Monthly Archives: June 2018

Proper 18650 Battery Storage

Proper 18650 Battery Storage

Have you ever wondered if just putting your batteries in the fridge is the proper way to store them and extend their usability? We can answer that.
The recommend storage temperature for most batteries is indeed 15 degrees Celsius (hence your fridge). The lowest they should be stored is minus 40 to minus 50 Celsius. Lead acid should be kept at full charge during storage, but nickel and lithium based make-ups should be stored at around 40% state of charge (SoC) to minimize age-related capacity and yet allow the battery to self-discharge and stay in operating condition.

It is hard to that magic 40% SoC since the open circuit voltage (OCV) of batteries is difficult to estimate. The best way is to use voltage as a rough energy indicator. The SoC of lithium-ion is about 50% at 3.80V/cell and 40% at 3/75V/cell. The lithium-ion should be allowed to rest for about 90 minutes after charge or discharge before checking the voltage.

SoC on nickel-based batteries is the most difficult to determine. This is caused by a flat discharge curve, agitation after charge and discharge, and voltage change on temperature. There really is no practical estimation tool for nickel-based batteries. Since the storage charge level is not critical, just add some charge if the battery is empty (don’t if it is not), and then keep it in a cool dry storage place.

18650 Battery Storage
Storage always causes batteries to age. On the other hand, elevated temperatures speed up permanent battery capacity loss. Lithium-ion batteries in particular are often exposed to high temperatures; consider how many people leave their cell phones or laptop computers in hot places like the front seat of their car on a sunny day. Conversely, low temperatures and partial SoC slow the aging process, but cannot stop it.

Another factor that will shorten the life of your battery is overcharging it, or keeping it at the maximum charge voltage for extended periods. Batteries are like people: they must have the opportunity to relax after being charged, even if they are just allowed to stay on a float or trickle charge.

A sealed lead acid battery can be stored for up to two years. However, it is important that you monitor the voltage or gravity and charge up the battery if the battery falls to a 70% SoC or lower. Low charge causes an oxidation layer to form on the negative plate and inhibit the flow of current; this is called sulfation, which can prevent the charging of small sealed lead acid cells.

Here are some basic guidelines to follow when storing your batteries:
– Remove the batteries from the equipment and store them in a cool dry place.
– Lead acid must be charged before storing; monitor the voltage or gravity often and apply a boost if it falls below 2.10V/cell or an SG below 1/225.
– Avoid freezing, and remember that batteries in a discharged state freeze more easily than those that are not.
– Alkaline and primary lithium batteries can be stored for up to ten years with moderate loss of capacity.
 – Nickel-based batteries can be stored for five or more years, even at zero voltage; then prime them before use.
18650 batteries must be stored in a charged state; 40% is ideal. This will ensure that the battery will not drop below 2.50V/cell with self-discharge and go dormant. Discard them if the voltage goes below 2.00V/cell for more than seven days.

Following these simple guidelines should help you extend the life of your batteries and get more use out of them. If you are using a laptop rental, ask the rental provider what battery care is taken; you do not want to rent a laptop that will not perform at its peak when you most need it.

Remember to always handle your batteries safely. Wear safety gloves when handling lead, cadmium or electrolytes. If a battery were to ever rupture while you are handling it, and you are unable to avoid exposure, flush with water immediately and call your doctor.

How to Charge 18650 Batteries

 

How to Charge 18650 Batteries – 18650 Battery Chargers

A lithium ion battery is a competitively used type of cell that exhibits a different kind of charging potential variant from other cells. When powering the device, the electrons are discharged from the negative to the positive terminals unlike when it is being powered where the ions migrate in the reverse direction. This power build up enables it to conserve power for long periods. This is partly due to the diode-like action of the two terminals, which strike a balance in situations of extra power accumulation. This extra voltage, which is more than the energy potential of the device but whose polarity is supportable, is first discharged during use. This overload if read in a meter, would reveal that the device has registered negative polarity which when charging a phone it first loses before turning back to full capacity.

The rechargeable ion batteries usually utilize a combination of several good conductor salts that are merged with lithium bases to create a powerful electrolyte. The performance of these types depends on the metals that have been used together with the principal lithium to create a long lasting cell. However, these components are used in sparing measures to make it safe to use in different devices. The main component cannot be used wholly in its raw form for it leads to great chemical reactions, which may not be supportable by the small size of the device. Other built-in technological features have been incorporated to enhance the potential of these cells.

Rechargeable ion batteries are usually powered by a charger connected by a cable to an electric source that usually increases voltage in the interior of the cell. This creates a reaction inside which forces the passage of the electric power from the cathode to the other terminal. Though they may conserve more voltage than their capacity allows, their diode-like interior mechanics ensure that they cannot explode. This is further enhanced by the careful selection and balanced intermixture of bases in making the product.

Unlike other charging devices, the lithium ion battery does not lose much of its power capacity when inert. Thus, it can be left without being used for a long time and still retain its full charge. Another notable power feature of this cell is that it has convenient portability that is enhanced by the high-energy capacity. This marks it out as exceptional device in its class whose energy capacity is not determined by its size. Though it is relatively small and easy to carry around, it can easily power a device many times larger with guaranteed efficiency.

18650 Battery Charger
                                     18650 Battery Charger

The easy charging utility of this cell also allows it to be powered severally without depreciating its durability. This short-term charging not only increases its service but also retains memory. It does not lose much of its power when in use or when inert. For the best use of this device and improvement of its utility, it should be powered selectively. The charging character of the device means that one should not overload it but rather power it bit by bit in short sequences.
The many uses of this cell traverse from the typical consumer market to the armed forces. The army relies in the gadget for it is easy to carry around, charge and retain power for long periods of time when one is away from civilization. The most common electronic gadgets in which this charging device is used include cell phones of different types and DVD players.
A lithium ion battery costs between about $4 to more than $400. This depends on the make and the utility of the cell. It is also dependent on the technology that has gone into its making as well as the type of materials that have been used in this process. There are different brands that can be applied to corresponding cell phones and other electronic devices. In this respect, a consumer can obtain an original product such as the LG lithium Ion Battery that is one of the progenitors of this line of smart cells. The large selection in the stores ensures that the customer can find a type that is relevant and applicable to the gadgets they use at home.