Lithium ion battery isolated in partition by using positive temperature coefficient (PTC) materials

A lithium-ion battery, material layer technology, applied in the direction of secondary batteries, battery pack parts, secondary battery repair/maintenance, etc., to prevent chain reactions and achieve the effect of obvious safety protection

Inactive Publication Date: 2011-10-12
EC POWER LLC
View PDF2 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims at the safe application of large-capacity single lithium-ion power batteries, optimizes the existing power battery mode, and provides a lithium-ion battery. The battery capacity units are partitioned inside the battery, and PTC (Positive Temperature Coefficient Thermistor material) material isolation can effectively solve the large-scale destructive chain reaction caused by the failure of large-capacity lithium-ion batteries, and control the speed and scale of the destructive reaction when the battery fails internally

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
  • Lithium ion battery isolated in partition by using positive temperature coefficient (PTC) materials
  • Lithium ion battery isolated in partition by using positive temperature coefficient (PTC) materials
  • Lithium ion battery isolated in partition by using positive temperature coefficient (PTC) materials

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0020] The electric core of a kind of lithium-ion battery of the present invention can be square winding structure, and the structure that multiple winding cores are connected in parallel is adopted inside the battery, and the number of winding cores in this embodiment is ten, and the capacity of a single winding core is 1Ah, ten winding cores The positive and negative plates are drawn out through tabs respectively, and the capacity of the overall battery is 10Ah.

[0021] see figure 1 In the prior art, the positive and negative lead-out lugs 1 of the ten winding cores are connected by welding, and then connected to the external current-collecting structure components.

[0022] see figure 2 , 3 , in the present invention, the capacity of 10Ah is equally divided into five capacity units of 2Ah, and every two winding cores are a separate capacity unit, wherein

[0023] The lugs of the winding core 3 and the winding core 4 are collected and connected to each other to form the...

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 discloses a lithium ion battery isolated in partition by using positive temperature coefficient (PTC) materials. The internal part of the lithium ion battery is divided into at least two capacity units; lugs which are arranged in different capacity units and have the same polarity extend and gather together to form an anode lug or a cathode lug of the lithium ion battery; and in theanode lug and/or the cathode lug, the lugs from different capacity units are mutually isolated by PTC material layers. The internal part of the lithium ion battery is divided into several small capacity unit areas by the PTC materials; when the battery is abused or destroyed to cause effect losing of the internal part, the local current is over high caused by short circuit in the internal part, and meanwhile, the temperature rises quickly; when the temperature reaches the working temperature of the PTC material, the resistance increases instantly to break the transmission path of the current so that the ineffective area is isolated, the speed of effect losing reaction is controlled, and more serious chain reactions can be avoided.

Description

technical field [0001] The invention relates to the field of batteries, in particular to a lithium-ion battery using PTC materials to isolate the interior by partitions. Background technique [0002] Compared with other types of batteries such as lead-acid and nickel-cadmium, lithium-ion batteries have the advantages of large specific capacity, high operating voltage, fast charging speed, wide operating temperature range, long cycle life, small size, and light weight. At present, it has been widely used in mobile phones, notebook computers, electric tools and other fields, and its application range is becoming wider and wider. [0003] With the expansion of the scope of use of lithium-ion batteries, we are used to calling the chemical power sources used in power supply systems power batteries. The safety performance puts forward higher requirements. At present, lead-acid batteries and nickel-cadmium batteries are mostly used as power batteries in the traditional sense. 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 Applications(China)
IPC IPC(8): H01M10/0525H01M2/24H01M2/26H01M10/42H01M2/34H01M50/529
CPCY02E60/10
Inventor 王朝阳邱扬朱静王雅丹
Owner EC POWER LLC
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap