portable power

Portable Power Solution for People On The Go

by | Aug 2, 2022

 

Outdoor enthusiasts, people who work outside, or others who spend a great deal of time out in the natural elements. Getting boots, shoes, gloves, or helmets wet might find it convenient to have a dryer. This is so that it can dry all of those things. The operation will be on portable power solution, such as a 12V battery. But which type of battery is the better choice?

A comparison between LiFePO 4 batteries and Lead-acid batteries

This part discusses the advantages of Lithium Iron Phosphate (LiFePO 4 ) or LFP batteries over the traditional Sealed Lead-acid (SLA) batteries. When it comes to comparing different battery types, it is important to mention that every type has its advantages and disadvantages. And this depends on the system design and application purpose. However, the high-capacity LiFePO 4 batteries are the safest lithium batteries available on the market today. There has been a great improvement in weight, capacity, and battery life. This makes the LiFePO 4 the perfect fit for a wide range of application possibilities.

LiFePO 4 vs SLA batteries

LiFePO 4 presents the perfect replacement for the 150-plus-year-old technology of the SLA batteries. Some of their major advantages include:

LIFESPAN & CYCLES: Far longer lifespan (expected 5-7 years). More than 10,000 cycles as opposed to only 200-500 cycle range in SLA. And an operating temperature range from -4 F to 140 F.

ENERGY DENSITY: Three times the energy density. So more portable power solution is available for longer, better energy efficiency (92%-95%), as opposed to 80%-85% in SLA, and excellent weight-to-energy ratio.

WEIGHT: Very convenient where there is a concern about size and weight. They are 55% lighter and only 1/3 the physical volume of SLA. So there will be a need for less installation space.

CHARGING: Charges 4x-6x faster at any time (no memory effect) with minimal losses. This is due to the super low internal resistance, and more than 80% in 20 minutes.

DISCHARGING: The discharge of Electricity can be in 15 minutes, and up to 85% every day. Sometimes safely up to 100% of the Depth of Discharge (DoD), as opposed to SLA with a DoD of 50%. Also, an important advantage is the constant stability of power delivery in the entire discharge cycle. With very low self-discharge values (less than 2%-3% per month), the batteries can store energy for a long period. Compare this with the discharge rate for SLA, which is five times

greater, necessitating a trickle charger.

SAFETY: Being safe in terms of thermal and chemical stability, they remove the risk of explosion under extreme conditions. This will not overheat or catch fire. Although a rare occurrence, SLA will release some fumes. There is a high chance of leakage, which is not the case for LiFePO 4. Intelligent monitoring will be there with an advanced battery management system (BMS). This system also monitors the safety parameters of the cells such as voltage and temperature values, preventing short circuits. It also cuts off the power supply in case of exceeding values, and this will result in maximum protection.

ENVIRONMENTAL FRIENDLINESS: They are free from nickel, cobalt, cadmium, lead, or mercury, and present no risk to the environment if properly disposed of. On the other hand, the phosphate in LiFePO 4 batteries is not hazardous.

PRICE: In 2020 the prices for these cells fell to $80/kWh and continue to fall. While they are three to ten times more expensive to purchase, given that SLA needs to change every one to three years, the investment can still be financially sound.

DISADVANTAGES:

LiFePO 4 is still not widely available. The charging of LiFePO 4 batteries will be below the 32 F limit and this will remain unless heating is there. The shipping is hazardous goods, as opposed to SLA, where there is no restriction to transport. Regarding the purchase costs, it may not be

economical in the long run for users who would not use the storage every day. Also, charging will not be possible with SLA chargers, as this can lower the cell life and cause damage due to a lack of overcharge protection.

The Better Battery

In summary, LiFePO 4 is the better solution for a variety of applications by offering a lot of benefits and advanced technology. It is safer, lighter, reliable, more environmentally friendly, and cleaner, with a huge lifespan, and more profitable in the long term. It presents the ideal solution for everyday use, for the next-generation EVs, as backup power for residential units, or as a portable power solution.

DC-AC power conversion: Efficiency issues

Household renewable energy systems such as solar PVs (photovoltaics) produce DC (direct current) power as output and convert this energy to AC (alternating current) power with the use of inverter technology. The main reason for this is AC home wiring, which leads to home appliances that run on AC instead of DC.

The power from the utility grid to which households and businesses have connections is pure AC power. Because AC tolerates high voltage levels resulting in minimal losses, the transmissions and distributions will be for long distances, which makes it a more practical solution. Therefore, most household appliances run on AC. For some usage purposes, this might not always be the case.

Most entertainment devices use DC power. This means that DC power produced from household solar PV systems is convertible into AC and then converted back to the appropriate DC voltage level with the component’s built-in transformer. But every conversion means losses. Every mobile device, such as camping electronics powered by built-in batteries, is using DC. As a result, using DC power directly without converting it to AC, can have some application and efficiency improvements.

Advantages of using energy from battery storage without DC-AC conversion

If the system has designs of directly using the power from solar PVs in order to charge batteries, then this battery pack storage of accumulated energy will use without the need for conversion into AC. In this case, there will be a need for only a battery charge regulator, preventing battery overcharging, which can lead to battery damage.

The inverter converts the DC power using electronic components into an oscillating sine wave current with a 50 Hz or 60 Hz frequency. Although the DC-AC inverters have been greatly improved in the past few years, the main disadvantage is still the losses. This varies from 3% to 10%, meaning that the efficiency is 90% to 97%.

This value represents the peak efficiency, so this value is dependent on the load. If the electrical load of the system is low, the inverter efficiency will decrease respectively. Maximum efficiency is achieved when the load is more than 70% of the inverter’s capacity. In a best-case scenario and with perfectly matched parameters, 3% inverter loss in the form of heat is inevitable.

Another obstacle is the high cost of inverters. In addition, most manufacturers offer around 10 years of warranty. After this period, an efficiency loss is expected.

Other disadvantages include the price of the suitable battery pack and the quantity needed.

Conclusion

It is feasible and efficient to use solar PV or other DC-generating portable power solution for direct battery charging. This is without converting the energy into AC. Significant amounts of energy and investment cost can be saved if DC-AC power conversion is not made. The efficiency of the aforementioned applications is increased, and the associated costs are reduced. This is why using devices like MobilDri by VersaDri, which is built on a 12V system so no DC to AC conversion is required. It saves on energy when using off-grid or with renewable energy so efficiency loss is not a factor. MobilDri is the most effective Portable Glove Dryer or boot dryer on the market.

For More Information also read the benefits of portable dryer