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18650 battery was a legend of Tesla. Now, with the mass production of Model 3, the historical mission of 18650 battery is coming to an end. All Tesla models may replace the 21700 lithium battery. What is the reason behind this?

Lithium sulfur battery is a kind of lithium battery, which is still in the scientific research stage as of 2013. Lithium sulfur battery is a kind of lithium battery with sulfur as the positive electrode and metal lithium as the negative electrode. The elemental sulfur is abundant in the earth and has the characteristics of low price and environmental friendliness.

According to the foreign media The Verge, batteries sometimes explode. Those explosion videos are scary, but scientists and startups have been working hard to build safer batteries. They are improving the battery design and testing new materials, hoping to solve the safety problem once and for all. But every method seems to have a trap, and the most practical solution at present may be the most boring. There are three strategies to improve battery: avoid using flammable liquid as solid battery; Make the battery module fireproof; Modify the existing functional characteristics of the battery slightly. At least as far as batteries are concerned, this change may come

There are many kinds of electric boats, such as electric fishing boats, electric sightseeing boats, electric kayaks, etc., but generally speaking, they are mainly divided into two categories: unmanned model electric boats and manned practical electric boats.

There are two basic processes of internal short circuit of battery caused by metal foreign matters, as shown in Figure 1. In the first case, large metal particles directly pierce the diaphragm, causing a short circuit between the positive and negative electrodes, which is a physical short circuit.