Energy storage high-voltage box

Abstract

The invention 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 invention relates to the field of energy storage, and in particular to an energy storage high-voltage box. Background Art

[0002] In recent years, due to the needs of economic development, energy issues have become an increasingly important issue, and electricity is a key part of it. In terms of power plants: there is a large difference in electricity consumption during the day and at night, resulting in tight electricity consumption during the day and too much surplus electricity at night. In factories, due to peak and valley prices, energy costs remain high. Under this circumstance, the energy storage industry has emerged as a new force. In power plants, it can meet the needs of adjusting differences. In factories, energy storage equipment can be used for charging at night and discharging during the day, saving electricity expenditure costs and improving corporate benefits.

[0003] The energy storage high-voltage box is a high-voltage power circuit management unit specially designed for the energy storage system. 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 electric 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 power grid and uses the power grid as a power supply to control its own working state. When the power grid is cut off, the energy storage high-voltage box is cut off and stops working. Summary of the invention

[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 embodiments of the present invention provide the following technical solutions:

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

[0008] Circuit breakers, pre-charge contactors, contactors, pre-charge resistors, DC power supplies, AC power supplies, fuses, sensors, panel jacks, inverters and main control modules;

[0009] The circuit breaker, pre-charging contactor, contactor, pre-charging 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, the contactor, the negative electrode part of the sensor and the negative copper busbar together constitute the negative electrode circuit of the high-voltage box, one end of the negative electrode 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 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 the grid interface has AC power input, controlling the AC power supply to power the electrical components inside the energy storage high-voltage box; if the grid interface has no AC power input, controlling the DC power supply to power 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 is used to realize 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 also used for:

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

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

[0023] Optionally, in the above energy storage high-voltage box, the first preset time node is a 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 also 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 working, 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. When the external power grid is out of power, the internal direct power supply can take the power of the energy storage battery to supply the internal electrical components to continue to operate, which is not affected by the power outage of the power grid, 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 drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0031] Figure 1 A schematic diagram of the structure of the energy storage high-voltage box disclosed in the embodiment of the present application;

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

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

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

[0035] Figure 5 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 described embodiments 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 creative work are within the scope of protection of the present invention.

[0037] In order to ensure that the energy storage high-voltage box can 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 configured with 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 supply power to the electrical components in the high-voltage energy storage box.

[0038] Figure 1 The schematic diagram of the structure of the energy storage high-voltage box disclosed in the embodiment of the present application is a high-voltage energy storage box, wherein the internal modules of the high-voltage energy storage box may include but are not limited to:

[0039] Circuit breaker 1, pre-charging contactor 2, contactor 3, pre-charging 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 circuit breaker to trip 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, the contactor is used to realize the 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 type of 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-charging circuit, in order to achieve safe charging of the energy storage high-voltage box, the energy storage high-voltage box is equipped with a pre-charging circuit. The pre-charging circuit is designed to pre-charge the system in a safe and controllable manner before the main circuit is officially connected, so as to avoid large currents directly impacting system components and protect the safety and stability of the entire circuit. This mechanism mainly relies on two core components, the pre-charging contactor and the pre-charging resistor, which work together to achieve the pre-charging process. The pre-charging contactor is an electrical switch used to control the on and off of the pre-charging circuit. During the pre-charging process, the pre-charging contactor is in a closed state, allowing current to pass through the pre-charging circuit. Once the pre-charging is completed, the pre-charging contactor may be disconnected to isolate the pre-charging circuit from the main circuit, or in some designs, it may remain closed and continue to work as part of the main circuit. The selection of the pre-charging contactor is usually based on the voltage, current, and required switching speed that it can withstand. In the high-voltage energy storage box, these parameters are particularly important to ensure that the contactor can still work reliably in harsh working environments. The pre-charging resistor is a key component in the pre-charging circuit, which is used to limit the current during the pre-charging 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. Due to the presence of the resistor, the charging current is limited to a lower level, thereby avoiding damage to the element caused by a large current shock. The selection of the resistance value of the pre-charge resistor requires comprehensive consideration of multiple factors, including the capacity of the energy storage element, the allowable charging time, and the desired charging current. A resistance value that is too large may result in a long charging time, while a resistance value that is too small may not effectively limit the charging current. Before the entire circuit is powered on, the pre-charge contactor is closed and the power supply charges the energy storage element through the pre-charge resistor. Due to the limiting effect of the pre-charge resistor, the charging current is kept at a low and controllable level. As the voltage of the energy storage element gradually increases, the charging current gradually decreases. When the voltage of the energy storage element approaches the power supply voltage, the pre-charging process is basically completed. At this point, you can choose whether to disconnect the pre-charge contactor or keep it closed according to the system design. If the pre-charge contactor is disconnected, the main circuit can be safely connected; if it remains closed, the pre-charge circuit will continue to work as part of the main circuit.

[0043] Regarding the main control module, the main control module in the battery high-voltage box is the core of the system. It integrates data acquisition and processing, system control and management, communication and data exchange, and system optimization and upgrade functions. The main control module is responsible for collecting various key parameters of the battery pack, including voltage, current, temperature, etc., to achieve real-time monitoring of the battery status. By analyzing and processing the collected data, the main control module can evaluate the health status, remaining power (SOC) and performance status (SOH) of the battery, providing a basis for subsequent decision-making. The main control module can also intelligently regulate the battery charging and discharging process according to the battery status and external environmental conditions, ensure that the battery operates under optimal conditions, and extend the battery life. At the same time, when it detects abnormalities in the battery pack or single cell (such as overvoltage, undervoltage, overcurrent, overtemperature, etc.), the main control module will immediately start the protection mechanism, such as current reduction, power off, etc., to prevent accidents. In addition, the main control module can also communicate with the host computer, exchange data with the host computer, upload the device status information of the energy storage high-voltage box, and receive data instructions sent by the host computer.

[0044] Regarding the power supply, the power supply in the energy storage high-voltage box is divided into an AC power supply and a DC power supply. The AC power supply is powered by an external power grid, and the DC power supply is directly powered by an internal battery. The AC power supply and the DC power supply are used to provide power to the electrical components inside the entire high-voltage box. The AC power supply may include: an input circuit, a voltage regulating circuit, a control circuit, and an output circuit. The input circuit is used to receive an AC input from an external power grid, and usually includes an input filter to suppress external noise and electromagnetic interference to ensure the purity of the input signal. The voltage regulating circuit is used to: transform the input AC voltage, change its voltage level, and provide electrical isolation. The voltage regulating circuit is used to change the size of the output voltage to meet the power supply requirements of the internal components of the high-voltage box. The control circuit is the core part of the AC power supply, which includes a feedback loop and some control elements. The control circuit generates an error signal by monitoring the output voltage and comparing it with the set reference voltage. The error signal is used to adjust the output of the voltage regulating circuit to ensure the stability of the output voltage. The output circuit is used to provide a stable AC power output for the internal electrical components of the high-voltage box. AC Power Supply refers to a power supply device that can provide alternating current (AC for short). According to different standards, AC power supplies can be divided into the following types: single-phase AC power supply, three-phase AC power supply, regulated AC power supply, unregulated AC power supply, linear AC power supply, switching AC power supply and universal AC power supply. Single-phase AC power supply means that the voltage of the power supply has only one component that changes periodically in time. Three-phase AC power supply means that the voltage of the power supply has three components that change periodically in time, and these three components are 120 degrees apart from each other. The output voltage of an unregulated AC power supply will change with the change of input voltage or load. Linear AC power supply uses transformers and linear regulators to achieve voltage conversion and stability. Switching AC power supply uses high-frequency switching technology to achieve voltage conversion and stability. Universal AC power supply is suitable for general-purpose AC power supply, such as household appliances, office equipment, etc. DC power supplies usually include linear DC power supply, switching DC power supply, regulating tube DC power supply and integrated DC power supply. Linear DC power supply consists of transformer, rectifier, filter and voltage regulator, etc., and directly converts AC voltage into DC voltage. Switching DC power supply consists of rectifier, filter, switch tube, control circuit and protection circuit, etc., and adjusts the output voltage through the control of the switch tube. The adjustment tube DC power supply is composed of a transformer, a rectifier, a filter, an adjustment tube and a control circuit. The output voltage is adjusted by adjusting the on and off time of the adjustment tube. The integrated DC power supply is composed of components such as chips, capacitors, inductors and diodes. It is a DC power supply that integrates power conversion, filtering, voltage stabilization and other functions in one device. In this application, the types of AC power supply and DC power supply can be selected according to the actual scene requirements.

[0045] Regarding the sensor, the sensor is used to collect the temperature, current or voltage of the target node 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 information through the collection nodes on the copper bus and the collection nodes on the battery management system BMU system of the energy storage battery, so as to adjust the strategy of the entire energy storage battery, control the temperature rise, and control the speed of charging and discharging. In this application, the sensor can be a Hall sensor, and of course other types of sensors can be selected according to user needs.

[0046] About fuses, prevent instantaneous large currents and fuse protection components. Fuses can monitor the current in the circuit. When the current exceeds its rated value, it will automatically blow, thereby cutting off the power supply and preventing excessive current from damaging electrical equipment. This provides effective protection for key equipment in energy storage high-voltage boxes, such as battery packs, inverters, etc. Fuses can be divided into plug-in fuses, spiral fuses, enclosed fuses, self-resetting fuses, etc. Plug-in fuses are often used at the end of lines with voltage levels of 380V and below, as short-circuit protection for distribution branches or electrical equipment. Typical representatives include RC series fuses. The upper end cover on the fuse of the spiral fuse has a fuse indicator. Once the fuse blows, the indicator pops up immediately and can be observed through the glass hole on the porcelain cap. It is often used in machine tool electrical control equipment, with a large breaking current, and can be used for short-circuit protection in circuits with voltage levels of 500V and below and current levels of 200A and below. Typical representatives include RL series fuses. Sealed fuses are divided into two types: filled fuses and unfilled fuses. Filled fuses generally use square porcelain tubes, filled with quartz sand and fuses, with strong breaking capacity, and are used in circuits with voltage levels below 500V and current levels below 1KA. Unfilled sealed fuses are filled with fuses in closed cylinders, with slightly smaller breaking capacity, and are used in power grids or distribution equipment below 500V and 600A. Typical representatives include RM series unfilled sealed fuses and RT series filled tube fuses. Self-resetting fuses use metallic sodium as the fuse, which has high conductivity at room temperature. When a short circuit occurs in the circuit, the short circuit current generates high temperature to rapidly vaporize the sodium, and the vaporized sodium presents a high resistance state, thereby limiting the short circuit current. When the short circuit current disappears, the temperature drops, and the metallic sodium restores its original good conductivity. Self-resetting fuses can only limit the short circuit current, but cannot really break the circuit. Its advantage is that it does not need to replace the fuse and can be reused. A typical example is the RZ series self-resetting fuse. During the design, the user can select the specific type of the fuse according to the requirements.

[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, and the panel socket has a power grid interface, which is used to connect the energy storage high-voltage box to the power grid. The power 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, see 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-, and 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 the 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, which is used to construct the positive path of the charging circuit of the energy storage battery. The negative part of the circuit breaker, 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, which is used to construct the negative path of 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 turned on, and the grid charges the energy storage battery through the positive circuit and the negative circuit.

[0049] 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 end P+ of the inverter, and the negative power output interface of the energy storage high-voltage box is connected to the negative output end P- of the inverter. When it is necessary to control the energy storage battery to discharge the electrical equipment, the inverter is started. After the inverter is started, the DC power output by the energy storage battery is inverted into AC power and sent to the subsequent electrical equipment.

[0050] When the energy storage high-voltage box is working (including charging and discharging of the energy storage battery), 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 (including circuit AC power failure or power outage in the power grid), 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 parallel. When the external power grid is out of power, the internal direct power supply can draw power from the energy storage battery to supply the internal electrical components to continue to operate, which is not affected by the power outage in the power grid, can maintain the stability and safety of the system, and save economic benefits to a certain extent.

[0051] The function of the AC power supply is to convert AC power into DC power, and the function of the DC power supply is to convert DC power into DC power of other voltages. In this solution, the AC power supply can directly obtain high-voltage AC power from the grid interface and convert the high-voltage AC power into target DC power; the DC power can directly obtain high-voltage DC power from the copper bus and convert the high-voltage DC power into target DC power. The target DC power is the rated input voltage of the electrical components inside 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 state and the fault state of the AC power supply during implementation. If the power grid interface has AC input, it indicates that the power grid is in a powered 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 the power grid interface has no AC input, 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, and 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 communicates with the host computer through the communication module while controlling the energy storage battery in the energy storage box and collecting the output information of the sensor. 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 energy storage high-voltage box is also used to: when the arrival of the first preset time node is detected, determine whether the power in the energy storage battery is greater than the first preset value; when it 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 can be a time node pre-configured by the user. The first preset time node is located in the low-peak period of electricity consumption. When the energy storage high-voltage box is charged at this time node, the electricity cost generated is lower than the electricity cost at other time nodes. In this step, when the first preset time node arrives and the power of the energy storage battery is lower than the first preset value (the energy storage battery needs to be charged), the positive and negative lines are controlled to be turned on to control the power grid to charge the energy storage battery. In this embodiment, the first preset time node can be the starting 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 energy storage high-voltage box is also used to: when the arrival of the second preset node is detected, or when the power grid is detected to be off, determine whether the remaining power of the energy storage battery is greater than the second preset value, and when it is greater than the second preset value, control the energy storage high-voltage box to discharge to the power-consuming device. In this embodiment, the main control module automatically compares the current time node with the second preset time node. The second preset time node can be a time node pre-configured by the user. The second preset time node is located during the peak power consumption period. The electricity cost generated when the power-consuming device uses electricity at this time node is higher than the electricity cost at other time nodes. In this step, when the second preset time node arrives, or the power grid is off, and the power of the energy storage battery is greater than the second preset value (the power in the energy storage battery is sufficient to ensure the normal operation of the power-consuming device), the inverter is controlled to start and supply power to the power-consuming device. In this embodiment, the second preset time node can be the starting time node corresponding to the peak electricity price in the peak-valley 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 wired to exchange data. Although Figure 5 An electronic device having various devices is shown, but it should be understood that it is not required to implement or possess all 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 in order to prevent the metal shell from being corroded, an anti-corrosion layer is sprayed on the surface of the metal shell.

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

[0059] Aluminum alloy has the advantages of light weight, high strength, good corrosion resistance, excellent thermal conductivity, and easy processing and forming. These characteristics make aluminum alloy one of the ideal choices for the shell of energy storage high-voltage box. Aluminum alloy shell can effectively reduce the weight of the entire equipment while providing sufficient mechanical strength and protection performance.

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

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

[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 to the high heat release 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] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part.

[0065] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be 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 will not be limited to the embodiments shown herein, but rather 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 breakers, pre-charge contactors, contactors, pre-charge resistors, DC power supplies, AC power supplies, fuses, sensors, panel jacks, inverters and main control modules; The circuit breaker, pre-charging contactor, contactor, pre-charging 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 electrode circuit of the high-voltage box, one end of the negative electrode 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 power 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 to the grid interface, controlling the AC power supply to power the electrical components inside the energy storage high-voltage box; if there is no AC power input to the grid interface, controlling the DC power supply to power 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 realize data interaction 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 the first preset value; When it 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 a 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 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 a 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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