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Boost circuit for electrochromic devices

A technology of electrochromic and booster circuits, applied in battery circuit devices, constant current power supply DC circuits, circuit devices, etc., can solve problems such as aggravation

Inactive Publication Date: 2019-11-08
KINESTRAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Inhomogeneities in the transmission of electrochromic devices (e.g., iris effects) during switching can exacerbate
The cables and power supplies needed to deliver the large amounts of power also need to be large, which adds additional cost to the system

Method used

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  • Boost circuit for electrochromic devices
  • Boost circuit for electrochromic devices
  • Boost circuit for electrochromic devices

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0233] Electrochromic device with boost circuit power supply

[0234] Figure 19 The charge delivered to two different electrochromic devices over time is shown. The y-axis is the charge delivered to the electrochromic device in coulombs and the x-axis is time. In this example, the electrochromic device is an electrochromic window, which is roughly rectangular and measures 0.8 x 1.4m. This particular device requires about 250C of charge to switch from the first light-transmissive state to the second light-transmissive state.

[0235] Dashed curve 1904 shows charge transferred to the electrochromic device over time from an external power source configured to provide a finite amount of power. It takes approximately 8.5 minutes for the window to switch from the initial light-transmissive state to the final light-transmissive state.

[0236] The solid line curve 1902 shows the charge delivered to the electrochromic device over time from the same external power supply as descri...

example 2

[0241] System diagram of distributed boost circuit power supply system and electrochromic window

[0242] Figure 22 Multiple electrochromic windows and a distributed boost circuit power system are shown. In this embodiment, each electrochromic window 2008 has an electrochromic driver 2004 and each electrochromic driver 2004 has a battery 2006 . A system power supply 2002 is connected to each electrochromic driver 2004 . As noted above, battery 2006 provides boosted power for electrochromic driver 2004 and associated electrochromic window 2008 . Power delivery from power supply 2002 to each electrochromic driver 2004 is limited as described above. In various embodiments, multiple electrochromic drivers 2004 may be combined together into a driver cabinet to power multiple electrochromic windows 2008 , where the electrochromic windows 2008 are separate from the electrochromic drivers 2004 and battery 2006 . A system can have one or more of these drive enclosures. The power ...

example 3

[0245] System block diagram of a single boost circuit power system for multiple electrochromic windows

[0246] Figure 23 Multiple electrochromic windows and a single boost circuit power system are shown. In this embodiment, each electrochromic window 3008 has an electrochromic driver 3004 . A system power supply 3002 is connected to a boost circuit 3003 with a battery 3006 . A single boost circuit is connected to multiple electrochromic drivers 3004 . As noted above, battery 3006 provides boosted power for electrochromic driver 3004 and associated electrochromic window 3008 . The power delivered to each electrochromic driver 3004 from the power supply 3002 through the single boost circuit 3003 is limited as described above. In various embodiments, multiple electrochromic devices 3004 may be grouped together as a driver cabinet to power multiple electrochromic windows 3008 , where the electrochromic windows 3008 are separate from the electrochromic drivers 3004 . A syste...

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Abstract

An electrochromic device, with an external power supply configured to supply a limited amount of power to the electrochromic device and a boost circuit power supply that is local to the electrochromicdevice and configured to supply power to the electrochromic device that is larger than the limited amount of power supplied by the external power supply is provided.

Description

Background technique [0001] The electrochromic glass unit uses electrochromic glass that can change the transmittance by applying current and voltage. The change in transmittance usually depends on the reversible oxidation of the material. Electrochromic glass units can darken when a button is pressed or other triggered event, and electrochromic glass is also commonly used in car mirrors to reduce reflected glare. A controller or driver for an electrochromic device typically applies a voltage and current of one polarity to charge the device and reduce optical transmittance, and a voltage and current of the opposite polarity to discharge the device and increase optical transmittance. [0002] Transmittance changes in current systems are relatively slow and non-uniform. Gradual, uneven coloration or switching is a common problem associated with large area electrochromic devices. This problem, often referred to as the "iris effect," is often the result of a voltage drop across...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/19
CPCH02J7/0068E06B3/6722G02F1/163H02J2207/20G09G3/19G09G2330/028H02J1/04H02J1/084G05F1/563E06B2009/2464G02F1/1525H02M3/04
Inventor S·考菲W·巴纳姆D·F·布雷纳德
Owner KINESTRAL TECH