CN109149012B - Temperature control system based on magnetic refrigeration technology, electric automobile battery pack thermal management system and method - Google Patents
Temperature control system based on magnetic refrigeration technology, electric automobile battery pack thermal management system and method Download PDFInfo
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- CN109149012B CN109149012B CN201811150022.0A CN201811150022A CN109149012B CN 109149012 B CN109149012 B CN 109149012B CN 201811150022 A CN201811150022 A CN 201811150022A CN 109149012 B CN109149012 B CN 109149012B
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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
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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
- H01M10/615—Heating or keeping warm
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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
- H01M10/617—Types of temperature control for achieving uniformity or desired distribution of temperature
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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
- H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
- H01M10/625—Vehicles
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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
- H01M10/635—Control systems based on ambient temperature
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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
- H01M10/6551—Surfaces specially adapted for heat dissipation or radiation, e.g. fins or coatings
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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
- H01M10/65—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
- H01M10/6561—Gases
- H01M10/6563—Gases with forced flow, e.g. by blowers
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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
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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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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2220/00—Batteries for particular applications
- H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
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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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- 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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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Abstract
The utility model provides a temperature control system based on a magnetic refrigeration technology, an electric automobile battery pack thermal management system and a method, wherein a heat dissipation box is connected with one side of a containing box through a hot flow pipeline, the other side of the containing box is connected through a cold flow pipeline to form a loop, the heat dissipation box comprises a heat dissipation box body, a plurality of heat dissipation fins are sleeved on the outer edge of the heat dissipation box body in sequence, and an electromagnet and a heating pipeline are arranged on the inner surface of the heat dissipation box body; the containing box comprises an external heat insulation box body and an internal micro-channel baffle box, the micro-channel baffle box comprises a plurality of containing chambers which are separated by micro-channel baffles, a plurality of connecting pipelines which are transverse and longitudinal are arranged in the front wall surface and the rear wall surface of the box body, a plurality of connecting branch pipes are arranged in the micro-channel baffle, the connecting branch pipes are communicated with the connecting pipelines, and the temperature drop is generated when the magnetic fluid cooling fluid flows out of the heat dissipation box due to the magneto-thermal effect of the magnetic refrigeration material, so that the temperature of the magnetic fluid cooling fluid entering the containing box from a cold flow pipeline can be effectively reduced, and the consistency of the internal temperature of an acted object is maintained.
Description
Technical Field
The disclosure relates to a temperature control system based on a magnetic refrigeration technology, and an electric vehicle battery pack thermal management system and method.
Background
Under the promotion of energy crisis and environmental pollution, new energy technologies represented by power batteries are rapidly developed and widely applied. As a power source for many devices (e.g., electric vehicles), a battery pack is closely related to the performance of the device as a whole.
However, in practical applications of the above-mentioned devices using battery packs as power sources, the battery cells are generally assembled into the battery packs in series-parallel connection for providing a suitable voltage and sufficient electric power. In the running or charging process of the equipment, chemical reaction inside the battery and internal resistance of the battery cause the battery monomer to heat and lead to the temperature rise of the battery pack, and the difference of the heat productivity of different parts of the battery monomer and the heat productivity of the battery monomer at different positions finally leads to the inconsistency of the internal temperature of the battery pack. The inconsistency of the temperature rise of the battery pack and the internal temperature of the battery pack may cause the service life and capacity of the battery pack to be reduced, even cause thermal runaway, resulting in a safety accident. Meanwhile, when the ambient temperature is low or cold starting is carried out, the reaction speed of chemical substances in the battery is reduced, the charge and discharge capacity of the battery pack is greatly reduced, and if the battery pack is in a low-temperature running or frequent low-temperature starting state for a long time, the service life of the battery pack is also damaged.
The existing heat dissipation modes of the battery pack mainly comprise air cooling, liquid cooling, phase change material cooling, heat pipe cooling and the like. There are many documents studied in this respect, however, these cooling or thermal management techniques currently have certain drawbacks.
As in chinese patent No. CN102832425a, entitled "a thermal management system for battery pack of electric vehicle and thermal management method thereof", it is disclosed that a cooling plate is disposed between two layers of batteries to absorb heat generated by the batteries, a cooling liquid flow channel is disposed in the cooling plate to carry heat out of the battery pack, and high-temperature cooling liquid flowing out of the battery pack is cooled by a radiator and a fan; but the heat dissipation power of the radiator and the fan is limited, the cooling effect of the high-temperature cooling liquid flowing through the radiator is not ideal when the environment temperature is high, meanwhile, the cooling liquid flow passage in the cooling plate is too long, the temperature rise in the cooling liquid flow is too high, the cooling condition of the tail end of the pipeline is poor, and the temperature consistency in the battery pack is not high.
Chinese patent CN206546865U entitled "a battery thermal management system based on phase change material and air coupling cooling" discloses arranging a composite phase change plate between a battery cell and a fin heat dissipation plate, where the composite phase change plate absorbs heat generated by the battery cell and transfers the heat to the fins of the heat dissipation plate, and the air flows through the fins to take away the heat; but fin heating panel makes group battery volume increase by a wide margin, has reduced group rate of group battery, and air cooling's heat exchange efficiency is low when ambient temperature is higher, and the heat dissipation condition of terminal fin is relatively poor leads to the inside temperature uniformity of group battery relatively poor, and this thermal management system does not possess low temperature heating capacity in addition.
In summary, it is necessary to perform good temperature control on the power battery pack to improve the high-temperature heat dissipation and low-temperature heating capabilities of the battery pack and maintain the consistency of the internal temperature of the battery pack.
Disclosure of Invention
In order to solve the problems, the disclosure provides a temperature control system based on a magnetic refrigeration technology, an electric vehicle battery pack thermal management system and a method, and the disclosure is based on the magnetic refrigeration technology, and utilizes the magneto-thermal effect of a magnetic refrigeration material to generate temperature drop when a magnetic fluid cooling liquid flows out of a heat dissipation box, so that the temperature of the magnetic fluid cooling liquid entering a containing box from a cold flow pipeline can be effectively reduced, the heat dissipation effect of an acted object is improved, and the consistency of the internal temperature of the acted object is maintained.
In order to achieve the above purpose, the present disclosure adopts the following technical scheme:
the temperature control system comprises a heat dissipation box, a containing box, a heat flow pipeline, a cold flow pipeline and a driving piece, wherein one side of the heat dissipation box is connected with one side of the containing box through the heat flow pipeline, the other side of the heat dissipation box is connected with the other side of the containing box through the cold flow pipeline to form a loop, the driving piece is arranged on the loop to drive the circulating flow of internal fluid, and temperature sensors are arranged on the heat flow pipeline and the cold flow pipeline;
the heat dissipation box comprises a heat dissipation box body, wherein a plurality of heat dissipation fins are sequentially sleeved on the outer edge of the heat dissipation box body, a plurality of electromagnets corresponding to one another are arranged on at least two opposite inner walls of the inner surface of the heat dissipation box body, and a heating pipeline is arranged in the heat dissipation box body;
the accommodating box comprises an external heat insulation box body and an internal micro-channel baffle box, the micro-channel baffle box comprises a plurality of accommodating chambers separated by micro-channel baffles, a plurality of connecting pipelines in the transverse direction and the longitudinal direction are arranged in the front wall surface and the rear wall surface of the micro-channel baffle box body, a plurality of connecting branch pipes are arranged in the micro-channel baffles, and the connecting branch pipes are communicated with the connecting pipelines;
the working state of the permanent magnet or the heating pipeline is controlled, so that the fluid flowing out of the heat dissipation box reaches the set temperature, circulates in the loop under the action of the driving piece, and cools or heats the acted object accommodated in the accommodating chamber.
As a further limitation, the heat insulation box body is a cuboid open shell made of heat insulation materials, the left side and the right side of the box body are respectively provided with a liquid inlet through hole and a liquid outlet through hole, the position of the liquid inlet through hole is matched with the position of the inlet of the liquid inlet main pipe on the micro-channel baffle plate box, and the position of the liquid outlet through hole is matched with the position of the outlet of the liquid outlet main pipe on the micro-channel baffle plate box.
Through the position phase-match of above-mentioned structure, guarantee the effective flow of microchannel baffle incasement fluid, cooperation microchannel baffle incasement's connecting line and connecting branch pipe guarantee that the fluid can three-dimensional evenly flow each accommodation chamber, form even control by temperature change environment.
As a further limitation, the heat-insulating box body is detachably connected with a box cover made of heat-insulating material.
As a further limitation, the fluid channels of the microchannel separator tank include a liquid inlet manifold, a liquid inlet branch pipe, a connecting branch pipe, a liquid outlet branch pipe and a liquid outlet manifold; the liquid inlet main pipe is positioned at the lower part of the front side wall surface of the micro-channel baffle box, the liquid inlet branch pipes are vertically distributed at the front part of the micro-channel baffle box, the liquid outlet branch pipes are vertically distributed at the rear part of the micro-channel baffle box, and the liquid outlet main pipe is positioned at the upper part of the rear side wall surface of the micro-channel baffle box; the liquid inlet main pipe is connected with each liquid inlet branch pipe, the liquid outlet main pipe is connected with each liquid outlet branch pipe, and each pair of liquid inlet branch pipes and liquid outlet branch pipes are connected by a group of connecting branch pipes. The structure can further ensure that fluid can flow through each accommodating chamber three-dimensionally and uniformly to form a uniform temperature control environment, and ensure the temperature consistency of controlled objects.
As a further definition, the microchannel baffles are equally spaced.
As a further limitation, the heat dissipation box body comprises a heat dissipation box body shell and heat dissipation fins, the left wall surface and the right wall surface of the heat dissipation box body shell are respectively provided with a liquid inlet hole and a liquid outlet hole, a group of heat dissipation fins which are uniformly arranged are cast into a whole with the heat dissipation box body shell, and the heat dissipation fins are arranged in parallel and have the same interval.
As a further limitation, a speed regulating fan is arranged on the outer side of the heat dissipation box. The heat dissipation can be accelerated by arranging the fan.
As a further limitation, the heat dissipating case is a magnetic shielding material, to which a heat dissipating case cover is detachably connected, the heat dissipating case cover includes a heat dissipating case cover case and a heat dissipating fin, and the heat dissipating fin is cast integrally with the heat dissipating case cover case.
As a further limitation, the bottom of the heat dissipation box cover shell is provided with a spigot, and the spigot at the top of the heat dissipation box body shell are nested together to form a sealed heat dissipation box with a magnetic shielding function.
The battery pack thermal management system comprises the temperature control system, and each battery cell is arranged in each accommodating chamber.
The battery pack thermal management system of the electric automobile comprises the battery pack thermal management system, an electromagnet is controlled by a control circuit, the control circuit is connected with an electronic control unit of the electric automobile, and the electronic control unit is also connected with a heating pipeline control circuit, temperature sensors of a hot flow pipeline and a cold flow pipeline and a driving piece.
Based on the working method of the battery pack thermal management system of the electric automobile, when the temperature of the magnetic fluid cooling liquid is detected to be lower than a set value, the heating pipeline is controlled to work, the permanent magnet is controlled to be not operated, the heating of the magnetic fluid cooling liquid is realized, and the normal working temperature environment of the battery pack is ensured;
when the temperature of the magnetic fluid cooling liquid is detected to be higher than a preset value, the permanent magnet is controlled to work, the heating pipeline is controlled to be not work, a uniformly distributed magnetic field is formed in the heat dissipation box, the temperature of the magnetic refrigeration material nano particles in the magnetic fluid cooling liquid in the heat dissipation box is increased after the magnetic refrigeration material nano particles are magnetized, the temperature of the magnetic fluid cooling liquid is increased, the heat dissipation is carried out by using the heat dissipation fins, no magnetic field exists outside the heat dissipation box, and after the magnetic fluid cooling liquid flows out of the heat dissipation box, the temperature of the magnetic refrigeration material nano particles which are originally in a magnetized state in the magnetic fluid cooling liquid is reduced to generate temperature drop, so that the temperature of the magnetic fluid cooling liquid is further reduced below the ambient temperature, and the normal working temperature environment of the battery pack is ensured.
Compared with the prior art, the beneficial effects of the present disclosure are:
1. the magnetocaloric effect of the magnetic refrigeration material causes temperature drop when the magnetofluid cooling liquid flows out of the heat dissipation box, so that the temperature of the magnetofluid cooling liquid entering the micro-channel baffle box from the cold flow pipeline is reduced, and the heat dissipation effect is improved;
2. the heat radiating fins which are uniformly arranged on the heat radiating box increase the heat radiating area of the heat radiating box, the speed regulating fan arranged at the front part of the heat radiating box improves the heat radiating efficiency of the heat radiating box, reduces the temperature of the magnetic fluid cooling liquid entering the heat radiating box from the heat flow pipeline, and further improves the heat radiating effect;
3. the flow rate of the magnetic fluid cooling liquid in each flow path tends to be consistent through the flow channel design in the micro-channel baffle box; the length of each connecting branch pipe connecting the liquid inlet branch pipe and the liquid outlet branch pipe is smaller, so that the temperature rise in the flowing process of the magnetic fluid cooling liquid is reduced; both improve temperature consistency;
4. when the electromagnetic type electromagnetic cooling device is applied to an electric automobile, the electronic control unit monitors the temperature of the magnetic fluid cooling liquid through the temperature sensor, adjusts the flow rate of air outside the cooling box through the speed regulating fan, and adjusts the strength of a magnetic field inside the cooling box through controlling the current of the electromagnet, so that the automobile can obtain good cooling effect under different operation conditions;
5. when the battery pack is operated or started at a lower ambient temperature, the electronic control unit monitors the temperature of the magnetic fluid cooling liquid through the temperature sensor, and the temperature of the magnetic fluid cooling liquid in the heat dissipation box is increased through the heating pipeline, so that the battery pack is heated, and the adjustable low-temperature heating capacity is realized.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiments of the application and together with the description serve to explain the application and do not constitute an undue limitation to the application.
FIG. 1 is an isometric view of a schematic of the exterior structure of the present utility model;
fig. 2 is an exploded view showing the overall structure of the present utility model applied to 3 vehicle-mounted battery cells;
FIG. 3 is a top view of a schematic diagram of the combined installation of a battery box, a microchannel separator box, a cold flow conduit assembly, a hot flow conduit assembly, a heat dissipating box, an electromagnet, and a U-shaped heating tube of the present utility model applied to 3 vehicle-mounted battery cells;
FIG. 4 is an exploded view of a schematic diagram of the structure of the heat dissipating box, electromagnet, U-shaped heating tube of the present utility model;
FIG. 5 is a top view of a schematic structural diagram of the heat dissipating box, electromagnet and U-shaped heating pipe of the present utility model after being assembled;
FIG. 6 is a cross-sectional view A-A of FIG. 5;
FIG. 7 is an isometric view of a schematic structural diagram of a radiator cap of the present utility model;
FIG. 8 is an isometric view of a schematic structural diagram of a microchannel separator tank of the present utility model;
fig. 9 is a view of fig. 8 in direction a;
fig. 10 is a view of fig. 8 in the direction B;
FIG. 11 is a sectional view B-B of FIG. 10;
FIG. 12 is a cross-sectional view of C-C of FIG. 10;
fig. 13 is a schematic diagram of a control circuit according to the present utility model.
Wherein:
1. a speed-regulating fan;
2. a radiator cover 2-1, radiator cover radiating fins 2-2, radiator cover shell 2-2-1 and radiator cover shell rabbets;
3. a heat flow conduit;
4. a heat flow conduit temperature sensor;
5. a battery case cover;
6. the battery box body 6-1, the battery box body liquid inlet through hole 6-2 and the battery box body liquid outlet through hole;
7. a circulation pump;
8. the heat dissipation box body 8-1, a heat dissipation box body liquid outlet hole 8-2, a heat dissipation box body liquid inlet hole 8-3, a U-shaped heating pipe mounting hole 8-4, a heat dissipation box body heat dissipation plate 8-4B, a heat dissipation box body heat dissipation plate 8-4C, a heat dissipation box body heat dissipation plate 8-4D, a heat dissipation box body heat dissipation plate 8-4E, a heat dissipation box body heat dissipation plate 8-4F, a heat dissipation box body heat dissipation plate 8-5, a permanent magnet mounting position 8-5B, a permanent magnet mounting position 8-5C, a permanent magnet mounting position 8-5D, a permanent magnet mounting position 8-6, a heat dissipation box body shell 8-6-1 and a heat dissipation box body shell spigot;
9. a cold flow pipe;
10. a cold flow pipe temperature sensor;
11. electromagnet 11B, electromagnet 11C, electromagnet 11D, electromagnet 11E, electromagnet 11F, electromagnet 11G, electromagnet 11H, electromagnet 11I, electromagnet 11J, electromagnet 11K, electromagnet 11L, electromagnet;
12. a battery cell 12B, a battery cell 12C, and a battery cell;
13. the micro-channel separator box 13-1, the inlet of the inlet main pipe 13-1-1, the inlet main pipe 13-2, the inlet branch pipe 13-2-1, the connecting branch pipe 13-2-2, the connecting branch pipe 13-2-3, the connecting branch pipe 13-2-4, the connecting branch pipe 13-2-5, the connecting branch pipe 13-2B, the inlet branch pipe 13-2B-1, the connecting branch pipe 13-2B-2, the connecting branch pipe 13-2B-5, the connecting branch pipe 13-2C, the inlet branch pipe 13-2C-1, the connecting branch pipe 13-2C-2, the connecting branch pipe 13-2C-3, the connecting branch pipe 13-2C-4, the connecting branch pipe 13-2D-1, the connecting branch pipe 13-2D-2, the connecting branch pipe 13-2D-3, the connecting branch pipe 13-2D-4, the connecting branch pipe 13-2D-5, the connecting branch pipe 13-2D-3, the connecting branch pipe 13-3C-3, the outlet main pipe 13-3 and the outlet main pipe 1;
14. a U-shaped heating pipe;
15. an electronic control unit ECU.
The specific embodiment is as follows:
the disclosure is further described below with reference to the drawings and examples.
It should be noted that the following detailed description is illustrative and is intended to provide further explanation of the present application. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.
In the present disclosure, terms such as "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "side", "bottom", and the like indicate an azimuth or a positional relationship based on the azimuth or the positional relationship shown in the drawings, are merely relational terms determined for convenience in describing structural relationships of the various components or elements of the present disclosure, and do not denote any one of the components or elements of the present disclosure, and are not to be construed as limiting the present disclosure.
In the present disclosure, terms such as "fixedly coupled," "connected," and the like are to be construed broadly and refer to either a fixed connection or an integral or removable connection; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the terms in the disclosure may be determined according to circumstances, and should not be interpreted as limiting the disclosure, for relevant scientific research or a person skilled in the art.
In order to more clearly explain the technical scheme, the method is applied to the electric automobile to carry out specific description of the embodiment. However, it should be clear to those skilled in the art that the present disclosure may be applied not only to thermal management of a battery pack of an electric vehicle, but also to other devices or application environments where it is required to ensure that a controlled object can perform cold and heat management, and that temperatures of the respective controlled objects are as consistent as possible.
Accordingly, the controlled object accommodated in the accommodating chamber is only required to be replaced and adapted correspondingly, (of course, the accommodating space, the size and the like of the accommodating chamber may be also required to be adapted, which are all known means of those skilled in the art and are not described herein in detail), and the respective control circuits and sensors are connected with other controllers, which may be the device itself or may be configured otherwise.
Meanwhile, it should be noted that the number of the controlled objects in the present disclosure may also be changed, and the controlled objects in the present embodiment are illustrated as batteries, and the number of the battery monomers may be variable (of course, the principle of other controlled objects is the same), for example, the number of the battery monomers may be extended to 5, 6, or even more, and of course, the number of the battery monomers may also be reduced, and of course, when the number of the battery monomers is changed, the number of the accommodating chambers in the micro-channel separator box may be adaptively changed along with the number of the battery monomers.
As shown in fig. 1 to 6 and 13, the present disclosure is mounted on a vehicle body and connected to an ECU15 of the vehicle, and includes a speed fan (or speed fan) 1, a heat radiation box cover 2, a heat flow pipe 3, a heat flow pipe temperature sensor 4, a battery box cover 5, a battery box 6, a circulation pump 7, a heat radiation box 8, a cold flow pipe 9, a cold flow pipe temperature sensor 10, an electromagnet 11, a battery cell 12B, a battery cell 12C, a micro-channel separator box 13, and a U-shaped heating pipe 14;
of course, the U-shaped heating tube may be replaced with other components or shapes in other embodiments, such as a spiral heating tube, etc.
As shown in fig. 2 and 8, the battery box 6 is a cuboid open shell made of heat insulation materials, the left side and the right side of the battery box 6 are respectively provided with a liquid outlet through hole 6-2 and a liquid inlet through hole 6-1, the position of the liquid inlet through hole 6-1 is matched with the position of a liquid inlet main pipe inlet 13-1-1 on the micro-channel baffle box 13, and the position of the liquid outlet through hole 6-2 is matched with the position of a liquid outlet main pipe outlet 13-4-1 on the micro-channel baffle box 13; the battery box cover 5 made of heat insulation material is arranged on the battery box body and forms a battery box with heat insulation function together with the battery box body 6;
as shown in fig. 2, 8 to 12, the microchannel separator box 13 is made of a heat-conducting insulating material, and the battery cells 12, 12B, 12C are respectively placed in the 3 rectangular spaces; the size of the outer wall of the micro-channel baffle box 13 is matched with the size of the inner wall of the battery box body 6, and the micro-channel baffle box 13 is installed in the battery box body 6; the liquid inlet header pipe 13-1 is positioned at the lower part of the front side wall surface of the micro-channel baffle box 13, the liquid inlet branch pipe 13-2B, the liquid inlet branch pipe 13-2C and the liquid inlet branch pipe 13-2D are vertically distributed at the front part of the micro-channel baffle box 13, the liquid outlet branch pipe 13-3B, the liquid outlet branch pipe 13-3C and the liquid outlet branch pipe 13-3D are vertically distributed at the rear part of the micro-channel baffle box 13, and the liquid outlet header pipe 13-4 is positioned at the upper part of the rear side wall surface of the micro-channel baffle box; the micro-channel system in the micro-channel baffle box 13 comprises four flow paths, wherein the first flow path consists of a liquid inlet main pipe 13-1, a liquid inlet branch pipe 13-2D, a connecting branch pipe 13-2D-1, a connecting branch pipe 13-2D-2, a connecting branch pipe 13-2D-3, a connecting branch pipe 13-2D-4, a connecting branch pipe 13-2D-5, a liquid outlet branch pipe 13-3D and a liquid outlet main pipe 13-4; the second flow route consists of a liquid inlet main pipe 13-1, a liquid inlet branch pipe 13-2C, a connecting branch pipe 13-2C-1, a connecting branch pipe 13-2C-2, a connecting branch pipe 13-2C-3, a connecting branch pipe 13-2C-4, a connecting branch pipe 13-2C-5, a liquid outlet branch pipe 13-3C and a liquid outlet main pipe 13-4; the third flow route consists of a liquid inlet main pipe 13-1, a liquid inlet branch pipe 13-2B, a connecting branch pipe 13-2B-1, a connecting branch pipe 13-2B-2, a connecting branch pipe 13-2B-3, a connecting branch pipe 13-2B-4, a connecting branch pipe 13-2B-5, a liquid outlet branch pipe 13-3B and a liquid outlet main pipe 13-4; the fourth flow path is composed of a liquid inlet main pipe 13-1, a liquid inlet branch pipe 13-2, a connecting branch pipe 13-2-1, a connecting branch pipe 13-2-2, a connecting branch pipe 13-2-3, a connecting branch pipe 13-2-4, a connecting branch pipe 13-2-5, a liquid outlet branch pipe 13-3 and a liquid outlet main pipe 13-4.
As shown in fig. 4, 5, 6 and 7, the heat radiation box 8 made of a magnetic shielding material is composed of a heat radiation box shell 8-6 and a heat radiation box fin 8-4, a heat radiation box fin 8-4B, a heat radiation box fin 8-4C, a heat radiation box fin 8-4D, a heat radiation box fin 8-4E, a heat radiation box fin 8-4F, the left and right wall surfaces of the heat radiation box shell 8-6 are respectively provided with a liquid inlet 8-2 and a liquid outlet 8-1, the heat radiation box fin 8-4B, the heat radiation box fin 8-4C, the heat radiation box fin 8-4D, the heat radiation box fin 8-4E, the heat radiation box fin 8-4F are cast with the heat radiation box shell 8-6 into a whole; the electromagnets 11B, 11C, 11D, 11E, 11F, 11 and 11G, 11H, 11I, 11J, 11K, 11L are symmetrically arranged on the front and rear inner walls of the heat-dissipating box shell 8-6; the electromagnet control circuit is connected with the electronic control unit ECU15, and the electronic control unit ECU15 controls the on and off of the electromagnet control circuit and adjusts the intensity of a magnetic field in the heat radiation box by adjusting the current of the electromagnet; the U-shaped heating pipe 14 is arranged on the right inner wall of the heat dissipation box body shell 8-6, a control circuit of the U-shaped heating pipe 14 is connected with the electronic control unit ECU15, and the electronic control unit ECU15 controls the connection and disconnection of the U-shaped heating pipe control circuit; the radiating box cover 2 made of magnetic shielding materials consists of a radiating box cover shell 2-2 and radiating box cover radiating fins 2-1, and the radiating box cover radiating fins 2-1 and the radiating box cover shell 2-2 are cast into a whole; the spigot 2-2-1 at the bottom of the radiator box cover shell 2-2 is nested with the spigot 8-6-1 at the top of the radiator box shell 8-6 to form a sealed radiator box with a magnetic shielding function, the speed regulating fan 1 is arranged right in front of the radiator box, and the electronic control unit ECU15 is connected with the speed regulating fan 1 and regulates the rotating speed of the speed regulating fan;
as shown in fig. 2, 3 and 13, the heat flow pipeline assembly consists of a heat flow pipeline 3 and a heat flow pipeline temperature sensor 4, wherein an inlet of the heat flow pipeline 3 passes through a liquid outlet through hole 6-2 of a battery box body 6 and is connected with a liquid outlet main pipe outlet 13-4-1 of a micro-channel baffle box 13, and an outlet of the heat flow pipeline 3 is connected with a liquid inlet hole 8-2 of a heat dissipation box body shell 8-6; the heat flow pipeline temperature sensor 4 is arranged near the inlet of the heat flow pipeline 3 and connected with the electronic control unit ECU15, and measures the temperature of the cooling liquid at the outlet position of the battery box; the cold flow pipeline assembly consists of a cold flow pipeline 9, a circulating pump 7 and a cold flow pipeline temperature sensor 10, wherein an inlet of the cold flow pipeline 9 is connected with a liquid outlet hole 8-1 of a heat dissipation box body shell 8-6, and an outlet of the cold flow pipeline 9 passes through a liquid inlet through hole 6-1 of a battery box body 6 and is connected with a liquid inlet main pipe inlet 13-1-1 of a micro-channel baffle box 13; the cold flow pipeline temperature sensor 10 is arranged near the inlet of the cold flow pipeline 9 and is connected with the electronic control unit ECU15, measures the temperature of the cooling liquid at the outlet position of the heat dissipation box, the circulating pump 7 is a constant displacement pump, is arranged on the cold flow pipeline 9 and is connected with the electronic control unit ECU15, and the electronic control unit ECU15 controls the opening and closing of the circulating pump 7.
The operation process applied to 3 vehicle-mounted battery monomers comprises the following steps:
the working medium used in the thermal management system is magnetic fluid cooling liquid, and the cooling liquid comprises magnetic refrigeration material nano particles, base carrier liquid, surfactant, antifreezing agent and NaOH; the base carrier liquid consists of 90% distilled water and 10% alcohol to lower the freezing point, the surfactant can prevent nano particles of the magnetic refrigeration material from agglomerating to ensure good fluidity of the magnetic fluid cooling liquid, and a proper amount of NaOH is added to ensure that the pH value of the magnetic fluid cooling liquid is about 10, so that the deterioration of the magnetic fluid cooling liquid can be effectively prevented, and the service life of the magnetic fluid cooling liquid is prolonged.
In the starting and running process of the automobile, the electronic control unit 15 controls the circulating pump 7 to be in a working state, and the circulating flow process of the magnetic fluid cooling liquid in the thermal management system is as follows: the magnetic fluid cooling liquid in the heat dissipation box flows out from the liquid outlet hole 8-1 of the heat dissipation box body, passes through the cold flow pipeline 9 and the circulating pump 7, passes through the liquid inlet hole 6-1 of the battery box body, and flows into the liquid inlet main pipe 13-1 from the liquid inlet main pipe inlet 13-1-1 of the micro-channel baffle plate box 13; the magnetic fluid cooling liquid in the liquid inlet main pipe 13-1 has four flow paths, wherein the first flow path is that the magnetic fluid cooling liquid flows into the liquid inlet branch pipe 13-2D through the liquid inlet main pipe 13-1, flows into the liquid outlet branch pipe 13-3D through the connecting branch pipe 13-2D-1, the connecting branch pipe 13-2D-2, the connecting branch pipe 13-2D-3, the connecting branch pipe 13-2D-4 and the connecting branch pipe 13-2D-5 respectively, and finally flows into the liquid outlet main pipe 13-4 from the liquid outlet branch pipe 13-3D; the second flow route is that the magnetic fluid cooling liquid flows into the liquid inlet branch pipe 13-2C through the liquid inlet main pipe 13-1, flows into the liquid outlet main pipe 13-3C through the connecting branch pipe 13-2C-1, the connecting branch pipe 13-2C-2, the connecting branch pipe 13-2C-3, the connecting branch pipe 13-2C-4 and the connecting branch pipe 13-2C-5 respectively, and finally flows into the liquid outlet main pipe 13-4 from the liquid outlet branch pipe 13-3C; the third flow route is that the magnetic fluid cooling liquid flows into the liquid inlet branch pipe 13-2B through the liquid inlet main pipe 13-1, flows into the liquid outlet main pipe 13-3B through the connecting branch pipe 13-2B-1, the connecting branch pipe 13-2B-2, the connecting branch pipe 13-2B-3, the connecting branch pipe 13-2B-4 and the connecting branch pipe 13-2B-5 respectively, and finally flows into the liquid outlet main pipe 13-4 from the liquid outlet branch pipe 13-3B; the fourth flow route is that the magnetic fluid cooling liquid flows into the liquid inlet branch pipe 13-2 through the liquid inlet main pipe 13-1, and flows into the liquid outlet main pipe 13-4 from the liquid outlet main pipe 13-3 through the connecting branch pipe 13-2-1, the connecting branch pipe 13-2-2, the connecting branch pipe 13-2-3, the connecting branch pipe 13-2-4 and the connecting branch pipe 13-2-5 respectively; the magnetic fluid cooling liquid of the liquid outlet header pipe 13-4 flows into the heat flow pipeline 3 through the liquid outlet header pipe outlet 13-4-1, passes through the liquid outlet through hole 6-2 of the battery box body, finally flows into the heat dissipation box through the liquid inlet hole 8-2 of the heat dissipation box body, and then carries out the next cycle. The length and the flow resistance of each flow route in the microchannel separator box tend to be consistent, namely the flow rate of the magnetic fluid cooling liquid in each flow route tends to be consistent; the length of the linear connecting branch pipe between each pair of the liquid inlet branch pipe and the liquid outlet branch pipe is far smaller than that of the bent connecting branch pipe, so that the temperature rise of the magnetic fluid cooling liquid in each flow route is lower when the magnetic fluid cooling liquid flows; the two ensure good temperature consistency of the battery pack.
The battery cell 12, the battery cell 12B and the battery cell 12C can exchange heat with the magnetic fluid cooling liquid in the micro-channel system through the micro-channel baffle box 13 with good heat conduction performance, the magnetic fluid cooling liquid flows into the heat dissipation box through the circulating flow process, and the magnetic fluid cooling liquid in the heat dissipation box exchanges heat with the heat dissipation box cooling fin 8-4, the heat dissipation box cooling fin 8-4B, the heat dissipation box cooling fin 8-4C, the heat dissipation box cooling fin 8-4D, the heat dissipation box cooling fin 8-4E, the heat dissipation box cooling fin 8-4F and the heat dissipation box cover cooling fin 2-1 through the heat dissipation box shell and the heat dissipation box cover shell.
When the heat flow pipeline temperature sensor 4 detects that the temperature of the magnetic fluid cooling liquid is higher than a set value, the electronic control unit ECU15 controls the electromagnet 11, the electromagnet 11B, the electromagnet 11C, the electromagnet 11D, the electromagnet 11E, the electromagnet 11F, the electromagnet 11G, the electromagnet 11H, the electromagnet 11I, the electromagnet 11J, the electromagnet 11K and the electromagnet 11L to be in a working state, a uniformly distributed magnetic field is formed inside the heat dissipation box, and the temperature of the magnetic fluid cooling liquid in the heat dissipation box is increased after the magnetic fluid cooling liquid is magnetized; simultaneously, the electronic control unit ECU15 opens the speed regulating fan 1 to convey external air to the radiating box radiating fins 8-4, the radiating box radiating fins 8-4B, the radiating box radiating fins 8-4C, the radiating box radiating fins 8-4D, the radiating box radiating fins 8-4E, the radiating box radiating fins 8-4F and the radiating box cover radiating fins 2-1 to radiate the radiating box, so that the temperature of the magnetic fluid cooling liquid in the radiating box is close to the ambient temperature; because the material of the heat dissipation box is a magnetic shielding material, no magnetic field exists outside the heat dissipation box, and after the magnetic fluid coolant flows out of the heat dissipation box, the magnetic refrigeration material nano particles which are in a magnetized state are demagnetized to generate temperature drop, so that the temperature of the magnetic fluid coolant is further reduced to be lower than the ambient temperature; the radiating box structure with radiating fins combines with the active air cooling design to realize good radiating effect, and the magnetic fluid cooling liquid further generates temperature drop when the magnetic refrigeration material demagnetizes, thereby greatly improving the high-temperature radiating capability of the thermal management system.
The electronic control unit ECU15 monitors the temperature of the magnetic fluid cooling liquid at the outlet of the battery box and the outlet of the heat dissipation box through the hot flow pipeline temperature sensor 4 and the cold flow pipeline temperature sensor 10; when the temperature of the magnetic fluid cooling liquid at the outlet of the battery box and the outlet of the heat dissipation box is too high, the electronic control unit ECU15 increases the magnetic field inside the heat dissipation box by increasing the current of the electromagnet, so that the temperature of the magnetic fluid cooling liquid is further reduced due to the fact that the magnetic refrigeration material nano particles are demagnetized, and meanwhile, the electronic control unit ECU15 increases the air flow speed by increasing the rotating speed of the speed regulation fan 1, so that the heat dissipation efficiency of the heat dissipation box is further improved; therefore, the battery pack can obtain good heat dissipation effect under different working conditions of the automobile.
When the temperature sensor 4 of the heat flow pipeline detects that the temperature of the magnetic fluid cooling liquid is lower than a set value, the electronic control unit ECU15 controls the U-shaped heating pipe 14 to be in a working state, and meanwhile, the electronic control unit ECU15 turns off the electromagnet and the speed regulating fan 1; the U-shaped heating pipe 14 heats the low-temperature magnetic fluid cooling liquid in the heat dissipation box, and the heated magnetic fluid cooling liquid does not generate temperature drop after flowing out of the heat dissipation box due to the existence of no magnetic field, and directly flows into a micro-channel system of the micro-channel baffle box 13 to heat the battery cell 12, the battery cell 12B and the battery cell 12C; when the heat flow pipeline temperature sensor 4 monitors that the temperature of the magnetic fluid cooling liquid at the outlet of the battery box is increased to the lowest normal working temperature of the battery pack, the electronic control unit ECU15 cuts off the control circuit of the U-shaped heating pipe 14, so that the system realizes adjustable low-temperature heating capacity.
When the heat flow pipeline temperature sensor 4 detects that the temperature of the magnetic fluid cooling liquid is in the normal temperature range of the battery pack, the electronic control unit ECU15 only enables the circulating pump 7 to be in a working state, and the speed regulating fan 1, the electromagnet and the U-shaped heating pipe 14 are all in a non-working state.
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.
While the specific embodiments of the present disclosure have been described above with reference to the drawings, it should be understood that the present disclosure is not limited to the embodiments, and that various modifications and changes can be made by one skilled in the art without inventive effort on the basis of the technical solutions of the present disclosure while remaining within the scope of the present disclosure.
Claims (10)
1. A temperature control system, characterized by: the heat radiation device comprises a heat radiation box, a containing box, a heat flow pipeline, a cold flow pipeline and a driving piece, wherein one side of the heat radiation box is connected with one side of the containing box through the heat flow pipeline, the other side of the heat radiation box is connected with the other side of the containing box through the cold flow pipeline to form a loop, the driving piece is arranged on the loop to drive the circulation flow of internal fluid, and temperature sensors are arranged on the heat flow pipeline and the cold flow pipeline;
the heat dissipation box comprises a heat dissipation box body, wherein a plurality of heat dissipation fins are sequentially sleeved on the outer edge of the heat dissipation box body, a plurality of electromagnets corresponding to one another are arranged on at least two opposite inner walls of the inner surface of the heat dissipation box body, and a heating pipeline is arranged in the heat dissipation box body;
the accommodating box comprises an external heat insulation box body and an internal micro-channel baffle box, the micro-channel baffle box comprises a plurality of accommodating chambers separated by micro-channel baffles, a plurality of connecting pipelines in the transverse direction and the longitudinal direction are arranged in the front wall surface and the rear wall surface of the micro-channel baffle box body, a plurality of connecting branch pipes are arranged in the micro-channel baffles, and the connecting branch pipes are communicated with the connecting pipelines;
the working state of the permanent magnet or the heating pipeline is controlled, so that the fluid flowing out of the heat dissipation box reaches the set temperature, circulates in the loop under the action of the driving piece, and cools or heats the acted object accommodated in the accommodating chamber.
2. A temperature control system as claimed in claim 1, wherein: the heat insulation box body is a cuboid open shell made of heat insulation materials, liquid inlet through holes and liquid outlet through holes are respectively formed in the left side and the right side of the box body, the positions of the liquid inlet through holes are matched with the positions of the inlets of the liquid inlet main pipes on the micro-channel baffle plate box, and the positions of the liquid outlet through holes are matched with the positions of the outlets of the liquid outlet main pipes on the micro-channel baffle plate box.
3. A temperature control system as claimed in claim 1, wherein: the fluid channel of the microchannel separator box comprises a liquid inlet main pipe, a liquid inlet branch pipe, a connecting branch pipe, a liquid outlet branch pipe and a liquid outlet main pipe; the liquid inlet main pipe is positioned at the lower part of the front side wall surface of the micro-channel baffle box, the liquid inlet branch pipes are vertically distributed at the front part of the micro-channel baffle box, the liquid outlet branch pipes are vertically distributed at the rear part of the micro-channel baffle box, and the liquid outlet main pipe is positioned at the upper part of the rear side wall surface of the micro-channel baffle box; the liquid inlet main pipe is connected with each liquid inlet branch pipe, the liquid outlet main pipe is connected with each liquid outlet branch pipe, and each pair of liquid inlet branch pipes and liquid outlet branch pipes are connected by a group of connecting branch pipes.
4. A temperature control system as claimed in claim 1, wherein: the heat dissipation box comprises a heat dissipation box shell and heat dissipation fins, wherein liquid inlet holes and liquid outlet holes are respectively formed in the left wall surface and the right wall surface of the heat dissipation box shell, a group of heat dissipation fins which are uniformly arranged are cast into a whole with the heat dissipation box shell, and the heat dissipation fins are arranged in parallel and have the same interval.
5. A temperature control system as claimed in claim 1, wherein: and a speed regulating fan is arranged on the outer side of the heat dissipation box.
6. A temperature control system as claimed in claim 1, wherein: the radiating box is made of magnetic shielding materials, a radiating box cover is detachably connected to the radiating box cover, the radiating box cover comprises a radiating box cover shell and radiating fins, and the radiating fins and the radiating box cover shell are cast into a whole.
7. A temperature control system as set forth in claim 6, wherein: the bottom of the heat dissipation box cover shell is provided with a spigot, and the spigot and the inside and outside of the spigot at the top of the heat dissipation box body shell are nested together to form a sealed heat dissipation box with a magnetic shielding function.
8. A battery pack thermal management system, characterized by: a temperature control system comprising any one of claims 1-7, each battery cell being disposed within each containment chamber.
9. An electric automobile group battery thermal management system, characterized by: the battery pack thermal management system according to claim 8, wherein the electromagnet is controlled by a control circuit, and the control circuit is connected with an electronic control unit of the electric automobile, and the electronic control unit is also connected with a heating pipeline control circuit, temperature sensors of a hot-flow pipeline and a cold-flow pipeline and a driving piece.
10. The method for operating a thermal management system for a battery pack of an electric vehicle of claim 9, wherein: when the temperature of the magnetic fluid cooling liquid is detected to be lower than a set value, the heating pipeline is controlled to work, the permanent magnet is controlled to be not operated, the magnetic fluid cooling liquid is heated, and the normal working temperature environment of the battery pack is ensured;
when the temperature of the magnetic fluid cooling liquid is detected to be higher than a preset value, the permanent magnet is controlled to work, the heating pipeline is controlled to be not work, a uniformly distributed magnetic field is formed in the heat dissipation box, the temperature of the magnetic refrigeration material nano particles in the magnetic fluid cooling liquid in the heat dissipation box is increased after the magnetic refrigeration material nano particles are magnetized, the temperature of the magnetic fluid cooling liquid is increased, the heat dissipation is carried out by using the heat dissipation fins, no magnetic field exists outside the heat dissipation box, and after the magnetic fluid cooling liquid flows out of the heat dissipation box, the temperature of the magnetic refrigeration material nano particles which are originally in a magnetized state in the magnetic fluid cooling liquid is reduced to generate temperature reduction, so that the temperature of the magnetic fluid cooling liquid is reduced to be below the ambient temperature, and the normal working temperature environment of the battery pack is ensured.
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| CN112423546B (en) * | 2020-10-28 | 2022-03-11 | 武汉第二船舶设计研究所(中国船舶重工集团公司第七一九研究所) | Liquid cooling heat dissipation system with micro-channel |
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| CN114243149B (en) * | 2021-10-12 | 2023-09-15 | 杭州伯坦新能源科技有限公司 | Lithium ion battery pack based on magnetorheological fluid and intelligent temperature control method thereof |
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