Direct-current high-voltage household energy storage box

Abstract

The invention provides a direct-current high-voltage household energy storage box which comprises a cabinet body, a power distribution system and a temperature control system are arranged in the cabinet body, the temperature control system comprises an industrial air conditioner, the industrial air conditioner is electrically connected with a direct-current-direct-current converter, and the industrial air conditioner is powered by stored power in a battery pack after being converted by the direct-current-direct-current converter and a management system. Wherein the in-cabin energy management system obtains total electricity utilization information in real time, the total electricity utilization information comprises external electricity taking quantity information and in-cabin power supply quantity information, and meanwhile the in-cabin energy management system obtains in-cabin total temperature information in real time; the total temperature information comprises shell temperature information of each battery box, sub-area temperature information in the box and temperature information at the position of a cabinet door heat dissipation hole, and the in-cabin energy management system sends corresponding working signals to the industrial air conditioner, the battery pack and the high-voltage box according to the total power consumption information and the total temperature information.

Description

Technical Field

[0001] The present invention relates to the technical field of household energy storage boxes, and in particular to a direct current high-voltage household energy storage box. Background Art

[0002] The high-voltage box of the energy storage system is a high-voltage power circuit control unit designed for the energy storage system. The high-voltage box is responsible for connecting the energy storage battery pack to the external power system to realize the input and output of electric energy. It can receive electric energy from the power grid or renewable energy power generation system and store it in the energy storage battery; at the same time, it can also transmit the electric energy in the energy storage battery back to the power grid or supply it to the load. Distribute the electric energy and distribute the high-voltage electric energy to different electrical equipment and systems to ensure the normal operation of each part.

[0003] The energy storage high-voltage box is usually placed in a cool environment, and the heat is dissipated through the heat dissipation holes on the outer shell of the box. With the development, there are now higher requirements for the speed and quality of construction on the construction site. In order to reduce the lines that need to be connected to the mains before construction, the energy storage high-voltage box is gradually expanded to the power distribution on the construction site. However, the buildings on the construction site are mainly prefabricated houses, which lack a sufficiently cool and ventilated environment for the storage of traditional energy storage high-voltage boxes.

[0004] Therefore, there is an urgent need for an energy storage high-voltage box with excellent heat dissipation performance. Summary of the invention

[0005] In order to solve the above problems, the present invention provides a DC high voltage household energy storage box, which is implemented as follows:

[0006] A DC high-voltage household energy storage box comprises a cabinet, wherein the cabinet is divided into a control cabin located at the top and a battery cabin located at the bottom by a horizontally arranged partition, the cabinet is rotatably provided with an openable and closable cabinet door, the cabinet door is provided with heat dissipation holes, and the cabinet is provided with:

[0007] A power distribution system, the power distribution system comprising a battery pack and a DC-DC converter, the battery pack comprising a plurality of battery boxes stacked in the battery compartment, the DC-DC converter being arranged in the control compartment, the DC-DC converter being electrically connected to the battery pack, and the DC-DC converter being used to supply power to the outside through a connector to the stored electricity in the battery pack;

[0008] A temperature control system, the temperature control system comprising an industrial air conditioner, the industrial air conditioner being electrically connected to the DC-DC converter, the industrial air conditioner being powered by electricity stored in the battery pack after being converted by the DC-DC converter;

[0009] A management system, wherein the management system includes a battery management system and an in-cabin energy management system, wherein the battery management system includes a high-voltage box disposed in the control cabin, wherein a battery management system master control is built in the high-voltage box, wherein the battery management system master control is communicatively connected to a battery management system slave control built in the battery box, and the in-cabin energy management system is communicatively connected to the battery pack, the DC-DC converter, the high-voltage box, and the industrial air conditioner, respectively;

[0010] Among them, the in-cabin energy management system obtains the total power consumption information in real time, and the total power consumption information includes the external power supply information and the in-cabin power supply information. At the same time, the in-cabin energy management system obtains the total temperature information in the cabin in real time, and the total temperature information includes the outer shell temperature information of each battery box, the temperature information of the different areas in the box, and the temperature information at the heat dissipation holes of the cabinet door. The in-cabin energy management system sends corresponding working signals to the industrial air conditioner, battery pack and high-voltage box according to the total power consumption information and the total temperature information.

[0011] As a further improvement, the power distribution system further includes a 24V backup battery, and the DC-DC converter specifically includes:

[0012] 24V DC-DC converter, the 24V DC-DC converter is electrically connected to the 24V backup battery and the battery pack respectively, the 24V backup battery provides power to the temperature control system and the management system in the cabinet compartment through the 24V DC-DC converter, and the 24V backup battery is charged and supplemented by the battery pack through the 24V DC-DC converter;

[0013] A 48V DC-DC converter, wherein the 48V DC-DC converter is electrically connected to the industrial air conditioner and the battery pack, respectively, and the industrial air conditioner is powered by the battery pack through the 48V DC-DC converter;

[0014] A 100KW DC-DC converter, the 100KW DC-DC converter is electrically connected to a high-voltage box and a connector respectively, the high-voltage box is electrically connected to the battery pack, the 100KW DC-DC converter obtains the stored electricity in the battery pack through the high-voltage box and then supplies power to the outside through the connector.

[0015] As a further improvement, the battery management system adopts a two-level architecture, and the battery management system slave control serves as a first-level slave control to collect the battery cell voltage information and battery cell temperature information in each of the battery boxes;

[0016] The battery management system master controller serves as a secondary master controller, collects the battery information collected and uploaded by the battery management system from the control center, collects the battery pack voltage, temperature, current, and total voltage information, and performs leakage detection and power-off protection when the status is abnormal.

[0017] As a further improvement, the in-cabin energy management system uploads data to the monitoring and dispatching center through a built-in 4G module.

[0018] As a further improvement, it comprises two openable and closable cabinet doors, the two cabinet doors are respectively arranged on the left and right sides of the cabinet body, and the industrial air conditioner is embedded in the cabinet door on the side surface of the battery box where the joint is arranged;

[0019] An operation screen is provided on the front surface of the cabinet, and the operating system of the management system is displayed on the operation screen. The operation screen is used to receive operation instructions manually input by a staff member.

[0020] As a further improvement, the industrial air conditioner includes a compressor, an external cabinet inlet fan located on one side of the outer wall of the cabinet door, and an internal cabinet outlet fan located on one side of the inner wall of the cabinet door. The outlet / inlet of the internal cabinet outlet fan and the external cabinet inlet fan are respectively provided with two groups of heat sink groups. A duct mechanism is also provided on the inner wall of the cabinet door. The duct mechanism includes a cover body, and the cover body covers the internal cabinet outlet fan and the heat sink group located on one side of the inner wall of the cabinet door. A plurality of air ducts are provided on a surface of the cover body away from the cabinet door, and the air ducts correspond to a plurality of battery boxes respectively.

[0021] The beneficial effects of the present invention are:

[0022] 1. A new temperature control system is added to the energy storage box. In addition to ventilation and heat dissipation by opening shutter heat dissipation vents at the corresponding positions of the hatch and the control cabin, an industrial air conditioner is also built in. This also makes the use of the energy storage box more flexible and more suitable for use in construction sites. The number of energy storage boxes to be equipped can be comprehensively considered based on multiple factors such as the construction site, office location, and construction project.

[0023] 2. After the industrial air conditioner is built in, the overall amount of data and information inside the power storage box increases, which in turn increases the difficulty of supervision. Therefore, a management system including a battery management system and an in-cabin management system is built in. Among them, the battery management system includes a high-voltage box arranged in the control cabin, and the high-voltage box is equipped with a battery management system master control. The battery management system master control is connected to the battery management system slave control built in the battery box. The in-cabin energy management system is connected to the battery pack, DC-DC converter, high-voltage box and industrial air conditioner respectively, and the total power consumption information is obtained as a whole. The in-cabin management system obtains the total power consumption information in real time, and the total power consumption information includes the external power consumption information and the in-cabin power supply power consumption information. At the same time, the in-cabin energy management system obtains the total temperature information in the cabin in real time, and the total temperature information includes the outer shell temperature information of each battery box, the temperature information of the sub-area in the box, and the temperature information at the heat dissipation hole position of the cabinet door. The in-cabin energy management system sends corresponding working signals to the industrial air conditioner, battery pack and high-voltage box according to the total power consumption information and the total temperature information. According to the actual power consumption and temperature conditions, the use of the battery box and the heat dissipation intensity of the temperature control system are regulated. It meets the current national requirements for clean energy and energy-saving construction sites. At the same time, it also increases the service life of the battery box and reduces environmental pollution. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the overall structure of the cabinet door with an industrial air conditioner when the present invention is unfolded.

[0025] Figure 2 The front view of the cabinet door with the industrial air conditioner is unfolded according to the present invention.

[0026] Figure 3 It is a schematic diagram of the heat dissipation of industrial air conditioners in the temperature control system of the present invention.

[0027] Figure 4 It is a schematic diagram of the module structure connection of the present invention. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are 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. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention.

[0029] In the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying 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 one or more of the features.

[0030] A DC high-voltage household energy storage box comprises a cabinet, wherein the cabinet is divided into a control cabin located at the top and a battery cabin located at the bottom by a horizontally arranged partition, the cabinet is rotatably provided with an openable and closable cabinet door, the cabinet door is provided with heat dissipation holes, and the cabinet is provided with:

[0031] A power distribution system, the power distribution system comprising a battery pack and a DC-DC converter, the battery pack comprising a plurality of battery boxes stacked in the battery compartment, the DC-DC converter being arranged in the control compartment, the DC-DC converter being electrically connected to the battery pack, and the DC-DC converter being used to supply power to the outside through a connector to the stored electricity in the battery pack;

[0032] A temperature control system, the temperature control system comprising an industrial air conditioner, the industrial air conditioner being electrically connected to the DC-DC converter, the industrial air conditioner being powered by electricity stored in the battery pack after being converted by the DC-DC converter;

[0033] A management system, wherein the management system includes a battery management system and an in-cabin energy management system, wherein the battery management system includes a high-voltage box disposed in the control cabin, wherein a battery management system master control is built in the high-voltage box, wherein the battery management system master control is communicatively connected to a battery management system slave control built in the battery box, and the in-cabin energy management system is communicatively connected to the battery pack, the DC-DC converter, the high-voltage box, and the industrial air conditioner, respectively;

[0034] Among them, the in-cabin energy management system obtains the total power consumption information in real time, and the total power consumption information includes the external power supply information and the in-cabin power supply information. At the same time, the in-cabin energy management system obtains the total temperature information in the cabin in real time, and the total temperature information includes the outer shell temperature information of each battery box, the temperature information of the different areas in the box, and the temperature information at the heat dissipation holes of the cabinet door. The in-cabin energy management system sends corresponding working signals to the industrial air conditioner, battery pack and high-voltage box according to the total power consumption information and the total temperature information.

[0035] Among them, the performance of the high-voltage household energy storage box provided by the present invention is shown in Table 1:

[0036] Table 1.

[0037] project parameter Output Power 20kW Total energy storage 46kWh Output voltage DC 750V Battery Type Lithium Iron Phosphate Single battery specifications 3.2V100Ah Series-parallel connection 1P144S Allowable altitude ≤2000m Operating temperature -20～50℃ Working environment humidity RH5~85% Protection level IP54 weight 620kg Size (length*width*height) 1000*940*1680mm

[0038] The performance of the battery box used in the high-voltage household energy storage box provided by the present invention is shown in Table 2:

[0039] Table 2.

[0040]

[0041] The cell performance of the battery box used in the high-voltage household energy storage box provided by the present invention is shown in Table 3:

[0042] Table 3.

[0043]

[0044]

[0045] It can be seen from Tables 1, 2 and 3 that the battery pack of the high-voltage household energy storage box provided by the present invention is applicable to a wider range of temperatures as a whole, and has better discharge performance and service life at room temperature. Therefore, the high-voltage household energy storage box provided by the present invention has higher temperature control requirements.

[0046] As a further improvement, the power distribution system further includes a 24V backup battery, and the DC-DC converter specifically includes:

[0047] 24V DC-DC converter, the 24V DC-DC converter is electrically connected to the 24V backup battery and the battery pack respectively, the 24V backup battery provides power to the temperature control system and the management system in the cabinet compartment through the 24V DC-DC converter, and the 24V backup battery is charged and supplemented by the battery pack through the 24V DC-DC converter;

[0048] A 48V DC-DC converter, wherein the 48V DC-DC converter is electrically connected to the industrial air conditioner and the battery pack, respectively, and the industrial air conditioner is powered by the battery pack through the 48V DC-DC converter;

[0049] A 100KW DC-DC converter, the 100KW DC-DC converter is electrically connected to a high-voltage box and a connector respectively, the high-voltage box is electrically connected to the battery pack, the 100KW DC-DC converter obtains the stored electricity in the battery pack through the high-voltage box and then supplies power to the outside through the connector.

[0050] As a further improvement, the battery management system adopts a two-level architecture, and the battery management system slave control serves as a first-level slave control to collect the battery cell voltage information and battery cell temperature information in each of the battery boxes;

[0051] The battery management system master controller serves as a secondary master controller, collects the battery information collected and uploaded by the battery management system from the control center, collects the battery pack voltage, temperature, current, and total voltage information, and performs leakage detection and power-off protection when the status is abnormal.

[0052] As a further improvement, the in-cabin energy management system uploads data to the monitoring and dispatching center through a built-in 4G module.

[0053] As a further improvement, it comprises two openable and closable cabinet doors, the two cabinet doors are respectively arranged on the left and right sides of the cabinet body, and the industrial air conditioner is embedded in the cabinet door on the side surface of the battery box where the joint is arranged;

[0054] An operation screen is provided on the front surface of the cabinet, and the operating system of the management system is displayed on the operation screen. The operation screen is used to receive operation instructions manually input by a staff member.

[0055] As a further improvement, the industrial air conditioner includes a compressor, an external cabinet inlet fan located on one side of the outer wall of the cabinet door, and an internal cabinet outlet fan located on one side of the inner wall of the cabinet door. The outlet / inlet of the internal cabinet outlet fan and the external cabinet inlet fan are respectively provided with two groups of heat sink groups. A duct mechanism is also provided on the inner wall of the cabinet door. The duct mechanism includes a cover body, and the cover body covers the internal cabinet outlet fan and the heat sink group located on one side of the inner wall of the cabinet door. A plurality of air ducts are provided on a surface of the cover body away from the cabinet door, and the air ducts correspond to a plurality of battery boxes respectively.

[0056] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A DC high-voltage household energy storage box, comprising a cabinet, characterized in that: The interior of the cabinet is divided into a control cabin located at the top and a battery cabin located at the bottom by a horizontally arranged partition. The cabinet is rotatably provided with a cabinet door that can be opened and closed. The cabinet door is provided with heat dissipation holes. The cabinet is provided with: A power distribution system, the power distribution system comprising a battery pack and a DC-DC converter, the battery pack comprising a plurality of battery boxes stacked in the battery compartment, the DC-DC converter being arranged in the control compartment, the DC-DC converter being electrically connected to the battery pack, and the DC-DC converter being used to supply power to the outside through a connector to the stored electricity in the battery pack; A temperature control system, the temperature control system comprising an industrial air conditioner, the industrial air conditioner being electrically connected to the DC-DC converter, the industrial air conditioner being powered by electricity stored in the battery pack after being converted by the DC-DC converter; A management system, wherein the management system includes a battery management system and an in-cabin energy management system, wherein the battery management system includes a high-voltage box disposed in the control cabin, wherein a battery management system master control is built in the high-voltage box, wherein the battery management system master control is communicatively connected to a battery management system slave control built in the battery box, and the in-cabin energy management system is communicatively connected to the battery pack, the DC-DC converter, the high-voltage box, and the industrial air conditioner, respectively; Among them, the in-cabin energy management system obtains the total power consumption information in real time, and the total power consumption information includes the external power supply information and the in-cabin power supply information. At the same time, the in-cabin energy management system obtains the total temperature information in the cabin in real time, and the total temperature information includes the outer shell temperature information of each battery box, the temperature information of the different areas in the box, and the temperature information at the heat dissipation holes of the cabinet door. The in-cabin energy management system sends corresponding working signals to the industrial air conditioner, battery pack and high-voltage box according to the total power consumption information and the total temperature information.

2. A DC high voltage household energy storage box as claimed in claim 1, characterized in that: The power distribution system also includes a 24V backup battery, and the DC-DC converter specifically includes: 24V DC-DC converter, the 24V DC-DC converter is electrically connected to the 24V backup battery and the battery pack respectively, the 24V backup battery provides power to the temperature control system and the management system in the cabinet compartment through the 24V DC-DC converter, and the 24V backup battery is charged and supplemented by the battery pack through the 24V DC-DC converter; A 48V DC-DC converter, wherein the 48V DC-DC converter is electrically connected to the industrial air conditioner and the battery pack, respectively, and the industrial air conditioner is powered by the battery pack through the 48V DC-DC converter; A 100KW DC-DC converter, the 100KW DC-DC converter is electrically connected to a high-voltage box and a connector respectively, the high-voltage box is electrically connected to the battery pack, the 100KW DC-DC converter obtains the stored electricity in the battery pack through the high-voltage box and then supplies power to the outside through the connector.

3. A DC high voltage household energy storage box as claimed in claim 1, characterized in that: The battery management system adopts a two-level architecture, and the battery management system slave controller serves as a first-level slave controller to collect the battery cell voltage information and battery cell temperature information in each battery box; The battery management system master controller serves as a secondary master controller, collects the battery information collected and uploaded by the battery management system from the control center, collects the battery pack voltage, temperature, current, and total voltage information, and performs leakage detection and power-off protection when the status is abnormal.

4. A DC high voltage household energy storage box as claimed in claim 3, characterized in that: The in-cabin energy management system uploads data to the monitoring and dispatching center through the built-in 4G module.

5. A DC high voltage household energy storage box as claimed in claim 1, characterized in that: It comprises two openable and closable cabinet doors, which are respectively arranged on the left and right sides of the cabinet body, and the industrial air conditioner is embedded in the cabinet door on the side surface of the battery box where the connector is arranged; An operation screen is provided on the front surface of the cabinet, and the operating system of the management system is displayed on the operation screen. The operation screen is used to receive operation instructions manually input by a staff member.

6. A DC high voltage household energy storage box as claimed in claim 5, characterized in that: The industrial air conditioner includes a compressor, an external cabinet inlet fan located on one side of the outer wall of the cabinet door, and an internal cabinet outlet fan located on one side of the inner wall of the cabinet door. The outlet / inlet of the internal cabinet outlet fan and the external cabinet inlet fan are respectively provided with two groups of heat sink groups. The inner wall of the cabinet door is also provided with an air duct mechanism, and the air duct mechanism includes a cover body, and the cover body covers the internal cabinet outlet fan and the heat sink group located on one side of the inner wall of the cabinet door. A plurality of air ducts are provided on a surface of the cover body away from the cabinet door, and the air ducts correspond to a plurality of battery boxes respectively.

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