Regulator Voltage vs. Lithium-ion (Shorai) Batteries

Sgt80

Sgt80

Joined
Nov 21, 2017
Messages
135
Country flag
I came upon some information today for those of us with the Shorai batteries and I wondered about its accuracy. The 961 Voltage Regulators have a range of 14-15V. The ideal voltage set point for Lithium-ion batteries is 14V (plus or minus 0.2 volts). Supposedly, the standard voltage set point of 14.5-14.7 is too much for a Lithium-ion battery and can lead to damaged internal components in these batteries. How much damage and how quickly this can happen was not mentioned in the information that I read.

Any thoughts/comments?
 
SgtUSAF80 said:
I came upon some information today for those of us with the Shorai batteries and I wondered about its accuracy. The 961 Voltage Regulators have a range of 14-15V. The ideal voltage set point for Lithium-ion batteries is 14V (plus or minus 0.2 volts). Supposedly, the standard voltage set point of 14.5-14.7 is too much for a Lithium-ion battery and can lead to damaged internal components in these batteries. How much damage and how quickly this can happen was not mentioned in the information that I read.

Any thoughts/comments?
Click to expand...

The Shorai LFX battery manual says:

"Do not allow charge voltage in excess of 14.8V."
​
From the Shorai charging guide:

"When a Shorai LFX battery is fully charged it will measure a resting voltage of ~14.4V. Floating the LFX battery voltage at 14.6-14.8V for 24 hours can help to improve capacity and slow the self-discharge rate. "

That would seem to indicate that charging at 14.5 - 14.7 volts is ok.

Ken
 
icrken

I,ve had a large Shorai in my Commando since 2014 and charges at 13.5 to 14v with 3 phase Lucas alternator and Sparx reg/rec on analogue voltmeter.
My Yamaha Shorai (much smaller) since last March, and 7000 miles on, charges at 14.3 - 14.5v with original electrics.
Both bikes ridden with lights on and no problems to date but always carry compact Auperto power pack which will start and power both in case of battery malfunction, and charge my phone and ipad....
 
Last edited by a moderator:
Alton starter and Shorai battery (73 850 commando) installed and charging rate is well above 15 volts w/o headlights on. Thought of adding another Zener with a heat sink out of a computer. Any intelligent thoughts will surely be accepted. Thanks to all! Nortons Rule!
 
The way I understand it, a Shorai will live just fine at 13.3 volts charge, it just isn't fully charged. There's still plenty of power available, just not all of it.

Jaydee
 
jaydee75 said:
The way I understand it, a Shorai will live just fine at 13.3 volts charge, it just isn't fully charged. There's still plenty of power available, just not all of it.

Jaydee
Click to expand...
Dirt on the connectors and/or green/brown/black copper coloured wires will give a resistance to the amount of volts going into the battery from the generator- normal reading on multimeter on battery at say 3000 rpm with no indicators on but light switch both on and off should be 14.3 to 14.7 volts, any less at these revs, there IS something wrong, no question.
 

Similar threads

Fast Eddie
Shorai batteries
2 3 4 5 6
Replies
108
Views
12,072
Britfan60
Britfan60
W
  • Locked
Shorai Batteries new disclaimer/requirement
2
Replies
23
Views
1,844
mike996
mike996
Back
Top