What are the consequences of a BCU failure in Sinotruk vehicles?
2 Answers
Automotive BCU failure refers to a malfunction in the Battery Control Unit, while BMU failure indicates an issue with the Battery Management Unit. These two control modules complement each other. Below is a detailed introduction to these two units: BCU: It collects and reports real-time data on individual battery cell voltages and temperature information, provides feedback on the SOH and SOC of each battery string, and features active/passive balancing circuit functions, effectively ensuring the consistency of battery cells during power usage. BMU: It processes information reported from controllers and high-voltage controllers, determines and controls the operational status of the power battery based on the reported data, manages charge/discharge control, implements BMS-related control strategies, and performs corresponding fault diagnosis and handling.
I've been driving Sinotruk heavy-duty trucks for over a decade, and BCU failures are a real headache. Last time it happened, the truck just stalled and couldn't move, costing me thousands in towing fees. It manages battery operations, and when it fails, the battery charges erratically, leading to overheating, fire risks, or power loss. Long-haul trips often end with breakdowns, causing massive delivery delays and losses. Repairs are tough—requiring full module replacements with expensive parts that need professional handling. Regular battery maintenance and dashboard light checks are crucial—prevention beats emergency fixes. Highway failures are especially risky; safety comes first. I recommend regular system diagnostics and avoiding cheap, low-quality parts. Sharing this experience to help newcomers avoid major pitfalls.
