Talking about Battery pack core components-battery cell (1)

Talking about Battery pack core components-battery cell (1)

Most of the batteries used in the mainstream PACKs on the market are lithium iron phosphate batteries.

“Lithium iron phosphate battery”, the full name of lithium iron phosphate lithium ion battery, the name is too long, referred to as lithium iron phosphate battery. Because its performance is particularly suitable for power applications, the word “power” is added to the name, that is, lithium iron phosphate power battery. It is also called “lithium iron (LiFe) power battery”.

working principle

Lithium iron phosphate battery refers to a lithium ion battery using lithium iron phosphate as a positive electrode material. The cathode materials of lithium-ion batteries mainly include lithium cobalt oxide, lithium manganate, lithium nickel oxide, ternary materials, lithium iron phosphate, etc. Among them, lithium cobalt oxide is the cathode material used in the vast majority of lithium-ion batteries.

significance

In the metal trading market, cobalt (Co) is the most expensive, and there is not much storage, nickel (Ni) and manganese (Mn) are cheaper, and iron (Fe) has more storage. The prices of cathode materials are also in line with those of these metals. Therefore, lithium-ion batteries made of LiFePO4 cathode materials should be quite cheap. Another feature of it is that it is environmentally friendly and non-polluting.

As a rechargeable battery, the requirements are: high capacity, high output voltage, good charge-discharge cycle performance, stable output voltage, high-current charge-discharge, electrochemical stability, and safety in use (not due to overcharge, overdischarge and short circuit). It can cause combustion or explosion due to improper operation), wide operating temperature range, non-toxic or less toxic, and no pollution to the environment. LiFePO4 batteries using LiFePO4 as the positive electrode have good performance requirements, especially in terms of large discharge rate discharge (5 ~ 10C discharge), stable discharge voltage, safety (non-burning, non-exploding), life (cycle times) ), no pollution to the environment, it is the best, and is currently the best high-current output power battery.