Intelligentized multi-loop thermal management system of electric automobile

A thermal management system and electric vehicle technology, applied in the field of intelligent multi-circuit electric vehicle thermal management system, can solve the problems of reducing heat dissipation and heating, short vehicle cruising range, and fewer control circuits, so as to maintain heat balance and ensure efficient operation Effect

Pending Publication Date: 2017-08-29
SHANGHAI COTECH AUTOMOTIVE ENG CORP LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the electric vehicles currently on the market do not have significant energy-saving thermal management systems, and the air-conditioning system, power battery pack cooling system, and electric drive module cooling system are either not related to each other, or the correlation is not enough; when the power battery pack When cooling, usually either rely too much on the air conditioner for cooling, or rely on adding a battery radiator in front of the condenser for cooling, which will not only have a negative impact on the performance of the air conditioner and the heat dissipation effect of the electric drive system, but also lead to the efficiency of the front-end module. reduce, and will increase the wind resistance of the vehicle, making the power and economy of the vehicle worse
When the power battery and the passenger compartment need to be heated, they usually rely too much on the PTC heater, resulting in a shorter cruising range of the vehicle
[0003] Chinese patent CN 205768485 U discloses an electric vehicle intelligent thermal management system, which consists of a front heat exchanger, a passenger compartment heat exchanger, a TV, an electric control system, a drive motor water pump, a four-way reversing valve, a compressor, an electromagnetic It is composed of two three-way ball valves, evaporator, water pump, battery handle, heat pipe, and battery heat exchanger, so that the heat energy of the three major thermal management systems of the vehicle's air conditioning system, drive motor electronic control system, and battery pack thermal management system Fully utilize each other, reduce the demand for heat dissipation and heating on battery energy, ensure the temperature balance between each battery cell, prolong the cruising range and the service life of the battery system, but the control loop formed by this system is relatively small, and the system cannot be effectively used. The function of each part in

Method used

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  • Intelligentized multi-loop thermal management system of electric automobile
  • Intelligentized multi-loop thermal management system of electric automobile
  • Intelligentized multi-loop thermal management system of electric automobile

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066] refer to figure 1 , an intelligent multi-circuit electric vehicle thermal management system, including a power battery pack 38, a drive motor, a motor controller, an on-board charger 7, a DC / DC converter 40, a battery radiator 35, a battery cooler 23, and a motor heat dissipation 15, electric water pump, electric oil pump, expansion tank 17, PTC heater, heat exchanger, electric compressor 24, condenser 18, evaporator 21, liquid storage drying pot 19, warm air core 27, four-way valve 16 , three-way valve, straight-through valve and electronic expansion valve.

[0067] In the present embodiment, drive motor is provided with 2, comprises first drive motor 10, second drive motor 11; Motor controller is provided with 2, comprises first motor controller 5, second motor controller 6; Electric water pump There are 4 electric water pumps, including the first electric water pump 1, the second electric water pump 3, the third electric water pump 31, and the fourth electric water ...

Embodiment 2

[0073]When the electric vehicle is running, the power battery pack 38 needs to be kept in a suitable temperature range. For lithium-ion batteries, it is generally considered that the temperature is in a reasonable range in the range of 0-40°C, neither too hot nor too cold. When the temperature of the power battery pack 38 is in a reasonable range, but the temperature difference between the individual cells is too large, beyond the reasonable range (usually it is considered that the temperature difference between the single cells is less than 5°C is a reasonable range), the power battery pack needs to be adjusted. 38 for temperature equalization.

[0074] refer to figure 2 , the coolant is driven by the fourth electric water pump 32, first flows into the inlet A of the third three-way valve 33 and then flows out from the outlet C, and then flows through the second PTC heater 37 (at this time, the second PTC heater 37 is not working), Then flow into the internal cooling pipel...

Embodiment 3

[0079] refer to Figure 6 and Figure 7 , the first electric oil pump 12, the first drive motor 10, and the first heat exchanger 8 are connected in series to form a first drive motor oil cooling circuit; the second electric oil pump 13, the second drive motor 11, and the second heat exchanger 9 The connection forms the second drive motor oil cooling circuit. The drive motor oil cooling circuit has more advantages than the traditional motor liquid cooling circuit, because the insulating heat transfer oil can enter the drive motor to directly cool the motor rotor, and the cooling effect is better.

[0080] refer to Figure 8 , consisting of the first electric water pump 1, the first through valve 2, the first motor controller 5, the first heat exchanger 8, the second electric water pump 3, the first three-way valve 4, the second motor controller 6, the first Two heat exchangers 9, an on-board charger 7, a second three-way valve 14, a motor radiator 15, a first electric fan 25...

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PUM

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Abstract

The invention relates to an intelligentized multi-loop thermal management system of an electric automobile. The intelligentized multi-loop thermal management system comprises a power battery pack, a driving motor, a motor controller, a vehicle-mounted electric-charger, a DC / DC transducer, a battery radiator, a battery refrigerator, a motor radiator, a motor water pump, a motor oil pump, an expansion water tank, a PTC heater, a heat exchanger, a motor compressor, a condenser, a liquid storage drying kettle, an evaporator, a electric expansion valve and a heater core body. By interconnection between a direct-through valve, a three-direction valve and a four-way valve, a plurality of heat management controlling circuit is formed. Compare with the existing technology, the intelligentized multi-loop thermal management system forms a plurality of circuits which can meet different cooling or heating requirements. According to the power battery pack of the electric automobile, a electric-driving module and air-condition character and working status of passenger compartments, the circuits are selectively opened or closed, temperature balancing and high-efficiency run of the electric automobile are guaranteed, system energy is saved significantly, endurance mileage of the electric automobile is prolonged, and economy of automobiles is improved.

Description

technical field [0001] The invention belongs to the technical field of electric vehicles, and in particular relates to an intelligent multi-circuit electric vehicle thermal management system. Background technique [0002] As countries around the world pay more and more attention to environmental pollution and oil and other energy consumption issues, the development prospects of electric vehicles are generally optimistic, and their production and sales are increasing year by year. It is expected to completely replace traditional fuel vehicles in the future. Compared with traditional cars, electric vehicles have no exhaust emissions and are very friendly to the environment. However, there are still some development bottlenecks for electric vehicles at this stage. Their charging time is longer, and their full-charge mileage has no advantage compared with traditional cars. In order to reduce the gap with conventional vehicles in cruising range, electric vehicles are required to ...

Claims

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Application Information

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IPC IPC(8): B60L11/18H01M10/613H01M10/615H01M10/625B60H1/00B60K11/02
CPCB60H1/00007B60H1/00278B60H1/00392B60K11/02B60L50/50B60L58/26B60L58/27Y02T10/88Y02T10/70
Inventor 夏应波张志伟吴云飞
Owner SHANGHAI COTECH AUTOMOTIVE ENG CORP LTD
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