CN116394786A - Thermal management device, energy storage equipment and control method - Google Patents
Thermal management device, energy storage equipment and control method Download PDFInfo
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- CN116394786A CN116394786A CN202310615263.2A CN202310615263A CN116394786A CN 116394786 A CN116394786 A CN 116394786A CN 202310615263 A CN202310615263 A CN 202310615263A CN 116394786 A CN116394786 A CN 116394786A
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- 238000004146 energy storage Methods 0.000 title claims abstract description 23
- 238000000034 method Methods 0.000 title claims abstract description 17
- 230000017525 heat dissipation Effects 0.000 claims abstract description 64
- 238000005057 refrigeration Methods 0.000 claims abstract description 40
- 239000000110 cooling liquid Substances 0.000 claims description 61
- 238000001816 cooling Methods 0.000 claims description 47
- 239000003507 refrigerant Substances 0.000 claims description 44
- 239000007788 liquid Substances 0.000 claims description 43
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 14
- 238000004891 communication Methods 0.000 claims description 10
- 230000001105 regulatory effect Effects 0.000 claims description 8
- 230000006698 induction Effects 0.000 claims description 6
- 230000033228 biological regulation Effects 0.000 claims description 3
- 238000001704 evaporation Methods 0.000 abstract description 13
- 230000008020 evaporation Effects 0.000 abstract description 13
- 238000005265 energy consumption Methods 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 3
- 239000002826 coolant Substances 0.000 description 10
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- PXBRQCKWGAHEHS-UHFFFAOYSA-N dichlorodifluoromethane Chemical compound FC(F)(Cl)Cl PXBRQCKWGAHEHS-UHFFFAOYSA-N 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- LVGUZGTVOIAKKC-UHFFFAOYSA-N 1,1,1,2-tetrafluoroethane Chemical compound FCC(F)(F)F LVGUZGTVOIAKKC-UHFFFAOYSA-N 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 235000019404 dichlorodifluoromethane Nutrition 0.000 description 1
- 238000002637 fluid replacement therapy Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
- B60L53/30—Constructional details of charging stations
- B60L53/302—Cooling of charging equipment
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
The application provides a thermal management device, energy storage equipment and control method, the thermal management device includes: the first heat dissipation circulation loop is provided with a first heat exchange device and is used for dissipating heat of a first device to be dissipated; the second heat dissipation circulation loop is provided with a second heat exchange device and is used for dissipating heat of a second device to be dissipated; and the refrigeration circulation loop exchanges heat with the first heat dissipation circulation loop and the second heat dissipation circulation loop through the first heat exchange device and the second heat exchange device respectively, and the refrigeration circulation loop is provided with a compressor, wherein the compressor forms a first refrigeration circulation loop with the first heat exchange device through the first air suction port and the air outlet, and forms a second refrigeration circulation loop with the second heat exchange device through the second air suction port and the air outlet. The heat dissipation device has the advantages that the heat dissipation efficiency of different heat dissipation devices to be subjected to heat dissipation is improved, the overall energy consumption of the heat management device is reduced, the refrigerating effect of single machine double evaporation temperature is realized, the structural complexity of the heat management device is reduced, and the cost is saved.
Description
Technical Field
The application relates to the technical field of thermal management devices, in particular to a thermal management device, energy storage equipment and a control method.
Background
The heat management device comprises a plurality of heat dissipation units so as to meet different requirements of the heat dissipation devices to heat dissipation temperatures, for example, the energy storage battery and the inverter in the energy storage power station need to dissipate heat at different heat dissipation temperatures, and therefore different heat dissipation units are required to be arranged in the energy storage power station to dissipate heat of the energy storage battery and the inverter respectively.
In the process of implementing the present invention, the inventor finds that at least the following problems exist in the prior art:
the existing thermal management device needs to be provided with a plurality of different heat dissipation units, so that the plurality of heat dissipation units not only can increase the overall energy consumption of the device, but also can make the structure of the device relatively complex, and increase the cost.
Disclosure of Invention
The application provides a heat management device, energy storage equipment and a control method, which are used for solving the problems of high energy consumption and complex structure of the heat management device aiming at different heat dissipation devices in the prior art.
A first aspect of the present application provides a thermal management device comprising:
the first heat dissipation circulation loop is provided with a first heat exchange device and is used for dissipating heat of a first device to be dissipated;
the second heat dissipation circulation loop is provided with a second heat exchange device and is used for dissipating heat of a second device to be dissipated, wherein the first device to be dissipated and the second device to be dissipated have a temperature difference;
and the refrigeration circulation loop exchanges heat with the first circulation loop and the second circulation loop through the first heat exchange device and the second heat exchange device respectively, the refrigeration circulation loop is provided with a compressor, the compressor is provided with a first air suction port, a second air suction port and an air outlet, the compressor forms the first refrigeration circulation loop with the first heat exchange device through the first air suction port and the air outlet, and the compressor forms the second refrigeration circulation loop with the second heat exchange device through the second air suction port and the air outlet.
Optionally, the temperature of the first device to be cooled is smaller than that of the second device to be cooled, and the first refrigeration cycle is provided with a first adjusting element for adjusting the flow of the refrigerant entering the first heat exchange device;
the second refrigeration cycle is provided with: the second adjusting element is used for adjusting the flow rate of the refrigerant entering the second heat exchange device or the capillary tube is used for limiting the flow rate of the refrigerant entering the second heat exchange device.
Optionally, the refrigeration cycle loop is further provided with a condenser, the air outlet is communicated with the condenser, and the condenser is respectively communicated with the first heat exchange device and the second heat exchange device.
Optionally, the first heat dissipation circulation loop is provided with a first cooling component for dissipating heat of the first device to be dissipated, and the first cooling component is communicated with the first heat exchange device through a first liquid outlet pipe and a first liquid inlet pipe;
the second cooling part is communicated with the second heat exchange device through a second liquid outlet pipe and a second liquid inlet pipe.
Optionally, the first liquid outlet pipe, the first liquid inlet pipe, the second liquid outlet pipe and the second liquid inlet pipe are all provided with temperature sensors and/or pressure sensors.
Optionally, the thermal management device further comprises two circulating pumps and two expansion water tanks, one end of one circulating pump is communicated with the first liquid outlet pipe, the other end of the circulating pump is communicated with the first heat exchange device, and one expansion water tank is communicated with the first liquid outlet pipe;
one end of the other circulating pump is communicated with the second liquid outlet pipe, the other end of the other circulating pump is communicated with the second heat exchange device, and the other expansion water tank is communicated with the second liquid outlet pipe.
Optionally, the first liquid outlet pipe and the second liquid outlet pipe are both provided with a filter.
Optionally, the temperature of the first heat-dissipating device to be cooled is lower than that of the second heat-dissipating device to be cooled, and the thermal management device further comprises a heater, one end of which is communicated with the first heat exchange device, and the other end of which is communicated with the first liquid inlet pipe.
A second aspect of the present application provides an energy storage device comprising the thermal management apparatus described above.
A third aspect of the present application provides a control method, which is applied to the thermal management device in the embodiment of the first aspect or the energy storage device in the embodiment of the second aspect, where the first heat dissipation circulation loop is provided with a first cooling component for dissipating heat from a first device to be dissipated, and the second heat dissipation circulation loop is provided with a second cooling component for dissipating heat from a second device to be dissipated, and during an operation process of the thermal management device, the control method includes:
s1, detecting the actual temperature T1 of the cooling liquid at the inlet of the first cooling component and the actual temperature T2 of the cooling liquid at the inlet of the second cooling component;
s2, judging whether T1 meets K1-a, T1 and K1+a, judging whether T2 meets K2-b, T2 and K2+b, wherein K1 is a first temperature preset value, a is a first temperature precision value, K2 is a second temperature preset value, b is a second temperature precision value, when T1 and T2 are both in a preset interval range, regulation is not performed, and when at least one of T1 and T2 is not in the preset interval range, the next step is performed;
s3, when T1 is less than K1-a or when T2 is less than K2-b and K1-a is less than or equal to T1 and less than or equal to K1+a, reducing the frequency of the compressor, and then repeating S1 and S2;
when T1 > K1+a or when T2 > K2+b and K1-a.ltoreq.T1.ltoreq.K1+a, the frequency of the compressor is increased, and then S1 and S2 are repeated.
The application has at least the following beneficial effects:
according to the heat management device, the energy storage equipment and the control method, the cooling liquid of the first heat dissipation circulation loop and the cooling liquid of the second heat dissipation circulation loop can respectively exchange heat with the refrigerant in the first heat exchange device and the second heat exchange device, and the refrigerant evaporates and absorbs heat of the cooling liquid, namely the heat management device provided by the embodiment adopts the technical scheme of double evaporation temperatures, so that the cooling liquid of the first heat dissipation circulation loop and the cooling liquid of the second heat dissipation circulation loop respectively exchange heat with the first device to be cooled and the second device to be cooled at optimal temperatures, the heat dissipation efficiency of the first device to be cooled and the second device to be cooled is improved, and the overall energy consumption of the heat management device is reduced; and the compressor in this embodiment is provided with two low pressure cylinders that communicate with first induction port and second induction port respectively, through the discharge capacity ratio of two low pressure cylinders, realizes the refrigeration effect of single unit double evaporation temperature, and then need not to adopt a plurality of compressors, has both reduced the structure complexity of thermal management device, has saved the cost again.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.
Drawings
FIG. 1 is a schematic illustration of a thermal management device provided herein in one embodiment;
FIG. 2 is a schematic illustration of a thermal management device provided herein in another embodiment;
fig. 3 is a step diagram of a control method provided in the present application.
Reference numerals:
10-a refrigeration cycle;
11-a compressor;
111-an air outlet;
112-a first suction port;
113-a second suction port;
12-a condenser;
131-a first adjusting element;
132-a second adjustment element;
141-a first heat exchange device;
142-a second heat exchange device;
15-capillary;
211-a first heat dissipation circulation loop;
212-a second heat dissipation circulation loop;
221-a first cooling member;
222-a second cooling component;
231-a first outlet pipe;
232-a first liquid inlet pipe;
233-a second outlet pipe;
234-a second inlet pipe;
24-a temperature sensor;
25-a pressure sensor;
26-a circulation pump;
27-an expansion tank;
28-a filter;
29-heater.
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the application and together with the description, serve to explain the principles of the application.
Detailed Description
For a better understanding of the technical solutions of the present application, embodiments of the present application are described in detail below with reference to the accompanying drawings.
It should be understood that the described embodiments are merely some, but not all, of the embodiments of the present application. All other embodiments, based on the embodiments herein, which would be apparent to one of ordinary skill in the art without making any inventive effort, are intended to be within the scope of the present application.
The terminology used in the embodiments of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in this application and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It should be understood that the term "and/or" as used herein is merely one relationship describing the association of the associated objects, meaning that there may be three relationships, e.g., a and/or B, may represent: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.
It should be noted that, the terms "upper", "lower", "left", "right", and the like in the embodiments of the present application are described in terms of the angles shown in the drawings, and should not be construed as limiting the embodiments of the present application. In the context of this document, it will also be understood that when an element is referred to as being "on" or "under" another element, it can be directly on the other element or be indirectly on the other element through intervening elements.
An embodiment of the present application provides a thermal management device, as shown in fig. 1-2, including: the first heat dissipation circulation loop 211 provided with the first heat exchange device 141 is used for dissipating heat of the first device to be dissipated; the second heat dissipation circulation loop 212 provided with the second heat exchange device 142 is used for dissipating heat of the second device to be dissipated, wherein a temperature difference exists between the first device to be dissipated and the second device to be dissipated; the refrigeration cycle 10 exchanges heat with the first circulation circuit 211 and the second circulation circuit 212 through the first heat exchange device 141 and the second heat exchange device 142, respectively, the refrigeration cycle 10 is provided with a compressor 11, the compressor 11 is provided with a first air suction port 112, a second air suction port 113 and an air outlet port 111, wherein the compressor 11 forms the first refrigeration cycle with the first heat exchange device 141 through the first air suction port 112 and the air outlet port 111, and the compressor 11 forms the second refrigeration cycle with the second heat exchange device 142 through the second air suction port 113 and the air outlet port 111.
The compressor 11 is capable of driving a refrigerant to flow through the first refrigeration cycle and the second refrigeration cycle; in the first heat exchange device 141, the refrigerant exchanges heat with the cooling liquid in the first heat dissipation circulation loop 211, so that the cooling liquid is cooled, and the cooled cooling liquid dissipates heat to the first device to be cooled; in the second heat exchange device 142, the refrigerant exchanges heat with the cooling liquid in the second heat dissipation circulation loop 212, so that the cooling liquid cools down, and the cooled cooling liquid dissipates heat of the second heat dissipation device.
The refrigerant is a medium substance in various heat engines for completing energy conversion, which absorbs heat of the cooled object at low temperature and then transfers the heat to cooling water or air at higher temperature, and can be ammonia (code: R717), freon-12 (code: R12), tetrafluoroethane (code: R134 a) and the like.
The cooling liquid may be water or oil.
In this embodiment, the cooling liquid of the first heat dissipation circulation loop 211 and the cooling liquid of the second heat dissipation circulation loop 212 can exchange heat with the refrigerant in the first heat exchange device 141 and the second heat exchange device 142 respectively, and the refrigerant evaporates to absorb the heat of the cooling liquid, that is, the heat management device provided in this embodiment adopts a technical scheme of double evaporation temperatures, so that the cooling liquid of the first heat dissipation circulation loop 211 and the cooling liquid of the second heat dissipation circulation loop 212 exchange heat with the first device to be cooled and the second device to be cooled respectively at optimal temperatures, the heat dissipation efficiency of the first device to be cooled and the second device to be cooled is improved, and the overall energy consumption of the heat management device is reduced; in addition, the compressor 11 in the embodiment is provided with two low-pressure cylinders respectively communicated with the first air suction port 112 and the second air suction port 113, and the refrigerating effect of single machine double evaporation temperature is realized through the displacement ratio of the two low-pressure cylinders, so that a plurality of compressors 11 are not needed, the structural complexity of the thermal management device is reduced, and the cost is saved.
The heat management device provided by the embodiment can simultaneously radiate heat of the power battery and the inverter of the energy storage power station, can simultaneously meet the temperature control requirements of the power battery and the inverter, and improves the operation reliability of the whole energy storage power station.
For example, the first heat dissipation device to be used is a power battery, the second heat dissipation device to be used is an inverter, and the inverter can withstand higher temperature compared with the power battery, so that the heat dissipation temperature required by the inverter is higher than that required by the power battery, and therefore, the heat exchange amount of the cooling liquid and the cooling medium in the second heat exchange device 142 can be controlled to be smaller than that in the first heat exchange device 141, so that the temperature control requirements of the power battery and the inverter can be met simultaneously.
Wherein, the first heat exchanging device 141 and the second heat exchanging device 142 may be plate heat exchangers. The plate heat exchanger has the characteristics of high heat exchange efficiency, small heat loss, compact structure, long service life and the like.
Specifically, the refrigeration cycle 10 is further provided with a condenser 12, the air outlet 111 communicates with the condenser 12, and the condenser 12 communicates with the first heat exchanging device 141 and the second heat exchanging device 142, respectively.
The high-temperature and high-pressure refrigerant flows out through the air outlet 111 of the compressor 11 and then flows into the condenser 12; in the condenser 12, the high-temperature and high-pressure refrigerant is condensed into a medium-temperature and high-pressure refrigerant; the medium-temperature and high-pressure refrigerant respectively flows into the first heat exchange device 141 and the second heat exchange device 142 after being throttled and depressurized.
In one embodiment, as shown in fig. 1, the first refrigeration cycle is provided with a first adjusting element 131 for adjusting the flow rate of the refrigerant entering the first heat exchanging arrangement 141; the second refrigeration cycle is provided with a second regulating element 132 for regulating the flow of refrigerant into the second heat exchange device 142.
In the embodiment, the opening degree of the first adjusting element 131 and the second adjusting element 132 is adjusted to adjust the flow rate of the refrigerant flowing into the first heat exchange device 141 and the second heat exchange device 142, so as to respectively adjust the temperature of the cooling liquid in the first heat dissipation circulation loop 211 and the second heat dissipation circulation loop 212, so as to meet the temperature control requirements of the first heat dissipation device and the second heat dissipation device with different temperatures; and the load change of the refrigerants in the first heat exchange device 141 and the second heat exchange device 142 can be adjusted, so that dynamic balance in the operation process of the heat management device is realized.
Specifically, the first and second adjustment elements 131 and 132 are provided as throttle elements, which are electronic expansion valves or thermal expansion valves. The throttling element can throttle and reduce pressure on the refrigerant.
In another embodiment, the temperature of the first device to be cooled is lower than that of the second device to be cooled, as shown in fig. 2, the first refrigeration cycle is provided with a first adjusting element 131 for adjusting the flow of the refrigerant entering the first heat exchanging device 141; the second refrigeration cycle is provided with a capillary tube 15 for defining the flow of refrigerant into the second heat exchange device 142.
In this embodiment, since the temperature of the first heat-dissipating device is smaller than that of the second heat-dissipating device, the temperature of the cooling liquid in the first heat-dissipating circulation loop 211 needs to be lower than that of the cooling liquid in the second heat-dissipating circulation loop 212, and therefore the first adjusting element 131 is disposed in the first refrigeration circulation loop, the capillary tube 15 is disposed in the second refrigeration circulation loop, the inner diameter of the capillary tube 15 cannot be adjusted, and the opening of the first adjusting element 131 is adjusted, so that the flow rate of the cooling medium flowing into the first heat-exchanging device 141 is greater than that flowing into the second heat-exchanging device 142, and the temperature of the cooling liquid in the first heat-dissipating circulation loop 211 after being cooled by the first heat-exchanging device 141 is lower than that of the cooling liquid in the second heat-dissipating circulation loop 212 after being cooled by the second heat-exchanging device 142.
By the arrangement, the second refrigeration cycle loop does not need to be provided with an adjusting element, so that the number of parts of the whole thermal management device is reduced.
Specifically, the first adjusting element 131 is provided as a throttling element, which is an electronic expansion valve or a thermal expansion valve. The throttling element can throttle and reduce pressure on the refrigerant.
According to some embodiments of the present application, the first heat dissipation circulation loop 211 is provided with a first cooling component 221 for dissipating heat from the first device to be heat-dissipated, and the first cooling component 221 is communicated with the first heat exchanging device 141 through a first liquid outlet pipe 231 and a first liquid inlet pipe 232; the second heat dissipation circulation loop 212 is provided with a second cooling part 222 for dissipating heat of the second heat dissipation device to be dissipated, and the second cooling part 222 is communicated with the second heat exchange device 142 through a second liquid outlet pipe 233 and a second liquid inlet pipe 234.
The cooling liquid having completed heat exchange in the first heat exchanging device 141 flows from the first liquid inlet pipe 232 into the first cooling part 221, and in the first cooling part 221, the cooling liquid exchanges heat with the first device to be cooled; the cooling liquid after heat exchange flows into the first heat exchanging device 141 from the first liquid outlet pipe 231, and is cooled again.
The cooling liquid having completed heat exchange in the second heat exchange device 142 flows from the second liquid inlet pipe 234 into the second cooling part 222, and in the second cooling part 222, the cooling liquid exchanges heat with the second heat to-be-dissipated device; the cooling liquid after heat exchange flows into the second heat exchange device 142 from the second liquid outlet pipe 233, and is cooled again.
The first cooling member 221 and the second cooling member 222 may be liquid cooling plates, or other forms of cooling members.
In a specific embodiment, the first liquid outlet pipe 231, the first liquid inlet pipe 232, the second liquid outlet pipe 233 and the second liquid inlet pipe 234 are all provided with temperature sensors 24.
In this embodiment, by setting the temperature sensor 24, the actual temperature of the cooling liquid before entering the first cooling part 221 and the actual temperature of the cooling liquid after exiting the first cooling part 221, and the actual temperature of the cooling liquid before entering the second cooling part 222 and the actual temperature of the cooling liquid after exiting the second cooling part 222 can be detected, and the detected actual values are transmitted to the control system, and the control system compares the actual values with the preset interval range values to see whether the cooling temperature of the cooling liquid reaches the standard.
In addition, the first liquid outlet pipe 231, the first liquid inlet pipe 232, the second liquid outlet pipe 233 and the second liquid inlet pipe 234 are provided with pressure sensors 25.
In this embodiment, by setting the pressure sensor 25, the actual pressure of the cooling liquid before entering the first cooling component 221 and the actual pressure of the cooling liquid after exiting the first cooling component 221 can be detected, and the actual pressure of the cooling liquid before entering the second cooling component 222 and the actual pressure of the cooling liquid after exiting the second cooling component 222 can be transmitted to the control system, and the control system compares the detected actual value with the preset interval range value to see whether the pressure of the cooling liquid reaches the standard or not, so as to prevent the condition that the pipeline is blocked or burst due to the overlarge pressure.
Specifically, the thermal management device further includes two circulation pumps 26 and two expansion tanks 27, one end of one circulation pump 26 is communicated with the first liquid outlet pipe 231, the other end is communicated with the first heat exchange device 141, and one expansion tank 27 is communicated with the first liquid outlet pipe 231; one end of the other circulation pump 26 is communicated with the second liquid outlet pipe 233, the other end is communicated with the second heat exchange device 142, and the other expansion tank 27 is communicated with the second liquid outlet pipe 233.
The circulation pump 26 is a driving element for driving the coolant to flow in the first heat dissipation circulation loop 211 and the second heat dissipation circulation loop 212.
The expansion tank 27 is provided to realize a constant pressure function, reliable operation of the circulation pump 26, and a fluid replacement function.
Due to the expansion and contraction of water, when the temperature of the hot water increases, the water volume in the circulation loop increases, and when the expansion amount of the part containing water is not present, the water pressure in the circulation loop increases, so that the normal operation is affected, and at the moment, the expansion water tank 27 can contain the water expansion amount of the circulation loop, so that the water pressure fluctuation caused by the expansion of the water can be reduced, and the safety and reliability of the operation of the circulation loop are improved.
In order to reduce the risk of too much coolant flowing into the circulation pump 26, which adversely affects the operation of the circulation pump 26, the thermal management device further comprises a filter 28, and both the first outlet pipe 231 and the second outlet pipe 233 are provided with a filter 28.
In some embodiments of the present application, the temperature of the first device to be cooled is less than that of the second device to be cooled, and the thermal management device further includes a heater 29, where one end of the heater 29 is in communication with the first heat exchange device 141, and the other end is in communication with the first liquid inlet pipe 232.
In this embodiment, since the temperature of the first device to be cooled is lower than that of the second device to be cooled, the temperature of the cooling liquid in the first cooling circulation loop 211 is lower than that of the cooling liquid in the second cooling circulation loop 212, so that the cooling liquid in the first cooling circulation loop 211 is liable to have too low temperature, and the heater 29 can be turned on to heat the cooling liquid at this time, so that the cooling liquid is quickly warmed up, and icing in the pipeline is prevented when the cooling liquid temperature is too low. When the temperature of the coolant is within the preset interval, the heater 29 may be turned off, and the turned-off heater 29 does not heat the coolant.
The second aspect of the embodiments of the present application further provides an energy storage device, where the energy storage device includes the thermal management device described in any one of the embodiments above.
The energy storage equipment can be an energy storage power station or an energy storage cabinet and the like, can be applied to power construction, petrochemical industry, hotels and the like, can store power and supplies power for other equipment and facilities. The first heat-dissipating device and the second heat-dissipating device are two devices in the energy storage device, and by using the above-mentioned thermal management device, the cooling liquid of the first heat-dissipating circulation loop 211 and the cooling liquid of the second heat-dissipating circulation loop 212 can exchange heat with the first heat-dissipating device and the second heat-dissipating device at optimal temperatures respectively, so that the heat-dissipating efficiency of the first heat-dissipating device and the second heat-dissipating device is improved, and the operation reliability of the energy storage device is improved.
The third aspect of the present embodiment further provides a control method, where the thermal management device is the thermal management device according to any one of the above embodiments, the first heat dissipation circulation loop 211 is provided with a first cooling component 221 for dissipating heat from a first device to be dissipated, the second heat dissipation circulation loop 212 is provided with a second cooling component 222 for dissipating heat from a second device to be dissipated, and during operation of the thermal management device, as shown in fig. 3, the control method includes:
s1, detecting the actual temperature T1 of the cooling liquid at the inlet of the first cooling component 221 and the actual temperature T2 of the cooling liquid at the inlet of the second cooling component 222;
s2, judging whether T1 meets K1-a, T1 and K1+a, judging whether T2 meets K2-b, T2 and K2+b, wherein K1 is a first temperature preset value, a is a first temperature precision value, K2 is a second temperature preset value, b is a second temperature precision value, when T1 and T2 are both in a preset interval range, regulation is not performed, and when at least one of T1 and T2 is not in the preset interval range, the next step is performed;
s3, when T1 is less than K1-a or T2 is less than K2-b or T1 is less than K1-a and T2 is less than K2-b, reducing the frequency of the compressor 11, and then repeating S1 and S2;
when T1 > k1+a or when T2 > k2+b or when T1 > k1+a and T2 > k2+b, the frequency of the compressor 11 is increased, and then S1 and S2 are repeated.
When T1 is smaller than K1-a, T2 is smaller than K2-b, or T1 is smaller than K1-a and T2 is smaller than K2-b, it is indicated that the refrigerant flow in the first heat exchange device 141 is too large or the refrigerant flow in the second heat exchange device 142 is too large or the refrigerant flows in the first heat exchange device 141 and the second heat exchange device 142 are both too large, and at this time, the frequency of the compressor 11 can be reduced, so that the refrigerant flow is reduced.
When T1 > k1+a or when T2 > k2+b or when T1 > k1+a and T2 > k2+b, it is indicated that the refrigerant flow rate in the first heat exchanging device 141 is too small or the refrigerant flow rate in the second heat exchanging device 142 is too small or the refrigerant flow rates in both the first heat exchanging device 141 and the second heat exchanging device 142 are too small, at this time, the frequency of the compressor 11 may be raised so that the refrigerant flow rate is increased.
In this embodiment, when one of the actual temperature T1 of the cooling liquid at the inlet of the first cooling component 221 and the actual temperature T2 of the cooling liquid at the inlet of the second cooling component 222 is detected to be not within the preset interval range, the compressor 11 can rapidly respond and make corresponding adjustment, so that the temperature of the cooling liquid can rapidly recover to the respective corresponding preset ranges, and the heat exchange between the cooling liquid of the first heat dissipation circulation loop 211 and the cooling liquid of the second heat dissipation circulation loop 212 and the first heat dissipation device and the second heat dissipation device to be dissipated is realized at the optimal temperature, thereby improving the heat dissipation efficiency of the first heat dissipation device and the second heat dissipation device to be dissipated and reducing the overall energy consumption of the thermal management device.
Specifically, the value range of the first temperature preset value K1 can be 15 ℃ to 21 ℃ and K1 can be 15 ℃, 16 ℃, 17 ℃, 18 ℃, 19 ℃, 20 ℃, 21 ℃ and the like.
The value range of the first temperature precision value a can be 0 < a.ltoreq.5 ℃, and a can be 1 ℃, 2 ℃, 3 ℃, 4 ℃, 5 ℃ and the like.
The second temperature preset value K2 can be in a value range of 35 ℃ to 45 ℃ and K2 can be 35 ℃, 36 ℃, 37 ℃, 38 ℃, 39 ℃, 40 ℃, 41 ℃, 42 ℃, 43 ℃, 44 ℃, 45 ℃ and the like.
The second temperature accuracy value b may be in a range of 0 < b.ltoreq.5℃, and b may be specifically 1 ℃, 2 ℃, 3 ℃, 4 ℃, 5 ℃ or the like.
In a specific embodiment, the first refrigeration cycle loop and the second refrigeration cycle loop are provided with a first adjustment element 131 and a second adjustment element 132, respectively, and step S3 includes:
decreasing the frequency of the compressor 11 when T1 < K1-a or when T2 < K2-b or when T1 < K1-a and T2 < K2-b, adjusting the opening degrees of the first and second adjusting elements 131 and 132, and then repeating S1 and S2;
when T1 > k1+a or when T2 > k2+b or when T1 > k1+a and T2 > k2+b, the frequency of the compressor 11 is raised, the opening degrees of the first and second adjustment elements 131 and 132 are adjusted, and then S1 and S2 are repeated.
The opening degree adjustment of the first adjusting element 131 and the opening degree adjustment of the second adjusting element 132 are dynamic adjustments based on the comparison result between the actual value of the suction superheat degree and the target interval value, which are respectively corresponding.
The temperature of the refrigerant at the first air suction port 112 of the compressor 11 is named as a first suction temperature, the evaporation temperature of the refrigerant in the first heat exchange device 141 is named as a first evaporation temperature, the first suction superheat is equal to the first suction temperature minus the first evaporation temperature, and when the actual value of the first suction superheat is within the first suction superheat target interval value, the heat exchange requirement of the cooling liquid in the first heat dissipation circulation loop and the refrigerant in the first heat exchange device can be satisfied.
The temperature of the refrigerant at the second air suction port 113 of the compressor 11 is named as a second suction temperature, the evaporation temperature of the refrigerant in the second heat exchange device 142 is named as a second evaporation temperature, the second suction superheat is equal to the second suction temperature minus the second evaporation temperature, and when the actual value of the second suction superheat is within the target interval value of the second suction superheat, the heat exchange requirement of the cooling liquid in the second heat dissipation circulation loop and the refrigerant in the second heat exchange device can be met.
During operation of the thermal management device, the control method will be described using the example that T1 < K1-a and T2 > K2+b are detected:
when T1 is less than K1-a, it is indicated that the heat exchange amount between the cooling liquid in the first heat dissipation circulation loop and the refrigerant in the first heat exchange device is too large, the evaporation temperature of the refrigerant in the first heat exchange device is higher, and the temperature of the refrigerant at the first air suction port 112 is lower, so that the actual value of the first air suction superheat is smaller than the minimum value of the target interval value of the first air suction superheat, and at this time, the opening of the first adjusting element 131 can be reduced to increase the actual value of the first air suction superheat; when T2 > k2+b, it is indicated that the heat exchange amount between the coolant in the second heat-dissipating circulation loop and the coolant in the second heat exchange device is too small, the evaporation temperature of the coolant in the second heat exchange device is low, and the temperature of the coolant at the second air intake 113 is high, so that the actual value of the second air intake superheat is greater than the maximum value of the target interval value of the second air intake superheat, and at this time, the opening of the second adjusting element 132 may be increased to reduce the actual value of the second air intake superheat; in this case, in order to adjust T1 and T2 to respective corresponding preset ranges, that is, to adjust the actual value of the first suction superheat and the actual value of the second suction superheat to respective corresponding preset ranges, the frequency of the compressor 11 is reduced to reduce the displacement of the compressor 11, and the opening degree of the first adjusting element 131 is adjusted according to the target interval value of the first suction superheat, and the opening degree of the second adjusting element 132 is adjusted according to the target interval value of the second suction superheat to raise T1, lower T2, and adjust T1 and T2 to respective corresponding preset ranges.
In another specific embodiment, the first refrigeration cycle loop and the second refrigeration cycle loop are provided with a first adjusting element 131 and a capillary tube 15, respectively, and step S3 includes:
decreasing the frequency of the compressor 11 when T1 < K1-a or when T2 < K2-b or when T1 < K1-a and T2 < K2-b, adjusting the opening of the first adjusting element 131, and then repeating S1 and S2;
when T1 > k1+a or when T2 > k2+b or when T1 > k1+a and T2 > k2+b, the frequency of the compressor 11 is raised, the opening degree of the first regulating element 131 is regulated, and then S1 and S2 are repeated.
The opening degree of the first adjusting element 131 is dynamically adjusted according to the comparison result of the actual value of the corresponding suction superheat degree and the target interval value.
The foregoing description is only of the preferred embodiments of the present application and is not intended to limit the same, but rather, various modifications and variations may be made by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.
Claims (10)
1. A thermal management device, comprising:
a first heat-dissipating circulation loop (211) provided with a first heat-exchanging device (141) for dissipating heat from a first device to be heat-dissipated;
a second heat dissipation circulation loop (212) provided with a second heat exchange device (142) for dissipating heat of a second device to be dissipated, wherein the first device to be dissipated and the second device to be dissipated have a temperature difference;
refrigeration cycle circuit (10), refrigeration cycle circuit (10) respectively through first heat transfer device (141) and second heat transfer device (142) with first circulation circuit (211) and second circulation circuit (212) exchange heat, refrigeration cycle circuit (10) are provided with compressor (11), compressor (11) are provided with first induction port (112), second induction port (113) and gas outlet (111), wherein, compressor (11) are through first induction port (112) and gas outlet (111) with first heat transfer device (141) form first refrigeration cycle circuit, compressor (11) are through second induction port (113) and gas outlet (111) with second heat transfer device (142) form second refrigeration cycle circuit.
2. The thermal management device according to claim 1, wherein the first device to be cooled has a temperature lower than that of the second device to be cooled, the first refrigeration cycle being provided with a first regulating element (131) for regulating the flow of refrigerant into the first heat exchange device (141);
the second refrigeration cycle is provided with: a second regulating element (132) for regulating the flow of refrigerant into the second heat exchange device (142) or a capillary tube (15) for limiting the flow of refrigerant into the second heat exchange device (142).
3. The thermal management device according to claim 1 or 2, wherein the refrigeration cycle (10) is further provided with a condenser (12), the air outlet (111) being in communication with the condenser (12), the condenser (12) being in communication with the first heat exchanging means (141) and the second heat exchanging means (142), respectively.
4. A thermal management device according to claim 3, wherein the first heat-dissipating circulation circuit (211) is provided with a first cooling member (221) for dissipating heat from the first device to be heat-dissipated, the first cooling member (221) being in communication with the first heat-exchanging device (141) through a first outlet pipe (231) and a first inlet pipe (232);
the second heat dissipation circulation loop (212) is provided with a second cooling component (222) for dissipating heat of the second heat to-be-dissipated device, and the second cooling component (222) is communicated with the second heat exchange device (142) through a second liquid outlet pipe (233) and a second liquid inlet pipe (234).
5. The thermal management device according to claim 4, wherein the first outlet pipe (231), the first inlet pipe (232), the second outlet pipe (233) and the second inlet pipe (234) are each provided with a temperature sensor (24) and/or a pressure sensor (25).
6. The thermal management device according to claim 4, further comprising two circulation pumps (26) and two expansion tanks (27), one end of one circulation pump (26) being in communication with the first outlet pipe (231) and the other end being in communication with the first heat exchanging device (141), one expansion tank (27) being in communication with the first outlet pipe (231);
one end of the other circulating pump (26) is communicated with the second liquid outlet pipe (233), the other end of the other circulating pump is communicated with the second heat exchange device (142), and the other expansion water tank (27) is communicated with the second liquid outlet pipe (233).
7. The thermal management device according to claim 6, wherein the first outlet pipe (231) and the second outlet pipe (233) are each provided with a filter (28).
8. The thermal management device according to claim 4, wherein the first device to be cooled is at a temperature lower than the second device to be cooled, the thermal management device further comprising a heater (29), one end of the heater (29) being in communication with the first heat exchanging device (141) and the other end being in communication with the first liquid inlet pipe (232).
9. An energy storage device comprising the thermal management apparatus of any one of claims 1-8.
10. A control method, characterized in that it is applied to a thermal management device according to any one of claims 1-8 or to an energy storage apparatus according to claim 9, the first heat-dissipating circulation circuit (211) being provided with a first cooling means (221) for dissipating heat from the first device to be heat-dissipated, the second heat-dissipating circulation circuit (212) being provided with a second cooling means (222) for dissipating heat from the second device to be heat-dissipated, the control method comprising, during operation of the thermal management device:
DD230573I
s1, detecting the actual temperature T1 of the cooling liquid at the inlet of the first cooling component (221) and the actual temperature T2 of the cooling liquid at the inlet of the second cooling component (222);
s2, judging whether T1 meets K1-a, T1 and K1+a, judging whether T2 meets K2-b, T2 and K2+b, wherein K1 is a first temperature preset value, a is a first temperature precision value, K2 is a second temperature preset value, b is a second temperature precision value, when T1 and T2 are both in a preset interval range, regulation is not performed, and when at least one of T1 and T2 is not in the preset interval range, the next step is performed;
s3, when T1 < K1-a or when T2 < K2-b or when T1 < K1-a and T2 < K2-b, reducing the frequency of the compressor (11), and then repeating S1 and S2;
when T1 > K1+a or when T2 > K2+b or when T1 > K1+a and T2 > K2+b, the frequency of the compressor (11) is raised, and then S1 and S2 are repeated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310615263.2A CN116394786A (en) | 2023-05-29 | 2023-05-29 | Thermal management device, energy storage equipment and control method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310615263.2A CN116394786A (en) | 2023-05-29 | 2023-05-29 | Thermal management device, energy storage equipment and control method |
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| CN116394786A true CN116394786A (en) | 2023-07-07 |
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| CN202310615263.2A Pending CN116394786A (en) | 2023-05-29 | 2023-05-29 | Thermal management device, energy storage equipment and control method |
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| Country | Link |
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| CN (1) | CN116394786A (en) |
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