GB2622656A - Control method of module to vehicle (MTV)-based battery dual-thermal management system - Google Patents

Control method of module to vehicle (MTV)-based battery dual-thermal management system Download PDF

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Publication number
GB2622656A
GB2622656A GB2304378.9A GB202304378A GB2622656A GB 2622656 A GB2622656 A GB 2622656A GB 202304378 A GB202304378 A GB 202304378A GB 2622656 A GB2622656 A GB 2622656A
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United Kingdom
Prior art keywords
battery
temperature
air
humidity
cooling system
Prior art date
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Pending
Application number
GB2304378.9A
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GB202304378D0 (en
Inventor
Su Liang
Luo Bin
Yong Weifan
Hong Shaoyang
Sun Weijia
Lu Jianping
Ren Yonghuan
Xu Yining
Song Guangji
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Xiamen King Long United Automotive Industry Co Ltd
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Xiamen King Long United Automotive Industry Co Ltd
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Publication of GB202304378D0 publication Critical patent/GB202304378D0/en
Publication of GB2622656A publication Critical patent/GB2622656A/en
Pending legal-status Critical Current

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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
    • B60L1/00—Supplying electric power to auxiliary equipment of vehicles
    • B60L1/02—Supplying electric power to auxiliary equipment of vehicles to electric heating circuits
    • 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
    • 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
    • H01M10/63—Control systems
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
    • H01M10/6561—Gases
    • H01M10/6562—Gases with free flow by convection only
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
    • H01M10/6561—Gases
    • H01M10/6563—Gases with forced flow, e.g. by blowers
    • 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
    • H01M10/66—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
    • 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
    • B60L2240/00—Control parameters of input or output; Target parameters
    • B60L2240/10—Vehicle control parameters
    • B60L2240/34—Cabin temperature
    • 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)
  • Power Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Transportation (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Automation & Control Theory (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)
  • Secondary Cells (AREA)
  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)

Abstract

A control method of a dual-thermal management system comprising an air conditioning compartment, a battery compartment and an air duct on a roof of a bus, the air duct communicated with a passenger compartment and the battery compartment, the air conditioning compartment provided with an air conditioning component with a refrigerant circuit, the battery compartment provided with a plurality of battery modules and a water cooling circuit with a water cooling plate group that exchanges heat with the refrigerant circuit, forming a water cooling system, the battery compartment provided with an air inlet communicated with the air duct and an air outlet communicated with an outside of the bus, forming an air cooling system with the air conditioning component and the air duct, the method comprising operating the water cooling system in a cooling mode if a battery temperature is higher than temperature T1 and in a heating mode if the battery temperature is lower than temperature T2, and operating the air cooling system in a cooling mode if an ambient temperature in the battery compartment is higher than temperature T3 and in a heating mode if the ambient temperature in the battery compartment is lower than temperature T4.

Description

CONTROL METHOD OF MODULE TO VEHICLE (MTV)-BASED BATTERY DUAL-
THERMAL MANAGEMENT SYSTEM
TECHNICAL FIELD
[0001] The present disclosure relates to the technical field of electric buses, and in particular, to a control method of a module to vehicle (MTV)-based battery dual-thermal management system.
BACKGROUND
[0002] According to different layout positions, power batteries of electric buses can be roughly divided into overhead batteries, rear batteries and bottom batteries. The overhead battery refers to the battery arranged on the roof of the bus. In the prior art, the assembled battery pack is usually directly assembled to the roof of the bus as an independent part through the mounting bracket. This layout mode has problems such as low integration degree and large occupying space and cannot make full use of the space of the roof, and the number of battery packs carried is limited.
[0003] The module to vehicle (MTV) technology refers to arranging a battery compartment on the roof of the bus, and directly arranging the battery module in the battery compartment using the roof as the box of the battery pack, so as to overcome the defects of the prior art and realize high integration of the battery pack and the roof The existing power batteries are mainly air-cooled by adding additional facilities such as electromagnetic fans to speed up the air flow in the battery pack area, so as to cool the battery. However, after the integration of MTV technology, the space in the battery compartment of the roof is limited, which cannot meet the layout requirements of the electromagnetic fan and other facilities. Moreover, this air cooling technology has poor integration and low cooling efficiency, so there is large room for improvement.
100041 Based on this, a control method of an MTV-based battery dual-thermal management system is provided.
SUMMARY
[0005] The present disclosure provides a control method of an MTV-based battery dual-thermal management system, which mainly aims to solve problems in the prior art.
[0006] The present disclosure adopts the following technical solutions: [0007] The present disclosure provides a control method of an MTV-based battery dual-thermal management system. The MTV-based battery dual-thermal management system includes an air conditioning compartment and a battery compartment independently arranged on a roof of a bus, and an air duct arranged on the roof of the bus, and the air duct is communicated with a passenger compartment and the battery compartment. The air conditioning compartment is provided with an air conditioning component with a refrigerant circuit. The battery compartment is provided with a plurality of battery modules arranged at intervals and is provided with a water cooling circuit with a water cooling plate group, and the water cooling circuit exchanges heat with the refrigerant circuit through a heat exchange plate, so as to form a battery water cooling system. The battery compartment is provided with an air inlet communicated with the air duct and an air outlet communicated with an outside of the bus, so as to form a battery air cooling system with the air conditioning component and the air duct. The control method includes the following steps: 100081 (1) obtaining a battery temperature TO and an ambient temperature T in the battery compartment; 100091 (2) determining whether to enable a cooling mode of the battery water cooling system and the battery air cooling system by determining whether the battery temperature TO is greater than a preset temperature Ti and whether the ambient temperature T is greater than a preset temperature T3: 100101 (2.1) determining whether the battery temperature TO is greater than the preset temperature TI, and if yes, enabling the cooling mode of the battery water cooling system, so as to cool the battery modules; and determining whether the ambient temperature T is greater than the preset temperature T3 and whether a refrigeration mode of the air conditioning component has been enabled, and if yes, enabling the cooling mode of the battery air cooling system, so as to cool an environment in the battery compartment; and [0011] (2.2) if the ambient temperature T is not greater than the preset temperature T3, disabling the cooling mode of the battery air cooling system; and if the battery temperature TO is not greater than the preset temperature TI, disabling the cooling mode of the battery water cooling system; and [0012] (3) determining whether to enable a heating mode of the battery water cooling system and the battery air cooling system by determining whether the battery temperature TO is less than a preset temperature T2 and whether the ambient temperature T is less than a preset temperature T4: 100131 (3.1) determining whether the battery temperature TO is less than the preset temperature T2, and if yes, enabling the heating mode of the battery water cooling system, so as to heat the battery modules; and determining whether the ambient temperature T is less than the preset temperature T4 and whether a heating mode of the air conditioning component has been enabled, and if yes, enabling the heating mode of the battery air cooling system, so as to heat the environment in the battery compartment, and 100141 (3.2) if the ambient temperature T is not less than the preset temperature T4, disabling the heating mode of the battery air cooling system; and if the battery temperature TO is not less than the preset temperature T2, disabling the heating mode of the battery water cooling system. [0015] Further, the air inlet is provided with a first one-way valve, the air outlet is provided with a second one-way valve, and an exhaust fan is arranged outside the air outlet. The air conditioning component, the air duct, the first one-way valve, the second one-way valve and the exhaust fan form the battery air cooling system.
100161 Furthermore, the battery dual-thermal management system further includes a dryer arranged outside the air inlet. The air duct, the dryer, the first one-way valve, the second one-way valve and the exhaust fan form a battery compartment ventilation system. In steps (2) and (3), when the battery air cooling system is not turned on, if ambient humidity Y in the battery compartment is greater than set humidity Yl, the battery compartment ventilation system is turned on to exchange air for the battery compartment separately.
[0017] Furthermore, in steps (2.2) and (3.2), the ambient humidity Y is monitored in real time, and if the ambient humidity Y is not greater than the set humidity Yl, whether to turn off the battery air cooling system is determined.
[0018] Furthermore, the battery dual-thermal management system further includes a first humidity sensor and a second humidity sensor, and the first humidity sensor is arranged at a side of the air inlet in the battery compartment. The second humidity sensor is arranged at a side of the air outlet in the battery compartment. Humidity of the first humidity sensor and the second humidity sensor is obtained at the same time, and a maximum of the humidity of the first humidity sensor and the second humidity sensor is taken as the ambient humidity Y in the battery compartment [0019] Furthermore, in steps (2.2) and (3.2), when the battery air cooling system continuously works for more than a preset time Z I, if humidity of the first humidity sensor YO exceeds preset humidity Y2, a vehicle instrument reminds the dryer of abnormalities, and whether to turn off the battery air cooling system is determined, otherwise, if the ambient humidity Y is not greater than the set humidity Y1, whether to turn off the battery air cooling system is determined.
[0020] Furthermore, when the battery compartment ventilation system continuously works for more than a preset time Z I, if humidity of the first humidity sensor YO exceeds preset humidity Y2, a vehicle instrument reminds the dryer of abnormalities, and the battery compartment ventilation system is turned off, otherwise, if the ambient humidity Y is not greater than the set humidity Yl, the battery compartment ventilation system is turned off.
100211 Further, the battery dual-thermal management system further includes a first temperature sensor and a second temperature sensor, and the first temperature sensor is arranged at a side of the air inlet in the battery compartment. The second temperature sensor is arranged at a side of the air outlet in the battery compartment. Temperatures of the first temperature sensor and the second temperature sensor are obtained at the same time, and an average of the temperatures is taken as the ambient temperature T in the battery compartment.
[0022] Further, the refrigerant circuit includes a condenser and a compressor connected with each other. The water cooling circuit includes the water cooling plate group, a water pump and a positive temperature coefficient (PTC) heater connected with each other. The water cooling circuit and the refrigerant circuit are subjected to parallel heat exchange through the heat exchange plate.
[0023] Furthermore, the water cooling plate group includes a plurality of water cooling plates connected with each other. Each of the battery modules is provided with one of the water cooling plates.
[0024] Compared with the prior art, the present disclosure has the following beneficial effects. [0025] 1. The control method combines the battery air cooling system with the battery water cooling system to realize battery thermal management control. Simultaneous operations of the dual thermal management system can effectively improve thermal management efficiency and ensure that the battery temperature and the ambient temperature and ambient humidity in the battery compartment are controlled in an excellent range. Thus, the battery can work in an excellent environment and a battery life is prolonged.
[0026] 2. When the battery air cooling system of the present disclosure works, the cold air or hot air prepared by the air conditioning component diffuses into the passenger compartment through the air duct, and enters the battery compartment through the air inlet in the air duct, so as to cool or heat the battery compartment, and is finally discharged from the air outlet to the outside of the bus, so as to effectively adjust the ambient temperature of the battery compartment. It can be seen that the battery air cooling system of the present disclosure has the advantages of simple structure and ingenious design, and overcomes the defects in the prior art which requires additional facilities such as electromagnetic fans.
[0027] 3. The battery air cooling system of the present disclosure can effectively adjust the ambient temperature of the battery compartment, reduce the ambient humidity in the battery compartment, and prevent condensation, so as to avoid insulation problems. In addition, when the battery air cooling system does not work, it can also control the battery compartment ventilation system to work independently, so as to adjust the ambient humidity in the battery compartment.
BRIEF DESCRIPTION OF THE DRAWINGS
100281 FIG. 1 is a schematic structural diagram of a roof of a bus in the present disclosure; [0029] FIG. 2 is a block diagram showing an overall structure of the present disclosure; and [0030] FIG. 3 is a schematic flowchart of control of the present disclosure.
[0031] Reference numerals: 1, battery compartment; 10, battery module; 11, first one-way valve; 12, second one-way valve; 13, exhaust fan; 14, dryer; 15, water cooling circuit; 151, water cooling plate; 152, water pump; 153, PTC heater; 154, heat exchange plate; 16, first humidity sensor; 17, second humidity sensor; 18, first temperature sensor; 19, second temperature sensor; 2, air conditioning compartment; 21, refrigerant circuit; 211, condenser; 212, compressor; 22, evaporator; 3, air duct; and 4, vehicle control module.
DETAILED DESCRIPTION OF THE EMBODIMENTS
100321 Specific implementations of the present disclosure will be described below with reference to the accompanying drawings. In order to fully understand the present disclosure, many details are described below, but for those skilled in the art, the present disclosure can be implemented without these details.
100331 With reference to FIG. 1 and FIG. 2, the present disclosure provides a control method of an MTV-based battery dual-thermal management system. The battery dual-thermal management system includes an air conditioning compartment 2 and a battery compartment 1 independently arranged on a roof of a bus, and an air duct 3 arranged on the roof of the bus, and the air duct 3 is communicated with a passenger compartment and the air conditioning compartment 2. The air conditioning compartment 2 is provided with an air conditioning component with a refrigerant circuit 21. The battery compartment 1 is provided with an air inlet communicated with the air duct 3 and an air outlet communicated with an outside of the bus, so as to form a battery air cooling system with the air conditioning component and the air duct 3. When the battery air cooling system works, the cold air or hot air prepared by the air conditioning component diffuses into the passenger compartment through the air duct, and enters the battery compartment 1 through the air inlet, so as to cool or heat the battery compartment 1, and is finally discharged from the air outlet to the outside of the bus.
[0034] With reference to FIG 1 and FIG. 2, the air inlet and the air outlet are provided with a first one-way valve 11 and a second one-way valve 12 respectively, and an exhaust fan 13 is arranged outside the air outlet. When the exhaust fan 13 works, a negative pressure is formed in the battery compartment 1, such that the gas in the air duct 3 can enter the battery compartment 1 from the air inlet and be discharged from the air outlet to the outside of the bus. The arrangement of the first one-way valve 11 can prevent the gas in the battery compartment 1 from being discharged into the air duct 3, and the arrangement of the second one-way valve 12 can prevent the gas outside the bus from being discharged into the battery compartment 1, thus ensuring the one-way flow of the battery air cooling system. It can be seen that the air conditioning component, the air duct 3, the first one-way valve 11, the second one-way valve 12 and the exhaust fan 13 form the more complete and reliable battery air cooling system.
100351 With reference to FIG. 1 and FIG. 2, the battery compartment 1 is provided with a water cooling circuit 15 with a water cooling plate group, and the water cooling circuit 15 exchanges heat with the refrigerant circuit 21 through a heat exchange plate 154, so as to form a battery water cooling system. When the battery water cooling system works, the refrigerant circuit 21 cools or heats the refrigerant media, and exchanges heat with a high or low temperature coolant in the water cooling circuit 15 through the heat exchange plate 154, so as to cool or heat the cool ant.
100361 With reference to FIG. 1 and FIG. 2, specifically, the refrigerant circuit 21 includes a condenser 211 and a compressor 212 connected with each other. The water cooling circuit 15 includes the water cooling plate group, a water pump 152 and a PTC heater 153 connected with each other, and the water cooling circuit 15 and the refrigerant circuit 21 are subjected to parallel heat exchange through the heat exchange plate 154. The water cooling plate group includes a plurality of water cooling plates 151 connected with each other. The battery compartment 1 is provided with a plurality of battery modules 10 arranged at intervals, and each of the battery modules 10 is provided with one of the water cooling plates 151, so as to ensure that the battery water cooling system can evenly cool each water cooling plate 151. In addition, the air conditioning component further includes an evaporator 22 connected in parallel with the refrigerant circuit 21. The working principle of the parts such as the evaporator 22, the condenser 211, and the compressor 212 belongs to the prior art and will not be described here.
100371 With reference to FIG. 1 and FIG. 2, the battery dual-then-nal management system further includes a dryer 14 arranged outside the air inlet. The air duct 3, the dryer 14, the first one-way valve 11, the second one-way valve 12 and the exhaust fan 13 form a battery compartment ventilation system. After the battery compartment 1 is integrated on the roof, condensation is easy to occur in the battery compartment 1, resulting in insulation problems. This is because: on the one hand, the space of the integrated battery compartment 1 is greatly increased, and the gas in the compartment is also more, so when the temperature difference between inside and outside is large, condensation is easy to occur in the battery compartment 1. On the other hand, after integration, the water cooling plates 151 of the battery modules 10 are all arranged in the battery compartment 1, so the temperature difference between the inside and outside of the compartment is increased, which makes condensation easier. Based on this, the dryer 14 is arranged at the air inlet of the air duct to dry the gas in the air duct 3, so as to inject dry gas into the battery compartment 1, and make the moist gas discharged from the air outlet in time. When the battery air cooling system works, the gas heated or cooled by the air conditioning component in the air conditioning compartment 2 enters the air duct 3 and enters the battery compartment 1 after being dried by the dryer 14, thus realizing the air exchange treatment of the battery compartment 1 is realized during thermal management. When the battery air cooling system is turned off, the battery compartment ventilation system operates separately, and the gas in the passenger compartment enters the air duct 3 and enters the battery compartment 1 after being dried by the dryer, thus realizing the air exchange treatment of the battery compartment 1. [0038] With reference to FIG. 1 and FIG. 2, the battery dual-thermal management system further includes a first humidity sensor 16 and a second humidity sensor 17, and the first humidity sensor 16 is arranged at a side of the air inlet in the battery compartment. The second humidity sensor 17 is arranged at a side of the air outlet in the battery compartment. The first humidity sensor 16 and the second humidity sensor 17 in the present embodiment are configured to detect the ambient humidity in the battery compartment at the same time. Humidity of the first humidity sensor 16 and the second humidity sensor 17 is obtained at the same time while determining the ambient humidity in the compartment, and a maximum of the humidity of the first humidity sensor and the second humidity sensor is taken as the ambient humidity Y in the battery compartment, so as to ensure that the air humidity in each area of the battery compartment meets the safety requirements. In addition, the first humidity sensor 16 located at the side of the air inlet can also be configured to detect whether the drying performance of the dryer 14 is normal, so as to prevent the abnormal air exchange effect of the battery compartment 1 caused by the failure of the dryer. Preferably, the dryer 14 in this implementation includes a container and a desiccant contained in the container. When abnormal drying performance is detected, the desiccant can be replaced to quickly deal with the abnormality, thus improving work efficiency.
[0039] With reference to FIG. 1 and FIG. 2, the battery dual-thermal management system further includes a first temperature sensor 18 and a second temperature sensor 19, and the first temperature sensor 18 is arranged at a side of the air inlet in the battery compartment. The second temperature sensor 19 is arranged at a side of the air outlet in the battery compartment. The first temperature sensor 18 and the second temperature sensor 19 in the present embodiment are configured to detect the ambient temperature in the battery compartment at the same time. Temperatures of the first temperature sensor 18 and the second temperature sensor 19 are obtained at the same time while determining the ambient temperature in the compartment, and an average of the temperatures is taken as the ambient temperature Tin the battery compartment, so as to ensure that the obtained ambient temperature in the battery compartment is more accurate and reliable.
[0040] With reference to FIG. 1 and FIG. 2, the battery dual-thermal management system further includes a vehicle control module 4. The vehicle control module 4 controls and is connected with the first humidity sensor 16, the second humidity sensor 17, the first temperature sensor 18 and the second temperature sensor 19, so as to timely obtain the ambient humidity Y and the ambient temperature T in the battery compartment. The vehicle control module 4 controls and is connected with the exhaust fan 13, so as to control the on or off of the battery air cooling system or the battery compartment ventilation system. In addition, the vehicle control module is also connected with a battery management system (BMS) to obtain the temperature of each battery module 10, and an average temperature of the battery modules 10 is taken as the battery temperature TO.
10041] With reference to FIG. 1 to FIG. 3, in order to more clearly introduce the above battery dual-thermal management system, the specific control method of the present embodiment is described in detail, including the following control steps.
[0042] (1) A battery temperature TO and an ambient temperature T in the battery compartment are obtained.
[0043] (2) Whether to enable a cooling mode of the battery water cooling system and the battery air cooling system is determined by determining whether the battery temperature TO is greater than a preset temperature Ti and whether the ambient temperature T is greater than a preset temperature T3.
[0044] (2.1) Whether the battery temperature TO is greater than the preset temperature T1 is determined, and if yes, the cooling mode of the battery water cooling system is enabled, so as to cool the battery modules. Whether the ambient temperature T is greater than the preset temperature 13 and whether a refrigeration mode of the air conditioning component has been enabled are determined, and if yes, the cooling mode of the battery air cooling system is enabled, so as to cool an environment in the battery compartment.
[0045] (2.2) If the ambient temperature T is not greater than the preset temperature T3, the cooling mode of the battery air cooling system is disabled. If the battery temperature TO is not greater than the preset temperature TI, the cooling mode of the battery water cooling system is disabled.
[0046] (3) Whether to enable a heating mode of the battery water cooling system and the battery air cooling system is determined by determining whether the battery temperature TO is less than a preset temperature T2 and whether the ambient temperature T is less than a preset temperature T4.
100471 (3.1) Whether the battery temperature TO is less than the preset temperature T2 is determined, and if yes, the heating mode of the battery water cooling system is enabled, so as to heat the battery modules. Whether the ambient temperature T is less than the preset temperature T4 and whether a heating mode of the air conditioning component has been enabled are determined, and if yes, the heating mode of the battery air cooling system is enabled, so as to heat the environment in the battery compartment.
[0048] (3.2) If the ambient temperature T is not less than the preset temperature T4, the heating mode of the battery air cooling system is disabled. If the battery temperature TO is not less than the preset temperature T2, the heating mode of the battery water cooling system is disabled. [0049] With reference to FIG. 1 to FIG. 3, in steps (2) and (3), when the battery air cooling system is not turned on, if ambient humidity Y in the battery compartment is greater than set humidity Y1, the battery compartment ventilation system is turned on to exchange air for the battery compartment separately. When the battery compartment ventilation system continuously works for more than a preset time Z I, if humidity of the first humidity sensor YO exceeds preset humidity Y2, an vehicle instrument reminds the dryer of abnormalities, and the battery compartment ventilation system is turned off, otherwise, if the ambient humidity Y is not greater than the set humidity Yl, the battery compartment ventilation system is turned off.
[0050] With reference to FIG. Ito FIG. 3, in steps (2.2) and (3.2), the ambient humidity Y is monitored in real time, and if the ambient humidity Y is not greater than the set humidity Y1, whether to turn off the battery air cooling system is determined.
[0051] With reference to FIG. 1 to FIG. 3, in steps (2.2) and (3.2), when the battery air cooling system continuously works for more than a preset time Z1, if humidity of the first humidity sensor YO exceeds preset humidity Y2, an vehicle instrument reminds the dryer of abnormalities, and whether to turn off the battery air cooling system is determined, otherwise, if the ambient humidity Y is not greater than the set humidity Y I, whether to turn off the battery air cooling system is determined.
[0052] In conclusion, when the temperature of the vehicle power battery is high or low due to charging and discharging at a larger rate, the battery water cooling system and the battery air cooling system can be controlled to jointly enable the cooling or heating mode, thus improving the thermal management effect. When the vehicle is in low speed or other power battery charging and discharging state of small rate, the battery air cooling system, the battery water cooling system or the battery compartment power change system can be controlled to work independently, so as to meet the requirements of battery thermal management.
[0053] With reference to FIG. 3, the specific work flow of the above battery dual-thermal management system is described as follows.
100541 Step 51 At the beginning, the vehicle is powered on for self-test. The vehicle control module obtains the battery temperature TO, and the ambient temperature T and the ambient humidity Y of the battery compartment.
[0055] Step S2: The vehicle control module determines whether the battery temperature TO is greater than the preset temperature TI. If so, step 53 is performed. Otherwise, step S13 is performed.
[0056] Step 53: The cooling mode of the battery water cooling system is enabled to cool the battery modules in the battery compartment, and step S4 is performed.
100571 Step S4: The vehicle control module determines whether the ambient temperature T in the battery compartment is greater than T3 and whether the refrigeration mode of the air conditioning component is enabled. If yes, step S5 is performed. Otherwise, step S24 is performed.
100581 Step S5: The vehicle control module controls the exhaust fan to work, so as to enable the cooling mode of the battery air cooling system. Meanwhile, the vehicle control module records the working time of the exhaust fan, and step S6 is performed.
[0059] Step S6: After the exhaust fan works for more than the set time Z1, the vehicle control module determines whether the humidity of the first humidity sensor YO is not greater than the preset humidity Y2. If yes, step 58 is performed. Otherwise, step S7 is performed.
[0060] Step S7: The vehicle instrument reminds the user of desiccant function failure, and reminds the user to replace it, and step S9 is performed.
[0061] Step 58: The vehicle control module determines whether the ambient humidity Yin the battery compartment is not greater than Y1. If yes, step S9 is performed. Otherwise, whether timeout occurs is determined. If timeout occurs, timeout processing is performed. Otherwise, this step is repeated.
[0062] Step S9: The vehicle control module determines whether the ambient temperature T in the battery compartment is not greater than T3. If yes, 510 is performed. Otherwise, this step is repeated.
100631 Step SIO: The vehicle control module turns off the exhaust fan to disable the cooling mode of the battery air cooling system, and step Sll is performed.
[0064] Step S11: The vehicle control module determines whether the battery temperature TO is not greater than the preset temperature Ti. If yes, S12 is performed. Otherwise, this step is repeated.
[0065] Step S12: The cooling mode of the battery water cooling system is disabled, and the process is controlled to end.
100661 Step S13: The vehicle control module determines whether the battery temperature TO is less than the preset temperature T2. If yes, step S14 is performed. Otherwise, S24 is performed. 100671 Step S14: The heating mode of the battery water cooling system is enabled to heat the battery modules in the battery compartment, and step 15 is performed.
[0068] Step S15: The vehicle control module determines whether the ambient temperature Tin the battery compartment is less than T4 and whether the heating mode of the air conditioning component is enabled. If yes, step S16 is performed. Otherwise, step S24 is performed.
[0069] Step S16: The vehicle control module controls the exhaust fan to turn on, so as to enable the heating mode of the battery air cooling system. Meanwhile, the vehicle control module records the working time of the exhaust fan, and step S17 is performed.
[0070] Step S17: After the exhaust fan works for more than the set time Z1, the vehicle control module determines whether the humidity of the first humidity sensor YO is not greater than the preset humidity Y2. If yes, step S19 is performed. Otherwise, step S18 is performed.
100711 Step S18: The vehicle instrument reminds the user of desiccant function failure, and reminds the user to replace it, and step S20 is performed.
[0072] Step S19: The vehicle control module determines whether the ambient humidity Yin the battery compartment is not greater than Yl. If yes, step S20 is performed. Otherwise, whether timeout occurs is determined. If timeout occurs, timeout processing is performed. Otherwise, this step is repeated.
[0073] Step S20: The vehicle control module determines whether the ambient temperature T in the battery compartment is not less than T4. If yes, 521 is performed. Otherwise, this step is repeated.
[0074] Step S21: The vehicle control module turns off the exhaust fan to disable the heating mode of the battery air cooling system, and step S22 is performed.
100751 Step S22: The vehicle control module determines whether the battery temperature TO is not less than the preset temperature T2. If yes, step S23 is performed. Otherwise, this step is repeated.
[0076] Step S23: The heating mode of the battery water cooling system is disabled, and the process is controlled to end.
100771 Step S24: The vehicle control module determines whether the ambient humidity Y in the battery compartment is greater than the preset humidity Yl. If yes, step S25 is performed. Otherwise, step S30 is performed.
[0078] Step S25: The vehicle control module controls the exhaust fan to work, so as to turn on the battery compartment ventilation system. Meanwhile, the vehicle control module records the working time of the exhaust fan, and step S26 is performed.
100791 Step S26: After the exhaust fan works for more than the set time Z1, the vehicle control module determines whether the humidity of the first humidity sensor YO is not greater than the preset humidity Y2. If yes, step S28 is performed. Otherwise, step S27 is performed.
[0080] Step S27: The vehicle instrument reminds the user of desiccant function failure, and reminds the user to replace it, and step S30 is performed.
[0081] Step S28: The vehicle control module determines whether the ambient humidity Y in the battery compartment is not greater than Yl. If yes, step S29 is performed. Otherwise, whether timeout occurs is determined. If timeout occurs, timeout processing is performed. Otherwise, this step is repeated.
100821 Step S29: The vehicle control module turns off the exhaust fan to turn off the battery compartment ventilation system, and step S30 is performed.
[0083] Step S30: Whether the cooling mode of the battery water cooling system has been enabled is determined. If yes, step S1 1 is performed. Otherwise, step S31 is performed.
100841 Step S31: Whether the heating mode of the battery water cooling system has been enabled is determined. If yes, step S22 is performed. Otherwise, the process is controlled to end. [0085] The above described are merely specific implementations of the present disclosure, but the design concept of the present disclosure is not limited thereto. Any non-substantial changes made to the present disclosure based on the concept of the present disclosure should fall within the protection scope of the present disclosure.

Claims (10)

  1. WHAT IS CLAIMED IS: 1. A control method of a module to vehicle (MTV)-based battery dual-thermal management system, wherein the battery dual-thermal management system comprises an air conditioning compartment and a battery compartment independently arranged on a roof of a bus, and an air duct arranged on the roof of the bus, and the air duct is communicated with a passenger compartment and the battery compartment; the air conditioning compartment is provided with an air conditioning component with a refrigerant circuit; the battery compartment is provided with a plurality of battery modules arranged at intervals and is provided with a water cooling circuit with a water cooling plate group, and the water cooling circuit exchanges heat with the refrigerant circuit through a heat exchange plate, so as to form a battery water cooling system; the battery compartment is provided with an air inlet communicated with the air duct and an air outlet communicated with an outside of the bus, so as to form a battery air cooling system with the air conditioning component and the air duct; and the control method comprises the following steps: (1) obtaining a battery temperature TO and an ambient temperature T in the battery compartment; (2) determining whether to enable a cooling mode of the battery water cooling system and the battery air cooling system by determining whether the battery temperature TO is greater than a preset temperature Ti and whether the ambient temperature T is greater than a preset temperature T3: (2.1) determining whether the battery temperature TO is greater than the preset temperature TI, and if yes, enabling the cooling mode of the battery water cooling system, so as to cool the battery modules; and determining whether the ambient temperature T is greater than the preset temperature T3 and whether a refrigeration mode of the air conditioning component has been enabled, and if yes, enabling the cooling mode of the battery air cooling system, so as to cool an environment in the battery compartment; and (2.2) if the ambient temperature T is not greater than the preset temperature T3, disabling the cooling mode of the battery air cooling system; and if the battery temperature TO is not greater than the preset temperature T1, disabling the cooling mode of the battery water cooling system; and (3) detennining whether to enable a heating mode of the battery water cooling system and the battery air cooling system by determining whether the battery temperature TO is less than a preset temperature T2 and whether the ambient temperature T is less than a preset temperature T4: (3.1) determining whether the battery temperature TO is less than the preset temperature T2, and if yes, enabling the heating mode of the battery water cooling system, so as to heat the battery modules; and determining whether the ambient temperature T is less than the preset temperature T4 and whether a heating mode of the air conditioning component has been enabled, and if yes, enabling the heating mode of the battery air cooling system, so as to heat the environment in the battery compartment, and (3.2) if the ambient temperature T is not less than the preset temperature T4, disabling the heating mode of the battery air cooling system, and if the battery temperature TO is not less than the preset temperature T2, disabling the heating mode of the battery water cooling system.
  2. 2. The control method of an MTV-based battery dual-thermal management system according to claim I, wherein the air inlet is provided with a first one-way valve, the air outlet is provided with a second one-way valve, and an exhaust fan is arranged outside the air outlet; and the air conditioning component, the air duct, the first one-way valve, the second one-way valve and the exhaust fan form the battery air cooling system.
  3. 3. The control method of an MTV-based battery dual-thermal management system according to claim 2, wherein the battery dual-thermal management system further comprises a dryer arranged outside the air inlet; the air duct, the dryer, the first one-way valve, the second one-way valve and the exhaust fan form a battery compartment ventilation system; and in steps (2) and (3), when the battery air cooling system is not turned on, if ambient humidity Y in the battery compartment is greater than set humidity Y I, the battery compartment ventilation system is turned on to exchange air for the battery compartment separately.
  4. 4. The control method of an MTV-based battery dual-thermal management system according to claim 3, wherein in steps (2.2) and (3.2), the ambient humidity Y is monitored in real time, and if the ambient humidity Y is not greater than the set humidity YI, whether to turn off the battery air cooling system is determined.
  5. The control method of an MTV-based battery dual-thermal management system according to claim 4, wherein the battery dual-thermal management system further comprises a first humidity sensor and a second humidity sensor, and the first humidity sensor is arranged at a side of the air inlet in the battery compartment; the second humidity sensor is arranged at a side of the air outlet in the battery compartment; and humidity of the first humidity sensor and the second humidity sensor is obtained at the same time, and a maximum of the humidity of the first humidity sensor and the second humidity sensor is taken as the ambient humidity Y in the battery compartment
  6. 6. The control method of an MTV-based battery dual-thermal management system according to claim 5, wherein in steps (2.2) and (3.2), when the battery air cooling system continuously works for more than a preset time Z1, if humidity of the first humidity sensor YO exceeds preset humidity Y2, a vehicle instrument reminds the dryer of abnormalities, and whether to turn off the battery air cooling system is determined, otherwise, if the ambient humidity Y is not greater than the set humidity Yl, whether to turn off the battery air cooling system is determined.
  7. 7. The control method of an MTV-based battery dual-thermal management system according to claim 5, wherein when the battery compartment ventilation system continuously works for more than a preset time Z I, if humidity of the first humidity sensor YO exceeds preset humidity Y2, a vehicle instrument reminds the dryer of abnormalities, and the battery compartment ventilation system is turned off, otherwise, if the ambient humidity Y is not greater than the set humidity Yl, the battery compartment ventilation system is turned off.
  8. 8. The control method of an MTV-based battery dual-thermal management system according to claim 1, wherein the battery dual-thermal management system further comprises a first temperature sensor and a second temperature sensor, and the first temperature sensor is arranged at a side of the air inlet in the battery compartment; the second temperature sensor is arranged at a side of the air outlet in the battery compartment; and temperatures of the first temperature sensor and the second temperature sensor are obtained at the same time, and an average of the temperatures is taken as the ambient temperature T in the battery compartment.
  9. 9 The control method of an MTV-based battery dual-thermal management system according to claim 1, wherein the refrigerant circuit comprises a condenser and a compressor connected with each other; and the water cooling circuit comprises the water cooling plate group, a water pump and a positive temperature coefficient (PTC) heater connected with each other, and the water cooling circuit and the refrigerant circuit are subjected to parallel heat exchange through the heat exchange plate.
  10. 10. The control method of an MTV-based battery dual-thermal management system according to claim 1, wherein the water cooling plate group comprises a plurality of water cooling plates connected with each other and each of the battery modules is provided with one of the water cooling plates.
GB2304378.9A 2022-09-25 2023-03-24 Control method of module to vehicle (MTV)-based battery dual-thermal management system Pending GB2622656A (en)

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CN116190856B (en) * 2023-04-27 2023-07-14 南京航空航天大学 Vehicle-mounted lithium battery temperature control system and control method thereof
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JPH10306722A (en) * 1997-03-05 1998-11-17 Toyota Motor Corp Vehicular battery cooling device
CN105932361A (en) * 2016-07-11 2016-09-07 吉林大学 Complex thermal management system of power battery pack and active control method of temperature consistency
CN112117511A (en) * 2020-04-16 2020-12-22 江苏大学 Air-cooling and liquid-cooling coupled battery thermal management system based on semiconductor

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Publication number Priority date Publication date Assignee Title
JPH10306722A (en) * 1997-03-05 1998-11-17 Toyota Motor Corp Vehicular battery cooling device
CN105932361A (en) * 2016-07-11 2016-09-07 吉林大学 Complex thermal management system of power battery pack and active control method of temperature consistency
CN112117511A (en) * 2020-04-16 2020-12-22 江苏大学 Air-cooling and liquid-cooling coupled battery thermal management system based on semiconductor

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