The 650mah battery
has become an indispensable part of people. We often see various safety accidents caused by the 650mah battery. The most impressive thing is the explosion and fire caused by the 650mah battery. Next, Chinahobbyline
, a professional 650mah battery seller, will introduce the reasons for the explosion of the 650mah battery in detail and bring you corresponding preventive measures.
Six reasons for the explosion of the 650mah battery
The following are the six main reasons for the explosion in the production and use of the 650mah battery summarized by battery manufacturer Chinahobbyline:
1. 650mah battery overcharged and exploded
If the protection circuit is out of control or the detection cabinet is out of control, the charging voltage is greater than 5V, causing the electrolyte to decompose, and a violent reaction occurs inside the 650mah battery, the internal pressure of the battery rises rapidly, and the battery explodes.
2. 650mah battery overcurrent explosion
If the protection circuit is out of control or the detection cabinet is out of control, the charging current of the 650mah battery is too large, causing lithium ions to be too late to embed, and lithium metal is formed on the surface of the pole piece, which penetrates the diaphragm, and the positive and negative electrodes are directly short-circuited to cause an explosion (rarely).
3. Explosion when ultrasonic welding 650mah battery plastic case
When ultrasonic welding plastic shell, due to equipment reasons, the ultrasonic energy is transferred to the battery core, the ultrasonic energy is very large, and the internal diaphragm of the battery is melted, and the positive and negative electrodes are directly short-circuited, resulting in an explosion.
4. 650mah battery explodes during spot welding
During spot welding, the current of the 650mah battery is too large, causing serious internal short circuit and explosion. In addition, during spot welding, the positive connection piece is directly connected to the negative electrode, so that the positive and negative electrodes are directly short-circuited and then exploded.
5. 650mah battery over-discharge explosion
Over-discharge or over-current discharge (above 3C) of the battery will easily dissolve the negative electrode copper foil and deposit it on the diaphragm, causing the positive and negative electrodes of the 650mah battery to be directly short-circuited to cause an explosion (rarely).
6. The 650mah battery explodes when it vibrates and falls
When the 650mah battery cell is violently vibrated or dropped, the internal pole piece of the cell is dislocated, and it is directly short-circuited and exploded (rarely).
Precautions for 650mah battery explosion
1. Avoid short circuit and overcharge of 650mah battery
Almost most of the safety accidents caused by the 650mah battery are caused by short circuits. We know that when the positive and negative electrodes of the battery are connected to each other in an abnormal path with a very small resistance, that is, a short circuit that we often say, a very large current and heat will be generated inside the battery, resulting in heat and excessive electrical energy. The release will not only cause serious damage to the battery life, but also for a 650mah battery that is sealed in a closed package, a certain pressure will be generated inside the battery, which will lead to a sudden increase in the internal pressure of the battery, and due to the very active chemical properties of lithium ions, it will eventually A situation occurs where the casing bursts and burns.
Due to the chemical characteristics of lithium-ion batteries, when we overcharge (overcharge) the battery, since the negative electrode of the 650mah battery cannot insert more lithium ions, the lithium ions are precipitated as metallic lithium on the surface of the negative electrode, resulting in the phenomenon of dendrite lithium. When the dendrite lithium grows to a certain extent, it will pierce the separator, causing an internal short circuit in the battery, and the separator will be damaged.
Therefore, when we use the 650mah battery daily, we should try to avoid short circuit or overcharge. However, for most digital products, the internal charging circuit will be equipped with a corresponding protection IC to avoid overcharging of the 650mah battery. , when the protection circuit detects that the 650mah battery has reached a fully charged state, it will automatically cut off the charging circuit. However, it is still not recommended to connect a mobile phone or other device to a charger in a powered state for a long time. After all, no one wants to bet with a small charging protection chip with their mobile phone or other devices or even personal safety.
2. Prevent 650mah battery from being pierced
Compared with short circuit and overcharge, piercing the 650mah battery is also a very unwise approach. If the 650mah battery is pierced by any hard object, the lithium ions inside it will directly react with the oxygen in the air, and the phenomenon of violent combustion will also occur.
For the 650mah battery itself or other electronic products containing 650mah battery inside, we usually see eye-catching trash can signs. If the 650mah battery is discarded at will, it will not only cause environmental pollution, but also more prone to fires during the garbage disposal process.
3. Avoid 650mah battery at high temperature
High temperature or fire will also cause the 650mah battery to explode and burn
Especially in hot summer or in a car that is exposed to the sun for a long time, the ambient temperature of the 650mah battery will be higher than its normal storage temperature. Therefore, when we use equipment containing lithium-ion batteries, we should try to avoid using it for a long time in an environment with excessively high temperatures. Although the 650mah battery will explode and burn for a relatively long time when it is directly roasted, but There will still be a sudden increase in its internal pressure, which is what we often call a bulge.
When our mobile phone battery or other lithium-ion battery is bulging, we should immediately cut off the power supply and stop using it to prevent the internal pressure from further increasing, and replace the battery with a new one.
Today, Chinahobbyline, a battery manufacturer, brings you the content about the explosion of the 650mah battery. I hope the above content can help you make better use of the 650mah battery and help you avoid unnecessary risks. For more information about the 650mah battery, please click Read below:What are the measures to prevent the explosion of 4s lipo battery?
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