Solar inverter, cell management system and solar power supply system

Abstract

The application relates to the technical field of new energy source control and application and particularly relates to a solar inverter, a cell management system and a solar power supply system, wherein the solar power supply system comprises a cell pack, the solar inverter and the cell management system, which are correspondingly connected. Compared with the prior art, the use of a switch tube in the cell management system is concealed through communication of the solar inverter and the cell management system; detected operation parameters of the cell pack are reported to the solar inverter through the cell management system by uploading data; charge and discharge parameters of the cell pack are adjusted by the solar inverter; and the connection of the cell pack and the solar inverter does not need to be cut off, therefore, the abnormity of sudden current failure caused by disconnection of a main path switch tube of the cell management system is greatly reduced; the response speed is fast; current failure of rear-end load is not caused, and the reliability and the efficiency of the entire system are simultaneously improved.

Description

technical field

[0001] This application relates to the technical field of new energy control and application, in particular to a solar inverter, a battery management system and a solar power supply system. Background technique

[0002] At present, the technology of solar energy charging batteries has been widely used, but the charging and discharging management and energy management of battery packs in energy storage systems are a difficult point in the management of energy systems.

[0003] In the existing technology, the solar power supply system is composed of discrete solar inverters 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 curren...

Examples

Embodiment 1

[0037] A kind of solar inverter of this embodiment such as figure 1 As shown, the first interface for communication with the battery management system 2 is provided with the first interface for communication with the battery management system 2 and the battery interface connected with the battery pack 3 .

[0038] In this embodiment, the solar inverter 1 is provided with a first interface for communicating with the battery management system 2, which is realized without the use of a switch tube. Instead, the battery management system 2 detects the usage of the battery pack 3, and uses The situation is fed back to the solar inverter 1, and the solar inverter 1 performs reasonable maintenance and management on the battery pack 3. The response speed is fast, and the back-end load will not be powered off, so that the battery pack can be used reasonably.

[0039] Such as figure 2 As shown, the solar inverter 1 includes a solar branch, a mains branch, a bypass branch and a first ma...

Embodiment 2

[0055] A battery management system in this embodiment is as image 3 As shown, the battery management system 2 is respectively connected to the individual batteries of the battery pack 3 , and the battery management system 2 includes a second interface for communicating with the solar inverter 1 .

[0056] In this embodiment, the battery management system 2 is provided with a second interface for communicating with the solar inverter 1. The difference from the battery management system 2 in the prior art is that the use of the switching tube is canceled and the battery management system 2 Inform the solar inverter 1 of the detected usage of the battery pack 3 by uploading data, and the solar inverter 1 adjusts the charging and discharging parameters of the battery pack 3 without disconnecting the battery pack 3 from the solar inverter 1 , which greatly reduces the abnormality of sudden power failure of the system caused by disconnecting the 2 main switch tubes of the battery m...

Embodiment 3

[0067] A kind of solar energy power supply system of this embodiment such as Figure 5 As shown, it includes the battery pack 3 , the solar inverter 1 of the first embodiment and the battery management system 2 of the second embodiment, and the battery pack 3 , the solar inverter 1 and the battery management system 2 are connected correspondingly.

[0068] In this embodiment, the solar inverter 1 is communicated with the battery pack 3 management system (BMS) through a communication line, and the battery management system 2 notifies the solar inverter 1 of the detected usage of the battery pack 3 by uploading data. The charging and discharging parameters of the battery pack 3 are adjusted by the solar inverter 1, and the solar MPPT charging system is more perfectly combined with the battery management system 2 (BMS) and the battery pack 3 . The energy storage battery pack 3 of the solar inverter 1 can be managed more perfectly, so that the system can understand the operating s...

technical field

[0001] This application relates to the technical field of new energy control and application, in particular to a solar inverter, a battery management system and a solar power supply system. Background technique

[0002] At present, the technology of solar energy charging batteries has been widely used, but the charging and discharging management and energy management of battery packs in energy storage systems are a difficult point in the management of energy systems.

[0003] In the existing technology, the solar power supply system is composed of discrete solar inverters 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 curren...

Examples

Embodiment 1

[0037] A kind of solar inverter of this embodiment such as figure 1 As shown, the first interface for communication with the battery management system 2 is provided with the first interface for communication with the battery management system 2 and the battery interface connected with the battery pack 3 .

[0038] In this embodiment, the solar inverter 1 is provided with a first interface for communicating with the battery management system 2, which is realized without the use of a switch tube. Instead, the battery management system 2 detects the usage of the battery pack 3, and uses The situation is fed back to the solar inverter 1, and the solar inverter 1 performs reasonable maintenance and management on the battery pack 3. The response speed is fast, and the back-end load will not be powered off, so that the battery pack can be used reasonably.

[0039] Such as figure 2 As shown, the solar inverter 1 includes a solar branch, a mains branch, a bypass branch and a first ma...

Embodiment 2

[0055] A battery management system in this embodiment is as image 3 As shown, the battery management system 2 is respectively connected to the individual batteries of the battery pack 3 , and the battery management system 2 includes a second interface for communicating with the solar inverter 1 .

[0056] In this embodiment, the battery management system 2 is provided with a second interface for communicating with the solar inverter 1. The difference from the battery management system 2 in the prior art is that the use of the switching tube is canceled and the battery management system 2 Inform the solar inverter 1 of the detected usage of the battery pack 3 by uploading data, and the solar inverter 1 adjusts the charging and discharging parameters of the battery pack 3 without disconnecting the battery pack 3 from the solar inverter 1 , which greatly reduces the abnormality of sudden power failure of the system caused by disconnecting the 2 main switch tubes of the battery m...

Embodiment 3

[0067] A kind of solar energy power supply system of this embodiment such as Figure 5 As shown, it includes the battery pack 3 , the solar inverter 1 of the first embodiment and the battery management system 2 of the second embodiment, and the battery pack 3 , the solar inverter 1 and the battery management system 2 are connected correspondingly.

[0068] In this embodiment, the solar inverter 1 is communicated with the battery pack 3 management system (BMS) through a communication line, and the battery management system 2 notifies the solar inverter 1 of the detected usage of the battery pack 3 by uploading data. The charging and discharging parameters of the battery pack 3 are adjusted by the solar inverter 1, and the solar MPPT charging system is more perfectly combined with the battery management system 2 (BMS) and the battery pack 3 . The energy storage battery pack 3 of the solar inverter 1 can be managed more perfectly, so that the system can understand the operating s...

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