CN106356575A - Charging control method of lead-acid storage battery in hybrid electric vehicle - Google Patents
Charging control method of lead-acid storage battery in hybrid electric vehicle Download PDFInfo
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- CN106356575A CN106356575A CN201610885667.3A CN201610885667A CN106356575A CN 106356575 A CN106356575 A CN 106356575A CN 201610885667 A CN201610885667 A CN 201610885667A CN 106356575 A CN106356575 A CN 106356575A
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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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- Power Engineering (AREA)
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention provides a charging control method of a lead-acid storage battery in a hybrid electric vehicle. The charging control method is characterized by arranging a temperature sensor on the lead-acid storage battery, reading and storing first end voltage U and temperature T of the lead-acid storage battery by a battery management system when the whole vehicle is in weak current, comparing the first end voltage U of the lead-acid storage battery with voltage values U1, U2, U3 and U4 corresponding to the charged status of 100 percent, 70 percent, 40 percent and 10 percent of the lead-acid storage battery under the temperature T, charging as required until a driver presses a power supplying button, switching off all high voltages except the battery management system and DC(Direct Current)/DC of the whole vehicle at the moment, and setting the output voltage of the DC/DC to be 0; reading and storing second end voltage U' of the lead-acid storage battery by the battery management system, comparing the second end voltage U' of the lead-acid storage battery with the voltage values U1, U2, U3 and U4 corresponding to the charged status of 100 percent, 70 percent, 40 percent and 10 percent of the lead-acid storage battery under the temperature T, and charging as required until the whole vehicle is completely powered. According to the charging control method provided by the invention, the service life of the storage battery can be effectively prolonged.
Description
Technical field
The present invention relates to a kind of charge control method, particularly to a kind of charging of lead-acid accumulator in hybrid vehicle
Control method.
Background technology
Development and people with auto industry are goed deep into environmental protection consciousness, and new-energy automobile will become market
Main flow.New-energy automobile is compared traditional vehicle and be increased the hardware such as entire car controller and dc/dc, and 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, electromotor passes through epicyclic gearbox with magneto even
Connect, the small generators being connected with electromotor can therefore be eliminated by its generating in orthodox car；DC-DC in system
The input energy of inverter dc/dc can be provided alone or in combination by magneto and electrokinetic cell bag, i.e. its input voltage
It is exactly high voltage dc bus voltage.The output of dc/dc supplies electricity to in-car low-voltage load and accumulator.During car load forceful electric power, when low
When pressure electrical equipment has significant power demand, it can be powered for car load low voltage equipment jointly with dc/dc, and now accumulator is in
Discharge condition；When the not enough power supply of accumulators store, also fill to accumulator while dc/dc powers to low voltage equipment
Electricity, now accumulator be in charged state.When car load is in light current state, the electrical equipment quantity that car load can work is limited
System and all energy are provided by accumulator, and accumulator is in discharge condition.In hybrid vehicle low pressure auxiliary power supply system,
Dc/dc can be controlled the change of its output voltage by battery management system bms, because dc/dc is joined directly together with accumulator, works as car load
During upper forceful electric power, the voltage of accumulator changes, the voltage sensor that after upper forceful electric power, dc/dc carries with the change of dc/dc output voltage
Voltage cannot actual response accumulator state, the voltage typically gathering car load under light current state is as basis for estimation.
Because lead battery has the advantages that low price, easy to use, dependable performance, most automobiles all adopt it
As light current power supply.But limited by traditional vehicle hardware, the management of charging and discharging to automobile lead-acid battery for few people's research.Existing
In technology, the charging modes of lead-acid accumulator have the disadvantage in that 1) substantially all adopt the charging of constant voltage in most of traditional vehicle
Strategy, charging voltage is generally located between 14 to 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 adopted to temperature,
Temperature all uses same voltage to charge when very high and very low, can lead to overcharge or undercharge situation；3) seldom right under light current
Accumulator electric-quantity is monitored and points out, and unconscious its electricity may be given out light, leads to start automobile next time, simultaneously right
The infringement of accumulator is very big；4) still provide higher voltage to be charged when accumulator is full, may result in and overcharge.
Being widely popularized with hybrid vehicle, the lead-acid accumulator in hybrid vehicle low pressure auxiliary power supply system
Charge control method become one of one of hybrid vehicle evolution important topic.
Content of the invention
The present invention is intended to provide a kind of effective protection lead-acid accumulator and high efficiency charge, effectively extend accumulator and use the longevity
The charge control method of lead-acid accumulator in the hybrid vehicle of life.
The present invention is realized by below scheme:
The charge control method of lead-acid accumulator in a kind of hybrid vehicle, arranges temperature sensing on lead-acid accumulator
Device, when light current on car load, battery management system reads and stores the first terminal voltage u and temperature t of lead-acid accumulator, by plumbic acid
First terminal voltage u of accumulator is corresponding to 100%, 70%, 40% and 10% with the state-of-charge of lead-acid accumulator at temperature t
Magnitude of voltage u1, u2, u3 and u4 contrasted:
As u ＞ u1, if car load is forceful electric power state, the constant-potential charge that lead-acid accumulator is exported with dc/dc, described
The constant voltage of dc/dc output is the float charge voltage u of lead-acid accumulator at temperature tFloating；If car load, not in forceful electric power state, repeats u
Whether meet the judgement flow process of u ＞ u1；
As u≤u1, if car load is forceful electric power state, lead-acid accumulator is charged with stage charging strategy one；If car load is not
In forceful electric power state, if u2≤u≤u1, no operation indicating on onboard instruments, if u3≤u is ＜ u2, onboard instruments shows and " builds
Forceful electric power in view ", if u4 is ＜ u ＜ u3, shows " please go up forceful electric power " on onboard instruments, if u≤u4, shows on onboard instruments
" feed, battery please be safeguard " subsequent car load power-off；Onboard instruments are no operation indicating, display " forceful electric power in suggestion "
Or in the case of display " please go up forceful electric power ", if forceful electric power operation in driver's execution, lead-acid accumulator is entered with stage charging strategy one
Row charges, if driver does not execute forceful electric power operation, repeats the judgement flow process whether u meets u2≤u≤u1；
The constant-potential charge that lead-acid accumulator is exported with dc/dc or lead-acid accumulator are charged with stage charging strategy one
Afterwards, if driver presses lower eletric button, car load disconnects all high pressure in addition to battery management system and dc/dc and arranges dc/
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
At second terminal voltage u ＇ and temperature t the state-of-charge of lead-acid accumulator be 100%, the voltage corresponding to 70%, 40% and 10%
Value u1, u2, u3 and u4 carry out contrast and charge on request up to car load power-off；If driver does not press lower eletric button,
Repeat the judgement flow process whether u meets u ＞ u1.
Further, the second terminal voltage u ＇ of described lead-acid accumulator and the state-of-charge of lead-acid accumulator at temperature t are
100%th, magnitude of voltage u1, u2, u3 and the u4 corresponding to 70%, 40% and 10% carries out contrast and charges on request until car load is complete
Lower electricity step includes entirely:
As u ＇ >=u2, car load power-off；
As u3≤u ＇ ＜ u2, if the state-of-charge of electrokinetic cell bag is more than 50%, lead-acid accumulator is filled with stage
Car load power-off after tactful more than the two charging 20min of electricity, this step charging interval general control is in 20～25min；Otherwise direct
Car load power-off；
As u4 ＜ u ＇ ＜ u3, if the state-of-charge of electrokinetic cell bag is more than 70%, lead-acid accumulator is filled with stage
Car load power-off after tactful more than the two charging 40min of electricity, this step charging interval general control is in 40～45min；If power current
The state-of-charge of the state-of-charge of Chi Bao no more than 70% and electrokinetic cell bag is more than 50%, then lead-acid accumulator is filled with stage
Car load power-off after tactful more than the two charging 20min of electricity, this step charging interval general control is in 20～25min；Otherwise direct
Car load power-off；
As u ＇≤u4, display " feed, battery please be safeguard " subsequent car load power-off on onboard instruments.
Generally, in order to there be the reaction of enough time to driver, on onboard instruments, " feed, please safeguard for display
Battery " arrived the time control of car load power-off at 5～10 seconds.
Described stage charging strategy one is: the first terminal voltage u of lead-acid accumulator is added 1v and no more than at temperature t
The float charge voltage u of lead-acid accumulatorFloatingAs the output voltage of dc/dc, and increased with the amplitude of 0.125v per minute, finally constant
The float charge voltage u of lead-acid accumulator at temperature tFloating.
Described stage charging strategy two is: the second terminal voltage u ＇ of lead-acid accumulator is added 1v and no more than temperature t
The float charge voltage u of lower lead-acid accumulatorFloatingAs the output voltage of dc/dc, and increased with the amplitude of 0.125v per minute, finally permanent
It is scheduled on the float charge voltage u of lead-acid accumulator at temperature tFloating.
At described temperature t the state-of-charge of lead-acid accumulator be 100%, the magnitude of voltage corresponding to 70%, 40% and 10%
The float charge voltage u of lead-acid accumulator under u1, u2, u3 and u4 and temperature tFloatingBy 1 acquisition of tabling look-up.
Table 1
The setting of the temperature range in table 1, suitably can adjust according to practical situation.
The concrete numerical value that u11～u18 in table 1, u21～u28, u31～u38, u41～u48 represent, its preparation method has
Multiple, using more method be: respectively take all normal lead-acid accumulator of several voltage internal resistances to be respectively placed in various in table 1
In the environment of temperature range, several lead-acid accumulators divide equally after respectively to 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 packet respectively
The terminal voltage in pond it is contemplated that test error and battery abnormal conditions, during test under each carried charge situation at a temperature of each, takes
Sample amount be 5～10, and temperature range than larger when, need near the limit temperature value when obtain data；Take respectively
The state-of-charge of lead-acid accumulator is 100%, 70%, 40% and 10% meansigma methodss under different temperatures scope are as in this temperature
The state-of-charge of the lead-acid accumulator under degree scope is 100%, magnitude of voltage u1, u2, u3 corresponding to 70%, 40% and 10% and
u4.
U in table 1Floating 1～uFloating 8The concrete numerical value representing, its preparation method is: respectively takes several fully charged and electric first
In the environment of all normal lead-acid accumulator of pressure internal resistance is respectively placed in 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 meansigma methods；Respectively take that several are fully charged and voltage internal resistance is all normal afterwards
Lead-acid accumulator be respectively placed in the various temperature ranges in table 1 in the environment of, after shelving 1～4h, respectively give lead-acid accumulator
Apply less voltage to be charged, applied voltage is increased with slow speed and measures charging current up to charging current simultaneously
Reach corresponding self-discharge current meansigma methodss under each temperature range, the floating charging of applied voltage as lead-acid accumulator now
Pressure.Generally, it is contemplated arriving test error and battery abnormal conditions, sampling amount generally 5～10.
In the hybrid vehicle of the present invention, the charge control method of lead-acid accumulator, has the advantage that
1st, temperature and its electricity of voltage real-time monitoring of lead-acid accumulator can be passed through under light current state, provide power shortage to protect
Protection mechanism.
2nd, when electric quantity of lead-acid storage battery is detected and being sufficient, the constant-potential charge of dc/dc output, and dc/dc output
Constant voltage is the float charge voltage u of lead-acid accumulator at temperature tFloating, it is so designed that to be in order to avoid the fluctuation of accumulator overvoltage makes
Car load is powered stable and can be prevented from overcharging；And lead-acid accumulator is charged with stage charging strategy, it is possible to increase charge efficiency and
Speed, and it is not result in the charging of high current, can be good at extending the service life of lead-acid accumulator.
3rd, after driver presses lower eletric button, battery management system bms can be according to the state-of-charge soc of electrokinetic cell bag
To judge that whether lead-acid accumulator is continued a period of time of charging with stage charging strategy with the voltage of lead-acid accumulator, this to set
Meter can make lead-acid accumulator be not at feed condition as far as possible, and feed has a significant impact to the life-span of lead-acid accumulator, such as, such as
After the lower electricity of fruit, if this car is not opened for some time, the electricity of lead-acid accumulator will minimizing slowly, lead to seriously feed,
Big to aging effects.
4th, the inventive method monitors the state of accumulator under light current, has formulated the power shortage protection mechanism under different conditions,
And adopt stage charging strategy after forceful electric power on car load.Shown by real train test, the inventive method can effectively improve storage
The charge efficiency of battery, shorten the charging interval, prevent accumulator super-charge and charging current excessive, extending storage to a certain extent
The service life of battery, this realizes more reasonably Charge Management to the lead-acid accumulator of hybrid vehicle and has important practicality
It is worth.
Brief description
Fig. 1: the charge control flow chart of lead-acid accumulator in hybrid vehicle
Specific embodiment
The invention will be further described with reference to embodiments, but the invention is not limited in the statement of embodiment.
Embodiment 1
The charge control method of lead-acid accumulator in a kind of hybrid vehicle, its control flow chart is as shown in figure 1, in lead
On acid accumulator, temperature sensor is set, when light current on car load, battery management system reads and stores the of lead-acid accumulator
One terminal voltage u and temperature t, the first terminal voltage u of lead-acid accumulator and the state-of-charge of lead-acid accumulator at temperature t are
100%th, magnitude of voltage u1, u2, u3 and u4 corresponding to 70%, 40% and 10% are contrasted:
As u ＞ u1, if car load is forceful electric power state, the constant-potential charge that lead-acid accumulator is exported with dc/dc, described
The constant voltage of dc/dc output is the float charge voltage u of lead-acid accumulator at temperature tFloating；If car load, not in forceful electric power state, repeats u
Whether meet the judgement flow process of u ＞ u1；
As u≤u1, if car load is forceful electric power state, lead-acid accumulator is charged with stage charging strategy one；If car load is not
In forceful electric power state, if u2≤u≤u1, no operation indicating on onboard instruments, if u3≤u is ＜ u2, onboard instruments shows and " builds
Forceful electric power in view ", if u4 is ＜ u ＜ u3, shows " please go up forceful electric power " on onboard instruments, if u≤u4, display " feedback on onboard instruments
Electricity, please safeguard battery " and 5s after car load power-off；On onboard instruments be no operation indicating, display " forceful electric power in suggestion " or
In the case of display " please go up forceful electric power ", if forceful electric power operation in driver's execution, lead-acid accumulator is carried out with stage charging strategy one
Charge, if driver does not execute forceful electric power operation, repeat the judgement flow process whether u meets u2≤u≤u1；
The constant-potential charge that lead-acid accumulator is exported with dc/dc or lead-acid accumulator are charged with stage charging strategy one
Afterwards, if driver presses lower eletric button, car load disconnects all high pressure in addition to battery management system and dc/dc and arranges dc/
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
At second terminal voltage u ＇ and temperature t the state-of-charge of lead-acid accumulator be 100%, the voltage corresponding to 70%, 40% and 10%
Value u1, u2, u3 and u4 are contrasted:
As u ＇ >=u2, car load power-off；
As u3≤u ＇ ＜ u2, if the state-of-charge of electrokinetic cell bag is more than 50%, lead-acid accumulator is filled with stage
Car load power-off after the tactful two charging 20min of electricity；Otherwise directly car load power-off；
As u4 ＜ u ＇ ＜ u3, if the state-of-charge of electrokinetic cell bag is more than 70%, lead-acid accumulator is filled with stage
Car load power-off after the tactful two charging 40min of electricity；If the state-of-charge of electrokinetic cell bag is not more than 70% and electrokinetic cell bag
State-of-charge be more than 50%, then lead-acid accumulator is with car load power-off after stage charging strategy two charging 20min；Otherwise
Directly car load power-off；
As u ＇≤u4, onboard instruments show car load power-off after " feed, please safeguard battery " 5s.
If driver does not press lower eletric button, repeated the judgement flow process whether u meets u ＞ u1.
Stage charging strategy one is: the first terminal voltage u of lead-acid accumulator is added 1v and plumbic acid no more than at temperature t
The float charge voltage u of accumulatorFloatingAs the output voltage of dc/dc, and increased with the amplitude of 0.125v per minute, finally constant in temperature
The float charge voltage u of lead-acid accumulator under degree tFloating.
Stage charging strategy two is: the second terminal voltage u ＇ of lead-acid accumulator is added 1v and lead no more than at temperature t
The float charge voltage u of acid accumulatorFloatingAs the output voltage of dc/dc, and increased with the amplitude of 0.125v per minute, finally constant
The float charge voltage u of lead-acid accumulator at temperature tFloating.
At temperature t the state-of-charge of lead-acid accumulator be 100%, the magnitude of voltage u1 corresponding to 70%, 40% and 10%,
The float charge voltage u of lead-acid accumulator under u2, u3 and u4 and temperature tFloatingBy 1 acquisition of tabling look-up.
Table 1
The concrete numerical value that u11～u18 in table 1, u21～u28, u31～u38, u41～u48 represent, its preparation method
For: in the environment of respectively taking all normal lead-acid accumulator of 32 voltage internal resistances to be respectively placed in the various temperature ranges in table 1,32
Lead-acid accumulator is divided into four groups, every group of 8 lead-acid accumulators, gives 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 packet lead-acid accumulator respectively
Voltage, and the state-of-charge averaged respectively as lead-acid accumulator in this temperature range is 100%, 70%, 40%
With magnitude of voltage u1, u2, u3 and the u4 corresponding to 10%.
U in table 1Floating 1～uFloating 8The concrete numerical value representing, its preparation method is: respectively take that 8 fully charged first and voltage in
In the environment of all normal lead-acid accumulator of resistance is respectively placed in the various temperature ranges in table 1, after shelving 1～4h, sounding lead respectively
The self-discharge current of acid accumulator simultaneously respectively takes its meansigma methods；Respectively take 8 fully charged and all normal plumbic acids of voltage internal resistance afterwards
In the environment of accumulator is respectively placed in the various temperature ranges in table 1, after shelving 1～4h, apply relatively to lead-acid accumulator respectively
Little voltage is charged, and applied voltage is increased with slow speed and measurement charging current reaches respectively up to charging current simultaneously
Corresponding self-discharge current meansigma methodss under temperature range, the float charge voltage of applied voltage as lead-acid accumulator now.
Claims (4)
1. in a kind of hybrid vehicle lead-acid accumulator charge control method it is characterised in that: set on lead-acid accumulator
Put temperature sensor, when light current on car load, battery management system reads and store the first terminal voltage u and the temperature of lead-acid accumulator
Degree t, by the state-of-charge of lead-acid accumulator at the first terminal voltage u of lead-acid accumulator and temperature t be 100%, 70%, 40% and
Magnitude of voltage u1, u2, u3 and u4 corresponding to 10% are contrasted:
As u ＞ u1, if car load is forceful electric power state, the constant-potential charge that lead-acid accumulator is exported with dc/dc, described dc/
The constant voltage of dc output is the float charge voltage u of lead-acid accumulator at temperature tFloating；If car load is not in forceful electric power state, repeating u is
The no judgement flow process meeting u ＞ u1；
As u≤u1, if car load is forceful electric power state, lead-acid accumulator is charged with stage charging strategy one；If car load is not strong
Electricity condition, if u2≤u≤u1, no operation indicating on onboard instruments, if u3≤u is ＜ u2, on onboard instruments, display is " in suggestion
Forceful electric power ", if u4 is ＜ u ＜ u3, shows " please go up forceful electric power " on onboard instruments, if u≤u4, onboard instruments show " feed,
Please safeguard battery " and subsequent car load power-off；Onboard instruments are no operation indicating, display " forceful electric power in suggestion " or display
In the case of " please go up forceful electric power ", if forceful electric power operation in driver's execution, lead-acid accumulator is filled with stage charging strategy one
Electricity, if driver does not execute forceful electric power operation, repeats the judgement flow process whether u meets u2≤u≤u1；
After constant-potential charge that lead-acid accumulator is exported with dc/dc or lead-acid accumulator are charged with stage charging strategy one,
If driver presses lower eletric button, car load disconnects all high pressure in addition to battery management system and dc/dc and arranges 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
At terminal voltage u ＇ and temperature t the state-of-charge of lead-acid accumulator be 100%, the magnitude of voltage u1 corresponding to 70%, 40% and 10%,
U2, u3 and u4 carry out contrast and charge on request up to car load power-off；If driver does not press lower eletric button, repeat u
Whether meet the judgement flow process of u ＞ u1.
2. in hybrid vehicle as claimed in claim 1 lead-acid accumulator charge control method it is characterised in that: described
Second terminal voltage u ＇ of lead-acid accumulator is 100%, 70%, 40% and 10% with the state-of-charge of lead-acid accumulator at temperature t
Corresponding magnitude of voltage u1, u2, u3 and u4 are contrasted and are charged on request until car load power-off step includes:
As u ＇ >=u2, car load power-off；
As u3≤u ＇ ＜ u2, if the state-of-charge of electrokinetic cell bag is more than 50%, lead-acid accumulator is with stage charging plan
Car load power-off after slightly more than two charging 20min；Otherwise directly car load power-off；
As u4 ＜ u ＇ ＜ u3, if the state-of-charge of electrokinetic cell bag is more than 70%, lead-acid accumulator is with stage charging plan
Car load power-off after slightly more than two charging 40min；If the state-of-charge of electrokinetic cell bag is not more than 70% and electrokinetic cell bag
State-of-charge be more than 50%, then lead-acid accumulator is with car load power-off after stage more than charging strategy two charging 20min；
Otherwise directly car load power-off；
As u ＇≤u4, display " feed, battery please be safeguard " subsequent car load power-off on onboard instruments.
3. in hybrid vehicle as claimed in claim 1 or 2 lead-acid accumulator charge control method it is characterised in that:
Described stage charging strategy one is: the first terminal voltage u of lead-acid accumulator is added 1v and lead acid storage battery no more than at temperature t
The float charge voltage u in pondFloatingAs the output voltage of dc/dc, and increased with the amplitude of 0.125v per minute, finally constant in temperature t
The float charge voltage u of lower lead-acid accumulatorFloating.
4. in hybrid vehicle as claimed in claim 2 lead-acid accumulator charge control method it is characterised in that: described
Stage charging strategy two is: the second terminal voltage u ＇ of lead-acid accumulator is added 1v and lead-acid accumulator no more than at temperature t
Float charge voltage uFloatingAs the output voltage of dc/dc, and increased with the amplitude of 0.125v per minute, finally constant at temperature t
The float charge voltage u of lead-acid accumulatorFloating.
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| CN115378071A (en) * | 2022-08-16 | 2022-11-22 | 惠州市乐亿通科技有限公司 | Charging control method, system, device, vehicle-mounted charging module and storage medium |
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