Battery Protection Control Using Cross-Validated Temperature Detection
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Solution Overview
Problem
The existing control apparatus for secondary batteries risks performing erroneous protection operations if the temperature sensor is damaged and cannot correctly detect the battery state, leading to potential malfunctions.
Innovation Solution
A control apparatus with multiple detection sections, a determination section to validate detection results, and a control section that performs protection operations only based on valid determination results, preventing erroneous actions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a temperature sensor is used to detect battery state for protection operation control, then protection operation can be performed to prevent battery damage, but erroneous detection results may cause incorrect protection operations
Solution Approach 1:
The patent divides the detection function into multiple independent detection sections (first detection section and second detection section), each detecting battery temperature through different methods. This segmentation allows cross-validation of detection results, preventing erroneous protection operations caused by single sensor failure while maintaining reliable temperature monitoring for battery protection.
2Reliability
If multiple detection sections are used to validate detection results, then erroneous protection operations are prevented, but device complexity increases
Solution Approach 1:
The patent combines multiple detection sections and their validation logic into an integrated control apparatus with a unified determination section. This merging approach consolidates the complexity within a single control system rather than requiring separate independent systems, making the apparatus more manageable while maintaining the reliability benefits of multiple detection methods.
Solution Approach 2:
The determination section acts as an intermediary between the multiple detection sections and the control section. It receives detection results from various sections, validates their consistency, and only passes valid results to trigger protection operations. This intermediary layer simplifies the overall system architecture by centralizing the validation logic and preventing direct complex interactions between multiple detection paths.
Data Source
AI summary
A control apparatus and a control method are capable of preventing an erroneous protection operation from being performed. The control apparatus includes a plurality of detection sections each detecting the state of one of a plurality of batteries connected to an external load, a determination section that determines whether a detection result of each of the detection sections is valid, and a control section configured to control so as to perform a protection operation based on a determination result of the determination section. The determination section determines the validity of the detection result by comparing the detection results of the plurality of detection sections with one another, for example.