公开(公告)号：US11063458B1

公开(公告)日：2021-07-13

申请号：US14836529

申请日：2015-08-26

Applicant: Google LLC

Inventor： Tai Sup Hwang ,  Ramesh C. Bhardwaj

IPC: H02J7/00

Abstract: This disclosure relates to systems and methods for charging a battery. An example embodiment may include a battery, a battery charger device and a controller. The controller is configured to cause the battery charger device to charge the battery with a plurality of pulses and rests. Each pulse includes a respective pulse duration and a respective pulse current. Each rest includes a respective rest duration. While in a first charge phase, the controller is configured to adjust at least one of: the respective pulse duration, the respective pulse current, or the respective rest duration based on at least one sample of a characteristic voltage of the battery. Subsequently, the controller is configured to initiate a second charging phase. The controller is further configured to cause the battery charger device to charge the battery according to a second charge waveform.

公开(公告)号：US10218033B1

公开(公告)日：2019-02-26

申请号：US14927922

申请日：2015-10-30

Applicant: Google LLC

Inventor： Ramesh C. Bhardwaj ,  Tai Sup Hwang ,  Sujeet Kumar ,  Bing Li ,  Swapnil Dalavi ,  Shabab Amiruddin

IPC: H01M10/0567 ,  H01M10/0525 ,  H01M10/0568 ,  H01M10/0569 ,  H01M10/0587 ,  H01M4/525 ,  H01M4/48 ,  H01M4/02

Abstract: This disclosure relates to a battery and a method for its manufacture. An example method includes forming an anode comprising silicon monoxide and a forming a cathode comprising lithium cobalt oxide. The method also includes arranging the anode, the cathode, and a separator in a layered arrangement. The method further includes winding the layered arrangement to form a wound arrangement, compressing the wound arrangement, and packing it into a pouch. The method yet further includes soaking the wound arrangement in an electrolyte for a predetermined time and at a predetermined temperature. The electrolyte includes a lithium hexafluorophosphate salt dissolved in a solvent including ethylene carbonate and diethylene carbonate in about a 1:2 volume ratio. The additive includes fluoroethylene carbonate in an 8-12% weight ratio.

公开(公告)号：US10770692B1

公开(公告)日：2020-09-08

申请号：US14823050

申请日：2015-08-11

Applicant: Google LLC

Inventor： Ramesh C. Bhardwaj ,  Tai Sup Hwang

IPC: H01M2/02 ,  H01M10/052 ,  H01M10/0562 ,  H01M4/64 ,  G06F1/16

Abstract: An example system includes an enclosure of a mobile computing device, where the enclosure includes an external surface and an internal surface. The system also includes a lithium-based battery having a plurality of battery layers deposited on the external surface of the enclosure such that the enclosure is a substrate for the plurality of battery layers. The plurality of battery layers include at least (i) a first conductive layer plated on a portion of the external surface of the enclosure, where the first conductive layer is configured as a cathode current collector of the lithium-based battery, and (ii) a second conductive layer plated on a respective portion of the external surface of the enclosure, where the second conductive layer is configured as a portion of an anode current collector of the lithium-based battery.

公开(公告)号：US10424779B1

公开(公告)日：2019-09-24

申请号：US15259037

申请日：2016-09-07

Applicant: Google LLC

Inventor： Ramesh C Bhardwaj ,  Tai Sup Hwang

IPC: H01M4/134 ,  H01M10/0525 ,  H01M10/0587 ,  H01M4/136 ,  H01M4/48 ,  H01M4/58 ,  H01M4/38 ,  H01M4/505 ,  H01M4/525 ,  H01M4/131 ,  H01M2/16 ,  H01M4/04 ,  H01M2/14 ,  H01M10/04 ,  H01M2/02 ,  H01M10/44 ,  H01M10/52

Abstract: The present disclosure relates to lithium-ion batteries and methods for their manufacture. Specifically, the method includes forming a cathode on a first substrate and forming an anode on a second substrate. The anode material includes silicon. The method includes slitting the first substrate and the second substrate. After slitting the respective substrates, the method includes depositing stabilized lithium metal particles on the anode and forming a cathode electrode tab coupled to the cathode and an anode electrode tab coupled to the anode. The method also includes coupling the anode and the cathode to form a layered structure. The method further includes winding the layered structure to form a rolled structure and placing the rolled structure in a container. The method additionally includes placing an electrolyte in the container sealing the container with the rolled structure and electrolyte placed therein to form a battery.