MAX1555 and Ni chemistries

Status
Not open for further replies.

kender

Advanced Member level 4
Joined
Jun 19, 2005
Messages
1,425
Helped
138
Reputation
276
Reaction score
39
Trophy points
1,328
Location
Stanford, SF Bay Peninsula, California, Earth, Sol
Activity points
10,035
max1555

Folks,

In the past I've used MAX1555 (LDO charger for a single Li cell) with success for charging the Li-polymer batteries. Now I have a board with MAX1555, which was originally designed for Li+. I'd like to reuse the board in another project, but unfortunately, my time, budget and space constraints don't allow Li+ battery pack. What will happen, if I charge three (3) series Ni batteries with MAX1555? The nominal voltage would be +3.6V: about the same as one Li cell.

- Nick
 

max1555 solar

kender said:
...
What will happen, if I charge three (3) Ni batteries with MAX1555? The nominal voltage would be +3.6V: about the same as one Li cell.
- Nick

Hi Nick,

this will certainly not work, as 1.2V is the quiescent voltage of a NiCd or NiMH cell. To be able to totally load such a cell, you must provide at least 1.4V per cell, some more at higher temperature.
- erikl
 

Status
Not open for further replies.

Similar threads

Cookies are required to use this site. You must accept them to continue using the site. Learn more…