CN105548907B - New energy vehicle data record method based on battery management system - Google Patents
New energy vehicle data record method based on battery management system Download PDFInfo
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- CN105548907B CN105548907B CN201610027448.1A CN201610027448A CN105548907B CN 105548907 B CN105548907 B CN 105548907B CN 201610027448 A CN201610027448 A CN 201610027448A CN 105548907 B CN105548907 B CN 105548907B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/392—Determining battery ageing or deterioration, e.g. state of health
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/382—Arrangements for monitoring battery or accumulator variables, e.g. SoC
- G01R31/3835—Arrangements for monitoring battery or accumulator variables, e.g. SoC involving only voltage measurements
Abstract
The invention discloses the new energy vehicle data record method based on battery management system, the step of this method, includes：S1, the initial time voltage data and capacity data for recording battery；Battery voltage data during S2, real-time collecting work, and current battery level data are judged based on predetermined threshold value △ V；If meeting Rule of judgment, next step is executed；If being unsatisfactory for Rule of judgment, this step is continued to execute；S3, capacity increment peak computational is carried out to the battery voltage data for meeting condition, records and stores the voltage data and capacity increment peak-data.Technical solution of the present invention can solve in the prior art since battery management system space finite sum constant duration records data, caused by data overflow and the excessive problem of transmission pressure.
Description
Technical field
The present invention relates to the field of battery management of new energy vehicle, more particularly to a kind of based on the new of battery management system
Energy vehicle data record method.
Background technology
In order to cope with environmental pollution and the energy crisis of getting worse, the exploitation of new energy vehicle and universal extremely urgent.
Core component of the power battery as new energy vehicle dynamical system, safety that operational reliability runs vehicle and efficiently
Property is most important.In order to ensure power drive system reliability of operation and validity, battery management system is essential.Make
For the core component in monitoring operation and protection battery key technology, battery management system (Battery Management
System, abbreviation BMS) it not only needs to record the external variable of battery, such as electric current, voltage, temperature, while remaining electricity should be provided
Amount and power level prediction are as a result, and have the integrated system for carrying out the function sets such as intelligent charge and cell safety diagnosis.
Due to battery management system limited storage space and usually with constant duration record data, in system control process often
There is the case where data spilling, while also having aggravated the pressure of data transmission procedure.
Invention content
The new energy vehicle data record based on battery management system that the technical problem to be solved in the present invention is to provide a kind of
Method, with solve in the prior art due to battery management system space finite sum constant duration record data, caused by number
According to the problem overflowed and transmission pressure is excessive.
In order to solve the above technical problems, the present invention uses following technical proposals：
The step of new energy vehicle data record method based on battery management system, this method includes：
S1, record initial time voltage data and capacity data；
Battery voltage data during S2, real-time collecting work, and based on predetermined threshold value △ V to current battery level number
According to being judged；If meeting Rule of judgment, S3 is thened follow the steps；If being unsatisfactory for Rule of judgment, continue to judge；
S3, capacity increment peak computational is carried out to the battery voltage data for meeting condition, records and stores the voltage data
With capacity increment peak-data.
Preferably, at the time of the initial time is that battery management system is started to work.
Preferably, the predetermined threshold value △ V require to be set according to Practical Project.
Preferably, basis in the step S2 | V2-V1| >=△ V judge current battery level data；Wherein, V2
For voltage data currently to be judged, V1For the voltage data of previous record.
Preferably, basis in the step S3Calculate battery capacity increment peak-data；Wherein, P2For
V2Capacity increment peak-data, Q2And Q1Respectively V2And V1Battery capacity data.
Preferably, the caching of battery management system is stored in this method with the battery voltage data and capacity data judged
Qu Zhong；The data for meeting Rule of judgment are stored in the persistent storage of battery management system.
Beneficial effects of the present invention are as follows：
Technical solution of the present invention has higher tolerance to battery management system measurement error, can be used for discontinuous make
It is analyzed with the battery data under process or off-line state；Compared with constant duration recording mode, recorded using the present invention
Total amount of data substantially reduce, the transimission and storage pressure of data has been effectively relieved；Can accurately reappear simultaneously using etc. between the times
Every recording mode data, realize taking into account for data transmission rapidity and accuracy；In addition, recorded data of the present invention
The analysis that can be directly used for cell health state provides foundation to obtain the agine mechaism during battery use.
Description of the drawings
Specific embodiments of the present invention will be described in further detail below in conjunction with the accompanying drawings；
Fig. 1 shows the schematic diagram of new energy vehicle data record method of the present invention；
Fig. 2 shows the curve shape schematic diagrames of institute's recording method of the present invention under different voltages spacing value；
Fig. 3 shows the schematic diagram of the data record and storing process of the present invention；
Fig. 4 shows the schematic diagram using constant duration record data；
Fig. 5 shows the schematic diagram using the method for the invention record data；
Fig. 6 shows the comparison schematic diagram of the prior art and the recorded amount of this method；
Fig. 7 shows to show using constant duration recording mode is recorded using recorded data of the present invention reproduction
It is intended to.
Specific implementation mode
In order to illustrate more clearly of the present invention, the present invention is done further with reference to preferred embodiments and drawings
It is bright.Similar component is indicated with identical reference numeral in attached drawing.It will be appreciated by those skilled in the art that institute is specific below
The content of description is illustrative and be not restrictive, and should not be limited the scope of the invention with this.
As shown in Figure 1, the invention discloses it is a kind of can be suitable for the independent charge/discharge of battery based on battery management system
New energy vehicle data record method, this method includes：
Battery initial time voltage data and capacity data when S1, record battery management system start-up operation.
The real-time battery that battery management system is acquired according to preset voltage spaces value △ V in S2, the course of work
Voltage data is judged；Basis in the step | V2-V1| >=△ V judge current battery level data, wherein V2For
Current voltage data to be judged, V1For the voltage data of previous record.
S3, the battery voltage data to meeting Rule of judgment and the capacity data at current time, are obtained by data operation
Capacity increment peak-data records and stores voltage data and capacity increment peak-data；Basis in the stepCalculate battery capacity increment peak-data；Wherein, P2For V2Capacity increment peak-data, Q2And Q1Respectively
V2And V1Battery capacity data.
As shown in Fig. 2, in the case of different voltages spacing value △ V, the curve that is recorded using the method for the invention
Shape is basically unchanged, although the height at second peak is changed, its position does not change yet, illustrates the present invention to battery
Management systematic measurement error has higher tolerance.
As shown in figure 3, the data record and storing process, voltage data to be judged and capacity data etc. for the present invention are deposited
In BMS buffer areas, the data for meeting condition are stored in the persistent storages BMS for storage, and backstage can be stored in when data volume is excessive
In server.Using the storage data of background server, recorded data of the present invention can be used for it is discontinuous using process or
Battery data analysis under off-line state.
Below by one group of example, the invention will be further described：
The present invention is under the premise of ensureing the integrality and consistency of actual motion environment and test object, with battery constant current
For charging process, wherein the initial state-of-charge of battery (State of Charge, abbreviation SOC) is 0%, and charging current is
1/3C, when cell voltage reaches charge cutoff voltage, the charging process terminates, and constant duration note is respectively adopted in whole process
Record mode and the present invention carry out data record (Δ V takes 4mV)：As shown in figure 4, recorded using constant duration recording mode
Data reflection is variation relation of the voltage with charging capacity, i.e., well known battery charging curve；As shown in figure 5, using this hair
Bright recorded data then describes variation relation of the capacity increment peak value with voltage, can be used as the data of capacity increment analytic approach
Basis.As shown in fig. 6, recorded data total amount of the present invention is only the 1/ of the data volume of the times constant durations such as use record
65, record data volume substantially reduces, and the transimission and storage pressure of data has been effectively relieved.
Capacity increment analytic approach described in this programme is held as a kind of in-situ observation method by charging/discharging voltage curve
Amount incremental rate curve (variation relation that i.e. present invention is recorded) can detect the electrochemical properties that battery is small and is altered in steps,
And the variation tendency by curve per part is combined with the thermodynamics and kinetics characteristic of battery, and then obtain cell degradation process
The change procedure of middle material property.
Using the capacity data of constant duration recording mode as interpolation point, using between the recorded consecutive points of the present invention
Voltage data and capacity data carry out linear interpolation, you can the number recorded using constant duration recording mode restored
According to.As shown in fig. 7, that restores uses constant duration recording mode recorded data error within 1mV.
Obviously, the above embodiment of the present invention be only to clearly illustrate example of the present invention, and not be pair
The restriction of embodiments of the present invention may be used also on the basis of the above description for those of ordinary skill in the art
To make other variations or changes in different ways, all embodiments can not be exhaustive here, it is every to belong to this hair
Row of the obvious changes or variations that bright technical solution is extended out still in protection scope of the present invention.
Claims (6)
1. the new energy vehicle data record method based on battery management system, which is characterized in that the step of this method includes：
S1, record initial time voltage data and capacity data；
Battery voltage data during S2, real-time collecting work, and based on predetermined threshold value △ V to current battery level data into
Row judges；If meeting Rule of judgment, S3 is thened follow the steps；If being unsatisfactory for Rule of judgment, continue to judge；
S3, capacity increment peak computational is carried out to the battery voltage data for meeting condition, records and stores the voltage data and appearance
Measure increment peak-data.
2. new energy vehicle data record method according to claim 1, which is characterized in that the initial time is battery
At the time of managing system starts.
3. new energy vehicle data record method according to claim 1, which is characterized in that the predetermined threshold value △ V roots
Factually border engine request is set.
4. new energy vehicle data record method according to claim 1, which is characterized in that basis in the step S2 |
V2-V1| >=△ V judge current battery level data；Wherein, V2For voltage data currently to be judged, V1It is previous
The voltage data of record.
5. new energy vehicle data record method according to claim 4, which is characterized in that basis in the step S3Calculate battery capacity increment peak-data；Wherein, P2For V2Capacity increment peak-data, Q2And Q1Respectively
V2And V1Battery capacity data.
6. new energy vehicle data record method according to claim 1, which is characterized in that be judged in this method
Battery voltage data and capacity data are stored in the buffer area of battery management system；The data for meeting Rule of judgment are stored in electricity
Pond manages in the persistent storage of system.
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| CN107589374A (en) * | 2016-07-06 | 2018-01-16 | 深圳市沃特玛电池有限公司 | Batteries of electric automobile inclusion quantity evaluation method |
| CN107045104B (en) * | 2016-11-29 | 2019-12-31 | 北京交通大学 | Online estimation method for capacity of lithium titanate battery |
| WO2019033391A1 (en) * | 2017-08-18 | 2019-02-21 | 罗伯特·博世有限公司 | Method, device and system for detecting battery pack consistency |
| CN108248431A (en) * | 2018-01-23 | 2018-07-06 | 南京浦和数据有限公司 | A kind of battery charge data storage and extracting method |
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| CN102466785A (en) * | 2010-11-09 | 2012-05-23 | 欣旺达电子股份有限公司 | Acquisition method and acquisition device for voltage difference values among single batteries of power battery pack |
| CN102636754A (en) * | 2011-02-11 | 2012-08-15 | 成功大学 | Battery residual capacity pre-estimating method and system |
| CN103616643A (en) * | 2013-11-15 | 2014-03-05 | 清华大学 | Data processing method for analyzing battery running conditions |
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| US10393813B2 (en) * | 2013-08-27 | 2019-08-27 | The Regents Of The University Of Michigan | On-board state of health monitoring of batteries using incremental capacity analysis |
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| CN102466785A (en) * | 2010-11-09 | 2012-05-23 | 欣旺达电子股份有限公司 | Acquisition method and acquisition device for voltage difference values among single batteries of power battery pack |
| CN102636754A (en) * | 2011-02-11 | 2012-08-15 | 成功大学 | Battery residual capacity pre-estimating method and system |
| CN103616643A (en) * | 2013-11-15 | 2014-03-05 | 清华大学 | Data processing method for analyzing battery running conditions |
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