CN107645020A - Electric car heat management control method and system - Google Patents
Electric car heat management control method and system Download PDFInfo
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- CN107645020A CN107645020A CN201710845165.2A CN201710845165A CN107645020A CN 107645020 A CN107645020 A CN 107645020A CN 201710845165 A CN201710845165 A CN 201710845165A CN 107645020 A CN107645020 A CN 107645020A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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Abstract
A kind of electric car thermal management algorithm and system, including temperature detection：Detection battery or battery core temperature simultaneously record；Temperature judges：Judge battery or battery core temperature whether in hot operation temperature range；Temperature is performed if without departing from hot operation temperature range to compare：Compare Current Temperatures and last temperature；Cooling is performed if Current Temperatures are more than last temperature：It is scaled up the dynamical element rotating speed of cooling system；Repeat the above steps until the dynamical element full-speed operation of cooling system；Above-mentioned electric car thermal management algorithm and system, the dynamical element rotating speed for making cooling system according to setting ratio raising cooling system by setting adjustment ratio, optimal adjustment ratio can be modified to according to actual conditions, meets whole equipment optimized operation state, reduces energy waste；Cooling is adjusted to cooling system power more in time to temperature before and after battery core, battery is adjusted to by optimum working temperature scope with most power save mode, reduces energy consumption while the operating efficiency for improving battery.
Description
Technical field
The present invention relates to electric automobile field, more particularly to a kind of electric car thermal management algorithm and system.
Background technology
In existing electric car heat management control method, the control of cooling system mainly uses 3 sections of period control methods, works as electricity
When core temperature reaches a, 1 gear rotating speed is used；When battery core temperature reaches b, 2 gear rotating speeds are used；When battery core temperature reaches c, make
With 3 gear rotating speeds;The control to battery core temperature is realized with this；And this control is not intelligent, the waste of electric energy is caused, noise is big, reduces
Passenger's driving experience.
Such as assume that battery core work maximum temperature need to be controlled in below 40C, when using a dash pump fan rotating speeds, battery core temperature
Spend for 42C, still above standard 40C, it is therefore desirable to increase water pump/rotation speed of the fan and keep off to b.Assuming that at this moment battery core temperature is 30C,
This operation interval between 30 ~ 40C of that battery core temperature is to waste, you can to keep off it using water pump/rotation speed of the fan a gears and b
Between some rotating speed, make battery temperature in 35 ~ 38C or so, to meet battery operating temperature scope, reduce water pump fan and turn
Speed, the ability of consumption is reduced, relative can improve vehicle driving mileage.
The content of the invention
Based on this, it is necessary to provide a kind of electric car thermal management algorithm for improving energy-saving efficiency.
Simultaneously, there is provided a kind of electrombile thermal management system for improving energy-saving efficiency.
A kind of electric car thermal management algorithm, comprises the following steps：
Temperature detection：Detection battery or battery core temperature simultaneously record,
Temperature judges：Battery or battery core temperature are judged whether in hot operation temperature range,
If without departing from hot operation temperature range, perform
Temperature compares：Comparative cell or the Current Temperatures of battery core and last detection temperature,
If Current Temperatures are more than last detection temperature, perform
Cooling：According to the current rotating speed of cooling system dynamical element, in the dynamical element of setting adjustment ratio raising cooling system
Rotating speed；
Repeat the above steps until the dynamical element full-speed operation of cooling system.
In a preferred embodiment, the cooling includes：Water pump cools：According to current pump rotary speed, by the water of setting
The PWM duty cycle that pump speed-raising ratio improves water pump adjusts pump rotary speed.
In a preferred embodiment, the cooling also includes：Fan for cooling：When the PWM duty cycle of water pump is adjusted to 100%
PWM duty cycle full-speed operation, start fan work if judging that Current Temperatures are more than last temperature, update battery or battery core temperature
Degree；If battery or battery core temperature continue to raise, according to the current rotating speed of fan, fan is improved in the fan speed-raising ratio of setting
PWM duty cycle adjust rotation speed of the fan.
In a preferred embodiment, in addition to postpone, after performing the cooling step, perform delay step delay setting
After time delay, temperature detection step is performed；If in temperature comparison step, battery or battery core temperature are in hot operation temperature range
It is interior, and Current Temperatures then perform temperature detection step equal to or less than last temperature；Also include：Cooling system starts：Vehicle
After startup, if detecting, battery or battery core temperature are more than the cooling system start-up temperature of setting, start cooling system.
In a preferred embodiment, in addition to：Early warning/alarm, if in temperature judgment step, battery or battery core Current Temperatures
Maximum temperature more than hot operation temperature range then performs
Early warning/alarm：If judging Current Temperatures in the range of the first alarm temperature, all cooling system dynamical elements are controlled
100% dutycycle full-speed operation.
In a preferred embodiment, the early warning/alarm includes：Second early warning/alarm：If judging, Current Temperatures are more than the
Two alarm temperatures and in the range of the second alarm temperature, then limit the power output of vehicle, by setting ratio or setting grade according to
The secondary power output for reducing vehicle；Early warning/the alarm also includes three early warning/alarm：If judging, Current Temperatures are more than the 3rd
Alarm temperature, then warning reminding.
In a preferred embodiment, if judging in temperature judgment step, battery or battery core temperature Current Temperatures are less than high temperature work
Make the minimum temperature of temperature range, then perform
Low temperature judges：Battery or battery core temperature Current Temperatures are judged whether in the low-temperature working temperature range set,
If in low-temperature working temperature range, perform
Cooling system reduction of speed：If cooling system is in running order, according to the current rotating speed of the dynamical element of cooling system, by setting
Fixed reduction of speed ratio reduces the dynamical element rotating speed of cooling system；
Performed after cooling system reduction of speed step
Temperature detection：Detection battery or battery core temperature simultaneously record；
Temperature judges：Battery or battery core temperature are judged whether in hot operation temperature range,
If battery or battery core temperature Current Temperatures are less than the minimum temperature of hot operation temperature range, perform
Low temperature judges：Battery or battery core temperature Current Temperatures are judged whether in the low-temperature working temperature range set,
If judging, battery or battery core temperature Current Temperatures are in the low-temperature working temperature range of setting, are performed
Cooling system reduction of speed：If cooling system is in running order, according to the current rotating speed of the dynamical element of cooling system, by setting
Fixed reduction of speed ratio, reduce the dynamical element rotating speed of cooling system；
So circulation is until cooling system is stopped or cooling system power-off；
If low temperature judgment step judges that battery or battery core temperature Current Temperatures are less than the minimum temperature of low-temperature working temperature range, if
Cooling is set then controls cooling system to be stopped also in working condition, performs
Heating stepses：Control firing equipment battery is heated, and according to different temperatures perform different heating gear or according to
Setting ratio adjusts the heating power of firing equipment,
Temperature detection is performed after heating stepses：Detection battery or battery core temperature simultaneously record.
In a preferred embodiment, the cooling system reduction of speed includes：
Fan reduction of speed：Start fan reduction of speed, according to the current rotating speed of fan, the PWM that fan is reduced in the reduction of speed ratio of setting is accounted for
Sky compares to reduce rotation speed of the fan；
Performed after fan reduction of speed step
Temperature detection：Detection battery or battery core temperature simultaneously record,
Temperature judges：Battery or battery core temperature are judged whether in hot operation temperature range,
If battery or battery core temperature Current Temperatures are less than the minimum temperature of hot operation temperature range, perform
Low temperature judges：Battery or battery core temperature Current Temperatures are judged whether in the low-temperature working temperature range set,
If judging, battery or battery core temperature Current Temperatures are in the low-temperature working temperature range of setting, are performed
Fan reduction of speed：Start fan reduction of speed, according to the current rotating speed of fan, the PWM that fan is reduced in the reduction of speed ratio of setting is accounted for
Sky compares to reduce rotation speed of the fan,
So circulation, until fan is stopped or fan power supply is closed；
The cooling system reduction of speed also includes：Water pump reduction of speed,
If perform fan slow down after, fan be stopped or fan power supply close after, then perform
Temperature detection：Detection battery or battery core temperature simultaneously record；
Temperature judges：Battery or battery core temperature are judged whether in hot operation temperature range,
If battery or battery core temperature Current Temperatures are less than the minimum temperature of hot operation temperature range, perform
Low temperature judges：Battery or battery core temperature Current Temperatures are judged whether in the low-temperature working temperature range set,
If judging, battery or battery core temperature Current Temperatures are in the low-temperature working temperature range of setting, are performed
Water pump reduction of speed：According to the current rotating speed of water pump, water pump is reduced in the PWM duty cycle of the reduction of speed ratio reduction water pump of setting
Rotating speed,
Temperature detection：Detection battery or battery core temperature simultaneously record；
So circulation, until water pump is stopped or pump power is closed.
A kind of electrombile thermal management system, including：
Temperature detecting module：Detection battery or battery core temperature simultaneously record, and are connected to
Temperature judge module：Battery or battery core temperature are judged whether in hot operation temperature range,
If without departing from hot operation temperature range, it is connected to
Temperature comparison module：Compare Current Temperatures and last temperature,
If Current Temperatures are more than last temperature, it is connected to
Cooling module：According to setting ratio, the dynamical element rotating speed of cooling system is scaled up,
And temperature detecting module is connected to, until the dynamical element full-speed operation of cooling system.
In a preferred embodiment, the cooling module includes：Water pump cooling module, fan for cooling module, the water pump
Cooling module：According to current pump rotary speed, water pump is adjusted in the PWM duty cycle of the water pump speed-raising ratio raising water pump of setting
Rotating speed, and it is connected to temperature detecting module；When the PWM duty cycle of water pump is adjusted to 100% full-speed operation, if temperature judge module
Battery or battery core temperature are judged in hot operation temperature range, and temperature comparison module judges that Current Temperatures are more than last temperature
Degree is then connected to fan for cooling module, and fan for cooling module is carried according to the current rotating speed of fan in the fan speed-raising ratio of setting
The PWM duty cycle of high fan adjusts rotation speed of the fan, and is connected to temperature detecting module.
Above-mentioned electric car thermal management algorithm and system, by setting adjustment ratio, make cooling system according to setting ratio
The dynamical element rotating speed of cooling system is improved, the adjustment ratio of the cooling system of setting can modify as needed, according to reality
Border situation is modified to optimal adjustment ratio, meets whole equipment optimized operation state, and reduce energy waste；By examining in real time
Survey battery core temperature, to temperature before and after battery core relatively after, cooling system power is adjusted in time, to be dropped in time to battery core
Temperature, battery core operating temperature maximum possible is maintained in normal range of operation, avoid adjusting the adjustment that brings of hysteresis quality it is difficult or
The problem of can not adjusting, and the energy consumption and problem of resource waste that adjustment hysteresis quality is brought；Entered in proportion by setting ratio simultaneously
Row adjustment, stepless speed regulation is carried out to cooling system, preferably meet use demand during battery work, with most power save mode by electricity
Pond is adjusted to optimum working temperature scope, reduces energy consumption while the operating efficiency for improving battery.
Brief description of the drawings
Fig. 1 is the schematic flow sheet of the electric car thermal management algorithm of one embodiment of the invention；
Fig. 2 is the schematic flow sheet of the electric car thermal management algorithm of one embodiment of the present invention；
Fig. 3 is the schematic flow sheet of the electric car thermal management algorithm of another preferred embodiment of the present invention；
Fig. 4 is the schematic diagram of the electrombile thermal management system of one embodiment of the invention；
Fig. 5 is the schematic diagram of the electrombile thermal management system of one embodiment of the present invention.
Embodiment
As shown in figure 1, the electric car thermal management algorithm of one embodiment of the invention, including：Following steps：
Step S101, temperature detection：Detection battery or battery core temperature simultaneously record,
Step S103, temperature judge：Battery or battery core temperature are judged whether in hot operation temperature range,
If without departing from hot operation temperature range, perform
Step S105, temperature compare：Compare Current Temperatures and last temperature,
If Current Temperatures are more than last temperature, perform
Step S107, cooling：According to setting ratio, the dynamical element rotating speed of cooling system is scaled up；
Repeat the above steps until the dynamical element full-speed operation of cooling system.
The cooling system of the present embodiment refers mainly to the cooling system to be cooled for battery.
As shown in Fig. 2 further, it is preferred that the step S107 coolings of the present embodiment include：Water pump cools.Water pump cools：
According to current pump rotary speed, pump rotary speed is adjusted in the PWM duty cycle of the water pump speed-raising ratio e raising water pumps of setting.This
The water pump speed-raising ratio d of embodiment is preferably 5%PWM dutycycles.
Further, it is preferred that the step S107 coolings of the present embodiment also include：Fan for cooling.
After water pump cooling step performs, as the PWM of water pump（Pulse Width Modulation pulse width modulations）Account for
Empty ratio is adjusted to 100% full-speed operation, performs
Step S101, temperature detection：Detection battery or battery core temperature simultaneously record,
Step S103, temperature judge：Battery or battery core temperature are judged whether in hot operation temperature range,
If without departing from hot operation temperature range, perform
Step S105, temperature compare：Compare Current Temperatures and last temperature,
If Current Temperatures are more than last temperature, perform
Fan for cooling：If battery or battery core temperature continue to raise, according to the current rotating speed of fan, by the fan speed-raising ratio of setting
The PWM duty cycle that example f improves fan adjusts rotation speed of the fan.In the present embodiment, fan speed-raising ratio f is preferably 5%PWM duties
Than.
Certainly, the cooling system of the present embodiment can also be air-conditioning equipment, or other radiatings or refrigeration plant, according to setting
Adjustment ratio, the running power of cooling system is scaled.
Further, it is preferred that after cooling, error caused by temperature does not lower also immediately, or temperature fluctuation
Change, or temperature error caused by system is unstable, the electric car thermal management algorithm of the present embodiment, include postponing step.Hold
After row cooling step, step S113 is performed, postpones step：After delay setting time delay x, temperature detection step is performed.
Further, it is preferred that if in temperature comparison step, battery or battery core temperature in hot operation temperature range, and
Current Temperatures are equal to or less than last temperature and then directly perform step S101 temperature detection steps.
Further, it is preferred that the electric car thermal management algorithm of the present embodiment, in addition to：Cooling system starts：Vehicle launch
Afterwards, if detecting, battery or battery core temperature are more than the cooling system start-up temperature of setting, start cooling system.
Preferably, the cooling system starting step of the present embodiment：After vehicle launch, if detecting, battery or battery core temperature are big
In the cooling system start-up temperature of setting, then start water pump, running speed is the water pump initial operation speed of setting.
The startup of the cooling system of the present embodiment, it can also be performed more afterwards using temperature as performed after vehicle launch：Step
S101, temperature detection：Detection battery or battery core temperature simultaneously record,
Step S103, temperature judge：Battery or battery core temperature are judged whether in hot operation temperature range,
If without departing from hot operation temperature range, perform
Step S105, temperature compare：Compare Current Temperatures and last temperature,
If Current Temperatures are more than last temperature, perform cooling system and start.
In the present embodiment, the startup especially such as water pump, other initial start equipment are alternatively certainly.
Further, it is preferred that the electric car thermal management algorithm of the present embodiment, in addition to：Early warning/alarm.If temperature judges
In step, judge that battery or battery core Current Temperatures then perform early warning/report more than a+m DEG C of the maximum temperature of hot operation temperature range
Alert step.
Further, the step S103 of the present embodiment, temperature judge：Judge battery or battery core temperature whether in hot operation temperature
In the range of degree, including：Minimum limit value judges, highest limit value judges.
Step 102, minimum limit value judges：Judge whether battery core temperature is more than hot operation temperature range minimum temperature a.
Step 104, highest limit value judges：Judge whether battery core temperature is more than hot operation temperature range maximum temperature a+m.
Step S111, early warning/alarm include：First early warning/alarm.Hot operation temperature range maximum temperature a+m is the
One alarm temperature.First early warning/alarm：If judge Current Temperatures in the range of the first alarm temperature such as（a+m）℃-（a+h）℃
Between, then control all dutycycle full-speed operations of cooling system dynamical element 100%.In the present embodiment, m is preferably 10 DEG C, and h is excellent
Elect 15 DEG C as.In the present embodiment, cooling system includes：Water pump and fan, when judging Current Temperatures in the first alarm temperature scope
In between a+10 DEG C-a+15 DEG C, then water pump, the dutycycle full-speed operation of fan 100% are controlled.Certainly also other extendible coolings
Equipment or heat dissipation equipment such as air-conditioning etc..
Further, the early warning/alarm of the present embodiment also includes：Second early warning/alarm.Second early warning/alarm：If judge to work as
Preceding temperature is more than the second alarm temperature such as（a+h）DEG C and in the range of the second alarm temperature（a+h）℃-（a+i）DEG C then limit car
Power output；If in the range of judging Current Temperatures also in the second alarm temperature next time, by setting ratio or setting etc.
The power output of level reduction vehicle；And reduce power output successively and carry out power output limitation.In the present embodiment, h is preferably 15
DEG C, i is preferably 20 DEG C.If judging a+15 DEG C-a+20 DEG C of battery or battery core Current Temperatures, the power output of vehicle is limited；If
In the range of judging Current Temperatures also in the second alarm temperature next time, then the output of vehicle is reduced by setting ratio or setting grade
Power；And reduce power output successively and carry out power output limitation.
Further, the step S111 of the present embodiment, early warning/alarm also include：Three early warning/alarm.Three early warning/report
It is alert：If judging, Current Temperatures are more than the 3rd alarm temperature（a+i）DEG C, then control warning reminding.Control sends hydropac, reminds
Driver and occupant leave automobile.
Further, if judging in temperature judgment step, battery or battery core temperature Current Temperatures are less than hot operation temperature range
Minimum temperature, then perform
Low temperature judges：Battery or battery core temperature Current Temperatures are judged whether in the low-temperature working temperature range set, if place
In in low-temperature working temperature range, then perform
Step S119, cooling system reduction of speed：According to the current rotating speed of the dynamical element of cooling system, in the reduction of speed ratio of setting,
The dynamical element rotating speed of cooling system is reduced successively,
Step S101, temperature detection：Detection battery or battery core temperature simultaneously record,
Step S103, temperature judge：Battery or battery core temperature are judged whether in hot operation temperature range,
If judging, battery or battery core temperature Current Temperatures are less than the minimum temperature of hot operation temperature range, perform low temperature and sentence
It is disconnected, so circulation, until the dynamical element of cooling system is stopped or power-off.
In the present embodiment, hot operation temperature range minimum temperature a and low-temperature working temperature range maximum temperature a-n it
Between for battery or battery core preferred operating temperature, cooling system keeps original state in this temperature range, is grasped without change
Make.
In the present embodiment, the minimum temperature a of hot operation temperature range is the upper limit of Optimization Work temperature, preferably 40
℃.Low-temperature working temperature range maximum temperature a-n is the lower limit of Optimization Work temperature, and n is preferably 5 DEG C.Electricity is detected so as to work as
The temperature of pond bag battery core is in（a-n）The drop of the operating temperature state most saved between DEG C-a DEG C i.e. 35-40 DEG C, battery or battery core
Warm equipment keeps original state（Including working condition or halted state or holding state）, do not change control operation.
Further, the low temperature of the present embodiment judges to include：The low temperature upper limit judges, low temperature limits judge.
Step 116, the low temperature upper limit judges：Judge whether battery or battery core temperature are less than the highest of low-temperature working temperature range
Design temperature a-n.
Step 118, low temperature limits judge：Judge whether battery or battery core temperature are less than the minimum of low-temperature working temperature range
Design temperature b.
It is electricity between the lowest set temperature b of low-temperature working temperature range and the minimum temperature a of hot operation temperature range
The preferable operating temperature in pond.The lowest set temperature b of the low-temperature working temperature range of the present embodiment is preferably 0 DEG C.
Further, it is preferred that after performing step S119 cooling system reductions of speed, in addition to step S123, postpone step.Step
S123, after delay step delay setting time delay y, perform temperature detection step.Time delay y can be set with time delay x
It is set to equally, can also be set according to being actually needed to distinguish.
Further, the step S119 cooling system reductions of speed of the present embodiment include：Fan reduction of speed.Fan reduction of speed：Start fan
Reduction of speed, according to setting fan reduction of speed ratio, in the PWM duties of fan reduction of speed ratio reduction fan on the basis of existing rotation speed of the fan
Than reducing rotation speed of the fan；
Perform step S101, temperature detection：Detection battery or battery core temperature simultaneously record；
Circulated with this, until fan is stopped or power-off.
Further, it is preferred that after the execution fan reduction of speed step of the present embodiment, perform step S123 delay steps：Delay
After setting time delay y, temperature detection step is performed.
Further, the cooling system reduction of speed of the present embodiment also includes：Water pump reduction of speed.
Step S118 is performed, after fan reduction of speed, is performed
Step S101, temperature detection：Detection battery or battery core temperature simultaneously record,
Step S103, temperature judge：Battery or battery core temperature are judged whether in hot operation temperature range,
If battery or battery core temperature Current Temperatures are less than the minimum temperature of hot operation temperature range, perform
Low temperature judges：Low temperature judges：Judge battery or battery core temperature Current Temperatures whether in the low-temperature working temperature model set
In enclosing,
If in low-temperature working temperature range, and fan is stopped or power-off,
Then perform water pump reduction of speed：According to the current rotating speed of water pump, dropped in the PWM duty cycle of the reduction of speed ratio reduction water pump of setting
Low pump rotary speed,
Performed after water pump reduction of speed step
Step S101, temperature detection：Detection battery or battery core temperature simultaneously record,
Step S103, temperature judge：Battery or battery core temperature are judged whether in hot operation temperature range,
If battery or battery core temperature Current Temperatures are less than the minimum temperature of hot operation temperature range, perform
Low temperature judges：Battery or battery core temperature Current Temperatures are judged whether in the low-temperature working temperature range set,
If in low-temperature working temperature range, water pump reduction of speed is performed：According to the current rotating speed of water pump, by the reduction of speed ratio of setting
The PWM duty cycle of example reduction water pump reduces pump rotary speed.
Circulated with this until water pump is stopped or pump power shut-off.
After water pump reduction of speed step, S123 is performed, postpones step：After delay setting time delay y, temperature detection step is performed
Suddenly.
It is straight if the minimum temperature of battery or battery core temperature less than low-temperature working temperature range is judged if low temperature judgment step
Connect the power supply for controlling all cooling system such as water pumps and fan to be stopped or cut off cooling system；And perform
Step S121, heating：Control firing equipment heats to battery, and according to different temperatures perform different heating gear,
Or according to setting ratio, the heating power of firing equipment is scaled；
Step S101, temperature detection are performed after heating stepses：Detection battery or battery core temperature simultaneously record.
In the present embodiment, heating stepses include：First heating.First heating：If judging, battery or battery core temperature are in the
One low temperature range as b DEG C-(b-p) DEG C if control that firing equipment performs the first heating power or the first gear is heated.This reality
Apply in example, p is preferably 5 DEG C.
Preferably, if judging, battery or battery core temperature are in b DEG C-b-5 DEG C, and control firing equipment performs the first heating work(
Rate or the first gear are heated.
In the present embodiment, heating stepses also include：Second heating.Second heating：If judging, battery or battery core temperature are in
Second low temperature range (b-p) DEG C-(b-q) DEG C, then control firing equipment to perform the second heating power and heated.Preferably,
The q of the present embodiment is preferably 10 DEG C.
Preferably, if judging, battery or battery core temperature are in（b-5）℃-（b-10）DEG C, then control firing equipment to perform the
Two heating powers are heated.
In the present embodiment, heating stepses also include：3rd heating.3rd heating：If judging, battery or battery core temperature are less than
Such as less than b-10 DEG C minimum of the low temperature (b-q) DEG C of setting, then control firing equipment to perform the 3rd heating power and heated.
Certainly, heating stepses can also set more heated perimeters and grade as needed, and firing equipment is set as needed
Different grades of heating power, or heating power is scaled.
In the present embodiment, it is preferred that firing equipment uses PTC（Positive Temperature Coefficient are just
Temperature coefficient）, refer to positive temperature coefficient very big semi-conducting material or component.Further, preferably positive temperature coefficient
Thermistor, abbreviation PTC thermistor.PTC heating powers set its heating power according to setting operating current.Monitor battery
Or the temperature of battery core is less than such as 0 degree of the minimum temperature of low-temperature working temperature range, PTC switches are opened, and are based on different temperatures value,
Adjust PTC power gears.Preferably, if the temperature of battery or battery core is less than the first low temperature, and in the first low temperature range, then control
PTC power processed is adjusted on the first gear；If the temperature of battery or battery core is less than the second low temperature, and in the second low temperature range,
Then control PTC power is adjusted on the second gear；The temperature of battery or battery core is less than the 3rd low temperature, and in the 3rd low temperature range
It is interior, then control PTC power to be adjusted in third gear.
Heat management is carried out to electric automobile in order to energy-efficient, expresses battery power temperature exactly, the present embodiment is adopted
It is monitored with the temperature of detection battery core.
As shown in figure 3, further, the electric car thermal management algorithm of one embodiment of the present invention, comprise the following steps：
Step 301, temperature detection：BMS（Battery management system）Scanning battery core temperature simultaneously records,
Step 303：Judge whether battery core temperature is more than minimum hot operation temperature range temperature a,
If battery core temperature is more than minimum hot operation temperature range temperature a, perform
Step 305：Judge whether battery core temperature is more than highest hot operation temperature range temperature a+m,
If judgement is no, perform
Step 307, temperature compares：Compare the temperature of battery core Current Temperatures and last record,
If battery core Current Temperatures are more than the battery core temperature of last record, perform
Step 309, water pump cools：Start water pump, starting mode of pump rotating speed is c such as 30%PWM dutycycles；Controlled if water pump has been turned on
Water pump processed is raised speed in setting water pump speed-raising ratio d such as 5% PWM duty cycles,
Step 311：Delay such as 60 seconds time delay x of setting,
Perform step 301：BMS（Battery management system）Scanning battery core temperature simultaneously records, and updates battery core temperature；
And circulate successively, until pump rotary speed is adjusted to 100%PWM dutycycles.
If after performing the cooling of step 309 water pump, pump rotary speed is adjusted to 100%PWM dutycycle full-speed operations, then performs
Step 301：BMS（Battery management system）Scanning battery core temperature simultaneously records,
Step 303：Judge whether battery core temperature is more than minimum hot operation temperature range temperature a,
If battery core temperature is more than minimum hot operation temperature range temperature a, perform
Step 305：Judge whether battery core temperature is more than highest hot operation temperature range temperature a+m,
If judgement is no, perform
Step 307, temperature compares：Compare the battery core temperature of battery core Current Temperatures and last record,
If battery core Current Temperatures are more than the battery core temperature of last record, perform
Step 313, fan for cooling：Start fan, starting fan rotating speed is e such as 30%PWM dutycycles；Controlled if fan has been turned on
Fan processed is raised speed in setting fan speed-raising ratio f such as 5% PWM duty cycles,
Step 311, step is postponed：Delay such as 60 seconds time delay x of setting,
Perform step 301：BMS（Battery management system）Scanning battery core temperature simultaneously records, and updates battery core temperature；
And circulate successively, until rotation speed of the fan is adjusted to 100%PWM dutycycles.
Step 301：BMS（Battery management system）Scanning battery core temperature simultaneously records,
Step 303：Judge whether battery core temperature is more than minimum hot operation temperature range temperature a,
If judgement is no, perform
Step 315：Judge whether battery core temperature is less than the highest setting temperature a-n of low-temperature working temperature range,
If judgement is to perform
Step 317, judge whether battery core temperature is less than the lowest set temperature b of low-temperature working temperature range,
If judgement is no, perform
Step 319, fan reduction of speed：According to the current rotating speed of fan, the PWM of fan is reduced in the fan reduction of speed ratio such as 5% of setting
Dutycycle reduces rotation speed of the fan,
Step 321, step is postponed：Delay such as 60 seconds time delay y of setting,
Perform step 301：BMS（Battery management system）Scanning battery core temperature simultaneously records, and updates battery core temperature；
And circulate successively, until fan is stopped or fan power supply shut-off.
If after performing step 319 fan reduction of speed, fan is stopped or fan power supply shut-off, then performs
Step 301：BMS（Battery management system）Scanning battery core temperature simultaneously records,
Step 303：Judge whether battery core temperature is more than minimum hot operation temperature range temperature a,
If judgement is no, perform
Step 315：Judge whether battery core temperature is less than the highest setting temperature a-n of low-temperature working temperature range,
If judgement is to perform
Step 317, judge whether battery core temperature is less than the lowest set temperature b of low-temperature working temperature range,
If judgement is no, perform
Step 320, water pump reduction of speed：According to the current rotating speed of water pump, the PWM of water pump is reduced in the water pump reduction of speed ratio such as 5% of setting
Dutycycle reduces pump rotary speed,
Step 321, step is postponed：Delay such as 60 seconds time delay y of setting,
Perform step 301：BMS（Battery management system）Scanning battery core temperature simultaneously records, and updates battery core temperature；
And circulate successively, until water pump is stopped or fan power supply shut-off.
If step 317, judging whether battery core temperature is less than the lowest set temperature b of low-temperature working temperature range,
If judgement is to perform
Step 323, the temperature range of battery core temperature is judged,
If battery core temperature is in such as b DEG C-b-5 DEG C of the first low temperature range, perform
Step 325, the first heating：Control PTC performs the first gear heating power and battery is heated,
If battery core temperature is in such as b-5 DEG C-b-10 DEG C of the second low temperature range, perform
Step 327, the second heating：Control PTC performs the second gear heating power and battery is heated,
If battery core temperature is in such as less than b-10 DEG C of the 3rd low temperature range, perform
Step 329, the 3rd heating：Control PTC performs third gear heating power and battery is heated,
After performing corresponding heating operation in corresponding temperature determination range, perform
Step 301：BMS（Battery management system）Scanning battery core temperature simultaneously records,
Step 303：Judge whether battery core temperature is more than minimum hot operation temperature range temperature a,
If judgement is no, perform
Step 315：Judge whether battery core temperature is less than the highest setting temperature a-n of low-temperature working temperature range,
If judgement is to perform
Step 317, judge whether battery core temperature is less than the lowest set temperature b of low-temperature working temperature range,
If judging, battery core temperature is less than the lowest set temperature b of low-temperature working temperature range, performs
Step 323, the temperature range of battery core temperature is judged；
... so circulation.
Step 317, judge whether battery core temperature is less than the lowest set temperature b of low-temperature working temperature range,
If judging, battery core temperature is less than the lowest set temperature b of low-temperature working temperature range,
Fan or water pump is controlled to be stopped or cut off fan or plugman immediately if fan or water pump are also in working condition
Make power supply,
And heating is performed, different brackets is performed according to the different temperature range of battery core or gear heats, i.e.,
Step 323, the temperature range of battery core temperature is judged,
If battery core temperature is in such as b DEG C-b-5 DEG C of the first low temperature range, perform
Step 325, the first heating：Control PTC performs the first gear heating power and battery is heated,
If battery core temperature is in such as b-5 DEG C-b-10 DEG C of the second low temperature range, perform
Step 327, the second heating：Control PTC performs the second gear heating power and battery is heated,
If battery core temperature is in such as less than b-10 DEG C of the 3rd low temperature range, perform
Step 329, the 3rd heating：Control PTC performs third gear heating power and battery is heated,
Step 301：BMS（Battery management system）Scanning battery core temperature simultaneously records.
If step 305：Judge whether battery core temperature is more than highest hot operation temperature range temperature a+m, judgement is then to hold
OK
Step 331, the temperature range of battery core temperature is judged,
If battery core temperature is in the first alarm temperature scope such as（a+m）℃-（a+15）DEG C, then perform
Step S333, the first early warning/alarm：All cooling system dynamical element such as water pumps and fan are controlled to be adjusted to 100%PWM
Dutycycle full-speed operation；
Step S333 is performed, is performed after the first early warning/alarm
Step 301：BMS（Battery management system）Scanning battery core temperature simultaneously records.
If battery core temperature is in such as a+15 DEG C-a+20 DEG C of the second alarm temperature scope, perform
Step S335, the second early warning/alarm：The power output of vehicle is limited, limitation output is carried out successively by setting restriction proportion；
After performing the second early warning of step S335/alarming step, perform
Step 301：BMS（Battery management system）Scanning battery core temperature simultaneously records,
Step 303：Judge whether battery core temperature is more than hot operation temperature range minimum temperature a,
If judgement is to perform
Step 305：Judge whether battery core temperature is more than highest hot operation temperature range temperature a+m,
If judgement is to perform
Step 331, the temperature range of battery core temperature is judged,
If battery core temperature is in such as a+15 DEG C-a+20 DEG C of the second alarm temperature scope, perform
Step S335, the second early warning/alarm：The power output of vehicle is limited, the defeated of vehicle is reduced successively by setting restriction proportion
Go out power and carry out limitation output.90% as limited 90% or present output power that output is full power first, such as sentence for the second time
Power-off core temperature be still within the second alarm temperature scope then limit power output be full power 80%, be for the third time full power
70% etc., the like.In the present embodiment, it is preferred that vehicle output power limit can be controlled by limiting output current
System.
If battery core temperature is in such as larger than a+20 DEG C of the 3rd alarm temperature scope, perform
Step S337, three early warning/alarm：Warning reminding.Control sends hydropac, reminds driver and occupant to leave
Automobile.
The electric car thermal management algorithm of the present invention, control makes battery core be operated in peace with minimum pump rotary speed and rotation speed of the fan
In the range of total temperature, water pump and rotation speed of the fan, the electric energy of the consumption of saving are reduced to greatest extent, while reduce work
Noise.The electric car thermal management algorithm of the present invention can be used in the battery thermal management of all electric automobiles, as long as not
Same product, different clients demand, different parameters in modification " software parameter design table ", you can complete, substantially increase BMS exploitations
Progress.
The cooling working strategies of the electric car thermal management algorithm of the present invention：Battery temperature raises, and initially enters pump working
Pattern, radiated by natural wind；Until water pump is adjusted to 100%PWM dutycycles, full load running.Battery temperature continues to raise
Fan start-up operation pattern is entered back into, rotating speed increases；When water pump and fan have reached maximum heat-sinking capability (rotating speed is maximum),
Battery temperature reaches threshold values, limits power output.Water pump fan accelerates mode of operation as follows:When startup pump working pattern
When, starting of pump station rotating speed is c (starting as 0), if scanning is still raising to battery temperature next time, increases rotating speed d every time,
Until battery temperature no longer raises;After pump rotary speed reaches 100% dutycycle, battery core temperature is also rising, and starts fan and turns
Speed is e (start for 0, adjusted since 0), if scanning is still raising to battery temperature next time, increase rotating speed f every time, directly
No longer raised to battery temperature.In the present embodiment, e is preferably 30%.
The energy conservation strategy of the electric car thermal management algorithm of the present invention：When battery temperature drops to below a-n, judge
Whether fan and water pump are being worked, and fan/water pump reduction of speed mode of operation is performed if in work.Water pump fan reduction of speed works
Pattern:When battery temperature drops to below a-n, performing fan reduces rotating speed d, scans battery core temperature next time still less than a-n,
Continue to reduce rotation speed of the fan, until closing fan power supply；If scanned when still detecting that battery temperature is less than a-n next time, drop
Low pump rotary speed f, battery core temperature is scanned next time still less than a-n, continues to reduce pump rotary speed, until the power supply that switches off the pump.
The heating work strategy of the electric car thermal management algorithm of the present invention：When temperature is in the first low temperature range such as<B,
PTC is heated using first grade of power；When temperature is in the second low temperature range such as<B-5 DEG C, PTC uses the second notch power
Heated.When temperature is in the 3rd low temperature range such as<b-10℃:PTC is heated using third gear power.When battery core temperature
Degree stops heating more than or equal to the lowest set temperature b, PTC of low-temperature working temperature range.
Early warning/alarm of the electric car thermal management algorithm of the present invention：When battery core temperature is in the first alarm temperature scope>a+
10℃:Yellow heat alert, and perform water pump and rotation speed of the fan 100% turns entirely；When battery core is in the second alarm temperature scope such as>a
+15℃:Red heat alert, and limit input and output and go out power；When battery core temperature is in the 3rd alarm temperature range temperature such as>
a+20℃:Automobile is left in buzzer hydropac, warning.
The normal mode of operation of the electric car thermal management algorithm of the present invention：BMS scans battery bag battery core temperature per the n seconds, when
Battery core temperature is not greater than a, and without a-n is less than, system does not perform any heat management measure yet.Judge whether battery core temperature is more than
A+m such as a+10C, if it is, performing early warning/alarm；It is more than a when detecting battery core temperature, but is not greater than a+m such as a+10C, then
Perform water pump fan and accelerate mode of operation；When detecting that battery core temperature is more than b, less than a-n, then water pump fan drop is performed
Fast mode of operation.
Using the electric car thermal management algorithm of the present invention, energy-conservation, noise reduction, comfort level is improved：Using minimum pump rotary speed
Battery core is operated in safe temperature range with rotation speed of the fan, reduce water pump and rotation speed of the fan to greatest extent, saving disappears
The electric energy of consumption, while reduce operating noise.The present invention can use one temperature value of setting, when battery core temperature has arrived this
Value, then start pump working.Battery bag heat management system of the electric car thermal management algorithm optimization of the present invention suitable for electric automobile
In system.
As shown in figure 4, a kind of electrombile thermal management system 100 of the present invention, including：
Temperature detecting module 20：Detection battery or battery core temperature simultaneously record, and are connected to
Temperature judge module 40：Battery or battery core temperature are judged whether in hot operation temperature range,
If without departing from hot operation temperature range, it is connected to
Temperature comparison module 60：Compare Current Temperatures and last temperature,
If Current Temperatures are more than last temperature, it is connected to
Cooling module 80：According to setting ratio, the dynamical element rotating speed of cooling system is scaled up,
And temperature detecting module 20 is connected to, until the dynamical element full-speed operation of cooling system.
As shown in figure 5, further, it is preferred that after cooling, error caused by temperature does not lower also immediately,
Or temperature error caused by temperature fluctuation changes, or system is unstable, the electrombile thermal management system 100 of the present embodiment, also wrap
Include Postponement module 85.
Cooling module 80 is connected to Postponement module 85, Postponement module after being scaled up the dynamical element rotating speed of cooling system
Temperature detecting module 20 is connected to after 85 delay setting time delays x.
Further, the cooling module 80 of the present embodiment includes：Water pump cooling module 82, fan for cooling module 84.Water pump drops
Warm module 82：According to current pump rotary speed, water pump is adjusted in the PWM duty cycle of the water pump speed-raising ratio raising water pump of setting
Rotating speed, and it is connected to temperature detecting module 20.
When the PWM duty cycle of water pump is adjusted to 100% full-speed operation, if temperature judge module judges battery or battery core temperature
In hot operation temperature range, and temperature comparison module 60 judges that Current Temperatures are then connected to fan drop more than last temperature
Warm module 84, fan for cooling module 84 are accounted for according to the current rotating speed of fan in the PWM of the fan speed-raising ratio raising fan of setting
Sky compares to adjust rotation speed of the fan, and is connected to temperature detecting module 20.
Further, it is preferred that the water pump cooling module 82 of the present embodiment improves water pump in the water pump speed-raising ratio of setting
After PWM duty cycle, Postponement module 85 is connected to, Postponement module 85 is connected to temperature detecting module after delay setting time delay x
20。
Further, it is preferred that the fan for cooling module 84 of the present embodiment improves fan in the fan speed-raising ratio of setting
After PWM duty cycle, Postponement module 85 is connected to, Postponement module 85 is connected to temperature detecting module after delay setting time delay x
20。
Temperature judge module 40 includes：Lowest temperature judge module 42, temperature upper limit judge module 44.
Lowest temperature judge module 42：Judge whether battery core temperature is more than hot operation temperature range minimum temperature a, if electric
Core temperature is more than minimum hot operation temperature range temperature a, then is connected to temperature upper limit judge module 44.
Temperature upper limit judge module 44：Judge whether battery core temperature is more than the maximum temperature a+m of hot operation temperature range,
If judgement is no, temperature comparison module 60 is connected to.
Further, the electrombile thermal management system 100 of the present embodiment also includes：Low-temperature working judge module 90, cooling are set
Make preparation for dropping fast module 30, Postponement module 35.
Connect if the battery core temperature that temperature judge module 40 judges to detect is less than minimum hot operation temperature range temperature a
It is connected to low-temperature working judge module 90：Judge whether battery core temperature is in low-temperature working temperature range.
Low-temperature working judge module 90 includes：Low temperature upper limit judge module 92, low temperature limits judge module 94.
Low temperature upper limit judge module 92：Judge whether battery core temperature is less than the highest setting temperature of low-temperature working temperature range
A-n, if it is to be connected to judge
Low temperature limits judge module 94：Judge whether battery core temperature is less than the lowest set temperature b of low-temperature working temperature range, if
Judge no, be then connected to cooling system reduction of speed module 30.
Cooling system reduction of speed module 30 includes：Fan reduction of speed module 32, water pump reduction of speed module 34.
If low temperature limits judge module 94 judges that battery core temperature is not less than the lowest set temperature of low-temperature working temperature range
B, then it is connected to fan reduction of speed module 32.
Fan reduction of speed module 32：According to the current rotating speed of fan, the PWM that fan is reduced in the reduction of speed ratio such as 5% of setting is accounted for
Sky compares to reduce rotation speed of the fan；And it is connected to Postponement module 35.
Postponement module 35：Delay such as 60 seconds time delay y of setting, it is connected to temperature detecting module 20.
If fan be stopped or fan power supply shut-off after, low temperature limits judge module 94 judge battery core temperature be not less than it is low
The lowest set temperature b of warm operating temperature range, then it is connected to water pump reduction of speed module 34.
Water pump reduction of speed module 34：According to the current rotating speed of water pump, the PWM that water pump is reduced in the reduction of speed ratio such as 5% of setting is accounted for
Sky compares to reduce pump rotary speed, and is connected to Postponement module 35, and Postponement module 35 is connected to temperature detecting module 20.
Further, the electrombile thermal management system 100 of the present embodiment also includes：Heating module 50.Further, the present embodiment
Heating module 50 include：Low temperature judge module 58, the first heating module 52, the second heating module 54, the 3rd heating module 56.
If low temperature limits judge module 94 judges that battery core temperature is less than the lowest set temperature b of low-temperature working temperature range,
Then it is connected to heating module 50.
Low temperature judge module 58：Judge that battery core temperature belongs to that a kind of low temperature of low temperature range.
If low temperature judge module 58 judges that battery core temperature is in such as b DEG C-b-5 DEG C of the first low temperature range, first is connected to
Heating module 52.First heating module 52：Control PTC performs the first gear heating power and battery is heated, and is connected to
Temperature detecting module 20 detects battery or battery core temperature and recorded.
If low temperature judge module 58 judges that battery core temperature is in such as b-5 DEG C-b-10 DEG C of the second low temperature range, is connected to
Two heating modules 54.Second heating module 54：Control PTC performs the second gear heating power and battery is heated, and connects
Battery or battery core temperature are detected to temperature detecting module 20 and are recorded.
If low temperature judge module 58 judges that battery core temperature is in such as less than b-10 DEG C of the 3rd low temperature range, the 3rd is connected to
Heating module 56.3rd heating module 56：Control PTC performs third gear heating power and battery is heated, and is connected to
Temperature detecting module 20 detects battery or battery core temperature and recorded.
Further, the electrombile thermal management system 100 of the present embodiment also includes：Early warning/alarm module 70.
If temperature upper limit judge module 44 judges that battery core temperature is more than the maximum temperature a+m of hot operation temperature range,
It is connected to early warning/alarm module 70.Early warning/alarm module 70 includes：High temperature judge module 72, the first early warning/alarm module 74,
Second early warning/alarm module 76, three early warning/alarm module 78.
High temperature judge module 72 judges the affiliated hyperthermia temperature range of battery core temperature.
If high temperature judge module 72 judges that detected battery core temperature is in the first alarm temperature scope such as（a+m）℃-（a+
15）DEG C, then it is connected to the first early warning/alarm module 74.First early warning/alarm module 74：Control all cooling system power members
Part such as water pump and the dutycycle full-speed operation of fan 100%, and be connected to temperature detecting module 20 and detect battery or battery core temperature and remember
Record.
If high temperature judge module 72 judges that detected battery core temperature is in the second alarm temperature scope such as a+15 DEG C of-a+
20 DEG C, then it is connected to the second early warning/alarm module 76.Second early warning/alarm module 76：The power output of vehicle is limited, by setting
The power output that definite limitation ratio reduces vehicle successively carries out limitation output, and be connected to temperature detecting module 20 detect battery or
Battery core temperature simultaneously records.
Second early warning/alarm module 76 limits the power output of vehicle, and such as limitation output first is the 90% of full power or worked as
The 90% of preceding power output, judge that battery core temperature limits power output if being still within the second alarm temperature scope and is such as second
The 80% of full power, it is for the third time 70% of full power etc., the like.In the present embodiment, it is preferred that vehicle output power limit
It can be controlled by limiting output current.
If high temperature judge module 72 judges that detected battery core temperature is in such as larger than a+20 DEG C of the 3rd alarm temperature scope,
Then it is connected to three early warning/alarm module 78.Three early warning/alarm module 78：Warning reminding.Control sends hydropac, carries
Awake driver and occupant leave automobile.
Embodiment described above only expresses the several embodiments of the present invention, and its description is more specific and detailed, but simultaneously
Therefore the limitation to the scope of the claims of the present invention can not be interpreted as.It should be pointed out that for one of ordinary skill in the art
For, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to the guarantor of the present invention
Protect scope.Therefore, the protection domain of patent of the present invention should be determined by the appended claims.
Claims (10)
1. a kind of electric car thermal management algorithm, it is characterised in that comprise the following steps：
Temperature detection：Detection battery or battery core temperature simultaneously record,
Temperature judges：Battery or battery core temperature are judged whether in hot operation temperature range,
If without departing from hot operation temperature range, perform
Temperature compares：Comparative cell or the Current Temperatures of battery core and last detection temperature,
If Current Temperatures are more than last detection temperature, perform
Cooling：According to the current rotating speed of cooling system dynamical element, in the dynamical element of setting adjustment ratio raising cooling system
Rotating speed；
Repeat the above steps until the dynamical element full-speed operation of cooling system.
2. electric car thermal management algorithm according to claim 1, it is characterised in that：The cooling includes：Water pump cools：Root
According to current pump rotary speed, pump rotary speed is adjusted in the PWM duty cycle of the water pump speed-raising ratio raising water pump of setting.
3. electric car thermal management algorithm according to claim 2, it is characterised in that：The cooling also includes：Fan for cooling：
When the PWM duty cycle of water pump is adjusted to 100% full-speed operation, start fan work if judging that Current Temperatures are more than last temperature
Make, update battery or battery core temperature；If battery or battery core temperature continue to raise, according to the current rotating speed of fan, by setting
The PWM duty cycle that fan speed-raising ratio improves fan adjusts rotation speed of the fan.
4. electric car thermal management algorithm according to claim 1, it is characterised in that：Also include delay, perform the cooling
After step, after the time delay for performing delay step delay setting, temperature detection step is performed；If in temperature comparison step, electricity
Pond or battery core temperature are in hot operation temperature range, and Current Temperatures then perform temperature detection equal to or less than last temperature
Step；Also include：Cooling system starts：After vehicle launch, if detecting, battery or battery core temperature are more than the cooling system of setting
Start-up temperature, then start cooling system.
5. the electric car thermal management algorithm according to Claims 1-4 any one, it is characterised in that：Also include：Early warning/
Alarm；If in temperature judgment step, battery or battery core Current Temperatures then perform more than the maximum temperature of hot operation temperature range
Early warning/alarm：If judging Current Temperatures in the range of the first alarm temperature, all cooling system dynamical elements are controlled
100%PWM dutycycle full-speed operations.
6. electric car thermal management algorithm according to claim 5, it is characterised in that：Early warning/the alarm includes：Second is pre-
Police/alarm：If judging, Current Temperatures are more than the second alarm temperature and in the range of the second alarm temperature, limit the output of vehicle
Power, reduce the power output of vehicle successively by setting ratio or setting grade；Early warning/the alarm also include the 3rd early warning/
Alarm：If judging, Current Temperatures are more than the 3rd alarm temperature, warning reminding.
7. the electric car thermal management algorithm according to Claims 1-4 any one, it is characterised in that：If temperature judges step
Judge that battery or battery core temperature Current Temperatures are less than the minimum temperature of hot operation temperature range in rapid, then perform
Low temperature judges：Battery or battery core temperature Current Temperatures are judged whether in the low-temperature working temperature range set,
If in low-temperature working temperature range, perform
Cooling system reduction of speed：If cooling system is in running order, according to the current rotating speed of the dynamical element of cooling system, by setting
Fixed reduction of speed ratio reduces the dynamical element rotating speed of cooling system,
Performed after cooling system reduction of speed step
Temperature detection：Detection battery or battery core temperature simultaneously record；
Temperature judges：Battery or battery core temperature are judged whether in hot operation temperature range,
If battery or battery core temperature Current Temperatures are less than the minimum temperature of hot operation temperature range, perform
Low temperature judges：Battery or battery core temperature Current Temperatures are judged whether in the low-temperature working temperature range set,
If judging, battery or battery core temperature Current Temperatures are in the low-temperature working temperature range of setting, are performed
Cooling system reduction of speed：If cooling system is in running order, according to the current rotating speed of the dynamical element of cooling system, by setting
Fixed reduction of speed ratio, reduce the dynamical element rotating speed of cooling system；
So circulation is until cooling system is stopped or cooling system power-off；
If in low temperature judgment step, judge that battery or battery core temperature Current Temperatures are less than the lowest temperature of low-temperature working temperature range
Degree, control cooling system to be stopped if cooling is set also in working condition, perform
Heating stepses：Control firing equipment battery is heated, and according to different temperatures perform different heating gear or according to
Setting ratio adjusts the heating power of firing equipment,
Temperature detection is performed after heating stepses：Detection battery or battery core temperature simultaneously record.
8. electric car thermal management algorithm according to claim 7, it is characterised in that：The cooling system reduction of speed includes：
Fan reduction of speed：Start fan reduction of speed, according to the current rotating speed of fan, the PWM that fan is reduced in the reduction of speed ratio of setting is accounted for
Sky compares to reduce rotation speed of the fan,
Performed after fan reduction of speed step
Temperature detection：Detection battery or battery core temperature simultaneously record,
Temperature judges：Battery or battery core temperature are judged whether in hot operation temperature range,
If battery or battery core temperature Current Temperatures are less than the minimum temperature of hot operation temperature range, perform
Low temperature judges：Battery or battery core temperature Current Temperatures are judged whether in the low-temperature working temperature range set,
If judging, battery or battery core temperature Current Temperatures are in the low-temperature working temperature range of setting, are performed
Fan reduction of speed：Start fan reduction of speed, according to the current rotating speed of fan, the PWM that fan is reduced in the reduction of speed ratio of setting is accounted for
Sky compares to reduce rotation speed of the fan,
So circulation, until fan is stopped or fan power supply is closed；
The cooling system reduction of speed also includes：Water pump reduction of speed,
If perform fan slow down after, fan be stopped or fan power supply close after, then perform
Temperature detection：Detection battery or battery core temperature simultaneously record；
Temperature judges：Battery or battery core temperature are judged whether in hot operation temperature range,
If battery or battery core temperature Current Temperatures are less than the minimum temperature of hot operation temperature range, perform
Low temperature judges：Battery or battery core temperature Current Temperatures are judged whether in the low-temperature working temperature range set,
If judging, battery or battery core temperature Current Temperatures are in the low-temperature working temperature range of setting, are performed
Water pump reduction of speed：According to the current rotating speed of water pump, water pump is reduced in the PWM duty cycle of the reduction of speed ratio reduction water pump of setting
Rotating speed,
Temperature detection：Detection battery or battery core temperature simultaneously record；
So circulation, until water pump is stopped or pump power is closed.
A kind of 9. electrombile thermal management system, it is characterised in that including：
Temperature detecting module：Detection battery or battery core temperature simultaneously record, and are connected to
Temperature judge module：Battery or battery core temperature are judged whether in hot operation temperature range,
If without departing from hot operation temperature range, it is connected to
Temperature comparison module：Compare Current Temperatures and last temperature,
If Current Temperatures are more than last temperature, it is connected to
Cooling module：According to setting ratio, the dynamical element rotating speed of cooling system is scaled up,
And temperature detecting module is connected to, until the dynamical element full-speed operation of cooling system.
10. electrombile thermal management system according to claim 9, it is characterised in that：The cooling module includes：Water pump drops
Warm module, fan for cooling module, the water pump cooling module：According to current pump rotary speed, in the water pump speed-raising ratio of setting
The PWM duty cycle for improving water pump adjusts pump rotary speed, and is connected to temperature detecting module；When the PWM duty cycle of water pump adjusts
To 100% full-speed operation, if temperature judge module judges battery or battery core temperature in hot operation temperature range, and temperature ratio
Judge that Current Temperatures are then connected to fan for cooling module more than last temperature compared with module, fan for cooling module is worked as according to fan
Preceding rotating speed, rotation speed of the fan is adjusted in the PWM duty cycle of the fan speed-raising ratio raising fan of setting, and be connected to temperature detection
Module.
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| CN112186306A (en) * | 2020-10-13 | 2021-01-05 | 湖北亿纬动力有限公司 | Heating method and heating device of battery system |
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| CN114179617A (en) * | 2021-12-10 | 2022-03-15 | 山东爱德邦智能科技有限公司 | Battery spontaneous combustion control method and device and medium thereof |
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