Battery operated cleaning apparatus and method for operating a cleaning apparatus
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Solution Overview
Problem
Battery-operated cleaning devices, particularly those using lithium-ion batteries, face challenges in accurately displaying the charge status due to the battery voltage being independent of the charging state, unlike lead batteries where voltage directly correlates with charge level.
Innovation Solution
Incorporating an electrical signal conversion device that converts a digital state of charge signal from the battery into an analog signal, which is then transmitted to the display control device, allowing for the use of various battery types without modifying the display or control devices, and including a battery management system for precise charge monitoring.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If a lithium-ion battery is used instead of a lead-acid battery, then the energy density and operating time are improved, but the charge level display becomes unreliable because the battery voltage is independent of the charge level
Solution Approach 1:
The patent introduces a signal conversion device as an intermediary component between the lithium-ion battery and the display control device. This converter transforms the digital charge state signal from the battery management system into an analog charge level signal that the display device can process, thereby enabling accurate charge level display while maintaining the benefits of lithium-ion battery operation
Solution Approach 2:
The patent changes the signal parameter type from digital to analog through the signal conversion device. By converting the digital charge state signal into an analog charge level signal with voltage proportional to the charge state, the system adapts to the display control device's existing analog signal processing capability while accurately representing the battery's charge level
2Device complexity
If the display control device is designed for lead-acid batteries with voltage-dependent charge indication, then the device complexity is reduced, but the adaptability to different battery types is limited
Solution Approach 1:
The signal conversion device serves as a mediator that enables compatibility between lithium-ion batteries and display control devices originally designed for lead-acid batteries. This intermediary component allows the existing display control device to work with different battery types without requiring modification to its internal circuitry or logic
Solution Approach 2:
The patent achieves universal battery compatibility by introducing a universal interface layer (the signal conversion device) that translates between different battery signal types. This allows the same cleaning device to operate with both lead-acid and lithium-ion batteries, enhancing versatility without increasing the complexity of the core display control device
Data Source
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AI summary
To improve a battery-operated cleaning device, in particular a floor cleaning device, which can be operated independently of the mains power supply using a battery, wherein the cleaning device includes a display device for indicating the battery's state of charge, wherein the cleaning device includes a display control device for controlling the display device depending on an analog state of charge signal corresponding to the battery's state of charge, and wherein the display control device includes an analog signal input for receiving the analog state of charge signal from the battery, in such a way that the battery's state of charge can be reliably displayed during operation of the cleaning device, in particular regardless of the battery type used, it is proposed that the cleaning device include an electrical signal conversion device for converting a signal provided by the battery,The digital charge level signal corresponding to the battery's state of charge is converted into an analog charge level signal corresponding to the battery's state of charge. The signal conversion device includes an analog signal output, and this analog signal output is electrically connected to the analog signal input of the display control device for transmitting the analog charge level signal from the signal conversion device to the display control device. Furthermore, an improved method for operating a cleaning device is proposed.