公开(公告)号：US11228195B2

公开(公告)日：2022-01-18

申请号：US16389951

申请日：2019-04-21

Applicant: StoreDot Ltd.

Inventor： Daniel Aronov ,  Avraham Edelshtein ,  Ohad Goldbart ,  Simon Litsyn ,  Nicky Zintchenko Nachshony

IPC: H02J7/00 ,  H01M10/48 ,  H01M10/44 ,  H01M10/0525

Abstract: Systems and methods are provided for operating lithium ion devices by setting an operative capacity below a rated capacity value of the lithium ion device, and operating the lithium ion device at the set operative capacity by decreasing a lower voltage cutoff value during discharging and/or by increasing an upper voltage cutoff level during charging—to support operation at the set operative capacity. The systems and methods may utilize residual lithium in device components such as anodes, cathodes, electrolyte etc. or combinations thereof, and/or external lithiation to increase the cycling lifetime of the lithium ion devices, to adapt to user preferences and expected use profiles, and to simplify device status indications to the user. Advantageously, relatively simple circuitry is required to implement the provided methods and systems, and achieve customizable operation of the lithium ion devices.

公开(公告)号：US11218011B2

公开(公告)日：2022-01-04

申请号：US16395643

申请日：2019-04-26

Applicant: StoreDot Ltd.

Inventor： Daniel Aronov ,  Avraham Edelshtein ,  Amir Tirosh ,  Doron Myersdorf

IPC: H02J7/00 ,  H01M4/38 ,  H01M10/44 ,  H01M4/02

Abstract: Charging systems and methods are provided, which increase charging currents and reduce charging durations for battery cells with metalloid-based anodes that enable high C-rate (charging rate) charging. Specifically, methods comprise charging battery cells having metalloid-based anodes having Si, Ge and/or Sn-based anode active material, by providing a high-C charging current of at least 4 C (or 5 C, or 10 C or more) over a range of at least 10-70% SoC (state of charge) of the battery cells. Charging systems comprise a booster unit configured to provide a high-C charging current over at least most of the SoC range of battery cells having metalloid-based anodes in the at least one battery unit. Charging systems further comprise a user interface configured to receive user preferences concerning a specified charging duration and/or a specified target SoC—for implementation by the charging system.

公开(公告)号：US11205796B2

公开(公告)日：2021-12-21

申请号：US16291031

申请日：2019-03-04

Applicant: StoreDot Ltd.

Inventor： Eran Sella ,  Mor Shmuel Armon

IPC: H01M10/052 ,  H01M10/0569 ,  H01M4/136 ,  H01M10/0525 ,  H01M10/42 ,  H01M4/134 ,  H01M4/131 ,  H01M10/0567

Abstract: Lithium ion batteries and electrolytes therefor are provided, which include electrolyte additives having dithioester functional group(s) that stabilize the SEI (solid-electrolyte interface) at the surfaces of the anode material particles, and/or stabilize the CEI (cathode electrolyte interface) at the surfaces of the cathode material particles, and/or act as oxygen scavengers to prevent cell degradation. The electrolyte additives having dithioester functional group(s) may function as polymerization controlling and/or chain transfer agents that regulate the level of polymerization of other electrolyte components, such as VC (vinyl carbonate) and improve the formation and operation of the batteries. The lithium ion batteries may have metalloid-based anodes—including mostly Si, Ge and/or Sn as anode active material particles.

公开(公告)号：US20210242497A1

公开(公告)日：2021-08-05

申请号：US16774005

申请日：2020-01-28

Applicant: StoreDot Ltd.

Inventor： Ido Herzog ,  Shirel Cohen ,  Rony Schwarz ,  Eran Sella

IPC: H01M10/0567 ,  H01M10/0525 ,  H01M10/0569 ,  H01M4/525 ,  H01M4/505 ,  H01M4/58 ,  H01M10/0568 ,  H01M4/02

Abstract: Lithium ion batteries and electrolytes therefor are provided, which include electrolyte additives having dithioester functional group(s) that stabilize the SEI (solid-electrolyte interface) at the surfaces of the anode material particles, and/or stabilize the CEI (cathode electrolyte interface) at the surfaces of the cathode material particles, and/or act as oxygen scavengers to prevent cell degradation. The electrolyte additives having dithioester functional group(s) may function as polymerization controlling and/or chain transfer agents that regulate the level of polymerization of other electrolyte components, such as VC (vinyl carbonate) and improve the formation and operation of the batteries. The lithium ion batteries may have metalloid-based anodes including mostly Si, Ge and/or Sn as anode active material particles.

公开(公告)号：US20210210746A1

公开(公告)日：2021-07-08

申请号：US16732528

申请日：2020-01-02

Applicant: Storedot Ltd.

Inventor： Eran SELLA ,  Leora Shapiro ,  Rony Schwarz ,  Moria Koren ,  Maxim Kagan

IPC: H01M4/36 ,  H01M4/38 ,  H01M4/62

Abstract: Methods of preparing Si-based anode slurries and anode made thereof are provided. Methods comprise coating silicon particles within a size range of 300-700 nm by silver and/or tin particles within a size range of 20-500 nm, mixing the coated silicon particles with conductive additives and binders in a solvent to form anode slurry, and preparing an anode from the anode slurry. Alternatively or complementarily, silicon particles may be milled in an organic solvent, and, in the same organic solvent, coating agent(s), conductive additive(s) and binder(s) may be added to the milled silicon particles—to form the Si-based anode slurry. Alternatively or complementarily, milled silicon particles may be mixed, in a first organic solvent, with coating agent(s), conductive additive(s) and binder(s)—to form the Si-based anode slurry. Disclosed methods simplify the anode production process and provide equivalent or superior anodes.

公开(公告)号：US20210203002A1

公开(公告)日：2021-07-01

申请号：US17247851

申请日：2020-12-27

Applicant: STOREDOT LTD.

Inventor： Nir Pour ,  Dafina Meron ,  Daniel Hirshberg ,  Nir Kedem ,  Evgenia LIel Kuks

IPC: H01M10/0569 ,  H01M10/0567 ,  H01M10/0525 ,  H01M4/38 ,  H01M10/0568

Abstract: Fast-charging lithium ion cells are provided, which have electrolytes that do not react with the cell anodes, but instead form a solid-electrolyte interphase (SEI) on the cathodes. Advantageously, such electrolytes improve the performance of the fast-charging cells, and enhance their lifetime and safety. Various electrolyte solutions and lithium ions are proposed to limit electrolyte interactions to the cathodes, or possibly even minimize or prevent these reactions by coating the cathodes. Redox couples may be used to prevent SEI formation on the anode, while promoting SEI formation on the cathode.

公开(公告)号：US10944093B2

公开(公告)日：2021-03-09

申请号：US16237759

申请日：2019-01-02

Applicant: StoreDot Ltd.

Inventor： Ron Paz ,  Yaniv Damtov ,  Daniel Aronov

IPC: H01M4/04 ,  H01M4/66 ,  H01M2/16 ,  H01M10/0585

Abstract: Methods, stacks and electrochemical cells are provided, in which the cell separator is surface-treated prior to attachment to the electrode(s) to form binding sites on the cell separator and enhance binding thereof to the electrode(s), e.g., electrostatically. The cell separator(s) may be attached to the electrode(s) by cold press lamination, wherein the created binding sites are configured to stabilize the cold press lamination electrostatically—forming flexible and durable electrode stacks. Electrode slurry may be deposited on a sacrificial film and then attached to current collector films, avoiding unwanted interactions between materials and in particular solvents involved in the respective slurries. Dried electrode slurry layers may be pressed or calendared against each other to yield thinner, smother and more controllably porous electrodes, as well as higher throughput. The produced stacks may be used in electrochemical cells and in any other type of energy storage device.

公开(公告)号：US10903530B2

公开(公告)日：2021-01-26

申请号：US16390837

申请日：2019-04-22

Applicant: StoreDot Ltd.

Inventor： David Jacob ,  Sergey Remizov ,  Nitzan Shadmi ,  Hani Farran ,  Daniel Aronov ,  Boris Brudnik

IPC: H01M4/134 ,  H01M10/42 ,  H01M10/0525 ,  H01M4/36 ,  H01M4/38 ,  C09D179/02 ,  C09D5/24 ,  H01M4/02

Abstract: Improved anodes and cells are provided, which enable fast charging rates with enhanced safety due to much reduced probability of metallization of lithium on the anode, preventing dendrite growth and related risks of fire or explosion. Anodes and/or electrolytes have buffering zones for partly reducing and gradually introducing lithium ions into the anode for lithiation, to prevent lithium ion accumulation at the anode electrolyte interface and consequent metallization and dendrite growth. Various anode active materials and combinations, modifications through nanoparticles and a range of coatings which implement the improved anodes are provided.

公开(公告)号：US10862104B2

公开(公告)日：2020-12-08

申请号：US16258733

申请日：2019-01-28

Applicant: StoreDot Ltd.

Inventor： Daniel Aronov

IPC: H01M4/134 ,  H01M4/1395 ,  H01M10/0525 ,  H01M4/02 ,  H01M4/38

Abstract: Electrodes, production methods and mono-cell batteries are provided, which comprise active material particles embedded in electrically conductive metallic porous structure, dry-etched anode structures and battery structures with thick anodes and cathodes that have spatially uniform resistance. The metallic porous structure provides electric conductivity, a large volume that supports good ionic conductivity, that in turn reduces directional elongation of the particles during operation, and may enable reduction or removal of binders, conductive additives and/or current collectors to yield electrodes with higher structural stability, lower resistance, possibly higher energy density and longer cycling lifetime. Dry etching treatments may be used to reduce oxidized surfaces of the active material particles, thereby simplifying production methods and enhancing porosity and ionic conductivity of the electrodes. Electrodes may be made thick and used to form mono-cell batteries which are simple to produce and yield high performance.

公开(公告)号：US20200303930A1

公开(公告)日：2020-09-24

申请号：US16360272

申请日：2019-03-21

Applicant: StoreDot Ltd.

Inventor： Avraham EDELSHTEIN ,  Daniel ARONOV

IPC: H02J7/00 ,  G01R31/382 ,  H01M10/42

Abstract: Systems and methods are provided for balancing battery modules following fast charging, particularly with respect to fast charging lithium ion batteries with metalloid-based anodes. Charge balancing among multiple battery modules connected in series may be carried out by short-circuiting fully charged modules while adjusting the voltage and/or current level supplied by a charger, to fully charge remaining modules. A balancing module comprising a controller and switching circuitry may be configured to implement the charge balancing in association with the charger and its battery management system, and monitoring the battery modules. Advantageously, disclosed switching balancing is more efficient than prior art passive balancing and simpler in implementation than prior art active balancing.