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leomecma
Joined: 17 Jun 2005
Posts: 241
Helped: 13
Location: Brasil
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 20 Jun 2007 18:50 Li-ion battery charger |
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People, the termination method for li-ion batteries is the minimal current, right?
How I can use this with load across the battery? My load isn't constant, and sometimes has high current sink.
Anyone know how cellular does?
leomecma
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bobcat1
Joined: 10 Jul 2002
Posts: 1118
Helped: 48
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23 Jun 2007 15:05 Re: Li-ion battery charger |
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Hi
You have to isolate the battary charging path from the main power path in order to charg the battery with out error
there are some cherger (from the current generation) who can do that internally for other chrger you have to use automatic switch like the LTC4412 from linear
All the best
BObi
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A.Anand Srinivasan
Joined: 15 Oct 2005
Posts: 1792
Helped: 216
Location: India
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23 Jun 2007 15:12 Re: Li-ion battery charger |
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| i think a current limiting circuit just as used in regulators at the connection between the battery and the load would work fine....
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vaibhav.k
Joined: 12 Apr 2006
Posts: 117
Helped: 6
Location: India
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28 Jun 2007 6:19 Li-ion battery charger |
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| I think BQ2000 from texas provide solution for problem it provides charging with load connected
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ultrabrains
Joined: 14 Feb 2007
Posts: 115
Helped: 8
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28 Jun 2007 12:56 Re: Li-ion battery charger |
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Check This Link below
http://pdfserv.maxim-ic.com/en/an/AN680.pdf
This is an IC used for charging Li-ion battery, if you need any othe information feel free to contact me
cheers.
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Google
AdSense
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28 Jun 2007 12:56 Ads |
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frbilgrami
Joined: 05 Jul 2007
Posts: 3
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05 Jul 2007 12:11 Re: Li-ion battery charger |
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Send Your Battery specifications
Max Battery Voltage
Max Charge Current
Max Charge Voltages
or Battery Model Number
Then i will suggest you what to do?
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shoaibali
Joined: 28 Jun 2007
Posts: 40
Helped: 3
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05 Jul 2007 13:24 Re: Li-ion battery charger |
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You can use current monitoring IC for your battery current monitoring
like ZXCT1010
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megafit
Joined: 22 Sep 2006
Posts: 5
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07 Dec 2007 4:33 Re: Li-ion battery charger |
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Hope this will be helpful!
Battery Charger Termination Issues With System Load Applied Across Battery While Charging
which can be access from TI's website.
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faraz101
Joined: 07 Mar 2007
Posts: 97
Helped: 2
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14 Dec 2007 6:10 Li-ion battery charger |
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i m using my homebuild charger for li ion.
it is constant current charger with lm317.
and an op amp for voltage sensing for autooff the charger when the cell charges upto 4.2v.
thanx
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