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Goals
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- Provide a stable, reliable 12V supply to all of the LV systems
Background and strategic fit
The lithium-ion battery in the car is charged at a maximum voltage of 160 150 V. However, the circuit boards, lights, and horn operate with an input voltage of 12 V. Therefore, the voltage needs to be stepped down to allow for proper operation.all of the LV system is designed to operate off of 12V. Two DC-DC converters will be used in parallel to reduce the load under normal conditions, and if a failure occurs, each DC-DC should be able to handle the entire LV system's load continuously.
Requirements
| # | Title | User Story | Importance | Notes | |
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| 1 | Step down voltage from 151V 151 V to 12 V | Find an appropriate part |
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| 2 | Supply the required current for the electrical components on the board | Find required part or use multiple converters to supply the proper current |
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| 3 | Provide redundancy for the circuit boards | Put parts into a configuration that allows for redundancy in case of failure |
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| 4 | Add protection to converter input | Assure that the DCDC converter board is adequately protected from overvoltage, overcurrent, and reverse voltage |
User interaction and design
Key Components:
DCDC for Boards: VICOR V110C12E100BG3 http://www.vicorpower.com/products?productType=cfg&productKey=V110C12E100BG3
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| 5 | Temperature Sensing | We need a way to wire thermistors up to the DC-DC. The reference voltage and output signal is sent to Power Distribution where it will be sampled by the MCU's ADC |
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