Battery Module Isolation Control for Electrolyte Leakage Detection
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Solution Overview
Problem
Existing battery systems lack precise safety protection control for abnormalities such as electrolyte leakage, leading to potential smoking and fire risks, which compromises safety and reliability.
Innovation Solution
Incorporating a detection unit and switching unit in the battery system to control power transmission lines based on detection signals, allowing for accurate safety protection by cutting off or connecting internal and external power transmission lines in response to electrolyte leakage or thermal runaway.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If no detection and switching units are installed in the battery system, then the device complexity is low, but the safety and reliability of the battery system deteriorates due to inability to detect and respond to electrolyte leakage
Solution Approach 1:
The battery system is divided into modular units, each equipped with its own detection unit and switching unit. This segmentation allows safety functions to be distributed across multiple independent modules, improving overall system reliability without requiring a centralized complex control system. Each module can independently detect electrolyte leakage and isolate itself, preventing failure propagation.
Solution Approach 2:
Detection units and switching units are pre-installed within each battery module before operation. The detection units continuously monitor for electrolyte leakage conditions in advance, and the switching units are ready to immediately isolate affected modules when abnormalities are detected, preventing safety accidents before they can propagate through the entire battery system.
2Measurement precision
If detection unit and switching unit are added to each battery module, then the safety protection control precision improves, but the manufacturing cost and device complexity increase
Solution Approach 1:
By dividing the battery system into standardized modular units, each with integrated detection and switching capabilities, the patent achieves high safety precision through localized monitoring. The modular design simplifies manufacturing by allowing mass production of identical modules that can be assembled into different battery system configurations, reducing overall manufacturing complexity despite increased per-module complexity.
Solution Approach 2:
The detection unit and switching unit are designed as universal components that can be applied across all battery modules with the same electrical box configuration. This multi-functionality allows a single standardized design to serve multiple purposes across different battery pack arrangements, simplifying the manufacturing process through standardization while maintaining high safety precision through consistent monitoring and isolation capabilities.
3Object-affected harmful factors
If switching unit cuts off power transmission lines upon detecting abnormality, then the safety performance improves by preventing smoking and fire, but the productivity and availability of the battery system decreases
Solution Approach 1:
The switching unit is designed to isolate only the specific battery module experiencing electrolyte leakage rather than shutting down the entire battery system. This segmented isolation approach prevents harmful effects from propagating to other modules while maintaining productivity by allowing healthy modules to continue operating independently.
Solution Approach 2:
The switching unit acts as an intermediary component between the detection unit and the power transmission lines. When electrolyte leakage is detected, the switching unit mediates by selectively opening circuits to isolate affected modules while maintaining connectivity for healthy modules, thus balancing safety requirements with continued system productivity and availability.
Data Source
AI summary
A battery system comprises: a control unit and at least one battery, wherein the battery comprises: an electrical box and a plurality of battery cells, a detection unit and a first switching unit that are provided in the electrical box, the plurality of battery cells being connected to form a battery cell assembly; and the control unit is separately connected to the detection unit and the first switching unit for controlling, according to a detection signal collected by the detection unit, the first switching unit to cut off or connect an internal power transmission line and/or an external power transmission line of the battery cell assembly.