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1. Memory effect of nickel hydrogen batteries
Both nickel hydrogen batteries and nickel cadmium batteries have memory effects, but they are much smaller than nickel cadmium batteries. So there is no need to discharge every time the battery is charged (as improper operation can damage the battery), only complete charging and discharging once every three months is needed to alleviate the memory effect.
2. Self discharge rate of nickel hydrogen batteries
Nickel hydrogen batteries account for 25-35% (monthly), nickel cadmium batteries account for 15-30% (monthly), and lithium batteries account for 2-5% (monthly). The self discharge rate of nickel hydrogen batteries is the highest, while the discharge rate of lithium batteries is extremely low compared to the other two types of batteries.
3. Charging methods for nickel hydrogen batteries
Both nickel hydrogen batteries and lithium batteries cannot withstand overcharging. Therefore, the PICKCUT control method for nickel hydrogen batteries to charge at a constant current is the best way to stop charging when the charging voltage reaches its maximum. Lithium batteries, on the other hand, are best charged using a constant current and voltage method. If charged using the nickel cadmium battery charger DV control method, it will have an impact on the service life of nickel hydrogen batteries and lithium batteries.
Introduction to the first charging method of nickel hydrogen batteries
Is it better to have a higher capacity for nickel hydrogen batteries
Different types of batteries have higher capacity and longer usage time. Setting aside factors such as volume and weight, of course, the higher the capacity, the better.
But for the same battery model, the nominal capacity (such as 600mAh) is also the same, but the actual measured initial capacity is different: for example, one is 660mAh and the other is 605mAh. So, is 660mAh better than 605mAh.
The actual situation may be that the high capacity is due to the addition of things that increase the initial capacity in the electrode material, while reducing the things used for electrode stability. The result is that after dozens of cycles of use, the high capacity battery rapidly loses capacity, while the low capacity battery remains strong. Many domestic battery manufacturers often use this method to obtain high-capacity batteries. However, after six months of use, the standby time for users is extremely poor.
The civilian AA nickel hydrogen batteries (also known as No. 5 batteries) are usually 1400mAh, but there are also standard high-capacity ones (1600mAh), and the same principle applies.
The cost of increasing capacity is sacrificing cycle life. Manufacturers cannot truly 'increase' battery capacity without focusing on modifying battery materials.
Charging method for nickel hydrogen batteries
Scientific charging methods can extend the service life of nickel hydrogen batteries.
① In general, new nickel hydrogen batteries have very little power and need to be charged before use after purchase.
But if the battery has a short factory time and sufficient power, it is recommended to use it first and then charge it. New nickel hydrogen batteries generally need to be charged and used 3-4 times before their performance can reach its optimal state.
② Although the memory effect of nickel hydrogen batteries is small, it is best to charge them after each use and fully charge them at once. Do not charge them for a while and then use them again. This is an important aspect of 'longevity'.
③ When charging, pay attention to the heat dissipation around the charger. When not in use, keep the battery clean, especially the contacts at both ends, and use a soft dry cloth to gently wipe them if necessary. If not in use for a long time, remove the battery from the battery compartment and place it in a dry environment.
④ After several months of storage, nickel hydrogen batteries will enter a "sleep" state, greatly reducing their battery life. If the nickel hydrogen battery has been left for a long time, it is recommended to charge it with slow charging first. Generally, before charging, the voltage of nickel hydrogen batteries is below 1.2V, and after being fully charged, the normal voltage is around 1.4V. This can determine whether the battery is fully charged.
Is the lifespan approaching, with a few exceptions? The overall lifespan of a car.
Batteries are a widely used chemical "power source" in the world, with advantages such as stable voltage, safety and reliability, low price, wide applicability, abundant raw materials, and high recycling and reuse rate. They are the most produced and widely used type of battery in the world.
The development of technology, the improvement of human quality of life, the crisis of oil resources, and the increasingly deteriorating ecological environment of the earth have formed a dual social background of rapid technological and industrial development in the field of new secondary batteries and related materials. The urgent demand in the market has led to the emergence of new types of secondary batteries. Among them, new types of secondary batteries such as high-energy nickel cadmium batteries, nickel metal hydride batteries, nickel zinc batteries, maintenance free lead-acid batteries, lead cloth batteries, lithium-ion batteries, and lithium polymer batteries are highly favored and widely used in China, forming an industry and developing rapidly.
Renowned companies such as Johnson Controls, Sony, Sanyo, and Hitachi have established their own battery production bases in China and gradually expanded their markets from large cities to small and medium-sized cities. Even NEC and Bosch, which mainly produce software and electrical appliances, have begun to extend their business tentacles into the field of battery production. The influx of multinational corporations has made domestic battery production enterprises face more intense competition.
In addition, with the further expansion of the ownership of cars and motorcycles in China, as well as the lifting of restrictions on the use of electric bicycles in major cities, this will further stimulate the consumption of lead-acid battery products in this field.

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