Table of Contents |
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Assumptions
18650 Battery Assumptions
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- Would need to step down the voltage to 12v which may introduce some losses.
- Could not charge it off of the car
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Configuration
Battery Spec
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3S56P - (
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130 Ah)
Specification | Value |
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Nominal Voltage (3 x 3.7v) | 11.1v |
Max Voltage (3 x 4.2v) | 12.6 |
Min Voltage (3 x 3.0v) | 9v |
Cells in Series for Voltage | 3 |
Parallel Cells to Get Capacity 80Ah/2.0Ah | 3256 |
Total Cells Required | 96168 |
Specification | Details |
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Capacity | 64112-73128.6 8 Ah |
Cell Capacity | 2.0-2.3 Ah |
Cells | 3x323x56=96 cells |
If we build 2 of these and connect them together we get
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168 cells |
Battery Capacities and Pack Configurations
https://docs.google.com/spreadsheets/d/1mlgodp0UQAi1QGu0aGxJdH-wnCkg5dZosCjmBs_kSDo/edit#gid=0
Rpackr Configuration:
The Plano 50 Cal Ammo Box will can hold 2 of these packs for a total of 150Ah ( 192 cells (about 150Ah).
Battery Management System
50A BMS
3Series 50A 11.1V/12V/12.6V BMS PCB Protection Board for 18650 3S 100A Li-ion Lithium 18650 BMS Battery Charger Protection Board Battery Cell with Balance
Features | ||||||||||||
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Continuous Discharge Current: 50A Momentary Discharge Current: 150A Charge Voltage: | ||||||||||||
Feature | Details | |||||||||||
Large discharge current | 100A | |||||||||||
Instantaneous discharge current | 150A | |||||||||||
Charging voltage | Overcharge detection voltage | 12.6V | ||||||||||
Large charge current | 10A | |||||||||||
Charge Current: 50A Overcharge Detection Voltage: 4.28±0.05V025V Overcharge protection delayProtection Delay: 0.5S Overcharge release voltageCancel Voltage: 4.08±0.1V | Power balance detection voltage | Balance Detection Voltage: 4.20±0.05V | Power balance release voltage | 025V Balance Cancel Voltage: 4.20±0.05V | Electricity balance current | Balance Current: 60±5mA42±5mA Over discharge detection voltage-discharge Detection Voltage: 2.8±0.1V | Overdischarge detection delay | Over-discharge Detection Delay: 0.1S Over | discharge release voltage-discharge Cancel Voltage: 3.0±0.1V Overcurrent | detection voltageDetection Voltage: 150mV Overcurrent | detection delayDetection Delay: 9mS Overcurrent | protection current200±10A |
Overcurrent protection release condition | Disconnect the load | |||||||||||
Short circuit protection conditions | External load short circuit | |||||||||||
Short circuit detection delay | 250uS | |||||||||||
Main circuit conduction resistance | ≤25mΩ | |||||||||||
Working current | ≤20uA | |||||||||||
Sleep current (when battery is over) | ≤10uA | |||||||||||
Size | 8.2x5.1cm/3.23x2.01inch |
Test Results of Batteries
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Protection Current: 200±10A Protection Cancel Condition: Disconnect Load Short Circuit Protection Condition: Outside Load Short Circuit Short Circuit Detection Delay: 250uS Protection Cancel Condition: Disconnect Load Main Circuit Conduction Internal Resistance: ≤25mΩ Working Current: ≤30uA Sleeping Current(Battery Over-discharge): ≤10uA Operating Temperature:﹣30℃~﹢80℃ Size: 75×51.5×15mm/2.95×2.02×0.59" |
100A BMS
3Series 50A 11.1V/12V/12.6V BMS PCB Protection Board for 18650 Li-ion Battery Cell with Balance
Battery Hookup Modem Batteries
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Almost every pack we opened had the light blue lg cells, some had dark blue lg cells with the same specs. Either way they are all name brand cells, the best ones out there
I purchased 16x8 = 128 cells.
Packaging
I bought Plano 50 Cal Ammo Box, Black
Interior dimensions: 11.25" x 5.5" x 7"
Build
Battery Capacities
https://docs.google.com/spreadsheets/d/1mlgodp0UQAi1QGu0aGxJdH-wnCkg5dZosCjmBs_kSDo/edit#gid=0
Rpackr Configuration:
Build Pictures
Revised Build Pictures
Added 100A BMS and additional wiring to support the load. Then added terminals and USB and 12V port.
Added a battery meter
References
Reference | URL |
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Buying Used Batteries | https://batteryhookup.com/ |
Battery Pack Calculator | http://repackr.com/ |