公开(公告)号：US20210399371A1

公开(公告)日：2021-12-23

申请号：US17304648

申请日：2021-06-23

Applicant: STOREDOT LTD

Inventor： Assaf ZEHAVI ,  Nir Dolev ,  Tzemah KISLEV

IPC: H01M50/186 ,  H01M10/04 ,  H01M50/184

Abstract: A method for managing gas generated during a formation phase of a cell that is a hard-case electrochemical cell, the method may include supplying electrolyte to the cell; initially charging and discharging the cell during a formation phase; and permanently sealing the cell; wherein the method further comprises temporarily sealing the electrolyte during the formation phase.

公开(公告)号：US11152602B2

公开(公告)日：2021-10-19

申请号：US16689261

申请日：2019-11-20

Applicant: StoreDot Ltd.

Inventor： Assaf Grunwald ,  Leonid Krasovitsky ,  Dmitry Voyevodin

IPC: H02J7/00 ,  H01M4/04 ,  H01M10/0525 ,  H01M4/38 ,  H01M10/44 ,  H01M10/48 ,  H01M4/02

Abstract: Methods and systems are provided for estimating and extending the expected cell cycling lifetime for produced lithium ion cells. Methods comprise monitoring charging and/or discharging peak(s) during formation cycles of the cells, which are defined with respect to dQ/dV measurements during the formation cycles, and ending the formation process once the charging and/or discharging peaks disappear, optionally deriving the expected cell cycling lifetime by comparing the monitored peaks to specified thresholds that are correlated to the lifetime. The methods may be implemented by controller(s) at the battery, device and/or factory levels, which may be operated in combination. Formation processes and/or cell operation schemes may be adjusted accordingly, to avoid excessive dQ/dV rates and increase thereby the cell cycling lifetime.

公开(公告)号：US11128152B2

公开(公告)日：2021-09-21

申请号：US15678143

申请日：2017-08-16

Applicant: StoreDot Ltd.

Inventor： Daniel Aronov ,  Leonid Krasovitsky

IPC: H02J7/00 ,  H02J7/34

Abstract: The present invention discloses systems and methods for adaptive fast-charging for mobile devices and devices having sporadic power-source connection. Methods include the steps of: firstly determining whether a supercapacitor of a device is charged; upon detecting the supercapacitor is charged, secondly determining whether a battery of the device is charged; and upon detecting the battery is not charged, firstly charging the battery from the supercapacitor. Preferably, the step of firstly determining includes whether the supercapacitor is partially charged, and the step of secondly determining includes whether the battery is partially charged. Preferably, the step of firstly charging is adaptively regulated to perform a task selected from the group consisting of: preserving a lifetime of the battery by controlling a current to the battery, and discharging the supercapacitor in order to charge the battery. Preferably, the discharging enables the supercapacitor to be subsequently recharged.

公开(公告)号：US20210242500A1

公开(公告)日：2021-08-05

申请号：US16774003

申请日：2020-01-28

Applicant: StoreDot Ltd.

Inventor： Nir KEDEM ,  Liron AMIR ,  Evgenia Liel (Jeny) KUKS ,  Ido HERZOG ,  Shirel COHEN ,  Rony SCHWARZ ,  Eran SELLA

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

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：US11069918B2

公开(公告)日：2021-07-20

申请号：US16157128

申请日：2018-10-11

Applicant: StoreDot Ltd.

Inventor： Zohar Drach ,  Olga Guchok ,  Leonid Krasovitsky ,  Ekaterina Gotlib Vainshtein ,  Liron Amir

IPC: H01M10/052 ,  H01M10/0569 ,  H01M10/0567

Abstract: Electrolytes, lithium ion cells and corresponding methods are provided, for extending the cycle life of fast charging lithium ion batteries. The electrolytes are based on fluoroethylene carbonate (FEC) and/or vinylene carbonate (VC) as the cyclic carbonate component, and possibly on ethyl acetate (EA) and/or ethyl methyl carbonate (EMC) as the linear component. Proposed electrolytes extend the cycle life by factors of two or more, as indicated by several complementary measurements.

公开(公告)号：US10916811B2

公开(公告)日：2021-02-09

申请号：US16268527

申请日：2019-02-06

Applicant: StoreDot Ltd.

Inventor： Doron Burshtain ,  Daniel Aronov ,  Eran Sella

IPC: H01M10/42 ,  H01M10/0525 ,  H01M10/0567 ,  H01M10/0562

Abstract: Electrolytes, anode material particles and methods are provided for improving performance and enhancing the safety of lithium ion batteries. Electrolytes may comprise ionic liquid(s) as additives which protect the anode material particles and possibly bind thereto; and/or may comprise a large portion of fluoroethylene carbonate (FEC) and/or vinylene carbonate (VC) as the cyclic carbonate component, and possibly ethyl acetate (EA) and/or ethyl methyl carbonate (EMC) as the linear component; and/or may comprise composite electrolytes having solid electrolyte particles coated by flexible ionic conductive material. Ionic liquid may be used to pre-lithiate in situ the anode material particles. Disclosed electrolytes improve lithium ion conductivity, prevent electrolyte decomposition and/or prevents lithium metallization on the surface of the anode.

公开(公告)号：US20200343543A1

公开(公告)日：2020-10-29

申请号：US16394112

申请日：2019-04-25

Applicant: StoreDot Ltd.

Inventor： Ohad GOLDBART ,  Nitzan SHADMI ,  Hani FARRAN ,  Daniel ARONOV

IPC: H01M4/38 ,  H01M10/0525 ,  H01M4/36 ,  H01M4/62 ,  H01M4/136 ,  H01M4/1397

Abstract: Methods, anode material particles, mixtures, anodes and lithium-ion batteries are provided, having passivated silicon-based particles that enable processing in oxidizing environments such as water-based slurries. Methods comprise forming a mixture of silicon particles with nanoparticles (NPs) and a carbon-based binders and/or surfactants, wherein the NPs comprise at least one of: metalloid oxide NPs, metalloid salt NPs and carbon NPs, reducing the mixture to yield a reduced mixture comprising coated silicon particles with a coating providing a passivation layer (possibly amorphous), and consolidating the reduced mixture to form an anode. It is suggested that the NPs provide nucleation sites for the passivation layer on the surface of the silicon particles—enabling significant anode-formation process simplifications such as using water-based slurries—enabled by disclosed methods and anode active material particles.

公开(公告)号：US10818919B2

公开(公告)日：2020-10-27

申请号：US16157152

申请日：2018-10-11

Applicant: STOREDOT LTD.

Inventor： Doron Burshtain ,  Nir Kedem ,  Eran Sella ,  Daniel Aronov ,  Hani Farran ,  Leora Shapiro

IPC: H01M4/1395 ,  H01M4/36 ,  H01M4/62 ,  H01M4/485 ,  H01M4/60 ,  H01M4/134 ,  H01M4/137 ,  H01M4/1399 ,  H01M4/04 ,  H01M10/0525 ,  H01M4/38 ,  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：US20200255557A1

公开(公告)日：2020-08-13

申请号：US16711484

申请日：2019-12-12

Applicant: Storedot Ltd.

Inventor： Eran SELLA ,  Maxim KAGAN ,  Ekaterina GOTLIB VAINSHTEIN

IPC: C08F20/06 ,  H01M4/38 ,  H01M4/62 ,  H01M10/0525

Abstract: Li-PAA (lithium poly(acrylic acid)) powders, electrode binders and methods of preparation thereof are provided. The Li-PAA powders have a low PDI (polydispersity index), e.g., smaller than 4 or 5, possibly a high Mw, and are configured to have a lithium content of above 7%, a pH between 8.5 and 9.5, or between 8.7 and 9.1 when dissolved 15% w/w in water and/or possibly a white color. Preparation methods comprise adding a PAA solution into a LiOH solution and stirring a resulting Li-PAA solution, and precipitating Li-PAA from the resulting Li-PAA solution, sieving or filtering and then drying the precipitated Li-PAA to yield the Li-PAA powder, which may be used as binder for forming electrodes. Advantageously, resulting electrodes are uniform and mechanically stable when used with metalloid anode material particles which exhibit high expansion and contraction when used in fast charging lithium ion batteries.

公开(公告)号：US20200243845A1

公开(公告)日：2020-07-30

申请号：US16504273

申请日：2019-07-07

Applicant: StoreDot Ltd.

Inventor： Eran SELLA ,  Daniel Aronov

IPC: H01M4/1395 ,  H01M4/134 ,  H01M10/0525 ,  H01M4/62

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.