Battery container

Abstract

A battery container according to one embodiment of the present invention may comprise: a battery pack; a chiller for supplying a cooling liquid to the battery pack; a first pipe communicating with the battery pack; a second pipe communicating with the chiller; and an expansion part which allows the first pipe and the second pipe to communicate with each other and which has a cross-sectional area greater than those of the first pipe and the second pipe.

Description

Battery container

[0001] The present invention relates to a battery container.

[0002] This application is based on Korean Patent Application No. 10-2025-0038077, filed with the Korean Intellectual Property Office on March 25, 2025, the contents of which are incorporated herein in whole by reference, and Korean Patent Application No. 10-2026-0039183, filed with the Korean Intellectual Property Office on March 4, 2026, the contents of which are incorporated herein in whole by reference, and claims priority thereof.

[0003] Currently commercialized rechargeable batteries include nickel-cadmium, nickel-hydrogen, nickel-zinc, and lithium-ion batteries. Among these, lithium-ion batteries are gaining attention for their advantages, such as the ability to charge and discharge freely with almost no memory effect compared to nickel-based batteries, a very low self-discharge rate, and high energy density.

[0004] Recently, as issues such as power shortages and eco-friendly energy have come to the forefront, Energy Storage Systems (ESS) designed to store generated electricity are receiving increased attention. For instance, the Smart Grid System is being proposed as a solution to regulate power supply and demand. The amount of electricity consumed by consumers is not always constant and can fluctuate frequently. A typical example is the sharp increase in electricity usage during the summer afternoon due to the use of air conditioning, followed by a sharp decrease at night. While power consumption is inconsistent and fluctuates frequently, it is realistically difficult for the power supply side to match such consumption levels, even if production is adjusted to some extent. Consequently, this imbalance between supply and consumption can lead to either a surplus or a shortage of power; the Smart Grid System aims to resolve this problem by flexibly storing and regulating electricity. The concept behind the Smart Grid System is to store electricity when there is a surplus in a specific location or time, and then supply that stored electricity to areas or times when there is a power shortage. One of the key components for building such a smart grid system is the energy storage system for storing electricity. Furthermore, with the recent full-scale commercialization of electric vehicles, energy storage systems can also be utilized in facilities for charging electric vehicles, such as charging stations.

[0005] Such an energy storage system may include a plurality of battery containers. A battery container may include a plurality of battery packs. Additionally, a battery container may include a cooling system for cooling the plurality of battery packs.

[0006] The pH of cooling fluids can decrease over time. Cooling fluids with a low pH can damage piping or other components. Therefore, it is important to maintain the pH of the cooling fluid at an appropriate level. To this end, a structure is required that can monitor the pH by extracting a small amount of the cooling fluid.

[0007] The present invention provides a structure capable of extracting a cooling liquid flowing inside a battery container.

[0008] The present invention provides a structure capable of partially lowering the flow rate or pressure of a cooling liquid so that the extraction of the cooling liquid can be performed in a small amount.

[0009] The present invention also provides a structure capable of extracting cooling liquid even while the cooling system is in operation.

[0010] However, the technical problems of the present invention are not limited to those described above, and other unmentioned problems will be clearly understood by those skilled in the art from the description of the invention below.

[0011] A battery container according to one embodiment of the present invention may include: a battery pack; a chiller that supplies a cooling liquid to the battery pack; a first pipe that communicates with the battery pack; a second pipe that communicates with the chiller; and an extension that communicates the first pipe and the second pipe and has a cross-sectional area larger than that of the first pipe and the second pipe.

[0012] The battery container may further include a third pipe communicating with the extension.

[0013] The battery container may further include a valve for opening and closing the third pipe.

[0014] The third pipe may be connected to a portion having a larger cross-sectional area than the first pipe and the second pipe.

[0015] The above extension may include a first part in which the cross-sectional area increases along the direction from the first pipe toward the second pipe.

[0016] The above extension may include a second part in which the cross-sectional area decreases along the direction from the first pipe toward the second pipe.

[0017] The above third pipe can be connected between the above first part and the above second part.

[0018] The above third pipe may be connected to the part with the largest cross-sectional area among the above extensions.

[0019] One end of the above third pipe can be opened.

[0020] An energy storage system according to one aspect of the present invention includes a battery container of the present invention.

[0021] The battery container may further include a fourth pipe through which cooling liquid flowing out from the battery pack flows and which connects the battery pack and the chiller.

[0022] The first pipe above supplies cooling liquid to a plurality of battery packs through a plurality of first branch pipes, and the fourth pipe can recover cooling liquid from a plurality of battery packs through a plurality of second branch pipes.

[0023] The above-mentioned extension may have a spherical or ellipsoidal shape and may have a shape symmetrical with respect to the central axis through which the third pipe is connected.

[0024] The above valve may be any one of a roller clamp, a flow regulator, and an electronic infusion pump.

[0025] The above extension is formed between the first part and the second part and further includes a third part that extends from the first part and has a constant cross-sectional area along the flow direction of the cooling liquid, and the third pipe can be connected to the third part.

[0026] According to at least one of the embodiments of the present invention, a small amount of cooling liquid flowing inside a battery container can be extracted.

[0027] According to at least one of the embodiments of the present invention, a cooling liquid can be extracted even during the operation of the cooling system of a battery container.

[0028] According to at least one of the embodiments of the present invention, the durability of the battery container can be improved.

[0029] The following drawings attached to this specification illustrate preferred embodiments of the present invention and serve to further enhance understanding of the technical concept of the present invention together with the detailed description of the invention provided below; therefore, the present invention should not be interpreted as being limited only to the matters described in such drawings.

[0030] FIG. 1 is a drawing showing a battery container according to one embodiment of the present invention.

[0031] Figure 2 is a diagram showing a partial configuration of the battery container of Figure 1 separated.

[0032] Figure 3 is a drawing showing the container module of Figure 2.

[0033] Figure 4 is a drawing of the door panel of the container module of Figure 3 opened.

[0034] Figure 5 is an enlarged view of part A of Figure 4.

[0035] Figure 6 is a drawing showing the cooling system of the container module of Figure 3.

[0036] Figure 7 is a drawing showing a part of the configuration of Figure 5.

[0037] Figure 8 is a drawing showing the cross-sectional configuration along the cutting line B-B' of Figure 7.

[0038] Figure 9 is a diagram showing the opening of the valve in Figure 8.

[0039] Figure 10 is a drawing showing a modified embodiment of Figure 8.

[0040] In parts of the attached drawings, corresponding components are given the same reference numerals. Those skilled in the art understand that the drawings are intended to illustrate elements simply and clearly and are not necessarily drawn to scale. For example, to aid in understanding various embodiments, the dimensions of some elements depicted in the drawings may be exaggerated compared to others. Additionally, elements of known technology that are useful or essential in commercially viable embodiments may often be omitted so as not to hinder the spirit of the various embodiments of the present invention.

[0041] Hereinafter, embodiments of the present invention will be described with reference to the attached drawings. Prior to this, terms and words used in this specification and claims should not be interpreted as being limited to their ordinary or dictionary meanings, and should be interpreted in a meaning and concept consistent with the technical spirit of the present invention, based on the principle that the inventor can appropriately define the concept of the terms to best describe his invention.

[0042] Therefore, the embodiments described in this specification and the configurations illustrated in the drawings are merely examples of the present invention and do not represent all aspects of the technical concept of the present invention; thus, it should be understood that various equivalents and modifications that can replace them may exist at the time of filing this application.

[0043] FIG. 1 is a drawing showing a battery container (1000) according to an embodiment of the present invention. FIG. 2 is a drawing showing a partial configuration of the battery container (1000) of FIG. 1 separated. FIG. 3 is a drawing showing a container module (200) of FIG. 2. FIG. 4 is a drawing showing the door panel (240) of the container module (200) of FIG. 3 opened.

[0044] Referring to FIGS. 1 to 4, the battery container (1000) may include container modules (200). The container modules (200) may be provided in plurality. The container modules (200) may have a rectangular shape. The container modules (200) may form the exterior of the battery container (1000). The plurality of container modules (200) may be arranged along the left-right direction or the Y-axis direction.

[0045] The container module (200) may include a case (201) that provides space inside. The case (201) may have a rectangular shape. The case (201) may form the exterior of the container module (200).

[0046] The case (201) may include a frame (210). The frame (210) may include an outer frame (211). The outer frame (211) may form the exterior of the case (201). A bottom panel (220) may be fastened, coupled, installed, fixed, or attached to the lower surface of the outer frame (211). The bottom panel (220) may form the exterior of the case (201). A side panel (230) may be fastened, coupled, installed, fixed, or attached to the side of the outer frame (211). The side panel (230) may form the exterior of the case (201). The side panels (230) may be provided as a pair. A pair of side panels (230) may face each other. A rear panel (260) may be fastened, coupled, installed, fixed, or attached to the rear surface of the outer frame (211). The rear panel (260) can form the exterior of the case (201). The top panel (250) can be fastened, coupled, installed, fixed, or attached to the upper surface of the outer frame (211). The top panel (250) can form the exterior of the case (201). The top panel (250) and the bottom panel (220) can face each other. The door panel (240) can be fastened, coupled, installed, fixed, or attached to the front of the outer frame (211). The door panel (240) can form the exterior of the case (201). The door panel (240) and the rear panel (260) can face each other. The door panel (240) can open and close the interior of the case (201). The door panel (240) can be hinge-coupled to the frame (210).

[0047] A battery pack (270) may be housed inside a case (201). The battery pack (270) may include a plurality of battery cells (271). In this case, the battery cell (271) may refer to a secondary battery. The battery pack (270) may be provided in multiple quantities. The battery cell (271) may be a pouch-type secondary battery. However, the shape of the battery cell (271) is not limited to a pouch shape and may have various shapes, such as a cylindrical shape or a rectangular shape.

[0048] The frame (210) may include an inner frame (212). The inner frame (212) may be provided inside the case (201). The inner frame (212) may extend along the vertical direction or the Z-axis direction. A bracket (280) may be provided inside the case (201). The bracket (280) may be fastened, coupled, installed, fixed, or attached to the inner frame (212). A battery pack (270) may be fastened, coupled, installed, fixed, or attached to the bracket (280). A plurality of battery packs (270) may be arranged along the vertical direction or the Z-axis direction. A plurality of battery packs (270) may be arranged along the horizontal direction or the Y-axis direction. A plurality of battery packs (270) may be arranged along the front-rear direction or the X-axis direction. A battery pack (270) may also be referred to as a battery module (270), a battery assembly (270), or a battery stack (270).

[0049] The base panel assembly (100) may have a rectangular shape. The base panel assembly (100) may provide space inside. A container module (200) may be installed, fastened, joined, or fixed on top of the base panel assembly (100). A plurality of container modules (200) may be installed, fastened, joined, or fixed on top of the base panel assembly (100).

[0050] The base panel assembly (100) may include a base frame (110). The base frame (110) may form the exterior of the base panel assembly (100).

[0051] The base panel assembly (100) may include a base panel (130). The base panel (130) may be installed, fastened, joined, or fixed to the base frame (110).

[0052] The base panel assembly (100) may include a tank (140). The tank (140) may be connected to a container module (200). The tank (140) may store liquid leaked from the container module (200). The tank (140) may be accommodated, installed, coupled, fastened, or fixed inside the base panel assembly (100).

[0053] The control module (290) may be installed, fastened, coupled, or fixed on top of the base panel assembly (100). The control module (290) may be electrically connected to the container module (200). The control module (290) may be electrically connected to each of the plurality of container modules (200). The control module (290) may control the charging, discharging, or temperature, etc., of the container module (200).

[0054] FIG. 5 is an enlarged view of part A of FIG. 4. FIG. 6 is a drawing showing the cooling system of the container module (200) of FIG. 3. FIG. 7 is a drawing showing a part of the configuration of FIG. 5.

[0055] Referring to FIGS. 5 through 7, the container module (200) may include a first pipe (510). The first pipe (510) may be placed, installed, or fixed inside the case (201). The first pipe (510) may be in communication with a battery pack (270). The first pipe (510) may be in communication with a plurality of battery packs (270). The first pipe (510) may be in communication with a plurality of first branch pipes (511). Each of the plurality of first branch pipes (511) may be in communication with a battery pack (270). A cooling liquid (CL, see FIG. 8) may flow along the first pipe (510). For example, the cooling liquid (CL) may be water. The cooling liquid (CL) may flow along the first branch pipe (511). Cooling liquid (CL) can flow into or out of the interior of the battery pack (270) along the first branch pipe (511). Cooling liquid (CL) can flow into the battery pack (270) and perform heat exchange. Cooling liquid (CL) can be supplied into the interior of the battery pack (270) through the first branch pipe (511). Cooling liquid (CL) can flow out of the battery pack (270) through the first branch pipe (511). The first pipe (510) can be connected to the expansion section (400). Cooling liquid (CL) can flow into the expansion section (400) through the first pipe (510). Cooling liquid (CL) can flow out of the expansion section (400) through the first pipe (510).

[0056] The extension (400) may be located on top of the bottom panel (220). The extension (400) may be located in front of the plurality of battery packs (270). The extension (400) may be located between the plurality of battery packs (270) and the door panel (240).

[0057] The container module (200) may include a second pipe (520). The second pipe (520) may be placed, installed, or fixed inside the case (201). The second pipe (520) may be in communication with the extension (400). Cooling liquid (CL) may flow out from the extension (400) through the second pipe (520). Cooling liquid (CL) may flow into the extension (400) through the second pipe (520).

[0058] The container module (200) may include a third pipe (530). The third pipe (530) may be placed, installed, or fixed inside the case (201). One end of the third pipe (530) may be in communication with the extension (400). The other end of the third pipe (530) may be open. The third pipe (530) may be located between the first pipe (510) and the second pipe (520).

[0059] The valve (550) may be installed, coupled, connected, or provided in the third pipe (530). The valve (550) may open and close the third pipe (530). The valve (550) may allow the cooling liquid (CL) to flow out by opening the third pipe (530).

[0060] For example, the valve (550) may be a roller clamp. For example, the valve (550) may be a flow regulator. For example, the valve (550) may be an electronic infusion pump.

[0061] The second pipe (520) may be connected to the chiller (300). The chiller (300) may be installed, coupled, fastened, connected, or fixed to the door panel (240). The chiller (300) may supply cooling liquid (CL) to the battery pack (270). The cooling liquid (CL) may flow into or out of the chiller (300) through the second pipe (520). The chiller (300) may include a heat exchanger (310), a compressor (320), or a condenser (330). The chiller (300) may be equipped with a refrigerant. The refrigerant may circulate through the heat exchanger (310), the compressor (320), or the condenser (330). The cooling liquid (CL) may exchange heat with the refrigerant through the heat exchanger (310). The temperature of the high-temperature cooling liquid (CL) may be lowered through the heat exchanger (310). The cooling liquid (CL) flowing into the chiller (300) may have a high temperature. The cooling liquid (CL) flowing out of the chiller (300) may have a low temperature.

[0062] The container module (200) may include a fourth pipe (540). The fourth pipe (540) may be placed, installed, or fixed inside the case (201). The fourth pipe (540) may be in communication with a battery pack (270). The fourth pipe (540) may be in communication with a plurality of battery packs (270). The fourth pipe (540) may be in communication with a plurality of second branch pipes (541). A plurality of second branch pipes (541) may each be in communication with a battery pack (270). A cooling liquid (CL) may flow along the fourth pipe (540). A cooling liquid (CL) may flow along the second branch pipe (541). A cooling liquid (CL) may flow into or out of the interior of the battery pack (270) along the second branch pipe (541). Cooling liquid (CL) can be introduced into the battery pack (270) for heat exchange. Cooling liquid (CL) can be supplied into the interior of the battery pack (270) through the second branch pipe (541). Cooling liquid (CL) can be discharged from the battery pack (270) through the second branch pipe (541). Each battery pack (270) can be connected to the first branch pipe (511) and the second branch pipe (541).

[0063] The cooling liquid (CL) supplied from the chiller (300) can flow through the fourth pipe (540). The cooling liquid (CL) can be introduced into the battery pack (270) through the second branch pipe (541). After heat exchange with the battery pack (270), the cooling liquid (CL) can be discharged from the battery pack (270) through the first branch pipe (511). The cooling liquid (CL) can be introduced into the first pipe (510). The cooling liquid (CL) can be introduced into the expansion section (400). The cooling liquid (CL) can be introduced into the chiller (300) through the second pipe (520).

[0064] Alternatively, the cooling liquid (CL) supplied from the chiller (300) may flow through the second pipe (520). The cooling liquid (CL) may flow into the expansion section (400). The cooling liquid (CL) may flow out of the expansion section (400) through the first pipe (510). The cooling liquid (CL) may flow into the battery pack (270) through the first branch pipe (511). After heat exchange with the battery pack (270), the cooling liquid (CL) may flow out of the battery pack (270) through the second branch pipe (541). The cooling liquid (CL) may flow into the fourth pipe (540). The cooling liquid (CL) may flow into the chiller (300) through the fourth pipe (540).

[0065] FIG. 8 is a drawing showing a cross-sectional configuration along the cutting line B-B' of FIG. 7. FIG. 9 is a drawing showing the opening of the valve (550) in FIG. 8.

[0066] Referring to FIGS. 7 through 9, the expansion portion (400) may have a spherical shape. Alternatively, the expansion portion (400) may have an ellipsoidal shape. The expansion portion (400) may include an inlet (401). The inlet (401) may be in communication with the first pipe (510). The expansion portion (400) may include an outlet (402). The outlet (402) may be in communication with the second pipe (520).

[0067] The expansion section (400) may include a first part (410). The cross-sectional area of ​​the first part (410) may increase along the direction from the first pipe (510) toward the second pipe (520). The cross-sectional area of ​​the first part (410) may increase along the -Y axis direction. The cross-sectional area of ​​the first part (410) may increase along the flow direction of the cooling liquid (CL). The cross-sectional area of ​​the first part (410) may increase along the direction from the inlet (401) toward the outlet (402). The first part (410) may have a larger cross-sectional area than the first pipe (510). The first part (410) may have a larger cross-sectional area than the second pipe (520). In this case, the cross-sectional area may refer to the cross-section in the direction perpendicular to the Y axis. The cooling liquid (CL) flows through the first part (410), and the flow velocity may be reduced. The flow rate of the cooling liquid (CL) flowing through the first part (410) may be lower than the flow rate of the cooling liquid (CL) flowing through the first pipe (510). The flow rate of the cooling liquid (CL) flowing through the first part (410) may be lower than the flow rate of the cooling liquid (CL) flowing through the second pipe (520).

[0068] The extension (400) may include a second part (420). The second part (420) may extend from the first part (410). The first part (410) and the second part (420) may be configured to be symmetric with respect to the axis of symmetry D. The cross-sectional area of ​​the second part (420) may decrease along the direction from the first pipe (510) toward the second pipe (520). The cross-sectional area of ​​the second part (420) may decrease along the -Y axis direction. The cross-sectional area of ​​the second part (420) may decrease along the flow direction of the cooling liquid (CL). The cross-sectional area of ​​the second part (420) may decrease along the direction from the inlet (401) toward the outlet (402). The second part (420) may have a larger cross-sectional area than the first pipe (510). The second part (420) may have a larger cross-sectional area than the second pipe (520). The cooling liquid (CL) flows through the second part (420) and the flow rate may increase. The flow rate of the cooling liquid (CL) flowing through the second part (420) may be lower than the flow rate of the cooling liquid (CL) flowing through the first pipe (510). The flow rate of the cooling liquid (CL) flowing through the second part (420) may be lower than the flow rate of the cooling liquid (CL) flowing through the second pipe (520).

[0069] The extension (400) may include an extraction port (403). The extraction port (403) may be in communication with a third pipe (530). The third pipe (530) may be in communication with the extension (400) having a cross-sectional area larger than that of the first pipe (510). The third pipe (530) may be in communication with the extension (400) having a cross-sectional area larger than that of the second pipe (520).

[0070] The flow rate of the cooling liquid (CL) flowing through the extraction port (403) may be lower than the flow rate of the cooling liquid (CL) flowing through the first pipe (510). The flow rate of the cooling liquid (CL) flowing through the extraction port (403) may be lower than the flow rate of the cooling liquid (CL) flowing through the second pipe (520).

[0071] When the valve (550) is opened, the cooling liquid (CL) can be discharged through the third pipe (530). At this time, the condition of the extracted cooling liquid (CL) can be checked. For example, the pH of the cooling liquid (CL) can be measured and used for maintenance or repair of the cooling system.

[0072] The amount of cooling liquid (CL) circulating in the cooling system may be reduced due to the extraction of cooling liquid (CL). Since the extraction of cooling liquid (CL) can lead to a lack of flow rate within the circulation system and a decrease in cooling efficiency, controlling the amount of cooling liquid (CL) extracted may be preferred in terms of optimizing the cooling cycle. The third pipe (530) can reduce the amount of cooling liquid (CL) extracted by extracting cooling liquid (CL) with a reduced flow rate as it passes through the expansion section (400). As a result, the reduction in the pressure of the cooling liquid (CL) can be minimized.

[0073] The third pipe (530) can be connected between the first part (410) and the second part (420). As a result, the third pipe (530) can reduce the amount of cooling liquid (CL) extracted by extracting cooling liquid (CL) with a reduced flow rate.

[0074] The third pipe (530) can be connected to the part of the expansion section (400) with the largest cross-sectional area in the direction perpendicular to the Y-axis. As a result, the third pipe (530) can reduce the amount of cooling liquid (CL) extracted by extracting the cooling liquid (CL) with the lowest flow rate.

[0075] In addition, by extracting the cooling liquid (CL) with reduced flow rate, the operating state of the cooling system can be maintained. The cooling system can be maintained without stopping to extract the cooling liquid (CL).

[0076] Figure 10 is a drawing showing a modified embodiment of Figure 8.

[0077] Referring to FIG. 10, the extension (400) may further include a third part (430). The third part (430) may be formed between the first part (410) and the second part (420). The third part (430) may extend from the first part (410). The second part (420) may extend from the third part (430). The third part (430) may connect the first part (410) and the third part (430). The third part (430) may have a constant cross-sectional area along the Y-axis direction. The cooling liquid (CL) passing through the third part (430) may maintain a constant flow rate. The flow rate of the cooling liquid (CL) passing through the third part (430) may be lower than the flow rate of the cooling liquid (CL) passing through the first part (410). The flow rate of the cooling liquid (CL) passing through the third part (430) may be lower than the flow rate of the cooling liquid (CL) passing through the second part (420).

[0078] An extraction port (403) may be formed in the third part (430). A third pipe (530) may be connected to the third part (430). By connecting the third pipe (530) to the third part (430), the cooling liquid (CL) can be stably extracted.

[0079] An energy storage system (ESS) according to the present invention may include a plurality of battery containers (1000) according to the present invention. Such an energy storage system may form a link group with a combination of a certain number of battery containers (1000) and a control container.

[0080] Meanwhile, although terms indicating directions such as up, down, left, right, front, and back have been used in this specification, these terms are used merely for convenience of explanation, and it is obvious to those skilled in the art that they may vary depending on the location of the object or the position of the observer.

[0081] As described above, although the present invention has been explained by limited embodiments and drawings, the present invention is not limited thereto, and it is obvious that various modifications and variations are possible within the scope of the technical spirit of the present invention and the equivalent scope of the claims described below by those skilled in the art to which the present invention belongs.

Claims

1. Battery pack; A chiller that supplies cooling liquid to the above battery pack; A first pipe communicating with the above battery pack; A second pipe communicating with the above chiller; and, A battery container comprising an extension having a larger cross-sectional area than the first pipe and the second pipe, connecting the first pipe and the second pipe.

2. In Paragraph 1, A battery container further comprising a third pipe communicating with the above-mentioned extension.

3. In Paragraph 2, A battery container further comprising a valve for opening and closing the third pipe.

4. In Paragraph 2, The above third pipe is, A battery container connected to a portion having a cross-sectional area larger than the first pipe and the second pipe.

5. In Paragraph 2, The above extension is, A battery container comprising a first part having an increasing cross-sectional area along the direction from the first pipe toward the second pipe.

6. In Paragraph 5, The above extension is, A battery container comprising a second part having a cross-sectional area that decreases along the direction from the first pipe toward the second pipe.

7. In Paragraph 6, The above third pipe is a battery container connected between the above first part and the above second part.

8. In Paragraph 2, The above third pipe is, A battery container connected to the part with the largest cross-sectional area among the above-mentioned extensions.

9. In Paragraph 2, One end of the above third pipe is an open battery container.

10. In Paragraph 1, A battery container further comprising a fourth pipe through which a cooling liquid flowing out from the battery pack flows and which connects the battery pack and the chiller.

11. In Paragraph 10, The first pipe above supplies cooling liquid to a plurality of battery packs through a plurality of first branch pipes, and The above-mentioned fourth pipe is a battery container that recovers cooling liquid from a plurality of battery packs through a plurality of second branch pipes.

12. In Paragraph 2, The above-mentioned extension has a spherical or elliptical shape and is a battery container having a shape symmetrical with respect to a central axis through which the third pipe is connected.

13. In Paragraph 3, A battery container in which the above valve may be any one of a roller clamp, a flow regulator, and an electronic infusion pump.

14. In Paragraph 6, The above extension is, A battery container further comprising a third part formed between the first part and the second part, extending from the first part and having a constant cross-sectional area along the flow direction of the cooling liquid, wherein the third pipe is connected to the third part.

15. An energy storage system comprising a battery container according to any one of claims 1 to 14.

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