Lithium polymer batteries are used in many electronic devices.Just give examples of mobile phones, notebook computers, PDAs, walkman, etc.However, most lithium batteries are not designed to be used in remote control models. We use lithium batteries in remote control models. This is not within the application purposes considered when these lithium batteries were originally designed.Lithium polymer batteries are similar to lithium-ion batteries in that the single voltage is usually 3.6V, but unlike lithium-ion batteries, the lithium-ion battery shell is usually hard shell, while the lithium polymer battery shell is soft shell.General lithium polymer batteries are thin rectangles and have two protruding points above, one is the positive electrode and the other is the negative electrode.
According to the different electrolyte materials used in lithium-ion batteries, lithium-ion batteries are divided into LIB (Liquid Lithium-Ion battery, referred to as LIB) and PLB (Polymer Lithium-Ion battery, referred to as PLB) or PLB (Plastic Lithium Ion Batteries, referred to as PLB).
The positive and negative electrode materials used in polymer lithium-ion batteries are the same as liquid lithium-ion batteries. The cathode materials are divided into lithium cobalt oxide, lithium manganese oxide, ternary materials and lithium iron phosphate materials. The negative electrode is graphite, and the working principle of the battery is basically the same.The main difference between them lies in the different electrolytes. Liquid lithium-ion batteries use liquid electrolytes, while polymer lithium-ion batteries are replaced by solid polymer electrolytes. This Li-Po can be “dry” or “colloidal”. Most of them currently use polymer gel electrolytes.
So here comes the problem,
Will polymer lithium-ion batteries really explode? Li-Po batteries are widely used in mobile appliances such as notebook computers and smart phones because of their small size and light weight. When modern smart products are carried with you, their safety is particularly important, especially when more than half or even more of mobile phones are carried with them for 24 hours. So is the safety of polymer lithium-ion batteries really reliable? Will it explode?
Will Li-Po batteries really explode?
No, Li-Po battery has little possibility explode. Reasons are as follows:
1.Li-Po batteries use colloidal electrolytes, which are different from the liquid electrolytes of lithium-ion batteries. The colloidal electrolytes will not boil and will not produce a large amount of gas, thus eliminating the possibility of violent explosions.
2.Lithium batteries (Li-Po battery is one of lithium batteries) are generally equipped with protection boards and explosion-proof wires to provide security. However, in many cases, the effect is limited.
3.Polymer lithium batteries are packed in aluminum-plastic flexible packaging, which is different from the metal shell of liquid batteries. Once a safety hazard occurs, they will only bulge at most.
- As the skeleton material of polymer lithium-ion batteries, PVDF has excellent performance.
Precautions for Li-Po Batteries
generally internal short circuit, external short circuit, etc.Generally, it is easy to occur during the charging process, and poor bonding between the battery plates can also cause a short circuit.
Although most lithium-ion batteries now have anti-short-circuit protection circuits and explosion-proof wires, in many cases, this protection circuit may not work under various circumstances, and the role of explosion-proof wires is also very limited.
Polymer lithium-ion batteries, if the charging voltage is too high and the time is too long, the internal battery will continue to heat up, the internal pressure of the battery will increase, and the pressure will reach a certain level, causing expansion and rupture.And overcharge and over discharge will cause the reversibility of the chemicals inside the battery to be destroyed, which will seriously affect the life of the battery.
The chemical properties of lithium are very lively and it is easy to burn. When the battery is charged and discharged, the inside of the battery continues to heat up, the gas generated during the activation process expands, the internal pressure of the battery increases, and the pressure reaches a certain level. If there are scars on the shell, it will break, causing leakage, fire, and even explosion.And polymer lithium-ion batteries will only expand.
The battery is crushed and the battery is punctured.Since polymer lithium-ion batteries are colloidal electrolytes, it is difficult to reach the level of explosion.
Avoid use in high temperature and low temperature environments.High temperature exceeding 60℃ will cause irreversible damage to the isolation film inside the battery, resulting in the battery being scrapped.Too low temperature will reduce the performance of polymer lithium-ion batteries, resulting in battery capacity that cannot be released and cannot be used.
In conclusion, while it is impossible for a Li-Po battery to explode, the likelihood of catching fire happening is relatively low if it is used and stored properly. It is important to follow the manufacturer’s instructions and take necessary precautions to avoid overcharging, overheating, and physical damage to the battery. With proper care, Li-Po batteries can be a safe and reliable power source for various electronic devices.