Container type energy storage device and system

Abstract

The invention discloses a container type energy storage device and system, and relates to the technical field of energy storage. The container type energy storage device comprises a three-phase commercial power access end; an energy storage device; a master control device; the input end of the voltage detection device is electrically connected with the three-phase mains supply access end, the output end of the voltage detection device is electrically connected with the main control device, and the voltage detection device is used for outputting a mains supply detection signal; the input end of the static switching device is electrically connected with the three-phase mains supply access end and the energy storage device, and the output end of the static switching device is electrically connected with the load access end; wherein the main control device is used for controlling the static switching device to connect or disconnect a path between the three-phase commercial power access end and / or the energy storage device and the load access end according to the commercial power detection signal. The invention aims to improve the working stability of the energy storage device.

Description

Technical Field

[0001] The present invention relates to the field of energy storage technology, and in particular to a container-type energy storage device and system. Background Art

[0002] With the rapid development of renewable energy, an independent power storage system that integrates power generation, energy storage and power management functions has been widely used in remote areas, emergency rescue and microgrids. However, the existing energy storage system has the problem of slow power switching speed, that is, when there is a fault in the power grid, the existing energy storage system takes a long time to switch from grid-connected mode to off-grid mode, which will cause power supply interruption to critical loads. Some loads are extremely sensitive to the stability of the power supply, and any short power outage may cause data loss, equipment failure or even serious safety accidents.

[0003] In addition, the existing energy storage system has the problem of slow backup power switching speed in off-grid mode, which will cause the units in the energy storage system that require power supply to fail, and the energy storage system will not be able to work stably when there is a fault in the power grid. Summary of the invention

[0004] The main purpose of the present invention is to provide a container-type energy storage device and system, aiming to improve the working stability of the energy storage device.

[0005] In order to achieve the above-mentioned object, the present invention proposes a container-type energy storage device, wherein the container-type energy storage device comprises a container body, and the container body comprises:

[0006] Three-phase mains power access terminal;

[0007] Energy storage devices;

[0008] Main control device;

[0009] A voltage detection device, wherein the input end of the voltage detection device is electrically connected to the three-phase mains power access end, the output end of the voltage detection device is electrically connected to the main control device, and the voltage detection device is used to output a mains power detection signal;

[0010] A static switching device, wherein the input end of the static switching device is electrically connected to the three-phase mains access end and the energy storage device, and the output end of the static switching device is electrically connected to the load access end;

[0011] The main control device is used to control the static switching device to switch on or off the path between the three-phase mains access terminal and / or the energy storage device and the load access terminal according to the mains detection signal.

[0012] In one embodiment, the energy storage device comprises:

[0013] A battery pack, the battery pack comprising a plurality of battery clusters, each of the battery clusters being provided with a corresponding air duct and a temperature regulating device;

[0014] A voltage conversion circuit, a first end of which is electrically connected to the battery pack, and the voltage conversion circuit is used to convert an input first voltage into a second voltage and output the second voltage;

[0015] A transformer circuit, wherein the first end of the transformer circuit is electrically connected to the second end of the voltage conversion circuit, the second end of the transformer circuit is electrically connected to the static switching device, and the transformer circuit is used to convert the input second voltage or third voltage into the third voltage or the second voltage and output it.

[0016] In one embodiment, the energy storage device also includes an energy storage switch circuit, a first end of the energy storage switch circuit is electrically connected to the battery pack, a second end of the switch circuit is electrically connected to the voltage conversion circuit, a controlled end of the energy storage switch circuit is electrically connected to the main control device, and the energy storage switch circuit is used to open or disconnect the path between the battery pack and the voltage conversion circuit according to an energy storage switch signal output by the main control device.

[0017] In one embodiment, the static switching device includes a bypass switch circuit, a first end of the bypass switch circuit is electrically connected to the three-phase mains access terminal, and a second end of the bypass switch circuit is electrically connected to the load access terminal;

[0018] Wherein, the controlled end of the bypass switch circuit is electrically connected to a touch component, and the bypass switch circuit is used to open or close the path between the three-phase mains access end and the load access end when the touch component is triggered.

[0019] In one embodiment, the container-type energy storage device also includes a backup power supply generating device, the output end of the backup power supply generating device is electrically connected to the input end of the static switching device, the controlled end of the backup power supply generating device is electrically connected to the main control device, and the backup power supply generating device is used to change the working state according to the backup power supply control signal output by the main control device.

[0020] In one embodiment, the container-type energy storage device further includes a dual power switching device, a first input end of the dual power switching device is electrically connected to the three-phase mains access end, a second input end of the dual power switching device is electrically connected to the backup power generation device, an output end of the dual power switching device is electrically connected to an input end of the static switching device, and a controlled end of the dual power switching device is electrically connected to the main control device;

[0021] The main control device is also used to control the dual power switching device to disconnect the path between the three-phase mains access terminal and the static switching device according to the mains detection signal, and to connect the path between the output terminal of the backup power generation device and the static switching device, and to control the operation of the backup power generation device;

[0022] Alternatively, the main control device is also used to control the dual power switching device to open the path between the three-phase mains access terminal and the static switching device according to the mains detection signal, and to disconnect the path between the output terminal of the backup power generating device and the static switching device, and to control the backup power generating device to stop working.

[0023] In one embodiment, the container-type energy storage device also includes a common power generation device, the output end of the common power generation device is electrically connected to the load access end and the static switching device, and the controlled end of the common power generation device is electrically connected to the main control device.

[0024] In one embodiment, the container-type energy storage device further includes an environment detection device, an output end of the environment detection device is electrically connected to the main control device, and the environment detection device is used to output an environment detection signal.

[0025] In one embodiment, the container-type energy storage device further includes an uninterruptible power supply, and an output end of the uninterruptible power supply is electrically connected to the main control device.

[0026] The present invention further provides a containerized energy storage system, the containerized energy storage system comprising a containerized energy storage device as described in any one of the above items and a cloud;

[0027] Among them, the container-type energy storage device also includes a communication device, which is electrically connected to the main control device and is also communicatively connected to the cloud platform. The communication device is used for data interaction between the main control device and the cloud platform.

[0028] The technical solution of the present invention detects the mains voltage connected to the three-phase mains access terminal by using a voltage detection device, and outputs a mains detection signal to the main control device. The main control device confirms the state of the mains connected to the mains access terminal through the received detection signal. When it is confirmed that the connected mains is in a power-off state, the main control device will control the static switching device to disconnect the path between the three-phase mains access terminal and the load, and control the static switching device to conduct the path between the energy storage device and the load. When it is confirmed that the connected mains has restored the normal power supply state, the main control device will control the static switching device to conduct the path between the three-phase mains access terminal and the load, so that the mains can supply power to the load again. Among them, the static switching device can realize the switching of power supply in a short time, so that the energy storage device can stably supply power to the load. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] 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 some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0030] Figure 1 It is a structural schematic diagram of the container-type energy storage device of the present invention;

[0031] Figure 2 It is a structural schematic diagram of another embodiment of the container-type energy storage device of the present invention;

[0032] Figure 3 A circuit diagram of another embodiment of the container-type energy storage device of the present invention;

[0033] Figure 4 This is a circuit diagram of another embodiment of the container-type energy storage device of the present invention;

[0034] Figure 5 This is a schematic structural diagram of another embodiment of the container-type energy storage device of the present invention.

[0035] Description of Figure Numbers:

[0036] 10. Main control device; 20. Energy storage device; 21. Battery pack; 22. Voltage conversion circuit; 23. Voltage transformation circuit; 30. Voltage detection device; 40. Static switching device; 50. Backup power supply generating device; 60. Dual power supply switching device; 70. Normal power supply generating device.

[0037] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0038] 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.

[0039] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0040] In addition, the descriptions of "first", "second", etc. in the present invention are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0041] With the rapid development of renewable energy, an independent power storage system that integrates power generation, energy storage and power management functions has been widely used in remote areas, emergency rescue and microgrids. However, the existing energy storage system has the problem of slow power switching speed, that is, when there is a fault in the power grid, the existing energy storage system takes a long time to switch from grid-connected mode to off-grid mode, which will cause power supply interruption to critical loads. Some loads are extremely sensitive to the stability of the power supply, and any short power outage may cause data loss, equipment failure or even serious safety accidents.

[0042] In addition, the existing energy storage system has the problem of slow backup power switching speed in off-grid mode, which will cause the units in the energy storage system that require power supply to fail, and the energy storage system will not be able to work stably when there is a fault in the power grid.

[0043] Therefore, reference Figures 1 to 4 The present invention provides a container-type energy storage device, the container-type energy storage device comprises a container body, and the container body comprises:

[0044] Three-phase mains power access terminal;

[0045] Energy storage device 20;

[0046] Main control device 10;

[0047] A voltage detection device 30, wherein the input end of the voltage detection device 30 is electrically connected to the three-phase mains access end, the output end of the voltage detection device 30 is electrically connected to the main control device 10, and the voltage detection device 30 is used to output a mains detection signal;

[0048] A static switching device 40, wherein the input end of the static switching device 40 is electrically connected to the three-phase mains access end and the energy storage device 20, respectively, and the output end of the static switching device 40 is electrically connected to the load access end;

[0049] The main control device 10 is used to control the static switching device 40 to switch on or off the path between the three-phase mains access terminal and / or the energy storage device 20 and the load access terminal according to the mains detection signal.

[0050] In this embodiment, the internal layout of the container body adopts a modular design. By setting the position and size of each functional area and selecting the corresponding device, the internal space is fully utilized. In addition, by adopting a standardized device interface, the installation and replacement of each device is facilitated. Among them, an inspection channel is also reserved in the middle of the container-type energy storage device to facilitate the installation, commissioning and maintenance of the device.

[0051] In this embodiment, the energy storage device 20 can be implemented by lithium-ion batteries, lead-acid batteries, sodium-sulfur batteries, etc. Among them, the energy storage device 20 includes: a battery pack 21, the battery pack 21 includes a plurality of battery clusters, each of which is provided with a corresponding air duct and temperature regulating device; a voltage conversion circuit 22, the first end of the voltage conversion circuit 22 is electrically connected to the battery pack 21, and the voltage conversion circuit 22 is used to convert the input first voltage into a second voltage and output it; a voltage conversion circuit 23, the first end of the voltage conversion circuit 23 is electrically connected to the second end of the voltage conversion circuit 22, the second end of the voltage conversion circuit 23 is electrically connected to the static switching device 40, and the voltage conversion circuit 23 is used to convert the input second voltage or third voltage into a third voltage or second voltage and output it. Further, the battery cluster is implemented by lithium iron phosphate batteries, which are relatively stable under extreme conditions such as overcharging, short circuit, and impact, are not prone to thermal runaway, have high safety, and have a long cycle life. Taking the 0.5MW / 1MWh energy storage battery pack 21 using a 20-foot standard container as an example, 13 57.6V / 280Ah battery cells are connected in series to form a battery cluster of 209.664kWh, and the battery pack 21 with a convergence capacity of 1048.32kWh for 5 battery clusters. Among them, each battery cluster is also provided with a corresponding air duct and temperature regulating device. The setting of the air duct can be set according to the size and shape of the battery cluster, and a heat sink can also be set in the air duct to improve the heat dissipation efficiency of the battery cluster. The temperature regulating device can be implemented by an air conditioner, a fan and a heating component, and is electrically connected to the main control device 10 to achieve temperature regulation. Further, a temperature detection device is also provided in the energy storage device, and the output end of the temperature detection device is electrically connected to the battery management system in the energy storage device to output a temperature detection signal to the battery management system. The battery management system will confirm the current temperature of the energy storage device according to the temperature detection signal, and then choose whether to adjust the temperature regulating device to work, so that the energy storage device 20 works at a suitable and stable temperature. It is understandable that the voltage conversion circuit 22 includes an inverter circuit and a rectifier circuit. When the mains power input to the three-phase mains power access terminal of the container-type energy storage device is abnormal, the main control device 10 will control the energy storage device 20 to supply power to the load. Among them, the battery pack 21 in the energy storage device 20 outputs direct current, and the inverter circuit in the voltage conversion circuit 22 is required to convert the input DC voltage into a corresponding AC voltage and output it. At this time, the first voltage is a DC voltage, and the second voltage is an AC voltage. When the mains power input to the three-phase mains power access terminal of the container-type energy storage device is normal, the mains power can charge the energy storage device 20. Among them, the input to the energy storage device 20 is alternating current, and the rectifier circuit in the voltage conversion circuit 22 is required to convert the input AC power into DC power and input it. At this time, the first voltage is an AC power supply, and the second voltage is a DC voltage.The voltage conversion circuit 22 cannot directly invert the DC power output by the battery pack 21 to a level equivalent to the mains power, nor can it directly rectify the AC power input by the mains power to a charging voltage that can be received by the battery pack 21. Therefore, the energy storage device 20 is also required to be provided with a voltage conversion circuit 23, such as a transformer, to correspondingly increase or decrease the voltage of the AC power for output or input.

[0052] In this embodiment, the main control device 10 can be implemented by a main controller, such as DSP (Digital Signal Process), MCU (Microcontroller Unit), FPGA (Field Programmable Gate Array), SOC (System On Chip), etc. As the data processing center and control center of the containerized energy storage device, the main control device 10 will receive a large amount of work data and execute corresponding control instructions to ensure the stable operation of the containerized energy storage device. Optionally, the main control device 10 can also be implemented by an energy management system.

[0053] In this embodiment, the voltage detection device 30 can be provided separately or in the static switching device 40. The voltage detection device 30 can be implemented by a high voltage voltage division detection circuit, a rectification detection circuit, a Hall effect detection circuit, etc. By continuously detecting the mains power inputted from the three-phase mains power access terminal and continuously outputting a voltage detection signal to the main control device 10, the main control device 10 can confirm the mains power state inputted from the three-phase mains power access terminal.

[0054] In this embodiment, the static switching device 40 can complete the switching from one power supply to another power supply in a short time to avoid affecting sensitive loads. Among them, the static switching device 40 monitors the quality of the three-phase mains access terminal. Once an abnormality is detected, the static switching device 40 will immediately switch to the energy storage device 20 to power the load, ensuring that the load continues to obtain a stable power supply. Optionally, a corresponding main control circuit and a voltage detection circuit can be set in the static switching device 40, so as to quickly realize voltage detection and switch control by itself. Among them, the static switching device 40 is provided with at least three groups of switch circuits, namely, a first switch circuit, a second switch circuit and a third switch circuit. The first end of the first switch circuit is electrically connected to the three-phase mains access terminal, and the second end of the first switch circuit is electrically connected to the second end of the second switch circuit and the first end of the third switch circuit; the first end of the second switch circuit is electrically connected to the connection end of the energy storage device 20; the second end of the third switch circuit is electrically connected to the load. The controlled ends of the first switch circuit, the second switch circuit and the third switch circuit are all electrically connected to the main control circuit to realize the on-off of the path between the three-phase mains access terminal and / or the energy storage device 20 and the load access terminal. Furthermore, the main control circuit can also communicate with the control device to achieve data interaction.

[0055] In the present embodiment, the voltage detection device 30 is used to detect the mains voltage connected to the three-phase mains access terminal, and the mains detection signal is output to the main control device 10. The main control device 10 confirms the mains state connected to the mains access terminal through the received detection signal. When it is confirmed that the connected mains is in a power-off state, the main control device 10 will control the static switching device 40 to disconnect the path between the three-phase mains access terminal and the load, and control the static switching device 40 to conduct the path between the energy storage device 20 and the load. When it is confirmed that the connected mains has restored the normal power supply state, the main control device 10 will control the static switching device 40 to conduct the path between the three-phase mains access terminal and the load, so that the mains can supply power to the load again. Among them, the static switching device 40 can realize the switching of power supply in a short time, so that the energy storage device 20 can stably supply power to the load.

[0056] refer to Figure 3 In one embodiment of the present invention, the energy storage device 20 further includes an energy storage switch circuit, a first end of the energy storage switch circuit is electrically connected to the battery pack 21, a second end of the switch circuit is electrically connected to the voltage conversion circuit 22, a controlled end of the energy storage switch circuit is electrically connected to the main control device 10, and the energy storage switch circuit is used to turn on or off the path between the battery pack 21 and the voltage conversion circuit 22 according to the energy storage switch signal output by the main control device 10.

[0057] In this embodiment, the energy storage switch circuit is arranged between the battery pack 21 and the voltage conversion circuit 22. By electrically connecting the controlled end of the energy storage switch circuit to the main control device 10, direct control of the output or input of the battery pack 21 is achieved, thereby effectively improving the safety of the operation of the battery pack 21.

[0058] refer to Figure 2 and Figure 3 In one embodiment of the present invention, the static switching device 40 includes a bypass switch circuit, a first end of the bypass switch circuit is electrically connected to the three-phase mains access terminal, and a second end of the bypass switch circuit is electrically connected to the load access terminal;

[0059] Wherein, the controlled end of the bypass switch circuit is electrically connected to a touch component, and the bypass switch circuit is used to open or close the path between the three-phase mains access end and the load access end when the touch component is triggered.

[0060] In this embodiment, it can be known from the above content that the static switching device 40 includes at least a first switch circuit, a second switch circuit and a third switch circuit. Among them, the first end of the bypass switch circuit is electrically connected to the first end of the first switch circuit, and the second end of the bypass switch circuit is electrically connected to the second end of the third switch circuit. The controlled end of the bypass switch circuit can be electrically connected to a touch component, so that the bypass switch circuit is closed by artificial triggering; the controlled end can also be electrically connected to the main control device 10, so that when the main control device 10 confirms that there is a fault in the static switching device 40, it automatically closes the bypass switch circuit, so that the mains power input from the three-phase mains power access end can continue to supply power to the load through the bypass switch circuit, effectively improving the stability of the container-type energy storage device.

[0061] refer to Figure 2 In one embodiment of the present invention, the container-type energy storage device further includes a backup power supply generating device 50, the output end of the backup power supply generating device 50 is electrically connected to the input end of the static switching device 40, the controlled end of the backup power supply generating device 50 is electrically connected to the main control device 10, and the backup power supply generating device 50 is used to change the working state according to the backup power supply control signal output by the main control device 10.

[0062] In this embodiment, when the mains power supply is in an abnormal state and the amount of electricity stored in the energy storage device 20 is insufficient, in order to continue to supply power to the load, a corresponding backup power supply generating device 50 needs to be provided. The backup power supply generating device 50 can be implemented by a power generation device with a large and stable power generation capacity, such as a diesel generator, and its control end is electrically connected to the main control device 10, so that when the mains power supply is in an abnormal state and the amount of electricity stored in the energy storage device 20 is insufficient, the technical effect of quickly switching the power supply is achieved. Furthermore, the voltage detection device 30 will also continue to detect whether the mains power input to the three-phase mains power access terminal has returned to normal. After the mains power input to the three-phase mains power access terminal has returned to normal, the control device will control the backup power supply generating device 50 to stop working. By providing the backup power supply generating device 50, the stability of the container-type energy storage device supplying power to the load is effectively improved.

[0063] refer to Figure 2 In one embodiment of the present invention, the container-type energy storage device further comprises a dual power switching device 60, a first input end of the dual power switching device 60 is electrically connected to the three-phase mains access end, a second input end of the dual power switching device 60 is electrically connected to the backup power generation device 50, an output end of the dual power switching device 60 is electrically connected to an input end of the static switching device 40, and a controlled end of the dual power switching device 60 is electrically connected to the main control device 10;

[0064] The main control device 10 is also used to control the dual power switching device 60 to disconnect the path between the three-phase mains access terminal and the static switching device 40 according to the mains detection signal, and to connect the path between the output terminal of the backup power generation device 50 and the static switching device 40, and to control the backup power generation device 50 to work;

[0065] Alternatively, the main control device 10 is also used to control the dual power switching device 60 to open the path between the three-phase mains access terminal and the static switching device 40 according to the mains detection signal, and to disconnect the path between the output terminal of the backup power generating device 50 and the static switching device 40, and to control the backup power generating device 50 to stop working.

[0066] In this embodiment, the backup power supply generating device 50 and the three-phase mains power access terminal are connected to the static switching device 40 using the same path. Therefore, it is necessary to set a switching switch to realize the switching of the input voltage between the backup power supply generating device 50 and the three-phase mains power access terminal. Among them, the switching switch is realized by a dual power switching device 60. The dual power switching device 60 is electrically connected to the main control device 10, thereby receiving the control instructions output by the main control device 10 and performing the corresponding switching action. During the switching process of the dual power switching device 60, the three-phase mains power access terminal will be disconnected first, and then the backup power supply generating device 50 will be connected, and there will be a relatively short power-off time in between. Among them, the main control device 10 will confirm the state of the mains power input to the three-phase mains power access terminal according to the mains power detection signal, thereby confirming whether to control the dual power switching device 60 to disconnect the path between the three-phase mains power access terminal and the static switching device 40. After confirming that the mains power input to the three-phase mains power access terminal is in an abnormal state, the main control device 10 will also confirm the current energy storage state of the energy storage device 20 through data interaction with the battery management system in the energy storage device 20, thereby confirming whether it is necessary to control the backup power generation device 50 to work. It can be understood that when the mains power input to the three-phase mains power access terminal is in an abnormal state, the dual power switching device 60 will disconnect the path between the output three-phase mains power access terminal and the static switching device 40, and conduct the path between the output end of the backup power generation device 50 and the static switching device 40. However, whether the backup power generation device 50 works also depends on the energy storage state of the energy storage device 20.

[0067] refer to Figure 2 In one embodiment of the present invention, the container-type energy storage device also includes a common power supply generating device 70, the output end of the common power supply generating device 70 is electrically connected to the load access end and the static switching device 40, and the controlled end of the common power supply generating device 70 is electrically connected to the main control device 10.

[0068] In this embodiment, the common power generation device 70 can be implemented by using a photovoltaic power generation device, a wind power generation device, a hydropower generation device, etc. according to the actual environment of the container-type energy storage device, or a variety of different types of power generation devices can be used in combination to achieve effective use of renewable power sources. It can be understood that the common power generation device 70 can output electricity according to the actual environmental conditions to power the load and charge the energy storage device 20. Among them, the common power generation device 70 is taken as an example of a photovoltaic power generation device. A photovoltaic power generation device is a device that directly converts sunlight into electrical energy using a solar cell panel. In the main circuit of the container-type energy storage device, the alternating current corresponding to the three-phase mains standard is used, while the electrical energy output by the photovoltaic power generation device is direct current. Therefore, a corresponding inverter circuit needs to be set in the photovoltaic power generation device so that it outputs the corresponding alternating current. In order to improve the energy conversion efficiency of photovoltaics, an inverter circuit with higher energy conversion efficiency needs to be selected. Optionally, when the electrical energy generated by the common power generation device 70 is greater than the electrical energy required by the load, the electrical energy generated by the common power generation device 70 will charge the energy storage device 20.

[0069] Optionally, the containerized energy storage device can also be designed with multiple working modes such as conventional mode, peak shaving and valley filling, and manual control. Among them, the conventional mode is the emergency backup power mode, and the emergency backup power mode includes the mains mode, the backup power mode and the off-grid mode. Both the mains mode and the backup power mode require the energy storage device to maintain a certain amount of residual power to facilitate the subsequent power supply of the energy storage device. Therefore, both the mains mode and the backup power mode need to set the corresponding shutdown power to avoid excessive discharge of the energy storage device in this mode, resulting in too low residual power. The off-grid mode mainly charges the battery pack in the energy storage device and supplies power to the load. 12 time periods can be set in the peak shaving and valley filling mode. Each time period can be set to charge, discharge, and standby, or the power value can be set according to the actual situation. It is also possible to discharge at peak electricity prices and charge at low electricity prices to achieve peak-valley arbitrage. In the manual control mode, only simple power on and off actions can be performed on the device. Different working modes can be output on the display component corresponding to the main control device 10, and can also be operated through the cloud platform.

[0070] In an embodiment of the present invention, the container-type energy storage device further includes an environment detection device, the output end of the environment detection device is electrically connected to the main control device 10, and the environment detection device is used to output an environment detection signal.

[0071] In this embodiment, the environmental detection device can be implemented by a water immersion sensor, a temperature and humidity sensor, etc. The environmental detection device outputs an environmental detection signal to the main control device 10 by electrically connecting the output end to the main control device 10. The main control device 10 will confirm the working state of the container-type energy storage device through the environmental detection signal and execute the corresponding control instruction. For example, when the electrode of the water immersion sensor in the energy storage device 20 detects the presence of liquid, it will be uploaded to the battery management system through a dry contact signal, and then uploaded to the main control device 10 via the battery management system. The main control device 10 will issue a control instruction to the battery management system to stop the battery pack 21 from outputting voltage and control the voltage conversion circuit 22 to stop working. When the main control device 10 receives the water immersion detection signal corresponding to the disappearance of liquid, and after a delay for a period of time, it will output a control instruction to the battery management system to make the battery pack 21 output voltage again and control the voltage conversion circuit 22 to work again.

[0072] refer to Figure 4 In one embodiment of the present invention, the container-type energy storage device further includes an uninterruptible power supply, and an output end of the uninterruptible power supply is electrically connected to the main control device 10.

[0073] In this embodiment, when the mains power input at the three-phase mains power access terminal is normal, the uninterruptible power supply converts the mains power into direct current and supplies power to the main control device 10 and other devices. At the same time, the uninterruptible power supply will also use a portion of the electric energy to charge the built-in battery to ensure that the battery is fully charged. When the mains power fails, the uninterruptible power supply will immediately detect this change and switch to the battery power supply mode in a short time to supply power to the main control device 10 and other devices to ensure that the main control device 10 and other devices can operate normally. Among them, the main control device 10 can charge the built-in battery of the uninterruptible power supply by controlling the energy storage device 20 to further increase the working time of the main control device 10.

[0074] The present invention further provides a containerized energy storage system, the containerized energy storage system comprising a containerized energy storage device as described in any one of the above items and a cloud;

[0075] The containerized energy storage device further comprises a communication device, which is electrically connected to the main control device 10, and is also connected to the cloud platform for communication, and is used for data interaction between the main control device 10 and the cloud platform. It is worth noting that since the containerized energy storage system of the present invention is based on the above-mentioned containerized energy storage device, the embodiments of the containerized energy storage system of the present invention include all technical solutions of all embodiments of the above-mentioned containerized energy storage device, and the technical effects achieved are also exactly the same, which will not be repeated here.

[0076] The present invention further proposes a battery module, the battery module comprising the battery management circuit as described above or the battery control board as described above. It is worth noting that since the battery module of the present invention is based on the battery management circuit or battery control board as described above, the embodiments of the battery module of the present invention include all technical solutions of all embodiments of the battery management circuit or battery control board as described above, and the technical effects achieved are also exactly the same, which will not be repeated here.

[0077] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A containerized energy storage device, characterized in that: The container-type energy storage device comprises a container body, and the container body comprises: Three-phase mains power access terminal; Energy storage devices; Main control device; A voltage detection device, wherein the input end of the voltage detection device is electrically connected to the three-phase mains power access end, the output end of the voltage detection device is electrically connected to the main control device, and the voltage detection device is used to output a mains power detection signal; A static switching device, wherein the input end of the static switching device is electrically connected to the three-phase mains access end and the energy storage device, and the output end of the static switching device is electrically connected to the load access end; The main control device is used to control the static switching device to switch on or off the path between the three-phase mains access terminal and / or the energy storage device and the load access terminal according to the mains detection signal.

2. The container-type energy storage device according to claim 1, characterized in that: The energy storage device comprises: A battery pack, the battery pack comprising a plurality of battery clusters, each of the battery clusters being provided with a corresponding air duct and a temperature regulating device; A voltage conversion circuit, a first end of which is electrically connected to the battery pack, and the voltage conversion circuit is used to convert an input first voltage into a second voltage and output the second voltage; A transformer circuit, wherein the first end of the transformer circuit is electrically connected to the second end of the voltage conversion circuit, the second end of the transformer circuit is electrically connected to the static switching device, and the transformer circuit is used to convert the input second voltage or third voltage into the third voltage or the second voltage and output it.

3. The container-type energy storage device according to claim 2, characterized in that: The energy storage device also includes an energy storage switch circuit, a first end of the energy storage switch circuit is electrically connected to the battery pack, a second end of the switch circuit is electrically connected to the voltage conversion circuit, and a controlled end of the energy storage switch circuit is electrically connected to the main control device. The energy storage switch circuit is used to turn on or off the path between the battery pack and the voltage conversion circuit according to an energy storage switch signal output by the main control device.

4. The container-type energy storage device according to claim 1, characterized in that: The static switching device comprises a bypass switch circuit, a first end of the bypass switch circuit is electrically connected to the three-phase mains access terminal, and a second end of the bypass switch circuit is electrically connected to the load access terminal; Wherein, the controlled end of the bypass switch circuit is electrically connected to a touch component, and the bypass switch circuit is used to open or close the path between the three-phase mains access end and the load access end when the touch component is triggered.

5. The container-type energy storage device according to claim 1, characterized in that: The container-type energy storage device also includes a backup power supply generating device, the output end of the backup power supply generating device is electrically connected to the input end of the static switching device, the controlled end of the backup power supply generating device is electrically connected to the main control device, and the backup power supply generating device is used to change the working state according to the backup power supply control signal output by the main control device.

6. The container-type energy storage device according to claim 5, characterized in that: The container-type energy storage device also includes a dual power switching device, a first input end of the dual power switching device is electrically connected to the three-phase mains access end, a second input end of the dual power switching device is electrically connected to the backup power generation device, an output end of the dual power switching device is electrically connected to the input end of the static switching device, and a controlled end of the dual power switching device is electrically connected to the main control device; The main control device is also used to control the dual power switching device to disconnect the path between the three-phase mains access terminal and the static switching device according to the mains detection signal, and to connect the path between the output terminal of the backup power generation device and the static switching device, and to control the operation of the backup power generation device; Alternatively, the main control device is also used to control the dual power switching device to open the path between the three-phase mains access terminal and the static switching device according to the mains detection signal, and to disconnect the path between the output terminal of the backup power generating device and the static switching device, and to control the backup power generating device to stop working.

7. The container-type energy storage device according to claim 1, characterized in that: The container-type energy storage device also includes a common power generation device, the output end of the common power generation device is electrically connected to the load access end and the static switching device, and the controlled end of the common power generation device is electrically connected to the main control device.

8. The container-type energy storage device according to claim 1, characterized in that: The container-type energy storage device further includes an environment detection device, an output end of which is electrically connected to the main control device, and the environment detection device is used to output an environment detection signal.

9. The container-type energy storage device according to claim 1, characterized in that: The container-type energy storage device also includes an uninterruptible power supply, and an output end of the uninterruptible power supply is electrically connected to the main control device.

10. A containerized energy storage system, characterized in that: The containerized energy storage system comprises a containerized energy storage device as claimed in any one of claims 1 to 9 and a cloud; Among them, the container-type energy storage device also includes a communication device, which is electrically connected to the main control device and is also communicatively connected to the cloud platform. The communication device is used for data interaction between the main control device and the cloud platform.

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