Wireless Power Receiver for Fully Discharged Battery Charging
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Solution Overview
Problem
Wireless charging systems face challenges when attempting to charge a fully discharged battery, as the battery cannot power the necessary circuitry to initiate the wireless handshake protocol, making it impossible to establish a charging configuration.
Innovation Solution
The implementation of a wireless charging standard protocol, such as A4WP or WPC, that includes a power logic component within the wireless power receiver to monitor and provide a low power level to the battery, allowing it to initiate a wireless handshake once it reaches a predefined threshold, using magnetic inductive coupling and components like rectifiers, DC-DC converters, and BLE modules to manage power and communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a wireless handshake protocol is used to establish charging configuration, then charging can be initiated, but fully discharged batteries cannot power the circuitry required for the handshake
Solution Approach 1:
The system performs preliminary actions by providing power to the battery before the wireless handshake protocol is executed. The power transmitter detects that the battery is in a discharged state and provides preliminary power through the Rx coil to charge the battery to a threshold level, enabling subsequent handshake operations.
Solution Approach 2:
The Rx coil serves as an intermediary component that can receive power from the Tx coil and provide it to the battery independently of the wireless handshake protocol. This intermediary power path allows the battery to be charged to operational levels without requiring the battery to initially power the handshake circuitry.
2Ease of operation
If power is provided to a discharged battery before handshake, then charging can be initiated, but the battery may be damaged by excessive power
Solution Approach 1:
The system applies partial action by providing only the minimum necessary power to charge the battery to the threshold level required for handshake operations, rather than providing full charging power. Once the threshold is reached, the system transitions to normal charging protocols, avoiding excessive power application that could damage the battery.
Solution Approach 2:
The system implements feedback by continuously monitoring the battery charge level during the preliminary charging phase. When the battery reaches the threshold level required for wireless handshake operations, the system automatically transitions from preliminary power provision to normal charging protocols, preventing overcharging and battery damage.
3Reliability
If wireless handshake is required for configuration, then charging safety is ensured, but discharged batteries cannot be charged
Solution Approach 1:
The system performs preliminary power provision to discharged batteries before the wireless handshake protocol is executed. This preliminary action enables batteries in any charge state, including fully discharged, to reach the threshold level required for safe handshake-based charging configuration.
Solution Approach 2:
The system achieves universality by accommodating batteries in all charge states through a two-phase charging approach. The first phase (preliminary power provision) handles discharged batteries, while the second phase (protocol-based charging) handles batteries with sufficient power, making the system universally compatible with all battery states.
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 the charging of fully discharged batteries by initiating a low-power sequence that prevents damage and allows the battery to reach a threshold for successful wireless handshake and configuration, ensuring safe and effective charging.
Implementation Method 1
Magnetic resonance wireless charging may employ a magnetic coupling between the Tx coil and the Rx coil
Data Source
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AI summary
Techniques for wireless charging in a system (100), method, and apparatus are described herein. An apparatus for charging at a wireless power receiver (104) may include logic (112). The logic (112) is configured to supply voltage received at the wireless power receiver (104) at a first power level to a battery (114) that is initially fully discharged, wherein the power of the first power level is received during a predefined interval of a fully discharged battery protocol. The logic (112) is to monitor a second power level available at the battery, and initiate a wireless handshake with a wireless power transmitter (102) inductively coupled (110) to the wireless power receiver (104) indicating configurations of the wireless power receiver (104) upon detection of the second power level meeting or exceeding a predefined threshold.