KR102144802B1 - Temperature-controllable Solar Energy Storage Apparatus - Google Patents

Abstract

A solar energy storage device with easy temperature control includes a case having a space inside, a battery loading unit that is provided in the case and loads a plurality of batteries horizontally and vertically apart, a heater unit provided in the case, and is provided in the case and internal air. And a cooling unit for supplying temperature controlled air to the inside of the case and an airflow guide unit for moving the temperature controlled air discharged from the cooling unit to the battery loading unit.

Description

Temperature-controllable solar energy storage device {Temperature-controllable Solar Energy Storage Apparatus}

The present invention relates to a solar energy storage device, and more particularly, to a solar energy storage device capable of easily and uniformly controlling the internal temperature of the device.

A solar energy storage system (ESS) is a device that stores electricity produced by using sunlight, and includes a case, a charge/discharge control unit, an inverter, a battery loading unit, and a battery.

In the solar energy storage device, the battery has high charging/discharging efficiency at 15 to 30°C, preferably at 20 to 25°C. For this reason, the solar energy storage device is provided with a heater, a cooling unit, a temperature control unit, and the like, and maintains the internal temperature of the case, specifically, the temperature of the battery loading unit at 20 to 25°C. In order to keep the temperature of the battery loading part constant, conventionally, a method such as moving cold air to the bottom using a fan from the top of the case or inserting a refrigerant pipe into the wall of the case adjacent to the battery loading part has been used. Related prior art includes Patent Registration No. 1839128 (Stable capacitor management system and method in solar power generation).

However, in the case, a number of batteries are arranged and stacked horizontally and vertically. It is not easy to keep the temperature evenly overall. There is also a limit to keeping the temperature of the battery loading part evenly even when moving the cold air from the top of the case to the bottom quickly using a fan. Due to this, the life of some batteries is shortened, causing a problem of lowering the overall charging/discharging efficiency of the energy storage device.

The present invention is to solve the problems of the prior art, by maintaining the internal temperature of the case, precisely, the temperature of the battery loading part as a whole, to prevent the life of some batteries from being shortened first, and thereby, the energy storage device It is intended to provide a solar energy storage device that can maximize the overall charging and discharging efficiency.

The solar energy storage device of the present invention for achieving this purpose may include a case, a battery loading part, a heater part, a cooling part, an airflow guide part, and the like.

The case can form a space inside.

The battery loading unit is provided in the case and can load a plurality of batteries horizontally and vertically apart.

The heater unit is provided in the case to heat the internal air.

The cooling unit may be provided in the case to cool the internal air of the case to generate and supply temperature control air.

The airflow guide unit can move the temperature-controlled air discharged from the cooling unit to the battery loading unit.

In the solar energy storage device of the present invention, the cooling unit may include a cooling box having an inlet through which internal air flows in and an outlet through which temperature control air is discharged. In this case, the heater unit may be disposed on the inlet side of the cooling box, and one side of the airflow guide unit may be coupled while sealing the outlet of the cooling box.

In the solar energy storage device of the present invention, the airflow guide may include a transition part, a horizontal discharge part, and a vertical discharge part.

The transition part penetrates in the longitudinal direction, and one side may be coupled to the outlet of the cooling part.

The horizontal discharge unit is coupled in communication to the side of the transition unit and extends from the side of the transition unit to the inner wall of the case, but the end may be inclined downward.

One side of the vertical discharge unit is connected in communication with the other side of the transition unit, and the other side extends downward along the inner wall of the case, but may have a plurality of air outlets on the side.

In the solar energy storage device of the present invention, the horizontal discharge part of the airflow guide part includes a first horizontal discharge part and a second horizontal discharge part, and the first horizontal discharge part and the second horizontal discharge part may be symmetrically disposed on the side of the transition part. have.

In the solar energy storage device of the present invention, the air outlet of the vertical outlet may be a jet slit that is cut in the horizontal direction. The ejection slit may be located in a vertical boundary area of the battery.

The solar energy storage device of the present invention may include a fan, which may be coupled to an outlet of the cooling unit, that is, to one side of the transition unit.

According to the solar energy storage device of the present invention having such a configuration, temperature-controlled air is jetted and supplied to the boundary area of the battery loading section through the ejection slit of the vertical discharge section, thereby rapidly supplying and spreading temperature-controlled air to the empty space of the battery loading section. And, as a result, it is possible to prevent or minimize the temperature deviation of the battery loading part. Through this, it is possible to prevent shortening of the life of some batteries, and further maintain the life of all the batteries to the maximum, thereby maximizing the charging/discharging efficiency of the energy storage device.

Further, according to the solar energy storage device of the present invention, since the temperature-controlled air can be quickly supplied to the battery loading section, the battery loading section can be quickly controlled, that is, raised or lowered to a desired temperature.

1 is a perspective view of a solar energy storage device according to the present invention.
2 is a front cross-sectional view of the solar energy storage device according to the present invention.
3 is a side cross-sectional view of a solar energy storage device according to the present invention.
4 is a perspective view showing an airflow guide of the solar energy storage device according to the present invention.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

1 is a perspective view of a solar energy storage device according to the present invention.

1, the solar energy storage device of the present invention includes a case 110, a battery loading unit 120, a battery 130, a compressor 140, a temperature control unit 150, and a charge/discharge control unit 160 ), an inverter 170, an airflow guide 200, and the like.

The case 110 has a space therein, and may be generally configured in a square shape. A door 111 that selectively opens and closes the inside of the case 110 may be provided in front of the case 110.

The battery loading unit 120 loads the battery 130 horizontally and vertically, and may be configured by connecting a plurality of horizontal bars and vertical bars in a grid form. The battery loading part 120 may form a spaced apart between the batteries 130 loaded horizontally and vertically.

The battery 130 may be horizontally and vertically arranged and loaded on the battery loading unit 120. The battery 130 may selectively charge electricity transmitted from a solar panel (not shown) outside the case 110 and discharge stored power when necessary.

The compressor 140 compresses a refrigerant body and may be provided outside the case 110, for example, outside the upper surface of the case 110.

The temperature control unit 150 measures the internal temperature of the case 110, specifically, the temperature of the battery loading unit 120 region, and controls the heater unit and the compressor 140 according to the measured temperature value to control the inside of the case 110. You can adjust the air temperature. The temperature control unit 150 may be configured in the form of a panel on the upper front side of the case 110. The temperature controller 150 may be provided with a plurality of buttons to set the internal temperature of the case 110 to a desired temperature, and may be provided with a screen to display the internal temperature of the case 110 in real time.

If the internal temperature of the case 110 is high, charging/discharging efficiency may be too high, resulting in overcharging or overdischarging, and at low temperatures, electron movement may be deactivated, resulting in low charging/discharging efficiency. In the case of the battery 130 left at a low temperature, normal battery efficiency may be restored only after at least 4 hours have elapsed at room temperature. In this case, loss may occur due to failure to properly store the continuously supplied solar power, and there may also be a problem in that a constant rated output power cannot be maintained because discharge is not performed properly. In particular, in an area with a large daily temperature difference, a large change in battery efficiency can occur. As described above, since the battery 130 is sensitive to temperature, it is necessary to maintain it in a certain temperature range. The temperature control unit 150 controls the temperature of the battery 130 to a certain range, for example, 15 to 30°C, preferably 20 to 25°C.

A plurality of temperature sensors (not shown) may be installed on the inner wall of the case 110, preferably on the battery loading part 120. A temperature sensor (not shown) may measure the temperature of the internal air and transmit it to the temperature controller 150 in real time.

The charge/discharge controller 160 controls charging/discharging of the battery 130 and may perform a function such as controlling the amount of power generation of the solar panel according to the stored power of the battery 130.

The inverter 170 may convert DC electricity transmitted from the solar panel or battery 130 into AC electricity and supply it to a load.

The airflow guide unit 200 supplies temperature control gas to the battery loading unit 120 quickly and uniformly, and the transition unit 210, the first and second horizontal discharge units 221 and 223, the vertical discharge unit 230, etc. Configurable.

The transition unit 210 may distribute the temperature-controlled air to the first and second horizontal discharge units 221 and 223 and the vertical discharge unit 230.

The first and second horizontal discharge units 221 and 223 may be coupled to the sides of the transition unit 210 to discharge temperature-controlled air toward the inner walls of both sides of the case 110.

The vertical discharge unit 230 may be connected in communication with the front of the transition unit 210 to extend downward along an inner wall of one side of the case 110. The vertical discharge unit 230 may directly eject temperature-controlled air to the battery loading unit 120 in a horizontal direction. It may be desirable to arrange the vertical discharge part 230 to be in close contact with the inner wall of the case 110 in the long side direction.

Figure 2 is a front cross-sectional view of the solar energy storage device according to the present invention, Figure 3 is a side cross-sectional view of the solar energy storage device according to the present invention.

As shown in FIGS. 2 and 3, temperature-controlled air may be generated by the cooling unit and the heater unit 180.

The cooling unit cools the internal air of the case 110 to generate and supply temperature-controlled air, and may include a compressor 140, a cooling box 141, a heat exchanger 143, and the like.

The compressor 140 may supply the compressed refrigerant body to the heat exchanger 143.

The cooling box 141 cools the internal air passing therethrough to generate temperature-controlled air and then supplies it to the airflow guide 200, and may include a heat exchanger 143 therein. The cooling box 141 is disposed horizontally and has an inlet T1 on one side (left in FIG. 3) and an outlet T2 on the other side (right in FIG. 3) by opening both ends in the horizontal direction. can do. The outlet (T2) may be configured to be horizontally open (to the right in FIG. 3), but for easy connection with the airflow guide 200 and smooth supply of temperature-controlled air, it is recommended to be configured to be slightly inclined downward as in FIG. It may be desirable.

The heat exchanger 143 cools the internal air passing through the cooling box 141 by expanding the compressed refrigerant body supplied from the compressor 140, and may be disposed in the cooling box 141.

The heater unit 180 may be provided in the case 110 to heat internal air. The heater unit 180 may be disposed adjacent to the inlet T1 of the cooling box 141. The heater unit 180 may be controlled by the temperature controller 150.

The transition part 210 of the airflow guide part 200 may be coupled while one side seals the outlet T2 of the cooling box 141.

A fan 190 may be coupled to one side of the transition part 210. The fan 190 may quickly move the temperature-controlled air in the cooling box 141 into the transition part 210.

The first and second horizontal discharge parts 221 and 223 of the airflow guide 200 are disposed symmetrically on both sides of the transition part 210, and their ends may be inclined in the direction of the battery loading part 120.

The vertical discharge part 230 of the airflow guide part 200 may move the temperature-controlled air discharged from the cooling box 141 to the battery loading part 120. The vertical discharge unit 230 may be provided with a plurality of ejection slits S1 to S3 that are spaced apart along the longitudinal direction to eject temperature-controlled air toward the battery loading unit 120. The ejection slits S1 to S3 may be positioned to correspond to a boundary area of the battery loading unit 120, that is, a space between the battery loaders 130 loaded up and down.

4 is a perspective view showing an airflow guide of the solar energy storage device according to the present invention.

As shown in FIG. 4, the airflow guide part 200 may include a transition part 210, first and second horizontal discharge parts 221 and 223, a vertical discharge part 230, and the like.

The transition part 210 may be formed in a tapered shape having a wider width at the side coupled to the cooling box 141 and a narrower width at the side coupled to the vertical discharge unit 230. The transition part 210 may have a through hole communicating with the first and second horizontal discharge parts 221 and 223 at the sides.

The first and second horizontal discharge units 221 and 223 are coupled while one side communicates with the lateral through-hole of the transition unit 210, and the other side may extend horizontally or horizontally/downward. Ends of the first and second horizontal discharge parts 221 and 223 may extend near the inner wall of the case 110. The first and second horizontal discharge units 221 and 223 are formed of pipes such as square, circular, etc., so that some of the temperature control air in the transition unit 210 can be discharged to the upper sidewall of the case 110 or to the inner upper part of the case 110. have. Ends of the first and second horizontal discharge units 221 and 223 may be configured to be inclined toward the lower side of the case 110, that is, in the direction of the battery loading unit 120, through which temperature-controlled air is smoothly transferred to the battery loading unit 120. Can be made to be supplied.

The vertical discharge part 230 may be coupled to the upper side in communication with the narrow width direction of the transition part 210. The vertical discharge part 230 may extend downward along the inner wall of the case 110. The vertical discharge unit 230 may be configured in the form of a flat pipe. The plurality of ejection slits S1 to S3 formed on one side of the vertical discharge unit 230 may be horizontally cut. The ejection slits S1 to S3 may be configured such that their ends protrude toward the center of the case 110.

In the above description, although it is shown as including one vertical discharge unit 230, the horizontal width of the transition unit 210 is increased, and a plurality of vertical discharge units 230 are spaced apart from the narrow width side of the transition unit 210 Can be placed. In addition, when one vertical discharge unit 230 is included, the width of the vertical discharge unit 230 is increased by the width of the inner wall of the case 110 so that one vertical discharge unit 230 is It can also be made to cover the entire width.

In the above, the technical idea of the present invention has been described through various embodiments, but those skilled in the art will be able to implement the above embodiments by modifying the form. However, since the scope of the present invention is not limited to the above embodiments and is determined by the claims below, such modifications of those skilled in the art can be interpreted as being included in the scope of the present invention.

110: case 111: door
120: battery loading unit 130: battery
140: compressor 141: cooling box
143: heat exchanger 150: temperature control unit
160: charge/discharge control unit 170: inverter
180: heater unit 190: fan
200: air flow guide unit 210: transition unit
221,223: first, second horizontal discharge unit 230: vertical discharge unit
S1~S3: ejection slit T1: inlet
T2: outlet

Claims (6)

In the solar energy storage device,
A case having a space inside;
A battery loading unit provided in the case and storing a plurality of batteries horizontally and vertically apart;
A cooling unit provided in the case and including a cooling box having an inlet through which the internal air flows and an outlet through which the temperature control air is discharged;
A heater part disposed at the inlet side of the cooling box in the case;
An airflow guide part which seals and couples the outlet of the cooling box to move the temperature control air discharged from the cooling part to the battery loading part; And
And a fan coupled to the airflow guide to move the temperature controlled air,
The airflow guide unit
A transition part which penetrates in the longitudinal direction, one side is coupled in communication with the outlet of the cooling part, and has a tapered shape;
One side is connected in communication to the side of the transition unit, the other side extends in the direction of the inner wall of the case, the end is inclined downward, and a horizontal having a first horizontal discharge unit and a second horizontal discharge unit symmetrically disposed on the side of the transition unit Discharge part; And
One side is connected in communication to the other side of the transition unit, and the other side extends downward along the inner wall of the case, is configured in a flat pipe shape, and has a vertical discharge unit having an ejection slit horizontally cut to the side in the vertical boundary area of the battery. Containing, solar energy storage device for easy temperature control. delete delete delete delete delete

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