Breaking News
Comments
Newest First | Oldest First | Threaded View
cgul
User Rank
Author
re: Implementing battery charger using Li-ion
cgul   9/27/2012 6:39:20 PM
NO RATINGS
Implementing battery charger using Li-ion. I have used Linear Technologies battery chargers for Li-Ion and Li-Poly. They work great. Using digital pots in place of fixed resistors for the charging voltage and charging current. These of course controlled with a micro-controller. life doesn't get any better than that. The micro allows for charging algorithms to suit different battery chemistry's and provides for status flexibility. It doesn't get any simpler than that. Piece of cake.

anne-francoise.pele
User Rank
Author
re: Implementing battery charger using Li-ion
anne-francoise.pele   7/16/2012 3:25:01 PM
NO RATINGS
In Part One of this two-part article, Cypress describes different types of rechargeable batteries, their differences and how to select a battery technology for a specific application. The article is available here: http://www.eetimes.com/design/smart-energy-design/4375627/Battery--The-source-of-a-device---Part-1?Ecosystem=smart-energy-design

Hughston
User Rank
Author
re: Implementing battery charger using Li-ion
Hughston   7/9/2012 4:09:09 PM
NO RATINGS
I don't think they mean to use the PSoC strictly for this function, but as a part of the overall PSoC system function. The battery health can be judged by a gas gage IC. They generate pulses proportional to the current versus time of the charge. Use it with a processor and you can make decisions about battery life.

Hughston
User Rank
Author
re: Implementing battery charger using Li-ion
Hughston   7/9/2012 4:00:28 PM
NO RATINGS
Sometimes a regulator with a current limiting resistor on the input side is used as a cheap coin cell charger. The precharge time is very short, under a minute, on a Li-Ion battery. I think if the resistor was on the output side, it would be hard to top off the battery. You can use a simple 2 transistor circuit to up the current when the cell voltage goes up.

WKetel
User Rank
Author
re: Implementing battery charger using Li-ion
WKetel   7/4/2012 5:12:02 PM
NO RATINGS
Now a question about simplification of the process: would a current limited constant voltage charge work as well? It would not be as fast, it may take overnight to recharge completely, but it would certainly be simpler. Most importantly, would it damage the cells to start out with a current limited constant voltage charge? Or is it a situation that must have the higher voltage at the beginning?

MarkeSys
User Rank
Author
re: Implementing battery charger using Li-ion
MarkeSys   6/28/2012 7:11:34 PM
NO RATINGS
Another possibility for being able to use a single-ended ADC in this system would be to simply put a small-value resistor in series with the negative terminal of the battery pack, before its ground connection. This way the microcontroller system and the power supply can share the same ground. There is a small efficiency cost, but this can be mitigated by using a very small-value resistor, (for example, a 0.1 ohm resistor at 100mA would drop 10mV, at a power cost of only 1 mW).

Sanjib.A
User Rank
Author
re: Implementing battery charger using Li-ion
Sanjib.A   6/26/2012 4:37:17 PM
NO RATINGS
Unless a sophisticated charging circuit is needed, using a PSoC would be an overkill. In general standard charging ICs will need a lot less design efforts. But some time, the user might need to know the health life of the battery, how many charging cycles took place etc. In that case this will be helpful.

GREATTerry
User Rank
Author
re: Implementing battery charger using Li-ion
GREATTerry   6/26/2012 3:58:46 PM
NO RATINGS
Good article!



Datasheets.com Parts Search

185 million searchable parts
(please enter a part number or hit search to begin)
Radio
NEXT UPCOMING BROADCAST

What are the engineering and design challenges in creating successful IoT devices? These devices are usually small, resource-constrained electronics designed to sense, collect, send, and/or interpret data. Some of the devices need to be smart enough to act upon data in real time, 24/7. Are the design challenges the same as with embedded systems, but with a little developer- and IT-skills added in? What do engineers need to know? Rick Merritt talks with two experts about the tools and best options for designing IoT devices in 2016. Specifically the guests will discuss sensors, security, and lessons from IoT deployments.
Like Us on Facebook
Special Video Section
LED lighting is an important feature in today’s and future ...
05:27
The LT8602 has two high voltage buck regulators with an ...
05:18
The quality and reliability of Mill-Max's two-piece ...
01:34
Why the multicopter? It has every thing in it. 58 of ...
Security is important in all parts of the IoT chain, ...
Infineon explains their philosophy and why the multicopter ...
The LTC4282 Hot SwapTM controller allows a board to be ...
This video highlights the Zynq® UltraScale+™ MPSoC, and sho...
Homeowners may soon be able to store the energy generated ...
The LTC®6363 is a low power, low noise, fully differential ...
See the Virtex® UltraScale+™ FPGA with 32.75G backplane ...
Vincent Ching, applications engineer at Avago Technologies, ...
The LT®6375 is a unity-gain difference amplifier which ...
The LTC®4015 is a complete synchronous buck controller/ ...
10:35
The LTC®2983 measures a wide variety of temperature sensors ...
The LTC®3886 is a dual PolyPhase DC/DC synchronous ...
The LTC®2348-18 is an 18-bit, low noise 8-channel ...
The LT®3042 is a high performance low dropout linear ...