CN210380351U - Charging and discharging control device of UPS system - Google Patents

Abstract

The utility model provides a charge-discharge control device of UPS system, charge-discharge control device include positive negative pole generating line of UPS, one or more battery package, one or more battery detection module, battery management module and DC power supply module. The utility model discloses can effectively monitor and manage its inside battery to and the charge-discharge control of battery package, promote the stability and the reliability of UPS system work, prolong the life of UPS system.

Description

Charging and discharging control device of UPS system

Technical Field

The utility model relates to an uninterrupted power source technical field, concretely relates to charge-discharge control device of UPS system.

Background

A UPS (Uninterruptible Power System/Uninterruptible Power Supply), which is a System device that connects a battery (a lead-acid battery or a lithium battery) to a host and converts direct current into commercial Power through a module circuit such as a host inverter, and is mainly used to provide stable and uninterrupted Power Supply to a single computer, a computer network System, or other Power electronic precision devices.

The charging and discharging control device in the existing UPS system has the defects of poor monitoring and protecting capability on the battery and can not effectively monitor and manage the performance parameters of the internal battery in real time; meanwhile, when the UPS system has a fault, if the charging and discharging are continuously performed, the service life of the UPS system is seriously affected; therefore, how to control charging and discharging of the battery in the UPS system and improve the stability and reliability of the UPS system are problems to be solved.

Disclosure of Invention

The utility model provides a charge-discharge control device of UPS system can promote the stability and the reliability of UPS system work to the charge-discharge control of battery package, has prolonged the life of UPS system.

The technical scheme of the utility model as follows:

a charge and discharge control device of a UPS system, the charge and discharge control device comprising:

the UPS charging and discharging positive bus is connected with a main relay, two ends of the main relay are also connected with a pre-charging relay in parallel, one end of the UPS positive bus and one end of the UPS negative bus are charging and discharging ports, and the charging and discharging ports are arranged on the right side face of the box body;

the battery pack comprises one or more battery packs, one or more battery packs which are arranged in the battery packs and are connected in series, wherein the negative electrode of each battery pack is connected to the main negative end of the battery pack, the positive electrode of each battery pack is sequentially connected with a fuse and a slave relay in series and then connected to the main positive end of the battery pack, and the main positive and negative ends of the battery pack are connected to the positive and negative buses of the UPS through positive and negative buses of the battery pack;

the battery detection modules are arranged in the battery pack, connected in parallel at the positive and negative ends of the single battery through voltage sampling ends and connected with the Hall sensor through current sampling ends, and are in communication connection with the battery management module through a CAN communication port;

the battery management module is provided with a main relay control end and a pre-charging relay control end, the main relay control end is in communication connection with the main relay, the pre-charging relay control end is in communication connection with the pre-charging relay, and the battery management module is also in communication connection with the inverter through an RS485 communication interface and is also connected with the battery detection module through a CAN communication interface;

and the direct current power supply module is respectively electrically connected with the battery pack, the battery management module and the battery detection module and is used for providing power for the battery management module and the battery detection module.

Furthermore, the battery management module is used for receiving a charge-discharge enabling signal of the inverter, fault information in the UPS system and battery data information in the battery pack, controlling the battery detection unit to close the slave relay and then controlling the main relay to close, and realizing control of the battery pack to enter a charge mode or a discharge mode; the UPS system comprises a UPS module, a battery pack, a battery management module and a battery detection module, wherein the fault information in the UPS system comprises one or more of battery pack overcurrent, single battery overvoltage, single battery undervoltage, overlarge total voltage difference of the battery pack, battery disconnection, battery management module faults and battery detection module faults; the battery pack data information includes battery parameter information, real-time estimated battery pack SOC and SOH data.

The battery detection module is used for closing the slave relay after receiving a closing control signal of the battery management module to the slave relay; after the battery management module controls the pre-charging relay to be closed, the battery pack is controlled to enter a pre-charging mode.

The technical principle of the utility model is as follows:

when no fault exists in the UPS system, the battery management module sends a slave relay closing control signal; after the battery detection module receives the data, the slave relay is controlled to be closed; after the battery management module controls the pre-charging relay to be closed, the battery pack is controlled to enter a pre-charging mode;

the battery management module receives a charge and discharge enabling signal of the inverter and receives battery data information in the battery pack detected by the battery detection unit, when faults in the UPS system do not exist, the battery detection unit is controlled to close the slave relay and then close the main relay, the battery pack is controlled to enter a charging mode under the condition that a charging opening condition is met, and the battery pack is controlled to enter a discharging mode under the condition that the charging opening condition is not met.

Therefore, the utility model can reasonably and effectively control the charging and discharging of the battery pack, and improves the management efficiency and the automatic control performance of the UPS system; meanwhile, the battery performance parameters of the battery pack can be effectively monitored, the battery pack is prevented from being charged and discharged under the condition that the UPS system has faults, and the service life of the UPS system is effectively prolonged.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification. In the drawings:

fig. 1 is an electrical connection diagram of a charge and discharge control device of a UPS system according to an embodiment of the present invention.

Detailed Description

The embodiments of the invention will be described in detail below with reference to the drawings, but the invention can be implemented in many different ways as defined and covered by the claims.

As shown in fig. 1, a charge and discharge control apparatus of a UPS system includes:

the UPS charging and discharging positive bus is connected with a main relay, two ends of the main relay are also connected with a pre-charging relay in parallel, one end of the UPS positive bus and one end of the UPS negative bus are charging and discharging ports, and the charging and discharging ports are arranged on the right side face of the box body;

the negative electrode of one or more serially connected battery packs arranged in the battery pack is connected to the main negative end of the battery pack, the positive electrode of the battery pack is sequentially connected with the fuse in series and the slave relay in series and then connected to the main positive end of the battery pack, and the main positive and negative ends of the battery pack are connected to the positive and negative buses of the UPS through the positive and negative buses of the battery pack;

the battery detection modules are connected in parallel at the positive and negative ends of the single battery through voltage sampling ends, connected with the Hall sensor through current sampling ends and in communication connection with the battery management module through a CAN communication port;

the battery management module is provided with a main relay control end and a pre-charging relay control end, the main relay control end is in communication connection with the main relay, the pre-charging relay control end is in communication connection with the pre-charging relay, and the battery management module is also in communication connection with the inverter through an RS485 communication interface and is also connected with the battery detection module through a CAN communication interface;

and the direct current power supply module is respectively electrically connected with the battery pack, the battery management module and the battery detection module and is used for providing power for the battery management module and the battery detection module.

And the battery detection module is used for closing the pre-charging relay after receiving a closing control signal of the battery management module to the slave relay, and controlling the battery pack to enter a pre-charging mode.

In the embodiment, the battery management module receives the charging enabling control signal of the inverter and receives the battery performance parameter real-time monitoring information such as the total voltage, the current, the SOC (state of charge) and SOH (state of health) real-time estimation data of the battery pack, so that the battery performance parameter of the battery pack is effectively monitored; under the condition that the UPS system has no fault, controlling the battery detection module to close the slave relay and pre-charging the battery pack; after the pre-charging, the main relay is closed under the condition that the battery pack is free from faults and meets the charging opening condition, the battery pack is controlled to enter the charging mode, the battery pack is controlled to enter the discharging mode under the condition that the battery pack is not met with the charging opening condition, the switching between the charging and the discharging of the battery is realized, meanwhile, the battery pack is prevented from being charged and discharged under the condition that the UPS system is faulty, and the service life of the UPS system is effectively prolonged.

Claims (2)

1. A charge/discharge control device for a UPS system, comprising:

the UPS charging and discharging positive bus is connected with a main relay, two ends of the main relay are also connected with a pre-charging relay in parallel, one end of the UPS positive bus and one end of the UPS negative bus are charging and discharging ports, and the charging and discharging ports are arranged on the right side face of the box body;

the negative electrode of one or more battery packs arranged in the battery pack is connected to the main negative end of the battery pack, the positive electrode of the battery pack is sequentially connected with the fuse protector in series and the slave relay in series and then connected to the main positive end of the battery pack, and the main positive and negative ends of the battery pack are connected to the positive and negative buses of the UPS through the positive and negative buses of the battery pack;

the battery detection modules are arranged in the battery pack, connected in parallel at the positive and negative ends of the single battery through voltage sampling ends and connected with the Hall sensor through current sampling ends, and are in communication connection with the battery management module through a CAN communication port;

the battery management module is provided with a main relay control end and a pre-charging relay control end, the main relay control end is in communication connection with the main relay, the pre-charging relay control end is in communication connection with the pre-charging relay, and the battery management module is also in communication connection with the inverter through an RS485 communication interface and is also connected with the battery detection module through a CAN communication interface;

and the direct current power supply module is respectively electrically connected with the battery pack, the battery management module and the battery detection module and is used for providing power for the battery management module and the battery detection module.

2. The charge/discharge control apparatus of a UPS system according to claim 1, wherein:

the battery management module is used for receiving a charge and discharge enabling signal of the inverter, fault information in the UPS system and battery data information in the battery pack, controlling the battery detection unit to close the slave relay and then controlling the main relay to close, and realizing control of the battery pack to enter a charging mode or a discharging mode;

the battery detection module is used for closing the slave relay after receiving a closing control signal of the battery management module to the slave relay; after the battery management module controls the pre-charging relay to be closed, the battery pack is controlled to enter a pre-charging mode.

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