In this paper, the battery energy storage technology is applied to the traditional EV (electric vehicle) charging piles to build a new EV charging pile with integrated charging, discharging, and storage; Multisim software is used to build an EV charging model in order to simulate the charge control guidance module.
The simulation results of this paper show that: (1) Enough output power can be provided to meet the design and use requirements of the energy-storage charging pile; (2) the control guidance circuit can meet the requirements of the charging pile; (3) during the switching process of charging pile connection state, the voltage state changes smoothly.
The ignited battery piles undergo three stages: pre-heating, self-heating, and thermal runaway, which leads to violent fire and explosion. As the SOC decreases, both the battery electrolyte leaking temperature (160~200 °C) and thermal-runaway temperature (230~280 °C) increase.
The fire protection challenge with lithium-ion battery energy storage systems is met primarily with early-warning smoke detection devices, also called aspirating smoke detectors (ASD), and the release of extinguishing agents to suppress the fires.
An electrical infrastructure for EV charging introduces new risks. Lithium-ion batteries, commonly used within EV store energy in a high density and, in event of a fire or thermal runaway, can result in a significant fire or explosion which is exceedingly difficult to control. In some cases, fires have occurred days after an incident.
The traditional charging pile management system usually only focuses on the basic charging function, which has problems such as single system function, poor user experience, and inconvenient management.