Abstract: A power supply device in which bars BB extend in one direction and connect the terminals of the battery cells adjacent to each other. The lines (20) are electrically connectable to the bars BB. The tabs TB electrically connect the bars BB to the lines (20). The bar BB is formed of a clad plate formed of a first metal (3A) and a second metal (3B). The bar BB includes first and second holders (3a and 3b), and a tab holder. The first and second holders (3a and 3b) are arranged in the first and second metals, respectively, and hold the terminals at holding positions. The tab holder is arranged in the first metal (3A), and holds the tab TB at a holding position. The impedance between the first holder (3a) and the tab holder is substantially equal to the impedance between the tab holder and the second holder (3b).

Abstract: The signal output circuit of the highest rank state detection section outputs an abnormal signal that is generated by the processing device when an abnormality is detected by the abnormality detection section. When no abnormality is detected, a normal signal is generated by the processing device and output as the detection signal. In each state detection section other than that of the highest rank, the signal output circuit outputs an abnormal signal generated by the processing device when an abnormality is detected by the abnormality detection section, and outputs the detection signal input from a higher rank state detection section when no abnormality is detected.

Abstract: A battery block composed of a plurality of battery cells and a voltage detecting circuit (state detecting circuit) for detecting a voltage between terminals of each battery cell are included, and a flexible printed circuit board, in which a voltage detecting line for electrically connecting a positive electrode terminal or a negative electrode terminal of the battery cell and the voltage detecting circuit (state detecting circuit) is integrated with a substrate made or a flexible material, is provided.

Abstract: A plate-shaped portion of each of separators has a cross-sectional shape bent in a concavo-convex shape in a vertical direction. The plate-shaped portion of each of the separators has a flat cross-sectional shape. The plurality of separators are arranged parallel to one another to alternately line up. One surface of each of the battery cells abuts on the plate-shaped portion of the separator, and the other surface abuts on the plate-shaped portion of the separator. Thus, a spacing between the battery cells, which are adjacent to each other with the separator sandwiched therebetween, becomes equal to the thickness of the plate-shaped portion, and a spacing between the battery cells, which are adjacent to each other with the separator sandwiched therebetween, becomes equal to the thickness of the plate-shaped portion.

Abstract: One state detector detects an abnormal state or a normal state relating to charge and discharge of a battery cell group in one battery module, and generates one detection signal representing the detected state. Another state detector detects an abnormal state or a normal state relating to charge and discharge of another battery cell group in another battery module, and generates another detection signal representing the detected state. One operation processing device sends the one detection signal generated by the one state detector to an external object. Another operation processing device sends the other detection signal generated by the other state detector to the external object. The one detection signal generated by the one state detector is transmitted to at least one of the other operation processing device and the other state detector via a signal line.

Abstract: A power supply device in which bars BB extend in one direction and connect the terminals of the battery cells adjacent to each other. The lines (20) are electrically connectable to the bars BB. The tabs TB electrically connect the bars BB to the lines (20). The bar BB is formed of a clad plate formed of a first metal (3A) and a second metal (3B). The bar BB includes first and second holders (3a and 3b), and a tab holder. The first and second holders (3a and 3b) are arranged in the first and second metals, respectively, and hold the terminals at holding positions. The tab holder is arranged in the first metal (3A), and holds the tab TB at a holding position. The impedance between the first holder (3a) and the tab holder is substantially equal to the impedance between the tab holder and the second holder (3b).

Abstract: The signal output circuit of the highest rank state detection section outputs an abnormal signal that is generated by the processing device when an abnormality is detected by the abnormality detection section. When no abnormality is detected, a normal signal is generated by the processing device and output as the detection signal. In each state detection section other than that of the highest rank, the signal output circuit outputs an abnormal signal generated by the processing device when an abnormality is detected by the abnormality detection section, and outputs the detection signal input from a higher rank state detection section when no abnormality is detected.

Abstract: A battery module includes a battery block and a printed circuit board. The battery block includes a plurality of laminated battery cells. A detection circuit and an amplification circuit are mounted on the printed circuit board. In the battery block, a bus bar is attached to electrodes of the two battery cells in close proximity to each other so that the plurality of battery cells are connected in series. The bus bar attached to one of the electrodes of the battery cell at one end of the battery block is used as a shunt resistor for current detection. The detection circuit detects a voltage between both ends of the shunt resistor, which has been amplified by the amplification circuit.

Abstract: A capacity maintenance ratio determination device includes an impedance measurement unit and a capacity estimation unit. An alternating signal is applied from a signal generator to a battery. Frequency characteristics of AC impedance are calculated by the impedance measurement unit based on a response signal output from the battery in response to the alternating signal. A feature frequency is determined from the calculated frequency characteristics. The capacity estimation unit includes a memory and a determination unit. A correspondence relationship among a temperature of the battery, the feature frequency and a capacity maintenance ratio is stored in the memory. The determination unit determines the capacity maintenance ratio of the battery based on the temperature of the battery detected by a temperature detector, the determined feature frequency and the correspondence relationship stored in the memory.

Abstract: A plurality of separators are arranged to line up in an X-direction on a cooling plate to respectively correspond to a plurality of battery cells. The separators corresponding to the odd-numbered battery cells and the separators corresponding to the even-numbered battery cells are arranged in opposite directions in the X-direction. On a bottom surface portion of each of the separators, the corresponding battery cell is arranged. In this case, one side surface or the other side surface of each of the battery cells contacts a side surface portion of the corresponding separator, and a bottom surface of each of the battery cells contacts the bottom surface portion of the corresponding separator.

Abstract: A plate-shaped portion of each of separators has a cross-sectional shape bent in a concavo-convex shape in a vertical direction. The plate-shaped portion of each of the separators has a flat cross-sectional shape. The plurality of separators are arranged parallel to one another to alternately line up. One surface of each of the battery cells abuts on the plate-shaped portion of the separator, and the other surface abuts on the plate-shaped portion of the separator. Thus, a spacing between the battery cells, which are adjacent to each other with the separator sandwiched therebetween, becomes equal to the thickness of the plate-shaped portion, and a spacing between the battery cells, which are adjacent to each other with the separator sandwiched therebetween, becomes equal to the thickness of the plate-shaped portion.

Abstract: One state detector detects an abnormal state or a normal state relating to charge and discharge of a battery cell group in one battery module, and generates one detection signal representing the detected state. Another state detector detects an abnormal state or a normal state relating to charge and discharge of another battery cell group in another battery module, and generates another detection signal representing the detected state. One operation processing device sends the one detection signal generated by the one state detector to an external object. Another operation processing device sends the other detection signal generated by the other state detector to the external object. The one detection signal generated by the one state detector is transmitted to at least one of the other operation processing device and the other state detector via a signal line.

Abstract: A battery module includes a plurality of battery cells, a detection circuit, a communication unit, and a printed circuit board. The detection circuit and the communication circuit are mounted on the common printed circuit board. The detection circuit detects a voltage of each of the battery cells in the battery module, and feeds the detected voltage to the communication circuit. The communication circuit is connected to a communication circuit in another battery module or a battery ECU. Thus, the communication circuit in the battery module and the communication circuit in the other battery module or the battery ECU can communicate with each other.

Abstract: A battery block composed of a plurality of battery cells and a voltage detecting circuit (state detecting circuit) for detecting a voltage between terminals of each battery cell are included, and a flexible printed circuit board, in which a voltage detecting line for electrically connecting a positive electrode terminal or a negative electrode terminal of the battery cell and the voltage detecting circuit (state detecting circuit) is integrated with a substrate made or a flexible material, is provided.

Abstract: The power source apparatus is provided with battery blocks 50 made up of a plurality of battery cells 1 connected in battery stacks, and an outer case that holds the battery blocks 50. A block circuit board 60 to control the battery cells 1 that make up each battery stack and electrical components 63 connected to the block circuit board 60 or the battery stack are disposed in the end-planes of each battery stack. With this arrangement, electrical components are disposed in each battery block eliminating the need for a special purpose electrical component case and allowing outer case enlargement to be avoided.

Abstract: A battery system includes a plurality of battery cells and a plurality of printed circuit boards. A cell characteristics detecting circuit having a cell characteristics detecting function for detecting cell characteristics of the plurality of battery cells is mounted on each of the printed circuit boards. As well as the cell characteristics detecting circuit, a control-related circuit having a function different from the cell characteristics detecting function of each battery cell is mounted on the printed circuit board.

Abstract: A battery system includes battery modules. Each of the battery modules has an end surface member formed of a rectangular plate. The battery modules are arranged to form a line such that the end surface member of the battery module comes in contact with the end surface member of the battery module. In this state, the end surface member of the battery module is joined to the end surface member of the battery module by screws and nuts.

Abstract: In a casing, battery blocks are positioned so that a distance between a printed circuit board attached to an end surface of each of the battery blocks and an end surface opposed to the printed circuit board is greater than a distance between the end surface of the battery block, to which no printed circuit board is attached, and an end surface of the casing, which is opposed to the end surface of the battery block.

Abstract: A battery system includes a plurality of battery modules each including a plurality of battery cells. One battery module includes a main circuit board, and the other battery modules include auxiliary circuit boards. The main circuit board includes a cell characteristics detecting circuit that detects characteristics of each battery cell and a control-related circuit having a function related to control of the plurality of battery modules. The auxiliary circuit board includes a cell characteristics detecting circuit that detects characteristics of each battery cell, and does not include a control-related circuit having the function related to control of the plurality of battery modules. In a battery module of another battery system, a first printed circuit board, a board holder and a second printed circuit board are attached to one end surface frame.

Abstract: A capacity maintenance ratio determination device includes an impedance measurement unit and a capacity estimation unit. An alternating signal is applied from a signal generator to a battery. Frequency characteristics of AC impedance are calculated by the impedance measurement unit based on a response signal output from the battery in response to the alternating signal. A feature frequency is determined from the calculated frequency characteristics. The capacity estimation unit includes a memory and a determination unit. A correspondence relationship among a temperature of the battery, the feature frequency and a capacity maintenance ratio is stored in the memory. The determination unit determines the capacity maintenance ratio of the battery based on the temperature of the battery detected by a temperature detector, the determined feature frequency and the correspondence relationship stored in the memory.