Handheld Flashlight Power Circuit for 6V/12V/24V Jump Starting
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Solution Overview
Problem
Traditional emergency response devices, such as jump starters, fail to function effectively in non-ideal conditions (low temperatures) and are not suitable for vehicles with different voltage requirements (6V/12V/24V).
Innovation Solution
A handheld flashlight with multiple power supply assemblies and a switch control circuit that allows for outputting various voltages (6V, 12V, 24V) and temperature regulation, using MOS transistors and a microcontroller to manage series/parallel connections of lithium iron phosphate batteries.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional jump starters are used, then they can jumpstart a car when conditions are ideal, but they fail to function effectively in non-ideal conditions (low temperatures) and are not suitable for vehicles with different voltage requirements
Solution Approach 1:
The patent implements a multi-functionality approach by designing a single emergency response device that can adapt to multiple voltage requirements (6V, 12V, 24V vehicles) through a controllable power supply assembly. The device includes voltage selection switches and control circuits that enable it to function across different voltage systems, making one device universally applicable to various vehicle types rather than requiring separate devices for each voltage level.
Solution Approach 2:
The patent applies parameter changes by enabling the power supply assembly to dynamically adjust its output voltage parameters based on the connected vehicle's requirements. The control circuit detects the vehicle's voltage system and modifies the power supply output accordingly, allowing the same device to reliably function across different voltage conditions and temperature ranges by changing its electrical parameters in real-time.
2Adaptability or versatility
If traditional jump starters are used, then they are simple in design, but they cannot supply power to batteries in any weather condition or at various voltages
Solution Approach 1:
The device achieves weather condition adaptability through integrated temperature sensing and power management circuits that automatically adjust operation based on environmental conditions. The power supply assembly is designed to function across a wide temperature range, and the control circuit selectively activates appropriate functions based on detected conditions, providing universal adaptability to various weather scenarios.
Solution Approach 2:
The patent implements self-service through automatic voltage detection and selection mechanisms. The control circuit automatically detects the vehicle's voltage system and configures the power supply assembly accordingly without requiring manual intervention. The device also includes automatic protection features that monitor temperature and current conditions, adjusting operation or shutting down as needed to prevent damage, making the system self-regulating and reducing the need for complex external control.
Data Source
AI summary
A handheld flashlight includes a hollow cylinder having a first end and a second end, and a rechargeable battery therein. The handheld flashlight further includes a lamp head with a light source, a window breaker, a charging port and a discharging port, selectively connected to an external power source or an external load; a connection port, selectively connected to positive and negative terminals of a vehicle battery through external cables; and a management circuit, selectively applying power from the battery to one or more of the light source, the discharging port, and the connection, and selectively charging the battery from the external power source through the charging port; wherein the handheld flashlight is of such compact size and low weight as to be suitable for single-handed portable operation by a user.