Cell Balancing Circuitry Synchronizes Energy Transfer
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Solution Overview
Problem
Existing battery pack technologies face inefficiencies in cell balancing, leading to uneven charging and discharging, which can result in reduced battery life and energy waste due to passive cell balancing methods that divert energy as heat rather than transferring it between cells.
Innovation Solution
The implementation of a cell balancing circuitry that synchronizes energy transfer between cells using a clock signal and control circuitry to monitor and adjust parameters such as voltage and impedance, allowing for active balancing that maintains energy within the battery pack.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If passive cell balancing is used to equalize cell voltages, then cell voltage uniformity is improved, but energy is wasted as heat instead of being transferred between cells
Solution Approach 1:
The patent introduces a balancing capacitor as an intermediary energy storage element between cells. The capacitor temporarily stores energy from cells with higher voltage and releases it to cells with lower voltage, enabling direct energy transfer between cells without converting to heat, thus resolving the contradiction between achieving voltage uniformity and minimizing energy waste
Solution Approach 2:
The patent changes the operating parameters of the balancing circuit by dynamically adjusting the switching frequency and duty cycle of the switches based on real-time cell voltage differences. This allows the system to optimize energy transfer efficiency and adapt to varying battery conditions, maintaining voltage uniformity while minimizing energy losses
2Loss of energy
If cell balancing circuitry is added to enable active balancing, then energy transfer efficiency is improved, but device complexity increases
Solution Approach 1:
The patent divides the battery pack into smaller groups of cells that can be balanced independently using shared balancing capacitors. This segmentation approach allows the complex balancing function to be implemented in a modular manner, reducing overall circuit complexity while maintaining high energy transfer efficiency across the entire battery pack
Solution Approach 2:
The balancing capacitors and control circuitry are designed to serve multiple functions: they enable energy transfer between cells, provide voltage monitoring capabilities, and can operate in different balancing modes (charge redistribution, equalization). This multi-functionality reduces the need for separate dedicated components, thereby reducing device complexity while improving energy transfer efficiency
3Measurement precision
If monitoring and control circuitry is implemented to adjust clock signal parameters, then balancing precision is improved, but device complexity increases
Solution Approach 1:
The patent implements a feedback control mechanism where cell voltage measurements are continuously monitored and fed back to the control circuitry. The control circuitry adjusts the clock signal parameters (frequency, duty cycle) based on this feedback to optimize energy transfer precision. This closed-loop feedback system achieves high balancing precision while using relatively simple control logic that adapts to real-time conditions
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach enhances battery pack efficiency by reducing the frequency of recharging, minimizing environmental impact, and extending battery life by transferring energy between cells rather than wasting it as heat, thereby improving the overall performance and longevity of the battery.
Implementation Method 1
cell balancing circuitry configured to transfer energy between cells of the battery pack in synchronisation with a clock signal
Data Source
AI summary
Circuitry for balancing cells in a battery pack, the circuitry comprising: cell balancing circuitry configured to transfer energy between cells of the battery pack in synchronisation with a clock signal; and control circuitry configured to control a parameter of the clock signal based on a monitored parameter or information associated with the battery pack.