Patents Assigned to PRIMEARTH EV ENERGY CO., LTD.
  • Patent number: 8765300
    Abstract: Provided is a method of manufacturing a battery having an electrode module including: a positive plate having a cathode collector portion formed by attaching a lead member to a cathode substrate made of a foamed metal plate; and a cathode collector plate welded to the cathode collector portion. The method includes: a pre-welding positive plate forming process of forming a pre-welding positive plate, which is the positive plate before welding, such that the pre-welding positive plate has a projection projecting from a pre-welding cathode collector portion, which is the cathode collector portion before welding; and a welding process of melting a pre-welding cathode collector plate to weld it to the projection. In the pre-welding positive plate forming process, the projection is formed into such a shape that the condition that S?1.3W is satisfied, where W and S represent the width and the circumferential length of the projection, respectively.
    Type: Grant
    Filed: August 25, 2011
    Date of Patent: July 1, 2014
    Assignees: Toyota Jidosha Kabushiki Kaisha, Primearth EV Energy Co., Ltd.
    Inventors: Hideo Nakamura, Yoshinori Shibata, Toru Sugiyama, Takahiro Kuhara, Yoshinori Nishio, Takeshi Kotani, Satoshi Yoneyama
  • Publication number: 20140106187
    Abstract: A sealed battery includes a return type safety valve. An annular projection that projects toward a valve body from a valve port is formed on a valve seat for the safety valve. The projection includes a first projection region and a second projection region that are defined by a shape of a tip of the projection and arranged in parallel in a circumferential direction of the valve port. The first projection region and second projection region have different curvature radii in a cross-section of the projection taken along an axial direction of the valve body. The pressure per unit area applied to the second projection region by the valve body is higher than the pressure per unit area applied to the first projection region by the valve body.
    Type: Application
    Filed: May 30, 2012
    Publication date: April 17, 2014
    Applicant: PRIMEARTH EV ENERGY CO., LTD.
    Inventors: Kyouei Miura, Shigeru Matsumoto, Shinji Hamada
  • Publication number: 20140004424
    Abstract: An alkaline storage cell comprises a positive electrode including a cobalt additive and nickel hydroxide particles that have been covered by a cobalt compound film layer, and a negative electrode including a hydrogen-absorbing alloy that contains nickel and cobalt. The positive electrode has a capacitance V, the negative electrode has a capacitance W, the cobalt additive is cobalt metal or a cobalt compound, the positive electrode contains X mass % of the cobalt additive, the cobalt is included by Y mass % in the hydrogen-absorbing alloy, and X, Y, V, and W satisfy the relationship 1.1?(X/Y)×(W/V)?1.91.
    Type: Application
    Filed: May 30, 2012
    Publication date: January 2, 2014
    Applicant: PRIMEARTH EV ENERGY CO., LTD.
    Inventors: Yuuki Sakitou, Hiroyuki Sakamoto
  • Publication number: 20130285667
    Abstract: A voltage detection circuit for a secondary battery. A secondary battery is composed of a plurality of battery blocks (B1) to (B3), and is connected to a flying capacitor (C1) via input side sampling switches (SW1) to (SW3). The flying capacitor (C1) is connected to a differential amplifier circuit (10) via output side sampling switches (SWa) and (SWb). A feedback capacitor (C2) is connected to an inverting input terminal of the differential amplifier circuit (10) to form an integrator circuit, which reduces the capacitance of the flying capacitor (C1).
    Type: Application
    Filed: September 22, 2011
    Publication date: October 31, 2013
    Applicant: PRIMEARTH EV ENERGY CO., LTD.
    Inventors: Yuusuke Koduka, Mitsuhiro Kamo, Tsuyoshi Miyahara
  • Patent number: 8432132
    Abstract: A manager that lessens a difference in state of charge of a battery pack. The battery pack is constituted of a plurality of blocks. A slave unit is provided for each of the blocks, to thus detect a terminal voltage of the block and supply the detected terminal voltage to a master unit. A difference arises in state of charge among the blocks for reasons of a difference in current consumption of the respective slave units. The master unit makes up an operation clock signal for each of the slave units from a high frequency signal and a low frequency signal. A difference in state of charge among the blocks is lessened by controlling an appearance ratio of the high frequency signal to the low frequency signal for each of the slave units.
    Type: Grant
    Filed: September 29, 2010
    Date of Patent: April 30, 2013
    Assignee: Primearth EV Energy Co., Ltd.
    Inventor: Toshiaki Nakanishi
  • Patent number: 8415954
    Abstract: There is provided an apparatus that calculates a polarization voltage of a secondary battery. A temperature sensor detects a temperature of the secondary battery; a voltage sensor detects a voltage of the secondary battery; and a current sensor detects an electric current of the secondary battery. A battery ECU calculates a polarization voltage based on the electric current and adaptively sets an upper limit value and a lower limit value of the polarization voltage according to a temperature characteristic of the secondary battery. The calculated polarization voltage is compared with an upper limit value and a lower limit value, whereby the polarization voltage is corrected. An SOC is estimated based on the corrected polarization voltage.
    Type: Grant
    Filed: November 29, 2010
    Date of Patent: April 9, 2013
    Assignee: Primearth EV Energy Co., Ltd.
    Inventors: Naoshi Akamine, Kimiaki Ishidu
  • Publication number: 20120086176
    Abstract: A gasket arranged between two sealed subject surfaces includes a plurality of segments. A recess is arranged in one of the two sealed subject surfaces at a portion corresponding to a clearance between adjacent segments. A seal is filled in the recess and deformed in accordance with the shape of the clearance between the segments.
    Type: Application
    Filed: September 23, 2011
    Publication date: April 12, 2012
    Applicant: PRIMEARTH EV ENERGY CO., LTD.
    Inventors: Hiroya KONDOU, Kenji FUKUMOTO, Hiroki TADAUCHI, Shuhei MARUKAWA
  • Publication number: 20110239445
    Abstract: A method for reusing a secondary battery by reusing unit cells or battery modules constituting reclaimed assembled batteries (or battery packs) to reconstruct a new assembled battery is disclosed. Assembled batteries are reclaimed, and disassembled into battery modules. The battery modules are selected based on battery characteristics such as an open-circuit voltage (OCV) and the like using an absolute acceptable range and a relative acceptable range, and a new assembled battery is rebuilt. The relative acceptable range is an acceptable range which is set for each assembled battery, and is set to have its center at an average value of a battery characteristic distribution.
    Type: Application
    Filed: March 29, 2011
    Publication date: October 6, 2011
    Applicant: PRIMEARTH EV ENERGY CO., LTD.
    Inventors: Yuuichi Ibi, Kunio Kanamaru, Masahiro Iwamoto, Yasushi Matsukawa, Atsushi Ootaguro
  • Publication number: 20110156713
    Abstract: There is provided an apparatus that calculates a polarization voltage of a secondary battery. A temperature sensor detects a temperature of the secondary batter; a voltage sensor detects a voltage of the secondary battery; and a current sensor detect an electric current of the secondary battery. A battery ECU calculates a polarization voltage based on the electric current and adaptively sets an upper limit value and a lower limit value of the polarization voltage according to a temperature characteristic of the secondary battery. The calculated polarization voltage is compared with an upper limit value and a lower limit value, whereby the polarization voltage is corrected. An SOC is estimated based on the corrected polarization voltage.
    Type: Application
    Filed: November 29, 2010
    Publication date: June 30, 2011
    Applicant: PRIMEARTH EV ENERGY CO., LTD.
    Inventors: Naoshi Akamine, Kimiaki Ishidu
  • Publication number: 20110080138
    Abstract: A manager that lessens a difference in state of charge of a battery pack. The battery pack is constituted of a plurality of blocks. A slave unit is provided for each of the blocks, to thus detect a terminal voltage of the block and supply the detected terminal voltage to a master unit. A difference arises in state of charge among the blocks for reasons of a difference in current consumption of the respective slave units. The master unit makes up an operation clock signal for each of the slave units from a high frequency signal and a low frequency signal. A difference in state of charge among the blocks is lessened by controlling an appearance ratio of the high frequency signal to the low frequency signal for each of the slave units.
    Type: Application
    Filed: September 29, 2010
    Publication date: April 7, 2011
    Applicant: PRIMEARTH EV ENERGY CO., LTD.
    Inventor: Toshiaki Nakanishi