Energy storage high-voltage box

Abstract

The utility model provides an energy storage high-voltage box, which belongs to the field of energy storage equipment and comprises a circuit breaker, a pre-charging contactor, a contactor, a pre-charging resistor, a direct-current power supply, an alternating-current power supply, a fuse, a sensor, a panel socket, an inverter and a main control module. An alternating-current power supply or the direct-current power supply supplies power to electric elements in the energy storage high-voltage box, when the alternating-current power supply can supply power normally, the alternating-current power supply is adopted to supply power to the electric elements in the energy storage high-voltage box, and when the alternating-current power supply is not used, the direct-current power supply is adopted to supply power to the electric elements in the energy storage high-voltage box. The two power taking modes of the alternating current power supply and the direct current power supply are parallel, the internal direct power supply can take the electric energy of the energy storage battery for continuous operation of the internal electric elements under the condition that the external power grid is powered off, the influence of power grid power failure accidents is avoided, the stability and safety of the system can be kept, and the economic benefit is saved to a certain extent.

Description

Technical Field

[0001] The utility model relates to the field of energy storage, in particular to an energy storage high-voltage box. Background Art

[0002] In recent years, driven by economic growth, energy issues have become increasingly important, with electricity being a key component. For power plants, significant differences in electricity consumption between daytime and nighttime lead to tight demand during the day and a surplus at night. For factories, energy costs remain high due to peak and off-peak prices. In this context, the energy storage industry has emerged as a significant force. Power plants can address this need to mitigate these differences, while factories can use energy storage devices to charge at night and discharge during the day, saving electricity costs and improving business profitability.

[0003] The energy storage high-voltage box is a high-voltage power circuit management unit designed specifically for energy storage systems. It is an intermediate unit connecting the battery cluster and the energy storage inverter. It is responsible for controlling the storage and release process of electrical energy to ensure the safety and stability of the system.

[0004] In the prior art, the energy storage high-voltage box draws power from the grid and uses the grid as a power supply to control its own working state. When the grid is powered off, the energy storage high-voltage box is powered off and stops working. Utility Model Content

[0005] In view of this, an embodiment of the present invention provides an energy storage high-voltage box, so that the energy storage high-voltage box can reliably supply power to electrical equipment.

[0006] To achieve the above objectives, the present invention provides the following technical solutions:

[0007] An energy storage high-voltage box, comprising:

[0008] Circuit breaker, pre-charge contactor, contactor, pre-charge resistor, DC power supply, AC power supply, fuse, sensor, panel socket, inverter and main control module;

[0009] The circuit breaker, pre-charge contactor, contactor, pre-charge resistor, positive part of the fuse and positive copper busbar together constitute the positive circuit of the high-voltage box, one end of the positive circuit is connected to the grid interface, and the other end is connected to the positive input terminal of the energy storage battery;

[0010] The circuit breaker, contactor, negative electrode part of the sensor and the negative copper busbar together constitute the negative circuit of the high-voltage box. One end of the negative circuit is connected to the grid interface, and the other end is connected to the negative input terminal of the energy storage battery.

[0011] The input end of the inverter is connected to the output end of the energy storage battery;

[0012] The positive power output interface of the energy storage high-voltage box is connected to the positive output terminal of the inverter, and the negative power output interface of the energy storage high-voltage box is connected to the negative output terminal of the inverter;

[0013] The AC power supply and the DC power supply are used to supply power to electrical components in the energy storage high-voltage box.

[0014] Optionally, in the above-mentioned energy storage high-voltage box, the AC power supply is used to obtain high-voltage AC power from the grid interface and convert the high-voltage AC power into target DC power;

[0015] The DC power supply is used to obtain high-voltage DC power from the copper busbar and convert the high-voltage DC power into target DC power;

[0016] The target direct current is the rated input voltage of the electrical components inside the energy storage high-voltage box.

[0017] Optionally, in the above-mentioned energy storage high-voltage box, the main control module of the energy storage high-voltage box is at least used for: when the energy storage high-voltage box is started, if there is AC power input at the grid interface, controlling the AC power supply to supply power to the electrical components inside the energy storage high-voltage box; if there is no AC power input at the grid interface, controlling the DC power supply to supply power to the electrical components inside the energy storage high-voltage box.

[0018] Optionally, the energy storage high-voltage box further includes: a communication module, the communication module being used to implement data interaction between the main control module and the host computer;

[0019] The main control module of the energy storage high-voltage box is also used to control the energy storage battery in the energy storage box and collect the output information of the sensor, and communicate with the host computer.

[0020] Optionally, in the above energy storage high-voltage box, the main control module is further used to:

[0021] When the arrival of the first preset time node is detected, determining whether the power in the energy storage battery is greater than a first preset value;

[0022] When the value is less than a first preset value, the power grid is controlled to charge the energy storage battery.

[0023] Optionally, in the above-mentioned energy storage high-voltage box, the first preset time node is the starting time node corresponding to the valley electricity price in the peak-valley electricity price.

[0024] Optionally, in the energy storage high-voltage box, the energy storage high-voltage box is further used for:

[0025] When the arrival of the second preset node is detected, or when the power grid is detected to be off, it is determined whether the remaining power of the energy storage battery is greater than the second preset value. When it is greater than the second preset value, the energy storage high-voltage box is controlled to discharge to the electrical equipment.

[0026] Optionally, in the energy storage high-voltage box, the second preset time node is the starting time node corresponding to the peak electricity price in the peak-valley electricity price.

[0027] Optionally, in the energy storage high-voltage box, the sensor includes one or more of a current sensor, a voltage sensor, and a temperature sensor.

[0028] Optionally, in the energy storage high-voltage box, the shell of the energy storage high-voltage box is a metal shell sprayed with an anti-corrosion layer.

[0029] Based on the above technical solution, the above solution provided by the embodiment of the present invention is that when the energy storage high-voltage box is in operation, the electrical components in the energy storage high-voltage box are powered by the AC power supply or the DC power supply. When the AC power supply can supply power normally, the AC power supply is used to power the electrical components in the energy storage high-voltage box. When the AC power supply is unavailable, the DC power supply is used to power the electrical components in the energy storage high-voltage box. The two power supply methods of AC power supply and DC power supply are used in parallel. In the event of an external power grid outage, the internal direct power supply can draw power from the energy storage battery to supply the internal electrical components to continue operating, without being affected by power grid outages. This can maintain the stability and safety of the system and save economic benefits to a certain extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0031] Figure 1 This is a schematic structural diagram of the energy storage high-voltage box disclosed in the embodiment of this application;

[0032] Figure 2 It is a structural diagram of the panel socket of the energy storage high-voltage box;

[0033] Figure 3 This is a flow chart of the control logic of a main control module disclosed in an embodiment of the present application;

[0034] Figure 4 This is a flow chart of the control logic of the main control module disclosed in another embodiment of the present application;

[0035] Figure 5 This is a schematic diagram of the structure of an electronic device for loading the control logic disclosed in an embodiment of the present application. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0037] In order to ensure that the energy storage high-voltage box can also supply power to electrical equipment when the power grid is out of power, the present application discloses an energy storage high-voltage box, which is equipped with both an AC power supply and a DC power supply. Both the AC power supply and the DC power supply can supply power to the electrical components in the high-voltage box. When it is detected that the AC power supply is unavailable due to a power grid outage or its own fault, a DC power supply is used instead of the AC power supply to power the electrical components in the high-voltage energy storage box.

[0038] Figure 1 This is a structural diagram of an energy storage high-voltage box disclosed in an embodiment of the present application. An energy storage high-voltage box, the internal modules of which may include but are not limited to:

[0039] Circuit breaker 1, pre-charge contactor 2, contactor 3, pre-charge resistor 4, DC power supply 5, AC power supply 6, fuse 7, sensor 8, panel socket 9, inverter and main control module;

[0040] Regarding the circuit breaker 1, the circuit breaker is used to realize the switch control of the entire current loop, and remotely control the tripping of the circuit breaker to realize the circuit disconnection. In this application, the rated voltage of the circuit breaker should be greater than or equal to the rated voltage of the energy storage high-voltage box. For example, if the rated voltage of the energy storage high-voltage box is 1000V, the rated voltage of the circuit breaker should also be at least 1000V or higher. Similarly, the rated current of the circuit breaker should also be greater than or equal to the maximum current that may pass through the energy storage high-voltage box during normal operation. The specific type of the circuit breaker can be selected according to the usage scenario. For example, in this embodiment, the circuit breaker can be a frame circuit breaker, a molded case circuit breaker, a miniature circuit breaker, a vacuum circuit breaker, a sulfur hexafluoride circuit breaker, etc.

[0041] Regarding the contactor, it is used to achieve on-off control of the entire circuit and communicate the on-off status with the main control module in the energy storage high-voltage box. The contactor can be a DC contactor, a high-voltage AC contactor, a vacuum contactor, an electromagnetic contactor, a hydraulic or pneumatic contactor, etc.

[0042] Regarding the pre-charge circuit, to ensure safe charging of the high-voltage energy storage box, it is equipped with a pre-charge circuit. This circuit is designed to pre-charge the system in a safe and controllable manner before officially connecting to the main circuit, thereby preventing high current from directly impacting system components and protecting the safety and stability of the entire circuit. This mechanism relies primarily on two core components: a pre-charge contactor and a pre-charge resistor, which work together to implement the pre-charge process. The pre-charge contactor is an electrical switch that controls the on / off state of the pre-charge circuit. During the pre-charge process, the pre-charge contactor is closed, allowing current to flow through the pre-charge circuit. Once pre-charge is complete, the pre-charge contactor may open to isolate the pre-charge circuit from the main circuit, or in some designs, it may remain closed and continue to operate as part of the main circuit. The selection of the pre-charge contactor is generally based on its voltage and current capabilities, as well as the required switching speed. These parameters are particularly important in high-voltage energy storage boxes to ensure reliable operation even in harsh operating environments. The pre-charge resistor is a key component in the pre-charge circuit, limiting the current during the pre-charge process. When the pre-charge contactor is closed, the power supply slowly charges the energy storage element (such as a capacitor bank) through the pre-charge resistor. The resistor limits the charging current to a low level, thus preventing damage to the element due to high current surges. The selection of the pre-charge resistor value requires careful consideration of multiple factors, including the capacity of the energy storage element, the allowable charging time, and the desired charging current. A value that is too large may result in excessive charging time, while a value that is too small may not effectively limit the charging current. Before the entire circuit is energized, the pre-charge contactor is closed, and the power supply charges the energy storage element through the pre-charge resistor. The limiting effect of the pre-charge resistor keeps the charging current at a low and controllable level. As the energy storage element voltage gradually increases, the charging current gradually decreases. When the energy storage element voltage approaches the power supply voltage, the pre-charge process is essentially complete. At this point, the pre-charge contactor can be opened or left closed, depending on the system design. If the pre-charge contactor is opened, the main circuit can be safely connected; if it remains closed, the pre-charge circuit continues to operate as part of the main circuit.

[0043] The main control module (MCM) in the battery high-voltage box is the core of the system, integrating data acquisition and processing, system control and management, communication and data exchange, and system optimization and upgrade functions. The MCM is responsible for collecting key battery pack parameters, including voltage, current, and temperature, to enable real-time monitoring of the battery status. By analyzing and processing the collected data, the MCM assesses the battery's health, remaining capacity (SOC), and state of health (SOH), providing a basis for subsequent decision-making. The MCM also intelligently regulates the battery's charge and discharge processes based on the battery status and external environmental conditions, ensuring optimal operation and extending its lifespan. Furthermore, if an anomaly (such as overvoltage, undervoltage, overcurrent, or overtemperature) in the battery pack or individual cells is detected, the MCM immediately activates protection mechanisms, such as current reduction and power outage, to prevent accidents. Furthermore, the MCM can communicate and exchange data with a host computer, uploading device status information from the energy storage high-voltage box and receiving data commands from the host computer.

[0044] Regarding the power supply, the energy storage high-voltage box includes an AC power supply and a DC power supply. The AC power supply is powered by an external power grid, while the DC power supply is directly powered by an internal battery. These two power supplies are used to power all the electrical components within the high-voltage box. The AC power supply may include an input circuit, a voltage regulator circuit, a control circuit, and an output circuit. The input circuit receives AC power from the external power grid and typically includes an input filter to suppress external noise and electromagnetic interference, ensuring the purity of the input signal. The voltage regulator circuit converts the input AC voltage to change its voltage level and provide electrical isolation. The voltage regulator circuit adjusts the output voltage to meet the power supply requirements of the components within the high-voltage box. The control circuit is the core component of the AC power supply and includes a feedback loop and several control components. The control circuit monitors the output voltage and compares it with a set reference voltage to generate an error signal. This error signal is used to adjust the output of the voltage regulator circuit to ensure output voltage stability. The output circuit provides a stable AC power output for the electrical components within the high-voltage box. An AC power supply (AC power supply) refers to a power supply device that can provide alternating current (AC). AC power supplies can be categorized by various standards into the following types: single-phase, three-phase, regulated, unregulated, linear, switching, and universal. A single-phase AC power supply has a single voltage component that varies periodically. A three-phase AC power supply has three voltage components that vary periodically, separated by 120 degrees. The output voltage of an unregulated AC power supply varies with changes in input voltage or load. A linear AC power supply uses a transformer and linear regulator to convert and stabilize voltage. A switching AC power supply uses high-frequency switching technology to convert and stabilize voltage. Universal AC power supplies are suitable for general-purpose applications such as home appliances and office equipment. DC power supplies typically include linear, switching, regulator, and integrated DC power supplies. A linear DC power supply consists of a transformer, rectifier, filter, and voltage regulator, directly converting AC voltage to DC. A switching DC power supply consists of a rectifier, filter, switching transistor, control circuit, and protection circuit, regulating the output voltage through the control of the switching transistor. A DC power supply with a regulator tube consists of a transformer, rectifier, filter, regulator tube, and control circuit. It regulates the output voltage by adjusting the on and off times of the regulator tube. An integrated DC power supply, consisting of components such as chips, capacitors, inductors, and diodes, integrates power conversion, filtering, and voltage regulation into a single device. In this application, the type of AC power supply and DC power supply can be selected based on the actual scenario requirements.

[0045] Regarding sensors, they are used to collect the temperature, current, or voltage of target nodes in the energy storage high-voltage box and feed it back to the main control module. For example, the main control module collects and manages all this information through collection nodes on the copper busbar and on the energy storage battery's battery management system (BMU), thereby adjusting the overall energy storage battery strategy, controlling temperature rise, and controlling the speed of charge and discharge. In this application, the sensor can be a Hall effect sensor, but other sensor types can also be selected based on user needs.

[0046] Fuses are protective components that prevent sudden high currents. Fuses monitor the current in a circuit and automatically blow when the current exceeds their rated value, cutting off power and preventing damage to electrical equipment caused by excessive current. This provides effective protection for critical equipment in energy storage high-voltage boxes, such as battery packs and inverters. Fuses can be divided into plug-in fuses, screw-in fuses, enclosed fuses, and resettable fuses. Plug-in fuses are commonly used at the end of lines with voltages of 380V and below, providing short-circuit protection for distribution branches or electrical equipment. Typical examples include the RC series fuse. Screw-in fuses have a blown indicator on the upper end cap. Once the fuse blows, the indicator pops out and can be observed through a glass hole in the ceramic cap. These fuses are commonly used in machine tool electrical control equipment. They have high interrupting currents and can be used for short-circuit protection in circuits with voltages of 500V and below and currents of 200A or less. Typical examples include the RL series fuse. Sealed fuses are divided into two types: filled and unfilled. Filled fuses typically use a square porcelain tube filled with quartz sand and a melt. They offer high breaking capacity and are used in circuits with voltages below 500V and currents below 1kA. Unfilled sealed fuses, with the melt enclosed in a sealed cylinder, have slightly lower breaking capacity and are used in power grids or distribution equipment below 500V and 600A. Typical examples include the RM series unfilled sealed fuses and the RT series filled tube fuses. Resettable fuses use metallic sodium as the melt, which has high conductivity at room temperature. When a short circuit occurs, the short-circuit current generates high temperatures, rapidly vaporizing the sodium. The vaporized sodium exhibits a high resistance, thus limiting the short-circuit current. When the short-circuit current dissipates, the temperature drops, and the metallic sodium resumes its original, high conductivity. Resettable fuses only limit the short-circuit current but cannot actually interrupt the circuit. Their advantage is that the melt does not need to be replaced and they can be reused. A typical example is the RZ series resettable fuse. During redesign, the user can select the specific type of fuse according to their needs.

[0047] In order to facilitate the communication and connection between the energy storage high-voltage box and external devices, the energy storage high-voltage box is also provided with a panel socket, which has a grid interface. The grid interface is used to connect the energy storage high-voltage box to the grid. The grid interface includes B+ and B-. The panel socket also has a data interaction interface for realizing data communication between the energy storage high-voltage box and the host computer. Figure 2 The panel socket may also have a power output interface, which includes a positive power output interface P+ and a negative power output interface P-. The positive power output interface P+ and the negative power output interface P- are used to connect to electrical equipment.

[0048] The circuit breaker, pre-charge contactor, contactor, pre-charge resistor, the positive part of the fuse, and the positive copper busbar together constitute the positive circuit of the high-voltage box. The copper busbar can be formed by bending a T2 copper busbar. One end of the positive circuit is connected to the grid interface B+, and the other end is connected to the positive input terminal of the energy storage battery, for constructing a positive path for the charging circuit of the energy storage battery. The circuit breaker, the negative part of the contactor, and the negative copper busbar together constitute the negative circuit of the high-voltage box. One end of the negative circuit is connected to the grid interface B-, and the other end is connected to the negative input terminal of the energy storage battery, for constructing a negative path for the charging circuit of the energy storage battery. When the grid needs to be used to charge the energy storage battery, the positive circuit and the negative circuit are connected, and the grid charges the energy storage battery through the positive circuit and the negative circuit.

[0049] The input of the inverter is connected to the output of the energy storage battery. The positive power output interface of the energy storage high-voltage box is connected to the inverter's positive output terminal (P+), and the negative power output interface of the energy storage high-voltage box is connected to the inverter's negative output terminal (P-). When the energy storage battery needs to be controlled to discharge power to a consumer, the inverter is activated. Once activated, the inverter converts the DC power output from the energy storage battery into AC power and transmits it to the downstream consumer.

[0050] During operation (including charging and discharging of the energy storage battery), the electrical components within the high-voltage energy storage box are powered by either the AC power supply or the DC power supply. When the AC power supply is functioning properly, the AC power supply is used to power the electrical components within the high-voltage energy storage box. When the AC power supply is unavailable (including due to an AC power failure or a power grid outage), the DC power supply is used to power the electrical components within the high-voltage energy storage box. The parallel operation of the AC and DC power supply allows the internal direct power supply to draw energy from the energy storage battery in the event of an external power grid outage, ensuring continued operation of the internal electrical components without being affected by a power grid outage. This maintains system stability and security, and results in significant economic savings.

[0051] The AC power supply converts AC power to DC power, while the DC power supply converts DC power to DC power of a different voltage. In this solution, the AC power supply can directly obtain high-voltage AC power from the grid interface and convert it to the target DC power. The DC power can directly obtain high-voltage DC power from the copper busbar and convert it to the target DC power. The target DC power is the rated input voltage of the electrical components within the energy storage high-voltage box.

[0052] Optionally, the main control module of the energy storage high voltage box realizes automatic switching between AC power supply and DC power supply at least when the energy storage high voltage box is working. For details, see Figure 2 After the energy storage high-voltage box is started, the main control module detects the power grid status and the fault status of the AC power supply during implementation. If there is AC power input to the power grid interface, it indicates that the power grid is in a power-on state. If the power grid has power and the AC power supply is not faulty, the AC power supply is controlled to supply power to the electrical components inside the energy storage high-voltage box. If there is no AC power input to the power grid interface or the AC power supply is faulty, the DC power supply is controlled to supply power to the electrical components inside the energy storage high-voltage box.

[0053] Optionally, the energy storage high-voltage box may further include: a communication module, which is used to realize data interaction between the main control module and the host computer. The communication module may be a wireless communication module or a wired communication module. At this time, the main control module of the energy storage high-voltage box controls the energy storage battery in the energy storage box and collects the output information of the sensor, while communicating with the host computer through the communication module. Specifically, the status information of the energy storage high-voltage box and the data collected by the sensor can be sent to the host computer. For example, the remaining power of the energy storage battery collected by the sensor can be sent to the host computer.

[0054] In this embodiment, the main control module can also automatically control the charging state of the energy storage high voltage box, see Figure 4In the technical solution disclosed in this embodiment, the high-voltage energy storage box is further configured to: upon detecting the arrival of a first preset time node, determine whether the charge in the energy storage battery is greater than a first preset value; if the charge is less than the first preset value, control the power grid to charge the energy storage battery. In this embodiment, the main control module automatically compares the current time node with the first preset time node. The first preset time node may be a user-configured time node that falls during a low-peak electricity consumption period. When charging the high-voltage energy storage box at this time node, the electricity cost incurred is lower than the electricity cost at other time nodes. In this step, when the first preset time node arrives and the charge in the energy storage battery is less than the first preset value (the energy storage battery needs to be charged), the positive and negative lines are controlled to conduct to control the power grid to charge the energy storage battery. In this embodiment, the first preset time node may be the start time node corresponding to the valley electricity price in the peak-valley electricity price.

[0055] In this embodiment, the main control module can also automatically control the discharge state of the energy storage high voltage box, see Figure 4 In the technical solution disclosed in this embodiment, the high-voltage energy storage box is further configured to: upon detecting the arrival of a second preset time point or a power grid outage, determine whether the remaining charge of the energy storage battery is greater than a second preset value. If so, control the high-voltage energy storage box to discharge power to the electrical device. In this embodiment, the main control module automatically compares the current time point with a second preset time point. The second preset time point may be a user-configured time point that falls during peak electricity consumption periods, when the electricity costs incurred by the electrical device are higher than those at other times. In this step, upon the arrival of the second preset time point, or upon a power grid outage, and when the charge of the energy storage battery is greater than the second preset value (the charge in the energy storage battery is sufficient to ensure normal operation of the electrical device), control the inverter to start and supply power to the electrical device. In this embodiment, the second preset time point may be the start time point corresponding to the peak electricity price in the off-peak electricity price.

[0056] Figure 3 and Figure 4 The corresponding method can be integrated into Figure 5 In the electronic device shown, the electronic device can be integrated into the main control module as an additional module, see Figure 5, the electronic device may include a processor (such as a central processing unit, etc.) 601, which can perform various appropriate actions and processes according to the program stored in the read-only memory (ROM) 602 or the program loaded from the storage device 608 to the random access memory (RAM) 603. When the electronic device is powered on, the RAM 603 also stores various programs and data required for the operation of the electronic device. The processing device 601, the ROM 602 and the RAM 603 are connected to each other through the bus 604. The input / output (I / O) interface 605 is also connected to the bus 604. Typically, the following devices can be connected to the I / O interface 605: an input device 606 including, for example, a touch screen, a touchpad, a keyboard, a mouse, a camera, a microphone, an accelerometer, a gyroscope, etc.; an output device 607 including, for example, a liquid crystal display (LCD), a speaker, a vibrator, etc.; a storage device 608 including, for example, a memory card, a hard disk, etc.; and a communication device 609. The communication device 609 can allow the electronic device to communicate with other devices wirelessly or by wire to exchange data. Although Figure 5 The electronic device is shown with various devices, but it should be understood that it is not required to implement or possess all of the devices shown. More or fewer devices may be implemented or possessed instead.

[0057] In this embodiment, the shell of the energy storage high-voltage box is a metal shell, which is formed by bending sheet metal, and an anti-corrosion layer is sprayed on the surface of the metal shell to prevent the metal shell from being corroded.

[0058] The specific material of the metal shell can be:

[0059] Aluminum alloy offers advantages such as light weight, high strength, excellent corrosion resistance, superior thermal conductivity, and ease of processing and forming. These properties make it an ideal choice for high-voltage energy storage enclosures. Aluminum alloy enclosures can effectively reduce the weight of the entire device while providing sufficient mechanical strength and protection.

[0060] Stainless steel has excellent corrosion resistance, high explosion-proof performance and impermeability. Its structure is complete, the appearance is beautiful, and the surface is easy to clean. It is suitable for occasions with high requirements on material performance.

[0061] Steel: Steel shell has low cost, relatively simple processing technology and good seismic performance.

[0062] Titanium: Titanium shells have excellent corrosion resistance and strength, but the manufacturing cost is high and the processing difficulty is also relatively large.

[0063] In this embodiment, in order to improve the heat dissipation performance of the energy storage high-voltage box, heat dissipation holes are provided on the metal shell of the high-voltage box. The heat dissipation holes can be located directly opposite the high-heat dissipation components in the energy storage high-voltage box. For example, an opening can be designed on the left rear part of the metal shell, and heat dissipation holes can be designed on the right side to optimize the heat dissipation performance of the device, so as to accelerate air circulation and quickly release heat.

[0064] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. Reference can be made to the common and similar parts between the various embodiments. For the devices disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple, and the relevant parts can be referred to the method description.

[0065] The above description of the disclosed embodiments will enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An energy storage high-voltage box, characterized in that: include: Circuit breaker, pre-charge contactor, contactor, pre-charge resistor, DC power supply, AC power supply, fuse, sensor, panel socket, inverter and main control module; The circuit breaker, pre-charge contactor, contactor, pre-charge resistor, positive part of the fuse and positive copper busbar together constitute the positive circuit of the high-voltage box. One end of the positive circuit is connected to the grid interface, and the other end is connected to the positive input terminal of the energy storage battery. The circuit breaker, contactor, negative electrode part of the sensor and the negative copper busbar together constitute the negative circuit of the high-voltage box. One end of the negative circuit is connected to the grid interface, and the other end is connected to the negative input terminal of the energy storage battery. The input end of the inverter is connected to the output end of the energy storage battery; The positive power output interface of the energy storage high-voltage box is connected to the positive output terminal of the inverter, and the negative power output interface of the energy storage high-voltage box is connected to the negative output terminal of the inverter; The AC power supply and the DC power supply are used to supply power to electrical components in the energy storage high-voltage box.

2. The energy storage high-voltage box according to claim 1, characterized in that: The AC power supply is used to obtain high-voltage AC power from the grid interface and convert the high-voltage AC power into target DC power; The DC power supply is used to obtain high-voltage DC power from the copper busbar and convert the high-voltage DC power into target DC power; The target direct current is the rated input voltage of the electrical components inside the energy storage high-voltage box.

3. The energy storage high-voltage box according to claim 2, characterized in that: The main control module of the energy storage high-voltage box is at least used for: when the energy storage high-voltage box is started, if there is AC power input at the grid interface, controlling the AC power supply to supply power to the electrical components inside the energy storage high-voltage box; if there is no AC power input at the grid interface, controlling the DC power supply to supply power to the electrical components inside the energy storage high-voltage box.

4. The energy storage high-voltage box according to claim 3, characterized in that: Also includes: A communication module, which is used to implement data exchange between the main control module and the host computer; The main control module of the energy storage high-voltage box is also used to control the energy storage battery in the energy storage box and collect the output information of the sensor, and communicate with the host computer.

5. The energy storage high-voltage box according to claim 3, characterized in that: The main control module is also used for: When the arrival of the first preset time node is detected, determining whether the power in the energy storage battery is greater than a first preset value; When the value is less than a first preset value, the power grid is controlled to charge the energy storage battery.

6. The energy storage high-voltage box according to claim 5, characterized in that: The first preset time node is the starting time node corresponding to the valley electricity price in the peak-valley electricity price.

7. The energy storage high-voltage box according to claim 3, characterized in that: The energy storage high-voltage box is also used for: When the arrival of the second preset time node is detected, or when the power grid is detected to be off, it is determined whether the remaining power of the energy storage battery is greater than the second preset value. When it is greater than the second preset value, the energy storage high-voltage box is controlled to discharge to the electrical equipment.

8. The energy storage high-voltage box according to claim 7, characterized in that: The second preset time node is the starting time node corresponding to the peak electricity price in the peak-valley electricity price.

9. The energy storage high-voltage box according to claim 1, characterized in that: The sensor includes one or more of a current sensor, a voltage sensor, and a temperature sensor.

10. The energy storage high-voltage box according to claim 1, characterized in that: The shell of the energy storage high-voltage box is a metal shell sprayed with an anti-corrosion layer.

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