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Week #8: Discussion results

Week #8: Discussion results. Continue battery management. Group #33 Group member: Tianhao Han Ximeng Sun(Susie) Xing Cao(Star) Zhuoran Yang. A simple bidirectional 2-wire bus Aim to lightweight communication & efficient inter-IC control

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Week #8: Discussion results

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  1. Week #8: Discussion results Continue battery management Group #33 Group member: TianhaoHan Ximeng Sun(Susie) Xing Cao(Star) Zhuoran Yang

  2. A simple bidirectional 2-wire bus • Aim to lightweight communication & efficient inter-IC control • all i2c-bus compatible devices can communicate directly with each other through(via) the i2c-bus • Each device connected to the bus is software addressable • Masters can operate as master-transmitters or as master-receivers • Up to 100 kbit/s in the standard-mode, 3.4Mbit/s in the high-speed mode(ultra 5 Mbit/s)

  3. SMBus (SMB) System Management Bus: It is a single-ended simple two-wire bus for the purpose of lightweight communication. SMBus, defined by Intel in 1995, is a subset of I²C that defines the protocols more strictly. One purpose of SMBus is to promote robustness and interoperability.

  4. SMBus has a “High Power” version 2.0 that includes a 4 mA sink current that cannot be driven by i2c. • The SMBus clock is defined from 10-100kHz while i2c can be 0-100kHz, 0-400kHz, 0-1MHz and 0-3.4MHz, depending on the mode. • SMBus defines a clock low time-out, which is 35ms. I2c doesn’t specify any timeout limit. • SMBus defines both rise and fall time of bus signals. I2c does not. • The SMBus uses i2c hardware and i2c hardware addressing, but adds second-level software for building special systems. • SMBus has a time-out feature which resets devices if a communication takes too long.

  5. HDQ • A single-wire serial data interface • Hose controllers, • configured for either polled or interrupt processing • use the interface to access various IC registers • use command-based protocol

  6. Impedance Track™ • Measured impedance of the battery’s cells as a key input to its remaining capacity predictions

  7. I2C Protocol Pull up resistor

  8. Pull up resistor • Definition Pull-up resistors are used in electronic logic circuits to ensure that inputs to logic systems settle at expected logic levels if external devices are disconnected or high-impedance. They may also be used at the interface between two different types of logic devices, possibly operating at different power supply voltages.

  9. Why I2C needs R(pull-up) • The pins on the chips are of open-collector design.

  10. Measure the current • LTC4151: High Voltage I2C Current and Voltage Monitor

  11. Measure the current Required external components: • Asense resistor (Shunt) • Two bus pull-up resistors • Aresistive divider for 5V measurement on ADIN.

  12. Measure the current • Current shunt monitor: INA209 -- TI

  13. HDQ vs I2C • Save one interface which connected to battery. Since some of the interfaces are gilded, HDQ could save costs. • I2C is more convenience on software driver. • I2c has a quicker transfer speed.

  14. Wireless Charge Battery

  15. What is Wireless charge • Wireless charge also know as inductive charge. • Uses an Electromagnetic field to transfer energy between two objects. Energy is sent through Inductivecoupling to an electrical device, which then can use that energy to charge batteries or run the device.

  16. Advantage of wireless charge 1:Lower risk of electrical shock or shorting out when wet. 2: Protected connections 3: Safer for medical implants 4:Convenience

  17. In the future • Invisible implant to table Table Surface Charging Panel

  18. This is a big market for TI !

  19. Original

  20. Improving Controller Chip Inductor Wire Connect

  21. BQ500210EVM-689 Input maximum 20V Thermo cutoff

  22. Useless of my idea

  23. Battery management on Green energy • The most acceptable kinds of green energy are solar, thermal, kinetic and fuel cell. We will illustrate all of them respectivlyas following: • Solar: We can add a battery management product before or after the green battery. After the solar energy goes through the panels, it can fulfill different functions either before or after the storage boards.

  24. Battery management on Green energy • For solar panel, there is a huge market all over the world. For example, a company named HAQ SOLAR has a product “50w solar panel”. For this product, the open circuit voltage is 26.53(v), which is pretty low so that we can add TI’s products on this panel to reduce the power consumption as well as improve the power efficiency.

  25. Battery management on Green energy Thermal: Thermal energy is a part of total internal energy of a thermodynamic system or sample of matter that results in the system temperature. There is an article mentioned “Exploiting thermal energy as a source of power for biomedical applications has become the subject of a great deal of research in recent years”

  26. Battery management on Green energy • “In the future, a casual mention of ‘the patch’ might not be a reference to the nicotine patch many smokers use now to try to kick their habit. Through their research on self-powered systems, a team of researchers is exploring thermal energy harvesting to advance the development of body-worn sensor patches that monitor physiological conditions. Body-worn devices can record glucose levels or provide ECG monitoring, for example. They also exhibit a great deal of promise for future detection and monitoring applications.”

  27. Battery management on Green energy • “But the lifespan of these devices, like many products, is often limited by battery life.” • “While thermal energy harvesting demonstrates potential for powering wearable sensors, harnessing vibration energy, on the other hand, could someday power implantable devices”. The market will be very promising with the growing of technology.

  28. Battery management on Green energy • Kinetic: For Kinetic energy, we have an idea: we can put TI’s products in Led Self-generating Flashlights. It can extend the battery life span by lower the power consumption, and protect the battery itself in the flashlights. We can even add Led screens on the flashlights to actually show how much battery left.

  29. Battery management on Green energy • Fuel Cell: A fuel cell is a device that converts the chemical energy from a fuel into electricity through a chemical reaction with oxygen or another oxidizing agent. Hydrogen is the most common fuel cells. Fuel cells are different from batteries in that they require a constant source of fuel and oxygen to run, but they can produce electricity continually for as long as these inputs are supplied.

  30. Battery management on Green energy • A good example for application is the Fuel cell electric vehicles (FCEVs). Over 20 FCEVs prototypes and demonstration cars have been released since 2009. Demonstration models include the Honda FCX Clarity, Toyota FCHV-adv, and Mercedes-Benz F-Cell. • In 2010, fuel cell industry revenues exceeded a $750 million market value worldwide.

  31. Green Energy • Solar light / lantern

  32. Green Energy • Solar charger.

  33. Green Energy • Hybrid Electric Vehicle

  34. Question time.

  35. Thank you for your listening!

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