摘要:
A prismatic battery module employs a prismatic battery case having a single space formed by connecting a plurality of prismatic cell cases in series. Collectors are connected to the lead portions on both sides of the electrode plate group, and adjacent collectors of associated electrode plate groups are connected to each other by using an electroconductive adhesive. The electrode plate groups connected in series are disposed in the prismatic battery case. Thereafter, a sealing material is applied to each space between each of the outer peripheries of the adjacent collectors and the wall surface of the prismatic battery case to partition the plurality of cell cases from one another.
摘要:
The invention is directed to an SVO electrochemical cell having high rate capability. The cathode is produced by coating a mixture of an active material, conductive additives, a mixed binder, and an aluminum foil current collector. The mixed binder consists of a mixture of heat treated polyamic acid with PVDF. The use of heat treated polyamic acid maintains adhesion to the conductive current collector while the PVDF portion of the binder gives flexibility. A particularly preferred couple is of a lithium/silver vanadium oxide (Li/SVO) chemistry and the binder mixture enables an active slurry of SVO to be coated onto a current collector without delamination.
摘要:
A method of attaching a battery cell in an apparatus acted upon by centrifugal force avoids an extreme decline in discharge capacity of the battery cell when acted upon by the centrifugal force. The battery, of the type including a positive polarity material and a negative polarity material which are placed in opposition in a thickness direction of a battery case with an intervening separator disposed therebetween, and a liquid electrolyte packed inside the battery case, is mounted in the apparatus, oriented such that a negative polarity material side of the battery cell faces generally in a direction in which the centrifugal force acts on the apparatus, and an angle of inclination of a thickness direction of the battery cell is within a range of 0 to about 60 degrees relative to the direction of the centrifugal force.
摘要:
A method for placing an edge piece on a battery plate includes bending a thin strip of bendable plastic material into an open top, U-shaped channel. The channel is then cut into an edge piece having a length which is substantially equal to the edge of the battery plate which is to be covered. The edge piece is supported with this open top oriented towards a battery plate that is transported toward it in a manner such that the battery plate edge will be inserted into it. Once the edge of the battery plate has been inserted into the edge piece the edge piece is released so that the battery plate can be carried out of the apparatus. An apparatus for accomplishing this includes a feed mechanism which transports the strip of bendable plastic material. A bending mechanism forms this strip into the open top, U-shaped channel. The channel is then fully inserted into an assembly station where a first sensor stops the feed mechanism and a cutter cuts the channel into the proper-sized edge piece. An in-feed conveyor transports a battery plate toward the edge piece, and a support mechanism supports the edge piece while the edge of the battery plate is inserted into it. The support mechanism then releases the edge piece so that it can travel out of the insertion station with the battery plate. A second sensor restarts the feed mechanism once the battery plate is completely out of the assembly station.
摘要:
A method for producing a nickel metal-hydride storage battery includes: (i) assembling a battery by enclosing the positive electrodes, the negative electrodes, separators, and an electrolyte in a case; (ii) charging the battery with electric current in a range of 0.05 C (ampere) to 0.2 C (ampere) until a state of charge rises to a range of 10% to 30%; (iii) overcharging the battery that has been subjected to the charging, with electric current in a range of 0.2 C (ampere) to 1 C (ampere), and thereafter discharging the same until the state of charge lowers to 10% or below; and (iv) subjecting the battery after overcharging to a plurality of charging-discharging cycles, each charging-discharging cycle being composed of charging the battery that has been subjected to the overcharging, with electric current in a range of 0.2 C (ampere) to 5 C (ampere) until the state of charge rises to a range of 60% to 95%, and discharging the same until a battery voltage lowers to a range of 0.70 V to 1.05 V. In this method, in the charging-discharging cycles, the battery is cooled with a coolant at a temperature in a range of 30° C. to 60° C. This method makes it possible to produce a nickel metal-hydride storage battery at high productivity and low cost.
摘要:
An apparatus for manufacturing a battery electrode from foamed metal electrode material includes first and second rollers which are parallel to each other at a shaft center, and rotatable in directions opposite to each other, and a guide bar which is between the first and second rollers. A method for manufacturing a battery electrode includes supplying a foamed metal electrode material including voids, and having a filled portion filled with active material and an unfilled portion without the active material, and a boundary line between the filled and unfilled portions. Part of the unfilled portion is folded in parallel to the boundary line passing through the unfilled portion, and at right angle against the unfilled portion. A lead welding portion is formed along the direction of the longer side, by applying, to the unfilled bent portion, a force in the direction perpendicular to the filled portion in a way to crush the voids, and compress the bent portion. Preferably, the height of the unfilled portion is compressed to a thickness no more than about the thickness of the filled portion. The lead welding portion formed this way has high density and high mechanical strength. And a battery electrode includes a foamed metal including voids and partly filled with an active material and having a plane surface, and a lead welding portion.
摘要:
The surface of a positive-electrode active material layer or a negative-electrode an active material layer is coated with a gel electrolyte composition to form a gel electrolyte layer. The positive and negative electrodes are laminated such that the gel electrolyte layer is sandwiched. At this time, the gel electrolyte composition is formed into a sol form so as to be applied to the surface of the positive-electrode active material layer or the negative-electrode active material layer. The viscosity of the gel electrolyte composition formed into the sol form is 1 cp to 50 cp. The gel electrolyte composition is formed into the sol form by heating the gel electrolyte composition or diluting the gel electrolyte composition with nonaqueous solvent. When dilution with the nonaqueous solvent is performed, solvent having a high boiling point and solvent having a low boiling point are mixed with each other. After a coating operation has been completed, the solvent having the low boiling point is removed by vaporization. It is effective to heat the positive electrode or the negative electrode when the gel electrolyte composition formed into the sol is applied. Since the gel electrolyte composition formed into the sol form is applied, the electrolytic solution is able to quickly penetrate the active material layer.
摘要:
A method of fabricating a thin, flat dense membrane on a porous substrate in which the green substrate is selected to have a predetermined shrinkage on firing which matches or is greater than the shrinkage of a thin uniformly applied film on firing.
摘要:
A method for manufacturing a prismatic lithium secondary battery having an electrode assembly having a separation film between a positive electrode plate and a negative electrode plate, the method including forming separation films, and positive and negative plates having a narrower width than the separation films, alternately interposing the positive and negative plates between the separation films and stacking the plates and films, hermetically sealing opposite sides of the separation films by heating along a lengthwise direction to form an electrode assembly, and immersing the electrode assembly in an electrolyte solution, putting the assembly into a case, and hermetically sealing the case.
摘要:
A first gas diffusion layer for constructing an anode electrode and a second gas diffusion layer for constructing a cathode electrode are provided with first and second gas flow passages which are formed opposingly to first and second flow passages provided on first and second separators respectively. A fuel gas is supplied to the first flow passage and the first gas flow passage, while an oxygen-containing gas is supplied to the second flow passage and the second gas flow passage. Accordingly, the fuel gas and the oxygen-containing gas are uniformly diffused and supplied to first and second electrode catalyst layers respectively.