![]() ![]() The complex wiring from module to module is done manually today and involves working in a high voltage environment. ![]() Not only that, but a wireless BMS will also have an impact during an EV’s manufacture, by reducing assembly costs. In a wireless scenario you can establish a direct link from the battery management unit (BMU) to each wireless node, and that greatly improves the reliability of the complete system.” ![]() Steinmetz added: “TI’s solution provides a direct cost reduction of the battery management system - reducing the complexity of the design by simplifying the wiring harness, removing cables, and the isolation connectors. In comparison the TI solution for wireless battery management enables a reduced total cost of ownership of the complete battery in a hybrid electric vehicle or electric vehicle. That makes warranty repairs, cable failures, and battery replacement super expensive.” “On top of that, the wiring harness and connectors are quite a common source of cable failures, and it’s the number one reason for field returns. “This standard set-up requires a lot of complex wires, connectors, and isolation components, such as high voltage capacitors and transformers,” commented Karl-Heniz Steinmetz, General Manager for Worldwide Automotive Powertrain at TI. Every battery cell must be connected by cabling to a monitor, which regulates energy performance, and the heavy-duty copper wire, which is required to make the cabling more reliable, produces a bulky labyrinth of battery management cabling. This can be connected in a ring architecture for reliable communication, even in the event of a cable break. Functional safety is of major importance and safety requirements for a BMS are rigorous, and so need to be ASIL D compliant and support a single twisted pair interface. Today’s battery monitors are connected with a daisy chain communication interface. Wired vs wirelessĪ traditional BMS solution is wired. So, what if that burden of weight on the BMS could be removed and the system could be operated wirelessly? TI’s new next-gen wireless BMS solution eliminates the need for bulky communications wiring, in turn creating new and easier design opportunities, and ultimately, improving drive range and reliability for EVs worldwide. ![]()
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