公开(公告)号：US20150372514A1

公开(公告)日：2015-12-24

申请号：US14766031

申请日：2013-11-01

Applicant: NEC CORPORATION

Inventor： Kenji KOBAYASHI

IPC: H02J7/00

CPC classification number: H02J7/0014 ,  G01R31/3679 ,  H01M10/441 ,  H01M10/482 ,  H01M2010/4271 ,  H02J7/0021 ,  H02J7/007

Abstract: An object of the present invention is to provide a new method for performing deterioration determination of a lithium ion secondary battery. In order to attain the object, in the present invention, there is provided a electric storage device (10) including a battery unit (11) including a plurality of battery cells which are connected to each other, a charge and discharge control unit (12) controlling charge and discharge of the plurality of battery cells, a cell balance unit (13) performing balance processing which corrects a difference in a cell voltage between the plurality of battery cells, and a determination unit (14) performing deterioration determination of each of the plurality of battery cells in a state in which the balance processing is disabled when the charge and discharge based on the control of the charge and discharge control unit (12) is not performed for greater than or equal to a predetermined period of time.

Abstract translation: 本发明的目的是提供一种用于进行锂离子二次电池的劣化判定的新方法。 为了实现该目的，在本发明中，提供了一种蓄电装置（10），包括：电池单元（11），其包括彼此连接的多个电池单元;充放电控制单元（12） 控制所述多个电池单元的充电和放电的单元平衡单元，执行校正多个电池单元之间的单元电压差的平衡处理的单元平衡单元，以及执行各个电池单元的劣化判定的判定单元， 当基于充放电控制单元（12）的控制的充电和放电不被执行大于或等于预定时间段时，处于平衡处理被禁用的状态的多个电池单元。

公开(公告)号：US20160211677A1

公开(公告)日：2016-07-21

申请号：US14915119

申请日：2014-06-26

Applicant: NEC CORPORATION

Inventor： Kenji KOBAYASHI ,  Yuan LUO ,  Junichi MIYAMOTO ,  Shingo TAKAHASHI ,  Nobuhide YOSHIDA

IPC: H02J7/00

CPC classification number: H02J7/0014 ,  H02J7/0021 ,  H02J7/0026

Abstract: A power storage system (10) comprises the following: a battery unit (11) in which a plurality of battery cells are connected; an acquisition unit (12) for continuously acquiring, while the battery unit (11) is discharging, (V) which represents the extent of the discharge from the battery unit (11) and the temperature (T) of the battery unit (11) when the degree of discharge is (V); a balancing unit (13) for executing cell balancing by which the difference in the amount of charging between battery cells is reduced; and a balancing control unit (14) for controlling the balancing unit (13) so that when a reference state is detected on the basis of (V) and (T), cell balancing is not executed, in accordance with the results of the detection.

Abstract translation: 蓄电系统（10）包括：电池单元（11），其中连接有多个电池单元; 用于在电池单元（11）正在放电的同时，持续地获取表示从电池单元（11）排出的程度和电池单元（11）的温度（T）的（V）的获取单元（12） 当放电程度为（V）时; 用于执行电池平衡的平衡单元（13），通过该平衡单元减少电池单元之间的充电量的差异; 以及用于控制平衡单元（13）的平衡控制单元（14），使得当基于（V）和（T）检测到基准状态时，根据检测结果不执行单元平衡 。

公开(公告)号：US20220141993A1

公开(公告)日：2022-05-05

申请号：US17505805

申请日：2021-10-20

Applicant: NEC Corporation

Inventor： Kenji KOBAYASHI ,  Kunihiko ISHIHARA ,  Koichi TODOROKI ,  Yoshinori MIYAMOTO ,  Minoru YOSHIKAWA

IPC: H05K7/20

Abstract: A cooling apparatus includes a duct provided above a cooling target and configured to guide an air discharged after absorbing heat generated inside the cooling target to the cooling target, a cooler provided in the duct and configured to cool the air flowing in the duct, and an adjusting mechanism provided downstream of the cooler and configured to adjust the air discharged from the duct to the cooling target, and the duct receives the air discharged from one side of the cooling target and directed upward, guides the air to another side of the cooling target, and discharges the air downward on the other side, and the adjusting mechanism changes a position of an opening at a discharge port of the duct.

公开(公告)号：US20170054184A1

公开(公告)日：2017-02-23

申请号：US15305730

申请日：2015-04-15

Applicant: NEC Corporation

Inventor： Ayami TANABE ,  Kazuhisa SUNAGA ,  Osamu ISHIBASHI ,  Hiroaki FUKUNISHI ,  Kenji KOBAYASHI

IPC: H01M10/44 ,  H02J7/00 ,  H01M10/42 ,  H01M10/48 ,  H01M10/0525 ,  H01M10/46

CPC classification number: H01M10/44 ,  H01M10/0525 ,  H01M10/46 ,  H01M10/48 ,  H02J7/0063 ,  H02J7/0068 ,  H02J7/007 ,  H02J7/0093 ,  H02J2007/0067

Abstract: A lithium ion secondary battery system allowing a high power efficiency and large effective capacity is provided. The system includes an external power source for charging a lithium ion secondary battery, and a controller for switching output modes including a continuous discharge mode, in which electric power is continuously supplied from the lithium ion secondary battery to the load, and a pulsed charge and discharge mode, in which pulsed electric power is supplied from the lithium ion secondary battery to the load, and pulsed electric power is supplied from the external power source to charge the lithium ion secondary battery during a low-level pulsed discharge period(s), which are periods during which electric power is not supplied to the load, wherein the controller switches the output modes to the pulsed charge and discharge mode when the lithium ion secondary battery has a voltage lower than a predetermined upper switching voltage.

Abstract translation: 提供了具有高功率效率和大的有效容量的锂离子二次电池系统。 该系统包括用于对锂离子二次电池进行充电的外部电源，以及用于切换输出模式的控制器，所述输出模式包括连续放电模式，其中从锂离子二次电池向负载连续地供电，以及脉冲充电， 从锂离子二次电池向负载供给脉冲电力的放电模式，从外部电源供给脉冲电力，在低电平脉冲放电期间对锂离子二次电池充电， 其中电力未被提供给负载的周期，其中当锂离子二次电池具有低于预定的上部开关电压的电压时，控制器将输出模式切换到脉冲充电和放电模式。

公开(公告)号：US20170200985A1

公开(公告)日：2017-07-13

申请号：US15315664

申请日：2015-04-22

Applicant: NEC Corporation

Inventor： Hiroaki FUKUNISHI ,  Kenji KOBAYASHI ,  Suguru WATANABE ,  Osamu ISHIBASHI ,  Hiroshi KAJITANI ,  Kazuhisa SUNAGA ,  Hideyuki SUGITA ,  Atsumasa SAWADA ,  Ayami TANABE

IPC: H01M10/44 ,  H02J7/00 ,  H01M10/0525

CPC classification number: H01M10/44 ,  H01M10/0525 ,  H01M10/613 ,  H02J7/0052 ,  H02J7/0063 ,  H02J2007/0067

Abstract: A pulsed discharge device according to an exemplary aspect of the present invention includes a controller configured to determine an interruption time to a discharge time based on a predetermined time ratio between the discharge time and the interruption time when performing a pulsed discharge to repeat alternately a discharge and a pause in discharging of a chemical battery.

公开(公告)号：US20180269541A1

公开(公告)日：2018-09-20

申请号：US15542511

申请日：2016-01-15

Applicant: NEC Corporation

Inventor： Kenji KOBAYASHI ,  Masato YANO ,  Suguru WATANABE ,  Hisato SAKUMA ,  Koji KUDO

IPC: H01M10/44 ,  H01M10/42 ,  H01M10/0525 ,  H02J7/00

CPC classification number: H01M10/441 ,  H01M10/0525 ,  H01M10/425 ,  H01M10/482 ,  H01M2010/4278 ,  H01M2220/20 ,  H02J3/32 ,  H02J7/0021 ,  H02J7/0047 ,  H02J7/007 ,  H02J2007/005

Abstract: A storage cell control system configured to perform charge/discharge control for a plurality of storage cells under control based on a power adjustment request from a power system includes: a power storage capacity calculating means configured to calculate a current power storage capacity of the storage cell based on storage cell information of the storage cell; a target power storage capacity setting means configured to set a target power storage capacity in stopping an operation of the storage cell; a capacity degradation speed calculating means configured to calculate a current capacity degradation speed and a target capacity degradation speed with respect to each power storage capacity by applying the current power storage capacity and the target power storage capacity to capacity degradation speed correlation information set in advance; and a power distributing means configured to distribute power to the plurality of storage cells in such a manner that when it is assumed that t is an elapsed time from start of operation, a capacity degradation amount DSOCvaried(t) is a time integral value of a capacity degradation speed in a case where the capacity degradation speed varies according to a power storage capacity, and a capacity degradation amount DSOCfixed(t) is a time integral value of a capacity degradation speed in a case where the capacity degradation speed is fixed regardless of a power storage capacity, a capacity degradation amount minimization condition: a capacity degradation amount DSOCvaried(t)≤a capacity degradation amount DSOCfixed(t) is satisfied.

公开(公告)号：US20150369876A1

公开(公告)日：2015-12-24

申请号：US14766022

申请日：2013-11-01

Applicant: NEC Corporation

Inventor： Kenji KOBAYASHI

IPC: G01R31/36 ,  H01M10/058 ,  H01M10/04

CPC classification number: G01R31/3679 ,  G01R31/362 ,  G01R31/3658 ,  H01M10/04 ,  H01M10/0525 ,  H01M10/058 ,  H01M10/482 ,  Y10T29/49004 ,  Y10T29/49005

Abstract: An object of the present invention is to accurately perform deterioration determination of a lithium ion secondary battery. In order to attain the object, in a deterioration determination method of the present invention, first, measurement processing of charging a deterioration determination target which is a battery cell or a battery module connecting a plurality of battery cells with each other up to a predetermined voltage value, discharging, and measuring a charge voltage value (a charge voltage value after the start of the discharge) within a predetermined period of time from the start of the discharge is repeated a plurality of times. Then, a deterioration state of the deterioration determination target is determined in consideration of a change mode of the charge voltage value after the start of the discharge due to the repetition of the charge and discharge.

Abstract translation: 本发明的目的是准确地进行锂离子二次电池的劣化判定。 为了达到此目的，在本发明的劣化判定方法中，首先，将作为电池单元的劣化判定对象或连接多个电池单元的电池模块进行充电，直至达到预定电压 在从放电开始的预定时间段内，重复多次重放值，放电和测量充电电压值（放电开始后的充电电压值）。 然后，考虑到由于充电和放电的重复而在放电开始之后的充电电压值的改变模式，确定劣化判定目标的劣化状态。