AU2021101482A4 - Temperature control device for battery of electric automobile - Google Patents

Temperature control device for battery of electric automobile Download PDF

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Publication number
AU2021101482A4
AU2021101482A4 AU2021101482A AU2021101482A AU2021101482A4 AU 2021101482 A4 AU2021101482 A4 AU 2021101482A4 AU 2021101482 A AU2021101482 A AU 2021101482A AU 2021101482 A AU2021101482 A AU 2021101482A AU 2021101482 A4 AU2021101482 A4 AU 2021101482A4
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AU
Australia
Prior art keywords
water
battery
electromagnetic valve
temperature control
copper pipe
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
AU2021101482A
Inventor
Jie BI
Ping Fu
Guangxu Luan
Chenxu Wang
Junfei Wu
Shuo YIN
Mingsai Zhang
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Qingdao University of Science and Technology
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Qingdao University of Science and Technology
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Priority to AU2021101482A priority Critical patent/AU2021101482A4/en
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Publication of AU2021101482A4 publication Critical patent/AU2021101482A4/en
Ceased 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
    • H01M10/65—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
    • H01M10/61—Types of temperature control
    • H01M10/613—Cooling or keeping cold
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/62—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
    • H01M10/657—Means for temperature control structurally associated with the cells by electric or electromagnetic means
    • H01M10/6572—Peltier elements or thermoelectric devices
    • 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
    • B60L2240/40—Drive Train control parameters
    • B60L2240/54—Drive Train control parameters related to batteries
    • B60L2240/545—Temperature
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L50/00—Electric propulsion with power supplied within the vehicle
    • B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
    • B60L50/60—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2200/00—Safety devices for primary or secondary batteries
    • H01M2200/10—Temperature sensitive devices
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)

Abstract

The invention discloses temperature control device for battery of electric automobile, which comprises water tank 8, water pump 2, TEC semiconductor 6, electromagnetic valve 3, electromagnetic valve 4, water drain 5, radiating copper pipe 7, battery box 9 and temperature relay 1. The invention uses the paltier effect of semiconductor materials and soaking heat dissipation. Water flows out through the water outlet of water tank 8 via water pump 2 and is linked with a three-way valve. The water outlet of the three-way valve is linked with an electromagnetic valve 4, and then is directly introduced into water drain 5, which is generally installed at the windward position of electric vehicles, and the heat dissipation effect is enhanced by the windward position of electric vehicles. The water outlet of water drain 5 is connected to the water inlet of TEC semiconductor 6, and finally, radiating copper pipe 7 assembly is introduced. The water outlet 2 of the three-way valve is connected with an electromagnetic valve 3, then connected with a TEC semiconductor 6, and finally connected with a radiating copper pipe 7. Multi-channel water pipe control of three way valve is used in conjunction with active thermal control module, which mainly works through on-off of solenoid valve and signal recognition of temperature sensor. 2/2 11 10 7 100 1 2 3 4 5 Figure 2

Description

2/2
11 10
7
100
1 2 3 4 5 Figure 2
Temperature control device for battery of electric automobile
TECHNICAL FIELD The invention relates to the field of electric vehicle power batteries, in particular to temperature control device for battery of electric automobile.
BACKGROUND Environmental pollution and energy shortage are two important challenges facing the development of automobile industry today. As a typical representative of new energy vehicles, electric vehicles are undoubtedly an important symbol in the process of automobile development. The power battery pack on the electric vehicle consists of several battery packs, each of which is formed by closely arranging and connecting battery cells in series. When the battery is charged and discharged, the battery will generate a large amount of heat. If the heat is not dissipated in time or the heat dissipation is uneven, the local temperature of the battery pack will be too high, resulting in a sharp deterioration of the battery performance. If the outdoor temperature is extremely low in cold winter, the battery cannot be charged and discharged normally, which makes the battery unable to work normally. Up till now, the cooling methods of power battery thermal management system mainly include air cooling, liquid cooling, heat pipe cooling and phase change material cooling. The engineering application is mainly air cooling, and liquid circulation cooling gradually begins. Natural convection cooling depends on the temperature of the external environment to a great extent, and the cooling effect is not obvious. Forced convection cooling can achieve the desired cooling effect by taking measures such as changing the ventilation rate according to the actual use situation, but it is difficult to completely and evenly apply the wind to the heating and radiating surfaces of objects. Although the heat exchange effect of liquid is better than that of air, the disadvantages are that it needs liquid medium flow space and external heat dissipation circulation system, which requires high sealing performance, heavy weight and relatively complex structure.
SUMMARY The technical problem to be solved by the present invention is to provide a battery temperature control device for electric vehicles. The temperature control system adopts different temperature control measures according to different temperatures, so as to achieve the purposes of heating and cooling, effectively save energy, avoid unnecessary energy consumption, improve heat transfer efficiency, ensure uniform temperature among the battery cells in the battery box, effectively improve the electrochemical performance and service life of the battery, and avoid potential thermal runaway. Temperature control device for battery of electric automobile is comprised of water tank 8, water pump 2, TEC semiconductor 6, electromagnetic valve 3, electromagnetic valve 4, water drain 5, radiating copper pipe 7, battery box 9 and temperature relay 1.The water tank 8 is provided with a water inlet, a water outlet and a water injection port, the water inlet of the water pump 2 is connected with the water outlet of the water pump 2 through a hose, the electromagnetic valve 4 is connected with the three-way valve 10, the water inlet of the water drain 5 is connected with the electromagnetic valve 4 through a hose,the electromagnetic valve 3 is connected with the three-way valve 10, and the outlet of the electromagnetic valve 3 is connected with the water inlet of the TEC semiconductor 6 assembly through a hose, the water outlet of the TEC semiconductor assembly 6 is connected with the water inlet of the copper pipe 7, and the water outlet of the copper pipe 7 is connected with the water inlet of the water tank 8 through a hose. Further, the radiating copper pipe 7 is U-shaped, and a plurality of radiating copper pipes 7 are installed side by side above the battery pack in the battery box 9 Further, the water drain 5 is installed at the windward position in front of the electric vehicle. Further, the battery box 9 is filled with transformer oil 11, and the heat dissipation copper pipe 7 and the battery pack are immersed in the transformer oil 11.
Further, the temperature relay 1, the electromagnetic valve 3 , the electromagnetic valve 4 and the three-way valve 10 constitute a multi-channel intelligent temperature control system. The invention has the beneficial effects that when the ambient temperature is lower than 50C, the electromagnetic valve 3 is opened and the electromagnetic valve 4 is closed, and the cooling liquid does not pass through the water discharge, and then directly enters the TEC semiconductor assembly, and the TEC semiconductor is electrified to heat the power lithium battery pack. When the temperature of the battery box is 50 C to 250 C, the temperature is suitable for the power battery, and the cooling system does not work. When the ambient temperature is between 250 C and 350 C, the solenoid valve 3 is closed and the electromagnetic valve 4 is opened, and the coolant directly enters the water drain. At this time, TEC semiconductor is not powered on. Because the ambient temperature is suitable at this time, the heat dissipation effect and cooling effect are enhanced by using the ambient temperature and the upwind of the electric vehicle, which is enough to dissipate the heat produced by the power lithium battery pack. Achieve the effect of saving energy. When the ambient temperature is above 350 C, the electromagnetic valve 3 is closed, the electromagnetic valve 4 is opened, and the cooling liquid enters the TEC semiconductor assembly through water discharge. At this time, the TEC semiconductor is powered on for refrigeration. At this time, the heat produced by the power lithium battery pack can be better dissipated by using the active refrigeration of the TEC semiconductor and the cooling effect of the ambient temperature. The temperature control system makes the battery cells work at a proper temperature, ensures the temperature uniformity of the battery pack and the battery cells, and makes the battery pack and the battery cells in a relatively uniform temperature field. There are two kinds of battery thermal management: battery cooling and battery heating. High temperature needs cooling and low temperature needs heating, so that the battery can work within the normal temperature range.
BRIEF DESCRIPTION OF THE FIGURES Fig. 1 is a structural diagram of a temperature control system for a power lithium battery of a TEC enhanced immersion electric vehicle; Fig. 2 is a top view of the temperature control system for the power lithium battery of TEC enhanced immersion electric vehicle Wherein, temperature relay 1, water pump 2, electromagnetic valve 3, electromagnetic valve 4, water drain 5, TEC semiconductor 6, radiating copper pipe 7, water tank 8, battery box 9, three-way valve 10, transformer oil 11.
DESCRIPTION OF THE INVENTION The following paragraphs will clearly and completely describe the novel technical scheme and advantages of this book with reference to the drawings of the present invention. However, it should be understood that the described embodiments are only partial embodiments of the present invention, but not all embodiments. All other embodiments obtained by ordinary technicians in the field without creative labor belong to the protection scope of the present invention. Referring to figure 1, Temperature control device for battery of electric automobile is characterized in comprising water tank 8, water pump 2, TEC semiconductor 6, electromagnetic valve 3, electromagnetic valve 4, water drain 5, radiating copper pipe 7, battery box 9 and temperature relay 1.The water tank 8 is provided with a water inlet, a water outlet and a water injection port, the water inlet of the water pump 2 is connected with the water outlet of the water pump 2 through a hose, the electromagnetic valve 4 is connected with the three-way valve 10, the water inlet of the water drain 5 is connected with the electromagnetic valve 4 through a hose,the electromagnetic valve 3 is connected with the three-way valve 10, and the outlet of the electromagnetic valve 3 is connected with the water inlet of the TEC semiconductor 6 assembly through a hose, the water outlet of the TEC semiconductor assembly 6 is connected with the water inlet of the copper pipe 7, and the water outlet of the copper pipe 7 is connected with the water inlet of the water tank 8 through a hose.
In the embodiment, the radiating copper pipe 7 is U-shaped, and a plurality of radiating copper pipes 7 are installed side by side above the battery pack in the battery box 9 In the embodiment, the water drain 5 is installed at the windward position in front of the electric vehicle. In the embodiment, the battery box 9 is filled with transformer oil 11, and the heat dissipation copper pipe 7 and the battery pack are immersed in the transformer oil 11. Immersion cooling simplifies these heat dissipation designs and improves heat transfer efficiency. The battery cells are all immersed in the liquid substance, and the liquid substance is an endothermic material with high flash point. On the one hand, the battery pack is always in a suitable use environment, and a large amount of heat generated during the operation of the battery pack is taken away in time. On the other hand, keeping the temperature uniform among the battery cells in the battery pack and avoiding the battery pressure difference caused by excessive temperature difference can not only effectively improve the electrochemical performance and service life of the battery, but also avoid the hidden danger of thermal runaway caused by local overheating. In this embodiment, the soaking solution is transformer oil 11, and the main functions of transformer oil 11 are: (1) insulation effect: transformer oil 11 has much higher insulation strength than air. Immersing insulating materials in oil can not only improve the insulation strength, but also protect them from moisture. (2) Heat dissipation effect: Transformer oil 11 has large specific heat and is often used as coolant. When the transformer is running, the heat generated makes the oil near the iron core and winding swell and rise. Through the up-and-down convection of the oil, the heat is dissipated through the radiator to ensure the normal operation of the transformer. (3) Arc suppression: On the on-load voltage regulating switches of oil circuit breakers and transformers, arcing will occur when the contacts are switched. Because the transformer oil 11 has good thermal conductivity, and can contact a large amount of gas under the action of high temperature of arc, a large pressure is generated, so that the arc extinguishing performance of medium is improved, and the arc is extinguished quickly.
In the TEC semiconductor module 6 adopted in the present invention, heat dissipation fins are arranged below the chip. Since the principle of semiconductor is heat pump effect, the heat transferred from semiconductor chip must be dissipated in time, otherwise the chip will burn out easily. In order to enhance the heat dissipation effect of the fin, two fans are installed at both ends of the fin, one fan sucks air and the other fan blows air, so that the temperature of the fin can be efficiently radiated. Semiconductor components can not only cool, but also heat, and the operation and control are very simple, only by changing the current direction. In order to realize the purpose of intelligent control, this design adopts the positive and negative switching module of temperature control, which can recognize the temperature signal through the sensor according to the preset temperature, thus automatically realizing the functions of TEC cooling and heating. In this embodiment, the temperature relay 1, electromagnetic valve 3, electromagnetic valve 4, and the three-way valve 10 constitute a multi-channel intelligent temperature control system. According to different temperatures, different temperature control measures can be adopted, which can effectively save energy, avoid unnecessary energy consumption and have better temperature control effect. In this embodiment, the working mode of the intelligent temperature control system is as follows: when the ambient temperature is lower than 5 °C, the electromagnetic valve 3 is opened and the electromagnetic valve 4 is closed, and the cooling liquid does not pass through the water drain 5, and then directly enters the TEC semiconductor assembly 6, and the TEC semiconductor 6 is powered on to heat the power lithium battery pack. When the temperature of the battery box is 50 C to 250 C, the temperature is suitable for the power battery, and the cooling system does not work. When the ambient temperature is between 250 C and 35 0C, the solenoid valve 3 is closed and the solenoid valve 4 is opened, and the coolant directly enters the water drain 5, at which time the TEC semiconductor 6 is not powered on.Because the ambient temperature is suitable at this time, the heat dissipation effect and cooling effect are enhanced by using the ambient temperature and the upwind of the electric vehicle, which is enough to dissipate the heat produced by the power lithium battery pack. Achieve the effect of saving energy. When the ambient temperature is above 35 degrees Celsius, the electromagnetic valve 3 is closed, the electromagnetic valve 4 is opened, and the cooling liquid enters the TEC semiconductor assembly 6 through the water drain 5. At this time, the TEC semiconductor 6 is powered on for refrigeration. At this time, the TEC semiconductor 6 is used for active refrigeration and the cooling effect of the ambient temperature can better dissipate the heat produced by the power lithium battery pack. The above-mentioned embodiments are preferred embodiments of the present invention, but the present invention is not limited by the above-mentioned embodiments. The above-mentioned embodiments and descriptions only describe the principles of the present invention. Without departing from the spirit and scope of the present invention, there are various changes and improvements in the present invention, which are within the scope of protection of the present invention.

Claims (5)

THE CLAIMS DEFINING THE INVENTION ARE AS FOLLOWS:
1. Temperature control device for battery of electric automobile is characterized in comprising water tank 8, water pump 2, TEC semiconductor 6, electromagnetic valve 3, electromagnetic valve 4, water drain 5, radiating copper pipe 7, battery box 9 and temperature relay 1.The water tank 8 is provided with a water inlet, a water outlet and a water injection port, the water inlet of the water pump 2 is connected with the water outlet of the water pump 2 through a hose, the electromagnetic valve 4 is connected with the three-way valve 10, the water inlet of the water drain 5 is connected with the electromagnetic valve 4 through a hose,the electromagnetic valve 3 is connected with the three-way valve 10, and the outlet of the electromagnetic valve 3 is connected with the water inlet of the TEC semiconductor 6 assembly through a hose, the water outlet of the TEC semiconductor assembly 6 is connected with the water inlet of the copper pipe 7, and the water outlet of the copper pipe 7 is connected with the water inlet of the water tank 8 through a hose.
2. According to claim 1, temperature control device for battery of electric automobile is characterized in that the radiating copper pipe 7 is U-shaped, and a plurality of radiating copper pipes 7 are installed side by side above the battery pack in the battery box 9
3. According to claim 1, temperature control device for battery of electric automobile is characterized in that the water drain 5 is installed at the windward position in front of the electric vehicle.
4. According to claim 1, temperature control device for battery of electric automobile is characterized in that the battery box 9 is filled with transformer oil 11, and the heat dissipation copper pipe 7 and the battery pack are immersed in the transformer oil 11.
5. According to claim 1, temperature control device for battery of electric automobile is characterized in that the temperature relay 1, the electromagnetic valve 3 , the electromagnetic valve 4 and the three-way valve 10 constitute a multi-channel intelligent temperature control system.
Figure 1 FIGURES 1/2
Figure 2 2/2
AU2021101482A 2021-03-23 2021-03-23 Temperature control device for battery of electric automobile Ceased AU2021101482A4 (en)

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AU2021101482A AU2021101482A4 (en) 2021-03-23 2021-03-23 Temperature control device for battery of electric automobile

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117818673A (en) * 2024-03-06 2024-04-05 成都壹为新能源汽车有限公司 Double-rail flaw detection tractor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117818673A (en) * 2024-03-06 2024-04-05 成都壹为新能源汽车有限公司 Double-rail flaw detection tractor

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