Post AssAsJH73VLWfZySOG by rayhindle@mastodon.social
(DIR) More posts by rayhindle@mastodon.social
(DIR) Post #AsrnamJk2Xi2aJsJPc by futurebird@sauropods.win
2025-04-08T02:11:32Z
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I'm trying to learn about batteries because my husband who thinks I know everything about electronics for some reason (I do not) keeps asking me questions about his motorcycle battery. One of the reasons no one understands batteries is because it's actually kind of hard to know how many electrons are stored in a battery ready to be discharged. I keep trying to explain this to him.Now he wants to know what a "Cold Cranking Amp" is. I'm going to CRY. What is a "Cranking Amp"
(DIR) Post #AsrncEasOWtMZWaGcC by futurebird@sauropods.win
2025-04-08T02:11:46Z
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These battery people are just making stuff up as they go.
(DIR) Post #Asrnrm6O5tIOq7jWvg by JessTheUnstill@infosec.exchange
2025-04-08T02:14:35Z
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@futurebird It's what you get when chemists have come up with some really cool shit, then engineers built it, but you needed to give the mechanics something they could wrap their heads around. Kinda like how we still have horsepower - a random unit of power based on some random horse. Or feet based on some old king's foot. Our measurements are awful.
(DIR) Post #Asro3kGIlG6qbk4vOi by marshray@infosec.exchange
2025-04-08T02:16:44Z
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@futurebird It’s the unit of current the battery can deliver to a low-resistance load (i.e., a starter motor) typically for 30 s max.
(DIR) Post #Asro4jyjIgtQ1CKlcG by gneilyo@mastodon.online
2025-04-08T02:16:49Z
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@futurebird Is there a problem with his motorcycle’s battery or electric sysyem?
(DIR) Post #AsroEhRnZ9kv41gC5Q by futurebird@sauropods.win
2025-04-08T02:18:45Z
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@JessTheUnstill You see I thought it was something like that. Apparently these are based on tests that you can do on a battery so you can compare how well one battery will do starting a motor to another. But manufacturers give this absurd high numbers "660 Cranking Amps" More than 5 Amps is "too many Amps" in most contexts that I know. So I'm very confused. But, it's just based on some test?
(DIR) Post #AsrodSeHiwoWPGKLA0 by futurebird@sauropods.win
2025-04-08T02:23:13Z
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@valdelane Sometimes you just have cold cranky amps instead.
(DIR) Post #AsrofacP41jzheShYO by hattifattener@wandering.shop
2025-04-08T02:23:33Z
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@futurebird if it's a motorcycle battery it's probably a "cold kickstarting amp" anyway.
(DIR) Post #AsrpLjTYWUGLKtQ22S by utopiarte@tupambae.org
2025-04-08T02:26:28Z
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@futurebirdhttps://batteryuniversity.com/is your friend ..
(DIR) Post #AsrqRhdsLwP1LCemAq by futurebird@sauropods.win
2025-04-08T02:43:30Z
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@Affekt @JessTheUnstill I guess I need to read about spark plugs too now. GREAT. Technically that's "learning about cars" which is something I have avoided all my life. But nerd sniping husband knows how this goes. It's so unfair.
(DIR) Post #AsrqSnwKQLZFA7oTNQ by SKleefeld@mastodon.social
2025-04-08T02:43:32Z
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@futurebird Just start answering every out-of-left-field, this-is-not-my-area-of-expertise question with, "This one goes to eleven."
(DIR) Post #AsrtczCVi6YMqVvdkO by moira@mastodon.murkworks.net
2025-04-08T03:19:04Z
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@futurebird @Affekt @JessTheUnstill If it's any consolation, spark plugs are used in things other than cars. Mostly wherever there's a conventional (non-diesel) internal combustion engine - petrol, natural gas, propane, all those engines use spark plugs.
(DIR) Post #AsrxuD9DVceiqCrCc4 by msbellows@c.im
2025-04-08T04:07:03Z
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@futurebird Imagine an old old car with a hand-crank starter. Cold Cranking Amps = how strong your bicep is when you need to go outside and start the car immediately after rolling out of bed.
(DIR) Post #Ass0KlVcZog0qf7tQ0 by efhastings@twit.social
2025-04-08T04:34:16Z
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@futurebird this is at the intersection of automotive, chemical and electrical technologies, so making sense requires a bit of knowledge about each. But specifically, see https://www.batteriesplus.com/blog/power/cold-cranking-amps
(DIR) Post #Ass0XRVSG1ZSZl5rHc by Unixbigot@aus.social
2025-04-08T04:36:33Z
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@futurebird CCA measures how many amps the battery can supply to the starter motor when the engine is cold and thus hardest to start. Starting batteries are optimized to prove huge power for brief moments (as opposed to say deep cycle batteries which are optimized for capacity over extended discharge and recharge cycles)
(DIR) Post #AssAsJH73VLWfZySOG by rayhindle@mastodon.social
2025-04-08T06:32:24Z
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@futurebird This may help, or possibly not!https://www.batteriesplus.com/blog/power/cold-cranking-amps
(DIR) Post #AssBfO5Hxmz9m6qTw0 by glasspusher@beige.party
2025-04-08T06:41:14Z
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@futurebird if you have deeper questions about electrochemistry, let me know
(DIR) Post #AssBioRyON66Pr5aj2 by glasspusher@beige.party
2025-04-08T06:41:53Z
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@futurebird psst: there are no “solid state” batteries 😉
(DIR) Post #AssEEosIY55WuLnBZI by nazgul@infosec.exchange
2025-04-08T07:10:04Z
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@futurebird It was a very important number growing up in Maine winters. You'd have an old battery that worked perfectly fine until you discovered it could t start the car when it was cold. Brings back (cold) memories,
(DIR) Post #AssMc2H9gpIglQ052m by llewelly@sauropods.win
2025-04-08T08:43:56Z
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@futurebird when I was ten (knowing nothing about cars) "cold-cranking amps" made me imagine a strange "test rig" contraption involving a box of ice to immerse a battery in, a weighted crank, and a motor the battery was connected to. Battery turned crank, and marks on the crank showed how many "cold cranking amps". I put it in a short story for my fifth grade teacher, and she made me take it out for the second draft. I have never since learned anything about "cold-cranking amps".
(DIR) Post #AssXY1TznL26dsINTk by alec@perkins.pub
2025-04-08T10:31:07Z
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@Affekt @futurebird @JessTheUnstill yeah a car battery is 12V nominal so even though it can produce 660 amps that’s ‘only’ 7920W, which is a reasonable amount of power to run a starter motor for a car engine. An electric oven or dryer usually draws 4kW or more, but for a lot longer than 30 seconds by flipping the volts and amps magnitudes.
(DIR) Post #Assc0oy9nYvQ2xOHXE by AMS@infosec.exchange
2025-04-08T11:36:29Z
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@futurebird There's a test standard. Essentially it's a measure of internal resistance expressed as the current it can feed a bolted short. Cold because chemistry (and thus open circuit voltage and electrochemical resistance) varies with temperature. Cranking because a starter motor looks quite like a bolted short.
(DIR) Post #AsscPZq5BnXKMQQ0Yq by vxo@digipres.club
2025-04-08T11:40:57Z
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@futurebird One of the things that really complicates this is that the lead-acid battery SUCKS. The amount of energy you can extract from it is proportional to the rate, modeled by Peukert's Law. This does not hold true for any other common battery chemistry.The lead plates are spongy in consistency, and there's a "surface charge" effect in action as well, and..... i'm already thinking of changing my bike battery out to lithium iron phosphate
(DIR) Post #AsspN9SJbrsxMKTWXg by owen@mastodon.transneptune.net
2025-04-08T02:46:52Z
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@futurebird @Affekt @JessTheUnstill That horrible feeling of seeing a potential interest trap looming and trying real hard not to think about it in case you fall inTell your husband he's being a meaniepants :D
(DIR) Post #Asty7UDVkIkzrS7EVU by guyjantic@infosec.exchange
2025-04-09T03:18:54Z
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@futurebird in the old days, you didn't have the Peavey or Marshall or Crate or whatever. You plugged your guitar into a contraption driven by gasoline and pistons. Of course it didn't start by itself. You had this s-shapes bar you inserted and cranked until the Amplifying Engine was warm enough to run. The number of rotations it took to start that cold engine... Well, you get where I'm going with this