Battery device, thermal management component and electric device

Abstract

The present application belongs to the technical field of battery production. Provided are a battery device, a thermal management component and an electric device. The battery device comprises a case assembly, a battery cell assembly and the thermal management component, wherein an accommodating cavity is provided inside the case assembly; the battery cell assembly is arranged in the accommodating cavity; a refrigerant circulates in the thermal management component; the thermal management component is configured to perform heat exchange with the battery cell assembly; and a heat exchange flow channel is provided inside the thermal management component, the heat exchange flow channel comprising a plurality of heat exchange sub-flow channels arranged in parallel, each heat exchange sub-flow channel comprising an upstream flow channel and a downstream flow channel in communication with each other, upstream flow channels in some heat exchange sub-flow channels being adjacent to and in thermal contact with downstream flow channels in adjacent heat exchange sub-flow channels, and downstream flow channels in some heat exchange sub-flow channels being adjacent to and in thermal contact with upstream flow channels in adjacent heat exchange sub-flow channels. The present application aims to improve the uniform heat-dissipation capability of the thermal management component.

Description

Battery devices, thermal management components and electrical appliances

[0001] This application claims priority to Chinese Patent Application No. 2025101996253, filed with the State Intellectual Property Office of China on February 21, 2025, entitled "Battery Device, Refrigerant Heat Exchange Component and Electrical Device", the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of battery manufacturing technology, and in particular to a battery device, thermal management component, and electrical device. Background Technology

[0003] During the charging and discharging process, the battery devices in new energy vehicles release a lot of heat. The battery devices are usually equipped with thermal management components that can exchange heat between individual battery cells to cool down the individual battery cells.

[0004] In related technologies, the heat exchange between the thermal management components and the individual battery cells is uneven, causing some individual battery cells to overheat and accumulate a large amount of heat inside the battery device, thereby affecting the performance and lifespan of the battery device. Summary of the Invention

[0005] The purpose of this application is to provide a battery device, a thermal management component, and an electrical device, in order to solve the technical problem of poor temperature uniformity performance of the thermal management component in the battery device. Technical solutions

[0006] The technical solution adopted in the embodiments of this application is:

[0007] In a first aspect, this application provides a battery device, comprising:

[0008] The housing assembly has an internal cavity;

[0009] The battery cell assembly is housed within the receiving cavity;

[0010] Thermal management components, through which refrigerant flows;

[0011] The thermal management component is configured to exchange heat with the battery cell assembly; the thermal management component has a heat exchange channel inside, which includes multiple heat exchange sub-channels arranged in parallel, each heat exchange sub-channel including an upstream channel and a downstream channel connected to each other, and the upstream channel in some heat exchange sub-channels is adjacent to and thermally connected to the downstream channel in the adjacent heat exchange sub-channel; and / or, the downstream channel in some heat exchange sub-channels is adjacent to and thermally connected to the upstream channel in the adjacent heat exchange sub-channel.

[0012] In this embodiment, the upstream and downstream channels in two adjacent heat exchange sub-channels are configured to be adjacent to each other. The low temperature of the upstream channel can balance the high temperature of the downstream channel, thereby reducing the temperature of the area on the heat exchange surface corresponding to the downstream channel. This makes it less likely for an overheated zone to form, thus reducing the area of ​​the overheated zone. This is beneficial for improving the heat exchange effect on the battery cell module and making the temperature distribution on the heat exchange surface of the thermal management component more uniform, thereby improving the heat exchange uniformity of the battery cell module.

[0013] In one embodiment, a portion of the heat exchange sub-channel includes a first heat exchange sub-channel and a second heat exchange sub-channel; the second heat exchange sub-channel is located on one side of the first heat exchange sub-channel and is disposed adjacent to the first heat exchange sub-channel, and the downstream channel in the first heat exchange sub-channel is adjacent to and thermally connected to the upstream channel in the second heat exchange sub-channel.

[0014] In this embodiment, the downstream flow channel in the first heat exchange sub-channel and the upstream flow channel in the second heat exchange sub-channel are arranged adjacent to each other and thermally coordinated, so that the low temperature of the upstream flow channel can balance the high temperature of the downstream flow channel, thereby reducing the temperature of the area on the heat exchange surface corresponding to the downstream flow channel and making it less likely to form an overheated zone.

[0015] In one embodiment, a portion of the heat exchanger sub-channels includes a first heat exchanger sub-channel, a second heat exchanger sub-channel, and a third heat exchanger sub-channel; the second and third heat exchanger sub-channels are respectively located on both sides of the first heat exchanger sub-channel and are arranged adjacent to the first heat exchanger sub-channel; the downstream channel in the first heat exchanger sub-channel is adjacent to and thermally connected to the upstream channel in the second heat exchanger sub-channel; and

[0016] The upstream flow channel in the first heat exchanger sub-channel is adjacent to and thermally compatible with the downstream flow channel in the third heat exchanger sub-channel.

[0017] In this embodiment, the upstream and downstream channels in the first heat exchange sub-channel are respectively configured adjacent to the downstream channels in the third heat exchange sub-channel and the upstream channels in the second heat exchange sub-channel on both sides, and thermally coordinated. This allows the low temperature of the upstream channel to balance the high temperature of the downstream channel, reducing the temperature of the area on the heat exchange surface corresponding to the downstream channel, thus making it less likely to form an overheated zone and improving the heat exchange uniformity of the battery cell module.

[0018] In one embodiment, a plurality of heat exchange sub-channels are arranged sequentially along a first direction, and the upstream and downstream channels of the heat exchange sub-channels are both extended along a second direction, which is perpendicular to the first direction.

[0019] In this embodiment, extending the upstream and downstream flow channels in the second direction and setting them adjacent to each other is beneficial to increasing the length of the adjacent area between the upstream and downstream flow channels, which in turn increases the area of ​​adjacent heat exchange and improves the efficiency of heat exchange.

[0020] In one embodiment, the heat exchange channel further includes at least one inlet channel and at least one outlet channel, the inlet channel being connected to a plurality of upstream channels and the outlet channel being connected to a plurality of downstream channels.

[0021] In this embodiment, one inlet channel can connect to multiple upstream channels, and one outlet channel can connect to multiple downstream channels. This helps to increase the number of upstream and downstream channels, and to make reasonable planning and layout, thereby improving the uniformity of the layout and improving the temperature uniformity of the heat exchange surface.

[0022] In one embodiment, the heat exchange channel further includes a first branch channel and a plurality of second branch channels, each of which is connected to the first branch channel. The first branch channel extends along a first direction and is connected to the inlet channel. Each of the second branch channels extends along a second direction and is respectively connected to each of the upstream channels. The second direction is perpendicular to the first direction.

[0023] In this embodiment, the first branch channel extends along the first direction to be consistent with the arrangement direction of each heat exchange sub-channel, which is beneficial to improving the smoothness of heat exchange medium flow; each second branch channel is perpendicular to the first branch channel and is opposite to each downstream channel, which improves the smoothness of heat exchange medium flow, helps to reduce the flow path of heat exchange medium, and reduces heat exchange loss.

[0024] In one embodiment, the inlet channel and the outlet channel are arranged adjacent to each other.

[0025] In this embodiment, the adjacent arrangement of the inlet and outlet channels helps to achieve temperature balance, increase the flow rate of the heat exchange refrigerant, and thus balance the temperature difference of the heat exchange surface.

[0026] In one embodiment, the two ends of the heat exchange channel are respectively configured as downstream channels along the first direction.

[0027] In this embodiment, the two ends of the first direction are matched with the downstream flow channel to achieve coordinated temperature matching, which is more conducive to achieving balanced heat dissipation of the battery cell assembly.

[0028] In one embodiment, along the first direction, the inlet channel and the outlet channel are located on the same side; the heat exchange channel further includes a loop guide channel, each downstream channel having a sub-outlet on the side away from the inlet channel, and the outlet channel being configured to be connected to each sub-outlet via the loop guide channel; along the first direction, the loop guide channel is located at one or both ends of the heat exchange channel.

[0029] In this embodiment, the circuit guide channel is positioned to correspond to the battery cell assembly with a relatively low temperature at the edge, which helps to reduce the impact of the overheated zone on the battery cell assembly and facilitates balanced heat exchange for the battery cell assembly.

[0030] In one embodiment, the loop guide channel includes a plurality of guide sub-channels extending and communicating along a second direction, the plurality of guide sub-channels communicating between the outlet channel and each sub-outlet.

[0031] In this embodiment, by setting multiple guide sub-channels extending along the second direction, the return flow of the heat exchange channel is made smoother, which is conducive to improving the space utilization rate within the thermal management component and making the layout of the heat exchange channel more reasonable.

[0032] In one embodiment, along a first direction, two adjacent guide channels have a first interval distance; each heat exchange channel has multiple upstream channels arranged at intervals along the first direction, and two adjacent upstream channels have a second interval distance; each heat exchange channel has multiple downstream channels arranged at intervals along the first direction, and two adjacent downstream channels have a third interval distance; the first interval distance is smaller than the second interval distance and the third interval distance.

[0033] In this embodiment, by making the spacing between multiple guide channels smaller than the spacing between downstream channels and upstream channels, it is beneficial to reduce the area of ​​the corresponding region of the loop guide channels on the heat exchange surface, and thus reduce the area of ​​the overheated zone.

[0034] In one embodiment, an edge region is formed on the surface of the thermal management component near the edge, and the edge region is formed at one or both ends of the heat exchange surface, with the loop guide channel configured corresponding to the edge region.

[0035] In this embodiment, the edge region of the thermal management component corresponds to the loop guide channel, which can correspond to the battery cell assembly in the edge region with a lower temperature, thereby improving the balanced heat dissipation of the battery cell assembly.

[0036] In one embodiment, the edge region avoids the battery cell assembly.

[0037] In this embodiment, the battery cell assembly is made to avoid edge areas that are prone to overheating, thereby reducing the impact of overheating on the battery cell assembly and protecting it.

[0038] In one embodiment, the thermal management component has a heat exchange surface having a first region and a second region. In a first direction, the second region is located in the middle of the heat exchange surface, and the first region is distributed on both sides of the second region. A plurality of heat exchange sub-channels correspond to the second region and a plurality of heat exchange sub-channels correspond to the first region. The flow path from the inlet channel to the upstream channel of the plurality of heat exchange sub-channels corresponding to the second region is smaller than the flow path from the inlet channel to the upstream channel of the plurality of heat exchange sub-channels corresponding to the first region.

[0039] In this embodiment, by reducing the flow path of the heat exchange medium into the upstream flow channel corresponding to the second region, the heat exchange medium can reach the upstream flow channel of the region more promptly, thereby achieving the purpose of rapidly cooling the battery cell assembly in the middle region. This helps to reduce the risk of a sharp increase in the temperature of the battery cell assembly in the middle region and facilitates balanced heat exchange for the battery cell assembly.

[0040] In one embodiment, the thermal management component has a flow channel group inside, the flow channel group including two heat exchange channels, the thermal management component has a symmetry plane, and the two heat exchange channels are symmetrically arranged on both sides of the symmetry plane.

[0041] In this embodiment, by designing two symmetrically arranged heat exchange channels, it is beneficial to improve the balanced heat dissipation of the battery cell assembly by the thermal management components.

[0042] In one embodiment, the battery cell assembly includes a plurality of battery cell modules arranged along a first direction, and each battery cell module includes a plurality of battery cells arranged along a second direction.

[0043] In this embodiment, the arrangement of the battery cell assembly is matched with the arrangement of the heat exchange channel, which helps to improve the uniformity of heat exchange between the battery cell assembly and the heat exchange channel.

[0044] In one embodiment, the thermal management component is located within the housing cavity and disposed on the bottom of the housing assembly to support the battery cell assembly.

[0045] In this embodiment, the thermal management component is placed on the bottom of the housing assembly, thereby achieving bottom heat exchange of the battery cell assembly. The large heat exchange area is beneficial to improving heat exchange efficiency.

[0046] In one embodiment, the housing assembly includes a housing body, a thermal management component connected to the housing body and together with the housing body forming a receiving cavity, a battery cell assembly being housed within the receiving cavity, and the thermal management component being able to support the battery cell assembly.

[0047] In this embodiment, the thermal management component can be connected to the box body and can form the box bottom plate, so that it can exchange heat with the battery cell assembly while also supporting the battery cell assembly, which helps to simplify the structure of the external box body and reduce the weight of the battery device.

[0048] In one embodiment, the battery device further includes a connector component that is connected to the thermal management component and is respectively connected to each inlet flow channel and each outlet flow channel.

[0049] In this embodiment, by providing a connector component, it is easy to connect to an external pipeline used for conveying fluid, thereby improving the ease of assembly.

[0050] In one embodiment, the width of the heat exchange channel ranges from 6 to 15 mm.

[0051] In this embodiment, the width of the heat exchange channel is set to 6-15 mm. This width range ensures that the refrigerant circulates under reasonable pressure drop and flow rate, thus ensuring the stable operation of the thermal management system of the entire battery device.

[0052] In one embodiment, the width of the heat exchange channel ranges from 6 to 10 mm.

[0053] In this embodiment, a width range of 6-10mm can improve the heat exchange performance of the thermal management component while also taking into account its structural strength. This prevents the thermal management component from having an excessively wide heat exchange channel that weakens its strength, thus achieving a balance between the heat exchange performance and structural strength of the thermal management component.

[0054] In one embodiment, the heat exchange channel is filled with a phase change medium.

[0055] In this embodiment, filling the heat exchange channel with a phase change medium is beneficial to improving heat exchange efficiency and enhancing the performance stability of the battery device.

[0056] In one embodiment, the thermal management component is formed from one or more of metals and non-metals.

[0057] In this embodiment, the material selection for the thermal management components is more flexible and varied, and they can be flexibly combined and prepared according to the heat exchange requirements of the battery device, so that the thermal management components can maintain efficient heat conduction capabilities and improve the overall performance of the battery thermal management system.

[0058] Secondly, this application provides a thermal management component, which has a heat exchange channel inside. The heat exchange channel includes a plurality of heat exchange sub-channels arranged in parallel. Each heat exchange sub-channel includes an upstream channel and a downstream channel that are connected. The upstream channel in some heat exchange sub-channels is adjacent to and thermally connected to the downstream channel in an adjacent heat exchange sub-channel; and / or, the downstream channel in some heat exchange sub-channels is adjacent to and thermally connected to the upstream channel in an adjacent heat exchange sub-channel.

[0059] In one embodiment, a plurality of heat exchange sub-channels are arranged sequentially along a first direction, and the upstream and downstream channels of the heat exchange sub-channels are both extended along a second direction, which is perpendicular to the first direction.

[0060] In this embodiment, extending the upstream and downstream flow channels in the second direction and setting them adjacent to each other is beneficial to increasing the length of the adjacent area between the upstream and downstream flow channels, which in turn increases the area of ​​adjacent heat exchange and improves the efficiency of heat exchange.

[0061] In one embodiment, the heat exchange channel further includes a loop guide channel, and each downstream channel is configured to communicate with the loop guide channel at the end away from the upstream channel; an edge region is formed on the surface of the thermal management component near the edge, and the loop guide channel is configured corresponding to the edge region.

[0062] In this embodiment, the edge region of the thermal management component corresponds to the loop guide channel, which can correspond to the battery cell assembly in the edge region with a lower temperature, thereby improving the balanced heat dissipation of the battery cell assembly.

[0063] In one embodiment, the thermal management component has a flow channel group inside, the flow channel group including two heat exchange channels, the thermal management component has a symmetry plane, and the two heat exchange channels are symmetrically arranged on both sides of the symmetry plane.

[0064] In this embodiment, by designing two symmetrically arranged heat exchange channels, it is beneficial to improve the balanced heat dissipation of the battery cell assembly by the thermal management components.

[0065] Thirdly, this application provides an electrical device, including a battery device as described in any of the above, the battery device being used to store or provide electrical energy.

[0066] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0067] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments of this application 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.

[0068] Figure 1 is a structural schematic diagram of a vehicle provided in some embodiments of this application;

[0069] Figure 2 is an exploded structural diagram of a battery device provided in some embodiments of this application;

[0070] Figure 3 is a schematic diagram of the exploded structure of a battery device provided in some embodiments of this application;

[0071] Figure 4 is an exploded structural diagram of the thermal management component in a battery device provided in some embodiments of this application;

[0072] Figure 5 shows the relative positional relationship between the heat exchange channel and the battery cell assembly in some embodiments of this application.

[0073] Figure 6 shows the relative positional relationship between the heat exchange channel and the battery cell assembly in some embodiments of this application.

[0074] Figure 7 is a schematic diagram of the heat exchange channel on the thermal management component of a battery device provided in some embodiments of this application;

[0075] Figure 8 is a schematic diagram of the heat exchange channel on the thermal management component in a battery device provided in some embodiments of this application.

[0076] Figure 9 is a schematic diagram of the heat exchange channel on the thermal management component in a battery device provided in some embodiments of this application.

[0077] Figure 10 is a magnified view of a portion of position A in Figure 9;

[0078] Figure 11 is a partial enlarged view of position B in Figure 8;

[0079] Figure 12 is a magnified view of a portion of position C in Figure 9;

[0080] Figure 13 is a magnified view of a portion of position D in Figure 9;

[0081] Figure 14 is a partial enlarged view of position E in Figure 9;

[0082] Figure 15 is a partial enlarged view of position F in Figure 9;

[0083] Figure 16 is a schematic diagram of the temperature distribution of the heat exchange channel of the thermal management component in a battery device provided in some embodiments of this application.

[0084] Explanation of reference numerals in the attached drawings: 1000, Vehicle; 1100, Battery unit; 1110, Battery cell assembly; 1111, Battery cell module; 1112, Battery cell; 1120, Housing assembly; 1121, First part; 1122, Second part; 11221, Frame; 11222, Bottom of the housing; 1130, Housing body; 1131, Cover; 1132, Housing frame; 1133, Receiving cavity; 1140, Thermal management component; 1141, First sub-component; 1142, Second sub-component; 1143, Heat exchange surface; 1144, Heat exchange channel; 11441, Heat exchange sub-channel; 11442, Upstream channel; 114421, Sub-inlet ; 11443, Downstream Flow Channel; 114431, Sub-outlet; 11444, Inlet Flow Channel; 11445, Outlet Flow Channel; 11446, First Branch Flow Channel; 11447, Second Branch Flow Channel; 11448, Loop Guide Flow Channel; 11449, Guide Sub-Flow Channel; 1145, Symmetry Plane; 1150, Connector Component; 1200, Controller; 1300, Motor; A, Edge Region; B, First Temperature Equalization Region; C, Second Region; D, First Region; E, Branch Flow Region; F, Second Temperature Equalization Region; X, First Direction; Y, Second Direction; L1, First Spacing Distance; L2, Second Spacing Distance; L3, Third Spacing Distance. Detailed Implementation

[0085] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application, and are therefore merely examples and should not be used to limit the scope of protection of this application.

[0086] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0087] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0088] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0089] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0090] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0091] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0092] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0093] In recent years, new energy vehicles have experienced rapid development, and their market share is increasing. The urgent problem to be solved in the new energy vehicle industry is to quickly and efficiently achieve energy replenishment.

[0094] During the charging and discharging process, the battery devices in new energy vehicles release a lot of heat. The battery devices are usually equipped with heat exchange components that can exchange heat between individual battery cells to cool down the individual battery cells.

[0095] Fast charging is a mainstream solution for rapidly replenishing energy in new energy vehicles. However, its implementation faces numerous challenges. During fast charging, the electrode components generate a significant amount of heat, which can easily cause a rapid rise in the internal temperature of the battery pack. In fast charging, uneven heat exchange between the heat exchange components and individual battery cells is more likely to occur, leading to a sharp increase in the temperature of some individual battery cells and the accumulation of large amounts of heat inside the battery pack. This negatively impacts the battery's performance and lifespan, and may even pose significant safety hazards during use. Therefore, ensuring balanced heat dissipation, rapid heat exchange, and improving the consistency of temperature distribution within the battery pack have become bottlenecks in battery thermal management.

[0096] Specifically, battery devices generate heat during charging and discharging. If this heat cannot be effectively dissipated, it may lead to a decline in battery performance and a shortened lifespan. High temperatures can accelerate internal chemical reactions within the battery, increase internal resistance, reduce energy density, and in severe cases, may cause thermal runaway. Therefore, heat exchange components are incorporated into battery devices to cool the individual battery cells.

[0097] Regarding the issue of uneven temperature distribution and localized high temperatures within the battery device, research has revealed that large overheated areas exist on the heat exchange components inside the battery device. These overheated areas have low heat exchange capacity, and their presence reduces the heat exchange efficiency and capacity of individual battery cells. This causes a sharp rise in the temperature of the corresponding battery cell, resulting in uneven temperature distribution across the entire battery cell and affecting the normal operation of the battery device. Furthermore, the overheated areas also prevent heat from dissipating in a timely manner, leading to an increase in the internal temperature of the battery device, thereby affecting the performance and lifespan of both the individual battery cells and the entire battery device.

[0098] Further analysis reveals that the thermal management component contains heat exchange channels. The inlet channels (corresponding to the upstream channels in this application) and the loop channels (corresponding to the downstream channels in this application) are centrally located. After entering the inlet channels for heat exchange, the heat exchange medium (e.g., heat exchange refrigerant) changes from a liquid to a gaseous state. In the loop channels, the heat exchange refrigerant is essentially vaporized. The heat exchange capacity of the gaseous heat exchange refrigerant is relatively small, resulting in overheated areas on the thermal management component. These overheated areas reduce the heat exchange capacity of the battery cells. The centralized location of the loop channels leads to the formation of large overheated areas, which are areas with weak heat exchange capacity. Excessively large overheated areas affect the overall heat exchange effect on the battery cells, causing a sharp rise in the temperature of the battery cells corresponding to the overheated areas. This results in uneven temperature distribution on the battery cells, heat accumulation, and consequently affects the performance and lifespan of the battery cells and the battery device.

[0099] Therefore, this application provides a battery device that, based on the characteristic that the temperature of the region corresponding to the upstream flow channel on the thermal management component is high and the temperature of the region corresponding to the downstream flow channel on the thermal management component is low, by arranging multiple heat exchange sub-channels in the thermal management component in parallel, and further arranging the upstream and downstream flow channels in adjacent heat exchange sub-channels adjacent to each other and conducting heat together, the downstream flow channel will exchange and conduct heat with the upstream flow channel, thereby balancing the temperature between the regions on the thermal management component corresponding to the upstream and downstream flow channels respectively. The region on the thermal management component corresponding to the downstream flow channel is less likely to form an overheated area, thus reducing the area of ​​the overheated area on the thermal management component, making the temperature distribution on the thermal management component more uniform, which is beneficial to improving the ability of the thermal management component to evenly exchange heat with the battery cells, and improving the temperature uniformity of the battery cells. In addition, the reduction of the overheated area is beneficial to improving the overall heat exchange capacity of the thermal management component, thereby improving the heat exchange effect on the battery cells. The heat inside the battery device can be dissipated in a timely manner, making the overall temperature of the battery cells more stable, which is beneficial to improving the performance and service life of the battery cells and the battery device.

[0100] Specifically, referring to FIG2, this application embodiment provides a battery apparatus 1100, which may include one or more battery cell assemblies 1110 for providing voltage and capacity. Each battery cell assembly may include multiple battery cells 1112, which are connected in series, parallel, or mixed connections via a busbar. The battery apparatus 1100 may also be a battery pack, which generally includes a housing assembly and one or more battery cell assemblies 1110, with the battery cell assemblies 1110 housed within the housing assembly.

[0101] The battery device 1100 disclosed in this application can be used in electrical devices that use the battery device 1100 as a power source or in various energy storage devices and systems that use the battery device 1100 as an energy storage element. Electrical devices can be, but are not limited to, mobile phones, portable devices, laptops, electric toys, power tools, electric vehicles, vehicles, ships, spacecraft, etc. Electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric boat toys, and electric airplane toys, etc. Spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0102] For ease of explanation, the following embodiments will be described using a vehicle 1000 as an example of an electrical device according to an embodiment of this application.

[0103] Please refer to Figure 1, which is a structural schematic diagram of a vehicle 1000 provided in some embodiments of this application. The vehicle 1000 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. A battery device 1100 is provided inside the vehicle 1000, and the battery device 1100 can be located at the bottom, front, or rear of the vehicle 1000. The battery device 1100 can be used to power the vehicle 1000; for example, the battery device 1100 can serve as the operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 1200 and a motor 1300. The controller 1200 is used to control the battery device 1100 to supply power to the motor 1300, for example, to meet the power needs of the vehicle 1000 during startup, navigation, and driving.

[0104] In some embodiments of this application, the battery device 1100 can not only serve as the operating power source for the vehicle 1000, but also as the driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0105] Please refer to Figure 2, which is an exploded view of a battery device 1100 provided in some embodiments of this application. In one embodiment, the battery device 1100 includes a housing assembly 1120 and a battery cell assembly 1110. A receiving cavity 1133 is formed within the housing assembly 1120, and the battery cell assembly 1110 is housed within the receiving cavity 1133. The battery cell assembly 1110 is typically formed by arranging multiple battery cells 1112. Alternatively, the battery cell assembly 1110 can also be a battery module, which is formed by arranging and fixing multiple battery cells 1112 to form an independent module. The housing assembly 1120 provides the receiving cavity 1133 for the battery cell assembly 1110, and the housing assembly 1120 can adopt various structures.

[0106] A battery cell 1112 refers to the smallest unit that makes up the battery device 1100. Each battery cell 1112 can be a secondary battery cell or a primary battery cell; it can also be a lithium-sulfur battery cell, a sodium-ion battery cell, or a magnesium-ion battery cell, but is not limited to these. The battery cell 1112 can be cylindrical, flat, cuboid, or other shapes.

[0107] According to some embodiments of this application, referring to Figures 2-5, this application provides a battery device 1100, which includes a housing assembly 1120, a battery cell assembly 1110, and a thermal management component 1140; wherein, the housing assembly has a receiving cavity 1133 inside; the battery cell assembly 1110 is disposed in the receiving cavity 1133; a refrigerant flows inside the thermal management component 1140; the thermal management component 1140 is configured to exchange heat with the battery cell assembly 1110; and the thermal management component 1140 has a heat exchange channel 11 inside. 44. The heat exchange channel 1144 includes a plurality of heat exchange sub-channels 11441 arranged in parallel. Each heat exchange sub-channel 11441 includes an upstream channel 11442 and a downstream channel 11443 that are connected. The upstream channel 11442 in some heat exchange sub-channels 11441 is adjacent to and thermally compatible with the downstream channel 11443 in the adjacent heat exchange sub-channel 11441; and / or, the downstream channel 11443 in some heat exchange sub-channels 11441 is adjacent to and thermally compatible with the upstream channel 11442 in the adjacent heat exchange sub-channel 11441.

[0108] Specifically, for the housing assembly 1120, the housing assembly 1120 is used to house the battery cell assembly 1110. The housing assembly 1120 has a receiving cavity 1133, which can be a closed cavity or an open cavity. When the receiving cavity 1133 is a closed cavity, the thermal management component 1140 can be housed within the receiving cavity 1133. When the receiving cavity 1133 is an open cavity, the thermal management component 1140 can be connected to the open side of the housing assembly 1120. The thermal management component 1140 and the housing assembly 1120 together define a closed cavity. The housing assembly 1120 can have various shapes, such as a cylinder, a cuboid, etc.

[0109] The battery cell assembly 1110 includes one or more battery cells 1112. The thermal management component 1140 needs to exchange heat with the battery cell assembly 1110. Generally, the thermal management component 1140 needs to be located close to the battery cell assembly 1110, or the thermal management component 1140 needs to directly contact or abut against the battery cell assembly 1110 to improve the heat exchange effect. When the thermal management component 1140 exchanges heat with the battery cell assembly 1110, a large heat exchange area needs to be formed between the thermal management component 1140 and the battery cell assembly 1110 to improve the heat exchange effect. Therefore, a heat exchange surface 1143 that is close to or in contact with the surface of the battery cell 1112 is formed on the thermal management component 1140.

[0110] The surface of the battery cell 1112 that is close to or in contact with the heat exchange surface 1143 can be the bottom surface or the side surface of the battery cell 1112. Taking the battery device 1100 as a horizontally placed example, the surface below the battery cell 1112 is the bottom surface, and the surface of the battery cell 1112 along the vertical direction is the side surface. Therefore, in this embodiment, the heat exchange surface 1143 of the thermal management component 1140 can be in contact with or close to the bottom surface or the side surface of the battery cell 1112. That is to say, the thermal management component 1140 can be located at the bottom of the battery cell assembly 1110 or at the side of the battery cell assembly 1110. The thermal management component 1140 located at the bottom of the battery cell assembly 1110 can also be called a heat exchange base plate or a cooling base plate.

[0111] For ease of explanation, the following embodiments will be described using an example of a battery device 1100 of this application that is placed horizontally, with the thermal management component 1140 located at the bottom of the battery cell assembly 1110.

[0112] In this battery device 1100, the thermal management component 1140 can adopt a direct cooling heat exchange method, and the heat exchange medium can be a heat exchange refrigerant (hereinafter referred to as refrigerant). Therefore, the flow channel opened inside the thermal management component 1140 is defined as the heat exchange flow channel 1144. For the heat exchange flow channel 1144 inside the thermal management component 1140, as shown in FIG4, the heat exchange flow channel 1144 can be a hole structure inside the thermal management component 1140. For example, the thermal management component 1140 is plate-shaped, and a through hole structure or cavity structure with a certain extension length and extension path is opened in the plate of the thermal management component 1140. This through hole structure or cavity structure forms the heat exchange flow channel 1144.

[0113] The thermal management component 1140 can be integrally molded, and the heat exchange channel 1144 can be prepared by gas-assisted or water-assisted molding; or, the thermal management component 1140 can also be assembled. For example, the thermal management component 1140 includes a first sub-component 1141 and a second sub-component 1142. A groove structure with a preset extension length and extension shape is formed on the second sub-component 1142. The groove structure can be prepared by stamping. The first sub-component 1141 and the second sub-component 1142 are fixedly or detachably connected, and the groove opening of the groove structure is closed to form a through-hole structure or a cavity structure, which is to form the heat exchange channel 1144.

[0114] For example, the first sub-component 1141 can be an upper plate, and the second sub-component 1142 can be a lower plate. The heat exchange channel 1144 is formed on the lower plate by stamping. The first sub-component 1141 and the second sub-component 1142 can be welded together by brazing, and the welded area can play a role in heat transfer.

[0115] For example, the thermal management component 1140 is formed using a bent tube. The bent tube extends and bends in a plane parallel to the heat exchange surface 1143. Thus, the cavity of the bent tube forms the heat exchange channel 1144, and the surface of the bent tube facing the battery cell assembly 1110 forms the heat exchange surface 1143. Thermally conductive adhesive is applied between adjacent tubes in the bent tube, so heat transfer can be achieved between the upstream channel 11442 and the downstream channel 11443 through the thermally conductive adhesive.

[0116] Referring to Figures 5 and 7, the heat exchange channel 1144 includes multiple heat exchange sub-channels 11441, each of which forms a heat exchange loop. That is, each heat exchange sub-channel 11441 has a heat exchange inlet and a heat exchange outlet. In each heat exchange sub-channel 11441, the upstream channel 11442 is connected to the downstream channel 11443. The end of the upstream channel 11442 away from the downstream channel 11443 forms the heat exchange inlet, and the end of the downstream channel 11443 away from the upstream channel 11442 forms the heat exchange outlet. Thus, the heat exchange medium enters the upstream channel 11442 from the heat exchange inlet, flows to the downstream channel 11443, and then flows out from the heat exchange outlet, forming a circulating heat exchange.

[0117] The heat exchange medium is a heat exchange refrigerant, which enables the thermal management component 1140 to adopt a direct cooling heat exchange method. The heat exchange process is as follows: after entering the upstream flow channel 11442 for heat exchange, the heat exchange medium changes from a liquid state to a gaseous state. The upstream flow channel 11442 has a large amount of liquid heat exchange refrigerant and a large phase change heat, resulting in a strong heat exchange capacity for the battery cell module 1110. The heat exchange refrigerant enters the downstream flow channel 11443 from the upstream flow channel 11442. In the downstream flow channel 11443, the heat exchange refrigerant is basically vaporized. The heat exchange capacity of the gaseous heat exchange refrigerant is relatively small, thereby reducing the heat exchange capacity for the battery cell module 1110.

[0118] Assuming that the downstream flow channel 11443 of the multiple heat exchange sub-flow channels 11441 are centrally arranged, the thermal management component 1140 will form a large overheated area on the heat exchange surface 1143 area corresponding to the downstream flow channel 11443. The overheated area refers to the area with weak heat exchange capacity. If the area of ​​the overheated area is too large, it will affect the overall heat exchange effect of the battery cell module 1110, causing the temperature of the battery cell module 1110 to rise, thereby affecting the performance and service life of the battery cell module 1110 and the battery device 1100.

[0119] Analyzing the aforementioned overheating problem, since the heat exchanger in the upstream flow channel 11442 has a strong heat exchange capacity, the temperature of the area on the heat exchange surface 1143 corresponding to the upstream flow channel 11442 is low. Conversely, the heat exchanger in the downstream flow channel 11443 has a relatively weak heat exchange capacity, resulting in a higher temperature on the area on the heat exchange surface 1143 corresponding to the downstream flow channel 11443. Therefore, to reduce the area of ​​the overheated region, multiple heat exchange sub-channels 11441 in the heat exchange channel 1144 are arranged side-by-side. Furthermore, the upstream flow channel 11442 in some of the heat exchange sub-channels 11441 is adjacent to and thermally compatible with the downstream flow channel 11443 in the adjacent heat exchange sub-channels 11441, and the downstream flow channel 11443 in some of the heat exchange sub-channels 11441 is adjacent to and thermally compatible with the adjacent heat exchange sub-channels. In 11441, the upstream flow channels 11442 are adjacent and thermally coordinated. That is, the upstream flow channel 11442 and the downstream flow channel 11443 in two adjacent heat exchange sub-flow channels 11441 are configured adjacently. Adjacent means that the upstream flow channel 11442 and the downstream flow channel 11443 are directly connected in space (without gap) or have only a very small gap. Thermally coordinated means that the adjacent upstream flow channel 11442 and the downstream flow channel 11443 can conduct heat (or exchange heat). It can also be understood that, due to the adjacent configuration of the upstream flow channel 11442 and the downstream flow channel 11443, the area on the heat exchange surface 1143 corresponding to the upstream flow channel 11442 and the area on the heat exchange surface 1143 corresponding to the downstream flow channel 11443 can conduct heat (or exchange heat).

[0120] It can be seen that the thermal conductivity between the upstream flow channel 11442 and the downstream flow channel 11443 is such that the low temperature of the upstream flow channel 11442 balances the high temperature of the downstream flow channel 11443. In other words, the low temperature region on the heat exchange surface 1143 corresponding to the upstream flow channel 11442 balances the high temperature region on the heat exchange surface 1143 corresponding to the downstream flow channel 11443. This reduces the temperature difference on the heat exchange surface 1143 of the thermal management component 1140. Therefore, it can be seen that the temperature of the region of the heat exchange surface 1143 corresponding to the downstream flow channel 11443 adjacent to the upstream flow channel 11442 is not prone to excessive increase and the temperature is relatively reduced, thus making it less likely to form an overheated zone and making the temperature distribution on the heat exchange surface 1143 more balanced. Then, the upstream channel 11442 and the downstream channel 11443 in the two adjacent heat exchange sub-channels 11441 form a first uniform temperature region B on the heat exchange surface 1143. As shown in Figure 11, the temperature distribution of the first uniform temperature region B is more balanced.

[0121] It should be noted that the upstream flow channel 11442 and the downstream flow channel 11443 of the multiple heat exchange sub-flow channels 11441 are opposite to the heat exchange surface 1143. The heat exchange medium in the upstream flow channel 11442 and the downstream flow channel 11443 will exchange heat with the heat exchange surface 1143, and the heat exchange surface 1143 will then exchange heat with the battery cell module 1110.

[0122] The battery cell assembly 1110 can directly contact the heat exchange surface 1143 of the thermal management component 1140 for heat exchange, or the battery cell assembly 1110 and the heat exchange surface 1143 can be spaced apart and arranged close to the heat exchange surface 1143, so that the thermal management component 1140 can exchange heat with the battery cell assembly 1110 through the heat exchange surface 1143, thereby achieving the purpose of cooling the battery cell assembly 1110.

[0123] Combining the temperature distribution diagram of the heat exchange channel in Figure 16, it can be clearly seen that the temperature of the downstream channel 11443, which is adjacent to the upstream channel 11442, is obviously balanced. In Figure 16, the darker the red, the higher the temperature, and the darker the green, the lower the temperature. The size of the numbers reflects the temperature.

[0124] In this embodiment, the upstream flow channel 11442 and the downstream flow channel 11443 in two adjacent heat exchange sub-flow channels 11441 are arranged adjacently. The low temperature of the upstream flow channel 11442 can balance the high temperature of the downstream flow channel 11443, thereby reducing the temperature of the area on the heat exchange surface 1143 corresponding to the downstream flow channel 11443. This makes it less likely for an overheated area to form, thus reducing the area of ​​the overheated area. This is beneficial to improving the heat exchange effect on the battery cell module 1110 and making the temperature distribution on the heat exchange surface 1143 of the thermal management component 1140 more uniform, thereby improving the heat exchange uniformity of the battery cell module 1110.

[0125] In some embodiments, as shown in Figures 6 and 7, a portion of the heat exchange sub-channel 11441 includes a first heat exchange sub-channel and a second heat exchange sub-channel; the second heat exchange sub-channel is located on one side of the first heat exchange sub-channel and is disposed adjacent to the first heat exchange sub-channel, and the downstream channel 11443 in the first heat exchange sub-channel is adjacent to and thermally connected to the upstream channel 11442 in the second heat exchange sub-channel 11441.

[0126] Specifically, among the multiple heat exchange sub-channels 11441, the first heat exchange sub-channel and the second heat exchange sub-channel are any two of them, wherein the first heat exchange sub-channel and the second heat exchange sub-channel each include an upstream channel 11442 and a downstream channel 11443 that are connected to each other.

[0127] The relative positional relationship between the first heat exchanger sub-channel and the second heat exchanger sub-channel is as follows: the second heat exchanger sub-channel is located on one side of the first heat exchanger sub-channel and is arranged adjacent to the first heat exchanger sub-channel. For example, if the upstream channel 11442 and the downstream channel 11443 in the first heat exchanger sub-channel and the second heat exchanger sub-channel both extend along the second direction Y, then the first heat exchanger sub-channel and the second heat exchanger sub-channel are arranged adjacent to each other in the first direction X, so that the downstream channel 11443 in the first heat exchanger sub-channel and the upstream channel 11442 in the second heat exchanger sub-channel 11441 are adjacent and thermally compatible.

[0128] In this embodiment, the downstream flow channel 11443 in the first heat exchange sub-channel and the upstream flow channel 11442 in the second heat exchange sub-channel 11441 are arranged adjacent to each other and thermally coordinated, so that the low temperature of the upstream flow channel 11442 can balance the high temperature of the downstream flow channel 11443, thereby reducing the temperature of the area on the heat exchange surface 1143 corresponding to the downstream flow channel 11443, thus making it less likely to form an overheated zone.

[0129] In some embodiments, referring to Figures 6 and 7, a portion of the heat exchange sub-channel 11441 includes a first heat exchange sub-channel, a second heat exchange sub-channel, and a third heat exchange sub-channel. The second heat exchange sub-channel and the third heat exchange sub-channel are located on both sides of the first heat exchange sub-channel and are arranged adjacent to the first heat exchange sub-channel. The downstream channel 11443 in the first heat exchange sub-channel is adjacent to and thermally connected to the upstream channel 11442 in the second heat exchange sub-channel 11441. Furthermore, the upstream channel 11443 in the first heat exchange sub-channel is adjacent to and thermally connected to the downstream channel 11442 in the third heat exchange sub-channel 11441.

[0130] Specifically, among the multiple heat exchange sub-channels 11441, the first heat exchange sub-channel, the second heat exchange sub-channel, and the third heat exchange sub-channel are any three of them, wherein the first heat exchange sub-channel, the second heat exchange sub-channel, and the third heat exchange sub-channel each include an upstream channel 11442 and a downstream channel 11443 that are connected to each other.

[0131] The relative positions of the first, second, and third heat exchanger channels are as follows: the first heat exchanger channel is located between the second and third heat exchanger channels, and its two sides are adjacent to the second and third heat exchanger channels, respectively. For example, if the upstream channel 11442 and downstream channel 11443 of the first, second, and third heat exchanger channels both extend along the second direction Y, then the second heat exchanger channel... The first heat exchange sub-channel and the third heat exchange sub-channel are arranged sequentially in the first direction X. The first heat exchange sub-channel is located between the second heat exchange sub-channel and the third heat exchange sub-channel, such that the downstream channel 11443 in the first heat exchange sub-channel is adjacent to and thermally compatible with the upstream channel 11442 in the second heat exchange sub-channel 11441; and the upstream channel (11443) in the first heat exchange sub-channel is adjacent to and thermally compatible with the downstream channel 11442 in the third heat exchange sub-channel 11441.

[0132] In this embodiment, the upstream flow channel 11443 and the downstream flow channel 11443 in the first heat exchange sub-channel are respectively configured adjacent to the downstream flow channel 11442 in the third heat exchange sub-channel 11441 and the upstream flow channel 11442 in the second heat exchange sub-channel 11441 on both sides, and are thermally coordinated. This allows the low temperature of the upstream flow channel 11442 to balance the high temperature of the downstream flow channel 11443, thereby reducing the temperature of the area on the heat exchange surface 1143 corresponding to the downstream flow channel 11443, making it less likely to form an overheated area, and improving the heat exchange uniformity of the battery cell module 1110.

[0133] In some embodiments, as shown in Figures 5 and 6, a plurality of heat exchange sub-channels 11441 are arranged sequentially along a first direction, and the upstream channel 11442 and the downstream channel 11443 in the heat exchange sub-channels 11441 are both extended along a second direction, the second direction Y being perpendicular to the first direction X.

[0134] It should be noted that the first direction X can be any direction parallel to the heat exchange surface 1143. For example, the first direction X is the width direction (or length direction) of the heat exchange surface 1143, and correspondingly, the second direction Y is the length direction (or width direction) of the heat exchange surface 1143.

[0135] Specifically, the first direction X is parallel to the heat exchange surface 1143. Taking the heat management component 1140 as a plate as an example, the heat exchange surface 1143 can be formed on one side of the plate of the heat management component 1140. When the first direction X is the width direction of the plate, the second direction Y is the length direction of the plate. The upstream flow channel 11442 and the downstream flow channel 11443 are both extended along the second direction Y. It can be seen that the upstream flow channel 11442 and the downstream flow channel 11443 are parallel and spaced apart. The extension direction of the upstream flow channel 11442 and the downstream flow channel 11443 is along the length direction of the plate. A heat exchange sub-flow channel 11441 may include multiple upstream flow channels 11442 and multiple downstream flow channels 11443. Along the second direction Y, the upstream flow channel 11442 and the downstream flow channel 11443 are connected at one end.

[0136] In this embodiment, the upstream flow channel 11442 and the downstream flow channel 11443 are extended in the second direction Y and arranged adjacent to each other. This is beneficial to increasing the length of the adjacent area between the upstream flow channel 11442 and the downstream flow channel 11443, which is beneficial to increasing the area of ​​adjacent heat exchange and increasing the efficiency of heat exchange.

[0137] In some embodiments, as shown in FIG6 and FIG7, the heat exchange channel 1144 further includes at least one inlet channel 11444 and at least one outlet channel 11445, wherein the inlet channel 11444 is connected to a plurality of upstream channels 11442 and the outlet channel 11445 is connected to a plurality of downstream channels 11443.

[0138] Specifically, the inlet channel 11444 is the inlet for the heat exchange medium to enter the interior of the heat management component 1140. One or more inlet channels 11444 can be provided. One inlet channel 11444 can be connected to multiple upstream channels 11442. If the inlets of each upstream channel 11442 are called sub-inlets 114421, it can be seen that after the heat exchange medium enters the inlet channel 11444, it will form multiple branches and connect with multiple sub-inlets 114421. These multiple branches can be understood as multiple inlet branch channels.

[0139] Similarly, the outlet flow channel 11445 is the outlet through which the heat exchange medium flows to the outside of the heat management component 1140. One or more outlet flow channels 11445 can be provided. One outlet flow channel 11445 can be connected to multiple downstream flow channels 11443. If the outlet of each downstream flow channel 11443 is called a sub-outlet 114431, then it can be known that after the heat exchange medium flows out of the sub-outlet 114431, it will be connected to the outlet flow channel 11445 through multiple branches.

[0140] In this embodiment, one inlet channel 11444 can be connected to multiple upstream channels 11442, and one outlet channel 11445 can be connected to multiple downstream channels 11443. This is beneficial to increase the number of upstream channels 11442 and downstream channels 11443, and to make reasonable planning and layout, thereby improving the uniformity of the layout and improving the temperature uniformity of the heat exchange surface 1143 (i.e., the thermal management component 1140).

[0141] In some embodiments, as shown in Figures 7, 8 and 14, the heat exchange channel 1144 further includes a first branch channel 11446 and a plurality of second branch channels 11447, each of which is connected to the first branch channel 11446. The first branch channel 11446 extends along a first direction X and is connected to the inlet channel 11444. Each of the second branch channels 11447 extends along a second direction Y and is distributed and connected to each of the upstream channels 11442.

[0142] Specifically, the first branch channel 11446 and the second branch channel 11447 are the connecting channels between the inlet channel 11444 and each of the upstream channels 11442, respectively. The heat exchange medium first passes through the first branch channel 11446, and then enters each of the second branch channels 11447, from which it enters the corresponding upstream channel 11442. The first branch channel 11446 and the second branch channel 11447 form a branching region E on the heat exchange surface 1143.

[0143] One or more first diversion channels 11446 can be provided. Each first diversion channel 11446 is connected to multiple second diversion channels 11447. The first diversion channel 11446 extends along the first direction X. The direction of the extension length of the first diversion channel 11446 is the same as the arrangement direction of each heat exchange sub-channel 11441, so that the heat exchange medium flows more smoothly in the first diversion channel 11446 and helps to reduce the flow path of the heat exchange medium from the inlet channel 11444 to the second diversion channel 11447 and the upstream channel 11442, which helps to reduce heat exchange losses.

[0144] Each of the second branch channels 11447 extends along the second direction Y, meaning that each of the second branch channels 11447 is parallel to and spaced apart from each other. Each of the second branch channels 11447 is perpendicularly connected to the first branch channel 11446. Each of the downstream channels 11443 also extends along the second direction Y, so that each of the second branch channels 11447 and each of the downstream channels 11443 are opposite to each other. This allows the heat exchange medium to flow more smoothly from each of the second branch channels 11447 into each of the downstream channels 11443, and helps to shorten the flow path of the heat exchange medium into the downstream channels 11443, thereby reducing heat loss.

[0145] The first and second branch channels 11446 and 11447 can also be understood as part of the inlet channel 11444. The heat exchange medium (i.e., heat exchange refrigerant) enters the interior of the thermal management component 1140. The purpose is to reduce the temperature difference problem of the thermal management component 1140 caused by uneven flow distribution. The flow distribution of the heat exchange medium is easily affected by the dryness of the heat exchange medium. The greater the dryness, the more difficult the flow distribution. The dryness of the heat exchange medium is the smallest when it enters the thermal management component 1140. Therefore, the heat exchange medium is least affected when the flow is distributed in this area. This area is generally divided into multiple second branch channels 11447. The purpose is to set multiple upstream channels 11442 to reduce the impact of poor heat exchange capacity of a certain heat exchange sub-channel 11441 on the temperature uniformity of the cold plate. Moreover, the upstream channel 11442 and the downstream channel 11443 in any two adjacent heat exchange sub-channels 11441 can be balanced with each other to further improve the temperature uniformity performance of the thermal management component 1140. The effective length of the multiple heat exchange sub-channels 11441 should be kept consistent to reduce the uneven flow caused by the difference in flow resistance in each first sub-channel 11446 and second sub-channel 11447, thereby further reducing the temperature difference of the heat exchange surface 1143 and improving the temperature uniformity performance of the thermal management component 1140.

[0146] In this embodiment, the first branch channel 11446 and the second branch channel 11447 are connecting channels between the inlet channel 11444 and the downstream channel 11443. The first branch channel 11446 is arranged to extend along the first direction X so as to be consistent with the arrangement direction of each heat exchange sub-channel 11441, which is beneficial to improve the smoothness of heat exchange medium flow. Each second branch channel 11447 is perpendicular to the first branch channel 11446 and is opposite to each downstream channel 11443, which improves the smoothness of heat exchange medium flow, helps to reduce the flow path of heat exchange medium, and reduces heat exchange loss.

[0147] In some embodiments, as shown in Figures 8, 9 and 15, the inlet channel 11444 and the outlet channel 11445 are arranged adjacent to each other.

[0148] Specifically, the inlet channel 11444 and the outlet channel 11445 are adjacent, which makes the temperature of the inlet channel 11444 and the outlet channel 11445 more balanced. That is, the two adjacent inlet channels 11444 and the outlet channel 11445 form a second uniform temperature region F on the heat exchange surface 1143. The temperature distribution of the second uniform temperature region F is more balanced. For example, if the flow resistance of the heat exchange medium is large, the high temperature heat exchange medium in the inlet channel 11444 can heat the low temperature heat exchange medium in the outlet channel 11445, thereby requesting a larger heat exchange medium flow rate from the external delivery system to further reduce the temperature difference on the thermal management component 1140 (specifically the heat exchange surface 1143).

[0149] In this embodiment, the adjacent arrangement of the inlet channel 11444 and the outlet channel 11445 is conducive to achieving temperature balance, increasing the flow rate of the heat exchange refrigerant, and thus balancing the temperature difference of the heat exchange surface 1143.

[0150] In some embodiments, as shown in FIG7, the two ends of the heat exchange channel 1144 are respectively configured as downstream channels 11443 along the first direction X.

[0151] Specifically, along the first direction X, the heat exchange channel 1144 has two end positions, which can be understood as the beginning and end of the heat exchange channel 1144, respectively. The heat exchange channel 1144 has multiple heat exchange sub-channels 11441 arranged along the first direction X. Therefore, it can be seen that each end position includes two heat exchange sub-channels 11441, namely the heat exchange sub-channel 11441 located at the beginning end and the heat exchange sub-channel 11441 located at the end end.

[0152] The two ends of the heat exchange channel 1144 are respectively configured as downstream channels 11443. The downstream channel 11443 in the heat exchange sub-channel 11441 at the first end is located on the side away from the adjacent heat exchange sub-channel 11441; the downstream channel 11443 in the heat exchange sub-channel 11441 at the tail end is located on the side away from the adjacent heat exchange sub-channel 11441. That is, along the first direction X, they are downstream channel 11443, upstream channel 11442, downstream channel 11443, ... upstream channel 11442, downstream channel 11443, so that the two downstream channels 11443 are located at two positions near the edge of the heat exchange surface 1143.

[0153] In this embodiment, since the heat exchange capacity of the downstream flow channel 11443 is relatively low, the temperature of the corresponding heat exchange surface 1143 region is relatively high. The temperature of the battery cell assembly 1110 at the edge position is lower than that of the battery cell assembly 1110 in the middle region. The relatively high temperature of the heat exchange surface 1143 region is matched with the relatively low temperature of the battery cell assembly 1110, so that the two ends of the first direction X are matched with the downstream flow channel 11443, achieving temperature coordination and matching, which is more conducive to achieving balanced heat dissipation of the battery cell assembly 1110.

[0154] In some embodiments, referring to Figures 7 and 8, along the first direction X, the inlet channel 11444 and the outlet channel 11445 are located on the same side; the heat exchange channel 1144 further includes a loop guide channel 11448, each downstream channel 11443 has a sub-outlet 114431 on the side away from the inlet channel 11444, and the outlet channel 11445 is connected to each sub-outlet 114431 through the loop guide channel 11448; along the first direction X, the loop guide channel 11448 is located at one end or both ends of the heat exchange channel 11444.

[0155] Specifically, along the first direction X, the inlet channel 11444 and the outlet channel 11445 are located on the same side. For example, if there is an extension axis along the first direction X, then the inlet channel 11444 and the outlet channel 11445 are both located on one side of the extension axis, and the inlet channel 11444 and the outlet channel 11445 can be configured adjacent to each other.

[0156] The loop guide channel 11448 is a connecting channel connecting the sub-outlets 114431 and the outlet channel 11445 of each downstream channel 11443. One or two loop guide channels 11448 can be provided, and each loop guide channel 11448 may include multiple parallel guide sub-channels 11449. For example, two loop guide channels 11448 are provided, and the two loop guide channels 11448 can be located at the two ends of the heat exchange channel 1144 along the first direction X, that is, the loop guide channels 11448 are arranged at the beginning and end of the heat exchange channel 1144.

[0157] Each downstream flow channel 11443 has a sub-outlet 114431, which is located on the side of the downstream flow channel 11443 away from the inlet flow channel 11444. That is, along the second direction Y, the heat exchange medium flows in from one end and flows out from the other end, and then enters the loop guide flow channel 11448, so that the fluid flows from the edge of the heat exchange surface 1143 along the first direction X into the outlet flow channel 11445.

[0158] It can be seen that in this layout, the heat exchange capacity of the heat exchange medium in the two loop guide channels 11448 is relatively lower. Therefore, the temperature of the area corresponding to the heat exchange surface 1143 of the loop guide channel 11448 is higher than that of the other upstream channels 11442 and downstream channels 11443. Thus, the area of ​​the heat exchange surface 1143 corresponding to the loop guide channel 11448 can be relatively reduced to help reduce the area of ​​the overheated region. Referring to the temperature distribution diagram of the heat exchange channels in Figure 16, it can be clearly seen that the temperature of the downstream channel 11443 adjacent to the upstream channel 11442 is significantly balanced. Furthermore, the temperature of the overheated region (i.e., edge region A) corresponding to the loop guide channel 11448 is also relatively balanced, making overheating less likely.

[0159] In this embodiment, by setting a loop guide channel 11448 and placing the loop guide channel 11448 at one or both ends of the heat exchange surface 1143 along the first direction X, that is, placing the loop guide channel 11448 at the edge of the heat exchange surface 1143, the loop guide channel 11448 corresponds to the battery cell assembly 1110 located at the edge with a relatively lower temperature, thereby reducing the impact of the overheated area on the battery cell assembly 1110 and facilitating balanced heat exchange of the battery cell assembly 1110.

[0160] In some embodiments, as shown in FIG5 and FIG7-9, the loop guide channel 11448 includes a plurality of guide sub-channels 11449 extending and communicating along the second direction Y, and the plurality of guide sub-channels 11449 are connected between the outlet channel 11445 and each sub-outlet 114431.

[0161] Specifically, since the loop guide channel 11448 is used to collect the heat exchange medium in multiple downstream channels 11443, the loop guide channel 11448 includes multiple guide sub-channels 11449. The multiple guide sub-channels 11449 are connected between the outlet channel 11445 and each sub-outlet 114431, so as to improve the flow efficiency and reduce the accumulation and blockage of heat exchange medium.

[0162] Since both the upstream flow channel 11442 and the downstream flow channel 11443 extend along the second direction Y, in order to improve the space utilization of the thermal management component 1140, the guide sub-flow channels 11449 also extend along the second direction Y, making the flow channel distribution on the heat exchange surface 1143 of the thermal management component 1140 more uniform, which is conducive to improving balanced heat dissipation.

[0163] In this embodiment, by setting multiple guide channels 11449 extending along the second direction Y, the return flow of the heat exchange channel 1144 is made smoother, which is conducive to improving the space utilization rate within the thermal management component 1140 and making the layout of the heat exchange channel 1144 more reasonable.

[0164] In some embodiments, referring to FIG7, along the first direction X, two adjacent guide sub-channels 11449 have a first interval distance L1; each heat exchange sub-channel 11441 has multiple upstream channels 11442 arranged at intervals along the first direction X, and there is a second interval distance L2 between two adjacent upstream channels 11442; each heat exchange sub-channel 11441 has multiple downstream channels 11443 arranged at intervals along the first direction X, and there is a third interval distance L3 between two adjacent downstream channels 11443; the first interval distance L1 is smaller than the second interval distance L2 and the third interval distance L3.

[0165] Specifically, the first interval distance L1 should be understood as the distance between the two opposite flow channel walls of two adjacent guide sub-flow channels 11449 in the first direction X, that is, the distance generated by the interval portion between two adjacent guide sub-flow channels 11449 in the first direction X; similarly, the second interval distance L2 should be understood as the distance between the two opposite flow channel walls of two adjacent upstream flow channels 11442, that is, the distance generated by the interval portion between two adjacent upstream flow channels 11442 in the first direction X; similarly, the third interval distance L3 should be understood as the distance between the two opposite flow channel walls of two adjacent downstream flow channels 11443, that is, the distance generated by the interval portion between two adjacent downstream flow channels 11443 in the first direction X.

[0166] The first interval distance L1 is less than the second interval distance L2 and the third interval distance L3. Therefore, in the first direction X, the density of the guide sub-channels 11449 should be greater than the density of the downstream channel 11443 and greater than the density of the upstream channel 11442. This makes the area on the heat exchange surface 1143 corresponding to the multiple guide sub-channels 11449 as small as possible, so as to reduce the area of ​​the overheated area (i.e., the overheated region) on the heat exchange surface 1143.

[0167] In this embodiment, by making the spacing between the multiple guide channels 11449 smaller than the spacing between the downstream channel 11443 and the upstream channel 11442, it is beneficial to reduce the area of ​​the loop guide channel 11448 on the heat exchange surface 1143, and thus reduce the area of ​​the overheated zone.

[0168] In some embodiments, as shown in FIG6, FIG8-10 and FIG16, an edge region A is formed on the surface of the thermal management component 1140 near the edge, and a loop guide channel 11448 is configured corresponding to the edge region A.

[0169] Specifically, taking the heat management component 1140 as a flat plate as an example, the heat management component 1140 has two opposing surfaces, one of which forms a heat exchange surface 1143. Then, the edge region A should be understood as the region near the edge of the heat exchange surface 1143. Theoretically, there can be multiple edge regions A, but based on the structural layout of the heat exchange channel 1144, as shown in Figures 8 and 9, only one or two edge regions A near the edge at both ends along the first direction X are studied on the surface of the heat management component 1140 forming the heat exchange surface 1143. It can be considered that the surface of the heat management component 1140 forming the heat exchange surface 1143 has one edge region A or two edge regions A.

[0170] The loop guide channel 11448 is located inside the thermal management component 1140 and is disposed opposite to the surface of the heat exchange surface 1143 of the thermal management component 1140. The arrangement of the loop guide channel 11448 corresponds to the position of the edge region A. When there is one loop guide channel 11448, there is one edge region A, which is disposed corresponding to the loop guide channel 11448. When there are two loop guide channels 11448, there are two edge regions A, and the two loop guide channels 11448 are disposed corresponding to the two edge regions A respectively.

[0171] The temperature of the area on the surface of the thermal management component 1140 corresponding to the loop guide channel 11448 is high. It can be observed that the temperature of the battery cell assembly 1110 near the edge of the thermal management component 1140 and near the side wall of the housing assembly 1120 is lower than that of the battery cell assembly 1110 in the central region. Therefore, arranging the loop guide channel 11448 in this edge region A can help balance the heat exchange between the thermal management component 1140 and the battery cell assembly 1110. As shown in Figure 16, the temperature of the edge region A corresponding to the loop guide channel 11448 is also relatively balanced, and overheating is less likely to occur.

[0172] In this embodiment, the edge region A of the thermal management component 1140 is aligned with the loop guide channel 11448, which is able to correspond to the battery cell assembly 1110 with a lower temperature edge region A, thereby improving the balanced heat dissipation of the battery cell assembly 1110.

[0173] In some embodiments, as shown in FIG6, edge region A is provided to avoid battery cell assembly 1110.

[0174] Specifically, taking the horizontal placement of the battery device 1100 as an example, the area below edge region A is the loop guide channel 11448. Because the heat exchange capacity of the heat exchange medium within the loop guide channel 11448 decreases, the temperature of edge region A is prone to rise. If edge region A comes into contact with the battery cell assembly 1110, it will inevitably affect the heat exchange of that part of the battery cell assembly 1110, easily leading to a risk of a sharp temperature increase in the battery cell assembly 1110. Therefore, in this embodiment, the battery cell assembly 1110 is avoided from edge region A; that is, the battery cell assembly 1110 is not placed above edge region A, thereby minimizing direct contact between the battery cell 1112 component and edge region A, thus helping to reduce the impact of overheating on the heat exchange of the battery cell assembly 1110.

[0175] In this embodiment, the battery cell assembly 1110 avoids the edge region A, which is prone to overheating, thereby reducing the impact of overheating on the battery cell assembly 1110 and protecting the battery cell assembly 1110.

[0176] In some embodiments, as shown in FIG3, the battery device 1100 further includes a housing body 1130, a thermal management component 1140 connected to the housing body 1130 and together with the housing body 1130 forming a receiving cavity 1133, a battery cell assembly 1110 being housed in the receiving cavity 1133, and the thermal management component 1140 being able to support the battery cell assembly 1110.

[0177] Specifically, the housing body 1130 may include a cover 1131 and a frame 1132, which cover each other. The cover 1131, frame 1132, and thermal management component 1140 together define a receiving cavity 1133 for accommodating the battery cell assembly 1110. The cover 1131 may be a plate-like structure, and the frame 1132 may be a hollow structure with openings at both ends. For example, the frame 1132 may be an annular frame structure. The cover 1131 covers one open side of the frame 1132, and the thermal management component 1140 is connected to the other open side of the frame 1132. The cover 1131 may be disposed opposite to the thermal management component 1140. The housing body 1130 may have various shapes, such as a cylinder or a cuboid.

[0178] The thermal management component 1140 can be connected to the housing body 1130. The thermal management component 1140 can form the bottom plate of the housing, so that it can exchange heat with the battery cell assembly 1110 and also support the battery cell assembly 1110. This helps to simplify the structure of the external housing body 1130 and reduce the weight of the battery device 1100.

[0179] In the structure of the aforementioned box body 1130, taking the box body 1130 as a vertically placed example, the edge region A can be located below the box frame 1132, so that the edge region A can avoid the battery cell assembly 1110.

[0180] In some embodiments, referring to Figures 9, 12, and 13, the thermal management component 1140 has a heat exchange surface 1143, which has a first region D and a second region C. In a first direction X, the second region C is distributed in the middle of the heat exchange surface 1143, and the first region D is distributed on both sides of the second region C. A plurality of heat exchange sub-channels 11441 correspond to the second region C and the plurality of heat exchange sub-channels 11441 correspond to the first region D. The flow path from the inlet channel 11444 to the upstream channel 11442 of the plurality of heat exchange sub-channels 11441 corresponding to the second region C is smaller than the flow path from the inlet channel 11444 to the upstream channel 11442 of the plurality of heat exchange sub-channels 11441 corresponding to the first region D.

[0181] Specifically, the first region D and the second region C are regions on the heat exchange surface 1143 corresponding to the heat exchange sub-channel 11441, respectively. Taking the first direction X as the width direction of the heat exchange surface 1143 as an example, the heat exchange surface 1143 has a second region C located in the middle and a first region D relatively far from the middle in the width direction. The middle can be understood as the part of the heat exchange surface 1143 that is closer to the center in the width direction.

[0182] Of the multiple heat exchange sub-channels 11441, some are set in the first region D, and some are set in the second region C. That is, the heat exchange sub-channels 11441 corresponding to the first region D are far from the middle of the heat exchange surface 1143. Since the temperature of the corresponding battery cell module 1110 is more likely to rise sharply the closer it is to the middle region of the heat exchange surface 1143 (i.e., the second region C), the heat exchange sub-channels 11441 arranged in this middle region need to be able to replenish the heat exchange medium more promptly. Therefore, the flow path between the upstream channels 11442 of the multiple heat exchange sub-channels 11441 corresponding to the second region C, which enter from the inlet channel 11444, is shortened. This allows the heat exchange medium to flow into the upstream channels 11442 of the second region C more quickly, achieving the purpose of rapid heat exchange for the battery cell module 1110 in this region. This helps to reduce the risk of a sharp rise in the temperature of the battery cell module 1110 in the middle region.

[0183] Therefore, it can be understood that the second region C can be considered a priority cooling zone, which is distributed in the central region of the heat exchange surface 1143, corresponding to the battery cell 1112 located in the central region. Given the larger heat generation of the battery cell 1112 located in the central region, it is necessary to ensure sufficient heat exchange for the battery cell 1112 in the central region with high heat exchange demand. When heat exchange is unstable or the amount of heat exchange refrigerant is low, the overheated area on the heat exchange surface 1143 may increase, exacerbating the temperature difference of the cold plate. Therefore, it is necessary to prioritize cooling the area with high heat exchange, that is, to prioritize cooling the second region C. Thus, the flow path between the upstream flow channel 11442 and the inlet flow channel 11444 corresponding to the second region C is made smaller, allowing the heat exchange medium to flow in more quickly, improving heat exchange efficiency, and facilitating balanced heat exchange.

[0184] Furthermore, it should be noted that the density of the upstream flow channel 11442 corresponding to the second region C should be greater than the density of the upstream flow channel 11442 corresponding to the first region D, and the density of the downstream flow channel 11443 corresponding to the second region C should also be greater than the density of the downstream flow channel 11443 corresponding to the first region D, thereby improving the heat exchange efficiency.

[0185] In this embodiment, by reducing the flow path of the heat exchange medium into the upstream flow channel 11442 corresponding to the second region C, the heat exchange medium can reach the upstream flow channel 11442 of the region more promptly, thereby achieving the purpose of rapidly cooling the battery cell assembly 1110 in the middle region. This helps to reduce the risk of a sharp increase in temperature of the battery cell assembly 1110 in the middle region and helps to achieve balanced heat exchange of the battery cell assembly 1110.

[0186] In some embodiments, as shown in FIG7-9, the thermal management component 1140 has a flow channel group inside, the flow channel group including two heat exchange flow channels 1144, the thermal management component 1140 has a symmetry plane 1145, and the two heat exchange flow channels 1144 are symmetrically arranged on both sides of the symmetry plane 1145.

[0187] Specifically, the flow channel group can be understood as the sum of all heat exchange flow channels 1144 arranged inside the heat management component 1140. The flow channel group includes two heat exchange flow channels 1144, each heat exchange flow channel 1144 includes multiple heat exchange sub-flow channels 11441, each heat exchange sub-flow channel 11441 includes multiple upstream flow channels 11442, multiple downstream flow channels 11443, and loop guide flow channels 11448.

[0188] The symmetry plane 1145 should be understood as a virtual surface, and the symmetry plane 1145 should be understood as an imaginary plane perpendicular to the heat exchange surface 1143. The projection of the symmetry plane 1145 onto the heat exchange surface 1143 forms the axis of symmetry, which should be understood as the line of symmetry of the heat exchange surface 1143. The battery cell assembly 1110 on both sides of the axis of symmetry should be arranged symmetrically.

[0189] The flow channel group is divided into two heat exchange channels 1144, so that the two heat exchange channels 1144 are arranged symmetrically about the symmetry plane 1145. Since the temperature distribution of the battery cell module 1110 on both sides of the symmetry plane 1145 is relatively symmetrical, the purpose of symmetrical design of the heat exchange channels 1144 on both sides of the symmetry plane 1145 is to make the flow channel distribution on both sides of the symmetry plane 1145 more uniform, thereby achieving balanced heat dissipation of the battery cell module 1110 and controlling the temperature distribution difference of the symmetrical area of ​​the battery cell module 1110 within the design range.

[0190] In this embodiment, by designing two symmetrically arranged heat exchange channels 1144, it is beneficial to improve the balanced heat dissipation of the battery cell assembly 1110 by the thermal management component 1140.

[0191] In some embodiments, as shown in FIG5 and FIG6, the battery cell assembly 1110 includes a plurality of battery cell modules 1111 arranged along a first direction X, and each battery cell module 1111 includes a plurality of battery cells 1112 arranged along a second direction Y.

[0192] Specifically, each battery cell module 1111 includes multiple battery cells 1112, which are arranged sequentially along the second direction Y, so that each battery cell module 1111 has a certain extension length along the second direction Y. The length direction of the battery cell module 1111 is consistent with the extension length direction of the upstream flow channel 11442 and the downstream flow channel 11443. The multiple upstream flow channels 11442 and the multiple downstream flow channels 11443 can also be arranged at intervals in the width direction of the battery cell module 1111, so that the distribution between the upstream flow channels 11442 and the downstream flow channels 11443 and the battery cell module 1111 is more uniform, which is beneficial to improving the heat exchange balance of the heat exchange channel 1144 to the battery cell assembly 1110.

[0193] In this embodiment, the arrangement of the battery cell assembly 1110 matches the arrangement of the heat exchange channel 1144, which helps to improve the uniformity of heat exchange between the heat exchange channel 1144 and the battery cell assembly 1110.

[0194] In some embodiments, as shown in FIG2, the thermal management component 1140 is located within the receiving cavity 1133 and disposed on the bottom 11222 of the housing assembly 1120 to support the battery cell assembly 1110.

[0195] For the housing assembly 1120, the housing assembly 1120 is used to accommodate the battery cell assembly 1110. The housing assembly 1120 may include a first part 1121 and a second part 1122, which overlap each other, and together define a receiving cavity 1133 for accommodating the battery cell assembly 1110. The first part 1121 may be a plate-like structure, and the second part 1122 may be a hollow structure with one open end. The first part 1121 covers the open side of the second part 1122 to jointly define the receiving cavity 1133. Optionally, the first part 1121 may also be a hollow structure with one open side, in which case the second part 1122 may also be a hollow structure with one open end, and the open side of the first part 1121 covers the open side of the second part 1122 to jointly define the receiving cavity 1133. The housing assembly 1120 can be of various shapes, such as a cylinder or a cuboid. The second part 1122 may include a frame 11221 and a bottom 11222. The bottom 11222 may be a plate structure, hence it is also called the bottom plate. The frame 11221 is arranged around the housing assembly 1120 to form the side wall. The frame 11221 forms two openings, one at the top and one at the bottom. The bottom 11222 is connected to the bottom opening of the frame 11221, and the second part 1122 is connected to the top opening of the frame 11221.

[0196] Generally, when the battery pack 1100 is placed horizontally, the bottom plate of the box is also horizontal, and the thermal management component 1140 can be placed on the bottom plate. At this time, the thermal management component 1140 can be plate-shaped, and the upper surface of the thermal management component 1140 forms the heat exchange surface 1143. The bottom surface of each battery cell 1112 in the battery cell assembly 1110 abuts against the heat exchange surface 1143. The thermal management component 1140 can also support and support the battery cell assembly 1110.

[0197] In this embodiment, the thermal management component 1140 is placed on the bottom 11222 of the housing assembly 1120, thereby realizing heat exchange at the bottom of the battery cell assembly 1110. The heat exchange area is large, which is beneficial to improving the heat exchange efficiency.

[0198] In some embodiments, as shown in FIG3, the housing assembly 1120 includes a housing body 1130, a thermal management component 1140 connected to the housing body 1130 and together with the housing body 1130 forming a receiving cavity 1133, a battery cell assembly 1110 being housed in the receiving cavity 1133, and the thermal management component 1140 being able to support the battery cell assembly 1110.

[0199] Specifically, the housing body 1130 may include a cover 1131 and a frame 1132, which cover each other. The cover 1131, frame 1132, and thermal management component 1140 together define a receiving cavity 1133 for accommodating the battery cell assembly 1110. The cover 1131 may be a plate-like structure, and the frame 1132 may be a hollow structure with openings at both ends. For example, the frame 1132 may be an annular frame structure. The cover 1131 covers one open side of the frame 1132, and the thermal management component 1140 is connected to the other open side of the frame 1132. The cover 1131 may be disposed opposite to the thermal management component 1140. The housing body 1130 may have various shapes, such as a cylinder or a cuboid.

[0200] In this embodiment, the thermal management component 1140 can be connected to the box body 1130. The thermal management component 1140 can form the bottom plate of the box, so that it can exchange heat with the battery cell assembly 1110 and also support the battery cell assembly 1110. This helps to simplify the structure of the external box body 1130 and reduce the weight of the battery device 1100.

[0201] In some embodiments, as shown in FIG2-9, the battery device 1100 further includes a connector component 1150, which is connected to the thermal management component 1140 and is respectively connected to each inlet flow channel 11444 and each outlet flow channel 11445.

[0202] The connector component 1150 has a flow channel inlet and a flow channel outlet. The flow channel inlet is connected to each inlet flow channel 11444 and further connected to the sub-inlet 114421 of each upstream flow channel 11442. The flow channel outlet is connected to each outlet flow channel 11445 and further connected to the sub-outlet 114431 of each downstream flow channel 11443. The connector component 1150 can be connected to the heat management component 1140 by welding, or it can be connected to the heat management component 1140 by fasteners or other components. The connector component 1150 can be located on the upper part of the heat exchange surface 1143 and close to the edge of the heat exchange surface 1143.

[0203] In this embodiment, by providing a connector component 1150, it is easy to connect to an external pipeline used for transporting heat exchange medium (i.e., heat exchange refrigerant), thereby improving the ease of assembly.

[0204] In some embodiments, the width of the heat exchange channel 1144 ranges from 6 to 15 mm.

[0205] Specifically, since the heat exchange channel 1144 includes an upstream channel 11442 and a downstream channel 11443, the width of the heat exchange channel 1144 refers to the width dimensions of the upstream channel 11442 and the downstream channel 11443 in a plane parallel to the heat exchange surface 1143 and perpendicular to the extension direction. For example, if the upstream channel 11442 and the downstream channel 11443 both extend along the second direction Y, then the width of the upstream channel 11442 and the downstream channel 11443 refers to the width dimensions of the upstream channel 11442 and the downstream channel 11443 in the first direction X.

[0206] If the width of the heat exchange channel 1144 is too small, it may increase the flow resistance of the refrigerant, and excessive resistance may reduce the heat exchange effect. On the other hand, if the heat exchange channel 1144 is too wide, it may cause the refrigerant to flow too slowly and fail to remove heat in time.

[0207] In this embodiment, the width of the heat exchange channel 1144 is set to 6-15mm. This width range ensures that the refrigerant circulates under reasonable pressure drop and flow rate, thus ensuring the stable operation of the thermal management system of the entire battery device.

[0208] In some embodiments, the width of the heat exchange channel 1144 ranges from 6 to 10 mm.

[0209] Similarly, referring to the above embodiments, if the width of the heat exchange channel 1144 is too large or too small, it will affect the heat exchange of the thermal management component 1140 to the battery cell assembly 1110. Therefore, after a large number of tests, the width range of the heat exchange channel 1144 is 6-10mm, so that the width data of the heat exchange channel 1144 is more accurate.

[0210] In this embodiment, a width range of 6-10 mm can improve the heat exchange performance of the thermal management component 1140 while also taking into account the structural strength of the thermal management component 1140. This ensures that the thermal management component 1140 will not weaken its strength due to an excessively wide heat exchange channel 1144, thus achieving a balance between the heat exchange performance and structural strength of the thermal management component 1140.

[0211] In some embodiments, the heat exchange channel 1144 is filled with a phase change medium.

[0212] Specifically, a phase change medium is a substance that can undergo a phase change at a specific temperature, absorbing or releasing a large amount of latent heat during the phase change process. In this example, a phase change medium is used as the heat exchange medium. When the battery cell assembly 1110 generates a large amount of heat during charging and discharging, the phase change medium in the heat exchange channel 1144 absorbs the heat and undergoes a phase change, slowing down the rapid temperature rise of the battery device 1100. When the temperature of the battery device 1100 decreases, the phase change medium releases heat, mitigating the impact of excessively low battery temperature on performance. Using a phase change medium as the heat exchange medium helps maintain a relatively stable temperature for the battery device 1100, reducing problems such as capacity decay and shortened lifespan due to excessively high temperatures, or increased internal resistance and reduced charging and discharging efficiency due to excessively low temperatures, thereby improving the overall performance, reliability, and stability of the battery device 1100.

[0213] It should be noted that the phase change medium and the refrigerant can work together. For example, in a large-scale battery energy storage system, the refrigerant is responsible for transferring the heat generated by the battery cell module 1110 from the battery module to the heat dissipation end of the entire thermal management system, while the phase change medium is placed inside the battery module. When the battery cell module 1110 generates a large amount of heat in a short period of time, the phase change medium quickly absorbs the heat and undergoes a phase change, mitigating the rapid temperature rise and buying time for the refrigerant to further dissipate heat. The two work together to improve the efficiency and stability of the thermal management system.

[0214] In this embodiment, filling the heat exchange channel 1144 with a phase change medium is beneficial to improving the heat exchange efficiency and enhancing the performance stability of the battery device 1100.

[0215] In some embodiments, the thermal management component 1140 is formed from one or more of metals and non-metals.

[0216] Specifically, metallic materials, such as copper and aluminum, possess excellent thermal conductivity, enabling rapid heat transfer and allowing the thermal management component 1140 to efficiently dissipate the heat generated by the battery cell assembly 1110. Non-metallic materials, like ceramics, offer unique thermal performance advantages; for example, some ceramic materials exhibit high-temperature resistance, maintaining stable thermal conductivity even under high-temperature environments. Combining metallic and non-metallic materials fully leverages their respective thermal conductivity advantages, ensuring the thermal management component 1140 maintains efficient thermal conductivity across different operating temperature ranges and thermal load conditions, thereby enhancing the overall performance of the battery thermal management system.

[0217] In this embodiment, the material selection of the thermal management component 1140 is more flexible and varied, and it can be flexibly combined and prepared according to the heat exchange requirements of the battery device 1100, so that the thermal management component 1140 can maintain efficient heat conduction capability and improve the overall performance of the battery thermal management system.

[0218] In a specific embodiment, referring to FIG2-16, the battery device 1100 includes a housing assembly 1120, a battery cell assembly 1110, and a thermal management component 1140. The housing assembly 1120 has a receiving cavity 1133 inside; the battery cell assembly 1110 is disposed within the receiving cavity 1133; the thermal management component 1140 is configured to exchange heat with the battery cell assembly 1110; the thermal management component 1140 has a heat exchange channel 1144 inside, the heat exchange channel 1144 including multiple parallel heat exchange sub-channels 11441, each heat exchange sub-channel 11441 including a connected upstream channel 11442 and a downstream channel 11443. The upstream channel 11442 of some heat exchange sub-channels 11441... 442 is adjacent to and thermally connected to the downstream flow channel 11443 in the adjacent heat exchange sub-channel 11441. Some of the downstream flow channels 11443 in the heat exchange sub-channel 11441 are adjacent to and thermally connected to the upstream flow channel 11442 in the adjacent heat exchange sub-channel 11441. Multiple heat exchange sub-channels 11441 are arranged sequentially along a first direction. The upstream flow channels 11442 and downstream flow channels 11443 in the heat exchange sub-channel 11441 both extend along a second direction, where the second direction Y is perpendicular to the first direction X. The heat exchange channel 1144 also includes at least one inlet flow channel 11444 and at least one outlet flow channel 11445. The inlet flow channel 11444 is connected to multiple upstream flow channels 11442, and the outlet flow channel 11445 is connected to multiple downstream flow channels 11442. The heat exchange channel 11444 is connected to the inlet channel 11444; the heat exchange channel 11444 also includes a first branch channel 11446 and a plurality of second branch channels 11447, each of which is connected to the first branch channel 11446. The first branch channel 11446 extends along a first direction X and is connected to the inlet channel 11444; each of the second branch channels 11447 extends along a second direction Y and is respectively connected to each of the upstream channels 11442; the second direction Y is perpendicular to the first direction X; the inlet channel 11444 and the outlet channel 11445 are arranged adjacent to each other; the heat exchange channel 11444 also includes a loop guide channel 11448, and each downstream channel 11443 is located away from the inlet channel. Each side of the heat exchange channel 11444 has a sub-outlet 114431, and the outlet flow channel 11445 is connected to each sub-outlet 114431 through the loop guide flow channel 11448. Along the first direction X, the loop guide flow channel 11448 is located at one or both ends of the heat exchange flow channel 1144. An edge region A is formed on the surface of the thermal management component 1140 near the edge, and the loop guide flow channel 11448 is configured corresponding to the edge region A. The edge region A is arranged to avoid the battery cell assembly 1110. The thermal management component 1140 has a flow channel group inside, which includes two heat exchange flow channels 1144. The thermal management component 1140 has a symmetry plane 1145, and the two heat exchange flow channels 1144 are symmetrically arranged on both sides of the symmetry plane 1145.

[0219] According to some embodiments of this application, this application also provides a thermal management component 1140, which has a heat exchange channel 1144 inside. The heat exchange channel 1144 includes a plurality of heat exchange sub-channels 11441 arranged in parallel. Each heat exchange sub-channel 11441 includes an upstream channel 11442 and a downstream channel 11443 that are connected to each other. The upstream channel 11442 in some heat exchange sub-channels 11441 is adjacent to and thermally connected to the downstream channel 11443 in the adjacent heat exchange sub-channel 11441; and / or, the downstream channel 11443 in some heat exchange sub-channels 11441 is adjacent to and thermally connected to the upstream channel 11442 in the adjacent heat exchange sub-channel 11441.

[0220] In some embodiments, a plurality of heat exchange sub-channels 11441 are arranged sequentially along a first direction, and the upstream channel 11442 and the downstream channel 11443 in the heat exchange sub-channels 11441 are both extended along a second direction, the second direction Y being perpendicular to the first direction X.

[0221] In some embodiments, the heat exchange channel 1144 further includes a loop guide channel 11448, wherein each downstream channel 11443 is configured to communicate with the loop guide channel 11448 at an end away from the upstream channel 11442; an edge region A is formed on the surface of the thermal management component 1140 near the edge, and the loop guide channel 11448 is configured corresponding to the edge region A.

[0222] In some embodiments, the thermal management component 1140 has a flow channel group inside, the flow channel group including two heat exchange flow channels 1144, the thermal management component 1140 has a symmetry plane 1145, and the two heat exchange flow channels 1144 are symmetrically arranged on both sides of the symmetry plane 1145.

[0223] The example of thermal management component 1140 in this application is based on the example of battery device 1100 described above. The structure of thermal management component 1140 in the example of battery device 1100 is the same as that of thermal management component 1140 in this example, and the technical effects are the same. It will not be repeated here. For details, please refer to the description of battery device 1100 described above.

[0224] According to some embodiments of this application, this application also provides an energy storage device, which includes a plurality of battery devices 1100 as described in the above embodiments, the battery devices 1100 being used to store or provide electrical energy.

[0225] Specifically, the energy storage device may include one or more battery clusters to increase the voltage and capacity of the energy storage device. A battery cluster may include multiple battery devices 1100, which are connected in series via a busbar to increase the voltage of the energy storage device. When the energy storage device includes multiple battery clusters, the battery clusters are connected in parallel to increase the capacity of the energy storage device.

[0226] Energy storage devices can be used in energy storage power stations, wind power generation systems, solar power generation systems, mobile power systems, or temporary power supply systems. Energy storage devices can store electrical energy as needed and output it when appropriate. For example, an energy storage device can store electrical energy during off-peak hours and provide power to relevant users or electrical equipment during peak hours. The energy storage system provided in this application embodiment can be any power system that requires energy storage devices.

[0227] In some embodiments, the energy storage device is an energy storage container or an energy storage cabinet.

[0228] In some embodiments, the energy storage device may include a cabinet and one or more battery clusters housed within the cabinet.

[0229] In some embodiments, the energy storage device may include modules such as a thermal management module, a main control module, a central control module, a power distribution module, and a fire protection module.

[0230] As an example, the thermal management module may include a liquid cooling unit that supplies coolant to each battery device 1100 via piping to regulate the temperature of the individual battery cells.

[0231] As an example, the main control module can serve as the battery management unit for the battery cluster, used to monitor and manage the battery cluster. The main control module can monitor information such as the current, voltage, power, or temperature of the battery cluster. For instance, it can control the charging and discharging current and voltage of the battery cluster. The main control module includes modules such as an auxiliary battery management unit (SBMU) and a fusion switch.

[0232] As an example, the central control module can serve as the battery management unit for an energy storage device, used to monitor and manage the device. The central control module can monitor information such as the energy storage device's current, voltage, power, state of charge, or temperature. For instance, it can control the charging and discharging current and voltage of the energy storage device. As an example, the central control module includes modules such as an Insulation Monitoring Module (IMM), a Master Battery Management Unit (MBMU), an Ethernet (ETH) module, and a fiber optic conversion module.

[0233] As an example, the fire protection module includes a control panel, detectors, alarm devices, etc., used to detect, alarm, or extinguish fires in the energy storage system.

[0234] As an example, a power distribution module can be used to distribute power to modules in an energy storage device that require electricity.

[0235] According to some embodiments of this application, this application also provides an energy storage system, which includes a power conversion device and an energy storage device as described in the above embodiments. The power conversion device is used to electrically connect the power generation device and the energy storage device.

[0236] In some embodiments, the energy storage system may include one or more energy storage devices and a power conversion system (PCS), wherein the power conversion system is used to connect the power generation device and the energy storage device. The power generation device generates electrical energy, which can be stored in the energy storage device through the power conversion system. As examples, the power generation device may specifically be a solar panel, a hydroelectric power generation device, a thermal power generation device, a wind power generation device, etc. The specific type of power generation device is not limited in this application.

[0237] According to some embodiments of this application, referring to FIG1, this application also provides an electrical device, which includes the battery device 1100 in the above embodiments, the energy storage device in the above embodiments, or the energy storage system in the above embodiments. The battery device 1100 is used to store or provide electrical energy.

[0238] The technical solutions described in the embodiments of this application are applicable to various electrical devices that use individual battery cells, such as mobile phones, portable devices, laptops, electric vehicles, electric toys, power tools, vehicles, ships, and spacecraft. For example, spacecraft include airplanes, rockets, space shuttles, and spacecraft.

[0239] The examples of electrical devices in this application are based on the examples of the battery device 1100 described above. The examples of electrical devices include all the technical effects of the examples of the battery device 1100 described above, and will not be repeated here.

[0240] According to some embodiments of this application, this application also provides a charging network, which includes charging piles and energy storage devices or energy storage systems as described in the above embodiments, wherein the energy storage devices are used to provide electrical energy to the charging piles.

[0241] For example, the charging network includes charging stations and energy storage devices. The charging stations are electrically connected to the energy storage devices, which provide power to the charging stations. The charging stations are also electrically connected to a battery unit 1100 in the energy storage devices via cables. The battery unit 1100 can provide its stored electrical energy to the charging stations. The charging stations have one or more connectors for connecting to electrical devices (such as vehicle 1000) to replenish their power.

[0242] Energy storage devices can be located inside the charging pile (e.g., an integrated energy storage and charging unit) or outside the charging pile.

[0243] The above are merely preferred embodiments of this application, and only specifically describe the technical principles of this application. These descriptions are only for explaining the principles of this application and should not be construed as limiting the scope of protection of this application in any way. Based on this explanation, any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application, as well as other specific embodiments of this application that can be conceived by those skilled in the art without creative effort, should be included within the scope of protection of this application.

Claims

1. A battery device (1100), characterized in that, include: The housing assembly (1120) has an internal receiving cavity (1133); A battery cell assembly (1110) is disposed within the receiving cavity (1133); A thermal management component (1140) through which refrigerant flows; The thermal management component (1140) is configured to exchange heat with the battery cell assembly (1110); the thermal management component (1140) has a heat exchange channel (1144) inside, the heat exchange channel (1144) includes a plurality of parallel heat exchange sub-channels (11441), each of the heat exchange sub-channels (11441) includes an upstream channel (11442) and a downstream channel (11443) that are connected to each other, the upstream channel (11442) of some of the heat exchange sub-channels (11441) is adjacent to and thermally connected to the downstream channel (11443) of the adjacent heat exchange sub-channel (11441); and / or, the downstream channel (11443) of some of the heat exchange sub-channels (11441) is adjacent to and thermally connected to the upstream channel (11442) of the adjacent heat exchange sub-channel (11441).

2. The battery device (1100) as claimed in claim 1, characterized in that, The heat exchange sub-channel (11441) includes a first heat exchange sub-channel and a second heat exchange sub-channel; the second heat exchange sub-channel is located on one side of the first heat exchange sub-channel and is arranged adjacent to the first heat exchange sub-channel, and the downstream channel (11443) in the first heat exchange sub-channel is adjacent to and thermally connected to the upstream channel (11442) in the second heat exchange sub-channel (11441).

3. The battery device (1100) as claimed in claim 1, characterized in that, The heat exchange sub-channel (11441) includes a first heat exchange sub-channel, a second heat exchange sub-channel, and a third heat exchange sub-channel; the second heat exchange sub-channel and the third heat exchange sub-channel are respectively located on both sides of the first heat exchange sub-channel and are arranged adjacent to the first heat exchange sub-channel; the downstream channel (11443) in the first heat exchange sub-channel is adjacent to and thermally connected to the upstream channel (11442) in the second heat exchange sub-channel (11441); and The upstream channel (11443) in the first heat exchange sub-channel is adjacent to and thermally connected to the downstream channel (11442) in the third heat exchange sub-channel (11441).

4. The battery device (1100) as claimed in claim 1, characterized in that, Multiple heat exchange sub-channels (11441) are arranged sequentially along a first direction. The upstream channel (11442) and the downstream channel (11443) of the heat exchange sub-channels (11441) both extend along a second direction (Y), which is perpendicular to the first direction (X).

5. The battery device (1100) according to any one of claims 1-4, characterized in that, The heat exchange channel (1144) further includes at least one inlet channel (11444) and at least one outlet channel (11445), the inlet channel (11444) being connected to a plurality of the upstream channels (11442), and the outlet channel (11445) being connected to a plurality of the downstream channels (11443).

6. The battery device (1100) as claimed in claim 5, characterized in that, The heat exchange channel (1144) further includes a first branch channel (11446) and a plurality of second branch channels (11447) that are all connected to the first branch channel (11446). The first branch channel (11446) extends along a first direction (X) and is connected to the inlet channel (11444). Each of the second branch channels (11447) extends along a second direction (Y) and is respectively connected to each of the upstream channels (11442). The second direction (Y) is perpendicular to the first direction (X).

7. The battery device (1100) as claimed in claim 5, characterized in that, The inlet channel (11444) and the outlet channel (11445) are arranged adjacent to each other.

8. The battery device (1100) as claimed in claim 4, characterized in that, Along the first direction (X), the two ends of the heat exchange channel (1144) are respectively configured as downstream channels (11443).

9. The battery device (1100) as claimed in claim 5, characterized in that, Along the first direction (X), the inlet channel (11444) and the outlet channel (11445) are located on the same side; the heat exchange channel (1144) further includes a loop guide channel (11448), each of the downstream channels (11443) has a sub-outlet (114431) on the side away from the inlet channel (11444), and the outlet channel (11445) is connected to each of the sub-outlets (114431) through the loop guide channel (11448); along the first direction (X), the loop guide channel (11448) is located at one or both ends of the heat exchange channel (1144).

10. The battery device (1100) as claimed in claim 9, characterized in that, The loop guide channel (11448) includes a plurality of guide sub-channels (11449) extending and communicating along the second direction (Y), and the plurality of guide sub-channels (11449) are connected between the outlet channel (11445) and each of the sub-outlets (114431).

11. The battery device (1100) as claimed in claim 10, characterized in that, Along the first direction (X), two adjacent guide channels (11449) have a first interval distance (L1); each of the heat exchange channels (11441) has multiple upstream channels (11442) arranged at intervals along the first direction (X), and two adjacent upstream channels (11442) have a second interval distance (L2); each of the heat exchange channels (11441) has multiple downstream channels (11443) arranged at intervals along the first direction (X), and two adjacent downstream channels (11443) have a third interval distance (L3); the first interval distance (L1) is smaller than the second interval distance (L2) and the third interval distance (L3).

12. The battery device (1100) as claimed in claim 9, characterized in that, An edge region (A) is formed on the surface of the thermal management component (1140) near the edge, and the loop guide channel (11448) is configured corresponding to the edge region (A).

13. The battery device (1100) as claimed in claim 11, characterized in that, The edge region (A) is positioned to avoid the battery cell assembly (1110).

14. The battery device (1100) as claimed in claim 5, characterized in that, The thermal management component (1140) has a heat exchange surface (1143) having a first region (D) and a second region (C). In a first direction (X), the second region (C) is located in the middle of the heat exchange surface (1143), and the first region (D) is located on both sides of the second region (C). A plurality of heat exchange sub-channels (11441) correspond to the second region (C), and a plurality of heat exchange sub-channels (11441) correspond to the first region (D). The flow path from the inlet channel (11444) to the upstream channel (11442) of the plurality of heat exchange sub-channels (11441) corresponding to the second region (C) is smaller than the flow path from the inlet channel (11444) to the upstream channel (11442) of the plurality of heat exchange sub-channels (11441) corresponding to the first region (D).

15. The battery device (1100) according to any one of claims 1-4, characterized in that, The thermal management component (1140) has a flow channel group inside, the flow channel group including two heat exchange flow channels (1144), the thermal management component (1140) has a symmetry plane (1145), and the two heat exchange flow channels (1144) are symmetrically arranged on both sides of the symmetry plane (1145).

16. The battery device (1100) as claimed in claim 4, characterized in that, The battery cell assembly (1110) includes a plurality of battery cell modules (1111) arranged along the first direction (X), and each of the battery cell modules (1111) includes a plurality of battery cells (1112) arranged along the second direction (Y).

17. The battery device (1100) according to any one of claims 1-4, characterized in that, The thermal management component (1140) is located within the receiving cavity (1133) and disposed on the bottom (11222) of the housing assembly (1120) to support the battery cell assembly (1110).

18. The battery device (1100) according to any one of claims 1-4, characterized in that, The housing assembly (1120) includes a housing body (1130), the thermal management component (1140) is connected to the housing body (1130) and together with the housing body (1130) forms a receiving cavity (1133), and the thermal management component (1140) can be used to support the battery cell assembly (1110).

19. The battery device (1100) as claimed in claim 5, characterized in that, The battery device (1100) further includes a connector component (1150), which is connected to the thermal management component (1140) and is respectively connected to each of the inlet channels (11444) and each of the outlet channels (11445).

20. The battery device (1100) according to any one of claims 1-19, characterized in that, The width of the heat exchange channel (1144) ranges from 6 to 15 mm.

21. The battery device (1100) according to any one of claims 1-19, characterized in that, The width of the heat exchange channel (1144) ranges from 6 to 10 mm.

22. The battery device (1100) according to any one of claims 1-19, characterized in that, The heat exchange channel (1144) is filled with a phase change medium.

23. The battery device (1100) according to any one of claims 1-19, characterized in that, The thermal management component (1140) is formed from one or more of metals and non-metals.

24. A thermal management component (1140), characterized in that, The thermal management component (1140) has a heat exchange channel (1144) inside. The heat exchange channel (1144) includes a plurality of heat exchange sub-channels (11441) arranged in parallel. Each heat exchange sub-channel (11441) includes an upstream channel (11442) and a downstream channel (11443) that are connected. The upstream channel (11442) of some of the heat exchange sub-channels (11441) is adjacent to and thermally connected to the downstream channel (11443) of the adjacent heat exchange sub-channel (11441); and / or, the downstream channel (11443) of some of the heat exchange sub-channels (11441) is adjacent to and thermally connected to the upstream channel (11442) of the adjacent heat exchange sub-channel (11441).

25. The thermal management component (1140) as claimed in claim 24, characterized in that, Multiple heat exchange sub-channels (11441) are arranged sequentially along a first direction. The upstream channel (11442) and the downstream channel (11443) of the heat exchange sub-channels (11441) both extend along a second direction, which is perpendicular to the first direction (X).

26. The thermal management component (1140) as claimed in claim 24, characterized in that, The heat exchange channel (1144) further includes a loop guide channel (11448), and each of the downstream channels (11443) is connected to the loop guide channel (11448) at the end away from the upstream channel (11442); an edge region (A) is formed on the surface of the thermal management component (1140) near the edge, and the loop guide channel (11448) is configured corresponding to the edge region (A).

27. The thermal management component (1140) as claimed in claim 24, characterized in that, The thermal management component (1140) has a flow channel group inside, the flow channel group including two heat exchange flow channels (1144), the thermal management component (1140) has a symmetry plane (1145), and the two heat exchange flow channels (1144) are symmetrically arranged on both sides of the symmetry plane (1145).

28. An electrical appliance, characterized in that, Includes a battery device (1100) as described in any one of claims 1-23, the battery device (1100) being used to store or provide electrical energy.

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