Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Overcurrent detection circuit

A detection circuit and overcurrent technology, applied in the direction of measuring current/voltage, measuring device, measuring electrical variables, etc., can solve the problem of poor accuracy of overcurrent discharge threshold and achieve the effect of reducing the number of mismatching series

Active Publication Date: 2011-05-04
WUXI ZGMICRO ELECTRONICS CO LTD
View PDF4 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

More stages of mismatch lead to poorer accuracy of overcurrent discharge threshold

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Overcurrent detection circuit
  • Overcurrent detection circuit
  • Overcurrent detection circuit

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0027] Reference herein to "one embodiment" or "an embodiment" refers to a particular feature, structure or characteristic that can be included in at least one implementation of the present invention. "In one embodiment" appearing in different places in this specification does not all refer to the same embodiment, nor is it a separate or selective embodiment that is mutually exclusive with other embodiments.

[0028] see Figure 4 As shown, it shows the structure of an embodiment of the overcurrent detection circuit of the present invention. As shown in the figure, the overcurrent detection circuit of the present invention includes a first voltage input circuit, a second voltage input circuit and a comparator.

[0029] The first voltage input circuit includes a first current source I31, one end of the first current source I31 is connected to the power supply V, and the other end of the first current source I31 is connected to the source of the first transistor MP31 through a r...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides an overcurrent detection circuit which comprises a first input voltage circuit, a second input voltage circuit and a comparator, wherein the first input voltage circuit and the second input voltage circuit respectively provide a first input voltage and a second input voltage to a first input end and a second input end of the comparator; and the comparator has an input deviation, and compares the first input voltage and the second input voltage to output a comparative result signal.

Description

【Technical field】 [0001] The invention relates to the field of electronic circuits, in particular to a discharge overcurrent detection circuit in a battery protection circuit. 【Background technique】 [0002] figure 1 It is a structural diagram of a lithium battery. The lithium battery is composed of a battery protection circuit and a battery cell. The battery protection circuit includes a battery protection chip and power device MOS tubes MD and MC. The battery protection chip is inside the dotted line box. The battery protection chip includes an overcharge detection circuit, an overcurrent detection circuit, a charging overcurrent detection circuit, a discharge overcurrent detection circuit, and a control circuit. When there is no abnormal state after the lithium battery is connected to the load RL, MC and MD are in the conduction state, and the lithium battery discharges the load RL. The discharge current is shown by the arrow in the figure. When MC and MD are conducting,...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G01R19/165
Inventor 王钊
Owner WUXI ZGMICRO ELECTRONICS CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com