CN111883878B - Two-phase immersed battery liquid cooling system with multiple modules sharing one constant-pressure device - Google Patents

Two-phase immersed battery liquid cooling system with multiple modules sharing one constant-pressure device Download PDF

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Publication number
CN111883878B
CN111883878B CN202010811711.2A CN202010811711A CN111883878B CN 111883878 B CN111883878 B CN 111883878B CN 202010811711 A CN202010811711 A CN 202010811711A CN 111883878 B CN111883878 B CN 111883878B
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battery
liquid
box body
storage chamber
air storage
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CN111883878A (en
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李羽白
李洋
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Dalian University of Technology
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Dalian University of Technology
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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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
    • B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
    • B60L58/24—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries
    • B60L58/26—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries by cooling
    • 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
    • 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
    • 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
    • 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
    • H01M10/6569—Fluids undergoing a liquid-gas phase change or transition, e.g. evaporation or condensation
    • 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
    • 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
    • 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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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Power Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Secondary Cells (AREA)
  • Battery Mounting, Suspending (AREA)

Abstract

The invention belongs to the technical field of power batteries, and provides a two-phase immersed battery liquid cooling system with a multi-module sharing a constant-pressure device. The vaporization of the fluoridation liquid on the surface of the battery is utilized to take away the heat generated by the battery in the working process, the vaporized fluoridation liquid is condensed on the surface of the upper cover plate of the box body and the inside of the air storage chamber, and the heat released by the condensation is absorbed by the cooling working medium in the cooling coil, so that the highest temperature of the battery and the temperature difference between different battery monomers are effectively controlled. Compared with the traditional two-phase immersion battery liquid cooling device, the device has the following advantages: the pulse pressure in the box body is buffered by utilizing the position movement of the piston in the air storage chamber, so that the box body does not need to bear the pressure load of the pulse, and the stability of the system is improved; the condensation rate of the fluoridized liquid vapor can be changed along with the change of the heat generating rate of the battery, so that the temperature and the pressure in the battery box body can be controlled to be basically stable.

Description

Two-phase immersed battery liquid cooling system with multiple modules sharing one constant-pressure device
Technical Field
The invention belongs to the technical field of power batteries, and particularly relates to a two-phase immersed battery liquid cooling system with multiple modules sharing a constant-pressure device
Background
The new energy automobile has great advantages in the aspects of environmental protection and energy utilization, and is a power battery of the heart of the new energy automobile, which is paid attention to by a plurality of enterprises. The lithium battery is widely applied to the electric automobile due to the advantages of high energy density, long cycle life and the like. Temperature is a major factor affecting the electricity storage and safety of lithium batteries, and working at too high a temperature leads to rapid degradation of battery performance and even thermal runaway. Therefore, designing an efficient battery thermal management system is a necessary condition for improving the overall performance of the electric automobile.
The current battery thermal management modes mainly include: air-cooled, liquid-cooled, phase change material cooled, direct refrigerant cooled, and two-phase submerged battery liquid cooled, which are currently of interest to many scholars. For example Tan Saicong et al in the patent "sealed immersion battery pack based on a fluorinated liquid and its cooling system" (patent number: 201822187949.3) proposed immersing the entire battery module in a fluorinated liquid, which is in direct contact with the battery surface, has a strong heat-extracting capacity, and has no contact thermal resistance. The phase change of the fluorinated liquid is fully utilized in the whole heat dissipation process, so that the heat dissipation efficiency is high and the energy consumption is low.
Two-phase immersion liquid cooling, while having many advantages, requires the battery case to be closed. Because the battery has pulse pressure in the box body in the working process, the service life of the battery box body can be shortened due to long-time bearing of pulse stress load. In view of the problems of the two-phase immersion liquid cooling, the invention provides a two-phase immersion battery liquid cooling system with a multi-module sharing a constant pressure device, and the pulse pressure in a box body is buffered by utilizing the position movement of a piston in an air storage chamber, so that the box body does not need to bear alternating pressure load, and the stability of the system is improved.
Disclosure of Invention
The invention solves the technical problem of providing a two-phase immersed battery liquid cooling system with a multi-module sharing one constant-pressure device. The pulse pressure in the box body is buffered by utilizing the position movement of the piston in the air storage chamber, so that the box body does not need to bear alternating pressure load, and the stability of the system is improved.
The technical scheme of the invention is as follows:
a two-phase submerged battery liquid cooling system sharing a constant pressure device for a multi-module, wherein the two-phase submerged battery liquid cooling system with pressure buffering devices which are communicated with each other comprises: a battery module, a constant voltage module, and a cooling module;
Wherein, group battery module includes: a battery 1, a box body 2, a fluoride solution 3, a liquid phase communicating pipe 4, a gas phase communicating pipe 5 and a box body upper cover plate 6; wherein the battery 1 is positioned at the bottom of the box body 2; the liquid phase communicating pipe 4 is connected to the lower positions of the two sides of the box body 2, the gas phase communicating pipe 5 is connected to the upper positions of the two sides of the box body 2, and the liquid phase communicating pipe 4 and the gas phase communicating pipe are respectively used for balancing the liquid level and the vapor pressure of the fluorinated liquid 3 in different battery modules; when the battery is in an operating state, the battery begins to generate heat. In the initial stage of heat dissipation, the fluorinated liquid does not reach the boiling point, and the fluorinated liquid utilizes sensible heat to absorb heat generated by the battery in the working process. As the operation of the battery proceeds, when the fluorinated liquid reaches the boiling point, the fluorinated liquid starts to boil, and heat released from the battery is absorbed by using latent heat. The fluoridized liquid steam generated by boiling is condensed on the surface of the upper cover plate 6 of the box body, and the heat released by the condensation is taken away by the cooling working medium in the cooling coil 7.
The constant voltage module includes: a gas reservoir 8, a piston 9 and a spring 10; the air storage chamber is connected with the box body through a liquid phase communicating pipe 4 and an air connecting pipe 5. The piston 9 is positioned in the air storage chamber and is connected with the air storage chamber through a spring 10. The cooling module includes: a cooling coil 7, a compressor 11, a condenser 12, and a throttle valve 13 for circulating a refrigerant; the cooling coil 7, the compressor 11, the condenser 12 and the throttle valve 13 are connected in turn by pipes to form a loop. The air storage chamber 8 is connected with the box body through the liquid phase communicating pipe 4 and the air connecting pipe 5, and the space formed between the air storage chamber and the box body is airtight.
The upper end of the air storage chamber 8 is provided with a cooling pipeline which is connected with a cooling module.
The height of the lower edge of the air storage chamber 8 is higher than or equal to the height of the liquid level of the fluorizating liquid in the box body.
The piston 9 can move left and right in the air storage chamber 8, and in the initial state that the battery is not in operation, the piston 9 is positioned at the leftmost end of the air storage chamber 8.
The spring 10 has a small stiffness coefficient and can sensitively buffer the pulse pressure in the box.
The invention has the beneficial effects that:
1) The pulse pressure in the box body is buffered by utilizing the position movement of the piston in the air storage chamber, so that the box body does not need to bear alternating pressure load, and the stability of the system is improved;
2) The condensation rate of the fluoridized liquid vapor can be changed along with the change of the heat generating rate of the battery, so that the temperature and the pressure in the battery box body can be controlled to be basically stable.
Drawings
FIG. 1 is a schematic diagram of a two-phase submerged battery liquid cooling system with multiple modules sharing a constant voltage device.
In the figure: 1, a battery; 2, a box body; 3, fluoridation liquid; 4, communicating the liquid phase; 5a gas phase communicating pipe; 6, a box upper cover plate; 7, cooling coil pipes; 8, an air storage chamber; 9, a piston; 10 springs; 11 compressors; a 12 condenser; 13 throttle valve.
Detailed Description
The following describes the embodiments of the present invention further with reference to the drawings and technical schemes.
In order that the invention may be readily understood, a more complete description of the invention will be rendered by reference to the appended drawings. It should be understood that the description is only intended to further illustrate the features and advantages of the invention, and not to limit the scope of the claims.
The invention discloses a two-phase immersed battery liquid cooling system with a constant voltage device shared by multiple modules, which is communicated with each other and provided with a pressure buffer device, and comprises: a battery module, a constant voltage module, and a cooling module;
Wherein, group battery module includes: a battery 1, a box body 2, a fluoride solution 3, a liquid phase communicating pipe 4, a gas phase communicating pipe 5 and a box body upper cover plate 6; wherein the battery 1 is positioned at the bottom of the box body 2; the liquid phase communicating pipe 4 is connected to the lower positions of the two sides of the box body 2, the gas phase communicating pipe 5 is connected to the upper positions of the two sides of the box body 2, and the liquid phase communicating pipe 4 and the gas phase communicating pipe are respectively used for balancing the liquid level and the vapor pressure of the fluorinated liquid 3 in different battery modules; when the battery is in an operating state, the battery begins to generate heat. In the initial stage of heat dissipation, the fluorinated liquid does not reach the boiling point, and the fluorinated liquid utilizes sensible heat to absorb heat generated by the battery in the working process. As the operation of the battery proceeds, when the fluorinated liquid reaches the boiling point, the fluorinated liquid starts to boil, and heat released from the battery is absorbed by using latent heat. The fluoridized liquid steam generated by boiling is condensed on the surface of the upper cover plate 6 of the box body, and the heat released by the condensation is taken away by the cooling working medium in the cooling coil 7.
The constant voltage module includes: a gas reservoir 8, a piston 9 and a spring 10; the air storage chamber is connected with the box body through a liquid phase communicating pipe 4 and an air connecting pipe 5. The piston 9 is positioned in the air storage chamber and is connected with the air storage chamber through a spring 10. The cooling module includes: a cooling coil 7, a compressor 11, a condenser 12, and a throttle valve 13 for circulating a refrigerant; the cooling coil 7, the compressor 11, the condenser 12 and the throttle valve 13 are connected in turn by pipes to form a loop. The air storage chamber 8 is connected with the box body through the liquid phase communicating pipe 4 and the air connecting pipe 5, and the space formed between the air storage chamber and the box body is airtight.
As shown in fig. 1, a schematic diagram of a two-phase submerged battery liquid cooling system with a multi-module common to one constant voltage device is shown, and in this example, a square battery pack of 1 module and 6 blocks is taken as an example, and the whole system is described. The battery 1 is placed at the bottom of the case 2 and is partially or totally immersed in the fluorinated liquid 3, in this example, the vast majority of the battery is immersed in the fluorinated liquid 3.
The fluorinated liquid 3 is an insulating flame retardant liquid and has a boiling point of 0 to 50 ℃ at 1 atmosphere, and in this example, HFE-7000 fluorinated liquid produced by 3M formula is used, which has a boiling point of 34 ℃ and has good dielectric characteristics and excellent flame retardance.
The upper end of the air storage chamber 8 is provided with a cooling pipeline which is connected with a cooling module, so that heat released by condensing the fluoridized liquid steam in the air storage chamber can be timely transferred to the outside. The height of the lower edge of the air storage chamber 8 should be higher than or equal to the height of the liquid level of the fluorinated liquid in the tank, in this example, the height of the lower edge of the air storage chamber 8 is kept level with the liquid level of the fluorinated liquid in the tank, so that the condensed fluorinated liquid 3 can be guaranteed to smoothly flow back into the tank. The spring 8 employed in this example has a small stiffness coefficient and thus can sensitively cushion the pulse pressure in the tank. In the initial state of the battery not in operation, the piston 9 is positioned at the leftmost end of the air storage chamber 8, and when the battery is in operation, the piston 9 can move a corresponding distance according to the steam pressure in the tank body.
In this example, 3 battery modules are shown, and it can be seen that the liquid phase communicating tube 4 connects each battery module in series, so that the fluorinated liquid can flow in the battery modules, and the liquid level of the fluorinated liquid in each battery box is kept consistent by using the communicating vessel principle. In this example, the liquid phase communicating tube 4 is a PVC transparent steel wire hose, and is connected to the tank body by a strong metal clip to achieve sealing. The gas-phase communicating pipe 5 connects each cell box in series, and the fluorinated liquid vapor can circulate in the cell boxes, so that the pressure of the fluorinated liquid vapor in each cell box is kept consistent, and the boiling point of the fluorinated liquid in each box is kept consistent. In this example, the gas-phase communicating tube 5 is a PVC transparent steel wire hose, and is connected to the tank body by a strong metal clip to achieve sealing.
As shown in fig. 1, the battery module includes: a battery 1, a box body 2, a fluoride solution 3, a liquid phase communicating pipe 4, a gas phase communicating pipe 5 and a box body upper cover plate 6; when the battery is in an operating state, the battery begins to generate heat. In the initial stage of heat dissipation, the fluorinated liquid does not reach the boiling point, and the fluorinated liquid utilizes sensible heat to absorb heat generated by the battery in the working process. As the operation of the battery proceeds, when the fluorinated liquid reaches the boiling point, the fluorinated liquid starts to boil, and heat released from the battery is absorbed by using latent heat. The fluoridized liquid steam generated by boiling is condensed on the surface of the upper cover plate 6 of the box body, and the heat released by the condensation is taken away by the cooling working medium in the cooling coil 7.
As shown in fig. 1, the constant voltage module includes: a gas reservoir 8, a piston 9 and a spring 10; when the battery is in a high-rate discharge state, the heat generation power of the battery pack is increased. At this time, the temperature of the fluoridized liquid steam in the battery box body gradually rises, the steam pressure also increases, the steam pushes the piston to move rightwards, and part of fluoridized liquid steam enters the air storage chamber 8. Because the upper portion of the air storage chamber 8 is connected with the cooling module, the fluoride liquid steam entering the air storage chamber 8 can be condensed in the air storage chamber 8, and the condensed fluoride liquid 3 flows back into the battery box through the liquid phase communicating pipe 4 to complete the circulation of the fluoride liquid. The discharge multiplying power of the battery is not constant in the running process of the vehicle, so that the pressure of the fluoride liquid steam also changes along with time, and the higher the pressure of the fluoride liquid steam is, the larger the rightward movement amplitude of the piston is, so that the larger the condensation area contacted by the fluoride liquid steam is. The condensation area increases to accelerate the condensation rate of the fluoride liquid vapor so as to reduce the pressure of the fluoride liquid vapor, and finally the heat generation amount of the battery pack and the heat dissipation amount of the cooling module reach a mutually balanced state.
As shown in fig. 1, the cooling module includes: a cooling coil 7, a compressor 11, a condenser 12 and a throttle valve 13. The working medium circulated in the cooling module is a refrigerant, and the refrigerant adopted in the example is R134a. The refrigerant absorbs the heat released by the condensation of the fluoridized liquid vapor on the surface of the upper cover plate of the box body and in the air storage chamber in the cooling coil 7 to be vaporized, and the vaporized refrigerant is compressed by the compressor 11 and then liquefied in the condenser 12 to transfer the heat to the external environment. The liquefied refrigerant returns to the cooling coil 7 after passing through the throttle valve 13, and the circulation of the refrigerant is completed.
In summary, the present invention discloses a two-phase submerged battery liquid cooling system with a multi-module sharing a constant pressure device, which utilizes the position movement of a piston inside an air storage chamber to buffer the pulse pressure inside the box body, so that the box body does not need to bear alternating pressure load, and the stability of the system is improved, and meanwhile, the condensation rate of the fluoridized liquid vapor can change along with the change of the heat generating rate of the battery, so that the heat generating capacity of the battery and the heat dissipating capacity of a cooling module reach a state of mutual equilibrium, i.e. the temperature and the pressure of the battery remain basically stable.
The foregoing specific examples have been provided to illustrate the technical solutions and advantages of the present disclosure in detail, and it should be understood that the foregoing description is only exemplary of the present disclosure and is not intended to limit the present disclosure. The dimensions and shapes of the elements in the drawings do not reflect actual dimensions and proportions, but merely represent the contents of the present example. Any modifications, improvements, and equivalents that fall within the spirit and scope of the present disclosure.

Claims (3)

1. The two-phase immersed battery liquid cooling system with the multi-module sharing the constant voltage device is characterized in that the two-phase immersed battery liquid cooling system with the multi-module sharing the constant voltage device comprises a battery module, a constant voltage module and a cooling module;
The battery pack module comprises a battery (1), a box body (2), a fluoride liquid (3), a liquid phase communicating pipe (4), a gas phase communicating pipe (5) and a box body upper cover plate (6); wherein the battery (1) is positioned at the bottom of the box body (2); the liquid phase communicating pipe (4) is connected to the lower positions of the two sides of the box body (2), the gas phase communicating pipe (5) is connected to the upper positions of the two sides of the box body (2), and the liquid phase communicating pipe (4) and the gas phase communicating pipe (5) are respectively used for balancing the liquid level and the vapor pressure of the fluorinated liquid (3) in different battery modules; when the battery (1) is in a working state, the battery (1) starts to generate heat; in the initial stage of heat dissipation, the fluorinated liquid (3) does not reach the boiling point, and the fluorinated liquid (3) utilizes sensible heat to absorb heat generated by the battery (1) in the working process; as the operation of the battery (1) is continued, when the fluorinated liquid (3) reaches the boiling point, the fluorinated liquid (3) starts to boil, and the heat released by the battery (1) is absorbed by utilizing latent heat; the fluoridized liquid steam generated by boiling is condensed on the surface of the upper cover plate (6) of the box body, and the heat released by the condensation is taken away by the cooling working medium in the cooling coil (7);
The constant pressure module comprises an air storage chamber (8), a piston (9) and a spring (10); the air storage chamber (8) is connected with the box body (2) through the liquid phase communicating pipe (4) and the air connecting pipe (5) respectively, and a space formed between the air storage chamber and the box body (2) is airtight; the piston (9) is positioned in the air storage chamber (8) and is connected with the air storage chamber (8) through a spring (10); the piston (9) moves left and right in the air storage chamber (8), and in the initial state that the battery (1) does not work, the piston (9) is positioned at the leftmost end of the air storage chamber (8);
the cooling module comprises a cooling coil (7), a compressor (11), a condenser (12) and a throttle valve (13) for circulating the refrigerant; the cooling coil (7), the compressor (11), the condenser (12) and the throttle valve (13) are connected into a ring through pipelines in sequence.
2. The two-phase submerged battery liquid cooling system sharing a constant voltage device according to claim 1, wherein the upper end of the air storage chamber (8) is provided with a cooling pipeline, and the cooling pipeline is connected with the cooling module.
3. The two-phase submerged battery liquid cooling system sharing a constant pressure device according to claim 1 or 2, wherein the height of the lower edge of the air storage chamber (8) is higher than or equal to the height of the level of the fluorinated liquid in the tank (2).
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CN113193262A (en) * 2021-04-27 2021-07-30 湖北亿纬动力有限公司 Liquid cooling battery box and system
CN113363616B (en) * 2021-06-17 2022-05-20 中国第一汽车股份有限公司 Pressure-adjustable liquid cooling plate, power battery assembly and vehicle
CN114678624B (en) * 2022-03-14 2022-09-09 大连理工大学 Two-phase immersed battery liquid cooling device for super quick charging of lithium battery and cooling system thereof

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