A battery module having first and second cylindrical battery cells, each of the first and second cylindrical battery cells having a negative electrode terminal and a positive electrode terminal, a metal plate configured to connect, in series, the first cylindrical battery cell and the second cylindrical battery cell, a shrinkable tube in which the first and second cylindrical battery cells are mounted, first and second PTC elements respectively provided to the first and second cylindrical battery cells, first insulating members provided between the first and second PTC elements and the shrinkable tube, second insulating members respectively provided between the first and second PTC elements and the first and second cylindrical battery cells, insulating sheets respectively configured to seal an upper surface and a lower surface of the shrinkable tube, and a connection part protruding outward from the shrinkable tube and configured to connect the first and second cylindrical battery cells to an external electronic apparatus in provided.

The embodiment of the present application relates to the field of Li-ion battery and, in particular, to a thermal conductive adhesive and a secondary battery containing the thermal conductive adhesive. The thermal conductive adhesive is prepared through adding thermal conductive filling material in the hot melt adhesive system, which performs good thermal conductivity and adhering property, and 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; the thermal conductive adhesive has high initial viscosity, which increases good contact between the protection device and the cell through the adhesion, thereby reduces situations that the thermal conductive adhesive is separated from the cell due to inflation and deformation of the cell.

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.

Disclosed is a stacked battery including at least one short-circuit current shunt part and electric elements, wherein: the shunt part includes first and second current collector layers, and an insulating layer provided between the first and second current collector layers, all of these layers being stacked; each power generation element includes a cathode current collector layer, a cathode material layer, an electrolyte layer, an anode material layer, and an anode current collector layer all of these layers being stacked; the first current collector layer is electrically connected to the cathode current collector layer and the second current collector layer to the anode current collector layer; the electric elements are electrically connected in parallel; and the shunt part next to the electric elements includes a PPTC layer between the first current collector layer and the insulating layer and/or between the second current collector layer and the insulating layer.

The present invention relates to a positive electrode plate and an electrochemical device. The positive electrode plate comprises a current collector, a positive active material layer and a safety coating disposed between the current collector and the positive active material layer, wherein the safety coating comprises a polymer matrix, a conductive material and an inorganic filler, wherein the polymer matrix comprises at least two types of polymer materials, and the first type of polymer material is fluorinated polyolefin and/or chlorinated polyolefin, and the solubility of the second type of polymer material in oil solvent is smaller than the solubility of the first type of polymer material; and the weight percentage of the first type of polymer material relative to the total weight of the polymer matrix, the conductive material and the inorganic filler is 17.5% or more. The positive electrode plate improves high temperature safety of electrochemical device.

The present invention relates to a positive electrode plate and an electrochemical device. The positive electrode plate comprises a current collector, a positive active material layer and a safety coating disposed between the current collector and the positive active material layer, and wherein the safety coating comprises a polymer matrix, a conductive material and an inorganic filler and wherein when the safety coating and the positive active material layer are collectively referred as a film layer, the film layer has an elongation of 30% or more. The positive electrode plate may improve the safety performance during nail penetration of the electrochemical device such as capacitor, primary battery or secondary battery and the like.

An externally-attached PTC element attachable to one electrode terminal of a tubular battery with electrode terminals on both end surfaces, the externally-attached PTC element including: a bottom plate made of a metal plate; a plate-shaped PTC element; and a top panel made of a metal plate, the plate-shaped PTC element and the top panel being stacked in that order above the bottom plate disposed below, the PTC element being disposed in an opposed area between the top panel and the bottom plate, the top panel projecting and extending in one direction with respect to a planar area of the bottom plate, the top panel having a distal end formed into a lead terminal shape mountable to a circuit board.

A battery and related methods are described. The battery can include a plurality of battery cell segments. Each of the battery cell segments can include: a positive temperature coefficient (PTC) material whose resistance increases with temperature, an anode segment, a cathode segment, and one or more current limiters. The one or more current limiters of a battery cell segment are configured to conditionally electrically isolate the battery cell segment based on an occurrence of a short circuit within the battery cell segment. The battery can be used to store electrical power and/or provide electrical power to a load.

A breaker 1 includes a fixed piece 2 having a fixed contact 21, a movable piece 4 including a movable contact 41 and having the movable contact 41 so as to be pressed against and in contact with the fixed contact 21, a thermally actuated element 5 shifting the movable piece 4 from a conductive state to a cut-off state in accordance with a temperature change, and a case 7 accommodating the fixed piece 2, the movable piece 4, and the thermally actuated element 5. The case 7 includes a case main body 71 accommodating the movable piece 4 and the thermally actuated element 5, a lid member 81 covering a housing concave portion 73 of the case main body 71, and a metal plate 9 embedded in the lid member 81. Heat capacity of the metal plate 9 is larger than heat capacity of the fixed piece 2.

A battery wiring module is attached to a cell group including an arrangement of a plurality of cells having positive pole and negative pole electrode terminals. The battery wiring module is provided with: a plurality of connection members connecting the positive pole and negative pole electrode terminals of adjacent cells of the plurality of cells; and a flexible printed board including a plurality of voltage sensing wires for sensing voltages of the plurality of cells via the plurality of connection members. Each of the voltage sensing wires has an electric current limiting element provided somewhere therealong to limit a flow of overcurrent in the voltage sensing wires. The electric current limiting element is connected to the voltage sensing wires at a portion which is overcoated with an insulating resin.