Battery Pack Reference Voltage Abnormality Detection
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Solution Overview
Problem
Conventional battery packs lack effective mechanisms to prevent recharging or discharging when safety and functional problems occur, potentially leading to overcharge or over-discharge issues due to malfunctioning microcontrollers.
Innovation Solution
Incorporating a microcomputer with voltage measuring terminals and a voltage distribution unit to detect abnormal reference voltages, using a voltage measuring unit to receive forwarding direction voltage from a diode, and controlling recharge and discharge operations based on these measurements to prevent overcharge and over-discharge.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional battery pack uses a simple rechargeable circuit without advanced monitoring, then the device complexity is low and ease of manufacture is high, but the reliability is insufficient to prevent overcharge or over-discharge when safety problems occur
Solution Approach 1:
The battery management integrated circuit performs preliminary detection of battery cell voltage and temperature before charging or discharging operations. By measuring voltage across each battery cell and monitoring temperature through sensing circuits, the system identifies potential safety issues in advance and prevents charging or discharging when abnormal conditions are detected, thereby avoiding overcharge or over-discharge without requiring complex external monitoring systems
Solution Approach 2:
The battery management integrated circuit performs multiple functions including voltage measurement, temperature monitoring, charging control, and discharging control within a single device. This multi-functional approach provides comprehensive safety protection while maintaining relatively simple device structure, as the single integrated circuit replaces what would otherwise require multiple separate components for each function
2Reliability
If the battery pack implements comprehensive voltage and temperature monitoring, then the reliability improves, but the manufacturing precision requirements increase
Solution Approach 1:
The patent combines voltage measurement circuits, temperature sensing circuits, charging control circuits, and discharging control circuits into a single battery management integrated circuit. This integration eliminates the need for precise manual assembly of multiple separate components, as the integrated circuit is manufactured as a unified device with all functional elements precisely positioned during semiconductor fabrication, thereby reducing manufacturing precision requirements while maintaining comprehensive monitoring capabilities
Data Source
AI summary
A battery pack includes at least one battery cell, a microcomputer having a first voltage measuring terminal, a second voltage measuring terminal, and a reference voltage output terminal, the microcomputer being configured to control recharge and discharge of the at least one battery cell by detecting an abnormality of a reference voltage at the reference voltage output terminal in accordance with first and second voltages at respective first and second voltage measuring terminals, a voltage distribution unit connected between the reference voltage output terminal and a ground, the voltage distribution unit being configured to distribute voltage and to output to the microcomputer a medium voltage as the first voltage, and a voltage measuring unit connected between the reference voltage output terminal and the ground, the voltage measuring unit being configured to output to the microcomputer a forwarding direction voltage of a diode as the second voltage.