IDTA-02035-1 : Digital Battery Passport – Part 4 Technical Data v1.0.1: Clarification on 20% and 80% SoC requirements for OriginalPowerCapability

[aditya-work-dev]

Background:
For OriginalPowerCapability, the specification states that power capability measurements for EV and industrial batteries must include measurements at both 80% and 20% state of charge

The corresponding PowerCapabilityAt element has cardinality [1..*], allowing one or more measurements. However, its description says that a reference condition can be, for example, 80% or 20% SoC.

Finally, the atSoc property again states that measurements must include 80% and 20% SoC for EV and industrial batteries, while the provided JSON example contains only the value 80.

Observation:

There appear to be two ambiguities:

1. AND vs OR
OriginalPowerCapability and atSoc state that measurements must include 80% AND 20% while the description of PowerCapabilityAt refers to: 80% OR 20%

2. Cardinality for PowerCapabilityAt currently has [1..*]
If both 20% and 80% measurements are mandatory for EV and industrial batteries, at least two entries would be needed:
For Example:
OriginalPowerCapability
├── PowerCapabilityAt
│ └── atSoc = 20
└── PowerCapabilityAt
│ └── atSoc = 80

Should the cardinality therefore be changed to accept the above scenario or remain [1..*] and the requirement for 20% and 80% be expressed as a conditional validation rule for EV and industrial batteries?

Possible clarification:

1. If both measurements are intended to be mandatory, it may be helpful to make the AND requirement consistent across the descriptions.
2. Updating the example to contain both atSoc = 20 and atSoc = 80, if the decision is made to make those two values compulsory.
3. Considering the perspective of validation, how this conditional requirement should be represented and validated?

[Rudra-sandeep]

@aditya-work-dev Thank you for raising the issue we will forward it to the WG