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Capacitance calculation device, method and system

A capacitance value and flying capacitor technology, applied in circuit devices, battery circuit devices, measuring devices, etc., can solve problems such as high voltage, shortened battery life, and reduced battery life

Active Publication Date: 2021-11-05
NUVOLTA TECH (SHANGHAI) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

Reduced capacitance value may result in larger voltage ripple
When charging a battery with a switched capacitor converter, large voltage ripple may shorten battery life
In addition, when a dual-phase switched-capacitor converter is used to charge the battery, the unbalanced capacitance values ​​of the two flying capacitors may reduce the life of the battery

Method used

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  • Capacitance calculation device, method and system
  • Capacitance calculation device, method and system
  • Capacitance calculation device, method and system

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Embodiment Construction

[0019] The implementation and application of preferred embodiments of the present disclosure will be discussed in detail below. It should be appreciated, however, that the present disclosure provides many applicable inventive concepts that can be embodied in a wide variety of specific contexts. The specific embodiments discussed are merely illustrative of some specific ways to make and apply the disclosure, and do not limit the scope of the disclosure.

[0020] This disclosure will describe some preferred embodiments in the specific context, namely capacitance calculation apparatus, methods and systems in switched capacitor power converters. However, the present disclosure is also applicable to various other power converters. Hereinafter, various embodiments of the present disclosure will be described in detail with reference to the accompanying drawings.

[0021] figure 1 A schematic diagram of a two-phase switched capacitor power converter according to an embodiment of th...

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Abstract

The invention provides a capacitance calculation device, method and system. The method comprises the following steps: providing current flowing through a first flying capacitor in the switched capacitor power converter; measuring a first voltage at a first terminal of the first flying capacitor at a first voltage measurement time; measuring a second voltage at the first terminal of the first flying capacitor at a second voltage measurement time; and calculating a capacitance value of the first flying capacitor based on the first voltage, the second voltage, the first voltage measurement time, and the second voltage measurement time.

Description

technical field [0001] The present invention relates to capacitance calculation devices, methods and systems, and in some specific embodiments, to capacitance calculation devices, methods and systems in switched capacitor power converters. Background technique [0002] With the continuous advancement of technology, various electronic devices (such as mobile phones, tablet computers, digital cameras, MP3 players and / or other similar electronic devices) have become popular. Each portable device may employ multiple rechargeable battery cells. These rechargeable battery cells can be connected in series or in parallel to form a rechargeable battery pack for storing electrical energy. [0003] A battery charger is used to restore the energy of the battery. The battery charger is controlled to supply voltage (eg, constant voltage charging mode) and current (eg, constant current charging mode) to the battery in order to recover energy from the battery. [0004] There are various ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/07G01R27/26H02J7/00
CPCH02M3/07G01R27/2605H02J7/0047H02J7/00712H02J7/0031H02J7/0029H02J2207/20H02M1/0058
Inventor 宋益圭夏晓明
Owner NUVOLTA TECH (SHANGHAI) CO LTD
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