Abstract: There is provided a secondary battery where the occurrence of adverse effects due to folds of a continuously folded separator is reduced. A secondary battery includes a plurality of sheet-like positive electrodes, a plurality of sheet-like negative electrodes, and a belt-like separator placed between the positive electrodes and the negative electrodes. The positive electrodes and the negative electrodes are alternately stacked with the separator interposed therebetween. The separator is continuously folded to be interposed between the positive electrodes and the negative electrodes. Folds of the continuously folded separator are at least a specified distance away from ends of the negative electrodes.

Abstract: Provided is a lithium ion secondary battery including a positive electrode which is capable of storing and releasing lithium, a negative electrode which is capable of storing and releasing lithium, and a nonaqueous electrolyte which contains lithium salts and cyclic disulfonic acid ester, in which as the nonaqueous electrolyte, a nonaqueous electrolyte containing a polymer is used, and as at least a part of the lithium salts, imide lithium salts are used. Here, the content of the cyclic sulfonic acid ester is preferably in a range of 2.0% to 5.0% by mass with respect to a total content of the nonaqueous electrolyte. Also, the proportion of the imide lithium salts is preferably in a range of 10 to 50 mol % with respect to a total amount of lithium salts in the nonaqueous electrolyte.

Abstract: A battery pack (2000) includes a secondary battery (2020), a sensor (2040), and a control device (2060). The secondary battery (2020) supplies electric power to a flying object (10). The sensor (2040) outputs a measurement value related to a force applied to the secondary battery (2020) or a periphery of the secondary battery. The control device (2060) has a determination unit (2062). The determination unit (2062) determines a danger level of the secondary battery (2020) based on the measurement value of the sensor (2040).

Abstract: A battery pack includes a plurality of battery cells each including a laminate film casing from which positive and negative electrode lead tabs are led out in a same direction, and a coupling assisting member that includes a conductive plate member fixing portion that fixes a conductive plate member having first and second main surfaces, and first and second slit portions provided on the first and second main surface sides of the conductive plate member, respectively. Either of the positive and negative lead tabs of one battery cell is inserted through the first slit portion and conductively connected to the first main surface. A lead tab of a battery cell adjoining one battery cell and having a polarity different from that of the lead tab of the one battery cell, is inserted through the second slit portion and conductively connected to the second main surface.

Abstract: In an initial state, a battery is in the following state. A laminate has a thickness T0 from a first electrode to a first electrode. A first position is spaced from the end portion of a separator on the first position side by a distance L0 in a direction perpendicular to a thickness direction of the laminate. The end portion of a separator on the first position side protrudes toward the first position from the end portion of the second electrode on the first position side, by a distance G in the direction perpendicular to the thickness direction of the laminate. The laminate is designed such that, even if the laminate swells in the thickness direction of the laminate, the thickness of the laminate from the first electrode to the first electrode is smaller than 4×{(T0/2)2+L02?(L0?G)2}1/2.

Abstract: A secondary battery of the present invention includes at least a positive electrode, a negative electrode, a separation layer that spatially separates the positive electrode and the negative electrode, and an ion conductor that is held between the positive electrode and the negative electrode and has a function of conducting ions between the positive electrode and the negative electrode. In addition, in an initial stage of using the secondary battery, the secondary battery has a characteristic of a potential increase rate of the positive electrode immediately before completion of full charging being smaller than a potential decrease rate of the negative electrode immediately before the completion of full charging and a characteristic of a potential decrease rate of the positive electrode immediately before completion of full discharging being smaller than a potential increase rate of the negative electrode immediately before the completion of full discharging.

Abstract: An electrode for an electrochemical device has a coated portion in which an active material layer is formed on a current collector; a non-coated portion in which the active material layer is not formed; and a resin layer that is laminated such that the coated portion and a portion of the non-coated portion are covered; wherein: the resin layer has a high-permeability portion having high ion permeability and positioned on the coated portion; a low-permeability portion having low ion permeability and positioned on a portion of the non-coated portion; and a transition portion in which ion permeability decreases from the high-permeability portion side toward the low-permeability portion side and positioned between the high-permeability portion and the low-permeability portion.

Abstract: A communication network (3020) is a bus type communication network that communicably connects each battery module (2000). In the battery module (2000), a communication identifier that is used in communication through the communication network (3020) is set. A transmission unit (2020) transmits identifier information to all of the other battery modules (2000) through the communication network (3020). The identifier information indicates a candidate identifier that is a candidate of the communication identifier. A communication arbitration unit (2060) performs communication arbitration for the identifier information transmitted by the transmission unit (2020). In a case of winning in the communication arbitration, a decision unit (2080) decides the candidate identifier indicated in the transmitted identifier information as the communication identifier used by the battery module (2000).

Abstract: An electrochemical device comprising an electrode assembly in which two types of electrodes are stacked or wound with separators interposed therebetween and an outer container that accommodates the electrode assembly; wherein electrode terminals extend to the outside from within the outer container. The films which cover the electrode assembly overlap each other on the outside of the outer peripheral portion of the electrode assembly, and the outer container is formed by bonding the films to each other. The portion of the films that overlap and are bonded to each other comprises a first sealed portion in which the films overlap and are bonded to each other in an overlapping state with the electrode terminals interposed therebetween, and comprises a second sealed portion in which the films are bonded to each other in a directly overlapping state without interposition of the electrode terminals.

Abstract: An electrode (1) for use in a nonaqueous electrolyte secondary cell includes: a current-collecting foil (10); an electrode mixture layer (2) that is formed on a portion of the current-collecting foil (10); and an oxide film (6) provided on the current-collecting foil (10) in at least a region that extends from the boundary (5) between a forming section (3) and a non-forming section (4) of the electrode mixture layer (2) and over a portion of the non-forming section (4).

Abstract: A lithium ion battery (100) of the invention includes a battery main body (10) which includes one or more power generation elements configured by laminating a positive electrode layer, an electrolyte layer, and a negative electrode layer, in this order; an outer package (20) which includes at least a heat-fusion resin layer (21) and a barrier layer (23), and in which the battery main body (10) is sealed; and a pair of electrode terminals (30), each of which is electrically connected to the battery main body (10) and at least a part of which is exposed to the outside of the outer package (20).

Abstract: A positive electrode active material according to the present invention is a positive electrode active material that is used in a positive electrode for a lithium ion secondary battery. This positive electrode active material includes positive electrode active material particles A represented by Formula (A): Li?NixCoyM1(1-x-y)O2 (where 0<??1.15, 0.90<x?0.98, 0<y?0.10, and 0<(1-x-y)), and positive electrode active material particles B represented by Formula (B): Li?NiaCobM2(1-a-b)O2 (where 0<??1.15, 0.70?a?0.90, 0<b?0.20, and 0<(1-a-b)). M1 and M2 each independently represent one element or two or more elements selected from the group consisting of Li, B, Mg, Al, Fe, and Mn.

Abstract: A battery pack (2000) includes a secondary battery (2020), a sensor (2040), and a control device (2060). The secondary battery (2020) supplies electric power to a flying object (10). The sensor (2040) outputs a measurement value related to a force applied to the secondary battery (2020) or a periphery of the secondary battery. The control device (2060) has a determination unit (2062). The determination unit (2062) determines a danger level of the secondary battery (2020) based on the measurement value of the sensor (2040).

Abstract: A first separator (130) covers a first surface of a cathode electrode (110). The first separator (130) has a melting point of a first temperature. A second separator (140) covers a second surface of the cathode electrode (110). The second separator (140) has a melting point of a second temperature higher than the first temperature. An adhesive layer (132) is formed by melting a portion of the first separator (130). The adhesive layer (132) pastes the first separator (130) and the second separator (140) to each other.

Abstract: A first lead terminal (210) has a first end (212) and a second end (214). The second end (214) is opposite to the first end (212). The first lead terminal (210) is positioned such that the first end (212) of the first lead terminal (210) faces a first side surface (104a) of a laminated body (100). The second end (214) of the first lead terminal (210) projects obliquely with respect to the first side surface (104a) of the laminated body (100). The first lead terminal (210) has a bent portion (C) along a longitudinal direction of the first lead terminal (210) between the first end (212) and the second end (214), more specifically, outside an exterior material (140).

Abstract: An information processing apparatus (2000) detects a battery cell in which an abnormality (for example, leakage) occurs among a plurality of battery cells connected in series. A first differential voltage acquisition unit (2020) acquires a first differential voltage for each of the plurality of battery cells. The first differential voltage of the battery cell is a difference between a voltage of the battery cell after charging is completed and a voltage of the battery cell at a time when an operation is performed for a predetermined time after charging is completed. A determination unit (2040) determining that an abnormality occurs in a first battery cell, in a case where a difference between the first differential voltage of the first battery cell and the first differential voltage of a battery cell having a next largest first differential voltage of the first battery cell, is greater than or equal to a first predetermined value.

Abstract: A first communication network (3020) communicably connects each battery module (2000). A second communication network (3040) is configured in a linear topology. Each battery module (2000) can communicate with another battery module (2000) adjacent on the second communication network (3040). An identifier information transmission unit (2020) transmits identifier information to all of the other battery modules (2000) through the first communication network (3020). An identifier information reception unit (2040) receives the identifier information through the first communication network (3020). A first notification execution unit (2060) performs first notification through the second communication network (3040). A first notification detection unit (2080) detects the first notification through the second communication network (3040). A determination unit (2100) determines whether or not a first identifier of the battery module (2000) is a duplicate of the first identifier of the other battery module (2000).

Abstract: Provided with a negative electrode for a secondary battery comprising an anode active material that is a mixture of an amorphous carbon-coated graphite active material A having a density of 1.50 g/cm3 or less in press pelletizing at 2 kN/cm2 and a carbon-based active material B having a density of 1.65 g/cm3 or higher in press pelletizing at 2 kN/cm2 in a weight ratio of 90:10 to 99:1 as A:B, so that the cracking of amorphous carbon-coated graphite is suppressed and high-temperature life characteristics is improved.

Abstract: Provided is a current collector electrode sheet (10) including a slurry application area (11) formed by intermittently applying and drying a slurry containing an active material and a non-application area (12), on both surfaces of a metal foil (9), in which the application area (11) and the non-application area (12) are alternately formed in a winding direction of the metal foil (9) having a strip shape, and, in a compression step of continuously compressing the slurry application area (11) and the non-application area (12) using a pair of compression rollers in a thickness direction of the current collector electrode sheet (10), an area which is not compressed by the compression rollers, is present in a tailing portion (14) at a terminal end (13) of each application area (11).

Abstract: A positive electrode active material of the present invention is used for a positive electrode for a lithium-ion secondary battery and includes a positive electrode active material particle A expressed by General Formula (A): Li?NixCoyMn(1?x?y)O2 (where 0<??1.15, 0.7?x?0.9, 0<y?0.2, and 0<(1?x?y)); and one kind or two or more kinds of positive electrode active material particles B selected from a positive electrode active material particle B1 expressed by General Formula (B1): Li?NiaCobAl(1?a?b)O2 (where 0<??1.15, 0.7?a?0.9, 0<b?0.2, and 0<(1?a?b)), a positive electrode active material particle B2 expressed by General Formula (B2): Li?NiaCobMn(1?a?b)O2 (where 0<??1.15, 0.2?a?0.6, 0<b?0.8, and 0<(1?a?b)), a positive electrode active material particle B3 expressed by General Formula (B3): Li?+?Mn(2?a??)MeaO4 (where 0<??1.0, 0???0.3, 0?a?0.