Quick Answer
Calculate Battery Pack Series-String Current Imbalance Estimator (Interconnect Resistance Variation)
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Battery Pack Series-String Current Imbalance Estimator (Interconnect Resistance Variation) calculator computes Peak current imbalance between parallel series strings in A using the defined engineering formula and the input values provided. Peak current imbalance between parallel series strings is expressed in A. No universal acceptance threshold is defined by this calculator.
Worked Example
Verified calculation
Given:
- Total pack current = 150
- Per-string equivalent series resistance (including cells and busbars) = 0.0012
- Maximum interconnect resistance among parallel branches = 0.00035
- Minimum interconnect resistance among parallel branches = 0.00025
Expected Result:
- Peak current imbalance between parallel series strings = 5
Engineering Interpretation:
Under the given input conditions, the calculated result is: Peak current imbalance between parallel series strings = 5 A.
The actual numerical result is computed by the Runtime engine using the persisted tool definition. The values shown here come from deterministically validated test cases.
Formula / Method
peak current imbalance between parallel series strings = abs(total pack current * (maximum interconnect resistance among parallel branches - minimum interconnect resistance among parallel branches) / (2 * (including cells and busbars + (maximum interconnect resistance among parallel branches + minimum interconnect resistance among parallel branches)/2)))Formula family: formula_battery_battery_pack_series_string_current_imbalance_estimator_interconnect_resistance_variation
Variables
| Symbol | Label | Role | Description |
|---|---|---|---|
| I_total | Total pack current | INPUT | Total pack current |
| R_string | Per-string equivalent series resistance (including cells and busbars) | INPUT | Per-string equivalent series resistance (including cells and busbars) |
| R_interconnect_max | Maximum interconnect resistance among parallel branches | INPUT | Maximum interconnect resistance among parallel branches |
| R_interconnect_min | Minimum interconnect resistance among parallel branches | INPUT | Minimum interconnect resistance among parallel branches |
| current_imbalance | Peak current imbalance between parallel series strings | OUTPUT | Peak current imbalance between parallel series strings |
Calculation Steps
- Enter the total pack current in A.
- Enter the per-string equivalent series resistance (including cells and busbars) in ohm.
- Enter the maximum interconnect resistance among parallel branches in ohm.
- Enter the minimum interconnect resistance among parallel branches in ohm.
- Step 1: Compute peak current imbalance between parallel series strings.
- Read the peak current imbalance between parallel series strings (A) from the results.
Engineering Summary
Calculate Battery Pack Series-String Current Imbalance Estimator (Interconnect Resistance Variation)
Frequently Asked Questions
What does this calculator calculate?
The Battery Pack Series-String Current Imbalance Estimator (Interconnect Resistance Variation) calculator estimates Peak current imbalance between parallel series strings based on the input parameters you provide
Why is total pack current important in this calculation?
total pack current is used directly in the calculation of peak current imbalance between parallel series strings. Its effect on the result depends on the complete formula and the values of the other inputs.. When you enter total pack current in A, the calculator uses it in the engineering formula to compute the output
How should I interpret the result peak current imbalance between parallel series strings?
The calculator outputs peak current imbalance between parallel series strings in A. The result is computed directly from the input values using the defined engineering formula
What units should I use for the inputs?
Enter each value in the units shown next to the input field: Total pack current (A), Per-string equivalent series resistance (including cells and busbars) (ohm), Maximum interconnect resistance among parallel branches (ohm), Minimum interconnect resistance among parallel branches (ohm). Make sure all inputs use the specified units for consistent results
What assumptions does this calculator use?
This calculator uses automatically validated engineering formulas. Results are approximate and should be validated against site-specific conditions, applicable codes, and professional engineering judgment
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