Power Battery and Battery PACK Basic Knowledge

This document provides foundational knowledge of power batteries and battery packs, focusing on lithium-ion technology. It covers essential battery terminology including voltage types such as open circuit voltage, working voltage, discharge cut-off voltage, and charge limit voltage, with comparative data for lead-acid, nickel-cadmium, nickel-metal hydride, and lithium batteries. Key concepts like battery capacity (Ah), internal resistance (mΩ), load capability, internal pressure, and charge/discharge rate (C-rate) are explained. The document also defines over-discharge, overcharge, state of charge (SOC), depth of discharge (DOD), and self-discharge rate, highlighting factors affecting battery performance and lifespan. This guide is essential for understanding the electrical characteristics and operational parameters of power batteries used in new energy applications.