CN107499176A - The cooling means and device of vehicle power drive system - Google Patents

The cooling means and device of vehicle power drive system Download PDF

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Publication number
CN107499176A
CN107499176A CN201710313485.3A CN201710313485A CN107499176A CN 107499176 A CN107499176 A CN 107499176A CN 201710313485 A CN201710313485 A CN 201710313485A CN 107499176 A CN107499176 A CN 107499176A
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motor
cooling
temperature
cooling requirement
power
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CN201710313485.3A
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CN107499176B (en
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高宝泉
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Borgward Automotive China Co Ltd
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Borgward Automotive China Co Ltd
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    • 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
    • B60L15/00—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K11/00—Arrangement in connection with cooling of propulsion units
    • B60K11/02—Arrangement in connection with cooling of propulsion units with liquid cooling
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K9/00—Arrangements for cooling or ventilating
    • 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
    • B60L2240/36—Temperature of vehicle components or parts
    • 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
    • B60L2240/42—Drive Train control parameters related to electric machines
    • B60L2240/425—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
    • B60L2260/00—Operating Modes
    • B60L2260/40—Control modes
    • B60L2260/44—Control modes by parameter estimation
    • 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
    • Y02T10/64—Electric machine technologies in electromobility

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)

Abstract

This disclosure relates to a kind of cooling means and device of vehicle power drive system, this method include：The prediction cooling requirement amount of cooling system is obtained according to the heating power of power drive system；The real-time cooling demand of cooling system is obtained further according to the system temperature of power drive system；The control parameter of cooling system is determined according to prediction cooling requirement amount and real-time cooling demand.Cooling system control strategy is determined by combining prediction cooling requirement amount and cooling down demand in real time, corresponding cooling capacity can be distributed in time according to actual cooling requirement, the problem of reducing system energy consumption, and avoid control lag.

Description

The cooling means and device of vehicle power drive system
Technical field
This disclosure relates to technical field of vehicle, more particularly to a kind of cooling means and device of vehicle power drive system.
Background technology
As the motor of the traction power main source of pure electric vehicle, its cooling performance to the dynamic property of vehicle, Economy and driving influence great.Mainly have two for the method for pure electric vehicle power drive system cooling in the prior art Kind：All the period of time maximum capacity cooling means and the dynamic regulation cooling energy based on monitoring driving motor temperature and calculating power of motor The real-time cooling means of power.The former mode is simple and easy, cold using all the period of time maximum capacity typically in commercial pure electric vehicle But method, although having some superiority in terms of integrated vehicle control tactics complexity and manufacturing cost, the energy is caused compared with Big waste, increasingly advocating energy-saving and emission-reduction instantly, be worthless.And the mode of the latter is due to the temperature of power drive system Change has hysteresis quality compared to thermal source (power drive system heating power), i.e. the heat of power drive system accumulation subtracts in driving current It will not be disappeared immediately after small or vanishing, heat, which dissipates, needs certain time, therefore is become by the real-time collecting temperature of sensor Change carries out dynamic regulation again and has obvious control lag.
The content of the invention
The purpose of the disclosure is to provide a kind of cooling means and device of vehicle power drive system, to solve existing cooling The problem of energy waste existing for method and hysteresis quality.
According to the first aspect of the embodiment of the present disclosure, there is provided a kind of cooling means of vehicle power drive system, methods described Including：
The prediction cooling requirement amount of cooling system is obtained according to the heating power of the power drive system；
The real-time cooling demand of the cooling system is obtained according to the system temperature of the power drive system；
The control parameter of the cooling system is determined according to the prediction cooling requirement amount and the demand of cooling in real time.
Optionally, in the prediction cooling requirement amount that cooling system is obtained according to the heating power of the power drive system Before, methods described also includes：
Obtain the heating power of the power drive system, the system temperature of the power drive system and the cooling system Coolant temperature；
Wherein, the heating power of the power drive system includes the motor heating power of the power drive system；Institute Stating the system temperature of power drive system includes the current environmental temperature of the power drive system, the driving electricity of the power drive system Machine body temperature and drive motor controller temperature；The coolant temperature of the cooling system, including the cooling of preceding motor Circuit entrance temperature and rear motor cooling circuit inlet temperature.
Optionally, the prediction cooling requirement amount that cooling system is obtained according to the heating power of the power drive system, Including：
According to the preceding motor cooling circuit inlet temperature and it is described after motor cooling circuit inlet temperature, really Determine coolant cooling requirement percentage；
According to the motor heating power, the motor body temperature and the drive motor controller temperature Degree, determines motor cooling requirement percentage, the motor heating power include preceding driving the motor feels hot power and after Motor heating power, the motor body temperature include preceding driving motor body temperature and rear driving motor body temperature Degree, the drive motor controller temperature includes preceding drive motor controller temperature and rear drive motor controller temperature, described Motor cooling requirement percentage includes preceding motor cooling requirement percentage and rear motor cooling requirement percentage；
The coolant cooling requirement percentage and the motor cooling requirement percentage are defined as the prediction Cooling requirement amount.
Optionally, it is described according to the preceding motor cooling circuit inlet temperature and it is described after motor cooling circuit Inlet temperature, coolant cooling requirement percentage is determined, including：
Using the corresponding relation of default environment temperature and coolant temperature, obtain and cooled down under the current environmental temperature Liquid needs the optimum temperature kept；
Select in the preceding motor cooling circuit inlet temperature and the rear motor cooling circuit inlet temperature Maximum；
The difference of the optimum temperature and the maximum is obtained, the control targe increment as coolant cooling requirement Value；
Entered according to the metric of the control targe increment size and the cooling tolerance of the drive system pre-set Row normalized, obtain the coolant cooling requirement percentage.
Optionally, it is described according to the motor heating power, the motor body temperature and the driving Electric machine controller temperature, motor cooling requirement percentage is determined, including：
Processing is filtered to the motor heating power, the filtering process includes first-order filtering and gradient is filtered Ripple；
Integral Processing in preset period of time is carried out to the motor heating power after filtering process, obtained described Aggregate-value is assessed in motor thermal losses in preset period of time；
Motor thermal losses assessment aggregate-value is converted into driving in the preset period of time using preset algorithm Motor thermal losses value；
According to the motor thermal losses value, the motor body temperature and the electric drive motor controller Temperature, determine the motor cooling requirement percentage；
Wherein, the motor electric current is the motor feels hot the power of driving before described, and the motor body temperature is Driving motor body temperature before described, when the drive motor controller temperature is the preceding drive motor controller temperature, institute It is the preceding motor cooling requirement percentage to state motor cooling requirement percentage；The motor electric current is described Driving the motor feels hot power afterwards, the motor body temperature are driving motor body temperature after described, the motor When controller temperature is the rear drive motor controller temperature, the motor cooling requirement percentage is the rear driving Motor cooling requirement percentage.
Optionally, the real-time cooling requirement that the cooling system is obtained according to the system temperature of the power drive system Amount, including：
To the preceding driving motor body temperature, the rear driving motor body temperature, the preceding drive motor controller Temperature and the rear drive motor controller temperature are filtered processing, obtain Current Temperatures；
The temperature range residing for the Current Temperatures is determined, the temperature range includes basic control zone, ratio control zone Or limit control zone, wherein the temperature range of the ratio control zone is higher than the basic control zone, the limit control zone Temperature range is higher than the ratio control zone；
The cooling system control strategy according to corresponding to obtaining the temperature range, the cooling system control strategy include： The parameter setting of the aperture of three valve opening of rotation speed of the fan, pump rotary speed and the cooling circuit；
The real-time cooling demand of the cooling system is determined according to the cooling system control strategy.
Optionally, it is described that the cooling system is determined according to the prediction cooling requirement amount and the demand of cooling in real time Control parameter, including：
By carrying out coupling to the prediction cooling requirement amount and the demand of cooling in real time and obtaining the cooling system Control parameter；
Wherein, coupled modes include：Choose maximum, weighted average or the selection maximum and the weighted average With reference to mode.
According to the second aspect of the embodiment of the present disclosure, there is provided a kind of cooling device of vehicle power drive system, described device Including：
Cooling requirement amount acquisition module is predicted, for obtaining cooling system according to the heating power of the power drive system Predict cooling requirement amount；
Cooling demand acquisition module in real time, for obtaining the cooling system according to the system temperature of the power drive system The real-time cooling demand of system；
Control parameter determining module, for determining institute according to the prediction cooling requirement amount and the demand of cooling in real time State the control parameter of cooling system.
Optionally, described device also includes：
Parameter acquisition module, in the prediction that cooling system is obtained according to the heating power of the power drive system Before cooling requirement amount, the heating power of the power drive system, the system temperature of the power drive system and described cold are obtained But the coolant temperature of system；
Wherein, the heating power of the power drive system includes the motor heating power of the power drive system；Institute Stating the system temperature of power drive system includes the current environmental temperature of the power drive system, the driving electricity of the power drive system Machine body temperature and drive motor controller temperature；The coolant temperature of the cooling system, including the cooling of preceding motor Circuit entrance temperature and rear motor cooling circuit inlet temperature.
Optionally, the prediction cooling requirement amount acquisition module, including：
Coolant demand determination sub-module, for according to the preceding motor cooling circuit inlet temperature and the rear-guard Dynamic motor cooling circuit inlet temperature, determines coolant cooling requirement percentage；
Motor cooling requirement determination sub-module, for according to the motor heating power, the motor Body temperature and the drive motor controller temperature, determine motor cooling requirement percentage, the motor hair Thermal power includes preceding driving the motor feels hot power and rear driving the motor feels hot power, and the motor body temperature includes forerunner Dynamic motor body temperature and rear driving motor body temperature, the drive motor controller temperature include preceding drive motor controller Temperature and rear drive motor controller temperature, the motor cooling requirement percentage include preceding motor cooling requirement hundred Point than with rear motor cooling requirement percentage；
Precooling demand determination sub-module, for the coolant cooling requirement percentage and the motor to be cooled down Demand percentage is defined as the prediction cooling requirement amount.
Optionally, the coolant demand determination sub-module, including：
Optimum temperature acquisition submodule, for the corresponding relation using default environment temperature and coolant temperature, obtain Coolant needs the optimum temperature kept under the current environmental temperature；
Temperature maximum selects submodule, for selecting the preceding motor cooling circuit inlet temperature and the rear-guard Maximum in dynamic motor cooling circuit inlet temperature；
Difference acquisition submodule, for obtaining the difference of the optimum temperature and the maximum, cooled down as coolant The control targe increment size of demand；
Normalized submodule, for according to the control targe increment size and the power drive system pre-set The metric of cooling tolerance be normalized, obtain the coolant cooling requirement percentage.
Optionally, the motor cooling requirement determination sub-module, including：
Heating power calculates and filtering process submodule, for being filtered processing to the motor heating power, The filtering process includes first-order filtering and gradient filtering；
Integral Processing submodule, for being carried out to the motor heating power after filtering process in preset period of time Aggregate-value is assessed in Integral Processing, the motor thermal losses obtained in the preset period of time；
Thermal losses value calculating sub module, for the motor thermal losses to be assessed into aggregate-value conversion using preset algorithm For the motor thermal losses value in the preset period of time；
Cooling requirement determination sub-module, for according to the motor thermal losses value, the motor body temperature And the drive motor controller temperature, determine the motor cooling requirement percentage；
Wherein, the motor electric current is the motor feels hot the power of driving before described, and the motor body temperature is Driving motor body temperature before described, when the drive motor controller temperature is the preceding drive motor controller temperature, institute It is the preceding motor cooling requirement percentage to state motor cooling requirement percentage；The motor electric current is described Driving the motor feels hot power afterwards, the motor body temperature are driving motor body temperature after described, the motor When controller temperature is the rear drive motor controller temperature, the motor cooling requirement percentage is the rear driving Motor cooling requirement percentage.
Optionally, the cooling demand acquisition module in real time, including：
Current Temperatures acquisition submodule, for the preceding driving motor body temperature, the rear driving motor body temperature Degree, the preceding drive motor controller temperature and the rear drive motor controller temperature are filtered processing, obtain current Temperature；
Temperature range determination sub-module, for determining the temperature range residing for the Current Temperatures, the temperature range bag Basic control zone, ratio control zone or limit control zone are included, wherein the temperature range of the ratio control zone is basic higher than described Control zone, the temperature range of the limit control zone are higher than the ratio control zone；
Control strategy acquisition submodule, for cooling system control strategy, institute according to corresponding to temperature range acquisition Stating cooling system control strategy includes：The parameter of the aperture of three valve opening of rotation speed of the fan, pump rotary speed and the cooling circuit Set；
Real-time cooling requirement determination sub-module, for determining the cooling system according to the cooling system control strategy Cooling demand in real time.
Optionally, the control parameter determining module, is used for：
By carrying out coupling to the prediction cooling requirement amount and the demand of cooling in real time and obtaining the cooling system Control parameter；
Wherein, coupled modes include：Choose maximum, weighted average or the selection maximum and the weighted average With reference to mode.
The cooling means and device for the vehicle power drive system that the disclosure provides, pass through the hair according to the power drive system Thermal power obtains the prediction cooling requirement amount of cooling system；The cooling system is obtained according to the system temperature of the power drive system The real-time cooling demand of system；The cooling system is determined according to the prediction cooling requirement amount and the demand of cooling in real time Control parameter.The disclosure is predicted by the heating power of power drive system to the cooling requirement amount of cooling system, simultaneously The system temperature of monitoring power drive system obtains the real-time cooling demand of cooling system in real time, is combined by the two to determine The control strategy of cooling system, corresponding cooling capacity can be distributed according to the cooling requirement of reality, reduce system energy consumption, and And the problem of avoiding control lag.
Other feature and advantage of the disclosure will be described in detail in subsequent specific embodiment part.
Brief description of the drawings
Accompanying drawing is for providing further understanding of the disclosure, and a part for constitution instruction, with following tool Body embodiment is used to explain the disclosure together, but does not form the limitation to the disclosure.In the accompanying drawings：
Fig. 1 is a kind of flow chart of the cooling means of vehicle power drive system according to an exemplary embodiment；
Fig. 2 is the flow chart of the cooling means of another vehicle power drive system according to an exemplary embodiment；
Fig. 3 is the structural representation of the cooling system of electric vehicle；
Fig. 4 is a kind of flow chart of the cooling means of vehicle power drive system according to an exemplary embodiment；
Fig. 5 is a kind of flow chart of the cooling means of vehicle power drive system according to an exemplary embodiment；
Fig. 6 is a kind of flow chart of the cooling means of vehicle power drive system according to an exemplary embodiment；
Fig. 7 is a kind of block diagram of the cooling device of vehicle power drive system according to an exemplary embodiment；
Fig. 8 is the block diagram of the cooling device of another vehicle power drive system according to an exemplary embodiment；
Fig. 9 is a kind of block diagram of prediction cooling requirement amount acquisition module according to an exemplary embodiment；
Figure 10 is a kind of block diagram of coolant demand determination sub-module according to an exemplary embodiment；
Figure 11 is a kind of block diagram of motor cooling requirement determination sub-module according to an exemplary embodiment；
Figure 12 is a kind of block diagram of demand acquisition module of cooling in real time according to an exemplary embodiment.
Description of reference numerals
301：Three valve opening
302：Preceding driving electric system
3021：Preceding motor
3022：Preceding drive motor controller
303：After drive electric system
3031：Motor afterwards
3032：Drive motor controller afterwards
304：Water pump
305：Cooling water radiator
306：Fan
307：Cooling circuit expansion kettle
3081：Environment temperature sensor
3082：Preceding motor cooling circuit inlet temperature sensor
3083：Motor cooling circuit inlet temperature sensor afterwards
Embodiment
The embodiment of the disclosure is described in detail below in conjunction with accompanying drawing.It should be appreciated that this place is retouched The embodiment stated is merely to illustrate and explained the disclosure, is not limited to the disclosure.
Before introducing the disclosure and cooling means and the device of vehicle power drive system be provided, first pair this disclosure relates to Application scenarios are introduced, and the power drive system of usual vehicle includes motor and cooling system, and motor includes driving Motor body and its controller, cooling system generally include cooling circuit, radiator, water pump and fan equipped with coolant Deng.The change of motor heating power will not cause the temperature change of motor and coolant at once, for example, working as vehicle When stopping after high-speed cruising or switching to the low speed to run, because the heat of power drive system accumulation is in motor power vanishing Or will not also be disappeared at once when smaller, heat dissipates or system thermal reaches balance and needs the regular hour again, the balance Required time length then depend on to current system cooling capacity control size, though control it is excessive can effectively reduce cooling or Equilibration time, but energy waste can be caused；Phase revertive control is too small, can dramatically increase system cool time.Because electric drive The basic reason of system (including motor, drive motor controller and its coolant) temperature change is each parts heat Accumulation and the result accumulated in time of dissipative velocity, therefore the temperature change of power drive system is compared to thermal source (electricity in itself Drive system heating power) there is hysteresis quality.And if the higher of threshold value setting is opened in the control of cooling system, also exist of short duration Temperature overshot phenomenon, and if the hysteresis effect will not be also obviously improved using closed-loop control, at the same time closed-loop control The concussion time can also increase the complexity of control algolithm.
Also, cooling capacity now, which is assessed, to depend on the heating power calculated by electric machine phase current to prejudge, Therefore need to combine the real-time cooling control method based on temperature acquisition to make up the deficiency of prediction cooling.
In addition, refer to one is mentioned that, there are some to predict vehicle with reference to map datum, traveling road conditions and vehicle situation and drive The cooling means of the complex control of operating mode is sailed, it speculates mainly for traditional oil-engine driven vehicle according to terrain data Road conditions and then pre-control vehicle cooling system, but this method has certain limitation：Identical road can be because of difference The driving habit of driver and have different degrees of requirement to cooling system, to a certain extent can using same cooling control Influence the good performance of the power performance of vehicle.
Based on above-mentioned consideration, the disclosure provide it is a kind of for pure electric vehicle motor cooling control predict, in real time mutually tie The cooling control method of conjunction, the problem of can solve the problem that energy waste existing for existing cooling means and hysteresis quality.
Fig. 1 is a kind of flow chart of the cooling means of vehicle power drive system according to an exemplary embodiment, such as Shown in Fig. 1, this method may comprise steps of：
Step 110, the prediction cooling requirement amount of cooling system is obtained according to the heating power of power drive system.
Wherein, the heating power of power drive system includes the motor heating power of the power drive system, mainly with this Operating current, voltage, rotating speed and the moment of torsion of motor are calculation basis, and the heating power is used to predict motor in future Make the ramp case of drive system in some period, and the control of the coolant temperature of cooling system is calculated according to this ramp case Demand processed, the demand for control of the coolant temperature may finally be exported in the form of percentage, i.e. the prediction cooling requirement amount.Separately Outside, because the heat dispersion and the temperature of environment temperature and coolant of motor have compared with Important Relations, therefore driven according to electricity The heating power of dynamic system can be combined with the current environment of power drive system when obtaining the prediction cooling requirement amount of cooling system The coolant temperature of temperature and cooling system, wherein ECL are in the cooling circuit of cooling system.
Step 120, the real-time cooling demand of cooling system is obtained according to the system temperature of power drive system.
Wherein, the system temperature of the power drive system includes the current environmental temperature of the power drive system, the electric drive trains The motor body temperature and drive motor controller temperature of system, driving electricity before generally motor can include Machine and rear motor, therefore above-mentioned motor heating power includes preceding driving the motor feels hot power and rear motor is sent out Thermal power, motor body temperature include preceding driving motor body temperature and rear driving motor body temperature, motor control Device temperature processed includes preceding drive motor controller temperature and rear drive motor controller temperature, the coolant temperature of the cooling system Including preceding motor cooling circuit inlet temperature and rear motor cooling circuit inlet temperature.
In addition, it is the supplement to predicting cooling requirement amount to obtain cooling demand in real time, particularly in two following situations Under：The first situation is the current environmental temperature higher starting stage；Second case is the low speed after highly travelling for a long time Stage or idling stage.Under both situations above, although the driving heating power of motor and little, still need to hold Continuous higher radiating or cooling requirement, now can by coolant temperature and the situation of motor body temperature come The heat-sinking capability of the cooling circuit of whole motor system is adjusted in real time.
It should be noted that above-mentioned steps 110 and step 120 can be carried out synchronously, you can with simultaneously to cooling system System is predicted the analysis of cooling requirement and real-time cooling requirement, so as to be attached to two steps in step 130 below The cooling requirement amount obtained in rapid.
Step 130, according to prediction cooling requirement amount and in real time, cooling demand determines the control parameter of cooling system.
Illustratively, the step is by carrying out coupling to prediction cooling requirement amount and real-time cooling demand and obtaining cooling system The control parameter of system.
Wherein, coupled modes include：Choose maximum, weighted average or choose the side that maximum and weighted average combine Formula.
Step 110 and step 120 are entered after prediction cooling requirement amount and in real time cooling demand are determined respectively to the two Row coupling is so that it is determined that the control parameter of cooling system, it can be seen that the control parameter is cooled down based on precooling ability and reality Power drive system cooling requirement is determined under the combination of demand, and combines and monitors that the real-time cooling requirement of power drive system obtains Control parameter, therefore be not only able to effectively ensure the driving force of motor, all the period of time avoids motor due to overheat And the phenomenon of the drop power occurred, additionally it is possible to timely provided by power drive system in cooling procedure and matched with its cooling requirement Cooling capacity, can avoid due to cooling capacity output excessively cause energy waste, can also avoid cooling capacity export not Influence of the foot to power drive system.
Illustratively, when carrying out the coupling of step 130, the gradient constraint of control parameter can also be added, is mainly used in controlling The execution action of cooling device processed it is not smooth, gradient constraint on the one hand can be realized as control parameter control fineness can Modulability；On the other hand it is adapted to the demand for control of cooling device.For example some cooling water pumps 204 require the minimum of controlled quentity controlled variable Change step is 5%.
In summary, the cooling means for the vehicle power drive system that the disclosure provides, passes through the hair according to power drive system Thermal power obtains the prediction cooling requirement amount of cooling system；The reality of cooling system is obtained further according to the system temperature of power drive system When cooling requirement amount；The control parameter of cooling system is determined according to prediction cooling requirement amount and real-time cooling demand.Due to driving The heat dispersion and the temperature of environment temperature and coolant of dynamic motor have compared with Important Relations, and the caloric value of motor is usual It is related to motor heating power consumption, therefore the disclosure passes through the temperature of the amount of combination motor, environment temperature and coolant Spend and the radiating requirements of whole cooling circuit are predicted, while the temperature of monitoring driving motor and controller obtains in real time Cooling demand in real time, combined by the two and determine the control strategy of cooling system, can according to the cooling requirement of reality come The problem of cooling capacity corresponding to distribution, reducing system energy consumption, and avoiding control lag.
Fig. 2 is the flow chart of the cooling means of another vehicle power drive system according to an exemplary embodiment, As shown in Fig. 2 before Fig. 1 embodiment step, it is further comprising the steps of：
Step 140, the cooling of the heating power of power drive system, the system temperature of power drive system and cooling system is obtained Liquid temperature degree.
Wherein, the heating power of power drive system includes the motor heating power of power drive system；Power drive system System temperature include the current environmental temperature of power drive system, the motor body temperature and driving electricity of power drive system Machine controller temperature；The coolant temperature of cooling system, including preceding motor cooling circuit inlet temperature and rear motor Cooling circuit inlet temperature.
Illustratively, the cooling circuit included by the picking systems of the power drive system of typical electric vehicle as shown in figure 3, Wherein three valve opening 301 be for adjusting coolant rate ratio in cooling system, and cooling device, including：Water pump 304, Fan 306 and cooling circuit expansion kettle 307, all it is by VCU (English：Vehicle Control Unit, Chinese：Vehicle control Unit processed) pass through LIN (English：Local Interconnect Network, Chinese：Local interconnect network) communication bus is direct It is controlled, to realize the cooling of power drive system.306 turns of aperture, the rotating speed of water pump 304 and the fan of three valve opening 301 Speed is the cooling system parameter to be controlled, and passes through the rotating speed of the aperture of three valve opening 301, the rotating speed of water pump 304 and fan 306 Reasonable adjusting so as to adjust the overall cooling capacity of power drive system, reach the mesh of the timely and effective cooling to power drive system 's.
Wherein, the current environmental temperature of the power drive system of vehicle is gathered by environment temperature sensor 3081, and is led to Cross CAN (English：Controller Area Network, Chinese：Controller local area network) temperature data that will collect of bus It is transferred to VCU.Coolant temperature includes preceding motor cooling circuit inlet temperature and rear motor cooling circuit entrance temperature Degree, and preceding motor cooling circuit inlet temperature sensor 3082 and rear motor cooling circuit inlet temperature sensor 3083 can be used for gathering coolant temperature, and utilize LIN bus transfers to VCU.The motor heating power of power drive system Calculating data (electric current, voltage, rotating speed and moment of torsion), motor body temperature and drive motor controller temperature can pass through Preceding driving electric system 302 and rear driving electric system 303 gather, and are transferred to the data collected by CAN VCU.Preceding driving electric system 302 includes preceding motor 3021 and preceding drive motor controller 3022, corresponding, rear driving electricity Machine system 303 includes preceding motor 3031 and rear drive motor controller 3032.In some cooling systems, preceding motor Cooling circuit inlet temperature sensor 3082 and rear motor cooling circuit inlet temperature sensor 3083 are collected cold But liquid temperature degree can gather acquisition by preceding driving electric system 302 and rear driving electric system 303, and then may be used in some cooling systems Directly to be obtained by VCU.
Based on the cooling circuit shown in Fig. 3, being obtained according to the heating power of power drive system described in above-mentioned steps 110 is cold But the step of prediction cooling requirement amount of system can include：According to above-mentioned current environmental temperature, coolant temperature, driving electricity Machine heating power, motor body temperature and drive motor controller temperature, obtain the prediction cooling requirement of cooling system Amount.
Specifically, prediction cooling requirement amount be by by preceding motor cooling circuit inlet temperature sensor 3082 and after The coolant temperature that motor cooling circuit inlet temperature sensor 3083 obtains, and with reference to by environment temperature sensor 3081 current environmental temperatures got, then coolant cooling requirement percentage is obtained by way of tabling look-up and calculating, and The cooling requirement percentage that preceding driving electric system 302 and rear driving electric system 303 are calculated by assessing obtains motor Cooling requirement percentage is formed.The calculation process of the prediction cooling requirement amount can be as shown in Figure 4, Figure 5.
The real-time cooling requirement that cooling system is obtained according to the system temperature of power drive system described in above-mentioned steps 120 Amount, it is the real-time cooling demand that cooling system is obtained according to motor body temperature and drive motor controller temperature, The calculation process of the real-time cooling demand can be as shown in Figure 6.
Illustratively, Fig. 4 is a kind of stream of the cooling means of vehicle power drive system according to an exemplary embodiment Cheng Tu, as shown in figure 4, the prediction that cooling system is obtained according to the heating power of power drive system described in step 110 in Fig. 1 Cooling requirement amount, comprises the following steps：
Step 111, according to preceding motor cooling circuit inlet temperature and rear motor cooling circuit inlet temperature, really Determine coolant cooling requirement percentage.
Example, the step can include：First, using the corresponding relation of default environment temperature and coolant temperature, Obtain the optimum temperature that the coolant under current environmental temperature needs to keep；Secondly, motor cooling circuit entrance before selection Maximum in temperature and rear motor cooling circuit inlet temperature；Again, the difference of optimum temperature and maximum is obtained, is made For the control targe increment size of coolant cooling requirement；Finally, according to control targe increment size and the electric drive trains pre-set The metric of the cooling tolerance of system is normalized, and obtains coolant cooling requirement percentage.The wherein electric drive trains The metric of the cooling tolerance of system is to calculate to obtain, it is necessary in view of power drive system by empirical data and experimental data Cooling action corresponding time, the cooling performance of cooling circuit and the energy consumption index of power drive system, the smaller system of tolerance angle value, Response is then sensitiveer, also implies that system acting is about frequent, energy consumption is bigger.
Step 112, according to motor heating power, motor body temperature and drive motor controller temperature, Determine motor cooling requirement percentage.Motor heating power includes preceding driving the motor feels hot power and rear motor Heating power, motor body temperature include preceding driving motor body temperature and rear driving motor body temperature, motor Controller temperature includes preceding drive motor controller temperature and rear drive motor controller temperature, motor cooling requirement percentage Than including preceding motor cooling requirement percentage and rear motor cooling requirement percentage.
Motor heating power as described in step 140 calculates data (electric current, voltage, rotating speed and moment of torsion), driving Motor body temperature and drive motor controller temperature are that preceding driving electric system 302 and rear driving electric system 303 pass through CAN is transferred to VCU, how to pass through motor heating power, motor body temperature and drive motor controller Temperature determines the calculating process of preceding motor cooling requirement percentage and rear motor cooling requirement percentage, referring to following Fig. 5 embodiment.
It should be noted is that step 111 and step 112 can be carried out synchronously, that is, can obtain same Coolant demand percentage and motor cooling requirement percentage under time, in conjunction with the two progress step 113, to determine Predict cooling requirement amount.
Step 113, coolant cooling requirement percentage and motor cooling requirement percentage are defined as prediction cooling Demand.
Illustratively, Fig. 5 is a kind of stream of the cooling means of vehicle power drive system according to an exemplary embodiment Cheng Tu, as shown in figure 5, described in step 112 in Fig. 4 according to motor heating power, motor body temperature and Drive motor controller temperature, motor cooling requirement percentage is determined, is comprised the following steps：
Step 1121, processing is filtered to motor heating power, the filtering process includes first-order filtering and gradient Filtering.
Step 1122, the Integral Processing in preset period of time is carried out to the motor heating power after filtering process, obtained Aggregate-value is assessed in motor thermal losses in preset period of time.
Step 1123, motor thermal losses assessment aggregate-value is converted to the drive in preset period of time using preset algorithm Dynamic motor thermal losses value.
Step 1124, according to motor thermal losses value, motor body temperature and the drive motor controller temperature Degree, determines motor cooling requirement percentage.
Wherein, motor heating power is preceding driving the motor feels hot power, and motor body temperature is preceding driving electricity Machine body temperature, when drive motor controller temperature is preceding drive motor controller temperature, motor cooling requirement percentage For preceding motor cooling requirement percentage.Motor heating power be after driving the motor feels hot power, motor body Temperature drives motor body temperature, when drive motor controller temperature is rear drive motor controller temperature, motor after being Cooling requirement percentage is rear motor cooling requirement percentage.
Illustratively, input voltage, input current, output speed and the output torque of electric system are driven before getting, Before calculating after the equivalent heating power of driving electric system, the heating power first passes around non-negative value processing, and using step First-order filtering and gradient filtering described in rapid 1121 are handled it, it is contemplated that the change of electric machine controller input current amplitude Frequent characteristic and the motor feels hot power are by the waste heat effect of heat power consumption during high step-down, the equivalent heating work(of motor of non-negative value processing Rate value should be handled after filtering, be handled using first-order filtering and gradient filtering, and gradient filtering only carries out negative gradient filtering. Step 1122 is carried out afterwards, and to preceding driving, the motor feels hot that purpose that power integrated is to obtain forerunner in some period Aggregate-value is assessed in the thermal losses of dynamic motor.And the accumulated value can obtain the heat of preceding motor in special time period by conversion Assessed value, that is, step 1123 is lost, wherein the conversion coefficient that preceding motor thermal losses aggregate-value is changed to thermal losses can Determined by the method for experimental calibration.Finally in step 1124, motor thermal losses value and preceding driving that step 1123 obtains Motor body temperature is last by tabling look-up and calculating (list data can be demarcated by calibration experiment and obtained) together as input Motor cooling requirement percentage before obtaining.It is similar, driven after use the input voltage of electric system, input current, When the heating power that output speed and output torque calculate and rear driving motor body temperature, it can be obtained by said process Motor cooling requirement percentage afterwards.
Illustratively, Fig. 6 is a kind of stream of the cooling means of vehicle power drive system according to an exemplary embodiment Cheng Tu, as shown in fig. 6, obtaining the real-time of cooling system according to the system temperature of power drive system described in step 120 in Fig. 1 Cooling requirement amount, comprises the following steps：
Step 121, to preceding driving motor body temperature, rear driving motor body temperature, preceding drive motor controller temperature And rear drive motor controller temperature is filtered processing, obtains Current Temperatures.
Step 122, the temperature range residing for Current Temperatures is determined, the temperature range includes basic control zone, ratio controls Area or limit control zone, the wherein temperature range of ratio control zone are higher than basic control zone, and the temperature range of limit control zone is high In ratio control zone.
Step 123, the cooling system control strategy according to corresponding to obtaining temperature range, the cooling system control strategy bag Include：The parameter setting of the aperture of three valve opening 301 of the rotating speed of fan 306, the rotating speed of water pump 304 and cooling circuit.
Illustratively, the basic control flow of water pump 304 and fan 306 can be set as in basic control zone, cooling system The 15% of specified controlled quentity controlled variable and 40%；And the maximum controlled quentity controlled variable of water pump 304 and fan 306 in limit control zone, cooling system It can be set as the 85% and 95% of specified controlled quentity controlled variable；The value of the basic control flow of cooling device and maximum controlled quentity controlled variable passes through mark Fixed experiment and parts performance parameter obtain.In proportion control areas, the cooling requirement amount of motor is then between cooling device Basic control flow and maximum controlled quentity controlled variable between, in proportion control areas, the output control amount of water pump 304 and fan 306 relies on In current drive motor controller temperature and the temperature of motor body, and these temperature and cooling device in cooling system Output control amount is substantially in piecewise linear relationship, it is however generally that, temperature value is higher, and cooling requirement value is bigger.
In basic control zone and limit control zone, the ratio of the aperture of three valve opening 301 is positively retained at 0.5：0.5.Three open The ratio control range of the aperture of valve 301 is in 0.3：0.7 to 0.7：Between 0.3, the scope is by determining pipeline coolant Flow velocity and the comprehensive assessment of pipeline heat-sinking capability obtain.
In the vehicle of typical driven by power, preceding driving electric system 302 and rear driving electric system 303, above-mentioned To calculate respective cooling demand in real time during calculating process respectively, the difference of the cooling requirement amount of the two by for it is preceding, The aperture regulation of three valve opening 301 of rear-guard coolant rate pro rate is realized.
In summary, the cooling means for the vehicle power drive system that the disclosure provides, passes through the hair according to power drive system Thermal power obtains the prediction cooling requirement amount of cooling system；The reality of cooling system is obtained further according to the system temperature of power drive system When cooling requirement amount；The control parameter of cooling system is determined according to prediction cooling requirement amount and real-time cooling demand.Due to driving The heat dispersion and the temperature of environment temperature and coolant of dynamic motor have compared with Important Relations, and the caloric value of motor is usual It is related to motor heating power consumption, therefore the disclosure passes through the temperature of the amount of combination motor, environment temperature and coolant Spend and the radiating requirements of whole cooling circuit are predicted, while the temperature of monitoring driving motor and controller obtains in real time Cooling demand in real time, combined by the two and determine the control strategy of cooling system, can according to the cooling requirement of reality come The problem of cooling capacity corresponding to distribution, reducing system energy consumption, and avoiding control lag.
Fig. 7 is a kind of block diagram of the cooling device of vehicle power drive system according to an exemplary embodiment, such as Fig. 7 Shown, the device 700 includes：
Cooling requirement amount acquisition module 710 is predicted, for being sent out according to current environmental temperature, coolant temperature, motor Thermal power, motor body temperature and drive motor controller temperature, obtain the prediction cooling requirement amount of cooling system.
Cooling demand acquisition module 720 in real time, for according to motor body temperature and drive motor controller Temperature obtains the real-time cooling demand of cooling system.
Control parameter determining module 730, cooling system is determined for according to prediction cooling requirement amount and cooling down demand in real time The control parameter of system.
Further, Fig. 8 is the cooling device of another vehicle power drive system according to an exemplary embodiment Block diagram, as shown in figure 8, the device 700 also includes：
Parameter acquisition module 740, for obtaining the heating power of power drive system, the system temperature of power drive system and cold But the coolant temperature of system.
Wherein, the heating power of power drive system includes the motor heating power of power drive system；Power drive system System temperature include the current environmental temperature of power drive system, the motor body temperature and driving electricity of power drive system Machine controller temperature；The coolant temperature of cooling system, including preceding motor cooling circuit inlet temperature and rear motor Cooling circuit inlet temperature.
Optionally, Fig. 9 is a kind of block diagram of prediction cooling requirement acquisition module according to an exemplary embodiment, such as Shown in Fig. 9, prediction cooling requirement amount acquisition module 710, including：
Coolant demand determination sub-module 711, for according to preceding motor cooling circuit inlet temperature and rear driving electricity Machine cooling circuit inlet temperature, determine coolant cooling requirement percentage.
Motor cooling requirement determination sub-module 712, for according to motor heating power, motor this body temperature Degree and drive motor controller temperature, determine motor cooling requirement percentage, motor heating power includes forerunner Dynamic the motor feels hot power and rear driving the motor feels hot power, motor body temperature include preceding driving motor body temperature and after Motor body temperature, drive motor controller temperature include preceding drive motor controller temperature and rear drive motor controller Temperature, motor cooling requirement percentage include preceding motor cooling requirement percentage and rear motor cooling requirement hundred Divide ratio.
Precooling demand determination sub-module 713, for by coolant cooling requirement percentage and motor cooling requirement Percentage is defined as predicting cooling requirement amount.
Optionally, Figure 10 is a kind of block diagram of coolant demand determination sub-module according to an exemplary embodiment, As shown in Figure 10, coolant demand determination sub-module 711, including：
Optimum temperature acquisition submodule 7111, for utilizing the corresponding relation of default environment temperature and coolant temperature, Obtain the optimum temperature that the coolant under current environmental temperature needs to keep.
Temperature maximum selects submodule 7112, for motor cooling circuit inlet temperature before selecting and rear driving electricity Maximum in machine cooling circuit inlet temperature.
Difference acquisition submodule 7113, for obtaining the difference of optimum temperature and maximum, as coolant cooling requirement Control targe increment size.
Normalized submodule 7114, for the cooling according to control targe increment size and the drive system pre-set The metric of tolerance is normalized, and obtains coolant cooling requirement percentage.
Optionally, Figure 11 is a kind of motor cooling requirement determination sub-module according to an exemplary embodiment Block diagram, as shown in figure 9, motor cooling requirement determination sub-module 712, including：
Filtering process submodule 7121, for being filtered processing to motor heating power, filtering process includes one Rank filters and gradient filtering.
Integral Processing submodule 7122, for being carried out to the motor heating power after filtering process in preset period of time Aggregate-value is assessed in Integral Processing, the motor thermal losses obtained in preset period of time.
Thermal losses value calculating sub module 7123, for motor thermal losses to be assessed into aggregate-value conversion using preset algorithm For the motor thermal losses value in preset period of time.
Cooling requirement determination sub-module 7124, for according to motor thermal losses value, motor body temperature and Drive motor controller temperature, determine motor cooling requirement percentage.
Wherein, motor heating power is preceding driving the motor feels hot power, and motor body temperature is preceding driving electricity Machine body temperature, when drive motor controller temperature is preceding drive motor controller temperature, motor cooling requirement percentage For preceding motor cooling requirement percentage；Motor heating power be after driving the motor feels hot power, motor body Temperature drives motor body temperature, when drive motor controller temperature is rear drive motor controller temperature, motor after being Cooling requirement percentage is rear motor cooling requirement percentage.
Optionally, Figure 12 is a kind of block diagram of cooling requirement acquisition module in real time according to an exemplary embodiment, As shown in figure 12, demand acquisition module 720 is cooled down in real time, including：
Current Temperatures acquisition submodule 721, for preceding driving motor body temperature, rear driving motor body temperature, preceding Drive motor controller temperature and rear drive motor controller temperature are filtered processing, obtain Current Temperatures.
Temperature range determination sub-module 722, for determining the temperature range residing for Current Temperatures, temperature range includes basic Control zone, ratio control zone or limit control zone, the wherein temperature range of ratio control zone are higher than basic control zone, limit control The temperature range in area is higher than ratio control zone.
Control strategy acquisition submodule 723, for cooling system control strategy corresponding to being obtained according to temperature range, cooling System control strategy includes：The parameter setting of the aperture of three valve opening of rotation speed of the fan, pump rotary speed and cooling circuit.
Real-time cooling requirement determination sub-module 724, for determining the real-time of cooling system according to cooling system control strategy Cooling requirement amount.
Optionally, control parameter determining module 730, is used for：
Carry out coupling the control parameter for obtaining cooling system by prediction cooling requirement amount and cooling down demand in real time.
Wherein, coupled modes include：Choose maximum, weighted average or choose the side that maximum and weighted average combine Formula.
In summary, the cooling device for the vehicle power drive system that the disclosure provides, passes through the hair according to power drive system Thermal power obtains the prediction cooling requirement amount of cooling system；The reality of cooling system is obtained further according to the system temperature of power drive system When cooling requirement amount；The control parameter of cooling system is determined according to prediction cooling requirement amount and real-time cooling demand.Due to driving The heat dispersion and the temperature of environment temperature and coolant of dynamic motor have compared with Important Relations, and the caloric value of motor is usual It is related to motor heating power consumption, therefore the disclosure passes through the temperature of the amount of combination motor, environment temperature and coolant Spend and the radiating requirements of whole cooling circuit are predicted, while the temperature of monitoring driving motor and controller obtains in real time Cooling demand in real time, combined by the two and determine the control strategy of cooling system, can according to the cooling requirement of reality come The problem of cooling capacity corresponding to distribution, reducing system energy consumption, and avoiding control lag.
The preferred embodiment of the disclosure is described in detail above in association with accompanying drawing, still, the disclosure is not limited to above-mentioned reality The detail in mode is applied, in the range of the technology design of the disclosure, a variety of letters can be carried out to the technical method of the disclosure Monotropic type, these simple variants belong to the protection domain of the disclosure.
It is further to note that each particular technique feature described in above-mentioned embodiment, in not lance In the case of shield, it can be combined by any suitable means.In order to avoid unnecessary repetition, the disclosure to it is various can The combination of energy no longer separately illustrates.
In addition, it can also be combined between a variety of embodiments of the disclosure, as long as it is without prejudice to originally Disclosed thought, it should equally be considered as disclosure disclosure of that.

Claims (14)

1. a kind of cooling means of vehicle power drive system, it is characterised in that methods described includes：
The prediction cooling requirement amount of cooling system is obtained according to the heating power of the power drive system；
The real-time cooling demand of the cooling system is obtained according to the system temperature of the power drive system；
The control parameter of the cooling system is determined according to the prediction cooling requirement amount and the demand of cooling in real time.
2. according to the method for claim 1, it is characterised in that obtained in the heating power according to the power drive system Before taking the prediction cooling requirement amount of cooling system, methods described also includes：
Obtain the cooling of the heating power of the power drive system, the system temperature of the power drive system and the cooling system Liquid temperature degree；
Wherein, the heating power of the power drive system includes the motor heating power of the power drive system；The electricity The system temperature of drive system includes the current environmental temperature of the power drive system, the motor sheet of the power drive system Temperature and drive motor controller temperature；The coolant temperature of the cooling system, including preceding motor cooling circuit Inlet temperature and rear motor cooling circuit inlet temperature.
3. according to the method for claim 2, it is characterised in that described to be obtained according to the heating power of the power drive system The prediction cooling requirement amount of cooling system, including：
According to the preceding motor cooling circuit inlet temperature and the rear motor cooling circuit inlet temperature, determine cold But liquid cooling requirement percentage；
According to the motor heating power, the motor body temperature and the drive motor controller temperature, Determine motor cooling requirement percentage, the motor heating power includes preceding driving the motor feels hot power and rear driving The motor feels hot power, the motor body temperature include preceding driving motor body temperature and rear driving motor body temperature, The drive motor controller temperature includes preceding drive motor controller temperature and rear drive motor controller temperature, the driving Motor cooling requirement percentage includes preceding motor cooling requirement percentage and rear motor cooling requirement percentage；
The coolant cooling requirement percentage and the motor cooling requirement percentage are defined as the prediction cooling Demand.
4. according to the method for claim 3, it is characterised in that described according to the preceding motor cooling circuit entrance temperature Degree and the rear motor cooling circuit inlet temperature, determine coolant cooling requirement percentage, including：
Using the corresponding relation of default environment temperature and coolant temperature, obtaining the coolant under the current environmental temperature needs The optimum temperature to be kept；
Select in the preceding motor cooling circuit inlet temperature and the rear motor cooling circuit inlet temperature most Big value；
The difference of the optimum temperature and the maximum is obtained, the control targe increment size as coolant cooling requirement；
Carried out according to the control targe increment size and the metric of the cooling tolerance of the power drive system pre-set Normalized, obtain the coolant cooling requirement percentage.
5. according to the method for claim 3, it is characterised in that described according to the motor heating power, the drive Dynamic motor body temperature and the drive motor controller temperature, determine motor cooling requirement percentage, including：
Processing is filtered to the motor heating power, the filtering process includes first-order filtering and gradient filtering；
Integral Processing in preset period of time is carried out to the motor heating power after filtering process, obtained described default Aggregate-value is assessed in motor thermal losses in period；
Motor thermal losses assessment aggregate-value is converted into motor in the preset period of time using preset algorithm Thermal losses value；
According to the motor thermal losses value, the motor body temperature and the drive motor controller temperature, Determine the motor cooling requirement percentage；
Wherein, the motor heating power is the motor feels hot the power of driving before described, and the motor body temperature is Driving motor body temperature before described, when the drive motor controller temperature is the preceding drive motor controller temperature, institute It is the preceding motor cooling requirement percentage to state motor cooling requirement percentage；The motor heating power is Driving the motor feels hot power after described, the motor body temperature are driving motor body temperature after described, the driving When electric machine controller temperature is the rear drive motor controller temperature, after the motor cooling requirement percentage is described Motor cooling requirement percentage.
6. according to the method for claim 2, it is characterised in that described to be obtained according to the system temperature of the power drive system The real-time cooling demand of the cooling system, including：
To the preceding driving motor body temperature, the rear driving motor body temperature, the preceding drive motor controller temperature And the rear drive motor controller temperature is filtered processing, obtains Current Temperatures；
The temperature range residing for the Current Temperatures is determined, the temperature range includes basic control zone, ratio control zone or pole Control zone is limited, wherein the temperature range of the ratio control zone is higher than the basic control zone, the temperature of the limit control zone Scope is higher than the ratio control zone；
The cooling system control strategy according to corresponding to obtaining the temperature range, the cooling system control strategy include：Fan The parameter setting of the aperture of three valve opening of rotating speed, pump rotary speed and the cooling circuit；
The real-time cooling demand of the cooling system is determined according to the cooling system control strategy.
7. according to the method for claim 2, it is characterised in that described according to the prediction cooling requirement amount and described real-time Cooling requirement amount determines the control parameter of the cooling system, including：
The control for obtaining the cooling system by carrying out coupling to the prediction cooling requirement amount and the demand of cooling in real time Parameter processed；
Wherein, coupled modes include：Choose maximum, weighted average or the selection maximum and the weighted average combines Mode.
8. a kind of cooling device of vehicle power drive system, it is characterised in that methods described includes：
Cooling requirement amount acquisition module is predicted, for obtaining the prediction of cooling system according to the heating power of the power drive system Cooling requirement amount；
Cooling demand acquisition module in real time, for obtaining the cooling system according to the system temperature of the power drive system Cooling demand in real time；
Control parameter determining module, it is described cold for being determined according to the prediction cooling requirement amount and the demand of cooling in real time But the control parameter of system.
9. device according to claim 8, it is characterised in that described device also includes：
Parameter acquisition module, for being cooled down in the prediction that cooling system is obtained according to the heating power of the power drive system Before demand, the heating power of the power drive system, the system temperature of the power drive system and the cooling system are obtained The coolant temperature of system；
Wherein, the heating power of the power drive system includes the motor heating power of the power drive system；The electricity The system temperature of drive system includes the current environmental temperature of the power drive system, the motor sheet of the power drive system Temperature and drive motor controller temperature；The coolant temperature of the cooling system, including preceding motor cooling circuit Inlet temperature and rear motor cooling circuit inlet temperature.
10. device according to claim 9, it is characterised in that the prediction cooling requirement amount acquisition module, including：
Coolant demand percentage determination sub-module, for according to the preceding motor cooling circuit inlet temperature and it is described after Motor cooling circuit inlet temperature, determine coolant cooling requirement percentage；
Motor cooling requirement percentage determination sub-module, for according to the motor heating power, the driving electricity Machine body temperature and the drive motor controller temperature, determine motor cooling requirement percentage, the motor Heating power includes preceding driving the motor feels hot power and rear driving the motor feels hot power, before the motor body temperature includes Motor body temperature and rear driving motor body temperature, the drive motor controller temperature include preceding driving motor control Device temperature and rear drive motor controller temperature, the motor cooling requirement percentage include preceding motor cooling requirement Percentage and rear motor cooling requirement percentage；
Cooling requirement amount determination sub-module is predicted, for the coolant cooling requirement percentage and the motor to be cooled down Demand percentage is defined as the prediction cooling requirement amount.
11. device according to claim 10, it is characterised in that the coolant demand percentage determination sub-module, bag Include：
Optimum temperature acquisition submodule, for the corresponding relation using default environment temperature and coolant temperature, obtain in institute State the optimum temperature that coolant under current environmental temperature needs to keep；
Temperature maximum selects submodule, for selecting the preceding motor cooling circuit inlet temperature and the rear driving electricity Maximum in machine cooling circuit inlet temperature；
Difference acquisition submodule, for obtaining the difference of the optimum temperature and the maximum, as coolant cooling requirement Control targe increment size；
Normalized submodule, for according to the cold of the control targe increment size and the power drive system that pre-sets But the metric of tolerance is normalized, and obtains the coolant cooling requirement percentage.
12. device according to claim 10, it is characterised in that the motor cooling requirement percentage determines submodule Block, including：
Filtering process submodule, for being filtered processing to the motor heating power, the filtering process includes one Rank filters and gradient filtering；
Integral Processing submodule, for carrying out the integration in preset period of time to the motor heating power after filtering process Aggregate-value is assessed in processing, the motor thermal losses obtained in the preset period of time；
Thermal losses value calculating sub module, for motor thermal losses assessment aggregate-value to be converted into institute using preset algorithm State the motor thermal losses value in preset period of time；
Cooling requirement determination sub-module, for according to the motor thermal losses value, the motor body temperature and The drive motor controller temperature, determine the motor cooling requirement percentage；
Wherein, the motor heating power is the motor feels hot the power of driving before described, and the motor body temperature is Driving motor body temperature before described, when the drive motor controller temperature is the preceding drive motor controller temperature, institute It is the preceding motor cooling requirement percentage to state motor cooling requirement percentage；The motor heating power is Driving the motor feels hot power after described, the motor body temperature are driving motor body temperature after described, the driving When electric machine controller temperature is the rear drive motor controller temperature, after the motor cooling requirement percentage is described Motor cooling requirement percentage.
13. device according to claim 9, it is characterised in that the cooling demand acquisition module in real time, including：
Current Temperatures acquisition submodule, for the preceding driving motor body temperature, the rear driving motor body temperature, institute Drive motor controller temperature and the rear drive motor controller temperature are filtered processing before stating, and obtain Current Temperatures；
Temperature range determination sub-module, for determining the temperature range residing for the Current Temperatures, the temperature range includes base This control zone, ratio control zone or limit control zone, wherein the temperature range of the ratio control zone is higher than the basic control Area, the temperature range of the limit control zone are higher than the ratio control zone；
Control strategy acquisition submodule, it is described cold for the cooling system control strategy according to corresponding to temperature range acquisition But system control strategy includes：The parameter setting of the aperture of three valve opening of rotation speed of the fan, pump rotary speed and the cooling circuit；
Real-time cooling requirement determination sub-module, for determining the real-time of the cooling system according to the cooling system control strategy Cooling requirement amount.
14. device according to claim 9, it is characterised in that the control parameter determining module, be used for：
The control for obtaining the cooling system by carrying out coupling to the prediction cooling requirement amount and the demand of cooling in real time Parameter processed；
Wherein, coupled modes include：Choose maximum, weighted average or the selection maximum and the weighted average combines Mode.
CN201710313485.3A 2017-05-05 2017-05-05 Method and device for cooling an electric drive system of a vehicle Expired - Fee Related CN107499176B (en)

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CN115023095A (en) * 2021-03-03 2022-09-06 观致汽车有限公司 Motor controller cooling method, storage medium, vehicle, and cooling device
CN115348800A (en) * 2022-07-19 2022-11-15 岚图汽车科技有限公司 Thermal management method for vehicle controller and related device
CN115459523A (en) * 2022-11-09 2022-12-09 山东科技职业学院 Self-driven heat dissipation permanent magnet motor
CN115580082A (en) * 2022-10-24 2023-01-06 江阴市海达电机冲片有限公司 Heat dissipation processing system and method for iron core of variable-pitch servo motor of wind turbine generator
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CN118100532A (en) * 2024-01-15 2024-05-28 北京交通大学 Cooling device based on thermal network model and control method thereof
CN118457272A (en) * 2024-07-11 2024-08-09 比亚迪股份有限公司 Electric drive assembly, control method of vehicle and vehicle
CN118473109A (en) * 2024-07-11 2024-08-09 比亚迪股份有限公司 Electric drive system, control method thereof and vehicle
CN118457273A (en) * 2024-07-11 2024-08-09 比亚迪股份有限公司 Electric drive assembly, control method of vehicle and vehicle
CN118473109B (en) * 2024-07-11 2024-10-29 比亚迪股份有限公司 Electric drive system, control method thereof and vehicle

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CN108819687A (en) * 2018-06-26 2018-11-16 南京恒天领锐汽车有限公司 A kind of bi-motor 4 wheel driven pure electric coach cooling system and its cooling means
CN108973652A (en) * 2018-07-24 2018-12-11 北京新能源汽车股份有限公司 Heat dissipation control method, device and equipment
CN109703377A (en) * 2018-12-24 2019-05-03 深圳市英威腾电动汽车驱动技术有限公司 Control method, device, computer equipment and the storage medium of radiating element
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CN111376710A (en) * 2018-12-28 2020-07-07 长城汽车股份有限公司 Vehicle heat dissipation control method and system
CN111376709B (en) * 2018-12-28 2021-11-23 长城汽车股份有限公司 Vehicle heat dissipation control method and system
CN111376710B (en) * 2018-12-28 2021-11-26 长城汽车股份有限公司 Vehicle heat dissipation control method and system
CN113165505B (en) * 2019-01-14 2024-02-23 康明斯公司 Predictive cooling control system and method for an electric vehicle
CN113165505A (en) * 2019-01-14 2021-07-23 康明斯公司 Predictive cooling control system and method for electric vehicle
CN109976143A (en) * 2019-03-12 2019-07-05 广州市庆瑞电子科技有限公司 A kind of environmental test equipment energy-saving control method
CN109976143B (en) * 2019-03-12 2021-09-21 广州市庆瑞电子科技有限公司 Energy-saving control method for environment test equipment
CN110978974A (en) * 2019-12-10 2020-04-10 上海元城汽车技术有限公司 Motor and cooling control method and device of controller of motor
CN110978974B (en) * 2019-12-10 2021-08-06 上海元城汽车技术有限公司 Motor and cooling control method and device of controller of motor
CN112060903A (en) * 2020-08-25 2020-12-11 长城汽车股份有限公司 Vehicle cooling control method and system and vehicle
CN112822916B (en) * 2020-12-30 2022-07-22 徐州中矿大传动与自动化有限公司 Heat dissipation control method and device for large electromechanical equipment
CN112822916A (en) * 2020-12-30 2021-05-18 徐州中矿大传动与自动化有限公司 Heat dissipation control method and device for large electromechanical equipment
CN115023095A (en) * 2021-03-03 2022-09-06 观致汽车有限公司 Motor controller cooling method, storage medium, vehicle, and cooling device
WO2022222701A1 (en) * 2021-04-19 2022-10-27 长城汽车股份有限公司 Vehicle thermal management system and control method and apparatus therefor, storage medium and vehicle
CN114368257A (en) * 2021-04-19 2022-04-19 长城汽车股份有限公司 Vehicle thermal management system, control method and device thereof, storage medium and vehicle
CN114368257B (en) * 2021-04-19 2023-09-15 长城汽车股份有限公司 Vehicle thermal management system, control method and device thereof, storage medium and vehicle
CN115348800A (en) * 2022-07-19 2022-11-15 岚图汽车科技有限公司 Thermal management method for vehicle controller and related device
CN115580082A (en) * 2022-10-24 2023-01-06 江阴市海达电机冲片有限公司 Heat dissipation processing system and method for iron core of variable-pitch servo motor of wind turbine generator
CN115580082B (en) * 2022-10-24 2023-03-17 江阴市海达电机冲片有限公司 Heat dissipation processing system and method for iron core of variable-pitch servo motor of wind turbine generator
CN115686102B (en) * 2022-10-31 2024-01-26 三一专用汽车有限责任公司 Motor temperature control method and device and engineering vehicle
CN115686102A (en) * 2022-10-31 2023-02-03 三一专用汽车有限责任公司 Motor temperature control method and device and engineering vehicle
CN115459523A (en) * 2022-11-09 2022-12-09 山东科技职业学院 Self-driven heat dissipation permanent magnet motor
CN115459523B (en) * 2022-11-09 2023-01-10 山东科技职业学院 Self-driven heat dissipation permanent magnet motor
CN118100532A (en) * 2024-01-15 2024-05-28 北京交通大学 Cooling device based on thermal network model and control method thereof
CN118457272A (en) * 2024-07-11 2024-08-09 比亚迪股份有限公司 Electric drive assembly, control method of vehicle and vehicle
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