CN104670000A - Cooling system of hybrid electric vehicle and control method of cooling system - Google Patents
Cooling system of hybrid electric vehicle and control method of cooling system Download PDFInfo
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- CN104670000A CN104670000A CN201310614223.2A CN201310614223A CN104670000A CN 104670000 A CN104670000 A CN 104670000A CN 201310614223 A CN201310614223 A CN 201310614223A CN 104670000 A CN104670000 A CN 104670000A
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- cooling
- water pump
- cooling system
- temperature
- control method
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Abstract
The invention relates to a cooling system of a hybrid electric vehicle and a control method of the cooling system. The cooling system in the control method comprises a power electric box/ electric-driven gearbox cooling subsystem equipped with a first water pump; cooling liquid flows through the first water pump and passes through the power electric box and the electric-driven gearbox; when 1) the temperature TPEB of the power electric box exceeds the first temperature threshold T1, or 2) the temperature TEDU of the electric-driven gearbox exceeds the second temperature threshold T2, or 3) the temperature TPEBCoolant of the cooling liquid at an inlet of the power electric box exceeds the third temperature threshold T3, the first water pump is started.
Description
Technical field
The invention belongs to field of hybrid electric vehicles, relate to cooling system and the control method thereof of plug-in hybrid-power automobile specifically.
Background technology
Along with the day by day exhausted of fossil energy and environmental protection more and more receive the attention of people; electronlmobil receives much concern with its good energy substitution characteristic and environmental protection characteristic; and when power battery technology not yet obtains important breakthrough, plug-in hybrid electric vehicle again due to " zero-emission " characteristic and hybrid vehicle that simultaneously have both pure electric automobile continual mileage advantage and become the important research direction of property energy automobile instantly.
The parts such as electrokinetic cell, drive motor, electric machine controller have been increased newly due to plug-in hybrid-power automobile, and use motor driven compressor to instead of the mechanical compressor of traditional vehicle, therefore the cooling system of plug-in hybrid-power automobile redesigns, and the control method of cooling system is also more complicated compared to traditional vehicle.Current document and patent control for the cooling of design and drive system (drive motor and controller etc. thereof) that the research of the cooling system of hybrid vehicle mainly concentrates on cooling loop, but then compare shortage for the research how cooled electrokinetic cell better and how reduce the aspects such as the power consumption of cooling system by improving control method.
Because electrokinetic cell has very harsh requirement (ideal working temperature is about 20 DEG C ~ 30 DEG C) for operating temperature, need the temperature being reduced refrigerant fluid by air-conditioning compressor to cool it, quite a few electricity of therefore cooling system consumption is the cooling for electrokinetic cell.Plug-in hybrid-power automobile is compared and is also with the important difference of traditional vehicle: vehicle needs to charge, vehicle is when carrying out charging operations (especially DC charging), battery can produce amount of heat, for ensureing the service life of charge efficiency and electrokinetic cell, now also need to cool battery.Another important component part---cooling fan---of cooling system is also the important power consuming portions of cooling system, for reducing the consumption of current of cooling fan further, can introduce PWM control method.
The present invention is by the different cooling requirements from each parts under different operating mode, by rational method for controlling cooling system, meet electrokinetic cell, drive motor, electric machine controller, change speed gear box cooling requirement prerequisite under, the consumption of current of remarkable reduction cooling system, thus reach the object not only ensureing cooling requirement but also vehicle continual mileage can be extended.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of control method of cooling system of hybrid vehicle, is particularly useful for plug-in hybrid-power automobile, meets the cooling requirement under different operating mode, reduces the consumption of current of cooling system simultaneously.
The control method of the cooling system of the hybrid vehicle that the present invention relates to, described cooling system comprises the power electronics case/electricity being wherein provided with the first water pump and drives change speed gear box cooling subsystem, refrigerant fluid flows through described first water pump, and flow through described power electronics case and described electricity drives change speed gear box, when 1) the temperature T of described power electronics case
pEBbeing greater than the first temperature threshold T1, or 2) described electricity drives the temperature T of change speed gear box
eDUbe greater than the second temperature threshold T2, or 3) the temperature T of the refrigerant fluid of the entrance of described power electronics case
pEBCoolantwhen being greater than the 3rd temperature threshold T3, described first water pump is opened.
In above-mentioned control method, alternatively, after described first water pump is opened, when 1) the temperature T of described power electronics case
pEBbeing less than the first temperature threshold T1-10, and 2) described electricity drives the temperature T of change speed gear box
eDUbe greater than the second temperature threshold T2-10, and 3) the temperature T of the refrigerant fluid of the entrance of described power electronics case
pEBCoolantwhen being greater than the 3rd temperature threshold T3-5, described first water pump cuts out.
In above-mentioned control method, alternatively, described cooling system comprises the energy storage system cooling subsystem being wherein provided with electric air-conditioning compressor, the second water pump, and refrigerant fluid flows through described electric air-conditioning compressor, and flow through described second water pump, as the temperature T of the accumulation of energy medium of described energy storage system
cellwhen being greater than the 4th temperature threshold T4, described second water pump is opened.
In above-mentioned control method, alternatively, after described second water pump is opened, as the temperature T of described accumulation of energy medium
cellwhen being greater than the 4th temperature threshold T4+1, described electric air-conditioning compressor is opened.
In above-mentioned control method, alternatively, after described electric air-conditioning compressor is opened, as the temperature T of described accumulation of energy medium
cellbe less than the 4th temperature threshold T4-3, or work as the temperature T of described refrigerant fluid
coolantwhen being less than the 5th temperature threshold T5, described electric air-conditioning is closed.
In above-mentioned control method, alternatively, after described second water pump is opened, as the temperature T of described accumulation of energy medium
cellwhen being less than the 4th temperature threshold T4-5, described second water pump cuts out.
In above-mentioned control method, alternatively, described cooling system comprises power electronics case/electricity and drives change speed gear box cooling subsystem, is wherein provided with the energy storage system cooling subsystem of electric air-conditioning compressor and fan cooling subsystem, described control method comprises driving pattern, and charge mode, when described hybrid vehicle is in DC charging, activates described electric air-conditioning compressor and adopt described driving pattern.
In above-mentioned control method, alternatively, fan speed gear is divided into some shelves, according to described air-conditioning compressor pressure, the speed of a motor vehicle and flow through described power electronics case refrigerant fluid temperature computation of table lookup described in the gear speed of fan.
In above-mentioned control method, alternatively, described fan is PWM fan, and is controlled by mixed movement controller.
In above-mentioned control method, alternatively, described hybrid vehicle is applicable to plug-in hybrid-power automobile.
The cooling system of the hybrid vehicle that the invention still further relates to, comprise power electronics case/electricity and drive change speed gear box cooling subsystem, energy storage system cooling subsystem and fan cooling subsystem, described power electronics case/electricity drives change speed gear box cooling subsystem and comprises coolant storage and the first water pump, from the refrigerant fluid of described coolant storage by described first water pump, flow through after described power electronics case and described electricity drive change speed gear box and turn back to described coolant storage.
The cooling system of the hybrid vehicle that the invention still further relates to, comprise power electronics case/electricity and drive change speed gear box cooling subsystem, energy storage system cooling subsystem and fan cooling subsystem, described energy storage system cooling subsystem comprises electric air-conditioning compressor, cooling evaporator and the second water pump, refrigerant fluid flows through described electric air-conditioning compressor and described cooling evaporator, gets back to described cooling evaporator after flowing through for stored energy electrokinetic cell from the refrigerant fluid of described cooling evaporator by described second water pump.
In above-mentioned cooling system, alternatively, the refrigerant fluid from described cooling evaporator also flows into described electric air-conditioning compressor by condenser.
The present invention is specially applicable to the control system of motor vehicle driven by mixed power.A kind of cooling system and control method thereof of plug-in hybrid-power automobile are provided, the cooling requirement of vehicle at operational process medium power battery, drive motor, electric machine controller, change speed gear box can be met, the consumption of current of cooling system can also be reduced to greatest extent simultaneously, effective saving electric energy, reduce discharge, extend the continual mileage of vehicle.
By the detailed description below with reference to accompanying drawing, other aspects and features of the present invention become obvious.But it should be known that this accompanying drawing is only the object design of explanation, instead of as the restriction of scope of the present invention, this is because it should with reference to additional claim.Should also be appreciated that, accompanying drawing is only intended to structure described herein and flow process are described conceptually, unless otherwise noted, unnecessaryly draws accompanying drawing to scale.
Accompanying drawing explanation
Consult the detailed description of following detailed description of the invention by reference to the accompanying drawings, present invention will become more fully understood, and reference numbers same in accompanying drawing refers to element same in view all the time.Wherein:
Fig. 1 is the constructional drawing of the cooling system of the hybrid vehicle that the present invention relates to;
Fig. 2 is the diagram of circuit of the control method of the cooling system of the hybrid vehicle that the present invention relates to.
Detailed description of the invention
For the theme helping those skilled in the art can understand application claims protection definitely, describe the specific embodiment of the present invention in detail below in conjunction with accompanying drawing.
Be different from traditional vehicle only just has cooling demand when vehicle travels, plug-in hybrid-power automobile also has the demand of cooling when charging; In addition, the parts (especially electrokinetic cell) of plug-in hybrid-power automobile have more harsh requirement for operating temperature, and this has higher requirement to the control method of cooling system.The present invention will propose a kind of method for controlling cooling system of novelty, improves the work efficiency of cooling system, meets the cooling requirement of plug-in hybrid-power automobile under different operating mode, reduce the consumption of current of cooling system simultaneously.
As shown in Figure 1, this control system is made up of three parts in the control of this cooling system: PEB/EDU cooling controls, ESS cooling controls and PWM Fan Control.The specific implementation flow process of method processed as shown in Figure 2.
(1) PEB/EDU cooling controls
PEB(Power Electronics Box) be power electronics case, comprise electric machine controller, actuator and DC/DC, EDU(Electric Drive Unit) for electricity drives change speed gear box, comprise drive motor and change speed gear box.This cooling subsystem is made up of refrigerant fluid, coolant circuit, the first cooling water pump.Refrigerant fluid successively will flow through PEB and EDU, then returns coolant storage.
The control method of this cooling subsystem is as follows: for reducing water pump consumption of current, only has the temperature when PEB, EDU or PEB entrance refrigerant fluid just to start the first cooling water pump higher than during certain threshold value, that is:
A. T
pEB>T1, or T
eDU>T2, or T
pEBCoolantduring >T3, water pump is opened;
B. T
pEB<T1-10 DEG C, and T
eDU<T2-10 DEG C, and T
pEBCoolantduring <T3-5 DEG C, water pump cuts out.
(2) ESS cooling controls
ESS(Energy Storage System) be energy storage system, comprise electrokinetic cell and controller thereof.ESS cooling control system is made up of electric air-conditioning compressor, cooling evaporator, the second cooling water pump and cooling loop etc.
The control method of this cooling subsystem is as follows:
A. to drive a vehicle pattern
If a1. cooling-liquid temperature (T
coolant) lower than T5, electric air-conditioning compressor and cooling evaporator are closed;
If a2. battery core temperature (T
cell) higher than T4, then the second water pump is opened, if rear battery core temperature opened by the second water pump be down to T4-5 DEG C, then the second water pump cuts out;
If a3. cooling-liquid temperature is higher than T5, the second water pump is opened, and battery core temperature is higher than T4+1 DEG C, then electric control compressor and cooling evaporator are opened;
If a4. cooling-liquid temperature is higher than T5, and (the second water pump cuts out, or battery core temperature is lower than T4-3 DEG C), then electric control compressor and cooling evaporator are closed;
B. charge mode
If b1. carry out AC charging, then without the need to cooling;
If b2. carry out DC charging, then carry out cooling by the control method of driving pattern and control.
(3) PWM Fan Control
Cooling fan is the large electricity consumer in cooling system, and the cooling effectiveness improving fan greatly can reduce the consumption of current of cooling system.For improving the cooling effectiveness of fan, the present invention adopts PWM fan to carry out alternative traditional high and low shelves fan.
PWM fan, by HCU(Hybrid Control Unit, mixes movement controller) control, control method is as follows:
Fan gear is divided into 10 grades, the control gear of PWM fan is gone out according to the state (HVACOn, namely whether air-conditioning runs) of air-conditioning compressor, air-conditioning compressor pressure (Pressure), the speed of a motor vehicle (VehicleSpeed), PEB cooling-liquid temperature (PEBCoolantTemp) computation of table lookup.
Wherein, the first temperature threshold T1, the second temperature threshold T2, the 3rd temperature threshold T3, the 4th temperature threshold T4, the 5th temperature threshold T5 are five independences, do not have related temperature threshold, can separately set up like this, simplify rate-determining steps, are convenient to management.
The control method of the cooling system of plug-in hybrid-power automobile involved in the present invention is formed primarily of three controls subsystem: PEB/EDU cooling controls, ESS cooling controls and PWM Fan Control.For adapting to the different operating modes of hybrid vehicle, under charge mode and driving pattern, the mode of operation of cooling system is had nothing in common with each other again, thus the cooling requirement of each parts under different operating mode can be ensured, the consumption of current of cooling system can be reduced again to greatest extent, save electric energy and also reduce discharge.
Above detailed description of the invention is only for illustration of the present invention; and be not limitation of the present invention; the those of ordinary skill of relevant technical field; without departing from the scope of the invention; can also make a variety of changes and modification; therefore all equivalent technical schemes also belong to category of the present invention, and scope of patent protection of the present invention should be defined by the claims.
Claims (13)
1. the control method of the cooling system of hybrid vehicle, it is characterized in that: described cooling system comprises the power electronics case/electricity being wherein provided with the first water pump and drives change speed gear box cooling subsystem, refrigerant fluid flows through described first water pump, and flow through described power electronics case and described electricity drives change speed gear box, when 1) the temperature T of described power electronics case
pEBbeing greater than the first temperature threshold T1, or 2) described electricity drives the temperature T of change speed gear box
eDUbe greater than the second temperature threshold T2, or 3) the temperature T of the refrigerant fluid of the entrance of described power electronics case
pEBCoolantwhen being greater than the 3rd temperature threshold T3, described first water pump is opened.
2. the control method of the cooling system of hybrid vehicle according to claim 1, is characterized in that: after described first water pump is opened, when 1) the temperature T of described power electronics case
pEBbeing less than the first temperature threshold T1-10, and 2) described electricity drives the temperature T of change speed gear box
eDUbe greater than the second temperature threshold T2-10, and 3) the temperature T of the refrigerant fluid of the entrance of described power electronics case
pEBCoolantwhen being greater than the 3rd temperature threshold T3-5, described first water pump cuts out.
3. the control method of the cooling system of hybrid vehicle according to claim 1, it is characterized in that: described cooling system comprises the energy storage system cooling subsystem being wherein provided with electric air-conditioning compressor, the second water pump, refrigerant fluid flows through described electric air-conditioning compressor, and flow through described second water pump, as the temperature T of the accumulation of energy medium of described energy storage system
cellwhen being greater than the 4th temperature threshold T4, described second water pump is opened.
4. the control method of the cooling system of hybrid vehicle according to claim 3, is characterized in that: after described second water pump is opened, as the temperature T of described accumulation of energy medium
cellwhen being greater than the 4th temperature threshold T4+1, described electric air-conditioning compressor is opened.
5. the control method of the cooling system of hybrid vehicle according to claim 4, is characterized in that: after described electric air-conditioning compressor is opened, as the temperature T of described accumulation of energy medium
cellbe less than the 4th temperature threshold T4-3, or work as the temperature T of described refrigerant fluid
coolantwhen being less than the 5th temperature threshold T5, described electric air-conditioning is closed.
6. the control method of the cooling system of hybrid vehicle according to claim 3, is characterized in that: after described second water pump is opened, as the temperature T of described accumulation of energy medium
cellwhen being less than the 4th temperature threshold T4-5, described second water pump cuts out.
7. the control method of the cooling system of hybrid vehicle according to claim 1, it is characterized in that: described cooling system comprises fan cooling subsystem, described control method comprises driving pattern, and charge mode, when described hybrid vehicle is in DC charging, activates described electric air-conditioning compressor and adopt described driving pattern.
8. the control method of the cooling system of hybrid vehicle according to claim 7, it is characterized in that: fan speed gear is divided into some shelves, according to described air-conditioning compressor pressure, the speed of a motor vehicle and flow through described power electronics case refrigerant fluid temperature computation of table lookup described in the gear speed of fan.
9. the control method of the cooling system of hybrid vehicle according to claim 8, is characterized in that: described fan is PWM fan, and is controlled by mixed movement controller.
10. the control method of the cooling system of the hybrid vehicle according to any one of claim 1-9, is characterized in that: described hybrid vehicle is applicable to plug-in hybrid-power automobile.
The cooling system of 11. hybrid vehicles, it is characterized in that: comprise power electronics case/electricity and drive change speed gear box cooling subsystem, energy storage system cooling subsystem and fan cooling subsystem, described power electronics case/electricity drives change speed gear box cooling subsystem and comprises coolant storage and the first water pump, from the refrigerant fluid of described coolant storage by described first water pump, flow through after described power electronics case and described electricity drive change speed gear box and turn back to described coolant storage.
The cooling system of 12. hybrid vehicles, it is characterized in that: comprise power electronics case/electricity and drive change speed gear box cooling subsystem, energy storage system cooling subsystem and fan cooling subsystem, described energy storage system cooling subsystem comprises electric air-conditioning compressor, cooling evaporator and the second water pump, refrigerant fluid flows through described electric air-conditioning compressor and described cooling evaporator, gets back to described cooling evaporator after flowing through for stored energy electrokinetic cell from the refrigerant fluid of described cooling evaporator by described second water pump.
The cooling system of 13. hybrid vehicles according to claim 12, is characterized in that: the refrigerant fluid from described cooling evaporator also flows into described electric air-conditioning compressor by condenser.
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| CN109398061A (en) * | 2018-12-19 | 2019-03-01 | 海马汽车有限公司 | Hybrid vehicle heat management system and control method and hybrid vehicle |
| CN111766079A (en) * | 2019-03-31 | 2020-10-13 | 上海华依科技集团股份有限公司 | Engine oil temperature control method applied to pure electric vehicle gearbox bench test |
| WO2023000366A1 (en) * | 2021-07-19 | 2023-01-26 | 武汉理工大学 | Temperature control method and module for heat dissipation system of new energy commercial vehicle |
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| Publication number | Publication date |
|---|---|
| CN104670000B (en) | 2018-06-19 |
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