CN103625264B - A kind of automobile power-assisted power generating system of composite energy storage - Google Patents
A kind of automobile power-assisted power generating system of composite energy storage Download PDFInfo
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- CN103625264B CN103625264B CN201310559378.0A CN201310559378A CN103625264B CN 103625264 B CN103625264 B CN 103625264B CN 201310559378 A CN201310559378 A CN 201310559378A CN 103625264 B CN103625264 B CN 103625264B
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Abstract
The present invention relates to a kind of automobile power-assisted power generating system of composite energy storage, this system is made up of power-assisted electric generator, rectification/inverter, main power inverter, super capacitor, auxiliary power changer, by-pass switch, storage battery, microprocessor unit, starter; This system can provide power-assisted, recoverable vehicle energy for driving engine and can realize the automobile power-assisted power generating system of driving engine start-stop function at any time; Contribute to prolonging service life of battery, and the urban traffic situation start-stop function at any time of various displacement engine can be realized, oil consumption and the discharge of vehicle can be reduced; Super capacitor is combined the Applicable scope having expanded motor with power inverter, vehicle sliding and Brake energy recovery can store by system, also for driving engine provides power-assisted at vehicle start and when overtaking other vehicles, the dynamic property of vehicle can be improved further on oil-saving discharging-reducing basis.
Description
Technical field
The present invention relates to a kind of automobile power-assisted power generating system, belong to composite energy storage technical field, particularly relate to a kind of automobile power-assisted power generating system of composite energy storage.
Background technology
Along with the quick increase of automobile pollution in recent years, energy consumption and the emission problem of orthodox car driving engine become increasingly conspicuous.The companies such as German Bosch are proposed automobile start-stop system; start speed of engine is promoted mainly through strengthening starting motor torque; automatic engine stop function when realizing idling; to reduce oil consumption and the discharge of waiting; simultaneously by optimizing dynamo efficiency, reduce the oil consumption of automotive engine further.
But the performance of existing start stop system still has much room for improvement, as start stop system is only applicable to urban congestion operating mode, the energy-saving effect under the continuous travel conditions of automobile is produced little effect; Start stop system uses 12V batteries to store energy usually, and low voltage limits power of motor, and under vehicle starting and the operating mode such as to overtake other vehicles, start stop system does not possess for driving engine provides the ability of auxiliary power in short-term; The lead-acid battery charging rate used in start stop system is slow, is difficult to effectively reclaim the vehicle energy slided and in braking procedure.For solving the problem, the automobile power-assisted power generating system of a kind of composite energy storage that the present invention proposes, this system and driving engine are connected by belt and adopt super capacitor and storage battery composite energy storage, can be driving engine and provide power-assisted and the kinetic energy that can reclaim automobile.
Summary of the invention
The object of the present invention is to provide a kind of automobile power-assisted power generating system of composite energy storage, this system is made up of power-assisted electric generator, rectification/inverter, main power inverter, super capacitor, auxiliary power changer, by-pass switch, storage battery, microprocessor unit, starter; Wherein, the AC port of rectification/inverter is connected with the three-phase windings of power-assisted electric generator, and its DC port is connected with the high pressure side of main power inverter and the high pressure side of by-pass switch; The low pressure side of main power inverter is connected with the high pressure side of the low pressure side of by-pass switch, super capacitor and auxiliary power changer; The low pressure side of auxiliary power changer is connected with storage battery, starter; Microprocessor unit is connected with rectification/inverter, main power inverter, auxiliary power changer, by-pass switch respectively.This system can provide power-assisted, recoverable vehicle energy for driving engine and can realize the automobile power-assisted power generating system of driving engine start-stop function at any time.
For achieving the above object, the technical solution used in the present invention is a kind of automobile power-assisted power generating system of composite energy storage, and wherein, power-assisted electric generator is electronic/generating integrated alternating current dynamo, and its rotating shaft is connected and transferring power with driving engine by belt; Rectification/inverter can bi-directional electric energy, its inverter mode corresponding power-assisted electric generator electric operation, rectification state corresponding power-assisted electric generator generator operation.
Super-capacitor voltage V in system worked well
caphigher than battery tension V
bat, i.e. V
cap>V
bat.
Main power inverter has by the DC boosting function of super capacitor to rectification/inverter direction, and auxiliary power changer has by the DC decompression function of super capacitor to storage battery direction.
Main power inverter and auxiliary power changer at least the two one of there is DC decompression function to super capacitor direction.
When main power inverter to have by rectification/inverter to the buck functionality in super capacitor direction, it is input as bus voltage V
bus, output voltage range is 0 ~ V
cap, wherein V
cap<V
bus.
When auxiliary power changer to have by storage battery to the buck functionality in super capacitor direction, its input voltage is V
bat, output voltage range is 0 ~ V
bat; When auxiliary power changer to have by storage battery to the buck functionality in super capacitor direction, also need to possess equidirectional boost function, its input voltage is V
bat, output voltage range is V
bat~ V
cap, wherein V
bat<V
cap<V
bus.
By-pass switch has disconnection and closed two kinds of mode of operations, and can realize the bypass effect to main power inverter, for main power inverter and the auxiliary power changer of ad hoc structure, by-pass switch can be default.
Storage battery provides electric energy for the electrical load of starter and vehicle.Wherein, for main power inverter and the auxiliary power changer of ad hoc structure, starter can be default.
Microprocessor unit can detect and control the mode of operation of rectification/inverter, main power inverter, auxiliary power changer and by-pass switch.
Engine cold starting before normally working containing the power-assisted power generating system of starter and super capacitor pre-charge process, supply energy to starter by storage battery and realize engine starting, then the electric energy that exports of power-assisted electric generator is through rectification/inverter and the charging of main power inverter (or by-pass switch) super capacitor, meets till power-assisted electric generator can provide the voltage needed for power-assisted for driving engine until reaching.
Engine cold starting before normally working without the power-assisted power generating system of starter and super capacitor pre-charge process, by storage battery through auxiliary power changer be super capacitor charge, until reach meet power-assisted electric generator can voltage needed for fire an engine, then super capacitor energy-storage is through by-pass switch (or main power inverter) and rectification/inverter supply power-assisted electric generator electric operation fire an engine, the electric energy that power-assisted electric generator exports afterwards is super capacitor charging through rectification/inverter and by-pass switch, meet till power-assisted electric generator can provide the minimum voltage needed for power-assisted for driving engine until reaching.
V is had after super capacitor precharge completes
cap>V
bat.
In system worked well, when vehicle needs high pulling torque under the operating mode such as to start to walk, overtake other vehicles, power-assisted electric generator electric operation provides power-assisted for driving engine, and super capacitor energy-storage is through main power inverter and rectification/inverter supply power-assisted electric generator, and main power inverter is in pressure-increasning state.This process V
bus>V
cap.
In system worked well, when super capacitor energy-storage is not enough, power-assisted electric generator works in generating state, is super capacitor charging by rectification/inverter and main power inverter (or by-pass switch), meets till power-assisted electric generator can provide the voltage needed for power-assisted for driving engine until reaching.
In system worked well, when vehicle sliding or braking, power-assisted electric generator works in generating state, and be super capacitor charging by rectification/inverter and main power inverter (or by-pass switch), charging limit reaches super capacitor rated voltage.
In system worked well, when batteries to store energy is not enough, super capacitor is battery charge through auxiliary power changer, and auxiliary power changer works in step-down state.
In system worked well, when engine thermal is started, super capacitor energy-storage is through by-pass switch or main power inverter and rectification/inverter supply power-assisted electric generator electric operation.
Compared with prior art the present invention has following beneficial effect.
1, super capacitor bears large current density Electricity Functional, and storage battery is vehicle electric load supplying, contributes to prolonging service life of battery.
2, common lead acid accumulator and starter can meet application requirement, and system cost reduces, and super-capacitor voltage grade improves simultaneously, energy storage capacity strengthens, can heavy-duty motor be mated, the urban traffic situation start-stop function at any time of various displacement engine can be realized, oil consumption and the discharge of vehicle can be reduced.
3, super capacitor is combined the Applicable scope having expanded motor with power inverter, vehicle sliding and Brake energy recovery can store by system, also for driving engine provides power-assisted at vehicle start and when overtaking other vehicles, the dynamic property of vehicle can be improved further on oil-saving discharging-reducing basis.
Accompanying drawing explanation
Fig. 1 is the power-assisted power generation system structure figure of composite energy storage.
Fig. 2 is the power-assisted power generating system composition diagram containing starter.
Fig. 3 is the power-assisted power generating system composition diagram without starter.
In figure: 1, power-assisted electric generator; 2, rectification/inverter; 3, main power inverter; 4, super capacitor; 5, auxiliary power changer; 6, by-pass switch; 7, storage battery; 8, microprocessor unit; 9, starter; 11, electrical load; 12, driving engine.
Detailed description of the invention
Below with reference to accompanying drawing, the invention will be further described.
Be illustrated in figure 1 the power-assisted power generating system composition diagram of composite energy storage, this composite energy storage power-assisted power generating system system is made up of power-assisted electric generator 1, rectification/inverter 2, main power inverter 3, super capacitor 4, auxiliary power changer 5, by-pass switch 6, storage battery 7, microprocessor unit 8, starter 9; Driving engine 12 is in order to transferring power, and electrical load 11 is system load; Wherein, power-assisted electric generator 1 is electronic/generating integrated alternating current dynamo, and machine shaft is connected with transferring power by belt with driving engine 12; Rectification/inverter 2 can bi-directional electric energy, its inverter mode corresponding power-assisted electric generator 1 electric operation, rectification state corresponding power-assisted electric generator 1 generator operation; The AC port of rectification/inverter 2 is connected with the three-phase windings of power-assisted electric generator 1, and its DC port is connected with the high pressure side of main power inverter 3 and the high pressure side of by-pass switch 6; The low pressure side of main power inverter 3 is connected with the high pressure side of the low pressure side of by-pass switch 6, super capacitor 4 and auxiliary power changer 5; The low pressure side of auxiliary power changer 5 is connected with storage battery 7, starter 9; Microprocessor unit 8 is connected with rectification/inverter 2, main power inverter 3, auxiliary power changer 5, by-pass switch 6 respectively.
Super capacitor 4 need meet the electric energy for power-assisted electric generator 1 provides electric energy to send for its electric operation or storage power-assisted electric generator 1, the function for storage battery 7 charging simultaneously, therefore, and the super capacitor 4 voltage V in normal work
caphigher than storage battery 7 voltage V
bat, i.e. V
cap>V
bat; In addition, bus voltage V
busmaxim should be higher, contributes to reducing the working current of power-assisted electric generator 1, improves its efficiency and reduce the cost of rectification/inverter 2; V can be selected
bushighest voltage level is 42V.
Main power inverter 3 has by the DC boosting function of super capacitor 4 to rectification/inverter 2 direction, and its input voltage is V
cap, output voltage is V
bus.
Auxiliary power changer 5 has by the DC decompression function of super capacitor 4 to storage battery 7 direction, and its input voltage is V
cap, output voltage is V
bat.
Main power inverter 3 and auxiliary power changer 5 at least the two one of there is DC decompression function to super capacitor 4 direction; When main power inverter 3 to have by rectification/inverter 2 to the buck functionality in super capacitor 4 direction, it is input as bus voltage V
bus, output voltage range is 0 ~ V
cap, wherein V
cap<V
bus; When auxiliary power changer 5 to have by storage battery 7 to the buck functionality in super capacitor 4 direction, its input voltage is V
bat, output voltage range is 0 ~ V
bat; When auxiliary power changer 5 to have by storage battery 7 to the buck functionality in super capacitor 4 direction, also need to possess equidirectional boost function, its input voltage is V
bat, output voltage range is V
bat~ V
cap, wherein V
bat<V
cap<V
bus.
By-pass switch 6 has disconnection and closed two kinds of mode of operations, can realize the bypass effect to main power inverter 3, and for main power inverter 3 and the auxiliary power changer 5 of ad hoc structure, by-pass switch 6 can be default.
Microprocessor unit 8 can detect the mode of operation of rectification/inverter 2, main power inverter 3, auxiliary power changer 5 and by-pass switch 6, and changes its mode of operation by the binistor controlled in above-mentioned parts.
When driving engine 12 cold start and super capacitor 4 precharge, for the system containing starter 9, by storage battery 7 for starter 9 provides energy, after engine starting, power-assisted electric generator 1 exports electric energy, is super capacitor 4 precharge through rectification/inverter 2; For not containing the system of starter 9, be super capacitor 4 precharge by storage battery 7 through auxiliary power changer 5, super capacitor 4 through rectification/inverter 2 for power-assisted electric generator 1 provides electric energy confession its electric operation fire an engine 12.
Vehicle needs high pulling torque as starting, operating mode of overtaking other vehicles, power-assisted electric generator 1 electric operation provides power-assisted for driving engine 12, main power inverter 3 is in pressure-increasning state, the energy storage of super capacitor 4 supplies power-assisted electric generator 1 through main power inverter 3 and rectification/inverter 2, super capacitor 4 continuous energy release, its voltage V
capreduce gradually.
Under vehicle sliding, damped condition or when super capacitor 4 energy storage is not enough, power-assisted electric generator 1 all works in generating state, is charged for super capacitor 4 by rectification/inverter 2, main power inverter 3 or by-pass switch 6; Super capacitor 4 energy storage deficiency charges normal to power-assisted electric generator 1 as driving engine 12 provides auxiliary power required voltage V
captill; When vehicle sliding and Brake energy recovery enter super capacitor 4, the energy storage limit is that the voltage of super capacitor 4 reaches its rated value.
When batteries to store energy is not enough, super capacitor 4 charges for storage battery 7 through auxiliary power changer 5.
When engine thermal is started, the energy storage of super capacitor 4 supplies power-assisted electric generator 1 electric operation through by-pass switch 6 or main power inverter 3 and rectification/inverter 2.
Be illustrated in figure 2 the power-assisted power generating system composition diagram containing starter, this power-assisted power generating system is made up of power-assisted electric generator 1, rectification/inverter 2, main power inverter 3, super capacitor 4, auxiliary power changer 5, by-pass switch 6, storage battery 7, microprocessor unit 8, starter 9; Wherein, by T21 ~ T26 totally six binistors connect to form the three phase rectifier/inversion bridge circuit with three brachium pontis, each brachium pontis mid point is connected with the three-phase windings of power-assisted electric generator 1 respectively; Main power inverter 3 is formed by connecting by T31, T32 two binistors and inductance L 3, forms bidirectional Buck-Boost converter; Auxiliary power changer 5 is formed by connecting by switching element T 5, diode D51, D52 and inductance L 5, and T5, D51 and L5 form buck converter jointly; Diode D52 is also provided with in auxiliary power changer 5, forward is connected between super capacitor 4 and switching element T 5, effect avoids the super capacitor 4 when storage battery 7 and low voltage to form discharge loop to cause energy loss, and diode D52 also can substitute with binistor; By-pass switch 6 is realized by switching element T 6, and when main power inverter 3 is bidirectional Buck-Boost converter, switch 6 can save, and coordinate and also can complete correlation function, but power inverter 3 continuous working can increase system power dissipation by main power inverter 3.
During driving engine 12 cold start, storage battery 7 is powered for starter 9, and the T5 in auxiliary power changer 5 is in off state, and between super capacitor 4 and storage battery 7, noenergy exchanges.After driving engine 12 starts, power-assisted electric generator 1 carries out precharge by rectification/inverter 2, main power inverter 3 or by-pass switch 6 for super capacitor 4, until reach power-assisted electric generator 1 for driving engine 12 to provide power-assisted required voltage; In pre-charge process, when super capacitor 4 initial voltage is very low, by-pass switch 6 turns off, and main power inverter 3 works in by the decompression mode of rectification/inverter 2 to super capacitor 4 direction; When super capacitor 4 voltage and rectification/inverter 2 output voltage close to time, by-pass switch 6 closes, and the main power inverter 3 of bypass, can reduce system power dissipation; After precharge completes, auxiliary power changer 5 enters normal step-down mode of operation.
Power-assisted electric generator 1 for driving engine power-assisted is provided time, by-pass switch 6 turns off, main power inverter 3 is in by the pressure-increasning state of super capacitor 4 to rectification/inverter 2, and the energy storage of super capacitor 4 supplies power-assisted electric generator 1 electric operation through main power inverter 3 and rectification/inverter 2.
When vehicle sliding, braking or super capacitor 4 energy storage are not enough, power-assisted electric generator 1 all works in generating state, is charged for super capacitor 4 by rectification/inverter 2, main power inverter 3 or by-pass switch 6; When super capacitor 4 voltage is lower, by-pass switch 6 turns off, and main power inverter 3 works in by the decompression mode of rectification/inverter 2 to super capacitor 4 direction; When super capacitor 4 voltage and rectification/inverter 2 output voltage close to time, by-pass switch 6 closes.
During driving engine 12 hot start, the energy storage of super capacitor 4 supplies power-assisted electric generator 1 electric operation through main power inverter 3 or by-pass switch 6 and rectification/inverter 2.
Be illustrated in figure 3 the power-assisted power generating system composition diagram without starter, this power-assisted power generating system is made up of power-assisted electric generator 1, rectification/inverter 2, main power inverter 3, super capacitor 4, auxiliary power changer 5, by-pass switch 6, storage battery 7, microprocessor unit 8; Wherein, by T21 ~ T26 totally six binistors connect to form the three phase rectifier/inversion bridge circuit with three brachium pontis, each brachium pontis mid point is connected with the three-phase windings of power-assisted electric generator 1 respectively; Main power inverter 3 is formed by connecting by diode D31, switching element T 32 and inductance L 3, forms booster converter; Auxiliary power changer 5 is formed by connecting by switching element T 51 ~ T53, diode D51 and inductance L 5, and T51, T52 and L5 form reversible transducer jointly, and T53, D51 and L5 form buck converter jointly; By-pass switch 6 is realized by switching element T 6.
Before driving engine 12 cold start, storage battery 7 is super capacitor 4 precharge by auxiliary power changer 5; When super capacitor 4 initial voltage is very low, the switching element T 51 in auxiliary power changer 5, T52 turn off, and the buck converter that T53, D51 and L5 are formed works in by the decompression mode of storage battery 7 to super capacitor 4 direction; When super capacitor 4 and storage battery 7 voltage close to time, T53 constant conduction, the reversible transducer that T51, T52 and L5 are formed works in by the boost mode of storage battery 7 to super capacitor 4 direction, until reach power-assisted electric generator 1 fire an engine 12 required voltage.
When driving engine 12 cold start and hot start, the energy storage of super capacitor 4 supplies power-assisted electric generator 1 electric operation through main power inverter 3 or by-pass switch 6 and rectification/inverter 2.
When vehicle sliding, braking or super capacitor 4 energy storage are not enough, power-assisted electric generator 1 all works in generating state, is charged for super capacitor 4 by rectification/inverter 2, by-pass switch 6.
Power-assisted electric generator 1 for driving engine power-assisted is provided time, by-pass switch 6 turns off, main power inverter 3 is in by the pressure-increasning state of super capacitor 4 to rectification/inverter 2, and the energy storage of super capacitor 4 supplies power-assisted electric generator 1 electric operation through main power inverter 3 and rectification/inverter 2.
When storage battery 7 energy storage is not enough, super capacitor 4 is its charging through auxiliary power changer 5; Switching element T 53 in auxiliary power changer 5 turns off, and the reversible transducer that T51, T52 and L5 are formed works in by the decompression mode of super capacitor 4 to storage battery 7 direction.
Claims (4)
1. an automobile power-assisted power generating system for composite energy storage, is characterized in that: composite energy storage power-assisted power generating system is made up of power-assisted electric generator (1), rectification/inverter (2), main power inverter (3), super capacitor (4), auxiliary power changer (5), by-pass switch (6), storage battery (7), microprocessor unit (8); Driving engine (12) is in order to transferring power, and electrical load (11) is system load; Wherein, power-assisted electric generator (1) is electronic/generating integrated alternating current dynamo, and machine shaft is connected with transferring power by belt with driving engine (12); Rectification/inverter (2) can bi-directional electric energy, corresponding power-assisted electric generator (1) electric operation of its inverter mode, corresponding power-assisted electric generator (1) generator operation of rectification state; The AC port of rectification/inverter (2) is connected with the three-phase windings of power-assisted electric generator (1), and its DC port is connected with the high pressure side of main power inverter (3) and the high pressure side of by-pass switch (6); The low pressure side of main power inverter (3) is connected with the high pressure side of the low pressure side of by-pass switch (6), super capacitor (4) and auxiliary power changer (5); The low pressure side of auxiliary power changer (5) is connected with storage battery (7), starter (9); Microprocessor unit (8) is connected with rectification/inverter (2), main power inverter (3), auxiliary power changer (5), by-pass switch (6) respectively;
Super capacitor (4) need meet simultaneously to be provided electric energy for its electric operation for power-assisted electric generator (1) or stores the electric energy that power-assisted electric generator (1) sends, the function of charging for storage battery (7), therefore, super capacitor (4) the voltage V in normal work
caphigher than storage battery (7) voltage V
bat, i.e. V
cap>V
bat; In addition, bus voltage V
busmaxim should be high, contributes to reducing the working current of power-assisted electric generator (1), improves its efficiency and reduce the cost of rectification/inverter (2);
Main power inverter (3) has by the DC boosting function of super capacitor (4) to rectification/inverter (2) direction, and its input voltage is V
cap, output voltage is V
bus;
Auxiliary power changer (5) has by the DC decompression function of super capacitor (4) to storage battery (7) direction, and its input voltage is V
cap, output voltage is V
bat;
Main power inverter (3) and auxiliary power changer (5) at least the two one of there is DC decompression function to super capacitor (4) direction; When main power inverter (3) to have by rectification/inverter (2) to the buck functionality in super capacitor (4) direction, it is input as bus voltage V
bus, output voltage range is 0 ~ V
cap, wherein V
cap<V
bus; When auxiliary power changer (5) to have by storage battery (7) to the buck functionality in super capacitor (4) direction, its input voltage is V
bat, output voltage range is 0 ~ V
bat; When auxiliary power changer (5) to have by storage battery (7) to the buck functionality in super capacitor (4) direction, also need to possess equidirectional boost function, its input voltage is V
bat, output voltage range is V
bat~ V
cap, wherein V
bat<V
cap<V
bus;
By-pass switch (6) has disconnection and closed two kinds of mode of operations, the Bypass Control to main power inverter (3) can be realized, for main power inverter (3) and the auxiliary power changer (5) of ad hoc structure, by-pass switch (6) can be default;
Microprocessor unit (8) can detect the mode of operation of rectification/inverter (2), main power inverter (3), auxiliary power changer (5) and by-pass switch (6), and changes its mode of operation by the binistor controlled in above-mentioned parts;
When driving engine (12) cold start and super capacitor (4) precharge, for the system containing starter (9), by storage battery (7) for starter (9) provides energy, after engine starting, power-assisted electric generator (1) exports electric energy, is super capacitor (4) precharge through rectification/inverter (2); For the system not containing starter (9), be super capacitor (4) precharge by storage battery (7) through auxiliary power changer (5), super capacitor (4) through rectification/inverter (2) for power-assisted electric generator (1) provides electric energy for its electric operation fire an engine (12);
Vehicle needs high pulling torque as starting, operating mode of overtaking other vehicles, power-assisted electric generator (1) electric operation is that driving engine (12) provides power-assisted, main power inverter (3) is in pressure-increasning state, the energy storage of super capacitor (4) is through main power inverter (3) and rectification/inverter (2) supply power-assisted electric generator (1), super capacitor (4) continuous energy release, its voltage V
capreduce gradually;
Under vehicle sliding, damped condition or when super capacitor (4) energy storage is not enough, power-assisted electric generator (1) all works in generating state, by rectification/inverter (2) and by-pass switch (6), or rectification/inverter (2) and main power inverter (3) are super capacitor (4) charging; Super capacitor (4) energy storage deficiency charges normal to power-assisted electric generator (1) as driving engine (12) provides auxiliary power required voltage V
captill; When vehicle sliding and Brake energy recovery enter super capacitor (4), the energy storage limit is that the voltage of super capacitor (4) reaches its rated value;
When batteries to store energy is not enough, super capacitor (4) is storage battery (7) charging through auxiliary power changer (5);
When engine thermal is started, the energy storage of super capacitor (4) is through by-pass switch (6) and rectification/inverter (2), or main power inverter (3) and rectification/inverter (2) supply power-assisted electric generator (1) electric operation.
2. the automobile power-assisted power generating system of a kind of composite energy storage according to claim 1, it is characterized in that: when power-assisted power generating system contains starter, this system is made up of power-assisted electric generator (1), rectification/inverter (2), main power inverter (3), super capacitor (4), auxiliary power changer (5), by-pass switch (6), storage battery (7), microprocessor unit (8); Wherein, by T21 ~ T26 totally six binistors connect to form the three phase rectifier/inversion bridge circuit with three brachium pontis, each brachium pontis mid point is connected with the three-phase windings of power-assisted electric generator (1) respectively; Main power inverter (3) is formed by connecting by T31, T32 two binistors and inductance L 3, forms bidirectional Buck-Boost converter; Auxiliary power changer (5) is formed by connecting by switching element T 5, diode D51, D52 and inductance L 5, and T5, D51 and L5 form buck converter jointly; Auxiliary power changer is also provided with diode D52 in (5), forward is connected between super capacitor (4) and switching element T 5, effect avoids the super capacitor (4) when storage battery (7) and low voltage to form discharge loop to cause energy loss, and diode D52 also can substitute with binistor; By-pass switch (6) is realized by switching element T 6;
During driving engine (12) cold start, storage battery (7) is starter (9) power supply, T5 in auxiliary power changer (5) is in off state, and between super capacitor (4) and storage battery (7), noenergy exchanges; After driving engine (12) starts, power-assisted electric generator (1) is by rectification/inverter (2) and main power inverter (3), or rectification/inverter (2) and by-pass switch (6) carry out precharge for super capacitor (4), until reach power-assisted electric generator (1) for driving engine (12) to provide power-assisted required voltage; In pre-charge process, when super capacitor (4) initial voltage is very low, by-pass switch (6) turns off, and main power inverter (3) works in by the decompression mode of rectification/inverter (2) to super capacitor (4) direction; When super capacitor (4) voltage and rectification/inverter (2) output voltage close to time, by-pass switch (6) closes, and the main power inverter of bypass (3), can reduce system power dissipation; After precharge completes, auxiliary power changer (5) enters normal step-down mode of operation;
Power-assisted electric generator (1) for driving engine (12) power-assisted is provided time, by-pass switch (6) turns off, main power inverter (3) is in by the pressure-increasning state of super capacitor (4) to rectification/inverter (2), and the energy storage of super capacitor (4) is through main power inverter (3) and rectification/inverter (2) supply power-assisted electric generator (1) electric operation;
When vehicle sliding, braking or super capacitor (4) energy storage are not enough, power-assisted electric generator (1) all works in generating state, by rectification/inverter (2) and main power inverter (3), or rectification/inverter (2) and by-pass switch (6) are super capacitor (4) charging; When super capacitor (4) voltage is lower, by-pass switch (6) turns off, and main power inverter (3) works in by the decompression mode of rectification/inverter (2) to super capacitor (4) direction; When super capacitor (4) voltage and rectification/inverter (2) output voltage close to time, by-pass switch (6) closes;
During driving engine (12) hot start, the energy storage of super capacitor (4) is through main power inverter (3) and rectification/inverter (2), or by-pass switch (6) and rectification/inverter (2) supply power-assisted electric generator (1) electric operation.
3. the automobile power-assisted power generating system of a kind of composite energy storage according to claim 1, it is characterized in that: when this power-assisted power generating system is without starter, this system is made up of power-assisted electric generator (1), rectification/inverter (2), main power inverter (3), super capacitor (4), auxiliary power changer (5), by-pass switch (6), storage battery (7), microprocessor unit (8); Wherein, by T21 ~ T26 totally six binistors connect to form the three phase rectifier/inversion bridge circuit with three brachium pontis, each brachium pontis mid point is connected with the three-phase windings of power-assisted electric generator (1) respectively; Main power inverter (3) is formed by connecting by diode D31, switching element T 32 and inductance L 3, forms booster converter; Auxiliary power changer (5) is formed by connecting by switching element T 51 ~ T53, diode D51 and inductance L 5, and T51, T52 and L5 form reversible transducer jointly, and T53, D51 and L5 form buck converter jointly; By-pass switch (6) is realized by switching element T 6;
Before driving engine (12) cold start, storage battery (7) is super capacitor (4) precharge by auxiliary power changer (5); When super capacitor (4) initial voltage is very low, switching element T 51 in auxiliary power changer (5), T52 turn off, and the buck converter that T53, D51 and L5 are formed works in by the decompression mode of storage battery (7) to super capacitor (4) direction; When super capacitor (4) and storage battery (7) voltage close to time, T53 constant conduction, the reversible transducer that T51, T52 and L5 are formed works in by the boost mode of storage battery (7) to super capacitor (4) direction, until reach power-assisted electric generator (1) fire an engine (12) required voltage;
When driving engine (12) cold start and hot start, the energy storage of super capacitor (4) is through main power inverter (3) and rectification/inverter (2), or by-pass switch (6) and rectification/inverter (2) supply power-assisted electric generator (1) electric operation;
When vehicle sliding, braking or super capacitor (4) energy storage are not enough, power-assisted electric generator (1) all works in generating state, is super capacitor (4) charging by rectification/inverter (2), by-pass switch (6);
Power-assisted electric generator (1) for driving engine power-assisted is provided time, by-pass switch (6) turns off, main power inverter (3) is in by the pressure-increasning state of super capacitor (4) to rectification/inverter (2), and the energy storage of super capacitor (4) is through main power inverter (3) and rectification/inverter (2) supply power-assisted electric generator (1) electric operation;
When storage battery (7) energy storage is not enough, super capacitor (4) is its charging through auxiliary power changer (5); Switching element T 53 in auxiliary power changer (5) turns off, and the reversible transducer that T51, T52 and L5 are formed works in by the decompression mode of super capacitor (4) to storage battery (7) direction.
4. the automobile power-assisted power generating system of a kind of composite energy storage according to claim 1, it is characterized in that: by-pass switch (6) can save in main power inverter (3) the power-assisted power generating system that is bidirectional Buck-Boost converter structure, only coordinates by main power inverter (3) and also can complete correlation function.
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| CN101257225A (en) * | 2007-12-18 | 2008-09-03 | 华南理工大学 | Brushless dc electric generator / electric motor system for cars |
| DE102009044211A1 (en) * | 2008-10-13 | 2010-04-15 | General Electric Co. | Energy management system for improving the efficiency of electric and hybrid powertrains |
| CN201601512U (en) * | 2010-01-15 | 2010-10-06 | 合肥科振实业发展有限公司 | Fuel-cell power generation control device for electric tour bus |
| CN201914107U (en) * | 2010-12-30 | 2011-08-03 | 西安交通大学苏州研究院 | Hybrid electric vehicle control system based on super capacitor |
| CN102271981A (en) * | 2009-01-12 | 2011-12-07 | 法雷奥电机设备公司 | Method for controlling an energy storage unit in a vehicle micro-hybrid system |
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| CN101257225A (en) * | 2007-12-18 | 2008-09-03 | 华南理工大学 | Brushless dc electric generator / electric motor system for cars |
| DE102009044211A1 (en) * | 2008-10-13 | 2010-04-15 | General Electric Co. | Energy management system for improving the efficiency of electric and hybrid powertrains |
| CN102271981A (en) * | 2009-01-12 | 2011-12-07 | 法雷奥电机设备公司 | Method for controlling an energy storage unit in a vehicle micro-hybrid system |
| CN201601512U (en) * | 2010-01-15 | 2010-10-06 | 合肥科振实业发展有限公司 | Fuel-cell power generation control device for electric tour bus |
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