Battery apparatus, refrigerant heat exchange apparatus, and electrical apparatus

Abstract

The present application belongs to the technical field of battery production, and provides a battery apparatus, a refrigerant heat exchange apparatus, and an electrical apparatus. The battery apparatus comprises a battery cell assembly and a refrigerant heat exchange component. The refrigerant heat exchange component is configured to perform heat exchange with the battery cell assembly. The refrigerant heat exchange component comprises a functional area and a non-functional area, a refrigerant heat exchange flow channel is arranged in the interior of the refrigerant heat exchange component, and the functional area at least coincides with the projection of the battery cell assembly. The cross-sectional area of the refrigerant heat exchange flow channel in the functional area is equal to the cross-sectional area of the refrigerant heat exchange flow channel in the non-functional area. The present application aims to improve the temperature equalization capability of a refrigerant heat exchange component.

Description

Battery device, refrigerant heat exchange device and electric device

[0001] The present application claims priority from the Chinese patent application No. 202420907842.4 filed on April 28, 2024, and entitled "Heat exchange device, battery and electric device", the whole content of which is incorporated herein by reference. TECHNICAL FIELD

[0002] 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 that can exchange heat with the battery monomer assembly is usually arranged in the battery device to cool the battery monomer assembly through heat exchange.

[0003] In the related art, the temperature uniformity of the heat exchange component is poor, and the temperature distribution is uneven, which causes the heat exchange component to have an uneven heat exchange with the battery monomer assembly, thereby affecting the use performance and service life of the battery device. SUMMARY

[0004] The purpose of the embodiments of the present application is to provide a battery device, a refrigerant heat exchange device and an electric device, which aims to solve the technical problem of poor temperature uniformity of the refrigerant heat exchange component in the battery device. TECHNICAL SOLUTION

[0005] The technical solution adopted by the embodiments of the present application is:

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

[0007] a battery monomer assembly;

[0008] a refrigerant heat exchange component configured to exchange heat with the battery monomer assembly, the refrigerant heat exchange component comprising a functional area and a non-functional area, and the refrigerant heat exchange component having a refrigerant heat exchange flow channel inside, and the functional area at least coinciding with the projection of the battery monomer assembly; the cross-sectional area of the refrigerant heat exchange flow channel in the functional area being equal to the cross-sectional area in the non-functional area.

[0009] In the present embodiment, by making the cross-sectional areas of the refrigerant heat exchange flow channels in the functional area and the non-functional area equal, the flow resistance change in the process of the heat exchange refrigerant flow is improved, and the flow resistance is reduced, so that the flow resistance is not prone to sharp fluctuations, thereby reducing the pressure loss (i.e. pressure drop), and further reducing the temperature difference of the refrigerant heat exchange flow channel between the inlet and the outlet, so that the temperature distribution on the refrigerant heat exchange component is more uniform, the temperature uniformity is improved, and the effect of balanced heat exchange of the refrigerant heat exchange component with the battery monomer assembly is improved.

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

[0011] In the embodiment, the width range of the refrigerant heat exchange flow channel is set to 6-15 mm, which can ensure the circulation of the refrigerant under reasonable flow resistance, pressure drop and flow rate, and guarantee the stable operation of the whole battery device thermal management system.

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

[0013] In the embodiment, the width range of 6-10 mm can improve the heat exchange performance of the refrigerant heat exchange component while taking into account the structural strength of the refrigerant heat exchange component, so that the refrigerant heat exchange component will not be weakened in strength due to the excessively wide refrigerant heat exchange flow channel, and the heat exchange performance and structural strength of the refrigerant heat exchange component can be balanced.

[0014] In one of the embodiments, the refrigerant heat exchange flow channel includes a functional area flow channel and a non-functional area flow channel in communication, the functional area flow channel corresponds to form a functional area, and the non-functional area flow channel corresponds to form a non-functional area; the functional area flow channel and the non-functional area flow channel are arranged on both sides of the first direction; the cross-sectional area of the functional area flow channel is equal to the cross-sectional area of the non-functional area flow channel.

[0015] In the embodiment, the functional area flow channel and the non-functional area flow channel are arranged in different regions, which is beneficial to improve the rationality of the flow channel arrangement, so that the functional area flow channel can better exchange heat with the battery monomer assembly.

[0016] In one of the embodiments, the functional area flow channel includes an upstream flow channel and a downstream flow channel in communication, and the non-functional area flow channel includes an inlet branch flow channel and a return branch flow channel, the inlet branch flow channel is in communication with the upstream flow channel, and the return branch flow channel is in communication with the downstream flow channel; the cross-sectional area of the upstream flow channel, the cross-sectional area of the downstream flow channel, the cross-sectional area of the inlet branch flow channel, and the cross-sectional area of the return branch flow channel are all equal.

[0017] In the embodiment, it is beneficial to improve the flow resistance, so as to reduce the pressure loss, that is, to reduce the pressure difference between the outlet position and the inlet position of the refrigerant heat exchange flow channel, so as to reduce the temperature difference between the inlet and the outlet of the refrigerant heat exchange flow channel, thereby making the temperature distribution on the refrigerant heat exchange component more uniform, improving the uniform temperature performance, and further improving the balanced heat exchange effect of the refrigerant heat exchange component on the battery monomer assembly.

[0018] In one of the embodiments, the functional area flow channel includes a plurality of parallelly arranged heat exchange sub-flow channels, each heat exchange sub-flow channel includes an upstream flow channel and a downstream flow channel, the upstream flow channel in part of the heat exchange sub-flow channels is adjacent to and in thermal conduction cooperation with the downstream flow channel in the adjacent heat exchange sub-flow channel, and the downstream flow channel in part of the heat exchange sub-flow channels is adjacent to and in thermal conduction cooperation with the upstream flow channel in the adjacent heat exchange sub-flow channel.

[0019] In the embodiment, the low temperature of the upstream flow channel can balance the high temperature of the downstream flow channel, the temperature of the region on the heat exchange surface corresponding to the downstream flow channel is reduced, so that the superheated region is not easy to form, the area of the superheated region is relatively reduced, the heat exchange effect on the battery monomer assembly is improved, and the temperature distribution on the heat exchange surface of the refrigerant heat exchange component is more uniform, so that the heat exchange uniformity on the battery monomer assembly is improved.

[0020] In one of the embodiments, the plurality of heat exchange sub-flow channels are sequentially arranged along a first direction, and the upstream flow channel and the downstream flow channel in the heat exchange sub-flow channel are both arranged along a second direction.

[0021] In the embodiment, the upstream flow channel and the downstream flow channel are arranged adjacent to each other along the second direction, which is beneficial to increase the length of the adjacent region between the upstream flow channel and the downstream flow channel, and is beneficial to increase the area of the adjacent heat exchange and increase the heat exchange efficiency.

[0022] In one of the embodiments, the inlet flow distribution flow channel includes a first distribution channel and a plurality of second distribution channels, the first distribution channel is arranged along a first direction, each second distribution channel is arranged along a second direction, one extension end of each second distribution channel is arranged in communication with the first distribution channel, and the other extension end of each second distribution channel is arranged in communication with each upstream flow channel respectively; the second direction is perpendicular to the first direction; the cross-sectional area of the first distribution channel and the second distribution channel is equal to the cross-sectional area of the upstream flow channel.

[0023] In the embodiment, the first distribution channel and the second distribution channel are in communication, the first distribution channel is arranged along the first direction to be consistent with the arrangement direction of each heat exchange sub-flow channel, which is beneficial to improve the smoothness of the flow of the heat exchange medium; each second distribution channel is perpendicular to the first distribution channel, and each second distribution channel is opposite to each downstream flow channel, which improves the smoothness of the flow of the heat exchange medium, and is beneficial to reduce the flow path of the heat exchange medium and reduce the heat exchange loss.

[0024] In one of the embodiments, the non-functional region flow channel further includes at least one inlet flow channel and at least one outlet flow channel, the inlet flow channel is in communication with the plurality of upstream flow channels through the inlet flow distribution flow channel, and the outlet flow channel is in communication with the plurality of downstream flow channels through the outlet flow distribution flow channel; the cross-sectional area of the upstream flow channel, the cross-sectional area of the downstream flow channel, the cross-sectional area of the inlet flow distribution flow channel, the cross-sectional area of the outlet flow distribution flow channel, the cross-sectional area of the inlet flow channel, and the cross-sectional area of the outlet flow channel are all equal.

[0025] In the embodiment, one inlet flow channel can correspond to a plurality of upstream flow channels, and one outlet flow channel can correspond to a plurality of downstream flow channels, so as to be beneficial to increase the number of upstream flow channels and downstream flow channels, and to reasonably plan and arrange the layout to improve the uniformity of the layout, so as to be beneficial to improve the uniformity of the heat exchange surface, i.e. the refrigerant heat exchange component.

[0026] In one of the embodiments, the inlet flow channel is arranged adjacent to the outlet flow channel.

[0027] In the embodiment, the adjacent arrangement of the inlet flow channel and the outlet flow channel is conducive to temperature balancing and improves the flow of the heat exchange refrigerant, thereby balancing the temperature difference of the heat exchange surface.

[0028] In one of the embodiments, along the first direction, the inlet flow channel and the outlet flow channel are located on the same side; the functional area flow channel further comprises a loop guide flow channel, each downstream flow channel has a sub-outlet on the side away from the inlet flow channel, and the outlet flow channel is connected in communication with each sub-outlet through the loop branch flow channel and the loop guide flow channel; along the first direction, the loop guide flow channel is located at one end or both ends of the functional area flow channel.

[0029] In the embodiment, by arranging the loop guide flow channel and arranging the loop guide flow channel at one end or both ends of the heat exchange surface along the first direction, that is, arranging the loop guide flow channel at the edge position of the heat exchange surface, the loop guide flow channel corresponds to the battery monomer assembly with relatively low temperature at the edge position, thereby facilitating the reduction of the influence of the overheated area on the battery monomer assembly and facilitating the balanced heat exchange of the battery monomer assembly.

[0030] In one of the embodiments, the loop guide flow channel comprises a plurality of guide sub-flow channels extending along the second direction and connected in communication, and the plurality of guide sub-flow channels are connected in communication between the loop branch flow channel and each sub-outlet.

[0031] In the embodiment, by arranging a plurality of guide sub-flow channels extending along the second direction, the reflux 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.

[0032] In one of the embodiments, along the first direction, two adjacent guide sub-flow channels have a first interval distance; a plurality of upstream flow channels in each heat exchange sub-flow channel are arranged at intervals along the first direction, and two adjacent upstream flow channels have a second interval distance; a plurality of downstream flow channels in each heat exchange sub-flow channel are arranged at intervals along the first direction, and two adjacent downstream flow channels have a third interval distance; the first interval distance is smaller than the second interval distance and the third interval distance.

[0033] In the embodiment, by making the interval distance between the plurality of guide sub-flow channels smaller than the interval distance of the downstream flow channels and the interval distance of the upstream flow channels, the area of the region on the heat exchange surface corresponding to the loop guide flow channel is reduced, and the area of the overheated area is reduced.

[0034] In one of the embodiments, an edge region is formed on the surface of the refrigerant heat exchange component near the edge, and the loop guide flow channel is arranged corresponding to the edge region.

[0035] In the embodiment, the edge region of the refrigerant heat exchange component corresponds to the circuit guide flow channel, and the battery cell assembly corresponding to the edge region with lower temperature is used, so that the uniform heat dissipation of the battery cell assembly is facilitated.

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

[0037] In the embodiment, the battery cell assembly avoids the edge region prone to overheating, so that the influence of overheating on the battery cell assembly is reduced, and the battery cell assembly is protected.

[0038] In one of the embodiments, the refrigerant heat exchange flow channels of the functional region are symmetrically arranged.

[0039] In the embodiment, the symmetrically arranged functional region flow channels are designed, so that the uniform heat dissipation of the refrigerant heat exchange component to the battery cell assembly is facilitated.

[0040] In one of the embodiments, the battery cell assembly includes a plurality of battery cell modules arranged along a first direction, and each battery cell module includes a plurality of battery cells arranged along a second direction.

[0041] In the embodiment, the arrangement of the battery cell assembly matches the arrangement of the refrigerant heat exchange flow channels, so that the uniformity of the heat exchange of the refrigerant heat exchange flow channels to the battery cell assembly is facilitated.

[0042] In one of the embodiments, the refrigerant heat exchange component further includes a box assembly, the box assembly has a containing cavity, and the refrigerant heat exchange component is located in the containing cavity and is arranged on a box bottom of the box assembly to support the battery cell assembly.

[0043] In the embodiment, the refrigerant heat exchange component is placed on the box bottom of the box assembly, so that the bottom heat exchange of the battery cell assembly is realized, the heat exchange area is large, and the heat exchange efficiency is facilitated.

[0044] In one of the embodiments, the refrigerant heat exchange component includes a box body, the refrigerant heat exchange component is connected to the box body and cooperates with the box body to form a containing cavity, and the refrigerant heat exchange component can be used to support the battery cell assembly.

[0045] In the embodiment, the refrigerant heat exchange component can be connected to the box body, and the refrigerant heat exchange component can form a box bottom plate, so that the refrigerant heat exchange component can be used to support the battery cell assembly while performing heat exchange with the battery cell assembly, and the structure of the external box body is facilitated to be simplified, so that the weight of the battery device is facilitated to be reduced.

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

[0047] In the embodiment, the joint part is arranged, so that the joint part is convenient to connect with the pipeline outside for conveying the heat exchange medium, i.e. the heat exchange refrigerant, and the convenience of assembly is improved.

[0048] In a second aspect, the application provides a refrigerant heat exchange device, which comprises the refrigerant heat exchange part in the battery device according to any one of the above.

[0049] In a third aspect, the application provides a power consuming device, which comprises the battery device according to any one of the above, and the battery device is used for storing or providing electric energy.

[0050] The above description is only a summary of the technical scheme of the application, in order to more clearly understand the technical means of the application, and the application can be implemented according to the content of the specification, and in order to make the above and other purposes, characteristics and advantages of the application more obvious and easy to understand, the following specific embodiments of the application are described. BRIEF DESCRIPTION OF DRAWINGS

[0051] In order to more clearly illustrate the technical scheme 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 also obtain other drawings according to these drawings without creating any creative labor.

[0052] Fig. 1 is a structural schematic view of a vehicle provided by some embodiments of the application;

[0053] Fig. 2 is an exploded structural schematic view one of a battery device provided by some embodiments of the application;

[0054] Fig. 3 is an exploded structural schematic view two of a battery device provided by some embodiments of the application;

[0055] Fig. 4 is an exploded structural schematic view of a refrigerant heat exchange part in a battery device provided by some embodiments of the application;

[0056] Fig. 5 is a relative position relationship diagram one of a refrigerant heat exchange flow channel and a battery monomer assembly in a battery device provided by some embodiments of the application;

[0057] Fig. 6 is a relative position relationship diagram two of a refrigerant heat exchange flow channel and a battery monomer assembly in a battery device provided by some embodiments of the application;

[0058] Fig. 7 is a structural schematic view one of a refrigerant heat exchange flow channel on a refrigerant heat exchange part in a battery device provided by some embodiments of the application;

[0059] Fig. 8 is a structural schematic view two of a refrigerant heat exchange flow channel on a refrigerant heat exchange part in a battery device provided by some embodiments of the application;

[0060] Fig. 9 is a schematic view of a structure of a refrigerant heat exchange flow channel on a refrigerant heat exchange component in a battery device according to some embodiments of the present application;

[0061] Fig. 10 is a partial enlarged view of position A in Fig. 9;

[0062] Fig. 11 is a partial enlarged view of position B in Fig. 8;

[0063] Fig. 12 is a partial enlarged view of position C in Fig. 9;

[0064] Fig. 13 is a partial enlarged view of position D in Fig. 9;

[0065] Fig. 14 is a partial enlarged view of position E in Fig. 9;

[0066] Fig. 15 is a partial enlarged view of position F in Fig. 9;

[0067] Fig. 16 is a schematic view of temperature distribution of a refrigerant heat exchange flow channel of a refrigerant heat exchange component in a battery device according to some embodiments of the present application;

[0068] Fig. 17 is a B-B cross-sectional view of Fig. 7;

[0069] Fig. 18 is a C-C cross-sectional view of Fig. 7.

[0070] Legend: 1000, vehicle; 1100, battery device; 1110, battery cell assembly; 1111, battery cell module; 1112, battery cell; 1120, box assembly; 1121, first part; 1122, second part; 11221, frame; 11222, box bottom; 1130, box body; 1131, cover; 1132, box frame; 1133, accommodating cavity; 1140, refrigerant heat exchange component; 1141, first sub-component; 1142, second sub-component; 1143, heat exchange surface; 1144, refrigerant heat exchange flow channel; 11441, heat exchange sub-flow channel; 11442, upstream flow channel; 114421, sub-inlet; 11443, downstream flow channel; 114431, sub-outlet; 11444, inlet flow channel; 11445, outlet flow channel; 11446, first sub-flow channel; 11447, second sub-flow channel; 11448, loop guide flow channel; 11449, guide sub-flow channel; 1145, symmetry plane; 1146, functional area flow channel; 1147, non-functional area flow channel; 1148, inlet sub-flow channel; 1149, loop sub-flow channel; 1150, joint component; 1160, functional area; 1170, non-functional area; 1200, controller; 1300, motor; A, edge area; B, first uniform temperature area; C, second area; D, first area; E, sub-flow area; F, second uniform temperature area; X, first direction; Y, second direction; L1, first interval distance; L2, second interval distance; L3, third interval distance. DETAILED DESCRIPTION

[0071] The embodiments of the present application will be described in detail below with reference to the drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present application, and therefore, should not be used to limit the protection scope of the present application.

[0072] 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 belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the present application; the terms "comprising," "comprises" and "including" as used herein are synonymous with and meant to have the same meaning as the term "including"; the term "coupled" as used herein means the joining of two members together with one or more intervening members.

[0073] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly and specifically limited.

[0074] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearance of the phrase in various places in the specification does not necessarily all refer to the same embodiment, nor is it necessarily independent or alternative embodiments to each other. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0075] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent the three cases of A alone, A and B together, and B alone. In addition, the character " / " in this paper generally represents that the front and rear associated objects are a "or" relationship.

[0076] In the description of the embodiments of the present application, the term "a plurality of" refers to two or more (including two), and similarly, "a plurality of groups" refers to two or more groups (including two groups), and "a plurality of pieces" refers to two or more pieces (including two pieces).

[0077] In the description of the embodiments of the present application, the orientations or positional relationships indicated by 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", "circumferential" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0078] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, the technical terms "mounting", "connecting", "connecting", "fixing" and the like should be understood broadly, for example, can be fixedly connected, or can be detachably connected, or can be integrated; can be mechanically connected, or can be electrically connected; can be directly connected, or can be indirectly connected through an intermediate medium, or can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0079] In recent years, new energy vehicles have made a leap in development, and the market share of new energy vehicles is becoming higher and higher. It is an urgent problem for the new energy vehicle industry to realize energy replenishment quickly and efficiently.

[0080] The battery device in the new energy vehicle will release a lot of heat during the charging and discharging process. The battery device usually has a refrigerant heat exchange component that can exchange heat with the battery monomer assembly, and the heat exchange realizes the cooling of the battery monomer assembly.

[0081] Fast charging is a mainstream solution for new energy vehicles to achieve fast energy replenishment. In the implementation process, many challenges are encountered. A large amount of heat is generated in the electrode assembly during fast charging, which easily leads to a sharp rise in the internal temperature of the battery device. Under the condition of fast charging, the problem of uneven heat exchange of the refrigerant heat exchange component to the battery monomer assembly is more likely to occur, which leads to a sharp rise in the temperature of part of the battery monomer assembly, and a large amount of heat is accumulated in the battery device, thereby affecting the use performance and service life of the battery device, and even causing a great hidden danger in the use of the battery device. Therefore, guaranteeing the balanced heat dissipation, fast heat exchange and improving the consistency of the temperature distribution of the battery device have become the bottleneck of battery thermal management.

[0082] Specifically, the battery device generates heat during charging and discharging. If the heat cannot be effectively dissipated, the performance of the battery device may be reduced, and the service life of the battery device may be shortened. High temperature may cause the internal chemical reaction of the battery device to accelerate, increase the internal resistance of the battery device, reduce the energy density, and even cause thermal runaway. Therefore, the battery device is cooled by the refrigerant heat exchange component.

[0083] For the problem of uneven temperature distribution inside the battery device and local high temperature, it is found through research that for the refrigerant heat exchange component using refrigerant heat exchange, a plurality of refrigerant heat exchange flow channels are provided inside the refrigerant heat exchange component. The refrigerant heat exchange flow channels form functional zones and non-functional zones on the refrigerant heat exchange component. However, in the related art, the cross-sectional area of the refrigerant heat exchange flow channel corresponding to the non-functional zone is larger, and the cross-sectional area of the refrigerant heat exchange flow channel corresponding to the functional zone is smaller than that of the non-functional zone. The small width of the refrigerant heat exchange flow channel may increase the flow resistance of the heat exchange refrigerant. It can be seen that when the heat exchange refrigerant flows from the non-functional zone to the functional zone, the resistance in the flow channel will increase. If the resistance is too large, the heat exchange effect may be reduced. In addition, in the direct cooling heat exchange mode using heat exchange refrigerant, the heat exchange refrigerant gradually changes from liquid or gas-liquid two-phase to single-phase gas during flow. It can be seen that the flow of the heat exchange refrigerant flowing into and out of the refrigerant heat exchange component is the same. When the heat exchange refrigerant changes from liquid to gas, the volume will increase sharply. When the heat exchange refrigerant flows from the non-functional zone to the functional zone, the cross-sectional area of the refrigerant heat exchange flow channel corresponding to the functional zone is reduced, which will inevitably form a large flow resistance, increase the pressure difference between the inlet pressure and the outlet pressure of the refrigerant heat exchange component, and further cause a large temperature difference between the inlet and the outlet of the heat exchange refrigerant. Thus, the temperature distribution on the refrigerant heat exchange component is uneven, the temperature uniformity is poor, and the balanced heat exchange of the battery monomer assembly by the refrigerant heat exchange component is affected, which affects the performance and service life of the battery device.

[0084] Therefore, the present application provides a battery device. The cross-sectional area of the refrigerant heat exchange flow channel inside the refrigerant heat exchange component is equal to that of the non-functional zone, so that the flow resistance of the refrigerant heat exchange flow channel to the heat exchange refrigerant is relatively stable when the heat exchange refrigerant flows from the non-functional zone to the functional zone, and the flow resistance is not prone to sharp fluctuations. This is conducive to reducing the pressure loss (i.e., pressure drop), and further reducing the temperature difference between the inlet and the outlet of the refrigerant heat exchange flow channel. Thus, the temperature distribution on the refrigerant heat exchange component is more uniform, the temperature uniformity is improved, and the balanced heat exchange effect of the battery monomer assembly by the refrigerant heat exchange component is improved.

[0085] Specifically, referring to FIG. 2, the embodiments of the present application provide a battery apparatus 1100, which can include one or more battery cell assemblies 1110 for providing voltage and capacity. The battery cell assembly can include a plurality of battery cells 1112 connected in series, in parallel, or in a mixed connection through a busbar component. The battery apparatus 1100 can also be a battery pack, which generally includes a case assembly and one or more battery cell assemblies 1110 housed in the case assembly.

[0086] The battery apparatus 1100 disclosed by the embodiments of the present application can be used in various energy storage devices and systems using the battery apparatus 1100 as a power source or an energy storage element. The power consumption device can be, but is not limited to, a mobile phone, a portable device, a notebook computer, an electric toy, an electric tool, an electric vehicle, a vehicle, a ship, a spacecraft, etc. Among them, the electric toy can include a fixed or mobile electric toy, such as a game console, an electric car toy, an electric ship toy, and an electric plane toy, etc. The spacecraft can include an airplane, a rocket, a space shuttle, a spacecraft, etc.

[0087] The following embodiments are described for convenience with a vehicle 1000 as an example of a power consumption device of an embodiment of the present application.

[0088] Referring to FIG. 1, FIG. 1 is a structural schematic diagram of a vehicle 1000 provided by some embodiments of the present application. The vehicle 1000 can be a fuel car, a gas car, or a new energy car, which can be a pure electric car, a hybrid car, or an extended-range car, etc. The vehicle 1000 is internally provided with a battery apparatus 1100, which can be arranged at the bottom, the head, or the tail of the vehicle 1000. The battery apparatus 1100 can be used for power supply of the vehicle 1000, for example, the battery apparatus 1100 can be used as an operating power source of the vehicle 1000. The vehicle 1000 can further include a controller 1200 and a motor 1300, the controller 1200 is used to control the battery apparatus 1100 to supply power to the motor 1300, for example, for the working power demand of the vehicle 1000 during starting, navigation, and driving.

[0089] In some embodiments of the present application, the battery apparatus 1100 can not only be used as an operating power source of the vehicle 1000, but also be used as a driving power source of the vehicle 1000, instead of or partially instead of fuel or natural gas to provide driving power for the vehicle 1000.

[0090] Please refer to FIG. 2, which is an exploded view of the battery device 1100 according to some embodiments of the present application. In one embodiment, the battery device 1100 includes a box assembly 1120 and a battery cell assembly 1110. The box assembly 1120 has a receiving cavity 1133 formed therein, and the battery cell assembly 1110 is accommodated in the receiving cavity 1133. The battery cell assembly 1110 is usually formed by arranging a plurality of battery cells 1112, or the battery cell assembly 1110 can also be a battery module formed by arranging and fixing a plurality of battery cells 1112 into an independent module. The box assembly 1120 is configured to provide the receiving cavity 1133 for the battery cell assembly 1110, and the box assembly 1120 can have various structures.

[0091] The battery cell 1112 refers to the smallest unit of the battery device 1100. Each battery cell 1112 can be a secondary battery cell or a primary battery cell, and can also be a lithium-sulfur battery cell, a sodium-ion battery cell, or a magnesium-ion battery cell, but is not limited thereto. The battery cell 1112 can have a cylindrical shape, a flat shape, a cuboid shape, or other shapes.

[0092] According to some embodiments of the present application, referring to FIGS. 2-5, 7, 17, and 18, the battery device 1100 according to the embodiments of the present application includes a battery cell assembly 1110 and a refrigerant heat exchange component 1140. The refrigerant heat exchange component 1140 is configured to exchange heat with the battery cell assembly 1110. The refrigerant heat exchange component 1140 includes a functional area 1160 and a non-functional area 1170, and has a refrigerant heat exchange flow channel 1144 inside. The functional area 1160 at least coincides with the projection of the battery cell assembly 1110. The cross-sectional area of the refrigerant heat exchange flow channel 1144 in the functional area 1160 is equal to the cross-sectional area in the non-functional area 1170.

[0093] 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, so the refrigerant heat exchange component 1140 needs to be arranged close to the battery cell assembly 1110, or directly contact or abut the battery cell assembly 1110, so as to improve the heat exchange effect. When the refrigerant heat exchange component 1140 exchanges heat with the battery cell assembly 1110, a larger 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 close to or in contact with the surface of the battery cell 1112 is formed on the refrigerant heat exchange component 1140.

[0094] The surface of the battery cell 1112 close to or in contact with the heat exchange surface 1143 can be the bottom surface of the battery cell 1112 or the side surface of the battery cell 1112. For example, when the battery device 1100 is horizontally placed, the surface below the battery cell 1112 is the bottom surface, and the surface of the battery cell 1112 in 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, 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 referred to as a heat exchange bottom plate or a cooling bottom plate.

[0095] For convenience of description, the following embodiments are described by taking the battery device 1100 of an embodiment of the present application as an example, and the refrigerant heat exchange component 1140 is located at the bottom of the battery cell assembly 1110.

[0096] For the refrigerant heat exchange flow channel 1144 inside the refrigerant heat exchange component 1140, referring to FIGS. 4 and 5, the refrigerant heat exchange flow channel 1144 can be a hole structure inside the refrigerant heat exchange component 1140. For example, the refrigerant heat exchange component 1140 is in the form of a plate, and a through-hole structure or a cavity structure with a certain extension length and extension path is formed in the plate of the refrigerant heat exchange component 1140, and the through-hole structure or the cavity structure forms the refrigerant heat exchange flow channel 1144. The refrigerant heat exchange component 1140 can be formed in one piece, and the refrigerant heat exchange flow channel 1144 can be formed by gas-assisted or water-assisted molding. Alternatively, the refrigerant heat exchange component 1140 can also be formed by combined molding. For example, the refrigerant heat exchange component 1140 includes a first sub-component 1141 and a second sub-component 1142, the second sub-component 1142 has a groove structure with a predetermined extension length and extension shape, the groove structure is formed by stamping, the first sub-component 1141 is fixedly or detachably connected to the second sub-component 1142, and the groove structure is closed to form a through-hole structure or a cavity structure, that is, the refrigerant heat exchange flow channel 1144. The refrigerant heat exchange flow channel 1144 should be close to the heat exchange surface 1143, and the extension path of the refrigerant heat exchange flow channel 1144 can be parallel to the heat exchange surface 1143 to increase the heat exchange effect.

[0097] For example, the first sub-component 1141 can be an upper plate, the second sub-component 1142 can be a lower plate, and the refrigerant heat exchange flow channel 1144 is formed on the lower plate by stamping. The first sub-component 1141 and the second sub-component 1142 can be welded by brazing, and the welded area can have a heat transfer function.

[0098] Generally, the refrigerant heat exchange component 1140 has a functional area 1160 and a non-functional area 1170, wherein the functional area 1160 is mainly used for heat exchange with the battery cell assembly 1110, and the non-functional area 1170 can be used for distributing the heat exchange refrigerant, and the refrigerant heat exchange flow channel 1144 is distributed in the functional area 1160 and the non-functional area 1170.

[0099] The cross-sectional area of the refrigerant heat exchange flow channel 1144 refers to the cross-sectional area of a single flow channel, for example, the refrigerant heat exchange flow channel 1144 has only one independent first channel in the non-functional area 1170, and the refrigerant heat exchange flow channel 1144 also has only one independent second channel in the functional area 1160, then the cross-sectional area of the refrigerant heat exchange flow channel 1144 in the functional area 1160 is equal to the cross-sectional area in the non-functional area 1170, which should be understood as that the cross-sectional area of the first channel is equal to the cross-sectional area of the second channel, and when the cross sections of the first channel and the second channel are circular, the cross-sectional area of the first channel is equal to the cross-sectional area of the second channel can also be understood as that the diameter of the first channel is equal to the diameter of the second channel.

[0100] Of course, it should be further pointed out that in the non-functional area 1170, the refrigerant heat exchange flow channel 1144 can include a plurality of the above-mentioned first channels in the form of structure, and in the functional area 1160, the refrigerant heat exchange flow channel 1144 can include a plurality of the above-mentioned second channels in the form of structure, and the cross-sectional area of the refrigerant heat exchange flow channel 1144 in the functional area 1160 is equal to the cross-sectional area in the non-functional area 1170, which should be understood as that the cross-sectional area of each first channel is equal to the cross-sectional area of each second channel, and when the cross sections of the first channel and the second channel are circular, the cross-sectional area of the first channel is equal to the cross-sectional area of the second channel can also be understood as that the diameter of each first channel is equal to the diameter of each second channel.

[0101] The above design of the cross-sectional area of the refrigerant heat exchange flow channel 1144 makes the cross-sectional area of each channel remain the same when the heat exchange refrigerant flows in the functional area 1160 and the non-functional area 1170, makes the cross-sectional area of each part of the refrigerant heat exchange flow channel 1144 consistent, thereby keeping the consistency of the flow resistance of each part of the refrigerant heat exchange flow channel 1144, making the influence of the refrigerant heat exchange flow channel 1144 on the flow resistance of the heat exchange refrigerant relatively stable, and the flow resistance is not easy to fluctuate sharply, thereby being beneficial to reduce the pressure loss (i.e. pressure drop), that is, to reduce the pressure difference between the outlet position and the inlet position of the refrigerant heat exchange flow channel 1144, so as to be beneficial to reduce the temperature difference between the inlet and the outlet of the refrigerant heat exchange flow channel 1144.

[0102] In the embodiment, by equalizing the cross-sectional area of the refrigerant heat exchange flow channel 1144 in the functional area 1160 and the non-functional area 1170, the variation of flow resistance in the refrigerant heat exchange flow process is improved, the flow resistance is reduced, the flow resistance is not prone to sharp fluctuations, the pressure loss (i.e. pressure drop) is reduced, the temperature difference between the inlet and the outlet of the refrigerant heat exchange flow channel 1144 is reduced, the temperature distribution on the refrigerant heat exchange component is more uniform, the uniform temperature performance is improved, and the effect of the refrigerant heat exchange component on the balanced heat exchange of the battery monomer assembly is improved.

[0103] In some embodiments, the width of the refrigerant heat exchange flow channel 1144 is greater than or equal to 6 mm and less than or equal to 15 mm.

[0104] Specifically, the refrigerant heat exchange flow channel 1144 can include one or more independent or connected channels, and the width of the refrigerant heat exchange flow channel 1144 is greater than or equal to 6 mm and less than or equal to 15 mm, which means that the width of one channel is greater than or equal to 6 mm and less than or equal to 15 mm, for example, the width of the first channel and the second channel described above is greater than or equal to 6 mm and less than or equal to 15 mm.

[0105] Since the cross-sectional shape of the refrigerant heat exchange flow channel 1144 can be various shapes, such as circular, elliptical, polygonal, etc., for example, if the cross-sectional shape of the refrigerant heat exchange flow channel 1144 is circular, the width of the refrigerant heat exchange flow channel 1144 is greater than or equal to 6 mm and less than or equal to 15 mm, which means that the diameter of the refrigerant heat exchange flow channel 1144 is greater than or equal to 6 mm and less than or equal to 15 mm; for example, if the cross-sectional shape of the refrigerant heat exchange flow channel 1144 is elliptical, the width of the refrigerant heat exchange flow channel 1144 is greater than or equal to 6 mm and less than or equal to 15 mm, which means that the length of the major axis or the minor axis of the refrigerant heat exchange flow channel 1144 is greater than or equal to 6 mm and less than or equal to 15 mm; for example, if the cross-sectional shape of the refrigerant heat exchange flow channel 1144 is rectangular, the width of the refrigerant heat exchange flow channel 1144 is greater than or equal to 6 mm and less than or equal to 15 mm, which means that the length or width of the rectangle is greater than or equal to 6 mm and less than or equal to 15 mm.

[0106] In addition, on the refrigerant heat exchange component 1140, there is generally a heat exchange surface 1143, which should be arranged opposite and close to the battery monomer assembly 1110, and the extension trajectory of the refrigerant heat exchange flow channel 1144 should be arranged along a plane parallel to the heat exchange surface 1143, then, for the width of the refrigerant heat exchange flow channel 1144, it can be generally understood as the maximum cross-sectional width of the refrigerant heat exchange flow channel 1144 in the plane parallel to the heat exchange surface 1143.

[0107] If the width of the refrigerant heat exchange flow channel 1144 is too small, the flow resistance of the refrigerant will increase, and the heat exchange effect will decrease. If the width of the refrigerant heat exchange flow channel 1144 is too large, the flow rate of the refrigerant will be too slow, and the heat cannot be removed in time.

[0108] In this embodiment, the width of the refrigerant heat exchange flow channel 1144 is set to be 6-15 mm. This width range can ensure that the refrigerant circulates at a reasonable flow resistance, pressure drop, and flow rate, and can ensure stable operation of the thermal management system of the entire battery device.

[0109] In some embodiments, the width of the refrigerant heat exchange flow channel 1144 is greater than or equal to 6 mm and less than or equal to 10 mm.

[0110] Similarly, as described in the above embodiments, if the width of the refrigerant heat exchange flow channel 1144 is too large or too small, the heat exchange of the battery monomer assembly 1110 by the refrigerant heat exchange component 1140 will be affected. Therefore, further tests are performed, and the width range of the refrigerant heat exchange flow channel 1144 is set to be 6-10 mm, so that the width data of the refrigerant heat exchange flow channel 1144 is more accurate.

[0111] In this embodiment, the width range of 6-10 mm can improve the heat exchange performance of the refrigerant heat exchange component 1140 while also considering the structural strength of the refrigerant heat exchange component 1140. The refrigerant heat exchange component 1140 will not be weakened due to the excessive width of the refrigerant heat exchange flow channel 1144, and the heat exchange performance and structural strength of the refrigerant heat exchange component 1140 can be balanced.

[0112] In some embodiments, the refrigerant heat exchange flow channel 1144 is filled with a phase change medium.

[0113] Specifically, the phase change medium is a substance that can change phase at a specific temperature and absorb or release a large amount of latent heat during the phase change. In this example, the heat exchange medium is a phase change medium. When the battery monomer assembly 1110 generates a large amount of heat during charging and discharging, the phase change medium in the refrigerant heat exchange flow channel 1144 absorbs heat and changes phase, slowing the rapid temperature rise of the battery device 1100. When the temperature of the battery device 1100 decreases, the phase change medium releases heat, slowing the decrease in battery temperature and affecting performance. The use of a phase change medium as a heat exchange medium helps to keep the temperature of the battery device 1100 relatively stable, reduces the problem of capacity decay and shortens the life of the battery device 1100 due to excessive temperature, or the problem of increased internal resistance and reduced charging and discharging efficiency of the battery device 1100 due to low temperature, thereby improving the overall performance, reliability, and stability of the battery device 1100.

[0114] It should be noted that the phase change medium and the refrigerant can work together. For example, in a large battery energy storage system, the refrigerant is responsible for transferring the heat generated by the battery monomer assembly 1110 from the battery module to the heat dissipation end of the entire thermal management system, and the phase change medium is arranged inside the battery module. When the battery monomer assembly 1110 generates a large amount of heat in a short time, the phase change medium rapidly absorbs heat and changes phase, alleviating the rapid rise in temperature and giving the refrigerant more time to dissipate heat. The two work together to improve the efficiency and stability of the thermal management system.

[0115] In the present embodiment, the phase change medium is filled in the refrigerant heat exchange flow channel 1144, which is beneficial to improve the efficiency of heat exchange and improve the performance stability of the battery device 1100.

[0116] In some embodiments, the refrigerant heat exchange component 1140 is prepared from a combination of one or more of metal, non-metal, etc.

[0117] Specifically, metal materials have good thermal conductivity, such as copper, aluminum, etc., which can quickly conduct heat, so that the refrigerant heat exchange component 1140 can efficiently transfer the heat generated by the battery monomer assembly 1110. Non-metallic materials, such as ceramics, have unique thermal performance advantages. For example, some ceramic materials have high-temperature resistance characteristics and can still maintain stable thermal conductivity performance in high-temperature environments. The combination of metal and non-metal can fully utilize their respective thermal conductivity advantages, so that the refrigerant heat exchange component 1140 can always maintain high-efficiency thermal conductivity under different working temperature ranges and thermal load conditions, thereby improving the overall performance of the battery thermal management system.

[0118] In the present embodiment, the material selection of the refrigerant heat exchange component 1140 is more flexible and variable, and 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 high-efficiency thermal conductivity, thereby improving the overall performance of the battery thermal management system.

[0119] In some embodiments, referring to FIGS. 2-9, the refrigerant heat exchange flow channel 1144 includes a functional zone flow channel 1146 and a non-functional zone flow channel 1147 connected in communication. The functional zone flow channel 1146 corresponds to a functional zone, and the non-functional zone flow channel 1147 corresponds to a non-functional zone. The functional zone flow channel 1146 and the non-functional zone flow channel 1147 are configured to be located on both sides of the first direction. The cross-sectional area of the functional zone flow channel 1146 is equal to the cross-sectional area of the non-functional zone flow channel 1147.

[0120] The refrigerant heat exchange flow channel 1144 has a heat exchange surface 1143. In the functional area 1160, the functional area flow channel 1146 is formed on the refrigerant heat exchange component 1140 corresponding to the heat exchange surface 1143. The heat exchange surface can be a part of an area of one side of the plate-shaped refrigerant heat exchange component 1140. The first direction X should be understood as any direction parallel to the heat exchange surface 1143. For example, the heat exchange surface 1143 has a length direction or a width direction. The first direction X can refer to the length direction or the width direction parallel to the heat exchange surface 1143.

[0121] Since the refrigerant heat exchange flow channel 1144 in the functional area 1160 is mainly used for heat exchange with the battery monomer assembly 1110, the refrigerant heat exchange flow channel 1144 in the functional area is defined as the functional area flow channel 1146. Since the refrigerant heat exchange flow channel 1144 in the non-functional area 1170 is mainly used for distributing and distributing the heat exchange refrigerant, so that the heat exchange refrigerant can be more evenly distributed into the functional area flow channel 1146, the refrigerant heat exchange flow channel 1144 in the non-functional area is defined as the non-functional area flow channel 1147. The functional area flow channel 1146 and the non-functional area flow channel 1147 should be connected and arranged.

[0122] The two sides of the first direction refer to setting an extension axis along the first direction. The two sides are the two sides of the extension axis, that is, the refrigerant heat exchange component 1140 has the non-functional area flow channel 1147 on one side of the extension axis and the functional area flow channel 1146 on the other side of the extension axis. The functional area flow channel 1146 and the non-functional area flow channel 1147 are arranged in communication at the position of the extension axis.

[0123] In this example, the cross-sectional area of the refrigerant heat exchange flow channel 1144 in the functional area is equal to the cross-sectional area in the non-functional area. It should be understood that the cross-sectional area of the functional area flow channel 1146 is equal to the cross-sectional area of the non-functional area flow channel 1147. It should be further pointed out that the functional area flow channel 1146 can include multiple independent or interconnected channels, for example, a first channel. The non-functional area flow channel 1147 can include multiple independent or interconnected channels, for example, a second channel. It can be known that the cross-sectional area of each first channel should be equal to the cross-sectional area of each second channel.

[0124] In this embodiment, the functional area flow channel 1146 and the non-functional area flow channel 1147 are arranged in different regions, which is beneficial to improve the rationality of the flow channel arrangement and make the functional area flow channel 1146 better heat exchange with the battery monomer assembly 1110.

[0125] In some embodiments, referring to FIGS. 2-9, the functional zone flow channel 1146 includes an upstream flow channel 11442 and a downstream flow channel 11443 in communication, the non-functional zone flow channel 1147 includes an inlet branch flow channel 1148 and a return branch flow channel 1149, the inlet branch flow channel 1148 is in communication with the upstream flow channel 11442, and the return branch flow channel 1149 is in communication with the downstream flow channel 11443; the cross-sectional area of the upstream flow channel 11442, the cross-sectional area of the downstream flow channel 11443, the cross-sectional area of the inlet branch flow channel 1148, and the cross-sectional area of the return branch flow channel 1149 are all equal.

[0126] The upstream flow channel 11442 and the downstream flow channel 11443 can be understood as an independent channel on the refrigerant heat exchange component 1140 corresponding to a functional zone, for example, the upstream flow channel 11442 and the downstream flow channel 11443 can be understood as the two first channels described above. The inlet branch flow channel 1148 and the return branch flow channel 1149 can be understood as an independent channel on the refrigerant heat exchange component 1140 corresponding to a non-functional zone, for example, the inlet branch flow channel 1148 and the return branch flow channel 1149 can be understood as the two second channels described above.

[0127] Since the functional zone is mainly used for heat exchange with the battery monomer assembly 1110, it can be known that the main role of the upstream flow channel 11442 and the downstream flow channel 11443 is to exchange heat with the battery monomer assembly 1110, and since the heat exchange medium uses heat exchange refrigerant, the refrigerant heat exchange component 1140 uses a direct cooling heat exchange mode. The process of heat exchange of the refrigerant heat exchange component 1140 is that the heat exchange medium changes from liquid to gas after entering the upstream flow channel 11442 for heat exchange, the amount of liquid heat exchange refrigerant in the upstream flow channel 11442 is large, the phase change heat is large, the heat exchange capacity for the battery monomer assembly 1110 is strong, and the heat exchange refrigerant enters the downstream flow channel 11443 from the upstream flow channel 11442, and the heat exchange refrigerant in the downstream flow channel 11443 is partially or completely gasified, and the heat exchange capacity for the battery monomer assembly 1110 will decrease. And in the process of heat exchange refrigerant entering the downstream flow channel 11443 from the upstream flow channel 11442, the volume of the heat exchange refrigerant will gradually increase due to gasification.

[0128] Therefore, considering the change of the heat exchange capacity and volume of the heat exchange refrigerant during the process from the upstream flow channel 11442 to the downstream flow channel 11443, the cross-sectional area of the upstream flow channel 11442 and the cross-sectional area of the downstream flow channel 11443 should be equal, so as to facilitate reducing the change of flow resistance of the heat exchange refrigerant during the process from the upstream flow channel 11442 to the downstream flow channel 11443, and reducing the flow resistance, thereby reducing the pressure loss, and further reducing the temperature difference between the inlet of the upstream flow channel 11442 and the outlet of the downstream flow channel 11443, so that the temperature distribution corresponding to the functional area on the refrigerant heat exchange component is more uniform, the temperature uniformity is improved, and the effect of the refrigerant heat exchange component on the balanced heat exchange of the battery monomer assembly is improved.

[0129] 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 return branch flow channel 1149. The inlet branch flow channel 1148 is in communication with the upstream flow channel 11442. It can be known that the inlet branch flow channel 1148 is mainly used for inputting the heat exchange refrigerant into the upstream flow channel 11442. The inlet branch flow channel 1148 can include a plurality of flow channel branches (such as a plurality of second channels), so that each flow channel branch is in communication with each upstream flow channel 11442 one by one, so that the heat exchange refrigerant entering each upstream flow channel 11442 is more uniform, and the temperature distribution uniformity on the refrigerant heat exchange component 1140 is improved. The return branch flow channel 1149 is in communication with the outlet of the downstream flow channel 11443, and guides the heat exchange refrigerant flowing out of the downstream flow channel 11443 to the outlet position of the refrigerant heat exchange component 1140, and guides the heat exchange refrigerant in the non-functional area.

[0130] Since the heat exchange refrigerant exists different degrees of volume change during the process of entering the upstream flow channel 11442 from the inlet branch flow channel 1148 and the process of entering the return branch flow channel 1149 from the downstream flow channel 11443, considering the influence of the volume change on the flow resistance, the cross-sectional area of the inlet branch flow channel 1148 is equal to the cross-sectional area of the upstream flow channel 11442, and the cross-sectional area of the return branch flow channel 1149 is equal to the cross-sectional area of the downstream flow channel 11443, that is, the cross-sectional area of the upstream flow channel 11442, the cross-sectional area of the downstream flow channel 11443, the cross-sectional area of the inlet branch flow channel 1148 and the cross-sectional area of the return branch flow channel 1149 are all equal, so as to facilitate improving the flow resistance problem in the entire refrigerant heat exchange flow channel 1144.

[0131] In the embodiment, the cross-sectional areas of the upstream flow channel 11442, the downstream flow channel 11443, the inlet branch flow channel 1148, and the return branch flow channel 1149 are equal, which is conducive to improving the flow resistance and reducing the pressure loss, i.e., reducing the pressure difference between the outlet and the inlet of the refrigerant heat exchange flow channel 1144, thereby reducing the temperature difference between the inlet and the outlet of the refrigerant heat exchange flow channel 1144, making the temperature distribution on the refrigerant heat exchange component 1140 more uniform, improving the uniform temperature performance, and further improving the effect of the refrigerant heat exchange component 1140 on the balanced heat exchange of the battery monomer assembly 1110.

[0132] In some embodiments, referring to FIGS. 2-5, the functional area flow channel 1146 includes a plurality of heat exchange sub-flow channels 11441 arranged in parallel, each heat exchange sub-flow channel 11441 including an upstream flow channel 11442 and a downstream flow channel 11443, the upstream flow channel 11442 of some heat exchange sub-flow channels 11441 being adjacent to and in thermal contact with the downstream flow channel 11443 of adjacent heat exchange sub-flow channels 11441, and the downstream flow channel 11443 of some heat exchange sub-flow channels 11441 being adjacent to and in thermal contact with the upstream flow channel 11442 of adjacent heat exchange sub-flow channels 11441.

[0133] Referring to FIGS. 5 and 7, the functional area flow channel 1146 includes a plurality of heat exchange sub-flow channels 11441, each heat exchange sub-flow channel 11441 forming a heat exchange loop, i.e., each heat exchange sub-flow channel 11441 has a heat exchange inlet and a heat exchange outlet. In each heat exchange sub-flow channel 11441, the upstream flow channel 11442 is in communication with the downstream flow channel 11443, the end of the upstream flow channel 11442 away from the downstream flow channel 11443 forms the heat exchange inlet, and the end of the downstream flow channel 11443 away from the upstream flow channel 11442 forms the heat exchange outlet, so that the heat exchange medium enters the upstream flow channel 11442 through the heat exchange inlet, then flows to the downstream flow channel 11443, and then flows out through the heat exchange outlet, forming a circulating heat exchange.

[0134] Suppose that the downstream flow channels 11443 of the plurality of heat exchange sub-flow channels 11441 are concentratedly arranged, the refrigerant heat exchange component 1140 will form a large area of overheated region on the heat exchange surface 1143 region corresponding to the downstream flow channel 11443. The overheated region refers to a region with weak heat exchange capacity. A large overheated region area will affect the overall heat exchange effect of the battery monomer assembly 1110, causing the temperature of the battery monomer assembly 1110 to rise, and further affecting the use performance and service life of the battery monomer assembly 1110 and the battery device 1100.

[0135] The overheat problem is analyzed. Since the heat exchange capacity of the heat exchange medium in the upstream flow channel 11442 is strong, the temperature of the region on the heat exchange surface 1143 corresponding to the upstream flow channel 11442 is low, the heat exchange capacity of the heat exchange medium in the downstream flow channel 11443 is relatively weak, and the temperature of the region on the heat exchange surface 1143 corresponding to the downstream flow channel 11443 is high, in order to reduce the area of the overheat region, the plurality of heat exchange sub-flow channels 11441 in the heat exchange medium flow channel 1144 are arranged side by side, and the upstream flow channel 11442 in part of the heat exchange sub-flow channel 11441 is adjacent to and in thermal contact with the downstream flow channel 11443 in the adjacent heat exchange sub-flow channel 11441, and the downstream flow channel 11443 in part of the heat exchange sub-flow channel 11441 is adjacent to and in thermal contact with the upstream flow channel 11442 in the adjacent heat exchange sub-flow channel 11441, that is, the upstream flow channel 11442 and the downstream flow channel 11443 in the two adjacent heat exchange sub-flow channels 11441 are arranged adjacent to each other, adjacent means that the upstream flow channel 11442 and the downstream flow channel 11443 are directly connected in space (without spacing) or only have a very small spacing; thermal contact means that the upstream flow channel 11442 and the downstream flow channel 11443 can conduct heat (or exchange heat) between them, which can also be understood as the upstream flow channel 11442 and the downstream flow channel 11443 being arranged adjacent to each other, so that the region on the heat exchange surface 1143 corresponding to the upstream flow channel 11442 can conduct heat (or exchange heat) with the region on the heat exchange surface 1143 corresponding to the downstream flow channel 11443.

[0136] Therefore, the upstream flow channel 11442 and the downstream flow channel 11443 are in thermal contact, the low temperature of the upstream flow channel 11442 balances the high temperature of the downstream flow channel 11443, that is, the low temperature region on the heat exchange surface 1143 corresponding to the upstream flow channel 11442 balances the high temperature of the high temperature region on the heat exchange surface 1143 corresponding to the downstream flow channel 11443, thereby reducing the temperature difference of the heat exchange surface 1143 on the heat exchange medium component 1140, and therefore the temperature of the region on the heat exchange surface 1143 corresponding to the downstream flow channel 11443 adjacent to the upstream flow channel 11442 is not easy to rise, and the temperature is relatively low, thereby preventing the formation of an overheat region, and making the temperature distribution on the heat exchange surface 1143 more uniform. Therefore, the upstream flow channel 11442 and the downstream flow channel 11443 in the two adjacent heat exchange sub-flow channels 11441 form a first uniform temperature region B on the heat exchange surface 1143, and the temperature distribution of the first uniform temperature region B is more uniform, as shown in FIG. 11.

[0137] It should be noted that the upstream flow channel 11442 and the downstream flow channel 11443 in the plurality of heat exchange sub-flow channels 11441 are opposite to the heat exchange surface 1143, and 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 exchanges heat with the battery monomer assembly 1110.

[0138] The battery monomer assembly 1110 can be in direct contact with the heat exchange surface 1143 of the refrigerant heat exchange component 1140 for heat exchange, or the battery monomer assembly 1110 is arranged to be spaced apart from the heat exchange surface 1143, and the battery monomer assembly 1110 is arranged close to the heat exchange surface 1143, so that the refrigerant heat exchange component 1140 can exchange heat between the heat exchange surface 1143 and the battery monomer assembly 1110, thereby achieving the purpose of cooling the battery monomer assembly 1110.

[0139] In combination with the temperature distribution of the refrigerant heat exchange flow channel 1144 in FIG. 16, it can be found that the temperature of the downstream flow channel 11443 adjacent to the upstream flow channel 11442 is obviously balanced. In FIG. 16, the deeper the red color, the higher the temperature, the deeper the green color, the lower the temperature, and the size of the number reflects the high and low of the temperature.

[0140] In this embodiment, the upstream flow channel 11442 and the downstream flow channel 11443 in the two heat exchange sub-flow channels 11441 are arranged adjacent to each other, so that the low temperature of the upstream flow channel 11442 can balance the high temperature of the downstream flow channel 11443, and the temperature of the region on the heat exchange surface 1143 corresponding to the downstream flow channel 11443 is reduced, so that the overheating area is not easy to form, and the area of the overheating area is relatively reduced, which is beneficial to improve the heat exchange effect of the battery monomer assembly 1110 and make the temperature distribution on the heat exchange surface 1143 of the refrigerant heat exchange component 1140 more uniform, so as to improve the heat exchange uniformity of the battery monomer assembly 1110.

[0141] In some embodiments, referring to FIGS. 5 and 6, the plurality of heat exchange sub-flow channels 11441 are arranged in sequence along a first direction, and the upstream flow channel 11442 and the downstream flow channel 11443 in the heat exchange sub-flow channel 11441 are arranged in extension along a second direction Y perpendicular to the first direction X.

[0142] 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.

[0143] Specifically, the first direction X is parallel to the heat exchange surface 1143. Taking the refrigerant heat exchange component 1140 as an example, the refrigerant heat exchange component 1140 is in a plate shape, and one side plate surface of the refrigerant heat exchange component 1140 forms the heat exchange surface 1143. When the first direction X is the width direction of the plate surface, the second direction Y is the length direction of the plate surface. The upstream flow channel 11442 and the downstream flow channel 11443 are both arranged along the second direction Y. It can be seen that the upstream flow channel 11442 and the downstream flow channel 11443 are parallel and spaced apart, and the extension directions of the upstream flow channel 11442 and the downstream flow channel 11443 are both along the length direction of the plate surface. One heat exchange sub-flow channel 11441 can include a plurality of upstream flow channels 11442 and a plurality of downstream flow channels 11443. Along the second direction Y, the upstream flow channel 11442 and the downstream flow channel 11443 are connected at one end.

[0144] In the embodiment, the upstream flow channel 11442 and the downstream flow channel 11443 are arranged adjacent to each other along the second direction Y, which is beneficial to increase the length of the adjacent region between the upstream flow channel 11442 and the downstream flow channel 11443, and is beneficial to increase the area of adjacent heat exchange and increase the heat exchange efficiency.

[0145] In some embodiments, referring to FIGS. 7, 8 and 14, the inlet branch flow channel 1148 includes a first branch channel 11446 and a plurality of second branch channels 11447. The first branch channel 11446 is arranged along the first direction X. Each second branch channel 11447 is arranged along the second direction Y. One extension end of each second branch channel 11447 is arranged in communication with the first branch channel 11446. The other extension end of each second branch channel 11447 is arranged in communication with each upstream flow channel 11442, respectively. The second direction Y is perpendicular to the first direction X. The cross-sectional areas of the first branch channel 11446 and the second branch channels 11447 are the same as the cross-sectional area of the upstream flow channel 11442.

[0146] Specifically, the first branch channel 11446 and each second branch channel 11447 are arranged in communication. The heat exchange medium first passes through the first branch channel 11446, and then enters each second branch channel 11447, and then enters each corresponding upstream flow channel 11442 through each second branch channel 11447, respectively. The first branch channel 11446 and the second branch channels 11447 correspond to form a branch region E on the heat exchange surface 1143 (or the surface of the refrigerant heat exchange component 1140).

[0147] The first sub-flow passage 11446 can be provided with one or more, and one first sub-flow passage 11446 is respectively connected with a plurality of second sub-flow passages 11447. The first sub-flow passage 11446 extends along the first direction X, and the extension length direction of the first sub-flow passage 11446 is the same as the arrangement direction of each heat exchange sub-flow passage 11441, so that the heat exchange medium flows more smoothly in the first sub-flow passage 11446, and it is beneficial to reduce the flow path of the heat exchange medium entering the second sub-flow passage 11447 and the upstream flow passage 11442 from the inlet flow passage 11444 below, and it is beneficial to reduce the heat exchange loss.

[0148] Each second sub-flow passage 11447 extends along the second direction Y, that is, each second sub-flow passage 11447 is arranged in parallel and spaced apart, each second sub-flow passage 11447 is connected with the first sub-flow passage 11446 perpendicularly, and each downstream flow passage 11443 also extends along the second direction Y, so that each second sub-flow passage 11447 is opposite to each downstream flow passage 11443, so that the heat exchange medium can flow more smoothly into each downstream flow passage 11443 from each second sub-flow passage 11447, and it is beneficial to shorten the flow path of the heat exchange medium between entering the downstream flow passage 11443, and reduce heat loss.

[0149] The first sub-flow passage 11446 and the second sub-flow passage 11447 can also be understood as part of the inlet flow passage 11444 below. The heat exchange medium (i.e. heat exchange refrigerant) enters the refrigerant heat exchange component 1140, which aims to reduce the temperature difference problem of the refrigerant heat exchange component 1140 caused by uneven distribution. The 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 distribution. The dryness of the heat exchange medium is the smallest when it enters the refrigerant heat exchange component 1140, so the heat exchange medium is affected the least when it is distributed in this area. This area is generally divided into a plurality of second sub-flow passages 11447, which aims to provide a plurality of upstream flow passages 11442 to reduce the influence of the poor heat exchange capacity of a heat exchange sub-flow passage 11441 on the uniform temperature of the cold plate, and the upstream flow passage 11442 and the downstream flow passage 11443 in any two adjacent heat exchange sub-flow passages 11441 can be balanced with each other, further improving the uniform temperature performance of the refrigerant heat exchange component 1140. The effective length of the plurality of heat exchange sub-flow passages 11441 should be consistent, reducing the influence of uneven distribution caused by the flow resistance difference of each first sub-flow passage 11446 and second sub-flow passage 11447, thereby further reducing the temperature difference on the refrigerant heat exchange component 1140 (or heat exchange surface 1143) and improving the uniform temperature performance of the refrigerant heat exchange component 1140.

[0150] The cross-sectional areas of the first branch flow channel 11446 and the second branch flow channel 11447 are equal to the cross-sectional area of the upstream flow channel 11442, that is, the cross-sectional areas of the upstream flow channel 11442, the downstream flow channel 11443, the first branch flow channel 11446, and the second branch flow channel 11447 are equal, thereby facilitating reduction of flow resistance of the heat exchange refrigerant in the process of entering the second branch flow channel 11447 from the first branch flow channel 11446 and in the process of entering the upstream flow channel 11442 from the second branch flow channel 11447.

[0151] In the embodiment, the first branch flow channel 11446 and the second branch flow channel 11447 are in communication, the first branch flow channel 11446 is arranged to extend along the first direction X to be consistent with the arrangement direction of each heat exchange sub-flow channel 11441, thereby facilitating improvement of flow smoothness of the heat exchange medium; each second branch flow channel 11447 is perpendicular to the first branch flow channel 11446 and is opposite to each downstream flow channel 11443, thereby improving the flow smoothness of the heat exchange medium and facilitating reduction of the flow path of the heat exchange medium and reduction of heat exchange loss.

[0152] In some embodiments, referring to FIGS. 6 and 7, the non-functional area flow channel 1147 further includes at least one inlet flow channel 11444 and at least one outlet flow channel 11445, the inlet flow channel 11444 is in communication with the plurality of upstream flow channels 11442 through the in-circuit branch flow channel 1148, and the outlet flow channel 11445 is in communication with the plurality of downstream flow channels 11443 through the return-circuit branch flow channel 1149; the cross-sectional areas of the upstream flow channel 11442, the downstream flow channel 11443, the in-circuit branch flow channel 1148, the return-circuit branch flow channel 1149, the inlet flow channel 11444, and the outlet flow channel 11445 are equal.

[0153] Specifically, the inlet flow channel 11444 is an inlet for the heat exchange medium to enter the inside of the refrigerant heat exchange component 1140, and the inlet flow channel 11444 can be provided one or more, one inlet flow channel 11444 can be in communication with a plurality of upstream flow channels 11442 through the in-circuit branch flow channel 1148, if the inlet of each upstream flow channel 11442 is referred to as a sub-inlet 114421, it can be known that after the heat exchange medium enters the inlet flow channel 11444, a plurality of branches connected with a plurality of sub-inlets 114421 are formed, the plurality of branches can be understood as a plurality of in-circuit branch flow channels 1148. The cross-sectional area of the inlet flow channel 11444 is equal to the cross-sectional area of the in-circuit branch flow channel 1148 and equal to the cross-sectional area of the upstream flow channel 11442. Thus, it is beneficial to reduce the flow resistance of the heat exchange refrigerant in the process of entering the in-circuit branch flow channel 1148 from the inlet flow channel 11444.

[0154] Similarly, the outlet flow channel 11445 is an outlet through which the heat exchange medium flows out of the refrigerant heat exchange component 1140, and one or more outlet flow channels 11445 can be provided. One outlet flow channel 11445 can be connected to multiple downstream flow channels 11443 through the circuit branch flow channel 1149. If the outlet of each downstream flow channel 11443 is referred to as a sub-outlet 114431, it can be understood that the heat exchange medium flowing out of the sub-outlet 114431 will be connected to the outlet flow channel 11445 through multiple branches, which can be understood as multiple circuit branch flow channels 1149. The cross-sectional area of the outlet flow channel 11445 is equal to the cross-sectional area of the circuit branch flow channel 1149 and the cross-sectional area of the downstream flow channel 11443. Thus, it is beneficial to reduce the flow resistance of the heat exchange medium when entering the circuit branch flow channel 1149 from the circuit branch flow channel 1149.

[0155] In this embodiment, one inlet flow channel 11444 can correspond to multiple upstream flow channels 11442, and one outlet flow channel 11445 can correspond to multiple downstream flow channels 11443. Thus, it is beneficial to increase the number of upstream flow channels 11442 and downstream flow channels 11443, and to reasonably plan and layout them to improve the uniformity of the layout, so as to improve the uniformity of the heat exchange surface 1143 (i.e., the refrigerant heat exchange component 1140).

[0156] In some embodiments, referring to FIGS. 8, 9, and 15, the inlet flow channel 11444 is arranged adjacent to the outlet flow channel 11445.

[0157] Specifically, the inlet flow channel 11444 is adjacent to the outlet flow channel 11445, so that the temperature of the inlet flow channel 11444 and the outlet flow channel 11445 can be more balanced. That is, the two adjacent inlet flow channels 11444 and outlet flow channels 11445 correspond to form a second uniform temperature area F on the heat exchange surface 1143, and the temperature distribution of the second uniform temperature area F is more balanced. For example, when the flow resistance of the heat exchange medium is large, the high-temperature heat exchange medium in the inlet flow channel 11444 can heat the low-temperature heat exchange medium in the outlet flow channel 11445, so as to request a larger flow of heat exchange medium from the external conveying system to further reduce the temperature difference on the refrigerant heat exchange component 1140 (specifically, the heat exchange surface 1143).

[0158] In this embodiment, the adjacent arrangement of the inlet flow channel 11444 and the outlet flow channel 11445 is beneficial to balance the temperature and improve the flow of the heat exchange medium, thereby balancing the temperature difference of the heat exchange surface 1143.

[0159] In some embodiments, referring to FIG. 7 and FIG. 8, the inlet flow channel 11444 and the outlet flow channel 11445 are located at the same side along the first direction X; the functional area flow channel 1146 further comprises a loop guide flow channel 11448, each downstream flow channel 11443 has a sub-outlet 114431 at the side away from the inlet flow channel 11444, and the outlet flow channel 11445 is configured in communication with each sub-outlet 114431 through the loop shunt flow channel 1149 and the loop guide flow channel 11448; the loop guide flow channel 11448 is located at one end or both ends of the functional area flow channel 1146 along the first direction X.

[0160] Specifically, the inlet flow channel 11444 and the outlet flow channel 11445 are located at the same side along the first direction X, for example, having an extension axis along the first direction X, the inlet flow channel 11444 and the outlet flow channel 11445 are located at one side of the extension axis, and the inlet flow channel 11444 and the outlet flow channel 11445 can be arranged adjacently.

[0161] The loop guide flow channel 11448 is a connecting flow channel or passage between the sub-outlet 114431 of each downstream flow channel 11443 and the outlet flow channel 11445, and the loop guide flow channel 11448 can be provided with one or two, and each loop guide flow channel 11448 can comprise a plurality of guide sub-flow channels 11449 arranged in parallel. For example, the loop guide flow channel 11448 is provided with two, and the two loop guide flow channels 11448 can be located at both ends of the functional area flow channel 1146 along the first direction X, that is, the loop guide flow channel 11448 is arranged at the head end position and the tail end position of the functional area flow channel 1146.

[0162] Each downstream flow channel 11443 has a sub-outlet 114431, and the sub-outlet 114431 is located at the side of the downstream flow channel 11443 away from the inlet flow channel 11444, that is, along the second direction Y, the heat exchange medium flows in from one end and flows out from the other end and then enters the loop guide flow channel 11448, so that the fluid flows into the outlet flow channel 11445 through the loop shunt flow channel 1149 from the edge of the heat exchange surface 1143 along the first direction X.

[0163] It can be seen that the heat exchange capacity of the heat exchange medium in the two loop guide flow channels 11448 is relatively low in this layout, so it can be seen that the temperature of the area of the heat exchange surface 1143 corresponding to the loop guide flow channel 11448 is higher than that of the other upstream flow channels 11442 and downstream flow channels 11443, and therefore the area of the heat exchange surface 1143 corresponding to the loop guide flow channel 11448 can be relatively reduced to facilitate reducing the area of the overheating area. In combination with the temperature distribution of the refrigerant heat exchange flow channel 1144 shown in FIG. 16, it can be clearly found that the temperature of the downstream flow channel 11443 adjacent to the upstream flow channel 11442 is obviously balanced, and the temperature of the overheating area (i.e., the edge area A) corresponding to the loop guide flow channel 11448 is also relatively balanced, and the overheating phenomenon is not easy to occur.

[0164] In the present embodiment, by providing the loop guide flow channel 11448 and arranging the loop guide flow channel 11448 at one end or both ends of the heat exchange surface 1143 along the first direction X, that is, arranging the loop guide flow channel 11448 at the edge position of the heat exchange surface 1143, the loop guide flow channel 11448 corresponds to the battery monomer assembly 1110 at the edge position with relatively low temperature, thereby facilitating reducing the influence of the overheating area on the battery monomer assembly 1110 and facilitating balanced heat exchange of the battery monomer assembly 1110.

[0165] In some embodiments, referring to FIGS. 5, 7-9, the loop guide flow channel 11448 includes a plurality of guide sub-flow channels 11449 extending along the second direction Y and communicating, and the plurality of guide sub-flow channels 11449 communicate between the loop branch flow channel 1149 and each sub-outlet 114431.

[0166] Specifically, since the loop guide flow channel 11448 is used to converge the heat exchange medium in the plurality of downstream flow channels 11443, the loop guide flow channel 11448 includes a plurality of guide sub-flow channels 11449, and the plurality of guide sub-flow channels 11449 communicate between the loop branch flow channel 1149 and each sub-outlet 114431, so as to improve the efficiency of flow circulation and reduce the accumulation and blockage of the heat exchange medium.

[0167] Since the upstream flow channel 11442 and the downstream flow channel 11443 are both arranged to extend along the second direction Y, in order to improve the space utilization of the refrigerant heat exchange component 1140, the guide sub-flow channel 11449 is also arranged to extend along the second direction Y, so that the flow channel distribution on the heat exchange surface 1143 of the refrigerant heat exchange component 1140 is more uniform, and it is beneficial to improve the balanced heat dissipation.

[0168] In this embodiment, by arranging multiple guide sub-flow channels 11449 extending along the second direction Y, the return flow of the refrigerant heat exchange flow channel 1144 is smoother, and the space utilization in the refrigerant heat exchange component 1140 is improved, and the layout of the refrigerant heat exchange flow channel 1144 is more reasonable.

[0169] In some embodiments, as shown in FIG. 7, along the first direction X, the two adjacent guide sub-flow channels 11449 have a first interval distance L1; the upstream flow channel 11442 in each heat exchange sub-flow channel 11441 is provided with multiple and arranged in the first direction X, and the second interval distance L2 between the two adjacent upstream flow channels 11442; the downstream flow channel 11443 in each heat exchange sub-flow channel 11441 is provided with multiple and arranged in the first direction X, and the third interval distance L3 between the two adjacent downstream flow channels 11443; the first interval distance L1 is less than the second interval distance L2 and the third interval distance L3.

[0170] Specifically, the first interval distance L1 should be understood as the distance between the two opposite flow channel walls of the two adjacent guide sub-flow channels 11449 in the first direction X, that is, the distance generated by the interval part between the 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 the two adjacent upstream flow channels 11442, that is, the distance generated by the interval part between the 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 the two adjacent downstream flow channels 11443, that is, the distance generated by the interval part between the two adjacent downstream flow channels 11443 in the first direction X.

[0171] The first interval distance L1 is less than the second interval distance L2 and the third interval distance L3, which means that in the first direction X, the density of the guide sub-flow channel 11449 should be greater than the density of the downstream flow channel 11443 and greater than the density of the upstream flow channel 11442, so that the area of the corresponding heat exchange surface 1143 of the multiple guide sub-flow channels 11449 is as small as possible, to reduce the area of the overheating area (i.e. overheating area) on the heat exchange surface 1143.

[0172] In this embodiment, by making the interval distance between the multiple guide sub-flow channels 11449 less than the interval distance of the downstream flow channel 11443 and the interval distance of the upstream flow channel 11442, it is beneficial to reduce the area of the region on the heat exchange surface 1143 corresponding to the circuit guide flow channel 11448, and to reduce the area of the overheating area.

[0173] In some embodiments, referring to FIGS. 6, 8-10 and 16, an edge region A is formed on the surface of the refrigerant heat exchange component 1140 near the edge, and the circuit guide flow channel 11448 is arranged corresponding to the edge region A.

[0174] Specifically, taking the refrigerant heat exchange component 1140 as an example, the refrigerant heat exchange component 1140 has two opposite surfaces, one of which forms a heat exchange surface 1143, and the edge region A is understood as a region near the edge of the heat exchange surface 1143. In theory, there can be multiple edge regions A, but based on the structural layout of the refrigerant heat exchange flow channel 1144, referring to FIGS. 8 and 9, only one or two edge regions A near the edge of the heat exchange surface 1143 of the refrigerant heat exchange component 1140 are studied along the two ends in the first direction X. It can be considered that the refrigerant heat exchange component 1140 has one edge region A or two edge regions A on the surface forming the heat exchange surface 1143.

[0175] The circuit guide flow channel 11448 is located inside the refrigerant heat exchange component 1140 and is arranged opposite to the surface of the refrigerant heat exchange component 1140 forming the heat exchange surface 1143. The circuit guide flow channel 11448 is arranged corresponding to the position of the edge region A. When the circuit guide flow channel 11448 is provided with one, the edge region A is provided with one and arranged corresponding to the circuit guide flow channel 11448. When the circuit guide flow channel 11448 is provided with two, the edge region A is provided with two corresponding, and the two circuit guide flow channels 11448 are arranged corresponding to the two edge regions A respectively.

[0176] The circuit guide flow channel 11448 corresponds to the region on the surface of the refrigerant heat exchange component 1140 with high temperature. It can be found that in the battery monomer assembly 1110, the temperature of the battery monomer assembly 1110 near the edge of the refrigerant heat exchange component 1140 and near the side wall part of the box assembly 1120 is lower than that of the battery monomer assembly 1110 in the middle region. Therefore, arranging the circuit guide flow channel 11448 in the edge region A can be beneficial to balance the heat exchange between the refrigerant heat exchange component 1140 and the battery monomer assembly 1110. In combination with FIG. 16, the temperature of the edge region A corresponding to the circuit guide flow channel 11448 is also relatively balanced, and the phenomenon of overheating is less likely to occur.

[0177] In the present embodiment, the edge region A of the refrigerant heat exchange component 1140 corresponds to the circuit guide flow channel 11448, which can correspond to the battery monomer assembly 1110 in the edge region A with lower temperature, thereby being beneficial to improve the balanced heat dissipation of the battery monomer assembly 1110.

[0178] In some embodiments, referring to FIG. 6, the edge region A avoids the battery monomer assembly 1110.

[0179] Specifically, taking the example of placing the battery device 1100 horizontally, the position below the edge region A is the loop guide flow channel 11448. Due to the heat exchange capability of the heat exchange medium in the loop guide flow channel 11448, the temperature of the edge region A is prone to rise, and if the edge region A abuts against the battery cell assembly 1110, it will inevitably affect the heat exchange of the battery cell assembly 1110 in this part, and the risk of sharp rise of the temperature of the battery cell assembly 1110 is prone to occur. Therefore, in the embodiment, the battery cell assembly 1110 is kept away from the edge region A, that is, the battery cell assembly 1110 is not placed above the edge region A, so that the battery cell 1112 component is as far as possible not in direct contact with the edge region A, thereby facilitating reducing the influence of overheating on the heat exchange of the battery cell assembly 1110.

[0180] In the embodiment, the battery cell assembly 1110 is kept away from the edge region A prone to overheating, thereby reducing the influence of overheating on the battery cell assembly 1110, and playing a protective role on the battery cell assembly 1110.

[0181] In some embodiments, referring to FIGS. 9, 12 and 13, the refrigerant heat exchange component 1140 has a heat exchange surface 1143, the heat exchange surface 1143 has a first region D and a second region C, in the first direction X, the second region C is distributed in the middle of the heat exchange surface 1143, and the first region D is distributed on both sides of the second region C; a plurality of heat exchange sub-flow channels 11441 correspond to the second region C, and a plurality of heat exchange sub-flow channels 11441 correspond to the first region D; the flow path between the inlet flow channel 11444 and the upstream flow channel 11442 corresponding to the plurality of heat exchange sub-flow channels 11441 corresponding to the second region C is smaller than the flow path between the inlet flow channel 11444 and the upstream flow channel 11442 corresponding to the plurality of heat exchange sub-flow channels 11441 corresponding to the first region D.

[0182] Specifically, the first region D and the second region C are regions on the heat exchange surface 1143 corresponding to the heat exchange sub-flow channels 11441, taking the first direction X as the width direction of the heat exchange surface 1143, the heat exchange surface 1143 has the second region C in the middle and the first region D away from the middle in the width direction, and the middle can be understood as the part of the heat exchange surface 1143 closer to the center in the width direction.

[0183] The heat exchange sub-flow channels 11441 corresponding to the first region D are arranged away from the middle part of the heat exchange surface 1143. Since the temperature of the battery cell assembly 1110 corresponding to the middle part of the heat exchange surface 1143 (i.e., the second region C) is more likely to rise sharply, the heat exchange sub-flow channels 11441 arranged in the middle part need to be able to replenish the heat exchange medium more timely. Therefore, the flow path between the upstream flow channels 11442 corresponding to the second region C and the inlet flow channel 11444 is shortened, so that the heat exchange medium can flow into the upstream flow channels 11442 of the second region C more quickly, achieving the purpose of quickly cooling the battery cell assembly 1110 in the region, and helping to reduce the risk of sharp temperature rise of the battery cell assembly 1110 in the middle part.

[0184] Therefore, it can be understood that the second region C can be understood as a preferential cooling area, which is distributed in the middle part of the heat exchange surface 1143 to correspond to the battery cell 1112 located in the middle part. Based on the reason that the battery cell 1112 located in the middle part generates more heat, the battery cell 1112 in the middle part with high heat exchange demand can be fully cooled. When the heat exchange is unstable or the amount of heat exchange medium is small, the overheating area on the heat exchange surface 1143 may increase, intensifying the temperature difference of the cold plate. Therefore, the region with high heat exchange demand needs to be cooled preferentially, that is, the second region C is preferentially cooled. Therefore, the flow path between the upstream flow channels 11442 corresponding to the second region C and the inlet flow channel 11444 is made smaller, so that the heat exchange medium can flow in more quickly, improving the efficiency of heat exchange, and helping to balance the heat exchange.

[0185] In addition, it should be further pointed out that the density of the upstream flow channels 11442 corresponding to the second region C should also be greater than that of the upstream flow channels 11442 corresponding to the first region D, and the density of the downstream flow channels 11443 corresponding to the second region C should also be greater than that of the downstream flow channels 11443 corresponding to the first region D, thereby helping to improve the efficiency of heat exchange.

[0186] In the present embodiment, by reducing the flow path of the heat exchange medium into the upstream flow channels 11442 corresponding to the second region C, the heat exchange medium can reach the upstream flow channels 11442 of the region more timely, thereby achieving the purpose of quickly cooling the battery cell assembly 1110 in the middle part, helping to reduce the risk of sharp temperature rise of the battery cell assembly 1110 in the middle part, and helping to achieve balanced heat exchange of the battery cell assembly 1110.

[0187] In some embodiments, referring to FIGS. 7-9, the refrigerant heat exchange flow channels 1144 of the functional area are symmetrically arranged.

[0188] Specifically, the functional area of the refrigerant heat exchange component 1140 is provided with a symmetry plane 1145, and the refrigerant heat exchange flow channels 1144 of the functional area are symmetrically arranged on both sides of the symmetry plane 1145, that is, the functional area flow channels 1146 are symmetrically arranged about the symmetry plane 1145.

[0189] Here, the symmetry plane 1145 should be understood as a virtual surface, and the symmetry plane 1145 should be understood as an imaginary plane perpendicular to the heat exchange surface 1143, and the projection of the symmetry plane 1145 on the heat exchange surface 1143 forms a symmetry axis, and the symmetry axis should be understood as a symmetry line of the heat exchange surface 1143, and the battery cell assemblies 1110 on both sides of the symmetry axis should be symmetrically arranged.

[0190] The functional area flow channels 1146 are divided into two parts, so that the two parts are symmetrically arranged about the symmetry plane 1145. Since the temperature distribution of the battery cell assemblies 1110 on both sides of the symmetry plane 1145 is relatively symmetrical, by symmetrically designing the functional area flow channels 1146 on both sides of the symmetry plane 1145, the purpose 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 assemblies 1110 and controlling the temperature distribution difference of the symmetry area of the battery cell assemblies 1110 within the design range.

[0191] In this embodiment, by designing the symmetrically arranged functional area flow channels 1146, the balanced heat dissipation of the refrigerant heat exchange component 1140 to the battery cell assemblies 1110 is facilitated.

[0192] In some embodiments, referring to FIGS. 5 and 6, the battery cell assembly 1110 includes a plurality of battery cell modules 1111 arranged along a first direction X, and each battery cell module 1111 includes a plurality of battery cells 1112 arranged along a second direction Y.

[0193] Specifically, each battery cell module 1111 includes a plurality of battery cells 1112 arranged along the second direction Y, so that each battery cell module 1111 has a certain extension length along the second direction Y, and the length direction of the battery cell module 1111 is consistent with the extension length direction of the upstream flow channels 11442 and the downstream flow channels 11443. The plurality of upstream flow channels 11442 and the plurality of downstream flow channels 11443 can also be arranged at intervals in the width direction of the battery cell module 1111, so that the upstream flow channels 11442 and the downstream flow channels 11443 are more uniformly distributed between the battery cell modules 1111, which is beneficial to improve the heat exchange uniformity of the refrigerant heat exchange flow channels 1144 to the battery cell assemblies 1110.

[0194] In this embodiment, the arrangement of the battery cell assembly 1110 matches the arrangement of the refrigerant heat exchange flow channel 1144, thereby facilitating the uniformity of the heat exchange between the refrigerant heat exchange flow channel 1144 and the battery cell assembly 1110.

[0195] In some embodiments, referring to FIG. 2, the refrigerant heat exchange component 1140 further comprises a box assembly 1120 having a receiving cavity 1133, and the refrigerant heat exchange component 1140 is located in the receiving cavity 1133 and arranged on the box bottom 11222 of the box assembly 1120 for supporting the battery cell assembly 1110.

[0196] For the box assembly 1120, the box assembly 1120 is used to accommodate the battery cell assembly 1110, and the box assembly 1120 can include a first part 1121 and a second part 1122, the first part 1121 and the second part 1122 are overlapped with each other, and the first part 1121 and the second part 1122 together define a receiving cavity 1133 for accommodating the battery cell assembly 1110. The first part 1121 can be a plate structure, and the second part 1122 can be a hollow structure with one end open. The first part 1121 is overlapped with the open side of the second part 1122 to define the receiving cavity 1133 together with the second part 1122. Alternatively, the first part 1121 can also be a hollow structure with one side open. In this case, the second part 1122 can also be a hollow structure with one end open. The open side of the first part 1121 is overlapped with the open side of the second part 1122 to define the receiving cavity 1133 together with the second part 1122. The box assembly 1120 can have various shapes, such as a cylinder, a cuboid, etc. The second part 1122 can include a frame 11221 and a box bottom 11222. The box bottom 11222 can be a plate structure, so the box bottom 11222 is also called a box bottom plate. The frame 11221 is arranged around to form the side wall of the box assembly 1120. The frame 11221 forms two openings, the bottom opening of the frame 11221 is connected with the box bottom 11222, and the second part 1122 is connected with the upper opening of the frame 11221.

[0197] Generally, the battery device 1100 is placed horizontally, and the box bottom plate is horizontal. The refrigerant heat exchange component 1140 can be placed on the box bottom plate. In this case, the refrigerant heat exchange component 1140 can be in a plate shape. The upper surface of the refrigerant heat exchange component 1140 forms a heat exchange surface 1143. The bottom surface of each battery cell 1112 in the battery cell assembly 1110 abuts against the heat exchange surface 1143. The refrigerant heat exchange component 1140 can also support and hold the battery cell assembly 1110.

[0198] In the embodiment, the refrigerant heat exchange component 1140 is placed on the bottom part 11222 of the box assembly 1120, so that the bottom part of the battery monomer assembly 1110 is heat exchanged, the heat exchange area is large, and the heat exchange efficiency is improved.

[0199] In some embodiments, referring to FIG. 3, the refrigerant heat exchange component 1140 includes a box body 1130, the refrigerant heat exchange component 1140 is connected to the box body 1130 and cooperates with the box body 1130 to form a containing cavity 1133, the battery monomer assembly 1110 is contained in the containing cavity 1133, and the refrigerant heat exchange component 1140 can be used to support the battery monomer assembly 1110.

[0200] Specifically, the box body 1130 can include a cover body 1131 and a box frame 1132, the cover body 1131 and the box frame 1132 are overlapped with each other, and the cover body 1131, the box frame 1132 and the refrigerant heat exchange component 1140 cooperatively define the containing cavity 1133 for containing the battery monomer assembly 1110. The cover body 1131 can be a plate structure, and the box frame 1132 can be a hollow structure with two open ends, for example, the box frame 1132 is a ring frame structure, the cover body 1131 is overlapped with one open end of the box frame 1132, the refrigerant heat exchange component 1140 is connected to the other open end of the box frame 1132, and the cover body 1131 can be arranged opposite to the refrigerant heat exchange component 1140. The box body 1130 can have various shapes, such as a cylinder, a cuboid, etc.

[0201] The refrigerant heat exchange component 1140 can be connected to the box body 1130, and the refrigerant heat exchange component 1140 can form a bottom plate of the box, so that the battery monomer assembly 1110 can be heat exchanged while being supported, which is beneficial to simplify the structure of the external box body 1130 and reduce the weight of the battery device 1100.

[0202] In the structure of the box body 1130 described above, taking the vertical placement of the box body 1130 as an example, the edge area A can be located below the box frame 1132, so that the edge area A can avoid the battery monomer assembly 1110.

[0203] In the embodiment, the refrigerant heat exchange component 1140 can be connected to the box body 1130, and the refrigerant heat exchange component 1140 can form a bottom plate of the box, so that the battery monomer assembly 1110 can be heat exchanged while being supported, which is beneficial to simplify the structure of the external box body 1130 and reduce the weight of the battery device 1100.

[0204] In some embodiments, referring to FIGS. 2-9, the battery device 1100 further comprises a joint component 1150 connected to the refrigerant heat exchange component 1140 and in communication with the refrigerant heat exchange flow channels 1144.

[0205] Specifically, the joint component 1150 is provided with a flow channel inlet and a flow channel outlet. The flow channel inlet is in communication with each of the inlet flow channels 11444 and further in communication with the sub-inlet 114421 of each of the upstream flow channels 11442 through the inlet shunt flow channel 1148. The flow channel outlet is in communication with each of the outlet flow channels 11445 and further in communication with the sub-outlet 114431 of each of the downstream flow channels 11443 through the outlet shunt flow channel 1149. The joint component 1150 can be connected to the refrigerant heat exchange component 1140 by welding, or the joint component 1150 can be connected to the refrigerant heat exchange component 1140 by fasteners or other components. The joint component 1150 can be located at an upper position of the heat exchange surface 1143 and close to the edge of the heat exchange surface 1143.

[0206] In the present embodiment, the joint component 1150 is provided to facilitate connection with external pipelines for conveying heat exchange medium (i.e., heat exchange refrigerant), thereby improving the convenience of assembly.

[0207] According to some embodiments of the present application, the present application further provides a refrigerant heat exchange device, which comprises the refrigerant heat exchange component 1140 in the battery device 1100 of any one of the above embodiments.

[0208] The refrigerant heat exchange device in the present 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 the present example, and the technical effects are the same. Therefore, no further description is provided here, and the specific description can be found in the description of the battery device 1100 above.

[0209] According to some embodiments of the present application, the present application further provides an energy storage device, which comprises a power conversion device and the energy storage device in the above embodiments. The power conversion device is used to electrically connect the power generation device and the energy storage device.

[0210] Specifically, the energy storage device can comprise one or more battery clusters to improve the voltage and capacity of the energy storage device. The battery cluster can comprise a plurality of battery devices 1100 connected in series by a busbar component to improve the voltage of the energy storage device. When the energy storage device comprises a plurality of battery clusters, the plurality of battery clusters are connected in parallel to improve the capacity of the energy storage device.

[0211] The energy storage device can be used in an energy storage power station, a wind power system, a solar power system, a mobile power system, or a temporary power supply system, etc. The energy storage device can store electrical energy as needed and output electrical energy at an appropriate time. For example, the energy storage device can store electrical energy during a low electricity consumption period, and provide electrical energy for relevant users or electrical equipment during a high electricity consumption period. The energy storage system provided in the embodiments of the present application can be any power system that needs to use an energy storage device.

[0212] In some embodiments, the energy storage device is an energy storage container or an energy storage cabinet.

[0213] In some embodiments, the energy storage device can include a cabinet body and one or more battery clusters, and the battery clusters are accommodated in the cabinet body.

[0214] In some embodiments, the energy storage device can include a thermal management module, a master control module, a general control module, a power distribution module, and a fire-fighting module, etc.

[0215] As an example, the thermal management module can include a liquid cooling unit that provides cooling liquid for adjusting the temperature of the battery monomer to each battery device 1100 through a pipeline.

[0216] As an example, the master control module can serve as a battery management unit of the battery cluster, for monitoring and managing the battery cluster. The master control module can monitor information such as current, voltage, power, or temperature of the battery cluster. For example, the charging and discharging current and voltage of the battery cluster can be controlled. The master control module includes a slave battery management unit SBMU (Slave Battery Management Unit, SBMU), a fusion switch, and other modules.

[0217] As an example, the general control module can serve as a battery management unit of the energy storage device, for monitoring and managing the energy storage device. The general control module can monitor information such as current, voltage, power, state of charge, or temperature of the energy storage device. For example, the charging and discharging current and voltage of the energy storage device can be controlled. As an example, the general control module includes an insulation monitoring module IMM (Insulation Monitoring Module, IMM), a master battery management unit MBMU (Master Battery Management Unit, MBMU), an Ethernet ETH (EtherNet, ETH), and an optical fiber conversion module, and other modules.

[0218] As an example, the fire-fighting module includes a control panel, a detector, an alarm device, etc., for detecting, alarming, or extinguishing the energy storage system.

[0219] As an example, the power distribution module can be used to distribute power to modules that need power in the energy storage device.

[0220] According to some embodiments of the present application, the present application further provides an energy storage system, the energy storage system comprising a power conversion device and the energy storage device in the above embodiments, the power conversion device being used to electrically connect the power generation device and the energy storage device.

[0221] In some embodiments, the energy storage system can comprise one or more energy storage devices and a power conversion device (PCS) used to connect between the power generation device and the energy storage device. The power generation device is used to generate electric energy, and the electric energy generated by the power generation device can be stored into the energy storage device through the power conversion device. As an example, the power generation device can be a solar panel, a water power generation device, a fire power generation device, a wind power generation device, etc. The specific type of the power generation device is not limited in the present application.

[0222] According to some embodiments of the present application, referring to FIG. 1, the present application further provides a power consumption device, the power consumption device comprising 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 being used to store or provide electric energy.

[0223] The technical solutions described in the embodiments of the present application are applicable to various power consumption devices using battery monomers, such as mobile phones, portable devices, notebook computers, electric vehicles, electric toys, electric tools, vehicles 1000, ships, and spacecraft, such as aircraft, rockets, space shuttles, and spacecraft.

[0224] The example of the power consumption device in the present application is based on the example of the battery device 1100 described above, and the example of the power consumption device contains all the technical effects of the example of the battery device 1100, which will not be described again.

[0225] According to some embodiments of the present application, the present application further provides a charging network, the charging network comprising a charging pile and the energy storage device in the above embodiments or the energy storage system in the above embodiments, the energy storage device being used to provide electric energy for the charging pile.

[0226] For example, the charging network comprises a charging pile and an energy storage device, the charging pile is electrically connected with the energy storage device, and the energy storage device is used to provide electric energy for the charging pile. The charging pile and the battery device 1100 in the energy storage device are electrically connected through a cable, and the battery device 1100 can provide the electric energy stored by itself to the charging pile. The charging pile has one or more connectors used to connect with a power consumption device (such as a vehicle 1000), so as to charge the power consumption device.

[0227] The energy storage device can be located inside the charging pile (such as a charging and storage integrated machine) or outside the charging pile.

[0228] The above merely describes preferred embodiments of the present application, and only specifically describes the technical principles of the present application, and these descriptions are only for explaining the principles of the present application, and cannot be explained as limitations on the protection scope of the present application in any way. Based on the explanations here, any modifications, equivalent replacements and improvements made within the spirit and principles of the present application, and other specific embodiments of the present application that can be thought of by those skilled in the art without creative labor, should be included in the protection scope of the present application.

Claims

1. A battery device (1100) characterized by, Comprise: a battery cell assembly (1110); a refrigerant heat exchange component (1140) configured to exchange heat with the battery cell assembly (1110), the refrigerant heat exchange component (1140) comprising a functional area (1160) and a non-functional area (1170), the refrigerant heat exchange component (1140) having a refrigerant heat exchange flow channel (1144) inside, a cross-sectional area of the functional area (1160) being at least coincident with a projection of the battery cell assembly (1110); a cross-sectional area of the refrigerant heat exchange flow channel (1144) in the functional area (1160) being equal to a cross-sectional area of the refrigerant heat exchange flow channel (1144) in the non-functional area (1170).

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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