CN215990238U

CN215990238U - Combined intelligent lithium battery energy storage system suitable for UPS system

Info

Publication number: CN215990238U
Application number: CN202121316717.9U
Authority: CN
Inventors: 闫立君; 王宇曦; 潘均英; 胥王斌; 汤贤袖
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 a combined intelligent lithium battery energy storage system suitable for a UPS system, which comprises a UPS loop, a first lithium battery, a discharge diode and an alternating current load, wherein the first lithium battery is not coupled with the UPS loop and is a high-rate low-capacity lithium battery; when the AC of the UPS loop loses power, the lithium battery is used for emergency power supply without time delay to the AC load through a discharging diode; the lead-acid battery with large floor area and small capacity is replaced by the lithium battery I, and the UPS loop is in no-coupling connection with the lithium battery, so that the impact problem and the coupling problem are solved, the design is simple, and the overhaul is convenient; when the AC of the UPS loop loses power, the lithium battery discharges the AC load without delay through the discharging diode, so that the non-delay emergency power supply of the AC load after the AC of the UPS loop loses power is ensured, and the reliability of the power supply of the downstream load is ensured.

Description

Combined 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 a combined type 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 a combined type intelligent lithium battery energy storage system suitable for a UPS system, and aims to solve the problem that in the prior art, due to the fact that a direct current side needs to be communicated with a UPS, multiple clusters need to be coupled and connected, and the design is complex.

The utility model is realized in such a way that a combined type intelligent lithium battery energy storage system suitable for a UPS system comprises a UPS loop, a first lithium battery, a discharge diode and an alternating current load, wherein the first lithium battery is not coupled with the UPS loop and is a high-rate low-capacity lithium battery; and after the UPS loop loses power, the lithium battery carries out non-delay emergency power supply on the AC load through the discharge diode.

Further, the UPS loop comprises a charge-discharge loop, and charge-discharge control is performed on the first lithium battery.

Furthermore, the combined type intelligent lithium battery energy storage system suitable for the UPS system comprises a PCS loop and a second lithium battery, wherein the second lithium battery is electrically connected with the PCS loop; and when the first lithium battery stops supplying power to the alternating current load, the lithium battery supplies power to the alternating current load.

Furthermore, the second lithium battery is a low-rate and high-capacity lithium battery.

Further, the PCS loop comprises a charge-discharge loop which is used for controlling the charge and discharge of the second lithium battery.

Furthermore, the combined type intelligent lithium battery energy storage system suitable for the UPS system comprises a PLC control unit; the UPS loop includes a rectifier and an inverter; when the rectifier stops working and the first lithium battery is discharged by the alternating current load, the PLC control unit controls the inverter to start working, and the second lithium battery supplies power to the alternating current load and stops working of the first lithium battery.

Further, the working state of the rectifier is detected through the PLC control unit.

Furthermore, the combined type intelligent lithium battery energy storage system suitable for the UPS system comprises an STS loop, wherein the STS loop is respectively connected with the UPS loop, the PCS loop and an alternating current load; and seamless switching between the AC power supply of the UPS loop and the AC power supply of the PCS loop is carried out through the STS loop.

Further, the UPS loop, the PCS loop and the STS loop are controlled in a centralized mode through the PLC control unit.

Compared with the prior art, the combined intelligent lithium battery energy storage system suitable for the UPS system provided by the utility model has the advantages that a lead-acid battery with large floor area and small capacity is replaced by the lithium battery, and the UPS loop is in no coupling connection with the lithium battery, so that the impact problem and the coupling problem are solved, the design is simple, and the maintenance is convenient; when the AC of the UPS loop loses power, the lithium battery discharges the AC load without delay through the discharging diode, so that the non-delay emergency power supply of the AC load after the AC of the UPS loop loses power is ensured, and the reliability of the power supply of the downstream load is ensured.

Drawings

Fig. 1 is a schematic circuit diagram of a combined type 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.

The utility model provides a combination formula intelligence lithium cell energy storage system suitable for UPS system, includes PLC the control unit 600, UPS return circuit 100, the PCS return circuit, STS return circuit 300, lithium cell 400, lithium cell two 500, discharge diode 410 and exchange load 700, this system has designed third level PLC the control system unit 600, has realized the tertiary framework of lithium cell energy storage system, collects the information of lithium cell 400, lithium cell two 500, PCS inverter 200, UPS return circuit 100, STS return circuit 300 etc. and control and summarize, has realized intelligent control.

The STS is a static transfer switch, which is a dual-power alternative transfer switch, and is respectively connected to the UPS loop 100 and the PCS loop, the other end of the STS loop 300 is connected to the ac load 700, and the seamless switching between the ac power supply of the UPS loop 100 and the ac power supply of the PCS loop is performed through the STS loop 300, thereby realizing the reliability of power supply of the downstream load.

In the present embodiment, the UPS loop 100 and the PCS loop are both interfaced to the AC bus AC 400V.

The first lithium battery 400 is not coupled with the UPS loop 100, and the first lithium battery 400 is a high-rate low-capacity lithium battery and discharges without delay through the discharge diode 410, so as to ensure non-delay emergency power supply for the ac load 700 after the ac power loss of the UPS loop 100.

According to the combined type intelligent lithium battery energy storage system suitable for the UPS system, the lead-acid battery with large occupied area and small capacity is replaced by the first lithium battery 400, the site space is reduced, the UPS loop 100 is not in coupling connection with the first lithium battery 400, the impact problem and the coupling problem are solved, the design is simple, and the maintenance is convenient; when the UPS loop 100 loses power, the first lithium battery 400 discharges the ac load 700 through the discharge diode 410 without delay, so as to ensure the emergency power supply of the ac load 700 after the UPS loop 100 loses power, and ensure the reliability of the power supply of the downstream load.

Further, the UPS loop 100 is matched with a charge and discharge loop to control the charge and discharge of the first lithium battery 400, so as to ensure the normal operation of the first lithium battery 400.

The UPS circuit 100 also includes a rectifier 110 and an inverter 120; when the PLC control unit 600 detects that the rectifier 110 stops working and the first lithium battery 400 supplies power to the ac load 700, the inverter 120 starts working, the PLC control unit 600 controls the second lithium battery 500 to supply power to the ac load 700, and stops discharging of the first lithium battery 400, thereby ensuring long-term power supply reliability to the ac load 700.

Furthermore, the second lithium battery 500 matched with the UPS is a low-rate and large-capacity lithium battery, a lithium battery energy storage system is used for lead-acid replacement of the UPS system, the battery capacity and the cycle number are increased, the scheme that the low-rate battery is applied to the UPS system is achieved, and meanwhile the problems of floating charge, impact, coupling and the like are solved.

Further, the PCS loop comprises a charge-discharge loop, and charge-discharge control over the second lithium battery 500 is achieved.

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. A combined type intelligent lithium battery energy storage system suitable for a UPS system is characterized by comprising a UPS loop, a first lithium battery, a discharge diode and an alternating current load, wherein the first lithium battery is not coupled with the UPS loop and is a high-rate low-capacity lithium battery; and after the UPS loop loses power, the lithium battery carries out non-delay emergency power supply on the AC load through the discharge diode.

2. The energy storage system of claim 1, wherein the UPS loop comprises a charge/discharge loop for controlling charging/discharging of the first lithium battery.

3. The energy storage system of claim 1, wherein the energy storage system comprises a PCS loop and a second lithium battery, the second lithium battery is electrically connected to the PCS loop; and when the first lithium battery stops supplying power to the alternating current load, the lithium battery supplies power to the alternating current load.

4. The combined intelligent lithium battery energy storage system suitable for the UPS system of claim 3, wherein the second lithium battery is a low-rate and high-capacity lithium battery.

5. The combined intelligent lithium battery energy storage system applicable to the UPS system of claim 3, wherein the PCS loop comprises a charge-discharge loop for performing charge-discharge control on the second lithium battery.

6. The combined intelligent lithium battery energy storage system suitable for the UPS system as claimed in claim 5, wherein the combined intelligent lithium battery energy storage system suitable for the UPS system comprises a PLC control unit; the UPS loop includes a rectifier and an inverter; when the rectifier stops working and the first lithium battery is discharged by the alternating current load, the PLC control unit controls the inverter to start working, and the second lithium battery supplies power to the alternating current load and stops working of the first lithium battery.

7. The combined intelligent lithium battery energy storage system suitable for the UPS system as claimed in claim 6, wherein the working state of the rectifier is detected by the PLC control unit.

8. The energy storage system of claim 7, wherein the energy storage system comprises an STS loop, the STS loop is connected to the UPS loop, the PCS loop, and an ac load; and seamless switching between the AC power supply of the UPS loop and the AC power supply of the PCS loop is carried out through the STS loop.

9. The energy storage system of claim 8, wherein the UPS loop, the PCS loop and the STS loop are collectively controlled by the PLC control unit.