Electronics > Beginners

2s Life Charger

(1/2) > >>

Dave Wave:
I have a project that uses a 1500 mah 2S Life battery for power (A hobby battery with leads for power and a balance lead).

I want to be able to charge it in the device through the balance lead.

I was hoping to find a board I could build into the device that would charge and balance the device.

I found a couple TP5000 charger boards,  1S chargers so I assume if I try to run two in parallel, it will lead to isolation issues? Would it make a difference if I powered each Tp5000 from and individual buck/boost supply?

https://www.ebay.com/itm/TP5000-3-6v-4-2v-Charger-Module-3-7v-Lithium-ion-3-2v-LiFePO4-Battery-Charging/143482390497?epid=2305263656&hash=item21683787e1:g:46oAAOSwA-VeAyMh

I also found a BMS board that is supposed to balance the boards and do protection, but does not have an integral charger.

https://www.ebay.com/itm/2S-3S-4S-18650-Lithium-Li-ion-LFP-LiFePo4-Battery-BMS-Protection-Board-W-Balance/312772150203?ssPageName=STRK%3AMEBIDX%3AIT&var=611500761627&_trksid=p2057872.m2749.l2649


Any ideas how to put this all together with something that can safely charge a Life battery?

Thanks,

-Dave

aix:
I'll let someone more qualified chime in on the balance charging aspect, but I wanted to mention that TP5100 natively supports 2S batteries (as well as 1S).  There are plenty of boards on eBay, AliExpress etc.

mvs:
TP5100 is a Li-ion charger with 4.2/8.4V cutoff, a bit to high for LiFePO4 battery.

CN3722 should work fine.

beanflying:
Most BMS boards are not chargers as well. The basics of them is they are simple voltage protection for each cell that breaks the circuit using a fet.  So they are only a protection device and not an appropriate method to charge cells with as their is no multistage or current control.

With using seperate 1S charge boards I have used these eBay auction: #371947835700 and providing you don't need high charge rates they work fairly well. Just pay attention to the datasheet and give yourself some head room.


Dave Wave:

With using seperate 1S charge boards I have used these eBay auction: #371947835700 and providing you don't need high charge rates they work fairly well. Just pay attention to the datasheet and give yourself some head room.
[/quote]

I'm confused.  My understanding is that the 1S boards can only do 1S, there is now way to set them up to do 2S (using two modules, due to common ground issue). Not true or did I just misunderstand you are using 1S board and 1s battery?

Thanks,


-Dave

Navigation

[0] Message Index

[#] Next page

There was an error while thanking
Thanking...
Go to full version
Powered by SMFPacks Advanced Attachments Uploader Mod