Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronic Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

Register Log in

Lithium-Ion Battery Charging

pgr2002

Member level 2
Joined
Aug 1, 2013
Messages
53
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,286
Location
Hyderabad, India
Activity points
1,716
For charging a litiumion Battery of 3.7v capacity, we use charging module(s). I use a small and convenient size charging module with IC TP4056 module, which protects against overload as well as under charging. Now do we need to connect a BMS to this charging process. What I mean to say is : Do we require both of them in the circuit or only a TP4056 module is enough.
 

c_mitra

Advanced Member level 5
Joined
Nov 13, 2012
Messages
3,551
Helped
886
Reputation
1,774
Reaction score
854
Trophy points
1,393
Activity points
27,631
For charging a litiumion Battery of 3.7v capacity, we use charging module(s)
They are designed for use with single cells; the BMS is designed to be used for a battery- a group of cells connected in series. You should use only one of them, not both.

If you use a single cell module, you need to take out the cells from the battery and use a specified charger. The BMS also acts as a charging module.
 

KlausST

Super Moderator
Staff member
Joined
Apr 17, 2014
Messages
18,945
Helped
4,215
Reputation
8,433
Reaction score
4,160
Trophy points
113
Activity points
124,552
Hi,

When I look at the TI internet site for BMS, then I find folowing subsections:
* chargers
* fuel gauges
* monitors and balancers
* protectors

So your BMS .. what does it do? What features does it have?

Klaus
 

pgr2002

Member level 2
Joined
Aug 1, 2013
Messages
53
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,286
Location
Hyderabad, India
Activity points
1,716
I have with me some charger modules with protection from overload & undercharging. I also have few BMS. So for charging more than 2 cells, we charge through BMS and for single cell charging only one module is required. thanks for the replies I got.
 

treez

Advanced Member level 5
Joined
Sep 22, 2008
Messages
7,679
Helped
568
Reputation
1,139
Reaction score
543
Trophy points
1,393
Location
cambridge
Activity points
76,865
Yes, a BMS can actually comprise an SMPS, or even several SMPS's, often flybacks, which pump charge out of any of the series cells, and back into the overall series call stack, so that no cell overcharges.

But a BMS can also be far simpler than that...in other words, just say a comparator across each cell, and indicating when that cell has reached full charge.
--- Updated ---

..oh i see TP4056 is a linear regulator with vin(max) = 8V...so you can only use it to charge 1 Li cell anyway.
 

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Top