Battery Self-Discharge Detection Using Instantaneous Current
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Solution Overview
Problem
Existing battery detection methods, such as the constant voltage charging method, are inefficient and costly due to the long time required to stabilize the charging current, leading to high device occupation and energy consumption, and poor applicability for batch detection.
Innovation Solution
A battery detection method and apparatus that measures the open-circuit voltage and instantaneous current after a preset time, allowing for immediate measurement and removal of the battery, enabling simultaneous detection of multiple batteries and reducing detection time and cost.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the constant voltage charging method is used to detect battery self-discharge performance, then the detection accuracy is improved, but the detection time is extended and device occupation increases
Solution Approach 1:
The battery undergoes a standing period (preset time) before detection, during which it stabilizes its voltage state. This preliminary action ensures that the open-circuit voltage measurement is accurate without requiring prolonged detection time, thus resolving the contradiction between detection accuracy and time consumption
Solution Approach 2:
The method skips the traditional prolonged constant voltage charging stabilization phase by directly measuring open-circuit voltage after a brief standing period, then quickly applying test voltage and measuring instantaneous current. This rushing through the detection process maintains accuracy while significantly reducing detection time and device occupation
2Reliability
If the constant voltage charging method is used for battery detection, then reliable self-discharge assessment is achieved, but device cost and energy consumption increase
Solution Approach 1:
The detection method uses periodic pulsing of test voltage rather than continuous constant voltage charging. The constant voltage source applies voltage briefly to measure instantaneous current, then stops. This periodic action maintains reliable self-discharge assessment while dramatically reducing energy consumption and device occupation time
Solution Approach 2:
The method uses brief, transient voltage pulses instead of prolonged charging periods. Each detection uses a short-lived voltage application that suffices for measurement purposes, reducing overall energy consumption and device wear while maintaining assessment reliability
3Measurement precision
If the traditional constant voltage method is used, then accurate single battery detection is achieved, but batch detection efficiency is reduced
Solution Approach 1:
The detection apparatus continuously operates by implementing a rapid cycle: measure open-circuit voltage, apply test voltage briefly, measure instantaneous current, then immediately proceed to the next battery. This continuous operation without prolonged idle periods enables efficient batch detection while maintaining single battery accuracy
Solution Approach 2:
Multiple batteries are prepared in advance with their open-circuit voltages measured during standing periods before detection. This preliminary preparation allows the apparatus to quickly process batches without interruption, improving productivity while maintaining measurement precision through the established voltage-stabilization protocol
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 significantly improves detection efficiency and cost-effectiveness while maintaining accurate self-discharge performance assessment, allowing for the detection of batches of batteries with better applicability.
Implementation Method 1
a battery to be tested, and measure an open-circuit voltage of the battery to be tested
Data Source
AI summary
A battery detection method and apparatus are provided. The battery detection apparatus includes: a voltage measurement module, configured to connect to a battery to be tested, and measure an open-circuit voltage of the battery to be tested; a processor, configured to obtain the open-circuit voltage; a constant voltage source, configured to input a test voltage to the battery to be tested under control of the processor after the battery to be tested stands for a preset time, the test voltage is the same as the open-circuit voltage; and a current measurement module, configured to measure an instantaneous current of the battery to be tested after the test voltage is inputted. The processor is also configured to obtain the instantaneous current and determine the self-discharge characteristic of the battery to be tested according to the instantaneous current and a preset current threshold.