Lithium iron Phosphate Battery: Green Battery

Lithium iron phosphate lithium iron phosphate as the cathode material for lithium-ion batteries . The battery does not contain any heavy metals and rare metals (nickel-metal hydride batteries to be rare metals), non-toxic (SGS certified), non-polluting and comply with the European RoHS requirements for the absolute green battery card. Lead acid battery, but there is a lot of lead waste if not handled properly, will continue into secondary pollution on the environment enough lithium iron phosphate material in terms of production and use, are pollution-free, so the battery column into "15", "863" national high-tech development plan, a key state support and encourage the development of the project. With China's accession to the WTO, China's export of electric bicycles will increase rapidly, and entered the European electric bike battery with the requirements of non-polluting.

Lithium iron phosphate also has its drawbacks: for example, the tap density, lithium iron phosphate cathode material, and other capacity lithium iron phosphate volume is greater than the lithium cobalt oxide and lithium-ion batteries, and therefore does not have the advantage in the area of ​​micro-battery.

The VRLA batteries bottleneck fade
The lithium-ion battery performance depends primarily on the anode and cathode materials, lithium iron phosphate lithium battery material is only in recent years appear to do, the domestic develop a large-capacity lithium iron phosphate is July 2005. Safety performance and cycle life can not be compared to other materials, these are also precisely the power battery is the most important technical indicators. 1C charge-discharge cycle life up to 2000 times. Single battery charging voltage 30V does not burn, not explode puncture. Lithium iron phosphate cathode material to make high-capacity lithium-ion battery is more likely to be used in tandem. VRLA battery with its small, stable voltage, pollution-free, light weight, high discharge performance, and a small amount of maintenance, and to become the preferred communication power system battery. However, in actual use, up to less than the theoretical life expectancy abound. Battery theoretically work from 7 to 10 years, mostly in the 2 to 3 years, damaged, and some even years of life can not be achieved, resulting in great economic losses.

Lagging behind due to the development of China's power, national power shortage is more serious in many parts of the lack of electricity, the power shortage situation, power cuts have also occurred, mobile base stations throughout the urban and rural areas, lack of mains supply Objectively speaking, the use of the base station VRLA battery maintenance is an extreme test, if maintenance treatment in a timely manner will directly affect the performance and service life of VRLA battery manufacturer.

Hoi Pa four advantages of lithium iron phosphate
Hoi Pa Hoi Pa Group's production of lithium iron phosphate lithium iron phosphate as the cathode material for lithium-ion batteries, compared with the lead-acid battery, lithium iron phosphate has a light weight, high and low temperature resistance, long life, safety, environmental protection, no pollution.

Ambient temperature
Ambient temperature is too high a great influence on the service life of VRLA battery plate corrosion at elevated temperatures, the battery will exacerbate, will consume more water, so that the battery life is shortened. Longer life battery is available in a 25 ° C environment temperature rises 10 ° C, long-running, service life is reduced by approximately half. In addition, the ambient temperature of 25 ° C to 0 ℃ when every 1 degree lower discharge capacity of about 1% loss, so the battery should be at 15 ℃ ~ 20 ℃ environment.

The Haiba use of lithium iron phosphate ambient temperature -20 ℃ to 70 ° C colder winter season, the base station indoor temperature can be as low as -15 ° C up to 50 ° C, the hot season base station indoor, in this temperature range, the sea Pa lithium iron phosphate batteries have a very good performance. The ambient temperature of lithium iron phosphate, Hoi Pa is much smaller than lead-acid batteries.

Overcharge and over discharge
Lead-acid battery over-charging state, the positive electrode due to the oxygen evolution reaction, water is consumed, H + increased, resulting positive increasing acidity near the thinner grid to accelerate the corrosion of the battery, so that the battery capacity; exacerbated due to water loss at the same time, the the battery risk of dry, thereby affecting battery life.

Lead-acid battery over discharge occurred mainly after the AC power source fails, the battery to power the load for a long time. Lead sulfate is an insulator, its formation is bound to have a significant negative impact on the battery charge and discharge performance, the formation of sulfate on the cathode is more, the greater the internal resistance of the battery, the battery charge, the discharge the worse the performance, the shorter the life of the battery.

Hoi Pa lithium iron phosphate group is equipped with battery management systems, battery management system can monitor each single cell within the battery pack voltage and total voltage of the battery pack, the charging and discharging process, the total voltage reaches the set value or cell voltage reaches the set value, the management system can terminate the charge and discharge, the battery pack will not overcharge and over discharge.

Long-term floating charge

Float current DC switching power supply system provided three roles: VRLA battery for daily load current to supplement battery self-discharge losses, to maintain oxygen cycle batteries. If the battery is in the state of long-term floating charge, the only charge without discharge, will inevitably lead to the the battery anode plate passivation, the battery internal resistance increases, the capacity dropped significantly, resulting in battery life decreased. In addition, the choice of the lead-acid battery float voltage should be adjusted with the state of the battery float voltage may result in inappropriate overcharge, affecting the life of the battery, or the battery charge is insufficient long-term state.

Hipower lithium iron phosphate, low self-discharge rate, to shelved 30 day capacity retention rate at 98%, so the battery pack in a floating state for a long time, the the float current switching power supply almost all for the day-to-day load current with The self-discharge current of loss supplement battery pack is very small. In addition, the choice of lithium iron phosphate battery float voltage insensitive itself resistant to float, more suitable for the base station back-up power.

The use of cost
Communication base station battery pack costs and the need to consider the cost of the battery, the battery life, the process of using maintenance costs.

Lower prices of lead-acid batteries, battery of 7 to 10 years but because of the relatively short life, the theoretically work, most of the damage in 2 to 3 years, and some of them even reach 1 year of life, In addition, in the course of in manual testing and maintenance, and the use of very high cost.

Hoi Pa lithium iron phosphate has a maintenance-free, ultra-long service life, etc. performance, fully intelligent battery management system to replace manual testing links, battery management system automatically detects and protective properties, so that the failure rate of the battery pack to be reduced to the limit long design life, and greatly reduce the cost of the use of the communications industry.