CN102358202A - Method for controlling switchover of electric automobile storage batteries - Google Patents
Method for controlling switchover of electric automobile storage batteries Download PDFInfo
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- CN102358202A CN102358202A CN2011102606953A CN201110260695A CN102358202A CN 102358202 A CN102358202 A CN 102358202A CN 2011102606953 A CN2011102606953 A CN 2011102606953A CN 201110260695 A CN201110260695 A CN 201110260695A CN 102358202 A CN102358202 A CN 102358202A
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Abstract
The invention discloses a method for controlling switchover of electric automobile storage batteries, which comprises the following steps of: firstly, determining a driving mode, i.e. a driving state of an electric automobile according to an accelerator, a brake and current automobile speed; secondly, calculating an operating threshold value of a storage battery SOC required by the electric automobile according to the driving mode of the electric automobile; and finally, the storage batteries are switched over according to the operating threshold value of the storage battery SOC required by the electric automobile and SOC of the current two groups of storage batteries. Therefore, the use of the storage batteries is optimized, the service efficiency of energy of the storage batteries is improved, sufficient electric energy supply can be ensured when the electric automobile needs larger energy, better driving performance of the electric automobile is ensured, and simultaneously, the driving range of the electric automobile is effectively prolonged.
Description
Technical field
The invention belongs to batteries of electric automobile power supply technique field, more specifically, relate to a kind of accumulator of electric car method for handover control.
Background technology
Outstanding day by day along with the enhancing of global environmental consciousness and energy problem, electronlmobil has become the topmost developing direction of green vehicle.Along with becoming increasingly conspicuous of problems such as the development of society and the energy, environmental protection, pure electric automobile more and more receives the attention of countries in the world with its zero-emission, low noise and other advantages, and the electronlmobil related industry has become the developing direction of 21 century automobile industry.Developing rapidly of electronlmobil, to battery power require increasingly highly, at present energy-storage battery related application technology is one of bottleneck of restriction electronlmobil development.
Electronlmobil adopts the mode of a group storage battery to supply power owing to receive the constraint of self-condition and battery management mode mostly at present.But it is not good enough to adopt single group storage battery to provide the design of energy on functional redundancy, to show to electronlmobil, when relevant power equipment supply breaks down, will influence the normal operation of electronlmobil.In addition, adopt the power supply of single group storage battery, in this group storage battery energy stored more after a little while; Can not guarantee driving performances such as electronlmobil startup, acceleration; And electronlmobil can not effectively utilize storage battery energy under this kind power supply mode, has limited the maximum travelled distance of electronlmobil
For improving the antijamming capability of electronlmobil to complex environment, two group storage batteries provide the mode of energy more and more to receive people's attention and attention to electronlmobil.
Under the situation of two group storage batteries power supply; If simply with a group storage battery as working power, an other group storage battery uses as backup power, the service efficiency of storage battery energy is lower; The electric vehicle running mileage is shorter relatively, and the driving performance of electronlmobil is also relatively poor.
Summary of the invention
The objective of the invention is to overcome the deficiency of prior art; A kind of accumulator of electric car method for handover control is provided; Two group storage batteries are cooperated to electronlmobil energy is provided,, its energy service efficiency is provided to optimize the use of storage battery; Prolong the electric automobile during traveling mileage effectively, guarantee that simultaneously electronlmobil has driving performance preferably.
For realizing the foregoing invention purpose, accumulator of electric car method for handover control of the present invention is characterized in that, may further comprise the steps:
(1), calculates electronlmobil expectation acceleration/accel according to throttle, current vehicle speed, definite then electronlmobil current driving operating mode;
Start operating mode: electronlmobil expectation acceleration/accel is greater than quickening setting value, and the electronlmobil current vehicle speed is less than the toggle speed setting value;
Accelerating mode: electronlmobil expectation acceleration/accel is greater than quickening setting value, and the electronlmobil current vehicle speed is greater than the toggle speed setting value;
Level and smooth driving cycle: electronlmobil expectation acceleration/accel is less than quickening setting value, and the electronlmobil current vehicle speed is greater than the toggle speed setting value;
Damped condition: the electronlmobil current vehicle speed is greater than the toggle speed setting value, and chaufeur sends brake signal, and electronlmobil moves with deceleration/decel;
The parking operating mode: the electronlmobil current vehicle speed is less than the toggle speed setting value, and electronlmobil expectation acceleration/accel is less than quickening setting value;
(2), calculate the required storage battery SOC of electronlmobil (State Of Charge, battery charge state) work threshold value according to current electric automobile during traveling operating mode;
Start with accelerating mode under, be demand parameter with electronlmobil expectation acceleration/accel, calculate power demand, calculating through the storage battery related algorithm to provide the storage battery of this power SOC, and with this as the threshold value of working;
Under level and smooth driving cycle; With speed is demand parameter, calculates power demand, and calculating through the storage battery related algorithm to provide the storage battery of this power SOC, with this as the work threshold value;
Under braking and parking operating mode, the work threshold value is set at the discharge limit value of storage battery SOC;
(3), according to the SOC of the required storage battery SOC of electronlmobil work threshold value and current two group storage batteries storage battery is selected and is switched:
As the work storage battery, another group storage battery is as standby battery with a group storage battery;
3.1), starting, under the accelerating mode, when work storage battery SOC satisfies the required storage battery SOC work threshold value of electronlmobil under the current driving operating mode, then to electronlmobil energy be provided by the work storage battery; When work storage battery SOC does not satisfy the required storage battery SOC work threshold value of electronlmobil under the current driving operating mode, and the SOC of standby battery selects and switches to standby battery and to electronlmobil energy is provided when satisfying; When the SOC of work storage battery and standby battery does not satisfy that the required storage battery SOC of electronlmobil works threshold value under the current driving operating mode, select and switch to the higher storage battery of SOC and energy is provided to electronlmobil;
3.2), under level and smooth driving cycle, when work storage battery SOC satisfies the required storage battery SOC work threshold value of electronlmobil under the current driving operating mode, then to electronlmobil energy is provided by the work storage battery; When the SOC of work storage battery does not satisfy the required storage battery SOC work threshold value of electronlmobil under the current driving operating mode, and the SOC of standby battery selects and switches to standby battery and to electronlmobil energy is provided when satisfying; When the SOC of work storage battery and standby battery does not satisfy the required storage battery SOC of electronlmobil under the current driving operating mode and works threshold value, select and switch to the higher storage battery of SOC and energy is provided to electronlmobil;
3.3), under braking and parking operating mode, allow discharge at the lower storage battery of SOC, satisfy the required storage battery SOC work threshold value of electronlmobil under this driving cycle, use the lower storage battery of SOC energy to be provided to electronlmobil.
Goal of the invention of the present invention is achieved in that
Accumulator of electric car method for handover control of the present invention at first according to throttle, brake and current vehicle speed, is confirmed the electric automobile during traveling operating mode, the state of promptly driving a vehicle; Then, according to the electronlmobil operating condition, calculate the required storage battery SOC work threshold value of electronlmobil; Storage battery is switched at last according to the required storage battery SOC work threshold value of electronlmobil and the SOC of current two group storage batteries.Optimized the use of storage battery like this, improved the service efficiency of its energy, can guarantee that electronlmobil is when the bigger energy of needs; There are enough electric energy to supply with; Guaranteed that electronlmobil has driving performance preferably, simultaneously, prolonged the electric automobile during traveling mileage effectively.
Description of drawings
Fig. 1 is the system chart of accumulator of electric car changing method of the present invention practical application;
Fig. 2 is this electronlmobil when not using accumulator of electric car method for handover control of the present invention, the diagram of curves of each parameter of measuring in real time through the circulation road conditions;
This electronlmobil of Fig. 3 after using accumulator of electric car method for handover control of the present invention, the diagram of curves of each parameter of measuring in real time through the circulation road conditions.
The specific embodiment
Describe below in conjunction with the accompanying drawing specific embodiments of the invention, so that those skilled in the art understands the present invention better.What need point out especially is, in the following description, describes in detail perhaps can desalinate main contents of the present invention the time when known function and design-calculated, and these are described in here and will be left in the basket.
Embodiment
Fig. 1 is the system chart of accumulator of electric car changing method of the present invention practical application.
In the present embodiment, as shown in Figure 1, battery car accumulators store system has increased by a group storage battery, and promptly second group storage battery is as the power resources of electronlmobil, and as the work storage battery, second Battery pack is as standby battery with first group storage battery.Can select two group storage batteries and switch according to the driving cycle of electronlmobil and the remaining electric weight of two group storage batteries; The remaining electric weight of storage battery obtains through the SOC that measures storage battery; Thereby make the energy that every group storage battery comprised to discharge and to offer the electronlmobil use fully, make electronlmobil can under identical storage battery equipment, prolong travelled distance, guarantee the electronlmobil driving performance.
In the present embodiment, as shown in Figure 1, the system of accumulator of electric car method for handover control practical application comprises three parts, and the operating mode of promptly going judge module, work threshold calculation module and storage battery are selected handover module.
The accumulator of electric car handover control system is gathered chaufeur throttle, brake, current vehicle speed signal through the driving cycle judge module, judges then and definite electronlmobil current driving operating mode.After definite electronlmobil current driving operating mode, in the work threshold calculation module, calculate the required storage battery SOC of electronlmobil (State Of Charge, battery charge state) work threshold value.The scope of SOC value is 0-1, and the expression battery remaining power accounts for the ratio of battery full capacity.Last storage battery selects handover module according to the SOC of required storage battery SOC work threshold value of electronlmobil and current two group storage batteries storage battery to be selected and switched; Selecting rational storage battery is that electronlmobil provides energy, drives target to satisfy chaufeur.
In the present invention, according to the running state of electronlmobil designed startup, acceleration, five driving cycles that smoothly go, brake, stop, each operating mode definition and explanation as follows:
Start operating mode: under this operating mode, the electronlmobil current vehicle speed is less than the toggle speed setting value, and chaufeur has bigger acceleration/accel demand, and at this moment, electronlmobil expectation acceleration/accel is greater than quickening setting value;
Accelerating mode: under this operating mode, the electronlmobil current vehicle speed is greater than the toggle speed setting value, and chaufeur has bigger acceleration/accel demand simultaneously, and at this moment, electronlmobil expectation acceleration/accel is greater than quickening setting value;
Level and smooth driving cycle: under this operating mode, the electronlmobil current vehicle speed is greater than the toggle speed setting value, and chaufeur does not have brake signal, and the electronlmobil speed of a motor vehicle changes less, and electronlmobil expectation acceleration/accel is less than quickening setting value;
Damped condition: under this operating mode, the electronlmobil current vehicle speed is greater than the toggle speed setting value, and chaufeur sends brake signal, and electronlmobil moves with deceleration/decel;
The parking operating mode: under this operating mode, the electronlmobil current vehicle speed is less than the toggle speed setting value, and chaufeur do not have the acceleration/accel demand, i.e. electronlmobil expectation acceleration/accel is 0.
Above electronlmobil current driving operating mode, driving cycle judge module calculate electronlmobil expectation acceleration/accel according to throttle, current vehicle speed and confirm.
After confirming current electric automobile during traveling operating mode, need calculate the required storage battery SOC of electronlmobil (State Of Charge, battery charge state) work threshold value with that.When only providing the storage battery SOC of energy to be higher than the required storage battery SOC work threshold value of electronlmobil, could guarantee the driving performance under this operating mode of electronlmobil.The calculating of the required storage battery SOC of the electronlmobil under various driving cycles work threshold value and explanation be as follows:
Under startup and accelerating mode, chaufeur needs electronlmobil with bigger acceleration operation, therefore; With electronlmobil expectation acceleration/accel is demand parameter; Calculate power demand, calculating through the storage battery related algorithm to provide the storage battery of this power SOC, with this as the work threshold value;
Under level and smooth driving cycle; Though chaufeur does not need electronlmobil with bigger acceleration operation; But in order to guarantee the driving performance of electronlmobil when the high speed, be demand parameter, calculate power demand with speed; Calculating through the storage battery related algorithm to provide the storage battery of this power SOC, with this as the work threshold value under the level and smooth driving cycle.
Under braking and parking operating mode, do not need storage battery that bigger energy is provided, at this moment the energy that provides of storage battery mainly offers vehicle-mounted accessory equipment, and the work threshold value is set at the discharge limit value of storage battery SOC.
The required storage battery SOC work threshold value of above electronlmobil is calculated by the work threshold calculation module.
Obtaining the required storage battery SOC work threshold value of electronlmobil; Storage battery selects handover module according to the SOC of required storage battery SOC work threshold value of electronlmobil and current two group storage batteries storage battery to be selected and switched; Selecting rational storage battery is that electronlmobil provides energy; Drive target to satisfy chaufeur, concrete selection and explanation as follows:
1), under startup, accelerating mode; Storage battery need provide higher energy to satisfy the bigger acceleration/accel demand of chaufeur to electronlmobil; At this moment; When work storage battery SOC satisfies the required storage battery SOC work threshold value of electronlmobil under the current driving operating mode, then to electronlmobil energy is provided by the work storage battery; When work storage battery SOC does not satisfy the required storage battery SOC work threshold value of electronlmobil under the current driving operating mode, and the SOC of standby battery selects and switches to standby battery and to electronlmobil energy is provided when satisfying; When the SOC of work storage battery and standby battery does not satisfy that the required storage battery SOC of electronlmobil works threshold value under the current driving operating mode, select and switch to the higher storage battery of SOC and energy is provided to electronlmobil;
2), under level and smooth driving cycle; The energy that storage battery provides should satisfy the speed requirement of chaufeur; At this moment, when work storage battery SOC satisfies the required storage battery SOC work threshold value of electronlmobil under the current driving operating mode, then to electronlmobil energy is provided by the work storage battery; When the SOC of work storage battery does not satisfy the required storage battery SOC work threshold value of electronlmobil under the current driving operating mode, and the SOC of standby battery selects and switches to standby battery and to electronlmobil energy is provided when satisfying; When the SOC of work storage battery and standby battery does not satisfy the required storage battery SOC of electronlmobil under the current driving operating mode and works threshold value, select and switch to the higher storage battery of SOC and energy is provided to electronlmobil;
3), under braking and parking operating mode; Storage battery is mainly vehicle-mounted accessory equipments such as air-conditioning energy is provided; The storage battery lower at SOC allows discharge, satisfies the required storage battery SOC work threshold value of electronlmobil under this driving cycle, uses the lower storage battery of SOC to electronlmobil energy to be provided.
Like this; According to the selection and the switchover policy of above-mentioned storage battery, can guarantee that electronlmobil when the bigger energy of needs, has enough electric energy to supply with; Improved the service efficiency of storage battery energy; Guaranteed that electronlmobil has driving performance preferably, simultaneously, prolonged the electric automobile during traveling mileage effectively.
In the present embodiment, because over discharge and storage battery is damaged, influences storage battery service life, the SOC of storage battery is monitored and sets the discharge restriction in order to prevent storage battery in real time.When the energy in the storage battery reduced to that outwards the boundary provides energy again, when promptly the SOC of storage battery dropped to the battery discharge limit value, this storage battery no longer provided energy.
Instance
Accumulator of electric car method for handover control of the present invention is applied to a concrete electronlmobil tests, the concrete parameter of electronlmobil is as shown in table 1:
Table 1
In the instance, two group storage battery SOC initial values are 0.7, and battery discharge SOC limit value is 0.15, and it is 0.4m/s that startup and accelerating mode quicken setting value down
2, starting speed of a motor vehicle setting value is 8Km/h.
1, electronlmobil current driving operating mode is judged
Is 0.4m/s at electronlmobil expectation acceleration/accel greater than quickening setting value
2Situation under, if current vehicle speed thinks then that less than starting the speed of a motor vehicle setting value 8Km/h electronlmobil is in the startup operating mode; If current vehicle speed thinks then that greater than starting the speed of a motor vehicle setting value 8Km/h electronlmobil is in accelerating mode.
Expect that at electronlmobil acceleration/accel is less than quickening setting value 0.4m/s
2Situation under, if current vehicle speed, is thought then that electronlmobil is current greater than starting speed of a motor vehicle setting value 8Km/h and is in level and smooth driving cycle.
Chaufeur sends brake signal, and electronlmobil moves with deceleration/decel, if the electronlmobil current vehicle speed is greater than toggle speed setting value 8Km/h, then thinks the current damped condition that is in of electronlmobil;
Expect that at electronlmobil acceleration/accel is less than quickening setting value 0.4m/s
2Situation under, if current vehicle speed thinks then that less than starting the speed of a motor vehicle setting value 8Km/h electronlmobil is in the parking operating mode.
When Fig. 2 does not use accumulator of electric car method for handover control of the present invention for this electronlmobil, the diagram of curves of each parameter of measuring in real time through the circulation road conditions.In this suite line chart; Transverse axis all is the running time of expression electronlmobil: the picture left above is the SOC diagram of curves of first group storage battery; Expression is along with the SOC of increase by first group storage battery of electric automobile during traveling time changes; Can be found out in 0～5200s that by Fig. 2 electronlmobil adopts first group storage battery that energy is provided, the SOC value of first group storage battery constantly descends until reaching discharge limit value 0.15; Left side figure below is the SOC diagram of curves of second group storage battery; Expression is along with the SOC of increase by second group storage battery of electric automobile during traveling time changes; Can find out preceding 5200s by this diagram of curves at electric automobile during traveling; The SOC of second group storage battery does not reduce, and representes that second group storage battery begins to electronlmobil energy to be provided separately after the first group storage battery depleted of energy.Top right plot be in motion between in the variation of electronlmobil speed, can see that the moving velocity maximum can reach 100km/h in the process of moving, and exist a plurality of accelerators.Bottom-right graph is represented the travelled distance of this type electronlmobil, and this type electronlmobil is under the situation of depleted of energy, and running time is 9000s, and travelled distance is 165.5km.
Fig. 3 is this electronlmobil after using accumulator of electric car method for handover control of the present invention, the diagram of curves of each parameter of measuring in real time through the circulation road conditions.This battery handover control system selects optimum battery pack to electronlmobil energy to be provided alternately according to electronlmobil driving cycles and two group storage battery SOC states.Transverse axis all is the running time of expression electronlmobil in this suite line chart: (a) is first group storage battery among Fig. 3; Promptly the work SOC diagram of curves of storage battery; Expression can be found out the increase along with the running time of electronlmobil along with the SOC of the increase work storage battery of electric automobile during traveling time changes by Fig. 3, and the SOC value of work storage battery is constantly descending until reaching discharge limit value 0.15; Because the employing of accumulator of electric car method for handover control of the present invention; Drop at the SOC of work storage battery and to start and the work threshold value of accelerating mode, after SOC was about 0.4, the SOC descending speed of this group storage battery obviously slowed down; Show another group, promptly standby battery begins to participate in providing of energy.The SOC that can find the work storage battery from Fig. 3 is in some time period; As keeping constant near 3200s, 4600s, the 6000s etc.; This is illustrated in, and the work storage battery does not provide energy to electronlmobil in these time periods; Standby battery is as energy source, and this moment, standby battery SOC had obvious decline in these time periods.The accumulator of electric car method for handover control selects optimum battery pack that energy is provided according to electronlmobil current driving operating mode and storage battery SOC state.(c) is second group storage battery among Fig. 3; It is the SOC diagram of curves of standby battery; Expression can be found out the preceding 3200s at electric automobile during traveling along with the SOC of the increase standby battery of electric automobile during traveling time changes by this diagram of curves, and the SOC of standby battery does not reduce; The expression standby battery does not during this period of time provide energy to electronlmobil; Its reason is to work the SOC value of storage battery greater than each driving cycle work threshold value this moment, and the energy that the storage battery of working provides can satisfy the demand under each driving cycle, and the storage battery handover control system does not have the cut-in stand-by battery provides energy by it.Increase along with the electric automobile during traveling time; When the SOC value of work storage battery is lower than the SOC work threshold value of startup and the required storage battery of accelerating mode electronlmobil; Selecting and switching to standby battery provides energy to electronlmobil; This moment, standby battery SOC value began to reduce, this be illustrated in start and operating modes such as acceleration under when the bigger energy requirement of electronlmobil proposition, provide energy to satisfy the driving demand by the higher standby battery of energy.When the driving cycle of less energy requirement such as braking, parking; The work storage battery lower by energy provides energy; So not only satisfied the chaufeur demand but also can not cause the waste of energy, when work storage battery SOC value is low to moderate limit value 0.15, the storage battery of working will lose the power supply capacity to electronlmobil; Separately to the electronlmobil power supply, can see that the SOC descending speed of standby battery accelerates this moment by standby battery.Among Fig. 3 (b) be in motion between in the variation of electronlmobil speed, can see that the moving velocity maximum can reach 100km/h in the process of moving, and exist a plurality of accelerators.Can be known that by (d) among Fig. 3 the running time of electronlmobil is about 10000s (2 hours 45 minutes), its travelled distance reaches 179.1km at last along with the continuous increase of being increased in of time.Among Fig. 3 (e), (f) be electronlmobil in the driving process of 7100s to 7200s, promptly among Fig. 3 in (a) near C point, the SOC change curve of two group storage batteries is it is thus clear that two group storage batteries alternately provide energy to electronlmobil.A few width of cloth figure among Fig. 3 are combined, at electric automobile during traveling to 400s, promptly among the figure during A point; Once quicken demand, require the speed of a motor vehicle to rise to 100km/h, and go a period of time with the rate smoothing of 90km/h by 0km/h; This driving procedure needs battery to electronlmobil bigger energy to be provided, and the storage battery SOC that works this moment is higher, can satisfy chaufeur and drive demand; SOC significantly decreased after the work storage battery provided energy, dropped to 0.60 by 0.67, and storage battery SOC is higher because work this moment; Standby battery does not provide energy to electronlmobil, and its SOC value does not change, and remains on 0.70; In the braking procedure of 0km/h, the work storage battery relatively low by present energy provides at subsequently 100km/h; To 3200s, during the B point, chaufeur has proposed once same acceleration demand among the figure at electric automobile during traveling; Require the speed of a motor vehicle to rise to 100km/h by 0km/h; And go a period of time with the rate smoothing of 90km/h, the SOC that threshold calculation module calculates storage battery but work this moment is lower than and starts and accelerating mode work threshold value, and promptly about 0.4; Can not satisfy the target under the current driving operating mode; Then provide higher energy to satisfy the chaufeur demand by standby battery, to electronlmobil energy is not provided by the visible storage battery of working at this moment of Fig. 3, its SOC maintains about 0.38.Standby battery after process provides energy for this reason SOC significantly decrease; Its SOC drops to 0.64 by 0.70; At subsequently 100km/h in the braking procedure of 0km/h, because braking procedure needs energy less, so provide by the relatively low work storage battery of energy; This moment, standby battery did not provide energy, and its SOC maintains about 0.64; Arrive 8000s at electric automobile during traveling; When the C point is neighbouring among the figure; Electronlmobil has a plurality of startups, acceleration and damped condition, selects storage battery that energy is provided according to driving operating mode and two group storage battery SOC, when starting and quicken, uses the higher standby battery of energy that energy is provided; When braking and parking, use the lower work storage battery of energy that energy is provided, two group storage batteries alternately provide energy to electronlmobil; Simulate 9500s at electronlmobil, when the D point was neighbouring among the figure, work storage battery SOC had dropped to the discharge limit value, is the protection battery, and forbid that working battery provides energy this moment, and adopt standby battery to electronlmobil energy to be provided separately.Work storage battery, standby battery provide energy to electronlmobil through accumulator of electric car method for handover control of the present invention under different driving cycles, with the driving target of realization chaufeur, and reach the target of optimizing the energy service efficiency.Can know through Fig. 2,3,, prolong the travelled distance of electronlmobil effectively, satisfy chaufeur and drive demand owing to the employing of accumulator of electric car method for handover control of the present invention.
Table 2 is to use and does not use accumulator of electric car method for handover control electronlmobil acceleration capability contrast simulation result of the present invention.
Table 2
In table 2, work storage battery SOC initial value is 0.3, and standby battery SOC initial value is 0.7.
Do not use the electronlmobil elder generation use work storage battery of accumulator of electric car method for handover control of the present invention, its SOC uses standby battery after reaching the discharge limit value again.Find through test result; Using accumulator of electric car method for handover control of the present invention to compare at the pick-up time of three velocity shooting 0～50km/h, 50～80km/h and 0～100km/h does not use accumulator of electric car method for handover control electronlmobil of the present invention all to improve; Be respectively 10.3%, 11.5% and 11.1%; This is because behind the electronlmobil use accumulator of electric car method for handover control of the present invention, can when chaufeur proposes higher energy requirement, use the higher battery pack of SOC, satisfies the instantaneous high-power demand of chaufeur; Reach the purpose that shortens pick-up time, guaranteed the driving performance of electronlmobil.
Table 3 is to use and does not use accumulator of electric car method for handover control electronlmobil contrast test result.Under circulate at a high speed road conditions (HWFET), expressway circulation road conditions (US06), city circulation road conditions (UDDS), carried out test experiments.
Table 3
Visible by table 3; Under each test road conditions; Use the electronlmobil of accumulator of electric car method for handover control to use accumulator of electric car method for handover control electronlmobil more excellent on performance, starting under the frequent city circulation road conditions, can use storage battery energy better especially.Electronlmobil can reduce the energy expenditure rate of electronlmobil, and can prolong the travelled distance of electronlmobil after using accumulator of electric car method for handover control of the present invention.
Although above the illustrative specific embodiment of the present invention is described; So that the technical personnel in present technique field is understood the present invention, but should be clear, the invention is not restricted to the scope of the specific embodiment; To those skilled in the art; As long as various variations appended claim limit and the spirit and scope of the present invention confirmed in, these variations are conspicuous, all utilize innovation and creation that the present invention conceives all at the row of protection.
Claims (2)
1. an accumulator of electric car method for handover control is characterized in that, may further comprise the steps:
(1), calculates electronlmobil expectation acceleration/accel according to throttle, current vehicle speed, definite then electronlmobil current driving operating mode;
Start operating mode: electronlmobil expectation acceleration/accel is greater than quickening setting value, and the electronlmobil current vehicle speed is less than the toggle speed setting value;
Accelerating mode: electronlmobil expectation acceleration/accel is greater than quickening setting value, and the electronlmobil current vehicle speed is greater than the toggle speed setting value;
Level and smooth driving cycle: electronlmobil expectation acceleration/accel is less than quickening setting value, and the electronlmobil current vehicle speed is greater than the toggle speed setting value;
Damped condition: the electronlmobil current vehicle speed is greater than the toggle speed setting value, and chaufeur sends brake signal, and electronlmobil moves with deceleration/decel;
The parking operating mode: the electronlmobil current vehicle speed is less than the toggle speed setting value, and electronlmobil expectation acceleration/accel is less than quickening setting value;
(2), calculate the required storage battery SOC of electronlmobil (State Of Charge, battery charge state) work threshold value according to current electric automobile during traveling operating mode;
Start with accelerating mode under, be demand parameter with electronlmobil expectation acceleration/accel, calculate power demand, calculating through the storage battery related algorithm to provide the storage battery of this power SOC, and with this as the threshold value of working;
Under level and smooth driving cycle; With speed is demand parameter, calculates power demand, and calculating through the storage battery related algorithm to provide the storage battery of this power SOC, with this as the work threshold value;
Under braking and parking operating mode, the work threshold value is set at the discharge limit value of storage battery SOC;
(3), according to the SOC of the required storage battery SOC of electronlmobil work threshold value and current two group storage batteries storage battery is selected and is switched:
As the work storage battery, another group storage battery is as standby battery with a group storage battery;
3.1), starting, under the accelerating mode, when work storage battery SOC satisfies the required storage battery SOC work threshold value of electronlmobil under the current driving operating mode, then to electronlmobil energy be provided by the work storage battery; When work storage battery SOC does not satisfy the required storage battery SOC work threshold value of electronlmobil under the current driving operating mode, and the SOC of standby battery selects and switches to standby battery and to electronlmobil energy is provided when satisfying; When the SOC of work storage battery and standby battery does not satisfy that the required storage battery SOC of electronlmobil works threshold value under the current driving operating mode, select and switch to the higher storage battery of SOC and energy is provided to electronlmobil;
3.2), under level and smooth driving cycle, when work storage battery SOC satisfies the required storage battery SOC work threshold value of electronlmobil under the current driving operating mode, then to electronlmobil energy is provided by the work storage battery; When the SOC of work storage battery does not satisfy the required storage battery SOC work threshold value of electronlmobil under the current driving operating mode, and the SOC of standby battery selects and switches to standby battery and to electronlmobil energy is provided when satisfying; When the SOC of work storage battery and standby battery does not satisfy the required storage battery SOC of electronlmobil under the current driving operating mode and works threshold value, select and switch to the higher storage battery of SOC and energy is provided to electronlmobil;
3.3), under braking and parking operating mode, allow discharge at the lower storage battery of SOC, satisfy the required storage battery SOC work threshold value of electronlmobil under this driving cycle, use the lower storage battery of SOC energy to be provided to electronlmobil.
2. accumulator of electric car method for handover control according to claim 1 is characterized in that, when the SOC of storage battery dropped to the battery discharge limit value, this storage battery no longer provided energy.
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