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Some misunderstanding about lithium ion battery

Published time: 2017-1-15 8:21:16, Publisher: Green Energy Battery Co., Ltd

1. The higher discharge voltage platform the better?

Normally the discharge voltage platform ( DVP ) is defined as the discharge time when the cell's voltage down to 3.6V at 1C current. There are lots of factors to make the DVP such as temperature, capacity, cell tructure, separator, electrolyte….etc, some cell maker use raw material with smaller particle size or thinner separator to achieve

higher DVP, but, in the meantime they always sacrifice the safety characteristic of cell.

2. The lower impedance the better cell?

You can not judge cell only by its impedance cause impedance is only the summary of the whole “cell circuit” which including the material, welding…, normally, it do not mean anything.

3. The capacity higher the better?

The same reason as above, some cell maker sacrifice the safety characteristic of cell to achieve higher capacity, it's not responsible, so, normally, a particular capacity mean

unstable.

4. It's better to charge the cell while it's exhausted

We recommend the best charge time is about 70% discharge which may prolong cell's life.

5. What is a short circuit?

If the positive and negative terminals of a battery come into contact with each other or with a conductive metallic object, this can cause a short circuit, which generates heat. If cells or batteries are stacked on top of each other or mixed, the resulting short circuit can lead to heat generation, leakage, rupture, and possibly fire.

6. May I charge Primary Lithium batteries?

When a Primary Lithium battery is charged, gas is generated inside the battery and can result in swelling, heat generation, leakage bursting and fire.

7. Can I force-discharge lithium batteries?

When batteries are force-discharged with an external power source, the voltage drops to under 0 volts (which is called voltage reversal) and internal gas is generated. This can

lead to swelling, heat generation, leakage, rupture or fire.

8. Can I use Lithium batteries mixing with other battery types?

If different types of batteries are used together, or new batteries are used with old ones, the difference in characteristics of voltage, capacity, etc., may cause over-discharge of the battery which is exhausted first, leading to swelling, bursting or fire.

9. Where should lithium batteries be stored?

Lithium batteries should be stored in a cool, dry place that is not exposed to direct sunlight and has minimal temperature variation. Storage in areas subject to high temperature or humidity may cause deterioration in battery quality and durability. To avoid short circuiting batteries during storage, be sure that the positive and negative terminals do not come into contact with each other.