Cooling case of photovoltaic connected ess

Abstract

The present invention relates to a cooling case structure for a solar-linked ESS, and more specifically, to a cooling case structure for a solar-linked ESS developed to efficiently cool a battery module equipped in an Energy Storage System (ESS) that stores electricity produced using solar power and can use it when electricity is needed. The present invention comprises a battery module (102) formed by bundling a plurality of batteries; an upper fan (104) installed by covering the upper part of the battery module (102); and a lower cooling case (106) in which the battery module (102) is housed and installed to cool the high heat generated from the battery module (102), wherein a plurality of cooling channels (22) are formed on the lower surface of the lower cooling case (106) by pneumatic expansion using a roll bonding rolling method. The cooling case structure of the solar-linked ESS according to the present invention can significantly reduce costs by manufacturing the water-cooled heat dissipation device using a roll-bonding rolling method, and has the effect of stabilizing the output of renewable energy through the charging and discharging of power produced in the power generation system, and has the excellent effect of greatly improving the reliability of the device by improving power quality.

Description

Technology Field

[0001] The present invention relates to a cooling case structure for a solar-linked ESS, and more specifically, to a cooling case structure for a solar-linked ESS developed to efficiently cool a battery module equipped in an Energy Storage System (ESS) that stores electricity produced using solar power and can use it when electricity is needed. Background Technology

[0003] Recently, with the advancement of energy development technology, technologies utilizing wind, tidal, and solar energy are continuously being developed.

[0004] In particular, technology that generates electricity using solar energy involves collecting solar heat to generate electricity, and solar energy, which produces electricity from solar cells using sunlight, is widely used.

[0005] To use solar energy, a Power Conversion System (PCS) for an Energy Storage System (ESS) is used.

[0006] Energy Storage Systems (ESS, hereinafter referred to as 'ESS') are installed and utilized in power generation, transmission and distribution systems and are used for functions such as frequency regulation, stabilization of generator output using new and renewable energy, peak shaving, load leveling, and emergency power supply.

[0007] In addition, the energy storage system supplies power by discharging the stored power when power is needed. At this time, it is equipped with a Battery Conditioning System (BCS), and the installed batteries are equipped with a power converter having a power conversion element for charging and discharging power to supply power to the grid and converting direct current into alternating current.

[0008] In an Energy Storage System (ESS), the temperature inside the sealed battery pack can easily rise due to battery operation or solar radiation, and since the batteries used are vulnerable to heat, they can easily fail if continuously exposed to a high-temperature environment.

[0009] Therefore, continuous temperature management within the battery pack is necessary. While it is possible to manage the internal temperature using air conditioning systems by utilizing the power stored in the battery of the power storage device, it is advisable to use external power due to the very large amount of power consumed.

[0010] However, since these power storage devices are often installed in locations where it is difficult to supply external power, there was a problem in that they were difficult to use when the external power supply was intermittently interrupted.

[0011] Therefore, there was a need for a cooling system capable of sufficiently suppressing temperature rise even in environments where the internal temperature of the battery pack could rise significantly while using a continuously supplied, small power source.

[0012] In response to the demands of such realistic technology development, the applicant has developed an ESS cooling case structure capable of efficiently suppressing the temperature increase of the ESS battery while rapidly cooling it. Prior art literature

[0014] Korean Registered Patent No. 10-1776160 (Registered September 1, 2017) Korean Registered Patent No. 10-2122288 (Registered June 8, 2020) The problem to be solved

[0015] The present invention was devised to solve the above-mentioned problems, and aims to provide a cooling case structure for a solar-linked ESS that can solve the heat generation problem of the battery and efficiently cool it by reducing the area occupied by the cooling system by more than half, improve the cooling performance of the battery module to be more suitable for large-scale ESS power plants of 100MW or more, while simultaneously ensuring reliability and excellently solving the heat generation problem.

[0016] The present invention aims to provide a cooling case structure for a photovoltaic ESS by manufacturing a cooling channel on the outer surface of a battery pack using a roll bonding rolling method and pneumatic expansion molding, so that it can be installed to have an energy density nearly twice as high as that of an air-cooled ESS and the installation area can be reduced by more than 35%, thereby significantly reducing construction costs.

[0017] The present invention aims to provide a cooling case structure for a solar-linked ESS that can be manufactured at a low cost by manufacturing a cooling channel as a case-integrated unit in the battery pack case for installing the battery module.

[0018] The objectives and technical problems to be solved by the present invention are not limited to those described above. Therefore, other technical problems not mentioned will be clearly understood by those skilled in the art from the description below. means of solving the problem

[0020] The present invention comprises a battery module (102) formed by bundling a plurality of batteries; an upper fan (104) installed by covering the upper part of the battery module (102); and a lower cooling case (106) in which the battery module (102) is housed and installed to cool the high heat generated from the battery module (102), wherein a plurality of cooling channels (22) are formed on the lower surface of the lower cooling case (106) by pneumatic expansion using a roll bonding rolling method.

[0021] The lower cooling case (106) above is,

[0022] A case body (10) having a front portion (16), side portions (20, 21), and rear portion (18), and a storage portion (12) formed on the inside to accommodate the battery module (102);

[0023] It is preferable to further provide a connecting cooling channel (23) in the shape of an L (ㄴ) that is attached and molded to the front portion (16) of the case body (10).

[0024] A connecting member body (24) formed on the front portion (16) of the case body (10) of the lower cooling case (106) to communicate with the cooling channel (22) and allow cooling water to flow in;

[0025] It is preferable to further provide a supply connection member (110) that is connected and installed on the front of the above connection member body (24) and guides the inflow of cooling water. Effects of the invention

[0027] The cooling case structure of the solar-linked ESS according to the present invention can significantly reduce costs by manufacturing the water-cooled heat dissipation device using a roll-bonding rolling method, and has the effect of stabilizing the output of renewable energy through the charging and discharging of power produced in the power generation system, and has the excellent effect of greatly improving the reliability of the device by improving power quality. Brief explanation of the drawing

[0029] FIGS. 1 and 2 are perspective views showing the structure of the cooling case of the photovoltaic ESS according to the present invention. FIG. 3 is an exploded perspective view showing the structure of the cooling case of the photovoltaic ESS according to the present invention. FIG. 4 is a partial cross-sectional view showing the structure of the cooling case of the photovoltaic ESS according to the present invention. FIG. 5 is a cross-sectional view showing the structure of an embodiment of a cooling plate of a cooling case structure of a photovoltaic ESS according to the present invention. Specific details for implementing the invention

[0030] The following objects, other objects, features, and advantages of the present invention will be easily understood through the following preferred embodiments associated with the accompanying drawings. However, the present invention is not limited to the embodiments described herein and may be embodied in other forms.

[0031] Rather, the embodiments introduced herein are provided to ensure that the disclosed content is thorough and complete, and to ensure that the spirit of the invention is sufficiently conveyed to those skilled in the art.

[0032] The embodiments described and illustrated herein also include complementary embodiments.

[0033] In this specification, the singular form includes the plural form unless specifically stated otherwise in the text. Components referred to as 'comprise' and / or 'comprising' as used in this specification do not exclude the presence or addition of one or more other components.

[0034] Hereinafter, specific embodiments according to the cooling case structure of the solar power-linked ESS of the present invention will be described.

[0035] FIGS. 1 and 2 are perspective views showing the structure of the cooling case structure of the ESS for solar power connection according to the present invention, FIG. 3 is an exploded perspective view showing the structure of the cooling case structure of the ESS for solar power connection according to the present invention, and FIG. 4 is a partial cross-sectional view showing the structure of the cooling case structure of the ESS for solar power connection according to the present invention.

[0036] And, FIG. 5 is a cross-sectional view showing the structure of an embodiment of a cooling plate of a cooling case structure of a photovoltaic ESS for solar power connection according to the present invention.

[0037] Referring to FIGS. 1 to 5, the cooling case structure of the ESS for solar power connection of the present invention is described. First, as shown in FIGS. 1 and 2, the cooling case structure (100) of the ESS for solar power connection of the present invention includes, first, a battery module (102), an upper fan (104), and a lower cooling case (106).

[0038] A battery module (102) is formed in which a plurality of the above-mentioned modular batteries are bundled into a package, an upper fan (104) is placed over the upper part of the battery module (102), and a lower cooling case (106) is installed on the lower part of the battery module (102).

[0039] The upper fan (104) has a storage space formed in a concave shape on the inside, and the end edges of the downward-facing sides are bent into an L-shape to form a flange.

[0040] The lower cooling case (106) has a storage space formed in a concave shape on its inner side, and the aforementioned battery module (102) is stored and installed in the storage space.

[0041] The above battery module (102) is equipped in an energy storage system (ESS) that stores generated power and takes it out to use when power is needed. At this time, high heat is generated in the battery module (102) as power energy is used, and the heat generated in the battery module (102) is cooled using the lower cooling case (106).

[0042] As shown in FIG. 3, a cooling channel (22) through which cooling water is supplied and discharged is formed in the lower cooling case (106). It is preferable that the cooling channel (22) be formed as a single unit with the lower cooling case by rolling and then pneumatic expansion molding after rolling by roll bonding.

[0043] FIG. 3 is an exploded perspective view showing the structure of the cooling case structure of the solar power-linked ESS of the present invention. To explain the cooling case (100) of the present invention in more detail, first, a battery module (102) in which a plurality of batteries are bundled into a package is formed, and an upper fan (104) is covered on the upper part of the battery module (102).

[0044] The upper fan (104) has an upper fan body (11) formed with a storage space formed on the inner side, and the lower front, rear, left, and right sides of the upper fan body (11) are bent into an L-shape to form a flange portion (13).

[0045] The upper fan (104) is installed to cover the upper part of the battery module (104) and protects the battery module (104).

[0046] The above bakery package (104) is inserted and installed inside the lower cooling case (106).

[0047] The lower cooling case (106) has a rectangular case body (10) formed therein, and a storage portion (12) is formed on the inner side of the case body (10) so that the battery module (102) can be seated thereon, and the battery module (102) is seated thereon.

[0048] At this time, the battery module (102) is installed so as to be in close contact with the lower surface of the lower cooling case (106), and a cooling means (108) is formed on the outer bottom surface of the lower cooling case (106), and cooling water is circulated and supplied to the cooling means (108) to cool the high heat generated from the battery module (102).

[0049] A front portion (16) is formed on the front of the case body (10), a rear portion (18) is formed on the rear, and side portions (20, 21) are formed on the left and right sides, respectively.

[0050] And a plurality of cooling channels (22) through which cooling water circulates are formed in the cooling means (108) formed on the lower surface of the lower cooling case (106).

[0051] Additionally, a supply connection member (110) is connected to one end of the cooling means (108), and a discharge connection member (112) is formed to the other end of the cooling means (108).

[0052] The supply connection member (110) is formed with a rectangular connection member body (24) formed vertically at the inlet end of the cooling means (108), and an inlet hole (26) is formed horizontally in the center of the connection member body (24), and the discharge connection member (112) is formed with a rectangular connection member body (28) formed vertically at the discharge end of the cooling means (108), and a discharge hole (30) is formed horizontally in the center of the connection member body (28).

[0053] That is, the supply connection member (110) and the discharge connection member (112) are formed by being erected vertically in a vertical direction, and the cooling channel (22) is formed in a zigzag or maze-like pattern on the bottom surface, and the cooling channel (22) is formed to be connected to the connecting cooling channel (23) in an L-shape at the front end.

[0054] Next, a supply connection joint (114) is connected and installed on the left side of the supply connection member (110), and a discharge connection joint (116) is connected and installed on the left side of the discharge connection member (112).

[0055] The above supply connection joint (114) has a cylindrical joint body (32) formed therein, a connecting hole (34) is formed through the inner part of the joint body (32) from left to right, and a connecting body (36) is formed at the front end of the joint body (32), wherein a connecting hole (38) is formed in the connecting body (36).

[0056] The joint body (32) is preferably connected to the aforementioned supply connection member (110) so that the connection hole (34) communicates with the inlet hole (26) to supply and flow cooling water, and the connection hole (36) of the connection body (36) is preferably connected by fitting the front end of the supply hose (118).

[0057] It is preferable to use a quick coupler that can be freely attached and detached with one touch for the supply connection joint (114), and it is preferable that the connection hole (34) be formed in a circular diameter shape, but furthermore, in various shapes such as an arch shape, an orifice shape, or a wave shape, so as to maintain a smooth flow of cooling water flowing in from the supply hose (118) and so that the cooling water can flow smoothly through the connection cooling channel (23) formed by connecting the supply connection member (110) in an L shape.

[0058] The above discharge connection joint (116) is formed with a cylindrical joint body (40), a connecting hole (42) is formed through the inner part of the joint body (40) from left to right, and a connecting body (44) is formed at the front end of the joint body (40), wherein a discharge hole (46) is formed in the connecting body (44).

[0059] It is preferable that the joint body (40) is connected to the aforementioned discharge connection member (112) so that the connection hole (42) communicates with the discharge hole (30) to discharge cooling water, and that the discharge hole (30) of the connection body (28) is connected by fitting the front end of the discharge hose (120).

[0060] The discharge connection joint (116) is preferably formed to be inserted and removed with a single touch and is preferably a quick coupler that can be freely attached and detached. The connection hole (42) is preferably formed in a circular diameter shape, but furthermore, it is preferably formed in various shapes such as an arch shape, an orifice shape, or a wave shape, so that the flow of cooling water circulating through the discharge hose (120) and discharged through the cooling passage (22, 23) is maintained at a speed of at least 1 to 2 times the inflow speed from the supply hose, and so that the cooling water can be discharged quickly through the connected cooling passage (23) formed by connecting the discharge connection member (112) in an L shape.

[0061] Meanwhile, a supply hose (118) for supplying cooling water is connected to the supply connection joint (114), and a discharge hose (120) for discharging circulating discharge water is connected to the discharge connection joint (116) after cooling the battery module (102) installed in the lower cooling case (106).

[0062] Continuing, FIG. 4 is a cross-sectional view of the present invention, wherein a battery module (102) is housed and installed in the storage portion (12) of the upper fan (104) and the lower cooling case (106), and a cooling means (108) is formed on the lower surface of the lower cooling case (106) and is installed so as to cool the high heat generated from the battery module (102) by the cooling means (108).

[0063] The thickness of the flange portion (13) of the upper fan (104) and the thickness of the flange portion (14) of the lower cooling case (106) may be the same thickness, or the thickness of the lower cooling case (106) may be formed to be thinner by 1 / 2 to 1 / 3.

[0064] It is preferable that the above cooling means (108) be formed by pneumatic expansion by roll bonding on the lower surface of the lower cooling case (106) to a thickness of 1-5 mm so that the cooling water can flow smoothly.

[0065] A plurality of cooling channels (22) having a zigzag pattern are formed in the cooling means (108), and a connecting cooling channel (23) formed in the shape of an L is connected to the left end of the cooling channel (22). The connecting cooling channel (23) is formed to protrude from the front part (16) of the case body (10) of the lower cooling case (106) and is formed to be connected to an inlet hole (26) formed in the connecting member body (24) of the supply connecting member (110).

[0066] At this time, the inlet hole (26) is formed in a horizontal direction, and the connecting cooling channel (23) is formed to extend downward in a vertical direction, so that the connecting hole (34) and the inlet hole (26) are connected so that the flow of cooling water entering through the inlet hole (26) flows smoothly and quickly.

[0067] The above connecting hole (34) is formed with a predetermined diameter to have a circular cross-section, and the above inlet hole (26) is formed with the same diameter as the above connecting hole (34).

[0068] It is preferable that the above-mentioned cooling channel (22) is also formed on the four sides of the front (16), side (20, 21), and rear (18) of the lower cooling case (106).

[0069] FIG. 5 is another embodiment of the present invention,

[0070] It is preferable that the above cooling means (108) be formed by pneumatic expansion molding on the lower surface of the lower cooling case (106) by a roll bonding rolling method to protrude to a thickness of 1-5 mm so that the cooling water can flow smoothly.

[0071] A plurality of cooling channels (22) having a zigzag pattern are formed in the cooling means (108), and a connecting cooling channel (23) formed in the shape of an L is connected to the left end of the cooling channel (22). The connecting cooling channel (23) is formed to protrude from the front part (16) of the case body (10) of the lower cooling case (106) and is formed to be connected to an inlet hole (26) formed in the connecting member body (24) of the supply connecting member (110).

[0072] At this time, the joint body (32) is formed, and a connecting hole (52) is formed on the inner side of the joint body (32). A lower flow guide (48) is formed on the lower surface of the connecting hole (52) in an arch shape with a predetermined thickness, and an upper flow guide (50) is formed on the upper surface of the inner side of the connecting hole (52) in a convex arch shape toward the center. At this time, the upper flow guide (50) is formed to protrude 1.5 to 2.5 times more than the lower flow guide (48) so that the flow of cooling water becomes gentle when communicating with the connecting hole (26), thereby inducing a smoother downward flow to the right, such as an arrow.

[0073] Additionally, an upper flow round section (56) is formed on the inner upper side of the inlet hole (26), and a lower flow round section (58) is formed on the inner lower side of the inlet hole (26), so that the cooling water flowing in through the connecting hole (52) flows in through the connecting cooling channel (23).

[0074] The above-mentioned connection cooling channel (23) is formed by extending downward in a vertical direction, so that the flow of cooling water entering through the connection hole (52) flows smoothly and quickly, and the upper flow round section (58) is formed concavely upward to minimize collisions that occur when the cooling water enters in a horizontal direction, and the lower flow round section (56) is formed as a round with a gentle diameter to widen the inlet part so that the flow velocity of the cooling water becomes slow and gentle, thereby minimizing vibration.

[0075] At the same time, the guide hole (54) vertically connected to the inlet hole (26) formed in the body (24) of the connecting member is formed vertically downward and has a predetermined slope, and the predetermined slope is formed to be 1 / 100 to 1 / 500 so as to minimize noise caused by the cooling water flowing in through the L-shaped connecting cooling channel (23) hitting the front part (16).

[0076] The technical problems to be solved by the present invention are not limited to those mentioned above, and other unmentioned technical problems can be implemented in various ways by a person skilled in the art to which the present invention belongs based on the description below, and technical modifications within such scope shall be considered to be within the scope of the present invention. Explanation of the symbols

[0078] 10 : Case body 12 : Storage compartment 14: Flange section 15: Elastic support piece 16 : Front 18: Rear view 20, 21: Side view 22 : Cooling channel 23 : Cooling channel 24,28 : Connecting member body 26 : Inlet 30 : Outlet 32 : Joint body 34 : Connecting hole 36 : Connection body 38 : Connection hole 40 : Joint body 42 : Connecting hole 44: Connection body 46: Discharge port 100 : Cooling case 102 : Battery module 104 : Top fan 106 : Bottom cooling case 108 : Cooling means 110 : Supply connection member 112: Discharge connection member 114: Supply connection joint 116 : Discharge connection joint 118 : Supply hose 120 : Discharge hose

Claims

Claim 1 A battery module (102) formed by bundling a plurality of batteries; an upper fan (104) installed by covering the upper part of the battery module (102); and a lower cooling case (106) for housing the battery module (102) and cooling the high heat generated from the battery module (102), wherein a plurality of cooling channels (22) are formed by pneumatic expansion in the lower surface of the lower cooling case (106) using a roll bonding rolling method, and the lower cooling case (106) comprises a case body (10) having a front surface (16), side surfaces (20, 21), and a rear surface (18), and a housing portion (12) formed inside to house the battery module (102); and further provided with a connecting cooling channel (23) in the shape of an L-shape attached to the front surface (16) of the case body (10), and the case of the lower cooling case (106). A cooling case for a photovoltaic ESS, characterized in that the front portion (16) of the body (10) is further provided with a connecting member body (24) formed to communicate with the cooling channel (22) to allow cooling water to flow in; and a supply connecting member (110) connected to the front of the connecting member body (24) to guide the flow of cooling water, wherein the cooling channel (22), which is pneumatically expanded by a roll bonding rolling method, has a thickness of 3-5 mm and is formed in a zigzag shape, and a connecting cooling channel (23) formed in the shape of an L is connected to the left end of the cooling channel (22), and the connecting cooling channel (23) is formed to protrude from the front portion (16) of the case body (10) of the lower cooling case (106) and is formed to be connected to an inlet hole (26) formed in the connecting member body (24) of the supply connecting member (110), and at this time,A cylindrical joint body (32) is formed, a connecting hole (52) is formed on the inner side of the joint body (32), a lower flow guide (48) is formed on the lower surface of the connecting hole (52) to have thickness in an arch shape, and an upper flow guide (50) is formed on the inner upper surface of the connecting hole (52) in a convex arch shape toward the center. At this time, the upper flow guide (50) is formed to protrude 1.5 to 2.5 times more than the lower flow guide (48) so that the flow of cooling water becomes smooth when communicating with the inlet hole (26). Additionally, an upper flow rounded portion (56) is formed on the inner upper side of the inlet hole (26), and a lower flow rounded portion (58) is formed on the inner lower side of the inlet hole (26) so that cooling water flowing in through the connecting hole (52) flows in through the connecting cooling channel (23), and the connecting cooling channel (23) is formed in a vertical direction A cooling case for a photovoltaic ESS, characterized in that it is formed by extending downward, so that the flow of cooling water entering through the connecting hole (52) flows smoothly and quickly, and the upper flow round portion (58) is formed concavely upward to minimize collisions occurring when the cooling water enters in a horizontal direction, and the lower flow round portion (56) is formed as a round with a gentle diameter to widen the inlet portion so that the flow velocity of the cooling water becomes slow and gentle, thereby minimizing vibration; and at the same time, a guide hole (54) vertically connected to the inlet hole (26) formed in the connecting member body (24) is formed vertically downward but has a slope, and the slope is formed to be 1 / 100 to 1 / 500. Claim 2 delete Claim 3 delete

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