摘要:
A method for preparing an electrode component comprises mixing an electrode active material in a water-based environment with the aid of surfactants. A preferred embodiment of this process comprises combining a high surface area carbonaceous cathode active material (10) with a water/surfactant mixture (14) and then adding a fluoro-polymer as the binder material to the slurry. The resulting paste (16) is processed and formed into the cathode material. This process replaces the use of isopropyl alcohol with the water/surfactant mixture as the solvent. Preferred surfactants include those of the polyglycol family.
摘要:
A cell including a cathode having a second cathode active material of a relatively high energy density but of a relatively low rate capability sandwiched between two current collectors and with a first cathode active material having a relatively low energy density but of a relatively high rate capability in contact with the opposite sides of the current collectors, is described. In this type of cell construction, it is important that the weight ratio of the first and second cathode active materials is within a strict tolerance. Further, it is important to be able to track and record this information, as well as other data, for each cell built in a production facility. Marking the current collectors and the cell casing with identifying I.D. matrixes that are read and recorded during cell manufacture does this.
摘要:
A means for attaching a thin terminal extension (62) to a glass sealed terminal electrode (20) utilizing the least amount of space and total height. The terminal extension is of sufficient width to allow a hole sized to the diameter of the pin and the pin is received in the opening in the terminal extension. A series of spot welds are made along the perimeter of the pin at the interface with the terminal extension. If necessary, an insulator (60) is placed between the terminal extension and the surface of the battery case to prevent electrical shorting to the case. Hence, the total height of the assembly is the sum of the thickness of the insulator plus the terminal extension. This design can apply to terminations made externally to or internally in the electrochemical cell.
摘要:
A header for an electrochemical cell is described. The header provides a boss for the terminal ferrule, a shield portion for the fill ferrule, and at least one boss disposed intermediate the terminal boss and shield portion to provide for alignment of the electrode assembly inside the case.
摘要:
A casing (12) having substantially parallel side walls (14,16) connected by a curved end wall receives a cathode electrode having substantially parallel opposed side walls connected by end walls. The cathode electrode (34) is enclosed by a separator envelope (44) that substantially conforms to an upper surface of the electrode. In contrast, the separator envelope has excess material at least at the opposite end. Accordingly, along the perimeter of the electrode the separator has a nonuniform spacing with respect to the edges of the electrode. The upper surface of the separator is disposed in a relatively closely spaced relationship with the electrode proximate the header and lid (24) where welding takes place. At the opposite end of the cathode electrode there is space inside the casing that provides for electrode swelling. Since no welding operations take place there, the separator is provided in a relatively loose relationship with respect to the cathode to accommodate swelling during discharge.
摘要:
The present invention is directed to a header assembly attachable to a medical device for the purpose of connecting its output terminals to at least one lead, the lead terminating at a target organ or portion of the body intending to be assisted. A number of leads are connectable to the header, including single and coaxial leads. The header assembly may be molded directly to the medical device or preformed and then attached to the device casing, either by mechanical fastener and/or chemical adhesive.
摘要:
The present invention improves the performance of lithium electrochemical cells by providing a new electrode assembly based on a sandwich cathode design, but termed a double screen sandwich cathode electrode design (60). In particular, the present invention uses sandwich cathode electrodes (64) which are, in turn, sandwiched between two half double screen sandwich cathode electrodes (80), either in a prismatic plate or serpentine-like electrode assembly. In a jellyroll electrode assembly, the cell is provided in a case-positive design and the outside round of the electrode assembly is a half double screen sandwich cathode electrode.
摘要:
This invention is directed to a novel solid polymer electrolyte more particularly thin film terpolymer networks are disclosed that are highly conductive at ambient temperatures. This solid polymer electrolyte can be produced as a thin film (14) that results from the polymerization of three selected monomers together with a lithium salt and plasticizers. The resulting solid polymer electrolyte does have excellent mechanical properties and ionic conductivity at ambient temperatures and can be used in the fabrication of a solid state battery and other solid state electrochemical devices such as supercapacitors, fuel cells, sensors, electrochromic devices or the like.