CN108973758A - A kind of charging recognition methods of charging system for electric automobile and electric car charging circuit - Google Patents
A kind of charging recognition methods of charging system for electric automobile and electric car charging circuit Download PDFInfo
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- CN108973758A CN108973758A CN201811011259.0A CN201811011259A CN108973758A CN 108973758 A CN108973758 A CN 108973758A CN 201811011259 A CN201811011259 A CN 201811011259A CN 108973758 A CN108973758 A CN 108973758A
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Abstract
The invention discloses a kind of charging recognition methods of charging system for electric automobile, for electric vehicle charge interface access charging equipment when to interface voltage it is effective identify and secure connection, including detecting the first charging voltage of the power transformer at the charging interface when the charging interface of the electric car is electrically connected to charging equipment；Connection electric signal is detected to charging equipment by the vehicle mobile equipment of electric car；The second charging voltage of the power transformer is detected at the charging interface of the electric car；Measuring the alternating voltage that the charging equipment provides according to first charging voltage and the second charging voltage includes extra voltage；And according to the output impedance at the measurement movement change power transformer, wherein measurement movement includes: when ratio between first charging voltage and the second charging voltage is in a pre-set interval, determine provided by alternating voltage include extra voltage.
Description
Technical field
The embodiment of the present invention relates generally to electric car charging technique, in more specific words it, the embodiment of the present invention relates generally to
For judge electric automobile charging pile charging interface whether safe charging recognition methods and this identification circuit.
Background technique
Ev industry is one of the strategic emerging industries of state key development, and each area has had begun electronic
The construction of automobile charging distribution network, electric automobile charging station.The power supply that electric car mainly utilizes Vehicular accumulator cell group to provide
The direct current DC electric motor after exchange AC is driven to carry out supply vehicle driving dynamics, electric car drives type substantially according to its battery
On be divided into proprietary electric car and hybrid vehicle, proprietary electric car is driven by pure battery, is needed after battery drain
Battery charging is carried out, and hybrid vehicle can be provided by other power engines (such as gasoline, natural gas etc.)
Vehicle power, and can charge simultaneously for battery group in the process of moving, electric power storage is utilized after engine power exhausts
Pond group is energized.Hybrid-electric car can be divided into series system and parallel way, and wherein series system is to export from engine
Mechanical energy is converted into electric energy by generator, which is supplied to battery or motor, so that vehicle be made to drive always by motor
Dynamic, such automobile is that the concept that engine and generator is arranged is added on previous electric car in order to increase the range of driving；And
Connection mode can also make vehicle driving using battery supply, only can also drive vehicle with engine (gasoline or diesel oil), in parallel
Mode utilizes both power sources, and according to driving conditions, parallel way can make engine and motor while drive vehicle.
In general, with the continuous development and innovation of current automobile manufacture industry, the intelligence of automobile itself is had increased to
In one stage, vehicle-mounted user can be communicated and be interacted with vehicle CAN bus by way of car-mounted terminal, especially vehicle-mounted
It is provided with GPS navigation equipment in terminal, location information can be sent to the onboard servers terminal of distal end by way of positioning.
When electric car vehicle passes through cable connection to charging station, the electric power of Vehicular accumulator cell is obtained from charging pile.Together
When, user can also be charged by other cables or connecting line, and these cables are not usually charging electricity as defined in standard
Cable, so there may be risk, such as over-voltage, user's electric shocks or electric leakage etc. during the charging process.And these non-standard ways
Charging purpose primarily to improve charging rate, and increase the input of current or voltage, but due to certain cable matter
Amount is more inferior, and there are risk above-mentioned is larger, it is therefore desirable to which circuit and the identification side of this risk can be identified by designing one kind
Formula.
Summary of the invention
The purpose of technical solution of the present invention is to design a kind of charging recognition methods of charging system for electric automobile, in electricity
Electricity may determine that effective identification of interface voltage and secure connection, charging interface when electrical automobile charging interface accesses charging equipment
Whether cable is standard specification, can be by identifying the first, second charging voltage at charging interface come multilevel iudge.Another
On the one hand, it is to determine according to judging result by vehicle mobile equipment (such as vehicle intelligent terminal, user's handheld device etc.)
It is no to charge.This identification circuit is related generally in another embodiment, can increase the impedance on current path to drop
The voltage of low input, to maintain the stable state of charging.
Technical solution: the charging recognition methods of charging system for electric automobile, comprising: in the charging interface of the electric car
When being electrically connected to charging equipment, the first charging voltage of the power transformer at the charging interface is detected；Pass through electric car
Vehicle mobile equipment to charging equipment detect connection electric signal；The power supply is detected at the charging interface of the electric car
Second charging voltage of transformer；Measure what the charging equipment provided according to first charging voltage and the second charging voltage
Alternating voltage includes extra voltage；And the output impedance at the power transformer is changed according to measurement movement, wherein
The measurement movement includes: the ratio between first charging voltage and the second charging voltage is in a pre-set interval
When, determine that provided alternating voltage includes extra voltage.
In one embodiment, further comprise determine provided by alternating voltage include extra voltage when, pass through by
The power transformer is electrically connected to the pressure limiting circuit on electric car, to eliminate this part extra voltage.
In one embodiment, this part extra voltage being eliminated is decomposed into a vehicle-mounted energy storage device.Energy storage
Device may include super capacitor group or other battery packs, and the electric current for branching to this part gives electric car vehicle-mounted electricity relatively
The charging current in pond is smaller, this portion of electrical current is mainly the power supply of smaller current in supply vehicle.
It in one embodiment, further comprise cutting off institute when determining that provided alternating voltage includes extra voltage
The access of power transformer is stated, such as is provided with relay at charging interface, there are directly cut off when extra voltage in measurement
With the connecting path of charging pile.
In another embodiment, electric car charging circuit includes electric vehicle charge interface and with matching
Charging station charging equipment, wherein the charging interface of the electric car includes: for being converted to the alternating current of charging equipment
The power transformer of DC current；The vehicle mobile equipment being connect with the power transformer, for detecting the charging interface
The first charging voltage and the second charging voltage of the power transformer at place, according to first charging voltage and the second charging voltage
Measuring the alternating voltage that the charging equipment provides includes extra voltage；And the control circuit of the connection power transformer,
For changing the output impedance at the power transformer according to measurement movement.The charging equipment includes: power supply identification
Circuit is configured to respond to the connection electric signal from the charging interface；Connect the controller of the power supply identification circuit, quilt
It is configured to receive the data-signal from charging interface；The suppression circuit for connecting the controller, is configured to: responding the number
It is believed that number in indicate the data section signal of output impedance at the power transformer, lower and provided to the charging interface
Voltage；Or the access of cutting and the power transformer.
In one embodiment, further comprise the pressure limiting circuit being connect with the power transformer, be configured to true
The alternating voltage that the fixed charging equipment provides eliminates this part extra voltage when including extra voltage.
In one embodiment, further comprise the overvoltage crowbar being connect with the power transformer, be configured to
The voltage measured at the power transformer disconnects vehicle mobile equipment or Vehicular accumulator cell from charging when being greater than predeterminated voltage
Electric power is obtained at equipment.
In one embodiment, it is equipped with impedance control circuit between the power transformer and pressure limiting circuit, is matched
Work is under bypass condition when the alternating voltage for being set to the offer of the charging equipment described in undetermined includes extra voltage, as electric current
Access；And when measuring the alternating voltage that the charging equipment provides and including extra voltage, work is compared under high-impedance state, at this time
Inhibit one part of current access.
In one embodiment, it is sent out by vehicle mobile equipment, such as vehicle based computing system to charging pile at charging interface
After sending the identification code of charging equipment, the identification code of charging equipment to be received by a controller, information of vehicles is confirmed, is then carried out
Charging and electricity metering.
Power transformer can be used for providing operating voltage to vehicle, while charging interface can be used for receiving from charging pile hair
The data command sent.Pressure limiting circuit, which can be used for responding from charging pile, to be received data command and changes power transformer and charging pile dress
The impedance of electrical path between setting, and when drawing the electric current of preset threshold amount by the pressure limiting circuit, it reduces from described
Voltage of the charging pile charging equipment to the power transformer.
The property and advantage of embodiment for a more complete understanding of the present invention, should refer to it is next detailed description and it is attached
Figure.From the following drawings and detailed description, other aspects of the present invention, objects and advantages be will be evident.But, from claim
Description the scope of the present invention will sufficiently be illustrated.
Detailed description of the invention
Fig. 1 is the structural principle block diagram of electric car charging circuit.
Specific embodiment
Referring to Fig.1, electric car charging circuit includes electric vehicle charge interface 1 and is filled therewith by what cable was connected
Power station charging equipment 2 (such as charging pile), the charging interface 1 of the electric car include the AC friendship for self-charging stake in future 2
Galvanic electricity, which circulates, is changed to the power transformer 11 of DC DC current；The vehicle mobile equipment 12 being connect with the power transformer 11,
For detecting the first charging voltage and the second charging voltage of the power transformer 11 at the charging interface, according to described first
Charging voltage and the second charging voltage measure whether the alternating voltage that the charging pile 2 provides includes extra voltage；And connection
The impedance control circuit 13 of the power transformer 11, for being changed at the power transformer 11 according to measurement movement
Output impedance.
In one embodiment, further comprise the pressure limiting circuit 15 being connect with the power transformer 11, be configured to
This part extra voltage is eliminated when the alternating voltage for determining that the charging pile or cable provide includes extra voltage.
In one embodiment, further comprise the overvoltage crowbar 17 being connect with the power transformer 11, matched
It is set to when the voltage measured at the power transformer 11 is greater than predeterminated voltage and disconnects vehicle mobile equipment 12 or vehicular electricity storage
Pond 18 obtains electric power from charging pile 2.
In one embodiment, impedance control circuit 13 is equipped between the power transformer 11 and pressure limiting circuit 15,
Work is made under bypass condition when its alternating voltage for being configured to the offer of the charging pile 2 described in undetermined includes extra voltage
For current path；And it when the alternating voltage for measuring the offer of charging pile 2 includes extra voltage, works compared with high-impedance state
Under, inhibit one part of current access at this time.
Bypass condition can correspond to relay 16 built in interface and work on state.Due to relay 16 and 14 phase of resistance
Than with lower resistance, so can substantially unaltered pass through the electric power of current path from the electric current that power transformer 11 provides
Transmission.Pressure limiting circuit 15 also may operate in power restricted state.According to a first embodiment of the present invention, pressure limiting circuit 15 is being located
When in power limit working condition, the change of impedance 14 can be set to limitation and pass through this resistance 14 to power supply from charging pile 2
The quantity of power that transformer 11 transmits.For example, the change of impedance 14 can limit the voltage for providing and arriving charging interface, in some feelings
Under condition, in response to absorbing greater amount of electric current by pressure limiting circuit 15 is applied to the voltage provided to vehicle the more day of one's doom
System.
In one embodiment, the resistance under power restricted state can be realized by the way that relay 16 is turned off state
Anti- change.The resistance compared with resistive element 14 of relay 16 is higher as a result, can be with from the electric current that power transformer 11 provides
Pass through resistive element 14.Since the resistance of resistive element 14 is greater than very little, so the voltage relative reduction provided, so that bigger electricity
Stream passes through impedance 14.
In one embodiment, the charging equipment 2 includes power supply identification circuit 21, is configured to respond to fill from described
The connection electric signal of electrical interface 1；The controller 22 for connecting the power supply identification circuit 21 is configured to receive from charging
The data-signal of mouth 1；The suppression circuit 23 for connecting the controller 22 is configured to respond in the data-signal described in expression
The data section signal of output impedance at power transformer 11 lowers the voltage provided to the charging interface 1；Or it cuts
The disconnected access with the power transformer 11.
In another embodiment, the charging recognition methods of charging system for electric automobile includes: in the electric car
When charging interface 1 is electrically connected to charging equipment 2, the first charging voltage of the power transformer 11 at the charging interface 1 is detected；
Connection electric signal is detected to charging equipment 2 by the vehicle mobile equipment 12 of electric car；In the charging of the electric car
Second charging voltage of the detection power transformer 11 at mouthful；It is measured according to first charging voltage and the second charging voltage
The alternating voltage that the charging equipment 2 provides includes extra voltage；And the power supply transformation is changed according to measurement movement
Output impedance at device 11, wherein measurement movement includes: between first charging voltage and the second charging voltage
Ratio in a pre-set interval when, determine provided by alternating voltage include extra voltage.
In one embodiment, however, it is determined that charging pile 2 or cable have possible extra voltage, and charging interface 1 can
To execute additional operation.For example, can based on it is aforementioned it is this judgement come control charging interface 1 from power transformer 11 from consume
Power.Such as, if it is determined that charging pile 2 contains extra voltage, then charging pile 2 can be via charging interface to power transformer
Power is transmitted at 11, can be used for operating the internal circuit of vehicle or is charged to other internal cells of vehicle.On the other hand, if
Determination does not include extra voltage, then charging interface 1 can prevent to transmit power to power transformer 11 via charging interface.Pass through
This mode, charging pile 2 can only be determined as whether include pressure limiting circuit 15 charging interface carry out charging or data manipulation, with
Just user uses.
In one embodiment, the communication between charging pile 2 and charging interface 1 or charged interface establish power transformer
Electrical path between 11 and charging pile 2, charging pile 2 can send on its controller 22 and ask to charging interface identification code
Ask, if not responding it receives effective charging interface identification code, charging pile can attempt again from knowledges different before
Other code sends this request.On the other hand, if receiving effective charging interface identification code, charging pile can be via charging
Mouthful to 11 transimission power of power transformer.In some cases, although charging pile 2 is receiving effective charging interface identification code
It can start to receive power later, but whether charging pile 2 then can be after judging charging interface 1 including pressure limiting circuit 15
Continue or stop transimission power.
In one embodiment, further comprise determine provided by alternating voltage include extra voltage when, pass through by
The power transformer 11 is electrically connected to the pressure limiting circuit 15 on electric car, to eliminate this part extra voltage.
In one embodiment, this part extra voltage being eliminated is decomposed into a vehicle-mounted energy storage device 19.Storage
Energy device 19 may include super capacitor group or other battery packs, and the electric current for branching to this part is opposite to electric automobile
The charging current for carrying battery is smaller, this portion of electrical current is mainly the power supply of smaller current in supply vehicle.
In one embodiment, at charging interface 1 by vehicle mobile equipment 12, such as vehicle based computing system is to charging pile
2 send charging equipment identification codes, charging equipment identification code by controller 22 receive after, information of vehicles is confirmed, then into
Row charging and electricity metering.
Power transformer 11 can be used for providing operating voltage to vehicle, while charging interface 1 can be used for reception and carry out self-charging
The data command that stake 2 is sent.Pressure limiting circuit 15, which can be used for responding from charging pile 2, to be received data command and changes power transformer 11
The impedance of electrical path between charging pile device 2, and in the electric current for drawing preset threshold amount by the pressure limiting circuit 15
When, it reduces from the charging pile 2 to the voltage of the power transformer 11.
Claims (9)
1. a kind of charging recognition methods of charging system for electric automobile, characterized by comprising: in the charging of the electric car
When interface is electrically connected to charging equipment, the first charging voltage of the power transformer at the charging interface is detected；By electronic
The vehicle mobile equipment of automobile detects connection electric signal to charging equipment；Described in being detected at the charging interface of the electric car
Second charging voltage of power transformer；The charging equipment is measured according to first charging voltage and the second charging voltage to mention
The alternating voltage of confession includes extra voltage；And the output impedance at the power transformer is changed according to measurement movement,
The wherein measurement movement includes: the ratio between first charging voltage and the second charging voltage is a preset areas
When interior, determine that provided alternating voltage includes extra voltage.
2. the charging recognition methods of charging system for electric automobile according to claim 1, it is characterised in that: further comprise
When the alternating voltage provided by determining includes extra voltage, by being electrically connected to the power transformer set on electric car
On pressure limiting circuit, to eliminate this part extra voltage.
3. the charging recognition methods of charging system for electric automobile according to claim 2, it is characterised in that: be eliminated this
Part extra voltage is decomposed into a vehicle-mounted energy storage device.
4. the charging recognition methods of charging system for electric automobile according to claim 1, it is characterised in that: further comprise
When the alternating voltage provided by determining includes extra voltage, the access of the power transformer is cut off.
5. a kind of electric car charging circuit, including electric vehicle charge interface and charging station with matching charging are set
It is standby, it is characterised in that the charging interface of the electric car includes: for the alternating current of charging equipment to be converted to direct current
The power transformer of stream；The vehicle mobile equipment being connect with the power transformer, for detecting the electricity at the charging interface
The first charging voltage and the second charging voltage of source transformer measure institute according to first charging voltage and the second charging voltage
The alternating voltage for stating charging equipment offer includes extra voltage；And the impedance control circuit of the connection power transformer, it uses
According to the output impedance at the measurement movement change power transformer.
6. electric car charging circuit according to claim 5, it is characterised in that: further comprise and the power supply transformation
The pressure limiting circuit of device connection is configured to eliminate this when the alternating voltage for determining that the charging equipment provides includes extra voltage
Part extra voltage.
7. electric car charging circuit according to claim 6, it is characterised in that: further comprise and the power supply transformation
The overvoltage crowbar of device connection, the voltage for being configured to measure at the power transformer disconnect vehicle when being greater than predeterminated voltage
It carries mobile device or Vehicular accumulator cell obtains electric power from charging equipment.
8. electric car charging circuit according to claim 6, it is characterised in that: the impedance control circuit is configured to
Work is logical as electric current under bypass condition when the alternating voltage that the charging equipment described in undetermined provides includes extra voltage
Road；And when the alternating voltage for measuring the charging equipment offer includes extra voltage, resistive impedance value is gradually increased to press down
One part of current access processed.
9. electric car charging circuit according to claim 5, it is characterised in that the charging equipment includes: power supply identification
Circuit is configured to respond to the connection electric signal from the charging interface；Connect the controller of the power supply identification circuit, quilt
It is configured to receive the data-signal from charging interface；The suppression circuit for connecting the controller, is configured to: responding the number
It is believed that number in indicate the data section signal of output impedance at the power transformer, lower and provided to the charging interface
Voltage；Or the access of cutting and the power transformer.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811011259.0A CN108973758A (en) | 2018-08-31 | 2018-08-31 | A kind of charging recognition methods of charging system for electric automobile and electric car charging circuit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811011259.0A CN108973758A (en) | 2018-08-31 | 2018-08-31 | A kind of charging recognition methods of charging system for electric automobile and electric car charging circuit |
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| CN112526373A (en) * | 2019-09-03 | 2021-03-19 | 德尔福汽车系统卢森堡股份有限公司 | System and method for monitoring voltage of vehicle on-board battery charger |
| CN112526373B (en) * | 2019-09-03 | 2024-05-17 | 保时捷股份公司 | System and method for monitoring voltage of vehicle-mounted battery charger |
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Application publication date: 20181211 |