CN106080239A - The low tension battery charge control method of electric vehicle and electric vehicle - Google Patents
The low tension battery charge control method of electric vehicle and electric vehicle Download PDFInfo
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- CN106080239A CN106080239A CN201610515448.6A CN201610515448A CN106080239A CN 106080239 A CN106080239 A CN 106080239A CN 201610515448 A CN201610515448 A CN 201610515448A CN 106080239 A CN106080239 A CN 106080239A
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- low tension
- power supply
- tension battery
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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
- B60L58/18—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries of two or more battery modules
- B60L58/20—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries of two or more battery modules having different nominal voltages
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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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- Transportation (AREA)
- Mechanical Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Secondary Cells (AREA)
Abstract
The invention discloses the low tension battery charge control method of a kind of electric vehicle, wherein, electric vehicle includes high voltage power supply, low tension battery and power supply changeover device, power supply changeover device is connected with high voltage power supply and low tension battery respectively, charge control method comprises the following steps: the entire car controller of electric vehicle detects the operational mode that electric vehicle is current, wherein, operational mode includes drive mode and car-parking model；If electric vehicle is in car-parking model, then after high voltage power supply stops High voltage output, entire car controller obtains the information about power of low tension battery every Preset Time；When the electricity of low tension battery is less than charging lower threshold, vehicle control unit controls power supply changeover device starts so that high-tension electricity is converted to low tension, thinks that low tension battery charges.This low tension battery charge control method can reduce electric vehicle low tension battery when car-parking model and the risk of power shortage occurs.The invention also discloses a kind of electric vehicle.
Description
Technical field
The invention belongs to technical field of vehicle, particularly relate to the low tension battery charge control method of a kind of electric vehicle,
And one electric vehicle.
Background technology
Electric vehicle includes high pressure and two kinds of Vehicular power systems of low pressure, and wherein high voltage power supply is mainly used in providing whole
The driving power of car, low voltage electric power system is then mainly used in the low-voltage electrical appliance to car load provides power supply output.Low pressure at present
The electric pressure of power-supply system is usually 12V or 24V, and the most frequently used low voltage electric power system is lead-acid accumulator.
In the normal driving process of car load, it is common that started output by vehicle power modular converter such as power supply changeover device low
Pressure, on the one hand the low pressure of output power for car load low-pressure system, on the other hand charges for low tension battery；And shelve at car load or
In charging process, then it is to be exported low pressure by low tension battery, the now part low-voltage electrical appliance of car load often electricity work.So stopping
Car easily produces the risk of low tension battery power shortage in the case of especially vehicle is shelved for a long time.
Summary of the invention
It is contemplated that one of technical problem solved the most to a certain extent in correlation technique.
To this end, the present invention needs to propose the low tension battery charge control method of a kind of electric vehicle, this charging controlling party
Method can reduce the risk of low tension battery generation power shortage when stopping.
The present invention also proposes a kind of electric vehicle.
In order to solve the problems referred to above, the low tension battery charge control method of the electric vehicle of one aspect of the present invention, wherein,
Described electric vehicle includes high voltage power supply, low tension battery and power supply changeover device, described power supply changeover device respectively with described high pressure
Power supply is connected with described low tension battery, and described charge control method comprises the following steps: the full-vehicle control of described electric vehicle
The operational mode that device detection electric vehicle is current, wherein, described operational mode includes drive mode and car-parking model；If it is described
Electric vehicle is in described car-parking model, then after described high voltage power supply stops High voltage output, described entire car controller every
Preset Time obtains the information about power of described low tension battery；When the electricity of described low tension battery is less than charging lower threshold
Time, power supply changeover device described in described vehicle control unit controls starts so that high-tension electricity is converted to low tension, thinks that described low pressure stores
Battery charges.
The low tension battery charge control method of the electric vehicle of the embodiment of the present invention, is in car-parking model at electric vehicle
Time, after high voltage power supply stops High voltage output, entire car controller obtains the information about power of low tension battery every Preset Time,
And when the electricity of low tension battery is less than charging lower threshold, controls power supply changeover device startup and think that low tension battery charges,
Thereby may be ensured that electric vehicle, in the especially low tension battery electricity abundance when shelving for a long time of stopping, reduces wind power shortage occur
Danger is to affect normal vehicle operation, and ensures the service life of low tension battery.
Described electric vehicle also includes timer, if described electric vehicle is in described car-parking model, then at described height
After voltage source stops High voltage output, described entire car controller obtains the electricity letter of described low tension battery every Preset Time
Breath, farther includes: if described electric vehicle is in described car-parking model, then described high voltage power supply stop High voltage output it
After, described entire car controller sends riming instructions to described timer so that described timer initiation timing, and described car load control
Device processed enters resting state；And
When the timing time of described timer reaches described Preset Time, described entire car controller is receiving described meter
Time device wake up instruction up after be waken up, then control described high voltage power supply output and obtain described low tension battery electricity letter
Breath.
Specifically, described timer includes data acquisition unit DAU.
When the electricity of described low tension battery is less than charging lower threshold, power supply described in described vehicle control unit controls turns
Parallel operation starts so that high-tension electricity is converted to low tension, thinks that described low tension battery charges, farther includes: when described low pressure stores
When the electricity of battery is less than described charging lower threshold, described in described vehicle control unit controls, power supply changeover device starts with by described
The high-tension electricity of high voltage power supply output is converted to low tension, thinks that described low tension battery charges；Or, when described low tension battery
Electricity less than described charging lower threshold time, power supply changeover device described in described vehicle control unit controls starts with by external power supply
High-tension electricity be converted to low tension, think that described low tension battery charges.
Further, above-mentioned charge control method also includes: when the electricity of described low tension battery reaches charging upper limit threshold
During value, power supply changeover device described in described vehicle control unit controls stops charging for described low tension battery and controlling described high-tension electricity
Source stops output；And, described entire car controller enters resting state.
It addition, above-mentioned charge control method also includes: if described electric vehicle is in described drive mode, the most described whole
Vehicle controller obtains the information about power of described low tension battery in real time；And fill described in being less than when the electricity of described low tension battery
During electricity lower threshold, power supply changeover device described in described vehicle control unit controls starts with the high-tension electricity described high voltage power supply exported
Be converted to low tension, think that described low tension battery charges, such that it is able to reduce the power shortage risk of low tension battery when driving,
Ensure the service life of low tension battery.
Further, above-mentioned charge control method also includes: when the electricity of described low tension battery reaches charging upper limit threshold
During value, power supply changeover device described in described vehicle control unit controls stops charging for described low tension battery.
In order to solve the problems referred to above, the electric vehicle that another aspect of the present invention proposes, including: high voltage power supply, for for electric
Motor-car provides and drives power；Low tension battery, provides power supply for the low-voltage electrical appliance for described electric vehicle；Electric power detection
Device, for detecting the electricity of described low tension battery；Power supply changeover device, described power supply changeover device respectively with described high voltage power supply and
Described low tension battery is connected；Entire car controller, the operational mode that described entire car controller detection electric vehicle is current, wherein,
Described operational mode includes drive mode and car-parking model, when described electric vehicle is in car-parking model and at described high-tension electricity
After source stops High voltage output, described entire car controller obtains the information about power of described low tension battery every Preset Time, and
When the electricity of described low tension battery is less than charging lower threshold, controls described power supply changeover device and start to change high-tension electricity
For low tension, think that described low tension battery charges.
The electric vehicle of the embodiment of the present invention, after being in car-parking model and high voltage power supply stopping High voltage output, car load
Controller obtains the information about power of low tension battery every Preset Time, and when the electricity of low tension battery is less than charging lower limit threshold
During value, control power supply changeover device startup and think that low tension battery charges, thereby may be ensured that electric vehicle is especially being grown in parking
When phase shelves, low tension battery electricity is sufficient, reduces and the risk of power shortage occurs to affect normal vehicle operation, and ensures that low pressure stores
The service life of battery.
Further, described electric vehicle also includes: timer, and described entire car controller is in institute at described electric vehicle
State car-parking model and stop after High voltage output in described high voltage power supply, sending riming instructions to described timer so that described meter
Time device start timing, and described entire car controller enters resting state, and reaches described pre-at the timing time of described timer
If during the time, what described entire car controller received described timer wakes up instruction up, and controls described high-tension electricity after being woken
Source exports and obtains the information about power of described low tension battery.
Specifically, described timer includes data acquisition unit ADU.
Wherein, power supply changeover device described in described vehicle control unit controls starts with the high-tension electricity described high voltage power supply exported
Be converted to low tension, or, power supply changeover device described in described vehicle control unit controls starts to be turned by the high-tension electricity of external power supply
It is changed to low tension, thinks that described low tension battery charges.
Further, described entire car controller is additionally operable to reach charging upper limit threshold value at the electricity of described low tension battery
Time, control described power supply changeover device and stop charging for described low tension battery and controlling the stopping output of described high voltage power supply, and
Described entire car controller enters resting state.
It addition, described entire car controller is additionally operable to when described electric vehicle is in drive mode, obtain described low in real time
The information about power of pressure accumulator, and when the electricity of described low tension battery is less than described charging lower threshold, control described electricity
Source converter starts so that the high-tension electricity that described high voltage power supply exports is converted to low tension, thinks that described low tension battery charges,
Thus the risk of power shortage occurs in low tension battery when reducing driving, extend the service life of low tension battery.
Further, described entire car controller is additionally operable to reach charging upper limit threshold value at the electricity of described low tension battery
Time, control described power supply changeover device and stop charging for described low tension battery.
Accompanying drawing explanation
Fig. 1 is the flow process of the low tension battery charge control method of electric vehicle according to an embodiment of the invention
Figure；
Fig. 2 is the low tension battery charging under car-parking model of the electric vehicle of a specific embodiment according to the present invention
The flow chart of control method；
Fig. 3 is the flow process of the low tension battery charge control method of electric vehicle according to another embodiment of the invention
Figure；
Fig. 4 is that the electric vehicle of another specific embodiment according to present invention low tension battery under drive mode fills
The flow chart of electric control method；
Fig. 5 is the block diagram of electric vehicle according to an embodiment of the invention；And
Fig. 6 is the block diagram of electric vehicle according to another embodiment of the invention.
Detailed description of the invention
Embodiments of the invention are described below in detail, and the example of described embodiment is shown in the drawings, the most from start to finish
Same or similar label represents same or similar element or has the element of same or like function.Below with reference to attached
The embodiment that figure describes is exemplary, it is intended to is used for explaining the present invention, and is not considered as limiting the invention.
The low tension battery charging controlling party of the electric vehicle proposed according to embodiments of the present invention is described with reference to the accompanying drawings
Method and electric vehicle.
Fig. 1 is the flow process of the low tension battery charge control method of electric vehicle according to an embodiment of the invention
Figure, wherein, electric vehicle includes high voltage power supply such as electrokinetic cell, low tension battery and power supply changeover device, and power supply changeover device divides
Not being connected with high voltage power supply and low tension battery, high voltage power supply such as electrokinetic cell is for providing driving power, low pressure for car load
The low-voltage electrical appliance that accumulator is electric vehicle such as cooling system, vacuum system etc. provide low-tension supply, power supply changeover device example
As low pressure is such as converted to high pressure for changing supply voltage or high pressure is converted to low pressure by DC/DC transducer.
As it is shown in figure 1, the low tension battery charge control method of this electric vehicle comprises the following steps:
S1, the entire car controller of electric vehicle detects the operational mode that electric vehicle is current, and wherein, operational mode includes row
Car pattern and car-parking model.Such as, entire car controller obtains the row of each sensor or assistant controller by the CAN network of car load
Car status data such as key information, GES, wheel speed signal, brake signal, and then judge to work as according to driving states data
Front electric vehicle is drive mode or car-parking model, and such as key starts, speed is not zero, without brake signal, wheel speed is not
May determine that when zero that electric vehicle is travelling, otherwise be in dead ship condition.
S2, if electric vehicle is in car-parking model, then after high voltage power supply stops High voltage output, i.e. at car load high pressure
After lower electricity, entire car controller obtains the information about power of low tension battery every Preset Time.
Usually, under car load high pressure after electricity, entire car controller also enters resting state, so in the enforcement of the present invention
In example, an entire car controller can be waken up up every Preset Time, and then entire car controller obtains low pressure electric power storage by CAN
The information about power in pond.
In one embodiment of the invention, electric vehicle also includes timer, if electric vehicle is in car-parking model,
Then stopping after High voltage output in high voltage power supply, entire car controller sends riming instructions to timer so that timer initiation meter
Time, and entire car controller entrance resting state；When the timing time of timer reaches Preset Time, entire car controller is receiving
To timer wake up instruction up after be waken up, then control high voltage power supply output and obtain low tension battery information about power.
Specifically, timer includes data acquisition unit DAU (digital acquisition unit), data acquisition list
Unit DAU has time clock feature and can send wake-up signal to entire car controller.
S3, when the electricity of low tension battery is less than charging lower threshold, vehicle control unit controls power supply changeover device starts
So that high-tension electricity is converted to low tension, think that low tension battery charges.
Entire car controller judges whether to need to charge for low tension battery, to avoid low pressure according to the electricity of low tension battery
There is electric deficiency phenomenon in accumulator, especially when vehicle is shelved for a long time, it is ensured that the normal supply of vehicle low pressure.When low tension battery
When electricity is less than charging lower threshold, then explanation needs to charge for low tension battery, and otherwise low tension battery i.e. will appear from power shortage
Problem, then vehicle control unit controls power supply changeover device such as DC/DC transducer starts so that high-tension electricity is converted to low tension such as
12V or 24V voltage, thinks that low tension battery charges.
Specifically, when the electricity of low tension battery is less than charging lower threshold, entire car controller can control power supply and turn
Parallel operation starts so that the high-tension electricity that high voltage power supply exports is converted to low tension, thinks that low tension battery charges；Or, when low pressure stores
When the electricity of battery is less than charging lower threshold, entire car controller can control power supply changeover device and start with by the height of external power supply
Piezoelectricity is converted to low tension, thinks that low tension battery charges.Put it briefly, when electric vehicle is in car-parking model, if low
Pressure accumulator needs charging, then vehicle control unit controls transducer starts with by the high-tension electricity of high voltage power supply or external power supply such as
380V voltage is converted to low tension such as 12V, to supply low tension battery, it is ensured that the electricity of low tension battery is sufficient to avoid out
Existing electric deficiency phenomenon, affects electric vehicle and starts, shorten the low tension battery life-span.
It can be seen that the low tension battery charge control method of the electric vehicle of the embodiment of the present invention, at electric vehicle
When car-parking model, after high voltage power supply stops High voltage output, entire car controller obtains low tension battery every Preset Time
Information about power, and when low tension battery electricity less than charging lower threshold time, control power supply changeover device start thinks low pressure
Accumulator is charged, and thereby may be ensured that electric vehicle, in the especially low tension battery electricity abundance when shelving for a long time of stopping, reduces
The risk of power shortage occurs to affect normal vehicle operation, and ensure the service life of low tension battery.
Further, when the electricity of low tension battery reaches charging upper limit threshold value, vehicle control unit controls Power convert
Device stops charging and control high voltage power supply stopping output for low tension battery and is in preferable shape with the electricity ensureing low tension battery
State, entire car controller enters resting state.
Fig. 2 is low tension battery charging when being in car-parking model of the electric vehicle of a specific embodiment according to the present invention
The flow chart controlled, as in figure 2 it is shown, the method includes:
S110, electricity under electric vehicle high pressure, entire car controller VCU transmission riming instructions to data acquisition unit DAU.
S120, data acquisition unit ADU carry out timing, and data acquisition unit ADU starts meter after receiving riming instructions
Time.
S130, it is judged that whether the timing time of data acquisition unit ADU reaches Preset Time, if it is, enter step
S140, otherwise returns step S120.
S140, data acquisition unit ADU wake up entire car controller VCU up, and vehicle control unit controls electric vehicle high pressure powers on.
S150, it is judged that whether the electricity of low tension battery is less than charging lower threshold, if it is, enter step S160,
Otherwise return step S110.
S160, high-tension electricity or the high-tension electricity of external power supply that electrokinetic cell is exported by control DC/DC transducer are converted to
Low tension is to charge to low tension battery.
S170, it is judged that whether the electricity of low tension battery reaches charging upper limit threshold value, if it is, enter step S180,
Otherwise return step S160.
S180, DC/DC transducer stops charging for low tension battery, and entire car controller enters resting state, and returns step
Rapid S110.
It can be seen that under car-parking model in the charging control process of low tension battery, main table quantitatively includes data acquisition
The collection timing time of unit ADU, the charging lower threshold of low tension battery and the charging upper limit threshold value of low tension battery.
In a word, the low tension battery charge control method of the electric vehicle of the embodiment of the present invention, can reduce during parking outstanding
It is electric vehicle power shortage risk of low tension battery when shelving for a long time, extends low tension battery service life, and low cost,
Safety is high.
On the other hand, the low tension battery charge control method of the electric vehicle of the embodiment of the present invention, it is also possible to solve electricity
Motor-car is energy consumption height and the problem of low tension battery power shortage when drive mode, can extend while reducing car load energy consumption
The service life of low tension battery.
Fig. 3 is the flow process of the low tension battery charge control method of electric vehicle according to another embodiment of the invention
Figure, as it is shown on figure 3, above-mentioned charge control method also includes:
S4, if electric vehicle is in drive mode, then entire car controller obtains the information about power of low tension battery in real time.
S5, when the electricity of low tension battery is less than charging lower threshold, vehicle control unit controls power supply changeover device starts
Be converted to low tension such as 12V with high-tension electricity such as 380V high voltage power supply exported, think that low tension battery charges.In driving
Time, high voltage power supply such as electrokinetic cell is in High voltage output, if the electricity of low tension battery is less than charging lower threshold, then may be used
With control DC/DC transducer, the output high-tension electricity of electrokinetic cell is converted to the low tension needed for low tension battery, right to realize
The charging of low tension battery, such that it is able to reduce the risk of low tension battery power shortage when driving, extends making of low tension battery
Use the life-span.
Further, when the electricity of low tension battery reaches charging upper limit threshold value, vehicle control unit controls Power convert
Device stops charging for low tension battery.
Fig. 4 is the low tension battery charging when drive mode of the electric vehicle of another specific embodiment according to the present invention
The flow chart controlled, as shown in Figure 4, this charging control process specifically includes:
S210, electric vehicle high pressure powers on and is in drive mode, the voltage of entire car controller VCU monitoring low tension battery.
S220, it is judged that whether low tension battery voltage is less than charging lower threshold, if it is, enter step S230, no
Then return step S210.
S230, the high-tension electricity that electrokinetic cell exports is converted to low tension and thinks low tension battery by control DC/DC transducer
Charging.
S240, it is judged that whether the voltage of low tension battery reaches charging upper limit threshold value, if yes then enter step S250, no
Then return step S230.
S250, controls DC/DC transducer and stops charging for low tension battery.
In sum, the low tension battery charge control method of the electric vehicle of the embodiment of the present invention, can reduce electronic
The vehicle power shortage risk of low tension battery when car-parking model is especially when shelving for a long time and in driving, extends low pressure electric power storage
In the service life in pond, method is simple, easily implements, and safety is high.
The electric vehicle that embodiment proposes according to a further aspect of the invention is described with reference to the accompanying drawings.
Fig. 5 is the block diagram of electric vehicle according to an embodiment of the invention, as it is shown in figure 5, this electric vehicle 100 wraps
Include high voltage power supply 10, low tension battery 20, coulometric detector 30, power supply changeover device 40 and entire car controller 50.
Wherein, high voltage power supply 10, such as electrokinetic cell, drive power for providing for electric vehicle 100；Low tension battery
20 provide power supply for the low-voltage electrical appliance for electric vehicle 100；Coulometric detector 30 is for detecting the electricity of low tension battery 20
Amount；Power supply changeover device 40 is connected with high voltage power supply 10 and low tension battery 20 respectively；Entire car controller 50 detects electric vehicle 100
Current operational mode, wherein, operational mode includes drive mode and car-parking model, is in car-parking model at electric vehicle 100
Time and after high voltage power supply 10 stops High voltage output, entire car controller 50 every Preset Time obtain low tension battery 20 electricity
Amount information, and when the electricity of low tension battery 20 is less than charging lower threshold, controls power supply changeover device 40 and start with by high pressure
Electricity such as 380V is converted to low tension such as 12V, thinks that low tension battery 20 charges.
The electric vehicle 100 of the embodiment of the present invention, after being in car-parking model and high voltage power supply 10 stops High voltage output,
Entire car controller 50 obtains the information about power of low tension battery 20 every Preset Time, and when the electricity of low tension battery 20 is less than
During charging lower threshold, control power supply changeover device 40 startup and think that low tension battery 20 charges, thereby may be ensured that electric vehicle
100, in the especially low tension battery 20 electricity abundance when shelving for a long time of stopping, reduce and the risk of power shortage occur just to affect vehicle
Often work, and ensure the service life of low tension battery 20.
As shown in Figure 6, electric vehicle 100 also includes that timer 60, entire car controller 50 are in parking at electric vehicle 100
Pattern and after high voltage power supply 10 stops High voltage output, sends riming instructions to timer 60 so that timer 60 starts meter
Time, and entire car controller 50 enters resting state, and when the timing time of timer 60 reaches Preset Time, entire car controller
50 instructions that wake up up receiving timer 60, and control high voltage power supply 10 exports and obtains low tension battery 20 after being woken
Information about power.
Specifically, timer 60 includes that data acquisition unit DAU, data acquisition unit DAU have time clock feature and can
To send wake-up signal to entire car controller 50.
Wherein, when the electricity of low tension battery 20 is less than charging lower threshold, entire car controller 50 can control power supply
Transducer 40 starts the high-tension electricity that high voltage power supply 10 exports is converted to low tension, or, entire car controller 50 controls power supply
Transducer 40 starts the high-tension electricity of external power supply is converted to low tension, thinks that low tension battery 20 charges.
Further, entire car controller 50 is additionally operable to when the electricity of low tension battery 20 reaches charging upper limit threshold value, control
Power supply changeover device 40 processed stops charging and control high voltage power supply 10 for low tension battery 20 and stops output, and entire car controller 50
Enter resting state.
It addition, the electric vehicle 100 of the embodiment of the present invention can also realize the charging to low tension battery 20 when driving
Control, to reduce the power shortage risk of low tension battery 20.Specifically, entire car controller 50 is in driving mould at electric vehicle 100
During formula, obtain the information about power of low tension battery 20 in real time, and when the electricity of low tension battery 20 is less than charging lower threshold,
Control power supply changeover device 40 to start the high-tension electricity that high voltage power supply 10 exports is converted to low tension, think that low tension battery 20 fills
Electricity.When driving, high voltage power supply 10 such as electrokinetic cell is in High voltage output, if the electricity of low tension battery 20 is less than charging
Lower threshold, then can control DC/DC transducer by the output of electrokinetic cell needed for high-tension electricity is converted to low tension battery 20
Low tension, to realize the charging to low tension battery 20, such that it is able to reduce the risk of low tension battery 20 power shortage when driving,
Extend the service life of low tension battery 20.
Further, entire car controller 50, when the electricity of low tension battery 20 reaches charging upper limit threshold value, controls power supply
Transducer 40 stops charging for low tension battery 20.
In sum, the electric vehicle 100 of the embodiment of the present invention, at car-parking model especially when shelving for a long time and be expert at
The charging to low tension battery 20 can be realized during car control, reduce the power shortage risk of low tension battery 20, extend low pressure electric power storage
In the service life in pond 20, low cost, safety is high.
It should be noted that in the description of this specification, any mistake described otherwise above in flow chart or at this
Journey or method describe and are construed as, and represent and include that one or more is for the step realizing specific logical function or process
The module of code, fragment or the part of executable instruction, and the scope of the preferred embodiment of the present invention includes other
Realize, wherein can not by order that is shown or that discuss, including according to involved function by basic mode simultaneously or by
Contrary order, performs function, and this should be understood by embodiments of the invention person of ordinary skill in the field.
Represent in flow charts or the logic described otherwise above at this and/or step, for example, it is possible to be considered as to use
In the sequencing list of the executable instruction realizing logic function, may be embodied in any computer-readable medium, for
Instruction execution system, device or equipment (system such as computer based system, including processor or other can hold from instruction
Row system, device or equipment instruction fetch also perform the system instructed) use, or combine these instruction execution systems, device or set
Standby and use.For the purpose of this specification, " computer-readable medium " can be any can to comprise, store, communicate, propagate or pass
Defeated program is for instruction execution system, device or equipment or combines these instruction execution systems, device or equipment and the dress that uses
Put.The more specifically example (non-exhaustive list) of computer-readable medium includes following: have the electricity of one or more wiring
Connecting portion (electronic installation), portable computer diskette box (magnetic device), random access memory (RAM), read only memory
(ROM), erasable read only memory (EPROM or flash memory), the fiber device edited, and portable optic disk is read-only deposits
Reservoir (CDROM).It addition, computer-readable medium can even is that and can print the paper of described program thereon or other are suitable
Medium, because then can carry out editing, interpreting or if desired with it such as by paper or other media are carried out optical scanning
His suitable method is processed to electronically obtain described program, is then stored in computer storage.
Should be appreciated that each several part of the present invention can realize by hardware, software, firmware or combinations thereof.Above-mentioned
In embodiment, the software that multiple steps or method in memory and can be performed by suitable instruction execution system with storage
Or firmware realizes.Such as, if realized with hardware, with the most the same, available well known in the art under
Any one or their combination in row technology realize: have the logic gates for data signal realizes logic function
Discrete logic, there is the special IC of suitable combination logic gate circuit, programmable gate array (PGA), on-the-spot
Programmable gate array (FPGA) etc..
Those skilled in the art are appreciated that and realize all or part of step that above-described embodiment method is carried
Suddenly the program that can be by completes to instruct relevant hardware, and described program can be stored in a kind of computer-readable storage medium
In matter, this program upon execution, including one or a combination set of the step of embodiment of the method.
In the description of this specification, reference term " embodiment ", " some embodiments ", " example ", " specifically show
Example " or the description of " some examples " etc. means to combine this embodiment or example describes specific features, structure, material or spy
Point is contained at least one embodiment or the example of the present invention.In this manual, to the schematic representation of above-mentioned term not
Identical embodiment or example must be directed to.And, the specific features of description, structure, material or feature can be in office
One or more embodiments or example combine in an appropriate manner.Additionally, in the case of the most conflicting, the skill of this area
The feature of the different embodiments described in this specification or example and different embodiment or example can be tied by art personnel
Close and combination.
Although above it has been shown and described that embodiments of the invention, it is to be understood that above-described embodiment is example
Property, it is impossible to being interpreted as limitation of the present invention, those of ordinary skill in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, revises, replaces and modification.
Claims (14)
1. the low tension battery charge control method of an electric vehicle, it is characterised in that described electric vehicle includes high-tension electricity
Source, low tension battery and power supply changeover device, described power supply changeover device respectively with described high voltage power supply and described low tension battery phase
Even, described charge control method comprises the following steps:
The entire car controller of described electric vehicle detects the operational mode that electric vehicle is current, and wherein, described operational mode includes
Drive mode and car-parking model；
If described electric vehicle is in described car-parking model, then after described high voltage power supply stops High voltage output, described whole
Vehicle controller obtains the information about power of described low tension battery every Preset Time；
When the electricity of described low tension battery is less than charging lower threshold, power supply changeover device described in described vehicle control unit controls
Start so that high-tension electricity is converted to low tension, think that described low tension battery charges.
2. the low tension battery charge control method of electric vehicle as claimed in claim 1, it is characterised in that described electric motor car
Also include timer, if described electric vehicle is in described car-parking model, then stop High voltage output in described high voltage power supply
Afterwards, described entire car controller obtains the information about power of described low tension battery every Preset Time, farther includes:
If described electric vehicle is in described car-parking model, then after described high voltage power supply stops High voltage output, described whole
Vehicle controller sends riming instructions to described timer so that described timer initiation timing, and described entire car controller enters and stops
Dormancy state；And
When the timing time of described timer reaches described Preset Time, described entire car controller is receiving described timer
Wake up instruction up after be waken up, control described high voltage power supply and export and obtain the information about power of described low tension battery.
3. the low tension battery charge control method of electric vehicle as claimed in claim 2, it is characterised in that described timer
Including data acquisition unit DAU.
4. the low tension battery charge control method of electric vehicle as claimed in claim 2, it is characterised in that when described low pressure
When the electricity of accumulator is less than charging lower threshold, power supply changeover device described in described vehicle control unit controls starts with by high-tension electricity
Be converted to low tension, think that described low tension battery charges, farther include:
When the electricity of described low tension battery is less than described charging lower threshold, power supply described in described vehicle control unit controls turns
Parallel operation starts so that the high-tension electricity that described high voltage power supply exports is converted to low tension, thinks that described low tension battery charges；Or,
When the electricity of described low tension battery is less than described charging lower threshold, power supply described in described vehicle control unit controls turns
Parallel operation starts so that the high-tension electricity of external power supply is converted to low tension, thinks that described low tension battery charges.
5. the low tension battery charge control method of electric vehicle as claimed in claim 4, it is characterised in that also include:
When the electricity of described low tension battery reaches charging upper limit threshold value, power supply changeover device described in described vehicle control unit controls
Stop charging and control described high voltage power supply for described low tension battery and stop output；And
Described entire car controller enters resting state.
6. the low tension battery charge control method of electric vehicle as claimed in claim 1, it is characterised in that also include:
If described electric vehicle is in described drive mode, the most described entire car controller obtains described low tension battery in real time
Information about power；And
When the electricity of described low tension battery is less than described charging lower threshold, power supply described in described vehicle control unit controls turns
Parallel operation starts so that the high-tension electricity that described high voltage power supply exports is converted to low tension, thinks that described low tension battery charges.
7. the low tension battery charge control method of electric vehicle as claimed in claim 6, it is characterised in that also include:
When the electricity of described low tension battery reaches charging upper limit threshold value, power supply changeover device described in described vehicle control unit controls
Stop charging for described low tension battery.
8. an electric vehicle, it is characterised in that including:
High voltage power supply, drives power for providing for electric vehicle；
Low tension battery, provides power supply for the low-voltage electrical appliance for described electric vehicle；
Coulometric detector, for detecting the electricity of described low tension battery；
Power supply changeover device, described power supply changeover device is connected with described high voltage power supply and described low tension battery respectively；
Entire car controller, the operational mode that described entire car controller detection electric vehicle is current, wherein, described operational mode includes
Drive mode and car-parking model, when described electric vehicle is in car-parking model and described high voltage power supply stop High voltage output it
After, described entire car controller obtains the information about power of described low tension battery every Preset Time, and at described low tension battery
Electricity less than charging lower threshold time, control described power supply changeover device start so that high-tension electricity is converted to low tension, think institute
State low tension battery charging.
9. electric vehicle as claimed in claim 8, it is characterised in that described electric vehicle also includes:
Timer, described entire car controller is in described car-parking model at described electric vehicle and stops height in described high voltage power supply
After pressure output, send riming instructions to described timer so that described timer initiation timing, and described entire car controller enters
Enter resting state, and when the timing time of described timer reaches described Preset Time, described entire car controller receives described
Timer wake up instruction up, and control the output of described high voltage power supply after being woken and obtain the electricity of described low tension battery
Amount information.
10. electric vehicle as claimed in claim 9, it is characterised in that described timer includes data acquisition unit ADU.
11. electric vehicles as claimed in claim 9, it is characterised in that wherein, power supply described in described vehicle control unit controls turns
Parallel operation starts so that the high-tension electricity that described high voltage power supply exports is converted to low tension, or, described in described vehicle control unit controls
Power supply changeover device starts so that the high-tension electricity of external power supply is converted to low tension, thinks that described low tension battery charges.
12. electric vehicles as claimed in claim 11, it is characterised in that described entire car controller is additionally operable to store in described low pressure
When the electricity of battery reaches charging upper limit threshold value, control described power supply changeover device and stop charging for described low tension battery and controlling
Described high voltage power supply stops output, and described entire car controller enters resting state.
13. electric vehicles as claimed in claim 8, it is characterised in that described entire car controller is additionally operable in described electric motor car
When being in drive mode, obtain the information about power of described low tension battery in real time, and low at the electricity of described low tension battery
When described charging lower threshold, control described power supply changeover device and start so that the high-tension electricity that described high voltage power supply exports is converted to
Low tension, thinks that described low tension battery charges.
14. electric vehicles as claimed in claim 13, it is characterised in that described entire car controller is additionally operable to store in described low pressure
When the electricity of battery reaches charging upper limit threshold value, control described power supply changeover device and stop charging for described low tension battery.
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| CN201610515448.6A CN106080239A (en) | 2016-07-01 | 2016-07-01 | The low tension battery charge control method of electric vehicle and electric vehicle |
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| CN201610515448.6A CN106080239A (en) | 2016-07-01 | 2016-07-01 | The low tension battery charge control method of electric vehicle and electric vehicle |
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