CN117293449A - Refrigerant direct-cooling and direct-heating type heat management system for energy storage cabinet and flow distribution structure of refrigerant direct-cooling and direct-heating type heat management system - Google Patents
Refrigerant direct-cooling and direct-heating type heat management system for energy storage cabinet and flow distribution structure of refrigerant direct-cooling and direct-heating type heat management system Download PDFInfo
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- CN117293449A CN117293449A CN202311587629.6A CN202311587629A CN117293449A CN 117293449 A CN117293449 A CN 117293449A CN 202311587629 A CN202311587629 A CN 202311587629A CN 117293449 A CN117293449 A CN 117293449A
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- 238000001816 cooling Methods 0.000 title claims abstract description 113
- 239000003507 refrigerant Substances 0.000 title claims abstract description 86
- 238000010438 heat treatment Methods 0.000 title claims abstract description 77
- 238000004146 energy storage Methods 0.000 title claims abstract description 36
- 238000009826 distribution Methods 0.000 title claims abstract description 14
- 239000007788 liquid Substances 0.000 claims abstract description 65
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 15
- 230000002457 bidirectional effect Effects 0.000 claims description 6
- 230000000694 effects Effects 0.000 claims description 5
- 230000001105 regulatory effect Effects 0.000 abstract description 6
- 230000008859 change Effects 0.000 abstract description 3
- 238000005452 bending Methods 0.000 description 8
- 230000000712 assembly Effects 0.000 description 7
- 238000000429 assembly Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 239000000110 cooling liquid Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 229910000838 Al alloy Inorganic materials 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000007791 dehumidification Methods 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 230000020169 heat generation Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000009827 uniform distribution Methods 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/655—Solid structures for heat exchange or heat conduction
- H01M10/6556—Solid parts with flow channel passages or pipes for heat exchange
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/61—Types of temperature control
- H01M10/613—Cooling or keeping cold
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/61—Types of temperature control
- H01M10/615—Heating or keeping warm
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/61—Types of temperature control
- H01M10/617—Types of temperature control for achieving uniformity or desired distribution of temperature
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
- H01M10/627—Stationary installations, e.g. power plant buffering or backup power supplies
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/63—Control systems
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
- H01M10/6567—Liquids
- H01M10/6568—Liquids characterised by flow circuits, e.g. loops, located externally to the cells or cell casings
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- 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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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Automation & Control Theory (AREA)
- Secondary Cells (AREA)
Abstract
The patent relates to energy storage battery unit's control by temperature change and thermal management field specifically are refrigerant direct cooling directly-heated type thermal management system and reposition of redundant personnel structure for energy storage rack to the degree of difficulty of the even distribution of direct cooling system refrigerant flow that proposes among the above-mentioned background art is big, and the samming nature is poor scheduling problem. The utility model provides a refrigerant direct cooling directly-heated type heat management system for energy storage rack and reposition of redundant personnel structure thereof, includes four-way reversing valve and multichannel samming choke valve, be equipped with four through-openings on the four-way reversing valve, the position of four-way reversing valve has the compressor through the pipe connection, the one end pipe connection of compressor has gas-liquid separator. The multi-channel temperature-equalizing throttle valve in the invention is a key component for ensuring the temperature uniformity of the direct-cooling direct-heating plate, and the plug column at the lower end of the valve head assembly can be driven by the coil in the valve head assembly, so that the flow area in the refrigerant flow channel is regulated, and the flow rate of the refrigerant in the channel is regulated.
Description
Technical Field
The patent relates to energy storage battery unit's control by temperature change and thermal management field specifically are refrigerant direct cooling directly-heated type thermal management system and reposition of redundant personnel structure for energy storage rack.
Background
The battery energy storage system generally takes an energy storage cabinet and a container as carriers, integrates a battery pack, a battery management system, a monitoring system, a fire protection system, a power distribution system and the like, and has the characteristics of high standardization degree, convenience in field arrangement and the like. In the actual use process of the battery, the fluctuation of the current can be caused by the change of the load, and the fluctuation of the current can cause the phenomenon of uneven heat generation of the battery pack. After the battery pack is used repeatedly, the aging degree of each single battery is different, the overcharge and overdischarge of the battery are easy to generate, the battery performance is reduced, the lithium battery is required to provide enough comfort for the single battery in the use process, the uniformity of each single battery in the battery module is ensured, the overall service life of the battery pack can be improved, and the temperature difference between the single batteries is generally required to be not more than 5 ℃;
when normal charge and discharge are carried out, the heat generated by the batteries is difficult to be discharged rapidly due to the tight arrangement of the batteries in the box body, and the phenomena of heat aggregation and the like are easy to occur among the battery packs. In order to ensure that the battery is maintained at a proper temperature and safety, thermal management of the battery is required. The main technical routes are three, namely air cooling, liquid cooling and refrigerant direct cooling. The air cooling technology is firstly applied by the advantages of simple structure, convenient installation and lower cost, but is limited by the environment and the heat generation rate of the single battery, when the environment is faced with high temperature and the battery is faced with high charge and discharge rate, the traditional air cooling technology can not meet the heat dissipation of an energy storage system with larger capacitance due to the low heat transfer coefficient of air, and the temperature difference between the battery packs at the inlet and the outlet is larger, so that the heat dissipation of the battery is uneven, and the heat management requirement of the energy storage system can not be met. The air cooling is gradually changed into a liquid cooling mode, and the liquid cooling heat exchange medium adopts cooling liquid, so that the air cooling device has the advantages of large heat capacity, high heat exchange coefficient, high cooling speed and the like, and is a main cooling mode of the existing energy storage battery unit. The liquid cooling system has the disadvantages that the pipeline is complex, the liquid medium has conductivity, the leakage risk exists, and the heat exchange quantity control is limited due to the limitation of the inlet and outlet water temperature of the liquid cooling system.
With the increase of the capacity and the charge-discharge multiplying power of the energy storage system, the air cooling and liquid cooling heat management technology cannot meet the increasing requirement of high heat flux. On new energy automobiles, a direct cooling and direct heating heat management mode of R134a refrigerant is already applied. Compared with the liquid cooling mode, the direct cooling mode has no heat exchange loss generated by secondary cooling liquid, and can realize higher speed and finer temperature control. However, the direct cooling system has the disadvantages of large difficulty in uniform distribution of refrigerant flow, poor temperature uniformity and large development difficulty, and is a bottleneck affecting further application of the refrigerant direct cooling technology.
Aiming at the working characteristics and working environment of the energy storage battery, the cooling and heating functions are developed, the temperature equalization requirement of the energy storage battery is met, the structure is simple, the reliability is high, and the cooling and heating direct thermal management system is a problem which engineering personnel need to solve.
Disclosure of Invention
The invention aims to provide a direct cooling and direct heating type heat management system for a refrigerant for an energy storage cabinet and a flow distribution structure thereof, so as to solve the problems of high difficulty in uniform distribution of refrigerant flow of a direct cooling system, poor temperature uniformity and the like in the prior art.
In order to achieve the above purpose, the present invention provides the following technical solutions:
the utility model provides a refrigerant direct cooling directly-heated type heat management system for energy storage rack and reposition of redundant personnel structure thereof, includes four-way reversing valve and multichannel samming choke valve, be equipped with four through-openings on the four-way reversing valve, no. 1 position of four-way reversing valve has the compressor through the pipeline connection, the one end pipeline connection of compressor has gas-liquid separator, no. 3 position through-openings on the four-way reversing valve and gas-liquid separator pass through the pipeline UNICOM, no. 2 position through-openings on the four-way reversing valve has the heat exchanger through the pipeline connection, heat exchanger one side is equipped with outer fan, the one end pipeline connection of heat exchanger has large aperture electronic expansion valve, the one end pipeline connection of large aperture electronic expansion valve has two-way reservoir, the one end pipeline connection of two-way reservoir has stop valve A;
the multi-channel temperature-equalizing throttle valve is characterized in that a plurality of direct-cooling direct-heating plates are connected to the multi-channel temperature-equalizing throttle valve pipeline at one end of the stop valve A, one end pipeline of each direct-cooling direct-heating plate is connected with the stop valve B in a summarizing mode, one end pipeline of each stop valve B is summarized to the fourth position on the four-way reversing valve, the multi-channel temperature-equalizing throttle valve, each direct-cooling direct-heating plate and each stop valve B are connected with the stop valve D in parallel, and each stop valve A, each multi-channel temperature-equalizing throttle valve and each direct-cooling direct-heating plate are connected with the stop valve C in parallel.
Preferably, a plurality of branches are connected between the multichannel temperature-equalizing throttle valve and the stop valve B, and the middle part of each branch is connected with each direct-cooling plate in a one-to-one correspondence manner through a pipeline.
Preferably, one of a plurality of branches between the stop valve B and the direct-cooling direct-heating plate is connected with an inner heat exchanger, and one side of the inner heat exchanger is provided with an inner fan.
Preferably, a plate heat exchanger is connected between the number position of the four-way reversing valve and the heat exchanger through a pipeline, one end of the plate heat exchanger is connected with a liquid heater through a pipeline, one end of the liquid heater is connected with a water pump through a pipeline, and one end of the water pump is connected with the other end of the plate heat exchanger through a pipeline.
Preferably, a battery pack is fixedly connected in the direct-cooling plate, and a local temperature control assembly is arranged between the multichannel temperature equalizing throttle valve and the direct-cooling plate in a pipeline connection mode.
Preferably, the local temperature control component comprises a temperature monitor fixedly connected with the upper end of the battery pack and an electromagnetic switch valve connected with a pipeline on the direct-cooling direct-heating plate, one end of the electromagnetic switch valve is connected with a bending type connecting pipe, and the upper end of the bending type connecting pipe is provided with a servo motor.
Preferably, a rotary shaft at the lower end of the servo motor is connected with a long shaft through a coupler, and spiral blades are fixedly connected around the long shaft.
Preferably, the temperature monitor is connected with a control chip through a wire, one end of the electromagnetic switch valve is connected with a control switch B through a wire, one end of the servo motor is connected with a control switch A through a wire, the temperature monitor, the control chip, the control switch B, the electromagnetic switch valve and an external power supply are connected in series through wires, the temperature monitor, the control chip, the control switch A, the servo motor and the external power supply are connected in series through wires, and a circuit where the servo motor and the control switch A are located is connected in parallel with a circuit where the electromagnetic switch valve and the control switch B are located.
Preferably, the multichannel samming throttle valve includes the valve body, is equipped with a plurality of valve head subassemblies around the valve body, the front end of valve body is equipped with refrigerant inlet, the rear end of valve body is equipped with a plurality of refrigerant liquid outlets, link up between refrigerant liquid outlet and the refrigerant inlet.
Preferably, a coil is arranged at the lower end of the interior of the valve head assembly, a plug column is arranged at the lower end of the coil, and the plug column moves in a through pipeline between the refrigerant liquid inlet and the refrigerant liquid outlet.
Compared with the prior art, the invention has the beneficial effects that:
1. the multi-channel temperature-equalizing throttle valve is a key component for ensuring the temperature uniformity of the direct-cooling plate, the number of valve head assemblies on the periphery of the multi-channel temperature-equalizing throttle valve is equal to the number of the battery packs and the direct-cooling plate, the multi-channel temperature-equalizing throttle valve is four-way, six-way, eight-way and other even numbers, the multi-channel temperature-equalizing throttle valve is convenient to arrange symmetrically, the battery packs with more than eight-way can be combined by adopting a plurality of multi-channel temperature-equalizing throttle valves, the multi-channel temperature-equalizing throttle valve is taken as an example, and the multi-channel temperature-equalizing throttle valve consists of a refrigerant liquid inlet, a valve body, the valve head assemblies and a refrigerant liquid outlet, wherein the number of the refrigerant liquid inlet is one, the number of the refrigerant liquid outlet is four, and threaded holes are arranged beside the liquid inlet and outlet, and the fixing and sealing of the liquid inlet are convenient; the valve body is made of aluminum alloy, a mounting structure of the refrigerant flow channel and the valve head assembly is formed by processing, a plug column at the lower end of the valve head assembly can be driven by a coil in the valve head assembly to move up and down on the inner side of the refrigerant liquid outlet, so that the flow area in the refrigerant flow channel is regulated, and the refrigerant flow in the channel is regulated;
2. the pipeline between the multichannel temperature equalizing throttle valve and the direct cooling direct heating plate can be further provided with a local temperature control component, wherein a battery pack is fixedly arranged in each direct cooling direct heating plate, the upper end of the battery pack is fixedly connected with a temperature monitor, the temperature monitor monitors the temperature of the whole battery pack in real time, the ideal working temperature of the battery pack is 15-25 ℃, if the temperature monitor detects that the temperature of the battery pack is 15-25 ℃, the temperature monitor converts a temperature signal into an electric signal and gives the electric signal to a control chip, the control chip simultaneously closes a control switch B of an electromagnetic switch valve and a control switch A of a servo motor, so that the electromagnetic switch valve and the servo motor stop running, and the electromagnetic switch valve closes a passage between the multichannel temperature equalizing throttle valve and the direct cooling direct heating plate, thereby stopping running of the direct cooling direct heating plate on one battery pack;
if the temperature monitor detects that the temperature of the battery pack is below 5 ℃ or above 25 ℃, the temperature monitor converts a temperature signal into an electric signal and gives the electric signal to the control chip, the control chip simultaneously opens a switch of the electromagnetic switch valve and a switch of the servo motor, so that the electromagnetic switch valve and the servo motor are opened for operation, the electromagnetic switch valve opens a passage between the multi-passage temperature equalizing throttle valve and the direct cooling direct heating plate, so that the direct cooling direct heating plate on one battery pack is opened for operation, the arrangement and the working principle realize that when the weather is at a slightly low temperature, a part of batteries do not need to be heated or radiated (namely, the temperature of the batteries is between 15 ℃ and 25 ℃), the local temperature control assembly can control to close a branch passage between the multi-passage temperature equalizing throttle valve and the direct cooling direct heating plate, but some batteries can also control the opening of the branch passage through the local temperature control assembly to accurately cool the batteries; and when weather temperature is higher or lower, then the temperature of battery package is below 15 ℃ or when above 25 ℃, also can carry out accurate intensification or cooling through holistic local temperature control subassembly, then the setting of above local temperature control subassembly further improves the intelligence of whole system to battery temperature control.
Drawings
FIG. 1 is a schematic diagram of the overall system of the present invention;
FIG. 2 illustrates the dehumidification and heating operation of the overall system of the present invention;
FIG. 3 is a diagram of an overall system low temperature heat pump Kuang Tu of the present invention;
FIG. 4 is a front perspective view of the channel temperature equalizing throttle structure of the present invention;
FIG. 5 is a rear perspective view of the channel temperature equalizing throttle structure of the present invention;
FIG. 6 is a side cutaway view of the channel temperature equalizing throttle structure of the present invention;
FIG. 7 is a perspective view of a partial temperature control assembly of the present invention;
FIG. 8 is an enlarged view of the perspective structure of FIG. 7A in accordance with the present invention;
fig. 9 is an electrical schematic diagram of the components of the local temperature control assembly of the present invention.
In the figure: 1. a stop valve A; 2. a stop valve B; 3. a stop valve C; 4. a stop valve D; 5. a multi-channel temperature equalizing throttle valve; 501. a valve body; 502. a refrigerant liquid inlet; 503. a valve head assembly; 504. a coil; 505. a plug; 506. a refrigerant liquid outlet; 6. direct cooling direct heating plate; 7. a local temperature control assembly; 701. a temperature monitor; 702. an electromagnetic switch valve; 703. a servo motor; 704. a bending type connecting pipe; 705. a long axis; 706. spiral leaves; 707. a control chip; 708. a control type switch A; 709. a control type switch B; 8. a compressor; 9. a four-way reversing valve; 10. an outer fan; 11. a heat exchanger; 12. a large aperture electronic expansion valve; 13. a bidirectional reservoir; 14. a gas-liquid separator; 15. a battery pack; 16. an inner heat exchanger; 17. an inner fan; 18. a plate heat exchanger; 19. a liquid heater; 20. and (3) a water pump.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments.
Referring to fig. 1 to 6, an embodiment of the present invention provides: the direct cooling and direct heating type heat management system for the refrigerant for the energy storage cabinet comprises a four-way reversing valve 9 and a multi-channel temperature equalizing throttle valve 5, wherein four ports are formed in the four-way reversing valve 9, the number 1 position of the four-way reversing valve 9 is connected with a compressor 8 through a pipeline, one end pipeline of the compressor 8 is connected with a gas-liquid separator 14, the number 3 port on the four-way reversing valve 9 is communicated with the gas-liquid separator 14 through a pipeline, the number 2 port on the four-way reversing valve 9 is connected with a heat exchanger 11 through a pipeline, one side of the heat exchanger 11 is provided with an external fan 10, one end pipeline of the heat exchanger 11 is connected with a large-aperture electronic expansion valve 12, one end pipeline of the large-aperture electronic expansion valve 12 is connected with a bidirectional liquid reservoir 13, one end pipeline of the bidirectional liquid reservoir 13 is connected with a stop valve A1, the number of channels of the multi-channel temperature equalizing throttle valve 5 is consistent with the number of parallel direct cooling and direct heating plates 6, and the external fan 10 is communicated with each other through air flow, so that the external fan 11 releases heat or absorbs heat into air;
the multi-channel temperature-equalizing throttle valve 5 connected to one end of the stop valve A1 is connected with a plurality of direct-cooling direct-heating plates 6 through pipelines, one end pipeline of the plurality of direct-cooling direct-heating plates 6 is summarized and connected with a stop valve B2, one end pipeline of the stop valve B2 is summarized to the fourth position on the four-way reversing valve 9, the pipelines of the multi-channel temperature-equalizing throttle valve 5, the direct-cooling direct-heating plates 6 and the stop valve B2 are connected with a stop valve D4 in parallel, the pipelines of the stop valve A1, the multi-channel temperature-equalizing throttle valve 5 and the direct-cooling direct-heating plates 6 are connected with a stop valve C3 in parallel, a plurality of branches are connected between the multi-channel temperature-equalizing throttle valve 5 and the stop valve B2, and the middle part of each branch is connected with each direct-cooling direct-heating plate 6 through a pipeline in a one-to-one correspondence;
fig. 1 shows a schematic diagram of a refrigerant direct cooling and direct heating type thermal management system for an energy storage battery cabinet, under the direct cooling working condition of the system, a number 1 through port and a number 2 through port on a four-way reversing valve 9 are communicated, a number 3 through port and a number 4 through port are communicated, then a stop valve A1 and a stop valve B2 are opened, a stop valve C3 and a stop valve D4 are closed, a large-aperture electronic expansion valve 12 is opened to be the maximum opening, and then the opening of each channel in a multichannel uniform temperature throttle valve 5 is smaller and is used as the electronic expansion valve. The temperature of the refrigerant entering the direct-cooling plate is lower, so that the direct-cooling plate absorbs the heat of the battery, and the working state is a direct-cooling plate 6;
meanwhile, the flow direction of the refrigerant is as follows: the refrigerant starts from the compressor 8 and flows from the No. 1 port of the four-way reversing valve 9 to the No. 2 port of the four-way reversing valve 9, the external heat exchanger 11, the large-aperture electronic expansion valve 12, the bidirectional liquid storage device 13, the stop valve A1, the multi-channel temperature-equalizing throttle valve 5, the direct-cooling direct-heating plate 6, the stop valve B2, and finally flows to the gas-liquid separator 14 from the No. 4 port of the four-way reversing valve 9 to the No. 3 port of the four-way reversing valve 9; after passing through the stop valve A1, the refrigerant enters the multi-channel temperature-equalizing throttle valve 5, and as the temperature detector is arranged on the surface of the battery, the multi-channel temperature-equalizing throttle valve 5 receives the temperature value fed back by the temperature detector on the surface of the battery pack 15, and the temperature detector transmits an electric signal to the controller, so that the controller respectively adjusts the opening of each passage on the multi-channel temperature-equalizing throttle valve 5 to adjust the flow of the refrigerant entering different battery packs 15, ensure that the temperature in each battery pack 15 is the same, and achieve the high temperature-equalizing cooling effect;
fig. 2 shows that the functions of dehumidifying and heating the air of the energy storage battery cabinet are added on the basis of the refrigerant direct-cooling and direct-heating type heat management system for the energy storage battery cabinet: one of the branches between the stop valve B2 and the direct-cooling direct-heating plate 6 is connected with an inner heat exchanger 16, one side of the inner heat exchanger 16 is provided with an inner fan 17, the direct-cooling direct-heating plate 6 of one battery pack 15 is adjusted to the inner heat exchanger 16, and the inner fan 17 is added and is arranged outside the battery pack 15 in the energy storage cabinet. Under the direct cooling working condition, the branch can be closed through the multichannel samming throttle valve 5, when the air dehumidifying requirement exists, the branch on the multichannel samming throttle valve 5 is opened and throttled, meanwhile, the inner fan 17 on the branch works, the inner heat exchanger 16 works as an evaporator, the temperature of water vapor in the air drops when passing through the low-temperature surface of the inner heat exchanger 16, the water vapor is condensed into condensed water, and the condensed water is discharged from the energy storage cabinet through the collecting and backflow device, so that the air dehumidifying requirement is realized. Similar to air dehumidification, under the direct heating condition, the branch can be closed through the multichannel temperature equalizing throttle valve, when the air heating requirement exists, the multichannel temperature equalizing throttle valve 5 opens the branch and works with the maximum drift diameter, meanwhile, the inner fan 17 is opened, and the inner heat exchanger 16 works as a condenser to realize the heating function in the energy storage electric cabinet;
a plate heat exchanger 18 is connected through a pipeline between the No. 2 position of the four-way reversing valve 9 and the heat exchanger 11, one end of the plate heat exchanger 18 is connected with a liquid heater 19 through a pipeline, one end of the liquid heater 19 is connected with a water pump 20 through a pipeline, and one end of the water pump 20 is connected with the other end of the plate heat exchanger 18 through a pipeline;
fig. 3 shows a low-temperature heating range of a basic extended direct-heating working condition of the refrigerant direct-cooling direct-heating heat management system for the energy storage battery cabinet: for example, the refrigerant in the pipeline of the whole system is R134A, and can absorb heat from air at the ambient temperature above-7 ℃ under the influence of the physical property of the refrigerant, so that low-temperature heating is realized, and the system cannot stably operate at the temperature below-7 ℃. In order to solve the problem, the low-temperature heating environment temperature is expanded to-20 ℃, a plate heat exchanger 18, a liquid heater 19 and a water pump 20 are added between the four-way reversing valve 9 and the outer heat exchanger 11, and the water pump 20 and the liquid heater 19 do not operate under the direct cooling working condition in the system passage, wherein the plate heat exchanger 18 serves as the passage, and the cooling medium flows. Under heating working conditions, the environment temperature is higher than minus 7 ℃, the water pump 20 and the liquid heater 19 are started under the working conditions described above, the outer fan 10 and the outer heat exchanger 11 are closed, the outer heat exchanger 11 at the moment is used as a passage and does not participate in heat exchange, and the refrigerant indirectly absorbs the heat in the liquid heater 19 from the plate heat exchanger 18, at the moment, the COP refrigeration performance coefficient of the system operation means that the cooling capacity obtained by unit power consumption is smaller than 1, the energy efficiency is lower, and the main purpose of the system operation is to expand the low-temperature use range;
the direct cooling and direct heating type heat management system for the refrigerant comprises direct cooling and direct heating functions of the battery pack refrigerant, and adopts a four-way reversing valve 9 which is widely used in the field of household air conditioners to finish the conversion of the flow direction of the refrigerant, and the conversion of the flow direction of the refrigerant under the two working conditions of direct cooling and direct heating is realized by combining 4 stop valves. The device has the advantages of few components, simple structure, low system cost and high reliability.
Under the direct cooling working condition, the refrigerant direct cooling is adopted, and compared with the existing liquid cooling mode, the cooling liquid loop components such as a circulating pump, plate replacement and the like are omitted, so that the cooling efficiency is high, the response speed is high, the temperature equalization effect is good, and the cooling requirement in the high-power quick-charging and quick-discharging process is met;
under the direct heating working condition, heat is absorbed from the air through the heat exchanger, heat pump circulation is realized, and compared with the traditional mode of indirectly heating the battery pack 15 through PTC, the system is high in energy efficiency, good in energy saving effect, fast in heating rate and good in temperature equalizing effect, and the heating requirement of the energy storage battery under the low-temperature working condition is met. The refrigerant can adopt environment-friendly refrigerants such as R134a, R1234yf and the like, and under the condition that the heat exchanger and the direct-cooling plate can meet working pressure, the refrigerant can also adopt carbon dioxide natural refrigerant;
the multichannel samming throttle valve 5 comprises a valve body 501, a plurality of valve head assemblies 503 are arranged around the valve body 501, a refrigerant liquid inlet 502 is arranged at the front end of the valve body 501, a plurality of refrigerant liquid outlets 506 are arranged at the rear end of the valve body 501, the refrigerant liquid outlets 506 are in through connection with the refrigerant liquid inlets 502, a coil 504 is arranged at the lower end inside the valve head assemblies 503, a plug column 505 is arranged at the lower end of the coil 504, and the plug column 505 moves in a through pipeline between the refrigerant liquid inlets 502 and the refrigerant liquid outlets 506;
the multichannel samming throttle valve 5 is a key component for ensuring the temperature uniformity of the direct-cooling plate. The number of the valve head assemblies 503 around the valve head assembly is equal to that of the battery packs 15 and the direct cooling direct heating plates 6, and the valve head assemblies are generally 4-way, 6-way, 8-way and the like even numbers, so that the valve head assemblies are convenient to symmetrically arrange, and the battery packs 15 with the size more than 8-way can be combined by adopting a plurality of multi-channel temperature-equalizing throttle valves 5. Fig. 4 to 6 take a 4-way temperature equalizing throttle valve as an example, and the valve consists of a refrigerant liquid inlet 502, a valve body 501, a valve head assembly 503 and a refrigerant liquid outlet 506. The number of the refrigerant liquid inlets is 1, the number of the refrigerant liquid outlets is 4, and screw holes are formed beside the liquid inlets and the liquid outlets, so that the liquid inlets and the liquid outlets can be conveniently fixed and sealed; the valve body is made of aluminum alloy, a mounting structure of a refrigerant flow channel and the valve head assembly 503 is formed by processing, a plug column 505 at the lower end of the valve head assembly 503 can be driven by a coil 504 in the valve head assembly to move up and down on the inner side of a refrigerant liquid outlet 506, so that the flow area in a refrigerant flow channel is regulated, and the flow rate of refrigerant in the channel is regulated;
the battery pack 15 is fixedly connected in the direct cooling direct heating plate 6, the local temperature control assembly 7 is arranged between the multichannel samming throttle valve 5 and the direct cooling direct heating plate 6 through pipeline connection, the local temperature control assembly 7 comprises a temperature monitor 701 fixedly connected with the upper end of the battery pack 15 and an electromagnetic switch valve 702 fixedly connected with the pipeline on the direct cooling direct heating plate 6, one end of the electromagnetic switch valve 702 is connected with a bending type connecting pipe 704, a servo motor 703 is arranged at the upper end of the bending type connecting pipe 704, a long shaft 705 is connected with a rotating shaft at the lower end of the servo motor 703 through a coupler, spiral blades 706 are fixedly connected around the long shaft 705, and then after the rotating shaft at the lower end of the servo motor 703 drives the long shaft 705 to rotate, the spiral shape of the long shaft 705 rotates in the bending type connecting pipe 704 and enables a refrigerant in the bending type connecting pipe 704 to rotate to be in a vortex shape, so that the speed of refrigerant flowing in the bending type connecting pipe 704 is greatly improved, and the speed of the cooling and heating of the whole direct cooling direct heating plate 6 is further accelerated.
The temperature monitor 701 is connected with the control chip 707 through a wire, one end of the electromagnetic switch valve 702 is connected with the control switch B709 through a wire, one end of the servo motor 703 is connected with the control switch A708 through a wire, the temperature monitor 701, the control chip 707, the control switch B709, the electromagnetic switch valve 702 and an external power supply are connected in series through wires, the temperature monitor 701, the control chip 707, the control switch A708, the servo motor 703 and the external power supply are connected in series through wires, and a circuit where the servo motor 703 and the control switch A708 are positioned is connected in parallel with a circuit where the electromagnetic switch valve 702 and the control switch B709 are positioned;
the pipeline between the multi-channel temperature equalizing throttle valve 5 and the direct cooling direct heating plate 6 can be further provided with a local temperature control component 7, wherein a battery pack 15 is fixedly installed in each direct cooling direct heating plate 6, the upper end of the battery pack 15 is fixedly connected with a temperature monitor 701, the temperature monitor 701 monitors the temperature of the whole battery pack 15 in real time, the ideal temperature for the battery pack 15 to work is 15-25 ℃, if the temperature monitor 701 detects that the temperature of the battery pack 15 is 15-25 ℃, the temperature monitor 701 converts a temperature signal into an electric signal to be given to a control chip 707, the control chip 707 simultaneously closes a control switch B709 of an electromagnetic switch valve 702 and a control switch A708 of a servo motor 703, so that the electromagnetic switch valve 702 and the servo motor 703 stop running, and the electromagnetic switch valve 702 closes a passage between the multi-channel temperature equalizing throttle valve 5 and the direct cooling direct heating plate 6, thereby stopping the running of the direct cooling direct heating plate 6 on one battery pack 15;
if the temperature monitor 701 detects that the temperature of the battery pack 15 is below 15 ℃ or above 25 ℃, the temperature monitor 701 converts a temperature signal into an electric signal and gives the electric signal to the control chip, the control chip simultaneously opens the switch of the electromagnetic switch valve 702 and the switch of the servo motor 703, so that the electromagnetic switch valve 702 and the servo motor 703 are opened to operate, the electromagnetic switch valve 702 opens a passage between the multichannel temperature equalizing throttle valve 5 and the direct cooling direct heating plate 6, so as to open the direct cooling direct heating plate 6 on one of the battery packs 15 to operate, the arrangement and the working principle above realize that when the weather is slightly low, a part of batteries do not need to be heated or dissipate heat, namely, the battery temperature is between 15 ℃ and 25 ℃, the local temperature control assembly 7 can control to close a branch passage between the multichannel temperature equalizing throttle valve 5 and the direct cooling direct heating plate 6, but some batteries can also control the opening of the branch passage through the local temperature control assembly 7 to accurately cool the batteries; when the temperature of the battery pack 15 is lower than 15 ℃ or higher than 25 ℃ when the weather temperature is higher or lower, the temperature can be accurately increased or decreased through the integral local temperature control assembly 7.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (10)
1. The utility model provides a refrigerant direct cooling directly-heated type heat management system for energy storage rack and reposition of redundant personnel structure thereof, includes four-way reversing valve (9) and multichannel samming choke valve (5), its characterized in that: four through holes are formed in the four-way reversing valve (9), a compressor (8) is connected to the No. 1 position of the four-way reversing valve (9) through a pipeline, a gas-liquid separator (14) is connected to one end pipeline of the compressor (8), the No. 3 through hole and the gas-liquid separator (14) on the four-way reversing valve (9) are communicated through pipelines, a heat exchanger (11) is connected to the No. 2 through hole on the four-way reversing valve (9) through a pipeline, an outer fan (10) is arranged on one side of the heat exchanger (11), a large-aperture electronic expansion valve (12) is connected to one end pipeline of the heat exchanger (11), a bidirectional liquid storage device (13) is connected to one end pipeline of the large-aperture electronic expansion valve (12), and a stop valve A (1) is connected to one end pipeline of the bidirectional liquid storage device (13);
connect in multichannel samming choke valve (5) pipe connection of stop valve A (1) one end has a plurality of directly cold straight hot plates (6), a plurality of the one end pipeline of directly cold straight hot plates (6) is summarized and is connected with stop valve B (2), the one end pipeline of stop valve B (2) is summarized to the number 4 position on four-way reversing valve (9), parallelly connected stop valve D (4) on the pipeline of multichannel samming choke valve (5), directly cold straight hot plates (6) and stop valve B (2), parallelly connected stop valve C (3) on the pipeline of stop valve A (1), multichannel samming choke valve (5) and directly cold straight hot plates (6).
2. The direct cooling and direct heating type refrigerant heat management system for an energy storage cabinet and a flow distribution structure thereof according to claim 1, wherein: a plurality of branches are connected between the multichannel temperature-equalizing throttle valve (5) and the stop valve B (2), and the middle of each branch is connected with each direct-cooling plate (6) in a one-to-one correspondence manner through a pipeline.
3. The direct cooling and direct heating type refrigerant heat management system for an energy storage cabinet and a flow distribution structure thereof as claimed in claim 2, wherein: one of a plurality of branches between the stop valve B (2) and the direct cooling direct heating plate (6) is connected with an inner heat exchanger (16), and one side of the inner heat exchanger (16) is provided with an inner fan (17).
4. The direct cooling and direct heating type refrigerant heat management system for an energy storage cabinet and a flow distribution structure thereof according to claim 1, wherein: the pipeline between No. 2 positions of four-way reversing valve (9) and heat exchanger (11) is connected with plate heat exchanger (18), plate heat exchanger (18) one end pipeline is connected with liquid heater (19), liquid heater (19) one end pipeline is connected with water pump (20), water pump (20) one end and plate heat exchanger (18) other end pass through the pipeline connection.
5. The direct cooling and direct heating type refrigerant heat management system for an energy storage cabinet and a flow distribution structure thereof according to claim 1, wherein: the battery pack (15) is fixedly connected in the direct-cooling plate (6), and a local temperature control assembly (7) is arranged between the multichannel temperature-equalizing throttle valve (5) and the direct-cooling plate (6) in a pipeline connection mode.
6. The direct cooling and direct heating type refrigerant heat management system for an energy storage cabinet and a flow distribution structure thereof according to claim 5, wherein: the local temperature control assembly (7) comprises a temperature monitor (701) fixedly connected with the upper end of a battery pack (15) and an electromagnetic switch valve (702) connected with a pipeline on a direct-cooling direct-heating plate (6), one end of the electromagnetic switch valve (702) is connected with a bent connecting pipe (704), and the upper end of the bent connecting pipe (704) is provided with a servo motor (703).
7. The direct cooling and direct heating type refrigerant heat management system for an energy storage cabinet and a flow distribution structure thereof according to claim 6, wherein: the rotary shaft at the lower end of the servo motor (703) is connected with a long shaft (705) through a coupler, and spiral blades (706) are fixedly connected around the long shaft (705).
8. The direct cooling and direct heating type refrigerant heat management system for an energy storage cabinet and a flow distribution structure thereof according to claim 7, wherein: the temperature monitor (701) is connected with a control chip (707) through a wire, one end of the electromagnetic switch valve (702) is connected with a control switch B (709) through a wire, one end of the servo motor (703) is connected with a control switch A (708) through a wire, the temperature monitor (701), the control chip (707), the control switch B (709), the electromagnetic switch valve (702) and an external power supply are connected in series through wires, the temperature monitor (701), the control chip (707), the control switch A (708), the servo motor (703) and the external power supply are connected in series through wires, and a circuit where the servo motor (703) and the control switch A (708) are located is connected in parallel with a circuit where the electromagnetic switch valve (702) and the control switch B (709) are located.
9. The direct cooling and direct heating type refrigerant heat management system for an energy storage cabinet and a flow distribution structure thereof according to claim 8, wherein: the multichannel samming throttle valve (5) includes valve body (501), is equipped with a plurality of valve head subassembly (503) around valve body (501), the front end of valve body (501) is equipped with refrigerant inlet (502), the rear end of valve body (501) is equipped with a plurality of refrigerant liquid outlet (506), link up between refrigerant liquid outlet (506) and refrigerant inlet (502).
10. The direct cooling and direct heating type refrigerant heat management system for an energy storage cabinet and a flow distribution structure thereof according to claim 9, wherein: the lower end inside valve head subassembly (503) is equipped with coil (504), the lower extreme of coil (504) is equipped with plug post (505), plug post (505) activity is in link up the pipeline between refrigerant inlet (502) and refrigerant liquid outlet (506).
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| CN202311587629.6A CN117293449A (en) | 2023-11-27 | 2023-11-27 | Refrigerant direct-cooling and direct-heating type heat management system for energy storage cabinet and flow distribution structure of refrigerant direct-cooling and direct-heating type heat management system |
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| CN202311587629.6A CN117293449A (en) | 2023-11-27 | 2023-11-27 | Refrigerant direct-cooling and direct-heating type heat management system for energy storage cabinet and flow distribution structure of refrigerant direct-cooling and direct-heating type heat management system |
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