Rechargeable Battery Circuit Layout for IEC Voltage Compatibility
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Traditional lithium-ion batteries with embedded charging and discharging control circuits for GB/T 8897.2 (IEC 60086-2) standard compatibility face structural complexities, reducing mounting space and battery performance due to the need for a common ground connection between the battery and the control circuit, which affects discharging voltage compatibility and cycle life.
Innovation Solution
A discharging control method where the positive electrode of the lithium-ion cell is connected to the common ground end of the discharging control circuit, and the negative electrode is connected to the discharging control circuit input, allowing the discharging control circuit to convert the negative-electrode discharging voltage for external discharge, while the charging control method connects the positive electrode to the common ground end of the charging control circuit and the negative electrode to the charging control circuit input to manage charging voltage and current.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a common ground connection is used between the battery and control circuit, then discharging voltage compatibility with GB/T 8897.2 standard is achieved, but structural complexity increases and mounting space is reduced
Solution Approach 1:
The patent inverts the traditional ground connection configuration by making the positive electrode the common ground instead of the negative electrode. This allows the control circuit to share the positive electrode as a common reference point, eliminating the need for separate ground connections and reducing structural complexity while maintaining voltage compatibility
2Area of stationary object
If controller is arranged at the positive electrode end, then mounting space is increased, but this arrangement is not compatible with traditional control methods requiring common ground at negative electrode
Solution Approach 1:
The patent inverts the traditional control method by switching from negative-electrode-common-ground to positive-electrode-common-ground configuration. This enables the controller to be positioned at the positive electrode end, maximizing mounting space while maintaining full control functionality through the inverted reference configuration
3Adaptability or versatility
If independent charging and discharging circuits are integrated in each battery, then discharging voltage compatibility is improved, but device complexity and space requirements increase
Solution Approach 1:
The patent merges the charging and discharging control functions into a single controller unit that shares the positive electrode as a common ground. This integration reduces the number of separate circuits and components needed, lowering device complexity while maintaining the ability to provide independent control for both charging and discharging operations
Data Source
AI summary
A discharging control method and a charging control method for a rechargeable battery, and the rechargeable battery. An electric system of the rechargeable battery comprises a lithium ion cell and a discharging control circuit, and a charging control circuit. A positive electrode of the lithium ion cell is electrically connected to a common ground end (GND) of the charging and/or discharging control circuit, so that the common ground end (GND) serves as a positive electrode (P) of the charging input and/or discharging output of the rechargeable battery; a negative electrode of the lithium ion cell is electrically connected to an output end of the charging control circuit and an input end of the discharging control circuit; and the input end of the charging control circuit and the output end of the discharging control circuit are electrically connected to a negative electrode (N) of the rechargeable battery.