Dual-Battery SoC Estimation Using Adjusted Rated Capacity
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional mobile phones with dual batteries face challenges in accurately estimating the residual battery capacity and State of Charge (SoC), leading to inconvenient power-offs, especially when batteries have different properties and discharge at varying speeds.
Innovation Solution
A portable electronic device with a battery module comprising two batteries and a processor that determines an adjusted rated capacity based on the properties of each battery and system requirements, allowing for a linear presentation of residual battery capacity to the user, even when the battery voltage approaches the power-off level.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the total battery capacity is calculated as the summation of individual battery capacities, then the theoretical total capacity is maximized, but the residual battery capacity does not decrease linearly and sudden power-offs occur
Solution Approach 1:
The patent changes the parameter of rated capacity from a fixed value to an adjustable value. The processor dynamically adjusts the rated capacity parameter based on the actual discharge characteristics and voltage levels of the batteries, enabling the residual battery capacity to decrease linearly and preventing sudden power-offs.
2Duration of action of moving object
If dual batteries with different properties are used to extend battery life, then the duration of action is increased, but the discharging speeds vary and accurate SoC determination becomes difficult
Solution Approach 1:
The patent implements a feedback mechanism where the processor continuously monitors the voltage and discharge characteristics of each battery, and dynamically adjusts the rated capacity parameter based on this feedback. This enables accurate State of Charge determination despite the batteries having different discharge speeds, and ensures the residual battery capacity is presented linearly to the user.
Data Source
AI summary
A method for determining a State of Charge of a battery module with a first battery having a first rated capacity and a second battery having a second rated capacity including determining an adjusted rated capacity according to at least one of property data of the first battery, property data of the second battery and a system requirement, wherein the adjusted rated capacity is smaller than a summation of the first rated capacity and the second rated capacity; and determining a State of Charge (SoC) which indicates a level of charge of the battery module relative to a total capacity of the battery module according to the level of charge of the battery module and the adjusted rated capacity.