CN103713264A - Battery management system SOC estimation precision test system and test method - Google Patents

Battery management system SOC estimation precision test system and test method Download PDF

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Publication number
CN103713264A
CN103713264A CN201310711527.0A CN201310711527A CN103713264A CN 103713264 A CN103713264 A CN 103713264A CN 201310711527 A CN201310711527 A CN 201310711527A CN 103713264 A CN103713264 A CN 103713264A
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battery
data
source
soc
voltage
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CN201310711527.0A
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Inventor
佟玉琦
王子冬
高洪波
陈芬
王发成
胡道中
高申
徐少禹
佟蕾
张跃强
陈潇
田崔钧
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China North Vehicle Research Institute
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China North Vehicle Research Institute
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Abstract

The invention belongs to the technical field of a battery management system and especially relates to a battery management system SOC estimation precision test system and test method. A single voltage simulation source, a battery set total voltage simulation source, a current simulation source, and a battery box temperature field simulation source A data are integrated through a data acquisition control system, high-voltage battery set external characteristic parameters can be simulated, wherein the parameters comprise a single battery voltage, a total voltage, single battery temperature and charge and discharge currents. During battery management system test, the battery management system SOC estimation precision test system is utilized to replace a battery set. The test method can be used for SOC precision test in the battery management system development and test process, thereby greatly reducing development and test period, saving the test cost, and improving the system reliability.

Description

A kind of battery management system SOC estimation precision test macro and method of testing
Technical field
The invention belongs to battery management system technical field, be specifically related to a kind of battery management system SOC estimation precision test macro and method of testing.
Background technology
Electrokinetic cell, as the power source of electric automobile, is the key factor that affects electric automobile whole performance, and it can produce direct impact to distance travelled, acceleration capacity, max. climb slope.Battery charge state SOC(State of charge) being used for describing the quantity of battery dump energy, is the important parameter in battery use procedure.Battery charge state (SOC) is estimated, is core and the difficult point of battery management system research.On the one hand, electric automobile requires accurately to estimate battery SOC, from giving full play to battery ability and improving two angles of security battery is efficiently managed, further to improve vehicle performance; On the other hand, the nonlinearity that batteries of electric automobile in use shows, makes accurately to estimate that SOC has great difficulty.The combination of two aspects, impels the research work of batteries of electric automobile SOC estimation precision measuring technology constantly to carry out, and new method constantly occurs.
One of at present conventional SOC method for testing precision is, according to QC/T897 < < battery for electric automobile management system technical conditions > >, battery set charge/discharge machine is connected to same electric battery with management system to be measured, can select different electric current operating modes, charge-discharge machine fills electric battery, electric discharge, charge-discharge machine and battery management system estimating battery group estimation simultaneously SOC value, tester selectes several SOC points, adopt the SOC estimation difference of visual method contrast charge-discharge machine and battery management system, calculate the SOC estimation error of battery management system.This method of testing is brought two drawbacks.
(1) battery management system and charge-discharge machine do not have synchronization mechanism, independent estimating battery group SOC value separately, and tester adopts the method for visual contrast, the test error bringing due to different testers is larger, valid data are few, and test result is evaluated difficulty, and data trackability is poor.
(2) factor analysis such as the estimation of electric battery SOC and life-span, environment temperature, but while testing according to the method described above, because the impact of test period, experimentation cost can not be carried out the test of different life-spans and environment, cause the accuracy of test result to have certain limitation.
Two of at present conventional method of testing is, use battery charging and discharging equipment to carry out discharging and recharging of different electric current operating modes to different life-spans, temperature electric battery, preserve SOC value and magnitude of voltage, set up the tables of data of SOC and monomer voltage, when battery management system connection electric battery is estimated, by SOC value corresponding magnitude of voltage and the contrast of the voltage tabular value in tables of data.This method is used for the SOC calibration of battery management system, when testing, still exists data to review difficulty, credible poor problem.
Summary of the invention
(1) technical matters that will solve
The technical problem to be solved in the present invention is: how a kind of electric battery SOC estimation precision test macro and method of testing that can meet current technical requirement is provided.
(2) technical scheme
For solving the problems of the technologies described above, the invention provides a kind of battery management system SOC estimation precision test macro, described test macro comprises: battery set charge/discharge equipment and high-tension battery group external characteristic simulator; Described high-tension battery group external characteristic simulator comprises: for the data acquisition control system of control simulation electric battery external characteristics parameter, the monomer voltage dummy source being connected with described data acquisition control system, assembled battery total voltage dummy source, current analog source and battery case temperature field simulation source; Described monomer voltage dummy source comprises: for communication unit and the monomer voltage simulation maker communicating with described data acquisition control system; Described assembled battery total voltage dummy source comprises: for communication unit and the total voltage simulation maker communicating with described data acquisition control system; Described current analog source comprises: for communication unit and the current analog maker communicating with described data acquisition control system; Described battery case temperature field simulation source comprises: for communication unit and the temperature simulation maker of communicating by letter with described data acquisition control system;
Described battery set charge/discharge equipment, for using typical condition to discharge and recharge to the electric battery of different life-spans, environment, in charge and discharge process, records battery pack current, monomer voltage, total voltage, battery surface temperature information, SOC value, using this SOC value as standard value;
Described data acquisition control system is for receiving recorded battery pack current, monomer voltage, total voltage, battery surface temperature information, using above-mentioned record data as data source; Described data acquisition control system is also for sending instruction by bus, controls in described monomer voltage dummy source, assembled battery total voltage dummy source, current analog source, battery case temperature field simulation source monomer voltage simulation maker, total voltage simulation maker, current analog maker and temperature simulation maker separately according to data output monomer voltage data, total voltage data, current data, the temperature data of received data source;
Mesuring battary management system gathers described monomer voltage data, total voltage data, current data and temperature data by the signal acquisition module of self; Mesuring battary management system is carried out SOC estimation by the data message collecting, and obtains SOC estimated value, and described SOC estimated value is sent to data acquisition control system by bus; The standard value SOC value of recording in the SOC value that described data acquisition control system is beamed back management system to be measured and aforementioned charge and discharge process contrasts, and obtains the error amount of SOC estimation.
In addition, the present invention also provides a kind of battery management system SOC estimation precision method of testing, and described method of testing is implemented based on aforementioned battery management system SOC estimation precision test macro; Wherein, described method of testing comprises the steps:
Step S1: use typical condition to discharge and recharge to the electric battery of different life-spans, environment by described battery set charge/discharge equipment, in charge and discharge process, record battery pack current, monomer voltage, total voltage, battery surface temperature information, SOC value, using this SOC value as standard value;
Step S2: recorded battery pack current, monomer voltage, total voltage, battery surface temperature information are sent to described data acquisition control system as data source;
Step S3: data acquisition control system sends instruction by bus, controls in described monomer voltage dummy source, assembled battery total voltage dummy source, current analog source, battery case temperature field simulation source monomer voltage simulation maker, total voltage simulation maker, current analog maker and temperature simulation maker separately according to data output monomer voltage data, total voltage data, current data, the temperature data of the data source receiving in step S2;
Step S4: mesuring battary management system gathers described monomer voltage data, total voltage data, current data and temperature data by the signal acquisition module of self;
Step S5: mesuring battary management system is carried out SOC estimation by the data message collecting, obtains SOC estimated value, and described SOC estimated value is sent to data acquisition control system by CAN bus;
Step S6: the standard value SOC value that in the SOC value that described data acquisition control system is beamed back management system to be measured and abovementioned steps S1, charge and discharge process is recorded contrasts, obtains the error amount that SOC estimates.
(3) beneficial effect
The present invention is by the integrated monomer voltage dummy source of data acquisition control system, assembled battery total voltage dummy source, current analog source, battery case temperature field simulation source, can simulated high-pressure electric battery external characteristics Parameter Variation, comprise monomer battery voltage, total voltage, cell temperature, charging and discharging currents, during battery management system test, use electric battery SOC estimation precision test macro to replace electric battery, can be used for debugging and the functional verification of battery management system, SOC accuracy test for battery management system development experiments process, the battery management system development and testing cycle can be shortened greatly, save battery management system testing cost, improve battery management system reliability.
Accompanying drawing explanation
Fig. 1 is the structural drawing of battery management system SOC estimation precision test macro of the present invention.
Embodiment
For making object of the present invention, content and advantage clearer, below in conjunction with drawings and Examples, the specific embodiment of the present invention is described in further detail.
For solving the problem of prior art, the invention provides a kind of battery management system SOC estimation precision test macro, as shown in Figure 1, described test macro comprises: battery set charge/discharge equipment and high-tension battery group external characteristic simulator; Described high-tension battery group external characteristic simulator comprises: for the data acquisition control system of control simulation electric battery external characteristics parameter, be connected with described data acquisition control system can nominal monomer voltage dummy source, assembled battery total voltage dummy source, current analog source and battery case temperature field simulation source; Described monomer voltage dummy source comprises: for communication unit and the monomer voltage simulation maker communicating with described data acquisition control system; Described assembled battery total voltage dummy source comprises: for communication unit and the total voltage simulation maker communicating with described data acquisition control system; Described current analog source comprises: for communication unit and the current analog maker communicating with described data acquisition control system; Described battery case temperature field simulation source comprises: for communication unit and the temperature simulation maker of communicating by letter with described data acquisition control system;
Described battery set charge/discharge equipment, for using typical condition to discharge and recharge to the electric battery of different life-spans, environment, in charge and discharge process, records battery pack current, monomer voltage, total voltage, battery surface temperature information, SOC value, using this SOC value as standard value;
Described data acquisition control system is for receiving recorded battery pack current, monomer voltage, total voltage, battery surface temperature information, using above-mentioned record data as data source; Described data acquisition control system is also for sending instruction by PXI bus, controls in described monomer voltage dummy source, assembled battery total voltage dummy source, current analog source, battery case temperature field simulation source monomer voltage simulation maker, total voltage simulation maker, current analog maker and temperature simulation maker separately according to data output monomer voltage data, total voltage data, current data, the temperature data of received data source;
Mesuring battary management system gathers described monomer voltage data, total voltage data, current data and temperature data by the signal acquisition module of self; Mesuring battary management system is carried out SOC estimation by the data message collecting, and obtains SOC estimated value, and described SOC estimated value is sent to data acquisition control system by CAN bus; The standard value SOC value of recording in the SOC value that described data acquisition control system is beamed back management system to be measured and aforementioned charge and discharge process contrasts, and obtains the error amount of SOC estimation.
In addition, the present invention also provides a kind of battery management system SOC estimation precision method of testing, and described method of testing is implemented based on aforementioned battery management system SOC estimation precision test macro; Wherein, described method of testing comprises the steps:
Step S1: use typical condition to discharge and recharge to the electric battery of different life-spans, environment by described battery set charge/discharge equipment, in charge and discharge process, record battery pack current, monomer voltage, total voltage, battery surface temperature information, SOC value, using this SOC value as standard value;
Step S2: recorded battery pack current, monomer voltage, total voltage, battery surface temperature information are sent to described data acquisition control system as data source;
Step S3: data acquisition control system sends instruction by bus, controls in described monomer voltage dummy source, assembled battery total voltage dummy source, current analog source, battery case temperature field simulation source monomer voltage simulation maker, total voltage simulation maker, current analog maker and temperature simulation maker separately according to data output monomer voltage data, total voltage data, current data, the temperature data of the data source receiving in step S2;
Step S4: mesuring battary management system gathers described monomer voltage data, total voltage data, current data and temperature data by the signal acquisition module of self;
Step S5: mesuring battary management system is carried out SOC estimation by the data message collecting, obtains SOC estimated value, and described SOC estimated value is sent to data acquisition control system by CAN bus;
Step S6: the standard value SOC value that in the SOC value that described data acquisition control system is beamed back management system to be measured and abovementioned steps S1, charge and discharge process is recorded contrasts, obtains the error amount that SOC estimates.
Thus, described battery management system SOC estimation precision test macro can be used for the change procedure of batteries monomer voltage, total voltage, electric current, battery temperature in simulated high-pressure electric battery charge and discharge process, the variation characteristic of each electric battery thermoelectricity parameter when simulated battery group breaks down, SOC accuracy test for battery management system development experiments process, reduce the battery management system development and testing cycle, saved battery management system testing cost.
Introduce specific embodiment below.
Embodiment
The present embodiment provides a kind of test macro and method of testing of battery management system SOC estimation precision, comprise charge-discharge machine for can be battery set charge/discharge, data acquisition control system that can control simulation electric battery external characteristics parameter, the monomer voltage dummy source being connected with data acquisition control system, assembled battery total voltage dummy source, current analog source, battery case temperature field simulation source.Charge-discharge machine discharges and recharges electric battery, the change procedure of the batteries monomer voltage in simulated high-pressure electric battery charge and discharge process, total voltage, charging current, battery temperature, the variation characteristic of thermoelectricity parameter when simulated battery group breaks down, can replace electric battery to be used for the SOC estimation precision test of battery management system development experiments process.
Above-mentioned charge-discharge machine, according to required operating mode as shown in table 1, discharges and recharges electric battery, and while acquisition and recording battery pack current, monomer voltage, total voltage, temperature information, SOC information, using this SOC value as standard value.
Table 1
Time increment [s] Cumulative time [s] Electric current [C-leads]
5 5 -8
5 10 0
5 15 -8
5 20 0
20 42 1.5
2 44 4
8 50 0
Above-mentioned data acquisition control system passes through 232 total line traffic control monomer voltage dummy sources, passes through 232 total line traffic control assembled battery total voltage dummy sources, by gpib bus, is controlled current analog source, passed through 232 total line traffic control battery case temperature field simulation sources.
Above-mentioned monomer voltage dummy source comprises 232 communication units (as the BAT-NEHP15 of Foochow nebula electronics) and monomer voltage simulation maker.Its principle of work is: monomer voltage parameter or monomer voltage change curve that data acquisition control system will be simulated by 232 buses send to monomer voltage dummy source, monomer voltage simulation maker is according to the instruction output voltage of data acquisition control system, tested management system monomer voltage calibrating terminal connects monomer voltage dummy source, gathers monomer voltage data.
Above-mentioned assembled battery total voltage dummy source comprises gpib bus communication unit (as the BHK1000-40MG of U.S. KEPCO) and total voltage simulation maker, its principle of work is: total voltage parameter or total voltage change curve that data acquisition control system will be simulated by gpib bus send to assembled battery total voltage dummy source, total voltage simulation maker is according to the instruction output total voltage data of data acquisition control system, tested management system total voltage calibrating terminal connects assembled battery total voltage dummy source, gathers total voltage data.
Above-mentioned current analog source comprises gpib bus communication unit (as the 6680A of U.S. Agilent) and current analog maker, its principle of work is: total voltage parameter or total voltage change curve that data acquisition control system will be simulated by CAN bus send to current analog source, current analog maker is according to the instruction output current data of data acquisition control system, tested management system total voltage calibrating terminal connects current analog source, gathers current data.
Above-mentioned battery case temperature field simulation source comprises 232 communication units (as this peck sweat box of Japanese dust MC-811) and temperature simulation maker.Its principle of work is: the temperature parameter that data acquisition control system will be simulated by 232 buses or temperature variation curve send to battery case temperature field simulation source, temperature simulation maker regulates temperature according to instruction, tested management system temperature calibrating terminal is put into battery case temperature field simulation source, collecting temperature data.
Described tested management system is carried out the SOC value of evaluation and simulation electric battery by the data message of above-mentioned four step collections, and send to data acquisition control system, by data acquisition control system, this estimated value and standard value are compared, generate the error amount of SOC estimation.
In sum, the present invention is by the integrated monomer voltage dummy source of data acquisition control system, assembled battery total voltage dummy source, current analog source, battery case temperature field simulation source, can simulated high-pressure electric battery external characteristics Parameter Variation, comprise monomer battery voltage, total voltage, cell temperature, charging and discharging currents, during battery management system test, use electric battery SOC estimation precision test macro to replace electric battery, debugging and functional verification for battery management system, can greatly shorten the construction cycle, cost-saving, improve battery management system reliability.
Method of testing based on this system is provided below, specifically comprises:
A1. in electric motor car driving process, by battery set charge/discharge equipment, to electric battery, use typical condition to discharge and recharge, in charge and discharge process, record battery pack current, monomer voltage, total voltage, temperature information, SOC information, using this SOC value as standard value.
A2. battery pack current, monomer voltage, total voltage, temperature information are sent to data acquisition control system as data source.
A3. data acquisition control system sends instruction by PXI bus, and monomer voltage dummy source, total voltage dummy source, current analog source, battery case dummy source are according to data output monomer voltage, total voltage, electric current, temperature field information in A2.
A4. mesuring battary management system gathers described monomer voltage data, total voltage data, current data and the temperature data in A3 by the signal acquisition module of self.
A5. mesuring battary management system is carried out SOC estimation by the information collecting, and SOC estimated value is sent to data acquisition control system by CAN bus.
The SOC value of preserving in the SOC value that A6. data acquisition control system is beamed back management system to be measured and A1 contrasts, and obtains the error amount of SOC estimation.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, do not departing under the prerequisite of the technology of the present invention principle; can also make some improvement and distortion, these improvement and distortion also should be considered as protection scope of the present invention.

Claims (2)

1. a battery management system SOC estimation precision test macro, is characterized in that, described test macro comprises: battery set charge/discharge equipment and high-tension battery group external characteristic simulator; Described high-tension battery group external characteristic simulator comprises: for the data acquisition control system of control simulation electric battery external characteristics parameter, the monomer voltage dummy source being connected with described data acquisition control system, assembled battery total voltage dummy source, current analog source and battery case temperature field simulation source; Described monomer voltage dummy source comprises: for communication unit and the monomer voltage simulation maker communicating with described data acquisition control system; Described assembled battery total voltage dummy source comprises: for communication unit and the total voltage simulation maker communicating with described data acquisition control system; Described current analog source comprises: for communication unit and the current analog maker communicating with described data acquisition control system; Described battery case temperature field simulation source comprises: for communication unit and the temperature simulation maker of communicating by letter with described data acquisition control system;
Described battery set charge/discharge equipment, for using typical condition to discharge and recharge to the electric battery of different life-spans, environment, in charge and discharge process, records battery pack current, monomer voltage, total voltage, battery surface temperature information, SOC value, using this SOC value as standard value;
Described data acquisition control system is for receiving recorded battery pack current, monomer voltage, total voltage, battery surface temperature information, using above-mentioned record data as data source; Described data acquisition control system is also for sending instruction by bus, controls in described monomer voltage dummy source, assembled battery total voltage dummy source, current analog source, battery case temperature field simulation source monomer voltage simulation maker, total voltage simulation maker, current analog maker and temperature simulation maker separately according to data output monomer voltage data, total voltage data, current data, the temperature data of received data source;
Mesuring battary management system gathers described monomer voltage data, total voltage data, current data and temperature data by the signal acquisition module of self; Mesuring battary management system is carried out SOC estimation by the data message collecting, and obtains SOC estimated value, and described SOC estimated value is sent to data acquisition control system by bus; The standard value SOC value of recording in the SOC value that described data acquisition control system is beamed back management system to be measured and aforementioned charge and discharge process contrasts, and obtains the error amount of SOC estimation.
2. a battery management system SOC estimation precision method of testing, is characterized in that, described method of testing is implemented based on battery management system SOC estimation precision test macro claimed in claim 1; Wherein, described method of testing comprises the steps:
Step S1: use typical condition to discharge and recharge to the electric battery of different life-spans, environment by described battery set charge/discharge equipment, in charge and discharge process, record battery pack current, monomer voltage, total voltage, battery surface temperature information, SOC value, using this SOC value as standard value;
Step S2: recorded battery pack current, monomer voltage, total voltage, battery surface temperature information are sent to described data acquisition control system as data source;
Step S3: data acquisition control system sends instruction by bus, controls in described monomer voltage dummy source, assembled battery total voltage dummy source, current analog source, battery case temperature field simulation source monomer voltage simulation maker, total voltage simulation maker, current analog maker and temperature simulation maker separately according to data output monomer voltage data, total voltage data, current data, the temperature data of the data source receiving in step S2;
Step S4: mesuring battary management system gathers described monomer voltage data, total voltage data, current data and temperature data by the signal acquisition module of self;
Step S5: mesuring battary management system is carried out SOC estimation by the data message collecting, obtains SOC estimated value, and described SOC estimated value is sent to data acquisition control system by CAN bus;
Step S6: the standard value SOC value that in the SOC value that described data acquisition control system is beamed back management system to be measured and abovementioned steps S1, charge and discharge process is recorded contrasts, obtains the error amount that SOC estimates.
CN201310711527.0A 2013-12-20 2013-12-20 Battery management system SOC estimation precision test system and test method Pending CN103713264A (en)

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CN106646261A (en) * 2017-01-03 2017-05-10 重庆长安汽车股份有限公司 Accuracy verification method and accuracy verification system for SOC of battery management system
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CN109884533A (en) * 2019-03-11 2019-06-14 北京百度网讯科技有限公司 The diagnostic method and device of battery failures, equipment and storage medium
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Application publication date: 20140409