Generally, the so-called lithium batteries that we commonly use, such as those in cell phones and cameras, are internally divided into two parts. One is the battery body and the other is the lithium battery protection circuit board. The card affects the voltage and battery voltage. There are corresponding protections for current and temperature, because lithium batteries are too delicate and will be damaged if charged above 4.2V and discharged below 3.6V.
< p> Many fake batteries do not have protective plates. When overcharged, the battery cell body will swell and explode in severe cases, which is dangerous, so everyone should choose real batteries.Now. on the market One type of lithium iron phosphate battery is safe from overcharge, overdischarge and high temperature, it can donc protect the card in a dangerous manner. This is what BYD calls iron battery
. Lithium-ion batteries The internal side reactions are very complex During the manufacturing process of lithium batteries, several testing methods are required, such as: measuring the capacity loss after the battery usage. left aside for a while; measure the K value over a period of time, positive and negative electrode materials, electrolyte type, separator thickness type, storage time, storage conditions and initial test voltage, etc.
In addition to the above various measurements, when assembling the battery, it is also necessary to predict the battery cells, then assemble the battery, determine the battery and the factory capacity, and finally to test the battery self-discharge. , many factors affect thetodischarge the battery in this process. If the self-discharge is too great, the irreversible loss of battery capacity will be significant. Therefore, the battery can be put aside for at least a quarter and then. re-capacity If the capacity does not decrease significantly, it is considered that there is no problem.
Notes:
1. Lithium-ion batteries can be stored in a clean, dry and ventilated area with an ambient temperature of -5°C to 35°C and relative temperature. humidity not exceeding 75%. Indoors, avoid contact with corrosive substances and keep away from fire and heat sources. The battery power remains between 30 and 50% of the nominal capacity.
2. To charge lithium-ion batteries, a dedicated lithium-ion battery charger must be used. Lithium-ion batteries are charged using the CC/CV (constant current + constant voltage) method, which ifsignifies first. charging with constant charging Current is charged and when the voltage reaches 4.2 V*n, it switches to constant voltage charging and charging stops when the current decreases to 0.01 C.
3. Do not heat the battery or throw it into water or fire. Putting the battery in water will cause battery failure. Ignition will cause the battery to rupture.
4. Do not disassemble the battery or try to penetrate the battery with sharp objects, as the electrolyte inside the battery will damage skin and clothing.
Reference for the above content: Baidu Encyclopedia - Serial connection
Reference for the above content: Baidu Encyclopedia - Lithium battery