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Electric car spontaneous bonding reason: The root causes in the battery because of this 5 o'clock

著者:Iflowpower – Fornitur Portable Power Station

In recent months, my country's new power, "lead sheep" - Akai car suddenly "fire". In just two months, there are many safety hazards in the usa, most of which are automotive spontaneous combustion events. First in late April, Xi'an is a free electric car in the an electric car; then in mid-May, the Shanghai is charging the ES8, and it has passed less than a month, and there is a media exposure to ES8.

Spontaneous combustion in a parking lot in Wuhan. In view of the frequent spontaneous spontaneous accidents, it is aura for some models, involving up to 4,803 flights. The "source" of the above electric vehicle self-ignition accident is the power lithium-ion battery.

Today's power lithium-ion batteries are mostly lithium ion batteries, the latter is a chemical battery. If the positive and negative short circuit of the lithium ion battery will heat, it will cause the battery to expand, which in turn causes the electrolyte leak, which is easy to contact the oxygen in the air and a fire explosion. The above is the reason why the electric vehicle has spontaneously analyzed, then from the "macro", what is the cause of self ignition in electric vehicles? First, the quality of the dynamic lithium-ion battery does not meet the standard, the power lithium-ion battery manufacturer is designed, when making a battery, the safety of its use will take into account the safety of its use.

Usually, a diaphragm with numerous fine holes can be added, and the quality of the quality diaphragm can effectively shield the positive and negative ions when the internal temperature is too high, to prevent short circuits. Instead, some manufacturers have the power lithium-ion battery, which may cause the quality of the separator, so that the quality is not up to standard, this has a big safety hazard. Second, the new energy car company "fire" measures are not in place, select the power lithium-ion battery supplier, and the new energy car enterprises related to related experience will be a series of "fire measures".

For example, Tesla is equipped with a temperature control device at the electrical pole, so that the resistance increases with the increase in temperature in the core, so that the effective limit of the current is too large and prevent overheating from preventing overheating. At the same time, Tesla also has an emergency cutting device inside the battery cell. When the internal current is too high, it will automatically "disconnect".

Some new energy cars that are not in this area, their models are more likely to spontaneous combustion. In addition to the above two points, users are using the improper behavior of the new energy car process, and it is easy to cause spontaneous combustion of new energy vehicles. Improper behavior 1: New energy owners don't care how to cherish the vehicle when using the car, and it is not mistaken in rain and snow, but also occurs from time to time or dragging.

It is easy to cause damage to the battery pack. In this case, if it is not in time to check the chassis for a chassis, there is a security hidden danger. Improper behavior 2: The new energy owner charging operation is not standardized, or it may cause self-combustion in the car.

For example, use a non-compliant charging pile or charging cable to charge the vehicle, long this, the battery may damage the battery, thereby adding the probability of spontaneous combustion in the power lithium-ion battery. Improper behavior 3: New energy owners may be modified or installed for various reasons for various reasons. In this way, its battery may have enhanced in terms of endurance; but may leave safety hazards to the power lithium-ion battery.

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