Battery Module Alarm Line Bridging Faulty Cells
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Solution Overview
Problem
Existing battery modules lack the ability to autonomously bridge or decouple from a battery system in response to a faulty battery cell within the module, which can lead to system instability and potential damage.
Innovation Solution
A battery module design featuring a monitoring circuit connected to an alarm line, which upon detecting a critical state in a battery cell, triggers a battery module circuit to bridge or decouple the entire module via its terminals, utilizing a half-bridge circuit and semiconductor switches for safe and efficient operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If battery modules are assembled from multiple storage elements connected in series or parallel to achieve higher voltage or capacity, then the energy output and capacity of the battery system are improved, but the risk of system instability and damage increases when a single battery cell enters a critical state
Solution Approach 1:
The battery module is segmented into multiple independently controllable battery strings, each with its own monitoring circuit. This allows individual strings to be monitored and protected separately, preventing a single point of failure from compromising the entire system while maintaining high voltage and capacity through series-parallel configuration.
Solution Approach 2:
A battery module circuit acts as an intermediary between the monitoring circuit and the battery terminals. When a critical state is detected, this intermediary component automatically bridges the terminals to isolate the faulty battery cell, preventing system instability while allowing the battery module to continue operating at high power levels.
2Device complexity
If traditional monitoring circuits are used that only detect critical states without automatic response, then the device complexity is kept low, but the ability to prevent damage and ensure safety is insufficient
Solution Approach 1:
The battery module incorporates an automatic self-protection mechanism where the monitoring circuit triggers the battery module circuit to bridge the terminals autonomously when a critical state is detected. This self-service capability eliminates the need for external intervention or complex control systems while ensuring reliable safety response.
Solution Approach 2:
The battery module circuit is pre-configured with bridging capability that can be activated immediately upon detecting a critical state. This preliminary preparation allows for instant protective action without requiring complex real-time decision-making circuits, maintaining simplicity while ensuring rapid safety response.
3Ease of operation
If battery cells operate without intrinsic safety mechanisms, then the manufacturing and operational simplicity is maintained, but the potential for damage propagation and system failure increases
Solution Approach 1:
The battery module incorporates a preliminary anti-action mechanism where the battery module circuit proactively bridges the terminals upon detecting a critical state in any battery cell. This preemptive action counteracts potential damage propagation before it can affect other cells or the entire system, maintaining operational simplicity while eliminating harm risks.
Data Source
AI summary
A battery module for a battery system includes two terminals, via which the battery module can be electrically connected to the battery system. Furthermore, the battery module has a battery string, which connects the two terminals to one another and has at least one battery cell connected in series and/or in parallel with the battery string. The battery module comprises a battery module circuit, which is configured, upon receiving an alarm signal, to bridge the battery module via the terminals thereof. The at least one battery cell is connected to a monitoring circuit associated with the battery cell. The monitoring circuit is connected to an alarm line via an electrical connection. The alarm line is connected to an input of the battery module circuit.