Sun Fun Kits V3.5 User manual

Sun Fun Kits V3.5 Assembly Manual
Revision 1.2

Before you Begin:
Thank you for purchasing your Sun Fun Kits V3.5 DIY battery kit, the diy battery kits makes
assembling your battery quick and easy and only requires basic tools and hardware. We
recommend having a basic understanding of DC wiring in order to assemble your battery pack.
You will also need the following tools:
● Hex driver set: 3mm, 4mm, 5mm, and 8mm
● Insulated drives for securing bolts
● Thread locking compound (such as blue Loctite)
● Kapton tape 1” to 2” in width
● Double Sided Sticky tape
● Velcro style loop
● DC Voltmeter
● DC Power Supply that is able to charge up battery cells (3.65 volts, 20 Amps)
Optional:
● Electrical Safe Silicone sealant (for those looking to make a water resistant battery)
● Hot glue gun (if you wish to secure wires using this method)
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Video Manual (V3 Manual):
If you are more of a visual learner, you can view the build process on our official youtube
channel: https://youtu.be/tWm65Pu0GuI
Preparing your battery cells:
Sun Fun Kits DIY battery kits support various prismatic cells, in this manual we will be using the
EVE LF304 type, however the process is the same for other manufacturers such as CATL,
REPT, Ganfeng and more, the V3 Kit includes spacers and other items to ensure maximum
compatibility for cells in this class (270-320 AH)
Certified Automotive Grade Cells generally do not require balancing; however, you may choose
to balance your cells, we have a video explaining this process.
This process is explained in this tutorial video:
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https://www.youtube.com/watch?v=JGbZozzCYvM
NOTE: if you are using an RTB (ready to build kit) the active balancer will assist in top balancing
your cells, simply assemble your pack, charge the battery at 5-20 amps and within 1-2 hours
your cells should be even balanced. Again, certified cells that are included with your RTB kit will
balance very quickly and the active balancer is included simply to assist balancing during high
amperage charging (over 80 amps).
Assembling your battery cells:
Starting with version 3.5 we are now including different cell shims or spacers, this allows users
to have a nice tight fit while also adding a third layer of insulation between cells. Version 3.5
includes 1 set of 1.5mm and 1.0mm shims (3 pieces each). The shims should be placed
between the inner cells and most installs will use about 3 shims. For Sun Fun Kits certified cells
(280K and LF304) you should be able to use 3 x 1.5mm shims to complete the install and have
a nice tight fit.
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If you find difficulty installing the 1.5mm shims you may go down to 1.0 MM shims, you can mix
and match the 1.0 and 1.5mm shims as needed to suit your install preference.
Basic Heating Element Setup:
Version 3.5’s basic heating element includes dual heating pads on the inside walls of your kit.
This provides good heating and will raise the inside temperature of your case evenly. This
method is quite easy to install and is the only method that should be used if you are using grade
B cells or swollen cells as it provides the most amount of spacing for the cells.
Begin by placing your cells in a series configuration with the left side of the battery having the
positive terminal on the lower left and the negative terminal on the lower right.
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