Battery Management / Charging / Discharging Solutions

[ChristopherN]

Hi,

I'm building some test hardware that will be used on the go and in vehicles. So I'm looking for a matching battery pack with BMS and charger. This is low volume stuff, so I'm searching for of the shelf solutions.

Most of my systems run off one 5VDC supply. I'm are drawing up to 4A peak, idle current 0.5A. I need something like 60Wh to get a useful life out of the system. I would like to have a single power input for the device that should charge the battery pack but will also act as a pass-thru if the battery is charging or full and the system is still connected to external power. Input voltage should be something like 9-32VDC.

I like to have some information about the battery status, like a fuel gauge, voltage, number of cycles and so on.  It would be great if the solution could support an external power button as well as shutdown thru software.

Can anyone suggest a decent solution?

Thanks

Christopher

[Rerouter]

As you already have some processing power, the cheaper options actually tend to just be interfaces for the host,

texas instruments have a great bunch of options depending on how many cells your going form

As your running off of 5V, with a lower spec of 9V, it sounds like 2-3S would suit you, so that the 5V system only needs a single buck converter rather than a sepic,

you can split this problem into 2 parts, 1 is a BMS / balancing charger, the other part is a battery changeover switch, the switches are dirt cheap, the BMS for 2-3S are generally under $2 for an IC with balancing,