CN104670000B - The cooling system and its control method of hybrid vehicle - Google Patents
The cooling system and its control method of hybrid vehicle Download PDFInfo
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- CN104670000B CN104670000B CN201310614223.2A CN201310614223A CN104670000B CN 104670000 B CN104670000 B CN 104670000B CN 201310614223 A CN201310614223 A CN 201310614223A CN 104670000 B CN104670000 B CN 104670000B
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Abstract
The present invention relates to the cooling systems and its control method of a kind of hybrid vehicle.In the control method, power electronics case/electricity that the cooling system includes being provided with the first water pump drives gearbox cooling subsystem, and coolant flows through first water pump, and flows through the power electronics case and the electricity drive gearbox, when 1）The temperature T of the power electronics casePEBMore than the first temperature threshold T1 or 2）The electricity drives the temperature T of gearboxEDUMore than second temperature threshold value T2 or 3）The temperature T of the coolant of the inlet of the power electronics casePEBCoolantDuring more than third temperature threshold T3, first water pump is opened.
Description
Technical field
The invention belongs to field of hybrid electric vehicles, in particular relate to plug-in hybrid-power automobile cooling system and its
Control method.
Background technology
As the increasingly depleted of fossil energy and environmental protection increasingly receive the attention of people, electric vehicle is good with its
Good energy substitution characteristic and environmental protection characteristic and be concerned, and not yet obtain the situation of important breakthrough in power battery technology
Under, plug-in hybrid electric vehicle again due to having both " zero-emission " characteristic of pure electric automobile and the driving of hybrid vehicle simultaneously
Mileage advantage and as the important research direction of property energy automobile instantly.
Since plug-in hybrid-power automobile has increased the parts such as power battery, driving motor, electric machine controller newly, and make
With motor compressor instead of the mechanical compressor of traditional vehicle, therefore the cooling system of plug-in hybrid-power automobile is weighed
New design, the control method of cooling system are also increasingly complex compared to traditional vehicle.Current document and patent are for hybrid power
The research of the cooling system of automobile focuses primarily upon the design and drive system of cooling circuit（Driving motor and its controller
Deng）Cooling control, but for how preferably to be cooled down and how to be dropped by improving control method to power battery
Shortage is then compared in the research of the power consumption of low cooling system etc..
Since power battery has operating temperature very harsh requirement（Ideal working temperature is about 20 DEG C ~ 30
℃）, need to cool down it to reduce the temperature of coolant by compressor of air conditioner, therefore cooling system consumption is suitable
A part of electricity is the cooling for power battery.Plug-in hybrid-power automobile is compared also to exist with the important difference of traditional vehicle
In：Vehicle charges, and vehicle is carrying out charging operations（Especially DC charging）When, battery can generate amount of heat,
To ensure the service life of charge efficiency and power battery, it is also required to cool down battery at this time.Cooling system it is another
The important power consuming portions of important component --- cooling fan --- and cooling system, further to reduce cooling wind
The power consumption of fan can introduce PWM control methods.
The present invention controls the different cooling requirements of parts each under different operating modes by rational cooling system
Method under the premise of the cooling requirement for meeting power battery, driving motor, electric machine controller, gearbox, significantly reduces cooling
The power consumption of system can extend vehicle continual mileage so as to achieve the purpose that not only to ensure cooling requirement.
Invention content
The technical problem to be solved in the present invention is to provide a kind of control method of the cooling system of hybrid vehicle, especially
Suitable for plug-in hybrid-power automobile, meet the cooling requirement under different operating modes, while reduce the power consumption of cooling system.
The control method of the cooling system of hybrid vehicle of the present invention, the cooling system include being provided with
The power electronics case of first water pump/electricity drives gearbox cooling subsystem, and coolant flows through first water pump, and flows through the electricity
Power electronic box and the electricity drive gearbox, when 1）The temperature T of the power electronics casePEBMore than the first temperature threshold T1 or 2）
The electricity drives the temperature T of gearboxEDUMore than second temperature threshold value T2 or 3）The coolant of the inlet of the power electronics case
Temperature TPEBCoolantDuring more than third temperature threshold T3, first water pump is opened.
In above-mentioned control method, optionally, after first water pump unlatching, when 1）The temperature of the power electronics case
TPEBLess than the first temperature threshold T1-10 and 2）The electricity drives the temperature T of gearboxEDULess than second temperature threshold value T2-10, with
And 3）The temperature T of the coolant of the inlet of the power electronics casePEBCoolantDuring less than third temperature threshold T3-5, described
One water pump is closed.
In above-mentioned control method, optionally, the cooling system includes being provided with electric compressor of air conditioner, the second water pump
Energy storage system cooling subsystem, coolant flows through the electric compressor of air conditioner, and flows through second water pump, when described
The temperature T of the accumulation of energy medium of energy storage systemCellDuring more than the 4th temperature threshold T4, second water pump is opened.
In above-mentioned control method, optionally, after second water pump unlatching, as the temperature T of the accumulation of energy mediumCell
During more than the 4th temperature threshold T4+1, the electricity compressor of air conditioner is opened.
In above-mentioned control method, optionally, after the electric compressor of air conditioner is opened, when the temperature of the accumulation of energy medium
TCellLess than the 4th temperature threshold T4-3 or temperature T when the coolantCoolantDuring less than the 5th temperature threshold T5, the electricity
Air-conditioning is closed.
In above-mentioned control method, optionally, after second water pump unlatching, as the temperature T of the accumulation of energy mediumCell
During less than the 4th temperature threshold T4-5, second water pump is closed.
In above-mentioned control method, optionally, the cooling system includes power electronics case/electricity and drives gearbox cooling subsystem
It unites, be provided with the energy storage system cooling subsystem of electric compressor of air conditioner and fan coolling subsystem, the controlling party
Method includes drive mode and charge mode, when the hybrid vehicle is in DC charging, activates the electric compressor of air conditioner
And use the drive mode.
In above-mentioned control method, optionally, fan speed gear is divided into several shelves, according to the compressor of air conditioner pressure
Power, speed and flow through the power electronics case coolant temperature computation of table lookup described in fan gear speed.
In above-mentioned control method, optionally, the fan is DC fan, and is controlled by mixed movement controller.
In above-mentioned control method, optionally, the hybrid vehicle is suitable for plug-in hybrid-power automobile.
The invention further relates to hybrid vehicle cooling system, drive gearbox cooling including power electronics case/electricity
System, energy storage system cooling subsystem and fan coolling subsystem, the power electronics case/electricity drive gearbox cooling
Subsystem includes coolant storage and the first water pump, and the coolant from the coolant storage passes through first water
Pump returns to the coolant storage after flowing through the power electronics case and the electricity drive gearbox.
The invention further relates to hybrid vehicle cooling system, drive gearbox cooling including power electronics case/electricity
System, energy storage system cooling subsystem and fan coolling subsystem, the energy storage system cooling subsystem include
Electric compressor of air conditioner, cooling evaporator and the second water pump, coolant flow through the electric compressor of air conditioner and the cooling evaporation
Device, the coolant from the cooling evaporator return to after flowing through the power battery for energy stores by second water pump
The cooling evaporator.
The control system of the invention for being specially suitable for hybrid vehicle.A kind of cooling of plug-in hybrid-power automobile is provided
System and its control method can meet vehicle power battery, driving motor, electric machine controller, gearbox in the process of running
Cooling requirement, while also be able to reduce to the maximum extent the power consumption of cooling system, effectively save electric energy reduces discharge, prolongs
The continual mileage of long vehicle.
Through the following detailed description with reference to the accompanying drawings, other aspects and features of the present invention become apparent.But it should know
Road, which is only the purpose design explained, not as the restriction of the scope of the present invention, this is because it should refer to
Appended claims.It should also be noted that attached drawing is merely intended to conceptually illustrate structure and flow described herein, unless in addition
It points out, it is not necessary to scale attached drawing.
Description of the drawings
The detailed description of detailed description below is referred to reference to attached drawing, present invention will become more fully understood, in attached drawing
Same reference numbers refer to same element in view always.Wherein：
Fig. 1 is the structure chart of the cooling system of hybrid vehicle of the present invention；
Fig. 2 is the flow chart of the control method of the cooling system of hybrid vehicle of the present invention.
Specific embodiment
To help those skilled in the art that can definitely understand claimed theme, below in conjunction with the accompanying drawings
Detailed description of the present invention specific embodiment.
Only just there is the demand of cooling when driving in vehicle different from traditional vehicle, plug-in hybrid-power automobile is in charging
There is the demand of cooling；In addition, the parts of plug-in hybrid-power automobile（Especially power battery）Have for operating temperature
More stringent requirement, this proposes higher requirement to the control method of cooling system.The present invention will propose a kind of novel
Method for controlling cooling system improves the working efficiency of cooling system, meets plug-in hybrid-power automobile under different operating modes
Cooling requirement, while reduce the power consumption of cooling system.
The control of this cooling system is as shown in Figure 1, the control system is made of three parts：PEB/EDU coolings control,
ESS coolings control and DC fan control.The specific implementation flow of control method is as shown in Figure 2.
（1）PEB/EDU cooling controls
PEB（Power Electronics Box）For power electronics case, electric machine controller, driver and DC/ are included
DC, EDU（Electric Drive Unit）Gearbox is driven for electricity, includes driving motor and gearbox.The cooling subsystem is by cold
But liquid, coolant circuit, the first cooling water pump are formed.Coolant will successively flow through PEB and EDU, return again to coolant storage.
The control method of the cooling subsystem is as follows：To reduce water pump power consumption, only when PEB, EDU or PEB entrance are cold
But just start the first cooling water pump when the temperature of liquid is higher than certain threshold value, i.e.,：
a. TPEB>T1 or TEDU>T2 or TPEBCoolant>During T3, water pump is opened；
b. TPEB<T1-10 DEG C, and TEDU<T2-10 DEG C, and TPEBCoolant<At T3-5 DEG C, water pump is closed.
（2）ESS cooling controls
ESS（Energy Storage System）For energy storage system, including power battery and its controller.ESS is cold
But control system is made of electric compressor of air conditioner, cooling evaporator, the second cooling water pump and cooling circuit etc..
The control method of the cooling subsystem is as follows：
A. drive mode
If a1. coolant temperature (TCoolant) closed less than T5, electric compressor of air conditioner and cooling evaporator；
If a2. battery core temperature (TCell) higher than T4, then the second water pump is opened, if battery core temperature drops after the second water pump is opened
To T4-5 DEG C, then the second water pump is closed；
If a3. coolant 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 is opened；
A4. if coolant temperature is higher than T5, and（Second water pump is closed or battery core temperature is less than T4-3 DEG C）, then automatically controlled pressure
Contracting machine and cooling evaporator are closed；
B. charge mode
If b1. carrying out AC charging, without cooling；
If b2. carrying out DC charging, cooling control is carried out by the control method of drive mode.
（3）DC fan controls
Cooling fan is the large electricity consumer in cooling system, improves the cooling efficiency of fan and will greatly reduce cooling system
The power consumption of system.To improve the cooling efficiency of fan, the present invention substitutes traditional high and low shelves fan using DC fan.
DC fan is by HCU（Hybrid Control Unit mix movement controller）It is controlled, control method is as follows：
Fan gear is divided into 10 grades, according to the state of compressor of air conditioner（Whether HVACOn, i.e. air-conditioning run）, air-conditioning pressure
Contracting machine pressure（Pressure）, speed（VehicleSpeed）, PEB coolant temperatures（PEBCoolantTemp）Computation of table lookup goes out
The control gear of DC fan.
Wherein, the first temperature threshold T1, second temperature threshold value T2, third temperature threshold T3, the 4th temperature threshold T4, the 5th
Temperature threshold T5 is five independences, without associated temperature threshold, can separate set up in this way, simplify control step, convenient for pipe
Reason.
The control method of the cooling system of plug-in hybrid-power automobile involved in the present invention is mainly by three controls subsystem
System is formed：PEB/EDU coolings control, ESS coolings control and DC fan control.To adapt to the different operating modes of hybrid vehicle,
The operating mode of cooling system is had nothing in common with each other again under charge mode and drive mode, so as to both can guarantee each zero under different operating modes
The cooling requirement of component, and the power consumption of cooling system can be reduced to the maximum extent, save electric energy and reduce discharge.
More than specific embodiment is merely to illustrate the present invention, and not limitation of the present invention, related technical field
Those of ordinary skill without departing from the scope of the invention, can also make a variety of changes and modification, therefore all etc.
Same technical solution also belongs to scope of the invention, and scope of patent protection of the invention should be defined by the claims.
Claims (10)
1. the control method of the cooling system of hybrid vehicle, it is characterized in that：The cooling system includes being provided with first
The power electronics case of water pump/electricity drives gearbox cooling subsystem, and coolant flows through first water pump, and flows through the electric power electricity
Sub- case and the electricity drive gearbox, when 1）The temperature T of the power electronics casePEBMore than the first temperature threshold T1 or 2）The electricity
Drive the temperature T of gearboxEDUMore than second temperature threshold value T2 or 3）The temperature of the coolant of the inlet of the power electronics case
TPEBCoolantDuring more than third temperature threshold T3, first water pump is opened；The cooling system, which further includes, is provided with electric sky
The energy storage system cooling subsystem of compressor, the second water pump is adjusted, coolant flows through the electric compressor of air conditioner, and flows through institute
The second water pump is stated, as the temperature T of the accumulation of energy medium of the energy storage systemCellDuring more than the 4th temperature threshold T4, described
Two water pumps are opened.
2. the control method of the cooling system of hybrid vehicle according to claim 1, it is characterized in that：Described first
After water pump is opened, when 1）The temperature T of the power electronics casePEBLess than the first temperature threshold T1-10oC and 2）The electricity, which drives, to be become
The temperature T of fast caseEDULess than second temperature threshold value T2-10oC and 3）The temperature of the coolant of the inlet of the power electronics case
Spend TPEBCoolantDuring less than third temperature threshold T3-5oC, first water pump is closed.
3. the control method of the cooling system of hybrid vehicle according to claim 1, it is characterized in that：Described second
After water pump is opened, as the temperature T of the accumulation of energy mediumCellDuring more than the 4th temperature threshold T4+1oC, the electricity compressor of air conditioner
It opens.
4. the control method of the cooling system of hybrid vehicle according to claim 3, it is characterized in that：It is empty in the electricity
After compressor is adjusted to open, as the temperature T of the accumulation of energy mediumCellDuring less than the 4th temperature threshold T4-3oC, the electricity air-conditioning pressure
Contracting organ closes.
5. the control method of the cooling system of hybrid vehicle according to claim 1, it is characterized in that：Described second
After water pump is opened, as the temperature T of the accumulation of energy mediumCellDuring less than the 4th temperature threshold T4-5oC, second water pump is closed.
6. the control method of the cooling system of hybrid vehicle according to claim 1, it is characterized in that：The cooling system
System includes fan coolling subsystem, when the hybrid vehicle is in DC charging, activates the electric compressor of air conditioner.
7. the control method of the cooling system of hybrid vehicle according to claim 6, it is characterized in that：By fan speed
Gear is divided into several shelves, according to the electric compressor of air conditioner pressure, speed and the coolant that flows through the power electronics case
The gear speed of fan described in temperature computation of table lookup.
8. the control method of the cooling system of hybrid vehicle according to claim 7, it is characterized in that：The fan is
DC fan, and controlled by mixed movement controller.
9. the control method of the cooling system of the hybrid vehicle according to any one of claim 1-8, feature
It is：The hybrid vehicle is suitable for plug-in hybrid-power automobile.
10. the cooling system of hybrid vehicle, it is characterized in that：Gearbox cooling subsystem, energy are driven including power electronics case/electricity
Storage system cooling subsystem and fan coolling subsystem are measured, the power electronics case/electricity drives gearbox cooling subsystem packet
It includes coolant storage, the first water pump, power electronics case and electricity and drives gearbox, the coolant from the coolant storage is led to
First water pump is crossed, the coolant storage, institute are returned to after flowing through the power electronics case and the electricity drive gearbox
The first water pump structure is stated into when 1）The temperature T of the power electronics casePEBMore than the first temperature threshold T1 or 2）The electricity, which drives, to be become
The temperature T of fast caseEDUMore than second temperature threshold value T2 or 3）The temperature of the coolant of the inlet of the power electronics case
TPEBCoolantDuring more than third temperature threshold T3, first water pump is opened；The energy storage system cooling subsystem includes
Electric compressor of air conditioner, cooling evaporator and the second water pump, coolant flow through the electric compressor of air conditioner and the cooling evaporator,
Coolant from the cooling evaporator returns to institute after flowing through the power battery for energy stores by second water pump
State cooling evaporator, second water pump structure is into the temperature T of the accumulation of energy medium when the energy storage systemCellMore than the 4th
During temperature threshold T4, second water pump is opened.
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| CN201310614223.2A CN104670000B (en) | 2013-11-28 | 2013-11-28 | The cooling system and its control method of hybrid vehicle |
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| CN104670000B true CN104670000B (en) | 2018-06-19 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106482960A (en) * | 2015-08-27 | 2017-03-08 | 上海汽车集团股份有限公司 | The flow resistance test system of power electronics case and method |
| CN109398061B (en) * | 2018-12-19 | 2020-09-01 | 海马汽车有限公司 | Hybrid electric vehicle thermal management system and control method and hybrid electric 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 |
| CN113568395A (en) * | 2021-07-19 | 2021-10-29 | 武汉理工大学 | Temperature control method and module for new-energy commercial vehicle cooling system |
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|---|---|---|---|---|
| CN101596856A (en) * | 2009-07-03 | 2009-12-09 | 奇瑞汽车股份有限公司 | A kind of method for controlling cooling system of electric automobile |
| CN201914075U (en) * | 2010-12-20 | 2011-08-03 | 浙江吉利汽车研究院有限公司 | Cooling system of hybrid electric vehicle |
| CN102862473A (en) * | 2011-07-06 | 2013-01-09 | 上海汽车集团股份有限公司 | Method for controlling rotary speed of cooling fan of vehicle and hybrid car |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2830926B1 (en) * | 2001-10-12 | 2004-04-02 | Peugeot Citroen Automobiles Sa | THERMAL REGULATION DEVICE FOR MOTOR VEHICLES, IN PARTICULAR OF THE ELECTRIC OR HYBRID TYPE |
| JP4089428B2 (en) * | 2002-12-26 | 2008-05-28 | 株式会社デンソー | Air-cooled heat exchanger |
| JP5788774B2 (en) * | 2011-11-21 | 2015-10-07 | 日立オートモティブシステムズ株式会社 | Cooling system |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101596856A (en) * | 2009-07-03 | 2009-12-09 | 奇瑞汽车股份有限公司 | A kind of method for controlling cooling system of electric automobile |
| CN201914075U (en) * | 2010-12-20 | 2011-08-03 | 浙江吉利汽车研究院有限公司 | Cooling system of hybrid electric vehicle |
| CN102862473A (en) * | 2011-07-06 | 2013-01-09 | 上海汽车集团股份有限公司 | Method for controlling rotary speed of cooling fan of vehicle and hybrid car |
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