Low-Power System Design at TU München

Flashcards and summaries for Low-Power System Design at the TU München

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Study with flashcards and summaries for the course Low-Power System Design at the TU München

Exemplary flashcards for Low-Power System Design at the TU München on StudySmarter:

What is the privacy / cost tradeoff in smart energy system?

Exemplary flashcards for Low-Power System Design at the TU München on StudySmarter:

What are possible variations in SOH based charging schemes?

Exemplary flashcards for Low-Power System Design at the TU München on StudySmarter:

How does the Bluetooth Low Energy mode work?

Exemplary flashcards for Low-Power System Design at the TU München on StudySmarter:

What are the charge transfer patterns in active cell balancing architectures?

Exemplary flashcards for Low-Power System Design at the TU München on StudySmarter:

What is the strategy used in SOH aware cell balancing?

Exemplary flashcards for Low-Power System Design at the TU München on StudySmarter:

What is the strategy chosen in Battery Aware Smartphone Charging?

Exemplary flashcards for Low-Power System Design at the TU München on StudySmarter:

What is the approach chosen in battery aware smartphone charging?

Exemplary flashcards for Low-Power System Design at the TU München on StudySmarter:

Name an example for cell, pack, device and multi device level Battery Health Management

Exemplary flashcards for Low-Power System Design at the TU München on StudySmarter:

What system can predict the energy behaviour of video games?

Exemplary flashcards for Low-Power System Design at the TU München on StudySmarter:

What is the hybrid DVS scheme for interactive games?

Exemplary flashcards for Low-Power System Design at the TU München on StudySmarter:

What are the results of the Power gap?

Exemplary flashcards for Low-Power System Design at the TU München on StudySmarter:

What is the motivation behind intelligent smartphone charging?

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Exemplary flashcards for Low-Power System Design at the TU München on StudySmarter:

Low-Power System Design

What is the privacy / cost tradeoff in smart energy system?
– To hide information about the energy producre a storage is needed that can flatten the energy output.

Low-Power System Design

What are possible variations in SOH based charging schemes?
Balancing current (ideal at 7A)
Aging speed (Delta SOH / cycle)
Cell positioning (optimized depending on SOH and aging speed)

Low-Power System Design

How does the Bluetooth Low Energy mode work?
Devices only wake up at a previously shared “anchor point” at which communication is done. Otherwise they stay in sleep mode.

Low-Power System Design

What are the charge transfer patterns in active cell balancing architectures?
– Non neighbor, concurrent, cell – to – module, module – to – cell, module – to – module

Low-Power System Design

What is the strategy used in SOH aware cell balancing?
– Use architecture to actively reduces stress on less healthy cells
–> Healthy cell provides charge to less healthy cell
–> Decrease SOC swing on less healthy cells
–> Increase cycle life

Low-Power System Design

What is the strategy chosen in Battery Aware Smartphone Charging?
– Try to keep average SOC as low as possible with alarm induced charging
–> Delay the charging ether manually or with a predictor
–> Decrease the target SOC
–> Charge to medium SOC first

Low-Power System Design

What is the approach chosen in battery aware smartphone charging?
Exploit user data on smartphones to achieve better battery health management

Low-Power System Design

Name an example for cell, pack, device and multi device level Battery Health Management
Cell- Temperature / Voltage / Current
Pack- Active Cell Balancing, SOH reconfigurable, hybrid storages (supercap), pack temperature
Device- Smart Chargeres, El Vehicle charge optimization
Multi-Device- Battery storage + PV, Fleet of vehicles (lower average SOC of all batteries)

Low-Power System Design

What system can predict the energy behaviour of video games?
PID controller

Low-Power System Design

What is the hybrid DVS scheme for interactive games?
Switches between controller-based and frame structure based techniques

Low-Power System Design

What are the results of the Power gap?
– Smaller cheaper chargers that have to work at higher currents –> increased battery aging
Solution: Supercapacitor provides buffer energy at low cost

Low-Power System Design

What is the motivation behind intelligent smartphone charging?
Today’s charging leads to low user experience, increased weight and a negative environmental impact

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