WO2017202147A1 - Système d'équilibrage thermique à multiples changements de phase destiné à être utilisé dans un bloc-batterie au lithium d'un véhicule électrique - Google Patents

Système d'équilibrage thermique à multiples changements de phase destiné à être utilisé dans un bloc-batterie au lithium d'un véhicule électrique Download PDF

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Publication number
WO2017202147A1
WO2017202147A1 PCT/CN2017/079577 CN2017079577W WO2017202147A1 WO 2017202147 A1 WO2017202147 A1 WO 2017202147A1 CN 2017079577 W CN2017079577 W CN 2017079577W WO 2017202147 A1 WO2017202147 A1 WO 2017202147A1
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Prior art keywords
phase change
liquid phase
lithium battery
heat
solid
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PCT/CN2017/079577
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English (en)
Chinese (zh)
Inventor
钱小飞
Original Assignee
钱小飞
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Publication date
Application filed by 钱小飞 filed Critical 钱小飞
Priority to CN201780001441.5A priority Critical patent/CN109328415A/zh
Publication of WO2017202147A1 publication Critical patent/WO2017202147A1/fr

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Classifications

    • 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
    • B60L50/00—Electric propulsion with power supplied within the vehicle
    • B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
    • B60L50/60—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • 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
    • H01M10/62—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
    • H01M10/656—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
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/659—Means for temperature control structurally associated with the cells by heat storage or buffering, e.g. heat capacity or liquid-solid phase changes or transition
    • 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
    • H01M10/66—Heat-exchange relationships between the cells and other systems, e.g. central heating systems or fuel cells
    • H01M10/663—Heat-exchange relationships between the cells and other systems, e.g. central heating systems or fuel cells the system being an air-conditioner or an engine
    • 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
    • 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
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10—Technologies relating to charging of electric vehicles
    • Y02T90/16—Information or communication technologies improving the operation of electric vehicles

Definitions

  • the present invention relates to a multi-phase phase change heat balance system for an electric vehicle lithium battery package, which is used for all-weather heat management of an electric vehicle lithium battery core.
  • An electric vehicle uses a lithium battery pack as a power source to drive the vehicle.
  • the battery of the lithium battery is suitable for charging and discharging in a temperature range of 20-4 o °c, in order to exert the maximum performance of the lithium battery.
  • the lithium battery is charging
  • Heat is generated during the discharge process, so that the temperature of the lithium battery exceeds the above-mentioned suitable temperature range, thereby affecting the performance and safety of the lithium battery, for example, the battery cannot be fully charged during charging or the amount of electricity discharged during the discharge is much smaller than the set value. , affecting the cruising range of electric vehicles.
  • some heat conducting devices are used to derive the heat of the lithium battery core (such as air cooling, water cooling), such as a single thermal management system using a solid-solid or solid-liquid composite phase change material composed of a plurality of phase change materials. .
  • the solid-solid or solid-liquid phase change material itself has low thermal conductivity and its heat storage performance is very good, so these materials are not suitable for use as a heat conducting device, which is not conducive to the rapid derivation of lithium battery core heat.
  • the temperature of the lithium battery cell is lower than the above-mentioned suitable temperature range, the charging and discharging performance thereof will be significantly decreased, especially when the operating environment of the electric vehicle is a cold region lower than o °c, the charging of the electric vehicle The discharge performance will drop by more than 35%, which will adversely affect the cruising range of electric vehicles.
  • the lithium battery has a risk of explosion. Therefore, after the ambient temperature is lower than the above-mentioned suitable temperature range, the lithium battery of the electric vehicle is insulated and heated to maintain the lithium battery core within a suitable temperature range, which will facilitate the lithium battery to exert maximum charging and discharging performance and prevent electric vehicles. The cruising range is reduced and its safety is guaranteed.
  • the technical problem to be solved by the present invention is to provide a multi-phase phase change heat balance system for an electric vehicle lithium battery package, which can exchange heat with the lithium battery core more quickly.
  • the present invention provides a multi-phase phase change heat balance system, comprising: a gas-liquid phase change heat conduction channel containing a gas-liquid phase change material, and the gas-liquid phase change heat conduction channel includes at least one extension channel And a cylinder for accommodating the lithium battery, the hollow wall of all the cylinders is in communication with the extension channel, and the outer wall of the lithium battery is adapted to closely fit the inner wall of the cylinder or to be filled with a thermal adhesive for heat transfer.
  • each cylinder is respectively filled with a solid-liquid phase change energy storage body (specifically: a container filled with a solid-liquid phase change composite material, and the wall body is suitable for rapid heat conduction (preferably a metal container)), the solid
  • the liquid phase change energy storage body contains at least three groups, and each group of solid-liquid phase change energy storage bodies contains solid-liquid phase change materials with different working temperature ranges (ie, solid-liquid phase change composite materials), respectively: Solid-liquid phase change material at 10 ⁇ 20°C, solid-liquid phase change material with working temperature range of 20 ⁇ 30°C and solid-liquid phase change material with working temperature range of 35 ⁇ 45°C.
  • the solid-liquid phase change material with an operating temperature range of 10 to 20 ° C accounts for 30%
  • the solid-liquid phase change material with an operating temperature range of 20 to 30 ° C accounts for 40%, and the working temperature.
  • Solid-liquid phase change materials with a range of 35 ⁇ 45 °C account for 30 ⁇ 3 ⁇ 4.
  • the extended end of the extension channel is provided with a vehicle-mounted cold heat exchanger, and the vehicle-mounted cold heat exchanger is a cold and heat output end of the vehicle air-conditioning system.
  • the vehicle-mounted cold heat exchanger includes a plurality of heat transfer fins and heat transfer tubes, the heat transfer sheets are parallel to each other, and the extending passages pass through the heat transfer sheets and are heat-transferred to the heat transfer sheets, and the heat transfer tubes pass through the respective heat transfer tubes.
  • the heat sheet is heat-transferred and connected to each heat transfer sheet, and the heat transfer tube is connected to the heat transfer connection of the vehicle air conditioning system (specifically: the heat transfer tube and the condensation tube of the vehicle air conditioning system, the heat exchange water tank and/or the heating wire, etc. Parts are connected).
  • the multi-phase phase change heat balance system further includes a heat balance processing unit, and the heat balance processing unit includes: a controller connected to the ECU of the electric vehicle, and a plurality of temperature sensors connected to the controller; the controller is adapted to pass the temperature sensor Or the thermal sensor collects the ambient temperature, the temperature of the gas-liquid phase change material, and the temperature of the solid-liquid phase change energy storage body, and the controller is electrically connected to the vehicle air conditioning system and the vehicle power system of the electric vehicle through the ECU control.
  • Vehicle power systems include: on-board gasoline or diesel engines, or hydrogen fuel cells and other power sources
  • the present invention also provides a method for operating a multi-phase phase change heat balance system, comprising:
  • the lithium battery core derives heat into the solid-liquid phase change energy storage body through the gas-liquid phase change heat conduction channel, and the solid-liquid phase change energy storage body absorbs heat in the working temperature range of each phase change material.
  • the cooling mode of the vehicle air conditioning system is started, and the vehicle air conditioning system exchanges heat with the lithium battery through the vehicle cold heat exchanger and the gas-liquid phase heat conduction channel;
  • the solid-liquid phase change energy storage body emits heat and transmits the heat to the lithium battery through the gas-liquid phase change heat conduction channel, and when the temperature of the solid-liquid phase change energy storage body is detected again After the set lower limit value is reached, the heating mode of the vehicle air conditioning system is started, and the vehicle air conditioning system exchanges heat with the lithium battery through the vehicle cold heat exchanger and the gas-liquid phase heat conduction channel.
  • the upper limit of the temperature setting is 30 ° C
  • the lower limit is 10 ° C
  • the upper limit of the temperature setting is 35 °C, no setting lower limit
  • the ambient temperature is higher than 30 °C, if the lithium battery is in charge and discharge state, the upper limit of temperature setting is 40 °C, otherwise the upper limit of temperature setting is 45 ° C, no lower limit is set.
  • the vehicle air conditioning system When the vehicle air conditioning system is started, if the lithium battery is in a discharged or deactivated state, the vehicle air conditioning system is powered by the vehicle's vehicle power system; if the lithium battery is in a charging state, the vehicle air conditioning system is powered by the charging pile.
  • the present invention also provides a solid-liquid phase change mixture for a multi-phase phase change heat balance system, comprising: 30% solid-liquid phase change material with an operating temperature range of 10-20 ° C, 40% The solid-liquid phase change material with working temperature range of 20 ⁇ 30 °C and 30% solid-liquid phase change material with working temperature range of 35 ⁇ 45 °C.
  • the gas-liquid phase change heat conduction channel has a thermal conductivity much higher than that of the metal, and the gas-liquid phase change heat conduction channel is used to conduct heat, thereby improving heat transfer efficiency with the lithium battery core, and accommodating the column of the single lithium battery core.
  • the heat transfer between the inside of the cylinder and the lithium battery can make the heat transfer contact area of the lithium battery core and the gas-liquid phase variable heat conduction channel larger, further improving the heat transfer efficiency of the lithium battery core;
  • the column barrel is connected with the extension channel, and can be composed of a lithium battery core
  • the lithium battery and the cold and heat sources other than the lithium battery are more convenient for heat exchange.
  • the solid-liquid phase change energy storage body disposed on the outer side of the cylinder can absorb heat and store or release the stored heat as needed, and when the lithium battery is heated, the stored energy can be absorbed to delay the heating rate of the lithium battery.
  • the stored heat can be released to delay the cooling rate of the lithium battery, so that the lithium battery is kept within the set operating temperature range for a longer period of time, and the operating temperature range is 10 ⁇ . 20. C, 20 ⁇ 30. C and 35 ⁇ 45.
  • C three solid-liquid phase change materials can keep the lithium battery core at the optimum temperature in the longer turn, which is beneficial to the lithium battery to maintain normal charging and discharging performance, and it is also beneficial to reduce external cooling or heating.
  • the frequency of heat exchange between the equipment and the lithium battery plays a role in energy saving and emission reduction.
  • the vehicle-mounted cold heat exchanger is an intermediate part of the heat exchange between the vehicle air-conditioning system and the lithium battery core.
  • the refrigeration or heating of the vehicle air-conditioning system is utilized.
  • the function is to exchange heat with the lithium battery through the on-board cold heat exchanger and the gas-liquid phase heat conduction channel, so that the temperature of the lithium battery core is kept within a controllable range.
  • the heat balance processing unit analyzes and controls the working time, working state and vehicle air conditioning of the vehicle air conditioning system by collecting the ambient temperature, the temperature of the solid-liquid phase change energy storage body, and the charging, discharging or deactivating state of the lithium battery core.
  • the power source of the system realizes the all-weather automation of the operation of the multi-phase phase change heat balance system.
  • the gas-liquid phase change heat conduction channel or the solid-liquid phase change energy storage body is first used to control the temperature change, and finally the vehicle air conditioning system is used to control the temperature change thereof.
  • the lithium battery core can be kept in the required temperature range for a longer period of time, which can save energy and reduce emissions.
  • the vehicle air conditioning system can be used to forcibly cool or heat the lithium battery core, so that the lithium battery core can be kept under control. Within the temperature range.
  • Lithium battery charging state ⁇ Lithium battery charging state ⁇ , the vehicle air conditioning system is powered by the power supply pile, which can effectively save the energy of the vehicle power system, effectively reduce the load of the vehicle power system, and improve energy utilization efficiency.
  • FIG. 1 is a three-dimensional schematic diagram of a multi-phase phase change heat balance system of the present invention
  • FIG. 2 is a front elevational view of a multi-phase phase change heat balance system of the present invention.
  • FIG 3 is a cross-sectional view along line A-A of the multi-phase phase change heat balance system of the present invention.
  • the multi-phase phase change heat balance system of the present invention comprises: a solid-liquid phase change energy storage body 1, a gas-liquid phase change heat conduction channel 2, an extension channel 21, a column 22, and a lithium battery.
  • Core 3 on-vehicle cold heat exchanger 4, heat transfer fins 41, heat transfer tubes 42.
  • the gas-liquid phase change heat conduction channel 2 includes a pair of parallel extending passages 21 and a plurality of cylinders 22 vertically passing through the pair of extending passages 21, all of which are in communication with the extending passages 21, and each of the cylindrical tubes 22 is adapted to For accommodating a single lithium battery cell 3, the outer side wall of each lithium battery cell 3 is closely matched with the inner wall of the cylinder 22 (it may also be filled with a heat conductive medium such as a thermal conductive silica gel), and the circumferential outer side of each cylinder 22 is filled with a solid liquid phase. Change energy storage body 1. The portion of the extension passage 21 adjacent to the cylinder 22 is wider than the rest of the extension passage 21.
  • the extended end of the extension channel 21 is provided with a vehicle-mounted cold heat exchanger 4, and the vehicle-mounted cold heat exchanger 4 includes a heat transfer fin 41 and a heat transfer tube 42.
  • the plurality of heat transfer fins 41 are arranged in parallel and equidistantly.
  • the extension channel 21 passes through the plurality of heat transfer fins 41 and is fixedly coupled to each of the heat transfer fins 41, and the heat transfer tubes 42 located between the pair of extension passages 21 pass through the plurality of heat transfer fins 41 and A heat transfer connection is fixed to each of the heat transfer sheets 41.
  • the heat transfer tube 42 is thermally coupled to a vehicle air conditioning system (not shown), and the vehicle air conditioning system is electrically connected to and controlled by a thermal management system (BMS), and the BMS collects ambient temperature and temperature through the thermal sensor.
  • BMS thermal management system
  • the BMS is electrically connected to the onboard power system of the electric vehicle to regulate the power source of the vehicle air conditioning system.
  • the solid-liquid phase change energy storage body 1 comprises at least three groups separated from each other, and each set of solid-liquid phase change energy storage body 1 is provided with a solid-liquid phase change mixture composed of three kinds of solid-liquid phase change materials.
  • the operating temperature ranges of the three solid-liquid phase change materials are: 10 ⁇ 20°C in the low temperature zone (all solid phase below 10°C, full liquid phase above 20°C), and 20 ⁇ 30 in the medium temperature zone. °C (all solid phase below 20 °C, full liquid phase above 30 °C), material in high temperature zone is 3 5 ⁇ 45°C (all solid phase below 35°C, full liquid phase above 45°C), the three materials independently work in the corresponding temperature range without mutual interference.
  • the mass ratio of the three materials in the solid-liquid phase change mixture is: 30% in the low temperature zone, 40% in the medium temperature zone, and 30% in the high temperature zone.
  • the mass ratio of the three materials is not limited to the above ratio, and can be selected according to the external ambient temperature range in which the lithium battery is long-term.
  • Each solid-liquid phase change material has its own phase change temperature threshold, which has the effect of absorbing or releasing heat significantly within the threshold range. When the threshold value is exceeded, the heat is no longer absorbed or released.
  • the above three kinds of solid-liquid phase change materials may be phase change wax energy storage plates produced by Shanghai Joule Wax Co., Ltd., or may be produced by units such as China Aerospace Science and Industry Group and Aerospace Haiying (Zhenjiang) Special Materials Co., Ltd.
  • the solid-liquid phase change material can also be referred to Patent Documents CN103131395A, CN101982518A, CN10477674 3A, and the like.
  • the gas-liquid phase change heat-conducting channel 2 is provided with a gas-liquid phase change material, as shown in Table 1, the heat transfer efficiency of the gas-liquid phase change material is hundreds to thousands of high-heat-conducting metal silver.
  • the gas-liquid phase change heat conduction channel 2 containing the gas-liquid phase change material can exchange heat with the lithium battery core 3 more quickly, ensuring that the lithium battery core 3 does not generate thermal imbalance, and can compensate for the low thermal conductivity of the solid-liquid phase change material.
  • the insufficiency solves the structural complexity and uneconomical problems of conventional air-cooled and water-cooled systems.
  • the working process of the multi-phase phase change heat balance system of the present invention comprises the following steps:
  • the temperature of the body 1 reaches 30 ° C, and the materials in the low temperature zone and the medium temperature zone are all converted into a liquid phase, and the ability of the entire solid-liquid phase change energy storage body 1 to continue to store heat is weakened, and the BMS detects the solid-liquid phase change energy storage body.
  • the temperature of 1 reaches 30 °C, and the cooling mode of the vehicle air conditioning system is started.
  • the vehicle air conditioning system exchanges heat with the gas-liquid phase heat conduction channel 2 through the vehicle cold heat exchanger 4, and accelerates the heat generated by the lithium battery core 3 from the gas phase.
  • the variable heat conduction channel 2 is derived, thereby preventing the temperature of the lithium battery core 3 from continuing Continue to rise.
  • the heating mode of the vehicle air conditioning system is started, and the vehicle air conditioning system passes the vehicle hot and cold heat.
  • the exchanger 4 exchanges heat with the gas-liquid phase change heat conduction channel 2, and transfers the heat generated by the vehicle air conditioning system to the lithium battery cell 3 through the gas-liquid phase change heat conduction channel 2, thereby preventing the temperature of the lithium battery core 3 from continuing to drop, so that the next lithium battery
  • the core 3 is designed to work directly into an efficient operating state.
  • the temperature of the body 1 reaches 35 ° C, and the materials in the low temperature zone and the medium temperature zone are all converted into a liquid phase, and the ability of the entire solid-liquid phase change energy storage body 1 to continue to store heat is weakened, and the BMS detects the solid-liquid phase change energy storage body.
  • the temperature of 1 reaches 35 °C, and the cooling mode of the vehicle air conditioning system is started.
  • the vehicle air conditioning system exchanges heat with the gas-liquid phase heat conduction channel 2 through the vehicle cold heat exchanger 4, and accelerates the heat generated by the lithium battery core 3 from the gas phase.
  • the variable heat conduction channel 2 is led out, thereby preventing the temperature of the lithium battery cell 3 from continuing to rise.
  • the ambient temperature can keep the temperature of the lithium battery cell 3 within 20-30 ° C, and the lithium battery cell 3 can directly enter the high-efficiency operation state after the next working.
  • the heat generated by the lithium battery cell 3 is first transmitted to the gas-liquid phase change heat conduction channel 2 through the column 22 and is diverged from the gas-liquid phase change heat conduction channel 2,
  • the heat of the helium is transferred from the gas-liquid phase to the heat-conducting channel 2 to the surrounding solid-liquid phase change energy storage body 1, and the solid-liquid phase change energy storage body 1 absorbs heat in the working temperature range of each phase change material until the solid-liquid phase changes energy storage.
  • the temperature of the body 1 reaches 40 ° C, and the materials in the low temperature zone and the medium temperature zone are all converted into a liquid phase, and a part of the material in the high temperature zone has also been converted into a liquid.
  • the ability of the entire solid-liquid phase change energy storage body 1 to continue to store heat is weakened, and the BMS detects that the temperature of the solid-liquid phase change energy storage body 1 reaches 40 ° C.
  • the cooling mode of the vehicle air conditioning system is started, and the vehicle air conditioning system is cooled by the vehicle.
  • the heat exchanger 4 exchanges heat with the gas-liquid phase change heat conduction passage 2 to accelerate the heat generated by the lithium battery core 3 from the gas-liquid phase change heat conduction passage 2, thereby preventing the temperature of the lithium battery core 3 from continuing to rise.
  • the cooling mode of the vehicle air conditioning system is started, and the vehicle air conditioning system passes through the vehicle cold heat exchanger 4 and the gas liquid phase change.
  • the heat conduction channel 2 performs heat exchange, and accelerates the heat in the lithium battery core 3 from the gas-liquid phase change heat conduction channel 2, thereby preventing the temperature of the lithium battery core 3 from continuing to rise and exceeding the operating temperature limit value of the lithium battery core by 45 °C.
  • the vehicle air conditioning system when it is required to activate the vehicle air conditioning system, if the BMS detects that the lithium battery cell 3 is in a discharged or deactivated state, the vehicle air conditioning system is controlled to be powered by the vehicle power system of the electric vehicle; if the BMS detects When the lithium battery cell 3 is in a charging state, the vehicle air conditioning system is controlled to be powered by the charging post.

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  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
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  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
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  • Air-Conditioning For Vehicles (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)

Abstract

L'invention concerne un système d'équilibrage thermique à multiples changements de phase destiné à être utilisé dans un bloc-batterie au lithium d'un véhicule électrique. Le système comprend un canal thermoconducteur à changement de phase gaz-liquide comprenant un matériau thermoconducteur à changement de phase gaz-liquide. Le canal thermoconducteur à changement de phase gaz-liquide comprend au moins un canal d'extension et au moins un cylindre logeant une cellule de batterie au lithium. Le cylindre comporte une paroi creuse communiquant avec le canal d'extension. Une paroi extérieure de la cellule au lithium est appropriée pour s'adapter étroitement à une paroi intérieure du cylindre, ou une colle thermoconductrice remplit l'espace entre la paroi extérieure de la cellule au lithium et la paroi intérieure du cylindre pour assurer une conduction thermique. Un matériau de stockage d'énergie à changement de phase liquide-solide est disposé au niveau d'un côté extérieur circonférentiel de tous les cylindres, respectivement. Le matériau de stockage d'énergie à changement de phase liquide-solide comprend au moins trois ensembles de matériaux de stockage d'énergie à changement de phase liquide-solide. Chaque ensemble de matériaux de stockage d'énergie à changement de phase liquide-solide fonctionne dans un intervalle de température différent. Quand la température de la cellule de batterie au lithium augmente, les matériaux de stockage d'énergie à changement de phase liquide-solide peuvent absorber et stocker de l'énergie thermique afin de réduire la vitesse d'augmentation de température ; tandis que quand la température de la cellule de batterie au lithium diminue, les matériaux de stockage d'énergie à changement de phase liquide-solide peuvent libérer l'énergie thermique précédemment stockée afin de réduire la vitesse de diminution de température. Par conséquent, le mode de réalisation peut maintenir, pendant une plus longue période de temps, la température de la cellule de batterie au lithium dans une plage de température de fonctionnement préconfigurée.
PCT/CN2017/079577 2016-05-26 2017-04-06 Système d'équilibrage thermique à multiples changements de phase destiné à être utilisé dans un bloc-batterie au lithium d'un véhicule électrique WO2017202147A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201780001441.5A CN109328415A (zh) 2016-05-26 2017-04-06 电动汽车锂电包用多式相变热衡***

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Application Number Priority Date Filing Date Title
CN201620490607.7 2016-05-26
CN201620490607.7U CN205752445U (zh) 2016-05-26 2016-05-26 电动汽车锂电包用多式相变热衡***

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CN113453473B (zh) * 2021-07-08 2023-08-25 深圳市科信通信技术股份有限公司 一种支持700MHz和DRAN的通信机柜

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CN108321448A (zh) * 2018-03-05 2018-07-24 西南交通大学 一种高效的轨道交通储能热管理***及其热管理方法
CN108321448B (zh) * 2018-03-05 2023-07-28 西南交通大学 一种高效的轨道交通储能热管理***及其热管理方法
CN113644337A (zh) * 2021-07-02 2021-11-12 北京机械设备研究所 一种混合供电方舱的热管理***及热管理方法
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CN116231168A (zh) * 2023-05-10 2023-06-06 中国第一汽车股份有限公司 动力电池箱体及动力电池保温控制方法

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