Energy storage device

Abstract

The utility model discloses an energy storage device which comprises a mounting rack and a plurality of battery clusters, and the mounting rack is provided with a plurality of spaced mounting spaces; the plurality of battery clusters are mounted in the plurality of mounting spaces in a one-to-one correspondence manner, each battery cluster comprises at least one battery module and a PCS module, and the battery modules are electrically connected to the PCS modules. According to the embodiment of the utility model, the energy storage equipment comprises a plurality of battery clusters, each battery cluster comprises at least one battery module and at least one PCS module, the battery modules are electrically connected with the PCS modules, on one hand, when the battery modules or the PCS modules in the battery clusters fail, maintenance personnel can disconnect the faulted battery clusters, and the maintenance personnel can disconnect the faulted battery clusters; other fault-free battery clusters can not stop, and the online rate of the system is high; and on the other hand, in later use, after the battery clusters are aged, only the corresponding battery clusters need to be replaced, so that the cost and time for replacing the battery clusters can be saved.

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 art, energy storage battery packs usually require multiple battery packs to be stacked to form a battery cluster with larger capacity. The multi-channel high-voltage DC power output by multiple battery packs needs to be aggregated to a junction cabinet and then connected to the PCS integrated cabinet outside the container. A single-point failure of the PCS will cause the entire energy storage battery system to shut down and the system online rate will be low. After the battery cluster ages, it cannot be matched with a new battery cluster and can only be replaced completely. The energy storage battery system is difficult to replace and the after-sales maintenance cost is extremely high. 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, each battery cluster includes a PCS module, when a battery module or a PCS module in a battery cluster fails, maintenance personnel can disconnect the failed battery cluster, and other battery clusters without failure can be kept running, and the system online rate is high; in later use, when the battery cluster is aged, only the corresponding battery cluster needs to be replaced, which can save the cost and time of replacing the battery cluster.

[0004] The energy storage device according to the embodiment of the utility model includes: a mounting frame, the mounting frame having a plurality of spaced-apart mounting spaces; a plurality of battery clusters, the plurality of battery clusters being mounted one-to-one in the plurality of mounting spaces, each of the battery clusters including at least one battery module and a PCS module, the battery module being electrically connected to the PCS module.

[0005] The energy storage device according to the embodiment of the utility model includes a plurality of battery clusters, each battery cluster includes at least one battery module and a PCS module, and the battery module is electrically connected to the PCS module. On the one hand, when a battery module or a PCS module in a battery cluster fails, maintenance personnel can disconnect the failed battery cluster, and other normal battery clusters can continue to operate, and the system online rate is high. On the other hand, in later use, after the battery cluster ages, only the corresponding battery cluster needs to be replaced, which can save the cost and time of replacing the battery cluster.

[0006] According to some embodiments of the present invention, the battery cluster includes a shell, and the battery module and the PCS module are both located in the shell.

[0007] According to some embodiments of the present invention, the housing includes a maintenance panel, the maintenance panel is arranged adjacent to the PCS module, a high-voltage interface is provided on the maintenance panel, and the high-voltage interface is connected to the PCS module.

[0008] According to some embodiments of the present invention, the energy storage device further includes: an AC busbar and a connecting line, wherein the connecting line is connected between the plurality of the high-voltage interfaces and the AC busbar, wherein the AC busbar is located above the plurality of the battery clusters.

[0009] According to some embodiments of the utility model, the energy storage device also includes a box body and an electrical device, the box body is provided with a first accommodating cavity and a second accommodating cavity separated from each other, the mounting frame is located in the first accommodating cavity, the electrical device is arranged in the second accommodating cavity, and the electrical device is connected to the AC busbar.

[0010] According to some embodiments of the utility model, the energy storage device also includes a liquid chiller. A third accommodating chamber is also provided in the box body. The third accommodating chamber and the second accommodating chamber are arranged side by side on the same side of the first accommodating chamber. The liquid chiller is arranged in the third accommodating chamber. The liquid chiller is used to adjust the temperature of the multiple battery clusters.

[0011] According to some embodiments of the present invention, the battery cluster includes a cold plate, and the maintenance panel is further provided with a liquid cooling joint, one end of the liquid cooling joint is connected to the cold plate, and the other end is connected to the liquid chiller.

[0012] According to some embodiments of the utility model, the box body is further provided with a switch door for closing or opening the first accommodating cavity, and the maintenance panel is located at the opening of the first accommodating cavity.

[0013] According to some embodiments of the utility model, a plurality of mounting racks are provided, a plurality of switch doors are provided, the number of switch doors is less than the number of mounting racks, and each switch door is opposite to at least two mounting racks.

[0014] According to some embodiments of the present invention, a plurality of the mounting racks are arranged in multiple rows and columns, and each of the switch doors is disposed opposite to the mounting racks in each column.

[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 front view of an energy storage device according to some embodiments of the utility model;

[0018] Figure 2 yes Figure 1A top view of the energy storage device in FIG.

[0019] Reference numerals:

[0020] 100. Energy storage equipment;

[0021] 10. Battery cluster; 1. Housing; 11. Maintenance panel; 111. High voltage interface; 112. Liquid cooling connector;

[0022] 21. AC busbar;

[0023] 30. Box body; 31. First accommodating chamber; 32. Second accommodating chamber; 33. Third accommodating chamber; 34. Mounting frame; 341. Mounting space; 35. Electrical equipment; 36. Liquid chiller; 37. Open / close door. DETAILED DESCRIPTION

[0024] 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.

[0025] 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.

[0026] 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.

[0027] Reference below Figure 1-Figure 2An energy storage device 100 according to an embodiment of the present invention is described.

[0028] The energy storage device 100 according to the embodiment of the utility model includes a mounting frame 34 and a plurality of battery clusters 10, the mounting frame 34 has a plurality of spaced-apart mounting spaces 341, and the plurality of battery clusters 10 are mounted in the plurality of mounting spaces 341 in a one-to-one correspondence. Each battery cluster 10 includes at least one battery module and a PCS module, each battery cluster 10 may include a battery module and a PCS module, and the battery module is electrically connected to the PCS module; each battery cluster 10 may include a plurality of battery modules and PCS modules, and the plurality of battery modules may be electrically connected to the PCS module. For example, the high-voltage DC total positive and high-voltage DC total negative of the battery module are directly connected to the high-voltage input port of the PCS module.

[0029] The PCS module and the battery module are integrated into a battery cluster 10 to achieve "one cluster one management". When the battery cluster 10 is charged and discharged, there is no inter-cluster circulation between multiple battery clusters 10. After multiple charges and discharges, the consistency of the battery cluster 10 is good. When a battery module or PCS module in the battery cluster 10 fails, the maintenance personnel can disconnect the failed battery cluster 10, and other fault-free battery clusters 10 can be kept running, and the system online rate is high. When the energy storage device 100 starts running, one of the battery clusters 10 can be adjusted, and the other battery clusters 10 can be copied. The debugging cycle is short, which can save operation and maintenance costs.

[0030] The energy storage device 100 includes a plurality of battery clusters 10. On the one hand, in actual use, any number of battery clusters 10 can be connected according to the required current. On the other hand, in later use, when the battery clusters 10 are aged, only the corresponding battery clusters 10 need to be replaced, which can save the cost and time of replacing the battery clusters 10.

[0031] For example, the width of the battery cluster 10 is about 1160 mm, the height of the battery cluster 10 is about 690 mm, and the depth of the battery cluster 10 is ≤ 2200 mm.

[0032] In a specific example, each battery cluster 10 has six 1P67S battery modules, the capacity of one battery module is 325Ah, the power of one battery cluster 10 is 402*3.2*325=418Kwh, the PCS module adopts a 1500V high-voltage system with a power of 215Kwh, and one battery cluster 10 can provide 2h of energy storage needs.

[0033] The energy storage device 100 according to the embodiment of the utility model includes a plurality of battery clusters 10, each battery cluster 10 includes at least one battery module and a PCS module, and the battery module is electrically connected to the PCS module. On the one hand, when a battery module or a PCS module in the battery cluster 10 fails, maintenance personnel can disconnect the failed battery cluster 10, and other normal battery clusters 10 can be kept running, and the system online rate is high; on the other hand, in later use, after the battery cluster 10 is aged, only the corresponding battery cluster 10 needs to be replaced, which can save the cost and time of replacing the battery cluster 10.

[0034] According to some embodiments of the present invention, referring to Figure 1-Figure 2 The battery cluster 10 includes a housing 1, and the battery module and the PCS module are both located in the housing 1. The housing 1 can be used to protect the battery module and the PCS module, and can prevent the battery module and the PCS module from being damaged by the external environment. For example, the battery module and the PCS module can be directly integrated into the same cavity of the housing 1, or can be located in two cavities of the housing 1 respectively.

[0035] According to some embodiments of the present invention, referring to Figure 1 The housing 1 includes a maintenance panel 11, which is disposed adjacent to the PCS module. A high-voltage interface 111 is disposed on the maintenance panel 11, which is connected to the PCS module. Each battery cluster 10 has a high-voltage interface 111, and the output end of the PCS module can be led out through the high-voltage interface 111. When the maintenance panel 11 is disassembled, the PCS module can be exposed, and the PCS module can be maintained or repaired. For example, three high-voltage interfaces 111 are provided, namely, UVW three-phase electrical interfaces, and the UVW three-phase electricity output by the PCS module is led out through the three high-voltage interfaces 111 on the maintenance panel 11.

[0036] According to some embodiments of the present invention, referring to Figure 1 The energy storage device 100 further includes an AC busbar 21 and a connecting wire, the connecting wire is connected between the multiple high-voltage interfaces 111 and the AC busbar 21, the high-voltage interface 111 of each battery cluster 10 can be connected to the AC busbar 21, and the multiple battery clusters 10 are connected in parallel on the AC busbar. For example, the connecting wire may include a UVW three-phase wire.

[0037] Among them, the AC busbar 21 is located above the battery cluster 10, which can reasonably utilize the space above the battery cluster 10; the battery cluster 10 is connected to the AC busbar 21 nearby, which can save the use of connecting wires on the one hand, and avoid the staggered arrangement of connecting wires on the other hand. When a problem occurs in the battery cluster 10, it is not necessary to use the battery cluster 10 to find the fault.

[0038] According to some embodiments of the present invention, referring to Figure 1-Figure 2The energy storage device 100 further includes a box body 30 and an electrical device 35. The box body 30 is provided with a first accommodating cavity 31 and a second accommodating cavity 32 which are separated from each other. The mounting frame 34 is located in the first accommodating cavity 31. The electrical device 35 is located in the second accommodating cavity 32. The battery cluster 10 and the electrical device 35 are separated from each other, so that interference between the battery cluster 10 and the electrical device 35 can be avoided, thereby improving the safety of the energy storage device 100 during operation.

[0039] The electrical device 35 is connected to the AC busbar 21. Each battery cluster 10 can be connected to the AC busbar 21 via a connecting line, and connected to the electrical device 35 via the AC busbar 21. The electrical device 35 can be connected to an electrical device to provide power for the electrical device.

[0040] A first accommodating cavity 31 is provided in the box body 30 , the battery cluster 10 is located in the first accommodating cavity 31 , and the PCS module is located in the battery cluster 10 . The PCS module no longer occupies additional space outside the box body 30 , thereby improving overall space utilization.

[0041] For example, the energy storage device 100 further includes fire-fighting equipment, which may be located in the second accommodating cavity 32 .

[0042] According to some embodiments of the present invention, referring to Figure 1-Figure 2 The energy storage device 100 further includes a liquid chiller 36. A third accommodating chamber 33 is further provided in the box body 30. The third accommodating chamber 33 and the second accommodating chamber 32 are arranged side by side on the same side of the first accommodating chamber 31, so that the space in the box body 30 can be reasonably utilized. The liquid chiller 36 is arranged in the third accommodating chamber 33. The liquid chiller 36 is used to adjust the temperature of the multiple battery clusters 10. The liquid chiller 36 can be connected to each battery cluster 10 through a pipeline. When the temperature of the battery cluster 10 is high, the liquid chiller 36 can provide cooling for the battery cluster 10 to reduce the temperature of the battery cluster 10; when the temperature of the battery cluster 10 is low, the liquid chiller 36 can provide heat for the battery cluster 10 to increase the temperature of the battery cluster 10, thereby increasing the service life of the battery cluster 10.

[0043] By separating the liquid chiller 36 , the electrical equipment 35 and the battery cluster 10 , interference between the liquid chiller 36 , the electrical equipment 35 and the battery cluster 10 can be avoided, thereby improving the safety of the energy storage device 100 during operation.

[0044] According to some embodiments of the present invention, referring to Figure 1-Figure 2 The battery cluster 10 includes a cold plate, and a liquid cooling joint 112 is also provided on the maintenance panel 11. One end of the liquid cooling joint 112 is connected to the cold plate, and the other end of the liquid cooling joint 112 is connected to the liquid chiller 36. The liquid chiller 36 and the liquid cooling joint 112 are connected by a pipeline, and the liquid of the liquid chiller 36 is transmitted to the cold plate. The cold plate is used to adjust the temperature of the battery module.

[0045] According to some embodiments of the present invention, referring to Figure 1-Figure 2 The box body 30 is also provided with a switch door 37 for closing or opening the first accommodating chamber 31 and the maintenance panel 11. When the switch door 37 is opened, the maintenance panel 11 can be exposed, and the liquid cooling joint 112 and the high-voltage interface 111 on the maintenance panel 11 can be repaired, which can facilitate later inspection and maintenance. When the switch door 37 is opened, the battery cluster 10 can be removed from the first accommodating chamber 31, and the battery cluster 10 can be inspected.

[0046] According to some embodiments of the present invention, referring to Figure 1-Figure 2 There are multiple mounting frames 34 and multiple switch doors 37. The number of switch doors 37 is less than the number of mounting frames 34. Each switch door 37 is opposite to at least two mounting frames 34. The box body 30 has a larger structure and is provided with multiple switch doors 37, which can facilitate the opening or closing of the switch doors 37.

[0047] According to some embodiments of the present invention, referring to Figure 1-Figure 2 , multiple mounting racks 34 are arranged in multiple rows and columns. The mounting racks 34 are used to place battery clusters 10. The arrangement of the mounting racks 34 can be adjusted according to actual needs. Each switch door 37 is arranged opposite to each column of battery clusters 10. The box body 30 has a large structure and is provided with multiple switch doors 37, which can facilitate the opening or closing of the switch doors 37; when a switch door 37 is opened, the battery clusters 10 in one column can be exposed, which can facilitate the repair or maintenance of the battery clusters 10 in one column. For example, the energy storage device 100 has four columns of battery clusters 10, and correspondingly, four switch doors 37 can be provided.

[0048] In a specific example, referring to Figure 1 The mounting racks 34 can be arranged in three rows and four columns, with three battery clusters 10 arranged in each column in the height direction and four battery clusters 10 arranged in each row in the length direction, for a total of 12 battery clusters 10. Each battery cluster 10 has six 1P67S battery modules, one battery cluster 10 is 1P402S, and the capacity of one battery module is 325Ah. The power of the 12 battery clusters 10 is 402*3.2*325*12=5.01Mwh, and the energy storage device 100 of the present application can store 5Mwh of power.

[0049] 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.

[0050] 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: a mounting frame having a plurality of spaced-apart mounting spaces; A plurality of battery clusters, wherein the plurality of battery clusters are installed in the plurality of installation spaces in a one-to-one correspondence, each of the battery clusters comprises at least one battery module and a PCS module, and the battery module is electrically connected to the PCS module; The battery cluster includes a shell, the battery module and the PCS module are both located in the shell, the shell includes a maintenance panel, the maintenance panel is arranged adjacent to the PCS module, a high-voltage interface is provided on the maintenance panel, and the high-voltage interface is connected to the PCS module.

2. The energy storage device according to claim 1, characterized in that: Also includes: An AC busbar and a connecting line, wherein the connecting line is connected between the plurality of the high voltage interfaces and the AC busbar, wherein the AC busbar is located above the plurality of the battery clusters.

3. The energy storage device according to claim 2, characterized in that: It also includes a box body and electrical equipment, wherein the box body is provided with a first accommodating cavity and a second accommodating cavity separated from each other, the mounting frame is located in the first accommodating cavity, the electrical equipment is arranged in the second accommodating cavity, and the electrical equipment is connected to the AC busbar.

4. The energy storage device according to claim 3, characterized in that: It also includes a liquid cooling water machine. The box body is also provided with a third accommodating chamber. The third accommodating chamber and the second accommodating chamber are arranged side by side on the same side of the first accommodating chamber. The liquid cooling water machine is arranged in the third accommodating chamber. The liquid cooling water machine is used to adjust the temperature of the multiple battery clusters.

5. The energy storage device according to claim 4, characterized in that: The battery cluster includes a cold plate, and the maintenance panel is also provided with a liquid cooling joint, one end of the liquid cooling joint is connected to the cold plate, and the other end is connected to the liquid cooling machine.

6. The energy storage device according to claim 3, characterized in that: The box body is also provided with a switch door for closing or opening the first accommodating cavity, and the maintenance panel is located at the opening of the first accommodating cavity.

7. The energy storage device according to claim 6, characterized in that: There are a plurality of the mounting frames, and a plurality of the switch doors, the number of the switch doors is less than the number of the mounting frames, and each of the switch doors is opposite to at least two of the mounting frames.

8. The energy storage device according to claim 7, characterized in that: The plurality of mounting racks are arranged in a plurality of rows and columns, and each of the switch doors is disposed opposite to the mounting rack in each column.

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