Battery Pack Driving Voltage Supply Source for Low-Voltage Discharge Prevention
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Battery packs face reduced lifespan and unnecessary discharge when control circuits continuously draw power from secondary cells in low-voltage states, leading to unnecessary battery charge reduction.
Innovation Solution
A battery pack design that includes a driving voltage supply source generating a driving voltage based on a third node's voltage, with a controller managing the main switch and enabling/disabling the control circuit based on threshold voltages, allowing manual operation to prevent continuous discharge during low-voltage states.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the control circuit continuously operates to manage battery protection, then the battery protection function is maintained, but the secondary cells continue to discharge in low-voltage state which shortens battery pack lifetime
Solution Approach 1:
The control circuit operates periodically rather than continuously. The controller enters a sleep mode after detecting low-voltage state and only wakes up when voltage threshold is reached or external interrupt occurs, reducing continuous operation while maintaining protection capability
Solution Approach 2:
The system uses voltage threshold detection and external interrupt signals to automatically wake the controller from sleep mode, eliminating the need for continuous monitoring while ensuring protection function is activated when needed
2Measurement precision
If the control circuit remains active to monitor battery voltage, then real-time battery status monitoring is achieved, but unnecessary battery charge is consumed in low-voltage state
Solution Approach 1:
The controller alternates between active monitoring state and sleep mode. During sleep mode, power consumption is minimized while the system remains capable of detecting voltage changes through external interrupt circuits, achieving energy-efficient monitoring
Solution Approach 2:
An external interrupt circuit acts as an intermediary that detects voltage threshold changes and triggers controller activation without requiring continuous controller operation, reducing energy consumption while maintaining monitoring capability
3Ease of operation
If the controller operates continuously to control the main switch, then precise control of battery discharge is maintained, but the battery charge is needlessly reduced in low-voltage state
Solution Approach 1:
The controller enables precise control when active but operates periodically rather than continuously. It enters sleep mode after low-voltage detection and reactivates only when voltage threshold is reached or external interrupt occurs, maintaining control precision when needed while reducing energy loss during idle periods
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution prevents continuous discharge of battery cells in low-voltage states, thereby extending battery life and allowing manual operation to manage the control circuit's state, ensuring stable and reliable battery pack operation.
Implementation Method 1
wherein the third node is diode-connected to the first node and the second node
Data Source
AI summary
A battery pack includes a battery, main switch, controller, and driving voltage supply source. The battery has at least one battery cell. The main switch is connected between a first node and a second node, the battery is connected to the first node and an external terminal, and the external terminal connected to the second node. The controller manages the battery and to control the main switch. The driving voltage supply source generates a driving voltage based on a voltage of a third node and to supply the driving voltage to the controller. The third node is diode-connected to the first node and the second node.