Detachable EV Power Supply for Cross-Tool Battery Sharing
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Solution Overview
Problem
Existing riding mowers have battery packs that are not detachable, making them useless for powering other tools, and users must carry additional batteries for other power tools, which is inconvenient.
Innovation Solution
An electric vehicle with a detachable power supply device that includes a charger and a battery pack, allowing the battery pack to be used with other power tools and vice versa, and featuring a control unit that manages power distribution and charging priorities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the battery pack is integrated with the vehicle body, then the structural stability is improved, but the adaptability deteriorates because the battery pack cannot be used for other power tools
Solution Approach 1:
The power supply device is divided into separable components: the battery pack and the vehicle body integration structure. The battery pack can be detached from the vehicle body and used independently with other power tools, while the vehicle body maintains its structural integrity through the designed mounting interface.
Solution Approach 2:
The battery pack is designed with universal compatibility to serve multiple functions: it can power the electric vehicle, other power tools, or be charged independently. The standardized interface allows the same battery pack to be used across different devices, enhancing adaptability while maintaining structural stability when installed.
2Adaptability or versatility
If the battery pack is detachable, then the adaptability is improved, but the device complexity increases due to additional interfaces and control mechanisms
Solution Approach 1:
The charging function is extracted from the vehicle body and integrated into the detachable power supply device. The power supply device includes a charging portion with a docking interface that can charge the battery pack independently, eliminating the need for complex integrated charging control in the vehicle body.
Solution Approach 2:
The power supply device performs self-charging through the docking interface when connected to an external power source. The control unit automatically manages the charging process without requiring complex external control systems, reducing overall device complexity while maintaining adaptability.
3Loss of time
If the battery pack is used for multiple purposes, then the loss of time is reduced, but the manufacturing precision requirements increase to ensure compatibility
Solution Approach 1:
The docking interface is designed with localized precision features at critical contact points, while other parts of the battery pack and charger have standard tolerances. This focused approach to manufacturing precision ensures reliable electrical and mechanical connection without requiring ultra-precise manufacturing across the entire component.
Solution Approach 2:
The battery pack interface design uses standardized, homogeneous connection protocols and physical interfaces that match across different devices. This uniformity in interface design simplifies manufacturing precision requirements by using consistent tolerances and geometries across all docking interfaces.
4Ease of operation
If the power supply device is detachable, then the ease of operation is improved, but the reliability deteriorates due to potential connection issues
Solution Approach 1:
The battery pack is nested within a protective housing that includes the charging portion and control unit. When docked, the battery pack is securely retained within the power supply device structure, providing both easy removal when needed and reliable connection when docked, with the housing protecting against accidental disconnection.
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 detachable power supply system enhances user convenience by allowing the battery pack to be used across multiple tools and as an emergency power source, increasing the usage rate of the battery pack and reducing user costs.
Implementation Method 1
the inverter unit is used to invert the power obtained by the docking interface from the battery pack into alternating current
Implementation Method 2
the control unit controls the charging portion to charge the battery pack
Data Source
AI summary
The disclosure provides an electric vehicle. The electric vehicle includes: a vehicle body provided with a power input port and a power supply device. The power supply device includes a charger and a detachable battery pack. The charger includes a power interface for obtaining external power, a charging portion provided with a docking interface, an output part, and a control unit. The output part includes a first power output interface connected with the power input port to supply power to the electric vehicle. When the power interface is connected with the external power, the control unit controls the charging portion to charge the battery pack.