Lithium Battery Knowledge
The charger of the lithium iron phosphate battery is different from the general lithium ion battery. The highest terminal charging voltage for lithium-ion batteries is 4.2V, and the highest terminal charging voltage for lithium iron phosphate batteries is 3.65V. It is recommended to charge the lithium iron phosphate battery using the CCCV charging method, that is, first constant current and then constant voltage. The recommended constant current is 0.3C. The recommended constant voltage is 3.65V. That is, 0.3C current charging in the constant current process, when the battery voltage reaches 3.65V, use 3.65V voltage constant voltage charging, when the charging current is lower than 0.1C (or 0.05C), stop charging, that is, the battery has overflowed.
18650 lithium battery is a kind of lithium ion battery commonly used in electronic products, and is often used as a battery in laptop batteries. We found that the 18650 lithium-ion battery sometimes cannot be charged while using it. Let us explain why.
The world's first lithium-ion battery was born in the United States in March 1976. An oil company engineer uses metallic lithium as the positive electrode and titanium sulfide as the negative electrode. Relying on the movement of lithium ion positive and negative electrodes, current is formed inside the battery to complete the charging and discharging process, and interact with the outside world to form electrical energy.
In daily life, lithium-ion batteries can be found almost everywhere, from electric cars to computer motherboard batteries. Lithium-ion batteries have become an indispensable part of people. We often see various safety accidents caused by lithium-ion batteries. The most impressive is the explosion and fire of lithium-ion batteries. The common causes of fires in lithium-ion batteries are as follows.
According to Tom Hartley, a professor of electrical engineering at the University of Akron, the more the battery is fully charged, the greater the loss of the battery. Lithium-ion batteries work best in a medium charge state, in which case the battery life is the longest.
Driven by the strong social development needs and huge potential market, lithium-ion battery energy storage technology is developing in the direction of large-scale, high efficiency, long life, low cost, and pollution-free. Lithium-ion battery energy storage is currently the most feasible technical route.
The newly bought lithium-ion battery can be charged first. Generally speaking, lithium-ion batteries can be activated within a few hours and then used. When the remaining power of the lithium-ion battery is insufficient, the lithium-ion battery shall be charged in time instead of waiting until the power is completely exhausted. Generally, when the system indicates that the power is insufficient, it needs to be charged as soon as possible.
Obviously, 18650 lithium ion battery has the characteristics of high energy density, large capacity, no memory effect and long service life.
Will Li-ion batteries explode if they are overcharged? Speaking of battery explosion, the first thing that comes to mind is the explosion of lithium-ion batteries. Many people think that lead-acid batteries will not explode. Compared with lithium-ion batteries, lead-acid batteries are slightly safer, but there are also many explosions. The current market competition is extremely fierce. In order to reduce the cost of batteries, some unscrupulous businesses use inferior plates, which can easily cause short circuits and even cause batteries to catch fire and explode.
Method 1: Check the appearance and packaging
Method 2: Look at the product battery
Method 3: Test live working
Method 4: compare weight
Method 5: Detect internal resistance and maximum current