Battery device, refrigerant heat exchange device, and electric device

Abstract

The present application relates to the technical field of battery production, and provides a battery device, a refrigerant heat exchange device, and an electric device. The battery device comprises a battery cell module, a refrigerant heat exchange part and a connector assembly; the refrigerant heat exchange part has a heat exchange surface; the heat exchange surface is close to or in contact with a battery cell, and the heat exchange surface has an axis of symmetry; a heat exchange flow channel is provided inside the refrigerant heat exchange part, and the heat exchange flow channel is arranged symmetrically about the axis of symmetry; a flow channel inlet communicated with the heat exchange flow channel is formed on the heat exchange surface, and the flow channel inlet is configured to be symmetrical about the axis of symmetry. The connector assembly comprises a connector part and a first flow guide part communicated with the connector part, the connector part is connected to the refrigerant heat exchange part and arranged offset from the axis of symmetry, and the connector part is connected to the refrigerant heat exchange part by means of the first flow guide part and communicated with the flow channel inlet. The connector assembly is arranged to provide clearance for the battery cell module. The present application aims to improve the flow distribution uniformity of the refrigerant heat exchange part, thereby improving the temperature uniformity performance of the refrigerant heat exchange part.

Description

Battery device, refrigerant heat exchange device and electric device

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

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

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

[0004] In the related art, the refrigerant heat exchange component has the problem of poor uniform temperature performance, which leads to the problem of uneven heat exchange for the battery monomer assembly, and further affects the use performance and service life of the battery device. SUMMARY

[0005] The purpose of the embodiments of the present application is to provide a battery device, a refrigerant heat exchange device and an electric device, which aims to solve the technical problem of poor uniform temperature performance of the refrigerant heat exchange component in the battery device. TECHNICAL SOLUTION

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

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

[0008] a battery monomer assembly;

[0009] a refrigerant heat exchange component having a heat exchange surface, the heat exchange surface being close to or in contact with the battery monomer, the heat exchange surface having a symmetry axis, the refrigerant heat exchange component having a heat exchange flow channel inside, the heat exchange flow channel being symmetrically arranged on both sides of the symmetry axis, a flow channel inlet being formed on the heat exchange surface and being in communication with the heat exchange flow channel, the flow channel inlet being symmetrically arranged about the symmetry axis;

[0010] a joint assembly comprising a joint component and a first flow guide component in communication with the joint component, the joint component being connected to the refrigerant heat exchange component and being arranged away from the symmetry axis, the joint component being connected to the refrigerant heat exchange component through the first flow guide component and being in communication with the flow channel inlet; the joint assembly avoids the battery monomer assembly.

[0011] In the embodiment, the joint component is arranged on the refrigerant heat exchange component in a biased manner, the heat exchange flow channels are arranged in a symmetrical manner, the flow channel inlets are arranged symmetrically about the symmetry axis, the first flow guiding component is arranged to enable the heat exchange fluid to be delivered from the joint component to the flow channel inlets and to be symmetrically and uniformly distributed into the heat exchange flow channels, the uniform distribution is achieved, and thus the temperature distribution on the refrigerant heat exchange component and the heat exchange surface is more uniform, which is beneficial to improving the uniform temperature performance of the refrigerant heat exchange component and further improving the ability of the refrigerant heat exchange component to balance the heat exchange of the battery monomer assembly.

[0012] In one of the embodiments, the joint assembly further comprises a first flow collecting component connected between the refrigerant heat exchange component and the first flow guiding component to connect the first flow guiding component and the flow channel inlets in communication.

[0013] In the embodiment, the first flow collecting component is arranged to facilitate the connection and communication between the first flow guiding component and the flow channel inlets, and the first flow collecting component plays a role of flow guiding, flow guiding and changing the flow direction of the heat exchange fluid.

[0014] In one of the embodiments, the first flow collecting component has a flow collecting channel inside, the flow collecting channel includes a flow collecting inlet section and two flow collecting outlet sections in communication with the flow collecting inlet section, the flow collecting inlet section or a position where the flow collecting inlet section and the flow collecting outlet section are in communication has a flow uniformizing channel wall, the flow uniformizing channel wall is arranged to be in engagement with the heat exchange fluid, the two flow collecting outlet sections are arranged on the front and back sides of the flow uniformizing channel wall, and one end of the flow uniformizing channel wall close to the flow collecting outlet section on the front side is arranged to be inclined toward the flow collecting outlet section on the front side; the flow collecting inlet section is in communication with the first flow guiding component, and the two flow collecting outlet sections are in communication with the flow channel inlets.

[0015] In the embodiment, the flow collecting channel is divided into the flow collecting inlet section and the two flow collecting outlet sections, and the flow uniformizing channel wall is arranged in the flow collecting channel, one end of the flow uniformizing channel wall close to the flow collecting outlet section on the front side is inclined, so that the heat exchange fluid can flow relatively more toward the flow collecting outlet section on the front side, so that the heat exchange fluid can flow more uniformly to the two flow collecting outlet sections, and the uniform distribution is achieved.

[0016] In one of the embodiments, the inclination angle of the flow uniformizing channel wall ranges from greater than 0° to less than 90°.

[0017] In the embodiment, the inclination angle of the flow uniformizing channel wall is designed differently to adjust the position relationship and size between the flow collecting inlet section and the flow collecting outlet section, and to improve the flexibility of the flow collecting channel arrangement.

[0018] In one of the embodiments, the first flow guiding component has a first flow guiding channel formed inside, and one or more first protruding structures are arranged on the channel wall surface of the first flow guiding channel.

[0019] In the embodiment, the first protruding structure can make the heat exchange fluid in the first flow channel bypass, so that the heat exchange fluid in gas-liquid state can be mixed more uniformly, and the influence of the heat exchange fluid stratification caused by gravity can be reduced to facilitate improving the uniformity of the flow distribution.

[0020] In one of the embodiments, the first flow channel has a first central axis, and the first protruding structure extends along the length direction of the first flow channel and is arranged obliquely relative to the first central axis.

[0021] In the embodiment, the first protruding structure is arranged obliquely, so that the disturbance effect on the heat exchange fluid can be enhanced, the uniformity of gas-liquid mixing can be improved, and uniform flow distribution can be facilitated.

[0022] In one of the embodiments, the first flow channel has a first central axis, and the first protruding structure extends spirally around the first central axis.

[0023] In the embodiment, the first protruding structure extends spirally, so that the effect of the disturbance can be further improved, and the gas-liquid mixing can be more uniform.

[0024] In one of the embodiments, the joint assembly further comprises a first heat preservation structure, and the first heat preservation structure is wrapped on the outer surface of the first flow component.

[0025] In the embodiment, the first heat preservation structure is wrapped on the outer surface of the first flow component, so that the energy loss of the heat exchange fluid can be reduced, the risk of condensation of water vapor and the like in the heat exchange fluid can be reduced, and the first flow component can be protected.

[0026] In one of the embodiments, the first flow component is arranged to extend along a preset direction, the preset direction is arranged at a preset included angle with the direction of the symmetry axis, and the preset included angle ranges from greater than 0° to less than or equal to 90°.

[0027] In the embodiment, the size of the preset included angle can be set according to the position of the battery monomer assembly, the first flow component is arranged at the preset included angle with the symmetry axis, the structure is simple, and the manufacturing and installation are facilitated.

[0028] In one of the embodiments, the joint assembly further comprises a second flow component connected with the joint component, a flow channel outlet connected with the heat exchange channel is arranged on the heat exchange surface, and the second flow component is connected with the refrigerant heat exchange component and connected with the flow channel outlet.

[0029] In the embodiment, the second flow guide component plays a role of connecting and communicating between the refrigerant heat exchange component and the joint component. By arranging the second flow guide component, the heat exchange fluid flowing out of the refrigerant heat exchange component can flow to the joint component, and the external conveying device can be connected to the joint component to realize the input and output of the heat exchange fluid.

[0030] In one of the embodiments, the second flow guide component forms a second flow guide channel inside, and one or more second protruding structures are arranged on the channel wall surface of the second flow guide channel.

[0031] In the embodiment, the second protruding structure can play a role of bypassing the heat exchange fluid in the second flow guide channel, so that the heat exchange fluid in the gas-liquid state can be mixed more uniformly, and the influence of the heat exchange fluid stratification caused by gravity can be reduced.

[0032] In one of the embodiments, the second flow guide channel has a second central axis, and the second protruding structure extends along the length direction of the second flow guide channel and is arranged obliquely relative to the second central axis.

[0033] In the embodiment, the second protruding structure is arranged obliquely, so that the disturbance effect on the heat exchange fluid can be enhanced, and the uniformity of the gas-liquid mixing can be improved.

[0034] In one of the embodiments, the second protruding structure is arranged to extend spirally around the second central axis.

[0035] In the embodiment, the second protruding structure is arranged to extend spirally, so that the effect of the disturbance can be further improved, and the gas-liquid mixing can be more uniform.

[0036] In one of the embodiments, the joint assembly further comprises a second heat preservation structure, and the second heat preservation structure is wrapped on the outer surface of the second flow guide component.

[0037] In the embodiment, the second heat preservation structure is wrapped on the outer surface of the second flow guide component, so that the energy loss of the heat exchange fluid can be reduced, the risk of condensation of water vapor and the like in the heat exchange fluid can be reduced, and the second flow guide component can be protected.

[0038] In one of the embodiments, the joint assembly further comprises a second flow collecting component, and the second flow collecting component is connected between the refrigerant heat exchange component and the second flow guide component, so as to communicate the second flow guide component with the flow channel outlet.

[0039] In the embodiment, by additionally arranging the second flow collecting component, the second flow guide component can be connected and communicated with the flow channel outlet, and the second flow collecting component can play a role of guiding flow, guiding flow, and changing the flow direction of the heat exchange fluid.

[0040] In one of the embodiments, the battery device further comprises a box body having a containing space, the battery cell assembly is contained in the containing space, and the refrigerant heat exchange component is located in the containing space and arranged on a bottom of the box body to support the battery cell assembly.

[0041] In the embodiment, the refrigerant heat exchange component is arranged on the bottom of the box body, so that the bottom of the battery cell assembly is heat exchanged, the heat exchange area is large, and the heat exchange efficiency is improved.

[0042] In one of the embodiments, the battery device further comprises a box body, the refrigerant heat exchange component is connected to the box body and cooperatively forms the containing space with the box body, the battery cell assembly is contained in the containing space, and the refrigerant heat exchange component can support the battery cell assembly.

[0043] In the embodiment, the refrigerant heat exchange component can be connected to the box body, and the refrigerant heat exchange component can form a bottom plate of the box body, so that the refrigerant heat exchange component can heat exchange with the battery cell assembly and support the battery cell assembly at the same time, the structure of the external box body is simplified, and the weight of the battery device is reduced.

[0044] In one of the embodiments, the heat exchange surface has an edge region in the direction of the symmetry axis, and the joint assembly is arranged on the edge region.

[0045] In the embodiment, each component in the joint assembly is arranged on the edge region of the heat exchange surface, so that the joint assembly avoids the battery cell assembly, the heat exchange area between the heat exchange surface and the battery cell assembly is relatively increased, and the heat exchange efficiency of the refrigerant heat exchange component is ensured.

[0046] In a second aspect, the application provides a refrigerant heat exchange device, which comprises the refrigerant heat exchange component and the joint assembly in the battery device according to any one of the above.

[0047] In a third aspect, the application provides a power consumption device, which comprises the battery device according to any one of the above, and the battery device is used to store or provide electric energy.

[0048] The above description is only a summary of the technical solutions of the application, in order to more clearly understand the technical means of the application, the specific embodiments of the application can be implemented according to the content of the description, and in order to make the above and other purposes, characteristics and advantages of the application more obvious and easy to understand, the following specific embodiments of the application are described. BRIEF DESCRIPTION OF DRAWINGS

[0049] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the description of the embodiments of the present application or the prior art will be briefly introduced. Obviously, the drawings described below are only some of the embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0050] Fig. 1 is a structural schematic diagram of a vehicle according to some embodiments of the present application;

[0051] Fig. 2 is an exploded structural schematic diagram of a battery device according to some embodiments of the present application;

[0052] Fig. 3 is an exploded structural schematic diagram of a battery device according to some embodiments of the present application;

[0053] Fig. 4 is an exploded structural schematic diagram of a refrigerant heat exchange component and a battery cell assembly in a battery device according to some embodiments of the present application;

[0054] Fig. 5 is an exploded structural schematic diagram of a refrigerant heat exchange component and a joint assembly in a battery device according to some embodiments of the present application;

[0055] Fig. 6 is a structural schematic diagram of a joint assembly in a battery device according to some embodiments of the present application;

[0056] Fig. 7 is a B-B sectional view of Fig. 6;

[0057] Fig. 8 is a partial enlarged view of a C position in Fig. 7;

[0058] Fig. 9 is an A-A sectional view of Fig. 6;

[0059] Fig. 10 is a partial enlarged view of a D position in Fig. 9;

[0060] Fig. 11 is an exploded structural schematic diagram of a joint assembly in a battery device according to some embodiments of the present application.

[0061] Explanation of reference signs: 1000, vehicle; 1100, battery device; 1110, battery cell assembly; 1120, case; 1121, first part; 1122, second part; 11221, frame; 11222, case bottom; 1113, accommodation space; 1130, case body; 1131, cover; 1132, case frame; 1140, refrigerant heat exchange component; 1141, first sub-component; 1142, second sub-component; 1143, heat exchange surface; 1144, heat exchange flow channel; 11441, flow channel inlet; 11442, flow channel outlet; 11443, first sub-flow channel; 11444, second sub-flow channel; 1145, axis of symmetry; 1146, edge region; 1150, joint assembly; 1151, joint component; 1152, first flow guide component; 11521, first flow guide passage; 11522, first protruding structure; 1153, first flow collection component; 11531, flow collection passage; 11532, flow collection inlet section; 11533, flow collection outlet section; 11534, flow equalization flow channel wall; 1154, second flow guide component; 11541, second flow guide passage; 11542, second protruding structure; 1155, second flow collection component; 1156, first heat insulation structure; 1157, second heat insulation structure; 1200, controller; 1300, motor; a, inclination angle; β, preset included angle; X, preset direction; Y, direction of axis of symmetry. DETAILED DESCRIPTION

[0062] The embodiments of the technical solutions of the present application will be described in detail below with reference to the drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present application, and therefore only serve as examples, and cannot limit the protection scope of the present application.

[0063] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the present application; the terms "include" and "have" and any variations thereof in the specification and claims of the present application and the above description of drawings are intended to cover non-exclusive inclusion.

[0064] 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.

[0065] Reference to“an embodiment” herein means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase“in an embodiment” in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily mutually exclusive of one another. It is expressly understood that any of the embodiments described herein can be incorporated into any other embodiment in a manner known to those of ordinary skill in the art.

[0066] In the description of the embodiments of the application, the term“and / or” only means an association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which can mean that A exists alone, A and B exist together, and B exists alone. In addition, the character“ / ” herein generally means that the front and rear associated objects are in an“or” relationship.

[0067] In the description of the embodiments of the application, the term“a plurality of” means two or more (including two), and similarly, “a plurality of groups” means two or more groups (including two groups), and “a plurality of pieces” means two or more pieces (including two pieces).

[0068] In the description of the embodiments of the application, the technical terms“center”,“longitudinal”,“transverse”,“length”,“width”,“thickness”,“upper”,“lower”,“front”,“rear”,“left”,“right”,“vertical”,“horizontal”,“top”,“bottom”,“inner”,“outer”,“clockwise”,“counterclockwise”,“axial”,“radial”,“circumferential” and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the embodiments of the application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the embodiments of the application.

[0069] In the description of the embodiments of the application, unless otherwise explicitly specified and limited, the technical terms“mounting”,“connection”,“connection”,“fixing” and the like should be understood broadly, for example, 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 of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the application can be understood according to the specific circumstances.

[0070] In recent years, new energy vehicles have made a leap in development, and the market share of new energy vehicles is becoming higher and higher. It is an urgent problem to be solved in the new energy vehicle industry to realize energy replenishment quickly and efficiently.

[0071] In the process of charging and discharging of the battery device in a new energy vehicle, a large amount of heat is released. A refrigerant heat exchange component that can exchange heat with the battery monomer assembly is usually arranged in the battery device to achieve heat exchange and cooling of the battery monomer assembly through heat exchange.

[0072] In the related art, the refrigerant heat exchange component has poor uniform temperature performance, which leads to uneven heat exchange of the refrigerant heat exchange component with the battery monomer assembly, and further affects the use performance and service life of the battery device.

[0073] Especially in the case of fast charging of the battery device, the problem of uneven heat exchange of the refrigerant heat exchange component with the battery monomer assembly and poor uniform temperature performance is particularly obvious. Fast charging is a mainstream solution for new energy vehicles to achieve rapid energy replenishment. In the process of implementation, many challenges are encountered. A large amount of heat is generated in the electrode assembly during rapid charging. The refrigerant heat exchange component has uneven heat exchange with the battery monomer assembly, which leads to a sharp rise in temperature of part of the battery monomer assembly, and a large amount of heat is accumulated in the battery device, which is prone to cause a sharp rise in the internal temperature of the battery device, thereby affecting the use performance and service life of the battery device, and even causing a large hidden danger in the use of the battery device. Therefore, guaranteeing balanced heat dissipation, rapid heat exchange and improving the consistency of temperature distribution of the battery device have become the bottleneck of battery thermal management.

[0074] Specifically, heat is generated in the battery device during charging and discharging. If the heat cannot be effectively dissipated, it may cause performance degradation and service life reduction of the battery device. High temperature can accelerate the chemical reaction inside the battery device, increase the internal resistance of the battery device, reduce the energy density, and even cause thermal runaway in severe cases. Therefore, the refrigerant heat exchange component is arranged in the battery device to cool the battery monomer assembly therein.

[0075] For the technical problems of uneven heat exchange and poor uniform temperature performance of the refrigerant heat exchange component, it is found through research that the position of the inlet of the flow channel of the refrigerant heat exchange component in the battery device has the problem of uneven distribution, which affects the uniform distribution of the fluid on the refrigerant heat exchange component. When the refrigerant heat exchange component exchanges heat with the battery monomer assembly, it causes uneven heat exchange of each part of the battery monomer assembly, which leads to a local temperature that is too high on the battery monomer assembly, affects the normal use of the battery device, and affects the use performance and service life of the battery monomer assembly and the battery device.

[0076] Further analysis found that the refrigerant heat exchange component is provided with a joint assembly, the joint assembly is connected to the refrigerant heat exchange component and communicates with the flow channel inlet of the heat exchange flow channel. The flow channel inlet and the joint assembly are generally located at the edge of the refrigerant heat exchange component. In some battery devices, in order to meet the needs of structural design, the joint assembly needs to be installed in a biased manner. The bias refers to the joint assembly being arranged away from the symmetry axis of the heat exchange surface of the refrigerant heat exchange component. Therefore, the flow channel inlet is also located away from the symmetry axis, and correspondingly, the heat exchange flow channel also forms an asymmetric arrangement. Therefore, the biased flow channel inlet and the biased and asymmetric heat exchange flow channel cause uneven distribution of the heat exchange fluid, thereby causing poor uniformity of the refrigerant heat exchange component.

[0077] Therefore, the battery device provided by the application can symmetrically arrange the heat exchange flow channel inside the refrigerant heat exchange component, and connect the flow channel inlet of the heat exchange flow channel and the biased joint component through the first flow guide component. Therefore, the heat exchange fluid can be uniformly distributed from the flow channel inlet to the symmetric heat exchange flow channel, achieving the purpose of uniform distribution. The uniform distribution and symmetric arrangement of the heat exchange flow channel can improve the uniformity of the refrigerant heat exchange component, thereby improving the ability of the refrigerant heat exchange component to uniformly heat the battery cell assembly.

[0078] Specifically, referring to FIG. 2, the battery device (Battery Apparatus) provided by the application embodiment can include one or more battery cell assemblies 1110 for providing voltage and capacity. The battery cell assembly (Battery Cell Assembly) can include a plurality of battery cells connected in series, parallel or mixed connection through a busbar component. The battery device 1100 can also be a battery pack, which generally includes a box and one or more battery cell assemblies 1110, and the battery cell assemblies 1110 are accommodated in the box.

[0079] The battery device 1100 disclosed by the application embodiment can be used in various energy storage devices and energy storage systems using the battery device 1100 as a power source or an energy storage element. The power consumption device can be, but is not limited to, a mobile phone, a portable device, a notebook computer, an electric toy, an electric tool, an electric vehicle, a vehicle, a ship, a spacecraft, etc. Among them, the electric toy can include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys and electric plane toys, etc. The spacecraft can include airplanes, rockets, space shuttles and spaceships, etc.

[0080] The following embodiments take a power consumption device of an embodiment of the application, i.e., a vehicle 1000, as an example for illustration.

[0081] Referring to FIG. 1, FIG. 1 is a structural schematic diagram of a vehicle 1000 provided by some embodiments of the present application. The vehicle 1000 can be a fuel 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 device 1100, which can be arranged at the bottom, the head, or the tail of the vehicle 1000. The battery device 1100 can be used for power supply of the vehicle 1000, for example, the battery device 1100 can be used as an operating power supply of the vehicle 1000. The vehicle 1000 can further include a controller 1200 and a motor 1300, and the controller 1200 is used to control the battery device 1100 to supply power to the motor 1300, for example, to meet the working power demand of the vehicle 1000 during starting, navigation, and driving.

[0082] In some embodiments of the present application, the battery device 1100 can not only be used as an operating power supply of the vehicle 1000, but also be used as a driving power supply of the vehicle 1000, to replace or partially replace fuel or natural gas to provide driving power for the vehicle 1000.

[0083] Referring to FIG. 2, FIG. 2 is an exploded structural schematic diagram of the battery device 1100 provided by some embodiments of the present application. The battery device 1100 includes a box body 1120 and a battery monomer assembly 1110, and the box body 1120 forms an accommodation space 1113 therein, and the battery monomer assembly 1110 is accommodated in the accommodation space 1113. The battery monomer assembly 1110 is usually arranged by a plurality of battery monomers, or the battery monomer assembly 1110 can also be a battery module, which is formed by arranging and fixing a plurality of battery monomers into an independent module. The box body 1120 is used to provide the accommodation space 1113 for the battery monomer assembly 1110, and the box body 1120 can adopt various structures.

[0084] The battery monomer refers to the smallest unit of the battery device 1100. Each battery monomer can be a secondary battery monomer or a primary battery monomer, and can also be a lithium-sulfur battery monomer, a sodium-ion battery monomer, or a magnesium-ion battery monomer, but is not limited thereto. The battery monomer can be in the shape of a cylinder, a flat body, a cuboid, or other shapes, etc.

[0085] According to some embodiments of the present application, referring to FIGS. 2-5, the present application provides a battery device 1100, which comprises a battery cell assembly 1110, a refrigerant heat exchange component 1140, and a joint assembly 1150. The refrigerant heat exchange component 1140 has a heat exchange surface 1143, which is close to or in contact with the battery cell. The heat exchange surface 1143 has a symmetry axis 1145. The refrigerant heat exchange component 1140 has a heat exchange flow channel 1144 inside, which is symmetrically arranged on both sides of the symmetry axis 1145. The heat exchange surface 1143 is provided with a flow channel inlet 11441, which is in communication with the heat exchange flow channel 1144 and is symmetrically arranged about the symmetry axis 1145. The joint assembly 1150 comprises a joint component 1151 and a first flow guide component 1152 in communication with the joint component 1151. The joint component 1151 is connected to the refrigerant heat exchange component 1140 and is arranged away from the symmetry axis 1145. The joint component 1151 is connected to the refrigerant heat exchange component 1140 through the first flow guide component 1152 and is in communication with the flow channel inlet 11441. The joint assembly 1150 is arranged to avoid the battery cell assembly 1110.

[0086] Specifically, the battery cell assembly 1110 comprises one or more battery cells. The refrigerant heat exchange component 1140 needs to exchange heat with the battery cell assembly 1110. Therefore, the refrigerant heat exchange component 1140 needs to be arranged close to the battery cell assembly 1110, or the refrigerant heat exchange component 1140 needs to directly contact or abut the battery cell assembly 1110, so as to improve the heat exchange effect. When the refrigerant heat exchange component 1140 exchanges heat with the battery cell assembly 1110, a larger heat exchange surface 1143 needs to be formed between the refrigerant heat exchange component 1140 and the battery cell, so as to improve the heat exchange effect. Therefore, the heat exchange surface 1143 close to or in contact with the surface of the battery cell is formed on the refrigerant heat exchange component 1140.

[0087] The surface of the battery cell close to or in contact with the heat exchange surface 1143 can be the bottom surface of the battery cell or the side surface of the battery cell. Taking the example that the battery device 1100 is horizontally placed, the surface below the battery cell is the bottom surface, and the surface of the battery cell along the vertical direction is the side surface. In the present embodiment, the heat exchange surface 1143 of the refrigerant heat exchange component 1140 can be in contact with or close to the bottom surface or the side surface of the battery cell, that is, the refrigerant heat exchange component 1140 can be located at the bottom of the battery cell assembly 1110 or at the side of the battery cell assembly 1110. The refrigerant heat exchange component 1140 located at the bottom of the battery cell assembly 1110 can also be referred to as a heat exchange bottom plate or a cooling bottom plate.

[0088] The following embodiments are described by way of example with the battery device 1100 horizontally placed and the refrigerant heat exchange component 1140 located at the bottom of the battery cell assembly 1110.

[0089] For the heat exchange flow channel 1144 inside the refrigerant heat exchange component 1140, the heat exchange flow channel 1144 can be a hole structure inside the refrigerant heat exchange component 1140. For example, the refrigerant heat exchange component 1140 is in the form of a plate, and a through-hole structure or a cavity structure with a certain extension length and extension path is formed in the plate of the refrigerant heat exchange component 1140, which forms the heat exchange flow channel 1144. The refrigerant heat exchange component 1140 can be integrally formed, and the heat exchange flow channel 1144 can be formed by gas-assisted or water-assisted molding. Alternatively, the refrigerant heat exchange component 1140 can also be formed by combined molding. For example, the refrigerant heat exchange component 1140 includes a first sub-component 1141 and a second sub-component 1142, the second sub-component 1142 has a recess structure with a predetermined extension length and extension shape, the recess structure can be formed by stamping, the first sub-component 1141 is fixedly or detachably connected to the second sub-component 1142, and the slot of the recess structure is closed to form a through-hole structure or a cavity structure, that is, the heat exchange flow channel 1144. The heat exchange flow channel 1144 should be close to the heat exchange surface 1143, and the extension path of the heat exchange flow channel 1144 can be parallel to the heat exchange surface 1143 to increase the heat exchange effect.

[0090] The heat exchange surface 1143 has a symmetry axis 1145. It should be noted that the symmetry axis 1145 is a virtual axis and is set to reflect the symmetry of the heat exchange surface 1143 and the symmetry of the heat exchange flow channel 1144. The heat exchange flow channel 1144 has a symmetrical structure, and the heat exchange flow channel 1144 is symmetrically arranged on both sides of the symmetry axis 1145. For example, the heat exchange flow channel 1144 includes a first sub-flow channel 11443 and a second sub-flow channel 11444, the first sub-flow channel 11443 and the second sub-flow channel 11444 are both connected to the flow channel inlet 11441, and the first sub-flow channel 11443 and the second sub-flow channel 11444 are symmetrically arranged about the symmetry axis 1145. Correspondingly, the flow channel inlet 11441 is symmetric about the symmetry axis 1145. It should be understood that when the flow channel inlet 11441 has one, the flow channel inlet 11441 is arranged on the symmetry axis 1145. When the flow channel inlet 11441 has multiple, the multiple flow channel inlets 11441 are symmetrically arranged on both sides of the symmetry axis 1145.

[0091] For the joint assembly 1150, the joint assembly 1150 at least includes a joint component 1151 and a first flow guide component 1152, wherein the joint component 1151 is arranged offset from the symmetry axis 1145, that is, the joint component 1151 forms an offset mounting form on the heat exchange surface 1143 of the refrigerant heat exchange component 1140, the joint component 1151 is a connector structure of the heat exchange fluid into the flow channel inlet 11441, and the joint component 1151 is used to connect with external fluid conveying pipelines and the like. A certain spacing distance is formed between the joint component 1151 and the flow channel inlet 11441, so it is known that the first flow guide component 1152 is connected between the joint component 1151 and the flow channel inlet 11441, for example, the first flow guide component 1152 adopts a pipe body structure, one end of the first flow guide component 1152 is connected to the joint component 1151, the other end of the first flow guide component 1152 is connected to the flow channel inlet 11441, the first flow guide component 1152 is used to convey the heat exchange fluid entering the inside of the joint component 1151 to the inside of the heat exchange flow channel 1144, and the first flow guide component 1152 plays a role of conveying fluid and guiding flow.

[0092] Since the heat exchange surface 1143 of the refrigerant heat exchange component 1140 needs to be arranged in relative to the battery monomer assembly 1110, when the joint component 1151 and the first flow guide component 1152 in the joint assembly 1150 are connected on the refrigerant heat exchange component 1140, the joint component 1151 and the first flow guide component 1152 need to avoid the battery monomer assembly 1110 to avoid interference with the installation of the battery monomer assembly 1110, especially when the joint assembly 1150 protrudes on the heat exchange surface 1143, the joint assembly 1150 as a whole needs to avoid the installation of the battery monomer assembly 1110.

[0093] The heat exchange fluid can adopt heat exchange refrigerant, and the refrigerant heat exchange component 1140 can adopt a direct cooling heat exchange mode. When the battery device 1100 needs heat exchange, the external conveying pipeline is assembled with the joint component 1151, the heat exchange fluid enters the first flow guide component 1152 through the joint component 1151, the first flow guide component 1152 conveys the heat exchange fluid to the flow channel inlet 11441, and the heat exchange fluid is symmetrically divided into two sides of the symmetry axis 1145 of the flow channel inlet 11441, achieving symmetric and uniform division, that is, the heat exchange fluid is uniformly divided into the first sub-flow channel 11443 and the second sub-flow channel 11444 through the flow channel inlet 11441.

[0094] In this embodiment, the joint component 1151 is mounted on the refrigerant heat exchange component 1140 in a biased manner, the heat exchange flow channels 1144 are arranged symmetrically, and the flow channel inlets 11441 are arranged symmetrically about the symmetry axis 1145. By adding the first flow guide component 1152, the heat exchange fluid can be transported from the joint component 1151 to the flow channel inlets 11441 and symmetrically and uniformly distributed into the heat exchange flow channels 1144, achieving uniform distribution, thereby making the temperature distribution on the refrigerant heat exchange component 1140 and the heat exchange surface 1143 more uniform, which is beneficial to improving the uniform temperature performance of the refrigerant heat exchange component 1140 and further improving the ability of the refrigerant heat exchange component 1140 to balance the heat exchange of the battery monomer assembly 1110.

[0095] In some embodiments, referring to FIGS. 5-8, the joint assembly 1150 further includes a first flow collecting component 1153 connected between the refrigerant heat exchange component 1140 and the first flow guide component 1152 for connecting the first flow guide component 1152 and the flow channel inlets 11441.

[0096] Specifically, the first flow collecting component 1153 is connected to the refrigerant heat exchange component 1140 and is located at the position of the flow channel inlets 11441, so that the first flow collecting component 1153 communicates with the flow channel inlets 11441. It can be understood that the installation position of the first flow collecting component 1153 should be symmetrically arranged about the symmetry axis 1145, for example, the first flow collecting component 1153 is installed on the symmetry axis 1145 of the heat exchange surface 1143. The first flow collecting component 1153 is also connected to and communicates with the first flow guide component 1152. It can be understood that the first flow collecting component 1153 is connected between the refrigerant heat exchange component 1140 and the first flow guide component 1152, and the first flow collecting component 1153 plays a role of connection between the refrigerant heat exchange component 1140 and the first flow guide component 1152, and the first flow collecting component 1153 can communicate between the first flow guide component 1152 and the flow channel inlets 11441.

[0097] The first flow collecting component 1153 can adopt a seat structure or a pipe structure, etc. Since the first flow collecting component 1153 communicates the first flow guide component 1152 and the flow channel inlets 11441, it can be understood that the inside of the first flow collecting component 1153 needs to be provided with a passage for the flow of heat exchange fluid. The passage can also change the flow direction of the heat exchange fluid. For example, the heat exchange fluid is transported in the horizontal direction in the first flow guide component 1152, and then the flow direction of the heat exchange fluid changes to the vertical direction after passing through the first flow collecting component 1153, and then flows into the flow channel inlets 11441.

[0098] In the embodiment, the first flow collecting member 1153 is added to facilitate the connection and communication between the first flow guiding member 1152 and the flow channel inlet 11441, and the first flow collecting member 1153 plays a role of guiding flow, guiding flow and changing the flow direction of the heat exchange fluid.

[0099] In some embodiments, referring to FIGS. 7 and 8, the first flow collecting member 1153 has a flow collecting channel 11531 inside, which includes a flow collecting inlet section 11532 and two flow collecting outlet sections 11533 each in communication with the flow collecting inlet section 11532. The flow collecting inlet section 11532 has a flow uniformizing channel wall 11534 inside or at a position where the flow collecting inlet section 11532 communicates with the flow collecting outlet section 11533. The flow uniformizing channel wall 11534 is arranged to conform to the heat exchange fluid. The two flow collecting outlet sections 11533 are arranged on the front and back sides of the flow uniformizing channel wall 11534, respectively. The end of the flow uniformizing channel wall 11534 close to the flow collecting outlet section 11533 is inclined towards the flow collecting outlet section 11533 close to the front side. The flow collecting inlet section 11532 is in communication with the first flow guiding member 1152, and the two flow collecting outlet sections 11533 are each in communication with the flow channel inlet 11441.

[0100] Specifically, the flow collecting channel 11531 can be a through-hole structure formed inside the first flow collecting member 1153. The flow collecting channel 11531 can include a plurality of through-hole structures, and a plurality of flow collecting channels 11531 can also be provided. The plurality of flow collecting channels 11531 can each communicate the first flow guiding member 1152 and the flow channel inlet 11441.

[0101] The flow collecting channel 11531 includes two parts, one part being the flow collecting inlet section 11532 and the other part being the flow collecting outlet section 11533. The flow collecting outlet section 11533 is provided with two flow collecting outlet sections 11533 each in communication with the flow collecting inlet section 11532. The flow collecting inlet section 11532 and the flow collecting outlet section 11533 can be connected in a fixed or detachable manner, or the flow collecting inlet section 11532 and the flow collecting outlet section 11533 can be an integral structure. When the heat exchange fluid flows in the flow collecting channel, it first enters the flow collecting inlet section 11532, then flows into the two flow collecting outlet sections 11533 from the flow collecting inlet section 11532, and then enters the flow channel inlet 11441 through the two flow collecting outlet sections 11533.

[0102] It can be understood that the interiors of the flow collection inlet section 11532 and the flow collection outlet section 11533 form part of the flow collection channel 11531, which can adopt a hole structure. The flow collection channel 11531 has a flow uniformity channel wall 11534 in the interior of the flow collection inlet section 11532 or the flow collection channel 11531 that is in communication with the flow collection inlet section 11532 and the flow collection outlet section 11533. The flow uniformity channel wall 11534 can be understood as part of the channel wall in the flow collection channel 11531. The flow uniformity channel wall 11534 is arranged to be in engagement with the heat exchange fluid, so that when the heat exchange fluid flows in the flow collection channel, the heat exchange fluid will flow towards the flow uniformity channel wall 11534, and the heat exchange fluid will form a counteracting impact force on the flow uniformity channel wall 11534. For example, when the flow collection channel has a flow collection inlet, the flow collection inlet can be arranged opposite to the flow collection channel wall.

[0103] In the related art, if the flow uniformity channel wall 11534 is not arranged obliquely, due to the effect of inertial force, the heat exchange fluid will flow more towards the flow collection outlet section 11533 behind (or on the rear side) of the flow uniformity channel wall 11534 after passing through the flow uniformity channel wall 11534, resulting in that the volumes of the heat exchange fluid flowing into the two flow collection outlet sections 11533 are not the same or differ greatly, thereby causing uneven distribution of the flow.

[0104] In the embodiment, for the arrangement of the flow uniformity channel wall 11534, the flow uniformity channel wall 11534 is located at a transition position where the flow collection inlet section 11532 is connected to the two flow collection outlet sections 11533. The flow uniformity channel wall 11534 has front and rear sides. The front side of the flow uniformity channel wall 11534 refers to the side where the wall surface of the flow uniformity channel wall 11534 faces the interior of the flow collection channel. The rear side of the flow uniformity channel wall 11534 refers to the side where the wall surface of the flow uniformity channel wall 11534 faces away from the interior of the flow collection channel. At the transition position, one end of the flow uniformity channel wall 11534 close to the flow collection outlet section 11533 is arranged obliquely towards the flow collection outlet section 11533 close to the front side, so as to achieve the effect of guiding the flow uniformity channel wall 11534 towards the flow collection outlet section 11533 on the front side, and enable the heat exchange fluid to flow relatively more towards the flow collection outlet section 11533 on the front side, so that the heat exchange fluid can flow more uniformly to the two flow collection outlet sections 11533.

[0105] For the convenience of description, the current collection outlet section 11533 located at the front side of the flow equalization channel wall 11534 is defined as the first current collection outlet section 11533, and the current collection outlet section 11533 located at the rear side of the flow equalization channel wall 11534 is defined as the second current collection outlet section 11533. Taking the flow direction of the internal heat exchange fluid of the first flow guide component 1152 as horizontal, and the fluid in the current collection inlet section 11532 as vertical, the current collection outlet section 11533 is located below the current collection inlet section 11532, the flow equalization channel wall 11534 is not horizontally arranged, the upper end of the flow equalization channel wall 11534 is close to one end of the current collection inlet section 11532, and the lower end of the flow equalization channel wall 11534 is close to one end of the current collection outlet section 11533. The flow equalization channel wall 11534 is arranged obliquely, and the lower end of the flow equalization channel wall 11534 is inclined toward the first current collection outlet section 11533. It can be understood that the fluid flowing onto the flow equalization channel wall 11534 can be transported toward the first current collection outlet section 11533 by the blocking of the flow equalization channel wall 11534, so that the flow of the heat exchange fluid entering the first current collection outlet section 11533 and the second current collection outlet section 11533 can be more balanced.

[0106] In the embodiment, the current collection channel 11531 is divided into the current collection inlet section 11532 and two current collection outlet sections 11533, and the flow equalization channel wall 11534 is arranged in the current collection channel 11531. By inclining the end of the flow equalization channel wall 11534 close to the current collection outlet section 11533 toward the front current collection outlet section 11533, the heat exchange fluid can flow relatively more toward the front current collection outlet section 11533, so that the heat exchange fluid can flow more uniformly to the two current collection outlet sections 11533, thereby achieving uniform distribution.

[0107] In some embodiments, referring to FIG. 8, the inclination angle a of the flow equalization channel wall 11534 ranges from greater than 0° to less than 90°.

[0108] Specifically, taking the channel in the first flow guide component 1152 as horizontal, and the channel in the current collection inlet section 11532 as vertical, the inclination angle a is the included angle between the flow equalization channel wall 11534 and the vertical direction, and the inclination angle a ranges from greater than 0° to less than 90°, for example, the inclination angle a is 10°, 20°, 30°, 45°, 60°, 75°, 80°, etc.

[0109] In the embodiment, the inclination angle a of the flow equalization channel wall 11534 is designed differently to adjust according to the different positional relationships, sizes, etc. between the current collection inlet section 11532 and the current collection outlet section 11533, thereby improving the flexibility of the arrangement of the current collection channel 11531.

[0110] The heat exchange fluid is generally refrigerant, and the refrigerant is generally in a gas-liquid mixed state. Due to the action of gravity, the heat exchange fluid is stratified into gas and liquid, which further causes uneven mixing of the heat exchange fluid, and affects the uniformity of the flow distribution.

[0111] Therefore, in some embodiments, referring to FIGS. 7 and 8, the first flow guide component 1152 has a first flow guide channel 11521 formed inside, and one or more first protruding structures 11522 are protruded on the channel wall surface of the first flow guide channel 11521.

[0112] Specifically, the first flow guide channel 11521 can be a through-hole structure formed inside the first flow guide component 1152, and the first protruding structure 11522 is protruded on the channel wall, protruding from the channel wall into the channel cavity, and the protruding height of the first protruding structure 11522 is less than the inner diameter of the first flow guide channel 11521. The first protruding structure 11522 can be located at any position of the cross-sectional profile of the first flow guide channel 11521, for example, the first protruding structure 11522 is located at the bottom of the first flow guide channel 11521, and the first protruding structure 11522 is protruded upward from the bottom in the first flow guide channel 11521. The first protruding structure 11522 can be in a sheet shape, a column shape, etc.

[0113] When the heat exchange fluid flows through the first flow guide channel 11521, the heat exchange fluid impacts the surface of the first protruding structure 11522, and the first protruding structure 11522 extends into the interior of the heat exchange fluid, thereby playing a role of dispersing and disturbing the heat exchange fluid.

[0114] In this embodiment, the first protruding structure 11522 can play a role of bypassing the heat exchange fluid in the first flow guide channel 11521, so that the heat exchange fluid in a gas-liquid state can be mixed more uniformly, and the influence of stratification of the heat exchange fluid caused by gravity can be reduced, thereby facilitating the improvement of the uniformity of the flow distribution.

[0115] In some embodiments, referring to FIG. 8, the first flow guide channel 11521 has a first central axis, and the first protruding structure 11522 extends along the length direction of the first flow guide channel 11521 and is arranged inclined to the first central axis.

[0116] Specifically, the first central axis can be considered as an extension axis of the first flow channel 11521, the first protruding structure 11522 is located on the channel wall of the first flow channel 11521 and extends along the channel wall by a preset length, and the extension axis of the first protruding structure 11522 is arranged non-parallel to the first central axis of the first flow channel 11521, that is, the extension axis of the first protruding structure 11522 is inclined to the first central axis to form an angle, the range of the angle is greater than 0° and less than 90°, and the first protruding structure 11522 can be arranged to be inclined downward or inclined upward along the flow direction of the heat exchange fluid. It can be seen that the extension length direction of the first protruding structure 11522 and the flow direction of the heat exchange fluid are arranged at an angle.

[0117] Therefore, it can be seen that when the heat exchange fluid flows through the first protruding structure 11522 arranged at an angle, the upper and lower surfaces of the first protruding structure 11522 can make the heat exchange fluid flow upward and downward, respectively, thereby changing the original flow direction of the heat exchange fluid and changing the flow direction of the heat exchange fluid, thereby disturbing the flow of the heat exchange fluid and mixing the gas and liquid more uniformly.

[0118] In the embodiment, the first protruding structure 11522 is arranged at an angle, thereby enhancing the disturbance effect on the heat exchange fluid, improving the uniformity of gas-liquid mixing, and facilitating uniform distribution.

[0119] In some embodiments, referring to FIGS. 8-10, the first protruding structure 11522 is arranged to extend spirally around the first central axis.

[0120] Specifically, the first protruding structure 11522 extends along an arc-shaped trajectory in the first flow channel 11521 and forms a spiral shape, and the first protruding structure 11522 can be provided in plurality, and the plurality of first protruding structures 11522 are arranged in parallel and spaced apart, thereby forming the first protruding structure 11522 outwardly protruding on the entire circumference of the channel wall of the first flow channel 11521. The spiral angle of the first protruding structure 11522 can be greater than 0° and less than or equal to 45°.

[0121] The spiral-shaped first protruding structure 11522 can reciprocate in the up-down direction when the heat exchange fluid flows, thereby overcoming the action of gravity and mixing the gas and liquid more uniformly. On the other hand, the spiral-shaped first protruding structure 11522 also has the functions of conveying and guiding.

[0122] In the embodiment, the first protruding structure 11522 is arranged to extend spirally, thereby further improving the effect of disturbing flow and mixing the gas and liquid more uniformly.

[0123] In some embodiments, referring to FIG. 11, the joint assembly 1150 further comprises a first heat preservation structure 1156, which is wrapped on the outer surface of the first flow guide component 1152.

[0124] Specifically, the first heat preservation structure 1156 is used to preserve the heat exchange fluid flowing through the inside of the first flow guide component 1152, so as to reduce the risk of condensation of the gas portion, water vapor and the like in the heat exchange fluid. The first heat preservation structure 1156 is wrapped on the outer surface of the first flow guide component 1152, and the first heat preservation structure 1156 and the first flow guide component 1152 can be connected by bonding, bundling, fastener connection and the like. The first heat preservation structure 1156 can be made of heat preservation and insulation materials, for example, the first heat preservation structure 1156 can be heat preservation cotton, heat preservation blanket and the like.

[0125] In this embodiment, by wrapping the first heat preservation structure 1156 on the outer surface of the first flow guide component 1152, the energy loss of the heat exchange fluid is reduced, and the risk of condensation of water vapor and the like in the heat exchange fluid is reduced, thereby protecting the first flow guide component 1152.

[0126] In some embodiments, referring to FIG. 5, the first flow guide component 1152 is arranged along a preset direction X, the preset direction X is arranged at a preset included angle β with the direction Y of the symmetry axis, and the preset included angle β is greater than 0° and less than or equal to 90°.

[0127] Specifically, the first flow guide component 1152 can be made of a pipe body structure, and the preset direction X is the length direction of the first flow guide component 1152, which can be parallel to the heat exchange surface 1143. The cross-sectional outer contour of the first flow guide component 1152 can be circular, elliptical or polygonal, etc. The first flow guide component 1152 can be made of a metal pipe, a plastic pipe, etc., and the first flow guide component 1152 can also be made of a flexible pipe or a rigid pipe, etc.

[0128] The preset direction X is arranged at a preset included angle β with the direction Y of the symmetry axis, that is, the length direction of the first flow guide component 1152 is arranged at a preset included angle β with the direction Y of the symmetry axis, and the preset included angle β is between 0° and 90°, but does not include 0°, for example, the preset included angle β can be 10°, 20°, 30°, 45°, 60°, 75° and 90°, etc. For example, when the preset included angle β is 90°, it can be known that the length direction of the first flow guide component 1152 is perpendicular to the direction Y of the symmetry axis, and the first flow guide component 1152 vertically faces the position of the symmetry axis 1145 on one side of the symmetry axis 1145 to transport the heat exchange fluid, and the heat exchange fluid passes through the flow guide flow channel wall 11534, thereby being able to flow more uniformly into the heat exchange flow channels 1144 on both sides of the symmetry axis 1145.

[0129] In this embodiment, the size of the preset included angle β can be specifically set according to the position of the battery monomer assembly 1110, so as to avoid the interference of the first flow guide component 1152 with the battery monomer assembly 1110. The first flow guide component 1152 is arranged at a preset included angle β with the symmetry axis 1145, and the structure is simple and convenient for manufacturing and installation.

[0130] In some embodiments, referring to FIGS. 5-7, the joint assembly 1150 further includes a second flow guide component 1154 connected with the joint component 1151. The heat exchange surface 1143 is provided with a flow channel outlet 11442 connected with the heat exchange flow channel 1144. The second flow guide component 1154 is connected with the refrigerant heat exchange component 1140 and connected with the flow channel outlet 11442.

[0131] Specifically, the heat exchange flow channel 1144 includes an inlet flow channel and a return flow channel connected with each other. The inlet of the inlet flow channel is the flow channel inlet 11441, and the outlet of the return flow channel is the flow channel outlet 11442. The flow channel outlet 11442 is arranged on the heat exchange surface 1143. After the heat exchange between the heat exchange fluid and the battery monomer assembly 1110, the heat exchange fluid flows into the second flow guide component 1154 through the flow channel outlet 11442.

[0132] The second flow guide component 1154 is used for externally conveying the heat exchange fluid in the refrigerant heat exchange component 1140. The second flow guide component 1154 is internally provided with a through hole structure. For example, the second flow guide component 1154 can adopt a pipe body structure. One end of the second flow guide component 1154 is connected with the refrigerant heat exchange component 1140 and connected with the flow channel outlet 11442. The other end of the second flow guide component 1154 is connected with the joint component 1151 and connected with each other.

[0133] It can be understood that the first flow guide component 1152 and the second flow guide component 1154 are respectively connected between the joint component 1151 and the refrigerant heat exchange component 1140. The first flow guide component 1152 is used for conveying the heat exchange fluid into the refrigerant heat exchange component 1140, and the second flow guide component 1154 is used for outputting the heat exchange fluid outside the refrigerant heat exchange component 1140. The first flow guide component 1152 and the second flow guide component 1154 can be independent components, or the first flow guide component 1152 and the second flow guide component 1154 can be connected to form an integrated structure.

[0134] In this embodiment, the second flow guide component 1154 plays a role of connection and communication between the refrigerant heat exchange component 1140 and the joint component 1151. By arranging the second flow guide component 1154, the heat exchange fluid flowing out of the refrigerant heat exchange component 1140 can flow to the joint component 1151, and the external conveying device can be connected with the joint component 1151 to realize the input and output of the heat exchange fluid.

[0135] In some embodiments, referring to FIGS. 5, 6 and 10, the second flow guide component 1154 has a second flow guide passage 11541 formed inside the second flow guide component 1154, and one or more second protruding structures 11542 are protruded from the passage wall of the second flow guide passage 11541.

[0136] Specifically, the second flow guide passage 11541 can be a through-hole structure formed inside the second flow guide component 1154, and the second protruding structure 11542 is protruded from the passage wall, protruding from the passage wall towards the passage cavity, and the protruding height of the second protruding structure 11542 is less than the inner diameter of the second flow guide passage 11541. The second protruding structure 11542 can be located at any position of the cross-sectional profile of the second flow guide passage 11541, for example, the second protruding structure 11542 is located at the bottom of the second flow guide passage 11541, and the second protruding structure 11542 is protruded upwards from the bottom inside the second flow guide passage 11541. The second protruding structure 11542 can be in the form of a sheet, a column, etc.

[0137] When the heat exchange fluid flows through the second flow guide passage 11541, the heat exchange fluid impacts the surface of the second protruding structure 11542, and the second protruding structure 11542 extends into the interior of the heat exchange fluid, thereby playing a role of dispersing and disturbing the heat exchange fluid.

[0138] In this embodiment, the second protruding structure 11542 can play a role of bypassing the heat exchange fluid in the second flow guide passage 11541, thereby enabling the heat exchange fluid in gas-liquid state to be mixed more uniformly, and reducing the influence of the heat exchange fluid stratification caused by gravity.

[0139] In some embodiments, referring to FIGS. 5, 6 and 9, the second flow guide passage 11541 has a second central axis, and the second protruding structure 11542 extends along the length direction of the second flow guide passage 11541 and is arranged inclined relative to the second central axis.

[0140] Specifically, the second central axis can be considered as the extension axis of the second flow guide passage 11541, the second protruding structure 11542 is located on the passage wall of the second flow guide passage 11541 and extends along the passage wall by a predetermined length, and the extension axis of the second protruding structure 11542 is arranged non-parallel to the second central axis of the second flow guide passage 11541, that is, the extension axis of the second protruding structure 11542 is arranged inclined to the second central axis at an angle, and the angle is greater than 0° and less than 90°. In the flow direction of the heat exchange fluid, the second protruding structure 11542 can be arranged inclined downward or inclined upward. It can be seen that the extension direction of the second protruding structure 11542 is arranged at an angle with the flow direction of the heat exchange fluid.

[0141] Therefore, when the heat exchange fluid flows through the second protruding structure 11542 arranged in an inclined manner, the upper and lower surfaces of the second protruding structure 11542 can make the heat exchange fluid flow upward and downward, respectively, so that the original flow direction of the heat exchange fluid is changed and the flow direction is changed in multiple directions, thereby disturbing the flow of the heat exchange fluid, and the gas and liquid of the heat exchange fluid can be mixed more uniformly.

[0142] In this embodiment, the second protruding structure 11542 is arranged in an inclined manner, so that the disturbance effect on the heat exchange fluid can be enhanced, and the uniformity of gas-liquid mixing can be improved.

[0143] In some embodiments, referring to FIG. 9, the second protruding structure 11542 is arranged in a spiral manner around the second central axis.

[0144] Specifically, the second protruding structure 11542 extends along an arc-shaped trajectory in the second flow guide channel 11541 and forms a spiral shape, and a plurality of second protruding structures 11542 can be provided, which are arranged in parallel and spaced apart, so that the entire circumference of the channel wall of the second flow guide channel 11541 is formed with the second protruding structure 11542 protruding outward. The spiral angle of the second protruding structure 11542 can be greater than 0° and less than or equal to 45°.

[0145] The spiral-shaped second protruding structure 11542 can reciprocate in the up-down direction when the heat exchange fluid flows, thereby overcoming the action of gravity and making the gas-liquid mixing more uniform. On the other hand, the spiral-shaped second protruding structure 11542 also has the functions of conveying and guiding.

[0146] In this embodiment, the second protruding structure 11542 is arranged in a spiral shape, so that the disturbance effect can be further improved, and the gas-liquid mixing can be more uniform.

[0147] In some embodiments, referring to FIG. 11, the joint assembly 1150 further includes a second heat preservation structure 1157, and the second heat preservation structure 1157 is wrapped on the outer surface of the second flow guide component 1154.

[0148] Specifically, the second heat preservation structure 1157 is used to preserve the heat exchange fluid flowing through the inside of the second flow guide component 1154, so as to reduce the risk of condensation of the gas part, water vapor and the like in the heat exchange fluid. The second heat preservation structure 1157 is wrapped on the outer surface of the second flow guide component 1154, and the second heat preservation structure 1157 and the second flow guide component 1154 can be connected by bonding, bundling, fastener connection or the like. The second heat preservation structure 1157 can be made of heat preservation and heat insulation materials, for example, the second heat preservation structure 1157 can be heat preservation cotton, heat preservation blanket or the like.

[0149] In this embodiment, the second heat preservation structure 1157 is wrapped around the outer surface of the second flow guide component 1154, so as to reduce the energy loss of the heat exchange fluid, reduce the risk of condensation of water vapor and the like in the heat exchange fluid, and protect the second flow guide component 1154.

[0150] In some embodiments, referring to FIGS. 5 and 6, the joint assembly 1150 further comprises a second flow collecting component 1155 connected between the refrigerant heat exchange component 1140 and the second flow guide component 1154, so as to connect the second flow guide component 1154 and the flow channel outlet 11442 in communication.

[0151] Specifically, the second flow collecting component 1155 is connected to the refrigerant heat exchange component 1140 and is located at the position of the flow channel outlet 11442, so that the second flow collecting component 1155 communicates with the flow channel outlet 11442. It can be understood that the installation position of the second flow collecting component 1155 should be symmetrically arranged about the symmetry axis 1145, for example, the second flow collecting component 1155 is installed on the symmetry axis 1145 of the heat exchange surface 1143. The second flow collecting component 1155 is also connected to and communicates with the second flow guide component 1154. It can be understood that the second flow collecting component 1155 is connected between the refrigerant heat exchange component 1140 and the second flow guide component 1154, and the second flow collecting component 1155 plays a role of bridging between the refrigerant heat exchange component 1140 and the second flow guide component 1154, and the second flow collecting component 1155 can connect the second flow guide component 1154 and the flow channel outlet 11442 in communication.

[0152] The second flow collecting component 1155 can adopt a seat body structure or a pipe body structure, etc. Since the second flow collecting component 1155 communicates the second flow guide component 1154 and the flow channel outlet 11442, it can be understood that the inside of the second flow collecting component 1155 needs to be provided with a channel for the flow of the heat exchange fluid, and the channel can also change the flow direction of the heat exchange fluid. For example, the flow direction of the heat exchange fluid at the position of the flow channel outlet 11442 is along the vertical direction, then after passing through the second flow collecting component 1155, the flow direction of the heat exchange fluid changes to be along the horizontal direction, and enters the second flow guide component 1154 extending along the horizontal direction.

[0153] In this embodiment, by additionally providing the second flow collecting component 1155, the second flow guide component 1154 and the flow channel outlet 11442 are connected and communicated, and the second flow collecting component 1155 plays a role of guiding flow, guiding flow and changing the flow direction of the heat exchange fluid.

[0154] In some embodiments, referring to FIG. 2, the battery device 1100 further comprises a box 1120 having an accommodation space 1113 inside, the box 1120 has a bottom surface, the battery cell assembly 1110 and the refrigerant heat exchange component 1140 are accommodated in the accommodation space 1113, and the refrigerant heat exchange component 1140 is arranged on the bottom surface.

[0155] For the box 1120, the box 1120 is used to accommodate the battery cell assembly 1110, and the box 1120 can comprise a first part 1121 and a second part 1122, the first part 1121 and the second part 1122 are overlapped with each other, and the first part 1121 and the second part 1122 jointly define the accommodation space 1113 for accommodating the battery cell assembly 1110. The first part 1121 can be a plate structure, and the second part 1122 can be a hollow structure with one end open. The first part 1121 is overlapped with the open side of the second part 1122 to jointly define the accommodation space 1113 with the second part 1122. Alternatively, the first part 1121 can also be a hollow structure with one side open. In this case, the second part 1122 can also be a hollow structure with one end open. The open side of the first part 1121 is overlapped with the open side of the second part 1122 to jointly define the accommodation space 1113 with the second part 1122. The box 1120 can have various shapes, such as a cylinder or a cuboid. The second part 1122 can comprise a frame 11221 and a bottom part 11222. The bottom part 11222 can be a plate structure, so it is also called a bottom plate. The frame 11221 is arranged around to form the side wall of the box 1120. The frame 11221 forms two openings at the top and bottom. The bottom part 11222 is connected to the bottom opening of the frame 11221, and the second part 1122 is connected to the top opening of the frame 11221.

[0156] Generally, the battery device 1100 is placed horizontally, so the bottom plate is horizontal. The refrigerant heat exchange component 1140 can be placed on the bottom plate. In this case, the refrigerant heat exchange component 1140 can be a plate. The upper surface of the refrigerant heat exchange component 1140 forms a heat exchange surface 1143. The bottom surface of each battery cell in the battery cell assembly 1110 abuts against the heat exchange surface 1143. The refrigerant heat exchange component 1140 can also support and hold the battery cell assembly 1110.

[0157] In this embodiment, the refrigerant heat exchange component 1140 is placed on the bottom part 11222 of the box 1120, so that the bottom of the battery cell assembly 1110 is heat exchanged. The heat exchange surface 1143 is large, which is conducive to improving the heat exchange efficiency.

[0158] In some embodiments, referring to FIG. 3, the battery device 1100 further comprises a box body 1130, and the refrigerant heat exchange component 1140 is connected to the box body 1130 and cooperates with the box body 1130 to define a containing space 1113, and the battery cell assembly 1110 is contained in the containing space 1113, and the refrigerant heat exchange component 1140 can be used to support the battery cell assembly 1110.

[0159] Specifically, the box body 1130 can comprise a cover body 1131 and a box frame 1132, the cover body 1131 and the box frame 1132 are overlapped with each other, and the cover body 1131, the box frame 1132 and the refrigerant heat exchange component 1140 cooperatively define the containing space 1113 for containing the battery cell assembly 1110. Wherein, the cover body 1131 can be a plate structure, and the box frame 1132 can be a hollow structure with two open ends, for example, the box frame 1132 is a ring frame structure, the cover body 1131 is overlapped with one open end of the box frame 1132, the refrigerant heat exchange component 1140 is connected to the other open end of the box frame 1132, and the cover body 1131 can be arranged opposite to the refrigerant heat exchange component 1140. The box body 1130 can be in various shapes, such as a cylinder, a cuboid, etc.

[0160] In the present embodiment, the refrigerant heat exchange component 1140 can be connected to the box body 1130, and the refrigerant heat exchange component 1140 can form a box bottom plate, so that the battery cell assembly 1110 can be supported while heat exchanging with the battery cell assembly 1110, which is conducive to simplifying the structure of the external box body 1130 and reducing the weight of the battery device 1100.

[0161] In some embodiments, referring to FIG. 4 and FIG. 5, along the direction Y of the symmetry axis, the heat exchange surface 1143 has an edge region 1146, and the joint assembly 1150 is arranged in the edge region 1146.

[0162] Specifically, the edge region 1146 is a position close to the edge of the heat exchange surface 1143, for example, defining the length direction of the heat exchange surface 1143 as the direction Y of the symmetry axis, and the width direction of the heat exchange surface 1143 as the direction perpendicular to the direction Y of the symmetry axis, then, the edge region 1146 is formed at one end of the heat exchange surface 1143 along the length direction and close to the edge position, and the joint component 1151, the first flow guide component 1152, the first current collecting component 1153, the second flow guide component 1154 and the second current collecting component 1155 in the joint assembly 1150 are all located in the edge region 1146.

[0163] The battery cell assembly 1110 abuts on the heat exchange surface 1143 and avoids the edge region 1146, so that the joint assembly 1150 can avoid the battery cell assembly 1110, and the joint assembly 1150 and the battery cell assembly 1110 are not easy to interfere with each other.

[0164] In this embodiment, each component in the joint assembly 1150 is arranged on the edge region 1146 of the heat exchange surface 1143, which is advantageous for avoiding the joint assembly 1150 from the battery monomer assembly 1110, so that the heat exchange surface 1143 between the heat exchange surface 1143 and the battery monomer assembly 1110 can be relatively increased, so as to protect the heat exchange efficiency of the refrigerant heat exchange component 1140.

[0165] In one specific embodiment, referring to FIGS. 3-11, the battery device 1100 comprises a battery cell assembly 1110, a refrigerant heat exchange component 1140, and a joint assembly 1150, wherein the refrigerant heat exchange component 1140 has a heat exchange surface 1143 proximate or in contact with the battery cell, the heat exchange surface 1143 has a symmetry axis 1145, the refrigerant heat exchange component 1140 has a heat exchange flow channel 1144 inside, the heat exchange flow channel 1144 is symmetrically arranged on both sides of the symmetry axis 1145, the heat exchange surface 1143 is provided with a flow channel inlet 11441 communicating with the heat exchange flow channel 1144, and the flow channel inlet 11441 is symmetrically arranged about the symmetry axis 1145; the joint assembly 1150 comprises a joint component 1151 and a first flow guide component 1152 communicating with the joint component 1151, the joint component 1151 is connected to the refrigerant heat exchange component 1140 and arranged away from the symmetry axis 1145, the joint component 1151 is connected to the refrigerant heat exchange component 1140 through the first flow guide component 1152 and communicates with the flow channel inlet 11441; the joint assembly 1150 is arranged to avoid the battery cell assembly 1110; the joint assembly 1150 further comprises a first flow collecting component 1153 connected between the refrigerant heat exchange component 1140 and the first flow guide component 1152 for connecting the first flow guide component 1152 and the flow channel inlet 11441; the first flow collecting component 1153 has a flow collecting channel 11531 inside, the flow collecting channel 11531 comprises a flow collecting inlet section 11532 and two flow collecting outlet sections 11533 each communicating with the flow collecting inlet section 11532, the flow collecting inlet section 11532 or a position communicating between the flow collecting inlet section 11532 and the flow collecting outlet sections 11533 has a flow uniformizing channel wall 11534 arranged to conform to the flow of the refrigerant, the two flow collecting outlet sections 11533 are arranged on the front and back sides of the flow uniformizing channel wall 11534 respectively, and one end of the flow uniformizing channel wall 11534 close to the flow collecting outlet section 11533 is inclined towards the flow collecting outlet section 11533 close to the front side; the flow collecting inlet section 11532 communicates with the first flow guide component 1152, and the two flow collecting outlet sections 11533 each communicate with the flow channel inlet 11441; the first flow guide component 1152 has a first flow guide channel 11521 formed inside, and one or more first protruding structures 11522 are provided on the channel wall surface of the first flow guide channel 11521; the first flow guide channel 11521 has a first central axis, and the first protruding structures 11522 are arranged to extend spirally around the first central axis; the joint assembly 1150 further comprises a first heat preservation structure 1156 wrapped on the outer surface of the first flow guide component 1152.The joint assembly 1150 further comprises a second flow guide component 1154 in communication with the joint component 1151, the heat exchange surface 1143 is provided with a flow channel outlet 11442 in communication with the heat exchange flow channel 1144, the second flow guide component 1154 is connected with the refrigerant heat exchange component 1140 and in communication with the flow channel outlet 11442; the second flow guide component 1154 forms a second flow guide channel 11541 inside, and one or more second protruding structures 11542 are protruded on the channel wall surface of the second flow guide channel 11541; the joint assembly 1150 further comprises a second heat preservation structure 1157, which is wrapped on the outer surface of the second flow guide component 1154; the joint assembly 1150 further comprises a second current collecting component 1155 connected between the refrigerant heat exchange component 1140 and the second flow guide component 1154, so as to connect the second flow guide component 1154 with the flow channel outlet 11442.

[0166] According to some embodiments of the present application, the present application further provides a refrigerant heat exchange device, which comprises the refrigerant heat exchange component 1140 and the joint assembly 1150 in the battery device according to any of the above embodiments.

[0167] The refrigerant heat exchange device in the present application is based on the above-mentioned example of the battery device 1100, and the example of the refrigerant heat exchange device contains all the technical effects of the above-mentioned example of the battery device 1100, which will not be repeated here.

[0168] According to some embodiments of the present application, the present application further provides an energy storage device, which comprises the power conversion device and the energy storage device in the above-mentioned embodiments, and the power conversion device is used for electrically connecting the power generation device and the energy storage device.

[0169] Specifically, the energy storage device can comprise one or more battery clusters to improve the voltage and capacity of the energy storage device. The battery cluster can comprise a plurality of battery devices 1100, and the plurality of battery devices 1100 are connected in series through the current collecting component to improve the voltage of the energy storage device. When the energy storage device comprises a plurality of battery clusters, the plurality of battery clusters are connected in parallel to improve the capacity of the energy storage device.

[0170] The energy storage device can be used in energy storage power stations, wind power systems, solar power systems, mobile power systems or temporary power supply systems, etc. The energy storage device can store electrical energy as needed and output electrical energy at appropriate times. For example, the energy storage device can store electrical energy during the off-peak period of electricity consumption, and provide electrical energy for related users or electrical equipment during the peak period of electricity consumption. The energy storage system provided in the embodiments of the present application can be any power system that needs to use the energy storage device.

[0171] In some embodiments, the energy storage device is an energy storage container or an energy storage cabinet.

[0172] In some embodiments, the energy storage device can include a cabinet and one or more battery clusters, the battery clusters being housed in the cabinet.

[0173] In some embodiments, the energy storage device can include a thermal management module, a master control module, a general control module, a power distribution module, a fire control module, and the like.

[0174] As an example, the thermal management module can include a liquid cooling unit that provides cooling liquid to each battery device 1100 through a pipeline for adjusting the temperature of the battery monomer.

[0175] As an example, the master control module can serve as a battery management unit of the battery cluster for monitoring and managing the battery cluster. The master control module can monitor information such as current, voltage, power, or temperature of the battery cluster. For example, the charging and discharging current, voltage, and the like of the battery cluster can be controlled. The master control module includes a slave battery management unit SBMU (SBMU), a fusion switch, and the like.

[0176] As an example, the general control module can serve as a battery management unit of the energy storage device for monitoring and managing the energy storage device. The general control module can monitor information such as current, voltage, power, state of charge, or temperature of the energy storage device. For example, the charging and discharging current, voltage, and the like of the energy storage device can be controlled. As an example, the general control module includes an insulation monitoring module IMM (IMM), a master battery management unit MBMU (MBMU), an Ethernet ETH (ETH), and an optical fiber conversion module, and the like.

[0177] As an example, the fire control module includes a control panel, a detector, an alarm device, and the like, for detecting, alarming, or extinguishing the energy storage system.

[0178] As an example, the power distribution module can be used to distribute power to the modules that need power in the energy storage device.

[0179] According to some embodiments of the present application, the present application also provides an energy storage system, which includes a power conversion device and an energy storage device in the above embodiments, the power conversion device being used to electrically connect a power generation device and the energy storage device.

[0180] In some embodiments, the energy storage system can include one or more energy storage devices and a power converter system (PCS) connected between the power generation device and the energy storage devices. The power generation device is configured to generate electric energy, and the electric energy generated by the power generation device can be stored in the energy storage devices through the power converter system. As an example, the power generation device can be a solar panel, a hydroelectric power generation device, a fire power generation device, a wind power generation device, etc. The specific type of the power generation device is not limited in the present application.

[0181] According to some embodiments of the present application, referring to FIG. 1, the present application also provides a power consumption device, which includes the battery device 1100 in the above embodiments, the energy storage device in the above embodiments, or the energy storage system in the above embodiments, and the battery device 1100 is configured to store or provide electric energy.

[0182] The technical solutions described in the embodiments of the present application are applicable to various power consumption devices using battery cells, such as mobile phones, portable devices, notebook computers, electric vehicles, electric toys, electric tools, vehicles 1000, ships, and spacecraft, such as aircraft, rockets, space shuttles, and spacecraft.

[0183] The example of the power consumption device in the present application is based on the example of the battery device 1100 described above, and the example of the power consumption device contains all the technical effects of the example of the battery device 1100 described above, which will not be repeated here.

[0184] According to some embodiments of the present application, the present application also provides a charging network, which includes a charging pile and the energy storage device in the above embodiments or the energy storage system in the above embodiments, and the energy storage device is configured to provide electric energy for the charging pile.

[0185] For example, the charging network includes a charging pile and an energy storage device, the charging pile is electrically connected with the energy storage device, and the energy storage device is configured to provide electric energy for the charging pile. The charging pile and the battery device 1100 in the energy storage device are electrically connected through a cable, and the battery device 1100 can provide the electric energy stored therein to the charging pile. The charging pile has one or more connectors configured to be connected with a power consumption device (such as a vehicle 1000), so as to charge the power consumption device.

[0186] The energy storage device can be located inside the charging pile (such as a charging and storage integrated machine) or outside the charging pile.

[0187] The above merely describes preferred embodiments of the present application, and only specifically describes the technical principles of the present application, and these descriptions are only for explaining the principles of the present application, and cannot be explained as limitations on the protection scope of the present application in any way. Based on the explanations here, any modifications, equivalent replacements and improvements made within the spirit and principles of the present application, and other specific embodiments of the present application that can be thought of by those skilled in the art without creative labor, should be included in the protection scope of the present application.

Claims

1. A battery device (1100) characterized by, The application relates to a battery cell assembly (1110) and a refrigerant heat exchange component (1140) having a heat exchange surface (1143) close to or in contact with the battery cell, the heat exchange surface (1143) having an axis of symmetry (1145), the refrigerant heat exchange component (1140) having a heat exchange flow channel (1144) inside the refrigerant heat exchange component (1140), the heat exchange flow channel (1144) being symmetrically arranged on both sides of the axis of symmetry (1145), the heat exchange surface (1143) being provided with a flow channel inlet (11441) in communication with the heat exchange flow channel (1144), the flow channel inlet (11441) being symmetrically arranged about the axis of symmetry (1145). The application also relates to a joint assembly (1150) comprising a joint component (1151) and a first flow guide component (1152) in communication with the joint component (1151), the joint component (1151) being connected to the refrigerant heat exchange component (1140) and arranged away from the axis of symmetry (1145), the joint component (1151) being connected to the refrigerant heat exchange component (1140) through the first flow guide component (1152) and in communication with the flow channel inlet (11441), the joint assembly (1150) being arranged to avoid the battery cell assembly (1110). The joint assembly (1150) further comprises a first flow collecting component (1153) connected between the refrigerant heat exchange component (1140) and the first flow guide component (1152) for connecting the first flow guide component (1152) to the flow channel inlet (11441). The first flow collecting component (1153) has a flow collecting channel (11531) inside the first flow collecting component (1153), the flow collecting channel (11531) comprising a flow collecting inlet section (11532) and two flow collecting outlet sections (11533) in communication with the flow collecting inlet section (11532), the flow collecting inlet section (11532) being provided with a uniform flow channel wall (11534) inside the flow collecting inlet section (11532) or at a position where the flow collecting inlet section (11532) is in communication with the flow collecting outlet sections (11533), the uniform flow channel wall (11534) being arranged to be in contact with the flow switching fluid, the two flow collecting outlet sections (11533) being arranged on the front and back sides of the uniform flow channel wall (11534) respectively, one end of the uniform flow channel wall (11534) close to the flow collecting outlet section (11533) being arranged to be inclined towards the flow collecting outlet section (11533) on the front side, the flow collecting inlet section (11532) being in communication with the first flow guide component (1152), and the two flow collecting outlet sections (11533) being in communication with the flow channel inlet (11441).

2. The battery device (1100) of claim 1, wherein, The inclination angle (a) of the uniform flow channel wall (11534) ranges from greater than 0° to less than 90°.

3. The battery device (1100) of claim 2, wherein, ​ 4. The battery device (1100) of claim 3, wherein, ​ 5. The battery device (1100) according to any one of claims 1-4, characterized in that, The first flow guide component (1152) has a first flow channel (11521) formed inside, and one or more first protruding structures (11522) are protruded on the channel wall surface of the first flow channel (11521).

6. The battery device (1100) of claim 5, wherein, The first flow channel (11521) has a first central axis, and the first protruding structure (11522) extends along the length direction of the first flow channel (11521) and is arranged obliquely relative to the first central axis.

7. The battery device (1100) of claim 5, wherein, The first flow channel (11521) has a first central axis, and the first protruding structure (11522) is arranged in a spiral extending manner around the first central axis.

8. The battery device (1100) according to any one of claims 1-4, characterized by The joint assembly (1150) further comprises a first heat preservation structure (1156) wrapped on the outer surface of the first flow guide component (1152).

9. The battery device (1100) according to any one of claims 1-4, characterized by The first flow guide component (1152) is arranged in a preset direction, and the preset direction is arranged at a preset included angle (β) with the direction (Y) of the symmetry axis, and the preset included angle (β) ranges from greater than 0° to less than or equal to 90°.

10. The battery device (1100) according to any one of claims 1-4, characterized by The joint assembly (1150) further comprises a second flow guide component (1154) connected to the joint component (1151), and the heat exchange surface (1143) is provided with a flow channel outlet (11442) connected to the heat exchange flow channel (1144), and the second flow guide component (1154) is connected to the refrigerant heat exchange component (1140) and connected to the flow channel outlet (11442).

11. The battery device (1100) of claim 10, wherein, The second flow guide component (1154) has a second flow channel (11541) formed inside, and one or more second protruding structures (11542) are protruded on the channel wall surface of the second flow channel (11541).

12. The battery device (1100) of claim 11, wherein, The second flow channel (11541) has a second central axis, and the second protruding structure (11542) extends along the length direction of the second flow channel (11541) and is arranged obliquely relative to the second central axis.

13. The battery device (1100) of claim 12, wherein, The second protruding structure (11542) is arranged in a spiral extending manner around the second central axis.

14. The battery apparatus (1100) of claim 10, wherein, The joint assembly (1150) further comprises a second heat preservation structure (1157) wrapped on the outer surface of the second flow guide component (1154).

15. The battery apparatus (1100) of claim 10, wherein, The joint assembly (1150) further comprises a second flow collecting component (1155) connected between the refrigerant heat exchange component (1140) and the second flow guide component (1154), so as to connect the second flow guide component (1154) and the flow channel outlet (11442).

16. The battery device (1100) according to any one of claims 1-4, characterized by The battery device (1100) further comprises a box body (1120) having a containing space (1113), and the battery monomer assembly (1110) is contained in the containing space (1113), and the refrigerant heat exchange component (1140) is located in the containing space (1113) and arranged on the box bottom (11222) of the box body (1120), so as to support the battery monomer assembly (1110).

17. The battery device (1100) according to any one of claims 1-4, characterized by The battery device (1100) further comprises a box body (1130), the refrigerant heat exchange component (1140) is connected to the box body (1130) and cooperatively enclosed with the box body (1130) to form a containing space (1113), the battery cell assembly (1110) is contained in the containing space (1113), and the refrigerant heat exchange component (1140) can be used to support the battery cell assembly (1110).

18. The battery device (1100) according to any one of claims 1-4, characterized by In the direction (Y) of the symmetry axis, the heat exchange surface (1143) has an edge region (1146), and the joint assembly (1150) is arranged at the edge region (1146).

19. A refrigerant heat exchange device characterized by comprising: The refrigerant heat exchange component (1140) and the joint assembly (1150) in the battery device (1100) as claimed in any one of claims 1-18.

20. An electrical device, comprising: The battery device (1100) as claimed in any one of claims 1-18 is used for storing or providing electric energy.

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