Granted Patent B2

US 12,498,015 · App. 18/724,626 · Granted Dec 16, 2025

Inventors: Ilan Ben David (Rosh Haayin, IL); Rotem Ezer (Ganei Tikva, IL)

Assignee: ZOOZ POWER LTD.

F16F15/30F16F15/3153H02K7/025Y02E60/16

Abstract

Claims (42)

1 . A flywheel assembly comprising:

a plurality of stacked plates, a first end plate of the plurality of plates defining a first end of a rotor and a second end plate of the plurality of plates defining a second end of the rotor; and

a pair of shafts, each extending from a respective one of the first end and the second end of the rotor along a rotational axis of the rotor,

wherein a perimeter of each of the first and second end plates exhibits a respective plurality of teeth.

2 . The flywheel assembly of claim 1 , wherein, for each of the first and second end plates, each of the respective plurality of teeth exhibits a respective hole.

3 . The flywheel assembly of claim 2 , wherein each of the first and second end plates exhibits an outer face and an inner face opposing the outer face, the inner face of the first end plate facing the inner face of the second end plate, and

wherein, for each of the first and second end plates, the respective holes extend from the respective outer face into the respective one of the first and second end plates.

4 . The flywheel assembly of claim 3 , further comprising a pair of securing members, each of the pair of securing members secured to the outer face of a respective one of the first and second end plates,

wherein each of the pair of shafts is secured to a respective one of the pair of securing members.

5 . The flywheel assembly of claim 2 , wherein, for each of the first and second end plates, the volume of each of the respective holes is defined such that a center of mass of the flywheel assembly lies on the rotational axis extending through the pair of shafts.

6 . The flywheel assembly of claim 1 , wherein the rotation axis is a symmetry axis.

7 . The flywheel assembly of claim 1 , wherein, for each of the first and second end plates, each of the respective plurality of teeth do not extend past a circumference of each of the plurality of stacked plates.

8 . The flywheel assembly of claim 1 , wherein each of the plurality of stacked plates are circular, and

wherein the radii of the plurality of stacked plates are equal to each other.

9 . The flywheel assembly of claim 1 , further comprising a filler material, a respective predetermined amount of the filler material being deposited between each adjacent pair of the plurality of stacked plates.

10 . The flywheel assembly of claim 9 , wherein each respective predetermined amount of the filler material is defined such that the respective pair of adjacent plates are parallel to each other.

11 . The flywheel assembly of claim 9 , wherein the filler material is an adhesive material.

12 . The flywheel assembly of claim 1 , further comprising a plurality of rods,

wherein the rotor comprises a plurality of channels, each channel extending through the plurality of stacked plates from the first end of the rotor to the second end of the rotor, and

wherein each of the plurality of rods is inserted within a respective one of the plurality of channels.

13 . A method for manufacturing a flywheel assembly, the method comprising:

for each of a plurality of stacks of plates, applying a respective predetermined amount of adhesive filler material between each pair of adjacent plates;

for each of the plurality of stacks of plates, securing the respective stack of plates between two parallel reference plates;

stacking the plurality of stacks of plates to define a rotor;

securing the stacked stacks of plates to each other; and

securing each of a pair of shafts to a respective end of the rotor,

wherein the method further comprises:

after solidification of the filler material, creating a plurality of channels in each of the plurality of stacks of plates; and

inserting a plurality of rods through the created channels of the plurality of stacks of plates, the securing the stacked stacks of plates to each other being responsive to the inserted rods.

14 . A method for manufacturing a flywheel assembly, the method comprising:

for each of a plurality of stacks of plates, applying a respective predetermined amount of adhesive filler material between each pair of adjacent plates;

for each of the plurality of stacks of plates, securing the respective stack of plates between two parallel reference plates;

stacking the plurality of stacks of plates to define a rotor;

securing the stacked stacks of plates to each other; and

securing each of a pair of shafts to a respective end of the rotor,

wherein the plurality of stacks of plates comprises a first stack of end plates, a second stack of end plates and a plurality of stacks of intermediate plates stacked between the first and second stacks of end plates,

wherein each of the first stack of end plates comprises a plurality of teeth in a perimeter thereof, each tooth of each plate of the first stack of end plates aligned with a respective tooth of each of the remainder of plates of the first stack of end plates,

wherein each of the second stack of end plates comprises a plurality of teeth in a perimeter thereof, each tooth of each plate of the second stack of end plates aligned with a respective tooth of each of the remainder of plates of the second stack of end plates,

wherein each tooth of at least one of the first stack of end plates comprises a respective hole therein and each tooth of at least one of the second stack of end plates comprises a respective hole therein, and

wherein the method further comprises:

determining a position of a center of mass of the flywheel assembly; and

responsive to the determined position, expanding one or more of the plurality of holes such that the center of mass of the flywheel assembly lies on a rotational axis extending through the pair of shafts.

Assignments (2)

Priority Claims (1)

Continuity (1)

References Cited (40)