CN108177548A - Accumulator of electric car power shortage self-charging system, charging method and electric vehicle - Google Patents
Accumulator of electric car power shortage self-charging system, charging method and electric vehicle Download PDFInfo
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- CN108177548A CN108177548A CN201810047203.4A CN201810047203A CN108177548A CN 108177548 A CN108177548 A CN 108177548A CN 201810047203 A CN201810047203 A CN 201810047203A CN 108177548 A CN108177548 A CN 108177548A
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- accumulator
- circuit
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Classifications
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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
- B60L1/00—Supplying electric power to auxiliary equipment of vehicles
-
- 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
-
- 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
-
- 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
- Y02T10/72—Electric energy management in electromobility
-
- 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
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/16—Information or communication technologies improving the operation of electric vehicles
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
Present invention is disclosed accumulator of electric car power shortage self-charging system, charging method and electric vehicles, wherein charging system includes the charging trigger circuit being connect with accumulator, the output terminal connection battery management system of the charging trigger circuit and DC/DC converters, it only makes the charging circuit on or off between the accumulator and power battery by detecting the voltage of the accumulator and sending control signal to the battery management system DC/DC converters after being compared with predeterminated voltage.Deft design of the present invention, it is simple in structure, the voltage of accumulator is detected by the trigger circuit that charges in real time and controls the break-make of switching circuit more afterwards with reference voltage, so as to which power battery be controlled to be charged or disconnected charging for accumulator, automatic process control system, it can effectively ensure that accumulator carries out the supplement of electricity in power shortage, avoid the problem that leading to not vehicle due to discharged or defective battery is serious can not start, and ensure that the validity that vehicle uses.
Description
Technical field
The present invention relates to electric vehicle field of power, especially accumulator of electric car power shortage self-charging system, fill
Method for electrically and electric vehicle.
Background technology
With the consumption of natural energy resources, the raising of environmental consciousness, thus using vehicle power supply as power source drive motor band
The electric vehicle of motor car wheel traveling, the advantages of because of its energy conservation and environmental protection, receives more and more attention.
The energy resource system of electric vehicle generally includes power battery, accumulator, DC/DC converters, battery management system
BMS, charging system etc., wherein voltage battery are when electric vehicle is not actuated, and the low voltage equipment internal as it is such as wide
Broadcast, the working power of cigar lighter, instrument lamp light system, whole-control system etc., for electric vehicle it is normal start play to
Close important role.
But in actual use, when electric vehicle static a period of time when not in use, due to days such as control devices
Normal electricity consumption consume, leads accumulator and power shortage situation occurs, and leads to the problem of and can not normally start electric vehicle, seriously affects
The normal use of vehicle.
Invention content
The purpose of the present invention is exactly to solve the above-mentioned problems in the prior art, provides accumulator of electric car and loses
Electric self-charging system, charging method and Rechargeable vehicle.
The purpose of the present invention is achieved through the following technical solutions：
Accumulator of electric car power shortage self-charging system, including the charging trigger circuit being connect with accumulator, the charging triggering
The output terminal connection battery management system and DC/DC converters of circuit, by detecting the voltage of the accumulator and with presetting
Voltage sends to the battery management system DC/DC converters after being compared and controls signal, only makes the accumulator and power
Charging circuit on or off between battery.
Preferably, the accumulator of electric car power shortage self-charging system, wherein the charging trigger circuit includes and storage
Battery connects and detects the emitter following circuit of its voltage, and the signal output end of the emitter following circuit meets the input terminal of comparison circuit, institute
State comparison circuit include precision voltage reference circuit, the input terminal of output terminal connecting valve circuit, the switching circuit
Output termination battery management system and DC/DC converters, and send control signal to them.
Preferably, the accumulator of electric car power shortage self-charging system, wherein：It is described to be put with transmit-receive radio road including operation
Big device, the anode of the positive input connection accumulator of the operational amplifier, reverse input end connect mould by first resistor
Intend ground, second resistance and the first capacitance have been arranged in parallel between reverse input end and output terminal, output terminal passes through third electricity
Resistance connects the input terminal of the comparison circuit.
Preferably, the accumulator of electric car power shortage self-charging system, wherein：The comparison circuit includes comparing
Device, the positive input of the comparator connect the 3rd resistor of the emitter following circuit and meet simulation ground, institute by adjustable resistance
The 6th resistance of concatenation between the positive input of comparator and output terminal is stated, the reverse input end of the comparator passes through the 4th electricity
Resistance connects precision voltage reference circuit, and connects simulation ground by the 5th resistance.
Preferably, the accumulator of electric car power shortage self-charging system, wherein：The precision voltage reference circuit
It including source of stable pressure and is connected thereto and in parallel pull-up resistor and pull down resistor, the base of the precision voltage reference circuit output
Quasi- voltage meets equation below：
REF=2.5×[1+( Ra /Rb)]
Wherein FER is the reference voltage of output, and Ra is the resistance value of pull-up resistor, and Rb is the resistance value of pull down resistor.
Preferably, the accumulator of electric car power shortage self-charging system, wherein：The value of the reference voltage is 5V.
Preferably, the accumulator of electric car power shortage self-charging system, wherein：The switching circuit includes optocoupler,
The reverse input end of the optocoupler connects the output terminal of the comparison circuit by diode, and the positive input of the optocoupler leads to
It crosses the 7th resistance and connects power end, the E poles of the optocoupler connect the grid of metal-oxide-semiconductor, and the C poles of the optocoupler meet MOS by the 8th resistance
The drain electrode of pipe, is serially connected with the tenth resistance and the second capacitance between the drain electrode of the metal-oxide-semiconductor and source electrode, the source electrode of the metal-oxide-semiconductor connects
Double open relays, double open relays connect the battery management system and DC/DC converters.
Preferably, the accumulator of electric car power shortage self-charging system, wherein：The ON shelves signals of the switching circuit
Signal wire branch point and the tie points of the firing circuit of electrical equipment that should be powered in ON grades of signals with other of the signal wire
Between invert be useful for cut-off ON grades of signals diode.
The charging method of accumulator of electric car power shortage self-charging system, includes the following steps：
S1, output voltage signal is to comparison circuit after emitter following circuit acquires battery tension processing in real time；
S2, comparison circuit exported after the voltage signal that S1 steps input is compared with preset reference voltage high level or low level to
Switching circuit；
S3, the switching circuit are connected when receiving low level, and make to the battery management system and the transmission of DC/DC converters
It can signal；When the switching circuit receives high level, stop sending to the battery management system and DC/DC converters enabled
Signal.
S4, the battery management system and DC/DC converters receive enable signal triggering, and power battery and accumulator is connected
Between charging circuit；Otherwise disconnect charging circuit.
Preferably, the accumulator of electric car power shortage self-charging method, wherein：
When the voltage of accumulator is less than 10.8V, the comparison circuit exports low level；
When the voltage of accumulator is higher than 13.8V, the comparison circuit exports high level.
Electric vehicle, including any of the above-described accumulator of electric car power shortage self-charging system.
The advantages of technical solution of the present invention, is mainly reflected in：
Deft design of the present invention, it is simple in structure, detect the voltage and and reference voltage of accumulator in real time by the trigger circuit that charges
The break-make of switching circuit is controlled more afterwards, and so as to which power battery be controlled to be charged or disconnected charging for accumulator, process is automatic
Change control, can effectively ensure that accumulator carries out the supplement of electricity in power shortage, avoid causing due to discharged or defective battery is serious
Can not vehicle the problem of can not starting, ensure that the validity that vehicle uses.
Circuit power consumption of this charging trigger circuit when without charging is small, can be ignored substantially, and circuit knot
Structure is controlled relative to software, fast response time, and precision is high.
By the preferred of the voltage to charging and disconnecting charging, it can effectively ensure that accumulator meets normal start of vehicle and wants
Ask and realize that automatic disconnect is charged, wide chargeable range, one can increase the charging time as far as possible, second is that subtracting as far as possible
The actuation number of few relay extends the service life of relay.
Using precision voltage reference, the accuracy of control signal output can effectively ensure that, ensure the essence of charge control
Degree and validity.
ON grades of signals are ended by the diode inverted, it should when ON grades of signals being avoided to be transmitted to other ON grades of signal
The electrical equipment circuit of power supply, the equipment that enabling to other should be powered in ON states are not powered, and are conducive to reduce accumulator
Energy loss.
Description of the drawings
Fig. 1 is the self-charging system schematic diagram of the present invention；
Fig. 2 is the charging trigger circuit figure of the present invention.
Specific embodiment
The purpose of the present invention, advantage and feature, will by the non-limitative illustration of preferred embodiment below carry out diagram and
It explains.These embodiments are only the prominent examples using technical solution of the present invention, it is all take equivalent replacement or equivalent transformation and
The technical solution of formation, all falls within the scope of protection of present invention.
In the description of scheme, it should be noted that term " " center ", " on ", " under ", "left", "right", "front", "rear",
The orientation or position relationship of the instructions such as " vertical ", " level ", " interior ", " outer " be based on orientation shown in the drawings or position relationship,
It is for only for ease of description and simplifies description rather than instruction or imply that signified device or element must have specific side
Position, with specific azimuth configuration and operation, therefore be not considered as limiting the invention.In addition, term " first ", " the
Two ", " third " is only used for description purpose, and it is not intended that instruction or hint relative importance.
The accumulator of electric car power shortage self-charging system of the present invention is illustrated below in conjunction with the accompanying drawings, such as 1 institute of attached drawing
Show, including the accumulator 1 for being used to be powered, what the accumulator 1 should power when being connected to ACC grades of signals by ignition switch
Equipment（Source Music, cigar lighter etc.）And the electrical equipment that should be powered in ON grades of signals（In instrument, battery charging circuit
DC/DC converters etc.）So as to form ACC grades of firing circuits and ON grades of firing circuits, the accumulator 1 is also connected with charging triggering
Circuit 10, the charging trigger circuit 10 is connected to the ACC grades of firing circuit and ON grades of firing circuits, by described in detection
The voltage of accumulator 1 simultaneously sends out control signal after being compared with predeterminated voltage and only makes between the accumulator 1 and power battery 7
Charging circuit on or off, i.e., only make battery management system（BMS）5 and DC/DC converters 6 trigger work or stop work
Make.
As shown in attached drawing 1, attached drawing 2, the charging trigger circuit 10 includes connecting with accumulator 1 and detecting penetrating for its voltage
With circuit 2, the signal output end of the emitter following circuit 2 connects the input terminal of comparison circuit 3, and the comparison circuit 3 includes high-precision
Reference voltage circuit 31, the input terminal of output terminal connecting valve circuit 4, the output termination battery management of the switching circuit 4
System 5 and DC/DC converters 6, and control signal is sent so as to only make the charging between power battery 7 and accumulator 1 to them
Circuit turn-on or disconnection.
During work, ratio is conveyed to by the voltage condition with the real-time detection accumulator 1 of transmit-receive radio road 2 and after being amplified
Compared with circuit 3, after the voltage signal received and high-precision reference voltage are compared by the comparison circuit 3, high electricity is exported
Flat or low level to switching circuit 4 to control the on or off of switching circuit 4, when the switching circuit 4 is connected to described
Battery management system 5 sends enable signal（ACC grades of signals and ON grades of signals）, it is made to trigger work, meanwhile, the battery management
System 5 after the power is turned on, when receiving ON grades of signals, is attracted the main relay of the power battery 7, provides electric energy；In cell tube
While reason system 5 triggers, the switching circuit 4 also sends enable signal to the DC/DC converters 6（ON grades of signals）Make it
Work is triggered, so as to charge by 6 output voltage of DC/DC converters to accumulator 1.
Specifically, as shown in Figure 2, it is described to include operational amplifier U205A, the operational amplifier with transmit-receive radio road 2
U205A connects the indirect capacitance C2 of analog power anode and simulation ground, the analog power anode and simulation ground, the operation amplifier
The anode of the positive input connection accumulator 1 of device U205A, reverse input end meet simulation ground AGND by first resistor R1,
Second resistance R2 and the first capacitance C1 have been arranged in parallel between its reverse input end and output terminal to carry out low-pass filtering so as to reality
The overcurrent of existing signal, the input that the output terminal of the operational amplifier U205A passes through the 3rd resistor R3 connections comparison circuit 3
End.
As shown in Figure 2, the comparison circuit 3 includes comparator U205B, the positive input of the comparator U205B
It connects the 3rd resistor R3 of the emitter following circuit 2 and simulation ground, the forward direction of the comparator U205B is connect by adjustable resistance R12
The 6th resistance R6 is concatenated between input terminal and output terminal, the reverse input end of the comparator U205B is connect by the 5th resistance R5
Simulation ground, and the precision voltage reference circuit 31 is connect by the 4th resistance R4.
As shown in Figure 2, the precision voltage reference circuit 31 provides benchmark using controllable accurate source of stable pressure Q200
Voltage, REF pins connect analog power anode by resistance R9 and meet the resistance R4, and GND pin connects simulation ground, described
It is connected with capacitance C3 between REF pins and GND pin, output voltage can be by being connected thereto and pull-up resistor R10 in parallel
And pull down resistor R11 carries out arbitrary adjustment between 2.5V-36V, the exemplary dynamic impedance of the controllable accurate source of stable pressure is 0.2
Ω, Voltage Reference error is ± 0.4%, and its peripheral circuit is simple, and programmability is strong, and error is small, compares other devices, electricity
The reference voltage that stability is more preferable, and the precision voltage reference circuit 31 exports is pressed to meet equation below：
REF=2.5×[1+( Ra /Rb)]
Wherein FER is the reference voltage of output, and Ra is the resistance value of pull-up resistor R10, and Rb is the resistance value of pull down resistor R11.
Preferably, the resistance value of the pull-up resistor R10 and pull down resistor R11 is respectively 10K Ω, corresponding to obtain,
The value for the reference voltage that the precision voltage reference circuit 31 exports is 5V.
Further, as shown in Figure 2, the switching circuit 4 includes optocoupler U204, the reverse input end of the optocoupler U204
By the output terminal of the diode D206 connections comparison circuit 3, the positive input of the optocoupler U204 passes through the 7th resistance
The E poles that R7 meets power end VCC, the optocoupler U204 connect the grid of metal-oxide-semiconductor Q1, and the C poles of the optocoupler are connect by the 8th resistance R8
The drain electrode of metal-oxide-semiconductor Q1 is serially connected with the tenth resistance R137 and the second capacitance C3 between the drain electrode of the metal-oxide-semiconductor Q1 and source electrode, described
The source electrode of metal-oxide-semiconductor Q1 connects double open relays, and double open relays connect the battery management system（BMS）5 and DC/DC converters
6。
Such as attached drawing 1, shown in attached drawing 2, two signal output ends of double open relays generate ACC grades of signals and ON gear letters
Number, wherein, the signal wire of the ACC grades of signal and ON grades of signals is all connected to the battery management system（BMS）5, the ACC
The signal wire of shelves signal is also connected on the firing circuit of electrical equipment that should be powered in ACC grades of signals, that is, is connected to igniting
On circuit between switch and other electrical equipments that should be powered in ACC grades of signals；The signal wire connection of the ON grades of signal
To the DC/DC converters 6 and other firing circuits of electrical equipment that should be powered in ON grades of signals, i.e., in ignition switch and
Other are answered on the circuit between power supply unit.
Since when receiving ON grades of signals, full vehicle power supply can all open work, so that combination instrument etc. is at ON grades in automobile
When the electrical equipment that should power can all power on, this has resulted in a large amount of consumption of accumulator electric-quantity, therefore in the present invention, such as attached drawing
Shown in 1, the signal wire branch point 8 and the signal wire of the ON shelves signals of the switching circuit 4 should be in ON grades of signals with other
The diode D3 for being useful for ON grades of signals of cut-off is inverted between the tie point 9 of the firing circuit of the electrical equipment of electricity, by described
The ON shelves signal that diode D3 generates the switching circuit 4 ends, and ON grades of signals is avoided to enter other in ON grades of signals
The ignition circuit for the electrical equipment that should be powered, so as to which combination instrument be made not supplied when the equipment that should be powered in ON grades of signals
Electricity, and then realize the state that the charging circuit between power battery and accumulator is only made to have electricity to work.
During above-mentioned accumulator of electric car power shortage its work of self-charging system, include the following steps：
S1, output voltage signal gives the comparator U205B after the emitter following circuit 2 voltage processing of acquisition accumulator 1 in real time
Positive input.
S2, the preset reference that the voltage signal that the comparator U205B inputs S1 steps is received with its reverse input end
After voltage compares, input terminal generates high level or low level and exports to the primary of the optocoupler in the switching circuit.
S3 is connected when the switching circuit 4 receives low level, and is converted to the battery management system and DC/DC
Device sends enable signal；When the switching circuit receives high level, stop to the battery management system and DC/DC conversions
Device sends enable signal.
Specifically, when the voltage for detecting accumulator 1 is less than preset value, the forward end electricity of the comparator U205B
It forces down in reference voltage, at this point, the output terminal of the comparator U205B becomes low level from high level, the optocoupler at this time
The primary conducting of U204, and then the secondary conducting of optocoupler U204, at this point, 12V voltages trigger the MOS by U204 grade of optocoupler
Pipe Q1, charges the coil of double open relays after the metal-oxide-semiconductor Q1 conductings, after coil is powered, double open relays
Two pairs of normally opened contacts are closed, and a pair of contact generates ON grades of signals, and a pair of contact generates ACC grades of signals, thus to the battery
Management system 5, which sends out ON grades of signals and ACC grades of signals, makes it trigger work, while send ON grades of letters to the DC/DC converters 6
Number make its triggering.
With the progress of charging process, when the voltage for detecting the accumulator 1 reaches setting voltage, the ratio at this time
Output compared with device U205B is high level by low transition, at this point, optocoupler U204 is not achieved in the primary pressure difference of the optocoupler U204
Turn-on condition, and then the optocoupler U204 is turned off, then metal-oxide-semiconductor Q1 shutdown, the coil blackout of double open relays,
Two pairs of contacts of double open relays disconnect, and the ACC grades of signal and ON grades of signals disconnect.
S4, the battery management system 5 and DC/DC converters 6 receive enable signal triggering, that is, the battery management system
System 5 powers on triggering, and when receiving ON grades of signals after receiving ACC grades of signals, and the internal relay of the power battery 7 is inhaled
It closes, input voltage is provided for the DC/DC converters 6；Meanwhile the DC/DC converters 6 trigger after ON grades of signals are received
DC/DC outputs are controlled, at this time the charging circuit conducting between the power battery 7 and accumulator 1, power battery 7 is to accumulator 1
It charges；Conversely, the power-off of battery management system 5 is stopped, the internal relay of the power battery 7 disconnects, institute
It states the power-off of DC/DC converters 6 to be stopped, the charging circuit between the power battery 7 and accumulator 1 disconnects, and system is again
Into dormant state, restart until detecting that power shortage state occurs in accumulator next time.
During practical control, preferably when the voltage of accumulator is less than 10.8V, the output terminal of the comparator is turned by high level
Become exporting low level, optocoupler is connected at this time, exports two path control signal；When the voltage of accumulator reaches at or above 13.8V,
The comparison circuit exports high level, and optocoupler disconnects at this time, stops control signal output.
This is because, inventor has found by a large amount of experiment：After the voltage of accumulator 1 is less than 10.3V, keyed ignition
When, DC/DC charging systems can not work normally, it is necessary to and DC/DC charging systems could be started by carrying out sparking with other batteries, and
The minimum 10.5V of conventional discharge voltage of 12V accumulators, error caused by component etc. in consideration system, by the electricity of accumulator
Pressure is set in 10.8V, prevents brownout from causing DC/DC charging systems that can not start, does not realize automatic charging function.Together
When, the actual output voltage of vehicle-mounted DC/DC is 14V, and detection circuit must trigger shutdown signal before 14V is reached, otherwise
The effect being automatically closed is not achieved, equally error is taken into account, shutdown voltage is set as 13.8V.
This patent further discloses a kind of electric vehicle, including the accumulator of electric car power shortage self-charging system
System, the electric vehicle can be the electric vehicle of known various types, brand, and details are not described herein again.
Still there are many embodiment, all technical sides formed using equivalents or equivalent transformation by the present invention
Case is within the scope of the present invention.
Claims (10)
1. accumulator of electric car power shortage self-charging system, it is characterised in that：Including with accumulator（1）
The charging trigger circuit of connection（10）, the charging trigger circuit（10）Output terminal connection battery management system（5）With
DC/DC converters（6）, by detecting the accumulator（1）Voltage and be compared the backward battery with predeterminated voltage
Management system（5）With DC/DC converters（6）Control signal is sent, only makes the accumulator（1）And power battery（7）Between
Charging circuit on or off.
2. accumulator of electric car power shortage self-charging system according to claim 1, it is characterised in that：The charging triggering
Circuit（10）Including with the accumulator（1）Connect and detect the emitter following circuit of its voltage（2）, the emitter following circuit（2）Letter
Number output termination comparison circuit（3）Input terminal, the comparison circuit（3）Including precision voltage reference circuit（31）, it is defeated
Outlet connecting valve circuit（4）Input terminal, the switching circuit（4）Output terminate the battery management system（5）And DC/
DC converters（6）, and send control signal to them.
3. accumulator of electric car power shortage self-charging system according to claim 2, it is characterised in that：It is described with transmit-receive radio road
（2）Including operational amplifier（U205A）, the operational amplifier（U205A）Positive input connection accumulator（1）Just
Pole, reverse input end pass through first resistor（R1）Connect simulation ground（AGND）, between reverse input end and output terminal parallel connection set
It is equipped with second resistance（R2）With the first capacitance（C1）, output terminal passes through 3rd resistor（R3）Connect the comparison circuit（3）'s
Input terminal.
4. accumulator of electric car power shortage self-charging system according to claim 3, it is characterised in that：The comparison circuit
（3）Including comparator（U205B）, the comparator（U205B）Positive input connect the emitter following circuit（2）Third electricity
Resistance（R3）And pass through adjustable resistance（R12）Connect simulation ground, the comparator（U205B）Positive input and output terminal between go here and there
Connect the 6th resistance（R6）, the comparator（U205B）Reverse input end pass through the 4th resistance（R4）Connect precision voltage reference
Circuit（31）, and pass through the 5th resistance（R5）Connect simulation ground.
5. accumulator of electric car power shortage self-charging system according to claim 2, it is characterised in that：The high-precision base
Quasi- potential circuit（31）Including source of stable pressure（Q200）, by being connected thereto and pull-up resistor in parallel（R10）And pull down resistor
（R11）Adjust output voltage, the precision voltage reference circuit（31）The reference voltage of output meets equation below：
REF=2.5×[1+( Ra /Rb)]
Wherein FER is the reference voltage of output, and Ra is the resistance value of pull-up resistor, and Rb is the resistance value of pull down resistor.
6. accumulator of electric car power shortage self-charging system according to claim 2, it is characterised in that：The switching circuit
（4）Including optocoupler（U204）, the optocoupler（U204）Reverse input end pass through diode（D206）Connect the comparison circuit
（3）Output terminal, the optocoupler（U204）Positive input pass through the 7th resistance（R7）Connect power end（VCC）, the optocoupler
（U204）E poles connect metal-oxide-semiconductor（Q1）Grid, the C poles of the optocoupler pass through the 8th resistance（R8）Connect metal-oxide-semiconductor（Q1）Drain electrode,
The metal-oxide-semiconductor（Q1）Drain electrode and source electrode between be serially connected with the tenth resistance（R137）With the second capacitance（C3）, the metal-oxide-semiconductor（Q1）
Source electrode connect double open relays, double open relays connect the battery management system（5）With DC/DC converters（6）.
7. according to any accumulator of electric car power shortage self-charging systems of claim 2-6, it is characterised in that：It is described to open
Powered-down road（4）ON shelves signals signal wire branch point（8）And the electricity consumption that the signal wire should power with other in ON grades of signals
The tie point of the firing circuit of equipment（9）Between invert be useful for cut-off ON grades of signals diode（D3）.
8. according to the charging method of any accumulator of electric car power shortage self-charging systems of claim 1-7, feature
It is：Include the following steps：
S1, output voltage signal is to comparison circuit after emitter following circuit acquires battery tension processing in real time；
S2, comparison circuit exported after the voltage signal that S1 steps input is compared with preset reference voltage high level or low level to
Switching circuit；
S3, the switching circuit are connected when receiving low level, and make to the battery management system and the transmission of DC/DC converters
It can signal；When the switching circuit receives high level, stop sending to the battery management system and DC/DC converters enabled
Signal；
S4, the battery management system and DC/DC converters receive enable signal triggering, are connected between power battery and accumulator
Charging circuit；Otherwise disconnect charging circuit.
9. accumulator of electric car power shortage self-charging method according to claim 8, it is characterised in that：
When the voltage of accumulator is less than 10.8V, the comparison circuit exports low level；
When the voltage of accumulator is higher than 13.8V, the comparison circuit exports high level.
10. electric vehicle, it is characterised in that：Including any accumulator of electric car power shortage self-chargings of claim 1-7
System.
Priority Applications (1)
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Cited By (9)
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| CN108964181A (en) * | 2018-07-16 | 2018-12-07 | 东莞市德尔能新能源股份有限公司 | A kind of BMS charge control system that can be worked under low pressure power shortage state |
| CN109050255A (en) * | 2018-07-09 | 2018-12-21 | 安徽安凯汽车股份有限公司 | A kind of disconnected low pressure electric installation of electric motor coach intelligence |
| CN109353247A (en) * | 2018-11-23 | 2019-02-19 | 北斗航天汽车（北京）有限公司 | Forklift battery bag parameter display system |
| CN109372675A (en) * | 2018-12-29 | 2019-02-22 | 神驰机电股份有限公司 | EFI engine control system and method |
| CN109849671A (en) * | 2018-11-26 | 2019-06-07 | 深圳市麦澜创新科技有限公司 | It is a kind of applied to the battery management system of electric car, method and electric car |
| CN110329108A (en) * | 2019-07-08 | 2019-10-15 | 武汉格罗夫氢能汽车有限公司 | A kind of intelligent charging method preventing new energy vehicle low tension battery power shortage |
| CN111391663A (en) * | 2020-04-27 | 2020-07-10 | 成都明然智能科技有限公司 | Charging method, charging system and electric automobile |
| CN113113944A (en) * | 2021-02-26 | 2021-07-13 | 深圳市智城华业科技有限公司 | Charging circuit structure of charging pile |
| CN113103919A (en) * | 2021-05-24 | 2021-07-13 | 安徽安凯汽车股份有限公司 | Electric motor coach storage battery protection system and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109050255A (en) * | 2018-07-09 | 2018-12-21 | 安徽安凯汽车股份有限公司 | A kind of disconnected low pressure electric installation of electric motor coach intelligence |
| CN108964181A (en) * | 2018-07-16 | 2018-12-07 | 东莞市德尔能新能源股份有限公司 | A kind of BMS charge control system that can be worked under low pressure power shortage state |
| CN109353247A (en) * | 2018-11-23 | 2019-02-19 | 北斗航天汽车（北京）有限公司 | Forklift battery bag parameter display system |
| CN109353247B (en) * | 2018-11-23 | 2023-10-27 | 北斗航天汽车（北京）有限公司 | Fork truck battery package parameter display system |
| CN109849671A (en) * | 2018-11-26 | 2019-06-07 | 深圳市麦澜创新科技有限公司 | It is a kind of applied to the battery management system of electric car, method and electric car |
| CN109372675A (en) * | 2018-12-29 | 2019-02-22 | 神驰机电股份有限公司 | EFI engine control system and method |
| CN110329108A (en) * | 2019-07-08 | 2019-10-15 | 武汉格罗夫氢能汽车有限公司 | A kind of intelligent charging method preventing new energy vehicle low tension battery power shortage |
| CN111391663A (en) * | 2020-04-27 | 2020-07-10 | 成都明然智能科技有限公司 | Charging method, charging system and electric automobile |
| CN113113944A (en) * | 2021-02-26 | 2021-07-13 | 深圳市智城华业科技有限公司 | Charging circuit structure of charging pile |
| CN113113944B (en) * | 2021-02-26 | 2022-04-29 | 深圳市智城华业科技有限公司 | Charging circuit structure of charging pile |
| CN113103919A (en) * | 2021-05-24 | 2021-07-13 | 安徽安凯汽车股份有限公司 | Electric motor coach storage battery protection system and method |
| CN113103919B (en) * | 2021-05-24 | 2022-03-22 | 安徽安凯汽车股份有限公司 | Electric motor coach storage battery protection system and method |
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