How to activate lithium batteries that are starving?
Many people have bad habits, often leaving electric vehicle batteries on the car when they are not at home, not turning off the air switch, and not riding for several months. When I rode again a few months later, I found that the car was out of battery and couldn't charge properly. The charger is plugged in, but it remains green even after 24 hours because the battery voltage is too low. If there is a large difference between the output voltage of the charger and the battery voltage, the charger will not be able to charge the battery.
This situation is commonly referred to as the battery starving to death. The voltage of this type of battery block is generally only around 5.6V and will not exceed 6V. For such batteries, most of them require battery replacement. But replacing a set of batteries can cost hundreds, so it's a bit regrettable, especially for batteries that have just passed warranty.
Here are five good methods to save most of these "starving" batteries. Note that most of them are not 100%.
1、 Series connection method. Connect another 12V battery with normal voltage in series on the entire battery pack. For example, if the original car had a 48V-20AH battery, we can connect another 12V-20AH battery in series. A fully charged 12V battery has a voltage of around 13V. When connected in series, it can increase the voltage of the entire battery pack, and then use its original charger to charge it. This way, the battery can be charged in. After plugging in the charger, the red light on the charger indicates that the battery can be charged in. When the charger turns green, remove the additional battery connected in series. Then just charge it normally.
2、 Parallel method. This method is slightly more complicated. For example, if the vehicle originally had a 48V-20AH battery, we will connect another set of 48V-20AH batteries in parallel. Everyone knows that the voltage across parallel circuits 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 connecting a battery in series. It also increases the voltage of the entire group.
3、 Low voltage charging method. Choose a smaller charger for charging. For example, if it is a set of 60V-20AH batteries, we use a 48V-20AH charger for charging. In most cases, it can also be charged in this way. The principle is also similar to the first one, which is to make the charging voltage closer to the voltage at both ends of the battery.
4、 Single battery charging method. Charging a single battery with a 12V motorcycle charger can activate the battery, but this type of charging is relatively slow and usually takes more than 7 hours before the battery voltage slowly returns to around 12V. If all single charging is time-consuming.
5、 Special charger method. The Tianneng charger automatically recognizes the voltage of the battery, regardless of how many volts a set of batteries has, and can charge it. For example, the original car had a 60V-20AH battery, but now it only has less than 30V, so it can still be charged inside. As the voltage increases, it fully adapts to higher order voltages before charging the battery. Tailing, Green Jia electric vehicles, and Jinpeng tricycles have been equipped with chargers from this brand.
Additionally, how to activate lithium batteries that are "starving"? Laptop battery or mobile phone battery
Battery activation on Lenovo power management software is called "power scale calibration". When using Everest to test power on a PC, there is a "design capacity" followed by a "full charge capacity". If the values of the two items are the same, the "battery loss" item below will be 0%. Generally speaking, batteries that have just left the factory or have not been maintained in a timely manner will have a "full charge capacity" smaller than the "design capacity", and the battery loss will be 1%. This means that the battery is not "fully charged", and we need to perform "full charge and discharge" (continuous charging for 12 hours or more after full discharge) to fully "develop" the "potential" of the battery. This process of full charge and discharge is called "activating the battery". Power management software such as Lenovo Thinkpad have The principle of a "power scale calibration" function is similar.
I personally think that some old technology batteries such as NiMH need to be activated. The theory of lithium batteries requires activation because a protective layer of SEI needs to be formed on the negative electrode. But this process has actually been completed in the production testing phase. I personally think that consumers' misconceptions about batteries have led to such services.
Your phone battery is starving and cannot be turned on or charged. It needs to be activated at this time! Firstly, the so-called starvation refers to the phenomenon where the battery cannot be recharged when it has been running low or has a very low charge. There are currently two ways to activate it: one is to use universal charging for about 20 minutes to activate. The second is to provide a professional power supply with a slightly higher voltage, such as 12 volts, for mobile phone repair shops to activate. Specifically, place the positive and negative poles of the power supply on the positive and negative poles of the battery for tens of seconds or even minutes to fully charge it and connect it! Finally, after activation, it can be charged directly as before. It is unknown whether it will have a significant impact on the lifespan.
Charge the instrument. If the above method does not work and the battery is not faulty, you need to activate it with a 'voltage regulator power supply'. Connect the black wire to the negative pole of the battery and the red wire to the positive pole of the battery. The charging voltage should reach 3.8V. For devices that use lithium batteries, there is no need to charge them for 12 hours the first time, which is unnecessary!
