Battery device and electric device

Abstract

The utility model relates to a battery device and a power utilization device. The battery device comprises a battery monomer; the heat exchange piece is arranged on the side wall, in the first direction, of the battery single body, and a heat exchange flow channel allowing a phase change medium to flow is formed in the heat exchange piece; the cross section of the heat exchange runner has the maximum width in the target direction, a dividing face perpendicular to the target direction is arranged from the midpoint of the maximum width, and the dividing face divides the heat exchange runner into a first area and a second area; the adsorption part is connected with the heat exchange piece and located in the heat exchange runner, and the adsorption part is configured to adsorb part of the phase change medium through the capillary action; part of the adsorption part is arranged on the inner side wall of the first area, and part of the adsorption part is arranged on the inner side wall of the second area. The battery device and the power utilization device provided by the embodiment of the utility model have the advantage of relatively good temperature uniformity.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of battery, in particular to a battery device and a power utilization device. BACKGROUND

[0002] With the wide development of new energy technology, battery devices have been widely applied. Generally, the battery device will emit heat during use, and the heat management system needs to be used to ensure that the battery device works in a suitable environment temperature, thereby prolonging the service life and charging and discharging efficiency of the battery device.

[0003] At present, the phase change medium in the heat management system is often unevenly distributed, which leads to poor temperature uniformity of the battery device and brings great hidden dangers to performance and life. CONTENT OF THE UTILITY MODEL

[0004] Therefore, it is necessary to provide a battery device and a power utilization device to solve the problem of poor temperature uniformity.

[0005] The first aspect of the embodiment of the present application provides a battery device, comprising: a battery monomer; a heat exchange element arranged on the side wall of the battery monomer along a first direction, the heat exchange element internally forming a heat exchange flow channel for the flow of a phase change medium; the cross section of the heat exchange flow channel has a maximum width in a target direction, a partition surface perpendicular to the target direction is arranged from the midpoint of the maximum width, and the partition surface divides the heat exchange flow channel into a first region and a second region; the target direction is perpendicular to the first direction and the flow direction of the phase change medium in the heat exchange flow channel; the cross section of the heat exchange flow channel is defined as the cross section perpendicular to the flow direction of the heat exchange flow channel in the heat exchange flow channel; an adsorption part, the adsorption part is connected to the heat exchange element and located in the heat exchange flow channel, and the adsorption part is configured to adsorb part of the phase change medium by capillary action; part of the adsorption part is arranged on the inner side wall of the first region, and part of the adsorption part is arranged on the inner side wall of the second region.

[0006] By setting the adsorption part, and setting part of the adsorption part on the inner side wall of the first region, and setting part of the adsorption part on the inner side wall of the first region, the adsorption part can adsorb a part of the phase change medium by using its capillary action; when the battery device is in complex working conditions such as sudden acceleration, sudden deceleration, turning, etc., the adsorption part can use its capillary adsorption force to adsorb and fix the phase change medium in the heat exchange flow channel in its pores or internal fine structure, thereby effectively inhibiting the phenomenon of local aggregation or loss of phase change medium in the heat exchange flow channel caused by inertial force, and further, the adsorption of the adsorption part to the phase change medium can ensure that the phase change medium can be continuously and uniformly distributed in the heat exchange flow channel; and since part of the adsorption part is arranged on the inner side wall of the first region, and part of the adsorption part is arranged on the inner side wall of the second region, the inner side walls of the first region and the second region of the heat exchange flow channel can respectively adsorb a part of the phase change medium, so that the heat exchange between the heat exchange element and the battery monomer is more uniform and stable, and the performance degradation and short service life of the battery monomer caused by local overheating or overcooling are avoided; ultimately, the temperature uniformity of the battery device is good, the comprehensive performance is improved, and the service life is prolonged, and the customer experience is improved.

[0007] In one embodiment, the adsorption part includes a first sub-part and a second sub-part arranged at intervals, the first sub-part is located in the first region, and the second sub-part is located in the second region. By arranging the adsorption part to include two first sub-parts and second sub-parts arranged at intervals and independently, and arranging them respectively on the first region and the second region divided by the virtual division surface, the capillary adsorption function of the adsorption part can be deployed in the first region and the second region of the cross section of the heat exchange flow channel, and then the first sub-part and the second sub-part can independently adsorb the phase change medium in the first region and the second region.

[0008] In one embodiment, the first sub-part and the second sub-part are symmetrically arranged relative to the division surface. In this way, when the battery device is in complex working conditions such as sudden acceleration, sudden deceleration, turning, etc., the phase change medium in the first region and the second region will bear the inertial force perpendicular to the direction of the division surface (i.e. the target direction W), the first sub-part and the second sub-part can adsorb a part of the phase change medium, and since the first sub-part and the second sub-part are symmetrically arranged relative to the division surface, the adsorption capacity of the phase change medium in the first region and the second region is equal, which can consistently resist the influence of centrifugal force on the distribution of the phase change medium, avoid the temperature field deviation caused by asymmetric structure, thereby significantly improving the lateral temperature uniformity and stability of thermal management of the battery under dynamic working conditions, prolonging the service life, and improving the customer experience.

[0009] In one of the embodiments, the adsorption part comprises a first sub-part and a second sub-part connected together, the first sub-part is arranged in the first area, and the second sub-part is arranged in the second area. By arranging the first sub-part and the second sub-part to be connected together, the integrity and stability of the adsorption part can be effectively enhanced, and the two can be integrally connected, which is low in cost and reduces the number of parts.

[0010] In one of the embodiments, the cross section of the heat exchange flow channel is circular, square or trapezoidal.

[0011] In one of the embodiments, the heat exchange flow channel comprises a first inner wall and a second inner wall arranged opposite to each other along the first direction, and at least one of the first inner wall and the second inner wall is provided with at least part of the adsorption part. In this way, by arranging part of the adsorption part on at least one of the first inner wall and the second inner wall, the heat exchange with the side wall of the battery monomer along the first direction X can be better affected, so that the heat exchange between the heat exchange member and the battery monomer is more uniform and stable, and the performance degradation and service life shortening of the battery monomer caused by local overheating or overcooling are avoided. Ultimately, the temperature uniformity of the battery device is good, the comprehensive performance is improved, the service life is prolonged, and the customer experience is improved.

[0012] In one of the embodiments, the heat exchange flow channel further comprises a third inner wall and a fourth inner wall arranged opposite to each other along the target direction, the first inner wall, the third inner wall, the second inner wall and the fourth inner wall are sequentially connected end to end, and at least one of the third inner wall and the second inner wall is provided with at least part of the adsorption part. In this way, the distribution of the phase change medium on the inner wall of the heat exchange flow channel can be more uniform, so that the heat exchange between the heat exchange member and the battery monomer is more uniform and stable, and the performance degradation and service life shortening of the battery monomer caused by local overheating or overcooling are avoided. Ultimately, the temperature uniformity of the battery device is good, the comprehensive performance is improved, the service life is prolonged, and the customer experience is improved.

[0013] In one of the embodiments, the battery monomer comprises a shell, an electrode assembly and an electrode terminal, the electrode assembly is contained in the shell, the electrode terminal is electrically connected with the electrode assembly, and the electrode terminal is arranged on the top end surface of the shell along the first direction, and the heat exchange member is arranged on the bottom end surface of the battery monomer away from the electrode terminal along the first direction. In this way, on the one hand, the bottom end surface of the battery monomer along the first direction X is used as a heat conduction surface to connect with the heat exchange member, which can provide a flat, wide and stable contact area for the heat exchange member, and ensure an efficient and uniform heat conduction path between the heat exchange member and the battery monomer. On the other hand, the heat exchange member and the electrode terminal are respectively located at opposite ends, which can effectively optimize the space design, avoid structural interference, improve the overall space utilization and structural compactness, and is also conducive to standardization and manufacturing.

[0014] In one of the embodiments, at least one of the adsorption portions is arranged on one of the first inner wall and the second inner wall close to the battery cell. In this way, the battery cell and the heat conduction path of the heat exchange member can be made shortest, so as to ensure that the heat of the battery cell can be directly transmitted into the heat exchange flow channel and efficiently exchanged with the phase change medium adsorbed in the adsorption portion, thereby improving the heat exchange efficiency of the heat exchange member and significantly reducing the heat transfer thermal resistance. In turn, the phase change medium close to the battery cell can be effectively prevented from being separated from the first inner wall surface due to complex working conditions such as sudden acceleration, sudden deceleration, turning, etc., thereby avoiding the risk of local overheating of the corresponding area of the battery cell and avoiding the performance degradation and service life shortening of the battery cell due to local overheating or overcooling. Finally, the temperature uniformity of the battery device is ensured to be good, the comprehensive performance of the battery device is improved, the service life of the battery device is prolonged, and the customer experience is improved.

[0015] In one of the embodiments, the heat exchange member comprises a heat exchange plate and a flow channel plate; the battery cell is in heat conduction connection with the heat exchange plate; the flow channel plate is formed with a groove, the heat exchange plate covers the flow channel plate, and the heat exchange plate and the groove jointly form the heat exchange flow channel; at least one of the adsorption portions is arranged on the region of the heat exchange plate corresponding to the heat exchange flow channel.

[0016] In one of the embodiments, the inner side surface of the heat exchange flow channel is formed with a plurality of grooves; all the grooves serve as the adsorption portions, and each of the grooves adsorbs the phase change medium through capillary action.

[0017] In one of the embodiments, the heat exchange flow channel comprises a plurality of straight sections and a plurality of connecting sections; the straight sections extend along a second direction, and all the straight sections are arranged in parallel and spaced apart along a third direction of the heat exchange member; the connecting sections respectively connect two ends of adjacent two of the straight sections to combine to form the heat exchange flow channel; the grooves are arranged on at least one of the first inner wall and the second inner wall in the straight sections; the second direction, the first direction and the third direction are arranged to intersect with each other.

[0018] In one of the embodiments, along the first direction, the groove depth of the groove is 0.4mm-0.6mm; and / or, along the first direction, the groove width of the groove is 0.4mm-0.6mm; and / or, along the second direction, the length of the groove is 100mm-300mm.

[0019] In one of the embodiments, the heat exchange member is a bent pipe jointly formed by the straight sections and the connecting sections.

[0020] In one of the embodiments, the adsorption part comprises a plurality of wire meshes; all the wire meshes are stacked in sequence along the first direction of the heat exchange member to adsorb the phase change medium by capillary action.

[0021] In one of the embodiments, the wire mesh is formed by weaving at least one of aluminum wire, stainless steel wire and copper wire; and / or, the wire diameter of the wire mesh is 0.05mm-0.5mm; and / or, the mesh number of the wire mesh is 100-500.

[0022] In one of the embodiments, the wire mesh of the adjacent two layers is connected by welding.

[0023] In one of the embodiments, the adsorption part is formed by sintering metal powder to adsorb the phase change medium by capillary action of the powder pores.

[0024] In one of the embodiments, the adsorption part is formed by sintering powder of at least one of aluminum and copper; and / or, the porosity of the adsorption part is 30%-60%.

[0025] In one of the embodiments, along the target direction, the width A of the adsorption part and the width B of the heat exchange flow channel satisfy: A / B=0.8-1.0.

[0026] In one of the embodiments, along the first direction, the thickness C of the adsorption part and the height D of the heat exchange flow channel satisfy: C / D=0.1-0.3.

[0027] In one of the embodiments, the adsorption part and the inner side wall of the heat exchange flow channel are connected by welding or gluing.

[0028] The second aspect of the embodiments of the present application provides a power consuming device comprising the above battery device.

[0029] The above description is only a summary of the technical solutions of the present application. In order to make the technical means of the present application more clear, the embodiments can be implemented according to the content of the description, and in order to make the above and other purposes, characteristics and advantages of the present application more obvious and easy to understand, the following specific embodiments of the present application are described. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 The structural schematic diagram of a vehicle is provided for some embodiments of the present application.

[0031] Figure 2 The exploded structural schematic diagram of a battery device is provided for some embodiments of the present application.

[0032] Figure 3 The structural schematic diagram of a battery module is provided for some embodiments of the present application.

[0033] Figure 4 A decomposition structure diagram of a battery cell is provided for some embodiments of the present application.

[0034] Figure 5 A structure diagram of a heat exchange element is provided for some embodiments of the present application.

[0035] Figure 6 A structure diagram of a heat exchange element is provided for some embodiments of the present application. Figure 5 An E-E cross-sectional view of the heat exchange element is provided.

[0036] Figure 7 A structure diagram of an adsorption part is provided for some embodiments of the present application.

[0037] Figure 8 A structure diagram of a wire mesh is provided for some embodiments of the present application.

[0038] Figure 9 A structure diagram of a heat exchange element is provided for some embodiments of the present application.

[0039] Figure 10 An F-F cross-sectional view of the heat exchange element is provided. Figure 9

[0040] A structure diagram of a heat exchange element is provided for some embodiments of the present application. Figure 11

[0041] A structure diagram of a heat exchange element is provided for some embodiments of the present application. Figure 12

[0042] A structure diagram of a heat exchange element is provided for some embodiments of the present application. Figure 13

[0043] A structure diagram of a heat exchange element is provided for some embodiments of the present application. Figure 14

[0044] A structure diagram of a heat exchange element is provided for some embodiments of the present application. Figure 15 A structure diagram of a heat exchange element is provided for some embodiments of the present application. DETAILED DESCRIPTION

[0045] The embodiments of the technical solutions of the present application will be described in detail below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present application, and therefore only serve as examples, and cannot limit the protection scope of the present application.

[0046] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of this application; the use of the terms "including," "comprising," or "having" and variations thereof herein is intended to be broad and encompass the terms "consisting of" and "consisting essentially of" and variations thereof. Unless otherwise required by context, singular terms shall include pluralities and vice versa. Unless otherwise required by context, conjugations of the term "comprise" or "comprising" shall include "consisting of" and "consisting essentially of."

[0047] In the description of the embodiments of the present application, if these technical terms "first", "second" and the like appear, these terms are only used for the purpose of description and to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the technical features indicated.

[0048] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily mutually exclusive or alternative embodiments. It is expressly understood that the embodiments described herein are merely examples from a whole class of comparable embodiments which those skilled in the art will readily appreciate. It is also specifically intended that the various embodiments described herein can be combined in any and all permutations.

[0049] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent the three cases of A alone, A and B together, and B alone. In addition, the character " / " in this paper generally represents that the front and rear associated objects are a "or" relationship.

[0050] In the description of the embodiments of the present application, if the term "a plurality of" appears, the meaning of "a plurality of" is at least two (including two), for example, two, three, etc., unless otherwise expressly specifically limited. Similarly, if the term "a plurality of groups" appears, "a plurality of groups" refers to two groups or more (including two groups), and if the term "a plurality of pieces" appears, "a plurality of pieces" refers to two pieces or more (including two pieces).

[0051] In the description of the embodiments of the present application, if these terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like appear, the orientation or positional relationship indicated by these terms is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the embodiments of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the embodiments of the present application.

[0052] In the description of the embodiments of the present application, unless explicitly defined and limited otherwise, if there are technical terms "installation", "connection", "connection", "fixation" and the like, these terms should be interpreted in a broad sense. For example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0053] In the present application, unless explicitly defined and limited otherwise, if there are similar descriptions of the first feature "on" or "under" the second feature, the meaning 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 "above", "above" and "above" the second feature can be directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0054] It should be noted that if an element is referred to as "fixed to" or "provided on" another element, it can be directly on another element or there can be a middle element. If an element is considered to be "connected" to another element, it can be directly connected to another element or there can be a middle element. If present, the terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used in the present application are for illustrative purposes only and are not the only implementation.

[0055] At present, from the development of market situation, the application of battery device is more and more widely. The battery device is not only applied to the energy storage power system of water power, fire power, wind power and solar power station, but also widely applied to electric bicycle, electric motorcycle, electric vehicle and other electric vehicles, and aerospace and other fields. With the continuous expansion of the application field of battery device, the demand of its market is also increasing.

[0056] Generally, the battery device will emit heat in use, and the heat exchange system needs to be used to ensure that the battery device works in a suitable environment temperature, so as to prolong the service life and charging and discharging efficiency of the battery device. Specifically, the heat exchange scheme of laying heat exchange parts is mainly used for battery monomer. The heat of the battery monomer is transferred to the phase change medium through the heat exchange part, and the phase change medium takes away the heat to achieve the purpose of adjusting the temperature of the battery.

[0057] Since the electric device is often applied in a complex use scenario, for example, it may face sudden acceleration, sudden deceleration, turning, climbing, downhill and other harsh road conditions, which causes the phase change medium flowing in the heat exchange element to tilt and sway, resulting in poor temperature uniformity of the heat exchange element, and further resulting in poor temperature uniformity of the battery device, which brings great hidden dangers to performance and service life.

[0058] To alleviate the problem of poor temperature uniformity of the heat exchange element, an adsorption part can be added to the heat exchange element in design. The adsorption part is arranged in the heat exchange flow channel, and the adsorption part can adsorb a part of the phase change medium by using its capillary action. When the battery device is in a complex working condition such as sudden acceleration, sudden deceleration, turning, etc., the adsorption part can generate adsorption force by using its capillary action, and adsorb and fix the phase change medium in the heat exchange flow channel in its pores or internal fine structure, thereby effectively inhibiting the phenomenon of local aggregation or loss of the phase change medium in the heat exchange flow channel caused by inertial force.

[0059] The embodiments of the present application provide a battery device and an electric device. The electric device can be, but is not limited to, a mobile phone, a tablet computer, a notebook computer, an electric toy, an electric tool, an electric vehicle, an electric car, a ship, a spacecraft, an energy storage product, etc. The electric toy can include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric plane toys, etc. The spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc. The energy storage product can include energy storage stations, etc.

[0060] It should be understood that the technical solutions described in the embodiments of the present application are not only limited to the battery and electric device described above, but can also be applied to all batteries including a box body and electric devices using the battery. For the sake of brevity of description, the electric device of the embodiments of the present application is taken as a vehicle 1000 for example.

[0061] Please refer to Figure 1 , Figure 1 The vehicle 1000 provided by some embodiments of the present application is shown in a structural schematic diagram. The vehicle 1000 can be a fuel car, a gas car or a new energy car. The new energy car can be a pure electric car, a hybrid car or a range extended car, etc. The vehicle 1000 is internally provided with a battery device 100, which can be arranged at the bottom, the head or the tail of the vehicle 1000. The battery device 100 can be used for power supply of the vehicle 1000, for example, the battery device 100 can be used as an operating power source of the vehicle 1000. The vehicle 1000 can further include a controller 200 and a motor 300. The controller 200 is used to control the battery device 100 to supply power to the motor 300, for example, to meet the working power demand of the vehicle 1000 during starting, navigation and driving.

[0062] In some embodiments of the present application, the battery device 100 can not only serve as the operating power source of the vehicle 1000, but also serve as the driving power source of the vehicle 1000, replacing or partially replacing the fuel or natural gas to provide driving power for the vehicle 1000.

[0063] Figure 2 An exploded view of the battery device 100 provided in some embodiments of the present application; Figure 3 A structural schematic view of the battery module provided in some embodiments of the present application. Please refer to Figure 2 and Figure 3 In order to meet different power requirements, the battery device 100 can include a plurality of battery cells 121 and a box 110, where the battery cell 121 refers to the smallest unit constituting the battery module 120 or the battery device pack. The plurality of battery cells 121 can be connected in series and / or in parallel via electrode terminals to be applied to various application occasions.

[0064] The box 110 is used to accommodate the battery cell 121 or the battery module 120 to avoid the influence of liquid or other foreign matters on the charging or discharging of the battery cell 121.

[0065] The box 110 can adopt various structures. In some embodiments, the box 110 can include a first part 111 and a second part 112, the first part 111 and the second part 112 are mutually covered, and the first part 111 and the second part 112 jointly define an accommodation space for accommodating the battery cell 121. The second part 112 can be a hollow structure with one end open, and the first part 111 can be a plate-shaped structure, the first part 111 covers the open side of the second part 112 to jointly define the accommodation space with the second part 112; the first part 111 and the second part 112 can also be hollow structures with one side open, and the open side of the first part 111 covers the open side of the second part 112. Of course, the box 110 formed by the first part 111 and the second part 112 can be various shapes, such as a simple solid structure of a separate cuboid or a cylinder or a sphere, or a complex solid structure composed of a simple solid structure of a cuboid or a cylinder or a sphere, and the present application is not limited thereto. The material of the box 110 can be an alloy material such as aluminum alloy or iron alloy, or a high polymer material such as polycarbonate or polyisocyanurate foam plastic, or a composite material such as glass fiber and epoxy resin, and the present application is not limited thereto.

[0066] The plurality of battery cells 121 in the embodiments of the present application can directly form a battery device package, or can first form a battery module 120, and the battery module 120 forms the battery device package. Specifically, the plurality of battery cells 121 can be directly connected in series, in parallel, or in a mixed manner to form a whole, and the whole formed by the plurality of battery cells 121 is accommodated in the box body 110. Alternatively, the plurality of battery cells 121 can first be connected in series, in parallel, or in a mixed manner to form a battery module 120, and the plurality of battery modules 120 are connected in series, in parallel, or in a mixed manner to form a whole, and the whole is accommodated in the box body 110.

[0067] The battery device 100 can further include other structures, for example, the battery device 100 can further include a current collection component for realizing electrical connection between the plurality of battery cells 121.

[0068] Each battery cell 121 can be a secondary battery device or a primary battery device; can be a lithium-sulfur battery device, a sodium-ion battery device, or a magnesium-ion battery device, but is not limited thereto. The battery cell 121 can be in the shape of a cylinder, a flat body, a cuboid, or other shapes. The battery cell 121 is generally divided into three types according to the packaging method: cylindrical battery cells, cuboid square battery cells, and soft package battery cells, and the embodiments of the present application are not limited thereto. However, for the sake of simplicity, the embodiments described below will take the cuboid square lithium-ion battery cell 121 as an example for description.

[0069] Figure 4 The exploded structural view of the battery cell 121 provided in some embodiments of the present application. Figure 5 The structural view of the heat exchange member provided in some embodiments of the present application. Figure 6 The structural view of the heat exchange member provided in some embodiments of the present application. Figure 5 The E-E cross-sectional view of the heat exchange member provided. Figure 7 The structural view of the adsorption part provided in some embodiments of the present application. Figure 8 The structural view of the wire mesh provided in some embodiments of the present application. Figure 9 The structural view of the heat exchange member provided in some embodiments of the present application. Figure 10 The structural view of the heat exchange member provided in some embodiments of the present application. Figure 9 The F-F cross-sectional view of the heat exchange member provided. Figure 11 The installation schematic view of the battery cell and the heat exchange member provided in some embodiments of the present application. Figure 12 The installation schematic view of the battery cell and the heat exchange member provided in some embodiments of the present application. Figure 13 The installation schematic view of the battery cell and the heat exchange member provided in some embodiments of the present application. Figure 14 The installation schematic view of the battery cell and the heat exchange member provided in some embodiments of the present application. Figure 15 The installation schematic view of the battery cell and the heat exchange member provided in some embodiments of the present application.

[0070] Referring to Figures 1 to 15 As shown in FIG. 1, the first aspect of the present application provides a battery device. The battery device comprises a battery cell 121, a heat exchange member 10, and an adsorption portion 20.

[0071] The heat exchange member 10 is used for heat exchange with the battery cell 121. The heat exchange member 10 is internally formed with a heat exchange flow channel 11 for the flow of a phase change medium. The adsorption portion 20 is arranged in the heat exchange flow channel 11 to adsorb the phase change medium.

[0072] The heat exchange member 10 is used for carrying the battery cell 121 and providing cooling and heat dissipation functions to ensure that the battery device 100 works in a suitable ambient temperature, thereby prolonging the service life and charging and discharging efficiency of the battery device 100.

[0073] Generally, the heat exchange member 10 can be a hollow plate structure, and the heat exchange member 10 is internally formed with a heat exchange flow channel 11 for the flow of a phase change medium. The phase change medium flows into or out of the heat exchange member 10 from both ends thereof along a second direction Z, and the heat exchange member 10 is arranged on one side of the battery cell 121 along a first direction X, so that heat exchange is achieved between the plate surface of the heat exchange plate 12 and the battery cell 121.

[0074] The heat exchange member 10 is arranged on the side wall of the battery cell 121 along the first direction X. The heat exchange member 10 is internally formed with a heat exchange flow channel 11 for the flow of a phase change medium. The heat exchange flow channel 11 has a maximum width W1 in a target direction W, and a partition surface L perpendicular to the target direction W is arranged at the midpoint of the maximum width W1, and the partition surface L divides the heat exchange flow channel 11 into a first region 11a and a second region 11b; the target direction W is perpendicular to the first direction X and the flow direction of the phase change medium in the heat exchange flow channel 11; the cross section of the heat exchange flow channel 11 is defined as the cross section perpendicular to the flow direction of the heat exchange flow channel 11 in the heat exchange flow channel 11.

[0075] The adsorption portion 20 is connected to the heat exchange member 10 and located in the heat exchange flow channel 11, and the adsorption portion 20 is configured to adsorb part of the phase change medium by capillary action; part of the adsorption portion 20 is arranged on the inner side wall of the first region 11a, and part of the adsorption portion 20 is arranged on the inner side wall of the second region 11b.

[0076] It should be noted that, in combination with Figures 11 to 15 As shown in FIG. 1, in the embodiment of the present application, the maximum width W1 and the partition surface L are not actual structures, but virtual aids for defining the first region 11a and the second region 11b.

[0077] In addition, the heat exchange flow channel 11 formed inside the heat exchange element 10 can extend in one direction or meander, and thus, for the heat exchange flow channel 11 meandering, the flow direction at any point of the heat exchange flow channel 11 is also variable, and thus, the partition surface L defined by the position of any point of the heat exchange flow channel 11 can also be different.

[0078] In the embodiments of the present application, the adsorption part 20 is arranged, and part of the adsorption part 20 is arranged on the inner side wall of the first area 11a, and part of the adsorption part 20 is arranged on the inner side wall of the second area 11b. The adsorption part 20 can adsorb a part of the phase change medium by using its capillary action. When the battery device 100 is in complex working conditions such as sudden acceleration, sudden deceleration, turning, etc., the adsorption part 20 can use its capillary adsorption force to adsorb and fix the phase change medium in the pores or internal fine structures in the heat exchange flow channel 11, thereby effectively inhibiting the phenomenon of local aggregation or loss of the phase change medium in the heat exchange flow channel 11 caused by inertial force. Further, the adsorption of the phase change medium by the adsorption part 20 can ensure that the phase change medium can be continuously and uniformly distributed in the heat exchange flow channel 11. In addition, since part of the adsorption part 20 is arranged on the inner side wall of the first area 11a, and part of the adsorption part 20 is arranged on the inner side wall of the second area 11b, the inner side walls of the first area 11a and the second area 11b of the heat exchange flow channel 11 can respectively adsorb a part of the phase change medium, so that the heat exchange between the heat exchange element 10 and the battery monomer 121 is more uniform and stable, and the performance degradation and service life shortening of the battery monomer 121 caused by local overheating or overcooling are avoided. Finally, the temperature uniformity of the battery device 100 is good, the comprehensive performance is improved, the service life is prolonged, and the customer experience is improved.

[0079] In the embodiments of the present application, the phase change medium can be isobutane R600a, propane R290 or other refrigerants. In this way, the phase change medium can effectively absorb the heat transferred from the surface of the heat exchange element 10 during the flow in the heat exchange flow channel 11, thereby realizing heat exchange.

[0080] Optionally, the cross section of the heat exchange flow channel 11 is circular, square or trapezoidal.

[0081] Optionally, the adsorption part 20 and the inner side wall of the heat exchange flow channel 11 are connected by welding or gluing.

[0082] In some possible embodiments, as shown in Figures 1 to 5 , Figure 11 , Figure 12 , Figure 14 and Figure 15 , the adsorption part 20 includes a first sub-part 20a and a second sub-part 20b arranged at intervals, the first sub-part 20a is located in the first area 11a, and the second sub-part 20b is located in the second area 11b.

[0083] By setting the adsorption part 20 to include two first and second sub-parts 20a and 20b that are spaced apart and independently arranged, and by arranging them respectively on the first and second regions 11a and 11b divided by the virtual dividing surface L, the capillary adsorption function of the adsorption part 20 can be deployed in different regions in the cross section of the heat exchange channel 11, and then the first and second sub-parts 20a and 20b can independently adsorb the phase change medium in the first and second regions 11a and 11b.

[0084] When the battery device 100 is in complex working conditions such as sudden acceleration, sudden deceleration, turning, etc., the phase change medium in the first and second regions 11a and 11b will bear the inertial force perpendicular to the direction of the dividing surface L (i.e. the target direction W), and the first and second sub-parts 20a and 20b can respectively adsorb a part of the phase change medium and prevent the phase change medium from transferring from one region (e.g. the first region 11a) to another region (the second region 11b) in a large range, so that the heat exchange between the heat exchange member 10 and the battery cell 121 is more uniform and stable, and the performance degradation and service life shortening of the battery cell 121 caused by local overheating or overcooling are avoided; ultimately, the temperature uniformity of the battery device 100 is good, the comprehensive performance is improved, the service life is prolonged, and the customer experience is improved.

[0085] In addition, by setting the first and second sub-parts 20a and 20b independently, the designer can design and optimize the materials, porosities or structures of the corresponding first and second sub-parts 20a and 20b according to the actual phase change medium density or flow characteristics of the first and second regions 11a and 11b, so as to achieve more fine and efficient thermal management as a whole.

[0086] In some possible embodiments, referring to Figures 1 to 5 , Figure 11 , Figure 12 , Figure 14 and Figure 15 , the first and second sub-parts 20a and 20b are symmetrically arranged relative to the dividing surface L.

[0087] Thus, when the battery device 100 is in complex working conditions such as rapid acceleration, rapid deceleration, turning, etc., the phase change medium in the first region 11a and the second region 11b will bear the inertial force perpendicular to the direction of the partition surface L (i.e., the target direction W), and the first sub-portion 20a and the second sub-portion 20b can respectively adsorb a part of the phase change medium. Since the first sub-portion 20a and the second sub-portion 20b are symmetrically arranged relative to the partition surface L, the adsorption capacity of the phase change medium in the first region 11a and the second region 11b is equal, which can consistently resist the influence of the centrifugal force on the distribution of the phase change medium, avoid the temperature field deviation caused by the asymmetric structure, and significantly improve the lateral temperature uniformity and the stability of thermal management of the battery in the dynamic working condition, prolong the service life of the battery, and improve the customer experience.

[0088] In some possible embodiments, as shown in Figures 1 to 15 , Figures 1 to 15 , Figures 1 to 15 , Figures 1 to 11 and Figures 13 to 15 , the adsorption portion 20 includes the first sub-portion 20a and the second sub-portion 20b connected with each other, the first sub-portion 20a is arranged in the first region 11a, and the second sub-portion 20b is arranged in the second region 11b.

[0089] By integrally connecting the first sub-portion 20a and the second sub-portion 20b, the integrity and stability of the adsorption portion 20 can be effectively enhanced, and the first sub-portion 20a and the second sub-portion 20b can be integrally machined and connected, which is low in cost and reduces the number of components.

[0090] When the battery device 100 is in complex working conditions such as rapid acceleration, rapid deceleration, turning, etc., the phase change medium in the first region 11a and the second region 11b will bear the inertial force perpendicular to the direction of the partition surface L (i.e., the target direction W), and the first sub-portion 20a and the second sub-portion 20b can respectively adsorb a part of the phase change medium, and prevent the phase change medium from transferring from one region (for example, the first region 11a) to another region (the second region 11b) in a large range, so that the heat exchange between the heat exchange member 10 and the battery monomer 121 is more uniform and stable, and the performance degradation and the service life shortening of the battery monomer 121 caused by local overheating or overcooling are avoided. Ultimately, the temperature uniformity of the battery device 100 is good, the comprehensive performance of the battery device 100 is improved, the service life of the battery device 100 is prolonged, and the customer experience is improved.

[0091] In some possible embodiments, as shown in Figures 1 to 6 , the heat exchange flow channel 11 includes the first inner wall 11c and the second inner wall 11d arranged opposite to each other along the first direction X, and at least one of the first inner wall 11c and the second inner wall 11d is provided with at least part of the adsorption portion 20.

[0092] By setting the heat exchange flow channel 11 to include the first inner wall 11c and the second inner wall 11d oppositely arranged along the first direction X, and at least one of the first inner wall 11c and the second inner wall 11d is provided with at least a part of the adsorption part 20, when the battery device 100 is in a complex working condition such as sudden acceleration, sudden deceleration, turning, etc., the adsorption part 20 can use its capillary adsorption force to adsorb and fix the phase change medium in the heat exchange flow channel 11 in its pore or internal fine structure, thereby effectively inhibiting the phenomenon of local aggregation or loss of the phase change medium in the heat exchange flow channel 11 caused by inertial force, and further, the adsorption of the phase change medium by the adsorption part 20 can ensure that the phase change medium can be continuously and uniformly distributed in the heat exchange flow channel 11; and since the at least one adsorption part 20 is arranged on at least one of the first inner wall 11c and the second inner wall 11d, it can better act on the heat exchange with the side wall of the battery monomer 121 along the first direction X, thereby making the heat exchange between the heat exchange member 10 and the battery monomer 121 more uniform and stable, avoiding the performance degradation and shortening of the service life of the battery monomer 121 caused by local overheating or overcooling; ultimately ensuring good temperature uniformity of the battery device 100, improving its comprehensive performance and prolonging its service life, and improving customer experience.

[0093] Further, referring to Figure 8 As shown, at least one adsorption part 20 is arranged on one of the first inner wall 11c and the second inner wall 11d close to the battery monomer 121.

[0094] By setting the heat exchange flow channel 11 to include the first inner wall 11c and the second inner wall 11d oppositely arranged along the first direction X, and at least one adsorption part 20 is arranged on one of the first inner wall 11c and the second inner wall 11d close to the battery monomer 121, when the battery device 100 is in a complex working condition such as sudden acceleration, sudden deceleration, turning, etc., the adsorption part 20 can use its capillary adsorption force to adsorb and fix the phase change medium in the heat exchange flow channel 11 in its pore or internal fine structure, thereby effectively inhibiting the phenomenon of local aggregation or loss of the phase change medium in the heat exchange flow channel 11 caused by inertial force, and further, the adsorption of the phase change medium by the adsorption part 20 can ensure that the phase change medium can be continuously and uniformly distributed in the heat exchange flow channel 11; and since the at least one adsorption part 20 is arranged on at least one of the first inner wall 11c and the second inner wall 11d close to the battery monomer 121.

[0095] Here, it can be that the first inner wall 11c is relatively closer to the battery monomer 121, or it can be that the second inner wall 11d is relatively closer to the battery monomer 121, for the convenience of description, in the following embodiments, the first inner wall 11c is described as the side wall of the first inner wall 11c and the second inner wall 11d close to the battery monomer 121.

[0096] Since the first inner wall 11c is in direct contact with the battery monomer 121, the heat conduction path of the battery monomer 121 to the heat exchange member 10 is the shortest, so that the heat of the battery monomer 121 can be directly transmitted into the heat exchange flow channel 11 and efficiently exchanged with the phase change medium adsorbed in the adsorption part 20, thereby improving the heat exchange efficiency of the heat exchange member 10 and significantly reducing the heat transfer thermal resistance; further, the phase change medium can be effectively prevented from being separated from the surface of the first inner wall 11c close to the battery monomer 121 due to complex working conditions such as sudden acceleration, sudden deceleration, turning, etc., avoiding the risk of local overheating of the corresponding area of the battery monomer 121, and avoiding the performance degradation and service life shortening of the battery monomer 121 due to local overheating or overcooling; finally, the temperature uniformity of the battery device 100 is good, the comprehensive performance is improved, the service life is prolonged, and the customer experience is improved.

[0097] In some possible embodiments, referring to Figures 1 to 6 As shown, the heat exchange flow channel 11 further includes a third inner wall 11e and a fourth inner wall 11f arranged opposite along the target direction W; the first inner wall 11c, the third inner wall 11e, the second inner wall 11d and the fourth inner wall 11f are sequentially connected end to end;

[0098] At least one of the third inner wall 11e and the second inner wall 11d is provided with at least part of the adsorption part 20.

[0099] In the embodiments of the present application, when the battery device 100 is in complex working conditions such as sudden acceleration, sudden deceleration, turning, etc., the adsorption part 20 can use its capillary adsorption force to adsorb and fix the phase change medium in the heat exchange flow channel 11 in its pores or internal fine structure, thereby effectively inhibiting the phenomenon of local aggregation or loss of the phase change medium in the heat exchange flow channel 11 due to inertial force, and further, the adsorption of the adsorption part 20 to the phase change medium can ensure that the phase change medium can be continuously and uniformly distributed in the heat exchange flow channel 11; and by providing at least part of the adsorption part 20 on at least one of the first inner wall 11c and the second inner wall 11d, and providing at least part of the adsorption part 20 on at least one of the third inner wall 11e and the second inner wall 11d; not only can better act on the heat exchange with the side wall of the battery monomer 121 along the first direction X, but also make the distribution of the phase change medium on the inner wall of the heat exchange flow channel 11 more uniform, so that the heat exchange between the heat exchange member 10 and the battery monomer 121 is more uniform and stable, avoiding the performance degradation and service life shortening of the battery monomer 121 due to local overheating or overcooling; finally, the temperature uniformity of the battery device 100 is good, the comprehensive performance is improved, the service life is prolonged, and the customer experience is improved.

[0100] In some possible embodiments, referring to Figure 8 , and Figures 1 to 6As shown, the battery cell 121 includes a housing 126, an electrode assembly 124, and an electrode terminal 125.

[0101] The electrode assembly 124 is accommodated in the housing 126, the electrode terminal 125 is electrically connected with the electrode assembly 124, and the electrode terminal 125 is disposed on a top end surface of the housing 126 along the first direction X.

[0102] The heat exchange member 10 is disposed on a bottom end surface of the battery cell 121 away from the electrode terminal 125 along the first direction X.

[0103] Specifically, the housing 126 includes an end cover 122 and a shell 123.

[0104] The end cover 122 refers to a component that covers the opening of the shell 123 to isolate the internal environment of the electrode assembly 124 from the external environment. Without limitation, the shape of the end cover 122 can be adapted to the shape of the shell 123 to fit the shell 123. Alternatively, the end cover 122 can be made of a material with certain hardness and strength, such as aluminum alloy, so that the end cover 122 is less likely to deform when subjected to extrusion and collision, allowing the battery cell 121 to have higher structural strength and improved safety performance. The end cover 122 can be provided with functional components such as the electrode terminal 125. The electrode terminal 125 can be used to electrically connect with the electrode assembly 124 for outputting or inputting the electrical energy of the battery cell 121. In some embodiments, the end cover 122 can also be provided with a pressure relief mechanism for relieving the internal pressure when the internal pressure or temperature of the battery cell 121 reaches a threshold value. The material of the end cover 122 can also be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the embodiments of the present application do not make special limitations thereon. In some embodiments, an insulating member can also be provided on the inner side of the end cover 122, which can be used to isolate the electrical connection components in the shell 123 from the end cover 122 to reduce the risk of short circuit. Exemplarily, the insulating member can be plastic, rubber, etc.

[0105] The shell 123 is a component for cooperating with the end cover 122 to form an internal environment of the battery monomer 121, wherein the formed internal environment can be used to accommodate the electrode assembly 124, electrolyte and other components. The shell 123 and the end cover 122 can be independent components, and an opening can be provided on the shell 123, and the end cover 122 is made to cover the opening to form the internal environment of the battery monomer 121. Without limitation, the end cover 122 and the shell 123 can also be integrated, specifically, the end cover 122 and the shell 123 can form a common connecting surface before other components enter the shell, and when it is necessary to seal the internal environment of the shell 123, the end cover 122 is made to cover the shell 123. The shell 123 can be various shapes and various sizes, such as a cuboid, a cylinder, a hexagonal prism, etc. Specifically, the shape of the shell 123 can be determined according to the specific shape and size of the electrode assembly 124. The material of the shell 123 can be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the embodiments of the present application do not make special limitations thereon.

[0106] The electrode assembly 124 is a component in which electrochemical reactions occur in the battery monomer 121. One or more electrode assemblies 124 can be contained in the shell 123. The electrode assembly 124 is mainly formed by winding or stacking 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 positive electrode sheet and the negative electrode sheet have a portion with active material constituting a main body of the electrode assembly 124, and a portion without active material of the positive electrode sheet and the negative electrode sheet respectively constituting a tab (not shown). The positive electrode tab and the negative electrode tab can be located together at one end of the main body or respectively at two ends of the main body. In the charging and discharging process of the battery device, the positive active material and the negative active material react with the electrolyte, and the tab connects the electrode terminal 125 to form a current loop.

[0107] In the embodiments of the present application, the electrode terminal 125 is arranged on the top end surface of the shell 126 along the first direction X, and the heat exchange member 10 is arranged on the bottom end surface of the battery monomer 121 away from the electrode terminal 125 along the first direction X. In this way, on the one hand, the bottom end surface of the battery monomer 121 along the first direction X is used as a heat conduction surface to connect the heat exchange member 10, which can provide a flat, wide and stable contact area for the heat exchange member 10, ensuring an efficient and uniform heat conduction path between the heat exchange member 10 and the battery monomer 121; on the other hand, the heat exchange member 10 and the electrode terminal 125 are respectively located at opposite ends, which can effectively optimize the space design, avoid structural interference, improve the overall space utilization and structural compactness, and is also conducive to standardization and manufacturing.

[0108] In the embodiments of the present application, the first direction X is the height direction of the battery monomer 121.

[0109] Those skilled in the art should know that the battery cell 121 can also include other functional components to achieve its charging and discharging functions, which will not be described here.

[0110] In some possible embodiments, referring to Figure 8 , and Figures 1 to 6 , the adsorption part 20 includes a plurality of layers of wire meshes 21; all the wire meshes 21 are sequentially stacked along the first direction X of the heat exchange member 10 to adsorb the phase change medium by capillary action.

[0111] The adjacent two layers of wire meshes 21 can be connected by welding.

[0112] By stacking the plurality of layers of wire meshes 21, an adsorption part 20 with a three-dimensional mesh pore structure is formed, and the surface area and dense three-dimensional mesh pores of each wire mesh 21 can generate strong capillary force, thereby greatly enhancing the adsorption capacity and fixing ability of the adsorption part 20 for the phase change medium. In this way, the phase change medium can be effectively adsorbed between the fine meshes of the adsorption part 20 formed by stacking the plurality of layers of wire meshes 21, and when the battery device 100 is in complex working conditions such as sudden acceleration, sudden deceleration, turning, etc., the adsorption part 20 can use its capillary adsorption force to adsorb and fix the phase change medium in the heat exchange flow channel 11 in its pores or internal fine structure, thereby effectively inhibiting the phenomenon of local aggregation or loss of the phase change medium in the heat exchange flow channel 11 due to inertial force. Further, the adsorption of the adsorption part 20 to the phase change medium can ensure that the phase change medium can be continuously and uniformly distributed in the heat exchange flow channel 11, thereby making the heat exchange between the heat exchange member 10 and the battery cell 121 more uniform and stable.

[0113] In some possible embodiments, referring to Figure 8 , and Figures 1 to 7 , the wire mesh 21 includes an aluminum wire mesh, a stainless steel wire mesh, and a copper wire mesh.

[0114] In this way, the wire mesh 21 uses aluminum, copper or stainless steel materials with high thermal conductivity or high strength, which not only ensures that the adsorption part 20 has excellent thermal conductivity to quickly transfer heat, but also meets the requirements of corrosion resistance, structural strength and lightweight in different application scenarios.

[0115] In some possible embodiments, referring to Figures 1 to 7 , and Figures 1 to 7As shown, the wire diameter of the wire mesh 21 is 0.05mm~0.5mm. In this way, the adsorption part 20 can form extremely dense and uniform capillary channels through a large number of fibers with a wire diameter of 0.05mm~0.5mm, thereby generating a strong enough capillary force to firmly adsorb the phase change medium, and thus the adsorption part 20 can use its capillary adsorption force to adsorb and fix the phase change medium in the pores or internal fine structure of the heat exchange flow channel 11 under complex working conditions such as sudden acceleration, sudden deceleration, and turning.

[0116] In some possible embodiments, referring to Figures 1 to 6 , and Figure 9 As shown, the mesh count of the wire mesh 21 is 100 mesh~500 mesh.

[0117] In this way, the adsorption part 20 can obtain a larger specific surface area through the wire mesh structure, thereby improving the heat exchange capacity and obtaining better structural rigidity and pore connectivity, ensuring that the phase change medium can flow in the wire mesh 21, and avoiding the problem of insufficient liquid locking capacity caused by too low mesh count.

[0118] In some possible embodiments, referring to Figure 10 As shown, the adsorption part 20 is formed by sintering metal powder to adsorb the phase change medium through the capillary action of the powder pores.

[0119] In this way, the adsorption part 20 is produced by a metal powder sintering process, and the inside of the adsorption part 20 is formed into a network-like porous structure with a three-dimensional interconnected micropore, so that the adsorption part 20 has a huge specific surface area and a complex and tortuous capillary channel, thereby making the adsorption part 20 have a strong capillary force. When the battery device 100 is in complex working conditions such as sudden acceleration, sudden deceleration, and turning, the adsorption part 20 can use its capillary adsorption force to adsorb and fix the phase change medium in the heat exchange flow channel 11 in its pores or internal fine structure; and finally make the heat exchange of the heat exchange member 10 and the battery monomer 121 more uniform and stable, avoid the performance degradation and shortening of the service life of the battery monomer 121 caused by local overheating or overcooling; and finally ensure the uniformity of the temperature of the battery device 100, improve the comprehensive performance and prolong the service life of the battery device 100, and improve the customer experience.

[0120] In some possible embodiments, referring to Figures 1 to 15 As shown, the adsorption part 20 is formed by sintering at least one of aluminum and copper.

[0121] Specifically, the adsorption part 20 can be formed by sintering aluminum alone, by sintering copper alone, or by sintering both aluminum and copper, and the specific design is subject to the design.

[0122] In the embodiments of the present application, the adsorption part 20 is made of aluminum and / or copper with high thermal conductivity as the sintered base material, so that the adsorption part 20 can not only have excellent liquid locking ability, but also quickly conduct the heat generated by the battery monomer 121 to the adsorbed phase change medium, so that the heat exchange between the heat exchange member 10 and the battery monomer 121 is more uniform and stable, avoiding the performance degradation and shortening of the service life of the battery monomer 121 due to local overheating or overcooling. Ultimately, it ensures that the temperature uniformity of the battery device 100 is good, improves its comprehensive performance and prolongs its service life, and improves the customer experience.

[0123] In some possible embodiments, referring to Figures 1 to 10 As shown, the porosity of the adsorption part 20 is 30% to 60%.

[0124] In the embodiments of the present application, the porosity of the adsorption part 20 during sintering is accurately limited to the range of 30% to 60%, so as to balance the adsorption and liquid locking functions and permeability, and ensure that the adsorption part 20 composed of sintered metal powder has a large enough specific surface area and complex capillary micropores, so that it can generate strong capillary force to adsorb the phase change medium, thereby effectively inhibiting the phenomenon of local aggregation or loss of the phase change medium in the heat exchange channel 11 due to inertial force. In addition, it can also avoid the problems of excessive flow resistance caused by too low porosity or insufficient capillary force and structural strength caused by too high porosity.

[0125] Optionally, the porosity of the adsorption part 20 is 40% to 50%, so that the adsorption part 20 has good capillary adsorption capacity, heat conduction capacity and structural rigidity, so that the heat exchange between the heat exchange member 10 and the battery monomer 121 is more uniform and stable.

[0126] In some possible embodiments, referring to Figure 6 , Figures 1 to 10 and Figure 6 As shown, a plurality of grooves 22 are formed on the inner side surface of the heat exchange channel 11. All the grooves 22 are the adsorption part 20, and each groove 22 adsorbs the phase change medium by capillary action.

[0127] In the embodiments of the present application, the grooves 22 can be arranged in a staggered manner or in a side-by-side manner with intervals.

[0128] In the embodiments of the present application, a plurality of grooves 22 are directly machined on the inner side surface of the heat exchange channel 11, so that the adsorption part 20 and the heat exchange member 10 constitute an integrated whole structure. The plurality of grooves 22 densely distributed in the heat exchange channel 11 can generate capillary adsorption force by their inherent grooves, so as to effectively adsorb and guide the phase change medium to be distributed along the grooves 22. In this way, the phenomenon of local aggregation or loss of the phase change medium in the heat exchange channel 11 due to inertial force can be inhibited under dynamic working conditions of the vehicle, and the temperature uniformity is improved.

[0129] Especially need to be explained, this kind of integral molding with heat exchange piece 10 adsorption part 20 Not only simplifies production process, reduces manufacturing cost, simplifies the number of parts and avoids falling off, It can also improve the heat transfer capacity, so that the heat generated by the battery monomer 121 can be efficiently transferred to the phase change medium absorbed by the groove 22 through the heat exchange piece 10, so that the heat exchange between the heat exchange piece 10 and the battery monomer 121 is more uniform and stable, Avoid the performance degradation and short service life of the battery monomer 121 due to local overheating or overcooling; Ultimately ensure that the temperature uniformity of the battery device 100 is good, improve its comprehensive performance and prolong its service life, improve customer experience.

[0130] In some possible embodiments, referring to Figures 1 to 8 As shown, the heat exchange flow channel 11 includes a plurality of straight sections 14 and a plurality of connecting sections 15.

[0131] The straight sections 14 extend along the second direction Z, and all the straight sections 14 are arranged side by side and spaced apart along the third direction Y of the heat exchange piece 10. The connecting sections 15 respectively communicate the two ends of the adjacent two straight sections 14 to combine to form the heat exchange flow channel 11. The groove 22 is arranged on at least one of the first inner wall 11c and the second inner wall 11d in the straight section 14. The second direction Z, the first direction X and the third direction Y are arranged intersecting each other.

[0132] By arranging the heat exchange flow channel 11 to include a plurality of straight sections 14 extending along the second direction Z and a connecting section 15 communicating the plurality of straight sections 14, a winding path is formed, so that the phase change medium can flow through the entire heat exchange piece 10 in an orderly and sufficient manner in the heat exchange flow channel 11, ensuring the comprehensiveness of heat exchange coverage.

[0133] By arranging the groove 22 as the adsorption part 20 on the first inner wall 11c and / or the second inner wall 11d of the straight section 14, it can better act on the heat exchange with the side wall of the battery monomer 121 along the first direction X, so that the heat exchange between the heat exchange piece 10 and the battery monomer 121 is more uniform and stable, Avoid the performance degradation and short service life of the battery monomer 121 due to local overheating or overcooling; Ultimately ensure that the temperature uniformity of the battery device 100 is good, improve its comprehensive performance and prolong its service life, improve customer experience.

[0134] Optionally, along the first direction X, the groove depth of the groove 22 is 0.4mm~0.6mm. Specifically, the groove depth of the groove 22 is 0.5mm.

[0135] Optionally, along the first direction X, the groove width of the adsorption part 20 is 0.4mm~0.6mm. Specifically, the groove width of the groove 22 is 0.5mm.

[0136] Optionally, the length of the groove 22 along the second direction Z is 100mm-300mm.

[0137] Optionally, the cross section of the groove 22 is triangular or rectangular.

[0138] In some possible embodiments, referring to Figures 1 to 8 As shown, the width A of the adsorption part 20 and the width B of the heat exchange flow channel 11 satisfy A / B=0.8-1.0.

[0139] In the embodiments of the present application, by limiting the ratio of the width A of the adsorption part 20 to the width B of the heat exchange flow channel 11 to be within the range of 0.8-1.0, it is ensured that the adsorption part 20 can fully cover or even substantially fill the flow cross section of the entire heat exchange flow channel 11 in the lateral width (i.e. the left-right direction in Figure 9 This way, most or even all of the phase change medium in the heat exchange flow channel 11 must pass through or closely adhere to the capillary structure of the adsorption part 20 when flowing, thereby ensuring that the adsorption part 20 plays its capillary adsorption role and effectively inhibits the phenomenon of local aggregation or loss of the phase change medium in the heat exchange flow channel 11 caused by inertial force; the heat exchange between the heat exchange part 10 and the battery monomer 121 is more uniform and stable, and the performance degradation and service life shortening of the battery monomer 121 caused by local overheating or overcooling are avoided; ultimately, the temperature uniformity of the battery device 100 is good, the comprehensive performance of the battery device 100 is improved, the service life of the battery device 100 is prolonged, and the customer experience is improved.

[0140] In some possible embodiments, referring to Figure 10 As shown, along the first direction X, the thickness C of the adsorption part 20 and the height D of the heat exchange flow channel 11 satisfy C / D=0.1-0.3.

[0141] By limiting the thickness C of the adsorption part 20 to the height D of the heat exchange flow channel 11 to be within the range of 0.1-0.3, the lower limit of 0.1 ensures that the adsorption part 20 has sufficient thickness in the height direction (i.e. the up-down direction in ​ This way, a stable and effective three-dimensional capillary structure can be formed inside the adsorption part 20, and reliable capillary force is generated by the adsorption part 20 to adsorb and closely adhere to the phase change medium on the heat exchange wall surface, thereby effectively inhibiting the separation of the phase change medium under acceleration.

[0142] The upper limit of 0.3 ensures that the adsorption part 20 is still a relatively thin layered structure in the height direction relative to the heat exchange flow channel 11; thereby reserving sufficient and unobstructed flow channel space below the adsorption part 20, significantly reducing the flow resistance of the phase change medium in the heat exchange flow channel 11, and avoiding problems such as excessive system pressure drop and uneven flow distribution caused by excessive thickness of the adsorption part 20.

[0143] It needs to be understood that the capillary action of the adsorption part 20 is mainly concentrated on the heat exchange wall surface near the heat exchange flow channel 11 close to the battery monomer 121, so that the heat generated by the battery monomer 121 can be quickly transmitted to the adsorbed phase change medium through the relatively thin adsorption part 20 in the shortest path, thereby improving the heat exchange efficiency, making the heat exchange between the heat exchange member 10 and the battery monomer 121 more uniform and stable, and avoiding the performance degradation and shortening of the service life of the battery monomer 121 due to local overheating or overcooling; ultimately ensuring that the temperature uniformity of the battery device 100 is good, improving its comprehensive performance and prolonging its service life, and improving the customer experience.

[0144] In some possible embodiments, referring to ​ As shown in the figure, the heat exchange member 10 includes a heat exchange plate 12 and a flow channel plate 13. The battery monomer 121 is in thermal conductive connection with the heat exchange plate 12; the heat exchange plate 12 is used to carry the battery monomer 121.

[0145] The flow channel plate 13 is formed with a groove, the heat exchange plate 12 is covered on the flow channel plate 13, and the heat exchange plate 12 and the groove are jointly formed into the heat exchange flow channel 11; at least one adsorption part 20 is arranged on the area of the heat exchange plate 12 corresponding to the heat exchange flow channel 11.

[0146] By setting the split type heat exchange plate 12 and the flow channel plate 13 and combining them to form the heat exchange member 10, the pre-set flow channel can be formed on the flow channel plate 13 by stamping process, and finally it is folded and packaged with the heat exchange plate 12 as the carrying surface, so that it can jointly constitute a closed heat exchange flow channel 11; the process is mature, the cost is low, and the manufacturing and processing of large-area cooling plates can be easily realized.

[0147] And by directly arranging the adsorption part 20 on the inner surface of the heat exchange plate 12 corresponding to the heat exchange flow channel 11, a heat conduction path is established between the adsorption part 20 and the heat exchange plate 12 carrying the battery monomer 121; the heat generated by the battery monomer 121 is quickly conducted to the adsorption part 20 through the heat exchange plate 12, and is absorbed by the phase change medium adsorbed in the adsorption part 20, greatly improving the heat exchange efficiency.

[0148] This modular design also provides convenience for reliably fixing the adsorption part 20 (such as a silk screen or a sintered felt) on the heat exchange plate 12 by welding or gluing before the plate is combined, ensuring the long-term reliability and durability of the product structure.

[0149] In some possible embodiments, referring to ​ As shown in the figure, the adsorption part 20 and the heat exchange plate 12 are connected by welding or gluing. In this way, before the heat exchange plate 12 and the flow channel plate 13 are combined, the adsorption part 20 can be reliably fixed on the heat exchange plate 12 by welding or gluing, which is convenient to assemble and reliable in connection, ensuring the long-term reliability and service life of the battery device 100.

[0150] In some possible embodiments, referring to ​ and ​ As shown, the heat exchange member 10 can be a bent pipe; that is, the heat exchange member 10 is a bent pipe formed by the straight section 14 and the connecting section 15.

[0151] Specifically, the bottom of the bent pipe is integrally punched with a plurality of grooves 22 as the adsorption portion 20.

[0152] In the embodiments, the plurality of grooves 22 are integrally punched in the bottom of the bent pipe, so that the adsorption portion 20 and the body of the heat exchange member 10 form an integrated structure; the grooves 22 can be staggered or arranged side by side at intervals. The plurality of grooves 22 densely distributed in the heat exchange flow channel 11 can generate capillary adsorption force by virtue of the inherent grooves, so as to effectively adsorb and guide the phase change medium to be distributed along the grooves 22. In this way, the phenomenon of local aggregation or loss of the phase change medium in the heat exchange flow channel 11 caused by inertial force can be inhibited under the dynamic working condition of the vehicle, and the temperature uniformity is improved.

[0153] The second aspect of the embodiments provides a power utilization device, which comprises the battery device 100 described above, and the battery device 100 is used to provide electric energy for the power utilization device.

[0154] The technical features of the above-described embodiments can be combined arbitrarily. To make the description concise, all possible combinations of the technical features in the above-described embodiments are not described, however, as long as the combinations of the technical features do not exist contradictory, it should be considered that the combinations are within the scope of the present disclosure.

[0155] The above-described embodiments only express several implementation manners of the present disclosure, and the description is relatively specific and detailed, but it should not be understood as a limitation on the patent scope of the present disclosure. It should be noted that, for those skilled in the art, some modifications and improvements can be made without departing from the concept of the present disclosure, and these modifications and improvements are within the protection scope of the present disclosure. Therefore, the patent protection scope of the present disclosure should be subject to the appended claims.

Claims

1. A battery device, characterized by, The battery device comprises: a battery cell (121); a heat exchange member (10) disposed on a side wall of the battery cell (121) along a first direction (X), the heat exchange member (10) internally forming a heat exchange flow channel (11) for flowing of a phase change medium; a cross section of the heat exchange flow channel (11) has a maximum width (W1) in a target direction (W), a partition surface (L) perpendicular to the target direction (W) is disposed from a midpoint of the maximum width (W1), the partition surface (L) divides the heat exchange flow channel (11) into a first region (11a) and a second region (11b); the target direction (W) is perpendicular to the first direction (X) and a flow direction of the phase change medium in the heat exchange flow channel (11); the cross section of the heat exchange flow channel (11) is defined as a cross section of the heat exchange flow channel (11) perpendicular to the flow direction of the heat exchange flow channel (11); an adsorption portion (20) connected to the heat exchange member (10) and located in the heat exchange flow channel (11), the adsorption portion (20) is configured to adsorb part of the phase change medium by capillary action; part of the adsorption portion (20) is disposed on an inner side wall of the first region (11a), and part of the adsorption portion (20) is disposed on an inner side wall of the second region (11b).

2. The battery device according to claim 1, characterized by The adsorption portion (20) comprises a first sub-portion (20a) and a second sub-portion (20b) disposed at intervals, the first sub-portion (20a) is located in the first region (11a), and the second sub-portion (20b) is located in the second region (11b).

3. The battery device of claim 2, wherein, The first sub-portion (20a) and the second sub-portion (20b) are symmetrically arranged relative to the partition surface (L).

4. The battery device of claim 1, wherein The adsorption portion (20) comprises a first sub-portion (20a) and a second sub-portion (20b) connected to each other, the first sub-portion (20a) is disposed in the first region (11a), and the second sub-portion (20b) is disposed in the second region (11b).

5. The battery device of claim 1, wherein The cross section of the heat exchange flow channel (11) is circular, square or trapezoidal.

6. The battery device of claim 1, wherein The heat exchange flow channel (11) comprises a first inner wall (11c) and a second inner wall (11d) oppositely disposed along the first direction (X); At least one of the first inner wall (11c) and the second inner wall (11d) is provided with at least part of the adsorption portion (20).

7. The battery device of claim 6, wherein The heat exchange flow channel (11) further comprises a third inner wall (11e) and a fourth inner wall (11f) oppositely disposed along the target direction (W); the first inner wall (11c), the third inner wall (11e), the second inner wall (11d) and the fourth inner wall (11f) are sequentially connected end to end; At least one of the third inner wall (11e) and the second inner wall (11d) is provided with at least part of the adsorption portion (20).

8. The battery device of claim 1, wherein The battery cell (121) comprises an outer shell (126), an electrode assembly (124) and an electrode terminal (125); The electrode assembly (124) is accommodated in the shell (126), the electrode terminal (125) is electrically connected with the electrode assembly (124), and the electrode terminal (125) is arranged on the top end surface of the shell (126) along the first direction (X); The heat exchange member (10) is arranged on the bottom end surface of the battery monomer (121) away from the electrode terminal (125) along the first direction (X).

9. The battery device of claim 6, wherein, At least one of the adsorption portions (20) is arranged on one of the first inner wall (11c) and the second inner wall (11d) close to the battery monomer (121).

10. The battery device of claim 1, wherein The heat exchange member (10) comprises a heat exchange plate (12) and a flow channel plate (13); The battery monomer (121) is in thermal conductive connection with the heat exchange plate (12); The flow channel plate (13) is formed with a groove, the heat exchange plate (12) is covered on the flow channel plate (13), and the heat exchange plate (12) and the groove are jointly formed into the heat exchange flow channel (11); At least one of the adsorption portions (20) is arranged on the region of the heat exchange plate (12) corresponding to the heat exchange flow channel (11).

11. The battery device of claim 6, wherein, The inner side surface of the heat exchange flow channel (11) is formed with a plurality of grooves (22); All the grooves (22) are used as the adsorption portions (20), and each of the grooves (22) adsorbs the phase change medium through capillary action.

12. The battery device of claim 11, wherein, The heat exchange flow channel (11) comprises a plurality of straight flow sections (14) and a plurality of connecting sections (15); The straight flow sections (14) extend along a second direction (Z), and all the straight flow sections (14) are arranged side by side and spaced apart along a third direction (Y) of the heat exchange member (10); The connecting sections (15) respectively communicate two ends of two adjacent straight flow sections (14) to combine to form the heat exchange flow channel (11); The grooves (22) are arranged on at least one of the first inner wall (11c) and the second inner wall (11d) in the straight flow section (14); The second direction (Z), the first direction (X) and the third direction (Y) are arranged to intersect with each other.

13. The battery device of claim 12, wherein, Along the first direction (X), the groove depth of the groove (22) is 0.4mm-0.6mm; and / or, Along the first direction (X), the groove width of the groove (22) is 0.4mm-0.6mm; and / or, Along the second direction (Z), the length of the groove (22) is 100mm-300mm.

14. The battery device of claim 12, wherein, The heat exchange member (10) is a bent pipe jointly formed by the straight flow sections (14) and the connecting sections (15).

15. The battery device of claim 1, wherein, The adsorption portion (20) comprises a plurality of layers of wire meshes (21); all the wire meshes (21) are sequentially stacked along the first direction (X) of the heat exchange member (10) to adsorb the phase change medium through capillary action.

16. The battery device of claim 15, wherein, The wire mesh (21) is formed by at least one of aluminum wire, stainless steel wire and copper wire being transversely and longitudinally woven; and / or, The wire diameter of the wire mesh (21) is 0.05mm-0.5mm; and / or, The mesh number of the wire mesh (21) is 100mesh-500mesh.

17. The battery device of claim 15, wherein, Two adjacent layers of the wire mesh (21) are connected by welding.

18. The battery device of claim 1, wherein, The adsorption part (20) is formed by sintering of metal powder to adsorb the phase change medium by capillary action of powder pores.

19. The battery device of claim 18, wherein, The adsorption part (20) is formed by sintering of powder of at least one of aluminum and copper; and / or, The porosity of the adsorption part (20) is 30% to 60%.

20. The battery device according to any one of claims 15 to 19, wherein Along the target direction (W), the width A of the adsorption part (20) and the width B of the heat exchange flow channel (11) satisfy A / B=0.8 to 1.

0.

21. The battery device according to any one of claims 15 to 19, wherein Along the first direction (X), the thickness C of the adsorption part (20) and the height D of the heat exchange flow channel (11) satisfy C / D=0.1 to 0.

3.

22. The battery device according to any one of claims 15 to 19, wherein The adsorption part (20) and the inner side wall of the heat exchange flow channel (11) are connected by welding or gluing.

23. An electrical device, comprising: The battery device comprises the battery device according to any one of claims 1 to 22.

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