Lithium batteries or long-lasting power sources

Lithium power sources are required for many electronic devices. This article will discuss the commonly used lithium-ion batteries.

Composition of a lithium battery

A lithium battery operates through an irreversible oxidation reaction. Metallic lithium serves as the anode, while manganese oxide, iron disulfide, or copper oxide can be used as the solid cathode. Liquid oxides include sulfur oxide and thionyl chloride. Active lithium, which effectively removes electrons, is the oxidizing agent used.

Types of lithium batteries

One of the classification criteria for storage devices is the type of main active substance:

• Lithium-nickel-cobalt-aluminum-oxide (NCA) batteries
• Lithium-manganese batteries
• Lithium-cobalt batteries.
• Lithium iron phosphate batteries
• Lithium titanate sources
• Lithium-polymer batteries
• Lithium-thionyl chloride battery

One of the important indicators when choosing a battery is the operating voltage.

Let's look at just a few of them.

3V lithium batteries are only used in specially designed gadgets; they cannot be used in remote controls or regular home watches.

A 6V lithium battery can be used in uninterruptible power supplies, battery-powered toy cars, and many other applications.

The 12 volt lithium battery is used in addition to installation in UPSin standalone tools, such as screwdriver.

Marking

What markings should lithium-ion batteries have? According to IEC requirements, the following indicators must be marked on the battery case:

1. Capacity lithium battery
2. Lithium battery sizes
3. Compound
4. Class
5. Voltage

Lithium batteries are designated by the letters "CR." The next number indicates the battery size. The table below shows their calibration.

Name	Marking	Voltage, V
Large round, D	20	1.5
Small round, C	14	1.5
Finger, AA	6	1.5
Micro-finger, AAA	03	1.5
«Crown», RR3	6/22	9.0

Charging energy storage devices

Many people wonder whether Li-ion batteries can be recharged. Clearly, only specially designed batteries, known as rechargeable batteries, can be recharged.

Typical types of battery sources andWhich batteries are better?

Battery types include ion (Li-ion) and polymer (Li-polymer) batteries. A comparative table of lithium battery characteristics will help you analyze these in more detail.

Characteristics	Lithium-ion batteries	Lithium polymer batteries
Design Features	Productivity depends on the placement of elements within the block	The presence of liquid electrolyte is excluded
Lithium battery sizes	A small set of options	Wide choice regardless of cell format
Energy intensity	High	Low, number of recharges is lower
Weight	Slightly higher	Short
Capacity	Not big	Twice as much with the same volume
Service life	Does not have significant deviations	Does not have significant deviations
Charging time	Long-term	Noticeably less
Wear	Comparably higher	Below
Safety (fire risk)	Low (risk of explosion)	Above (has built-in protection)
Price	Below	Higher

Today, the development of new lithium-metal cells (li-metal) with increased safety and an extended service life is in full swing.

Lithium-metal batteries are quite promising for replacing li-ion and li-pol sources.

Features of charging a lithium polymer battery

To maintain a constantly full capacity of the power source, it is necessary to charge it according to the schedule, namely, after discharging after 500 hours of equipment operation.

A polymer battery is sensitive to mechanical damage, hypothermia, as well as voltage fluctuations and overloads, so it should only be connected to a stable power supply.

How to recover a lithium-ion battery

The lifespan of a lithium battery is quite long, but sooner or later it loses its original capacity. capacityThat's why many people are concerned about battery restoration.

Let's look at two ways to restore a drive.

The first method seems dubious, but it's the simplest and, according to experts, often works. You need:

1. Place the power supply in the freezer for 30-40 minutes
2. After removing it, immediately charge it for a few minutes.
3. then leave to equalize to room temperature
4. and only then continue charging.

The controller frequently stops blocking the operation of the element.

The second method is worth trying if standard charging and freezing procedures don't help. This method involves disconnecting the protective board using the following steps:

1. Use a tester to measure the battery voltage (if the reading is zero, you can continue)
2. carefully disconnect the protection board
3. re-measure the voltage (it should increase to a maximum of 2.5V)
4. connect to a charger (with adjustable current) and set the current to 100 mA and voltage to 4.2 V for 10-15 minutes
5. Be sure to monitor the voltage (it should not rise above 3.2V). If the element heats up, stop charging immediately.
6. After reaching the required current and voltage values, return the board to its original place and charge in the normal mode.

How long does it take to charge lithium batteries?

Chargers with charge level indicators are widely used these days, but if you don't have one, you can calculate the required time using the following formula:

T (time) = 1.4*Y(mAh)/X (mA), where 1.4 is the heat transfer coefficient.

How to check the power supply?

The easiest and fastest way to check the charge of a power source is with a multimeter.

There are two ways to check:

1. No-load testing. Readings of 1.35V or higher indicate the element is fully functional.
2. Load testing allows for more accurate rejection of low-voltage drives. This requires performing the measurement while the battery is functioning.

How to replace the battery?

Replacing weak disposable batteries is a significant financial burden. Therefore, many are considering purchasing rechargeable batteries. Lithium batteries are undoubtedly the most suitable for this purpose.

Searches on internet search engines are particularly popular for converting older screwdriver models to lithium batteries. To do this, you only need to find the right ones. screwdriverlithium analogs of the same size and voltage.

How much does a lithium battery cost?

Lithium button batteries are among the cheapest batteries. Commonly known as lithium coin batteries, they are used to power watches, scales, processors, and other low-drain gadgets. Prices for these batteries start at 10 rubles and are limited only by the appetites of manufacturers and distributors.

It's difficult to determine the upper limit due to the vast variety. However, it's clear that, as with all technological innovations, costs are falling due to increased production efficiency and the growing number of manufacturers.

Battery production

High-capacity lithium batteries are used in the production of electric vehicles. Due to the increased popularity of electric vehicles, the opening of numerous factories producing these batteries is expected. According to various consulting firms, approximately 26 such large factories will soon be operational. Some of these are already operational, while the rest are planned to launch by 2021.

Additional information about lithium batteries

These batteries are the most efficient and can withstand heavy loads. Users highlight a number of advantages: increased energy capacity, stable voltage, and high capacity. Like other batteries, lithium batteries consist of an anode, cathode, separator, and diaphragm. The last two elements serve as the dielectric. This power source uses a special impregnation for the diaphragm.

The main difference between lithium-ion batteries and alkaline batteries is their long service life. This is achieved through the use of a special technology that eliminates the load current dependence of lithium-ion batteries. They do not have this. Therefore, they can be stored for up to 12 years. Despite the complexity of the manufacturing process, manufacturers have learned to produce different types of lithium batteries. These batteries easily withstand temperature fluctuations and can operate for a long time under continuous loads.

Electrolyte used in lithium batteries

1. thionyl chloride.
2. manganese dioxide;
3. polyfluorocarbon compounds;
4. sulfur dioxide;
5. iodine;
6. copper oxide;
7. iron disulfide;

The nominal voltage of such a battery is 3.7 volts. Lithium produces cells that are lightweight and very thin. Essentially, it is a soft and ductile metal.

These power sources began to be manufactured in the early 1970s. Initial experiments with these batteries were unsuccessful, and they often ended in explosions. However, after some time, all the defects were eliminated. Despite this, lithium batteries must be used in accordance with the operating instructions.

To create a safe power source from lithium, it was necessary to combine it with solid organic electrolytes. The result was a more powerful and compact battery cell. Two 3-volt lithium batteries can easily replace 4-5-volt alkaline batteries.

Protection

To ensure stable and reliable operation of lithium batteries, a special protective circuit was incorporated into their design. This is what it protects against:

1. Strong heating.
2. Recharge.
3. Short circuits.
4. Overdischarge.

It's soldered to the terminals. It has a built-in controller that monitors the battery's charge. If the battery overcharges above 4.25 V, it will disconnect it from the charger.

How to charge lithium batteries?

Essentially, batteries can't be recharged, especially if they're labeled "do not recharge." If your cell is a rechargeable battery, recharging follows this pattern.

Charging occurs in 2 stages.

1. Direct current with parameters of 0.2-0.5 C. The letter "C" denotes capacity. Since the battery has a built-in protective circuit board, the open-circuit voltage should not exceed 7 volts. When the voltage level rises to 4.2 V, this means the battery is 80% charged.
2. Recharging is performed at a constant voltage. The current level should decrease. The charger should maintain a voltage of 4.1-4.2 V. It also regulates the current, which gradually decreases. When it drops to 0.05-0.01 C, the charging process is complete. At this stage, the battery fully recharges to 100%.

It is advisable to use a charger with voltage ratings.

Lithium batteries do not tolerate overcharging well, so they must be disconnected in time.

Where are lithium batteries used?

The applications for such power sources are diverse. For example, they can be installed in alarm clocks, remote controls, and electronic scales. But they are particularly useful in devices with high power consumption, such as cameras, flashes, toys, medical equipment, military equipment, and computer equipment.

Pros and cons of lithium batteries

Their main advantage is that they can have a large capacity in a small size.

List of advantages

1. Easy to maintain.
2. Stable parameters are ensured with different discharge current data.
3. Resistant to temperature changes due to the lack of water.
4. Constant voltage.
5. Light weight.
6. High energy capacity and energy density.
7. The capacity does not depend on the load current, suitable for high-power devices.
8. Long shelf life.

The main drawback of this type of power storage device is its cost. However, it won't require replacement for a long time.

Types and sizes of lithium batteries

The following options can be found on sale:

• FR
• Li-FeS2.
• CR

They differ from each other in shape and can be cylindrical, square or disc-shaped.

Classification of the United States of America

• FR6 (AA).CR. Flat tablet cells.
• FR03 (AAA).
• CR-V9 (Lithium PP3). Nine-volt battery crown.
• CR2 and CR123. Made in the form of round barrels.

Some parameters can be found on the device body. For example, these may include voltage, capacity, class, and year of manufacture.

The difference between lithium batteries and saline and alkaline batteries

• Alkaline batteries last up to 3-5 years. Among these three types, they are the hardest hitters. They are also known as alkaline batteries. They have proven themselves excellent in remote controls, toys, flashlights, radios, and other low-power devices.
• Lithium batteries last longer than saline and alkaline batteries. They are ideal for photographic equipment and medical devices.
• Salt-based batteries are the cheapest, but also the weakest. They can be stored for about three years. They are ideal for remote controls, flashlights, toys, calculators, timers, and scales.

Basically, the batteries listed above differ from each other in terms of service life and capacity.

Safety rules

• Do not solder the wire to the contacts.
• Lithium batteries are transported in a special container/case.
• There is no need to keep it in the sun.
• Do not place the battery in a pocket with metal objects.

Lithium battery device

There are two design options:

1. Spiral.
2. Bobbin.

Spiral cells have a large lithium surface area. They deliver up to 4 A with pulsed current and up to 0.1-1.8 A with continuous current. These batteries lose 10% of their initial capacity per year. Prismatic, button, or similar types of batteries are available in stores.

Major manufacturers:

1. Varta,
2. Minamoto,
3. Tekcell
4. Robiton,
5. SAFT,
6. EVE,

Bobbin power supplies can last up to 20 years and are used in devices with a current draw of no more than 150 mA.