CN106004501A - Power battery and super-capacitor connection system and control method - Google Patents
Power battery and super-capacitor connection system and control method Download PDFInfo
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- CN106004501A CN106004501A CN201610529666.5A CN201610529666A CN106004501A CN 106004501 A CN106004501 A CN 106004501A CN 201610529666 A CN201610529666 A CN 201610529666A CN 106004501 A CN106004501 A CN 106004501A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L50/00—Electric propulsion with power supplied within the vehicle
- B60L50/40—Electric propulsion with power supplied within the vehicle using propulsion power supplied by capacitors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L50/00—Electric propulsion with power supplied within the vehicle
- B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L2260/00—Operating Modes
- B60L2260/10—Temporary overload
- B60L2260/16—Temporary overload of electrical drive trains
- B60L2260/162—Temporary overload of electrical drive trains of electrical cells or capacitors
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
Abstract
The invention discloses a power battery and super-capacitor connection system and a control method. The connection of a super-capacitor pack and a power battery pack is realized through a first thyristor, a second thyristor and a third thyristor; an information state of a whole vehicle is obtained by a control module through a CAN/LIN (Controller Area Network/Local Internet Network) bus or a signal line; the information state and the acquired voltage of the power battery pack, voltage of the super-capacitor pack and voltage of the busbar are judged together, and the on-offs of the first thyristor, the second thyristor and the third thyristor are controlled; effective distribution and smooth switching of energy are realized so that the current impact is reduced and the reliability of the system is improved; the starting acceleration and slope climbing performances and the braking downhill energy recycling of a whole vehicle are improved and the effective utilization rate of a super-capacitor is improved.
Description
Technical field
The present invention relates to field of hybrid electric vehicles, be specifically related to a kind of electrokinetic cell and super capacitor connection system and control method.
Background technology
Our times energy problem is day by day serious, and people are finding various solutions, tap a new source of energy, improve energy utilization rate；Hybrid electric vehicle industry is in the ascendant, and it has energy-saving and environmental protection and the feature such as efficiently, is paid close attention to widely and pays much attention to；Dynamical system therein is the core of hybrid vehicle, improves the capacity usage ratio of dynamical system, extends its service life, energy-conserving and environment-protective, the core focus that we pay close attention to just.
The existing hybrid vehicle of China and corresponding scheme typically take pure battery or the method for purely capacitive storage electric energy, when vehicle travels in city, can start continually, accelerate and brake, when starting and accelerate, electromotor can require a lot of energy moment, battery now needs to provide big electric current, so can cause the damage of battery, shorten its service life；When engine braking, conventional batteries can not efficient recovery energy, substantial amounts of braking energy is to be rubbed by brake block, produce heat and run off.
Current system uses diode to carry out coupling of electrokinetic cell and super capacitor with contact switch or changed power device DC/DC, energy regenerating and super capacitor charging can be carried out, but connection system is complicated, volume is big, relatively costly to use changed power device DC/DC connection electrokinetic cell and super capacitor may result in, and energy regenerating and startup energy auxiliary are held quantitative limitation by changed power device DC/DC；Being used alone diode and contact switch connects, the voltage of super capacitor will be clamped to the voltage of electrokinetic cell, causes super capacitor utilization rate the lowest；And owing to electrokinetic cell and super capacitor are all capacitive loads, rush of current is bigger during contact switch action, causes contact switch service life reduction, be easily damaged so that the reliability of system reduces.
Summary of the invention
It is an object of the invention to provide and mix, for super capacitor, the electric automobile electricity electricity constituted with electrokinetic cell and mix dynamical system, promote car load starting and accelerate grade climbing performance and braking descending energy regenerating performance and a kind of electrokinetic cell and super capacitor connection system and the control method of super capacitor availability can be promoted.
The present invention is achieved through the following technical solutions: a kind of electrokinetic cell and super capacitor connection system, including the first IGCT, second IGCT, 3rd IGCT, first voltage detection module, second voltage detection module, tertiary voltage detection module, switch, resistance, control module, motor, electric machine controller, the power battery pack of some electrokinetic cells composition and the super capacitor group of some super capacitors composition, described control module connects the first voltage detection module respectively, second voltage detection module and tertiary voltage detection module, described first voltage detection module connects power battery pack and share in the voltage of detection power battery pack；Described second voltage detection module connects super capacitor group for detecting the voltage of super capacitor group；Described tertiary voltage detection module connects the electric machine controller being connected with motor for detecting the voltage of bus；Described control module is also respectively connected to the gate pole of the first IGCT, the gate pole of the second IGCT and the gate pole of the 3rd IGCT；The anode of described first IGCT is connected to the positive pole of power battery pack, the negative electrode of described first IGCT is connected to one end of switch, one end of described switch is also connected to the anode of the second IGCT, the anode of described second IGCT is also connected to the negative electrode of the 3rd IGCT, the negative electrode of described 3rd IGCT is also connected to electric machine controller, the other end of described switch is connected to one end of resistance, the other end of described resistance is connected to the negative electrode of the second IGCT, the anode of described 3rd IGCT is also connected to the negative electrode of the second IGCT, the negative electrode of described second IGCT is connected to one end of super capacitor group, the negative pole of described power battery pack is also connected to the other end of super capacitor group, the other end of described super capacitor group is also connected to electric machine controller；Wireless module it is additionally provided with for receiving transmission information in described control module；Described resistance is preliminary filling resistance；Described first IGCT, the second IGCT and the 3rd IGCT are all unilateral gate pole cut-off crystal brake tube；Described control module obtains the information state of car load also by CAN/LIN bus or holding wire.
A kind of electrokinetic cell and super capacitor connection system control method, the maximum operating voltage of super capacitor group is Vmax and the ceiling voltage optionally greater than power battery pack, the minimum running voltage of super capacitor group is Vmin, and the pre-charge pressure of super capacitor group is Vpc, and step is as follows:
A) detection vehicle-state, vehicle remains static, and improve step b, and vehicle is in starting state and then enters step c, and vehicle is in normal transport condition and then enters step d；
B) vehicle remains static, then control module passes through the first voltage detection module, second voltage detection module and tertiary voltage detection module Real-time Collection detection power battery pack, super capacitor group and busbar voltage also obtain the information state of car load also by CAN/LIN bus or holding wire, if the voltage of super capacitor group is less than pre-charge pressure Vpc set in advance, then enable the first IGCT, decapacitation the second IGCT and the 3rd IGCT also close switch, preliminary filling resistance is used to charge super capacitor group until the voltage of super capacitor group reaches pre-charge pressure Vpc, enter step e；If the voltage of super capacitor group is not less than pre-charge pressure Vpc set in advance, then also into step e；
C) vehicle is in starting state, then control module passes through the first voltage detection module, second voltage detection module and tertiary voltage detection module Real-time Collection detection power battery pack, super capacitor group and busbar voltage also obtain the information state of car load also by CAN/LIN bus or holding wire, if the voltage of super capacitor group higher than the minimum running voltage that sets as Vmin, then forbid the first IGCT and the second IGCT, enable the 3rd IGCT and disconnect switch, using super capacitor group that energy is provided separately completely drives motor thus towing vehicle to move by electric machine controller until the depleted of energy of super capacitor group, the running voltage making super capacitor group reaches minimum running voltage Vmin, enter step f；If the voltage of super capacitor group is less than minimum running voltage Vmin set, then enter step g；
D) vehicle is in normal transport condition, then control module is by the first voltage detection module, the second voltage detection module and tertiary voltage detection module Real-time Collection detection power battery pack, super capacitor group and busbar voltage the information state obtaining car load also by CAN/LIN bus or holding wire, if car braking situation or anxious accelerated condition do not occur, then keep normal vehicle operation；If car braking situation occurs, then enter step h, if vehicle urgency accelerated condition occurs, then enter step i；
E) voltage of super capacitor group is not less than pre-charge pressure Vpc set in advance, then enable the second IGCT and the first IGCT decapacitation the 3rd IGCT, disconnect switch, power battery pack is allowed to use the first IGCT and the second IGCT to carry out in parallel with super capacitor, power battery pack is allowed to charge directly to super capacitor group, make power battery pack keep consistent with super capacitor group voltage, terminate flow process and wait vehicle launch signal；
F) running voltage of super capacitor group reaches minimum running voltage Vmin, then enable the first IGCT, busbar voltage is caused to be higher than the voltage of super capacitor group, allow for the 3rd IGCT due to cathode voltage automatic cut-off higher than cathode voltage, cause power battery pack to drive motor to make normal vehicle operation separately through the first IGCT conveying energy to electric machine controller, enter step d；
G) voltage of super capacitor group is less than minimum running voltage Vmin set, then think that super capacitor group is uncharged, just enable the first IGCT, forbid the second IGCT and the 3rd IGCT, Guan Bi switch, there is provided energy to start vehicle by power battery pack enter normal traveling and be pre-charged to super capacitor group, entering step d；
H) there is braking conditions in vehicle, due to motor by electric machine controller to bus feedback energy, busbar voltage will be above power battery voltage and super capacitor group voltage, first IGCT and the 3rd IGCT due to cathode voltage higher than cathode voltage by automatic cut-off, enable the second IGCT immediately, the energy of all feedbacks is all recovered in super capacitor group, until braking conditions terminates；Detect whether vehicle speed is 0 again, if vehicle speed is 0, enter static charging process step b；If vehicle speed is not 0, return normal driving process step d；
I) there is anxious accelerated condition in vehicle, the first IGCT and the 3rd IGCT is then kept to be in enabled state, owing to anxious acceleration causes bus current big, therefore busbar voltage will decline, when busbar voltage drops to super-capacitor voltage, the 3rd IGCT will turn on so that super capacitor group and power battery pack provide energy to drive vehicle simultaneously, until anxious accelerated condition terminates, return normal driving process step d.
In described step b and step e, control module detects vehicle launch signal in real time, if vehicle launch signal being detected, enters in step c；During normal vehicle operation, keeping the 3rd IGCT is enabled state；Described step e medium power set of cells uses the first IGCT and the second IGCT to carry out in parallel with super capacitor, and the first IGCT and the second IGCT are equivalent to two diodes in parallels；Time during in described step h, the energy of all feedbacks is all recovered to super capacitor group and decapacitation the first IGCT signal but keep the 3rd IGCT signal in enabled state.
The present invention passes through the first IGCT, second IGCT and the 3rd IGCT carry out the connection of super capacitor group and power battery pack, control module obtains the information state of car load by CAN/LIN bus or holding wire, and with the power battery voltage collected, super capacitor group voltage judges together with busbar voltage, control the first IGCT, second IGCT and the break-make of the 3rd IGCT, realize effectively distributing and taking over seamlessly of energy, rush of current is reduced, system reliability is allowed to improve, promote car load starting and accelerate grade climbing performance and braking descending energy regenerating, promote super capacitor availability.
The invention have benefit that: 1) super capacitor group and be all that nature turns off and conducting naturally during power battery pack energy switching, switching is smooth, and rush of current is little, system reliability height；2) super capacitor group can use voltage range width, also can work in the case of more much lower than power battery voltage, can play the effect of super capacitor group to greatest extent；3) when vehicle launch and braking, all by the energy needed for super capacitor group output vehicle launch and the energy of recovery braking, electrokinetic cell only provides energy when normal traveling, it is to avoid frequent high current charge-discharge, effectively protects system lifetim；4) simple in construction controls simplicity, and cost reduces.
Accompanying drawing explanation
Fig. 1 is the system connection diagram of the present invention.
Fig. 2 is the system job control flow chart of the present invention.
Detailed description of the invention
Below in conjunction with the accompanying drawings with detailed description of the invention, the invention will be further described.
See Fig. 1 to Fig. 2, a kind of electrokinetic cell and super capacitor connection system, including the first IGCT T1, second IGCT T2, 3rd IGCT T3, first voltage detection module, second voltage detection module, tertiary voltage detection module, switch S1, resistance R1, control module, motor, electric machine controller, the power battery pack of some electrokinetic cells composition and the super capacitor group of some super capacitors composition, described control module connects the first voltage detection module respectively, second voltage detection module and tertiary voltage detection module, described first voltage detection module connects power battery pack and share in the voltage of detection power battery pack；Described second voltage detection module connects super capacitor group for detecting the voltage of super capacitor group；Described tertiary voltage detection module connects the electric machine controller being connected with motor for detecting the voltage of bus；Described control module is also respectively connected to the gate pole of the first IGCT T1, the gate pole of the second IGCT T2 and the gate pole of the 3rd IGCT T3；nullThe anode of described first IGCT T1 is connected to the positive pole of power battery pack，The negative electrode of described first IGCT T1 is connected to switch one end of S1，One end of described switch S1 is also connected to the anode of the second IGCT T2，The anode of described second IGCT T2 is also connected to the negative electrode of the 3rd IGCT T3，The negative electrode of described 3rd IGCT T3 is also connected to electric machine controller，The other end of described switch S1 is connected to one end of resistance R1，The other end of described resistance R1 is connected to the negative electrode of the second IGCT T2，The anode of described 3rd IGCT T3 is also connected to the negative electrode of the second IGCT T2，The negative electrode of described second IGCT T2 is connected to one end of super capacitor group，The negative pole of described power battery pack is also connected to the other end of super capacitor group，The other end of described super capacitor group is also connected to electric machine controller；Wireless module it is additionally provided with for receiving transmission information in described control module；Described resistance R1 is preliminary filling resistance；Described first IGCT T1, the second IGCT T2 and the 3rd IGCT T3 are unilateral gate pole cut-off crystal brake tube；Described control module obtains the information state of car load also by CAN/LIN bus or holding wire.
A kind of electrokinetic cell and super capacitor connection system control method, the maximum operating voltage of super capacitor group is Vmax and the ceiling voltage optionally greater than power battery pack, the minimum running voltage of super capacitor group is Vmin, and the pre-charge pressure of super capacitor group is Vpc, and step is as follows:
A) detection vehicle-state, vehicle remains static, and improve step b, and vehicle is in starting state and then enters step c, and vehicle is in normal transport condition and then enters step d；
B) vehicle remains static, then control module passes through the first voltage detection module, second voltage detection module and tertiary voltage detection module Real-time Collection detection power battery pack, super capacitor group and busbar voltage also obtain the information state of car load also by CAN/LIN bus or holding wire, if the voltage of super capacitor group is less than pre-charge pressure Vpc set in advance, then enable the first IGCT T1, decapacitation the second IGCT T2 and the 3rd IGCT T3 also closes switch S1, preliminary filling resistance R1 is used to charge super capacitor group until the voltage of super capacitor group reaches pre-charge pressure Vpc, enter step e；If the voltage of super capacitor group is not less than pre-charge pressure Vpc set in advance, then also into step e；
C) vehicle is in starting state, then control module passes through the first voltage detection module, second voltage detection module and tertiary voltage detection module Real-time Collection detection power battery pack, super capacitor group and busbar voltage also obtain the information state of car load also by CAN/LIN bus or holding wire, if the voltage of super capacitor group higher than the minimum running voltage that sets as Vmin, then forbid the first IGCT T1 and the second IGCT T2, enable the 3rd IGCT T3 and disconnect switch S1, using super capacitor group that energy is provided separately completely drives motor thus towing vehicle to move by electric machine controller until the depleted of energy of super capacitor group, the running voltage making super capacitor group reaches minimum running voltage Vmin, enter step f；If the voltage of super capacitor group is less than minimum running voltage Vmin set, then enter step g；
D) vehicle is in normal transport condition, then control module is by the first voltage detection module, the second voltage detection module and tertiary voltage detection module Real-time Collection detection power battery pack, super capacitor group and busbar voltage the information state obtaining car load also by CAN/LIN bus or holding wire, if car braking situation or anxious accelerated condition do not occur, then keep normal vehicle operation；If car braking situation occurs, then enter step h, if vehicle urgency accelerated condition occurs, then enter step i；
E) voltage of super capacitor group is not less than pre-charge pressure Vpc set in advance, then enable the second IGCT T2 and the first IGCT T1 decapacitation the 3rd IGCT T3, disconnect switch S1, power battery pack is allowed to use the first IGCT T1 and the second IGCT T2 to carry out in parallel with super capacitor, power battery pack is allowed to charge directly to super capacitor group, make power battery pack keep consistent with super capacitor group voltage, terminate flow process and wait vehicle launch signal；
F) running voltage of super capacitor group reaches minimum running voltage Vmin, then enable the first IGCT T1, busbar voltage is caused to be higher than the voltage of super capacitor group, allow for the 3rd IGCT T3 due to cathode voltage automatic cut-off higher than cathode voltage, cause power battery pack to drive motor to make normal vehicle operation separately through the first IGCT T1 conveying energy to electric machine controller, enter step d；
G) voltage of super capacitor group is less than minimum running voltage Vmin set, then think that super capacitor group is uncharged, just enable the first IGCT T1, forbid the second IGCT T2 and the 3rd IGCT T3, Guan Bi switch S1, there is provided energy to start vehicle by power battery pack enter normal traveling and be pre-charged to super capacitor group, entering step d；
H) there is braking conditions in vehicle, due to motor by electric machine controller to bus feedback energy, busbar voltage will be above power battery voltage and super capacitor group voltage, first IGCT T1 and the 3rd IGCT T3 is higher than cathode voltage by automatic cut-off due to cathode voltage, enable the second IGCT T2 immediately, the energy of all feedbacks is all recovered in super capacitor group, until braking conditions terminates；Detect whether vehicle speed is 0 again, if vehicle speed is 0, enter static charging process step b；If vehicle speed is not 0, return normal driving process step d；
I) there is anxious accelerated condition in vehicle, the first IGCT T1 and the 3rd IGCT T3 is then kept to be in enabled state, owing to anxious acceleration causes bus current big, therefore busbar voltage will decline, when busbar voltage drops to super-capacitor voltage, the 3rd IGCT T3 will turn on so that super capacitor group and power battery pack provide energy to drive vehicle simultaneously, until anxious accelerated condition terminates, return normal driving process step d.
In described step b and step e, control module detects vehicle launch signal in real time, if vehicle launch signal being detected, enters in step c；During normal vehicle operation, keeping the 3rd IGCT T3 is enabled state；Described step e medium power set of cells uses the first IGCT T1 and the second IGCT T2 to carry out in parallel with super capacitor, and the first IGCT T1 and the second IGCT T2 is equivalent to two diodes in parallels；Time during in described step h, the energy of all feedbacks is all recovered to super capacitor group and decapacitation the first IGCT T1 signal but keep the 3rd IGCT T3 signal in enabled state.
In present embodiment, the connection of super capacitor group and power battery pack is carried out by the first IGCT T1, the second IGCT T2 and the 3rd IGCT T3, control module obtains the information state of car load by CAN/LIN bus or holding wire, and carry out comprehensive descision together with the power battery voltage collected, super capacitor group voltage and busbar voltage, control the first IGCT T1, the second IGCT T2 and the break-make of the 3rd IGCT T3, it is achieved effectively the distributing and take over seamlessly of energy；The voltage of super capacitor group and power battery pack sets according to actual vehicle, the maximum operating voltage Vmax of super capacitor group can configure according to different automobile types and different super capacitor group optionally greater than the ceiling voltage of power battery pack, minimum running voltage Vmin and pre-charge pressure Vpc.
In present embodiment, when vehicle remains static, control module Real-time Collection power battery pack, super capacitor group and busbar voltage, and obtain whole vehicle state by bus or other holding wires, if super-capacitor voltage is less than pre-charge voltage Vpc set in advance, then enables the first IGCT T1 and close switch S1, using preliminary filling resistance R1 that super capacitor group is charged, when reaching pre-charge pressure Vpc, enable the second IGCT T2 and bypass preliminary filling resistance R1 directly to the charging of super capacitor group；When being charged to lower state, super capacitor group is equivalent to power battery pack use the first IGCT T1 and two diodes of the second IGCT T2 to carry out in parallel, makes two energy storage device voltages substantially keep consistent；During whole charging or standing, if vehicle launch signal is effective, then charging process terminates and enters start-up course.
In present embodiment, after vehicle enters start-up course, control module is wanted Real-time Collection power battery pack, super capacitor group and busbar voltage equally and obtains whole vehicle state by bus or other holding wires, if super capacitor group voltage is higher than minimum running voltage Vmin set, then forbid that the first IGCT T1 and the second IGCT T2 enable the 3rd IGCT T3, use super capacitor group that energy is provided separately and drive motor by electric machine controller thus towing vehicle motion, it is to avoid the frequent heavy-current discharge of electrokinetic cell affects the life-span；The first IGCT T1 is enabled when super capacitor group depleted of energy that is voltage is close to minimum running voltage Vmin, now busbar voltage will be above super capacitor group voltage, the automatic cut-off higher than cathode voltage of 3rd IGCT T3 cathode voltage, is provided separately energy by power battery pack and drives vehicle to travel；If judging super capacitor group brownout after the startup stage of entrance, then it is assumed that super capacitor group is uncharged, the most directly enabling the first IGCT T1 power battery pack provides energy to start vehicle；Entering normal row after vehicle launch and cross journey, during normal driving process, keeping the 3rd IGCT T3 is enabled state, and now the 3rd IGCT T3 cathode voltage is higher than cathode voltage, and enable signal is opened the 3rd IGCT T3 and also do not turned on.
In present embodiment, after vehicle enters normal driving process, braking or anxious accelerated condition can often occur；When car braking, namely during acceleration and deceleration, due to motor by electric machine controller to bus feedback energy, busbar voltage will be above power battery voltage and super capacitor group voltage, first IGCT T1 and the 3rd IGCT T3 is by automatic cut-off, enable the second IGCT T2 the most immediately, the energy of the most all feedbacks is all recovered in super capacitor group, owing to super capacitor merit is physics energy storage, rate density is the highest, therefore can realize the most quickly energy regenerating, and avoid electrokinetic cell to affect the life-span because of frequent large current charge；When the anxious acceleration of vehicle, owing to bus current is big, busbar voltage will decline, when reaching super-capacitor voltage, 3rd IGCT T3 will turn on, and the control end of the 3rd IGCT T3 has enable signal, super capacitor group and power battery pack to provide energy to drive vehicle always simultaneously, reduce electrokinetic cell burden and avoid the frequent heavy-current discharge of electrokinetic cell to affect the life-span.
In present embodiment, vehicle is in normal driving process, and vehicle stops due to braking, enters static charging process；Can also be owing to returning normal driving process after anxious acceleration.
In present embodiment, control module can use microcontroller and peripheral circuit composition to realize function so that cost reduces.
In present embodiment, if the highest to cost requirement, low power blood pressure lowering DC/DC can be used to replace switch S1 and preliminary filling resistance R1, for realizing efficient, quick, the low-loss charging of super capacitor group.
In present embodiment, super capacitor group is during assistant starting, and voltage can reduce the Vmin more much lower than electrokinetic cell voltage, and concrete numerical value is set according to different automobile types difference super capacitor group, stores energy theorem 0.5C (V according to super capacitor groupmax 2-Vmin 2) (in formula, C represents super capacitor pool-size, unit farad), super capacitor operating voltage range is considerably increased by native system, the energy making storage is greatly promoted, super capacitor group is made full use of, while promoting vehicle launch and energy regenerating effect, also effectively reduces cost；And during the distribution of whole energy controls, take full advantage of unilateral gate pole cut-off crystal brake tube forward can control open the characteristic turned off and reversely end and coordinate control method, achieving seamlessly transitting of energy distribution switching, non-impact current, system reliability is high.
Protection scope of the present invention includes but not limited to that embodiment of above, protection scope of the present invention are as the criterion with claims, replacement that any those skilled in the art making this technology is readily apparent that, deforms, improves and each fall within protection scope of the present invention.
Claims (9)
1. an electrokinetic cell and super capacitor connection system, it is characterized in that: include the first IGCT (T1), second IGCT (T2), 3rd IGCT (T3), first voltage detection module, second voltage detection module, tertiary voltage detection module, switch (S1), resistance (R1), control module, motor, electric machine controller, the power battery pack of some electrokinetic cells composition and the super capacitor group of some super capacitors composition, described control module connects the first voltage detection module respectively, second voltage detection module and tertiary voltage detection module, described first voltage detection module connects power battery pack and share in the voltage of detection power battery pack；Described second voltage detection module connects super capacitor group for detecting the voltage of super capacitor group；Described tertiary voltage detection module connects the electric machine controller being connected with motor for detecting the voltage of bus；Described control module is also respectively connected to the gate pole of the first IGCT (T1), the gate pole of the second IGCT (T2) and the gate pole of the 3rd IGCT (T3)；nullThe anode of described first IGCT (T1) is connected to the positive pole of power battery pack，The negative electrode of described first IGCT (T1) is connected to switch the one end of (S1)，One end of described switch (S1) is also connected to the anode of the second IGCT (T2)，The anode of described second IGCT (T2) is also connected to the negative electrode of the 3rd IGCT (T3)，The negative electrode of described 3rd IGCT (T3) is also connected to electric machine controller，The other end of described switch (S1) is connected to one end of resistance (R1)，The other end of described resistance (R1) is connected to the negative electrode of the second IGCT (T2)，The anode of described 3rd IGCT (T3) is also connected to the negative electrode of the second IGCT (T2)，The negative electrode of described second IGCT (T2) is connected to one end of super capacitor group，The negative pole of described power battery pack is also connected to the other end of super capacitor group，The other end of described super capacitor group is also connected to electric machine controller，Wireless module it is additionally provided with for receiving transmission information in described control module.
A kind of electrokinetic cell the most according to claim 1 and super capacitor connection system, it is characterised in that: described resistance (R1) is preliminary filling resistance.
A kind of electrokinetic cell the most according to claim 1 and super capacitor connection system, it is characterised in that: described first IGCT (T1), the second IGCT (T2) and the 3rd IGCT (T3) they are all unilateral gate pole cut-off crystal brake tube.
A kind of electrokinetic cell the most according to claim 1 and super capacitor connection system, it is characterised in that: described control module obtains the information state of car load also by CAN/LIN bus or holding wire.
5. an electrokinetic cell and super capacitor connection system control method, it is characterized in that, the maximum operating voltage of super capacitor group is Vmax and the ceiling voltage optionally greater than power battery pack, the minimum running voltage of super capacitor group is Vmin, the pre-charge pressure of super capacitor group is Vpc, and step is as follows:
A) detection vehicle-state, vehicle remains static, and improve step b, and vehicle is in starting state and then enters step c, and vehicle is in normal transport condition and then enters step d；
B) vehicle remains static, then control module passes through the first voltage detection module, second voltage detection module and tertiary voltage detection module Real-time Collection detection power battery pack, super capacitor group and busbar voltage also obtain the information state of car load also by CAN/LIN bus or holding wire, if the voltage of super capacitor group is less than pre-charge pressure Vpc set in advance, then enable the first IGCT (T1), decapacitation the second IGCT (T2) and the 3rd IGCT (T3) also close switch (S1), preliminary filling resistance (R1) is used to charge super capacitor group until the voltage of super capacitor group reaches pre-charge pressure Vpc, enter step e；If the voltage of super capacitor group is not less than pre-charge pressure Vpc set in advance, then also into step e；
C) vehicle is in starting state, then control module passes through the first voltage detection module, second voltage detection module and tertiary voltage detection module Real-time Collection detection power battery pack, super capacitor group and busbar voltage also obtain the information state of car load also by CAN/LIN bus or holding wire, if the voltage of super capacitor group higher than the minimum running voltage that sets as Vmin, then forbid the first IGCT (T1) and the second IGCT (T2), enable the 3rd IGCT (T3) and disconnect switch (S1), using super capacitor group that energy is provided separately completely drives motor thus towing vehicle to move by electric machine controller until the depleted of energy of super capacitor group, the running voltage making super capacitor group reaches minimum running voltage Vmin, enter step f；If the voltage of super capacitor group is less than minimum running voltage Vmin set, then enter step g；
D) vehicle is in normal transport condition, then control module is by the first voltage detection module, the second voltage detection module and tertiary voltage detection module Real-time Collection detection power battery pack, super capacitor group and busbar voltage the information state obtaining car load also by CAN/LIN bus or holding wire, if car braking situation or anxious accelerated condition do not occur, then keep normal vehicle operation；If car braking situation occurs, then enter step h, if vehicle urgency accelerated condition occurs, then enter step i；
E) voltage of super capacitor group is not less than pre-charge pressure Vpc set in advance, then enable the second IGCT (T2) and the first IGCT (T1) decapacitation the 3rd IGCT (T3), disconnect switch (S1), power battery pack is allowed to use the first IGCT (T1) and the second IGCT (T2) to carry out in parallel with super capacitor, power battery pack is allowed to charge directly to super capacitor group, make power battery pack keep consistent with super capacitor group voltage, terminate flow process and wait vehicle launch signal；
F) running voltage of super capacitor group reaches minimum running voltage Vmin, then enable the first IGCT (T1), busbar voltage is caused to be higher than the voltage of super capacitor group, allow for the 3rd IGCT (T3) due to cathode voltage automatic cut-off higher than cathode voltage, cause power battery pack to drive motor to make normal vehicle operation separately through the first IGCT (T1) conveying energy to electric machine controller, enter step d；
G) voltage of super capacitor group is less than minimum running voltage Vmin set, then think that super capacitor group is uncharged, just enable the first IGCT (T1), forbid the second IGCT (T2) and the 3rd IGCT (T3), Guan Bi switch (S1), there is provided energy to start vehicle by power battery pack enter normal traveling and be pre-charged to super capacitor group, entering step d；
H) there is braking conditions in vehicle, due to motor by electric machine controller to bus feedback energy, busbar voltage will be above power battery voltage and super capacitor group voltage, first IGCT (T1) and the 3rd IGCT (T3) due to cathode voltage higher than cathode voltage by automatic cut-off, enable the second IGCT (T2) immediately, the energy of all feedbacks is all recovered in super capacitor group, until braking conditions terminates；Detect whether vehicle speed is 0 again, if vehicle speed is 0, enter static charging process step b；If vehicle speed is not 0, return normal driving process step d；
I) there is anxious accelerated condition in vehicle, the first IGCT (T1) and the 3rd IGCT (T3) is then kept to be in enabled state, owing to anxious acceleration causes bus current big, therefore busbar voltage will decline, when busbar voltage drops to super-capacitor voltage, the 3rd IGCT (T3) will turn on so that super capacitor group and power battery pack provide energy to drive vehicle simultaneously, until anxious accelerated condition terminates, return normal driving process step d.
A kind of electrokinetic cell the most according to claim 5 and super capacitor connection system control method, it is characterised in that: in described step b and step e, control module detects vehicle launch signal in real time, if vehicle launch signal being detected, enters in step c.
A kind of electrokinetic cell the most according to claim 5 and super capacitor connection system control method, it is characterised in that: during normal vehicle operation, keeping the 3rd IGCT (T3) is enabled state.
A kind of electrokinetic cell the most according to claim 5 and super capacitor connection system control method, it is characterized in that: described step e medium power set of cells uses the first IGCT (T1) and the second IGCT (T2) to carry out in parallel with super capacitor, and the first IGCT (T1) and the second IGCT (T2) are equivalent to two diodes in parallels.
A kind of electrokinetic cell the most according to claim 5 and super capacitor connection system control method, it is characterised in that: time during in described step h, the energy of all feedbacks is all recovered to super capacitor group and decapacitation the first IGCT (T1) signal but keep the 3rd IGCT (T3) signal in enabled state.
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| CN107482744A (en) * | 2017-07-06 | 2017-12-15 | 浙江大学 | A kind of fork truck power source service life protection device |
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