GO Far.

  and maybe a bit further.

Know your coulombs…. No but seriously.

Configure your on-board battery storage system wisely and get where you need to be… and back home.

Qulomb Engineering Tool

Battery Pack Configurator

Build from cell to module to full HV pack. Calculate voltage, energy, current limits, deliverable power, cost density, and DCR-based fast-charge thermal load.

Pack Snapshot Calculate pack
—
Layout—
Vnom—
Window—
Cells—
Ah—
Tap Count—
Discharge—
Cont. kW—
Peak kW—
Charge—
Est. Rpack—
$/usable kWh—

Cell Definition

Preset values are typical engineering defaults. Always replace with the exact cell datasheet values before design release.
Ah
V
V
V
C
C
C
C

Module & Pack Layout

S
P
5taps
Auto: cells in series per module + 1
x
x
x

Cost Inputs

$
$
Compression hardware, enclosure, busbars, sensors, local BMS boards, etc.
$
Main enclosure, coolant hardware, contactors, fuse, HV cabling, pack BMS, etc.
code

Thermal Inputs

mΩ
mΩ
°C
kJ/kgK
kg/L

Pack Split Config

Split the total module stack into separate physical packs. Useful for underfloor boxes, rear boxes, serviceable sub-packs, or avoiding one giant spicy brick.

—modules
Calculate pack to validate split configuration.

Pack Split Summary

Each split pack is calculated from the number of modules assigned to it.

PackModulesCell LayoutNominal VoltageVoltage WindowEnergyTap Count
Calculate pack to generate split summary.

Cable & Busbar Thermal Budget

  • Resistance input method: enter measured mΩ from milliohm testing, or calculate from material, length, and CSA.
  • Naming shorthand: P1 = Pack 1, M6 = Module 6, (+)CON / (-)CON = positive / negative connector.
  • Switchgear shorthand: (+)CTTR / (-)CTTR = positive / negative contactor, MSD = pack service disconnect.
  • Example: P1_M6_to_(-)CTTR_A = Pack 1 Module 6 to negative contactor A-side.
A
Auto: continuous discharge current
Cell DCR is excluded from the Cable & Busbar loss total.
Total Added Resistance—
Total I²R Loss—
Default Current—
Est. Efficiency—

Pack Loss break down (editable)

Use measured mΩ where available. The table viewport shows 10 rows at a time; header row and item name stay pinned while you scroll.

Measured values should win over calculated values when you have trustworthy four-wire milliohm data.

Fast Charge Range

kW
kW
kW
Calculate pack to show recommended continuous and peak charge power from cell C-rates.

DC Fast Charge Thermal Table

Rows are highlighted when they align with continuous or peak charge C-rate limits. Swipe sideways on mobile; header row and charge power column stay pinned.

Recommended continuous Peak Above peak
Charge PowerPack CurrentCell CurrentCharge C-RatePack Resistive HeatCell HeatCooling Flow
Calculate pack to generate fast-charge thermal table.

Design Notes

This tool calculates electrical configuration only. It does not save you from bad packaging, bad creepage, bad cooling, or bad judgment.
No calculation yet.
Pack Energy—
Nominal Voltage—
Pack Layout—
Deliverable Power—

Battery Configuration Summary

Swipe sideways on mobile. Header row and first column stay pinned.

ParameterCell LevelModule LevelPack Level
Configuration
ConfigurationSingle cell——
Cell Count1 cell——
Series / Parallel1S1P——
Tap Count———
Voltage & Energy
Voltage Window———
Nominal Voltage———
Capacity———
Nominal / Gross Energy———
Usable Energy———
Current & Power
Continuous / Peak Charge Current———
Continuous / Peak Discharge Current———
Continuous / Peak Deliverable Power———
Cost
Total Cost———
Cost per kWh———