Battery Protection Apparatus Bidirectional Communication Single Line
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Solution Overview
Problem
Conventional secondary battery protection systems only allow unidirectional information transmission between battery protection apparatuses, limiting their functionality as information cannot be bidirectionally exchanged, particularly between high-potential and low-potential sides.
Innovation Solution
A secondary battery protection system that uses a single communication line for bidirectional signal transmission between battery protection apparatuses, employing current and voltage transmission signals with specific threshold values to determine detection conditions, allowing devices to share information about overcharge, load connection, and other states.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If a single communication line is used for bidirectional signal transmission, then information sharing capability is improved, but signal interference and transmission reliability may worsen
Solution Approach 1:
The patent implements periodic action by using different time periods for current signal transmission and voltage signal transmission on the same communication line. The first protection apparatus transmits current signals during specific time periods, while the second protection apparatus transmits voltage signals during different time periods, eliminating signal interference while enabling bidirectional communication.
Solution Approach 2:
The patent applies dynamics by making the transmission mode flexible and adaptive. The system dynamically switches between current signal transmission and voltage signal transmission based on the type of information to be transmitted, the receiving apparatus's capabilities, and the communication phase, allowing optimal signal transmission under different conditions.
2Device complexity
If current and voltage signals share the same communication line, then device complexity is reduced, but signal detection precision may worsen
Solution Approach 1:
The patent uses periodic action to separate current and voltage signal transmissions in time, with each signal type transmitted during dedicated time windows. This temporal separation allows simple single-line configuration while maintaining high detection precision through clear signal differentiation.
Solution Approach 2:
The patent introduces an intermediary mechanism in the form of a communication control unit that coordinates signal transmissions, manages time periods, and ensures proper signal recognition. This intermediary enables precise signal detection despite the shared communication medium.
Data Source
AI summary
A secondary battery protection apparatus includes a plurality of secondary battery protection apparatuses. One of two adjacent secondary battery protection apparatuses includes a voltage determination unit that is not affected by a current transfer signal and configured to receive, through a single communication line, the current transfer signal that is transmitted from the other of the two adjacent battery protection apparatuses through the single communication line and an information element based on changes of a voltage value of a voltage transfer signal, and a current determination unit that is not affected by the voltage transfer signal and configured to receive, through the single communication line, the voltage transfer signal that is transmitted from the other of the two adjacent secondary battery protection apparatuses through the single communication line and an information element based on changes of the current value of the current transfer signal.