Abstract: An output control method for a secondary battery includes: calculating a variation indication amount that correlates with a magnitude of variation between charge and discharge characteristics of the plurality of cells, based on a charge and discharge characteristic indication amount that changes according to change in the charge and discharge characteristic; determining that the variation occurs when the variation indication amount is equal to or larger than a predetermined determination reference value; and setting the available output power based on a determination result that the variation occurs. In the available output power setting step, when the variation does not occur, a basic available output power determined based on the charge and discharge characteristic indication amount is set as the available output power. When the variation occurs, a corrected available output power having a value lower than that of the basic available output power is set as the available output power.

Abstract: An in-vehicle battery system comprises: a battery; a relay for establishing or cutting off an electrical connection between the battery and an inverter; a plurality of switches respectively provided in a current path for switching the relay; and a battery control apparatus that supervises a status of the battery. The plurality of switches include a first switch provided in the battery control apparatus and a second switch provided in a vehicle control apparatus which controls traveling of the vehicle; the first switch and the second switch are serially connected to each other in the current path; the battery control apparatus controls a status of switching the first switch; and the vehicle control apparatus controls a status of switching the second switch.

Abstract: A battery pack cooling system includes a plurality of cells disposed in an internal space of a battery pack case so as to form a cooling passage configured to cool the cell modules by cooling air flowing in the cooling passage. The cooling passage includes a cooling air inlet passage, a cooling air exhaust passage, and a plurality of cooling branch passages disposed to connect the cooling air inlet passage and the cooling air exhaust passage in parallel. A minimum temperature sensor is disposed in the upstream position to measure a lowest temperature region in a first cell module. A maximum temperature sensor is disposed in the downstream position which becomes a highest temperature region in the first cell module. Another temperature sensor is disposed in a second cell module to measure the temperature of either the highest temperature or the lowest temperature in the second cell module.

Abstract: There is provided a highly heat conductive piston ring for an internal combustion engine capable of exhibiting a gas seal function and a heat transfer function for a long period of time in a stable manner when used in an automobile gasoline engine having a high compression ratio. The highly heat conductive piston ring for an internal combustion engine is a piston ring for an internal combustion engine having an Mn—Cr steel as a base material, the Mn—Cr steel including C in the range of from 0.52 to 0.65 mass %, Si in the range of from 0.15 to 0.35 mass %, Mn in the range of from 0.60 to 1.00 mass %, Cr in the range of from 0.60 to 1.00 mass %, P in the range of 0.04 mass % or less, S in the range of 0.04 mass % or less, a slight amount of components (total content of Al, Ni, and Cu) in the range of from 0.05 to 3.0 mass %, and a remnant being Fe and unavoidable impurities.

Abstract: A vehicle power supply system is provided for an electric vehicle. The vehicle power supply system has a first relay and a second relay, which are two-contact movable relays that connect/disconnect a high voltage circuit. The first relay has a first movable contact that is arranged to move with respect to a first fixed contact in a first direction when connecting/disconnecting. The second relay has a second movable contact is arranged to move with respect to a second fixed contact in a second direction when connecting/disconnecting. The second direction is opposite to the first direction. One of the first and second relays is oriented such that its movable contact separates from its fixed contact in a direction in which the greatest acceleration input is applied at the time of a collision.

Abstract: A battery pack cooling system includes a plurality of cells disposed in an internal space of a battery pack case so as to form a cooling passage configured to cool the cell modules by cooling air flowing in the cooling passage. The cooling passage includes a cooling air inlet passage, a cooling air exhaust passage, and a plurality of cooling branch passages disposed to connect the cooling air inlet passage and the cooling air exhaust passage in parallel. A minimum temperature sensor is disposed in the upstream position to measure a lowest temperature region in a first cell module. A maximum temperature sensor is disposed in the downstream position which becomes a highest temperature region in the first cell module. Another temperature sensor is disposed in a second cell module to measure the temperature of either the highest temperature or the lowest temperature in the second cell module.

Abstract: A battery pack cooling system includes a plurality of cells disposed in an internal space of a battery pack case so as to form a cooling passage configured to cool the cell modules by cooling air flowing in the cooling passage. A first temperature sensor is a minimum temperature sensor disposed in the upstream position which becomes a lowest temperature. A second temperature sensor is a maximum temperature sensor disposed in the downstream position which becomes a highest temperature. A third temperature sensor is configured to measure the temperature of either the highest temperature or the lowest temperature disposed in a second cell module. A cooling passage includes a cooling air inlet passage, a cooling air exhaust passage, and a plurality of cooling branch passages disposed to connect the cooling air inlet passage and the cooling air exhaust passage in parallel.

Abstract: An electricity storage device including: plural electricity storage modules, each including an electricity storage module case, plural electricity storage cells housed in the electricity storage module case, and external terminals; an electricity storage case in which the plurality of electricity storage modules are arranged and housed; plural wire harnesses connected to the external terminals of the electricity storage modules; and a vibration damping material provided in a space region between one surface of the electricity storage case and, among the plurality of wire harnesses, at least a wire harness including the longest length extending in an arrangement direction of the electricity storage modules, wherein the wire harness including the longest length extending in the arrangement direction of the electricity storage modules is biased toward a side of the electricity storage module case by the one surface of the electricity storage case, through the vibration damping material.

Abstract: A battery cooling structure has a plurality of cooling passages that are formed on a surface of a cover plate attachable to a battery pack and that are for taking in cooling air into the battery pack, and a connection passage that is formed in a direction intersecting with the plurality of cooling passages on the surface of the cover plate, and that connects the plurality of cooling passages with one another to allow interchange of the cooling air. The battery pack is arranged in a center console box between a driver seat and a front passenger seat of a vehicle. The cover plate is attached to a side surface of the battery pack. The plurality of cooling passages extend in parallel with one another and in a direction vertical to a floor surface. Partial portions of the cooling passages on a floor surface side are open.

Abstract: A battery control system connected to a battery, which controls charge/discharge at the battery, includes: a current detection unit that measures a current value by detecting a charge/discharge current flowing through the battery; a voltage detection unit that detects a voltage at the battery; a temperature detection unit that detects a temperature at the battery; a temperature history recording unit that records temperature history pertaining to the temperature detected by the temperature detection unit; and a charge/discharge restriction unit that restricts the charge/discharge current in a low-temperature state based upon the temperature history recorded by the temperature history recording unit.

Abstract: A battery control system connected to a battery, which controls charge/discharge at the battery, includes: a current detection unit that measures a current value by detecting a charge/discharge current flowing through the battery; a voltage detection unit that detects a voltage at the battery; a temperature detection unit that detects a temperature at the battery; an effective current value calculation unit that calculates, based upon the current value measured by the current detection unit, an effective current value in a predetermined time window; and a charge/discharge restriction unit that imposes a first charge/discharge restriction so as to restrict the charge/discharge current based upon the effective current value calculated by the effective current value calculation unit.

Abstract: Provided are a battery block and a secondary battery module capable of holding a plurality of battery cells stably and so reducing a load applied to a welding part of a conductive member that is connected to an electrode by welding or the like. The battery block includes a lower holding frame and a middle holding frame, one of which includes two protrusions that are in contact with an outer peripheral face of each battery cell and the other includes a pressing part that presses the outer peripheral face of the battery cell inwardly in the radial direction. Then, one of an upper holding frame and the middle holding frame includes two protrusions that are in contact with an outer peripheral face of each battery cell and the other includes a pressing part that presses the outer peripheral face of the battery cell inwardly in the radial direction.

Abstract: An electricity storage module in which a plurality of battery cells are electrically connected via conductive members, wherein: each of the conductive members has a pair of electrode connecting parts that are welded to respective electrode terminals of a pair of adjacent battery cells, a base part that is connected to the pair of electrode connecting parts via a pair of elastically deformable parts, and a voltage detecting terminal that is connected to the base part and detects a terminal voltage of a battery cell.

Abstract: A battery control system connected to a battery, which controls charge/discharge at the battery, includes: a current detection unit that measures a current value by detecting a charge/discharge current flowing through the battery; a voltage detection unit that detects a voltage at the battery; a temperature detection unit that detects a temperature at the battery; an effective current value calculation unit that calculates, based upon the current value measured by the current detection unit, an effective current value in a predetermined time window; a time ratio calculation unit that determines a time ratio indicating a ratio of a length of time over which the effective current value has been in excess of a predetermined allowable value during a predetermined specified time period; and a charge/discharge restriction unit that restricts the charge/discharge current based upon the time ratio determined by the time ratio calculation unit.

Abstract: A battery cooling structure has a plurality of cooling passages that are formed on a surface of a cover plate attachable to a battery pack and that are for taking in cooling air into the battery pack, and a connection passage that is formed in a direction intersecting with the plurality of cooling passages on the surface of the cover plate, and that connects the plurality of cooling passages with one another to allow interchange of the cooling air. The battery pack is arranged in a center console box between a driver seat and a front passenger seat of a vehicle. The cover plate is attached to a side surface of the battery pack. The plurality of cooling passages extend in parallel with one another and in a direction vertical to a floor surface. Partial portions of the cooling passages on a floor surface side are open.

Abstract: An electricity storage device including: plural electricity storage modules, each including an electricity storage module case, plural electricity storage cells housed in the electricity storage module case, and external terminals; an electricity storage case in which the plurality of electricity storage modules are arranged and housed; plural wire harnesses connected to the external terminals of the electricity storage modules; and a vibration damping material provided in a space region between one surface of the electricity storage case and, among the plurality of wire harnesses, at least a wire harness including the longest length extending in an arrangement direction of the electricity storage modules, wherein the wire harness including the longest length extending in the arrangement direction of the electricity storage modules is biased toward a side of the electricity storage module case by the one surface of the electricity storage case, through the vibration damping material.

Abstract: An electrical storage module in which a plurality of electricity storage elements are electrically connected by conductive member, includes: a voltage detection board having voltage detection conductor that detects terminal voltage of the electricity storage element; a first external threaded component that connects the voltage detection conductor of the voltage detection board to the conductive member; and a cover that covers the voltage detection board; wherein: the cover is made from an insulating material; the conductive member has a first internal threaded portion into which the first external threaded component is to be screwingly engaged; and the distance between the inside surface of the cover that faces a head portion of the first external threaded component and an upper surface of the head portion of the first external threaded component is shorter than the distance between an end portion of the first internal threaded portion towards the cover side and an end of shaft portion of the first external

Abstract: A battery control system connected to a battery equipped with an explosion-proofing mechanism for cutting off an electric current when the battery enters an overcharge state, including: a cell voltage detection unit that detects voltage at the battery; a storage unit that stores information pertaining to the battery conditions; an overcharge decision-making unit that makes a decision as to whether or not the battery is in an overcharge state; a storage control unit that engages the storage unit to store information pertaining to the overcharge state when the overcharge decision-making unit decides that the battery is in an overcharge state; and an explosion-proofing decision-making unit that decides that the explosion-proofing mechanism in the battery has actuated if the overcharge information is stored in the storage unit and the cell voltage detected by the cell voltage detection unit is lower than a predetermined lower limit value.

Abstract: A gas discharge structure for a battery cover has a battery cover that covers part or all of a battery, a first hose that is connected with the battery cover at a position of a through-hole provided on the battery cover. and an electric wire that is electrically connected to the battery, is inserted into the first hose, and is drawn out to an outside of a vehicle compartment through an electric-wire lead-out hole provided on a vehicle body panel. A space formed between the electric wire and the first hose communicates with a space inside the battery cover. An end portion of the first hose is located at a position corresponding to the electric-wire lead-out hole, so that an opening of the space formed between the electric wire and the first hose faces the outside of the vehicle compartment.

Abstract: A battery pack cooling system includes a plurality of cells disposed in an internal space of a battery pack case so as to form a cooling passage configured to cool the cell modules by cooling air flowing in the cooling passage. A first temperature sensor is a minimum temperature sensor disposed in the upstream position which becomes a lowest temperature. A second temperature sensor is a maximum temperature sensor disposed in the downstream position which becomes a highest temperature. A third temperature sensor is configured to measure the temperature of either the highest temperature or the lowest temperature disposed in a second cell module. A cooling passage includes a cooling air inlet passage, a cooling air exhaust passage, and a plurality of cooling branch passages disposed to connect the cooling air inlet passage and the cooling air exhaust passage in parallel.