Battery Voltage Measurement Circuit Using Alternating Capacitor Loop
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Solution Overview
Problem
The existing circuit for measuring battery voltage suffers from measurement errors due to residual charges in capacitors and requires excessive time as the number of voltage sources increases, as it relies on a single capacitor for voltage measurement across multiple sources.
Innovation Solution
A circuit using multiple capacitors forming a closed loop, where each capacitor is alternately charged and discharged to prevent residual charge errors, allowing for simultaneous measurement of voltages from multiple sources, reducing the overall measurement time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single capacitor is used to measure voltage of each voltage source sequentially, then the circuit structure is simple, but residual charges accumulate in the capacitor causing measurement errors
Solution Approach 1:
The patent divides the single capacitor into multiple capacitors (first capacitor and second capacitor) that operate in alternating sequence. Each capacitor serves as an independent measurement element, allowing one to discharge while the other measures, thereby eliminating residual charge accumulation and improving measurement precision without significantly increasing circuit complexity.
2Productivity
If the capacitor is discharged for each period to enable next voltage measurement, then measurement can be continuous, but the discharge time increases the total measurement time
Solution Approach 1:
The patent implements periodic action by alternating between two capacitors in a cyclic manner. While one capacitor is being discharged, the other is performing voltage measurement, and vice versa. This periodic switching allows measurements to proceed without waiting for complete discharge cycles, significantly reducing the time loss associated with capacitor discharge and improving overall measurement productivity.
3Ease of operation
If multiple voltage sources are measured sequentially using a single capacitor, then the measurement process is straightforward, but the total measurement time increases with the number of voltage sources
Solution Approach 1:
The patent ensures continuity of useful action by having two capacitors work in parallel alternating modes. While one capacitor is discharging (non-useful action), the other is measuring voltage (useful action). This continuous alternation eliminates idle time in the measurement process, allowing the system to maintain productive operation throughout the measurement cycle, thereby reducing total measurement time while keeping the process relatively simple.
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 prevents measurement errors caused by residual charges and significantly reduces the time required to measure battery voltage by using multiple capacitors to measure voltages in parallel, ensuring accurate and efficient voltage summation.
Implementation Method 1
n capacitors that are connected to one another to form a closed loop
Data Source
AI summary
The present invention relates to circuit for measuring battery voltage and method for battery voltage measurement using the same. In the circuit for measuring battery voltage and method for battery voltage measurement using the same, three or more capacitors, which form a closed loop and are sequentially connected, are provided, and voltages of voltage sources are measured by using the three or more capacitors in turn, which prevents measurement errors from occurring due to residual charges in the capacitors and enables more precise measurement. Further, according to the present invention, since the three or more capacitors are alternately charged and discharged, the delay in time is decreased, and the voltages of the plurality of voltage sources can be measured at one time. Therefore, it is possible to reduce the amount of time required to measure battery voltage.