Wireless Charging Circuitry Using Adaptive Unregulated Current Pulses
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Solution Overview
Problem
Conventional battery charging methods require physical connection to a power source, limiting flexibility and efficiency.
Innovation Solution
The development of wireless charging circuitry using inductive coupling, which generates unregulated current and voltage pulses through full-wave or half-wave rectification, and adaptive charging techniques based on battery and system conditions, controlled by monitor and control circuitry to optimize charging processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional physical connection charging is used, then charging reliability is ensured, but charging flexibility and convenience are limited
Solution Approach 1:
The patent replaces the mechanical connection system (physical plug and socket) with an electromagnetic field-based wireless charging system. The charging base generates an alternating magnetic field through a coil that induces current in the battery's coil, enabling energy transfer without mechanical contact. This substitution maintains reliability through electromagnetic coupling while dramatically improving flexibility and convenience.
Solution Approach 2:
The patent introduces an alternating magnetic field as an intermediary medium to transfer energy between the charging base and battery. The magnetic field acts as a mediator that couples the transmitter coil in the base with the receiver coil in the battery, enabling wireless power transfer while maintaining controlled and reliable energy transmission.
2Device complexity
If unregulated current is applied directly to battery, then device complexity is reduced, but charging precision and safety are compromised
Solution Approach 1:
The patent employs dynamic pulse width modulation (PWM) control to regulate charging current. The control circuit dynamically adjusts the duty cycle of rectified pulses based on battery state feedback, enabling precise current control without complex continuous regulation circuits. This dynamic approach achieves charging precision while maintaining relatively simple circuit architecture.
Solution Approach 2:
The patent uses periodic rectified pulses instead of continuous current for charging. The AC signal is rectified into periodic pulses that are applied to the battery in controlled intervals. This periodic action simplifies the charging circuit by eliminating the need for complex continuous voltage regulation while maintaining effective charging through controlled pulse delivery.
3Productivity
If high current is applied to charge battery quickly, then charging speed increases, but battery safety and lifespan are compromised
Solution Approach 1:
The patent implements a feedback control mechanism where the control circuit continuously monitors battery parameters (voltage, current, temperature) and adjusts the charging pulse characteristics accordingly. When the battery approaches full charge or exhibits signs of stress, the system automatically reduces current or extends rest periods, preventing overcharging and thermal damage while maintaining high charging speed during the bulk charging phase.
Solution Approach 2:
The patent employs periodic charging pulses with built-in rest periods rather than continuous high current. The charging process alternates between charge pulses and rest intervals, allowing the battery to equilibrate and dissipate heat between pulses. This periodic approach enables high average charging current while preventing thermal runaway and extending battery lifespan through reduced stress.
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
Enables efficient, flexible, and adaptive wireless charging without physical connections, improving charging efficiency and safety by dynamically adjusting charging parameters based on battery and system conditions.
Implementation Method 1
a source coil employed to generate an alternating electromagnetic field from within a charge base
Implementation Method 2
the induction coil in the battery powered device (for example, via selection of or enable a tap output of/on the induction coil) which employs the power from the electromagnetic field and converts it back into electrical current
Data Source
AI summary
A wireless charging system for charging a battery may include wireless charging circuitry based on inductive coupling, where the wireless charging circuitry includes: control circuitry for adaptively charging or charging a battery/cell; and an output of the charging circuitry configured to apply an adapted, unregulated current and/or voltage to the battery. In certain embodiments, the adaptation of the unregulated current and/or voltage is based on the charging and/or operating conditions of the battery.