The main difference between them is the electrolyte. Liquid lithium-ion batteries use liquid electrolytes, while lithium-ion polymer batteries use solid polymer electrolytes instead. This polymer can be in the “dry” state. It can also be. “colloidal”. Currently, most of them use polymer gel electrolytes.
Lithium polymer battery classification: Solid: The electrolyte of the solid polymer electrolyte lithium ion battery is a mixture of polymer and salt. This type of battery has high ionic conductivity at normal temperature and can be used at normal temperature. .
Gel: The gel polymer electrolyte lithium-ion battery adds a plasticizer and other additives to the solid polymer electrolyte to improve ionic conductivity. Since the liquid electrolyte is replaced by a solid electrolyte, it is different from liquid lithium. baionic ttry. In comparison, lithium-ion polymer batteries have the advantage of being thinner, of any area and shape, so the battery case can be made of aluminum composite film -plastic, which can improve the specific capacity of the entire polymer battery; Lithium-ion batteries also contain polymers that can be used as cathode materials, and their specific energy density will be more than 20% higher than that of current liquid lithium-ion batteries. Lithium-ion polymer batteries (polymerLithium-IonBattery) have the characteristics of miniaturization, thinness and lightness. Therefore, polymer batteries will gradually increase their market share. Lithium-ion batteries currently include liquid lithium-ion batteries (LIBs) and polymer lithium-ion batteries (pLBs). Among them, liquid lithium-ion batteries arereferring to secondary batteries in which the integrated Li+ compounds are the positive and negative electrodes. The positive electrode uses lithium compounds LiCoO2, LiNiO2 or LiMn2O4, and the negative electrode uses a lithium-carbon interlayer compound LixC6. The typical battery system is as follows: the principle of lithium-ion polymer battery is the same as that of liquid lithium. that the electrolyte is different from liquid lithium. The main structure of the battery consists of three elements: a positive electrode, a negative electrode and an electrolyte. The so-called lithium-ion polymer battery means that at least one or more of the three main structures use polymer materials as the main battery system. In currently developed lithium-ion polymer battery systems, polymer materials are mainly used in the positive electrode and electrolyte. The cathode material includes polymconductive or inorganic compounds used in lithium-ion batteries in general. The electrolyte may use solid or colloidal polymer electrolytes, or organic electrolytes. Typically, lithium-ion technology uses liquid or colloidal electrolytes, so it requires robust secondary packaging. containing flammable active ingredients adds weight and limits dimensional flexibility.
(Images/Text/Photos: Questions/Answers from Pacific Automotive Network)
Calculate the parameters by yourself, the principle is as follows:
p>1 .... When not fully charged, the voltage on R2 is low and is not enough to drive the bases ZD1 and Q2, so Q2 is cut off.< /p>
Since Q2 is not conducting, the voltage on R4 is 0. ?The base Q1 has no voltage, Q1 is cut
At this moment, D1 is turns on and D2 turns off.
2....When fully chargedAfter that, the voltage of thebattery increases, the voltage on R2 increases, bases ZD1 and Q2 are on, Q2 is on and voltage and current are generated on R4.
Q1 is on, D1 is on. turns off and D2 turns on.