Battery Pack Communication Circuit for Noise Current Blocking
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing battery-powered systems face issues with inaccurate data communication due to noise currents flowing in the closed loop between the battery pack and electrical equipment, which can degrade signal integrity and lead to erroneous data reception.
Innovation Solution
Implementing noise current limiting circuits in both the battery pack and connected equipment to restrict the flow of noise currents in reverse directions, while allowing signal transmission to proceed uninterrupted.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If serial communication is performed via communication terminals in a closed loop between battery pack and power tool, then data communication is enabled, but noise currents flow in the closed loop degrading signal integrity
Solution Approach 1:
A diode is introduced as an intermediary component in the communication terminal circuit. The diode allows data signals to pass through in the forward direction while blocking reverse current flow that would create noise in the closed loop. This mediator component selectively permits useful signal transmission while preventing harmful noise current circulation.
Solution Approach 2:
The harmful reverse current path is extracted and isolated from the communication circuit by using the diode's directional conductivity. The diode effectively removes the possibility of reverse current flowing through the closed loop formed by the communication terminals, separating the useful forward signal path from the harmful reverse current path.
2Reliability
If noise current limiting circuits are added to limit reverse current flow, then signal integrity is improved, but device complexity increases
Solution Approach 1:
A simple diode, which is a low-cost and widely available component, is used to implement the noise current limiting function. The diode provides reliable reverse current blocking without requiring complex circuitry, achieving the desired signal integrity protection through a simple, inexpensive component that is standard in electronic design.
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 design ensures accurate data communication by limiting noise currents, thereby maintaining signal integrity and enabling reliable data exchange between the battery pack and electrical equipment.
Implementation Method 1
a first noise current limiting circuit configured to limit a flow of noise current in a reverse direction
Data Source
AI summary
A battery-powered system includes a battery pack (10; 71; 81) connected to an electrical equipment (30; 50; 76; 86). The battery pack includes a first positive electrode terminal (11), a first negative electrode terminal (12), a first communication terminal (13), a first data input circuit (23), and a first limiting circuit (D11; D72; D82) that limits a flow of electric current in a direction from the first negative electrode terminal to the first communication terminal via the first data input circuit. The connected equipment includes a second positive electrode terminal (31; 51), a second negative electrode terminal (32; 52), a second communication terminal (33; 53), a second data input circuit (43; 63; 77; 87), and a second limiting circuit (D31; D51; D77; D87) that limits a flow of electric current in a direction from the second negative electrode terminal to the second communication terminal via the second data input circuit.