CN109941125A - Battery charger and its operation method - Google Patents
Battery charger and its operation method Download PDFInfo
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- CN109941125A CN109941125A CN201910176634.5A CN201910176634A CN109941125A CN 109941125 A CN109941125 A CN 109941125A CN 201910176634 A CN201910176634 A CN 201910176634A CN 109941125 A CN109941125 A CN 109941125A
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- 238000000034 method Methods 0.000 title claims abstract description 25
- 238000007600 charging Methods 0.000 claims abstract description 186
- 238000004088 simulation Methods 0.000 claims abstract description 26
- 230000004044 response Effects 0.000 claims abstract description 11
- 238000004891 communication Methods 0.000 claims abstract description 10
- 230000002159 abnormal effect Effects 0.000 claims description 4
- 230000005611 electricity Effects 0.000 claims description 4
- 238000007689 inspection Methods 0.000 claims 1
- 238000005242 forging Methods 0.000 abstract 1
- 238000013461 design Methods 0.000 description 7
- 238000012545 processing Methods 0.000 description 7
- 230000003993 interaction Effects 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 230000006837 decompression Effects 0.000 description 5
- 230000006872 improvement Effects 0.000 description 5
- 230000008901 benefit Effects 0.000 description 4
- 239000000306 component Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000002955 isolation Methods 0.000 description 3
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 2
- 230000005856 abnormality Effects 0.000 description 2
- 238000007792 addition Methods 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 230000002452 interceptive effect Effects 0.000 description 2
- 229910052744 lithium Inorganic materials 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 239000002253 acid Substances 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000012790 confirmation Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000012217 deletion Methods 0.000 description 1
- 230000037430 deletion Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
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Classifications
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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
-
- 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
- Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
-
- 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
- Y02T90/12—Electric charging stations
-
- 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
- Y02T90/14—Plug-in electric vehicles
-
- 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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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
This application discloses battery charger and its operation methods, and wherein battery charger includes cradle, output cord, master controller, battery simulation straight convertor and at least one charging straight convertor；Master controller is suitable for and charging pile carries out the communication of BMS protocol handshake and the notice battery simulation straight convertor starting work after communicating successfully；Battery simulates straight convertor and is suitable for carrying out boosting inverter to BMS power supply voltage to obtain analog voltage and analog voltage is output to cradle, and wherein analog voltage is in the legal voltage range of charging pile；Master controller is further adapted for issuing charge requirement voltage and charging demand current into charging pile, and notifies at least one charging straight convertor starting work in response to detecting charging pile output voltage；At least one charging straight convertor is suitable for for charged stake output voltage being transformed to battery charging voltage to charge to battery through output cord.The present invention makes standard charging rifle can be used for the charging of low voltage rating battery.
Description
Technical field
This application involves power supply or circuit device or system regions more particularly to battery charger and its operations of distribution
Method.
Background technique
The production capacity increasingly Rapid Expansion of dynamic lithium battery as new energy vehicle core component, cost constantly declines, in portion
Point application gradually substitutes lead-acid battery, as Moped Scooter, mobility scooter for old people, low-speed vehicle and some engineering constructions are extraordinary
Vehicle such as fork truck etc..But for motor vehicle lithium battery voltage rating of these applications is generally in 200V hereinafter, and existing market
On the Charging Specification of all direct current quick charge stakes possessed have 500V and two kinds of 750V, the minimum operating voltages difference of the overwhelming majority
For 200V and 250V, can not be used by above-mentioned vehicle.In addition, the built direct-current charging post in part is also due to geographical position at present
Set, user is few etc., and reasons become idle stake, cause the significant wastage of resource.
Summary of the invention
An object of the application is to provide a kind of battery charger and its operation method, makes the standard possessed at present
High-voltage charge stake can be used for the charging of low voltage rating battery.
In order to solve the above technical problems, according to the first aspect of the invention, providing a kind of battery charger comprising fill
Electric seat and output cord and master controller, battery simulation straight convertor and at least one charging straight convertor；Master controller is suitable
In in response to obtaining BMS (battery management system) power supply voltage and charging pile progress BMS protocol handshake communication and communicating
Notice battery simulation straight convertor starts work after success；Battery is simulated straight convertor and is suitable for BMS power supply voltage
Boosting inverter is carried out to obtain analog voltage and analog voltage is output to cradle, wherein analog voltage is in the legal of charging pile
In voltage range；Master controller is further adapted for charge requirement voltage and charging demand current issuing charging pile, wherein charge requirement
Voltage is greater than analog voltage, and notifies at least one charging straight convertor starting work in response to detecting charging pile output voltage
Make；At least one charging straight convertor be suitable for by the charging pile output voltage that charged seat obtains be transformed to battery charging voltage with
It charges through output cord to battery.
As the improvement of first aspect present invention, battery is simulated in straight convertor and at least one charging straight convertor
Clamp diode is connected between each.
As another improvement of first aspect present invention, the battery charger further includes leadage circuit, is suitable in master
Controller, which determines, is released to safe voltage or less for high voltage when charging terminates or is abnormal.
As the another improvement of first aspect present invention, the battery charger further includes man-machine interaction unit, is fitted
It is shown in user's input to be transmitted to master controller and/or receive information from master controller.
As the another refinement of first aspect present invention, the battery charger further includes status display unit, is fitted
In the current state for showing the battery charger.
As another improvement of first aspect present invention, the master controller is further adapted for, and terminates item in response to reaching charging
Part, at least one charging straight convertor of notice and/or battery simulation straight convertor stop working.
As the another improvement of first aspect present invention, the master controller is further adapted for, in response to detecting that charging pile is defeated
Voltage drops to close to analog voltage out, 1) reduce charging demand current needs until charging pile output voltage is continuously maintained at charging
Until seeking voltage；Or 2) increase charge requirement voltage to promote charging pile output voltage；Or 3) at least one charging of notice is straight
DC converter and/or battery simulation straight convertor stop working.
As the another refinement of first aspect present invention, the charging demand current is the maximum output ability electricity of charging pile
Flow valuve.
According to the second aspect of the invention, a kind of operation method of battery charger, the battery charger are provided
Straight convertor and at least one charging straight convertor are simulated including battery, the method includes the steps:
BMS power supply voltage is obtained from charging pile；
The communication of BMS protocol handshake is carried out with charging pile；
Notice battery simulation straight convertor starting work, battery are simulated straight convertor and are supplied BMS after communicating successfully
Electric supply voltage carries out boosting inverter to obtain analog voltage, and wherein analog voltage is in the legal voltage range of charging pile；
Charge requirement voltage and charging demand current are issued into charging pile, wherein charge requirement voltage is greater than analog voltage；
At least one charging straight convertor starting work is notified in response to detecting charging pile output voltage, and at least one fills
Charging pile output voltage is transformed to battery charging voltage to charge to battery by electric straight convertor.
Device or method through the invention will be greater than one at a voltage rating using the lower vehicle simulation of voltage rating
The vehicle of constant voltage such as 300V, to the charging pile of current 500V and 750V specification can be used to charge, so that at present
Charging pile can come into operation to a greater extent, create due value.Specifically, the present invention has an advantage that
1) it is connected and charges with all direct-current charging posts suitable for the vehicle of any low voltage rating version, it is right
The utilization rate that charging pile can be increased for charging pile operator forms economic benefit；
2) apparatus of the present invention can form a variety of rated power specifications, and volume is not of uniform size to be conveniently placed at different vehicle
On, it is easy to use；
3) the invention enables that can fully utilize the idle charging pile in society, there is very strong social benefit；
4) simulated battery and analog charge stake simultaneously when the master controller work of apparatus of the present invention, unitary design reliability
It is high, at low cost, it is suitble to mass market to promote；
5) have battery simulator function, guarantee effectively to be identified as effective battery by all charging piles, can smoothly enter into
Charging flow control；
6) master controller in apparatus of the present invention is modeled as BMS (battery management system) unit and sends battery letter to charging pile
Breath presses national standard if vehicle end is without BMS and sends virtual and safety battery information；
7) when vehicle encounters circuit deficiency and can not find suitable AC power source, the invention enables using existing direct current
Charging pile carries out emergent charging as input power；
8) design has leadage circuit in apparatus of the present invention, guarantee at the end of charging quickly by high voltage relief to safe voltage with
Under；
9) there is no the application scenarios of BMS for vehicle end, multiple charging straight convertors can be designed in apparatus of the present invention,
Allow set of device to a more than Vehicular charging.
Detailed description of the invention
Fig. 1 is the structural block diagram of an embodiment of battery charger according to the present invention.
Fig. 2 is the operation principle schematic diagram of two straight convertors shown in Fig. 1.
Fig. 3 is the structural block diagram of two straight convertors shown in Fig. 1.
Fig. 4 is the flow chart of the operation method of battery charger according to the present invention.
For clarity, these attached drawings are figure that is schematic and simplifying, they are only gived for understanding institute of the present invention
Necessary details, and omit other details.
Specific embodiment
Embodiments of the present invention and embodiment are described in detail with reference to the accompanying drawings.
By detailed description given below, the scope of application of the invention will be evident.It will be appreciated, however, that detailed
While thin description and specific example show the preferred embodiment of the present invention, they are provided only for illustration purpose.
Fig. 1 shows the structure of a preferred embodiment of battery charger of the present invention.The battery of the embodiment, which charges, to be filled
It sets including cradle, output cord, power circuit, master controller, battery simulation straight convertor, charging straight convertor, people
Machine interactive unit and leadage circuit.Cradle uses the cradle interface of latest national standards, in battery charger work
It is connected when making with the charging gun of direct-current charging post.Output cord is used in battery charger work and vehicle end DC charging
Mouth connection, the cable meet professional standard or national standard and with plugs, and inside can be also used in addition to having power cable
Connect the signal wire of confirmation.The input of power circuit is provided by the charging gun BMS power supply on charging pile, and power circuit is supported
The input of 9-36V wide-voltage range guarantees the charging pile of compatible offer 24V and 12V BMS power supply, and power circuit is to BMS
The power supply of offer is performed some processing such as filtering processing, the output supply master controller of power circuit, the straight transformation of battery simulation
Device, possibility and vehicle end BMS, other elements such as contactor and indicator light etc..In other embodiments, master controller, battery mould
The operating voltage of quasi- straight convertor etc. can also be obtained directly from BMS power supply.Master controller executes vehicle for charging pile end
End BMS analog functuion, for Vehicular battery end execute charging pile analog functuion and control two straight convertors start-stop
And operating parameter.Master controller is adapted for obtaining BMS power supply voltage, carries out BMS according to national standard agreement and charging pile
Protocol handshake communication simultaneously simulates straight convertor starting work according to respective country normal notification battery after communicating successfully, guarantees
Charging pile controller can enter correctly into next step interaction flow after charging pile can sample legal voltage value.Two straight convertors
It is the function of the power cell and simulated battery voltage for realizing energy conversion, can be transformer isolation type or transless
Non-isolation type.Battery simulates straight convertor work in boost mode, be suitable for carrying out BMS power supply voltage boosting inverter with
The cell voltage of simulation is simultaneously output to cradle by simulated battery voltage, the legal voltage of the cell voltage of the simulation in charging pile
In range, so that the Vehicular battery with low voltage rating can be electrically charged stake identification.Make the cell voltage of simulation in charging pile
Charging output area (normal range of operation) of the voltage for mainly charging pile being allowed to detect in legal voltage range in charging pile
It is interior.Legal voltage range is usually the voltage rating output area of charging pile, in conjunction with current domestic charging pile there are 500V and
Two kinds of specifications of 750V, this legal voltage range can take 200~500V, optimal using choosing one again in conjunction with different product
Value.Master controller is further adapted for charge requirement voltage and charging demand current issuing charging pile, and wherein charge requirement voltage is greater than
The cell voltage of simulation, charging demand current can be the maximum output ability current value of charging pile.Master controller is additionally in response to examine
It measuring charging pile output voltage and notifies charging straight convertor starting work, charging straight convertor works in decompression mode,
Input voltage is the power output voltage of charging pile, and the DC voltage reduced output voltage that charging pile charging gun is exported is to Vehicular battery
Charge function is realized at end.For some special vehicles, if voltage high pressure 500V, the straight convertor that charges should be designed as rising
Decompression mode.When charging when work (charging straight convertor), battery simulation straight convertor can stop working and also after
Continuous work.Leadage circuit is used to determine that charging terminates or when abnormal ending quickly by input terminal in device and defeated in master controller
Below the dangerous high voltage relief to safe voltage of outlet.Man-machine interaction unit can be formed or be configured to by screen, key etc.
More advanced touch screen, the charging current of low-pressure side can be set by manually setting, and such situation is suitble to battery-end not have BMS
Application scenarios, the size of charging current can be determined in conjunction with the demand of oneself, by the agreement of BMS if vehicle end also has BMS
It charges.It, at this time can be by external communication interface or toggle switch etc. to the dress in certain application scenarios such as no touch screen
Carry out functional configuration is set, such as whether configuration vehicle end has BMS, charging current.In other embodiments, battery charging dress
It sets and may also include status display unit such as indicator light, buzzer etc., be suitable for showing the current state of battery charger.It is man-machine
The concrete composition of interactive unit and/or status display unit carries out reasonable additions and deletions in combination with cost control.
In other embodiments, battery charger also may not include man-machine interaction unit, status display unit and/or let out
Electric discharge road.
In other embodiments, battery charger may include more than two charging straight convertors, more than two straight
Connection and work relationship between each of converter and other components are as in conjunction with as described in Fig. 1, to realize simultaneously
To more than two vehicle battery chargings.
Fig. 2 shows the working principles of two straight convertors in Fig. 1.V4 is the BMS power supply of charging pile output
Voltage, for different charging piles, there are 12V and two kinds of 24V for this voltage.Vehicle end cell voltage is V2, and simulated battery is straight
DC converter obtains V1 after voltage V 4 boosts, charging straight convertor does not work, the charging that master controller is issued to charging pile
Demand voltage is V3, and demand current is provided by charging pile maximum output current, V3 > V1 > V2 > V4.After charging pile starting, by
It does not work in charging straight convertor, at this time due to the presence of clamp diode, charging pile works in constant voltage mode, constant pressure point
For V3, simulated battery straight convertor still exports V1, but the port voltage of device will rise to V3 by V1.Clamp diode is used
In the influence for blocking charging pile output voltage to simulate straight convertor to battery, while can stop working during the charging process, with
Just the load of charging pile BMS power supply is reduced.Master controller notice charging straight convertor starts work, at this time charge requirement
Given by vehicle end BMS and battery charger is set it is given determine, the two gets the small value as charging demand current value,
If vehicle is no BMS model, charging current is controller setting value.The characteristics of such method is that charging pile operates mainly in constant pressure
Mode causes charging pile to enter constant current mode as vehicle end charge requirement is excessive, i.e. master controller detects that voltage V3 i.e. will be small
When V1, can there is 3 kinds of Processing Algorithms at this time: 1) charging unit is by electric current of demaning reduction until charging pile output voltage continues to tie up
V3 is held, such method can reduce charge power and speed；2) charging unit is exported charging pile by increasing charge requirement voltage
For voltage increase to another reasonable voltage V5, such scheme can maintain charge power and speed constant；3) when both the above scheme all
It not can solve controller of the problem then in device and provide charging halt instruction.Above 3 kinds of control modes need the control in device
The technical parameter and vehicle end cell voltage of device combined charge straight convertor carry out optimum decision and execute.For example, charging dress
Parameter-embedded configuration item is set, user can choose method 1) or method 2) carry into execution a plan as first choice.Charging unit can also be with
It is configured to adapt to automatically, first choice presses method 2) it executes, if it find that needing voltage still cannot to maximum value by improving charging
Guarantee that voltage V3 perseverance is lived, then start by method 1) it executes, it reduces the charging current of charged side, reduce charge power.Two straight
The advantages of converter, is independently of one another, is two sets of circuits, work respectively realize to vehicle battery charging and simulation one can
For the cell voltage that charging pile normally identifies, guarantee that direct current stake can give Vehicular charging.
Fig. 3 shows the schematic structure of two straight convertors.Direct current input filter capacitor is for filtering out external input
Electromagnetic interference and reduce itself to extraneous interference.Bus capacitor C is used to stable DC input voltage, guarantees charging process
Stability.Power switch inverter circuit is made of power MOS pipe or IGBT and matched driving circuit, for input
DC voltage carries out high frequency and switches on-off.Transformer use high frequency transformer scheme, by the square-wave voltage of primary side carry out boosting or
Person's decompression, is determined by convertor controls chip, can not such as be used using not this transformer of isolation scheme.Power rectifying circuit will
Ac square-wave voltage is rectified into DC voltage, and voltage value is determined by control chip.Output filter circuit for reducing filter out transformation
The circuit interference that device itself generates, reduces the influence to external circuitry.The fortune that control chip is provided according to the master control system of device
Row instruction, starts or stops working, and needs to sample the voltage of output when starting, and current value simultaneously algorithmically calculates level signal
To the driving circuit of power switch inverter circuit, the output voltage values of needs are finally obtained.For different application, straight become of charging
Parallel operation can be designed as decompression mode and be also designed to boost mode, or have wide output area design (compatible boosting and
Decompression), the difference of this design is mainly reflected in the manufacturing cost of device, does not influence realization and result of the invention.In the present invention
Straight convertor be universal design, those skilled in the art can design completions, only in cost, reliability and realize original
Reason topology is upper variant, but the above difference does not interfere with the availability of final realization principle and device of the invention.
Fig. 4 shows use and the operation method of battery charger of the invention.In step S10, by charging unit
Output cord is connected with vehicle.In step S11, by the cradle of the charging gun insertion charging unit of charging pile.The operation of this two step
Not inevitable precedence relationship.After the connection of the both ends of device, in step S12, charging operations are carried out on charging pile, are filled
Electric stake carries out self-test by national standard protocol requirement, exports BMS power supply by charging gun after self-test is without exception.In step S13, electricity
After pond charging unit obtains BMS power supply, master controller is waken up, and is started the work for simulating BMS, according to national standard agreement and is filled
Electric stake starts the communication of BMS protocol handshake, and after shaking hands successfully, master controller notice battery simulation straight convertor works and exports
Voltage, charging pile controller can enter correctly into next step interaction flow after guarantee charging pile can sample legal voltage value, simultaneously
It can carry out status display and abnormality processing (step S20).In step S14, by national standard protocol interaction process, battery charger
Charge requirement instruction is issued to charging pile, the voltage value in the instruction is an appropriate value, but the value has to be larger than battery simulation
The output voltage of straight convertor, and current value can be the maximum output ability current value of charging pile, charging pile presses national standard agreement
The current value has been issued to charge the battery the master controller of device.In step S15, charging pile output voltage, charging pile at this time
Work constant voltage mode, which is issued by communication to charging pile by master controller.Battery charger and charging pile into
In row charging national standard protocol handshake flowchart process, if there are BMS for vehicle end, while also carrying out step S30, the master in device
Controller and vehicle BMS carry out handshake communication.In step S31, after the completion of battery charger is interacted with vehicle BMS, into etc.
To state.In step S16, master controller detects starting charging straight convertor work after charging pile output voltage, gives vehicle
Battery charges.In step S17, after reaching termination condition, into process is shut down, shutdown processing is carried out by national standard process, is filled
Setting controller allows two straight convertors to stop working.Termination condition can be provided by vehicle end BMS, or by battery charger
It provides or is provided by charging pile.In step S18, charging pile carries out shutdown processing.In step S19, charging complete, vehicle end is extensive
Original standby mode is arrived again, and extracting output cord and charging gun, entire charging flow terminates.Above step such as occur it is abnormal if into
Enter abnormality processing step S20, performance results are that charging can not carry out or stop charging.
Multiple and different embodiments or its a particular feature, structure, or characteristic described herein can be at of the invention one or more
It is appropriately combined in a embodiment.
Unless explicitly stated otherwise, singular as used herein " one ", "the" include that plural reference (has " at least one "
The meaning).It will be further understood that terminology used herein " having ", " include " and or " include " show in the presence of described
Feature, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, operation, component, assembly unit
And/or combination thereof.Term "and/or" as used in this includes any and all group of one or more relevant items enumerated
It closes.
Some currently preferred embodiments of the present invention is foregoing described, it should be emphasized, however, that the present invention is not limited to these
Embodiment, but can be realized with the other way within the scope of present subject matter.Those skilled in the art can be in the technology of the present invention
It the inspiration of design and does not depart from various variants and modifications is made to the present invention on the basis of the content of present invention, these variations or modifications
It still falls within protection scope of the present invention.
Claims (10)
1. a kind of battery charger, including cradle and output cord, which is characterized in that the charging unit further includes master control
Device, battery simulation straight convertor and at least one charging straight convertor processed；Master controller is adapted for obtaining BMS power supply electricity
Source voltage and charging pile carry out the communication of BMS protocol handshake and the notice battery simulation straight convertor starting work after communicating successfully
Make；Battery simulation straight convertor is suitable for carrying out boosting inverter to BMS power supply voltage to obtain analog voltage and will simulate
Voltage output is to cradle, and wherein analog voltage is in the legal voltage range of charging pile；Master controller, which is further adapted for charge, to be needed
Voltage and charging demand current is asked to issue charging pile, wherein charge requirement voltage is greater than analog voltage, and fills in response to detecting
Electric stake output voltage and notify at least one charging straight convertor starting work；At least one charging straight convertor is suitable for will be through filling
The charging pile output voltage that electric seat obtains is transformed to battery charging voltage to charge through output cord to battery.
2. battery charger according to claim 1, which is characterized in that battery simulation straight convertor is filled at least one
Clamp diode is connected between each of electric straight convertor.
3. battery charger according to claim 1, which is characterized in that the battery charger further includes vent discharge
Road is suitable for that high voltage is released to safe voltage or less when master controller determines that charging terminates or is abnormal.
4. battery charger according to claim 1, which is characterized in that the battery charger further includes man-machine friendship
Mutual unit is suitable for user's input being transmitted to master controller and/or show from master controller reception information.
5. battery charger according to claim 1 or 4, which is characterized in that the battery charger further includes shape
State display unit is suitable for showing the current state of the battery charger.
6. battery charger according to claim 1, which is characterized in that the master controller is further adapted for, in response to reaching
To end-of-charge condition, at least one charging straight convertor of notice and/or battery simulation straight convertor stop working.
7. battery charger according to claim 1, which is characterized in that the master controller is further adapted for, in response to inspection
It measures charging pile output voltage and drops to close to analog voltage, 1) reduce charging demand current until charging pile output voltage continues
Until maintaining charge requirement voltage；Or 2) increase charge requirement voltage to promote charging pile output voltage；Or it 3) notifies
At least one charging straight convertor and/or battery simulation straight convertor stop working.
8. battery charger according to claim 1, which is characterized in that the charging demand current be charging pile most
Big fan-out capability current value.
9. battery charger according to claim 5, which is characterized in that the status display unit is indicator light, bee
Ring device and/or touch-sensitive display.
10. a kind of operation method of battery charger, which is characterized in that the battery charger includes that battery simulation is straight
Converter and at least one charging straight convertor, the method includes the steps:
BMS power supply voltage is obtained from charging pile；
The communication of BMS protocol handshake is carried out with charging pile；
The notice battery simulation straight convertor starting work after communicating successfully, battery simulate straight convertor to BMS power supply electricity
Source voltage carries out boosting inverter to obtain analog voltage, and wherein analog voltage is in the legal voltage range of charging pile；
Charge requirement voltage and charging demand current are issued into charging pile, wherein charge requirement voltage is greater than analog voltage；
At least one charging straight convertor starting work is notified in response to detecting charging pile output voltage, and at least one charging is straight
Charging pile output voltage is transformed to battery charging voltage to charge to battery by DC converter.
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Application publication date: 20190628 |