Electronics-Related.com

OT: Do electric cars let you monitor INDIVIDUAL battery temperature?

Started by John Doe in sci.electronics.design2 years ago 30 replies

Seems to me that is an important question, no matter what alleged device protection there is. I would want to know what the highest...

Seems to me that is an important question, no matter what alleged device protection there is. I would want to know what the highest INDIVIDUAL battery temperature is. I would want an alarm when any battery reaches X degrees. Doesn't matter how many batteries there are. The more batteries, the more important for the driver to know what's going on. I suppose they do not keep track of...


lithium fires

Started by John Larkin in sci.electronics.design1 year ago 32 replies

Today's NYT describes a nasty fire in an apartment building in Manhattan, started by a bicycle battery. There have been 200 battery-ignited...

Today's NYT describes a nasty fire in an apartment building in Manhattan, started by a bicycle battery. There have been 200 battery-ignited fires in Manhattan so far this year, with six deaths. Unless battery quality improves somehow, buildings will need fireproof vaults for parking bikes and scooters. I see lots of electric scooters and bikes on the streets of San Francisco lately. Some ...


replacing a battery

Started by RichD in sci.electronics.design2 years ago 10 replies

The battery in my phone burned out, so I ordered a replacement from Amazon. Examining the case, I can't find any fasteners. Do I open it...

The battery in my phone burned out, so I ordered a replacement from Amazon. Examining the case, I can't find any fasteners. Do I open it with an oyster knife? -- Rich


Anything's possible

Started by Commander Kinsey in sci.electronics.design8 months ago 1 reply

Old phone, battery expanded to triple thickness, looked like an imminent explosion, using it as a quad core CPU only, so let's use a AAA...

Old phone, battery expanded to triple thickness, looked like an imminent explosion, using it as a quad core CPU only, so let's use a AAA battery. https://i.imgur.com/F7uPMRv.jpg


Bob Parker's Blue ESR Meter - query

Started by Charlie+ in sci.electronics.design7 months ago 4 replies

Apart from capacitor ESR checking, I use this meter for checking and tracking battery ESRs. Can anyone give me a safe upper voltage...

Apart from capacitor ESR checking, I use this meter for checking and tracking battery ESRs. Can anyone give me a safe upper voltage level opinion for not damaging the meter in this use? I have used it to check 2S Li-ion but could you get away with a 10S (42V) battery or 48V e-bike battery for example? The meter is too useful to damage! Or perhaps a standard capacitor in series would be a ...


GM Sprints Past Tesla With Big EV Battery Plans & Green H2

Started by Fred Bloggs in sci.electronics.design1 year ago 14 replies

Critics of Tesla have long warned that investors should brace themselves for competition from other EV makers, and GM is a case in point. GM has...

Critics of Tesla have long warned that investors should brace themselves for competition from other EV makers, and GM is a case in point. GM has just dialed its EV battery supply chain up to 11, and the company is also building on its decades-long experience with fuel cells to dip into the green hydrogen trend. The big EV battery news from GM is a $2.5 billion loan, announced by the


New design for lithium-air battery could offer much longer driving range compared with the lithium-ion battery

Started by Jan Panteltje in sci.electronics.design1 year ago 8 replies

New design for lithium-air battery could offer much longer driving range compared with the lithium-ion battery ...

New design for lithium-air battery could offer much longer driving range compared with the lithium-ion battery https://www.sciencedaily.com/releases/2023/02/230222210559.htm


Charging time for Ultrafire 18650 6800 mAh battery

Started by Andy in sci.electronics.design5 years ago 44 replies

I would like to find out how long to charge the above battery. Charger puts out 500 mAh. Thanks.

I would like to find out how long to charge the above battery. Charger puts out 500 mAh. Thanks.


RTC and cr2032 low voltage

Started by captoro in sci.electronics.design12 years ago 2 replies

Hi, I am using the RTC DS1337 with a CR2032 battery. I know that when these battery shows 2.7v, it needs replacing, Although the RTC can...

Hi, I am using the RTC DS1337 with a CR2032 battery. I know that when these battery shows 2.7v, it needs replacing, Although the RTC can go down to 1.4V from the spec sheet. I even powered it through my power supply at 1.1V and it was keeping time correctly. I am only power the RTC from the battery. My question is : How low of a voltage can I go before replacing in a real life situation ? ...


Battery problems

Started by Don Y in sci.electronics.design2 years ago 29 replies

Does anyone *know* what cause(s) of recent/historical battery fires (in EVs, particularly)? I assume it is not related to abuse or "usage...

Does anyone *know* what cause(s) of recent/historical battery fires (in EVs, particularly)? I assume it is not related to abuse or "usage hazards". Or, charging/BMS. But, rather, originates in manufacturing (?) Is this an issue with material (im)purities, mechanical defects, assembly faults, etc.?


Filter Cap for a battery pack ?

Started by Sid 03 in sci.electronics.design2 years ago 5 replies

I need to select a capacitor for a battery pack. I see a lot of circuits that use Alkaline batteries and then have a ceramic capacitor across the...

I need to select a capacitor for a battery pack. I see a lot of circuits that use Alkaline batteries and then have a ceramic capacitor across the leads of the series battery pack to act as a filter. My question is how do you size the cap ? I hate just looking at what someone else has done and just guess or copy. I have 4x 1.5v alkaline batteries in series powering a amplifier circuit. ...


PNP for soft switch and reverse battery protection

Started by Peabody in sci.electronics.design7 years ago 66 replies

I'm working on a small circuit that will be powered by a 9V battery. I would like to combine the functions of a soft power switch and reverse...

I'm working on a small circuit that will be powered by a 9V battery. I would like to combine the functions of a soft power switch and reverse battery protection in a single device. I think the answer may be to use a PNP transistor on the high side, with a base resistor to ground - actually to ground through a physical momentary switch, or indirectly to ground via an NPN transistor cont...


car emergency start battery

Started by Ralph Mowery in sci.electronics.design9 months ago 13 replies

I bought 2 car emergency start battery packs from Amazon. One has about 15.5 volts on the open circuit battery cables. It also has one USB...

I bought 2 car emergency start battery packs from Amazon. One has about 15.5 volts on the open circuit battery cables. It also has one USB port that is labled for 5 volts and 9 volts. Another port labled 12 Volta 10 amps. That port puts out about 15.5 volts open circuit. The other pack has 11.7 volts at the battery cable, then a USB port labled 5 v, 9v, 12 V with lower amps for th...


battery charger

Started by RichD in sci.electronics.design3 years ago 5 replies

I picked up a AAA NiMh battery charger. The label reads: Output: 1.2 V 800 mA AA/AAA charging: 120 mA Why the two different current...

I picked up a AAA NiMh battery charger. The label reads: Output: 1.2 V 800 mA AA/AAA charging: 120 mA Why the two different current specs? Does not compute - -- Rich


EV owners are getting a BIG shock as their vehicles go out of warranty

Started by Flyguy in sci.electronics.design1 year ago 29 replies

Tesla owners are finding out that Tesla doesn't repair damaged battery packs - they replace the ENTIRE battery at a cost of up to $22k which is...

Tesla owners are finding out that Tesla doesn't repair damaged battery packs - they replace the ENTIRE battery at a cost of up to $22k which is almost the value of the car (https://electrek.co/2021/09/13/tesla-battery-pack-replacement-repair/). One Tesla owner had a $2 part get damaged by road debris and Tesla quoted him $16,000 to replace the entire pack, so he had it towed to a sh


NiCd cell replacements

Started by Andy K in sci.electronics.design10 years ago 14 replies

I will be replacing eight cells in a battery for a cordless drill. 9.6 V The markings did not lead anywhere. DF21NF NiCd Since there are...

I will be replacing eight cells in a battery for a cordless drill. 9.6 V The markings did not lead anywhere. DF21NF NiCd Since there are eight cells in the battery, I think they are 1.2 volt nicads. 1 3/4 X 5/8 are the dimensions if that would help with determining the mAH. Could someone help me in what would be a good replacement ? Thanks.


Hackaday !! Battery Engineering Hack Chat by: Dan Maloney December 12, 2022 Join us on Wednesday, December 14 at noon Pacific for the Battery Engineering Hack Chat with Dave Sopchak!

Started by a a in sci.electronics.design1 year ago 1 reply

Battery Engineering Hack Chat No comments by: Dan Maloney December 12, 2022 Join us on Wednesday, December 14 at noon Pacific for...

Battery Engineering Hack Chat No comments by: Dan Maloney December 12, 2022 Join us on Wednesday, December 14 at noon Pacific for the Battery Engineering Hack Chat with Dave Sopchak! Of all the things driving technology forward, you’d have to say that the ability of chip makers to squeeze more complex circuits than ever onto silicon has to rank right up there.


Charger recommendations

Started by Andy in sci.electronics.design6 years ago 17 replies

I am looking at the Nitecore D4 Digicharger/Four Channel Universal Smart Battery Charger/LCD Display and GYRFALCON All-44 4 Channel Digital...

I am looking at the Nitecore D4 Digicharger/Four Channel Universal Smart Battery Charger/LCD Display and GYRFALCON All-44 4 Channel Digital Battery Charger. What do you recommend ? I read where 26650 have a higher capacity than 18650s. Andy


Toyota Solid State Battery

Started by Dean Hoffman in sci.electronics.design9 months ago 9 replies

It supposedly will give a vehicle 900 mile range someday. No details.

It supposedly will give a vehicle 900 mile range someday. No details.


HP3586 Selective Voltmeter Help

Started by amdx in sci.electronics.design6 years ago 1 reply

I bought an HP3596B off Ebay. I have a service manual on order. First thing I did was remove the leaky battery and thoroughly clean the PS...

I bought an HP3596B off Ebay. I have a service manual on order. First thing I did was remove the leaky battery and thoroughly clean the PS board. It looks good, however if I look down to the edge connector inside the unit I can see it has the blue buildup on it from the battery leak. I'll save that until I disassemble to clean and lube the switches. At power up the self calibrati...