EMS control device applied to outdoor energy storage cabinet

Abstract

The utility model relates to an EMS control device applied to an outdoor energy storage cabinet, and relates to the technical field of EMS control. An outdoor energy storage battery pack is connected with a full-bridge inverter circuit, the A output of the full-bridge inverter circuit is connected with a selection switch S1, the selection switch S1 is connected with an LC filter circuit, the B output of the full-bridge inverter circuit is connected with a selection switch S3, and the selection switch S3 is grounded; for two full-bridge inverter circuits connected with adjacent outdoor energy storage battery packs, a selection switch S2 is arranged between the B output of the downstream full-bridge inverter circuit and the A output of the upstream full-bridge inverter circuit. The topological relation between the full-bridge inverter circuits is controlled through the selection switch S1, the selection switch S2 and the selection switch S3, the outdoor energy storage battery pack supports series connection of any number of the full-bridge inverter circuits, and the outdoor energy storage battery pack can adapt to the output voltage of each corresponding phase by changing the number of the series-connected full-bridge inverter circuits.

Description

Technical Field

[0001] The utility model relates to the technical field of EMS control, in particular to an EMS control device applied to an outdoor energy storage cabinet. Background Art

[0002] Battery energy storage systems are easy to install and place, have low requirements for placement locations, and are easy to access the power generation, transmission, and transformation links of the power grid. They can play the role of backup power supply, load balancing, peak load reduction, etc. According to expert predictions, with the in-depth development of smart grid construction, the demand for battery energy storage systems will increase dramatically in the next three to five years.

[0003] In order to reduce the power loss during power transmission and line loss, the power generated by the power plant first enters the transmission network after being stepped up, and then enters the distribution network after being stepped down after long-distance transmission. It is further stepped down to 400V by the distribution transformer and enters the terminal residential users or a higher distribution voltage to supply power to industrial and mining enterprises. Therefore, the voltage of the power grid is divided into different levels. At present, the energy management system of battery energy storage needs to be configured with a PCS (energy storage inverter) designed for a specific voltage level of the power grid in order to connect the energy storage battery to the power grid of the corresponding voltage level. On the one hand, the access of energy storage batteries to the single voltage level power grid limits the flexibility of energy storage access to the grid. On the other hand, the energy storage inverter designed for a specific voltage level power grid makes the energy storage inverter low in adaptability. Utility Model Content

[0004] In order to solve the above technical problems or at least partially solve the above technical problems, the utility model provides an EMS control device applied to an outdoor energy storage cabinet.

[0005] The utility model provides an EMS control device applied to an outdoor energy storage cabinet, comprising: a plurality of outdoor energy storage battery packs, wherein the outdoor energy storage battery packs are connected to a full-bridge inverter circuit, wherein an A output of the full-bridge inverter circuit is connected to a selection switch S1, wherein the selection switch S1 is connected to an LC filter circuit, and an B output of the full-bridge inverter circuit is connected to a selection switch S3, wherein the selection switch S3 is grounded;

[0006] For two full-bridge inverter circuits connected to adjacent outdoor energy storage battery groups, a selection switch S2 is provided between the B output of the downstream full-bridge inverter circuit and the A output of the upstream full-bridge inverter circuit;

[0007] In the series full-bridge inverter circuit corresponding to each phase, the A output of the most upstream full-bridge inverter circuit is connected to the LC filter circuit via the selection switch S1 as a phase output, and any two adjacent full-bridge inverter circuits in the middle full-bridge inverter circuit are connected to the A output of the upstream full-bridge inverter circuit via the selection switch S2 with the B output of the downstream full-bridge inverter circuit, and the B output of the most downstream full-bridge inverter circuit is grounded via the selection switch S3;

[0008] Each of the full-bridge inverter circuits is electrically connected to a full-bridge inverter drive circuit, and the full-bridge inverter drive circuit is electrically connected to an EMS controller.

[0009] Furthermore, the outdoor energy storage battery pack is first connected to a BOOST boost circuit, and the BOOST boost circuit is connected to the full-bridge inverter circuit;

[0010] The BOOST boost circuit includes: connecting an outdoor energy storage battery pack V x The positive inductor L1 is connected to the switch tube Q2, and the switch tube Q2 is connected to the outdoor energy storage battery group V x The negative electrode forms a loop, the switch tube Q1 is connected between the inductor L1 and the switch tube Q2, and the switch tube Q1 and the outdoor energy storage battery group V x A capacitor C1 is connected in parallel between the negative electrodes, and the capacitor C1 is connected to the full-bridge inverter circuit.

[0011] Furthermore, the full-bridge inverter circuit includes: a switch tube Q3, a switch tube Q4, a switch tube Q5, and a switch tube Q6, wherein the switch tube Q3 and the switch tube Q4 are connected in series, the switch tube Q5 and the switch tube Q6 are connected in series, the switch tube Q3 and the switch tube Q4 are connected in parallel as a whole with the switch tube Q5 and the switch tube Q6 as a whole, the A output is located between the switch tube Q3 and the switch tube Q4, and the B output is located between the switch tube Q5 and the switch tube Q6; the bases of the switch tubes Q3, Q4, Q5, and Q6 are connected to the full-bridge inverter drive circuit, and the full-bridge inverter drive circuit is electrically connected to the EMS controller.

[0012] Furthermore, the LC filter circuit includes: an inductor L2, one end of the inductor L2 is connected to the selection switch S1, the other end of the inductor L2 is connected to one plate of the capacitor C2, and the other plate of the capacitor C2 is grounded.

[0013] Furthermore, the outdoor energy storage battery group is connected to the BMS, the BMS is electrically connected to the EMS controller, and the EMS controller is connected to the voltage and current sensor on the AC side.

[0014] Furthermore, each of the outdoor energy storage battery groups includes a series battery group formed by a plurality of batteries connected in series, and the plurality of series battery groups are connected in parallel with each other.

[0015] Furthermore, the EMS controller is electrically connected to a temperature and humidity sensor, a water immersion sensor, and a smoke sensor; the EMS controller is electrically connected to a battery liquid cooling unit, the EMS controller is electrically connected to a display, and the EMS controller is electrically connected to a communication module.

[0016] The above technical solution provided by the embodiment of the utility model has the following advantages compared with the prior art:

[0017] In the utility model, an outdoor energy storage battery pack is connected to a full-bridge inverter circuit, an A output of the full-bridge inverter circuit is connected to a selection switch S1, the selection switch S1 is connected to an LC filter circuit, and a B output of the full-bridge inverter circuit is connected to a selection switch S3, and the selection switch S3 is grounded; for two full-bridge inverter circuits connected to adjacent outdoor energy storage battery packs, a selection switch S2 is provided between the B output of the downstream full-bridge inverter circuit and the A output of the upstream full-bridge inverter circuit.

[0018] The topological relationship between the full-bridge inverter circuits is controlled by the selection switch S1, the selection switch S2 and the selection switch S3. In the series full-bridge inverter circuit corresponding to each phase, the A output of the most upstream full-bridge inverter circuit is connected to the LC filter circuit via the selection switch S1 as a phase output, and any two adjacent full-bridge inverter circuits in the middle full-bridge inverter circuit are connected to the A output of the upstream full-bridge inverter circuit via the selection switch S2 with the B output of the downstream full-bridge inverter circuit, and the B output of the most downstream full-bridge inverter circuit is grounded via the selection switch S3. The utility model supports any number of full-bridge inverter circuits in series, and by changing the number of series full-bridge inverter circuits, the outdoor energy storage battery group can adapt to the output voltage of each corresponding phase. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings herein are incorporated in and constitute a part of the specification, illustrate embodiments consistent with the present utility model, and together with the description, are used to explain the principles of the present utility model.

[0020] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0021] Figure 1 A schematic diagram of the topological structure of a full-bridge inverter circuit per phase, an outdoor energy storage battery pack and an LC filter circuit in an EMS control device applied to an outdoor energy storage cabinet provided by an embodiment of the utility model;

[0022] Figure 2 A circuit diagram of two sets of full-bridge inverter circuits, an outdoor energy storage battery pack, an LC filter circuit, a selection switch S1, a selection switch S2, and a selection switch S3 provided in an embodiment of the utility model;

[0023] Figure 3A circuit diagram of two groups of full-bridge inverter circuits, an outdoor energy storage battery pack, an LC filter circuit, a selection switch S1, a selection switch S2 and a selection switch S3 using a BOOST boost circuit provided in an embodiment of the utility model;

[0024] Figure 4 A schematic diagram of the overall architecture of an EMS control device applied to an outdoor energy storage cabinet provided in an embodiment of the utility model. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element.

[0027] Example 1

[0028] See also Figure 1 As shown, the embodiment of the utility model provides an EMS control device applied to an outdoor energy storage cabinet, comprising:

[0029] Several outdoor energy storage battery packs, Figure 1 The outdoor energy storage battery group is represented by V1, V2...V3N. In order to enhance the reliability of the outdoor energy storage battery group and improve the output voltage of the outdoor energy storage battery group, a preferred method is that each of the outdoor energy storage battery groups includes a series battery group formed by a plurality of batteries connected in series, and the plurality of series battery groups are connected in parallel with each other. The outdoor energy storage battery group is connected to the BMS, and the BMS is electrically connected to the EMS controller. BMS stands for battery management system, which is used to supervise each battery in the outdoor energy storage battery group.

[0030] Each of the outdoor energy storage battery groups is connected to a full-bridge inverter circuit, which includes: a switch tube Q3, a switch tube Q4, a switch tube Q5, and a switch tube Q6, wherein the switch tube Q3 and the switch tube Q4 are connected in series, the switch tube Q5 and the switch tube Q6 are connected in series, the switch tube Q3 and the switch tube Q4 are connected in parallel as a whole with the switch tube Q5 and the switch tube Q6 as a whole, the A output is located between the switch tube Q3 and the switch tube Q4, and the B output is located between the switch tube Q5 and the switch tube Q6; the bases of the switch tubes Q3, Q4, Q5, and Q6 are connected to the full-bridge inverter drive circuit, and the full-bridge inverter drive circuit is electrically connected to the EMS controller.

[0031] The A output of the full-bridge inverter circuit is connected to the selection switch S1, the selection switch S1 is connected to the LC filter circuit, the B output of the full-bridge inverter circuit is connected to the selection switch S3, and the selection switch S3 is grounded. For two full-bridge inverter circuits connected to adjacent outdoor energy storage battery groups, the B output of the downstream full-bridge inverter circuit is connected to the A output of the upstream full-bridge inverter circuit via the selection switch S2.

[0032] The topological relationship between the full-bridge inverter circuits is controlled by the selection switch S1, the selection switch S2 and the selection switch S3, and any number of full-bridge inverter circuits are supported in series. By changing the number of full-bridge inverter circuits in series, the outdoor energy storage battery pack can adapt to the output voltage of each phase. Figure 1 The three-phase output is represented by Ua, Ub and Uc respectively, such as Figure 1 As shown, in the series full-bridge inverter circuit corresponding to each phase, the A output of the upstream full-bridge inverter circuit is connected to the LC filter circuit via the selection switch S1 as a single-phase output, and the B output of the downstream full-bridge inverter circuit is grounded via the selection switch S3.

[0033] The LC filter circuit includes: an inductor L2, one end of the inductor L2 is connected to the selection switch S1, the other end of the inductor L2 is connected to one plate of a capacitor C2, and the other plate of the capacitor C2 is grounded.

[0034] Each of the full-bridge inverter circuits is electrically connected to a full-bridge inverter drive circuit, and the full-bridge inverter drive circuit is electrically connected to an EMS controller.

[0035] During the specific implementation process, see Figure 4 As shown, the EMS controller is electrically connected to the temperature and humidity sensor, the water immersion sensor, and the smoke sensor; the EMS controller is electrically connected to the battery liquid cooling unit, the EMS controller is electrically connected to the display, and the EMS controller is electrically connected to the communication module. The EMS controller is connected to the voltage and current sensor on the AC side.

[0036] Example 2

[0037] In the embodiment of the utility model, in order to increase the output voltage of a single outdoor energy storage battery group, such as Figure 3 As shown, the outdoor energy storage battery pack is first connected to a BOOST boost circuit, and the BOOST boost circuit is connected to the full-bridge inverter circuit; the BOOST boost circuit includes: connecting an outdoor energy storage battery pack V x The positive inductor L1 is connected to the switch tube Q2, and the switch tube Q2 is connected to the outdoor energy storage battery group V x Negative electrode, outdoor energy storage battery pack V x The inductor L1 and the switch tube Q2 form a loop, the switch tube Q1 is connected between the inductor L1 and the switch tube Q2, and the switch tube Q1 is connected to the outdoor energy storage battery group V x A capacitor C1 is connected in parallel between the negative electrodes, and the capacitor C1 is connected to the full-bridge inverter circuit.

[0038] In the embodiments provided by the present utility model, it should be understood that the disclosed structure can be implemented in other ways. For example, the structural embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interfaces, structures or units, which can be electrical, mechanical or other forms.

[0039] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0040] In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0041] The above description is only a specific embodiment of the present invention, so that those skilled in the art can understand or implement the present invention. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but should conform to the widest scope consistent with the principles and novel features applied herein.

Claims

1. An EMS control device applied to an outdoor energy storage cabinet, characterized in that: include: A plurality of outdoor energy storage battery groups, wherein the outdoor energy storage battery groups are connected to a full-bridge inverter circuit, wherein an A output of the full-bridge inverter circuit is connected to a selection switch S1, wherein the selection switch S1 is connected to an LC filter circuit, and an B output of the full-bridge inverter circuit is connected to a selection switch S3, wherein the selection switch S3 is grounded; For two full-bridge inverter circuits connected to adjacent outdoor energy storage battery groups, a selection switch S2 is provided between the B output of the downstream full-bridge inverter circuit and the A output of the upstream full-bridge inverter circuit; In the series full-bridge inverter circuit corresponding to each phase, the A output of the most upstream full-bridge inverter circuit is connected to the LC filter circuit via the selection switch S1 as a phase output, and any two adjacent full-bridge inverter circuits in the middle full-bridge inverter circuit are connected to the A output of the upstream full-bridge inverter circuit via the selection switch S2 with the B output of the downstream full-bridge inverter circuit, and the B output of the most downstream full-bridge inverter circuit is grounded via the selection switch S3; Each of the full-bridge inverter circuits is electrically connected to a full-bridge inverter drive circuit, and the full-bridge inverter drive circuit is electrically connected to an EMS controller.

2. The EMS control device for outdoor energy storage cabinet according to claim 1 is characterized in that: The outdoor energy storage battery pack is first connected to a BOOST boost circuit, and the BOOST boost circuit is connected to the full-bridge inverter circuit; The BOOST boost circuit includes: connecting an outdoor energy storage battery pack V x The positive inductor L1 is connected to the switch tube Q2, and the switch tube Q2 is connected to the outdoor energy storage battery group V x The negative electrode forms a loop, the switch tube Q1 is connected between the inductor L1 and the switch tube Q2, and the switch tube Q1 and the outdoor energy storage battery group V x A capacitor C1 is connected in parallel between the negative electrodes, and the capacitor C1 is connected to the full-bridge inverter circuit.

3. The EMS control device for outdoor energy storage cabinet according to claim 1 is characterized in that: The full-bridge inverter circuit includes: a switch tube Q3, a switch tube Q4, a switch tube Q5, and a switch tube Q6, wherein the switch tube Q3 and the switch tube Q4 are connected in series, the switch tube Q5 and the switch tube Q6 are connected in series, the switch tube Q3 and the switch tube Q4 are connected in parallel as a whole with the switch tube Q5 and the switch tube Q6 as a whole, the A output is located between the switch tube Q3 and the switch tube Q4, and the B output is located between the switch tube Q5 and the switch tube Q6; the bases of the switch tubes Q3, Q4, Q5, and Q6 are connected to the full-bridge inverter drive circuit, and the full-bridge inverter drive circuit is electrically connected to the EMS controller.

4. The EMS control device for outdoor energy storage cabinet according to claim 1, characterized in that: The LC filter circuit includes: an inductor L2, one end of the inductor L2 is connected to the selection switch S1, the other end of the inductor L2 is connected to one plate of a capacitor C2, and the other plate of the capacitor C2 is grounded.

5. The EMS control device for outdoor energy storage cabinet according to claim 1, characterized in that: The outdoor energy storage battery group is connected to the BMS, the BMS is electrically connected to the EMS controller, and the EMS controller is connected to the voltage and current sensor on the AC side.

6. The EMS control device for outdoor energy storage cabinet according to claim 1, characterized in that: Each of the outdoor energy storage battery groups includes a series battery group formed by a plurality of batteries connected in series, and the plurality of series battery groups are connected in parallel with each other.

7. The EMS control device for outdoor energy storage cabinet according to claim 1, characterized in that: The EMS controller is electrically connected to a temperature and humidity sensor, a water immersion sensor, and a smoke sensor; the EMS controller is electrically connected to a battery liquid cooling unit, the EMS controller is electrically connected to a display, and the EMS controller is electrically connected to a communication module.

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