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公开(公告)号：US20230402865A1
公开(公告)日：2023-12-14
申请号：US18457113
申请日：2023-08-28
发明人： Tsutomu SAKAKIBARA , Naohisa HATANI , Hitoshi KOBAYASHI , Jiro MIYAKE , Ken MARUYAMA , Toshinobu NAGASAWA , Toshiaki OZEKI , Goro MORI
IPC分类号： H02J7/00 , G01R31/3835 , G01R31/396 , H01M10/42 , H01M10/48
CPC分类号： H02J7/00712 , H02J7/0047 , H02J7/0013 , H02J7/00032 , G01R31/3835 , G01R31/396 , H01M10/425 , H01M10/482 , H02J2207/20 , H01M2010/4271 , H01M2010/4278
摘要： A cell stack management system includes a cell monitoring unit that measures an output voltage of a plurality of power storage cells, a battery management unit that manages a cell stack, and a first communication network that connects the cell monitoring unit and the battery management unit. The battery management unit includes: a first communication circuit connected to the first communication network; a second communication circuit connected to a second communication network for connecting to a higher-level system; a control circuit that controls the battery management unit; and a control circuit power supply. The cell stack management system includes a normal mode and a low-power mode as modes of operation. During transition from the low-power mode to the normal mode, the first communication circuit activates at least one of the control circuit power supply, the control circuit, or the second communication circuit.
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公开(公告)号：US20230408586A1
公开(公告)日：2023-12-21
申请号：US18456299
申请日：2023-08-25
发明人： Jiro MIYAKE , Naohisa HATANI
IPC分类号： G01R31/371 , G01R31/3835 , G01R31/396 , H01M10/48
CPC分类号： G01R31/371 , G01R31/3835 , G01R31/396 , H01M10/482
摘要： A voltage measurement device measures the voltage of at least one of series-connected battery cells, and includes one or more voltage detection circuits. Each voltage detection circuit includes: a first communication path; a mode control circuit that switches a mode of operation of the voltage detection circuit between normal and low-power modes; a first communication control circuit (communication control circuit) that transmits and receives a command signal to and from the first communication path; an activation signal detection circuit that detects an activation signal input from the first communication path; and an alarm generation circuit that, in the low-power mode, generates and outputs an alarm signal indicating an anomaly in the battery cells to the first communication path. In the low-power mode, when the activation signal detection circuit detects the activation signal, the mode control circuit switches the mode of operation to the normal mode.
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公开(公告)号：US20240222820A1
公开(公告)日：2024-07-04
申请号：US18602691
申请日：2024-03-12
发明人： Naohisa HATANI , Toshiaki OZEKI , Goro MORI
IPC分类号： H01M50/569 , H01M10/48 , H01M50/51
CPC分类号： H01M50/569 , H01M10/482 , H01M50/51
摘要： A voltage measurement device individually detects, in a cell stack of n (n is an integer greater than or equal to two) battery cells connected in series, a voltage of each of the n battery cells, and includes: n+1 resistor elements, first terminals of which are connected to a positive electrode of an upper-end battery cell among the n battery cells, a negative electrode of a lower-end battery cell among the n battery cells, and connection points between the n battery cells; n+1 capacitors, first terminals of which are respectively connected to second terminals of the n+1 resistor elements; and a voltage measurer connected to the second terminals of the n+1 resistor elements. Second terminals of two or more capacitors among the n+1 capacitors are connected to a positive electrode of a k-th battery cell (k is an integer; 1≤k≤n−1) among the n battery cells.
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公开(公告)号：US20230400521A1
公开(公告)日：2023-12-14
申请号：US18456273
申请日：2023-08-25
发明人： Naohisa HATANI , Goro MORI
IPC分类号： G01R31/3835 , H02J7/00 , H01M10/48 , H01M50/51 , H01M10/42
CPC分类号： G01R31/3835 , H02J7/0019 , H02J7/0047 , H01M10/482 , H01M50/51 , H01M10/425 , H01M2010/4271
摘要： A voltage measurement device includes a first measurement circuit that measures voltage between both ends of a busbar, a second measurement circuit that measures voltage between both ends of each of a plurality of first battery cells and a plurality of second battery cells, and a correction circuit that corrects a measurement value measured by the second measurement circuit. The second measurement circuit is connected to the plurality of first battery cells, the busbar, and the plurality of second battery cells via the plurality of second RC filters. The correction circuit corrects a measurement value measured by the second measurement circuit using a measurement value of voltage between both ends of the busbar measured by the first measurement circuit.
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公开(公告)号：US20230400522A1
公开(公告)日：2023-12-14
申请号：US18457068
申请日：2023-08-28
发明人： Fumiaki OGUE , Naohisa HATANI , Goro MORI
IPC分类号： G01R31/3835 , G01R31/396 , G01R19/00
CPC分类号： G01R31/3835 , G01R31/396 , G01R19/0084
摘要： A voltage measurement system includes: a first reference signal transmission device (communication device) including a first master oscillator that generates a first master clock signal and a first reference signal generation circuit that generates a first reference signal based on the first master clock signal; and a first voltage measurement device including a first slave oscillator, a first correction circuit that corrects an oscillation frequency of the first slave oscillator based on the first reference signal, and a first voltage measurement circuit. The voltage measurement system includes: a normal mode; and a correction mode in which the first reference signal is transmitted from the first reference signal transmission device (communication device) to the first voltage measurement device, and the oscillation frequency of the first slave oscillator is synchronized with an oscillation frequency of the first master oscillator using the first reference signal.
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