Converter for Current to Power Limit Translation in Vehicle Battery Systems
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
There is a lack of solutions for using a current restricting battery pack in conjunction with a power restricting control device, as no studies have been conducted on integrating these systems, making it difficult to adopt current restricting battery packs in vehicles equipped with power restricting control devices.
Innovation Solution
A vehicle system that includes a battery pack with a secondary battery, a battery sensor, and a first control device to obtain current upper limit values, along with a second control device and a converter to convert these values into power upper limit values, allowing for power-based input and output restrictions on the secondary battery, even when using a current restricting battery pack.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a current restricting battery pack is used with a power restricting control device, then the adaptability of battery packs is improved, but the device complexity increases due to the need for conversion between current and power values
Solution Approach 1:
The patent introduces a converter as an intermediary component that transforms current upper limit values from the battery pack into power upper limit values understandable by the power restricting control device. This mediator enables communication and coordination between the current restricting battery pack and power restricting control device without requiring complex direct integration, thus improving adaptability while managing device complexity.
2Measurement precision
If power restricting control is implemented using current upper limit values, then the measurement precision is improved, but the ease of operation deteriorates due to the need for value conversion
Solution Approach 1:
The converter automatically performs the transformation from current upper limit values to power upper limit values without requiring manual intervention. The system self-services by handling the unit conversion internally, maintaining measurement precision from the battery sensors while shielding operators from the complexity of unit conversions, thus improving ease of operation.
3Productivity
If current upper limit values are converted to power upper limit values in real-time, then the productivity of power control is improved, but the loss of time increases due to calculation operations
Solution Approach 1:
The converter is designed to perform power value calculations in advance or in parallel with control operations, rather than sequentially after measurements are taken. By preparing power upper limit values proactively based on current upper limit values from the battery pack, the system reduces the time loss associated with real-time conversions during critical power control moments, thus improving productivity while minimizing time loss.
Data Source
AI summary
A vehicle includes a battery pack including a secondary battery and a first control device, a second control device provided separately from the battery pack, and a converter. The converter is configured to select a conversion formula from options depending on a situation and use the selected conversion formula to convert at least one of a first current upper limit value and a second current upper limit value into at least one of a first power upper limit value and a second power upper limit value.