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Battery system, BMS thereof, and full-charge and full-discharge SOC calibration method

A battery system and calibration method technology, applied in the direction of measuring electricity, measuring electrical variables, measuring devices, etc., can solve problems such as the inability to calibrate multiple parallel RACKs in battery systems

Pending Publication Date: 2021-02-09
SUNGROW ENERGY STORAGE TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In this regard, this application provides a battery system and its BMS and full-full discharge SOC calibration method to solve the problem that the existing SOC calibration method cannot realize all calibrations of multiple parallel RACKs in the battery system

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  • Battery system, BMS thereof, and full-charge and full-discharge SOC calibration method
  • Battery system, BMS thereof, and full-charge and full-discharge SOC calibration method
  • Battery system, BMS thereof, and full-charge and full-discharge SOC calibration method

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Embodiment Construction

[0067] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0068] The present application provides a full-full-full-discharge SOC calibration method of a battery system to solve the problem that the existing SOC calibration method cannot realize all the calibrations of multiple parallel RACKs in the battery system.

[0069] In practical applications, the battery system can also be called an energy storage battery system. by Figure 8 For example, the BMS in the battery system generally consists of one SMU 101 and mul...

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Abstract

The invention provides a battery system, a BMS thereof, and a full-charge and full-discharge SOC calibration method. The method is applied to the BMS in the battery system, and after receiving parameter information reported by each CMU, an SMU records a mapping relationship between an extreme value monomer voltage and an SOC in each parameter information at a preset voltage interval; after SOC correction parameters reported by the CMUs triggering the full-charge and full-discharge conditions are received, the mapping relation between the extreme value monomer voltage corresponding to the CMUsand the SOC is corrected, and then the corrected mapping relation is issued to all the CMUs; and each CMU performs SOC calibration according to the current extreme value monomer voltage of the CMU andthe corrected monomer voltage SOC mapping relation. According to the method, SOC calibration can be carried out on the RACK which is firstly triggered to be fully charged and fully discharged, otherCMUs can be calibrated through communication linkage between all the CMUs and the SMU according to the corrected monomer voltage SOC mapping relation, and all calibration of the multiple RACKs connected in parallel is achieved.

Description

technical field [0001] The invention relates to the technical field of battery management, in particular to a battery system, its BMS, and a full-full-discharge SOC calibration method. Background technique [0002] A battery system generally consists of multiple battery clusters RACK connected in parallel, and is managed by a multi-level BMS (Battery Management System, battery management system). Among them, each PACK in the RACK is managed by a corresponding BMU (Battery Management unit, battery management unit); each RACK is managed by a corresponding CMU (Battery cluster management unit, battery cluster management unit); each CMU in the entire system Unified by a SMU (System Management Unit, system management unit) for management. [0003] In practical applications, the CMU is mainly used to collect signals such as battery voltage and current in RACK, and to estimate the state of SOC (State-Of-Charge, state of charge), and based on this to perform charge and discharge co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/367G01R31/382G01R31/396
CPCG01R31/367G01R31/382G01R31/396
Inventor 邵俊伟戈正来葛德顺马伟赵志强
Owner SUNGROW ENERGY STORAGE TECH CO LTD