Deleted Member 183
Well-known member
I have just developed/ fab'd these:
Safe Ebike Battery Charging/ Travel Storage
- Thread starter Deleted Member 183
- Start date
mog
Kodiak Buckaroo
DM183, I'm glad you posted that. I've have my eBike batteries (three 48vdc 7.8 AH each) in a 20mm ammo can (it is the style of the 'normal' 30 & 50 cal cans only larger) and have wondered if I have a false security in that. Burning lithium batteries are way out of my lane, and knowing you are not only an all round smart guy, but have been on the forefront of this tech, so if your Jerry can wall thickness is adequate protection, then my ammo can thickness should be good also ? My concern has been if one or more of the batteries light off they will burn hot enough to just turn the ammo can into poor man's thermite and add to the blaze.
Peter_n_Margaret
Adventurer
From my relatively immature perspective, the first question re "Lithium" batteries is to be more specific about the chemistry.
LiFePO4 is "safe" in comparison to most of the others. I would not charge any of the others unless it was within my sight.
Cheers,
Peter
OKA196 motorhome
LiFePO4 is "safe" in comparison to most of the others. I would not charge any of the others unless it was within my sight.
Cheers,
Peter
OKA196 motorhome
mog
Kodiak Buckaroo
Peter, so when not charging, (lithium-ion, made in China), is there a very low chance of them self-igniting into a conflagration burning/melting everything in their path ??
When I do charge them, it is outdoors away from everything (perhaps I am overly caution, due to watching too many EVs going up in flame videos on YouTube?)
When I do charge them, it is outdoors away from everything (perhaps I am overly caution, due to watching too many EVs going up in flame videos on YouTube?)
Peter_n_Margaret
Adventurer
Deleted Member 183
Well-known member
Granted I am new into the "E vehicle" thing. However, I am probably going to start building bikes again, Ebikes ( Mfg of bikes & components is how i started my career).
So this is what I have learned so far:
Bad cheap batteries start fires.
Buy batteries a reputable firm what will offer you the option of what brand of "top end" cell you desire, then produce the serial number of each of the cells in the battery.
Each battery should have its own BMS (battery management system) what will never permit you to be able over charge, or over deplete (this is the REAL bad one) the battery.
The battery charger should be bought with the battery and work in conjunction with the BMS.
The batteries should be charged and stored in metal containers when possible. Ammo box's are good but need a slot cut for the charging cable.
Steel mail box's are fine, but aluminum ones will melt.
I have a bunch of NATO Jerry Can's sitting around (Unikat Charlie will have to share the story why) and thought it would be clever to use the spout cap as a latch. It turned out perfect after a little experimentation, but now think that it is a 100% success!
Here is the battery company i use:
https://em3ev.com/
Not cheap and can take several weeks to get a battery from China! But top quality and the company is very good at communicating with their customers.
So this is what I have learned so far:
Bad cheap batteries start fires.
Buy batteries a reputable firm what will offer you the option of what brand of "top end" cell you desire, then produce the serial number of each of the cells in the battery.
Each battery should have its own BMS (battery management system) what will never permit you to be able over charge, or over deplete (this is the REAL bad one) the battery.
The battery charger should be bought with the battery and work in conjunction with the BMS.
The batteries should be charged and stored in metal containers when possible. Ammo box's are good but need a slot cut for the charging cable.
Steel mail box's are fine, but aluminum ones will melt.
I have a bunch of NATO Jerry Can's sitting around (Unikat Charlie will have to share the story why) and thought it would be clever to use the spout cap as a latch. It turned out perfect after a little experimentation, but now think that it is a 100% success!
Here is the battery company i use:
https://em3ev.com/
Not cheap and can take several weeks to get a battery from China! But top quality and the company is very good at communicating with their customers.
Last edited:
llamalander
Well-known member
Extra points for the lid as a latch, nicely executed!
Bandsaw?
Bandsaw?
Deleted Member 183
Well-known member
Mostly cutt-off wheel on a hand grinder and low power plasma cutter for the radii.
Deleted Member 183
Well-known member
I wanted to share some more pictures of the little "Peccadillo's" I added to my travel battery box:
I added D-rings to the side of the spout so that the box can be locked closed & cable locked to the vehicle.
I added a retractable key fob to hold the key for the battery (to bike) lock.
You can also see the small/ tight rubberized slot for the charger cable on the right side of the hinge.
I added D-rings to the side of the spout so that the box can be locked closed & cable locked to the vehicle.
I added a retractable key fob to hold the key for the battery (to bike) lock.
You can also see the small/ tight rubberized slot for the charger cable on the right side of the hinge.