Cooler, battery device, cooling system and electric equipment

Abstract

The utility model discloses a cooler, a battery device, a cooling system and electric equipment, and belongs to the field of batteries. The cooler comprises a vapor chamber and a spraying device, and the vapor chamber defines an inner cavity and comprises a heat exchange surface for exchanging heat with a battery; and a nozzle of the spraying device is positioned in the inner cavity and is used for spraying a cooling working medium. The vapor chamber and the spraying device are arranged, the nozzle of the spraying device is located in the inner cavity of the vapor chamber, the nozzle can atomize the cooling working medium, the atomized cooling working medium evenly makes contact with the heat exchange face of the vapor chamber to absorb heat and be gasified, and the contact uniformity of the atomized cooling working medium and the heat exchange face can be improved; therefore, the temperature of the heat exchange surface can be uniformly reduced, and the consistency of the battery temperature is improved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of batteries, and particularly relates to a cooler, a battery device, a cooling system and a power consumption equipment. BACKGROUND

[0002] The battery generates a certain amount of heat in a discharging state. When the heat is too high to cause the battery temperature to exceed a normal working temperature range value, the battery performance is affected, and the cycle life of the battery is reduced. Therefore, the battery needs to be cooled to achieve an optimal state.

[0003] In the related art, the battery cooling scheme has the risk of reducing the consistency of the battery temperature and the leakage of the cooling working medium, and needs to be improved. CONTENT OF THE INVENTION

[0004] The application aims to at least solve one of the technical problems in the prior art. To this end, the application provides a cooler, a battery device, a cooling system and a power consumption equipment, which can improve the consistency of the battery temperature and reduce the risk of leakage of the cooling working medium.

[0005] In a first aspect, the application provides a cooler, comprising:

[0006] A vapor chamber defines an inner cavity and comprises a heat exchange surface for heat exchange with a battery;

[0007] A spraying device, a nozzle of the spraying device is located in the inner cavity, and is used to spray a cooling working medium.

[0008] According to the cooler of the application, the vapor chamber and the spraying device are arranged, the nozzle of the spraying device is located in the inner cavity of the vapor chamber, the nozzle can atomize the cooling working medium, the atomized cooling working medium uniformly contacts the heat exchange surface of the vapor chamber to absorb heat and vaporize, the atomized cooling working medium can improve the uniformity of contact with the heat exchange surface, thereby uniformly reducing the temperature of the heat exchange surface and improving the consistency of the battery temperature.

[0009] According to an embodiment of the application, the spraying device comprises:

[0010] An inlet flow channel is at least partially located in the inner cavity, and the inlet flow channel in the inner cavity extends along the extension direction of the vapor chamber, the nozzle comprises a plurality of nozzles, and the plurality of nozzles are distributed apart along the extension direction of the inlet flow channel;

[0011] An outlet flow channel is in communication with the inner cavity.

[0012] According to an embodiment of the application, the spraying device further comprises:

[0013] An inlet manifold, the inlet flow channel comprises a plurality of inlet flow channels arranged apart, and the plurality of inlet flow channels are in communication with the inlet manifold;

[0014] an outlet manifold, the outlet manifold comprising a plurality of outlet flow channels arranged in a spaced apart manner, each of the plurality of outlet flow channels being in communication with the outlet manifold;

[0015] a joint comprising a first port and a second port, the inlet manifold being connected to the first port, and each of the outlet manifolds being connected to the second port.

[0016] According to an embodiment of the present application, the plurality of inlet flow channels are uniformly distributed along the first direction; and / or,

[0017] the plurality of outlet flow channels are uniformly distributed along the first direction; and / or,

[0018] the plurality of inlet flow channels and the plurality of outlet flow channels are alternately and spaced apartly arranged.

[0019] According to an embodiment of the present application, a length of the outlet flow channel is less than a length of the inlet flow channel.

[0020] According to an embodiment of the present application, the vapor chamber comprises:

[0021] a cover;

[0022] a heat conducting plate, the cover and the heat conducting plate together defining an inner cavity, the spray device being mounted on at least one of the cover and the heat conducting plate, the heat conducting plate comprising a heat exchange surface for heat exchange with the battery;

[0023] According to an embodiment of the present application, the spray device is mounted on the cover, the cover being provided with a first mounting hole and a second mounting hole, the inlet flow channel being inserted into the first mounting hole, and the outlet flow channel being inserted into the second mounting hole.

[0024] According to an embodiment of the present application, the cover has at least one reinforcing structure, the reinforcing structure extending along an extension direction of the cover and being arranged between adjacent inlet flow channels.

[0025] In a second aspect, the present application provides a battery device, comprising a battery and the cooler according to any one of the above embodiments, the cooler being arranged on a side surface of the battery.

[0026] According to an embodiment of the present application, the cooler is arranged on an upper side surface of the battery along a height direction.

[0027] According to an embodiment of the present application, a nozzle flow rate of the cooler in a region close to a tab of the battery is greater than a nozzle flow rate of the cooler in other regions.

[0028] In a third aspect, the application provides a cooling system applied to the battery device in any of the above embodiments, the cooling system comprising a gas-liquid separator, a compressor, a heat exchanger and an expansion valve connected in sequence, wherein the outlet of the cooler of the battery device is connected to the inlet of the gas-liquid separator, and the inlet of the cooler of the battery device is connected to the outlet of the expansion valve.

[0029] According to one embodiment of the application, the application further comprises a vacuum pump, a first electromagnetic valve and a second electromagnetic valve.

[0030] The first outlet of the gas-liquid separator is connected to the inlet of the compressor through the vacuum pump, and the first electromagnetic valve is arranged between the first outlet of the gas-liquid separator and the vacuum pump.

[0031] The second outlet of the gas-liquid separator is connected to the inlet of the compressor, and the second electromagnetic valve is arranged between the second outlet of the gas-liquid separator and the inlet of the compressor.

[0032] According to one embodiment of the application, the application further comprises:

[0033] A temperature monitoring unit arranged in the battery device for detecting the temperature of the battery.

[0034] A first temperature pressure gauge arranged between the outlet of the cooler and the inlet of the gas-liquid separator.

[0035] A second temperature pressure gauge arranged between the compressor and the heat exchanger.

[0036] A third temperature pressure gauge arranged between the heat exchanger and the inlet of the cooler.

[0037] In a fourth aspect, the application provides a power consumption device comprising the battery device in any of the above embodiments and the cooling system in any of the above embodiments.

[0038] Additional aspects and advantages of the application will be made apparent from the following description of embodiments of the application, which is given by way of example only. BRIEF DESCRIPTION OF DRAWINGS

[0039] The above and / or additional aspects and advantages of the application will become apparent and be readily understood by considering the following detailed description of embodiments of the application, including the drawings, in which:

[0040] Figure 1 is one of the structural schematic diagrams of the cooler provided by the embodiments of the application;

[0041] Figure 2 is another of the structural schematic diagrams of the cooler provided by the embodiments of the application;

[0042] Figure 3 is a structural schematic diagram of an electrical device provided by an embodiment of the present application.

[0043] Reference signs:

[0044] The battery device 100,

[0045] The cooler 1, the uniform temperature plate 11, the inner cavity 111, the cover 112, the first mounting hole 1121, the second mounting hole 1122, the reinforcing structure 1123, the heat conduction plate 113;

[0046] The spray device 12, the nozzle 121, the inlet flow channel 122, the outlet flow channel 123, the inlet manifold 124, the outlet manifold 125, the joint 126;

[0047] The battery 2;

[0048] The gas-liquid separator 31, the compressor 32, the heat exchanger 33, the expansion valve 34, the vacuum pump 35, the first electromagnetic valve 36, the second electromagnetic valve 37, the temperature monitoring unit 38, the first temperature pressure gauge 39, the second temperature pressure gauge 40, the third temperature pressure gauge 41. DETAILED DESCRIPTION

[0049] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, in which the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as a limitation of the present application.

[0050] The following refers to Figures 1-3 The cooler 1, the battery device 100, the cooling system, and the electrical device of the embodiments of the present application are described.

[0051] The embodiments of the present application provide an electrical device using a battery or a battery device 100 or an energy storage device or an energy storage system as a power source. The electrical device can be, but is not limited to, a mobile phone, a tablet, a notebook computer, an electric toy, an electric tool, an electric car, an electric vehicle, a ship, and a spacecraft, etc. Among them, the electric toy can include a fixed or mobile electric toy, such as a game console, an electric car toy, an electric ship toy, and an electric plane toy, etc. The spacecraft can include an airplane, a rocket, a space shuttle, and a spacecraft, etc.

[0052] In the embodiments of the present application, the battery can be a secondary battery, which refers to a battery that can be activated by charging after the battery monomer is discharged.

[0053] The battery can be a lithium-ion battery, sodium-ion battery, sodium-lithium-ion battery, lithium metal battery, sodium metal battery, lithium-sulfur battery, magnesium-ion battery, nickel-metal hydride battery, nickel-cadmium battery, lead-acid battery, etc., and the embodiments of this application are not limited to this.

[0054] Batteries can be cylindrical, flat, cuboid, or other shapes, and this application embodiment is not limited to any of these. Battery cells are generally classified into three types according to their packaging method: cylindrical battery cells, square battery cells, and pouch battery cells, and this application embodiment is not limited to any of these types either.

[0055] like Figure 1 As shown, the cooler 1 in some embodiments of this application includes: a heat spreader 11 and a spray device 12.

[0056] The heat exchanger 11 defines an inner cavity 111 and includes a heat exchange surface for exchanging heat with the battery 2.

[0057] The heat spreader 11 can be made of a material with high thermal conductivity, such as metal. For example, the heat spreader 11 can be made of copper or aluminum.

[0058] The heat spreader 11 can be flat to facilitate placement on one side of the battery 2, increasing the heat conduction area with the battery 2 while reducing encroachment on the internal space of the battery device 100.

[0059] The heat exchange surface is located on one side of the heat spreader 11, and it can be made of thermally conductive materials such as metal to enhance the contact tightness with the surface of the battery 2 and the heat exchange efficiency.

[0060] The heat exchange surface can be directly attached to the surface of the battery pack, or the thermal resistance can be reduced by a thin thermal interface material (TIM), or it can form at least part of the sidewall of the heat exchange plate 11.

[0061] The spray device 12 has a nozzle 121 located in the inner cavity 111 for spraying out a cooling working fluid.

[0062] In some embodiments, the spray device 12 includes a high-pressure pump, a storage tank, a nozzle 121, and a control system. The storage tank contains a cooling medium, such as deionized water, ethylene glycol solution, or other low-viscosity, high-specific-heat-capacity liquids. The high-pressure pump is responsible for drawing the cooling medium from the storage tank and pressurizing it to a certain pressure so that the cooling medium can be sprayed into the inner cavity 111 in a mist form through the nozzle 121.

[0063] Nozzle 121 can be installed on the top or side of the inner cavity 111 of the heat exchange plate 11. The atomized cooling medium sprayed by nozzle 121 diffuses throughout the entire inner cavity 111, improving the uniformity and sufficiency of the contact between the cooling medium and the heat exchange surface. The droplets of the atomized cooling medium absorb heat and vaporize upon contact with the heat exchange surface, thereby improving the uniformity of the cooling of the heat exchange surface and thus uniformly cooling the battery 2.

[0064] Other structures of the spray device 12 can be installed outside the inner cavity 111 to reduce the encroachment on the effective space of the inner cavity 111 and improve the uniformity of contact between the inner wall of the inner cavity 111 and the atomizing cooling working fluid.

[0065] The number, position, and spray angle of the nozzles 121 can be set according to the installation position of the cooler 1 relative to the battery 2 and the cooling requirements of the battery 2, so as to achieve the best cooling effect and thermal uniformity.

[0066] In some embodiments, such as Figure 2 As shown, the nozzles 121 can be distributed in an array in the inner cavity 111 to achieve efficient atomization of the cooling working fluid, improve the cooling efficiency and temperature consistency of the heat exchange surface, thereby improving the cooling efficiency and temperature consistency of the battery 2.

[0067] One related technology involves using a liquid-cooled plate to cool the power battery. The coolant enters from one inlet of the liquid-cooled plate, absorbs heat, and flows out from the other outlet. As the coolant absorbs heat from the battery, its temperature rises, leading to a decrease in the coolant's cooling capacity. This results in a temperature difference between the battery's inlet and outlet on the liquid-cooled plate. If applied to an actual battery device 100, this would lead to low temperature uniformity within the battery device 100, reducing the battery's charge / discharge efficiency and cycle life.

[0068] Related technology two involves using a spray device 12 to directly spray the cooling medium onto the battery for cooling, which poses a high risk of cooling medium leakage. In addition, if there are impurities in the cooling medium, it may cause corrosion and short circuits in the battery and connecting pieces, which is not conducive to the long-term stable and safe operation of the battery.

[0069] According to the embodiment of this application, the cooler 1 is provided by setting a heat exchange plate 11 and a spray device 12. The nozzle 121 of the spray device 12 is located in the inner cavity 111 of the heat exchange plate 11. The nozzle 121 can atomize the cooling medium. The atomized cooling medium uniformly contacts the heat exchange surface of the heat exchange plate 11 to absorb heat and vaporize. The atomized cooling medium can improve the uniformity of contact with the heat exchange surface, thereby uniformly reducing the temperature of the heat exchange surface and improving the temperature consistency of the battery 2.

[0070] Compared to the solution of using a liquid cooling plate to cool the battery in related technology 1, this application uses an atomized cooling medium to uniformly cool the heat exchange surface to cool the battery 2, which can improve the temperature uniformity of the battery 2. Compared to the solution of using a spray device 12 to cool the battery in related technology 2, this application sets the nozzle 121 of the spray device 12 in the inner cavity 111 of the temperature equalization plate 11. The phase change of the atomized cooling medium in the inner cavity 111 of the spray device 12 limits the diffusion range of the cooling medium, reduces the risk of battery short circuit corrosion, and improves safety.

[0071] In some embodiments, such asFigure 1 and Figure 2 As shown in FIG. 1, the spray device 12 comprises an inlet flow channel 122 and an outlet flow channel 123.

[0072] The spray device 12 is composed of the inlet flow channel 122, the nozzle array 121 and the outlet flow channel 123, which work together to spray the cooling medium in the form of mist into the inner cavity 111 of the uniform temperature plate 11.

[0073] The inlet flow channel 122 is used to guide the cooling medium into the inner cavity 111. The inlet flow channel 122 is at least partially located in the inner cavity 111, and the inlet flow channel 122 located in the inner cavity 111 extends along the extension direction of the uniform temperature plate 11.

[0074] For example, the inlet flow channel 122 can comprise a plurality of inlet flow channels 122, which can extend along the length direction of the uniform temperature plate 11, and the plurality of inlet flow channels 122 can be arranged at intervals along the width direction of the uniform temperature plate 11.

[0075] For example, the inlet flow channel 122 can comprise a plurality of inlet flow channels 122, which can extend along the width direction of the uniform temperature plate 11, and the plurality of inlet flow channels 122 can be arranged at intervals along the length direction of the uniform temperature plate 11.

[0076] For example, the inlet flow channel 122 can comprise one inlet flow channel 122, which can extend spirally along the circumferential direction of the uniform temperature plate 11, and adjacent layers of inlet flow channels 122 are spaced apart.

[0077] The nozzle 121 comprises a plurality of nozzles 121, which are arranged at intervals along the extension direction of the inlet flow channel 122, so that the cooling medium can be uniformly sprayed along the entire length or width of the uniform temperature plate 11, thereby improving the uniformity of the diffusion of the cooling medium in the inner cavity 111 and the uniformity of the contact between the atomized cooling medium and the heat exchange surface, and thus improving the consistency of the temperature of the battery 2.

[0078] The cross-sectional shape of the inlet flow channel 122 can be designed as a circle, a rectangle or other shapes as needed to optimize the flow performance and pressure loss of the fluid. At the same time, the inner wall of the inlet flow channel 122 is treated to be smooth to reduce the resistance when the fluid flows.

[0079] In some embodiments, the cross-sectional shape of the inlet flow channel 122 is set as a rectangle, and the cross-section of the inlet flow channel 122 is flat-shaped to reduce the thickness of the uniform temperature plate 11, thereby reducing the occupation of the effective volume in the battery device 100.

[0080] The spray cooling medium is in contact with the heat exchange surface and vaporizes, the outlet flow channel 123 is in communication with the inner cavity 111, and is responsible for discharging the cooling medium mixed with gas and liquid from the inner cavity 111.

[0081] In this embodiment, the design of the outlet flow channels 123 takes into account the flow performance and pressure loss of the fluid to improve the smoothness of the cooling working medium inner cavity 111 outflow, reduce the accumulation of cooling working medium inside the inner cavity 111, while reducing the risk of unnecessary pressure caused by the accumulation of cooling working medium inside the inner cavity 111 to cause the uniform temperature plate 11 to expand and deform and damage the battery 2, improve safety.

[0082] The number and location of the outlet flow channels 123 can be adjusted according to the size and shape of the uniform temperature plate 11. For example, outlet flow channels 123 can be provided on both sides or one end of the uniform temperature plate 11 to balance the fluid pressure and flow in the inner cavity 111. At the same time, the cross-sectional shape and inner wall treatment of the outlet flow channels 123 also need to be optimized to reduce the resistance when the fluid flows.

[0083] In this embodiment, when the spray device 12 is started, the cooling working medium enters the inner cavity 111 through the inlet flow channel 122 and flows along the extension direction of the inlet flow channel 122. During the flow process, the cooling working medium is atomized and sprayed when passing through the nozzle 121 array, forming fine droplets. These droplets evaporate quickly and absorb the heat on the uniform temperature plate 11 and the heat exchange surface, thereby reducing the temperature of the battery 2. Subsequently, the gas-liquid mixed cooling working medium is discharged from the inner cavity 111 through the outlet flow channel 123, completing the entire cooling process.

[0084] In some embodiments, as shown in Figure 1 and Figure 2 The spray device 12 also includes an inlet manifold 124, an outlet manifold 125, and a joint 126. The spray device 12 is composed of the inlet manifold 124, a plurality of inlet flow channels 122, a plurality of nozzles 121, a plurality of outlet flow channels 123, the outlet manifold 125, and the joint 126. These components work together to introduce the cooling working medium from the inlet manifold 124, pass through the plurality of inlet flow channels 122 to the nozzles 121 to be sprayed, and finally pass through the plurality of outlet flow channels 123 to the outlet manifold 125 to be discharged.

[0085] The inlet manifold 124 is a centralized fluid passage for introducing the cooling working medium into the spray device 12 from the outside. In this embodiment, the inlet manifold 124 is connected to the external cooling working medium supply system of the spray device 12.

[0086] The inlet flow channel 122 includes a plurality of inlet flow channels 122 arranged at intervals, and each of the plurality of inlet flow channels 122 is in communication with the inlet manifold 124.

[0087] The inlet manifold 124 is connected to a plurality of inlet flow channels 122 arranged at intervals, so that the cooling working medium can be uniformly distributed along the length or width direction of the uniform temperature plate 11. Each inlet flow channel 122 is in direct communication with the inlet manifold 124, thereby receiving the cooling working medium from the inlet manifold 124.

[0088] The outlet flow channels 123 are arranged in multiple, spaced-apart groups, each of which communicates with the outlet manifold 125.

[0089] The outlet flow channels 123 are responsible for discharging the sprayed cooling medium from the inner cavity 111. All of the outlet flow channels 123 communicate with the outlet manifold 125. The outlet manifold 125 is a centralized fluid passage that collects and discharges the cooling medium from the various outlet flow channels 123.

[0090] The joint 126 is a key component that connects the inlet manifold 124, the outlet manifold 125, and the external cooling medium supply and discharge systems.

[0091] The joint 126 includes a first port and a second port. The first port is connected to the inlet manifold 124 and is responsible for introducing the cooling medium into the spray device 12. The second port is connected to the outlet manifold 125 and is responsible for discharging the sprayed cooling medium from the spray device 12. The joint 126 is designed to consider the fluid flow performance and sealing performance to reduce the risk of cooling medium leakage or unnecessary pressure loss during flow.

[0092] In this embodiment, when the spray device 12 is activated, the cooling medium first enters the inlet manifold 124 through the joint 126. Then, the cooling medium is distributed into the multiple inlet flow channels 122 and flows along the extension direction of the inlet flow channels 122. During the flow, the cooling medium is atomized and sprayed out when passing through the nozzle 121 array, forming fine droplets. These droplets quickly expand and evaporate, absorbing heat on the uniform plate 11 and the heat exchange surface, thereby reducing the temperature of the battery 2.

[0093] Subsequently, the sprayed cooling medium enters the outlet manifold 125 through the multiple outlet flow channels 123. Finally, the cooling medium is discharged from the spray device 12 through the second port of the joint 126, completing the entire cooling process.

[0094] The joint 126 can be connected to the inlet manifold 124 and the outlet manifold 125 by welding.

[0095] The spray device 12 of this embodiment has the advantages of compact structure, high cooling efficiency, uniform flow distribution, and easy maintenance. By introducing components such as the inlet manifold 124, the outlet manifold 125, and the joint 126, the efficiency and flexibility of the cooling medium flow and distribution in the spray device 12 are improved. At the same time, this design also considers factors such as fluid flow performance and sealing performance, improving the stability and reliability of the system.

[0096] In some embodiments, as Figure 1 and Figure 2As shown, the plurality of inlet flow channels 122 are evenly distributed along the first direction; the plurality of outlet flow channels 123 are evenly distributed along the first direction; the plurality of inlet flow channels 122 and the plurality of outlet flow channels 123 are alternately and spacedly distributed.

[0097] The first direction can be the length direction or the width direction of the vapor chamber 11.

[0098] The present embodiment further refines the layout of the inlet flow channels 122 and the outlet flow channels 123 in the spray device 12, by evenly distributing along the first direction (e.g. the length direction of the vapor chamber 11) and alternately and spacedly arranging, to achieve more balanced fluid distribution and higher heat exchange efficiency.

[0099] The plurality of inlet flow channels 122 are evenly distributed along the first direction (e.g. the length direction of the vapor chamber 11). The spacing between adjacent inlet flow channels 122 is equal, so that the cooling working medium can flow evenly along the entire length direction of the vapor chamber 11, improving the consistency of the cooling working medium pressure and flow rate at each nozzle 121, thereby improving the uniformity of the diffused atomized cooling working medium.

[0100] Each inlet flow channel 122 is directly communicated with the inlet manifold 124 to receive the cooling working medium from the inlet manifold 124.

[0101] The plurality of outlet flow channels 123 are also evenly distributed along the first direction. The spacing between adjacent outlet flow channels 123 is equal, so that the cooling working medium can flow out evenly along the entire length direction of the vapor chamber 11, thereby improving the consistency of the temperature of the vapor chamber 11 along the first direction.

[0102] These outlet flow channels 123 are responsible for discharging the atomized cooling working medium from the inner cavity 111. Each outlet flow channel 123 is directly communicated with the outlet manifold 125 to deliver the cooling working medium to the outlet manifold 125.

[0103] In the present embodiment, the inlet flow channels 122 and the outlet flow channels 123 are alternately and spacedly distributed. That is, one inlet flow channel 122 is followed by one outlet flow channel 123, and then one inlet flow channel 122, and so on. This layout helps to balance the fluid pressure and flow in the inner cavity 111, and improves the uniformity and efficiency of the cooling working medium flowing through the array of nozzles 121, thereby achieving more uniform heat exchange.

[0104] In some embodiments, as shown in FIGS. 1A and 1B, the plurality of outlet flow channels 123 are evenly distributed along the first direction; the plurality of inlet flow channels 122 and the plurality of outlet flow channels 123 are alternately and spacedly distributed. Figure 1 and Figure 2 As shown, the plurality of inlet flow channels 122 are evenly distributed along the first direction; the plurality of outlet flow channels 123 are evenly distributed along the first direction; the plurality of inlet flow channels 122 and the plurality of outlet flow channels 123 are alternately and spacedly distributed.

[0105] The plurality of outlet flow channels 123 are also evenly distributed along the first direction. The spacing between adjacent outlet flow channels 123 is equal, allowing the cooling medium to flow out evenly along the entire length of the uniform temperature plate 11, thereby achieving temperature uniformity along the first direction of the uniform temperature plate 11.

[0106] These outlet flow channels 123 are responsible for discharging the sprayed cooling medium from the inner cavity 111. Each outlet flow channel 123 is in direct communication with the outlet manifold 125, delivering the cooling medium to the outlet manifold 125.

[0107] In this embodiment, the inlet flow channels 122 and the outlet flow channels 123 are arranged in an alternating and spaced-apart manner. That is, one inlet flow channel 122 is followed by one outlet flow channel 123, and then one inlet flow channel 122, and so on. This layout helps to balance the fluid pressure and flow in the inner cavity 111, improving the uniformity and efficiency of the cooling medium flowing through the array of nozzles 121, thereby achieving more uniform heat exchange.

[0108] In some embodiments, the plurality of inlet flow channels 122 are evenly distributed along the first direction; the plurality of inlet flow channels 122 and the plurality of outlet flow channels 123 are arranged in an alternating and spaced-apart manner.

[0109] The plurality of inlet flow channels 122 are evenly distributed along the first direction (e.g., the length direction of the uniform temperature plate 11). The spacing between adjacent inlet flow channels 122 is equal, allowing the cooling medium to flow evenly along the entire length of the uniform temperature plate 11, improving the uniformity of the cooling medium in terms of pressure and flow at each nozzle 121, thereby improving the uniformity of the diffused atomized cooling medium.

[0110] Each inlet flow channel 122 is in direct communication with the inlet manifold 124, receiving the cooling medium from the inlet manifold 124.

[0111] In this embodiment, the inlet flow channels 122 and the outlet flow channels 123 are arranged in an alternating and spaced-apart manner. That is, one inlet flow channel 122 is followed by one outlet flow channel 123, and then one inlet flow channel 122, and so on. This layout helps to balance the fluid pressure and flow in the inner cavity 111, improving the uniformity and efficiency of the cooling medium flowing through the array of nozzles 121, thereby achieving more uniform heat exchange.

[0112] In some embodiments, the plurality of inlet flow channels 122 are evenly distributed along the first direction; the plurality of outlet flow channels 123 are evenly distributed along the first direction.

[0113] The plurality of inlet flow channels 122 are evenly distributed along the first direction (e.g. the length direction of the vapor chamber 11). The spacing between adjacent inlet flow channels 122 is equal, so that the cooling working fluid can flow evenly along the entire length direction of the vapor chamber 11, improving the consistency of the pressure and flow rate of the cooling working fluid at each nozzle 121, thereby improving the uniformity of the diffusion of the atomized cooling working fluid.

[0114] Each inlet flow channel 122 is in direct communication with the inlet manifold 124 to receive the cooling working fluid from the inlet manifold 124.

[0115] The plurality of outlet flow channels 123 are also evenly distributed along the first direction. The spacing between adjacent outlet flow channels 123 is equal, so that the cooling working fluid can flow out evenly along the entire length direction of the vapor chamber 11, thereby improving the consistency of the temperature of the vapor chamber 11 along the first direction.

[0116] The outlet flow channels 123 are responsible for discharging the atomized cooling working fluid from the inner cavity 111. Each outlet flow channel 123 is in direct communication with the outlet manifold 125 to deliver the cooling working fluid to the outlet manifold 125.

[0117] In some embodiments, the plurality of inlet flow channels 122 are evenly distributed along the first direction.

[0118] The plurality of inlet flow channels 122 are evenly distributed along the first direction (e.g. the length direction of the vapor chamber 11). The spacing between adjacent inlet flow channels 122 is equal, so that the cooling working fluid can flow evenly along the entire length direction of the vapor chamber 11, improving the consistency of the pressure and flow rate of the cooling working fluid at each nozzle 121, thereby improving the uniformity of the diffusion of the atomized cooling working fluid.

[0119] Each inlet flow channel 122 is in direct communication with the inlet manifold 124 to receive the cooling working fluid from the inlet manifold 124.

[0120] In some embodiments, the plurality of inlet flow channels 122 and the plurality of outlet flow channels 123 are alternately and spacedly distributed.

[0121] In the present embodiment, the inlet flow channels 122 and the outlet flow channels 123 are alternately and spacedly distributed. That is, one inlet flow channel 122 is followed by one outlet flow channel 123, and then one inlet flow channel 122, and so on. This layout helps to balance the fluid pressure and flow rate in the inner cavity 111, improving the uniformity and efficiency of the cooling working fluid flowing through the array of nozzles 121, thereby achieving more uniform heat exchange.

[0122] In some embodiments, the plurality of outlet flow channels 123 are evenly distributed along the first direction.

[0123] The plurality of outlet flow channels 123 are also evenly distributed along the first direction. The spacing between adjacent outlet flow channels 123 is equal, so that the cooling medium can flow out uniformly along the entire length direction of the uniform temperature plate 11, thereby ensuring the temperature consistency of the uniform temperature plate 11 along the first direction.

[0124] These outlet flow channels 123 are responsible for discharging the sprayed cooling medium from the inner cavity 111. Each outlet flow channel 123 is in direct communication with the outlet manifold 125 to deliver the cooling medium to the outlet manifold 125.

[0125] In some embodiments, the length of the outlet flow channel 123 is less than the length of the inlet flow channel 122, which can reduce the fluid resistance of the outlet flow channel 123, reduce the residence time and pressure loss of the fluid in the outlet flow channel 123, and make the gas-liquid mixed state of the cooling medium after heat exchange flow out of the inner cavity 111 more smoothly. At the same time, the shorter outlet flow channel 123 also helps to reduce material usage and manufacturing cost.

[0126] In some embodiments, as shown in FIG. 1, the uniform temperature plate 11 includes a cover 112 and a heat conduction plate 113, Figure 1

[0127] The heat conduction plate 113 cooperates with the cover 112 to define the inner cavity 111, which is a space in the uniform temperature plate 11 for accommodating and transporting the cooling medium.

[0128] The spray device 12 is mounted on at least one of the cover 112 and the heat conduction plate 113. The spray device 12 is inserted into the cover 112, the heat conduction plate 113, or a part is mounted on the cover 112 and a part is mounted on the heat conduction plate 113.

[0129] For example, interfaces or hole positions for mounting the spray device 12 are designed on the surface of the cover 112 or the heat conduction plate 113. These interfaces or hole positions are in sealed connection with components such as the inlet manifold 124 and the outlet manifold 125 of the spray device 12, so that the spray device 12 can be stably and reliably mounted on the cover 112.

[0130] The heat conduction plate 113 includes a heat exchange surface for heat exchange with the battery 2.

[0131] The heat exchange surface is the part of the heat conduction plate 113 that contacts the battery 2, and has a certain area and shape to improve the contactability and heat transfer efficiency with the battery 2. The heat exchange surface can be designed with protrusions, grooves, or microchannels, etc. to increase the contact area and heat exchange efficiency with the battery 2. At the same time, the material selection and surface treatment of the heat exchange surface should also consider the compatibility and corrosion resistance with the battery 2.

[0132] ​The heat-conducting plate 113 can be made of a material with high thermal conductivity, such as copper or aluminum, to improve the speed and consistency of heat transfer. One side of the heat-conducting plate 113 (i.e., the heat exchange surface) is in close contact with the battery for absorbing the heat generated by the battery. The other side exchanges heat with the cooling medium in the inner cavity 111, transferring the heat to the cooling medium.

[0133] In this embodiment, when the battery 2 generates heat, the heat is transferred to the cooling medium in the inner cavity 111 through the heat exchange surface of the heat-conducting plate 113. The spray device 12 sprays the cooling medium in the form of mist, which fully exchanges heat with the heat exchange surface. The cooling medium absorbs heat and evaporates into steam, which is discharged from the uniform heat plate 11 through the outlet flow channel 123. Subsequently, the steam is condensed into liquid in the external cooling system and is pumped back to the spray device 12 for recycling. In this way, the uniform heat plate 11 can continuously transfer the heat generated by the battery 2 to the cooling medium and discharge it through the external cooling system, thereby maintaining the temperature of the battery 2 stable.

[0134] In some embodiments, as shown in FIG. 1B, the spray device 12 is installed on the cover 112, and the spray device 12 does not block the heat-conducting plate 113, so that the cooling medium can uniformly cover the heat exchange surface, avoiding local overheating or overcooling and improving the consistency of heat exchange. Figure 1

[0135] The cover 112 is the upper structure of the uniform heat plate 11, and the surface of the cover 112 is designed with interfaces or hole positions for installing the spray device 12. These interfaces or hole positions match the components such as the inlet manifold 124 and the outlet manifold 125 of the spray device 12, so that the spray device 12 can be stably and reliably installed on the cover 112.

[0136] In some embodiments, as shown in FIG. 1B, the spray device 12 is installed on the cover 112, and the spray device 12 does not block the heat-conducting plate 113, so that the cooling medium can uniformly cover the heat exchange surface, avoiding local overheating or overcooling and improving the consistency of heat exchange.

[0137] In this embodiment, the spray device 12 is directly installed on the cover 112, and the nozzle array 121 can face the heat exchange surface, so that the cooling medium can reach the heat exchange surface more quickly and fully exchange heat.

[0138] In some embodiments, as shown in FIG. 1B, the spray device 12 is installed on the cover 112, and the spray device 12 does not block the heat-conducting plate 113, so that the cooling medium can uniformly cover the heat exchange surface, avoiding local overheating or overcooling and improving the consistency of heat exchange. Figure 1

[0139] ​​The number and position of the first mounting holes 1121 are adapted to the inlet flow channel 122, the first mounting holes 1121 are in sealing connection with the inlet flow channel 122, and the first mounting holes 1121 and the inlet flow channel 122 can be connected by an O-ring, a metal sealing ring, a threaded connection, or the like, or can be connected by welding.

[0140] The number and position of the second mounting holes 1122 are adapted to the outlet flow channel 123, the outlet flow channel 123 is in sealing connection with the second mounting holes 1122, and the outlet flow channel 123 and the second mounting holes 1122 can be connected by an O-ring, a metal sealing ring, a threaded connection, or the like, or can be connected by welding.

[0141] In the embodiment, by designing specific mounting holes, the installation process of the spray device 12 is more convenient and fast, and the installation difficulty and cost are reduced.

[0142] In some embodiments, as shown in Figure 2 The cover body has at least one reinforcing structure 1123, the reinforcing structure 1123 extends along the extension direction of the cover body, and the reinforcing structure 1123 forms a structure similar to a skeleton or a rib, effectively enhancing the overall structural performance of the cover body.

[0143] For example, the reinforcing structure 1123 can be a reinforcing rib or a protrusion, and the reinforcing structure 1123 can extend along the length direction or the width direction of the cover body.

[0144] For example, the reinforcing structure 1123 can be linear, curved, polygonal, or any other suitable shape.

[0145] For example, the reinforcing structure 1123 can extend along the length or width direction of the cover body and be uniformly or as needed distributed on the cover body. The layout and number of the reinforcing structure 1123 should be determined according to the size, shape of the cover body, and the external load to be borne.

[0146] In some embodiments, as shown in Figure 2 The reinforcing structure 1123 is consistent with the extension direction of the inlet flow channel 122 and is arranged between adjacent inlet flow channels 122, which can reduce interference with the inlet flow channel 122.

[0147] In some embodiments, the cooling working medium can be R134a or R1234yf, etc.

[0148] The embodiment of the present application also provides a battery device 100, which comprises a battery 2 and the cooler 1 of any of the above embodiments, and the cooler 1 is arranged on the side surface of the battery 2.

[0149] The cooler 1 can be arranged on any side surface of the battery 2, for example, the cooler 1 covers a larger side surface of the battery 2 to increase the heat exchange area and improve the heat exchange efficiency.

[0150] Exemplarily, in the case that the battery 2 is a blade battery, the cooler 1 can be arranged on one or both of the upper surface and the lower surface of the battery.

[0151] In some embodiments, the heat-conducting plate 113 of the cooler 1 can be tightly attached to the surface of the battery 2 through a heat-conducting glue, a heat-conducting pad or other appropriate heat-conducting medium, so as to improve the speed of heat transfer from the battery 2 to the cooler 1.

[0152] According to the battery device 100 provided by the embodiments of the present application, by arranging the cooler 1, the cooler 1 is arranged with the uniform temperature plate 11 and the spraying device 12, the nozzle 121 of the spraying device 12 is located in the inner cavity 111 of the uniform temperature plate 11, the nozzle 121 can atomize the cooling working medium, the atomized cooling working medium uniformly contacts the heat exchange surface of the uniform temperature plate 11 to absorb heat and vaporize, the atomized cooling working medium can improve the uniformity of contact with the heat exchange surface, so as to uniformly reduce the temperature of the heat exchange surface and improve the consistency of the temperature of the battery 2.

[0153] In some embodiments, the cooler 1 is arranged on the upper side of the battery 2 along the height direction, the heat exchange surface of the cooler 1 contacts the upper side of the battery 2, and the nozzle 121 of the spraying device 12 sprays downward, so that the liquid drops of the refrigeration working medium can be automatically diffused to the heat exchange surface more quickly by using the spraying liquid drops, and the heat exchange efficiency is improved.

[0154] In some embodiments, the flow rate of the nozzle 121 of the cooler 1 close to the region of the tab of the battery 2 is greater than the flow rate of the nozzle 121 of the cooler 1 away from the region of the tab of the battery 2.

[0155] Exemplarily, along the distribution direction of the plurality of inlet flow channels 122, the number of nozzles 121 located on the inlet flow channels 122 at both ends is greater than the number of nozzles 121 located on the inlet flow channels 122 between the two ends.

[0156] Exemplarily, along the distribution direction of the plurality of inlet flow channels 122, the flow rate of the nozzle 121 located on the inlet flow channels 122 at both ends is greater than the flow rate of the nozzle 121 located on the inlet flow channels 122 between the two ends.

[0157] It can be understood that the heat generation of the region of the tab of the battery 2 is greater than that of other regions of the battery 2, and the flow rate of the nozzle 121 of the cooler 1 close to the region of the tab of the battery 2 is set to be greater than the flow rate of the nozzle 121 of the cooler 1 in other regions, which can be set according to the heat generation characteristics of different batteries 2 to improve the temperature consistency of the battery 2.

[0158] As Figure 3As shown, the embodiments of the present application also provide a cooling system applied to the battery device 100 of any of the above embodiments, which comprises a gas-liquid separator 31, a compressor 32, a heat exchanger 33 and an expansion valve 34 connected in sequence, and the outlet of the cooler 1 of the battery device 100 is connected to the inlet of the gas-liquid separator 31, and the inlet of the cooler 1 of the battery device 100 is connected to the outlet of the expansion valve 34.

[0159] The nozzle array 121 of the spray device 12 is located in the inner cavity 111 of the vapor chamber 11 and faces the heat exchange surface of the heat conduction plate 113. When the spray device 12 is started, the cooling working medium in the cooling system enters the joint 126 from the outlet of the expansion valve 34 and is atomized into fine droplets at the nozzles 121. These droplets will evaporate quickly and absorb the heat on the heat exchange surface of the heat conduction plate 113, thereby reducing the temperature of the battery 2. Subsequently, the evaporated cooling working medium is discharged from the inner cavity 111 to the gas-liquid separator 31 of the external cooling system for condensation and recycling.

[0160] In some embodiments, as shown in Figure 3 The cooling system further comprises a vacuum pump 35, a first electromagnetic valve 36 and a second electromagnetic valve 37.

[0161] The first outlet of the gas-liquid separator 31 is connected to the inlet of the compressor 32 through the vacuum pump 35, and the first electromagnetic valve 36 is arranged between the first outlet of the gas-liquid separator 31 and the vacuum pump 35; the second outlet of the gas-liquid separator 31 is connected to the inlet of the compressor 32, and the second electromagnetic valve 37 is arranged between the second outlet of the gas-liquid separator 31 and the inlet of the compressor 32.

[0162] The first outlet and the second outlet of the gas-liquid separator 31 are both gas phase outlets.

[0163] When the BMS system detects that the required cooling power of the battery device 100 is normal, the first electromagnetic valve 36 is closed and the second electromagnetic valve 37 is opened, and the refrigeration working medium discharged from the cooler 1 directly reaches the inlet of the compressor 32; when the BMS system detects that the required cooling power of the battery device 100 is large, the first electromagnetic valve 36 is opened and the second electromagnetic valve 37 is closed, and the refrigeration working medium discharged from the cooler 1 directly reaches the inlet of the compressor 32 after passing through the vacuum pump 35.

[0164] In some embodiments, as shown in Figure 3 The cooling system further comprises a temperature monitoring unit 38, a first temperature pressure gauge 39, a second temperature pressure gauge 40 and a third temperature pressure gauge 41.

[0165] The temperature monitoring unit 38 is arranged in the battery device and is used for detecting the temperature of the battery; the temperature monitoring unit 38 can be provided in plurality, and the plurality of temperature monitoring units 38 are arranged on the battery.

[0166] The first temperature pressure gauge 39 is arranged between the outlet of the cooler 1 and the inlet of the gas-liquid separator 31, and is used to detect the temperature pressure between the outlet of the cooler 1 and the inlet of the gas-liquid separator 31.

[0167] The second temperature pressure gauge 40 is arranged between the compressor 32 and the heat exchanger 33, and is used to detect the temperature pressure between the compressor 32 and the heat exchanger 33.

[0168] The third temperature pressure gauge 41 is arranged between the heat exchanger 33 and the inlet of the cooler 1, and is used to detect the temperature pressure between the heat exchanger 33 and the inlet of the cooler 1.

[0169] In the embodiment, when the BMS system detects that the battery temperature exceeds the cooling start temperature T1 through the temperature monitoring unit 38, the compressor 32 is started; the cooling working medium passes through the compressor 32 and the heat exchanger 33, and then enters the cooler 1 to be atomized into uniform droplets, and flash evaporation occurs in the inner cavity 111, and the battery heat is absorbed; when the BMS system detects that the battery temperature is lower than the cooling stop temperature T2 through the temperature monitoring unit 38, the compressor 32 is stopped.

[0170] When the battery is in a fast charging working condition or a high-power discharging working condition, the BMS system requires a large cooling power, the second electromagnetic valve 37 is closed, the first electromagnetic valve 36 is opened, and the vacuum pump 35 is opened, so that the gas in the inner cavity 111 is pumped out, thereby reducing the pressure in the inner cavity 111 of the cooler 1, increasing the superheat degree of the refrigerant, thereby increasing the evaporation rate, increasing the cooling rate, and meeting the cooling demand in different working conditions.

[0171] The application further provides a battery device 100 and a cooling system.

[0172] The battery device 100 provided by the application can realize the functions of the battery device 100 and the cooling system.

[0173] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a particular sequential or chronological order. It should be understood that the data thus used can be interchanged, where appropriate, so that the embodiments of the present application can be carried out in other than the order shown or described herein, and that the objects distinguished by "first", "second", etc. are generally of a class and are not limited in number. For example, the first object can be one or more. In addition, "and / or" in the specification and claims means at least one of the connected objects, and the character " / ", generally means that the front and rear associated objects are in an "or" relationship.

[0174] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0175] In the description of the present application, "first feature" and "second feature" can include one or more of the features.

[0176] In the description of the present application, "a plurality of" means two or more.

[0177] In the description of the present application, "above" or "below" of a first feature with respect to a second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them.

[0178] In the description of the present application, "above", "over" and "on" of a first feature with respect to a second feature include that the first feature is directly above and obliquely above the second feature, or only means that the first feature is horizontally higher than the second feature.

[0179] In the description of the present application, the description with reference to the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the exemplary description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0180] While the embodiments of the application have been shown and described, it is to be understood that the embodiments can be varied, modified, substituted and changed by those skilled in the art without departing from the principles and spirit of the application, the scope of which is defined by the claims and their equivalents.

Claims

1. A cooler, characterized in that, include: A heat exchange plate defines an inner cavity and includes a heat exchange surface for exchanging heat with the battery. A spraying device, wherein the nozzle of the spraying device is located in the inner cavity and is used to spray out a cooling working fluid; The spraying device includes: An inlet flow channel is at least partially located in the inner cavity, and the inlet flow channel located in the inner cavity extends along the extension direction of the heat spreader. The nozzles include a plurality of nozzles, which are spaced apart along the extension direction of the inlet flow channel. An outlet flow channel communicates with the inner cavity; The length of the outlet channel is less than the length of the inlet channel.

2. The cooler according to claim 1, characterized in that, The spraying device also includes: An inlet manifold, wherein the inlet flow channel comprises a plurality of spaced-apart channels, all of which are connected to the inlet manifold; The outlet manifold includes multiple outlet channels spaced apart, and each of the multiple outlet channels is connected to the outlet manifold. The connector includes a first port and a second port, with the inlet manifold connected to the first port and the outlet manifold connected to the second port.

3. The cooler according to claim 2, characterized in that, The plurality of said inlet channels are evenly distributed along the first direction; and / or, The plurality of said outlet channels are evenly distributed along the first direction; and / or, The multiple inlet channels and the multiple outlet channels are distributed alternately and spaced apart.

4. The cooler according to any one of claims 1-3, characterized in that, The temperature distribution plate includes: Cover; A heat-conducting plate, together with the cover, defines an inner cavity. The spray device is installed in at least one of the cover and the heat-conducting plate. The heat-conducting plate includes a heat exchange surface for exchanging heat with the battery.

5. The cooler according to claim 4, characterized in that, The spraying device is installed on the cover, which has a first mounting hole and a second mounting hole. The inlet channel is inserted into the first mounting hole, and the outlet channel is inserted into the second mounting hole.

6. The cooler according to claim 4 or 5, characterized in that, The cover has at least one reinforcing structure that extends along the extension direction of the cover and is disposed between adjacent inlet channels.

7. A battery device, characterized in that, It includes a battery and a cooler as described in any one of claims 1-6, the cooler being disposed on the side of the battery.

8. The battery device according to claim 7, characterized in that, The cooler is disposed on the upper side of the battery along the height direction.

9. The battery device according to claim 7 or 8, characterized in that, The nozzle flow rate in the region of the cooler closest to the battery tabs is greater than the nozzle flow rate in other regions of the cooler.

10. A cooling system, characterized in that, The cooling system of the battery device applied to any one of claims 7-9 comprises a gas-liquid separator, a compressor, a heat exchanger and an expansion valve connected in sequence, wherein the outlet of the cooler of the battery device is connected to the inlet of the gas-liquid separator and the inlet of the cooler of the battery device is connected to the outlet of the expansion valve.

11. The cooling system according to claim 10, characterized in that, Also includes: Vacuum pump, first solenoid valve and second solenoid valve; The first outlet of the gas-liquid separator is connected to the inlet of the compressor via the vacuum pump, and the first solenoid valve is located between the first outlet of the gas-liquid separator and the vacuum pump. The second outlet of the gas-liquid separator is connected to the inlet of the compressor, and the second solenoid valve is located between the second outlet of the gas-liquid separator and the inlet of the compressor.

12. The cooling system according to claim 10 or 11, characterized in that, Also includes: A temperature monitoring unit is installed in the battery device to detect the temperature of the battery; A first temperature and pressure gauge is installed between the outlet of the cooler and the inlet of the gas-liquid separator; A second temperature and pressure gauge is installed between the compressor and the heat exchanger; A third temperature and pressure gauge is installed between the inlet of the heat exchanger and the inlet of the cooler.

13. An electrical appliance, characterized in that, It includes the battery device according to any one of claims 7-9 and the cooling system according to any one of claims 10-12.

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