• There has been a recent cluster of spammers accessing BARFer accounts and posting spam. To safeguard your account, please consider changing your password. It would be even better to take the additional step of enabling 2 Factor Authentication (2FA) on your BARF account. Read more here.

Battery Concave: Is this bad?

Doesn't matter, still volatile if badly overcharged.

Some of the vintage wrecks we're talking about, I wouldn't trust with a traditional flooded cell, much less something nice :p

(Sorry Ritch)

:later
 
they'll still die and rupture, but they aren't going to explode like a LiPo will. one of the guys on the R1 board did it when his stator/RR something took a dump.
 
Marlowe said:
I'm not entirely sure I want a LiPo pack sitting on a 1950s scooter with a very badly regulated charging system.

:laughing
Click to expand...

Wait, they have charging systems? :laughing I thought it was like their oil and air in the tubes, total loss systems - encourages maintenance. 'When the puddle is this big,' it's time to add oil.

The battery in question is currently losing .1V/day after being charged. It will be just fine to keep around for this and that and to help me keep track of a solar charger, so I can find it when I need it.

The battery in question was in my second most technologically advanced bike.....
 
stav2201 said:
Ok so here is the scientific explanation.

- you have millions of electrons in this battery which are bouncing around inside this case (causing heat and slightly expanding). When your charge dissipates their are less electrons and no force to keep the battery walls pushed out. When you have a low charged battery and apply coldness to it the electrons move slower and reduce power. This is like putting ice on a bump, it makes the swelling go down, and in this case making the walls of your battery bend inwards. Go read your owners manual that your bike comes with, it explains this as well. This can also occur even with a new battery, it has to do with the charging and discharging mostly.

Anyone who said i was wrong can eat a dick too.
Click to expand...
the science sounds a little fishy to me. do you have a link for where it came from? the reason i find it odd is that everything in the planet is made up of protons, neutrons & electrons & not everything "swells up" i mean a glass pint glass is made up of electrons & it doesn't change shape. also why would only the negatively charged electrons be used up when the battery is discharged? what happens to the positively charged protons? why would only the negative stuff be depleted when the battery puts out positively charged DC current?
 
elskipador said:
the science sounds a little fishy to me. do you have a link for where it came from? the reason i find it odd is that everything in the planet is made up of protons, neutrons & electrons & not everything "swells up" i mean a glass pint glass is made up of electrons & it doesn't change shape. also why would only the negatively charged electrons be used up when the battery is discharged? what happens to the positively charged protons? why would only the negative stuff be depleted when the battery puts out positively charged DC current?
Click to expand...

owned.gif
 
does the battery still have the vent cap on. Has the battery cycles through being charged and discharged billets banned in contract. You have stretch in the event could cause this
 
elskipador said:
the science sounds a little fishy to me. do you have a link for where it came from? the reason i find it odd is that everything in the planet is made up of protons, neutrons & electrons & not everything "swells up" i mean a glass pint glass is made up of electrons & it doesn't change shape. also why would only the negatively charged electrons be used up when the battery is discharged? what happens to the positively charged protons? why would only the negative stuff be depleted when the battery puts out positively charged DC current?
Click to expand...

Yes, but, when that pint glass gets cold it becomes more brittle and shrinks. Ever had 2 glass cups stuck together when they were stacked on eachother? Put em in the freezer and the molecules stick together tighter making the glass smaller so you can take them apart easier. Its all the heating and cooling of battery, less charge means less heat being created. When you apply heat to cold (Battery being warm from charged after riding the bike) then apply coldness to it, the molecules will re-align and suck in the walls of the battery if you will.

And to answer the question of the battery being bad...
-If the case is cracked its bad
-If it is incapable of holding a proper charge its bad
-If it works fine and charges good, then its good!
 
Last edited:
stav2201 said:
Yes, but, when that pint glass gets cold it becomes more brittle and shrinks. Ever had 2 glass cups stuck together when they were stacked on eachother? Put em in the freezer and the molecules stick together tighter making the glass smaller so you can take them apart easier. Its all the heating and cooling of battery, less charge means less heat being created. When you apply heat to cold (Battery being warm from charged after riding the bike) then apply coldness to it, the molecules will re-align and suck in the walls of the battery if you will.

And to answer the question of the battery being bad...
-If the case is cracked its bad
-If it is incapable of holding a proper charge its bad
-If it works fine and charges good, then its good!
Click to expand...

did you major in Pseudo Science, or is it all self taught?
 
stav2201 said:
Nope, did neither... But i did stay at a holiday inn
Click to expand...

Maybe you should try school instead.

When a battery is "dead" it's because the electrons have traveled from one half (the annode) to the other half (the cathode). They don't just disappear. There is no net gain/loss.

They do this because the anode is at a higher potential than the cathode, thus the lowest energy state of the battery is when both nodes are at the same potential (ie battery is depleted).
 
Last edited:
Whisky_Richard said:
Maybe you should try school instead.

When a battery is "dead" it's because the electrons have traveled from one half (the annode) to the other half (the cathode). They don't just disappear. There is no net gain/loss.

They do this because the anode is at a higher potential than the cathode, thus the lowest energy state of the battery is when both nodes are at the same potential (ie battery is depleted).
Click to expand...

Whiskey Dick? :laughing
 
Whisky_Richard said:
Maybe you should try school instead.

When a battery is "dead" it's because the electrons have traveled from one half (the annode) to the other half (the cathode). They don't just disappear. There is no net gain/loss.

They do this because the anode is at a higher potential than the cathode, thus the lowest energy state of the battery is when both nodes are at the same potential (ie battery is depleted).
Click to expand...

This.

Also, just because a battery can take and hold a charge doesn't mean that it's good for the job it was intended to do. For instance, you could have sulfation that has destroyed 75 percent of the internal surface area of the battery. What this does it effectively make your battery only 1/4 the size and capacity it once was. The remaining 25 percent might indeed be capable of taking and holding a full charge (and that's what your volt meter would indicate), however, since 3/4 of the battery is gone, it would be completely inadequate for starting the bike. And it would take very little drain to discharge the battery.

The only way to tell if the battery has the capacity (amps) to do its job is to perform a load test. An electrical load of a know size is applied to the battery for a certain amount of time and the battery voltage is monitored. That's really the only test that can tell you if the battery is good. And don't use those pieces of crap that Kragens and other shops use to load test a battery. They use an electronic shortcut to simulate a load test and they are most often completely inaccurate. Fine someone who has a real load tester. And make sure it's designed to test small, motorcycle size/capacity batteries.
 
Oh, and concave/convex battery cases are the result of pressure buildup and loss due to heat and/or elevation changes. Normally, if properly vented, the battery won't change it's shape. If the vent is malfunctioning for some reason, you'll see those changes. Another cause is that the injection molding process often induces some internal stresses in the case and sometimes they'll just take that shape as a matter of course.
 
ST Guy said:
Oh, and concave/convex battery cases are the result of pressure buildup and loss due to heat and/or elevation changes. Normally, if properly vented, the battery won't change it's shape. If the vent is malfunctioning for some reason, you'll see those changes. Another cause is that the injection molding process often induces some internal stresses in the case and sometimes they'll just take that shape as a matter of course.
Click to expand...

^ this, what ive been trying to say this entire time
 
You must log in or register to reply here.
Back
Top