The relationship between charging times and attenuation of 12V lithium battery

The explanation of 12 v lithium-ion battery charging frequency and attenuation relationship is as follow.

The 12V lithium battery application and common, mobile phones and digital products, tablets and laptops, electric tools, electric bicycles, electric cars, after times the power and energy storage and other fields. The lithium battery type of varied also.

One, the charge and discharge rate

Charge and discharge ratio is high, the better. "C" to describe the size of the battery charge and discharge current special symbols.1 c discharge is 1 hour from full charge of the battery into the empty current size.

IPhone6 battery capacity is 1810 mAh, so the battery 1 c discharge current is 1.81 a.

The e6 electric car for use in each battery capacity is 200 ah, is this battery 1 c discharge current is 200 amperes.

If a battery with a high rate discharge, usually emit less energy than low range.

Second, charge and discharge cycles

The more cycles, the better.500 is the common value of lithium-ion batteries, according to the different material of lithium battery charge and discharge frequency range from 300-3000.The value of the specific meaning each factory may be slightly different, can be roughly interpreted as: as stipulated in the manufacturer's charge and discharge rate (for example, 1 C discharge charging 0.3 C; Each time from 0% to 100%, according to the loop), after a 500 - cycle, 80% of the battery capacity with the original. The relationship between charge and discharge times and habits is too big, we give some examples.

1, the influence of the charge and discharge intensity of cycles

Factory mark: every time from 0% to 100%, 1 C and 0.3 C, filling capacity attenuation to 80% after 500 times, this is the most rigorous test cycle, also can not so strict, see below

If every cycle of power from 25% to 75%, 1 C, 0.3 C, filling capacity attenuation to 80% after 2000 times

If every cycle of power from 25% to 75%, 3 C and 0.3 C, filling capacity attenuation to 80% after 1600 times

2, a pale imitation of life

Factory mark: every time from 0% to 100%, 1 C and 0.3 C, filling capacity attenuation to 80% after 500 times, is the most rigorous test cycle, also can not so strict, see below

Every time the cycle of power from 25% to 75%, 1 C, 0.3 C, filling capacity attenuation to 80% after 2000 times

Every time the cycle of power from 50% to 100%, 1 C, 0.3 C, filling capacity attenuation to 80% after 1800 times

You can see these two examples to charge and discharge of the smaller the ratio, the more conducive to improve service life; Shallow filling is also beneficial to improve service life.

Third, internal resistance

Internal resistance as small as possible, this parameter change by load weight, temperature, etc. At any time, as the battery life decreases, internal resistance has also been gradually increased. Internal resistance, the smaller the batteries can be higher rate of charge and discharge, 18650 common battery internal resistance of around 50 m Ω, power type18650 batteryAt about 15 m Ω. Want to know how need to use special equipment to measure the internal resistance, not ordinary multimeter.

Four, battery consistency

Use the same materials, the production of the same battery on the capacity, internal resistance, charge-discharge curve consistency, the higher the better. Whether large-scale battery of battery pack that is critical, the bigger the battery pack for the higher consistency requirements.

According to the different application fields, make a detailed analysis on every parameter.

Electronic with lithium batteries, such as the mobile phone, tablet, laptops and mobile power with lithium batteries, electric bicycle with lithium batteries, electric vehicle with lithium-ion batteries.

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