Abstract: A battery module is constructed of an integral battery case which is constituted by forming a plurality of prismatic cell cases into a unitized body, wherein positive electrode plates and negative electrode plates laminated alternately upon one another with intervening separators are respectively accommodated in each of the cell cases, thereby constituting a plurality of cells, these cells being electrically connected in series. A plurality of such battery modules are arranged in a direction in which the electrode plates within each cell are laminated in a condition with coolant passages formed between the battery modules, and bound tightly together with end plates arranged at both ends in the direction of adjacent arrangement of the battery modules.

Abstract: A battery module is constructed of an integral battery case which is constituted by forming a plurality of prismatic cell cases into a unitized body, wherein positive electrode plates and negative electrode plates laminated alternately upon one another with intervening separators are respectively accommodated in each of the cell cases, thereby constituting a plurality of cells, these cells being electrically connected in series. A plurality of such battery modules are arranged in a direction in which the electrode plates within each cell are laminated in a condition with coolant passages formed between the battery modules, and bound tightly together with end plates arranged at both ends in the direction of adjacent arrangement of the battery modules.

Abstract: A plurality of cells each encased in prismatic cell cases having short lateral walls and long lateral walls are arranged side by side, with adjacent short lateral walls being integral with each other, thereby constituting an integral battery case. The upper open ends of the plurality of prismatic cell cases are integrally closed by a single lid member. Each of the cells accommodates therein a group of electrodes stacked alternately upon one another parallel to the long lateral walls of the cell cases with intervening separators therebetween. Neighboring cells are connected in series at their abutting lateral opposite ends with each other.

Abstract: A prismatic battery module includes a prismatic battery case having a plurality of prismatic cell cases connected to one another through separation walls, a planar electroconductive connector forming part of the separation wall between the cell cases, an electrode plate group arranged in each cell case, and an electrolyte placed in each cell case. Lead portions of positive electrode plates and negative electrode plates of the electrode plate group are directly connected to the electroconductive connector. The prismatic battery module requires fewer connection points and provides shorter electrical communication paths, thereby reducing internal resistance.

Abstract: An integrated battery case 2 is made by coupling together a plurality of cell cases 3 into an integral body, open ends of the cell cases 3 being closed integrally with a lid member 4. Communicating paths 37 for communicating a suitable number of neighboring cell cases 3 with one another are provided in the lid member 4, whereby the cell cases 3 have a uniform internal pressure.

Abstract: Positive and negative electrode plates 2, 3 are alternately stacked upon one another with intervening separators 4 to constitute an electrode plate group 1. The respective electrode plates are laterally offset so that side edges of the electrode plates protrude on the opposite sides. Collector plates 5, 6 are perpendicularly welded to the side edges of the electrode plates 2, 3 on both sides of the electrode plate group 1. Loose ends 3c, 3e of the outermost negative electrode plates 3b, 3d that are not welded to the collector plate are secured to the electrode plate group by a holding tape 7.

Abstract: A sealed rechargeable battery module wherein a safety vent device is provided to release the internal pressure of the battery when the pressure has reached a predetermined value. The safety vent device includes a valve case formed with a vent and a sealing protrusion surrounding this vent. A valve body inserted in the valve case includes a sealing portion that is brought in tight contact with the sealing protrusion, a rigid holder for supporting the sealing portion, a and a resilient portion for pressing the rigid holder toward the vent. A valve cover is formed with apertures for closing the upper open end of the valve case. In a state, the resilient portion of the valve body is compressed.

Abstract: A prismatic sealed battery module includes: a prismatic battery case; an electrode plate group constituted by alternately layering positive and negative electrode plates with a separator arranged therebetween; and an electrolyte. The positive or negative electrode plates protruding from each end face of the electrode plate group are bonded to a collector member. A metal connector is fixed to the central part of the collector member facing the inner surface of the side end wall of the battery case. The collector member is connected, at the metal connector, to an external terminal using an externally connecting bolt.

Abstract: A cell includes an electrode plate group which is formed by laminating a positive electrode plate and a negative electrode plate with a separator interposed between them, and includes leads protruding toward directions opposite to each other from one side of the positive electrode plate and the negative electrode plate, collectors which are joined to the leads on both sides of the electrode plate group, and include connection protrusions formed so as to protrude outside, and a bag-shape battery case containing the electrode plate group joined to the collectors such that only the connection protrusions of the collectors are protruded outside. A battery module is constituted by placing a plurality of the cells in a prismatic battery case while the connection protrusions of the collectors of the cells are connected with each other, thereby making the current-carrying path between the electrode plate groups straight and short and increasing the output.

Abstract: In a prismatic sealed battery module which includes a plurality of electrode plate groups, collectors joined to leads on both sides of the electrode plate group, and a prismatic battery case for storing the plurality of electrode plate groups, a connected-electrode-plate-group body is constituted by connecting the plurality of electrode groups with collectors interposed between them. A sheet covering both side surfaces and a bottom surface of the peripheral surfaces of the connected-electrode-plate-group body is provided. After gaps between the sheet and outer edges of the collectors are sealed, the connected-electrode-plate-group body is placed in the prismatic battery case. Thereby, the current-carrying paths between the electrode plate groups are short and straight, resulting in reduced internal resistance.

Abstract: In an integrated sealed secondary battery 1 in which a plurality of cells 2 are arranged in a row, cooling medium passages 21 are formed on both sides of the row of the cells 2, and cooling medium passages 18 are formed between adjacent cells such as to effect communication between the cooling medium passages 21, 21 on both sides. The cross-sectional areas of the cooling medium passages 21, 21 on both sides are made different so as to generate pressure difference at both ends of the cooling medium passages 18 between the cases. The cooling medium passages 21 on both sides are formed in a meandering manner by the provision of projection strips that extend alternately downwards from the top wall and upwards from the bottom wall of the cooling medium passages 21.

Abstract: An integrated sealed secondary battery in which a plurality of cells are arranged in a row, cooling medium passages are formed on both sides on the row of the cell, and cooling medium passages are formed between adjacent cells such as to effect communication between the cooling medium passages on both sides.

Abstract: A prismatic battery module employs a prismatic battery case having a single space formed by connecting a plurality of prismatic cell cases in series. Positive and negative electrode plates are alternately stacked via a separator, and lead portions are formed by projecting side portions of the positive and negative electrode plates opposite to each other. Collectors are connected to the lead portions on both sides of the electrode plate group, and adjacent collectors of associated electrode plate groups are connected to each other by using an electroconductive adhesive or the like. Then, the electrode plate groups being connected in series are disposed in the prismatic battery case. Thereafter, a sealing material is applied to each space between each of the outer peripheries of the adjacent collectors and the wall surface of the prismatic battery case to partition the plurality of cell cases from one another.

Abstract: A battery module includes a plurality of cells accommodating an electrode plate group and an electrolyte, and a single integrated battery case for accommodating the plurality of cells. The ratio of the component resistance including the connecting resistance between the cells to the reactive resistance of the electrode plate group and the electrolyte in each cell, is set in the range of 1:99-40:60 at a temperature of 25° C. Thereby, the internal resistance per cell is reduced, and higher power output and improved service life characteristics are achieved.

Abstract: A battery pack is constructed with a plurality of battery modules. Each battery module comprises a plurality of prismatic cell cases having short lateral walls and long lateral walls and respectively accommodating elements for electromotive force, these cells being mutually coupled sharing their short lateral walls as partition walls, thereby constituting an integral battery case. Electrode terminals of positive and negative polarities are arranged at longitudinal opposite ends of the integral battery case. Projections and indentations for positioning the plurality of battery modules when coupling them together with their long side faces abutted each other to constitute the battery pack are formed substantially in the center of given cell cases positioned symmetrical with respect to the centerline in the lengthwise direction of the battery module.

Abstract: A battery assembly includes a plurality of battery modules electrically connected together, each battery module acting as a secondary battery and including an electrode group, an electrolyte, a container for housing the electrode group and the electrolyte, and a safety valve operating in accordance with the internal pressure of the container. The working pressure of each safety valve is set so that the safety valve of at least one battery module is opened when the at least one battery module has its maximum internal pressure or less during the charge equalization. It is possible to provide a battery assembly that can improve the reliability of the container strength by keeping the working pressure of each safety valve lower than the pressure that the container resists even under elevated temperature conditions.

Abstract: Connection structure of a battery unit for connecting respective terminals of a plurality of cells that are encased in cell cases, wherein positive and negative terminals of the cells respectively extend through the cell cases. The connecting structure includes coupling plates screwed on the respective terminals of the plurality of cells for electrically connecting the terminals of opposite polarity with each other. Covering members are provided which are made from an elastic material for covering the periphery of the terminals and coupling plates in such a manner that they are sealed with respect to the exterior of the battery unit. The covering members include tubular sections which are pressed against surfaces of the cell cases about the periphery of the terminals utilizing the coupling plates. Annular clamping sections which are formed on an inner circumference of the tubular sections. The annular clamping sections are clamped between the coupling plates and fixing washers for fixing the terminals.

Abstract: Positive and negative electrode plates 2, 3 are alternately stacked upon one another with intervening separators 4 to constitute an electrode plate group 1. The respective electrode plates are laterally offset so that side edges of the electrode plates protrude on the opposite sides. Collector plates 5, 6 are perpendicularly welded to the side edges of the electrode plates 2, 3 on both sides of the electrode plate group 1. Loose ends 3c, 3e of the outermost negative electrode plates 3b, 3d that are not welded to the collector plate are secured to the electrode plate group by a holding tape 7.

Abstract: An electrode plate unit capable of suppressing the internal short circuit caused by flashing that is formed on the end portion of a positive electrode plate and a battery using the same. The electrode plate unit includes a group of electrode plates in which a plurality of positive electrode plates and a plurality of negative electrode plates are laminated alternately via separators, a positive electrode collector plate connected to one side face of the group of electrode plates for connection to the positive electrode plate, and a negative electrode collector plate connected to another side face of the group of electrode plates for connection to the negative electrode plate, wherein the edge portion of the positive electrode plate is protruded from the edge portion of the negative electrode plate on the entire side face excluding the side face to which the negative electrode collector plate of the group of electrode plates is connected.

Abstract: A mount frame of the present invention includes a frame in which a plurality of openings are formed. Battery modules can be inserted removably into a plurality of openings.