BPS Amperes PCB

Owner	Nathan Lemma
Status	IN PROGRESS
Contributors	Nathan Lemma
Approver	Lakshay Gupta
Due date	30 Nov 2024
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❓ Problem statement

BPS is tasked with securing the safety and monitoring of the battery, such as current monitoring. Over-current of the battery can damage internal components and pose a risk to the driver.

💡 Research insights

There are 2 ways to measure current, either using a shunt resistor connected to the load or using a hall-effect sensor. They have their own pros and cons but they solve the same problem.

📊 Solution hypothesis

The solution is successful if we are able to track current reliably and transmit that data to the leaderboard.

🌈 Design options

There are only 2 ways to measure current. Either measure the voltage across a resistor in series with the load or we can measure the magnetic field of the wire.

	Option 1 - Voltage Across a Resistor	Option 2 - Magnetic Field of Wire
Overview	Current Sense Amplifier w/ Shunt Resistor	Hall-Effect Current Sensing
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Docs
Pros and cons	Preferred Temperature Stable Physically smaller Affected by electric noise (can be isolated)	Power Effective Low Drift Affected by magnetic noise Why use it when a resistor works anyways