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VincentNacon t1_iuepe0m wrote

Reply to comment by MadLintElf in Fires from exploding e-bike batteries multiply in NYC — sometimes fatally by zsreport

Yeah, I've been saying this over and over again... They really need to spread out the battery cells inside the battery pack, so it could vent heat and cool down better. A bike has a lot of spaces to spread them out.

For an example, could be inside the long tube inside the bike's frame, all the way from rear to front, top to bottom.

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Afro_Thunder69 t1_iuet9fh wrote

How would you charge the battery if it's built into the frame? Bringing your bike up an apartment building isn't always feasible but bringing a removable battery is

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Bsomin t1_iuetiri wrote

they have structural/integral batteries that form part of the frame but are also removable

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apimpnamedmidnight t1_iueu567 wrote

I was about to say that was a bad idea, but I bet it would be fine on a commuter bike. They shouldn't see anything more crazy than a drop off the curb or a pothole

I pity the poor soul that tries to take it off even a small ramp, though

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VincentNacon t1_iuexkkw wrote

It doesn't have to be like that. It's possible to spread out the weight and yet keep the Center of Mass in the same spot.

If anything, it would make it easier to carry/lift compared to having it all in one spot.

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bigfatmatt01 t1_iuf4zh8 wrote

Yeah and don't bike riders tend to take part of the bike with them anyway if they park it outside, like the handlebars or a detachable front wheel?

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rex30303 t1_iuf7eye wrote

At most what i have seen is the seat if it is tightended with a quick release.

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bigfatmatt01 t1_iufeaeb wrote

I may be remembering the movie quicksilver with Kevin Bacon

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WhenAmI t1_iug9gui wrote

Quick release front tires are very common on decent bikes.

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rex30303 t1_iugxufa wrote

Yes but people dont take them with them.

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Shiftlock0 t1_iufacfr wrote

Sounds complicated compared to a simple snap-on battery. I wonder how much this would add to the cost of the average bike?

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VincentNacon t1_iuexvqx wrote

Yeah, it'd have to be charged right on the spot.

But then, it's possible to open the end of the tube and pull the battery out. There are some flexibility in the designs process.

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MadLintElf t1_iuf1lzo wrote

Ever watch Jerry Rig Everything on Youtube, Zack does a teardown of a Rivian truck's battery pack. All compartmentalized, big honking blocks of batteries with cooling components.

It's a lot more doable than you think.

As for putting them in the frame, it sounds good but would still have to reside in the lower portion to keep the center of gravity proper.

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ELONGATEDSNAIL t1_iufd8us wrote

When batteries fail its typically not due to over heating but rather a loose piece of metal contacting the wrong terminal, or water damage. Having them spread out might help these issues but then you need much more wiring to connect all these batteries. Plus how would you remove them from inside the frame once they need to be replaced?

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