Abstract: A grid connection control method of an energy storage apparatus, an energy storage control unit, an energy storage system, and a storage medium are provided and relate to the field of energy storage technologies, where the method includes: sequentially controlling energy storage units of energy storage sub-modules to be connected to corresponding voltage-sharing capacitors in a state in which a main energy transmission circuit is disconnected from a direct-current bus, so as to make the energy storage units pre-charge the corresponding voltage-sharing capacitors; and controlling the main energy transmission circuit to be connected to the direct-current bus under a condition that the voltage-sharing capacitor of each energy storage sub-module meets a voltage-sharing capacitor pre-charge completion condition.

Abstract: Provided are an energy storage system and a control system and a control method of the energy storage system. The energy storage system includes a converter valve and an energy storage valve, the energy storage valve is connected to a direct-current side of the converter valve, and the control system includes: a coordination control subsystem, a converter valve control subsystem, and an energy storage valve control subsystem; the coordination control subsystem is used for sending an instruction to control the converter valve control subsystem and the energy storage valve control subsystem to work; the converter valve control subsystem is used for controlling, according to the instruction of the coordination control subsystem, the converter valve to work; and the energy storage valve control subsystem is used for controlling, according to the instruction of the coordination control subsystem, the energy storage valve to work.

Abstract: A control method of an energy storage system. The energy storage system includes a plurality of energy storage modules connected in series. The control method includes: acquiring a difference value between a first state parameter of a first energy storage module and a first state parameter of a second energy storage module among N available energy storage modules in the energy storage system, N being a positive integer greater than 1; and conducting balance control on the energy storage system according to the difference value of the first state parameters.

Abstract: A control method of an energy storage system. The energy storage system includes N energy storage modules connected in series, and N is a positive integer greater than 1. The control method includes: acquiring a first parameter of each energy storage module among the N energy storage modules, the first parameter being a parameter related to the power; and conducting balance control on the energy storage system according to the first parameter of each energy storage module.

Abstract: Provided are a control method for an energy storage system and the energy storage system. The energy storage system includes N energy storage sub-modules, where N is a positive integer greater than 1. The control method for the energy storage system includes: acquiring an SOC and a charge-discharge limiting current of each of the N energy storage sub-modules; and controlling working states of the N energy storage sub-modules according to the SOC and the charge-discharge limiting current of each of the energy storage sub-modules, where the working states include a switched-on state and a switched-off state. According to the technical solution provided by embodiments of this application, the problem of SOC imbalance among the energy storage sub-modules can be solved, so that the utilization rate of the energy storage system is improved.

Abstract: The present application provides a temperature control component, which includes a first side plate, a second side plate and a first buffer plate. A cavity is formed by the second side plate and the first side plate; the first buffer plate is disposed between the second side plate and the first side plate to divide the cavity into multiple channels, and at least part of the first buffer plate extends obliquely from the first side plate towards the second side plate. The present application also provides a battery pack, which includes the temperature control component described above.

Abstract: Embodiments of this application provide an energy storage device and system as well as a power system, and relate to the technical field of a power grid. The energy storage device includes: at least two parallel-connected energy storage units, where each energy storage unit includes: a battery cluster and a power conversion system; and the battery cluster includes at least two cells; a direct-current side of the power conversion system is electrically connected to the battery cluster, an alternating-current side of the power conversion system is configured to electrically connect to an input side of an alternating-current combiner cabinet, and an output side of the alternating-current combiner cabinet is configured to electrically connect to an alternating-current side of a transformer. The energy storage device is configured to improve safety and reliability of the energy storage system.

Abstract: The present application provides a temperature control component, which includes a first side plate, a second side plate and a first buffer plate. A cavity is formed by the second side plate and the first side plate; the first buffer plate is disposed between the second side plate and the first side plate to divide the cavity into multiple channels, and at least part of the first buffer plate extends obliquely from the first side plate towards the second side plate. The present application also provides a battery pack, which includes the temperature control component described above.

Abstract: Embodiments of this application provide an energy storage device and system as well as a power system, and relate to the technical field of a power grid. The energy storage device includes: at least two parallel-connected energy storage units, where each energy storage unit includes: a battery cluster and a power conversion system; and the battery cluster includes at least two cells; a direct-current side of the power conversion system is electrically connected to the battery cluster, an alternating-current side of the power conversion system is configured to electrically connect to an input side of an alternating-current combiner cabinet, and an output side of the alternating-current combiner cabinet is configured to electrically connect to an alternating-current side of a transformer. The energy storage device is configured to improve safety and reliability of the energy storage system.