储能与电池工程
ToolFusion / Battery Grading System / Engineering Tools

Project Tool: BMS Functional Verification and Graded Battery Acceptance Testing for Lithium-ion BESS

Specification & Integration Verification

F6 Composition for BMS Functional Verification and Graded Battery Acceptance Testing for Lithium-ion BESS

● Not Golden Verified ● Project Trust Verified Runnable: 3 / 6 steps
VERIFIED SCOPE
○ Compute max allowable voltage deviation based on grade tier CALCULATION Manual Workflow
○ Calculate actual cell voltage deviation from measurement set CALCULATION Manual Workflow
○ Compute percentage safety margin between BMS trip point and chemistry limit CALCULATION Runnable
○ Calculate SOH as ratio of stabilized discharge capacity to rated capacity CALCULATION Runnable
○ Assign grade level based on SOH numeric threshold bands PASS / FAIL capable Manual Workflow
○ Compute fault tolerance percentage from observed graceful degradation count CALCULATION Runnable
⚠ This tool does not currently verify Cell_voltage_deviation_monitoring_and_convergen..., SOC_estimation_accuracy_quantification, Grade_A_capacity_deviation_evaluation, EIS_based_SOH_estimation.
PROJECT INPUTS

Runnable deterministic steps: 3 / 6. Enter the project conditions used by this verification workflow. Prefilled values (8/9 inputs) are demonstration inputs, not recommended design values.

01Step 1: Compute max allowable voltage deviation based on grade tierManual Workflow
dimensionless
To enforce deterministic, grade-specific balancing tolerance per contractual specification (e.g., Grade A: ±10 mV, Gr...
02Step 2: Calculate actual cell voltage deviation from measurement setManual Workflow
V
To quantify worst-case imbalance across all cells in a module at target SOC, enabling pass/fail decision against grad...
03Step 3: Compute percentage safety margin between BMS trip point a...Formula
V
V
To verify that BMS intervention occurs sufficiently below the electrochemical stress threshold to prevent accelerated...
04Step 4: Calculate SOH as ratio of stabilized discharge capacity t...Formula
Ah
Ah
To quantify irreversible capacity loss incurred during formation cycling and initial aging, forming basis for reliabi...
05Step 5: Assign grade level based on SOH numeric threshold bandsManual Workflow
%
To enforce deterministic, auditable mapping from continuous SOH metric to discrete quality grade per contractual acce...
06Step 6: Compute fault tolerance percentage from observed graceful...Formula
count
count
To objectively measure resilience of BMS communication layer against protocol-level corruption, satisfying ISO 26262 ...

⚠ Runnable deterministic steps: 3 / 6. Steps marked "Input Required" or "Example Input Required" need user-provided engineering values before calculation.

Deterministic calculation · Results become stale when engineering inputs change.
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ENGINEERING EVIDENCE

Golden Coverage0 / 6
Project Trust11 / 11 PASS
RuntimeDeterministic
Components0 small tools, 6 steps

SCOPE & LIMITATIONS

NOT CURRENTLY VERIFIED
○ Cell_voltage_deviation_monitoring_and_convergence_timing
○ SOC_estimation_accuracy_quantification
○ Grade_A_capacity_deviation_evaluation
○ EIS_based_SOH_estimation
These capabilities are outside the current verified workflow.

HOW THIS VERIFICATION WORKS

  1. Step 1: Compute max allowable voltage deviation based on grade tier — engineering workflow step. Follow the documented method for manual execution.
  2. Step 2: Calculate actual cell voltage deviation from measurement set — engineering workflow step. Follow the documented method for manual execution.
  3. Step 3: Compute percentage safety margin between BMS trip point and chemistry limit — performs a deterministic calculation from the provided inputs. No acceptance criterion is applied; the result is CALCULATED only.
  4. Step 4: Calculate SOH as ratio of stabilized discharge capacity to rated capacity — performs a deterministic calculation from the provided inputs. No acceptance criterion is applied; the result is CALCULATED only.
  5. Step 5: Assign grade level based on SOH numeric threshold bands — compares engineering inputs against deterministic thresholds and produces a PASS or FAIL decision.
  6. Step 6: Compute fault tolerance percentage from observed graceful degradation count — performs a deterministic calculation from the provided inputs. No acceptance criterion is applied; the result is CALCULATED only.

This tool coordinates 1 validation step and 5 calculation steps. The overall engineering decision uses ALL_REQUIRED_VALIDATION_PASS aggregation: only validation steps contribute to the pass/fail outcome; calculation steps produce data only.

METHODS & EQUATIONS

All formulas are resolved from canonical runtime definitions and executed deterministically by the client-side engine.

Step 1: Compute max allowable voltage deviation based on grade tier

Manual Workflow
ΔV_max = 10·δ(G,1) + 25·δ(G,2) + 50·δ(G,3), where δ(a,b) = 1 if a==b else 0. Implemented as piecewise integer lookup via arithmetic selector.

Step 2: Calculate actual cell voltage deviation from measurement set

Manual Workflow
ΔV_meas = 1000 × (V_max − V_min), converting volts to millivolts for direct comparison with grade thresholds.

Step 3: Compute percentage safety margin between BMS trip point and chemistry limit

Formula100*(V_chem_max-V_ovp)/V_chem_max

Step 4: Calculate SOH as ratio of stabilized discharge capacity to rated capacity

Formula100*C_rest/C_rated

Step 5: Assign grade level based on SOH numeric threshold bands

Manual Workflow
If SOH ≥ 97.0 → G = 1 (Grade A); else if SOH ≥ 94.0 → G = 2 (Grade B); else → G = 3 (Grade C). Strict inclusive lower bounds, exclusive upper bounds per ANSI/ISO/IEC 17020 grading rules.

Step 6: Compute fault tolerance percentage from observed graceful degradation count

Formula100*N_grace/N_err

UNDERSTANDING THE RESULTS

PASS
A proven validation criterion passed. The engineering input satisfies the deterministic threshold.
FAIL
A proven validation criterion failed. The engineering input does not satisfy the deterministic threshold.
CALCULATED
A deterministic calculation completed, but no acceptance criterion exists for this step. CALCULATED does NOT mean PASS.
RESULT NOT VALID
Runtime executed but engineering validity requirements were not met.
INCOMPLETE
Required inputs or workflow steps are incomplete.

The overall decision reflects only validation steps. Calculation steps produce numerical results without pass/fail claims.

WHEN TO USE THIS TOOL

  • When deterministic Battery Grading System engineering verification is needed for project-specific conditions.
  • For calculation of Compute max allowable voltage deviation based on grade tier (Step 1).
  • For calculation of Calculate actual cell voltage deviation from measurement set (Step 2).
  • For calculation of Compute percentage safety margin between BMS trip point and chemistry limit (Step 3).
  • For calculation of Calculate SOH as ratio of stabilized discharge capacity to rated capacity (Step 4).
  • For validation of Assign grade level based on SOH numeric threshold bands (Step 5).
  • For calculation of Compute fault tolerance percentage from observed graceful degradation count (Step 6).
  • For deterministic pre-checks before formal engineering review or submission.

When NOT to use this tool: This tool does not replace laboratory testing, formal engineering analysis by a licensed professional, or code-compliance certification. It performs deterministic threshold comparison and calculation only.

ENGINEERING FAQ

What does this verification tool check?

This tool performs 6 deterministic engineering steps: (1) Compute max allowable voltage deviation based on grade tier, (2) Calculate actual cell voltage deviation from measurement set, (3) Compute percentage safety margin between BMS trip point and chemistry limit, (4) Calculate SOH as ratio of stabilized discharge capacity to rated capacity, (5) Assign grade level based on SOH numeric threshold bands, (6) Compute fault tolerance percentage from observed graceful degradation count.

What does a PASS result mean?

A PASS result means the validation step's deterministic threshold comparison was satisfied. It does not constitute laboratory certification or code compliance.

What does a CALCULATED result mean?

A CALCULATED result means the deterministic calculation completed, but no acceptance criterion is applied to this step. CALCULATED does NOT mean PASS.

What is not currently verified by this workflow?

Capabilities not currently verified include: Cell_voltage_deviation_monitoring_and_convergence_timing, SOC_estimation_accuracy_quantification, Grade_A_capacity_deviation_evaluation, EIS_based_SOH_estimation.

How many steps are golden verified?

0 out of 6 steps have been verified with deterministic golden test cases.

COMPONENT TOOLS

This workflow currently contains no bound executable Small Tools. Steps are defined by engineering methods and reference materials.

CalculationWorkflow StepDetermine cell-level voltage imbalance threshold for Grade A balancing verification
CalculationWorkflow StepDetermine cell-level voltage imbalance threshold for Grade A balancing verification
CalculationWorkflow StepValidate BMS overvoltage protection trip margin relative to cell chemistry limit
CalculationWorkflow StepDetermine SOH grade assignment from formation-cycle capacity retention
ValidationWorkflow StepDetermine SOH grade assignment from formation-cycle capacity retention
CalculationWorkflow StepQuantify CAN bus fault tolerance via controlled error frame injection success rate

RELATED ENGINEERING WORKFLOWS

Integrated Engineering Framework for Lithium-Ion Battery Grading in Industrial Sorting LinesDevelop Site Acceptance Testing (SAT) Plans for Industrial Battery Grading SystemsCommissioning of Automated Battery Grading SystemsCell Balancing Verification for Lithium-Ion Battery Grading System