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Hydrogen Fuel Cell Control
Introduction
Based on Huahai Technology's RapidECU all-domain electronic control development platform, this solution addresses industry pain points of hydrogen fuel cell systems — unstable supply air pressure, low temperature/humidity control precision, hydrogen leakage risk, poor start-stop durability, lagging dynamic response, complex fuel-cell/lithium-battery hybrid coupling, difficult cold start and poor degradation consistency — delivering a professional overall Hydrogen Fuel Cell Control Unit (FCU) solution. The solution core implements full-chain management of stack status monitoring, hydrogen supply control, air system regulation, water-circulation thermal management, humidity balance control, generation power calculation, fault safety protection and multi-energy coordinated dispatch, precisely fitting the special fuel cell operating mechanism of power generation through chemical reaction without combustion. Backed by a full proprietary toolchain — ECUCoder automatic code generation, MeCa dedicated calibration tools, SimCar fuel-cell-dedicated HIL simulation and SimCore hydrogen system virtual simulation — it is fully compatible with MATLAB/Simulink model-based development, supports the AUTOSAR architecture and the ISO 26262 functional safety system, and adapts to all categories of pure hydrogen fuel, hydrogen-electric hybrid and range-extender hydrogen platforms. It covers the full lifecycle of prototype algorithm validation, bench commissioning, vehicle matching calibration and mass production, effectively improving fuel cell system generation efficiency, start-stop life, low-temperature adaptability and vehicle operational safety.
Scheme architecture diagram

Four-layer full-stack hydrogen fuel cell control system architecture

Plain Text
┌─────────────────────────────────────────────────────────┐
│ Top Development Tool Layer (Full-chain Closed Loop) │

│ ECUCoder code generation | MeCa X hydrogen calibration │

| SimCar fuel-cell HIL   │
│ SimCore hydrogen system simulation | Bus recorder   │

| EOL production-line test equipment        │
├─────────────────────────────────────────────────────────┤
│ Middleware Software Layer (Fuel Cell Control Core) │
│ Hydrogen supply pressure closed-loop control |

| Precise air compressor control  |

| Stack temperature & humidity management  |

| Water circulation & cooling strategy  |

| Dynamic power-generation calculation |

| Hydrogen-electric coordinated energy management |

| Hydrogen leak monitoring & protection  |

| Start/stop durability control  |

| Fault diagnostics & fault-tolerant degradation├─────────────────────────────────────────────────────────┤
│ Hardware Layer (Dedicated Fuel Cell Controller Platform) │
│ F3 fuel-cell main controller  |

| U34 hydrogen-electric full-domain coordination controller |

| High-precision pressure/temperature/humidity acquisition |

| High-speed actuator PWM drive    |

| Dedicated hydrogen monitoring interface   |

| CAN FD/Ethernet communication  |   

| Explosion-proof wide-temperature hardware design |├─────────────────────────────────────────────────────────┤
│ Vehicle Application Layer (Full-domain Hydrogen Control) │
│ Fuel-cell steady-state generation   |

| Dynamic power following the load    |

| Reliable low-temperature start control    |

| Hydrogen-lithium battery coupling & coordination   | 

| Optimal vehicle energy consumption    |

| Full-domain hydrogen system safety protection  |└─────────────────────────────────────────────────────────┘

System interconnection logic

Hydrogen pressure sensors, air compressor, water pump valve groups, temperature/humidity sensors and hydrogen concentration sensors → fuel cell control unit (condition calculation, gas-path regulation, thermal management closed loop, power dispatch) → cross-domain coordination with the vehicle central domain, BMS battery system, powertrain domain and thermal management domain. The upper-computer toolchain completes the full closed loop of hydrogen-energy strategy modeling, automatic code generation, fuel cell system HIL simulation, vehicle energy calibration, production flashing and fault diagnostics.


Functional Features

1. Precise closed-loop control of full stack status 

It achieves real-time acquisition and closed-loop control of all fuel cell stack parameters — voltage, current, temperature, humidity, hydrogen pressure and air pressure — precisely matching the stack's optimal operating range, effectively avoiding abnormal conditions such as single-cell undervoltage, over-temperature, stack drying and flooding, and ensuring long-term stable and efficient stack power generation.

2. Dynamic coordinated control of the gas-path system
Finely regulating the full process of hydrogen injection, recirculation, purging, air compression and intake dehumidification, it dynamically adjusts the hydrogen-air ratio according to vehicle load, achieving an adaptive strategy of stable pressure at low load and improved efficiency at high load, solving the large pressure fluctuation and unstable generation efficiency of traditional hydrogen systems.

3. All-domain integrated thermal-humidity

management. Linking water circulation, cooling fans, dehumidification valve groups and heating modules, it achieves low-temperature stack preheating, high-temperature cooling and balanced humidity control, precisely solving industry pain points such as difficult cold start in winter, too-fast high-load temperature rise and condensation accumulation on condition switching, greatly improving all-weather condition adaptability.

4. Coordinated hydrogen-electric hybrid energy
Deeply matched with the lithium battery energy storage system, it realizes a coordinated strategy of steady fuel cell generation with dynamic peak shaving and valley filling by the battery: battery drive at low speed, hydrogen-electric coordination at high speed, and efficient idling charging, avoiding frequent load changes and start-stops of the fuel cell and effectively extending stack life.

5. Multi-level hydrogen energy safety protection
 Equipped with hydrogen concentration monitoring, abnormal pressure protection, over-temperature/overload protection, leakage warning and emergency shutoff logic, it provides tiered fault warning, power derating and emergency shutdown closed-loop capability, comprehensively avoiding safety risks such as hydrogen leakage, over-pressure and thermal runaway, and meeting hydrogen vehicle safety regulations.

6. Model-based development and full-scenario simulation
Hydrogen supply, thermal-humidity management, energy dispatch and fault protection strategies are quickly built on Simulink, and ECUCoder generates automotive-grade production code with one click. The dedicated fuel cell HIL bench simulates extreme conditions such as high/low temperature, varying load, gas-path faults and leakage anomalies for strategy iteration and reliability validation, greatly reducing real-machine test risks and costs.


Advantages of the plan

1. Dual improvement of generation efficiency and stack life      

Precise hydrogen-air ratio, thermal-humidity closed loop and smooth load-change strategies effectively improve fuel cell generation efficiency and reduce stack degradation, minimizing damaging conditions such as flooding, drying and thermal shock; compared with traditional control solutions, stack cycle life and overall system energy efficiency are significantly improved.

2. Self-controlled hydrogen energy core technology
  Fuel cell control strategies, gas-path algorithms, thermal-humidity management, hydrogen-electric coordination and safety protection logic are all developed in-house; the full toolchain has no overseas licensing binding, with fully open low-level code, enabling independent iteration of hydrogen electronic control core algorithms and breaking foreign monopolies in hydrogen electronic control technology.

3. Efficient development iteration and multi-scenario deployment
 With reusable same-source software and hardware and full upfront MIL/SIL/HIL verification, the vast majority of condition matching and strategy optimization is completed on virtual benches without repeated real-machine debugging, greatly shortening hydrogen vehicle calibration and mass production cycles.

4. Full-condition adaptation solving hydrogen industry pain points
 Targeted optimization of core problems such as low-temperature cold start, heavy-load dynamic response, idling inefficiency and unstable condition switching adapts to complex conditions including severe cold, high temperature, heavy load and long-distance continuous operation, comprehensively improving the all-weather operation capability of hydrogen equipment.

5. Smooth hydrogen-electric coupling for a better vehicle experience
Refined hydrogen-electric energy allocation strategies avoid power output jerk and power lag, achieving linear vehicle power output and smooth condition switching, balancing dynamic performance, economy and ride comfort.

6. Fully meeting automotive-grade mass production standards
Strictly following the IATF 16949 automotive quality system and ISO 26262 functional safety development process, it supports the full set of DV/PV high/low temperature, vibration, endurance, explosion-proof and fault-injection tests for the fuel cell system, directly satisfying OEM mass-production audit standards for hydrogen models.


Success Case
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