with2ls
Junior Member level 3
I am working on a low power project that uses a rechargeable 3.7V lithium-ion coin/button cell (probably in the 2032 size range). Standard discharge current is <1mA with pulses up to 30mA. Standard change current is ~10mA.
Although it's highly unlikely over the lifetime of the product, the battery can be replaced by a professional. Can anyone give me some advice or point me to some app notes that discuss battery protection for rechargeable lithium-ion coin cells? The standard approach of using a battery protection IC to prevent OV, UV, and OC seems like overkill for low energy batteries like these (I also have very limited space). The battery charging circuit is set to 4.2V and contains some powerpath functionality, allowing it to cutoff the load at a low voltage (UV protection).
The following battery datasheet:
even states:
Protection Circuit
Protection circuit can be provided upon request. However, protection circuit may be omitted for most applications without damaging performance and safety. Please consult our engineering staff for technical advice.
Any advice or guidance would be greatly appreciated. I would consider making the battery non-replaceable if it meant simplifying the battery protection circuit (if more is required).
Although it's highly unlikely over the lifetime of the product, the battery can be replaced by a professional. Can anyone give me some advice or point me to some app notes that discuss battery protection for rechargeable lithium-ion coin cells? The standard approach of using a battery protection IC to prevent OV, UV, and OC seems like overkill for low energy batteries like these (I also have very limited space). The battery charging circuit is set to 4.2V and contains some powerpath functionality, allowing it to cutoff the load at a low voltage (UV protection).
The following battery datasheet:
even states:
Protection Circuit
Protection circuit can be provided upon request. However, protection circuit may be omitted for most applications without damaging performance and safety. Please consult our engineering staff for technical advice.
Any advice or guidance would be greatly appreciated. I would consider making the battery non-replaceable if it meant simplifying the battery protection circuit (if more is required).