In one minute, we will know what all in one solar street light lithium iron phosphate battery is
A lithium iron phosphate battery for all in one solar street light is a lithium ion battery using lithium iron phosphate as the cathode material. All in one solar street light is a kind of high-efficiency solid-state light source formed by semiconductor PN junction that can emit light with weak electric energy. Under a certain forward bias voltage and injection current, it injects holes in the P area and injects N After the electrons in the zone diffuse into the active zone, they are recombined by radiation to emit photons, which directly convert electrical energy into light energy. All in one solar street light manufacturer is a solid-state cold light source, which has the characteristics of environmental protection, pollution-free, low power consumption, high light efficiency and long life. Therefore, all in one solar street light will become the best energy-saving transformation of road lighting. choose. Lithium-ion battery cathode materials are lithium cobalt, lithium manganate, lithium nickel, ternary materials, lithium iron phosphate, etc. All in one solar street light manufacturer is a solid-state cold light source, which has the characteristics of environmental protection, pollution-free, low power consumption, high light efficiency and long life. Therefore, all in one solar street light will become the best energy-saving transformation of road lighting. choose. Among them, lithium iron phosphate is currently the anode material used in most lithium-ion batteries. In terms of material principles, lithium iron phosphate is also an intercalation/deintercalation process, which is exactly the same as lithium cobalt and lithium manganate.
Lithium iron phosphate batteries belong to lithium ion secondary batteries. One main purpose is to use it as a power battery. It has great advantages over NI-MH and Ni-Cd batteries, and has high charge and discharge efficiency. The charging and discharging efficiency can reach 90 under discharge conditions. More than %, while lead-acid batteries account for about 80%.
Eight advantages
1. Improve safety performance
The p-o bond in the lithium iron phosphate crystal is stable and difficult to decompose. Even in the case of high temperature or overheating, it will not collapse and generate heat like cobalt lithium, or form strong oxidizing substances, so it has good safety. A report pointed out that in actual operation, a small amount of samples were found to burn in acupuncture or short circuit experiments, but no explosion occurred. In the overcharge experiment, Gaodianya had a discharge voltage several times higher than its own and was used for charging. There is still an explosion. Nevertheless, its overcharge safety has been greatly improved compared with ordinary liquid electrolytic lithium cobalt acid batteries.
2, improvement of life span
The cycle life of lead-acid batteries is about 300 times, the highest is 500 times, the cycle life of lithium iron phosphate power batteries is more than 2000 times, and the standard charge (5h rate) can reach 2000 times. Lead-acid batteries of the same quality "new half a year, old half a year, and maintenance half a year", the maximum time is 1 x 1.5 years, and the theoretical life of lithium iron phosphate batteries can reach 7 to 8 years under the same conditions. Taking into account the service life of lead-acid batteries, the service life of lead-acid batteries is more than 4 times that of lead-acid batteries. High current discharge can quickly charge and discharge high current 2C. With a dedicated charger, the battery can be fully charged within 40 minutes of 1.5C charging, and the starting current can reach 2C, but lead-acid batteries have no such performance.
3, good high temperature performance
The peak temperature of lithium iron phosphate can reach 350°C -500°C, while lithium manganate and lithium cobaltate are only around 200°C. Wide operating temperature range (-20C-+75C), high temperature resistance, lithium iron phosphate heating peak is as high as 350°C-500°C, and lithium manganate and lithium cobaltate are only around 200°C.
4, large capacity
Its capacity is larger than ordinary batteries (lead-acid, etc.). 5AH-1000AH (single)
5. No memory effect
Rechargeable batteries work under often full and undischarged conditions. The capacity will soon fall below the rated capacity. This phenomenon is called the memory effect. For example, nickel-metal hydride and nickel-cadmium batteries have memory characteristics, while lithium iron phosphate batteries do not. Regardless of the state of the battery, they can be used together with charging, and do not need to be discharged before charging.
