Summary: A powerful person accuses type lead acerbity accumulator to operate power source domain to be used extensively in electric power, the failure mode that understands accumulator and the function state in use process have very important sense to safe production. Choose to reach reasonably use the accumulator with at present medium system of direct current source and battery monitoring and warning device, have very big effect to prolonging the service life of accumulator, having very important sense to obtain the greatest safe benefit and economic benefits. Current, the battery monitoring and warning device that uses in a lot of circumstances just fills voltage data to undertake detecting to float, in the real test that studies a process originally, its conclusion is the important information that internal resistance change is batteries function addle. The article is aimed at fixed and mothball use a powerful person accused plumbic acerbity accumulator to design monitoring and warning device of a battery, can better extension the service life of accumulator. Descriptor: Accumulator monitoring and warning device

One, the internal resistance that is based on digital filter measures a technology

Online the internal resistance that measures every single cell is to detect one of difficult problem of device, accuracy matters to analytic accuracy directly. Online the issue that measures need to solve charger and interference of the load that use phone. To high capacity batteries, batteries internal resistance is small signal of small Europe class, technology of digital filter wave was used to raise accuracy in the article.

Online measure main presence influence of the following element measures:

1) the signal of high frequency interference of slotted line coupling;
2) interference of 50Hz labour frequency;
3) ripple of charger low frequency;
4) the voltage delay that charge or discharges changes;
5) laden irregular fluctuant.

To high frequency interference, pass hardware on one hand the low wave that connect filter is cut down, on the other hand, undertake below effective A/D sampling frequency flowing filter wave is handled. If graph 1-1 place is shown,effective signal is comprised. Origin: WWw.tede.cn

Appropriative drive plant was designed in the research of the article, enter controlled communication signal to batteries group make a present of, measure the alternating voltage signal that circuit collects the batteries that be measured. To remove afore-mentioned influencing factor, used technology of wave of IIR number filter. Origin: Pole of uncut jade of Mian Lai white?

Land please: ? of pole of uncut jade of Mian Lai white browses more information

Origin: Pole of uncut jade of Mian Lai white

Use direct way to be able to realize operation of the equation that need branch. Graph 1-2 is to use the belt that elliptical filter designs to connect filter, m=N=11, have good fall slope, all be inside bandpass and block belt wait for ripple.
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