Correct charging method for lithium battery packs
1. Charge according to the standard time and procedure, even for the first three times;
2. When the machine displays a low battery warning, you should start charging it as soon as possible;
3. Activating the lithium battery pack does not require any special method; it will activate naturally during normal use of the machine. Insisting on using the widely circulated method of charging for 12 hours three times during the first three charging sessions will actually be ineffective.
4. Take precautions against fire when using lithium batteries. Always protect lithium battery packs from water and moisture. After all main units are no longer in use, remove the lithium batteries and store them properly in a dry, cool place to prevent fires caused by improper use.
Precautions when charging lithium battery packs
1. Charge in a timely manner
Lithium battery packs should be charged as soon as possible after use to keep the battery fully charged.
2. Periodic deep discharge
Performing a deep discharge periodically on a lithium battery pack can also help "activate" the battery, slightly increasing its capacity. A common method is to periodically perform a complete discharge of the battery.
3. Use the original charger whenever possible.
Generally, avoid changing the charger if you are not sure, as this will reduce the lifespan of the lithium battery pack.
With the implementation of the new national standard for electric vehicles, the stricter technical requirements are forcing the industry to accelerate its lithium battery adoption process.
In recent years, there has been an increasing number of lithium-ion electric vehicles on the market.
Although both are electric vehicles, lithium batteries and lead-acid batteries have different properties, resulting in some differences in daily maintenance and charging. This time, let's take a look at the charging methods and precautions for lithium battery electric vehicles.
Lithium battery charging methods and precautions
★ Reasonable control of charging frequency
To avoid charging the battery only when it is low on voltage, lithium batteries should be kept in a shallow cycle state. This will greatly improve the lifespan of lithium batteries. Therefore, try to perform shallow discharge and frequent charging.
★Good charging environment
Choose a dry, well-ventilated, and cool environment for charging whenever possible. Never charge the battery or electric vehicle in direct sunlight. Whether charging or not, keep away from open flames and high-temperature heat sources to prevent overheating and potential battery explosion.
★ Chargers should be specifically designed for your vehicle.
In fact, when choosing a charger, you should avoid mixing and matching lithium batteries and lead-acid batteries. Especially for lithium battery chargers, you should also make sure that the current is compatible with the voltage and use the original charger whenever possible.
★ Avoid storing with low battery
Sulfation easily occurs when the battery is under discharged conditions. Lead sulfate crystals adhere to the plates, blocking ion channels and leading to insufficient charging and reduced battery capacity. The longer the battery is left idle in a discharged state, the more severe the damage. Therefore, if the battery is not used for an extended period, it should be recharged once a month to maintain its health.
Different people have different opinions on how to charge lithium batteries. Do you know whether your charging method is correct or incorrect?
The correct way to charge lithium batteries is to "shallow discharge and shallow charge," avoiding fully depleting the battery before recharging, and also avoiding charging at high or low temperatures. Let's take a closer look.
Lithium battery charging methods
1. Shallow discharge and shallow charging
When charging lithium batteries, it is recommended to use a "shallow discharge and shallow charge" method. This means that charging and discharging should not reach the battery's maximum capacity. The charging goal is "not to fully charge, and not to fully discharge." Lithium batteries should be charged normally when their charge level is between 10% and 90%. Once fully charged, they are ready to use. The number of charging cycles has no direct relationship with the lifespan of a lithium battery, so adhering to the "shallow discharge and shallow charge" method and charging when necessary is ideal.
2. How to charge a new lithium battery?
There is no such thing as "the first charge must be 18 hours" when charging a new battery. This practice does not activate the battery charger and may even damage the battery. For lithium battery chargers, overcharging will only cause immeasurable damage. Therefore, new lithium batteries can be charged using the normal charging method.
3. How to use a lithium battery charger
Lithium batteries have a lifespan of nearly 500 cycles. Charging them with a charger to increase their capacity within this lifespan does not significantly damage the charger itself. Therefore, the charger's lifespan is not directly related to the number of charging cycles, and using a "shallow discharge, shallow charge" method has no serious harmful effects on the charger.
4. Precautions
(1) Do not charge at high temperatures.
Charging devices at temperatures above 35 degrees Celsius can cause significant damage to the battery. Even storing batteries in high-temperature environments can negatively impact their quality. Therefore, avoiding charging lithium batteries in high-temperature environments helps extend their lifespan.
(2) Cannot be charged at low temperatures.
Using lithium batteries in ultra-low temperature environments (4 degrees Celsius) will shorten the battery's lifespan. Some lithium batteries cannot be charged in low-temperature environments because they have built-in protection functions.
(3) Select a suitable charging temperature
Lithium battery charging temperature range: 0~45 degrees Celsius, lithium battery discharging temperature range: 0~60 degrees Celsius.
(4) Avoid overshoot
Overcharging of lithium-ion batteries must be avoided during the charging process. Any form of overcharging will severely damage the battery performance and may even cause it to explode.
(5) No activation is required for the first charge; standard charging time.
Lithium batteries and nickel batteries have very different charging and discharging characteristics. The charging time must not exceed 12 hours. Repeat this process three times. Charge according to the standard time and standard method. In particular, do not charge for more than 12 hours.
In summary, the lifespan of lithium batteries is generally 300-500 charging cycles. Within this period, adhering to the principle of "shallow discharge and shallow charge," avoiding charging at high or low temperatures, and mastering the correct charging methods will allow lithium batteries to last longer.
Lithium-ion battery electric vehicles, also known as lithium-ion battery electric vehicles, refer to electric vehicles equipped with lithium-ion batteries. In recent years, the environmental problems caused by traditional internal combustion engine vehicles and the scarcity of petroleum resources have led people to focus on new energy vehicles. Pure electric vehicles, with their ability to truly achieve "zero emissions," have become an important direction for the development of electric vehicles. Lithium-ion batteries, with their superior performance, have become the ideal power source for the next generation of electric vehicles.
Electric vehicles have now entered thousands of households and become an essential means of transportation for many families. Taking the commonly used lithium-ion battery in electric vehicles as an example, this article summarizes some methods and precautions for charging and discharging lithium-ion batteries in electric vehicles. Let's take a look.
Correct charging method for electric vehicle lithium batteries
1. When charging lithium batteries for electric vehicles, it is best to follow the charging instructions in the datasheet. If not, you need to calculate the charging time based on the capacity of the lithium battery and the current of the charger. For example, a 48V/20A lithium battery with a 5A charger will take a little over 4 hours to charge, a 10A charger will take a little over 2 hours, and a 20A charger will take one hour.
2. Generally, newly purchased electric vehicle lithium batteries are new and have a large capacity, so they will take longer to charge, reaching more than 10 hours without changing the charging indicator. This will gradually decrease, reducing to 6 hours after about 2 months, and then remaining constant for about 6 months. The battery capacity will continue to decline, and after 1 year, it can be fully charged in 3-4 hours. Of course, the battery will be about time to be replaced or require maintenance.
3. After buying the car, the lithium battery should have about 80% charge. You should charge it as soon as you get home. The charging time should be 4 hours after the charger indicator light changes. Do this three times.
4. Do not charge the lithium battery of an electric vehicle for too long; one hour after the charger indicator light changes is ideal. It's better to undercharge than overcharge, otherwise the battery may swell and bulge due to dehydration, causing irreparable damage to the lithium battery.
5. If possible, swap the individual cells in the entire electric vehicle lithium battery pack. For batteries past their warranty period, add 3-4 ml of deionized water to each individual cell every three to four months.
6. The discharge port and charging port of the entire electric vehicle lithium battery pack should be kept clean at all times to prevent copper rust from forming at the contact points, which could cause poor contact, overheating, and damage.
7. Before the first charge, the lithium battery of an electric vehicle should be fully charged, but not completely drained. When you first buy an electric vehicle, the battery level won't be too high or too low, unless it's an old or low-quality battery. When using it, you should estimate the approximate range based on the seller's estimate to avoid running out of power or overcharging.
