Battery device, refrigerant heat exchange device and electric device

Abstract

The utility model belongs to the technical field of battery production, and provides a battery device, a refrigerant heat exchange device and a power utilization device.The battery device comprises a battery monomer assembly and a refrigerant heat exchange part; wherein the refrigerant heat exchange component is configured to perform heat exchange with the battery monomer assembly, the refrigerant heat exchange component comprises a functional area and a non-functional area, a refrigerant heat exchange flow channel is arranged in the refrigerant heat exchange component, and the functional area at least coincides with the projection of the battery monomer assembly; the sectional area of the refrigerant heat exchange flow channel in the functional area is equal to that in the non-functional area. The utility model aims to improve the temperature equalization capability of the refrigerant heat exchange component.

Description

[0001] This application claims priority to Chinese Patent Application No. 202420907842.4, filed with the State Intellectual Property Office of China on April 28, 2024, entitled "Heat Exchanger, Battery 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, a refrigerant heat exchange device, and an 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 heat exchange components that can exchange heat between individual battery cells to cool down the individual battery cells.

[0004] In related technologies, the heat exchange components have poor temperature uniformity and uneven temperature distribution, which leads to uneven heat exchange between the heat exchange components and the battery cells, thus affecting the performance and service life of the battery device. Utility Model Content

[0005] The purpose of this application is to provide a battery device, a refrigerant heat exchange device, and an electrical device, which aims to solve the technical problem of poor temperature uniformity of the refrigerant heat exchange components in the battery device.

[0006] In a first aspect, this application provides a battery device, comprising:

[0007] Battery cell assembly;

[0008] The refrigerant heat exchange component is configured to exchange heat with the battery cell assembly. The refrigerant heat exchange component includes functional and non-functional areas. The refrigerant heat exchange component has a refrigerant heat exchange channel inside. The functional area at least coincides with the projection of the battery cell assembly. The cross-sectional area of ​​the refrigerant heat exchange channel in the functional area is equal to the cross-sectional area in the non-functional area.

[0009] In this embodiment, by making the cross-sectional areas of the refrigerant heat exchange channels in the functional and non-functional areas equal, it is beneficial to improve the flow resistance changes during the refrigerant flow process and reduce the flow resistance. The flow resistance is less likely to fluctuate drastically, which helps to reduce pressure loss (i.e., pressure drop). This, in turn, reduces the temperature difference between the inlet and outlet of the refrigerant heat exchange channel, resulting in a more uniform temperature distribution on the refrigerant heat exchange component and improved temperature uniformity performance. This, in turn, enhances the effect of the refrigerant heat exchange component on the balanced heat exchange of the battery cell assembly.

[0010] In one embodiment, the width of the refrigerant heat exchange channel is greater than or equal to 6 mm and less than or equal to 15 mm.

[0011] In this embodiment, the width of the refrigerant heat exchange channel is set to 6-15mm. This width range ensures that the refrigerant circulates under reasonable flow resistance, pressure drop, and flow rate, thus ensuring the stable operation of the thermal management system of the entire battery device.

[0012] In one embodiment, the width of the refrigerant heat exchange channel is greater than or equal to 6 mm and less than or equal to 10 mm.

[0013] In this embodiment, a width range of 6-10mm can improve the heat exchange performance of the refrigerant heat exchange component while also taking into account its structural strength. This prevents the refrigerant heat exchange component from weakening its strength due to an excessively wide heat exchange channel, thus achieving a balance between the heat exchange performance and structural strength of the refrigerant heat exchange component.

[0014] In one embodiment, the refrigerant heat exchange channel includes interconnected functional area channels and non-functional area channels, with the functional area channels corresponding to form functional areas and the non-functional area channels corresponding to form non-functional areas; the functional area channels and non-functional area channels are configured to be located on both sides of a first direction; the cross-sectional area of ​​the functional area channels is equal to the cross-sectional area of ​​the non-functional area channels.

[0015] In this embodiment, the functional area flow channels and non-functional area flow channels are set up in separate areas, which helps to improve the rationality of the flow channel layout and enable the functional area flow channels to better exchange heat with the battery cell modules.

[0016] In one embodiment, the functional area flow channel includes an upstream flow channel and a downstream flow channel that are connected to each other, and the non-functional area flow channel includes an inlet branch flow channel and a loop branch flow channel. The inlet branch flow channel is connected to the upstream flow channel, and the loop branch flow channel is connected to the downstream flow channel. The cross-sectional areas of the upstream flow channel, the downstream flow channel, the inlet branch flow channel, and the loop branch flow channel are all equal.

[0017] In this embodiment, the flow resistance is improved, which helps to reduce pressure loss. This reduces the pressure difference between the outlet and inlet of the refrigerant heat exchange channel, which in turn helps to reduce the temperature difference between the inlet and outlet of the refrigerant heat exchange channel. As a result, the temperature distribution on the refrigerant heat exchange component is more uniform, the temperature uniformity is improved, and the effect of the refrigerant heat exchange component on the balanced heat exchange of the battery cell assembly is enhanced.

[0018] In one embodiment, the functional area flow channel includes multiple heat exchange sub-flow channels arranged in parallel. Each heat exchange sub-flow channel includes an upstream flow channel and a downstream flow channel. The upstream flow channel in some heat exchange sub-flow channels is adjacent to and thermally compatible with the downstream flow channel in the adjacent heat exchange sub-flow channel. The downstream flow channel in some heat exchange sub-flow channels is adjacent to and thermally compatible with the upstream flow channel in the adjacent heat exchange sub-flow channel.

[0019] In this embodiment, 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. 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 makes the temperature distribution on the heat exchange surface of the refrigerant heat exchange component more uniform, thereby improving the heat exchange uniformity of the battery cell module.

[0020] 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.

[0021] 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.

[0022] In one embodiment, the inlet diversion channel includes a first diversion channel and a plurality of second diversion channels. The first diversion channel extends along a first direction, and each of the second diversion channels extends along a second direction. One extension end of each of the second diversion channels is connected to the first diversion channel, and the other extension end of each of the second diversion channels is respectively connected to each of the upstream channels. The second direction is perpendicular to the first direction. The cross-sectional areas of the first diversion channel and the second diversion channel are the same as the cross-sectional areas of the upstream channels.

[0023] In this embodiment, the first branch channel and the second branch channel are connected, and 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 non-functional area flow channel further includes at least one inlet flow channel and at least one outlet flow channel. The inlet flow channel is connected to multiple upstream flow channels through an inlet branch flow channel, and the outlet flow channel is connected to multiple downstream flow channels through a loop branch flow channel. The cross-sectional areas of the upstream flow channels, downstream flow channels, inlet branch flow channels, loop branch flow channels, inlet flow channels, and outlet flow channels are all equal.

[0025] In this embodiment, one inlet channel can connect to multiple upstream channels, and one outlet channel can connect to multiple downstream channels. This is beneficial for increasing the number of upstream and downstream channels, and for making reasonable plans and layouts to improve the uniformity of the layout, so as to improve the temperature uniformity of the heat exchange surface, i.e., the refrigerant heat exchange component.

[0026] In one embodiment, the inlet channel and the outlet channel are arranged adjacent to each other.

[0027] 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.

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

[0029] In this embodiment, by setting a loop guide channel and placing the loop guide channel at one or both ends of the heat exchange surface along the first direction, that is, placing the loop guide channel at the edge of the heat exchange surface, the loop guide channel corresponds to the battery cell assembly with a relatively low temperature at the edge, which helps to reduce the impact of the overheated area on the battery cell assembly and helps to achieve balanced heat exchange of 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 loop branch channel and each sub-outlet.

[0031] In this embodiment, by setting multiple guide sub-channels extending along the second direction, the recirculation of the refrigerant heat exchange channel is made smoother, which is conducive to improving the space utilization rate within the refrigerant heat exchange component and making the layout of the refrigerant 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 refrigerant heat exchange component near the edge, and the loop guide channel is configured corresponding to the edge region.

[0035] In this embodiment, the edge region of the refrigerant heat exchange component corresponds to the loop guide channel, which can correspond to the battery cell assembly in the edge region with 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 refrigerant heat exchange channels in the functional areas are arranged symmetrically.

[0039] In this embodiment, by designing symmetrically arranged functional area flow channels, it is beneficial to improve the balanced heat dissipation of the refrigerant heat exchange components to the battery cell assembly.

[0040] 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.

[0041] In this embodiment, the arrangement of the battery cell assembly is matched with the arrangement of the refrigerant heat exchange channel, which helps to improve the uniformity of heat exchange between the refrigerant heat exchange channel and the battery cell assembly.

[0042] In one embodiment, the refrigerant heat exchange component further includes a housing assembly having a receiving cavity, the refrigerant heat exchange component being located within the receiving cavity and disposed on the bottom of the housing assembly for supporting the battery cell assembly.

[0043] In this embodiment, the refrigerant heat exchange 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.

[0044] In one embodiment, the refrigerant heat exchange component includes a housing body, the refrigerant heat exchange component is connected to the housing body and together with the housing body to form a receiving cavity, and the refrigerant heat exchange component can be used to support the battery cell assembly.

[0045] In this embodiment, the refrigerant heat exchange 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.

[0046] In one embodiment, the battery device further includes a connector component that is connected to the refrigerant heat exchange component and communicates with the refrigerant heat exchange channel.

[0047] In this embodiment, by providing a connector component, it is easy to connect to an external pipeline used to transport the heat exchange medium, i.e., the heat exchange refrigerant, thereby improving the ease of assembly.

[0048] Secondly, this application provides a refrigerant heat exchange device, which includes a refrigerant heat exchange component in a battery device as described in any of the above claims.

[0049] 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.

[0050] 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, specific embodiments of this application are given below. Attached Figure Description

[0051] 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.

[0052] Figure 1 This application provides structural schematic diagrams of vehicles for some embodiments;

[0053] Figure 2 Schematic diagram of the exploded structure of the battery device provided in some embodiments of this application Figure 1 ;

[0054] Figure 3 Schematic diagram of the exploded structure of the battery device provided in some embodiments of this application Figure 2 ;

[0055] Figure 4 An exploded view of the refrigerant heat exchange component in a battery device provided in some embodiments of this application;

[0056] Figure 5 The relative positional relationship between the refrigerant heat exchange channel and the battery cell assembly in some embodiments of this application Figure 1 ;

[0057] Figure 6 The relative positional relationship between the refrigerant heat exchange channel and the battery cell assembly in some embodiments of this application Figure 2 ;

[0058] Figure 7Schematic diagram of the refrigerant heat exchange channel structure on the refrigerant heat exchange component in some embodiments of this application Figure 1 ;

[0059] Figure 8 Schematic diagram of the refrigerant heat exchange channel structure on the refrigerant heat exchange component in some embodiments of this application Figure 2 ;

[0060] Figure 9 Schematic diagram of the refrigerant heat exchange channel structure on the refrigerant heat exchange component in some embodiments of this application Figure 3 ;

[0061] Figure 10 for Figure 9 A magnified view of a portion of position A in the middle;

[0062] Figure 11 for Figure 8 A magnified view of a portion of the area at position B;

[0063] Figure 12 for Figure 9 A magnified view of the area at position C in the middle;

[0064] Figure 13 for Figure 9 A magnified view of a portion of the area at position D;

[0065] Figure 14 for Figure 9 A magnified view of the area at position E in the middle;

[0066] Figure 15 for Figure 9 A magnified view of the area at position F;

[0067] Figure 16 A schematic diagram of the temperature distribution of the refrigerant heat exchange channel in the refrigerant heat exchange component of the battery device provided in some embodiments of this application;

[0068] Figure 17 for Figure 7 BB section view in the middle;

[0069] Figure 18 for Figure 7 CC section view in the image.

[0070] Explanation of reference numerals in the attached figures:

[0071] 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 Housing; 1130, Housing Body; 1131, Cover; 1132, Housing Frame; 1133, Receiving Cavity; 1140, Refrigerant Heat Exchange Component; 1141, First Sub-component; 1142, Second Sub-component; 1143, Heat Exchange Surface; 1144, Refrigerant Heat Exchange Channel; 11441, Heat Exchange Sub-channel; 11442, Upstream Channel; 114421, Sub-inlet; 11443, Downstream Channel; 114431, Sub-outlet; 11444, Inlet Flow channels; 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; 1146, Functional area flow channel; 1147, Non-functional area flow channel; 1148, Inlet branch flow channel; 1149, Loop branch flow channel; 1150, Connector component; 1160, Functional area; 1170, Non-functional area; 1200, Controller; 1300, Motor; A, Edge area; B, First uniform temperature area; C, Second area; D, First area; E, Branch flow area; F, Second uniform temperature area; X, First direction; Y, Second direction; L1, First interval distance; L2, Second interval distance; L3, Third interval distance. Detailed Implementation

[0072] 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.

[0073] 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.

[0074] 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.

[0075] 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.

[0076] 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.

[0077] 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).

[0078] 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.

[0079] 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.

[0080] 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.

[0081] 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 refrigerant heat exchange components that can exchange heat between individual battery cells to cool down the individual battery cells.

[0082] 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 refrigerant 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. This results in a large accumulation of heat inside the battery pack, affecting its performance and lifespan, and potentially causing 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.

[0083] 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 device, increase internal resistance, reduce energy density, and in severe cases, may cause thermal runaway. Therefore, refrigerant heat exchange components are installed in battery devices to cool the individual battery cells.

[0084] Regarding the issue of uneven temperature distribution and localized high temperatures within battery devices, research has revealed that for refrigerant heat exchange components, numerous refrigerant heat exchange channels are formed within the component, creating functional and non-functional zones. However, in related technologies, the cross-sectional area of ​​the refrigerant heat exchange channels corresponding to the non-functional zones is larger, while the cross-sectional area of ​​the refrigerant heat exchange channels corresponding to the functional zones is smaller. An excessively narrow refrigerant heat exchange channel width may increase the flow resistance of the heat exchange refrigerant. Therefore, when the heat exchange refrigerant flows from the non-functional zone to the functional zone, the resistance within the channel increases, and excessive resistance may reduce the heat exchange effect. Furthermore, the direct cooling heat exchange method using refrigerant... In the formula, the heat exchange refrigerant gradually changes from a liquid or gas-liquid dual state to a single-phase gaseous state during its flow. It can be seen that the flow rate of the heat exchange refrigerant flowing into and out of the heat exchange component is the same. When the heat exchange refrigerant changes from a liquid to a gaseous state, its volume increases sharply. When the heat exchange refrigerant flows from the non-functional area into the functional area, the increased volume, combined with the reduction of the cross-sectional area of ​​the heat exchange channel corresponding to the functional area, will inevitably create a large flow resistance. This leads to an increase in the pressure difference between the inlet and outlet pressures of the heat exchange component, resulting in a large temperature difference between the inlet and outlet of the heat exchange refrigerant. Consequently, the temperature distribution on the heat exchange component becomes significantly uneven, resulting in poor temperature uniformity. This, in turn, affects the balanced heat exchange of the battery cells, impacting the performance and lifespan of the battery device.

[0085] Therefore, this application provides a battery device in which the cross-sectional area of ​​the refrigerant heat exchange channel inside the refrigerant heat exchange component is equal to the cross-sectional area in the non-functional area. This makes the flow resistance of the refrigerant in the refrigerant heat exchange channel relatively stable when the refrigerant flows from the non-functional area into the functional area, and less prone to drastic fluctuations. This helps to reduce pressure loss (i.e., pressure drop), thereby reducing the temperature difference between the inlet and outlet of the refrigerant heat exchange channel. This makes the temperature distribution on the refrigerant heat exchange component more uniform, improves the temperature uniformity performance, and thus enhances the effect of the refrigerant heat exchange component on the balanced heat exchange of the battery cell assembly.

[0086] Specifically, refer to Figure 2 As shown in the illustration, this application 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.

[0087] 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.

[0088] 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.

[0089] Please refer to Figure 1 , Figure 1 This is a schematic diagram of the structure of a vehicle 1000 provided in some embodiments of this application. The vehicle 1000 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. A battery 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 starting, navigation, and driving.

[0090] 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.

[0091] Please refer to Figure 2 As shown, Figure 2This 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 battery cells 1112 are 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 into 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.

[0092] 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.

[0093] According to some embodiments of this application, refer to Figure 2-5 , Figure 7 , Figure 17 and Figure 18 As shown, this application embodiment provides a battery device 1100, which includes a battery cell assembly 1110 and a refrigerant heat exchange component 1140. The refrigerant heat exchange component 1140 is configured to exchange heat with the battery cell assembly 1110. The refrigerant heat exchange component 1140 includes a functional area 1160 and a non-functional area 1170. The refrigerant heat exchange component 1140 has a refrigerant heat exchange channel 1144 inside. The functional area 1160 at least coincides with the projection of the battery cell assembly 1110. The cross-sectional area of ​​the refrigerant heat exchange channel 1144 in the functional area 1160 is equal to the cross-sectional area in the non-functional area 1170.

[0094] Specifically, the battery cell assembly 1110 includes one or more battery cells 1112. The refrigerant heat exchange component 1140 needs to exchange heat with the battery cell assembly 1110. Therefore, the refrigerant heat exchange component 1140 needs to be located close to the battery cell assembly 1110, or the refrigerant heat exchange component 1140 needs to directly contact or abut against the battery cell assembly 1110 to improve the heat exchange effect. When the refrigerant heat exchange component 1140 exchanges heat with the battery cell assembly 1110, a large heat exchange area needs to be formed between the refrigerant heat exchange component 1140 and the battery cell 1112 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 will be formed on the refrigerant heat exchange component 1140.

[0095] 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. In this embodiment, the heat exchange surface 1143 of the refrigerant heat exchange 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 refrigerant heat exchange 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 refrigerant heat exchange 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.

[0096] For ease of explanation, the following embodiments are illustrated by taking a battery device 1100 of this application as an example, in which the refrigerant heat exchange component 1140 is located at the bottom of the battery cell assembly 1110.

[0097] For the refrigerant heat exchange channel 1144 inside the refrigerant heat exchange component 1140, refer to Figure 4 and Figure 5 As shown, the refrigerant heat exchange channel 1144 can be a hole structure inside the refrigerant heat exchange component 1140. For example, the refrigerant heat exchange 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 refrigerant heat exchange component 1140. The through hole structure or cavity structure forms the refrigerant heat exchange channel 1144. The refrigerant heat exchange component 1140 can be integrally molded, and the refrigerant heat exchange channel 1144 can be manufactured using gas-assisted or water-assisted molding. Alternatively, the refrigerant heat exchange component 1140 can also be assembled. For example, the refrigerant heat exchange component 1140 includes a first sub-component 1141 and a second sub-component 1142. A groove structure with a preset extension length and shape is formed on the second sub-component 1142. The groove structure can be manufactured by stamping. The first sub-component 1141 and the second sub-component 1142 are fixedly or detachably connected, and the groove opening is closed to form a through-hole structure or a cavity structure, which forms the refrigerant heat exchange channel 1144. The refrigerant heat exchange channel 1144 should be located close to the heat exchange surface 1143, and the extension path of the refrigerant heat exchange channel 1144 can be parallel to the heat exchange surface 1143 to increase the heat exchange effect.

[0098] For example, the first sub-component 1141 can be an upper plate, and the second sub-component 1142 can be a lower plate. The refrigerant 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.

[0099] Generally, the refrigerant heat exchange component 1140 has a functional area 1160 and a non-functional area 1170. The functional area 1160 is mainly used for heat exchange with the battery cell assembly 1110, while the non-functional area 1170 can be used to divert the heat exchange refrigerant. Refrigerant heat exchange channels 1144 are distributed in both the functional area 1160 and the non-functional area 1170.

[0100] The cross-sectional area of ​​the refrigerant heat exchange channel 1144 refers to the area of ​​the flow cross section of a single channel. For example, the refrigerant heat exchange channel 1144 has only one independent first channel in the non-functional area 1170, and the refrigerant heat exchange channel 1144 also has only one independent second channel in the functional area 1160. Therefore, the cross-sectional area of ​​the refrigerant heat exchange channel 1144 in the functional area 1160 is equal to the cross-sectional area in the non-functional area 1170. This should be understood as the cross-sectional area of ​​the first channel being equal to the cross-sectional area of ​​the second channel. When the cross-sections of both the first and second channels are circular, the cross-sectional area of ​​the first channel being equal to the cross-sectional area of ​​the second channel can also be understood as the diameter of the first channel being equal to the diameter of the second channel.

[0101] Of course, it should be further explained that in the non-functional area 1170, the refrigerant heat exchange channel 1144 may include multiple of the above-mentioned first channels in terms of structural form. In the functional area 1160, the refrigerant heat exchange channel 1144 may include multiple of the above-mentioned second channels in terms of structural form. The cross-sectional area of ​​the refrigerant heat exchange channel 1144 in the functional area 1160 is equal to the cross-sectional area in the non-functional area 1170. This should be understood as the cross-sectional area of ​​each first channel being equal to the cross-sectional area of ​​each second channel. When the cross-sections of the first channel and the second channel are both circular, the cross-sectional area of ​​the first channel being equal to the cross-sectional area of ​​the second channel can also be understood as the diameter of each first channel being equal to the diameter of each second channel.

[0102] The aforementioned design of the cross-sectional area of ​​the refrigerant heat exchange channel 1144 ensures that the cross-sectional area of ​​each channel remains the same when the heat exchange refrigerant flows through the functional zone 1160 and the non-functional zone 1170. This ensures that the cross-sectional areas of the channels in each part of the refrigerant heat exchange channel 1144 are consistent, thereby maintaining the consistency of the flow resistance in each part of the refrigerant heat exchange channel 1144. This makes the influence of the refrigerant heat exchange channel 1144 on the flow resistance of the heat exchange refrigerant relatively stable, and the flow resistance is less likely to fluctuate drastically. This helps to reduce pressure loss (i.e., pressure drop), thereby reducing the pressure difference between the outlet and inlet positions of the refrigerant heat exchange channel 1144, which in turn helps to reduce the temperature difference between the inlet and outlet of the refrigerant heat exchange channel 1144.

[0103] In this embodiment, by making the cross-sectional areas of the refrigerant heat exchange channels 1144 in the functional area 1160 and the non-functional area 1170 equal, it is beneficial to improve the flow resistance change during the heat exchange refrigerant flow process and reduce the flow resistance. The flow resistance is less likely to fluctuate drastically, which helps to reduce pressure loss (i.e., pressure drop). This, in turn, reduces the temperature difference between the inlet and outlet of the refrigerant heat exchange channel 1144, resulting in a more uniform temperature distribution on the refrigerant heat exchange component and improved temperature uniformity performance. This, in turn, enhances the effect of the refrigerant heat exchange component on the balanced heat exchange of the battery cell assembly.

[0104] In some embodiments, the width of the refrigerant heat exchange channel 1144 is greater than or equal to 6 mm and less than or equal to 15 mm.

[0105] Specifically, the refrigerant heat exchange channel 1144 may include one or more independent or interconnected channels. The width of the refrigerant heat exchange channel 1144 is greater than or equal to 6 mm and less than or equal to 15 mm, meaning that the width of a channel is greater than or equal to 6 mm and less than or equal to 15 mm. For example, the width of the first channel and the second channel mentioned above is both greater than or equal to 6 mm and less than or equal to 15 mm.

[0106] Since the cross-sectional shape of the refrigerant heat exchange channel 1144 can be various shapes, such as circular, elliptical, and polygonal, for example, if the cross-sectional shape of the refrigerant heat exchange channel 1144 is circular, then the width of the refrigerant heat exchange channel 1144 is greater than or equal to 6 mm and less than or equal to 15 mm, and the diameter of the refrigerant heat exchange channel 1144 is greater than or equal to 6 mm and less than or equal to 15 mm; as another example, if the cross-sectional shape of the refrigerant heat exchange channel 1144 is elliptical, then the width of the refrigerant heat exchange channel 1144 is greater than or equal to 6 mm and less than or equal to 15 mm, and the length of the major or minor axis of the refrigerant heat exchange channel 1144 is greater than or equal to 6 mm and less than or equal to 15 mm; as yet another example, if the cross-sectional shape of the refrigerant heat exchange channel 1144 is rectangular, then the width of the refrigerant heat exchange channel 1144 is greater than or equal to 6 mm and less than or equal to 15 mm, and the length or width of the rectangle is greater than or equal to 6 mm and less than or equal to 15 mm.

[0107] In addition, the refrigerant heat exchange component 1140 generally has a heat exchange surface 1143. The heat exchange surface 1143 should be opposite to and close to the battery cell assembly 1110. The extension trajectory of the refrigerant heat exchange channel 1144 should be arranged along a plane parallel to the heat exchange surface 1143. Therefore, the width of the refrigerant heat exchange channel 1144 can generally be understood as the maximum cross-sectional width of the refrigerant heat exchange channel 1144 in the plane parallel to the heat exchange surface 1143.

[0108] If the width of the refrigerant 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 width of the refrigerant heat exchange channel 1144 is too wide, it may cause the refrigerant flow rate to be too slow, and the heat may not be carried away in time.

[0109] In this embodiment, the width of the refrigerant heat exchange channel 1144 is set to 6-15mm. This width range ensures that the refrigerant circulates under reasonable flow resistance, pressure drop and flow rate, thus ensuring the stable operation of the thermal management system of the entire battery device.

[0110] In some embodiments, the width of the refrigerant heat exchange channel 1144 is greater than or equal to 6 mm and less than or equal to 10 mm.

[0111] Similarly, referring to the above embodiments, if the width of the refrigerant heat exchange channel 1144 is too large or too small, it will affect the heat exchange of the refrigerant heat exchange component 1140 to the battery cell assembly 1110. Therefore, after a large number of tests, the width range of the refrigerant heat exchange channel 1144 is 6-10mm, so that the width data of the refrigerant heat exchange channel 1144 is more accurate.

[0112] In this embodiment, a width range of 6-10 mm can improve the heat exchange performance of the refrigerant heat exchange component 1140 while also taking into account the structural strength of the refrigerant heat exchange component 1140. This ensures that the refrigerant heat exchange component 1140 will not weaken its strength due to an excessively wide refrigerant heat exchange channel 1144, thus achieving a balance between the heat exchange performance and structural strength of the refrigerant heat exchange component 1140.

[0113] In some embodiments, the refrigerant heat exchange channel 1144 is filled with a phase change medium.

[0114] Specifically, a phase change medium is a substance capable of undergoing 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 refrigerant 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.

[0115] 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.

[0116] In this embodiment, filling the refrigerant heat exchange channel 1144 with a phase change medium is beneficial to improving heat exchange efficiency and enhancing the performance stability of the battery device 1100.

[0117] In some embodiments, the refrigerant heat exchange component 1140 is formed from one or more of metals and non-metals.

[0118] Specifically, metallic materials, such as copper and aluminum, possess excellent thermal conductivity, enabling rapid heat transfer and allowing the refrigerant heat exchange 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 refrigerant heat exchange component 1140 maintains high-efficiency thermal conductivity across different operating temperature ranges and heat load conditions, thereby enhancing the overall performance of the battery thermal management system.

[0119] In this embodiment, the material selection of the refrigerant heat exchange 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 refrigerant heat exchange component 1140 can maintain efficient heat conduction capability and improve the overall performance of the battery thermal management system.

[0120] In some embodiments, refer to Figure 2-9 As shown, the refrigerant heat exchange channel 1144 includes a functional zone channel 1146 and a non-functional zone channel 1147 that are connected to each other. The functional zone channel 1146 forms a functional zone, and the non-functional zone channel 1147 forms a non-functional zone. The functional zone channel 1146 and the non-functional zone channel 1147 are configured to be located on both sides of a first direction. The cross-sectional area of ​​the functional zone channel 1146 is equal to the cross-sectional area of ​​the non-functional zone channel 1147.

[0121] The refrigerant heat exchange channel 1144 has a heat exchange surface 1143. In the functional area 1160, the functional area channel 1146 correspondingly forms the heat exchange surface 1143 on the refrigerant heat exchange component 1140. The heat exchange surface can be a portion of one side of the plate-shaped refrigerant heat exchange component 1140. The first direction X should be understood as any direction parallel to the heat exchange surface 1143. For example, if the heat exchange surface 1143 has a length direction or a width direction, then the first direction X can refer to the length direction or width direction parallel to the heat exchange surface 1143.

[0122] Since the refrigerant heat exchange channel 1144 in functional area 1160 is mainly used for heat exchange with the battery cell assembly 1110, it is defined as functional area channel 1146. Since the refrigerant heat exchange channel 1144 in non-functional area 1170 is mainly used for distributing and allocating the refrigerant to the functional area channel 1146, it is defined as non-functional area channel 1147. Functional area channel 1146 and non-functional area channel 1147 should be connected and configured together.

[0123] The two sides of the first direction refer to the fact that there is an extension axis along the first direction. The two sides are the two sides of the extension axis. That is to say, on the refrigerant heat exchange component 1140, a non-functional area flow channel 1147 is distributed on one side of the extension axis, and a functional area flow channel 1146 is distributed on the other side of the extension axis. The functional area flow channel 1146 and the non-functional area flow channel 1147 are connected and configured at the position of the extension axis.

[0124] In this example, the cross-sectional area of ​​the refrigerant heat exchange channel 1144 in the functional area is equal to its cross-sectional area in the non-functional area. This should be understood as the cross-sectional area of ​​the functional area channel 1146 being equal to the cross-sectional area of ​​the non-functional area channel 1147. Furthermore, the functional area channel 1146 may include multiple independent or interconnected channels, such as a first channel, and the non-functional area channel 1147 may include multiple independent or interconnected channels, such as a second channel. Therefore, it is understood that the cross-sectional area of ​​each first channel should be equal to the cross-sectional area of ​​each second channel.

[0125] In this embodiment, the functional area flow channel 1146 and the non-functional area flow channel 1147 are set in separate areas, which helps to improve the rationality of the flow channel arrangement and enables the functional area flow channel 1146 to better exchange heat with the battery cell assembly 1110.

[0126] In some embodiments, refer to Figure 2-9As shown, the functional area flow channel 1146 includes an upstream flow channel 11442 and a downstream flow channel 11443 that are connected to each other, and the non-functional area flow channel 1147 includes an inlet branch flow channel 1148 and a loop branch flow channel 1149. The inlet branch flow channel 1148 is connected to the upstream flow channel 11442, and the loop branch flow channel 1149 is connected to the downstream flow channel 11443. The cross-sectional areas of the upstream flow channel 11442, the downstream flow channel 11443, the inlet branch flow channel 1148, and the loop branch flow channel 1149 are all equal.

[0127] The upstream flow channel 11442 and the downstream flow channel 11443 can each be understood as an independent channel on the refrigerant heat exchange component 1140 corresponding to a functional area. For example, the upstream flow channel 11442 and the downstream flow channel 11443 can be understood as the two first channels mentioned above. The inlet branch flow channel 1148 and the loop branch flow channel 1149 can each be understood as an independent channel on the refrigerant heat exchange component 1140 corresponding to a non-functional area. For example, the inlet branch flow channel 1148 and the loop branch flow channel 1149 can be understood as the two second channels mentioned above.

[0128] Since the functional area is mainly used for heat exchange with the battery cell module 1110, it can be seen that the main function of the upstream flow channel 11442 and the downstream flow channel 11443 is to exchange heat with the battery cell module 1110. Because the heat exchange medium is a refrigerant, the refrigerant heat exchange component 1140 adopts a direct cooling heat exchange method. The heat exchange process of the refrigerant heat exchange component 1140 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 refrigerant and a large phase change heat, resulting in a strong heat exchange capacity for the battery cell module 1110. The refrigerant then enters the downstream flow channel 11443 from the upstream flow channel 11442. In the downstream flow channel 11443, the refrigerant will partially or completely vaporize, leading to a decrease in its heat exchange capacity for the battery cell module 1110. Furthermore, as the heat exchange refrigerant moves from the upstream channel 11442 into the downstream channel 11443, its volume gradually increases due to vaporization.

[0129] Therefore, considering the changes in heat exchange capacity and volume of the heat exchange refrigerant during the process from the upstream flow channel 11442 to the downstream flow channel 11443, the cross-sectional areas of the upstream flow channel 11442 and the downstream flow channel 11443 should be equal. This helps to reduce the change in flow resistance of the heat exchange refrigerant during the process of entering the downstream flow channel 11443 from the upstream flow channel 11442, and also helps to reduce the flow resistance, thereby reducing pressure loss. This, in turn, reduces the temperature difference between the inlet of the heat exchange refrigerant in the upstream flow channel 11442 and the outlet of the downstream flow channel 11443, resulting in a more uniform temperature distribution in the corresponding functional areas of the refrigerant heat exchange component, improved temperature uniformity, and thus enhanced effect of the refrigerant heat exchange component on the balanced heat exchange of the battery cell module.

[0130] As for the non-functional area flow channel 1147, the non-functional area flow channel 1147 includes an inlet branch flow channel 1148 and a loop branch flow channel 1149. The inlet branch flow channel 1148 is connected to the upstream flow channel 11442. It can be seen that the inlet branch flow channel 1148 is mainly used to input heat exchange refrigerant into the upstream flow channel 11442. The inlet branch flow channel 1148 may include multiple flow channel branches (such as multiple second channels), so that each flow channel branch is connected to each upstream flow channel 11442 in a one-to-one correspondence. This makes the heat exchange refrigerant entering each upstream flow channel 11442 more uniform, which is beneficial to improving the temperature distribution uniformity on the refrigerant heat exchange component 1140. The loop diversion channel 1149 is connected to the outlet of the downstream channel 11443, guiding the heat exchange refrigerant flowing out of the downstream channel 11443 to the outlet position of the refrigerant heat exchange component 1140, thus guiding the heat exchange refrigerant in the non-functional area.

[0131] Since the heat exchange refrigerant undergoes varying degrees of volume change during its journey from the inlet branch channel 1148 into the upstream channel 11442 and from the downstream channel 11443 into the loop branch channel 1149, the cross-sectional area of ​​the inlet branch channel 1148 is made equal to that of the upstream channel 11442, and the cross-sectional area of ​​the loop branch channel 1149 is made equal to that of the downstream channel 11443, taking into account the impact of the volume change on flow resistance. This means that the cross-sectional areas of the upstream channel 11442, the downstream channel 11443, the inlet branch channel 1148, and the loop branch channel 1149 are all equal, which helps to improve the flow resistance problem within the entire refrigerant heat exchange channel 1144.

[0132] In this embodiment, the cross-sectional areas of the upstream flow channel 11442, the downstream flow channel 11443, the inlet branch flow channel 1148, and the loop branch flow channel 1149 are all equal, which helps to improve flow resistance and reduce pressure loss. This reduces the pressure difference between the outlet and inlet of the refrigerant heat exchange channel 1144, thereby reducing the temperature difference between the inlet and outlet of the refrigerant heat exchange channel 1144. As a result, the temperature distribution on the refrigerant heat exchange component 1140 is more uniform, the temperature uniformity is improved, and the effect of the refrigerant heat exchange component 1140 on the balanced heat exchange of the battery cell assembly 1110 is enhanced.

[0133] In some embodiments, refer to Figure 2-5 As shown, the functional area flow channel 1146 includes multiple heat exchange sub-flow channels 11441 arranged in parallel. Each heat exchange sub-flow channel 11441 includes an upstream flow channel 11442 and a downstream flow channel 11443. The upstream flow channel 11442 in some heat exchange sub-flow channels 11441 is adjacent to and thermally compatible with the downstream flow channel 11443 in the adjacent heat exchange sub-flow channel 11441. The downstream flow channel 11443 in some heat exchange sub-flow channels 11441 is adjacent to and thermally compatible with the upstream flow channel 11442 in the adjacent heat exchange sub-flow channel 11441.

[0134] Reference Figure 5 and Figure 7 As shown, the functional area flow channel 1146 includes multiple heat exchange sub-flow channels 11441. Each heat exchange sub-flow channel 11441 forms a heat exchange loop. That is, each heat exchange sub-flow channel 11441 has a heat exchange inlet and a heat exchange outlet. In each heat exchange sub-flow channel 11441, the upstream flow channel 11442 is connected to the downstream flow channel 11443. The end of the upstream flow channel 11442 away from the downstream flow channel 11443 forms the heat exchange inlet, and the end of the downstream flow channel 11443 away from the upstream flow channel 11442 forms the heat exchange outlet. Thus, the heat exchange medium enters the upstream flow channel 11442 from the heat exchange inlet, then flows to the downstream flow channel 11443, and then flows out from the heat exchange outlet, forming a circulating heat exchange.

[0135] Assuming that the downstream flow channel 11443 of the multiple heat exchange sub-flow channels 11441 are centrally arranged, the refrigerant heat exchange 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.

[0136] 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 refrigerant 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 11441. In channel 11441, the upstream channel 11442 is adjacent and thermally coordinated. That is, the upstream channel 11442 and the downstream channel 11443 in two adjacent heat exchange sub-channels 11441 are configured adjacently. Adjacent means that the upstream channel 11442 and the downstream channel 11443 are directly connected in space (without gap) or have only a very small gap. Thermally coordinated means that the adjacent upstream channel 11442 and the downstream channel 11443 can conduct heat (or exchange heat). It can also be understood that, due to the adjacent configuration of the upstream channel 11442 and the downstream channel 11443, the area on the heat exchange surface 1143 corresponding to the upstream channel 11442 and the area on the heat exchange surface 1143 corresponding to the downstream channel 11443 can conduct heat (or exchange heat).

[0137] 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, thereby reducing the temperature difference on the heat exchange surface 1143 of the refrigerant heat exchange component 1140. Therefore, it can be seen that the temperature of the region on the heat exchange surface 1143 corresponding to the downstream flow channel 11443 adjacent to the upstream flow channel 11442 is less likely to rise excessively, and the temperature is relatively lower, thus preventing the formation of an overheated zone and making the temperature distribution on the heat exchange surface 1143 more uniform. Therefore, the upstream flow channel 11442 and the downstream flow channel 11443 in the two adjacent heat exchange sub-flow channels 11441 form a first uniform temperature region B on the heat exchange surface 1143. Figure 11 As shown, the temperature distribution in the first uniform temperature region B is more balanced.

[0138] 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.

[0139] The battery cell assembly 1110 can directly contact the heat exchange surface 1143 of the refrigerant heat exchange 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 refrigerant heat exchange 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.

[0140] Combination Figure 16 The temperature distribution diagram of the refrigerant heat exchange channel 1144 clearly shows that the temperature of the downstream channel 11443, which is adjacent to the upstream channel 11442, is significantly balanced. Figure 16 In this context, the larger the number, the higher the temperature; the size of the number reflects the temperature level.

[0141] In this embodiment, the upstream flow channel 11442 and the downstream flow channel 11443 of the two heat exchange sub-channels 11441 are arranged adjacent to each other. 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 refrigerant heat exchange component 1140 more uniform, thereby improving the heat exchange uniformity of the battery cell module 1110.

[0142] In some embodiments, refer to Figure 5 and Figure 6 As shown, multiple heat exchange sub-channels 11441 are arranged sequentially along the first direction. The upstream channel 11442 and the downstream channel 11443 in the heat exchange sub-channels 11441 are both extended along the second direction, and the second direction Y is perpendicular to the first direction X.

[0143] 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.

[0144] Specifically, the first direction X is parallel to the heat exchange surface 1143. Taking the refrigerant heat exchange component 1140 as a plate as an example, the heat exchange surface 1143 can be formed on one side of the plate of the refrigerant heat exchange 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.

[0145] 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.

[0146] In some embodiments, refer to Figure 7 , Figure 8 and Figure 14 As shown, the inlet diversion channel 1148 includes a first diversion channel 11446 and a plurality of second diversion channels 11447. The first diversion channel 11446 extends along a first direction X, and each of the second diversion channels 11447 extends along a second direction Y. One extension end of each of the second diversion channels 11447 is connected to the first diversion channel 11446, and the other extension end of each of the second diversion channels 11447 is connected to each of the upstream channels 11442 respectively. The second direction Y is perpendicular to the first direction X. The cross-sectional areas of the first diversion channel 11446 and the second diversion channel 11447 are the same as the cross-sectional area of ​​the upstream channel 11442.

[0147] Specifically, the first branch channel 11446 and each of the second branch channels 11447 are connected and configured. 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 its 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 (or the surface of the refrigerant heat exchange component 1140).

[0148] 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 extension length direction 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. This also 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.

[0149] 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.

[0150] The first and second branch channels 11446 and 11447 can also be understood as part of the inlet channel 11444 described below. The heat exchange medium (i.e., the heat exchange refrigerant) enters the refrigerant heat exchange component 1140. The purpose is to reduce the temperature difference problem of the refrigerant heat exchange 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 is the smallest when the heat exchange medium enters the refrigerant heat exchange 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 uniform temperature 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 uniform temperature performance of the refrigerant heat exchange 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 on the refrigerant heat exchange component 1140 (or heat exchange surface 1143) and improving the temperature uniformity performance of the refrigerant heat exchange component 1140.

[0151] The cross-sectional areas of the first branch channel 11446 and the second branch channel 11447 are equal to the cross-sectional area of ​​the upstream channel 11442. In other words, the cross-sectional areas of the upstream channel 11442, the downstream channel 11443, the first branch channel 11446, and the second branch channel 11447 are all equal. This helps to reduce the flow resistance of the heat exchange refrigerant during the process of the heat exchange refrigerant entering the second branch channel 11447 from the first branch channel 11446 and during the process of the heat exchange refrigerant entering the upstream channel 11442 from the second branch channel 11447.

[0152] In this embodiment, the first branch channel 11446 and the second branch channel 11447 are connected, and the first branch channel 11446 extends along the first direction X to be consistent with the arrangement direction of each heat exchange sub-channel 11441, which is beneficial to improving the smoothness of heat exchange medium flow. Each second branch channel 11447 is perpendicular to the first branch channel 11446, and each second branch channel 11447 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.

[0153] In some embodiments, refer to Figure 6 and Figure 7 As shown, the non-functional area flow channel 1147 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 through an inlet branch flow channel 1148, and the outlet flow channel 11445 is connected to multiple downstream flow channels 11443 through a loop branch flow channel 1149. The cross-sectional areas of the upstream flow channel 11442, the downstream flow channel 11443, the inlet branch flow channel 1148, the loop branch flow channel 1149, the inlet flow channel 11444, and the outlet flow channel 11445 are all equal.

[0154] Specifically, the inlet channel 11444 is the inlet for the heat exchange medium to enter the refrigerant heat exchange component 1140. One or more inlet channels 11444 can be provided. One inlet channel 11444 can be connected to multiple upstream channels 11442 through the inlet branch channels 1148. If the inlets of each upstream channel 11442 are called sub-inlets 114421, then after the heat exchange medium enters the inlet channel 11444, it will form multiple branches that connect to multiple sub-inlets 114421. These multiple branches can be understood as multiple inlet branch channels 1148. The cross-sectional area of ​​the inlet channel 11444 is equal to the cross-sectional area of ​​the inlet branch channels 1148 and equal to the cross-sectional area of ​​the upstream channels 11442. This helps to reduce the flow resistance of the heat exchange refrigerant during the process of entering the inlet branch channels 11448 from the inlet channel 11444.

[0155] Similarly, outlet channel 11445 is the outlet for the heat exchange medium to flow out to the outside of the refrigerant heat exchange component 1140. One or more outlet channels 11445 can be provided. One outlet channel 11445 can be connected to multiple downstream channels 11443 through loop branch channels 1149. If the outlets of each downstream channel 11443 are called sub-outlets 114431, then it can be understood that after the heat exchange medium flows out of the sub-outlets 114431, it will connect to the outlet channel 11445 through multiple branches. These multiple branches can be understood as multiple loop branch channels 1149. The cross-sectional area of ​​the outlet channel 11445 is equal to the cross-sectional area of ​​the loop branch channels 1149 and equal to the cross-sectional area of ​​the downstream channels 11443. This helps to reduce the flow resistance of the heat exchange refrigerant during the process of entering the loop branch channels 1149.

[0156] 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 refrigerant heat exchange component 1140).

[0157] In some embodiments, refer to Figure 8 , Figure 9 and Figure 15 As shown, the inlet channel 11444 and the outlet channel 11445 are arranged adjacent to each other.

[0158] 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 heat exchange component 1140 (specifically the heat exchange surface 1143).

[0159] 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.

[0160] In some embodiments, refer to Figure 7 and Figure 8As shown, along the first direction X, the inlet channel 11444 and the outlet channel 11445 are located on the same side; the functional area channel 1146 also includes a loop guide channel 11448, and each downstream channel 11443 has a sub-outlet 114431 on the side away from the inlet channel 11444. The outlet channel 11445 is connected to each sub-outlet 114431 via the loop branch channel 1149 and the loop guide channel 11448; along the first direction X, the loop guide channel 11448 is located at one or both ends of the functional area channel 1146.

[0161] 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.

[0162] The loop guide channel 11448 is a connecting channel or passage 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 both ends of the functional area channel 1146 along the first direction X, that is, loop guide channels 11448 are arranged at the beginning and end positions of the functional area channel 1146.

[0163] Each downstream channel 11443 has a sub-outlet 114431, which is located on the side of the downstream channel 11443 away from the inlet 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 channel 11448, so that the fluid flows from the edge of the heat exchange surface 1143 along the first direction X and then through the loop branch channel 1149 into the outlet channel 11445.

[0164] 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 region corresponding to the heat exchange surface 1143 of the loop guide channel 11448 is higher than the temperature 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. Combined with... Figure 16The temperature distribution diagram of the refrigerant heat exchange channel 1144 clearly shows that the temperature of the downstream channel 11443, which is adjacent to the upstream channel 11442, is significantly balanced. Furthermore, the temperature of the overheated area (i.e., edge area A) corresponding to the loop guide channel 11448 is also relatively balanced, making it less prone to overheating.

[0165] 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.

[0166] In some embodiments, refer to Figure 5 , Figure 7-9 As shown, the loop guide channel 11448 includes a plurality of guide sub-channels 11449 extending and connected along the second direction Y, and the plurality of guide sub-channels 11449 are connected between the loop branch channel 1149 and each sub-outlet 114431.

[0167] 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 loop branch channel 1149 and each sub-outlet 114431, so as to improve the flow efficiency and reduce the accumulation and blockage of heat exchange medium.

[0168] 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 refrigerant heat exchange 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 refrigerant heat exchange component 1140 more uniform, which is conducive to improving balanced heat dissipation.

[0169] In this embodiment, by setting multiple guide channels 11449 extending along the second direction Y, the recirculation of the refrigerant heat exchange channel 1144 becomes smoother, which is conducive to improving the space utilization rate within the refrigerant heat exchange component 1140 and making the layout of the refrigerant heat exchange channel 1144 more reasonable.

[0170] In some embodiments, refer to Figure 7As shown, 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 two adjacent upstream channels 11442 have a second interval distance L2; each heat exchange sub-channel 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.

[0171] 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.

[0172] 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.

[0173] 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.

[0174] In some embodiments, refer to Figure 6 , Figure 8-10 and Figure 16 As shown, an edge region A is formed on the surface of the refrigerant heat exchange component 1140 near the edge, and the loop guide channel 11448 is configured corresponding to the edge region A.

[0175] Specifically, taking the refrigerant heat exchange component 1140 as a flat plate as an example, the refrigerant heat exchange component 1140 has two opposing surfaces, one of which forms a heat exchange surface 1143. Therefore, 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 refrigerant heat exchange channel 1144, therefore, referring to... Figure 8 and Figure 9 As shown, only one or two edge regions A near the edge positions at both ends of the heat exchange surface 1143 of the refrigerant heat exchange component 1140 are studied on the surface of the heat exchange surface 1143 of the refrigerant heat exchange component 1140. It can be considered that the surface of the heat exchange surface 1143 of the refrigerant heat exchange component 1140 has one edge region A or two edge regions A.

[0176] The loop guide channel 11448 is located inside the refrigerant heat exchange component 1140 and is disposed opposite to the surface of the heat exchange surface 1143 of the refrigerant heat exchange 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.

[0177] The loop guide channel 11448 corresponds to a region on the surface of the refrigerant heat exchange component 1140 with a high temperature. It can be observed that in the battery cell assembly 1110, the temperature of the battery cell assembly 1110 near the edge of the refrigerant heat exchange component 1140 and near the side wall of the housing assembly 1120 is lower than the temperature 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 refrigerant heat exchange component 1140 and the battery cell assembly 1110. Combined with... Figure 16 As shown, 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.

[0178] In this embodiment, the edge region A of the refrigerant heat exchange component 1140 is made to correspond to the loop guide channel 11448, which can 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.

[0179] In some embodiments, refer to Figure 6 As shown, edge region A is configured to avoid battery cell assembly 1110.

[0180] 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.

[0181] 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.

[0182] In some embodiments, refer to Figure 9 , Figure 12 and Figure 13 As shown, the refrigerant heat exchange component 1140 has a heat exchange surface 1143, which has a first region D and a second region C. In the 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.

[0183] 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.

[0184] 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.

[0185] 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.

[0186] 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.

[0187] 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.

[0188] In some embodiments, refer to Figure 7-9As shown, the refrigerant heat exchange channels 1144 in the functional area are arranged symmetrically.

[0189] Specifically, the functional area of ​​the refrigerant heat exchange component 1140 is set to have a symmetry plane 1145, and the refrigerant heat exchange channels 1144 of the functional area are symmetrically arranged on both sides of the symmetry plane 1145. That is to say, the functional area channels 1146 are symmetrically arranged about the symmetry plane 1145.

[0190] 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.

[0191] The functional area flow channel 1146 is divided into two parts, so that the two parts 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 functional area flow channel 1146 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.

[0192] In this embodiment, by designing symmetrically arranged functional area flow channels 1146, it is beneficial to improve the balanced heat dissipation of the refrigerant heat exchange component 1140 to the battery cell assembly 1110.

[0193] In some embodiments, refer to Figure 5 and Figure 6 As shown, the battery cell assembly 1110 includes a plurality of battery cell modules 1111 arranged along the first direction X, and each battery cell module 1111 includes a plurality of battery cells 1112 arranged along the second direction Y.

[0194] 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 uniformity of the refrigerant heat exchange channel 1144 to the battery cell assembly 1110.

[0195] In this embodiment, the arrangement of the battery cell assembly 1110 matches the arrangement of the refrigerant heat exchange channel 1144, which helps to improve the uniformity of heat exchange between the refrigerant heat exchange channel 1144 and the battery cell assembly 1110.

[0196] In some embodiments, refer to Figure 2 As shown, the refrigerant heat exchange component 1140 also includes a housing assembly 1120, which has a receiving cavity 1133. The refrigerant heat exchange component 1140 is located in the receiving cavity 1133 and is disposed on the bottom 11222 of the housing assembly 1120 to support the battery cell assembly 1110.

[0197] 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.

[0198] Generally, when the battery pack 1100 is placed horizontally, the bottom plate of the box is also horizontal, and the refrigerant heat exchange component 1140 can be placed on the bottom plate. At this time, the refrigerant heat exchange component 1140 can be plate-shaped, and the upper surface of the refrigerant heat exchange 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 refrigerant heat exchange component 1140 can also support and support the battery cell assembly 1110.

[0199] In this embodiment, the refrigerant heat exchange component 1140 is placed on the bottom 11222 of the housing assembly 1120, thereby realizing bottom heat exchange of the battery cell assembly 1110. The heat exchange area is large, which is beneficial to improving heat exchange efficiency.

[0200] In some embodiments, refer to Figure 3 As shown, the refrigerant heat exchange component 1140 includes a housing body 1130. The refrigerant heat exchange component 1140 is connected to the housing body 1130 and together with the housing body 1130 forms a receiving cavity 1133. The battery cell assembly 1110 is housed in the receiving cavity 1133. The refrigerant heat exchange component 1140 can be used to support the battery cell assembly 1110.

[0201] Specifically, the housing body 1130 may include a cover 1131 and a frame 1132, which cover each other. The cover 1131, frame 1132, and refrigerant heat exchange 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 refrigerant heat exchange component 1140 is connected to the other open side of the frame 1132. The cover 1131 may be disposed opposite to the refrigerant heat exchange component 1140. The housing body 1130 may have various shapes, such as a cylinder or a cuboid.

[0202] The refrigerant heat exchange component 1140 can be connected to the box body 1130. The refrigerant heat exchange 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.

[0203] 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.

[0204] In this embodiment, the refrigerant heat exchange component 1140 can be connected to the box body 1130. The refrigerant heat exchange 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.

[0205] In some embodiments, refer to Figure 2-9As shown, the battery device 1100 also includes a connector component 1150, which is connected to the refrigerant heat exchange component 1140 and communicates with the refrigerant heat exchange channel 1144.

[0206] Specifically, 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 then connected to the sub-inlet 114421 of each upstream flow channel 11442 through the inlet branch flow channel 1148. The flow channel outlet is connected to each outlet flow channel 11445 and then connected to the sub-outlet 114431 of each downstream flow channel 11443 through the loop branch flow channel 1149. The connector component 1150 can be connected to the refrigerant heat exchange component 1140 by welding, or the connector component 1150 can also be connected to the refrigerant heat exchange 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 is disposed near the edge of the heat exchange surface 1143.

[0207] 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.

[0208] According to some embodiments of this application, this application also provides a refrigerant heat exchange device, which includes the refrigerant heat exchange component 1140 in the battery device 1100 in any of the above embodiments.

[0209] The example of the refrigerant heat exchange device in this application is based on the example of the battery device 1100 described above. The structure of the refrigerant heat exchange component 1140 in the example of the battery device 1100 is the same as that of the refrigerant heat exchange component 1140 in this example, and the technical effects are the same. It will not be described again here. For details, please refer to the description of the battery device 1100 described above.

[0210] According to some embodiments of this application, this application also provides an energy storage device, which includes a power conversion device and the energy storage device in the above embodiments. The power conversion device is used to electrically connect the power generation device and the energy storage device.

[0211] 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.

[0212] 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.

[0213] In some embodiments, the energy storage device is an energy storage container or an energy storage cabinet.

[0214] In some embodiments, the energy storage device may include a cabinet and one or more battery clusters housed within the cabinet.

[0215] 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.

[0216] 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.

[0217] 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.

[0218] 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.

[0219] 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.

[0220] As an example, a power distribution module can be used to distribute power to modules in an energy storage device that require electricity.

[0221] 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.

[0222] 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, hydroelectric power generation device, thermal power generation device, wind power generation device, etc. The specific type of power generation device is not limited in this application.

[0223] According to some embodiments of this application, refer to Figure 1 As shown, 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.

[0224] 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.

[0225] 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.

[0226] 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.

[0227] 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.

[0228] Energy storage devices can be located inside the charging pile (e.g., an integrated energy storage and charging unit) or outside the charging pile.

[0229] 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 by, Comprise: a battery cell assembly (1110); a refrigerant heat exchange component (1140) configured to exchange heat with the battery cell assembly (1110), the refrigerant heat exchange component (1140) comprising a functional area (1160) and a non-functional area (1170), the refrigerant heat exchange component (1140) having a refrigerant heat exchange flow channel (1144) inside, a cross-sectional area of the functional area (1160) being at least coincident with a projection of the battery cell assembly (1110); a cross-sectional area of the refrigerant heat exchange flow channel (1144) in the functional area (1160) being equal to a cross-sectional area of the refrigerant heat exchange flow channel (1144) in the non-functional area (1170).

2. The battery device (1100) of claim 1, wherein, The width of the refrigerant heat exchange flow channel (1144) is greater than or equal to 6mm and less than or equal to 15mm.

3. The battery apparatus (1100) of claim 1, wherein, The width of the refrigerant heat exchange flow channel (1144) is greater than or equal to 6mm and less than or equal to 10mm.

4. The battery apparatus (1100) of claim 1, wherein, The refrigerant heat exchange flow channel (1144) comprises a functional area flow channel (1146) and a non-functional area flow channel (1147) in communication, the functional area flow channel (1146) corresponding to the functional area (1160), the non-functional area flow channel (1147) corresponding to the non-functional area (1170); the functional area flow channel (1146) and the non-functional area flow channel (1147) are configured to be located on both sides of a first direction; a cross-sectional area of the functional area flow channel (1146) is equal to a cross-sectional area of the non-functional area flow channel (1147).

5. The battery device (1100) of claim 4, wherein, The functional area flow channel (1146) comprises an upstream flow channel (11442) and a downstream flow channel (11443) in communication, the non-functional area flow channel (1147) comprises an inlet branch flow channel (1148) and a return branch flow channel (1149), the inlet branch flow channel (1148) is in communication with the upstream flow channel (11442), and the return branch flow channel (1149) is in communication with the downstream flow channel (11443); a cross-sectional area of the upstream flow channel (11442), a cross-sectional area of the downstream flow channel (11443), a cross-sectional area of the inlet branch flow channel (1148), and a cross-sectional area of the return branch flow channel (1149) are all equal.

6. The battery device (1100) of claim 5, wherein, The functional area flow channel (1146) comprises a plurality of heat exchange sub-flow channels (11441) arranged in parallel, each of the heat exchange sub-flow channels (11441) comprises the upstream flow channel (11442) and the downstream flow channel (11443), the upstream flow channel (11442) in part of the heat exchange sub-flow channels (11441) is adjacent to and in thermal contact with the downstream flow channel (11443) in an adjacent heat exchange sub-flow channel (11441), and the downstream flow channel (11443) in part of the heat exchange sub-flow channels (11441) is adjacent to and in thermal contact with the upstream flow channel (11442) in an adjacent heat exchange sub-flow channel (11441).

7. The battery device (1100) of claim 6, wherein, The plurality of heat exchange sub-flow channels (11441) are sequentially arranged along a first direction, and the upstream flow channel (11442) and the downstream flow channel (11443) in the heat exchange sub-flow channel (11441) are both arranged along a second direction (Y) perpendicular to the first direction (X).

8. The battery device (1100) of claim 5, wherein, The inlet branch flow channel (1148) comprises a first branch channel (11446) arranged along the first direction (X) and a plurality of second branch channels (11447) each arranged along the second direction (Y), each of the second branch channels (11447) is arranged in communication with the first branch channel (11446) at one end and in communication with the upstream flow channel (11442) at the other end, and the second direction (Y) is perpendicular to the first direction (X); the cross-sectional area of the first branch channel (11446) and the second branch channel (11447) is equal to that of the upstream flow channel (11442).

9. The battery apparatus (1100) of claim 6, wherein, The non-functional area flow channel (1147) further comprises at least one inlet flow channel (11444) in communication with the plurality of upstream flow channels (11442) through the inlet branch flow channel (1148) and at least one outlet flow channel (11445) in communication with the plurality of downstream flow channels (11443) through the outlet branch flow channel (1149); the cross-sectional area of the upstream flow channel (11442), the downstream flow channel (11443), the inlet branch flow channel (1148), the outlet branch flow channel (1149), the inlet flow channel (11444), and the outlet flow channel (11445) are equal.

10. The battery device (1100) of claim 9, wherein, The inlet flow channel (11444) is arranged adjacent to the outlet flow channel (11445).

11. The battery device (1100) of claim 9, wherein, Along the first direction (X), the inlet flow channel (11444) and the outlet flow channel (11445) are located on the same side; the functional area flow channel (1146) further comprises an outlet branch flow channel (11448), each of the downstream flow channels (11443) has a sub-outlet (114431) on the side away from the inlet flow channel (11444), and the outlet flow channel (11445) is arranged in communication with each of the sub-outlets (114431) through the outlet branch flow channel (1149) and the outlet branch flow channel (11448); along the first direction (X), the outlet branch flow channel (11448) is located at one end or both ends of the functional area flow channel (1146).

12. The battery device (1100) of claim 11, wherein, The outlet branch flow channel (11448) comprises a plurality of guide sub-flow channels (11449) extending along the second direction (Y) and in communication, and the plurality of guide sub-flow channels (11449) are in communication between the outlet branch flow channel (1149) and each of the sub-outlets (114431).

13. The battery device (1100) of claim 12, wherein, Along the first direction (X), two adjacent guiding sub-flow channels (11449) have a first interval distance (L1); the upstream flow channels (11442) in each heat exchange sub-flow channel (11441) are provided in plurality and arranged at intervals along the first direction (X), and two adjacent upstream flow channels (11442) have a second interval distance (L2) therebetween; the downstream flow channels (11443) in each heat exchange sub-flow channel (11441) are provided in plurality and arranged at intervals along the first direction (X), and two adjacent downstream flow channels (11443) have a third interval distance (L3) therebetween; the first interval distance (L1) is smaller than the second interval distance (L2) and the third interval distance (L3).

14. The battery apparatus (1100) of claim 11, wherein, An edge region (A) is formed on the surface of the refrigerant heat exchange component (1140) near the edge, and the circuit guiding flow channel (11448) is arranged corresponding to the edge region (A).

15. The battery device (1100) of claim 14, wherein, The edge region (A) avoids the battery monomer assembly (1110).

16. The battery device (1100) of claim 1, wherein, The refrigerant heat exchange flow channel (1144) of the functional area (1160) is symmetrically arranged.

17. The battery apparatus (1100) of claim 7, wherein, The battery monomer assembly (1110) comprises a plurality of battery monomer modules (1111) arranged along the first direction (X), and each battery monomer module (1111) comprises a plurality of battery monomers (1112) arranged along the second direction (Y).

18. The battery device (1100) according to any one of claims 1-17, characterized by The refrigerant heat exchange component (1140) further comprises a box assembly (1120) having a containing cavity (1133), and the refrigerant heat exchange component (1140) is located in the containing cavity (1133) and arranged on the box bottom (11222) of the box assembly (1120) to support the battery monomer assembly (1110).

19. The battery device (1100) according to any one of claims 1-17, characterized by The refrigerant heat exchange component (1140) comprises a box body (1130), and the refrigerant heat exchange component (1140) is connected to the box body (1130) and cooperatively arranged with the box body (1130) to form a containing cavity (1133), and the refrigerant heat exchange component (1140) can be used to support the battery monomer assembly (1110).

20. The battery device (1100) as defined in claim 3, characterized in that The battery device (1100) further comprises a joint component (1150) connected to the refrigerant heat exchange component (1140) and arranged in communication with the refrigerant heat exchange flow channel (1144).

21. A refrigerant heat exchange device characterized by comprising: The refrigerant heat exchange device comprises the refrigerant heat exchange component (1140) in the battery device (1100) according to any one of claims 1-20.

22. An electrical device, comprising: The battery device (1100) according to any one of claims 1-20 is used for storing or providing electric energy.

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