Abstract:
A bypass apparatus and method for series connected energy storage devices. Each of the energy storage devices coupled to a common series connection has an associated bypass unit connected thereto in parallel. A current bypass unit includes a sensor which is coupled in parallel with an associated energy storage device or cell and senses an energy parameter indicative of an energy state of the cell, such as cell voltage. A bypass switch is coupled in parallel with the energy storage cell and operable between a non-activated state and an activated state. The bypass switch, when in the non-activated state, is substantially non-conductive with respect to current passing through the energy storage cell and, when in the activated state, provides a bypass current path for passing current to the series connection so as to bypass the associated cell. A controller controls activation of the bypass switch in response to the voltage of the cell deviating from a pre-established voltage setpoint. The controller may be included within the bypass unit or be disposed on a control platform external to the bypass unit. The bypass switch may, when activated, establish a permanent or a temporary bypass current path.
Abstract:
A bypass apparatus and method for series connected energy storage devices. Each of the energy storage devices coupled to a common series connection has an associated bypass unit connected thereto in parallel. A current bypass unit includes a sensor which is coupled in parallel with an associated energy storage device or cell and senses an energy parameter indicative of an energy state of the cell, such as cell voltage. A bypass switch is coupled in parallel with the energy storage cell and operable between a non-activated state and an activated state. The bypass switch, when in the non-activated state, is substantially non-conductive with respect to current passing through the energy storage cell and, when in the activated state, provides a bypass current path for passing current to the series connection so as to bypass the associated cell. A controller controls activation of the bypass switch in response to the voltage of the cell deviating from a pre-established voltage setpoint. The controller may be included within the bypass unit or be disposed on a control platform external to the bypass unit. The bypass switch may, when activated, establish a permanent or a temporary bypass current path.
Abstract:
A battery pack (10) including at least one battery cell (26) and a circuit carrier (30) in proximity to said at least one battery cell. Disposed in said battery pack, is a fuse (50) which is formed from an electrically conductive resilient material adapted to work as the fuse. The electrically conductive resilient material further is encapsulated with a material adapted to promote resistance to breakage due to shocks, bumping or droppage of battery packs into which the fuse is incorporated. When the temperature of the at least two battery cells reaches a predetermined trip point, the fuse releases from at least one of said batteries, due to the heat transfer from said at least one battery cell, thereby electrically disconnecting the at least one battery cell from adjacent battery cells.
Abstract:
Charge rates of individual battery cells are equalized and battery safety increased by limiting the amount of current that will flow through the battery in the event of a short circuit either external to or internal to the battery. A solid-polymer battery having a cathode (23) layer, an anodic (27) layer, an ionically conductive polymeric electrolyte situated intermediate the cathodic (23) layer and the anodic (27) layer, a first electrode electrically connected to the cathodic (23) layer, and a second electrode electrically connected to the anodic (27) layer, has additionally an electronically conductive polymeric layer situated intermediate the first and second electrodes and having a resistivity within a range so as to limit current flow-through the battery in case of the occurence of a short circuit between the cathodic (23) layer and the anodic (27) layer, and to reduce a terminal voltage of the battery no more than few percent as compared to what the terminal voltage of the battery would be within the electronically conductive polymeric layer.
Abstract:
Disclosed is a stable and environmentally compatible explosion-safe electrolyte for use in a galvanic cell, in particular in a lithium cell. The electrolyte contains salts of the composition ABL2, in which A is lithium or a quaternary ammonium ion, B is boron and L is a bidentate ligand which is bound to the central boron atom via two oxygen atoms. Described are the production and the electrochemical properties of several compounds of this type.
Abstract:
The diaphragm for a cell can reliably ensure safety by causing the cell to lose the function when the temperature abnormally rises due to external short-circuit or the like. The cell comprises positive and negative electrodes, and a diaphragm. The diaphragm comprises polymer porous body which is hydrophilized, and polymer grains whose fusion point is 80 to 170 DEG C, and which include grains of ethylene copolymer having side chains. The polymeric grains are carried by the polymerically porous body.
Abstract:
This invention relates to a heat sensitive polymer film and to a method for making the same. The film becomes substantially impermeable to air or ion flow above a predetermined temperature and is useful as a separator in electrochemical cells. The film comprises a microporous layer coated on at least one side with a layer of heat-fusible polymer particles.
Abstract:
A pouch-type electrochemical battery comprising at least one electrochemical battery cell encapsulated within a housing material comprising an inorganic platelet composition.
Abstract:
The invention regards a battery (1) comprising at least one battery cell (2), at least one discharging device (3) for discharging the battery cell (2), and a pouch (4) containing the battery cell (2) and the discharging device (3), wherein the pouch (4) comprises a first compartment (5) and a second compartment (6), and wherein the battery cell (2) is provided in the first compartment (5) and the discharging device (3) is provided in the second compartment (6).
Abstract:
A vehicle has a body forming a passenger compartment. The vehicle also has a chassis supporting the body. The chassis includes a frame structure having a pair of side rails running longitudinally along the body, a plurality of rigid cross rails extending perpendicular to the side rails and attached at opposing ends to the side rails, and at least one bay defined between the plurality of cross rails. The vehicle also has a battery system including a battery pack. The battery pack has a plurality of electrical storage devices. The battery pack is secured to the side rails and removably positioned in the at least one bay.