Abstract: A battery assembly may include a battery and a battery housing. The battery may include an electrolyte vent to provide a pressurized electrolyte discharge during an electrolyte discharge event. The battery housing may contain the battery and may include an electrolyte control member to dissipate energy from and inhibit dispersion of the pressurized electrolyte discharge from the electrolyte vent during the electrolyte discharge event.

Abstract: A battery assembly may include a battery and a battery housing. The battery may include an electrolyte vent to provide a pressurized electrolyte discharge during an electrolyte discharge event. The battery housing may contain the battery and may include an electrolyte control member to dissipate energy from and inhibit dispersion of the pressurized electrolyte discharge from the electrolyte vent during the electrolyte discharge event.

Abstract: A method of sealing a planar battery having a sachet-type packaging to thereby reduce unused volume in a headspace portion is provided. A headspace seal flange is folded at an acute angle at about the middle of the flange. The headspace seal flange may be folded about in half and upon itself, with the folded headspace seal flange adjacent to a top of the planar battery.

Abstract: A method of packaging a lithium ion battery using compound folding to seal the battery and thereby provide a more compact design that also reduces vibration caused by mechanical shocks is provided. A compound fold is made along the edge of the battery packaging to seal a cell therein. The compound fold extends generally from a centerline of the cell between a top and bottom surface of the cell. Different shapes of compound folds may be provided.

Abstract: A method for activating electrochemical cells including the steps of sealing the electrochemical cells in a container with an activating electrolyte solvent and salt, treatment steps, such as the application of compression and decompression cycles to the container, for providing good distribution of the electrolyte within the electrochemical cells.

Abstract: A method for producing a battery cell having a plurality of film layers, a plurality of current collector layers, and at least one separator layer, with each current collector layer including a predetermined lead portion. The method includes the steps of providing at least one notch in each layer, and stacking the layers with the notches positioned with respect to one another to expose the predetermined lead portion of each current collector layer. A battery cell including an electrode having an area defined by a perimeter including an edge, a counter electrode having an area defined by a perimeter including an edge, and a separator having an area defined by a perimeter including an edge is also provided. The separator is sandwiched between the electrode and the counter electrode in a layered relationship with at least portions of the edges being continuous.

Abstract: A battery apparatus includes an anode terminal and a cathode terminal at least one of which includes a conductive extension extending through and contacting insulative housing material. The extension includes at least one outer rough surface characterized by a plurality of surface nodules at least a majority of which are at least 5 microns in height and have a maximum linear cross dimension of at least 20 microns and which contact and bond with the enveloping electrically insulative housing material. The battery apparatus can include a plurality of bicells. A method of forming a battery apparatus includes brushing an outer surface of at least one of an anode terminal material or a cathode terminal material effective to roughen the outer surface from what it was prior to the brushing. The anode and cathode assembly are enveloped in a housing comprising electrically insulative material with at least the one terminal material projecting therefrom.

Abstract: The invention provides a battery cell including an electrode having an area defined by a perimeter including an edge, a counter electrode having an area defined by a perimeter including an edge, and a separator having an area defined by a perimeter including an edge. The separator is sandwiched between the electrode and the counter electrode in a layered relationship with at least portions of the edges being contiguous. The separator and one of the electrode and the counter electrode each include a first notch in the edge exposing a portion of the other of the electrode and counter electrode. The separator and the other of the electrode and the counter electrode each include a second notch in the edge exposing a portion of the one of the electrode and the counter electrode. A method of producing a battery cell having a plurality of film layers, a plurality of current collector layers, and at least one separator layer, with each current collector layer including a predetermined lead portion, is also provided.

Abstract: The invention provides a battery cell including an electrode having an area defined by a perimeter including an edge, a counter electrode having an area defined by a perimeter including an edge, and a separator having an area defined by a perimeter including an edge. The separator is sandwiched between the electrode and the counter electrode in a layered relationship with at least portions of the edges being contiguous. The separator and one of the electrode and the counter electrode each include a first notch in the edge exposing a portion of the other of the electrode and counter electrode. The separator and the other of the electrode and the counter electrode each include a second notch in the edge exposing a portion of the one of the electrode and the counter electrode.