公开(公告)号：US20160190831A1

公开(公告)日：2016-06-30

申请号：US14972967

申请日：2015-12-17

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Shinichiro MORI ,  Junichi KIKUCHI ,  Koji TAMARU

IPC: H02J7/00 ,  B60L11/18

CPC classification number: B60L11/1809 ,  B60L53/00 ,  H02J7/0081

Abstract: A voltage control method for a secondary battery includes: calculating a voltage difference between a first voltage value as an initial voltage of the secondary battery and a second voltage value as a voltage of the secondary battery after being charged by constant-current charging during a predetermined time period; calculating an internal resistance of the secondary battery based on the voltage difference and a value of constant current applied in the constant-current charging; calculating an additional voltage based on the internal resistance and a value of constant current applied during voltage control, and calculating a target voltage by adding the additional voltage to a predetermined required voltage; controlling the voltage by charging the secondary battery with constant current until the target voltage is reached; and determining that the secondary battery is defective when the target voltage is not reached within a predetermined permissible time period while the voltage is controlled.

Abstract translation: 一种用于二次电池的电压控制方法包括：计算作为二次电池的初始电压的第一电压值和作为二次电池的电压的第二电压值之间的电压差，该电压值在预定的 时间段; 基于在恒定电流充电中施加的电压差和恒定电流的值来计算二次电池的内部电阻; 基于所述内部电阻和在电压控制期间施加的恒定电流的值来计算附加电压，以及通过将所述附加电压加到预定的所需电压来计算目标电压; 通过以恒定电流对二次电池充电直到目标电压达到来控制电压; 以及当控制所述电压时在预定的允许时间段内没有达到所述目标电压时，确定所述二次电池是有缺陷的。

公开(公告)号：US20210231522A1

公开(公告)日：2021-07-29

申请号：US17140180

申请日：2021-01-04

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Koji TAMARU

IPC: G01M3/36 ,  G01M3/32 ,  H01M50/569

Abstract: A case airtightness evaluation method evaluates airtightness of a case mounted at a vehicle. A pressure measuring step of the evaluation method includes pressurizing or depressurizing air in the case, allowing pressure in the case to stabilize, and then measuring a pressure change in the case. During the measurement of the pressure change, a deformation amount acquiring step acquires a deformation amount of a specific location of the case. Based on the acquired deformation amount, a correcting step corrects the measured pressure change. Based on the corrected pressure change, an evaluating step evaluates airtightness of the case.

公开(公告)号：US20180294465A1

公开(公告)日：2018-10-11

申请号：US15946997

申请日：2018-04-06

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Hiroki NAGAI ,  Koji TAMARU ,  Ryo KAGAMI ,  Yuki OKAMOTO

IPC: H01M2/20 ,  H01M2/30 ,  H01M10/42 ,  H01M2/10 ,  H01M10/0525 ,  H01M2/26

CPC classification number: H01M2/206 ,  H01M2/1077 ,  H01M2/266 ,  H01M2/30 ,  H01M10/0525 ,  H01M10/4207 ,  H01M2220/20 ,  Y02E60/122 ,  Y02T10/7011

Abstract: The battery pack disclosed herein includes a plurality of unit cells. The plurality of unit cells is connected to each other by a bus bar. The bus bar has two terminal connection portions and a linking portion. A linear welded portion is formed in a portion where the terminal connection portions and the external terminals overlap with each other. The linear welded portion is non-annular in the plane of the terminal connection portions and has a straight linear portion extending in a direction orthogonal to the arrangement direction, and two circular arc portions that extend from respective ends of the straight linear portion and are curved toward a side opposite to the side where the linking portion is located.

公开(公告)号：US20180277818A1

公开(公告)日：2018-09-27

申请号：US15924493

申请日：2018-03-19

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Hiroki NAGAI ,  Koji TAMARU ,  Ryo KAGAMI ,  Yuki OKAMOTO

IPC: H01M2/20

CPC classification number: H01M2/206 ,  H01M2220/20

Abstract: The present invention provides a battery pack that has a plurality of single cells arranged in an array direction, and a bus bar that electrically connects the plurality of single cells. The bus bar has a first bent portion that is bent in a direction away from each of the single cells, and a second bent portion that is bent in a direction opposite to the direction in which the first bent portion is bent. The first bent portion and the second bent portion are disposed side by side in the array direction, and extend from one end of the bus bar to the other end of the same so as to intersect with the array direction. The first bent portion is configured to expand gradually from the one end of the bus bar to the other end of the same. The second bent portion is configured to narrow gradually from the one end of the bus bar to the other end of the same.