Thermal management device and energy storage device

Abstract

The application relates to a heat management device and an energy storage device. 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 exchange heat with the heat exchange channel. The refrigerant system further comprises a second heat exchanger. The air cooling system forms an air supply channel. The first heat exchanger comprises a first part. The second heat exchanger comprises a second part. The positive projection of the first part along a first direction and the positive projection of the second part along the first direction overlap each other and form a first region. At least one of the first heat exchanger and the second heat exchanger further comprises a third part. The positive projection of the third part along the first direction has a second region outside the first region. The ventilation quantity per unit area of at least one of the first part and the second part is greater 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 devices, in particular to a heat management device and an energy storage device. BACKGROUND

[0002] As one of the most clean and environmentally friendly energy storage methods, battery energy storage devices have been increasingly widely used. In the energy storage device, the heat management device directly affects the overall temperature control, service life and safety performance of the energy storage device. At present, the energy storage device mainly relies on air supply heat dissipation. When the number of heat exchangers is multiple and the sizes are different, multiple heat exchangers are sequentially arranged in the air supply channel along the air supply direction, so that the heat dissipation effect of the heat exchanger is not ideal, and then the heat dissipation effect of the battery is poor, which affects the working performance of the battery. SUMMARY

[0003] In view of the defects of the prior art, the purpose of the present application is to provide a heat management device and an energy storage device, which can effectively solve the problem of poor heat dissipation effect of the heat exchanger:

[0004] In a first aspect, the present application provides a heat management device, which comprises:

[0005] a heat exchange system, the heat exchange system comprising a heat exchange channel for the flow of a heat exchange medium, the heat exchange system further comprising a first heat exchanger in communication with the heat exchange channel;

[0006] a refrigerant system, the refrigerant system comprising a refrigerant medium channel for the flow of a refrigerant, the refrigerant medium channel being configured to exchange heat with the heat exchange channel by means of phase change of the refrigerant, the refrigerant system further comprising a second heat exchanger in communication with the refrigerant medium channel;

[0007] an air cooling system, the air cooling system forming an air supply channel for the flow of a gas;

[0008] wherein the first heat exchanger and the second heat exchanger are respectively arranged in the air supply channel, the first heat exchanger comprises a first part, the second heat exchanger comprises a second part, the first part along the first direction and the second part along the first direction are mutually overlapped and form a first region, at least one of the first heat exchanger and the second heat exchanger further comprises a third part, the third part along the first direction has a second region arranged outside the first region, and the ventilation quantity per unit area of at least one of the first part and the second part is greater than the ventilation quantity per unit area of the third part;

[0009] The first direction is the flow direction of the gas in the air supply channel, or the first direction is arranged at an angle with the flow direction of the gas in the air supply channel.

[0010] The heat management device according to the present application can be used for heat dissipation of the battery device. When the heat dissipation demand of the battery device is small, the heat exchange system can be used for heat exchange with the battery device alone. When the heat dissipation demand of the battery device is large, the refrigerant system and the heat exchange system can be used for heat exchange with the battery device together. The first heat exchanger and the second heat exchanger are arranged in the air supply channel and dissipate heat through the air cooling system. Since the first part and the second part overlap with each other in the first direction, the air flow resistance through the first part and the second part in 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 quantity per unit area of at least one of the first part and the second part is set to be greater than the ventilation quantity per unit area of the third part, so as to reduce the air flow resistance through the first part and the second part, increase the air flow rate, make the heat dissipation efficiency of the first part, the second part and the third part consistent, improve the heat dissipation consistency of the first heat exchanger and the second heat exchanger at different positions, and further improve the heat dissipation effect of the first heat exchanger and the second heat exchanger.

[0011] In some embodiments of the present application, the first heat exchanger includes a plurality of first fins arranged at intervals in the second direction, and a first flow-through area for gas flow is formed between any two adjacent first fins. The second heat exchanger includes a plurality of second fins arranged at intervals in the second direction, and a second flow-through area for gas flow is formed between any two adjacent second fins. The second direction intersects the first direction.

[0012] By arranging a plurality of first fins and forming a first flow-through area for gas flow between any two adjacent first fins, the air flow can contact the first fins for heat dissipation when flowing through the first flow-through area, thereby improving the heat dissipation efficiency of the first heat exchanger. By arranging a plurality of second fins and forming a second flow-through area for gas flow between any two adjacent second fins, the air flow can contact the second fins for heat dissipation when flowing through the second flow-through area, thereby improving the heat dissipation efficiency of the second heat exchanger.

[0013] In some embodiments of the present application, the first heat exchanger is completely within the projection of the second heat exchanger in the first direction, and the second heat exchanger has a third part.

[0014] By forming the third part on the second heat exchanger, the heat dissipation efficiency of the first heat exchanger and the second heat exchanger can be improved by adjusting the interval size of only part of the second fins on the second heat exchanger in the second direction.

[0015] In some embodiments of the present application, the size of the second flow-through area in the second direction in the second part is greater than the size of the second flow-through area in the second direction in the third part; and / or, the size of the first flow-through area in the second direction is greater than the size of the second flow-through area in the second direction in the third part.

[0016] By setting the size of the second flow-through region in the second portion along the second direction to be greater than the size of the second flow-through region in the third portion along the second direction, the ventilation volume per unit area of the second flow-through region can be increased, thereby reducing the airflow resistance of the airflow flowing through the second portion, 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 flow-through region along the second direction to be greater than the size of the second flow-through region in the third portion along the second direction, the ventilation volume per unit area of the first flow-through region can be increased, thereby reducing the airflow resistance of the airflow flowing through the second portion, increasing the airflow velocity, and further improving the heat dissipation effect of the first heat exchanger and the second heat exchanger.

[0017] In some embodiments of the present application, the first heat exchanger and the second heat exchanger each have a third portion.

[0018] By providing the first heat exchanger and the second heat exchanger with the third portion, respectively, the relative positions of the first heat exchanger and the second heat exchanger can be adjusted.

[0019] In some embodiments of the present application, the air supply passage further comprises a flow resistance structure, the flow resistance structure has an overlapping region with the second region along the first direction, and the flow resistance structure is arranged on the windward side of the first heat exchanger or the second heat exchanger.

[0020] By arranging the flow resistance structure on the windward side of the first heat exchanger and the second heat exchanger, the flow resistance structure can block the airflow flowing to the third portion, thereby reducing the airflow velocity flowing through the third portion, making the heat dissipation efficiency of the first portion, the second portion, and the third portion consistent, improving the heat dissipation consistency of the first heat exchanger and the second heat exchanger at each position, and further improving the heat dissipation effect of the first heat exchanger and the second heat exchanger.

[0021] In some embodiments of the present application, the first heat exchanger is arranged on the windward side of the second heat exchanger.

[0022] By arranging the first heat exchanger on the windward side of the second heat exchanger, the airflow in the air supply passage first acts on the first heat exchanger, thereby improving the heat dissipation effect of the first heat exchanger.

[0023] In some embodiments of the present application, the refrigerant system further comprises a third heat exchanger and a compressor, the compressor, the second heat exchanger, and the third heat exchanger are arranged in the refrigerant medium passage, and the third heat exchanger is configured to exchange heat with the heat exchange passage.

[0024] By arranging the third heat exchanger in heat exchange cooperation with the heat exchange passage, the refrigerant system can adjust the temperature of the heat exchange medium in the heat exchange passage through the third heat exchanger, thereby dissipating heat from the battery device through the heat exchange passage and improving the heat dissipation effect of the battery device.

[0025] In some embodiments of the present application, the first heat exchanger comprises a heat exchange water tank; and / or, the second heat exchanger comprises a condenser.

[0026] By comprising the heat exchange water tank in the first heat exchanger, the heat exchange water tank can concentrate heat dissipation on the heat exchange medium in the heat exchange channel in the air supply channel, thereby improving the heat dissipation effect of the first heat exchanger. By comprising the condenser in the second heat exchanger, the condenser can adjust the temperature of the refrigerant through the phase change process of the refrigerant, and concentrate heat dissipation on the refrigerant medium in the air supply channel, thereby improving the heat dissipation effect of the second heat exchanger.

[0027] In a second aspect, the present application provides an energy storage device having any of the above heat management devices, the energy storage device further comprising a cabinet and a battery device arranged in the cabinet, and the heat management device is configured to exchange heat with the battery device.

[0028] By arranging the heat management device, the heat management device can exchange heat with the battery device through the heat exchange system, or the heat management device can exchange heat with the battery device through the heat exchange system and the refrigerant system, thereby improving the heat dissipation effect of the battery device and improving the working performance of the energy storage device.

[0029] In some embodiments of the present application, the cabinet is formed with an air inlet and an air outlet, and the inside of the cabinet is formed with an air supply channel communicating with the air inlet and the air outlet.

[0030] By arranging the air supply channel in the inside of the cabinet, the first heat exchanger and the second heat exchanger can be arranged in the air supply channel in the cabinet, so that the first heat exchanger and the second heat exchanger are cooled by 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.

[0031] The above description is only a summary of the technical solutions of the present application. In order to enable the technical means of the present application to be more clearly understood, and to be implemented according to the content of the description, and in order to enable the above and other purposes, characteristics and advantages of the present application to be more apparent and easy to understand, the following specific embodiments of the present application are described. BRIEF DESCRIPTION OF DRAWINGS

[0032] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The accompanying drawings are included to provide a better understanding of the preferred embodiments, and are not to be considered as limitations on the present application. Moreover, in the entire drawings, the same reference numerals represent the same components. In the drawings:

[0033] Figure 1 is a schematic diagram of the overall structure of an energy storage device provided by an embodiment of the present application;

[0034] Figure 2 is a schematic diagram of a part structure of a heat management device provided by an embodiment of the present application;

[0035] Figure 3 is Figure 2 is a schematic diagram of relative position structures of the first heat exchanger and the second heat exchanger in

[0036] Figure 4 is Figure 3 is an orthographic projection view of the first heat exchanger and the second heat exchanger in

[0037] Figure 5 is Figure 3 is a schematic diagram of the first heat exchanger in

[0038] Figure 6 is a schematic diagram of the second heat exchanger in Figure 3

[0039] Figure 7 is an orthographic projection view of the first heat exchanger and the second heat exchanger in another embodiment of the present application along a first direction.

[0040] The reference signs in the detailed description of the embodiments are as follows:

[0041] 1000, energy storage device;

[0042] 100, heat management device;

[0043] 10, heat exchange system; 11, heat exchange channel; 12, first heat exchanger; 121, first part; 122, first fin; 123, first current collector; 124, first liquid inlet end; 125, first liquid outlet end; 13, heat exchange plate; 14, water pump; 15, reversing valve;

[0044] 20, refrigerant system; 21, refrigerant medium channel; 22, second heat exchanger; 221, third part; 222, second fin; 223, second current collector; 224, second liquid inlet end; 225, second liquid outlet end; 23, compressor; 24, third heat exchanger; 25, throttling element;

[0045] 30, air cooling system; 31, air supply channel; 32, fan;

[0046] 200, box body;

[0047] 300, battery device;

[0048] S1, first area; S2, second area. Detailed description

[0049] ​The technical solutions of the present application will be described in detail below with reference to the drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present application, and therefore only serve as examples, and cannot limit the protection scope of the present application.

[0050] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in the embodiments of the present application should be understood as the general meaning understood by the skilled in the art to which the embodiments of the present application belong.

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

[0052] In addition, the technical terms "first", "second", and the like are only for description purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. In the description of the embodiments of the present application, the meaning of "multiple" is to include two or more, unless otherwise explicitly specified and limited.

[0053] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, the technical terms "mounting", "connecting", "connecting", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0054] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, the first feature "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature "above", "over" and "on" the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "under" and "under" the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0055] Battery energy storage devices, as one of the most clean and environmentally friendly energy storage methods, have been increasingly widely used. In the energy storage device, the thermal management device directly affects the overall temperature control, service life and safety performance of the energy storage device. At present, the energy storage device mainly uses air supply heat dissipation. When the number of heat exchangers is multiple and the sizes are different, multiple heat exchangers are sequentially arranged in the air supply channel along the air supply direction, so that the heat dissipation effect of the heat exchanger is not ideal, and then the heat dissipation effect of the battery is poor, which affects the working performance of the battery.

[0056] To solve the problem of poor heat dissipation effect of the heat exchanger, the present application provides a thermal management device and an energy storage device with the thermal management device, which can effectively reduce the air flow resistance of the air flow sequentially flowing through two heat exchangers, improve the air flow velocity, thereby improving the consistency of heat dissipation at each position of the heat exchanger, and further improving the heat dissipation effect of the heat exchanger. For the convenience of description, the present application only takes the thermal management device applied to the energy storage device and used for temperature regulation of the battery device in the energy storage device as an example for description.

[0057] The thermal management device is a system or device for adjusting and controlling temperature. The thermal management device is based on the basic principle of heat transfer, that is, heat transfer from high-temperature objects to low-temperature objects. Through different technologies and components, heat absorption, transfer, storage and release are realized, so as to maintain the system temperature within a suitable range. Common heat transfer methods include heat conduction, heat convection and heat radiation.

[0058] In some embodiments, the energy storage device includes one or more battery clusters to improve the voltage and capacity of the energy storage device. The battery cluster can include a plurality of battery devices, and the plurality of battery devices are connected in series through a busbar component to improve the voltage of the energy storage device. When the energy storage device includes a plurality of battery clusters, the plurality of battery clusters are connected in parallel to improve the capacity of the energy storage device.

[0059] The energy storage device can be used in energy storage power stations, wind power systems, solar power systems, mobile power systems or temporary power supply systems, etc. The energy storage device can store electrical energy as needed and output electrical energy at the appropriate time. For example, the energy storage device can store electrical energy during the low electricity consumption valley, and provide electrical energy for related users or electrical equipment during the electricity consumption peak. The energy storage device provided by the embodiments of the present application can be any power system that needs to use an energy storage device.

[0060] It can be understood that the operating environment temperature in the energy storage device has a great influence on the output power and safety performance of the energy storage device. With the development of energy storage technology, the capacity of the energy storage device is continuously improved, and the operating conditions of the energy storage device are complex, which is easy to cause problems such as high temperature of internal components and uneven temperature distribution. These problems may cause the charge-discharge performance, capacity and service life of part of the batteries to decrease, thereby affecting the performance of the entire energy storage device, and in severe cases, may cause thermal runaway and cause safety accidents. During the operation of the energy storage device, heat is continuously generated, and if the heat cannot be dissipated in time, high temperature will be formed in the energy storage device, 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 start difficultly, or it may affect the working efficiency of the energy storage device, for example, it may cause the charge-discharge power of the energy storage device to decrease, and a long time in a low temperature environment may 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 in a suitable temperature range, which can be adjusted by cooling or heating to adjust the operating environment temperature in the energy storage device, thereby improving the working stability and reliability of the energy storage device. For the convenience of description, only the heat dissipation of the battery device in the energy storage device by the thermal management device is taken as an example for description in the embodiments of the present application.

[0061] In combination with 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 comprises a heat exchange system 10, a refrigerant system 20 and an air cooling system 30, the heat exchange system 10 comprises a heat exchange channel 11 for the flow of heat exchange medium, the heat exchange system 10 further comprises a first heat exchanger 12 in communication with the heat exchange channel 11, the refrigerant system 20 comprises a refrigerant medium channel 21 for the flow of refrigerant, the refrigerant medium channel 21 is configured to cooperate with the heat exchange channel 11 by means of refrigerant phase change, the refrigerant system 20 further comprises a second heat exchanger 22 in communication with the refrigerant medium channel 21, and the air cooling system 30 forms an air supply channel 31 for the flow of gas. Wherein, 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 comprises a first part 121, the second heat exchanger 22 comprises a second part (not shown in the figure), the first part 121 and the second part along the first direction X overlap each other and form a first area S1, at least one of the first heat exchanger 12 and the second heat exchanger 22 further comprises a third part 221, the third part 221 along the first direction X has a second area S2 which is arranged outside the first area S1, and the air volume per unit area of at least one of the first part 121 and the second part is greater than the air volume per unit area of the third part 221; the first direction X is the flow direction of the air flow in the air supply channel 31, or the first direction X is arranged at an angle with the flow direction of the air flow in the air supply channel 31.

[0062] Specifically, the heat exchange system 10 comprises a heat exchange channel 11 for the heat exchange medium to flow through, and the heat exchange medium can exchange heat with the heat exchange channel 11 during the flow process in the heat exchange channel 11, so as to adjust the temperature of the heat exchange channel 11. The heat exchange channel 11 exchanges heat with the battery device 300 at the same time, so as to take away the heat emitted by the battery device 300, and achieve the purpose of heat dissipation of the battery device 300. Optionally, the heat exchange system 10 further comprises a heat exchange plate 13, which is connected with the heat exchange channel 11 and can exchange heat with the battery monomer in the battery device 300, so as to take away the heat emitted by the battery monomer, and achieve the purpose of heat dissipation of the battery device 300. Optionally, the heat exchange medium comprises and is not limited to water, fluorinated liquid, ethanol or silicon oil and the like.

[0063] The heat exchange channel 11 further comprises a first heat exchanger 12, and the heat exchange medium in the heat exchange channel 11 flows into the first heat exchanger 12 after being heated by the heat exchange plate 13 for heat dissipation of the battery device 300, and is cooled by the first heat exchanger 12, so as to achieve the purpose of heat dissipation of the heat exchange medium. The heat exchange medium cooled by the first heat exchanger 12 can circulate and flow in the heat exchange channel 11, so as to circulate and cool the battery device 300.

[0064] The refrigerant system 20 comprises a refrigerant medium channel 21 for the refrigerant to flow through, and the refrigerant can change phase during the flow process in the refrigerant medium channel 21, and exchange heat with the heat exchange channel 11 during the phase change process, so as to adjust the temperature of the heat exchange channel 11. The heat exchange channel 11 can also exchange heat with the battery device 300, so as to take away the heat emitted by the battery device 300, and achieve the purpose of heat dissipation of the battery device 300. Optionally, the refrigerant comprises and is not limited to difluoromonochloromethane and tetrafluoroethane and the like.

[0065] The refrigerant system 20 further comprises a second heat exchanger 22, and the temperature of the refrigerant in the refrigerant medium channel 21 is increased after the refrigerant system 20 exchanges heat with the heat exchange channel 11. The heated refrigerant flows into the second heat exchanger 22 and is cooled by the second heat exchanger 22, so as to achieve the purpose of heat dissipation of the refrigerant.

[0066] 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 heat management device 100 can reasonably select the heat dissipation mode of the heat management device 100 according to the heat dissipation requirement of the battery device 300. Optionally, when the heat dissipation requirement of the battery device 300 is small, the heat exchange system 10 can be used alone to exchange heat with the battery device 300, and when the heat dissipation requirement of the battery device 300 is large, the refrigerant system 20 can be used in cooperation with the heat exchange system 10 to exchange heat with the battery device 300. Optionally, the heat management device 100 further comprises a controller, which is electrically connected with 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 the opening and closing of the refrigerant system 20, so as to control the heat dissipation mode of the heat management device 100.

[0067] The air cooling system 30 is formed with a supply air passage 31 for air flow, and the supply air passage 31 is formed with a supply air flow. The first heat exchanger 12 and the second heat exchanger 22 are respectively arranged in the supply air passage 31 and cooled by the supply air flow. The first heat exchanger 12 includes a first part 121, and the second heat exchanger 22 includes a second part. The first part 121 and the second part along the first direction X are overlapped and form a first area S1. 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 can be equal or not equal, but the area of the first part 121 and the area of the second part along the first direction X are equal and overlapped. That is, the supply air flow flowing to the first part 121 or the second part 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 part 221, and the third part 221 along the first direction X has a second area S2 arranged outside the first area S1. That is, the supply air flow flowing to the third part 221 only needs to flow through the third part 221. Compared with the supply air flow flowing through the first part 121 and the second part in sequence, or the supply air flow flowing through the second part and the first part 121 in sequence, the air resistance of the supply air flow flowing to the third part 221 is smaller, so that the wind speed is larger and the heat exchange effect is better. 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 air resistance of the air flow flowing through the third part 221 will be smaller, so that the heat dissipation speed of the third part 221 is fast, the heat dissipation efficiency of the third part 221 and the first part 121 or the second part is inconsistent, the heat dissipation consistency of the first heat exchanger 12 and / or the second heat exchanger 22 at each position is reduced, and the heat dissipation effect of the first heat exchanger 12 and / or the second heat exchanger 22 is reduced. In order to improve the heat dissipation consistency of the first heat exchanger 12 and / or the second heat exchanger 22 at each position, 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, so as to adaptively reduce the air resistance of at least one of the first part 121 and the second part, and make the heat dissipation efficiency of the first part 121, the second part and the third part 221 consistent. The first direction X is the flow direction of the air flow in the supply air passage 31, or the first direction X forms an angle greater than 0° and less than 90° with the flow direction of the air flow in the supply air passage 31. For the convenience of description, the embodiments in the present application are only described by taking the first direction X as the flow direction of the air flow in the supply air passage 31. The direction of the straight arrow in the figure is the flow direction of the air flow in the supply air passage 31. The first direction X is the direction of the air flow flowing through the first part 121 and the second part in sequence in the supply air passage 31. Figure 1 The direction of the straight arrow in the figure is the flow direction of the air flow in the supply air passage 31. The first direction X is the direction of the air flow flowing through the first part 121 and the second part in sequence in the supply air passage 31.

[0068] According to the heat management device 100 of the present application, it can be used for heat dissipation of the battery device 300, when the heat dissipation demand of the battery device 300 is small, the heat exchange system 10 can be used for heat exchange with the battery device 300 alone, when the heat dissipation demand of the battery device 300 is large, the refrigerant system 20 and the heat exchange system 10 can be used for heat exchange with the battery device 300 together. Among them, the first heat exchanger 12 and the second heat exchanger 22 are respectively arranged in the air supply channel 31, and are cooled by the air cooling system 30. Since the first part 121 and the second part overlap with each other in the orthogonal projection along the first direction X, the air flow resistance of the air flow flowing through the first part 121 and the second part along the first direction X increases, the air flow velocity slows down, and the heat dissipation efficiency of the first part 121 and the second part decreases. Therefore, the ventilation quantity per unit area of at least one of the first part 121 and the second part is set to be greater than the ventilation quantity per unit area of the third part 221, so as to reduce the air flow resistance of the air flow flowing through the first part 121 and the second part, increase the air flow velocity, and make the heat dissipation efficiency of the first part 121, the second part and the third part 221 consistent, so as to improve the heat dissipation consistency of the first heat exchanger 12 and the second heat exchanger 22 at each position, and further improve the heat dissipation effect of the first heat exchanger 12 and the second heat exchanger 22.

[0069] In combination Figures 1 to 6 As shown in the drawings, in some embodiments of the present application, the first heat exchanger 12 includes a plurality of first fins 122 arranged at intervals along the second direction Y, and a first flow-through 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 arranged at intervals along the second direction Y, and a second flow-through area for gas flow is formed between any two adjacent second fins 222. Among them, the second direction Y intersects the first direction X.

[0070] Specifically, the first heat exchanger 12 is arranged in the air supply channel 31, and a first flow passage for gas flow is formed between any two adjacent first fins 122. When the heat exchange medium in the heat exchange channel 11 needs to be cooled, the heat exchange medium flows through the first heat exchanger 12 and exchanges heat with the first fins 122. The air flow in the air supply channel 31 passes through the first flow passage, thereby taking away the temperature on the first fins 122 arranged on both sides of the first flow passage, and achieving the temperature of the heat exchange medium. The second heat exchanger 22 is arranged in the air supply channel 31, and a second flow passage for gas flow is formed between any two adjacent second fins 222. When the refrigerant in the refrigerant medium channel needs to be cooled, the refrigerant flows through the second heat exchanger 22 and exchanges heat with the second fins 222. The air flow in the air supply channel 31 passes through the second flow passage, thereby taking away the temperature on the second fins 222 arranged on both sides of the second flow passage, and achieving the temperature of the refrigerant. Optionally, the first heat exchanger 12 can be a micro-channel heat exchanger, and the first fins 122 have micro-channels formed therein. Optionally, the second heat exchanger 22 can be a micro-channel heat exchanger, and the second fins 222 have micro-channels formed therein. The liquid can effectively dissipate heat in the micro-channels, thereby improving the heat dissipation effect of the liquid. At the same time, the micro-channel heat exchanger has a small volume and a large heat exchange coefficient, thereby reducing the occupied space and improving the heat exchange efficiency.

[0071] By arranging a plurality of first fins 122 and forming a first flow passage for gas flow between any two adjacent first fins 122, the air flow passing through the first flow passage can contact and dissipate heat from the first fins 122, thereby improving the heat dissipation efficiency of the first heat exchanger 12. By arranging a plurality of second fins 222 and forming a second flow passage for gas flow between any two adjacent second fins 222, the air flow passing through the second flow passage can contact and dissipate heat from the second fins 222, thereby improving the heat dissipation efficiency of the second heat exchanger 22.

[0072] In combination Figures 1 to 6 As shown in the drawings, 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 orthographic projection of the second heat exchanger 22 along the first direction X, and the second heat exchanger 22 has a third portion 221.

[0073] 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. The orthographic projection of the first heat exchanger 12 along the first direction X is completely within the orthographic projection of the second heat exchanger 22 along the first direction X. That is, all of the first heat exchanger 12 is a first portion, the second heat exchanger 22 includes a second portion and a third portion 221, and the orthographic projection of the first heat exchanger 12 along the first direction X completely coincides with the orthographic projection of the second portion along the first direction X. As Figure 6As shown, the area surrounded by the outer rectangular frame is the front projection view of the second heat exchanger 22 along the first direction X, and the area surrounded by the inner rectangular frame is the front projection view of the first heat exchanger 12 along the first direction X, wherein the overlapping part of the inner rectangular frame and the outer rectangular frame is the first area S1, and the area of the outer rectangular frame not covered by the inner rectangular frame is the second area S2.

[0074] By forming the third part 221 on the second heat exchanger 22, only the interval size of the second fins 222 on the second heat exchanger 22 along the second direction needs to be adjusted, so as to improve the heat dissipation efficiency of the first heat exchanger 12 and the second heat exchanger 22.

[0075] In combination Figures 1 to 6 As shown, in some embodiments of the present application, the size of the second flow passage area in the second part along the second direction Y is greater than the size of the second flow passage area in the third part 221 along the second direction Y; and / or, the size of the first flow passage area along the second direction Y is greater than the size of the second flow passage area in the third part 221 along the second direction Y.

[0076] Specifically, the size of the second flow passage area in the second part along the second direction Y is greater than the size of the second flow passage area in the third part 221 along the second direction Y, that is, the interval size between any two adjacent second fins 222 in the second part is greater than the interval size between any two adjacent second fins 222 in the third part 221, so as to increase the ventilation quantity per unit area of the second part relative to the third part 221. Optionally, when the size of the second fin 222 along the second direction Y is unchanged, the size of the second part along the second direction Y can be increased, so as to increase the interval size of the two adjacent second fins 222 along the second direction Y in the second part. 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 size of the second fin 222 along the second direction Y in the second part can be reduced, so as to increase the interval size of the two adjacent second fins 222 along the second direction Y in the second part. Alternatively, the size of the second part along the second direction Y can be increased, and the size of the second fin 222 along the second direction Y in the second part can be reduced at the same time, so as to increase the interval size of the two adjacent second fins 222 along the second direction Y in the second part.

[0077] Optionally, the size of the first flow-through region along the second direction Y is greater than the size of the second flow-through region along the second direction Y in the third portion 221, i.e., the interval between any two adjacent first fins 122 in the first portion 121 is greater than the interval between any two adjacent second fins 222 in the third portion 221, so that the ventilation amount per unit area of the first portion 121 can be increased relative to the third portion 221. Optionally, the interval between any two adjacent first fins 122 in the first portion 121 can be equal to the interval between any two adjacent second fins 222 in the second portion, and the first fins 122 and the second fins 222 are arranged opposite to each other along the first direction X.

[0078] By setting the size of the second flow-through region along the second direction Y in the second portion to be greater than the size of the second flow-through region along the second direction Y in the third portion 221, the ventilation amount per unit area of the second flow-through region can be increased, thereby reducing the airflow resistance of the airflow flowing through the second portion, increasing the airflow 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 flow-through region along the second direction Y to be greater than the size of the second flow-through region along the second direction Y in the third portion 221, the ventilation amount per unit area of the first flow-through region can be increased, thereby reducing the airflow resistance of the airflow flowing through the second portion, increasing the airflow velocity, and further improving the heat dissipation effect of the first heat exchanger 12 and the second heat exchanger 22.

[0079] In combination with FIGS. 1, 2, 3, and 4, Figure 3 and Figure 7 As shown in some embodiments of the present application, 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 have an overlapping region, and the first heat exchanger 12 and the second heat exchanger 22 each have a third portion 221.

[0080] 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 have a partial overlapping region, and form a first region S1. As shown in Figure 7 the larger rectangular box encloses the orthographic projection of the second heat exchanger 22 along the first direction X, and the smaller rectangular box encloses the orthographic projection of the first heat exchanger 12 along the first direction X, wherein the overlapping part of the two rectangular boxes is the first region S1, and the unobstructed area of each of the two rectangular boxes is a second region 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 region S2.

[0081] By providing the third portion 221 on the first heat exchanger 12 and the second heat exchanger 22 respectively, the relative positions of the first heat exchanger 12 and the second heat exchanger 22 can be adjusted.

[0082] In combination with FIGS. 1, 2, 3, and 4,Figures 1 to 3 As shown in some embodiments of the present application, a flow resistance structure (not shown in the figure) is further arranged in the air supply channel 31, and the projection of the flow resistance structure along the first direction X has an overlapping area with the second area S2, and the flow resistance structure is arranged at the windward side of the first heat exchanger 12 or the second heat exchanger 22.

[0083] Specifically, the flow resistance structure can be a flow resistance plate, and the flow resistance plate is provided with a ventilation opening penetrating therethrough, so that the airflow in the air supply channel 31 can be resisted by the flow resistance plate during flowing to the first heat exchanger 12 or the second heat exchanger 22, and can flow to the first heat exchanger 12 or the second heat exchanger 22 through the ventilation opening. Optionally, when the projection of the first heat exchanger 12 along the first direction X is completely within the projection of the second heat exchanger 22 along the first direction X, the flow resistance structure can be arranged at the windward side of the third part 221 of the second heat exchanger 22. Optionally, the flow resistance structure can be a plurality of flow resistance strips, and the plurality of flow resistance strips are arranged at intervals and form a channel for airflow to flow through.

[0084] By arranging the flow resistance structure at the windward side of the first heat exchanger 12 and the second heat exchanger 22, the flow resistance 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, making the heat dissipation efficiency of the first part 121, the second part and the third part 221 consistent, thereby improving the heat dissipation consistency of the first heat exchanger 12 and the second heat exchanger 22 at each position, and further improving the heat dissipation effect of the first heat exchanger 12 and the second heat exchanger 22.

[0085] In combination with Figures 1 to 3 As shown in some embodiments of the present application, the first heat exchanger 12 is arranged at the windward side of the second heat exchanger 22.

[0086] Specifically, the first heat exchanger 12 is arranged at the windward side of the second heat exchanger 22, that is, the air flow 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 orthographic projection of the second heat exchanger 22 along the first direction X, the first heat exchanger 12 can be arranged at the windward side of the second heat exchanger 22. Since the air flow flowing through the first heat exchanger 12 is not blocked by the second heat exchanger 22, the ventilation amount per unit area at each position in the first heat exchanger 12 can be set to be uniform, that is, the interval size along the second direction Y between any two adjacent first fins 122 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 amount per unit area at each position of the second part can be improved compared with the third part 221, that is, the interval size between any two adjacent second fins 222 in the second part is greater than the interval 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.

[0087] By arranging the first heat exchanger 12 at the windward side of the second heat exchanger 22, the air flow 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.

[0088] In combination Figures 1 to 6 As shown in the drawings, in some embodiments of the present application, 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 arranged in the refrigerant medium channel 21, and the third heat exchanger 24 is configured to exchange heat with the heat exchange channel 11.

[0089] Specifically, the compressor 23, the second heat exchanger 22 and the third heat exchanger 24 are sequentially connected in series through the refrigerant medium channel. When it is needed to cool the heat exchange medium, the refrigerant flows through the third heat exchanger 24 and exchanges heat with the heat exchange channel 11, and carries away the heat of the heat exchange medium in the heat exchange channel 11. The refrigerant after being heated is compressed by the compressor 23 and flows into the second heat exchanger 22, and is cooled and radiated by the air flow in the air supply channel 31. By arranging 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 cooperates with the refrigerant system 20 to quickly cool the heat exchange medium, thereby improving the working efficiency of the thermal management device 100 and improving the operation stability of the energy storage device 1000. Optionally, the refrigerant medium channel 21 is also provided with a throttling element 25, which is used to adjust the flow and coldness of the refrigerant in the refrigerant medium channel 21, so as to improve the stability of the refrigerant system 20. Optionally, the throttling element 25 can be a capillary tube, a throttle valve, an expansion valve, etc. Optionally, the third heat exchanger 24 can be a fluorine-water plate heat exchanger.

[0090] By cooperating with 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, so as to radiate the battery device 300 through the heat exchange channel 11 and improve the heat dissipation effect of the battery device 300.

[0091] In combination with Figures 1 to 6 As shown in the drawings, in some embodiments of the present application, the first heat exchanger 12 comprises a heat exchange water tank; and / or, the second heat exchanger 22 comprises a condenser.

[0092] Specifically, the first heat exchanger 12 comprises a heat exchange water tank, which is arranged in the air supply channel 31 and communicates with the heat exchange channel 11. Optionally, the heat exchange system further comprises 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 sequentially connected in series. 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 exchange heat with the battery monomer 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, the heat exchange medium flows through the third heat exchanger 24, so as to quickly cool and radiate the heat exchange medium through the refrigerant system 20.

[0093] The second heat exchanger 22 comprises a condenser. When heat dissipation is required for the heat exchange medium, 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, the third heat exchanger 24 absorbs heat by evaporation, and the refrigerant in the refrigerant system 20 is compressed by the compressor 23 and then flows into the second heat exchanger 22, and is cooled and dissipated by the airflow in the air supply channel 31.

[0094] By including the heat exchange water tank in the first heat exchanger 12, the heat exchange water tank can concentrate the heat dissipation of the heat exchange medium in the heat exchange channel 11 in the air supply channel 31, thereby improving the heat dissipation effect of the first heat exchanger 12. By including the 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 concentrate the heat dissipation of the refrigerant in the refrigerant medium channel 21 in the air supply channel 31, thereby improving the heat dissipation effect of the second heat exchanger 22.

[0095] In combination Figures 2 to 5 As shown in some embodiments of the present application, the first heat exchanger 12 further comprises a first header 123, a plurality of first fins 122 in the first heat exchanger 12 are arranged at intervals along the second direction Y, and the two ends of the length direction of the first fin 122 are respectively provided with the first header 123. The two ends of the length direction of the plurality of first fins 122 are respectively connected to the first header 123. The first header 123 on one side is provided with a first liquid inlet end 124, and the first header 123 on the other side is provided with a first liquid outlet end 125. The heat exchange medium flows into the inside of the plurality of first fins 122 through the first liquid inlet end 124, and flows out of the outside of the plurality of first fins 122 through the first liquid outlet end 125. The flow of the heat exchange medium in the first fin 122 can be cooled and dissipated by the airflow in the air supply channel 31.

[0096] In combination Figures 2 to 6 As shown in some embodiments of the present application, the second heat exchanger 22 further comprises a second header 223, a plurality of second fins 222 in the second heat exchanger 22 are arranged at intervals along the second direction Y, and the two ends of the length direction of the second fin 222 are respectively provided with the second header 223. The two ends of the length direction of the plurality of second fins 222 are respectively connected to the second header 223. The second header 223 on one side is provided with a second liquid inlet end 224 and a second liquid outlet end 225. The refrigerant flows into the inside of the plurality of second fins 222 through the second liquid inlet end 224, and flows out of the outside of the plurality of second fins 222 through the second liquid outlet end 225. The flow of the refrigerant in the second fin 222 can be cooled and dissipated by the airflow in the air supply channel 31.

[0097] In a second aspect, the present application provides an energy storage device 1000 having the heat management device 100 of any of the above embodiments, the energy storage device 1000 further comprising a cabinet 200 and a battery device 300 arranged in the cabinet 200, and the heat management device 100 is configured to exchange heat with the battery device 300 through the heat exchange system 10 and / or the refrigerant system 20.

[0098] Specifically, the energy storage device 1000 can be an energy storage box or an energy storage cabinet. The cabinet 200 forms the overall appearance structure of the energy storage device 1000, and an accommodation cavity for accommodating the battery device 300 and at least part of the heat management device 100 is formed in the interior of the cabinet 200. The number of battery devices 300 can be multiple, and the multiple battery devices 300 are arranged in sequence along the vertical direction and form a battery cluster.

[0099] By arranging the heat management device 100, the heat management device 100 can exchange heat with the battery device 300 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.

[0100] In combination Figures 1 to 3 As shown in the drawings, in some embodiments of the present application, the cabinet 200 is formed with an air inlet and an air outlet, and the interior of the cabinet 200 is formed with an air supply channel 31 communicating with the air inlet and the air outlet.

[0101] Specifically, the interior of the cabinet 200 is formed with the air supply channel 31, the top wall or the side wall of the cabinet 200 is formed with the air outlet, the air outlet is arranged above at least part of the second heat exchanger 22, and the side wall of the cabinet 200 is further formed with the air inlet, the air inlet is arranged below at least part of the first heat exchanger 12, so that the airflow outside the cabinet 200 enters the air supply channel 31 through the air inlet, and then flows through the first heat exchanger 12 and the second heat exchanger 22 in sequence, and flows out through the air outlet. Optionally, the air cooling system 30 further comprises a fan 32, and the fan 32 is arranged at the air outlet and is used to guide the airflow to flow into the interior of the cabinet 200 through the air inlet and to flow out to the outside of the cabinet 200 through the air outlet.

[0102] By arranging the air supply channel 31 in the interior of the cabinet 200, the first heat exchanger 12 and the second heat exchanger 22 can be arranged in the air supply channel 31 in the interior of the cabinet 200, so that the airflow in the air supply channel 31 can dissipate heat for the first heat exchanger 12 and the second heat exchanger 22, thereby improving the heat dissipation effect of the heat exchange system 10 and / or the refrigerant system 20 on the battery device 300.

[0103] The above description is only a summary of the technical solutions of the present application. In order to enable the technical means of the present application to be more clearly understood, and to be implemented according to the content of the description, and in order to enable the above and other purposes, characteristics and advantages of the present application to be more apparent and easy to understand, the following specific embodiments of the present application are described.

[0104] In combination with Figures 1 to 6 As shown in the drawings, the present application provides an energy storage device 1000, which comprises a box body 200 and a battery device 300 arranged in the box body 200, and further comprises a heat management device 100 configured to exchange heat with the battery device 300.

[0105] Optionally, the heat management device 100 comprises a heat exchange system 10, a refrigerant system 20 and an air cooling system 30. The heat exchange system 10 comprises a heat exchange channel 11 for a heat exchange medium to flow through. The heat exchange system 10 further comprises a first heat exchanger 12 in communication with the heat exchange channel 11. The refrigerant system 20 comprises a refrigerant medium channel 21 for a refrigerant to flow through. The refrigerant medium channel 21 is configured to exchange heat with the heat exchange channel 11 through phase change of the refrigerant. The refrigerant system 20 further comprises a second heat exchanger 22 in communication with the refrigerant medium channel 21. The air cooling system 30 forms an air supply channel 31 for a gas to flow through. 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 at a windward side of the second heat exchanger 22. The first heat exchanger 12 comprises a first portion 121, and the second heat exchanger 22 comprises a second portion. A projection of the first portion 121 along a first direction X and a projection of the second portion along the first direction X overlap each other and form a first region S1. At least one of the first heat exchanger 12 and the second heat exchanger 22 further comprises a third portion 221. A projection of the third portion 221 along the first direction X has a second region S2 arranged outside the first region S1. The ventilation quantity per unit area of at least one of the first portion 121 and the second portion is greater than the ventilation quantity per unit area of the third portion 221. The first direction X is a flow direction of the gas in the air supply channel 31, or the first direction X is arranged at an angle with the flow direction of the gas in the air supply channel 31.

[0106] Optionally, the first heat exchanger 12 comprises a plurality of first fins 122 arranged at intervals along a second direction Y. A first flow-through region for the gas to flow through is formed between any two adjacent first fins 122. The second heat exchanger 22 comprises a plurality of second fins 222 arranged at intervals along the second direction Y. A second flow-through region for the gas to flow through is formed between any two adjacent second fins 222. The second direction Y intersects the first direction X.

[0107] Optionally, the first heat exchanger 12 is entirely within the 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 passage in the second portion along the second direction Y is greater than the size of the second flow passage in the third portion 221 along the second direction Y. The size of the first flow passage along the second direction Y is greater than the size of the second flow passage in the third portion 221 along the second direction Y.

[0108] Optionally, the refrigerant system 20 further comprises a third heat exchanger 24 and a compressor 23, the compressor 23, the second heat exchanger 22 and the third heat exchanger 24 are arranged in the refrigerant medium passage 21, and the third heat exchanger 24 is configured to exchange heat with the heat exchange passage 11.

[0109] Optionally, the first heat exchanger 12 comprises a heat exchange water tank, the second heat exchanger 22 comprises a condenser, and the third heat exchanger 24 comprises an evaporator.

[0110] Optionally, the cabinet 200 is formed with an air inlet and an air outlet, and the cabinet 200 is formed with an air supply passage 31 communicating with the air inlet and the air outlet.

[0111] Optionally, the air supply passage 31 is further provided with a flow resistance structure, the flow resistance structure has an overlapping area with the second area S2 along the projection of the first direction X, and the flow resistance structure is arranged on the windward side of the second heat exchanger 22.

[0112] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should be covered in the scope of the claims and the description of the present application. Especially, as long as there is no structural conflict, each technical feature mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling within the scope of the claims.

Claims

1. A thermal management device, characterized by, The heat exchange system comprises a heat exchange passage for a heat exchange medium to flow through, and a first heat exchanger in communication with the heat exchange passage. The refrigerant system comprises a refrigerant medium passage for a refrigerant to flow through, and is configured to exchange heat with the heat exchange passage through phase change of the refrigerant; the refrigerant system further comprises a second heat exchanger in communication with the refrigerant medium passage. The air cooling system forms an air supply passage for a gas to flow through. The first heat exchanger is arranged on the windward side of the second heat exchanger, and the first heat exchanger and the second heat exchanger are arranged in the air supply passage; the first heat exchanger comprises a first part, and the second heat exchanger comprises a second part; a projection of the first part along a first direction and a projection of the second part along the first direction overlap each other and form a first region; the second heat exchanger further comprises a third part, and a projection of the third part along the first direction has a second region outside the first region; 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 heat exchanger comprises a plurality of first fins arranged at intervals along a second direction, and a first flow-through region for the gas to flow through is formed between any two adjacent first fins; the second heat exchanger comprises a plurality of second fins arranged at intervals along the second direction, and a second flow-through region for the gas to flow through is formed between any two adjacent second fins; the size of the second flow-through region in the second part along the second direction is greater than the size of the second flow-through region in the third part along the second direction. The first direction is the airflow flow direction in the air supply passage, or the first direction is arranged at an angle with the airflow flow direction in the air supply passage, and the second direction intersects the first direction. The projection of the first heat exchanger along the first direction is completely within the projection of the second heat exchanger along the first direction.

2. The thermal management device of claim 1, wherein, The size of the first flow-through region along the second direction is greater than the size of the second flow-through region in the third part along the second direction.

3. The thermal management device of claim 2, wherein, Part of the projection of the first heat exchanger along the first direction and part of the projection of the second heat exchanger along the first direction have an overlapping region, and the first heat exchanger and the second heat exchanger each have the third part.

4. The thermal management device of claim 1, wherein, The air supply passage further comprises a flow resistance structure, and a projection of the flow resistance structure along the first direction overlaps the second region, and the flow resistance structure is arranged on the windward side of the first heat exchanger or the second heat exchanger.

5. The thermal management device of claim 1, wherein, The refrigerant system further comprises a third heat exchanger and a compressor, and the compressor, the second heat exchanger and the third heat exchanger are arranged in the refrigerant medium passage; the third heat exchanger is configured to exchange heat with the heat exchange passage.

6. The thermal management device of any one of claims 1 to 5, wherein, The first heat exchanger comprises a heat exchange water tank; and / or the second heat exchanger comprises a condenser.

7. The thermal management device of any one of claims 1 to 5, wherein, ​ 8. An energy storage device, characterized by, The thermal management device of any one of claims 1-7, wherein the energy storage device further comprises a housing and a battery device disposed within the housing, and the thermal management device is configured to exchange heat with the battery device.

9. The energy storage device of claim 8, wherein, The housing is formed with an air inlet and an air outlet, and an inside of the housing is formed with the air supply channel that communicates the air inlet and the air outlet.

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