公开(公告)号：US10597783B2

公开(公告)日：2020-03-24

申请号：US15471029

申请日：2017-03-28

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Haijing Liu ,  Zhiqiang Yu ,  Xiaochao Que

IPC: H01M4/80 ,  C23C18/12 ,  H01M4/66 ,  H01M4/04 ,  C23C22/00

Abstract: A copper foil, intended for use as a current collector in a lithium-containing electrode for a lithium-based electrochemical cell, is subjected to a series of chemical oxidation and reduction processing steps to form a field of integral copper wires extending outwardly from the surfaces of the current collector (and from the copper content of the foil) to be coated with a resin-bonded porous layer of particles of active electrode material. The copper wires serve to anchor thicker layers of porous electrode material and enhance liquid electrolyte contact with the electrode particles and the current collector to improve the energy output of the cell and its useful life.

公开(公告)号：US20180342722A1

公开(公告)日：2018-11-29

申请号：US15604759

申请日：2017-05-25

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Sherman Zeng ,  Xiaochao Que ,  Haijing Liu

IPC: H01M2/26 ,  H01M2/20 ,  H01M2/30 ,  H01M4/70 ,  H01M10/0525 ,  H01M10/0585

CPC classification number: H01M2/26 ,  H01M2/206 ,  H01M2/305 ,  H01M4/70 ,  H01M10/0525 ,  H01M10/0585 ,  H01M2220/20

Abstract: Lithium battery cells, and battery packs comprising the same, include an electrolyte, and an anode and a cathode, each of which include a current collector having a length, the length defining a first end and a second end, a width, a host or active material disposed on the current collector between the first end and the second end, a first tab extending from the first end, and a second tab extending from the second end. A plurality of cells can be stacked in a planar configuration, and a plurality of anode first tabs, a plurality of anode second tabs, a plurality of cathode first tabs, and a plurality of cathode second tabs can each be electrically connected via a respective busbar. The anode and cathode can have a length:width ratio of at least three, or 2.5 to 10. The battery cell can be a power source for an electric/hybrid vehicle.

公开(公告)号：US20170098817A1

公开(公告)日：2017-04-06

申请号：US15311862

申请日：2014-05-21

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Zhiqiang Yu ,  Meiyuan Yu ,  Xiaochao Que ,  Jianyong Liu

IPC: H01M4/04 ,  H01M4/1391 ,  H01M10/0525 ,  H01M4/505 ,  H01M4/62 ,  H01M4/66 ,  H01M4/131 ,  H01M4/525

CPC classification number: H01M4/0404 ,  H01M4/131 ,  H01M4/139 ,  H01M4/1391 ,  H01M4/505 ,  H01M4/525 ,  H01M4/623 ,  H01M4/625 ,  H01M4/661 ,  H01M10/052 ,  H01M10/0525 ,  H01M2004/027 ,  H01M2004/028 ,  H01M2220/20

Abstract: Improved electrodes for lithium battery cells are made by coating micrometer-size anode or cathode material particles with aggregates of smaller conductive carbon black particles in two mixing steps, using a liquid dispersant in each step for the mixing particles. A first portion of carbon black is vigorously mixed with the electrode particles to coat their surfaces with the smaller carbon black particles. A second portion of carbon black is less vigorously mixed with the initially coated electrode particles to form clusters of carbon black particles at the interfaces of the previously coated electrode particles. This two-step distribution of carbon black particles increases the power capacity of the porous electrode layer bonded to its current collector and increases the life of its battery cell.