The structural characteristics of home energy storage batteries mainly revolve around their core components, aiming to achieve safe energy storage, efficient conversion, and intelligent management. Their typical structure includes the following key parts:

Battery Pack: As the core unit for energy storage, it typically uses lithium-ion batteries (such as lithium iron phosphate batteries, LiFePO₄) due to their advantages such as high energy density, long cycle life, and good safety. The battery pack is composed of multiple individual cells connected in series and parallel, and is equipped with a Battery Management System (BMS) to ensure safe operation.

Battery Management System (BMS): Responsible for monitoring the operating status of the battery pack, including key parameters such as voltage, current, temperature, and remaining charge (SOC). The BMS can achieve battery balancing, overcharge and over-discharge protection, temperature control, and fault alarms, and is a core intelligent component that ensures battery safety and extends its service life.

Energy Storage Inverter: Responsible for bidirectional conversion between direct current (DC) and alternating current (AC). During charging, it converts AC power from photovoltaic modules or the grid into DC power to charge the battery; during discharging, it converts the DC power stored in the battery back into AC power to power household appliances.

System Controller and Intelligent Management Unit: Integrates an Energy Management System (EMS) that intelligently schedules charging and discharging strategies based on electricity prices, demand, and generation status to achieve optimization goals such as peak shaving and valley filling, and improving self-consumption rates.

Safety and Auxiliary Components: Includes circuit breakers, fuses, cooling systems (such as air cooling or liquid cooling), and cabinet/rack structures to provide electrical protection, temperature management, and physical protection to ensure stable and reliable system operation.

Household energy storage battery systems are typically classified as grid-connected, off-grid, and integrated (grid-connected and off-grid combined). Grid-connected systems can interact with the public grid, and surplus electricity can be fed into the grid; off-grid systems operate completely independently and are suitable for areas without electricity; integrated systems combine the advantages of both, automatically switching to off-grid mode during grid outages to ensure power supply to critical loads.