As a crucial component of the modern energy system, the operational reliability of energy storage systems directly impacts grid security and the efficiency of new energy consumption. Since energy storage devices often operate continuously in complex electrical and thermal environments, scientific routine maintenance is not only fundamental to extending their lifespan but also essential for preventing potential risks and maintaining high performance. Establishing a systematic and standardized operation and maintenance mechanism has become an industry consensus.
The primary aspect of routine maintenance is condition monitoring and data acquisition. Utilizing battery management systems (BMS), energy management systems (EMS), and environmental monitoring devices, key parameters such as voltage, current, temperature, and internal resistance should be collected in real time, paying attention to temperature rise trends and individual cell imbalances. Regularly comparing historical data can promptly detect performance degradation or abnormal signs, providing a basis for preventative maintenance. The monitoring platform should ideally possess alarm and trend analysis functions to ensure that abnormal information is transmitted to maintenance personnel immediately.
Environmental condition control is equally critical. Energy storage compartments or containers should maintain good ventilation and temperature control, avoiding high temperatures, high humidity, dust, and corrosive gases that could damage the equipment. Especially for electrochemical energy storage, temperatures deviating from the optimal range will accelerate aging and increase safety risks. Regular checks of the operating status of air conditioners, cooling fans, and heating devices are necessary. For outdoor systems, the effectiveness of waterproof seals, anti-condensation measures, and lightning protection grounding should also be reviewed to ensure external environmental factors are within a controllable range.
Inspections of electrical connections and mechanical structures are crucial. Busbars, cable joints, fuses, and other components should be regularly checked for tightness and contact resistance to prevent overheating or even arcing due to loosening or oxidation. Visual and torque checks of battery module mounting brackets and cabinet vibration-damping components can prevent mechanical damage caused by vibration or displacement. Furthermore, the integrity of fire protection and security facilities must be periodically verified, including detector sensitivity, extinguishing agent levels, and the accessibility of emergency exits.
Cleaning and maintenance should be scheduled according to operating conditions. Dust accumulation affects heat dissipation efficiency; dust removal must be performed only after ensuring a safe power outage. Cooling system filters should be cleaned or replaced according to regulations to maintain airflow. For systems undergoing long-term shutdowns, charge/discharge balancing and capacity calibration procedures should be implemented to prevent deep cell depletion or inconsistency degradation.
Personnel competence and adherence to procedures are fundamental guarantees of quality care. The maintenance team must receive professional training, be proficient in emergency response procedures and the use of testing instruments, and strictly adhere to inspection, record-keeping, and shift handover procedures. Through standardized operations and continuous skills enhancement, routine care can be transformed into a solid barrier for the highly reliable operation of energy storage systems, enabling them to play a more stable and sustainable supporting role in the energy transition process.