CN108583305A - Charging precision diagnosis method, device and chip - Google Patents
Charging precision diagnosis method, device and chip Download PDFInfo
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- CN108583305A CN108583305A CN201810195174.6A CN201810195174A CN108583305A CN 108583305 A CN108583305 A CN 108583305A CN 201810195174 A CN201810195174 A CN 201810195174A CN 108583305 A CN108583305 A CN 108583305A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
- B60L58/12—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries responding to state of charge [SoC]
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/7072—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
Abstract
The invention discloses a charging precision diagnosis method, a charging precision diagnosis device and a chip. The method comprises the following steps: the method comprises the steps of acquiring a current request value when a battery management system requests current for a charging pile at a specified charging stage in the charging process of a battery; acquiring a feedback current value output by the charging pile in response to a request of a battery management system; and calculating the output current precision value of the charging pile in the specified charging stage based on the request current value and the feedback current value. According to the charging precision diagnosis method, the charging precision diagnosis device and the charging precision diagnosis chip, the output current precision of the charging pile can be accurately judged in the battery charging process.
Description
Technical field
The present invention relates to a kind of power battery field more particularly to charging accuracy diagnostic method, device and chips.
Background technology
The energy saving and feature of environmental protection based on electric vehicle, electric vehicle replacing fuel oil automobile have become becoming for car industry development
Gesture, on-vehicle battery group are responsible for storing and providing electric energy, are electric vehicle normally travels as the core component of electric vehicle
Motivational guarantee.
Using charging pile be electric vehicle charged during, charging pile can by with battery management system
(Battery Management System, BMS) is communicated, and message interaction is carried out with BMS, and the data provided according to BMS are dynamic
State adjusts charge parameter, completes the charging process to rechargeable battery used in electric vehicle.
The constant charge to electric vehicle may be implemented in high-precision charging pile, improves on-vehicle battery group in charging process
State-of-charge (State Of Charge, SOC) computational accuracy, and on-vehicle battery group full of when automatically power off, to avoid battery
Group overcharges, life time decay excessive velocities or the problems such as battery pack inconsistency.But the quality of current most of charging piles
It is irregular, can not in charging process accurate judgement charging pile precision.
Invention content
A kind of charging accuracy diagnostic method of offer of the embodiment of the present invention, device and chip, can be in battery charging process
The output current precision of accurate judgement charging pile.
One side according to the ... of the embodiment of the present invention provides a kind of charging accuracy diagnostic method, including：In battery charging process
The specified charging stage, obtain battery management system to charging pile ask electric current when request current value；Obtain charging pile response
In the feedback current that the request of battery management system exports；Based on request current value and feedback current, calculate specified
The output current accuracy value of charging stage charging pile.
Another aspect according to the ... of the embodiment of the present invention provides a kind of charging accuracy diagnostic device, including：Request current value obtains
Modulus block, in the specified charging stage of battery charging process, obtaining when battery management system asks electric current to charging pile
Ask current value；Feedback current acquisition module is exported for obtaining charging pile in response to the request of battery management system
Feedback current；Accuracy value computing module, for based on request current value and feedback current, calculating to be filled in the specified charging stage
The output current accuracy value of electric stake.
It is according to the ... of the embodiment of the present invention in another aspect, provide a kind of charging accuracy diagnosing chip, including：Memory and processing
Device；The memory is for storing program；The processor is for reading the executable program code stored in memory to execute
The charging accuracy diagnostic method stated.
Charging accuracy diagnostic method, device and chip according to embodiments of the present invention, can be in battery charging process
It is the different charging stages, accurate to calculate charging according to the feedback current of the request current value and charging pile of battery management system
The precision of the output current of stake.
Description of the drawings
In order to illustrate the technical solution of the embodiments of the present invention more clearly, will make below to required in the embodiment of the present invention
Attached drawing is briefly described, for those of ordinary skill in the art, without creative efforts, also
It can be obtain other attached drawings according to these attached drawings.
Fig. 1 is the flow chart for showing charging accuracy diagnostic method according to the ... of the embodiment of the present invention；
Fig. 2 is the detail flowchart for showing the charging accuracy diagnostic method according to the disclosure some exemplary embodiments；
Fig. 3 is the detail flowchart for showing charging accuracy diagnostic method according to another embodiment of the present invention；
Fig. 4 is the structural schematic diagram for the charging accuracy diagnostic device for showing to be provided according to one embodiment of the invention；
Fig. 5 is the structural schematic diagram for showing charging accuracy diagnostic device according to another embodiment of the present invention；
Fig. 6 is the hardware architecture diagram for showing charging accuracy computing chip according to an embodiment of the invention；
Fig. 7 is the course of work schematic diagram for showing charging accuracy diagnosis according to an exemplary embodiment of the present invention.
Specific implementation mode
The feature and exemplary embodiment of various aspects of the invention is described more fully below, in order to make the mesh of the present invention
, technical solution and advantage be more clearly understood, with reference to the accompanying drawings and embodiments, the present invention is further retouched in detail
It states.It should be understood that specific embodiment described herein is only configured to explain the present invention, it is not configured as limiting the present invention.
To those skilled in the art, the present invention can be real in the case of some details in not needing these details
It applies.Below to the description of embodiment just for the sake of by showing that the example of the present invention is better understood from the present invention to provide.
It should be noted that herein, relational terms such as first and second and the like are used merely to a reality
Body or operation are distinguished with another entity or operation, are deposited without necessarily requiring or implying between these entities or operation
In any actual relationship or order or sequence.Moreover, the terms "include", "comprise" or its any other variant are intended to
Non-exclusive inclusion, so that the process, method, article or equipment including a series of elements is not only wanted including those
Element, but also include other elements that are not explicitly listed, or further include for this process, method, article or equipment
Intrinsic element.In the absence of more restrictions, the element limited by sentence " including ... ", it is not excluded that including
There is also other identical elements in the process, method, article or equipment of the element.
Rechargeable battery described in the embodiment of the present invention can be a plurality of types of electricity accumulating units, for example, the battery can be with
For lithium ion electricity accumulating unit, lead acid storage battery unit, nickel every electricity accumulating unit, ni-mh electricity accumulating unit, lithium sulphur electricity accumulating unit or sodium from
Sub- electricity accumulating unit.
It can deviate from it should be noted that the battery in the embodiment of the present invention can be anode and cathode and receive load energy grain
The battery, such as lithium ion battery etc. of son, do not limit herein.For scale, battery can be battery core monomer, can also be
Battery modules or battery pack, do not limit herein.
In embodiments of the present invention, can use the off-board conduction-type charger of electric vehicle (hereinafter referred to as charger or
Charging pile) it charges to vehicle-mounted rechargeable battery, in entire charging process, BMS passes through controller area network communication protocols
View is communicated with charging pile, is monitored to parameters such as the charging voltages, charging current and battery temperature of rechargeable battery, to whole
A charging process is managed.
In order to make it easy to understand, being introduced in the embodiment of the present invention using battery stake to dynamic below by an exemplary embodiment
The process that power battery charges.It should be noted that these embodiments are not for limiting the scope of the present disclosure.
In one embodiment, the process that power battery charges can be wrapped using charging pile in the embodiment of the present invention
It includes with the next stage：Physical connected phase, low pressure auxiliary power on, the handshake phase that charges, charge parameter configuration phase, the charging stage,
Charge ending phase.In each stage, charging pile and BMS notify the respective charged state of other side by the transmitting-receiving of message.
Physical connection in this embodiment completes the stage, and the charging gun of charging pile is inserted into the charging of vehicle to be charged
Mouthful, vehicle interface can have the latch functions to charging gun.
Low pressure in this embodiment assists the handshake phase that powers on and charge：Charging pile realizes Insulation monitoring, starts discharge
High pressure when resistance is by Insulation monitoring is discharged into given voltage value such as 60V hereinafter, also, the accessory power supply on charging pile is to wait for
BMS power supplies on charging vehicle, make BMS start to work, and data interaction is carried out between charging pile and BMS and is shaken hands.
Charge parameter configuration phase in this embodiment：Charging pile sends the message of maximum output ability, BMS to BMS
Judge whether to charge using the charging pile according to the maximum output ability of charging pile.As an example, if filled
The maximum output ability of electric stake is that can export 60A electric currents, when BMS asks 50A electric currents, then it represents that the existing maximum of charging pile is defeated
Output capacity can meet the request of BMS.
Charging stage in this embodiment：BMS and battery stake real-time Communication for Power send battery charge requirement ginseng to charging pile
Number, charging pile adjust output voltage and output current to ensure charging process in real time according to the battery charge requirement parameter received
Be normally carried out, and in charging process, charging pile and BMS mutually send respective status information.
As an example, the message that charging stage charging pile is sent with BMS real-time, interactives may include：Battery charging needs
Seek message (BCL), battery charges total state (BCS), charger charged state (CCS), power accumulator status information (BSM),
Monomer power accumulator voltage (BMV), power accumulator temperature (BMT), power accumulator reserve message (BSP), and BMS suspension is filled
Electric (BST), charger stop charging (CST).
In this embodiment, in charging ending phase：BMS reaches fully charged state or BMS receives " filling for charging pile transmission
It when electric stake termination charging " message, determines and meets end-of-charge condition, BMS sends " vehicle, which terminates, to charge " message；Charging pile reaches
The end-of-charge condition of operating personnel's setting, or " vehicle terminates charging " message of BMS transmissions is received, control charging pile stops
Charging.
The charging accuracy diagnostic method of the embodiment of the present invention can be applied to utilize charging pile described in above-described embodiment
Charging stage during charging to power battery.
In one embodiment, the charging stage of the embodiment of the present invention can be divided into constant-current charging phase and constant-voltage charge rank
Section.It in constant-current charging phase, is charged to power battery with constant charging current, with the progress of charging, power battery
SOC gradually increase, the charging voltage of power battery steps up, until the charging voltage value of power battery reaches preset perseverance
When the charging voltage threshold value in current charge stage, into constant voltage charging phase, in constant voltage charging phase, when charging voltage reaches stable
After value, charging current value can reduce according to certain rule.
In one embodiment, constant-current charging phase may include multiple constant-current charge sub-stages, with constant-current charge
Sub-stage is incremented by, and the corresponding charging current value of constant-current charge sub-stage can successively decrease, in charging process each constant current fill
The charging current in electronics stage remains unchanged.
In one embodiment, the charging stage of the embodiment of the present invention can also include the battery balanced stage.Due to power electric
The reasons such as individual difference, temperature difference during the use in pond cause battery terminal voltage uneven, in order to avoid this injustice
The deterioration of weighing apparatus trend can carry out equalizaing charge to battery, occur to avoid battery when power battery is not up to full state
Polarization phenomena.
In order to better understand the present invention, below in conjunction with attached drawing, charging essence according to the ... of the embodiment of the present invention is described in detail
Spend diagnostic method, it should be noted that these embodiments are not for limiting the scope of the present disclosure.
Fig. 1 is the flow chart for showing charging accuracy diagnostic method according to the ... of the embodiment of the present invention.As shown in Figure 1, of the invention
Method 100 in embodiment includes the following steps：
Step S110 obtains battery management system and asks electricity to charging pile in the specified charging stage of battery charging process
Request current value when stream.
In this step, as described in above-described embodiment, the specified charging stage may include constant-current charging phase, constant-voltage charge
Stage and battery balanced stage.
In one embodiment, according to the setting of practical charge requirement and charging flow, the specified charging stage can only wrap
Include constant-current charging phase and constant voltage charging phase.
In one embodiment, in step S110, in the specified charging stage of battery charging process, cell tube can be obtained
Request current value when reason system asks from drop electric current to charging pile.
Step S120 obtains the feedback current that charging pile is exported in response to the request of battery management system.
Step S130 calculates the output electricity in specified charging stage charging pile based on request current value and feedback current
Flow accuracy value.
Charging accuracy diagnostic method according to the ... of the embodiment of the present invention, can according to the request current value that is sent out based on BMS and
The feedback current of charging pile output calculates the output current accuracy value in specified charging stage charging pile, as charging accuracy
Diagnostic result, in charging process accurate judgement charging pile precision.
Fig. 2 is the detail flowchart for showing the charging accuracy diagnostic method according to the disclosure some exemplary embodiments,
Step identical or equivalent with Fig. 1 Fig. 2 uses identical label.As shown in Fig. 2, in one embodiment, step S120 is specific
May include：
In step S121, the maximum output current of charging pile and the charge mode of charging pile are determined.
In this step, the charge mode of charging pile may include single mold filling formula and group's punch die formula, and single mold filling formula indicates one
A charging pile is equipped with a charge port, and bicycle charging can only be carried out simultaneously using the charge port；Group's i.e. charging pile of mold filling formula
Be equipped with multiple charge ports, using multiple charge port can more vehicles charge simultaneously.
Due in more vehicles simultaneously under charging situation, it may occur that BMS ask with serious mismatch of charging pile output and but
Phenomenon of the vehicle still in charging normal, for the accuracy of charge safety and charging progress diagnosis, the embodiment of the present invention is filled
Electric Accuracy Diagnosis method is suitable for the BMS systems under single mold filling formula and charging pile.
In step S122, when the maximum output current of charging pile is more than or equal to request current value, and the charging of charging pile
When pattern is single mold filling formula, the request current value that battery management system asks to send when electric current to charging pile, and charging are obtained
The feedback current corresponding with request current value of stake output.
In one embodiment, when battery management system asks drop electric current to charging pile, battery management system is obtained to filling
The request current value sent when electric stake request drop electric current.
In this step, it is defeated to be more than or equal to the request current value expression existing maximum of charging pile for the maximum output current of charging pile
Output capacity can meet BMS request abilities, to be provided for the output current precision being calculated in charging accuracy diagnostic method
Data basis.
As an example, when the specified charging stage is constant-current charging phase, BMS is to the request that can be sent out with charging pile
Current value is more than 30A；When the specified charging stage is constant voltage charging phase or balance stage, BMS with charging pile to can be sent out
Request current value be less than 30A.
In one embodiment, in order to obtain relatively stable feedback current, which can charge
After staking receives the request for the drop electric current that BMS sends out, reach and obtain after preset output current delay time, and can be
BMS sends out the request of drop electric current every time, and charging pile output current calculates primary current precision after reaching the delay time.
In this embodiment, in the charging stage, BMS can send out charge requirement parameter in real time to charging pile, to charging pile
Electric current is asked, when asking electric current to decline, if when difference DELTA I≤20A of the bid value of request electric current and current flow, longest
Charging current can be adjusted to consistent with bid value within the T1 times, as Δ I>20A, longest can will fill within the T2 times
Electric current is adjusted to consistent with bid value.Wherein, T1 for example can be 1 second, and T2 for example can be Δ I ÷ DImin, and its
In, DIminIt can indicate minimum charge rate.
When in this embodiment, for calculating current precision, charging current has been stablized and has been adjusted to the life asked with BMS
Order value is consistent, ensures the accuracy calculated, can pre-set output current delay time Td, obtained after the delay time
The feedback current that charging pile is exported in response to the request of BMS, and the preset output current delay time TdIt can be more than
Equal to the maximum value in T1 and T2 in the embodiment.
In one embodiment, when the specified charging stage is constant-current charging phase, charging is calculated in above-mentioned steps S130
It the step of output current accuracy value of stake, can specifically include：
Step S131, the difference of computation requests current value and feedback current.
Step S132, using the ratio of difference and request current value as the output current accuracy value of the feedback current.
Specifically, when the specified charging stage is constant-current charging phase, it can be calculated and be fed back according to following expression formula (1)
The output current accuracy value of current value.
In above-mentioned expression formula (1), I1Indicate the request current value of BMS requests, I2Indicate charging pile response BMS request and
The feedback current of output, a% indicate the output current accuracy value for the charging pile that constant-current charging phase is calculated.
In another embodiment, equilibrium after the specified charging stage is constant voltage charging phase or constant voltage charging phase
When the stage, in above-mentioned steps S130 the step of the output current accuracy value of calculating charging pile, it can specifically include：
Step S133, the difference of computation requests current value and feedback current, and using difference as the defeated of feedback current
Go out current precision value.
It specifically, can be according to following expression when the specified charging stage is constant voltage charging phase or balance stage
Formula (2) calculates the output current accuracy value of feedback current.
B=I1-I2 (2)
In above-mentioned expression formula (2), I1Indicate the request current value of BMS requests, I2Indicate charging pile corresponding BMS requests and
The feedback current of output, b indicate the output current precision for the charging pile that constant voltage charging phase or balance stage are calculated
Value.
Fig. 3 is the detail flowchart for showing charging accuracy diagnostic method according to another embodiment of the present invention, Fig. 3 and figure
1 identical or equivalent step uses identical label.As shown in figure 3, charging accuracy diagnostic method 200 is substantially identical to charging essence
Diagnostic method 100 is spent, the difference is that, charging accuracy diagnostic method 300 further includes：
Whether step S140 judges the absolute value of output current accuracy value beyond corresponding in specified charging stage charging pile
Precision threshold generates warning message when the absolute value of output current accuracy value exceeds corresponding precision threshold.
In one embodiment, when the specified charging stage is constant-current charging phase, BMS is more than or equal to charging pile request
The charging current I of 30A1, charging pile output feedback current I2, charging pile current precision a% is calculated according to above-mentioned expression formula (1).
In this embodiment, if the current precision a% being calculated is unsatisfactory for the charging pile feedback of constant-current charging phase
Current standard is for example | a |>1, i.e., if a% exceed corresponding precision threshold range -1≤a≤1 when, basis | a | big your pupil
At corresponding warning message.
In this embodiment, it is constant-current charging phase in the specified charging stage, it can be all heavy after drop electric current every time is stablized
In multiple above-described embodiment the step of step S110 to S140, and in constant-current charging phase, request electric current I that BMS is sent out1
It is all higher than the request current threshold such as 30A equal to constant-current charging phase.
In one embodiment, when the specified charging stage is constant voltage charging phase or balance stage, BMS is to charging pile
Charging current I of the request less than 30A1, charging pile output feedback current I2, charging pile electric current essence is calculated according to above-mentioned expression formula (2)
Spend b.
In this embodiment, if the current precision b being calculated is unsatisfactory for constant voltage charging phase or balance stage
Charging pile feedback current standard is for example | b |>0.3, i.e., if when b exceeds corresponding precision threshold range -0.3≤b≤0.3,
According to | b | size generate corresponding warning message.
In this embodiment, it is constant voltage charging phase or balance stage in the specified charging stage, electricity can be dropped each
The step of stream is all repeated once step S110 to S140 in above-described embodiment after stablizing, and in constant voltage charging phase or equilibrium
Stage, the request electric current I that BMS is sent out1The request current threshold such as 30A of constant-current charging phase can be less than.
In one embodiment, warning message may include alarm code and menace level, and alarm code is for identification request electricity
The magnitude relationship of flow valuve and feedback current asks the difference of current value and feedback current bigger, and menace level is higher.
As an example, if feedback current is more than request current value, alarm code is that charging pile feedback current exceeds
Limitation；If feedback current is less than request current value, alarm code is that charging pile feedback current is too small.
In this example, constant-current charging phase, if request current value is more than feedback current, alarm code can be ' permanent
It is too small to flow stage current '；If current value is asked to be less than or equal to feedback current, alarm code can be that ' constant-current phase electric current is super
Go out limitation '.
In this example, constant voltage charging phase, if request current value is more than feedback current, alarm code can be ' permanent
Press stage current too small '；If current value is asked to be less than or equal to feedback current, alarm code can be that ' constant-voltage phase electric current is super
Go out limitation '.
In this example, balance stage, if request current value is more than feedback current, alarm code can be ' balanced rank
Section electric current is too small '；If current value is asked to be less than or equal to feedback current, alarm code can be that ' balance stage electric current is beyond limit
System '.
In this embodiment, the problem of charging pile may cause is determined according to the alarm code of different charging stages, such as overcharged,
Battery consistency difference etc., and can send out different instructions to charging pile according to warning message menace level, such as send out alarm signal
Number for example alarm sound signal or alarm light signal, or control charging pile stop charging etc..
Charging accuracy diagnostic method according to the ... of the embodiment of the present invention, in entire charging process BMS electric current can drop every time and
Charging pile output current calculates primary current precision after postponing, according to the feedback electricity of the request current value of BMS and charging pile
Flow valuve accurately calculates the output current accuracy value of different charging stage charging piles, if meeting national standard, can continue to charge,
It is such as unsatisfactory for national standard, chip defines alarm menace level by exceeding national standard value range and sends out alarm, provides corresponding diagnosis knot
Fruit, avoid battery pack overcharge, life time decay excessive velocities or the problems such as battery pack inconsistency, improve battery pack and use
Service life and safe to use.
Below in conjunction with the accompanying drawings, charging accuracy diagnostic device according to the ... of the embodiment of the present invention is discussed in detail.
Fig. 4 shows the structural schematic diagram of the charging accuracy diagnostic device provided according to one embodiment of the invention.Such as Fig. 4 institutes
Show, charging accuracy diagnostic device 400 may include：
Current value acquisition module 410 is asked, in the specified charging stage of battery charging process, obtaining battery management system
The request current value united when asking electric current to charging pile.
In one embodiment, request current value acquisition module 410, is additionally operable to the specified charging rank in battery charging process
Section obtains request current value when battery management system is asked to charging pile by electric current.
Also, feedback current is to reach preset output current delay after the request that charging pile receives drop electric current
It is obtained after time.
Feedback current acquisition module 420 is exported for obtaining charging pile in response to the request of battery management system
Feedback current；
Accuracy value computing module 430, for based on request current value and feedback current, calculating to be filled in the specified charging stage
The output current accuracy value of electric stake.
Charging accuracy diagnostic device is provided according to embodiments of the present invention, accurate judgement can be charged in battery charging process
The output current precision of stake.
In one embodiment, feedback current acquisition module 420, can specifically include：
Charging pile information acquisition unit, the charge mode of maximum output current and charging pile for determining charging pile；
Acquisition of information condition determining unit, for being more than or equal to request current value when the maximum output current of charging pile, and
And the charge mode of charging pile obtains battery management system and asks the request sent when electric current electricity to charging pile when being single mold filling formula
Flow valuve and the feedback current corresponding with request current value of charging pile output.
In one embodiment, acquisition of information condition determining unit is additionally operable to be more than when the maximum output current of charging pile
Equal to request current value, and when the charge mode of charging pile is single mold filling formula, obtains battery management system and asked to charging pile
The request current value sent when electric current and the feedback current corresponding with request current value of charging pile output drop.
In one embodiment, when the specified charging stage is constant-current charging phase, accuracy value computing module 430 specifically may be used
To include：
The extreme unit of first difference is used for the difference of computation requests current value and feedback current；First accuracy value calculates
Unit, for using the ratio of difference and request current value as the output current accuracy value of feedback current.
In another embodiment, equilibrium after the specified charging stage is constant voltage charging phase or constant voltage charging phase
When the stage, current precision value computing module 430 can specifically include：
Second difference computational unit is used for the difference of computation requests current value and feedback current；Second accuracy value calculates
Unit, for using difference as the output current accuracy value of feedback current.
Fig. 5 shows the structural schematic diagram of charging accuracy diagnostic device according to another embodiment of the present invention, Fig. 5 and Fig. 4
Identical or equivalent structure uses identical label.As shown in figure 5, Fig. 5 is essentially identical with Fig. 4, the difference is that, charging essence
Spending diagnostic device 400 can also include：
Warning message generation module 440, for judging the absolute value of output current accuracy value whether beyond in specified charging
Stage charging pile corresponding precision threshold when the absolute value of output current accuracy value exceeds corresponding precision threshold, generates alarm
Information.
In one embodiment, warning message includes alarm code and menace level, and alarm code is used for identification request current value
With the magnitude relationship of feedback current, ask the difference of current value and feedback current bigger, menace level is higher.
In one embodiment, if feedback current is more than request current value, alarm code is super for charging pile feedback current
Go out limitation；If feedback current is less than request current value, alarm code is that charging pile feedback current is too small.
Charging accuracy diagnostic device according to the ... of the embodiment of the present invention can accurately calculate the defeated of different charging stage charging piles
Go out current precision value, and alarm menace level can be defined simultaneously beyond national standard value range in the output current accuracy value of charging pile
Send out alarm, provide corresponding diagnostic result, avoid battery pack overcharge, life time decay excessive velocities or battery pack it is inconsistent
Property the problems such as, improve battery pack service life and safe to use.
It the other details of charging accuracy diagnostic device according to the ... of the embodiment of the present invention and is described above in association with Fig. 1 to Fig. 5
Charging accuracy diagnostic method according to the ... of the embodiment of the present invention is similar, and details are not described herein.
Fig. 6 shows the hardware architecture diagram of charging accuracy computing chip according to an embodiment of the invention.
As shown in fig. 6, computing chip 600 includes input equipment 601, input interface 602, central processing unit 603, memory
604, output interface 605 and output equipment 606.Wherein, input interface 602, central processing unit 603, memory 604 and
Output interface 605 is connected with each other by bus 610, and input equipment 601 and output equipment 606 pass through 602 He of input interface respectively
Output interface 605 is connect with bus 610, and then is connect with the other assemblies of computing device 600.Specifically, input equipment 601 connects
It receives the input information from external (for example, charging pile output interface), and is transmitted to input information by input interface 602
Central processor 603；Central processing unit 603 carries out input information based on the computer executable instructions stored in memory 604
Output information is temporarily or permanently stored in the memory 604 to generate output information, then passes through output interface by processing
Output information is transmitted to output equipment 606 by 605；Output information is output to the external of computing device 600 and supplied by output equipment 606
User uses.
That is, computing chip shown in fig. 6 can also be implemented as include：It is stored with computer executable instructions
Memory；And processor, the processor may be implemented when executing computer executable instructions that Fig. 1 to Fig. 5 to be combined to describe
Charging accuracy diagnostic method and device.Here, the processor in chip can be with battery management system and mounted on power electric
Current sensor communication on pond, to execute meter based on the relevant information from battery management system and/or current sensor
Calculation machine executable instruction, to realize in conjunction with Fig. 1 to Fig. 5 charging accuracy diagnostic methods described and device
Fig. 7 shows the course of work schematic diagram of charging accuracy diagnosis according to an exemplary embodiment of the present invention.Such as Fig. 7 institutes
Show, can send message by CAN communication interface between BMS and charging pile is communicated, and can be led between charging pile and chip
It crosses data-interface and carries out data interaction.
In the figure 7, the course of work of charging accuracy diagnosis for example may include steps of
Step S01, BMS send out the request current value of demand to charging pile.
Step S02, charging pile respond the electric current request of BMS, export feedback current.
Step S03, chip obtains the request current value and the feedback current, according to the charging accuracy in above-described embodiment
Current precision value is calculated in diagnosis.
Step S04, in the specified charging stage of charging process, when current precision is unsatisfactory for corresponding national standard, chip judges
Corresponding alarm code and menace level.
Step S05, chip make command adapted thereto according to corresponding alarm code and menace level to battery, and command adapted thereto includes
The alert of charging pile or executing instruction for the charging pile, such as stopping charging etc. is generated to execute instruction.
Step S06, charging pile execute the command adapted thereto received according to command adapted thereto is received.
In embodiments of the present invention, can be with burning computer program in the computing chip, and the calculating is executed by operation
Machine program, to execute the charging accuracy diagnostic method in above-described embodiment.
In another embodiment, computing chip can be integrated in the processing system of charging pile by this, and passes through number
It is transmitted data according to circuit and charging pile.
In one embodiment, charging stake body can have reserved chip interface, before charging, chip be inserted into and with fill
Electric stake successful connection, charging pile and BMS smoothly complete physical connection complete, low pressure auxiliary power on, the handshake phase that charge, charge
After the parameter configuration stage, the message of charging stage is obtained, according to the alternating current calculating current precision of charging pile and BMS, and only
Have and calculates primary current precision after electric current drops in entire charging process BMS every time and charging pile output current postpones, if
Meet national standard, then continue to charge, be such as unsatisfactory for national standard, chip is defined alarm menace level by exceeding national standard value range and sent out
Alarm, obtains accurate diagnostic result and targetedly treatment measures.
In the above-described embodiments, can come wholly or partly by software, hardware, firmware or its arbitrary combination real
It is existing.It when implemented in software, can be entirely or partly with the shape of computer program product or computer readable storage medium
Formula is realized.The computer program product or computer readable storage medium include one or more computer instructions.It is calculating
When being loaded on machine and executing the computer program instructions, entirely or partly generate according to the flow described in the embodiment of the present invention
Or function.The computer can be all-purpose computer, special purpose computer, computer network or other programmable devices.Institute
Stating computer instruction can store in a computer-readable storage medium, or from a computer readable storage medium to another
A computer readable storage medium transmission, for example, the computer instruction can be from web-site, computer, a server
Or data center is (such as infrared, wireless, micro- by wired (such as coaxial cable, optical fiber, Digital Subscriber Line (DSL)) or wireless
Wave etc.) mode is transmitted to another web-site, computer, server or data center.The computer-readable storage
Medium can be the service that any usable medium that computer can access either is integrated comprising one or more usable mediums
The data storage devices such as device, data center.The usable medium can be magnetic medium, (for example, floppy disk, hard disk, tape), light
Medium (for example, DVD) or semiconductor medium (such as solid state disk Solid State Disk (SSD)) etc..
It should be clear that the invention is not limited in specific configuration described above and shown in figure and processing.
For brevity, it is omitted here the detailed description to known method.In the above-described embodiments, several tools have been described and illustrated
The step of body, is as example.But procedure of the invention is not limited to described and illustrated specific steps, this field
Technical staff can be variously modified, modification and addition after the spirit for understanding the present invention, or suitable between changing the step
Sequence.
The above description is merely a specific embodiment, it is apparent to those skilled in the art that,
For convenience of description and succinctly, the system, module of foregoing description and the specific work process of unit can refer to preceding method
Corresponding process in embodiment, details are not described herein.It should be understood that scope of protection of the present invention is not limited thereto, it is any to be familiar with
Those skilled in the art in the technical scope disclosed by the present invention, can readily occur in various equivalent modifications or substitutions,
These modifications or substitutions should be covered by the protection scope of the present invention.
Claims (14)
1. a kind of charging accuracy diagnostic method, which is characterized in that the charging accuracy diagnostic method includes：
In the specified charging stage of battery charging process, request electric current when battery management system asks electric current to charging pile is obtained
Value；
Obtain the feedback current that the charging pile is exported in response to the request of the battery management system；
Based on the request current value and the feedback current, the output of the charging pile described in the specified charging stage is calculated
Current precision value.
2. charging accuracy diagnostic method according to claim 1, which is characterized in that it is described obtain the charging pile in response to
The request of the battery management system and the feedback current exported, including：
Determine the charge mode of the maximum output current and the charging pile of the charging pile；
When the maximum output current of the charging pile is more than or equal to the request current value, and the charge mode of the charging pile
For single mold filling formula when, obtain the request current value that sends and the charging when battery management system asks electric current to charging pile
The feedback current corresponding with the request current value of stake output.
3. charging accuracy diagnostic method according to claim 1, which is characterized in that
The feedback current is to reach default after the charging pile receives the battery management system to the request of electric current
Output current delay time after obtain.
4. charging accuracy diagnostic method according to claim 1, which is characterized in that when the specified charging stage be constant current
It is described to be based on the request current value and the feedback current when charging stage, it calculates described in the specified charging stage
The output current accuracy value of charging pile, including：
Calculate the difference of the request current value and the feedback current；
Ask the ratio of current value as the output current accuracy value of the feedback current with described the difference.
5. charging accuracy diagnostic method according to claim 1, which is characterized in that when the specified charging stage be constant pressure
It is described to be based on the request current value and the feedback current when balance stage after charging stage or constant voltage charging phase
Value calculates the output current accuracy value of the charging pile described in the specified charging stage, including：
The difference of the request current value and the feedback current is calculated, and using the difference as the feedback current
Output current accuracy value.
6. charging accuracy diagnostic method according to claim 1, which is characterized in that the charging accuracy diagnostic method also wraps
It includes：
Judge whether the absolute value of the output current accuracy value is corresponding beyond the charging pile described in the specified charging stage
Precision threshold when the absolute value of the output current accuracy value exceeds the corresponding precision threshold, generates warning message.
7. charging accuracy diagnostic method according to claim 6, which is characterized in that
The warning message includes alarm code and menace level, the alarm code for identify the request current value and it is described instead
The magnitude relationship of flow valuve is fed, the difference for asking current value and the feedback current is bigger, and the menace level is higher.
8. a kind of charging accuracy diagnostic device, which is characterized in that the charging accuracy diagnostic device includes：
Current value acquisition module is asked, in the specified charging stage of battery charging process, obtaining battery management system to filling
Request current value when electric stake request electric current；
Feedback current acquisition module is exported for obtaining the charging pile in response to the request of the battery management system
Feedback current；
Accuracy value computing module is calculated for being based on the request current value and the feedback current in the specified charging
The output current accuracy value of charging pile described in stage.
9. charging accuracy diagnostic device according to claim 8, which is characterized in that the feedback current acquisition module,
Including：
Charging pile information acquisition unit, the charging mould of maximum output current and the charging pile for determining the charging pile
Formula；
Acquisition of information condition determining unit is more than or equal to the request electric current for the maximum output current when the charging pile
Value, and when the charge mode of the charging pile is single mold filling formula, obtains battery management system and ask to send out when electric current to charging pile
The request current value sent and the feedback current corresponding with the request current value of charging pile output.
10. charging accuracy diagnostic device according to claim 8, which is characterized in that
The feedback current is to reach default after the charging pile receives the battery management system to the request of electric current
Output current delay time after obtain.
11. charging accuracy diagnostic device according to claim 8, which is characterized in that when the specified charging stage be perseverance
When the current charge stage, the accuracy value computing module, including：
The extreme unit of first difference, the difference for calculating the request current value and the feedback current；
First accuracy value computing unit, for asking the ratio of current value as the feedback current with described the difference
Output current accuracy value.
12. charging accuracy diagnostic device according to claim 8, which is characterized in that when the specified charging stage be perseverance
When pressing the balance stage after charging stage or constant voltage charging phase, the current precision value computing module, including：
The extreme unit of second difference, the difference for calculating the request current value and the feedback current；
Second accuracy value computing unit, for using the difference as the output current accuracy value of the feedback current.
13. charging accuracy diagnostic device according to claim 8, which is characterized in that the charging accuracy diagnostic device is also
Including：
Warning message generation module, for judging the absolute value of the output current accuracy value whether beyond in the specified charging
The absolute value of the corresponding precision threshold of charging pile described in stage, the output current accuracy value exceeds the corresponding precision threshold
When, generate warning message.
14. a kind of charging accuracy diagnosing chip, which is characterized in that including storage circuit and processing circuit；
The storage circuit is for storing executable program code；
The processing circuit is used to read the executable program code stored in the storage circuit and requires 1 to 7 with perform claim
Any one of described in charging accuracy diagnostic method.
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