Do you know about 18650 lithium batteries and polymer battery?

Source: 2020 - 04 - 10 20:30 hits: how much do you know about 18650 and polymer battery time? From left to right in turn as a standard 18650 lithium batteries, lu: su composite film packaging lithium ion battery, emergency power multiplier lithium ion battery is a problem: confusing unfamiliar with battery type lithium ion battery technology principle, 18650 lithium-ion batteries and lithium polymer battery is probably the most often hear two words. Many manufacturers in the promotional products, was full of praise for polymer battery in the air for 18650 battery will degenerate. This is not very strict. In fact, the principle of different types of cells are basically the same, there are positive and negative, and the electrolyte, the mainstream of the current single lithium battery rated voltage of 3. 7 V, usually cobalt acid lithium cobalt, nickel and manganese acid lithium battery anode materials ( Also known as the ternary material) , manganese acid lithium, lithium iron phosphate, etc. , generally for graphite anode materials and electrolyte is generally six lithium fluoride phosphate solution. Industry often use lithium battery cell model to determine the overall size, lithium battery can be divided into several types according to different rules, such as the classification of the high voltage lithium batteries, lithium batteries, battery discharge rate significantly ( Maximum 1 c discharge) , the proportion of the battery, More than 1 c discharge) , according to the positive electrode material of pure cobalt acid lithium batteries, the company produced the ternary lithium batteries, lithium iron batteries ( With independent intellectual property rights of manufacturer to fool iron battery) 。 Widely referred to the lithium ion battery is the main difference between the shell packaging materials, such as represented by the 18650 steel shell packaging and early aluminum shell of mobile phone battery packaging. The current mainstream is lu: su composite film packaging of the lithium ion battery, we call it a lithium polymer battery or flexible packaging. It is not difficult to identification equipment used in the battery. 18650 battery to 18 mm in diameter and thickness, to ensure that the product specification must be greater than the thickness of 18 mm, greater than 65 mm. 18650, however, relatively low cost determines its market share, so we hope can choose affordable 18650, hope light weight can also choose to lithium polymer battery. Skills 2: incomplete volume label don't know when to start, a lot of people always use big beauty, thought the battery capacity is higher, the better, but the battery capacity is so big? Mentioned above 18650 batteries, the production of imported brands highest single 18650 product capacity is 4100 mah, domestic products are hovering at 2600 mah. According to the current general identification of the total capacity to 20000 mah, for example, even using imported products also need 5 parallel process, not to mention the domestic product series parallel connection. Small and light, portable, each open 30000 mah, 50000 mah charging treasure, a look, know is to deceive people, more gas is to use the product model to mislead consumers, such as the 50000 - meter charging treasure, buy back just know, the original 50000 meters is the product model, rather than charging treasure. 18650 battery series parallel combination requires a high degree of consistency of the battery itself, if a single battery internal issues, such as battery low voltage of battery, so will drag down the rest of the battery voltage value, increase the resistance, if still use the original battery current voltage may cause thermal explosion, lu: su soft packing of polymer lithium battery that's true, but relatively steel shell encapsulation 18650 lithium-ion batteries, lithium-ion polymer battery will not explode, but inevitably happen. Therefore, products labeled the battery capacity is not the bigger the better.