Lithium batteries in electric vehicles have good low voltage. According to relevant public information, although high-voltage lithium batteries charge quickly, they are more likely to heat up, require better heat dissipation, and have a relatively short lifespan. Low-voltage lithium batteries charge slowly, but are more stable and have a longer lifespan, making them more suitable for electric vehicles. Lithium battery is a type of battery that uses lithium metal or lithium alloy as positive/negative electrode materials and uses non-aqueous electrolyte solution.
A 20-cell lithium battery refers to a battery composed of 20 single lithium batteries, where the voltage of each battery is 3.7 volts. Therefore, the total voltage of 20 lithium batteries is 20 * 3.7 = 74 volts.
And 21 volts is avoltage value, and there is no corresponding specific definition for lithium batteries.
On the other hand, a voltage of 42 volts can be expressed as a higher voltage lithium battery. High-voltage lithium batteries are widely used in some high-performance electric equipment and vehicles. High-voltage batteries generally offer higher energy density and power output, but require proportionately higher voltage levels and more complex battery management systems to ensure safety.
In lithium battery applications, voltage is one of the important parameters of the battery. Different devices have different voltage requirements, and you should choose a battery with appropriate voltage level according to actual usage scenarios and needs. Therefore, there is a significant voltage differencecative between a 20-cell lithium battery and a 42-volt lithium battery, and the specific application depends on the needs of the device.