Battery Emulator Calibration Switching for Multi-Cell Accuracy
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Solution Overview
Problem
Existing battery emulators for high-voltage batteries with multiple cells in series require multiple calibration standards, which is cumbersome and space-consuming, and lack efficient automation for testing battery management systems.
Innovation Solution
A battery emulator apparatus with a switching apparatus that allows a single calibration standard to be connected to different taps of emulated cells, integrating the switching apparatus and calibration standard within the emulator, using electromechanical switching elements and low-voltage bus rails to simplify calibration and reduce complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple calibration standards are used for each cell, then calibration accuracy is improved, but device complexity and installation space increase
Solution Approach 1:
A single calibration standard is designed to calibrate multiple cells sequentially through a switching apparatus. The calibration standard serves multiple functions by being switchably connected to different cells, eliminating the need for dedicated calibration standards for each cell while maintaining calibration accuracy.
Solution Approach 2:
The calibration standard and switching apparatus are integrated into a unified calibration system. The switching apparatus combines multiple cell connections with a single calibration standard interface, merging what would traditionally be separate calibration paths into one integrated system.
2Measurement precision
If multiple calibration standards are used for each cell, then calibration accuracy is improved, but installation space is increased
Solution Approach 1:
The calibration standard is designed as a universal device that can calibrate any cell in the series through the switching apparatus, replacing multiple space-consuming calibration standards with a single multi-functional unit.
Solution Approach 2:
The switching apparatus is integrated within the battery emulator housing, with the calibration standard and switching components nested within the existing structure. This nested integration minimizes additional installation space while enabling the single-standard calibration approach.
3Ease of operation
If manual calibration procedures are used, then ease of operation is maintained, but productivity and automation capability are reduced
Solution Approach 1:
The switching apparatus enables dynamic calibration sequences where the calibration standard can be automatically switched between different cells according to a programmed sequence. This dynamic switching capability allows automated calibration while maintaining operational simplicity through centralized control.
Solution Approach 2:
The calibration system incorporates feedback mechanisms that monitor calibration results and can automatically adjust or repeat calibration steps as needed. This feedback loop enables automated calibration procedures while maintaining ease of operation through programmable control sequences.
4Manufacturing precision
If high-precision electrical components are used for simulated cells, then manufacturing accuracy is improved, but device complexity and cost increase
Solution Approach 1:
Calibration is performed as a preliminary adjustment step before normal operation. By calibrating the simulated cells in advance using the single calibration standard and switching apparatus, the system compensates for component tolerances without requiring high-precision components from the start, thereby reducing overall system complexity and cost.
Data Source
AI summary
An apparatus or method for calibrating a battery emulator is proposed. The battery emulator emulates a plurality of cells connected in series, wherein each emulated cell has taps over which at least one emulated quantity is tapped, wherein the apparatus comprises a switching apparatus via which a calibration standard is switchably connectable with different taps.