CN215990237U

CN215990237U - Intelligent lithium battery energy storage system suitable for UPS system

Info

Publication number: CN215990237U
Application number: CN202121304957.7U
Authority: CN
Inventors: 王宇曦; 闫立君; 潘均英; 汤贤袖; 胥王斌
Original assignee: Shenzhen Yuze New Energy Co ltd
Current assignee: Shenzhen Yuze New Energy Co ltd
Priority date: 2021-06-10
Filing date: 2021-06-10
Publication date: 2022-03-08
Anticipated expiration: 2031-06-10

Abstract

The utility model relates to the technical field of energy storage, and discloses an intelligent lithium battery energy storage system suitable for a UPS system, which comprises a charging control loop and a battery system, wherein the charging control loop comprises a PCS; the PCS is provided with a wake-up voltage value and a protection voltage value, and the battery system comprises a lithium battery; when the voltage of the battery system end reaches the awakening voltage value, the PCS loop starts to charge the lithium battery; when the voltage of the battery system end reaches a protection voltage value, the PCS loop stops charging the lithium battery; the lead-acid battery of the UPS system is replaced by the lithium battery energy storage system, so that the battery capacity and the cycle times are increased, and the site space is reduced; in the operation process of the UPS system, when the voltage of the battery system end reaches the awakening voltage value, the PCS starts to charge the lithium battery, and the lithium battery is ensured to continuously supply power for the alternating current load; when the lithium battery is charged, when the voltage of the battery system end reaches a protection voltage value, the PCS stops charging the lithium battery, and the lithium battery is prevented from being in a floating and rushing phenomenon for a long time.

Description

Intelligent lithium battery energy storage system suitable for UPS system

Technical Field

The utility model relates to the technical field of energy storage, in particular to an intelligent lithium battery energy storage system suitable for a UPS system.

Background

Uninterruptible Power Supply (UPS) systems for homes and facilities have been deployed for many years and typically consist of 48Vdc lead acid batteries connected to an inverter/charger, which are large in footprint, small in capacity, short in life, and inefficient.

And the UPS group battery that lithium electricity was substituted has partly been realized, and most designs are complicated, and direct current side needs and UPS communication, needs coupling connection between the many clusters, leads to the problem that the lithium cell has the floating charge to can produce big impact at the direct current parallel operation in-process, be unfavorable for direct current system and UPS equipment itself.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide an intelligent lithium battery energy storage system suitable for a UPS system, and aims to solve the problem that a lithium battery is in floating state for a long time in the prior art.

The utility model is realized in such a way that the intelligent lithium battery energy storage system suitable for the UPS system comprises a charging control loop and a battery system, wherein the charging control loop comprises a PCS loop; the PCS loop is provided with a wake-up voltage value and a protection voltage value, and the battery system comprises a lithium battery; when the voltage of the battery system end reaches the awakening voltage value, the PCS loop starts to charge the lithium battery; and when the voltage of the battery system end reaches the protection voltage value, the PCS loop stops charging the lithium battery.

Furthermore, the intelligent lithium battery energy storage system suitable for the UPS system comprises a discharge control loop and a UPS loop, wherein the UPS loop is provided with a battery under-voltage protection voltage value; and when the voltage of the lithium battery is lower than the under-voltage protection voltage value of the battery, the lithium battery stops discharging.

Further, the intelligent lithium battery energy storage system suitable for the UPS system comprises a discharge diode; the lithium battery discharges without time delay through the discharge diode.

Furthermore, the intelligent lithium battery energy storage system suitable for the UPS system comprises a standby charging control loop; the UPS loop comprises a standby charging switch, and the standby charging control loop is controlled by the standby charging switch; when the PCS loop breaks down, the standby charging switch is closed, and the lithium battery is charged.

Further, the UPS loop includes a rectifier.

Further, the UPS circuit includes an inverter.

Further, the PCS loop includes a PCS inverter.

Furthermore, an intelligence lithium cell energy storage system suitable for UPS system includes PLC the control unit, PLC the control unit is right battery system the PCS return circuit the UPS return circuit carries out centralized control.

Compared with the prior art, the intelligent lithium battery energy storage system suitable for the UPS system provided by the utility model uses the lithium battery energy storage system to replace a lead-acid battery of the UPS system, so that the battery capacity and the cycle number are increased, and the site space is reduced; in the operation process of the UPS system, when the voltage of the battery system end reaches the awakening voltage value, the PCS loop starts to charge the lithium battery, and the lithium battery is ensured to continuously supply power for the AC load; when the lithium battery is charged, when the voltage of the battery system end reaches the protection voltage value, the PCS loop stops charging the lithium battery, so that the lithium battery is prevented from being in a floating and rushing phenomenon for a long time, a good charging state is formed, and the service life of the lithium battery is ensured.

Drawings

Fig. 1 is a schematic circuit diagram of an intelligent lithium battery energy storage system suitable for a UPS system according to an embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.

The same or similar reference numerals in the drawings of the present embodiment correspond to the same or similar components; in the description of the present invention, it should be understood that if there is an orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", etc. based on the orientation or positional relationship shown in the drawings, it is only for convenience of describing the present invention and simplifying the description, but it is not intended to indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and are not to be construed as limiting the present patent, and the specific meaning of the terms may be understood by those skilled in the art according to specific circumstances.

The following describes the implementation of the present invention in detail with reference to specific embodiments.

Referring to FIG. 1, a preferred embodiment of the present invention is provided.

An intelligent lithium battery 300 energy storage system suitable for a UPS system comprises a PLC control unit 400, a charging control loop, a discharging control loop, a standby charging control loop and a battery system, wherein the battery system comprises; the lithium battery 300 is charged by the charging control circuit, and the discharging of the lithium battery 300 is realized by the discharging control circuit, wherein when the charging control circuit fails and the lithium battery 300 cannot be charged in time, the charging of the lithium battery 300 is realized by the standby charging control circuit.

The charging control loop comprises a PCS loop; a wake-up voltage value and a protection voltage value are arranged on the PCS loop; when the voltage of the battery system end reaches the awakening voltage value, the PCS loop starts to charge the lithium battery 300, so that the normal work of the lithium battery 300 is ensured; when the voltage of the battery system end reaches the protection voltage value, the PCS loop stops charging the lithium battery 300, and the lithium battery 300 is prevented from being in a floating state for a long time.

According to the intelligent lithium battery 300 energy storage system suitable for the UPS system, the lead-acid battery of the UPS system is replaced by the lithium battery 300 energy storage system, so that the battery capacity and the cycle number are increased, and the site space is reduced; in the operation process of the UPS system, when the voltage of the battery system end reaches the awakening voltage value, the PCS loop starts to charge the lithium battery 300, and the lithium battery 300 is ensured to continuously supply power to the AC load 200; when the lithium battery 300 is charged, when the voltage of the battery system end reaches the protection voltage value, the PCS loop stops charging the lithium battery 300, so that the lithium battery 300 is prevented from being in a floating and rushing phenomenon for a long time, a good charging state is formed, and the service life of the lithium battery 300 is ensured.

The discharge control circuit comprises a UPS circuit 100, and a battery under-voltage protection voltage value is arranged on the UPS circuit 100; when the voltage of the lithium battery 300 is lower than the under-voltage protection voltage value of the battery, the lithium battery 300 stops discharging, thereby protecting the lithium battery 300.

An intelligent lithium battery 300 energy storage system suitable for a UPS system includes a discharge diode 310; the lithium battery 300 is conducted and discharged without delay through the discharge diode 310, so that the reliability of power supply of downstream liability is ensured under the condition of UPS alternating current input power failure.

Further, the UPS circuit 100 includes a backup charging switch, and the backup charging control circuit is controlled by the backup charging switch; when the PCS fails, the standby charging switch is closed to charge the lithium battery 300.

The UPS loop 100 includes a rectifier 110 and an inverter 120, and the rectifier 110 and the inverter 120 convert ac and dc to ensure charging and discharging of the lithium battery 300 and continuous power supply of the lithium battery 300 to the ac load 200.

The PCS loop comprises a PCS inverter 500, the discharging loop passes through a discharging diode 310, the charging loop passes through a bidirectional PCS inverter 500, the independence of the charging loop and the discharging loop is realized, and the floating charge problem of the lithium battery 300 in the UPS system is thoroughly avoided under the condition of ensuring the downstream load of the UPS loop 100.

The third-level PLC control unit 400 is designed, the three-level architecture of the energy storage system of the lithium battery 300 is realized, the information of the battery system, the PCS inverter 500, the UPS loop 100 and the like is collected and controlled in a summary mode, and intelligent control is realized.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims

1. An intelligent lithium battery energy storage system suitable for a UPS system is characterized by comprising a charging control loop and a battery system, wherein the charging control loop comprises a PCS loop; the PCS loop is provided with a wake-up voltage value and a protection voltage value, and the battery system comprises a lithium battery; when the voltage of the battery system end reaches the awakening voltage value, the PCS loop starts to charge the lithium battery; and when the voltage of the battery system end reaches the protection voltage value, the PCS loop stops charging the lithium battery.

2. The intelligent lithium battery energy storage system suitable for the UPS system of claim 1, wherein the discharge control loop comprises a UPS loop, and the UPS loop is provided with a battery under-voltage protection voltage value; and when the voltage of the lithium battery is lower than the under-voltage protection voltage value of the battery, the lithium battery stops discharging.

3. The intelligent lithium battery energy storage system for the UPS system of claim 2, wherein the intelligent lithium battery energy storage system for the UPS system comprises a discharge diode; the lithium battery discharges without time delay through the discharge diode.

4. The intelligent lithium battery energy storage system suitable for the UPS system of claim 2, wherein the intelligent lithium battery energy storage system suitable for the UPS system comprises a standby charging control loop; the UPS loop comprises a standby charging switch, and the standby charging control loop is controlled by the standby charging switch; when the PCS loop breaks down, the standby charging switch is closed, and the lithium battery is charged.

5. The intelligent lithium battery energy storage system for the UPS system of claim 2, wherein the UPS loop comprises a rectifier.

6. The intelligent lithium battery energy storage system for the UPS system of claim 2, wherein the UPS loop comprises an inverter.

7. The intelligent lithium battery energy storage system suitable for the UPS system as claimed in any one of claims 1 to 6, wherein the PCS loop comprises a PCS inverter.

8. The intelligent lithium battery energy storage system suitable for the UPS system as claimed in any one of claims 4 to 6, wherein the intelligent lithium battery energy storage system suitable for the UPS system comprises a PLC control unit, and the PLC control unit performs centralized control on the battery system, the PCS loop and the UPS loop.