Battery Switch Isolation for Low-SOC Standby Storage
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Solution Overview
Problem
Existing battery systems struggle to maintain a long storage time when the state of charge (SOC) is low and external charging is unavailable, as the battery management system continues to consume power even in sleep mode, leading to reduced storage duration.
Innovation Solution
Incorporating a switch unit between the battery management system and the battery unit, which switches off the electrical connection when the SOC is below a preset threshold and no charging current is available, reducing power consumption and allowing the battery system to conserve energy until external charging is possible.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the battery management system enters sleep mode to reduce power consumption, then power consumption is reduced, but the battery system still cannot maintain long storage time under low SOC conditions
Solution Approach 1:
The patent extracts the battery management system from the main power supply connection by introducing a switch unit. When SOC is low and no external charging is available, the switch unit disconnects the battery management system from the battery unit, completely removing its power consumption from the system. This goes beyond sleep mode by fully isolating the power-consuming component.
Solution Approach 2:
The system uses its own state information (SOC level and charging status) to automatically control the switch unit. The battery management system monitors its own state and triggers the disconnection when conditions indicate it should conserve energy, making the system self-regulating without external intervention.
2Reliability
If the battery management system remains connected to monitor battery status, then battery status monitoring is maintained, but power consumption increases and storage time decreases
Solution Approach 1:
The system dynamically adjusts the connection state of the battery management system based on real-time conditions. The switch unit transitions between connected and disconnected states according to SOC levels and charging availability, making the monitoring capability conditional rather than constant. This dynamic adjustment optimizes the balance between monitoring reliability and energy conservation.
Solution Approach 2:
Instead of continuous monitoring, the system implements periodic or conditional monitoring through the switch unit. The battery management system is activated for monitoring only when SOC is sufficient or external charging is available, and remains inactive otherwise. This transforms continuous monitoring into a periodic action that consumes energy only when necessary.
Data Source
AI summary
An electrochemical apparatus includes a battery management system, a battery unit, and a switch unit. The switch unit is electrically connected between the battery management system and the battery unit. The battery management system is configured to obtain a state of charge of the battery unit; and under a condition that the state of charge is less than a preset threshold and the electrochemical apparatus has not obtained a charging current transmitted by an external charging device, the battery management system outputs a first signal to the switch unit, and the switch unit switches off an electrical connection between the battery unit and the battery management system according to the first signal.