Battery device, refrigerant heat exchange component and electric device

Abstract

The utility model belongs to the technical field of battery production, and provides a battery device, a refrigerant heat exchange component and a power utilization device.The battery device comprises a box assembly, a battery monomer assembly and the refrigerant heat exchange component, and a containing cavity is formed in the box assembly; the battery monomer assembly is arranged in the accommodating cavity; the refrigerant heat exchange part is configured to exchange heat with the battery monomer assembly; a refrigerant heat exchange flow channel is formed in the refrigerant heat exchange component and comprises a plurality of heat exchange sub-flow channels arranged in parallel, each heat exchange sub-flow channel comprises an upstream flow channel and a downstream flow channel which communicate with each other, and the upstream flow channels in part of the heat exchange sub-flow channels are adjacent to the downstream flow channels in the adjacent heat exchange sub-flow channels and are in heat conduction fit with the downstream flow channels in the adjacent heat exchange sub-flow channels. The downstream flow channels in part of the heat exchange sub-flow channels are adjacent to and in heat conduction fit with the upstream flow channels in the adjacent heat exchange sub-flow channels. The utility model aims to improve the balanced heat dissipation capability of the refrigerant heat exchange component.

Description

[0001] The present application claims priority to the Chinese Patent Application No. 202420907842.4, filed on April 28, 2024, and entitled "Heat Exchange Device, Battery and Electric Device", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

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

[0003] In the process of charging and discharging of the battery device in a new energy vehicle, a large amount of heat is released. A refrigerant heat exchange component capable of heat exchanging the battery monomer assembly is usually arranged in the battery device to realize cooling of the battery monomer assembly through heat exchange.

[0004] In the related art, the refrigerant heat exchange component has the problem of uneven heat exchange of the battery monomer assembly, which causes the temperature of part of the battery monomer assembly to be too high, resulting in a large amount of heat accumulated in the battery device, thereby affecting the use performance and service life of the battery device. Utility Model Content

[0005] The present application aims to provide a battery device, a refrigerant heat exchange component and an electric device, and aims to solve the technical problem of poor uniformity of the refrigerant heat exchange component in the battery device.

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

[0007] a box assembly, internally provided with a containing cavity;

[0008] a battery monomer assembly, arranged in the containing cavity;

[0009] a refrigerant heat exchange component, configured to exchange heat with the battery monomer assembly; the refrigerant heat exchange component internally has a refrigerant heat exchange flow channel, the refrigerant heat exchange flow channel comprises a plurality of heat exchange sub-flow channels arranged in parallel, each heat exchange sub-flow channel comprises an upstream flow channel and a downstream flow channel connected in communication, the upstream flow channel in part of the heat exchange sub-flow channels is adjacent to and in thermal conduction 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.

[0010] In the embodiment, the upstream flow channel and the downstream flow channel in the two adjacent heat exchange sub-flow channels are arranged adjacently, so that 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 overheating region is not easy to form, the area of the overheating 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.

[0011] In one of the embodiments, the plurality of heat exchange sub-flow channels are arranged in sequence along a first direction, and the upstream flow channel and the downstream flow channel in the heat exchange sub-flow channel are arranged in extension along a second direction.

[0012] In the embodiment, the upstream flow channel and the downstream flow channel are arranged adjacently in 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.

[0013] In one of the embodiments, the refrigerant heat exchange flow channel further comprises 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, and the outlet flow channel is in communication with the plurality of downstream flow channels.

[0014] 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 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 improve the uniformity of the heat exchange surface.

[0015] In one of the embodiments, the refrigerant heat exchange flow channel further comprises a first branch flow channel and a plurality of second branch flow channels in communication with the first branch flow channel, the first branch flow channel is arranged in extension along a first direction, and the first branch flow channel is in communication with the inlet flow channel; each second branch flow channel is arranged in extension along a second direction, and each second branch flow channel is respectively arranged in communication with each upstream flow channel; the second direction is perpendicular to the first direction.

[0016] In the embodiment, the first branch flow channel is arranged in extension 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 branch flow channel is perpendicular to the first branch flow channel, and each second branch flow 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.

[0017] In one of the embodiments, the inlet flow channel and the outlet flow channel are arranged adjacently.

[0018] In the embodiment, the adjacent inlet flow channel and outlet flow channel are beneficial to realize temperature balance, improve the flow of the heat exchange refrigerant, and balance the temperature difference of the heat exchange surface.

[0019] In one of the embodiments, along the first direction, the two end positions of the refrigerant heat exchange flow channel are configured as downstream flow channels.

[0020] In the embodiment, the two ends in the first direction are matched with the downstream flow channels, temperature coordination matching is realized, and it is more beneficial to realize balanced heat dissipation of the battery monomer assembly.

[0021] 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 refrigerant heat exchange 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 to each sub-outlet through the loop guide flow channel; along the first direction, the loop guide flow channel is located at one end or both ends of the refrigerant heat exchange flow channel.

[0022] In the embodiment, the loop guide flow channel corresponds to the battery monomer assembly with relatively low temperature at the edge position, thereby being beneficial to reduce the influence of the overheated area on the battery monomer assembly and realize balanced heat exchange of the battery monomer assembly.

[0023] 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 outlet flow channel and each sub-outlet.

[0024] 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, the space utilization in the refrigerant heat exchange component is improved, and the layout of the refrigerant heat exchange flow channel is more reasonable.

[0025] 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.

[0026] 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 channel and the interval distance of the upstream flow channel, it is beneficial to reduce the area of the region on the heat exchange surface corresponding to the loop guide flow channel and reduce the area of the overheated area.

[0027] In one of the embodiments, the edge region is formed on the surface of the refrigerant heat exchange component near the edge, and the circuit guide flow channel is arranged corresponding to the edge region.

[0028] 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 cooled, so that the equalization cooling of the battery cell assembly is facilitated.

[0029] In one of the embodiments, the edge region is arranged to avoid the battery cell assembly.

[0030] In the embodiment, the battery cell assembly is arranged to avoid the edge region which is prone to overheating, so that the influence of overheating on the battery cell assembly is reduced, and the battery cell assembly is protected.

[0031] In one of the embodiments, the refrigerant heat exchange component has a heat exchange surface, the heat exchange surface has a first region and a second region, in a first direction, the second region is located in the middle of the heat exchange surface, and the first region is distributed on both sides of the second region; a plurality of heat exchange sub-flow channels correspond to the second region, and a plurality of heat exchange sub-flow channels correspond to the first region; the flow path from the inlet flow channel to the upstream flow channel of the plurality of heat exchange sub-flow channels corresponding to the second region is smaller than the flow path from the inlet flow channel to the upstream flow channel of the plurality of heat exchange sub-flow channels corresponding to the first region.

[0032] In the embodiment, by reducing the flow path of the heat exchange medium into the upstream flow channel corresponding to the second region, the heat exchange medium can reach the upstream flow channel of the region more timely, so that the purpose of rapidly cooling the battery cell assembly in the middle region is achieved, the risk of rapid temperature rise of the battery cell assembly in the middle region is reduced, and the equalization heat exchange of the battery cell assembly is facilitated.

[0033] In one of the embodiments, the refrigerant heat exchange component has a flow channel group inside, the flow channel group includes two refrigerant heat exchange flow channels, the refrigerant heat exchange component has a symmetry plane, and the two refrigerant heat exchange flow channels are symmetrically arranged on both sides of the symmetry plane.

[0034] In the embodiment, by designing the two refrigerant heat exchange flow channels arranged symmetrically, the equalization cooling of the battery cell assembly by the refrigerant heat exchange component is facilitated.

[0035] In one of the embodiments, the battery cell assembly includes a plurality of battery cell modules arranged in a first direction, and each battery cell module includes a plurality of battery cells arranged in a second direction.

[0036] In the embodiment, the arrangement mode of the battery cell assembly matches the arrangement mode of the refrigerant heat exchange flow channel, so that the equalization of the heat exchange of the battery cell assembly by the refrigerant heat exchange flow channel is facilitated.

[0037] In one of the embodiments, the refrigerant heat exchange component is located in the accommodating cavity and arranged on the bottom of the box assembly for supporting the battery monomer assembly.

[0038] In the embodiment, the refrigerant heat exchange component is arranged on the bottom of the box assembly, so that the bottom of the battery monomer assembly is heat exchanged, the heat exchange area is large, and the heat exchange efficiency is improved.

[0039] In one of the embodiments, the box assembly comprises a box body, the refrigerant heat exchange component is connected to the box body and cooperatively formed with the box body to define the accommodating cavity, the battery monomer assembly is accommodated in the accommodating cavity, and the refrigerant heat exchange component can be used for supporting the battery monomer assembly.

[0040] In the embodiment, the refrigerant heat exchange component can be connected to the box body, and the refrigerant heat exchange component can form a bottom plate, so that the refrigerant heat exchange component can be used for supporting the battery monomer assembly while heat exchanging with the battery monomer assembly, and the structure of the external box body is simplified to reduce the weight of the battery device.

[0041] In one of the embodiments, the battery device further comprises a joint component connected to the refrigerant heat exchange component and respectively communicated with each inlet flow channel and each outlet flow channel.

[0042] In the embodiment, the joint component is arranged, so that the joint component is connected to the external pipeline for conveying fluid, and the assembly convenience is improved.

[0043] In one of the embodiments, the width of the refrigerant heat exchange flow channel ranges from 6 to 15 mm.

[0044] In the embodiment, the width of the refrigerant heat exchange flow channel is set to range from 6 to 15 mm, and the width range can ensure that the refrigerant circulates at a reasonable pressure drop and flow rate, and ensure stable operation of the thermal management system of the entire battery device.

[0045] In one of the embodiments, the width of the refrigerant heat exchange flow channel ranges from 6 to 10 mm.

[0046] In the embodiment, the width ranging from 6 to 10 mm can improve the heat exchange performance of the refrigerant heat exchange component, and also considers the structural strength of the refrigerant heat exchange component, so that the refrigerant heat exchange component does not weaken the 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 are balanced.

[0047] In one of the embodiments, the refrigerant heat exchange flow channel is filled with a phase change medium.

[0048] In the embodiment, the phase change medium is filled in the refrigerant heat exchange flow channel, which is beneficial to improve the heat exchange efficiency and improve the performance stability of the battery device.

[0049] In one of the embodiments, the refrigerant heat exchange component is made of a combination of one or more of metals and non-metals.

[0050] In the embodiment, the material selection of the refrigerant heat exchange component is more flexible and variable, and can be flexibly combined and prepared according to the heat exchange requirements of the battery device, so that the refrigerant heat exchange component can maintain high heat conduction capacity and improve the overall performance of the battery thermal management system.

[0051] In a second aspect, the application provides a refrigerant heat exchange component, which has a refrigerant heat exchange flow channel inside, and the refrigerant heat exchange 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 connected in communication, the upstream flow channel in part of the heat exchange sub-flow channels is adjacent to and in thermal contact with the downstream flow channel in the adjacent heat exchange sub-flow channel, and the downstream flow channel in part of the heat exchange sub-flow channels is adjacent to and in thermal contact with the upstream flow channel in the adjacent heat exchange sub-flow channel.

[0052] In one of the embodiments, the plurality of heat exchange sub-flow channels are arranged in sequence along a first direction, and the upstream flow channel and the downstream flow channel in the heat exchange sub-flow channel are both arranged in extension along a second direction, and the second direction is perpendicular to the first direction.

[0053] In the embodiment, the upstream flow channel and the downstream flow channel are arranged in extension along the second direction and adjacent to each other, which is beneficial to increase the length of the adjacent area between the upstream flow channel and the downstream flow channel, and is beneficial to increase the adjacent heat exchange area and increase the heat exchange efficiency.

[0054] In one of the embodiments, the refrigerant heat exchange flow channel further includes a loop guide flow channel, and each downstream flow channel is in communication with the loop guide flow channel at an end away from the upstream flow channel; an edge region is formed on the surface of the refrigerant heat exchange component close to the edge, and the loop guide flow channel is arranged corresponding to the edge region.

[0055] In the embodiment, the edge region of the refrigerant heat exchange component corresponds to the loop guide flow channel, which can correspond to the battery monomer assembly of the edge region with lower temperature, thereby being beneficial to improve the balanced heat dissipation of the battery monomer assembly.

[0056] In one of the embodiments, the refrigerant heat exchange component has a flow channel group inside, the flow channel group includes two refrigerant heat exchange flow channels, the refrigerant heat exchange component has a symmetry plane, and the two refrigerant heat exchange flow channels are symmetrically arranged on both sides of the symmetry plane.

[0057] In the embodiment, the two refrigerant heat exchange flow channels are designed to be symmetrically arranged, which is beneficial to improve the balanced heat dissipation of the refrigerant heat exchange component to the battery monomer assembly.

[0058] In a third aspect, the present application provides a power consuming device comprising the battery device according to any one of the above aspects, wherein the battery device is used for storing or providing electric energy.

[0059] The above description is only a summary of the technical solutions of the present application. In order to make the technical means of the present application more clear and understandable, and to enable the above and other purposes, characteristics and advantages of the present application to be more apparent and easy to understand, the following will describe the specific embodiments of the present application in detail according to the contents of the description. BRIEF DESCRIPTION OF DRAWINGS

[0060] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments of the present application or the prior art description. Obviously, the drawings described below are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0061] Figure 1 The structural schematic diagram of the vehicle provided by some embodiments of the present application is shown in the figure;

[0062] Figure 2 The exploded structural schematic diagram of the battery device provided by some embodiments of the present application is shown in the figure; Figure 1

[0063] Figure 3 The exploded structural schematic diagram of the battery device provided by some embodiments of the present application is shown in the figure; Figure 2

[0064] Figure 4 The exploded structural schematic diagram of the refrigerant heat exchange component in the battery device provided by some embodiments of the present application is shown in the figure;

[0065] Figure 5 The relative position relationship between the refrigerant heat exchange flow channel and the battery monomer assembly in the battery device provided by some embodiments of the present application is shown in the figure; Figure 1

[0066] Figure 6 The relative position relationship between the refrigerant heat exchange flow channel and the battery monomer assembly in the battery device provided by some embodiments of the present application is shown in the figure; Figure 2

[0067] Figure 7 The structural schematic diagram of the refrigerant heat exchange flow channel on the refrigerant heat exchange component in the battery device provided by some embodiments of the present application is shown in the figure; Figure 1

[0068] Figure 8 The structural schematic diagram of the refrigerant heat exchange flow channel on the refrigerant heat exchange component in the battery device provided by some embodiments of the present application is shown in the figure; Figure 2 ​​​​​​

[0069] Figure 9 Structure of refrigerant heat exchange flow channel on refrigerant heat exchange component in battery device provided by some embodiments of the present application Figure 3 ;

[0070] Figure 10 Structure of refrigerant heat exchange flow channel on refrigerant heat exchange component in battery device provided by some embodiments of the present application Figure 9 Partial enlarged view of position A in the structure

[0071] Figure 11 Structure of refrigerant heat exchange flow channel on refrigerant heat exchange component in battery device provided by some embodiments of the present application Figure 8 Partial enlarged view of position B in the structure

[0072] Figure 12 Structure of refrigerant heat exchange flow channel on refrigerant heat exchange component in battery device provided by some embodiments of the present application Figure 9 Partial enlarged view of position C in the structure

[0073] Figure 13 Structure of refrigerant heat exchange flow channel on refrigerant heat exchange component in battery device provided by some embodiments of the present application Figure 9 Partial enlarged view of position D in the structure

[0074] Figure 14 Structure of refrigerant heat exchange flow channel on refrigerant heat exchange component in battery device provided by some embodiments of the present application Figure 9 Partial enlarged view of position E in the structure

[0075] Figure 15 Structure of refrigerant heat exchange flow channel on refrigerant heat exchange component in battery device provided by some embodiments of the present application Figure 9 Partial enlarged view of position F in the structure

[0076] Figure 16 Temperature distribution of refrigerant heat exchange flow channel of refrigerant heat exchange component in battery device provided by some embodiments of the present application

[0077] Explanation of reference signs:

[0078] 1000, vehicle; 1100, battery device; 1110, battery cell assembly; 1111, battery cell module; 1112, battery cell; 1120, case assembly; 1121, first part; 1122, second part; 11221, frame; 11222, case bottom; 1130, case body; 1131, cover; 1132, case 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; 1150, joint component; 1200, controller; 1300, motor; A, edge region; B, first uniform temperature region; C, second region; D, first region; E, sub-flow region; F, second uniform temperature region; X, first direction; Y, second direction; L1, first interval distance; L2, second interval distance; L3, third interval distance. DETAILED DESCRIPTION

[0079] The embodiments of the technical solutions 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 only serve as embodiments, but cannot limit the protection scope of the present application.

[0080] 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 terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the present application; the terms "include" and "have" and any variations thereof in the specification and claims of the present application and the above description of drawings are intended to cover non-exclusive inclusion.

[0081] 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 specified.

[0082] Reference to“an embodiment” herein 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 appearances of the phrase“in an embodiment” in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily mutually exclusive of one another. It is expressly understood that any of the embodiments described herein can be incorporated into any other embodiment in a manner known to those of ordinary skill in the art.

[0083] In the description of the embodiments of the application, the term“and / or” only means an association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which can mean that A exists alone, A and B exist together, and B exists alone. In addition, the character“ / ” herein generally means that the front and rear associated objects are in an“or” relationship.

[0084] In the description of the embodiments of the application, the term“a plurality of” means more than two (including two), and similarly, “a plurality of groups” means more than two groups (including two groups), and “a plurality of pieces” means more than two pieces (including two pieces).

[0085] In the description of the embodiments of the application, the technical terms“center”,“longitudinal”,“transverse”,“length”,“width”,“thickness”,“upper”,“lower”,“front”,“rear”,“left”,“right”,“vertical”,“horizontal”,“top”,“bottom”,“inner”,“outer”,“clockwise”,“counterclockwise”,“axial”,“radial”,“circumferential” and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the embodiments of the 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 application.

[0086] In the description of the embodiments of the application, unless otherwise explicitly specified and limited, the technical terms“mounting”,“connection”,“connection”,“fixing” and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship of two elements. For those of ordinary skill in the art, the specific meaning of the above terms in the embodiments of the application can be understood according to the specific circumstances.

[0087] 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 to be solved in the new energy vehicle industry to realize energy replenishment quickly and efficiently.

[0088] In the process of charging and discharging, the battery device in a new energy vehicle releases a large amount of heat. A heat exchange component is usually arranged in the battery device to exchange heat with the battery monomer assembly, so as to cool the battery monomer assembly.

[0089] Fast charging is a mainstream solution for new energy vehicles to achieve fast energy replenishment. However, many challenges are encountered in the implementation process. 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 fast charging conditions, the heat exchange component is more likely to cause uneven heat exchange with the battery monomer assembly, resulting in a sharp rise in the temperature of part of the battery monomer assembly and accumulation of a large amount of heat in the battery device, thereby affecting the use performance and service life of the battery device. Even greater risks exist in the use of the battery device. Therefore, guaranteeing 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.

[0090] Specifically, heat is generated in the battery device during charging and discharging. If the heat cannot be effectively dissipated, it may cause the performance of the battery device to decrease and the service life to be shortened. High temperature can accelerate the chemical reaction inside the battery device, increase the internal resistance of the battery device, reduce the energy density, and even cause thermal runaway in severe cases. Therefore, a heat exchange component is arranged in the battery device to cool the battery monomer assembly therein.

[0091] For the problem of uneven temperature distribution and local high temperature in the battery device, it is found through research that there is a large area of overheated region on the heat exchange component inside the battery device. The heat exchange capacity of the overheated region is low. The existence of the large area of overheated region reduces the heat exchange efficiency and heat exchange capacity of the battery monomer assembly, causes the temperature of the battery monomer assembly corresponding to the overheated region to rise sharply, leads to uneven temperature distribution on the entire battery monomer assembly, affects the normal use of the battery device, and in addition, the overheated region also causes the heat inside the battery device to be unable to diffuse in time, causing the temperature inside the battery device to rise, thereby affecting the use performance and service life of the battery monomer assembly and the battery device.

[0092] Further analysis, the refrigerant heat exchange component is internally provided with a refrigerant heat exchange flow channel, the inlet flow channel (corresponding to the upstream flow channel of the present application) in the refrigerant heat exchange flow channel is concentratedly arranged, the loop flow channel (corresponding to the downstream flow channel of the present application) is also concentratedly arranged, and the heat exchange medium (for example, heat exchange refrigerant) changes from liquid state to gaseous state after heat exchange in the inlet flow channel, and the heat exchange refrigerant is basically gasified in the loop flow channel. The heat exchange capacity of the gaseous heat exchange refrigerant is small, so that an overheating area is generated on the refrigerant heat exchange component, the heat exchange capacity of the battery monomer assembly is reduced by the overheating area, the loop flow channel is concentratedly arranged, and a large area of the overheating area is formed. The overheating area refers to an area with weak heat exchange capacity, and the large area of the overheating area affects the overall heat exchange effect of the battery monomer assembly, causes the temperature of the battery monomer assembly corresponding to the overheating area to sharply increase, and the temperature distribution of the battery monomer assembly is uneven. Heat accumulation, and then affect the use performance and service life of the battery monomer assembly and the battery device.

[0093] Therefore, the present application provides a battery device, based on the characteristics that the temperature of the area corresponding to the upstream flow channel on the refrigerant heat exchange component is high, and the temperature of the area corresponding to the downstream flow channel on the refrigerant heat exchange component is low, by parallelly arranging a plurality of heat exchange sub-flow channels in the refrigerant heat exchange component, and further adjacently arranging and heat-conducting the upstream flow channel and the downstream flow channel in the adjacent heat exchange sub-flow channels, the downstream flow channel and the upstream flow channel are heat-exchanged and heat-conducted, so that the temperature between the areas corresponding to the upstream flow channel and the downstream flow channel on the refrigerant heat exchange component is balanced, the area corresponding to the downstream flow channel on the refrigerant heat exchange component is not easy to form an overheating area, thereby reducing the area of the overheating area on the refrigerant heat exchange component, and the temperature distribution on the refrigerant heat exchange component is more balanced, thereby improving the balanced heat exchange capacity of the refrigerant heat exchange component on the battery monomer assembly, and improving the temperature balance of the battery monomer assembly. In addition, the reduction of the area of the overheating area is beneficial to improving the overall heat exchange capacity of the refrigerant heat exchange component, thereby improving the heat exchange effect of the battery monomer assembly, the heat in the battery device can be diffused in time, the overall temperature of the battery monomer assembly is more stable, and the use performance and service life of the battery monomer assembly and the battery device are improved.

[0094] Specifically, referring to Figure 2As shown, 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.

[0095] The battery apparatus 1100 disclosed by the embodiments of the present application can be used in various energy storage devices and energy storage 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.

[0096] 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.

[0097] Please refer to Figure 1 , Figure 1 The vehicle 1000 provided by some embodiments of the present application is shown in a structural schematic diagram. 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.

[0098] 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.

[0099] Please refer to Figure 2 as shown, Figure 2This is an exploded view of a battery device 1100 provided in some embodiments of this application. In one embodiment, the battery device 1100 includes a housing assembly 1120 and a battery cell assembly 1110. A receiving cavity 1133 is formed within the housing assembly 1120, and the battery cell assembly 1110 is housed within the receiving cavity 1133. The battery cell assembly 1110 is typically formed by arranging multiple battery cells 1112. Alternatively, the battery cell assembly 1110 can also be a battery module, which is formed by arranging and fixing multiple battery cells 1112 to form an independent module. The housing assembly 1120 provides the receiving cavity 1133 for the battery cell assembly 1110, and the housing assembly 1120 can adopt various structures.

[0100] A battery cell 1112 refers to the smallest unit that makes up the battery device 1100. Each battery cell 1112 can be a secondary battery cell or a primary battery cell; it can also be a lithium-sulfur battery cell, a sodium-ion battery cell, or a magnesium-ion battery cell, but is not limited to these. The battery cell 1112 can be cylindrical, flat, cuboid, or other shapes.

[0101] According to some embodiments of this application, refer to Figures 2-5 As shown in the figure, this application provides a battery device 1100, which includes a housing assembly 1120, a battery cell assembly 1110, and a refrigerant heat exchange component 1140. The housing assembly 1120 has a receiving cavity 1133 inside; the battery cell assembly 1110 is disposed within the receiving cavity 1133; the refrigerant heat exchange component 1140 is configured to exchange heat with the battery cell assembly 1110; the refrigerant heat exchange component 1140 has a refrigerant heat exchange channel 1144 inside. 44 includes multiple heat exchange sub-channels 11441 arranged in parallel. Each heat exchange sub-channel 11441 includes an upstream channel 11442 and a downstream channel 11443 that are connected. The upstream channel 11442 in some heat exchange sub-channels 11441 is adjacent to and thermally compatible with the downstream channel 11443 in the adjacent heat exchange sub-channel 11441. The downstream channel 11443 in some heat exchange sub-channels 11441 is adjacent to and thermally compatible with the upstream channel 11442 in the adjacent heat exchange sub-channel 11441.

[0102] Specifically, for the box assembly 1120, the box assembly 1120 is used to accommodate the battery monomer assembly 1110, the box assembly 1120 has a containing cavity 1133, which can be a closed cavity, or the containing cavity 1133 can also be a cavity with an opening, when the containing cavity 1133 is a closed cavity, the refrigerant heat exchange component 1140 can be accommodated in the containing cavity 1133, when the containing cavity 1133 is a cavity with an opening, the refrigerant heat exchange component 1140 can be connected to the opening side of the box assembly 1120, and the refrigerant heat exchange component 1140 and the box assembly 1120 together define a closed cavity. The box assembly 1120 can be of various shapes, such as a cylinder, a cuboid, etc.

[0103] The battery monomer assembly 1110 includes one or more battery monomers 1112, and the refrigerant heat exchange component 1140 needs to exchange heat (i.e., heat exchange) with the battery monomer assembly 1110. Generally, the refrigerant heat exchange component 1140 needs to be arranged close to the battery monomer assembly 1110, or the refrigerant heat exchange component 1140 needs to directly contact or abut the battery monomer assembly 1110, so as to improve the heat exchange effect. When the refrigerant heat exchange component 1140 exchanges heat with the battery monomer assembly 1110, a large heat exchange area needs to be formed between the refrigerant heat exchange component 1140 and the battery monomer assembly 1110 to improve the heat exchange effect, so a heat exchange surface 1143 close to or in contact with the surface of the battery monomer 1112 will be formed on the refrigerant heat exchange component 1140.

[0104] The surface of the battery monomer 1112 close to or in contact with the heat exchange surface 1143 can be the bottom surface of the battery monomer 1112 or the side surface of the battery monomer 1112. Taking the example of horizontally placing the battery device 1100, the surface below the battery monomer 1112 is the bottom surface, and the surface of the battery monomer 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 arranged close to the bottom surface or the side surface of the battery monomer 1112, that is, the refrigerant heat exchange component 1140 can be located at the bottom of the battery monomer assembly 1110, or can be located at the side of the battery monomer assembly 1110. The refrigerant heat exchange component 1140 located at the bottom of the battery monomer assembly 1110 can also be commonly referred to as a heat exchange bottom plate or a cooling bottom plate.

[0105] The following embodiments are described for convenience by taking the example of horizontally placing a battery device 1100 of an embodiment of the present application, and the refrigerant heat exchange component 1140 being located at the bottom of the battery monomer assembly 1110.

[0106] In the battery device 1100, the refrigerant heat exchange component 1140 can adopt a direct cooling heat exchange mode, and the heat exchange medium can adopt a refrigerant heat exchange medium. Therefore, the flow channel defined inside the refrigerant heat exchange component 1140 is defined as the refrigerant heat exchange flow channel 1144. For the refrigerant heat exchange flow channel 1144 inside the refrigerant heat exchange component 1140, as shown in Figure 4 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 a plate shape, 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, which forms the refrigerant heat exchange flow channel 1144.

[0107] The refrigerant heat exchange component 1140 can adopt an integrated structure, and the refrigerant heat exchange flow channel 1144 can be prepared by adopting a gas-assisted or water-assisted forming mode. Alternatively, the refrigerant heat exchange component 1140 can also adopt a combined forming mode. 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 recess structure with a predetermined extension length and extension shape, which can be prepared by adopting a stamping forming mode. The first sub-component 1141 is fixedly or detachably connected with the second sub-component 1142, and the slot of the recess structure is closed to form a through-hole structure or a cavity structure, that is, to form the refrigerant heat exchange flow channel 1144.

[0108] For example, the first sub-component 1141 can be an upper plate, and the second sub-component 1142 can be a lower plate. The refrigerant heat exchange flow channel 1144 is formed on the lower plate by adopting a stamping forming mode. The first sub-component 1141 and the second sub-component 1142 can be welded by adopting a brazing mode. The welded area can have a heat transfer matching function.

[0109] For another example, the refrigerant heat exchange component 1140 is prepared by adopting a bent pipe. The bent pipe extends and bends in a plane parallel to the heat exchange surface 1143. Therefore, the lumen of the bent pipe forms the refrigerant heat exchange flow channel 1144, and the surface of the bent pipe facing the battery monomer assembly 1110 forms the heat exchange surface 1143. The heat-conducting glue is arranged between the two adjacent pipe bodies in the bent pipe. Therefore, the upstream flow channel 11442 and the downstream flow channel 11443 can achieve the purpose of heat transfer through the heat-conducting glue.

[0110] Referring to Figure 5 and Figure 7As shown, the refrigerant heat exchange flow channel 1144 includes a plurality of heat exchange sub-flow channels 11441, each of which forms a heat exchange loop, that is, each heat exchange sub-flow channel 11441 has a heat exchange inlet and a heat exchange outlet, and each heat exchange sub-flow channel 11441 is in communication with an upstream flow channel 11442 and a 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 from the heat exchange inlet, then flows to the downstream flow channel 11443, and then flows out from the heat exchange outlet, forming a circulating heat exchange.

[0111] The heat exchange medium is heat exchange refrigerant, so that the present refrigerant heat exchange component 1140 adopts a direct cooling heat exchange mode, and the heat exchange process is that the heat exchange medium changes from liquid to gas after heat exchange in the upstream flow channel 11442, the amount of liquid heat exchange refrigerant in the upstream flow channel 11442 is large, the phase change heat exchange amount is large, the heat exchange capacity for the battery monomer assembly 1110 is strong, the heat exchange refrigerant enters the downstream flow channel 11443 from the upstream flow channel 11442, and the heat exchange refrigerant is basically gasified in the downstream flow channel 11443, the heat exchange amount of the gaseous heat exchange refrigerant is small, so that the heat exchange capacity for the battery monomer assembly 1110 is reduced.

[0112] Suppose that the downstream flow channels 11443 in 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 area on the heat exchange surface 1143 area corresponding to the downstream flow channel 11443, the overheated area refers to an area with weak heat exchange capacity, and a large area of overheated 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 then affecting the use performance and service life of the battery monomer assembly 1110 and the battery device 1100.

[0113] 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 channels 11441 is adjacent to and in thermal contact with the downstream flow channel 11443 in the adjacent heat exchange sub-flow channels 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 the adjacent heat exchange sub-flow channels 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.

[0114] 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. Figure 11

[0115] ​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.

[0116] 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.

[0117] In combination Figure 16 The temperature distribution of the refrigerant heat exchange flow channel is shown in the figure. It can be obviously found that the temperature of the downstream flow channel 11443 adjacent to the upstream flow channel 11442 is obviously balanced, Figure 16 In the figure, the darker the red color, the higher the temperature, the darker the green color, the lower the temperature, and the size of the number reflects the high and low of the temperature.

[0118] In the embodiment, the upstream flow channel 11442 and the downstream flow channel 11443 in the adjacent 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, the temperature of the region on the heat exchange surface 1143 corresponding to the downstream flow channel 11443 is reduced, thereby 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, thereby improving the heat exchange uniformity of the battery monomer assembly 1110.

[0119] In some embodiments, referring to Figure 5 and Figure 6 It is shown that the plurality of heat exchange sub-flow channels 11441 are arranged in sequence along the first direction, the upstream flow channel 11442 and the downstream flow channel 11443 in the heat exchange sub-flow channel 11441 are arranged in extension along the second direction, and the second direction Y is perpendicular to the first direction X.

[0120] 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.

[0121] Specifically, the first direction X is parallel to the heat exchange surface 1143. Taking the refrigerant heat exchange component 1140 as a plate as an example, the heat exchange surface 1143 can be formed on one side of the plate of the refrigerant heat exchange component 1140. When the first direction X is the width direction of the plate, the second direction Y is the length direction of the plate. The upstream flow channel 11442 and the downstream flow channel 11443 are both extended along the second direction Y. It can be seen that the upstream flow channel 11442 and the downstream flow channel 11443 are parallel and spaced apart. The extension direction of the upstream flow channel 11442 and the downstream flow channel 11443 is along the length direction of the plate. A heat exchange sub-flow channel 11441 may include multiple upstream flow channels 11442 and multiple downstream flow channels 11443. Along the second direction Y, the upstream flow channel 11442 and the downstream flow channel 11443 are connected at one end.

[0122] In this embodiment, the upstream flow channel 11442 and the downstream flow channel 11443 are extended in the second direction Y and arranged adjacent to each other. This is beneficial to increasing the length of the adjacent area between the upstream flow channel 11442 and the downstream flow channel 11443, which is beneficial to increasing the area of ​​adjacent heat exchange and increasing the efficiency of heat exchange.

[0123] In some embodiments, refer to Figure 6 and Figure 7 As shown, the refrigerant heat exchange channel 1144 also includes at least one inlet channel 11444 and at least one outlet channel 11445. One inlet channel 11444 is connected to multiple upstream channels 11442, and one outlet channel 11445 is connected to multiple downstream channels 11443.

[0124] Specifically, the inlet channel 11444 is the inlet for the heat exchange medium to enter the interior of the refrigerant heat exchange component 1140. One or more inlet channels 11444 can be provided. One inlet channel 11444 can be connected to multiple upstream channels 11442. If the inlets of each upstream channel 11442 are called sub-inlets 114421, it can be seen that after the heat exchange medium enters the inlet channel 11444, it will form multiple branches and connect with multiple sub-inlets 114421. These multiple branches can be understood as multiple inlet branch channels.

[0125] Similarly, the outlet flow channel 11445 is the outlet through which the heat exchange medium flows out to the outside of the refrigerant heat exchange component 1140. One or more outlet flow channels 11445 can be provided. One outlet flow channel 11445 can be connected to multiple downstream flow channels 11443. If the outlet of each downstream flow channel 11443 is called a sub-outlet 114431, then it can be seen that after the heat exchange medium flows out of the sub-outlet 114431, it will be connected to the outlet flow channel 11445 through multiple branches.

[0126] 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, thereby facilitating the increase in the number of upstream flow channels 11442 and downstream flow channels 11443, reasonable planning and layout, and the improvement in the uniformity of the layout, so as to facilitate the improvement in the temperature uniformity of the heat exchange surface 1143 (i.e., the refrigerant heat exchange component 1140).

[0127] In some embodiments, as shown in Figs. Figure 7 , Figure 8 and Figure 14 , the refrigerant heat exchange flow channel 1144 further includes a first sub-flow channel 11446 and multiple second sub-flow channels 11447 each in communication with the first sub-flow channel 11446. The first sub-flow channel 11446 extends along the first direction X and is in communication with the inlet flow channel 11444. Each second sub-flow channel 11447 extends along the second direction Y and is distributed to correspond to each upstream flow channel 11442.

[0128] Specifically, the first sub-flow channel 11446 and the second sub-flow channel 11447 are connection flow channels between the inlet flow channel 11444 and each upstream flow channel 11442, respectively. The heat exchange medium first passes through the first sub-flow channel 11446 and then enters each second sub-flow channel 11447, which respectively corresponds to each corresponding upstream flow channel 11442. The first sub-flow channel 11446 and the second sub-flow channel 11447 correspondingly form a sub-flow region E on the heat exchange surface 1143.

[0129] The first sub-flow channel 11446 can be provided with one or more, and one first sub-flow channel 11446 is in communication with multiple second sub-flow channels 11447, respectively. The first sub-flow channel 11446 extends along the first direction X, and the extension length direction of the first sub-flow channel 11446 is the same as the arrangement direction of each heat exchange sub-flow channel 11441, thereby making the heat exchange medium flow more smoothly in the first sub-flow channel 11446, and facilitating the reduction of the flow path of the heat exchange medium from the inlet flow channel 11444 to the second sub-flow channel 11447 and the upstream flow channel 11442, and the reduction of heat exchange loss.

[0130] Each second branch flow channel 11447 is arranged to extend along the second direction Y, that is, each second branch flow channel 11447 is arranged in parallel to and spaced apart from each other, each second branch flow channel 11447 is in communication with the first branch flow channel 11446 perpendicularly, and each downstream flow channel 11443 is also arranged to extend along the second direction Y, so that each second branch flow channel 11447 is opposite to each downstream flow channel 11443, thereby enabling the heat exchange medium to flow more smoothly from each second branch flow channel 11447 into each downstream flow channel 11443, and facilitating to shorten the flow path of the heat exchange medium between the downstream flow channels 11443 and to reduce heat loss.

[0131] The first branch flow channel 11446 and the second branch flow channel 11447 can also be understood as part of the inlet flow channel 11444, and the heat exchange medium (i.e., the heat exchange coolant) enters the inside of the coolant heat exchange component 1140, which aims to reduce the problem of temperature difference of the coolant heat exchange component 1140 caused by uneven distribution, and 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. Therefore, the dryness of the heat exchange medium is the smallest when the heat exchange medium enters the coolant heat exchange component 1140, and the heat exchange medium is affected the least when the distribution is performed in this area. Generally, the area is divided into a plurality of second branch flow channels 11447, which aims to provide a plurality of upstream flow channels 11442 to reduce the influence of the poor heat exchange capacity of a heat exchange sub-flow channel 11441 on the uniform temperature of the cold plate, and the upstream flow channel 11442 and the downstream flow channel 11443 in any two adjacent heat exchange sub-flow channels 11441 can be balanced with each other, further improving the uniform temperature performance of the coolant heat exchange component 1140. The effective lengths of the plurality of heat exchange sub-flow channels 11441 should be consistent, reducing the influence of uneven distribution caused by the difference in flow resistance in each first branch flow channel 11446 and second branch flow channel 11447, thereby further reducing the temperature difference of the heat exchange surface 1143 and improving the uniform temperature performance of the coolant heat exchange component 1140.

[0132] In the embodiment, the first branch flow channel 11446 and the second branch flow channel 11447 are connecting flow channels between the inlet flow channel 11444 and the downstream flow channel 11443, 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, which is conducive to improving the flow smoothness of the heat exchange medium; each second branch flow channel 11447 is perpendicular to the first branch flow channel 11446, and each second branch flow channel 11447 is opposite to each downstream flow channel 11443, which improves the flow smoothness of the heat exchange medium and is conducive to reducing the flow path of the heat exchange medium and reducing heat loss.

[0133] In some embodiments, as shown in Figs. Figure 8 , Figure 9 and Figure 15 , the inlet flow channel 11444 is arranged adjacent to the outlet flow channel 11445.

[0134] 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 correspondingly 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 refrigerant in the inlet flow channel 11444 can heat the low-temperature heat exchange refrigerant in the outlet flow channel 11445, so as to request a larger flow of heat exchange refrigerant from the external conveying system to further reduce the temperature difference on the refrigerant heat exchange component 1140 (specifically, the heat exchange surface 1143).

[0135] 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 refrigerant, thereby balancing the temperature difference of the heat exchange surface 1143.

[0136] In some embodiments, referring to Figure 7 As shown, along the first direction X, the two end positions of the refrigerant heat exchange flow channel 1144 are respectively configured as downstream flow channels 11443.

[0137] Specifically, along the first direction X, the refrigerant heat exchange flow channel 1144 has two end positions, which can be respectively understood as the head end and the tail end of the refrigerant heat exchange flow channel 1144; the refrigerant heat exchange flow channel 1144 is arranged with a plurality of heat exchange sub-flow channels 11441 along the first direction X, so it can be known that the two end positions respectively include two heat exchange sub-flow channels 11441, which are the heat exchange sub-flow channel 11441 at the head end and the heat exchange sub-flow channel 11441 at the tail end.

[0138] The two end positions of the refrigerant heat exchange flow channel 1144 are respectively configured as downstream flow channels 11443, which means that the downstream flow channel 11443 in the heat exchange sub-flow channel 11441 at the head end is located on the side away from the adjacent heat exchange sub-flow channel 11441; the downstream flow channel 11443 in the heat exchange sub-flow channel 11441 at the tail end is located on the side away from the adjacent heat exchange sub-flow channel 11441, that is, along the first direction X, the downstream flow channel 11443, the upstream flow channel 11442, the downstream flow channel 11443, …, the upstream flow channel 11442, the downstream flow channel 11443 are sequentially arranged, so that the two downstream flow channels 11443 are respectively located at two edge-close positions of the heat exchange surface 1143.

[0139] In this embodiment, since the heat exchange capacity of the downstream flow channel 11443 is low, the temperature of the corresponding heat exchange surface 1143 region is relatively high, and the temperature of the battery monomer assembly 1110 corresponding to the edge position is lower than that of the battery monomer assembly 1110 in the middle region. The relatively high-temperature heat exchange surface 1143 region matches the relatively low-temperature battery monomer assembly 1110, so that the two ends of the first direction X match the downstream flow channel 11443, realizing coordinated matching of the temperature, which is more conducive to realizing the balanced heat dissipation of the battery monomer assembly 1110.

[0140] In some embodiments, referring to Figure 7 and Figure 8 , along the first direction X, the inlet flow channel 11444 and the outlet flow channel 11445 are located on the same side; the refrigerant heat exchange flow channel 1144 further includes a loop guide flow channel 11448, each downstream flow channel 11443 has a sub-outlet 114431 on the side away from the inlet flow channel 11444, and the outlet flow channel 11445 is connected to each sub-outlet 114431 through the loop guide flow channel 11448; along the first direction X, the loop guide flow channel 11448 is located at one end or both ends of the refrigerant heat exchange flow channel 1144.

[0141] Specifically, along the first direction X, the inlet flow channel 11444 and the outlet flow channel 11445 are located on the same side, for example, having an extension axis along the first direction X, then the inlet flow channel 11444 and the outlet flow channel 11445 are located on one side of the extension axis, and the inlet flow channel 11444 and the outlet flow channel 11445 can be arranged adjacent to each other.

[0142] The loop guide flow channel 11448 is a connecting flow channel connecting 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 include 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 respectively located at both ends of the refrigerant heat exchange flow channel 1144 along the first direction X, that is, the first end position and the tail end position of the refrigerant heat exchange flow channel 1144 are arranged with the loop guide flow channel 11448.

[0143] Each downstream flow channel 11443 has a sub-outlet 114431, and the sub-outlet 114431 is located on the side of the downstream flow channel 11443 away from the inlet flow channel 11444, that is, along the second direction Y, the heat exchange medium flows in from one end and flows out from the other end, and then enters the loop guide flow channel 11448, so that the fluid flows into the outlet flow channel 11445 from the edge of the heat exchange surface 1143 along the first direction X.

[0144] 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 the temperature 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 Figure 16 the temperature distribution of the refrigerant heat exchange flow channel, it can be clearly found that the temperature of the downstream flow channel 11443 adjacent to the upstream flow channel 11442 is 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.

[0145] In this embodiment, by 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, by 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, which has a 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.

[0146] In some embodiments, as shown in Figure 5 , Figures 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 outlet flow channel 11445 and each sub-outlet 114431.

[0147] 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, which communicate between the outlet flow channel 11445 and each sub-outlet 114431, so as to improve the flow efficiency and reduce the accumulation and blockage of the heat exchange medium.

[0148] Since the upstream flow channel 11442 and the downstream flow channel 11443 are both arranged 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 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, which is conducive to improving the balanced heat dissipation.

[0149] 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.

[0150] In some embodiments, referring to Figure 7 As shown, 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 at intervals along the first direction X, and the two adjacent upstream flow channels 11442 have a second interval distance L2; the downstream flow channel 11443 in each heat exchange sub-flow channel 11441 is provided with multiple and arranged at intervals along the first direction X, and the two adjacent downstream flow channels 11443 have a third interval distance L3; the first interval distance L1 is smaller than the second interval distance L2 and the third interval distance L3.

[0151] 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.

[0152] The first interval distance L1 is smaller 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.

[0153] In this embodiment, by making the interval distance between the multiple guide sub-flow channels 11449 smaller 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.

[0154] In some embodiments, referring to Figure 6 , Figures 8-10 andFigure 16 As shown, the edge region A is formed on the surface of the refrigerant heat exchange component 1140 close to the edge, and the circuit guide flow channel 11448 is arranged corresponding to the edge region A.

[0155] 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 should be understood as the edge close to the position region 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, the edge region A is arranged corresponding to the circuit guide flow channel 11448. Figure 8 And Figure 9 As shown, only one or two edge regions A close to the edge on both ends of the refrigerant heat exchange component 1140 in the first direction X are studied on the surface of the refrigerant heat exchange component 1140 forming the heat exchange surface 1143. It can be considered that the surface of the refrigerant heat exchange component 1140 forming the heat exchange surface 1143 has one edge region A or two edge regions A.

[0156] 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. In the case of one circuit guide flow channel 11448, one edge region A is provided and arranged corresponding to the circuit guide flow channel 11448; in the case of two circuit guide flow channels 11448, two edge regions A are provided and arranged corresponding to the two circuit guide flow channels 11448, respectively.

[0157] The temperature of the circuit guide flow channel 11448 corresponding to the region on the surface of the refrigerant heat exchange component 1140 is high. It can be found that in the battery monomer assembly 1110, the temperature of the battery monomer assembly 1110 close to the edge of the refrigerant heat exchange component 1140 and close to the side wall part of the box assembly 1120 is lower than that of the middle region of the battery monomer assembly 1110. 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 Figure 16 As shown, 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 not easy to occur.

[0158] In this 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 with lower temperature in the edge region A, thereby being beneficial to improve the balanced heat dissipation of the battery monomer assembly 1110.

[0159] In some embodiments, in combination with Figure 6As shown, the edge region A avoids the battery monomer assembly 1110.

[0160] Specifically, taking the example of horizontally placing the battery device 1100, the position below the edge region A is the loop guide flow channel 11448. Since the heat exchange capacity of the heat exchange medium in the loop guide flow channel 11448 is reduced, the temperature of the edge region A is prone to rise. If the edge region A abuts against the battery monomer assembly 1110, it will inevitably affect the heat exchange of the part of the battery monomer assembly 1110, and the risk of the temperature of the battery monomer assembly 1110 rising sharply is prone to occur. Therefore, in the embodiment, the battery monomer assembly 1110 is avoided from the edge region A, that is, the battery monomer assembly 1110 is not placed above the edge region A, so that the battery monomer 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 monomer assembly 1110.

[0161] In the embodiment, the battery monomer assembly 1110 avoids the edge region A prone to overheating, thereby reducing the influence of overheating on the battery monomer assembly 1110, and playing a protective role on the battery monomer assembly 1110.

[0162] In some embodiments, referring to Figure 3 As shown, the battery device 1100 further includes a box body 1130, and 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.

[0163] 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 oppositely arranged with the refrigerant heat exchange component 1140. The box body 1130 can be in various shapes, such as a cylinder, a cuboid, etc.

[0164] The refrigerant heat exchange component 1140 can be connected to the box body 1130, and the refrigerant heat exchange component 1140 can form a box bottom plate, so that the refrigerant heat exchange component 1140 can be used to support the battery monomer assembly 1110 while performing heat exchange with the battery monomer assembly 1110, which is conducive to simplifying the structure of the external box body 1130 and reducing the weight of the battery device 1100.

[0165] 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.

[0166] In some embodiments, as shown in Figure 9 , Figure 12 and Figure 13 , the refrigerant heat exchange component 1140 has a heat exchange surface 1143, the heat exchange surface 1143 has a first area D and a second area C, in the first direction X, the second area C is distributed in the middle of the heat exchange surface 1143, and the first area D is distributed on both sides of the second area C; a plurality of heat exchange sub-flow channels 11441 correspond to the second area C, and a plurality of heat exchange sub-flow channels 11441 correspond to the first area 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 area 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 area D.

[0167] Specifically, the first area D and the second area C are areas 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 a second area C in the middle and a first area 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.

[0168] 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.

[0169] Therefore, it can be understood that the second region C can be understood as a preferential cooling zone, 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.

[0170] 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.

[0171] 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.

[0172] In some embodiments, with reference to Figures 7-9As shown, the refrigerant heat exchange component 1140 has a flow channel group inside, and the flow channel group includes two refrigerant heat exchange flow channels 1144. The refrigerant heat exchange component 1140 has a symmetry plane 1145, and the two refrigerant heat exchange flow channels 1144 are symmetrically arranged on both sides of the symmetry plane 1145.

[0173] Specifically, the flow channel group can be understood as the total of all refrigerant heat exchange flow channels 1144 arranged inside the refrigerant heat exchange component 1140, and the flow channel group includes two refrigerant heat exchange flow channels 1144. Each refrigerant heat exchange flow channel 1144 further includes a plurality of heat exchange sub-flow channels 11441, and each heat exchange sub-flow channel 11441 further includes a plurality of upstream flow channels 11442, a plurality of downstream flow channels 11443, and a loop guide flow channel 11448.

[0174] The symmetry plane 1145 should be understood as a virtual surface, and the symmetry plane 1145 should be understood as an imaginary plane perpendicular to the heat exchange surface 1143. The projection of the symmetry plane 1145 on the heat exchange surface 1143 forms a symmetry axis, and the symmetry axis should be understood as the symmetry line of the heat exchange surface 1143. The battery cell assembly 1110 on both sides of the symmetry axis should be symmetrically arranged.

[0175] The flow channel group is divided into two refrigerant heat exchange flow channels 1144, so that the two refrigerant heat exchange flow channels 1144 are symmetrically arranged about the symmetry plane 1145. Since the temperature distribution of the battery cell assembly 1110 on both sides of the symmetry plane 1145 is relatively symmetrical, by symmetrically designing the refrigerant heat exchange flow channels 1144 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 assembly 1110 and controlling the temperature distribution difference of the symmetry area of the battery cell assembly 1110 within the design range.

[0176] In this embodiment, by designing the two symmetrically arranged refrigerant heat exchange flow channels 1144, the balanced heat dissipation of the refrigerant heat exchange component 1140 to the battery cell assembly 1110 is facilitated.

[0177] In some embodiments, referring to Figure 5 and Figure 6 As shown, 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.

[0178] Specifically, each battery cell module 1111 includes a plurality of battery cells 1112 arranged in sequence 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 channel 11442 and the downstream flow channel 11443. The plurality of upstream flow channels 11442 and the plurality of downstream flow channels 11443 can also be arranged in the width direction of the battery cell module 1111, so that the upstream flow channel 11442 and the downstream flow channel 11443 are more evenly distributed between the battery cell module 1111, which is beneficial to improve the heat exchange uniformity of the battery cell assembly 1110 to the refrigerant heat exchange flow channel 1144.

[0179] 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 improvement of the heat exchange uniformity of the battery cell assembly 1110 to the refrigerant heat exchange flow channel 1144.

[0180] In some embodiments, referring to Figure 2 As shown in the figure, the refrigerant heat exchange component 1140 is located in the accommodation cavity 1133 and is arranged on the tank bottom part 11222 of the tank assembly 1120 to support the battery cell assembly 1110.

[0181] For the tank assembly 1120, the tank assembly 1120 is used to accommodate the battery cell assembly 1110, and the tank 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 an accommodation 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 accommodation 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 accommodation cavity 1133 together with the second part 1122. The tank assembly 1120 can have various shapes, such as a cylinder, a cuboid, etc. The second part 1122 can include a frame 11221 and a tank bottom part 11222. The tank bottom part 11222 can be a plate structure, so the tank bottom part 11222 is also called a tank bottom plate. The frame 11221 is arranged around to form the side wall of the tank assembly 1120. The frame 11221 forms two openings at the top and bottom. The tank bottom part 11222 is connected with the bottom opening of the frame 11221, and the second part 1122 is connected with the upper opening of the frame 11221.

[0182] Generally, the battery device 1100 is horizontally placed, and the tank bottom plate is horizontal. The refrigerant heat exchange component 1140 can be placed on the tank bottom plate. At this time, the refrigerant heat exchange component 1140 can be in a plate shape. An 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 on the heat exchange surface 1143. The refrigerant heat exchange component 1140 can also support and hold the battery cell assembly 1110.

[0183] In the embodiment, the refrigerant heat exchange component 1140 is placed on the tank bottom portion 11222 of the tank assembly 1120, so that the bottom of the battery cell assembly 1110 is heat exchanged. The heat exchange area is large, which is conducive to improving the heat exchange efficiency.

[0184] In some embodiments, referring to Figure 3 As shown in the figure, the tank assembly 1120 includes a tank body 1130. The refrigerant heat exchange component 1140 is connected to the tank body 1130 and cooperates with the tank body 1130 to form a containing cavity 1133. The battery cell assembly 1110 is contained in the containing cavity 1133. The refrigerant heat exchange component 1140 can be used to support the battery cell assembly 1110.

[0185] Specifically, the tank body 1130 can include a cover body 1131 and a tank frame 1132. The cover body 1131 and the tank frame 1132 are covered with each other. The cover body 1131, the tank frame 1132, and the refrigerant heat exchange component 1140 cooperatively define a containing cavity 1133 for containing the battery cell assembly 1110. The cover body 1131 can be a plate structure. The tank frame 1132 can be a hollow structure with two open ends. For example, the tank frame 1132 is a ring frame structure. The cover body 1131 is covered on one open side of the tank frame 1132. The refrigerant heat exchange component 1140 is connected to the other open side of the tank frame 1132. The cover body 1131 can be arranged opposite to the refrigerant heat exchange component 1140. The tank body 1130 can be in various shapes, such as a cylinder, a cuboid, etc.

[0186] In the embodiment, the refrigerant heat exchange component 1140 can be connected to the tank body 1130. The refrigerant heat exchange component 1140 can form a tank bottom plate. Thus, the refrigerant heat exchange component 1140 can be used to support the battery cell assembly 1110 while heat exchanging with the battery cell assembly 1110. This is conducive to simplifying the structure of the external tank body 1130 and reducing the weight of the battery device 1100.

[0187] In some embodiments, referring to Figures 2-9As shown, the battery device 1100 further comprises a joint component 1150, which is connected to the refrigerant heat exchange component 1140 and is in communication with each of the inlet flow channels 11444 and the outlet flow channels 11445, respectively.

[0188] The joint component 1150 is provided with flow channel inlets and flow channel outlets. The flow channel inlets are in communication with each of the inlet flow channels 11444 and the sub-inlets 114421 of the upstream flow channels 11442, respectively. The flow channel outlets are in communication with each of the outlet flow channels 11445 and the sub-outlets 114431 of the downstream flow channels 11443, respectively. The joint component 1150 can be connected to the refrigerant heat exchange component 1140 by welding, or 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.

[0189] In this embodiment, the joint component 1150 is provided to facilitate the connection with external pipelines for conveying heat exchange medium (i.e. heat exchange refrigerant), thereby improving the convenience of assembly.

[0190] In some embodiments, the width of the refrigerant heat exchange flow channel 1144 ranges from 6 mm to 15 mm.

[0191] Specifically, since the refrigerant heat exchange flow channel 1144 comprises the upstream flow channels 11442 and the downstream flow channels 11443, the width of the refrigerant heat exchange flow channel 1144 refers to the width dimension of the upstream flow channels 11442 and the downstream flow channels 11443 in the plane parallel to the heat exchange surface 1143 and perpendicular to the extension direction. For example, if the upstream flow channels 11442 and the downstream flow channels 11443 extend along the second direction Y, the width of the upstream flow channels 11442 and the downstream flow channels 11443 refers to the width dimension of the upstream flow channels 11442 and the downstream flow channels 11443 in the first direction X.

[0192] If the width of the refrigerant heat exchange flow channel 1144 is too small, the flow resistance of the refrigerant can increase, which can reduce the heat exchange effect. If the width of the refrigerant heat exchange flow channel 1144 is too large, the flow rate of the refrigerant can be too slow to remove heat in time.

[0193] In this embodiment, the width of the refrigerant heat exchange flow channel 1144 is set to range from 6 mm to 15 mm, which can ensure the circulation of the refrigerant at a reasonable pressure drop and flow rate, and guarantee the stable operation of the thermal management system of the entire battery device.

[0194] In some embodiments, the width of the refrigerant heat exchange flow channel 1144 ranges from 6 mm to 10 mm.

[0195] Similarly, referring to the above embodiments, the width of the refrigerant heat exchange channel 1144 is too large or too small, which will affect the heat exchange of the refrigerant heat exchange component 1140 to the battery monomer assembly 1110. Therefore, further experiments are carried out to make the width of the refrigerant heat exchange channel 1144 range from 6 to 10 mm, so that the width data of the refrigerant heat exchange channel 1144 is more accurate.

[0196] 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, so that the refrigerant heat exchange component 1140 will not weaken the strength due to the excessive width of the refrigerant heat exchange channel 1144, and the balance between the heat exchange performance and the structural strength of the refrigerant heat exchange component 1140 can be achieved.

[0197] In some embodiments, the refrigerant heat exchange channel 1144 is filled with a phase change medium.

[0198] Specifically, the phase change medium is a substance that can change its phase at a certain temperature and absorb or release a large amount of latent heat during the phase change. In this example, the heat exchange medium uses 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 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 temperature of the battery device 1100. The use of phase change medium as heat exchange medium helps to keep the temperature of the battery device 1100 relatively stable, reduces the problem of capacity attenuation and shortens the life of the battery device 1100 caused by excessive temperature, or the problem of increased internal resistance and reduced charging and discharging efficiency of the battery device 1100 caused by low temperature, thereby improving the overall performance, reliability and stability of the battery device 1100.

[0199] It should be noted that the phase change medium and the refrigerant can work together. For example, in a large-scale battery energy storage system, the refrigerant is responsible for transferring the heat generated by the battery 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 quickly absorbs heat and changes phase to relieve the rapid temperature rise, giving the refrigerant more time to dissipate heat. The two work together to improve the efficiency and stability of the thermal management system.

[0200] In this embodiment, the refrigerant heat exchange channel 1144 is filled with a phase change medium, which is beneficial to improve the efficiency of heat exchange and improve the performance stability of the battery device 1100.

[0201] In some embodiments, the refrigerant heat exchange component 1140 is made of a combination of one or more of metal and non-metal.

[0202] 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 heat conduction performance in high temperature environment. The combination of metal and non-metal can fully exert their respective heat conduction advantages, so that the refrigerant heat exchange component 1140 can always maintain high efficient heat conduction ability under different working temperature intervals and heat load conditions, and the overall performance of the battery thermal management system is improved.

[0203] In this 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 efficient heat conduction ability, and the overall performance of the battery thermal management system is improved.

[0204] In a specific embodiment, referring to Figures 2-16As shown, the battery device 1100 comprises a box assembly 1120, a battery cell assembly 1110 and a refrigerant heat exchange component 1140, wherein the box assembly 1120 is internally provided with a containing cavity 1133; the battery cell assembly 1110 is arranged in the containing cavity 1133; the refrigerant heat exchange component 1140 is configured to exchange heat with the battery cell assembly 1110; the refrigerant heat exchange component 1140 is internally provided with a refrigerant heat exchange flow channel 1144, the refrigerant heat exchange flow channel 1144 comprises a plurality of heat exchange sub-flow channels 11441 arranged in parallel, each heat exchange sub-flow channel 11441 comprises an upstream flow channel 11442 and a downstream flow channel 11443 connected in communication, the upstream flow channel 11442 in part of the heat exchange sub-flow channels 11441 is adjacent to and in thermal conduction with the downstream flow channel 11443 in the adjacent heat exchange sub-flow channel 11441, the downstream flow channel 11443 in part of the heat exchange sub-flow channels 11441 is adjacent to and in thermal conduction with the upstream flow channel 11442 in the adjacent heat exchange sub-flow channel 11441; the plurality of heat exchange sub-flow channels 11441 are arranged in sequence along a first direction X, the upstream flow channel 11442 and the downstream flow channel 11443 in the heat exchange sub-flow channel 11441 are both arranged in extension along a second direction Y, the second direction Y is perpendicular to the first direction X; the refrigerant heat exchange flow channel 1144 further comprises at least one inlet flow channel 11444 and at least one outlet flow channel 11445, the inlet flow channel 11444 is connected in communication with the plurality of upstream flow channels 11442, the outlet flow channel 11445 is connected in communication with the plurality of downstream flow channels 11443; the refrigerant heat exchange flow channel 1144 further comprises a first branch flow channel 11446 and a plurality of second branch flow channels 11447 connected in communication with the first branch flow channel 11446, the first branch flow channel 11446 is arranged in extension along the first direction X, the first branch flow channel 11446 is connected in communication with the inlet flow channel 11444; each second branch flow channel 11447 is arranged in extension along the second direction Y, each second branch flow channel 11447 is respectively arranged in correspondence with each upstream flow channel 11442; the second direction Y is perpendicular to the first direction X; the inlet flow channel 11444 is arranged adjacent to the outlet flow channel 11445; the refrigerant heat exchange flow channel 1144 further comprises a loop guide flow channel 11448, each downstream flow channel 11443 has a sub-outlet 114431 on the side away from the inlet flow channel 11444, the outlet flow channel 11445 is connected in communication with each sub-outlet 114431 through the loop guide flow channel 11448; along the first direction X, the loop guide flow channel 11448 is located at one end or both ends of the refrigerant heat exchange flow channel 1144; an edge region A is formed on the surface of the refrigerant heat exchange component 1140 close to the edge position, the loop guide flow channel 11448 is arranged in correspondence with the edge region A; the edge region A avoids the arrangement of the battery cell assembly 1110; the refrigerant heat exchange component 1140 is internally provided with a flow channel group, the flow channel group comprises two refrigerant heat exchange flow channels 1144, the refrigerant heat exchange component 1140 has a symmetry plane 1145, the two refrigerant heat exchange flow channels 1144 are symmetrically arranged on both sides of the symmetry plane 1145.

[0205] According to some embodiments of the present application, the present application further provides a refrigerant heat exchange component 1140, which has a refrigerant heat exchange flow channel 1144 inside, and the refrigerant heat exchange flow channel 1144 comprises a plurality of heat exchange sub-flow channels 11441 arranged in parallel, each of the heat exchange sub-flow channels 11441 comprises an upstream flow channel 11442 and a downstream flow channel 11443 connected in communication, and the upstream flow channel 11442 in part of the heat exchange sub-flow channels 11441 is adjacent to and in thermal conduction 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 channels 11441 is adjacent to and in thermal conduction with the upstream flow channel 11442 in the adjacent heat exchange sub-flow channel 11441.

[0206] In some embodiments, 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 both arranged in extension along a second direction Y perpendicular to the first direction X.

[0207] In some embodiments, the refrigerant heat exchange flow channel 1144 further comprises a loop guide flow channel 11448, and each of the downstream flow channels 11443 is arranged in communication with the loop guide flow channel 11448 at an end away from the upstream flow channel 11442; an edge region A is formed on a surface of the refrigerant heat exchange component 1140 close to an edge, and the loop guide flow channel 11448 is arranged corresponding to the edge region A.

[0208] In some embodiments, the refrigerant heat exchange component 1140 has a flow channel group inside, and the flow channel group comprises two refrigerant heat exchange flow channels 1144, and the refrigerant heat exchange component 1140 has a symmetry plane 1145, and the two refrigerant heat exchange flow channels 1144 are arranged symmetrically on two sides of the symmetry plane 1145.

[0209] The example of the refrigerant heat exchange component 1140 in the present application is based on the example of the battery device 1100 described above, and the structure of the refrigerant heat exchange component 1140 in the example of the battery device 1100 described above is the same as that of the refrigerant heat exchange component 1140 in the present example, and the technical effects are the same, which will not be described here again, and can be referred to the description of the battery device 1100 described above.

[0210] 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-described embodiments, and the power conversion device is used to electrically connect the power generation device and the energy storage device.

[0211] Specifically, the energy storage device can include one or more battery clusters to increase the voltage and capacity of the energy storage device. The battery cluster can include a plurality of battery devices 1100 connected in series by busbar components to increase the voltage of the energy storage device. When the energy storage device includes a plurality of battery clusters, the plurality of battery clusters are connected in parallel to increase the capacity of the energy storage device.

[0212] The energy storage device can be used in energy storage power stations, wind power systems, solar power systems, mobile power systems, or temporary power supply systems, etc. The energy storage device can store electrical energy as needed and output electrical energy at the appropriate time. For example, the energy storage device can store electrical energy during the low electricity consumption period, and provide electrical energy for related users or electrical equipment during the peak electricity consumption period. The energy storage system provided by the embodiments of the present application can be any power system that needs to use an energy storage device.

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

[0214] In some embodiments, the energy storage device can include a cabinet body and one or more battery clusters, and the battery clusters are contained in the cabinet body.

[0215] 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.

[0216] As an example, the thermal management module can include a liquid cooling unit that provides cooling liquid to each battery device 1100 through a pipeline to adjust the temperature of the battery cell.

[0217] As an example, the master control module can serve as a battery management unit of the battery cluster to monitor and manage 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), a fusion switch, and other modules.

[0218] As an example, the master control module can be used as a battery management unit of the energy storage device, for monitoring and managing the energy storage device. The master 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, voltage, etc. of the energy storage device can be controlled. As an example, the master 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.

[0219] As an example, the fire control module includes a control panel, a detector, an alarm device, etc., for detecting, alarming, or extinguishing the energy storage system.

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

[0221] According to some embodiments of the present application, the present application also provides an energy storage system, which includes a power conversion device and the energy storage device in the above embodiments, and the power conversion device is used to electrically connect the power generation device and the energy storage device.

[0222] In some embodiments, the energy storage system can include one or more energy storage devices and a power conversion device (Power Converter System, PCS) connected 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 in 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 power generation device is not limited in the present application.

[0223] According to some embodiments of the present application, referring to Figure 1 As shown in the figure, the present application also provides a power consumption device, which includes the battery device 1100 in the above embodiments, the energy storage device in the above embodiments, or the energy storage system in the above embodiments, and the battery device 1100 is used to store or provide electric energy.

[0224] 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, etc. For example, the spacecraft includes an airplane, a rocket, a space shuttle, and a spacecraft, etc.

[0225] The example of the power-using device in the present application is based on the example of the battery device 1100 described above, and the example of the power-using device contains all the technical effects of the example of the battery device 1100 described above, and will not be described again.

[0226] According to some embodiments of the present application, the present application also 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 configured to provide electric energy for the charging pile.

[0227] For example, the charging network comprises the charging pile and the energy storage device, the charging pile is electrically connected with the energy storage device, and the energy storage device is configured 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, and the connectors are configured to be connected with the power-using device (such as the vehicle 1000), so that the power-using device can be charged.

[0228] The energy storage device can be located inside the charging pile (for example, a charging and storing integrated machine) or outside the charging pile.

[0229] The above is only a preferred embodiment of the present application, and only the technical principle of the present application is described, and these descriptions are only for explaining the principle of the present application, and cannot be explained as a limitation on the protection scope of the present application in any way. Based on the explanation here, any modification, equivalent replacement and improvement made within the spirit and principle of the present application, and other specific embodiments of the present application which can be easily thought 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, The application relates to a battery pack, which comprises: a box assembly (1120) internally provided with a containing cavity (1133); a battery cell assembly (1110) arranged in the containing cavity (1133); a refrigerant heat exchange component (1140) configured to exchange heat with the battery cell assembly (1110); the refrigerant heat exchange component (1140) is internally provided with a refrigerant heat exchange flow channel (1144) comprising a plurality of heat exchange sub-flow channels (11441) arranged in parallel; each of the heat exchange sub-flow channels (11441) comprises an upstream flow channel (11442) and a downstream flow channel (11443) connected in communication; the upstream flow channel (11442) in part of the heat exchange sub-flow channels (11441) is adjacent to and in thermal conduction cooperation 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 channels (11441) is adjacent to and in thermal conduction cooperation with the upstream flow channel (11442) in the adjacent heat exchange sub-flow channel (11441).

2. The battery device (1100) of claim 1, 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.

3. The battery device (1100) according to claim 1 or 2, characterized in that The refrigerant heat exchange flow channel (1144) further comprises at least one inlet flow channel (11444) and at least one outlet flow channel (11445); the inlet flow channel (11444) is connected in communication with the plurality of upstream flow channels (11442), and the outlet flow channel (11445) is connected in communication with the plurality of downstream flow channels (11443).

4. The battery device (1100) of claim 3, wherein, The refrigerant heat exchange flow channel (1144) further comprises a first branch flow channel (11446) and a plurality of second branch flow channels (11447) connected in communication with the first branch flow channel (11446); the first branch flow channel (11446) is arranged along the first direction (X) and connected in communication with the inlet flow channel (11444); each of the second branch flow channels (11447) is arranged along the second direction (Y) and connected in communication with the corresponding upstream flow channel (11442); and the second direction (Y) is perpendicular to the first direction (X).

5. The battery apparatus (1100) of claim 3, wherein, The inlet flow channel (11444) is arranged adjacent to the outlet flow channel (11445).

6. The battery device (1100) of claim 2, wherein, Along the first direction (X), the two end positions of the refrigerant heat exchange flow channel (1144) are respectively configured as downstream flow channels (11443).

7. The battery device (1100) of claim 3, wherein, The inlet flow channel (11444) and the outlet flow channel (11445) are located on the same side along the first direction (X); the refrigerant heat exchange flow channel (1144) further comprises a loop guide 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 in communication with each of the sub-outlets (114431) through the loop guide flow channel (11448); along the first direction (X), the loop guide flow channel (11448) is located at one end or both ends of the refrigerant heat exchange flow channel (1144).

8. The battery device (1100) of claim 7, wherein, The loop guide flow channel (11448) comprises a plurality of guide sub-flow channels (11449) extending along a second direction (Y) and in communication, and the plurality of guide sub-flow channels (11449) are in communication between the outlet flow channel (11445) and each of the sub-outlets (114431).

9. The battery device (1100) of claim 8, wherein, Along the first direction (X), two adjacent guide sub-flow channels (11449) have a first interval distance (L1); the upstream flow channels (11442) in each of the heat exchange sub-flow channels (11441) are provided in a plurality and arranged at intervals along the first direction (X), and two adjacent upstream flow channels (11442) have a second interval distance (L2); the downstream flow channels (11443) in each of the heat exchange sub-flow channels (11441) are provided in a plurality and arranged at intervals along the first direction (X), and two adjacent downstream flow channels (11443) have a third interval distance (L3); the first interval distance (L1) is smaller than the second interval distance (L2) and the third interval distance (L3).

10. The battery apparatus (1100) of claim 7, wherein, An edge region (A) is formed on the surface of the refrigerant heat exchange component (1140) near the edge, and the loop guide flow channel (11448) is arranged corresponding to the edge region (A).

11. The battery device (1100) of claim 10, wherein, The edge region (A) avoids the battery monomer assembly (1110).

12. The battery device (1100) of claim 3, wherein, 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), along 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 from the inlet flow channel (11444) to the upstream flow channel (11442) in the plurality of heat exchange sub-flow channels (11441) corresponding to the second region (C) is smaller than the flow path from the inlet flow channel (11444) to the upstream flow channel (11442) in the plurality of heat exchange sub-flow channels (11441) corresponding to the first region (D).

13. The battery device (1100) according to claim 1 or 2, characterized in that The refrigerant heat exchange component (1140) has a flow channel group inside, and the flow channel group includes two refrigerant heat exchange flow channels (1144). The refrigerant heat exchange component (1140) has a symmetry plane (1145), and the two refrigerant heat exchange flow channels (1144) are symmetrically arranged on both sides of the symmetry plane (1145).

14. The battery device (1100) of claim 2, wherein, The battery cell assembly (1110) includes a plurality of battery cell modules (1111) arranged along the first direction (X), and each battery cell module (1111) includes a plurality of battery cells (1112) arranged along the second direction (Y).

15. The battery device (1100) according to claim 1 or 2, characterized in that The refrigerant heat exchange component (1140) is located in the accommodating cavity (1133) and is arranged on the box bottom (11222) of the box assembly (1120) to support the battery cell assembly (1110).

16. The battery device (1100) according to claim 1 or 2, characterized in that The box assembly (1120) includes a box body (1130), and the refrigerant heat exchange component (1140) is connected to the box body (1130) and cooperates with the box body (1130) to form an accommodating cavity (1133), and the refrigerant heat exchange component (1140) can be used to support the battery cell assembly (1110).

17. The battery device (1100) of claim 3, wherein, The battery device (1100) further includes a joint component (1150) connected to the refrigerant heat exchange component (1140) and respectively communicating with each inlet flow channel (11444) and each outlet flow channel (11445).

18. The battery device (1100) according to any one of claims 1-17, characterized by The width of the refrigerant heat exchange flow channel (1144) ranges from 6 to 15 mm.

19. The battery device (1100) according to any one of claims 1-17, characterized by The width of the refrigerant heat exchange flow channel (1144) ranges from 6 to 10 mm.

20. The battery device (1100) according to any one of claims 1-17, characterized by The refrigerant heat exchange flow channel (1144) is filled with a phase change medium.

21. The battery device (1100) according to any one of claims 1-17, characterized by The refrigerant heat exchange component (1140) is made of a combination of one or more of metal and non-metal.

22. A refrigerant heat exchange component (1140) characterized by, The refrigerant heat exchange component (1140) has refrigerant heat exchange flow channels (1144) inside, and the refrigerant heat exchange flow channels (1144) include a plurality of parallelly arranged heat exchange sub-flow channels (11441). Each heat exchange sub-flow channel (11441) includes an upstream flow channel (11442) and a downstream flow channel (11443) in communication. 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 the 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 the adjacent heat exchange sub-flow channel (11441).

23. The refrigerant heat exchange component (1140) of Claim 22, wherein, A 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, and the second direction (Y) is perpendicular to the first direction (X).

24. The refrigerant heat exchange component (1140) of Claim 22, wherein, The refrigerant heat exchange flow channel (1144) further comprises a loop guide flow channel (11448), each of the downstream flow channels (11443) is in communication with the loop guide flow channel (11448) at an end away from the upstream flow channel (11442); an edge region (A) is formed on a surface of the refrigerant heat exchange component (1140) near an edge, and the loop guide flow channel (11448) is arranged corresponding to the edge region (A).

25. The refrigerant heat exchange component (1140) of Claim 22, wherein, The refrigerant heat exchange component (1140) has a flow channel group inside, the flow channel group comprises two refrigerant heat exchange flow channels (1144), and the refrigerant heat exchange component (1140) has a symmetry plane (1145), and the two refrigerant heat exchange flow channels (1144) are symmetrically arranged on two sides of the symmetry plane (1145).

26. An electrical device, comprising: The battery device (1100) comprises the battery device (1100) according to any one of claims 1-21, and the battery device (1100) is used for storing or providing electric energy.

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