6070

6070
860 S. 19th St. Unit A, Richmond CA 94804
Tel: 1-510-525-2328 Fax: 1-510-439-2808
Instruction on how to assembly a 25.6V 12.5Ah LFP Pack (prod id: 6070)
Note: this instruction is just a simple instruction showing how to build the above pack.
It is expect the end user will have basic knowledge on electronic and understand the
risk of building a pack. We are not liable for any lost or damage due to misassembling or any wrong doing.
Items need or purchased from us:
1.
2.
3.
4.
5.
6.
7.
Part no: PV-280 x 1 ( not currently available due to out of stock)
Part no: PCM-LFP25.6V100A x 1 (PCM)
Fish Paper x 1
#6 AWG (30”) x 1 Red wire
#6 AWG (30”) x 1 Black wire
#14 AWG (20”) x 1 Red wire
#14 AWG (20”) x 1 black wire
Procedure:
1. Layout the 40 cells as shown in picture 1 (5 x8 layout)
Picture 1
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860 S. 19th St. Unit A, Richmond CA 94804
Tel: 1-510-525-2328 Fax: 1-510-439-2808
Note: The cell with “white ring” is the positive of the battery. Check the voltage
of each cell to ensure all of them are closely matched before assemble them to be a
pack.
2. Weld or solder batteries together by first connect 5 cells in parallel to increase
capacity of the cell. Ex: each is 2.5Ah x 5 = 12.5Ah. See picture 2 on how the
cells are combine together with tabs
Picture 2
Note: you will do the same on the other end of battery pack.
3. Now you will solder or weld the tabs together in series to make it into a 25.6V
pack. See picture 3 (top view).
Picture 3
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860 S. 19th St. Unit A, Richmond CA 94804
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Note: you will solder on the other end to complete the serial connection
4. Solder the open end sense wires from the PCM’s ribbon cable connector to
the appropriate location of the pack. Please view the block/schematic on the
pdf file. See link below for it:
http://www.batteryspace.com/prod-specs/2956_3.pdf
Note: you will need to determine how long the sense wires need to be from
the pack to the PCM’s ribbon cable connector before you cutoff excessive
length of wires.
5. Solder both the #6 AWG Red wire & #14 AWG Red wire (you need to
determine how long the wire need) to Positive of Battery #8. This is the P+
which is the positive of the PCM and is the same point for your positive
connection to the charger (#14 AWG wire) and your device (#6 AWG
wire)
6. Use the #6 AWG Black wire (you need to determine how long the wire need)
as the connection from Negative of Battery #1 to B- on the PCM
Note: before you solder the battery wires to PCM, add the Fish Paper (you need
to cut to size) as insulation between PCM and pack. See picture 4 and 4A
Picture 4 (top view)
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860 S. 19th St. Unit A, Richmond CA 94804
Tel: 1-510-525-2328 Fax: 1-510-439-2808
Picture 4A (side view)
Note: Add the Fisher Paper to bottom of pack for insulation. If you like you
can add the Fish Paper to both side for additional insulation and protection. One
side of Fisher Paper has glue on it so you can just glue it to the pack.
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860 S. 19th St. Unit A, Richmond CA 94804
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7. Now lay the PCM on top of the battery pack. See picture 5
Picture 5
8. Determine the exact location of the PCM, use double side tapes to glue the
PCM on top of the Fisher Paper
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860 S. 19th St. Unit A, Richmond CA 94804
Tel: 1-510-525-2328 Fax: 1-510-439-2808
9. Plug the ribbon cable connector to the mating socket on the PCM. See
Picture 6
Picture 6
10. Solder the B- (#16 AWG black wire) to the B- of the PCM
11. Solder a #16 AWG black wire to the P- of the PCM. This is for your Negative
of your device
12. Solder a #14 AWG black wire to the P- of the PCM. This is for the Negative of
your charger.
13. You now completed the assembly of the 25.6V 12.5Ah LFP pack.
Tel: 1-510-525-2328, Fax: 1-510-439-2808, E-mail: sales@batteryspace.com
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860 S. 19th St. Unit A, Richmond CA 94804
Tel: 1-510-525-2328 Fax: 1-510-439-2808
Testing / troubleshooting the pack:
1. If you hook the DVM across B+ of battery and P- at PCM, you should read
around 25.6V. This means you have successfully assembled this battery pack.
2. If you don’t’ read any voltage on the DVM on B+ and P-, connect the DVM
between B+ and B- and you should read around 25.6V. If you do read this,
the battery pack is build correctly. You now connect the 25.6V charger across
B+ and P- should “reset” the PCM and your pack should be operational.
3. If you don’t read 25.6V at B+ and B- or the voltage is way too low, then you
need to check to make sure the pack is build correctly as you measure each
3.2V 12.5Ah pack, you should read around 3.2V. If not, check your wiring and
battery to make sure you don’t have any bad cell or open connection
somewhere.
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