Battery device, energy storage device and power utilization device

Abstract

The utility model is suitable for the technical field of batteries, and provides a battery device, an energy storage device and a power utilization device. The battery monomer comprises a shell and an electrode terminal, the shell comprises an end surface and a bottom surface which are oppositely arranged, the shell further comprises a side surface, and the electrode terminal is arranged on the end surface; a plurality of battery monomers are arranged, the plurality of battery monomers are at least arranged along a first direction, the plurality of battery monomers comprise a first battery monomer and a second battery monomer, and the end surfaces of the first battery monomer and the second battery monomer face opposite directions; the heat exchange assembly comprises a main body part, the main body part comprises a first section and a second section which are sequentially and alternately connected in the first direction, the first section is connected to the side face, and the second section is connected to the bottom face; according to the battery device provided by the embodiment of the invention, the battery monomers are arranged in different directions, and different parts of the heat exchange assembly can be connected with the side surfaces and the bottom surfaces of the battery monomers respectively, so that the heat exchange efficiency of the heat exchange assembly is improved.

Description

Technical Field

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

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

[0003] Battery devices generate a significant amount of heat during charging and discharging. The charge-discharge cycle efficiency of individual battery cells decreases under high temperatures, and in severe cases, may even lead to thermal runaway. Current battery devices suffer from poor cooling performance. Utility Model Content

[0004] In view of the above problems, this application provides a battery device, an energy storage device, and an electrical device that can alleviate the problem of decreased efficiency and safety caused by the temperature rise during the charging and discharging of individual battery cells.

[0005] In a first aspect, embodiments of this application provide a battery device, comprising:

[0006] A housing; a battery cell housed within the housing, the battery cell including a shell and electrode terminals disposed on the shell, the shell including an end face and a bottom face disposed opposite to each other, the shell also including a side face disposed around the periphery of the shell, the two ends of the side face being connected to the end face and the bottom face respectively, the electrode terminals being disposed on the end face; multiple battery cells, the multiple battery cells being arranged at least along a first direction, the multiple battery cells including a first battery cell and a second battery cell, and the end faces of the first battery cell and the end faces of the second battery cell having opposite orientations; a heat exchange assembly including a main body, the main body having a flow channel for the flow of heat exchange medium; the main body including a first section and a second section alternately connected in sequence along the first direction, the first section being connected to the side face and the second section being connected to the bottom face.

[0007] In the technical solution of this embodiment, the battery cells are arranged in different directions, and different parts of the heat exchange component can be connected to the side and bottom surfaces of the battery cells respectively, so that the heat exchange component can exchange heat with different positions of the battery cells, thereby increasing the heat exchange area between the heat exchange component and the battery cells and improving the heat exchange efficiency of the heat exchange component.

[0008] In some embodiments, the heat exchange assembly further includes a connector located at at least one end of the main body.

[0009] In the technical solution of this embodiment, the heat exchange component includes a connector so that the main body can be connected to the external structure through the connector, thereby facilitating the entry of the heat exchange medium into the main body or its discharge from the main body.

[0010] In some embodiments, there are two connectors, and the two connectors are respectively located on opposite sides of the main body along a first direction.

[0011] In the technical solution of this embodiment, since each first segment and each second segment are interconnected, and the first segment and the second segment can exchange heat with different parts of the battery cell respectively, the heat exchange assembly only needs two joints to allow the heat exchange medium to enter the main body and exit the main body respectively, which reduces the number of joints, reduces the risk of heat exchange medium leakage at the joints, and simplifies the structure of the heat exchange assembly.

[0012] In some embodiments, a partition plate is provided inside the main body, the length direction of the partition plate being the same as the extension direction of the flow channel; the partition plate divides the flow channel into multiple sub-flow channels.

[0013] In this embodiment, a partition plate is provided inside the main body to divide the flow channel into multiple sub-flow channels, so that the heat exchange medium can flow better inside the main body and reduce the risk of turbulence inside the main body; at the same time, the partition plate can also improve the strength of the main body so that the main body can also provide support for adjacent battery cells.

[0014] In some embodiments, the side includes two oppositely arranged first side surfaces and two oppositely arranged second side surfaces, and the first side surfaces and second side surfaces are connected end to end in sequence, with the area of ​​the first side surface being larger than the area of ​​the second side surface; the two first side surfaces are arranged along a first direction, and a first segment is connected to the first side surface.

[0015] In the technical solution of this embodiment, the side includes a first side and a second side, the area of ​​the first side is larger than the area of ​​the second side, and the first segment is connected to the first side to increase the contact area between the main body and the battery cell, thereby enabling the heat exchange component to better exchange heat with the battery cell.

[0016] In some embodiments, the first battery cell and the second battery cell are arranged alternately along a first direction, and the two opposite sides of any battery cell are respectively connected to the first segment.

[0017] In the technical solution of this embodiment, the first battery cell and the second battery cell are arranged alternately, so that the opposite two sides of any battery cell are respectively connected to the first segment, and the bottom surface of any battery cell is connected to the second segment. That is, each battery cell has three surfaces that exchange heat with the main body, which increases the heat exchange area between the battery cell and the main body and improves the heat exchange effect of the heat exchange assembly.

[0018] In some embodiments, the housing includes a top structure and a bottom structure, with individual battery cells disposed between the top structure and the bottom structure; the end face of the first battery cell faces the top structure, and the end face of the second battery cell faces the bottom structure.

[0019] The technical solution of this embodiment provides some specific arrangement of battery cells, such that the end face of the first battery cell faces the top structure and the end face of the second battery cell faces the bottom structure, so as to facilitate the arrangement of the first and second sections and increase the heat exchange area between the battery cell and the main body.

[0020] In some embodiments, the battery device further includes a bracket disposed on the bottom structure, with individual battery cells disposed on the bracket.

[0021] In the technical solution of this embodiment, a bracket is provided to support and hold the battery cells, thereby facilitating the installation of the battery cells.

[0022] In some embodiments, the battery cell further includes a pressure relief structure disposed on the end face, and the bracket is provided with a through hole, which is opposite to the pressure relief structure of the second battery cell.

[0023] In the technical solution of this embodiment, a through hole is provided on the bracket and is positioned opposite to the pressure relief structure of the second battery cell. In the event of thermal runaway of the battery cell, this arrangement allows the high-temperature and high-pressure flue gas generated by the thermal runaway of the second battery cell to flow through the through hole to the space between the bracket and the bottom structure. This reduces the negative impact of the bracket on the pressure relief performance of the pressure relief structure and also reduces the negative impact of the high-temperature and high-pressure flue gas generated by the thermal runaway of the second battery cell on other adjacent battery cells.

[0024] In some embodiments, the battery device further includes a support member, one end of which is connected to the end face of the second battery cell, and the other end of which is connected to a bracket, such that the end face is spaced apart from the bracket.

[0025] In the technical solution of this embodiment, a support member is provided to support the battery cell, thereby making the battery cell and the bracket spaced apart to reduce the collision and friction damage that may occur between the electrode terminals and the bracket; at the same time, the support member can also provide space for the electrical connection structure (such as a plate) between the electrode terminals.

[0026] In some embodiments, the housing includes a housing body and an end cap, the housing body having a cavity; the end cap is connected to the housing body and closes the cavity, with its end face located on the side of the end cap away from the cavity; at least a portion of the support member is disposed opposite to the side wall of the housing body of the corresponding second battery cell.

[0027] In the technical solution of this embodiment, the support member is positioned opposite to the side wall of the housing body so that the force provided by the support member to the battery cell can be transmitted to the housing body. This reduces the force on the end cap, lowers the risk of end cap deformation, and also allows the support member to better support the battery cell.

[0028] In some embodiments, the battery cell further includes an intermediate structure disposed on the housing, the intermediate structure being disposed between the bottom surface and / or the side surface and the main body; the intermediate structure is used to connect the main body to the housing, and / or the intermediate structure is used to separate the main body from the housing; and / or the intermediate structure is used to transfer heat from the housing to the main body.

[0029] In the technical solution of this embodiment, an intermediate structure is provided between the main body and the shell to transfer heat through the intermediate structure, or to separate the main body and the battery cell through the intermediate structure, or to fix the main body to the shell through the intermediate structure.

[0030] In some embodiments, the intermediate structure includes an insulating layer connected to the housing.

[0031] In the technical solution of this embodiment, the intermediate structure can insulate and separate the main body and the battery cell to reduce the damage to the battery cell that may be caused by heat exchange medium leakage, and also reduce the risk of damage to the battery cell caused by short circuit between the main body and the battery cell.

[0032] In some embodiments, the intermediate structure includes an adhesive layer, one side of which is directly connected to the main body and the other side of which is directly or indirectly connected to the housing.

[0033] In the technical solution of this embodiment, the main body is connected to the battery cell through an intermediate structure so that the heat exchange component can be stably connected to each battery cell.

[0034] In some embodiments, the adhesive layer is a thermally conductive layer.

[0035] In the technical solution of this embodiment, the heat of the shell is transferred to the main body through the intermediate structure, so that the heat exchange component can better exchange heat with the battery cells and improve the heat exchange efficiency of the heat exchange component.

[0036] In some embodiments, a plurality of battery cells are further arranged along a second direction, which is at an angle to the first direction.

[0037] The technical solution of this embodiment provides some battery cell arrangement methods, so that each battery cell is arranged along a first direction and a second direction, so that the box can accommodate more battery cells.

[0038] In some embodiments, the battery device includes a heat exchange assembly, wherein in a second direction, the size of the main body is greater than or equal to the sum of the sizes of a row of battery cells arranged in the second direction.

[0039] The technical solution of this embodiment provides some dimensions of the main body so that the main body can cover each battery cell along the second direction. At this time, only one heat exchange component can be set in the box, thereby reducing the number of joints and reducing the risk of heat exchange medium leakage at the joints.

[0040] In some embodiments, the battery device includes at least two heat exchange components, wherein in a second direction, the sum of the dimensions of each main body portion is greater than or equal to the sum of the dimensions of a row of battery cells arranged in a row along the second direction.

[0041] The technical solution of this embodiment provides the dimensions of some other main parts so that the battery device includes multiple heat exchange components and one heat exchange component is only opposite to a portion of the battery cells, thereby facilitating the control of different heat exchange components according to different operating conditions and enabling more flexible control.

[0042] In some embodiments, in any column of battery cells arranged along the second direction, the first battery cell and the second battery cell are alternately arranged along the second direction.

[0043] The technical solution of this embodiment provides some battery cell arrangement directions so that the periphery of each first battery cell is a second battery cell, and the periphery of each second battery cell is a first battery cell, thereby reducing the damage that thermal runaway of a battery cell may cause to adjacent battery cells.

[0044] In some embodiments, the electrode terminals of each first battery cell and the electrode terminals of each second battery cell are connected by different electrical connection structures.

[0045] The technical approach of this embodiment provides several connection methods for each battery cell. Since the electrode terminals of the first battery cell and the second battery cell are oriented differently, each first battery cell and each second battery cell are connected through different electrical connection structures to simplify the structure and reduce the connection difficulty.

[0046] Secondly, embodiments of this application also provide an energy storage device, including a battery device provided in some embodiments of the first aspect, the battery device being used to store or provide electrical energy.

[0047] Thirdly, embodiments of this application also provide an electrical device, including a battery device provided in some embodiments of the first aspect, or an energy storage device provided in some embodiments of the second aspect, wherein the battery device is used to store or provide electrical energy.

[0048] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0049] 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.

[0050] Figure 1 This application provides structural schematic diagrams of vehicles for some embodiments;

[0051] Figure 2 This is an exploded view of the battery device provided in some embodiments of this application;

[0052] Figure 3 This is an exploded structural diagram of a battery cell provided in some embodiments of this application;

[0053] Figure 4 A top view of the battery device after removing the casing, provided in some embodiments of this application;

[0054] Figure 5 This is a front view of the battery device after removing the casing, as provided in some embodiments of this application.

[0055] Figure 6 for Figure 4 Cross-sectional view at line AA;

[0056] Figure 7 for Figure 5 Cross-sectional view at the middle BB line;

[0057] Figure 8 A top view of a bracket provided in some embodiments of this application;

[0058] Figure 9 Battery devices provided in some embodiments of this application Figure 6 A magnified view of a portion of point C in the middle;

[0059] Figure 10 Battery devices provided for other embodiments of this application Figure 6 A magnified view of a portion of point C in the middle;

[0060] Figure 11 for Figure 10A magnified view of a portion of point D in the middle;

[0061] Figure 12 This is a top view of the battery device after removing the casing, as provided in some other embodiments of this application.

[0062] The markings in the diagram mean:

[0063] 1000, vehicles;

[0064] 100. Battery device;

[0065] 10. Box body; 11. First box body; 111. Top structure; 12. Second box body; 121. Bottom structure;

[0066] 20. Battery cell; 201. First battery cell; 202. Second battery cell; 21. Housing; 211. End cap; 2111. End face; 212. Housing body; 2121. Side; 2121a. First side; 2121b. Second side; 2122. Bottom; 2123. Cavity; 22. Electrode assembly; 23. Electrode terminal; 24. Pressure relief structure;

[0067] 30. Heat exchange assembly; 31. Main body; 311. Flow channel; 3111. Sub-flow channel; 312. First section; 313. Second section; 314. Partition plate; 32. Connector;

[0068] 40. Bracket; 41. Through hole;

[0069] 50. Support components;

[0070] 60. Intermediate structure; 61. Insulating layer; 62. Adhesive layer;

[0071] 200. Motor;

[0072] 300. Controller. Detailed Implementation

[0073] 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.

[0074] 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.

[0075] 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.

[0076] 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.

[0077] 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.

[0078] 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).

[0079] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0080] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0081] Currently, judging from market trends, the application of power batteries is becoming increasingly widespread. Power batteries are not only used in energy storage systems such as hydropower, thermal power, wind power, and solar power plants, but also extensively used in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in military equipment and aerospace. With the continuous expansion of power battery applications, market demand is also constantly increasing.

[0082] Individual battery cells in a battery device are susceptible to environmental influences, particularly ambient temperature. For example, the performance of a battery cell will decrease in high or low temperature environments compared to normal temperature environments. Furthermore, prolonged charging and discharging of battery cells in high-temperature environments increases the risk of thermal runaway, thereby raising safety risks.

[0083] Battery cells tend to generate a lot of heat during charging and discharging, and as the battery device is used, the battery cells are prone to a decrease in charge-discharge cycle efficiency.

[0084] To mitigate the negative impact of high-temperature environments on the charging and discharging efficiency of individual battery cells, temperature management structures can be incorporated into the battery pack to control the temperature of the individual cells. Current battery packs typically include cooling structures such as cold plates to lower the temperature of the individual cells and slow down the rate of temperature rise. However, most current cold plates can only contact or approach one side of the battery cell, resulting in a small heat exchange area between the cold plate and a single battery cell, thus limiting the cooling effect.

[0085] Currently, another approach involves placing a cold plate between two adjacent rows of battery cells. In this case, each battery cell has two surfaces in contact with or close to the cold plate, increasing the heat exchange area between the cold plate and the individual battery cell. However, this approach results in a large number of cold plate joints in the battery device. Compared to other locations on the cold plate, the risk of leakage is higher at these joints. The more joints there are, the higher the risk of leakage. Leakage from the cold plate can easily lead to short circuits and other malfunctions in the battery device, negatively impacting its stability and safety.

[0086] Based on the above considerations, in order to alleviate the problem of decreased efficiency and safety caused by the temperature rise during the charging and discharging of battery cells, this application provides a battery device in which multiple battery cells include a first battery cell and a second battery cell, and the first battery cell and the second battery cell are oriented in opposite directions; the heat exchange component includes a first segment and a second segment that are alternately connected in sequence, and the first segment and the second segment correspond to the side and bottom surfaces of the battery cells, respectively.

[0087] In such a battery cell, the heat exchange assembly can exchange heat with both the side and bottom surfaces of the cell simultaneously, increasing the heat exchange area, improving heat exchange efficiency, reducing the risk of thermal runaway in the battery device, and also enabling better temperature management of the battery device, facilitating improved charge-discharge cycle efficiency of the battery cells. Furthermore, by including multiple sequentially alternating first and second sections in the heat exchange assembly, one or a small number of heat exchange components can exchange heat with each battery cell in the battery device, reducing the number of joints, lowering the risk of leakage, and reducing the risk of short circuits and other malfunctions in the battery device, further improving the safety of the battery device.

[0088] 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.

[0089] For ease of explanation, the following embodiments will be described using a vehicle 1000 as an example of an electrical device according to an embodiment of this application.

[0090] refer to Figure 1 , Figure 1 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. A battery is installed inside the vehicle 1000, and the battery can be located at the bottom, front, or rear of the vehicle 1000. The battery can be used to power the vehicle 1000; for example, the battery can serve as the operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 300 and a motor 200. The controller 300 is used to control the battery to supply power to the motor 200, for example, to meet the power needs of the vehicle 1000 during starting, navigation, and driving.

[0091] In some embodiments of this application, the battery 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.

[0092] refer to Figure 2 , Figure 2 This is an exploded structural diagram of a battery device 100 provided in some embodiments of this application.

[0093] The battery device 100 mentioned in the embodiments of this application may include one or more battery assemblies for providing voltage and capacity. The battery assembly may include multiple battery cells 20, which are connected in series, parallel, or mixed connection via a busbar.

[0094] In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells 20.

[0095] As an example, the battery assembly can be a battery module, which consists of multiple battery cells 20 arranged and fixed together to form an independent module. As an example, a battery module can also be formed by bundling multiple battery cells 20 together with cable ties.

[0096] In some embodiments, the battery assembly may be a battery pack, which includes a housing 10 and one or more battery assemblies housed within the housing 10.

[0097] As an example, the battery assembly can be a battery module, which can be housed in the housing 10 by fixing the battery module in the housing 10.

[0098] As an example, the battery assembly can also be housed in the housing 10 by directly fixing multiple battery cells 20 to the housing 10.

[0099] As an example, the housing 10 may include a first housing 11 and a second housing 12. The first housing 11 and the second housing 12 are fastened together to form a closed space inside the housing 10 for housing the battery assembly. Here, "closed" refers to covering or closing, and can be either sealed or unsealed. The first housing 11 may be a top cover or a bottom plate.

[0100] As an example, the housing 10 may include a top cover, a frame, and a bottom plate. The top cover and the bottom plate are respectively connected to the frame, so that the interior of the housing 10 forms an enclosed space to house the battery assembly.

[0101] In some embodiments, the housing 10 may be part of the chassis structure of the vehicle 1000. For example, a portion of the housing 10 may be at least a portion of the floor of the vehicle 1000, or a portion of the housing 10 may be at least a portion of the crossbeams and longitudinal beams of the vehicle 1000.

[0102] refer to Figure 3 , Figure 3This is an exploded structural diagram of a battery cell 20 provided in some embodiments of this application. A battery cell 20 refers to the smallest unit that makes up a battery. As shown, the battery cell 20 includes a housing 21, an electrode assembly 22, and other functional components; the housing 21 includes a housing body 212 and an end cap 211.

[0103] End cap 211 refers to a component that covers the opening of the housing body 212 to isolate the internal environment of the battery cell 20 from the external environment. The shape of end cap 211 can be adapted to the shape of the housing body 212 to fit it. Optionally, end cap 211 can be made of a material with a certain hardness and strength (such as aluminum alloy), so that end cap 211 is not easily deformed under pressure and impact, allowing the battery cell 20 to have higher structural strength and improved safety performance. Functional components such as electrode terminals 23 can be provided on end cap 211. Electrode terminals 23 can be used for electrical connection with electrode assembly 22 for outputting or inputting electrical energy into the battery cell 20. In some embodiments, end cap 211 can also be provided with a pressure relief mechanism for releasing internal pressure when the internal pressure or temperature of the battery cell 20 reaches a threshold. The material of end cap 211 can also be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and this application embodiment does not impose any special limitations on this. In some embodiments, an insulating element may be provided on the inner side of the end cap 211. The insulating element can be used to isolate the electrical connection components within the housing body 212 from the end cap 211 to reduce the risk of short circuits. For example, the insulating element may be made of plastic, rubber, etc.

[0104] The housing body 212 is an assembly used to cooperate with the end cap 211 to form the internal environment of the battery cell 20. This internal environment can accommodate the electrode assembly 22, electrolyte, and other components. The housing body 212 and the end cap 211 can be independent components. An opening can be provided on the housing body 212, and the end cap 211 can be used to close the opening to form the internal environment of the battery cell 20. Alternatively, the end cap 211 and the housing body 212 can be integrated. Specifically, the end cap 211 and the housing body 212 can form a common connecting surface before other components are inserted into the housing. When it is necessary to encapsulate the interior of the housing body 212, the end cap 211 closes the housing body 212. The housing body 212 can have various shapes and sizes, such as cuboid, cylindrical, or hexagonal prism. Specifically, the shape of the housing body 212 can be determined according to the specific shape and size of the electrode assembly 22. The material of the shell body 212 can be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc. This application embodiment does not impose any special restrictions on this.

[0105] Electrode assembly 22 is the component in the battery cell 20 where electrochemical reactions occur. The casing 21 may contain one or more electrode assemblies 22. The electrode assembly 22 is mainly formed by winding or stacking positive and negative electrode sheets, and typically a separator is provided between the positive and negative electrode sheets. The portions of the positive and negative electrode sheets containing active material constitute the main body of the electrode assembly 22, while the portions of the positive and negative electrode sheets without active material each constitute a tab. The positive and negative tabs may be located together at one end of the main body or separately at both ends of the main body. During the charging and discharging process of the battery, the positive and negative active materials react with the electrolyte, and the tabs connect to the electrode terminals 23 to form a current loop.

[0106] Firstly, reference Figures 2 to 5 This application provides a battery device 100 in some embodiments, including a housing 10, battery cells 20, and a heat exchange assembly 30. The battery cells 20 are housed within the housing 10 and include a casing 21 and electrode terminals 23 disposed on the casing 21. The casing 21 includes an end face 2111 and a bottom face 2122 disposed opposite to each other. The casing 21 also includes a side face 2121 surrounding the casing 21, with its two ends connected to the end face 2111 and the bottom face 2122, respectively. The electrode terminals 23 are disposed on the end face 2111. Multiple battery cells 20 are provided, arranged at least along a first direction, and each battery cell 20 includes a first battery cell 20. 01 and second battery cell 202, and the end face 2111 of the first battery cell 201 and the end face 2111 of the second battery cell 202 are oriented oppositely; the heat exchange assembly 30 includes a main body 31, and the main body 31 is provided with a flow channel 311 for the heat exchange medium to flow through; the main body 31 includes a first segment 312 and a second segment 313 that are alternately connected in a first direction, the first segment 312 is connected to the side 2121 and is located between the first battery cell 201 and the adjacent second battery cell 202, and the second segment 313 is connected to the bottom surface 2122.

[0107] In the figure, the X-axis is the length direction of the battery device 100, the Y-axis is the width direction of the battery device 100, and the Z-axis is the height direction of the battery device 100.

[0108] The housing 10 refers to the structure in the battery device 100 used to provide a fixed foundation for the battery cell 20 or other structures. The housing 10 can be prismatic, cylindrical or other shapes. The material of the housing 10 can include metal, plastic or other materials.

[0109] The battery cell 20 is the smallest unit that makes up the battery device 100. The shape of the battery cell 20 can be cuboid, cylindrical or other shapes. There can be multiple battery cells 20, that is, there can be two, three or more battery cells 20.

[0110] Multiple battery cells 20 are arranged at least along a first direction, that is, multiple battery cells 20 can be arranged only along the first direction, or they can be arranged along the first direction and other directions at the same time, or they can be arranged in an array along multiple other different directions to form an array structure arranged in multiple directions; the first direction can be the length direction X of the battery device 100, or the width direction Y of the battery device 100 or other directions.

[0111] For example, the first direction can be the length direction X of the battery device 100. In this case, multiple battery cells 20 are simultaneously arranged in an array along the length direction X and the width direction Y of the battery device 100.

[0112] The battery cell 20 includes a housing 21, on which electrode terminals 23 are provided.

[0113] The housing 21 includes a bottom surface 2122 and an end surface 2111 disposed opposite to each other. The end surface 2111 refers to the surface of the housing 21 where electrode terminals 23 and pressure relief structures 24 are located; for example, when multiple battery cells 20 are connected by an electrical connection structure, the end surface 2111 also refers to the surface of the housing 21 facing the electrical connection structure. The bottom surface 2122 refers to the surface of the housing 21 that is spaced apart from the end surface 2111, and the bottom surface 2122 can be the surface where the housing 21 connects to the casing 10.

[0114] The shell 21 also includes side surfaces 2121, which are the surfaces surrounding the shell. Each side surface 2121 is arranged around the periphery of the shell 21, and the two ends of each side surface 2121 are connected to the end surface 2111 and the bottom surface 2122, respectively, thereby forming the outer surface of the shell 21. Depending on the shape of the shell 21, the side surface 2121 can be a flat surface or an arc surface; for example, when the shell 21 has a prismatic structure, the side surface 2121 can be flat; when the shell 21 has a cylindrical structure, the side surface 2121 can be an arc surface.

[0115] The plurality of battery cells 20 includes a first battery cell 201 and a second battery cell 202, wherein the first battery cell 201 and the second battery cell 202 are battery cells 20 with end faces 2111 facing opposite directions, that is, the end faces 2111 of the first battery cell 201 and the end faces 2111 of the second battery cell 202 face two opposite inner surfaces of the housing 10, respectively. Depending on the arrangement of the battery cells 20, the orientation of the first battery cell 201 and the second battery cell 202 can be in the length direction X of the battery device 100, or in the width direction Y or height direction Z of the battery device 100. For example, when the height direction of the battery cell 20 is parallel to the height direction Z of the battery device 100, the end face 2111 of the first battery cell 201 faces upward, and the end face 2111 of the second battery cell 202 faces downward.

[0116] Depending on the arrangement of the battery cells 20, the first battery cell 201 and the second battery cell 202 can have multiple arrangement methods.

[0117] For example, when each battery cell 20 is arranged along the first direction, the first battery cell 201 and the second battery cell 202 can be arranged alternately along the first direction.

[0118] For example, when each battery cell 20 is arranged along a first direction, a first battery cell group and a second battery cell group can be set up, and the first battery cell group and the second battery cell group can be arranged alternately along the first direction; wherein, the first battery cell group may include two or more sequentially adjacent first battery cells 201; the second battery cell group may also include two or more sequentially adjacent second battery cells 202.

[0119] The heat exchange component 30 refers to the structure in the battery device 100 used to control the heat exchange with the battery cells 20. Because the battery cells 20 easily generate a lot of heat during use, which can easily lead to a high temperature inside the housing 10, and a high ambient temperature can easily lead to a decrease in the charging and discharging efficiency of the battery cells 20, the heat exchange component 30 is mainly used to reduce the temperature of each battery cell 20 and can also reduce the ambient temperature inside the housing 10. However, under certain operating conditions, the heat exchange component 30 can also play the role of raising the temperature of the battery cells 20. The heat exchange component 30 can exchange heat with the battery cells 20 through a flowing heat exchange medium, which can be a gas, liquid, or other medium.

[0120] The main body 31 refers to the structure in the heat exchange assembly 30 used to carry the heat exchange medium. The main body 31 can be a cylindrical structure, a polygonal prism structure, a plate structure, or other shapes. The material of the main body 31 can include metal, plastic, or other materials.

[0121] The flow channel 311 refers to the structure inside the main body 31 used for the flow of heat exchange medium. The flow channel 311 is provided inside the main body 31. There may be only one flow channel 311 inside the main body 31, or there may be two or more flow channels 311. The flow channel 311 can be a straight structure or a curved structure extending along a reference straight line. In the direction perpendicular to the flow direction of the heat exchange medium, the cross-sectional shape of the flow channel 311 can be circular, polygonal or other shapes.

[0122] Understandably, the heat exchange medium in the main body 31 needs to exchange heat with the adjacent battery cell 20 through the side wall of the main body 31, so the main body 31 should have thermal conductivity; for example, the material of the main body 31 may include aluminum or aluminum alloy, and the aluminum alloy may include aluminum-manganese alloy, aluminum-magnesium-manganese alloy, etc.

[0123] The first segment 312 and the second segment 313 are partial structures of the main body 31.

[0124] The first segment 312 and the second segment 313 are connected alternately along the first direction; the number of the first segment 312 can be one, two or more, and the number of the second segment 313 can be one, two or more. The number of the first segment 312 and the second segment 313 can be equal or unequal. The first segment 312 and the second segment 313 can be connected by welding, bonding or other methods. Each first segment 312 and each second segment 313 can also be integrally formed.

[0125] In the case where the main body 31 includes a plurality of first sections 312 and a plurality of second sections 313, the flow channel 311 passes through each first section 312 and each second section 313 so that the heat exchange medium can flow through each first section 312 and each second section 313 to exchange heat with the battery cells 20 adjacent to each first section 312 and each second section 313.

[0126] The first segment 312 is connected to the side 2121 so that the heat exchange medium flowing through the first segment 312 can exchange heat with the battery cell 20 on the side 2121. The first segment 312 can be directly connected to the side 2121 by welding, bonding or other means, or a heat-conducting layer or other intermediate structure can be set between the first segment 312 and the side 2121 so that the first segment 312 is indirectly connected to the battery cell 20.

[0127] The first segment 312 can cover the entire side 2121, or it can only cover a part of the adjacent side 2121. For example, when the first segment 312 covers the entire side 2121, the flow channel 311 in the first segment 312 can also cover the entire side 2121. In this case, the heat exchange medium can exchange heat with the battery cell 20 on the entire side 2121, so that the first segment 312 and the adjacent side 2121 have a large heat exchange area.

[0128] The second segment 313 is connected to the bottom surface 2122 so that the heat exchange medium flowing through the second segment 313 can exchange heat with the battery cell 20 at the bottom surface 2122. The second segment 313 can be directly connected to the bottom surface 2122 by welding, bonding or other means, or a heat-conducting layer or other intermediate structure can be set between the second segment 313 and the bottom surface 2122 so that the second segment 313 is indirectly connected to the battery cell 20.

[0129] The second segment 313 can cover the entire bottom surface 2122, or it can only cover a part of the adjacent bottom surface 2122. For example, when the second segment 313 covers the entire bottom surface 2122, the flow channel 311 in the second segment 313 can also cover the entire bottom surface 2122. In this case, the heat exchange medium can exchange heat with the battery cell 20 on the entire bottom surface 2122, so that the second segment 313 and the adjacent bottom surface 2122 have a large heat exchange area.

[0130] The first segment 312 is located between the first battery cell 201 and the adjacent second battery cell 202. Since the end faces 2111 of the first battery cell 201 and the second battery cell 202 face different orientations, and electrode terminals 23 are provided on the end faces 2111, that is, an electrical connection structure connected to the electrode terminals 23 is provided on one side of the end face 2111 of the battery cell 20 to electrically connect each battery cell 20; if the first segment 312 is arranged between two adjacent first battery cells 201 or two adjacent second battery cells 202, at least one of the two second segments 313 on both sides of the first segment 312 will correspond to the end face 2111. In this case, the second segments 313 and the electrical connection structure are prone to mutual interference; however, by placing the first segment 312 between the first battery cell 201 and the adjacent second battery cell 202, the two second segments 313 on both sides of the first segment 312 can respectively correspond to the bottom surfaces 2122 of the first battery cell 201 and the second battery cell 202, reducing the difficulty of arrangement and also reducing mutual interference between structures.

[0131] For example, when the first battery cell 201 and the second battery cell 202 are arranged alternately along the first direction, a first segment 312 is provided between each two adjacent battery cells 20; for example, when the first battery cell group and the second battery cell group are arranged alternately along the first direction, and the first battery cell group includes at least two first battery cells 201 and the second battery cell group includes at least two second battery cells 202, the first segment 312 is located between the first battery cell group and the second battery cell group.

[0132] In this embodiment, the battery cells 20 are arranged in different directions, and different parts of the heat exchange assembly 30 can be connected to the side surface 2121 and bottom surface 2122 of the battery cells 20 respectively. This allows the heat exchange assembly 30 to exchange heat with different positions of the battery cells 20, increasing the heat exchange area between the heat exchange assembly 30 and the battery cells 20, improving the heat exchange efficiency of the heat exchange assembly 30, reducing the risk of thermal runaway of the battery device 100, and also enabling better temperature management of the battery device 100, which facilitates improving the charge and discharge cycle efficiency of the battery cells 20. At the same time, the heat exchange assembly 30 includes multiple sequentially and alternately connected first segments 312 and second segments 313, so that one or a few heat exchange assemblies 30 can exchange heat with each battery cell 20 in the battery device 100. This reduces the number of joints 32, reduces the risk of leakage, reduces the risk of short circuits and other faults in the battery device 100, and further improves the safety of the battery device 100.

[0133] The heat exchange component 30 provided in this embodiment can better control the temperature of the battery cell 20. At this time, the battery cell 20 can be a battery cell with high heat generation but also high charge and discharge cycle efficiency. For example, the battery cell 20 can be a high-nickel 8-series battery cell. In the high-nickel 8-series battery cell, the ratio of nickel, cobalt and manganese in the nickel-cobalt-manganese ternary cathode material is 8:1:1.

[0134] refer to Figures 4 to 6 In some embodiments, the heat exchange assembly 30 further includes a connector 32 disposed at at least one end of the main body 31.

[0135] The connector 32 refers to the structure in the heat exchange assembly 30 used to connect the flow channel 311 in the main body 31 with external equipment. The external equipment may include structures such as pumps, air compressors, and heat exchangers. The heat exchange medium in the flow channel 311 can flow to the outside of the flow channel 311 through the connector 32, and the external equipment can also provide heat exchange medium to the flow channel 311 through the connector 32. The connector 32 can be a threaded connector, a flange connector, a clamp connector, or other connectors.

[0136] Depending on the structure of the main body 31, the connector 32 can be connected to the first segment 312 or the second segment 313; the connector 32 can be located at one end of the main body 31 or at the opposite end of the main body 31; the connector 32 can be connected to the first segment 312 or the second segment 313 by welding, bonding or other means, and the connector 32 can also be integrally formed with the connected first segment 312 or second segment 313.

[0137] The number of connectors 32 can be one, two, or more. For example, when there is only one connector 32, the heat exchange medium in the flow channel 311 flows out to the external equipment through the connector 32, and the external equipment also supplies heat exchange medium to the flow channel 311 through the connector 32. For example, when there are two or more connectors 32, one or more of the connectors 32 can be used as the discharge end so that the heat exchange medium in the flow channel 311 can flow out of the flow channel 311, and one or more of the connectors 32 can be used as the feed end so that the external equipment can supply heat exchange medium to the flow channel 311.

[0138] Understandably, since the first segment 312 and the second segment 313 in the main body 31 are connected alternately in sequence, the joint 32 should not be located between the first segment 312 and the second segment 313. Therefore, the joint 32 can be located at one end or both ends of the main body 31.

[0139] In this embodiment, the heat exchange assembly 30 includes a connector 32 so that the main body 31 can be connected to the external structure through the connector 32, thereby facilitating the entry of the heat exchange medium into the main body 31 or its discharge from the main body 31. Since the heat exchange assembly includes multiple sequentially connected first segments 312 and second segments 313, the number of connectors 32 in the heat exchange assembly 30 can be reduced, provided that the heat exchange assembly 30 can exchange heat with each battery cell 20, thereby reducing the risk of heat exchange medium leakage.

[0140] refer to Figures 4 to 6 In some embodiments, there are two connectors 32, and the two connectors 32 are respectively located at opposite ends of the main body 31.

[0141] There are two connectors 32. One of the two connectors 32 can be used as the feed end, and the other of the two connectors 32 can be used as the discharge end. At this time, the heat exchange medium flows in the flow channel 311 and exchanges heat with the battery cell 20 more efficiently through the flowing heat exchange medium, thereby better controlling the temperature of the battery cell 20.

[0142] In this embodiment, since each first segment 312 and each second segment 313 are interconnected, and the first segment 312 and the second segment 313 can exchange heat with different parts of the battery cell 20 respectively, the heat exchange assembly 30 only needs two connectors 32 to allow the heat exchange medium to enter the main body 31 and exit the main body 31 respectively. Compared with the method of setting one heat exchange assembly 30 between two adjacent rows of battery cells 20, this embodiment reduces the number of connectors 32, reduces the risk of heat exchange medium leakage at the connectors 32, and simplifies the structure of the heat exchange assembly 30.

[0143] refer to Figures 4 to 7In some embodiments, the main body 31 is provided with a partition plate 314, the length direction of the partition plate 314 is the same as the extension direction of the flow channel 311; the partition plate 314 divides the flow channel 311 into multiple sub-flow channels 3111.

[0144] The partition plate 314 refers to the plate structure disposed within the main body 31. The partition plate 314 can divide the flow channel 311 into multiple sub-flow channels 3111, each of which can be used for the flow of heat exchange medium. The number of partition plates 314 can be one, two or more. The partition plate 314 is connected to the main body 31 by means of welding, bonding or other methods. The partition plate 314 can also be integrally formed with the main body 31. The material of the partition plate 314 can include metal, plastic or other materials. The material of the partition plate 314 can be the same as or different from that of the main body 31.

[0145] The partition plate 314 can be a straight plate or a curved plate structure extending along a reference straight line. The length direction of the partition plate 314 is the same as the extension direction of the flow channel 311, which is the flow direction of the heat exchange medium within the flow channel 311. Due to the influence of the manufacturing process, the length direction of the partition plate 314 can be the same as or approximately the same as the extension direction of the flow channel 311. When the partition plate 314 is a curved plate structure extending along a reference straight line, the reference straight line of the partition plate 314 is the same as or approximately the same as the extension direction of the flow channel 311.

[0146] When the partition 314 includes a first segment 312 and a second segment 313, the partition 314 may extend into each of the first segment 312 and the second segment 313.

[0147] Each sub-channel 3111 can be disconnected from each other and connected to the connector 32 respectively. In this case, each sub-channel 3111 is connected in parallel and does not interfere with each other. The heat exchange medium can be provided to only a portion of the sub-channels 3111 as needed. The sub-channels 3111 can also be connected end to end to form a series structure. In this case, the heat exchange medium can flow through each sub-channel 3111 in sequence. The sub-channels 3111 can also be mixed, that is, a part of each channel 311 can be connected in series and another part can be connected in parallel.

[0148] In addition to dividing the flow channel 311 into multiple sub-flow channels 3111, the partition plate 314 can also provide support for the main body 31 to improve the strength of the main body 31.

[0149] Because the battery cells 20 are prone to expansion and contraction during charge and discharge cycles, and a portion of the main body 31 (e.g., the first segment 312) is located between two adjacent battery cells 20, the main body 31 is at risk of deformation under pressure when the battery cells 20 expand. This deformation could lead to blockage of the flow channels 311, negatively impacting the heat exchange efficiency of the heat exchange assembly 30. Therefore, the partition plate 314 can also improve the strength of the main body 31 and reduce the risk of deformation.

[0150] Because the battery cell 20 is prone to expansion and contraction during charge and discharge cycles, and the expansion of the battery cell 20 can negatively affect the charge and discharge performance of the battery cell 20, the partition plate 314 can also provide support for adjacent battery cells 20 to suppress the expansion of adjacent battery cells 20.

[0151] In this embodiment, a partition plate 314 is provided inside the main body 31 to divide the flow channel 311 into multiple sub-flow channels 3111, so that the heat exchange medium can flow better inside the main body 31 and reduce the risk of turbulence inside the main body 31; at the same time, the partition plate 314 can also improve the strength of the main body 31, so that the main body 31 can also provide support for the adjacent battery cells 20.

[0152] refer to Figures 3 to 5 In some embodiments, the side surface 2121 includes two oppositely arranged first side surfaces 2121a and two oppositely arranged second side surfaces 2121b, and the first side surfaces 2121a and the second side surfaces 2121b are connected end to end in sequence, and the area of ​​the first side surface 2121a is larger than the area of ​​the second side surface 2121b; the two first side surfaces 2121a are arranged along a first direction, and the first segment 312 is connected to the first side surface 2121a.

[0153] The first side 2121a and the second side 2121b are both sides 2121 of the shell 21. The two first side 2121a are arranged opposite each other, and the two second side 2121b are arranged opposite each other. The first side 2121a and the second side 2121b are connected end to end in sequence to form the circumferential side 2121 of the shell 21.

[0154] The area of ​​the first side 2121a is larger than the area of ​​the second side 2121b, that is, the first side 2121a is the larger surface of the shell 21 and the first side 2121a is also the larger surface of the battery cell 20; the two first sides 2121a are arranged along the first direction, that is, the width direction of the shell 21 is parallel to the first direction, and the first sides 2121a of two adjacent battery cells 20 are adjacent and opposite to each other.

[0155] The first segment 312 is connected to the first side 2121a, that is, the first segment 312 is connected to the surface of the housing 21 with a larger area; compared with connecting the first segment 312 to the second side 2121b, this arrangement can make the heat exchange area between the first segment 312 and the battery cell 20 larger, thereby enabling more efficient heat exchange with the battery cell 20.

[0156] In this embodiment, the side 2121 includes a first side 2121a and a second side 2121b, the area of ​​the first side 2121a is larger than the area of ​​the second side 2121b, and the first segment 312 is connected to the first side 2121a to increase the contact area between the main body 31 and the battery cell 20, thereby enabling the heat exchange assembly 30 to better exchange heat with the battery cell 20.

[0157] refer to Figures 4 to 6 In some embodiments, the first battery cell 201 and the second battery cell 202 are arranged alternately along the first direction, and different first segments 312 are connected to the two opposite sides 2121 of any battery cell 20.

[0158] Because the end faces 2111 of the first battery cell 201 and the second battery cell 202 have different orientations, and the first segment 312 is located between adjacent first battery cells 201 and second battery cells 202, the first battery cells 201 and the second battery cells 202 are arranged alternately in sequence so that each battery cell 20 can be connected to two first segments 312 and one second segment 313. That is, at least three faces of each battery cell 20 can exchange heat with the main body 31, which increases the heat exchange between the battery cell 20 and the heat exchange assembly 30 and improves the heat exchange efficiency.

[0159] For example, when the first segment 312 is connected to the first side 2121a of the battery cell 20, this arrangement enables the two first sides 2121a of each battery cell 20 to correspond to the first segment 312 respectively, and also enables the bottom surface 2122 of the battery cell 20 to correspond to the second segment 313. That is, the two first sides 2121a and the bottom surface 2122 of the battery cell 20 can exchange heat with the main body 31, which increases the heat exchange between the battery cell 20 and the heat exchange assembly 30 and improves the heat exchange efficiency.

[0160] In this embodiment, the first battery cell 201 and the second battery cell 202 are arranged alternately, so that the opposite two sides 2121 of any battery cell 20 are respectively connected to the first segment 312, and the bottom surface 2122 of any battery cell 20 is connected to the second segment 313. That is, each battery cell 20 has three surfaces that exchange heat with the main body 31, which increases the heat exchange area between the battery cell 20 and the main body 31 and improves the heat exchange effect of the heat exchange assembly 30.

[0161] refer to Figure 2 , Figures 4 to 6 In some embodiments, the housing 10 includes a top structure 111 and a bottom structure 121, with a battery cell 20 disposed between the top structure 111 and the bottom structure 121; the end face 2111 of the first battery cell 201 faces the top structure 111, and the end face 2111 of the second battery cell 202 faces the bottom structure 121.

[0162] The top structure 111 and the bottom structure 121 refer to the structures arranged along the height direction Z in the box 10.

[0163] The top structure 111 is used in conjunction with other structures of the housing 10 to form a closed internal environment to accommodate the battery cell 20; when the battery unit 100 serves as the floor of the vehicle 1000, the top structure 111 can also serve as the floor of the vehicle 1000 to carry occupants and items; when the housing 10 includes a first housing 11 and a second housing 12, the top structure 111 can be a part of the structure of the first housing 11; for example, the top structure 111 can be a top cover.

[0164] The bottom structure 121 is used to support the battery cell 20 and other structures in the housing 10, providing a fixed foundation and support for the battery cell 20 and other structures. When the housing 10 includes a first housing 11 and a second housing 12, the bottom structure 121 can be a part of the second housing 12. For example, the bottom structure 121 can be a base plate.

[0165] The first battery cell 201 faces the top structure 111, meaning the height direction of the first battery cell 201 is parallel to the height direction Z of the battery device 100; the second battery cell 202 faces the bottom structure 121, meaning the height direction of the second battery cell 202 is also parallel to the height direction Z of the battery device 100, so as to better utilize the space of the housing 10 in the height direction Z, which helps to reduce the space occupied by the battery cell 20 and improve the energy density.

[0166] Since the first segment 312 corresponds to the side 2121 of the battery cell 20 and the second segment 313 corresponds to the bottom surface 2122 of the battery cell 20, this arrangement also enables each of the second segments 313 of the main body 31 to be arranged in the height direction Z of the battery device 100, thereby making better use of the space of the housing 10 in the height direction Z and facilitating the arrangement of the main body 31.

[0167] This embodiment provides some specific arrangement of battery cells 20, such that the end face 2111 of the first battery cell 201 faces the top structure 111 and the end face 2111 of the second battery cell 202 faces the bottom structure 121, so as to facilitate the arrangement of the first section 312 and the second section 313 and to increase the heat exchange area between the battery cell 20 and the main body 31.

[0168] refer to Figure 4 , Figure 6 , Figure 8 , Figure 9 In some embodiments, the battery device 100 further includes a bracket 40 disposed on the bottom structure 121, and the battery cell 20 is disposed on the bracket 40.

[0169] The bracket 40 refers to the structure in the battery device 100 used to support the battery cell 20. The battery cell 20 can be installed on the bracket 40, which is installed on the housing 10, so that the battery cell 20 can be indirectly installed on the housing 10 with the bracket 40 as an intermediate structure 60. The battery cell 20 can be connected to the bracket 40 by welding, bonding, snap-fitting, etc.

[0170] The bracket 40 can be a frame structure, a platform structure, a column structure, or other shapes; the number of brackets 40 can be one, two, or more. Depending on the number of brackets 40, one bracket 40 can support only one battery cell 20 or support multiple battery cells 20; the material of the bracket 40 can include metal, plastic, or other materials.

[0171] When the end faces 2111 of the battery cells 20 are arranged along the height direction Z of the battery assembly 100, the bracket 40 is provided on the bottom structure 121 to support each battery cell 20; the bracket 40 can be connected to the bottom structure 121 by welding, bonding, screwing or other means.

[0172] With the end faces 2111 of the battery cell 20 arranged along the height Z of the battery assembly 100, the bottom surface 2122 of the first battery cell 201 faces the bracket 40, and the second segment 313 is connected to the bottom surface 2122 of the first battery cell 201. At this time, the side of the second segment 313 away from the corresponding bottom surface 2122 faces the bracket 40 and is connected to the bracket 40. The second segment 313 can be connected to the bracket 40 by welding, bonding, snap-fitting, etc. When the battery cell 20 is connected to the bracket 40, the second segment 313 can only contact and connect with the bracket 40. It can be understood that when the second segment 313 is fixedly connected to the bracket 40, it is not necessary to directly connect the battery cell 20 to the bracket 40. At this time, the second segment 313 can also serve as an intermediate structure 60 between the battery cell 20 and the bracket 40 to better connect the battery cell 20 to the bracket 40.

[0173] In addition to supporting the battery cell 20, the bracket 40 can also protect the battery cell 20. In the event of an external collision, the bottom structure 121 of the battery device 100 and the bracket 40 can provide multiple protections for the battery cell 20, thereby better protecting the battery cell 20 and reducing the damage that external collisions may cause to the battery cell 20.

[0174] In this embodiment, a bracket 40 is provided to support and hold the battery cell 20, thereby facilitating the installation of the battery cell 20.

[0175] refer to Figure 4 , Figure 6 , Figure 8 , Figure 9 In some embodiments, the battery cell 20 further includes a pressure relief structure 24 disposed on the end face 2111; the bracket 40 is provided with a through hole 41, which is opposite to the pressure relief structure 24 of the second battery cell 202.

[0176] Since the first section 312 and the second section 313 of the main body 31 are connected to the side surface 2121 and the bottom surface 2122 of the battery cell 20 respectively, the pressure relief structure 24 is provided on the end face 2111 to reduce the interference of the main body 31 on the pressure relief structure 24 to release flue gas.

[0177] The through hole 41 refers to the hole structure provided on the bracket 40. The through hole 41 can be a square hole, a round hole, or a hole structure of other shapes. The through hole 41 can be a straight hole, a stepped hole, a conical hole, or a hole structure of other shapes.

[0178] When the end face 2111 of the second battery cell 202 is opposite to the bottom structure 121, the pressure relief structure 24 of the second battery cell 202 faces the bracket 40. At this time, the pressure relief structure 24 of the second battery cell 202 is opposite to the through hole 41, so that the high temperature and high pressure flue gas generated by the thermal runaway of the second battery cell 202 can be discharged through the through hole 41, reducing the obstruction that the bracket 40 may cause to the discharge of the high temperature and high pressure flue gas. When there is a space between the bracket 40 and the bottom structure 121, the high temperature and high pressure flue gas generated by the thermal runaway of the second battery cell 202 can be discharged through the through hole 41 to the space between the bracket 40 and the bottom structure 121. At this time, the bracket 40 can also separate the high temperature and high pressure flue gas from the battery cell 20, so as to reduce the damage caused by the high temperature and high pressure flue gas to the battery cell 20.

[0179] The number of through holes 41 can be one, two, or more. When there is only one through hole 41, the through hole 41 can be opposite to the pressure relief structure 24 of multiple second battery cells 202; when there are multiple through holes 41, each through hole 41 can correspond one-to-one with each pressure relief structure 24 of the second battery cell 202, and one through hole 41 can also correspond to two or more pressure relief structures 24 of the second battery cells 202.

[0180] In this embodiment, a through hole 41 is provided on the bracket 40, and it is positioned opposite to the pressure relief structure 24 of the second battery cell 202. In the event of thermal runaway of the battery cell 20, this arrangement allows the high-temperature and high-pressure flue gas generated by the thermal runaway of the second battery cell 202 to flow through the through hole 41 to the space between the bracket 40 and the bottom structure 121. This reduces the negative impact of the bracket 40 on the pressure relief performance of the pressure relief structure 24, and also reduces the negative impact of the high-temperature and high-pressure flue gas generated by the thermal runaway of the second battery cell 202 on other adjacent battery cells 20.

[0181] refer to Figure 4 , Figure 6 , Figure 8 , Figure 9 In some embodiments, the battery device 100 further includes a support member 50, one end of which is connected to the end face 2111 of the second battery cell 202, and the other end of which is connected to the bracket 40, so that the end face 2111 and the bracket 40 are spaced apart.

[0182] The support member 50 refers to the structure on the bracket 40 used to support the second battery cell 202. The support member 50 can be a columnar structure, a plate-shaped structure, or other structures. The support member 50 can be a circular, square, or other shaped structure. One second battery cell 202 can correspond to one support member 50 or two support members 50. The material of the support member 50 can include plastic, metal, or other materials.

[0183] One end of the support member 50 is connected to the end face 2111 of the second battery cell 202, and the other end of the support member 50 is connected to the bracket 40. That is, the support member 50 is located between the end face 2111 of the second battery cell 202 and the bracket 40. The support member 50 can be connected to the bracket 40 by welding, bonding or other means, or the support member 50 can be integrally formed with the bracket 40. The support member 50 can be connected to the end face 2111 of the second battery cell 202 by welding, bonding or other means.

[0184] With the first battery cell 201 and the second battery cell 202 alternately arranged in sequence, a second segment 313 is connected to the bottom surface 2122 of the two first battery cells 201 on adjacent sides of the second battery cell 202. Since the second segment 313 has a certain thickness, when the second segment 313 is connected to the bracket 40, there is a gap between the end face 2111 of the second battery cell 202 and the bracket 40, meaning the second battery cell 202 is in a suspended state. Accordingly, a support member 50 is provided to support the second battery cell 202, improving the installation stability of the second battery cell 202.

[0185] For example, in the height direction of the battery device 100, the size of the support 50 can be equal to the size of the second segment 313, so that the support 50 can provide support for the second battery cell 202.

[0186] For example, in the height direction of the battery device 100, the size of the support member 50 can be larger than the size of the second segment 313. Since the second segment 313 is connected to the bottom surface 2122 of the two first battery cells 201 on both sides of the second battery cell 202, the second segment 313 on both sides of the second battery cell 202 can easily interfere with the setting of the electrical connection structure between each second battery cell 202. Therefore, the size of the support member 50 can be larger than the size of the second segment 313 so that there is space between the second segment 313 and the bracket 40, and the electrical connection structure between each second battery cell 202 can be set in this space, thereby reducing the mutual interference between the second segment 313 and the electrical connection structure.

[0187] In this embodiment, a support member 50 is provided to support the battery cell 20, thereby making the battery cell 20 and the bracket 40 spaced apart, so as to reduce the collision and friction damage that may occur between the electrode terminal 23 and the bracket 40; at the same time, the support member 50 can also provide space for the electrical connection structure (e.g., bar plate) between the electrode terminals 23.

[0188] refer to Figure 2 , Figure 4 , Figure 6 , Figure 8 , Figure 9 In some embodiments, the housing 21 includes a housing body 212 and an end cap 211. The housing body 212 has a cavity 2123 inside. The end cap 211 is connected to the housing body 212 and closes the cavity 2123. The end face 2111 is located on the side of the end cap 211 away from the cavity 2123. At least a portion of the support member 50 is disposed opposite to the side wall of the housing body 212 of the corresponding second battery cell 202.

[0189] End cap 211 refers to a component that covers the opening of the housing body 212 to isolate the internal environment of the battery cell 20 from the external environment. The housing body 212 is an assembly used to cooperate with the end cap 211 to form the internal environment of the battery cell 20. The housing body 212 has a cavity 2123 inside, and the end cap 211 can close the cavity 2123 to form the internal environment of the battery cell 20 to accommodate the electrode assembly 22.

[0190] At least a portion of the support member 50 is disposed opposite to the side wall of the housing body 212 of the corresponding second battery cell 202, that is, on the same projection plane parallel to the end face 2111, at least a portion of the orthographic projection of the support member 50 overlaps with at least a portion of the orthographic projection of the side wall of the housing body 212 of the corresponding second battery cell 202; the support member 50 may be only partially opposite to the side wall of the housing body 212, or it may be completely opposite to the side wall of the housing body 212.

[0191] Because the support member 50 is used to support the second battery cell 202, it can provide a supporting force to the second battery cell 202 in the opposite direction to its gravity. Since the end cap 211 is only partially connected to the housing body 212, and the part of the end cap 211 not connected to the housing body 212 faces the cavity 2123, this part of the end cap 211, which is usually unsupported and prone to deformation, this arrangement allows at least a portion of the supporting force provided by the support member 50 to be transferred to the housing body 212, thereby reducing the force on the end cap 211 and reducing the potential deformation of the end cap 211. In this case, the support member 50 can both provide support for the second battery cell 202 and reduce potential damage to the second battery cell 202.

[0192] In this embodiment, the support member 50 is positioned opposite the side wall of the housing body 212 so that the force provided by the support member 50 to support the battery cell 20 can be transmitted to the housing body 212. This reduces the force on the end cover 211, lowers the risk of deformation of the end cover 211, and also allows the support member 50 to better support the battery cell 20.

[0193] refer to Figures 4 to 6 , Figure 10 , Figure 11 In some embodiments, the battery cell 20 further includes an intermediate structure 60 disposed on the housing 21, the intermediate structure 60 being disposed between the bottom surface 2122 and / or the side surface 2121 and the main body 31; the intermediate structure 60 is used to connect the main body 31 to the housing 21, and / or the intermediate structure 60 is used to separate the main body 31 from the housing 21; and / or the intermediate structure 60 is used to transfer heat from the housing 21 to the main body 31.

[0194] The intermediate structure 60 refers to the structure in the battery device 100 located between the housing 21 and the main body 31. Since the main body 31 includes a first section 312 and a second section 313, an intermediate structure 60 is provided between the first section 312 and the adjacent side 2121, and an intermediate structure 60 is also provided between the second section 313 and the adjacent bottom surface 2122.

[0195] The intermediate structure 60 can be used to separate the main body 31 and the battery cell 20 to reduce the risk of short circuit of the battery cell 20 through the main body 31, and also to reduce the damage to the battery cell 20 that may be caused by heat exchange medium leakage; the intermediate structure 60 can also be used to transfer the heat of the battery cell 20 to the main body 31, so that the heat exchange component 30 can exchange heat with the battery cell 20 better and more efficiently.

[0196] The intermediate structure 60 may serve only to separate the main body 31 and the battery cell 20, or only to transfer heat, or both. Accordingly, the intermediate structure 60 may include insulating material or material with good thermal conductivity.

[0197] The intermediate structure 60 can be an independent structural component, such as a plate, or it can be a structure formed on the housing 21, such as a coating. Depending on the structure of the intermediate structure 60, it can be connected to the housing 21 by welding, bonding, or other means. When the intermediate structure 60 is connected to the housing 21, the side of the intermediate structure 60 facing the main body 31 can be connected to the main body 31 by bonding, bonding, or other means. Alternatively, the intermediate structure 60 can simply touch or press against the main body 31.

[0198] Depending on the area relationship between the main body 31 and the adjacent shell 21, the intermediate structure 60 may cover only a portion of the connected side 2121 or bottom 2122, or it may completely cover the connected side 2121 or bottom 2122.

[0199] In this embodiment, an intermediate structure 60 is provided between the main body 31 and the housing 21 to transfer heat, or to separate the main body 31 and the battery cell 20, or to fix the main body 31 to the housing 21.

[0200] refer to Figures 4 to 6 , Figure 10 , Figure 11 In some embodiments, the intermediate structure 60 includes an insulating layer 61 connected to the housing 21.

[0201] The insulating layer 61 refers to a part of the intermediate structure 60. The insulating layer 61 is used to insulate and separate the main body 31 from the adjacent housing 21 to reduce the risk of short circuit of the battery cell 20 through the main body 31. The material of the insulating layer 61 may include plastic, rubber, mica, ceramic, etc.

[0202] The intermediate structure 60 may include only the insulating layer 61, or it may include other layer structures. When the intermediate structure 60 includes multiple different layer structures, the insulating layer 61 and other layer structures are arranged along the arrangement direction of the housing 21 and the main body 31. For example, for the intermediate structure 60 located between the first segment 312 and the side surface 2121, the insulating layer 61 and other layer structures are arranged along a first direction; for example, for the intermediate structure 60 located between the second segment 313 and the bottom surface 2122, the insulating layer 61 and other layer structures are arranged along the height direction Z of the battery device 100.

[0203] In this embodiment, the intermediate structure 60 can insulate the main body 31 and the battery cell 20 to reduce the damage to the battery cell 20 that may be caused by heat exchange medium leakage, and also reduce the risk of damage to the battery cell 20 caused by short circuit between the main body 31 and the battery cell 20.

[0204] refer to Figures 4 to 6 , Figure 10 , Figure 11 In some embodiments, the intermediate structure 60 includes an adhesive layer 62, one side of which is directly connected to the main body 31, and the other side of which is directly or indirectly connected to the housing 21.

[0205] The adhesive layer 62 refers to a portion of the intermediate structure 60. The adhesive layer 62 is used to connect the main body 31 and the adjacent housing 21 to fix the main body 31 and the battery cell 20. The material of the adhesive layer 62 may include resin, rubber, silicone, etc. The side of the adhesive layer 62 facing the main body 31 is bonded to the main body 31. The side of the adhesive layer 62 facing the housing 21 can be directly bonded to the housing 21, or other structures can be provided between the adhesive layer 62 and the housing 21 so that the adhesive layer 62 is indirectly connected to the housing 21 through the structure.

[0206] Under the action of the adhesive layer 62, each battery cell 20 can be connected to the main body 31. At this time, the heat exchange assembly 30 and each battery cell 20 can form a relatively stable module, which is convenient for transportation and installation.

[0207] The intermediate structure 60 may include only the adhesive layer 62, or it may include other layer structures. When the intermediate structure 60 includes multiple different layer structures, the adhesive layer 62 and other layer structures are arranged along the arrangement direction of the housing 21 and the main body 31. For example, for the intermediate structure 60 located between the first segment 312 and the side surface 2121, the adhesive layer 62 and other layer structures are arranged along a first direction; for example, for the intermediate structure 60 located between the second segment 313 and the bottom surface 2122, the adhesive layer 62 and other layer structures are arranged along the height direction Z of the battery device 100.

[0208] For example, the intermediate structure 60 may include an adhesive layer 62 and an insulating layer 61, wherein the adhesive layer 62 is connected to the main body 31, the insulating layer 61 is connected to the adhesive layer 62, and the side of the insulating layer 61 facing away from the adhesive layer 62 is connected to the adjacent housing 21.

[0209] In this embodiment, the main body 31 is connected to the battery cell 20 through the intermediate structure 60, so that the heat exchange assembly 30 can be stably connected to each battery cell 20.

[0210] refer to Figures 4 to 6 , Figure 10 , Figure 11 In some embodiments where the intermediate structure 60 includes an adhesive layer 62, the adhesive layer 62 is a thermally conductive layer.

[0211] When the adhesive layer 62 is used to connect the main body 31 and the battery cell 20, the adhesive layer 62 can also be used to transfer heat to improve the heat exchange efficiency between the heat exchange medium in the main body 31 and the battery cell 20. In this case, the adhesive layer 62 can be a structural layer with good thermal conductivity, and the material of the adhesive layer 62 can include metal, graphite, silicon, etc.

[0212] When the intermediate structure 60 only includes the adhesive layer 62, the adhesive layer 62 can not only connect the main body 31 to the housing 21, but also transfer the heat of the battery cell 20 to the main body 31 more efficiently, so as to improve the heat exchange efficiency between the battery cell 20 and the heat exchange medium in the main body 31.

[0213] When the intermediate structure 60 includes an adhesive layer 62, an insulating layer 61, or other layered structures, the heat from the battery cell 20 can be transferred to each layered structure, and the adhesive layer 62 can transfer the heat from each layered structure to the main body 31, thereby improving the heat exchange efficiency between the battery cell 20 and the heat exchange medium in the main body 31.

[0214] In this embodiment, the heat of the shell 21 is transferred to the main body 31 through the intermediate structure 60, so that the heat exchange component 30 can better exchange heat with the battery cell 20, thereby improving the heat exchange efficiency of the heat exchange component 30.

[0215] refer to Figure 4In some embodiments, multiple battery cells 20 are also arranged along a second direction, which is at an angle to the first direction.

[0216] The second direction is set at an angle to the first direction, that is, the second direction is not parallel to the first direction; the second direction can be perpendicular to the first direction, or it can be set at other angles to the first direction; for example, when the first direction is the length direction X of the battery device 100, the second direction is the width direction Y of the battery device 100.

[0217] When the battery cells 20 are arranged along the first direction, the battery cells 20 are also arranged along the second direction. At this time, each battery cell 20 is arranged in an array along the first and second directions. Depending on the number of battery cells 20 in the first direction, there can be two, three or more columns of battery cells 20 arranged in the second direction. Each column can contain two, three or more battery cells 20. At this time, there can also be two, three or more rows of battery cells 20 arranged in the first direction.

[0218] Because a heat exchange component 30 has at least one row of battery cells 20 arranged in a first direction; based on this, the size of the main body 31 in the second direction can be equal to the size of a battery cell 20 in the second direction. In this case, a heat exchange component 30 covers only one battery cell 20 in the second direction, and the number of heat exchange components 30 is the same as the number of rows of battery cells 20; the size of the main body 31 in the second direction is larger than the size of a battery cell 20 in the second direction. For example, the size of the main body 31 in the second direction can be equal to the size of two or more battery cells 20 in the second direction. In this case, a heat exchange component 30 can cover two or more battery cells 20 in the second direction, and the number of heat exchange components 30 is less than the number of rows of battery cells 20 in the second direction.

[0219] In any column of battery cells 20 arranged along the second direction, the end faces 2111 of each battery cell 20 may face the same direction, that is, in the same column of battery cells 20 arranged along the second direction, only the first battery cell 201 or the second battery cell 202 may be provided; in the second direction, the end faces 2111 of each battery cell 20 may also face different directions, that is, in the same row in the second direction, the first battery cell 201 and the second battery cell 202 may be provided at the same time.

[0220] This embodiment provides a arrangement of some battery cells 20, so that each battery cell 20 is arranged along the first direction and the second direction, so that the housing 10 can accommodate more battery cells 20.

[0221] refer to Figure 4In some embodiments where the battery cells 20 are also arranged along a second direction, the battery device 100 includes a heat exchange assembly 30, wherein the size of the main body 31 is greater than or equal to the sum of the sizes of a row of battery cells 20 arranged along the second direction.

[0222] The main body 31 is made to have a size in the second direction that is greater than or equal to the sum of the sizes of a row of battery cells 20 arranged in the second direction, so that the main body 31 can cover each battery cell 20 in the second direction. Since the main body 31 includes a first segment 312 and a second segment 313, that is, the size of the first segment 312 and the second segment 313 in the second direction is greater than or equal to the sum of the sizes of a row of battery cells 20 arranged in the second direction, so that the main body 31 can cover each battery cell 20 in the second direction.

[0223] The main body 31 can cover each battery cell 20 in the first direction by the first segment 312 and the second segment 313 arranged alternately in the first direction. The main body 31 can also cover each battery cell 20 in the second direction. That is, one heat exchange component 30 can exchange heat with each battery cell 20, thereby reducing the number of joints 32 in the housing 10 and thus reducing the risk of heat exchange medium leakage from the joints 32.

[0224] This embodiment provides some dimensions of the main body 31 so that the main body 31 can cover each battery cell 20 along the second direction. At this time, only one heat exchange component 30 can be set in the housing 10, thereby reducing the number of joints 32 and reducing the risk of heat exchange medium leakage at the joints 32.

[0225] In some other embodiments where the battery cells 20 are also arranged along a second direction, the battery device 100 includes at least two heat exchange components 30, wherein the sum of the dimensions of each main body 31 in the second direction is greater than or equal to the sum of the dimensions of a row of battery cells 20 arranged in the second direction.

[0226] The number of heat exchange components 30 is at least two, that is, the number of heat exchange components 30 can be two, or three or more.

[0227] The sum of the dimensions of each main body 31 in the second direction is greater than or equal to the sum of the dimensions of a row of battery cells 20 arranged in the second direction, so that each main body 31 can cover each battery cell 20 in the second direction; since the main body 31 includes a first segment 312 and a second segment 313, that is, the dimensions of the first segment 312 and the second segment 313 in the second direction are both greater than or equal to the sum of the dimensions of each battery cell 20, thereby enabling the main body 31 to cover each battery cell 20 in the second direction.

[0228] Because the heat exchange effect is better upstream of the flow path of the heat exchange medium, while the heat exchange effect is usually weakened downstream of the flow path of the heat exchange medium, the battery device 100 includes multiple heat exchange components 30, which reduces the number of battery cells 20 corresponding to each heat exchange component 30 and improves the heat exchange effect downstream of the flow path of the heat exchange medium.

[0229] Meanwhile, the arrangement of multiple heat exchange components 30 makes the operation of the heat exchange components 30 more flexible, so as to adjust the state of each heat exchange component 30 for different operating conditions, and also to realize the zoned temperature control of the battery device 100.

[0230] This embodiment provides additional dimensions for the main body 31 so that the battery device 100 includes multiple heat exchange components 30 and one heat exchange component 30 is only opposite to a portion of the battery cells 20, thereby facilitating the control of different heat exchange components 30 according to different operating conditions and enabling more flexible control.

[0231] refer to Figure 12 In some embodiments where the battery cells 20 are also arranged along a second direction, in any column of battery cells 20 arranged along the second direction, the first battery cell 201 and the second battery cell 202 are arranged alternately along the second direction.

[0232] The first battery cell 201 and the second battery cell 202 are arranged alternately along the second direction, that is, in any column of battery cells 20 arranged along the second direction, the end faces 2111 of two adjacent battery cells 20 have different orientations.

[0233] Since the electrode terminal 23 is located on the end face 2111 of the battery cell 20, and the electrical connection structure of the battery device 100 is connected to the electrode terminal 23, the number of heat exchange components 30 is the same as the number of battery cells 20 in the second direction. That is, the number of heat exchange components 30 is the same as the number of rows of battery cells 20. Each heat exchange component 30 corresponds to only one battery cell 20 in the second direction, so as to reduce the mutual interference between the heat exchange components 30 and the electrical connection structure.

[0234] For example, when the first battery cell 201 and the second battery cell 202 are arranged alternately in a first direction, the first battery cell 201 and the second battery cell 202 are arranged alternately in a second direction, such that the battery cells 20 surrounding any first battery cell 201 are all second battery cells 202, and the battery cells 20 surrounding any second battery cell 202 are all first battery cells 201; when the pressure relief structure 24 is provided on the end face 2111 of the battery cell 20, in the event of thermal runaway of a battery cell 20, this arrangement can reduce the damage caused by the thermally runaway battery cell 20 to the electrode terminals 23 and electrical connection structures of adjacent battery cells 20.

[0235] This embodiment provides some battery cell 20 arrangement directions so that the periphery of each first battery cell 201 is a second battery cell 202, and the periphery of each second battery cell 202 is a first battery cell 201, thereby reducing the damage that thermal runaway of battery cell 20 may cause to adjacent battery cells 20.

[0236] In some embodiments, the electrode terminals 23 of each first battery cell 201 and the electrode terminals 23 of each second battery cell 202 are connected by different electrical connection structures.

[0237] The electrical connection structure refers to the structure in the battery device 100 used to connect and conduct the individual battery cells 20. The electrical connection structure is a structural component with good conductivity to facilitate the electrical connection of the individual battery cells 20. The electrical connection structure can be a sheet structure, a columnar structure, or a structure of other shapes. The electrical connection structure can connect the individual battery cells 20 in series, or connect them in parallel or in a mixed manner. A mixed connection means that multiple battery cells 20 are connected in both series and parallel. Multiple battery cells 20 can be connected in series, parallel, or in a mixed manner through the electrical connection structure, and then the whole composed of multiple battery cells 20 is housed in the housing 10. Alternatively, multiple battery cells 20 can be first connected in series, parallel, or in a mixed manner to form a battery module, and then multiple battery modules can be connected in series, parallel, or in a mixed manner to form a whole and housed in the housing 10.

[0238] The electrical connection structure can be connected to the electrode terminal 23 of the corresponding first battery cell 201 or second battery cell 202. The electrical connection structure can be connected to the corresponding electrode terminal 23 by welding, bonding or other means.

[0239] Because the first battery cell 201 and the second battery cell 202 are oriented differently, in order to simplify the structure and reduce the difficulty of connection, the first battery cells 201 can be connected in series, in parallel, or in a mixed manner through one or a group of electrical connection structures, and the second battery cells 202 can be connected in series, in parallel, or in a mixed manner through another or another group of electrical connection structures. Then, the two or more groups of electrical connection structures can be connected together through other electrical connection structures. A group of electrical connection structures can include two or more electrical connection structures.

[0240] This embodiment provides several connection methods for each battery cell 20. Since the electrode terminals 23 of the first battery cell 201 and the second battery cell 202 have different orientations, each first battery cell 201 and each second battery cell 202 are connected through different electrical connection structures to simplify the structure and reduce the connection difficulty.

[0241] In some embodiments, the battery device 100 includes a housing 10, a battery cell 20, and a heat exchange assembly 30.

[0242] The battery cell 20 includes a first battery cell 201 and a second battery cell 202 facing opposite directions, wherein the end face 2111 of the first battery cell 201 faces upward along the height direction Z of the battery device 100, and the end face 2111 of the second battery cell 202 faces downward along the height direction Z of the battery device 100.

[0243] Each battery cell 20 is arranged in an array along the length direction X and the width direction Y of the battery device 100; in the length direction X of the battery device 100, the first battery cell 201 and the second battery cell 202 are arranged alternately in sequence; in the width direction Y of the battery device 100, the end faces 2111 of each battery cell 20 in the same column face the same direction.

[0244] The battery cell 20 includes two oppositely arranged first side surfaces 2121a and two oppositely arranged second side surfaces 2121b, with the two first side surfaces 2121a arranged along the length direction X of the battery device 100.

[0245] The heat exchange assembly 30 includes a main body 31, which has a flow channel 311 for the flow of heat exchange medium. The main body 31 includes a first segment 312 and a second segment 313 that are alternately connected along the length X of the battery device 100. The first segment 312 is connected to the first side surface 2121a of the battery cell 20, and the second segment 313 is connected to the bottom surface 2122 of the battery cell 20. In the length X of the battery device 100, the first segment 312 is provided between adjacent first battery cells 201 and second battery cells 202. In the width Y of the battery device 100, the size of the main body 31 is greater than or equal to the sum of the sizes of the battery cells 20 in the same row.

[0246] The heat exchange assembly 30 also includes two connectors 32, which are respectively connected to both ends of the main body 31 and communicate with the flow channel 311, so that the flow channel 311 can be connected to external equipment through the connectors 32.

[0247] The housing 10 is also provided with a bracket 40, which is connected to the bottom plate of the housing 10; each battery cell 20 is installed on the bracket 40, wherein the end face 2111 of each second battery cell 202 faces the bracket 40.

[0248] The bracket 40 is provided with multiple through holes 41, each through hole 41 being opposite to the pressure relief structure 24 of a second battery cell 202; the bracket 40 is provided with a support member 50, which abuts against the end cap 211 of the second battery cell 202.

[0249] Secondly, embodiments of this application also provide an energy storage device, including the battery device 100 provided in some embodiments of the first aspect.

[0250] An energy storage device includes one or more battery clusters to increase its voltage and capacity. A battery cluster may include multiple individual battery cells 20, which are connected in series via a busbar to increase the voltage of the energy storage device. When the energy storage device includes multiple battery clusters, the clusters are connected in parallel to increase the capacity of the energy storage device.

[0251] Energy storage devices can be used in energy storage power stations, wind power generation systems, solar power generation systems, mobile power systems, or temporary power supply systems. Energy storage devices can store electrical energy as needed and output it when appropriate. For example, an energy storage device 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 energy storage devices.

[0252] In some embodiments, the energy storage device is an energy storage container or an energy storage cabinet.

[0253] In some embodiments, the energy storage device may include a cabinet and one or more battery clusters housed within the cabinet.

[0254] In some embodiments, the energy storage device 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.

[0255] As an example, the thermal management module may include a liquid cooling unit that supplies coolant to each battery device 100 via piping to regulate the temperature of the individual battery cells 20.

[0256] 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 (SBMU) and a fusion switch.

[0257] As an example, the central control module can serve as the battery management unit for an energy storage device, used to monitor and manage the device. The central control module can monitor information such as the energy storage device's current, voltage, power, state of charge, or temperature. For instance, it can control the charging and discharging current and voltage of the energy storage device. As an example, the central control module includes modules such as an Insulation Monitoring Module (IMM), a Master Battery Management Unit (MBMU), an Ethernet (ETH) module, and a fiber optic conversion module.

[0258] As an example, the fire protection module includes a control panel, detectors, alarm devices, etc., used to detect, alarm, or extinguish fires in the energy storage system.

[0259] As an example, a power distribution module can be used to distribute power to modules in an energy storage device that require electricity.

[0260] Thirdly, some examples of this application also provide an electrical device, namely, a battery device 100 provided in some embodiments of the first aspect; or an energy storage device provided in some embodiments of the second aspect. The battery device 100 is used to store or provide electrical energy.

[0261] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, characterized in that, include: Box; A battery cell is housed within the housing. The battery cell includes a housing and electrode terminals disposed on the housing. The housing includes an end face and a bottom face disposed opposite to each other. The housing also includes a side face disposed around the periphery of the housing. The two ends of the side face are respectively connected to the end face and the bottom face. The electrode terminals are disposed on the end face. There are multiple battery cells, and the multiple battery cells are arranged at least along a first direction. The multiple battery cells include a first battery cell and a second battery cell, and the end faces of the first battery cell and the end faces of the second battery cell are oriented in opposite directions. A heat exchange assembly includes a main body, wherein the main body is provided with a flow channel for the heat exchange medium to circulate; The main body includes a first segment and a second segment that are alternately connected in sequence along a first direction. The first segment is connected to the side surface and is located between the first battery cell and the adjacent second battery cell. The second segment is connected to the bottom surface.

2. The battery device according to claim 1, characterized in that, The heat exchange assembly also includes a connector located at at least one end of the main body.

3. The battery device according to claim 2, characterized in that, There are two connectors, and the two connectors are respectively located on opposite sides of the main body.

4. The battery device according to claim 1, characterized in that, The main body is provided with a partition plate, the length direction of which is the same as the extension direction of the flow channel, and the partition plate divides the flow channel into multiple sub-flow channels.

5. The battery device according to claim 1, characterized in that, The side includes two oppositely arranged first side and two oppositely arranged second side, and the first side and the second side are connected end to end in alternating order, and the area of ​​the first side is larger than the area of ​​the second side. The two first sides are arranged along the first direction, and the first segment is connected to the first side.

6. The battery device according to any one of claims 1-5, characterized in that, The first battery cell and the second battery cell are arranged alternately along the first direction, and the first segment is connected to two opposite sides of each battery cell.

7. The battery device according to any one of claims 1-5, characterized in that, The housing includes a top structure and a bottom structure, and the battery cell is disposed between the top structure and the bottom structure; The end face of the first battery cell faces the top structure, and the end face of the second battery cell faces the bottom structure.

8. The battery device according to claim 7, characterized in that, The battery device also includes a bracket disposed on the bottom structure, and the individual battery cells are disposed on the bracket.

9. The battery device according to claim 8, characterized in that, The battery cell also includes a pressure relief structure disposed on the end face; The bracket is provided with a through hole, which is opposite to the pressure relief structure of the second battery cell.

10. The battery device according to claim 8, characterized in that, The battery device further includes a support member, one end of which is connected to the end face of the second battery cell, and the other end of which is connected to the bracket, so that the end face and the bracket are spaced apart.

11. The battery device according to claim 10, characterized in that, The housing includes a housing body and an end cap, and the housing body has a cavity inside; The end cap is connected to the housing body and closes the cavity, and the end face is located on the side of the end cap away from the cavity; At least a portion of the support member is disposed opposite to the side wall of the housing body of the corresponding second battery cell.

12. The battery device according to any one of claims 1-5, characterized in that, The battery cell also includes an intermediate structure disposed on the housing, the intermediate structure being disposed between the bottom surface and / or the side surface and the main body; The intermediate structure is used to connect the main body to the housing, and / or the intermediate structure is used to separate the main body from the housing, and / or the intermediate structure is used to transfer heat from the housing to the main body.

13. The battery device according to claim 12, characterized in that, The intermediate structure includes an insulating layer connected to the housing.

14. The battery device according to claim 12, characterized in that, The intermediate structure includes an adhesive layer, one side of which is directly connected to the main body, and the other side of which is directly or indirectly connected to the housing.

15. The battery device according to claim 14, characterized in that, The adhesive layer is a thermally conductive layer.

16. The battery device according to any one of claims 1-5, characterized in that, The multiple battery cells are also arranged along a second direction, which is at an angle to the first direction.

17. The battery device according to claim 16, characterized in that, The battery device includes one of the heat exchange components, wherein, in the second direction, the size of the main body is greater than or equal to the sum of the sizes of a row of battery cells arranged in the second direction.

18. The battery device according to claim 16, characterized in that, The battery device includes at least two of the heat exchange components, and in the second direction, the sum of the dimensions of each of the main bodies is greater than or equal to the sum of the dimensions of a row of battery cells arranged in the second direction.

19. The battery device according to claim 16, characterized in that, In any column of battery cells arranged along the second direction, the first battery cell and the second battery cell are alternately arranged along the second direction.

20. The battery device according to any one of claims 1-5, characterized in that, The electrode terminals of each of the first battery cells and the electrode terminals of each of the second battery cells are connected by different electrical connection structures.

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

22. An electrical appliance, characterized in that, Includes a battery device as described in any one of claims 1-20 or an energy storage device as described in claim 21, wherein the battery device is used to store or provide electrical energy.

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