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Introduction to lithium iron phosphate battery

The full name of the lithium iron phosphate battery should be lithium iron phosphate lithium ion battery, abbreviated as lithium iron phosphate battery. It is a lithium ion battery using lithium iron phosphate (LiFePO4) as the battery positive electrode. It is a product launched after 2002. It is lithium A new member of the ion battery family. Because its performance is particularly suitable for power applications, the word "power" is added to the name, that is, lithium iron phosphate power battery. Some people call it "Lithium Iron (LiFe) Power Battery". The current cathode materials for lithium-ion batteries on the market are mainly lithium cobalt oxide (LiCoO2). In addition, there are a few lithium-ion batteries that use lithium manganese oxide (LiMn2O4) and lithium nickel oxide (LiNiO2) as cathode materials. Generally, the latter two cathodes The material of lithium-ion battery is called "lithium manganese battery" and "lithium nickel battery". Among the metal elements that make up the battery cathode material, cobalt (Co) is the most expensive and has a small storage capacity. Nickel (Ni) and manganese (Mn) are cheaper, while iron (Fe) is the cheapest. The price of the cathode material is also consistent with the price of these metals. Therefore, lithium-ion batteries made of LiFePO4 cathode materials should be the cheapest. Another feature of it is that it does not pollute the environment. Lithium iron phosphate battery is a rechargeable battery. It has high capacity, high output voltage, good charge and discharge cycle performance, stable output voltage, high current charge and discharge, electrochemical stability, and safety in use (no overcharge , Over-discharge, short-circuit and other improper operations that cause combustion or explosion), wide operating temperature range, non-toxic or less toxic, and no pollution to the environment, these performance requirements are all good, especially in high discharge rate discharge (5-10C discharge), It is the best in terms of stable discharge voltage, safety (no combustion, no explosion), life (number of cycles), and no pollution to the environment. It is currently the best high-current output power battery.

1: The peak value of lithium iron phosphate electric heating can reach 350℃-500℃, while lithium manganate and lithium cobalt oxide are only around 200℃, which has high temperature resistance. The peak value of lithium iron phosphate electric heating can reach 350℃-500℃ while lithium manganate and cobalt Lithium acid is only around 200℃, and it is used more in the street lamp industry.

2: Small size and light weight used in street lights, the volume ratio of lithium-ion batteries is as high as 100wh/l, which is smaller than lead-acid batteries. More free from space constraints in installation. The weight of a lithium iron phosphate battery with the same capacity is only half the weight of a lead-acid battery.

3: It is the best match to the charging and discharging state of the street lamp. The charging and discharging current of the street lamp is very small, most of which will not exceed 10A. Therefore, for the battery, it is shallow charging and shallow discharge. This working mode limits the matching battery.

4: No memory effect, the capacity will be lower than the rated capacity value quickly, this phenomenon is called memory effect. Like nickel-metal hydride and nickel-cadmium batteries, there is memory, but lithium iron phosphate batteries do not have this phenomenon. No matter what state the battery is in, it can be charged and used at any time without having to discharge it first.

Square aluminum shell lithium iron battery specification table