A battery pack includes a housing, a plurality of rechargeable battery cells, a connection interface, a near-field communication (NFC) reader, a battery management system, and a communication gateway. The connection interface is in communication includes a plurality of data pins, a positive terminal, and a negative terminal. The battery management system is in communication with the NFC reader and is configured to receive information from the NFC reader including an NFC tag identification, then retrieve stored parameters corresponding to the NFC tag identification, and configure at least one of the plurality of data pins based upon the stored parameters corresponding to the NFC tag identification.

The present invention provides a fire extinguishing sheet suitable for productivity, mass production, and large-scale production, wherein the fire extinguishing sheet can be used in places, facilities, structures, etc., where a fire may occur, and has an initial fire extinguishing function. The fire extinguishing sheet according to the present invention contains a fire extinguishing agent that when a predetermined temperature is reached, thermally decomposes to generate a fire extinguishing component.

The disclosure relates to a rechargeable battery pack for a hand-held power tool, having an interface for establishing an electrical connection of the rechargeable battery pack to a hand-held power tool and/or a charging device. The interface has contact elements for electrically contacting corresponding mating contact elements on the hand-held power tool and/or on the charging device. One contact element is a signal contact element which is electrically connected to an encoder element of the rechargeable battery pack. A rechargeable battery pack electronics is configured to provide information relating to the rechargeable battery pack via the signal contact element, said information relating to the rechargeable battery pack being stored, at least in part, in the at least one encoder element, wherein in the rechargeable battery pack electronics, the encoder element is connected, in an electric parallel circuit, in parallel with a dynamic current path.

A class of compositions that are inclusive of a lithium metal oxide or oxyfluoride compound having a general formula: LiTM[n]OF where TM[n] represents a number of transition metal species inclusive of transitional metal species differentiated by charge or d.sup.0 electron shell conformation, with [n] being at least 4 of said transitional metal species, and wherein said lithium metal oxide or oxyfluoride has a cation-disordered rocksalt (DRX) structure and a mitigated SRO via a high entropy DRX design strategy. Also featured is a method of synthesizing the high entropy DRX lithium metal oxide or oxyfluoride compounds, as well as usage of the same in Li-ion batteries, with particular utility in cathodes of such Li-ion batteries.

Secondary batteries using lithium cobalt oxide as positive electrode active materials have a problem of a decrease in battery capacity due to repeated charging/discharging, for example. A positive electrode active material particle which hardly deteriorates is provided. In a first step, a container in which a lithium oxide and a fluoride are set is placed in a heating furnace, and in a second step, the inside of the heating furnace is heated in an atmosphere containing oxygen. The heating temperature of the second step is from 750° C. to 950° C., inclusive. By the manufacturing method, fluorine can be contained in the positive electrode active material particle to increase the wettability of the surface of the positive electrode active material so that the surface of the positive electrode active material is homogenized and planarized. The crystal structure of the thus manufactured positive electrode active material is unlikely to be broken in repeated high-voltage charging/discharging. Thus, secondary batteries using the positive electrode active material having such a feature have greatly improved cycle characteristics.

There are provided an aqueous electrolyte solution having an extended potential window, in particular, an aqueous electrolyte solution whose potential window is further wider than those exhibited by conventional concentrated aqueous electrolyte solutions, and an aqueous electrolyte solution in which the cycle characteristics can be improved. A non-aqueous electrolyte solution capable of achieving a higher energy density is provided, the non-aqueous electrolyte solution containing easily available and inexpensive materials and having further improved characteristics. One aqueous electrolyte solution of the present embodiment contains a salt of at least one selected from the group consisting of sodium, magnesium, potassium and lithium, and a chaotropic additive. One other non-aqueous electrolyte solution of the present embodiment contains a salt of at least one selected from the group consisting of sodium, magnesium, potassium and lithium, and a chaotropic additive.

A positive electrode active material having a crystal structure that is unlikely to be broken by repeated charging and discharging is provided. A positive electrode active material with high charge and discharge capacity is provided. One embodiment of the present invention is a positive electrode active material containing lithium, cobalt, nickel, and oxygen; in which a molar ratio of lithium, cobalt, and nickel is lithium: cobalt: nickel=1:1−x: x (0.3<x<0.75); in which the average of a bond distance between cobalt and oxygen and a bond distance between nickel and oxygen is longer than or equal to 1.94×10.sup.−10 m and shorter than or equal to 2.1×10.sup.−10 m in a crystal structure of the positive electrode active material; and in which the average of an angle formed between a line connecting cobalt to an adjacent oxygen and a line connecting cobalt to another adjacent oxygen and an angle formed between a line connecting nickel to an adjacent oxygen and a line connecting nickel to another adjacent oxygen is greater than or equal to 86.5° and less than 90°.

A power tool includes a body, a power assembly, an output member, a clamping device, a battery pack, and a baseplate assembly. The power assembly is disposed in the body. The output member is driven by the power assembly to output power. The clamping device is connected to the output member and used for clamping a work attachment. The battery pack is connected to the body and supplies power to the power assembly. The baseplate assembly is connected to the body and includes a baseplate in contact with a workpiece. The battery pack includes a first support unit, the baseplate includes a second support unit, and the first support unit and the second support unit are disposed in the same support plane.

A power regulation unit is provided for regulating power to or from a power tool battery pack. The power regulation unit includes power regulation circuitry and a controller. The power regulation circuitry is configured to regulate a received power. The controller is connected to the power regulation circuitry. The controller is configured to receive input power from one or more battery cells, regulate the input power by performing at least one of a voltage regulation and a current regulation, and output a regulated output power. For voltage regulation, the regulated output power includes a constant voltage regardless of an operating current of the power tool. For current regulation, the regulated output power includes a constant voltage up to a predetermined current threshold.

Provided is an electric device capable of suppressing vibration of a battery pack. Included are: a first housing 21 accommodating a load portion that consumes electric power; a second housing 22 having one end portion connected to the first housing 21 and another end portion to which a battery pack 9 is connectable; and an elastic member 40 interposed between the first housing and the second housing. The first housing includes a first restricting portion 42 positioned away from the elastic member, and the second housing includes a second restricting portion 44 positioned away from the elastic member and engageable with the first restricting portion. In a case where the second housing is urged to be separated from the first housing, the elastic member is deformed and the first restricting portion and the second restricting portion are engaged with each other to prevent separation.