How to charge lithium ion battery: What to consider

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Real Estate Agent

Have you a Lithium battery? A 12V Lithium battery? Or 48V Lithium battery maybe? When filling and emptying the battery a chemical reaction occurs, but with lithium ions there are exceptions. Scientists talk about the energy flowing in and out of the battery as part of the movement of ions between the anode and cathode. If the scientists are right, according to this statement the battery will live forever but not like that. They blame the fading of trapped ions, but as with all battery systems, internal corrosion and other degenerative effects, also known as parasite reactions to electrolytes and electrodes, play an important role.

Lithium ion chargers are voltage limiting devices that have similarities with lead-acid battery systems. The difference with Li-ion is found at higher cell voltages, tighter voltage tolerances and no droplet loads or full load float. While lead acid offers some flexibility in terms of cut-off voltage, Li-ion manufacturers are very decisive in the correct settings because Li-ion cannot receive excess. The so-called "magic charger" promises to extend battery life and increase extra capacity. The Li-ion system is a "clean" system and only takes what it can absorb. In market, there are many options to choose; 36V Lithium battery, 48V Lithium battery and so on.

Loading cobalt batteries mixed with Li-ion

In particular we refer to Li-ion batteries which are produced with traditional materials of cobalt, nickel, manganese and aluminum cathodes which are usually filled at 4.20V / cell. The tolerance is +/- 50mV / cell. Some varieties based on nickel are charged 4.10V / per cell; High-capacity Li-ion can reach 4.30V / per cell. Increasing the voltage also increases capacity, but exceeding specifications can burden the battery. The protection circuit incorporated in the package does not allow to exceed the specified voltage.

Charge the Li-ion battery without cobalt

While traditional lithium-ion has a nominal cell voltage of 3.60V, Li-phosphate (LiFePO) has a nominal voltage of 3.20V and costs to 3.65V. Relatively new is Li-titanate (LTO) with a nominal cell voltage of 2.40V and loading at 2.85V. This charger for non-cobalt based Li ions is not compatible with ordinary 3.60 volt Li ions. The most suitable loaders must be properly identified to provide the correct load. A 3.60 volt lithium battery in a charger designed for Li-phosphate will not receive enough charge; Li-phosphate in ordinary chargers can cause overcharging.

Lithium ion overload

The lithium ion operates in a safe manner in the specified operating voltage; however, the battery becomes unstable if it is filled with a voltage higher than specified. With a prolonged charge above 4.30V in Li-ion designed for 4.20V lithium metal plates / cells at the anode, the cathode material becomes an oxidizing agent, loses stability and produces carbon dioxide (CO2). Cell pressure increases and if the load is allowed to continue, the current disrupting device (CID) responsible for cell safety is decided at 1,000-1,380 kPa (145-200 psi). If the pressure rises further, the safety membrane in some lithium ion explosions will open at around 3,450 kPa (500 psi) and the cell can cause combustion because it has reached high temperatures.

Summary

Filling lithium-ion batteries is simpler than nickel-based systems. Direct charging circuit; Voltage and current limits are easier to accommodate than other complex voltage forms, which change with the age of the battery. The charging process can be intermittent, and Li-ion does not need saturation as is the case with lead acid. This offers great advantages for renewable energy storage, such as solar panels and wind turbines, which cannot always fully charge the battery. The absence of drip fees simplifies the charger even more. View more if you want more information.

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Rainer
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Sham Reddy CRS
H E R Realty, Dayton, OH - Dayton, OH
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Great information. Thanks for sharing!

Filling lithium-ion batteries is simpler than nickel-based systems. Direct charging circuit; Voltage and current limits are easier to accommodate than other complex voltage forms, which change with the age of the battery. The charging process can be intermittent, and Li-ion does not need saturation as is the case with lead acid. This offers great advantages for renewable energy storage, such as solar panels and wind turbines, which cannot always fully charge the battery.

Jul 18, 2019 03:56 AM #1
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