Battery Pack Pulse Discharge Voltage Drop Prevention
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Solution Overview
Problem
Conventional battery packs struggle to accurately calculate and manage voltage during peak discharge, leading to potential voltage drops below predetermined thresholds, resulting in incorrect capacity calculations and premature shutdowns during high-power CPU processing in electronic devices.
Innovation Solution
A battery pack with a detector that continuously monitors current and voltage values before and after detection, using an electronic circuit to determine when peak discharge power is applied, and a controller that operates to prevent voltage drops below predetermined levels by controlling the discharge.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the battery pack performs pulse discharge to provide peak power for instantaneous processing speed improvement, then the power output is increased, but the voltage drops below predetermined thresholds causing incorrect capacity calculations and premature shutdowns
Solution Approach 1:
The detector measures current values before and after voltage detection to predict potential voltage drops during pulse discharge. By performing this preliminary detection, the system can identify when voltage will fall below thresholds and take preventive action before the actual voltage drop occurs, ensuring both high power delivery and voltage stability.
Solution Approach 2:
The controller/operator uses the current values detected by the detector to determine whether peak discharge is occurring, and adjusts the discharge control accordingly. This feedback mechanism allows the system to maintain voltage above predetermined thresholds while still providing peak power when needed, resolving the contradiction between power output and voltage stability.
2Device complexity
If the detector measures voltage in a time-division manner with current measurements, then the device complexity is reduced, but the measurement precision of voltage during peak discharge is insufficient
Solution Approach 1:
The detector performs current measurements before and after voltage detection to predict voltage drops during pulse discharge. This preliminary action compensates for the limitations of time-division measurement by providing additional data points that enable accurate voltage assessment even when direct voltage measurement during peak discharge is not performed.
Solution Approach 2:
The current values measured before and after voltage detection serve as intermediary parameters to infer the voltage state during peak discharge. Instead of directly measuring voltage during the pulse (which would require more complex real-time measurement circuitry), the system uses current measurements as intermediaries to determine voltage conditions and make accurate capacity calculations.
Data Source
AI summary
The battery pack including a battery group in which a plurality of secondary batteries are connected in series; a detector that detects a charging and discharging current value flowing in the battery group and a voltage value of the battery group in a time-division manner by switching between the current value and the voltage value using an electronic circuit; and a controller/operator that performs operation and control using the current value and the voltage value detected by the detector. In the battery pack, the detector detects current values before and after the voltage value of the battery group is detected, and the controller/operator determines that the voltage value of the battery group is influenced by the peak discharge power when at least one of the current values exceeds a predetermined threshold.