Five-megawatt-hour high-capacity energy storage container

Abstract

A cluster frame is a vertical stand column combined welding type cluster frame, the cluster frame comprises stand columns, a bottom frame and a supporting frame, the stand columns are vertically arranged in an array mode at equal intervals, the bottom frame is arranged at the bottoms of the stand columns in a transverse and horizontal connection mode, and the supporting frame is arranged on the bottom frame. Supporting frames are symmetrically arranged on the two faces of the stand columns which are horizontally flush and opposite in the left-right direction, the supporting frames are right-angle steel bar-shaped sectional materials, the supporting frames are longitudinally connected with the stand columns which are longitudinally flush and opposite in the front-back direction, and the top ends of the stand columns are connected with the upper surface of the inner side of the electrical cabin in a welded mode. The bottom face of the bottom frame is connected with the lower surface of the inner side of the electrical cabin in a welded mode, the cluster frame stand columns are welded to the cabin body bottom frame and the upper top and evenly distributed in the cabin body, the strength is high, the bearing capacity is high, the structural strength and the bearing capacity of the whole cabin are greatly improved, the bearing capacity is improved, more space is provided for the electrical cabin, and the service life of the electrical cabin is prolonged. And the safety and the heat dissipation performance of the whole system are improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of energy storage containers, and specifically relates to a five-megawatt-hour large-capacity energy storage container. Background Art

[0002] With the development of electric energy storage technology and the demand of the new energy market, liquid cooling solutions have become the mainstream solution for energy storage systems in a short period of time. However, low-capacity liquid-cooled energy storage systems can no longer meet customer needs. Therefore, large-capacity energy storage liquid cooling systems have appeared on the market, such as 5MWh and 6MWh. Large-capacity energy storage systems have further increased the requirements for the structural strength and carrying capacity of containers. Under the same cabin size, how to arrange more battery packs, reasonably solve the heat dissipation of the battery packs, and prevent the cabin from being deformed by stress during lifting have become difficult problems that everyone needs to overcome.

[0003] The existing 20-foot standard cabin is 6058*2438*2896 (mm) in length, width and height. Taking the 5MWh container energy storage system as an example, a single battery pack is 1P52S, the battery cell capacity is 314Ah, and the battery compartment is composed of 12 clusters, each with 8 packs, for a total of 96 packs. In terms of length, the total length of the 12 clusters is about 5500mm. Considering that the electrical compartment and the battery compartment need to be separated by a partition wall, and the minimum thickness of the partition wall is 50mm, the theoretical length left for the electrical compartment is 2000mm. The space is only 500mm long. In such a compact space, the electrical compartment needs to house the convergence control cabinet and the fire protection system. This makes it difficult to ensure the safety of electricity use in the entire compartment. Therefore, the length of the cabin can be appropriately increased. The traditional cluster frame is welded on the outside and then moved into the cabin to be welded to the bottom of the cabin. The total weight of the photovoltaic battery pack is about 33t. After the battery pack is fixed to the cluster frame, the cabin is easily torn and deformed during the lifting and transportation process. Therefore, the connection method and structural method of the cluster frame and the cabin need to be newly optimized. Utility Model Content

[0004] In order to solve the above problems, this paper proposes a 5MWh large-capacity energy storage container, which includes a main cabin, a liquid cooling unit and a junction cabinet. An electrical cabin is arranged inside the main cabin, and cluster frames are welded on the upper and lower surfaces of the interior of the electrical cabin. The cluster frame is a vertical column combined welded cluster frame, which includes columns, a base frame and a support frame. The columns are arranged vertically in an array with equal distances from each other, and the bottom of the columns is horizontally connected to the base frame, and the left and right horizontally flush columns are symmetrically provided on both sides. The support frame is a right-angle steel strip profile, and the support frame is longitudinally connected to the front and rear longitudinally flush columns. The top of the column is welded to the inner upper surface of the electrical compartment, the bottom surface of the base frame is welded to the inner lower surface of the electrical compartment, battery packs are provided between the columns and above the support frame, and the cluster frame structure is redesigned by combining the cluster frame that was originally connected by bolts and angle brackets. The cluster frame columns are welded to the bottom frame and the upper top of the cabin body, evenly arranged inside the cabin body, forming a whole with the cabin body, and directly welded inside the container. It has high strength and strong carrying capacity, which greatly enhances the structural strength and carrying capacity of the entire cabin, improves the carrying capacity, provides more space for the electrical cabin, and improves the safety and heat dissipation of the entire system.

[0005] The outer contour dimensions of the main cabin are 6500*2600*2896 (mm). A liquid cooling chamber and a confluence chamber are flushly connected inside one end of the main cabin. The liquid cooling chamber and the confluence chamber are both laterally symmetrically arranged inside one end of the main cabin. One side surface of the liquid cooling chamber and the confluence chamber are flush with the outer end surface of the main cabin. An electrical cabin is separated from the other inner side of the liquid cooling chamber and the confluence chamber. A liquid cooling unit is arranged inside the liquid cooling chamber. A confluence cabinet is arranged inside the confluence chamber. The overall size of the 5MWh cabin is adjusted to 6500*2600*2896 (mm), leaving more space for fire protection, electrical and liquid cooling pipelines. While arranging the battery pack reasonably, the heat dissipation and power safety of the entire container system are fully considered.

[0006] A top cover is provided on the outer upper surface of the main cabin body, and a plurality of strip folding ribs are longitudinally and parallelly provided in the middle of the top cover. Drainage grooves are provided at the four corners of the top cover, and a drainage groove is added on the top to prevent rainwater from accumulating on the top of the container.

[0007] The uprights are square steel, and are arranged equidistantly and side by side in the horizontal direction. Two groups of uprights are symmetrically arranged between the longitudinal columns based on the transverse center line of the main cabin. The longitudinal spacing between the uprights in each group is less than the length of the battery pack, and the spacing between the two groups of uprights is greater than twice the distance that the battery pack protrudes from the outer surface of the uprights. The tops of the uprights are welded to the inner top surface of the electrical cabin, and the lateral spacing between the uprights is the same as the width of the battery pack. The chassis is flat steel bars, and the chassis is transversely arranged at the bottom of the uprights that are equidistant and flush with each other in the horizontal direction. The width of the chassis is greater than the width of the uprights, and the length of the chassis is the same as the inner length of the electrical cabin. The supports are arranged in an equidistant array on the inner surface between the uprights, and the supports are symmetrically arranged between the uprights that are equidistant in the horizontal direction. The spacing between the upper and lower supports is greater than the height of the battery pack. The cluster frame is made into an integral type and is directly welded inside the container. It has high strength and strong bearing capacity, which solves the problem of welding the cluster frame after entering the cabin and reduces the waiting time due to the incomplete processing of the cluster frame.

[0008] Beneficial effects:

[0009] The cluster frame, which was originally connected by bolts and angle brackets, was redesigned. The cluster frame columns were welded to the bottom frame and top of the cabin, evenly arranged inside the cabin to form a whole with the cabin. It was directly welded inside the container with high strength and strong load-bearing capacity, which greatly enhanced the structural strength and load-bearing capacity of the entire cabin, improved the load-bearing capacity, provided more space for the electrical compartment, and improved the safety and heat dissipation of the entire system.

[0010] The overall size of the 5MWh cabin is adjusted to 6500*2600*2896 (mm), leaving more space for fire protection, electrical and liquid cooling pipelines. While reasonably arranging the battery pack, the heat dissipation and power safety of the entire container system are fully considered.

[0011] Add drainage grooves on the top to prevent rainwater from accumulating on the top of the container.

[0012] The cluster frame is made into an integral type and is directly welded inside the container. It has high strength and strong load-bearing capacity, which solves the problem of welding the cluster frame after it is put into the cabin and reduces the waiting time due to the incomplete processing of the cluster frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the outside of a five-megawatt-hour large-capacity energy storage container;

[0014] Figure 2 This is a side view of the interior of a five-megawatt-hour large-capacity energy storage container;

[0015] Figure 3 This is a schematic diagram of the internal structure of a five-megawatt-hour large-capacity energy storage container;

[0016] Figure 4 This is a schematic diagram of a cluster frame of a five-megawatt-hour large-capacity energy storage container;

[0017] In the figure; 1. main cabin, 11. liquid cooling chamber, 12. junction chamber, 2. top cover, 3. liquid cooling unit, 4. junction cabinet, 5. electrical cabin, 6. cluster rack, 7. battery pack. DETAILED DESCRIPTION

[0018] In order to deepen the understanding of the present invention, the present invention will be further described in detail below in conjunction with embodiments and drawings. The embodiments are only used to explain the present invention and do not constitute a limitation on the protection scope of the present invention.

[0019] Main cabin 1, liquid cooling chamber 11, junction chamber 12, top cover plate 2, liquid cooling unit 3, junction cabinet 4, electrical cabin 5, cluster rack 6, battery pack 7.

[0020] like Figure 1 , 2 , 3, 4 as shown;

[0021] A 5MWh large-capacity energy storage container, the energy storage container includes a main cabin 1, a liquid cooling unit 3 and a junction cabinet 4, an electrical cabin 5 is arranged inside the main cabin 1, and a cluster frame 6 is welded on both the upper and lower surfaces of the interior of the electrical cabin 5, the cluster frame 6 is a vertical column combined welded cluster frame 6, the cluster frame 6 includes columns, a bottom frame and a support frame, the columns are arranged vertically in an array with equal distances from each other, the bottom of the columns are horizontally connected to the bottom frame, and the left and right horizontally flush columns are symmetrically arranged on both sides, and the support frame is a right-angle steel strip profile, and the support frame is longitudinally connected to the front and rear The vertically flush columns are connected to each other, the top of the column is welded to the inner upper surface of the electrical compartment 5, the bottom surface of the chassis is welded to the inner lower surface of the electrical compartment 5, and battery packs 7 are arranged between the columns and above the support frame. The outer contour size of the main cabin body 1 is 6500*2600*2896 (mm), and a liquid cooling chamber 11 and a confluence chamber 12 are arranged in a flush manner inside one end of the main cabin body 1. The liquid cooling chamber 11 and the confluence chamber 12 are both arranged in a transversely symmetrical manner inside one end of the main cabin body 1, and one side surface of the liquid cooling chamber 11 and the confluence chamber 12 are connected to the main cabin body 1. The outer end surfaces are flush with each other, the other inner side of the liquid cooling chamber 11 and the confluence chamber 12 is separated by an electrical cabin 5, a liquid cooling unit 3 is arranged inside the liquid cooling chamber 11, and a confluence cabinet 4 is arranged inside the confluence chamber 12. A top cover plate 2 is arranged on the outer upper surface of the main cabin body 1, and a plurality of strip folded plate ribs are arranged longitudinally and parallelly in the middle of the top cover plate 2. Drainage grooves are arranged at the four corners of the top cover plate 2. The columns are square and rigid, and the columns are arranged side by side and equidistantly in the horizontal direction. Two groups of longitudinal columns are symmetrically arranged with the transverse center line of the main cabin body 1 as the reference, and the longitudinal spacing between the columns of each group is less than the battery The length of the package 7, the spacing between the two groups of columns is greater than twice the distance that the battery pack 7 protrudes from the outer surface of the column, the top of the column is welded to the inner top surface of the electrical compartment 5, the lateral spacing between the columns is the same as the width of the battery pack 7, the base frame is flat bar steel, the base frame is laterally arranged at the bottom of the columns that are equidistant and flush with each other, the width of the base frame is greater than the width of the column, the length of the base frame is the same as the internal length of the electrical compartment 5, the support frames are equidistantly arrayed on the inner surface between the columns, the supports are symmetrically arranged between the columns that are equidistant laterally, and the spacing between the upper and lower supports is greater than the height of the battery pack 7.

[0022] Implementation examples;

[0023] Based on the current mainstream battery pack 71P52S in the market, the battery cell uses 280Ah, and the capacity of the entire pack can be calculated as 3.2*280*52=46592Wh=46.6Kwh.

[0024] The battery pack 7 designed in this scheme is 1P104S, and the battery cell is calculated as 314Ah, so the capacity of the battery pack 7 = 3.2*314*104 = 104499Wh = 104.5Kwh.

[0025] Through calculation, it can be concluded that the capacity of the whole pack will be doubled, and the number of battery packs 7 required for a battery system of the same capacity will also be reduced, and the cost can be saved by 30%-40%;

[0026] The whole package design structure is more compact, which can achieve the maximum capacity demand within the limited cabin space and occupy a small area. Based on the calculation of a single prefabricated cabin of 5Mwh, the original plan required two 2.54Mwh prefabricated cabins. After adopting the new design, only one prefabricated cabin is needed to complete it; the economic benefits are significantly improved;

[0027] The cluster frame 6 is made into an integral type and is directly welded inside the container, so it has high strength and strong bearing capacity, which solves the problem of welding the cluster frame 6 after entering the container and reduces the waiting time due to the incomplete processing of the cluster frame 6.

[0028] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A 5MWh large-capacity energy storage container, comprising a main cabin, a liquid cooling unit and a junction cabinet, wherein an electrical cabin is arranged inside the main cabin, characterized in that: The upper and lower surfaces of the interior of the electrical compartment are welded with cluster frames, which are vertical column combined welded cluster frames, including columns, a base frame and a support frame. The columns are vertically arranged in an array with equal distances, and the bottom of the columns are horizontally connected to the base frame, and the left and right horizontally opposite columns are symmetrically provided with support frames. The support frames are right-angle steel bar profiles, and the support frames are longitudinally connected to the front and rear longitudinally opposite columns. The top of the column is welded to the inner upper surface of the electrical compartment, and the bottom of the base frame is welded to the inner lower surface of the electrical compartment. Battery packs are provided between the columns and above the support frames.

2. A 5MWh large-capacity energy storage container according to claim 1, characterized in that: The outer contour dimensions of the main cabin body are 6500*2600*2896 (mm), and a liquid cooling chamber and a confluence chamber are provided inside one end of the main cabin body in a flush and connected manner. The liquid cooling chamber and the confluence chamber are both laterally symmetrically arranged inside one end of the main cabin body, and one side surface of the liquid cooling chamber and the confluence chamber are flush with the outer end surface of the main cabin body, and an electrical cabin is provided on the other inner side of the liquid cooling chamber and the confluence chamber in a separated manner.

3. A 5MWh large-capacity energy storage container according to claim 2, characterized in that: A liquid cooling unit is arranged inside the liquid cooling cavity, and a junction cabinet is arranged inside the junction cavity.

4. A 5MWh large-capacity energy storage container according to claim 1, characterized in that: A top cover plate is arranged on the outer upper surface of the main cabin body, a plurality of strip-shaped folded plate ribs are arranged in parallel in the middle of the top cover plate, and drainage grooves are arranged at the four corners of the top cover plate.

5. A 5MWh large-capacity energy storage container according to claim 1, characterized in that: The columns are square and rigid, and are arranged side by side and equidistantly in the horizontal direction. Two groups of longitudinal columns are symmetrically arranged with the transverse center line of the main cabin as the reference. The longitudinal spacing between the columns of each group is less than the length of the battery pack, and the spacing between the two groups of columns is greater than twice the distance that the battery pack protrudes from the outer surface of the column. The top of the column is welded to the inner top surface of the electrical cabin, and the lateral spacing between the columns is the same as the width of the battery pack.

6. A 5MWh large-capacity energy storage container according to claim 1, characterized in that: The base frame is a flat steel bar, which is transversely arranged at the bottom of columns that are equidistant and flush with each other transversely. The width of the base frame is greater than the width of the columns, and the length of the base frame is the same as the internal length of the electrical cabin.

7. A 5MWh large-capacity energy storage container according to claim 1, characterized in that: The equidistant array of the supports is arranged on the inner surface between the columns, the supports are symmetrically arranged between the columns that are equidistant in the horizontal direction, and the spacing between the supports between the upper and lower supports is greater than the height of the battery pack.

Images