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

Bipolar secondary cell and method for producing the same

一种二次电池、双极型电极的技术，应用在二次电池、二次电池制造、双极电极等方向，能够解决电池不利、电池输出密度和能量密度劣化、电池能量输出降低等问题

Active Publication Date: 2012-02-01
NISSAN MOTOR CO LTD
View PDF4 Cites 27 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, when the batteries are connected to each other via the connectors, the energy output of the batteries decreases due to the resistance of the connectors
Also, batteries with connectors are a disadvantage in terms of space efficiency
That is, the use of connectors leads to deterioration of battery output density and energy density

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
  • Bipolar secondary cell and method for producing the same
  • Bipolar secondary cell and method for producing the same
  • Bipolar secondary cell and method for producing the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0098] The positive electrode active material slurry was prepared by mixing: 85% by mass of LiMn as the positive electrode active material 2 o 4 , 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 (NMP) as a slurry viscosity adjustment solvent . Negative electrode active material slurry was prepared by mixing: 85% by mass of Li as the negative electrode active material 4 Ti 5 o 12 , 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 (NMP) as a slurry viscosity adjustment solvent ). In addition, a conductive resin layer (thickness: 30 μm, volume resistivity in the thickness direction: 1×10 -2 The current collector is provided in the form of Ω·cm). A positive electrode active material layer is formed on one side of the current collector by appl...

Embodiment 2

[0100] A bipolar electrode was produced in the same manner as in Example 1 except that polypropylene was used as the base material of the current collector.

Embodiment 3

[0102] A bipolar electrode was produced in the same manner as in Example 1 except that polyimide was used as the base material of the collector.

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
particle diameteraaaaaaaaaa
particle diameteraaaaaaaaaa
particle diameteraaaaaaaaaa
Login to View More

Abstract

Provided is a bipolar secondary cell comprised of first and second bipolar electrodes and a separator. The first and second bipolar electrodes are provided with a power collecting element composed of a first resin as a base material and a conductive resin layer; a positive-electrode active material layer formed on one surface of the power collecting element; and a negative-electrode active material layer formed on the other surface of the power collecting element. The separator is disposed between the first and second bipolar electrodes and composed of a second resin as a base material, and holds electrolyte to form an electrolyte layer. The bipolar secondary cell is comprised of a power generating element provided with an electric cell layer composed of the positive-electrode active material layer of the first bipolar electrode, the electrolyte layer, and the negative-electrode active material layer of the second bipolar electrode. The melting point of the first resin is not more than that of the second resin. The peripheral edges of the power collecting elements of the first and second bipolar electrodes are fusion-bonded to the peripheral edge of the separator, to seal the outer periphery of the electric cell layer.

Description

technical field [0001] The present invention relates to a bipolar secondary battery in which a sealing portion for preventing leakage of an electrolytic solution from a unit cell has good sealing durability and a production method thereof. Background technique [0002] In recent years, from the viewpoint of environmental protection and improvement of fuel efficiency, hybrid electric vehicles (HEV), electric vehicles (EV) and fuel cell vehicles have been manufactured, sold and continuously developed. In these so-called electric vehicles it is necessary to use a rechargeable / dischargeable power source. As such power sources, secondary batteries such as lithium ion batteries and nickel metal hydride batteries, and electric double layer capacitors are used. In particular, lithium ion batteries are suitable for use in electric vehicles due to high energy density and high durability against repeated charge / discharge cycles. Various developments have been made on lithium ion batt...

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): H01M10/0585H01M2/16H01M2/20H01M4/66H01M10/052H01M50/417H01M50/423H01M50/426H01M50/491
CPCH01M10/0585H01M4/668H01M2/1653H01M10/0525H01M10/0418H01M2004/029Y02E60/122H01M4/667H01M4/666Y02T10/7011H01M2/1673H01M2/08Y10T29/4911Y10T29/49114Y02E60/10H01M50/46Y02P70/50H01M50/417H01M50/491H01M50/423H01M50/426H01M10/044Y02T10/70
Inventor 保坂贤司小比贺基治
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