-What is the relationship between AH and voltage of lithium batteries?

What is the relationship between AH and voltage of lithium batteries?
author:enerbyte source:本站 click345 Release date: 2023-10-09 08:40:02
abstract:
What is the relationship between AH and voltage of lithium-ion batteries? The energy carried by lithium-ion batteries is expressed in wh, where wh=voltage (v) * ah For example, if the standard discharge voltage of a lithium-ion battery is 4.2 and the lithi...

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What is the relationship between AH and voltage of lithium-ion batteries?

The energy carried by lithium-ion batteries is expressed in wh, where wh=voltage (v) * ah

For example, if the standard discharge voltage of a lithium-ion battery is 4.2 and the lithium-ion battery is 42wh, it is 10ah. That is, after discharging at a current of 10a for 1 hour, the voltage is lower than the available voltage limit. This means that the battery can operate for 1 hour under a load of 42w. In theory, if the load power is 84w, the battery can only operate for half an hour. In fact, the higher the discharge power, the higher the battery resistance consumption, and the shorter the available time

Capacity=discharge current * operating time, in AH, 65AH capacity generally refers to 1A discharge current that can work for 65 hours. However, batteries are not only standard capacity, but also standard voltage. The voltage of lithium-ion batteries is 3.7v (4.2v is full voltage, but the voltage will decrease after operation, with an average voltage of about 3.7v). As you said, if the voltage of a 65AH battery is 3.7, that is to say, 1A can discharge 65H at a supply voltage of 3.7v. If it is changed to 12.6V, a single battery cannot work, and it must be a 3.7V (4.2) and 65AH battery in Series III to work. The goals of these three batteries are 11.4V (or as you say 12.6V) and 65mAh.

By the way, the voltage of lithium-ion batteries is 4.2v. If you want to obtain a higher voltage, you should connect more identical units in series and connect more identical units in parallel. If you want to obtain a higher capacity (provided that voltage balance protection is done well).

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