CN110450676A - A kind of method and device controlling power battery electric current or power - Google Patents
A kind of method and device controlling power battery electric current or power Download PDFInfo
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- CN110450676A CN110450676A CN201910765529.5A CN201910765529A CN110450676A CN 110450676 A CN110450676 A CN 110450676A CN 201910765529 A CN201910765529 A CN 201910765529A CN 110450676 A CN110450676 A CN 110450676A
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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
- B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
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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
-
- 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
-
- 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
-
- 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
- H01M10/441—Methods for charging or discharging for several batteries or cells simultaneously or sequentially
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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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- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Secondary Cells (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
This application discloses the method and devices of a kind of control power battery electric current or power, comprising: obtains the current voltage of power battery；If it is determined that current voltage reaches the first predeterminated voltage, then it is gradually reduced the maximum allowable running current or maximum allowable operation power of the power battery, until fluctuation of the voltage of the power battery before reaching the second predeterminated voltage is in preset range.If power battery is in charged state, the first predeterminated voltage is not higher than blanking voltage less than the second predeterminated voltage, the second predeterminated voltage；If power battery is in discharge condition, the first predeterminated voltage is greater than the second predeterminated voltage, and the second predeterminated voltage is not less than blanking voltage.It can be seen that, by the maximum allowable running current or maximum allowable operation power that gradually decrease power battery, the voltage of power battery can be inhibited to continue to change to blanking voltage in time, the case where so as to effectively avoid the voltage due to power battery from reaching blanking voltage and lead to vehicle trouble.
Description
Technical field
This application involves power battery technology fields, more particularly to a kind of method of control power battery electric current or power
And device.
Background technique
With the development of new-energy automobile technology, the new-energy automobiles such as pure electric automobile, mixed dynamic power vehicle are increasingly becoming
The important vehicles of people's daily trip.And in new-energy automobile, the electric current of power battery (including discharge current and fill
Electric current) or power (including discharge power and charge power) will receive battery management system in the new-energy automobile
The pipe of (Battery Management System, BMS) and entire car controller (Vehicle Control Unit, VCU)
Control, i.e. BMS usually can to the vehicle dynamical system in new-energy automobile provide power battery maximum charge/discharge current or
Maximum charge/discharge power signal, and by the VCU in vehicle dynamical system according to the signal control power battery electric current or
Power is no more than the maximum current or power that the signal is characterized.
But BMS calculate power battery allow using electric current or power, and/or, VCU managing power electric
The electric current in pond perhaps power when inevitably will appear calculating or control error, this meeting is so that controlling power battery
Electric current is perhaps if what the electric current or power of power battery actually can allow to reach beyond the power battery in power process
Maximum current or power, then power battery may be intended to blanking voltage after operation a period of time, specifically, if power electric
Pond is charged state, then the voltage of power battery may be increased to blanking voltage, if power battery is discharge condition, power electric
The voltage in pond may be reduced to blanking voltage, to can make power battery when reaching blanking voltage based on corresponding voltage
Preservation tactics and occur the high tension loop in vehicle interruption, and then cause vehicle trouble, in some instances it may even be possible to will affect the row of driver
Vehicle safety.
Summary of the invention
The embodiment of the present application provides a kind of method and device for controlling power battery electric current or power, so that working as power
When the voltage of battery tends to blanking voltage, power battery voltage is inhibited to be intended to blanking voltage, to avoid due to power battery
Voltage reach blanking voltage and cause the generation of vehicle trouble, improve the safety that driver drives vehicle.
In a first aspect, the embodiment of the present application provides a kind of method for controlling power battery electric current or power, the method
Include:
Obtain the current voltage of power battery；
If it is determined that the current voltage of the power battery reaches the first predeterminated voltage, then the power battery is gradually reduced
Operating parameter, until the voltage of the power battery is in preset range reaching the fluctuation before the second predeterminated voltage, it is described
The operating parameter of power battery includes the maximum allowable running current or maximum allowable operation power of power battery；
Wherein, if the power battery is in charged state, first predeterminated voltage is less than second predeterminated voltage,
Second predeterminated voltage is not higher than blanking voltage；If the power battery is in discharge condition, first predeterminated voltage is big
In second predeterminated voltage, second predeterminated voltage is not less than the blanking voltage.
In some possible embodiments, second predeterminated voltage is the blanking voltage, described if it is determined that described
The current voltage of power battery reaches the first predeterminated voltage, then is gradually reduced the operating parameter of the power battery, until described
The voltage of power battery is in preset range reaching the fluctuation before the second predeterminated voltage, comprising:
If it is determined that the power battery is in charged state and the current voltage of the power battery increases to described first
Predeterminated voltage is then gradually reduced the operating parameter of the power battery, until the voltage of the power battery is increasing to described
Fluctuation range before blanking voltage is in the first preset range；
If it is determined that the power battery is in discharge condition and the current voltage of the power battery is reduced to described first
Predeterminated voltage is then gradually reduced the operating parameter of the power battery, until the voltage of the power battery be reduced to it is described
Fluctuation range before blanking voltage is in the second preset range.
In some possible embodiments, the operating parameter for being gradually reduced the power battery, comprising:
According to preset linear functional relation between the voltage of the power battery and the operating parameter of the power battery,
It is gradually reduced the operating parameter of the power battery.
In some possible embodiments, the operating parameter for being gradually reduced the power battery, comprising:
Determine that the multiple gradient parameters successively to successively decrease, the gradient parameter include based on the current voltage of the power battery
The maximum allowable running current of the power battery or maximum allowable operation power；
According to the multiple gradient parameters successively to successively decrease, it is gradually reduced the operating parameter of the power battery.
In some possible embodiments, the method also includes:
If it is determined that the power battery is in charged state and the current voltage of the power battery is pre- lower than described first
If voltage, alternatively, determining that the power battery is in discharge condition and the current voltage of the power battery is higher than described first
Predeterminated voltage, the then signal provided based on battery management system control the electric current or power when power battery operation.
In some possible embodiments, the method also includes:
If it is determined that the voltage of the power battery reaches second predeterminated voltage, then the electric current of the power battery is controlled
Or power is 0 or is lower than preset threshold.
Second aspect, the embodiment of the present application also provides a kind of control power battery electric current or the device of power, the dresses
It sets and includes:
Module is obtained, for obtaining the current voltage of power battery；
Reduce module, for if it is determined that the current voltage of the power battery reaches the first predeterminated voltage, being then gradually reduced
The operating parameter of the power battery, until fluctuation of the voltage of the power battery before reaching the second predeterminated voltage is in pre-
If in range, the operating parameter of the power battery include power battery maximum allowable running current or maximum allowable operation
Power；
Wherein, if the power battery is in charged state, first predeterminated voltage is less than second predeterminated voltage,
Second predeterminated voltage is not higher than blanking voltage；If the power battery is in discharge condition, first predeterminated voltage is big
In second predeterminated voltage, second predeterminated voltage is not less than the blanking voltage.
In some possible embodiments, second predeterminated voltage is the blanking voltage, the reduction module, packet
It includes:
First reduction unit, for if it is determined that the power battery is in the current electricity of charged state and the power battery
Pressure increases to first predeterminated voltage, then is gradually reduced the operating parameter of the power battery, until the power battery
Voltage is in the first preset range in the fluctuation range before increasing to the blanking voltage；
Second reduction unit, for if it is determined that the power battery is in the current electricity of discharge condition and the power battery
Pressure drop is then gradually reduced the operating parameter of the power battery down to first predeterminated voltage, until the power battery
Voltage is in the second preset range in the fluctuation range before being reduced to the blanking voltage.
In some possible embodiments, the reduction module, specifically for according to the power battery voltage with
Preset linear functional relation between the operating parameter of the power battery, is gradually reduced the operating parameter of the power battery.
In some possible embodiments, the reduction module, comprising:
Determination unit determines the multiple gradient parameters successively to successively decrease, institute for the current voltage based on the power battery
State the maximum allowable running current or maximum allowable operation power that gradient parameter includes the power battery；
Third reduction unit, for being gradually reduced the power battery according to the multiple gradient parameters successively to successively decrease
Operating parameter.
In some possible embodiments, described device further include:
First control module, for if it is determined that the power battery is in the current electricity of charged state and the power battery
It forces down in first predeterminated voltage, alternatively, determining that the power battery is in the current of discharge condition and the power battery
Voltage is higher than first predeterminated voltage, then the signal provided based on battery management system is controlled when the power battery is run
Electric current or power.
In some possible embodiments, described device further include:
Second control module, for if it is determined that the voltage of the power battery reaches second predeterminated voltage, then controlling
The electric current or power of the power battery are 0 or are lower than preset threshold.
In the above-mentioned implementation of the embodiment of the present application, the current voltage of power battery can be obtained in real time；If it is determined that
The current voltage of the power battery reaches the first predeterminated voltage, then show at this time it may be necessary to electric current to power battery or
Power is managed, and to inhibit the voltage of the power battery to continue to be intended to blanking voltage, specifically be can be and is gradually reduced this
The operating parameter of power battery, until fluctuation of the voltage of the power battery before reaching the second predeterminated voltage is in default model
It encloses namely the voltage stabilization of power battery.Wherein, the operating parameter of the power battery includes the maximum allowable fortune of power battery
Row electric current or maximum allowable operation power, if power battery is in charged state, the first predeterminated voltage is default less than second
Voltage, and the second predeterminated voltage is not higher than blanking voltage；If power battery is in discharge condition, the first predeterminated voltage is greater than
Second predeterminated voltage, also, the second predeterminated voltage is not less than blanking voltage.As it can be seen that in electric current or power to power battery
During being managed, when the voltage of power battery tends to blanking voltage, the maximum by gradually decreasing power battery permits
Perhaps perhaps maximum allowable operation power may be implemented to gradually decrease the running current of power battery or operation function running current
Rate effectively avoids the electricity due to power battery so as to inhibit the voltage of power battery to continue to change to blanking voltage in time
Pressure reaches blanking voltage and the case where vehicle trouble occurs, and then the driving experience and safety of driver can be improved.This
Sample also can be effective even if large error occurs during managing to power battery electric current or power in BMS and VCU
It avoids leading to vehicle trouble due to power battery supercurrent or overpower operation.Moreover, by gradually decreasing power battery
Electric current perhaps power compared to power battery electric current or power carry out rapid drawdown, it is possible to prevente effectively from vehicle correlation
The acute variation of energy (such as power performance of vehicle etc.).
Detailed description of the invention
In order to more clearly explain the technical solutions in the embodiments of the present application, make required in being described below to embodiment
Attached drawing is briefly described, it should be apparent that, the accompanying drawings in the following description is only some implementations as described in this application
Example, for those of ordinary skill in the art, is also possible to obtain other drawings based on these drawings.
Fig. 1 is a kind of method flow schematic diagram for controlling power battery electric current or power in the embodiment of the present application；
Fig. 2 is the linear functional relation schematic diagram between the discharge power of power battery and the voltage of power battery；
Fig. 3 is that the linear functional relation between the discharge power of another power battery and the voltage of power battery is illustrated
Figure；
Fig. 4 is a kind of apparatus structure schematic diagram for controlling power battery electric current or power in the embodiment of the present application.
Specific embodiment
For the electric car in new-energy automobile, especially new-energy automobile, BMS and VCU are in control power battery
When charge/discharge current or charge/discharge power, it inevitably will appear error, for example, the calculated control power of BMS institute
The electric current of the battery operation signal that perhaps power is excessive or VCU is provided based on BMS to the electric current of power battery or power into
Mistake etc. is produced in row control time control, so that the electric current or power when power battery is currently run are beyond the practical quilt of power battery institute
The maximum current or power of permission.In this way, power battery with this electric current or Power operation for a period of time after, power battery
Voltage may be intended to blanking voltage.And it is corresponding in vehicle once being based on when the voltage of power battery reaches blanking voltage
Voltage protection strategy, it will usually the high tension loop in vehicle is interrupted, to cause vehicle trouble, for example, at power battery
When discharge condition, interrupting high tension loop may result in vehicle power interruption, influences the driving experience of driver, even drives
The traffic safety for the person of sailing.
Based on this, the embodiment of the present application provide it is a kind of control power battery electric current or power method, it is intended to by by
The maximum allowable running current or maximum allowable operation power of power battery are reduced, gradually to inhibit the voltage of power battery to tend to
In blanking voltage, to avoid the voltage due to power battery reaches blanking voltage and causes the generation of vehicle trouble.Specifically, can
To obtain the current voltage of power battery in real time；If it is determined that the current voltage of the power battery reaches the first predeterminated voltage, then table
It is bright at this time it may be necessary to electric current or power to power battery are managed, to inhibit the voltage of the power battery to continue
It is intended to blanking voltage, specifically can be the operating parameter for being gradually reduced the power battery, until the voltage of the power battery exists
Fluctuation before reaching the second predeterminated voltage is in the voltage stabilization of preset range namely power battery.Wherein, the power electric
The operating parameter in pond includes the maximum allowable running current or maximum allowable operation power of power battery, if power battery is in
Charged state, then the first predeterminated voltage is less than the second predeterminated voltage, and the second predeterminated voltage is not higher than blanking voltage；If power
Battery is in discharge condition, then the first predeterminated voltage is greater than the second predeterminated voltage, also, the second predeterminated voltage is not less than cut-off electricity
Pressure.As it can be seen that power battery electric current or power manage during, when the voltage of power battery tend to cut-off electricity
When pressure, by gradually decreasing the maximum allowable running current or maximum allowable operation power of power battery, it may be implemented gradually
The running current or operation power of power battery are reduced, so as to inhibit the voltage of power battery to continue to cut-off electricity in time
Buckling, effectively avoid the voltage due to power battery from reaching blanking voltage and occur vehicle trouble (such as vehicle power interrupt
Deng) the case where, and then the driving experience and safety of driver can be improved.In this way, even if BMS and VCU are to power
Battery current there is large error also during perhaps power is managed and can effectively avoid due to power battery supercurrent or
Overpower runs and leads to vehicle trouble.Moreover, by the electric current or power that gradually decrease power battery, compared to power
The electric current or power of battery carry out rapid drawdown, it is possible to prevente effectively from the play of vehicle correlated performance (such as power performance of vehicle etc.)
Strong variation.
In order to make the above objects, features, and advantages of the present application more apparent, below in conjunction with attached drawing to this Shen
Please the various non-limiting implementations in embodiment illustrate.Obviously, described embodiment is the application one
Section Example, instead of all the embodiments.Based on the embodiment in the application, those of ordinary skill in the art are not doing
All other embodiment obtained under the premise of creative work out, shall fall in the protection scope of this application.
Refering to fig. 1, Fig. 1 shows a kind of process for the method for controlling power battery electric current or power in the embodiment of the present application
Schematic diagram.Wherein, the method for the described control power battery electric current of the present embodiment or power can be applied to BMS, can also be with
Applied in other controllers in the vehicles such as VCU, it is also possible to that individual controller is arranged in the car, to utilize the control
Device processed executes method shown in FIG. 1.This method can specifically include:
S101: the current voltage of power battery is obtained.
In vehicle operation, the voltage of power battery usually differs larger with blanking voltage.Specifically, working as power electric
When pond is in discharge condition namely power battery and provides power for vehicle operation, the voltage of power battery is usually above cut-off electricity
Pressure；And when power battery is in charged state namely vehicle converts kinetic energy into electric energy to carry out energy regenerating, power battery
Voltage be usually less than blanking voltage.But in numerous scenes of practical application, when the electric current or power of power battery are higher
When, may be such that the voltage of power battery is intended to blanking voltage, and if when the voltage of power battery reaches blanking voltage,
In order to avoid being damaged to power battery or based on other Preservation tactics, it may be necessary to the high tension loop of vehicle is interrupted,
To guide vehicle trouble.It, can be in time to dynamic when the voltage of power battery is close to blanking voltage for this purpose, in the present embodiment
The electric current or power of power battery are managed.
Based on this, the voltage of power battery can be monitored in real time, to obtain the current voltage of power battery in real time,
In order to which the current voltage according to the power battery judges whether it is intended to blanking voltage.It is worth noting that, working as power electric
When pond is in charged state, if the electric current of power battery or power long period be persistently higher than the maximum current that it is allowed to or
Person's power, then the voltage of power battery may be gradually increased to blanking voltage；And when power battery is in discharge condition, if
The electric current of power battery or power long period are persistently higher than its maximum current or power for being allowed to provide, then the power
The voltage of battery may be gradually decrease to blanking voltage.
S102: if it is determined that the current voltage of power battery reaches the first predeterminated voltage, then it is gradually reduced the fortune of power battery
Row parameter, until the voltage of the power battery is in preset range reaching the fluctuation before the second predeterminated voltage；Wherein, described
The operating parameter of power battery includes the maximum allowable running current or maximum allowable operation power of power battery, if power electric
Pond is in charged state, then, the first predeterminated voltage is less than the second predeterminated voltage, also, the second predeterminated voltage is not higher than cut-off electricity
Pressure；If the power battery is in discharge condition, the first predeterminated voltage is greater than the second predeterminated voltage, also, the second predeterminated voltage
Not less than blanking voltage.
In the present embodiment, when the current voltage of power battery reaches the first predeterminated voltage, show to start to adjust at this time
The operating parameter of the power battery of whole BMS instruction, so as to power battery the operating parameter based on power battery adjusted into
When row operation, enables to the voltage of power battery that can slow down and be intended to blanking voltage, the phase even between blanking voltage
Difference becomes larger.Wherein, the operating parameter of power battery, the as maximum allowable running current of power battery or maximum allowable operation
Power, when power battery is in charged state, which is maximum allowable charging current, which permits
Perhaps operation power is maximum allowable charge power；And when power battery is in discharge condition, the maximum allowable running current
As maximum allowable discharge current, which is maximum allowable discharge power.
When specific implementation, when power battery is in charged state, the voltage of power battery may be because of power battery
It is gradually increased, is then preset when the voltage of power battery increases to first with larger (either excessive) electric current or Power operation
When voltage, start the maximum allowable charging current for reducing the power battery that BMS is provided or maximum allowable charge power, with control
Power battery is with relatively low electric current or Power operation, so that the voltage for reducing power battery is realized, so that power electric
The voltage in pond will not rise to blanking voltage.Under normal conditions, the voltage of power battery once reaches blanking voltage, may lead
It dispatches a car and a corresponding failure occurs, therefore, in some possible embodiments, the voltage that can control power battery is no more than
Second predeterminated voltage (at this point, second predeterminated voltage is greater than the first predeterminated voltage), also, second predeterminated voltage is lower than cut-off
Voltage.In this way, even if the voltage of power battery increases to the second predeterminated voltage, since the second predeterminated voltage is less than blanking voltage,
The case where causing vehicle trouble because of the overtension of power battery will not occur.Certainly, in other possible embodiment party
In formula, it is also possible to set the blanking voltage of power battery as second predeterminated voltage.
And when power battery is in discharge condition, the voltage of power battery may because of power battery with it is larger (or
Person is excessive) electric current or Power operation and gradually decrease, for this purpose, in the present embodiment, when the voltage drop of power battery is down to
When one predeterminated voltage, start the maximum allowable discharge current or maximum allowable discharge power that reduce the power battery that BMS is provided,
To reduce electric current or power when power battery operation, so that the voltage of power battery will not continue to be reduced to cut-off electricity
Pressure.In this embodiment, specifically can be control power battery voltage not less than the second predeterminated voltage (at this point, this second
Predeterminated voltage is less than the first predeterminated voltage), also, second predeterminated voltage is greater than blanking voltage.In this way, even if power battery
Voltage drop will not occur since the second predeterminated voltage is greater than blanking voltage because of power battery down to the second predeterminated voltage
Brownout and the case where cause vehicle trouble.Certainly, in other possible embodiments, it is also possible to set power battery
Blanking voltage be second predeterminated voltage.
It is worth noting that, if reducing the operation of power battery when the voltage of power battery reaches the first predeterminated voltage
Parameter is excessively violent, may make the performance of vehicle that acute variation occur.By taking power battery is in discharge condition as an example, needing
When reducing the output power of power battery, if the maximum allowable discharge power of power battery that BMS is provided directly is die-offed 50%,
Power battery is that power provided by vehicle may fall sharply as original half under the action of the control signal of BMS, thus
Allow the operator to the acute variation for being clearly felt that vehicle power, in some instances it may even be possible to can because vehicle power suddenly change and
Influence the traffic safety of driver.
For this purpose, being gradually the operating parameter of power battery to be adjusted, and be not control power electric in the present embodiment
The operating parameter in pond die-offs, and the electric current or power when this runs power battery will not mutate, so as to
Avoid vehicle performance that acute variation occurs.Still by taking power battery is in discharge condition as an example, needing to reduce the defeated of power battery
Out when power, the maximum allowable discharge power of power battery provided by BMS can be gradually decreased within a certain period of time, and it is every
It is secondary only to reduce the 1% of initial power (the maximum allowable discharge power of power battery provided by BMS before reducing).Pass through
The mode of this gentle maximum allowable discharge power for reducing power battery provided by BMS, can gradually decrease power electric
The discharge power in pond, so that power battery is that the power that vehicle provides also can be reduced gently accordingly, thus realizing power
During the output power of battery is reduced to original 50%, the power of vehicle will not mutate, and then can be as far as possible
Reduce the influence that vehicle power variation drives vehicle to driver.
In the present embodiment, in a kind of gentle operating parameter embodiment for reducing power battery, it can be and pre-establish
Linear functional relation between the voltage of power battery and the operating parameter of power battery, when the voltage of power battery reaches first
When predeterminated voltage, it can be based on the linear functional relation, determine power battery corresponding to the voltage of power battery at this time
Target operating parameters, so as to which the operating parameter of power battery is reduced to the target operating parameters.For example, it is assumed that power electric
Pond is currently at discharge condition, when the voltage of power battery reaches the first predeterminated voltage, can use as shown in Figure 2 linear
Functional relation reduces the discharge power of power battery.Certainly, in other possible embodiments, it is also possible to using non-thread
Property functional relation reduces the operating parameter of power battery.
And in other possible embodiments, after being also possible to determine reduction every time based on the gradient successively successively decreased
The operating parameter of power battery.As an example, can be determined based on the current voltage of power battery successively successively decrease it is more
A gradient parameter, the gradient parameter can be the maximum allowable running current or maximum allowable operation power of power battery；So
It afterwards, can be according to the multiple gradient parameters successively to successively decrease determined, to be gradually reduced the operating parameter of power battery, specifically
It can be and the operating parameter of power battery is successively reduced to each gradient parameter.In this embodiment, multiple similar
Different voltages likely correspond to same gradient parameter.For example, it is assumed that power battery is currently at discharge condition, when power battery
When voltage reaches the first predeterminated voltage, piecewise function relationship as shown in Figure 3 can use to reduce the electric discharge function of power battery
Rate.
In practical application, after gradually decreasing the operating parameter of power battery, the voltage of power battery becomes to blanking voltage
The trend of change is gradually suppressed, so that the voltage of power battery in power battery reaches blanking voltage, (or second is pre-
If voltage) gradually tend to stablize before.Therefore, during the operating parameter to power battery is adjusted, if power electric
The voltage in pond tends towards stability, and the voltage of specially power battery reaches the wave before blanking voltage (or second predeterminated voltage)
It is dynamic to be in preset range, then it can stop the operating parameter for reducing power battery.For example, the voltage when power battery is continuing
Voltage in 1 second is always between preset voltage region, or the difference between the maximum voltage and minimum voltage in this 1 second
When preset value corresponding less than above-mentioned preset range, the operating parameter for reducing power battery can be stopped.
When specific implementation, however, it is determined that power battery is in charged state and the current voltage of power battery increases to first
Predeterminated voltage can then be gradually reduced the operating parameter of power battery, until the voltage of power battery is to increase to second default
Voltage is in the first preset range for the fluctuation before blanking voltage；And if it is determined that power battery is in discharge condition simultaneously
And the current voltage of power battery is reduced to the first predeterminated voltage, then can be gradually reduced the operating parameter of power battery, until
The voltage of power battery be reduced to the second predeterminated voltage or for blanking voltage before fluctuation be in the second preset range.
Further, during controlling the operating parameter of power battery, however, it is determined that the voltage of power battery reaches the
Two predeterminated voltages, then the operating parameter that can control power battery is 0, that is, is reduced to the electric current of power battery or power
0, so that the voltage of power battery is unable to reach blanking voltage.Certainly, it in other possible embodiments, also can control
The operating parameter of power battery is lower than preset threshold, for example, the power that can control power battery is lower than 10 kilowatts etc., at this point,
Since the operation power of power battery is lower, the voltage of power battery is generally also unable to reach blanking voltage.
In practical application, when the voltage of power battery differs larger with blanking voltage, can persistently it be provided based on BMS
The operating parameter of signal control power battery.Specifically, if it is determined that power battery is the current of charged state and power battery
Voltage is lower than the first predeterminated voltage, or, however, it is determined that power battery is discharge condition, and the current voltage of power battery is higher than
First predeterminated voltage, then electric current or power when can be run based on the signal control power battery that BMS is provided.Such as Fig. 2 or
Shown in Fig. 3, when power battery is in discharge condition, the operating parameter for reducing power battery may not need, and can continue base
In the discharge power for the signal control power battery that BMS is provided.
In the present embodiment, the current voltage of power battery can be obtained in real time；If it is determined that the current voltage of the power battery
Reach the first predeterminated voltage, then shows at this time it may be necessary to electric current or power to power battery are managed, to press down
The voltage for making the power battery continues to be intended to blanking voltage, specifically can be the operating parameter for being gradually reduced the power battery,
Until fluctuation of the voltage of the power battery before reaching the second predeterminated voltage is in the electricity of preset range namely power battery
Pressure is stablized.Wherein, the operating parameter of the power battery includes the maximum allowable running current or maximum allowable of power battery
Power is run, if power battery is charged state, the first predeterminated voltage is less than the second predeterminated voltage, and the second predeterminated voltage
Not higher than blanking voltage；If power battery is discharge condition, the first predeterminated voltage is greater than the second predeterminated voltage, also, second
Predeterminated voltage is not less than blanking voltage.As it can be seen that power battery electric current or power manage during, work as power
When the voltage of battery tends to blanking voltage, by gradually decrease power battery maximum allowable running current or maximum allowable fortune
The running current for gradually decreasing power battery or operation power may be implemented, so as to inhibit power electric in time in row power
The voltage in pond continues to change to blanking voltage, effectively avoids the voltage due to power battery from reaching blanking voltage and vehicle event occurs
The case where barrier, and then the driving experience and safety of driver can be improved.In this way, even if BMS and VCU are to power electric
There is large error also during perhaps power is managed and can effectively avoid due to power battery supercurrent or super in pond electric current
Power operation and lead to vehicle trouble.Moreover, by the electric current or power that gradually decrease power battery, compared to power electric
The electric current or power in pond carry out rapid drawdown, it is possible to prevente effectively from vehicle correlated performance (such as power performance of vehicle etc.) is violent
Variation.
In addition, the embodiment of the present application also provides a kind of control power battery electric current or the devices of power.Refering to Fig. 4, Fig. 4
Show the apparatus structure schematic diagram the embodiment of the present application also provides a kind of control power battery electric current or power.The device
400 include:
Module 401 is obtained, for obtaining the current voltage of power battery；
Reduce module 402, for if it is determined that the current voltage of the power battery reaches the first predeterminated voltage, then gradually subtracting
The operating parameter of the small power battery, until fluctuation of the voltage of the power battery before reaching the second predeterminated voltage is in
In preset range, the operating parameter of the power battery include power battery maximum allowable running current or maximum allowable fortune
Row power；
Wherein, if the power battery is in charged state, first predeterminated voltage is less than second predeterminated voltage,
Second predeterminated voltage is not higher than blanking voltage；If the power battery is in discharge condition, first predeterminated voltage is big
In second predeterminated voltage, second predeterminated voltage is not less than the blanking voltage.
In some possible embodiments, second predeterminated voltage is the blanking voltage, the reduction module
402, comprising:
First reduction unit, for if it is determined that the power battery is in the current electricity of charged state and the power battery
Pressure increases to first predeterminated voltage, then is gradually reduced the operating parameter of the power battery, until the power battery
Voltage is in the first preset range in the fluctuation range before increasing to the blanking voltage；
Second reduction unit, for if it is determined that the power battery is in the current electricity of discharge condition and the power battery
Pressure drop is then gradually reduced the operating parameter of the power battery down to first predeterminated voltage, until the power battery
Voltage is in the second preset range in the fluctuation range before being reduced to the blanking voltage.
In some possible embodiments, the reduction module 402, specifically for the voltage according to the power battery
The preset linear functional relation between the operating parameter of the power battery is gradually reduced the operation ginseng of the power battery
Number.
In some possible embodiments, the reduction module 402, comprising:
Determination unit determines the multiple gradient parameters successively to successively decrease, institute for the current voltage based on the power battery
State the maximum allowable running current or maximum allowable operation power that gradient parameter includes the power battery；
Third reduction unit, for being gradually reduced the power battery according to the multiple gradient parameters successively to successively decrease
Operating parameter.
In some possible embodiments, described device 400 further include:
First control module, for if it is determined that the power battery is in the current electricity of charged state and the power battery
It forces down in first predeterminated voltage, alternatively, determining that the power battery is in the current of discharge condition and the power battery
Voltage is higher than first predeterminated voltage, then the signal provided based on battery management system is controlled when the power battery is run
Electric current or power.
In some possible embodiments, described device 400 further include:
Second control module, for if it is determined that the voltage of the power battery reaches second predeterminated voltage, then controlling
The electric current or power of the power battery are 0 or are lower than preset threshold.
It should be noted that the contents such as information exchange, implementation procedure between each module of above-mentioned apparatus, unit, due to
Embodiment of the method is based on same design in the embodiment of the present application, and method is implemented in bring technical effect and the embodiment of the present application
Example is identical, particular content can be found in the embodiment of the present application it is aforementioned shown in narration in embodiment of the method, details are not described herein again.
In the present embodiment, to power battery electric current or power manage during, when the electricity of power battery
When pressure tends to blanking voltage, by gradually decreasing the maximum allowable running current or maximum allowable operation power of power battery,
It may be implemented to gradually decrease the running current of power battery or run power, so as to inhibit the voltage of power battery in time
Continue to change to blanking voltage, effectively avoids the voltage due to power battery from reaching blanking voltage and the feelings of vehicle trouble occur
Condition, and then the driving experience and safety of driver can be improved.In this way, even if BMS and VCU is to power battery electric current
Perhaps occurring large error during power is managed also can effectively avoid transporting due to power battery supercurrent or overpower
It goes and leads to vehicle trouble.Moreover, by the electric current or power that gradually decrease power battery, compared to the electricity to power battery
Stream or power carry out rapid drawdown, it is possible to prevente effectively from the acute variation of vehicle correlated performance (such as power performance of vehicle etc.).
" the first predeterminated voltage ", " the first preset range ", " the first reduction unit ", " mentioned in the embodiment of the present application
" first " in the titles such as one control module " is used only to do name mark, does not represent first sequentially.The rule is same
Suitable for " second ", " third " etc..
As seen through the above description of the embodiments, those skilled in the art can be understood that above-mentioned implementation
All or part of the steps in example method can add the mode of general hardware platform to realize by software.Based on this understanding,
The technical solution of the application can be embodied in the form of software products, which can store is situated between in storage
In matter, such as read-only memory (English: read-only memory, ROM)/RAM, magnetic disk, CD etc., including some instructions to
So that a computer equipment (can be the network communication equipments such as personal computer, server, or router) executes
Method described in certain parts of each embodiment of the application or embodiment.
All the embodiments in this specification are described in a progressive manner, same and similar portion between each embodiment
Dividing may refer to each other, and each embodiment focuses on the differences from other embodiments.Especially for device reality
For applying example, since it is substantially similar to the method embodiment, so describing fairly simple, related place is referring to embodiment of the method
Part explanation.The apparatus embodiments described above are merely exemplary, wherein mould as illustrated by the separation member
Block may or may not be physically separated, and the component shown as module may or may not be physics
Module, it can it is in one place, or may be distributed over multiple network units.It can select according to the actual needs
Some or all of the modules therein achieves the purpose of the solution of this embodiment.Those of ordinary skill in the art are not paying creation
Property labour in the case where, it can understand and implement.
The above is only the illustrative embodiment of the application, is not intended to limit the protection scope of the application.
Claims (10)
1. a kind of method of control power battery electric current or power, which is characterized in that the described method includes:
Obtain the current voltage of power battery；
If it is determined that the current voltage of the power battery reaches the first predeterminated voltage, then the operation of the power battery is gradually reduced
Parameter, until the voltage of the power battery is in preset range reaching the fluctuation before the second predeterminated voltage, the power
The operating parameter of battery includes the maximum allowable running current or maximum allowable operation power of power battery；
Wherein, if the power battery is in charged state, first predeterminated voltage is less than second predeterminated voltage, described
Second predeterminated voltage is not higher than blanking voltage；If the power battery is in discharge condition, first predeterminated voltage is greater than institute
The second predeterminated voltage is stated, second predeterminated voltage is not less than the blanking voltage.
2. the method according to claim 1, wherein second predeterminated voltage be the blanking voltage, it is described
If it is determined that the current voltage of the power battery reaches the first predeterminated voltage, then the operation ginseng of the power battery is gradually reduced
Number, until the voltage of the power battery is in preset range reaching the fluctuation before the second predeterminated voltage, comprising:
If it is determined that increase to described first default for the current voltage that the power battery is in charged state and the power battery
Voltage is then gradually reduced the operating parameter of the power battery, until the voltage of the power battery is increasing to the cut-off
Fluctuation range before voltage is in the first preset range；
If it is determined that the power battery is in discharge condition and the current voltage of the power battery is reduced to described first to preset
Voltage is then gradually reduced the operating parameter of the power battery, until the voltage of the power battery is being reduced to the cut-off
Fluctuation range before voltage is in the second preset range.
3. the method according to claim 1, wherein the operating parameter for being gradually reduced the power battery,
Include:
According to preset linear functional relation between the voltage of the power battery and the operating parameter of the power battery, gradually
Reduce the operating parameter of the power battery.
4. the method according to claim 1, wherein the operating parameter for being gradually reduced the power battery,
Include:
Determine that the multiple gradient parameters successively to successively decrease, the gradient parameter include described based on the current voltage of the power battery
The maximum allowable running current of power battery or maximum allowable operation power；
According to the multiple gradient parameters successively to successively decrease, it is gradually reduced the operating parameter of the power battery.
5. method according to any one of claims 1 to 4, which is characterized in that the method also includes:
If it is determined that the power battery is in charged state and the current voltage of the power battery is default lower than described first electric
Pressure, alternatively, determining that the power battery is in discharge condition and the current voltage of the power battery is default higher than described first
Voltage, the then signal provided based on battery management system control the electric current or power when power battery operation.
6. method according to any one of claims 1 to 4, which is characterized in that the method also includes:
If it is determined that the voltage of the power battery reaches second predeterminated voltage, then the electric current or function of the power battery are controlled
Rate is 0 or is lower than preset threshold.
7. the device of a kind of control power battery electric current or power, which is characterized in that described device includes:
Module is obtained, for obtaining the current voltage of power battery；
Reduce module, it is described for if it is determined that the current voltage of the power battery reaches the first predeterminated voltage, being then gradually reduced
The operating parameter of power battery, until fluctuation of the voltage of the power battery before reaching the second predeterminated voltage is in default model
In enclosing, the operating parameter of the power battery includes the maximum allowable running current or maximum allowable operation function of power battery
Rate；
Wherein, if the power battery is in charged state, first predeterminated voltage is less than second predeterminated voltage, described
Second predeterminated voltage is not higher than blanking voltage；If the power battery is in discharge condition, first predeterminated voltage is greater than institute
The second predeterminated voltage is stated, second predeterminated voltage is not less than the blanking voltage.
8. device according to claim 7, which is characterized in that second predeterminated voltage is the blanking voltage, described
Reduce module, comprising:
First reduction unit, for if it is determined that the current voltage that the power battery is in charged state and the power battery increases
First predeterminated voltage is added to, then is gradually reduced the operating parameter of the power battery, until the voltage of the power battery
It is in the first preset range in the fluctuation range before increasing to the blanking voltage；
Second reduction unit, for if it is determined that the power battery is in the current voltage drop of discharge condition and the power battery
Down to first predeterminated voltage, then it is gradually reduced the operating parameter of the power battery, until the voltage of the power battery
It is in the second preset range in the fluctuation range before being reduced to the blanking voltage.
9. device according to claim 7, which is characterized in that the reduction module is specifically used for according to the power electric
Preset linear functional relation between the voltage in pond and the operating parameter of the power battery, is gradually reduced the power battery
Operating parameter.
10. device according to claim 7, which is characterized in that the reduction module, comprising:
Determination unit determines the multiple gradient parameters successively to successively decrease, the ladder for the current voltage based on the power battery
Degree parameter includes the maximum allowable running current or maximum allowable operation power of the power battery；
Third reduction unit, for being gradually reduced the fortune of the power battery according to the multiple gradient parameters successively to successively decrease
Row parameter.
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