Energy storage system

Abstract

The utility model provides an energy storage system, and relates to the field of energy storage equipment. The energy storage system comprises a prefabricated cabin and a plurality of battery packs, the battery packs are all arranged in the prefabricated cabin, each battery pack comprises a shell and a preset number of battery modules, each battery module comprises a plurality of battery cells, the battery cells are stacked in the first direction, the preset number of battery modules are divided into two columns, the two columns of battery modules are arranged in the first direction, and the shell is arranged in the shell. The battery modules in each column are arranged along a second direction; the plurality of battery packs are divided into three columns, the three columns of battery packs are arranged along the first direction, and each column of battery packs is arranged along the third direction. Thus, only three rows of battery packs are arranged in the prefabricated cabin, the space occupied by the supporting components between the battery pack rows is reduced, and the space in the prefabricated cabin can be more fully utilized. By adopting the arrangement mode, the number of the battery cells which can be arranged in a limited space is increased, so that the charging capacity of the energy storage system is improved.

Description

Technical Field

[0001] The present application relates to the field of energy storage devices, and in particular to an energy storage system. Background Art

[0002] With the development of battery technology, container energy storage systems are increasingly being used. Container energy storage systems include prefabricated cabins and multiple battery packs, which are stacked and fixed in the prefabricated cabins. The length, width and height of the existing standard prefabricated cabins are 6058mm, 3438mm and 2896mm respectively. The height can be adjusted according to demand, but the height of the standard prefabricated cabin is not higher than 3100mm.

[0003] Existing battery packs generally include four battery modules, which are arranged in two rows. The width of the entire battery module is about 1160mm, the height is about 245mm, and the depth is about 2220mm. In a standard prefabricated cabin, the battery pack can be arranged in 6 rows and 8 layers according to the optimal arrangement method. Support rods are set between two adjacent rows of battery packs to support the battery pack. At this time, the height of the standard prefabricated cabin needs to be increased to 3100mm, and the maximum capacity of the container energy storage system is 5.01MWh. In this way, the capacity of the container energy storage system is insufficient, and there is still room for improvement. Utility Model Content

[0004] In view of this, the present application provides an energy storage system to solve the problem that the existing energy storage system has insufficient installed capacity and there is still room for improvement.

[0005] The present application provides an energy storage system, the energy storage system comprising a prefabricated cabin and a plurality of battery packs, the plurality of battery packs are arranged inside the prefabricated cabin, the battery pack comprises a shell and a predetermined number of battery modules, the battery module comprises a plurality of battery cells, the plurality of battery cells are stacked along a first direction, the predetermined number of battery modules are divided into two columns, the battery modules in the two columns are arranged along the first direction, and the battery modules in each column are arranged along a second direction;

[0006] The plurality of battery packs are divided into three columns, the battery packs in the three columns are arranged along the first direction, and the battery packs in each column are arranged along the third direction;

[0007] The first direction is parallel to a thickness direction of the battery cell, the second direction is parallel to a length direction of the battery cell, and the third direction is parallel to a width direction of the battery cell.

[0008] Preferably, the predetermined number is 8, and 9 battery packs are arranged in each column.

[0009] Preferably, the predetermined number is 16, the battery modules in each column are arranged in two layers, the battery modules on both sides are arranged along the third direction, and 5 battery packs are provided in each column.

[0010] Preferably, the energy storage system further comprises a high-voltage box, and every two battery packs are connected to the same high-voltage box.

[0011] Preferably, the energy storage system further includes a plurality of high-voltage boxes, the plurality of high-voltage boxes correspond one-to-one to the plurality of battery packs, and the high-voltage boxes are connected to the corresponding battery packs.

[0012] Preferably, the energy storage system further comprises four supporting members, the four supporting members are arranged at intervals along the first direction, a row of battery packs is arranged between any two adjacent supporting members, and the battery packs are connected to the supporting members.

[0013] Preferably, the battery pack located at the bottom of each column of the battery packs and the prefabricated cabin enclose an accommodation space, and the high-voltage box is arranged in the accommodation space.

[0014] Preferably, the energy storage system further comprises a cooling water machine and a combiner cabinet, and the cooling water machine and the combiner cabinet are arranged on a side of the support member located at the edge facing away from the battery pack.

[0015] Preferably, the length of the battery core is 500 mm, the width of the battery core is 215 mm, and the thickness of the battery core is 26 mm;

[0016] The capacity of the battery cell is 325Ah, and each battery module includes 25 battery cells.

[0017] Preferably, the size of the battery pack in the first direction is less than or equal to 1600 mm, the size of the battery pack in the second direction is less than or equal to 2220 mm, and the size of the battery pack in the third direction is 245 mm.

[0018] In the energy storage system of the present application, the battery pack in the energy storage system includes a shell and a predetermined number of battery modules, the battery module includes a plurality of battery cells, the plurality of battery cells are stacked along a first direction, the predetermined number of battery modules are divided into two columns, the two columns of battery modules are arranged along the first direction, and the battery modules in each column are arranged along the second direction. Only three columns of battery packs are arranged in the prefabricated cabin, which reduces the space occupied by the supporting components between the battery pack columns and enables more full utilization of the space in the prefabricated cabin. The above arrangement method is adopted, so that the number of battery cells that can be arranged in a limited space is increased, thereby improving the power capacity of the energy storage system. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 A schematic diagram showing the structure of a battery module is shown;

[0021] Figure 2 A schematic diagram showing the structure of a battery pack in Embodiment 1 is shown;

[0022] Figure 3 A schematic structural diagram showing a perspective of the energy storage system of the first embodiment;

[0023] Figure 4 A schematic diagram showing the structure of the energy storage system of Embodiment 1 from another perspective;

[0024] Figure 5 A schematic structural diagram of an energy storage system according to a second embodiment is shown.

[0025] Icons: 1-prefabricated cabin; 2-battery pack; 21-shell; 22-battery module; 221-battery cell; 3-support structure; 4-high-voltage box; 5-cooling water machine; 6-manifold; L1-first direction; L2-second direction; L3-third direction. DETAILED DESCRIPTION

[0026] The following specific embodiments are provided to help the reader obtain a comprehensive understanding of the methods, devices and / or systems described herein. However, after understanding the disclosure of the present application, various changes, modifications and equivalents of the methods, devices and / or systems described herein will be apparent. For example, the order of operations described herein is merely an example, and is not limited to the order set forth herein, but in addition to the operations that must occur in a particular order, changes that will be apparent after understanding the disclosure of the present application may be made. In addition, in order to improve clarity and brevity, descriptions of features known in the art may be omitted.

[0027] The features described herein may be implemented in different forms and should not be interpreted as being limited to the examples described herein. Rather, the examples described herein have been provided only to illustrate some of the many possible ways of implementing the methods, devices and / or systems described herein that will be apparent after understanding the disclosure of the present application.

[0028] Throughout the specification, when an element (such as a layer, a region, or a substrate) is described as being “on”, “connected to”, “bound to”, “over”, or “covering” another element, it may be directly “on”, “connected to”, “bound to”, “over”, or “covering” another element, or one or more other elements may be present between them. In contrast, when an element is described as being “directly on”, “directly connected to”, “directly bound to”, “directly over”, or “directly covering” another element, there may be no other elements present between them.

[0029] As used herein, the term "and / or" includes any one of the associated listed items and any combination of any two or more items.

[0030] Although terms such as "first," "second," and "third" may be used herein to describe various members, components, regions, layers, or portions, these members, components, regions, layers, or portions are not limited by these terms. Rather, these terms are only used to distinguish one member, component, region, layer, or portion from another member, component, region, layer, or portion. Therefore, without departing from the teachings of the examples described herein, the first member, component, region, layer, or portion referred to may also be referred to as the second member, component, region, layer, or portion.

[0031] For ease of description, spatial relational terms such as "above", "upper", "below", and "lower" may be used herein to describe the relationship of one element to another element as shown in the accompanying drawings. Such spatial relational terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the accompanying drawings. For example, if the device in the accompanying drawings is turned over, an element described as being "above" or "upper" relative to another element will subsequently be "below" or "lower" relative to the other element. Therefore, the term "above" includes both "above" and "below" orientations depending on the spatial orientation of the device. The device may also be positioned in other ways (e.g., rotated 90 degrees or in other orientations), and the spatial relational terms used herein will be interpreted accordingly.

[0032] The terms used herein are only used to describe various examples and are not used to limit the present disclosure. Unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. The terms "include", "comprise" and "have" list the stated features, quantities, operations, components, elements and / or their combinations that exist, but do not exclude the existence or addition of one or more other features, quantities, operations, components, elements and / or their combinations.

[0033] Variations in the shapes shown in the drawings may occur due to manufacturing techniques and / or tolerances. Therefore, the examples described herein are not limited to the specific shapes shown in the drawings but include variations in shapes that occur during manufacturing.

[0034] The features of the examples described herein may be combined in various ways that will be apparent after understanding the disclosure of the present application. In addition, although the examples described herein have various configurations, other configurations are possible as will be apparent after understanding the disclosure of the present application.

[0035] The following will be combined Figures 1 to 5 For the energy storage system of this application, Figures 1 to 5 In the embodiment, the first direction L1, the second direction L2 and the third direction L3 are perpendicular to each other, the first direction L1 is parallel to the thickness direction of the battery cell 221, the second direction L2 is parallel to the length direction of the battery cell 221, and the third direction L3 is parallel to the width direction of the battery cell 221.

[0036] The energy storage system includes a prefabricated cabin 1 and a plurality of battery packs 2. The plurality of battery packs 2 are arranged inside the prefabricated cabin 1. Figure 1 As shown, the battery pack 2 includes a housing 21 and a predetermined number of battery modules 22, the battery module 22 includes a plurality of battery cells 221, and the plurality of battery cells 221 are stacked along a first direction L1. Figure 2 As shown, the predetermined number of battery modules 22 are divided into two columns, the two columns of battery modules 22 are arranged along the first direction L1, and the battery modules 22 in each column are arranged along the second direction L2. Figures 3 to 5 As shown, multiple battery packs 2 are divided into three columns, and the three columns of battery packs 2 are arranged along the first direction L1, and each column of battery packs 2 is arranged along the third direction L3. In this way, only three columns of battery packs 2 are arranged in the prefabricated cabin 1, which reduces the space occupied by the support members 3 between the columns of battery packs 2 and the columns of battery packs 2, so that the space in the prefabricated cabin 1 can be more fully utilized. The above arrangement method increases the number of battery cells 221 that can be arranged in a limited space, thereby improving the power capacity of the energy storage system.

[0037] Furthermore, the length of the battery cell 221 in the battery module 22 is 500 mm, the width of the battery cell 221 is 215 mm, the thickness of the battery cell 221 is 26 mm, the capacity of the battery cell 221 is 325 Ah, and each battery module 22 includes 25 battery cells 221 .

[0038] Optionally, the predetermined number is 8 or 16, that is, the battery pack 2 may include 8 or 16 battery modules 22. The above two types of battery packs 2 and energy storage systems having the above two types of battery packs 2 will be described below in combination with Embodiment 1 and Embodiment 2.

[0039] Embodiment 1

[0040] In this embodiment, if Figure 3 and Figure 4 As shown, each battery pack 2 includes 8 battery modules 22, which are arranged in two columns in the housing 21, each column includes 4 battery modules 22, and the capacity of one battery pack 2 is 208 kwh. Three columns of battery packs 2 are arranged in the entire energy storage system, and 9 battery packs 2 are arranged in each column.

[0041] Furthermore, the size of the entire battery pack 2 in the first direction L1 is 1600 mm, the size of the battery pack 2 in the second direction L2 is 2220 mm, and the size of the battery pack 2 in the third direction L3 is 245 mm.

[0042] In this embodiment, the total installed capacity of 27 battery packs 2 arranged in 3 rows and 9 layers is 5.6 MWh, that is, the installed capacity of the energy storage system is 5.6 MWh, which is 0.6 MWh more than that of the existing energy storage system.

[0043] Optionally, in actual application of the energy storage system, two battery packs 2 can be combined to form a cluster, so the number of battery packs 2 required is an even number. At this time, 27 battery packs 2 can be combined to form 13 clusters, and the remaining battery pack 2 can be used as a backup battery pack 2. When one of the battery packs 2 fails, the battery pack 2 can be used to replace the failed battery pack 2. The energy storage system formed in this way has a capacity of 5.4MWh, which is 0.4MWh more than the existing energy storage system, and the capacity has increased by about 8%. Under the same floor space, the capacity has increased and the cost of the energy storage system has decreased.

[0044] The capacity of the energy storage system formed by the battery pack 2 and the arrangement of the battery pack 2 in this embodiment is improved. If the capacity of the battery cell 221 in the battery module 22 is upgraded to 350Ah, the capacity of the energy storage system with 13 clusters can reach 5.8MWh.

[0045] In this embodiment, the dimensions of the prefabricated cabin 1 in the first direction L1, the second direction L2 and the third direction L3 are all standard dimensions of the prefabricated cabin 1, that is, the dimension of the prefabricated cabin 1 in the first direction L1 is 6058 mm, the dimension of the prefabricated cabin 1 in the second direction L2 is 2438 mm, and the dimension of the prefabricated cabin 1 in the third direction L3 can be 2896 mm.

[0046] Embodiment 2

[0047] In this embodiment, if Figure 5 As shown, each battery pack 2 includes 16 battery modules 22, each column includes 8 battery modules 22, each column is divided into two layers, each layer is provided with 4 battery modules 22, and the entire battery pack 2 is a double-layer structure. The capacity of a battery pack 2 is 416 kwh. Three columns of battery packs 2 are provided in the entire energy storage system, and 5 battery packs 2 are provided in each column.

[0048] In this embodiment, the total installed capacity of 15 battery packs 2 arranged in 3 rows and 5 layers is 6.2 MWh, that is, the installed capacity of the energy storage system is 6.2 MWh, which is 1.2 MWh more than that of the existing energy storage system.

[0049] In this embodiment, the two layers of battery modules 22 in each battery pack 2 form a cluster, the entire energy storage system includes 15 clusters, and each battery pack 2 is correspondingly provided with a high-voltage box 4.

[0050] The capacity of the energy storage system formed by the battery pack 2 and the arrangement of the battery pack 2 in this embodiment is improved. If the capacity of the battery cell 221 in the battery module 22 is upgraded to 350Ah, the capacity of the energy storage system with 15 clusters can reach 6.7MWh.

[0051] In this embodiment, the dimensions of the prefabricated cabin 1 in the first direction L1 and the third direction L3 are both standard dimensions of the prefabricated cabin 1, that is, the dimension of the prefabricated cabin 1 in the first direction L1 is 6058 mm, and the dimension of the prefabricated cabin 1 in the second direction L2 can be 2438 mm. The dimension of the prefabricated cabin 1 in the third direction L3 needs to be increased to 3100 mm. The prefabricated cabin 1 is increased in height while meeting the dimension requirement of the prefabricated cabin 1 in the second direction L2, so that the installed capacity of the energy storage system is greatly increased and the cost of the energy storage system is reduced.

[0052] In the above-mentioned embodiment 1 and embodiment 2, Figures 3 to 5 As shown, the energy storage system also includes a support member 3, the number of the support members 3 is four, the support member 3 includes a support plate and a supporting plate, the support plate is perpendicular to the first direction L1, the supporting plate is perpendicular to the second direction L2, and the supporting plate extends from the support plate. When the battery pack 2 is placed in the prefabricated cabin 1, the battery pack 2 can be supported by the supporting plates included in the support members 3 on both sides.

[0053] Furthermore, in the above two embodiments, the battery pack 2 at the bottom of each column of battery packs 2 and the bottom wall of the prefabricated cabin 1 enclose an accommodation space, and the high-voltage box 4 is arranged in the accommodation space.

[0054] In addition, in the above two embodiments, the energy storage system further includes a cooling water machine 5 and a combiner cabinet 6, which are arranged on the side of the support member 3 located at the edge facing away from the battery pack 2. After the support member 3 and the battery pack 2 are arranged, a certain amount of space remains inside the prefabricated cabin 1 in the first direction L1, and the cooling water machine 5 and the combiner cabinet 6 are arranged in the space.

[0055] Through the arrangement of the present application, the number of battery cells 221 that can be arranged in a limited space is increased, thereby improving the power capacity of the energy storage system.

[0056] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. An energy storage system, characterized in that: The energy storage system comprises a prefabricated cabin and a plurality of battery packs, wherein the plurality of battery packs are arranged inside the prefabricated cabin, the battery pack comprises a shell and a predetermined number of battery modules, the battery module comprises a plurality of battery cells, the plurality of battery cells are stacked along a first direction, the predetermined number of battery modules are divided into two columns, the battery modules in the two columns are arranged along the first direction, and the battery modules in each column are arranged along a second direction; The plurality of battery packs are divided into three columns, the battery packs in the three columns are arranged along the first direction, and the battery packs in each column are arranged along the third direction; The first direction is parallel to a thickness direction of the battery cell, the second direction is parallel to a length direction of the battery cell, and the third direction is parallel to a width direction of the battery cell.

2. The energy storage system according to claim 1, characterized in that: The predetermined number is 8, and 9 battery packs are arranged in each column.

3. The energy storage system according to claim 1, characterized in that: The predetermined number is 16, the battery modules in each column are arranged in two layers, the battery modules on both sides are arranged along the third direction, and 5 battery packs are arranged in each column.

4. The energy storage system according to claim 2, characterized in that: The energy storage system further includes a high-voltage box, and every two battery packs are connected to the same high-voltage box.

5. The energy storage system according to claim 3, characterized in that: The energy storage system further includes a plurality of high-voltage boxes, each of which corresponds to each of the plurality of battery packs, and each of the high-voltage boxes is connected to the corresponding battery packs.

6. The energy storage system according to claim 4 or 5, characterized in that: The energy storage system further includes four support members, which are arranged at intervals along the first direction, and a row of battery packs is arranged between any two adjacent support members, and the battery packs are connected to the support members.

7. The energy storage system according to claim 6, characterized in that: The battery packs at the bottom of each row of battery packs and the prefabricated cabin enclose an accommodation space, and the high-voltage box is arranged in the accommodation space.

8. The energy storage system according to claim 6, characterized in that: The energy storage system further includes a cooling water machine and a combiner cabinet, and the cooling water machine and the combiner cabinet are arranged on a side of the support member located at the edge facing away from the battery pack.

9. The energy storage system according to claim 1, characterized in that: The length of the battery core is 500 mm, the width of the battery core is 215 mm, and the thickness of the battery core is 26 mm; The capacity of the battery cell is 325Ah, and each battery module includes 25 battery cells.

10. The energy storage system according to claim 2, characterized in that: The size of the battery pack in the first direction is less than or equal to 1600 mm, the size of the battery pack in the second direction is less than or equal to 2220 mm, and the size of the battery pack in the third direction is 245 mm.

Images