Battery device, refrigerant heat exchange component, energy storage device and power utilization device

Abstract

The utility model is applicable to the technical field of batteries, and provides a battery device, a refrigerant heat exchange component, an energy storage device and an electric device. A heat exchange flow channel is formed in the refrigerant heat exchange component and comprises at least two sub heat exchange flow channels, and each sub heat exchange flow channel comprises at least two branch flow channels. Each sub heat exchange runner comprises a first sub heat exchange runner and a second sub heat exchange runner; the refrigerant heat exchange component further comprises a heat exchange face corresponding to the heat exchange flow channel, the heat exchange face is provided with a first area and a second area, and the arrangement density of all branch flow channels in the first sub heat exchange flow channel in the first area is larger than the arrangement density of all branch flow channels in the second sub heat exchange flow channel in the second area. According to the battery device provided by the embodiment of the invention, the heat exchange capability of the refrigerant heat exchange component in the part of the battery monomer assembly corresponding to the first area is improved, so that the temperatures of different parts of the battery monomer assembly are more uniform.

Description

[0001] This 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 batteries, in particular to a battery device, a refrigerant heat exchange component, an energy storage device and an electric device. BACKGROUND

[0003] At present, from the development of market situation, the application of battery devices is more and more extensive. The battery devices are not only applied to energy storage power systems such as hydroelectric, thermal, wind and solar power stations, but also widely applied to electric vehicles such as electric bicycles, electric motorcycles, electric vehicles, electric vehicles, military equipment and aerospace, and many other fields. With the continuous expansion of the application field of battery devices, the market demand is also increasing.

[0004] In the process of using the current battery device, the temperature of each battery monomer located in the middle of the battery device is higher than that of the battery monomer located in the periphery, the temperature control effect of the refrigerant heat exchange component on each battery monomer in the middle of the battery device is also poor, and the temperature distribution of the battery monomers at different positions in the battery device is uneven and has large difference. Utility model content

[0005] In view of the above problems, the present application provides a battery device, a refrigerant heat exchange component, an energy storage device and an electric device, which can alleviate the problem of uneven temperature distribution of battery monomers at different positions in the battery device.

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

[0007] a battery monomer assembly; a refrigerant heat exchange component, which has a heat exchange flow channel inside, the heat exchange flow channel is used for refrigerant heat exchange medium to flow through, the heat exchange flow channel comprises at least two sub heat exchange flow channels arranged in sequence along a first direction, each sub heat exchange flow channel comprises at least two sub flow channels which are communicated with each other, and each sub flow channel is arranged at intervals; each sub heat exchange flow channel comprises a first sub heat exchange flow channel and at least one second sub heat exchange flow channel, and each second sub heat exchange flow channel is located on one side or opposite sides of the first sub heat exchange flow channel; the refrigerant heat exchange component further comprises a heat exchange surface corresponding to the heat exchange flow channel, the first direction is parallel to the heat exchange surface, and the heat exchange surface is arranged close to or in contact with the battery monomer assembly; the heat exchange surface has a first area and a second area, the first area corresponds to the first sub heat exchange flow channel, and the second area corresponds to the second sub heat exchange flow channel, and the arrangement density of each sub flow channel in the first sub heat exchange flow channel in the first area is greater than the arrangement density of each sub flow channel in the second sub heat exchange flow channel in the second area.

[0008] In the technical solution of the embodiment, the heat exchange flow channel includes the first sub heat exchange flow channel and the at least one second sub heat exchange flow channel, and the arrangement density of the branch flow channels in the first sub heat exchange flow channel in the first area is greater than the arrangement density of the branch flow channels in the second sub heat exchange flow channel in the second area. The heat exchange capacity of the refrigerant heat exchange component on the corresponding part of the battery monomer assembly in the first area is improved, so as to better exchange heat with the part of the battery monomer assembly with a faster temperature change speed, thereby making the temperature of different parts of the battery monomer assembly more uniform, and the temperature uniformity of the battery monomer assembly is improved.

[0009] In some embodiments, the ratio of the arrangement density of each branch flow channel in the first sub heat exchange flow channel in the first area to the arrangement density of each branch flow channel in the second sub heat exchange flow channel in the second area ranges from 1.5 to 4.

[0010] The technical solution of the embodiment provides a ratio range of the arrangement density of the branch flow channels in some first sub heat exchange flow channels to the arrangement density of the branch flow channels in the second sub heat exchange flow channel, so that the first sub heat exchange flow channel can have better heat exchange capacity at the first area, so that the refrigerant heat exchange component can more efficiently exchange heat with the part of the battery monomer assembly with a faster temperature change, thereby improving the temperature uniformity of the battery monomer assembly.

[0011] In some embodiments, each branch flow channel in the first sub heat exchange flow channel is arranged at a first interval, and each branch flow channel in the second sub heat exchange flow channel is arranged at a second interval, and the first interval is smaller than the second interval.

[0012] In the technical solution of the embodiment, the interval of each branch flow channel in the first sub heat exchange flow channel is smaller than the interval of each branch flow channel in the second sub heat exchange flow channel, so that the arrangement density of the branch flow channels in the first sub heat exchange flow channel in the first area is greater than the arrangement density of the branch flow channels in the second sub heat exchange flow channel in the second area, so that the refrigerant heat exchange component can more efficiently exchange heat with the part of the battery monomer assembly with a faster temperature change, thereby improving the temperature uniformity of the battery monomer assembly.

[0013] In some embodiments, the first interval ranges from 2 mm to 7 mm.

[0014] The technical solution of the embodiment provides a range of the first interval, so that the interval of each branch flow channel in the first sub heat exchange flow channel is smaller, so that the arrangement density of the branch flow channels in the first sub heat exchange flow channel in the first area can be greater, and the heat exchange efficiency can be higher.

[0015] In some embodiments, the second interval ranges from 20 mm to 30 mm.

[0016] The technical scheme of the embodiment provides the range of the second spacing, so that the spacing of each branch flow channel in the second sub heat exchange flow channel is greater than the spacing of each branch flow channel in the first sub heat exchange flow channel, and thus the arrangement density of the branch flow channels in the first sub heat exchange flow channel in the first area is greater than the arrangement density of the branch flow channels in the second sub heat exchange flow channel in the second area.

[0017] In some embodiments, the width of the branch flow channel ranges from 5 mm to 12 mm.

[0018] The technical scheme of the embodiment provides the range of the width of the branch flow channel, so that the single branch flow channel and the battery monomer have a certain heat exchange area, and thus the branch flow channel and the battery monomer can be conveniently heat exchanged.

[0019] In some embodiments, the sub heat exchange flow channel further comprises a third sub heat exchange flow channel, the third sub heat exchange flow channel is arranged on the side of the second sub heat exchange flow channel away from the first sub heat exchange flow channel along the first direction; the heat exchange surface further has a third area, the third area corresponds to the third sub heat exchange flow channel, and the arrangement density of each branch flow channel in the second sub heat exchange flow channel in the second area is greater than the arrangement density of each branch flow channel in the third sub heat exchange flow channel in the third area.

[0020] In the technical scheme of the embodiment, the third sub heat exchange flow channel is arranged on the side of the second sub heat exchange flow channel away from the first sub heat exchange flow channel, and the arrangement density of the branch flow channel in the third sub heat exchange flow channel is less than the arrangement density of the branch flow channel in the second sub heat exchange flow channel, so as to form a flow channel structure with different arrangement densities at different positions of the refrigerant heat exchange component; because the battery monomer assembly usually has different temperature change speeds at different positions, the arrangement enables the refrigerant heat exchange component to heat exchange at different heat exchange efficiencies at different positions of the battery monomer assembly, so as to reduce the temperature difference of the battery monomer assembly at different positions and improve the temperature uniformity of the battery monomer assembly.

[0021] In some embodiments, in the first direction, the first sub heat exchange flow channel is located in the middle of the refrigerant heat exchange component, and each second sub heat exchange flow channel is arranged on both sides of the first sub heat exchange flow channel along the first direction.

[0022] In the technical scheme of the embodiment, because the heat dissipation performance of the battery monomer in the middle of the battery monomer assembly is usually poor, the temperature change speed of the battery monomer in the middle of the battery monomer assembly is usually fast; accordingly, the first sub heat exchange flow channel is arranged in the middle of the refrigerant heat exchange component, so that the first sub heat exchange flow channel corresponds to the middle of the battery monomer assembly, and thus the first sub heat exchange flow channel can heat exchange the middle of the battery monomer assembly more efficiently.

[0023] In some embodiments, in the first direction, each second sub heat exchange flow channel is symmetrically arranged on both sides of the first sub heat exchange flow channel.

[0024] In the technical scheme of the embodiment, the heat dissipation performance of the battery monomer assembly gradually increases from the middle part to the two sides, that is, the temperature change speed of the battery monomer assembly gradually decreases from the middle part to the two sides; accordingly, the second sub heat exchange flow channel is symmetrically arranged on the two sides of the first sub heat exchange flow channel to adapt to the temperature change speed distribution of the battery monomer assembly.

[0025] In some embodiments, the refrigerant heat exchange component further comprises a joint, and the refrigerant heat exchange component further has a transmission flow channel, each sub heat exchange flow channel is in communication with the joint through the transmission flow channel; the refrigerant heat exchange medium enters the first sub heat exchange flow channel from the joint through the transmission flow channel along a first path, and the refrigerant heat exchange medium enters the second sub heat exchange flow channel from the joint through the transmission flow channel along a second path, and the length of the first path is less than the length of the second path.

[0026] In the technical scheme of the embodiment, the refrigerant enters the first sub heat exchange flow channel and the second sub heat exchange flow channel through the first path and the second path respectively, and the length of the first path is less than the length of the second path. In this case, the refrigerant can first enter the first sub heat exchange flow channel and exchange heat with the corresponding part of the battery monomer assembly, so that the refrigerant heat exchange component can first exchange heat with the part of the battery monomer assembly with a faster temperature change speed, and the refrigerant heat exchange component can provide different heat exchange efficiencies at different positions of the battery monomer assembly, thereby improving the temperature uniformity of the battery monomer assembly.

[0027] In some embodiments, in the first direction, the joint is located in the middle part of the refrigerant heat exchange component.

[0028] In the technical scheme of the embodiment, the joint is located in the middle part of the refrigerant heat exchange component to further shorten the length of the refrigerant from the joint to the first sub heat exchange flow channel, so that the refrigerant can enter the first sub heat exchange flow channel faster and exchange heat with the middle part of the battery monomer assembly faster.

[0029] In some embodiments, the shunt flow channel comprises an inlet flow channel and a return flow channel, and the inlet flow channel and the return flow channel are in communication with the transmission flow channel.

[0030] In the technical scheme of the embodiment, the inlet flow channel and the return flow channel of the shunt flow channel are in communication with the transmission flow channel, so that the transmission flow channel can supply the refrigerant to enter each shunt flow channel and flow out of each shunt flow channel.

[0031] In some embodiments, the transmission flow channel comprises an inlet flow channel and an outlet flow channel, the inlet flow channel is in communication with each inlet flow channel, and the outlet flow channel is in communication with each return flow channel; the inlet flow channel and the outlet flow channel are in communication with the joint, and the first path and the second path are formed in the inlet flow channel.

[0032] The technical scheme of the embodiment provides specific structures of some transmission flow channels, so that the refrigerant can enter each branch flow channel through the inlet flow channel, and the refrigerant in the branch flow channel can be discharged to the outside of the refrigerant heat exchange component through the outlet flow channel.

[0033] In some embodiments, at least part of the inlet flow channel is arranged adjacent to the outlet flow channel.

[0034] In the technical scheme of the embodiment, at least part of the inlet flow channel is arranged adjacent to the outlet flow channel, so that the adjacent parts of the inlet flow channel and the outlet flow channel can exchange heat, thereby improving the temperature uniformity of the refrigerant heat exchange component.

[0035] In some embodiments, the inlet flow channel is arranged adjacent to the return flow channel.

[0036] In the technical scheme of the embodiment, the inlet flow channel is arranged adjacent to the return flow channel, so that the inlet flow channel and the adjacent return flow channel can exchange heat, thereby further improving the temperature uniformity of the refrigerant heat exchange component.

[0037] In some embodiments, in the same sub heat exchange flow channel, the inlet flow channel is arranged adjacent to the return flow channel.

[0038] The technical scheme of the embodiment provides specific structures of some inlet flow channels arranged adjacent to return flow channels, so that the inlet flow channel and the return flow channel in the same sub heat exchange flow channel are arranged adjacent to each other, so that the inlet flow channel and the return flow channel in the same sub heat exchange flow channel can exchange heat, thereby improving the temperature uniformity of the single sub heat exchange flow channel.

[0039] In some embodiments, the inlet flow channel in one sub heat exchange flow channel is arranged adjacent to the return flow channel in another adjacent sub heat exchange flow channel.

[0040] The technical scheme of the embodiment provides specific structures of some inlet flow channels arranged adjacent to return flow channels, which can reduce the temperature difference between the adjacent parts of the two adjacent sub heat exchange flow channels, thereby further improving the temperature uniformity of the refrigerant heat exchange component.

[0041] In some embodiments, the outlet flow channel includes a main outlet flow channel and sub outlet flow channels in communication with the main outlet flow channel, the main outlet flow channel is in communication with the joint, the number of the sub outlet flow channels is at least two, each sub outlet flow channel is in communication with each return flow channel, and each sub outlet flow channel is arranged at the edge of the refrigerant heat exchange component.

[0042] In the technical scheme of the embodiment, each sub outlet flow channel is in communication with each sub return flow channel, and each sub outlet flow channel is located at the edge of the refrigerant heat exchange component, so as to stagger the part with rapid temperature change in the refrigerant heat exchange component and the part with rapid temperature change in the battery monomer assembly, thereby reducing the negative impact of the refrigerant heat exchange component on the temperature uniformity of the battery monomer assembly.

[0043] In some embodiments, the heat exchange surface comprises an edge region corresponding to at least part of each sub-outlet flow channel, the edge region being arranged offset from the battery cell assembly.

[0044] In the technical solution of the present embodiment, the sub-outlet flow channels are arranged offset from the battery cell assembly, i.e. the sub-outlet flow channels are difficult to exchange heat with the battery cell assembly, thereby further reducing the negative impact of the refrigerant heat exchange component on the temperature uniformity of the battery cell assembly.

[0045] In some embodiments, each sub-outlet flow channel comprises a first flow channel section and a second flow channel section in communication with the first flow channel section, the first flow channel section being in communication with the main outlet flow channel, and the second flow channel section being in communication with the corresponding loop flow channel; each first flow channel section is arranged adjacent to another first flow channel section, and the edge region corresponds to at least each first flow channel section.

[0046] The technical solution of the present embodiment provides specific structures of some sub-outlet flow channels, so that each flow channel is in communication with each sub-outlet flow channel; at the same time, each first flow channel section is located at the edge of the refrigerant heat exchange component, so as to reduce the negative impact of the first flow channel section on the temperature uniformity of the battery cell assembly.

[0047] In a second aspect, the embodiments of the present application also provide a refrigerant heat exchange component, which has a heat exchange flow channel inside, the heat exchange flow channel being used for passing a refrigerant heat exchange medium, the heat exchange flow channel comprising at least two sub-heat exchange flow channels arranged in a first direction in sequence, each sub-heat exchange flow channel comprising at least two sub-flow channels in communication with each other, each sub-flow channel being arranged spaced apart; each sub-heat exchange flow channel comprises a first sub-heat exchange flow channel and at least one second sub-heat exchange flow channel, each second sub-heat exchange flow channel being located on one side or opposite sides of the first sub-heat exchange flow channel; the refrigerant heat exchange component further comprises a heat exchange surface corresponding to the heat exchange flow channel, the first direction being parallel to the heat exchange surface; the heat exchange surface has a first region and a second region, the first region corresponding to the first sub-heat exchange flow channel, and the second region corresponding to the second sub-heat exchange flow channel, the arrangement density of each sub-flow channel in the first sub-heat exchange flow channel in the first region being greater than the arrangement density of each sub-flow channel in the second sub-heat exchange flow channel in the second region.

[0048] In a third aspect, the embodiments of the present application also provide an energy storage device comprising the battery device provided by some embodiments of the first aspect, or the refrigerant heat exchange component provided by some embodiments of the second aspect.

[0049] In a fourth aspect, the embodiments of the present application also provide an electric device comprising the battery device provided by some embodiments of the first aspect, or the refrigerant heat exchange component provided by some embodiments of the second aspect, or the energy storage device provided by the third aspect.

[0050] 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 clearly understood and implemented according to the content of the specification, and in order to make the above and other purposes, characteristics and advantages of the present application more obvious and easy to understand, the following specific embodiments of the present application are described. BRIEF DESCRIPTION OF DRAWINGS

[0051] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The accompanying drawings are included to provide a better understanding of the preferred embodiments, and are not to be considered as limiting of the present application. Moreover, in the drawings, like reference numerals denote similar parts throughout the several views. In the drawings:

[0052] Figure 1 Structural schematic diagram of a vehicle provided for some embodiments of the present application;

[0053] Figure 2 Exploded structural schematic diagram of a battery device provided for some embodiments of the present application;

[0054] Figure 3 Exploded structural schematic diagram of a battery cell provided for some embodiments of the present application;

[0055] Figure 4 Top view schematic diagram of a battery cell assembly and a refrigerant heat exchange component provided for some embodiments of the present application Figure 1 ;

[0056] Figure 5 Top view schematic diagram of a battery cell assembly and a refrigerant heat exchange component provided for some embodiments of the present application Figure 2 ;

[0057] Figure 6 Top view schematic diagram of a refrigerant heat exchange component provided for some embodiments of the present application Figure 1 ;

[0058] Figure 7 Top view schematic diagram of a refrigerant heat exchange component provided for some embodiments of the present application Figure 2 ;

[0059] Figure 8 Structural schematic diagram of a first sub heat exchange flow channel provided for some embodiments of the present application;

[0060] Figure 9 Structural schematic diagram of a second sub heat exchange flow channel provided for some embodiments of the present application;

[0061] Figure 10 Structural schematic diagram of a sub outlet flow channel provided for some embodiments of the present application.

[0062] The meanings of the marks in the figures are as follows:

[0063] 1000, vehicle;

[0064] 100, battery device;

[0065] 10, case; 11, top cover; 12, frame; 13, bottom plate;

[0066] 20, battery cell assembly; 21, battery cell; 211, end cap; 212, case; 213, electrode assembly; 214, electrode terminal;

[0067] 30, refrigerant heat exchange component; 31, heat exchange flow passage; 311, sub heat exchange flow passage; 311a, first sub heat exchange flow passage; 311b, second sub heat exchange flow passage; 3111, branch flow passage; 31111, inlet flow passage; 31112, return flow passage; 32, heat exchange surface; 321, first region; 322, second region; 323, edge region; 33, joint; 34, transmission flow passage; 341, inlet flow passage; 342, outlet flow passage; 3421, main outlet flow passage; 3422, sub outlet flow passage; 34221, first flow passage section; 34222, second flow passage section;

[0068] 200, motor;

[0069] 300, controller;

[0070] X, width direction of the battery device; Y, length direction of the battery device. DETAILED DESCRIPTION

[0071] The embodiments of the technical scheme 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 scheme of the present application, and therefore only serve as examples, and cannot limit the protection scope of the present application.

[0072] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments of the present application, 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.

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

[0074] Reference 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.

[0075] 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 have an“or” relationship.

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

[0077] In the description of the embodiments of the 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 limiting the embodiments of the application.

[0078] 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 in a broad sense, for example, can be fixedly connected, or can be detachably connected, or can be integrated; can be mechanically connected, or can be electrically connected; can be directly connected, or can be indirectly connected through an intermediate medium; can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the embodiments of the application can be understood according to the specific circumstances.

[0079] At present, from the development of market situation, the application of battery device is more and more extensive. The battery device is not only applied to the energy storage power supply system of water power, fire power, wind power and solar power station, but also widely applied to electric bicycles, electric motorcycles, electric vehicles and other electric vehicles, military equipment, aerospace and other fields. With the continuous expansion of the application field of battery device, the demand of its market is also increasing.

[0080] In the process of using the battery device, a part of the battery cells located at the periphery of the battery cell assembly can directly exchange heat with the space inside the battery device. From the periphery to the middle of the battery cell assembly, the temperature of the battery cell assembly is higher and higher, the temperature of each battery cell located at the middle of the battery cell assembly is higher, and the temperature control effect of the refrigerant heat exchange component on each battery cell in the middle of the battery device is poorer. The temperature distribution of the battery cells at different positions in the battery device is uneven and has a large difference.

[0081] Based on the above considerations, in order to alleviate the problem of uneven temperature distribution of battery cells at different positions in the battery device, the battery device provided by the embodiments of the present application comprises a battery cell assembly and a refrigerant heat exchange component, and the arrangement density of the branch flow channels in the first sub heat exchange flow channel of the refrigerant heat exchange component is greater than the arrangement density of the branch flow channels in the second sub heat exchange flow channel.

[0082] In such a battery cell, the refrigerant heat exchange component can more efficiently exchange heat with the part of the battery cell assembly with a faster temperature change rate through the first sub heat exchange flow channel, thereby improving the heat exchange capacity of the refrigerant heat exchange component in the corresponding part of the first zone of the battery cell assembly, so as to make the temperature of different parts of the battery cell assembly more uniform, improve the temperature uniformity of the battery cell assembly, and also improve the temperature uniformity of the refrigerant heat exchange component.

[0083] The following embodiments take a vehicle 1000 as an example for convenience of description.

[0084] Reference Figure 1 , Figure 1 A structural schematic diagram of the vehicle 1000 provided by some embodiments of the present application is shown. The vehicle 1000 can be a fuel automobile, a gas automobile or a new energy automobile, and the new energy automobile can be a pure electric automobile, a hybrid automobile or a range extended automobile, etc. The vehicle 1000 is internally provided with a battery, which can be arranged at the bottom, the head or the tail of the vehicle 1000. The battery can be used for power supply of the vehicle 1000, for example, the battery can be used as an operating power source of the vehicle 1000. The vehicle 1000 can further comprise a controller 300 and a motor 200, and the controller 300 is used to control the battery to supply power to the motor 200, for example, to meet the power demand of the vehicle 1000 during starting, navigation and driving.

[0085] In some embodiments of the present application, the battery 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.

[0086] Reference Figure 2 ,Figure 2 An exploded view of a battery apparatus 100 is provided for some embodiments of the present application.

[0087] The battery apparatus 100 (Battery Apparatus) referred to in embodiments of the present application can include one or more battery cell assemblies 20 for providing voltage and capacity. The battery cell assembly 20 (Battery Cell Assembly) can include a plurality of battery cells 21 connected in series, in parallel, or in a mixed connection through a busbar component.

[0088] In some embodiments, the battery cell assembly 20 (Battery Cell Assembly) is generally formed by arranging a plurality of battery cells 21.

[0089] As an example, the battery cell assembly 20 can be a battery module formed by arranging and fixing a plurality of battery cells 21 into a single independent module. As an example, the battery module can be formed by bundling a plurality of battery cells 21 with a cable tie.

[0090] In some embodiments, the battery apparatus 100 can be a battery pack including a case 10 and one or more battery cell assemblies 20 received in the case 10.

[0091] As an example, the battery cell assembly 20 can be a battery module, and the battery cell assembly 20 can be received in the case 10 by fixing the battery module in the case 10.

[0092] As an example, the battery cell assembly 20 can also be received in the case 10 by directly fixing a plurality of battery cells 21 in the case 10.

[0093] As an example, the case 10 can include a first case and a second case. The first case and the second case are coupled so that an enclosed space is formed inside the case 10 to receive the battery cell assembly 20. The enclosed here means covered or closed, which can be sealed or unsealed. The first case can be the top cover 11 or the bottom plate 13.

[0094] As an example, the case 10 can include a top cover 11, a frame 12, and a bottom plate 13. The top cover 11 and the bottom plate 13 are respectively connected with the frame 12 so that an enclosed space is formed inside the case 10 to receive the battery cell assembly 20.

[0095] In some embodiments, the case 10 can be part of a chassis structure of the vehicle 1000. For example, portions of the case 10 can become at least part of a floor of the vehicle 1000, or portions of the case 10 can become at least part of cross members and longitudinal members of the vehicle 1000.

[0096] Reference Figure 3 , Figure 3 A schematic diagram of a disassembled structure of a battery cell 21 is provided for some embodiments of the present application. The battery cell 21 refers to the smallest unit that constitutes a battery. The battery cell 21 can be a secondary battery, which refers to a battery cell 21 that can be activated by charging after discharging the battery cell 21.

[0097] The battery cell 21 can be a lithium ion battery, a sodium ion battery, a sodium lithium ion battery, a lithium metal battery, a sodium metal battery, a lithium sulfur battery, a magnesium ion battery, a nickel-hydrogen battery, a nickel-cadmium battery, a lead-acid battery, etc., and the embodiments of the present application are not limited thereto.

[0098] As shown in the figure, the battery cell 21 includes an end cover 211, a shell 212, an electrode assembly 213, and other functional components.

[0099] The end cover 211 refers to a component that covers the opening of the shell 212 to isolate the internal environment of the battery cell 21 from the external environment. Without limitation, the shape of the end cover 211 can be adapted to the shape of the shell 212 to fit the shell 212. Alternatively, the end cover 211 can be made of a material with certain hardness and strength, such as aluminum alloy, so that the end cover 211 is not easily deformed when subjected to extrusion and collision, so that the battery cell 21 can have higher structural strength, and the safety performance can also be improved. The end cover 211 can be provided with functional components such as an electrode terminal 214. The electrode terminal 214 can be used to electrically connect with the electrode assembly 213 for outputting or inputting the electrical energy of the battery cell 21. In some embodiments, the end cover 211 can also be provided with a pressure relief mechanism for relieving the internal pressure of the battery cell 21 when the internal pressure or temperature of the battery cell 21 reaches a threshold value. The material of the end cover 211 can also be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the embodiments of the present application do not make special limitations thereon. In some embodiments, an insulating piece can also be provided on the inner side of the end cover 211, which can be used to isolate the electrical connection components in the shell 212 from the end cover 211 to reduce the risk of short circuit. For example, the insulating piece can be plastic, rubber, etc.

[0100] The shell 212 is a component for cooperating with the end cover 211 to form an internal environment of the battery cell 21, wherein the formed internal environment can be used to accommodate the electrode assembly 213, electrolyte and other components. The shell 212 and the end cover 211 can be independent components, and an opening can be provided on the shell 212, and the end cover 211 is used to cover the opening to form the internal environment of the battery cell 21. Without limitation, the end cover 211 and the shell 212 can also be integrated, specifically, the end cover 211 and the shell 212 can form a common connecting surface before other components enter the shell, and when it is necessary to seal the internal environment of the shell 212, the end cover 211 is used to cover the shell 212. The shell 212 can be various shapes and sizes, for example, cuboid, cylinder, hexagonal prism, etc. Specifically, the shape of the shell 212 can be determined according to the specific shape and size of the electrode assembly 213. The material of the shell 212 can be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the embodiments of the present application do not make special limitations.

[0101] The electrode assembly 213 is a component in which electrochemical reactions occur in the battery cell 21. One or more electrode assemblies 213 can be contained in the shell 212. The electrode assembly 213 is mainly formed by winding or stacking the positive electrode sheet and the negative electrode sheet, and a separator is usually provided between the positive electrode sheet and the negative electrode sheet. The positive electrode sheet and the negative electrode sheet have a portion of active material constituting the main body of the electrode assembly 213, and a portion of the positive electrode sheet and the negative electrode sheet without active material each constitutes a tab. The positive tab and the negative tab can be located at one end of the main body or at two ends of the main body, respectively. In the charging and discharging process of the battery, the positive active material and the negative active material react with the electrolyte, and the tabs are connected to the electrode terminal 214 to form a current loop.

[0102] In the first aspect, with reference to Figure 2 , Figures 4 to 6The battery device 100 provided by the embodiments of the present application comprises a battery cell assembly 20 and a refrigerant heat exchange component 30. The refrigerant heat exchange component 30 has a heat exchange flow channel 31 inside, which is used for the circulation of a refrigerant heat exchange medium. The heat exchange flow channel 31 comprises at least two sub heat exchange flow channels 311 arranged in a first direction in sequence. Each sub heat exchange flow channel 311 comprises at least two sub flow channels 3111 which are in communication with each other. The sub flow channels 3111 are arranged in intervals. Each sub heat exchange flow channel 311 comprises a first sub heat exchange flow channel 311a and at least one second sub heat exchange flow channel 311b. Each second sub heat exchange flow channel 311b is arranged on one side or opposite sides of the first sub heat exchange flow channel 311a. The refrigerant heat exchange component 30 further comprises a heat exchange surface 32 corresponding to the heat exchange flow channel 31. The first direction is parallel to the heat exchange surface 32. The heat exchange surface 32 is arranged close to or in contact with the battery cell assembly 20. The heat exchange surface 32 has a first area 321 and a second area 322. The first area 321 corresponds to the first sub heat exchange flow channel 311a, and the second area 322 corresponds to the second sub heat exchange flow channel 311b. The arrangement density of each sub flow channel 3111 in the first sub heat exchange flow channel 311a in the first area 321 is greater than the arrangement density of each sub flow channel 3111 in the second sub heat exchange flow channel 311b in the second area 322.

[0103] In the figure, the direction of the X axis is the width direction of the battery device 100, and the direction of the Y axis is the length direction Y of the battery device 100.

[0104] The battery cell assembly 20 refers to a structure formed by arranging a plurality of battery cells 21. The plurality of battery cells 21 can be arranged in one direction to form a battery cell assembly 20. A plurality of battery cell assemblies 20 can also be arranged in different directions to form a battery cell assembly 20.

[0105] The battery cell 21 refers to the smallest unit of the battery device 100. The battery cell 21 can have a cylindrical structure, a prismatic structure, a sheet structure or other shapes. The number of battery cells 21 can be one, two or more. When there are a plurality of battery cells 21, the plurality of battery cells 21 can be arranged in one or two different directions. The plurality of battery cells 21 can be connected in series, in parallel or in a mixed manner.

[0106] The refrigerant heat exchange component 30 is a structure for heat exchange with the battery monomer 21 in the battery device 100, and the number of refrigerant heat exchange components 30 can be one, two or more; in the case of multiple battery monomers 21, the number of refrigerant heat exchange components 30 can be one, and heat exchange with each battery monomer 21 is performed through the refrigerant heat exchange component 30 to control the temperature of each battery monomer 21; in the case of multiple battery monomers 21, the number of refrigerant heat exchange components 30 can also be two or more, at which time one refrigerant heat exchange component 30 can be heat exchanged with one or more battery monomers 21 in the same row or column.

[0107] The refrigerant heat exchange component 30 can be connected to the box body 10, and the refrigerant heat exchange component 30 can be fixedly connected to the box body 10 by welding, bonding or other means, or can be detachably connected to the box body 10 by clamping, screwing or other means; the refrigerant heat exchange component 30 can be directly connected to the box body 10, or indirectly connected to the box body 10 through an intermediate structure; the refrigerant heat exchange component 30 can be located inside the box body 10, or outside the box body 10; the refrigerant heat exchange component 30 can be located at the bottom or top of each battery monomer 21, or between adjacent two battery monomers 21; the material of the refrigerant heat exchange component 30 can include metal, plastic or other materials.

[0108] The heat exchange flow channel 31 refers to a structure in the refrigerant heat exchange component 30 for the flow of refrigerant; the heat exchange flow channel 31 can include a pipe structure, at which time the pipe structure can be serpentine, spiral or other shapes; the heat exchange flow channel 31 can also include a channel structure provided in a base piece, and the base piece refers to a structure in the refrigerant heat exchange component 30 for providing a mounting base for other structures; the base piece can be a plate structure, a block structure or other structures, and the shape of the base piece can be a rectangular plate, a prism, a cylinder or other shapes; the channel structure formed in the base piece can be a serpentine channel, a spiral channel or a channel of other shapes.

[0109] The substance flowing in the heat exchange flow channel 31 is refrigerant, which can be heat exchanged with the battery monomer 21 or other structures outside the refrigerant heat exchange component 30; the refrigerant can include liquid medium, gaseous medium, solid-liquid mixed medium, etc.; the refrigerant can include refrigerant, for example, the refrigerant can include tetrafluoroethane, difluoromethane, pentafluoroethane, etc.

[0110] The sub heat exchange channel 311 refers to a part of the heat exchange channel 31 for heat exchange with the battery monomer 21. The refrigerant can exchange heat with the battery monomer 21 in the sub heat exchange channel 311. The number of sub heat exchange channels 311 is at least two, that is, the number of sub heat exchange channels 311 can be two, or three or more; each sub heat exchange channel 311 can be directly connected to each other, or indirectly connected through other channel structures; each sub heat exchange channel 311 can be in parallel, or in series or mixed connection.

[0111] The at least two sub heat exchange channels 311 are arranged in sequence along the first direction, which can be the length direction Y of the battery device 100, or the width direction X of the battery device 100 or other direction; for example, the first direction is the width direction X of the battery device 100.

[0112] The sub flow channel 3111 refers to a part of the sub heat exchange channel 311. The refrigerant can flow in the sub flow channel 3111, and the refrigerant can exchange heat with the battery monomer 21 in the sub flow channel 3111. One sub heat exchange channel 311 includes at least two sub flow channels 3111, that is, one sub heat exchange channel 311 can include two sub flow channels 3111, or three or more sub flow channels 3111. Each sub flow channel 3111 of the same sub heat exchange channel 311 is connected to each other, so that the refrigerant can enter each sub flow channel 3111 of the same sub heat exchange channel 311. Each sub flow channel 3111 can be spaced apart along the first direction, or spaced apart along other directions.

[0113] The sub heat exchange channel 311 includes a first sub heat exchange channel 311a and a second sub heat exchange channel 311b. When the number of sub heat exchange channels 311 is two, the two sub heat exchange channels 311 can be respectively referred to as the first sub heat exchange channel 311a and the second sub heat exchange channel 311b. When the number of sub heat exchange channels 311 is three or more, each sub heat exchange channel 311 can include one first sub heat exchange channel 311a, one second sub heat exchange channel 311b and other channels, or two or more second sub heat exchange channels 311b.

[0114] Because the refrigerant can exchange heat with the battery monomer 21 in each sub heat exchange channel 311, when the sub heat exchange channel 311 includes the first sub heat exchange channel 311a and the second sub heat exchange channel 311b, the refrigerant can exchange heat with the battery monomer 21 at different positions of the battery monomer assembly 20 in the first sub heat exchange channel 311a and the second sub heat exchange channel 311b.

[0115] According to the number of the second sub heat exchange channels 311b, when the number of the second sub heat exchange channels 311b is one, the second sub heat exchange channel 311b is located on one side of the first sub heat exchange channel 311a; when the number of the second sub heat exchange channels 311b is two or more, the plurality of second sub heat exchange channels 311b can be respectively located on the opposite sides of the first sub heat exchange channel 311a.

[0116] The heat exchange surface 32 refers to the surface of the refrigerant heat exchange component 30 corresponding to the heat exchange channel 31. According to the position and connection relationship between the refrigerant heat exchange component 30 and the battery monomer assembly 20, the heat exchange surface 32 can be close to the battery monomer assembly 20, and the heat exchange surface 32 can also be directly in contact with the battery monomer assembly 20, at this time, the refrigerant can exchange heat with the battery monomer 21 at the heat exchange surface 32; in the case that the heat exchange channel 31 is formed in the base piece, the heat exchange surface 32 is the surface of the base piece facing the battery monomer assembly 20.

[0117] The first area 321 refers to a part of the heat exchange surface 32, and the first area 321 corresponds to the first sub heat exchange channel 311a, that is, the first sub heat exchange channel 311a can exchange heat with the battery monomer assembly 20 at the first area 321, that is, the part of the battery monomer 21 in the battery monomer assembly 20 corresponding to the first area 321 can exchange heat with the first sub heat exchange channel 311a; the first area 321 can be a region set on the heat exchange surface 32, or a region surrounded on the heat exchange surface 32 by structure; the shape of the first area 321 can be square, circular or other shapes.

[0118] Similar to the first area 321, the second area 322 corresponds to the second sub heat exchange channel 311b, that is, the second sub heat exchange channel 311b can exchange heat with the battery monomer assembly 20 at the second area 322, that is, the part of the battery monomer 21 in the battery monomer assembly 20 corresponding to the second area 322 can exchange heat with the second sub heat exchange channel 311b; the second area 322 can be a region set on the heat exchange surface 32, or a region surrounded on the heat exchange surface 32 by structure; the shape of the second area 322 can be square, circular or other shapes.

[0119] The arrangement density of each sub-flow channel 3111 in the first sub heat exchange channel 311a within the first area 321 reflects the heat exchange performance of the first sub heat exchange channel 311a, the greater the arrangement density, the greater the amount of refrigerant in the first sub heat exchange channel 311a per unit time, and the stronger the heat exchange capacity of the first sub heat exchange channel 311a; the arrangement density is directly proportional to the number of each sub-flow channel 3111 in the first sub heat exchange channel 311a in a unit space.

[0120] The arrangement density of each branch flow channel 3111 in the second sub heat exchange flow channel 311b within the second area 322 reflects the heat exchange performance of the second sub heat exchange flow channel 311b, the greater the arrangement density, the greater the amount of refrigerant in the second sub heat exchange flow channel 311b per unit time, and the stronger the heat exchange capacity of the second sub heat exchange flow channel 311b; the arrangement density is directly proportional to the number of each branch flow channel 3111 in the second sub heat exchange flow channel 311b in a unit space.

[0121] The arrangement density of each branch flow channel 3111 in the first sub heat exchange flow channel 311a within the first area 321 is greater than the arrangement density of each branch flow channel 3111 in the second sub heat exchange flow channel 311b within the second area 322, that is, the heat exchange performance of the refrigerant heat exchange component 30 at the first area 321 is stronger than the heat exchange performance at the second area 322; in the case that the refrigerant heat exchange component 30 is used to cool the battery monomer assembly 20, the heat dissipation performance of the refrigerant heat exchange component 30 at the first area 321 is stronger than the heat dissipation performance at the second area 322.

[0122] In the battery monomer assembly 20, for the battery monomer 21 located in the middle of the battery monomer assembly 20, there are battery monomers 21 around the battery monomer, making it difficult for the heat of the battery monomer to dissipate to the environment, and part of the heat of the battery monomers 21 around the battery monomer 21 will also be conducted to the battery monomer 21, causing the temperature of the battery monomer 21 to rise faster and be higher; during the operation of the battery monomer assembly 20, the heat dissipation performance of the battery monomer 21 located in the middle of the battery monomer assembly 20 is weaker than that of the battery monomer 21 located at the edge of the battery monomer assembly 20, and the temperature of the battery monomer 21 located in the middle of the battery monomer assembly 20 is higher than that of the battery monomer 21 located at the edge of the battery monomer assembly 20; that is, during the operation of the battery monomer assembly 20, the temperature rise speed and temperature of different positions of the battery monomer assembly 20 are different, which easily leads to at least part of the battery monomers 21 in the battery monomer assembly 20 to be difficult to work at an appropriate temperature, thereby easily causing a negative impact on the efficiency of the entire battery device 100.

[0123] At this time, the middle part of the battery cell assembly 20 can correspond to the first area 321, so that the first sub heat exchange flow channel 311a with high heat exchange efficiency exchanges heat with the middle part of the battery cell assembly 20, and the second sub heat exchange flow channel 311b exchanges heat with other positions of the battery cell assembly 20. Since the heat exchange efficiency of the first sub heat exchange flow channel 311a is higher than that of the second sub heat exchange flow channel 311b, during the operation of the refrigerant heat exchange component 30, the first sub heat exchange flow channel 311a can make the cooling speed of the corresponding battery cell 21 faster than that of the battery cell 21 corresponding to the second sub heat exchange flow channel 311b, so as to make the temperature regions of different positions of the battery cell assembly 20 consistent, and thus improve the temperature uniformity of the battery cell assembly 20 during operation, and improve the temperature uniformity of the refrigerant heat exchange component 30.

[0124] In the embodiment, the heat exchange flow channel 31 includes the first sub heat exchange flow channel 311a and at least one second sub heat exchange flow channel 311b, and the arrangement density of the branch flow channels 3111 in the first sub heat exchange flow channel 311a in the first area 321 is greater than that of the branch flow channels 3111 in the second sub heat exchange flow channel 311b in the second area 322, which improves the heat exchange capacity of the refrigerant heat exchange component 30 on the part of the battery cell assembly 20 corresponding to the first area 321, so as to better exchange heat with the part of the battery cell assembly 20 with a faster temperature change speed, so as to make the temperature of different parts of the battery cell assembly 20 more uniform, and improve the temperature uniformity of the battery cell assembly 20.

[0125] In some embodiments, the ratio of the arrangement density of each branch flow channel 3111 in the first sub heat exchange flow channel 311a in the first area 321 to the arrangement density of each branch flow channel 3111 in the second sub heat exchange flow channel 311b in the second area 322 ranges from 1.5 to 4.

[0126] The arrangement density of each branch flow channel 3111 in the first sub heat exchange flow channel 311a in the first area 321 is the ratio of the sum of the projection areas of the branch flow channels 3111 in the first area 321 to the area of the first area 321; this arrangement density is referred to as the first arrangement density, and the first arrangement density reflects the heat exchange performance of the first sub heat exchange flow channel 311a in the first area 321.

[0127] The arrangement density of each branch flow channel 3111 in the second sub heat exchange flow channel 311b in the second area 322 is the ratio of the sum of the projection areas of the branch flow channels 3111 in the second area 322 to the area of the second area 322; this arrangement density is referred to as the second arrangement density, and the second arrangement density reflects the heat exchange performance of the second sub heat exchange flow channel 311b in the second area 322.

[0128] The ratio of the first arrangement density and the second arrangement density ranges from 1.5 to 4. For example, the ratio can be 1.5, 2, 2.5, 3, 3.5, 4, or other values.

[0129] The ratio of the first arrangement density and the second arrangement density can be set according to the temperature difference of different positions in the battery monomer assembly 20 corresponding to the first area 321 and the second area 322, so as to reduce the temperature difference of different positions in the battery monomer assembly 20, improve the temperature uniformity of the battery monomer assembly 20, and improve the temperature uniformity of the refrigerant heat exchange component 30.

[0130] The ratio of the arrangement density of the first sub-heat exchange flow channel 311a and the arrangement density of the second sub-heat exchange flow channel 311b in some embodiments of the present embodiment ranges from 1.5 to 4, so that the first sub-heat exchange flow channel 311a can have better heat exchange capacity at the first area 321, so that the refrigerant heat exchange component 30 can have more efficient heat exchange for the part of the battery monomer assembly 20 with rapid temperature change, thereby improving the temperature uniformity of the battery monomer assembly 20.

[0131] Reference Figure 6 , Figure 8 , Figure 9 In some embodiments, each sub-flow channel 3111 in the first sub-heat exchange flow channel 311a is arranged at a first interval, and each sub-flow channel 3111 in the second sub-heat exchange flow channel 311b is arranged at a second interval, and the first interval is smaller than the second interval.

[0132] Each sub-flow channel 3111 in the first sub-heat exchange flow channel 311a is arranged at a first interval, wherein the first interval refers to the interval between two adjacent sub-flow channels 3111 in the first sub-heat exchange flow channel 311a; referring to Figure 8 , the size shown as L1 in the figure is the first interval, and the first interval is negatively related to the arrangement density of each sub-flow channel 3111 in the first sub-heat exchange flow channel 311a within the first area 321. The smaller the first interval, the greater the arrangement density of each sub-flow channel 3111 in the first sub-heat exchange flow channel 311a within the first area 321.

[0133] Each sub-flow channel 3111 in the second sub-heat exchange flow channel 311b is arranged at a second interval, wherein the second interval refers to the interval between two adjacent sub-flow channels 3111 in the second sub-heat exchange flow channel 311b; referring to Figure 9 , the size shown as L2 in the figure is the second interval, and the second interval is negatively related to the arrangement density of each sub-flow channel 3111 in the second sub-heat exchange flow channel 311b within the second area 322. The greater the second interval, the smaller the arrangement density of each sub-flow channel 3111 in the second sub-heat exchange flow channel 311b within the second area 322.

[0134] The first interval is less than the second interval, so that the arrangement density of each sub-flow channel 3111 in the first sub-heat exchange flow channel 311a in the first area 321 is greater than the arrangement density of each sub-flow channel 3111 in the second sub-heat exchange flow channel 311b in the second area 322.

[0135] In the embodiment, the interval of each sub-flow channel 3111 in the first sub-heat exchange flow channel 311a is less than the interval of each sub-flow channel 3111 in the second sub-heat exchange flow channel 311b, so that the arrangement density of each sub-flow channel 3111 in the first sub-heat exchange flow channel 311a in the first area 321 is greater than the arrangement density of each sub-flow channel 3111 in the second sub-heat exchange flow channel 311b in the second area 322, so that the refrigerant heat exchange component 30 can more efficiently exchange heat with the part of the battery monomer assembly 20 that changes temperature faster, thereby improving the temperature uniformity of the battery monomer assembly 20.

[0136] Reference Figure 6 , Figure 8 In some embodiments, the first interval ranges from 2 mm to 7 mm.

[0137] The first interval ranges from 2 mm to 7 mm, that is, Figure 8 The size of LI in the embodiment ranges from 2 mm to 7 mm. For example, the size of the first interval can be 2 mm, 3 mm, 4 mm, 5 mm, 6 mm, 7 mm, or other values.

[0138] For example, the first interval can be 2 mm, in which case the interval between each sub-flow channel 3111 in the first sub-heat exchange flow channel 311a is small, the arrangement density of each sub-flow channel 3111 in the first sub-heat exchange flow channel 311a in the first area 321 is high, and the heat exchange efficiency of the first sub-heat exchange flow channel 311a is high.

[0139] For example, the first interval can be 4.5 mm, in which case the interval between each sub-flow channel 3111 in the first sub-heat exchange flow channel 311a is moderate, the heat exchange efficiency of the first sub-heat exchange flow channel 311a is high, and the processing difficulty of each sub-flow channel 3111 in the first sub-heat exchange flow channel 311a is low.

[0140] For example, the first interval can be 7 mm, in which case the interval between each sub-flow channel 3111 in the first sub-heat exchange flow channel 311a is large, and the processing difficulty of each sub-flow channel 3111 in the first sub-heat exchange flow channel 311a is lower.

[0141] The embodiment provides a range of some first intervals, so that the interval of each sub-flow channel 3111 in the first sub-heat exchange flow channel 311a is small, so that the arrangement density of each sub-flow channel 3111 in the first sub-heat exchange flow channel 311a in the first area 321 can be larger and have higher heat exchange efficiency.

[0142] Reference Figure 6 , Figure 9 In some embodiments, the second spacing ranges from 20 mm to 30 mm.

[0143] The second spacing ranges from 20 mm to 30 mm, that is, Figure 9 The size of the second spacing L2 ranges from 20 mm to 30 mm; for example, the second spacing can be 20 mm, 22 mm, 24 mm, 26 mm, 28 mm, 30 mm, or other values.

[0144] For example, the second spacing can be 20 mm, in which case the spacing between each branch flow channel 3111 in the second sub heat exchange flow channel 311b is smaller, the arrangement density of each branch flow channel 3111 in the second sub heat exchange flow channel 311b in the second area 322 is higher, and the heat exchange efficiency of the second sub heat exchange flow channel 311b is higher.

[0145] For example, the second spacing can be 25 mm, in which case the spacing between each branch flow channel 3111 in the second sub heat exchange flow channel 311b is moderate, the heat exchange efficiency of the second sub heat exchange flow channel 311b is higher, and the processing difficulty of each branch flow channel 3111 in the second sub heat exchange flow channel 311b is lower.

[0146] For example, the second spacing can be 30 mm, in which case the spacing between each branch flow channel 3111 in the second sub heat exchange flow channel 311b is larger, and the processing difficulty of each branch flow channel 3111 in the second sub heat exchange flow channel 311b is lower.

[0147] The embodiments provide a range of second spacing, so that the spacing between each branch flow channel 3111 in the second sub heat exchange flow channel 311b can be greater than the spacing between each branch flow channel 3111 in the first sub heat exchange flow channel 311a, so that the arrangement density of each branch flow channel 3111 in the first sub heat exchange flow channel 311a in the first area 321 can be greater than the arrangement density of each branch flow channel 3111 in the second sub heat exchange flow channel 311b in the second area 322.

[0148] In some embodiments, the width of the branch flow channel 3111 ranges from 5 mm to 12 mm.

[0149] The width of the branch flow channel 3111 refers to the size of the branch flow channel 3111 in the direction perpendicular to the flow direction of the refrigerant, and the width of the branch flow channel 3111 ranges from 5 mm to 12 mm; for example, the width of the branch flow channel 3111 can be 5 mm, 6 mm, 7 mm, 8 mm, 9 mm, 10 mm, 11 mm, 12 mm, or other values.

[0150] The width of the flow distribution channel 3111 is related to the flow rate and flow resistance of the refrigerant in the flow distribution channel 3111. The greater the width of the flow distribution channel 3111, the lower the flow rate of the refrigerant, the greater the flow resistance, and the greater the pressure loss. At the same time, the width of the flow distribution channel 3111 is also related to the processing difficulty. The smaller the width of the flow distribution channel 3111, the greater the processing difficulty.

[0151] For example, the width of the flow distribution channel 3111 can be 5 mm. At this time, the width of the flow distribution channel 3111 is small, the flow resistance of the refrigerant in the flow distribution channel 3111 is small, the pressure loss is small, and the heat exchange performance of the refrigerant in the flow distribution channel 3111 is better.

[0152] For example, the width of the flow distribution channel 3111 can be 8.5 mm. At this time, the width of the flow distribution channel 3111 is moderate, and the heat exchange performance of the refrigerant in the flow distribution channel 3111 is better.

[0153] For example, the width of the flow distribution channel 3111 can be 12 mm. At this time, the width of the flow distribution channel 3111 is large, and the processing difficulty is low.

[0154] The present embodiment provides a range of widths of the flow distribution channel 3111, so that the single flow distribution channel 3111 and the battery monomer 21 can have a certain heat exchange area, thereby facilitating heat exchange between the flow distribution channel 3111 and the battery monomer 21.

[0155] Reference Figure 6 In some embodiments, the sub-heat exchange flow channel 311 further includes a third sub-heat exchange flow channel 311, which is arranged on the side of the second sub-heat exchange flow channel 311b away from the first sub-heat exchange flow channel 311a along the first direction. The heat exchange surface 32 further has a third region corresponding to the third sub-heat exchange flow channel 311. The arrangement density of each flow distribution channel 3111 in the second region 322 in the second sub-heat exchange flow channel 311b is greater than the arrangement density of each flow distribution channel 3111 in the third region in the third sub-heat exchange flow channel 311.

[0156] Since there are at least two sub-heat exchange flow channels 311, when the number of sub-heat exchange flow channels 311 is three or more, the sub-heat exchange flow channels 311 can include a first sub-heat exchange flow channel 311a and a second sub-heat exchange flow channel 311b. The sub-heat exchange flow channels 311 can further include a third sub-heat exchange flow channel 311. According to the number of sub-heat exchange flow channels 311, the number of third sub-heat exchange flow channels 311 can be one, two, or three. The refrigerant in the third sub-heat exchange flow channel 311 can exchange heat with the adjacent battery monomer 21.

[0157] The third sub-heat exchange flow channel 311 is arranged on the side of the second sub-heat exchange flow channel 311b away from the first sub-heat exchange flow channel 311a. In the case where the second sub-heat exchange flow channel 311b is located on the side of the first sub-heat exchange flow channel 311a, the third sub-heat exchange flow channel 311 is located on the same side of the first sub-heat exchange flow channel 311a as the second sub-heat exchange flow channel 311b, and the second sub-heat exchange flow channel 311b and the third sub-heat exchange flow channel 311 are arranged in a direction away from the first sub-heat exchange flow channel 311a. On the same side of the first sub-heat exchange flow channel 311a, the number of second sub-heat exchange flow channels 311b can be one, two or more. Similarly, the number of third sub-heat exchange flow channels 311 can also be one, two or more.

[0158] The third region refers to a partial region on the heat exchange surface 32, and the third region corresponds to the third sub-heat exchange flow channel 311, that is, the third sub-heat exchange flow channel 311 can perform heat exchange with the battery monomer assembly 20 at the third region, that is, the part of the battery monomer 21 corresponding to the third region in the battery monomer assembly 20 can perform heat exchange with the third sub-heat exchange flow channel 311. The third region can be a region set on the heat exchange surface 32, or a region enclosed on the heat exchange surface 32 by a structure. The shape of the third region can be square, circular or other shapes.

[0159] The arrangement density of each sub-flow channel 3111 in the third sub-heat exchange flow channel 311 in the third region reflects the heat exchange performance of the third sub-heat exchange flow channel 311. The greater the arrangement density, the greater the amount of refrigerant in the third sub-heat exchange flow channel 311 per unit time, and the stronger the heat exchange capacity of the third sub-heat exchange flow channel 311. The arrangement density is directly proportional to the number of each sub-flow channel 3111 in the third sub-heat exchange flow channel 311 in a unit space.

[0160] The arrangement density of each sub-flow channel 3111 in the second sub-heat exchange flow channel 311b in the second region 322 is greater than the arrangement density of each sub-flow channel 3111 in the third sub-heat exchange flow channel 311 in the third region. That is, the heat exchange performance of the refrigerant heat exchange component 30 at the second region 322 is stronger than the heat exchange performance at the third region. In the case where the refrigerant heat exchange component 30 is used to dissipate heat and cool the battery monomer assembly 20, the heat dissipation performance of the refrigerant heat exchange component 30 at the second region 322 is stronger than the heat dissipation performance at the third region.

[0161] The arrangement density of the first sub heat exchange flow channel 311a in the first area 321 is greater than the arrangement density of the second sub heat exchange flow channel 311b in the second area 322, and the arrangement density of the first sub heat exchange flow channel 311a in the first area 321 is also greater than the arrangement density of each sub flow channel 3111 in the third area of the third sub heat exchange flow channel 311, that is, the heat dissipation performance of the refrigerant heat exchange component 30 at the first area 321 is stronger than the heat dissipation performance at the third area, that is, the heat exchange performance of the refrigerant heat exchange component 30 at the first area 321, the second area 322 and the third area gradually decreases.

[0162] The first area 321, the second area 322 and the third area correspond to different positions of the battery monomer assembly 20 respectively, and the first sub heat exchange flow channel 311a, the second sub heat exchange flow channel 311b and the third sub heat exchange flow channel 311 can respectively perform targeted heat exchange for different positions of the battery monomer assembly 20, thereby improving the heat exchange efficiency and uniform temperature performance of the refrigerant heat exchange component 30.

[0163] It can be understood that, in addition to the third sub heat exchange flow channel 311, the sub heat exchange flow channel 311 can also include a fourth sub heat exchange flow channel 311, a fifth sub heat exchange flow channel 311 and the like with decreasing arrangement density, and in a direction away from the first sub heat exchange flow channel 311a, this arrangement can form a sub flow channel arrangement structure with gradually decreasing heat exchange performance to adapt to the temperature arrangement rule in the battery monomer assembly 20.

[0164] In the embodiment, the third sub heat exchange flow channel 311 is arranged on the side of the second sub heat exchange flow channel 311b away from the first sub heat exchange flow channel 311a, and the arrangement density of the sub flow channel 3111 in the third sub heat exchange flow channel 311 is less than the arrangement density of the sub flow channel 3111 in the second sub heat exchange flow channel 311b, so as to form a flow channel structure with different arrangement densities at different positions of the refrigerant heat exchange component 30; because different positions of the battery monomer assembly 20 usually have different temperature change speeds, this arrangement enables the refrigerant heat exchange component 30 to perform heat exchange at different heat exchange efficiencies for different positions of the battery monomer assembly 20, thereby reducing the temperature difference of different positions of the battery monomer assembly 20 and improving the temperature uniformity of the battery monomer assembly 20.

[0165] Reference Figure 6 In some embodiments, in the first direction, the first sub heat exchange flow channel 311a is located in the middle of the refrigerant heat exchange component 30, and each second sub heat exchange flow channel 311b is arranged on both sides of the first sub heat exchange flow channel 311a along the first direction.

[0166] The first sub heat exchange flow channel 311a is located in the middle of the refrigerant heat exchange component 30, and the first sub heat exchange flow channel 311a corresponds to the middle of the battery monomer assembly 20.

[0167] During the operation of the battery monomer assembly 20, the temperature change speed of the middle of the battery monomer assembly 20 is usually fast, and the temperature of the middle of the battery monomer assembly 20 is usually high. The heat exchange efficiency of the first sub heat exchange flow channel 311a is higher than that of the second sub heat exchange flow channel 311b. Therefore, the first sub heat exchange flow channel 311a corresponds to the middle of the battery monomer assembly 20, so as to better control the temperature of the middle of the battery monomer assembly 20.

[0168] The second sub heat exchange flow channel 311b is arranged on both sides of the first sub heat exchange flow channel 311a along the first direction, that is, at least one second sub heat exchange flow channel 311b is arranged on both sides of the first sub heat exchange flow channel 311a along the first direction. The number of the second sub heat exchange flow channels 311b on both sides of the first sub heat exchange flow channel 311a can be the same or different.

[0169] During the operation of the battery monomer assembly 20, the temperature change speed of the adjacent sides of the middle of the battery monomer assembly 20 is slower than that of the middle of the battery monomer assembly 20, and the heat exchange efficiency of the second sub heat exchange flow channel 311b is lower than that of the first sub heat exchange flow channel 311a. Therefore, the second sub heat exchange flow channel 311b is arranged on both sides of the first sub heat exchange flow channel 311a, so as to correspond to the positions of the adjacent sides of the middle of the battery monomer assembly 20.

[0170] In the embodiment, the heat dissipation performance of the battery monomer 21 in the middle of the battery monomer assembly 20 is usually poor, which causes the temperature change speed of the battery monomer 21 in the middle of the battery monomer assembly 20 to be usually fast. Therefore, the first sub heat exchange flow channel 311a is located in the middle of the refrigerant heat exchange component 30, so as to correspond to the middle of the battery monomer assembly 20, thereby enabling the first sub heat exchange flow channel 311a to more efficiently exchange heat with the middle of the battery monomer assembly 20. Meanwhile, the second sub heat exchange flow channel 311b corresponds to the part of the battery monomer assembly 20 with a relatively slow temperature change speed, so as to reduce the temperature difference of different positions of the battery monomer assembly 20, improve the temperature uniformity of the battery monomer assembly 20, and improve the uniform temperature performance of the refrigerant heat exchange component 30.

[0171] Reference Figure 6In some embodiments, each second sub-heat exchange channel 311b is symmetrically arranged on both sides of the first sub-heat exchange channel 311a in the first direction.

[0172] Each second sub-heat exchange channel 311b is symmetrically arranged on both sides of the first sub-heat exchange channel 311a, that is, the number of second sub-heat exchange channels 311b on both sides of the first sub-heat exchange channel 311a is the same, and the spacing between the symmetric second sub-heat exchange channels 311b on both sides of the first sub-heat exchange channel 311a and the first sub-heat exchange channel 311a is also the same.

[0173] Because the temperature distribution on the battery monomer assembly 20 is generally regular, each second sub-heat exchange channel 311b is symmetrically arranged on both sides of the first sub-heat exchange channel 311a, so that the arrangement of each sub-heat exchange channel 311 can adapt to the regularity of the temperature distribution on the battery monomer assembly 20, thereby improving the uniform temperature performance of the refrigerant heat exchange component 30.

[0174] In the present embodiment, the heat dissipation performance of the battery monomer assembly 20 gradually increases from the middle to both sides, that is, the temperature change rate of the battery monomer assembly 20 gradually slows down from the middle to both sides; accordingly, the second sub-heat exchange channel 311b is symmetrically arranged on both sides of the first sub-heat exchange channel 311a to adapt to the temperature change rate distribution of the battery monomer assembly 20.

[0175] Reference Figures 4 to 6 In some embodiments, the refrigerant heat exchange component 30 further comprises a joint 33, and the refrigerant heat exchange component 30 further has a transmission channel 34 inside, each sub-heat exchange channel 311 is connected to the joint 33 through the transmission channel 34; the refrigerant heat exchange medium enters the first sub-heat exchange channel 311a from the joint 33 through the transmission channel 34 along a first path, and the refrigerant heat exchange medium enters the second sub-heat exchange channel 311b from the joint 33 through the transmission channel 34 along a second path, and the length of the first path is less than the length of the second path.

[0176] The joint 33 refers to a structure in the refrigerant heat exchange component 30 connected to an external device, which can be a refrigerant storage device, a pressurizing device or other devices, and the refrigerant can enter the refrigerant heat exchange component 30 from the external device through the joint 33, and the refrigerant can also flow to the external device from the refrigerant heat exchange component 30 through the joint 33; in the case that the refrigerant heat exchange component 30 comprises a base piece, the joint 33 can be connected to the base piece by bonding, welding, screwing or other means; the joint 33 can be connected to the corresponding external device by inserting, screwing or other means; the material of the joint 33 can include metal, plastic or other materials.

[0177] The transmission flow channel 34 refers to a structure in the refrigerant heat exchange component 30 for the refrigerant to flow through; the transmission flow channel 34 can include a pipe structure, which can be serpentine, spiral or other shapes; the transmission flow channel 34 can also include a channel structure arranged in a base, which refers to a structure in the refrigerant heat exchange component 30 for providing a mounting base for other structures, and the base can be a plate structure, a block structure or other structures, and the base can be a rectangular plate, a prism, a cylinder or other shapes, and the channel structure formed in the base can be a serpentine channel, a spiral channel or other shapes.

[0178] The refrigerant can not exchange heat with the external environment or the battery monomer 21 during the flow in the transmission flow channel 34, and the transmission flow channel 34 is mainly used for transmitting the refrigerant; the refrigerant can also exchange heat with the adjacent battery monomer 21 during the flow in the transmission flow channel 34, and the transmission flow channel 34 can also be used to control the temperature of the battery monomer 21.

[0179] Each sub heat exchange flow channel 311 is connected to the joint 33 through the transmission flow channel 34, that is, the refrigerant can flow from the joint 33 to each sub heat exchange flow channel 311 through the transmission flow channel 34, and the refrigerant in each sub heat exchange flow channel 311 can also flow to the joint 33 through the transmission flow channel 34 to realize the input and output of the refrigerant.

[0180] The first path refers to a refrigerant flow path set in the transmission flow channel 34, and the refrigerant can flow in the transmission flow channel 34 along the first path to flow from the joint 33 to the first sub heat exchange flow channel 311a; the second path refers to a refrigerant flow path set in the transmission flow channel 34, and the refrigerant can flow in the transmission flow channel 34 along the second path to flow from the joint 33 to the second sub heat exchange flow channel 311b.

[0181] The length of the first path is less than the length of the second path, that is, the distance of the refrigerant flowing along the first path is less than the distance of the refrigerant flowing along the second path; under the same pressure, flow rate and other parameters, the time required for the refrigerant to enter the first sub heat exchange flow channel 311a from the joint 33 along the first path is less than the time required for the refrigerant to enter the second sub heat exchange flow channel 311b from the joint 33 along the second path.

[0182] During the operation of the refrigerant heat exchange component 30, the refrigerant enters the refrigerant heat exchange component 30 through the joint 33, and part of the refrigerant enters the first sub heat exchange flow channel 311a through the transmission flow channel 34 along the first path, and another part of the refrigerant enters the second sub heat exchange flow channel 311b through the transmission flow channel 34 along the second path; among them, the first sub heat exchange flow channel 311a contains refrigerant than the second sub heat exchange flow channel 311b, and the first sub heat exchange flow channel 311a exchanges heat with the corresponding battery monomer 21 before the second sub heat exchange flow channel 311b.

[0183] The temperature change speed of the part of the battery monomer assembly 20 corresponding to the first sub heat exchange flow channel 311a is faster, so that the first sub heat exchange flow channel 311a can better exchange heat with the corresponding battery monomer 21, and the heat exchange efficiency of the first sub heat exchange flow channel 311a can be further improved.

[0184] In the embodiment, the refrigerant enters the first sub heat exchange flow channel 311a and the second sub heat exchange flow channel 311b through the first path and the second path respectively, and the length of the first path is less than the length of the second path. In this case, the refrigerant can first enter the first sub heat exchange flow channel 311a and exchange heat with the corresponding part of the battery monomer assembly 20, so that the refrigerant heat exchange component 30 can first exchange heat with the part of the battery monomer assembly 20 with a faster temperature change speed, and the refrigerant heat exchange component 30 can provide different heat exchange efficiencies for different positions of the battery monomer assembly 20, thereby improving the temperature uniformity of the battery monomer assembly 20.

[0185] Reference Figures 4 to 6 In some embodiments, in the first direction, the joint 33 is located in the middle of the refrigerant heat exchange component 30.

[0186] In the case that the first sub heat exchange flow channel 311a is located in the middle of the refrigerant heat exchange component 30 in the first direction, the joint 33 is also located in the middle of the refrigerant heat exchange component 30 in the first direction, so as to further shorten the length of the first path, thereby further shortening the time required for the refrigerant to enter the first sub heat exchange flow channel 311a from the joint 33, and further improving the heat exchange efficiency of the first sub heat exchange flow channel 311a.

[0187] In the embodiment, the joint 33 is located in the middle of the refrigerant heat exchange component 30, so as to further shorten the length of the refrigerant from the joint 33 to the first sub heat exchange flow channel 311a, and make the refrigerant enter the first sub heat exchange flow channel 311a faster and exchange heat with the middle part of the battery monomer assembly 20 faster.

[0188] Reference Figure 6 , Figure 8 , Figure 9 In some embodiments, the flow distribution channel 3111 includes an inlet flow channel 31111 and a return flow channel 31112, and the inlet flow channel 31111 and the return flow channel 31112 are both connected with the transmission flow channel 34.

[0189] The inlet flow channel 31111 refers to a part of the channel structure in the branch flow channel 3111, and the refrigerant can flow in the inlet flow channel 31111. The inlet flow channel 31111 can be a through flow channel structure, or a structure formed by a plurality of channel structures connected in parallel. The return flow channel 31112 also refers to a part of the channel structure in the branch flow channel 3111, and the refrigerant can also flow in the return flow channel 31112. The return flow channel 31112 can be a through flow channel structure, or a structure formed by a plurality of channel structures connected in parallel. The inlet flow channel 31111 can be directly connected with the return flow channel 31112, or the inlet flow channel 31111 can be indirectly connected with the return flow channel 31112 through other channel structures.

[0190] The inlet flow channel 31111 and the return flow channel 31112 are both connected with the transmission flow channel 34, that is, the refrigerant can enter the inlet flow channel 31111 from the transmission flow channel 34, so that the refrigerant enters the corresponding branch flow channel 3111. The refrigerant can also enter the transmission flow channel 34 from the return flow channel 31112, so that the refrigerant is discharged from the corresponding branch flow channel 3111.

[0191] During the flow of the refrigerant in the inlet flow channel 31111 and the return flow channel 31112, the refrigerant can exchange heat with the adjacent battery cell 21.

[0192] In this embodiment, the inlet flow channel 31111 and the return flow channel 31112 of the branch flow channel 3111 are both connected with the transmission flow channel 34, so that the transmission flow channel 34 can supply the refrigerant to enter each branch flow channel 3111, and also can supply the refrigerant to flow out of each branch flow channel 3111.

[0193] Reference Figure 6 、 Figure 10 In some embodiments, the transmission flow channel 34 includes an inlet flow channel 341 and an outlet flow channel 342. The inlet flow channel 341 is connected with each inlet flow channel 31111, and the outlet flow channel 342 is connected with each return flow channel 31112. The inlet flow channel 341 and the outlet flow channel 342 are both connected with the joint 33, and the first path and the second path are both formed in the inlet flow channel 341.

[0194] The inlet flow channel 341 refers to a part of the channel structure in the transmission flow channel 34, and the refrigerant can flow in the inlet flow channel 341. One end of the inlet flow channel 341 is connected with the joint 33, and the other end of the inlet flow channel 341 is connected with the inlet flow channel 31111, so that the refrigerant can enter the connected inlet flow channel 31111 from the joint 33 through the inlet flow channel 341.

[0195] The first path and the second path are formed in the inlet flow channel 341, that is, the inlet flow channel 341 can correspond to the branch flow channel 3111 of the first sub heat exchange flow channel 311a or the branch flow channel 3111 of the second sub heat exchange flow channel 311b. Since the heat exchange flow channel 311 includes at least two branch flow channels 3111, the number of the inlet flow channel 341 can be one, in which case the inlet flow channel 341 can have multiple ends to communicate with the respective branch flow channels 3111. The number of the inlet flow channel 341 can also be multiple, in which case one inlet flow channel 341 can correspond to one sub heat exchange flow channel 311 or one branch flow channel 3111.

[0196] The outlet flow channel 342 refers to a part of the passage structure in the transmission flow channel 34, and the refrigerant can flow in the outlet flow channel 342. One end of the outlet flow channel 342 communicates with the joint 33, and the other end of the outlet flow channel 342 communicates with the loop flow channel 31112, so that the refrigerant can enter the joint 33 from the loop flow channel 31112 through the outlet flow channel 342.

[0197] Since the heat exchange flow channel 311 includes at least two branch flow channels 3111, the number of the outlet flow channel 342 can be one, in which case the outlet flow channel 342 can have multiple ends to communicate with the respective branch flow channels 3111. The number of the outlet flow channel 342 can also be multiple, in which case one outlet flow channel 342 can correspond to one sub heat exchange flow channel 311 or one branch flow channel 3111.

[0198] The embodiment provides specific structures of some transmission flow channels 34, so that the refrigerant can enter the respective branch flow channels 3111 through the inlet flow channel 341, and the refrigerant in the branch flow channels 3111 can be discharged to the outside of the refrigerant heat exchange component 30 through the outlet flow channel 342.

[0199] Reference Figure 6 、 Figure 10 In some embodiments, at least part of the inlet flow channel 341 is arranged adjacent to the outlet flow channel 342.

[0200] At least part of the inlet flow channel 341 is arranged adjacent to the outlet flow channel 342, that is, the inlet flow channel 341 can be completely arranged adjacent to the outlet flow channel 342, or only part of the inlet flow channel 341 can be arranged adjacent to the outlet flow channel 342. The part of the inlet flow channel 341 adjacent to the outlet flow channel 342 can exchange heat with the outlet flow channel 342 to reduce the temperature difference between the inlet flow channel 341 and the outlet flow channel 342.

[0201] After the refrigerant in each sub heat exchange flow channel 311 exchanges heat with the battery monomer assembly 20 and enters the outlet flow channel 342, the temperature maintaining capability of the refrigerant will decrease in the case of complete phase change of the refrigerant, and the temperature of the refrigerant will gradually change; for example, in the case of using the refrigerant to dissipate heat from the battery monomer assembly 20, the temperature of the refrigerant in the outlet flow channel 342 can be relatively high. Accordingly, at least part of the inlet flow channel 341 is arranged adjacent to the outlet flow channel 342, so that the inlet flow channel and the outlet flow channel 342 can exchange heat with each other, and the temperature of the outlet flow channel 342 is controlled through the inlet flow channel 341, thereby reducing the temperature difference between the inlet flow channel 341 and the outlet flow channel 342, and improving the temperature uniformity of the refrigerant heat exchange component 30.

[0202] In the embodiment, at least part of the inlet flow channel 341 is arranged adjacent to the outlet flow channel 342, so that the adjacent parts of the inlet flow channel 341 and the outlet flow channel 342 can exchange heat, so as to improve the temperature uniformity of the refrigerant heat exchange component 30.

[0203] Reference Figure 6 , Figure 8 , Figure 9 In some embodiments, the inlet flow channel 31111 is arranged adjacent to the return flow channel 31112.

[0204] The inlet flow channel 31111 is arranged adjacent to the return flow channel 31112, so that the inlet flow channel 31111 can exchange heat with the adjacent return flow channel 31112; it can be understood that the inlet flow channel 31111 and the return flow channel 31112 in the same sub flow channel 3111 can be arranged adjacent to each other, or the inlet flow channel 31111 and the return flow channel 31112 of two adjacent different sub flow channels 3111 can be arranged adjacent to each other.

[0205] During the process that the refrigerant enters the sub flow channel 3111 through the transmission flow channel 34, the refrigerant first enters the inlet flow channel 31111 and exchanges heat with the adjacent battery monomer 21, and then the refrigerant enters the return flow channel 31112 from the inlet flow channel 31111; during the process that the refrigerant enters the inlet flow channel 31111 and enters the return flow channel 31112 from the inlet flow channel 31111, the refrigerant is always in heat exchange with the adjacent battery monomer 21, that is, the temperature of the refrigerant in the return flow channel 31112 can be higher than the temperature of the refrigerant in the inlet flow channel 31111, thereby easily affecting the heat exchange performance of the refrigerant in the return flow channel 31112.

[0206] Accordingly, the inlet flow channel 31111 is arranged adjacent to the return flow channel 31112, so as to reduce the temperature difference between the refrigerant in the inlet flow channel 31111 and the refrigerant in the return flow channel, thereby improving the temperature uniformity of the refrigerant heat exchange component 30 and the temperature uniformity of the battery monomer assembly 20.

[0207] In the embodiment, the inlet flow channel 31111 is arranged adjacent to the loop flow channel 31112, so that the inlet flow channel 31111 and the adjacent loop flow channel 31112 can exchange heat, thereby further improving the temperature uniformity of the refrigerant heat exchange component 30.

[0208] Reference Figure 6 , Figure 8 , Figure 9 In some embodiments, in the same sub heat exchange flow channel 311, the loop flow channel 31112 and the inlet flow channel 31111 are arranged adjacent to each other.

[0209] In the same sub heat exchange flow channel 311, the loop flow channel 31112 and the inlet flow channel 31111 are arranged adjacent to each other, because one sub heat exchange flow channel 311 includes at least two sub flow channels 3111, that is, the inlet flow channel 31111 in any sub flow channel 3111 in the same sub heat exchange flow channel 311 is adjacent to the loop flow channel 31112 in the other adjacent sub flow channel 3111.

[0210] In this arrangement, the temperature difference of the refrigerant in the loop flow channel 31112 and the inlet flow channel 31111 of each sub flow channel 3111 in the same sub heat exchange flow channel 311 is small, thereby improving the temperature uniformity of the refrigerant heat exchange component 30.

[0211] The embodiment provides specific structures of some inlet flow channels 31111 arranged adjacent to loop flow channels 31112, so that the inlet flow channels 31111 and the loop flow channels 31112 in the same sub heat exchange flow channel 311 are arranged adjacent to each other, so that the inlet flow channels 31111 and the loop flow channels 31112 in the same sub heat exchange flow channel 311 can exchange heat, thereby improving the temperature uniformity of a single sub heat exchange flow channel 311.

[0212] In some embodiments, the inlet flow channel 31111 in one sub heat exchange flow channel 311 is arranged adjacent to the loop flow channel 31112 in the other adjacent sub heat exchange flow channel 311.

[0213] In the adjacent two sub heat exchange flow channels 311, the inlet flow channel 31111 dedicated to one sub heat exchange flow channel 311 is in communication with the loop flow channel 31112 in the other adjacent sub heat exchange flow channel 311; in this arrangement, the temperature difference of the refrigerant in the loop flow channel 31112 and the inlet flow channel 31111 of each sub flow channel 3111 in the adjacent two sub heat exchange flow channels 311 is small, thereby improving the temperature uniformity of the refrigerant heat exchange component 30; this arrangement can also make the heat exchange efficiency and temperature difference of each sub heat exchange flow channel 311 gradually change along the first direction, thereby adapting to the arrangement rule of the temperature change at different positions of the battery monomer assembly 20.

[0214] The embodiment provides a specific structure of the adjacent arrangement of the access flow channel 31111 and the return flow channel 31112, which can reduce the temperature difference between adjacent parts of the two sub-heat exchange flow channels 311, thereby further improving the temperature uniformity of the refrigerant heat exchange component 30.

[0215] Reference Figure 6 , Figure 10 In some embodiments, the outlet flow channel 342 includes a main outlet flow channel 3421 and a plurality of sub-outlet flow channels 3422 in communication with the main outlet flow channel 3421, the main outlet flow channel 3421 is in communication with the joint 33, the number of the sub-outlet flow channels 3422 is at least two, and each of the sub-outlet flow channels 3422 is in communication with each of the return flow channels 31112; each of the sub-outlet flow channels 3422 is arranged at the edge of the refrigerant heat exchange component 30.

[0216] The main outlet flow channel 3421 refers to part of the structure of the outlet flow channel 342, the main outlet flow channel 3421 is in communication with the joint 33, and the refrigerant can enter the joint 33 from the main outlet flow channel 3421 and be discharged out of the refrigerant heat exchange component 30; the number of the main outlet flow channel 3421 can be one, two or more.

[0217] The sub-outlet flow channel 3422 refers to part of the structure of the outlet flow channel 342, one end of the sub-outlet flow channel 3422 is in communication with the return flow channel 31112, and the other end is in communication with the main outlet flow channel 3421; the refrigerant in the access flow channel 3111 can enter the sub-outlet flow channel 3422 through the return flow channel 31112, enter the main outlet flow channel 3421 through the sub-outlet flow channel 3422, and finally be discharged out of the refrigerant heat exchange component 30 through the joint 33.

[0218] The number of the sub-outlet flow channels 3422 is at least two, that is, the number of the sub-outlet flow channels 3422 can be two, three or more; one sub-outlet flow channel 3422 can be in communication with only one return flow channel 31112, or can have multiple ends and be in communication with multiple different return flow channels 31112.

[0219] The sub-outlet flow channel 3422 is arranged at the edge of the refrigerant heat exchange component 30, because the sub-outlet flow channel 3422 is part of the outlet flow channel 342, and the temperature of the refrigerant in the outlet flow channel 342 usually changes at a relatively fast speed, and because the edge of the refrigerant heat exchange component 30 is close to the edge of the battery monomer assembly 20, the temperature change speed of the edge of the battery monomer assembly 20 is slow, so the sub-outlet flow channel 3422 is arranged at the edge of the refrigerant heat exchange component 30 to reduce the risk of accelerating the temperature change speed of the battery monomer assembly 20 caused by the sub-outlet flow channel 3422.

[0220] In some embodiments, the inlet flow channel 341 is adjacent to the main outlet flow channel 3421, which reduces the risk of the battery monomer assembly 20 being affected by the main outlet flow channel 3421.

[0221] In some embodiments, each sub-outlet flow channel 3422 is connected to a sub-return flow channel, and each sub-outlet flow channel 3422 is located at the edge of the refrigerant heat exchange component 30, so as to stagger the part of the refrigerant heat exchange component 30 with a faster temperature change rate and the part of the battery monomer assembly 20 with a faster temperature change rate, thereby reducing the negative impact of the refrigerant heat exchange component 30 on the temperature uniformity of the battery monomer assembly 20.

[0222] Reference Figure 6 、 Figure 7 、 Figure 10 In some embodiments, the heat exchange surface 32 includes an edge area 323 corresponding to at least part of each sub-outlet flow channel 3422, and the edge area 323 is arranged to be staggered with the battery monomer assembly 20.

[0223] The edge area 323 refers to a part of the heat exchange surface 32, and the edge area 323 corresponds to at least part of each sub-outlet flow channel 3422, that is, at least part of each sub-outlet flow channel 3422 can exchange heat with the external structure at the edge area 323. Since at least part of each sub-outlet flow channel 3422 is located at the edge of the refrigerant heat exchange component 30, the edge area 323 is also located at the edge of the heat exchange surface 32.

[0224] The edge area 323 can be a region set on the heat exchange surface 32, or a region enclosed on the heat exchange surface 32 by a structure. The shape of the edge area 323 can be square, circular, or other shapes. For example, the edge area 323 can be a long strip structure.

[0225] The edge area 323 is arranged to be staggered with the battery monomer assembly 20, that is, the battery monomer assembly 20 is difficult to cover the edge area 323. Accordingly, the edge area 323 can be directly exposed in the space inside the box 10, the refrigerant heat exchange component 30 can be connected to the box 10 at the edge area 323, and the refrigerant heat exchange component 30 can be connected to other structures with lower temperature requirements at the edge area 323.

[0226] Since the temperature of the refrigerant in each sub-outlet flow channel 3422 usually changes at a relatively fast rate, the edge area 323 is arranged to be staggered with the battery monomer assembly 20, so as to reduce the risk of the refrigerant in each sub-outlet flow channel 3422 directly exchanging heat with the battery monomer assembly 20, thereby reducing the negative impact of the refrigerant heat exchange component 30 on the temperature uniformity of the battery monomer assembly 20.

[0227] The edge region 323 corresponds to at least part of the sub-outlet flow passage 3422, that is, the edge region 323 can correspond to the entire sub-outlet flow passage 3422 or only a part of the sub-outlet flow passage 3422. For example, the sub-outlet flow passage 3422 communicates with the loop flow passage 31112, the loop flow passage 31112 corresponds to the battery cell assembly 20, and the refrigerant in the loop flow passage 31112 can exchange heat with the battery cell assembly 20. Therefore, a part of the sub-outlet flow passage 3422 can extend out of the edge region 323, and in this case, the edge region 323 corresponds to only a part of the sub-outlet flow passage 3422. For example, the sub-outlet flow passage 3422 communicates with the loop flow passage 31112, the loop flow passage 31112 corresponds to the battery cell assembly 20, and the refrigerant in the loop flow passage 31112 can exchange heat with the battery cell assembly 20. Therefore, a part of the loop flow passage 31112 can extend into the edge region 323, and in this case, the edge region 323 corresponds to the entire sub-outlet flow passage 3422.

[0228] It can be understood that, according to the extension mode of each loop flow passage 31112, each sub-outlet flow passage 3422 can be located at the edge of the refrigerant heat exchange component 30 only in the first direction, or in other directions, or in a ring shape around the circumference of the refrigerant heat exchange component 30. Correspondingly, the edge region 323 can be located at the edge of the heat exchange surface 32 only in the first direction, or in other directions, or in a ring shape around the circumference of the heat exchange surface 32.

[0229] In the embodiment, the sub-outlet flow passage 3422 is arranged to be staggered with the battery cell assembly 20, that is, the sub-outlet flow passage 3422 is difficult to exchange heat with the battery cell assembly 20, thereby further reducing the negative impact of the refrigerant heat exchange component 30 on the temperature uniformity of the battery cell assembly 20.

[0230] Reference Figure 6 、 Figure 7 、 Figure 10 In some embodiments, each sub-outlet flow passage 3422 includes a first flow passage section 34221 and a second flow passage section 34222 in communication with the first flow passage section 34221. The first flow passage section 34221 communicates with the main outlet flow passage 3421, and the second flow passage section 34222 communicates with the corresponding loop flow passage 31112. The first flow passage sections 34221 are arranged adjacent to each other, and the edge region 323 corresponds to at least each first flow passage section 34221.

[0231] The first flow passage section 34221 refers to a part of the structure of the sub-outlet flow passage 3422. The first flow passage section 34221 communicates with the main outlet flow passage 3421, and the refrigerant in the sub-outlet flow passage 3422 can enter the main outlet flow passage 3421 from the first flow passage section 34221.

[0232] The second flow passage section 34222 refers to a partial structure of the sub-outlet flow passage 3422, and the second flow passage section 34222 is in communication with the loop flow passage 31112, so that the refrigerant in the loop flow passage 31112 can enter the sub-outlet flow passage 3422 from the second flow passage section 34222. The sub-outlet flow passage 3422 can include one second flow passage section 34222, or two or more second flow passage sections 34222.

[0233] The first flow passage sections 34221 are arranged adjacently to reduce the space occupation of the first flow passage sections 34221. The first flow passage sections 34221 are located at the end of the flow path of the refrigerant in the refrigerant heat exchange component 30, and the temperature of the refrigerant in the first flow passage sections 34221 changes rapidly. Therefore, the first flow passage sections 34221 are arranged adjacently to reduce the space occupation of the first flow passage sections 34221.

[0234] The edge area 323 corresponds to at least the first flow passage sections 34221. The edge area 323 can correspond to only the first flow passage sections 34221, or can correspond to part of the second flow passage sections 34222, or can correspond to the second flow passage sections 34222 completely. Since the temperature of the refrigerant in the first flow passage sections 34221 changes rapidly, the edge area 323 corresponds to the first flow passage sections 34221, so that the refrigerant in the first flow passage sections 34221 is difficult to exchange heat directly with the battery monomer assembly 20, thereby reducing the risk of the temperature of the battery monomer assembly 20 changing rapidly due to the main outlet flow passage 3421, and further reducing the negative impact of the refrigerant heat exchange component 30 on the temperature uniformity of the battery monomer assembly 20.

[0235] The embodiments provide specific structures of some sub-outlet flow passages 3422, so that each flow passage can be in communication with each sub-outlet flow passage 3422. Meanwhile, the first flow passage sections 34221 are located at the edge of the refrigerant heat exchange component 30, so as to reduce the negative impact of the first flow passage sections 34221 on the temperature uniformity of the battery monomer assembly 20.

[0236] In some embodiments, the battery device 100 includes a box body 10, a battery monomer assembly 20, and a refrigerant heat exchange component 30.

[0237] The battery monomer assembly 20 and the refrigerant are contained in the box body 10. The battery monomer assembly 20 includes battery monomers 21 arranged in an array along the length direction Y and the width direction X of the battery device 100.

[0238] The refrigerant heat exchange component 30 includes a base member connected with the battery monomers 21. The base member is formed with a heat exchange flow passage 31, and the heat exchange flow passage 31 includes a plurality of sub-heat exchange flow passages 311.

[0239] The sub heat exchange flow channels 311 include a first sub heat exchange flow channel 311a and four second sub heat exchange flow channels 311b. The first sub heat exchange flow channel 311a is located in the middle of the base member in the width direction X of the battery device 100. The four second sub heat exchange flow channels 311b are symmetrically arranged on both sides of the first sub heat exchange flow channel 311a in the width direction X of the battery device 100.

[0240] The side of the base member facing the battery cell assembly 20 has a heat exchange surface 32. The heat exchange surface 32 has a first region 321 and a second region 322 arranged in the width direction X of the battery cell 21. The first region 321 corresponds to the first sub heat exchange flow channel 311a, and the second region 322 corresponds to the second sub heat exchange flow channel 311b. The arrangement density of the flow channels 3111 in the first sub heat exchange flow channel 311a in the first region 321 is greater than the arrangement density of the flow channels 3111 in the second sub heat exchange flow channel 311b in the second region 322. The battery cell assembly 20 corresponds to the first region 321 in the middle of the width direction X of the battery device 100.

[0241] Each sub heat exchange flow channel 311 includes at least one inlet flow channel 31111 and at least one return flow channel 31112. The refrigerant enters the sub heat exchange flow channel 311 from the inlet flow channel 31111 and is discharged from the sub heat exchange flow channel 311 to the outside through the return flow channel 31112. In the width direction X of the battery device 100, the inlet flow channels 31111 and the return flow channels 31112 are arranged alternately.

[0242] The refrigerant heat exchange component 30 further includes a connector 33 arranged on the base member.

[0243] The refrigerant heat exchange component 30 further includes a transmission flow channel 34 arranged in the base member. The transmission flow channel 34 includes an inlet flow channel 341 and an outlet flow channel 342. One end of the inlet flow channel 341 is connected to the connector 33, and the other end of the inlet flow channel 341 is connected to each sub heat exchange flow channel 311. Part of the refrigerant flows from the connector 33 to the first sub heat exchange flow channel 311a along a first path in the inlet flow channel 341, and another part of the refrigerant flows from the connector 33 to the second sub heat exchange flow channel 311b along a second path in the inlet flow channel 341. The length of the first path is less than the length of the second path.

[0244] The outlet flow channel 342 comprises a main outlet flow channel 3421 and a sub-outlet flow channel 3422, one end of the main outlet flow channel 3421 is in communication with the joint 33, and the other end of the main outlet flow channel 3421 is in communication with the sub-outlet flow channel 3422; the sub-outlet flow channel 3422 comprises a first flow channel section 34221 and a second flow channel section 34222, one end of the first flow channel section 34221 is in communication with the main outlet flow channel 3421, the other end of the first flow channel section 34221 is in communication with the second flow channel section 34222, one end of the second flow channel section 34222 is in communication with the first flow channel section 34221, and the other end of the second flow channel section 34222 is in communication with the loop flow channel 31112.

[0245] The first flow channel sections 34221 are arranged adjacent to each other and along the width direction X of the battery device 100 at two edges of the refrigerant heat exchange component 30, the heat exchange surface 32 is provided with an edge area 323 along the two edges of the width direction X of the battery device 100, the edge area 323 corresponds to the first flow channel section 34221, and the battery cell assembly 20 is arranged staggered to the edge area 323.

[0246] In a second aspect, the embodiments of the present application also provide a refrigerant heat exchange component 30, which has a heat exchange flow channel 31 inside, the heat exchange flow channel 31 is used for the circulation of a refrigerant heat exchange medium, the heat exchange flow channel 31 comprises at least two sub heat exchange flow channels 311 arranged in sequence along a first direction, each sub heat exchange flow channel 311 comprises at least two sub flow channels 3111 in communication with each other, and each sub flow channel 3111 is arranged in a staggered manner; each sub heat exchange flow channel 311 comprises a first sub heat exchange flow channel 311a and at least one second sub heat exchange flow channel 311b, each second sub heat exchange flow channel 311b is located on one side or opposite sides of the first sub heat exchange flow channel 311a; the refrigerant heat exchange component 30 further comprises a heat exchange surface 32 corresponding to the heat exchange flow channel 31, the first direction is parallel to the heat exchange surface 32, and the heat exchange surface 32 is arranged close to or in contact with the battery cell assembly 20; the heat exchange surface 32 has a first area 321 and a second area 322, the first area 321 corresponds to the first sub heat exchange flow channel 311a, and the second area 322 corresponds to the second sub heat exchange flow channel 311b, and the arrangement density of each sub flow channel 3111 in the first sub heat exchange flow channel 311a in the first area 321 is greater than the arrangement density of each sub flow channel 3111 in the second sub heat exchange flow channel 311b in the second area 322.

[0247] Similar to the refrigerant heat exchange component 30 in some embodiments of the first aspect, the present embodiment makes the heat exchange flow channel 31 include a first sub-heat exchange flow channel 311a and at least one second sub-heat exchange flow channel 311b, and makes the arrangement density of the branch flow channels 3111 in the first sub-heat exchange flow channel 311a in the first region 321 greater than the arrangement density of the branch flow channels 3111 in the second sub-heat exchange flow channel 311b in the second region 322, thereby improving the heat exchange capability of the refrigerant heat exchange component 30 in the part of the battery monomer assembly 20 corresponding to the first region 321, so as to better exchange heat with the part of the battery monomer assembly 20 having a faster temperature change speed, thereby making the temperature of different parts of the battery monomer assembly 20 more uniform, and improving the temperature uniformity of the battery monomer assembly 20.

[0248] In a third aspect, the embodiments of the present application further provide an energy storage device, which includes the battery device 100 provided in some embodiments of the first aspect, or the refrigerant heat exchange component 30 provided in some embodiments of the second aspect.

[0249] The energy storage device can include a plurality of battery devices 100, and the plurality of battery devices 100 can be connected in series through the busbar component to improve the voltage of the energy storage device. The plurality of battery devices 100 can also be connected in parallel to improve the capacity of the energy storage device.

[0250] The energy storage device can be used in a vehicle 1000, and can also be used in an energy storage power station, a wind power system, a solar power system, a mobile power system, or a temporary power supply system, etc.

[0251] In the energy storage device, the temperature distribution of the battery device 100 during the working process is relatively uniform, and the situation that some parts have excessively high temperature is less likely to occur. The temperature distribution in the battery device 100 is relatively uniform, and the battery monomer 21 in the battery device 100 can input or output relatively stably and efficiently at a suitable working temperature. At the same time, the situation that the battery device 100 is locally overheated can be reduced, and the service life of the battery device 100 can be improved, and the use risk of the battery device 100 can be reduced.

[0252] In a fourth aspect, the embodiments of the present application further provide a power consumption device, which includes the battery device 100 provided in some embodiments of the first aspect, or the refrigerant heat exchange component 30 provided in some embodiments of the second aspect, or the energy storage device provided in some embodiments of the third aspect.

[0253] In the electrical device, the temperature distribution of the battery device 100 during operation is relatively uniform, and the temperature of some parts is not prone to be too high. The temperature distribution of the battery device 100 is relatively uniform, and the battery monomer 21 in the battery device 100 can be relatively stable and efficient in input or output at a suitable working temperature. At the same time, the occurrence of local overheating of the battery device 100 can be reduced, and the service life of the battery device 100 can be improved, and the use risk of the battery device 100 can be reduced.

[0254] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should be covered in the scope of the claims and the specification of the present application. Especially, as long as there is no structural conflict, each technical feature mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, characterized by, The application relates to a battery cell assembly and a refrigerant heat exchange component. The refrigerant heat exchange component comprises a heat exchange flow channel for the flow of a refrigerant heat exchange medium, the heat exchange flow channel comprising at least two sub-flow channels arranged in sequence along a first direction, each of the sub-flow channels comprising at least two sub-flow passages in communication with each other, and the sub-flow passages being arranged at intervals. Each of the sub-flow channels comprises a first sub-flow channel and at least one second sub-flow channel, and each of the second sub-flow channels is arranged on one side or opposite sides of the first sub-flow channel. The refrigerant heat exchange component further comprises a heat exchange surface corresponding to the heat exchange flow channel, the first direction being parallel to the heat exchange surface, and the heat exchange surface being arranged close to or in contact with the battery cell assembly. The heat exchange surface comprises a first region corresponding to the first sub-flow channel and a second region corresponding to the second sub-flow channel, and the arrangement density of each of the sub-flow passages in the first sub-flow channel in the first region is greater than the arrangement density of each of the sub-flow passages in the second sub-flow channel in the second region. The ratio of the arrangement density of each of the sub-flow passages in the first sub-flow channel in the first region to the arrangement density of each of the sub-flow passages in the second sub-flow channel in the second region is in the range of 1.5 to 4.

2. The battery device according to claim 1, characterized by Each of the sub-flow passages in the first sub-flow channel is arranged at intervals with a first interval, and each of the sub-flow passages in the second sub-flow channel is arranged at intervals with a second interval, and the first interval is smaller than the second interval.

3. The battery device according to claim 1 or 2, characterized by The first interval is in the range of 2 mm to 7 mm.

4. The battery device of claim 3, wherein The second interval is in the range of 20 mm to 30 mm.

5. The battery device according to claim 3 or 4, characterized by The width of the sub-flow passage is in the range of 5 mm to 12 mm.

6. The battery device according to any one of claims 1 to 5, wherein The sub-flow channel further comprises a third sub-flow channel arranged on a side of the second sub-flow channel away from the first sub-flow channel along the first direction.

7. The battery device according to any one of claims 1 to 6, wherein The heat exchange surface further comprises a third region corresponding to the third sub-flow channel, and the arrangement density of each of the sub-flow passages in the second sub-flow channel in the second region is greater than the arrangement density of each of the sub-flow passages in the third sub-flow channel in the third region. In the first direction, the first sub-flow channel is arranged in the middle of the refrigerant heat exchange component, and each of the second sub-flow channels is arranged on both sides of the first sub-flow channel along the first direction.

8. The battery device according to any one of claims 1 to 7, characterized by, In the first direction, each of the second sub-flow channels is symmetrically arranged on both sides of the first sub-flow channel.

9. The battery device of claim 8, wherein, The refrigerant heat exchange component further comprises a joint, and the refrigerant heat exchange component further comprises a transmission flow channel, and each of the sub-flow channels is in communication with the joint through the transmission flow channel.

10. The battery device according to any one of claims 1-9, wherein, The refrigerant heat exchange medium enters the first sub-flow channel from the joint through the transmission flow channel along a first path, and the refrigerant heat exchange medium enters the second sub-flow channel from the joint through the transmission flow channel along a second path, and the length of the first path is smaller than the length of the second path. In the first direction, the joint is arranged in the middle of the refrigerant heat exchange component.

11. The battery device of claim 10, wherein, ​ 12. The battery device according to claim 10 or 11, characterized by The branch flow channels include inlet flow channels and return flow channels, and the inlet flow channels and the return flow channels are communicated with the transmission flow channel.

13. The battery device of claim 12, wherein, The transmission flow channel includes inlet flow channels and outlet flow channels, the inlet flow channels are communicated with the inlet flow channels, and the outlet flow channels are communicated with the return flow channels. The inlet flow channels and the outlet flow channels are communicated with the joint, and the first path and the second path are formed in the inlet flow channels.

14. The battery device of claim 13, wherein, At least part of the inlet flow channels is arranged adjacent to the outlet flow channels.

15. The battery device of any one of claims 12-14, wherein, The inlet flow channels are arranged adjacent to the return flow channels.

16. The battery device of claim 15, wherein, In the same sub heat exchange flow channel, the return flow channels and the inlet flow channels are arranged adjacent to each other.

17. The battery device according to claim 15 or 16, characterized by The inlet flow channels in one sub heat exchange flow channel are arranged adjacent to the return flow channels in another adjacent sub heat exchange flow channel.

18. The battery device according to claim 13 or 14, wherein The outlet flow channels include main outlet flow channels and sub outlet flow channels communicated with the main outlet flow channels, the main outlet flow channels are communicated with the joint, the number of the sub outlet flow channels is at least two, and each sub outlet flow channel is communicated with each return flow channel. Each sub outlet flow channel is arranged at the edge of the refrigerant heat exchange component.

19. The battery device of claim 18, wherein, The heat exchange surface includes an edge region corresponding to at least part of each sub outlet flow channel, and the edge region is arranged staggered to the battery monomer assembly.

20. The battery device of claim 19, wherein, Each sub outlet flow channel includes a first flow channel segment and a second flow channel segment communicated with the first flow channel segment, the first flow channel segment is communicated with the main outlet flow channel, and the second flow channel segment is communicated with the corresponding return flow channel. Each first flow channel segment is arranged adjacent to each other, and the edge region corresponds to at least each first flow channel segment.

21. A refrigerant heat exchange component, comprising: The refrigerant heat exchange component has a heat exchange flow channel inside for refrigerant heat exchange medium to flow, the heat exchange flow channel includes at least two sub heat exchange flow channels arranged in a first direction, each sub heat exchange flow channel includes at least two branch flow channels communicated with each other, and each branch flow channel is arranged spaced apart. Each sub heat exchange flow channel includes a first sub heat exchange flow channel and at least one second sub heat exchange flow channel, and each second sub heat exchange flow channel is located at one side or opposite sides of the first sub heat exchange flow channel. The refrigerant heat exchange component further includes a heat exchange surface corresponding to the heat exchange flow channel, and the first direction is parallel to the heat exchange surface. The heat exchange surface has a first region and a second region, the first region corresponds to the first sub heat exchange flow channel, the second region corresponds to the second sub heat exchange flow channel, and the arrangement density of each branch flow channel in the first sub heat exchange flow channel in the first region is greater than the arrangement density of each branch flow channel in the second sub heat exchange flow channel in the second region.

22. An energy storage device, comprising: The battery device includes the battery device as claimed in any one of claims 1-20, or the refrigerant heat exchange component as claimed in claim 21.

23. An electrical device, comprising: The battery device includes the battery device as claimed in any one of claims 1-20, or the refrigerant heat exchange component as claimed in claim 21, or the energy storage device as claimed in claim 22.

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