Battery fuel gauge IC

[shemozzle999]

Google Texas Instruments datasheet for this IC: ICBQ34Z100PW.

I have the 1Mb pdf but cannot host it here as it exceeds the file size limit,

 

[averhamdave]

Before I do, give us a clue what I will find

 

[shemozzle999]

Before I do, give us a clue what I will find

It is a device to monitor the health of a battery direct from the BMS and is programmable for both Li ion and LiFEpO4 from 1 to 12 cells.

 

[trex]

the way it monitors the battery is very interesting.
http://www.ti.com/lit/ug/sluu904/sluu904.pdf

 

[Jaunty]

the way it monitors the battery is very interesting.
http://www.ti.com/lit/ug/sluu904/sluu904.pdf

Is that "interesting" as in "possibly dubious", or "interesting" as in "novel and might be useful", please?

It seems to require connection to the bike's system at 3 points; are those points easily accessible on a CyclEzee battery and motor system, please?

Oh, and how much does it cost and where would I get it, please?

Thanks. JT

 

[trex]

you need to place a small value (5milliOhm) resistor in series with the battery and also connect the test module to the charging port. All these points are easily accessible.
The point is, you have a reference design that lets you connect to a general WIFI system like BTFON with not much effort.
The test module costs $50, you would also need to connect it to a PC of some sort. This chip ($3 on its own) can be added to any BMS. Farnell stocks it.
IMHO, the archilles' heel of e-bikes is the limited life of batteries. If you can make the batteries last 10-15 years, a lot more people would want to buy them. The problem is not the battery chemistry but mainly temperature, bad charging and discharging profiles. This chip goes a long way to address these issues.