Introduction Of Power Tool Batteries
- Ni-MH battery
The energy density of nickel-hydrogen battery as a power tool battery is not as good as that of lithium-ion batteries. Therefore, in the same battery pack space, the capacity of nickel-hydrogen batteries is smaller than that of lithium-ion batteries, but nickel-hydrogen batteries are safer than lithium-ion batteries. Better, at the same time, the nickel-metal hydride battery can achieve 15C rate or higher rate discharge capacity, which can fully meet the requirements of the working characteristics of electric tools. Of course, nickel-hydrogen batteries are relatively heavy in relation to lithium-ion batteries, but they are lower than lithium-ion batteries in terms of manufacturing costs and market prices, and they are still relatively competitive.
However, the low-temperature performance of Ni-MH batteries is relatively poor, and Ni-MH batteries have problems such as self-discharge and memory effects, resulting in an extremely low market share in Cordless tool batteries.
2. Lithium-ion battery
Lithium-ion batteries for power tools must meet high-rate discharge to meet the high-current working requirements of power tools. However, due to cost and material limitations, lithium-ion batteries cannot provide high-rate discharge performance, so the price everyone buys on the market When using a relatively cheap lithium power tool battery, it often feels like this. It is okay to use it when it is fully charged, but after a while, it is obvious that the power of the power tool has dropped significantly. At the same time, ordinary lithium-ion batteries have general high temperature resistance performance, so the service life is relatively shorter.
3. Lithium iron phosphate battery
Lithium iron phosphate battery has certain advantages as a power tool battery. Its high temperature resistance is better than other types of lithium ion batteries. At the same time, it can achieve a discharge performance of more than 30C. It has an ideal effect when used in a normal temperature and wide temperature environment. Compared with nickel-hydrogen batteries, its low-temperature performance and energy density are relatively much 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. The current good high-temperature performance and high-rate discharge capability of lithium iron phosphate batteries, as well as a cycle life of up to 2000 times, can be expected in the future.
