3.6oz Carbon Fiber Battery Bracket for Shorai LFX21L6-BS12 - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

Anthony · 01-31-2015, 05:52 PM

I decided to make my own battery bracket out of carbon fiber. Some of you may remember my elaborate zip tie job. Classy as it was, the SCCA folks were never particularly enthused about it, so this is a bit of an upgrade. This is my first project with composites, so it's pretty crude and ugly (didn't even bother smoothing the edges) but it's strong and light.

The bracket itself weighs 2.6oz.

I tend to get excited about things. So once I was done, I quickly found some hardware lying around my house. I could go buy some nicer, and probably lighter, stuff at the hardware store, but... we'll deal with that later. Random hardware added ~38% weight - exactly an ounce.

The bracket consists of two separate pieces. The top piece bolts directly to the chassis in the existing battery bracket... bracket.

The bottom piece is adhered to the battery using two strips of 3M double sided tape. I considered filming it, but I was too lazy... after sticking the bottom piece to the battery, I held the carbon without touching the battery and swung it around like a viking on PCP. The tape held strong. I then bolted the bottom piece to the chassis using self-tapping screws.

If I make another one, I'll add a tab on the bottom piece for a third screw to go in opposite of the two screws on bottom. I expected it to flex, being only bolted down on one side, and it absolutely does. However, it's not going anywhere. I'm very confident that I could even wreck the car and the battery would stay in place.

philooo · 02-07-2015, 10:45 PM

the minimalistic approach and design is very nice.
I think you have put the finger onto something interesting there

can you remind us of your battery choice ?

Anthony · 02-08-2015, 10:39 AM

Thanks! The battery is a Shorai LFX21L6-BS12. It only weighs 3 pounds. So between my battery and it's bracket, it's only 3lbs 3.62oz.

gkubed · 04-01-2020, 03:21 PM

Quote:

Originally Posted by Anthony

I'm very confident that I could even wreck the car and the battery would stay in place.

In the most respectful manner possible...did it?

Anthony · 04-02-2020, 10:36 AM

Quote:

Originally Posted by gkubed

In the most respectful manner possible...did it?

Hahahahaha! I don't even remember saying that, but yes. Yes it did. Didn't even budge.

ML · 04-02-2020, 02:48 PM

Quote:

Originally Posted by Anthony

Hahahahaha! I don't even remember saying that, but yes. Yes it did. Didn't even budge.

OMG HE LIVES!

01-31-2015, 05:52 PM	#1
Anthony Weight Nazi Join Date: Aug 2012 Drives: 13 FRS -399lb, 11 335is, 05 Tiburon Location: Biloxi, MS / Gulf Coast 86 Posts: 3,702 Thanks: 5,009 Thanked 3,712 Times in 1,765 Posts Mentioned: 150 Post(s) Tagged: 4 Thread(s)	3.6oz Carbon Fiber Battery Bracket for Shorai LFX21L6-BS12 I decided to make my own battery bracket out of carbon fiber. Some of you may remember my elaborate zip tie job. Classy as it was, the SCCA folks were never particularly enthused about it, so this is a bit of an upgrade. This is my first project with composites, so it's pretty crude and ugly (didn't even bother smoothing the edges) but it's strong and light. The bracket itself weighs 2.6oz. I tend to get excited about things. So once I was done, I quickly found some hardware lying around my house. I could go buy some nicer, and probably lighter, stuff at the hardware store, but... we'll deal with that later. Random hardware added ~38% weight - exactly an ounce. The bracket consists of two separate pieces. The top piece bolts directly to the chassis in the existing battery bracket... bracket. The bottom piece is adhered to the battery using two strips of 3M double sided tape. I considered filming it, but I was too lazy... after sticking the bottom piece to the battery, I held the carbon without touching the battery and swung it around like a viking on PCP. The tape held strong. I then bolted the bottom piece to the chassis using self-tapping screws. If I make another one, I'll add a tab on the bottom piece for a third screw to go in opposite of the two screws on bottom. I expected it to flex, being only bolted down on one side, and it absolutely does. However, it's not going anywhere. I'm very confident that I could even wreck the car and the battery would stay in place. __________________ Build Thread \| The Venus Project \| Any car which holds together for a whole race is too heavy.

02-07-2015, 10:45 PM	#2
philooo Senior Member Join Date: Mar 2014 Drives: 13' Scion FRS Track car Location: miami Posts: 417 Thanks: 76 Thanked 107 Times in 84 Posts Mentioned: 7 Post(s) Tagged: 2 Thread(s)	the minimalistic approach and design is very nice. I think you have put the finger onto something interesting there can you remind us of your battery choice ? __________________ 2013 Scion Frs Track Car - Sold.

02-08-2015, 10:39 AM	#3
Anthony Weight Nazi Join Date: Aug 2012 Drives: 13 FRS -399lb, 11 335is, 05 Tiburon Location: Biloxi, MS / Gulf Coast 86 Posts: 3,702 Thanks: 5,009 Thanked 3,712 Times in 1,765 Posts Mentioned: 150 Post(s) Tagged: 4 Thread(s)	Thanks! The battery is a Shorai LFX21L6-BS12. It only weighs 3 pounds. So between my battery and it's bracket, it's only 3lbs 3.62oz. __________________ Build Thread \| The Venus Project \| Any car which holds together for a whole race is too heavy.

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