Patents by Inventor Chikara Kikkawa
Chikara Kikkawa has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 10511066Abstract: A battery pack cooling system includes a plurality of cells disposed in an internal space of a battery pack case so as to form a cooling passage configured to cool the cell modules by cooling air flowing in the cooling passage. The cooling passage includes a cooling air inlet passage, a cooling air exhaust passage, and a plurality of cooling branch passages disposed to connect the cooling air inlet passage and the cooling air exhaust passage in parallel. A minimum temperature sensor is disposed in the upstream position to measure a lowest temperature region in a first cell module. A maximum temperature sensor is disposed in the downstream position which becomes a highest temperature region in the first cell module. Another temperature sensor is disposed in a second cell module to measure the temperature of either the highest temperature or the lowest temperature in the second cell module.Type: GrantFiled: February 7, 2019Date of Patent: December 17, 2019Assignee: Nissan Motor Co., Ltd.Inventors: Toyoki Iguchi, Hiroaki Hashimoto, Masayoshi Saeki, Hiroaki Saitou, Shigeyuki Kiyota, Yoshiyuki Tanaka, Hiroshi Iwata, Hiroshi Hoshi, Akira Kotaki, Nayuta Yamachi, Toshiyuki Yoshida, Chikara Kikkawa, Takeshi Haga
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Publication number: 20190173135Abstract: A battery pack cooling system includes a plurality of cells disposed in an internal space of a battery pack case so as to form a cooling passage configured to cool the cell modules by cooling air flowing in the cooling passage. The cooling passage includes a cooling air inlet passage, a cooling air exhaust passage, and a plurality of cooling branch passages disposed to connect the cooling air inlet passage and the cooling air exhaust passage in parallel. A minimum temperature sensor is disposed in the upstream position to measure a lowest temperature region in a first cell module. A maximum temperature sensor is disposed in the downstream position which becomes a highest temperature region in the first cell module. Another temperature sensor is disposed in a second cell module to measure the temperature of either the highest temperature or the lowest temperature in the second cell module.Type: ApplicationFiled: February 7, 2019Publication date: June 6, 2019Inventors: Toyoki IGUCHI, Hiroaki HASHIMOTO, Masayoshi SAEKI, Hiroaki SAITOU, Shigeyuki KIYOTA, Yoshiyuki TANAKA, Hiroshi IWATA, Hiroshi HOSHI, Akira KOTAKI, Nayuta YAMACHI, Toshiyuki YOSHIDA, Chikara KIKKAWA, Takeshi HAGA
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Patent number: 10249913Abstract: A battery pack cooling system includes a plurality of cells disposed in an internal space of a battery pack case so as to form a cooling passage configured to cool the cell modules by cooling air flowing in the cooling passage. A first temperature sensor is a minimum temperature sensor disposed in the upstream position which becomes a lowest temperature. A second temperature sensor is a maximum temperature sensor disposed in the downstream position which becomes a highest temperature. A third temperature sensor is configured to measure the temperature of either the highest temperature or the lowest temperature disposed in a second cell module. A cooling passage includes a cooling air inlet passage, a cooling air exhaust passage, and a plurality of cooling branch passages disposed to connect the cooling air inlet passage and the cooling air exhaust passage in parallel.Type: GrantFiled: July 24, 2014Date of Patent: April 2, 2019Assignee: Nissan Motor Co., Ltd.Inventors: Toyoki Iguchi, Hiroaki Hashimoto, Masayoshi Saeki, Hiroaki Saitou, Shigeyuki Kiyota, Yoshiyuki Tanaka, Hiroshi Iwata, Hiroshi Hoshi, Akira Kotaki, Nayuta Yamachi, Toshiyuki Yoshida, Chikara Kikkawa, Takeshi Haga
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Patent number: 10020474Abstract: A cell block includes holding sections that hold a battery cell arrayed body of a lower layer between a lower holding frame member and a middle holding frame member, hold a battery cell arrayed body of an upper layer between the middle holding frame member and an upper holding frame member, and hold the battery cell arrayed body of the upper layer and the battery cell arrayed body of the lower layer in a state displaced from each other in the row direction. Lower fastening sections are disposed at positions below a battery cell and projects in the row direction beyond the battery cell arrayed body of the lower layer, and join the lower holding frame member and the middle holding frame member with each other by fastening.Type: GrantFiled: April 12, 2011Date of Patent: July 10, 2018Assignee: HITACHI AUTOMOTIVE SYSTEMS, LTD.Inventors: Hiroshi Hoshi, Tsunemi Aiba, Naoki Kojima, Chikara Kikkawa, Toshiyuki Yoshida
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Patent number: 9893333Abstract: Provided are a battery block and a secondary battery module capable of holding a plurality of battery cells stably and so reducing a load applied to a welding part of a conductive member that is connected to an electrode by welding or the like. The battery block includes a lower holding frame and a middle holding frame, one of which includes two protrusions that are in contact with an outer peripheral face of each battery cell and the other includes a pressing part that presses the outer peripheral face of the battery cell inwardly in the radial direction. Then, one of an upper holding frame and the middle holding frame includes two protrusions that are in contact with an outer peripheral face of each battery cell and the other includes a pressing part that presses the outer peripheral face of the battery cell inwardly in the radial direction.Type: GrantFiled: April 10, 2013Date of Patent: February 13, 2018Assignees: HITACHI AUTOMOTIVE SYSTEMS, LTD., NISSAN MOTOR CO., LTD.Inventors: Hiroshi Hoshi, Tsunemi Aiba, Naoki Kojima, Chikara Kikkawa, Toshiyuki Yoshida, Shigeyuki Kiyota, Yoshiyuki Tanaka, Toyoki Iguchi, Hiroaki Saitou
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Patent number: 9812683Abstract: The purpose of the present invention is to provide a battery block capable of reducing stress acting on a connection portion due to thermal expansion/contraction or size error. A battery block (40) according to the present invention includes: a plurality of conductive members (191) arranged along side surfaces (114) of a holding case (111) and electrically connecting corresponding battery cells (101); voltage detection boards (201, 202) disposed opposite the side surfaces (114) of the holding case (111) and detecting the voltage of the battery cells (101); and a plurality of voltage detection terminals (204) respectively electrically connected to a plurality of conductive members (192) disposed on the voltage detection boards (201, 202).Type: GrantFiled: February 18, 2013Date of Patent: November 7, 2017Assignee: Hitachi Automotive Systems, Ltd.Inventors: Tsunemi Aiba, Hiroshi Iwata, Hiroshi Hoshi, Chikara Kikkawa, Nayuta Yamachi, Takashi Kobune, Takeshi Haga
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Patent number: 9685682Abstract: A secondary battery module 1 of the present invention stores cell blocks 40 in a module case 2, and cools battery cells 101 in the cell blocks 40 by circulating coolant to the inside of the cell blocks by introduction of the coolant into the module case 2. The secondary battery module has a structure of communicating coolant circulation ports 22 that open to a case wall section 21 of the module case 2 and coolant circulation ports 62a that open to the cell blocks 40 with each other by a communication member 71, and passing wiring through a space region 80 formed outside the communication member 71 and between the case wall section 21 and the cell blocks 40. Thus, wiring can be executed without interfering flow of the coolant, and the total secondary battery module 1 can be miniaturized.Type: GrantFiled: August 31, 2011Date of Patent: June 20, 2017Assignee: Hitachi Automotive Systems, Ltd.Inventors: Hiroshi Hoshi, Tsunemi Aiba, Naoki Kojima, Chikara Kikkawa, Toshiyuki Yoshida
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Publication number: 20160204478Abstract: A battery pack cooling system includes a plurality of cells disposed in an internal space of a battery pack case so as to form a cooling passage configured to cool the cell modules by cooling air flowing in the cooling passage. A first temperature sensor is a minimum temperature sensor disposed in the upstream position which becomes a lowest temperature. A second temperature sensor is a maximum temperature sensor disposed in the downstream position which becomes a highest temperature. A third temperature sensor is configured to measure the temperature of either the highest temperature or the lowest temperature disposed in a second cell module. A cooling passage includes a cooling air inlet passage, a cooling air exhaust passage, and a plurality of cooling branch passages disposed to connect the cooling air inlet passage and the cooling air exhaust passage in parallel.Type: ApplicationFiled: July 24, 2014Publication date: July 14, 2016Applicants: NISSAN MOTOR CO., LTD., HITACHI AUTOMOTIVE SYSTEMS, LTD.Inventors: Toyoki IGUCHI, Hiroaki HASHIMOTO, Masayoshi SAEKI, Hiroaki SAITOU, Shigeyuki KIYOTA, Yoshiyuki TANAKA, Hiroshi IWATA, Hiroshi HOSHI, Akira KOTAKI, Nayuta YAMACHI, Toshiyuki YOSHIDA, Chikara KIKKAWA, Takeshi HAGA
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Publication number: 20150349390Abstract: The purpose of the present invention is to provide a battery block capable of reducing stress acting on a connection portion due to thermal expansion/contraction or size error. A battery block (40) according to the present invention includes: a plurality of conductive members (191) arranged along side surfaces (114) of a holding case (111) and electrically connecting corresponding battery cells (101); voltage detection boards (201, 202) disposed opposite the side surfaces (114) of the holding case (111) and detecting the voltage of the battery cells (101); and a plurality of voltage detection terminals (204) respectively electrically connected to a plurality of conductive members (192) disposed on the voltage detection boards (201, 202).Type: ApplicationFiled: February 28, 2013Publication date: December 3, 2015Inventors: Tsunemi AIBA, Hiroshi IWATA, Hiroshi HOSHI, Chikara KIKKAWA, Nayuta YAMACHI, Takashi KOBUNE, Takeshi HAGA
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Publication number: 20140227570Abstract: The present invention is a power storage device including a holding member holding power storage units and temperature detection sensors detecting temperatures of the power storage units held by the holding member, in which the holding member includes a facing surface portion facing coated surfaces of the power storage units held by the holding member, and through holes formed so as to pierce through the facing surface portion, each of the temperature detection sensors includes a lid unit closing the through hole by being attached to the holding member, and a sensor unit supported in the lid unit so as to be elastically deformed, which is elastically deformed when the lid unit closes the through hole, pressed and contacted onto the coated surface of the power storage unit due to reaction force of elastic deformation.Type: ApplicationFiled: May 8, 2012Publication date: August 14, 2014Applicant: HITACHI VEHICLE ENERGY, LTD.Inventors: Hiroshi Hoshi, Tsunemi Aiba, Chikara Kikkawa, Toshiyuki Yoshida
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Publication number: 20140193694Abstract: A cell block includes holding sections that hold a battery cell arrayed body of a lower layer between a lower holding frame member and a middle holding frame member, hold a battery cell arrayed body of an upper layer between the middle holding frame member and an upper holding frame member, and hold the battery cell arrayed body of the upper layer and the battery cell arrayed body of the lower layer in a state displaced from each other in the row direction. Lower fastening sections are disposed at positions below a battery cell and projects in the row direction beyond the battery cell arrayed body of the lower layer, and join the lower holding frame member and the middle holding frame member with each other by fastening.Type: ApplicationFiled: April 12, 2011Publication date: July 10, 2014Inventors: Hiroshi Hoshi, Tsunemi Aiba, Naoki Kojima, Chikara Kikkawa, Toshiyuki Yoshida
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Publication number: 20140030563Abstract: A secondary battery module 1 of the present invention stores cell blocks 40 in a module case 2, and cools battery cells 101 in the cell blocks 40 by circulating coolant to the inside of the cell blocks by introduction of the coolant into the module case 2. The secondary battery module has a structure of communicating coolant circulation ports 22 that open to a case wall section 21 of the module case 2 and coolant circulation ports 62a that open to the cell blocks 40 with each other by a communication member 71, and passing wiring through a space region 80 formed outside the communication member 71 and between the case wall section 21 and the cell blocks 40. Thus, wiring can be executed without interfering flow of the coolant, and the total secondary battery module 1 can be miniaturized.Type: ApplicationFiled: August 31, 2011Publication date: January 30, 2014Applicant: Hitachi Vehicle Energy, Ltd.Inventors: Hiroshi Hoshi, Tsunemi Aiba, Naoki Kojima, Chikara Kikkawa, Toshiyuki Yoshida
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Publication number: 20130273398Abstract: Provided are a battery block and a secondary battery module capable of holding a plurality of battery cells stably and so reducing a load applied to a welding part of a conductive member that is connected to an electrode by welding or the like. The battery block includes a lower holding frame and a middle holding frame, one of which includes two protrusions that are in contact with an outer peripheral face of each battery cell and the other includes a pressing part that presses the outer peripheral face of the battery cell inwardly in the radial direction. Then, one of an upper holding frame and the middle holding frame includes two protrusions that are in contact with an outer peripheral face of each battery cell and the other includes a pressing part that presses the outer peripheral face of the battery cell inwardly in the radial direction.Type: ApplicationFiled: April 10, 2013Publication date: October 17, 2013Applicant: Hitachi Vehicle Energy, Ltd.Inventors: Hiroshi HOSHI, Tsunemi AIBA, Naoki KOJIMA, Chikara KIKKAWA, Toshiyuki YOSHIDA
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Patent number: D685728Type: GrantFiled: July 14, 2011Date of Patent: July 9, 2013Assignee: Hitachi Vehicle Energy, LtdInventors: Hiroshi Hoshi, Tsunemi Aiba, Naoki Kojima, Chikara Kikkawa, Toshiyuki Yoshida
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Patent number: D750558Type: GrantFiled: June 14, 2013Date of Patent: March 1, 2016Assignee: HITACHI AUTOMOTIVE SYSTEMS, LTD.Inventors: Nayuta Yamachi, Eisuke Sengoku, Takashi Kobune, Chikara Kikkawa, Toshikazu Maeshima