Battery Relay Control for Engine Start Reliability
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Solution Overview
Problem
Existing electric storage apparatuses, such as vehicle batteries, face power consumption issues when the engine is stopped, leading to a decrease in state of charge, potentially preventing engine startup due to external system reliance for power management.
Innovation Solution
An electric storage apparatus with an integrated monitoring system, including a detector and controller, that manages the battery's charge independently by switching a relay's state based on detected charge levels, reducing power consumption through varying power modes and preventing overcharge.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the battery voltage reaches a predetermined value, then the relay is shut down to prevent battery depletion, but the system requires communication means between the battery and external system which increases device complexity
Solution Approach 1:
The battery management system performs self-monitoring and self-control by detecting battery voltage internally and autonomously controlling the relay switch based on detected values, eliminating the need for external communication means while maintaining reliable battery charge level maintenance
Solution Approach 2:
The monitoring and control functions are extracted from the external system and integrated directly into the battery management system, allowing the battery to independently manage its charge level without requiring communication infrastructure with external systems
2Reliability
If the relay is controlled by an external system, then power management can be centralized, but the battery may not respond quickly enough to prevent depletion below engine activation threshold
Solution Approach 1:
The battery management system autonomously detects battery voltage and controls the relay switch without external intervention, enabling immediate response to voltage changes and ensuring the battery remains above the engine activation threshold with minimal response time
Solution Approach 2:
The system proactively monitors battery voltage and activates the relay switch before the battery voltage drops to the engine activation threshold, preventing depletion rather than merely responding to critical low-voltage conditions
3Ease of operation
If the battery supplies power to on-vehicle devices when the engine is stopped, then device functionality is maintained, but the state of charge decreases and may prevent engine startup
Solution Approach 1:
The battery management system continuously monitors battery voltage and uses this feedback to control the relay switch, dynamically adjusting power supply to on-vehicle devices based on real-time battery charge levels to ensure engine startup capability is maintained
Solution Approach 2:
The relay switch is dynamically controlled based on detected battery voltage values, allowing the system to adaptively manage power distribution between on-vehicle devices and maintain sufficient charge for engine startup under varying operating conditions
Data Source
AI summary
A battery includes an output terminal, an electric storage device, a relay connected to the output terminal and the electric storage device, and a monitoring apparatus including a detector and a controller, the detector being configured to detect a variation value corresponding to an amount of charge of the electric storage device, the controller receiving an engine activation signal and switching a state of the relay to a closed state. If an engine is not started, the controller switches the state of the relay to an open state.