It's not very dangerous, it's just dangerous.
The fatal disadvantage of lithium batteries is that they are very dangerous. If the lithium battery is shorted internally, the external circuit of the battery is shorted or the battery is overcharged due to long charging. Over time, the nature of lithium is very active. In this case, the inside of the lithium battery will increase the pressure, and when the pressure reaches a certain level, the lithium battery shell will rupture and the internal materials of the lithium battery will break. flow out and easily cause explosion and fire. This is why at the beginning of the article, a battery car in Hangzhou exploded and caught fire while driving, causing serious burns to the father and daughter.
There are currently three types of lithium batteries for electric vehicles on the market: lithium iron phosphate batteries, lithium iron phosphate batteries,es lithium manganate and ternary series portable lithium polymer batteries. The weight of lithium batteries is only that of ordinary lead. -Acid batteries. 30% of the weight. Under the same voltage and power, lithium batteries have greater endurance. Ordinary lead-acid batteries are affected by temperature in winter, and the battery capacity drops by 30% and the cruising range is shortened. The capacity of lithium batteries is almost not affected by temperature in winter.
1. Lithium iron phosphate battery is a lithium ion battery that uses lithium iron phosphate as the positive electrode material and carbon as the negative electrode material. Lithium iron oxide batteries have the advantages of high operating voltage, high energy density, long life, good safety performance, low self-discharge rate and the absence ofmemory effect. Lithium iron phosphate batteries can be recharged 2,000 to 4,000 times. Lithium iron phosphate batteries have good application prospects.
2. Lithium manganate battery refers to a battery that uses lithium manganate material as the positive electrode. The rated voltage of lithium manganate battery is 2.5~4.2V. The advantages of lithium manganate battery are low production cost and. Security. Better and wider range of use. The disadvantage is that the number of charging cycles is small, the battery attenuation is large, and the battery is easy to inflate.
3. Ternary polymer physical battery, also known as lithium polymer battery, is a chemical battery. Compared with previous batteries, it has the characteristics of high energy, miniaturization and light weight. The ternary lithium polymer battery canbe used in the environment of minus 40 degrees to 70 degrees, but its number of cycles is only 330 times, which is similar to ordinary lead-acid batteries.