Battery Power Supply System with Voltage-Controlled Parallel Switching
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Solution Overview
Problem
Conventional electronic devices equipped with single battery units require frequent replacements or external charging, leading to voltage differences between new and old batteries, which can cause safety risks and inefficiencies when multiple batteries are used, making them inconvenient and unsafe.
Innovation Solution
A battery power supply system with an expansion slot module and control switches connects multiple battery units in parallel, with a power supply processor managing voltage differences to ensure safe and efficient charging/discharging operations by defining a fiducial battery unit and turning on control switches when voltage differences are within a predetermined range.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If multiple battery units are connected in parallel to extend operation duration, then the duration of action is improved, but the reliability deteriorates due to voltage differences causing large current flows and explosion risks
Solution Approach 1:
The power supply processor continuously monitors voltage values of all battery units and uses this feedback to dynamically control the connection state of control switches. When voltage difference exceeds the predetermined threshold, the processor opens the switch for the higher-voltage battery, preventing unsafe parallel connection and enabling safe extended operation.
Solution Approach 2:
Control switches are introduced as intermediary components between battery units and the power supply processor. These switches act as mediators that selectively connect or disconnect battery units based on voltage conditions, preventing direct unsafe connections while enabling safe parallel operation when conditions are met.
2Power
If multiple battery units are connected in parallel to increase power capacity, then the power is improved, but the reliability deteriorates due to voltage differences causing large current flows
Solution Approach 1:
The power supply processor continuously monitors voltage values and uses this feedback to control connection switches. When voltage difference exceeds the predetermined threshold, the processor prevents parallel connection by opening the switch, thereby maintaining safety while enabling power capacity expansion under safe conditions.
Solution Approach 2:
Control switches serve as intermediary components that mediate the connection between battery units. They enable power capacity expansion through parallel connection when voltage levels are compatible, while preventing unsafe connections when voltage differences are too large, thus resolving the contradiction between power and reliability.
3Device complexity
If a single battery unit is used to keep the device simple, then the device complexity is reduced, but the duration of action is limited requiring frequent replacements
Solution Approach 1:
The power supply system is segmented into multiple independent battery units, each with its own control switch. This segmentation allows flexible configuration where battery units can be independently managed, connected, or disconnected based on power needs, thereby extending operation duration while maintaining manageable system complexity through modular design.
Solution Approach 2:
The system transitions from a static single-battery configuration to a dynamic multi-battery system where control switches can selectively connect or disconnect battery units based on real-time voltage conditions. This dynamic adaptability enables extended operation duration while keeping the system manageable through intelligent control.
4Power
If battery units with different voltages are connected without control to increase power capacity, then the power is improved, but the loss of energy increases due to inefficient power conversion
Solution Approach 1:
The power supply processor continuously monitors voltage values of all battery units and uses this feedback to determine when parallel connection is energetically efficient. By comparing real-time voltage readings against predetermined thresholds, the processor enables connection only when voltage levels are compatible, thereby maximizing power capacity while minimizing energy loss from inefficient conversion.
Data Source
AI summary
A battery power supply system and a battery power supply method for a main system are provided. The battery power supply system includes a power supply processor, an expansion slot module with plural slots, and plural battery units. The plural battery units are docked with the corresponding slots. Moreover, plural control switches are electrically connected between the corresponding slots and the power supply processor. A voltage value of one battery unit is defined as a fiducial voltage value. If the difference between the fiducial voltage value and the voltage value of at least one battery unit of the rest of the battery units is within a predetermined value, the control switch corresponding to the at least one battery unit is turned on. The battery unit with the fiducial voltage value and the at least one battery unit are connected with each other in parallel.