PRIMEARTH EV ENERGY CO., LTD.
|PRIMEARTH EV ENERGY CO., LTD. Patent applications|
|Patent application number||Title||Published|
|20140218042||BATTERY STATE DETECTION DEVICE - This device and method use the complex impedance of a rechargeable battery to detect the state of the rechargeable battery. A computer determines the slope of the complex impedance at least two different frequencies in a diffusion region of the rechargeable battery when a straight-line approximation has been made, and compares the slope with a threshold value. If the slope is greater than or equal to the threshold value, the computer determines that the battery has a normal capacity balance, and if the slope is less than the threshold value, the computer determines that the battery has an abnormal unbalanced capacity. Furthermore, if the magnitude of an imaginary axis component of the complex impedance in the diffusion region of the rechargeable battery is greater than the threshold battery, the computer determines that the battery has an abnormal capacity balance, and if said magnitude is less than or equal to the threshold value, the computer determines that the battery has a normal capacity balance.||08-07-2014|
|20140205906||ALKALINE STORAGE BATTERY CATHODE, METHOD FOR MANUFACTURING ALKALINE STORAGE BATTERY CATHODE, ALKALINE STORAGE BATTERY, METHOD FOR MANUFACTURING ALKALINE STORAGE BATTERY, ALKALINE STORAGE BATTERY CATHODE ACTIVE MATERIAL, AND METHOD FOR MANUFACTURING ALKALINE STORAGE BATTERY CATHODE ACTIVE MATERIAL - This alkaline storage battery cathode is provided with: nickel hydroxide particles covered by a cobalt-compound coating layer; a zinc compound; and an yttrium compound and/or an ytterbium compound. The zinc compound and the yttrium compound and/or ytterbium compound are blended at a blend ratio that is in accordance with the ratio of the capacity characteristics of the alkaline storage battery and the output characteristics of the alkaline storage battery.||07-24-2014|
|20140106187||SEALED BATTERY AND SAFETY VALVE - 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.||04-17-2014|
|20140004424||ALKALINE STORAGE CELL AND METHOD FOR MANUFACTURING ALKALINE STORAGE CELL||01-02-2014|
|20130285667||VOLTAGE DETECTION CIRCUIT - A voltage detection circuit for a secondary battery. A secondary battery is composed of a plurality of battery blocks (B||10-31-2013|
|20120086176||SEAL STRUCTURE USING GASKET - 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.||04-12-2012|
|20110239445||METHOD FOR REUSING SECONDARY BATTERY - 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.||10-06-2011|
|20110156713||APPARATUS FOR CALCULATING POLARIZATION VOLTAGE OF SECONDARY BATTERY AND APPARATUS FOR ESTIMATING STATE OF CHARGE OF THE SAME - 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.||06-30-2011|
|20110080138||BATTERY PACK MANAGER - 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.||04-07-2011|
Patent applications by PRIMEARTH EV ENERGY CO., LTD.