An electronic device including a protected component, a flexible positive temperature coefficient (PTC) device including a flexible sheet of PTC material coupled to a surface of the protected component, the flexible PTC device electrically connected to the protected component and adapted to arrest or mitigate electrical current flowing through the protected component upon the occurrence of an overcurrent condition, and a battery management system coupled to the flexible PTC device, the battery management system configured to measure a voltage across the flexible PTC device and to arrest or mitigate electrical current in the electronic device if the measured voltage across the flexible PTC device exceeds a predetermined threshold.

A cylindrical battery according to an aspect of the present invention includes an electrode assembly including a positive electrode plate and a negative electrode plate wound together via a separator, an electrolytic solution, a bottomed cylindrical housing can, and a sealing unit fixed by crimping of an open end of the housing can via a gasket. The sealing unit includes a valve member having a circular outline, a metal plate connected to a central portion of the valve member so as to be farther inside the battery than the valve member, and an annular insulating member disposed between an outer peripheral portion of the valve member and an outer peripheral portion of the metal plate. The valve member has a sloping region in which the thickness decreases or increases continuously along the radial direction.

The present invention relates to a cap assembly for a secondary battery mounted on an opening of a can. The cap assembly comprises: a top cap; a safety element disposed on a lower portion of the top cap; a safety vent disposed on a lower portion of the safety element; and a gasket surrounding edges of the top cap, the safety element, and the safety vent and mounted on the opening of the can, wherein an impact absorption part absorbing an impact from the gasket is disposed between an inner wall of the gasket and an outer circumferential surface of the safety vent.

In accordance with some embodiments, a battery includes a cell and a thermistor coupled to a monitor line and a switch. The monitor line is operable to send signals to the communications device or battery corresponding to a temperature of at least a portion of the battery. A data line is coupled to a decoder. The decoder is coupled to the switch, wherein the decoder is operable to activate the switch, thereby interrupting the thermistor. In accordance with some embodiments, a method includes receiving a fault signal at a data line of the battery, the fault signal indicating that at least a first cell of the communications device battery has been compromised. The method includes interrupting a thermistor by activating a switch coupled to a decoder coupled to the data line, thereby simulating that the temperature of at least a portion of the battery has reached an outer limit.

Disclosed herein is a method of manufacturing a secondary battery electrode containing a positive temperature coefficient (PTC) material, the method including (a) applying first slurry including a first mixture and a solvent mixed with each other to one surface of a planar current collector to generate a PTC material after drying, (b) applying second slurry including a second mixture, including an electrode active material, and a solvent mixed with each other to the first slurry applied to the current collector, which is in a non-dried state, and (c) drying the first slurry and the second slurry applied to the current collector.

The embodiment of the present application relates to the field of Li-ion battery and, in particular, to a secondary battery. The secondary battery includes a cell, a safety component fixed on the cell and thermal conductive adhesive provided between the cell and the safety component, the thermal conductive adhesive contains at least one of hot melt adhesive, silica gel binder or epoxy resin binder, and thermal conductive filling material. The thermal conductive adhesive in the secondary battery performs good thermal conductivity and adhering property, which can stably adhere the safety component with the cell, meanwhile transferring, via the thermal conductive adhesive, heat of the cell to the safety component rapidly, so that the safety component cuts off the circuit to protect the cell during overcharge, thereby avoid situations that the thermal conductive adhesive is separated from the cell due to cell inflation and deformation.

Various three-dimensional battery structures are disclosed, in certain embodiments comprising a battery enclosure and a first plurality of electrodes within the enclosure. The first plurality of electrodes includes a plurality of cathodes and a plurality of anodes. The first plurality of electrodes includes a second plurality of electrodes selected from the first plurality of electrodes. The three-dimensional battery includes a first structural layer within the battery enclosure. Each of the second plurality of electrodes protrudes from the first structural layer. The three-dimensional battery includes a plurality of electrical current-reducing devices within the enclosure. Each of the second plurality of electrodes is coupled to one of the plurality of current-reducing devices.

An electrode assembly according to an exemplary embodiment of the present invention includes a cathode plate and an anode plate; a separator disposed between the cathode plate and the anode plate; and coating layers disposed between the separator and the cathode plate and between the separator and the anode plate. The separator includes a first portion that is covered with the coating layer, and a second portion that exposes a surface facing the cathode plate and a surface facing the anode plate, and at least one of the cathode plate and the anode plate includes a positive temperature coefficient (PTC) material.

A battery (10) for an electric vehicle comprises a plurality of battery cells (11), where a first group (12) comprises a plurality of battery cells (11) connected to each other in parallel, a second group (13) comprises a plurality of battery cells (11) connected to each other in parallel, and the first group (12) and the second group (13) are connected with each other in series forming a first line (14) of battery cells (11). The battery (10) further comprises a first terminal (16) which is configured to be connected with an electric machine (30) and with a power net (31) of the electric vehicle, and a second terminal (17) which is configured to be connected with a reference potential (32). The battery (10) is configured to supply the electric machine (30) and the power net (31) of the electric vehicle with power, and the electric machine (30) and the power net (31) are supplied with the same voltage level by the battery (10).

Energy storage devices, battery cells, and batteries of the present technology may include an enclosure. The enclosure may house a cathode current collector and a cathode tab coupled with the cathode current collector. A cathode terminal may be accessible at an external location of these devices, and the cathode terminal may be electrically coupled with the cathode tab. The enclosure may also house an anode current collector and an anode tab coupled with the anode current collector. An anode terminal may be accessible at an external location of the devices, and the anode terminal may be electrically coupled with the anode tab. The devices may further include a fuse housed within the enclosure. The fuse may be positioned between the anode terminal and anode tab, and may also be in electrical communication with both the anode terminal and the anode tab.