公开(公告)号：US20230318081A1

公开(公告)日：2023-10-05

申请号：US18125771

申请日：2023-03-24

Applicant: Mazda Motor Corporation

Inventor： Takashi YAMAMOTO ,  Toshiki TAKAHASHI

IPC: H01M10/6555 ,  H01M50/209 ,  H01M10/6568 ,  H01M10/63

CPC classification number: H01M10/6555 ,  H01M50/209 ,  H01M10/6568 ,  H01M10/63

Abstract: A battery unit temperature management device may include a plurality of battery units, a flow channel through which a heat exchange medium circulates so as to pass through the battery units, a plurality of changing structures provided to correspond to the battery units to make changes of heat transfer capacities between the battery units and the heat exchange medium, and a controller that controls, for each of the battery units, the change of the heat transfer capacity, by using each of the changing structures to reduce the temperature difference among the battery units.

公开(公告)号：US20230318067A1

公开(公告)日：2023-10-05

申请号：US18126511

申请日：2023-03-27

Applicant: Mazda Motor Corporation

Inventor： Takashi YAMAMOTO ,  Toshiki TAKAHASHI

IPC: H01M10/615 ,  H01M10/659 ,  H01M10/637 ,  H01M10/6554

CPC classification number: H01M10/615 ,  H01M10/659 ,  H01M10/637 ,  H01M10/6554

Abstract: A battery unit temperature management device may include a battery unit that can be charged and discharged, a heater that operates due to electricity supply from the battery unit and heats a heat exchange medium that exchanges heat with the battery unit, a changing structure that changes a heat transfer capacity between the battery unit and the heat exchange medium, and a controller that controls the heating of the heat exchange medium by the heater and the change of the heat transfer capacity by the changing structure. When a temperature Tw of the heat exchange medium does not reach a first temperature which is equivalent to a temperature of the battery unit while the heat exchange medium is heated by the heater, the controller may make the heat transfer capacity smaller than that when the temperature of the heat exchange medium has reached the first temperature.

公开(公告)号：US20210202924A1

公开(公告)日：2021-07-01

申请号：US17024334

申请日：2020-09-17

Applicant: MAZDA MOTOR CORPORATION

Inventor： Wataru MASUDA ,  Teruhiko HANAOKA ,  Toshiki TAKAHASHI ,  Chikara KAWAMURA ,  Masanori HONDA

IPC: H01M2/10 ,  H01M10/0525 ,  H01M2/26 ,  H01M2/30

Abstract: A lithium-ion battery device comprises a housing, a battery cell stored inside the housing, and an adjacent member provided adjacently to and on a rearward side, in a vehicle longitudinal direction, of the battery cell. The battery cell comprises a cell case, an electrode body stored inside the cell case, and a pair of terminals. The cell case includes a first main face and a second main face which face to each other in the vehicle longitudinal direction. At least two gap-forming portions which respectively have a smaller area than the second main face and have a specified thickness of the vehicle longitudinal direction are arranged between the second main face and the adjacent member. The two gap-forming portions are provided to be spaced apart from each other in an inter-terminal direction of the battery cell.

公开(公告)号：US20220223927A1

公开(公告)日：2022-07-14

申请号：US17595237

申请日：2020-05-14

Applicant: Mazda Motor Corporation

Inventor： Wataru MASUDA ,  Teruhiko HANAOKA ,  Toshiki TAKAHASHI ,  Susumu MINEOI ,  Hiroyuki SAKAI ,  Hiroki FUJITA

IPC: H01M10/42 ,  H01M10/0525 ,  H01M10/0569 ,  H01M4/587 ,  H01M4/36 ,  H01M4/62

Abstract: An object of the present invention is to solve the problem of a decomposed product of cyclic ester that causes cycle deterioration and storage deterioration of a lithium ion secondary battery. As a solution for the problem, the lithium ion secondary battery includes; a positive electrode; a negative electrode using a graphite-based carbon material as a negative electrode active material; an electrolyte in which lithium salt is dissolved in a nonaqueous solvent containing cyclic ester; and either a barrier layer 15 configured to inhibit contact of the cyclic ester with the negative electrode or a capturing material configured to trap a decomposed product of the cyclic ester generated at the negative electrode.