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can you revive a e bike battery by shorting battery briefly?

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can you revive a e bike battery by shorting battery briefly?

Old 08-29-17, 11:04 AM
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can you revive a e bike battery by shorting battery briefly?

by briefly shorting battery contacts will it revive a weak battery?
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Old 08-29-17, 11:24 AM
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it would depend on the battery; if it's lithium ion, no. If it's lead acid, you can try using a battery desulphator, but shorting the battery contacts manually won't do anything to my knowledge.
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Old 08-30-17, 12:12 PM
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This looks more like a troll question.

But if its is real, DONT DO IT. Then give some real details.

-SP
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Old 08-30-17, 02:03 PM
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Originally Posted by Tcalp
it would depend on the battery; if it's lithium ion, no. If it's lead acid, you can try using a battery desulphator, but shorting the battery contacts manually won't do anything to my knowledge.
Well, with an optima yellow top (circa 2005ish) that would result in turning the spanner (wrench) into plasma.

Hard to imagine anything GOOD to ever come out of intentionally shorting a battery. If it has real high draw support, plasma....if it has a good internal BMS, you might well destroy the BMS (but save yourself from an explosion).
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Old 08-30-17, 02:28 PM
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Do you mean jumping? No, send it through it's normal and correct charging cycle.


And exploding batteries are your instant call to the life insurance agent. All you newbies, please, you can peddle it.
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Old 08-30-17, 05:41 PM
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to expand on my earlier comment, when I said "won't do anything", I meant won't do anything towards reviving the battery
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Old 08-31-17, 06:09 AM
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"shocking" a battery works for certain chemistries. I know people do it for nmih. Shocking requires a higher voltage. The mechanism is to put a high current through shorted cells. I think the only way to fix a lithium pack is to replace the bad cells. People take multiple packs apart and reassemble with only good cells. Plenty of people looking at this, I would do a search.
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Old 08-31-17, 08:16 AM
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With certain car/marine batteries, especially deep cycle ones, they refuse to charge if they get low enough. The reason can be the charger sees them as stone dead and refuses to charge. The trick is to hook them in parallel to a good normal battery, and then charge them together.


Also, for car batteries, expensive "intelligent" chargers can sometimes charge a battery that other chargers can't. In addition, a sophisticated digital battery tester can quickly tell if a car battery is scrap or not, and save you a lot of effort; I don't know if such a digital load tester exists for e-Bikes, but if it does not, someone really should produce one.
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Old 09-02-17, 04:11 AM
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Originally Posted by kesommers
by briefly shorting battery contacts will it revive a weak battery?

Throw it in the recyclers bin. To most people batteries are expensive mysterious sealed boxes and they look at them, thinking about how much they cost, and imagine that with a little tinkering they can bring them back to a useful state. The only time I have ever had success with this is in bringing back Lipo's that have fallen below the minimum voltage allowed by their internal circuits (if fitted) You have to know what you're doing, you can't exceed the maximum voltage for the pack and type of Lithium, but I have been very successful in this with laptop batteries.
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Old 06-08-20, 01:08 PM
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Originally Posted by coominya
Throw it in the recyclers bin. To most people batteries are expensive mysterious sealed boxes and they look at them, thinking about how much they cost, and imagine that with a little tinkering they can bring them back to a useful state. The only time I have ever had success with this is in bringing back Lipo's that have fallen below the minimum voltage allowed by their internal circuits (if fitted) You have to know what you're doing, you can't exceed the maximum voltage for the pack and type of Lithium, but I have been very successful in this with laptop batteries.
thanks for the info provided, it helped me
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Old 06-08-20, 03:45 PM
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That's scary to a guy who has been out of battery and electrical theory for quite a few years. I'm having to relearn almost all of it. Be safe and Be Well, Bluesfrog.
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