特長
- 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
説明
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.
パラメータ
| 属性 | 値 |
|---|---|
| Cells Supported (#) | - |
| Pack Voltage (Op) | - |
| 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 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 |
パッケージオプション
| Pkg. Type | Pkg. Dimensions (mm) | Lead Count (#) | Pitch (mm) |
|---|---|---|---|
| TQFP | 10.0 x 10.0 x 1.00 | 64 | 0.5 |
アプリケーション・ブロック図
|
EV用ワイヤレスバッテリマネジメントシステム
ルネサスのワイヤレスBMSは、ワイヤハーネスをなくし、柔軟性を高め、標準化のためにBluetooth LEを使用しています。
|
|
標準EVバッテリ管理システム
高精度のASIL-D対応EV BMSは、低BOM、セルバランシング、長期バッテリ性能を備えています。
|
その他アプリケーション
- Automotive Battery Management Systems (BMS)
- Battery Electric Vehicle (BEV)
- Hybrid Electric Vehicle (HEV)
- Plug-in Hybrid Electric Vehicle (PHEV)
- Electric motorcycle battery packs
- Backup battery and energy storage systems requiring high accuracy management and monitoring
- Portable and semi-portable equipment