What is the difference between 18650 batteries with a protective plate and no protective plate?

The lithium battery has a protective plate, which can control the lithium battery to work in the specified working environment without explosion, burning, etc.; the lithium battery without the protective plate is prone to explosion, burning, etc.

With the protection board battery, the charging protection voltage can be protected at 4.125V, the discharge protection can be protected at 2.4V, and the charging current can be within the maximum acceptance range of the lithium battery; the battery without the protection board will overcharge and over discharge. Over current, the battery is easily damaged.

Why should I add a lithium battery protection board? Because the working environment of the lithium battery has special requirements, it can't be overcharged, it can't be over-discharged, it can't be over-temperature, it can't be over-charged and discharged. If it is, it will explode, burn, etc. It will be bad, and it will cause serious social problems such as fire.

What are the benefits of the 18650 battery with and without a protective plate?

The 18650 we often say refers to the shape of the battery. It is a standard battery model, of which 18 means the diameter is 18mm, 65 means the length is 65mm, and 0 means cylindrical battery. The 18650 battery originally referred to the nickel-hydrogen battery and the lithium-ion battery. Since nickel-hydrogen is now used less, it is now more than a lithium-ion battery. The nominal voltage of the single section of the 18650 lithium-ion battery is generally: 3.6V or 3.7V; the minimum discharge termination voltage is generally 2.75V. The common capacity is 1200 ~ 3100mAh, higher than 3400mAh is basically a virtual standard. Most of the explosion-proof flashlights, glare flashlights, and other portable lighting equipment commonly used in lighting equipment use 18650 lithium batteries as the power source. Because 18650 battery has the advantages of large capacity, long life, high voltage and stability, it is very suitable for portable lighting equipment such as strong light flashlight.

Some readers have some doubts about the 18650 battery with and without the protective plate. What are the benefits of sharing the 18650 battery with and without the protective plate?

With protective plate suitable for all people, there is over-discharge protection: When the battery is running out, the voltage will reach the required minimum value, the protection board will also be closed, the discharge will not be discharged, and the product will automatically shut down, forming a kind. Over-discharge protection. Overcharge protection: When charging the product, when the voltage reaches the maximum voltage of the battery (4.2V), the protection board will automatically turn off and the display will be full and will not continue charging. An overshoot protection formed. Short-circuit protection: When the battery is inadvertently short-circuited, the protection board will automatically turn off within a few milliseconds, and will not be energized. At this time, the positive and negative poles will touch one piece and it will be fine. A short-circuit protection will not cause an explosion event. Over current protection: When the battery is discharged, the protection board will have a maximum current limit. Different products are different. When the discharge exceeds this current protection board, it will automatically close.

The 18650 battery without the protective plate is shorter than the battery with the protective plate, and some devices cannot use the battery with the protective plate due to the initial design. Without a protective board, the cost is low and the price is relatively cheap. Lithium battery without protection board is suitable for experienced use, generally do not put and charge, service life is similar to the belt protective plate.

The difference

18650 lithium batteries with battery protection board and without protection board, the difference is as follows:

1. The battery without the plate is 65mm height, and the plate is 69-71mm.

2. Discharge to 20V, if the battery reaches 2.4V, it will not discharge, indicating that there is a protective board.

3. Touch the positive and negative levels. If there is no reflection of the battery after 10 seconds, it means that there is a protection board. If the battery is hot, there is no protection board.

Note: The third test, if you are not a professional, must not be tested as it may cause a powerful explosion, causing irreparable personal hazards, especially those inferior batteries.

The page contains the contents of the machine translation.