Battery Equalization Circuit Test Device with Segmented Current Detection
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Solution Overview
Problem
Existing battery equalization circuit testing methods face challenges in accurately measuring both large equalization currents and small leakage currents using a single ampere meter, leading to measurement inaccuracies and high costs.
Innovation Solution
A device and method that utilize multiple voltage supply modules, equalization current detection modules, switch assemblies, and leakage current detection modules, with a control module to manage the connection states of these components, allowing for separate and accurate detection of equalization and leakage currents through the formation of test loops and controlled MOS transistor states.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single ampere meter is used to measure both equalization current and leakage current, then device complexity is reduced, but measurement precision deteriorates due to the large difference in current magnitudes
Solution Approach 1:
The patent divides the current detection function into two separate modules: an equalization current detection module for measuring large currents (typically >100mA) and a leakage current detection module for measuring small currents (typically <100mA). This segmentation allows each module to be optimized for its specific measurement range, resolving the contradiction between device simplicity and measurement precision.
2Measurement precision
If a high-precision ampere meter with wide measurement range is used, then measurement precision is improved, but device cost increases significantly
Solution Approach 1:
The patent applies local quality by using different detection modules with different precision characteristics suited to different measurement needs. The equalization current detection module uses components optimized for large current measurement, while the leakage current detection module uses components optimized for small current measurement. This approach achieves high overall measurement precision without requiring expensive wide-range high-precision instruments.
3Measurement precision
If separate detection modules are used for equalization current and leakage current, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent combines the separate detection modules into a unified battery equalization circuit testing device with integrated control. The control module coordinates the operation of both detection modules, managing test loop configuration and data processing. This merging approach maintains the measurement precision benefits of separate modules while reducing overall system complexity through integration.
Data Source
AI summary
Disclosed are a device and a method for testing a battery equalization circuit. The device includes: multiple voltage supply modules, each of which being connected to a corresponding equalization module to form multiple test loops, and being configured to supply simulated voltage of the battery cell to a corresponding equalization module; multiple equalization current detection modules, each of which being configured to detect equalization current of each test loop; multiple switch assemblies and multiple leakage current detection modules, each switch assembly being connected in parallel with a corresponding leakage current detection module, and each leakage current detection module being configured to detect leakage current generated by a corresponding equalization module when the leakage current detection module is connected into a corresponding test loop; and a control module, configured to control each switch assembly and each equalization module to detect the equalization current and the leakage current of each test loop.