How to Protect Lithium Battery

In theory, there is not much electronic technology in the power multiple battery protection panels, such as circuits and software processing, and there are too many options. It is mainly how to make the protection part stable, reliable, safer, and more practical, and of course the price is one of them. Want to really want to do it well, it is a very complex careful and long cycle of work. If you want to use the ratio of experience to technical value, technology only accounts for 20 %. 80 % of experience. It is difficult to do a good job of the power battery Protection board without three or five years of experience. Of course, being good and being good are two different things. Why did you come to this conclusion?

The scheme circuit of the protective plate is not complicated. As long as you work in the battery electronics industry for a year or two, it is not difficult to design a circuit and copy a circuit. For example: Multiple power batteries He is mainly high voltage, large current, high internal resistance work(Micro current), battery package work environment considerations, etc., which involve many years of comprehensive experience in electronics. It is large enough to understand the entire PACK, as small as a resistor, the type of capacitor or transistor, or the careful details of the cloth plate. In a word, the protective plate is mainly a stable, reliable, and safe protective battery pack, which guarantees the normal and safe use or use of the battery pack for a longer period of time. Other added unique technologies and functions are floating clouds. Let's talk about it.

The power battery protection plate, as its name implies, is used to protect the battery from damage and extend the battery's service life. And it only provides the most stable and effective protection against accidents in the event of extreme battery problems. It's not usually a move, of course, and surveillance is a must, just like the fuse or fuse in our appliances. This is the purpose of this article's discussion and analysis.

Protection Projects and Points for Attention

One, voltage protection: Overcharge, overcharge, this must change depending on the material of the battery. This seems simple, but in detail, it is still experienced.

Two, overcharge protection, in our previous single-section battery protection voltage will be more than battery full voltage 50 ~ 150mV. But power cells are different. If you want to extend the battery's life, your protection voltage will choose the battery's full voltage, or even lower than this voltage. For example, manganese lithium batteries, you can choose 4.18 V ~ 4.2 V. Because it is multi-numbered, the lifetime capacity of the entire battery pack is mainly based on the cell with the lowest capacity. The small capacity is always working at the high current high voltage, so the attenuation is accelerated. The large capacity is light and light each time, the natural decay is much slower. In order to allow the small capacity of the battery is also lightly charged, so overcharged protection voltage points do not choose too high. This protection delay can do 1S to prevent the impact of the pulse and thus protect.

Three, Over-protection is also related to the material of the battery. For example, manganese lithium batteries are generally selected at 2.8 V to 3.0 V. Try to be slightly higher than the voltage of its single battery. Because, in the domestically produced batteries, after the battery voltage is lower than 3.3 V, the discharge characteristics of each battery are completely different, so the battery is protected in advance, which is a good protection for the battery life.

The whole point is to let every battery work as lightly as possible. It must be a help to the battery life.

Over discharge protection delay time, it will change depending on the load, such as electric tools, his starting current is generally above 10C, so the battery voltage will be pulled to the over voltage point in a short time to protect. The battery can not work at this time. This is a place worth noting.

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