What is the cause of the lithium battery pack charging heat? Is it normal for a lithium iron phosphate battery pack to get hot during charging? What is the reason for this? Lithium battery pack charging heat, a simple explanation is the chemical reaction to generate heat, lithium battery heat is a normal phenomenon, which is a process of energy conversion, heat is part of the conversion of electrical energy into heat. LiFePO4 battery may be the battery itself fault problem, may be due to battery aging, internal resistance becomes large, electrolyte dry, internal short circuit, etc. caused by heat, this article to talk in detail about the causes of lithium battery pack fever.
What is the lithium battery pack heating phenomenon?
Lithium iron phosphate battery pack heating is a common phenomenon in life, often appear in the use of lithium batteries as a power source of cell phones, laptops and other wireless home appliances, due to lithium battery pack in the discharge of the battery internal chemical reaction will occur, generating a lot of heat, resulting in lithium iron battery temperature increases, so that we will feel the temperature when touched by hand, which is a common phenomenon in most lithium batteries.
What is the cause of the lithium battery pack charging heat?
Lithium battery pack charging heat may be the problem of lithium battery failure, may be due to battery aging, internal resistance, electrolyte drying, internal short circuit, etc. caused by heat, there may be lithium battery charger problems, the general charger does not have a pulse function, not to mention the negative pulse elimination polarization function, such chargers usually can not be charged in the late constant voltage, so that the battery caused a lot of gas, water loss, heat.
Generally speaking, the lithium battery pack charging heat for four reasons.
⒈ lithium batteries and chargers do not match, rarely consider the charger and lithium battery pack voltage, current matching. Charging with these mismatched chargers will lead to excessive heating of the electric car battery charging.
⒉ battery failure or serious water loss, you should check the battery or replenish the liquid for the battery, the battery used for more than fifteen months needs maintenance and water.
The charging environment of the lithium battery pack is too hot, and the charging place should be well ventilated and avoid high temperatures.
Unregulated charging is a common cause of lithium battery pack heating.
In short, they are prone to explode if they are not used correctly.
What are the hazards of lithium battery pack heat?
1. excessive heating of lithium iron battery pack for a long time will lead to an increase in the temperature of the internal parts, affecting the normal work of the machine.
2. Long time heat of lithium battery pack will increase the heat of the battery itself, if it is a sealed battery will make its internal air expand violently, resulting in the battery like an external protrusion, which will cause the battery to explode in serious cases.
3. Long-term excessive heating of the lithium battery pack will accelerate the aging process of the product itself and shorten its life.
How to prevent the lithium battery pack charging heat?
1. The use of high-current chargers should not be too long, too long charging will cause damage to the lithium battery, but also generate heat.
2. It is best to use the original Li-ion battery pack charger, and buy products with guaranteed quality or good reputation for quality.
3. If you are not in a hurry to use, it is recommended to take out the lithium battery for charging, not to cause the battery to heat up.
4. When the lithium battery pack temperature rises, such as feeling a little hot, you should immediately stop using or change the battery to use, such as in the charging then immediately unplug the charger.
Lithium battery can not be charged after over-discharge how to do?
First of all, open the machine, remove the internal battery, measure the most normal voltage, indicating that the lithium battery pack is not damaged. Analysis of the cause may be due to the lithium battery pack charger has a charging control link, the over-discharged lithium battery can not be charged. So try to add 5V DC directly to the battery's lead wire ends to force charging, the charging current is very high at the beginning, and then the current gradually decreases and stabilizes over time. After 6 hours of charging the battery back to the original junction, the power on and play all normal. A few days later, when used to insufficient power, with the original charger can be charged normally again.
Summary: In recent years, lithium iron phosphate battery packs began to be widely used, such as data centers, communication base stations, medical equipment, new energy vehicles, special modified vehicles and so on. Lithium battery pack in the case of low power, the sudden entry of high current, will lead to damage to the lithium battery, because the current is high, heat is also fast, the battery life will become shorter. Therefore, usually use the correct method to charge the lithium battery pack.
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