CN105573144A - Electric quantity control method for hybrid electric automobile - Google Patents
Electric quantity control method for hybrid electric automobile Download PDFInfo
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- CN105573144A CN105573144A CN201510937810.4A CN201510937810A CN105573144A CN 105573144 A CN105573144 A CN 105573144A CN 201510937810 A CN201510937810 A CN 201510937810A CN 105573144 A CN105573144 A CN 105573144A
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B17/00—Systems involving the use of models or simulators of said systems
- G05B17/02—Systems involving the use of models or simulators of said systems electric
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- General Physics & Mathematics (AREA)
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- Automation & Control Theory (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention relates to an electric quantity control method for a hybrid electric automobile. The control method comprises the following steps that a static state of charge model is established; a dynamic state of charge model is established; the static state of charge and the dynamic state of charge of a low voltage battery are monitored by a monitor in real time; output voltage of a current chopper is controlled; maximum discharge current or maximum output power adopted by the low voltage battery under the current condition is controlled according to the dynamic state of charge; and maximum charging current or maximum input power received by the low voltage battery under the current condition is controlled according to the dynamic state of charge in braking or downhill braking. According to the method, electric energy provided to the low voltage battery by a high voltage power battery is enabled to be in the better state so that energy utilization rate of the high voltage power battery can be enhanced.
Description
Technical field
The present invention relates to mixed power electric car field, be specifically related to a kind of electric quantity controlling method for mixed power electric car.
Background technology
Along with the continuous deterioration of global environment and the in short supply of the energy, reducing atmospheric pollution and relying on petroleum-based energy becomes the problem more and more paid close attention to various countries.In order to reduce environmental pollution, alleviate Pressure on Energy, the automobile of research energy-saving and environmental protection becomes a kind of inevitable trend of various countries' development auto industry.At present, research and production electric automobile have become the first-selection of various countries' automobile industry.
Normally, mixed power electric car comprises two power storage bags: high voltage power battery and A-battery.High voltage power battery normally when mixed motor-car regenerative braking, the electrical power storage that vehicle energy is changed into; A-battery is then used for powering to vehicle-mounted low-voltage load, and the performance cutting stream device of impact to voltage battery and A-battery conversion efficiency becomes the vital influence factor to electric automobile combination property.
In the middle of prior art, electric quantity controlling method for mixed power electric car is comparatively simple, the low-voltage output voltage of direct current converter is fixed, and fixing output voltage very flexible, often can not consider the combination property of system, therefore, the operational efficiency of mixed power electric car has been had a strong impact on.
Summary of the invention
In order to solve the problems of the technologies described above, the invention provides a kind of electric quantity controlling method for mixed power electric car, by setting up static charge electricity condition model, set up dynamic state-of-charge model, the static charge electricity condition of A-battery and dynamic state-of-charge is monitored in real time by watch-dog, control the output voltage cutting stream device, the maximum discharge current adopted according to A-battery under dynamic state-of-charge control present case or peak power output, when brake or down hill braking, the maximum charging current accepted according to A-battery under dynamic state-of-charge control present case or these six steps of maximal input promote the operational efficiency of mixed power electric cars.
The present invention realizes with following technical scheme, a kind of electric quantity controlling method for mixed power electric car, described electric automobile comprises high voltage power battery network, A-battery, watch-dog and cuts stream device, described stream device of cutting is powered to the A-battery of electric automobile for the high voltage power battery network from electric automobile, and described control method comprises the following steps:
S1. set up static charge electricity condition model for A-battery, described static charge electricity condition under Current Temperatures, humidity, battery whole electricity Q that can release
nthe ratio Q of whole electricity that can discharge when being full of electricity with battery, namely
S2. carry out testing for A-battery and set up dynamic state-of-charge model, described dynamic state-of-charge illustrates the charging and discharging state of A-battery electrode surface, obtains the funtcional relationship of dynamic state-of-charge and momentary current, A-battery voltage, A-battery voltage variety and battery temperature;
S3. the static charge electricity condition of A-battery and dynamic state-of-charge is monitored in real time by watch-dog;
S4. cut the voltage set point of stream device described in setting according to described static charge electricity condition, and cut the output voltage of stream device according to described voltage set point setting, described voltage set point reduces with the rising of described static charge electricity condition;
S5. according to maximum discharge current or the peak power output of A-battery employing under dynamic state-of-charge control present case;
S6. when brake or down hill braking, the maximum charging current accepted according to A-battery under dynamic state-of-charge control present case or maximal input.
Preferably, described voltage set point meets the form of the hyp branch being positioned at first quartile with the Changing Pattern of described static charge electricity condition.
Preferably, described voltage set point changes with described static charge electricity condition parabolic.
Preferably, described voltage set point changes with form of straight lines with described static charge electricity condition.
Choosing, by controlling described voltage set point, described static charge electricity condition is maintained between 40% ~ 55%.
Preferably, described A-battery is the battery of 12 volts, 24 volts or 36 volts.
The invention has the beneficial effects as follows:
The invention provides a kind of electric quantity controlling method for mixed power electric car, by setting up static charge electricity condition model, set up dynamic state-of-charge model, the static charge electricity condition of A-battery and dynamic state-of-charge is monitored in real time by watch-dog, control the output voltage cutting stream device, the maximum discharge current adopted according to A-battery under dynamic state-of-charge control present case or peak power output, when brake or down hill braking, the maximum charging current accepted according to A-battery under dynamic state-of-charge control present case or these six steps of maximal input promote the operational efficiency of mixed power electric cars, high voltage power battery is made to be in more excellent state to the electric energy that A-battery provides, improve the capacity usage ratio of high voltage power battery.
Accompanying drawing explanation
Fig. 1 is a kind of electric quantity controlling method process flow diagram for mixed power electric car.
Embodiment
For making the object, technical solutions and advantages of the present invention clearly, below in conjunction with accompanying drawing, the present invention is described in further detail.
In first embodiment, as shown in Figure 1, a kind of electric quantity controlling method for mixed power electric car, described electric automobile comprises high voltage power battery network, A-battery, watch-dog and cuts stream device, described stream device of cutting is powered to the A-battery of electric automobile for the high voltage power battery network from electric automobile, and described control method comprises the following steps:
S1. set up static charge electricity condition model for A-battery, described static charge electricity condition under Current Temperatures, humidity, battery whole electricity Q that can release
nthe ratio Q of whole electricity that can discharge when being full of electricity with battery, namely
S2. carry out testing for A-battery and set up dynamic state-of-charge model, described dynamic state-of-charge illustrates the charging and discharging state of A-battery electrode surface, obtains the funtcional relationship of dynamic state-of-charge and momentary current, A-battery voltage, A-battery voltage variety and battery temperature;
S3. the static charge electricity condition of A-battery and dynamic state-of-charge is monitored in real time by watch-dog;
S4. cut the voltage set point of stream device described in setting according to described static charge electricity condition, and cut the output voltage of stream device according to described voltage set point setting, described voltage set point reduces with the rising of described static charge electricity condition;
S5. according to maximum discharge current or the peak power output of A-battery employing under dynamic state-of-charge control present case;
S6. when brake or down hill braking, the maximum charging current accepted according to A-battery under dynamic state-of-charge control present case or maximal input.
Described voltage set point meets the form of the hyp branch being positioned at first quartile with the Changing Pattern of described static charge electricity condition.
Make described static charge electricity condition maintain between 40% ~ 55% by controlling described voltage set point, A-battery is 12 volts.
Second embodiment of the invention, a kind of electric quantity controlling method for mixed power electric car, described electric automobile comprises high voltage power battery network, A-battery, watch-dog and cuts stream device, described stream device of cutting is powered to the A-battery of electric automobile for the high voltage power battery network from electric automobile, and described control method comprises the following steps:
S1. set up static charge electricity condition model for A-battery, described static charge electricity condition under Current Temperatures, humidity, battery whole electricity Q that can release
nthe ratio Q of whole electricity that can discharge when being full of electricity with battery, namely
S2. carry out testing for A-battery and set up dynamic state-of-charge model, described dynamic state-of-charge illustrates the charging and discharging state of A-battery electrode surface, obtains the funtcional relationship of dynamic state-of-charge and momentary current, A-battery voltage, A-battery voltage variety and battery temperature;
S3. the static charge electricity condition of A-battery and dynamic state-of-charge is monitored in real time by watch-dog;
S4. cut the voltage set point of stream device described in setting according to described static charge electricity condition, and cut the output voltage of stream device according to described voltage set point setting, described voltage set point reduces with the rising of described static charge electricity condition;
S5. according to maximum discharge current or the peak power output of A-battery employing under dynamic state-of-charge control present case;
S6. when brake or down hill braking, the maximum charging current accepted according to A-battery under dynamic state-of-charge control present case or maximal input.
Described voltage set point changes with described static charge electricity condition parabolic.
By controlling described voltage set point, described static charge electricity condition is maintained between 40% ~ 55%.Described A-battery is 24 volts.
Third embodiment of the invention, a kind of electric quantity controlling method for mixed power electric car, described electric automobile comprises high voltage power battery network, A-battery, watch-dog and cuts stream device, described stream device of cutting is powered to the A-battery of electric automobile for the high voltage power battery network from electric automobile, and described control method comprises the following steps:
S1. set up static charge electricity condition model for A-battery, described static charge electricity condition under Current Temperatures, humidity, battery whole electricity Q that can release
nthe ratio Q of whole electricity that can discharge when being full of electricity with battery, namely
S2. carry out testing for A-battery and set up dynamic state-of-charge model, described dynamic state-of-charge illustrates the charging and discharging state of A-battery electrode surface, obtains the funtcional relationship of dynamic state-of-charge and momentary current, A-battery voltage, A-battery voltage variety and battery temperature;
S3. the static charge electricity condition of A-battery and dynamic state-of-charge is monitored in real time by watch-dog;
S4. cut the voltage set point of stream device described in setting according to described static charge electricity condition, and cut the output voltage of stream device according to described voltage set point setting, described voltage set point reduces with the rising of described static charge electricity condition;
S5. according to maximum discharge current or the peak power output of A-battery employing under dynamic state-of-charge control present case;
S6. when brake or down hill braking, the maximum charging current accepted according to A-battery under dynamic state-of-charge control present case or maximal input.
Described voltage set point changes with form of straight lines with described static charge electricity condition.
By controlling described voltage set point, described static charge electricity condition is maintained between 40% ~ 55%.Described A-battery is the battery of 36 volts.
Above disclosedly be only present pre-ferred embodiments, certainly can not limit the interest field of the present invention with this, therefore according to the equivalent variations that the claims in the present invention are done, still belong to the scope that the present invention is contained.
Claims (6)
1. the electric quantity controlling method for mixed power electric car, it is characterized in that, described electric automobile comprises high voltage power battery network, A-battery, watch-dog and cuts stream device, described stream device of cutting is powered to the A-battery of electric automobile for the high voltage power battery network from electric automobile, and described control method comprises the following steps:
S1. set up static charge electricity condition model for A-battery, described static charge electricity condition under Current Temperatures, humidity, battery whole electricity Q that can release
nthe ratio Q of whole electricity that can discharge when being full of electricity with battery, namely
S2. carry out testing for A-battery and set up dynamic state-of-charge model, described dynamic state-of-charge illustrates the charging and discharging state of A-battery electrode surface, obtains the funtcional relationship of dynamic state-of-charge and momentary current, A-battery voltage, A-battery voltage variety and battery temperature;
S3. the static charge electricity condition of A-battery and dynamic state-of-charge is monitored in real time by watch-dog;
S4. cut the voltage set point of stream device described in setting according to described static charge electricity condition, and cut the output voltage of stream device according to described voltage set point setting, described voltage set point reduces with the rising of described static charge electricity condition;
S5. according to maximum discharge current or the peak power output of A-battery employing under dynamic state-of-charge control present case;
S6. when brake or down hill braking, the maximum charging current accepted according to A-battery under dynamic state-of-charge control present case or maximal input.
2. a kind of electric quantity controlling method for mixed power electric car according to claim 1, is characterized in that, described voltage set point meets the form of the hyp branch being positioned at first quartile with the Changing Pattern of described static charge electricity condition.
3. a kind of electric quantity controlling method for mixed power electric car according to claim 1, is characterized in that, described voltage set point changes with described static charge electricity condition parabolic.
4. a kind of electric quantity controlling method for mixed power electric car according to claim 1, is characterized in that, described voltage set point changes with form of straight lines with described static charge electricity condition.
5. according to a kind of electric quantity controlling method for mixed power electric car in claim 1-4 described in any one, it is characterized in that, by controlling described voltage set point, described static charge electricity condition being maintained between 40% ~ 55%.
6. a kind of electric quantity controlling method for mixed power electric car according to claim 5, is characterized in that, described A-battery is the battery of 12 volts, 24 volts or 36 volts.
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| CN201510937810.4A CN105573144A (en) | 2015-12-15 | 2015-12-15 | Electric quantity control method for hybrid electric automobile |
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Application publication date: 20160511 |