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公开(公告)号：US20240030731A1
公开(公告)日：2024-01-25
申请号：US18474472
申请日：2023-09-26
发明人： Zhipeng WU , Lin LI , Wenbin LI
IPC分类号： H02J7/00
CPC分类号： H02J7/0048 , H02J7/007182 , H02J3/32
摘要： An energy storage system and a method for correcting a state of charge value thereof. The correction method includes: a battery management unit sends parameter information of each of energy storage units to a power scheduling unit; the power scheduling unit determines, based on accumulated running durations and accumulated power-off durations of the energy storage units, a target energy storage unit requiring correction; the power scheduling unit delivers a power scheduling instruction to the target energy storage unit, to control the target energy storage unit to receive charging power or output discharging power; and the battery management unit monitors a voltage and a state of charge value of target energy storage units; and corrects the state of charge value of the target energy storage unit when the voltage or the state of charge value of the target energy storage unit meets a specified condition.
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公开(公告)号：US20230344235A1
公开(公告)日：2023-10-26
申请号：US18343962
申请日：2023-06-29
发明人： Zhipeng WU , Lin LI
CPC分类号： H02J3/32 , H02J7/007182 , H02J7/00711 , H02J2203/10 , H02J2207/20
摘要： An energy storage system is provided, where the energy storage system may include an energy storage module and a power conversion module. The energy storage module may be configured to generate a target waveform signal on the direct current bus when receiving a black start signal. In this case, the power conversion module may be configured to: detect the target waveform signal on the direct current bus, and turn on based on the target waveform signal. When the power conversion module cannot receive a power-on instruction of an energy management system, the power conversion module may also actively turn on when detecting the target waveform signal on the direct current bus, to implement a black startup. This features low costs and higher applicability.
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公开(公告)号：US20230052129A1
公开(公告)日：2023-02-16
申请号：US17886128
申请日：2022-08-11
发明人： Lin LI , Haibin GUO , He ZHOU
IPC分类号： H02J7/00
摘要： An energy storage system includes N switch units and N battery packs connected in series. The N switch units are separately connected to two ends of the N battery packs in a one-to-one correspondence. Each of the N switch units is configured to: when the energy storage system is in a charging state and remaining power of a battery pack correspondingly connected to each switch unit meets a first preset condition, and/or when the energy storage system is in a discharging state and the remaining power of the battery pack correspondingly connected to each switch unit meets a second preset condition, perform disconnection processing on the battery pack correspondingly connected to each switch unit. The first preset condition includes being greater than or equal to a first preset power value. The second preset condition includes being less than or equal to a second preset power value.
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公开(公告)号：US20240128745A1
公开(公告)日：2024-04-18
申请号：US18398776
申请日：2023-12-28
发明人： Yuanzheng CAO , Lin LI , Haibin GUO
IPC分类号： H02J1/06
CPC分类号： H02J1/06
摘要： A system for controlling a direct current bus voltage includes a controller and an inverter. The controller is configured to: obtain a power grid voltage; obtain a maximum sampling value of a direct current bus voltage of the inverter when the power grid voltage jumps, where the maximum sampling value of the direct current bus voltage is a maximum voltage value on the direct current bus in a time period for detecting a power grid voltage jump; obtain a first direct current bus voltage reference value based on the maximum sampling value of the direct current bus voltage; and obtain a second direct current bus voltage reference value based on the first direct current bus voltage reference value and a preset first rising gradient value, to limit a rising rate of the direct current bus voltage.
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公开(公告)号：US20230110231A1
公开(公告)日：2023-04-13
申请号：US17959505
申请日：2022-10-04
发明人： Lin LI , Haibin GUO , He ZHOU
摘要： An energy storage system and a control method thereof, so that a voltage level of an energy storage module in the energy storage system can be flexibly matched and the energy storage module can be effectively controlled based on a voltage of a direct current bus, to implement a high response speed. The energy storage system includes a plurality of energy storage modules, and each of the plurality of energy storage modules is connected to the direct current bus. The energy storage module includes a plurality of battery clusters and a plurality of first direct current-direct current converters. The battery cluster is configured to provide a direct current to the first direct current-direct current converter, or store a direct current transmitted by the first direct current-direct current converter.
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公开(公告)号：US20230087302A1
公开(公告)日：2023-03-23
申请号：US17946227
申请日：2022-09-16
摘要： A three-level converter includes a high-voltage side unit, a low-voltage side unit, a flying capacitor, a first switch to a fourth switch, and a control unit. When a voltage of the flying capacitor falls outside a safe target voltage range, the control unit may control the third switch and the fourth switch to be normally open, and control, based on the voltage of the flying capacitor and a voltage of the low-voltage side unit, each of the first switch and the second switch to be turned on or off, so that the voltage of the flying capacitor falls within the target voltage range. Alternatively, the control unit may control the first switch and the second switch to be normally open, and control, based on the voltage of the flying capacitor and a voltage of the low-voltage side unit.
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公开(公告)号：US20220255461A1
公开(公告)日：2022-08-11
申请号：US17669111
申请日：2022-02-10
发明人： Lin LI , Zhiwu XU , Haibin GUO
IPC分类号： H02M7/5387 , H02M1/00 , H02J3/38
摘要： A voltage source inverter includes a bus capacitor, a bidirectional power tube, a filter inductor, and a filter capacitor. A voltage control method includes: respectively obtaining a first feedback current and a first feedback voltage from an output end of the filter inductor and an output end of the filter capacitor; obtaining a first duty cycle and a second duty cycle based on the first feedback current, a maximum current reference value, and a minimum current reference value in a current loop; obtaining a third duty cycle based on the first feedback voltage and a voltage reference value in a voltage loop; and selecting one of the first duty cycle, the second duty cycle, and the third duty cycle, and controlling the bidirectional power tube, so that a duty cycle of the bidirectional power tube is between the first duty cycle and the second duty cycle.
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8.发明申请公开(公告)号：US20220252657A1
公开(公告)日：2022-08-11
申请号：US17667297
申请日：2022-02-08
发明人： Haibin GUO , Huan ZHAO , Zhiwu XU , Lin LI
摘要： A converter system includes a plurality of converters, a sampling circuit, and a control circuit. The plurality of converters are connected in parallel. Each converter includes a detection circuit which includes a first switch and at least two resistors. The first switch is connected in parallel with one of the at least two resistors. The control circuit control the sampling circuit to collect a first voltage and a second voltage, where the first voltage is a voltage that is between a second bus and a ground cable and that is collected by the sampling circuit when first switches in detection circuits of a first quantity are in a turn-on state, the second voltage is a voltage that is between the second bus and the ground cable and that is collected by the sampling circuit when first switches in detection circuits of a second quantity are in a turn-on state.
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公开(公告)号：US20240079881A1
公开(公告)日：2024-03-07
申请号：US18496045
申请日：2023-10-27
发明人： Lin LI , Zhiwu XU , Haibin GUO
CPC分类号： H02J3/381 , H02J3/32 , H02J3/466 , H02J2300/26
摘要： A power system includes N direct current coupling units, N direct current buses, and a main controller. The main controller is configured to: obtain a total network input demand power (a network input power required by the power grid); obtain first amplitude limiting values (indicate a maximum discharging power that can be supplied by each energy unit to the power grid); and determine first network input power values (a power value allocated to each energy unit and that is input to the power grid, and at least one direct current coupling unit is in a first amplitude limiting state) based on the total network input demand power and the first amplitude limiting values, and the first amplitude limiting state is that a first network input power value of direct current coupling unit is equal to a first amplitude limiting value corresponding to the direct current coupling unit.
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公开(公告)号：US20240039278A1
公开(公告)日：2024-02-01
申请号：US18484724
申请日：2023-10-11
发明人： Lin LI , Qinwei LIU , Mingwei XU
CPC分类号： H02J3/0012 , H02J3/38 , H02J2300/24
摘要： Any one of a plurality of to-be-grouped devices in a power supply system reports an initial bus voltage to a topology detection device; and reports a current bus voltage after delivering a bus voltage adjustment instruction to a target reference device. The bus voltage adjustment instruction instructs the target reference device to adjust a voltage. The target reference device receives the bus voltage adjustment instruction and adjusts the voltage according to the bus voltage adjustment instruction. The topology detection device obtains the initial bus voltage and the current bus voltage of the plurality of to-be-grouped devices, and determines, based on a difference between the initial bus voltage of the plurality of to-be-grouped devices and the current bus voltage of the plurality of to-be-grouped devices, whether the target reference device and a target to-be-grouped device are connected to a same bus.
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