WO2024037147A1 - Battery thermal management system, battery pack, vehicle, and battery pack design method - Google Patents

Battery thermal management system, battery pack, vehicle, and battery pack design method Download PDF

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Publication number
WO2024037147A1
WO2024037147A1 PCT/CN2023/099370 CN2023099370W WO2024037147A1 WO 2024037147 A1 WO2024037147 A1 WO 2024037147A1 CN 2023099370 W CN2023099370 W CN 2023099370W WO 2024037147 A1 WO2024037147 A1 WO 2024037147A1
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WO
WIPO (PCT)
Prior art keywords
battery
management system
thermal management
phase change
tube
Prior art date
Application number
PCT/CN2023/099370
Other languages
French (fr)
Chinese (zh)
Inventor
卢军
董昊旻
李黎黎
岳振东
南海
兰超
尹炳江
Original Assignee
中国第一汽车股份有限公司
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Publication date
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Publication of WO2024037147A1 publication Critical patent/WO2024037147A1/en

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Classifications

    • 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
    • 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
    • B60L58/27—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 heating
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F30/00—Computer-aided design [CAD]
    • G06F30/20—Design optimisation, verification or simulation
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/61—Types of temperature control
    • H01M10/615—Heating or keeping warm
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/61—Types of temperature control
    • H01M10/617—Types of temperature control for achieving uniformity or desired distribution of temperature
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
    • H01M10/625—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
    • H01M10/653—Means for temperature control structurally associated with the cells characterised by electrically insulating or thermally conductive materials
    • 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
    • H01M10/6567—Liquids
    • H01M10/6568—Liquids characterised by flow circuits, e.g. loops, located externally to the cells or cell casings
    • 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
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
    • H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
    • H01M50/209—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for prismatic or rectangular cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/244—Secondary casings; Racks; Suspension devices; Carrying devices; Holders characterised by their mounting method
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/249—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders specially adapted for aircraft or vehicles, e.g. cars or trains
    • 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

Definitions

  • This application relates to the field of battery technology, for example, to a battery thermal management system, a battery pack, a vehicle, and a design method for a battery pack.
  • a battery refers to a device that can convert chemical energy into electrical energy.
  • a battery is usually composed of many cells connected in a certain series or parallel manner to form an assembly with corresponding rated voltage and rated capacity. Due to different purposes, batteries have different shapes. .
  • When installing the battery core it is usually necessary to use a mounting platform or mounting frame with a corresponding structure to fix the battery core.
  • As the core component of an electric vehicle the battery's structural safety and thermal management performance are very important.
  • the mainstream battery assembly solutions in related technologies are standard modules or cell to pack (Cell to Pack, CTP) configurations. These two solutions have complex structures, and the installation platform or mounting frame that supports the battery assembly only plays a supporting role. , resulting in poor thermal management performance of the battery.
  • This application provides a design method for a battery thermal management system, a battery pack, a vehicle, and a battery pack to improve the thermal management efficiency of battery cells.
  • the battery thermal management system includes:
  • a liquid-cooled box which stores a phase change fluid
  • a heat transfer pipe is installed in the liquid cooling box, and a heat transfer fluid circulates in the heat transfer pipe;
  • An insulating tube is installed through the liquid cooling box and is spaced apart from the heat conduction tube. Insulating fluid is stored in the insulating tube.
  • This application also provides a battery pack, including a battery core and the battery thermal management system as described above.
  • the battery core is bonded and fixed to the top of the liquid cooling box.
  • the present application also provides a vehicle, including a cooling circulation system and a battery pack as described above.
  • the cooling circulation system is connected to the heat conduction pipe in the battery pack, and the cooling circulation system is configured to conduct heat to the battery pack.
  • the tube leads to the heat transfer fluid.
  • This application also provides a battery pack design method for designing the battery pack as described above, so The design method described above includes the following steps:
  • the limit size S 1 of the battery thermal management system CMR*CC*GCR*cosA*cosA*cosA, where CC is the system-related structural coefficient of the battery core, and CC
  • the value range is 0.45 to 0.82, A is the supplementary parameter of dimensional tolerance, 12°>A>0°;
  • the phase change size of the battery thermal management system is determined according to the limit size S1 .
  • the phase change size of the battery thermal management system includes the material phase change thickness D and the overall phase change thickness H.
  • the size of the insulation tube and the size of the heat transfer tube are determined by the overall phase change thickness H;
  • the bottom dimension CMR, the installation limit dimension GCR, the limit dimension S 1 , the material phase change thickness D and the overall phase change thickness H are corrected and fed back according to the simulation results.
  • Figure 1 is a schematic structural diagram of the battery pack according to the embodiment
  • Figure 2 is an exploded view of the structure of the battery pack according to the embodiment
  • Figure 3 is a structural cross-sectional view of the battery pack according to the embodiment.
  • FIG. 4 is a flow chart of the battery pack design method according to the embodiment.
  • connection should be understood in a broad sense.
  • it can be a fixed connection, a detachable connection, or an integral body.
  • It can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be an internal connection between two elements or an interaction between two elements.
  • the term “above” or “below” a first feature on a second feature may include the first feature being in direct contact with the second feature, or it may include the first and second features being in direct contact with each other. Features are not in direct contact but through other features between them.
  • the terms “above”, “above” and “above” a first feature on a second feature include the first feature being directly above and diagonally above the second feature, or simply mean that the first feature is higher in level than the second feature.
  • “Below”, “under” and “under” the first feature is the second feature includes the first feature being directly below and diagonally below the second feature, or simply means that the first feature is less horizontally than the second feature.
  • this embodiment provides a battery thermal management system 1, which is configured to support the battery core 2.
  • the battery thermal management system 1 includes a liquid cooling box 11, a heat conduction pipe 13 and an insulation pipe 15.
  • the liquid cooling The phase change fluid 12 is stored in the box 11; the heat transfer pipe 13 is passed through the liquid cooling box 11, and the heat transfer fluid 14 circulates in the heat transfer pipe 13; the insulation pipe 15 is passed through the liquid cooling box 11 and is spaced apart from the heat transfer pipe 13 It is set that the insulation fluid 16 is stored in the insulation tube 15 .
  • the phase change fluid 12 is stored in the liquid-cooling box 11.
  • a battery core 2 When a battery core 2 generates excessive heat due to high-load operation or abnormal operation, that is, the heat generated by the battery core 2 is higher than expected, and excessive heat
  • the liquid-cooled box 11 can be transferred to another battery core 2 that is running at low load or is operating abnormally, that is, the heat generated by the other battery core 2 is lower than expected. By adjusting the heat transfer, the relationship between the battery core 2 and the battery can be improved.
  • the temperature consistency between the cores 2, and the phase change fluid 12 can improve the heat transfer efficiency and improve the effect of uniform heat conduction, and the phase change fluid 12 can transfer heat to the heat transfer tube 13 and the insulation tube 15, so that the inside of the heat transfer tube 13
  • the heat transfer fluid 14 heats up and transfers heat to the outside through the heat transfer fluid 14.
  • the heat preservation fluid 16 in the heat preservation tube 15 heats up, and the heat preservation fluid 16 can achieve the heat preservation effect; when the battery core 2 stops operating After that, the insulation fluid 16 can transfer heat to the phase change fluid 12 and the liquid cooling box 11 through the insulation tube 15, and transfer the heat to the battery core 2 through the liquid cooling box 11, so that the heat is disposed on the liquid cooling box 11.
  • the battery core 2 can ensure temperature consistency and can be started synchronously in a low-temperature environment. For example, in winter, since the insulation fluid 16 can preserve heat, the battery core 2 installed on the liquid cooling box 11 can ensure temperature consistency.
  • the heat-conducting tube 13 is arranged below the heat-insulating tube 15, that is, the heat-insulating tube 15 is arranged above the heat-conducting tube 13.
  • the heat-insulating tube 15 is close to the battery core 2, which is more conducive to transferring heat to the battery core in a low-temperature environment. 2, so that the battery core 2 arranged on the liquid cooling box 11 can ensure temperature consistency.
  • a storage cavity is provided inside the liquid cooling box 11, and the phase change fluid 12 is stored in the storage cavity.
  • a section of the heat transfer tube 13 passing through the storage cavity and a section of the heat preservation pipe 15 passing through the storage cavity are soaked in the phase change fluid. in fluid 12.
  • the phase change fluid 12 is in direct contact with the heat transfer pipe 13 and the insulation pipe 15, which can improve the heat transfer efficiency.
  • the heat transfer pipe 13 includes a first bending section 131 extending to the outside of the liquid cooling box 11
  • the insulation tube 15 includes a second bending section 151 extending to the outside of the liquid cooling box 11 to facilitate the first bending.
  • the section 131 and the second bent section 151 are provided with temperature detection elements, such as temperature sensors, to detect the temperatures of the heat conduction tube 13 and the insulation tube 15 .
  • both the heat transfer tube 13 and the insulation tube 15 are arranged in a serpentine array structure, which can increase the contact area between the heat transfer tube 13 and the insulation tube 15 and the phase change fluid 12 and improve the uniformity of heat transfer.
  • both the heat-conducting tube 13 and the thermal insulation tube 15 are made of heat-conducting metal materials, such as aluminum alloy, iron alloy, or titanium alloy.
  • the heat conduction tube 13 and the insulation tube 15 of this embodiment are made of aluminum alloy.
  • the battery pack includes a battery core 2 and a battery thermal management system 1 as in Embodiment 1.
  • the battery core 2 is bonded and fixed to the top of the liquid cooling box 11 .
  • glue is used to bond the battery cores 2 to the top of the liquid-cooling box 11 to reduce the impact of galvanic corrosion and achieve an integrated design; and multiple battery cores 2 are spaced on the top of the liquid-cooling box 11 , adjusting the heat of the battery core 2, such as transferring the heat generated by one battery core 2 or transferring the heat to another battery core 2, can improve the temperature consistency between the battery core 2 and the battery core 2.
  • This embodiment provides a vehicle, which includes a cooling circulation system and a battery pack as in Embodiment 2.
  • the cooling circulation system is connected to the heat transfer pipe 13 in the battery pack, and the cooling circulation system is configured to pass the heat transfer fluid 14 into the heat transfer pipe 13 .
  • the cooling circulation system can provide new low-temperature heat transfer fluid 14 to the heat transfer pipe 13 to keep the heat transfer pipe 13 at a low temperature, and the heated heat transfer fluid 14 in the heat transfer pipe 13 can circulate back to the cooling circulation system for recycling.
  • the cooling circulation system of this embodiment can refer to the phase Cooling equipment in related technologies, such as air conditioners.
  • the cooling circulation system of this embodiment is not shown in the drawings.
  • the port of the insulation tube 15 is provided with a sealing structure, and the sealing structure is configured to seal the insulation fluid 16 within the insulation tube 15 .
  • Embodiment 4 is a diagrammatic representation of Embodiment 4:
  • this embodiment provides a battery pack design method for designing the battery pack as in Embodiment 2.
  • the design method includes the following steps:
  • step S100 the battery core 2 performs a charge and discharge cycle. If the battery core 2 is an electric vehicle (EV) battery, the number of charge and discharge cycles is 2000 times, so that the battery core 2 expands to the maximum state. If the battery core 2 Cell 2 is a hybrid electric vehicle (HEV) battery cell or a plug-in hybrid electric vehicle (PHEV) battery cell. The number of charge and discharge cycles is 3000 times, so that the battery cell 2 expands to its maximum state; cosA refers to the cosine of A.
  • EV electric vehicle
  • PHEV plug-in hybrid electric vehicle
  • CC is 0.45, 0.46, 0.50, 0.55, 0.60, 0.65, 0.70, 0.75, 0.80, 0.82, optional, A is 1°, 1.5°, 2°, 2.5°, 3°, 4°, 5°, 6°, 7°, 8°, 9°, 10°, 11°.
  • the phase change size of the battery thermal management system 1 includes the material phase change thickness D and the overall phase change thickness H.
  • step S200 optionally, E is 1.53, 1.55, 1.60, 1.65, 1.70, 1.75, 1.80, 1.93; optionally, B is 42.1°, 42.3°, 42.5°, 43°, 43.5°, 44° , 44.5°, 44.9°.
  • step S300 the overall phase change thickness H is greater than three times the sum of the diameters of the insulation tube 15 and the heat transfer tube 13 .
  • step S400 the bottom size CMR, installation limit size GCR, limit size S1, material
  • the phase change thickness D and the overall phase change thickness H are corrected and fed back based on the simulation results of computer-aided engineering (Computer Aided Engineering, CAE) software or computer fluid dynamics (Computational Fluid Dynamics, CFD) software.
  • CAE Computer Aided Engineering
  • CFD Computer Fluid Dynamics
  • the battery pack produced by the design method of this embodiment has a higher degree of integration.
  • This application provides a design method for a battery thermal management system, a battery pack, a vehicle, and a battery pack to improve the thermal management efficiency of battery cells.
  • the vehicle of this application includes a battery pack.
  • the battery pack includes a battery thermal management system and a battery core.
  • the battery core is installed on the battery thermal management system.
  • the battery thermal management system includes a liquid cooling box, a heat conduction tube and an insulation tube.
  • the battery heat management system is located in the liquid cooling box. Store phase change fluid. When a battery cell generates too much heat due to high load operation or abnormal operation, the excess heat can be transferred to another low load or abnormal operation battery cell through the liquid cooling box, which can improve the battery cell quality.
  • the phase change fluid can improve the heat transfer efficiency and the effect of uniform heat conduction, and the phase change fluid can transfer heat to the heat transfer tube and the insulation tube, causing the heat transfer fluid in the heat transfer tube to heat up and The heat is transferred to the outside through the heat transfer fluid, and the insulation fluid in the insulation tube heats up.
  • the insulation fluid can achieve the insulation effect; when the battery core stops running, the insulation fluid can transfer the heat to the phase change fluid and the liquid cooling box through the insulation tube.
  • the liquid-cooled box transfers heat to the battery core, so that the battery core installed on the liquid-cooled box can ensure temperature consistency and can be started synchronously in a low-temperature environment.

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  • Engineering & Computer Science (AREA)
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  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Power Engineering (AREA)
  • Theoretical Computer Science (AREA)
  • Sustainable Development (AREA)
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  • Life Sciences & Earth Sciences (AREA)
  • Transportation (AREA)
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  • Aviation & Aerospace Engineering (AREA)
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Abstract

The present application discloses a battery thermal management system, a battery pack, a vehicle, and a battery pack design method. The battery thermal management system is configured to support battery cells, the battery thermal management system comprises a liquid cooled box, a thermally conducting pipe, and a heat preservation pipe, and the liquid cooled box has stored therein a phase change fluid; the thermally conducting pipe passes through the liquid cooled box, and a thermally conducting fluid circulates in the thermally conducting pipe; the heat preservation pipe passes through the liquid cooled box and is arranged spaced apart from the thermally conducting pipe, and a heat preservation fluid is stored in the heat preservation pipe.

Description

电池热管理系统、电池包、车辆及电池包的设计方法Design methods for battery thermal management systems, battery packs, vehicles and battery packs
本申请要求在2022年08月17日提交中国专利局、申请号为202210984677.8的中国专利申请的优先权，以上申请的全部内容通过引用结合在本申请中。This application claims priority to the Chinese patent application with application number 202210984677.8, which was submitted to the China Patent Office on August 17, 2022. The entire content of the above application is incorporated into this application by reference.
技术领域Technical field
本申请涉及电池技术领域，例如涉及一种电池热管理系统、电池包、车辆及电池包的设计方法。This application relates to the field of battery technology, for example, to a battery thermal management system, a battery pack, a vehicle, and a design method for a battery pack.
背景技术Background technique
电池是指能将化学能转化为电能的装置，电池通常是由很多个电芯按照一定的串联或并联方式组成相应额定电压、额定容量的总成，由于使用目的的不同，电池有不同的形状。在安装电芯时，通常需要使用相应结构的安装台或者安装架对电芯进行固定，而电池作为电动汽车的核心部件，其结构安全和热管理性能非常重要。相关技术中主流的电池总成方案是标准模组或者电池-电池包(Cell to Pack，CTP)构型，这两种方案结构复杂，支撑电池总成的安装台或者安装架只起到支撑作用，导致电池的热管理性能差。A battery refers to a device that can convert chemical energy into electrical energy. A battery is usually composed of many cells connected in a certain series or parallel manner to form an assembly with corresponding rated voltage and rated capacity. Due to different purposes, batteries have different shapes. . When installing the battery core, it is usually necessary to use a mounting platform or mounting frame with a corresponding structure to fix the battery core. As the core component of an electric vehicle, the battery's structural safety and thermal management performance are very important. The mainstream battery assembly solutions in related technologies are standard modules or cell to pack (Cell to Pack, CTP) configurations. These two solutions have complex structures, and the installation platform or mounting frame that supports the battery assembly only plays a supporting role. , resulting in poor thermal management performance of the battery.
发明内容Contents of the invention
本申请提供了一种电池热管理系统、电池包、车辆及电池包的设计方法，以提高对电芯的热管理效率。This application provides a design method for a battery thermal management system, a battery pack, a vehicle, and a battery pack to improve the thermal management efficiency of battery cells.
本申请提供一种电池热管理系统，设置为支撑电芯，所述电池热管理系统包括：This application provides a battery thermal management system configured to support battery cells. The battery thermal management system includes:
液冷箱体，所述液冷箱体内储存有相变流体；A liquid-cooled box, which stores a phase change fluid;
导热管，穿设于所述液冷箱体，所述导热管内流通有导热流体；A heat transfer pipe is installed in the liquid cooling box, and a heat transfer fluid circulates in the heat transfer pipe;
保温管，穿设于所述液冷箱体且与所述导热管间隔设置，所述保温管内储存有保温流体。An insulating tube is installed through the liquid cooling box and is spaced apart from the heat conduction tube. Insulating fluid is stored in the insulating tube.
本申请还提供一种电池包，包括电芯以及如上所述的电池热管理系统，所述电芯粘结固定于所述液冷箱体的顶部。This application also provides a battery pack, including a battery core and the battery thermal management system as described above. The battery core is bonded and fixed to the top of the liquid cooling box.
本申请还提供一种车辆，包括冷却循环系统以及如上所述的电池包，所述冷却循环系统与所述电池包中的所述导热管接通，所述冷却循环系统设置为向所述导热管通入所述导热流体。The present application also provides a vehicle, including a cooling circulation system and a battery pack as described above. The cooling circulation system is connected to the heat conduction pipe in the battery pack, and the cooling circulation system is configured to conduct heat to the battery pack. The tube leads to the heat transfer fluid.
本申请还提供一种电池包的设计方法，用于设计如上述所述的电池包，所 述设计方法包括以下步骤：This application also provides a battery pack design method for designing the battery pack as described above, so The design method described above includes the following steps:
在所述电芯膨胀到最大状态的情况下，获取所述电芯的底部尺寸CMR以及所述电芯的安装极限尺寸GCR，并根据所述底部尺寸CMR和所述安装极限尺寸GCR确定所述电池热管理系统的极限尺寸S1，所述电池热管理系统的所述极限尺寸S1＝CMR*CC*GCR*cosA*cosA*cosA，其中，CC为电芯的体系相关结构系数，CC的取值范围为0.45至0.82，A为尺寸公差补充参数，12°＞A＞0°；When the battery core expands to the maximum state, obtain the bottom size CMR of the battery core and the installation limit size GCR of the battery core, and determine the battery core based on the bottom size CMR and the installation limit size GCR. The limit size S 1 of the battery thermal management system, the limit size S 1 of the battery thermal management system = CMR*CC*GCR*cosA*cosA*cosA, where CC is the system-related structural coefficient of the battery core, and CC The value range is 0.45 to 0.82, A is the supplementary parameter of dimensional tolerance, 12°>A>0°;
根据所述极限尺寸S1确定所述电池热管理系统的相变尺寸，所述电池热管理系统的相变尺寸包括材料相变厚度D和整体相变厚度H，所述材料相变厚度D＝S1÷(GB*GB*E*E*0.85)，GB为设计高度极限尺寸，E为安全尺寸系数，E的取值范围为1.53至1.93，所述整体相变厚度H＝S1÷0.55÷tanB，B为重量补充，45°＞B＞42°；The phase change size of the battery thermal management system is determined according to the limit size S1 . The phase change size of the battery thermal management system includes the material phase change thickness D and the overall phase change thickness H. The material phase change thickness D= S 1 ÷ (GB*GB*E*E*0.85), GB is the design height limit size, E is the safety size factor, the value range of E is 1.53 to 1.93, the overall phase change thickness H=S 1 ÷0.55 ÷tanB, B is the weight supplement, 45°>B>42°;
通过所述整体相变厚度H确定所述保温管的尺寸以及所述导热管的尺寸；The size of the insulation tube and the size of the heat transfer tube are determined by the overall phase change thickness H;
所述底部尺寸CMR、所述安装极限尺寸GCR、所述极限尺寸S1、所述材料相变厚度D以及所述整体相变厚度H根据仿真结果校正反馈。The bottom dimension CMR, the installation limit dimension GCR, the limit dimension S 1 , the material phase change thickness D and the overall phase change thickness H are corrected and fed back according to the simulation results.
附图说明Description of drawings
下面根据附图和实施例对本申请作说明；The present application will be described below based on the drawings and embodiments;
图1为实施例所述的电池包的结构示意图；Figure 1 is a schematic structural diagram of the battery pack according to the embodiment;
图2为实施例所述的电池包的结构爆炸图；Figure 2 is an exploded view of the structure of the battery pack according to the embodiment;
图3为实施例所述的电池包的结构剖视图；Figure 3 is a structural cross-sectional view of the battery pack according to the embodiment;
图4为实施例所述的电池包的设计方法的流程图。FIG. 4 is a flow chart of the battery pack design method according to the embodiment.
图中：In the picture:
1、电池热管理系统；2、电芯；1. Battery thermal management system; 2. Battery core;
11、液冷箱体；12、相变流体；13、导热管；131、第一折弯段；14、导热流体；15、保温管；151、第二折弯段；16、保温流体。11. Liquid cooling box; 12. Phase change fluid; 13. Heat transfer pipe; 131. First bending section; 14. Heat transfer fluid; 15. Insulation tube; 151. Second bending section; 16. Insulation fluid.
具体实施方式Detailed ways
下面将结合附图对本申请实施例的技术方案作说明。The technical solutions of the embodiments of the present application will be described below with reference to the accompanying drawings.
在本申请的描述中，除非另有明确的规定和限定，术语“相连”、“连接”、“固定”应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或成一体；可以是机械连接，也可以是电连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通或两个元件的相互作用关系。对于 本领域的普通技术人员而言，可以视具体情况理解上述术语在本申请中的具体含义。In the description of this application, unless otherwise explicitly stipulated and limited, the terms "connected", "connected" and "fixed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral body. ; It can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be an internal connection between two elements or an interaction between two elements. for Those of ordinary skill in the art can understand the specific meanings of the above terms in this application depending on the specific circumstances.
在本申请中，除非另有明确的规定和限定，第一特征在第二特征之“上”或之“下”可以包括第一特征和第二特征直接接触，也可以包括第一和第二特征不是直接接触而是通过它们之间的另外的特征接触。而且，第一特征在第二特征“之上”、“上方”和“上面”包括第一特征在第二特征正上方和斜上方，或仅仅表示第一特征水平高度高于第二特征。第一特征在第二特征“之下”、“下方”和“下面”包括第一特征在第二特征正下方和斜下方，或仅仅表示第一特征水平高度小于第二特征。In this application, unless otherwise explicitly stated and limited, the term "above" or "below" a first feature on a second feature may include the first feature being in direct contact with the second feature, or it may include the first and second features being in direct contact with each other. Features are not in direct contact but through other features between them. Furthermore, the terms "above", "above" and "above" a first feature on a second feature include the first feature being directly above and diagonally above the second feature, or simply mean that the first feature is higher in level than the second feature. “Below”, “under” and “under” the first feature is the second feature includes the first feature being directly below and diagonally below the second feature, or simply means that the first feature is less horizontally than the second feature.
于本文的描述中，需要理解的是，术语“上”、“下”、“左”、“右”、等方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述和简化操作，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本申请的限制。此外，术语“第一”、“第二”，仅仅用于在描述上加以区分，并没有特殊的含义。In the description of this article, it should be understood that the terms "upper", "lower", "left", "right", etc. are based on the orientation or positional relationship shown in the drawings, and are only for convenience of description. and simplify operation, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation on the present application. In addition, the terms "first" and "second" are only used to differentiate in description and have no special meaning.
在本说明书的描述中，参考术语“一实施例”、“示例”等的描述意指结合该实施例或示例描述的具体特征、结构、材料或者特点包含于本申请的至少一个实施例或示例中。在本说明书中，对上述术语的示意性表述不一定指的是相同的实施例或示例。In the description of this specification, reference to the description of the terms "an embodiment," "example," etc., means that a specific feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. middle. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example.
下面结合附图并通过具体实施方式来说明本申请的技术方案。The technical solutions of the present application will be described below with reference to the accompanying drawings and through specific implementations.
实施例一：Example 1:
如图1至图3所示，本实施例提供一种电池热管理系统1，设置为支撑电芯2，电池热管理系统1包括液冷箱体11、导热管13以及保温管15，液冷箱体11内储存有相变流体12；导热管13穿设于液冷箱体11，导热管13内流通有导热流体14；保温管15穿设于液冷箱体11且与导热管13间隔设置，保温管15内储存有保温流体16。As shown in Figures 1 to 3, this embodiment provides a battery thermal management system 1, which is configured to support the battery core 2. The battery thermal management system 1 includes a liquid cooling box 11, a heat conduction pipe 13 and an insulation pipe 15. The liquid cooling The phase change fluid 12 is stored in the box 11; the heat transfer pipe 13 is passed through the liquid cooling box 11, and the heat transfer fluid 14 circulates in the heat transfer pipe 13; the insulation pipe 15 is passed through the liquid cooling box 11 and is spaced apart from the heat transfer pipe 13 It is set that the insulation fluid 16 is stored in the insulation tube 15 .
本实施例在液冷箱体11内储存相变流体12，当一个电芯2高负荷运行或者异常运行导致产生过多热量时，即该电芯2产生的热量高于预期，过多的热量能够通过液冷箱体11转移到另外的低负荷运行或者异常运行的电芯2，即该另外的电芯2产生的热量低于预期，通过对热量进行转移调节，能够提高电芯2与电芯2之间的温度一致性，而相变流体12能够提高热量的转移效率，提高均匀热传导的效果，且相变流体12能够将热量传递至导热管13和保温管15，使得导热管13内的导热流体14升温并通过导热流体14将热量转移到外界，保温管15内的保温流体16升温，保温流体16能够实现保温作用；当电芯2停止运 行之后，保温流体16能够将热量通过保温管15传递至相变流体12和液冷箱体11，通过液冷箱体11将热量传递给电芯2，使得设置于液冷箱体11上的电芯2能够保证温度一致性，能够在低温环境中同步启动，例如在冬天时，由于保温流体16能够保存热量，使得设置于液冷箱体11上的电芯2能够保证温度一致性。In this embodiment, the phase change fluid 12 is stored in the liquid-cooling box 11. When a battery core 2 generates excessive heat due to high-load operation or abnormal operation, that is, the heat generated by the battery core 2 is higher than expected, and excessive heat The liquid-cooled box 11 can be transferred to another battery core 2 that is running at low load or is operating abnormally, that is, the heat generated by the other battery core 2 is lower than expected. By adjusting the heat transfer, the relationship between the battery core 2 and the battery can be improved. The temperature consistency between the cores 2, and the phase change fluid 12 can improve the heat transfer efficiency and improve the effect of uniform heat conduction, and the phase change fluid 12 can transfer heat to the heat transfer tube 13 and the insulation tube 15, so that the inside of the heat transfer tube 13 The heat transfer fluid 14 heats up and transfers heat to the outside through the heat transfer fluid 14. The heat preservation fluid 16 in the heat preservation tube 15 heats up, and the heat preservation fluid 16 can achieve the heat preservation effect; when the battery core 2 stops operating After that, the insulation fluid 16 can transfer heat to the phase change fluid 12 and the liquid cooling box 11 through the insulation tube 15, and transfer the heat to the battery core 2 through the liquid cooling box 11, so that the heat is disposed on the liquid cooling box 11. The battery core 2 can ensure temperature consistency and can be started synchronously in a low-temperature environment. For example, in winter, since the insulation fluid 16 can preserve heat, the battery core 2 installed on the liquid cooling box 11 can ensure temperature consistency.
可选的，导热管13设置于保温管15的下方，即保温管15设置在导热管13的上方，保温管15靠近于电芯2，在低温环境中，更有利于将热量传递至电芯2，使得设置于液冷箱体11上的电芯2能够保证温度一致性。Optionally, the heat-conducting tube 13 is arranged below the heat-insulating tube 15, that is, the heat-insulating tube 15 is arranged above the heat-conducting tube 13. The heat-insulating tube 15 is close to the battery core 2, which is more conducive to transferring heat to the battery core in a low-temperature environment. 2, so that the battery core 2 arranged on the liquid cooling box 11 can ensure temperature consistency.
可选的，液冷箱体11的内部开设有储存腔，相变流体12储存于储存腔中，导热管13穿过储存腔的一段以及保温管15穿过储存腔的一段均浸泡于相变流体12中。相变流体12与导热管13和保温管15直接接触，能够提高热量的转移效率。Optionally, a storage cavity is provided inside the liquid cooling box 11, and the phase change fluid 12 is stored in the storage cavity. A section of the heat transfer tube 13 passing through the storage cavity and a section of the heat preservation pipe 15 passing through the storage cavity are soaked in the phase change fluid. in fluid 12. The phase change fluid 12 is in direct contact with the heat transfer pipe 13 and the insulation pipe 15, which can improve the heat transfer efficiency.
可选的，导热管13包括延伸至液冷箱体11外部的第一折弯段131，保温管15包括延伸至液冷箱体11外部的第二折弯段151，便于在第一折弯段131和第二折弯段151设置温度检测元件，例如温度传感器，以检测导热管13和保温管15的温度。Optionally, the heat transfer pipe 13 includes a first bending section 131 extending to the outside of the liquid cooling box 11 , and the insulation tube 15 includes a second bending section 151 extending to the outside of the liquid cooling box 11 to facilitate the first bending. The section 131 and the second bent section 151 are provided with temperature detection elements, such as temperature sensors, to detect the temperatures of the heat conduction tube 13 and the insulation tube 15 .
可选的，导热管13和保温管15均设置为蛇形阵列式结构，能够增加导热管13和保温管15与相变流体12的接触面积，且能够提高热量传递的均匀性。Optionally, both the heat transfer tube 13 and the insulation tube 15 are arranged in a serpentine array structure, which can increase the contact area between the heat transfer tube 13 and the insulation tube 15 and the phase change fluid 12 and improve the uniformity of heat transfer.
可选的，导热管13和保温管15均采用导热金属材料制成，例如铝合金，或者铁合金，或者钛合金。本实施例的导热管13和保温管15采用铝合金制成。Optionally, both the heat-conducting tube 13 and the thermal insulation tube 15 are made of heat-conducting metal materials, such as aluminum alloy, iron alloy, or titanium alloy. The heat conduction tube 13 and the insulation tube 15 of this embodiment are made of aluminum alloy.
实施例二：Example 2:
本实施例提供一种电池包，该电池包包括电芯2以及如实施例一的电池热管理系统1，电芯2粘结固定于液冷箱体11的顶部。This embodiment provides a battery pack. The battery pack includes a battery core 2 and a battery thermal management system 1 as in Embodiment 1. The battery core 2 is bonded and fixed to the top of the liquid cooling box 11 .
本实施例采用胶水将电芯2粘结于液冷箱体11的顶部，减少电偶腐蚀带来的影响，实现集成化设计；且液冷箱体11的顶部间隔设置有多个电芯2，对电芯2进行热量调节，例如将一个电芯2产生的热量转移或者将热量传递到另一个电芯2，能够提高电芯2与电芯2之间的温度一致性。In this embodiment, glue is used to bond the battery cores 2 to the top of the liquid-cooling box 11 to reduce the impact of galvanic corrosion and achieve an integrated design; and multiple battery cores 2 are spaced on the top of the liquid-cooling box 11 , adjusting the heat of the battery core 2, such as transferring the heat generated by one battery core 2 or transferring the heat to another battery core 2, can improve the temperature consistency between the battery core 2 and the battery core 2.
实施例三：Embodiment three:
本实施例提供一种车辆，该车辆包括冷却循环系统以及如实施例二的电池包，冷却循环系统与电池包中的导热管13接通，冷却循环系统设置为向导热管13通入导热流体14。冷却循环系统能够向导热管13提供新的低温的导热流体14，使得导热管13保持低温，且导热管13内经过升温后的导热流体14能够循环回流至冷却循环系统内，进行循环使用。本实施例的冷却循环系统可参考相 关技术中的冷却设备，例如空调。本实施例的冷却循环系统未在附图中展示。This embodiment provides a vehicle, which includes a cooling circulation system and a battery pack as in Embodiment 2. The cooling circulation system is connected to the heat transfer pipe 13 in the battery pack, and the cooling circulation system is configured to pass the heat transfer fluid 14 into the heat transfer pipe 13 . The cooling circulation system can provide new low-temperature heat transfer fluid 14 to the heat transfer pipe 13 to keep the heat transfer pipe 13 at a low temperature, and the heated heat transfer fluid 14 in the heat transfer pipe 13 can circulate back to the cooling circulation system for recycling. The cooling circulation system of this embodiment can refer to the phase Cooling equipment in related technologies, such as air conditioners. The cooling circulation system of this embodiment is not shown in the drawings.
可选的，保温管15的端口设置有密封结构，密封结构设置为将保温流体16密封于保温管15内。Optionally, the port of the insulation tube 15 is provided with a sealing structure, and the sealing structure is configured to seal the insulation fluid 16 within the insulation tube 15 .
实施例四：Embodiment 4:
如图4所示，本实施例提供一种电池包的设计方法，用于设计如实施例二的电池包，设计方法包括以下步骤：As shown in Figure 4, this embodiment provides a battery pack design method for designing the battery pack as in Embodiment 2. The design method includes the following steps:
S100、在电芯2膨胀到最大状态的情况下，获取电芯2的底部尺寸CMR以及电芯2的安装极限尺寸GCR，并根据底部尺寸CMR和安装极限尺寸GCR确定电池热管理系统1的极限尺寸S1，电池热管理系统1的极限尺寸S1＝CMR*CC*GCR*cosA*cosA*cosA，其中，CC为电芯2的体系相关结构系数，CC的取值范围为0.45至0.82，A为尺寸公差补充参数，12°＞A＞0°。S100. When the battery cell 2 expands to its maximum state, obtain the bottom size CMR of the battery cell 2 and the installation limit size GCR of the battery cell 2, and determine the limit of the battery thermal management system 1 based on the bottom size CMR and the installation limit size GCR. Size S1, the limit size S1 of the battery thermal management system 1 = CMR*CC*GCR*cosA*cosA*cosA, where CC is the system-related structural coefficient of the battery cell 2, the value range of CC is 0.45 to 0.82, and A is Supplementary parameters for dimensional tolerance, 12°>A>0°.
在步骤S100中，电芯2进行充电放电循环，若电芯2为电动汽车(Electric Vehicle，EV)电芯，则充电放电循环次数为2000次，以使得电芯2膨胀到最大状态，若电芯2为油电混合动力汽车(Hybrid Electric Vehicle，HEV)电芯或者插电式混合动力汽车(Plug-in Hybrid Electric Vehicle，PHEV)电芯，则充电放电循环次数为3000次，以使得电芯2膨胀到最大状态；cosA是指A的余弦值。可选的，CC为0.45，0.46，0.50，0.55，0.60，0.65，0.70，0.75，0.80，0.82，可选的，A为1°，1.5°，2°，2.5°，3°，4°，5°，6°，7°，8°，9°，10°，11°。In step S100, the battery core 2 performs a charge and discharge cycle. If the battery core 2 is an electric vehicle (EV) battery, the number of charge and discharge cycles is 2000 times, so that the battery core 2 expands to the maximum state. If the battery core 2 Cell 2 is a hybrid electric vehicle (HEV) battery cell or a plug-in hybrid electric vehicle (PHEV) battery cell. The number of charge and discharge cycles is 3000 times, so that the battery cell 2 expands to its maximum state; cosA refers to the cosine of A. Optional, CC is 0.45, 0.46, 0.50, 0.55, 0.60, 0.65, 0.70, 0.75, 0.80, 0.82, optional, A is 1°, 1.5°, 2°, 2.5°, 3°, 4°, 5°, 6°, 7°, 8°, 9°, 10°, 11°.
S200、根据极限尺寸S1确定电池热管理系统1的相变尺寸，电池热管理系统1的相变尺寸包括材料相变厚度D和整体相变厚度H，材料相变厚度D＝S1÷(GB*GB*E*E*0.85)，GB为设计高度极限尺寸，E为安全尺寸系数，E的取值范围为1.53至1.93，整体相变厚度H＝S1÷0.55÷tanB，B为重量补充，45°＞B＞42°。S200. Determine the phase change size of the battery thermal management system 1 according to the limit size S1. The phase change size of the battery thermal management system 1 includes the material phase change thickness D and the overall phase change thickness H. The material phase change thickness D=S1÷(GB* GB*E*E*0.85), GB is the design height limit size, E is the safety size factor, the value range of E is 1.53 to 1.93, the overall phase change thickness H=S1÷0.55÷tanB, B is the weight supplement, 45 °＞B＞42°.
在步骤S200中，可选的，E为1.53，1.55，1.60，1.65，1.70，1.75，1.80，1.93；可选的，B为42.1°，42.3°，42.5°，43°，43.5°，44°，44.5°，44.9°。In step S200, optionally, E is 1.53, 1.55, 1.60, 1.65, 1.70, 1.75, 1.80, 1.93; optionally, B is 42.1°, 42.3°, 42.5°, 43°, 43.5°, 44° , 44.5°, 44.9°.
S300、通过整体相变厚度H确定保温管15的尺寸以及导热管13的尺寸。S300. Determine the size of the thermal insulation tube 15 and the size of the heat transfer tube 13 based on the overall phase change thickness H.
在步骤S300中，整体相变厚度H大于保温管15的直径与导热管13的直径之和的三倍。In step S300 , the overall phase change thickness H is greater than three times the sum of the diameters of the insulation tube 15 and the heat transfer tube 13 .
S400、底部尺寸CMR、安装极限尺寸GCR、极限尺寸S1、材料相变厚度D以及整体相变厚度H根据仿真结果校正反馈。S400, bottom dimension CMR, installation limit dimension GCR, limit dimension S1, material phase change thickness D and overall phase change thickness H are corrected and fed back based on the simulation results.
在步骤S400中，底部尺寸CMR、安装极限尺寸GCR、极限尺寸S1、材料 相变厚度D以及整体相变厚度H根据计算机辅助工程(Computer Aided Engineering，CAE)软件或者计算机流力学(Computational Fluid Dynamics，CFD)软件的仿真结果校正反馈。In step S400, the bottom size CMR, installation limit size GCR, limit size S1, material The phase change thickness D and the overall phase change thickness H are corrected and fed back based on the simulation results of computer-aided engineering (Computer Aided Engineering, CAE) software or computer fluid dynamics (Computational Fluid Dynamics, CFD) software.
通过本实施例的设计方法制得的电池包的集成化程度更高。The battery pack produced by the design method of this embodiment has a higher degree of integration.
本申请提供一种电池热管理系统、电池包、车辆及电池包的设计方法，以提高对电芯的热管理效率。本申请的车辆包括电池包，电池包包括电池热管理系统和电芯，电芯设置于电池热管理系统上，电池热管理系统包括液冷箱体、导热管以及保温管，在液冷箱体内储存相变流体，当一个电芯高负荷运行或者异常运行导致产生过多热量时，过多的热量能够通过液冷箱体转移到另外的低负荷运行或者异常运行的电芯，能够提高电芯与电芯之间的温度一致性，而相变流体能够提高热量的转移效率，提高均匀热传导的效果，且相变流体能够将热量传递至导热管和保温管，使得导热管内的导热流体升温并通过导热流体将热量转移到外界，保温管内的保温流体升温，保温流体能够实现保温作用；当电芯停止运行之后，保温流体能够将热量通过保温管传递至相变流体和液冷箱体，通过液冷箱体将热量传递给电芯，使得设置于液冷箱体上的电芯能够保证温度一致性，能够在低温环境中同步启动。 This application provides a design method for a battery thermal management system, a battery pack, a vehicle, and a battery pack to improve the thermal management efficiency of battery cells. The vehicle of this application includes a battery pack. The battery pack includes a battery thermal management system and a battery core. The battery core is installed on the battery thermal management system. The battery thermal management system includes a liquid cooling box, a heat conduction tube and an insulation tube. The battery heat management system is located in the liquid cooling box. Store phase change fluid. When a battery cell generates too much heat due to high load operation or abnormal operation, the excess heat can be transferred to another low load or abnormal operation battery cell through the liquid cooling box, which can improve the battery cell quality. The phase change fluid can improve the heat transfer efficiency and the effect of uniform heat conduction, and the phase change fluid can transfer heat to the heat transfer tube and the insulation tube, causing the heat transfer fluid in the heat transfer tube to heat up and The heat is transferred to the outside through the heat transfer fluid, and the insulation fluid in the insulation tube heats up. The insulation fluid can achieve the insulation effect; when the battery core stops running, the insulation fluid can transfer the heat to the phase change fluid and the liquid cooling box through the insulation tube. The liquid-cooled box transfers heat to the battery core, so that the battery core installed on the liquid-cooled box can ensure temperature consistency and can be started synchronously in a low-temperature environment.

Claims (10)

  1. 电池热管理系统，设置为支撑电芯(2)，所述电池热管理系统(1)包括：The battery thermal management system is configured to support the battery core (2). The battery thermal management system (1) includes:
    液冷箱体(11)，所述液冷箱体(11)内储存有相变流体(12)；Liquid cooling box (11), the phase change fluid (12) is stored in the liquid cooling box (11);
    导热管(13)，穿设于所述液冷箱体(11)，所述导热管(13)内流通有导热流体(14)；A heat transfer pipe (13) is installed in the liquid cooling box (11), and a heat transfer fluid (14) flows in the heat transfer pipe (13);
    保温管(15)，穿设于所述液冷箱体(11)且与所述导热管(13)间隔设置，所述保温管(15)内储存有保温流体(16)。The thermal insulation tube (15) penetrates the liquid cooling box (11) and is spaced apart from the heat transfer tube (13). The thermal insulation tube (15) stores thermal insulation fluid (16).
  2. 根据权利要求1所述的电池热管理系统，其中，所述导热管(13)设置于所述保温管(15)的下方。The battery thermal management system according to claim 1, wherein the heat conduction pipe (13) is disposed below the thermal insulation pipe (15).
  3. 根据权利要求1所述的电池热管理系统，其中，所述液冷箱体(11)的内部开设有储存腔，所述相变流体(12)储存于所述储存腔中，所述导热管(13)穿过所述储存腔的一段以及所述保温管(15)穿过所述储存腔的一段均浸泡于所述相变流体(12)中。The battery thermal management system according to claim 1, wherein a storage cavity is provided inside the liquid cooling box (11), the phase change fluid (12) is stored in the storage cavity, and the heat conduction tube (13) A section that passes through the storage cavity and a section of the insulation tube (15) that passes through the storage cavity are both immersed in the phase change fluid (12).
  4. 根据权利要求1所述的电池热管理系统，其中，所述导热管(13)包括延伸至所述液冷箱体(11)外部的第一折弯段(131)，所述保温管(15)包括延伸至所述液冷箱体(11)外部的第二折弯段(151)。The battery thermal management system according to claim 1, wherein the heat pipe (13) includes a first bent section (131) extending to the outside of the liquid cooling box (11), and the insulation pipe (15 ) includes a second bent section (151) extending to the outside of the liquid cooling box (11).
  5. 根据权利要求4所述的电池热管理系统，其中，所述导热管(13)和所述保温管(15)均设置为蛇形阵列式结构。The battery thermal management system according to claim 4, wherein the heat conduction tube (13) and the insulation tube (15) are both arranged in a serpentine array structure.
  6. 根据权利要求1-5任一项所述的电池热管理系统，其中，所述导热管(13)和所述保温管(15)均采用导热金属材料制成。The battery thermal management system according to any one of claims 1 to 5, wherein both the heat conduction pipe (13) and the insulation pipe (15) are made of heat conductive metal materials.
  7. 电池包，包括电芯(2)以及如权利要求1-6任一项所述的电池热管理系统(1)，所述电芯(2)粘结固定于所述液冷箱体(11)的顶部。A battery pack, including an electric core (2) and a battery thermal management system (1) according to any one of claims 1 to 6, the electric core (2) being bonded and fixed to the liquid cooling box (11) the top of.
  8. 车辆，包括冷却循环系统以及如权利要求7所述的电池包，所述冷却循环系统与所述电池包中的所述导热管(13)接通，所述冷却循环系统设置为向所述导热管(13)通入所述导热流体(14)。A vehicle, comprising a cooling circulation system and a battery pack as claimed in claim 7, the cooling circulation system being connected to the heat conduction pipe (13) in the battery pack, the cooling circulation system being configured to conduct heat to the The tube (13) leads to the heat transfer fluid (14).
  9. 根据权利要求8所述的车辆，其中，所述保温管(15)的端口设置有密封结构，所述密封结构设置为将所述保温流体(16)密封于所述保温管(15)内。The vehicle according to claim 8, wherein the port of the insulation tube (15) is provided with a sealing structure, and the sealing structure is configured to seal the insulation fluid (16) within the insulation tube (15).
  10. 电池包的设计方法，用于设计如权利要求7所述的电池包，所述设计方法包括以下步骤：The design method of the battery pack is used to design the battery pack as claimed in claim 7, and the design method includes the following steps:
    在所述电芯(2)膨胀到最大状态的情况下，获取所述电芯(2)的底部尺寸CMR以及所述电芯(2)的安装极限尺寸GCR，并根据所述底部尺寸CMR 和所述安装极限尺寸GCR确定所述电池热管理系统(1)的极限尺寸S1，所述电池热管理系统(1)的所述极限尺寸S1＝CMR*CC*GCR*cosA*cosA*cosA，其中，CC为电芯(2)的体系相关结构系数，CC的取值范围为0.45至0.82，A为尺寸公差补充参数，12°＞A＞0°；When the battery core (2) expands to the maximum state, obtain the bottom dimension CMR of the battery core (2) and the installation limit size GCR of the battery core (2), and calculate the and the installation limit size GCR determine the limit size S1 of the battery thermal management system (1), the limit size S1 of the battery thermal management system (1)=CMR*CC*GCR*cosA*cosA*cosA, Among them, CC is the system-related structural coefficient of the battery core (2), the value range of CC is 0.45 to 0.82, A is the supplementary parameter of dimensional tolerance, 12°>A>0°;
    根据所述极限尺寸S1确定所述电池热管理系统(1)的相变尺寸，所述电池热管理系统(1)的相变尺寸包括材料相变厚度D和整体相变厚度H，所述材料相变厚度D＝S1÷(GB*GB*E*E*0.85)，GB为设计高度极限尺寸，E为安全尺寸系数，E的取值范围为1.53至1.93，所述整体相变厚度H＝S1÷0.55÷tanB，B为重量补充，45°＞B＞42°；The phase change size of the battery thermal management system (1) is determined according to the limit size S1. The phase change size of the battery thermal management system (1) includes the material phase change thickness D and the overall phase change thickness H. The material Phase change thickness D=S1÷(GB*GB*E*E*0.85), GB is the design height limit size, E is the safety size factor, the value range of E is 1.53 to 1.93, the overall phase change thickness H= S1÷0.55÷tanB, B is the weight supplement, 45°>B>42°;
    通过所述整体相变厚度H确定所述保温管(15)的尺寸以及所述导热管(13)的尺寸；The size of the insulation tube (15) and the size of the heat transfer tube (13) are determined by the overall phase change thickness H;
    所述底部尺寸CMR、所述安装极限尺寸GCR、所述极限尺寸S1、所述材料相变厚度D以及所述整体相变厚度H根据仿真结果校正反馈。 The bottom dimension CMR, the installation limit dimension GCR, the limit dimension S1, the material phase change thickness D and the overall phase change thickness H are corrected and fed back according to the simulation results.
PCT/CN2023/099370 2022-08-17 2023-06-09 Battery thermal management system, battery pack, vehicle, and battery pack design method WO2024037147A1 (en)

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