Battery Pack Signal Switching Circuit for Optimal Timing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The timing of signal transmission from a battery pack to a device body is not always optimal, leading to inconsistent operation and display issues, as the optimal timing varies by device type, and voltage thresholds for overdischarge detection may differ between the battery pack and the device body, causing inappropriate control and display inconsistencies.
Innovation Solution
The battery pack and device body communicate through a system of switching circuits and communication terminals, allowing the device body to transmit signals requesting information from the battery pack, and the battery pack to transmit information based on received signals, enabling appropriate control and synchronization of operations, including overdischarge detection and remaining capacity display.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the battery pack transmits information immediately after connection to the device body, then the information transmission timing is simple and fixed, but the transmission timing may not be optimal for different device types, leading to operation and display inconsistencies
Solution Approach 1:
The device body transmits a predetermined signal to the battery pack before the battery pack transmits its information, ensuring that the battery pack is ready to transmit at an optimal timing. This preliminary action by the device body allows the system to avoid transmission issues while maintaining operational consistency across different device types.
2Adaptability or versatility
If the battery pack uses fixed voltage thresholds for overdischarge detection, then the control logic is simple, but the detection may not be appropriate when connected to different electrical apparatuses with different voltage requirements
Solution Approach 1:
The battery pack dynamically changes its overdischarge detection voltage threshold based on the type of electrical apparatus connected. The system determines the apparatus type and selects appropriate threshold values, enabling adaptable overdischarge protection that is suitable for different electrical apparatuses while maintaining safe operation.
3Reliability
If the battery pack and device body have different overdischarge detection thresholds, then each can optimize for its own requirements, but this causes detection timing differences and display inconsistencies
Solution Approach 1:
The battery pack receives information from the device body about its operation state and uses this feedback to coordinate its remaining capacity display. When the device body stops operation due to overdischarge detection, the battery pack receives this information and adjusts its display accordingly, ensuring that the display accurately reflects the actual operational state even when detection thresholds differ.
Data Source
AI summary
Provided are a battery pack and an electrical apparatus by which information can be transmitted at an appropriate timing from the battery pack to a device body. A battery pack (10) includes: a serial communication reception circuit (31) and a temperature information transmission circuit (32); an LS terminal that is selectively connected to the serial communication reception circuit (31) or the temperature information transmission circuit (32); a first switching circuit (21) that is provided between the LS terminal and the serial communication reception circuit (31) and the temperature information transmission circuit (32); and a V terminal that is connected to the first switching circuit (21). The first switching circuit (21) switches between connecting the serial communication reception circuit (31) or the temperature information transmission circuit (32) to the LS terminal according to a signal inputted from the V terminal.