CN107064608B - For diagnosing the method and system of cell voltage wrong report - Google Patents
For diagnosing the method and system of cell voltage wrong report Download PDFInfo
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- CN107064608B CN107064608B CN201710137866.0A CN201710137866A CN107064608B CN 107064608 B CN107064608 B CN 107064608B CN 201710137866 A CN201710137866 A CN 201710137866A CN 107064608 B CN107064608 B CN 107064608B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
- G01R19/16533—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the application
- G01R19/16538—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the application in AC or DC supplies
- G01R19/16542—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the application in AC or DC supplies for batteries
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
- G01R19/16566—Circuits and arrangements for comparing voltage or current with one or several thresholds and for indicating the result not covered by subgroups G01R19/16504, G01R19/16528, G01R19/16533
- G01R19/16576—Circuits and arrangements for comparing voltage or current with one or several thresholds and for indicating the result not covered by subgroups G01R19/16504, G01R19/16528, G01R19/16533 comparing DC or AC voltage with one threshold
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
Abstract
The invention discloses the method and system for diagnosing cell voltage wrong report, and the method comprising the steps of: the real-time voltage data for obtaining at least one batteries of electric automobile are monitored using electric voltage observation circuit；According to the real-time voltage data of acquisition, calculates and form corresponding voltage change curve figure；According to the voltage change curve figure of acquisition, it is compared with standard database, and then judge whether there is gross differences；When judgement is there are when gross differences, progress voltage wrong report record generates and sends corresponding error information.The present invention can be used for diagnosing the voltage of battery with the presence or absence of wrong report phenomenon; it can effectively judge whether the monitoring circuit of battery is working normally simultaneously; and then it limits the charge volume of battery or stops charging; play the role of protecting battery; to improve the safety of battery pack; support personnel and vehicle safety, can be widely applied in electric car industry.
Description
Technical field
The present invention relates to Battery Diagnostic fields, more particularly to a kind of method for diagnosing cell voltage wrong report and are
System.
Background technique
Name is explained:
SOC: full name is State of Charge, and state-of-charge is also remaining capacity, and representative is that battery uses one section
Time or for a long time lie idle after residual capacity and its fully charged state capacity ratio, commonly use percentage indicate；
Internal-combustion engines vehicle still occupies a very big ratio now.Fossil fuel, that is, gasoline is depended on using this
Automobile, there are two problems.First, since the limited scale of gasoline and region supply, the fluctuation of gas price, price generally rise
Trend, can offset water wasting and show no increases in output raw more theatrical influence.Second, combustion of fossil fuel is greenhouse gases --- dioxy
Change one of the main source of carbon, it is considered to be one of significant contributor of global warming.Therefore, people are striving to find new energy
Source automobile.Electric car is exactly the most promising oil-engine driven vehicle of substitution.Electric car generally comprises battery, electricity
Pond observation circuit, the propulsion electric machine for converting battery energy into mechanical movement, the electricity for being driven to propulsion electric machine
Machine controller, the speed changer connecting with propulsion electric machine, there are also carry out the vehicle management system that vehicle integrally controls to electric car
Deng.Wherein, battery is one of the main component of electric drive and energy storage, and one of battery is important advantage is that be accurately to supervise
It surveys cell voltage and calculates its SOC to judge whether it breaks down.But, the wrong report of this type of information will lead to voltage beyond limit
Value, efficiency reduce, energy is insufficient or superfluous, in some cases, or even can cause on fire or explosion, therefore, it is necessary to its into
Row monitoring finds that cell voltage reports situation by mistake in time.
Summary of the invention
In order to solve the above technical problems, the object of the present invention is to provide for diagnose cell voltage wrong report method,
It is a further object of the present invention to provide a kind of systems for cell voltage wrong report.
The technical solution adopted by the present invention to solve the technical problems is:
Method for diagnosing cell voltage wrong report, comprising steps of
The real-time voltage data for obtaining at least one batteries of electric automobile are monitored using electric voltage observation circuit；
According to the real-time voltage data of acquisition, calculates and form corresponding voltage change curve figure；
It according to the voltage change curve figure of acquisition, is compared, and then judges whether there is great inclined with standard database
Difference；
When judgement is there are when gross differences, progress voltage wrong report record generates and sends corresponding error information.
Further, the voltage change curve figure includes relational graph between the derivative of current versus time and voltage, voltage
Relational graph between battery SOC.
Further, the voltage change curve figure according to acquisition, is compared, and then judge whether with standard database
The step of there are gross differences, specifically includes:
The battery types of batteries of electric automobile to be measured are obtained, and then it is corresponding to obtain in standard database the battery types
Normal voltage change curve；
The voltage change curve figure of acquisition is compared with the normal voltage change curve, and then is judged whether there is
Gross differences.
Further, the voltage change curve figure by acquisition is compared with the normal voltage change curve, in turn
The step of judging whether there is gross differences, specifically:
Area under the curve of the voltage change curve figure obtained within the scope of certain voltage is calculated, by itself and the standard electric
The correspondence scalar quantity of pressure change curve is compared, to judge whether there is significant error.
Further, the method also includes following steps:
For every kind of battery types, multiple batteries is selected to carry out charge-discharge test, and then is monitored using electric voltage observation circuit
Obtain the real-time voltage data of multiple batteries；
After the real-time voltage data of multiple batteries of acquisition are averaged, the corresponding standard electric of the battery types is formed
Press change curve；
Standard database is constituted according to the normal voltage change curve of different battery types.
Further, the method also includes following steps:
The case where vehicle management system of electric car is in response to receiving error information executes following operation:
The battery voltage value that adjustment cell-monitoring circuit is monitored；
And/or
It limits the charge volume to battery or stops charging to battery.
Another technical solution adopted by the present invention to solve the technical problem thereof is that:
System for diagnosing cell voltage wrong report, comprising:
Data acquisition module, for obtaining the real-time voltage for the batteries of electric automobile for using electric voltage observation circuit monitoring to obtain
Data；
Computing module calculates for the real-time voltage data according to acquisition and forms corresponding voltage change curve figure；
Comparison module is compared for the voltage change curve figure according to acquisition with standard database, and then judgement is
It is no that there are gross differences；
Diagnostic module, for when judgement is there are when gross differences, progress voltage wrong report record to generate and sends corresponding report
Wrong information.
Further, the comparison module, specifically includes:
First submodule is obtained for obtaining the battery types of batteries of electric automobile to be measured, and then in standard database
The corresponding normal voltage change curve of the battery types；
Second submodule, for the voltage change curve figure of acquisition to be compared with the normal voltage change curve,
And then judge whether there is gross differences.
Further, the second submodule is specifically used for:
Area under the curve of the voltage change curve figure obtained within the scope of certain voltage is calculated, by itself and the standard electric
The correspondence scalar quantity of pressure change curve is compared, to judge whether there is significant error.
Further, the system also includes initialization module, the initialization module includes:
First unit selects multiple batteries to carry out charge-discharge test, and then use voltage for being directed to every kind of battery types
Monitoring circuit monitors obtain the real-time voltage data of multiple batteries；
Second unit forms the battery types after the real-time voltage data of the multiple batteries obtained are averaged
Corresponding normal voltage change curve；
Third unit, for constituting standard database according to the normal voltage change curve of different battery types.
The beneficial effects of the present invention are: the method for diagnosing cell voltage wrong report of the invention, comprising steps of using electricity
Pressure monitoring circuit monitors obtain the real-time voltage data of at least one batteries of electric automobile；According to the real-time voltage data of acquisition,
It calculates and forms corresponding voltage change curve figure；According to the voltage change curve figure of acquisition, it is compared with standard database,
And then judge whether there is gross differences；When judgement is there are when gross differences, progress voltage wrong report record generates and sends correspondence
Error information.This method can be used for diagnosing the voltage of battery with the presence or absence of wrong report phenomenon, while can effectively judge battery
Monitoring circuit whether working normally, even if all monitoring circuits, protection circuit when failing, as long as voltage wrong report occurs,
It can monitor wrong report information, and then limit the charge volume of battery or stop charging, play the role of protecting battery, to improve
The safety of battery pack, support personnel and vehicle safety.
The beneficial effects of the present invention are: the system for diagnosing cell voltage wrong report of the invention, comprising: data acquisition mould
Block, for obtaining the real-time voltage data for the batteries of electric automobile for using electric voltage observation circuit monitoring to obtain；Computing module is used for
According to the real-time voltage data of acquisition, calculates and form corresponding voltage change curve figure；Comparison module, for according to acquisition
Voltage change curve figure, is compared with standard database, and then judges whether there is gross differences；Diagnostic module, for working as
Judgement generates there are voltage wrong report record when gross differences, is carried out and sends corresponding error information.This system can be used for examining
The voltage in pond is powered off with the presence or absence of wrong report phenomenon, while can effectively judge whether the monitoring circuit of battery is working normally, i.e.,
When all monitoring circuits, protection circuit being made to fail, as long as voltage wrong report occurs, wrong report information can be monitored, and then limit
The charge volume of battery stops charging, plays the role of protecting battery, to improve the safety of battery pack, support personnel and whole
Vehicle safety.
Detailed description of the invention
Present invention will be further explained below with reference to the attached drawings and examples.
Fig. 1 is the structural schematic diagram of electric car built-in system；
Fig. 2 is the flow chart of the method for diagnosing cell voltage wrong report of the invention；
Fig. 3 is that the OCV-SOC between the open-circuit voltage and SOC of the displaying battery behavior that the specific embodiment of the invention obtains is bent
Line relational graph；
Fig. 4 is the derivative dV/dt and voltage of the current versus time for the displaying battery behavior that the specific embodiment of the invention obtains
Between dV/dt-V curve relation figure；
Fig. 5 is the structural block diagram of the system for diagnosing cell voltage wrong report of the invention.
Appended drawing reference in Fig. 1: 102, electric car, 104, battery, 106, propulsion electric machine, 108, electric machine controller, 110,
Speed changer, 112, wheel, 116, vehicle management system, 118, external power supply (such as charging pile), 120, cell-monitoring circuit,
122, plant-grid connection module.
Specific embodiment
Referring to Fig.1, Fig. 1 illustrates the structure chart of current electric car built-in system, firstly, in the electric car of Fig. 1
Portion's structure is described in detail.In the structure of Fig. 1, cell-monitoring circuit 120 is provided separately with battery 104, in practical application, electricity
Pond observation circuit 120 is built-in into battery 104.
Battery can be divided into many types class, including but not limited to ternary lithium, LiFePO4, ni-Cd, ni-mh, plumbic acid etc..This
The battery 104 that text refers to is made of in parallel and serial multiple lithium ion batteries, provides the battery pack of about 390V voltage.
Electric machine controller 108 is one and is transformed at least one propulsion electric machine 106 energy from battery 104 and pushes electricity
The system of electrical automobile, including one or more field effect transistors, Metal Oxide Semiconductor Field Effect Transistor, one or more
A insulated gate bipolar transistor.The purposes of electric machine controller 108 has following several: first, receive the direct current from battery 104
DC power signal, and a three-phase alternating current AC signal is exported to drive automobile propulsion motor 106；Second, vehicle propulsion will be come from
One three-phase signal of motor 106 is converted to the dc power being stored in battery 104；Third converts energy from battery 104
At the propulsion electric machine 106 other than electrical load.
Propulsion electric machine 106 can be one or more three-phase alternating current propulsion electric machines.
Speed changer 110 divides for following several classes: manual transmission MT, automatic transmission AT, automatic mechanical transmission AMT,
Dual-clutch transmission DCT, mechanical continuously-variable transmission CVT.
Vehicle management system 116 is used to carry out vehicle to electric car integrally to control, and can give one or more battery 104
Control is provided with electric machine controller 108, cell-monitoring circuit 120 is also may be coupled to or the relevant Vehicular system of safety such as touches
It hits in sensor, ABS anti-lock braking system etc., may be also connected to the input such as speed changer of one or more drivers or adds
Fast device.
External energy 118, such as charging pile can supply energy to battery 104 by plant-grid connection module 122.Charging pile
Electric energy is stored into battery 104 from 220V AC power source.
Embodiment one
Referring to Fig. 2, the present invention provides a kind of methods for diagnosing cell voltage wrong report, comprising steps of
The real-time voltage data for obtaining at least one batteries of electric automobile are monitored using electric voltage observation circuit；
According to the real-time voltage data of acquisition, calculates and form corresponding voltage change curve figure；
It according to the voltage change curve figure of acquisition, is compared, and then judges whether there is great inclined with standard database
Difference；
When judgement is there are when gross differences, progress voltage wrong report record generates and sends corresponding error information.
The error information of transmission can be the value that one represents error information or a signal, to show battery detecting
There is the phenomenon that wrong report battery charge state information in circuit.
In this method, there is the case where multiple batteries in electric car when applying, then use multiple voltage detecting circuit structures
At multiple circuits, each circuit is performed both by acquisition in this method, calculates step, can be summarised in a total circuit
In, execute comparison, diagnosis algorithm.In addition, any battery breaks down when being monitored to multiple batteries, this method can
Corresponding error information is sent to be alerted.
It, can in the step of monitoring the real-time voltage data for obtaining at least one batteries of electric automobile using electric voltage observation circuit
To be constancy or periodically be detected to the voltage of battery.
It is further used as preferred embodiment, in the present embodiment, the voltage change curve figure includes current versus time
Derivative dV/dt and voltage between relational graph, the relational graph between voltage and battery SOC.Fig. 3 illustrate open-circuit voltage with
OCV-SOC curve relation figure between SOC, during the charge or discharge of battery, monitoring battery is corresponding at different SOC
Open-circuit voltage.May be different with the OCV-SOC curve of other batteries from this corresponding battery of OCV-SOC curve, even, sameization
The battery for learning type, is also not quite similar.For battery in a constant-current charge (or electric discharge), it is constant that SOC, which changes with time,.
Fig. 4 illustrates the relational graph between the derivative dV/dt of current versus time and voltage --- dV/dt-V curve, for just the same
Chemical component battery between, dV/dt-V curve should be substantially similar, and the difference of dV/dt-V curve can embody
Whether there are the wrong report of cell voltage and the variation of SOC out.The size of dV/dt numerical value, it is meant that the speed of voltage change, along electricity
The variation of the dV/dt numerical value of last item embodies each voltage and corresponds to a dV/dt numerical value.With this numerical value contrast standard
DV/dt-V curve, if the result of comparison is beyond the limit value in allowed band, it is meant that the generation for thering is a voltage to report by mistake.
The result of this " comparison " generates between actual dV/dt-V curve and the dV/dt-V curve of standard.
For the SOC of comparative cell and the difference of standard database (database can also be formed by the data of other batteries)
It is different, need more calculated results.For example, dV/dt-V curve area below can be calculated within the scope of certain voltage,
And then a scalar quantity is generated come for comparing.Different dV/dt-V curve areas below in more same voltage range, can
To determine whether to produce the wrong report or the difference of capacity of voltage.
It is further used as preferred embodiment, in the present embodiment, the voltage change curve figure according to acquisition, with mark
Quasi- database is compared, and then the step of judging whether there is gross differences, is specifically included:
The battery types of batteries of electric automobile to be measured are obtained, and then it is corresponding to obtain in standard database the battery types
Normal voltage change curve；
The voltage change curve figure of acquisition is compared with the normal voltage change curve, and then is judged whether there is
Gross differences.
Here, gross differences are mainly to be determined by predetermined deviation threshold value, are more than the predetermined deviation threshold value, then it represents that
There are gross differences.Its determination standard can be based on used battery types or battery configuration.Different types of battery (three
Member, LiFePO4, ni-Cd, nickel-metal hydride battery, plumbic acid or other), acceptable tolerance may be different.Different configurations
Battery (series, parallel, string and combine or other) the acceptable franchise that may change.If without gross differences, substantially
It can determine and not report generation by mistake.If it find that there is gross differences, it will issue an error information.In general, one wrong report
Information refers to the information that cell-monitoring circuit reports cell voltage by mistake and issues, in other words, if actual cell voltage is X,
Cell-monitoring circuit monitors that X ± Y is also possible that.However, if it find that battery charge state data and standard database
It compares, there are the number amount and type that can determine its wrong report beyond the gross differences in its allowed band.
It is further used as preferred embodiment, the voltage change curve figure by acquisition and normal voltage variation are bent
Line chart is compared, and then the step of judging whether there is gross differences, specifically:
Area under the curve of the voltage change curve figure obtained within the scope of certain voltage is calculated, by itself and the standard electric
The correspondence scalar quantity of pressure change curve is compared, to judge whether there is significant error.
As previously mentioned, generating when judgement is there are voltage wrong report record when gross differences, is carried out and sending the corresponding letter that reports an error
Breath.Here, the error information of transmission can be the value or a signal that one represents error information, to show battery detecting
There is the phenomenon that wrong report battery charge state information in circuit.When determined one wrong report generation, it will issue one report an error
Information.This error information may be the signal communicated between diagnostic system or other systems；It may also can be transmitted to and fill
Electric system causes it to limit the charge volume of battery, even, directly results in it and stops charging to battery.This is a series of as a result, will
The information that can be presented to the user is: battery is needed to safeguard, be checked.In addition, this error information for carrying out self-diagnosable system may
Other circuits (such as vehicle management system) can be allowed to compensate the relevant parameter of this wrong report.For example, if cell-monitoring circuit monitors
It is 3.6V to cell voltage, and virtual voltage is 3.8V, this voltage signal can be diagnosed into wrong report, and then compensate 0.2V, carry out
Relevant revision program.
As described above, the SOC of a certain battery and standard database are compared, this battery and other batteries can be shown
Between SOC difference.The variation of SOC reflects the charging and discharging state of a battery or battery pack.Therefore, the meter of mileage and SOC
Calculating (submitting to user's) will receive the influence such as charging and discharging state, capacity, temperature of battery pack.When judging the letter that reports an error
Breath or wrong report, can recalculate mileage and SOC, provide the user with more accurate information.
Standard database can be the composition of the charging and discharging state data based on ideal electrochemical cell, be also possible to based on multiple
What the average value of battery was constituted, standard database includes the corresponding normal voltage change curve of different battery types.Based on reason
When thinking electrochemical cell, the real-time voltage data composition during the charge-discharge test of ideal electrochemical cell at a certain temperature is directly acquired
Normal voltage change curve.Using multiple batteries average value when, need to increase initialization procedure, the method is also wrapped
Include following steps:
For every kind of battery types, multiple batteries is selected to carry out charge-discharge test, and then is monitored using electric voltage observation circuit
Obtain the real-time voltage data of multiple batteries；
After the real-time voltage data of multiple batteries of acquisition are averaged, the corresponding standard electric of the battery types is formed
Press change curve；
Standard database is constituted according to the normal voltage change curve of different battery types.
It is further used as preferred embodiment, the method also includes following steps:
The case where vehicle management system of electric car is in response to receiving error information executes following operation:
The battery voltage value that adjustment cell-monitoring circuit is monitored；
And/or
It limits the charge volume to battery or stops charging to battery.
This method can be used for diagnosing the voltage of battery with the presence or absence of wrong report phenomenon, while can effectively judge the prison of battery
Whether control circuit is working normally,, can as long as voltage wrong report occurs even if all monitoring circuits, protection circuit fail
It monitors wrong report information, and then limits the charge volume of battery or stop charging, play the role of protecting battery, to improve battery
The safety of packet, support personnel and vehicle safety.
Embodiment two
Referring to Fig. 5, the present invention also provides a kind of systems for diagnosing cell voltage wrong report, comprising:
Data acquisition module, for obtaining the real-time voltage for the batteries of electric automobile for using electric voltage observation circuit monitoring to obtain
Data；
Computing module calculates for the real-time voltage data according to acquisition and forms corresponding voltage change curve figure；
Comparison module is compared for the voltage change curve figure according to acquisition with standard database, and then judgement is
It is no that there are gross differences；
Diagnostic module, for when judgement is there are when gross differences, progress voltage wrong report record to generate and sends corresponding report
Wrong information.
It is further used as preferred embodiment, the comparison module specifically includes:
First submodule is obtained for obtaining the battery types of batteries of electric automobile to be measured, and then in standard database
The corresponding normal voltage change curve of the battery types；
Second submodule, for the voltage change curve figure of acquisition to be compared with the normal voltage change curve,
And then judge whether there is gross differences.
It is further used as preferred embodiment, the second submodule is specifically used for:
Area under the curve of the voltage change curve figure obtained within the scope of certain voltage is calculated, by itself and the standard electric
The correspondence scalar quantity of pressure change curve is compared, to judge whether there is significant error.
It is further used as preferred embodiment, the system also includes initialization module, the initialization module includes:
First unit selects multiple batteries to carry out charge-discharge test, and then use voltage for being directed to every kind of battery types
Monitoring circuit monitors obtain the real-time voltage data of multiple batteries；
Second unit forms the battery types after the real-time voltage data of the multiple batteries obtained are averaged
Corresponding normal voltage change curve；
Third unit, for constituting standard database according to the normal voltage change curve of different battery types.
The present embodiment is for realizing the system of the method for embodiment one, and detail is similar with embodiment one.Carrying
This system can be a computer, further include corresponding input module, display including the primary processor for carrying this system
Module, memory module, communication module etc..
It is to be illustrated to preferable implementation of the invention, but the invention is not limited to the implementation above
Example, those skilled in the art can also make various equivalent variations on the premise of without prejudice to spirit of the invention or replace
It changes, these equivalent variation or replacement are all included in the scope defined by the claims of the present application.
Claims (8)
1. the method for diagnosing cell voltage wrong report, which is characterized in that comprising steps of
The real-time voltage data for obtaining at least one batteries of electric automobile are monitored using electric voltage observation circuit；
According to the real-time voltage data of acquisition, calculates and form corresponding voltage change curve figure；
According to the voltage change curve figure of acquisition, it is compared with standard database, and then judge whether there is gross differences；
When judgement is there are when gross differences, progress voltage wrong report record generates and sends corresponding error information；
The voltage change curve figure according to acquisition, is compared with standard database, and then judges whether there is great inclined
The step of difference, specifically includes:
The battery types of batteries of electric automobile to be measured are obtained, and then obtain the corresponding standard of the battery types in standard database
Voltage change curve figure；
The voltage change curve figure of acquisition is compared with the normal voltage change curve, and then is judged whether there is great
Deviation.
2. the method according to claim 1 for diagnosing cell voltage wrong report, which is characterized in that the voltage change is bent
Line chart includes the relational graph between relational graph, voltage and battery SOC between the derivative of current versus time and voltage.
3. the method according to claim 1 for diagnosing cell voltage wrong report, which is characterized in that the electricity by acquisition
Pressure change curve is compared with the normal voltage change curve, and then the step of judging whether there is gross differences,
Specifically:
Area under the curve of the voltage change curve figure obtained within the scope of certain voltage is calculated, by itself and the standard electric buckling
The correspondence scalar quantity for changing curve graph is compared, to judge whether there is significant error.
4. the method according to claim 1 for diagnosing cell voltage wrong report, which is characterized in that the method also includes
Following steps:
For every kind of battery types, multiple batteries is selected to carry out charge-discharge test, and then is obtained using electric voltage observation circuit monitoring
The real-time voltage data of multiple batteries；
After the real-time voltage data of multiple batteries of acquisition are averaged, the corresponding standard electric buckling of the battery types is formed
Change curve graph；
Standard database is constituted according to the normal voltage change curve of different battery types.
5. the method according to claim 1 for diagnosing cell voltage wrong report, which is characterized in that the method also includes
Following steps:
The case where vehicle management system of electric car is in response to receiving error information executes following operation: adjustment battery prison
The battery voltage value that slowdown monitoring circuit is monitored；
And/or
It limits the charge volume to battery or stops charging to battery.
6. the system for diagnosing cell voltage wrong report characterized by comprising
Data acquisition module, for obtaining the real-time voltage number for the batteries of electric automobile for using electric voltage observation circuit monitoring to obtain
According to；
Computing module calculates for the real-time voltage data according to acquisition and forms corresponding voltage change curve figure；
Comparison module is compared for the voltage change curve figure according to acquisition with standard database, and then judges whether to deposit
In gross differences；
Diagnostic module, for when judgement is there are when gross differences, progress voltage wrong report record to generate and sends the corresponding letter that reports an error
Breath；
The comparison module, specifically includes:
First submodule for obtaining the battery types of batteries of electric automobile to be measured, and then obtains the electricity in standard database
The corresponding normal voltage change curve of pond type；
Second submodule, for the voltage change curve figure of acquisition to be compared with the normal voltage change curve, in turn
Judge whether there is gross differences.
7. the system according to claim 6 for diagnosing cell voltage wrong report, which is characterized in that the second submodule
It is specifically used for:
Area under the curve of the voltage change curve figure obtained within the scope of certain voltage is calculated, by itself and the standard electric buckling
The correspondence scalar quantity for changing curve graph is compared, to judge whether there is significant error.
8. the system according to claim 6 for diagnosing cell voltage wrong report, which is characterized in that the system also includes
Initialization module, the initialization module include:
First unit selects multiple batteries to carry out charge-discharge test, and then use voltage monitoring for being directed to every kind of battery types
Circuit monitoring obtains the real-time voltage data of multiple batteries；
Second unit forms pair of the battery types after the real-time voltage data of the multiple batteries obtained are averaged
The normal voltage change curve answered；
Third unit, for constituting standard database according to the normal voltage change curve of different battery types.
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| CN107884718B (en) * | 2017-10-11 | 2021-02-19 | 深圳天珑无线科技有限公司 | Battery remaining capacity calculation method, mobile terminal and storage device |
| CN110334374B (en) * | 2019-04-25 | 2022-11-29 | 四川中鼎智能技术有限公司 | Diagnosis control method, system, storage medium and terminal based on water turbine main valve opening data process |
| TWI721591B (en) * | 2019-10-05 | 2021-03-11 | 三陽工業股份有限公司 | Electric vehicle diagnostic method |
| CN114442600B (en) * | 2022-04-07 | 2022-06-21 | 深圳市星卡科技有限公司 | Detection method and device using current clamp and computer equipment |
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Application publication date: 20170818 Assignee: ZHAOQING XIAOPENG AUTOMOBILE Co.,Ltd. Assignor: GUANGZHOU XPENG AUTOMOBILE TECHNOLOGY Co.,Ltd. Contract record no.: X2020440000168 Denomination of invention: Method and system for diagnosing battery voltage false alarm Granted publication date: 20190917 License type: Common License Record date: 20210104 |