As the primary intelligence layer within a high-voltage battery pack, the BMS is tasked with ensuring the safety, longevity, and performance of electrochemical cells that are increasingly being pushed to their physical limits:
- wider usable SOC windows
- faster charging
- higher discharge rates
- longer life
The market for electric vehicle (EV) battery management chips, valued at approximately USD 1.56 billion in 2024, is on a trajectory to reach USD 5.94 billion by 2034, representing a compound annual growth rate (CAGR) of 14.6% [1].
As battery pack costs decrease, advanced BMS intelligence is becoming viable in mid-range vehicles and smaller industrial devices that previously could not justify the integration costs. Manufacturers are now focusing on a “platform approach” where a single chipset architecture can scale from 48V mild hybrids to 800V/1500V grid-scale storage systems. This modularity is essential for managing the diverse needs of the automotive (50% market share), energy storage (20%), and consumer electronics (15%) segments.
- Texas Instruments (TI)
- TI leads with a comprehensive portfolio capable of highly synchronized fast measurements and provides both conventional passive balancers (BQ79xxx series) and dedicated active balancing chipsets (EMB14xx) capable of higher current charge redistribution.
- They also offer an ASIL D-assessed proprietary wireless BMS technology (CC2662R-Q1).
- NXP Semiconductors
- Bring Electrochemical Impedance Spectroscopy (EIS) out of the lab and embedding it directly into hardware like the BMA7418. This allows for deep in-pack diagnostics, high-frequency real-time monitoring, and micro-short circuit detection.
- Analog Devices (ADI)
- ADI targets the premium segment by guaranteeing very strict “lifetime Total Measurement Error (TME)” (±1.8 mV for the ADBMS6830) across broad temperature ranges.
- They were also pioneers in wireless BMS (wBMS) mesh networks using their SmartMesh IP.
- Infineon Technologies
- One of the largest semiconductor suppliers to the BMS market, based on a full system offering.
- Precise 16-bit Delta-Sigma ADC, parallel ADC architecture, ultra-fast & synched cell readout.
- Industry-benchmark quality.
- Renesas Electronics
- Renesas differentiates itself with extremely reliable long-term accuracy, as seen in the ISL78714’s 15-year long-term drift performance.
- Focus on tightly integrating their cell controllers with their automotive MCUs (like the RH850).
- Monolithic Power Systems (MPS)
- MPS differentiates largely in the active balancing sector, providing high-current (up to 3A) bidirectional buck-boost active balancers (MP264x series) to eliminate the heat generation associated with conventional passive balancing resistors.
The following table gives a brief overview of the chipsets and their key features. Note that this is not an exhaustive list.
| Company | Chipset / Model | Channels | Voltage Accuracy | Key Features & Architecture | ASIL Rating |
|---|---|---|---|---|---|
| Texas Instruments | BQ79616-Q1 | 16 | ±1.5 mV | Passive balancing (240mA), isolated daisy chain/SPI/UART, 128μs ADC acquisition. | ASIL D |
| Texas Instruments | BQ79718B-Q1 | 18 | ±1 mV (typ) | 300mA internal balancing, synced 64μs cell voltage & pack current measurement, limp-home mode. | ASIL D |
| Texas Instruments | EMB1428Q / EMB1499Q | Up to 7 (1428Q) | N/A | Dedicated active cell balancing chipset, up to 60V, SPI interface, isolated bidirectional DC-DC control. | AEC-Q100 |
| Texas Instruments | CC2662R-Q1 | N/A | N/A | Wireless BMS (wBMS) MCU operating on 2.4GHz with proprietary time-slotted/frequency-hopping protocol. | ASIL D (System) |
| NXP Semiconductors | BMA7418 | 18 | ±0.8 mV | Dedicated ADC per channel, Integrated Electrochemical Impedance Spectroscopy (EIS) with on-chip Discrete Fourier Transform (DFT). | ASIL D |
| NXP Semiconductors | MC33774 | 18 | ±0.8 to ±1 mV | Up to 300mA balancing, dynamic measurement averaging, isolated daisy chain (up to 62 nodes). | ASIL D |
| NXP Semiconductors | MC33771B / C | 14 | ±0.8 mV | 300mA passive balancing, integrated coulomb counter, robust isolated daisy chain (2 Mbps). | ASIL C/D |
| Analog Devices | ADBMS6830 / B | 16 | ±1.8 mV (TME) | Maximum lifetime Total Measurement Error (TME) of ±1.8 mV, simultaneous measurement, isoSPI (2 Mbps), 300mA balancing. | ASIL D |
| Analog Devices | LTC6813 | 18 | ±2.2 mV (TME) | Daisy chain interface (isoSPI 1 Mbps), Sigma-Delta ADC topology. | ASIL D |
| Analog Devices | ADBMS2950 | N/A | ±1 μV offset | Battery pack/link monitor, redundant pack current & voltage measurement, overcurrent detection, built-in isoSPI. | ASIL D |
| Analog Devices | LT8584 | N/A | N/A | 2.5A monolithic active cell balancer, integrates seamlessly with LTC680x families. | ISO 26262 |
| Infineon Technologies | TLE9009DQU / TLE9012DQU | 9 / 12 | ±1.1 mV 0.2 mV (typ) | Dedicated ADC per channel, isolated daisy chain (up to 62 nodes), Built-in digital filter (70Hz cut-off), Simultaneous 200 mA/cell balancing with 5 error-compensated NTC channels, Random Hot plugging support | ASIL D |
| Infineon Technologies | TLE9016DQK / TLE9018DQK | 16 / 18 | ±1.1 mV 0.2 mV (typ) | Dedicated ADC per channel, isolated daisy chain (up to 62 nodes & 3 MBit) that supports limp-home, synced <0,5 μs cell voltage & pack current measurement, Built-in IIR filter; low-power balancing, Simultaneous 300 mA/cell balancing with 8 error-compensated NTC channels, Random Hot plugging support | ASIL D |
| Renesas Electronics | ISL78714 | 14 | ±2 mV (initial) | Extensive lifetime stability ( ±6mV 15-year long-term drift), robust 2-wire daisy chain, 112 cells measured in <10ms. | ASIL D |
| Renesas Electronics | ISL94212 | 12 | ±10 mV | Internal and up to 4 external temperature inputs, robust daisy chain, 2Mbps SPI. | N/A |
| Monolithic Power (MPS) | MP2641, MP2642, MP2643 | 2 | N/A | Bidirectional buck-boost active balancers, up to 3A of charge redistribution between two series cells, OVP/UVP. | N/A |
Market roadmaps highlight a shift towards wireless BMS architectures and AI-driven diagnostics, which reduce vehicle weight and improve predictive maintenance. Furthermore, new regulatory standards like the EU Battery Regulation are establishing requirements for data traceability and battery passports throughout a pack’s lifecycle.
BMS History and Roadmap
When we look at the Battery Management System (BMS) History and Roadmap, we see a long period of simple functions and reporting. Then an exponential growth in capability with Lithium Ion chemistry, the cloud and machine learning.
With the market set to grow, developing regulation and the move towards Cloud based diagnostics it will be interesting how the BMS chipsets develop over the next few years.
This post has been built based on the support of and sponsorship from: illumion, Custom Power, Quarto Technical Services, Eatron Technologies and About:Energy
References
- Electric Vehicle Battery Management Chips Market Size & Share 2025 – 2034, GMI
- BQ79718B-Q1 data sheet, product information and support, TI.com
- Data Sheet – ADBMS6830B, Analog Devices
- Renesas Electronics’ 14-Cell Li-ion Battery Management IC Maximizes Battery Cell Life and Driving Range for Hybrid and Electric Vehicles, Renesas
- NXP Improves Battery Health Monitoring with EIS Capable Battery Management Chipset, NXP Investors
- Battery management ICs, Infineon