Developed in-house by HECC, our proprietary OBD2 software goes where no off-the-shelf tool can. It measures the real capacity and precise state of health of hybrid and electric vehicle batteries — producing strictly tamper-proof data for certification of absolute impartiality.
Unlike generic OBD2 scanners, our software communicates directly with the battery management unit (BMU/BMS) via the vehicle's CAN bus. It accesses raw cell-level data — individual voltages, temperatures, charge and discharge currents — bypassing the manufacturer software filters that truncate or smooth the information.
Standard tools display SOC (State of Charge) — what remains in the battery at a given moment. HECC measures SOH (State of Health): the maximum capacity the battery can still deliver, compared to its original capacity. It is the difference between knowing a glass is half full, and knowing the actual size of the glass. This figure determines real-world range, the vehicle's residual value, and whether battery replacement is warranted.
This is the heart of HECC's innovation. Every diagnostic session is timestamped, cryptographically signed, and transmitted in real time to our secured servers. The technician performing the test has no access to measurement parameters or raw results before validation. It is technically impossible for them to influence the figures — whether to favour a seller, a buyer, or their own commercial interests. The software is the judge, not the operator.
In most workshops, the same technician sells the part and evaluates the battery. At HECC, assessment is architecturally separated: diagnostic data passes through a central server before anyone can access it. This structural compartmentalisation makes any collusion technically impossible. This is what distinguishes a HECC opinion from a simple workshop recommendation.
Commercial OBD2 tools rely on standardised OBD-II protocols (SAE J1979, ISO 15765), designed for emissions and mechanical diagnostics — not for fine-grained high-voltage battery analysis. HECC has developed its own communication protocols specific to Toyota Hybrid System (THS) architectures, enabling direct interrogation of internal BMU registers that standard tools simply cannot reach.
A hybrid battery is not a monolithic block. It is composed of dozens to several hundred cells arranged in series and parallel. A single failing cell degrades the entire module. Our software analyses the voltage, internal resistance, and thermal drift of each cell individually, identifying localised weaknesses invisible to a global diagnostic. This level of granularity is what makes the HECC certificate actionable and defensible.
At the end of each diagnostic, the software automatically generates a structured certificate: SOH as a percentage, residual capacity in kWh, cell imbalance, thermal history, and a unique verification code. The certificate is available online via QR code, accessible to the buyer, seller, or any authorised third party. It is digitally signed and cannot be modified after issuance. It is a document with evidentiary value, not a simple data sheet.
All diagnostic data is encrypted in transit (TLS 1.3) and at rest (AES-256). Each session is linked to a vehicle identifier (VIN), a technician identifier, a GPS location, and a precise timestamp. This traceability chain provides a complete technical history of each diagnostic — a useful reference for monitoring battery health over time.
The HECC software is not a static product. Every new vehicle model integrated, every field report from certified technicians, every evolution of certification standards enriches the database and refines the measurement algorithms. The long-term goal: to cover the full hybrid and electric fleet sold in Southeast Asia, and to establish a regionally recognised certification reference.