Energy storage device

Abstract

The utility model discloses energy storage equipment which comprises a box body, a plurality of battery clusters and a liquid cooling water machine, and the battery clusters are located in the box body. The liquid cooling water machine is located outside the box body and provided with a liquid cooling pipeline connected with the liquid cooling plates of the battery clusters so as to be used for adjusting the temperature of the multiple battery clusters. According to the energy storage equipment disclosed by the utility model, the liquid cooling water machine is arranged outside the box body, so that the space in the box body can be saved, the number of battery clusters arranged in the box body can be increased, and the stored electric quantity of the energy storage equipment can be further improved; and meanwhile, the energy storage equipment can store more electric quantity, the cost of the energy storage equipment can be uniformly reduced, and the occupied area of the energy storage equipment can also be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to an energy storage device. Background Art

[0002] In the related technology, the maximum storage capacity of a 20-foot prefabricated energy storage warehouse is usually around 5Mwh. The average cost of the prefabricated energy storage warehouse system is too high, resulting in reduced product competitiveness. In addition, the battery cluster cooling water machine of the prefabricated energy storage warehouse system is usually integrated inside the prefabricated warehouse, resulting in a smaller available layout space for the battery cluster in the prefabricated energy storage warehouse, limiting the maximum storage capacity. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the utility model is to provide an energy storage device, in which a liquid chiller is arranged outside the box, which can save space inside the box, increase the number of battery clusters arranged inside the box, and thus increase the storage capacity of the energy storage device, while also reducing the cost of the energy storage device.

[0004] The energy storage device according to the embodiment of the utility model includes: a box body; a plurality of battery clusters, wherein the plurality of battery clusters are located in the box body; a liquid cooling water machine, wherein the liquid cooling water machine is located outside the box body, and the liquid cooling water machine has a liquid cooling pipeline connected to the liquid cooling plate of the battery cluster for adjusting the temperature of the plurality of battery clusters.

[0005] According to the energy storage device of the embodiment of the utility model, the liquid chiller is arranged outside the box, which can save space inside the box, which is conducive to increasing the number of battery clusters arranged in the box, and thus can increase the storage capacity of the energy storage device; at the same time, the energy storage device can store more power, the cost of the energy storage device will be evenly reduced, and the floor space of the energy storage device can also be reduced.

[0006] According to some embodiments of the present invention, a plurality of the liquid chillers are provided, and the plurality of the liquid chillers are arranged side by side along the width direction of the box body.

[0007] According to some embodiments of the utility model, the box body has a plurality of mounting racks arranged side by side, each of the mounting racks is provided with two mounting trays arranged side by side, and each of the mounting trays is installed with two battery clusters stacked in the up-and-down direction.

[0008] According to some embodiments of the utility model, the energy storage device also includes: a plurality of first PCS modules, a plurality of the battery clusters are connected to the first PCS modules one by one, the box has a first accommodating cavity, a plurality of the mounting frames are located in the first accommodating cavity, and a plurality of the first PCS modules are all located in the first accommodating cavity and above the mounting tray.

[0009] According to some embodiments of the utility model, the energy storage device also includes: a PCS cooling device and a first electrical device, the PCS cooling device is used to adjust the temperature of the first PCS module, multiple first PCS modules are electrically connected to the first electrical device, and a second accommodating cavity separated from the first accommodating cavity is also provided in the box body, and the first electrical device and the PCS cooling device are arranged side by side in the second accommodating cavity.

[0010] According to some embodiments of the utility model, the energy storage device also includes: a second electrical device and a third electrical device, wherein half of the battery cluster is electrically connected to the second electrical device, and the other half of the battery cluster is electrically connected to the third electrical device, and a first accommodating cavity and a second accommodating cavity separated from each other are provided in the box body, a plurality of the mounting frames are located in the first accommodating cavity, and the second electrical device and the third electrical device are arranged side by side in the second accommodating cavity.

[0011] According to some embodiments of the present utility model, the energy storage device further includes: a second PCS module, the second electrical device and the third electrical device are both electrically connected to the second PCS module, and the second PCS module is located outside the box.

[0012] According to some embodiments of the utility model, a switch door is provided on the box body of the energy storage device, and the switch door is used to close or open the first accommodating cavity.

[0013] According to some embodiments of the utility model, a plurality of switch doors are provided, and the plurality of switch doors are located on the same side of the box body, and each of the switch doors is arranged opposite to the mounting frame of each column.

[0014] According to some embodiments of the present invention, the thickness of the liquid chiller is d, which satisfies: 400mm≤d≤700mm.

[0015] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0017] Figure 1 is a stereoscopic diagram of an energy storage device according to some embodiments of the utility model;

[0018] Figure 2 yes Figure 1 The main view of the energy storage device;

[0019] Figure 3 is a top view of an energy storage device according to some embodiments of the utility model;

[0020] Figure 4 is a top view of an energy storage device according to other embodiments of the utility model;

[0021] Figure 5 is a schematic diagram of a battery cluster according to some embodiments of the present utility model;

[0022] Figure 6 yes Figure 5 A top view of the battery cluster;

[0023] Figure 7 yes Figure 5 Side view of the battery cluster;

[0024] Figure 8 It is a stereoscopic diagram of a battery cell according to some embodiments of the utility model.

[0025] Reference numerals:

[0026] 100. Energy storage equipment;

[0027] 10. Box; 11. First accommodating chamber; 111. Mounting frame; 112. Mounting tray; 113. First PCS module; 12. Second accommodating chamber; 121. First electrical equipment; 122. PCS cooling equipment; 123. Second electrical equipment; 124. Third electrical equipment; 125. Fire fighting equipment; 13. Door opening and closing;

[0028] 20. Battery cluster; 21. Battery cell;

[0029] 30. Liquid chiller. DETAILED DESCRIPTION

[0030] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0031] In the description of the present utility model, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0032] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0033] Reference below Figure 1-Figure 8 An energy storage device 100 according to an embodiment of the present invention is described.

[0034] According to the energy storage device 100 of the embodiment of the utility model, it includes a box body 10, multiple battery clusters 20 and a liquid chiller 30. The multiple battery clusters 20 are located in the box body 10. The battery cluster 20 includes at least one battery cell 21, that is, the battery cluster 20 may include one battery cell 21, or the battery cluster 20 may include multiple battery cells 21.

[0035] The liquid chiller 30 is located outside the housing 10, and the liquid chiller 30 has a liquid cooling pipeline, and the battery cluster 20 has a liquid cooling plate, and the liquid cooling pipeline is connected to the liquid cooling plate to adjust the temperature of the multiple battery clusters 20. The liquid chiller 30 can provide cooling liquid for the liquid cooling plate of the battery cluster 20, and the cooling liquid can flow in the condensing plate to dissipate heat or heat the battery cluster 20. For example, the battery cluster 20 includes at least one battery cell 21, and each battery cell 21 has a liquid cooling plate.

[0036] The liquid chiller 30 is located outside the housing 10, which can save space in the housing 10, so that the number of battery clusters 20 arranged in the housing 10 is increased, which is used to increase the storage capacity of the energy storage device 100. When the storage capacity of the energy storage device 100 is more, the cost of the energy storage device 100 will be evenly reduced, and for energy storage devices 100 with the same storage capacity, the energy storage device 100 of the present application will occupy less area.

[0037] For example, the liquid chiller 30 can be first assembled outside the box 10 and then transported as a whole with the energy storage device 100; the liquid chiller 30 and the box 10 can also be transported separately and then assembled outside the box 10 on site.

[0038] According to the energy storage device 100 of the embodiment of the utility model, the liquid chiller 30 is arranged outside the box body 10, which can save space in the box body 10, which is conducive to increasing the number of battery clusters 20 arranged in the box body 10, thereby increasing the storage capacity of the energy storage device 100; at the same time, the energy storage device 100 can store more electricity, and the cost of the energy storage device 100 will be evenly reduced, thereby reducing the cost of the energy storage device 100 and reducing the floor space of the energy storage device 100.

[0039] According to some embodiments of the present invention, referring to Figure 1-Figure 4 There are multiple liquid chillers 30, and the multiple liquid chillers 30 are arranged side by side along the width direction of the box body 10. The box body 10 has a large space in the width direction of the box body 10. The multiple liquid chillers 30 are arranged side by side on the outside of the box body 10 in the width direction. The liquid chillers 30 do not occupy the space in the length direction of the box body 10, and the floor space of the energy storage device 100 can be reduced.

[0040] As the amount of electricity stored in the energy storage device 100 increases, one liquid chiller 30 is insufficient to meet the heat dissipation or heating requirements of the battery cluster 20 , and two liquid chillers 30 can be used in combination without special development; and one or two liquid chillers 30 can be flexibly selected according to the cooling requirements of the 2h / 4h battery cluster 20 .

[0041] According to some embodiments of the present invention, referring to Figure 2 , Figure 5-Figure 7 The box body 10 has a plurality of mounting racks 111 arranged side by side, each mounting rack 111 is provided with two mounting trays 112 arranged side by side, each mounting tray 112 is installed with two battery clusters 20 stacked in the up-and-down direction, the battery cluster 20 is first placed in the mounting tray 112, and then the mounting tray 112 is placed in the mounting rack 111 of the box body 10, which can facilitate the arrangement of each battery cluster 20.

[0042] In a specific example, referring to Figure 2The box 10 has four side-by-side mounting racks 111, each mounting rack 111 has two side-by-side mounting trays 112, and each mounting tray 112 has ten 1P77S cells 21, wherein the top five cells 21 form a battery cluster 20, and the bottom five cells 21 form a battery cluster 20, that is, the box 10 has sixteen battery clusters 20. The capacity of one cell 21 is 350Ah, and the power of one battery cluster 20 is: 77*5*3.2*350=431.2Kwh, and the storage power of the energy storage device 100 is: 431.2Kwh*16=6.8992Mwh. The storage power of the energy storage device 100 can reach 6.8992Mwh. Compared with the traditional 5Mwh energy storage device 100, the storage power of the energy storage device 100 of the present application increases by 27.3%.

[0043] According to some embodiments of the present invention, referring to Figure 2-Figure 3 The energy storage device 100 further includes a plurality of first PCS modules 113, and a plurality of battery clusters 20 are connected to the first PCS modules 113 one by one, and one battery cluster 20 is connected to one first PCS module 113. When a battery cluster 20 or a first PCS module 113 fails, maintenance personnel can disconnect the failed battery cluster 20, and other battery clusters 20 without failure can be kept running, and the system online rate is high.

[0044] The box body 10 has a first accommodating cavity 11, and multiple mounting frames 111 are located in the first accommodating cavity 11, that is, the battery cluster 20 is located in the first accommodating cavity 11, and multiple first PCS modules 113 are all located in the first accommodating cavity 11 and above the mounting tray 112. There is a certain installation space above the mounting tray 112, and the multiple first PCS modules 113 are all located above the mounting tray 112, which can facilitate the arrangement of the multiple first PCS modules 113.

[0045] For example, the box 10 has sixteen battery clusters 20, and the first PCS modules 113 also have sixteen, and one battery cluster 20 is electrically connected to the first PCS module 113 one by one. Two first PCS modules 113 are arranged above each mounting tray 112, and the two first PCS modules 113 can be arranged side by side along the depth direction of the mounting tray 112.

[0046] For another example, the size (depth*width*height) of the battery cell 21 is: 500mm*215mm*26mm, the size (depth*width*height) of the installation tray 112 of the battery cluster 20 is: 2250mm*580mm*2625mm, the size (depth*length*height) of the box 10 is: 6058mm*2438mm*2896mm. After placing the installation tray 112 in the box 10, there is still a certain installation space above the installation tray 112, which can facilitate the installation of multiple first PCS modules 113.

[0047] According to some embodiments of the present invention, referring to Figure 3 The energy storage device 100 also includes a PCS cooling device 122 and a first electrical device 121. The PCS cooling device 122 is used to adjust the temperature of the first PCS module 113. Multiple first PCS modules 113 are electrically connected to the first electrical device 121 to achieve the integration of multiple battery clusters 20. When a battery cluster 20 is correspondingly connected to one of the first PCS modules 113, the working efficiency of the first PCS module 113 is less than or equal to 99%, and the remaining part will be consumed in the form of heat, which will generate a large amount of heat and need to be cooled, that is, the PCS cooling device 122 is designed to cool multiple first PCS modules 113. The PCS cooling device 122 and the first electrical device 121 are arranged on opposite sides of the length direction of the box 10 with the liquid chiller 30.

[0048] The box body 10 is also provided with a second accommodating chamber 12 separated from the first accommodating chamber 11, and the first electrical equipment 121 and the PCS cooling equipment 122 are arranged side by side in the second accommodating chamber 12, so that the battery cluster 20 is separated from the first electrical equipment 121 and the PCS cooling equipment 122, thereby avoiding interference between the battery cluster 20 and the first electrical equipment 121 and the PCS cooling equipment 122, and improving the safety of the energy storage device 100 during operation. For example, the first electrical equipment 121 is an AC combiner cabinet.

[0049] For example, the energy storage device 100 further includes a fire-fighting device 125 , and the fire-fighting device 125 may be located in the second accommodating cavity 12 .

[0050] According to some embodiments of the present invention, referring to Figure 4 The energy storage device 100 further includes a second electrical device 123 and a third electrical device 124, wherein half of the battery clusters 20 are electrically connected to the second electrical device 123, and the other half of the battery clusters 20 are electrically connected to the third electrical device 124. Half of the battery clusters 20 converge into one electrical device, and the inter-cluster circulation is small. The second electrical device 123 and the third electrical device 124 are arranged on opposite sides of the length direction of the box body 10 with the liquid chiller 30.

[0051] The box 10 is provided with a first accommodating chamber 11 and a second accommodating chamber 12 separated from each other, and a plurality of mounting frames 111 are located in the first accommodating chamber 11, that is, the battery cluster 20 is located in the first accommodating chamber 11, and the second electrical equipment 123 and the third electrical equipment 124 are arranged side by side in the second accommodating chamber 12. The battery cluster 20 is separated from the second electrical equipment 123 and the third electrical equipment 124, so that interference between the battery cluster 20 and the second electrical equipment 123 and the third electrical equipment 124 can be avoided, and the safety of the energy storage device 100 during operation can be improved. For example, the second electrical equipment 123 and the third electrical equipment 124 are both DC combiner cabinets.

[0052] In the above embodiment, the first electrical equipment 121 and the PCS cooling equipment 122 are arranged side by side in the second accommodating cavity 12. In this embodiment, the second electrical equipment 123 and the third electrical equipment 124 are arranged side by side in the second accommodating cavity 12. In the above embodiment, an electrical equipment area is omitted for arranging the PCS cooling equipment 122.

[0053] For example, the energy storage device 100 further includes a fire-fighting device 125 , and the fire-fighting device 125 may be located in the second accommodating cavity 12 .

[0054] According to some embodiments of the present invention, referring to Figure 4 The energy storage device 100 also includes a second PCS module, the second electrical device 123 and the third electrical device 124 are both electrically connected to the second PCS module, the second PCS module is located outside the box 10, and the second PCS module does not occupy the space inside the box 10, which can increase the layout space of the battery cluster 20 in the box 10.

[0055] For example, there are sixteen battery clusters 20 in the box 10, eight of which are electrically connected to the second electrical device 123, and the other eight are electrically connected to the third electrical device 124. The second electrical device 123 and the third electrical device 124 are both electrically connected to the second PCS module, realizing the integration of multiple battery clusters 20.

[0056] According to some embodiments of the present invention, referring to Figure 1-Figure 4 The energy storage device 100 has a switch door 13 on its housing 10. The switch door 13 is used to close or open the first accommodating chamber 11. When the switch door 13 is opened, the battery cluster 20 can be placed or removed. When the battery cluster 20 is placed or removed, the switch door 13 is closed.

[0057] According to some embodiments of the present invention, referring to Figure 1-Figure 4There are multiple switch doors 13, each of which is arranged opposite to each column of mounting racks 111. The box body 10 has a relatively large structure and is provided with multiple switch doors 13, which can facilitate the opening or closing of the switch doors 13. For example, the energy storage device 100 has four columns of mounting racks 111, and correspondingly, there can be four switch doors 13. Two mounting trays 112 are arranged in one column of mounting racks 111, and each switch door 13 opens the battery clusters 20 in two mounting trays 112.

[0058] The multiple switch doors 13 are all located on the same side of the box 10, and the boxes 10 of the two energy storage devices 100 can be arranged back to back, further reducing the footprint of the energy storage devices 100. For example, since the storage capacity of the energy storage devices 100 arranged back to back is greatly increased, the footprint of a 100Mwh power station can be further reduced by 20%.

[0059] According to some embodiments of the present invention, referring to Figure 1-Figure 2 , the thickness of the liquid chiller 30 is d, which satisfies: 400mm≤d≤700mm. For example, the thickness of the liquid chiller 30 may be 400mm, 440mm, 500mm, 550mm, 600mm, 650mm or 700mm, etc. When the thickness of the liquid chiller 30 is within this range, the floor space occupied by the liquid chiller 30 can be reduced, and thus the area occupied by the energy storage device 100 can be reduced.

[0060] In a specific example, the thickness of the liquid chiller 30 is 440 mm, the length of the box 10 is 6500 mm, and the floor area of ​​the energy storage device 100 is only increased by 6.8%. The storage capacity of the energy storage device 100 of this embodiment reaches 6.8992 Mwh. Compared with the traditional 5 Mwh energy storage device 100, the storage capacity of the energy storage device 100 of the present application is increased by 27.3%.

[0061] In the description of this specification, the description with reference to the terms "some embodiments", "optionally", "further" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0062] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. An energy storage device, characterized in that: include: Box; A plurality of battery clusters, wherein the plurality of battery clusters are located in the box; A liquid cooling water machine is located outside the box, and the liquid cooling water machine has a liquid cooling pipeline connected to the liquid cooling plate of the battery cluster to adjust the temperature of the plurality of battery clusters.

2. The energy storage device according to claim 1, characterized in that: There are multiple liquid cooling water machines, and the multiple liquid cooling water machines are arranged side by side along the width direction of the box body.

3. The energy storage device according to claim 1, characterized in that: The box body is provided with a plurality of mounting racks arranged side by side, each of the mounting racks is provided with two mounting trays arranged side by side, and each of the mounting trays is provided with two battery clusters stacked in an up-and-down direction.

4. The energy storage device according to claim 3, characterized in that: Also includes: Multiple first PCS modules, multiple battery clusters are connected to the first PCS modules one by one, the box has a first accommodating cavity, multiple mounting frames are located in the first accommodating cavity, and multiple first PCS modules are all located in the first accommodating cavity and above the mounting tray.

5. The energy storage device according to claim 4, characterized in that: Also includes: A PCS cooling device and a first electrical device, wherein the PCS cooling device is used to adjust the temperature of the first PCS module, and multiple first PCS modules are electrically connected to the first electrical device. A second accommodating cavity separated from the first accommodating cavity is also provided in the box body, and the first electrical device and the PCS cooling device are arranged side by side in the second accommodating cavity.

6. The energy storage device according to claim 3, characterized in that: Also includes: A second electrical device and a third electrical device, wherein half of the battery cluster is electrically connected to the second electrical device, and the other half of the battery cluster is electrically connected to the third electrical device, a first accommodating cavity and a second accommodating cavity separated from each other are provided in the box body, a plurality of the mounting frames are located in the first accommodating cavity, and the second electrical device and the third electrical device are arranged side by side in the second accommodating cavity.

7. The energy storage device according to claim 6, characterized in that: Also includes: The second PCS module, the second electrical device and the third electrical device are both electrically connected to the second PCS module, and the second PCS module is located outside the box.

8. The energy storage device according to claim 4 or 6, characterized in that: The box body is provided with a switch door, and the switch door is used to close or open the first accommodating cavity.

9. The energy storage device according to claim 8, characterized in that: There are multiple switch doors, and the multiple switch doors are all located on the same side of the box body. Each switch door is arranged opposite to the mounting frame of each column.

10. The energy storage device according to claim 2, characterized in that: The thickness of the liquid chiller is d, which satisfies: 400mm≤d≤700mm.

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