CN205029416U - Little capacity distribution formula energy memory and energy storage cabinet - Google Patents

Abstract

The utility model provides a little capacity distribution formula energy memory, includes: storage battery for the storage electric quantity that provides of external power source and be used for providing the power to the alternating load, charge controllers is with storage battery signal connection for switching storage battery charges, exoelectric operating condition, the selection control ware that charges is including first passageway and second channel, the selection control ware that charges is used for the switching state to charge to storage battery through charge controllers through first passageway or second channel with the selection. The utility model discloses at first select new forms of energy power generating equipment to charge to storage battery, when the not enough or commercial power of generation of electricity by new energy is in the power consumption low ebb, charge to storage battery through the commercial power, when storage battery 1's brownout, the commercial power bypass of going back the accessible dc -to -ac converter is to load direct power feeding, convenient to use, reliable, with low costs. One kind little capacity distribution formula energy storage cabinet is still disclosed.

Description

Small-capacity distributed energy storage device and energy storage cabinet

technical field

The invention relates to the field of new energy applications, in particular to a small-capacity distributed energy storage device and an energy storage cabinet.

Background technique

Energy storage technology is more and more widely used in new energy, smart grid, energy-saving technology, electric vehicles and other fields. Energy storage technology is used in large-scale renewable energy grid connection and distributed power generation. Peak energy storage plays an important role in solving the power consumption of independent buildings and households far away from the grid. It is currently recognized as the most effective technical means, and battery energy storage technology is currently the most widely used storage technology. technology.

Energy storage devices usually use energy storage carriers to temporarily store electrical energy and release it when needed. At present, there are many energy storage devices, which are mostly used for grid connection of new energy sources such as photovoltaics, for adjusting power quality, and for energy storage of electric vehicles. In the existing technology, battery energy storage is a commonly used energy storage method. In actual use, there are often unbalanced charging and discharging, current, voltage, capacity and other parameters monitoring between battery cells, battery packs and battery cabinets, and charging and discharging deviations. The problem is that the energy storage device does not combine energy storage and monitoring functions, and does not apply the energy storage device in the form of optional charging power to independent loads, or independent buildings, households and other power units far away from the grid. .

Contents of the invention

The technical problem to be solved by the present invention is to combine the energy storage with the power supply selection function for the battery energy storage method, select the charging power supply as the mains power or the new energy power generation form, and make full use of the new energy power generation and energy storage, so that when the new energy power supply is insufficient , or when the mains power is at a low power consumption, choose a suitable power source to charge.

According to the first aspect, the present application provides a small-capacity distributed energy storage device, including:

The battery pack is used to store the electric power provided by the external power supply and to provide power to the AC load; the charging and discharging controller is connected to the battery pack signal and used to switch the charging and discharging working state of the battery pack; the charging selection controller is connected to the charging Discharge controller signal connection, including the first channel and the second channel; the first channel is used to connect to the mains, the second channel is used to connect to new energy power generation equipment; the charging selection controller is used to switch the state to select the first channel The working or second channel charges the battery through the charge and discharge controller. .

Further, it also includes: a battery inspection instrument, which is connected to the signal of the battery pack, and is used for real-time monitoring of the state of the working parameters of the battery pack to prevent overcharging and over-discharging.

Preferably, the working parameters include: battery cell voltage, total voltage, battery current, battery internal resistance, charge and discharge current, etc., including the monitoring of parameters such as voltage, current, ampere hours, and voltage hours of the battery pack. Preferably, the battery inspection instrument triggers an alarm when it detects that the operating parameter exceeds a preset value.

Further, it also includes: an inverter connected between the charging and discharging controller and the AC load.

According to the second aspect, the present application provides a small-capacity distributed energy storage cabinet, including:

A cabinet body; further including the above-mentioned small-capacity distributed energy storage device, the small-capacity distributed energy storage device is arranged in the cabinet body.

Further, the cabinet body is divided into an upper layer and a lower layer, and the battery pack is placed in the lower layer of the cabinet body.

Further, wheels are also installed on the base of the cabinet.

The technical solution of the present invention has the following advantages:

The small-capacity distributed energy storage device and energy storage cabinet provided by the present invention, because the charging selection controller provides a first channel and a second channel, the first channel is used to connect to the mains, and the second channel is used to connect to new energy sources For power generation equipment, the charging selection controller can switch and select the first channel and the second channel to charge the battery pack through the charge and discharge controller, so that it can choose new energy to charge the battery pack, or when the new energy is insufficiently charged, or the mains power is in the When the power consumption is low, you can choose the mains charging.

As a preferred technical solution, due to the addition of a battery inspection instrument, real-time monitoring of the working state of the battery pack can be realized, and the combination of energy storage and monitoring functions improves the reliability and safety of the device.

The energy storage device of the present invention is suitable for distributed independent loads, or independent buildings, households and other power consumers away from the power grid.

Description of drawings

In order to more clearly illustrate the specific implementation of the present invention or the technical solutions in the prior art, the following will briefly introduce the accompanying drawings that need to be used in the specific implementation or description of the prior art. Obviously, the accompanying drawings in the following description The drawings show some implementations of the present invention, and those skilled in the art can obtain other drawings based on these drawings without creative work.

Fig. 1 is a schematic structural diagram of a small-capacity distributed energy storage device disclosed in an embodiment of the present invention;

Fig. 2 is a schematic structural diagram of a small-capacity distributed energy storage cabinet disclosed in an embodiment of the present invention.

detailed description

The technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the described embodiments are some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

The technical features involved in different embodiments of the present invention described below may be combined with each other as long as they do not constitute a conflict with each other.

Please refer to FIG. 1, which is a schematic structural diagram of a small-capacity distributed energy storage device disclosed in this embodiment. The small-capacity distributed energy storage device includes: a battery pack 1, a charging and discharging controller 2 and a charging selection controller 3, wherein ,

The battery pack 1 is used to store electric power provided by an external power supply and to provide power to an AC load. In this embodiment, the external power supply may be commercial power or new energy power generation equipment. In a specific embodiment, the battery pack 1 can be composed of lithium batteries, and other battery packs can be selected according to the actual situation, and the number of batteries can be determined according to the selected technical parameters such as the voltage of the single battery, such as 6*12V.

The charging and discharging controller 2 is connected with the battery pack 1 for switching the charging and discharging working states of the battery pack 1 . When the power in battery pack 1 is not enough, under the control of charge and discharge controller 2, the external power supply charges the battery pack 1; when it is necessary to supply power to the external AC load, under the control of charge and discharge controller 2, through the inverter The battery pack 1 supplies power to an external AC load. In this embodiment, the charging and discharging controller 2 can be an industrial-grade device, which not only has the function of charging and discharging, but also has the function of selecting a charging power source. Protective function. In a preferred embodiment, the charging and discharging controller 2 can also be equipped with a liquid crystal display and an operation panel for easy operation, and of course, can also have RS232 serial port and Modbus bus communication interface.

The charge selection controller 3 is connected to the charge and discharge controller for signals, and includes a first channel and a second channel. Among them, the first channel is used to connect to the mains, the second channel is used to connect to the new energy power generation equipment 4; the charging selection controller 3 is used to switch the state to select the first channel or the second channel to work, and through charging and discharging The controller charges the battery pack 1 . When in use, the switch can be used to select the mains charging mode or the charging mode of new energy power generation equipment.

In this embodiment, the connection between the second channel and the new energy is reserved, and the new energy generating equipment 4 can be photovoltaic or wind power, which does not belong to the content of this device. In a specific embodiment, the charging selection controller 3 may be an industrial-grade device for selecting whether the charging power source is commercial power or a new energy generating device 4 . The input voltage of the charging selection controller 3 is AC220V, the current is 1A, and the maximum output current is 20A. It is preferably compatible with DC and AC input, and has a constant current output device. In a preferred embodiment, a charging and discharging controller with a charging selection function can be selected (that is, the charging and discharging controller 2 and the charging selection controller 3 are combined into one device, which has the functions of both), and there is also a charging and discharging controller that can protect the battery pack. Such as short circuit, overload and anti-reverse protection, with boost, direct charge, float charge, charge return voltage compensation performance.

In a preferred embodiment, the small-capacity distributed energy storage device further includes: a battery inspection instrument 5, which is connected to the battery pack 1 for signal monitoring, and is used to monitor the state of the working parameters of the battery pack 1 in real time. Among them, the working parameters of the battery pack 1 include: battery cell voltage, total voltage, battery current, battery internal resistance, charge and discharge current, etc., and parameters such as battery pack voltage, current, ampere hours, and voltage hours are monitored. When the battery inspection instrument 5 monitors in real time that the working parameter exceeds the preset value, an alarm can be triggered. In a specific embodiment, the battery inspection instrument 5 may be an industrial-grade device, which has an expandable inspection function. The battery inspection instrument 5 carries out real-time monitoring and fault alarm to the working state of the battery pack, so as to improve the reliability of the operation of the whole device. Specifically, the battery inspection instrument 5 can monitor the battery cell voltage, total voltage, battery current, battery internal resistance, charge and discharge current, etc. in real time as required, and monitor the voltage, current, ampere-hour, and voltage-hour And other parameter monitoring, of course, users can also set various alarm parameters by themselves. In a preferred embodiment, the battery inspection instrument 5 is equipped with a liquid crystal display and an operation panel for easy operation, and has an RS232 serial port. The battery inspection instrument 5 can monitor the status of each storage battery in real time to prevent overcharging and overdischarging.

In a preferred embodiment, the small-capacity distributed energy storage device further includes: an inverter 6 connected between the charging and discharging controller 2 and the AC load. The inverter 6 is used for inverting the power outputted by the battery pack 1 through the charge and discharge controller to provide the AC load. In a specific embodiment, the inverter 6 can be an industrial-grade device, for example, the parameter is 3-5KW, and the inverter output is 220VAC±5%/50Hz±1%. Preferably, the inverter 6 has a mains bypass function, has perfect protection functions such as output overload protection, short circuit protection, and over discharge protection, and an LCD man-machine interface. When the mains power is interrupted or the voltage exceeds the specified range, it accepts the power supply from the battery pack, and the inverter provides 220V/50HZ AC power supply, that is, the output of the inverter state, so as to ensure the normal operation of the load, that is, the working state is the mains bypass-EPS back type ;When the battery is under voltage, the inverter will switch to the mains bypass, and at this time it will automatically charge the battery, and the mains will directly supply power to the load, that is, the working state is inverter output-UPS backup.

In a preferred embodiment, the small-capacity distributed energy storage device may further include a low-voltage electrical part. For example: circuit breaker, and power selection switch, which are installed on the panel; power selection switch is used to select whether it is mains power or new energy power generation, and is the protection of the charging selection controller; other leakage protection switches, terminals, fuses, wire slots , power plug and other devices, specifically, these low-voltage electrical parts can be installed in the electric control cabinet, and will not be repeated here.

In specific implementation:

When the new energy power generation equipment 1 such as photovoltaic power generation is relatively sufficient, under the control of the charging selection controller 1 , the photovoltaic power generation system charges the storage battery through the second channel of the charging controller 1 . Of course, under the control of the charging selection controller 1 , the photovoltaic power generation system can also provide power to the AC load through the inverter 6 , or directly use it for the DC load.

When the charging and discharging controller 2 detects that the voltage of the battery pack 1 is too low, the inverter 6 can switch to the mains bypass, and the mains directly provides power support for the AC load; and when the charging and discharging controller 2 detects that the battery When the voltage rises to a preset voltage, the inverter 6 can be switched to an inverter state, and the battery pack 1 provides DC power to the inverter. In this embodiment, the preset voltage can be determined based on experience.

When the utility power is cheaper in low power consumption or when the photovoltaic power generation cannot support the load (such as cloudy days or at night), the utility power charges the storage battery 1 through the first channel of the charging controller 1 through the charging selection switch.

Please refer to FIG. 2, this embodiment also discloses a small-capacity distributed energy storage cabinet, including: a cabinet body 100, and the small-capacity distributed energy storage device disclosed in the above-mentioned embodiment, wherein please refer to FIG. 1 and FIG. 2 The small-capacity distributed energy storage device is set in the cabinet. In a specific embodiment, a power switch K0 and a power selection switch K1 can also be set on the small-capacity distributed energy storage cabinet to realize manual control by the user.

In a preferred embodiment, the cabinet 100 is at least divided into upper and lower layers, the storage battery pack 1 is placed in the lower layer of the cabinet 100, and other components of the small-capacity distributed energy storage device such as the charge and discharge controller 2, the charge selection control The device 3 , the battery inspection device 5 and the inverter 6 can be arranged on the upper layer of the cabinet body 100 . There is an isolation layer between the upper layer and the lower layer, which makes the device safer to use. In a preferred embodiment, heat dissipation holes of Φ3 mm with a pitch of 200*200 can be provided on the side walls around the lower part of the storage battery pack, so that the battery pack can dissipate heat.

In a specific embodiment, the size of the cabinet body 100 may be, for example, 800*500*1300 mm (width*depth*height), and the material for making the cabinet body 100 is preferably a steel plate, which is coated with antirust paint. In a preferred embodiment, an isolation layer may also be provided between the upper and lower layers.

In a preferred embodiment, wheels may also be installed on the base of the cabinet body 100 for easy movement and use.

The small-capacity distributed energy storage device and energy storage cabinet provided by the present invention, because the charging selection controller provides a first channel and a second channel, the first channel is used to connect to the mains, and the second channel is used to connect to new energy sources For power generation equipment, the charging selection controller can switch the first channel and the second channel to charge the battery pack, and first select the new energy power generation equipment to charge the battery pack; when the new energy generation is insufficient or the mains power is at a low point, the charging selection controller can Switch the first channel to charge the battery pack through the mains; when the voltage of the battery pack 1 is too low, it can also directly supply power to the load through the mains bypass of the inverter. Easy to use, reliable and low cost.

In a preferred embodiment, due to the addition of a battery inspection instrument, real-time monitoring of the working status of the battery pack can be realized.

This device has the function of conveniently selecting and controlling the charging and discharging power supply, and is suitable for distributed, small users, families, independent users far away from the grid, etc.

Apparently, the above-mentioned embodiments are only examples for clear description, rather than limiting the implementation. For those of ordinary skill in the art, other changes or changes in different forms can be made on the basis of the above description. It is not necessary and impossible to exhaustively list all the implementation manners here. And the obvious changes or changes derived therefrom are still within the scope of protection of the present invention.

Claims (8)

1. a low capacity distributed energy storage device, comprising:

Batteries, for storing electricity that external power source provides and for providing power supply to AC load;

Charging-discharging controller, is connected with described batteries signal, for switching the operating state of battery charging, electric discharge;

It is characterized in that, also comprise:

Charging selection control, is connected with charging-discharging controller signal; Charging selection control comprises first passage and second channel; Described first passage is used for being connected to civil power, and described second channel is used for being connected to generation of electricity by new energy equipment; ; Described charging selection control be used for switching state with select first passage work or second channel work with by charging-discharging controller to described charge in batteries.

2. low capacity distributed energy storage device as claimed in claim 1, is characterized in that, also comprise:

Battery data logging device, is connected with batteries signal, for monitoring the state of batteries running parameter.

3. low capacity distributed energy storage device as claimed in claim 2, it is characterized in that, described running parameter comprises: at least one item in battery cell voltage, total voltage, battery current, the internal resistance of cell and charging and discharging currents.

4. low capacity distributed energy storage device as claimed in claim 2, is characterized in that, described battery data logging device is monitoring trigger alarm when described running parameter exceedes preset value.

5. the low capacity distributed energy storage device as described in claim 1-4 any one, is characterized in that, also comprise: inverter, be connected between charging-discharging controller and AC load.

6. a low capacity distributed energy storage cabinet, comprising: cabinet; It is characterized in that, also comprise:

Low capacity distributed energy storage device as described in claim 1-5 any one, described low capacity distributed energy storage device is arranged in described cabinet.

7. low capacity distributed energy storage cabinet as claimed in claim 6, it is characterized in that, described cabinet is divided into upper and lower layer, and described batteries is placed in the lower floor of described cabinet.

8. low capacity distributed energy storage cabinet as claimed in claims 6 or 7, is characterized in that, the base of described cabinet is also provided with wheel.