Systems and methods for delivering power in response to a connection event
US-9214807-B2 · Dec 15, 2015 · US
Scalable method of proportional active state of charge balancing for managing variations in the state of health of batteries
US9136705B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9136705-B2 |
| Application number | US-201113163138-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jun 17, 2011 |
| Priority date | Jun 17, 2011 |
| Publication date | Sep 15, 2015 |
| Grant date | Sep 15, 2015 |
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Abstract
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A method and system for power management among batteries of varying states of health. Two or more battery packs are switched on and off in square wave pulses to energize a multi-winding transformer, and the output of the transformer is used to power a load. As the state of charge of the battery packs decrease at different rates, the duty cycle of each battery pack's switch pulse is made proportional to its state of charge relative to the other battery packs. The battery pack with the greatest state of charge has the longest on-time and provides the most energy to the transformer, yet all battery packs contribute. A baseline duty cycle is computed by a proportional integral control module, based on voltage measurements at the load. Energy contribution is managed so that state of charge does not diverge even when the battery packs have widely varying states of health.
First claim
Opening claim text (preview).
What is claimed is: 1. A power management system for delivering electrical power from two or more battery packs to a load, said power management system comprising: sensors for measuring a state of charge in each of the two or more battery packs; a switch positioned in a positive lead of each of the two or more battery packs, where each of the switches provides a switched power signal from one of the battery packs; a diode in series with each of the switches in the positive lea…
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Electricity · mapped topic
Electricity · mapped topic
Electricity · mapped topic
Electricity · mapped topic
- H02J1/108Primary
Electricity · mapped topic
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- What does patent US9136705B2 cover?
- A method and system for power management among batteries of varying states of health. Two or more battery packs are switched on and off in square wave pulses to energize a multi-winding transformer, and the output of the transformer is used to power a load. As the state of charge of the battery packs decrease at different rates, the duty cycle of each battery pack's switch pulse is made proport…
- Who is the assignee on this patent?
- Namou Andrew J, Schlaupitz Christopher A, Mackintosh Todd F, and 2 more
- What technology area does this patent fall under?
- Primary CPC classification H02J1/108. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Sep 15 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).