790results about "Primary cell maintainance/servicing" patented technology

A battery pack has a flat battery cell, which includes a flat electric power generating element, at least one armor material for sealing the electric power generating element, and positive and negative tabs (1a, 2a) extending from the electric power generating element to the outside of the armor material through a sealing of the armor material; a circuit board (6) connected to the positive and negative tabs; and a container (16) having two main walls extending along two main surfaces of the flat battery cell. At least a portion of the circuit board is positioned in a space (8) defined by a sealing of the armor material beside the circuit board and the inner surface of the container. At least one of the two main walls of the container is at least partially formed of a metal plate (12a, 14a).

A cordless power tool has a housing which includes a mechanism to couple with a removable battery pack. The battery pack includes one or more battery cells as well as a system to dissipate heat from the battery pack.

The present invention provides a human engineered power and control system for artificial hearts or assist devices configured for ease of use, ruggedness, and high reliability. Battery powered systems of the prior art have required multiple cables and connectors that are subject to failure due to damage or wear. In the present invention, direct connection of the batteries to the control system eliminates multiple cables and connectors used with previous designs. A novel method of connecting batteries to the control system and exchanging batteries without interruption of power is provided in a compact user friendly configuration. The control system may provide periodic reductions in assist device flow to permit the natural ventricle to eject blood through the natural outflow valve, open the valve leaflets to prevent them from adhering together, and achieve sufficient washout to prevent thrombosis. Using either software based control or software independent electronic circuitry, the flow pumped by the artificial heart is reduced for a long enough period of time to permit at least a few beats of the natural heart to generate sufficient pressure to open the outflow valve. In a control system embodiment in which the patient manually adjusts the pump speed to incremental settings for rest and exercise conditions, a pulsatile flow mode is disclosed which provides approximately the same flow at a given incremental setting as the pump produces when running in a constant speed mode at the same setting. As the patient learns which speed setting is best for daily activities, the patient may use the same setting with either a pulsatile or constant pump speed mode.

An electrochemical cell having a current interrupting switch as an internal component of the cell that is thermally responsive and breaks an electrical path within the cell thereby preventing current flow when temperature within the cell is at or above an activating temperature. The switch is reversible and current flow and a closed circuit is re-established when temperature within the cell returns below the activating temperature.

An improved gas-diffusion cathode for use in an electrochemical cell comprising an electrically conductive cathode member having a first side communicable with an aqueous electrolyte and a second side communicable with a gaseous medium; and a water-impermeable membrane adjacent said cathode member second side to reduce passage of liquid water between said cathode member and said gaseous medium and having a membrane first side and a membrane second side wherein said membrane first side faces said cathode member and wherein said water-impermeable membrane comprises one or more portions defining one or more openable and closeable apertures the improvement wherein said apertures are associated with one or more integrally-formed resiliently flexible flaps on said membrane first side to effect said opening and closing. The batteries have reduced unwanted water vapour ingress and egress characteristics in its no-load mode.

Disclosed are an apparatus and a method for estimating a state of charge of a battery representing a non-linear characteristic by using a neural network. The apparatus includes a sensing section for detecting current, voltage and a temperature from a battery cell, a neural network performing a neural network algorithm and a learning algorithm based on data of the current, voltage and temperature transmitted thereto from the sensing section and present time data, thereby outputting the SOC of the battery estimated through a final learning algorithm, and a comparator for comparing an output value of the neural network with a predetermined target value and making the neural network iteratively perform the learning algorithm if a difference between the output value of the neural network and the predetermined target value is out of a predetermined limit, thereby update the learning algorithm to generate the final learning algorithm. The state of charge of the battery is precisely estimated through the neural network algorithm.

The present invention relates to an anode material excellent in its charging and discharging characteristics and a secondary battery excellent in its charging and discharging cyclic characteristics. An anode active material is used for a nonaqueous electrolyte secondary battery including an anode having the anode active material, a cathode having a cathode active material and a nonaqueous electrolyte. The capacity of the anode is expressed by the sum of a capacity component obtained when light metal is doped and dedoped in an ionic state and a capacity component obtained when the light metal is deposited and dissolved. The light metal includes an anode base material capable of doping and dedoping the light metal in an ionic state and a fibrous material having an electric conductivity.

A battery and a battery pack comprising a rechargeable battery (2) and a circuit substrate (3) integrated therein by a resin mold package (11) are provided. Resin is filled between the rechargeable battery (2) and the substrate (3) electrically connected thereto, so as to unite them as one battery or battery pack. The rechargeable battery (2) includes an engaging member (26) which functions as an anchor to the resin mold package (11) formed onto the battery, whereby the resin mold package (11) is firmly joined to the rechargeable battery (2). A thermo-sensitive element can be incorporated either on the circuit substrate (3) or within the space filled with resin.

An electrostatic charge storage assembly having capacitor and a discharge regulator is provided. In one embodiment, the electrostatic charge storage assembly further includes an inductive charging circuit operative to charge the capacitor. In another embodiment, the electrostatic charge storage assembly further includes a charge regulator. In a further embodiment, the electrostatic charge storage assembly of the present invention is adapted to be removably inserted within a battery housing of an electronic device. In a further embodiment, the electrostatic charge storage assembly of the present invention is adapted to fit within a housing, said housing being of the same or smaller dimensions of one or more standard or non-standard primary or secondary batteries.

A method, device and system is disclosed for rapidly and safely discharging remaining energy stored in an electrochemical battery 104 in the event of an internal short circuit or other fault. In its best mode of implementation, if a sensor 116 detects one or more parameters such as battery temperature 204 or pressure 206, exceeding a predetermined threshold value 334, the terminals 144 of the battery or cell are intentionally short-circuited external to the battery through a low or near zero resistance load 150 which rapidly drains energy from the battery 104. The rate energy is drained via the external discharge load 150 may be controlled with an electronic circuit 136 responsive to factors such as state of charge and battery temperature. Devices such as piezoelectric and Peltier devices 300, may also be used as emergency energy discharge loads.

A heat insulation sheet (16) covers a temperature fuse (10) arranged on a sealing plate (23) of a rechargeable battery (2) so as to provide a shield from heat of resin that is filled in a gap between the rechargeable battery (2) and a circuit substrate (3) to form a primary mold (11) and to prevent destruction of the temperature fuse (10) caused by the heat.

This invention aims to improve the reliability of an electronic control system which drives an actuator on conveyance operation based on an electrical signal to make adjustments such as acceleration/deceleration and movement direction of a conveyance, by achieving a power unit for conveyances having a power source with no need of charge and with little performance deterioration, thereby allowing for practical application of high-performance conveyances. The present invention relates to a power unit for conveyance comprising a main power source and a stand-by power source, which is characterized in that a thermal battery is provided as the stand-by power source, and a conveyance which is provided with an electronic control system and the power unit for conveyance of the present invention, is constituted so that electric power for operating the electronic control system is supplied to the electronic control system from the power unit for conveyances. By employing a thermal battery as the stand-by power source as thus, the stand-by power source does not require to be charged and the long-term reliability of the stand-by power source is also ensured.

A battery unit for a secondary battery that includes a positive electrode plate, a positive electrode tab, a negative electrode plate, a negative electrode tab, a separator, and short circuit preventing units, wherein the short circuit preventing units are formed on corresponding uncoated areas of the positive and negative electrode current collectors where the positive and negative electrode sheets are not formed, each short circuit preventing unit having a corresponding width greater than a width of the corresponding positive and negative electrode current collectors.

A fuse is melted and cut off when an overcurrent flows through the fuse. The fuse has a different thermal expansion coefficient metal laminate obtained by laminating a plurality of different thermal expansion coefficient metal plates. When the fuse is melted and cut off by heat of the overcurrent, a mechanical deforming force is applied to a melting portion of the fuse. The mechanical force is caused by the difference between thermal expansion coefficients of the different thermal expansion coefficient metal plates.

A secondary battery includes a container an electrode assembly mounted in the container having a positive electrode, a negative electrode, and a separator interposed between the positive electrode and the negative electrode, and a cap assembly fixed to the container to seal the container. The cap assembly includes a cap plate having a terminal, a current breaker electrically connected to the cap plate; and a vent plate having a safety vent electrically connected to the current breaker, the shape of the vent plate being altered by the internal pressure of the secondary battery to alter the shape of the current breaker, and the current breaker cutting off the current path of the cap assembly.

An electrode assembly is formed by respectively overlaying a sheet cathode 1, a sheet separator 3 and a double-sided sheet anode 8 to form a stacked structure 10, and subjecting the stacked structure to multiple folds, wherein the initial fold comprises folding the cathode in half around the double-sided anode so as to surround the respective upper and lower active anode surfaces thereof. The multiple folds may comprise one or more subsequent parallel folds made with the fold line D-D extending perpendicular to the original length of the stacked structure such that its overall length is halved at each fold. A pouch battery comprising said electrode assembly has improved safety and performance characteristics. The pouch battery construction has especial application to lithium primary batteries.

A microvalve for controlling fluid flow, including a body portion having a plurality of spaced openings formed therein, a shutter located adjacent to and substantially parallel with the body portion having a plurality of spaced openings formed therein, a drive mechanism for causing the shutter to move laterally with respect to the body portion so that the spaced openings of the shutter are brought into and out of alignment with the spaced openings of the body portion, wherein the microvalve is in an open position and a closed position, respectively, and, a latching mechanism for preventing the shutter from moving laterally with respect to the body portion.

The invention discloses a battery pack with thermal conducting adhesives. The battery pack comprises a shell and a plurality of battery units, wherein the shell is provided with a cooling device, the battery units are arranged in the shell, the thermal conducting adhesives with an electric insulation characteristic and a thermal conducting characteristic are arranged outside the battery units and are in contact with the outer surfaces of the battery units.