Mixer Drum Electric Drive with External Battery Charging Isolation
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Solution Overview
Problem
Existing electric drive systems for mixer drums in truck mixers are coupled to the vehicle's drive train, leading to safety issues and complex monitoring requirements.
Innovation Solution
An electric drive system for a mixer drum utilizing a high-voltage DC voltage power supply connected to batteries, a power converter, and an external interface for stationary power supply, with a controller managing energy flows, allowing battery charging only through the external interface, thereby decoupling the mixer drive from the vehicle's drive train.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the electric drive system is coupled to the vehicle's drive train, then the mixer drum can be driven using the vehicle's power generation system, but safety issues arise and monitoring complexity increases
Solution Approach 1:
The electric drive system is segmented into two independent parts: the vehicle's drive train with its own generator and battery, and the mixer drum drive with its separate battery charged only via external interface. This segmentation eliminates the safety issues and monitoring complexity caused by coupling while maintaining the ability to operate the mixer drum electrically.
2Device complexity
If the battery is charged through the vehicle's power system, then charging infrastructure is simplified, but the electric drive becomes dependent on the drive train
Solution Approach 1:
An external charging interface serves as an intermediary between the battery and the power supply. Instead of charging through the vehicle's drive train, the battery connects to stationary power supplies or external generators via this interface, maintaining independence while enabling flexible charging options.
3Ease of manufacture
If the generator is designed for the on-board electrical system only, then generator design is simplified, but the mixer drum cannot share power generation resources
Solution Approach 1:
The external charging interface provides multi-functionality by accepting various external power sources (stationary power supplies, external generators) to charge the battery. This universal interface enables power sharing capabilities without complicating the vehicle's onboard generator design, as the generator only needs to serve the vehicle's electrical 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
This solution eliminates safety-related issues, simplifies the generator design and cabling, and reduces monitoring complexity, as the electric drive for the mixer drum operates independently of the vehicle's drive train.
Implementation Method 1
at least one battery, a power converter and at least one external interface for connecting a stationary electric power supply are connected
Data Source
AI summary
An electric drive for a mixer drum, including a high-voltage DC voltage power supply to which at least one battery, a power converter and at least one external interface for connecting a stationary electric power supply are connected. The at least one battery is charged only via the at least one external interface, wherein a controller is configured to control flows of energy from and to components connected to the high-voltage DC voltage power supply.