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

Collector for bipolar lithium ion secondary battery

A secondary battery and current collector technology, applied in secondary batteries, secondary battery manufacturing, large flat batteries/batteries, etc., can solve the problem of reduced output power, unfavorable battery space, reduced battery output power density, and energy density, etc. problems, to achieve the effect of preventing penetration and absorption

Active Publication Date: 2012-06-20
NISSAN MOTOR CO LTD
View PDF3 Cites 23 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, when the battery is connected through the connection part, the resistance of the connection part will reduce the output power
In addition, a battery with a connection is also disadvantageous in terms of space
That is, the connection part may cause a reduction in the output power density and energy density of the 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
  • Collector for bipolar lithium ion secondary battery
  • Collector for bipolar lithium ion secondary battery
  • Collector for bipolar lithium ion secondary battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0105]

[0106] As a 1st electroconductive layer, the electroconductive resin film (film thickness: 25 micrometers) which mixed 10 mass % of ketjen blacks to 100 mass % of polyimide (PI) was prepared.

[0107] On the other hand, 10% by mass of Ketjen Black was mixed with 100% by mass of ethylene-vinyl alcohol copolymer (ethylene composition: 38 mol%) (EVOH) just melted, and a conductive resin film (film thickness: 25 μm), as the second conductive layer.

[0108] The first conductive layer and the second conductive layer prepared and fabricated as described above were stacked and heat-sealed at 160° C. for 10 minutes to fabricate a current collector for a bipolar lithium ion secondary battery having a two-layer structure.

[0109]

[0110] LiMn mixed as positive electrode active material 2 o 4 85% by mass, 5% by mass of acetylene black as a conductive additive, 10% by mass of polyvinylidene fluoride (PVDF) as a binder, and an appropriate amount of N-methyl-2-pyrrolidone ...

Embodiment 2

[0121] A bipolar secondary battery was produced in the same manner as in Example 1 above, except that the blending amount of Ketjen Black was 5% by mass relative to 100% by mass of EVOH when producing the second conductive layer.

Embodiment 3

[0123] As the first conductive layer, a material with a film thickness of 12.5 μm was used, and the second conductive layer was produced so as to have a film thickness of 37.5 μm. By the same method as in the above-mentioned Example 1, a Bipolar secondary battery.

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
electrical resistivityaaaaaaaaaa
electrical resistivityaaaaaaaaaa
particle diameteraaaaaaaaaa
Login to View More

Abstract

Disclosed is a means that is capable of suppressing absorption of lithium ions into the inner portion of a resin collector that is used in a bipolar lithium ion secondary battery. Specifically disclosed is a collector for a bipolar lithium ion secondary battery, which comprises at least two conductive layers. One of the conductive layers that constitute the collector (a first conductive layer) is configured by adding a conductive filler into a base that contains an imide group-containing resin. The other of the conductive layers that constitute the collector (a second conductive layer) is configured by adding a conductive filler into a base that contains a polar resin containing no imide group. The collector for a bipolar lithium ion secondary battery is further characterized in that when a bipolar electrode is formed, the first conductive layer is arranged on the positive electrode side.

Description

technical field [0001] The present invention relates to a current collector for a bipolar lithium ion secondary battery, a bipolar electrode for a lithium ion secondary battery using the current collector, and a bipolar lithium ion secondary battery. Background technique [0002] In recent years, hybrid electric vehicles (HEV), electric vehicles (EV), and fuel cell vehicles have been manufactured and sold from the viewpoint of the environment and fuel consumption, and new developments are continuing. In these so-called electric vehicles, effective use of a power supply device capable of discharging and charging is indispensable. As such a power supply device, secondary batteries such as lithium-ion batteries and nickel-metal hydride batteries, electric double layer capacitors, and the like can be used. In particular, lithium-ion secondary batteries are considered to be suitable for electric vehicles due to their high energy density and high durability against repeated charg...

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): H01M4/66H01M10/052H01M10/0585
CPCY02E60/12H01M10/044Y02E60/122H01M4/667H01M10/0525H01M10/0418H01M4/668H01M10/052Y02T10/7011H01M10/0585Y02E60/10Y02P70/50H01M4/66H01M4/666Y02T10/70
Inventor 本田崇田中康行井深重夫市川聪
Owner NISSAN MOTOR 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