Advanced Electronic Control Units (ECUs)

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Technical Overview

The Advanced Electronic Control Unit (ECU) is the core processor for the power step system, distinguished by its multi-protocol compatibility (CAN-Bus, LIN-Bus, Door Latch), redundant safety logic, and low quiescent current consumption. The unit utilizes an automotive-grade microprocessor that executes a complex algorithm for motor deployment profile (acceleration/deceleration dampening) and continuously monitors motor current signatures for immediate anti-pinch detection and auto-stop.

The hardware is enclosed in a sealed, IP67-rated enclosure and features built-in protection against reverse polarity, over-voltage spikes, and short circuits, ensuring system longevity and vehicle electrical protection.

Introduction

The performance and safety of an electric step system are fundamentally determined by the precision of its Electronic Control Unit. Our ECUs are intelligent, robustly protected, and engineered to communicate seamlessly with complex modern vehicle electronics, providing rapid, safe, and efficient control of the mechanical system.

Bohai Automotive Technology Co., Ltd. invests heavily in electronic R&D, developing proprietary firmware that ensures non-invasive integration across a wide range of vehicle makes and models, guaranteeing error-free communication and long-term reliability.

Applications

Multi-Brand Accessory Supply: Used by distributors who require a single, flexible control platform compatible with diverse vehicle models (e.g., Mercedes, Haval, BMW).
Safety-Critical Systems: Essential for accessories sold in markets with stringent safety regulations (e.g., Europe, North America).
Hybrid/Electric Vehicles: The ultra-low quiescent current draw is crucial for vehicles where battery longevity and power management are primary concerns.
Custom Vehicle Builders: Providing a programmable, advanced control unit for highly customized or low-volume vehicle conversion projects.

Specification

Microprocessor	Automotive-Grade Microcontroller (High Processing Speed)
Safety Logic	Anti-Pinch (Current-Sensing & Positional)
Quiescent Current	<5 mA (Ultra-Low Standby Draw)
Communication	CAN/LIN Bus Read-Only Compatibility
Operating Voltage	9V to 16V (Wide Range Stability)
Protection Features	Short Circuit, Over-Voltage, Reverse Polarity
Enclosure Rating	IP67 Sealed and Water/Dust Proof

Common Questions

Q: What is the primary difference between a simple relay controller and an advanced ECU?
A: A relay controller simply opens and closes a circuit, lacking any safety or logic functions. An advanced ECU processes multiple vehicle inputs, controls motor acceleration/deceleration, executes anti-pinch logic, and manages power consumption with precision.

Q: Is the ECU durable enough to be mounted outside the cabin, near the wheel well?
A: Yes. The IP67-rated enclosure and automotive-grade components are specifically designed to withstand the humidity, extreme temperatures, vibration, and occasional water submersion of an undercarriage installation.

Q: How does the ECU manage motor speed and noise?
A: The ECU uses Pulse Width Modulation (PWM) to precisely control the voltage supplied to the motor, allowing for a smooth acceleration and deceleration profile that dampens mechanical shock and significantly reduces operational noise.

Core Features

Non-Invasive Communication: The read-only CAN-Bus capability ensures the unit accesses necessary signals without writing data back to the vehicle, maintaining system integrity.
High-Speed Safety Reaction: Continuous current monitoring enables the ECU to detect an obstruction and initiate a soft-stop in milliseconds, providing superior anti-pinch safety.
Energy Efficiency: The ultra-low quiescent current draw minimizes the battery load when the vehicle is parked, preserving battery health, especially in modern start/stop vehicles.
Firmware Flexibility: The unit can be easily updated or re-programmed with model-specific firmware to match new vehicle protocols or integrate custom features.

Manufacturing & Customization

Manufacturing involves Automated SMT (Surface-Mount Technology) for precise component placement. Every ECU undergoes a Function and Communication Test on a Hardware-in-the-Loop (HIL) simulation bench to verify all safety and logic functions before sealing.

Customization Opportunities: Focused on electronic needs:

Client-Specific Firmware: Developing custom firmware that includes unique activation logic, speed settings, or diagnostic codes required by a client.
Protocol Integration: Custom engineering the CAN-Bus module to integrate with niche vehicle communication protocols not supported by the standard unit.
Custom Connector Solutions: Providing customized wiring harnesses with specific OEM-style connectors that plug directly into the vehicle's factory wiring.

Material Selection

The housing is typically High-Density, Glass-Filled, Flame-Retardant Polymer, chosen for its impact resistance and thermal stability.

The internal circuit board features Conformal Coating (a thin polymer film) for enhanced protection against moisture and environmental contaminants.

Connectors are Sealed, Multi-Pin Automotive Connectors (e.g., Deutsch or AMP style) that ensure a vibration-proof and secure electrical connection.

about Bohai

R&D and manufacturing of mid-to-high-end SUV electric pedals.

Bohai Automotive Technology (Zhejiang Huzhou) Co., Ltd. was established in 2014. It is a technology-based enterprise specializing in R&D China Advanced Electronic Control Units (ECUs) Manufacturers and Wholesale Advanced Electronic Control Units (ECUs) Suppliers The company is located on the southern bank of the beautiful Taihu Lake in the hinterland of the Yangtze River Golden Triangle-Changxing County, Huzhou City, Zhejiang Province. It is about 150 kilometers away from Shanghai, Hangzhou, Nanjing, Ningbo, Suzhou, Wuxi and other large and medium cities.

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