Lithium Battery Pack Charging Controller with Identification Circuit
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Solution Overview
Problem
Existing lithium battery pack charging systems require complex parameter determination before charging, necessitating prior information about the battery cells, limiting efficiency and safety.
Innovation Solution
Integration of a charging controller within the battery pack that identifies cell data using sensors and adjusts the AC/DC circuit to provide accurate charging parameters, along with a protection module for safe charging and discharging, allowing a common adapter to charge packs with varying cell counts and parameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a common charger outputs power with constant current or constant voltage for charging a battery pack, then the charging process is simple, but the charger can only charge a corresponding battery pack and cannot adapt to different battery packs
Solution Approach 1:
The charging controller is designed to identify and adapt to different battery pack types automatically. It reads battery information from identification circuits, determines appropriate charging parameters, and controls the charging process accordingly. This enables a single charger to universally charge multiple battery pack types without requiring different chargers for each battery type.
Solution Approach 2:
The battery pack includes an identification circuit that automatically provides its type information to the charging controller. The charging controller then automatically determines the correct charging parameters based on this information, eliminating the need for manual configuration or complex user intervention. The system serves itself by automatically adapting to the connected battery pack.
2Measurement precision
If a charger provides different charging parameters based on battery cell information, then charging accuracy is improved, but the charger needs to obtain relative information before charging which makes the process complex
Solution Approach 1:
The battery pack's identification circuit pre-stores and provides battery type information before the charging process begins. The charging controller reads this information in advance, determines the appropriate charging parameters beforehand, and then executes the charging process. This preliminary identification and parameter determination simplifies the overall charging process while maintaining high accuracy.
Solution Approach 2:
The identification circuit acts as an intermediary between the battery pack and the charging controller. It automatically transmits battery type information to the charging controller, which then uses this information to determine precise charging parameters. This intermediary mechanism simplifies communication and parameter determination compared to direct complex interactions.
3Reliability
If the charging controller identifies initial data of battery cells through sensors, then charging safety and accuracy are improved, but the system requires more components
Solution Approach 1:
The charging controller integrates multiple functions including battery identification, parameter determination, charging control, and safety monitoring into a single control unit. Sensors for detecting battery state are combined with the control logic. This merging reduces the number of separate components while maintaining comprehensive safety and accuracy functions.
Solution Approach 2:
The battery pack's protection circuit automatically monitors battery state and provides protection without external intervention. The identification circuit automatically provides battery information to the charging controller. These self-service functions improve safety while minimizing the need for additional complex external monitoring systems.
Data Source
AI summary
A lithium battery pack according to the present invention has inherent information stored therein, which comprises a plurality of cells, nominal voltage, maximal voltage of the cells, range of temperature etc. A charging parameter is determined by a charging controller based on an identified data of the cells and the inherent information, and is transmitted to an adapter. A controlled module in the adapter receives the charging parameter through a control terminal and adjusts an AC/DC circuit to output a current with accurate charging voltage to the battery pack.