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1
US20050208370A1
Publication/Patent Number: US20050208370A1
Publication date: 2005-09-22
Application number: 10/803,641
Filing date: 2004-03-18
Abstract: A battery having a nanostructured battery electrode is disclosed wherein it is possible to reverse the contact of the electrolyte with the battery electrode and, thus, to return a battery to a reserve state after it has been used to generate current. In order to achieve this reversibility, the nanostructures on the battery electrode comprise a plurality of closed cells and the pressure within the enclosed cells is varied. In a first embodiment, the pressure is varied by varying the temperature of a fluid within the cells by, for example, applying a voltage to electrodes disposed within said cells. In a second illustrative embodiment, once the battery has been fully discharged, the battery is recharged and then the electrolyte fluid is expelled from the cells in a way such that it is no longer in contact with the battery electrode. A battery having a nanostructured battery electrode is disclosed wherein it is possible to reverse the contact of the electrolyte with the battery electrode and, thus, to return a battery to a reserve state after it has been used to generate current. In order to achieve this ...more ...less
2
US20050170240A1
Publication/Patent Number: US20050170240A1
Publication date: 2005-08-04
Application number: 11/043,353
Filing date: 2005-01-26
Abstract: In an exemplary embodiment of the present invention, an electrochemical store comprises a plurality of heat exchange units and a plurality of electrochemical storage cells arranged in an array, alongside one another, and between pairs of the heat exchange unit. The heat exchange units include heat exchange channels for flow of a temperature control fluid. A forward flow distribution channel is coupled to the heat exchange channels for ingress of the temperature control fluid and a return flow distribution channel is coupled to the heat exchange channels for egress of the temperature control fluid flow. Pursuant to a feature of the present invention, a pressure-tight and watertight battery box is arranged to receive and enclose the heat exchange units and the electrochemical storage cells, and the battery box is arranged and configured to mount a water outlet and venting device. In an exemplary embodiment of the present invention, an electrochemical store comprises a plurality of heat exchange units and a plurality of electrochemical storage cells arranged in an array, alongside one another, and between pairs of the heat exchange unit. The heat exchange ...more ...less
3
US20050277018A1
Publication/Patent Number: US20050277018A1
Publication date: 2005-12-15
Application number: 11/137,136
Filing date: 2005-05-24
Inventor: Kim, Cheon  
Assignee: Kim, Cheon
Abstract: An electrode assembly for a secondary battery comprising an adiabatic plate attached to the negative electrode plate is disclosed. The electrode assembly comprises a positive electrode plate having a positive electrode collector, a positive electrode coating, and a non-coated area on the positive electrode collector. The negative electrode plate has a negative electrode collector, a negative electrode coating, and a non-coated area on the negative electrode collector. A separator insulates the positive and negative electrode plates. Positive and negative electrode tabs are attached to the non-coated areas of the positive and negative electrode collectors. The negative electrode plate has an adiabatic plate attached to the surface of a non-coated area of the negative electrode collector that is opposite the surface to which the negative electrode tab is attached. This construction improves battery stability and prevents short circuits caused either by heat generated during overcharging or by an internal short circuit. An electrode assembly for a secondary battery comprising an adiabatic plate attached to the negative electrode plate is disclosed. The electrode assembly comprises a positive electrode plate having a positive electrode collector, a positive electrode coating, and a non-coated ...more ...less
4
US20050089750A1
Publication/Patent Number: US20050089750A1
Publication date: 2005-04-28
Application number: 10/502,443
Filing date: 2002-12-19
Abstract: An apparatus and method provides cooling for electrochemical cells of an energy storage device. A number of electrochemical cells are arranged in a spaced apart relationship, each having opposing first and second planar surfaces and being subject to volumetric changes during charge and discharge cycling. A cooling bladder provides temperature control for the energy storage device. The cooling bladder is formed of a conformable thermally conducting material and includes inlet and outlet ports. The cooling bladder conforms to maintain contact with at least the first planar surface or the second planar surface of each cell during volumetric changes of the cells. A heat transfer medium passes between the inlet and outlet ports of the cooling bladder to control an operating temperature of the cells. The cooling bladder can be pressurized to maintain the cells of the energy storage device in a state of compression during charge and discharge cycling. An apparatus and method provides cooling for electrochemical cells of an energy storage device. A number of electrochemical cells are arranged in a spaced apart relationship, each having opposing first and second planar surfaces and being subject to volumetric changes during ...more ...less
5
US20050053829A1
Publication/Patent Number: US20050053829A1
Publication date: 2005-03-10
Application number: 10/923,749
Filing date: 2004-08-24
Inventor: Han, Kyu-nam  
Assignee: Han, Kyu-Nam
Abstract: A battery pack includes a case having an inner space, a plurality of battery cells placed inside the case, and at least one spacer placed between the battery cells. A space is formed around a supporting portion of the spacer for the battery cells so as to allow heat generated by the battery cells to flow out of the case. The spacer supports the battery cells by line contact therewith. The spacer body is formed in the shape of an H beam or in the shape of a staircase. A battery pack includes a case having an inner space, a plurality of battery cells placed inside the case, and at least one spacer placed between the battery cells. A space is formed around a supporting portion of the spacer for the battery cells so as to allow heat generated by ...more ...less
6
US20050221165A1
Publication/Patent Number: US20050221165A1
Publication date: 2005-10-06
Application number: 10/524,145
Filing date: 2003-07-08
Abstract: The present invention relates to electrical separators for batteries, especially lithium batteries, having a shutdown mechanism and also a process for their production. An electrical separator is a separator which is used in batteries and other systems in which electrodes have to be separated from each other while maintaining ion conductivity for example. Safety is very important in lithium batteries, since in contrast to other types of battery (Pb, NiCd, NiMeH) the solvent for the electrolyte is not water but a combustible solvent, for example organic carbonates. This is why it is absolutely necessary for a separator for lithium cells to possess a suitable shutdown mechanism and at the same time for it not to be able to melt down. This object is achieved by an electrical separator according to the invention that comprises a shutdown layer which consists of particles which melt at a desired temperature, close the pores of the separator and so stop ion flow. Since the separator also comprises a porous inorganic (ceramic) layer on a carrier, the cells cannot melt down as a result of a completely melted separator. The present invention relates to electrical separators for batteries, especially lithium batteries, having a shutdown mechanism and also a process for their production. An electrical separator is a separator which is used in batteries and other systems in which electrodes have ...more ...less
7
US20050266302A1
Publication/Patent Number: US20050266302A1
Publication date: 2005-12-01
Application number: 11/139,050
Filing date: 2005-05-27
Inventor: Kim, Jun  
Assignee: Kim, Jun
Abstract: A secondary battery having an improved electrical connection structure of a secondary protective device by positioning a thermo-breaker in a protective device groove, in order to improve the stability of the secondary battery while minimizing the occupation of the inner space of the can. The secondary battery includes an electrode assembly having positive and negative electrode tabs. A can contains the electrode assembly therein. A cap assembly has an insulated electrode terminal and a cap plate for sealing the top opening of the can. A protective device groove is formed on the bottom surface of the cap plate. A thermo-breaker is seated in the protective device groove while being connected between the first electrode tab and the electrode terminal. When the temperature inside the battery reaches a predetermined value, the bimetal loses contact and the electrical current inside the battery is interrupted, avoiding overcharge/over-discharge or explosion of the battery. A secondary battery having an improved electrical connection structure of a secondary protective device by positioning a thermo-breaker in a protective device groove, in order to improve the stability of the secondary battery while minimizing the occupation of the inner space of ...more ...less
8
US20050282065A1
Publication/Patent Number: US20050282065A1
Publication date: 2005-12-22
Application number: 11/126,219
Filing date: 2005-05-11
Inventor: Kubo, Asami  
Abstract: In a generator control apparatus for a vehicle, the control apparatus includes an engine; an intake air temperature sensing section configured to sense a temperature of intake air of the engine; an engine startup temperature-state determining section configured to determine whether the engine is in warm-up state, at the time of startup of the engine; a battery; a battery liquid temperature estimating section configured to estimate a liquid temperature of the battery; a battery liquid temperature storing section configured to store the battery liquid temperature estimated by the battery liquid temperature estimating section; and a generator configured to charge the battery in accordance with the estimated battery liquid temperature. Moreover, in this control apparatus, the battery liquid temperature estimating section is configured to estimate, at the time of engine startup in warm-up state, the battery liquid temperature to be the lower one of the sensed intake air temperature and a battery liquid temperature previously stored by the battery liquid temperature storing section, by comparing the sensed intake air temperature with the previously stored battery liquid temperature. In a generator control apparatus for a vehicle, the control apparatus includes an engine; an intake air temperature sensing section configured to sense a temperature of intake air of the engine; an engine startup temperature-state determining section configured to determine ...more ...less
9
US20050058892A1
Publication/Patent Number: US20050058892A1
Publication date: 2005-03-17
Application number: 10/937,023
Filing date: 2004-09-09
Abstract: Mechanically and thermally improved rechargeable batteries, modules and fluid-cooled battery pack systems. The battery is prismatic in shape with an optimized thickness to width to height aspect ratio which provides the battery with balanced optimal properties when compared with prismatic batteries lacking this optimized aspect ratio. The optimized thickness, width and height allow for maximum capacity and power output, while eliminating deleterious side affects. The battery case design allows for unidirectional expansion which is readily compensated for by applying external mechanical compression counter to that direction. In the module, the batteries are bound within a module bundling/compression means under external mechanical compression which is optimized to balance outward pressure due to expansion and provide additional inward compression to reduce the distance between the positive and negative electrodes, thereby increasing overall battery power. The fluid-cooled battery pack includes; 1) a battery-pack case having coolant inlet and outlet; 2) battery modules within the case such that the battery module is spaced from the case walls and from other battery modules to form coolant flow channels along at least one surface of the bundled batteries; and 3) at least one coolant transport means. The width of the coolant flow channels allows for maximum heat transfer. Finally the batteries, modules and packs can also include means for providing variable thermal insulation to at least that portion of the rechargeable battery system which is most directly exposed to said ambient thermal condition, so as to maintain the temperature of the rechargeable battery system within the desired operating range thereof under variable ambient conditions. Mechanically and thermally improved rechargeable batteries, modules and fluid-cooled battery pack systems. The battery is prismatic in shape with an optimized thickness to width to height aspect ratio which provides the battery with balanced optimal properties when compared with ...more ...less
10
US20050064278A1
Publication/Patent Number: US20050064278A1
Publication date: 2005-03-24
Application number: 10/666,089
Filing date: 2003-09-19
Abstract: A method of starting a nickel metal hydride battery in cold weather. The method includes the step of discharging the battery through a short circuit.
11
US20050074666A1
Publication/Patent Number: US20050074666A1
Publication date: 2005-04-07
Application number: 10/630,851
Filing date: 2003-07-31
Abstract: The heat control device for a battery of the present invention contains i) a radiator for dissipating heat that has generated in a battery through a charging and discharging process; and ii) a heat controller that transforms its shape by heat. The structure can protect a battery from anomalous overheating. On the other hand, when the temperature of the battery falls down, the device protects the battery not only from over-dissipating, but also from degradation in output power characteristics of the battery. The heat control device for a battery of the present invention contains i) a radiator for dissipating heat that has generated in a battery through a charging and discharging process; and ii) a heat controller that transforms its shape by heat. The structure can protect a battery ...more ...less
12
US20050118496A1
Publication/Patent Number: US20050118496A1
Publication date: 2005-06-02
Application number: 10/950,104
Filing date: 2004-09-24
Abstract: Disclosed is a method for regulating terminal voltage of a cathode during overdischarge. Also disclosed is a lithium secondary battery, which is low in capacity loss after overdischarge, having excellent capacity restorability after overdischarge and shows an effect of preventing a battery from swelling at a high temperature. Disclosed is a method for regulating terminal voltage of a cathode during overdischarge. Also disclosed is a lithium secondary battery, which is low in capacity loss after overdischarge, having excellent capacity restorability after overdischarge and shows an effect of ...more ...less
13
US20050031937A1
Publication/Patent Number: US20050031937A1
Publication date: 2005-02-10
Application number: 10/940,739
Filing date: 2004-09-14
Abstract: A solid electrolyte battery having improved energy density and safety, the solid electrolyte battery incorporating a positive electrode; a negative electrode disposed opposite to the positive electrode; a separator disposed between the positive electrode and the negative electrode; and solid electrolytes each of which is disposed between the positive electrode and the separator and between the separator and the negative electrode, wherein the separator is constituted by a polyolefin porous film, the polyolefin porous film has a thickness satisfying a range not greater than 5 μm nor greater than 15 μm and a volume porosity satisfying a range not less than 25% nor greater than 60%, and the impedance in the solid electrolyte battery is greater than the impedance realized at the room temperature when the temperature of the solid electrolyte battery satisfies a range not less than 100° C. nor greater than 160° C. A solid electrolyte battery having improved energy density and safety, the solid electrolyte battery incorporating a positive electrode; a negative electrode disposed opposite to the positive electrode; a separator disposed between the positive electrode and the negative ...more ...less
14
US20050260486A1
Publication/Patent Number: US20050260486A1
Publication date: 2005-11-24
Application number: 11/132,468
Filing date: 2005-05-19
Abstract: Disclosed are a safety element for a battery, which is provided with material having a Metal-Insulator Transition (MIT) characteristic where resistance abruptly drops at or above a certain temperature, and a battery with such a safety element. This battery with an MIT safety element is turned into a stable discharged state when it is exposed to an elevated temperature or a battery temperature rises due to external impact, so that it can ensure its safety. Disclosed are a safety element for a battery, which is provided with material having a Metal-Insulator Transition (MIT) characteristic where resistance abruptly drops at or above a certain temperature, and a battery with such a safety element. This battery with an MIT safety ...more ...less