Battery device, heat exchange assembly and electric equipment

Abstract

The utility model belongs to the technical field of batteries, and particularly relates to a battery device, a heat exchange assembly and electric equipment. The battery device comprises a heat exchange assembly and at least one battery monomer, the heat exchange assembly comprises a heat exchange tube, a first current collector and a second current collector, the heat exchange tube comprises a plurality of straight sections and at least one bent section, any two adjacent straight sections are connected and communicated through the bent section, and the first current collector is connected with the second current collector through the bent section. The heat exchange tube is configured to be capable of exchanging heat with the single batteries, a refrigerant medium flow channel is formed in the heat exchange tube, a first port and a second port which are communicated with the refrigerant medium flow channel are formed in the two ends of the heat exchange tube respectively, and the first current collector and the second current collector are of a split structure and are jointly arranged on the same side of the heat exchange tube; the first current collector is communicated with the first port, and the second current collector is communicated with the second port. According to the battery device, the refrigerant medium can improve the heat exchange effect of the refrigerant medium on the battery monomers.

Description

Technical Field

[0001] This application belongs to the technical field of batteries, and specifically relates to a battery device, a heat exchange component, and an electrical device. Background Art

[0002] During the charging and discharging process of a battery, heat is generated. If the heat cannot be dissipated in time, it may cause the battery temperature to be too high, affecting the performance, lifespan, and even safety of the battery. Moreover, it may lead to significant potential safety hazards during the use of the battery, which is not conducive to the use safety of consumers.

[0003] In the prior art, a heat exchange component is generally used for heat exchange with a battery cell to solve the heat dissipation problem of the battery cell. However, there is a problem of heat exchange between the liquid inlet collector and the liquid outlet collector of the heat exchange component, which causes the temperature of the refrigerant medium inside the liquid inlet collector to increase, thereby reducing the heat exchange effect of the heat exchange component on the battery cell. Summary of the Utility Model

[0004] In view of the defects existing in the prior art, the purpose of this application is to provide a battery device, a heat exchange component, and an electrical device, which can effectively solve the problem of heat exchange between the liquid inlet collector and the liquid outlet collector.

[0005] In a first aspect, this application provides a battery device, which includes:

[0006] At least one battery cell;

[0007] A heat exchange component, which includes a heat exchange tube, a first collector, and a second collector. The heat exchange tube includes a plurality of straight sections and at least one bent section. Any two adjacent straight sections are connected and communicated through the bent section. The heat exchange tube is configured to be able to perform heat exchange with the battery cell. A refrigerant medium flow channel is formed inside the heat exchange tube. A first port and a second port that are communicated with the refrigerant medium flow channel are respectively formed at both ends of the heat exchange tube. The first collector and the second collector are of a split structure and are commonly arranged on the same side of the heat exchange tube. Among them, the first collector is communicated with the first port, and the second collector is communicated with the second port.

[0008] According to the battery device of this application, by performing heat exchange between the heat exchange tube and the battery cell, the temperature of the battery cell can be adjusted through the refrigerant medium in the refrigerant medium flow channel. When it is necessary to cool and dissipate the heat of the battery cell, one of the first collector and the second collector serves as the liquid inlet collector, and the other serves as the liquid outlet collector. By adopting a split structure design for the first collector and the second collector, compared with the integrated liquid inlet collector and liquid outlet collector, the heat exchange between the first collector and the second collector can be reduced, thereby reducing the influence on the temperature of the refrigerant medium inside the first collector or the second collector, and improving the heat exchange effect of the refrigerant medium on the battery cell.

[0009] In some embodiments of the present application, a heat insulation layer is provided between the first current collector and the second current collector.

[0010] By providing a heat insulation layer between the first current collector and the second current collector, the heat insulation layer can effectively reduce the heat exchange between the first current collector and the second current collector, thereby reducing the influence on the temperature of the refrigerant medium in the first current collector or the second current collector, and improving the heat exchange effect of the refrigerant medium on the battery cell.

[0011] In some embodiments of the present application, at least one of the first current collector and the second current collector is externally coated with a heat insulation layer.

[0012] By externally coating the first current collector with a heat insulation layer, the heat exchange between the first current collector and the outside can be reduced, thereby reducing the influence of the outside temperature on the temperature of the refrigerant medium in the first current collector, or reducing the influence of the temperature of the refrigerant medium in the first current collector on the outside temperature; and / or, by externally coating the second current collector with a heat insulation layer, the heat exchange between the second current collector and the outside can be reduced, thereby reducing the influence of the outside temperature on the temperature of the refrigerant medium in the second current collector, or reducing the influence of the temperature of the refrigerant medium in the second current collector on the outside temperature.

[0013] In some embodiments of the present application, at least one of the first current collector and the second current collector is a heat insulation member.

[0014] By setting the first current collector as a heat insulation member, the heat exchange between the first current collector and the outside can be reduced, thereby reducing the influence of the outside temperature on the temperature of the refrigerant medium in the first current collector, or reducing the influence of the temperature of the refrigerant medium in the first current collector on the outside temperature; and / or, by setting the second current collector as a heat insulation member, the heat exchange between the second current collector and the outside can be reduced, thereby reducing the influence of the outside temperature on the temperature of the refrigerant medium in the second current collector, or reducing the influence of the temperature of the refrigerant medium in the second current collector on the outside temperature.

[0015] In some embodiments of the present application, the heat exchange assembly further includes a limiting member, the first current collector and the second current collector are respectively connected to the limiting member, and the first current collector and the second current collector are configured to be fixed in relative position under the constraint of the limiting member.

[0016] By fixing the first current collector and the second current collector with the limiting member, the relative displacement between the first current collector and the second current collector can be reduced, facilitating the maintenance of the relative position of the first current collector and the second current collector, and thus facilitating the installation and adjustment of the pipeline.

[0017] In some embodiments of the present application, the limiting member includes a first mounting groove, a second mounting groove, and a limiting protrusion arranged between the first mounting groove and the second mounting groove, part of the first current collector is arranged in the first mounting groove, part of the second current collector is arranged in the second mounting groove, and the first current collector and the second current collector are spaced apart by the limiting protrusion.

[0018] By placing part of the first current collector in the first mounting groove and part of the second current collector in the second mounting groove, it is convenient to fix the relative positions of the first current collector and the second current collector, and the first current collector and the second current collector are separated by the limiting protrusion, thereby reducing the phenomenon of the first current collector and the second current collector being in contact with each other and exchanging heat, thereby reducing the impact on the temperature of the coolant in the first current collector or the second current collector, and improving the heat exchange effect of the coolant on the battery cell.

[0019] In some embodiments of the present application, the first port and the second port are respectively arranged on one side of the heat exchange tube along the first direction, the first current collector and the second current collector are respectively extended along the second direction and are commonly arranged on one side of the heat exchange tube along the first direction, and the first current collector and the second current collector are arranged along the first direction, wherein the first direction is one of the length direction and the width direction of the battery device, and the second direction is the other of the length direction and the width direction of the battery device.

[0020] By arranging the first current collector and the second current collector on one side of the heat exchange tube along the first direction, it is convenient to operate the first current collector and the second current collector respectively through the same side of the heat exchange component, thereby facilitating the installation and adjustment of the pipeline.

[0021] In some embodiments of the present application, there are multiple heat exchange tubes, and the multiple heat exchange tubes are arranged along the second direction, and the first port of any heat exchange tube is respectively connected to the first collector, and the second port of any heat exchange tube is respectively connected to the second collector.

[0022] By providing a plurality of heat exchange tubes, the plurality of heat exchange tubes can respectively exchange heat with the battery cells, thereby improving the heat exchange efficiency of the battery device, and by connecting any heat exchange tube to the first current collector and the second current collector respectively, the setting of the connecting pipelines can be reduced.

[0023] In some embodiments of the present application, the number of heat exchange tubes is two, the two heat exchange tubes are arranged along the second direction, the first current collector is arranged on the side of the second current collector away from the heat exchange tube along the first direction, and the two ends of the first current collector along the second direction are respectively arranged beyond the end of the second current collector, and the first ports of the two heat exchange tubes are respectively connected to the two ends of the first current collector.

[0024] By arranging both ends of the first current collector along the second direction to extend beyond the ends of the second current collector, it is convenient for the first port of the heat exchange tube to communicate with the first current collector through both ends of the first current collector, and the second port of the heat exchange tube communicates with the second current collector, so that the first port and the second port are arranged offset along the second direction, and further it is convenient for the heat exchange tube to communicate with the first current collector and the second current collector respectively.

[0025] In some embodiments of the present application, a heat insulation layer is coated on the outer part of a partial tube section of the heat exchange tube near the first port, and / or a heat insulation layer is coated on the outer part of a partial tube section of the heat exchange tube near the second port.

[0026] By coating a heat insulation layer on the outer part of a partial tube section of the heat exchange tube near the first port, the heat exchange between the partial tube section of the heat exchange tube near the first port and the outside can be reduced, thereby reducing the influence of the outside temperature on the temperature of the refrigerant medium in the partial tube section near the first port, or reducing the influence of the refrigerant medium in the partial tube section near the first port on the outside temperature; by coating a heat insulation layer on the outer part of a partial tube section of the heat exchange tube near the second port, the heat exchange between the partial tube section of the heat exchange tube near the second port and the outside can be reduced, thereby reducing the influence of the outside temperature on the temperature of the refrigerant medium in the partial tube section near the second port, or reducing the influence of the refrigerant medium in the partial tube section near the second port on the outside temperature.

[0027] In some embodiments of the present application, the heat exchange assembly further includes a first joint and a second joint. The first joint is arranged on one side of the first current collector along the third direction and communicates with the first current collector. The second joint is arranged on one side of the second current collector along the third direction and communicates with the second current collector, wherein the third direction is the height direction of the battery device.

[0028] By arranging the first joint on one side of the first current collector along the height direction of the battery device and arranging the second joint on one side of the second current collector along the height direction of the battery device, the space occupied by the first joint and the second joint along the length direction or the width direction of the battery device can be reduced, thereby facilitating increasing the size of the heat exchange tube along the length direction or the width direction, and thus improving the heat exchange effect of the heat exchange tube.

[0029] In some embodiments of the present application, the first joint and the second joint are arranged at intervals, and the minimum interval size between the first joint and the second joint is greater than or equal to 45 mm.

[0030] By setting the minimum interval size between the first joint and the second joint to be greater than or equal to 45 mm, the interval size between the first joint and the second joint can be increased, thereby reducing the heat exchange between the first joint and the second joint, and further reducing the influence on the temperature of the refrigerant medium in the first joint or the second joint.

[0031] In some embodiments of the present application, the number of battery cells is multiple, at least some of the battery cells are arranged along a first direction, and / or at least some of the battery cells are arranged along a second direction. The heat exchange tube is disposed on one side of the battery cells along a third direction, where the first direction is one of the length direction and the width direction of the battery device, the second direction is the other of the length direction and the width direction of the battery device, and the third direction is the height direction of the battery device.

[0032] By arranging at least some of the battery cells along the first direction, and / or arranging at least some of the battery cells along the second direction, and disposing the heat exchange tube on one side of the battery cells along the third direction, heat exchange can be carried out between a single heat exchange tube and multiple battery cells, thereby improving the heat exchange efficiency of the heat exchange tube and reducing the number of heat exchange tubes.

[0033] A second aspect of the present application provides a heat exchange assembly, which includes:

[0034] A heat exchange tube, which includes a plurality of straight sections and at least one bent section. Any two adjacent straight sections are connected and communicated through the bent section. The heat exchange tube is configured to be capable of heat exchange with the battery cell. A refrigerant medium flow channel is formed inside the heat exchange tube, and a first port and a second port that are communicated with the refrigerant medium flow channel are respectively formed at two ends of the heat exchange tube;

[0035] A first current collector and a second current collector, the first current collector and the second current collector are of a split structure and are commonly disposed on the same side of the heat exchange tube. Among them, the first current collector is communicated with the first port, and the second current collector is communicated with the second port.

[0036] According to the heat exchange assembly of the present application, the temperature of the battery cell can be adjusted by the refrigerant medium in the refrigerant medium flow channel. When it is necessary to cool and dissipate heat from the battery cell, one of the first current collector and the second current collector serves as the liquid inlet current collector, and the other serves as the liquid outlet current collector. By designing the first current collector and the second current collector to be of a split structure, compared with the integral liquid inlet current collector and liquid outlet current collector, the heat exchange between the first current collector and the second current collector can be reduced, thereby reducing the influence on the temperature of the refrigerant medium in the first current collector or the second current collector, and improving the heat exchange effect of the refrigerant medium on the battery cell.

[0037] In some embodiments of the present application, a heat insulation layer is provided between the first current collector and the second current collector;

[0038] and / or at least one of the first current collector and the second current collector is externally coated with a heat insulation layer;

[0039] and / or at least one of the first current collector and the second current collector is a heat insulation member.

[0040] By providing a heat insulation layer between the first current collector and the second current collector, the heat insulation layer can effectively reduce the heat exchange between the first current collector and the second current collector, thereby reducing the influence on the temperature of the refrigerant medium in the first current collector or the second current collector, and improving the heat exchange effect of the refrigerant medium on the battery cell; by covering the outside of the first current collector with a heat insulation layer, it is possible to reduce the heat exchange between the first current collector and the outside world, thereby reducing the influence of the outside temperature on the temperature of the refrigerant medium in the first current collector, or reducing the influence of the temperature of the refrigerant medium in the first current collector on the outside temperature; and / or, by covering the outside of the second current collector with a heat insulation layer, it is possible to reduce the heat exchange between the second current collector and the outside world, thereby reducing the influence of the outside temperature on the temperature of the refrigerant medium in the second current collector, or reducing the influence of the temperature of the refrigerant medium in the second current collector on the outside temperature; by setting the first current collector as a heat insulation member, it is possible to reduce the heat exchange between the first current collector and the outside world, thereby reducing the influence of the outside temperature on the temperature of the refrigerant medium in the first current collector, or reducing the influence of the temperature of the refrigerant medium in the first current collector on the outside temperature; and / or, by setting the second current collector as a heat insulation member, it is possible to reduce the heat exchange between the second current collector and the outside world, thereby reducing the influence of the outside temperature on the temperature of the refrigerant medium in the second current collector, or reducing the influence of the temperature of the refrigerant medium in the second current collector on the outside temperature.

[0041] The third aspect of the present application proposes an electrical device having the battery device of any one of the above.

[0042] The above description is only an overview of the technical solution of the present application. In order to be able to understand the technical means of the present application more clearly, it can be implemented according to the content of the specification. And in order to make the above and other objects, features and advantages of the present application more obvious and understandable, the following specifically gives the specific embodiments of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] By reading the following detailed description of the preferred embodiments, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only for the purpose of showing the preferred embodiments and are not considered to be a limitation of the present application. And throughout the drawings, the same reference numerals are used to denote the same components. In the drawings:

[0044] Figure 1 is a schematic structural diagram of a vehicle provided by an embodiment of the present application;

[0045] Figure 2 is a schematic structural diagram of a battery device provided by an embodiment of the present application;

[0046] Figure 3 is a schematic structural diagram of a battery cell assembly provided by an embodiment of the present application;

[0047] Figure 4 It is a schematic exploded view of a battery cell provided by an embodiment of the present application;

[0048] Figure 5 It is a schematic structural view of a heat exchange component provided by an embodiment of the present application;

[0049] Figure 6 is Figure 5 The structural schematic view of the heat exchange component in after removing the heat insulation layer;

[0050] Figure 7 is Figure 5 The exploded structural schematic view of the heat exchange component in ;

[0051] Figure 8 is Figure 5 The enlarged structural schematic view of part A of the heat exchange component in ;

[0052] Figure 9 is Figure 6 The enlarged structural schematic view of part B of the heat exchange component in ;

[0053] Figure 10 is Figure 7 The structural schematic view of the limiting member in .

[0054] The reference numerals in the specific embodiments are as follows:

[0055] 1. Vehicle;

[0056] 10. Battery device; 11. Controller; 12. Motor;

[0057] 20. Battery cell assembly; 21. Battery cell; 211. End cap; 212. Housing; 213. Electrode assembly; 214. Electrode terminal;

[0058] 30. Box body; 301. First box body; 302. Second box body;

[0059] 40. Heat exchange component; 41. Heat exchange tube; 411. First port; 412. Second port; 413. Straight section; 414. Bent section; 42. First current collector; 43. Second current collector; 44. Heat insulation layer; 45. Limiting member; 451. Bottom plate part; 452. Side plate part; 453. Limiting protrusion; 454. First installation groove; 455. Second installation groove; 456. Extended end; 46. First joint; 47. Second joint.

[0060] X. First direction; Y. Second direction; Z. Third direction. Specific embodiments

[0061] The implementation manners of the technical solution of the present application will be described in detail below with reference to the accompanying drawings. The following implementation manners are only used to more clearly illustrate the technical solution of the present application, so they are only examples and cannot be used to limit the protection scope of the present application.

[0062] It should be noted that unless otherwise specified, the technical terms or scientific terms used in the implementation manners of the present application should have the ordinary meanings understood by those skilled in the art to which the implementation manners of the present application belong.

[0063] In the description of the implementation manners of the present application, the orientation or positional relationship indicated by technical terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the implementation manners of the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the implementation manners of the present application.

[0064] In addition, technical terms such as "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. In the description of the implementation manners of the present application, the meaning of "a plurality" includes two or more, unless otherwise specifically defined.

[0065] In the description of the implementation manners of the present application, unless otherwise clearly specified and limited, technical terms such as "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can also be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the implementation manners of the present application can be understood according to specific situations.

[0066] In the description of the implementation manners of the present application, unless otherwise clearly specified and limited, the first feature being "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on" the second feature can be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "below" and "beneath" the second feature can be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0067] At present, from the perspective of the development of the market situation, the application of power batteries is becoming more and more extensive. Power batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power, and solar power plants, but also widely used in electric transportation such as electric bicycles, electric motorcycles, and electric vehicles, as well as in many fields such as military equipment and aerospace. Lithium-ion batteries have been widely used in mobile and portable electrical appliances due to their advantages such as high energy density, high average open-circuit voltage, and long cycle life.

[0068] However, heat is generated during the charging and discharging process of the battery. If the heat cannot be dissipated in time, it may cause the battery temperature to be too high, affecting the performance, life, and even safety of the battery. Moreover, it may lead to significant potential safety hazards during the use of the battery, which is not conducive to the use safety of consumers.

[0069] In the prior art, a heat exchange component is generally used to exchange heat with the battery cell to solve the heat dissipation problem of the battery cell. However, there is a problem of heat exchange between the inlet liquid collector and the outlet liquid collector of the heat exchange component, which causes the temperature of the refrigerant medium inside the inlet liquid collector to change, and then reduces the heat exchange effect of the heat exchange component on the battery cell.

[0070] To effectively solve the problem of heat exchange between the inlet liquid collector and the outlet liquid collector, the present application proposes a battery device, a heat exchange component, and an electrical device having the battery device. According to the battery device, the heat exchange component, and the electrical device of the present application, the temperature of the battery cell can be adjusted by the refrigerant medium inside the heat exchange component, and the heat exchange between the inlet liquid collector and the outlet liquid collector can be reduced, thereby reducing the influence on the temperature of the refrigerant medium inside the inlet liquid collector or the outlet liquid collector, and improving the heat exchange effect of the refrigerant medium on the battery cell.

[0071] The battery device mentioned in the embodiments of the present application may include one or more battery cell assemblies for providing voltage and capacity. The battery cell assembly may include a plurality of battery cells, and the plurality of battery cells are connected in series, parallel, or in a hybrid connection through a busbar component.

[0072] In some embodiments, the battery cell assembly is usually formed by arranging a plurality of battery cells; as an example, the battery cell assembly may be a battery module, and the battery module is formed by arranging and fixing a plurality of battery cells to form an independent module. As an example, the battery module may be formed by bundling a plurality of battery cells with cable ties.

[0073] In some embodiments, the battery device may be a battery pack, and the battery pack includes a box body and one or more battery cell assemblies, and the battery cell assemblies are accommodated in the box body.

[0074] As an example, the battery cell assembly can be a battery module, and the battery cell assembly can be accommodated in the box by fixing the battery module in the box.

[0075] As an example, the battery cell assembly can also be accommodated in the box by directly fixing a plurality of battery cells to the box.

[0076] As an example, the box can include a first box body and a second box body. The first box body and the second box body are snapped together so that a closed space is formed inside the box to accommodate the battery cell assembly. Here, "closed" means covered or closed, which can be sealed or non-sealed. The first box body can be a top cover or a bottom plate.

[0077] As an example, the box can include a top cover, a frame, and a bottom plate. The top cover and the bottom plate are respectively connected to the frame so that a closed space is formed inside the box to accommodate the battery cell assembly.

[0078] As an example, the box can be part of the chassis structure of a vehicle. For example, the top cover of the box can become at least part of the floor of the vehicle, or the frame of the box can become at least part of the crossbeam and longitudinal beam of the vehicle.

[0079] In some embodiments, the battery device refers to an energy storage device, and the energy storage device includes a box, and at least one side of the box is provided with a door. The energy storage device includes an energy storage container, an energy storage cabinet, etc.

[0080] In some embodiments, the energy storage device includes one or more battery clusters to increase the voltage and capacity of the energy storage device. The battery cluster can include a plurality of battery modules, and the plurality of battery modules are connected in series through a busbar component to increase the voltage of the energy storage device. When the energy storage device includes a plurality of battery clusters, the plurality of battery clusters are connected in parallel to increase the capacity of the energy storage device.

[0081] The energy storage device can be used in an energy storage power station, a wind power generation system, a solar power generation system, a mobile power system, or a temporary power supply system, etc. The energy storage device can store electrical energy as needed and output electrical energy at an appropriate time. For example, the energy storage device can store electrical energy during a low electricity consumption period, and provide electrical energy to relevant users or electrical equipment during a high electricity consumption period. The energy storage system provided by the embodiments of the present application can be any power system that requires an energy storage device.

[0082] The technical solutions described in the embodiments of the present application are applicable to various electrical devices and energy storage devices using battery cells and battery devices, such as mobile phones, portable devices, laptop computers, battery cars, electric toys, electric tools, vehicles, ships, spacecrafts, and energy storage containers, etc. For example, spacecrafts include airplanes, rockets, space shuttles, and spaceships, etc.

[0083] Figure 1Schematic diagram of the structure of vehicle 1 provided for some embodiments of the present application. As Figure 1 shown, vehicle 1 can be a fuel vehicle, a gas vehicle or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery device 10 is provided inside vehicle 1. The battery device 10 can be arranged at the bottom, head or tail of vehicle 1. The battery device 10 can be used for power supply of vehicle 1. For example, the battery device 10 can be used as the operating power source of vehicle 1. Vehicle 1 can also include a controller 11 and a motor 12. The controller 11 is used to control the battery device 10 to supply power to the motor 12. For example, it is used for the working power requirements during the start, navigation and driving of vehicle 1.

[0084] In some embodiments of the present application, the battery device 10 can not only be used as the operating power source of vehicle 1, but also be used as the driving power source of vehicle 1, replacing or partially replacing fuel or natural gas to provide driving power for vehicle 1.

[0085] Figure 2 Schematic diagram of the structure of the battery device 10 according to an embodiment of the present application. Figure 3 Schematic diagram of the structure of the battery cell assembly 20 according to an embodiment of the present application. Combining Figure 2 and Figure 3 shown, in order to meet different power usage requirements, the battery device 10 can include a plurality of battery cells 21. The battery cell 21 refers to the smallest unit that makes up the battery device 10. The plurality of battery cells 21 can be connected in series and / or in parallel via electrode terminals for various application scenarios. Among them, the plurality of battery cells 21 can be connected in series, in parallel or in a hybrid connection. The hybrid connection means a combination of series and parallel connections.

[0086] Combining Figure 2 and Figure 3 shown, the battery device 10 can include a plurality of battery cell assemblies 20 and a box body 30. The plurality of battery cell assemblies 20 are accommodated inside the box body 30. The box body 30 is used to accommodate the battery cells 21 or the battery cell assemblies 20 to reduce the influence of liquid or other foreign objects on the charging or discharging of the battery cells 21. The box body 30 can be a simple three-dimensional structure such as a single cuboid, cylinder or sphere, or a complex three-dimensional structure composed of a combination of simple three-dimensional structures such as a cuboid, cylinder or sphere. The material of the box body 30 can be alloy materials such as aluminum alloy and ferroalloy, or polymer materials such as polycarbonate and polyisocyanurate foam plastic, or composite materials such as glass fiber reinforced epoxy resin.

[0087] In some embodiments, the box body 30 may include a first box body 301 and a second box body 302. The first box body 301 and the second box body 302 cover each other, and the first box body 301 and the second box body 302 jointly define a space for accommodating the battery cell 21. The second box body 302 may be a hollow structure with an open end, and the first box body 301 may be a plate-like structure. The first box body 301 covers the open side of the second box body 302 so that the first box body 301 and the second box body 302 jointly define a space for accommodating the battery cell 21. The first box body 301 and the second box body 302 may also both be hollow structures with an open side, and the open side of the first box body 301 covers the open side of the second box body 302.

[0088] The battery cell assembly 20 may include a plurality of battery cells 21. The plurality of battery cells 21 may first be connected in series, parallel, or in a hybrid connection to form the battery cell assembly 20, and then the plurality of battery cell assemblies 20 may be connected in series, parallel, or in a hybrid connection to form the battery device 10. The battery cell 21 may be in the shape of a cylinder, a flat body, a cuboid, or other shapes, and the embodiments of the present application are not limited thereto. Generally, the battery cells 21 are divided into three types according to the encapsulation method: cylindrical battery cells, square battery cells, and soft-pack battery cells, and the embodiments of the present application are not limited thereto. However, for the sake of concise description, the following embodiments will all take the square lithium-ion battery cell 21 as an example for illustration.

[0089] Figure 4 It is a schematic exploded view of the battery cell 21 provided in some embodiments of the present application. The battery cell 21 refers to the smallest unit that makes up the battery device 10. As Figure 4 , the battery cell 21 includes an end cap 211, a housing 212, and an electrode assembly 213.

[0090] The end cap 211 refers to a component that covers the open end of the housing 212 to isolate the internal environment of the battery cell 21 from the external environment. Without limitation, the shape of the end cap 211 may be adapted to the shape of the housing 212 to cooperate with the housing 212. Optionally, the end cap 211 may be made of a material with a certain hardness and strength (such as aluminum alloy). In this way, the end cap 211 is not easily deformed when being squeezed or collided, so that the battery cell 21 can have a higher structural strength and the safety performance can also be improved. Functional components such as electrode terminals 214 may be provided on the end cap 211. The electrode terminals 214 may be used for electrically connecting to the electrode assembly 213 to output or input the electrical energy of the battery cell 21. In some embodiments, a pressure relief mechanism for releasing the internal pressure when the internal pressure or temperature of the battery cell 21 reaches a threshold may also be provided on the end cap 211. In some embodiments, an insulating member may also be provided on the inner side of the end cap 211. The insulating member may be used to isolate the electrical connection components in the housing 212 from the end cap 211 to reduce the risk of short circuit. Exemplarily, the insulating member may be plastic, rubber, etc.

[0091] The housing 212 is a component for cooperating with the end cap 211 to form the internal environment of the battery cell 21. Among them, the formed internal environment can be used to accommodate the electrode assembly 213, the electrolyte (not shown in the figure), and other components. The housing 212 and the end cap 211 can be independent components. An opening can be provided on the housing 212, and the end cap 211 is covered at the opening to form the internal environment of the battery cell 21. Without limitation, the end cap 211 and the housing 212 can also be integrated. Specifically, the end cap 211 and the housing 212 can form a common connection surface before other components are put into the housing. When it is necessary to encapsulate the inside of the housing 212, the end cap 211 is then covered on the housing 212. The housing 212 can be of various shapes and sizes, such as cuboid, cylindrical, hexagonal prism, etc. Specifically, the shape of the housing 212 can be determined according to the specific shape and size of the electrode assembly 213. The material of the housing 212 can be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc.

[0092] The electrode assembly 213 is a component in the battery cell 21 where an electrochemical reaction occurs. The housing 212 can contain one or more electrode assemblies 213. The electrode assembly 213 is mainly formed by winding or laminating a positive electrode sheet and a negative electrode sheet, and a separator is usually provided between the positive electrode sheet and the negative electrode sheet. The parts of the positive electrode sheet and the negative electrode sheet with active materials constitute the main body of the electrode assembly 213, and the parts of the positive electrode sheet and the negative electrode sheet without active substances respectively constitute the electrode tabs (not shown in the figure). The positive electrode tab and the negative electrode tab can be located at one end of the main body together or at both ends of the main body respectively. During the charge and discharge process of the battery, the positive electrode active material and the negative electrode active material react with the electrolyte, and the electrode tabs are connected to the electrode terminals 214 to form an electric current loop.

[0093] Combined Figures 2 to 7 As shown, in some embodiments of the present application, the battery device 10 includes a heat exchange component 40 and at least one battery cell 21. The heat exchange component 40 includes a heat exchange tube 41, a first current collector 42, and a second current collector 43. The heat exchange tube 41 includes a plurality of straight sections 413 and at least one bent section 414. Any two adjacent straight sections 413 are connected and communicated through the bent section 414. The heat exchange tube 41 is configured to be able to exchange heat with the battery cell 21. A refrigerant medium flow channel is formed inside the heat exchange tube 41. A first port 411 and a second port 412 that are communicated with the refrigerant medium flow channel are respectively formed at both ends of the heat exchange tube 41. The first current collector 42 and the second current collector 43 are of a split structure and are commonly provided on the same side of the heat exchange tube 41. Among them, the first current collector 42 is communicated with the first port 411, and the second current collector 43 is communicated with the second port 412.

[0094] Specifically, the number of battery cells 21 can be multiple. Multiple battery cells 21 can form one or more battery cell assemblies 20. Any one of the battery cell assemblies 20 includes multiple battery cells 21 arranged along the first direction X or the second direction Y. Among them, the first direction X can be one of the length direction or the width direction of the battery device 10, and the second direction Y can be the other of the length direction or the width direction of the battery device 10, and the dimension of the battery device 10 along the length direction is greater than the dimension of the battery device 10 along the width direction. The battery device 10 further includes a height direction, and the height direction of the battery device 10 is generally the vertical direction. Optionally, the length direction of the heat exchange tube 41 can be consistent with the length direction of the battery device 10, the width direction of the heat exchange tube 41 can be consistent with the width direction of the battery device 10, and the thickness direction of the heat exchange tube 41 can be consistent with the height direction of the battery device 10. For the purpose of describing the direction, this application only takes the example that a partial number of battery cells 21 are arranged along the first direction X to form the battery cell assembly 20, and the first direction X is the length direction of the battery device 10.

[0095] The heat exchange tube 41 is configured to be able to perform heat exchange with the battery cell 21, including at least the following ways. The heat exchange tube 41 can be directly attached to and perform heat exchange with the battery cell 21, or there is a thermal conductive adhesive between the heat exchange tube 41 and the battery cell 21, and heat exchange is performed between the heat exchange tube 41 and the battery cell 21 through the thermal conductive adhesive, or the heat exchange tube 41 and the battery cell 21 are arranged at intervals, and heat exchange is performed between the heat exchange tube 41 and the battery cell 21 through air flow. Of course, the heat exchange between the heat exchange tube 41 and the battery cell 21 is not limited to the above several ways, and common heat exchange ways in the art can be used in the technical solution of this application.

[0096] The heat exchange tube 41 is a tubular structure, including multiple straight sections 413 and at least one bent section 414. Any one of the straight sections 413 extends along the first direction X, and the multiple straight sections 413 are arranged at intervals along the second direction Y, and two adjacent straight sections 413 along the second direction Y are connected and communicated through the bent section 414, so as to form a continuously bent tubular structure. Among them, a refrigerant medium flow channel is formed inside the heat exchange tube 41, and the refrigerant medium flow channel is used for circulating the refrigerant medium. The refrigerant medium includes but is not limited to chlorofluorocarbons or hydrocarbons, etc. The refrigerant medium flow channel sequentially passes through the interiors of the multiple straight sections 413 and at least one bent section 414, and respectively forms a first port 411 and a second port 412 at both ends in the extending direction of the heat exchange tube 41. Optionally, the first port 411 and the second port 412 can be respectively formed on the two outermost straight sections 413 of the heat exchange tube 41 along the second direction Y. During the heat exchange process between the battery cell 21 and the heat exchange tube 41, the refrigerant medium flows through the refrigerant medium flow channel and performs heat exchange with the battery cell 21 through the heat exchange tube 41, so as to adjust the temperature of the battery cell 21.

[0097] The first fluid collector 42 and the second fluid collector 43 are of a split structure and are jointly arranged on the same side of the heat exchange tube 41. Among them, the first fluid collector 42 and the second fluid collector 43 can be tubular structures respectively, including square tubular structures or circular tubular structures. Optionally, the first fluid collector 42 and the second fluid collector 43 are jointly arranged on one side of the heat exchange tube along the first direction X. Among them, one of the first fluid collector 42 and the second fluid collector 43 can be used as the liquid inlet collector, and the other can be used as the liquid outlet collector. First ports 411 and second ports 412 are respectively formed at both ends of the refrigerant medium flow channel. Among them, the first fluid collector 42 is communicated with the first port 411 of the refrigerant medium flow channel, and the second fluid collector 43 is communicated with the second port 412 of the refrigerant medium flow channel. For the convenience of description, in this application, only when the temperature of the battery cell 21 rises and cooling and heat dissipation are required, the first fluid collector 42 is used as the liquid inlet collector, the first port 411 is used as the liquid inlet end, and correspondingly, the second fluid collector 43 is used as the liquid outlet collector, and the second port 412 is used as the liquid outlet end as an example for illustration. When the temperature of the battery cell 21 is too low and the battery cell 21 needs to be heated up, the first fluid collector 42 can be used as the liquid outlet collector, the first port 411 can be used as the liquid outlet end, and correspondingly, the second fluid collector 43 can be used as the liquid inlet collector, and the second port 412 can be used as the liquid inlet end.

[0098] In the present application, the heat exchange mode between the heat exchange tube 41 and the battery cell 21 is direct cooling with a refrigerant medium. Compared with the heat exchange mode of liquid cooling between the heat exchange tube 41 and the battery cell 21, the heat exchange speed of the direct cooling mode with the refrigerant medium is faster, and the phase change temperature difference of the refrigerant during the heat exchange process is large, resulting in a large temperature difference between the first fluid collector 42 and the second fluid collector 43. In order to reduce the temperature influence of the first fluid collector 42 on the refrigerant medium in the second fluid collector 43, or reduce the temperature influence of the second fluid collector 43 on the refrigerant medium in the first fluid collector 42, the first fluid collector 42 and the second fluid collector 43 are separately arranged.

[0099] According to the battery device 10 of the present application, by exchanging heat between the heat exchange tube 41 and the battery cell 21, the temperature of the battery cell 21 can be adjusted through the refrigerant medium in the refrigerant medium flow channel. When the battery cell 21 needs to be cooled and dissipated, one of the first fluid collector 42 and the second fluid collector 43 is used as the liquid inlet collector, and the other is used as the liquid outlet collector. By adopting a split structure design for the first fluid collector 42 and the second fluid collector 43, compared with the integral liquid inlet collector and liquid outlet collector, the heat exchange between the first fluid collector 42 and the second fluid collector 43 can be reduced, thereby reducing the influence on the temperature of the refrigerant medium in the first fluid collector 42 or the second fluid collector 43, and improving the heat exchange effect of the refrigerant medium on the battery cell 21.

[0100] Combined with Figures 5 to 9As shown, in some embodiments of the present application, a heat insulation layer 44 is provided between the first current collector 42 and the second current collector 43.

[0101] Specifically, the heat insulation layer 44 can be arranged between the first current collector 42 and the second current collector 43 along the arrangement direction thereof, so as to reduce the heat exchange between the first current collector 42 and the second current collector 43 along the arrangement direction through the blocking effect of the heat insulation layer 44. Optionally, the heat insulation layer 44 includes but is not limited to a heat preservation member or a heat radiation prevention member. Among them, the heat preservation member includes but is not limited to a foamed cotton layer or an aerogel layer. The heat radiation prevention member includes but is not limited to an aluminum foil layer.

[0102] By providing the heat insulation layer 44 between the first current collector 42 and the second current collector 43, the heat insulation layer 44 can effectively reduce the heat exchange between the first current collector 42 and the second current collector 43, thereby reducing the influence on the temperature of the refrigerant medium in the first current collector 42 or the second current collector 43, and improving the heat exchange effect of the refrigerant medium on the battery cell 21.

[0103] Combined with Figures 5 to 9 As shown, in some embodiments of the present application, at least one of the first current collector 42 and the second current collector 43 is externally coated with a heat insulation layer 44.

[0104] Specifically, the outer surface of the first current collector 42 can be coated with the heat insulation layer 44, and / or the outer surface of the second current collector 43 is coated with the heat insulation layer 44. Optionally, the heat insulation layer 44 includes but is not limited to a heat preservation member or a heat radiation prevention member. Among them, the heat preservation member includes but is not limited to a foamed cotton layer or an aerogel layer. The heat radiation prevention member includes but is not limited to an aluminum foil layer.

[0105] By coating the outer surface of the first current collector 42 with the heat insulation layer 44, the heat exchange between the first current collector 42 and the outside can be reduced, thereby reducing the influence of the outside temperature on the temperature of the refrigerant medium in the first current collector 42, or reducing the influence of the temperature of the refrigerant medium in the first current collector 42 on the outside temperature; and / or by coating the outer surface of the second current collector 43 with the heat insulation layer 44, the heat exchange between the second current collector 43 and the outside can be reduced, thereby reducing the influence of the outside temperature on the temperature of the refrigerant medium in the second current collector 43, or reducing the influence of the temperature of the refrigerant medium in the second current collector 43 on the outside temperature.

[0106] Combined with Figures 5 to 9 As shown, in some embodiments of the present application, at least one of the first current collector 42 and the second current collector 43 is a heat insulation member.

[0107] Specifically, the first current collector 42 can be a tubular structure made of a heat insulation material, and / or the second current collector 43 can be a tubular structure made of a heat insulation material. Optionally, the heat insulation material includes but is not limited to glass fiber.

[0108] By setting the first current collector 42 as a heat insulator, the heat exchange between the first current collector 42 and the outside can be reduced, thereby reducing the influence of the outside temperature on the temperature of the refrigerant medium in the first current collector 42, or reducing the influence of the temperature of the refrigerant medium in the first current collector 42 on the outside temperature; and / or, by setting the second current collector 43 as a heat insulator, the heat exchange between the second current collector 43 and the outside can be reduced, thereby reducing the influence of the outside temperature on the temperature of the refrigerant medium in the second current collector 43, or reducing the influence of the temperature of the refrigerant medium in the second current collector 43 on the outside temperature.

[0109] Combined with Figures 5 to 10 As shown, in some embodiments of the present application, the heat exchange assembly 40 further includes a limiting member 45. The first current collector 42 and the second current collector 43 are respectively connected to the limiting member 45, and the first current collector 42 and the second current collector 43 are configured to have a fixed relative position under the constraint of the limiting member 45.

[0110] Specifically, the limiting member 45 is used to connect and fix the first current collector 42 and the second current collector 43, so that the first current collector 42 and the second current collector 43 have a fixed relative position under the constraint of the limiting member 45. Among them, the limiting member 45 can be a metal member or a non-metal member, and the non-metal member includes a plastic member. The plastic member is easy to form and is not conducive to heat conduction.

[0111] By fixing the first current collector 42 and the second current collector 43 with the limiting member 45, the relative displacement between the first current collector 42 and the second current collector 43 can be reduced, which is convenient for maintaining the fixed relative position of the first current collector 42 and the second current collector 43, and thus convenient for the installation and adjustment of the pipeline.

[0112] Combined with Figures 5 to 10 As shown, in some embodiments of the present application, the limiting member 45 includes a first installation groove 454, a second installation groove 455, and a limiting protrusion 453 disposed between the first installation groove 454 and the second installation groove 455. Part of the first current collector 42 is disposed in the first installation groove 454, part of the second current collector 43 is disposed in the second installation groove 455, and the first current collector 42 and the second current collector 43 are spaced apart by the limiting protrusion 453.

[0113] Specifically, the limiting member 45 is formed with a first installation groove 454 and a second installation groove 455. A part of the first current collector 42 can be inserted into the first installation groove 454 and fixed, and a part of the second current collector 43 can be inserted into the second installation groove 455 and fixed, so that the relative positions of the first current collector 42 and the second current collector 43 are fixed by the limiting member 45. At the same time, in order to reduce the heat exchange between the first current collector 42 and the second current collector 43, a limiting protrusion 453 is further provided between the first installation groove 454 and the second installation groove 455. After the first current collector 42 and the second current collector 43 are respectively connected to the limiting member 45, they are separated by the limiting protrusion 453.

[0114] Optionally, the limiting member 45 includes a bottom plate portion 451 and two side plate portions 452 provided at opposite ends of the bottom plate portion 451. The bottom plate portion 451 and the two side plate portions 452 enclose a concave structure. The limiting protrusion 453 and the side plate portion 452 are provided on the same side of the bottom plate portion 451 and are provided between the two side plate portions 452, so as to divide the concave structure into a first installation groove 454 and a second installation groove 455. Wherein, an extending end 456 extending towards the limiting protrusion 453 is provided at one end of the side plate portion 452 away from the bottom plate portion 451, and extending ends 456 extending towards the two side plate portions 452 are respectively provided on both sides of one end of the limiting protrusion 453 away from the bottom plate portion 451, so as to limit the first current collector 42 inserted into the first installation groove 454 and the second current collector 43 inserted into the second installation groove 455 through the extending ends 456, and reduce the first current collector 42 from detaching from the first installation groove 454 and reduce the second current collector 43 from detaching from the second installation groove 455.

[0115] By arranging a part of the first current collector 42 in the first installation groove 454 and arranging a part of the second current collector 43 in the second installation groove 455, it is convenient to fix the relative positions of the first current collector 42 and the second current collector 43, and the first current collector 42 and the second current collector 43 are separated by the limiting protrusion 453, so as to reduce the phenomenon that the first current collector 42 and the second current collector 43 are in contact with each other and generate heat exchange, and further reduce the influence on the temperature of the refrigerant medium in the first current collector 42 or the second current collector 43, and improve the heat exchange effect of the refrigerant medium on the battery cell 21.

[0116] Combined Figures 5 to 9 As shown, in some embodiments of the present application, the first port 411 and the second port 412 are respectively provided on one side of the heat exchange tube 41 along the first direction X. The first current collector 42 and the second current collector 43 respectively extend along the second direction Y and are jointly provided on one side of the heat exchange tube 41 along the first direction X, and the first current collector 42 and the second current collector 43 are arranged along the first direction X. Wherein, the first direction X is one of the length direction and the width direction of the battery device 10, and the second direction Y is the other of the length direction and the width direction of the battery device 10.

[0117] Specifically, the first fluid collector 42 and the second fluid collector 43 can be arranged side by side along the first direction X and are jointly disposed on one side of the heat exchange tube 41 along the first direction X. Optionally, when the first port 411 and the second port 412 are respectively disposed on one side of the heat exchange tube 41 along the length direction of the battery device 10, the first fluid collector 42 and the second fluid collector 43 are jointly disposed on one side of the heat exchange tube 41 along the length direction of the battery device 10. Optionally, when the first port 411 and the second port 412 are respectively disposed on one side of the heat exchange tube 41 along the width direction of the battery device 10, the first fluid collector 42 and the second fluid collector 43 are jointly disposed on one side of the heat exchange tube 41 along the width direction of the battery device 10.

[0118] By jointly arranging the first fluid collector 42 and the second fluid collector 43 along the first direction X on one side of the heat exchange tube 41, it is convenient to operate the first fluid collector 42 and the second fluid collector 43 respectively through the same side of the heat exchange tube 41, thereby facilitating the installation and adjustment of the pipeline.

[0119] Combined Figures 2 to 9 As shown, in some embodiments of the present application, the number of the heat exchange tubes 41 is multiple, and the multiple heat exchange tubes 41 are arranged in a row along the second direction Y, and the first port 411 of any one of the heat exchange tubes 41 is respectively communicated with the first fluid collector 42, and the second port 412 of any one of the heat exchange tubes 41 is respectively communicated with the second fluid collector 43.

[0120] Specifically, the first fluid collector 42 and the second fluid collector 43 respectively extend along the second direction Y. Therefore, the multiple heat exchange tubes 41 can be arranged in a row along the second direction Y so that the refrigerant medium flow channels of any one of the heat exchange tubes 41 are respectively communicated with the first fluid collector 42 and the second fluid collector 43.

[0121] Optionally, multiple battery cells 21 in the present application form multiple battery cell assemblies 20. Among them, any one of the battery cell assemblies 20 includes multiple battery cells 21 arranged in a row along the first direction X, and the multiple battery cell assemblies 20 are arranged in a row along the second direction Y, and at least one heat exchange tube 41 is respectively provided corresponding to any one of the battery cell assemblies 20.

[0122] By providing multiple heat exchange tubes 41, the multiple heat exchange tubes 41 can respectively exchange heat with the battery cells 21, thereby improving the heat exchange efficiency of the battery device 10, and by respectively communicating any one of the heat exchange tubes 41 with the first fluid collector 42 and the second fluid collector 43, the setting of the connecting pipelines can be reduced.

[0123] Combined Figures 2 to 9As shown, in some embodiments of the present application, the number of heat exchange tubes 41 is two, the two heat exchange tubes 41 are arranged along the second direction Y, the first current collector 42 is arranged on the side of the second current collector 43 away from the heat exchange tube 41 along the first direction X, and the two ends of the first current collector 42 along the second direction Y are respectively arranged beyond the end of the second current collector 43, and the first ports 411 of the two heat exchange tubes 41 are respectively connected to the two ends of the first current collector 42.

[0124] Specifically, the size of the first current collector 42 along the second direction Y is greater than the size of the second current collector 43 along the second direction Y, so that both ends of the first current collector 42 along the second direction Y are respectively arranged beyond the ends of the second current collector 43. The first port 411 of one heat exchange tube 41 is connected to the end of one end of the first current collector 42, wherein the first port 411 of another heat exchange tube 41 is connected to the end of the other end of the first current collector 42, and the second ports 412 of the two heat exchange tubes 41 are respectively connected to the second current collector 43 within the length range of the first current collector 42, so that the first ports 411 of the two heat exchange tubes 41 are arranged outside the heat exchange tube 41 compared with the second ports 412.

[0125] When the temperature of the battery cell 21 rises and needs to be cooled and dissipated, the first current collector 42 is used as the liquid inlet current collector, and the first port 411 is used as the liquid inlet end. Correspondingly, the second current collector 43 is used as the liquid outlet current collector, and the second port 412 is used as the liquid outlet end. The low-temperature refrigerant first enters the refrigerant flow channel near the outside of the heat exchange tube 41, and finally flows out through the refrigerant flow channel inside the heat exchange tube 41. Among them, the battery cell 21 located in the central area of ​​the battery device 10 has a higher temperature than the battery cell 21 on the outside. Therefore, the refrigerant first enters the refrigerant flow channel near the outside and exchanges heat with the battery cell 21 on the outside, which can reduce the temperature rise of the refrigerant, and then flows through the refrigerant flow channel on the inside, thereby improving the cooling and heat dissipation effect on the battery cell 21. When the temperature of the battery cell 21 is too low and the battery cell 21 needs to be heated, the first current collector 42 can be used as a liquid outlet current collector, and the first port 411 can be used as a liquid outlet end. Correspondingly, the second current collector 43 can be used as a liquid inlet current collector, and the second port 412 can be used as a liquid inlet end. The high-temperature refrigerant first enters the refrigerant flow channel on the inner side of the heat exchange tube 41, and finally flows out through the refrigerant flow channel near the outer side of the heat exchange tube 41. Among them, the battery cell 21 located in the central area of ​​the battery device 10 has a higher temperature than the outer battery cell 21. Therefore, the refrigerant first enters the refrigerant flow channel near the inner side and exchanges heat with the inner battery cell 21, which can reduce the temperature drop of the refrigerant, and then flows through the outer refrigerant flow channel, thereby improving the heating effect on the battery cell 21.

[0126] By arranging both ends of the first current collector 42 along the second direction Y to extend beyond the ends of the second current collector 43, it is convenient for the first port 411 of the heat exchange tube 41 to be connected to the first current collector 42 through both ends of the first current collector 42, and the second port 412 of the heat exchange tube 41 is connected to the second current collector 43, so that the first port 411 and the second port 412 are arranged in a staggered manner along the second direction Y, and further it is convenient for the heat exchange tube 41 to be respectively connected to the first current collector 42 and the second current collector 43.

[0127] Combined Figures 5 to 9 As shown, in some embodiments of the present application, an insulating layer is coated on the outer part of a partial pipe section of the heat exchange tube 41 near the first port 411, and / or an insulating layer 44 is coated on the outer part of a partial pipe section of the heat exchange tube 41 near the second port 412.

[0128] Specifically, the heat exchange tube 41 may include a continuously bent tubular structure, and a refrigerant medium flow channel is formed inside the tubular structure. Among them, the first port 411 and the second port 412 are respectively arranged on two straight sections 413 located on the outermost side of the heat exchange tube 41 along the second direction Y. Among them, in order to adapt to the length dimensions of the first current collector 42 and the second current collector 43 along the second direction Y, one of the two straight sections 413 located on the outermost side can be bent towards the direction close to the other, so as to facilitate the two straight sections 413 located on the outermost side to be jointly connected to the first current collector 42 or the second current collector 43. When the heat exchange tube 41 is used to cool and dissipate heat from the battery cell 21, a low-temperature refrigerant medium flows inside a partial pipe section of the heat exchange tube near the first port 411, and when the low-temperature refrigerant medium exchanges heat with the battery cell 21 through the heat exchange tube 41, a high-temperature refrigerant medium is formed and flows out through the second port 412. Therefore, the temperature of the partial pipe section of the heat exchange tube near the first port 411 is relatively low, while the temperature of the partial pipe section of the heat exchange tube near the second port 412 is too high. In order to reduce the heat exchange between the pipe section with too high temperature and the heat exchange pipe with too low temperature, resulting in the increase of the temperature of the refrigerant medium in the partial pipe section of the heat exchange tube near the first port 411 and affecting the cooling and heat dissipation effect of the refrigerant medium on the battery cell 21, an insulating layer 44 can be coated on the outer part of a partial pipe section of the heat exchange tube near the first port 411, and / or an insulating layer 44 can be coated on the outer part of a partial pipe section of the heat exchange tube near the second port 412. It should be noted that Figure 7 and Figure 8 only shows that an insulating layer 44 is coated on the outer part of the first current collector 42, but in actual application, an insulating layer 44 can also be coated on the outer part of the second current collector 43, or only an insulating layer is coated on the outer part of the second current collector 43.

[0129] Optionally, when the limiting member 45 is used to connect and fix the first current collector 42 and the second current collector 43, in order to reduce the influence of the heat insulation layer 44 on the insertion and assembly of the first current collector 42 and the second current collector 43, the heat insulation layer 44 can be set as a multi-segment structure with a break, so that when the first current collector 42 and the second current collector 43 are assembled, the heat insulation layer 44 will not be placed in the first installation groove 454 or the second installation groove 455.

[0130] By covering the outer part of the heat exchange tube near the first port 411 with the heat insulation layer 44, the heat exchange between the part of the heat exchange tube near the first port 411 and the outside can be reduced, thereby reducing the influence of the outside temperature on the temperature of the refrigerant medium in the part of the tube near the first port 411, or reducing the influence of the refrigerant medium in the part of the tube near the first port 411 on the outside temperature; by covering the outer part of the heat exchange tube near the second port 412 with the heat insulation layer 44, the heat exchange between the part of the heat exchange tube near the second port 412 and the outside can be reduced, thereby reducing the influence of the outside temperature on the temperature of the refrigerant medium in the part of the tube near the second port 412, or reducing the influence of the refrigerant medium in the part of the tube near the second port 412 on the outside temperature.

[0131] Combined Figures 5 to 9 As shown, in some embodiments of the present application, the heat exchange assembly 40 further includes a first joint 46 and a second joint 47. The first joint 46 is arranged on one side of the first current collector 42 along the third direction Z and is communicated with the first current collector 42. The second joint 47 is arranged on one side of the second current collector 43 along the third direction Z and is communicated with the second current collector 43, wherein the third direction Z is the height direction of the battery device 10.

[0132] Specifically, the first joint 46 and the second joint 47 can be respectively communicated with external pipelines, so as to input the refrigerant medium into the first current collector 42 through the first joint 46 and output the refrigerant medium in the second current collector 43 through the second joint 47; or, the refrigerant medium can be input into the second current collector 43 through the second joint 47 and the refrigerant medium in the first current collector 42 can be output through the first joint 46.

[0133] By arranging the first joint 46 on one side of the first current collector 42 along the height direction of the battery device 10 and arranging the second joint 47 on one side of the second current collector 43 along the height direction of the battery device 10, the space occupied by the first joint 46 and the second joint 47 along the length direction or the width direction of the battery device 10 can be reduced, so as to facilitate increasing the size of the heat exchange tube 41 along the length direction or the width direction, thereby improving the heat exchange effect of the heat exchange tube 41.

[0134] Combined Figures 5 to 9As shown, in some embodiments of the present application, the first joint 46 and the second joint 47 are arranged at intervals, and the minimum interval dimension between the first joint 46 and the second joint 47 is greater than or equal to 45 mm.

[0135] Specifically, the specific interval dimension between the first joint 46 and the second joint 47 can be determined according to the lengths of the first current collector 42 and the second current collector 43, but the minimum linear interval dimension between the two should be greater than or equal to 45 mm. For example, the minimum interval dimension between the first joint 46 and the second joint 47 along the second direction Y is any value among 45 mm... 60 mm... 100 mm, so as to reduce the heat exchange between the first joint 46 and the second joint 47.

[0136] By setting the minimum interval dimension between the first joint 46 and the second joint 47 to be greater than or equal to 45 mm, the interval dimension between the first joint 46 and the second joint 47 can be increased, thereby reducing the heat exchange between the first joint 46 and the second joint 47, and further reducing the influence on the temperature of the refrigerant medium in the first joint 46 or the second joint 47.

[0137] Combined with Figures 2 to 9 As shown, in some embodiments of the present application, the number of battery cells 21 is multiple. At least some of the battery cells 21 are arranged in the first direction X, and / or at least some of the battery cells 21 are arranged in the second direction Y. The heat exchange tube 41 is arranged on one side of the battery cells 21 along the third direction Z. Among them, the first direction X is one of the length direction and the width direction of the battery device 10, the second direction Y is the other of the length direction and the width direction of the battery device 10, and the third direction Z is the height direction of the battery device 10.

[0138] Specifically, a plurality of battery cells 21 in the present application form a plurality of battery cell assemblies 20. Among them, any one battery cell assembly 20 includes a plurality of battery cells 21 arranged in the first direction X, and a plurality of battery cell assemblies 20 are arranged in the second direction Y. Any one battery cell assembly 20 is respectively provided with at least one heat exchange tube 41.

[0139] By arranging at least some of the battery cells 21 in the first direction X, and / or at least some of the battery cells 21 in the second direction Y, and arranging the heat exchange tube 41 on one side of the battery cells 21 along the third direction Z, heat exchange can be carried out between a single heat exchange tube 41 and a plurality of battery cells 21, thereby improving the heat exchange efficiency of the heat exchange tube 41 and reducing the number of heat exchange tubes 41.

[0140] Combined with Figures 2 to 7As shown in the figure, a second aspect of the present application proposes a heat exchange component 40, which includes a heat exchange tube 41, a first current collector 42, and a second current collector 43. The heat exchange tube 41 includes a plurality of straight sections 413 and at least one bent section 414. Any two adjacent straight sections 413 are connected and communicated through the bent section 414. The heat exchange tube 41 is configured to be capable of heat exchange with the battery cell 21. A refrigerant medium flow channel is formed inside the heat exchange tube 41. A first port 411 and a second port 412 that are communicated with the refrigerant medium flow channel are respectively formed at both ends of the heat exchange tube 41. The first current collector 42 and the second current collector 43 are of a split structure and are commonly arranged on the same side of the heat exchange tube 41. Among them, the first current collector 42 is communicated with the first port 411, and the second current collector 43 is communicated with the second port 412.

[0141] Specifically, the heat exchange tube 41 is configured to be capable of heat exchange with the battery cell 21, including at least the following several ways. The heat exchange tube 41 can be directly attached to and heat-exchanged with the battery cell 21. Or, a thermal conductive adhesive is provided between the heat exchange tube 41 and the battery cell 21, and heat exchange is performed between the heat exchange tube 41 and the battery cell 21 through the thermal conductive adhesive. Or, the heat exchange tube 41 and the battery cell 21 are arranged at intervals, and heat exchange is performed between the heat exchange tube 41 and the battery cell 21 through air flow. Of course, the heat exchange between the heat exchange tube 41 and the battery cell 21 is not limited to the above several ways, and common heat exchange methods in the art can be used in the technical solution of the present application.

[0142] The heat exchange tube 41 is of a tubular structure and includes a plurality of straight sections 413 and at least one bent section 414. Any one straight section 413 extends along the first direction X, and the plurality of straight sections 413 are arranged at intervals along the second direction Y. Any two adjacent straight sections 413 along the second direction Y are connected and communicated through the bent section 414, thereby forming a continuously bent tubular structure. Among them, a refrigerant medium flow channel is formed inside the heat exchange tube 41. The refrigerant medium flow channel is used for circulating the refrigerant medium. The refrigerant medium includes but is not limited to chlorofluorocarbons or hydrocarbons, etc. The refrigerant medium flow channel sequentially passes through the inside of the plurality of straight sections 413 and at least one bent section 414, and a first port 411 and a second port 412 are respectively formed at both ends of the heat exchange tube 41 in the extending direction. Optionally, the first port 411 and the second port 412 can be respectively formed on the two outermost straight sections 413 of the heat exchange tube 41 along the second direction Y. During the heat exchange process between the battery cell 21 and the heat exchange tube 41, the refrigerant medium flows through the refrigerant medium flow channel and exchanges heat with the battery cell 21 through the heat exchange tube 41, thereby adjusting the temperature of the battery cell 21.

[0143] The first fluid collector 42 and the second fluid collector 43 are of a split structure and are commonly arranged on the same side of the heat exchange tube 41. Among them, the first fluid collector 42 and the second fluid collector 43 can be tubular structures respectively, including square tubular structures or circular tubular structures. Optionally, the first fluid collector 42 and the second fluid collector 43 are commonly arranged on one side of the heat exchange tube along the first direction X. Among them, one of the first fluid collector 42 and the second fluid collector 43 can be used as the liquid inlet collector, and the other can be used as the liquid outlet collector. First ports 411 and second ports 412 are respectively formed at both ends of the refrigerant medium flow path. Among them, the first fluid collector 42 is communicated with the first port 411 of the refrigerant medium flow path, and the second fluid collector 43 is communicated with the second port 412 of the refrigerant medium flow path. For the convenience of description, in this application, only when the temperature of the battery cell 21 rises and cooling and heat dissipation are required, the first fluid collector 42 is used as the liquid inlet collector, the first port 411 is used as the liquid inlet end. Correspondingly, the second fluid collector 43 is used as the liquid outlet collector, and the second port 412 is used as the liquid outlet end as an example for illustration. And when the temperature of the battery cell 21 is too low and the battery cell 21 needs to be heated up, the first fluid collector 42 can be used as the liquid outlet collector, the first port 411 is used as the liquid outlet end. Correspondingly, the second fluid collector 43 is used as the liquid inlet collector, and the second port 412 is used as the liquid inlet end.

[0144] According to the heat exchange assembly 40 of the present application, the temperature of the battery cell 21 can be adjusted by the refrigerant medium in the refrigerant medium flow path. When the battery cell 21 needs to be cooled and dissipated, one of the first fluid collector 42 and the second fluid collector 43 is used as the liquid inlet collector, and the other is used as the liquid outlet collector. By adopting a split structure design for the first fluid collector 42 and the second fluid collector 43, compared with the liquid inlet collector and the liquid outlet collector of the integral structure, the heat exchange between the first fluid collector 42 and the second fluid collector 43 can be reduced, thereby reducing the influence on the temperature of the refrigerant medium in the first fluid collector 42 or the second fluid collector 43 and improving the heat exchange effect of the refrigerant medium on the battery cell 21.

[0145] Combined with Figures 5 to 9 As shown, in some embodiments of the present application, a heat insulation layer 44 is provided between the first fluid collector 42 and the second fluid collector 43;

[0146] And / or, at least one of the first fluid collector 42 and the second fluid collector 43 is externally coated with a heat insulation layer 44;

[0147] And / or, at least one of the first fluid collector 42 and the second fluid collector 43 is a heat insulation member.

[0148] Specifically, the heat insulation layer 44 can be disposed between the first current collector 42 and the second current collector 43 along the arrangement direction thereof, so as to reduce the heat exchange between the first current collector 42 and the second current collector 43 along the arrangement direction through the blocking effect of the heat insulation layer 44. Optionally, the heat insulation layer 44 includes but is not limited to a heat preservation member or a heat radiation prevention member. Among them, the heat preservation member includes but is not limited to a foamed cotton layer or an aerogel layer. The heat radiation prevention member includes but is not limited to an aluminum foil layer.

[0149] By providing the heat insulation layer 44 between the first current collector 42 and the second current collector 43, the heat insulation layer 44 can effectively reduce the heat exchange between the first current collector 42 and the second current collector 43, thereby reducing the influence on the temperature of the refrigerant medium in the first current collector 42 or the second current collector 43, and improving the heat exchange effect of the refrigerant medium on the battery cell 21.

[0150] Specifically, the outer surface of the first current collector 42 can be coated with the heat insulation layer 44, and / or, the outer surface of the second current collector 43 is coated with the heat insulation layer 44. Optionally, the heat insulation layer 44 includes but is not limited to a heat preservation member or a heat radiation prevention member. Among them, the heat preservation member includes but is not limited to a foamed cotton layer or an aerogel layer. The heat radiation prevention member includes but is not limited to an aluminum foil layer.

[0151] By coating the outer surface of the first current collector 42 with the heat insulation layer 44, the heat exchange between the first current collector 42 and the outside can be reduced, thereby reducing the influence of the outside temperature on the temperature of the refrigerant medium in the first current collector 42, or reducing the influence of the temperature of the refrigerant medium in the first current collector 42 on the outside temperature; and / or, by coating the outer surface of the second current collector 43 with the heat insulation layer 44, the heat exchange between the second current collector 43 and the outside can be reduced, thereby reducing the influence of the outside temperature on the temperature of the refrigerant medium in the second current collector 43, or reducing the influence of the temperature of the refrigerant medium in the second current collector 43 on the outside temperature.

[0152] Specifically, the first current collector 42 can be a tubular structure made of a heat insulation material, and / or, the second current collector 43 can be a tubular structure made of a heat insulation material. Optionally, the heat insulation material includes but is not limited to glass fiber.

[0153] By setting the first current collector 42 as a heat insulation member, the heat exchange between the first current collector 42 and the outside can be reduced, thereby reducing the influence of the outside temperature on the temperature of the refrigerant medium in the first current collector 42, or reducing the influence of the temperature of the refrigerant medium in the first current collector 42 on the outside temperature; and / or, by setting the second current collector 43 as a heat insulation member, the heat exchange between the second current collector 43 and the outside can be reduced, thereby reducing the influence of the outside temperature on the temperature of the refrigerant medium in the second current collector 43, or reducing the influence of the temperature of the refrigerant medium in the second current collector 43 on the outside temperature.

[0154] A third aspect of the present application provides an electrical device, which has the battery device of any one of the above.

[0155] As Figure 1 shown, a third aspect of the present application provides an electrical device, which includes the battery device 10 of any one of the above.

[0156] Since the electrical device in the present application has the same technical features as the battery device 10 in any of the above embodiments and can achieve the same technical effects, details will not be repeated here.

[0157] As Figure 1 shown, in some embodiments of the present application, the electrical device can be a vehicle 1, which includes the battery device 10 of any one of the above embodiments. The battery device 10 is used to provide electrical energy for the vehicle 1 and to drive the vehicle 1 to move.

[0158] The above description is only an overview of the technical solution of the present application. In order to understand the technical means of the present application more clearly, it can be implemented according to the content of the specification. In order to make the above and other objects, features, and advantages of the present application more obvious and understandable, specific embodiments of the present application are hereinafter given.

[0159] Combined with Figures 2 to 10 shown, in some embodiments of the present application, the battery device 10 includes a heat exchange component 40 and at least one battery cell 21. The heat exchange component 40 includes a heat exchange tube 41, a first current collector 42, and a second current collector 43. The heat exchange tube 41 includes a plurality of straight sections 413 and at least one bent section 414. Any two adjacent straight sections 413 are connected and communicated through the bent section 414. The heat exchange tube 41 is configured to be able to perform heat exchange with the battery cell 21. A refrigerant medium flow channel is formed inside the heat exchange tube 41. A first port 411 and a second port 412 that are communicated with the refrigerant medium flow channel are respectively formed at both ends of the heat exchange tube 41. The first current collector 42 and the second current collector 43 are of a split structure and are commonly disposed on the same side of the heat exchange tube 41. Among them, the first current collector 42 is communicated with the first port 411, the second current collector 43 is communicated with the second port 412, and heat insulation layers 44 are respectively coated on the outsides of the first current collector 42 and the second current collector 43.

[0160] Optionally, the heat exchange assembly 40 further includes a stopper 45, the first current collector 42 and the second current collector 43 are respectively connected to the stopper 45, and the first current collector 42 and the second current collector 43 are configured to be fixed in relative position under the constraint of the stopper 45. The stopper 45 includes a first mounting groove 454, a second mounting groove 455, and a stopper protrusion 453 disposed between the first mounting groove 454 and the second mounting groove 455, a portion of the first current collector 42 is disposed in the first mounting groove 454, a portion of the second current collector 43 is disposed in the second mounting groove 455, and the first current collector 42 and the second current collector 43 are spaced apart by the stopper protrusion 453.

[0161] Optionally, the first port 411 and the second port 412 are respectively arranged on one side of the heat exchange tube 41 along the first direction X, the first current collector 42 and the second current collector 43 are respectively extended along the second direction Y, and are jointly arranged on one side of the heat exchange component 40 along the first direction X, and the first current collector 42 and the second current collector 43 are arranged in sequence along the first direction X, wherein the first direction X is one of the length direction and the width direction of the battery device 10, and the second direction Y is the other of the length direction and the width direction of the battery device 10.

[0162] Optionally, the number of heat exchange tubes 41 is two, and the two heat exchange tubes 41 are arranged along the second direction Y, the first current collector 42 is arranged on the side of the second current collector 43 away from the heat exchange tube 41 along the first direction X, and the two ends of the first current collector 42 along the second direction Y are respectively arranged beyond the end of the second current collector 43, and the first ports 411 of the two heat exchange tubes 41 are respectively connected to the two ends of the first current collector 42. Among them, the outside of the part of the heat exchange tube near the first port 411 is coated with a heat insulation layer 44, and the outside of the part of the heat exchange tube near the second port 412 is coated with a heat insulation layer 44.

[0163] Optionally, the heat exchange assembly 40 further includes a first joint 46 and a second joint 47, wherein the first joint 46 is disposed on one side of the first current collector 42 along the third direction Z and is in communication with the first current collector 42, and the second joint 47 is disposed on one side of the second current collector 43 along the third direction Z and is in communication with the second current collector 43, wherein the third direction Z is the height direction of the battery device 10. The first joint 46 and the second joint 47 are spaced apart, and the minimum spacing dimension between the first joint 46 and the second joint 47 is greater than or equal to 45 mm.

[0164] Optionally, there are multiple battery cells 21 , and the multiple battery cells 21 are arranged along the first direction X and the second direction Y respectively, and the heat exchange tube 41 is arranged along the third direction Z on one side of the battery cell 21 .

[0165] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the various embodiments of the present application, and they should all be covered within the scope of the claims and the description of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed in the text, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A battery device, characterized in that, include: at least one battery cell; A heat exchange component, the heat exchange component includes a heat exchange tube, a first collector and a second collector, the heat exchange tube includes a plurality of straight sections and at least one bent section, any two adjacent straight sections are connected and communicated through the bent section, the heat exchange tube is configured to be able to exchange heat with the battery cell, a cold medium flow channel is formed inside the heat exchange tube, and a first port and a second port connected to the cold medium flow channel are respectively formed at both ends of the heat exchange tube, the first collector and the second collector are of a split structure and are jointly arranged on the same side of the heat exchange tube, wherein the first collector is connected to the first port, and the second collector is connected to the second port.

2. The battery device according to claim 1, wherein, A heat insulation layer is provided between the first current collector and the second current collector.

3. The battery device according to claim 1, characterized in that, At least one of the first current collector and the second current collector is coated with a heat insulation layer.

4. The battery device according to claim 1, characterized in that At least one of the first current collector and the second current collector is a thermal insulator.

5. The battery device according to any one of claims 1 to 4, characterized in that, The heat exchange assembly further includes a limiting member, the first current collector and the second current collector are respectively connected to the limiting member, and the first current collector and the second current collector are configured to be fixed in relative position under the constraint of the limiting member.

6. The battery device according to claim 5, characterized in that, The limiting member includes a first mounting groove, a second mounting groove, and a limiting protrusion arranged between the first mounting groove and the second mounting groove, part of the first current collector is arranged in the first mounting groove, part of the second current collector is arranged in the second mounting groove, and the first current collector and the second current collector are spaced apart by the limiting protrusion.

7. The battery device according to any one of claims 1 to 4, characterized in that, The first port and the second port are respectively arranged on one side of the heat exchange tube along the first direction, the first current collector and the second current collector are respectively extended along the second direction and are commonly arranged on one side of the heat exchange tube along the first direction, and the first current collector and the second current collector are arranged in an array along the first direction, wherein the first direction is one of the length direction and the width direction of the battery device, and the second direction is the other of the length direction and the width direction of the battery device.

8. The battery device according to claim 7, characterized in that, There are multiple heat exchange tubes, which are arranged along the second direction, and the first port of any heat exchange tube is respectively connected to the first collector, and the second port of any heat exchange tube is respectively connected to the second collector.

9. The battery device according to claim 7, characterized in that, The number of the heat exchange tubes is two, and the two heat exchange tubes are arranged along the second direction. The first current collector is arranged on the side of the second current collector away from the heat exchange tube along the first direction, and the two ends of the first current collector along the second direction are respectively arranged beyond the end of the second current collector, and the first ports of the two heat exchange tubes are respectively connected to the two ends of the first current collector.

10. The battery device according to any one of claims 1 to 4, characterized in that, The exterior of a portion of the heat exchange tube close to the first port is coated with a heat insulation layer, and / or the exterior of a portion of the heat exchange tube close to the second port is coated with a heat insulation layer.

11. The battery device according to any one of claims 1 to 4, characterized in that The heat exchange assembly further includes a first joint and a second joint. The first joint is disposed on one side of the first current collector along the third direction and is in communication with the first current collector. The second joint is disposed on one side of the second current collector along the third direction and is in communication with the second current collector. Wherein, the third direction is the height direction of the battery device.

12. The battery device according to claim 11, characterized in that, The first joint and the second joint are spaced apart, and the minimum spacing dimension between the first joint and the second joint is greater than or equal to 45 mm.

13. The battery device according to any one of claims 1 to 4, characterized in that, The number of the battery cells is plural. At least a part of the battery cells are arranged along the first direction, and / or at least a part of the battery cells are arranged along the second direction. The heat exchange tube is disposed on one side of the battery cells along the third direction. Wherein, the first direction is one of the length direction and the width direction of the battery device, the second direction is the other of the length direction and the width direction of the battery device, and the third direction is the height direction of the battery device.

14. A heat exchange component, characterized in that, Comprising: A heat exchange tube, which includes a plurality of straight sections and at least one bent section. Any two adjacent straight sections are connected and communicated through the bent section. The heat exchange tube is configured to be capable of heat exchange with the battery cells. A refrigerant medium flow channel is formed inside the heat exchange tube, and a first port and a second port that are in communication with the refrigerant medium flow channel are respectively formed at both ends of the heat exchange tube. A first current collector and a second current collector. The first current collector and the second current collector are of a split structure and are commonly disposed on the same side of the heat exchange tube. Wherein, the first current collector is in communication with the first port, and the second current collector is in communication with the second port.

15. The heat exchange component according to claim 14, wherein, An insulating layer is provided between the first current collector and the second current collector. And / or, at least one of the first current collector and the second current collector is externally coated with an insulating layer. And / or, at least one of the first current collector and the second current collector is an insulating member.

16. An electrical device, characterized in that, Having the battery device according to any one of claims 1 to 13.

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