Introduction to Battery monitors and balancer chip
Company Profile
Hainan Huanyu Technology Co., Ltd. is a high-tech enterprise providing one-stop customized chip solutions.We manufacture embedded chips designed for integration into a wide variety of electronic systems. Our products serve diverse sectors-including electric vehicles, industrial robotics, and solar energy-reliably meeting operational demands across various scenarios and providing robust core support for a broad range of electronic devices.
Introduction to Battery monitors and balancer chip
Battery monitors and balancer chip are specialized semiconductor devices integrated into battery packs consisting of multiple cells connected in series. Their primary function is to monitor the operating status of each individual cell in real-time while balancing cell capacity and voltage through active or passive regulation methods. They serve as core components in battery management systems (BMS) for energy storage systems, new energy vehicle power batteries, and portable electronic devices.
In battery packs composed of multiple cells in series, variations in capacity, internal resistance, and voltage inevitably emerge among individual cells due to factors such as manufacturing process deviations, uneven operating temperatures, and differences in self-discharge rates. Without intervention, cells with higher voltages reach overcharge limits first during charging, while cells with lower voltages reach over-discharge limits first during discharging. Both scenarios accelerate battery aging and significantly reduce the cycle life of the entire pack; in severe cases, they can trigger safety issues such as thermal runaway. Battery monitor and balancer chips are designed specifically to address this issue by performing the dual core functions of status monitoring and balancing regulation.
Specific model numbers for Battery monitors and balancer chip
The BQ76907-Q1 is a highly integrated, high-precision battery monitor and protector designed for battery packs (Li-ion, Li-polymer, LiFePO4/LFP, and LTO) and supercapacitors consisting of 2 to 7 series-connected cells. The device features a high-precision monitoring system, a dedicated coulomb counter with accumulated charge integration, and a highly configurable protection subsystem, while also supporting host-controlled cell balancing. It integrates low-side protection NFET drivers, a programmable LDO for external system use, and an I2C host communication interface that supports operating frequencies up to 400kHz with optional CRC. The coulomb counter enables continuous counting across various power modes, with current consumption as low as 32µA. The BQ76907-Q1 operates within a supply voltage range of 3V to 38.5V and is housed in a 20-pin QFN package.
Battery monitors and balancer chip Parameters
The Battery monitors and balancer chip parameters are as follows:
|
Rating |
Automotive |
|
Number of series cells (max) |
7 |
|
Number of series cells (min) |
2 |
|
Features |
Digital output, I2C support, Integrated ADC, LDO output, Low-Power Sleep Mode, Low-side driver, Multi-cell support, One-time-programmable (OTP) memory, Open-wire detection, Overcurrent in charging protection, Overcurrent in discharging protection, Overtemperature protection, Overvoltage protection, Short-current detection, Sleep Mode, Temperature sensing, Undertemperature protection, Undervoltage protection |
|
Vin (max) (V) |
38.5 |
|
Communication interface |
I2C |
|
Device type |
Cell monitor and balancer, Protector |
|
Operating temperature range (°C) |
-40 to 125 |
|
Battery overvoltage protection (min) (V) |
0 |
|
Battery overvoltage protection (max) (V) |
5.5 |
|
TI functional safety category |
Functional Safety-Compliant |
|
Operating current (typ) (µA) |
140 |
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