Battery Pack Adapter With Voltage Conversion for Bidirectional Power
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Solution Overview
Problem
Existing battery packs for power tools are limited in usage scenarios as they cannot be adapted to external electronic devices, and the chargers are complex, costly, and inconvenient to carry.
Innovation Solution
A combination of a battery pack and an adapter that includes a plug, alternating current input and output interfaces, direct current conversion circuits, and a two-way control module, allowing the battery pack to be charged from external power sources and used to power external devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a battery pack is designed to be adapted only to power tools, then it can ensure reliable power supply for the power tool, but it cannot be adapted to external electronic devices, limiting usage scenarios
Solution Approach 1:
The adapter is designed with multiple interfaces including a first adapter interface connected to the battery pack and a second adapter interface that can be selectively connected to either an external power supply device or an external power consumption device. This universal design enables the same adapter structure to serve multiple functions: charging the battery pack from external power sources and powering external devices from the battery pack, thereby expanding usage scenarios without requiring multiple specialized devices
Solution Approach 2:
The adapter acts as an intermediary device between the battery pack and external devices. It includes a voltage conversion circuit that mediates the voltage mismatch between the battery pack and external devices, and a two-way control module that mediates the bidirectional power flow control. This intermediary approach allows the battery pack to interface with various external devices without modifying the battery pack itself, resolving the contradiction between versatility and complexity
2Reliability
If a special charger is equipped for the battery pack, then it can ensure proper charging, but the charger has a relatively complicated structure, relatively high manufacturing costs, and is bulky and inconvenient to carry
Solution Approach 1:
The charging function is merged into the adapter rather than being a separate charger device. The adapter integrates the voltage conversion circuit and two-way control module that can handle both charging (when connected to external power supply) and discharging (when connected to external power consumption devices). This merging eliminates the need for a separate special charger, reducing device complexity and portability issues while maintaining reliable charging through the integrated voltage conversion and control mechanisms
Solution Approach 2:
The adapter serves multiple functions including charging the battery pack from external power sources, powering external devices from the battery pack, and providing voltage conversion and control for bidirectional power flow. By making the charger universal and multi-functional, it replaces the need for specialized chargers while ensuring proper charging through the integrated voltage conversion circuit and control module
3Adaptability or versatility
If the battery pack is used only with power tools, then the system can be simple, but it cannot power external electronic devices, limiting versatility
Solution Approach 1:
The adapter serves as an intermediary that handles the complexity of voltage conversion and bidirectional power flow control, allowing the battery pack to interface with various external devices without requiring the user to understand or manage the technical complexities. The two-way control module automatically manages the switching between charging and discharging modes, maintaining ease of operation while achieving broad device compatibility
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
The solution expands the usage scenarios of battery packs, making them more versatile and convenient by allowing charging from various power sources and powering external devices, while also simplifying the structure and reducing costs.
Implementation Method 1
an alternating current-direct current conversion circuit, and a direct current output interface. The plug is used for access to an alternating current. The alternating current input interface is electrically connected to the plug. The alternating current-direct current conversion circuit is electrically connected to the alternating current input interface and configured to convert the alternating current into a direct current
Implementation Method 2
The voltage conversion circuit is connected in series between the direct current interface and the adapter interface and configured to convert the direct current into an electric power output adapted to the battery pack
Implementation Method 3
The two-way control module is connected between the direct current interface and the adapter interface and connected to the voltage conversion circuit, where the two-way control module is configured to be capable of controlling a current direction and an output voltage of the voltage conversion circuit according to a signal state of the direct current interface and a signal state of the adapter interface
Data Source
AI summary
A combination includes a battery pack and an adapter. The battery pack includes a battery pack interface at least capable of being detachably connected to a power tool. A first adapter includes a plug, an alternating current input interface, an alternating current-direct current conversion circuit, and a direct current output interface. A second adapter is capable of being electrically connected to the first adapter and the battery pack. The second adapter includes an adapter interface, a direct current interface, a voltage conversion circuit, and a two-way control module. The direct current interface is configured to be detachably electrically connected to the direct current output interface. The voltage conversion circuit is connected in series between the direct current interface and the adapter interface. The two-way control module is connected between the direct current interface and the adapter interface and connected to the voltage conversion circuit.