Heat dissipation system and energy storage all-in-one machine

Abstract

The utility model discloses a heat dissipation system and an energy storage all-in-one machine, the energy storage all-in-one machine comprises a battery module and an energy storage converter, and the heat dissipation system comprises a liquid cooling heat dissipation module, a thermosyphon radiator and a fan; the liquid cooling heat dissipation module comprises a liquid cooling heat dissipation pipeline and a first condenser, and the liquid cooling heat dissipation pipeline is connected with the battery module and the first condenser; the thermosyphon radiator comprises an evaporator and a second condenser, the evaporator is connected with the second condenser through a circulation pipeline to form a circulation loop, and the evaporator is in heat conduction contact with the heating unit of the energy storage converter; and the first condenser and the second condenser share a fan for cooling. In the embodiment of the invention, the thermosyphon radiator is used for radiating the energy storage converter, and meanwhile, the thermosyphon radiator and the liquid cooling radiating module share the fan for cooling and radiating the second condenser, so that a pump, a heat exchanger, a valve and other parts can be omitted, the whole machine power is not occupied, the system efficiency is improved, the system cost is reduced, and the whole machine volume is reduced.

Description

Technical Field

[0001] This application belongs to the field of thermal management technology, and in particular relates to a heat dissipation system and an integrated energy storage unit. Background Technology

[0002] For integrated energy storage units employing liquid cooling, the thermal management system requires power components to supply coolant to the energy storage converter, while the compressor also needs to provide a certain amount of cooling capacity, which consumes a portion of the unit's power and thus affects overall efficiency. Furthermore, to dissipate heat from the energy storage converter, a cold plate radiator is typically required. The corresponding thermal management system also includes heat exchangers, pumps, piping, three-way valves, and other components, increasing the cost of the thermal management system and consequently increasing the size of the integrated unit. Utility Model Content

[0003] In view of this, this application provides a heat dissipation system and an integrated energy storage unit, which can solve the problems of excessively high cost of heat dissipation systems in the prior art, which leads to a decrease in the overall efficiency and an increase in the size of the integrated unit.

[0004] In a first aspect, this application provides a heat dissipation system applied to an integrated energy storage device, the integrated energy storage device including a battery module and an energy storage converter, the heat dissipation system including: a liquid-cooled heat dissipation module, a thermosiphon radiator and a fan; the liquid-cooled heat dissipation module including liquid-cooled heat dissipation pipes and a first condenser, the liquid-cooled heat dissipation pipes being connected to the battery module and the first condenser respectively; the thermosiphon radiator including an evaporator and a second condenser, the evaporator being connected to the second condenser through a circulation pipe to form a circulation loop, the evaporator being in thermal contact with the heating unit of the energy storage converter; the first condenser and the second condenser sharing the fan for cooling.

[0005] Optionally, the liquid cooling heat dissipation pipeline includes a refrigerant pipeline, a coolant pipeline, and a heat exchanger. The refrigerant pipeline is connected to the first heat exchange side of the first condenser and the heat exchanger, respectively. The refrigerant pipeline includes a first power component for driving the refrigerant in the refrigerant pipeline to circulate between the first condenser and the heat exchanger. The coolant pipeline is connected to the second heat exchange side of the battery module and the heat exchanger, respectively. The coolant pipeline includes a second power component for driving the coolant in the coolant pipeline to circulate between the battery module and the heat exchanger.

[0006] Optionally, the first power component is a compressor, and the second power component is a pump.

[0007] Optionally, the liquid cooling heat dissipation pipeline includes a third power component, which is used to drive the coolant in the liquid cooling heat dissipation pipeline to circulate between the first condenser and the battery module.

[0008] Optionally, the liquid cooling heat dissipation pipeline further includes a three-way valve, wherein the first and second valve ports of the three-way valve are connected in series in the connecting pipeline between the battery module and the third power component, and the third valve port of the three-way valve is connected to the pipeline on the side of the third power component away from the three-way valve through a parallel pipeline.

[0009] Optionally, the liquid cooling heat dissipation module further includes a heater disposed on the liquid cooling heat dissipation pipeline, the heater being used to heat the coolant in the liquid cooling heat dissipation pipeline.

[0010] Secondly, this application also provides an integrated energy storage device, including a battery module, an energy storage converter, and a heat dissipation system as described in any of the preceding claims.

[0011] Optionally, the integrated energy storage unit further includes a body, which includes a power compartment for housing the energy storage converter. The power compartment is divided into an upper cavity and a lower cavity. The fan, first condenser, and second condenser of the heat dissipation system are all located in the upper cavity. The energy storage converter includes a circuit board and power devices mounted on the circuit board. The circuit board and the power devices are all located in the lower cavity. The power devices are thermally connected to the evaporator of the thermosiphon radiator.

[0012] Optionally, the energy storage converter further includes a reactor, which is electrically connected to the circuit board and is disposed in the upper cavity.

[0013] Optionally, the body also includes a battery compartment for placing the battery module, the battery compartment being located above the power compartment.

[0014] In this embodiment, by using a thermosiphon radiator to dissipate heat from the energy storage converter, and sharing a fan with the liquid cooling module to cool the second condenser, components such as pumps, heat exchangers, and valves can be eliminated, without occupying the overall power, thereby improving system efficiency, reducing system cost, and reducing the overall size of the machine. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of an integrated energy storage device provided in an embodiment of this application;

[0016] Figure 2 This is a schematic diagram of a heat dissipation system provided in an embodiment of this application;

[0017] Figure 3This is a schematic diagram of the heat flow direction of a heat dissipation system provided in an embodiment of this application;

[0018] Figure 4 This is a schematic diagram of another heat dissipation system provided in an embodiment of this application. Detailed Implementation

[0019] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0020] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such terms can be used interchangeably where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0021] The following description, in conjunction with the accompanying drawings, details a heat dissipation system and an integrated energy storage unit provided in this application through specific embodiments and application scenarios.

[0022] like Figures 1 to 4 As shown in the embodiment of this application, a heat dissipation system is provided. The heat dissipation system is applied to an integrated energy storage device 10. The integrated energy storage device 10 includes a battery module 13 and an energy storage converter. The battery module 13 may include a plurality of battery cells. The battery module 13 is electrically connected to the energy storage converter. The energy storage converter converts the DC power supplied by the battery module 13 into AC power and outputs it to the power grid or load. Alternatively, the energy storage converter converts the AC power on the power grid into DC power and then charges the battery module 13.

[0023] The heat dissipation system includes a liquid cooling module, a thermosiphon radiator, and a fan 40. The liquid cooling module includes liquid cooling pipes and a first condenser 21. The liquid cooling pipes are connected to the battery module 13 and the first condenser 21, respectively. The coolant in the liquid cooling pipes absorbs the heat in the battery module 13 and transfers it to the first condenser 21. After being cooled by the first condenser 21, the coolant flows back to the battery module 13, thus achieving heat dissipation for the battery module 13.

[0024] The thermosiphon radiator includes an evaporator 31 and a second condenser 32. The evaporator 31 is connected to the second condenser 32 through a circulation pipe to form a circulation loop, utilizing the thermosiphon effect to achieve the circulation of the medium between the evaporator 31 and the second condenser 32. Specifically, the evaporator 31 is in thermal contact with the heating unit of the energy storage converter, while the second condenser 32 can be located in the same air duct as the first condenser 21 of the liquid cooling module. The medium in the evaporator 31 absorbs heat from the heating unit of the energy storage converter, undergoes a phase change, and enters the second condenser 32 through the circulation pipe. The second condenser 32 releases the heat, and after cooling, it flows back to the evaporator 31 through the circulation pipe, thus achieving heat dissipation inside the energy storage converter. Therefore, the heat dissipation of the energy storage converter does not require the liquid cooling module to provide power to drive the coolant circulation for heat transfer. Instead, it directly relies on the thermosiphon effect of the medium in the hot red flag radiator to transfer heat from the energy storage converter to the second condenser 32. This improves system efficiency, eliminates the need for pumps, pipelines, valves and other components, reduces system costs, and also improves system reliability (pumps and other components require regular maintenance).

[0025] Furthermore, in this embodiment, the first condenser 21 and the second condenser 32 share a fan 40 for cooling. The fan 40 can be a blower fan or an exhaust fan; this application does not make a specific limitation. The first condenser 21 and the second condenser 32 can be located in the same air duct, that is, under the action of the fan 40, air blows over both the first condenser 21 and the second condenser 32. Thus, both can be cooled simultaneously by a single fan 40, further reducing system costs and saving cabinet space.

[0026] In some embodiments, the heat-generating unit in the energy storage converter can be a power device, such as an IGBT, or other high-heat-generating devices; this application does not make any specific limitations.

[0027] In some embodiments, the evaporator 31 of the thermosiphon radiator is positioned at a lower height than the second condenser 32 to change the flow of the medium between the two.

[0028] like Figure 2 , Figure 3As shown, in some embodiments, the liquid cooling heat dissipation pipeline includes a refrigerant pipeline, a coolant pipeline, and a heat exchanger 22. The refrigerant pipeline is connected to the first heat exchange side of both the first condenser 21 and the heat exchanger 22 via pipes. The refrigerant pipeline includes a first power component 23, which drives the refrigerant in the refrigerant pipeline to circulate between the first condenser 21 and the heat exchanger 22. The coolant pipeline is connected to the second heat exchange side of both the battery module 13 and the heat exchanger 22 via pipes. The coolant pipeline includes a second power component 24, which drives the coolant in the coolant pipeline to circulate between the battery module and the heat exchanger 22.

[0029] Therefore, the working principle / process of the above liquid cooling heat dissipation module is roughly as follows:

[0030] The refrigerant in the refrigerant pipeline absorbs heat on the first heat exchange side of the heat exchanger 22. Under the action of the first power component 23, the refrigerant, after absorbing heat, flows to the first condenser 21, where it dissipates the heat into the air, i.e., is cooled by air blowing by the fan 40. The cooled refrigerant then returns to the first heat exchange side of the heat exchanger 22, thus repeating the cycle. Meanwhile, the coolant in the coolant pipeline absorbs heat in the battery module 13. Under the action of the second power component 24, the coolant, after absorbing heat, flows to the second heat exchange side of the heat exchanger 22. Through the heat exchange action of the heat exchanger 22, the heat from the second heat exchange side is exchanged to the first heat exchange side. The cooled coolant then returns to the battery module 13, thus repeating the cycle.

[0031] In some embodiments, the heat exchanger 22 is a plate heat exchanger 22.

[0032] In some embodiments, the heat exchanger 22 shares the fan 40 with the first condenser 21 and the second condenser 32, that is, the three are set in the same air duct to make full use of the air cooling effect of the fan 40.

[0033] In some embodiments, the first power component 23 is a compressor, which performs work on the refrigerant to achieve a cooling effect. The second power component 24 can be a pump to provide power for the circulation of the coolant.

[0034] like Figure 4As shown, in other embodiments, the liquid cooling heat dissipation pipeline includes a third power component 25, which drives the coolant in the liquid cooling heat dissipation pipeline to circulate between the first condenser 21 and the battery module 13. That is, compared with the above embodiments, the first condenser 21 and the battery module 13 are directly connected through the liquid cooling heat dissipation pipeline in this embodiment, without the need for an additional heat exchanger 22 for heat exchange. This eliminates the need for components such as the heat exchanger 22 and the pump, thereby further improving system efficiency and reducing system costs.

[0035] In some embodiments, the third power component 25 is a compressor, which performs work on the coolant (i.e., refrigerant) in the liquid cooling heat dissipation pipeline to achieve a cooling effect, and further performs air cooling heat dissipation through the first condenser 21.

[0036] In some embodiments, the liquid cooling heat dissipation pipeline also includes a three-way valve 26. The first and second ports of the three-way valve 26 are connected in series in the connecting pipeline between the battery module 13 and the third power unit 25, while the third port of the three-way valve 26 is connected to the pipeline on the side of the third power unit 25 away from the three-way valve 26 via a parallel pipeline. Thus, by adding a three-way valve 26 at the location of the third power unit 25, when the external ambient temperature is lower than the temperature required to be maintained by the battery, the compressor can be "short-circuited." That is, the coolant in the liquid cooling heat dissipation pipeline is directly transported from the third port of the three-way valve 26 to the side of the third power unit 25 away from the three-way valve 26 via the parallel pipeline. In other words, the coolant no longer passes through the third power unit 25, so that the circulation loop can circulate heat dissipation by thermosiphon. That is, the coolant absorbs the heat in the battery module 13, and then is transported to the first condenser 21 via the three-way valve 26 and the parallel pipeline, where the fan 40 blows air to carry away the heat.

[0037] In some embodiments, the liquid cooling module further includes a heater 27 disposed on the liquid cooling pipeline, which is used to heat the coolant in the liquid cooling pipeline. When the ambient temperature is too low, in order to avoid the battery module 13 from becoming too cold due to extreme low temperature, the coolant can be heated by the heater 27, thereby ensuring that the battery module 13 maintains a certain temperature.

[0038] In summary, in this embodiment, by using a thermosiphon radiator to dissipate heat from the energy storage converter, and sharing a fan 40 with the liquid cooling module to cool the second condenser 32, components such as pumps, heat exchangers 22, and valves can be eliminated, without occupying the overall power, thereby improving system efficiency, reducing system cost, and reducing the overall size of the machine.

[0039] A second aspect of this application also provides an integrated energy storage device 10, which includes a battery module 13, an energy storage converter, and a heat dissipation system as described in the above embodiments.

[0040] In this embodiment, the heat dissipation system includes a liquid-cooled heat dissipation module, a thermosiphon radiator, and a fan 40. The liquid-cooled heat dissipation module includes liquid-cooled heat dissipation pipes and a first condenser 21. The liquid-cooled heat dissipation pipes are connected to the battery module 13 and the first condenser 21, respectively. The thermosiphon radiator includes an evaporator 31 and a second condenser 32. The evaporator 31 is connected to the second condenser 32 through a circulation pipe to form a circulation loop. The evaporator 31 is in thermal contact with the heating unit of the energy storage converter. The first condenser 21 and the second condenser 32 share the fan 40 for cooling. The liquid-cooled heat dissipation module can dissipate heat from the battery module 13 in the integrated energy storage unit 10, and the thermosiphon radiator can dissipate heat from the energy storage converter in the integrated energy storage unit 10.

[0041] The heat dissipation system in this application embodiment has the corresponding technical features of any of the above embodiments and can achieve the same technical effect. To avoid repetition, it will not be described again here.

[0042] In some embodiments, the integrated energy storage unit 10 also includes a body, which includes a power compartment 11 for housing the energy storage converter. The power compartment 11 is internally divided into an upper cavity and a lower cavity. The fan 40 of the heat dissipation system, the first condenser 21, and the second condenser 32 are all located in the upper cavity, forming an air duct. Thus, the fan 40 can simultaneously provide air cooling for the first condenser 21 and the second condenser 32. The energy storage converter includes a circuit board and power devices mounted on the circuit board. The circuit board and power devices are both located in the lower cavity, and the power devices are thermally connected to the evaporator 31 of the thermosiphon radiator.

[0043] In some embodiments, the side wall of the power compartment 11 is provided with an air outlet, which is connected to the upper cavity, so that the variable fan 40 can exhaust the heat outside the energy storage unit 10.

[0044] In some embodiments, the heat exchanger 22 is located in the upper cavity and shares a fan 40 with the first condenser 21 and the second condenser 32, further reducing the overall volume of the machine.

[0045] In some embodiments, the energy storage converter also includes a reactor electrically connected to the circuit board. The reactor is located in the upper cavity, so that the fan 40 can be used to further cool the reactor and further reduce the overall size of the unit.

[0046] In some embodiments, the housing also includes a battery compartment 12 for housing the battery module 13, located above the power compartment 11. That is, the battery module 13 is placed inside the battery compartment 12, while the energy storage converter is located inside the power compartment 11, achieving separation between the two. The number of battery compartments 12 can be one or more, depending on actual needs.

[0047] In summary, in this embodiment, by using a thermosiphon radiator to dissipate heat from the energy storage converter, and sharing a fan with the liquid cooling module to cool the second condenser, components such as pumps, heat exchangers, and valves can be eliminated, without occupying the overall power, thereby improving system efficiency, reducing system cost, and reducing the overall size of the machine.

[0048] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, it should be noted that the scope of the methods and apparatuses in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0049] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A heat dissipation system, characterized in that, This invention relates to an integrated energy storage unit, which includes a battery module and an energy storage converter. The cooling system includes a liquid-cooled heat dissipation module, a thermosiphon radiator, and a fan. The liquid-cooled heat dissipation module includes liquid-cooled heat dissipation pipes and a first condenser, with the liquid-cooled heat dissipation pipes connected to both the battery module and the first condenser. The thermosiphon radiator includes an evaporator and a second condenser, with the evaporator connected to the second condenser via a circulation pipe to form a circulation loop. The evaporator is in thermal contact with the heating element of the energy storage converter. The first condenser and the second condenser share the fan for cooling.

2. The heat dissipation system according to claim 1, characterized in that, The liquid cooling heat dissipation pipeline includes a refrigerant pipeline, a coolant pipeline, and a heat exchanger. The refrigerant pipeline is connected to the first heat exchange side of the first condenser and the heat exchanger, respectively. The refrigerant pipeline includes a first power component for driving the refrigerant in the refrigerant pipeline to circulate between the first condenser and the heat exchanger. The coolant pipeline is connected to the second heat exchange side of the battery module and the heat exchanger, respectively. The coolant pipeline includes a second power component for driving the coolant in the coolant pipeline to circulate between the battery module and the heat exchanger.

3. The heat dissipation system according to claim 2, characterized in that, The first power component is a compressor, and the second power component is a pump.

4. The heat dissipation system according to claim 1, characterized in that, The liquid cooling heat dissipation pipeline includes a third power component, which is used to drive the coolant in the liquid cooling heat dissipation pipeline to circulate between the first condenser and the battery module.

5. The heat dissipation system according to claim 4, characterized in that, The liquid cooling heat dissipation pipeline also includes a three-way valve. The first and second valve ports of the three-way valve are connected in series in the connecting pipeline between the battery module and the third power component. The third valve port of the three-way valve is connected to the pipeline on the side of the third power component away from the three-way valve through a parallel pipeline.

6. The heat dissipation system according to claim 1, characterized in that, The liquid cooling heat dissipation module also includes a heater disposed on the liquid cooling heat dissipation pipeline, the heater being used to heat the coolant in the liquid cooling heat dissipation pipeline.

7. An integrated energy storage unit, characterized in that, It includes a battery module, an energy storage converter, and a heat dissipation system as described in any one of claims 1-6.

8. The integrated energy storage unit according to claim 7, characterized in that, The integrated energy storage unit also includes a body, which includes a power compartment for housing the energy storage converter. The power compartment is divided into an upper cavity and a lower cavity. The fan, first condenser, and second condenser of the heat dissipation system are all located in the upper cavity. The energy storage converter includes a circuit board and power devices mounted on the circuit board. The circuit board and the power devices are all located in the lower cavity. The power devices are thermally connected to the evaporator of the thermosiphon radiator.

9. The integrated energy storage unit according to claim 8, characterized in that, The energy storage converter also includes a reactor, which is electrically connected to the circuit board and is disposed in the upper cavity.

10. The integrated energy storage unit according to claim 8, characterized in that, The body also includes a battery compartment for housing the battery module, the battery compartment being located above the power compartment.

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