CN106356575B - The charge control method of lead-acid accumulator in hybrid vehicle - Google Patents
The charge control method of lead-acid accumulator in hybrid vehicle Download PDFInfo
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- CN106356575B CN106356575B CN201610885667.3A CN201610885667A CN106356575B CN 106356575 B CN106356575 B CN 106356575B CN 201610885667 A CN201610885667 A CN 201610885667A CN 106356575 B CN106356575 B CN 106356575B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/44—Methods for charging or discharging
- H01M10/446—Initial charging measures
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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
- B60L58/12—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries responding to state of charge [SoC]
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
- H01M10/486—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for measuring temperature
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
- H01M2010/4271—Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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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
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Abstract
The present invention provides a kind of charge control methods of lead-acid accumulator in hybrid vehicle,Temperature sensor is set on lead-acid accumulator,When light current on vehicle,Battery management system reads and stores the first terminal voltage U and temperature T of lead-acid accumulator,It is 100% by the state-of-charge of lead-acid accumulator under the first terminal voltage U of lead-acid accumulator and temperature T,70%,Voltage value U1 corresponding to 40% and 10%,U2,U3 and U4 compare and is charged as required until driver presses lower eletric button,It is 0 that vehicle, which disconnects all high pressures in addition to battery management system and DC/DC and the output voltage of DC/DC is arranged, at this time,Battery management system reads and stores the second terminal voltage U ＇ of lead-acid accumulator,It is 100% by the state-of-charge of lead-acid accumulator under the second terminal voltage U ＇ of lead-acid accumulator and temperature T,70%,Voltage value U1 corresponding to 40% and 10%,U2,U3 and U4 compare and is charged as required until vehicle power-off.The present invention can effective increasing storage battery service life.
Description
Technical field
The present invention relates to a kind of charge control method, more particularly to the charging of lead-acid accumulator in a kind of hybrid vehicle
Control method.
Background technology
Environmental protection consciousness is goed deep into the development and people of auto industry, new-energy automobile will become market
Mainstream.New-energy automobile increases the hardware such as entire car controller and DC/DC compared to traditional vehicle, this is to low pressure auxiliary power supply system
Management of charging and discharging provide certain condition.
And in hybrid vehicle low pressure auxiliary power supply system, engine is connected by epicyclic gearbox and permanent magnet generator
It connects, can be by its power generation, therefore eliminate the small generators being connected with engine in orthodox car；DC to DC in system
The input energy of inverter DC/DC can alone or in combination be provided by permanent magnet generator and power battery pack, i.e. its input voltage
It is exactly high voltage dc bus voltage.The output of DC/DC supplies electricity to interior low-voltage load and accumulator.When vehicle forceful electric power, when low
Can be that vehicle low voltage equipment is powered jointly with DC/DC, accumulator is at this time when pressure electrical equipment has significant power demand
Discharge condition；When the not enough power supply of accumulators store, also filled to accumulator while DC/DC powers to low voltage equipment
Electricity, at this time accumulator be in charged state.When vehicle is in light current state, the electrical equipment quantity that vehicle can work is limited
It makes and whole energy is provided by accumulator, accumulator is in discharge condition.In hybrid vehicle low pressure auxiliary power supply system,
The variation that DC/DC can be controlled its output voltage by battery management system BMS works as vehicle since DC/DC and accumulator are connected directly
The voltage of accumulator changes with the variation of DC/DC output voltages when upper forceful electric power, voltage sensor included DC/DC after upper forceful electric power
Voltage can not actual response accumulator state, the voltage for generally acquiring vehicle under light current state is as basis for estimation.
Since lead accumulator has many advantages, such as that cheap, easy to use, dependable performance, most automobiles all use it
As light current power supply.But it is limited by traditional vehicle hardware, few people study the management of charging and discharging to automobile lead-acid battery.It is existing
In technology, the charging modes of lead-acid accumulator have the following disadvantages：1) charging of constant pressure is all used in most of traditional vehicles substantially
Strategy, charging voltage are generally located on 14 between 14.5V, and when accumulator feeding, initial stage charging current can be very big, to electric power storage
There is detrimental effect in pond, and it is subject to certain restrictions on charge rate and efficiency；2) voltage compensation strategy is not used to temperature,
It is all charged with same voltage when temperature is very high and very low, can cause to overcharge or the case where undercharge；3) seldom right under light current
Accumulator electric-quantity is monitored and prompts, and unconscious its electricity may be given out light, causes can not start automobile next time, while right
The damage of accumulator is very big；4) it still provides higher voltage when accumulator is full to charge, may result in and overcharge.
With being widely popularized for hybrid vehicle, the lead-acid accumulator in hybrid vehicle low pressure auxiliary power supply system
Charge control method become one of the important topic in hybrid vehicle evolution.
Invention content
The present invention is intended to provide a kind of effective protection lead-acid accumulator and high efficiency charging, effectively extend accumulator use the longevity
The charge control method of lead-acid accumulator in the hybrid vehicle of life.
The present invention is realized by following scheme：
The charge control method of lead-acid accumulator, is arranged temperature sensing on lead-acid accumulator in a kind of hybrid vehicle
Device, when light current on vehicle, battery management system reads and stores the first terminal voltage U and temperature T of lead-acid accumulator, by plumbic acid
The state-of-charge of lead-acid accumulator is corresponding to 100%, 70%, 40% and 10% under the first terminal voltage U and temperature T of accumulator
Voltage value U1, U2, U3 and U4 compared：
As U ＞ U1, if vehicle is forceful electric power state, the constant-potential charge that lead-acid accumulator is exported with DC/DC is described
The constant voltage of DC/DC outputs is float charge voltage U of the lead-acid accumulator at temperature TIt is floating；If vehicle in forceful electric power state, does not weigh
Whether multiple U meets the judgement flow of U ＞ U1；
As U≤U1, lead-acid accumulator is charged with stage charging strategy one if vehicle is forceful electric power state；If vehicle is not
In forceful electric power state, " built without operation indicating if U3≤U ＜ U2 are shown on onboard instruments on onboard instruments if U2≤U≤U1
Forceful electric power in view " shows " please go up forceful electric power ", if U≤U4 is shown on onboard instruments if U4 ＜ U ＜ U3 on onboard instruments
" feed, please safeguard battery " and then vehicle power-off；It is no operation indicating on onboard instruments, display " it is recommended that upper forceful electric power "
Or display " forceful electric power please be go up " in the case of, if in driver's executions forceful electric power operate if lead-acid accumulator with stage charging strategy one into
Row charging repeats the judgement flow whether U meets U2≤U≤U1 if driver does not execute forceful electric power operation；
Lead-acid accumulator is charged with the DC/DC constant-potential charges exported or lead-acid accumulator with stage charging strategy one
Afterwards, if driver presses lower eletric button, vehicle disconnects all high pressures in addition to battery management system and DC/DC and DC/ is arranged
The output voltage of DC is 0, and battery management system reads and stores the second terminal voltage U ＇ of lead-acid accumulator, by lead-acid accumulator
The state-of-charge of lead-acid accumulator is the voltage corresponding to 100%, 70%, 40% and 10% under second terminal voltage U ＇ and temperature T
Value U1, U2, U3 and U4 compare and are charged as required until vehicle power-off；If driver does not press lower eletric button,
Repeat the judgement flow whether U meets U ＞ U1.
Further, the state-of-charge of the second terminal voltage U ＇ and lead-acid accumulator under temperature T of the lead-acid accumulator are
100%, voltage value U1, U2, U3 and U4 corresponding to 70%, 40% and 10% compare and are charged as required until vehicle is complete
Electric step includes under complete：
As U ＇ >=U2, vehicle power-off；
As U3≤U ＇ ＜ U2, if the state-of-charge of power battery pack is more than 50%, lead-acid accumulator is filled with stage
Vehicle power-off after two charging 20min or more of electric strategy, this step charging time general control is in 20~25min；Otherwise directly
Vehicle power-off；
As U4 ＜ U ＇ ＜ U3, if the state-of-charge of power battery pack is more than 70%, lead-acid accumulator is filled with stage
Vehicle power-off after two charging 40min or more of electric strategy, this step charging time general control is in 40~45min；If power electric
The state-of-charge of Chi Bao is no more than 70% and the state-of-charge of power battery pack is more than 50%, then lead-acid accumulator is filled with stage
Vehicle power-off after two charging 20min or more of electric strategy, this step charging time general control is in 20~25min；Otherwise directly
Vehicle power-off；
As U ＇≤U4, display " feed, please safeguard battery " and then vehicle power-off on onboard instruments.
Under normal circumstances, in order to there is the reaction of enough time to driver, " feed, please safeguard for display on onboard instruments
Battery " arrived the time control of vehicle power-off at 5~10 seconds.
The stage charging strategy one is：It is stored by the first terminal voltage U of lead-acid accumulator plus 1V and no more than plumbic acid
Float charge voltage U of the battery at temperature TIt is floatingIncrease as the output voltage of DC/DC, and with the amplitude of 0.125V per minute, finally
The constant float charge voltage U in lead-acid accumulator at temperature TIt is floating。
The stage charging strategy two is：It is stored by the second terminal voltage U ＇ of lead-acid accumulator plus 1V and no more than plumbic acid
Float charge voltage U of the battery at temperature TIt is floatingIncrease as the output voltage of DC/DC, and with the amplitude of 0.125V per minute, finally
The constant float charge voltage U in lead-acid accumulator at temperature TIt is floating。
The state-of-charge of lead-acid accumulator is the voltage value corresponding to 100%, 70%, 40% and 10% under the temperature T
The float charge voltage U of U1, U2, U3 and U4 and lead-acid accumulator at temperature TIt is floatingPass through 1 acquisition of tabling look-up.
Table 1
The setting of temperature range in table 1 can suitably be adjusted according to actual conditions.
The concrete numerical value that U11~U18, U21~U28, U31~U38, U41~U48 in table 1 are represented, preparation method have
It is a variety of, be using more method：The normal lead-acid accumulator of several voltage internal resistances is respectively taken to be respectively placed in various in table 1
In the environment of temperature range, several lead-acid accumulators divide equally after respectively give lead acid battery charge so that lead-acid accumulator
Carried charge is respectively 100%, 70%, 40%, 10%, after shelving 30min~60min, measures lead acid storage battery in each grouping respectively
The terminal voltage in pond, it is contemplated that test error and battery abnormal conditions take at each temperature when test under each carried charge situation
Sample amount is 5~10, and when temperature range is bigger, needs to obtain data when by the temperature value of near limit；It takes respectively
The state-of-charge of lead-acid accumulator is that 100%, 70%, 40% and 10% average value under different temperatures range is used as in the temperature
Spend range under lead-acid accumulator state-of-charge be 100%, 70%, 40% and 10% corresponding to voltage value U1, U2, U3 and
U4。
U in table 1Floating 1~UFloating 8The concrete numerical value of representative, preparation method are：Respectively take several fully charged and electric first
The pressure normal lead-acid accumulator of internal resistance is respectively placed in the environment of the various temperature ranges in table 1, after shelving 1~4h, respectively
The self-discharge current of sounding lead acid accumulator simultaneously respectively takes its average value；Respectively take several fully charged and voltage internal resistances normal later
Lead-acid accumulator be respectively placed in the environment of the various temperature ranges in table 1, after shelving 1~4h, respectively give lead-acid accumulator
Apply smaller voltage to charge, applies voltage and increased with slow speed and measure charging current simultaneously until charging current
Reach corresponding self-discharge current average value under each temperature range, application voltage at this time is the floating charging of lead-acid accumulator
Pressure.Generally, it is contemplated arriving test error and battery abnormal conditions, sampling amount is generally 5~10.
The charge control method of lead-acid accumulator, has the following advantages in the hybrid vehicle of the present invention：
1, power shortage guarantor can be provided by its electricity of the temperature and voltage real-time monitoring of lead-acid accumulator under light current state
Protection mechanism.
2, when detecting electric quantity of lead-acid storage battery abundance, the constant-potential charge of DC/DC outputs, and DC/DC outputs
Constant voltage is float charge voltage U of the lead-acid accumulator at temperature TIt is floating, so design is in order to avoid accumulator overvoltage fluctuates
Make vehicle powered stable and can prevent from overcharging；And lead-acid accumulator is charged with stage charging strategy, can improve charge efficiency
And rate, and the charging of high current will not be caused, it can be good at the service life for extending lead-acid accumulator.
3, after driver presses lower eletric button, battery management system BMS can be according to the state-of-charge SOC of power battery pack
Judge whether lead-acid accumulator is continued charging a period of time with stage charging strategy with the voltage of lead-acid accumulator, it is this to set
Meter can make lead-acid accumulator be not at feed condition as possible, and feed has a significant impact to the service life of lead-acid accumulator, for example, such as
Under fruit after electricity, if this vehicle is not opened for some time, the reduction that the electricity of lead-acid accumulator will be slowly causes seriously to feed,
It is big to aging effects.
4, the method for the present invention monitors the state of accumulator under light current, has formulated the power shortage protection mechanism under different conditions,
And stage charging strategy is used after forceful electric power on vehicle.Show that the method for the present invention can effectively improve storage by real train test
The charge efficiency of battery shortens the charging time, prevents accumulator super-charge and charging current excessive, extends storage to a certain extent
The service life of battery, this realizes that more reasonably Charge Management has important practicality to the lead-acid accumulator of hybrid vehicle
Value.
Description of the drawings
Fig. 1：The charge control flow chart of lead-acid accumulator in hybrid vehicle
Specific implementation mode
The invention will be further described with reference to embodiments, but the invention is not limited in the statements of embodiment.
Embodiment 1
The charge control method of lead-acid accumulator in a kind of hybrid vehicle, control flow chart is as shown in Figure 1, in lead
Temperature sensor is set on acid accumulator, and when light current on vehicle, battery management system reads and store the of lead-acid accumulator
One terminal voltage U and temperature T, the state-of-charge by the first terminal voltage U and lead-acid accumulator under temperature T of lead-acid accumulator are
100%, voltage value U1, U2, U3 and U4 corresponding to 70%, 40% and 10% are compared：
As U ＞ U1, if vehicle is forceful electric power state, the constant-potential charge that lead-acid accumulator is exported with DC/DC is described
The constant voltage of DC/DC outputs is float charge voltage U of the lead-acid accumulator at temperature TIt is floating；If vehicle in forceful electric power state, does not weigh
Whether multiple U meets the judgement flow of U ＞ U1；
As U≤U1, lead-acid accumulator is charged with stage charging strategy one if vehicle is forceful electric power state；If vehicle is not
In forceful electric power state, " built without operation indicating if U3≤U ＜ U2 are shown on onboard instruments on onboard instruments if U2≤U≤U1
Forceful electric power in view " shows " please go up forceful electric power " if U4 ＜ U ＜ U3 on onboard instruments, if display " feedback on U≤U4 onboard instruments
Electricity please safeguard battery " and 5s after vehicle power-off；Be no operation indicating on onboard instruments, display " it is recommended that upper forceful electric power " or
It shows in the case of " forceful electric power please be go up ", lead-acid accumulator is carried out with stage charging strategy one if forceful electric power operation in driver's execution
Charging repeats the judgement flow whether U meets U2≤U≤U1 if driver does not execute forceful electric power operation；
Lead-acid accumulator is charged with the DC/DC constant-potential charges exported or lead-acid accumulator with stage charging strategy one
Afterwards, if driver presses lower eletric button, vehicle disconnects all high pressures in addition to battery management system and DC/DC and DC/ is arranged
The output voltage of DC is 0, and battery management system reads and stores the second terminal voltage U ＇ of lead-acid accumulator, by lead-acid accumulator
The state-of-charge of lead-acid accumulator is the voltage corresponding to 100%, 70%, 40% and 10% under second terminal voltage U ＇ and temperature T
Value U1, U2, U3 and U4 are compared：
As U ＇ >=U2, vehicle power-off；
As U3≤U ＇ ＜ U2, if the state-of-charge of power battery pack is more than 50%, lead-acid accumulator is filled with stage
Vehicle power-off after two charging 20min of electric strategy；Otherwise direct vehicle power-off；
As U4 ＜ U ＇ ＜ U3, if the state-of-charge of power battery pack is more than 70%, lead-acid accumulator is filled with stage
Vehicle power-off after two charging 40min of electric strategy；If the state-of-charge of power battery pack is not more than 70% and power battery pack
State-of-charge be more than 50%, then lead-acid accumulator with stage charging strategy two charge 20min after vehicle power-off；Otherwise
Direct vehicle power-off；
As U ＇≤U4, vehicle power-off after " feed, please safeguard battery " and 5s is shown on onboard instruments.
If driver does not press lower eletric button, repeatedly whether U meets the judgement flow of U ＞ U1.
Stage charging strategy one is：First terminal voltage U of lead-acid accumulator plus 1V and is not more than lead-acid accumulator
Float charge voltage U at temperature TIt is floatingIncrease as the output voltage of DC/DC, and with the amplitude of 0.125V per minute, it is final constant
In float charge voltage U of the lead-acid accumulator at temperature TIt is floating。
Stage charging strategy two is：Second terminal voltage U ＇ of lead-acid accumulator plus 1V and are not more than lead-acid accumulator
Float charge voltage U at temperature TIt is floatingIncrease as the output voltage of DC/DC, and with the amplitude of 0.125V per minute, it is final constant
In float charge voltage U of the lead-acid accumulator at temperature TIt is floating。
Under temperature T the state-of-charge of lead-acid accumulator be 100%, 70%, 40% and 10% corresponding to voltage value U1,
The float charge voltage U of U2, U3 and U4 and lead-acid accumulator at temperature TIt is floatingPass through 1 acquisition of tabling look-up.
Table 1
The concrete numerical value that U11~U18, U21~U28, U31~U38, U41~U48 in table 1 are represented, preparation method
For：The normal lead-acid accumulator of 32 voltage internal resistances is respectively taken to be respectively placed in the environment of the various temperature ranges in table 1,32
Lead-acid accumulator is divided into four groups, and every group of 8 lead-acid accumulators give each group lead acid battery charge, one group of lead acid storage battery respectively
The carried charge in pond is 100%, and the carried charge of one group of lead-acid accumulator is 70%, and the carried charge of one group of lead-acid accumulator is 40%,
The carried charge of one group of lead-acid accumulator is 10%, after shelving 30min~60min, measures the end of each grouping lead-acid accumulator respectively
Voltage, and it is 100%, 70%, 40% to be averaged respectively as the state-of-charge of lead-acid accumulator in this temperature range
With voltage value U1, U2, U3 and U4 corresponding to 10%.
U in table 1Floating 1~UFloating 8The concrete numerical value of representative, preparation method are：Respectively take that 8 fully charged first and in voltage
The normal lead-acid accumulator of resistance is respectively placed in the environment of the various temperature ranges in table 1, after shelving 1~4h, difference sounding lead
The self-discharge current of acid accumulator simultaneously respectively takes its average value；8 fully charged and normal plumbic acids of voltage internal resistance are respectively taken later
Accumulator is respectively placed in the environment of the various temperature ranges in table 1, after shelving 1~4h, respectively to lead-acid accumulator apply compared with
Small voltage charges, and applies voltage and is increased with slow speed and measure charging current simultaneously until charging current reaches each
Corresponding self-discharge current average value under temperature range, application voltage at this time are the float charge voltage of lead-acid accumulator.
Claims (4)
1. the charge control method of lead-acid accumulator in a kind of hybrid vehicle, it is characterised in that：It is set on lead-acid accumulator
Temperature sensor is set, when light current on vehicle, battery management system reads and stores the first terminal voltage U and temperature of lead-acid accumulator
Spend T, by the state-of-charge of lead-acid accumulator under the first terminal voltage U of lead-acid accumulator and temperature T be 100%, 70%, 40% and
Voltage value U1, U2, U3 and U4 corresponding to 10% are compared：
As U ＞ U1, if vehicle is forceful electric power state, the constant-potential charge that lead-acid accumulator is exported with DC/DC, the DC/
The constant voltage of DC outputs is float charge voltage U of the lead-acid accumulator at temperature TIt is floating；If vehicle is not in forceful electric power state, repeatedly U
Whether the judgement flow of U ＞ U1 is met；
As U≤U1, lead-acid accumulator is charged with stage charging strategy one if vehicle is forceful electric power state；If vehicle is not strong
Electricity condition, without operation indicating on onboard instruments if U2≤U≤U1, if U3≤U ＜ U2 are shown on onboard instruments " on it is recommended that
Forceful electric power ", if U4 ＜ U ＜ U3 on onboard instruments show " forceful electric power please be go up ", if U≤U4 show on onboard instruments " feed,
Please safeguard battery " and then vehicle power-off；It is no operation indicating on onboard instruments, display " it is recommended that upper forceful electric power " or display
In the case of " please go up forceful electric power ", lead-acid accumulator is filled with stage charging strategy one if forceful electric power operation in driver's execution
Electricity repeats the judgement flow whether U meets U2≤U≤U1 if driver does not execute forceful electric power operation；
After lead-acid accumulator is charged with the DC/DC constant-potential charges exported or lead-acid accumulator with stage charging strategy one,
If driver presses lower eletric button, vehicle disconnects all high pressures in addition to battery management system and DC/DC and is arranged DC/DC's
Output voltage is 0, and battery management system reads and stores the second terminal voltage U ＇ of lead-acid accumulator, by the second of lead-acid accumulator
Under terminal voltage U ＇ and temperature T the state-of-charge of lead-acid accumulator be voltage value U1 corresponding to 100%, 70%, 40% and 10%,
U2, U3 and U4 compare and are charged as required until vehicle power-off；If driver does not press lower eletric button, repeatedly U
Whether the judgement flow of U ＞ U1 is met.
2. the charge control method of lead-acid accumulator in hybrid vehicle as described in claim 1, it is characterised in that：It is described
The state-of-charge of lead-acid accumulator is 100%, 70%, 40% and 10% under the second terminal voltage U ＇ and temperature T of lead-acid accumulator
Corresponding voltage value U1, U2, U3 and U4 is compared and is charged as required until vehicle power-off step includes：
As U ＇ >=U2, vehicle power-off；
As U3≤U ＇ ＜ U2, if the state-of-charge of power battery pack is more than 50%, lead-acid accumulator is with stage charging plan
Vehicle power-off after slightly two charging 20min or more；Otherwise direct vehicle power-off；
As U4 ＜ U ＇ ＜ U3, if the state-of-charge of power battery pack is more than 70%, lead-acid accumulator is with stage charging plan
Vehicle power-off after slightly two charging 40min or more；If the state-of-charge of power battery pack is not more than 70% and power battery pack
State-of-charge be more than 50%, then lead-acid accumulator is charged vehicle power-off after 20min or more with stage charging strategy two；
Otherwise direct vehicle power-off；
As U ＇≤U4, display " feed, please safeguard battery " and then vehicle power-off on onboard instruments.
3. the charge control method of lead-acid accumulator in hybrid vehicle as claimed in claim 1 or 2, it is characterised in that：
The stage charging strategy one is：By the first terminal voltage U of lead-acid accumulator plus 1V and no more than lead-acid accumulator in temperature
Spend the float charge voltage U under TIt is floatingIncrease as the output voltage of DC/DC, and with the amplitude of 0.125V per minute, it is final constant in lead
Float charge voltage U of the acid accumulator at temperature TIt is floating。
4. the charge control method of lead-acid accumulator in hybrid vehicle as claimed in claim 2, it is characterised in that：It is described
Stage charging strategy two is：By the second terminal voltage U ＇ of lead-acid accumulator plus 1V and no more than lead-acid accumulator in temperature T
Under float charge voltage UIt is floatingIncrease as the output voltage of DC/DC, and with the amplitude of 0.125V per minute, it is final constant in plumbic acid storage
Float charge voltage U of the battery at temperature TIt is floating。
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| CN102422503A (en) * | 2009-04-03 | 2012-04-18 | 马维尔国际贸易有限公司 | Power management circuit for rechargeable battery stack |
| JP2012093869A (en) * | 2010-10-26 | 2012-05-17 | Shinichi Akita | Method for operating solar battery at maximum power point, and charging device |
| CN105846528A (en) * | 2015-10-10 | 2016-08-10 | 陶杰 | Control method of electric automobile intelligent charging pile system |
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| CN102422503A (en) * | 2009-04-03 | 2012-04-18 | 马维尔国际贸易有限公司 | Power management circuit for rechargeable battery stack |
| JP2012093869A (en) * | 2010-10-26 | 2012-05-17 | Shinichi Akita | Method for operating solar battery at maximum power point, and charging device |
| CN105846528A (en) * | 2015-10-10 | 2016-08-10 | 陶杰 | Control method of electric automobile intelligent charging pile system |
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