Stacked power supply monitor with sense-replica loop

A technology for monitoring and sensing current, applied in circuit monitoring/indicating, measuring electricity, measuring electrical variables, etc., can solve problems such as difficulty in measuring voltage

Active Publication Date: 2013-02-06
NAT SEMICON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, cells close to the stack - "top" can be at quite high voltages (e.g. around 45V-55V), making it difficult to measure the voltage across these cells

Method used

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  • Stacked power supply monitor with sense-replica loop
  • Stacked power supply monitor with sense-replica loop
  • Stacked power supply monitor with sense-replica loop

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Embodiment Construction

[0010] the following Figure 1 to Figure 7 The various embodiments discussed in describing the principles of the invention in this patent document are by way of illustration only and should not be construed as limiting the scope of the invention in any way. Those skilled in the art will understand that the principles of the invention may be implemented in any type of suitably arranged device or system.

[0011] figure 1 An example stacked power monitor 100 with a sense replica loop is shown according to the present disclosure. Such as figure 1 As shown in , the power supply monitor 100 includes or is used in conjunction with a set of power supplies 102a-102n. The power sources 102a-102n represent any suitable power source, such as batteries (like lithium batteries or other types of batteries), supercapacitors, fuel cells, or other voltage sources. Many power sources can be coupled together in series to form a battery stack, such as a 12-lithium battery pack in an electric ...

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PUM

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Abstract

An apparatus (100, 300, 500, 600) includes a sense module (104, 304, 504, 604) configured to be coupled to at least one power supply (102a-102n, 502a-502n), where the sense module has a first leg. The apparatus also includes a replica module (106, 306, 506, 606) having a second leg, where the first and second legs have a common structure. The apparatus further includes a feedback loop configured to cause an output voltage (VOUT) across terminals of the replica module to at least substantially equal an input voltage Delta(VIN) across terminals of the sense module based on sense currents in the first and second legs. At least one cascode stage (132a-132d, 532, 632) coupled to the sense module can be configured to reduce a voltage at which one or more signals from the sense module are referenced.; One or more trim units (160-162, 560-562) can be used to reduce a gain error and / or an offset error between the input voltage and the output voltage.

Description

technical field [0001] The present disclosure relates generally to power supply monitors, and more particularly, to stacked power supply monitors with sense replica loops. Background technique [0002] Many types of equipment and systems use power supplies that are stacked in series or coupled together. For example, electric vehicles typically include a plurality of lithium or other batteries arranged in stacks. Each cell is typically designed to provide a specific voltage (eg, about 5V) up to a maximum voltage (eg, about 5.5V). In a 12 battery pack or stack, the battery pack may be designed to provide a voltage of approximately 60V. It is necessary or desirable to be able to measure the voltage across each individual cell in the battery pack. This would be useful, for example, to control the charging or discharging of individual cells in a battery pack. However, cells close to the stack - the "top" - can be at quite high voltages (eg around 45V-55V), making it difficult...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/36G01R19/165H01M50/569
CPCH01M10/0525H03K5/2445Y02T10/7055H01M10/482H02J7/0021G01R31/3624G01R19/16542G01R31/3658Y02E60/12Y02T10/7011G01R31/396G01R31/3842Y02T10/70Y02E60/10H02J7/0013H02J7/0047H01M50/569
Inventor A·崁克里尼W·J·金特
Owner NAT SEMICON CORP
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