Re: EBC-B20H 20A 12-72V Lithium Battery capacity tester just bought one
now those are big inductive resistors...
now those are big inductive resistors...
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Re: EBC-B20H 20A 12-72V Lithium Battery capacity tester just bought one
people are using ESR meters, isn't this a better way to test batteries?Comment
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Re: EBC-B20H 20A 12-72V Lithium Battery capacity tester just bought one
ESR meters will measure specific power, but won't specific energy.Comment
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Re: EBC-B20H 20A 12-72V Lithium Battery capacity tester just bought one
I have read this as well but I do not know how to interpret the results of what the ESR value would mean for battery cell health that you could rely on
I have tried this but I have had mixed results so I do not use this for an evaluation methodLast edited by sam_sam_sam; 12-20-2021, 04:00 PM.Comment
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Re: EBC-B20H 20A 12-72V Lithium Battery capacity tester just bought one
ESR just needs to match the manufacturer's specifications, comparing numbers across chemistries and sizes doesn't make much sense - a value acceptable for alkaline cells can be horrible for NiMH and Li-ion but too good for lithium thionyl chloride.
An apparatus such as this is still needed to measure capacity.Comment
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Re: EBC-B20H 20A 12-72V Lithium Battery capacity tester just bought one
Depends on the manufacturer, they should list it, if they aren't then they're not doing a good job describing their product. This data is related to the max current draw and thus power.
Haven't checked out Li-ion cell datasheets in a while but I definitely see it for lead acid batteries.Comment
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Re: EBC-B20H 20A 12-72V Lithium Battery capacity tester just bought one
Well I have had some time to play with this battery testing machine on a battery pack and the software on the computer and it has been interesting with the results of this battery pack
Well my computer decided to lock the screen and I had restart the the software again and lost the results which I do not understand because it has been turned off to not lock the screen however it does it anyway sometimes by it selfLast edited by sam_sam_sam; 12-25-2021, 12:33 AM.Comment
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Re: EBC-B20H 20A 12-72V Lithium Battery capacity tester just bought one
Here are the results after more than two hours into the testingAttached FilesComment
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Re: EBC-B20H 20A 12-72V Lithium Battery capacity tester just bought one
Here it is after more than 4 hours of testingAttached FilesComment
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Re: EBC-B20H 20A 12-72V Lithium Battery capacity tester just bought one
The end results are that it tested at 7200 milliamperes hours and I do not think that cycling it more will not help because it has tested this way several times before and the results are basically the sameComment
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Re: EBC-B20H 20A 12-72V Lithium Battery capacity tester just bought one
The conclusion of this battery testing machine is that it is useful for battery packs that are over 24 volts and for battery packs that you want to put more than a 2 amp load on them but it has it limitations one being that you have to have a external switching power supply for charging and your battery voltage has to be above 9 volts to able to use it
It voltage range is from 12 volts to 72 volts which works for me very well I have found a 60 volt switching power supply for this battery tester that I going to buy for it
One more note you do have to modify the fans if you can not stand for the fans to be at full speed all the time when in useLast edited by sam_sam_sam; 12-26-2021, 05:55 AM.Comment
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The ISL88739 & ISL88739AHRZ are a highly versatile combo battery charger
configurable for operating as either a Hybrid Power Boost (HPB)
charger or a Narrow VDC (NVDC) charger, supporting 2-, 3-, or
4-cell batteries. Both configurations allow the battery to work with
the adapter together to supply the system load when it exceeds
the adapter capability, referred to as system Turbo mode. HPB
charger configuration reverse-boosts battery energy to the system
bus to help the adapter provide the system power in Turbo mode.
NVDC charger configuration...11-05-2024, 03:28 PM -
Hello guys, i need help with this problem, I have a NM-D041 mobo, it came with low impedance in 3v linear regulator rail, the cause was a damaged EC controller ITE8227e-192. I ordered a new one and replaced it. This laptop have a different chip for keyboard management and it8227e pins for programming ITE chips are not accesible through keyboard interface, I flashed it using i2c interface pins with vertyanov programmer because laptop was dead and SPI flash didn't have power (only 3v EC) so it couldn't access firmware stored in SPI memory. I read SPI and extracted it8227 firmware from original BIOS... -
This is another battery testing machine that needs to be modified for the cooling fans because these are noisy but not as bad as one of the other battery testing machines that I had modified recently because of it being too noisy
The battery testing machine is going to get two temperatures controlled cooling fans like one I put in the other battery testing machine I just have to remove the temperature sensor and relocate the temperature sensor to one of the heat sinks and put one on the other heat sink so the fan speed can be controlled by temperature
https://www.eb... -
This iPad was working fine except the battery was not holding charge for more than 40 minutes. I replaced it with a new battery. I haven't glued the battery yet, just inserted it into the slot and held it with battery screw.
The iPad was powered on with the new battery and I am getting white screen with Apple logo for about 10 seconds, then the screen turns dark. It then cycles like this forever.
I know the battery is working because the iPad continues to boot loop without the charger until it depletes to 0% and the message displays I need to plug in the charger.
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ISL6257HRZ ISL6257HRZ-T Laptop Battery Charger Datasheet
Highly Integrated Narrow VDC Battery Charger for Notebook Computers
The ISL6257HRZ ISL6257HRZ-T is a highly integrated battery charger controller
for Li-Ion/Li-Ion polymer batteries. ISL6257 is designed for
Narrow VDC applications where the system power source is
either the battery pack or the regulated output of the charger.
This makes the max voltage to the system equal to the max
battery voltage instead of the max adapter voltage. Operating
at lower system voltage can improve...11-05-2024, 04:43 PM
Comment