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

Lithium ion battery repeating unit, lithium ion battery, using method of lithium ion battery, battery module and automobile

A lithium-ion battery, repeating unit technology, applied in the direction of secondary battery charging/discharging, battery pack components, non-aqueous electrolyte battery electrodes, etc., can solve safety problems, low battery energy density and other problems, achieve energy improvement, overcome Poor rate performance, the effect of overcoming the risk of short circuit

Active Publication Date: 2021-01-12
BYD CO LTD
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present disclosure is to provide a lithium-ion battery repeating unit, a lithium-ion battery and its usage method, a battery module and a car, so as to solve the problem of low battery energy density and the safety problem caused by lithium dendrites in the prior art

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 repeating unit, lithium ion battery, using method of lithium ion battery, battery module and automobile
  • Lithium ion battery repeating unit, lithium ion battery, using method of lithium ion battery, battery module and automobile
  • Lithium ion battery repeating unit, lithium ion battery, using method of lithium ion battery, battery module and automobile

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach

[0073] In a specific embodiment, the metal body with surface pores may have micropores. For example, in one embodiment, the metal body with surface pores may have two main surfaces perpendicular to the stacking direction, wherein at least one of the main surfaces may be formed There are micropores. Among them, micropores of a certain depth can be formed on the non-porous base metal by methods such as in-situ generation, chemical and physical deposition, and corrosion formation, so as to obtain a metal body with surface pores. For example, use micron copper or copper alloy foil, and use physical vapor deposition (PVD) or chemical vapor deposition (CVD) to deposit a certain thickness of porous metal copper or carbon on the two sides of the foil; or, micron copper or copper The alloy foil is placed in an acidic or alkaline chemical corrosion solution and corroded for a certain period of time to form corrosion holes on both sides.

[0074] In another preferred embodiment, refer t...

Embodiment approach

[0075] Further, the solid metal part 22 may be a solid metal body (such as metal foil, metal sheet, metal cloth, etc.). The thickness of the solid metal part 22 may be 1-50 μm, preferably 5-15 μm. The first porous part 21 and the second porous part 23 can be respectively porous metal material, porous carbon material or porous oxide material, such as copper mesh or copper foam. The thicknesses of the first porous portion 21 and the second porous portion 23 may each be 1 to 50 μm, preferably 5 to 15 μm. In this embodiment, the first porous part 21, the solid metal part 22 and the second porous part 23 can be stacked in sequence and then connected into a whole through physical pressing, or bonded and fired into a whole, so as to obtain a Porous metal body. For example, in one embodiment, copper mesh (or copper foam), copper foil, and copper mesh (or copper foam) can be welded together with superimposed current in sequence to obtain a metal body with surface pores.

[0076] Fur...

Embodiment 1

[0096] 1. Preparation of positive electrode: Weigh the positive active material (LiCoO 2 ) 1kg, conductive agent carbon nanotube 20g and binding agent polyvinylidene fluoride (PVDF) 20g join in the N-methylpyrrolidone of 1kg, then stir 30min in the stirrer, form stable and uniform slurry; The slurry Coat evenly on aluminum foil, transfer to an oven to dry at 80°C; press the dried pole pieces under 2MPa pressure, cut them into 50mm×75mm pole pieces, and spot-weld the positive lugs, surface density 30mg / cm 2 .

[0097] 2. Preparation of the separator: take a common commercial 11 μm PVDF-coated lithium battery PE separator and cut it into 77 mm wide.

[0098] 3. Preparation of the first negative electrode: take a common commercial 11 μm PVDF-coated lithium battery PE separator (insulating layer), and hot-press it with a 20 μm thick copper mesh (conductor layer) at 120 ° C for 30 seconds at a pressure of 1 MPa. The copper mesh porosity is 50%, the aperture is 1mm. Weigh 1 kg o...

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
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

The invention relates to a lithium ion battery repeating unit, a lithium ion battery, a use method of the lithium ion battery, a battery module and an automobile. The repeating unit comprises a positive electrode, a first diaphragm and a negative electrode which are sequentially stacked in the stacking direction, and the negative electrode comprises a first negative electrode and a second negativeelectrode which are not electrically contacted with each other during charging; the first negative electrode comprises an active material layer, a conductor layer and an insulating layer; and in thenegative electrode, the active material layer, the conductor layer, the insulating layer, the second negative electrode, the insulating layer, the conductor layer and the active material layer are sequentially stacked according to the stacking direction. The lithium ion battery disclosed by the invention is relatively high in energy density, and the safety problem caused by lithium dendrites in anexisting battery can be solved.

Description

technical field [0001] The present disclosure relates to the battery field, in particular, to a lithium-ion battery repeating unit, a lithium-ion battery and a method for using the same, a battery module and an automobile. Background technique [0002] At present, there are generally two types of batteries used in the market: one is an energy conversion device represented by a fuel flow battery or a liquid flow battery that separates the energy storage active material from the stack that provides a chemical reaction site; the other is a positive electrode, The diaphragm and the negative electrode are uniformly laminated or wound, and the active material is distributed on the positive electrode and the negative electrode to form an energy conversion device that stores energy and power as a whole. The lithium-ion battery belongs to the typical second type, and its positive electrode, separator, and negative electrode are evenly arranged in opposite directions. The positive el...

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): H01M10/0585H01M10/0525H01M4/13H01M10/0562H01M10/0565H01M50/249H01M10/44
CPCH01M4/13H01M10/0525H01M10/0562H01M10/0565H01M10/0585H01M10/44Y02E60/10Y02P70/50
Inventor 李世彩王蒙焦晓朋李向辉甘永青
Owner BYD 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