Content Menu
● Characteristics of the battery itself
● Environmental factors for use
● Charging and discharging situation
● Is there any way to extend the lifespan of lithium batteries?
● FAQ
>> 1. How do I properly store a lithium battery when not in use?
>> 2. What causes a lithium battery to swell?
>> 3. Are lithium batteries safe for air travel?
>> 4. How does the charging rate affect a lithium battery?
>> 5. Can I use a non original charger for my lithium battery?
The lifespan of lithium batteries is influenced by various factors. Firstly, the depth of charge and discharge. Frequent deep charge and discharge can accelerate battery aging; Secondly, the charging and discharging rate, high current charging and discharging can cause damage to the battery; Temperature is also crucial, as high or low temperatures can affect battery performance and lifespan. High temperatures can accelerate chemical reactions inside the battery, while low temperatures can reduce battery activity; The more cycles a battery is used, the more significant the degradation of its performance; In addition, factors such as being in a fully charged or dead state for a long time, humidity in the storage environment, as well as the manufacturing process and material quality of lithium batteries themselves, can also affect their lifespan.
Characteristics of the battery itself
Electrode materials: Different electrode materials have a significant impact on the lifespan of lithium batteries. For example, lithium cobalt oxide electrode materials have high energy density, but relatively poor stability, and are prone to structural changes during charging and discharging, leading to rapid capacity degradation of the battery; Lithium iron phosphate material has a stable structure and can withstand more charge and discharge cycles, with a relatively long cycle life.
Electrolyte: High quality electrolytes should have good chemical stability, high ionic conductivity, and suitable boiling and flash points. In long-term use, if the electrolyte undergoes decomposition, oxidation, and other reactions, a passivation film will form on the electrode surface, affecting ion transport efficiency, reducing battery performance and lifespan, and the purity and impurity content of the electrolyte will also cause side reactions, accelerating battery aging.
Diaphragm: The main function of a diaphragm is to prevent short circuits caused by direct contact between the positive and negative electrodes, while allowing lithium ions to pass through. High quality separators have good mechanical strength and chemical stability. If the separator is damaged or has adverse reactions with the electrolyte or electrodes during use, it can cause internal short circuits or hindered ion transport in the battery, seriously affecting the battery life.
Manufacturing process: The environmental level, electrode cutting accuracy, welding quality, etc. during production and manufacturing can all affect the lifespan of lithium batteries. If the environmental humidity content is too high, it can easily cause battery swelling; Excessive burrs during the cutting of the polarizer may puncture the diaphragm and cause internal short circuits; The welding of the pole piece is not firm due to virtual welding, which is prone to breaking.
Temperature: High temperature can accelerate the internal chemical reaction rate of lithium batteries, reduce the stability of electrode materials and electrolytes, accelerate battery aging, and may lead to problems such as battery bulging and a sharp decrease in capacity; Low temperature can increase the viscosity of the electrolyte inside the battery, slow down the ion conduction rate, increase the internal resistance of the battery, and reduce the charging and discharging performance. Multiple low-temperature charging and discharging can also damage the battery life.
Humidity: Excessive humidity may cause problems such as short circuits, bulges, and rusting of electrode lugs in the battery, thereby affecting its service life.
Physical factors: The battery may be subjected to pressure, vibration, physical collision damage, etc., which may cause damage to the internal structure, such as electrode material deformation, diaphragm rupture, etc., thereby affecting the performance and lifespan of the battery.
Charging and discharging situation
Charging and discharging rate: High rate charging and discharging can generate a large amount of heat inside the battery, causing irreversible changes in the structure of the electrode material, while accelerating the decomposition of the electrolyte and the occurrence of side reactions, shortening the battery life; On the contrary, charging and discharging at lower rates can reduce these adverse effects and extend battery life.
Overcharging and overdischarging: Overcharging can cause damage to the structure of the positive electrode material, decomposition of the electrolyte to produce gas, increase the internal pressure of the battery, and even cause safety accidents, while seriously damaging the battery life; Overdischarge can cause lithium metal precipitation in the negative electrode material, resulting in irreversible capacity loss.
Charge and discharge depth: Shallow charging and discharging are beneficial for extending the life of lithium batteries. If the battery is frequently used to maintain a charge between 20% and 80%, the cycle life of the battery will be longer compared to using the charge to a very low or full level every time.
Charging and discharging frequency: Frequent charging and discharging will increase the number of cycles of the battery, thereby accelerating battery aging and shortening its lifespan.
Battery Management System
A high-quality battery management system (BMS) can monitor and manage the battery status in real-time, prevent overcharging or overdischarging, balance the voltage and power of each individual battery in the battery pack, and monitor parameters such as temperature and current of the battery. It can detect abnormal situations in a timely manner and take protective measures, effectively improving the efficiency and lifespan of the battery.
Is there any way to extend the lifespan of lithium batteries?
To extend the lifespan of lithium batteries, measures can be taken from multiple aspects such as charging, use, and storage. The specific methods are as follows:
Charging management
Avoid overcharging and overdischarging: Try to keep the battery level within the range of 20% -80%. When the battery level is below 20%, charge it in a timely manner. After fully charging, unplug the charger in a timely manner. Do not let the battery remain fully charged or overdischarging for a long time.
Control charging temperature: Avoid charging in high or low temperature environments. The ideal charging temperature for lithium-ion batteries is usually between 20 ℃ -25 ℃.
Choose the appropriate charger: Use original or certified legitimate chargers to ensure that the output voltage and current of the charger match the battery, and avoid using inferior or incompatible chargers.
Adopting appropriate charging methods: If the device supports it, intelligent charging mode or optimized charging function can be enabled; Avoid frequent fast charging, as fast charging can generate more heat in the battery and long-term use may accelerate battery aging.
Usage habits
Avoid high and low temperature environments: Do not expose lithium batteries to high temperature environments such as direct sunlight, near fire sources, etc. Also, try to avoid prolonged use in low temperature environments, such as using electronic products outdoors for long periods of time in cold weather.
Preventing physical damage: During use, carrying, and storage, the battery should be protected from physical damage such as collision, compression, and falling to prevent damage to the internal structure of the battery.
Reduce high-power usage: When using electronic devices, try to avoid prolonged use of high energy consuming functions, such as playing large games or using high brightness screens.
Turn off unnecessary features: When not using Bluetooth, Wi Fi, GPS, and other functions, turn them off in a timely manner to reduce battery consumption.
Storage method
Maintain appropriate battery level: If the battery needs to be stored for a long time, it should be charged to around 50% and then removed for storage.
Choose a suitable environment: Store lithium batteries in a cool, dry, and ventilated place, avoiding direct sunlight, humidity, and high temperatures, and keeping them away from sources of fire, flammable materials, and chemicals.
Regular inspection and charging: For long-term stored lithium batteries, check the battery level at regular intervals (such as one month) and recharge as needed to prevent self discharge and low battery level.
Other measures
Using a battery management system: If the device supports it, a battery management system (BMS) can be used to monitor the battery's status in real-time, prevent overcharging, overdischarging, overcurrent, etc., and extend battery life.
Maintain battery cleanliness: Regularly clean the surface and connectors of lithium batteries, remove dust and dirt, prevent pole corrosion, and maintain good conductivity.
1.Q: How do I properly store a lithium battery when not in use?
A: It is best to store a lithium battery at a 40% - 60% charge level. High or low charge levels can accelerate the battery's degradation during long term storage. Store the battery in a cool, dry place away from direct sunlight and extreme temperatures. If possible, keep it in a fire resistant container in case of any unforeseen issues.
2.Q: What causes a lithium battery to swell?
A: Swelling in a lithium battery is usually caused by internal gas generation. This can occur due to overcharging, over discharging, or exposure to high temperatures. Overcharging can cause the electrolyte to break down and produce gas. Similarly, when the battery is over discharged, the chemical reactions can become imbalanced, leading to gas formation. High - temperature conditions can also accelerate these unwanted chemical reactions that result in gas production and subsequent swelling.
3.Q: Are lithium batteries safe for air travel?
A: Lithium ion and lithium polymer batteries are generally allowed on air travel, but there are strict regulations. For carry on luggage, small consumer grade lithium ion batteries (such as those in smartphones, laptops) are usually permitted. However, the total lithium content of spare batteries is restricted. For checked luggage, the rules are more stringent, and in some cases, large lithium ion batteries, especially those in high capacity devices like some power tools, may not be allowed at all. This is to minimize the risk of fire or explosion during flight.
4.Q: How does the charging rate affect a lithium battery?
A: A high charging rate, such as fast charging, can save time but may also generate more heat. Excessive heat can accelerate the degradation of the battery over time. Although modern batteries and chargers are designed to manage heat during fast charging, frequent use of very high speed charging may slightly reduce the battery's long term lifespan compared to slower, more gentle charging methods. However, the impact is often relatively small if the charging system has proper heat management.
5.Q: Can I use a non original charger for my lithium battery?
A: It is not recommended to use a non original charger. Non original chargers may not have the correct voltage and current output specifications for your battery. Using an incompatible charger can lead to overcharging, under charging, or unstable charging, which can damage the battery, reduce its lifespan, and even pose safety risks such as overheating or fire. It's best to use the charger provided by the device manufacturer or a charger that is specifically approved for your lithium battery device.