Current collector as well as pole piece and battery and application thereof

A technology for current collectors and batteries, applied in the field of current collectors, can solve the problems that the battery cannot continue to work, cannot effectively prevent the short circuit of the lithium ion battery, and cannot ensure that the battery continues to work.

Active Publication Date: 2019-06-11
CONTEMPORARY AMPEREX TECH CO
View PDF5 Cites 14 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, these methods in the prior art cannot effectively prevent the occurrence of a short circuit in the lithium-ion battery, and there is no guarantee that the battery can continue to work after the abnormal situation occurs.
In the above improved methods, after the internal short circuit occurs in the battery, the temperature of

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
  • Current collector as well as pole piece and battery and application thereof
  • Current collector as well as pole piece and battery and application thereof
  • Current collector as well as pole piece and battery and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0138] Example

[0139] 1. Preparation of current collector:

[0140] Select an insulating layer of a certain thickness, form a conductive layer of a certain thickness on its surface by vacuum evaporation, mechanical rolling or bonding, and measure the normal temperature sheet resistance of the conductive layer.

[0141] in,

[0142] (1) The formation conditions of the vacuum evaporation method are as follows: place the insulating layer after surface cleaning treatment in the vacuum plating chamber, melt and evaporate the high-purity metal wire in the metal evaporation chamber at a high temperature of 1600 ℃ to 2000 ℃, and the evaporated metal After passing through the cooling system in the vacuum plating chamber, it is finally deposited on the surface of the insulating layer to form a conductive layer.

[0143] (2) The forming conditions of the mechanical rolling method are as follows: the foil of the conductive layer material is placed in a mechanical roller, rolled to a p...

Example Embodiment

[0177] Experimental example:

[0178] 1. Battery test method:

[0179] The cycle life test of lithium-ion battery is carried out, and the specific test method is as follows:

[0180] The lithium-ion battery was charged and discharged at two temperatures of 25°C and 45°C, that is, first charged to 4.2V at a current of 1C, and then discharged to 2.8V at a current of 1C, and recorded the discharge capacity of the first week; The battery was then subjected to 1C / 1C charge-discharge cycles for 1000 cycles, the battery discharge capacity at the 1000th cycle was recorded, and the 1000th cycle discharge capacity was divided by the first cycle discharge capacity to obtain the 1000th cycle capacity retention rate.

[0181] The experimental results are shown in Table 4.

[0182] 2. Test of battery internal resistance

[0183] Use an internal resistance meter (model HIOKI-BT3562) to test, and the test environment is: normal temperature 23±2℃. Before the test, short-circuit the positiv...

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

PropertyMeasurementUnit
Resistanceaaaaaaaaaa
Membrane resistanceaaaaaaaaaa
Thicknessaaaaaaaaaa
Login to view more

Abstract

The invention relates to the field of batteries, in particular to a current collector as well as a pole piece and a battery and an application thereof. The current collector comprises an insulation layer with a supporting function and a conductive layer with a conductive and current collection function, wherein a normal-temperature thin-film resistance RS of the conductive layer satisfies: RS is greater than or equal to 0.01 omega and less than or equal to 0.15 omega. By adopting the current collector, the short-circuit resistance when in short circuit under the abnormal condition of a batterycan be greatly increased, so that the short-circuit current is greatly reduced, the short-circuit heat can be greatly reduced, and the safety performance of the battery can be greatly improved; and in addition, due to the small heat yield, the heat produced at a point having the internal short circuit can be completely absorbed by the battery, the temperature increase of the battery is small, sothat the influence of the short-circuit damage for the battery can be limited in a range of the point, and only the point short circuit is formed without influencing the normal work of the battery ina short time.

Description

technical field [0001] The present application relates to the field of batteries, in particular, to a current collector, its pole pieces, batteries and applications. Background technique [0002] Lithium-ion batteries are widely used in electric vehicles and consumer electronics products due to their advantages such as high energy density, high output power, long cycle life and low environmental pollution. However, when lithium-ion batteries are subjected to abnormal conditions such as extrusion, collision or puncture, it is easy to catch fire and explode, causing serious harm. Therefore, the safety problem of lithium-ion batteries limits the application and popularization of lithium-ion batteries to a great extent. [0003] A large number of experimental results show that the short circuit in the battery is the root cause of the safety hazard of lithium-ion batteries. In order to avoid the short circuit in the battery, researchers have tried to improve the structure of th...

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
IPC IPC(8): H01M4/66H01M4/13H01M10/0525
CPCH01M4/64H01M4/662H01M4/664H01M4/667H01M10/052H01M10/4235H01M4/661H01M4/663H01M10/0525Y02E60/10Y02P70/50H01M10/486H01M50/581
Inventor 梁成都黄华锋黄起森
Owner CONTEMPORARY AMPEREX TECH CO
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