Yongrui Intelligent Technology Dongguan Co., Ltd.

The BMU-to-battery pack communication harness is a key component in new energy vehicles and energy storage systems. It primarily connects the battery management system (BMS) to the battery module, transmitting critical data such as voltage, temperature, and current. This type of harness typically utilizes shielding (such as aluminum foil or braided mesh) to reduce electromagnetic interference. It also features high-temperature resistance (-40°C to 125°C) and waterproofing (IP67/IP69K), ensuring stable operation in challenging environments. Its construction includes multi-core shielded cable (such as a twisted-pair CAN bus cable), high-voltage/signal connectors (such as TE and Molex), and protective materials (corrugated tubing, heat shrink tubing). Technical specifications include operating voltage (12V to 1000V) and vibration resistance (compliant with ISO 16750). Length and branching must be customized based on the specific battery pack layout. Pricing varies significantly depending on configuration: low-voltage signal harnesses range from approximately US$10 to US$50 per set, while high-voltage versions (including shielding and high protection) can cost US$50 to US$200 per set (based on orders of 1,000 sets). When purchasing, it is necessary to clarify the communication protocol (such as CAN 2.0B), interface definition and certification requirements (such as INMETRO is required for export to Brazil).