Due to the rapid growth of renewable energy and the widespread use of smart home technology, home energy storage systems are increasingly becoming a vital component of home energy management. These systems serve as crucial energy storage devices. The durability of residential energy storage devices has been a key area of interest. This study aims to give readers with a full knowledge and reference by discussing the operating principle, common kinds, service life, and techniques to extend the service life of home energy storage systems in detail.
1. Operational principle of residential energy storage system
A home energy storage system involves the use of energy storage technologies, such as lithium batteries, sodium-sulfur batteries, and supercapacitors, to store electrical energy. This stored energy may then be released when needed, allowing for effective control and utilisation of energy inside a household.The functioning concept primarily involves the processes of energy storage and subsequent release. During the energy storage phase, the home energy storage system collects and stores electricity generated by photovoltaic power generation, wind power, and other renewable energy equipment. In the energy release phase, the home energy storage system converts the stored electricity into alternating current (AC) power using an inverter and other equipment, which can then be used to power home electrical equipment.
2. There are two prevalent categories of home energy storage devices
Currently, the primary forms of household energy storage systems consist of lithium battery energy storage systems, sodium sulphur battery energy storage systems, and super capacitors energy storage systems. The lithium battery energy storage system has emerged as the predominant form of household energy storage due to its superior energy density, extended cycle life, and less self-discharge rate, among other benefits. The sodium-sulfur battery energy storage technology is commonly utilised in specific settings due to its capacity to operate at high temperatures and its extended lifespan. Furthermore, the supercapacitor energy storage technology has garnered increasing interest owing to its notable benefits, including rapid charging and discharging properties as well as extended lifespan.
3. The lifespan of a residential energy storage device
The service life of a home energy storage system refers to the duration during which it can function properly. This is also a crucial metric for evaluating its performance. In general, the lifespan of a home energy storage system is strongly tied to the cycle lifespan of its battery. Cycle life pertains to the quantity of charge/discharge cycles a battery can undergo under certain deep drain and charging circumstances. It serves as a significant indicator of the battery's lifespan. In general, lithium batteries have a cycle life that can extend to thousands of cycles, although sodium-sulfur batteries and super capacitors have an even more remarkable cycle life.
The durability of a residential energy storage system is influenced by several parameters, including the depth of charging and discharging, temperature, rate of charging and discharging, and other similar characteristics. Repeated deep discharge and quick charging and discharging of the home energy storage system will inevitably have a negative impact on its overall lifespan. Furthermore, the elevated temperature conditions would expedite the deterioration of the battery, thereby diminishing the lifespan of the home energy storage system.
4. Methods to prolong the lifespan of a residential energy storage system
To address the issue of limited durability in household energy storage systems, many techniques may be implemented to prolong their lifespan. To optimize the battery's lifespan, it is important to establish appropriate charging and discharging levels, while avoiding frequent deep discharges. This will help decrease the number of battery cycles and ultimately increase its overall service life. Additionally, it is crucial to regulate the operational temperature of the household energy storage system and prevent prolonged exposure to high temperatures in order to mitigate the battery's rate of deterioration. Furthermore, selecting the suitable rate of charging and discharging, while avoiding frequent and fast charging and discharging, is also a crucial method for prolonging the lifespan of the residential energy storage system.
Home energy storage systems are crucial devices for managing and storing energy in residential settings.The duration of its operational lifespan has a direct impact on its performance and financial advantages. Hence, comprehending the operational mechanism, prevalent variations, and longevity of domestic energy storage systems holds immense importance in improving home energy administration and prolonging the equipment's lifespan.This document aims to furnish readers with valuable reference and guidance.
