Battery Control Circuit for Independent Bare Cell Charging
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Solution Overview
Problem
Conventional battery systems with multiple batteries connected in series or parallel face issues of bias current and voltage problems, requiring uniform batteries and limiting performance utilization, and cannot meet diverse user requirements for multi-scenario use and fast charging.
Innovation Solution
A battery control circuit with a processor and charging links that determine charging policies based on individual bare cell types, using charging management chips and coulometers to manage charging and discharging independently, allowing for different charging modes for each cell to optimize performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a protection circuit is added to prevent overcharging and overheating, then battery safety is improved, but device complexity increases
Solution Approach 1:
The patent combines the protection circuit functions (overcharge protection, overheat protection, over-discharge protection) into an integrated control circuit that monitors multiple parameters simultaneously. The controller integrates multiple protection functions in one unit, reducing the need for separate discrete protection components while maintaining comprehensive safety coverage.
Solution Approach 2:
The control circuit is designed to perform multiple functions: charging control, overcharge protection, overheat protection, and over-discharge protection. This multi-functional approach allows a single circuit to handle various protection scenarios, reducing overall system complexity compared to having separate dedicated circuits for each protection function.
2Productivity
If charging current is increased to reduce charging time, then charging speed is improved, but heat generation increases causing overheating risks
Solution Approach 1:
The patent implements a feedback mechanism where the controller continuously monitors the battery temperature and adjusts the charging current accordingly. When temperature exceeds a predetermined threshold, the controller reduces or stops charging current to prevent overheating. This dynamic adjustment allows fast charging under normal conditions while ensuring safety when temperature rises.
Solution Approach 2:
The charging current is made dynamic rather than fixed. The controller adjusts charging current in real-time based on battery state (temperature, charge level). This dynamic control enables the system to optimize charging speed while preventing overheating, rather than using a constant high current that would always risk overheating.
3Device complexity
If simple charging control is used, then device complexity is reduced, but overcharging and over-discharging protection is insufficient
Solution Approach 1:
The patent implements preliminary protection actions by setting predetermined thresholds for charging voltage, discharge voltage, and temperature before dangerous conditions occur. The controller proactively monitors these parameters and takes preventive action (stopping or reducing current) when thresholds are approached, preventing overcharging, over-discharging, and overheating before they can damage the battery.
Data Source
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AI summary
This application provides a battery control circuit, an electronic device, and a charging control method. The battery control circuit is configured to control charging and discharging of a battery. The battery control circuit includes a processor and one or more charging links. The battery includes one or more bare cells. The charging link is electrically connected to the bare cell and the processor. The processor determines, based on a type of the bare cell, a charging policy to be performed by the charging link. In the foregoing design, several bare cells are integrated in one battery, so that different bare cells have independent charging and discharging functions. This can fully utilize performance of the battery.