No harm, please rest assured
1, car charger is commonly used for car battery (car 12V, truck 24V) powered car charger, widely used in a variety of portable, handheld equipment lithium battery charging field, such as: mobile phone, PDA, GPS, etc.; Car charging should not only consider the actual needs of lithium battery charging (constant voltage CV, constant current CC, overvoltage protection OVP), but also take into account the harsh environment of the car battery (transient peak voltage, system switching noise interference, EMI, etc.); Therefore, the power management IC selected by the car charging scheme must meet the following requirements: high voltage resistance, high efficiency, high reliability, low frequency (conducive to EMI design) switching power chip; Generally speaking, it is required to \"leather\".
2, the car charger is to facilitate the owner to use the car power supply to charge digital products anytime and anywhere accessories. Some high-end car chargers generally include 2 USB interfaces, which can charge two digital products at the same time. Such products generally have overload protection, short circuit protection, high voltage input protection, high temperature protection, four safety protection functions to ensure safe use. Car charger in the car at the same time, but also home, to achieve car charging, direct charging, USB charging three-in-one multi-functional use.
3, the principle of the car charger is to reduce the voltage of 12 volts to 5 volts after charging the mobile phone, due to the price limit of the charger, the circuit has many defects, the protection function of the circuit is almost no, if the buck and current limiting circuit failure, it will lead to 12 volts directly into the mobile phone, the mobile phone will die. It is still recommended to use the vehicle inverter up to 220 volts, and then use the original charger to charge, so it is safe for the mobile phone battery. Where the car charger is inserted above the car, the output voltage is DC point, which is the voltage between 12v and 24v. If the quality of the car charger is not very poor, it will not affect the charging of the phone, but it is recommended not to use it often.
There is harm, because it will lead to the phenomenon of short circuit of the battery, the voltage of the car fast charge head is too high in the process of use, so it will lead to short circuit and cause damage to the battery battery
Fast charging is harmful to the battery, in the process of fast charging, the battery temperature will rise, and the battery life will be shortened in a high temperature environment for a long time. There are many consumers will buy pure electric vehicles or electric bicycles, this electric vehicle is a battery, some electric vehicles use lithium batteries, some use lead-acid batteries. In principle, the battery damage basically comes from two aspects:
1, when the battery is charged and discharged, the cathode and anode of the battery will shrink and expand with the release and absorption of ions, and fast charging will destroy the chemical substances on the battery, resulting in shorter battery life;
2, when the battery is fast charged, due to the relatively high current, the thermal effect of the current will be aggravated, resulting in high temperature of the battery, which affects the safety and stability of the battery, resulting in sudden capacity reduction and permanent damage to the battery cell.
First of all, it is certain to tell you that there is harm, fast charging is high voltage and high current, and the battery is easy to bulge and shorten the service life. It is recommended to use as little as possible.
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1, if the battery density, material, temperature and battery management system of electric vehicles are designed very reasonably, the impact of fast charging on the battery will be within a reasonable range, and it can also be simply understood that the battery will not be harmed.
2, electric vehicle battery charging speed, depends on the battery density, temperature, material these three indicators. That is to say, one of these three indicators is not up to standard, and fast charging is damaging to the battery. In addition, the role of the battery management system is also very important, which is to control the input current and voltage when the battery is charged, and reduce the damage to the battery as much as possible.
3, but no matter how accurate the battery management system is, in fact, fast charging will damage the battery, but the damage is in a reasonable range, so it can be used with confidence.
4, in summary, is the impact of fast charge on the battery, occasionally use fast charge can also be, under normal circumstances, it is recommended to slow charge,
The reason why fast charging piles can save charging time is generally achieved by increasing the current. However, increasing the current is bound to cause the battery to withstand higher voltage, so if the battery is charged with high current for a long time, the increase in internal resistance will lead to Joule thermal effect, which will cause the power battery to heat up, affect the internal chemical reaction, and cause a certain degree of damage.
For lithium batteries, the higher the fast charge power, the greater the heat naturally, because the temperature of the positive electrode is much higher than that of the negative electrode, when the negative temperature is too low, it will produce the lithium out effect, the lithium out process will lead to the reduction of lithium ions, and eventually lead to the reduction of battery capacity, which will affect the battery life.