Power check changchun street lamp manufacturers of battery detection algorithm

Electricity detection algorithm of solar street light most of the experimental data show that when the battery aging battery internal resistance and have high correlation between charge ( ( 0. Around 88) The minimum discharge voltage, lead-acid battery directly affects its service life cycle, when the battery of



solar street lamp power detection algorithm most of the experimental data show that when the battery aging battery internal resistance and have high correlation between charge ( ( 0. Around 88) , lead-acid battery Definition: the electrode is mainly composed of lead and its oxide, the electrolyte is a battery of the sulfuric acid solution. 】 The minimum discharge voltage 【 Counter loses self quenching ability of voltage, discharge voltage. 】 Directly affects its service life cycle, when the discharge voltage of the battery is smaller than a certain value, its internal resistance increases sharply, internal temperature rise sharply, and the minimum discharge voltage and the load size have relations because of 0 when full charge and full discharge of battery internal resistance difference between 2 - 4 times, so by measuring the battery internal resistance can accurately detect battery.

2。 2. 2 battery battery equivalent model equivalent impedance z model as shown in figure 20 RR: positive and negative electrode polarization resistance; CC: as the positive and negative electrode polarization capacitance: L for lead inductance; R, for the battery ohm resistance. Battery ohm resistance R, and characterization of the battery charged 【 Is charged for samples of conductive performance is not good, such as semiconductor materials, insulation film, under the action of electron beam, the surface will produce certain negative charge accumulation. 】 Degree. In order to simplify the measuring, usually only separated from the equivalent impedance Z pure resistance R by Ra. Ri. R2) , R and R, and a linear relationship between, the available [R indirectly characterize the battery charged degree 4102. 2. 3 set up internal resistance of a power cycle curve in order to get real-time surplus power value, we should establish a relation between power and resistance of the database. First of all, we first measured the battery internal resistance and the corresponding relationship of time, often used method for dc discharge resistance test 【 Test formula 1, determination of open circuit voltage of the battery. 】 Method. Solar street light work current value as discharge current 【 Discharge current is on load release the stored energy battery when the formation of the current. 】 Value, let the fully charged battery discharge, starting from a certain point in time,

2 - 3 s, mandatory battery 40 - release 80 A large current, the voltage difference between instantaneous break after the discharge voltage stability AV and the ratio of current value of I, calculate the battery internal resistance R,

R = AV several its internal resistance measuring accuracy can reach 0. 1% 0 then make the same state of fully charged battery at the same temperature, discharge time, discharge current and discharge current is obtained for the integral of time, resulting in different times the corresponding power. Finally, at the same temperature, discharge current and discharge time, under the condition of the same with the current integral method, the cycle of battery monitoring, get the initial power value of each cycle, so as to get the battery with the cycle of change, as the amount of correction.

so, on the basis of time, you can set up a battery internal resistance of a cycle curve, and then through 11

atlab draw resistance curve fitting function, the relation between the capacity and cycle. Battery internal resistance' Battery internal resistance is refers to the battery on the job, current flows through the battery internal resistance, generally divided into ac resistance and dc resistance, because the rechargeable battery internal resistance is very small, when measuring the dc resistance due to the capacity of electrode polarization, polarization resistance, its real value, so it can not be measured and the ac impedance measurement can be exempted from the influence of polarization resistance, it is concluded that the real value. 】