CN110329236A - Automobile power control method, system and automobile - Google Patents
Automobile power control method, system and automobile Download PDFInfo
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- CN110329236A CN110329236A CN201910617938.0A CN201910617938A CN110329236A CN 110329236 A CN110329236 A CN 110329236A CN 201910617938 A CN201910617938 A CN 201910617938A CN 110329236 A CN110329236 A CN 110329236A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W10/00—Conjoint control of vehicle sub-units of different type or different function
- B60W10/04—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units
- B60W10/06—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units including control of combustion engines
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W10/00—Conjoint control of vehicle sub-units of different type or different function
- B60W10/24—Conjoint control of vehicle sub-units of different type or different function including control of energy storage means
- B60W10/26—Conjoint control of vehicle sub-units of different type or different function including control of energy storage means for electrical energy, e.g. batteries or capacitors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W20/00—Control systems specially adapted for hybrid vehicles
- B60W20/10—Controlling the power contribution of each of the prime movers to meet required power demand
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W40/00—Estimation or calculation of non-directly measurable driving parameters for road vehicle drive control systems not related to the control of a particular sub unit, e.g. by using mathematical models
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W2510/00—Input parameters relating to a particular sub-units
- B60W2510/24—Energy storage means
- B60W2510/242—Energy storage means for electrical energy
- B60W2510/244—Charge state
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W2510/00—Input parameters relating to a particular sub-units
- B60W2510/24—Energy storage means
- B60W2510/242—Energy storage means for electrical energy
- B60W2510/246—Temperature
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W2710/00—Output or target parameters relating to a particular sub-units
- B60W2710/06—Combustion engines, Gas turbines
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W2710/00—Output or target parameters relating to a particular sub-units
- B60W2710/24—Energy storage means
- B60W2710/242—Energy storage means for electrical energy
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- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Automation & Control Theory (AREA)
- Physics & Mathematics (AREA)
- Mathematical Physics (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
The present invention provides a kind of automobile power control method, system and automobiles, are related to full-vehicle control field；Wherein, automobile power control method includes: acquisition vehicle operating parameter, wherein the vehicle operating parameter includes temperature of powered cell and power battery remaining capacity；Judge whether the power battery meets power battery drive condition according to the temperature of powered cell and the power battery remaining capacity；When the power battery meets power battery drive condition, controls the power battery and drive the automobile, or automobile described in the control power battery and the engine driving；When the power battery is unsatisfactory for power battery drive condition, automobile described in the engine driving is controlled.The embodiment of the present invention avoids power battery and puts electro-motive vehicle in the state of own temperature or low battery, cause energy waste that the defect of safety accident even occurs by exporting the definition that energy drives the control strategy of automobile to power battery and engine.
Description
Technical field
The present invention relates to full-vehicle control field more particularly to a kind of automobile power control methods, system and automobile.
Background technique
Pure electric automobile is influenced by battery energy density, and mileage travelled is denounced by user always；Develop hybrid power
On the one hand the recycling of energy may be implemented in automobile, improve fuel economy；On the other hand it solves in electric vehicle traveling
The problem of journey deficiency.
But current hybrid vehicle is when carrying out power battery and engine power output distributes, usually with the surplus of power battery
Remaining electricity is foundation, and does not consider power battery performance and be influenced by temperature.Conventional automobile power cell, such as lithium-ion electric
Electro-motive vehicle is put in pond at low ambient temperatures, and energy waste is on the one hand caused since discharge performance is bad, on the other hand, is also deposited
In security risk.
Summary of the invention
Technical problems to be solved of the embodiment of the present invention are to provide a kind of automobile power control method, system and automobile, use
Electro-motive vehicle is put at low ambient temperatures to solve automobile power cell, energy waste is caused since discharge performance is bad, and deposit
In the defect of security risk.
In order to solve the above technical problems, automobile power control method provided in an embodiment of the present invention, the automobile includes dynamic
Power battery and engine；
The described method includes:
Obtain vehicle operating parameter, wherein the vehicle operating parameter includes that temperature of powered cell and power battery are remaining
Electricity；
It is dynamic with the power battery remaining capacity to judge whether the power battery meets according to the temperature of powered cell
Power battery drive condition；
When the power battery meets power battery drive condition, controls the power battery and drive the automobile, or
Person controls automobile described in the power battery and the engine driving；
When the power battery is unsatisfactory for power battery drive condition, automobile described in the engine driving is controlled.
Optionally, described to judge whether the power battery meets with power battery remaining capacity according to temperature of powered cell
The step of power battery drive condition, comprising:
When the temperature of powered cell be not less than temperature threshold, and the power battery remaining capacity be not less than the first electricity
When threshold value, determine that the power battery meets power battery drive condition.
Optionally, described when the power battery meets power battery drive condition, control the power battery driving
The automobile, or the step of automobile described in the control power battery and the engine driving, comprising:
Judge whether the engine meets coordinated drive condition according to vehicle operating parameter；
When the engine meets the coordinated drive condition, the power battery and the engine driving institute are controlled
State automobile；
When the engine is unsatisfactory for the coordinated drive condition, controls the power battery and drive the automobile.
Optionally, the vehicle operating parameter further includes car speed and travel condition of vehicle information；
It is described that the step of whether engine meets coordinated drive condition is judged according to vehicle operating parameter, comprising:
When meeting at least one of following, determine that engine meets coordinated drive condition:
The power battery remaining capacity is lower than the second power threshold；
The car speed is higher than threshold speed；
Determine that the automobile is in upward slope or acceleration mode according to the travel condition of vehicle information.
Optionally, described when the power battery is unsatisfactory for power battery drive condition, control the engine driving
After the step of automobile, the method also includes at least one of following:
The engine is controlled to the power battery charging；
The engine is controlled to heat the power battery.
The embodiment of the invention also provides a kind of vehicle power control system, the automobile includes power battery and start
Machine；
The system comprises:
Parameter acquisition module, for obtaining vehicle operating parameter, wherein the vehicle operating parameter includes power battery temperature
Degree and power battery remaining capacity；
First judgment module, it is described dynamic for being judged according to the temperature of powered cell and the power battery remaining capacity
Whether power battery meets power battery drive condition；
Drive control module, for controlling the power electric when the power battery meets power battery drive condition
Pond drives the automobile, or automobile described in the control power battery and the engine driving；When the power battery not
When meeting power battery drive condition, automobile described in the engine driving is controlled.
Optionally, the first judgment module includes:
First judging unit, for being not less than temperature threshold when the temperature of powered cell, and the power battery is remaining
When electricity is not less than the first power threshold, determine that the power battery meets power battery drive condition.
Optionally, the drive control module includes:
Second judgment unit judges whether the engine meets coordinated drive item according to vehicle operating parameter for judging
Part；
Drive control unit, for controlling the power battery when the engine meets the coordinated drive condition
With automobile described in the engine driving；When the engine is unsatisfactory for the coordinated drive condition, the power electric is controlled
Pond drives the automobile.
Optionally, the vehicle operating parameter further includes car speed and travel condition of vehicle information；
The second judgment unit includes:
Second judgment sub-unit, for when meeting at least one of following, determining that engine meets coordinated drive condition:
The power battery remaining capacity is lower than the second power threshold；
The car speed is higher than threshold speed；
Determine that the automobile is in upward slope or acceleration mode according to the travel condition of vehicle information.
Optionally, further include at least one of following:
Charge control module, for controlling the engine to the power battery charging；
Heating control module heats the power battery for controlling the engine.
Optionally, the power battery includes supercapacitor, the first battery and inverter；
Wherein, it connects after the supercapacitor is in parallel with first battery with the inverter.
The embodiment of the invention also provides a kind of automobiles, including above-mentioned vehicle power control system.
The embodiment of the present invention is kept away by exporting the definition that energy drives the control strategy of automobile to power battery and engine
Exempt from power battery and put electro-motive vehicle in the state of own temperature or low battery, causes energy waste that safety even occurs
The defect of accident.Can also select that engine is operated alone, power battery is operated alone or power battery and engine simultaneously
The mode of driving adapts to the different operating condition of automobile.
Detailed description of the invention
Fig. 1 is a kind of flow chart of automobile power control method provided in an embodiment of the present invention；
Fig. 2 is the flow chart of another automobile power control method provided in an embodiment of the present invention；
Fig. 3 is first concrete application example flow chart of automobile power control method provided in an embodiment of the present invention；
Fig. 4 is second concrete application example flow chart of automobile power control method provided in an embodiment of the present invention；
Fig. 5 is power battery provided in an embodiment of the present invention and a kind of energy output distribution schematic diagram of engine；
Fig. 6 is power battery provided in an embodiment of the present invention and engine another kind energy output distribution schematic diagram；
Fig. 7 is a kind of structural schematic diagram of vehicle power control system provided in an embodiment of the present invention；
Fig. 8 is the structural schematic diagram of another vehicle power control system provided in an embodiment of the present invention；
Fig. 9 is the structural schematic diagram of automobile provided in an embodiment of the present invention.
Specific embodiment
To keep the technical problem to be solved in the present invention, technical solution and advantage clearer, below in conjunction with attached drawing and tool
Body embodiment is described in detail.In the following description, such as specific configuration is provided and the specific detail of component is only
In order to help comprehensive understanding the embodiment of the present invention.It therefore, it will be apparent to those skilled in the art that can be to reality described herein
Example is applied to make various changes and modifications without departing from scope and spirit of the present invention.In addition, for clarity and brevity, it is omitted pair
The description of known function and construction.
In automobile power control method provided in an embodiment of the present invention, the automobile includes power battery and engine；
As shown in Figure 1, which comprises
Step S110 obtains vehicle operating parameter, wherein the vehicle operating parameter includes temperature of powered cell and power
Battery dump energy；
Temperature of powered cell can be measured by the temperature to power battery ontology and be obtained, and stood or stablized for a long time in automobile
Under operating status, the temperature of the power battery local environment detected can also be used as temperature of powered cell.Power battery is remaining
Electricity, i.e. the state-of-charge SOC of power battery, can be measured, such as Current integrating method, discharge test by the prior art
Method, open circuit voltage method, Kalman filtering method etc..
Step S120 judges that the power battery is with the power battery remaining capacity according to the temperature of powered cell
It is no to meet power battery drive condition；
Existing battery powered by conventional energy, such as lithium ion battery, charge-discharge performance is poor at low ambient temperatures, be easy to cause energy
Source waste, or even safety accident occurs.Power battery is lower or when exhausting in electricity, then can not export enough energy and realize to vapour
The driving of vehicle.Therefore, the embodiment of the present invention has comprehensively considered temperature of powered cell and power battery remaining capacity, current to judge
Whether power battery meets power battery drive condition.
Step S130 controls power battery driving institute when the power battery meets power battery drive condition
State automobile, or automobile described in the control power battery and the engine driving；
That is, when power battery meets power drive condition, that is, controlling power battery pair in the embodiment of the present invention
Automobile is driven, and to improve the utilization efficiency of energy, reduces pollutant emission.Under some conditions, such as hereinafter it mentions
Power battery SOC is lower or engine can control power battery and engine under the operating conditions such as high-efficiency operation
Automobile is driven simultaneously.
Step S140 controls the engine driving institute when the power battery is unsatisfactory for power battery drive condition
State automobile.
In the embodiment of the present invention, when temperature of powered cell is too low or power battery low battery, then power electric is assert
Pond is unsatisfactory for power battery drive condition, in case the operation due to power battery adversely affects, for example, dynamic for lithium ion
Power battery is run in the environment of being lower than 0 DEG C, and effective discharge capacity and effective discharge energy can all significantly decrease, and
And the electrolyte of inside battery is easy to happen crystalline polamer, to puncture the diaphragm of inside battery, and then safety accident occurs,
Therefore optionally, temperature of powered cell can be used as one of power battery drive condition not less than 0 DEG C.Power battery low battery
When, not can guarantee power battery to the normal driving of automobile, therefore also should be avoided power battery in low battery to automobile into
Row driving.In the case where power battery is unsatisfactory for power battery drive condition, to realize the driving to automobile, it can be used and start
Machine individually exports energy in a manner of driving automobile, will further elaborate hereinafter.
Automobile power control method provided in an embodiment of the present invention, by exporting energy driving to power battery and engine
The definition of the control strategy of automobile avoids power battery and puts electro-motive vehicle in the state of own temperature or low battery,
Cause energy waste that the defect of safety accident even occurs.Engine can also be selected to be operated alone, power battery is operated alone,
Or the mode that power battery and engine drive simultaneously, adapt to the different operating condition of automobile.
It is described that whether the power battery is judged according to temperature of powered cell and power battery remaining capacity in the present embodiment
The step of meeting power battery drive condition, comprising: when the temperature of powered cell is not less than temperature threshold, and the power electric
When pond remaining capacity is not less than the first power threshold, determine that the power battery meets power battery drive condition.
In an alternative embodiment, above-mentioned temperature threshold is set as 0 DEG C, and the first power threshold is set as power battery capacitor
The 30% of amount.Such as the appropriate working temperature of the power battery of lithium ion battery is generally at 0 DEG C or more, not by temperature of powered cell
Lower than 0 DEG C as one of power battery drive condition is met, it can be avoided power battery and run at low ambient temperatures.Further may be used
Choosing, other temperature such as 5 DEG C, 8 DEG C also can be set into temperature threshold, more preferably fill so that power battery is at
Battery working performance is improved in discharge temp section.In addition, temperature threshold can also be carried out according to the type and feature of power battery
Selection, for low temperature power battery, temperature threshold also be can be set at 0 DEG C or less.
When power battery is as the energy source for driving automobile, generally requires with enough energy and power, work as power electric
When the SOC in pond is lower, output power also can be reduced accordingly, and then cause the driving force to automobile insufficient, influence automobilism
Stability, therefore power battery remaining capacity is greater than the 30% of power battery capacitance also as meeting power electric by the present embodiment
One of pond drive condition.It is further alternative, the first power threshold may be set to be power battery capacitance 20%,
25%, the other values such as 35% specifically can be necessary according to the SOC of power battery, voltage, power relation and Automobile drive
Power determines the first power threshold.
Temperature of powered cell deterministic process can carry out simultaneously in no particular order with power battery electricity deterministic process, can also
To determine whether temperature of powered cell not less than after temperature threshold, then is not less than the first electricity threshold to power battery remaining capacity
Value is judged.It is using the advantage of latter means, when automobile power cell temperature is too low, directly it can be heated,
Until after temperature of powered cell is not less than temperature threshold, then more accurate detection is carried out to power battery remaining capacity；And if
When detecting power battery remaining capacity first and detecting low battery, it is also necessary to whether not low continue to test temperature of powered cell
In temperature threshold, if being lower than temperature threshold, also need to consider to cause detection inaccurate since power battery performance is poor under cryogenic conditions
True problem, but also after temperature of powered cell need to being risen to temperature threshold or more, just properly continue charging operations.It is related
The mode of power battery heating will be explained in below.
As shown in Fig. 2, in the embodiment of the present invention, step S130, when the power battery meets power battery drive condition
When, it controls the power battery and drives the automobile, or automobile described in the control power battery and the engine driving,
Include the following steps:
Step S131 judges whether the engine meets coordinated drive condition according to vehicle operating parameter；
Step S132 controls the power battery and the hair when the engine meets the coordinated drive condition
Motivation drives the automobile；
Step S133 controls power battery driving institute when the engine is unsatisfactory for the coordinated drive condition
State automobile.
Specifically, the vehicle operating parameter further includes car speed and travel condition of vehicle information；
Wherein, step S132 controls the power battery and institute when the engine meets the coordinated drive condition
State automobile described in engine driving, comprising:
When meeting at least one of following, determine that engine meets coordinated drive condition:
The power battery remaining capacity is lower than the second power threshold；
The car speed is higher than threshold speed；
Determine that the automobile is in upward slope or acceleration mode according to the travel condition of vehicle information.
Specifically, when power battery remaining capacity is lower than the second power threshold, engine and power battery are needed simultaneously
Energy is exported, engine can at least charge to power battery when exporting energy, to guarantee that power battery can continue
It exports energy and drives automobile.
On the basis of above-described embodiment disclosure, in the present embodiment, while it being provided with the first power threshold and second
Power threshold, and the second power threshold is greater than the first power threshold.For example, the first power threshold is power battery capacitance
30%, the second power threshold is the 50% of power battery capacitance, at this point, under the premise of meeting temperature threshold, power battery
Operational process can summarize are as follows: when the SOC of power battery be lower than 30% when, power battery not as driving automobile energy
Source, engine are operated alone automobile and charge to power battery；When the SOC of power battery not less than 30% and is lower than 50%
When, power battery and engine are collectively as the energy source for driving automobile, while engine also charges to power battery；When
The SOC of power battery is not less than 50%, and when engine is unsatisfactory for other coordinated drive conditions, power battery is separately as driving
The energy source of automobile.
Optionally, when the SOC of power battery not less than 30% and be lower than 50% when, be also possible to power battery separately as
The energy source of automobile is driven, and engine is used only for power battery charging.
Still optionally further, it is additionally provided with third power threshold, when engine is in the state to power battery charging,
Until engine stop is to power battery charging when the SOC of power battery is not less than third power threshold.Third power threshold is big
In the second power threshold, optionally, third power threshold is power battery capacitance, and certain third power threshold can also basis
Actual needs is selected.In actual motion, if the SOC of power battery is not less than the second power threshold and is lower than third electricity threshold
When value, power battery keeps current charging or uncharged state.
When car speed is higher than threshold speed, one side engine itself can reach the high-efficiency operation stage, another
Aspect, power battery is higher as Automobile drive energy source power, therefore drives automobile simultaneously using power battery and engine
Mode.Optionally, above-mentioned threshold speed is 80km/h, and certainly, which can also be adjusted according to actual needs.
Optionally, when car speed is higher than threshold speed, engine operation simultaneously supplements energy to power battery.
Determine that the automobile is in upward slope or acceleration mode, i.e. vehicle are currently at according to the travel condition of vehicle information
When upward slope or the driving status accelerated, vehicle can be driven simultaneously with power battery by engine, in order to provide enough
Power.Above-mentioned travel condition of vehicle information can be counted such as vehicle torque, car speed by what is obtained to onboard sensor
According to processing obtain, the road conditions or car speed of current driving road segment can also be obtained from internet by mobile unit
Variation and obtain.
Acceleration mode can be by the change rate of car speed, i.e. vehicle acceleration determines.Optionally, when vehicle accelerates
Degree is timing, determines that automobile is in acceleration mode.To avoid the variation due to car speed that engine is caused frequently to open pass
It closes, in an alternative embodiment, can determine that automobile is in acceleration mode when vehicle acceleration is higher than a given threshold；Alternatively,
After the duration that the state that vehicle acceleration is positive persistently is set, determine that automobile is in acceleration mode.
Optionally, when determining that the automobile is in on-position according to the travel condition of vehicle information, power electric is controlled
Pond carries out energy regenerating, to improve capacity usage ratio.
In the above embodiment of the present invention, the energy source of power battery and engine as vehicle, control vehicle starting,
The processes such as drive at a constant speed, accelerate.Analysis power battery and the influence factor that uses of engine mainly include temperature of powered cell with
Remaining capacity, car speed, comprehensive road condition.By analyzing these influence factors, integrated vehicle control tactics, power electric are defined
Pond and engine can work independently, and can work together.
Specifically, in conjunction with vehicle operating parameter, integrated vehicle control tactics is formulated, power electric can be passed through in low speed/idling
Energy needed for pond work provides, in acceleration/high speed, engine is in high efficiency stage running.Pass through determining for integrated vehicle control tactics
Justice makes power battery and engine play sharpest edges, energy efficiency utilization rate highest.
In the embodiment of the present invention, in step S140, when the power battery is unsatisfactory for power battery drive condition, control
Further include at least one of following after automobile described in the engine driving:
The engine is controlled to the power battery charging；
The engine is controlled to heat the power battery.
Specifically, power battery be unsatisfactory for the case where power battery drive condition it is usual there are two types of, first is that power battery temperature
Spend lower, charge-discharge performance is poor；Second is that power battery remaining capacity is insufficient, it is understood that there may be the feelings of output power can not be stablized
Condition.For the previous case, controllable engine heats power battery while driving automobile；For latter feelings
Condition then can control engine while driving automobile to power battery charging.
Optionally, power battery is equipped with heating battery, and the heating battery has good charge and discharge at low ambient temperatures
Electrical property can export energy and heat to power battery when temperature of powered cell is lower.
Optionally, the above-mentioned automobile power control method of the present invention can be applied not only to the energy distribution to Automobile drive
In, it can also be applied in the energy distribution to vehicle-mounted electrical appliance.Certainly, the energy method of salary distribution of vehicle-mounted electrical appliance can not also
It is same as the energy method of salary distribution of Automobile drive, for example, the power of vehicle-mounted electrical appliance is relatively low, is lower than in the SOC of power battery
When 30%, power battery still can be used to vehicle-mounted electric power supply.
The concrete application process of the automobile power control method of the embodiment of the present invention is illustrated below.
As shown in figure 3, automobile starts when environment temperature is lower than 0 DEG C in application examples one, power battery is due to charge and discharge electrical property
Can be poor, be not suitable for directly output energy to Automobile drive.At this point, the process of the application example are as follows:
Step S11: control battery provides startup power, drives engine operation to provide energy for running car by starter
Amount；
Step S12: engine heats power battery, reaches power battery using temperature；
Step S13: control power battery provides energy as energy source for running car.
After step s 13, it can be run according to the content in foregoing embodiments according to power battery remaining capacity, vehicle
The parameters such as status information continue to control the energy distribution of engine and power battery.
As shown in figure 4, automobile starts at 0 DEG C of environment temperature or more, specific process in application examples two are as follows:
Step S21: control power battery provides energy as energy source for running car；
Step S22: when car speed is not less than threshold speed, i.e., when automobile switchs to high speed driving from low-speed running state
After state, engine collaborative work request signal is generated；
Step S23: it according to engine collaborative work request signal, controls battery and startup power is provided, by starter band
Dynamic engine operation, and control engine and provide energy jointly with power battery for running car.
The output of the energy of engine and power battery can be found in Fig. 5 with distribution in application examples one and application examples two.
Application examples three has further contemplated the remaining capacity (corresponding SOC) of power battery on the basis of application examples two.
Fig. 6 illustrates the output of the energy of engine and power battery and distribution in application examples three.Specifically, when automobile is in 0 DEG C or more temperature
When degree starting, and power battery electricity is sufficient (SOC >=30%), provides energy as energy source by power battery for running car
Amount.And when car speed >=80km/h (SOC < 50% or) starting engine operation in due course is defined, and supplement to power battery
Electricity.
In addition, defining power battery, engine in the Accelerating Traveling of Automobiles or upward slope and exporting energy simultaneously；Work as automobile
Power battery recovers energy when braking, improves capacity usage ratio.
As shown in fig. 7, the automobile includes power electric the embodiment of the invention also provides a kind of vehicle power control system
Pond 300 and engine 400；
The system comprises:
Parameter acquisition module 210, for obtaining vehicle operating parameter, wherein the vehicle operating parameter includes power electric
300 temperature of pond and 300 remaining capacity of power battery；
First judgment module 220, for judging institute according to the temperature of powered cell and the power battery remaining capacity
State whether power battery 300 meets power battery drive condition；
Drive control module 230, for when the power battery 300 meets power battery drive condition, described in control
Power battery 300 drives the automobile, or the control power battery 300 to drive the automobile with the engine 400；When
When the power battery 300 is unsatisfactory for power battery drive condition, controls the engine 400 and drive the automobile.
Vehicle power control system provided in an embodiment of the present invention, by exporting energy to power battery 300 and engine 400
The definition of the control strategy of amount driving automobile, avoids power battery 300 and discharges in the state of own temperature or low battery
Vehicle is driven, causes energy waste that the defect of safety accident even occurs.Engine 400 can also be selected to be operated alone, power
The mode that battery 300 is operated alone or power battery 300 and engine 400 drive simultaneously adapts to the different operation work of automobile
Condition.
Optionally, as shown in figure 8, the first judgment module 220 includes:
First judging unit 221, for being not less than temperature threshold when the temperature of powered cell, and the power battery is surplus
When remaining electricity is not less than the first power threshold, determine that the power battery 300 meets power battery drive condition.
Optionally, the drive control module 230 includes:
Second judgment unit 231 judges whether the engine 400 meets collaboration according to vehicle operating parameter for judging
Drive condition；
Drive control unit 232, it is described dynamic for controlling when the engine 400 meets the coordinated drive condition
Power battery 300 and the engine 400 drive the automobile；When the engine 400 is unsatisfactory for the coordinated drive condition,
It controls the power battery 300 and drives the automobile.
Optionally, the vehicle operating parameter further includes car speed and travel condition of vehicle information；
The second judgment unit 231 includes:
Second judgment sub-unit, for when meeting at least one of following, determining that engine 400 meets coordinated drive item
Part:
The power battery remaining capacity is lower than the second power threshold；
The car speed is higher than threshold speed；
Determine that the automobile is in upward slope or acceleration mode according to the travel condition of vehicle information.
Optionally, vehicle power control system further includes at least one of following:
Charge control module 240 charges to the power battery 300 for controlling the engine 400；
Heating control module 250 heats the power battery 300 for controlling the engine 400.
In the embodiment of the present invention, the power battery 300 includes supercapacitor 320, the first battery and inverter
330；Wherein, it connects after the supercapacitor 320 is in parallel with first battery with the inverter 340.Optionally, described
First battery is lithium ion battery 310, and lithium ion battery 310 has the advantages that high-energy density, but its power-performance is insufficient,
320 power characteristic of supercapacitor is better than lithium ion battery 310, but its energy-storage property is insufficient.By supercapacitor 320 and lithium
Power battery voltage is increased by the boosting of inverter 330 after 310 parallel connection of ion battery, obtains high power, high-energy
Power battery 300.
The embodiment of the present invention is passed through inverse using the high power characteristic of super capacitor, the high energy density characteristic of lithium ion battery
Become the boosting of device, the excellent power battery of combination forming properties.And it is defined by control strategy so that power battery, starting
The capacity usage ratio of machine is optimal.
The embodiment of the invention also provides a kind of automobiles, including above-mentioned vehicle power control system 200.As shown in figure 9,
The automobile further includes power battery 300, engine 400, motor 500 and power separating device 600.
The power battery 300 includes supercapacitor 320, the first battery and inverter 330；Wherein, described super
It connects after capacitor 320 is in parallel with first battery with the inverter 340.Optionally, first battery is lithium ion
Battery 310.
The engine 400 is equipped with starter 410 and the second battery, wherein the second battery is chosen as such as lead-acid battery
Battery 420, can also guarantee that there is preferable discharge performance at low ambient temperatures using low temperature lithium battery etc..?
In application process, startup power can be provided by battery 420, drive the work of engine 400 to mention for running car by starter 410
For energy.
Power battery 300 and engine 400 are connected to motor 500 by power separating device 600, in automobile power control
Under the control of system 200 processed, power battery 300 and/or engine 400 export energy under the running environment of setting to drive
Motor 500 operates.
The above is a preferred embodiment of the present invention, it is noted that for those skilled in the art
For, without departing from the principles of the present invention, several improvements and modifications can also be made, these improvements and modifications
It should be regarded as protection scope of the present invention.
Claims (12)
1. a kind of automobile power control method, which is characterized in that the automobile includes power battery and engine；
The described method includes:
Obtain vehicle operating parameter, wherein the vehicle operating parameter includes temperature of powered cell and power battery remaining capacity；
Judge whether the power battery meets power electric according to the temperature of powered cell and the power battery remaining capacity
Pond drive condition；
When the power battery meets power battery drive condition, controls the power battery and drive the automobile, or control
Make automobile described in the power battery and the engine driving；
When the power battery is unsatisfactory for power battery drive condition, automobile described in the engine driving is controlled.
2. automobile power control method according to claim 1, which is characterized in that described according to temperature of powered cell and dynamic
Power battery dump energy judges the step of whether power battery meets power battery drive condition, comprising:
When the temperature of powered cell be not less than temperature threshold, and the power battery remaining capacity be not less than the first power threshold
When, determine that the power battery meets power battery drive condition.
3. automobile power control method according to claim 1, which is characterized in that described to be moved when the power battery meets
When power battery drive condition, controls the power battery and the automobile, or the control power battery is driven to start with described
Machine drives the step of automobile, comprising:
Judge whether the engine meets coordinated drive condition according to vehicle operating parameter；
When the engine meets the coordinated drive condition, vapour described in the power battery and the engine driving is controlled
Vehicle；
When the engine is unsatisfactory for the coordinated drive condition, controls the power battery and drive the automobile.
4. automobile power control method according to claim 3, which is characterized in that the vehicle operating parameter further includes vehicle
Speed and travel condition of vehicle information；
It is described that the step of whether engine meets coordinated drive condition is judged according to vehicle operating parameter, comprising:
When meeting at least one of following, determine that engine meets coordinated drive condition:
The power battery remaining capacity is lower than the second power threshold；
The car speed is higher than threshold speed；
Determine that the automobile is in upward slope or acceleration mode according to the travel condition of vehicle information.
5. automobile power control method according to claim 1, which is characterized in that described when the power battery is unsatisfactory for
When power battery drive condition, after the step of controlling automobile described in the engine driving, the method also includes such as down toward
One item missing:
The engine is controlled to the power battery charging；
The engine is controlled to heat the power battery.
6. a kind of vehicle power control system, which is characterized in that the automobile includes power battery and engine；
The system comprises:
Parameter acquisition module, for obtaining vehicle operating parameter, wherein the vehicle operating parameter include temperature of powered cell with
Power battery remaining capacity；
First judgment module, for judging the power electric according to the temperature of powered cell and the power battery remaining capacity
Whether pond meets power battery drive condition；
Drive control module drives for when the power battery meets power battery drive condition, controlling the power battery
Move the automobile, or automobile described in the control power battery and the engine driving；When the power battery is unsatisfactory for
When power battery drive condition, automobile described in the engine driving is controlled.
7. vehicle power control system according to claim 6, which is characterized in that the first judgment module includes:
First judging unit, for being not less than temperature threshold, and the power battery remaining capacity when the temperature of powered cell
When not less than the first power threshold, determine that the power battery meets power battery drive condition.
8. vehicle power control system according to claim 6, which is characterized in that the drive control module includes:
Second judgment unit judges whether the engine meets coordinated drive condition according to vehicle operating parameter for judging；
Drive control unit, for controlling the power battery and institute when the engine meets the coordinated drive condition
State automobile described in engine driving；When the engine is unsatisfactory for the coordinated drive condition, controls the power battery and drive
Move the automobile.
9. vehicle power control system according to claim 8, which is characterized in that the vehicle operating parameter further includes vehicle
Speed and travel condition of vehicle information；
The second judgment unit includes:
Second judgment sub-unit, for when meeting at least one of following, determining that engine meets coordinated drive condition:
The power battery remaining capacity is lower than the second power threshold；
The car speed is higher than threshold speed；
Determine that the automobile is in upward slope or acceleration mode according to the travel condition of vehicle information.
10. vehicle power control system according to claim 6, which is characterized in that further include at least one of following:
Charge control module, for controlling the engine to the power battery charging；
Heating control module heats the power battery for controlling the engine.
11. the vehicle power control system according to any one of claim 6 to 10, which is characterized in that the power electric
Pond includes supercapacitor, the first battery and inverter；
Wherein, it connects after the supercapacitor is in parallel with first battery with the inverter.
12. a kind of automobile, which is characterized in that including the vehicle power control system as described in any one of claim 6 to 11.
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| CN201910617938.0A CN110329236A (en) | 2019-07-09 | 2019-07-09 | Automobile power control method, system and automobile |
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