New high-voltage ASIL D-compliant,
high-precision battery monitors improve range estimations with the
highest accuracy possible
DALLAS, Jan. 4, 2023
/PRNewswire/ -- Texas Instruments (TI) (Nasdaq: TXN) today
introduced new automotive battery cell and pack monitors with the
most accurate measurement capability available on the market,
maximizing electric vehicle (EV) drive time and enabling safer
operation.
As EVs grow in popularity, advanced battery management systems
(BMS) are helping overcome critical barriers to widespread
adoption. With a focus on solving complex system design challenges,
TI provides the most advanced, comprehensive portfolio of BMS
devices, enabling automakers to create a safer, more reliable
driving experience and accelerate EV adoption.
The BQ79718-Q1 battery cell monitor and BQ79731-Q1 battery pack
monitor are the newest products in TI's comprehensive BMS offering.
The BQ79731-Q1 and BQ79718-Q1 devices provide an unprecedented
level of accuracy and precision in measuring battery voltage,
current and temperature to effectively determine the true range of
a vehicle and increase the overall life and safety of the battery
pack.
"Automakers aim to get the most range possible out of their EVs,
and accurate state-of-charge estimations are vital to achieve
this," said Sam Wong, general
manager for BMS at TI. "Our new devices bring substantially higher
precision to voltage and current measurement, giving automakers
confidence to accurately measure an EV's true range."
TI will demonstrate its BMS technology featuring the new
BQ79718-Q1 and BQ79731-Q1 devices at CES 2023. Visit ti.com/ces for
more information.
Effectively increase drive range
with the industry's leading precision
As consumers turn to EVs, accuracy and precision in measuring
battery voltage have become critical to a consumer's driving
experience. Even a slight change in temperature can have a
significant impact on an EV's range; and colder weather, in
particular, can impact battery range by up to 40%. Such variations
can create considerable uncertainty in battery voltage and expected
EV range.
The BQ79718-Q1 allows automakers to maximize the true range of
their EV with high-performance battery cell voltage measurements
down to 1 mV of accuracy, and the BQ79731-Q1 allows measurement of
the battery pack current down to 0.05% of accuracy. These
innovations will provide the clearest picture possible to measure
accurate state of charge and state of health at the individual cell
and pack level, effectively reflecting true remaining mileage and
instilling confidence in the battery life of their EV.
Enhance state-of-charge
estimations with pack voltage and current synchronization
In addition, industry-leading voltage and current
synchronization (64 µs) enables instantaneous monitoring of battery
pack power, providing a real-time snapshot of battery health. This
level of synchronization enables electrochemical impedance
spectroscopy, which provides vital insight into the cell core
temperature, battery aging and state of charge of the battery. Read
the technical article, "How to design an intelligent battery
junction box for advanced EV battery management systems."
Enable higher levels of safety and
performance with holistic BMS offering
The BQ79718-Q1 battery cell monitoring integrated circuit
achieves an unprecedented Automotive Safety Integrity Level (ASIL)
accuracy (main path, redundant path and residual error seeking)
giving automakers the ability to charge and discharge a vehicle
battery pack beyond any cell monitor previously on the market.
The BQ79718-Q1 battery cell monitor and BQ79731-Q1 pack monitor
join TI's portfolio of high-precision battery monitors and
balancers. Additionally, the family includes the BQ79600-Q1
SPI/UART communication bridge device, which enables reliable
and fast daisy-chained communication using an isolated
communication protocol.
This family adds to TI's holistic offering for BMS, which also
includes the CC2662R-Q1 wireless microcontroller (MCU) for wireless
BMS, TPSI3050-Q1 isolated switch driver and TPSI2140-Q1 isolated
switch device. TI also provides a BMS design suite that includes a
reference board, emulator and Automotive Open System Architecture
complex device driver.
TI remains committed to driving vehicle electrification forward
by helping automakers optimize vehicle performance, accelerate
development and create safer, more reliable and affordable EVs.
Package, availability and
pricing
Automakers can jump-start their designs by purchasing the
battery cell monitor BQ79718-Q1 evaluation module (BQ79718EVM-049),
which is available on TI.com for US$399. The 18-channel BQ79718-Q1 comes in a
10-mm-by-10-mm, 64-pin thermally enhanced thin quad flat package
(HTQFP), and is priced at US$8.39 in
1,000-unit quantities.
Also available is the battery pack monitor BQ79731-Q1 evaluation
module (BQ79731Q1EVM-060), which is available on TI.com for
US$199. The battery pack monitor
BQ79731-Q1 comes in a 7-mm-by-7-mm, 48-pin thermally enhanced thin
quad flat package (HTQFP), and is priced at US$8.39 in 1,000-unit quantities. All products
featured for BMS are immediately available for purchase on
TI.com.
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About Texas Instruments
Texas Instruments Incorporated (Nasdaq: TXN) is a global
semiconductor company that designs, manufactures, tests and sells
analog and embedded processing chips for markets such as
industrial, automotive, personal electronics, communications
equipment and enterprise systems. Our passion to create a better
world by making electronics more affordable through semiconductors
is alive today, as each generation of innovation builds upon the
last to make our technology smaller, more efficient, more reliable
and more affordable – making it possible for semiconductors to go
into electronics everywhere. We think of this as Engineering
Progress. It's what we do and have been doing for decades. Learn
more at TI.com.
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SOURCE Texas Instruments