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

Protective circuit and unit for secondary battery

A technology for protecting circuits and secondary batteries, which can be used in secondary batteries, secondary battery repair/maintenance, secondary battery charging/discharging, etc., and can solve problems such as hindering small secondary batteries and obstructing

Inactive Publication Date: 2006-12-20
PANASONIC CORP
View PDF2 Cites 30 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] In addition, thermal fuses and heating devices are components that cannot be integrated into integrated circuits, and space for their installation is necessary, which prevents the use of small secondary batteries to form small and compact battery packs, or prevents the formation of protective circuits. Secondary battery with protection circuit integrated with secondary battery

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
  • Protective circuit and unit for secondary battery
  • Protective circuit and unit for secondary battery
  • Protective circuit and unit for secondary battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0050] Embodiments of the present invention will be described below with reference to the drawings for understanding of the present invention. In addition, the embodiment shown below is an example of actualization of this invention, and does not limit the technical scope of this invention.

[0051] figure 1 Shown is a configuration diagram of a battery protection circuit according to the first embodiment of the present invention, which has a main protection circuit A for protecting the secondary battery 3 constituted as a lithium ion secondary battery from overcharging, overdischarging and excessive current, and Together with the main protection circuit A, a sub-protection circuit B that double protects the secondary battery 3 from overcharging.

[0052] exist figure 1In this case, between the negative side of the secondary battery 3 and the negative input / output terminal 5, the first FET (first switching device) 11 and the second FET 12 constituting the main protection ci...

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

A protective circuit for protecting a rechargeable battery from battery breakdown caused by prolonged overcharging, and a protective element incorporated in this circuit are provided. A main protective circuit (A) is equipped with main control means (1) for shutting off a first FET (11) or a second FET (12) when any of overcharging, overdischarging, or excessive discharge current is detected. A sub-protective circuit (B) is equipped with sub-control means (2) for shutting off a third FET (13) when the anti-overcharging function of the main control means (1) is not operating properly.

Description

[0001] This application is a divisional application of a patent application with an application date of May 17, 2000, an application number of 00800878.7, and an invention title of "protection circuit and protection element for a secondary battery". technical field [0002] The present invention relates to a battery protection circuit and a protection element for protecting a secondary battery such as a lithium ion secondary battery from being overcharged. Background technique [0003] Overcharging the secondary battery beyond the appropriate conditions will cause gas generation and heat generation as the electrolyte solution decomposes, leading to deterioration of battery performance and damage. In particular, if the voltage exceeds a certain range when the lithium-based secondary battery is charged, the battery will be deteriorated and damaged considerably. Therefore, a battery protection device is provided to protect the secondary battery from being misused. [0004] The ...

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 Patents(China)
IPC IPC(8): H01M10/42H01M2/34H01M6/50H01M10/44H01M10/48H02J7/00
CPCH01M2/348H01M10/44H02J7/0031H01M2200/106H01M10/42H01M10/48H01M10/486Y02E60/10H01M50/581H02J7/00302H02J7/00306H02J7/00304
Inventor 祝园芳宣
Owner PANASONIC CORP
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