New energy vehicle battery packs consist of multiple batteries stacked in series. With the development of new energy vehicles, there are also more and more innovations in new energy vehicle batteries. So today, let's take a look at the different types of new energy vehicle batteries.
Types of batteries for new energy vehicles
1. Lead-acid batteries
Lead-acid batteries, as a relatively mature technology, remain the only battery suitable for mass production of electric vehicles due to their low cost and high discharge rate. However, lead-acid batteries have very low specific energy, specific power, and energy density, making it impossible for electric vehicles powered by them to achieve good speed and driving range.
2. Nickel-cadmium batteries and nickel-metal hydride batteries
While outperforming lead-acid batteries, nickel-metal hydride (NiMH) batteries contain heavy metals and can pollute the environment if used and discarded. NiMH batteries are just entering maturity and are currently the only battery system used in hybrid vehicles that has been practically verified and commercialized on a large scale. They currently account for 99% of the hybrid battery market share, with Toyota's Prius being a prime example of commercialization.
3. Lithium batteries
Traditional lead-acid, nickel-cadmium, and nickel-metal hydride batteries are technologically mature, but their use as power batteries in automobiles presents significant problems. Currently, an increasing number of automakers are choosing lithium-ion batteries as the power source for their new energy vehicles.
Lithium-ion power batteries have the following advantages: high operating voltage (3 times that of nickel-cadmium and nickel-hydrogen batteries); high specific energy (up to 165Wh/kg, 3 times that of nickel-hydrogen batteries); small size; light weight; long cycle life; low self-discharge rate; no memory effect; and no pollution.
4. Lithium iron phosphate battery
Lithium iron phosphate batteries are also a type of lithium battery, with a specific energy less than half that of lithium cobalt oxide batteries. However, they offer high safety, can cycle up to 2000 times, have stable discharge, and are inexpensive, making them a new choice for automotive power. However, improper use can ultimately lead to the entire battery pack malfunctioning or even becoming unusable, significantly impacting battery lifespan and reliability.
