Features
- Monitors and manages up to 14 cells; all standard Li-ion cell chemistries
- AEC-Q100 qualified, supports ASIL D systems
- Robust two-wire daisy chain communications system using a capacitor or transformer coupling at up to 1Mbps
- High-coverage communication protocol based on ISO 26262
- Cell voltage measurement accuracy 1.65V to 4.28V; -20 °C to +85 °C:
- Initial Device accuracy: ±2mV
- Post board assembly device accuracy: ±2.5mV
- Cell input range: ±5.0V, negative voltages ideal for bus bars and fuel cells
- Up to six external temperature monitoring inputs
- Internal temperature monitoring with warning flag
- Two general-purpose I/O pins
- Automatic sensing of position in battery stack
- Measures and performs read-back on all voltages, temperatures, and diagnostics for 112 cells in less than 10ms
- User-selectable cell measurement averaging function
- 14-bit voltage and temperature measurements
- Integrated system diagnostics for all key functions
- Watchdog shuts down device if communication is lost
- Long term drift: -0.31 log(khrs)
- Fully tolerant to EMC and transients – excellent Hot Plug performance
- Available Complex Device Driver software follows AUTOSAR, Aspice, and ISO 26262 ASIL-D development processes
- Configuration and integration of required MCAL modules provided by Renesas for the RH850 MCU
Description
The ISL78714 automotive-grade Li-ion battery manager IC supervises up to 14 series connected cells and is optimized to meet stringent automotive performance, reliability, and safety requirements. The device provides all the functions expected of such a critical component in a battery management system, such as accurate cell voltage and temperature monitoring, cell balancing, and extensive system diagnostics. In a typical configuration, a master ISL78714 communicates to a host microcontroller through an SPI port and up to 29 additional ISL78714 devices connected together by a robust, proprietary, two-wire daisy chain. This communication system is highly flexible and can be implemented with capacitor isolation, transformer isolation, or a combination of both. Three cell balancing modes are included: Manual Balance mode, Timed Balance mode, and Auto Balance mode. Auto Balance mode terminates balancing after a host-specified amount of charge has been removed from every cell. The ISL78714 is packaged in a 64-pin TQFP and is specified for operation from -40 °C to +105 °C.
An NDA is required for the full datasheet. Please contact your local Renesas sales representative for more information.
Parameters
| Attributes | Value |
|---|---|
| Cells Supported (#) | 6 - 14 |
| Pack Voltage (Op) | 12 - 65 |
| Cell Balancing FETs | External (Built-in FET Drivers) or Internal |
| Integrated Current Sense/Detection | No |
| Charge/Discharge FET Control | No |
| Charge/Discharge FET Arrangement | N/A |
| Charge/Discharge FET Location | N/A |
| IS (mA) | 5.6 |
| Sleep/Reset Mode Current (µA) | 22 |
| Stand Alone Capable | No |
| Internal ADC (bits) | 14 |
| Daisy Chain | Yes |
| GPI+GPIOs (#) | 6 |
| Qualification Level | Automotive |
| Temp. Range (°C) | -40 to +105°C |
Package Options
| Pkg. Type | Pkg. Dimensions (mm) | Lead Count (#) | Pitch (mm) |
|---|---|---|---|
| TQFP | 10.0 x 10.0 x 1.00 | 64 | 0.5 |
Application Block Diagrams
 | Humanoid Battery Management System Integrated humanoid robot BMS enabling safe, real-time power management, protection, and battery-state control. |
 | Wireless EV Battery Management System Renesas' wireless BMS removes wire harnesses, boosts flexibility, and uses Bluetooth LE for standardization. |
 | Standard EV Battery Management System Accurate, ASIL-D ready EV BMS with low BOM, cell balancing, and long-term battery performance. |
Additional Applications
- Battery Electric Vehicle (BEV)
- Hybrid Electric Vehicle (HEV)
- Plug-in Hybrid Electric Vehicle (PHEV)
- Electric motorcycle battery packs
- Backup battery and energy storage systems
- Portable and semi-portable equipment
Complete Your Design
Explore complementary products to elevate your design
Renesas Boards & Kits
Automotive Grade Multi-Cell Li-Ion Battery Manager Development Kit
The ISL78714BMS5XBEKIT1Z is a development kit that facilitates testing of the ISL78714 Li-ion battery pack analog front-end ICs and the Renesas RH850 microcontroller (MCU) in an automotive battery management system (BMS) solution. The RH850 communicates with the ISL78714 devices to monitor cell... Read More
Automotive Grade Multi-Cell Li-Ion Battery Manager Evaluation Kit
The ISL78714XB-EVKIT1Z is an evaluation kit that facilitates testing of the ISL78714 Li-ion battery pack analog front-end ICs. The ISL78714 monitors cell voltage and temperature, and provides 14-bit digital values, cell balance control, and significant fault detection. The ISL78714 also contains... Read More
Filters
Software & Tools
Filter by Type
Filter by Provider
Partner Solutions
- Software PackageBMS application models and software reduce the effort and time required to develop applications to estimate State Of Charge and State Of Health.
Model-Based Development PlatformOffers electrochemical battery models designed to run on Renesas battery management solution platforms, enabling more accurate state estimation and improved overall battery performance.Provided By: BattGenie
No Results Found.
Make sure all keywords are spelled correctly.
Try fewer, different, or more general terms to vary your search.
If you have filters applied, consider deselecting some to broaden your results.
- Search our extensive knowledgebase, designed to help customers with their FAQs.
- Get help from our expert Renesas technical staff and community on our support forums.
- Software PackageBMS application models and software reduce the effort and time required to develop applications to estimate State Of Charge and State Of Health.
Software & Tools (1)
No Results Found.
Make sure all keywords are spelled correctly.
Try fewer, different, or more general terms to vary your search.
If you have filters applied, consider deselecting some to broaden your results.
- Search our extensive knowledgebase, designed to help customers with their FAQs.
- Get help from our expert Renesas technical staff and community on our support forums.
No Results Found.
Make sure all keywords are spelled correctly.
Try fewer, different, or more general terms to vary your search.
If you have filters applied, consider deselecting some to broaden your results.
- Search our extensive knowledgebase, designed to help customers with their FAQs.
- Get help from our expert Renesas technical staff and community on our support forums.
- Model-Based Development PlatformOffers electrochemical battery models designed to run on Renesas battery management solution platforms, enabling more accurate state estimation and improved overall battery performance.Provided By: BattGenie
Partner Solutions (1)
Support Communities
-
In RH850 F1KM-S1 and ISL78714 AFE data getting delay when changing baud rate
Hi,I am using RH850F1KM-S1(100pin) MCU and ISL78714 for AFE. MCU and AFE are communicating with SPI(CSIH). In code I am using 500Kbps and the data is transmitting properly(data being displaying by UART) in standalone, but as I am increasing the speed of SPI to 1Mbps ...
Apr 15, 2024 -
Regaring ISL78714 Battery Monitor IC interface?
Hi Tech support, What communication interface can the ISL78714 support? thanks!
Aug 23, 2021 -
ISL78714 SPI NOT WORKING
Hi, I have got a custom board for ISL78714 , I am not able to communicate with ISL78714. I am using SPI Communication. I am transmitting the data , but i am not receiving anything from the ISL78714. I am just sending the packet header of 5 bytes. Am i doing something ...
Apr 22, 2024
Support Communities
