Accurate gauging and 50-μA standby current, 13-S, 48-V li-ion battery pack reference design
TIDA-010030
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Key Document
Description
This reference design is a low standby and ship mode current consumption and high SOC gauging accuracy 13S, 48-V Li-ion battery pack design. It monitors each cell voltage, pack current and temperature with high accuracy and protects the Li-ion battery pack against overvoltage, undervoltage, over temperature and over current situations. The SOC gauging, based on bq34z100-g1, takes advantage of an impedance tracking algorithm and achieves as high as 2% accuracy at room temperature. Through a well-designed auxiliary power supply strategy and high efficiency, low quiescent current DC-DC converter LM5164, this design achieves 50-μA stand-by and 5-μA ship mode consumption, saving more energy and allowing longer shipping time and idle time. Also, this design supports a well running firmware, which helps to decrease product research time.
Features
- 2% battery pack SOC accuracy at room temperature
- 50-μA current consumption when in standby mode
- 15-μA current consumption when in shipping mode
- Robust and programmable protection, including: cell over voltage, cell under voltage, overcurrent discharge, short circuit, overtemperature and undertemperature
- Support 100-mA cell balancing
- High-side charging and discharging MOSFETs and support pre-discharge function
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Schematic/Block Diagram
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Design Guide
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TI Devices (12)
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| Sample & Buy |
Design Kits & Evaluation Modules |
| BQ34Z100-G1 |
Multi-chemistry Impedance Track™ standalone fuel gauge | battery gas gauge |
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| BQ76200 |
High-side n-channel FET driver |
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| BQ76940 |
9 to 15-series cell li-ion and li-phosphate battery monitor (bq76940 family) |
Battery management ICs |
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| BQ7718 |
Family 2-5S Overvoltage Protector with Internal Delay Timer |
Battery management ICs |
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| CSD19536KTT |
100-V, N channel NexFET™ power MOSFET, single D2PAK, 2.4 mOhm |
MOSFETs |
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Not Available |
| ISO1042 |
Isolated CAN transceiver with 70-V bus fault protection & flexible data rate |
Isolated interface ICs |
Sample & Buy |
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| LM5164 |
6-V to 100-V input, 1-A synchronous buck DC-DC converter with ultra-low IQ |
Step-down (buck) regulators |
Sample & Buy |
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| MSP430FR2155 |
24 MHz MCU with 32KB FRAM, 4KB SRAM, comparator, 12-bit ADC, UART/SPI/I2C, timer |
Microcontrollers (MCUs) |
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| SN6501 |
Low-noise, 350-mA, 410-kHz transformer driver for isolated power supplies |
Power for signal isolators |
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| THVD1500 |
5-V RS-485 transceiver up to 500 kbps with ±8-kV IEC ESD protection |
Interface |
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| TLV704 |
150-mA, 24-V, ultra-low-IQ, low-dropout voltage regulator |
Power management |
Sample & Buy |
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| TPD2E007 |
Dual 15-pF, ±13-V, ±8-kV ESD protection diode for AC Signal Data Interfaces |
Circuit protection ICs |
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CAD/CAE symbols
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Step 2: Download the Symbol and Footprint from the CAD.bxl file table.
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Technical documentation
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User guide (1)
| Title | Type | Size (KB) | Date |
| | PDF | 7322 |
26 Feb 2019
|
Design files (6)
| | ZIP | 4151 |
26 Oct 2020
|
| | ZIP | 697 |
26 Oct 2020
|
| | ZIP | 1423 |
17 Jun 2019
|
| | ZIP | 1275 |
14 Dec 2018
|
| | ZIP | 317 |
14 Dec 2018
|
| | ZIP | 345 |
14 Dec 2018
|
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