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Energy storage system and parameter calibration method

An energy storage system and parameter calibration technology, which is applied in the direction of instruments, measuring devices, and measuring electronics, can solve the problems of increased error, parameter calibration of the battery, and the inability of the battery to be fully charged or discharged.

Pending Publication Date: 2021-12-28
HUAWEI DIGITAL POWER TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the battery can only perform parameter calibration when it is passively charged or discharged. However, for some special scenarios, such as scenarios with frequent charging and discharging schedules, the battery cannot be fully charged or discharged for a long time, which makes it impossible to perform parameter calibration for a long time. Calibration, the error may increase with long-term accumulation, and the service life of the battery will be affected

Method used

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  • Energy storage system and parameter calibration method
  • Energy storage system and parameter calibration method
  • Energy storage system and parameter calibration method

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Embodiment Construction

[0048] The technical solution in this application will be described below with reference to the accompanying drawings.

[0049] figure 1 It is a schematic diagram of the structure of the energy storage system 100 provided by the embodiment of this application. First combine the following figure 1 A brief description will be made of the energy storage system provided in the embodiment of the present application.

[0050] Such as figure 1 As shown, the energy storage system 100 includes: a control device and one or more battery sub-arrays, and the control device can be used to control the one or more battery sub-arrays connected to it. Wherein, each battery sub-array may include one or more battery clusters, and each battery cluster may include one or more battery packs.

[0051] Optionally, the energy storage system 100 further includes a direct current (direct current, DC)-DC converter, a power conversion system (power conversion system, PCS) and a direct current bus. One...

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Abstract

The invention provides an energy storage system and a parameter calibration method. The energy storage system comprises a control device and one or more battery sub-arrays, wherein each battery sub-array comprises one or more battery clusters, and each battery cluster comprises one or more battery packs; the control device is used for determining that a first battery cluster in the first battery sub-array needs to be subjected to parameter calibration; under the condition that the first battery cluster meets the preset condition, the weight of the first battery cluster in the first battery sub-array is increased; and after the electric quantity of each battery pack in the first battery cluster is fully charged or the remaining electric quantity is emptied, parameters of each battery pack are calibrated. Therefore, the battery cluster can be fully charged or emptied in advance so as to complete parameter calibration of each battery pack therein, so that the problem of large error caused by long-time accumulation of battery parameters can be effectively relieved, and the service life of the battery pack can be prolonged.

Description

technical field [0001] The present application relates to the technical field of battery management, and more specifically, relates to an energy storage system and a parameter calibration method. Background technique [0002] With the development of new energy storage systems, battery parameters are crucial to the management of the system, such as the state of charge (SOC). SOC can be used to represent the percentage of remaining power in the battery. If the SOC is inaccurate, it may Will affect the service life of the battery or the distribution of scheduling instructions. Therefore, it is essential to calibrate the parameters of the battery on a regular basis. [0003] Generally, the parameter calibration of the battery needs to be carried out when the battery is fully charged or discharged. At present, the battery can only perform parameter calibration when it is passively charged or discharged. However, for some special scenarios, such as scenarios with frequent chargi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/387
CPCG01R31/387H02J7/0069H02J7/0013H02J7/0048H01M2010/4271H01M10/425H01M10/441Y02E60/10G01R31/374
Inventor 李琳周贺郭海滨
Owner HUAWEI DIGITAL POWER TECH CO LTD