1. Power tool batteries made of ordinary lithium-ion batteries
If the power tool batteries are made of ordinary lithium-ion batteries, they must meet the high-speed discharge performance to meet the working requirements of the power tool. However, due to cost and material limitations, ordinary lithium-ion batteries cannot perform high-rate discharge performance. Therefore, when people buy cheaper lithium power tool batteries in the market, they usually feel that they are fully charged and ready to use. However, after a while, it was obvious that the power of the power tool was significantly weakened, softened, and lacking power. At the same time, ordinary lithium-ion batteries have general high-temperature resistance, so the service life is relatively short.
2. Power tool batteries made of Ni-MH batteries
NiMH batteries
As a power tool battery, the energy density of nickel-hydrogen batteries is not as high as that of lithium batteries. Therefore, in the same battery pack space, the capacity of nickel-hydrogen batteries is smaller than that of lithium batteries, but the consistency of nickel-hydrogen batteries is higher than that of lithium batteries. Therefore, the safety performance of nickel-hydrogen battery packs is better than that of lithium batteries. At the same time, Ni-MH batteries can achieve a discharge capacity of more than 15%, which can fully meet the requirements of the working characteristics of electric tools. Of course, NiMH batteries are heavier than lithium batteries, but they are cheaper than lithium batteries and are more competitive in terms of manufacturing costs and market prices.
In addition, the low-temperature performance of Ni-MH batteries is much worse than low-temperature lithium iron phosphate batteries and low-temperature lithium polymer batteries. Therefore, nickel-metal hydride batteries are generally not suitable for power tool batteries in low-temperature areas.
3. Power tool battery made of lithium iron phosphate battery
Power tool battery made of lithium iron phosphate battery
Lithium iron phosphate batteries have certain advantages as batteries for power tools. Its high-temperature resistance is better than other lithium batteries. At the same time, it can achieve discharge performance above 30C. The effect is ideal under normal temperature and wide temperature environments. Compared with nickel-hydrogen batteries, its low-temperature performance and energy density are better, and its service life is longer than that of nickel-hydrogen batteries. Ni-MH batteries have a memory effect, but lithium iron phosphate batteries do not. At present, the technology of lithium iron phosphate batteries is somewhat inadequate compared with nickel-hydrogen batteries, the consistency of the batteries is relatively poor, and the safety of battery packs is slightly worse than that of nickel-hydrogen batteries.
4. Lithium polymer power tool battery
Lithium polymer power tool battery
In the battery of power tools, the use of lithium polymer should be the most expensive. Lithium polymer not only has a higher energy density but is also the best in achieving ultra-high rate discharge performance. The reason why lithium-polymer is expensive is that it uses some rare materials with high energy density, and its production and manufacturing technology requirements are relatively high. The disadvantage is that its internal high-temperature performance is slightly worse than that of iron phosphate batteries, similar to nickel-hydrogen batteries. The above is an introduction to the battery types of power tools. I believe that by comparing their advantages and disadvantages, everyone should have a preliminary understanding of which battery is more suitable for power tool batteries.
