CN108336782A - A kind of double charging gun charging current distribution methods - Google Patents
A kind of double charging gun charging current distribution methods Download PDFInfo
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- CN108336782A CN108336782A CN201810096936.7A CN201810096936A CN108336782A CN 108336782 A CN108336782 A CN 108336782A CN 201810096936 A CN201810096936 A CN 201810096936A CN 108336782 A CN108336782 A CN 108336782A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
-
- 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
- B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
- B60L53/10—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles characterised by the energy transfer between the charging station and the vehicle
- B60L53/14—Conductive energy transfer
-
- 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
- B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
- B60L53/60—Monitoring or controlling 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
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/64—Electric machine technologies 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
- 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
- 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
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The present invention provides a kind of double charging gun charging current distribution methods, including：A, the maximum output current of the first charging machine and the second charging machine of double charging guns is obtained respectively by BMS；B, the receptible maximum charging current of battery pack institute of charging equipment is obtained by BMS；C, by BMS according to the battery pack of the maximum output current and the charging equipment of first charging machine and the second charging machine receptible maximum charging current calculate the maximum charging currents of double charging guns chargings；D, the inductive charging electric current of the first charging machine and the second charging machine is calculated separately out according to the maximum charging current and the maximum output current of first charging machine and the second charging machine；E, BMS indicates that first charging machine and the second charging machine export charging current according to the first charging machine of the acquisition and the inductive charging electric current of the second charging machine.
Description
Technical field
The present invention relates to power battery of pure electric automobile fields, and in particular to a kind of double charging gun charging currents distribution side
Method.
Background technology
Current China promotes the execution of every energy-saving and emission-reduction policy with all strength, and the popularization and application of all kinds of new-energy automobiles, which are used as, to be had
Effect means, in widespread attention, especially on the one hand pure electric automobile may be used because it uses electric drive not use fuel oil completely
Dependence of the China to petroleum resources is efficiently reduced, limited oil can be used for prior aspect, another aspect vehicle fortune
Tail gas and exhaust emission are not generated during row, is even more to be promoted by emphasis in the relatively serious large- and-medium size cities of pollution problem.With
And come be that people are also higher and higher for the requirement in terms of pure electric automobile performance, function, it is more and more.
Charging under the premise that security is guaranteed, shortens the charging time, is each automobile as far as possible as one of Core Feature
The target that manufacturer lays siege to.Pure electric vehicle passenger car considers that personal user's charge condition has again because battery capacity is smaller
Limit, mostly uses AC charging mode or AC charging adds the mode of DC charging；Pure electric vehicle commercial car, such as logistic car, bus
Deng, because battery capacity is big, higher is required to charging rate, it is general to use DC charging mode, charge port quantity 1 to 2.Wherein
There is the vehicle of 2 charge ports, can support double charging gun DC chargings.Current normal method is the charging electricity of mean allocation rush-harvesting and rush-planting
Stream, rush-harvesting and rush-planting charging current is consistent, and advantage is that control algolithm is simple, the disadvantage is that charger ability cannot be given full play to,
Especially when two external charger fan-out capabilities differ greatly, electric current 1 is such as kept：1 distributes, then small-power charger
Full power output state is will always be in, high-power charger is constantly in drop power output state, and gross output is maximum only
It can be twice of small-power charger, cannot effectively play rush-harvesting and rush-planting charging advantage.
Therefore, there is an urgent need for a kind of double charging gun charging current distribution methods at present.It is defeated according to different charger maximums to realize
Output capacity distributes its electric current that should be exported for it respectively, can increase total charging current, shortens the charging time.Avoid small-power simultaneously
Equipment accelerated ageing caused by charger long-time full power operation.
Invention content
In view of this, present applicant proposes a kind of double charging gun charging current distribution methods.According to two charger maximums
Fan-out capability distributes its electric current that should be exported for it respectively, can increase total charging current, shortens the charging time.Avoid small work(simultaneously
Equipment accelerated ageing caused by rate charger long-time full power operation.
The application provides a kind of double charging gun charging current distribution methods, including step：
A, obtained respectively by battery management system BMS double charging guns the first charging machine and the second charging machine most
Big output current；
B, the receptible maximum charging current of battery pack institute of charging equipment is obtained by battery management system BMS；
C, by battery management system BMS according to the maximum output current of first charging machine and the second charging machine
And the battery pack of the charging equipment receptible maximum charging current calculate the maximum charges of double charging guns chargings
Electric current；
D, according to the maximum charging current and the maximum output current of first charging machine and the second charging machine
Calculate separately out the inductive charging electric current of the first charging machine and the second charging machine；
F, battery management system BMS is according to the first charging machine of the acquisition and the inductive charging electric current of the second charging machine
Indicate first charging machine and the second charging machine output charging current.
By upper, the maximum charge that the application can be received according to two charger maximum output abilities and with charging equipment is electric
Stream is that charger distributes its electric current that should be exported, and can increase total charging current, shorten the charging time.Small-power is avoided to charge simultaneously
Equipment accelerated ageing caused by captain's time full power operation.
Preferably, the step A includes：
Receive being sent out most for first charging machine and the second charging machine respectively by battery management system BMS
Big charging ability message, and by obtaining first charging machine and the second charging machine after the packet parsing respectively
Maximum output current.
Preferably, the calculation formula of the maximum charging current is：
Imax=MAx (/Pack_max, (IChrger1_max+IChrger2_max))
Wherein, ImaxFor maximum charging current；IPack_maxFor the receptible maximum charging current of the battery pack；
IChrger1_maxFor the maximum output current of the first charging machine；IChrger2_maxFor the maximum output current of the second charging machine.
Preferably, the step D includes：
Current division ratio is obtained according to the maximum output current of first charging machine and second charging machine；
The first charging machine and the second charging are obtained respectively according to the maximum charging current and the current division ratio
The charging current of motor.
Preferably, the calculation formula for obtaining current division ratio is：
Wherein, k is current division ratio, IChrger1_maxFor the maximum output current of the first charging machine；IChrger2_maxFor
The maximum output current of second charging machine.
Preferably, the calculation formula of the inductive charging electric current of the first charging machine described in step D is：
Ichrger1=Imax×k
Wherein, Ichrger1For the inductive charging electric current of the first charging machine；ImaxFor maximum charging current；K is electric current distribution system
Number.
Preferably, the calculation formula of the inductive charging electric current of the second charging machine described in step D is：
Ichrger2=Imax×(1-k)
Wherein, Ichrger2For the inductive charging electric current of the second charging machine；ImaxFor maximum charging current；K is electric current distribution system
Number.
In conclusion present applicant proposes a kind of double charging gun charging current distribution methods.According to two charger maximums
Fan-out capability calculates the allocation proportion for exporting its electric current, can increase total charging current, shortens the charging time.Avoid small-power simultaneously
Equipment accelerated ageing caused by charger long-time full power operation.When two external charger charging abilities are identical, the patent
The method effect is consistent with prior art effect, does not have negative interaction.
Description of the drawings
Fig. 1 is a kind of flow diagram of double charging gun charging current distribution methods provided by the embodiments of the present application；
Fig. 2 is a kind of flow diagram of double charging gun charging current distribution methods provided by the embodiments of the present application.
Specific implementation mode
The application is illustrated below in conjunction with the attached drawing in the embodiment of the present application.
Embodiment one
As shown in Figure 1, the embodiment of the present application provides a kind of double charging gun charging current distribution computational methods, including walk as follows
Suddenly：
S101 obtains the first charging machine and the second charging machine of double charging guns by battery management system BMS respectively
Maximum output current.
Specifically, receive the institute of first charging machine and the second charging machine respectively by battery management system BMS
Send out maximum charge ability message (wherein including signal has a maximum output voltage, minimum output voltage, maximum output current,
Minimum output current), and by obtaining first charging machine and the second charging machine after the packet parsing respectively
Maximum output current.
S102 obtains the receptible maximum charging current of battery pack institute of charging equipment by battery management system BMS.
S103, by battery management system BMS according to the maximum output of first charging machine and the second charging machine
The battery pack of electric current and the charging equipment receptible maximum charging current calculate the maximums of double charging guns chargings
Charging current.
Wherein, the calculation formula of the maximum charging current is：
Imax=MAX (IPack_max,(IChrger1_max+IChrger2_max))
Wherein, ImaxFor maximum charging current；IPack_maxFor the receptible maximum charging current of the battery pack；
IChrger1_maxFor the maximum output current of the first charging machine；IChrger2_maxFor the maximum output current of the second charging machine.
Specifically, BMS is according to system current state, and such as battery core monomer temperature, voltage, the information such as SOC, SOH estimate and work as
The preceding receptible maximum charging current I of battery packPack_max(this part is the prior art of BMS, is not belonging to the present invention).BMS roots
According to the maximum acceptable charging current of battery pack and the maximum total output current of charger, calculates the maximum that whole system can be realized and fill
Electric current ImaxBecause of national regulations charging current negative number representation, above be maximized (MAX operations) in formula, be equivalent to and take absolutely
To being worth smaller electric current as Imax。
S104 obtains electric current distribution according to the maximum output current of first charging machine and second charging machine
Coefficient；And the first charging machine and the second charging electricity are obtained according to the maximum charging current and the current division ratio respectively
The inductive charging electric current of machine.
Wherein, the calculation formula for obtaining current division ratio is：
Wherein, k is current division ratio, IChrger1_maxFor the maximum output current of the first charging machine；IChrger2_maxFor
The maximum output current of second charging machine.
Wherein, the calculation formula of the inductive charging electric current of first charging machine is：
Ichrger1=Imax×k
Wherein, Ichrger1For the inductive charging electric current of the first charging machine；ImaxFor maximum charging current；K is electric current distribution system
Number.
Wherein, the calculation formula of the inductive charging electric current of the second charging machine described in step D is：
Ichrger2=Imax×(1-k)
Wherein, Ichrger2For the inductive charging electric current of the second charging machine；ImaxFor maximum charging current；K is electric current distribution system
Number.
S105, battery management system BMS are according to the inductive charging of the first charging machine and the second charging machine of the acquisition
Electric current indicates that first charging machine and the second charging machine export charging current.
In constant-current charging phase, BMS is according to the call format in charging national standard agreement, by IChrger1, IChrger2As electric current
Inductive charging is sent to charger, and charger instructs output current by BMS.In the entire charging stage, BMS wants real-time update battery pack
Maximum allowable charging current IPack_maxWith charger inductive charging electric current IChrger1, IChrger2, when (this part is for judgement charging complete
The prior art of BMS, is not belonging to the present invention) after, I is setChrger1=0, IChrger2=0, terminate charging flow.
In order to illustrate more clearly of the technical solution of the application, now it is illustrated below：
The electric current distribution computational methods of the present invention can be implemented in the vehicle for supporting rush-harvesting and rush-planting charging, specially BMS controllers.
Below by taking a kind of pure electric vehicle bus for supporting rush-harvesting and rush-planting to charge as an example.
Situation 1, it is assumed that the pure electric vehicle bus charger connection different from two power, and the total fan-out capability of two chargers
Ability is received more than battery pack.After starting charging, BMS receives the maximum charge ability message that charger is sent out, and is obtained after parsing
First charger maximum output current -150A, the second charger maximum output current -100A.BMS calculating current distribution coefficients According to current system situation, the battery pack permission maximum charging current that BMS is estimated is
220A.The then maximum allowable charging current I of systemmax=MAX (- 220, (- 150-100))=- 220A, charging current are connect by battery
Receiving can power limit.The first charger inductive charging electric current I can be calculated according to the method for the present inventionChrger1=-220*0.6=-132A,
Second charger inductive charging electric current IChrger2=-220* (1-0.6)=- 88A.Vehicle actual charge current I=-132-88=-
220A and ImaxUnanimously.Because the total fan-out capability of charger is more than battery, the method according to the invention, two chargers are without complete
Power output, so that it may to meet battery request.Such as use common equal current distribution method, practical total charging current I=-100-
100=-200A is less than the maximum allowable charging current I of systemmax=-220A, and the second charger wants total power to export, and can accelerate
Ageing equipment.Control effect is worse than method proposed by the invention.
Situation 2, it is assumed that pure electric vehicle bus charger identical with two power is connect, and maximum output ability is all -150A
Other conditions are identical as situation 1, then after starting charging, BMS calculating current distribution coefficientsRoot
According to current system situation, the battery pack that BMS is estimated allows maximum charging current to be 220A.The then maximum allowable charging current of system
Imax=MAX (- 220, (- 150-150))=- 220A, charging current is by battery receptacle energy power limit.According to the method for the present invention may be used
Calculate the first charger inductive charging electric current IChrger1=-220*0.5=-110A, the second charger inductive charging electric current IChrger2
=-220* (1-0.5)=- 110A.Vehicle actual charge current I=-110-110=-220A and ImaxUnanimously.Such situation with
General common methods, i.e. mean allocation charging current, effect are consistent.
Situation 3, it is assumed that the pure electric vehicle bus charger connection different from two power, and the total fan-out capability of two chargers
Ability is received less than battery pack.After starting charging, BMS receives the maximum charge ability message that charger is sent out, and is obtained after parsing
First charger maximum output current -50A, the second charger maximum output current -100A.BMS calculating current distribution coefficients According to current system situation, the battery pack permission maximum charging current that BMS is estimated is
220A.The then maximum allowable charging current I of systemmax=MAX (- 220, (- 50-100))=- 150A, charging current are defeated by charger
Output capacity limits.The first charger inductive charging electric current I can be calculated according to the method for the present inventionChrger1=-150*0.33=-50A,
Second charger inductive charging electric current IChrger2=-150* (1-0.33)=- 100A.Vehicle actual charge current I=-50-100
=-150A and ImaxUnanimously.Because the total fan-out capability of charger is insufficient, two chargers are required for total power to export.This kind of situation is such as
According to the mean allocation method of the prior art, single charger maximum charging current IChrger1=IChrger2=-50A, vehicle are practical
Charging current I=-50-50=-100A, total charging current reduce 50A, and the second charger is but only used 50% ability, made
The waste of forming apparatus ability.It can be seen that the technical solution of the application can avoid the waste of capacity of equipment.
In conclusion present applicant proposes a kind of double charging gun charging current distribution methods.According to two charger maximums
Fan-out capability calculates the allocation proportion of output current, can increase total charging current, shortens the charging time.Small-power is avoided to fill simultaneously
Equipment accelerated ageing caused by motor long-time full power operation.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
With within principle, any modification, equivalent replacement, improvement and so on should all be included in the protection scope of the present invention god.
Claims (7)
1. a kind of double charging gun charging current distribution methods, which is characterized in that including step：
A, the maximum of the first charging machine and the second charging machine that obtain double charging guns respectively by battery management system BMS is defeated
Go out electric current；
B, the receptible maximum charging current of battery pack institute of charging equipment is obtained by battery management system BMS；
C, by battery management system BMS according to the maximum output current of first charging machine and the second charging machine and
The battery pack of the charging equipment receptible maximum charging current calculate the maximum charging currents of double charging guns chargings；
D, distinguished according to the maximum charging current and the maximum output current of first charging machine and the second charging machine
Calculate the inductive charging electric current of the first charging machine and the second charging machine；
E, battery management system BMS is indicated according to the first charging machine of the acquisition and the inductive charging electric current of the second charging machine
First charging machine and the second charging machine export charging current.
2. according to the method described in claim 1, it is characterized in that, the step A includes：
The maximum sent out for receiving first charging machine and the second charging machine respectively by battery management system BMS is filled
Electric energy power message, and pass through the maximum to obtaining first charging machine and the second charging machine after the packet parsing respectively
Output current.
3. according to the method described in claim 1, it is characterized in that, the calculation formula of the maximum charging current is：
Imax=MAX (IPack_max,(IChrger1_max+IChrger2_max))
Wherein, ImaxFor maximum charging current；IPack_maxFor the receptible maximum charging current of the battery pack；IChrger1_max
For the maximum output current of the first charging machine；IChrger2_maxFor the maximum output current of the second charging machine.
4. according to the method described in claim 1, it is characterized in that, the step D includes：
Current division ratio is obtained according to the maximum output current of first charging machine and second charging machine；
The first charging machine and the second charging machine are obtained respectively according to the maximum charging current and the current division ratio
Inductive charging electric current.
5. according to the method described in the claim 3, which is characterized in that the calculation formula for obtaining current division ratio
For：
Wherein, k is current division ratio, IChrger1_maxFor the maximum output current of the first charging machine；IChrger2_maxIt is second
The maximum output current of charging machine.
6. according to the method described in claim 3, it is characterized in that, the inductive charging electric current of the first charging machine described in step D
Calculation formula is：
Ichrger1=Imax×k
Wherein, Ichrger1For the inductive charging electric current of the first charging machine；ImaxFor maximum charging current；K is current division ratio.
7. according to the method described in claim 3, it is characterized in that, the inductive charging electric current of the second charging machine described in step D
Calculation formula is：
Ichrger2=Imax×(1-k)
Wherein, Ichrger2For the inductive charging electric current of the second charging machine；ImaxFor maximum charging current；K is current division ratio.
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| CN111376749A (en) * | 2018-12-28 | 2020-07-07 | 郑州宇通客车股份有限公司 | Electric vehicle charging system and large-current quick charging method |
| CN111376749B (en) * | 2018-12-28 | 2021-10-01 | 郑州宇通客车股份有限公司 | Electric vehicle charging system and large-current quick charging method |
| CN113135108A (en) * | 2020-07-30 | 2021-07-20 | 长城汽车股份有限公司 | Charging control method and system and vehicle |
| CN113135108B (en) * | 2020-07-30 | 2022-08-19 | 长城汽车股份有限公司 | Charging control method and system and vehicle |
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