Guidelines for the Safe Use of Polymer Lithium Batteries

Guidelines for the Safe Use of Polymer Lithium Batteries

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In order to make you use the polymer lithium battery more safely, please read the following text carefully.

Combustion: Charging with a non-lithium battery charger may cause damage, smoke, heat or burning of the lithium battery!​
Damage: Over-discharge, over-charge or reverse charging will immediately cause damage to the lithium battery!
Charging: the charging current should not be greater than 1/2 of the battery capacity; the charging cut-off voltage is 4.20V±0.05V for a single battery; the charger can fully charge the corresponding lithium battery pack, and there is an indicator light to indicate the charging process (for details, please refer to the charger manual).
Discharge: For the first use, please use the recommended charger to charge;
When using it continuously, please pay attention to check the battery voltage. The total voltage of the 3-series battery pack shall not be lower than 8.25V; the total voltage of the 2-series battery pack shall not be lower than 5.5V; the voltage of a single battery shall not be lower than 2.75V. Voltages below these ratings will cause the battery to gass up and be damaged!
Storage: The self-discharge rate of lithium batteries is higher than that of nickel-metal hydride batteries. Long-term storage is prone to over-discharge. Please check the voltage regularly to keep the single voltage between 3.6V and 3.9V;
Storage conditions: temperature -20℃～+35℃; relative humidity 45%～85%.
The polymer lithium battery is packed with aluminum-plastic film, and it is forbidden to scratch, collide or pierce the surface of the battery with sharp objects. The battery tabs are not very strong and can be easily broken when bent, especially the positive tabs.
Each cell has flux tabs cold soldered on the positive lug to help you solder. When soldering, a constant temperature soldering iron of <100W should be used to tin the tabs, the temperature should be controlled below 350℃, the soldering iron tip should not stay on the tabs for more than 3 seconds, and the number of soldering should not exceed 3 consecutive times. The welding position is more than 1cm away from the root of the tab. The second welding must be done after the tabs have cooled.
The polymer lithium battery pack has been well welded, and it is forbidden to disassemble or re-solder. In theory, there is no flowing electrolyte in the lithium polymer battery, but if the electrolyte leaks and comes into contact with the skin, eyes or other parts of the body, immediately rinse with clean water and seek medical attention.
Do not use damaged battery cells (damaged sealing edge, damaged casing, smell of electrolyte, leakage of electrolyte, etc.). If the battery heats up rapidly, please keep away from the battery to avoid unnecessary damage.

8-Packaging-Processes-For-Lithium-Polymer-Batteries

8 Packaging Processes For Lithium Polymer Batteries

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Lithium battery soft packs have good safety performance, so they are widely used in electronic digital products, medical equipment, medical equipment, and handheld electronic equipment. I believe that many people do not understand the packaging process of lithium battery soft packs. Technology will share with you the packaging process of lithium battery soft pack through this article.
1. Soft pack battery.
The soft-wrapped cells that everyone has encountered are all cells that use aluminum-plastic film as the packaging material. Different packaging materials determine the use of different packaging methods. Welding is used for packaging batteries.
2. The outer layer of outer packaging, aluminum plastic film.
The aluminum-plastic composite film can be roughly divided into three layers – the inner layer is the bonding layer, and polyethylene or polypropylene materials are mostly used to play the role of sealing and bonding; the middle layer is aluminum foil, which can avoid the infiltration of water vapor from the outside of the battery. At the same time, the leakage of the internal electrolyte is avoided; the outer layer is a protective layer, and high-melting polyester or nylon materials are mostly used, which have strong mechanical properties, avoid damage to the battery by external forces, and protect the battery.
3. Aluminum-plastic film stamping forming process.
The soft-packed cells can be designed into different sizes according to the needs of customers. After the external dimensions are designed, the corresponding molds need to be opened to stamp and form the aluminum-plastic film. The forming process is also called punching, which is to use a forming die to punch out a core-rolling hole on the aluminum-plastic film.
4. Packaging side sealing, top sealing process.
The packaging process includes two processes of top sealing and side sealing. The first step is to put the wound core into the punched pit, and then fold the unpunched side along the punched pit side.
5. Liquid injection and pre-sealing process.
After the soft-packed cells are sealed on the top side, x-ray must be done to check the parallelism of the core, and then enter the drying room to remove moisture. After standing in the drying room for a few times, it enters the liquid injection and pre-sealing process.
6. Standing, forming, fixture shaping.
After the liquid injection and sealing are completed, the cells need to be left to stand. According to the difference in the production process, it is divided into high temperature static and normal temperature static. The effect of standing is to allow the injected electrolyte to fully infiltrate the machine. , which can then be used to make
7. Two sealing process.
During the second seal, the first step is to puncture the air bag with a guillotine knife, and at the same time, vacuumize, so that the gas and a part of the electrolyte in the air bag will be drawn out. Then immediately carry out the second seal to ensure the airtightness of the cell. Finally, the air bag is cut off, and a soft-packed cell is almost formed.
8. Post-processing.
After the two air bags are cut, it is necessary to trim and fold the edges to ensure that the width of the cells does not exceed the standard. The folded cells will enter the capacity distribution cabinet for capacity separation, which is actually a capacity test.

Lithium Batteries May One Day Replace Conventional Submarine Diesel Engines

Lithium Batteries May One Day Replace Conventional Submarine Diesel Engines

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With the advancement of lithium technology, it is possible that lithium batteries may one day replace conventional submarines’ diesel engines. The Japanese Navy has already implemented the use of LIBs in its Soryu-class attack subs. South Korea is also testing the technology for their next-generation attack subs. Other applications for LIBs include the US Special Forces delivery vehicle, as well as the Russian Surrogat unmanned mini-sub.

However, the technology has its drawbacks. Lithium is flammable and can catch fire when exposed to water. Leaks in lithium can reach temperatures of 3,600 degrees Fahrenheit. Furthermore, a fire in a lithium battery releases hydrogen gas, which is highly flammable. While the benefits of using lithium batteries for submarines are numerous, there are still significant concerns about the safety of this technology.

While there are a number of downsides to lithium-ion batteries, the technology has proven to be reliable. Japan, for example, plans to build one more Soryu-class submarine with LIBs. The development of a LIB-submarine would also allow Japan to upgrade its older Stirling AIP powered Soryus. So, while LIBs present certain risks, they are expected to make an impact in the future of submarine propulsion.

While LIBs have some risks, these batteries have been proven to be safer than lead-acid batteries. The research and development of light-metal batteries will benefit from this data. The US Navy has already chosen lithium-ion main batteries for its KSS-III batch 2 submarines. In addition, South Korea has chosen to use lithium-ion batteries in its nuclear-powered Soryu-class boats. The seventh Soryu-class boat is also expected to incorporate a combination of Stirling Engines and lithium-ion batteries. These vessels will serve as a bridge between lead-acid and lithium-ion technologies.

The development of LIB batteries is a challenge for the lead-acid-powered submarines. They can’t be fully replaced by lead-acid batteries and will remain a major asset for the military for years to come. But the advancements in the technology have opened up new doors for submarines. The resulting improved performance means they can cruise for longer periods of time under the water.

Despite the risks of Lithium-ion batteries, they are the most reliable option for submarines. Although the lithium-ion batteries are safer than lead-acid batteries, they do have some drawbacks. In addition to high cost, they have high maintenance and are not completely safe to use in the ocean. Moreover, they are expensive to operate, requiring extensive maintenance.

The benefits of LIBs are considerable. In addition to their high-speed capability, they are also incredibly safe and durable. If the marine environment is a threat to the life of a submarine, it is essential to ensure that it is safe to use and a reliable and long-lasting power supply. Ultimately, LIBs will save lives. But for now, these batteries are not without risks.

Because of the huge benefits of lithium-ion batteries for underwater vehicles, they have many other advantages. Compared to conventional submarines, they have a lower cost than lead-acid submarines. They can also be operated for longer periods of time. This makes lithium-ion-powered subs an attractive option for many companies and governments. This technology can be used in other fields as well, including for commercial purposes.

The use of lithium batteries for conventional submarines could dramatically reduce their costs. The cost of lithium-ion batteries could be cheaper than traditional lead-acid batteries, and the technology may be more efficient than lead-acid. Additionally, the high-energy density of lithium-ion-based batteries will provide longer service life. They are also more reliable than lead-acid batteries.

The development of lithium-ion batteries for submarines is an exciting development. The advanced batteries will give the submarines better endurance under water, which is crucial for a modern submarine. These batteries may also be the main power supply for conventional submarines. They are not only cheaper than lead-acid batteries, but they are lighter, more efficient and more environmentally friendly. In the future, these submarines may use this technology to be able to operate at greater depths than ever before.