How to maintain a lithium-ion battery pack? What are the maintenance methods? Lithium-ion battery packs are increasingly widely used in various fields today. It's important to understand how to extend the lifespan of lithium-ion battery packs and how to use them more safely. After all, lithium-ion battery packs are not cheap, and extending their lifespan as much as possible is equivalent to saving the company money.
Brief Introduction to the Principle of Lithium-ion Battery Packs
Lithium-ion battery packs are a type of battery that uses lithium metal or lithium alloy as the negative electrode material and a non-aqueous electrolyte solution. They are the batteries with the highest energy density and best overall performance among secondary battery technologies, and their market share has been increasing year by year since their inception.
Lithium-ion battery pack maintenance methods
(1) Charging
Choose a compatible charger: Selecting a charger with matching power will make the lithium-ion battery pack charge more stably and reduce the risk of accidents.
Avoid overcharging: Lithium-ion battery packs do not have a memory effect. Do not overcharge to activate the battery or to force it to remember its maximum capacity. Although most lithium-ion battery pack chargers have charging protection or similar safeguards, it's always better to develop good charging habits to extend the lifespan of your lithium-ion batteries, just in case.
(2) Discharge aspect
Besides avoiding overcharging, excessive discharging is also undesirable. Because a certain amount of lithium ions must be maintained in the negative electrode to maintain structural stability, over-discharging causes more lithium ions to migrate out, disrupting the stable structure of the negative electrode and resulting in irreversible damage.
(3) Operating temperature environment
Charging environment temperature: The optimal charging environment for lithium-ion batteries is 5 to 45 degrees Celsius. Although they can still be charged normally at 0 to 5 degrees Celsius, the charging current should be reduced accordingly (in an environment of 5 to 45 degrees Celsius) to maximize battery life.
Charging at high temperatures or above 45 degrees Celsius will reduce battery performance and may even degrade the electrolyte inside the battery. Low temperatures or below 0 degrees Celsius will increase internal resistance, leading to longer charging times. In addition, charging in an environment below 0 degrees Celsius will put the battery in a sub-frozen state, causing irreversible damage.
Discharge ambient temperature: The discharge ambient temperature of lithium-ion battery packs is generally -20℃ to 60℃. However, the performance of lithium-ion batteries generally decreases below 0℃, and the discharge capacity will decrease accordingly. Therefore, the optimal operating temperature for lithium-ion batteries is typically 0~40℃. Some specially customized lithium-ion batteries have different operating temperatures, and some can even operate normally in environments exceeding 100 degrees Celsius.
(4) Storage and maintenance
Lithium-ion batteries can be stored in a clean, dry, and well-ventilated environment with a temperature of -5 to 35°C and a relative humidity of no more than 75%. They should be kept away from corrosive substances, fire and heat sources, and direct sunlight. The batteries should not be disassembled arbitrarily. For long-term storage, the battery charge should be maintained at 30% to 50% of its nominal capacity. It is recommended that stored batteries be charged every 6 months.
(5) Do not mix lithium-ion battery packs with metal objects, so as to prevent metal objects from touching the positive and negative terminals of the battery, causing a short circuit, damaging the battery or even causing danger.
(6) Do not strike, puncture, step on, modify, or expose lithium-ion batteries to sunlight. Do not place the batteries in microwave, high-voltage, or other similar environments.
(7) Use a proper matching lithium-ion battery charger to charge the battery. Do not use inferior or other types of battery chargers to charge lithium-ion batteries.
48V lithium-ion battery pack
How to maintain a lithium-ion battery pack? The above are some key points to pay attention to when maintaining a lithium-ion battery pack. Good usage habits are very helpful in extending the lifespan of the lithium-ion battery pack. The key is to maximize the lifespan of the lithium-ion battery pack while meeting your own usage needs.
Lithium-ion batteries are consumables, and no matter what we do, we cannot prevent them from eventually aging. We can only use the right methods to slow down their aging process.
Lithium-ion battery packs boast numerous advantages, including high volumetric energy density, small size, light weight, high operating voltage, no memory effect (allowing for charging and use at any time), and environmental friendliness, making them the most advanced batteries currently available. Choosing a reputable lithium-ion battery pack brand is undoubtedly one of the guarantees for a long battery lifespan.
