Quick-Charging Circuit Selection for Minimum Heat Loss
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Solution Overview
Problem
Existing quick charging schemes for electronic devices, particularly those involving power management integrated circuits (PMIC) and 2:1 charge pumps, face complexity in current distribution due to PMIC shunting, leading to inaccurate modeling and potential inefficiencies in heat loss management.
Innovation Solution
A method and apparatus for determining a charging circuit by acquiring a preset equivalent circuit model with controllable devices, controlling their operating states to generate initial equivalent circuits, calculating charging currents, and determining the circuit with minimum heat loss as the target charging circuit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If a PMIC is integrated with a 3-LEVEL architecture for quick charging, then charging power exceeds 30 W, but the current distribution becomes complicated due to PMIC shunting and multiple parallel charging paths
Solution Approach 1:
The patent segments the complex charging circuit into multiple simplified equivalent circuit models, each representing a different charging path configuration. By dividing the overall charging system into discrete segments (different equivalent circuits), the patent enables independent analysis of each path's current distribution characteristics, thereby managing the complexity introduced by PMIC shunting and multiple parallel paths.
Solution Approach 2:
The patent changes the parameters of the equivalent circuit models by adjusting the resistance values of controllable devices in different configurations. By varying these resistance parameters across multiple equivalent circuits, the patent optimizes current distribution for each charging path configuration, enabling accurate current control despite the complexity of PMIC shunting and multiple parallel charging paths.
2Ease of manufacture
If the influence of PMIC shunting is ignored to simplify the model, then the model becomes simple and easy to solve, but the designed charging scheme is affected due to inaccurate current distribution
Solution Approach 1:
The patent creates multiple simplified equivalent circuit models that copy the essential characteristics of the complex charging system under different operating conditions. Each equivalent circuit model is a simplified copy that captures specific charging path configurations, making them easy to solve while collectively representing the full complexity of the system including PMIC shunting effects.
Solution Approach 2:
The patent introduces controllable devices with adjustable resistance values in the equivalent circuit models, making the models dynamic rather than static. This allows the equivalent circuits to adaptively represent different charging path configurations and PMIC shunting conditions, maintaining both simplicity for calculation and accuracy for current distribution prediction.
3Measurement precision
If multiple equivalent circuit models are used to account for PMIC shunting, then current distribution accuracy improves, but the design process becomes more complex
Solution Approach 1:
The patent creates a universal method that can handle multiple charging path configurations through a standardized set of equivalent circuit models. Each model serves multiple functions by representing different operating conditions of the same charging system, allowing accurate current distribution calculation across various PMIC shunting scenarios without requiring entirely separate design processes for each configuration.
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 simplifies the design process by reducing the number of equivalent circuit models needed and improving efficiency by identifying the charging circuit with the lowest heat loss, thus enhancing the design and operation of quick charging systems.
Implementation Method 1
a first resistance value is set for a first switch and a second resistance value is set for the first switch
Implementation Method 2
a first heat loss value of the first equivalent circuit is calculated based on the charging current in each charging path of the first equivalent circuit and a resistance value of each equivalent device in the equivalent circuit model
Data Source
AI summary
A method for determining a charging circuit, includes: acquiring a preset equivalent circuit model including a preset number of charging paths, wherein one or more of the preset number of charging paths includes a controllable device; controlling an operating state of each controllable device to obtain initial equivalent circuits each including respective different charging paths; acquiring a charging current in each charging path of each of the initial equivalent circuits in a charging state; for each of the initial equivalent circuits, acquiring a heat loss value of the initial equivalent circuit based on the charging current in each charging path of the initial equivalent circuit and a resistance value of each equivalent device in the equivalent circuit model; and determining one of the initial equivalent circuits having a minimum heat loss value under a same condition as a target charging circuit.