Battery device, electric equipment and energy storage equipment

Abstract

The utility model relates to the technical field of batteries, and provides a battery device, electric equipment and energy storage equipment, the battery device comprises a box body, a battery monomer and a heat exchange plate, the battery monomer and the heat exchange plate are arranged in the box body, and the heat exchange plate can exchange heat with the side surface of the battery monomer. Wherein a flow channel is arranged in a bottom plate of the box body and can exchange heat with the bottom surface of the single battery; a communicating opening is formed in the bottom of the heat exchange plate and can communicate with the flow channel in the bottom plate, so that a heat exchange medium can flow through the heat exchange plate through the flow channel in the bottom plate. By the adoption of the structural design, pipelines on the two sides of the heat exchange plate in the length direction can be omitted, the problem caused by arrangement of the pipelines in the box body is solved, the occupied space of the pipelines in the box body can be reduced, and the energy density of the battery device is improved.

Description

Technical Field

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

[0002] New energy batteries are being used more and more widely in daily life and industry. For example, new energy vehicles equipped with batteries are already widely used. In addition, batteries are being used more and more in the field of energy storage.

[0003] In related technologies, several battery cells and heat exchange plates for exchanging heat between the battery cells are placed inside a housing to form a battery device. How to efficiently utilize the internal space of the battery housing and improve the energy density of the battery device is an urgent problem to be solved.

[0004] The above statements are for the purpose of providing background information in relation to this application only and do not necessarily constitute prior art. Utility Model Content

[0005] In view of the above problems, embodiments of this application provide a battery device, an electrical device, and an energy storage device, which are beneficial to improving the energy density of the battery device.

[0006] In a first aspect, embodiments of this application provide a battery device, including an inlet pipe, an outlet pipe, a housing with a mounting cavity, and a battery cell and a heat exchange plate housed within the mounting cavity.

[0007] The housing includes a base plate, and the interior of the base plate has a first flow channel and a second flow channel for the flow of heat exchange medium. The first flow channel is connected to the liquid inlet pipe, and the second flow channel is connected to the liquid outlet pipe. The base plate is in contact with the bottom surface of the battery cell and can exchange heat with the bottom surface of the battery cell.

[0008] The bottom plate has a first opening and a second opening on the side facing the battery cell. The first opening is connected to the first flow channel, and the second opening is connected to the second flow channel.

[0009] The heat exchange plate has a third and a fourth flow channel inside, which are connected to each other for the flow of heat exchange medium. The heat exchange plate is in contact with the side of the battery cell and can exchange heat with the side of the battery cell.

[0010] The heat exchange plate is connected to the base plate, and the side of the heat exchange plate facing the base plate is provided with a first communication port and a second communication port;

[0011] The first connecting port is sealed and connected to the first opening to connect the first flow channel and the third flow channel; and the second connecting port is sealed and connected to the second opening to connect the second flow channel and the fourth flow channel.

[0012] In the above technical solution, flow channels are formed within the bottom plate of the housing. These channels can communicate with the flow channels within the heat exchange plate, forming a circulation path for the heat exchange medium. The flow channels within the bottom plate can exchange heat on the bottom surface of the battery cells, while the flow channels within the heat exchange plate can exchange heat on the sides of the battery cells. By exchanging heat on multiple surfaces of the battery cells, the heat dissipation efficiency of the battery device can be improved. Furthermore, the heat exchange plate has connecting ports at its bottom for the inflow and outflow of the heat exchange medium, eliminating the need for pipes on both sides of the heat exchange plate along its length. This reduces the space occupied by pipes within the housing, allowing for more efficient and rational use of the internal space of the housing, thereby increasing the energy density of the battery device.

[0013] In some embodiments, the first flow channel is provided with an inlet and an outlet at both ends in its extending direction, and the inlet of the first flow channel is connected to the liquid inlet pipe;

[0014] The second flow channel has an inlet and an outlet at both ends of its extension direction. The inlet of the second flow channel is connected to the outlet of the first flow channel, and the outlet of the second flow channel is connected to the liquid outlet pipe.

[0015] In the above technical solution, the first and second flow channels in the base plate, together with the inlet and outlet pipes, can form a circulation path for the heat exchange medium, which can improve the heat exchange capacity of the first and second flow channels in the base plate, thereby improving the heat dissipation efficiency of the bottom surface of the battery cell.

[0016] In some embodiments, a first baffle is provided inside the base plate to isolate the first flow channel from the second flow channel.

[0017] In the above technical solution, by setting a first partition, the first flow channel and the second flow channel are not directly connected inside the bottom plate, so as to restrict the heat exchange medium in the first flow channel to flow into the second flow channel through the flow channel in the heat exchange plate and form a circulation path of the heat exchange medium, so that the flow channel in the heat exchange plate can flow through sufficient heat exchange medium, thereby improving the heat dissipation efficiency of the side of the battery cell.

[0018] In some embodiments, the base plate is provided with a second partition to divide the first flow channel and / or the second flow channel into a plurality of first sub-flow channels.

[0019] In the above technical solution, by setting a second baffle, on the one hand, the heat exchange medium can be guided to be distributed more evenly in the first flow channel and / or the second flow channel, so as to improve the heat exchange uniformity of the battery cell; on the other hand, the structural strength of the first flow channel and / or the second flow channel can be strengthened, thereby enhancing the overall structural strength of the base plate and the box.

[0020] In some embodiments, at least some of the first sub-channels are connected end-to-end.

[0021] In the above technical solution, by setting at least some of the first sub-channels to be connected end to end, some or all of the first sub-channels can be connected in sequence, thereby guiding the heat exchange medium to flow through most or all of the areas of the first channel and / or the second channel, so as to improve the heat dissipation efficiency of the bottom surface of the battery cell.

[0022] In some embodiments, the first flow channel is divided by the second baffle into a plurality of first sub-flow channels arranged side by side, and the ends of the plurality of first sub-flow channels within the first flow channel near the inlet pipe are all connected to the inlet pipe; and / or

[0023] The second flow channel is divided into multiple first sub-flow channels arranged side by side by the second partition. The ends of the multiple first sub-flow channels in the second flow channel that are close to the liquid outlet pipe are all connected to the liquid outlet pipe.

[0024] In the above technical solution, by setting multiple first sub-channels in the first flow channel and / or the second flow channel to be arranged side by side and all of them connected to the inlet pipe or outlet pipe, the flow channel design in the base plate can be simplified and the processing can be facilitated. Moreover, the multiple first sub-channels arranged side by side can restrict multiple second baffles from being arranged side by side inside the base plate, which helps to improve the overall structural strength of the base plate.

[0025] In some embodiments, the third flow channel is provided with an inlet and an outlet at both ends in its extending direction, and the inlet of the third flow channel is connected to the first communication port.

[0026] The fourth flow channel has an inlet and an outlet at both ends in its extension direction. The inlet of the fourth flow channel is connected to the outlet of the third flow channel, and the outlet of the fourth flow channel is connected to the second connecting port.

[0027] In the above technical solution, by setting the connection between the third flow channel and the fourth flow channel at a position far away from the first and second connection ports, the heat exchange medium can flow through most or all of the area inside the heat exchange plate, thereby improving the heat dissipation efficiency of the side of the battery cell.

[0028] In some embodiments, the heat exchange plate is provided with a third baffle to divide the third flow channel and / or the fourth flow channel into a plurality of second sub-flow channels.

[0029] In the above technical solution, by setting a third baffle, on the one hand, the heat exchange medium can be guided to be distributed more evenly in the third flow channel and / or the fourth flow channel, so as to improve the heat exchange uniformity of the battery cell; on the other hand, the structural strength of the third flow channel and / or the fourth flow channel can be strengthened, thereby enhancing the overall structural strength of the heat exchange plate.

[0030] In some embodiments, at least some of the second sub-channels are connected end-to-end.

[0031] In the above technical solution, by setting at least some of the second sub-channels to be connected end to end, some or all of the second sub-channels can be connected in sequence, thereby guiding the heat exchange medium to flow through most or all of the areas of the third and / or fourth channels, so as to improve the heat dissipation efficiency of the side of the battery cell.

[0032] In some embodiments, the third flow channel is divided by a third partition into a plurality of second sub-flow channels arranged side by side. The ends of the plurality of second sub-flow channels within the third flow channel closest to the first connecting port are all connected to the first connecting port, and the ends of the plurality of second sub-flow channels within the third flow channel furthest from the first connecting port are all connected to the fourth flow channel; and / or,

[0033] The fourth flow channel is divided into multiple second sub-flow channels arranged side by side by the third partition. The ends of the multiple second sub-flow channels in the fourth flow channel that are closer to the second connecting port are all connected to the second connecting port, and the ends of the multiple second sub-flow channels in the fourth flow channel that are farther away from the second connecting port are all connected to the third flow channel.

[0034] In the above technical solution, by setting multiple second sub-channels in the third and / or fourth flow channels to be arranged side by side and all of them connected to the first or second connecting port, the flow channel design in the heat exchange plate can be simplified and the processing can be facilitated. Moreover, the multiple second sub-channels arranged side by side can restrict multiple third baffles from being arranged side by side inside the heat exchange plate, which helps to improve the overall structural strength of the heat exchange plate.

[0035] In some embodiments, the first flow channel and the second flow channel are arranged alternately along the length of the heat exchange plate; and / or,

[0036] The third and fourth flow channels are arranged alternately along the length of the heat exchange plate.

[0037] In the above technical solution, by arranging the first and second flow channels alternately, the first flow channel can be positioned in the middle area of ​​the bottom surface of each battery cell, and the second flow channel can be positioned on the side area of ​​the bottom surface of each battery cell, thereby improving the heat transfer uniformity of the bottom surface of each battery cell within the housing. Similarly, by arranging the third and fourth flow channels alternately, the third flow channel can be positioned in the middle area of ​​the side surface of each battery cell, and the fourth flow channel can be positioned on the side surface of each battery cell, thereby improving the heat transfer uniformity of the side surface of each battery cell within the housing.

[0038] In some embodiments, the second flow channel is disposed at at least one end of the base plate along the length of the heat exchange plate; and / or,

[0039] The fourth flow channel is disposed at at least one end of the heat exchange plate along its length.

[0040] In the above technical solution, by setting the second and fourth flow channels on the side of the battery device, the first and third flow channels with relatively low temperatures can exchange heat with the high-temperature area in the middle of the battery device, so that the base plate and heat exchange plate can more reasonably exchange heat for the battery cells in different areas of the battery device, thereby improving the overall heat exchange uniformity of the battery device.

[0041] In some embodiments, the first connection port and the first opening, as well as the second connection port and the second opening, are sealed together by an adapter.

[0042] Furthermore, the adapter includes a pipe body;

[0043] The pipe body is divided into an upper pipe section and a lower pipe section. The upper pipe section is configured to be inserted into the first connecting port and the second connecting port respectively, and the lower pipe section is configured to be inserted into the first opening and the second opening respectively.

[0044] The tube has a connecting hole for connecting the first connecting port and the first opening, and for connecting the second connecting port and the second opening.

[0045] Furthermore, the adapter also includes a flange surrounding the outer periphery of the tube;

[0046] The flange has a first abutting surface and a second abutting surface, the first abutting surface being configured to abut against the surface of the heat exchange plate facing the bottom plate, and the second abutting surface being configured to abut against the surface of the bottom plate facing the heat exchange plate.

[0047] In the above technical solution, by setting an adapter between the base plate and the heat exchange plate for docking, the heat exchange plate can be positioned and assembled onto the base plate, and the sealing between the opening of the base plate and the communication port of the heat exchange plate can be improved.

[0048] In some embodiments, the adapter is a rubber component.

[0049] In the above technical solution, by designing the adapter as a rubber component, the sealing performance between the opening of the base plate and the connection port of the heat exchange plate can be further improved.

[0050] In some embodiments, a first positioning tube is provided on the side of the base plate facing the mounting cavity. The first positioning tube is connected to the outer periphery of the first opening and the second opening, and the first positioning tube is configured to be inserted into the first communication port and the second communication port respectively; or...

[0051] A second positioning tube is provided on the side of the heat exchange plate facing the bottom plate. The second positioning tube is connected to the outer periphery of the first connecting port and the second connecting port. The second positioning tube is configured to be able to be inserted into the first opening and the second opening respectively.

[0052] In the above technical solution, by setting a first positioning tube on the base plate or a second positioning tube on the heat exchange plate, the base plate and the heat exchange plate can be positioned and assembled, thereby reducing assembly difficulty and improving assembly efficiency.

[0053] In some embodiments, the housing further includes a side wall, which, together with the bottom plate, defines a mounting cavity;

[0054] The ends of the heat exchange plate along its length are connected to the sidewall.

[0055] In the above technical solution, the overall structural strength of the battery device can be improved by connecting the end of the heat exchange plate to the side wall of the housing.

[0056] Secondly, embodiments of this application also provide an electrical device, including a battery device provided in any of the embodiments of the first aspect, the battery device being used to provide electrical energy.

[0057] Thirdly, embodiments of this application also provide an energy storage device, including a battery device provided in any of the embodiments of the first aspect, the battery device being used to store electrical energy. Attached Figure Description

[0058] 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.

[0059] Figure 1 This is a schematic diagram of the structure of a vehicle provided according to some embodiments of this application;

[0060] Figure 2 This is an exploded structural diagram of a battery device provided according to some embodiments of this application;

[0061] Figure 3 This is a schematic diagram of the internal structure of a battery device provided according to some embodiments of this application;

[0062] Figure 4 This is a three-dimensional structural schematic diagram of a battery cell according to some embodiments of this application;

[0063] Figure 5 This is a three-dimensional structural diagram of a box provided according to some embodiments of this application;

[0064] Figure 6 This is a schematic diagram of the internal structure of a base plate provided according to some embodiments of this application;

[0065] Figure 7This is a three-dimensional structural schematic diagram of a heat exchange plate provided according to some embodiments of this application;

[0066] Figure 8 This is a schematic diagram of the internal structure of a heat exchange plate according to some embodiments of this application;

[0067] Figure 9 This is a schematic diagram illustrating the assembly relationship between the heat exchange plate and the base plate according to some embodiments of this application;

[0068] Figure 10 This is a schematic diagram of the layout of a first type of flow channel within a base plate according to some embodiments of this application;

[0069] Figure 11 This is a schematic diagram of a second type of flow channel layout within a base plate according to some embodiments of this application;

[0070] Figure 12 This is a schematic diagram of a third flow channel layout within a base plate according to some embodiments of this application;

[0071] Figure 13 This is a schematic diagram of a fourth type of flow channel layout in the base plate according to some embodiments of this application;

[0072] Figure 14 This is a schematic diagram of the layout of a fifth flow channel within a base plate according to some embodiments of this application;

[0073] Figure 15 This is a schematic diagram of the layout of a sixth flow channel in a base plate according to some embodiments of this application;

[0074] Figure 16 This is a schematic diagram of the layout of a seventh flow channel within a base plate according to some embodiments of this application;

[0075] Figure 17 This is a schematic diagram of the layout of an eighth flow channel within a base plate according to some embodiments of this application;

[0076] Figure 18 This is a schematic diagram of the layout of a ninth flow channel in a base plate according to some embodiments of this application;

[0077] Figure 19 This is a schematic diagram of the layout of a tenth flow channel within a base plate according to some embodiments of this application;

[0078] Figure 20 This is a schematic diagram of a first type of flow channel layout within a heat exchange plate according to some embodiments of this application;

[0079] Figure 21This is a schematic diagram of a second flow channel layout within a heat exchange plate according to some embodiments of this application;

[0080] Figure 22 This is a schematic diagram of a third flow channel layout within a heat exchange plate according to some embodiments of this application;

[0081] Figure 23 This is a schematic diagram of a fourth flow channel layout within a heat exchange plate according to some embodiments of this application;

[0082] Figure 24 This is a schematic diagram of a fifth flow channel layout within a heat exchange plate according to some embodiments of this application;

[0083] Figure 25 This is a schematic diagram of a sixth flow channel layout within a heat exchange plate according to some embodiments of this application;

[0084] Figure 26 This is a schematic diagram of the layout of an eleventh flow channel within a base plate according to some embodiments of this application;

[0085] Figure 27 This is a schematic diagram of the layout of a seventh flow channel within a heat exchange plate according to some embodiments of this application;

[0086] Figure 28 This is a schematic diagram of the layout of the twelfth flow channel in the base plate according to some embodiments of this application;

[0087] Figure 29 This is a schematic diagram of the layout of an eighth flow channel within a heat exchange plate according to some embodiments of this application;

[0088] Figure 30 This is a three-dimensional structural diagram of an adapter provided according to some embodiments of this application at one angle;

[0089] Figure 31 This is a three-dimensional structural diagram of an adapter provided according to some embodiments of this application from another angle;

[0090] Figure 32 This is a schematic diagram showing the assembly relationship between the adapter, heat exchange plate, and base plate according to some embodiments of this application;

[0091] Figure 33 This is a schematic diagram showing the assembly relationship between the first positioning tube, the heat exchange plate, and the base plate according to some embodiments of this application;

[0092] Figure 34 This is a schematic diagram showing the assembly relationship between the second positioning tube, the heat exchange plate, and the base plate according to some embodiments of this application.

[0093] The attached figures are labeled as follows:

[0094] 1000 - Vehicles;

[0095] 100 - Battery device, 110 - Battery cell assembly, 120 - Housing, 1201 - First housing, 1202 - Second housing;

[0096] 200-Controller;

[0097] 300-motor;

[0098] 10 - Battery cell, 101 - Top surface, 102 - Bottom surface, 103 - Large side surface, 104 - Small side surface, 105 - Terminal post;

[0099] 20-Base plate, 201-First flow channel, 2011-Inlet of the first flow channel, 2012-Outlet of the first flow channel, 202-Second flow channel, 2021-Inlet of the second flow channel, 2022-Outlet of the second flow channel, 203-First opening, 204-Second opening, 205-First baffle, 206-Second baffle, 207-First sub-flow channel;

[0100] 30-Heat exchange plate, 301-Third flow channel, 3011-Inlet of the third flow channel, 3012-Outlet of the third flow channel, 302-Fourth flow channel, 3021-Inlet of the fourth flow channel, 3022-Outlet of the fourth flow channel, 303-First connecting port, 304-Second connecting port, 305-Third baffle, 306-Second sub-flow channel;

[0101] 40 - Inlet pipe;

[0102] 50 - Discharge tube;

[0103] 60-Adapter, 601-Flange, 6011-First abutting surface, 6012-Second abutting surface, 602-Upper pipe section, 603-Lower pipe section, 604-Connecting hole;

[0104] 70 - First positioning tube;

[0105] 80 - Second positioning tube;

[0106] 90-Sidewall. Detailed Implementation

[0107] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0108] Unless otherwise defined, all technical and scientific terms used in the embodiments of this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used in the embodiments of this application is for the purpose of describing specific embodiments only and is not intended to limit this application; the terms "comprising" and "having" and any variations thereof in the specification and the foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0109] The term "embodiment" as used in this application means that a specific 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 in 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 in this application can be combined with other embodiments.

[0110] The specific term "exemplary" used in the embodiments of this application means "serving as an example, embodiment, or illustration." Any embodiment illustrated as "exemplary" is not necessarily to be construed as superior to or better than other embodiments. Although various aspects of the embodiments are shown in the accompanying drawings, the drawings are not necessarily drawn to scale unless specifically indicated otherwise.

[0111] In the description of the embodiments of this application, the technical terms "first", "second", "third", etc. are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features.

[0112] In the description of the embodiments in this application, the technical 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, or B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects are in an "or" relationship.

[0113] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the technical terms "installation," "connection," "joining," "fixing," etc., should be interpreted broadly. For example, it can refer to a fixed connection, a detachable connection, or an integral part; it can refer to a mechanical connection or an electrical connection; it can refer to a direct connection or an indirect connection through an intermediate medium; it 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 this application can be understood according to the specific circumstances.

[0114] In the description of the embodiments of this application, the technical terms "upper", "lower", "inner", "outer", "front", "rear", "left", "right", "top", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship in the working state of the embodiments of this application. They are only used to facilitate the description of the embodiments of this application and to simplify 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 this application.

[0115] In the description of the embodiments of this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0116] In the description of the embodiments of this application, "parallel" includes not only the case of absolute parallelism, but also the case of approximate parallelism as commonly understood in engineering; at the same time, "perpendicular" also includes not only the case of absolute perpendicularity, but also the case of approximate perpendicularity as commonly understood in engineering.

[0117] In the description of the embodiments of this application, "multiple" means two or more (including two), unless otherwise explicitly specified.

[0118] In the description of the embodiments of this application, the same reference numerals denote the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, and other dimensions of various components in the embodiments of this application shown in the drawings, as well as the overall thickness, length, and other dimensions of the integrated device, are merely illustrative and should not constitute any limitation on this application.

[0119] Currently, judging from market trends, battery applications are becoming increasingly widespread. Batteries are not only used in energy storage systems such as hydropower, thermal power, wind power, and solar power plants, but also extensively in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in aerospace and other fields. With the continuous expansion of battery applications, market demand is also constantly increasing.

[0120] To ensure sufficient power output, multiple battery cells are typically stacked within the battery pack. However, the continuous charging and discharging of individual cells generates significant heat, causing the internal temperature of the battery pack to rise. This stacking structure exacerbates the problem, severely impacting the battery pack's performance and lifespan, and potentially posing significant safety hazards for consumers. Therefore, related technologies often incorporate heat exchange plates inside the battery pack to cool the individual cells. In conventional designs, these heat exchange plates have pipes along their length to facilitate the circulation of the heat exchange medium. Low-temperature heat exchange medium is introduced into the channels within the heat exchange plate, and the cooled medium is then discharged. The pipes between adjacent heat exchange plates are usually connected by sleeves, allowing multiple heat exchange plates to be connected in series or parallel for efficient management of the heat exchange medium flow. However, due to errors in the pipe structure and assembly tolerances, the pipes between two adjacent heat exchange plates may not be on the same horizontal line, making it difficult to assemble the sleeve or causing assembly failure, which can easily lead to leakage and affect the electrical safety of the battery device. Moreover, the pipes on both sides of the heat exchange plate will occupy more space inside the battery device, reducing the energy density of the battery device.

[0121] To address the aforementioned issues, embodiments of this application provide a battery device comprising a housing, battery cells disposed within the housing, and a heat exchange plate. The heat exchange plate exchanges heat with the sides of the battery cells. The bottom plate of the housing has internal flow channels that exchange heat with the bottom surface of the battery cells. The bottom of the heat exchange plate has a connecting opening that communicates with the flow channels within the bottom plate, allowing the heat exchange medium to flow through the flow channels in the bottom plate. This structural design eliminates the need for pipes on both sides of the heat exchange plate along its length, solving the problems associated with arranging pipes within the housing and reducing the space occupied by pipes within the housing, thereby improving the energy density of the battery device.

[0122] The technical solutions provided in this application are applicable to electrical equipment that uses battery devices as a power source and energy storage devices that use battery devices as energy storage elements. Electrical equipment can be vehicles, ships, spacecraft, etc. Energy storage devices can be energy storage containers, energy storage cabinets, etc.

[0123] For ease of description, this application uses the application of a battery device in a vehicle as an example for illustration.

[0124] refer to Figure 1 , Figure 1This is a schematic diagram of the structure of a vehicle according to some embodiments of this application. The vehicle 1000 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid electric vehicle, or a range-extended electric vehicle, etc. A battery device 100 is disposed inside the vehicle 1000, and the battery device 100 can be located at the bottom, front, or rear of the vehicle 1000. The battery device 100 can be used to power the vehicle 1000; for example, the battery device 100 can serve as the operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300. The controller 200 is used to control the battery device 100 to supply power to the motor 300, for example, to meet the power needs of the vehicle 1000 during starting, navigation, and driving.

[0125] In some embodiments, the battery device 100 can not only serve as the operating power source for the vehicle 1000, but also as the driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle.

[0126] refer to Figure 2 , Figure 2 This is an exploded structural diagram of a battery device according to some embodiments of this application. The battery device includes a housing 120 and a battery cell assembly 110. The housing 120 has a receiving cavity, and the battery cell assembly 110 is received within the receiving cavity of the housing 120.

[0127] In some embodiments, a battery apparatus may include one or more battery cell assemblies for providing voltage and capacity. A battery cell assembly may include multiple battery cells connected in series, parallel, or in a mixed configuration via a busbar.

[0128] In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells.

[0129] As an example, a battery cell assembly can be a battery module, which consists of multiple battery cells arranged and fixed together to form an independent module.

[0130] As an example, a battery module can be formed by bundling multiple battery cells together with cable ties.

[0131] In some embodiments, the battery device may be a battery pack, which includes a housing and one or more individual battery cells housed within the housing.

[0132] As an example, the battery cell assembly can be a battery module, which can be housed in a housing by fixing the battery module in the housing.

[0133] As an example, battery cell assemblies can also be housed in a housing by directly fixing multiple battery cells to the housing.

[0134] As an example, such as Figure 2 As shown, the housing 120 may include a first housing 1201 and a second housing 1202. The first housing 1201 and the second housing 1202 are fastened together to form a closed space inside the housing 120 to house the battery cell assembly 110. Here, "closed" refers to covering or closing, which can be sealed or unsealed. The first housing 1201 may be a top cover or a bottom plate.

[0135] As an example, the enclosure may include a top cover, a frame, and a bottom plate. The frame may be formed by multiple side walls, and the top cover and bottom plate are connected to the frame respectively, so that the interior of the enclosure forms a closed space to house the individual battery cells.

[0136] In some embodiments, the housing may be part of the vehicle's chassis structure. For example, a portion of the housing may be at least a part of the vehicle's floor, or a portion of the housing may be at least a part of the vehicle's crossbeams and longitudinal beams.

[0137] In some embodiments, the battery cell can be a secondary battery, which refers to a battery cell that can be recharged to activate the active materials and continue to be used after the battery cell has been discharged.

[0138] As an example, the battery cell can be a lithium-ion battery, sodium-ion battery, sodium-lithium-ion battery, lithium metal battery, sodium metal battery, lithium-sulfur battery, magnesium-ion battery, nickel-metal hydride battery, nickel-cadmium battery, lead-acid battery, etc., and the embodiments of this application are not limited in this regard.

[0139] As an example, the battery cell can be a prismatic battery cell or a battery cell with other shapes having a bottom surface and sides. Prismatic battery cells include prismatic battery cells, blade-shaped battery cells, and multi-prismatic batteries, such as hexagonal prismatic batteries. The embodiments of this application are not limited in this respect.

[0140] The technical solutions of the embodiments of this application are described in detail below with reference to the accompanying drawings. The technical features involved in the different embodiments of this application described below can be combined with each other as long as they do not conflict with each other.

[0141] refer to Figures 3 to 9 , Figure 3 This is a schematic diagram of the internal structure of a battery device provided according to some embodiments of this application; Figure 4 This is a three-dimensional structural schematic diagram of a battery cell according to some embodiments of this application; Figure 5 This is a three-dimensional structural diagram of a box provided according to some embodiments of this application; Figure 6 This is a schematic diagram of the internal structure of a base plate provided according to some embodiments of this application; Figure 7 This is a three-dimensional structural schematic diagram of a heat exchange plate provided according to some embodiments of this application; Figure 8 This is a schematic diagram of the internal structure of a heat exchange plate according to some embodiments of this application; Figure 9 This is a schematic diagram of the assembly relationship between the heat exchange plate and the base plate according to some embodiments of this application.

[0142] Firstly, such as Figures 3 to 9 As shown, an embodiment of this application provides a battery device, which includes an inlet pipe 40, an outlet pipe 50, a housing 120 with a mounting cavity, and a battery cell 10 and a heat exchange plate 30 housed within the mounting cavity. The housing 120 includes a bottom plate 20, the interior of which is formed a first flow channel 201 and a second flow channel 202 for the flow of a heat exchange medium. The first flow channel 201 communicates with the inlet pipe 40, and the second flow channel 202 communicates with the outlet pipe 50. The bottom plate 20 contacts the bottom surface 102 of the battery cell 10 and is capable of exchanging heat with the bottom surface 102 of the battery cell 10. The bottom plate 20 has a first opening 203 and a second opening 204 on the side facing the battery cell 10. The first opening 203 communicates with the first flow channel 201, and the second opening 204 communicates with the second flow channel 202. The heat exchange plate 30 has internally formed... The heat exchange plate 30 is in contact with the side of the battery cell 10 and can exchange heat with the side of the battery cell 10. The heat exchange plate 30 is connected to the base plate 20, and the side of the heat exchange plate 30 facing the base plate 20 is provided with a first connecting port 303 and a second connecting port 304. The first connecting port 303 is sealed and connected to the first opening 203 to connect the first flow channel 201 and the third flow channel 301. The second connecting port 304 is sealed and connected to the second opening 204 to connect the second flow channel 202 and the fourth flow channel 302.

[0143] Specifically, such as Figure 4 As shown, the outer surface of the battery cell 10 includes a top surface 101, a bottom surface 102, and a side surface. A terminal post 105 may be provided on the top surface 101 of the battery cell 10. The bottom surface 102 of the battery cell 10 is arranged opposite to the top surface 101 of the battery cell 10. The side surface of the battery cell 10 is arranged between the bottom surface 102 and the top surface 101 of the battery cell 10. The side surface of the battery cell 10 includes a large side surface 103 and a small side surface 104. The large side surface 103 of the battery cell 10 refers to the plane with the largest area among the side surfaces of the battery cell 10, and the small side surface 104 of the battery cell 10 refers to the other planes among the side surfaces of the battery cell 10 excluding the large side surface.

[0144] Optionally, there may be multiple battery cells 10, and multiple battery cells 10 may be arranged in an array within the mounting cavity of the housing 120.

[0145] Specifically, contact between the base plate 20 and the bottom surface 102 of the battery cell 10 means that the base plate 20 and the bottom surface 102 of the battery cell 10 can be in direct or indirect contact. Indirect contact between the base plate 20 and the bottom surface 102 of the battery cell 10 can be achieved by applying an adhesive layer between the base plate 20 and the bottom surface 102 of the battery cell 10, so that the battery cell 10 can be fixed on the base plate 20.

[0146] Optionally, the side of the base plate 20 facing the battery cell 10 can be a plate surface on the outer surface of the base plate 20 that is perpendicular to the thickness direction of the base plate 20, and this plate surface can be the plane with the largest area on the outer surface of the base plate 20.

[0147] Specifically, side contact between the heat exchange plate 30 and the battery cell 10 means that the sides of the heat exchange plate 30 and the battery cell 10 can be in direct or indirect contact. Indirect side contact between the heat exchange plate 30 and the battery cell 10 can be achieved by applying an adhesive layer between the sides of the heat exchange plate 30 and the battery cell 10, so that the battery cell 10 can be fixedly connected to the heat exchange plate 30.

[0148] Optionally, the heat exchange plate 30 can be a metal part; wherein the material of the metal part can be aluminum alloy, etc. Alternatively, the heat exchange plate 30 can be a plastic part; wherein the material of the plastic part can be polyamide (PA), polyphenylene sulfide (PPS), polyphenylene oxyide (PPO), etc.

[0149] Optionally, such as Figure 7 As shown, the heat exchange plate 30 can be a long strip-shaped plate structure, and the plane with the largest area on the outer surface of the heat exchange plate 30 can be attached to the side of the battery cell 10. The heat exchange plate 30 can be attached to the sides of multiple battery cells 10 simultaneously; for example, multiple battery cells 10 can be arranged along the length of the heat exchange plate 30, and the sides of the multiple battery cells 10 can be coplanar, with the plane with the largest area on the outer surface of the heat exchange plate 30 attached to the sides of the coplanar battery cells 10.

[0150] Optionally, the side of the heat exchange plate 30 facing the bottom plate 20 can be a plate surface on the outer surface of the heat exchange plate 30 that is parallel to the thickness direction of the heat exchange plate 30, and this plate surface can be regarded as the bottom surface of the heat exchange plate 30.

[0151] Optionally, the number of heat exchange plates 30 can be one or more; when the number of heat exchange plates 30 is multiple, the multiple heat exchange plates 30 can be arranged side by side at intervals, and the space between two adjacent heat exchange plates 30 can be used to accommodate the battery cell 10.

[0152] Optionally, the heat exchange plate 30 can be an air-cooled heat exchange plate 30 or a liquid-cooled heat exchange plate 30, and the heat exchange medium flowing in the internal channels of the heat exchange plate 30 and the internal channels of the base plate 20 can be air, water, coolant, etc.

[0153] Optionally, the outer contour of the first connecting port 303 can be consistent with the outer contour of the first opening 203. The sealing connection between the first connecting port 303 and the first opening 203 can be achieved by providing a sealant on the outer periphery of the connection point, so that while the first flow channel 201 and the third flow channel 301 are connected, the heat exchange medium will not leak at the connection point between the first connecting port 303 and the first opening 203.

[0154] Optionally, the outer contour of the second connecting port 304 can be consistent with the outer contour of the second opening 204. The sealing connection between the second connecting port 304 and the second opening 204 can be achieved by providing a sealant on the outer periphery of the connection point, so that the second flow channel 202 and the fourth flow channel 302 are connected, while preventing the heat exchange medium from leaking at the connection point between the second connecting port 304 and the second opening 204.

[0155] Optionally, the number of first connection ports 303 on the heat exchange plate 30 can be one or more, and the number of second connection ports 304 can be one or more. It should be noted that the number of first connection ports 303 and second connection ports 304 may not be the same.

[0156] Optionally, the first connecting port 303 and the second connecting port 304 on the heat exchange plate 30 can be arranged along the length direction of the heat exchange plate 30; or, the first connecting port 303 and the second connecting port 304 can be arranged in a staggered manner along the length direction of the heat exchange plate 30.

[0157] Correspondingly, the number and position of the first opening 203 and the first connecting port 303 on the base plate 20 are set one-to-one, and the number and position of the second opening 204 and the second connecting port 304 are set one-to-one.

[0158] It should be noted that during assembly, the heat exchange plate 30 and the base plate 20 can be fixedly connected according to the correspondence between the first opening 203 and the first connecting port 303 and the correspondence between the second opening 204 and the second connecting port 304, and then the battery cell 10 can be placed into the housing 120. The battery cell 10 and the heat exchange plate 30 and / or the base plate 20 can be fixed with adhesive; or, the battery cell 10 and the heat exchange plate 30 can be fixedly connected (e.g., glued) as a whole first, and then the whole can be fixed to the base plate 20 according to the correspondence between the first opening 203 and the first connecting port 303 and the correspondence between the second opening 204 and the second connecting port 304.

[0159] Optionally, the inlet pipe 40 and the outlet pipe 50 can both be connected to the heat exchange medium supply mechanism, so that the heat exchange medium can circulate between the supply mechanism, the flow channel in the bottom plate 20 and the flow channel in the heat exchange plate 30.

[0160] Optionally, the inlet pipe 40 and the outlet pipe 50 can be located on the same side of the base plate 20. By designing the inlet pipe 40 and the outlet pipe 50 on the same side of the base plate 20, the layout of the battery device can be more reasonable, and it can be convenient to disassemble and maintain.

[0161] In the above technical solution, flow channels are formed within the bottom plate 20 of the housing 120. These flow channels can communicate with the flow channels within the heat exchange plate 30 and together form a circulation path for the heat exchange medium. The flow channels within the bottom plate 20 can provide heat exchange for the bottom surface of the battery cell 10, while the flow channels within the heat exchange plate 30 can provide heat exchange for the sides of the battery cell 10. By providing heat exchange for multiple surfaces of the battery cell 10, the heat dissipation efficiency of the battery device can be improved. In addition, the heat exchange plate 30 has a connecting port at its bottom for the inflow and outflow of the heat exchange medium, which eliminates the need for pipes on both sides of the heat exchange plate 30 along its length, thereby reducing the space occupied by pipes within the housing 120. This allows for more efficient and rational utilization of the internal space of the housing 120, thereby increasing the energy density of the battery device.

[0162] refer to Figure 10 , Figure 10 This is a schematic diagram of a first type of flow channel layout in a base plate according to some embodiments of this application.

[0163] In some embodiments, the first flow channel 201 is provided with an inlet and an outlet at both ends of its extension direction, and the inlet 2011 of the first flow channel is connected to the liquid inlet pipe 40; the second flow channel 202 is provided with an inlet and an outlet at both ends of its extension direction, the inlet 2021 of the second flow channel is connected to the outlet 2012 of the first flow channel, and the outlet 2022 of the second flow channel is connected to the liquid outlet pipe 50.

[0164] Specifically, the inlet 2011 of the first flow channel refers to the port where the heat exchange medium begins to enter the first flow channel 201, and the outlet 2012 of the first flow channel refers to the port where the heat exchange medium flowing in the first flow channel 201 exits from the first flow channel 201; the inlet 2021 of the second flow channel refers to the port where the heat exchange medium begins to enter the second flow channel 202, and the outlet 2022 of the second flow channel refers to the port where the heat exchange medium flowing in the second flow channel 202 exits from the second flow channel 202.

[0165] It should be noted that by setting the inlet 2011 and outlet of the first flow channel at both ends of its extension direction, the heat exchange medium can flow through the entire first flow channel 201 before entering the second flow channel 202. Similarly, by setting the inlet 2021 and outlet of the second flow channel at both ends of its extension direction, the heat exchange medium can flow through the entire second flow channel 202 before returning to the outlet pipe 50. This structural design allows the heat exchange medium to flow through more areas within the first and second flow channels 201 and 202, thus helping to improve the heat exchange capacity of the base plate 20.

[0166] It should be understood that the first flow channel 201 and the second flow channel 202 are not limited to being connected at the ends of their respective extension directions. They can also be connected at the middle section of the first flow channel 201 and the middle section of the second flow channel 202. The specific connection position between the first flow channel 201 and the second flow channel 202 can be adjusted according to design requirements. The comparison of the embodiments in this application is not limited.

[0167] In the above technical solution, the first flow channel 201 and the second flow channel 202 in the base plate 20, together with the liquid inlet pipe 40 and the liquid outlet pipe 50, can form a circulation path for the heat exchange medium, which can improve the heat exchange capacity of the first flow channel 201 and the second flow channel 202 in the base plate 20, thereby improving the heat dissipation efficiency of the bottom surface of the battery cell 10.

[0168] refer to Figure 11 , Figure 11 This is a schematic diagram of a second type of flow channel layout in the base plate according to some embodiments of this application.

[0169] In some embodiments, a first partition 205 is provided inside the base plate 20 to isolate the first flow channel 201 from the second flow channel 202.

[0170] Optionally, the first flow channel 201 and the second flow channel 202 extend in the same direction, and the first baffle 205 can be extended along the extension direction of the first flow channel 201 or the second flow channel 202 to separate the first flow channel 201 and the second flow channel 202.

[0171] Optionally, the first partition 205 and the base plate 20 can be integrally manufactured.

[0172] It should be noted that, since the flow channels within the heat exchange plate 30 are generally positioned higher than those within the base plate 20, a certain pressure is required to push the heat exchange medium into the heat exchange plate 30 when it enters from the first flow channel 201 within the base plate 20 into the third flow channel 301 within the heat exchange plate 30. Therefore, by setting a first baffle 205 to separate the first flow channel 201 from the second flow channel 202, pressure leakage is prevented when the heat exchange medium directly enters the second flow channel 202 from the first flow channel 201. This allows the pressure required for the heat exchange medium to enter the heat exchange plate 30 to quickly reach the first flow channel 201, thereby improving the circulation efficiency of the heat exchange medium.

[0173] In the above technical solution, by setting the first partition 205, the first flow channel 201 and the second flow channel 202 are not directly connected inside the bottom plate 20, so as to restrict the heat exchange medium in the first flow channel 201 to flow into the second flow channel 202 through the flow channel in the heat exchange plate 30 and form a circulation path of the heat exchange medium, so that the flow channel in the heat exchange plate 30 can flow through a sufficient amount of heat exchange medium, thereby improving the heat dissipation efficiency of the side of the battery cell 10.

[0174] refer to Figures 12 to 19 , Figure 12 This is a schematic diagram of a third flow channel layout within a base plate according to some embodiments of this application; Figure 13 This is a schematic diagram of a fourth type of flow channel layout in the base plate according to some embodiments of this application; Figure 14 This is a schematic diagram of the layout of a fifth flow channel within a base plate according to some embodiments of this application; Figure 15 This is a schematic diagram of the layout of a sixth flow channel in a base plate according to some embodiments of this application; Figure 16 This is a schematic diagram of the layout of a seventh flow channel within a base plate according to some embodiments of this application; Figure 17 This is a schematic diagram of the layout of an eighth flow channel within a base plate according to some embodiments of this application; Figure 18 This is a schematic diagram of the layout of a ninth flow channel in a base plate according to some embodiments of this application; Figure 19 This is a schematic diagram of the layout of a tenth flow channel in a base plate according to some embodiments of this application.

[0175] In some embodiments, the base plate 20 is provided with a second partition 206 to divide the first flow channel 201 and / or the second flow channel 202 into a plurality of first sub-flow channels 207.

[0176] The second partition 206 is installed inside the base plate 20, including at least the following situations:

[0177] I. For example Figure 12 As shown, a second baffle 206 is provided only in the first flow channel 201, and the first flow channel 201 is divided into multiple first sub-flow channels 207.

[0178] II. Figure 13 As shown, a second baffle 206 is provided only in the second flow channel 202, and the second flow channel 202 is divided into multiple first sub-flow channels 207.

[0179] III. Figure 14 As shown, a second baffle 206 is provided in both the first flow channel 201 and the second flow channel 202. The first flow channel 201 and the second flow channel 202 are both divided into multiple first sub-flow channels 207, and the number of first sub-flow channels 207 in the two flow channels may be the same or different.

[0180] In the above technical solution, by setting the second partition 206, on the one hand, the heat exchange medium can be guided to be distributed more evenly in the first flow channel 201 and / or the second flow channel 202, so as to improve the heat exchange uniformity of the battery cell 10; on the other hand, the structural strength of the first flow channel 201 and / or the second flow channel 202 can be strengthened, thereby enhancing the overall structural strength of the base plate 20 and the housing 120.

[0181] Furthermore, at least part of the first sub-channel 207 is connected end to end.

[0182] Among them, at least some of the first sub-channels 207 are connected end to end, including at least the following situations:

[0183] I. For example Figure 15 As shown, both the first flow channel 201 and the second flow channel 202 are divided into multiple first sub-flow channels 207. All first sub-flow channels 207 in the first flow channel 201 are connected end-to-end, and all first sub-flow channels 207 in the second flow channel 202 are also connected end-to-end. Two adjacent first sub-flow channels 207 in the first flow channel 201 and the second flow channel 202 are also connected end-to-end. This arrangement allows the flow channels within the base plate 20 to be arranged in an S-shape.

[0184] II. Figure 16 As shown, both the first flow channel 201 and the second flow channel 202 are divided into multiple first sub-flow channels 207. All first sub-flow channels 207 within the first flow channel 201 are connected end-to-end, and all first sub-flow channels 207 within the second flow channel 202 are also connected end-to-end. However, the first flow channel 201 and the second flow channel 202 are not connected to each other. This arrangement allows the first flow channel 201 and the second flow channel 202 within the base plate 20 to each have an S-shaped flow channel arrangement.

[0185] III. Figure 17 As shown, only the first flow channel 201 is divided into multiple first sub-flow channels 207, and some or all of the first sub-flow channels 207 are connected end to end.

[0186] IV. Figure 18 As shown, only the second flow channel 202 is divided into multiple first sub-flow channels 207, and some or all of the first sub-flow channels 207 are connected end to end.

[0187] In the above technical solution, by setting at least some of the first sub-channels 207 to be connected end to end, some or all of the first sub-channels 207 can be connected in sequence, thereby guiding the heat exchange medium to flow through most or all of the areas of the first channel 201 and / or the second channel 202, so as to improve the heat dissipation efficiency of the bottom surface of the battery cell 10.

[0188] Alternatively, such as Figure 19 As shown, the first flow channel 201 is divided into a plurality of first sub-flow channels 207 arranged side by side by the second partition 206, and the ends of the plurality of first sub-flow channels 207 in the first flow channel 201 near the inlet pipe 40 are all connected to the inlet pipe 40; and / or, the second flow channel 202 is divided into a plurality of first sub-flow channels 207 arranged side by side by the second partition 206, and the ends of the plurality of first sub-flow channels 207 in the second flow channel 202 near the outlet pipe 50 are all connected to the outlet pipe 50.

[0189] The first flow channel 201 is divided into multiple first sub-flow channels 207 arranged side by side by the second partition 206. The extension direction of the multiple first sub-flow channels 207 is consistent with the extension direction of the first flow channel 201. A diversion channel is provided at the end of the first flow channel 201 near the liquid inlet pipe 40. The diversion channel can connect the liquid inlet pipe 40 with the end of the multiple first sub-flow channels 207 near the liquid inlet pipe 40 and distribute the heat exchange medium through the liquid inlet pipe 40 to each of the first sub-flow channels 207. The ends of the multiple first sub-flow channels 207 away from the liquid inlet pipe 40 can be connected to each other or not connected.

[0190] It is understandable that the second flow channel 202 is divided by the second partition 206 into multiple first sub-flow channels 207 arranged side by side. The arrangement of the multiple first sub-flow channels 207 in the second flow channel 202 can be referred to the arrangement of the multiple first sub-flow channels 207 in the first flow channel 201 above, and will not be repeated here.

[0191] In the above technical solution, by setting multiple first sub-channels 207 in the first flow channel 201 and / or the second flow channel 202 to be arranged side by side and all of them connected to the inlet pipe 40 or the outlet pipe 50, the flow channel design in the base plate 20 can be simplified and the processing can be facilitated. Moreover, the multiple first sub-channels 207 arranged side by side can restrict the multiple second partitions 206 from being arranged side by side inside the base plate 20, which helps to improve the overall structural strength of the base plate 20.

[0192] refer to Figure 20 , Figure 20This is a schematic diagram of the layout of a first flow channel within a heat exchange plate according to some embodiments of this application.

[0193] In some embodiments, the third flow channel 301 is provided with an inlet and an outlet at both ends of its extension direction, and the inlet 3011 of the third flow channel is connected to the first communication port 303; the fourth flow channel 302 is provided with an inlet and an outlet at both ends of its extension direction, the inlet 3021 of the fourth flow channel is connected to the outlet 3012 of the third flow channel, and the outlet 3022 of the fourth flow channel is connected to the second communication port 304.

[0194] Specifically, the inlet 3011 of the third flow channel refers to the port where the heat exchange medium begins to enter the third flow channel 301. The inlet 3011 of the third flow channel can be the first connecting port 303. The outlet 3012 of the third flow channel refers to the port where the heat exchange medium flowing in the third flow channel 301 exits from the third flow channel 301. The inlet 3021 of the fourth flow channel refers to the port where the heat exchange medium begins to enter the fourth flow channel 302. The outlet 3022 of the fourth flow channel refers to the port where the heat exchange medium flowing in the fourth flow channel 302 exits from the fourth flow channel 302. The outlet 3022 of the fourth flow channel can be the second connecting port 304.

[0195] It should be noted that by placing the inlet 3011 and outlet of the third flow channel at both ends of the third flow channel 301 in its extension direction, the heat exchange medium can flow through the entire third flow channel 301 before entering the fourth flow channel 302. Similarly, by placing the inlet 3021 and outlet of the fourth flow channel at both ends of the fourth flow channel 302 in its extension direction, the heat exchange medium can flow through the entire fourth flow channel 302 before returning to the second flow channel 202. This structural design allows the heat exchange medium to flow through more areas within the third flow channel 301 and the fourth flow channel 302, which helps to improve the heat exchange capacity of the heat exchange plate 30.

[0196] It should be understood that the third flow channel 301 and the fourth flow channel 302 are not limited to being connected at the ends of their respective extension directions. They can also be connected at the middle section of the third flow channel 301 and the middle section of the fourth flow channel 302. The specific connection position between the third flow channel 301 and the fourth flow channel 302 can be adjusted according to design requirements. The comparison of the embodiments in this application is not limited.

[0197] In the above technical solution, by setting the connection between the third flow channel 301 and the fourth flow channel 302 at a position far away from the first connection port 303 and the second connection port 304, the heat exchange medium can flow through most or all of the area inside the heat exchange plate 30, thereby improving the heat dissipation efficiency of the side of the battery cell 10.

[0198] refer to Figures 21 to 25 , Figure 21This is a schematic diagram of a second flow channel layout within a heat exchange plate according to some embodiments of this application; Figure 22 This is a schematic diagram of a third flow channel layout within a heat exchange plate according to some embodiments of this application; Figure 23 This is a schematic diagram of a fourth flow channel layout within a heat exchange plate according to some embodiments of this application; Figure 24 This is a schematic diagram of a fifth flow channel layout within a heat exchange plate according to some embodiments of this application; Figure 25 This is a schematic diagram of the layout of a sixth flow channel in a heat exchange plate according to some embodiments of this application.

[0199] In some embodiments, the heat exchange plate 30 is provided with a third partition 305 to divide the third flow channel 301 and / or the fourth flow channel 302 into a plurality of second sub-flow channels 306.

[0200] The installation of a third baffle 305 inside the heat exchange plate 30 includes at least the following situations:

[0201] I. For example Figure 21 As shown, a third baffle 305 is provided only in the third flow channel 301, and the third flow channel 301 is divided into multiple second sub-flow channels 306.

[0202] II. Figure 22 As shown, a third baffle 305 is provided only in the fourth flow channel 302, and the fourth flow channel 302 is divided into multiple second sub-flow channels 306.

[0203] III. Figure 23 As shown, a third baffle 305 is provided in both the third flow channel 301 and the fourth flow channel 302. Both the third flow channel 301 and the fourth flow channel 302 are divided into multiple second sub-flow channels 306, and the number of second sub-flow channels 306 in the two flow channels may be the same or different.

[0204] In the above technical solution, by setting the third partition 305, on the one hand, the heat exchange medium can be guided to be distributed more evenly in the third flow channel 301 and / or the fourth flow channel 302, so as to improve the heat exchange uniformity of the battery cell 10; on the other hand, the structural strength of the third flow channel 301 and / or the fourth flow channel 302 can be strengthened, thereby enhancing the overall structural strength of the heat exchange plate 30.

[0205] Furthermore, at least part of the second sub-channel 306 is connected end to end.

[0206] Among them, at least some of the second sub-channels 306 are connected end to end, including at least the following situations:

[0207] I. For example Figure 24As shown, both the third flow channel 301 and the fourth flow channel 302 are divided into multiple second sub-flow channels 306. All second sub-flow channels 306 in the third flow channel 301 are connected end-to-end, and all second sub-flow channels 306 in the fourth flow channel 302 are also connected end-to-end. Two adjacent second sub-flow channels 306 in the third flow channel 301 and the fourth flow channel 302 are also connected end-to-end. This arrangement allows the flow channels within the heat exchange plate 30 to be arranged in an S-shape.

[0208] Second, only the third flow channel 301 is divided into multiple second sub-flow channels 306, and some or all of the second sub-flow channels 306 are connected end to end.

[0209] Third, only the fourth flow channel 302 is divided into multiple second sub-flow channels 306, and some or all of the second sub-flow channels 306 are connected end to end.

[0210] In the above technical solution, by setting at least some of the second sub-channels 306 to be connected end to end, some or all of the second sub-channels 306 can be connected in sequence, thereby guiding the heat exchange medium to flow through most or all of the areas of the third channel 301 and / or the fourth channel 302, so as to improve the heat dissipation efficiency of the side of the battery cell 10.

[0211] Alternatively, such as Figure 25 As shown, the third flow channel 301 is divided by the third partition 305 into a plurality of second sub-flow channels 306 arranged side by side. The ends of the plurality of second sub-flow channels 306 in the third flow channel 301 that are near the first connecting port 303 are all connected to the first connecting port 303, and the ends of the plurality of second sub-flow channels 306 in the third flow channel 301 that are away from the first connecting port 303 are all connected to the fourth flow channel 302; and / or, the fourth flow channel 302 is divided by the third partition 305 into a plurality of second sub-flow channels 306 arranged side by side. The ends of the plurality of second sub-flow channels 306 in the fourth flow channel 302 that are near the second connecting port 304 are all connected to the second connecting port 304, and the ends of the plurality of second sub-flow channels 306 in the fourth flow channel 302 that are away from the second connecting port 304 are all connected to the third flow channel 301.

[0212] The third flow channel 301 is divided into multiple second sub-flow channels 306 arranged side by side by the third partition 305. The extension direction of the multiple second sub-flow channels 306 in the third flow channel 301 is consistent with the extension direction of the third flow channel 301. A diversion channel is provided at the end of the third flow channel 301 near the first connection port 303. The diversion channel can connect the first connection port 303 with the end of the multiple second sub-flow channels 306 near the first connection port 303 and distribute the heat exchange medium through the first connection port 303 to each of the second sub-flow channels 306. The ends of the multiple second sub-flow channels 306 away from the first connection port 303 can be connected to each other and the heat exchange medium can be guided into the fourth flow channel 302 through this end.

[0213] It should be noted that a collection channel can be provided at the end of one of the multiple second sub-channels 306 in the third flow channel 301 that is away from the first connecting port 303. The collection channel can collect the heat exchange medium in each second sub-channel 306 and guide it into the fourth flow channel 302. The position of the collection channel is generally higher than that of the first connecting port 303. Under a certain pressure, the heat exchange medium can flow upward through the first connecting port 303 into the collection channel.

[0214] Optionally, the heat exchange channel can be positioned on the side of the battery cell 10 near the electrode post. Since heat is concentrated near the electrode post on the side of the battery cell 10, the heat exchange channel can collect the heat exchange medium from each of the second sub-channels 306, ensuring sufficient heat exchange medium for targeted heat exchange at the high-heat areas on the side of the battery cell 10. Furthermore, the heat exchange medium flows rapidly from the heat exchange channel to the fourth channel 302, accelerating the heat exchange efficiency at the side of the battery cell 10 near the electrode post.

[0215] It is understandable that the fourth flow channel 302 is divided into multiple second sub-flow channels 306 arranged side by side by the third partition 305. The arrangement of the multiple second sub-flow channels 306 in the fourth flow channel 302 can be referred to the arrangement of the multiple second sub-flow channels 306 in the third flow channel 301 above, and will not be repeated here.

[0216] In the above technical solution, by setting multiple second sub-channels 306 in the third flow channel 301 and / or the fourth flow channel 302 to be arranged side by side, and all of them connected to the first connecting port 303 or the second connecting port 304, the flow channel design in the heat exchange plate 30 can be simplified and the processing can be facilitated. Moreover, the multiple second sub-channels 306 arranged side by side can restrict multiple third baffles 305 from being arranged side by side inside the heat exchange plate 30, which helps to improve the overall structural strength of the heat exchange plate 30.

[0217] refer to Figure 26 and Figure 27 , Figure 26 This is a schematic diagram of the layout of an eleventh flow channel within a base plate according to some embodiments of this application; Figure 27 This is a schematic diagram of the layout of a seventh flow channel within a heat exchange plate according to some embodiments of this application.

[0218] In some embodiments, such as Figure 26 As shown, the first flow channel 201 and the second flow channel 202 are arranged alternately along the length of the heat exchange plate 30; and / or, as Figure 27 As shown, the third flow channel 301 and the fourth flow channel 302 are arranged alternately along the length of the heat exchange plate 30.

[0219] Optionally, each first flow channel 201 is respectively configured with an inlet pipe 40; or, at least some of the first flow channels 201 are connected to a common flow collection channel, which can be connected to one or more inlet pipes 40.

[0220] Optionally, each of the second flow channels 202 is respectively configured with a liquid outlet pipe 50; or, at least some of the second flow channels 202 are connected to a common flow collection channel, which can be connected to one or more liquid outlet pipes 50.

[0221] It should be noted that, under working conditions, the heat in the middle area of ​​the bottom surface of the battery cell 10 is generally greater than the heat in the side area of ​​the bottom surface of the battery cell 10. Furthermore, the first flow channel 201 is connected to the liquid inlet pipe 40, and the second flow channel 202 is connected to the liquid outlet pipe 50, which makes the temperature of the heat exchange medium in the first flow channel 201 generally lower than the temperature of the heat exchange medium in the second flow channel 202.

[0222] In the above technical solution, by setting the first flow channel 201 and the second flow channel 202 to be arranged alternately, the first flow channel 201 can be arranged in the middle area of ​​the bottom surface of each battery cell 10, and the second flow channel 202 can be arranged in the side area of ​​the bottom surface of each battery cell 10, which can improve the heat exchange uniformity of the bottom surface of each battery cell 10 in the housing 120.

[0223] Optionally, the third flow channel 301 is configured to correspond one-to-one with the first flow channel 201, and the fourth flow channel 302 is configured to correspond one-to-one with the second flow channel 202.

[0224] Optionally, each third flow channel 301 is respectively configured with a first connection port 303; or, at least some of the third flow channels 301 are connected to a common flow collection channel, which can be connected to one or more first connection ports 303.

[0225] Optionally, each fourth flow channel 302 is respectively configured with a second connection port 304; or, at least some of the fourth flow channels 302 are connected to a common flow collection channel, which can be connected to one or more second connection ports 304.

[0226] It should be noted that, under operating conditions, the heat in the middle area of ​​the side of the battery cell 10 is generally greater than the heat in the side edge area of ​​the battery cell 10. Furthermore, the third flow channel 301 is connected to the first flow channel 201, and the fourth flow channel 302 is connected to the second flow channel 202. The third flow channel 301 is closer to the inlet end of the heat exchange medium than the fourth flow channel 302, which makes the temperature of the heat exchange medium in the third flow channel 301 generally lower than the temperature of the heat exchange medium in the fourth flow channel 302.

[0227] In the above technical solution, by setting the third flow channel 301 and the fourth flow channel 302 alternately, the third flow channel 301 can be arranged in the middle area of ​​the side of each battery cell 10, and the fourth flow channel 302 can be arranged in the side side area of ​​each battery cell 10, which can improve the heat exchange uniformity of the side of each battery cell 10 in the housing 120.

[0228] refer to Figure 28 and Figure 29 , Figure 28 This is a schematic diagram of the layout of the twelfth flow channel in the base plate according to some embodiments of this application; Figure 29 This is a schematic diagram of the layout of an eighth flow channel in a heat exchange plate according to some embodiments of this application.

[0229] In some embodiments, such as Figure 28 As shown, the second flow channel 202 is disposed at at least one end of the bottom plate 20 along the length of the heat exchange plate 30; and / or, as Figure 29 As shown, the fourth flow channel 302 is disposed at at least one end of the heat exchange plate 30 along its length.

[0230] Optionally, the fourth flow channel 302 is configured to correspond one-to-one with the second flow channel 202.

[0231] It should be noted that the operating temperature of the battery cell 10 located in the end region of the battery device is generally lower than that of the battery cell 10 located in the middle region; the temperature of the heat exchange medium in the first flow channel 201 is generally lower than the temperature of the heat exchange medium in the second flow channel 202, and the temperature of the heat exchange medium in the third flow channel 301 is generally lower than the temperature of the heat exchange medium in the fourth flow channel 302.

[0232] In the above technical solution, by arranging the second flow channel 202 at at least one end of the base plate 20, and the first flow channel 201 being arranged in the middle region of the base plate 20, the second flow channel 202 can be correspondingly arranged on the bottom surface of the battery cell 10 located in the end region of the battery device, and the first flow channel 201 can be correspondingly arranged on the bottom surface of the battery cell 10 located in the middle region of the battery device. This can more rationally heat exchange the bottom surface of the battery cell 10 in different regions of the battery device, and improve the overall heat exchange uniformity of the battery device.

[0233] Similarly, by setting a fourth flow channel 302 at at least one end of the heat exchange plate 30, and a third flow channel 301 in the middle region of the heat exchange plate 30, the fourth flow channel 302 can be correspondingly arranged on the side of the battery cell 10 located in the end region of the battery device, and the third flow channel 301 can be correspondingly arranged on the side of the battery cell 10 located in the middle region of the battery device. This can more rationally heat exchange the sides of the battery cells 10 in different regions of the battery device, and improve the overall heat exchange uniformity of the battery device.

[0234] refer to Figures 30 to 32 As shown, Figure 30 This is a three-dimensional structural diagram of an adapter provided according to some embodiments of this application at one angle; Figure 31 This is a three-dimensional structural diagram of an adapter provided according to some embodiments of this application from another angle; Figure 32 This is a schematic diagram showing the assembly relationship between the adapter, heat exchange plate, and base plate provided according to some embodiments of this application.

[0235] In some embodiments, such as Figure 32 As shown, the first connecting port 303 and the first opening 203, as well as the second connecting port 304 and the second opening 204, are sealed and connected by an adapter 60.

[0236] Furthermore, such as Figure 30 and Figure 31 As shown, the adapter 60 includes a tube body; the tube body is divided into an upper tube section 602 and a lower tube section 603, the upper tube section 602 is configured to be inserted into the first connecting port 303 and the second connecting port 304 respectively, and the lower tube section 603 is configured to be inserted into the first opening 203 and the second opening 204 respectively; the tube body has a connecting hole 604 for connecting the first connecting port 303 and the first opening 203 and connecting the second connecting port 304 and the second opening 204.

[0237] Optionally, the outer peripheral surface of the upper pipe section 602 of the adapter 60 matches the inner peripheral surface of the first connecting port 303 or the second connecting port 304, so that the upper pipe section 602 can be adapted to be inserted into the first connecting port 303 or the second connecting port 304; the outer peripheral surface of the lower pipe section 603 of the adapter 60 matches the inner peripheral surface of the first opening 203 or the second opening 204, so that the lower pipe section 603 can be adapted to be inserted into the first opening 203 or the second opening 204; by adapting the upper pipe section 602 and the lower pipe section 603 of the adapter 60, the connection sealing between the first connecting port 303 and the first opening 203 and between the second connecting port 304 and the second opening 204 can be improved.

[0238] Optionally, sealant may be filled between the outer peripheral surface of the upper pipe section 602 of the adapter 60 and the inner peripheral surface of the first connecting port 303 or the second connecting port 304, and between the outer peripheral surface of the lower pipe section 603 of the adapter 60 and the inner peripheral surface of the first opening 203 or the second opening 204, to further improve the connection sealing between the heat exchange plate 30 and the base plate 20.

[0239] Furthermore, such as Figure 30 and Figure 31 As shown, the adapter 60 also includes a flange 601 surrounding the outer periphery of the tube body; the flange 601 has a first abutment surface 6011 and a second abutment surface 6012, the first abutment surface 6011 is configured to abut against the surface of the heat exchange plate 30 facing the bottom plate 20, and the second abutment surface 6012 is configured to abut against the surface of the bottom plate 20 facing the heat exchange plate 30.

[0240] Optionally, the flange 601 of the adapter 60 has a ring structure.

[0241] Optionally, the first abutting surface 6011 and the second abutting surface 6012 are two opposite surfaces on the flange 601.

[0242] Optionally, sealant may be filled between the surfaces of the first contact surface 6011 and the heat exchange plate 30, and between the surfaces of the second contact surface 6012 and the base plate 20, to further improve the connection sealing between the heat exchange plate 30 and the base plate 20.

[0243] Optionally, the first contact surface 6011 and the second contact surface 6012 can be flat surfaces or surfaces with anti-slip protrusions.

[0244] It should be noted that during assembly, the adapter 60 can be fixed to the connection port of the heat exchange plate 30 first, and then the lower pipe section 603 of the adapter 60 can be connected to the opening on the base plate 20 to achieve positioning assembly between the heat exchange plate 30 and the base plate 20. Alternatively, during assembly, the adapter 60 can be fixed to the opening on the base plate 20 first, and then the upper pipe section 602 of the adapter 60 can be connected to the connection port on the heat exchange plate 30 to achieve positioning assembly between the heat exchange plate 30 and the base plate 20.

[0245] In the above technical solution, by setting an adapter 60 between the base plate 20 and the heat exchange plate 30 for docking, the heat exchange plate 30 can be positioned and assembled onto the base plate 20, and the sealing between the opening of the base plate 20 and the communication port of the heat exchange plate 30 can be improved.

[0246] Furthermore, adapter 60 is a rubber component.

[0247] In the above technical solution, by designing the adapter 60 as a rubber part, the sealing between the opening of the base plate 20 and the connection port of the heat exchange plate 30 can be further improved.

[0248] refer to Figure 33 and Figure 34 , Figure 33 This is a schematic diagram showing the assembly relationship between the first positioning tube, the heat exchange plate, and the base plate according to some embodiments of this application; Figure 34 This is a schematic diagram showing the assembly relationship between the second positioning tube, the heat exchange plate, and the base plate according to some embodiments of this application.

[0249] In some embodiments, a first positioning tube 70 is provided on the side of the base plate 20 facing the mounting cavity. The first positioning tube 70 is connected to the outer periphery of the first opening 203 and the second opening 204, and the first positioning tube 70 is configured to be inserted into the first connecting port 303 and the second connecting port 304 respectively. Alternatively, a second positioning tube 80 is provided on the side of the heat exchange plate 30 facing the base plate 20. The second positioning tube 80 is connected to the outer periphery of the first connecting port 303 and the second connecting port 304, and the second positioning tube 80 is configured to be inserted into the first opening 203 and the second opening 204 respectively.

[0250] Optionally, the first positioning tube 70 and the base plate 20 can be fixed by snap-fitting, adhesive bonding, or integrally formed.

[0251] Optionally, the outer peripheral surface of the first positioning tube 70 matches the inner peripheral surface of the first connecting port 303 or the second connecting port 304; sealant may be filled between the outer peripheral surface of the first positioning tube 70 and the inner peripheral surface of the first connecting port 303 or the second connecting port 304.

[0252] Optionally, the second positioning tube 80 and the heat exchange plate 30 can be fixed by snap-fit, glue, or made as a single piece.

[0253] Optionally, the outer peripheral surface of the second positioning tube 80 matches the inner peripheral surface of the first opening 203 or the second opening 204; sealant may be filled between the outer peripheral surface of the second positioning tube 80 and the inner peripheral surface of the first opening 203 or the second opening 204.

[0254] In the above technical solution, by setting a first positioning tube 70 on the base plate 20 or a second positioning tube 80 on the heat exchange plate 30, the base plate 20 and the heat exchange plate 30 can be positioned and assembled, thereby reducing assembly difficulty and improving assembly efficiency.

[0255] refer to Figure 3 and Figure 5 In some embodiments, the housing 120 further includes a side wall 90, which together with the bottom plate 20 defines an installation cavity; the end of the heat exchange plate 30 along its length is connected to the side wall 90.

[0256] Optionally, the heat exchange plate 30 has two ends in its length direction, at least one of which can be connected and fixed to the side wall 90.

[0257] Optionally, the two opposing surfaces of the heat exchange plate 30 and the side wall 90 can abut against each other to achieve the connection between the heat exchange plate 30 and the side wall 90.

[0258] Optionally, the connection between the heat exchange plate 30 and the side wall 90 can be achieved by bolt locking, snap-fit ​​fixing, adhesive fixing, etc.

[0259] In the above technical solution, by connecting the end of the heat exchange plate 30 to the side wall 90 of the housing 120, the overall structural strength of the battery device can be improved.

[0260] refer to Figures 3 to 34The battery device provided in this application embodiment includes an inlet pipe 40, an outlet pipe 50, a housing 120 with a mounting cavity, and a battery cell 10 and a heat exchange plate 30 housed within the mounting cavity. The housing 120 includes a bottom plate 20, the interior of which is formed a first flow channel 201 and a second flow channel 202 for the flow of heat exchange medium. The first flow channel 201 communicates with the inlet pipe 40, and the second flow channel 202 communicates with the outlet pipe 50. The bottom plate 20 contacts the bottom surface 102 of the battery cell 10 and is capable of exchanging heat with it. A first opening 203 and a second opening 204 are provided on the side of the bottom plate 20 facing the battery cell 10. The first opening 203 communicates with the first flow channel 201, and the second opening 204 communicates with the second flow channel 202. The heat exchange plate 30 is internally provided with… The third flow channel 301 and the fourth flow channel 302 are used for the flow of heat exchange medium and are interconnected. The heat exchange plate 30 contacts the side of the battery cell 10 and can exchange heat with the side of the battery cell 10. The heat exchange plate 30 is connected to the base plate 20, and the side of the heat exchange plate 30 facing the base plate 20 is provided with a first connecting port 303 and a second connecting port 304. The first connecting port 303 is sealed and connected to the first opening 203 to connect the first flow channel 201 and the third flow channel 301; and the second connecting port 304 is sealed and connected to the second opening 204 to connect the second flow channel 202 and the fourth flow channel 302. The first flow channel 201 is provided with an inlet and an outlet at both ends in its extension direction. The inlet 2011 of the first flow channel is connected to the liquid inlet pipe 40. The second flow channel 202 is provided with an inlet and an outlet at both ends in its extension direction. The inlet 2021 of the second flow channel is connected to the outlet 2012 of the first flow channel, and the outlet 2022 of the second flow channel is connected to the liquid outlet pipe 50. The base plate 20 is internally provided with a second partition 206 to divide the first flow channel 201 and / or the second flow channel 202 into a plurality of first sub-flow channels 207. The first flow channel 201 is divided by the second partition 206 into a plurality of first sub-flow channels 207 arranged side by side, and the ends of the plurality of first sub-flow channels 207 in the first flow channel 201 near the inlet pipe 40 are all connected to the inlet pipe 40; and / or, the second flow channel 202 is divided by the second partition 206 into a plurality of first sub-flow channels 207 arranged side by side, and the ends of the plurality of first sub-flow channels 207 in the second flow channel 202 near the outlet pipe 50 are all connected to the outlet pipe 50. The third flow channel 301 has an inlet and an outlet at both ends of its extension direction, and the inlet 3011 of the third flow channel is connected to the first connecting port 303; the fourth flow channel 302 has an inlet and an outlet at both ends of its extension direction, the inlet 3021 of the fourth flow channel is connected to the outlet 3012 of the third flow channel, and the outlet 3022 of the fourth flow channel is connected to the second connecting port 304. A third baffle 305 is provided inside the heat exchange plate 30 to divide the third flow channel 301 and / or the fourth flow channel 302 into multiple second sub-flow channels 306.The third flow channel 301 is divided by the third partition 305 into a plurality of second sub-flow channels 306 arranged side by side. The ends of the plurality of second sub-flow channels 306 in the third flow channel 301 that are near the first connecting port 303 are all connected to the first connecting port 303, and the ends of the plurality of second sub-flow channels 306 in the third flow channel 301 that are away from the first connecting port 303 are all connected to the fourth flow channel 302; and / or, the fourth flow channel 302 is divided by the third partition 305 into a plurality of second sub-flow channels 306 arranged side by side. The ends of the plurality of second sub-flow channels 306 in the fourth flow channel 302 that are near the second connecting port 304 are all connected to the second connecting port 304, and the ends of the plurality of second sub-flow channels 306 in the fourth flow channel 302 that are away from the second connecting port 304 are all connected to the third flow channel 301. The second flow channel 202 is disposed at at least one end of the base plate 20 along the length of the heat exchange plate 30; and / or, the fourth flow channel 302 is disposed at at least one end of the heat exchange plate 30 along the length of the heat exchange plate 30. The first connecting port 303 and the first opening 203, and the second connecting port 304 and the second opening 204 are sealed together by an adapter 60. The adapter 60 includes a tube body and a flange 601 surrounding the outer periphery of the tube body. The tube body is divided into an upper tube section 602 and a lower tube section 603. The upper tube section 602 is configured to be inserted into a first connecting port 303 and a second connecting port 304, and the lower tube section 603 is configured to be inserted into a first opening 203 and a second opening 204. The tube body has a connecting hole 604 for connecting the first connecting port 303 and the first opening 203, and connecting the second connecting port 304 and the second opening 204. The flange 601 has a first abutting surface 6011 and a second abutting surface 6012. The first abutting surface 6011 is configured to abut against the surface of the heat exchange plate 30 facing the base plate 20, and the second abutting surface 6012 is configured to abut against the surface of the base plate 20 facing the mounting cavity. The inlet pipe 40 and the outlet pipe 50 are located on the same side of the base plate 20. The housing 120 also includes a side wall 90, which together with the bottom plate 20 defines an installation cavity; the end of the heat exchange plate 30 along its length is connected to the side wall 90.

[0261] Secondly, embodiments of this application also provide an electrical device, including a battery device provided in any of the embodiments of the first aspect, the battery device being used to provide electrical energy.

[0262] In the above technical solution, by adopting the battery device in the first aspect, the electrical equipment can eliminate the pipes on both sides of the heat exchange plate 30 in its length direction, thereby reducing the space occupied by the pipes in the housing 120, and making more efficient and reasonable use of the internal space of the housing 120 to improve the energy density of the battery device; moreover, by exchanging heat with the multiple surfaces of the battery cell 10 through the bottom plate 20 and the heat exchange plate 30, the heat dissipation efficiency of the battery device can be improved.

[0263] Thirdly, embodiments of this application also provide an energy storage device, including a battery device provided in any of the embodiments of the first aspect, the battery device being used to store electrical energy.

[0264] In the above technical solution, by adopting the battery device in the first aspect, the energy storage device can eliminate the pipes on both sides of the heat exchange plate 30 in its length direction, thereby reducing the space occupied by the pipes in the housing 120, and making more efficient and reasonable use of the internal space of the housing 120 to improve the energy density of the battery device; moreover, by exchanging heat on multiple surfaces of the battery cell 10 through the bottom plate 20 and the heat exchange plate 30, the heat dissipation efficiency of the battery device can be improved.

[0265] The description of the various embodiments above tends to emphasize the differences between the various embodiments. The similarities or similarities between them can be referred to, and for the sake of brevity, they will not be repeated here.

[0266] 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. This application is not limited to the specific embodiments applied herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, characterized in that, It includes an inlet pipe, an outlet pipe, a housing with a mounting cavity, and a battery cell and a heat exchange plate housed within the mounting cavity; The housing includes a bottom plate, and the bottom plate has a first flow channel and a second flow channel formed inside for the flow of heat exchange medium. The first flow channel is connected to the liquid inlet pipe, and the second flow channel is connected to the liquid outlet pipe. The bottom plate is in contact with the bottom surface of the battery cell and can exchange heat with the bottom surface of the battery cell. The base plate has a first opening and a second opening on the side facing the battery cell. The first opening is connected to the first flow channel, and the second opening is connected to the second flow channel. The heat exchange plate is provided with a third flow channel and a fourth flow channel inside for the flow of heat exchange medium and they are interconnected. The heat exchange plate is in contact with the side of the battery cell and can exchange heat with the side of the battery cell. The heat exchange plate is connected to the base plate, and the heat exchange plate has a first communication port and a second communication port on the side facing the base plate. Wherein, the first connecting port is sealed and connected to the first opening to connect the first flow channel and the third flow channel; and the second connecting port is sealed and connected to the second opening to connect the second flow channel and the fourth flow channel.

2. The battery device according to claim 1, characterized in that, The first flow channel has an inlet and an outlet at both ends in its extending direction, and the inlet of the first flow channel is connected to the liquid inlet pipe; The second flow channel has an inlet and an outlet at both ends in its extension direction. The inlet of the second flow channel is connected to the outlet of the first flow channel, and the outlet of the second flow channel is connected to the liquid outlet pipe.

3. The battery device according to claim 1, characterized in that, The base plate has a first partition inside to isolate the first flow channel from the second flow channel.

4. The battery device according to claim 1, characterized in that, The base plate is provided with a second partition to divide the first flow channel and / or the second flow channel into a plurality of first sub-flow channels.

5. The battery device according to claim 4, characterized in that, At least part of the first sub-channel is connected end to end.

6. The battery device according to claim 4, characterized in that, The first flow channel is divided into multiple first sub-flow channels arranged side by side by the second partition, and the ends of the multiple first sub-flow channels within the first flow channel near the inlet pipe are all connected to the inlet pipe; and / or, The second flow channel is divided into multiple first sub-flow channels arranged side by side by the second partition. The ends of the multiple first sub-flow channels in the second flow channel that are close to the liquid outlet pipe are all connected to the liquid outlet pipe.

7. The battery device according to claim 1, characterized in that, The third flow channel has an inlet and an outlet at both ends in its extension direction, and the inlet of the third flow channel is connected to the first communication port. The fourth flow channel has an inlet and an outlet at both ends in its extension direction. The inlet of the fourth flow channel is connected to the outlet of the third flow channel, and the outlet of the fourth flow channel is connected to the second connection port.

8. The battery device according to claim 1, characterized in that, The heat exchange plate is provided with a third baffle to divide the third flow channel and / or the fourth flow channel into a plurality of second sub-flow channels.

9. The battery device according to claim 8, characterized in that, At least part of the second sub-channel is connected end to end.

10. The battery device according to claim 8, characterized in that, The third flow channel is divided into multiple second sub-flow channels arranged side by side by the third partition. The ends of each of the multiple second sub-flow channels within the third flow channel closest to the first connecting opening are connected to the first connecting opening, and the ends of each of the multiple second sub-flow channels within the third flow channel furthest from the first connecting opening are connected to the fourth flow channel; and / or, The fourth flow channel is divided into multiple second sub-flow channels arranged side by side by the third partition. The ends of the multiple second sub-flow channels in the fourth flow channel that are closer to the second connecting port are all connected to the second connecting port, and the ends of the multiple second sub-flow channels in the fourth flow channel that are farther away from the second connecting port are all connected to the third flow channel.

11. The battery device according to claim 1, characterized in that, The first flow channel and the second flow channel are arranged alternately along the length of the heat exchange plate; and / or, The third flow channel and the fourth flow channel are arranged alternately along the length of the heat exchange plate.

12. The battery device according to claim 1, characterized in that, The second flow channel is disposed at at least one end of the base plate along the length of the heat exchange plate; and / or, The fourth flow channel is disposed at at least one end of the heat exchange plate along its length.

13. The battery device according to any one of claims 1-12, characterized in that, The first connecting port and the first opening, as well as the second connecting port and the second opening, are sealed and connected by an adapter.

14. The battery device according to claim 13, characterized in that, The adapter includes a tube body; The pipe body is divided into an upper pipe section and a lower pipe section. The upper pipe section is configured to be inserted into the first connecting port and the second connecting port respectively, and the lower pipe section is configured to be inserted into the first opening and the second opening respectively. The tube has a connecting hole for connecting the first connecting port with the first opening and for connecting the second connecting port with the second opening.

15. The battery device according to claim 14, characterized in that, The adapter also includes a flange surrounding the outer periphery of the tube body; The flange has a first abutting surface and a second abutting surface, the first abutting surface being configured to abut against the surface of the heat exchange plate facing the base plate, and the second abutting surface being configured to abut against the surface of the base plate facing the heat exchange plate.

16. The battery device according to claim 13, characterized in that, The adapter is a rubber component.

17. The battery device according to any one of claims 1-12, characterized in that, A first positioning tube is provided on the side of the base plate facing the mounting cavity. The first positioning tube is connected to the outer periphery of the first opening and the second opening, and is configured to be inserted into the first communication port and the second communication port respectively; or... A second positioning tube is provided on the side of the heat exchange plate facing the base plate. The second positioning tube is connected to the outer periphery of the first communication port and the second communication port. The second positioning tube is configured to be able to be inserted into the first opening and the second opening respectively.

18. The battery device according to any one of claims 1-12, characterized in that, The housing also includes a side wall, which, together with the bottom plate, defines the mounting cavity. The heat exchange plate is connected to the side wall at its end along its length.

19. An electrical appliance, characterized in that, The battery device includes any one of claims 1-18, the battery device being used to provide electrical energy.

20. An energy storage device, characterized in that, The battery device includes any one of claims 1-18, the battery device being used to store electrical energy.

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