Abstract: A high precision current sense circuit was designed in a 0.18μm BCD IC process and employed in a battery management chip. The influence of offset voltage on current acquisition accuracy is analyzed. The chopper dynamic regulation technology is used to reduce the offset voltage of the amplifier, and the instrumentation amplifier is ...
After filtered by corresponding RC, BAT1 to BAT3 are connected to the battery management chip. Sampling resistor RIS, which is connected in series in the discharge path, converts the discharge current to voltage VIS, then it is used to detect discharge overcurrent by the pin IS.
The key to ensuring the performance and reliability of energy vehicles is the BMS, in which BMIC is responsible for accurately monitoring various battery cell data. A 16-cell stackable battery monitoring and management chip using 0.18 μm high-voltage BCD technology was designed in this study.
Sampling resistor RIS, which is connected in series in the discharge path, converts the discharge current to voltage VIS, then it is used to detect discharge overcurrent by the pin IS. The open and close of NM1 are controlled by the pin CFET of battery management chip, while NM2 is controlled by corresponding pin DFET.
This paper describes a stackable battery monitoring and management integrated circuit for EVs. Owing to the number of cells in the series, the amount of data transmitted by the BMS is significant. The integration of digital control and registers in the BMIC is necessary for the efficient execution of each function.
The sum of R1 and R2, R4 and R6 is often selected as the resistance of 2 MΩ. Therefore, when the battery voltage is around 3.8 V, the current consumed by each transfer branch is about 1.9 µA. Besides, it uses many discrete amplifiers and resistors, which cause high cost.
A structurally complete battery monitoring chip design is presented in Ref. , which supports seven-cell series battery stack monitoring and has two additional temperature monitoring channels. A 12-bit SAR ADC was designed to achieve a measured accuracy of ±7 mV.
Abstract: A high precision current sense circuit was designed in a 0.18μm BCD IC process and employed in a battery management chip. The influence of offset voltage on current acquisition accuracy is analyzed. The chopper dynamic regulation technology is used to reduce the offset voltage of the amplifier, and the instrumentation amplifier is ...
Get PriceThis paper presents a High Precision Voltage Reference (HPVR) circuit used in high-precision battery parameter acquisition chip for Battery Management System (B
Get PriceThe proposed dual-output high-voltage regulators can directly power each module in the chip with high-voltage input and low quiescent current. The proposed high-voltage multi-channel battery monitoring structure supports 16-cell multiplexing, the selection of six auxiliary low-voltage channels, and shares an incremental sigma-delta ADC to ...
Get PriceLTC6811 is a chip specially designed by Linear Technology for EV battery voltage acquisition. Each LTC6811-1 chip can measure the voltages of 12 cells in series within 290 μs. The parallel use between chips is also very …
Get PriceAbstract: This paper presents a High-Voltage High-PSRR (HVHP) power management circuit used in high-precision battery parameters acquisition chip for Battery Management System for …
Get PriceThe proposed dual-output high-voltage regulators can directly power each module in the chip with high-voltage input and low quiescent current. The proposed high …
Get PriceAs an external board, a microcontroller integrated in a system on chip is used to control the battery monitor to acquire the impedance-related signals (current and voltage) and perform the cell impedance computation from time-domain signals.
Get PriceAs an external board, a microcontroller integrated in a system on chip is used to control the battery monitor to acquire the impedance-related signals (current and voltage) and …
Get PriceThis paper presents a High Precision Voltage Reference (HPVR) circuit used in high-precision battery parameter acquisition chip for Battery Management System (B
Get PriceAn improved voltage transfer method for lithium battery string management chip is proposed. This method can not only reduce the cost, but also eliminate the leakage current of batteries caused in traditional method, …
Get PriceAbstract: This paper presents a High-Voltage High-PSRR (HVHP) power management circuit used in high-precision battery parameters acquisition chip for Battery Management System for new energy vehicles. It consists of a pre-regulator, a high PSRR (power supply rejection ratio) self-regulated bandgap voltage reference (BGR), high voltage linear ...
Get PriceA current ADC (CADC) is a 16-bit incremental ADC specifically designed to measure a Li-ion battery''s charge and discharge current, which scales the voltage across a shunt resistor by a precision gain control block and converts with a resolution of 3.8 μ V.
Get PriceWith the growth of Hybrid Electric vehicles (HEV) and Electric vehicles (EV), the conventional 12 V circuits now need to communicate with higher voltage circuits. For the hybrid vehicles, this …
Get PriceAn improved voltage transfer method for lithium battery string management chip is proposed. This method can not only reduce the cost, but also eliminate the leakage current of batteries caused in traditional method, which is well beneficial for battery voltage balance.
Get PriceLTC6811 is a chip specially designed by Linear Technology for EV battery voltage acquisition. Each LTC6811-1 chip can measure the voltages of 12 cells in series within 290 μs. The parallel use between chips is also very convenient. In specific use, the LT6811-1 is connected to the four pins of the control chip to realize the serial peripheral ...
Get PriceTo rapidly and accurately measure the terminal voltage of lithium-ion batteries, this study employs the DS2438 chip as the voltage acquisition chip. DS2438 utilizes a single-wire communication method, …
Get PriceTo rapidly and accurately measure the terminal voltage of lithium-ion batteries, this study employs the DS2438 chip as the voltage acquisition chip. DS2438 utilizes a single-wire communication method, enabling data transmission through a single data line. Each DS2438 is assigned a unique serial number, allowing communication by reading the chip ...
Get PriceA current ADC (CADC) is a 16-bit incremental ADC specifically designed to measure a Li-ion battery''s charge and discharge current, which scales the voltage across a …
Get PriceWith the growth of Hybrid Electric vehicles (HEV) and Electric vehicles (EV), the conventional 12 V circuits now need to communicate with higher voltage circuits. For the hybrid vehicles, this would be 48 V batteries whereas for the fully electric vehicles this could be 400 V or even more.
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