A positive electrode active material includes: secondary particles obtained by aggregation of a plurality of primary particles. The primary particles include, core particles including a lithium composite oxide, and a layer that is provided on surfaces of the core particles and includes a lithium composite oxide. The lithium composite oxide included in the core particles and the lithium composite oxide included in the layer have the same composition or almost the same composition, and crystallinity of the lithium composite oxide included in the layer is lower than crystallinity of the lithium composite oxide included in the core particles.

The present invention provides a new and useful apparatus for charging battery powered electronic devices using a rolling means. The rolling means transfers mechanical energy from a plurality of wheels to a generator by way of a gear ratio. The generator in turn yields electrical energy that is later transformed via integrated circuitry into viable power for the purposes of charging an optional internal batter or that of an attached device. This apparatus does not limit the user's mobility and can be used in everyday settings. The apparatus can be an integral part of a piece of luggage or added to an existing hand cart. Additionally, the apparatus can have a connection for a DC input to charge the internal battery when the apparatus is not in motion.

A nonaqueous electrolyte secondary battery of the present invention includes a positive electrode containing olivine-structured Fe or a Mn-containing phosphorus compound as a positive electrode active material; a negative electrode containing a titanium-containing metal oxide capable of inserting and extracting lithium ions as a negative electrode active material; a nonwoven fabric separator, which contains an electrically insulating fiber and is bonded to a surface of at least one of the positive electrode and the negative electrode; and a nonaqueous electrolyte. In a thickness direction of the nonwoven fabric separator, a density of the fiber on a side having contact with the positive electrode is high, and a density of the fiber on a side having contact with the negative electrode is low.

The present invention provides a nonaqueous electrolyte secondary battery separator that achieves an excellent rate characteristic by having a tensile creep compliance J satisfying at least one of the following three conditions in a case where stress of 30 MPa is applied for t seconds: (i) when t=300 seconds, J=4.5 GPa−1 to 14.0 GPa−1, (ii) when t=1800 seconds, J=9.0 GPa−1 to 25.0 GPa−1, (iii) when t=600 seconds, J=12.0 GPa−5 to 32.0 GPa−1.

A separator for a rechargeable battery and a rechargeable lithium battery, the separator including a porous substrate; and a heat-resistant porous layer on at least one surface of the porous substrate, wherein the heat-resistant porous layer includes a filler and a copolymer including a structural unit of vinylidenefluoride, a structural unit of hexafluoropropylene, and a structural unit of a carboxyl-containing monomer, the structural unit of hexafluoropropylene is present in an amount of about 4 wt % to about 10 wt %, based on a total weight of the copolymer, and the structural unit of a carboxyl-containing monomer is present in an amount of about 1 wt % to about 7 wt %, based on the total weight of the copolymer.

A secondary battery includes a case composed of a metal containing aluminum as a main component, a stacked electrode assembly arranged in the case, a negative electrode current collector electrically connecting negative electrodes of the stacked electrode assembly to a negative electrode terminal, a positive electrode current collector electrically connecting positive electrodes of the stacked electrode assembly to a positive electrode terminal, a first metal plate arranged between the case and the stacked electrode assembly, and a spacer arranged between the case and the first metal plate, the spacer being composed of an insulating material. The positive electrodes are electrically connected to the case or a second metal plate arranged on the first metal plate with an insulating member provided between the first metal plate and the insulating member. The negative electrode current collector is in contact with the first metal plate to establish electrical connection between the negative electrode current collector and the first metal plate.

A secondary battery is disclosed. In one aspect, the secondary battery includes a case accommodating an electrode assembly, a cap plate sealing an opening of the case, an electrode terminal electrically connected to the electrode assembly and disposed over the cap, and an insulating member provided between the cap plate and the electrode terminal and configured to insulate the electrode terminal from the cap plate. The battery also includes a connection tab disposed over the electrode terminal, and a safety device having a portion positioned under the connection tab and electrically connected to the electrode terminal via the connection tab. The safety device has at least one of electric conductivity and thermal conductivity greater than that of the connection tab, and at least a part of the safety device is seated on the insulating member.

The object of the present invention is to provide a positive electrode active material usable for a lithium ion battery capable of high charge/discharge cycle performance and high discharge capacity. The positive electrode active material for a lithium secondary battery has a layered structure and comprises at least nickel, cobalt and manganese. Further, the positive electrode active material satisfies requirements (1) to (3) below: (1) a primary particle size of 0.1 μm to 1 μm, and a 50% cumulative particle size D50 of 1 μm to 10 μm, (2) a ratio (D90/D10) of volume-based 90% cumulative particle size D50 to volume-based 10% cumulative particle size D10 of 2 to 6, and (3) a lithium carbonate content in a residual alkali on particle surfaces of 0.1% by mass to 0.8% by mass as measured by neutralization titration.

The positive electrode as an embodiment includes a positive electrode current collector mainly composed of aluminum, a positive electrode mixture layer containing a lithium-containing transition metal oxide and disposed above the positive electrode current collector, and a protective layer disposed between the positive electrode current collector and the positive electrode mixture layer. The protective layer contains inorganic particles, an electro-conductive material, and a binding material; is mainly composed of the inorganic particles; and is disposed on the positive electrode current collector to cover the positive electrode current collector in approximately the entire area where the positive electrode mixture layer is disposed and at least a part of the exposed portion of the positive electrode current collector where the positive electrode mixture layer is not disposed on the surface of the positive electrode current collector.

The present invention relates to a positive electrode active material for a sodium secondary battery, and a method for preparing the same. The positive electrode active material for the sodium secondary battery according to the present invention is structurally more stable by replacing a part of the transition metal with Li, and accordingly, the thermal stability and life characteristics of the sodium battery including the positive electrode active material are greatly improved.

A carbon material for a non-aqueous secondary battery containing a graphite capable of occluding and releasing lithium ions, and having a cumulative pore volume at pore diameters in a range of 0.01 μm to 1 μm of 0.08 mL/g or more, a roundness, as determined by flow-type particle image analysis, of 0.88 or greater, and a pore diameter to particle diameter ratio (PD/d50 (%)) of 1.8 or less, the ratio being given by equation (1A): PD/d50 (%)=mode pore diameter (PD) in a pore diameter range of 0.01 μm to 1 μm in a pore distribution determined by mercury intrusion/volume-based average particle diameter (d50)×100 is provided.

A flow battery includes a positive electrode, a positive electrode electrolyte, a negative electrode, a negative electrode electrolyte, and a polymer electrolyte membrane interposed between the positive electrode and the negative electrode. The positive electrode electrolyte includes water and a first redox couple. The first redox couple includes a first organic compound which includes a first moiety in conjugation with a second moiety. The first organic compound is reduced during discharge while during charging the reduction product of the first organic compound is oxidized to the first organic compound. The negative electrode electrolyte includes water and a second redox couple. The second couple includes a second organic compound including a first moiety in conjugation with a second moiety. The reduction product of the second organic compound is oxidized to the second organic compound during discharge.

A battery electrolyte solution contains a lithium salt dissolved in a solvent phase comprising at least 10% by weight of methyl (2,2,3,3-tetrafluoropropyl) carbonate. The solvent phase comprises optionally other solvent materials such as 4-fluoroethylene carbonate and other carbonate solvents. This battery electrolyte is highly stable even when used in batteries in which the cathode material has a high operating potential (such as 4.5V or more) relative to Li/Li+. Batteries containing this electrolyte solution therefore have excellent cycling stability.

A lithium ion secondary battery including: a positive electrode including a positive electrode active material capable of intercalating and deintercalating a lithium ion; a negative electrode including a negative electrode active material capable of intercalating and deintercalating a lithium ion; and a non-aqueous electrolytic solution, wherein the positive electrode active material includes a Mn-based spinel-type composite oxide and an additional active material, and the content of the Mn-based spinel-type composite oxide based on the whole of the positive electrode active material is 60% by mass or less, and the negative electrode active material includes a first graphite particle containing natural graphite and a second graphite particle containing artificial graphite, and the content of the second graphite particle based on the sum total of the first graphite particle and the second graphite particle is in the range of 1 to 30% by mass.

Provided is a positive electrode active material that can be used to fabricate a nonaqueous electrolyte secondary battery having excellent output characteristics not only in an environment at normal temperature but also in all temperature environments from extremely low to high temperatures. A positive electrode active material for nonaqueous electrolyte secondary batteries, the positive electrode active material includes a boron compound and lithium-nickel-cobalt-manganese composite oxide of general formula (1) having a layered hexagonal crystal structure. The lithium-nickel-cobalt-manganese composite oxide includes secondary particles composed of agglomerated primary particles. The boron compound is present on at least part of the surface of the primary particles, and contains lithium. Li1+sNixCoyMnzMotMwO2 (1)

A solid electrolyte for an all-solid secondary battery, the solid electrolyte including: Li, S, P, an M1 element, and an M2 element, wherein the M1 element is at least one element selected from Na, K, Rb, Sc, Fr, and the M2 element is at least one element selected from F, Cl, Br, I, molar amounts of lithium and the M1 element satisfy 0

The described technology relates to an electrolyte solution comprising a sulfur dioxide-based ionic liquid electrolyte, and a sodium-sulfur dioxide (Na—SO2) secondary battery having same, one purpose of the described technology being to enhance the storage characteristics of sulfur dioxide gas in an electrolyte solution. The sodium-sulfur dioxide secondary battery includes a negative electrode which is formed from an inorganic material and which contains sodium. The battery also includes a positive electrode which is formed from a carbon material and a sulfur dioxide-based inorganic electrolyte solution. Here, the electrolyte solution contains a sulfur dioxide-based ionic liquid electrolyte prepared by injecting SO2 gas in an ionic liquid.

A lithium secondary battery includes: a negative electrode, a positive electrode, and an electrolyte disposed between the negative electrode and the positive electrode, wherein the negative electrode includes a silicon composite including silicon, a silicon oxide of the formula SiOx wherein 0

A battery electrolyte solution contains a lithium salt dissolved in a solvent phase comprising at least 10% by weight of ethyl (2,2,3,3-tetrafluoropropyl) carbonate. The solvent phase comprises optionally other solvent materials such as 4-fluoroethylene carbonate and either or both of diethyl carbonate and ethyl methyl carbonate. This battery electrolyte is highly stable even when used in batteries in which the cathode material has a high operating potential (such as 4.5V or more) relative to Li/Li+. Batteries containing this electrolyte solution therefore have excellent cycling stability.

A battery electrolyte solution contains a lithium salt dissolved in a solvent phase comprising at least 10% by weight N of (2,2-difluoroethyl) ethyl carbonate. The solvent phase comprises optionally other solvent materials such as 4-fluoroethylene carbonate and other carbonate solvents. This battery electrolyte is highly stable even when used in batteries in which the cathode material has a high operating potential (such as 4.5V or more) relative to Li/Li+. Batteries containing this electrolyte solution therefore have excellent cycling stability.

A lithium secondary battery includes a case, a jelly roll housed in the case, the jelly roll including a plurality of electrode plates and a separation film disposed between the plurality of electrode plates, and a heat conduction plate disposed on both sides of the jelly roll and housed in the case together with the jelly roll.

The invention relates to a method for operating a secondary battery (1, 4) which comprises multiple interconnected, bridgeable battery subunits (A, B) and is situated in a compartment (3) of an electrically driven vehicle, in particular a watercraft, characterized in that the accessibility of each battery subunit (A, B) is detected, and the battery subunits (A, B) are activated in accordance with the accessibility of the particular battery subunits.

An additive formulation for a lithium ion battery is provided, which includes an ionic conductor and a compound having a maleimide structure. An electrode slurry composition is also provided, which includes an active material, a conductive additive, an adhesive, and an additive formulation containing an ionic conductor and a compound having a maleimide structure modified by a compound having a barbituric acid structure.

A battery system for an electric vehicle includes a container having a lid and a plurality of battery cells housed in the container. Each battery cell of the plurality of battery cells may include a pair of tabs to electrically connect to the battery cell, a printed circuit board housed in the container, and a pair of contact elements. The printed circuit board may include circuitry adapted to monitor at least one battery cell. And, each contact element may be attached to the printed circuit board and configured to separably contact a tab of the at least one battery cell to electrically connect the at least one battery cell to the printed circuit board.

A system and method for a battery cell having an anode and a cathode, and a separator disposed between the anode and the cathode. A conductive layer disposed in the separator facilitates detection of dendrite growth from the anode into the separator, the detection correlative with a reduction in voltage between the anode and the conductive layer. A detection interface component coupled to the conductive layer is configured to facilitate routing of a signal from the conductive layer to a circuit external to the battery cell, the signal indicative of the detection. The battery cell may be part of a battery or battery pack which may be utilized by an electronic device.

A battery pack has a battery pack housing that defines an interior region, and a battery module that is disposed in the interior region. The battery module has a first battery cell, and a first heat exchanger defining a first flow path portion therethrough. The battery pack further includes a first electric fan and a thermally conductive housing that are disposed in the interior region. The thermally conductive housing has a first housing portion, and at least first and second cooling fins defining a second flow path portion therebetween. At least a portion of the second flow path portion is substantially in-line with the first flow path portion. The first electric fan urges air to flow through an inlet aperture, the first flow path portion, the second flow path portion, and through the first electric fan to a first outlet aperture to cool the battery module.

A battery module and a method of manufacturing the same are provided. The battery module includes a case providing an internal space, a plurality of battery cells disposed in the internal space of the case, and at least one cooling unit interposed between the battery cells to be in surface contact with the battery cells and dissipating heat generated by the battery cells externally.

A battery, a thermal management device of the battery, and an unmanned aerial vehicle having the battery are provided. The thermal management device comprises a heat conducting housing having a receiving cavity and configured to divide the receiving cavity into a plurality of cell compartments for receiving cells, and a heat conducting shelf mounted within the receiving cavity and configured to be in contact with at least one of the cells to conduct heat generated by the at least one of the cells. The heat conducting shelf is thermally connected with an inner wall of the receiving cavity and configured to conduct heat in the heat conducting shelf to the heat conducting housing.

The invention relates to a housing (10) for accommodating a plurality of battery cells (20), in particular lithium-ion battery cells, wherein the housing (10), in particular a plastic housing, comprises a cooling device with an inlet point (30) and an outlet point (40) for an air stream (22) for cooling the battery cells (20). In addition, the housing (10) is designed as a single piece together with the cooling device integrated in the housing (10), and the cooling device additionally has spacers (34; 34a, 34b) for arranging all accommodated battery cells (20) with an intermediate space (23) for guiding air between the battery cells (20), by which means an air channel (25) is provided for the air stream (22) between the battery cells (20). The invention further relates to a battery pack (50) and to a motor vehicle comprising such a battery pack (50).

An adaptive algorithm based battery-powered long distance wireless temperature and humidity sensor module. The sensor module uses an adaptive algorithm to transmit data on an event basis and/or a reduced basis to extend battery life to more than 10 years. It also uses a low power wireless transmitter which has frequency of sub-1 GHz and an effective transfer distance of up to 250 meters, a low power temperature and humidity sensor, and a long lasting lithium battery which has shelf life of 20 years.

A method of manufacturing a lithium-ion secondary battery electrode sheet disclosed herein includes the step of preparing powder 220 of granulated particles. In this step, the powder (220) of granulated particles (240) including active material particles (241) and a hinder (242) is prepared. The powder (220) is deposited on a strip-shaped collector foil (201) that is being conveyed. Then, the powder (220) is removed from widthwise center portions (202) and (203) of the collector foil (201), and a squeegee (106) is brought into contact with the powder (220) remaining on the opposite sides of the center portions (202) and (203) of the collector foil (201), thus adjusting the thickness of the powder (220). Subsequently, the powder (220) remaining on the opposite sides of the center portions (202) and (203) of the collector foil (201) is pressed.

Disclosed is a silicon-based anode active material for a lithium secondary battery. The silicon-based anode active material imparts high capacity and high power to the lithium secondary battery, can be used for a long time, and has good thermal stability. Also disclosed is a method for preparing the silicon-based anode active material. The method includes (A) binding metal oxide particles to the entire surface of silicon particles or portions thereof to form a silicon-metal oxide composite, (B) coating the surface of the silicon-metal oxide composite with a polymeric material to form a silicon-metal oxide-polymeric material composite, and (C) heat treating the silicon-metal oxide-polymeric material composite under an inert gas atmosphere to convert the coated polymeric material layer into a carbon coating layer.

A battery connector is provided which is used to electrically connect a button battery. The connector has an insulating housing and positive and negative terminals. The housing has a limiting space for receiving and fixing the battery. The positive terminal has a positive contact portion which extends into the space and a first tail portion which maintains an electrical connection with a circuit board. The negative terminal has a negative contact portion which extends into the space so as to contact a negative electrode on a bottom surface of the battery, a second tail portion which maintains an electrical connection with the board, and a connection portion which is brought to move by the negative contact portion so as to electrically connect with the board when the battery is received in the space. The battery connector can be provided as part of a circuit module having an indicating member.

The present disclosure provides a semiconductor device including: a power supply input section to which a first voltage from a battery cell is input; a boosting section including one end to which the first voltage from the power supply input section is input, and another end that, based on a control signal from a controller, outputs the first voltage or a second voltage boosted from the first voltage from as a power supply voltage; and a comparison section including an output section, a first input section connected to the power supply input section and the one end of the boosting section, and a second input section connected to the another end of the boosting section, the comparison section outputting a voltage from the output section that corresponds to a difference between voltages input to the first input section and the second input section.

A battery checker is provided with: voltage application unit configured to apply an AC voltage to a battery to be measured; ripple voltage measurement unit configured to measure a ripple voltage contained in a terminal voltage of the battery; and electric power storage level detection unit configured to detect an electric power storage level of the battery by comparing the measured ripple voltage with a set reference. The voltage application unit includes a transformer that transforms voltage for an alternating current of an AC power supply such as a commercial AC power supply, and an output circuit that applies, to the battery, an alternating current with transformed voltage.

A semiconductor device for measuring a voltage of a battery cell, including first and second nodes, and first and second battery voltage measurement units. The first node is configured to receive a first voltage, the first voltage being a voltage of a capacitor that accumulates an electric charge based on the voltage of the battery cell. The first battery voltage measurement unit measures the first voltage through a first path. The second node is configured to receive a second voltage based on the voltage of the battery cell, the second node being different from the first node. The second battery voltage measurement unit measures the second voltage through a second path that is different from the first path.

A method and apparatus is provided the battery sensor for a large-scale battery system. More specifically, the present disclosure relates to the architecture and measurement scheme for a high-accuracy battery voltage sensor based on a calibration scheme. The present disclosure also related to the architecture and measurement method for a cell-level current sensor to effectively and reliably manage a battery pack.

A transfer system includes an expander roll for removing a wrinkle in a separator original sheet, and (i) the expander roll and (ii) a transfer roller immediately followed by or following the expander roll are spaced from each other at a distance of not less than 1 m and not more than 10 m.

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