Patent application number | Description | Published |
20090148762 | SEPARATOR FOR USE IN NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY AND NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY - A separator for use in a non-aqueous electrolyte secondary battery including a first porous layer (layer A) having a shutdown function which becomes substantially a non-porous layer at a high temperature, and a second porous layer (layer B) including an aramid resin and an inorganic material, wherein a ratio (T | 06-11-2009 |
20090197153 | BATTERY PACK, ELECTRONIC APPARATUS EQUIPPED WITH THE SAME AND ELECTRONIC APPARATUS EQUIPPED WITH BATTERY HOUSING PART - A battery pack including at least a battery and a casing for accommodating the battery, in which the casing has a ventilation hole communicating with the outside of the casing, and a mesh member made of metal for covering at least the ventilation hole is provided at the side surface of the casing. Preferably, the mesh member is coated with an insulating resin. | 08-06-2009 |
20090208820 | ELECTROCHEMICAL ELEMENT - To operate a safety mechanism normally even when an accident happens. For this object, an electrochemical element includes an exhaust valve that operates when an internal pressure in a casing | 08-20-2009 |
20090286148 | METHOD FOR EVALUATING INTERNAL SHORT-CIRCUIT OF BATTERY, DEVICE FOR EVALUATING INTERNAL SHORT-CIRCUIT OF BATTERY, BATTERY, BATTERY PACK AND THEIR MANUFACTURING METHODS - Methods for evaluating battery safety under internal short-circuit conditions are improved to eliminate variations in evaluation results and accurately evaluate battery safety under internal short-circuit conditions. An internal short-circuit is caused in a battery by using an internal short-circuit causing method in which battery information obtained upon the occurrence of an internal short-circuit hardly changes with the structure of the battery. At this time, the battery information is detected to accurately evaluate the safety of the battery upon the internal short-circuit and identify the safety level. | 11-19-2009 |
20100119932 | NONAQUEOUS ELECTROLYTE SECONDARY BATTERY - An object of the present invention is to provide a high-energy density nonaqueous electrolyte secondary battery that controls the rise in temperature during short circuiting. Used is a nonaqueous electrolyte secondary battery | 05-13-2010 |
20100136429 | NONAQUEOUS ELECTROLYTE SECONDARY BATTERY - A nonaqueous electrolyte secondary battery includes a positive electrode ( | 06-03-2010 |
20100209767 | METHOD FOR EVALUATING BATTERY SAFETY UNDER INTERNAL SHORT-CIRCUIT CONDITION, BATTERY AND BATTERY PACK WHOSE SAFETY IS IDENTIFIED BY INTERNAL SHORT-CIRCUIT SAFETY EVALUATION METHOD, AND METHOD FOR PRODUCING THE SAME - The invention provides a method for evaluating the safety of a battery under an internal short-circuit condition. The battery includes: an electrode group including a positive electrode, a negative electrode, and an insulating layer for electrically insulating the electrodes, which are wound or laminated; an electrolyte; a housing for housing the electrode group and the electrolyte; and a current-collecting terminal for electrically connecting the electrode group and the housing. The method of the invention includes: placing a foreign object at a location inside the electrode group of the battery where the positive electrode and the negative electrode face each other; and pressing the location by the pressure applied by a pressing tool to locally crush the insulating layer between the positive and negative electrodes, thereby causing an internal short-circuit. The contact area of the electrode group and the pressing tool during the pressing is larger than the area of a rectangle circumscribed about the foreign object. A short-circuit test is conducted at a given location inside the battery to comprehensively evaluate the safety of the battery under an internal short-circuit condition. | 08-19-2010 |
20100219795 | PULSE CHARGE METHOD FOR NONAQUEOUS ELECTROLYTE SECONDARY BATTERY AND PULSE CHARGE CONTROL DEVICE - A pulse charge method for a nonaqueous electrolyte secondary battery, includes: a charge control step of pulse charging by supplying a pulsed current periodically to the nonaqueous electrolyte secondary battery; a battery voltage detection step of measuring a battery voltage of the nonaqueous electrolyte secondary battery; a comparison step of comparing the battery voltage, measured in the battery voltage detection step when the pulsed current is supplied, with a predetermined set voltage; and a charge end control step of ending the pulse charging when a comparison result shows that the measured battery voltage is equal to or higher than the set voltage. | 09-02-2010 |
20100330404 | BATTERY HOUSING TRAY AND ASSEMBLED-BATTERY HOUSING TRAY USING THE SAME - A PTC resistor according to the present invention comprises at least one PTC composition which comprises at least one resin and at least two conductive materials. The at least two conductive materials comprises at least two conductive materials different from each other. The at least one PTC composition may comprise a first PTC composition which comprises a first resin and at least one first conductive material and a second PTC composition which is compounded with the first PTC composition and comprises a second resin and at least one second conductive material. The at least one first conductive material is at least partially different from the at least one second conductive material. One of the first resin and the second resin may comprise a reactant resin and a reactive resin which is cross-linked with the reactant resin. The PTC resistor may comprise a flame retardant agent. The PTC resistor may comprise a liquid-resistant resin. | 12-30-2010 |
20110045356 | BATTERY - In a battery in which each of a positive electrode plate | 02-24-2011 |
20110052971 | BATTERY - In a battery, an electrode group ( | 03-03-2011 |
20110068800 | INTERNAL SHORT CIRCUIT EVALUATION APPARATUS FOR BATTERY - The present invention relates to an apparatus for evaluating an internal short circuit of a battery. An object of the invention is to provide an apparatus capable of evaluating whether or not an internal short circuit has occurred in an electrode group in consideration of pressure applied to the electrode group. An internal short circuit evaluation apparatus according to one embodiment of the invention includes at least a pressure member capable of operating independently and applying pressure to at least a predetermined position of the surface of the electrode group, and a short-circuiting member that is pressed into the predetermined position. An internal short circuit evaluation apparatus according to another embodiment of the invention includes a pressure member having an integrated short-circuiting member. | 03-24-2011 |
20120107674 | SECONDARY BATTERY HAVING ANTI-SCATTERING MECHANISM - A housing for containing electrode assemblies and an electrolyte includes a cover | 05-03-2012 |
20140375279 | LITHIUM ION BATTERY CHARGING METHOD AND BATTERY-EQUIPPED DEVICE - In a charging method for a lithium ion battery, constant current charging of the lithium ion battery is performed. The constant current charging includes at least three consecutive charging stages. The at least three consecutive charging stages include consecutive first, second, and third charging stages. The second charging stage has a set current value which is set lower than set current values of the first and third charging stages. | 12-25-2014 |