Inductive Power Pack Charging ASIC Design
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Solution Overview
Problem
Existing inductive charging systems for power packs compromise the size and capacity of battery cells due to the need for separate electronic blocks for control circuitry, leading to bulky and inconvenient charging solutions.
Innovation Solution
A simplified, low-profile electronic system for inductive charging using an Application-Specific Integrated Circuit (ASIC) that integrates power transfer control, communication, and protection within the power pack, including a secondary inductor, magnetic flux guide, and rectification unit, while minimizing circuit blocks and overall dimensions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If separate electronic blocks are incorporated into the battery pack housing for inductive charging control, then inductive charging functionality is achieved, but the size of the battery and its capacity are compromised
Solution Approach 1:
The patent combines multiple separate electronic blocks (control circuitry, rectification, regulation) into a single integrated inductive power receiver unit that can be externally attached to the battery pack. This merging approach provides inductive charging functionality without requiring internal space modifications to the battery pack housing, thereby preserving battery capacity while achieving the desired adaptability.
2Adaptability or versatility
If separate electronic blocks are incorporated into the battery pack housing for inductive charging control, then inductive charging functionality is achieved, but the overall dimensions and profile of the power pack increase
Solution Approach 1:
The patent segments the inductive charging system into two separate parts: a compact inductive power receiver unit that attaches externally to the battery pack, and the main battery pack itself. This segmentation allows the battery pack to maintain its original compact dimensions while the receiver unit provides the necessary inductive charging functionality in a separate, space-efficient manner.
3Reliability
If sophisticated electronic circuitry is provided to control power transfer and monitor battery conditions, then charging control and protection are improved, but heat generation and device complexity increase
Solution Approach 1:
The patent introduces a magnetic shield as an intermediary component between the inductive power receiver and the battery pack. This magnetic shield serves multiple functions: it directs magnetic flux to improve charging efficiency, shields the battery from electromagnetic interference, and reduces heat generation by preventing direct exposure to the electromagnetic field. This intermediary approach enhances reliability while managing the complexity of the electronic system.
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 reliable, efficient, and compact inductive charging of power packs with enhanced protection against overcurrent, overvoltage, and temperature conditions, maintaining battery capacity and reducing heat generation for smaller form factors.
Implementation Method 1
a secondary inductor for inductively coupling with a primary inductor of the inductive power supply
Implementation Method 2
at least one magnetic shield for guiding magnetic flux away from the electrochemical cell
Implementation Method 3
The system may include a rectification unit for providing rectified direct current power from an alternating current supply
Data Source
AI summary
An inductively enabled power pack charging system and method includes an integrated circuit for controlling inductive transfer of power to the power pack and managing communication with an external power source. The system may further include an electrochemical cell for storing energy received from the external power supply and magnetic shielding material for guiding magnetic flux away from the electrochemical cell.