Texas Instrument on Thursday unveiled its wireless battery management system (BMS) concept at an online press conference in South Korea.
The company is aiming to commercialize the solution in 2024.
Texas Instrument will be supplying its Simplelink CC2662R-Q1 wireless microcontroller unit (MCU), BQ79616-Q1 battery monitoring IC, Simplelink wireless BMS software development kit and Simplelink wireless BMS evaluation module CC2662RQ1-EVM-WBMS for the solution.
Park Seo-min, Automotive Regional Sales Director at Texas Instruments Korea, said the company was in positive talks with multiple automobile companies to supply the BMS solution.
Launch will depend on the schedule of automobile manufacturers but cars with the wireless BMS solution may launch after three years at the earliest, the director said.
Texas Instrument applied its own wireless protocol to the BMS. The protocol supports 99.999% network availability and 300ms speed. The company stressed that protocol can protect from data loss and damages. Accuracy between batter cells is ±2mV. Network packet error rate is below 10-7.
It will also offer key switch and update, native device authentication, debug security, software IP protection through JTAG (Joint Test Action Group) standard and 128bit AES specification.
When a car is driving within a city, Wi-Fi from offices, Bluetooth from music players of those passing by may cause RF interference, Park said. That is why Texas Instrument developed its own optimized protocol instead of using Bluetooth, ZigBee or IEEE 802.15.4, the director added.
The company’s BMS doesn’t require cables which reduces components in automobiles, lowering their weight. This increase fuel efficiency. Wired BMS solution, to reduce noise, used isolation components between the CPU and batter cells. They also used copper wire cables that have high reliability but increased volume and weight.
Texas Instrument’s wireless BMS solution also offers scalability for its system level architectures through multiple platforms. Automobile makers can use one system-on-a-chip to connect with multiple batter monitoring devices and make modules in 32, 48 to 60 cell systems. This system supports up to 100 nodes. Each node has a delay time less than 2ms. The company said it has received ASIL D certificate of TUV SUD’s ISO 26262 standard.
The company’s Simplelink CC2662R-Q1 wireless MCU costs US$2.79 per a thousand units. BQ79616-Q1 battery monitoring IC costs US$6.90 per a thousand units. Simplelink BMS software development kit will cost US$999. Simplelink wireless BMS software development kit is free.