Discontinuous power supply, battery management system and discontinuous power supply system

Abstract

The invention relates to the technical field of control and application of new energy sources, and in particular relates to a discontinuous power supply, a battery management system and a discontinuous power supply system, wherein the discontinuous power supply system comprises a battery pack, a discontinuous power supply and a battery management system which are correspondingly connected. Compared with the prior art, the discontinuous power supply, the battery management system and the discontinuous power supply system have the advantages that through the communication between the discontinuous power supply and the battery management system, the use of a switch tube in the battery management system is cancelled; the detected running parameter of the battery pack is sent to the discontinuous power supply through uploading data by the battery management system and then the charge/discharge parameter of the battery pack is adjusted by the discontinuous power supply; the connection between the battery pack and the discontinuous power supply is not needed to be cut off so that the possibility of sudden power failure caused by the cut-off of the switch tube on a main circuit of the battery management system is greatly reduced; and the response speed is high and no back load power failure is caused, so that the reliability and the efficiency of the whole system are simultaneously improved.

Description

technical field [0001] This application relates to the technical field of new energy control and application, in particular to an uninterruptible power supply, a battery management system and an uninterruptible power supply system. Background technique [0002] At present, the technology of battery charging by uninterruptible power supply has been widely used, but the charging, discharging management and energy management of the battery pack of the energy storage system are a difficult point in the management of the energy system. [0003] In the prior art, uninterruptible power supply systems are composed of discrete uninterruptible power supplies and battery packs; the application of lithium batteries is only the addition of lithium battery management systems (BMS) on the basis of lithium batteries, and it is still Independent components, charge and discharge management of the battery, and energy management of the battery are all obtained by the simple estimation of the b...

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Problems solved by technology

[0003] In the prior art, uninterruptible power supply systems are composed of discrete uninterruptible power supplies and battery packs; the application of lithium batteries is only the addition of lithium battery management systems (BMS) on the basis of lithium batteries, and it is still Independent components, charge and discharge management of the battery, and energy management of the battery are all obtained by the simple estimation of the battery voltage by the inverter system. Moreover, in the current battery management system on the market, the consistency management of charge and discharge is mostly only applied to On the lithium battery, the current of the main control (electric switch tube) in the battery management system (BMS) is a difficult problem in the industry, and it is also the part with the highest failure rate. In the case of overvoltage, the battery management system will shut it down. Due to the slow response speed of the electric switch tube, the delay when the system resumes power supply will cause the backup power supply of the controller to be disconnected, which will easily lead to power failure of the back-end load. Huge losses, making the system less reliable and less efficient

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