During the operation of the smart NiMH battery charger, a small part of the smart battery charger has the function of discharging. So how does a smart NiMH battery charger discharge? Does the smart NiMH charger work by the same mechanism in all cases?
The discharge process of a smart NiMH charger during operation is balanced and theoretically the rate and depth of discharge of a smart NiMH charger should be noted. Simply put, it is the multiplier rate of discharge (discharge current) and the cut-off voltage of discharge
How to do that the charger discharge depth is more scientific?
The general standard is that a smart NiMH charger can charge a battery between 0V and 1.4V. Routinely, when the voltage of a NiMH battery is lower than 0.9V the battery should not be used because it is below 1V.
"Over-discharge" leads to excessive evaporation of the electrolyte and, to a lesser extent, to an over-reaction of the negative electrode of the NiMH battery, which leads to the formation of a dielectric film. Alteration and reduction of de-embedding capacity. Loss of capacity.
For example, an 1800mAh battery discharged at 0.1C would have a discharge current of 180mAh, and the discharge current is usually low. Therefore, in the discharge of smart NiMH charger, from the depth of discharge, battery production suppliers should pay attention to replenish the power; from the perspective of discharge current, pay attention to the fine flow. Usually, NiMH batteries possess the possibility of reactivation, so you do not have to mind how the smart charger is, the process of discharging can activate the battery. This is most evident in the case of nickel spacer batteries.
When the smart NiMH battery is placed for a long time, the battery itself also has a discharge phenomenon called self-discharge. So, how does the self-discharge process of NiMH batteries discharge? It is mainly related to the temperature of the environment where it is located. Generally speaking, the self-discharge discharge rate is 10% per month at a temperature of (55°C), and only 2-3% is lost per month at room temperature.
Normally, the intelligent discharge process of NiMH battery chargers usually uses a resistive short circuit to convert the power into heat, or through MOS tubes to consume the power of the battery, and on some of the higher performance battery chargers only, the discharge efficiency can be constant and set to measure the stored energy of the battery through a constant discharge efficiency (discharge current) and discharge duration (discharge time). to identify the current state of the battery. These chargers have been in industrial mass production for a long time. The measurement performance of individual chargers almost reaches the performance of professional equipment, such as IC99 of RYDBATT, which has a high accuracy of capacity identification.
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