Abstract: An electronic device and battery included therein are disclosed. The device includes a battery which itself comprises a jelly-roll structure having a rolled stack of a cathode, a separator, and an anode; an outer cover layer enclosing surfaces of the jelly-roll; and a pouch sealing the jelly-roll and the outer cover layer. The jelly-roll includes a first surface, a second surface disposed in a opposite direction, a third surface corresponding to one side of the rolled stack and connecting the first surface and the second surface, and a fourth surface corresponding to other side of the rolled stack, connecting the first surface and the second surface, and disposed in a direction opposite to the third surface. The outer cover layer includes a first portion, a second portion, a third portion, and a fourth portion bonded to first, second, third and fourth surfaces, respectively.

Abstract: The invention relates to a method for producing an electrode stack for a battery cell, comprising the following steps: providing a strip-shaped anode element (45) comprising an anodic current discharger (31) to which an anodic active material (41) is applied; providing a strip-shaped cathode element (46) comprising a cathodic current discharger (32) to which a cathodic active material (42) is applied; providing at least one strip-shaped separator element (16); introducing grooves (70) into the cathodic active material (42) around segmentation lines (S); generating a strip-shaped composite element (50) by applying the cathode element (46) onto the anode element (45), with the interposition of the at least one separator element (16); cutting the composite element (50) into plate-shaped composite segments at the segmentation lines (S); and stacking the composite segments.

Abstract: A management server obtains information on a use history of a battery assembly used in a vehicle. The management server calculates an amount of material deterioration Dm and an amount of high-rate deterioration Dh by using the information on the use history of the battery assembly. When a ratio Dm/Dh is higher than a threshold value Th, the management server generates first assembly information indicating selection of a cell highly resistant against material deterioration and a spacer highly resistant against material deterioration (a cell A and a spacer A). When the ratio Dm/Dh is lower than the threshold value Th, the management server generates second assembly information indicating selection of a cell highly resistant against high-rate deterioration and a spacer highly resistant against high-rate deterioration (a cell B and a spacer B).

Abstract: An electrolyte solution for electrochemical device contains: an electrolyte solution comprising a cyclic carbonate solvent containing 1.0 mol/L to 1.6 mol/L of LiPF6 as an electrolyte; an oxalate complex salt of lithium whose additive quantity relative to the electrolyte solution accounts for 1.0 percent by weight to 3.0 percent by weight; and a straight-chain carbonate whose additive quantity relative to the electrolyte solution accounts for 1.0 percent by weight to 9.0 percent by weight.

Abstract: A secondary battery includes: a battery element; a casing which accommodates the battery element; a positive electrode terminal and a negative electrode terminal provided to the casing and electrically connected to the battery element; and a cut-off portion which switches from a grounded state in which the casing and one terminal of the positive electrode terminal and the negative electrode terminal have an identical potential, to a cut-off state in which the casing and the one terminal are electrically cut off. The one terminal has a facing portion which faces the casing, and the cut-off portion is arranged between the facing portion and the casing. When the casing is externally short-circuited, the cut-off portion switches from the grounded state to the cut-off state by being deformed by heat generated as a short-circuit current flows.

Abstract: The present invention relates to an electrode assembly including at least two electrode plates and a separator interposed between the electrode plates, wherein indented portions are formed from lower ends of opposite sides of the electrode tab in an opposite direction to an externally extending direction of the electrode tab in a side of the electrode body in which the electrode tab externally extends, in the electrode plates.

Abstract: A method of forming slurry for a positive electrode plate is provided, which includes reacting maleimide compound and barbituric acid to form a hyper branched polymer. 0.1 to 1 part by weight of the hyper branched polymer is mixed with 0.01 to 1 part by weight of coupling agent and 0.1 to 6 parts by weight of carbon nanotube to form a mixture. 80 to 97.79 parts by weight of active material is added to the mixture, wherein the hyper branched polymer, the carbon nanotube, and the active material are bonded by the coupling agent.