Battery apparatus, refrigerant heat exchange component and electric apparatus

Abstract

The present application belongs to the technical field of battery production, and provides a battery apparatus, a refrigerant heat exchange component and an electric apparatus. The battery apparatus comprises a battery cell assembly and a refrigerant heat exchange component; the refrigerant heat exchange component is configured to exchange heat with the battery cell assembly; the refrigerant heat exchange component is internally provided with a refrigerant heat exchange passage; the refrigerant heat exchange passage comprises an upstream passage, a downstream passage and a loop guide passage; one end of the downstream passage leads to the upstream passage, and the other end of the downstream passage leads to the loop guide passage; the refrigerant heat exchange component is provided with a heat exchange face; the upstream passage and the downstream passage are arranged opposite to the heat exchange face; the loop guide passage is at least provided with a portion arranged to avoid the battery cell assembly. The present application aims to reduce the area where overheating of the refrigerant heat exchange component affects the battery cell assembly.

Description

Battery device, refrigerant heat exchange component and electric device

[0001] The present application claims priority to the Chinese patent application No. 2025101990914, filed on February 21, 2025, and entitled "Battery device, refrigerant heat exchange component and electric device", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0002] The present application relates to the technical field of battery production, in particular to a battery device, a refrigerant heat exchange component and an electric device. BACKGROUND

[0003] In the process of charging and discharging, the battery device in a new energy vehicle releases a large amount of heat. A heat exchange component is usually arranged in the battery device to exchange heat with the battery monomer assembly, so as to cool the battery monomer assembly.

[0004] In the related art, the heat exchange component usually exchanges heat between the heat exchange fluid flowing through the heat exchange flow channel and the battery monomer assembly. However, the heat exchange capacity gradually decreases in the process of heat exchange fluid flowing, so that a overheated area is formed on the heat exchange component. The heat exchange capacity of the overheated area to the battery monomer assembly is very poor, so that the temperature of part of the battery monomer assembly is easily sharply increased, which affects the balanced heat dissipation of the battery device, and a large amount of heat is accumulated in the battery device, thereby affecting the use performance and service life of the battery device. SUMMARY

[0005] The purpose of the embodiments of the present application is to provide a battery device, a refrigerant heat exchange component and an electric device, which aims to solve the technical problem that the overheated area in the battery device greatly affects the balanced heat exchange of the refrigerant heat exchange component. TECHNICAL SOLUTION

[0006] The technical solution adopted by the embodiments of the present application is:

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

[0008] a battery monomer assembly;

[0009] a refrigerant heat exchange component configured to exchange heat with the battery monomer assembly; the refrigerant heat exchange component has a refrigerant heat exchange flow channel inside, the refrigerant heat exchange flow channel comprises an upstream flow channel, a downstream flow channel and a loop guide flow channel, one end of the downstream flow channel is in communication with the upstream flow channel, the other end of the downstream flow channel is in communication with the loop guide flow channel, the refrigerant heat exchange component has a heat exchange surface, the upstream flow channel and the downstream flow channel are oppositely arranged with the heat exchange surface, and the loop guide flow channel has at least a part avoiding the battery monomer assembly.

[0010] In the embodiment, the circuit guiding flow channel is arranged to at least partially avoid the battery monomer assembly, so as to reduce the influence of the overheated area on the heat exchange of the battery monomer assembly, reduce the area of the battery monomer assembly affected by the overheating of the refrigerant heat exchange component, improve the heat exchange effect of the battery monomer assembly, and improve the heat exchange uniformity of the battery monomer assembly.

[0011] In one of the embodiments, the circuit guiding flow channel is arranged at one end of the refrigerant heat exchange flow channel in the first direction.

[0012] In one of the embodiments, the circuit guiding flow channel is arranged at one end of the refrigerant heat exchange flow channel in the first direction.

[0013] In the embodiment, the circuit guiding flow channel is arranged at one end or both ends of the refrigerant heat exchange flow channel in the first direction, that is, the circuit guiding flow channel is arranged at the edge position of the refrigerant heat exchange component, and the circuit guiding flow channel is arranged close to the battery monomer assembly with a relatively low temperature at the edge position, so as to reduce the influence of the overheated area on the battery monomer assembly and realize balanced heat exchange of the battery monomer assembly.

[0014] In one of the embodiments, the surface of the refrigerant heat exchange component forms an edge area at the edge position, and the circuit guiding flow channel is arranged corresponding to the edge area.

[0015] In the embodiment, the circuit guiding flow channel is arranged at the edge area of the refrigerant heat exchange component, so as to reduce the influence of the overheating on the battery monomer assembly, and improve the balanced heat dissipation of the battery monomer assembly.

[0016] In one of the embodiments, the upstream flow channel, the downstream flow channel, and the circuit guiding flow channel are arranged in the first direction, and the upstream flow channel, the downstream flow channel, and the circuit guiding flow channel are arranged in the second direction.

[0017] In the embodiment, the upstream flow channel, the downstream flow channel, and the circuit guiding flow channel are arranged in the second direction and are arranged in the first direction, so that the distribution of the refrigerant heat exchange flow channel is more regular, and the flow rate of the heat exchange medium is improved, and the heat exchange efficiency is improved.

[0018] In one of the embodiments, the upstream flow channel and the downstream flow channel are arranged adjacent to each other.

[0019] In the embodiment, the upstream flow channel and the downstream flow channel are arranged adjacent to each other, and the low temperature of the upstream flow channel can balance the high temperature of the downstream flow channel, so that the temperature of the region on the heat exchange surface corresponding to the downstream flow channel is reduced, thereby preventing the formation of a superheated region, and the area of the superheated region is relatively reduced, which is beneficial to improve the heat exchange effect on the battery monomer assembly and make the temperature distribution on the refrigerant heat exchange component more uniform, thereby improving the heat exchange uniformity on the battery monomer assembly.

[0020] In one of the embodiments, the refrigerant heat exchange flow channel includes a plurality of heat exchange sub-flow channels arranged in sequence along the first direction, each heat exchange sub-flow channel includes an upstream flow channel and a downstream flow channel connected in communication, the upstream flow channel in part of the heat exchange sub-flow channels is adjacent to and in thermal contact with the downstream flow channel in the adjacent heat exchange sub-flow channel, the downstream flow channel in part of the heat exchange sub-flow channels is adjacent to and in thermal contact with the upstream flow channel in the adjacent heat exchange sub-flow channel, and each downstream flow channel is arranged in communication with the circuit guide flow channel.

[0021] In the embodiment, by arranging a plurality of heat exchange sub-flow channels, it is beneficial to increase the heat exchange area, and the upstream flow channel and the downstream flow channel in the adjacent heat exchange sub-flow channels are adjacent and in thermal contact, thereby beneficial to increase the balanced heat exchange area of the downstream flow channel to the upstream flow channel, and make the temperature distribution of the refrigerant heat exchange component more uniform, thereby improving the heat exchange uniformity on the battery monomer assembly.

[0022] In one of the embodiments, the upstream flow channel and the downstream flow channel are arranged in extension along the second direction, and the second direction is perpendicular to the first direction.

[0023] In the embodiment, the upstream flow channel and the downstream flow channel are arranged in extension along the second direction and adjacent to each other, which is beneficial to increase the length of the adjacent region between the upstream flow channel and the downstream flow channel, and beneficial to increase the area of the adjacent heat exchange and increase the heat exchange efficiency.

[0024] In one of the embodiments, a plurality of upstream flow channels and a plurality of downstream flow channels are respectively arranged, each upstream flow channel is arranged in parallel and spaced apart from each other, and each downstream flow channel is arranged in parallel and spaced apart from each other.

[0025] In the embodiment, by increasing the number of upstream flow channels and downstream flow channels and arranging the upstream flow channels and the downstream flow channels adjacent to each other, it is beneficial to increase the heat exchange area of the adjacent region between the upstream flow channel and the downstream flow channel, and increase the heat exchange efficiency.

[0026] In one of the embodiments, the circuit guide flow channel includes a plurality of guide sub-flow channels arranged in extension along the second direction and in communication, and the plurality of guide sub-flow channels are in communication with each downstream flow channel.

[0027] In the embodiment, the plurality of guide sub-flow channels extending in the second direction are arranged, so that the return flow of the refrigerant heat exchange flow channel is smoother, and the space utilization in the refrigerant heat exchange component is improved, and the layout of the refrigerant heat exchange flow channel is more reasonable.

[0028] In one of the embodiments, in the first direction, the two adjacent guide sub-flow channels have a first interval distance; the plurality of upstream flow channels are arranged in the first direction with a second interval distance between the two adjacent upstream flow channels; the plurality of downstream flow channels are arranged in the first direction with a third interval distance between the two adjacent downstream flow channels; the first interval distance is smaller than the second interval distance and the third interval distance, and the first direction is perpendicular to the second direction.

[0029] In the embodiment, the interval distance between the plurality of guide sub-flow channels is smaller than the interval distance of the downstream flow channel and the interval distance of the upstream flow channel, so that the area of the overheating region of the circuit guide flow channel on the refrigerant heat exchange component is reduced.

[0030] In one of the embodiments, the refrigerant heat exchange flow channel includes a non-functional area flow channel and a functional area flow channel in communication, the functional area flow channel includes the upstream flow channel, the downstream flow channel and the circuit guide flow channel, the non-functional area flow channel includes the inlet branch flow channel and the circuit branch flow channel, the inlet branch flow channel is arranged in communication with the upstream flow channel, and the circuit branch flow channel is arranged in communication with the circuit guide flow channel.

[0031] In the embodiment, the non-functional area flow channel and the functional area flow channel are arranged in different regions, so that the functional area and the non-functional area can be formed on the refrigerant heat exchange component, the functional area is mainly used for heat exchange of the battery monomer assembly, and the non-functional area is mainly used for branch flow of the heat exchange refrigerant, so as to improve the functional design rationality of the refrigerant heat exchange component.

[0032] In one of the embodiments, the non-functional area flow channel and the functional area flow channel are arranged on the two sides of the first direction.

[0033] In the embodiment, the functional area flow channel and the non-functional area flow channel are arranged in different regions, so as to improve the rationality of the flow channel arrangement, and the functional area flow channel can better exchange heat with the battery monomer assembly.

[0034] In one of the embodiments, the inlet branch flow channel includes a first branch channel and a plurality of second branch channels, the first branch channel extends in the first direction, each second branch channel extends in the second direction, one extension end of each second branch channel is arranged in communication with the first branch channel, and the other extension end of each second branch channel is arranged in communication with each upstream flow channel respectively; the second direction is perpendicular to the first direction.

[0035] In the embodiment, each second branch channel is perpendicular to the first branch channel, and each second branch channel is opposite to each downstream channel, so that the flow of the heat exchange medium is smooth, and the flow path of the heat exchange medium is reduced, and the heat exchange loss is reduced.

[0036] In one of the embodiments, the non-functional area flow channel further comprises at least one inlet flow channel and at least one outlet flow channel, each inlet flow channel is in communication with the inlet branch flow channel, and each outlet flow channel is in communication with the loop guide flow channel.

[0037] In the embodiment, the number of the upstream channels and the downstream channels is increased, and the upstream channels and the downstream channels are reasonably planned and arranged, so that the uniformity of the layout is improved, and the uniformity of the refrigerant heat exchange component is improved.

[0038] In one of the embodiments, the inlet flow channel is arranged adjacent to the outlet flow channel.

[0039] In the embodiment, the adjacent arrangement of the inlet flow channel and the outlet flow channel is beneficial to realize temperature balance and improve the flow of the heat exchange refrigerant, so as to balance the temperature difference of the heat exchange surface.

[0040] In one of the embodiments, the battery device further comprises a box frame, the refrigerant heat exchange component is connected to the box frame and cooperates with the box frame to form a containing cavity, the battery monomer assembly is contained in the containing cavity, and the refrigerant heat exchange component can be used to support the battery monomer assembly; the loop guide flow channel at least partially overlaps with the box frame in a projection plane parallel to the heat exchange surface.

[0041] In the embodiment, the loop guide flow channel at least partially overlaps with the box frame in the projection plane parallel to the heat exchange surface, so that the overheated area corresponding to the loop guide flow channel on the refrigerant heat exchange component can be avoided as much as possible to reduce the area of the influence of the overheated area on the battery monomer assembly.

[0042] In one of the embodiments, the upstream channels and the downstream channels are arranged at intervals in the first direction, the upstream channels and the downstream channels are arranged in the second direction, the battery monomer assembly comprises a plurality of battery monomer modules arranged in the first direction, each battery monomer module comprises a plurality of battery monomers arranged in the second direction, and each battery monomer is arranged close to or in contact with the heat exchange surface; the second direction is perpendicular to the first direction.

[0043] In the embodiment, the arrangement mode of the battery monomer assembly is matched with the arrangement mode of the refrigerant heat exchange flow channel, so that the uniformity of the heat exchange of the refrigerant heat exchange flow channel on the battery monomer assembly is improved.

[0044] In one of the embodiments, the refrigerant heat exchange component has a symmetry plane, the functional area flow channel is symmetrically arranged about the symmetry plane, and the upstream channels, the downstream channels and the loop guide flow channels are distributed on both sides of the symmetry plane.

[0045] In the embodiment, the function area flow channels are symmetrically arranged, thereby facilitating the balanced heat dissipation of the battery monomer assembly by the refrigerant heat exchange component.

[0046] In one of the embodiments, the battery device further comprises a joint component connected to the refrigerant heat exchange component and arranged in communication with the refrigerant heat exchange flow channel.

[0047] In the embodiment, the joint component is arranged, thereby facilitating the connection with the external pipeline for conveying the heat exchange medium and improving the convenience of assembly.

[0048] In a second aspect, the application provides a refrigerant heat exchange component, which has a refrigerant heat exchange flow channel inside, the refrigerant heat exchange flow channel comprising an upstream flow channel, a downstream flow channel and a loop guide flow channel, one end of the downstream flow channel being in communication with the upstream flow channel, the other end of the downstream flow channel being in communication with the loop guide flow channel, the refrigerant heat exchange component having a heat exchange surface, the upstream flow channel and the downstream flow channel being arranged opposite to the heat exchange surface, the loop guide flow channel at least having a part arranged to avoid the heat exchange surface.

[0049] In the embodiment, the loop guide flow channel is arranged to at least partly avoid the heat exchange surface, thereby facilitating the reduction of the influence of the overheated area corresponding to the loop guide flow channel on the overall heat exchange of the battery monomer assembly, the reduction of the area of the battery monomer assembly affected by the overheating of the refrigerant heat exchange component, the improvement of the heat exchange effect on the battery monomer assembly and the improvement of the heat exchange uniformity on the battery monomer assembly.

[0050] In one of the embodiments, the loop guide flow channel is one, which is distributed at one end of the refrigerant heat exchange flow channel along the first direction; or

[0051] The loop guide flow channel is two, which are spaced apart and arranged opposite to each other along the first direction, and the upstream flow channel and the downstream flow channel are both distributed in the area between the two loop guide flow channels.

[0052] In the embodiment, the loop guide flow channel is arranged close to the edge position of the battery monomer assembly with relatively low temperature, thereby facilitating the reduction of the influence of the overheated area on the battery monomer assembly and the balanced heat exchange of the battery monomer assembly.

[0053] In one of the embodiments, the upstream flow channel and the downstream flow channel are arranged adjacent to each other.

[0054] In the embodiment, the low temperature of the upstream flow channel can balance the high temperature of the downstream flow channel, reduce the temperature of the area on the heat exchange surface corresponding to the downstream flow channel, thereby reducing the area of the overheated area, improving the heat exchange effect on the battery monomer assembly and making the temperature distribution on the refrigerant heat exchange component more uniform to improve the heat exchange uniformity on the battery monomer assembly.

[0055] In one of the embodiments, the refrigerant heat exchange flow channel comprises a plurality of heat exchange sub-flow channels arranged in sequence along the first direction, each of the heat exchange sub-flow channels comprises an upstream flow channel and a downstream flow channel connected in communication, the upstream flow channel in part of the heat exchange sub-flow channels is adjacent to and in thermal conduction with the downstream flow channel in the adjacent heat exchange sub-flow channel, the downstream flow channel in part of the heat exchange sub-flow channels is adjacent to and in thermal conduction with the upstream flow channel in the adjacent heat exchange sub-flow channel, and each of the downstream flow channels is arranged in communication with the loop guide flow channel.

[0056] In the embodiment, by arranging the plurality of heat exchange sub-flow channels, the heat exchange area is increased, the upstream flow channel and the downstream flow channel in the adjacent heat exchange sub-flow channels are adjacent in thermal conduction, the balanced heat exchange area of the downstream flow channel to the upstream flow channel is increased, the temperature distribution of the refrigerant heat exchange component is more uniform, and the heat exchange uniformity of the battery monomer assembly is improved.

[0057] In a third aspect, the application provides a power utilization device comprising the battery device according to any one of the above.

[0058] The above description is only a summary of the technical solutions of the application, in order to more clearly understand the technical means of the application, the specific embodiments of the application can be implemented according to the content of the description, and in order to make the above and other purposes, characteristics and advantages of the application more obvious and easy to understand, the following will describe the specific embodiments of the application. BRIEF DESCRIPTION OF DRAWINGS

[0059] In order to more clearly illustrate the technical solutions of the embodiments of the application, the following will briefly introduce the drawings needed to be used in the embodiments of the application or the prior art description. Obviously, the drawings described below are only some embodiments of the application, and those skilled in the art can obtain other drawings according to these drawings without creating any creative labor.

[0060] Fig. 1 is a structural schematic diagram of a vehicle provided by some embodiments of the application;

[0061] Fig. 2 is an exploded structural schematic diagram of a battery device provided by some embodiments of the application;

[0062] Fig. 3 is an exploded structural schematic diagram of a refrigerant heat exchange component in the battery device provided by some embodiments of the application;

[0063] Fig. 4 is a relative position relationship diagram between the refrigerant heat exchange flow channel and the battery monomer assembly in the battery device provided by some embodiments of the application;

[0064] Fig. 5 is a relative position relationship diagram between the refrigerant heat exchange flow channel and the battery monomer assembly in the battery device provided by some embodiments of the application;

[0065] Figure 6 is a diagram showing the relative positions of the refrigerant heat exchange flow channel, the battery cell assembly and the box frame in the battery device according to some embodiments of the present application;

[0066] Figure 7 is a diagram showing the structure of the refrigerant heat exchange flow channel on the refrigerant heat exchange component in the battery device according to some embodiments of the present application;

[0067] Figure 8 is a diagram showing the structure of the refrigerant heat exchange flow channel on the refrigerant heat exchange component in the battery device according to some embodiments of the present application;

[0068] Figure 9 is a diagram showing the structure of the refrigerant heat exchange flow channel on the refrigerant heat exchange component in the battery device according to some embodiments of the present application;

[0069] Figure 10 is a diagram showing the enlarged view of position A in Figure 9;

[0070] Figure 11 is a diagram showing the enlarged view of position B in Figure 8;

[0071] Figure 12 is a diagram showing the enlarged view of position C in Figure 9;

[0072] Figure 13 is a diagram showing the enlarged view of position D in Figure 9;

[0073] Figure 14 is a diagram showing the enlarged view of position E in Figure 9;

[0074] Figure 15 is a diagram showing the enlarged view of position F in Figure 9;

[0075] Figure 16 is a diagram showing the temperature distribution of the refrigerant heat exchange flow channel on the refrigerant heat exchange component in the battery device according to some embodiments of the present application.

[0076] Explanation of reference numerals in the attached drawings: 1000, vehicle; 1100, battery unit; 1110, battery cell assembly; 1111, battery cell module; 1112, battery cell; 1130, housing assembly; 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 channel; 11445, outlet channel; 1 1446, First branch channel; 11447, Second branch channel; 11448, Loop guide channel; 11449, Guide sub-channel; 1145, Symmetry plane; 1146, Functional area channel; 1147, Non-functional area channel; 1148, Inlet branch channel; 1149, Loop branch channel; 1150, Connector component; 1200, Controller; 1300, Motor; A, Edge region; B, First uniform temperature region; C, Second region; D, First region; E, Branching region; F, Second uniform temperature region; X, First direction; Y, Second direction; L1, First interval distance; L2, Second interval distance; L3, Third interval distance. Detailed Implementation

[0077] 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.

[0078] 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.

[0079] 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.

[0080] 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.

[0081] 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.

[0082] 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).

[0083] 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.

[0084] 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.

[0085] 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.

[0086] 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.

[0087] Fast charging is a mainstream solution for rapidly replenishing energy in new energy vehicles. However, its implementation faces numerous challenges. During fast charging, the electrode components generate a significant amount of heat, which can easily cause a rapid rise in the internal temperature of the battery pack. In fast charging, uneven heat exchange between the heat exchange components and individual battery cells is more likely to occur, leading to a sharp increase in the temperature of some individual battery cells and the accumulation of large amounts of heat inside the battery pack. This negatively impacts the battery's performance and lifespan, and may even pose significant safety hazards during use. Therefore, ensuring balanced heat dissipation, rapid heat exchange, and improving the consistency of temperature distribution within the battery pack have become bottlenecks in battery thermal management.

[0088] Specifically, regarding the problem of uneven temperature distribution and localized high temperatures within the battery device, research has revealed that for refrigerant heat exchange components, which employ refrigerant heat exchange, the internal refrigerant heat exchange channels are centrally located. The inlet channels (corresponding to the upstream channels in this application) and the return channels (corresponding to the downstream channels in this application) are also centrally located. The heat exchange medium (e.g., refrigerant) changes from a liquid to a gaseous state after entering the inlet channels for heat exchange. In the return channels, the refrigerant essentially vaporizes. The gaseous refrigerant has a relatively small heat exchange capacity, especially... At the location of the circuit guide flow channel, the heat exchange capacity of the refrigerant heat exchange component for the battery cell module is further reduced, resulting in an overheated area on the refrigerant heat exchange component. The overheated area reduces the heat exchange capacity of the battery cell module. 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, causing the temperature of the battery cell module corresponding to the overheated area to rise sharply. The temperature distribution on the battery cell module becomes uneven, heat accumulates, and thus affects the performance and service life of the battery cell module and battery device.

[0089] Therefore, this application provides a battery device that addresses the problem of reduced heat exchange capacity of the area corresponding to the loop guide channel on the refrigerant heat exchange component, leading to the formation of overheated areas. The device ensures that the area corresponding to the loop guide channel on the refrigerant heat exchange component has at least a portion that avoids the heat exchange surface (i.e., avoids the battery cell assembly), thereby reducing the area affected by the overheated area on the battery cell assembly. This helps reduce the impact of the overheated area on the heat exchange of the battery cell assembly, thus reducing the risk of battery cell overheating, improving the heat exchange effect of the refrigerant heat exchange component on the battery cell assembly, and ultimately improving the performance and lifespan of the battery device.

[0090] Specifically, referring to FIG2, this application embodiment provides a battery apparatus 1100, which may include one or more battery cell assemblies 1110 for providing voltage and capacity. Each battery cell assembly may include multiple battery cells 1112, which are connected in series, parallel, or mixed connections via a busbar. The battery apparatus 1100 may also be a battery pack, which generally includes a housing assembly 1130 and one or more battery cell assemblies 1110, with the battery cell assemblies 1110 housed within the housing assembly 1130.

[0091] 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.

[0092] 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.

[0093] Please refer to Figure 1, which is a structural schematic diagram of a vehicle 1000 provided in some embodiments of this application. The vehicle 1000 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. A battery device 1100 is provided inside the vehicle 1000, and the battery device 1100 can be located at the bottom, front, or rear of the vehicle 1000. The battery device 1100 can be used to power the vehicle 1000; for example, the battery device 1100 can serve as the operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 1200 and a motor 1300. The controller 1200 is used to control the battery device 1100 to supply power to the motor 1300, for example, to meet the power needs of the vehicle 1000 during startup, navigation, and driving.

[0094] 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.

[0095] Please refer to Figure 2, which is an exploded view of a battery device 1100 provided in some embodiments of this application. In one embodiment, the battery device 1100 includes a frame 1132 and a battery cell assembly 1110. A refrigerant heat exchange component 1140 is connected to the frame 1132 and together with the frame 1132 forms a receiving cavity 1133. The battery cells 1112 are housed in the receiving cavity 1133. The battery cell assembly 1110 is usually formed by arranging multiple battery cells 1112. Alternatively, the battery cell assembly 1110 can also be a battery module, which is formed by arranging and fixing multiple battery cells 1112 to form an independent module.

[0096] 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.

[0097] According to some embodiments of this application, referring to Figures 2-6, this application 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 has a refrigerant heat exchange channel 1144 inside, which includes an upstream channel 11442, a downstream channel 11443, and a loop guide channel 11448. One end of the downstream channel 11443 is connected to the upstream channel 11442, and the other end of the downstream channel 11443 is connected to the loop guide channel 11448. The refrigerant heat exchange component has a heat exchange surface 1143. The upstream channel 11442 and the downstream channel 11443 are disposed opposite to the heat exchange surface 1143. The loop guide channel 11448 has at least a portion that avoids the battery cell assembly 1110.

[0098] 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 is formed on the refrigerant heat exchange component 1140. It can be seen that the refrigerant heat exchange component 1140 is a heat treatment component, and the interior of the heat treatment component is used for the flow of refrigerant.

[0099] 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.

[0100] 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.

[0101] In this battery device 1100, the refrigerant heat exchange component 1140 can adopt a direct cooling heat exchange method, and the heat exchange medium can be a heat exchange refrigerant. Therefore, the flow channel opened inside the refrigerant heat exchange component 1140 is defined as the refrigerant heat exchange flow channel 1144, which can be simply referred to as the heat exchange flow channel. As shown in Figures 4 and 5, the refrigerant heat exchange flow channel 1144 inside the refrigerant heat exchange component 1140 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. This through hole structure or cavity structure forms the refrigerant heat exchange flow channel 1144.

[0102] The refrigerant heat exchange component 1140 can be integrally molded, and the refrigerant heat exchange channel 1144 can be prepared by 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 extension shape is formed on the second sub-component 1142. The groove structure can be prepared by stamping. The first sub-component 1141 and the second sub-component 1142 are fixedly or detachably connected, and the groove opening is closed to form a through-hole structure or a cavity structure, which forms the refrigerant heat exchange channel 1144.

[0103] 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.

[0104] For example, the refrigerant heat exchange component 1140 is formed using a bent tube. The bent tube extends and bends in a plane parallel to the heat exchange surface 1143. Thus, the cavity of the bent tube forms the refrigerant heat exchange channel 1144, and the surface of the bent tube facing the battery cell assembly 1110 forms the heat exchange surface 1143. Thermally conductive adhesive is applied between adjacent tubes in the bent tube, allowing heat transfer between the upstream channel 11442 and the downstream channel 11443.

[0105] Referring to Figures 5-7, the refrigerant heat exchange channel 1144 includes an upstream channel 11442, a downstream channel 11443, and a loop guide channel 11448 connected in sequence. That is, one end of the downstream channel 11443 is connected to the upstream channel 11442, and the other end of the downstream channel 11443 is connected to the loop guide channel 11448, so that the heat exchange medium enters the downstream channel 11443 from the upstream channel 11442, then flows to the loop guide channel 11448, and then flows out from the loop guide channel 11448, forming a circulating heat exchange.

[0106] The heat exchange medium is a heat exchange refrigerant, which enables the refrigerant heat exchange component 1140 to adopt a direct cooling heat exchange method. The heat exchange process is as follows: after entering the upstream flow channel 11442 for heat exchange, the heat exchange medium changes from a liquid state to a gaseous state. The upstream flow channel 11442 has a large amount of liquid heat exchange refrigerant and a large phase change heat, resulting in a strong heat exchange capacity for the battery cell module 1110. The heat exchange refrigerant enters the downstream flow channel 11443 from the upstream flow channel 11442. In the downstream flow channel 11443, the heat exchange refrigerant is basically vaporized. The heat exchange capacity of the gaseous heat exchange refrigerant is small, thus reducing the heat exchange capacity for the battery cell module 1110. When the heat exchange refrigerant re-enters the loop guide flow channel 11448, it basically loses its heat exchange capacity. Therefore, the heat exchange capacity of the refrigerant heat exchange component 1140 for the battery cell module 1110 in the area of ​​the loop guide flow channel 11448 is very low, and this area becomes an overheated area.

[0107] It should be noted that the refrigerant heat exchange component 1140 has a heat exchange surface 1143, which can be considered as the heat exchange area on the refrigerant heat exchange component 1140 that mainly exchanges heat with the battery cell module 1110. Both the upstream flow channel 11442 and the downstream flow channel 11443 are opposite to the heat exchange surface 1143. The heat exchange medium in the upstream flow channel 11442 and the downstream flow channel 11443 exchanges heat with the heat exchange surface 1143, and the heat exchange surface 1143 then exchanges heat with the battery cell module 1110.

[0108] For the overheated area, it should be understood as the surface area on the refrigerant heat exchange component 1140 opposite to the loop guide channel 11448. In this application, the overheated area should at least have a portion that avoids the battery cell assembly 1110. That is, the loop guide channel 11448 should at least have a portion that avoids the battery cell assembly 1110. Here, "at least" should be understood as, in one case, a portion of the loop guide channel 11448 is opposite to the battery cell assembly 1110, and another portion of the loop guide channel 11448 avoids the battery cell assembly 1110. The setting can be understood as a staggered setting, in order to reduce the area of ​​the overheated area relative to the battery cell module 1110, thereby reducing the impact of the overheated area on the battery cell module 1110; another scenario is that in the circuit guide flow channel 11448, all the circuit guide flow channels 11448 are set to avoid the battery cell module 1110, that is, all the circuit guide flow channels 11448 are staggered with the battery cell module 1110, in order to further reduce the area of ​​the overheated area relative to the battery cell module 1110, thereby reducing the impact of the overheated area on the battery cell module 1110.

[0109] In this embodiment, the loop guide channel 11448 is configured to at least partially avoid the battery cell assembly 1110, which helps to reduce the impact of the overheated area corresponding to the loop guide channel 11448 on the overall heat exchange of the battery cell assembly 1110, helps to reduce the area affected by overheating on the refrigerant heat exchange component 1140 on the battery cell assembly 1110, helps to improve the heat exchange effect of the battery cell assembly 1110, and improves the heat exchange uniformity of the battery cell assembly 1110.

[0110] Considering that the heat exchange capacity of the loop guide channel 11448 for the battery cell assembly 1110 is low and that it is easy to form an overheated area on the refrigerant heat exchange component 1140, and considering that the battery cell 1112 located in the middle of the battery cell assembly 1110 has poor heat dissipation capacity and relatively high temperature, while the battery cell 1112 located near the edge has better heat dissipation capacity and relatively low temperature, the loop guide channel 11448 is set near the edge or end of the battery cell assembly 1110 to keep away from the battery cell 1112 located in the middle and with a higher temperature, in accordance with the temperature distribution characteristics of the entire battery cell assembly 1110.

[0111] Specifically, in some embodiments, referring to Figures 7 and 8, a loop guide channel 11448 is provided, which is distributed at one end of the refrigerant heat exchange channel 1144 along a first direction X.

[0112] 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.

[0113] It can be seen that the upstream flow channel 11442 and the downstream flow channel 11443 correspond to the heat exchange surface 1143, and the loop guide flow channel 11448 corresponds to the overheated region. Therefore, in the first direction X, the refrigerant heat exchange flow channel 1144 has two end positions, which can also be understood as edge positions, and the end positions are opposite to the middle positions. The loop guide flow channel 11448 is set at the end or edge positions of the entire refrigerant heat exchange flow channel 1144, so that the loop guide flow channel 11448 can better avoid the high-temperature battery cell assembly 1110 in the middle, which is beneficial to minimize the impact of the overheating phenomenon of the loop guide flow channel 11448 on the high-temperature battery cell assembly 1110.

[0114] In some embodiments, as shown in Figures 7 and 8, two loop guide channels 11448 are provided. Along the first direction X, the two loop guide channels 11448 are spaced apart and arranged opposite to each other. The upstream channel 11442 and the downstream channel 11443 are both distributed in the area between the two loop guide channels 11448.

[0115] Since there are two end positions along the first direction X, two loop guide channels 11448 can be provided, so that the two loop guide channels 11448 are located at the two end positions or edge positions of the entire refrigerant heat exchange channel 1144 respectively.

[0116] In this embodiment, the loop guide channel 11448 is disposed at one or both ends of the refrigerant heat exchange channel 1144 along the first direction X, that is, the loop guide channel 11448 is located at the edge of the refrigerant heat exchange component 1140, and the loop guide channel 11448 is disposed close to the battery cell assembly 1110 at the edge where the temperature is relatively low, thereby helping to reduce the impact of the overheated area on the battery cell assembly 1110 and helping to achieve balanced heat exchange of the battery cell assembly 1110.

[0117] In some embodiments, as shown with reference to Figures 5, 6, 8, 9 and 16, an edge region A is formed on the surface of the refrigerant heat exchange component 1140 near the edge, and a loop guide channel 11448 is configured corresponding to the edge region A.

[0118] 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. Then, the edge region A can be understood as the region near the edge of the heat exchange surface 1143, or the edge region A can also be understood as the region adjacent to the heat exchange surface 1143 on one of the surfaces. Theoretically, there can be multiple edge regions A, but based on the structural layout of the refrigerant heat exchange channel 1144, as shown in Figures 8 and 9, only one or two edge regions A near the edge at both ends along the first direction X are studied on the surface of the refrigerant heat exchange component 1140 forming the heat exchange surface 1143. It can be considered that the surface of the refrigerant heat exchange component 1140 forming the heat exchange surface 1143 has one edge region A or two edge regions A.

[0119] 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.

[0120] It is understood that edge region A is the overheated region in the above embodiment. Therefore, in this example, the overheated region is located at the edge of one surface of the refrigerant heat exchange component 1140. Specifically, the temperature of the region on the surface of the refrigerant heat exchange component 1140 corresponding to the loop guide channel 11448 is high. It can be observed that the temperature of the battery cell assembly 1110 near the edge of the refrigerant heat exchange component 1140 and near the side wall of the frame 1132 is lower than that of the battery cell assembly 1110 in the central region. Therefore, arranging the loop guide channel 11448 in edge region A helps to reduce the impact of overheating on the battery cell assembly 1110. Referring to Figure 16, the temperature of edge region A corresponding to the loop guide channel 11448 is also relatively balanced, making overheating less likely.

[0121] Taking a horizontally placed 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, forming an overheated area. If edge region A comes into contact with the battery cell assembly 1110, it will inevitably affect the heat exchange of that portion of the battery cell assembly 1110, potentially leading to a sharp increase in the temperature of the battery cell assembly 1110. Therefore, edge region A should at least partially avoid the battery cell assembly 1110. That is, battery cell assemblies 1110 should not be placed above edge region A, or at least not above a portion of edge region A. This ensures that the battery cells 1112 are as far away from edge region A as possible, thereby reducing the impact of overheating on the heat exchange of the battery cell assembly 1110.

[0122] In this embodiment, the circuit guide channel 11448 is located in the edge region A of the refrigerant heat exchange component 1140, which helps to keep the overheated area away from the battery cell 1112 located in the middle and with a higher temperature. This helps to reduce the impact of overheating on the battery cell assembly 1110 and improve the balanced heat dissipation of the battery cell assembly 1110.

[0123] In some embodiments, as shown in FIG7-9, the upstream flow channel 11442, the downstream flow channel 11443, and the loop guide flow channel 11448 are arranged at intervals in the first direction X, and the upstream flow channel 11442, the downstream flow channel 11443, and the loop guide flow channel 11448 are all arranged to extend along the second direction Y, which is perpendicular to the first direction X.

[0124] 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.

[0125] 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, the downstream flow channel 11443, and the loop guide flow channel 11448 are all extended along the second direction Y. It can be seen that the upstream flow channel 11442, the downstream flow channel 11443, and the loop guide flow channel 11448 are arranged in parallel and spaced apart in the first direction X. The extension direction of the upstream flow channel 11442 and the downstream flow channel 11443 is along the length direction of the plate. Multiple upstream flow channels 11442, downstream flow channels 11443, and loop guide flow channels 11448 can be provided respectively. Along the second direction Y, the upstream flow channel 11442 and the downstream flow channel 11443 are connected at one end, and the downstream flow channel 11443 is connected at one end to the loop guide flow channel 11448.

[0126] In this embodiment, the upstream flow channel 11442, the downstream flow channel 11443, and the loop guide flow channel 11448 all extend along the second direction Y and are spaced apart in the first direction X, making the distribution of the refrigerant heat exchange flow channel 1144 more regular, which is conducive to improving the flow rate of the heat exchange medium and improving the heat exchange efficiency.

[0127] In related technologies, the centralized arrangement of multiple downstream channels 11443 will cause a large overheated area to form on the refrigerant heat exchange component 1140. The large overheated area will affect the overall heat exchange effect of the battery cell module 1110, causing the temperature of the battery cell module 1110 to rise, which in turn will affect the performance and service life of the battery cell module 1110 and the battery device 1100.

[0128] Therefore, in some embodiments, as shown in FIG7-9, the upstream flow channel 11442 and the downstream flow channel 11443 are arranged adjacent to each other.

[0129] Analyzing the 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, and the temperature of the area on the heat exchange surface 1143 corresponding to the downstream flow channel 11443 is high. Therefore, to reduce the area of ​​the overheated region, the upstream flow channel 11442 and the downstream flow channel 11443 in the refrigerant heat exchange flow channel 1144 are placed adjacent to each other and thermally coordinated. "Adjacent" refers to the upstream flow channel... Flow channel 11442 and downstream flow channel 11443 are directly connected in space (without gap) or have only a very small gap; thermal conduction matching means that heat conduction (or heat exchange) can be carried out between adjacent upstream flow channel 11442 and downstream flow channel 11443. It can also be understood that due to the adjacent configuration of upstream flow channel 11442 and downstream flow channel 11443, heat conduction (or heat exchange) can be carried out between the area on heat exchange surface 1143 corresponding to upstream flow channel 11442 and the area on heat exchange surface 1143 corresponding to downstream flow channel 11443.

[0130] It can be seen that the thermal conductivity between the upstream flow channel 11442 and the downstream flow channel 11443 is such that the low temperature of the upstream flow channel 11442 balances the high temperature of the downstream flow channel 11443. In other words, the low temperature region on the heat exchange surface 1143 corresponding to the upstream flow channel 11442 balances the high temperature region on the heat exchange surface 1143 corresponding to the downstream flow channel 11443. This reduces the temperature difference on the heat exchange surface 1143 of the refrigerant heat exchange component 1140. Therefore, it can be seen that the temperature of the region of the heat exchange surface 1143 corresponding to the downstream flow channel 11443 adjacent to the upstream flow channel 11442 is not prone to excessive increase and the temperature is relatively reduced. This makes it less likely for the loop guide flow channel 11448 to form an overheated region on the refrigerant heat exchange component 1140, resulting in a more balanced temperature distribution on the refrigerant heat exchange component 1140. Then, the upstream flow channel 11442 and the downstream flow channel 11443 form a first uniform temperature region B on the heat exchange surface 1143. As shown in Figure 11, the temperature distribution of the first uniform temperature region B is more balanced.

[0131] Combining the temperature distribution diagram of the refrigerant heat exchange channel in Figure 16, it can be clearly seen that the temperature of the downstream channel 11443, which is adjacent to the upstream channel 11442, is obviously balanced. In Figure 16, the darker the red, the higher the temperature, and the darker the green, the lower the temperature. The size of the numbers reflects the temperature.

[0132] In this embodiment, the upstream flow channel 11442 and the downstream flow channel 11443 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 refrigerant heat exchange component 1140 more uniform, thereby improving the heat exchange uniformity of the battery cell module 1110.

[0133] In some embodiments, as shown in FIG4-9, the refrigerant heat exchange channel 1144 includes a plurality of heat exchange sub-channels 11441 arranged sequentially along a first direction X. Each heat exchange sub-channel 11441 includes an upstream channel 11442 and a downstream channel 11443 that are connected to each other. The upstream channel 11442 in some heat exchange sub-channels 11441 is adjacent to and thermally connected to the downstream channel 11443 in the adjacent heat exchange sub-channel 11441. The downstream channel 11443 in some heat exchange sub-channels 11441 is adjacent to and thermally connected to the upstream channel 11442 in the adjacent heat exchange sub-channel 11441. Each downstream channel 11443 is connected to the loop guide channel 11448.

[0134] Referring to Figures 5 and 7, the refrigerant heat exchange channel 1144 includes multiple heat exchange sub-channels 11441, each of which forms a heat exchange loop. That is, each heat exchange sub-channel 11441 has a heat exchange inlet and a heat exchange outlet. In each heat exchange sub-channel 11441, the upstream channel 11442 is connected to the downstream channel 11443. The end of the upstream channel 11442 away from the downstream channel 11443 forms the heat exchange inlet, and the end of the downstream channel 11443 away from the upstream channel 11442 forms the heat exchange outlet. Thus, the heat exchange medium enters the upstream channel 11442 from the heat exchange inlet, flows to the downstream channel 11443, and then flows into the loop guide channel 11448 from the heat exchange outlet, forming a circulating heat exchange.

[0135] Multiple heat exchange sub-channels 11441 are provided, and these multiple heat exchange sub-channels 11441 are arranged sequentially along a first direction X. 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. The upstream channel 11442 in some heat exchange sub-channels 11441 is adjacent to and thermally connected with the downstream channel 11443 in the adjacent heat exchange sub-channels 11441. Similarly, the downstream channel 11443 in some heat exchange sub-channels 11441 is adjacent to and thermally connected with the upstream channel 11442 in the adjacent heat exchange sub-channels 11441. In other words, the upstream channel 11442 and downstream channel 11443 in two adjacent heat exchange sub-channels 11441 are configured adjacently, and any pair of upstream channels 11442 and downstream channels 11443 can achieve thermal connection (i.e., heat exchange).

[0136] In this embodiment, by setting multiple heat exchange sub-channels 11441, it is beneficial to increase the heat exchange area and make the upstream channel 11442 and the downstream channel 11443 in the adjacent heat exchange sub-channels 11441 conduct heat adjacently. This is beneficial to increase the balanced heat exchange area of ​​the downstream channel 11443 to the upstream channel 11442, making the temperature distribution of the refrigerant heat exchange component 1140 more uniform, thereby improving the heat exchange uniformity of the battery cell assembly 1110.

[0137] In some embodiments, as shown in Figures 4-9, both the upstream flow channel 11442 and the downstream flow channel 11443 extend along a second direction Y, which is perpendicular to the first direction X.

[0138] Specifically, taking the refrigerant heat exchange component 1140 as a plate as an example, the second direction Y is perpendicular to the first direction X and parallel to the plate surface (or 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. It can be seen that the upstream flow channel 11442 and the downstream flow channel 11443 both extend along the second direction Y. The upstream flow channel 11442 and the downstream flow channel 11443 are parallel and spaced apart in the first direction X. The extension direction of the upstream flow channel 11442 and the downstream flow channel 11443 is along the length direction of the plate surface.

[0139] 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.

[0140] In some embodiments, as shown in FIG4-9, multiple upstream flow channels 11442 and downstream flow channels 11443 are provided respectively, with each upstream flow channel 11442 being spaced apart and arranged in parallel, and each downstream flow channel 11443 being spaced apart and arranged in parallel.

[0141] It can be seen that there are multiple upstream flow channels 11442 and multiple downstream flow channels 11443. The multiple upstream flow channels 11442 and multiple downstream flow channels 11443 are arranged parallel to each other and spaced apart. For example, the extension direction of each upstream flow channel 11442 and each downstream flow channel 11443 is along the length direction of the plate surface. The multiple upstream flow channels 11442 and each downstream flow channel 11443 are spaced apart in the width direction of the plate surface. Along the length direction of the plate surface, the upstream flow channels 11442 and the downstream flow channels 11443 are connected at one end.

[0142] In this embodiment, by increasing the number of upstream flow channels 11442 and downstream flow channels 11443 and arranging them adjacent to each other, it is beneficial to increase the heat exchange area of ​​the adjacent region between the upstream flow channels 11442 and downstream flow channels 11443, thereby increasing the heat exchange efficiency.

[0143] In some embodiments, as shown in FIG7 and FIG10, the loop guide channel 11448 includes a plurality of guide sub-channels 11449 extending along the second direction Y and connected to each other, and the plurality of guide sub-channels 11449 are all connected to each downstream channel 11443.

[0144] 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, and the multiple guide sub-channels 11449 are all connected to the outlet end of each downstream channel 11443, so as to improve the flow efficiency and reduce the accumulation and blockage of heat exchange medium.

[0145] 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 refrigerant heat exchange component 1140 more uniform, which is conducive to improving balanced heat dissipation.

[0146] 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.

[0147] In some embodiments, referring to FIG7, along the first direction X, two adjacent guide channels 11449 have a first interval distance L1; multiple upstream channels 11442 are provided and arranged at intervals along the first direction X, and there is a second interval distance L2 between two adjacent upstream channels 11442; multiple downstream channels 11443 are provided and arranged at intervals along the first direction X, and there is a third interval distance L3 between two adjacent downstream channels 11443; the first interval distance L1 is smaller than the second interval distance L2 and the third interval distance L3, and the first direction X is perpendicular to the second direction Y.

[0148] 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.

[0149] 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, so that the area on the refrigerant heat exchange component 1140 corresponding to the multiple guide sub-channels 11449 is as small as possible, so as to reduce the area of ​​the overheated region.

[0150] 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 overheated region corresponding to the loop guide channel 11448 on the refrigerant heat exchange component 1140.

[0151] In some embodiments, as shown in FIG7, the refrigerant heat exchange channel 1144 includes a non-functional area channel 1147 and a functional area channel 1146 connected to each other. The functional area channel 1146 includes an upstream channel 11442, a downstream channel 11443, and a loop guide channel 11448. The non-functional area channel 1147 includes an inlet branch channel 1148 and a loop branch channel 1149. The inlet branch channel 1148 is connected to the upstream channel 11442, and the loop branch channel 1149 is connected to the loop guide channel 11448.

[0152] Generally, the refrigerant heat exchange component 1140 has functional and non-functional areas. The functional area is mainly used for heat exchange with the battery cell assembly 1110, while the non-functional area can be used to divert the heat exchange refrigerant. Specifically, the refrigerant heat exchange channel 1144 includes a non-functional area channel 1147 and a functional area channel 1146 that are connected. The functional area channel 1146 corresponds to the functional area on the refrigerant heat exchange component 1140, and the non-functional area channel 1147 corresponds to the non-functional area on the refrigerant heat exchange component 1140. The functional area channel 1146 includes an upstream channel 11442, a downstream channel 11443, and a loop guide channel 11448. Therefore, it can be seen that the main function of the functional area channel 1146 is for heat exchange with the battery cell assembly 1110.

[0153] 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, which can be 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.

[0154] The loop diversion channel 1149 is connected to the loop guide channel 11448. The loop diversion channel 1149 is used to guide the heat exchange refrigerant flowing out of the loop guide channel 11448 to the outlet position of the refrigerant heat exchange component 1140, and to guide the heat exchange refrigerant in the non-functional area.

[0155] In this embodiment, the separate arrangement of the non-functional flow channel 1147 and the functional flow channel 1146 allows the refrigerant heat exchange component 1140 to form corresponding functional and non-functional areas. The functional area is mainly used for heat exchange of the battery cell assembly 1110, while the non-functional area is mainly used for diverting the heat exchange refrigerant, thereby improving the rationality of the functional design of the refrigerant heat exchange component 1140.

[0156] In some embodiments, as shown with reference to Figures 7 and 8, the non-functional area flow channel 1147 and the functional area flow channel 1146 are configured to be located on opposite sides of a first direction.

[0157] Specifically, the two sides of the first direction refer to the fact that there is an extension axis along the first direction, and 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.

[0158] 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.

[0159] In some embodiments, referring to Figures 7, 8, and 14, 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 respectively connected to each of the upstream channels 11442. The second direction Y is perpendicular to the first direction X.

[0160] 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).

[0161] 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.

[0162] 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.

[0163] 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.

[0164] 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.

[0165] In some embodiments, as shown in FIG6 and FIG7, the non-functional area flow channel 1147 further includes at least one inlet flow channel 11444 and at least one outlet flow channel 11445, wherein each inlet flow channel 11444 is connected to the inlet branch flow channel 1148 and each outlet flow channel 11445 is connected to the loop guide flow channel.

[0166] Specifically, the inlet channel 11444 is the inlet for the heat exchange medium to enter the interior of 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. If the inlets of each upstream channel 11442 are called sub-inlets 114421, then it can be known that after the heat exchange medium enters the inlet channel 11444, it will form multiple branches and connect with multiple sub-inlets 114421. These multiple branches can be understood as multiple inlet branch channels 1148.

[0167] Similarly, the outlet flow channel 11445 is the outlet through which the heat exchange medium flows to the outside of the refrigerant heat exchange component 1140. One or more outlet flow channels 11445 can be provided. One outlet flow channel 11445 can be connected to the loop guide flow channel 11448. If the outlet of each downstream flow channel 11443 is called a sub-outlet 114431, then it can be known that after the heat exchange medium flows out of the sub-outlet 114431, it will be connected to the outlet flow channel 11445 through the loop guide flow channel 11448.

[0168] In this embodiment, one inlet channel 11444 can be connected to multiple upstream channels 11442, and one outlet channel 11445 can be connected to the loop guide channel 11448, and then 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, improve the uniformity of the layout, so as to improve the temperature uniformity of the refrigerant heat exchange component 1140.

[0169] In some embodiments, as shown in Figures 8, 9 and 15, the inlet channel 11444 and the outlet channel 11445 are arranged adjacent to each other.

[0170] 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).

[0171] 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.

[0172] In some embodiments, referring to Figures 2 and 6, the battery device 1100 further includes a frame 1132, a refrigerant heat exchange component 1140 connected to the frame 1132 and together with the frame 1132 forming a receiving cavity 1133, a battery cell assembly 1110 being housed within the receiving cavity 1133, and the refrigerant heat exchange component 1140 being able to support the battery cell assembly 1110; the loop guide channel 11448 at least partially overlaps with the frame 1132 on a projection plane parallel to the heat exchange surface 1143.

[0173] Specifically, the battery device 1100 may include a housing assembly 1130, which includes a frame 1132 and a cover 1131. The cover 1131 and the frame 1132 cover each other, and the cover 1131, the frame 1132, and the 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 assembly 1130 may have various shapes, such as a cylinder or a cuboid.

[0174] Taking a cube-shaped outer frame 1132 as an example, with the frame 1132 placed horizontally and the refrigerant heat exchange component 1140 connected to the bottom of the frame 1132, the frame 1132 has four side walls. The loop guide channel 11448 at least partially overlaps with the frame 1132 on a projection plane parallel to the heat exchange surface 1143. Specifically, a projection plane is defined, which should be a plane parallel to the heat exchange surface 1143, so that both the loop guide channel 11448 and the frame 1132 are projected onto the projection plane. Then, on the projection plane, the loop guide channel... The sidewalls of 11448 and the housing frame 1132 have overlapping areas. It is understood that at least a portion of the loop guide channel 11448 is located below the sidewall in the housing frame 1132. That is, a portion of the loop guide channel 11448 can avoid the battery cell assembly 1110 and is hidden below the housing frame 1132. This helps to ensure that the overheated area on the refrigerant heat exchange component 1140 corresponding to the loop guide channel 11448 avoids the battery cell assembly 1110 as much as possible, thereby reducing the area of ​​the overheated area affecting the battery cell assembly 1110.

[0175] Of course, the loop guide channel 11448 can also be located completely below the side wall of the box frame 1132. That is, the projection of the entire loop guide channel 11448 on the projection plane overlaps with the projection of the box frame 1132 on the projection plane, thereby making the entire loop guide channel 11448 avoid the battery cell assembly 1110 and hide below the side wall of the box frame 1132.

[0176] In this embodiment, the loop guide channel 11448 at least partially overlaps with the box frame 1132 on the projection plane parallel to the heat exchange surface 1143, thereby facilitating the overheating area on the refrigerant heat exchange component 1140 corresponding to the loop guide channel 11448 to avoid the battery cell assembly 1110 as much as possible, so as to reduce the area of ​​the overheating area affecting the battery cell assembly 1110.

[0177] In some embodiments, as shown in FIG4-6, the upstream flow channel 11442 and the downstream flow channel 11443 are arranged at intervals in the first direction X, and both the upstream flow channel 11442 and the downstream flow channel 11443 extend along the second direction Y. 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. Each battery cell 1112 is disposed close to or in contact with the heat exchange surface 1143; the second direction Y is perpendicular to the first direction X.

[0178] 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.

[0179] 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.

[0180] In some embodiments, as shown in Figures 3, 4, and 7, the refrigerant heat exchange component 1140 has a symmetry plane 1145, and the functional area flow channels 1146 are symmetrically arranged about the symmetry plane 1145. An upstream flow channel 11442, a downstream flow channel 11443, and a loop guide flow channel 11448 are distributed on both sides of the symmetry plane 1145.

[0181] Specifically, the functional area flow channel 1146 can be considered as a flow channel group. The flow channel group is formed in a symmetrical arrangement inside the refrigerant heat exchange component 1140. The symmetry plane 1145 should be understood as a virtual surface. 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 a symmetry axis. The symmetry axis should be understood as the symmetry line of the heat exchange surface 1143. The functional area flow channels 1146 on both sides of the symmetry axis are arranged symmetrically. In addition, it can be seen that the battery cell assembly 1110 on both sides of the symmetry axis should also be arranged symmetrically.

[0182] The functional area flow channels 1146 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 channels 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.

[0183] In this embodiment, by symmetrically arranging the 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.

[0184] In some embodiments, as shown in FIG7 and FIG8, the battery device 1100 further includes a connector component 1150, which is connected to the refrigerant heat exchange component 1140 and communicates with the refrigerant heat exchange channel 1144.

[0185] 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 and the loop guide flow channel 11448. 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 surface of the heat exchange surface 1143 of the refrigerant heat exchange component 1140 and is located near the edge.

[0186] In this embodiment, by providing a connector component 1150, it is easy to connect to an external pipeline used for transporting heat exchange medium, thereby improving the ease of assembly.

[0187] In some embodiments, the width of the refrigerant heat exchange channel 1144 ranges from 6 to 15 mm.

[0188] Specifically, since the refrigerant heat exchange channel 1144 includes an upstream channel 11442 and a downstream channel 11443, the width of the refrigerant heat exchange channel 1144 refers to the width dimensions of the upstream channel 11442 and the downstream channel 11443 in a plane parallel to the heat exchange surface 1143 and perpendicular to the extension direction. For example, if the upstream channel 11442 and the downstream channel 11443 both extend along the second direction Y, then the width of the upstream channel 11442 and the downstream channel 11443 refers to the width dimensions of the upstream channel 11442 and the downstream channel 11443 in the first direction X.

[0189] 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.

[0190] 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 pressure drop and flow rate, thus ensuring the stable operation of the thermal management system of the entire battery device.

[0191] In some embodiments, the width of the refrigerant heat exchange channel 1144 ranges from 6 to 10 mm.

[0192] 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.

[0193] 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.

[0194] In some embodiments, the refrigerant heat exchange channel 1144 is filled with a phase change medium.

[0195] 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.

[0196] 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.

[0197] In this embodiment, filling the refrigerant heat exchange channel 1144 with a phase change medium is beneficial to improving the heat exchange efficiency and enhancing the performance stability of the battery device 1100.

[0198] In some embodiments, the refrigerant heat exchange component 1140 is formed from one or more of metals and non-metals.

[0199] 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.

[0200] 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.

[0201] In some embodiments, referring to Figures 9, 12, and 13, the heat exchange surface 1143 has a first region D and a second region C. In a first direction X, the second region C is distributed in the middle of the heat exchange surface 1143, and the first region D is distributed on both sides of the second region C. A plurality of heat exchange sub-channels 11441 correspond to the second region C, and a plurality of heat exchange sub-channels 11441 correspond to the first region D. The flow path from the inlet channel 11444 to the upstream channel 11442 of the plurality of heat exchange sub-channels 11441 corresponding to the second region C is smaller than the flow path from the inlet channel 11444 to the upstream channel 11442 of the plurality of heat exchange sub-channels 11441 corresponding to the first region D.

[0202] 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.

[0203] Of the multiple heat exchange sub-channels 11441, some are configured to correspond to the first region D, and some are configured to correspond to the second region C. That is, the heat exchange sub-channels 11441 corresponding to the first region D are located away from the center of the heat exchange surface 1143. Since the temperature of the corresponding battery cell assembly 1110 is more likely to rise sharply closer to the center of the heat exchange surface 1143 (i.e., the second region C), the heat exchange sub-channels 11441 arranged in this central region need to be able to replenish the heat exchange fluid 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 fluid to flow into the upstream channels 11442 of the second region C more quickly, achieving rapid heat exchange for the battery cell assembly 1110 in this region and reducing the risk of a sharp temperature rise in the battery cell assembly 1110 in the central region.

[0204] 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 fluid to flow in more quickly, improving heat exchange efficiency, and facilitating balanced heat exchange.

[0205] 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.

[0206] In this embodiment, by reducing the flow path of the heat exchange fluid into the upstream flow channel 11442 corresponding to the second region C, the heat exchange fluid 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.

[0207] According to some embodiments of this application, referring to Figures 7-16, this application also provides a refrigerant heat exchange component 1140. The refrigerant heat exchange component 1140 has a refrigerant heat exchange channel 1144 inside. The refrigerant heat exchange channel 1144 includes an upstream channel 11442, a downstream channel 11443, and a loop guide channel 11448. One end of the downstream channel 11443 is connected to the upstream channel 11442, and the other end of the downstream channel 11443 is connected to the loop guide channel 11448. The refrigerant heat exchange component 1140 has a heat exchange surface 1143. The upstream channel 11442 and the downstream channel 11443 are arranged opposite to the heat exchange surface 1143. The loop guide channel 11448 has at least a portion that avoids the heat exchange surface 1143.

[0208] In some embodiments, there is one loop guide channel 11448, which is distributed at one end of the refrigerant heat exchange channel 1144 along the first direction X; or, there are two loop guide channels 11448, which are spaced apart and arranged opposite to each other along the first direction X, with the upstream channel 11442 and the downstream channel 11443 both distributed in the area between the two loop guide channels 11448.

[0209] In some embodiments, the upstream flow channel 11442 and the downstream flow channel 11443 are arranged adjacent to each other.

[0210] In some embodiments, the refrigerant heat exchange channel 1144 includes a plurality of heat exchange sub-channels 11441 arranged sequentially along a first direction X. Each heat exchange sub-channel 11441 includes an upstream channel 11442 and a downstream channel 11443 that are connected to each other. The upstream channel 11442 in some heat exchange sub-channels 11441 is adjacent to and thermally connected to the downstream channel 11443 in the adjacent heat exchange sub-channel 11441. The downstream channel 11443 in some heat exchange sub-channels 11441 is adjacent to and thermally connected to the upstream channel 11442 in the adjacent heat exchange sub-channel 11441. Each downstream channel 11443 is connected to the loop guide channel 11448.

[0211] The example of the refrigerant heat exchange component 1140 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 repeated here. For details, please refer to the description of the battery device 1100 described above.

[0212] According to some embodiments of this application, this application also provides an energy storage device, which includes a plurality of battery devices 1100 as described in the above embodiments, the battery devices 1100 being used to store or provide electrical energy.

[0213] 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.

[0214] 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.

[0215] In some embodiments, the energy storage device is an energy storage container or an energy storage cabinet.

[0216] In some embodiments, the energy storage device may include a cabinet and one or more battery clusters housed within the cabinet.

[0217] 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.

[0218] 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.

[0219] 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.

[0220] 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.

[0221] 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.

[0222] As an example, a power distribution module can be used to distribute power to modules in an energy storage device that require electricity.

[0223] 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.

[0224] In some embodiments, the energy storage system may include one or more energy storage devices and a power conversion system (PCS), wherein the power conversion system is used to connect the power generation device and the energy storage device. The power generation device generates electrical energy, which can be stored in the energy storage device through the power conversion system. As examples, the power generation device may specifically be a solar panel, a hydroelectric power generation device, a thermal power generation device, a wind power generation device, etc. The specific type of power generation device is not limited in this application.

[0225] According to some embodiments of this application, referring to FIG1, this application also provides an electrical device, which includes the battery device 1100 in the above embodiments, the energy storage device in the above embodiments, or the energy storage system in the above embodiments. The battery device 1100 is used to store or provide electrical energy.

[0226] 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.

[0227] 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.

[0228] 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.

[0229] 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.

[0230] Energy storage devices can be located inside the charging pile (e.g., an integrated energy storage and charging unit) or outside the charging pile.

[0231] The above are merely preferred embodiments of this application, and only specifically describe the technical principles of this application. These descriptions are only for explaining the principles of this application and should not be construed as limiting the scope of protection of this application in any way. Based on this explanation, any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application, as well as other specific embodiments of this application that can be conceived by those skilled in the art without creative effort, should be included within the scope of protection of this application.

Claims

1. A battery device (1100), characterized in that, include: Battery cell module (1110); A refrigerant heat exchange component (1140) is configured to exchange heat with the battery cell assembly (1110); the refrigerant heat exchange component (1140) has a refrigerant heat exchange channel (1144) inside, the refrigerant heat exchange channel (1144) including an upstream channel (11442), a downstream channel (11443) and a loop guide channel (11448), one end of the downstream channel (11443) being connected to the upstream channel (11442). The downstream flow channel (11443) is connected to the loop guide flow channel (11448) at the other end. The refrigerant heat exchange component (1140) has a heat exchange surface (1143). The upstream flow channel (11442) and the downstream flow channel (11443) are arranged opposite to the heat exchange surface (1143). The loop guide flow channel (11448) has at least a portion that avoids the battery cell assembly (1110).

2. The battery device (1100) as claimed in claim 1, characterized in that, The loop guide channel (11448) is provided, and is distributed at one end of the refrigerant heat exchange channel (1144) along the first direction (X); or Two loop guide channels (11448) are provided. Along the first direction (X), the two loop guide channels (11448) are spaced apart and arranged opposite to each other. The upstream channel (11442) and the downstream channel (11443) are both distributed in the area between the two loop guide channels (11448).

3. The battery device (1100) as claimed in claim 1, characterized in that, 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).

4. The battery device (1100) as claimed in claim 1, characterized in that, The upstream flow channel (11442), the downstream flow channel (11443), and the loop guide flow channel (11448) are arranged at intervals in the first direction (X). The upstream flow channel (11442), the downstream flow channel (11443), and the loop guide flow channel (11448) all extend along the second direction (Y), which is perpendicular to the first direction (X).

5. The battery device (1100) according to any one of claims 1-4, characterized in that, The upstream flow channel (11442) and the downstream flow channel (11443) are arranged adjacent to each other.

6. The battery device (1100) as claimed in claim 5, characterized in that, The refrigerant heat exchange channel (1144) includes a plurality of heat exchange sub-channels (11441) arranged sequentially along a first direction (X). Each heat exchange sub-channel (11441) includes an upstream channel (11442) and a downstream channel (11443) that are connected to each other. The upstream channel (11442) of some heat exchange sub-channels (11441) is adjacent to and thermally connected to the downstream channel (11443) of the adjacent heat exchange sub-channels (11441). The downstream channel (11443) of some heat exchange sub-channels (11441) is adjacent to and thermally connected to the upstream channel (11442) of the adjacent heat exchange sub-channels (11441). Each downstream channel (11443) is connected to the loop guide channel (11448).

7. The battery device (1100) as claimed in claim 6, characterized in that, Both the upstream flow channel (11442) and the downstream flow channel (11443) extend along a second direction (Y), which is perpendicular to the first direction (X).

8. The battery device (1100) as claimed in claim 5, characterized in that, The upstream flow channel (11442) and the downstream flow channel (11443) are provided in multiples, with each upstream flow channel (11442) spaced apart and arranged in parallel, and each downstream flow channel (11443) spaced apart and arranged in parallel.

9. The battery device (1100) according to any one of claims 1-4, characterized in that, The loop guide channel (11448) includes a plurality of guide sub-channels (11449) extending along the second direction (Y) and connected to each other, and the plurality of guide sub-channels (11449) are all connected to each of the downstream channels (11443).

10. The battery device (1100) as claimed in claim 9, characterized in that, Along the first direction (X), two adjacent guide channels (11449) have a first interval distance (L1); multiple upstream channels (11442) are provided and arranged at intervals along the first direction (X), and two adjacent upstream channels (11442) have a second interval distance (L2); multiple downstream channels (11443) are provided and 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), and the first direction (X) is perpendicular to the second direction (Y).

11. The battery device (1100) according to any one of claims 1-4, characterized in that, The refrigerant heat exchange channel (1144) includes a non-functional area channel (1147) and a functional area channel (1146) that are connected to each other. The functional area channel (1146) includes the upstream channel (11442), the downstream channel (11443), and the loop guide channel (11449). The non-functional area channel (1147) includes an inlet branch channel (1148) and a loop branch channel (1149). The inlet branch channel (1148) is connected to the upstream channel (11442), and the loop branch channel (1149) is connected to the loop guide channel (11448).

12. The battery device (1100) as claimed in claim 11, characterized in that, The non-functional area flow channel (1147) and the functional area flow channel (1146) are configured to be located on both sides of the first direction.

13. The battery device (1100) as claimed in claim 11, characterized in that, 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). The second direction (Y) is perpendicular to the first direction (X).

14. The battery device (1100) as claimed in claim 11, characterized in that, The non-functional area flow channel (1147) further includes at least one inlet flow channel (11444) and at least one outlet flow channel (11445), each of the inlet flow channels (11444) being connected to the inlet branch flow channel (1148), and each of the outlet flow channels (11445) being connected to the loop guide flow channel (11448).

15. The battery device (1100) as claimed in claim 14, characterized in that, The inlet channel (11444) and the outlet channel (11445) are arranged adjacent to each other.

16. The battery device (1100) according to any one of claims 1-4, characterized in that, The battery device (1100) further includes a frame (1132), the refrigerant heat exchange component (1140) is connected to the frame (1132) and together with the frame (1132) forms a receiving cavity (1133), the battery cell assembly (1110) is housed in the receiving cavity (1133), and the refrigerant heat exchange component (1140) can be used to support the battery cell assembly (1110); the circuit guide channel (11448) at least partially overlaps with the frame (1132) on a projection plane parallel to the heat exchange surface (1143).

17. The battery device (1100) according to any one of claims 1-4, characterized in that, The upstream flow channel (11442) and the downstream flow channel (11443) are arranged at intervals in the first direction (X), and both the upstream flow channel (11442) and the downstream flow channel (11443) extend along the second direction (Y). 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). Each battery cell (1112) is arranged close to or in contact with the heat exchange surface (1143). The second direction (Y) is perpendicular to the first direction (X).

18. The battery device (1100) as claimed in claim 11, characterized in that, The refrigerant heat exchange component (1140) has a symmetry plane (1145), and the functional area flow channel (1146) is symmetrically arranged about the symmetry plane (1145). The upstream flow channel (11442), the downstream flow channel (11443), and the loop guide flow channel (11448) are distributed on both sides of the symmetry plane (1145).

19. The battery device (1100) according to any one of claims 1-4, characterized in that, The battery device (1100) further includes a connector component (1150), which is connected to the refrigerant heat exchange component (1140) and communicates with the refrigerant heat exchange channel (1144).

20. A refrigerant heat exchange component (1140), characterized in that, The refrigerant heat exchange component (1140) has a refrigerant heat exchange channel (1144) inside. The refrigerant heat exchange channel (1144) includes an upstream channel (11442), a downstream channel (11443), and a loop guide channel (11448). One end of the downstream channel (11443) is connected to the upstream channel (11442), and the other end of the downstream channel (11443) is connected to the loop guide channel (11448). The refrigerant heat exchange component (1140) has a heat exchange surface (1143). The upstream channel (11442) and the downstream channel (11443) are arranged opposite to the heat exchange surface (1143). The loop guide channel (11448) has at least a portion that avoids the heat exchange surface (1143).

21. The refrigerant heat exchange component (1140) as described in claim 20, characterized in that, The loop guide channel (11448) is provided, and is distributed at one end of the refrigerant heat exchange channel (1144) along the first direction (X); or Two loop guide channels (11448) are provided. Along the first direction (X), the two loop guide channels (11448) are spaced apart and arranged opposite to each other. The upstream channel (11442) and the downstream channel (11443) are both distributed in the area between the two loop guide channels (11448).

22. The refrigerant heat exchange component (1140) as described in claim 20, characterized in that, The upstream flow channel (11442) and the downstream flow channel (11443) are arranged adjacent to each other.

23. The refrigerant heat exchange component (1140) as described in claim 22, characterized in that, The refrigerant heat exchange channel (1144) includes a plurality of heat exchange sub-channels (11441) arranged sequentially along a first direction (X). Each heat exchange sub-channel (11441) includes an upstream channel (11442) and a downstream channel (11443) that are connected to each other. The upstream channel (11442) of some heat exchange sub-channels (11441) is adjacent to and thermally connected to the downstream channel (11443) of the adjacent heat exchange sub-channels (11441). The downstream channel (11443) of some heat exchange sub-channels (11441) is adjacent to and thermally connected to the upstream channel (11442) of the adjacent heat exchange sub-channels (11441). Each downstream channel (11443) is connected to the loop guide channel (11448).

24. An electrical appliance, characterized in that, Includes a battery device (1100) as described in any one of claims 1-19, the battery device (1100) being used to store or provide electrical energy.

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