PRODUCTS
The DNB1168 is a single cell supervisor (Linx) IC that provides electrochemical impedance spectroscopy (EIS) for each individual cell or a group of cells in parallel. The integrated die temperature sensors can be used for cell temperature measurement. Additional thermo-couples/NTCs are no longer required. The DNB1168 measures the cell impedance based on a patented circuit technology, enabling a new approach of indicating the internal cell temperature. It also enables on-line state-of-health estimation, in combination with algorithms running on the pack controller. The IC integrates separate (redundant) ADCs for both voltage and temperature measurement. With a differential daisy chain, the cell measurement information is transmitted to the pack controller. The first IC in the chain translates a standard SPI signal to the daisy chain differential signal.
Key Features
Automotive qualified per AEC-Q100
Voltage measurement accuracy: ±2 mV
Battery cell voltage range: 1.9 - 5.5 V
Die temperature sensor accuracy: ±2.5 K
Passive balancing with diagnostics
Low-ohmic cells EIS (impedance spectroscopy)
Daisy chain communication speed: 1 Mbps
Temperature range: -40⁰C to 125⁰C
Applications
High voltage battery pack of electric and hybrid electric vehicles
48V battery pack of mild hybrid electric vehicles
Energy storage systems
Electric bicycles and motorcycles
Silicon Note
Application Note
| Voltage measurement accuracy +/- 2mV | Cell measurement voltage range 1.9V to 5.5V |
| The precision of temperature sensor inside the chip is +/- 2.5K | Daisy chain communication rate 1Mbps |
| Operating temperature range -40 degrees to 125 degrees | Impedance monitoring frequency range 7.5mHz to 7.8kHz |
| The maximum balance current is 200mA |
Single-Cell-Monitoring IC – EIS function（1）
EIS (AC impedance spectroscopy) is the core function of battery management (BMS) chip of Datang NXP semiconductor company, which is different from traditional chip. EIS is closely related to various states of the cell, including cell temperature, cell power, cell aging degree and cell anomaly prediction. As a new function of BMS, EIS is widely used. At the same time, it also makes some high-end applications in this field possible. The industry began to pay extensive attention to this chip and EIS. In this issue, we will explain in detail the application of EIS in BMS system.
Live: DNB1168 -- Single cell battery management System chip solution
Function overview of single cell monitoring chip DNB1168
Live: New energy lithium cell battery management scheme with impedance detection function
This seminar will introduce Datang NXP Semiconductors's single cell based battery management solution:
- This solution can bring customers more accurate temperature and voltage sampling;
- Additional impedance detection function provided to customers to escort the safety of new energy vehicle power battery;
- The battery management chip DNB1168 in this solution, its core components are 100% domestic, the chip is integrated with the ac impedance monitoring of the cell, the chip is integrated with the temperature sensor, and the circuit of the highest safety level ASIL-D.
Ameya Holding Limited
1001, North Block, Cangsong Building, Chegongmiao, Futian District, Shenzhen
18925230051 jackchen@ameya360.com
Powertek Group Co.,Ltd
2101-02,Office Tower 2,Century Link,
No.1196 Century Avenue,Pudong New Area,Shanghai,China
13916656520
EDOM Technology Co Ltd
Singapore Branch Block 4102 , Ang Mo Kio Avenue 10.#07-08 Techplace !, Singapore
(65)63465198-102
