CN103308858A - Online inspection system for internal resistances of batteries - Google Patents
Online inspection system for internal resistances of batteries Download PDFInfo
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- CN103308858A CN103308858A CN2012100584507A CN201210058450A CN103308858A CN 103308858 A CN103308858 A CN 103308858A CN 2012100584507 A CN2012100584507 A CN 2012100584507A CN 201210058450 A CN201210058450 A CN 201210058450A CN 103308858 A CN103308858 A CN 103308858A
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Abstract
An online inspection system for internal resistances of batteries comprises a power supply module, a voltage inspection control module, an internal resistance inspection control module, a constant-current discharge module, an automatic gain control high-precision differential acquisition module, a microprocessor module, an abnormality detection module and a communication module. The power supply module provides a variety of power supplies for a complete machine and provides isolated power supplies for the constant-current discharge module, the high-precision differential acquisition module and the communication module. First, low-current constant-current discharge is carried out on a battery and is stopped after a certain period of time; then, variation of voltage of the battery by taking a specified time interval as a unit time in the whole process and voltage variation in a certain period of time after discharge are recorded; next, the value V of the voltage is calculated through a mathematical model by carrying out trend analysis on variation of the voltage with the time and subdividing the data; and finally, the internal resistance of a monomer battery is calculated by using the Ohm's law according to the V and a discharge current I.
Description
Technical field
The present invention relates to a kind of detection system of accumulator internal resistance, refer specifically to the online cruising inspection system of a kind of accumulator internal resistance.
Background technology
The state of accumulator directly affects the operate as normal of UPS and the safety of electric power system, even causes power failure and system-down, causes heavy losses, and therefore the on-line monitoring to accumulator seems extremely important.Accumulator internal resistance is the important symbol of battery condition, whether internal resistance changes the size of the degree of aging can reflect accumulator, capacity and lost efficacy, therefore the internal resistance monitoring is the object that is primarily aimed at of accumulator monitoring, and the method that present stage is fit to the accumulator internal resistance on-line monitoring is generally direct-current discharge method and ac-excited method.
The direct-current discharge method: the electric current with 0.3C-0.6C carries out of short duration discharge to accumulator, voltage V1 and electric current I 1 before the record discharge, and the voltage V2 during discharge and electric current I 2 according to formula internal resistance IR=(V1-V2)/(I2-I1), calculate internal resistance.This method measuring current is bigger, needs tens amperes even ampere up to a hundred, and the repeated test precision is subject to collection point and the acquisition time influence of voltage and current, and is bigger to the accumulator damage ratio simultaneously, has potential safety hazard.
Ac-excited method: the interchange constant current that produces about 1KHZ 1A is superimposed upon the accumulator two ends, calculates internal resistance according to feedback signal and phasometer.This mode is vulnerable to wave interference, and the duplicate measurements precision is not high.
Summary of the invention:
For solve the D.C. high-current electric discharge measure infringement that accumulator internal resistance causes accumulator with solve the conventional DC current discharge and already measure the problem of the repeatability precision difference of internal resistance, the present invention proposes with constant low discharging current, by to change in voltage trend analysis set up mathematical model, adopt the Acquisition Circuit of automatic gain control to calculate the on-line monitoring system of accumulator internal resistance.
The present invention includes power module, voltage polling control module, internal resistance and patrol and examine high-precision difference acquisition module, microprocessor module, abnormality detection module and the communication module of control module, constant-current discharge module, automatic gain control.Described power module for complete machine provides various power supplys, and provides insulating power supply to constant-current discharge module, high-precision difference acquisition module and communication module.
Described voltage polling control module when being used for that the more piece accumulator carried out voltage polling, is switched the more piece accumulator, adopts the hardware anticollision to handle, to guarantee only to allow a batteries to insert test loop at synchronization.
Control module is patrolled and examined in described internal resistance, when being used for the more piece accumulator carried out internal resistance and patrol and examine, the more piece accumulator is switched, and adopts the hardware anticollision to handle, to guarantee only to allow a batteries to insert test loop at synchronization.
Described constant-current discharge module is made up of constant pressure source, accurate amplifier and power device.Controlled, constant, direct-current discharge loop accurately is provided, gives security for gathering accurate data.
The high precision collecting module of described automatic gain control is made up of accurate discharge circuit and the high-precision A Acquisition Circuit of multi-stage filter, automatic gain control.
Described microprocessor module provides accurate timing, passage control, data acquisition, data analysis, data operation, correction process, communication protocol and Control on Communication.
Described abnormality detection module to detecting unusually, comprises accumulator polarity error-detecting, passage control abnormality detection, discharge abnormality detection.The abnormality detection module detects unusual back notice microprocessor, and microprocessor receives abnormal signal and makes corresponding correction process.
Described communication module provides network service to realize the ability of remote monitoring and control.
At first accumulator is carried out the constant-current discharge of little electric current, certain time, stop discharge then, next records in the whole process with the specific time interval is the variation of the battery tension of unit interval, comprise the change in voltage in the certain hour after discharge finishes, pass through the time dependent trend analysis of voltage again, simultaneously these data are segmented, pass through mathematical model, calculate voltage V value, according to V and discharge current I, according to Ohm law, calculate the internal resistance of cell batteries at last.
The present invention uses the little direct-current discharge of constant current, sets up mathematical model by the change in voltage trend of record discharge process and draws voltage V value, calculates internal resistance value according to Ohm law then.Only there is a variable voltage V value in computation process, and adopts the Acquisition Circuit of automatic gain control, has improved the precision of internal resistance measurement greatly.
The profitable effect of the present invention is to control cell batteries access test loop by the control module of patrolling and examining of hardware anticollision, by little electric current constant-current discharge, and by analyzing the sparking voltage variation tendency, set up mathematical model, calculate internal resistance, the Acquisition Circuit of automatic gain control combines with mathematical model, make low discharging current also can surpass the accuracy of heavy-current discharge method internal resistance measurement and the precision of duplicate measurements, only there is a variable in the computation process of internal resistance simultaneously, calculate the internal resistance mode with respect to a plurality of variablees, simplify computation process, and improve the precision of internal resistance.This invention is compared and the heavy-current discharge method, and the method is safe and reliable, and is little to accumulator infringement, prolongs accumulator serviceable life.
Description of drawings:
The present invention is further illustrated below in conjunction with accompanying drawing:
Fig. 1, structural representation of the present invention.
Fig. 2, principle of work synoptic diagram of the present invention.
Embodiment:
As shown in Figure 1, the present invention includes power module 1, voltage polling control module 2, internal resistance and patrol and examine control module 3, constant-current discharge module 4, difference acquisition module 5, microprocessor module 6, abnormality detection module 7 and communication module 8.Patrol and examine control module 3 and voltage polling control module 2 by internal resistance and coordinate to select a cell batteries passage for use, make and have only a joint accumulator to insert discharge loop and voltage signal acquisition loop at synchronization.
Constant-current discharge module 4 control cell batteries discharge currents, the cell batteries voltage signal that voltage polling control module 2 is selected for use enters difference acquisition module 5,5 pairs of voltage signals of difference acquisition module amplify, and voltage signal is converted to digital signal, be transferred to microprocessor module 6 and handle.
The online cruising inspection system principle of work of accumulator internal resistance is as shown in Figure 2:
A. control module 3 closed K1, K2 are patrolled and examined in microprocessor module 6 control internal resistances, and microprocessor module 6 control voltage polling control modules 2 closed K3, K4 make cell batteries access differential acquisition module 5 and constant current source module 4.
C. when discharging, microprocessor module 6 starts difference acquisition module 5, gathers voltage signal at interval according to certain hour, and preserves.
D. after arriving certain hour, microprocessor module 6 control constant-current discharge modules 4 stop discharge, and control module 3 disconnection K3, K4 are patrolled and examined in the control internal resistance.
E. continue to gather and the recording voltage signal according to the time interval, arrive up to the given time.
F. the variation tendency of the voltage signal of analytic record obtains V according to the calculated with mathematical model of having set up
G. V and constant-current discharge electric current I substitution Ohm law formula, calculate internal resistance.
Claims (6)
1. the online method for inspecting of accumulator internal resistance is characterized in that, may further comprise the steps:
A. accumulator is carried out the constant-current discharge of little electric current.
B. record the variation of battery discharging voltage.
C. to the time dependent trend analysis of voltage, by calculated with mathematical model voltage V.
D. voltage V and constant-current discharge electric current calculate the internal resistance of cell batteries according to Ohm law.
2. the online method for inspecting of accumulator internal resistance according to claim 1 is characterized in that low discharging current, certain time.
3. as the online method for inspecting of accumulator internal resistance as described in claim 1 and the claim 2, it is characterized in that, among the described step B, be spaced apart unit interval record battery discharging change in voltage with official hour, comprising that discharge finishes the change in voltage of back a period of time.
4. as the online method for inspecting of accumulator internal resistance as described in claim 1, claim 2 and the claim 3, it is characterized in that, among the described step C, to the time dependent trend analysis of voltage, data are segmented, set up mathematical model, calculating voltage V.
5. as the online method for inspecting of accumulator internal resistance as described in the claim 1,2,3,4, it is characterized in that among the described step D, voltage V and constant-current discharge electric current calculate the cell batteries internal resistance according to Ohm law.
6. online method for inspecting of accumulator internal resistance, it is characterized in that, comprising: control module, constant-current discharge module, high-precision difference acquisition module, microprocessor module, abnormality detection module and communication module are patrolled and examined in power module, voltage polling control module, internal resistance.
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| CN2012100584507A CN103308858A (en) | 2012-03-07 | 2012-03-07 | Online inspection system for internal resistances of batteries |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103513112A (en) * | 2013-09-09 | 2014-01-15 | 广东电网公司东莞供电局 | On-line passive detection method and system for storage battery internal resistance |
| CN103633700A (en) * | 2013-12-03 | 2014-03-12 | 国家电网公司 | Direct-current system for detecting internal resistance of parallel storage batteries in online manner |
| CN104297621A (en) * | 2014-10-21 | 2015-01-21 | 北京铁道工程机电技术研究所有限公司 | Voltage collecting device and system for achieving storage battery reverse connection inspection |
| CN105203850A (en) * | 2015-10-28 | 2015-12-30 | 北京新能源汽车股份有限公司 | Estimation method and system of internal resistance of battery and vehicle |
| CN105259415A (en) * | 2015-08-28 | 2016-01-20 | 友达光电股份有限公司 | battery internal resistance calculation method |
| CN105259509A (en) * | 2015-10-19 | 2016-01-20 | 深圳奥特迅电力设备股份有限公司 | Device and method of performing on-line measurement on connecting cable resistance between accumulators |
| CN106556741A (en) * | 2015-09-28 | 2017-04-05 | 深圳奥特迅电力设备股份有限公司 | A kind of device and method of storage battery internal resistance measurement |
| CN109085513A (en) * | 2018-10-12 | 2018-12-25 | 东软睿驰汽车技术（沈阳）有限公司 | A kind of method and apparatus that the internal resistance of cell calculates |
| CN111478402A (en) * | 2020-05-09 | 2020-07-31 | 兴民智通(武汉)汽车技术有限公司 | Vehicle-mounted terminal T-BOX standby battery charging method and system |
| CN112098870A (en) * | 2020-09-15 | 2020-12-18 | 国网辽宁省电力有限公司阜新供电公司 | Online testing method for internal resistance of storage battery of parallel power supply equipment |
| WO2021135565A1 (en) * | 2019-12-31 | 2021-07-08 | 华为技术有限公司 | Storage battery internal resistance measurement device and method |
| CN113552495A (en) * | 2021-07-27 | 2021-10-26 | 石家庄通合电子科技股份有限公司 | Online detection method and device for leakage of storage battery of power supply system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103513112A (en) * | 2013-09-09 | 2014-01-15 | 广东电网公司东莞供电局 | On-line passive detection method and system for storage battery internal resistance |
| CN103633700A (en) * | 2013-12-03 | 2014-03-12 | 国家电网公司 | Direct-current system for detecting internal resistance of parallel storage batteries in online manner |
| CN103633700B (en) * | 2013-12-03 | 2016-03-23 | 国家电网公司 | A kind of direct current system of multiple-connected battery internal resistance on-line checkingi |
| CN104297621A (en) * | 2014-10-21 | 2015-01-21 | 北京铁道工程机电技术研究所有限公司 | Voltage collecting device and system for achieving storage battery reverse connection inspection |
| CN105259415A (en) * | 2015-08-28 | 2016-01-20 | 友达光电股份有限公司 | battery internal resistance calculation method |
| CN105259415B (en) * | 2015-08-28 | 2018-03-30 | 友达光电股份有限公司 | battery internal resistance calculation method |
| CN106556741B (en) * | 2015-09-28 | 2023-09-12 | 深圳奥特迅电力设备股份有限公司 | Device and method for measuring internal resistance of storage battery pack |
| CN106556741A (en) * | 2015-09-28 | 2017-04-05 | 深圳奥特迅电力设备股份有限公司 | A kind of device and method of storage battery internal resistance measurement |
| CN105259509A (en) * | 2015-10-19 | 2016-01-20 | 深圳奥特迅电力设备股份有限公司 | Device and method of performing on-line measurement on connecting cable resistance between accumulators |
| CN105259509B (en) * | 2015-10-19 | 2018-02-09 | 深圳奥特迅电力设备股份有限公司 | The device and method of connecting cable resistance between a kind of online measurement battery |
| CN105203850B (en) * | 2015-10-28 | 2018-07-31 | 北京新能源汽车股份有限公司 | Estimation method and system of internal resistance of battery and vehicle |
| CN105203850A (en) * | 2015-10-28 | 2015-12-30 | 北京新能源汽车股份有限公司 | Estimation method and system of internal resistance of battery and vehicle |
| CN109085513A (en) * | 2018-10-12 | 2018-12-25 | 东软睿驰汽车技术（沈阳）有限公司 | A kind of method and apparatus that the internal resistance of cell calculates |
| CN109085513B (en) * | 2018-10-12 | 2021-02-19 | 东软睿驰汽车技术（沈阳）有限公司 | Method and device for calculating internal resistance of battery |
| WO2021135565A1 (en) * | 2019-12-31 | 2021-07-08 | 华为技术有限公司 | Storage battery internal resistance measurement device and method |
| CN113125979A (en) * | 2019-12-31 | 2021-07-16 | 华为技术有限公司 | Storage battery internal resistance detection device and method |
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| CN111478402A (en) * | 2020-05-09 | 2020-07-31 | 兴民智通(武汉)汽车技术有限公司 | Vehicle-mounted terminal T-BOX standby battery charging method and system |
| CN112098870A (en) * | 2020-09-15 | 2020-12-18 | 国网辽宁省电力有限公司阜新供电公司 | Online testing method for internal resistance of storage battery of parallel power supply equipment |
| CN113552495A (en) * | 2021-07-27 | 2021-10-26 | 石家庄通合电子科技股份有限公司 | Online detection method and device for leakage of storage battery of power supply system |
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Application publication date: 20130918 |