Battery Pack High Voltage Detector and Switch
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Solution Overview
Problem
Battery packs with lithium ion secondary batteries face the risk of microcomputer failure due to high voltage being applied to the communication terminal, which can occur from short circuits between power source and communication terminals.
Innovation Solution
Incorporating a high voltage detector and a switch within the battery pack to disconnect the communication terminal from the microcomputer when high voltage is detected, preventing the voltage from reaching the microcomputer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If battery cells are connected in series to output high voltage, then power output is improved, but the risk of microcomputer failure due to high voltage applied to communication terminal increases
Solution Approach 1:
A high voltage detector is introduced as an intermediary component between the power source terminal and the communication terminal. The detector monitors voltage levels and triggers a switch to disconnect the communication terminal when high voltage is detected, preventing direct voltage application to the microcomputer while maintaining normal communication functionality during safe operating conditions.
Solution Approach 2:
The high voltage detector continuously monitors voltage levels before high voltage can damage the microcomputer. By detecting high voltage conditions in advance and triggering the switch to disconnect the communication terminal proactively, the system prevents damage before it occurs, ensuring microcomputer reliability while allowing high power output when needed.
2Reliability
If a high voltage detector and switch are added to protect the microcomputer, then microcomputer reliability is improved, but device complexity increases
Solution Approach 1:
The high voltage detector acts as a simple intermediary monitoring component that only needs to detect voltage levels and trigger the switch. This adds minimal complexity compared to more sophisticated protection circuits, as the detector and switch work together as a straightforward protective mechanism without requiring complex control logic or multiple components.
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 effectively blocks high voltage from being applied to the microcomputer, thereby preventing crashes and ensuring the battery pack's operational reliability.
Implementation Method 1
a high voltage detector configured to detect a high voltage by comparing voltage applied to the communication terminal of the battery pack with a preset threshold value
Implementation Method 2
a switch configured to disconnect the communication terminal of the microcomputer from the communication terminal of the battery pack in response to an output from the high voltage detector
Data Source
AI summary
A battery pack includes a battery section including one or a plurality of battery cells, a microcomputer configured to communicate with outside, a power supply terminal connected to the battery section, a communication terminal of the battery pack connected to a communication terminal of the microcomputer, a high voltage detector configured to detect high voltage by comparing voltage applied to the communication terminal of the battery pack with a preset threshold value, and a switch configured to disconnect the communication terminal of the microcomputer from the communication terminal of the battery pack in response to an output from the high voltage detector.