CN105416069B - A kind of power supply for electric car - Google Patents
A kind of power supply for electric car Download PDFInfo
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- CN105416069B CN105416069B CN201510743729.2A CN201510743729A CN105416069B CN 105416069 B CN105416069 B CN 105416069B CN 201510743729 A CN201510743729 A CN 201510743729A CN 105416069 B CN105416069 B CN 105416069B
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- power
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- power supply
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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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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
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- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
The invention provides a kind of power supply for electric car, including high-tension battery and DC converter, the DC converter includes power input positive terminal, power input negative pole end and the enable signal end for starting DC converter, the positive terminal of the high-tension battery electrically connects the power input positive terminal, the negative pole end of the high-tension battery electrically connects the power input negative pole end, provided with startup control relay between the positive terminal of the high-tension battery and the enable signal end, wherein, the DC converter includes DC converting module, equipment power supply output end and normality power output end, the normality power output end still can provide electric power in the case of the DC converting module is idle for normal electric equipment.
Description
Technical field
The present invention relates to automobile power source control field, more particularly to a kind of power supply of electric car.
Background technology
Electric car is the complication system of multisystem composition, on pure electric vehicle, due to that need not start motor, the theory
It is upper not need 12V batteries.But it is due to that under dead ship condition, starting switch, burglar alarm of vehicle etc. are needed remain for
One standing 12V power supply is powered, to start other low voltage equipments on DC-DC DC converters and car.
For this demand, common solution has two kinds on pure electric vehicle.One of which scheme as shown in figure 1,
DC-DC DC converters often connect main battery, and it is output as normal electric equipment and powered, and such as starting switch, other low-voltage equipments pass through
The Control of starting switch.But the program is when electric car is parked, DC-DC DC converters still continuous firing is deposited
Potential safety hazard and continue consume high-tension battery electricity.
Second scheme is as shown in Fig. 2 the high input voltage of DC-DC DC converters is by starting switch control, its output end
A battery is connect as the standing power supply of starting switch.Due to the presence of battery, DC-DC direct currents can be allowed during storing cycle
Converter is stopped, but needs to be managed the charging process of battery, otherwise there is potential safety hazard, therefore practical application
Circuit can be more complicated than circuit diagram in Fig. 2, simultaneously because adding battery, wire harness is installed etc. also can mutually strain it is multiple
It is miscellaneous.
The content of the invention
The technical problems to be solved by the invention are to provide one kind and possess energy-storage function, can be simultaneously with DC converting
The electric car startup power supply that electric car provides the standing power supply required for starting and at utmost reduction high-tension battery is consumed.
In order to solve the above technical problems, a kind of power supply for electric car of the invention, including high-tension battery and direct current become
Parallel operation, the DC converter includes power input positive terminal, power input negative pole end and for starting DC converter
Signal end is enabled, the positive terminal of the high-tension battery electrically connects the power input positive terminal, the negative pole end of the high-tension battery
The power input negative pole end is electrically connected, provided with startup control between the positive terminal of the high-tension battery and the enable signal end
Relay, wherein, the DC converter includes DC converting module, equipment power supply output end and the output of normality power supply
End, the normality power output end still can provide electricity in the case of the DC converting module is idle for normal electric equipment
Power.
It is preferred that, the DC converter is built-in provided with energy storage device and for controlling the energy storage device supplement energy
The built-in relay in source, the energy storage device provides electricity in the case of the DC converting module is idle for normal electric equipment
Power.
It is preferred that, the input of the DC converting module corresponds to the power input positive pole of the DC converter respectively
End, power input positive terminal and enable signal end, the output end of the DC converting module connect the equipment power supply
Output end, the output end of the DC converting module passes through the diode D1 connections normality power output end, the diode
D1 anode connects the output end of the DC converting module, and the negative electrode of the diode D1 electrically connects the normality power supply output
End, the energy storage device is connected across between the normality power output end and vehicle body ground terminal, the coil-end of the built-in relay
It is connected across between the normality power output end and vehicle body ground terminal, the tip side of the built-in relay connects the power input
Between positive terminal and enable signal end.
It is preferred that, the movable contact of the built-in relay connects the power input positive terminal, the built-in relay
Normally closed stationary contact connects the enable signal end.
It is preferred that, resistance R1 is provided between the negative electrode of the diode D1 and the normality power output end.
It is preferred that, it is additionally provided with voltage detecting list between the coil-end and the normality power output end of the built-in relay
Member.
It is preferred that, energy storage device is electric capacity C1.
It is preferred that, the electric capacity C1 is super capacitor.
It is preferred that, the movable contact for starting control relay connects the positive terminal of high-tension battery, startup control after
The normally opened stationary contact of electrical equipment connects the enable signal end.
A kind of method of supplying power to of electric car, including power supply, the power supply include high-tension battery and DC converting
Device, the DC converter includes DC converting module, equipment power supply output end and normality power output end, wherein,
The built-in built-in relay provided with energy storage device and for controlling the energy storage device to supplement the energy of the DC converter,
The energy storage device provides electric power in the case of the DC converting module is idle for normal electric equipment.
It is preferred that, the power supply of the electric car comprises the following steps：
A. after power supply is assembled on electric car, with the work of DC converting module, energy storage device is started to charge up directly
To full state；
B. during electric car traveling, igniter closure, the work of DC converting module, and set for the normal electricity of electric car
It is standby that electric power is provided；Meanwhile, if it is that energy storage device charges to full power state that energy storage device electric power, which is discontented with nature,；
C. when electric car is out of service, igniter open circuit, DC converting module from service is car by energy storage device
Necessary normal electric equipment provides electric power, until energy storage device power shortage；During energy storage device power shortage, built-in relay closure starts
DC converting module works, and is charged for energy storage device and provides electric power for normal electric equipment, until energy storage device is full of, built-in relay
Device disconnects, and it is that normal electric equipment is powered to continue by energy storage device；
D. restart after electric car is out of service, directly provide electric power by DC converting module for normal electric equipment.
By, as energy storage device, solving the power supply of electric car normality equipment in DC-DC DC converters built-in capacitance
Problem so that without working always when DC-DC DC converters are not used in storing cycle.By setting built-in relay to be controlled
The system supplement energy, it is to avoid DC-DC long-term works, so as to avoid the loss of high-tension battery.The charge and discharge cycles of super capacitor
Number of times has great raising than plumbic acid or lithium battery, while the problem of Charge Management is not present, is effectively improved reliability.
Brief description of the drawings
The present invention is described in further detail with reference to the accompanying drawings and detailed description：
Fig. 1 is to be used for a kind of circuit theory schematic diagram for power source design that electric car starts in the prior art；
Fig. 2 is to be used for the circuit theory schematic diagram for another power source design that electric car starts in the prior art；
Fig. 3 is circuit theory schematic diagram of the present invention for the embodiment 1 of the power supply of electric car；
Fig. 4 is circuit theory schematic diagram of the present invention for the embodiment 2 of the power supply of electric car.
Embodiment
Embodiment 1：
As shown in figure 3, a kind of power supply for electric car of the invention, including high-tension battery V and DC converter DC-DC
Assembly, the DC converter includes power input positive terminal 1, power input negative pole end 3 and become for starting direct current
The enable signal end 2 of parallel operation, the positive terminal of the high-tension battery v electrically connects the power input positive terminal 1, the high-tension battery
Negative pole end electrically connect the power input negative pole end 3, set between the positive terminal of the high-tension battery and the enable signal end 2
There is startup control relay K1, wherein, the DC converter DC-DC assembly include DC converting module DC-DC
Convertor, equipment power supply output end 4 and normality power output end 5, the normality power output end 5 is described straight
Still electric power can be provided in the case of stream conversion module DC-DC convertor are idle for normal electric equipment.
The DC converter DC-DC assembly are built-in provided with energy storage device and for controlling the energy storage device
The built-in relay K2 of the energy is supplemented, the energy storage device is normal electric equipment in the case of the DC converting module is idle
Electric power is provided, in the present embodiment, the energy storage device is electric capacity C1.The electric capacity C1 is super capacitor, and service life is improved
To with vehicle service life is same or higher and no battery capacity decays the problem of.
The input of the DC converting module DC-DC convertor corresponds to the DC converter DC-DC respectively
Assembly power input positive terminal, power input positive terminal and enable signal end, the DC converting module DC-DC
Convertor output end connects the equipment power supply output end 4, the DC converting module DC-DC convertor
Output end pass through the diode D1 connections normality power output end 5, the anode of the diode D1 connects the direct current change
Block DC-DC convertor output end is changed the mold, the negative electrode of the diode D1 electrically connects the normality power output end 5, institute
State electric capacity C1 to be connected across between the normality power output end 5 and vehicle body ground terminal 6, the coil-end bridging of the built-in relay K2
Between the normality power output end 5 and vehicle body ground terminal 6, the tip side of the built-in relay K2 connects the power input
2 between positive terminal 1 and enable signal end.The movable contact of the built-in relay K2 connects the power input positive terminal 1, described
Built-in relay K2 normally closed stationary contact end connects the enable signal end.
In the present embodiment, resistance R1 is provided between the negative electrode of the diode D1 and the normality power output end 5.
Its operation principle：As shown in figure 5, after 1. new machines are assembled on car, with DC-DC Convertor work, storage
Energy device is started to charge up until full state；2. when in vehicle travel process, igniter is closed, DC-DC Convertor works
Make, and electric power is provided for the 12V equipment of vehicle.Meanwhile, if it is that energy storage device is charged to completely that energy storage device electric power, which is discontented with nature,
Electricity condition；It is car by energy storage device 3. when vehicle is out of service, igniter open circuit, DC-DC Convertor are stopped
Necessary 12V equipment provides electric power, until energy storage device power shortage；During energy storage device power shortage, built-in relay closure starts
DC-DC Convertor work, and charges for energy storage device and provide electric power for 12V equipment, are full of up to energy storage device, it is built-in after
Electrical equipment disconnects, and it is that 12V equipment is powered to continue by energy storage device；Restart after 4. vehicle is out of service, directly by DC-DC
Convertor provides electric power for 12V equipment.
In in the present embodiment, i.e., DC converter DC-DC assembly normality power output end 5 is opening for vehicle
Dynamic switch, alarm etc. provide normality power supply.
Electric car starting state：Now DC converter DC-DC assembly enable signal end 2 is by high-tension control
System, DC converting module DC-DC Convertor are in running order, and DC converter DC-DC assembly equipment is powered
Power output end 4 provides electric power for 12V equipment, and voltage is Vout；If electric capacity C1 voltage is less than Vout-0.7v, direct current
Conversion module DC-DC Convertor carry out charging to Vc1=Vout-0.7v by diode D1 and resistance R1 to electric capacity C1.
Now, whether no matter built-in relay K2, which work, does not affect vehicle and powers.
Electric car parked state：The working condition of DC converter DC-DC assembly normality power output end 5 takes
Certainly in built-in relay K2 pick-up voltage Vc and release voltage Vo.
When electric capacity C1 is fully charged, electric capacity C1 both end voltages Vc1 >=Vo, built-in relay K2 adhesives, DC converting module
DC-DC convertor are in off position, and electric capacity C1 provides electric power by normality power output end 5 to normal electric equipment；
When electric capacity C1 electric quantity consumptions to Vc1<During Vo, built-in relay K2 releases, DC converting module DC-DC
Convertor enable signal end is connected to high-tension battery by built-in relay K2, so as to start working.DC converting module
DC-DC Convertor carry out charging to Vc1=Vc by diode D1 and resistance R1 to electric capacity C1, and built-in relay K2 inhales
Close, DC converting module DC-DC Convertor lose enable signal, be stopped until subsequent cycle or electric car start.
When electric car is parked, the 12v of equipment power supply output end 4 is loaded then by starting switch control, is not worked all the time.
Ensure that electric car has suitable startup power supply all the time in dead ship condition, again DC converting module need not have been allowed in running order.
Embodiment 2：
The difference of the present embodiment and above-described embodiment 1 is that the coil-end and the normality of the built-in relay K2 is electric
Voltage detection unit U1 is additionally provided between source output terminal 5.
The operation principle of the present embodiment：
DC converter DC-DC assembly normality power output end 5 carries for starting switch, alarm of vehicle etc.
For normality power supply.
Electric car starting state：Now DC converter DC-DC assembly enable signal end 2 is by high-tension control
System, DC converting module DC-DC Convertor are in running order, and DC converter DC-DC assembly equipment is powered
Power output end 4 provides electric power for 12V equipment, and voltage is Vout；If electric capacity C1 voltage is less than the minimum work electricity of setting
Vout-0.7v is pressed, then DC converting module DC-DC Convertor are charged by diode D1 and resistance R1 to electric capacity C1
To Vc1=Vout-0.7v.Now, whether no matter built-in relay K2, which work, does not affect vehicle and powers.
Electric car parked state：The working condition of DC converter DC-DC assembly normality power output end 5 takes
Certainly in built-in relay K2 adhesive whether.
Assuming that electric capacity C1 energy is not enough when voltage detection unit U1 voltage detecting end Vd voltages are Vdmin, it is electric during Vdmax
Work can be kept by holding C1.Vout-0.7v>Vdmax>Vdmin>The minimum operating voltage of voltage detection unit.
When electric capacity C1 is fully charged, electric capacity C1 both end voltages Vc1 >=Vdmin, voltage detection unit output low level is built-in
Relay K2 disconnects, and DC converting module DC-DC convertor are in off position, and electric capacity C1 is defeated by normality power supply
Go out end 5 and provide electric power to normal electric equipment；
When electric capacity C1 electric quantity consumptions to Vc1<During Vdmin, voltage detection unit output high level, built-in relay K2 is closed
Close, DC converting module DC-DC Convertor enable signal end is connected to high-tension battery by built-in relay K2, so that
Start working.DC converting module DC-DC Convertor carry out charging to Vc1 by diode D1 and resistance R1 to electric capacity C1
=Vdmax, voltage detection unit output low level, built-in relay K2 disconnects, and DC-DC Convertor lose enable signal,
It is stopped until subsequent cycle or vehicle launch.
When electric car is parked, the 12v of equipment power supply output end 4 is loaded then by starting switch control, is not worked all the time.
Ensure that electric car has suitable startup power supply all the time in dead ship condition, again DC converting module need not have been allowed in running order.
By, as energy storage device, solving the power supply of electric car normality equipment in DC-DC DC converters built-in capacitance
Problem so that without working always when DC-DC DC converters are not used in storing cycle.By setting built-in relay to be controlled
The system supplement energy, it is to avoid DC-DC long-term works, so as to avoid the loss of high-tension battery.The charge and discharge cycles of super capacitor
Number of times has great raising than plumbic acid or lithium battery, while the problem of Charge Management is not present, is effectively improved reliability.
It is emphasized that protection scope of the present invention is including but not limited to above-mentioned embodiment.It should be pointed out that pair
For those skilled in the art, under the premise without departing from the principles of the invention, several modifications and improvements can also be made, this
It should also be considered as belonging to protection scope of the present invention a bit.
Claims (7)
1. a kind of power supply for electric car, including high-tension battery and DC converter, it is defeated that the DC converter includes power supply
Enter positive terminal, power input negative pole end and the enable signal end for starting DC converter, the positive pole of the high-tension battery
The end electrical connection power input positive terminal, the negative pole end of the high-tension battery electrically connects the power input negative pole end, described
Provided with startup control relay between the positive terminal of high-tension battery and the enable signal end, it is characterised in that the direct current becomes
Parallel operation includes DC converting module, equipment power supply output end and normality power output end, the normality power output end
Still electric power can be provided in the case of the DC converting module is idle for normal electric equipment；Built in the DC converter
Provided with energy storage device and for controlling the energy storage device to supplement the built-in relay of the energy, the energy storage device is described
In the case of DC converting module is idle electric power is provided for normal electric equipment；The input of the DC converting module is corresponded to respectively
Power input positive terminal, power input positive terminal and the enable signal end of the DC converter, the DC converting module
Output end connect the equipment power supply output end, the output end of the DC converting module passes through diode D1 connections institute
Normality power output end is stated, the anode of the diode D1 connects the output end of the DC converting module, the diode D1
Negative electrode electrically connect the normality power output end, the energy storage device is connected across the normality power output end and vehicle body ground terminal
Between, the coil-end of the built-in relay is connected across between the normality power output end and vehicle body ground terminal, it is described it is built-in after
The tip side of electrical equipment is connected between the power input positive terminal and enable signal end.
2. the power supply according to claim 1 for electric car, it is characterised in that the movable contact of the built-in relay connects
The power input positive terminal is connect, the normally closed stationary contact of the built-in relay connects the enable signal end.
3. the power supply according to claim 1 for electric car, it is characterised in that the negative electrode of the diode D1 with it is described
Resistance R1 is provided between normality power output end.
4. the power supply according to claim 1 for electric car, it is characterised in that the coil-end of the built-in relay with
Voltage detection unit is additionally provided between the normality power output end.
5. the power supply according to claim 1 for electric car, it is characterised in that energy storage device is electric capacity C1, the electricity
Appearance C1 is super capacitor.
6. the power supply according to claim 1 for electric car, it is characterised in that the dynamic of the startup control relay touches
The positive terminal of point connection high-tension battery, the normally opened stationary contact of the startup control relay connects the enable signal end.
7. a kind of method of supplying power to of electric car, including power supply, the power supply include high-tension battery and DC converter,
The DC converter includes DC converting module, equipment power supply output end and normality power output end, and its feature exists
In the built-in built-in relay provided with energy storage device and for controlling the energy storage device to supplement the energy of the DC converter
Device, the energy storage device provides electric power in the case of the DC converting module is idle for normal electric equipment；The electric car
Power supply comprise the following steps：
A. after power supply is assembled on electric car, with the work of DC converting module, energy storage device is started to charge up until filling
Full state；
B. during electric car traveling, igniter closure, the work of DC converting module, and carried for the normal electric equipment of electric car
Power supply power；Meanwhile, if it is that energy storage device charges to full power state that energy storage device electric power, which is discontented with nature,；
C. when electric car is out of service, igniter open circuit, DC converting module from service is that vehicle must by energy storage device
The normal electric equipment wanted provides electric power, until energy storage device power shortage；During energy storage device power shortage, built-in relay closure starts direct current
Conversion module works, and is charged for energy storage device and provides electric power for normal electric equipment, until energy storage device is full of, built-in relay breaks
Open, it is that normal electric equipment is powered to continue by energy storage device；
D. restart after electric car is out of service, directly provide electric power by DC converting module for normal electric equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510743729.2A CN105416069B (en) | 2015-11-05 | 2015-11-05 | A kind of power supply for electric car |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510743729.2A CN105416069B (en) | 2015-11-05 | 2015-11-05 | A kind of power supply for electric car |
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| CN105416069A CN105416069A (en) | 2016-03-23 |
| CN105416069B true CN105416069B (en) | 2017-09-26 |
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| CN201510743729.2A Expired - Fee Related CN105416069B (en) | 2015-11-05 | 2015-11-05 | A kind of power supply for electric car |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI621552B (en) * | 2016-12-02 | 2018-04-21 | 姚立和 | Emergency start device for electric vehicle |
| CN107599854B (en) * | 2017-07-31 | 2020-12-18 | 福建省汽车工业集团云度新能源汽车股份有限公司 | Electric vehicle low-voltage battery management method and device |
| CN107757373A (en) * | 2017-09-20 | 2018-03-06 | 北京长城华冠汽车科技股份有限公司 | Automobile power system and electric automobile |
| CN107672546A (en) * | 2017-10-20 | 2018-02-09 | 厦门马恒达汽车零部件有限公司 | A kind of inverter controller assembly and control method with the input of high-low pressure dual power supply |
| CN109080473A (en) * | 2018-07-19 | 2018-12-25 | 奇瑞新能源汽车技术有限公司 | A kind of mobile monitoring device and its control method based on pure electric vehicle |
| CN113212167B (en) * | 2020-01-21 | 2023-02-28 | 上海汽车集团股份有限公司 | Relay closing auxiliary system and method |
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