How to activate the lithium battery when it "starves to death"?



Many people have bad habits, often people do not put the electric car battery at home, the air switch does not turn off, put a few months do not ride. When I came back for a few months, I found that the car had no power and could not be charged. The charger is plugged in, but it is always green, even if it is plugged in 24 hours, it is still green, because the battery voltage is too low, and the difference between the charger output voltage and the charger output voltage is too large, the charger is unable to flush the electricity into the battery.            This is what we usually call "starvation" of batteries. The voltage of this kind of battery is only about 5.6v, not more than 6V. For such batteries, most of them are replaced. But it's a pity to replace a battery with hundreds of batteries, especially the batteries just under warranty.            Here are five better ways to save most of these "starving" batteries. Note that most are not 100%.            1、 Series method. Another 12 volt battery with normal voltage is connected in series on the whole battery. For example, the original car is a 48v-20ah battery. Then we connect another 12v-20ah battery in series. A 12V battery with sufficient power has a voltage of about 13V. After being connected in series, the voltage of the whole battery can be increased, and then the original charger can be used for charging. In this way, the battery can be charged in. After the charger is plugged in, the charger is red. At this time, the battery can be charged in. When the charger turns green, remove the battery connected in series. Then charge it normally.            2、 Parallel method. This method is a little more troublesome. For example, the vehicle used to be a 48v-20ah battery. We connected another group of 48v-20ah batteries in parallel. We all know that the voltage in parallel circuit is equal, the high voltage terminal will flow into the low voltage terminal. This method is also used by many battery dealers in the detection of completely dead batteries. Then charging can also achieve the purpose of charging. This principle is similar to that of connecting a battery in series. It is also to raise the voltage of the whole group.            3、 Low voltage charging method. Choose a small charger for charging. For example, a set of 60v-20ah batteries, then we use a 48v-20ah charger for charging. In most cases, it can also be filled. The principle is similar to that of the first one. The charging voltage is closer to the voltage at both ends of the battery.            4、 Single battery charging method. Charging a single battery with a 12 volt motorcycle charger can activate the battery, but this kind of charging is relatively slow. Generally, it takes more than 7 hours to charge, and the battery voltage will slowly rise to about 12V. If all single blocks are charged, it will take a long time.            5、 Special charger method. Tianneng charger can automatically identify the battery voltage. No matter how many volts a group of batteries have, it can automatically identify the voltage. It can be charged in. For example, the original car is a 60v-20ah battery, and now it has less than 30V, so it can still be charged inside. With the increase of voltage, it can fully adapt to the higher voltage, and then charge the battery. Tailing, Lvjia electric vehicle and Jinpeng tricycle have been equipped with chargers of this brand.            In addition, how to activate the "starved" lithium battery? Laptop battery or cell phone battery            Battery activation is called "power scale calibration" on Lenovo's power management software. When Everest is used to test the power supply at the PC end, there is a "design capacity" followed by the "full charge capacity". If the values of the two items are the same, the next "battery loss" item will be seen as 0%; generally speaking, the "full charge capacity" of batteries that have just left the factory or have not been maintained in time for a long time will be less than the "design capacity", and then the battery loss will be seen The cost is 1%. This means that the battery is not "fully charged". We need to conduct "full charge and discharge" (uninterrupted charge 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 "activation battery". The power management software of Lenovo ThinkPad has a "power scale calibration" function similar to the principle.            I think some old technology batteries such as NIMH need to be activated. The theory of lithium battery needs to be intensified because a protective layer of SEI needs to be formed at the negative electrode. But this process has actually been completed in the production test phase. I think that consumers have such services due to the misunderstanding of batteries.            Your cell phone battery is starving. It can't be turned on and charged. You need to activate it at this time! First of all, the so-called starvation is the phenomenon that the battery can not be recharged when the battery has been dead or the power is very low. Then there are two ways to activate: one is to use universal charging for about 20 minutes. The second is to activate the mobile phone repair shop with a professional voltage of a little higher, such as 12 V power supply. Specifically, put the positive and negative poles of the power supply on the positive and negative poles of the battery for tens of seconds or even a few minutes to power it up and open it up! Finally, after activation, it can be charged with direct charging as before. It is not known whether it will have a significant impact on the service life.            Charge the instrument. (if the above method is not working and the battery has no fault, it needs to be activated by "regulated power supply", with black wire connected to the negative pole of the battery, red wire connected to the positive pole of the battery, and the charging voltage reaches 3.8V, that is OK.) it is unnecessary to use the lithium battery device for the first time without charging for 12 hours!