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Method for preventing over-discharge of energy storage system and energy storage system

An energy storage system and over-discharge technology, which is applied in the field of energy storage, can solve the problems of increased maintenance costs of energy storage systems, and achieve the effects of reducing after-sales maintenance costs, preventing over-discharge, preventing over-discharge and restoring over-discharge in time

Inactive Publication Date: 2021-02-19
GREE ELECTRIC APPLIANCES INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to solve the technical problem that the over-discharge of the energy storage system in the prior art leads to an increase in maintenance cost. The present invention proposes a method for preventing the over-discharge of the energy storage system and an energy storage system

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  • Method for preventing over-discharge of energy storage system and energy storage system
  • Method for preventing over-discharge of energy storage system and energy storage system

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Embodiment Construction

[0018] like figure 1 As shown, in the embodiment of the present invention, an energy storage system is provided, which includes a battery module, a battery management system, and a power converter. The battery module is usually composed of multiple single cells connected in series or in parallel. The battery management system is used to manage the power, heat generation, charging and discharging of the battery. The power converter is usually a DC / DC converter or a DC / AC converter, which is mounted on a DC bus or an AC bus, and is used to supply power to the bus or remove power from the bus to supply power to the battery module. The specific working mode of the converter is controlled by the battery management system. The energy storage system also maintains a connection with the upper-level control device through the battery management system, and is used for responding to a control instruction of the upper-level control device. Usually, the control instruction of the upper...

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Abstract

The invention discloses a method for preventing over-discharge of an energy storage system and the energy storage system. The method for preventing over-discharge of the energy storage system comprises the steps of detecting the state of the energy storage system when the energy storage system is connected to a grid, and enabling the energy storage system not to respond to a control instruction ofupper-layer control equipment and to carry out automatic charging when the energy storage system is in an over-discharge state. By adopting the technical scheme of the invention, the stable switchingof the off-grid and grid-connected states of the method for preventing the over-discharge of the energy storage system can be realized.

Description

technical field [0001] The invention relates to the field of energy storage, in particular to a method for preventing over-discharge of an energy storage system and an energy storage system. Background technique [0002] An energy storage system generally consists of a battery module, a battery management system, and a power converter (DC / DC or DC / AC). In the current energy storage system application scenarios, the operation of the energy storage system is generally controlled by external equipment. We often refer to this external equipment as upper-level control equipment. Charging, discharging and operating modes of the energy system. Under such a framework, the energy storage system is always a controlled device, and any behavior requires control instructions from the upper-layer control device. When the communication with the upper-layer control device is lost or the instructions given by the upper-layer control device are unreasonable, the energy storage system may wi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J7/00H02J3/32
CPCH02J7/00306H02J3/32
Inventor 樊廷峰曾云洪那科
Owner GREE ELECTRIC APPLIANCES INC