Battery Protection Circuit Shipping Mode for Low Storage Drain
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Solution Overview
Problem
Battery packs in electronic devices often discharge completely during transportation and storage due to internal current consumption, leading to a poor user experience as users must recharge them upon first use.
Innovation Solution
A battery protection circuit with a shipping mode that powers off non-essential sub-circuits to reduce power consumption, featuring a shipping input terminal that triggers the entry into shipping mode, a wake-up sub-circuit to exit this mode, and a first switch sub-circuit using a MOS transistor to control power supply to the system circuit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the battery protection circuit remains fully operational during transportation and storage, then the battery can provide power when needed, but the battery discharges completely due to internal current consumption
Solution Approach 1:
The battery protection circuit dynamically changes its operational state based on external signals. During transportation and storage, the circuit enters a low-power shipping mode where non-essential sub-circuits are powered off, reducing internal current consumption. When a wake-up signal is detected (such as a charging connection), the circuit transitions back to full operational mode, ensuring power availability when needed.
Solution Approach 2:
The circuit changes its power consumption parameters by switching between different operational modes. In shipping mode, the power consumption parameter is reduced by powering off non-essential sub-circuits. In normal operational mode, all sub-circuits are fully powered to ensure proper battery protection and functionality. This parameter change resolves the contradiction between power retention and power availability.
2Reliability
If all sub-circuits remain powered on to ensure battery protection functionality, then the battery can be protected from overcharge and over-discharge, but the current consumption increases during storage
Solution Approach 1:
The battery protection circuit is segmented into essential and non-essential sub-circuits. Essential sub-circuits (such as basic protection functions) remain powered on to maintain battery safety, while non-essential sub-circuits (such as communication and display functions) are powered off during shipping mode. This segmentation allows the circuit to maintain minimum protection functionality while significantly reducing current consumption during storage.
3Duration of action of stationary object
If the battery protection circuit enters shipping mode to reduce power consumption, then the battery power retention time increases, but the device cannot be used immediately upon activation
Solution Approach 1:
The circuit is designed to detect wake-up signals (such as charging connections or button presses) and automatically transition from shipping mode to normal operational mode. This preliminary detection and automatic transition mechanism ensures that the device can be used immediately upon activation without requiring manual configuration or extended charging time, thus minimizing the loss of time to first use while maintaining extended power retention during storage.
Data Source
AI summary
A battery protection circuit, which includes: a power supply terminal, a power ground terminal, an overcharge voltage protection sub-circuit, an over-discharge voltage protection sub-circuit, a discharge over-current protection sub-circuit, a reference voltage generation sub-circuit, a frequency generation sub-circuit, a controller and a first switch sub-circuit. The battery protection circuit further includes a shipping input terminal, the battery protection circuit is configured to enter a shipping mode when a first signal is received at the shipping input terminal, and in the shipping mode, at least one sub-circuit of the battery protection circuit is powered off. The present application also provides a battery pack and an electronic device, advantages of the present application include that the current consumption of the battery during transportation and storage can be reduced, and the power retention time of the battery can be increased, so that the user’s experience can be improved.