TRUCK TCU
The BMS-native data gateway purpose-built for heavy-duty electric truck fleets. Deep battery intelligence that no generic telematics unit can deliver.
HEAVY-DUTY ELECTRIC TRUCKS
BMS PACKS
DEEP SLEEP
CAN FD
LIFETIME
SEALED
SYSTEM ARCHITECTURE
LEVEL 3 IN THE
BATTERY HIERARCHY
The Truck TCU sits above pack-level BMS controllers, aggregating multi-pack data and providing the sole cloud connectivity layer. All safety-critical functions remain at Level 2 — the TCU operates as QM with full freedom-from-interference.
CLOUD
BATTERY-IN-THE CLOUD
Fleet analytics, digital twin, campaign management
LEVEL 3 — TRUCK TCU
MULTI-PACK GATEWAY
Cloud connectivity, OTA, diagnostics, measurement jobs
LEVEL 2 — BARCELONA BMS
PACK-LEVEL CONTROL
Safety (ASIL C/D), contactor management, balancing
LEVEL 1 — CMBS
CELL MONITORING BOARDS
Cell voltage & temperature measurement
CORE CAPABILITIES
FLEET-WIDE BATTERY
INTELLIGENCE
Purpose-built to deliver deep BMS domain knowledge — measurement jobs, battery digital twins, and predictive SOH — that no generic TCU can provide.
MULTI-PACK AGGREGATION
Connects up to 8 Barcelona BMS packs via CAN FD with auto-discovery. Aggregates SOC, SOH, voltage, current, and temperature.
AUTOMOTIVE CYBERSECURITY
UN R155, UN R156 compliant. TPM 2.0 secure boot, TLS 1.3, UDS security access, intrusion detection.
GATEWAY OTA FLASHING
Orchestrates downstream BMS firmware updates over CAN FD. A/B bank flashing, per-ECU tracking, automatic rollback.
BATTERY-IN-THE-CLOUD
MQTT 5.0 telemetry over TLS 1.3. Feeds battery digital twins with real-time and buffered data. Remote diagnostics.
MEASUREMENT JOBS
Dynamically configurable signal logging deployed OTA from Battery-in-the-Cloud. Trigger by threshold, time, event, or continuous.
INTELLIGENT SLEEP / WAKE
Four power states from active (500 mA) to ultra-low-power (<100 µA). Wake-on-CAN, cellular, ignition, or timer.
CORE DIFFERENTIATOR
MEASUREMENT JOB
FRAMEWORK
Deploy dynamically configurable signal logging jobs over-the-air to individual trucks or entire fleet segments.
FLEET SOH CAMPAIGN
Daily SOC/SOH snapshots across 1,000 trucks for aging model training
THERMAL INVESTIGATION
High-rate temperature logging on specific VINs after field report
PRE-RECALL DIAGNOSTICS
Targeted measurement to affected VINs before issuing recall
CELL BALANCING ANALYSIS
Cell-level voltage spread during charge cycles across fleet
TECHNICAL DETAILS
BUILT FOR THE ROAD
Automotive-grade engineering. ISO 16750 environmental qualification, E-Mark type approval, 15-year design lifetime.
| Processor | Quad-core Cortex-A53, 1.0 GHz+ (non-Chinese SoC) |
| Memory | 1-2 GB LPDDR4 RAM, 16-32 GB eMMC, optional 32 GB SD |
| Security | TPM 2.0 (Trusted Platform Module) |
| Operating Temp | -40°C to +85°C (ISO 16750-4) |
| Ingress | IP67 sealed, conformal coated |
| Dimensions | ~150 x 100 x 40 mm |
| Power | 9-32 VDC (24V truck bus), ISO 16750-2 transient protection |
| Draw | Active ≤500 mA · Idle ~100 mA · Sleep <1 mA · Ultra-low <100 µA |
| Shutdown | Supercapacitor (~10F) — 10s orderly shutdown |
| Sensors | 6-axis IMU, battery-backed RTC |
| Lifetime | 15 years |
| CAN FD | 2 channels — 5 Mbit/s + 500 kbit/s legacy, galvanically isolated |
| Cellular | 4G LTE Cat-4 (minimum), 5G-ready module slot |
| GNSS | GPS + GLONASS + Galileo, A-GNSS, <3m accuracy |
| eSIM | eUICC (eSIM) + nano-SIM slot |
| WiFi | 802.11 b/g/n/ac (2.4 + 5 GHz) |
| Bluetooth | BLE 5.0+ |
| Ethernet | 100BASE-T1 automotive |
| USB | USB-C — debug + offline update |
| Antenna | 2x SMA/FAKRA (cellular + GNSS) |
| I/O | 2-4 analog in, 2 digital out, 2-4 digital in |
| OS | Linux (Yocto), read-only SquashFS, A/B partitioned |
| Containers | Docker / Podman runtime |
| Boot | <60 seconds to operational |
| BMS Protocol | UDS/ISO-TP over CAN FD (ISO 14229 / ISO 15765) |
| Cloud | MQTT 5.0 over TLS 1.3, Protobuf/CBOR |
| OTA | A/B partitioning, signed images, auto rollback, USB fallback |
| Gateway Flash | UDS flashing to downstream BMS, multi-ECU |
| Logging | 100 ms sampling, event ring buffer (1 min pre + post), LZ4/zstd |
| Config | JSON calibration files, OTA or USB deployable |
| Time Sync | GNSS → NTP → NITZ → RTC fallback |
| Safety | ISO 26262 QM, freedom-from-interference to ASIL-rated BMS |
| Cybersecurity | UN R155 (CSMS), UN R156 (SUMS), ISO/SAE 21434 |
| EMC | CISPR 25, ISO 11452, ISO 7637-2/-3, E-Mark (ECE R10) |
| Environmental | ISO 16750-2/-3/-4 |
| Radio | RED Directive (2014/53/EU) |
| Type Approval | E-Mark (EU vehicle component) |
| Security | TPM 2.0 secure boot, TLS 1.3, DTLS 1.3, UDS Security, IDS |
| Keys | HSM-backed, X.509 per-device certs, eSIM-bound identity |
READY TO CONNECT YOUR FLEET?
The Truck TCU is currently in concept stage. Let's discuss how BMS-native fleet intelligence can transform your electric truck program.