As a core means of transportation for urban and rural freight, short-distance travel and field operations, electric tricycles are widely used in people's daily travel and light logistics scenarios due to their strong bearing capacity, simple operation and low operating costs. The vehicle's overall power output, load performance and cruising stability depend entirely on the working state of energy storage cells, and cell activity is the core indicator of battery health. Cell activity refers to the migration and reaction activity of lithium ions inside lithium batteries, which directly determines the charge and discharge efficiency, available capacity, power output intensity and cycle service life of batteries. Most common battery problems such as reduced cruising range, weak load-bearing power, slow charging and sudden power jump are not caused by hardware failures, but performance degradation resulting from continuous attenuation of cell activity. Mastering cell activity maintenance and activation methods can greatly extend the service life of batteries.

　　In terms of working principles, the energy supply process of lithium battery cells relies on the bidirectional cyclic movement of lithium ions. During charging, lithium ions are deintercalated from the positive electrode, migrate through the electrolyte and embed into the negative electrode material. During discharging, lithium ions move in the reverse direction to release electric energy. When the cell activity is sufficient, ion migration is smooth and the reaction is complete, enabling the battery to fully release its rated capacity with stable power output under high and low load conditions. During long-term use, a passivation film gradually forms on the negative electrode surface, accompanied by slight electrolyte consumption, internal microstructure aging and blocked ion migration channels. These issues reduce the number of effective lithium ions participating in the reaction, continuously weaken cell activity, and eventually lead to comprehensive battery performance degradation that fails to meet the needs of heavy-load and long-distance driving.

　　Irregular working loads are the primary cause of rapid cell activity attenuation. Mostly used for cargo transportation, electric tricycles often work under long-term heavy-load climbing and high-current discharge conditions. Instant high-power output causes a sharp rise in internal cell temperature, accelerates electrolyte decomposition and passivation layer thickening, hinders ion migration and directly inhibits cell activity. At the same time, many users tend to perform deep discharge by exhausting power until the vehicle shuts down. Deep power deficit causes collapse of the negative electrode material lattice and permanent deactivation of a large number of lithium ions, resulting in irreversible damage to cell activity. Compared with conventional commuting conditions, the cell activity attenuation rate under high-frequency heavy-load and deep discharge scenarios is more than doubled, greatly shortening the normal service life of batteries.

　　Improper temperature environments and idle storage methods are key hidden factors leading to cell activity dormancy and attenuation. Lithium battery cells are extremely sensitive to temperature. Long-term outdoor exposure to high temperature and closed vehicle storage in summer accelerate the aging of internal chemical substances, disrupt the ion reaction balance and cause rapid loss of activity. In low-temperature winter environments, electrolyte viscosity increases and ion migration resistance rises, naturally reducing cell activity. Forcing heavy-load discharge and high-power charging at low temperatures easily causes lithium precipitation and permanent damage to cell activity. In addition, electric tricycles are often left idle for a long time. Long-term full-power static storage generates high-voltage stress and accelerates side reactions that consume active substances; idle storage with insufficient power puts cells in a deep dormant state. Without regular maintenance for a long time, deactivated ions cannot be recovered, ultimately leading to a significant reduction in battery capacity.

　　Non-standard charge and discharge habits continuously consume the basic cell activity and bury potential performance hazards. In daily use, long-term full-power storage, frequent high-power fast charging, and intermittent use with incomplete charging will disrupt the chemical reaction rhythm of cells, cause inconsistent activity of single cells and unbalanced cell voltage difference. In a multi-cell combined structure, once the activity of a single cell attenuates, the charge and discharge upper limit of the entire battery pack will be limited by the weak cell, resulting in reduced overall cruising range and insufficient power. Meanwhile, the use of non-original inferior chargers with unstable current and voltage output causes unbalanced charging, further aggravating cell activity differentiation, and long-term accumulation will lead to local overheating and accelerated aging of batteries.

　　In accordance with the usage characteristics of electric tricycles, scientific maintenance methods can effectively maintain and repair cell activity and delay performance attenuation. In daily operations, avoid continuous heavy loads and rapid acceleration, maintain stable and uniform discharge as much as possible, and reduce damage to active substances caused by high-current impact. Follow the principle of shallow charging and shallow discharging, keep the daily power level between 20% and 80%, fully charge the battery only before long-distance and heavy-load operations, cut off the power in time after full charging, and avoid long-term floating charging. In terms of seasonal maintenance, avoid charging under high temperature and direct sunlight in summer, prioritize charging at room temperature in winter, reduce high-intensity operations in extreme weather, and stabilize cell ion activity.

　　For batteries left idle for a long time with slightly dormant activity, standard cyclic activation can restore their working state. Complete a full standardized charge and discharge cycle every two to three months, slowly release the remaining power and then perform low-power full charging with static voltage stabilization. This process can effectively dredge ion channels, awaken dormant active substances, balance the activity difference of each single cell, and prevent the overall performance from being dragged down by a single weak cell. Meanwhile, rely on the balanced protection function of the battery management system to correct cell voltage difference in real time, ensure synchronous activity of the entire cell pack. Adhering to regular activity maintenance can keep batteries in a long-term healthy working state, stabilize the power and cruising performance of electric tricycles, reduce replacement costs and improve the long-term application value of equipment.