Battery Pack Data Link With Voltage Boosting Against EMI
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Solution Overview
Problem
Data transmission between a battery pack and an external device in electric tools is prone to failure due to external interference signals, such as electromagnetic interference, leading to communication disruptions.
Innovation Solution
A data transmission system with a boost unit or level shifter module that adjusts transmission voltages to a preset voltage greater than the initial transmission voltages, ensuring reliable data transfer by minimizing interference effects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If data transmission is carried out between battery pack and external device using standard transmission voltage, then the system structure remains simple, but data transmission fails due to external interference signals
Solution Approach 1:
The patent changes the transmission voltage parameter from standard voltage to boosted voltage (higher than standard voltage). The boost unit increases the transmission voltage to a higher level, which improves the signal-to-noise ratio and makes the data transmission more resistant to external interference signals, thereby solving the reliability issue without requiring complete system redesign
Solution Approach 2:
The patent introduces a boost unit as an intermediary component between the transmitting and receiving ends. This boost unit acts as a mediator that enhances the transmission voltage specifically for data communication purposes, while the rest of the system can remain relatively simple. The boost unit is the only component that needs to be added, minimizing the increase in overall system complexity
2Object-affected harmful factors
If boost unit is added to increase transmission voltage, then external interference resistance improves, but device complexity increases
Solution Approach 1:
The patent applies parameter changes by adjusting the transmission voltage to a higher level through the boost unit. This voltage enhancement directly improves the system's resistance to external interference signals, as the higher voltage signal is less susceptible to noise and interference during transmission
Solution Approach 2:
The boost unit serves as an intermediary that specifically addresses the interference resistance issue without requiring modification of the entire system. By placing the boost unit only in the data transmission path, the patent minimizes the increase in device complexity while achieving the desired improvement in interference resistance
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 system effectively prevents data transmission failures by boosting voltages to a higher preset level, thereby reducing the impact of external interference and ensuring stable communication between the battery pack and external devices.
Implementation Method 1
A boost unit is arranged between the first transceiving module and the second transceiving module. When the first transceiving module sends data to the second transceiving module or the second transceiving module sends data to the first transceiving module, the boost unit adjusts a transmission voltage of the data to a preset voltage. The preset voltage is greater than the first transmission voltage and the second transmission voltage.
Data Source
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Figure 5a~6b
AI summary
This application relates to the technical field of electric tools, and particularly discloses a data transmission system, a power supply apparatus and an external device. The system includes a battery pack and an external device. A first level shifter module in the battery pack carries out data transmission with a first processing module at a first transmission voltage, and a second level shifter module in the external device carries out data transmission with a second processing module at a second transmission voltage. When the first level shifter module sends data to the second level shifter module, the first level shifter module switches the first transmission voltage of the data to a preset voltage, and the second level shifter module switches the preset voltage to the second transmission voltage after receiving the data; or when the second level shifter module sends data to the first level shifter module, the second level shifter module switches a transmission voltage of the data to the preset voltage, and the first level shifter module switches the preset voltage to the first transmission voltage after receiving the data. The preset voltage is greater than the first transmission voltage and the second transmission voltage.