Removable USB Battery Pack for Lighting Device
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Solution Overview
Problem
Existing lighting devices with built-in batteries lack convenience and endurance due to the inability to replace batteries easily, and often suffer from unstable power supply if batteries are not installed correctly or if mismatched batteries are used, potentially leading to device damage.
Innovation Solution
A lighting device design featuring a removable battery pack with a universal serial bus (USB) interface that includes a switch circuit with MOS transistors for controlled power transmission, ensuring proper alignment and connection between the battery pack and light body, and a conductive piece for secure contact, allowing for easy battery replacement and preventing damage from improper installation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a built-in battery is used in the lighting device, then the device structure is simplified and integration is improved, but the battery cannot be replaced when depleted, reducing convenience and endurance performance
Solution Approach 1:
The lighting device is divided into two separable parts: a light body and a battery pack. The battery pack can be freely removed and replaced, allowing users to extend usage by simply swapping batteries rather than charging the entire device. This segmentation resolves the contradiction by maintaining structural simplicity while enabling easy battery replacement.
2Adaptability or versatility
If two interfaces (charging interface and discharging interface) are arranged on the battery, then charging and discharging functions are satisfied, but the device complexity and interface arrangement become more complicated
Solution Approach 1:
The battery pack uses a universal USB interface that can perform both charging and discharging functions. The interface includes power transmission terminals and data transmission terminals that can identify the charging/discharging state and automatically switch roles. This multi-functional design eliminates the need for separate charging and discharging interfaces, reducing complexity while maintaining versatility.
3Device complexity
If automatic identification of correct battery installation is not implemented, then the device structure is simpler, but unstable current supply can damage the lighting device when batteries are improperly installed
Solution Approach 1:
The USB interface includes data transmission terminals that establish bidirectional communication between the light body and battery pack. Through this feedback mechanism, the system automatically identifies whether the battery is installed correctly and whether it is a matched battery. The interface can detect the battery's voltage and current specifications and compare them with the device's requirements, providing feedback to control the power transmission accordingly.
Solution Approach 2:
Before power transmission begins, the system performs preliminary identification through the data transmission terminals to detect improper battery installation or mismatched batteries. This preliminary anti-action prevents unstable current supply and potential device damage by identifying issues before they cause harm, rather than waiting for damage to occur.
4Ease of operation
If a removable battery pack with USB interface and switch circuit is used, then battery replacement convenience and device protection are improved, but the device complexity increases
Solution Approach 1:
The USB interface is designed to perform multiple functions: power transmission, data communication, and automatic identification of charging/discharging states. The switch circuit uses the data transmission terminals to control power transmission based on the identified state. This multi-functional design reduces the need for separate dedicated components, thereby reducing overall complexity despite the added capabilities.
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 enables convenient battery replacement, ensures stable power supply by ensuring correct battery installation, and prevents damage from mismatched batteries, enhancing the endurance and reliability of the lighting device.
Implementation Method 1
the second data transmission terminal is coupled to a switch circuit which is configured to switch on power transmission from the power supply to the second power terminal when the second data transmission terminal is at a low level. The switch circuit comprises a first metal oxide semiconductor (MOS) transistor
Data Source
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AI summary
A lighting device having a removable battery pack is provided. The lighting device comprises a light body and a battery pack. The light body comprises a light-emitting unit and a first universal serial bus (USB) interface electrically coupled to the light-emitting unit. The battery pack comprises a power supply and a second universal serial bus (USB) interface electrically coupled to the power supply. The first USB interface comprises a first data transmission terminal configured for establishing data communication with the second USB interface and a first power terminal for supplying power to the light-emitting unit; the second USB interface comprises a second data transmission terminal for establishing data communication with the first USB interface and a second power terminal for supplying power to the first power terminal. The first data transmission terminal is grounded, and the second data transmission terminal is coupled to a switch circuit.