Energy storage cabinet system convenient for withstand voltage test and test system of energy storage cabinet system

Abstract

The utility model relates to the technology of high-voltage power equipment, and discloses an energy storage cabinet system convenient for withstand voltage test and a test system of the energy storage cabinet system, which comprise an electric power storage module, a high-voltage distribution box, an energy storage converter and an alternating current output switch, the power storage module is electrically connected with the direct current side of the energy storage converter through the high-voltage distribution box, the alternating current side of the energy storage converter is provided with a plurality of alternating current output ends, and the alternating current output ends are connected with an external power grid through the alternating current output switch; the alternating current output end is also used as a voltage applying point for a withstand voltage test; a shell of the energy storage converter is provided with a first terminal and a second terminal, and in the energy storage converter, each alternating current output end is electrically connected with the first terminal through a lightning protection device; the second terminal is connected with a grounding wire; besides the shell of the energy storage converter, the second terminal is connected with the first terminal through a detachable cable. The utility model aims to improve the convenience of carrying out the withstand voltage test on the energy storage cabinet system by related testers.

Description

Technical Field

[0001] The utility model relates to the technical field of high-voltage electric power equipment, in particular to an energy storage cabinet system which is convenient for withstand voltage testing and a test system for the energy storage cabinet system. Background Art

[0002] The energy storage inverter is the core component of the energy storage cabinet system. It is usually used to realize the bidirectional conversion of electric energy, converting the electric energy stored in the energy storage cabinet system into usable AC or DC electric energy. It can also store the electric energy generated by the external power grid or renewable energy system in the energy storage cabinet system.

[0003] Since the energy storage cabinet system will be connected to the external power grid during operation, if there are insulation faults or leakage problems on the AC side, it may cause safety hazards such as electric shock and fire, so it is necessary to perform a withstand voltage test on the AC side. The withstand voltage test can verify the withstand voltage capability of the energy storage cabinet system under normal working conditions, ensure that the equipment will not be damaged or fail due to voltage shocks and other reasons during long-term operation, and improve the stability and reliability of the system.

[0004] Moreover, when performing a withstand voltage test on the AC side of the energy storage converter, the tester is generally required to open the cover of the energy storage converter and disconnect the connection between the energy storage converter and the grounding wire before applying voltage to the AC side for testing. This method is cumbersome to operate, brings a lot of unnecessary work to the tester, and is time-consuming and labor-intensive.

[0005] The above contents are only used to assist in understanding the technical solution of the present utility model and do not constitute an admission that the above contents are prior art. Utility Model Content

[0006] The utility model provides an energy storage cabinet system and a testing system for the energy storage cabinet system which are convenient for withstand voltage testing, aiming to improve the convenience for relevant testers to perform withstand voltage testing on the energy storage cabinet system.

[0007] To achieve the above-mentioned purpose, the utility model proposes an energy storage cabinet system that is convenient for withstand voltage test, the energy storage cabinet system comprising a power storage module, a high-voltage distribution box, an energy storage converter and an AC output switch; wherein the power storage module is electrically connected to the DC side of the energy storage converter via the high-voltage distribution box, the AC side of the energy storage converter is provided with a plurality of AC output terminals, and the AC output terminals are connected to an external power grid via the AC output switch; the AC output terminals are also used as voltage application points for withstand voltage test;

[0008] The housing of the energy storage converter is provided with a first terminal and a second terminal, and inside the energy storage converter, each AC output terminal is electrically connected to the first terminal via a lightning arrester; the second terminal is connected to a ground wire;

[0009] Outside the housing of the energy storage converter, the second terminal is further connected to the first terminal via a detachable cable.

[0010] Optionally, a connection interface of the first terminal and / or the second terminal is adapted to a connector of the detachable cable, and the connection interface is a threaded interface or a latch interface.

[0011] Optionally, in addition to the lightning arrester, a core module is also provided inside the energy storage inverter; wherein, in the core module, a power conversion unit, an AC circuit filter and a grid-connected relay are sequentially provided from the DC side to the AC side.

[0012] Optionally, a plurality of storage batteries are connected in series in the power storage module.

[0013] Optionally, the energy storage cabinet system also includes a controller; wherein the control signal output end of the controller is electrically connected to the high-voltage distribution box, the energy storage inverter and the AC output switch respectively; and the data acquisition end of the controller is electrically connected to the power storage module.

[0014] Optionally, a temperature acquisition module is further provided inside the cabinet of the energy storage cabinet system, and the temperature acquisition module is electrically connected to a data acquisition terminal of the controller.

[0015] Optionally, the energy storage cabinet system further includes an alarm module, and the alarm module is electrically connected to a control signal output terminal of the controller;

[0016] And / or, the energy storage cabinet system further includes a communication module, and the communication module is electrically connected to a communication terminal of the controller.

[0017] The utility model further proposes a test system for an energy storage cabinet system, comprising the energy storage cabinet system for facilitating a withstand voltage test as described above, and a withstand voltage test device; the withstand voltage test device is electrically connected to an AC output end of the energy storage cabinet system.

[0018] The beneficial effect of the technical solution of the utility model is that: by setting the first terminal and the second terminal on the shell of the energy storage inverter, and when the energy storage cabinet system is in normal use, the first terminal and the second terminal are connected by a detachable cable outside the energy storage inverter, so as to realize the connection between the energy storage inverter and the grounding wire; when it is necessary to perform a withstand voltage test on the energy storage cabinet system, the cable is manually unplugged, so that the tester does not need to open the cover of the energy storage inverter to disconnect the connection between the lightning arrester of the energy storage inverter and the grounding wire, and then the energy storage cabinet system needs to be subjected to a withstand voltage test, but directly unplugs the detachable cable. In this way, the tester can perform a withstand voltage test on the energy storage cabinet system more quickly and conveniently, improving the efficiency and safety of the operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a structural schematic diagram of an embodiment of an energy storage cabinet system that is convenient for withstand voltage testing according to the utility model;

[0020] Figure 2 The utility model is a structural schematic diagram of another embodiment of an energy storage cabinet system that is convenient for withstand voltage testing.

[0021] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the scheme in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments 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.

[0023] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0024] It should also be noted that when an element is referred to as being "fixed on" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element at the same time. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element at the same time.

[0025] In addition, if the description of "first", "second", etc. is involved in the utility model, it is only used for descriptive purposes (such as for distinguishing the same or similar elements), and cannot be understood as indicating or implying its relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0026] The utility model provides an energy storage cabinet system that is convenient for pressure resistance testing. Figure 1The energy storage cabinet system includes a power storage module, a high-voltage distribution box, an energy storage converter and an AC output switch; wherein the power storage module is electrically connected to the DC side of the energy storage converter via the high-voltage distribution box, the AC side of the energy storage converter is provided with a plurality of AC output terminals, and the AC output terminals are connected to the external power grid via the AC output switch; the AC output terminals are also used as voltage application points for the withstand voltage test;

[0027] The housing of the energy storage converter is provided with a first terminal D1 and a second terminal D2, and inside the energy storage converter, each AC output terminal is electrically connected to the first terminal D1 via a lightning arrester F; the second terminal D2 is connected to the ground wire;

[0028] Outside the housing of the energy storage converter, the second terminal D2 is further connected to the first terminal D1 via a detachable cable.

[0029] In this embodiment, the power storage module is used to store electric energy and can be composed of a series of batteries, which can be lithium batteries, lead-acid batteries or other types of batteries. Its main function is to store and release electric energy when needed to meet the system's demand for electric energy.

[0030] The high-voltage distribution box (also known as the DC high-voltage box) is responsible for the distribution and management of electric energy. The high-voltage distribution box is responsible for receiving the DC power from the storage module and distributing it to the energy storage converter for conversion or output. At the same time, the high-voltage distribution box can also monitor and protect the electric energy to ensure the stable operation of the system.

[0031] In the energy storage cabinet system, the high-voltage distribution box plays the role of connecting and transmitting electric energy. It can distribute electric energy to different channels or components according to the needs of the system to meet the system's demand for electric energy. At the same time, the high-voltage distribution box can also include some protection devices, such as overload protection, short-circuit protection, etc., to ensure that the system can operate safely under abnormal conditions.

[0032] When the high-voltage distribution box receives the DC power provided by the storage module, it will distribute the DC power to the DC side of the core module inside the energy storage converter, and then the core module will convert the DC power into AC power output. Among them, the core module has current conversion functions, such as DC-AC conversion or AC-DC conversion.

[0033] The AC side of the energy storage converter has multiple AC output terminals, each of which is connected to the external power grid via an AC output switch (also known as an AC isolation switch). By controlling the opening and closing of the AC output switch, the connection between each AC output terminal and the external power grid can be controlled accordingly.

[0034] Optionally, a first terminal D1 and a second terminal D2 are provided on the shell of the energy storage inverter; if the shell of the energy storage inverter is conductive (such as a shell made of metal), the first terminal D1, the second terminal D2 and the shell are not in direct contact with each other, and can be isolated from each other by a corresponding insulating medium, or the first terminal D1 and the second terminal D2 are preferably arranged in a safe and controllable area of ​​the shell (such as a panel area), and the safe and controllable area is not electrically connected to other areas of the shell, which can effectively reduce the possibility of accidental touch, leakage or misoperation, thereby improving the safety of the system.

[0035] Optionally, in the energy storage converter, a lightning arrester F (i.e., AC lightning arrester F) is configured for each AC output terminal, and each AC output terminal is connected to the AC output switch outside the energy storage converter. In addition, each AC output terminal is connected to the first terminal D1 inside the energy storage converter via a corresponding lightning arrester F. The lightning arrester F is a device used to protect electrical equipment from lightning strikes or overvoltage damage. When lightning is generated or overvoltage occurs in the power grid, the lightning arrester F can guide the energy of lightning or overvoltage to the ground to protect the electrical equipment from damage.

[0036] At the same time, the second terminal D2 is connected to the ground through a grounding wire. When the energy storage cabinet system is in normal use and no withstand voltage test is required, a detachable cable is used outside the housing of the energy storage converter to connect the first terminal D1 and the second terminal D2 to achieve the connection between the lightning arrester F and the grounding wire.

[0037] When the energy storage cabinet system needs to be subjected to a withstand voltage test, the tester can manually unplug the detachable cable outside the energy storage converter and disconnect the grounding of the lightning arrester F. At this time, the AC output end is used as the voltage application point for the withstand voltage test, and AC or high-voltage DC (such as 2800V, 3100V, etc. high-voltage DC) is applied to the AC output end to perform the withstand voltage test. At this time, since the lightning arrester F has been disconnected from the ground wire, the withstand voltage test will not be affected (that is, the withstand voltage test will not fail).

[0038] Since the detachable cable connecting the first terminal D1 and the second terminal D2 is outside the housing of the energy storage converter, the tester does not need to open the cover of the energy storage converter and disconnect the energy storage converter from the ground before performing a withstand voltage test on the energy storage cabinet system. Instead, the tester can directly unplug the detachable cable. In this way, the tester can perform a withstand voltage test on the energy storage cabinet system more quickly and conveniently, improving the efficiency and safety of the operation.

[0039] In one embodiment, by setting a first terminal and a second terminal on the housing of the energy storage inverter, and when the energy storage cabinet system is in normal use, a detachable cable is used outside the energy storage inverter to connect the first terminal and the second terminal, so as to achieve the connection between the energy storage inverter and the grounding wire; when it is necessary to perform a withstand voltage test on the energy storage cabinet system, the cable is manually unplugged, so that the tester does not need to open the cover of the energy storage inverter to disconnect the connection between the lightning arrester of the energy storage inverter and the grounding wire, and then directly unplug the detachable cable to perform a withstand voltage test on the energy storage cabinet system. In this way, the tester can perform a withstand voltage test on the energy storage cabinet system more quickly and conveniently, improving the efficiency and safety of the operation.

[0040] In one embodiment, based on the above embodiment, the connection interface of the first terminal D1 and / or the second terminal D2 is adapted to the connector of the detachable cable, and the connection interface is a threaded interface or a latch interface.

[0041] In this embodiment, the connection interface of the first terminal D1 and / or the second terminal D2 is designed to adapt to the connector of the detachable cable, and the connection interface can be a threaded interface or a latch interface, which not only improves the stability and reliability of the connection, but also makes it easier to disassemble.

[0042] By adopting a threaded interface or a pin interface, the detachable cable can be tightly connected to the terminal, ensuring the stability and security of the connection. When disassembly is required, the cable can be easily separated from the terminal by simply undoing the thread or unlocking the pin, without the need for additional tools or complicated operations, thus saving time and effort.

[0043] In one embodiment, based on the above embodiment, in addition to the lightning arrester F, a core module is also provided inside the energy storage inverter; wherein, in the core module, a power conversion unit, an AC circuit filter and a grid-connected relay are sequentially provided from the DC side to the AC side.

[0044] In this embodiment, in the core module inside the energy storage converter, the AC output of the power conversion unit is connected to the grid-connected relay after passing through the AC filter circuit.

[0045] The power conversion unit is used for power conversion of the energy storage converter, converting DC power into AC power or vice versa. It is responsible for controlling and regulating the flow of power to ensure that the system can work efficiently.

[0046] Among them, the AC circuit filter is used to filter out stray signals and noise in the circuit to ensure the stability and purity of the output voltage. It can reduce electromagnetic interference and harmonics and improve the working efficiency and reliability of the system.

[0047] Among them, the parallel network relay is used to control the on and off of each AC output.

[0048] In one embodiment, based on the above embodiment, a plurality of storage batteries are connected in series in the power storage module.

[0049] In one embodiment, based on the above embodiment, referring to Figure 2 , the energy storage cabinet system also includes a controller; wherein the control signal output end of the controller is electrically connected to the high-voltage distribution box, the energy storage converter and the AC output switch respectively; the data acquisition end of the controller is electrically connected to the power storage module.

[0050] In this embodiment, in the energy storage cabinet system, the controller undertakes the important tasks of monitoring, managing and controlling the entire system.

[0051] The control signal output end of the controller is electrically connected to the high-voltage distribution box, energy storage converter and AC output switch. This means that the controller can send instructions to these devices to control their operating status. Through the control signal output, the controller can achieve precise control of each key component of the energy storage system to meet the requirements of system operation.

[0052] The data acquisition end of the controller is electrically connected to the battery module, and can obtain real-time parameter data of the battery module, such as voltage, current, temperature, etc. These data are crucial for system monitoring and management. The controller can make real-time adjustments and optimizations based on these data to ensure safe and stable operation of the system.

[0053] Through the control signal output and data acquisition functions of the controller, the energy storage cabinet system can realize intelligent control and monitoring of each component, improve the operating efficiency and reliability of the system, and also facilitate remote monitoring and management of the system.

[0054] In one embodiment, based on the above embodiment, referring to Figure 2 A temperature acquisition module is also provided inside the cabinet of the energy storage cabinet system, and the temperature acquisition module is electrically connected to the data acquisition terminal of the controller.

[0055] In this embodiment, the temperature acquisition module can monitor the temperature changes inside the cabinet in real time and transmit the data to the controller so that the system can make corresponding adjustments and protective measures.

[0056] Optionally, the temperature acquisition module can collect real-time temperature data of various components inside the cabinet, including batteries, electronic components, etc., to ensure that the system operates within a safe temperature range (for example, a temperature sensor connected to the temperature acquisition module can be set in the high-voltage distribution box or the energy storage inverter body).

[0057] Optionally, the temperature acquisition module may transmit the collected temperature data to the controller through an electrical connection with a data acquisition terminal of the controller for analysis and processing by the controller.

[0058] When the temperature inside the cabinet exceeds the set safety range, the controller can trigger the corresponding protection mechanism based on the received temperature data, such as adjusting the fan speed (a corresponding cooling fan can be set inside the cabinet), reducing the charging and discharging power, etc., to prevent the system from overheating and being damaged.

[0059] For example, during the withstand voltage test of the energy storage cabinet system, when the temperature acquisition module detects that the temperature inside the cabinet exceeds the standard, the system's protection mechanism can be triggered to prevent potential dangers caused by overheating. This is because during the withstand voltage test, the system may be under high load and run for a long time, which may cause the temperature inside the cabinet to rise. When the temperature acquisition module detects that the temperature exceeds the standard, the system can take timely measures, such as reducing the charge and discharge power or increasing the fan speed, to ensure that the system operates within a safe range, thereby protecting the energy storage cabinet system from potential damage caused by overheating.

[0060] By monitoring and adjusting the internal temperature of the cabinet, the system can better control the working status of each component, improve the working efficiency and reliability of the system, and extend the service life of the equipment.

[0061] In one embodiment, based on the above embodiment, referring to Figure 2 , the energy storage cabinet system further includes an alarm module, the alarm module being electrically connected to a control signal output terminal of the controller;

[0062] And / or, the energy storage cabinet system further includes a communication module, and the communication module is electrically connected to a communication terminal of the controller.

[0063] In this embodiment, the alarm module is used to send out an alarm signal when an abnormality or failure occurs in the system (for example, the temperature acquisition module detects abnormal temperature in the cabinet) to notify relevant personnel or system administrators. By electrically connecting the alarm module to the control signal output terminal of the controller, the controller can trigger an alarm signal when a system abnormality is detected. Such a design can promptly remind the operation and maintenance personnel or the monitoring system so that they can quickly take measures to deal with the problem, thereby reducing the impact of system failures on production or operation.

[0064] The communication module allows the energy storage cabinet system to communicate data with external systems or devices, such as data exchange and remote control with a monitoring center, remote server or other energy storage systems. Electrically connecting the communication module to the communication terminal of the controller can achieve real-time information exchange between the system and the external environment. This design enables the system to have the ability of remote monitoring, remote management and collaborative operation with other systems, greatly improving the intelligence level and scalability of the system.

[0065] Based on the communication module, the system can remotely feedback the system operation status (including abnormal status) and withstand voltage test results, thereby improving the system's monitoring capabilities and management efficiency.

[0066] The utility model further proposes a test system for an energy storage cabinet system, which comprises an energy storage cabinet system and a withstand voltage test device as described in the above embodiment; the withstand voltage test device is electrically connected to the AC output end of the energy storage cabinet system.

[0067] The specific structure of the energy storage cabinet system refers to the above embodiments. Since the test system of the energy storage cabinet system adopts all the technical solutions of all the above embodiments, it at least has all the technical effects brought by the technical solutions of the above embodiments, which will not be described one by one here.

[0068] Optionally, the withstand voltage test device can test the insulation performance of the system under high voltage conditions by applying a high voltage power supply (such as AC or DC) to the AC output terminal of the energy storage cabinet system to evaluate whether the system can effectively isolate the power supply under high voltage environment to prevent accidents or failures caused by electrical problems.

[0069] Optionally, by applying a high voltage power supply, the voltage withstand test device can verify the voltage withstand capability of the energy storage cabinet system, that is, whether the system can operate normally within a certain voltage range without problems such as breakdown or leakage.

[0070] The above description is only a partial or preferred embodiment of the present invention. Neither the text nor the drawings can limit the scope of protection of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the overall concept of the present invention, or direct / indirect application in other related technical fields are included in the scope of protection of the present invention.

Claims

1. An energy storage cabinet system that is convenient for withstand voltage testing, characterized in that: The energy storage cabinet system includes a power storage module, a high-voltage distribution box, an energy storage converter and an AC output switch; wherein the power storage module is electrically connected to the DC side of the energy storage converter via the high-voltage distribution box, the AC side of the energy storage converter is provided with a plurality of AC output terminals, and the AC output terminals are connected to the external power grid via the AC output switch; the AC output terminals are also used as voltage application points for the withstand voltage test; The housing of the energy storage converter is provided with a first terminal and a second terminal, and inside the energy storage converter, each AC output terminal is electrically connected to the first terminal via a lightning arrester; the second terminal is connected to a ground wire; Outside the housing of the energy storage converter, the second terminal is further connected to the first terminal via a detachable cable.

2. The energy storage cabinet system for pressure resistance testing according to claim 1, characterized in that: The connection interface of the first terminal and / or the second terminal is adapted to the connector of the detachable cable, and the connection interface is a threaded interface or a latch interface.

3. The energy storage cabinet system for pressure resistance testing according to claim 1, characterized in that: In addition to the lightning arrester, the energy storage converter is also provided with a core module; wherein, in the core module, a power conversion unit, an AC circuit filter and a grid-connected relay are sequentially provided from the DC side to the AC side.

4. The energy storage cabinet system for facilitating withstand voltage testing according to claim 1, characterized in that: A plurality of storage batteries are connected in series in the power storage module.

5. The energy storage cabinet system for pressure resistance test according to any one of claims 1 to 4, characterized in that: The energy storage cabinet system also includes a controller; wherein the control signal output end of the controller is electrically connected to the high-voltage distribution box, the energy storage converter and the AC output switch respectively; and the data acquisition end of the controller is electrically connected to the power storage module.

6. The energy storage cabinet system for pressure resistance test according to claim 5, characterized in that: A temperature acquisition module is also provided inside the cabinet of the energy storage cabinet system, and the temperature acquisition module is electrically connected to the data acquisition terminal of the controller.

7. The energy storage cabinet system for facilitating withstand voltage testing as claimed in claim 6, characterized in that: The energy storage cabinet system further includes an alarm module, which is electrically connected to a control signal output terminal of the controller; And / or, the energy storage cabinet system further includes a communication module, and the communication module is electrically connected to a communication terminal of the controller.

8. A testing system for an energy storage cabinet system, characterized in that: It comprises an energy storage cabinet system that is convenient for withstand voltage testing as described in any one of claims 1 to 7, and a withstand voltage testing device; the withstand voltage testing device is electrically connected to the AC output end of the energy storage cabinet system.

Images