公开(公告)号：US09778321B2

公开(公告)日：2017-10-03

申请号：US14556698

申请日：2014-12-01

Applicant: MAKITA CORPORATION

Inventor： Takuya Umemura ,  Tadahiko Kobayakawa ,  Hiroki Uesugi ,  Hiroshi Hanai

IPC: H02J7/00 ,  H02J7/04 ,  H02J7/16 ,  G01R31/36 ,  H01M10/44 ,  H01M10/48 ,  H01M10/0525

CPC classification number: G01R31/3606 ,  H01M10/0525 ,  H01M10/443 ,  H01M10/48 ,  H01M10/486 ,  H02J7/0031 ,  H02J7/0052 ,  H02J7/007 ,  H02J7/008 ,  H02J7/0091

Abstract: A charge control device includes a voltage detector that detects a voltage of a battery, a temperature detector that detects a battery temperature, a voltage setting unit that sets at least one of a charge completion voltage and an abnormality determination voltage to a high temperature time voltage that is lower than a normal voltage when the battery temperature detected by the temperature detector is or is above a high temperature determination threshold set in advance, and a charging current limiting unit that reduces a charging current a charger supplies to the battery when the battery temperature is in a temperature range between a set temperature that is lower by a predetermined temperature than the high temperature determination threshold and the high temperature determination threshold and the battery voltage detected by the voltage detector is in a voltage range between the normal voltage and the high temperature time voltage.

公开(公告)号：US09341681B2

公开(公告)日：2016-05-17

申请号：US14228850

申请日：2014-03-28

Applicant: MAKITA CORPORATION

Inventor： Tadahiko Kobayakawa ,  Hitoshi Suzuki ,  Masaaki Fukumoto

IPC: G01R31/36 ,  H01M10/48 ,  H01M10/42 ,  H01M10/44 ,  H02J7/00 ,  G01R19/12

CPC classification number: G01R31/3624 ,  G01R19/12 ,  H01M10/4257 ,  H01M10/441 ,  H01M10/48 ,  H01M10/482 ,  H01M10/486 ,  H01M2010/4278 ,  H02J7/0047

Abstract: An electrical device system having a battery pack, an electrical device, and a charging device, includes: a current detecting unit that detects a battery current flowing through the battery during a charge to or a discharge from the battery; a battery state detecting unit that detects at least one of a battery voltage and a temperature of a heat generating unit; and a determining unit that estimates an amount of change in at least one of the battery voltage and the temperature of the heat generating unit, based on the battery current, and calculates an amount of actual change in at least one of the battery voltage and the temperature of the heat generating unit, wherein the determining unit determines that the current detecting unit is abnormal, when the difference between the calculated amount of actual change and the estimated amount of change is a default value or more.

Abstract translation: 一种具有电池组，电气装置和充电装置的电气装置系统，包括：电流检测单元，其在从电池充电到电池或从电池放电期间检测流过电池的电池电流; 电池状态检测单元，其检测发电单元的电池电压和温度中的至少一个; 以及确定单元，其基于所述电池电流来估计所述电池电压和所述发热单元的温度中的至少一个的变化量，并且计算所述电池电压和所述电池电压中的至少一个的实际变化量 当所述计算出的实际变化量与所述估计变化量之间的差为默认值以上时，所述确定单元判定所述电流检测单元异常。