Battery management apparatus and operating method thereof

By designing a battery management device including a comparator, switching circuit and impedance calculation unit, the problem of difficulty in measuring impedance of general and low-voltage battery cells at the same time is solved, and high-precision battery status monitoring is achieved.

CN119768696APending Publication Date: 2025-04-04LG ENERGY SOLUTION LTD
1 Cites 0 Cited by

Patent Information

Application Number
CN202380062067.5
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Priority Date
2022-09-06
Filing Date
2023-09-01
Publication Date
2025-04-04

AI Technical Summary

Technical Problem

Existing battery management equipment is difficult to simultaneously measure impedance of general battery cells and low voltage battery cells, and is susceptible to noise interference to cause measurement errors.

Method used

A battery management device is designed, including a first comparator, a switching circuit and an impedance calculation unit. By comparing the voltage of the battery cell with the reference voltage, the switching circuit switches the circuit path, the impedance calculation unit calculates the impedance of the battery cell based on the voltage applied by the different paths. In addition, the device also includes a voltage amplifier and a current controller for adapting to measurements in different voltage ranges.

Benefits of technology

Impedance measurement of general battery cells and low voltage battery cells is realized, reducing measurement errors caused by noise, and no separate measurement device is required according to the operating voltage of the battery cells.

✦ Generated by Eureka AI based on patent content.
Patent Text Reader

Abstract

A battery management apparatus according to one embodiment includes: a first comparator that compares a voltage of a battery cell with a first reference voltage; a switching circuit that sets, as a first path or a second path, a path through which the battery cell and the impedance calculation unit are electrically connected, on the basis of a result of the comparison by the first comparator; and an impedance calculation unit that calculates an impedance of the battery cell based on a first voltage applied through the first path or a second voltage applied through the second path.
Need to check novelty before this filing date? Find Prior Art