makes stress concentration prone to occur at the connection point, leading to breakage of the connection structure and ultimately connection failure. Therefore, in related technologies, the connection strength between the heat exchanger and the frame is low, resulting in reduced structural strength of the battery pack and hindering the improvement of the battery pack's safety performance.

[0092] Based on the above considerations, in order to improve the structural strength of the battery device housing, the heat exchange component in the battery device provided in this application embodiment is used to support the battery cell assembly, and the first support portion is used to support the heat exchange component, so that the gravity load of the heat exchange component can be directly transferred to the frame, and the gravity load of the battery cell assembly can be transferred to the frame through the heat exchange component. That is, the frame can simultaneously bear the gravity load of the heat exchange component and the gravity load of the battery cell assembly, effectively improving the stress concentration at the connection between the heat exchange component and the frame. At the same time, by setting the first connection gap between the heat exchange component and the first support portion, and setting the first connection groove and the second connection groove on opposite sides of the first connection gap along the second direction, after the first connection gap, the first connection groove and the second connection groove are fully filled with the connecting medium, the connection area of ​​the connecting medium between the heat exchange component and the first side beam is effectively increased. Meanwhile, the connecting medium located in the first connection groove and the second connection groove can effectively resist the shear stress along the second direction, thereby effectively improving the connection strength between the heat exchange component and the first side beam, and effectively limiting the relative position of the heat exchange component and the frame along the first direction and the second direction. In this way, by optimizing the stress structure and connection structure between the heat exchanger and the frame, the connection strength between the heat exchanger and the frame can be effectively improved, thereby effectively improving the structural strength of the housing and effectively enhancing the safety performance of the battery device.

[0093] The battery device disclosed in this application can be used in electrical devices that use batteries as a power source or in various energy storage systems that use batteries as energy storage elements. Electrical devices can be, but are 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.

[0094] For ease of explanation, the following embodiments use a vehicle as an example of the electrical equipment provided in this application.

[0095] Please refer to Figure 3 , Figure 3 This is a schematic diagram of the structure of a vehicle 1000 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., and can be trucks, excavators, cranes, passenger cars, commercial vehicles, etc. The vehicle 1000 is equipped with a battery device 100, which 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.

[0096] 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.

[0097] The battery device 100 mentioned in the embodiments of this application may include one or more battery cell assemblies 10 for providing voltage and capacity. The battery cell assembly 10 may include a plurality of battery cells 11, which are connected in series, parallel, or mixed connection via a busbar.

[0098] In some embodiments, the battery cell assembly 10 is typically formed by arranging a plurality of battery cells 11.

[0099] As an example, the battery cell assembly 10 can be a battery module, which is formed by arranging and fixing multiple battery cells 11 into an independent module. As an example, the battery module can be formed by binding multiple battery cells 11 together with a restraint member.

[0100] In some embodiments, the battery device 100 may be a battery pack, which includes a housing 20 and one or more battery cell assemblies 10, the battery cell assemblies 10 being housed in the housing 20.

[0101] As an example, the battery cell assembly 10 can be a battery module, and the battery cell assembly 10 can be housed in the housing 20 by fixing the battery module in the housing 20.

[0102] As an example, the battery cell assembly 10 can also be housed in the housing 20 by directly fixing multiple battery cells 11 to the housing 20.

[0103] In some embodiments, the housing 20 may be part of the chassis structure of the vehicle 1000. For example, a portion of the housing 20 may be at least a portion of the floor of the vehicle 1000, or a portion of the housing 20 may be at least a portion of the crossbeams and longitudinal beams of the vehicle 1000.

[0104] This application provides an energy storage device 1, including one or more battery clusters to increase the voltage and capacity of the energy storage device 1. The battery clusters may include multiple battery devices 100, which are connected in series via a busbar to increase the voltage of the energy storage device 1. When the energy storage device 1 includes multiple battery clusters, the multiple battery clusters are connected in parallel to increase the capacity of the energy storage device 1.

[0105] The energy storage device 1 can be used in energy storage power stations, wind power generation systems, solar power generation systems, mobile power systems, or temporary power supply systems, etc. The energy storage device 1 can store electrical energy as needed and output it when appropriate. For example, the energy storage device 1 can store electrical energy during off-peak hours and provide power to relevant users or electrical equipment during peak hours. The energy storage system provided in this application embodiment can be any power system that requires the use of the energy storage device 1.

[0106] In some embodiments, the energy storage device 1 is an energy storage container or an energy storage cabinet.

[0107] In some embodiments, the energy storage device 1 may include a cabinet and one or more battery clusters, with the battery clusters housed in the cabinet.

[0108] In some embodiments, the energy storage device 1 may include modules such as a thermal management module, a main control module, a central control module, a power distribution module, and a fire protection module.

[0109] As an example, the thermal management module may include a liquid cooling unit that supplies coolant to each battery device 100 via pipelines for regulating the temperature of the individual battery cells 11.

[0110] As an example, the main control module can serve as the battery management unit for the battery cluster, used to monitor and manage the battery cluster. The main control module can monitor information such as the current, voltage, power, or temperature of the battery cluster. For instance, it can control the charging and discharging current and voltage of the battery cluster. The main control module includes modules such as an auxiliary battery management unit and a fusion switch.

[0111] As an example, the central control module can serve as the battery management unit of energy storage device 1, used to monitor and manage energy storage device 1. The central control module can monitor information such as current, voltage, power, state of charge, or temperature of energy storage device 1. For example, it can control the charging and discharging current and voltage of energy storage device 1. As an example, the central control module includes modules such as an insulation monitoring module, a main battery management unit, and an Ethernet and fiber optic conversion module.

[0112] As an example, a fire protection system includes control panels, detectors, alarm devices, etc., used to detect, alarm, or extinguish fires in energy storage systems.

[0113] As an example, the power distribution device can be used to distribute power to the power consumption modules of the energy storage device 1.

[0114] In some embodiments, please refer to Figure 1 The energy storage system may include one or more energy storage devices 1 and an energy conversion system 2. The energy conversion system 2 is used to connect the power generation equipment 3, the power grid, or the load to the energy storage device 1. The power generation equipment 3 is used to generate electrical energy, the energy storage device 1 is used to store electrical energy, and the energy conversion system 2 is used to convert the current input to the energy storage device 1 or the current output from the energy storage device 1 into energy. The electrical energy generated by the power generation equipment 3 can be stored in the energy storage device 1 through the energy conversion system 2, and the electrical energy stored in the energy storage device 1 can also be output to the load or the power grid through the energy conversion system 2. As an example, the power generation equipment 3 may specifically be a solar panel, a hydroelectric power generation device, a thermal power generation device, a wind power generation device, etc. The specific type of the power generation equipment 3 is not limited in this application.

[0115] Please see Figure 2 This application provides a charging network including a charging pile 4 and an energy storage device 1. The charging pile 4 is electrically connected to the energy storage device 1, which provides power to the charging pile 4. The charging pile 4 is electrically connected to a battery device 100 in the energy storage device 1 via a cable, and the battery device 100 can provide its stored energy to the charging pile 4. The charging pile 4 has one or more connectors 5 for connecting to electrical equipment (such as a vehicle 1000, an aircraft, etc.) to replenish power to the electrical equipment.

[0116] The energy storage device 1 can be located inside the charging pile 4 (e.g., an integrated energy storage and charging unit) or outside the charging pile 4.

[0117] The technical solutions provided in the embodiments of this application will be described below with reference to the accompanying drawings.

[0118] Firstly, please refer to the following: Figures 4 to 8 This application provides a battery device 100, including a battery cell assembly 10 and a housing 20. The housing 20 has a receiving space 21 for accommodating the battery cell assembly 10. The housing 20 includes a heat exchanger 22 for heat exchange with the battery cell assembly 10 and a frame 23 for defining the receiving space 21. The heat exchanger 22 is disposed on one side of the battery cell assembly 10 along a first direction to support the battery cell assembly 10. The frame 23 includes a first side beam 231 disposed on one side of the battery cell assembly 10 along a second direction, the second direction being perpendicular to the first direction. The first side beam 231 includes a first beam body 2311 and a first support portion 23. 12. The first support portion 2312 protrudes from the side of the first beam 2311 facing the battery cell assembly 10 and is used to support the heat exchange component 22; wherein, a first connection space 24 for filling the connection medium 28 is provided between the heat exchange component 22 and the first side beam 231. The first connection space 24 includes a first connection gap 241, a first connection groove 242 and a second connection groove 243. Along the first direction, the first connection gap 241 is disposed between the heat exchange component 22 and the first support portion 2312. The first connection groove 242 and the second connection groove 243 are respectively disposed on opposite sides of the first connection gap 241 along the second direction and are connected to the first connection gap 241.

[0119] First, it should be noted that the battery device 100 has a first direction, a second direction, and a third direction. For example... Figure 4 and Figure 5 As shown, the first direction can be Figure 4 and Figure 5 The Z direction shown is the height direction of the battery device 100. Both the second and third directions are perpendicular to the first direction, and the second direction is perpendicular to the third direction. The second direction can be... Figure 4 and Figure 5 The X direction shown is the length direction of the battery device 100. The third direction can be... Figure 4 and Figure 5 The Y direction shown is the width direction of the battery device 100.

[0120] The battery device 100 mentioned in the embodiments of this application may include one or more battery cell assemblies 10 for providing voltage and capacity. The battery cell assembly 10 may include a plurality of battery cells 11, which are connected in series, parallel, or mixed connection via a busbar.

[0121] In some embodiments, the battery cell assembly 10 is typically formed by arranging a plurality of battery cells 11.

[0122] As an example, the battery cell assembly 10 can be a battery module, which is formed by arranging and fixing multiple battery cells 11 into an independent module. As an example, the battery module can be formed by bundling multiple battery cells 11 together with cable ties.

[0123] In some embodiments, the battery device 100 may be a battery pack, which includes a housing 20 and one or more battery cell assemblies 10, the battery cell assemblies 10 being housed in the housing 20.

[0124] As an example, the battery cell assembly 10 can be a battery module, and the battery cell assembly 10 can be housed in the housing 20 by fixing the battery module in the housing 20.

[0125] As an example, the battery cell assembly 10 can also be housed in the housing 20 by directly fixing multiple battery cells 11 to the housing 20.

[0126] In this embodiment of the application, the battery cell 11 can be a secondary battery, which refers to the battery cell 11 that can be used again after being discharged by recharging to activate the active material.

[0127] The battery cell 11 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.

[0128] The housing 20 is used to provide a housing space 21 for the battery cell assembly 10 to protect the battery cell assembly 10.

[0129] In some embodiments, the battery device 100 further includes a cover 30, which covers the opening of the housing 20 to close the aforementioned receiving space 21.

[0130] In some embodiments, the housing 20 further includes at least two structural beams 27, which are disposed within the accommodating space 21 and cooperate with each other to clamp the battery cell assembly 10, thereby limiting the expansion of the battery cell 11.

[0131] In some embodiments, the housing 20 may be part of the chassis structure of the vehicle 1000. For example, a portion of the housing 20 may be at least a portion of the floor of the vehicle 1000, or a portion of the housing 20 may be at least a portion of the crossbeams and longitudinal beams of the vehicle 1000.

[0132] The heat exchanger 22 is a component used to regulate the temperature of the battery cell assembly 10. The heat exchanger 22 may have a plate-like structure, be perpendicular to the first direction, and be disposed on one side of the battery cell assembly 10 along the first direction to support the battery cell assembly 10. In this embodiment, the heat exchanger 22 is disposed on the bottom side of the battery cell assembly 10 along the first direction to support the battery cell 11. The heat exchanger 22 may be in direct contact with the battery cell assembly 10, meaning that direct heat exchange is possible between the heat exchanger 22 and the battery cell assembly 10; alternatively, the heat exchanger 22 may be in indirect contact with the battery cell assembly 10, meaning that heat exchange is possible between the heat exchanger 22 and the battery cell assembly 10 through a thermally conductive material located between them.

[0133] In some embodiments, the heat exchanger 22 has a plurality of heat exchange channels 22211 for circulating heat exchange medium. During the flow of the heat exchange medium in the heat exchange channels 22211, it can absorb heat from the battery cell assembly 10 or transfer heat to the battery cell assembly 10 to regulate the temperature of the battery cell assembly 10.

[0134] As an example, the heat exchanger 22 is made of a metal material, which can be, but is not limited to, copper, aluminum, aluminum alloy, stainless steel, etc.

[0135] The frame 23 is a component used to define the aforementioned receiving space 21. Understandably, the frame 23 surrounds the battery cell assembly 10 to define the receiving space 21, meaning the battery cell assembly 10 is located within the frame space of the frame 23, thus protecting the battery cell assembly 10. The frame 23 is made of a rigid material and can withstand external impact forces acting on the outer periphery of the battery device 100, reducing or eliminating the external impact forces on the battery cell assembly 10, thereby protecting the battery cell assembly 10. The frame 23 can be a metal frame 23, a non-metal frame 23, or a composite frame of metal and non-metal. The frame 23 can also be a square frame 23, a circular frame 23, an elliptical frame 23, or other irregularly shaped frame 23.

[0136] In some embodiments, the battery device 100 may further include a control module, which is housed within the housing space 21 and electrically connected to the battery cell assembly 10 to control the operating state of the battery cell assembly 10.

[0137] The first side beam 231 serves as the boundary component of the frame 23 along the second direction. The first beam body 2311 is the main body of the first side beam 231, and the first support portion 2312 is a portion protruding from the first beam body 2311 on the side facing the battery cell assembly 10. The first side beam 231 can be an integrally formed component, meaning the first beam body 2311 and the first support portion 2312 can be formed as a single unit using an integral molding process, for example, the first beam body 2311 and the first support portion 2312 can be formed as a single unit using a die-casting process; the first side beam 231 can also be a separate component, meaning the first beam body 2311 and the first support portion 2312 can be formed separately and then connected to form a single unit, for example, the first beam body 2311 and the first support portion 2312 can be formed separately and then welded together to form a single unit.

[0138] In this embodiment of the application, the heat exchanger 22 is mounted on the first support portion 2312 along the side of the second direction, so that part of the gravity load of the heat exchanger 22 itself and part of the gravity load applied to the heat exchanger 22 by the battery cell assembly 10 can be transferred to the first support portion 2312.

[0139] In some embodiments, the frame 23 includes two first side beams 231, which are respectively disposed on opposite sides of the battery cell assembly 10 along the second direction. A first support portion 2312 of one first side beam 231 is used to support one side of the heat exchanger 22 along the second direction, and a first support portion 2312 of the other first side beam 231 is used to support the other side of the heat exchanger 22 along the second direction. This makes the force on the opposite sides of the heat exchanger 22 more balanced along the second direction, further improving the stress concentration of the heat exchanger 22, thereby effectively reducing the risk of torsional deformation of the heat exchanger 22 and further improving the structural strength of the housing 20.

[0140] A first connecting space 24 is provided between the side of the heat exchanger 22 along the second direction and the first side beam 231. The first connecting space 24 can be filled with a connecting medium 28 to connect the heat exchanger 22 and the first side beam 231.

[0141] As an example, the connecting medium 28 can be an adhesive medium, such as structural adhesive. In other words, the heat exchanger 22 is bonded to the first side beam 231. This not only simplifies the connection process between the heat exchanger 22 and the first side beam 231, but also makes the stress on the connection between the heat exchanger 22 and the first side beam 231 more uniform, further improving the connection strength between the heat exchanger 22 and the first side beam 231. It can also effectively seal the gap between the heat exchanger 22 and the first side beam 231, effectively improving the sealing performance of the housing 20.

[0142] The connecting medium 28 can also be other media with a certain degree of fluidity that can connect two components, and no specific limitation is made here.

[0143] The first connecting groove 242 can be formed on the first support portion 2312, or on the first beam 2311, or it can be formed by the heat exchanger 22 and the first side beam 231 enclosing each other.

[0144] As an example, the heat exchanger 22 faces the side of the first beam 2311 along the second direction, and the first beam 2311 and the first support portion 2312 enclose each other to form a first connecting groove 242.

[0145] The second connecting groove 243 can be formed on the first support portion 2312, or it can be formed by the heat exchanger 22 and the first support portion 2312 enclosing each other.

[0146] As an example, the second connecting groove 243 is recessed on the side of the first support portion 2312 away from the first beam 2311 along the second direction.

[0147] Understandably, since the first connecting groove 242 and the second connecting groove 243 are respectively located on opposite sides of the first connecting gap 241 along the second direction and are connected to the first connecting gap 241, after the connecting medium 28 is filled into the first connecting space 24, the connecting medium 28 in the first connecting gap 241, the connecting medium 28 in the first connecting groove 242 and the connecting medium 28 in the second connecting groove 243 can form a whole after curing.

[0148] In this embodiment, the connecting medium 28 located in the first connecting gap 241 constitutes the main connection interface between the heat exchanger 22 and the first support portion 2312, effectively limiting the displacement of the heat exchanger 22 relative to the first support portion 2312 along the first direction. The connecting medium 28 located in the first connecting groove 242 and the connecting medium 28 located in the second connecting groove 243 primarily resist shear stress along the second direction, effectively limiting the displacement of the heat exchanger 22 relative to the first beam 2311 along the second direction. For example, as... Figure 8 As shown, when the heat exchanger 22 tends to displace upward relative to the first beam 2311 in the second direction, the connecting medium 28 in the first connecting groove 242 can pull the heat exchanger 22 downward in the second direction to limit the upward displacement of the heat exchanger 22 relative to the first beam 2311 in the second direction; when the heat exchanger 22 tends to displace downward relative to the first beam 2311 in the second direction, the connecting medium 28 in the second connecting groove 243 can pull the heat exchanger 22 upward in the second direction to limit the downward displacement of the heat exchanger 22 relative to the first beam 2311 in the second direction.

[0149] The heat exchanger 22 in the battery device 100 provided in this application embodiment is used to support the battery cell assembly 10, and the first support portion 2312 is used to support the heat exchanger 22, so that the gravity load of the heat exchanger 22 can be directly transferred to the frame 23, and the gravity load of the battery cell assembly 10 can be transferred to the frame 23 through the heat exchanger 22. That is, the frame 23 can simultaneously bear the gravity load of the heat exchanger 22 and the gravity load of the battery cell assembly 10, effectively improving the stress concentration at the connection between the heat exchanger 22 and the frame 23; at the same time, by setting the first connection gap 241 between the heat exchanger 22 and the first support portion 2312, and the first The connecting groove 242 and the second connecting groove 243 are respectively located on opposite sides of the first connecting gap 241 along the second direction. After the connecting medium 28 is fully filled into the first connecting gap 241, the first connecting groove 242, and the second connecting groove 243, the connection area of ​​the connecting medium 28 between the heat exchanger 22 and the first side beam 231 is effectively increased. At the same time, the connecting medium 28 located in the first connecting groove 242 and the second connecting groove 243 can effectively resist the shear stress along the second direction, thereby effectively improving the connection strength between the heat exchanger 22 and the first side beam 231 and effectively limiting the relative position of the heat exchanger 22 and the frame 23 along the first and second directions. In this way, by optimizing the stress structure and connection structure between the heat exchanger 22 and the frame 23, the connection strength between the heat exchanger 22 and the frame 23 can be effectively improved, thereby effectively improving the structural strength of the housing 20 and effectively enhancing the safety performance of the battery device 100.

[0150] In addition, the connecting medium 28 in the first connecting groove 242 and the connecting medium 28 in the second connecting groove 243 can effectively seal the gap between the heat exchanger 22 and the first side beam 231, thereby effectively improving the sealing performance of the housing 20.

[0151] In some embodiments of this application, please refer to Figure 8 The dimension H1 of the first connection gap 241 along the first direction is 0.1mm-0.5mm.

[0152] The dimension H1 of the first connection gap 241 along the first direction can be determined according to the actual application requirements, and can be 0.1mm, 0.2mm, 0.3mm, 0.4mm, 0.5mm, etc.

[0153] In other embodiments of this application, please refer to Figure 8 The dimension H2 of the first connecting groove 242 along the first direction is 1mm-5mm.

[0154] The dimension H2 of the first connecting groove 242 along the first direction can be determined according to the actual application requirements, specifically 1mm, 2mm, 3mm, 4mm, 5mm, etc.

[0155] In some other embodiments of this application, please refer to Figure 8 The dimension H3 of the second connecting groove 243 along the first direction is 1mm-5mm.

[0156] The dimension H3 of the second connecting groove 243 along the first direction can be determined according to the actual application requirements, specifically 1mm, 2mm, 3mm, 4mm, 5mm, etc.

[0157] In some other embodiments of this application, please refer to Figure 8 The dimension H1 of the first connecting gap 241 along the first direction is 0.1mm-0.5mm, the dimension H2 of the first connecting groove 242 along the first direction is 1mm-5mm, and the dimension H3 of the second connecting groove 243 along the first direction is 1mm-5mm.

[0158] In this embodiment, the dimensions H2 of the first connecting groove 242 along the first direction and the dimensions H3 of the second connecting groove 243 along the first direction are both greater than the dimensions H1 of the first connecting gap 241 along the first direction. After the connecting medium 28 is fully filled in the first connecting gap 241, the first connecting groove 242 and the second connecting groove 243, the connecting medium 28 located in the first connecting groove 242 and the connecting medium 28 located in the second connecting groove 243 protrude along the first direction relative to the connecting medium 28 located in the first connecting gap 241.

[0159] By adopting the above technical solution, on the one hand, under the premise that the connecting medium 28 can effectively connect the heat exchanger 22 and the first support part 2312, the amount of material used in the connecting medium 28 can be reduced, and the material cost of the connecting medium 28 can be reduced; on the other hand, the connection area of ​​the connecting medium 28 between the heat exchanger 22 and the first side beam 231 is effectively increased, and the shear resistance and peel resistance of the connecting medium 28 are enhanced, thereby further improving the connection strength between the heat exchanger 22 and the frame 23.

[0160] In some embodiments of this application, please refer to Figure 8 The dimension W1 of the first connecting gap 241 along the second direction is 12mm-25mm.

[0161] The dimension W1 of the first connection gap 241 along the second direction can be determined according to the actual application requirements, and can be 12mm, 13mm, 14mm, 15mm, 16mm, 17mm, 18mm, 19mm, 20mm, 21mm, 22mm, 23mm, 24mm, 25mm, etc.

[0162] In other embodiments of this application, please refer to Figure 8 The dimension W2 of the first connecting groove 242 along the second direction is 5mm-10mm.

[0163] The dimension W2 of the first connecting groove 242 along the second direction can be determined according to the actual application requirements, specifically 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, etc.

[0164] In some other embodiments of this application, please refer to Figure 8 The dimension W3 of the second connecting groove 243 along the second direction is 5mm-10mm.

[0165] The dimension W3 of the second connecting groove 243 along the second direction can be determined according to the actual application requirements, specifically 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, etc.

[0166] In some other embodiments of this application, please refer to Figure 8 The dimension W1 of the first connecting gap 241 along the second direction is 12mm-25mm, the dimension W2 of the first connecting groove 242 along the second direction is 5mm-10mm, and the dimension W3 of the second connecting groove 243 along the second direction is 5mm-10mm.

[0167] In this embodiment, the dimension W1 of the first connecting gap 241 along the second direction is greater than the dimension W2 of the first connecting groove 242 along the second direction and the dimension W3 of the second connecting groove 243 along the second direction.

[0168] By adopting the above technical solution, the middle part of the connecting medium 28 extends along the second direction, which effectively increases the connection area of ​​the connecting medium 28 between the heat exchanger 22 and the first side beam 231, effectively restricts the relative position of the heat exchanger 22 and the frame 23 along the first and second directions, thereby further improving the connection strength between the heat exchanger 22 and the frame 23.

[0169] Please refer to some embodiments of this application as well. Figure 9 and Figure 10 The first connection gap 241 includes two first regions 2411 and a second region 2412 disposed between the two first regions 2411 along the second direction. The first region 2411 is used to fill the connection medium 28. The first connection groove 242 is connected to one of the first regions 2411, and the second connection groove 243 is connected to the other first region 2411. The heat exchanger 22 and the first support portion 2312 are welded to each other in the second region 2412.

[0170] In this embodiment, the first connecting groove 242 is connected to a first region 2411 so that the connecting medium 28 in the first connecting groove 242 and the connecting medium 28 in the first region 2411 are connected to form a whole. The second connecting groove 243 is connected to another first region 2411 so that the connecting medium 28 in the second connecting groove 243 and the connecting medium 28 in the other first region 2411 are connected to form a whole.

[0171] The connecting medium 28 can be filled into the first connecting space 24 firstly. Then, a welding device can be used to press the heat exchanger 22 against it and weld the heat exchanger 22 and the first support 2312 in the second region 2412. When the welding device presses against the heat exchanger 22, at least a portion of the connecting medium 28 located in the second region 2412 will be squeezed into a first region 2411 and a first connecting groove 242. At least another portion of the connecting medium 28 located in the second region 2412 will be squeezed into another first region 2411 and a second connecting groove 243, so that the connecting medium 28 can be evenly distributed between the heat exchanger 22 and the first support 2312, thereby enabling the heat exchanger 22 and the first support 2312 to be more tightly connected.

[0172] In some embodiments, please refer to the following: Figures 7 to 10 Welding equipment can be used to spot weld the heat exchanger 22 to the first support 2312 in the second region 2412, thereby reducing the production cost of the housing 20.

[0173] As an example, after filling the first connection space 24 with the connecting medium 28 and spot welding the heat exchanger 22 and the first support 2312 in the second region 2412 using a welding device, the connecting medium 28 is provided between two adjacent welded joints of the heat exchanger 22 and the first support 2312 along the third direction. In other words, the heat exchanger 22 and the first support 2312 are both welded and connected by the connecting medium 28 in the second region 2412.

[0174] By adopting the above technical solution, on the one hand, the connecting medium 28 can effectively seal the gap between the heat exchange component 22 and the first side beam 231, effectively improving the sealing performance of the housing 20. On the other hand, the heat exchange component 22 and the first support part 2312 are not only connected by the connecting medium 28, but also welded to each other, which further improves the connection strength between the heat exchange component 22 and the first side beam 231, thereby further improving the structural strength of the housing 20 and further enhancing the safety performance of the battery device 100.

[0175] Please refer to some embodiments of this application as well. Figure 6 , Figure 11 and Figure 12The frame 23 also includes a second side beam 232 disposed on one side of the battery cell assembly 10 along a third direction. The third direction is perpendicular to the first and second directions. The second side beam 232 includes a second beam body 2321 and a second support portion 2322. The second support portion 2322 protrudes from the side of the second beam body 2321 facing the battery cell assembly 10 and is used to support the heat exchanger 22. A second connection space 25 for filling the connection medium 28 is disposed between the heat exchanger 22 and the second side beam 232. The second connection space 25 includes a second connection gap 251, a third connection groove 252 and a fourth connection groove 253. Along the first direction, the second connection gap 251 is disposed between the heat exchanger 22 and the second support portion 2322. The third connection groove 252 and the fourth connection groove 253 are disposed on opposite sides of the second connection gap 251 along the third direction and are connected to the second connection gap 251.

[0176] The second side beam 232 serves as the boundary component of the frame 23 along a third direction. The second beam body 2321 is the main body of the second side beam 232, and the second support portion 2322 is a portion protruding from the second beam body 2321 on the side facing the battery cell assembly 10. The second side beam 232 can be an integrally formed component, meaning the second beam body 2321 and the second support portion 2322 can be formed as a single unit using an integral molding process, for example, by die casting. Alternatively, the second side beam 2322 can be a separate component, meaning the second beam body 2321 and the second support portion 2322 can be individually formed and then connected to form a single unit, for example, the second beam body 2321 and the second support portion 2322 can be individually formed and then welded together to form a single unit.

[0177] In this embodiment, the heat exchanger 22 is mounted on the second support 2322 along the third direction side, so that part of the gravity load of the heat exchanger 22 itself and part of the gravity load applied to the heat exchanger 22 by the battery cell assembly 10 can be transferred to the second support 2322.

[0178] In some embodiments, the frame 23 includes two second side beams 232, which are respectively disposed on opposite sides of the battery cell assembly 10 along a third direction. The second support portion 2322 of one second side beam 232 is used to support one side of the heat exchanger 22 along the third direction, and the second support portion 2322 of the other second side beam 232 is used to support the other side of the heat exchanger 22 along the third direction. This makes the force on the opposite sides of the heat exchanger 22 more balanced along the third direction, further improving the stress concentration of the heat exchanger 22, thereby effectively reducing the risk of torsional deformation of the heat exchanger 22 and further improving the structural strength of the housing 20.

[0179] In some embodiments, the frame 23 includes two first side beams 231 and two second side beams 232. The two first side beams 231 are disposed on opposite sides of the battery cell assembly 10 along a second direction. A first support portion 2312 of one first side beam 231 supports one side of the heat exchanger 22 along the second direction, and a first support portion 2312 of the other first side beam 231 supports the other side of the heat exchanger 22 along the second direction. The two second side beams 232 are disposed on opposite sides of the battery cell assembly 10 along a third direction. A second support portion 2322 of one second side beam 232 supports one side of the heat exchanger 22 along the third direction, and a second support portion 2322 of the other second side beam 232 supports the other side of the heat exchanger 22 along the third direction. Both second side beams 232 are connected between the two first side beams 231. After the connecting medium 28 is filled into the first connecting space 24 and the second connecting space 25, the connecting medium 28 located in the first connecting space 24 and the connecting medium 28 located in the second connecting space 25 are connected to form an integral part surrounding the battery cell assembly 10, so that the connecting medium 28 forms a ring structure and constitutes a sealing interface surrounding the battery cell assembly 10, which effectively improves the sealing performance of the battery device 100.

[0180] A second connection space 25 is provided between the heat exchanger 22 and the second side beam 232 along the third direction. The connection medium 28 can be filled in the second connection space 25 to connect the heat exchanger 22 and the second side beam 232.

[0181] As an example, the connecting medium 28 can be an adhesive medium, such as structural adhesive. In other words, the heat exchanger 22 is bonded to the second side beam 232. This not only simplifies the connection process between the heat exchanger 22 and the second side beam 232, but also makes the stress on the connection between the heat exchanger 22 and the second side beam 232 more uniform, further improving the connection strength between the heat exchanger 22 and the second side beam 232. It can also effectively seal the gap between the heat exchanger 22 and the second side beam 232, effectively improving the sealing performance of the housing 20.

[0182] The connecting medium 28 can also be other media with a certain degree of fluidity that can connect two components, and no specific limitation is made here.

[0183] The third connecting groove 252 can be formed on the second support portion 2322, or on the second beam 2321, or it can be formed by the heat exchanger 22 and the second side beam 232 enclosing each other.

[0184] As an example, the heat exchanger 22 faces the side of the second beam 2321 along a third direction, and the second beam 2321 and the second support 2322 enclose each other to form a third connecting groove 252.

[0185] The fourth connecting groove 253 can be formed on the second support portion 2322, or it can be formed by the heat exchanger 22 and the second support portion 2322 enclosing each other.

[0186] As an example, the fourth connecting groove 253 is recessed in the second support portion 2322 along the third direction away from the second beam 2321.

[0187] Understandably, since the third connecting groove 252 and the fourth connecting groove 253 are respectively located on opposite sides of the second connecting gap 251 along the third direction and are connected to the second connecting gap 251, after the connecting medium 28 is filled into the second connecting space 25, the connecting medium 28 in the second connecting gap 251, the connecting medium 28 in the third connecting groove 252 and the connecting medium 28 in the fourth connecting groove 253 can form a whole after curing.

[0188] In this embodiment, the connecting medium 28 located in the second connecting gap 251 constitutes the main connection interface between the heat exchanger 22 and the second support 2322, effectively limiting the displacement of the heat exchanger 22 relative to the second support 2322 along the first direction. The connecting medium 28 located in the third connecting groove 252 and the fourth connecting groove 253 primarily resist shear stress along the third direction, effectively limiting the displacement of the heat exchanger 22 relative to the second beam 2321 along the third direction. For example, as... Figure 12 As shown, when the heat exchanger 22 tends to shift to the left relative to the second beam 2321 in a third direction, the connecting medium 28 in the third connecting groove 252 can pull the heat exchanger 22 to the right in a third direction to limit the displacement of the heat exchanger 22 relative to the second beam 2321 in a third direction to the left; when the heat exchanger 22 tends to shift to the right relative to the second beam 2321 in a third direction, the connecting medium 28 in the fourth connecting groove 253 can pull the heat exchanger 22 to the left in a third direction to limit the displacement of the heat exchanger 22 relative to the second beam 2321 in a third direction to the right.

[0189] By adopting the above technical solution, the frame 23 can simultaneously support the heat exchanger 22 on both the side along the second direction and the side along the third direction, further optimizing the stress structure and connection structure between the heat exchanger 22 and the frame 23, further improving the connection strength between the heat exchanger 22 and the frame 23, thereby further improving the structural strength of the housing 20 and further enhancing the safety performance of the battery device 100.

[0190] In addition, the connecting medium 28 in the third connecting groove 252 and the connecting medium 28 in the fourth connecting groove 253 can effectively seal the gap between the heat exchanger 22 and the second side beam 232, thereby effectively improving the sealing performance of the housing 20.

[0191] In some embodiments of this application, please refer to Figure 12 The dimension H4 of the second connection gap 251 along the first direction is 0.1mm-0.5mm.

[0192] The dimension H4 of the second connection gap 251 along the first direction can be determined according to the actual application requirements, specifically 0.1mm, 0.2mm, 0.3mm, 0.4mm, 0.5mm, etc.

[0193] In other embodiments of this application, please refer to Figure 12 The dimension H5 of the third connecting groove 252 along the first direction is 1mm-5mm.

[0194] The dimension H5 of the third connecting groove 252 along the first direction can be determined according to the actual application requirements, specifically 1mm, 2mm, 3mm, 4mm, 5mm, etc.

[0195] In some other embodiments of this application, please refer to Figure 12 The dimension H6 of the fourth connecting groove 253 along the first direction is 1mm-5mm.

[0196] The dimension H6 of the fourth connecting groove 253 along the first direction can be determined according to the actual application requirements, specifically 1mm, 2mm, 3mm, 4mm, 5mm, etc.

[0197] In some other embodiments of this application, please refer to Figure 12 The second connecting gap 251 has a dimension H4 of 0.1mm-0.5mm along the first direction, the third connecting groove 252 has a dimension H5 of 1mm-5mm along the first direction, and the fourth connecting groove 253 has a dimension H6 of 1mm-5mm along the first direction.

[0198] In this embodiment, the dimensions H5 of the third connecting groove 252 along the first direction and the dimension H6 of the fourth connecting groove 253 along the first direction are both greater than the dimension H4 of the second connecting gap 251 along the first direction. After the connecting medium 28 is fully filled in the second connecting gap 251, the third connecting groove 252 and the fourth connecting groove 253, the connecting medium 28 located in the third connecting groove 252 and the connecting medium 28 located in the fourth connecting groove 253 protrude along the first direction relative to the connecting medium 28 located in the second connecting gap 251.

[0199] By adopting the above technical solution, on the one hand, under the premise that the connecting medium 28 can effectively connect the heat exchanger 22 and the second support 2322, the amount of material used in the connecting medium 28 can be reduced, and the material cost of the connecting medium 28 can be reduced; on the other hand, the connection area of ​​the connecting medium 28 between the heat exchanger 22 and the second side beam 232 is effectively increased, and the shear resistance and peel resistance of the connecting medium 28 are enhanced, thereby further improving the connection strength between the heat exchanger 22 and the frame 23.

[0200] In some embodiments of this application, please refer to Figure 12 The second connection gap 251 has a dimension W4 of 12mm-25mm along the third direction.

[0201] The dimension W4 of the second connection gap 251 along the third direction can be determined according to the actual application requirements, and can be 12mm, 13mm, 14mm, 15mm, 16mm, 17mm, 18mm, 19mm, 20mm, 21mm, 22mm, 23mm, 24mm, 25mm, etc.

[0202] In other embodiments of this application, please refer to Figure 12 The dimension W5 of the third connecting groove 252 along the third direction is 5mm-10mm.

[0203] The dimension W5 of the third connecting groove 252 along the third direction can be determined according to the actual application requirements, specifically 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, etc.

[0204] In some other embodiments of this application, please refer to Figure 12 The dimension W6 of the fourth connecting groove 253 along the third direction is 5mm-10mm.

[0205] The dimension W6 of the fourth connecting groove 253 along the third direction can be determined according to the actual application requirements, specifically 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, etc.

[0206] In some other embodiments of this application, please refer to Figure 12 The second connecting gap 251 has a dimension W4 of 12mm-25mm along the third direction, the third connecting groove 252 has a dimension W5 of 5mm-10mm along the third direction, and the fourth connecting groove 253 has a dimension W6 of 5mm-10mm along the third direction.

[0207] In this embodiment, the dimension W4 of the second connecting gap 251 along the third direction is greater than the dimension W5 of the third connecting groove 252 along the third direction and the dimension W6 of the fourth connecting groove 253 along the third direction.

[0208] By adopting the above technical solution, the middle part of the connecting medium 28 extends along the third direction, which effectively increases the connection area of ​​the connecting medium 28 between the heat exchanger 22 and the second side beam 232, effectively restricts the relative position of the heat exchanger 22 and the frame 23 along the first direction and the third direction, thereby further improving the connection strength between the heat exchanger 22 and the frame 23.

[0209] Please refer to some embodiments of this application as well. Figure 13 and Figure 14 The second connection gap 251 includes two third regions 2511 and a fourth region 2512 disposed between the two third regions 2511 along a third direction. The third region 2511 is used to fill the connection medium 28. The third connection groove 252 is connected to one of the third regions 2511, and the fourth connection groove 253 is connected to the other third region 2511. The heat exchanger 22 and the second support 2322 are welded to each other in the fourth region 2512.

[0210] In this embodiment, the third connecting groove 252 is connected to a third region 2511 so that the connecting medium 28 in the third connecting groove 252 and the connecting medium 28 in the third region 2511 are connected to form a whole. The fourth connecting groove 253 is connected to another third region 2511 so that the connecting medium 28 in the fourth connecting groove 253 and the connecting medium 28 in the other third region 2511 are connected to form a whole.

[0211] The connecting medium 28 can be filled into the second connecting space 25 first. Then, a welding device can be used to press the heat exchanger 22 against it and weld the heat exchanger 22 and the second support 2322 in the fourth region 2512. When the welding device presses against the heat exchanger 22, at least a portion of the connecting medium 28 located in the fourth region 2512 will be squeezed into a third region 2511 and a third connecting groove 252. At least another portion of the connecting medium 28 located in the fourth region 2512 will be squeezed into another third region 2511 and a fourth connecting groove 253, so that the connecting medium 28 can be evenly distributed between the heat exchanger 22 and the second support 2322, thereby enabling the heat exchanger 22 and the second support 2322 to be more tightly connected.

[0212] In some embodiments, please refer to the following: Figures 11 to 14 Welding equipment can be used to spot weld the heat exchanger 22 and the second support 2322 in the fourth region 2512, thereby reducing the production cost of the housing 20.

[0213] As an example, after filling the second connection space 25 with the connecting medium 28 and spot welding the heat exchanger 22 and the second support 2322 in the fourth region 2512 using a welding device, the connecting medium 28 is provided between two adjacent welded joints of the heat exchanger 22 and the second support 2322 along the second direction. In other words, the heat exchanger 22 and the second support 2322 are both welded and connected by the connecting medium 28 in the fourth region 2512.

[0214] By adopting the above technical solution, on the one hand, the connecting medium 28 can effectively seal the gap between the heat exchange component 22 and the second side beam 232, effectively improving the sealing performance of the housing 20. On the other hand, the heat exchange component 22 and the second support part 2322 are not only connected by the connecting medium 28, but also welded to each other, which further improves the connection strength between the heat exchange component 22 and the second side beam 232, thereby further improving the structural strength of the housing 20 and further enhancing the safety performance of the battery device 100.

[0215] In some embodiments of this application, please refer to Figure 15 The heat exchanger 22 includes a support plate 221 and a flow channel plate 222. The flow channel plate 222 includes a plurality of first plates 2221. Each first plate 2221 has at least one heat exchange flow channel 22211. The plurality of first plates 2221 are stacked on the support plate 221 and are separated along a direction perpendicular to the length direction of the heat exchange flow channel 22211.

[0216] Understandably, in this embodiment, the heat exchanger 22 has a plate-like structure, wherein the support plate 221 is the main support body of the heat exchanger 22, and the flow channel plate 222 is used to provide the flow channel structure of the heat exchanger 22 so that the heat exchange medium can flow within the flow channel structure.

[0217] In this embodiment, the heat exchange channel 22211 is disposed on the first plate 2221, and the heat exchange medium flows in the heat exchange channel 22211 of the first plate 2221 to absorb the heat of the battery cell assembly 10 or transfer the heat to the battery cell assembly 10.

[0218] As an example, the surface of the first plate 2221 facing the support plate 221 is recessed with a heat exchange channel 22211, and the first plate 2221 is stacked on the support plate 221 to close the heat exchange channel 22211.

[0219] Multiple first plates 2221 are stacked on the support plate 221, and the multiple first plates 2221 are separated along a direction perpendicular to the length direction of the heat exchange channel 22211. In other words, in the channel plate 222, each pair of adjacent first plates 2221 forms a hollow structure. In some embodiments, the second direction is parallel to the length direction of the heat exchange channel 22211, that is, the multiple first plates 2221 are separated along the third direction. The frame 23 includes two first side beams 231, which are respectively disposed on opposite sides of the battery cell assembly 10 along the second direction. The first support portion 2312 of one first side beam 231 is used to support one side of the heat exchange component 22 along the second direction, and the first support portion 2312 of the other first side beam 231 is used to support the other side of the heat exchange component 22 along the second direction. Thus, the first support portion 2312 supports the side of the heat exchange component 22 along the second direction, which can play a reinforcing role for the heat exchange component 22, help share the gravity load of the battery cell assembly 10, reduce the risk of deformation of the heat exchange component 22, thereby further improving the structural strength of the housing 20 and further enhancing the safety performance of the battery device 100.

[0220] In some embodiments, the battery cell assembly 10 includes a plurality of battery cell clusters, each battery cell cluster including a plurality of battery cells 11 arranged sequentially along a second direction. The plurality of battery cell clusters are arranged sequentially along a third direction, and each battery cell cluster is correspondingly disposed to at least one first plate 2221, so that each battery cell cluster corresponds to an independent first plate 2221.

[0221] As an example, multiple battery cell clusters are configured in a one-to-one correspondence with multiple first plates 2221.

[0222] By adopting the above technical solution, on the one hand, dividing the flow channel plate 222 into multiple separately arranged first plates 2221 can reduce the amount of material used in the heat exchange component 22, thereby effectively reducing the weight of the heat exchange component 22 and improving the mass energy density of the battery device 100; on the other hand, the heat exchange flow channels 22211 in each first plate 2221 can independently circulate the heat exchange medium, improving the thermal crosstalk between the heat exchange flow channels 22211, thereby effectively improving the temperature consistency of the battery cell assembly 10 and further improving the safety performance of the battery device 100.

[0223] In some embodiments, the support plate 221 may also be configured to include a plurality of third plates, which are spaced apart along a direction perpendicular to the length direction of the heat exchange channel 22211, and are stacked one-to-one with a plurality of first plates 2221 to enclose a space for accommodating the heat exchange medium. In other words, the heat exchanger 22 may have a hollow structure formed along a direction perpendicular to the length direction of the heat exchange channel 22211. This can further improve the mass energy density of the battery device 100 and the temperature uniformity of the battery cell assembly 10.

[0224] In some embodiments of this application, please refer to Figure 15 The flow channel plate 222 also includes a second plate body 2222, and multiple first plates 2221 are connected to the second plate body 2222. The second plate body 2222 has a first confluence flow channel 22221 and a second confluence flow channel 22222. The first plate body 2221 also has an inlet end and an outlet end that are connected to the heat exchange flow channel 22211. The inlet ends of multiple first plates 2221 are connected to the first confluence flow channel 22221, and the outlet ends of multiple first plates 2221 are connected to the second confluence flow channel 22222.

[0225] In this embodiment, the inlet ends of the multiple first plates 2221 are all connected to the first confluence channel 22221, and the outlet ends of the multiple first plates 2221 are all connected to the second confluence channel 22222. That is, the first confluence channel is the liquid inlet channel, and the second confluence channel is the liquid outlet channel. The heat exchange medium can enter the first confluence channel, and then be divided into multiple parts and enter the heat exchange channels 22211 of the corresponding first plates 2221. After flowing through the corresponding heat exchange channels 22211 and exchanging heat with the battery cell 11, the heat exchange medium in the heat exchange channels 22211 of each first plate 2221 flows back to the second confluence channel, and finally flows out to the outside of the heat exchanger 22 through the second confluence channel.

[0226] By adopting the above technical solution, the flow channel structure of the heat exchanger 22 is effectively optimized, and the thermal crosstalk between each heat exchange flow channel 22211 is further improved, thereby further enhancing the temperature consistency of the battery cell assembly 10 and further improving the safety performance of the battery device 100.

[0227] Please refer to some embodiments of this application as well. Figure 4 , Figure 5 and Figure 15 The surface of the support plate 221 facing the battery cell assembly 10 along the first direction is flat, and the flow channel plate 222 is stacked on the surface of the support plate 221 facing away from the battery cell assembly 10 along the first direction.

[0228] Understandably, the support plate 221 is used to support the battery cell assembly 10, wherein the surface of the support plate 221 facing the battery cell assembly 10 along the first direction is a plane, and the flow channel plate 222 is stacked on the surface of the support plate 221 facing away from the battery cell assembly 10 along the first direction, so that the support plate 221 can fit against the bottom surface of the battery cell 11.

[0229] By adopting the above technical solution, the flatness of the surface of the heat exchanger 22 facing the battery cell assembly 10 is improved, which allows the support plate 221 to fit against the bottom surface of the battery cell 11, thereby increasing the contact area between the heat exchanger 22 and the battery cell assembly 10, improving the heat exchange effect between the heat exchanger 22 and the battery cell assembly 10, and further improving the safety performance of the battery device 100.

[0230] Please refer to some embodiments of this application as well. Figure 4 and Figure 5 The housing 20 also includes a protective component 26, which is disposed on the side of the heat exchange component 22 facing away from the battery cell assembly 10 along the first direction, and the protective component 26 is connected to the frame 23.

[0231] Protective component 26 is a component that protects the bottom of housing 20. The material of protective component 26 can be, but is not limited to, aluminum alloy, stainless steel, plastic, etc.

[0232] In some embodiments, the protective member 26 has a plate-like structure, and the protective member 26 covers the bottom opening of the frame 23 and is connected to the frame 23. The connection method between the protective member 26 and the frame 23 can be, but is not limited to, fastening, welding, bonding, etc.

[0233] By adopting the above technical solution, the protective component 26 can protect the heat exchange component 22 and the battery cell assembly 10 from mechanical damage such as impact, scratch, and gravel impact from below the housing 20, thereby improving the rigidity and impact resistance of the housing 20 and further enhancing the safety performance of the battery device 100.

[0234] In some embodiments of this application, please refer to Figure 12 The protective component 26 also includes a protective body 261 and a support body 262. The protective body 261 is disposed on the side of the heat exchange component 22 facing away from the battery cell assembly 10 along the first direction. The protective body 261 is connected to the frame 23, and the support body 262 abuts against the protective body 261 and the heat exchange component 22.

[0235] The protective body 261 is the main part of the protective component 26, and it provides protection for the bottom of the housing 20. The material of the protective body 261 can be, but is not limited to, aluminum alloy, stainless steel, plastic, etc.

[0236] The support 262 is a component used to transfer loads between the heat exchanger 22 and the protective body 261. Understandably, part of the gravity load of the heat exchanger 22 itself and part of the gravity load of the battery cell assembly 10 can be transferred to the protective body 261 through the support 262 to reduce the load borne by the heat exchanger 22.

[0237] In some embodiments, the support 262 may be made of an elastic material, which can transfer loads between the heat exchanger 22 and the protective body 261, and also buffer impact forces from below the housing 20, thereby improving the rigidity and impact resistance of the housing 20 and further enhancing the safety performance of the battery device 100. For example, the support 262 may be foam. Please refer to... Figure 12 The support 262 can be foam that is disposed between the first plate 2221 of the flow channel plate 222 and the protective body 261 along the first direction.

[0238] In some embodiments of this application, a support 262 may be provided between the hollow structure of the flow channel plate 222 and the protective body 261 along the first direction. The support 262 may be a foam material, such as microcellular polypropylene foam (MPP) or rigid polyurethane foam (RPU), which can provide structural stability and ball impact protection, while assisting in thermal management to improve the overall mechanical strength and bottom impact resistance of the battery device 100.

[0239] By adopting the above technical solution, the support body 262 can provide additional support points for the heat exchange component 22, help to share the gravity load of the battery cell assembly 10, reduce the risk of deformation of the heat exchange component 22, thereby further improving the structural strength of the housing 20 and further enhancing the safety performance of the battery device 100.

[0240] Secondly, please refer to Figure 3 This application provides an electrical device including a battery device 100 as described in any of the above embodiments.

[0241] The electrical equipment provided in this application embodiment effectively improves the safety performance of the electrical equipment by using the battery device 100 as described in any of the above embodiments.

[0242] Thirdly, embodiments of this application provide an energy storage device 1, including a battery device 100 as described in any of the above embodiments.

[0243] The energy storage device 1 provided in this application embodiment effectively improves the safety performance of the energy storage device 1 by adopting the battery device 100 as described in any of the above embodiments.

[0244] Fourthly, please refer to Figure 1 This application provides an energy storage system, including an energy storage device 1 as described in any of the above embodiments.

[0245] The energy storage system provided in this application embodiment effectively improves the safety performance of the energy storage system by adopting the energy storage device 1 as described in any of the above embodiments.

[0246] Fifthly, please refer to Figure 2 This application provides a charging network including an energy storage device 1 as described in any of the above embodiments.

[0247] The charging network provided in this application embodiment effectively improves the safety performance of the charging network by employing the energy storage device 1 as described in any of the above embodiments.

[0248] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A battery device, characterized in that, The battery device includes: Battery cell assembly; A housing having a receiving space for accommodating the battery cell assembly, the housing including a heat exchanger for heat exchange with the battery cell assembly and a frame for defining the receiving space, the heat exchanger being disposed on one side of the battery cell assembly along a first direction to support the battery cell assembly, the frame including a first side beam disposed on one side of the battery cell assembly along a second direction perpendicular to the first direction, the first side beam including a first beam body and a first support portion, the first support portion protruding from the side of the first beam body facing the battery cell assembly and used to support the heat exchanger; The heat exchanger and the first side beam are provided with a first connection space for filling the connection medium. The first connection space includes a first connection gap, a first connection groove and a second connection groove. Along the first direction, the first connection gap is provided between the heat exchanger and the first support. The first connection groove and the second connection groove are respectively provided on opposite sides of the first connection gap along the second direction and are connected to the first connection gap.

2. The battery device as claimed in claim 1, characterized in that, The dimension of the first connection gap along the first direction is 0.1mm-0.5mm; and / or, The dimension of the first connecting groove along the first direction is 1mm-5mm; and / or, The second connecting groove has a dimension of 1mm-5mm along the first direction.

3. The battery device as claimed in claim 1, characterized in that, The first connection gap has a dimension of 12mm-25mm along the second direction; and / or, The dimension of the first connecting groove along the second direction is 5mm-10mm; and / or, The second connecting groove has a dimension of 5mm-10mm along the second direction.

4. The battery device as claimed in claim 1, characterized in that, The heat exchanger, along the second direction facing the side of the first beam, and the first beam and the first support portion, enclose the first connecting groove; and / or... The first support portion has a second connecting groove recessed on the side away from the first beam along the second direction.

5. The battery device as claimed in claim 1, characterized in that, The frame includes two first side beams, which are respectively disposed on opposite sides of the battery cell assembly along the second direction.

6. The battery device as claimed in claim 1, characterized in that, The first connection space is used to fill the adhesive medium.

7. The battery device as claimed in claim 1, characterized in that, The first connection gap includes two first regions and a second region disposed between the two first regions along the second direction. The first regions are used to fill the connection medium. The first connection groove is connected to one of the first regions, and the second connection groove is connected to the other first region. The heat exchanger and the first support are welded to each other in the second region.

8. The battery device according to any one of claims 1-7, characterized in that, The frame also includes a second side beam disposed on one side of the battery cell assembly along a third direction, the third direction being perpendicular to the first direction and the second direction. The second side beam includes a second beam body and a second support portion, the second support portion protruding from the side of the second beam body facing the battery cell assembly and used to support the heat exchanger. The heat exchanger and the second side beam are provided with a second connection space for filling the connection medium. The second connection space includes a second connection gap, a third connection groove and a fourth connection groove. Along the first direction, the second connection gap is provided between the heat exchanger and the second support part. The third connection groove and the fourth connection groove are respectively provided on opposite sides of the second connection gap along the third direction and are connected to the second connection gap.

9. The battery device as claimed in claim 8, characterized in that, The second connection gap has a dimension of 0.1mm-0.5mm along the first direction; and / or, The dimension of the third connecting groove along the first direction is 1mm-5mm; and / or, The fourth connecting groove has a dimension of 1mm-5mm along the first direction.

10. The battery device as claimed in claim 8, characterized in that, The second connection gap has a dimension of 12mm-25mm along the third direction; and / or, The third connecting groove has a dimension of 5mm-10mm along the third direction; and / or, The fourth connecting groove has a dimension of 5mm-10mm along the third direction.

11. The battery device as claimed in claim 8, characterized in that, The heat exchanger, along its side facing the second beam in the third direction, and the second beam and the second support portion, enclose the third connecting groove; and / or... The second support portion is recessed along the third direction away from the second beam body, and the fourth connecting groove is provided.

12. The battery device as claimed in claim 8, characterized in that, The frame includes two second side beams, which are respectively disposed on opposite sides of the battery cell assembly along the third direction.

13. The battery device as claimed in claim 8, characterized in that, The second connection space is used to fill the adhesive medium.

14. The battery device as claimed in claim 8, characterized in that, The second connection gap includes two third regions and a fourth region disposed between the two third regions along the third direction. The third regions are used to fill the connection medium. The third connection groove is connected to one of the third regions, and the fourth connection groove is connected to the other third region. The heat exchanger and the second support are welded to each other in the fourth region.

15. The battery device according to any one of claims 1-7, characterized in that, The heat exchanger includes a support plate and a flow channel plate. The flow channel plate includes a plurality of first plates, each first plate having at least one heat exchange flow channel. The plurality of first plates are stacked on the support plate and are separated along a direction perpendicular to the length direction of the heat exchange flow channel.

16. The battery device as claimed in claim 15, characterized in that, The flow channel plate also includes a second plate body, and a plurality of first plates bodies are connected to the second plate body. The second plate body has a first confluence flow channel and a second confluence flow channel. The first plate body also has an inlet end and an outlet end that are connected to the heat exchange flow channel. The inlet ends of the plurality of first plates bodies are connected to the first confluence flow channel, and the outlet ends of the plurality of first plates bodies are connected to the second confluence flow channel.

17. The battery device as claimed in claim 15, characterized in that, The second direction is parallel to the length direction of the heat exchange channel.

18. The battery device as claimed in claim 15, characterized in that, The surface of the support plate facing the battery cell assembly along the first direction is planar, and the flow channel plate is stacked on the surface of the support plate facing away from the battery cell assembly along the first direction.

19. The battery device according to any one of claims 1-7, characterized in that, The housing also includes a protective component, which is disposed on the side of the heat exchange component facing away from the battery cell assembly along the first direction, and the protective component is connected to the frame.

20. The battery device as claimed in claim 19, characterized in that, The protective component further includes a protective body and a support body. The protective body is disposed on the side of the heat exchange component facing away from the battery cell assembly along the first direction. The protective body is connected to the frame, and the support body abuts against the protective body and the heat exchange component.

21. An electrical appliance, characterized in that, The electrical equipment includes a battery device as described in any one of claims 1-20.

22. An energy storage device, characterized in that, The energy storage device includes the battery device as described in any one of claims 1-20.

23. An energy storage system, characterized in that, The energy storage system includes the energy storage device as described in claim 22.

24. A charging network, characterized in that, The charging network includes the energy storage device as described in claim 22.

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