Liquid cooling equipment and new energy system

Abstract

The utility model provides a liquid cooling device and a new energy system, the liquid cooling device is used for heat exchange with a plurality of external devices, the liquid cooling device comprises a liquid cooling unit, a liquid inlet head and a liquid outlet head, the liquid outlet head is used for being connected with a liquid injection port of the external device, and the liquid inlet head is used for being connected with a liquid return port of the external device. The plurality of external devices include at least two of a photovoltaic device, an energy storage device, and a charging device, and an electric vehicle. A liquid inlet of the liquid cooling unit is connected with the liquid inlet head, and a liquid outlet of the liquid cooling unit is connected with the liquid outlet head. According to the invention, at least two devices in the new energy system can be cooled, and the operation reliability of the new energy system is improved.

Description

Technical Field

[0001] The present application relates to the field of thermal management, and in particular to a liquid cooling device and a new energy system. Background Art

[0002] New energy systems include charging equipment, photovoltaic equipment, and energy storage devices. When at least some of these devices are in operation, they generate heat. If this heat cannot be effectively dissipated, it will affect the reliable operation of the new energy system. Therefore, heat dissipation is necessary for the devices in these systems. Utility Model Content

[0003] The present application provides a liquid cooling device and a new energy system, which can dissipate heat for at least two devices in the new energy system and improve the reliability of the operation of the new energy system.

[0004] In a first aspect, a liquid cooling device is provided. The liquid cooling device is configured to exchange heat with multiple external devices. The liquid cooling device includes a liquid cooling unit, a liquid inlet head, and a liquid outlet head. The liquid outlet head is configured to connect to a liquid inlet of the external device, and the liquid inlet head is configured to connect to a liquid return port of the external device. The multiple external devices include at least two of a photovoltaic device, an energy storage device, and a charging device, as well as an electric vehicle. The liquid inlet of the liquid cooling unit is connected to the liquid inlet head, and the liquid outlet of the liquid cooling unit is connected to the liquid outlet head.

[0005] In an embodiment of the present application, the liquid cooling device delivers coolant to at least two devices among the photovoltaic device, the energy storage device and the charging device, and the electric vehicle through a liquid outlet head. The coolant can absorb heat from the at least two devices and the electric vehicle. The coolant after absorbing the heat flows into the liquid cooling unit through the liquid inlet head, thereby bringing the heat generated by the at least two devices and the electric vehicle to the liquid cooling unit, realizing heat dissipation for the at least two devices and the electric vehicle, and improving the reliability of the system operation.

[0006] Furthermore, in the embodiments of the present application, the liquid cooling device can dissipate heat for multiple devices, which is equivalent to these multiple devices sharing a single liquid cooling device, thereby improving energy efficiency and thus improving utilization efficiency. Furthermore, in the embodiments of the present application, multiple devices sharing a single liquid cooling device can reduce purchase and maintenance costs, thereby achieving optimal costs.

[0007] In conjunction with the first aspect, in one possible implementation, a liquid cooling unit includes a compressor, N first heat exchangers, N expansion valves, and a second heat exchanger, wherein the N first heat exchangers and the N expansion valves are connected in a one-to-one correspondence, and each expansion valve is connected to a corresponding first heat exchanger, a compressor, and a second heat exchanger in sequence, where N is an integer greater than or equal to 2. The first heat exchanger includes a first refrigerant passage and a first coolant passage, the first refrigerant passage being configured to exchange heat with the first coolant passage. The second heat exchanger includes a second refrigerant passage, each first refrigerant passage being connected between the compressor and a corresponding expansion valve, and the second refrigerant passage being connected between the compressor and the N expansion valves. The liquid inlet of the first coolant passage is connected to a liquid inlet header, and the liquid outlet of the first coolant passage is connected to a liquid outlet header.

[0008] In the embodiment of the present application, each expansion valve forms a refrigerant passage with the corresponding first heat exchanger, compressor, and second heat exchanger. Since each first heat exchanger includes a first coolant passage, the liquid cooling device can transport coolant to different external devices through the liquid outlets of different first coolant passages. The coolant that absorbs heat flows into the liquid cooling unit through the liquid inlet of the corresponding connected first coolant passage, thereby achieving heat dissipation for the external device.

[0009] In particular, when the liquid outlet of each first cooling liquid passage is connected to a different liquid outlet head, and the liquid inlet of each first cooling liquid passage is connected to a different liquid inlet head, when the liquid cooling device transports cooling liquid to different external devices through different first cooling liquid passages, the cooling liquids in the liquid cooling passages of different external devices can be made independent of each other, avoiding the mutual influence of the cooling liquids in the liquid cooling passages of different devices, thereby better meeting the cooling liquid needs of different external devices and ensuring the normal operation of each external device.

[0010] In addition, the first heat exchanger includes a first refrigerant passage and a first coolant passage. The first refrigerant passage and the first coolant passage perform heat exchange. This heat dissipation method has a high heat dissipation efficiency, which is beneficial to further improve the heat dissipation effect of the coolant on external equipment to meet the growing heat dissipation needs of external equipment.

[0011] In conjunction with the first aspect, in one possible implementation, the liquid cooling device includes N liquid outlet heads and N liquid inlet heads. The N liquid outlet heads are connected to the liquid outlets of the N first cooling liquid passages in a one-to-one correspondence, and the N liquid inlet heads are connected to the liquid inlets of the N first cooling liquid passages in a one-to-one correspondence.

[0012] In an embodiment of the present application, the liquid cooling device includes N liquid outlet heads and N liquid inlet heads. These N liquid outlet heads and N liquid inlet heads can be used to connect to external devices in a one-to-one correspondence. Thus, by controlling the different liquid outlet heads and liquid inlet heads to deliver coolant, heat can be dissipated to different external devices to meet the heat dissipation requirements of different external devices. In particular, in some scenarios, some external devices do not require heat dissipation. For example, in a scenario where a photovoltaic device delivers electricity to a charging device, the liquid cooling device only needs to dissipate heat for the photovoltaic device and the charging device, without dissipating heat for the energy storage device. This allows heat dissipation of external devices that require heat dissipation, improves the flexibility of heat dissipation for external devices, and further ensures the reliable operation of the external devices.

[0013] In conjunction with the first aspect, in one possible implementation, the liquid cooling device further includes a liquid storage tank, the liquid storage tank including N chambers, the N chambers being disconnected, the liquid outlets of the N first cooling liquid passages being connected to the N liquid outlet heads in a one-to-one correspondence through the N chambers. The liquid storage tank includes N first liquid outlets and N first liquid inlets, the N first liquid outlets being connected to the N chambers in a one-to-one correspondence, the N first liquid inlets being connected to the N chambers in a one-to-one correspondence, the liquid outlets of the first cooling liquid passages being connected to the corresponding first liquid inlets, and the first liquid outlets being connected to the corresponding liquid outlet heads.

[0014] In an embodiment of the present application, the liquid storage tank includes N non-connected chambers, and the N first liquid outlets and N first liquid inlets of the liquid storage tank are all connected to the N chambers in a one-to-one correspondence. When the temperature of the coolant required by different external devices connected to the liquid cooling device is different, the temperature of the coolant in these N chambers can be controlled according to the temperature of the coolant required by the different external devices to meet the temperature requirements of the different external devices. In order to continuously meet the temperature requirements of different external devices, by controlling the size of the valve openings of the N expansion valves in the liquid cooling unit, the temperature of the coolant flowing into the corresponding chambers of the liquid storage tank from the different first liquid inlets can be controlled, thereby continuously meeting the temperature requirements of the coolant delivered from the same liquid cooling device to different devices, which is conducive to the normal heat dissipation of the liquid cooling device to different external devices, and further conducive to the normal operation of the external devices.

[0015] In combination with the first aspect, in a possible implementation, the liquid storage tank further includes N second liquid outlets, the N second liquid outlets are connected to the N chambers in a one-to-one correspondence, and the N second liquid outlets are connected to the liquid inlets of the N first coolant passages in a one-to-one correspondence.

[0016] In the embodiment of the present application, since the N second liquid outlets of the liquid storage tank are connected to the N chambers in a one-to-one correspondence, and the N second liquid outlets are connected to the liquid inlets of the N first cooling liquid passages in a one-to-one correspondence, therefore, when the temperature of the coolant in any chamber in the liquid storage tank is high, the coolant in the chamber can be controlled to flow into the corresponding first cooling liquid passage through the corresponding second liquid outlet. The coolant flowing into the first cooling liquid passage exchanges heat with the heat exchange liquid and flows out from the liquid outlet of the corresponding first cooling liquid passage, and flows into the corresponding chamber through the corresponding first liquid inlet, thereby realizing the cooling circulation of the coolant in any chamber in the liquid storage tank, achieving the purpose of lowering the temperature of the coolant in the liquid storage tank, thereby ensuring that the temperature of the coolant in the liquid storage tank is maintained within a reasonable temperature range, which is beneficial to the heat dissipation of the liquid cooling equipment to the external equipment.

[0017] In combination with the first aspect, in a possible implementation, at least one of the N liquid inlet heads is connected to the liquid inlet of the corresponding at least one first cooling liquid passage through the corresponding at least one first liquid inlet and the corresponding at least one second liquid outlet.

[0018] In the embodiment of the present application, since at least one of the N liquid inlet heads is connected to the liquid inlet of the corresponding at least one first cooling liquid passage through the corresponding at least one first liquid inlet and the corresponding at least one second liquid outlet, the cooling liquid flowing in from the liquid return head can directly enter the liquid storage tank through the at least one first liquid inlet without being dissipated by the liquid cooling unit before entering the liquid storage tank. This can avoid the waste of energy caused by the low-temperature cooling liquid flowing in from the liquid inlet head entering the liquid cooling unit, especially for devices with lower heat generation, such as charging guns, the advantages are more prominent.

[0019] If it is necessary to cool the temperature of the coolant in the liquid storage tank, the liquid storage tank outputs the coolant through at least one second liquid outlet, and the coolant flows into the liquid cooling unit through the liquid inlet of the liquid cooling unit. The liquid cooling unit can cool the coolant flowing out of the at least one second liquid outlet of the liquid storage tank by heat exchange, and the cooled coolant flows into the liquid storage tank through the liquid outlet of the liquid cooling unit and the corresponding first liquid inlet, thereby cooling the coolant in the liquid storage tank, which is beneficial to the heat dissipation of the liquid cooling equipment to the external equipment, and thus beneficial to the normal operation of the external equipment.

[0020] In conjunction with the first aspect, in one possible implementation, a liquid cooling unit includes a compressor, a first heat exchanger, an expansion valve, and a second heat exchanger connected in sequence. The first heat exchanger includes a first refrigerant passage and a first coolant passage, the first refrigerant passage being configured to exchange heat with the first coolant passage. The second heat exchanger includes a second refrigerant passage, both the first and second refrigerant passages being connected between the compressor and the expansion valve, the liquid inlet of the first coolant passage being connected to a liquid inlet header, and the liquid outlet of the first coolant passage being connected to a liquid outlet header.

[0021] In an embodiment of the present application, the liquid cooling unit includes a compressor, a first heat exchanger, an expansion valve and a second heat exchanger. The first heat exchanger includes a first refrigerant passage and a first coolant passage. The first refrigerant passage and the first coolant passage perform heat exchange. The liquid cooling unit can use liquid-liquid heat exchange to dissipate heat from the coolant flowing in from the external device. The liquid cooling unit has a high efficiency in dissipating heat to the coolant, which is conducive to further improving the heat dissipation effect of the coolant on the external device to meet the growing heat dissipation needs of the external device.

[0022] In conjunction with the first aspect, in one possible implementation, the liquid cooling device further includes a liquid storage tank, the liquid storage tank including a housing and at least one partition plate, the at least one partition plate being used to divide the housing into an upper chamber and a lower chamber, the upper chamber and the lower chamber being connected. The housing is provided with a first liquid inlet and a first liquid outlet, the first liquid inlet and the first liquid outlet are both located in the housing corresponding to the lower chamber, the first liquid inlet is connected to the liquid outlet of the first coolant passage, and the first liquid outlet is connected to the liquid inlet of the first coolant passage. The housing is also provided with a second liquid outlet, the second liquid outlet is located in the housing corresponding to the upper chamber, and the second liquid outlet is connected to the liquid inlet of the first coolant passage.

[0023] The embodiment of the present application is designed with a partition plate that separates the box into an upper chamber and a lower chamber. Generally, since the coolant with higher temperature flows upward and the coolant with lower temperature flows downward, the temperature of the coolant in the upper chamber of the box is higher, and the temperature of the coolant in the lower chamber is lower, which is equivalent to isolating the coolants of different temperatures in the box. In addition, because the first liquid outlet is located in the box corresponding to the lower chamber, when the liquid cooling device delivers coolant to the external device, the temperature of the coolant delivered to the external device through the first liquid outlet is lower, which can further improve the efficiency of liquid cooling and heat dissipation of the external device, thereby improving the heat dissipation effect of the liquid cooling device on the external device.

[0024] The liquid storage tank also includes a second liquid outlet. Coolant flowing out of the second outlet exchanges heat with the liquid cooling unit, then flows out of the outlet of the liquid cooling unit and into the liquid storage tank through the first liquid inlet. This allows for a cooling cycle of the coolant within the liquid cooling device, thereby lowering the temperature of the coolant in the liquid storage tank. In particular, because the second outlet is located in the housing corresponding to the upper chamber, the coolant flowing out of the second outlet is at a higher temperature, thereby improving the heat exchange efficiency of the coolant and enhancing the heat dissipation effect.

[0025] In conjunction with the first aspect, in one possible implementation, the box includes a top plate, a bottom plate, and multiple side plates, the top plate and the bottom plate being disposed opposite each other, and the multiple side plates being located between the top plate and the bottom plate. The at least one partition plate includes a single partition plate disposed between the top plate and the bottom plate, with a space between the single partition plate and the at least one side plate; or the at least one partition plate includes a plurality of partition plates disposed between the top plate and the bottom plate, with the plurality of partition plates spaced apart and arranged along a first direction perpendicular to a direction from the top plate toward the bottom plate.

[0026] In an embodiment of the present application, when the liquid storage tank includes a partition plate, a partition plate is arranged between the top plate and the bottom plate, and there is a gap between the partition plate and at least one side plate, and the gap can connect the two chambers, so that the coolant in the lower chamber flows into the upper chamber through the gap, and the coolant in the upper chamber flows out through the second liquid outlet, and flows into the lower chamber from the first liquid inlet after passing through the liquid cooling unit. During this process, the liquid cooling unit can take away the heat of the coolant flowing out of the second liquid outlet, and the cooled coolant returns to the liquid storage tank through the first liquid inlet, thereby realizing the cooling circulation of the coolant in the liquid cooling equipment, ensuring that the temperature of the coolant in the box is maintained within a reasonable temperature range, which is conducive to liquid cooling and heat dissipation of electric vehicles.

[0027] When the liquid storage tank includes multiple partition plates, each two adjacent partition plates are spaced apart, and the multiple partition plates are spaced apart along the first direction, so that the cooling liquid in the lower chamber flows into the upper chamber through the multiple intervals, and the cooling liquid in the upper chamber flows out through the second liquid outlet, and flows into the lower chamber from the first liquid inlet after passing through the liquid cooling unit. During this process, the liquid cooling unit can take away the heat of the cooling liquid flowing out of the second liquid outlet, and the cooled cooling liquid returns to the liquid storage tank through the first liquid inlet, thereby realizing the cooling circulation of the cooling liquid in the liquid cooling device, ensuring that the temperature of the cooling liquid in the box is maintained within a reasonable temperature range, which is conducive to liquid cooling and heat dissipation of external equipment.

[0028] Moreover, since the embodiment of the present application is designed to arrange multiple partition plates at intervals along the first direction, the flow rate of the coolant from the lower chamber to the upper chamber can be accelerated, thereby accelerating the cooling rate of the coolant in the box, which is further beneficial to achieve liquid cooling and heat dissipation of external equipment.

[0029] In combination with the first aspect, in a possible implementation, the liquid cooling unit also includes a third heat exchanger and a fan, the air outlet of the fan is facing the third heat exchanger and the second heat exchanger, the liquid inlet of the third heat exchanger is connected to the liquid inlet head or the second liquid outlet, and the liquid outlet of the third heat exchanger is connected to the liquid outlet head.

[0030] In an embodiment of the present application, when the liquid cooling device further includes a third heat exchanger and a fan, the liquid cooling device can achieve heat dissipation of the coolant through different modes. When the liquid cooling device achieves heat dissipation of the coolant in a natural heat dissipation mode, there is no need to start the compressor, and the compressor, the first heat exchanger, and the second heat exchanger are in an inoperative state, which can reduce power consumption and improve heat dissipation efficiency. When the liquid cooling device achieves heat dissipation of the coolant in a mechanical refrigeration mode, the temperature requirement for the outdoor environment is relatively low. Even if the temperature environment is high, the heat dissipation of the coolant can be achieved, and the reliability is high. The present application can flexibly switch the mode of heat dissipation of the coolant according to the temperature of the outdoor environment, which can not only achieve heat dissipation of the coolant, but also reduce power consumption, improve heat dissipation efficiency, and improve reliability.

[0031] In addition, in the mechanical refrigeration mode, the coolant that absorbs heat flows into the liquid inlet head and dissipates heat once before flowing into the liquid storage tank. In the process of cooling the coolant that absorbs heat, there is less loss and the heat dissipation efficiency is higher.

[0032] In combination with the first aspect, in one possible implementation, the second heat exchanger further includes a second coolant passage, and the second refrigerant passage is used to perform heat exchange with the second coolant passage. The liquid cooling unit further includes a third heat exchanger, a fan, and 2N three-way valves, the air outlet of the fan facing the third heat exchanger, the liquid outlet of the third heat exchanger connected to the liquid inlet of the second coolant passage, and the liquid inlet of the third heat exchanger connected to the liquid outlet of the second coolant passage. N three-way valves are connected to the N first heat exchangers in a one-to-one correspondence, and the other N three-way valves are all connected to the third heat exchanger. The first valve port of each of the N three-way valves is connected to the liquid inlet of the corresponding first coolant passage, the second valve port of each of the N three-way valves is connected to the liquid inlet of the third heat exchanger, and the third valve port of each of the N three-way valves is connected to the liquid inlet head. In addition, the first valve port of each of the N three-way valves is connected to the liquid outlet of the third heat exchanger, the second valve port of each of the N three-way valves is connected to the liquid inlet of the second coolant passage, and the third valve port of each of the N three-way valves is connected to the liquid outlet head.

[0033] The embodiment of the present application adds a third heat exchanger and a fan, and the liquid cooling device can achieve heat dissipation of the coolant in different modes. When the liquid cooling device achieves heat dissipation of the coolant in the natural heat dissipation mode, there is no need to start the compressor, which can reduce power consumption and improve heat dissipation efficiency. When the liquid cooling device achieves heat dissipation of the coolant in the mechanical refrigeration mode, the temperature requirement for the outdoor environment is low. Even if the temperature environment is high, the coolant can still be dissipated, and the reliability is high. The present application can flexibly switch the coolant heat dissipation mode according to the temperature of the outdoor environment, which can not only achieve heat dissipation of the coolant, but also reduce power consumption, improve heat dissipation efficiency, and improve reliability.

[0034] Moreover, based on this design, the second coolant passage can be shared in the two heat dissipation modes, which is beneficial to the integration of the liquid cooling equipment and further to the miniaturized design of the liquid cooling equipment.

[0035] Furthermore, with this design, the fan outlet faces only the third heat exchanger, reducing wind resistance and improving heat dissipation. Furthermore, in mechanical cooling mode, the heat-absorbing coolant flows through the inlet header, undergoes two heat exchanges, and then flows into the storage tank. Therefore, this design reduces the heat dissipation requirements of multiple heat exchangers, thereby reducing costs.

[0036] In addition, the embodiment of the present application also includes 2N three-way valves, and every two three-way valves are connected to the corresponding first heat exchanger and the corresponding first liquid inlet. By controlling different three-way valves to conduct different pathways, the liquid cooling device can dissipate heat for different external devices based on different heat dissipation modes, thereby improving the flexibility of the heat dissipation modes adopted by the liquid cooling device when dissipating heat for different external devices.

[0037] In combination with the first aspect, in one possible implementation, the second heat exchanger further includes a second coolant passage, and the second refrigerant passage is used to perform heat exchange with the second coolant passage. The liquid cooling unit further includes a third heat exchanger, a fan, and two three-way valves. The air outlet of the fan faces the third heat exchanger, the liquid outlet of the third heat exchanger is connected to the liquid inlet of the second coolant passage, and the liquid inlet of the third heat exchanger is connected to the liquid outlet of the second coolant passage. The first valve port of one of the three-way valves is connected to the liquid inlet of the first coolant passage, the second valve port of one of the three-way valves is connected to the liquid inlet of the third heat exchanger, and the third valve port of one of the three-way valves is connected to the liquid inlet head; the first valve port of another three-way valve is connected to the liquid outlet of the third heat exchanger, the second valve port of another three-way valve is connected to the liquid inlet of the second coolant passage, and the third valve port of another three-way valve is connected to the liquid outlet head.

[0038] The embodiment of the present application adds a third heat exchanger and a fan, and the liquid cooling device can achieve heat dissipation of the coolant in different modes. When the liquid cooling device achieves heat dissipation of the coolant in the natural heat dissipation mode, there is no need to start the compressor, which can reduce power consumption and improve heat dissipation efficiency. When the liquid cooling device achieves heat dissipation of the coolant in the mechanical refrigeration mode, the temperature requirement for the outdoor environment is low. Even if the temperature environment is high, the coolant can still be dissipated, and the reliability is high. The present application can flexibly switch the coolant heat dissipation mode according to the temperature of the outdoor environment, which can not only achieve heat dissipation of the coolant, but also reduce power consumption, improve heat dissipation efficiency, and improve reliability.

[0039] Moreover, based on this design, the second coolant passage can be shared in the two heat dissipation modes, which is beneficial to the integration of the liquid cooling equipment and further to the miniaturized design of the liquid cooling equipment.

[0040] Furthermore, with this design, the fan outlet faces only the third heat exchanger, reducing wind resistance and improving heat dissipation. Furthermore, in mechanical cooling mode, the heat-absorbing coolant flows through the inlet header, undergoes two heat exchanges, and then flows into the storage tank. Therefore, this design reduces the heat dissipation requirements of multiple heat exchangers, thereby reducing costs.

[0041] In conjunction with the first aspect, in one possible implementation, the liquid cooling unit includes 2N one-way valves and N pumps. The N one-way valves are connected to the first refrigerant passages of the N first heat exchangers in a one-to-one correspondence, wherein the inlet of each of the N one-way valves is connected to the outlet of the corresponding first refrigerant passage, and wherein the outlet of each of the N one-way valves is connected to the inlet of the second refrigerant passage; another N one-way valves are connected to the first refrigerant passages of the N first heat exchangers in a one-to-one correspondence, wherein the outlet of each of the other N one-way valves is connected to the inlet of the corresponding first refrigerant passage, and the inlet of each of the other N one-way valves is connected to the outlet of the second refrigerant passage; and N pumps are connected to the first refrigerant passages of the N first heat exchangers in a one-to-one correspondence, and the outlet of each of the N pumps is connected to the inlet of the corresponding first refrigerant passage, and the inlet of each of the N pumps is connected to the outlet of the second refrigerant passage.

[0042] The embodiment of the present application adds 2N one-way valves and N pumps, and the liquid cooling device can achieve heat dissipation of the coolant through different modes. When the liquid cooling device achieves heat dissipation of the coolant in the natural heat dissipation mode, there is no need to start the operation of the compressor, which can reduce power consumption and improve heat dissipation efficiency. When the liquid cooling device achieves heat dissipation of the coolant in the mechanical refrigeration mode, the temperature requirement for the outdoor environment is low. Even if the temperature environment is high, the coolant can still be dissipated, and the reliability is high. The present application can flexibly switch the mode of heat dissipation of the coolant according to the temperature of the outdoor environment, which can not only achieve heat dissipation of the coolant, but also reduce power consumption, improve heat dissipation efficiency, and improve reliability.

[0043] In addition, the design of the 2N one-way valve can also prevent the reverse circulation of the heat exchange fluid, which is beneficial to the cooling cycle of the first refrigerant path, thereby facilitating the normal heat dissipation of external equipment, and further facilitating the normal operation of the external equipment.

[0044] In addition, the liquid cooling unit includes 2N one-way valves and N pumps. By controlling different one-way valves to conduct different paths, the liquid cooling device can dissipate heat for different external devices based on different heat dissipation modes, thereby improving the flexibility of the heat dissipation modes adopted by the liquid cooling device when dissipating heat for different external devices.

[0045] In conjunction with the first aspect, in one possible implementation, the liquid cooling unit includes two one-way valves and a pump, wherein the inlet of one of the one-way valves is connected to the outlet of the first refrigerant passage, the outlet of one of the one-way valves is connected to the inlet of the second refrigerant passage, the inlet of the other one-way valve is connected to the outlet of the second refrigerant passage, and the outlet of the other one-way valve is connected to the inlet of the first refrigerant passage. The outlet of the pump is connected to the inlet of the first refrigerant passage, and the inlet of the pump is connected to the outlet of the second refrigerant passage.

[0046] The embodiment of the present application adds two one-way valves and a pump, and the liquid cooling device can achieve heat dissipation of the coolant in different modes. When the liquid cooling device achieves heat dissipation of the coolant in the natural heat dissipation mode, there is no need to start the compressor, which can reduce power consumption and improve heat dissipation efficiency. When the liquid cooling device achieves heat dissipation of the coolant in the mechanical refrigeration mode, the temperature requirement for the outdoor environment is low. Even if the temperature environment is high, the coolant can still be dissipated, and the reliability is high. The present application can flexibly switch the coolant heat dissipation mode according to the temperature of the outdoor environment, which can not only achieve heat dissipation of the coolant, but also reduce power consumption, improve heat dissipation efficiency, and improve reliability.

[0047] In addition, the design of two one-way valves can also prevent the reverse circulation of the heat exchange fluid, which is conducive to the cooling cycle of the first refrigerant path, thereby facilitating the normal heat dissipation of external equipment, and further facilitating the normal operation of the external equipment.

[0048] In conjunction with the first aspect, in one possible implementation, the liquid cooling device includes a three-way valve, wherein a first valve port of the three-way valve is connected to the second liquid outlet, a second valve port of the three-way valve is connected to the liquid inlet of the first coolant passage, and a third valve port of the three-way valve is connected to a liquid inlet header. When the liquid cooling device is connected to an external device, the three-way valve is used to open a path between the liquid inlet header and the liquid inlet of the first coolant passage. When the liquid cooling device is not connected to an external device, the three-way valve is used to open a path between the second liquid outlet and the liquid inlet of the first coolant passage.

[0049] In an embodiment of the present application, the three valve ports of the three-way valve included in the liquid cooling device are respectively connected to different liquid ports or liquid heads. This facilitates adjustment of the connectivity status of the different valve ports of the three-way valve, so that the liquid cooling device can operate in different working modes, such as internal circulation cooling mode and external circulation cooling mode. When the external device has a heat dissipation requirement, the liquid cooling device can operate in the external circulation cooling mode to achieve liquid cooling heat dissipation for the external device; when the external device does not have a heat dissipation requirement, the liquid cooling device can operate in the internal circulation cooling mode to ensure the stability of the coolant temperature in the liquid storage tank, so that the corresponding needs of the external device can be met when the external device has a heat dissipation requirement, which is conducive to the normal operation of the external device.

[0050] In conjunction with the first aspect, in one possible implementation, the liquid cooling device includes a liquid cooling gun, wherein a liquid outlet and a liquid inlet are located in the liquid cooling gun. The liquid outlet is used to deliver coolant from the liquid cooling device to the electric vehicle, and the liquid inlet is used to deliver coolant from the electric vehicle to the liquid cooling device.

[0051] In this embodiment of the present application, the liquid outlet and inlet are located in the liquid cooling gun. When the liquid cooling gun is connected to an electric vehicle, coolant from the liquid storage tank is delivered to the electric vehicle through the outlet. This coolant absorbs heat generated by the power battery during charging. The heat-absorbed coolant then flows into the liquid cooling unit through the inlet connected to the liquid return port of the electric vehicle, thereby transferring heat generated by the electric vehicle to the liquid cooling unit and dissipating heat from the electric vehicle.

[0052] In the second aspect, the present application provides a new energy system, which includes at least two devices among photovoltaic equipment, energy storage equipment, and charging equipment, and a liquid cooling device in any implementation method of the above-mentioned first aspect, and the liquid cooling device is used to dissipate heat for at least two devices among photovoltaic equipment, energy storage equipment and charging equipment, and electric vehicles.

[0053] In combination with the second aspect, in one possible implementation, the liquid cooling channels of different devices in at least two devices are not connected to each other, and each liquid cooling channel is used to separately receive the coolant of the liquid cooling device; or, the liquid cooling channels of at least some of the devices in at least two devices are connected.

[0054] In an embodiment of the present application, in one implementation, when the liquid cooling device dissipates heat for at least two devices, the liquid cooling channels of the at least two devices may not be connected to each other, so that the liquid cooling channel of each of the at least two devices can separately receive the coolant of the liquid cooling device. In this way, the coolant in the liquid cooling channel of each device will not affect each other, which is beneficial to the normal heat dissipation of each device by the liquid cooling device, and further beneficial to the normal operation of each of the at least two devices.

[0055] In another implementation, when the liquid cooling device dissipates heat for at least two devices, the liquid cooling channels of at least some of the at least two devices are connected, so that the coolant flowing out of one of the devices flows into the other device, or the coolant flowing out of the liquid outlet of the cooling liquid channel of at least some of the devices flows into the liquid cooling unit or liquid storage tank through the same liquid inlet head, or the coolant flowing out through the same liquid outlet head flows into the liquid inlet of the cooling liquid channel of at least some of the devices, which can reduce the number of liquid outlet heads and liquid inlet heads of the liquid cooling device and simplify the design of the liquid cooling device.

[0056] In conjunction with the second aspect, in one possible implementation, the liquid cooling channels of different devices in the at least two devices are not interconnected, and the liquid cooling devices include multiple liquid outlet heads and multiple liquid inlet heads. The multiple liquid outlet heads are configured to connect in a one-to-one correspondence with the liquid inlets of the liquid cooling channels of each of the at least two devices and the liquid inlet of the liquid cooling channels of the electric vehicle; and the multiple liquid inlet heads are configured to connect in a one-to-one correspondence with the liquid outlets of the liquid cooling channels of each of the at least two devices and the liquid outlets of the liquid cooling channels of the electric vehicle.

[0057] In an embodiment of the present application, the liquid cooling channels of each device are not connected to each other, and the coolant in the liquid cooling channel of one device will not affect the coolant in the liquid cooling channel of another device. The liquid cooling device can independently dissipate heat for each device, thereby meeting the relevant requirements of the coolant of each device, improving the reliability of the liquid cooling device in dissipating heat for each device, and thus facilitating the normal operation of each of the at least two devices and the electric vehicle.

[0058] In combination with the second aspect, in a possible implementation, at least two devices include three devices, the liquid cooling channels of some of the at least three devices are connected in series, and the liquid cooling channels of other devices are not connected to each other, and the liquid cooling device includes multiple liquid inlet heads and multiple liquid outlet heads. One of the multiple liquid inlet heads is connected to the liquid inlet of the liquid cooling channel of one of the devices in the partial devices, and one of the multiple liquid outlet heads is connected to the liquid outlet of the liquid cooling channel of another device in the partial devices; each of the multiple liquid inlet heads except one is used to be connected one-to-one with the liquid outlet of the liquid cooling channel of each device in the other devices and the liquid outlet of the liquid cooling channel of the electric vehicle; each of the multiple liquid outlet heads except one is used to be connected one-to-one with the liquid inlet of the liquid cooling channel of each device in the other devices and the liquid inlet of the liquid cooling channel of the electric vehicle.

[0059] In the embodiment of the present application, the number of liquid outlet heads and liquid inlet heads of the liquid cooling device is relatively small. Accordingly, the number of connections between the liquid inlet head and the liquid cooling unit and the liquid storage tank is also reduced, and the number of connections between the liquid outlet head and the liquid storage tank is also reduced, which can simplify the design of the liquid cooling device. Moreover, under this design, since one liquid inlet head is connected to the liquid inlet of the liquid cooling channel of one device in the partial equipment, and one liquid outlet head is connected to the liquid outlet of the liquid cooling channel of another device in the partial equipment, it is equivalent to connecting the partial equipment in series, that is, the liquid return port of one device in the partial equipment is connected to the liquid injection port of another device. Therefore, the liquid cooling device can simultaneously dissipate heat from the partial equipment through one liquid outlet head and one liquid inlet head. That is, the circulating heat dissipation between the liquid cooling device and the partial equipment can be achieved through only one path, which is relatively simple and easy to implement.

[0060] In addition, the liquid cooling channels of the other devices in at least two devices are not connected, and the liquid filling ports of the other devices and electric vehicles are connected one-to-one with the liquid outlet heads of the liquid cooling devices, and the liquid return ports of the other devices and electric vehicles are connected one-to-one with the liquid inlet heads of the liquid cooling devices, thereby meeting the relevant requirements of the coolant of the other devices and electric vehicles, improving the reliability of the liquid cooling equipment in dissipating heat for the other devices and electric vehicles, and thus facilitating the normal operation of the other devices and electric vehicles.

[0061] Moreover, since electric vehicles may only have heat dissipation needs when charging, the liquid outlet and liquid inlet heads designed in this application for connecting electric vehicles are different from the liquid outlet and liquid inlet heads for connecting at least two devices. This can better meet the heat dissipation needs of electric vehicles, is conducive to the normal charging of electric vehicles, and can also facilitate users to connect electric vehicles and liquid cooling equipment, thereby improving user experience.

[0062] In conjunction with the second aspect, in one possible implementation, the liquid cooling channels of each of the at least two devices are connected in series, and the liquid cooling devices include two liquid inlet heads and two liquid outlet heads. One of the two liquid inlet heads is connected to the liquid outlet of the liquid cooling channel of one of the at least two devices, and one of the two liquid outlet heads is connected to the liquid inlet of the liquid cooling channel of another of the at least two devices; the other of the two liquid inlet heads is used to connect to the liquid outlet of the liquid cooling channel of the electric vehicle, and the other of the two liquid outlet heads is used to connect to the liquid inlet of the liquid cooling channel of the electric vehicle.

[0063] In the embodiments of the present application, the liquid cooling device has fewer liquid outlets and inlet heads. Accordingly, the number of connections between the liquid inlet head and the liquid cooling unit and the liquid storage tank is reduced, as is the number of connections between the liquid outlet head and the liquid storage tank, simplifying the design of the liquid cooling device. Furthermore, with this design, since one liquid inlet head is connected to the liquid inlet of the liquid cooling channel of one device in the partial equipment, and one liquid outlet head is connected to the liquid outlet of the liquid cooling channel of another device in the partial equipment, this is equivalent to connecting at least two devices in series. Thus, the liquid cooling device simultaneously dissipates heat from the at least two devices through one liquid outlet head and one liquid inlet head. That is, cyclic heat dissipation between the liquid cooling device and the at least two devices only requires a single path, resulting in a relatively simple design and ease of implementation.

[0064] In addition, the other liquid outlet of the liquid cooling device can be connected to the liquid filling port of the electric vehicle, and the other liquid inlet of the liquid cooling device can be connected to the liquid return port of the electric vehicle, thereby meeting the relevant requirements of the electric vehicle for coolant and improving the reliability of the liquid cooling device in dissipating heat for the electric vehicle. Moreover, since electric vehicles may only have heat dissipation requirements when charging, the liquid outlet and liquid inlet designed in this application are different from the liquid outlet and liquid inlet connected to at least two devices. This can better meet the heat dissipation requirements of the electric vehicle, facilitate the normal charging of the electric vehicle, and facilitate users to connect the electric vehicle and the liquid cooling device, thereby improving the user experience.

[0065] In conjunction with the second aspect, in one possible implementation, the liquid cooling device includes multiple liquid outlet heads and multiple liquid inlet heads. One of the multiple liquid outlet heads is configured to connect to a liquid inlet of a liquid cooling channel of an electric vehicle, and one of the multiple liquid inlet heads is configured to connect to a liquid return port of the liquid cooling channel of the electric vehicle. The liquid inlet of some or all of the at least two devices is connected to a liquid outlet head other than one of the multiple liquid outlet heads; alternatively, the liquid return port of some or all of the at least two devices is connected to a liquid inlet head other than one of the multiple liquid inlet heads.

[0066] In the embodiments of the present application, the number of liquid outlets and inlet heads of the liquid cooling device is relatively flexible. When the liquid inlet ports of some or all of the at least two devices are connected to the same liquid outlet head, the number of connections between the liquid outlet head and the liquid storage tank is correspondingly reduced. When the liquid return ports of some or all of the at least two devices are connected to the same liquid inlet head, the number of connections between the liquid inlet head and the liquid cooling unit and the liquid storage tank is also reduced, which can simplify the design of the liquid cooling device. Moreover, under this design, because the same liquid outlet head or the same liquid inlet head is connected to some or all of the at least two devices, the liquid cooling device can simultaneously dissipate heat for some or all of the at least two devices through the same liquid outlet head or the same liquid inlet head, resulting in low energy consumption, a relatively simple design, and ease of implementation.

[0067] In addition, the other liquid outlet of the liquid cooling device can be connected to the liquid filling port of the electric vehicle, and the other liquid inlet of the liquid cooling device can be connected to the liquid return port of the electric vehicle, thereby meeting the relevant requirements of the electric vehicle for coolant and improving the reliability of the liquid cooling device in dissipating heat for the electric vehicle. Moreover, since electric vehicles may only have heat dissipation requirements when charging, the liquid outlet and liquid inlet designed in this application are different from the liquid outlet and liquid inlet connected to at least two devices. This can better meet the heat dissipation requirements of the electric vehicle, facilitate the normal charging of the electric vehicle, and facilitate users to connect the electric vehicle and the liquid cooling device, thereby improving the user experience.

[0068] In combination with the second aspect, in one possible implementation, the charging device includes a charging module and a charging gun, the charging module is used to output electrical energy through the charging gun to charge the electric vehicle, and the liquid cooling device is used to dissipate heat for the charging module and the charging gun.

[0069] In an embodiment of the present application, the charging device includes a charging module and a charging gun, so that the liquid cooling device can dissipate heat from the charging module and the charging gun to meet the heat dissipation requirements of the charging module and the charging gun and ensure the normal operation of the charging device. BRIEF DESCRIPTION OF THE DRAWINGS

[0070] Figure 1 A schematic diagram of the structure of the new energy system provided in an embodiment of the present application.

[0071] Figures 2 to 9 Schematic diagram of the liquid cooling device provided in an embodiment of the present application.

[0072] Figure 10 and Figure 11 They are Figure 8 Corresponding cross-sectional views along the xz plane and yz plane.

[0073] Figure 12 and Figure 13 They are Figure 9 Corresponding cross-sectional views along the xz plane and yz plane.

[0074] Figure 14 Schematic diagram of the liquid cooling device provided in an embodiment of the present application.

[0075] Figure 15 and Figure 16 They are Figure 14 Corresponding cross-sectional views along the xz plane and yz plane.

[0076] Figures 17 to 24 Schematic diagram of the liquid cooling device provided in an embodiment of the present application.

[0077] Figures 25 to 29 A schematic diagram of a new energy system provided in an embodiment of the present application. DETAILED DESCRIPTION

[0078] The technical solution in this application will be described below with reference to the accompanying drawings.

[0079] In the description of the embodiments of the present application, unless otherwise specified, “ / ” means or, for example, A / B can mean A or B; “and / or” in this article is merely a way to describe the association relationship of associated objects, indicating that three relationships can exist, for example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone.

[0080] In the embodiments of the present application, prefixes such as "first" and "second" are used only to distinguish different description objects and have no limiting effect on the position, order, priority, quantity or content of the described objects. The use of prefixes such as ordinal numbers to distinguish description objects in the embodiments of the present application does not constitute a restriction on the described objects. For the statement of the described objects, please refer to the description in the context of the claims or embodiments, and the use of such prefixes should not constitute an unnecessary restriction. In addition, in the description of this embodiment, unless otherwise specified, the meaning of "plurality" is two or more.

[0081] With the development of new energy vehicle technology, many automobile manufacturers have gradually launched electric vehicles. Electric vehicles have become the choice of many users because of their energy saving and environmental protection as well as relatively mature technology.

[0082] This application can be applied to systems where power supply devices and loads charge each other through a power distribution matrix. In particular, for systems that include charging piles and electric vehicles, the charging piles can use power from the grid to charge the electric vehicles, and the electric vehicles can also output their own power back to the grid.

[0083] Figure 1 The structural diagram of the new energy system 10 provided in an embodiment of the present application is exemplarily shown.

[0084] Combine Figure 1 (a) and Figure 1 In (b), the new energy system 10 may include a charging device 11, which can be used to receive AC power output by the external power grid 20, and convert the AC power into stable DC power and then transmit it to the electric vehicle 12 to charge the electric vehicle 12.

[0085] In some embodiments, as Figure 1 As shown in (a) of FIG, the charging device 11 is a split-type charging pile. Specifically, the charging device 11 may include a charging host 111, at least one charging terminal 112, and at least one charging gun 113. The charging host 111 may be electrically connected to the at least one charging terminal 112, and the at least one charging terminal 112 may be electrically connected to the at least one charging gun 113 via a cable. In a specific implementation, one charging terminal 112 may be electrically connected to one or more charging guns 113.

[0086] The charging host 111 may include multiple power conversion devices that can convert AC power from the external power grid 20 into stable DC power and then transmit it to the charging terminal 112. The multiple power conversion devices may include, for example, an alternating current-direct current (AC-DC) converter and a direct current-direct current (DC-DC) converter. The charging terminal 112 transmits the stable DC power to the electric vehicle 12 via the charging gun 113 to charge the electric vehicle 12.

[0087] The charging terminal 112 may include a housing, a human-computer interaction interface, a charging control unit, a metering and billing unit, etc., and is used to perform information exchange, energy transmission, metering and billing, etc. with the electric vehicle 12.

[0088] The electric vehicle 12 may be a vehicle powered by electricity. The electric vehicle 12 may be a pure electric vehicle (pure EV / battery EV), a hybrid electric vehicle (HEV), a range-extended electric vehicle (REEV), or a plug-in hybrid electric vehicle (PHEV).

[0089] In other embodiments, Figure 1 As shown in (b) of the figure, the charging device 11 is an integrated charging station. Specifically, the charging device 11 can directly incorporate the human-machine interface, charging control unit, and metering and billing unit into the charging host 111. Thus, the charging device 11 may only include the charging host 111 and at least one charging gun 113 electrically connected to the charging host 111, without including the charging terminal 112. The multiple power conversion devices in the charging host 111 can convert AC power from the external power grid 20 into stable DC power, which is then directly delivered to the electric vehicle 12 via the charging gun 113.

[0090] In addition, the new energy system 10 also includes a photovoltaic device 13 and an energy storage device 14. The photovoltaic device 13 converts solar energy into direct current (DC) electricity through the photovoltaic effect. This DC electricity can be transmitted to the charging device 11 to charge the electric vehicle 12. The photovoltaic device 13 can also store the converted DC electricity in the energy storage device 14. When the power provided by the power grid 20 and the photovoltaic device 13 is insufficient, the energy storage device 14 can transmit the stored DC electricity to the charging device 11 to charge the electric vehicle 12.

[0091] When at least some of the devices in the new energy system 10 are in operation, these devices will generate heat. If this heat cannot be effectively discharged, it will affect the reliable operation of the new energy system. Therefore, it is necessary to dissipate heat from the devices in the new energy system 10.

[0092] like Figure 2 As shown, the present application provides a liquid cooling device, which is used to perform heat exchange with multiple external devices. The liquid cooling device includes a liquid cooling unit 210, a liquid inlet head 220, and a liquid outlet head 230. The liquid outlet head 230 is used to connect to the liquid injection port of the external device, and the liquid inlet head 220 is used to connect to the liquid return port of the external device. The multiple external devices include at least two devices among photovoltaic devices, energy storage devices, charging devices, and electric vehicles.

[0093] Refer to the above Figure 2 , Figure 2 Two liquid inlet heads 220 and two liquid outlet heads 230 are shown, namely, liquid inlet head 220a, liquid inlet head 220b, and liquid outlet head 230a, liquid outlet head 230b. Among them, the liquid inlet head 220a and the liquid outlet head 230a can be a group of liquid inlet and outlet heads, and the liquid inlet head 220b and the liquid outlet head 230b can be another group of liquid inlet and outlet heads. These two groups of liquid inlet and outlet heads are respectively connected to different devices in the external device. Specifically, taking the external device including a photovoltaic device and a charging device as an example, for example, the liquid outlet head 230a can be connected to the liquid injection port of the photovoltaic device, and the liquid inlet head 220a can be connected to the liquid return port of the photovoltaic device; the liquid outlet head 230b can be connected to the liquid injection port of the charging device, and the liquid inlet head 220b can be connected to the liquid return port of the charging device.

[0094] It should be understood that when the liquid cooling device includes three liquid inlet heads 220 and three liquid outlet heads 230, the liquid cooling device can be connected to three external devices. The specific connection method is similar to the above and will not be repeated here.

[0095] The liquid inlet 211 a of the liquid cooling unit 210 is connected to the liquid inlet head 220 , and the liquid outlet 211 b of the liquid cooling unit 210 is connected to the liquid outlet head 230 .

[0096] In the embodiment of the present application, taking the example of a photovoltaic device transmitting electrical energy to a charging device, when the liquid outlet 230a is connected to the liquid inlet of the photovoltaic device and the liquid inlet 220a is connected to the liquid return port of the photovoltaic device, and when the liquid outlet 230b is connected to the liquid inlet of the charging device and the liquid inlet 220b is connected to the liquid return port of the photovoltaic device, the liquid cooling device transmits coolant to the photovoltaic device through the liquid outlet 230a connected thereto. The coolant can absorb the heat generated by the photovoltaic device during the energy conversion process. Afterwards, the heat-absorbing coolant flows into the liquid cooling unit 210 through the liquid inlet 220a connected to the liquid return port of the photovoltaic device, thereby bringing the heat generated by the photovoltaic device during energy conversion to the cooling unit 210, thereby achieving heat dissipation for the photovoltaic device. The liquid cooling device transmits coolant to the charging device through the liquid outlet 230b connected thereto. The coolant can absorb the heat generated by the charging device during the power reception. Afterwards, the cooling liquid that absorbs heat flows into the liquid cooling unit 210 through the liquid inlet head 220b connected to the liquid return port of the charging device, thereby bringing the heat generated by the charging device during the power receiving process to the liquid cooling unit 210 to achieve heat dissipation for the charging device.

[0097] In an embodiment of the present application, the liquid cooling device delivers coolant to at least two devices among the photovoltaic device, the energy storage device and the charging device, and the electric vehicle through a liquid outlet head. The coolant can absorb heat from the at least two devices and the electric vehicle. The coolant after absorbing the heat flows into the liquid cooling unit 210 through the liquid inlet head, thereby bringing the heat generated by the at least two devices and the electric vehicle to the liquid cooling unit 210, realizing heat dissipation for the at least two devices and the electric vehicle, and improving the reliability of the system operation.

[0098] Furthermore, in the embodiments of the present application, the liquid cooling device can dissipate heat for multiple devices, which is equivalent to these multiple devices sharing a single liquid cooling device, thereby improving energy efficiency and thus improving utilization efficiency. Furthermore, in the embodiments of the present application, multiple devices sharing a single liquid cooling device can reduce purchase and maintenance costs, thereby achieving optimal costs.

[0099] The specific structure of the liquid cooling unit 210 is described below.

[0100] In one embodiment, the liquid cooling unit 210 includes a compressor, N first heat exchangers, N expansion valves and a second heat exchanger. The N first heat exchangers and the N expansion valves are connected one-to-one. Each expansion valve is connected to the corresponding first heat exchanger, compressor, and second heat exchanger in sequence. N is an integer greater than or equal to 2.

[0101] Among them, the first heat exchanger includes a first refrigerant passage and a first coolant passage, the first refrigerant passage is used to exchange heat with the first coolant passage, the second heat exchanger includes a second refrigerant passage, each first refrigerant passage is connected between the compressor and the corresponding expansion valve, the second refrigerant passage is connected between the compressor and N expansion valves, the liquid inlet of the first coolant passage is connected to the liquid inlet head, and the liquid outlet of the first coolant passage is connected to the liquid outlet head.

[0102] refer to Figure 3 , Figure 3 Taking two first heat exchangers and two expansion valves as an example, the liquid cooling unit 210 includes two first heat exchangers 2122, wherein the two first heat exchangers are first heat exchanger 2122a and first heat exchanger 2122b. The first coolant passage of the first heat exchanger 2122a is connected to the liquid inlet header 220b via the liquid inlet 211a2 of the liquid cooling unit 210, and the first coolant passage of the first heat exchanger 2122a is connected to the liquid outlet header 230b via the liquid outlet 211b2 of the liquid cooling unit 210; the first coolant passage of the first heat exchanger 2122b is connected to the liquid inlet header 220a via the liquid inlet 211a1 of the liquid cooling unit 210, and the first coolant passage of the first heat exchanger 2122b is connected to the liquid outlet header 230a via the liquid outlet 211b1 of the liquid cooling unit 210.

[0103] Liquid cooling unit 210 also includes a compressor 2121, a second heat exchanger 2124, and two expansion valves, expansion valve 2123a and expansion valve 2123b. Expansion valve 2123a, first heat exchanger 2122a, compressor 2121, and second heat exchanger 2124 form a first refrigerant path. Expansion valve 2123b, first heat exchanger 2122b, compressor 2121, and second heat exchanger 2124 form another first refrigerant path.

[0104] In the present application, the first refrigerant path can use a heat exchange liquid as a thermal management medium. The heat exchange liquid can include a refrigerant, a cryogen or a snow seed, and is a medium substance used to complete energy conversion in various heat engines. These substances usually increase power by reversible phase changes (such as gas-liquid phase changes). The heat exchange liquid is a working fluid used to transfer heat energy and produce a freezing effect. In other words, the heat exchange liquid can transfer heat through evaporation and condensation. The heat exchange liquid can be a substance that easily absorbs heat to become a gas and easily releases heat to become a liquid. For example, the heat exchange liquid is an intermediate substance in the refrigeration process. It first accepts the coldness of the refrigerant and cools down, and then cools other cooled substances.

[0105] In an embodiment of the present application, each expansion valve forms a refrigerant passage with the corresponding first heat exchanger, compressor, and second heat exchanger. Since each first heat exchanger includes a first coolant passage, and the liquid inlet of the first coolant passage is connected to the liquid inlet head, and the liquid outlet of the first coolant passage is connected to the liquid outlet head, the liquid cooling device can transport coolant to different external devices through the liquid outlets of different first coolant passages, and the coolant that absorbs heat flows into the liquid cooling unit through the liquid inlet of the correspondingly connected first coolant passage, thereby realizing heat dissipation of the external device.

[0106] For example, assuming that the liquid outlet 230a is connected to the liquid injection port of the photovoltaic device and the liquid inlet 220a is connected to the liquid return port of the photovoltaic device, the liquid cooling device dissipates heat for the photovoltaic device through the liquid outlet 230a and the liquid inlet 220a. Specifically, the first heat exchanger 2122b includes a first coolant passage, and the expansion valve 2123b, the first heat exchanger 2122b, the compressor 2121, and the second heat exchanger 2124 form a refrigerant passage. The coolant in the first coolant passage included in the first heat exchanger 2122b flows into the photovoltaic device through the liquid outlet 211b1, and the coolant that absorbs heat flows into the liquid inlet of the first coolant passage through the liquid injection port 211a1. The first heat exchanger 2122b can transfer the heat absorbed by the coolant in the first coolant passage to the heat exchange liquid in the first refrigerant passage through heat exchange, thereby cooling the coolant in the first coolant passage.

[0107] Assuming that outlet 230b is connected to the charging device's liquid inlet and inlet 220b is connected to the charging device's liquid return port, the liquid cooling device dissipates heat from the charging device via outlet 230b and inlet 220b. Specifically, first heat exchanger 2122a includes another first coolant passage. Expansion valve 2123a, first heat exchanger 2122a, compressor 2121, and second heat exchanger 2124 form another refrigerant passage. Coolant in the first coolant passage included in first heat exchanger 2122a flows into the charging device via outlet 211b2. The heat-absorbing coolant flows into the inlet of the other first coolant passage via inlet 211a2. First heat exchanger 2122a can transfer the heat absorbed by the coolant in the other first coolant passage to the heat exchange fluid in the other first refrigerant passage through heat exchange, thereby cooling the coolant in the other first coolant passage.

[0108] In the above process, when the liquid cooling device transports coolant to different external devices through different first coolant passages, since the liquid outlet of each first coolant passage is connected to a different liquid outlet head and the liquid inlet of each first coolant passage is connected to a different liquid inlet head, the coolants in the liquid cooling passages of different external devices can be made independent of each other, avoiding the mutual influence of the coolants in the liquid cooling passages of different devices, thereby better meeting the cooling liquid needs of different external devices and ensuring the normal operation of each external device.

[0109] In addition, the first heat exchanger includes a first refrigerant passage and a first coolant passage. The first refrigerant passage and the first coolant passage perform heat exchange. This heat dissipation method has a high heat dissipation efficiency, which is beneficial to further improve the heat dissipation effect of the coolant on external equipment to meet the growing heat dissipation needs of external equipment.

[0110] In one embodiment, the liquid cooling device includes N liquid outlet heads and N liquid inlet heads. The N liquid outlet heads are connected to the liquid outlets of the N first cooling liquid passages in a one-to-one correspondence, and the N liquid inlet heads are connected to the liquid inlets of the N first cooling liquid passages in a one-to-one correspondence.

[0111] Continue to refer to the above Figure 3 In the figure, two liquid inlet heads and two liquid outlet heads are taken as an example. It is assumed that the liquid outlet head 230a is connected to the liquid filling port of the photovoltaic device, and the liquid inlet head 220a is connected to the liquid return port of the photovoltaic device; the liquid outlet head 230b is connected to the liquid filling port of the charging device, and the liquid inlet head 220b is connected to the liquid return port of the charging device.

[0112] In a specific implementation, the liquid cooling device delivers cooling liquid to the photovoltaic device through the liquid outlet 230a. This cooling liquid can absorb the heat generated by the photovoltaic device during the energy conversion process. The heat-absorbing cooling liquid then flows into the liquid cooling unit 210 through the liquid inlet 220a connected to the return port of the photovoltaic device, thereby bringing the heat generated by the photovoltaic device during energy conversion to the liquid cooling unit 210, thereby dissipating heat from the photovoltaic device. Furthermore, the liquid cooling device delivers cooling liquid to the charging device through the liquid outlet 230b. This cooling liquid can absorb the heat generated by the charging device during the power reception process. The heat-absorbing cooling liquid then flows into the liquid cooling unit 210 through the liquid inlet 220b connected to the return port of the charging device, thereby bringing the heat generated by the charging device during the power reception process to the liquid cooling unit 210, thereby dissipating heat from the charging device.

[0113] Taking the example of a photovoltaic device transmitting electrical energy to a charging device, in a practical scenario, when the photovoltaic device transmits electrical energy to the charging device, the liquid cooling device delivers coolant to the photovoltaic device via the liquid outlet 230a. This coolant absorbs the heat generated by the photovoltaic device during the energy conversion process. The heat-absorbing coolant then flows into the first coolant passage through the return port of the photovoltaic device, the liquid inlet 220a, and the liquid inlet 211a1 of the liquid cooling unit 210. This transfers the heat generated by the photovoltaic device during the energy conversion process to the liquid cooling unit 210, thereby dissipating heat from the photovoltaic device. Furthermore, the first heat exchanger 2122b can transfer the heat absorbed by the coolant in the first coolant passage to the heat exchange fluid in the first refrigerant passage through heat exchange, thereby cooling the coolant in the first coolant passage. The cooled coolant in the first coolant passage then flows through the liquid outlet 211b1 of the liquid cooling unit 210, the liquid outlet 230a, and the inlet of the photovoltaic device, and then flows into the photovoltaic device, continuing to circulate and dissipate heat from the photovoltaic device. After heat exchange, the heat exchange liquid in the first refrigerant path can pass through the expansion valve 2123b, the second heat exchanger 2124, and the compressor 2121 to achieve a cooling cycle of the heat exchange liquid.

[0114] In the above embodiment, the flow direction of the coolant in the liquid cooling device and the photovoltaic device can be: liquid cooling device - liquid outlet head 230a - liquid filling port of the photovoltaic device - liquid return port of the photovoltaic device - liquid inlet head 220a - liquid inlet 211a1 of the liquid cooling unit 210 - liquid outlet 211b1 of the liquid cooling unit 210 - liquid outlet head 230a, thereby realizing heat dissipation of the photovoltaic device and achieving the purpose of cooling the photovoltaic device, thereby ensuring the normal storage of energy from the photovoltaic device to the charging device.

[0115] When the charging device transmits electrical energy to the charging device, the liquid cooling device delivers coolant to the charging device through the liquid outlet 230b. This coolant absorbs the heat generated by the charging device during the energy reception process. The heat-absorbing coolant then flows into the first coolant passage through the charging device's return port, the liquid inlet 220b, and the liquid inlet 211a2 of the liquid cooling unit 210. This transfers the heat generated by the charging device during the energy reception process to the liquid cooling unit 210, dissipating heat from the charging device. Furthermore, the first heat exchanger 2122a transfers the heat absorbed by the coolant in the first coolant passage through heat exchange with the heat exchange fluid in the first refrigerant passage, thereby cooling the coolant in the first coolant passage. The cooled coolant in the first coolant passage then flows through the liquid outlet 211b2 of the liquid cooling unit 210, the liquid outlet 230b, and the charging device's inlet, returning to the charging device, where it continues to circulate and dissipate heat from the charging device. After heat exchange, the heat exchange liquid in the first refrigerant path can pass through the expansion valve 2123a, the second heat exchanger 2124, and the compressor 2121 to achieve a cooling cycle of the heat exchange liquid.

[0116] In the above embodiment, the flow direction of the coolant in the liquid cooling device and the charging device can be: liquid cooling device - liquid outlet head 230b - liquid filling port of the charging device - liquid return port of the charging device - liquid inlet head 220b - liquid inlet 211a2 of the liquid cooling unit 210 - liquid outlet 211b2 of the liquid cooling unit 210 - liquid outlet head 230b, thereby realizing heat dissipation of the charging device and achieving the purpose of cooling the charging device, thereby ensuring the normal transmission of energy from the photovoltaic device to the charging device.

[0117] For ease of description, in the embodiment of the present application, the N liquid inlet heads and the N liquid outlet heads may be referred to as N groups of liquid inlet and outlet heads.

[0118] It should be understood that in some possible cases, only some of the N external devices may need heat dissipation. Since the N groups of inlet and outlet liquid heads are connected to the N external devices one-to-one, heat dissipation for different external devices can be achieved by controlling different groups of inlet and outlet liquid heads among the N groups of inlet and outlet liquid heads to deliver cooling liquid.

[0119] Specifically, assuming the liquid cooling system includes three sets of inlet and outlet liquid heads, each connected to a photovoltaic device, a charging device, and an energy storage device. In a scenario where the photovoltaic device is transmitting electricity to the charging device, the photovoltaic device and the charging device require heat dissipation, but the energy storage device does not. The liquid cooling system can simply deliver coolant to the photovoltaic device and the charging device, eliminating the need to deliver coolant to the energy storage device, to achieve heat dissipation for the photovoltaic device and the charging device. In other words, the liquid cooling system can control the delivery of coolant to different outlet and inlet liquid heads based on the needs of the external device, thereby achieving heat dissipation for the external device that requires heat dissipation.

[0120] In an embodiment of the present application, the liquid cooling device includes N liquid outlet heads and N liquid inlet heads. These N liquid outlet heads and N liquid inlet heads can be used to connect to external devices in a one-to-one correspondence. Thus, by controlling the different liquid outlet heads and liquid inlet heads to deliver coolant, heat can be dissipated to different external devices to meet the heat dissipation requirements of different external devices. In particular, in some scenarios, some external devices do not require heat dissipation. For example, in a scenario where a photovoltaic device delivers electricity to a charging device, the liquid cooling device only needs to dissipate heat for the photovoltaic device and the charging device, without dissipating heat for the energy storage device. This allows heat dissipation of external devices that require heat dissipation, improves the flexibility of heat dissipation for external devices, and further ensures the reliable operation of the external devices.

[0121] In one embodiment, the liquid cooling device further includes a liquid storage tank 240, which includes N chambers, the N chambers are not connected, and the liquid outlets of the N first cooling liquid passages are respectively connected to the N liquid outlet heads through the N chambers in a one-to-one correspondence.

[0122] Liquid storage tank 240 includes N first liquid outlets and N first liquid inlets. The N first liquid outlets are connected to the N chambers in a one-to-one correspondence, and the N first liquid inlets are connected to the N chambers in a one-to-one correspondence. The liquid outlets of the first coolant passages are connected to the corresponding first liquid inlets, and the first liquid outlets are connected to the corresponding liquid outlet heads.

[0123] refer to Figure 4 The figure shows two chambers 241 and 242, and chambers 241 and 242 are not connected. Moreover, the liquid outlet of the first coolant passage of the first heat exchanger 2122a is connected to the liquid outlet head 230b through chamber 241, and the liquid outlet of the first coolant passage of the first heat exchanger 2122b is connected to the liquid outlet head 230a through chamber 242.

[0124] The liquid storage tank 240 includes two first liquid outlets and two first liquid inlets. The two first liquid outlets are respectively the first liquid outlet 241b and the first liquid outlet 242b, and the two first liquid inlets are respectively the first liquid inlet 241a and the first liquid inlet 242a. The first liquid inlet 241a and the first liquid outlet 241b are in communication with the chamber 241, while the first liquid inlet 242a and the first liquid outlet 242b are in communication with the chamber 242. The liquid outlet of the first coolant passage of the first heat exchanger 2122a is connected to the first liquid inlet 241a, and the first liquid outlet 241b is connected to the liquid outlet head 230b. The liquid outlet of the first coolant passage of the first heat exchanger 2122b is connected to the first liquid inlet 242a, and the first liquid outlet 242b is connected to the liquid outlet head 230a.

[0125] As mentioned above Figure 4As shown, liquid storage tank 240 includes two disconnected chambers, preventing the coolant in these two chambers from flowing between them. Furthermore, first liquid inlet 241a and first liquid outlet 241b communicate with chamber 241, while first liquid inlet 242a and first liquid outlet 242b communicate with chamber 242. This design offers the advantage of allowing the liquid cooling system to deliver coolant with corresponding parameters based on the cooling requirements of different devices.

[0126] Specifically, assume that liquid outlet 230a is connected to the liquid inlet of the photovoltaic device, liquid inlet 220a is connected to the liquid return port of the photovoltaic device, and liquid outlet 230b is connected to the liquid inlet of the charging device, while liquid inlet 220b is connected to the liquid return port of the charging device. When the photovoltaic device transmits electrical energy to the charging device, assume that the temperature of the coolant required by the photovoltaic device is t1, the temperature of the coolant required by the charging device is t2, and t1>t2. Since the coolant temperatures required by the photovoltaic device and the charging device are different, and the two chambers of the liquid storage tank 240 are not connected, the temperature of the coolant in chamber 241 of the liquid storage tank 240 can be controlled to be t1, and the temperature of chamber 242 of the liquid storage tank 240 can be controlled to be t2. For example, the temperature of the coolant in these two chambers can be controlled to be different using an electric heater or other means. This allows the liquid cooling device to transmit coolant at temperature t1 to the photovoltaic device and coolant at temperature t2 to the charging device.

[0127] In order to ensure that the cooling liquid that absorbs heat can still meet the temperature requirements of the cooling liquid of the corresponding equipment after heat exchange with the liquid cooling unit 210, the temperature of the cooling liquid in the two chambers can be controlled by controlling the size of the valve opening of the expansion valve. Figure 4The temperature of the coolant of the charging device is related to the valve opening size of the expansion valve 2123a, and the temperature of the coolant of the photovoltaic device is related to the valve opening size of the expansion valve 2123b. Since t1>t2, that is, the temperature of the coolant required by the photovoltaic equipment is higher, and the temperature of the coolant required by the charging equipment is lower, therefore, the valve port of the expansion valve 2123b can be controlled to be smaller, and the valve port of the expansion valve 2123a can be controlled to be larger. In this way, the heat exchanged between the first refrigerant path in the first heat exchanger 2122a and the first coolant path of the first heat exchanger 2122a is less, and the heat exchanged between the first refrigerant path in the first heat exchanger 2122b and the first coolant path of the first heat exchanger 2122b is more, that is, the first refrigerant path of the first heat exchanger 2122a absorbs less heat, and the first refrigerant path of the first heat exchanger 2122b absorbs more heat, so that the temperature of the coolant flowing out of the liquid outlet 211b1 of the liquid cooling unit 210 is higher than the temperature of the coolant flowing out of the liquid outlet 211b2 of the liquid cooling unit 210. Therefore, the temperature of the coolant flowing into the liquid storage tank 240 through the first liquid inlet 242a is higher than the temperature of the coolant flowing into the liquid storage tank 240 through the first liquid inlet 241a. In this way, the temperature of the coolant delivered from the first liquid outlet 242b of the liquid storage tank 240 to the photovoltaic device through the liquid outlet head 230a is higher than the temperature of the coolant delivered from the first liquid outlet 241b of the liquid storage tank 240 to the charging device through the liquid outlet head 230b, thereby meeting the temperature requirements of the coolant delivered from the same liquid cooling device to different external devices, which is beneficial to the normal heat dissipation of the liquid cooling device to different external devices, and further beneficial to the normal operation of the external devices.

[0128] In the embodiment of the present application, the liquid storage tank includes N non-connected chambers, and the N first liquid outlets and N first liquid inlets of the liquid storage tank are all connected to the N chambers in a one-to-one correspondence. When the temperature of the coolant required by different external devices connected to the liquid cooling device is different, the temperature of the coolant in these N chambers can be controlled according to the temperature of the coolant required by the different external devices to meet the temperature requirements of the different external devices. In order to continuously meet the temperature requirements of different external devices, by controlling the size of the valve openings of the N expansion valves in the liquid cooling unit 210, the temperature of the coolant flowing from the different first liquid inlets into the corresponding chambers of the liquid storage tank 240 can be controlled, thereby continuously meeting the temperature requirements of the coolant delivered by the same liquid cooling device to different devices, which is conducive to the normal heat dissipation of the liquid cooling device to different external devices, and further conducive to the normal operation of the external devices.

[0129] In one embodiment, the liquid storage tank 240 further includes N second liquid outlets, the N second liquid outlets are connected to the N chambers in a one-to-one correspondence, and the N second liquid outlets are connected to the liquid inlets of the N first coolant passages in a one-to-one correspondence.

[0130] Continue to refer to the above Figure 4The figure shows two second liquid outlets, namely second liquid outlet 241c and second liquid outlet 242c. Second liquid outlet 241c is in communication with chamber 241, while second liquid outlet 242c is in communication with chamber 242. Furthermore, second liquid outlet 241c is connected to the liquid inlet of the first coolant passage of first heat exchanger 2122a, while second liquid outlet 242c is connected to the liquid inlet of the first coolant passage of first heat exchanger 2122b.

[0131] Generally, coolant with higher temperature flows upward and coolant with lower temperature flows downward. In the embodiment of the present application, the coolant in the chamber 241 flows into the liquid inlet 211a2 of the liquid cooling unit 210 through the second liquid outlet 241c. After heat exchange with the liquid cooling unit 210, the coolant flows out from the liquid outlet 211b2 of the liquid cooling unit 210 and flows into the chamber 241 of the liquid storage tank 240 through the first liquid inlet 241a, thereby realizing the cooling circulation of the coolant in the liquid cooling equipment and achieving the purpose of reducing the temperature of the coolant in the chamber 241 of the liquid storage tank 240.

[0132] In the above embodiment, the flow direction of the coolant in the liquid cooling device can be: liquid storage tank 240 - second liquid outlet 241c - liquid inlet 211a2 of the liquid cooling unit - liquid outlet 211b2 of the liquid cooling unit - first liquid inlet 241a - liquid storage tank 240, realizing the cooling circulation of the coolant in the liquid cooling device, achieving the purpose of lowering the temperature of the coolant in the chamber 241 of the liquid storage tank 240, thereby ensuring that the temperature of the coolant in the chamber 241 of the liquid storage tank 240 is maintained within a reasonable temperature range.

[0133] Similarly, the coolant in the chamber 242 flows into the liquid inlet 211a1 of the liquid cooling unit 210 through the second liquid outlet 242c. After heat exchange with the liquid cooling unit 210, the coolant flows out from the liquid outlet 211b1 of the liquid cooling unit 210 and flows into the chamber 242 of the liquid storage tank 240 through the first liquid inlet 242a, thereby realizing the cooling circulation of the coolant in the liquid cooling equipment and achieving the purpose of reducing the temperature of the coolant in the chamber 242 of the liquid storage tank 240.

[0134] In the above embodiment, the flow direction of the coolant in the liquid cooling device can be: liquid storage tank 240 - second liquid outlet 242c - liquid inlet 211a1 of the liquid cooling unit - liquid outlet 211b1 of the liquid cooling unit - first liquid inlet 242a - liquid storage tank 240, realizing the cooling circulation of the coolant in the liquid cooling device, achieving the purpose of reducing the temperature of the coolant in the chamber 242 of the liquid storage tank 240, thereby ensuring that the temperature of the coolant in the chamber 242 of the liquid storage tank 240 is maintained within a reasonable temperature range.

[0135] In the embodiment of the present application, since the N second liquid outlets of the liquid storage tank 240 are connected to the N chambers in a one-to-one correspondence, and the N second liquid outlets are connected to the liquid inlets of the N first cooling liquid passages in a one-to-one correspondence, therefore, when the temperature of the cooling liquid in any chamber in the liquid storage tank 240 is high, the cooling liquid in the chamber can be controlled to flow into the corresponding first cooling liquid passage through the corresponding second liquid outlet. The cooling liquid flowing into the first cooling liquid passage exchanges heat with the heat exchange liquid and flows out from the liquid outlet of the corresponding first cooling liquid passage, and flows into the corresponding chamber through the corresponding first liquid inlet, thereby realizing the cooling circulation of the cooling liquid in any chamber in the liquid storage tank, achieving the purpose of reducing the temperature of the cooling liquid in the liquid storage tank 240, thereby ensuring that the temperature of the cooling liquid in the liquid storage tank 240 is maintained within a reasonable temperature range, which is beneficial to the heat dissipation of the liquid cooling equipment to the external equipment.

[0136] In one embodiment, at least one of the N liquid inlet heads is connected to the corresponding liquid inlet of at least one first cooling liquid passage through the corresponding at least one first liquid inlet and the corresponding at least one second liquid outlet.

[0137] refer to Figure 5 The liquid storage tank 240 includes two first liquid inlets 241a and 242a, which are connected to the liquid outlets 211b2 and 211b1 of the liquid cooling unit, respectively. Furthermore, the liquid inlet head 220b is connected to the liquid inlet 211a2 of the first coolant passage of the first heat exchanger 2122a via the first liquid inlet 241a and the second liquid outlet 241c. This design has the advantage that the coolant flowing in from the return head 220b can directly enter the liquid storage tank 240 without having to pass through the liquid cooling unit 210 for heat dissipation before entering the liquid storage tank 240. This avoids the energy waste caused by the low-temperature coolant flowing in from the liquid inlet head 220b entering the liquid cooling unit 210. This is particularly advantageous for devices with low heat generation, such as charging guns.

[0138] Specifically, assuming that the coolant in chamber 241 of liquid reservoir 240 is used to dissipate heat from the charging gun of a charging device, and since the charging cable of the charging gun generates relatively little heat, the coolant flowing out of liquid outlet 230b absorbs relatively little heat. Therefore, the temperature of the coolant flowing in through liquid return 220b is relatively low. The coolant flowing in through liquid return 220b can be controlled to enter liquid reservoir 240 through first liquid inlet 241a, thereby transferring the relatively low heat generated by the charging gun into liquid reservoir 240. Since the charging gun generates relatively little heat during charging, even if the coolant that absorbs the heat from the charging gun flows into liquid reservoir 240, it will have minimal impact on the overall temperature of the coolant in liquid reservoir 240.

[0139] In the above embodiment, the coolant flows through the liquid cooling device and charging gun in the following order: liquid tank 240 - first liquid outlet 241b - liquid outlet head 230b - liquid filling port of the charging gun - liquid return port of the charging gun - liquid inlet head 220b - first liquid inlet 241a. This dissipates heat from the charging gun and achieves cooling.

[0140] If it is necessary to cool down the temperature of the coolant in the chamber 241 of the liquid storage tank 240, the liquid storage tank 240 outputs the coolant through the second liquid outlet 241c, and the coolant flows into the liquid cooling unit 210 through the liquid inlet 211a2 of the liquid cooling unit. The liquid cooling unit 210 can cool the coolant flowing out of the second liquid outlet 241a of the liquid storage tank 240 by heat exchange, and the cooled coolant flows into the liquid storage tank 240 through the liquid outlet 211b2 and the first liquid inlet 241a of the liquid cooling unit 210, thereby cooling down the coolant in the liquid storage tank 240, which is beneficial to the heat dissipation of the liquid cooling equipment to the external equipment, thereby facilitating the normal operation of the external equipment.

[0141] like Figure 6 As shown, in one embodiment, the liquid cooling unit 210 includes a compressor 2121, a first heat exchanger 2122a, an expansion valve 2123a and a second heat exchanger 2124 connected in sequence, the first heat exchanger 2122a includes a first refrigerant passage and a first coolant passage, the first refrigerant passage is used to exchange heat with the first coolant passage, the second heat exchanger 2124 includes a second refrigerant passage, the first refrigerant passage and the second refrigerant passage are both connected between the compressor 2121 and the expansion valve 2123a, the liquid inlet of the first coolant passage is connected to the liquid inlet head, and the liquid outlet of the first coolant passage is connected to the liquid outlet head.

[0142] In the embodiment of the present application, it is assumed that the liquid outlet 230a is connected to the liquid inlet of the photovoltaic device, the liquid inlet 220a is connected to the liquid return port of the photovoltaic device, the liquid outlet 230b is connected to the liquid inlet of the charging device, and the liquid inlet 220b is connected to the liquid return port of the charging device. When the photovoltaic device transmits electrical energy to the charging device, the liquid cooling device transmits coolant to the photovoltaic device through the liquid outlet 230a. This coolant can absorb the heat generated by the photovoltaic device during the energy conversion process. The heat-absorbing coolant then flows into the first coolant passage through the liquid inlet 220a connected to the liquid return port of the photovoltaic device, thereby bringing the heat generated by the photovoltaic device during the energy conversion process to the liquid cooling unit 210, thereby achieving heat dissipation for the photovoltaic device.

[0143] The liquid cooling device can also deliver coolant to the charging device via the liquid outlet 230b. This coolant absorbs heat generated by the charging device during power reception. The heat-absorbing coolant then flows into the first coolant passage through the liquid inlet 220b, connected to the liquid return port of the charging device. This heat is then transferred to the liquid cooling unit 210, dissipating heat from the charging device.

[0144] Furthermore, the first heat exchanger 2122a can transfer heat absorbed by the coolant in the first coolant passage to the heat exchange fluid in the first refrigerant passage through heat exchange, thereby cooling the coolant in the first coolant passage. The cooled coolant in the first coolant passage then flows through the liquid outlet 211b1 of the liquid cooling unit 210, the liquid outlet head 230a, and the inlet of the photovoltaic device, into the photovoltaic device, continuing to circulate and dissipate heat for the photovoltaic device. Alternatively, the cooled coolant in the first coolant passage then flows through the liquid outlet 211b1 of the liquid cooling unit 210, the liquid outlet head 230b, and the inlet of the charging device, into the charging device, continuing to circulate and dissipate heat for the charging device. After heat exchange, the heat exchange fluid in the first refrigerant passage can pass through the expansion valve 2123b, the second heat exchanger 2124, and the compressor 2121 to achieve a cooling cycle for the heat exchange fluid.

[0145] In an embodiment of the present application, the liquid cooling unit includes a compressor, a first heat exchanger, an expansion valve and a second heat exchanger. The first heat exchanger includes a first refrigerant passage and a first coolant passage. The first refrigerant passage and the first coolant passage perform heat exchange. The liquid cooling unit can use liquid-liquid heat exchange to dissipate heat from the coolant flowing in from the external device. The liquid cooling unit has a high efficiency in dissipating heat to the coolant, which is conducive to further improving the heat dissipation effect of the coolant on the external device to meet the growing heat dissipation needs of the external device.

[0146] In one embodiment, Figure 7 As shown, the liquid cooling device also includes a liquid storage tank 240, which includes a box body 243 and at least one partition plate 244 (one partition plate is shown in the figure), and the at least one partition plate 244 is used to separate the box body 243 into an upper chamber and a lower chamber, and the upper chamber and the lower chamber are connected.

[0147] The housing 243 is provided with a first liquid inlet 241a and a first liquid outlet 241b. Both the first liquid inlet 241a and the first liquid outlet 241b are located in the housing corresponding to the lower chamber. The first liquid inlet 241a is connected to the outlet of the first coolant passage, and the first liquid outlet 241b is connected to the liquid inlet of the first coolant passage. The housing 243 is also provided with a second liquid outlet 241c. The second liquid outlet 241c is located in the housing corresponding to the upper chamber and is connected to the liquid inlet of the first coolant passage.

[0148] In the embodiment of the present application, since the first liquid outlet 241b is located in the box corresponding to the lower chamber, the first liquid outlet 241b is connected to the liquid outlet head 230 (including the liquid outlet head 230a and the liquid outlet head 230b), and the liquid inlet 211a1 of the liquid cooling unit 210 is connected to the liquid inlet head 220 (including the liquid inlet head 220a and the liquid inlet head 220b).

[0149] In general, since the coolant with higher temperature flows upward and the coolant with lower temperature flows downward, the temperature of the coolant in the upper chamber is higher than that of the coolant in the lower chamber. Since the first liquid outlet 241b is located in the box corresponding to the lower chamber, the temperature of the coolant flowing out of the first liquid outlet 241b is relatively low. In actual scenarios, when the charging device charges the electric vehicle at high power, the first liquid outlet 241b delivers coolant to the charging device through the liquid outlet head 230b connected thereto. The coolant can absorb the heat generated by the charging device during the charging process. Afterwards, the coolant that absorbs the heat flows into the liquid cooling unit 210 through the liquid inlet head 220b connected to the liquid return port of the charging device, thereby bringing the heat generated by the charging device during the charging process to the liquid cooling unit 210, thereby achieving heat dissipation for the charging device.

[0150] Furthermore, the liquid cooling unit 210 can cool the coolant flowing out of the charging device through heat exchange. The cooled coolant then flows into the liquid storage tank 240 through the liquid outlet 211b1 and the first liquid inlet 241a of the liquid cooling unit 210, so that the coolant in the liquid storage tank 240 circulates and dissipates heat from the charging device. The specific implementation of the liquid cooling unit 210 dissipating heat from the coolant flowing out of the charging device through heat exchange will be described in detail below and will not be elaborated on here.

[0151] In addition, a second liquid outlet 241c is provided on the box body, and the second liquid outlet 241c is located in the box body corresponding to the upper chamber. The coolant in the upper chamber flows into the liquid inlet 211a1 of the liquid cooling unit 210 through the second liquid outlet 241c. After the coolant exchanges heat with the liquid cooling unit 210, it flows out from the liquid outlet 211b1 of the liquid cooling unit 210 and flows into the liquid storage tank 240 through the first liquid inlet 241a, thereby realizing the cooling circulation of the coolant in the liquid cooling equipment and achieving the purpose of reducing the temperature of the coolant in the liquid storage tank 240.

[0152] In the above embodiment, the flow direction of the coolant in the liquid cooling device can be: liquid storage tank 240 - second liquid outlet 241c - liquid inlet 211a1 of the liquid cooling unit - liquid outlet 211b1 of the liquid cooling unit - first liquid inlet 241a - liquid storage tank 240, realizing the cooling circulation of the coolant in the liquid cooling device, achieving the purpose of lowering the temperature of the coolant in the liquid storage tank 240, thereby ensuring that the temperature of the coolant in the liquid storage tank 240 is maintained within a reasonable temperature range.

[0153] The embodiment of the present application is designed with a partition plate that separates the box body into an upper chamber and a lower chamber. Generally, since higher-temperature coolant flows upward and lower-temperature coolant flows downward, the temperature of the coolant in the upper chamber of box body 243 is higher, while the temperature of the coolant in the lower chamber is lower. This is equivalent to isolating the coolants of different temperatures in box body 243. Furthermore, because the first liquid outlet is located in the box body corresponding to the lower chamber, when the liquid cooling device delivers coolant to the external device, the temperature of the coolant delivered to the external device through the first liquid outlet is lower, which can further improve the efficiency of liquid cooling and heat dissipation of the external device, thereby improving the heat dissipation effect of the liquid cooling device on the external device.

[0154] In addition, the liquid storage tank further includes a second liquid outlet 241c. The coolant flowing out of the second liquid outlet 241c exchanges heat with the liquid cooling unit 210, then flows out of the liquid outlet of the liquid cooling unit 210 and into the liquid storage tank 240 through the first liquid inlet 241a. This allows for a cooling cycle of the coolant within the liquid cooling device, thereby reducing the temperature of the coolant in the liquid storage tank 240. In particular, because the second liquid outlet 241c is located in the housing corresponding to the upper chamber, the coolant flowing out of the second liquid outlet 241c is at a higher temperature, thereby improving the heat exchange efficiency of the coolant and enhancing the heat dissipation effect.

[0155] As mentioned above, at least one partition plate divides the box body 243 into two chambers. The at least one partition plate may include one or more, which will be described below in different situations.

[0156] Case 1:

[0157] In one embodiment, the box body 243 includes a top plate, a bottom plate and a plurality of side plates. The top plate and the bottom plate are arranged opposite to each other, and the plurality of side plates are located between the top plate and the bottom plate.

[0158] The at least one partition plate includes a partition plate 244 , which is disposed between the top plate and the bottom plate. A gap is formed between the partition plate 244 and at least one side plate.

[0159] refer to Figure 8, it can be seen that the box body 243 includes a top plate 2401, a bottom plate 2402, four side plates 2403a, 2403b, 2403c, and 2403d, wherein a partition plate 244 is spaced apart from one of the side plates 2403d. Figure 9 , one of the partition plates is spaced apart from the two side plates 2403b and 2403d.

[0160] Refer to the above Figure 8 Taking the partition plate 244 shown in the figure as an example, it can be seen that the partition plate 244 is connected to both side plates 2403a and 2403c of the box body 243, and the partition plate 244 is connected to one side plate 2403b of the box body 243 and is spaced apart from the other side plate 2403d. In other words, Figure 8 In the embodiment, the partition plate 244 is spaced apart from a side plate 2403d of the box body 243. Figure 9 In the schematic diagram shown, the partition plate 244 is connected to both side plates 2403a and 2403c of the box body 243, and there is a gap between the partition plate 244 and both side plates 2403b and 2403d of the box body 243. In other words, Figure 9 In the embodiment, the partition plate 244 is spaced apart from two side plates 2403b and 2403d of the box body 243.

[0161] Figure 10 and Figure 11 They are Figure 8 Corresponding cross-sectional views along the xz plane and yz plane. Figure 10 It can be clearly seen that there is a gap between the partition plate 244 and one of the side plates of the box body 243 along the x direction. Figure 11 It can be clearly seen that the partition plate 244 is connected to two side plates of the box body 243 along the y direction. Figure 10 and Figure 11 The partition plate 244 is spaced apart from one of the side plates of the box body 243 , so that the coolant in the lower chamber can flow into the upper chamber through the space.

[0162] Figure 12 and Figure 13 They are Figure 9 Corresponding cross-sectional views along the xz plane and yz plane. Figure 12 It can be clearly seen that there is a gap between the partition plate 244 and the two side plates of the box body 243 along the x direction. Figure 13 It can be clearly seen that the partition plate 244 is connected to both side plates of the box body 243 along the y direction. Figure 12 and Figure 13 There is a gap between the partition plate 244 and the two oppositely arranged side plates of the box body 243, so that the coolant in the lower chamber can flow into the upper chamber through the two gaps.

[0163] above Figures 8 to 13 In the embodiment, the partition plate 244 is spaced from one or more side plates of the box body 243 , that is, the partition plate is connected to at least one side plate of the box body 243 , and the connection can be achieved by clamping or welding.

[0164] It should be understood that the above Figures 8 to 13 It is shown that the partition plate is spaced apart from one or more side panels of the box body 243. In some possible implementations, the partition plate 244 is spaced apart from each side panel of the box body 243, that is, the partition plate 244 is not connected to each side panel of the box body 243. In this case, the partition plate can be fixedly connected to the upper surface or lower surface of the box body to achieve a space between the partition plate 244 and each side panel of the box body 243.

[0165] In an embodiment of the present application, when the liquid storage tank 240 includes a partition plate 244, a partition plate 244 is arranged between the top plate and the bottom plate, and there is a gap between the partition plate 244 and at least one side plate, and the gap can connect the two chambers, so that the coolant in the lower chamber flows into the upper chamber through the gap, and the coolant in the upper chamber flows out through the second liquid outlet 241c, and flows into the lower chamber from the first liquid inlet 241a after passing through the liquid cooling unit 210. During this process, the liquid cooling unit 210 can take away the heat of the coolant flowing out of the second liquid outlet 241c, and the cooled coolant returns to the liquid storage tank 240 through the first liquid inlet 241a, thereby realizing the cooling circulation of the coolant in the liquid cooling equipment, ensuring that the temperature of the coolant in the box is maintained within a reasonable temperature range, which is conducive to liquid cooling and heat dissipation of electric vehicles.

[0166] Case 2:

[0167] In one embodiment, at least one partition plate includes a plurality of partition plates, the plurality of partition plates are arranged between the top plate and the bottom plate, and the plurality of partition plates are arranged in an interval along a first direction, and the first direction is perpendicular to the direction from the top plate to the bottom plate.

[0168] refer to Figure 14 As can be seen, box body 243 includes a top plate 2401, a bottom plate 2402, and four side plates 2403a, 2403b, 2403c, and 2403d. The figure uses three partition plates as an example: partition plate 244a, partition plate 244b, and partition plate 244c. These three partition plates are spaced apart and arranged along a first direction perpendicular to the direction from the top plate to the bottom plate, i.e., the first direction is the x-direction shown in the figure.

[0169] exist Figure 14In the schematic diagram shown, the plurality of partition plates 244 are spaced apart from the two side plates 2403 b and 2403 d of the box body 243 , and the plurality of partition plates 244 are connected to the two side plates 2403 a and 2403 c of the box body 243 .

[0170] Figure 15 and Figure 16 They are Figure 14 Corresponding cross-sectional views along the xz plane and yz plane. Figure 15 It can be clearly seen that the partition plates 244a, 244b and 244c are arranged at intervals along the x direction, so that there is a gap between the partition plate 244 and the side plate of the box body 243 along the x direction. Figure 16 It can be clearly seen that the partition plate 244 is connected to the side plates of the box body 243 along the y direction. Figure 15 and Figure 16 The multiple partition plates 244 are spaced apart from the side plates of the box body 243 , so that the coolant in the lower chamber can flow into the upper chamber through the multiple spacers.

[0171] In an embodiment of the present application, when the liquid storage tank 240 includes multiple partition plates, the multiple partition plates are arranged between the top plate and the bottom plate, and the multiple partition plates are arranged at intervals along the first direction, so that the cooling liquid in the lower chamber flows into the upper chamber through the multiple intervals, and the cooling liquid in the upper chamber flows out through the second liquid outlet 241c, and flows into the lower chamber from the first liquid inlet 241a after passing through the liquid cooling unit 210. During this process, the liquid cooling unit 210 can take away the heat of the coolant flowing out of the second liquid outlet 241c, and the cooled coolant returns to the liquid storage tank 240 through the first liquid inlet 241a, thereby realizing the cooling circulation of the coolant in the liquid cooling equipment, ensuring that the temperature of the coolant in the box body 243 is maintained within a reasonable temperature range, which is conducive to liquid cooling and heat dissipation of the electric vehicle.

[0172] Moreover, since the embodiment of the present application is designed to arrange multiple partition plates at intervals along the first direction, the flow rate of the coolant from the lower chamber to the upper chamber can be accelerated, thereby accelerating the cooling rate of the coolant in the box 243, which is further beneficial to the liquid cooling of the electric vehicle.

[0173] It should be noted that when at least one partition plate includes multiple partition plates, these multiple partition plates may not be located in the same plane. These multiple partition plates are arranged at intervals, so that the coolant in the lower chamber can flow into the upper chamber through multiple intervals, and the liquid cooling equipment can still achieve liquid cooling and heat dissipation for electric vehicles.

[0174] It should also be noted that when there is a gap between the partition plate and one of the side plates, as mentioned above Figure 10As shown, the second liquid outlet 241c of the present application is located on a side plate opposite to one of the side plates, which can improve the heat exchange efficiency. This is because the temperature of the coolant at the side plate opposite to one of the side plates is higher than the temperature of the coolant at the interval. In this way, the coolant with a higher temperature in the box body 243 can flow out from the second liquid outlet 241c first, thereby improving the heat exchange efficiency of the coolant and further improving the heat dissipation effect of the cooling cycle. In addition, the distance between the second liquid outlet 241c and the top plate can be designed to be smaller than the distance between the second liquid outlet 241c and the bottom plate. Since the coolant with a higher temperature is in the upper chamber and the coolant with a lower temperature is in the lower chamber, this design allows the coolant with a higher temperature in the box to exchange heat with the liquid cooling unit, which can further improve the heat exchange efficiency of the coolant, thereby ensuring that the cooling cycle of the coolant is carried out normally, improving the heat dissipation effect of the cooling cycle of the coolant, and facilitating the heat dissipation of the liquid cooling device to the external device.

[0175] When there are multiple spaces between the partition plate and the side plate, as mentioned above Figure 12 or Figure 15 As shown, the second liquid outlet 241c is located on the top plate. The advantage of this design is that it can improve the heat exchange efficiency. This is because, under this design, the coolant in the lower chamber can flow into the upper chamber through multiple intervals, and the temperature of the coolant located at the top plate is higher than the temperature of the coolant at the intervals. In this way, the coolant with a higher temperature in the box can flow out from the second liquid outlet first, thereby improving the heat exchange efficiency of the coolant and further improving the heat dissipation effect of the cooling cycle. If the second liquid outlet 241c is designed on one of the at least one side panels, the coolant with a lower temperature in the box will flow out from the second liquid outlet first, resulting in a lower heat exchange efficiency of the coolant, which is not conducive to the overall cooling and cooling of the coolant in the box. Therefore, the design of the present application can improve the heat exchange efficiency of the coolant, thereby improving the heat dissipation effect of the cooling cycle, which is beneficial to the cooling and cooling of the coolant, and improving the heat dissipation effect of the cooling cycle of the coolant, thereby facilitating the heat dissipation of the liquid cooling device to the external equipment.

[0176] refer to Figure 17 In one embodiment, the liquid cooling unit 210 further includes a fan 2125, the air outlet of the fan 2125 facing the second heat exchanger 2124. In this way, the fan 2125 can accelerate the flow rate of the air flowing through the second heat exchanger 2124 to achieve cooling of the second heat exchanger 2124.

[0177] In actual scenarios, the various components in the liquid cooling equipment are Figure 17 The schematic diagram shown is set up with Figure 7 compared to, Figure 17The second heat exchanger 2124 shown in the figure is arranged above the liquid storage tank, and the fan 2125 is arranged above the second heat exchanger 2124. The advantage of this design is that it is easy to form an air duct, which is conducive to heat dissipation to the external environment, thereby facilitating the heat dissipation effect of the liquid cooling device on the electric vehicle.

[0178] In the above embodiments, the liquid cooling device cools the coolant in a mechanical cooling mode. In some embodiments, the liquid cooling device can switch between a mechanical cooling mode and a natural heat dissipation mode.

[0179] In one embodiment, Figure 18 As shown, the liquid cooling unit 210 also includes a third heat exchanger 2126 and a fan 2125. The air outlet of the fan 2125 is directed toward the third heat exchanger 2126 and the second heat exchanger 2124. The liquid inlet of the third heat exchanger 2126 is connected to the liquid inlet head 220a or the second liquid outlet (only the liquid inlet of the third heat exchanger 2126 is shown to be connected to the liquid inlet head 220a), and the liquid outlet of the third heat exchanger 2126 is connected to the liquid outlet head.

[0180] In this embodiment of the present application, a third heat exchanger 2126 and a fan 2125 are added. The air outlet of the fan 2125 is directed toward the third heat exchanger 2126 and the second heat exchanger 2124. The fan 2125 can accelerate the flow rate of the coolant flowing through the third heat exchanger 2126, thereby cooling the coolant in the third heat exchanger 2126, and accelerate the flow rate of the coolant flowing through the second heat exchanger 2124, thereby cooling the coolant in the second heat exchanger 2124. Furthermore, this design allows switching between natural heat dissipation mode and mechanical cooling mode.

[0181] Specifically, when the outdoor ambient temperature is low, the coolant can be cooled using natural heat dissipation mode. For example, when a liquid cooling device dissipates heat to a charging device, the coolant in the liquid storage tank is delivered to the charging device via the first liquid outlet 241b and the liquid outlet header 230a. This coolant absorbs the heat generated by the charging device during charging. The heat-absorbing coolant then flows into the third heat exchanger 2126 via the liquid inlet header 220a, which is connected to the liquid return port of the charging device. Due to the low outdoor ambient temperature, the fan 2125 cools the coolant flowing into the third heat exchanger 2126. The coolant, having been cooled by the fan, then flows into the liquid storage tank via the first liquid inlet 241a, thereby dissipating heat for the charging device. In this mode, the compressor is not activated, and the compressor, first heat exchanger, and second heat exchanger are in an inactive state, which reduces power consumption and improves heat dissipation efficiency.

[0182] When the outdoor ambient temperature is high, the coolant can be cooled using a mechanical refrigeration mode. Continuing with the example of a liquid cooling device dissipating heat to a charging device, the coolant in the liquid storage tank is delivered to the charging device via the first liquid outlet 241b and the liquid outlet head 230a. This coolant can absorb the heat generated by the charging device during the charging process. The heat-absorbing coolant then flows into the first heat exchanger 2122a via the liquid inlet head 220a, which is connected to the liquid return port of the charging device. The first heat exchanger 2122a transfers the heat absorbed by the coolant in the first coolant path to the heat exchange liquid in the first refrigerant path through heat exchange, thereby cooling the coolant in the first coolant path. The cooled coolant in the first coolant path then flows through the liquid outlet 211b1 of the liquid cooling unit, the first liquid inlet 241a, the first liquid outlet 241b, and the charging device's liquid inlet, and flows into the charging device, continuing to circulate and dissipate heat for the charging device. After heat exchange, the heat exchange fluid in the first refrigerant path is transferred to the second heat exchanger 2124. The fan 2125 cools the heat exchange fluid flowing into the second heat exchanger 2124, thereby cooling the heat exchange fluid in the second heat exchanger 2124. In this mode, the outdoor temperature requirement is relatively low, and even in high ambient temperatures, heat dissipation for the charging device can be achieved, resulting in higher reliability.

[0183] In addition, in the mechanical refrigeration mode, the coolant that absorbs heat flows into the liquid inlet head and dissipates heat once before flowing into the liquid storage tank. In the process of cooling the coolant that absorbs heat, there is less loss and the heat dissipation efficiency is higher.

[0184] In one embodiment, Figure 19 As shown, the second heat exchanger 2124 also includes a second coolant passage, and the second refrigerant passage is used to exchange heat with the second coolant passage. The liquid cooling unit 210 also includes a third heat exchanger 2126, a fan 2125, and two three-way valves 21217a and 2127b. The air outlet of the fan 2125 is directed toward the third heat exchanger 2126. The liquid outlet of the third heat exchanger 2126 is connected to the liquid inlet of the second coolant passage, and the liquid inlet of the third heat exchanger 2126 is connected to the liquid outlet of the second coolant passage.

[0185] The first valve port of one of the three-way valves 2127a is connected to the liquid inlet of the first coolant passage, the second valve port of one of the three-way valves 2127a is connected to the liquid inlet of the third heat exchanger 2126, and the third valve port of one of the three-way valves 2127a is connected to the liquid inlet head 220a; the first valve port of another three-way valve 2127b is connected to the liquid outlet of the third heat exchanger 2126, the second valve port of another three-way valve 2127b is connected to the liquid inlet of the second coolant passage, and the third valve port of another three-way valve 2127b is connected to the liquid outlet head 230a.

[0186] In this embodiment of the present application, the air outlet of the fan 2125 is directed toward the third heat exchanger 2126. The fan 2125 can accelerate the flow rate of the coolant flowing through the third heat exchanger 2126, thereby cooling the coolant in the third heat exchanger 2126. In addition, with this design, switching between natural heat dissipation mode and mechanical cooling mode can be achieved.

[0187] Specifically, when the outdoor ambient temperature is low, the coolant can be cooled using natural heat dissipation mode. In this mode, the liquid cooling device controls the connection between the second and third ports of three-way valve 2127a, and the connection between the first and third ports of three-way valve 2127b. For example, when the liquid cooling device dissipates heat to a charging device, the coolant in the liquid storage tank is delivered to the charging device via the first liquid outlet 241b and the liquid outlet header 230a. This coolant absorbs the heat generated by the charging device. The heat-absorbing coolant then flows into the third heat exchanger 2126 via the liquid inlet header 220a, which is connected to the liquid return port of the charging device. Due to the low outdoor ambient temperature, the fan 2125 cools the coolant flowing into the third heat exchanger 2126, dissipating the heat. The coolant, which has been cooled by the fan, then flows into the liquid storage tank via the first liquid inlet 241a, thereby dissipating heat to the charging device. In this mode, the compressor is not activated, and the compressor, first heat exchanger, and second heat exchanger are in operation, reducing power consumption and improving heat dissipation efficiency.

[0188] When the outdoor ambient temperature is high, the coolant can be cooled by mechanical refrigeration mode. In this mode, the liquid cooling device controls the first valve port of the three-way valve 2127a to be connected to the third valve port, and the first valve port of the three-way valve 2127b to be connected to the second valve port. Still taking the example of the liquid cooling device dissipating heat to the charging device, the coolant in the liquid storage tank is transported to the charging device through the first liquid outlet 241b and the liquid outlet head 230a. The coolant can absorb the heat generated by the charging device. Afterwards, the coolant that absorbs the heat flows into the first heat exchanger 2122a through the liquid inlet head 220a connected to the liquid return port of the charging device. The first heat exchanger 2122a can transfer the heat absorbed by the coolant in the first coolant path to the heat exchange liquid in the first refrigerant path through heat exchange, thereby cooling the coolant in the first coolant path. The cooled coolant then flows through the liquid outlet 211b1, first liquid inlet 241a, first liquid outlet 241b of the liquid cooling unit 210, and the charging device's liquid inlet, continuing to circulate and dissipate heat for the charging device. After heat exchange, the heat exchange liquid in the first refrigerant path is transferred to the second coolant path of the second heat exchanger through heat exchange. The coolant in the second coolant path flows into the third heat exchanger 2126, and the fan 2125 cools the coolant flowing into the third heat exchanger 2126, thereby cooling the coolant in the third heat exchanger 2126. In this mode, the outdoor ambient temperature requirement is relatively low, and even in high ambient temperatures, heat dissipation for the charging device can be achieved, resulting in higher reliability.

[0189] In addition, a pump 270 may be provided between the second heat exchanger 2124 and the third heat exchanger 2126 to drive the flow of the second coolant between the second heat exchanger 2124 and the third heat exchanger 2126 to achieve a cooling cycle of the second coolant.

[0190] The embodiment of the present application adds a third heat exchanger and a fan, and the liquid cooling device can achieve heat dissipation of the coolant in different modes. When the liquid cooling device achieves heat dissipation of the coolant in the natural heat dissipation mode, there is no need to start the compressor, which can reduce power consumption and improve heat dissipation efficiency. When the liquid cooling device achieves heat dissipation of the coolant in the mechanical refrigeration mode, the temperature requirement for the outdoor environment is low. Even if the temperature environment is high, the coolant can still be dissipated, and the reliability is high. The present application can flexibly switch the coolant heat dissipation mode according to the temperature of the outdoor environment, which can not only achieve heat dissipation of the coolant, but also reduce power consumption, improve heat dissipation efficiency, and improve reliability.

[0191] Moreover, based on this design, the second coolant passage can be shared in the two heat dissipation modes, which is beneficial to the integration of the liquid cooling equipment and further to the miniaturized design of the liquid cooling equipment.

[0192] Furthermore, with this design, the fan outlet faces only the third heat exchanger, reducing wind resistance and improving heat dissipation. Furthermore, in mechanical cooling mode, the heat-absorbing coolant flows through the inlet header, undergoes two heat exchanges, and then flows into the storage tank. Therefore, this design reduces the heat dissipation requirements of multiple heat exchangers, thereby reducing costs.

[0193] In one embodiment, the second heat exchanger further includes a second coolant passage, and the second refrigerant passage is used for performing heat exchange with the second coolant passage.

[0194] The liquid cooling unit also includes a third heat exchanger, a fan, and 2N three-way valves. The fan's air outlet faces the third heat exchanger. The outlet of the third heat exchanger is connected to the inlet of the second coolant passage, and the inlet of the third heat exchanger is connected to the outlet of the second coolant passage. The N three-way valves are connected to the N first heat exchangers in a one-to-one correspondence, and the remaining N three-way valves are all connected to the third heat exchanger.

[0195] The first valve port of each of the N three-way valves is connected to the liquid inlet of the corresponding first coolant passage, the second valve port of each of the N three-way valves is connected to the liquid inlet of the third heat exchanger, and the third valve port of each of the N three-way valves is connected to the liquid inlet head; the first valve port of each of the other N three-way valves is connected to the liquid outlet of the third heat exchanger, the second valve port of each of the other N three-way valves is connected to the liquid inlet of the second coolant passage, and the third valve port of each of the other N three-way valves is connected to the liquid outlet head.

[0196] refer to Figure 20 In the figure, four three-way valves are taken as an example, among which the first valve port of the three-way valve 2127a1 is connected to the liquid inlet of the first coolant passage of the first heat exchanger 2122a, the second valve port of the three-way valve 2127a1 is connected to the liquid inlet of the third heat exchanger 2126, and the third valve port of the three-way valve 2127a1 is connected to the liquid inlet head 220a; the first valve port of another three-way valve 2127b1 is connected to the liquid outlet of the third heat exchanger 2126, the second valve port of another three-way valve 2127b1 is connected to the liquid inlet of the second coolant passage, and the third valve port of another three-way valve 2127b1 is connected to the liquid outlet head 230a through the liquid storage tank 240.

[0197] The first valve port of the three-way valve 2127a2 is connected to the liquid inlet of the first coolant passage of the first heat exchanger 2122b, the second valve port of the three-way valve 2127a2 is connected to the liquid inlet of the third heat exchanger 2126, and the third valve port of the three-way valve 2127a2 is connected to the liquid inlet head 220b; the first valve port of another three-way valve 2127b2 is connected to the liquid outlet of the third heat exchanger 2126, the second valve port of another three-way valve 2127b2 is connected to the liquid inlet of the second coolant passage, and the third valve port of another three-way valve 2127b2 is connected to the liquid outlet head 230b through the liquid storage tank 240.

[0198] exist Figure 20 In the schematic diagram shown, by controlling different valve ports of the three-way valve to conduct different paths, the switching between the natural heat dissipation mode and the mechanical cooling mode of the liquid cooling equipment can be achieved. The specific process and effect are the same as above. Figure 19 For the sake of brevity, I will not elaborate on it.

[0199] It should be understood that in the above Figure 20 In the schematic diagram shown, the liquid cooling device can also dissipate heat for different external devices simultaneously in two modes. For example, assuming that the liquid outlet 230a and the liquid inlet 220a are connected to a photovoltaic device, and the liquid outlet 230b and the liquid inlet 220b are connected to a charging device, the coolant flowing into the photovoltaic device from the liquid inlet 220a connected to the liquid return port of the photovoltaic device can flow directly into the liquid inlet of the third heat exchanger 2126. The coolant flowing out of the liquid outlet of the third heat exchanger 2126 flows into the liquid storage tank through the first liquid inlet 242a. During this process, the fan 2125 dissipates heat from the coolant in the third heat exchanger 2126. For the charging device, the coolant flowing in from the liquid inlet head 220b connected to the liquid return port of the charging device flows into the liquid cooling unit through the liquid inlet 211a2 of the liquid cooling unit 210, and the coolant flowing out of the liquid outlet 211b2 of the liquid cooling unit flows into the liquid storage tank through the first liquid inlet 241a. In this process, the heat dissipation of the coolant in the first coolant passage in the first heat exchanger 2122b can be achieved through multiple heat exchanges between the first heat exchanger and the second heat exchanger.

[0200] Therefore, in an embodiment of the present application, the liquid cooling unit includes 2N three-way valves, and every two three-way valves are connected to the corresponding first heat exchanger and the corresponding first liquid inlet. By controlling different three-way valves to conduct different pathways, the liquid cooling device can dissipate heat for different external devices based on different heat dissipation modes, thereby improving the flexibility of the heat dissipation modes adopted by the liquid cooling device when dissipating heat for different external devices.

[0201] In one embodiment, Figure 21 As shown, the liquid cooling unit 210 includes two one-way valves 2129a and 2129b and a pump 2128. The inlet of one of the one-way valves 2129a is connected to the outlet of the first refrigerant path, the outlet of one of the one-way valves 2129a is connected to the inlet of the second refrigerant path, the inlet of the other one-way valve 2129b is connected to the outlet of the second refrigerant path, and the outlet of the other one-way valve 2129b is connected to the inlet of the first refrigerant path. The outlet of the pump 2128 is connected to the inlet of the first refrigerant path, and the inlet of the pump 2128 is connected to the outlet of the second refrigerant path.

[0202] In the embodiment of the present application, compared with Figure 17In the embodiment shown, two one-way valves 2129a and 2129b and a pump 2128 are added. Under this design, switching between the natural heat dissipation mode and the mechanical refrigeration mode can also be achieved.

[0203] Specifically, when the outdoor ambient temperature is low, the coolant can be cooled using a natural heat dissipation mode. Taking the example of a liquid cooling device dissipating heat to an electric vehicle, the coolant in the liquid storage tank is delivered to the electric vehicle through the first liquid outlet 241b and the liquid outlet head 230a. This coolant can absorb the heat generated by the power battery during charging. The heat-absorbing coolant then flows into the first heat exchanger 2122a through the liquid inlet head 220a connected to the liquid return port of the electric vehicle. The first heat exchanger 2122a can transfer the heat absorbed by the coolant in the first coolant passage to the heat exchange liquid in the first refrigerant passage through heat exchange, thereby cooling the coolant in the first coolant passage. The cooled coolant in the first coolant passage then flows into the electric vehicle through the liquid outlet 211b1 of the liquid cooling unit, the first liquid inlet 241a, the first liquid outlet 241b, and the liquid filling port of the electric vehicle, continuing to circulate and dissipate heat for the electric vehicle. After heat exchange, the heat exchange fluid in the first refrigerant path can be cooled and circulated through the one-way valve 2129a, the second heat exchanger 2124, the pump 2128, and the expansion valve 2123. During this process, the compressor is not started, which can reduce power consumption and improve heat dissipation efficiency.

[0204] When the outdoor ambient temperature is high, the coolant can be cooled by mechanical refrigeration mode. Still taking the example of liquid cooling equipment dissipating heat to an electric vehicle, the coolant in the liquid storage tank is transported to the electric vehicle through the first liquid outlet 241b and the liquid outlet head 230a. The coolant can absorb the heat generated by the power battery during the charging process. Afterwards, the heat-absorbing coolant flows into the first heat exchanger 2122a through the liquid inlet head 220a connected to the liquid return port of the electric vehicle. The first heat exchanger 2122a can transfer the heat absorbed by the coolant in the first coolant passage to the heat exchange liquid in the first refrigerant passage through heat exchange, thereby cooling the coolant in the first coolant passage. Afterwards, the cooled coolant in the first coolant passage flows into the electric vehicle through the liquid outlet 211b1 of the liquid cooling unit, the first liquid inlet 241a, the first liquid outlet 241b and the liquid filling port of the electric vehicle, and continues to circulate and dissipate heat for the electric vehicle. After heat exchange, the heat exchange fluid in the first refrigerant path can be cooled and circulated through compressor 2121, second heat exchanger 2124, one-way valve 2129b, and expansion valve 2123. In this mode, the outdoor temperature requirement is relatively low, and even at higher temperatures, heat dissipation can be achieved for the electric vehicle, resulting in higher reliability.

[0205] In addition, the purpose of designing two one-way valves in this application is to prevent the reverse circulation of the heat exchange fluid. Specifically, in the mechanical refrigeration mode, after heat exchange, the heat exchange fluid in the first refrigerant path can pass through the compressor 2121, the second heat exchanger 2124, the one-way valve 2129b, and the expansion valve 2123 to achieve a cooling cycle of the heat exchange fluid. If the one-way valve 2129a is replaced with a two-way valve, the heat exchange fluid flowing out of the compressor may flow back through the two-way valve to the first heat exchanger, which is not conducive to achieving the cooling cycle of the first refrigerant path. Moreover, in this mode, since the pump 2128 is not in operation, the coolant flowing out of the one-way valve 2129b will not flow from the pump 2128 into the second heat exchanger 2124, thereby preventing the reverse circulation of the heat exchange fluid.

[0206] In natural cooling mode, after heat exchange, the heat exchange fluid in the first refrigerant path can be cooled and circulated through one-way valve 2129a, second heat exchanger 2124, pump 2128, and expansion valve 2123. If one-way valve 2129b is replaced with a two-way valve, the heat exchange fluid flowing from pump 2128 may flow back through the two-way valve to the second heat exchanger, hindering the cooling cycle of the first refrigerant path. Furthermore, in this mode, since the compressor is not operating, the coolant flowing from one-way valve 2129a will not flow from compressor 2121 into first heat exchanger 2122, thereby preventing reverse circulation of the heat exchange fluid.

[0207] It should be understood that the above Figure 21 It is shown that the one-way valve 2129b is located between the second heat exchanger and the expansion valve 2123. In another implementation, the one-way valve 2129b can also be located between the second heat exchanger and the compressor, and the above effect can still be achieved. The specific process is similar to the above process and will not be repeated here.

[0208] The embodiment of the present application adds two one-way valves 2129a, 2129b and a pump 2128. The liquid cooling device can achieve heat dissipation of the coolant through different modes. When the liquid cooling device achieves heat dissipation of the coolant in the natural heat dissipation mode, there is no need to start the compressor, which can reduce power consumption and improve heat dissipation efficiency. When the liquid cooling device achieves heat dissipation of the coolant in the mechanical refrigeration mode, the temperature requirement for the outdoor environment is low. Even if the temperature environment is high, the coolant can still be dissipated, and the reliability is high. The present application can flexibly switch the mode of heat dissipation of the coolant according to the temperature of the outdoor environment, which can not only achieve heat dissipation of the coolant, but also reduce power consumption, improve heat dissipation efficiency, and improve reliability.

[0209] In addition, the design of two one-way valves can also prevent the reverse circulation of the heat exchange fluid, which is conducive to the cooling cycle of the first refrigerant path, thereby facilitating the normal heat dissipation of the external equipment, and further facilitating the normal operation of the external equipment.

[0210] In one embodiment, the liquid cooling unit includes 2N one-way valves and N pumps. The N one-way valves are connected to the first refrigerant passages of the N first heat exchangers in a one-to-one correspondence, wherein the inlet of each of the N one-way valves is connected to the outlet of the corresponding first refrigerant passage, and wherein the outlet of each of the N one-way valves is connected to the inlet of the second refrigerant passage; another N one-way valves are connected to the first refrigerant passages of the N first heat exchangers in a one-to-one correspondence, wherein the outlet of each of the other N one-way valves is connected to the inlet of the corresponding first refrigerant passage, and the inlet of each of the other N one-way valves is connected to the outlet of the second refrigerant passage.

[0211] The N pumps are connected to the first refrigerant passages of the N first heat exchangers in a one-to-one correspondence, and the outlet of each of the N pumps is connected to the inlet of the corresponding first refrigerant passage, and the inlet of each of the N pumps is connected to the outlet of the second refrigerant passage.

[0212] refer to Figure 22 The figure uses four one-way valves and two pumps as an example. The inlet of one one-way valve 2129a1 is connected to the outlet of the first refrigerant passage of first heat exchanger 2122b, the outlet of one one-way valve 2129a1 is connected to the inlet of the second refrigerant passage, the inlet of another one-way valve 2129b1 is connected to the outlet of the second refrigerant passage, and the outlet of another one-way valve 2129b1 is connected to the inlet of the first refrigerant passage of first heat exchanger 2122b. The outlet of pump 2128a is connected to the inlet of the first refrigerant passage, and the inlet of pump 2128a is connected to the outlet of the second refrigerant passage.

[0213] Furthermore, the inlet of one check valve 2129a2 is connected to the outlet of the first refrigerant passage of first heat exchanger 2122a, the outlet of one check valve 2129a2 is connected to the inlet of the second refrigerant passage, the inlet of another check valve 2129b2 is connected to the outlet of the second refrigerant passage, and the outlet of another check valve 2129b2 is connected to the inlet of the first refrigerant passage of first heat exchanger 2122a. The outlet of pump 2128b is connected to the inlet of the first refrigerant passage, and the inlet of pump 2128b is connected to the outlet of the second refrigerant passage.

[0214] exist Figure 22 In the schematic diagram shown, the switching between natural heat dissipation mode and mechanical cooling mode can also be achieved. The specific process and effect are the same as above. Figure 21 For the sake of brevity, I will not elaborate on it.

[0215] It should be understood that in the above Figure 22In the schematic diagram shown, the liquid cooling system can also dissipate heat for different external devices simultaneously using two modes. For example, assuming that the liquid outlet 230a and the liquid inlet 220a are connected to a photovoltaic device, and the liquid outlet 230b and the liquid inlet 220b are connected to a charging device, the liquid cooling system can dissipate heat for the photovoltaic device using natural cooling mode. For the charging device, the liquid cooling system can dissipate heat using mechanical cooling mode.

[0216] Therefore, in an embodiment of the present application, the liquid cooling unit includes 2N one-way valves and N pumps. By controlling different one-way valves to conduct different paths, the liquid cooling device can dissipate heat for different external devices based on different heat dissipation modes, thereby improving the flexibility of the heat dissipation mode adopted by the liquid cooling device when dissipating heat for different external devices.

[0217] refer to Figure 23 In one embodiment, the liquid cooling device includes a three-way valve 260, the first valve port of the three-way valve 260 is connected to the second liquid outlet, the second valve port of the three-way valve 260 is connected to the liquid inlet of the first cooling liquid passage, and the third valve port of the three-way valve 260 is connected to the liquid inlet head.

[0218] When the liquid cooling device is connected to an external device, three-way valve 260 is used to open the passage between the liquid inlet head and the liquid inlet of the first coolant passage. When the liquid cooling device is not connected to an external device, three-way valve 260 is used to open the passage between the second liquid outlet and the liquid inlet of the first coolant passage.

[0219] In the embodiment of the present application, under normal circumstances, the coolant with higher temperature flows upward and the coolant with lower temperature flows downward. Therefore, the temperature of the coolant flowing out of the second liquid outlet 241c is higher than the temperature of the coolant flowing out of the first liquid outlet 241b. When the liquid cooling device is not connected to an external device, the three-way valve 260 opens the passage between the second liquid outlet 241c and the liquid inlet of the first coolant passage, so that the coolant in the liquid storage tank flows into the liquid inlet 211a1 of the liquid cooling unit 210 through the second liquid outlet 241c. The coolant with higher temperature undergoes heat exchange with the liquid cooling unit 210 and becomes a coolant with lower temperature. The coolant with lower temperature flows out of the liquid outlet 211b1 of the liquid cooling unit 210 and flows into the liquid storage tank 240 through the first liquid inlet 241a, thereby realizing the cooling circulation of the coolant in the liquid cooling device and achieving the purpose of lowering the temperature of the coolant in the liquid storage tank 240.

[0220] When the liquid cooling system is connected to an external device, three-way valve 260 opens the passage between the liquid inlet header and the liquid inlet of the first coolant passage. This allows coolant in the liquid reservoir to flow into the external device through first liquid outlet 241b and liquid outlet header 230a, absorbing heat generated by the external device. The heat-absorbed coolant then flows into liquid cooling unit 210 through liquid inlet header 220a, which is connected to the liquid return port of the external device. This transfers the heat generated by the external device to liquid cooling unit 210, dissipating heat from the external device.

[0221] In an embodiment of the present application, the three valve ports of the three-way valve included in the liquid cooling device are respectively connected to different liquid ports or liquid heads. This facilitates adjustment of the connectivity of the different valve ports of the three-way valve so that the three-way valve opens different paths. When the external device has a heat dissipation requirement, the liquid cooling device can open the path between the liquid inlet head and the liquid inlet of the first cooling liquid path to achieve liquid cooling of the external device. When the external device does not have a heat dissipation requirement, the liquid cooling device can open the path between the second liquid outlet and the liquid inlet of the first cooling liquid path to ensure the stability of the coolant temperature in the liquid storage tank, so as to meet the corresponding heat dissipation requirements of the external device when it has a heat dissipation requirement, thereby facilitating the normal operation of the external device.

[0222] In one embodiment, the liquid cooling device includes a liquid cooling gun, wherein a liquid outlet and a liquid inlet are located in the liquid cooling gun. The liquid outlet is used to transport coolant from the liquid cooling device to the electric vehicle, and the liquid inlet is used to transport coolant from the electric vehicle to the liquid cooling device.

[0223] In the embodiment of the present application, when the liquid cooling device dissipates heat to the electric vehicle, the liquid cooling device may include a liquid cooling gun. When the liquid cooling gun is connected to the electric vehicle, coolant from the liquid storage tank is delivered to the electric vehicle via a liquid outlet. This coolant absorbs heat generated by the power battery during charging. The heat-absorbing coolant then flows into liquid cooling unit 210 via a liquid inlet connected to the liquid return port of the electric vehicle, thereby transferring the heat generated by the electric vehicle to liquid cooling unit 210 and dissipating heat from the electric vehicle.

[0224] It should be understood that the liquid storage tanks in the above schematic diagrams are arranged based on the horizontal direction. In some embodiments, the liquid storage tanks can also be arranged based on the vertical direction, such as Figure 24 shown.

[0225] exist Figure 24In the embodiment, the first liquid inlet 241a of the liquid storage tank is still located on the bottom plate of the liquid storage tank, and the second liquid outlet 241c is located on the side plate near the top plate of the liquid storage tank. This allows the higher temperature coolant in the tank to exchange heat with the liquid cooling unit, thereby ensuring the normal cooling cycle of the coolant and improving the heat dissipation effect of the coolant cooling cycle. In addition, the first liquid outlet 241b is located on the bottom plate, which facilitates the delivery of coolant in the tank to external equipment, thereby facilitating the heat dissipation of the external equipment by the liquid cooling unit, and further promoting the normal operation of the external equipment.

[0226] It should be noted that Figure 24 (a) and Figure 24 The difference between (b) is that Figure 24 The liquid storage tank and the liquid cooling unit shown in (a) are arranged up and down. Figure 24 The liquid storage tank and liquid cooling unit shown in (b) are arranged on the left and right, according to Figure 24 The advantage of design (b) is that it facilitates the expansion of the capacity of the liquid storage tank. When the liquid cooling device is used to dissipate heat for multiple devices, the liquid cooling device can meet the heat dissipation needs of multiple devices.

[0227] Figure 24 The specific heat dissipation process is similar to that of the above embodiment and will not be described again for the sake of brevity.

[0228] In addition, the present application also provides a new energy system, which includes at least two devices among photovoltaic equipment, energy storage equipment, and charging equipment and the liquid cooling device in any of the above embodiments, and the liquid cooling device is used to dissipate heat for at least two devices among photovoltaic equipment, energy storage equipment, and charging equipment and electric vehicles.

[0229] For details about the liquid cooling equipment, please refer to the above text and will not be repeated here.

[0230] In one embodiment, the liquid cooling channels of different devices in at least two devices are not connected to each other, and each liquid cooling channel is used to separately receive the cooling liquid of the liquid cooling device; or, the liquid cooling channels of at least some of the devices in at least two devices are connected.

[0231] In an embodiment of the present application, in one implementation, when the liquid cooling device dissipates heat for at least two devices, the liquid cooling channels of the at least two devices may not be connected to each other, so that the liquid cooling channel of each of the at least two devices can separately receive the coolant of the liquid cooling device. In this way, the coolant in the liquid cooling channel of each device will not affect each other, which is beneficial to the normal heat dissipation of each device by the liquid cooling device, and further beneficial to the normal operation of each of the at least two devices.

[0232] In another implementation, when the liquid cooling device dissipates heat for at least two devices, the liquid cooling channels of at least some of the at least two devices are connected, so that the coolant flowing out of one of the devices flows into the other device, or the coolant flowing out of the liquid outlet of the cooling liquid channel of at least some of the devices flows into the liquid cooling unit or liquid storage tank through the same liquid inlet head, or the coolant flowing out through the same liquid outlet head flows into the liquid inlet of the cooling liquid channel of at least some of the devices, which can reduce the number of liquid outlet heads and liquid inlet heads of the liquid cooling device and simplify the design of the liquid cooling device.

[0233] In one embodiment, the liquid cooling channels of different devices in at least two devices are not connected to each other, and the liquid cooling device includes multiple liquid outlet heads and multiple liquid inlet heads.

[0234] The plurality of liquid outlet heads are used to connect to the liquid inlet of the liquid cooling channel of each of the at least two devices and the liquid inlet of the liquid cooling channel of the electric vehicle in a one-to-one correspondence. The plurality of liquid inlet heads are used to connect to the liquid outlet of the liquid cooling channel of each of the at least two devices and the liquid outlet of the liquid cooling channel of the electric vehicle in a one-to-one correspondence.

[0235] refer to Figure 25 In the figure, taking at least two devices including a photovoltaic device and a charging device as an example, the liquid cooling device includes three liquid outlet heads and three liquid inlet heads. The three liquid outlet heads are respectively liquid outlet heads 230a, 230b, and 230c, and the three liquid inlet heads are respectively liquid inlet heads 220a, 220b, and 220c.

[0236] Furthermore, liquid outlet 230a is connected to the liquid inlet of the photovoltaic device, and liquid inlet 220a is connected to the liquid return port of the photovoltaic device. Liquid outlet 230b is connected to the liquid inlet of the charging device, and liquid inlet 220b is connected to the liquid return port of the charging device. Liquid outlet 230c is connected to the liquid inlet of the electric vehicle, and liquid inlet 220c is connected to the liquid return port of the electric vehicle.

[0237] The advantage of this design is that the liquid cooling channels of each device are not connected to each other, and the coolant in the liquid cooling channel of one device will not affect the coolant in the liquid cooling channel of another device. The liquid cooling device can independently dissipate heat for each device, thereby meeting the relevant requirements of the coolant of each device, improving the reliability of the liquid cooling device in dissipating heat for each device, and thus facilitating the normal operation of each of the at least two devices and the electric vehicle.

[0238] In one embodiment, at least two devices include three devices, the liquid cooling channels of some of the three devices are connected in series, and the liquid cooling channels of other devices are not connected to each other, and the liquid cooling device includes multiple liquid inlet heads and multiple liquid outlet heads.

[0239] Among them, one of the multiple liquid inlet heads is connected to the liquid inlet of the liquid cooling channel of one device in the partial equipment, and one of the multiple liquid outlet heads is connected to the liquid outlet of the liquid cooling channel of another device in the partial equipment. Each of the multiple liquid inlet heads except one is used to connect one-to-one with the liquid outlet of the liquid cooling channel of each device in the other devices and the liquid outlet of the liquid cooling channel of the electric vehicle; each of the multiple liquid outlet heads except one is used to connect one-to-one with the liquid inlet of the liquid cooling channel of each device in the other devices and the liquid inlet of the liquid cooling channel of the electric vehicle.

[0240] refer to Figure 26 In the figure, taking at least two devices including photovoltaic equipment, charging equipment and energy storage equipment as an example, the liquid cooling equipment includes 3 liquid outlet heads and 3 liquid inlet heads. The 3 liquid outlet heads are respectively liquid outlet heads 230a, 230b, and 230c, and the 3 liquid inlet heads are respectively liquid inlet heads 220a, 220b, and 220c.

[0241] Furthermore, liquid outlet 230a is connected to the liquid inlet of the charging device, the liquid return port of the charging device is connected to the liquid inlet of the photovoltaic device, and the liquid return port of the photovoltaic device is connected to liquid inlet 220a. Liquid outlet 230b is connected to the liquid inlet of the energy storage device, and liquid inlet 220b is connected to the liquid return port of the energy storage device. Liquid outlet 230c is connected to the liquid inlet of the electric vehicle, and liquid inlet 220c is connected to the liquid return port of the electric vehicle.

[0242] In a specific implementation, in a scenario where the photovoltaic device transmits electrical energy to the charging device, the cooling device transmits cooling liquid to the charging device through the liquid outlet 230a. The cooling liquid can absorb the heat generated by the charging device during the process of receiving electrical energy. Then, the cooling liquid that absorbs heat flows into the photovoltaic device through the liquid injection port of the photovoltaic device connected to the liquid return port of the charging device. The cooling liquid flowing into the photovoltaic device can further absorb the heat generated by the photovoltaic device during the energy conversion process. Afterwards, the cooling liquid that absorbs the heat generated by the photovoltaic device flows into the liquid cooling unit 210 through the liquid inlet 220a connected to the liquid return port of the photovoltaic device, thereby bringing the heat generated by the charging device during the process of receiving electrical energy and the heat generated by the photovoltaic device during the energy conversion process to the liquid cooling unit 210, thereby achieving heat dissipation for the charging device and the photovoltaic device.

[0243] The advantage of this design is that the liquid cooling device has fewer liquid outlets and inlet heads. Consequently, fewer connections are required between the liquid inlet head and the liquid cooling unit and liquid storage tank, as well as between the liquid outlet head and the liquid storage tank, simplifying the design of the liquid cooling device. Furthermore, with this design, since one liquid inlet head is connected to the liquid inlet of the liquid cooling channel of one device in the partial equipment, and one liquid outlet head is connected to the liquid outlet of the liquid cooling channel of another device in the partial equipment, this is equivalent to connecting the devices in series, i.e., the liquid return port of one device in the partial equipment is connected to the liquid injection port of another device in the partial equipment. Thus, the liquid cooling device simultaneously dissipates heat from the partial equipment through one liquid outlet head and one liquid inlet head. In other words, circulating heat between the liquid cooling device and the partial equipment can be achieved through a single path, resulting in a relatively simple design and ease of implementation.

[0244] In addition, the liquid cooling channels of the other devices in at least two devices are not connected, and the liquid filling ports of the other devices and electric vehicles are connected one-to-one with the liquid outlet heads of the liquid cooling devices, and the liquid return ports of the other devices and electric vehicles are connected one-to-one with the liquid inlet heads of the liquid cooling devices, thereby meeting the relevant requirements of the coolant of the other devices and electric vehicles, improving the reliability of the liquid cooling equipment in dissipating heat for the other devices and electric vehicles, and thus facilitating the normal operation of the other devices and electric vehicles.

[0245] Moreover, since electric vehicles may only have heat dissipation needs when charging, the liquid outlet and liquid inlet heads designed in this application for connecting electric vehicles are different from the liquid outlet and liquid inlet heads for connecting at least two devices. This can better meet the heat dissipation needs of electric vehicles, is conducive to the normal charging of electric vehicles, and can also facilitate users to connect electric vehicles and liquid cooling equipment, thereby improving user experience.

[0246] In one embodiment, the liquid cooling channels of each of the at least two devices are connected in series, and the liquid cooling device includes two liquid inlet heads and two liquid outlet heads.

[0247] Among them, one of the two liquid inlet heads is connected to the liquid outlet of the liquid cooling channel of at least one of the two devices, and one of the two liquid outlet heads is connected to the liquid inlet of the liquid cooling channel of at least another of the two devices; the other of the two liquid inlet heads is used to connect to the liquid outlet of the liquid cooling channel of the electric vehicle, and the other of the two liquid outlet heads is used to connect to the liquid inlet of the liquid cooling channel of the electric vehicle.

[0248] refer to Figure 27 In the figure, taking at least two devices including photovoltaic equipment, charging equipment, and energy storage equipment as an example, the liquid cooling device includes two liquid outlet heads and two liquid inlet heads. The two liquid outlet heads are liquid outlet heads 230a and 230b, and the two liquid inlet heads are liquid inlet heads 220a and 220b.

[0249] Furthermore, liquid outlet 230a is connected to the liquid inlet of the charging device, the liquid return port of the charging device is connected to the liquid inlet of the energy storage device, the liquid return port of the energy storage device is connected to the liquid inlet of the photovoltaic device, and the liquid return port of the photovoltaic device is connected to liquid inlet 220a. Liquid outlet 230b is connected to the liquid inlet of the electric vehicle, and liquid inlet 220b is connected to the liquid return port of the electric vehicle.

[0250] In a specific implementation, in a scenario where the photovoltaic device transmits electrical energy to the charging device and the energy storage device, the cooling device transmits coolant to the charging device via the liquid outlet 230a. This coolant can absorb the heat generated by the charging device during the power reception process. The heat-absorbing coolant then flows into the energy storage device through the liquid inlet of the energy storage device connected to the liquid return port of the charging device. The coolant flowing into the energy storage device can further absorb the heat generated by the energy storage device during the energy storage process. Afterwards, the coolant that absorbs the heat generated by the energy storage device flows into the photovoltaic device through the liquid inlet connected to the photovoltaic device. The coolant that flows into the photovoltaic device can further absorb the heat generated by the photovoltaic device during the energy conversion process. The coolant that absorbs the heat generated by the photovoltaic device then flows into the liquid cooling unit 210 via the liquid inlet 220a connected to the liquid return port of the photovoltaic device. This transfers the heat generated by the charging device during the power reception process and the heat generated by the photovoltaic device during the energy conversion process to the liquid cooling unit 210, thereby dissipating heat from the charging device and the photovoltaic device.

[0251] The advantage of this design is that the liquid cooling device has fewer liquid outlet and inlet heads. Consequently, fewer connections are required between the liquid inlet head and the liquid cooling unit and liquid storage tank, as well as between the liquid outlet head and the liquid storage tank, simplifying the design of the liquid cooling device. Furthermore, with this design, since one liquid inlet head is connected to the liquid inlet of the liquid cooling channel of one device in the group, and one liquid outlet head is connected to the liquid outlet of the liquid cooling channel of another device in the group, this is equivalent to connecting at least two devices in series. Thus, the liquid cooling device simultaneously dissipates heat from the at least two devices via one liquid outlet head and one liquid inlet head. This means that circulating heat between the liquid cooling device and the at least two devices only requires a single path, resulting in a relatively simple and easy-to-implement design.

[0252] In addition, the other liquid outlet of the liquid cooling device can be connected to the liquid filling port of the electric vehicle, and the other liquid inlet of the liquid cooling device can be connected to the liquid return port of the electric vehicle, thereby meeting the relevant requirements of the electric vehicle for coolant and improving the reliability of the liquid cooling device in dissipating heat for the electric vehicle. Moreover, since electric vehicles may only have heat dissipation requirements when charging, the liquid outlet and liquid inlet designed in this application are different from the liquid outlet and liquid inlet connected to at least two devices. This can better meet the heat dissipation requirements of the electric vehicle, facilitate the normal charging of the electric vehicle, and facilitate users to connect the electric vehicle and the liquid cooling device, thereby improving the user experience.

[0253] In one embodiment, the liquid cooling device includes multiple liquid outlets and multiple liquid inlet heads. One of the multiple liquid outlets is configured to connect to the liquid inlet of the liquid cooling channel of the electric vehicle, and one of the multiple liquid inlet heads is configured to connect to the liquid return port of the liquid cooling channel of the electric vehicle. The liquid inlet of some or all of the at least two devices is connected to a liquid outlet other than one of the multiple liquid outlets; alternatively, the liquid return port of some or all of the at least two devices is connected to a liquid inlet other than one of the multiple liquid inlet heads.

[0254] refer to Figure 28 In the figure, taking at least two devices including photovoltaic equipment, charging equipment and energy storage equipment as an example, the liquid cooling equipment includes 3 liquid outlet heads and 2 liquid inlet heads. The 2 liquid outlet heads are liquid outlet heads 230a, 230b, and 230c respectively, and the 2 liquid inlet heads are liquid inlet heads 220a and 220c respectively.

[0255] Furthermore, liquid outlet 230a is connected to the liquid inlet of the charging device, the liquid return port of the charging device is connected to the liquid inlet of the photovoltaic device, and the liquid return port of the photovoltaic device is connected to liquid inlet 220a. Liquid outlet 230b is connected to the liquid inlet of the energy storage device, and the liquid return port of the energy storage device is also connected to liquid inlet 220a. Liquid outlet 230c is connected to the liquid inlet of the electric vehicle, and liquid inlet 220c is connected to the liquid return port of the electric vehicle.

[0256] In a specific implementation, in a scenario where the photovoltaic device transmits electrical energy to the charging device, the liquid cooling device transmits cooling liquid to the charging device through the liquid outlet 230a. The cooling liquid can absorb the heat generated by the charging device during the process of receiving electrical energy. Then, the cooling liquid that absorbs heat flows into the photovoltaic device through the liquid injection port of the photovoltaic device connected to the liquid return port of the charging device. The cooling liquid flowing into the photovoltaic device can further absorb the heat generated by the photovoltaic device during the energy conversion process. Afterwards, the cooling liquid that absorbs the heat generated by the photovoltaic device flows into the liquid cooling unit 210 through the liquid inlet 220a connected to the liquid return port of the photovoltaic device, thereby bringing the heat generated by the charging device during the process of receiving electrical energy and the heat generated by the photovoltaic device during the energy conversion process to the liquid cooling unit 210, thereby achieving heat dissipation for the charging device and the photovoltaic device.

[0257] The liquid cooling device also dissipates heat for the energy storage device. The cooling device delivers coolant to the energy storage device via the liquid outlet 230b. This coolant absorbs the heat generated by the energy storage device during the energy storage process. The heat-absorbing coolant then flows into the liquid cooling unit 210 via the liquid inlet 220a connected to the liquid return port of the energy storage device. This transfers the heat generated by the energy storage device to the liquid cooling unit 210, dissipating the heat generated by the energy storage device during the energy storage process.

[0258] refer to Figure 29In the figure, taking at least two devices including photovoltaic equipment and charging equipment as an example, the liquid cooling device includes two liquid outlet heads and three liquid inlet heads. The two liquid outlet heads include liquid outlet heads 230a and 230c, and the three liquid inlet heads include liquid inlet heads 220a, 220b, and 220c.

[0259] Furthermore, liquid outlet 230a is connected to the liquid inlet of the charging device, the liquid return port of the charging device is connected to the liquid inlet of the photovoltaic device, and the liquid return port of the photovoltaic device is connected to liquid inlet 220a. Liquid outlet 230a is also connected to the liquid inlet of the energy storage device, while liquid inlet 220b is connected to the liquid return port of the energy storage device. Liquid outlet 230c is connected to the liquid inlet of the electric vehicle, while liquid inlet 220c is connected to the liquid return port of the electric vehicle.

[0260] Figure 29 and Figure 28 The difference is that Figure 28 In the liquid cooling device, there are 3 liquid outlet heads and 2 liquid inlet heads, and at least two devices flow into the liquid cooling device through the same liquid inlet head. Figure 29 In the embodiment, the liquid cooling device includes 2 liquid outlet heads and 3 liquid inlet heads. The liquid cooling device flows into at least two devices through the same liquid outlet head. The specific process is similar to the above and will not be repeated here.

[0261] The advantage of this design is that the number of liquid outlets and inlet heads in the liquid cooling device is relatively flexible. When the liquid inlets of some or all of the at least two devices are connected to the same liquid outlet head, the number of connections between the liquid outlet head and the liquid storage tank is correspondingly reduced. When the liquid return ports of some or all of the at least two devices are connected to the same liquid inlet head, the number of connections between the liquid inlet head and the liquid cooling unit and the liquid storage tank is also reduced, simplifying the design of the liquid cooling device. Furthermore, with this design, since the same liquid outlet head or the same liquid inlet head is connected to some or all of the at least two devices, the liquid cooling device simultaneously dissipates heat from some or all of the at least two devices through the same liquid outlet head or the same liquid inlet head, resulting in lower energy consumption, a simpler design, and ease of implementation.

[0262] In addition, the other liquid outlet of the liquid cooling device can be connected to the liquid filling port of the electric vehicle, and the other liquid inlet of the liquid cooling device can be connected to the liquid return port of the electric vehicle, thereby meeting the relevant requirements of the electric vehicle for coolant and improving the reliability of the liquid cooling device in dissipating heat for the electric vehicle. Moreover, since electric vehicles may only have heat dissipation requirements when charging, the liquid outlet and liquid inlet designed in this application are different from the liquid outlet and liquid inlet connected to at least two devices. This can better meet the heat dissipation requirements of the electric vehicle, facilitate the normal charging of the electric vehicle, and facilitate users to connect the electric vehicle and the liquid cooling device, thereby improving the user experience.

[0263] In one embodiment, the charging device includes a charging module and a charging gun, the charging module is used to output electrical energy through the charging gun to charge the electric vehicle, and the liquid cooling device is used to dissipate heat for the charging module and the charging gun.

[0264] The present embodiment further refines the charging device, which includes a charging module and a charging gun. Liquid cooling can dissipate heat from the charging module and the charging gun to meet their heat dissipation requirements and ensure the normal operation of the charging device. The specific heat dissipation process is similar to that described above and will not be further described.

[0265] The above are only specific embodiments of the present application, but the scope of protection of this application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A liquid cooling device, characterized in that: The liquid cooling device is used to perform heat exchange with multiple external devices, and the liquid cooling device includes a liquid cooling unit, a liquid inlet head, and a liquid outlet head. The liquid outlet head is used to connect to the liquid injection port of the external device, and the liquid inlet head is used to connect to the liquid return port of the external device. The multiple external devices include at least two devices selected from photovoltaic devices, energy storage devices, and charging devices, and electric vehicles. The liquid inlet of the liquid cooling unit is connected to the liquid inlet head, and the liquid outlet of the liquid cooling unit is connected to the liquid outlet head.

2. The liquid cooling device according to claim 1, characterized in that The liquid cooling unit includes a compressor, N first heat exchangers, N expansion valves, and a second heat exchanger, wherein the N first heat exchangers and the N expansion valves are connected in a one-to-one correspondence, and each expansion valve is connected to the corresponding first heat exchanger, the compressor, and the second heat exchanger in sequence, where N is an integer greater than or equal to 2; The first heat exchanger includes a first refrigerant passage and a first coolant passage, the first refrigerant passage is used to exchange heat with the first coolant passage, the second heat exchanger includes a second refrigerant passage, each of the first refrigerant passages is connected between the compressor and the corresponding expansion valve, the second refrigerant passage is connected between the compressor and the N expansion valves, the liquid inlet of the first coolant passage is connected to the liquid inlet head, and the liquid outlet of the first coolant passage is connected to the liquid outlet head.

3. The liquid cooling device according to claim 2, characterized in that: The liquid cooling device includes N liquid outlet heads and N liquid inlet heads; The N liquid outlet heads are connected to the liquid outlets of the N first coolant passages in a one-to-one correspondence, and the N liquid inlet heads are connected to the liquid inlets of the N first coolant passages in a one-to-one correspondence.

4. The liquid cooling device according to claim 3, characterized in that: The liquid cooling device further includes a liquid storage tank, the liquid storage tank including N chambers, the N chambers being disconnected, and the liquid outlets of the N first cooling liquid passages being connected to the N liquid outlet heads in a one-to-one correspondence through the N chambers; The liquid storage tank includes N first liquid outlets and N first liquid inlets, the N first liquid outlets are connected to the N chambers in a one-to-one correspondence, the N first liquid inlets are connected to the N chambers in a one-to-one correspondence, the liquid outlet of the first coolant passage is connected to the corresponding first liquid inlet, and the first liquid outlet is connected to the corresponding liquid outlet head.

5. The liquid cooling device according to claim 4, characterized in that: The liquid storage tank further includes N second liquid outlets, the N second liquid outlets are connected to the N chambers in a one-to-one correspondence, and the N second liquid outlets are connected to the N liquid inlets of the first coolant passages in a one-to-one correspondence.

6. The liquid cooling device according to claim 5, characterized in that: At least one of the N liquid inlet heads is connected to the corresponding liquid inlet of at least one of the first coolant passages through the corresponding at least one first liquid inlet and the corresponding at least one second liquid outlet.

7. The liquid cooling device according to claim 1, characterized in that: The liquid cooling unit comprises a compressor, a first heat exchanger, an expansion valve and a second heat exchanger connected in sequence; The first heat exchanger includes a first refrigerant passage and a first coolant passage, the first refrigerant passage is used to exchange heat with the first coolant passage, the second heat exchanger includes a second refrigerant passage, the first refrigerant passage and the second refrigerant passage are both connected between the compressor and the expansion valve, the liquid inlet of the first coolant passage is connected to the liquid inlet head, and the liquid outlet of the first coolant passage is connected to the liquid outlet head.

8. The liquid cooling device according to claim 7, characterized in that: The liquid cooling device further includes a liquid storage tank, the liquid storage tank including a tank body and at least one partition plate, the at least one partition plate being used to separate the tank body into an upper chamber and a lower chamber, the upper chamber and the lower chamber being in communication; The box body is provided with a first liquid inlet and a first liquid outlet, the first liquid inlet and the first liquid outlet are both located in the box body corresponding to the lower chamber, the first liquid inlet is connected to the liquid outlet of the first coolant passage, and the first liquid outlet is connected to the liquid inlet of the first coolant passage; The box body is further provided with a second liquid outlet, which is located in the box body corresponding to the upper chamber, and the second liquid outlet is connected to the liquid inlet of the first coolant passage.

9. The liquid cooling device according to claim 8, characterized in that: The box body includes a top plate, a bottom plate and a plurality of side plates, the top plate and the bottom plate are arranged opposite to each other, and the plurality of side plates are located between the top plate and the bottom plate; The at least one partition plate includes a partition plate, the partition plate is disposed between the top plate and the bottom plate, and there is a gap between the partition plate and at least one of the side plates; or The at least one partition plate includes a plurality of partition plates, and the plurality of partition plates are arranged between the top plate and the bottom plate. The plurality of partition plates are arranged in an interval along a first direction, and the first direction is perpendicular to the direction from the top plate to the bottom plate.

10. The liquid cooling device according to any one of claims 2 to 9, characterized in that: The liquid cooling unit also includes a third heat exchanger and a fan, the air outlet of the fan is directed toward the third heat exchanger and the second heat exchanger, the liquid inlet of the third heat exchanger is connected to the liquid inlet head or the second liquid outlet, and the liquid outlet of the third heat exchanger is connected to the liquid outlet head.

11. The liquid cooling device according to any one of claims 2 to 6, characterized in that: The second heat exchanger further includes a second coolant passage, the second refrigerant passage being configured to perform heat exchange with the second coolant passage; The liquid cooling unit further includes a third heat exchanger, a fan, and 2N three-way valves, wherein the air outlet of the fan faces the third heat exchanger, the liquid outlet of the third heat exchanger is connected to the liquid inlet of the second coolant passage, and the liquid inlet of the third heat exchanger is connected to the liquid outlet of the second coolant passage; wherein N three-way valves are connected to the N first heat exchangers in a one-to-one correspondence, and the other N three-way valves are all connected to the third heat exchanger; The first valve port of each of the N three-way valves is connected to the corresponding liquid inlet of the first coolant passage, the second valve port of each of the N three-way valves is connected to the liquid inlet of the third heat exchanger, and the third valve port of each of the N three-way valves is connected to the liquid inlet head; The first valve port of each of the other N three-way valves is connected to the liquid outlet of the third heat exchanger, the second valve port of each of the other N three-way valves is connected to the liquid inlet of the second coolant passage, and the third valve port of each of the other N three-way valves is connected to the liquid outlet head.

12. The liquid cooling device according to any one of claims 7 to 9, characterized in that: The second heat exchanger further includes a second coolant passage, the second refrigerant passage being configured to perform heat exchange with the second coolant passage; The liquid cooling unit further includes a third heat exchanger, a fan, and two three-way valves, wherein the air outlet of the fan faces the third heat exchanger, the liquid outlet of the third heat exchanger is connected to the liquid inlet of the second coolant passage, and the liquid inlet of the third heat exchanger is connected to the liquid outlet of the second coolant passage; The first valve port of one of the three-way valves is connected to the liquid inlet of the first coolant passage, the second valve port of one of the three-way valves is connected to the liquid inlet of the third heat exchanger, and the third valve port of one of the three-way valves is connected to the liquid inlet head; The first valve port of the other three-way valve is connected to the liquid outlet of the third heat exchanger, the second valve port of the other three-way valve is connected to the liquid inlet of the second coolant passage, and the third valve port of the other three-way valve is connected to the liquid outlet head.

13. The liquid cooling device according to any one of claims 2 to 6, characterized in that: The liquid cooling unit includes 2N one-way valves and N pumps; wherein the N one-way valves are connected to the first refrigerant passages of the N first heat exchangers in a one-to-one correspondence, the inlet of each of the N one-way valves being connected to the outlet of the corresponding first refrigerant passage, and the outlet of each of the N one-way valves being connected to the inlet of the second refrigerant passage; The other N one-way valves are connected to the first refrigerant passages of the N first heat exchangers in a one-to-one correspondence, the outlet of each of the other N one-way valves being connected to the inlet of the corresponding first refrigerant passage, and the inlet of each of the other N one-way valves being connected to the outlet of the second refrigerant passage; The N pumps are connected to the first refrigerant passages of the N first heat exchangers in a one-to-one correspondence, and the outlet of each of the N pumps is connected to the inlet of the corresponding first refrigerant passage, and the inlet of each of the N pumps is connected to the outlet of the second refrigerant passage.

14. The liquid cooling device according to any one of claims 7 to 9, characterized in that: The liquid cooling unit includes two one-way valves and a pump, wherein the inlet of one of the one-way valves is connected to the outlet of the first refrigerant passage, the outlet of one of the one-way valves is connected to the inlet of the second refrigerant passage, the inlet of the other one-way valve is connected to the outlet of the second refrigerant passage, and the outlet of the other one-way valve is connected to the inlet of the first refrigerant passage; The outlet of the pump is connected to the inlet of the first refrigerant passage, and the inlet of the pump is connected to the outlet of the second refrigerant passage.

15. A new energy system, characterized in that: The new energy system includes at least two devices among photovoltaic equipment, energy storage equipment and charging equipment, and a liquid cooling device as described in any one of claims 1 to 14, and the liquid cooling device is used to dissipate heat for at least two devices among the photovoltaic equipment, energy storage equipment and charging equipment and the electric vehicle.

16. The new energy system according to claim 15, characterized in that: The liquid cooling channels of different devices in the at least two devices are not connected to each other, and each of the liquid cooling channels is used to separately receive the cooling liquid of the liquid cooling device; or The liquid cooling channels of at least some of the at least two devices are connected.

17. The new energy system according to claim 16, characterized in that: The liquid cooling channels of different devices in the at least two devices are not connected to each other, and the liquid cooling device includes multiple liquid outlet heads and multiple liquid inlet heads; The plurality of liquid outlet heads are used to be connected to the liquid inlet of the liquid cooling channel of each of the at least two devices and the liquid inlet of the liquid cooling channel of the electric vehicle in a one-to-one correspondence; The multiple liquid inlet heads are used to be connected to the liquid outlet of the liquid cooling channel of each of the at least two devices and the liquid outlet of the liquid cooling channel of the electric vehicle in a one-to-one correspondence.

18. The new energy system according to claim 16, characterized in that: The at least two devices include three devices, the liquid cooling channels of some of the three devices are connected in series, and the liquid cooling channels of other devices are not connected to each other, and the liquid cooling device includes multiple liquid inlet heads and multiple liquid outlet heads; One of the multiple liquid inlet heads is connected to the liquid inlet of the liquid cooling channel of one of the devices in the partial equipment, and one of the multiple liquid outlet heads is connected to the liquid outlet of the liquid cooling channel of another device in the partial equipment; Each of the plurality of liquid inlet heads except the one liquid inlet head is used to be connected to a liquid outlet of a liquid cooling channel of each of the other devices and a liquid outlet of the liquid cooling channel of the electric vehicle in a one-to-one correspondence; Each of the plurality of liquid outlet heads except the one liquid outlet head is used to be connected to the liquid inlet of the liquid cooling channel of each of the other devices and the liquid inlet of the liquid cooling channel of the electric vehicle in a one-to-one correspondence.

19. The new energy system according to claim 16, characterized in that: The liquid cooling channels of each of the at least two devices are connected in series, and the liquid cooling device includes two liquid inlet heads and two liquid outlet heads; One of the two liquid inlet heads is connected to the liquid outlet of the liquid cooling channel of one of the at least two devices, and one of the two liquid outlet heads is connected to the liquid inlet of the liquid cooling channel of another of the at least two devices; The other of the two liquid inlet heads is used to connect to the liquid outlet of the liquid cooling channel of the electric vehicle, and the other of the two liquid outlet heads is used to connect to the liquid inlet of the liquid cooling channel of the electric vehicle.

20. The new energy system according to claim 16, characterized in that: The liquid cooling device includes a plurality of liquid outlet heads and a plurality of liquid inlet heads; One of the plurality of liquid outlet heads is used to connect to the liquid filling port of the liquid cooling channel of the electric vehicle, and one of the plurality of liquid inlet heads is used to connect to the liquid return port of the liquid cooling channel of the electric vehicle; The liquid injection ports of some or all of the at least two devices are connected to a liquid outlet head other than the one of the liquid outlet heads among the multiple liquid outlet heads; or The liquid return ports of some or all of the at least two devices are connected to a liquid inlet head other than the one of the liquid inlet heads among the multiple liquid inlet heads.

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