Standard methods to prevent over discharge of Li-po 3.7V battries

[Johnny101]

What are the standard methods used industrially or in general to prevent over discharge of Li-po 3.7V batteries?

 

[KlausST]

Hi,

* there are dedicated LiIon protection circuits. Look at their datasheets
* You may find specifications in the LiIon battery datasheets.

**
In general over-discharge is protected by watching the LiIon battery voltage. With too low voltage the switch to the load is switched OFF.

Klaus

 

[Johnny101]

Hi,

* there are dedicated LiIon protection circuits. Look at their datasheets
* You may find specifications in the LiIon battery datasheets.

**
In general over-discharge is protected by watching the LiIon battery voltage. With too low voltage the switch to the load is switched OFF.

Klaus

I have searched Lipo protection circuit. I am using Lipo battery with model number 754060. It says that protection is already in it which will protect it from over discharge but I am not getting what is inside that. What ICs are being used?

 

[Audioguru]

Please provide a link to the datasheet for the battery or at least the manufacturer's name.

 

[Johnny101]

Please provide a link to the datasheet for the battery or at least the manufacturer's name.

**broken link removed**
Above is the link for the battery I am using.

 

[Audioguru]

Other cheap Chinese batteries from Aliexpress have an ad that says, "With protection Board" in good English, but this one says, "A protective plate with a rich grain products" which is a useless Chinese translation into Engrish. Therefore it s probably packaged in a fancy wood box with rich grain and it might or might not have a protection circuit.

 

[ted2]

LiPo and LiIon batteries are very picky about charging and discharging rules. Also, for instance excessive overcharging not only destroys the battery, but it can lead to catastrophic failure (in other words, an explosion or fire). Similar risk is in case of large over-current (or outright short circuit) Therefore a good battery has a protection circuit limiting voltages and currents.

In addition to the protection circuit, the normal charging and discharging have to be controlled properly, or the battery's life time will be seriously shortened. An excellent explanation and instruction is on page

The charging control is easiest to implement with a specialized IC because the current and voltage control rules are non-trivial, and even a minor over-charge or over-discharge will damage the battery, or at least tend to shorten its life. There are also rules regarding temperature: Charging should not be done in too cold or too warm. As a rule-of thumb, don't charge below 0 Celsius, or over 45 Celsius. Discharging temperature limits are typically -20 to +60.

 

[circuitboardready]

Hi,
these battery is included a protective circuit. There are many battery charging IC for over charge, over discharge or over heat protection