Let's talk lithium batteries
#27
~17 MPG
iTrader: (2)
On other cars, I've seen people mount small batteries under the dash near where the stereo and cabin fan are usually located. This might be an option for relocating lithium batteries without running so much extra wire.
Someone on these forums mounted a small lithium battery where the factory jack and/or spare tools are usually stored... I'll try to find the thread.
Someone on these forums mounted a small lithium battery where the factory jack and/or spare tools are usually stored... I'll try to find the thread.
#30
Rotary Motoring
iTrader: (9)
A Shorai is small enough to tuck between the brake master cylinder and the ignitor if you haven't used that space already.
If you delete AC it will fit down there against the frame rail if you don't have plans for that real estate.
Its so small and light you could tuck it many places in the engine bay with less hassle than the full relocation.
If you delete AC it will fit down there against the frame rail if you don't have plans for that real estate.
Its so small and light you could tuck it many places in the engine bay with less hassle than the full relocation.
#31
Instrument Of G0D.
iTrader: (1)
^ also i suspect these bike batteries to be mostly hollow plastic box to let them fit where their lead acid equivalent would - and could possibly gut them to get them down to their true size? At least thats the impression i got from the one i put in my bike, because it weighs nothing. Kinda irks me they do that because i could just use some octopus straps or racing wood mounting solutions and free up enough extra space under the seat for a sandwich or a couple of ****** or a kilo of cocaine on those border crossings from time to time.
#34
Long time on-looker
iTrader: (33)
I've used the large Shorai since 2014. My car is primarily a track car and I have it mounted in the stock location using a custom battery tray. I wrapped the battery with gold DEI foil to help fight the heat.
It's important to get/use the Shorai charger. I've gone a few weeks without having it on the trickle charger without issue but I think you'd want to make sure it's plugged in for longer storage.
In cold weather (40s and below) when I leave the car out overnight at an event the car will be slow to crank when cold. If you turn on the parking lamps and put a draw on the battery for a couple minutes it actually warms the battery and helps with this. It's only necessary after sitting overnight like that. But anyone trying to DD in colder weather should avoid it. Dale you won't have this problem in FL.
My brother has used the same battery in his GT3 for 5 years with similar success but did have to replace the charger. Overall I, very happy and it's the cheapest easiest weight loss out there.
It's important to get/use the Shorai charger. I've gone a few weeks without having it on the trickle charger without issue but I think you'd want to make sure it's plugged in for longer storage.
In cold weather (40s and below) when I leave the car out overnight at an event the car will be slow to crank when cold. If you turn on the parking lamps and put a draw on the battery for a couple minutes it actually warms the battery and helps with this. It's only necessary after sitting overnight like that. But anyone trying to DD in colder weather should avoid it. Dale you won't have this problem in FL.
My brother has used the same battery in his GT3 for 5 years with similar success but did have to replace the charger. Overall I, very happy and it's the cheapest easiest weight loss out there.
#35
RX-7 Bad Ass
Thread Starter
iTrader: (55)
Thanks Smokey! Good info there.
Long term I may run one, I am building a car right now (literally ground up) for one of the guys here in town (Jon) and we are thinking about doing this. Going to have a V-mount so there won't be much room.
I think it makes a lot of sense to use the Shorai charger as well. I like how it plugs in and is intelligent about it.
Dale
Long term I may run one, I am building a car right now (literally ground up) for one of the guys here in town (Jon) and we are thinking about doing this. Going to have a V-mount so there won't be much room.
I think it makes a lot of sense to use the Shorai charger as well. I like how it plugs in and is intelligent about it.
Dale
#38
Long time on-looker
iTrader: (33)
In my opinion using the Shorai charger is a must. Other chargers will ruin lithium batteries and you want to have the trickle charger "storage" option on the Shorai charger.
The mount for my battery is a custom aluminum unit I had made up. It uses the factory mount holes and I'd think any fab shop should be able to do something similar. It doesn't have to be very crazy as the battery is VERY light.
The positive terminal was a compromise in that I didn't want to lower that fuse block nor raise the battery. So that green piece is a non-conductive material that I then have a long bolt that goes thru down to the terminal. If I were to do it again I'd likely find a way to lower that fuse block as it'd be cleaner.
The mount for my battery is a custom aluminum unit I had made up. It uses the factory mount holes and I'd think any fab shop should be able to do something similar. It doesn't have to be very crazy as the battery is VERY light.
The positive terminal was a compromise in that I didn't want to lower that fuse block nor raise the battery. So that green piece is a non-conductive material that I then have a long bolt that goes thru down to the terminal. If I were to do it again I'd likely find a way to lower that fuse block as it'd be cleaner.
#39
Racecar - Formula 2000
General comment on insulation..
I'd like to comment on insulating things that generate heat on their own.
Insulation only reduces the rate of heat transfer. It does not totally stop it. Therefore, after extended time in a hot environment, the insulated item will eventually reach the same temperature as the environment even if it does not generate internal heat, which things like batteries and shock absorbers do.
If the insulated item generates heat, it will eventually reach a temperature above that of the surrounding environment. If it does, the only thing that will keep it cool is a cool air flow. Insulation will make matters worse. That is why the OE battery box was ventilated, not insulated.
Reflective insulation is good to keep something from getting too hot from heat radiation, either through leaving the other side bare to get the excess heat out, or from internal liquid flow through a hose or tube.
Insulation only reduces the rate of heat transfer. It does not totally stop it. Therefore, after extended time in a hot environment, the insulated item will eventually reach the same temperature as the environment even if it does not generate internal heat, which things like batteries and shock absorbers do.
If the insulated item generates heat, it will eventually reach a temperature above that of the surrounding environment. If it does, the only thing that will keep it cool is a cool air flow. Insulation will make matters worse. That is why the OE battery box was ventilated, not insulated.
Reflective insulation is good to keep something from getting too hot from heat radiation, either through leaving the other side bare to get the excess heat out, or from internal liquid flow through a hose or tube.
#40
Always Bad Advice
20 Years of Tiny Battery Use
I have been using this Lithium Iron battery in my now occasional track car here in SoCa for 5 years. At 210 CCA, 14 Ah, and 1.5 lbs they are so light and small I keep an extra one, in the tool box, charged up and ready to go just in case. (I have yet to need it)
Before Lithium Iron technology came out, I used a PC680. I wore out 3 of them over a period of about 15 years. But, at 170 CCA, 16 Ah, and 14.5 lbs it was too heavy.
When not in use both of these batteries were connected to my trusty 20 year old BatteryMinder:
Before Lithium Iron technology came out, I used a PC680. I wore out 3 of them over a period of about 15 years. But, at 170 CCA, 16 Ah, and 14.5 lbs it was too heavy.
When not in use both of these batteries were connected to my trusty 20 year old BatteryMinder:
#41
Lousy Crew Chief
iTrader: (10)
The Lithium batteries might be great for some, but not for everyone.
FWIW, NASA does not allow Lithium batteries to be mounted in the cabin due to the fire hazard. An AGM can be mounted in the cabin. I just got a Braille 2015 battery and it has 425 CCA and weighs 15lbs. It might be 10lbs heavier than the Lithium battery, but I can also safely mount it in my passenger bin.
Someone commented on mounting the lithium battery next to the brake master. That seems like an awesome spot for it if you have your cruise control deleted.
Matt
FWIW, NASA does not allow Lithium batteries to be mounted in the cabin due to the fire hazard. An AGM can be mounted in the cabin. I just got a Braille 2015 battery and it has 425 CCA and weighs 15lbs. It might be 10lbs heavier than the Lithium battery, but I can also safely mount it in my passenger bin.
Someone commented on mounting the lithium battery next to the brake master. That seems like an awesome spot for it if you have your cruise control deleted.
Matt