The difference between German a412 and A512

The difference between German a412 and A512

Generally speaking, the method of measuring the dynamic internal resistance of the German solar storage battery is carried out. If the internal resistance of the battery is r, the no-load voltage of the battery is read out by the voltmeter when the switch K is off, and the discharge current after the switch K is turned on is read out by the ammeter I. At the same time, the load voltage U2 of the battery is read out. Therefore, the internal resistance of German solar battery is obviously that the dynamic internal resistance of German solar battery is a function of discharge current and actual capacity. With the different discharge current of German solar battery, its dynamic internal resistance R is also different. Once the discharge stops, the parameter is zero.
This dynamic resistance can be measured only under dynamic discharge conditions. If you want to measure the actual dynamic internal resistance of the battery in use, you need to use the actual working state of the current intensity to discharge. As can be seen from the calculation formula, it seems that the greater the I value of denominator, the smaller the internal resistance of German solar cells, this simple understanding is not in line with the actual situation. As I and U2 are dependent variables, when I increases, U2 decreases and the molecular difference increases. The overall effect is that the larger the discharge current, the greater the calculated value of internal resistance.
When the discharge current is 0, the calculated value is meaningless. Conductive battery internal resistance detector is precisely in this meaningless condition to measure the battery internal resistance, so this measurement value can not express the battery dynamic internal resistance. Usually the flashlight uses a battery No. 1 to light a small 2.5V bulb with a working current of 0.35A. When the lamp is not on, the measured battery voltage drops to about 0.8V, which is due to the increase in battery resistance. Under this working condition, the Sonnenschein battery has no load voltage of 1.3V, and the internal resistance is 1.44.
German solar cells are used in transistor radios again. As the working current is reduced to 50 mA, the supply voltage of the solar cells can still be about 1.25 V, and the internal resistance is calculated to be 1_. Therefore, when it comes to the internal resistance of the battery, it is necessary to explain the measurement conditions at the same time, so as to have practical significance. These measurement conditions are: the type of battery, the value of the holding capacity, the magnitude of the load current, the time of the load current, the temperature of the electrolyte.
The scrap of German solar battery is due to the increase of dynamic internal resistance. The dynamic internal resistance of Sonnenschein batteries directly determines whether the batteries can be used safely or not. The most reliable method to detect the safe state of the batteries is to determine whether the dynamic internal resistance exceeds the limit.