Charging Approach of the NiMH Battery
Neither lithium batteries nor NiMH batteries can endure overcharge. That is why the PICKCUT control technique of consistent current charging for the NiMH batteries is the ideal charging way to stop charging when the voltage is the highest. In the case of lithium batteries, it is good to utilize constant current and continuous voltage charging approaches. If the Ni-Cd battery charger-DV control approach is utilized for charging, it will impact the service life of the lithium battery and the nickel-metal hydride battery.
The Self-Discharge Rate of NiMH Battery
NiMH batteries are 25 to 35 % / month, Ni-Cd batteries are 15 to 30 % / month, and lithium batteries are 2 to 5 % (months). The self-discharge rate of the NiMH battery is the biggest, whereas the discharge rate of the lithium battery is really less as compared with the other 2 kinds of batteries.
Memory Effect of NiMH Batteries
NiMH batteries have the very same memory effect as Ni-Cd batteries but they are much smaller sized than Ni-Cd batteries. So, it is not needed to do a discharge operation each time it is charged (due to the fact that incorrect operation will harm the battery), it simply takes 3 months to completely discharge and charge to reduce the memory effect.
NiMH Battery Charging Techniques
Scientific charging techniques can prolong the life of the NiMH batteries. Under normal conditions, a brand-new NiMH battery has just a limited amount of power, and it should be charged prior to use.
If the battery leaves the factory floor for a brief time and has adequate power, it is suggested to utilize it prior to charging. New nickel-metal hydride batteries usually require to be charged and utilized 3 to 4 times before their performance reaches their best state.
Although the memory effect of the NiMH batteries is little, it is suitable to recharge them after each usage, and to charge all of them together. Don't charge them for some time and after that utilize them once again. This is a crucial point for extending its life.
When charging, take notice of the heat dissipation nearby the charger. Store the battery cleanly when not in usage, particularly the contacts at both the ends, and wipe it lightly with a soft dry fabric if required. Take the battery out and place it in a dry climate if it is not used for an extended time.
It's Better to Have a Higher Capacity of the NiMH Battery
For different kinds of batteries, the greater the capacity, the longer is the usage time. Despite the volume and weight elements, a higher capacity is more suitable for applications needing extra power.
For the exact same battery model, a small capacity (such as the 1500 mAh NiMh battery) is likewise the same, and the real determined initial capacity is different. For instance, one is 1650mAh and the other is 1610mAh, so the 1650mAh one is better than the 1610mAh battery.
NiMH batteries will go into a sleep state after being stored for a couple of months, and the battery life will be considerably minimized. If the NiMH battery has actually been stored for an extended time, it is advised to charge it with a slow charge initially. Usually, the voltage of the NiMH battery is under 1.2 V prior to charging, and the usual voltage is around 1.4 V after being totally charged. This method can be used to find out whether the battery is totally charged.
Sum It Up
The battery is a chemical source of power commonly utilized worldwide. It has the benefits of steady voltage, safe and trustworthiness, low rate, broad application range, plentiful basic materials, and a high recycling rate.
The advancements in science and technology, the enhancement of the way of human life, the crisis of petroleum sources, and the weakening ecological conditions of our planet have formed a double social background of rapid advancement of innovation and industry in the domain of brand-new secondary batteries and related products. The immediate need in the market has actually caused the development of brand-new secondary batteries. Amongst them, maintenance-free lead-acid batteries, nickel-zinc batteries, high-energy nickel-cadmium batteries, nickel-metal hydride batteries, lead fabric batteries, lithium-ion batteries, lithium polymer batteries, and other brand-new secondary batteries are preferred and commonly utilized in numerous nations, forming an industry which is growing quickly.