Thermal management device and energy storage equipment

Abstract

The invention relates to a thermal management device and energy storage equipment. The heat management device comprises a heat exchange system, a refrigerant system and an air cooling system, the heat exchange system comprises a heat exchange channel, the heat exchange system further comprises a first heat exchanger, the refrigerant system comprises a refrigerant medium channel, the refrigerant medium channel is configured to be in heat exchange fit with the heat exchange channel, the refrigerant system further comprises a second heat exchanger, and the air cooling system forms an air supply channel; wherein the first heat exchanger comprises a first part, the second heat exchanger comprises a second part, the orthographic projection of the first part in the first direction and the orthographic projection of the second part in the first direction are mutually overlapped and form a first area, and at least one of the first heat exchanger and the second heat exchanger further comprises a third part; the orthographic projection of the third part in the first direction has a second area located outside the first area, and the ventilation quantity per unit area of at least one of the first part and the second part is larger than the ventilation quantity per unit area of the third part.

Description

Technical Field

[0001] The present application relates to the technical field of energy storage equipment, and in particular to a thermal management device and an energy storage device. Background Art

[0002] As one of the cleanest and most environmentally friendly energy storage methods, battery energy storage equipment has been increasingly widely used. In energy storage equipment, thermal management devices directly affect the overall temperature control, service life and safety performance of the energy storage equipment. At present, energy storage equipment mainly uses air supply to dissipate heat. When there are multiple heat exchangers with different sizes, multiple heat exchangers are arranged in the air supply channel in sequence along the air supply direction, resulting in unsatisfactory heat dissipation effect of the heat exchanger, which in turn causes the heat dissipation effect of the battery to deteriorate, affecting the working performance of the battery. Summary of the invention

[0003] In view of the defects of the prior art, the purpose of this application is to provide a thermal management device and an energy storage device, which can effectively solve the problem of poor heat dissipation effect of the heat exchanger: In a first aspect, the present application provides a thermal management device, comprising: A heat exchange system, the heat exchange system comprising a heat exchange channel for heat exchange medium to flow, and the heat exchange system further comprising a first heat exchanger connected to the heat exchange channel; A refrigerant system, the refrigerant system comprising a refrigerant medium channel for circulating the refrigerant, the refrigerant medium channel being configured to cooperate with the heat exchange channel in heat exchange by means of a refrigerant phase change, and the refrigerant system further comprising a second heat exchanger connected to the refrigerant medium channel; An air cooling system, wherein the air cooling system forms an air supply channel for gas circulation; The first heat exchanger and the second heat exchanger are respectively arranged in the air supply channel, the first heat exchanger includes a first part, the second heat exchanger includes a second part, the orthographic projection of the first part along the first direction and the orthographic projection of the second part along the first direction overlap with each other and form a first area, at least one of the first heat exchanger and the second heat exchanger also includes a third part, the orthographic projection of the third part along the first direction has a second area arranged outside the first area, and the ventilation volume per unit area of ​​at least one of the first part and the second part is greater than the ventilation volume per unit area of ​​the third part; The first direction is the direction of airflow in the air supply channel, or the first direction is arranged at an angle to the direction of airflow in the air supply channel.

[0004] According to the thermal management device of the present application, it can be used to dissipate heat for the battery device. When the heat dissipation demand of the battery device is small, the heat exchange system can be used to exchange heat with the battery device alone. When the heat dissipation demand of the battery device is large, the refrigerant system can be used to cooperate with the heat exchange system to exchange heat with the battery device. Wherein, the first heat exchanger and the second heat exchanger are respectively arranged in the air supply channel, and the heat is dissipated by the air cooling system. Since the positive projections of the first part and the second part along the first direction overlap with each other, the air flow resistance flowing through the first part and the second part along the first direction increases, the air flow rate slows down, and the heat dissipation efficiency of the first part and the second part decreases. Therefore, the ventilation volume per unit area of ​​at least one of the first part and the second part is set to be greater than the ventilation volume per unit area of ​​the third part, thereby reducing the air flow resistance flowing through the first part and the second part, increasing the air flow rate, and making the heat dissipation efficiency of the first part, the second part and the third part tend to be consistent, thereby improving the heat dissipation consistency at each position of the first heat exchanger and the second heat exchanger, and then improving the heat dissipation effect of the first heat exchanger and the second heat exchanger.

[0005] In some embodiments of the present application, the first heat exchanger includes a plurality of first fins spaced apart along a second direction, and a first flow area for gas flow is formed between any two adjacent first fins. The second heat exchanger includes a plurality of second fins spaced apart along a second direction, and a second flow area for gas flow is formed between any two adjacent second fins, wherein the second direction intersects with the first direction.

[0006] By providing a plurality of first fins and forming a first flow area for gas flow between two adjacent first fins, the airflow can contact the first fins to dissipate heat when passing through the first flow area, thereby improving the heat dissipation efficiency of the first heat exchanger. By providing a plurality of second fins and forming a second flow area for gas flow between two adjacent second fins, the airflow can contact the second fins to dissipate heat when passing through the second flow area, thereby improving the heat dissipation efficiency of the second heat exchanger.

[0007] In some embodiments of the present application, the orthographic projection of the first heat exchanger along the first direction is completely within the range of the orthographic projection of the second heat exchanger along the first direction, and the second heat exchanger has a third portion.

[0008] By forming the third portion on the second heat exchanger, the heat dissipation efficiency of the first heat exchanger and the second heat exchanger can be improved only by adjusting the spacing size of some second fins on the second heat exchanger along the second direction.

[0009] In some embodiments of the present application, the size of the second flow zone in the second part along the second direction is larger than the size of the second flow zone in the third part along the second direction; and / or, the size of the first flow zone along the second direction is larger than the size of the second flow zone in the third part along the second direction.

[0010] By setting the size of the second circulation area in the second part along the second direction to be larger than the size of the second circulation area in the third part along the second direction, the ventilation volume per unit area of ​​the second circulation area can be increased, thereby reducing the airflow resistance flowing through the second part, increasing the airflow velocity, and further improving the heat dissipation effect of the first heat exchanger and the second heat exchanger. By setting the size of the first circulation area along the second direction to be larger than the size of the second circulation area in the third part along the second direction, the ventilation volume per unit area of ​​the first circulation area can be increased, thereby reducing the airflow resistance flowing through the second part, increasing the airflow velocity, and further improving the heat dissipation effect of the first heat exchanger and the second heat exchanger.

[0011] In some embodiments of the present application, an orthographic projection of a portion of the first heat exchanger along the first direction has an overlapping area with an orthographic projection of a portion of the second heat exchanger along the first direction, and the first heat exchanger and the second heat exchanger each have a third portion.

[0012] By respectively providing the third part on the first heat exchanger and the second heat exchanger, it is convenient to adjust the relative positions of the first heat exchanger and the second heat exchanger.

[0013] In some embodiments of the present application, a flow-blocking structure is further provided in the air supply channel, the orthographic projection of the flow-blocking structure along the first direction has an overlapping area with the second area, and the flow-blocking structure is provided on the windward side of the first heat exchanger or the second heat exchanger.

[0014] By arranging a flow-blocking structure on the windward side of the first heat exchanger and the second heat exchanger, the flow-blocking structure can block the airflow flowing to the third part, thereby reducing the flow rate of the airflow flowing through the third part, making the heat dissipation efficiency of the first part, the second part and the third part tend to be consistent, thereby improving the heat dissipation consistency at various positions of the first heat exchanger and the second heat exchanger, and further improving the heat dissipation effect of the first heat exchanger and the second heat exchanger.

[0015] In some embodiments of the present application, the first heat exchanger is disposed on the windward side of the second heat exchanger.

[0016] By arranging the first heat exchanger on the windward side of the second heat exchanger, the airflow in the air supply channel first acts on the first heat exchanger, thereby improving the heat dissipation effect of the first heat exchanger.

[0017] In some embodiments of the present application, the refrigerant system further includes a third heat exchanger and a compressor. The compressor, the second heat exchanger and the third heat exchanger are respectively arranged in the refrigerant medium channel, and the third heat exchanger is configured to cooperate with the heat exchange channel for heat exchange.

[0018] By coordinating the heat exchange between the third heat exchanger and the heat exchange channel, the refrigerant system can adjust the temperature of the heat exchange medium in the heat exchange channel through the third heat exchanger, thereby dissipating the heat of the battery device through the heat exchange channel, thereby improving the heat dissipation effect of the battery device.

[0019] In some embodiments of the present application, the first heat exchanger includes a water exchange tank; and / or, the second heat exchanger includes a condenser.

[0020] By including a heat exchanger tank in the first heat exchanger, the heat exchanger tank can dissipate heat from the heat exchange medium in the heat exchange channel in a centralized manner in the air supply channel, thereby improving the heat dissipation effect of the first heat exchanger. By including a condenser in the second heat exchanger, the condenser can adjust the temperature of the refrigerant through the phase change process of the refrigerant, and dissipate heat from the refrigerant in the refrigerant medium channel in a centralized manner in the air supply channel, thereby improving the heat dissipation effect of the second heat exchanger.

[0021] In a second aspect, the present application proposes an energy storage device having any of the above-mentioned thermal management devices, the energy storage device also comprising a box and a battery device disposed in the box, and the thermal management device is configured to cooperate with the battery device in heat exchange.

[0022] By setting up a thermal management device, the thermal management device can cooperate with the battery device in heat exchange through a heat exchange system, or the thermal management device can cooperate with the battery device in heat exchange through a heat exchange system and a refrigerant system, thereby improving the heat dissipation effect of the battery device and improving the working performance of the energy storage equipment.

[0023] In some embodiments of the present application, an air inlet and an air outlet are formed in the box body, and an air supply channel connecting the air inlet and the air outlet is formed inside the box body.

[0024] By setting up an air supply channel inside the box, the first heat exchanger and the second heat exchanger can be respectively arranged in the air supply channel inside the box, so that the first heat exchanger and the second heat exchanger can dissipate heat through the airflow in the air supply channel, thereby improving the heat dissipation effect of the heat exchange system and / or the refrigerant system on the battery device.

[0025] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Moreover, the same reference numerals are used throughout the accompanying drawings to represent the same components. In the accompanying drawings: Figure 1 It is a schematic diagram of the overall structure of an energy storage device provided in one embodiment of the present application; Figure 2It is a partial structural schematic diagram of a thermal management device provided in one embodiment of the present application; Figure 3 yes Figure 2 A schematic diagram of the relative position structure of the first heat exchanger and the second heat exchanger; Figure 4 yes Figure 3 An orthographic projection of the first heat exchanger and the second heat exchanger along a first direction; Figure 5 yes Figure 3 A schematic structural diagram of the first heat exchanger in FIG. Figure 6 yes Figure 3 A schematic diagram of the structure of the second heat exchanger in FIG. Figure 7 It is an orthographic projection diagram of the first heat exchanger and the second heat exchanger along the first direction in another embodiment of the present application.

[0027] The reference numerals in the specific implementation manner are as follows: 1000. Energy storage equipment; 100. Thermal management device; 10. heat exchange system; 11. heat exchange channel; 12. first heat exchanger; 121. first part; 122. first fin; 123. first collector; 124. first liquid inlet end; 125. first liquid outlet end; 13. heat exchange plate; 14. water pump; 15. reversing valve; 20. Refrigerant system; 21. Refrigerant medium channel; 22. Second heat exchanger; 221. Third part; 222. Second fin; 223. Second collector; 224. Second liquid inlet end; 225. Second liquid outlet end; 23. Compressor; 24. Third heat exchanger; 25. Throttling element; 30. Air cooling system; 31. Air supply channel; 32. Fan; 200, box body; 300. Battery device; S1, first area; S2, second area. DETAILED DESCRIPTION

[0028] The following detailed description of the implementation of the technical solution of the present application is provided in conjunction with the accompanying drawings. The following implementation is only used to more clearly illustrate the technical solution of the present application, and is therefore only used as an example, and cannot be used to limit the scope of protection of the present application.

[0029] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in the embodiments of the present application should have the common meanings understood by technicians in the field to which the embodiments of the present application belong.

[0030] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present application.

[0031] In addition, the technical terms "first", "second", etc. are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. In the description of the embodiments of the present application, the meaning of "plurality" includes two or more, unless otherwise clearly and specifically defined.

[0032] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0033] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0034] As one of the cleanest and most environmentally friendly energy storage methods, battery energy storage equipment has been increasingly widely used. In energy storage equipment, thermal management devices directly affect the overall temperature control, service life and safety performance of the energy storage equipment. At present, energy storage equipment mainly uses air supply to dissipate heat. When there are multiple heat exchangers with different sizes, multiple heat exchangers are arranged in the air supply channel in sequence along the air supply direction, resulting in unsatisfactory heat dissipation effect of the heat exchanger, which in turn causes the heat dissipation effect of the battery to deteriorate, affecting the working performance of the battery.

[0035] In order to solve the problem of poor heat dissipation effect of the heat exchanger, the present application proposes a thermal management device and an energy storage device having the thermal management device, which can effectively reduce the air flow resistance flowing through two heat exchangers in sequence, increase the air flow rate, thereby improving the heat dissipation consistency at various positions of the heat exchanger, and further improve the heat dissipation effect of the heat exchanger. For the convenience of description, the present application only takes the application of the thermal management device to the energy storage device and the temperature regulation of the battery device in the energy storage device as an example for explanation.

[0036] Thermal management devices are systems or devices used to regulate and control temperature. Thermal management devices are based on the basic principle of heat transfer, that is, heat is transferred from a high-temperature object to a low-temperature object. Through different technologies and components, heat is absorbed, transferred, stored and released, thereby maintaining the system temperature within an appropriate range. Common heat transfer methods include heat conduction, heat convection and heat radiation.

[0037] In some embodiments, the energy storage device includes one or more battery clusters to increase the voltage and capacity of the energy storage device. The battery cluster may include multiple battery devices, and the multiple battery devices are connected in series through a busbar to increase the voltage of the energy storage device. When the energy storage device includes multiple battery clusters, the multiple battery clusters are connected in parallel to increase the capacity of the energy storage device.

[0038] Energy storage devices can be used in energy storage power stations, wind power generation systems, solar power generation systems, mobile power systems or temporary power supply systems. Energy storage devices can store electrical energy as needed and output electrical energy at the appropriate time. For example, energy storage devices can store electrical energy when electricity consumption is low, and provide electrical energy to relevant users or electrical equipment during peak electricity consumption. The energy storage device provided in the embodiments of the present application can be any power system that requires the use of energy storage devices.

[0039] It is understandable that the operating environment temperature in the energy storage device has a great impact on the output power and safety of the energy storage device. With the development of energy storage technology, the capacity of energy storage equipment has been continuously improved, and the operating conditions of energy storage equipment are complex, which can easily cause problems such as excessive temperature of internal components and uneven temperature distribution. These problems may cause the charging and discharging performance, capacity and life of some batteries to decline, thereby affecting the performance of the entire energy storage device. In severe cases, thermal runaway may occur, causing safety accidents. During the operation of the energy storage device, heat will continue to be generated. If the heat cannot be dissipated in time, it will accumulate in the energy storage device to form a high temperature, causing the energy storage device to fail to work normally; when the ambient temperature is too low, it may cause the energy storage device to be difficult to start, or affect the working efficiency of the energy storage device, for example, it may cause the charging and discharging power of the energy storage device to decrease. Long-term low temperature environment may also cause irreversible permanent damage to the components of the energy storage device. The thermal management device can control and adjust the operating environment temperature in the energy storage device to ensure that the components of the energy storage device operate within a suitable temperature range. It can adjust the operating environment temperature in the energy storage device by cooling or heating, thereby improving the working stability and reliability of the energy storage device. For the convenience of description, in the embodiments of the present application, only the heat dissipation of the battery device in the energy storage device by the thermal management device is taken as an example for explanation.

[0040] Combination Figures 1 to 4 As shown, in the first aspect, the present application provides a thermal management device 100. In some embodiments of the present application, the thermal management device 100 includes a heat exchange system 10, a refrigerant system 20 and an air cooling system 30, the heat exchange system 10 includes a heat exchange channel 11 for heat exchange medium circulation, the heat exchange system 10 also includes a first heat exchanger 12 connected to the heat exchange channel 11, the refrigerant system 20 includes a refrigerant medium channel 21 for refrigerant circulation, the refrigerant medium channel 21 is configured to cooperate with the heat exchange channel 11 in heat exchange through a refrigerant phase change, the refrigerant system 20 also includes a second heat exchanger 22 connected to the refrigerant medium channel 21, and the air cooling system 30 is formed with an air supply channel 31 for gas circulation. The first heat exchanger 12 and the second heat exchanger 22 are respectively arranged in the air supply channel 31, the first heat exchanger 12 includes a first part 121, the second heat exchanger 22 includes a second part (not shown in the figure), the orthographic projection of the first part 121 along the first direction X and the orthographic projection of the second part along the first direction X overlap with each other and form a first area S1, at least one of the first heat exchanger 12 and the second heat exchanger 22 also includes a third part 221, the orthographic projection of the third part 221 along the first direction X has a second area S2 arranged outside the first area S1, and the ventilation volume per unit area of ​​at least one of the first part 121 and the second part is greater than the ventilation volume per unit area of ​​the third part 221; the first direction X is the airflow direction in the air supply channel 31, or the first direction X is arranged at an angle to the airflow direction in the air supply channel 31.

[0041] Specifically, the heat exchange system 10 includes a heat exchange channel 11 for the circulation of a heat exchange medium. The heat exchange medium can exchange heat with the heat exchange channel 11 during the flow in the heat exchange channel 11, thereby adjusting the temperature of the heat exchange channel 11. The heat exchange channel 11 also exchanges heat with the battery device 300, thereby taking away the heat emitted by the battery device 300, thereby achieving the purpose of dissipating heat from the battery device 300. Optionally, the heat exchange system 10 also includes a heat exchange plate 13, which is connected to the heat exchange channel 11 and can exchange heat with the battery cells in the battery device 300, thereby taking away the heat emitted by the battery cells, thereby achieving the purpose of dissipating heat from the battery device 300. Optionally, the heat exchange medium includes but is not limited to water, fluorinated liquid, ethanol or silicone oil.

[0042] The heat exchange channel 11 also includes a first heat exchanger 12. After the heat exchange medium in the heat exchange channel 11 dissipates heat from the battery device 300 through the heat exchange plate 13, the heated heat exchange medium flows into the first heat exchanger 12 and dissipates heat through the first heat exchanger 12, thereby achieving the purpose of dissipating heat from the heat exchange medium. The heat exchange medium after dissipating heat through the first heat exchanger 12 can circulate in the heat exchange channel 11, thereby circulating and dissipating heat from the battery device 300.

[0043] The refrigerant system 20 includes a refrigerant medium channel 21 for the circulation of the refrigerant. The refrigerant can undergo a refrigerant phase change during the flow of the refrigerant in the refrigerant medium channel 21, and exchange heat with the heat exchange channel 11 during the phase change, thereby adjusting the temperature of the heat exchange channel 11. The heat exchange channel 11 can also exchange heat with the battery device 300, thereby taking away the heat emitted by the battery device 300, thereby achieving the purpose of heat dissipation of the battery device 300. Optionally, the refrigerant includes but is not limited to difluorochloromethane and tetrafluoroethane.

[0044] The refrigerant system 20 also includes a second heat exchanger 22. After the refrigerant system 20 exchanges heat with the heat exchange channel 11, the temperature of the refrigerant in the refrigerant medium channel 21 increases, and the heated refrigerant flows into the second heat exchanger 22 and dissipates heat through the second heat exchanger 22, thereby achieving the purpose of dissipating the refrigerant heat.

[0045] Among them, the heat dissipation efficiency of the phase change of the refrigerant is greater than the heat dissipation efficiency of the heat exchange medium, and the thermal management device 100 can reasonably select the heat dissipation method of the thermal management device 100 according to the heat dissipation demand of the battery device 300. Optionally, when the heat dissipation demand of the battery device 300 is small, the heat exchange system 10 can be used to exchange heat with the battery device 300 alone, and when the heat dissipation demand of the battery device 300 is large, the refrigerant system 20 can be used to cooperate with the heat exchange system 10 to exchange heat with the battery device 300. Optionally, the thermal management device 100 also includes a controller, which can be electrically connected to the heat exchange system 10 and the refrigerant system 20 respectively, and is used to control the opening and closing of the heat exchange system 10, and is used to control the opening and closing of the refrigerant system 20, thereby controlling the heat dissipation method of the thermal management device 100.

[0046] The air cooling system 30 is formed with an air supply channel 31 for gas circulation, and an air supply airflow is formed in the air supply channel 31. The first heat exchanger 12 and the second heat exchanger 22 are respectively arranged in the air supply channel 31, and cool and dissipate heat under the action of the air supply airflow. Among them, the first heat exchanger 12 includes a first part 121, and the second heat exchanger 22 includes a second part. The orthographic projection of the first part 121 along the first direction X and the orthographic projection of the second part along the first direction X overlap with each other and form a first area S1. Among them, the second part is blocked by the first heat exchanger 12 and cannot be shown. Optionally, the actual area of ​​the first part 121 and the actual area of ​​the second part may be equal or unequal, but the areas of the orthographic projections of the two along the first direction X are equal and overlap. That is, the air supply airflow flowing to the first part 121 or the second part along the first direction X needs to flow through the first part 121 and the second part in sequence, or, flow through the second part and the first part 121 in sequence. At least one of the first heat exchanger 12 and the second heat exchanger 22 further includes a third portion 221, and the orthographic projection of the third portion 221 along the first direction X has a second area S2 disposed outside the first area S1, that is, the air supply airflow flowing toward the third portion 221 along the first direction X only needs to flow through the third portion 221. Compared with the airflow that needs to flow through the first portion 121 and the second portion in sequence, or the airflow that flows through the second portion and the first portion 121 in sequence, the airflow flowing toward the third portion 221 is subject to less wind resistance, thereby having a greater wind speed and a better heat exchange effect. If the ventilation volume per unit area of ​​the third part 221 is consistent with that of the first part 121 or the second part, the wind resistance of the airflow flowing through the third part 221 will be small, so that the heat dissipation speed of the third part 221 is fast, resulting in inconsistent heat dissipation efficiency of the third part 221 and the first part 121 or the second part, reducing the heat dissipation consistency at various positions of the first heat exchanger 12 and / or the second heat exchanger 22 having the third part 221, and further reducing the heat dissipation effect of the first heat exchanger 12 and / or the second heat exchanger 22. In order to improve the heat dissipation consistency at various positions of the first heat exchanger 12 and / or the second heat exchanger 22, the ventilation volume per unit area of ​​at least one of the first part 121 and the second part is set to be greater than the ventilation volume per unit area of ​​the third part 221, thereby adaptively reducing the wind resistance of at least one of the first part 121 and the second part, so that the heat dissipation efficiency of the first part 121, the second part and the third part 221 tend to be consistent. The first direction X is the airflow direction in the air supply channel 31, or the first direction X and the airflow direction in the air supply channel 31 are arranged at an angle greater than 0° and less than 90°. For the convenience of description, the embodiments in this application are described by taking the first direction X as the airflow direction in the air supply channel 31 as an example. Figure 1 The direction indicated by the straight arrow is the direction of the air flow in the air supply channel 31. The first direction X is the direction in which the air flow in the air supply channel 31 flows through the first portion 121 and the second portion in sequence.

[0047] The thermal management device 100 according to the present application can be used to dissipate heat from the battery device 300. When the heat dissipation demand of the battery device 300 is relatively small, the heat exchange system 10 can be used alone to cooperate with the battery device 300 for heat exchange. When the heat dissipation demand of the battery device 300 is relatively large, the refrigerant system 20 can be used in cooperation with the heat exchange system 10 to jointly exchange heat with the battery device 300. Among them, the first heat exchanger 12 and the second heat exchanger 22 are respectively arranged in the air supply channel 31, and heat is dissipated by the air cooling system 30. Since the positive projections of the first part 121 and the second part along the first direction X overlap with each other, the air flow resistance flowing through the first part 121 and the second part along the first direction X increases, the air flow rate slows down, and the heat dissipation efficiency of the first part 121 and the second part decreases. Therefore, the ventilation volume per unit area of ​​at least one of the first part 121 and the second part is set to be greater than the ventilation volume per unit area of ​​the third part 221, thereby reducing the air flow resistance flowing through the first part 121 and the second part, increasing the air flow rate, and making the heat dissipation efficiencies of the first part 121, the second part and the third part 221 tend to be consistent, thereby improving the heat dissipation consistency at each position of the first heat exchanger 12 and the second heat exchanger 22, and further improving the heat dissipation effect of the first heat exchanger 12 and the second heat exchanger 22.

[0048] Combination Figures 1 to 6 As shown, in some embodiments of the present application, the first heat exchanger 12 includes a plurality of first fins 122 spaced apart along a second direction Y, and a first flow area for gas flow is formed between any two adjacent first fins 122. The second heat exchanger 22 includes a plurality of second fins 222 spaced apart along a second direction Y, and a second flow area for gas flow is formed between any two adjacent second fins 222, wherein the second direction Y intersects with the first direction X.

[0049] Specifically, the first heat exchanger 12 is arranged in the air supply channel 31, and a first circulation area for gas circulation is formed between any two adjacent first fins 122. When it is necessary to cool the heat exchange medium in the heat exchange channel 11, the heat exchange medium flows through the first heat exchanger 12 and exchanges heat with the first fins 122. The airflow in the air supply channel 31 passes through the first circulation area, thereby taking away the temperature of the first fins 122 on both sides of the first circulation area, and then reaching the temperature for cooling the heat exchange medium. The second heat exchanger 22 is arranged in the air supply channel 31, and a second circulation area for gas circulation is formed between any two adjacent second fins 222. When it is necessary to cool the refrigerant in the refrigerant medium channel, the refrigerant flows through the second heat exchanger 22 and exchanges heat with the second fins 222. The airflow in the air supply channel 31 passes through the second circulation area, thereby taking away the temperature of the second fins 222 on both sides of the second circulation area, and then reaching the temperature for cooling the refrigerant. Optionally, the first heat exchanger 12 can be a microchannel heat exchanger, and a microchannel is formed in the first fin 122. Optionally, the second heat exchanger 22 can be a microchannel heat exchanger, and a microchannel is formed in the second fin 222. The liquid can effectively dissipate heat during the circulation in the microchannel, thereby improving the heat dissipation effect on the liquid. At the same time, the microchannel heat exchanger has a small volume and a large heat transfer coefficient, which can reduce the occupied space and improve the heat transfer efficiency.

[0050] By providing a plurality of first fins 122 and forming a first flow area for gas flow between two adjacent first fins 122, the airflow can contact the first fins 122 to dissipate heat when passing through the first flow area, thereby improving the heat dissipation efficiency of the first heat exchanger 12. By providing a plurality of second fins 222 and forming a second flow area for gas flow between two adjacent second fins 222, the airflow can contact the second fins 222 to dissipate heat when passing through the second flow area, thereby improving the heat dissipation efficiency of the second heat exchanger 22.

[0051] Combination Figures 1 to 6 As shown, in some embodiments of the present application, the orthographic projection of the first heat exchanger 12 along the first direction X is completely within the range of the orthographic projection of the second heat exchanger 22 along the first direction X, and the second heat exchanger 22 has a third portion 221 .

[0052] Specifically, the first heat exchanger 12 is arranged opposite to the second heat exchanger 22 along the first direction X, and the area of ​​the first heat exchanger 12 is smaller than the area of ​​the second heat exchanger 22, and the orthographic projection of the first heat exchanger 12 along the first direction X is completely within the range of the orthographic projection of the second heat exchanger 22 along the first direction X. That is, the entire first heat exchanger 12 is the first part, the second heat exchanger 22 includes the second part and the third part 221, and the entire orthographic projection of the first heat exchanger 12 along the first direction X completely overlaps with the orthographic projection of the second part along the first direction X. Figure 6As shown, the area enclosed by the outer rectangular box is the orthographic projection of the second heat exchanger 22 along the first direction X, and the area enclosed by the inner rectangular box is the orthographic projection of the first heat exchanger 12 along the first direction X, wherein the overlapping portion of the inner rectangular box and the outer rectangular box is the first area S1, and the area of ​​the outer rectangular box that is not blocked by the inner rectangular box is the second area S2.

[0053] By forming the third portion 221 on the second heat exchanger 22 , the heat dissipation efficiency of the first heat exchanger 12 and the second heat exchanger 22 can be improved by only adjusting the spacing size of some second fins 222 on the second heat exchanger 22 along the second direction.

[0054] Combination Figures 1 to 6 As shown, in some embodiments of the present application, the size of the second circulation area in the second part along the second direction Y is larger than the size of the second circulation area in the third part 221 along the second direction Y; and / or, the size of the first circulation area along the second direction Y is larger than the size of the second circulation area in the third part 221 along the second direction Y.

[0055] Specifically, the size of the second circulation area in the second part along the second direction Y is greater than the size of the second circulation area in the third part 221 along the second direction Y, that is, the spacing between any two adjacent second fins 222 in the second part is greater than the spacing between any two adjacent second fins 222 in the third part 221, so that the ventilation volume per unit area of ​​the second part can be increased relative to the third part 221. Optionally, when the size of the second fin 222 along the second direction Y remains unchanged, the spacing between two adjacent second fins 222 in the second part along the second direction Y can be increased by increasing the size of the second part along the second direction Y. Alternatively, when the size of the second part along the second direction Y is equal to the size of the third part 221 along the second direction Y, the spacing between two adjacent second fins 222 in the second part along the second direction Y can be increased by reducing the size of the second fin 222 in the second part along the second direction Y. Alternatively, the spacing between two adjacent second fins 222 in the second part along the second direction Y may be increased by increasing the size of the second part along the second direction and reducing the size of the second fins 222 in the second part along the second direction Y at the same time.

[0056] Optionally, the size of the first circulation area along the second direction Y is greater than the size of the second circulation area in the third part 221 along the second direction Y, that is, the spacing between any two adjacent first fins 122 in the first part 121 is greater than the spacing between any two adjacent second fins 222 in the third part 221, so that the ventilation volume per unit area of ​​the first part 121 can be increased relative to the third part 221. Optionally, the spacing between any two adjacent first fins 122 in the first part 121 can be equal to the spacing between any two adjacent second fins 222 in the second part, and they are arranged opposite to each other along the first direction X.

[0057] By setting the size of the second circulation area in the second part along the second direction Y to be larger than the size of the second circulation area in the third part 221 along the second direction Y, the ventilation volume per unit area of ​​the second circulation area can be increased, thereby reducing the air flow resistance flowing through the second part, increasing the air flow velocity, and further improving the heat dissipation effect of the first heat exchanger 12 and the second heat exchanger 22. By setting the size of the first circulation area along the second direction Y to be larger than the size of the second circulation area in the third part 221 along the second direction Y, the ventilation volume per unit area of ​​the first circulation area can be increased, thereby reducing the air flow resistance flowing through the second part, increasing the air flow velocity, and further improving the heat dissipation effect of the first heat exchanger 12 and the second heat exchanger 22.

[0058] Combination Figure 3 and Figure 7 As shown, in some embodiments of the present application, the orthographic projection of part of the first heat exchanger 12 along the first direction X and the orthographic projection of part of the second heat exchanger 22 along the first direction X have an overlapping area, and the first heat exchanger 12 and the second heat exchanger 22 respectively have a third part 221.

[0059] Specifically, the orthographic projection of the first heat exchanger 12 along the first direction X and the orthographic projection of the second heat exchanger 22 along the first direction X only partially overlap, and form a first area S1. Figure 7 As shown, the area enclosed by the larger rectangular frame is the orthographic projection of the second heat exchanger 22 along the first direction X, and the area enclosed by the smaller rectangular frame is the orthographic projection of the first heat exchanger 12 along the first direction X, wherein the overlapping portion of the two rectangular frames is the first area S1, and the unblocked area of ​​the two rectangular frames is the second area S2. The first heat exchanger 12 and the second heat exchanger 22 each have a third portion 221, and the projection of the third portion 221 along the first direction X forms the second area S2.

[0060] By respectively providing the third portion 221 on the first heat exchanger 12 and the second heat exchanger 22 , it is convenient to adjust the relative positions of the first heat exchanger 12 and the second heat exchanger 22 .

[0061] Combination Figures 1 to 3 As shown, in some embodiments of the present application, a flow-blocking structure (not shown in the figure) is also provided in the air supply channel 31, and the orthographic projection of the flow-blocking structure along the first direction X has an overlapping area with the second area S2, and the flow-blocking structure is arranged on the windward side of the first heat exchanger 12 or the second heat exchanger 22.

[0062] Specifically, the flow-blocking structure may be a flow-blocking plate, and a vent is provided through the flow-blocking plate, so that the airflow in the air supply channel 31 can be resisted by the flow-blocking plate in the process of flowing toward the first heat exchanger 12 or the second heat exchanger 22, and can flow toward the first heat exchanger 12 or the second heat exchanger 22 through the vent. Optionally, when the orthographic projection of the first heat exchanger 12 along the first direction X is completely within the range of the orthographic projection of the second heat exchanger 22 along the first direction X, the flow-blocking structure may be provided on the windward side of the third portion 221 of the second heat exchanger 22. Optionally, the flow-blocking structure may be a plurality of flow-blocking strips, and the plurality of flow-blocking strips are arranged at intervals from each other to form a channel for airflow.

[0063] By arranging a flow-blocking structure on the windward side of the first heat exchanger 12 and the second heat exchanger 22, the flow-blocking structure can block the airflow flowing to the third part 221, thereby reducing the flow rate of the airflow flowing through the third part 221, and making the heat dissipation efficiency of the first part 121, the second part and the third part 221 tend to be consistent, thereby improving the heat dissipation consistency at various positions of the first heat exchanger 12 and the second heat exchanger 22, and further improving the heat dissipation effect of the first heat exchanger 12 and the second heat exchanger 22.

[0064] Combination Figures 1 to 3 As shown, in some embodiments of the present application, the first heat exchanger 12 is disposed on the windward side of the second heat exchanger 22 .

[0065] Specifically, the first heat exchanger 12 is arranged on the windward side of the second heat exchanger 22, that is, the airflow in the air supply channel 31 first flows through the first heat exchanger 12, and then flows through the second heat exchanger 22. Optionally, when the orthographic projection of the first heat exchanger 12 along the first direction X is completely within the range of the orthographic projection of the second heat exchanger 22 along the first direction X, the first heat exchanger 12 can be placed on the windward side of the second heat exchanger 22. Among them, since the airflow flowing through the first heat exchanger 12 is not blocked by the second heat exchanger 22, the ventilation volume per unit area at each position in the first heat exchanger 12 can be set to be consistent, that is, the spacing between any two adjacent first fins 122 along the second direction Y is equal, thereby improving the heat dissipation consistency at each position of the first heat exchanger 12. Since the second part of the second heat exchanger 22 is blocked by the first heat exchanger 12, and the third part 221 is not blocked by the first heat exchanger 12, the ventilation volume per unit area at each position of the second part can be increased compared with the third part 221, that is, the spacing size between any two adjacent second fins 222 in the second part is set larger than the spacing size between any two adjacent second fins 222 in the third part 221, thereby improving the heat dissipation consistency at each position of the second heat exchanger 22.

[0066] By arranging the first heat exchanger 12 on the windward side of the second heat exchanger 22 , the airflow in the air supply channel 31 first acts on the first heat exchanger 12 , thereby improving the heat dissipation effect of the first heat exchanger 12 .

[0067] Combination Figures 1 to 6 As shown, in some embodiments of the present application, the refrigerant system 20 also includes a third heat exchanger 24 and a compressor 23. The compressor 23, the second heat exchanger 22 and the third heat exchanger 24 are respectively arranged in the refrigerant medium channel 21, and the third heat exchanger 24 is configured to cooperate with the heat exchange channel 11 for heat exchange.

[0068] Specifically, the compressor 23, the second heat exchanger 22 and the third heat exchanger 24 are connected in sequence through the refrigerant medium channel. When the heat exchange medium needs to be cooled, the refrigerant flows through the third heat exchanger 24 and exchanges heat with the heat exchange channel 11, and takes away the heat of the heat exchange medium in the heat exchange channel 11. After the heated refrigerant is compressed by the compressor 23, it flows into the second heat exchanger 22 and is cooled and dissipated by the air flow in the air supply channel 31. By setting up the refrigerant system 20, the heat dissipation efficiency of the heat exchange medium can be improved. For example, when the ambient temperature is high, the heat exchange system 10 and the refrigerant system 20 can cooperate to quickly cool the heat exchange medium, thereby improving the working efficiency of the thermal management device 100, so as to improve the operating stability of the energy storage device 1000. Optionally, a throttling element 25 is also provided in the refrigerant medium channel 21, and the throttling element 25 is used to adjust the flow rate and coldness of the refrigerant in the refrigerant medium channel 21 to improve the working stability of the refrigerant system 20. Optionally, the throttling element 25 may be a capillary tube, a throttling valve, an expansion valve, etc. Optionally, the third heat exchanger 24 may be a fluorine-water plate heat exchanger.

[0069] By coordinating the heat exchange between the third heat exchanger 24 and the heat exchange channel 11 , the refrigerant system 20 can adjust the temperature of the heat exchange medium in the heat exchange channel 11 through the third heat exchanger 24 , thereby dissipating heat from the battery device 300 through the heat exchange channel 11 , thereby improving the heat dissipation effect of the battery device 300 .

[0070] Combination Figures 1 to 6 As shown, in some embodiments of the present application, the first heat exchanger 12 includes a water exchange tank; and / or, the second heat exchanger 22 includes a condenser.

[0071] Specifically, the first heat exchanger 12 includes a heat exchange water tank, which is arranged in the air supply channel 31 and is connected to the heat exchange channel 11. Optionally, the heat exchange system also includes a heat exchange plate 13, a water pump 14 and a reversing valve 15, wherein the water pump 14, the heat exchange plate 13, the reversing valve 15 and the first heat exchanger 12 are connected end to end in sequence, and the water pump 14 is used to pump the heat exchange medium in the first heat exchanger 12 into the heat exchange plate 13, and to exchange heat with the battery cells in the battery device 300 through the heat exchange plate 13. The reversing valve 15 can be used to connect the heat exchange plate 13 and the first heat exchanger 12, and can selectively directly connect the heat exchange plate 13 and the water pump 14 as needed, and in the process of the heat exchange medium flowing from the heat exchange plate 13 to the water pump 14, it flows through the third heat exchanger 24, so that the heat exchange medium is quickly cooled and dissipated through the refrigerant system 20.

[0072] The second heat exchanger 22 includes a condenser. When the heat exchange medium needs to be cooled, the second heat exchanger 22 can be configured as a condenser, and the third heat exchanger 24 can be configured as an evaporator. Specifically, when the heat exchange medium needs to be cooled, the heat exchange medium in the heat exchange channel 11 passes through the third heat exchanger 24, and the third heat exchanger 24 evaporates and absorbs heat, taking away the heat of the heat exchange medium. After the refrigerant in the refrigerant system 20 is compressed by the compressor 23, it flows into the second heat exchanger 22 and is cooled and cooled by the airflow in the air supply channel 31.

[0073] By including a heat exchange water tank in the first heat exchanger 12, the heat exchange water tank can dissipate heat from the heat exchange medium in the heat exchange channel 11 in a centralized manner in the air supply channel 31, thereby improving the heat dissipation effect of the first heat exchanger 12. By including a condenser in the second heat exchanger 22, the condenser can adjust the temperature of the refrigerant through the phase change process of the refrigerant, and dissipate heat from the refrigerant in the refrigerant medium channel 21 in a centralized manner in the air supply channel 31, thereby improving the heat dissipation effect of the second heat exchanger 22.

[0074] Combination Figures 2 to 5 As shown, in some embodiments of the present application, the first heat exchanger 12 further includes a first current collector 123, and a plurality of first fins 122 in the first heat exchanger 12 are arranged at intervals along the second direction Y, and the first current collectors 123 are respectively provided at both ends of the length direction of the first fins 122, and the two ends of the length direction of the plurality of first fins 122 are respectively connected to the first current collectors 123. A first liquid inlet 124 is provided on one side of the first current collector 123, and a first liquid outlet 125 is provided on the other side of the first current collector 123. The heat exchange medium flows into the interior of the plurality of first fins 122 through the first liquid inlet 124, and flows out to the exterior of the plurality of first fins 122 through the first liquid outlet 125. The flow process of the heat exchange medium in the first fin 122 can be cooled and dissipated by the airflow in the air supply channel 31.

[0075] Combination Figures 2 to 6 As shown, in some embodiments of the present application, the second heat exchanger 22 further includes a second current collector 223, and a plurality of second fins 222 in the second heat exchanger 22 are arranged at intervals along the second direction Y, and the second current collectors 223 are respectively provided at both ends of the length direction of the second fins 222, and the two ends of the length direction of the plurality of second fins 222 are respectively connected to the second current collectors 223. A second liquid inlet 224 and a second liquid outlet 225 are provided on the second current collector 223 on one side, and the refrigerant flows into the interior of the plurality of second fins 222 through the second liquid inlet 224, and flows out to the exterior of the plurality of second fins 222 through the second liquid outlet 225. The flow process of the refrigerant in the second fins 222 can be cooled and dissipated by the airflow in the air supply channel 31.

[0076] In the second aspect, the present application proposes an energy storage device 1000, which has a thermal management device 100 of any of the above-mentioned embodiments. The energy storage device 1000 also includes a box body 200 and a battery device 300 disposed in the box body 200. The thermal management device 100 is configured to cooperate with the battery device 300 in heat exchange through a heat exchange system 10 and / or a refrigerant system 20.

[0077] Specifically, the energy storage device 1000 may be an energy storage box or an energy storage cabinet. The box body 200 forms the overall appearance structure of the energy storage device 1000, and a receiving cavity for receiving the battery device 300 and at least part of the thermal management device 100 is formed therein. There may be multiple battery devices 300, and the multiple battery devices 300 are arranged in sequence in the vertical direction to form a battery cluster.

[0078] By providing the thermal management device 100 , the thermal management device 100 can cooperate with the battery device 300 in heat exchange through the heat exchange system 10 and / or the refrigerant system 20 , thereby improving the heat dissipation effect of the battery device 300 and improving the working performance of the energy storage device 1000 .

[0079] Combination Figures 1 to 3 As shown, in some embodiments of the present application, the box body 200 is formed with an air inlet and an air outlet, and an air supply channel 31 connecting the air inlet and the air outlet is formed inside the box body 200.

[0080] Specifically, an air supply channel 31 is formed inside the box 200, an air outlet is formed on the top wall or side wall of the box 200, and the air outlet is arranged above at least part of the second heat exchanger 22. An air inlet is also formed on the side wall of the box 200, and the air inlet is arranged below at least part of the first heat exchanger 12, so that the airflow outside the box 200 can flow through the first heat exchanger 12 and the second heat exchanger 22 in sequence after entering the air supply channel 31 through the air inlet, and then flow out through the air outlet. Optionally, the air cooling system 30 also includes a fan 32, which is arranged at the air outlet and is used to guide the airflow to flow into the box 200 through the air inlet, and flow out to the outside of the box 200 through the air outlet.

[0081] By setting up an air supply channel 31 inside the box body 200, the first heat exchanger 12 and the second heat exchanger 22 can be respectively set in the air supply channel 31 in the box body 200, so that the first heat exchanger 12 and the second heat exchanger 22 can dissipate heat through the air flow in the air supply channel 31, thereby improving the heat dissipation effect of the heat exchange system 10 and / or the refrigerant system 20 on the battery device 300.

[0082] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below.

[0083] Combination Figures 1 to 6 As shown, the present application proposes an energy storage device 1000, which includes a box 200 and a battery device 300 disposed in the box 200. The energy storage device 1000 also includes a thermal management device 100, which is configured to cooperate with the battery device 300 for heat exchange.

[0084] Optionally, the thermal management device 100 includes a heat exchange system 10, a refrigerant system 20 and an air cooling system 30, wherein the heat exchange system 10 includes a heat exchange channel 11 for heat exchange medium circulation, the heat exchange system 10 also includes a first heat exchanger 12 connected to the heat exchange channel 11, the refrigerant system 20 includes a refrigerant medium channel 21 for refrigerant circulation, the refrigerant medium channel 21 is configured to cooperate with the heat exchange channel 11 in heat exchange through a refrigerant phase change, the refrigerant system 20 also includes a second heat exchanger 22 connected to the refrigerant medium channel 21, and the air cooling system 30 is formed with an air supply channel 31 for gas circulation. Among them, the first heat exchanger 12 and the second heat exchanger 22 are respectively arranged in the air supply channel 31, and the first heat exchanger 12 is arranged on the windward side of the second heat exchanger 22. The first heat exchanger 12 includes a first part 121, and the second heat exchanger 22 includes a second part. The orthographic projection of the first part 121 along the first direction X and the orthographic projection of the second part along the first direction X overlap with each other and form a first area S1. At least one of the first heat exchanger 12 and the second heat exchanger 22 also includes a third part 221. The orthographic projection of the third part 221 along the first direction X has a second area S2 arranged outside the first area S1, and the ventilation volume per unit area of ​​at least one of the first part 121 and the second part is greater than the ventilation volume per unit area of ​​the third part 221. The first direction X is the airflow direction in the air supply channel 31, or the first direction X is arranged at an angle to the airflow direction in the air supply channel 31.

[0085] Optionally, the first heat exchanger 12 includes a plurality of first fins 122 spaced apart along a second direction Y, and a first flow area for gas flow is formed between any two adjacent first fins 122. The second heat exchanger 22 includes a plurality of second fins 222 spaced apart along a second direction Y, and a second flow area for gas flow is formed between any two adjacent second fins 222, wherein the second direction Y intersects with the first direction X.

[0086] Optionally, the orthographic projection of the first heat exchanger 12 along the first direction X is completely within the range of the orthographic projection of the second heat exchanger 22 along the first direction X, and the second heat exchanger 22 has a third portion 221. The size of the second flow area in the second portion along the second direction Y is greater than the size of the second flow area in the third portion 221 along the second direction Y. The size of the first flow area along the second direction Y is greater than the size of the second flow area in the third portion 221 along the second direction Y.

[0087] Optionally, the refrigerant system 20 further includes a third heat exchanger 24 and a compressor 23 . The compressor 23 , the second heat exchanger 22 and the third heat exchanger 24 are respectively disposed in the refrigerant medium channel 21 . The third heat exchanger 24 is configured to cooperate with the heat exchange channel 11 in heat exchange.

[0088] Optionally, the first heat exchanger 12 includes a water exchange tank, the second heat exchanger 22 includes a condenser, and the third heat exchanger 24 includes an evaporator.

[0089] Optionally, the box body 200 is formed with an air inlet and an air outlet, and an air supply channel 31 connecting the air inlet and the air outlet is formed inside the box body 200.

[0090] Optionally, a flow-blocking structure is further provided in the air supply channel 31 , the orthographic projection of the flow-blocking structure along the first direction X has an overlapping area with the second area S2 , and the flow-blocking structure is provided on the windward side of the second heat exchanger 22 .

[0091] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the various embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A thermal management device, characterized in that: include: A heat exchange system, the heat exchange system comprising a heat exchange channel for heat exchange medium to flow through, the heat exchange system further comprising a first heat exchanger connected to the heat exchange channel; A refrigerant system, the refrigerant system comprising a refrigerant medium channel for circulating refrigerant, the refrigerant medium channel being configured to cooperate with the heat exchange channel in heat exchange through a refrigerant phase change, and the refrigerant system further comprising a second heat exchanger in communication with the refrigerant medium channel; An air cooling system, wherein the air cooling system is provided with an air supply channel for gas circulation; The first heat exchanger and the second heat exchanger are respectively arranged in the air supply channel, the first heat exchanger includes a first part, the second heat exchanger includes a second part, the orthographic projection of the first part along a first direction and the orthographic projection of the second part along the first direction overlap with each other and form a first area, at least one of the first heat exchanger and the second heat exchanger further includes a third part, the orthographic projection of the third part along the first direction has a second area outside the first area, and the ventilation volume per unit area of ​​at least one of the first part and the second part is greater than the ventilation volume per unit area of ​​the third part; The first direction is the direction of air flow in the air supply channel, or the first direction is arranged at an angle to the direction of air flow in the air supply channel.

2. The thermal management device according to claim 1, characterized in that: The first heat exchanger includes a plurality of first fins spaced apart along a second direction, and a first flow area for gas flow is formed between any two adjacent first fins. The second heat exchanger includes a plurality of second fins spaced apart along a second direction, and a second flow area for gas flow is formed between any two adjacent second fins, wherein the second direction intersects with the first direction.

3. The thermal management device according to claim 2, characterized in that: The orthographic projection of the first heat exchanger along the first direction is completely within the range of the orthographic projection of the second heat exchanger along the first direction, and the second heat exchanger has the third portion.

4. The thermal management device according to claim 3, characterized in that: The size of the second flow area in the second part along the second direction is larger than the size of the second flow area in the third part along the second direction; and / or the size of the first flow area along the second direction is larger than the size of the second flow area in the third part along the second direction.

5. The thermal management device according to claim 2, characterized in that: An orthographic projection of a portion of the first heat exchanger along the first direction and an orthographic projection of a portion of the second heat exchanger along the first direction have an overlapping area, and the first heat exchanger and the second heat exchanger respectively have the third portion.

6. The thermal management device according to claim 1, characterized in that: A flow-blocking structure is also provided in the air supply channel, the orthographic projection of the flow-blocking structure along the first direction has an overlapping area with the second area, and the flow-blocking structure is provided on the windward side of the first heat exchanger or the second heat exchanger.

7. The thermal management device according to any one of claims 1 to 6, characterized in that: The first heat exchanger is disposed on the windward side of the second heat exchanger.

8. The thermal management device according to any one of claims 1 to 6, characterized in that: The refrigerant system further includes a third heat exchanger and a compressor. The compressor, the second heat exchanger and the third heat exchanger are respectively arranged in the refrigerant medium channel, and the third heat exchanger is configured to cooperate with the heat exchange channel in heat exchange.

9. The thermal management device according to any one of claims 1 to 6, characterized in that: The first heat exchanger includes a water exchange tank; and / or the second heat exchanger includes a condenser.

10. An energy storage device, characterized in that: A thermal management device according to any one of claims 1 to 9, wherein the energy storage device further comprises a box and a battery device arranged in the box, and the thermal management device is configured to cooperate with the battery device in heat exchange.

11. The energy storage device according to claim 10, characterized in that: The box body is formed with an air inlet and an air outlet, and the interior of the box body is formed with the air supply channel communicating with the air inlet and the air outlet.

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