Battery Voltage Detection Circuit for Line Connection Abnormalities
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Solution Overview
Problem
Conventional battery systems face errors in detecting connection abnormalities in voltage detection lines due to voltage variations between different timing measurements, leading to inaccurate determination of line connectivity.
Innovation Solution
A voltage detection circuit with a first terminal connected through a resistor to one end of the voltage detection line, a second terminal without the resistor, and a current generating circuit, which allows for simultaneous voltage detection at both terminals to determine connection abnormalities based on voltage differences.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If voltage detection is performed at different timings (before and after capacitor discharge), then connection abnormality can be detected, but voltage variations during the period cause determination errors
Solution Approach 1:
The patent merges the voltage detection operations into a single simultaneous measurement by detecting voltages at both terminals at the same timing, rather than performing separate measurements before and after capacitor discharge. This eliminates the time gap that causes voltage variations and determination errors.
Solution Approach 2:
The patent performs preliminary action by detecting the voltage at the first terminal through the resistor before the voltage detection line connects to the battery, and simultaneously detecting the voltage at the second terminal without the resistor, so that both measurements are completed before any voltage variation can occur during capacitor discharge.
2Reliability
If multiple timing measurements are performed, then connection abnormality detection is possible, but the complexity of multiple detection operations increases
Solution Approach 1:
The patent combines multiple detection operations into a single simultaneous detection process. By detecting voltages at both terminals at the same timing, the system maintains the ability to detect connection abnormalities while reducing the operational complexity of performing separate measurements at different timings.
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 approach reduces the likelihood of errors in determining voltage detection line connection abnormalities by eliminating the need for multiple timing measurements, providing precise detection of line connectivity issues.
Implementation Method 1
The voltage detector includes at least one first AD converter connected to the first terminal, and at least one second AD converter connected to the second terminal
Implementation Method 2
a first terminal for connecting to one end of a first voltage detection line through a first resistor
Data Source
AI summary
A voltage detection circuit includes a first terminal for connecting to one end of a first voltage detection line through a first resistor, the first voltage detection line having another end connected to a cathode or an anode of a first individual battery; a second terminal for connecting to the one end of the first voltage detection line without the first resistor; a first current generating circuit connected to the first terminal; and a voltage detector which detects a voltage of the first terminal and a voltage of the second terminal. The voltage detector includes at least one first AD converter connected to the first terminal, and at least one second AD converter connected to the second terminal.