摘要:
A battery construction is disclosed that includes a housing and a spiral-wound electrode assembly disposed in the housing and defining at least two electrochemical cells that are electrically connected in series. Both of the cells include wound layers of a positive electrode, a negative electrode, and a polymer electrolyte provided between the positive and negative electrode layers. The layers of each successive electrochemical cell are wound around the layers of the previous cell and are preferably separated therefrom by an insulating layer. By utilizing a polymer electrolyte, the need for expensive microporous separator layers is eliminated as is the need for providing separate sealed containers to construct a multi-cell battery. Thus, a less-expensive and space-efficient multi-cell spiral-wound electrode construction may be obtained.
摘要:
The thermochromic battery tester comprises a conductive heating element having one end including at least two switch pads for selective coupling of the conductive heating element to a second terminal of the battery. Each of the switch pads provides a different resistivity for the heating element when pressed, to thereby change the calibration of the tester for different discharge rates. The battery tester further includes discharge rate calibration indicia associated with each of the switch pads for indicating which switch pad to press for proper calibration at a relative rate of discharge. The conductive heating element may have at least a portion thereof made of a variable resistivity material having a resistivity that changes in response to ambient temperature so as to compensate for varying ambient temperatures. Preferably, the variable resistivity material has a resistivity that increases as ambient temperature increases.
摘要:
Disclosed is a method of forming porous carbon cathode collectors for electrochemical cells by mixing carbon black with binder and liquid to form a dough, drying it at an elevated temperature, compacting the dried mix at an elevated temperature, milling it to a particle size greater than 0.05 mm and preferably 0.1 to 0.3 mm, and molding the dry milled mix, preferably by auger feeding, to form a collector having a pore size at least 50% by volume being 10 microns or larger and most preferably in the range of 10 to 90 microns.
摘要:
A flat, flexible electrochemical cell is provided. The within invention describes various aspects of the flat, flexible electrochemical cell. A printed anode is provided that obviates the need for a discrete anode current collector, thereby reducing the size of the battery. An advantageous electrolyte is provided that enables the use of a metallic cathode current collector, thereby improving the performance of the battery. Printable gelled electrolytes and separators are provided, enabling the construction of both co-facial and co-planar batteries. Cell contacts are provided that reduce the potential for electrolyte creepage in the flat, flexible electrochemical cells of the within invention.
摘要:
A fluid consuming battery (10) is provided with a fluid regulating system (50) for regulating fluid entry into the battery. The battery (10) includes a fluid consuming cell (20) having a cell housing with fluid entry ports for the passage of a fluid into the cell housing. A first fluid consuming electrode and a second electrode are disposed within the cell housing. The fluid regulating system (50) includes a valve having a moving plate (66) disposed adjacent to a fixed plate (62). The moving plate and fixed plate both have fluid entry ports (68, 64) that align in an open valve position and are misaligned in a closed valve position. The fluid regulating system (50) also includes an actuator that may include one or more shape memory alloy (SMA) components (82a, 82b) for moving the moving plate (66) relative to the fixed plate (62) to open and close the valve.
摘要:
A fluid consuming battery (10) is provided with a fluid regulating system (50) for regulating fluid entry into the battery. The battery (10) includes a fluid consuming cell (20) having a cell housing with fluid entry ports for the passage of a fluid into the cell housing. A first fluid consuming electrode and a second electrode are disposed within the cell housing. The fluid regulating system (50) includes a valve having a moving plate (66) disposed adjacent to a fixed plate (62). The moving plate and fixed plate both have fluid entry ports (68, 64) that align in an open valve position and are misaligned in a closed valve position. The fluid regulating system (50) also includes an actuator that may include one or more shape memory alloy (SMA) components (82a, 82b) for moving the moving plate (66) relative to the fixed plate (62) to open and close the valve.
摘要:
A fluid consuming battery (10) is provided with a fluid regulating system (50) for regulating fluid entry into the battery. The battery (10) includes a fluid consuming cell (20) having a cell housing with fluid entry ports for the passage of a fluid into the cell housing. A first fluid consuming electrode and a second electrode are disposed within the cell housing. The fluid regulating system (50) includes a valve having a moving plate (66) disposed adjacent to a fixed plate (62). The moving plate and fixed plate both have fluid entry ports (68, 64) that align in an open valve position and are misaligned in a closed valve position. The fluid regulating system (50) also includes an actuator that may include one or more shape memory alloy (SMA) components (82a, 82b) for moving the moving plate (66) relative to the fixed plate (62) to open and close the valve. In one embodiment, a friction reduction medium (502) employing lubricating oil (69) and a plurality spherical members (500) is disposed between the moving plate (66) and fixed plate (62) to provide enhanced valve operation.
摘要:
The battery testing circuit of the present invention preferably includes a substrate, a display printed on the substrate for displaying a level of discharge of a battery, a display driver circuit coupled to the display and to the battery for receiving power from the battery to drive the display, and a battery discharge level sensing circuit coupled to the display and to the battery for sensing a discharge level of the battery and for supplying a display signal representing the sensed discharge level to the display. At least one of the circuits is printed on the substrate using processable conductive polymer materials as ink layers. Preferably, the battery discharge level sensing circuit component continuously senses the discharge level and the display continuously displays the discharge level. The display is preferably a field-responsive liquid crystal display made of either polymer liquid crystal or polymer dispersed liquid crystal material. The display may be formed of one or more layers of active liquid crystal material. The display driver circuit is preferably an oscillator that may also be printed on the substrate.
摘要:
A liquid crystal display of the present invention includes a first electrode provided on a substrate, a first liquid crystal layer provided on and in contact with the first electrode, a second electrode provided on and in contact with the first liquid crystal layer, a second liquid crystal layer provided on and in contact with the second electrode, and a third electrode provided on and in contact with the second liquid crystal layer. The display may further include a third liquid crystal layer provided on and in contact with the third electrode, and a fourth electrode provided on and in contact with a third liquid crystal layer. By reducing the thickness of the liquid crystal layers relative to a conventional liquid crystal display, and by providing a plurality of liquid crystal layers, the voltage level required to cause the liquid crystal display to change visual states is substantially reduced without affecting the degree of visual change exhibited by the liquid crystal display. Preferably, at least one of the electrodes is formed of a transparent processable conductive polymer, which is much less expensive than the conventional tin-doped indium oxide materials typically used to form a transparent electrode. The liquid crystal display of the present invention is preferably incorporated in a battery label to display information pertaining to the battery, such as the discharge level of the battery.
摘要:
A tester for use in determining the voltage and state-of-charge of a battery. The tester can be permanently mounted on the battery and employs an electrochromic cell which changes visual appearance, for example, color or intensity of color when electrically connected across the terminals of a battery. The electrochromic cell undergoes an oxidation/reduction reaction on direct application of the DC potential of the battery. The color of the electrochromic cell can be compared with a color comparison chart to determine the condition of the battery.The tester can be permanently electrically connected to the battery or, preferably, can be connected momentarily to determine the state of the battery.