How to activate the 48V lithium iron phosphate battery pack without long-term activation? The current lithium iron phosphate battery packs are widely used, and there has been controversy about whether the 48V lithium battery pack needs to be activated. Generally, before leaving the factory, lithium batteries are activated and pre-charged by the manufacturer, so the batteries have residual power and can be used directly.
Generally, lithium batteries have the following activation process:
Activation process 1: The lithium battery pack that has just been used generally has remaining power, so do not charge it at this time. Put the battery into the product and use it normally until the power is too low to turn on at all.
Activation process 2: The first time you charge, it is best to use the original charger to charge, and it is better to turn off the charge. Many people do not turn off the charge for convenience, which is not conducive to activating the lithium battery capacity. And remind everyone to charge for 12 hours or more and 15 hours or less. If the prompt is full during this period, don't bother to unplug it, let it keep charging!
Activation process 3: After the first full charge, if it is used normally, it cannot be turned on. You can press the second procedure to continue the operation!
Activation process four: complete discharge, complete charge (ie repeat process two and process three) repeated three times. At this time, the battery is activated successfully and can reach the best capacity state.
How to activate the 48V lithium iron phosphate battery pack without long-term activation?
Regarding the "activation" problem of the 48V lithium iron phosphate battery pack, many claims are: the charging time must be more than 12 hours, repeated three times in order to activate the lithium battery pack. This statement of "charging for more than 12 hours for the first three charges" is obviously a continuation of the statement of nickel batteries. So this statement can be said to be misinformation at the beginning.
The charging and discharging characteristics of lithium iron phosphate battery packs and nickel batteries are very different, and we can tell you very clearly that all the serious formal technical materials reviewed by the editor emphasize that overcharge and overdischarge will affect the lithium battery pack. , Especially liquid lithium-ion batteries cause huge damage. Therefore, it is best to charge according to the standard time and standard method, especially not to charge more than 12 hours. Usually, the charging method described in the instruction manual is the standard charging method.
1. Tandem method
Connect another 12-volt battery of normal voltage in series to the entire battery pack. For example, if the original car is a 48V-20AH battery, then we will connect another 12V-20AH battery in series. A fully charged 12V battery has a voltage of about 13V. After being connected in series, it can increase the voltage of the entire set of lithium iron phosphate battery packs, and then use his original charger to charge it. In this way, it can be charged in and plug in the charger. After that, the charger is red, and the battery can be charged at this time. When the charger turns to the green light, remove the other battery connected in series, and then charge it normally.
2. Parallel method
For example, the vehicle used to be a 48V-20AH battery, we have another set of 48V-20AH batteries in parallel. Everyone knows that the voltage across the parallel circuit is equal, and the high voltage end will flow into the low voltage end. This method is also used by many battery dealers to detect completely dead batteries. Then charging can also achieve the purpose of charging. This principle is similar to that of a battery connected in series, which is to increase the voltage of the entire group.
3. the low voltage charging method
Choose a small one-size charger for charging. For example, if it is a set of 60V-20AH batteries, then we use a 48V-20AH charger for charging. In most cases like this, it can be charged. The principle is similar to the first one, and the charging voltage is closer to the voltage across the battery.
4. single battery charging method
Charging a single battery with a 12-volt motorcycle charger can activate the lithium battery, but this kind of charging is relatively slow. Generally, it takes more than 7 hours to charge the battery before the battery voltage slowly rises to about 12V. It takes a lot of time to charge all single blocks.
5. Special charger method
If you choose to automatically recognize the battery voltage, no matter how many volts a set of battery voltages, you can automatically recognize the voltage, and he can charge it. For example, the original car was a 60V-20AH battery, and now it only has less than 30V, it can still be charged inside. As the voltage increases, it adapts to a higher first-order voltage and then recharges the battery.
Does the lithium iron phosphate battery pack really need to be activated?
The answer is yes, the lithium iron phosphate battery pack also needs to be activated, but the lithium battery activation process is completed by the manufacturer and has nothing to do with the user, and the user has no ability to complete it. Because the battery must go through the process of filling electrolyte, forming, charging and discharging, and dividing the capacity before leaving the factory, so that the battery is in the activated state, but after leaving the factory, it takes as little as one month to one year to reach the user. Due to the influence of discharge, the battery material becomes passivated. At this time, the battery can be activated through full charge and discharge.
Now not all the protection boards of 48V lithium iron phosphate battery packs need to be activated, but some protection ICs need to be activated, and this is the old IC solution, the old IC solution, so this is necessary to make the protection board not work, In order to reduce the electrostatic discharge energy, so that the lithium battery can be stored longer. This is why the design requires charging activation.
In the use of lithium batteries, it should be noted that the battery will enter a sleep state after being placed for a period of time. At this time, the capacity is lower than the normal value, and the use time is also shortened. But the lithium battery pack is easy to activate, and it can be used after 3-5 normal charge and discharge.
The above is the introduction of the activation method of the 48V lithium iron phosphate battery pack. The initialization of the lithium battery has been completed when the battery is manufactured, and it does not need to be activated through deep charge and discharge. The current lithium iron phosphate battery does not need to be activated, it can be charged as soon as it is used.
(48V AGV Robotic Battery)
MANLY Battery Company, a professional 48V lifepo4 battery module manufacturer of lithium iron phosphate batteries, provides customized services for multi-series parallel lithium iron phosphate batteries/lithium iron phosphate power batteries. The products are widely used in electric bicycles, golf carts, electric wheelchairs, electric tools, electric toys, Solar batteries, emergency lights, solar street lights, UPS backup power supplies, and various instruments.
