Energy storage device

Abstract

The utility model relates to the technical field of energy storage equipment, in particular to an energy storage device which comprises a cabinet body and a plurality of battery packs. Wherein the plurality of battery packs are all arranged in the cabinet body, and the plurality of battery packs are arranged in parallel; any battery pack comprises a plurality of battery modules which are connected in series, and any battery module comprises a plurality of soft package battery cells. Therefore, in the energy storage device provided by the invention, a square aluminum shell battery cell in the existing battery pack is replaced by the soft package battery cell, the soft package battery cell occupies a small space, and can realize higher energy density than the square aluminum shell battery cell in the same space, so that the nominal voltage of a single battery pack can reach higher, for example, 768V, and the nominal voltage of the battery pack can reach 768V. And then a plurality of battery packs are placed in the energy storage cabinet in a parallel connection manner, so that the whole system is not influenced even if a single battery pack is abnormal in the subsequent use process, and can continue to operate, thereby ensuring benefits.

Description

Technical Field

[0001] This application relates to the technical field of energy storage devices, and particularly to an energy storage device. Background Art

[0002] Most of the battery packs currently on the market use aluminum-shell energy storage battery cells. Multiple such battery packs are connected in series to form a cluster, and then placed in an energy storage cabinet. The disadvantage of this battery pack connection method is that the nominal voltage of a single pack is low, and multiple packs need to be connected in series to assemble the entire energy storage system. Moreover, if a single battery pack fails in the entire energy storage system, it will cause the entire energy storage system to break down. Utility Model Content

[0003] The purpose of this application is to provide an energy storage device, which to a certain extent solves the technical problems existing in the prior art that aluminum-shell energy storage battery cells are grouped into battery packs, and multiple battery packs are connected in series and then put into the cabinet to form an energy storage cabinet. The nominal voltage of a single pack in this structure is low, and multiple packs need to be connected in series to assemble the entire energy storage system. Moreover, if a single battery pack fails in the entire energy storage system, it will cause the entire energy storage system to break down.

[0004] This application provides an energy storage device, including: a cabinet body and multiple battery packs; wherein, the multiple battery packs are all arranged in the cabinet body, and the multiple battery packs are arranged in parallel; any one of the battery packs includes multiple battery modules connected in series, and any one of the battery modules includes multiple soft-pack battery cells.

[0005] In the above technical solution, further, the number of the battery modules is an even number and is arranged in a square array.

[0006] In any of the above technical solutions, further, any one of the battery packs includes an electrical component panel, and the electrical component panel is arranged at one end of the battery module assembly formed by the multiple battery modules along its length direction; the electrical component panel is in an L shape.

[0007] In any of the above technical solutions, further, any one of the battery packs includes a BMU management module, and the BMU management modules are arranged at both ends of the battery module assembly along its length direction, and the BMU management module near the electrical component panel end is fixed on the side of the electrical component panel close to the battery module assembly.

[0008] In any of the above technical solutions, further, the electrical component panel is provided with a first wire harness fixing buckle.

[0009] In any of the above technical solutions, further, any of the battery packs further includes a liquid cooling plate and a support beam; wherein, the liquid cooling plate is disposed at the bottom of the battery module assembly formed by a plurality of the battery modules, and a plurality of the support beams support the bottom of the liquid cooling plate.

[0010] In any of the above technical solutions, further, any of the battery packs further includes a support member, and the support member is welded to the upper surface of the liquid cooling plate; each of the battery modules is provided with the support member, and the two are connected by bolts.

[0011] In any of the above technical solutions, further, any of the battery packs further includes a box cover, the box cover is buckled outside a plurality of the battery modules, and is connected to the liquid cooling plate; the top of the box cover is an inwardly concave spire structure.

[0012] In any of the above technical solutions, further, the top of the box cover includes a first cover part, a second cover part, a third cover part and a fourth cover part which are arranged obliquely downward; wherein, the second cover part and the third cover part are respectively arranged on both sides of the first cover part, and the second cover part and the third cover part are butted together;

[0013] The fourth cover part and the first cover part are sequentially arranged at intervals along the length direction of the battery module assembly; the second cover part and the third cover part are respectively arranged on both sides of the fourth cover part.

[0014] In any of the above technical solutions, further, each of the battery modules includes multiple columns of soft-pack battery cells, and the soft-pack battery cells in each column are connected in series, each column of soft-pack battery cells includes a plurality of the soft-pack battery cells, and every n of the plurality of soft-pack battery cells are taken as a group, and the soft-pack battery cells in each group are connected in series, and the n soft-pack battery cells in each group are connected in parallel, wherein, n is a positive integer greater than or equal to 2.

[0015] In any of the above technical solutions, further, a hollow insulating plate is disposed between any two adjacent soft-pack battery cells.

[0016] In any of the above technical solutions, further, the battery module further includes a U-shaped support plate, an inner insulating plate, an end plate, a top insulating plate and a pressing strip; wherein, the U-shaped support plate supports the bottom and the side of the soft-pack battery cell assembly formed by a plurality of the soft-pack battery cells, and the inner insulating plate is disposed between the U-shaped support plate and the soft-pack battery cell assembly;

[0017] There are two end plates, which are respectively arranged at both ends of the soft-pack battery cell assembly formed by a plurality of the soft-pack battery cells along the length direction of the U-shaped support plate, and the two end plates are respectively connected to the U-shaped support plate; the top insulating plate is pressed on the top of the soft-pack battery cell assembly by the pressing strip, and the pressing strip and the top insulating plate are connected to the U-shaped support plate through the same fixed points, and the pressing strip and the top insulating plate are connected to the end plates through the same fixed points.

[0018] In any of the above technical solutions, further, the top insulating plate is provided with a through opening.

[0019] In any of the above technical solutions, further, the end plate is provided with a second wire harness fixing buckle.

[0020] In any of the above technical solutions, further, the soft-pack battery cell assembly is connected to the U-shaped support plate through a thermally conductive structural adhesive.

[0021] In any of the above technical solutions, further, the battery module further includes foam, and the foam is respectively arranged between the two end plates and the soft-pack battery cell assembly.

[0022] In any of the above technical solutions, further, the battery module further includes a PCB circuit board, a temperature probe, a bus bar, a cell insulating bracket, and a hollow insulating plate; wherein, the PCB circuit board is arranged between the top of the soft-pack battery cell assembly and the top insulating plate; the temperature probe is arranged on the PCB circuit board, and the temperature probe is used to detect the temperature of the soft-pack battery cell; the cell insulating bracket is arranged between the top of the soft-pack battery cell assembly and the PCB circuit board, and the tab of the soft-pack battery cell passes through the cell insulating bracket and is connected to the PCB circuit board by welding; the hollow insulating plate is arranged inside the battery module and supports below the cell insulating bracket; all the soft-pack battery cells are connected in series and / or in parallel through a plurality of the bus bars.

[0023] Compared with the prior art, the beneficial effects of the present application are as follows:

[0024] In the energy storage device provided by the present application, the square aluminum shell battery cells in the existing battery pack are replaced with soft-pack battery cells. The soft-pack battery cells occupy less space. In the same space, a higher energy density can be achieved compared with the square aluminum shell battery cells. Therefore, the nominal voltage of a single battery pack can reach a relatively high value, such as 768V. Then, a plurality of battery packs are placed in the energy storage cabinet in a parallel connection manner. In this way, even if an individual battery pack is abnormal during subsequent use, the overall system is still not affected and can continue to operate, ensuring the benefits. Description of the Drawings

[0025] To more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0026] Figure 1 Explosion diagram of the battery module provided by the embodiment of the present application;

[0027] Figure 2 Assembly diagram of the battery module provided by the embodiment of the present application;

[0028] Figure 3 Another assembly diagram of the battery module provided by the embodiment of the present application;

[0029] Figure 4 Schematic structural diagram of the battery pack after opening the box cover provided by the embodiment of the present application;

[0030] Figure 5 Schematic structural diagram of the battery pack provided by the embodiment of the present application;

[0031] Figure 6 Another schematic structural diagram of the battery pack provided by the embodiment of the present application;

[0032] Figure 7 Schematic structural diagram of the BMU management module provided by the embodiment of the present application;

[0033] Figure 8 Another schematic structural diagram of the BMU management module provided by the embodiment of the present application.

[0034] Reference numerals:

[0035] 1 - Battery pack, 11 - Battery module, 111 - Soft-pack battery cell, 112 - U-shaped support plate, 113 - Foam, 114 - End plate, 115 - Top insulation plate, 1151 - Through hole, 116 - Pressure strip, 118 - PCB circuit board, 119 - Bus bar, 120 - Cell insulation bracket, 121 - Connection row, 122 - Insulation seat, 123 - Bolt, 12 - Electrical component panel, 13 - BMU management module, 14 - Box cover, 141 - First capping part, 142 - Second capping part, 143 - Third capping part, 144 - Fourth capping part, 15 - Liquid cooling plate, 16 - Support beam. Specific embodiments

[0036] The following will clearly and completely describe the technical solutions of the present application in conjunction with the drawings. Obviously, the described embodiments are some embodiments of the present application, rather than all embodiments.

[0037] The components of the embodiments of the present application that are generally described and shown in the accompanying drawings herein may be arranged and designed in a variety of different configurations. Accordingly, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the claimed present application, but is merely representative of selected embodiments of the present application.

[0038] All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts shall fall within the scope of protection of the present application.

[0039] In the description of the present application, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present application. In addition, the terms "first", "second", "third" are only used for descriptive purposes and should not be construed as indicating or implying relative importance.

[0040] In the description of the present application, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "connected", "coupled" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0041] Reference will be made below Figures 1 to 8 to describe an energy storage device according to some embodiments of the present application.

[0042] Referring to Figures 1 to 6 as shown, embodiments of the present application provide an energy storage device, including: a cabinet body and a plurality of battery packs 1; wherein, the plurality of battery packs 1 are all arranged in the cabinet body, and the plurality of battery packs 1 are arranged in parallel; any one of the battery packs 1 includes a plurality of serially arranged battery modules 11, and any one of the battery modules 11 includes a plurality of soft-pack battery cells 111.

[0043] According to the structure described above, the square aluminum shell battery cells in the existing battery pack 1 are replaced with soft-pack battery cells 111. The soft-pack battery cells 111 occupy less space. In the same space, compared with the square aluminum shell battery cells, a higher energy density can be achieved. Therefore, the nominal voltage of a single battery pack 1 can reach a relatively high value, such as 768V. Then, multiple battery packs 1 are placed in the energy storage cabinet in a parallel connection manner. In this way, even if a single battery pack 1 malfunctions during subsequent use, the overall system will not be affected and can continue to operate, ensuring the benefits.

[0044] In this embodiment, preferably, as Figure 4 shown, the number of battery modules 11 is an even number and is arranged in a square array.

[0045] According to the structure described above, arranging an even number of battery modules 11 in a square array makes the whole more regular, facilitating the arrangement of other components and the design of the cabinet body of the supporting energy storage cabinet.

[0046] It should be noted that: the arrangement of an even number of battery modules 11 is not limited to the square array arrangement, and they can also be arranged in a straight line in sequence along a specified direction.

[0047] In addition, the number of battery modules 11 is not limited to an even number, and it can also be an odd number. Especially when the number of battery modules 11 is an odd number, an even number of battery modules 11 among them can be arranged in a square array, and the remaining module is placed at one end of the length direction of the square array. And a battery management system is installed on the side of the remaining module to make full use of the space. Or all the odd-numbered battery modules 11 are arranged in a straight line in sequence along a specified direction. Of course, it is not limited to this, and specific selection is made according to actual needs, etc.

[0048] In this embodiment, preferably, as Figures 1 to 3 shown, any battery pack 1 includes an electrical component panel 12, and the electrical component panel 12 is arranged at one end of the battery module assembly formed by a plurality of battery modules 11 along its length direction; the electrical component panel 12 is L-shaped.

[0049] According to the structure described above, the L-shaped electrical component panel 12 has two mounting surfaces, a horizontal surface and a vertical surface, on which more electrical components can be installed, with a higher integration degree and facilitating later maintenance.

[0050] Furthermore, preferably, the L-shaped electrical panel can integrate the BMU management module 13, BCU management module, that is, the battery cell management module, fuse, Hall sensor, main positive / main negative relay, pre-charge resistor, and pre-charge relay, etc. described below. Of course, it is not limited to this, and it can also be designed according to actual needs.

[0051] In this embodiment, preferably, as Figure 3 、Figure 4 , Figure 7 and Figure 8 As shown in Figure 8 and

[0052] , any battery pack 1 includes a BMU management module 13, that is, a battery management module. BMU management modules 13 are provided at both ends of the battery module assembly along its length direction, and the BMU management module 13 near one end of the electrical component panel 12 is fixed to the side of the electrical component panel 12 close to the battery module assembly.

[0052] According to the above-described structure, BMU management modules 13 are respectively installed at the front end and the rear end of the battery module assembly, which facilitates collecting voltage signals nearby.

[0053] In this embodiment, preferably, the electrical component panel 12 is provided with a first wire harness fixing buckle (not shown in the figure), and the wire harness can be fixed by using the first wire harness fixing buckle, making the wire harness more regular and not easily chaotic.

[0054] Furthermore, preferably, the number of the first wire harness fixing buckles can be multiple, and their positions are designed according to actual needs.

[0055] In this embodiment, preferably, as Figure 4 and Figure 6 shown, any battery pack 1 further includes a liquid cooling plate 15 and a support beam 16; wherein, the liquid cooling plate 15 is disposed at the bottom of the battery module assembly formed by a plurality of battery modules 11, and a plurality of support beams 16 support the bottom of the liquid cooling plate 15.

[0056] According to the above-described structure, the liquid cooling plate 15 plays a role in cooling the battery module 11, thereby ensuring the performance of the battery module 11. The support beam 16 supports below the liquid cooling plate 15, enhancing the overall load-bearing capacity and strength of the liquid cooling plate 15.

[0057] Furthermore, preferably, the support beam 16 is welded to the bottom wall, or the support beam 16 and the bottom plate of the box body are of an integral structure.

[0058] Furthermore, preferably, the liquid cooling plate 15 and the support beam 16 can be connected by bolts, welding, or gluing, etc.

[0059] In this embodiment, preferably, any battery pack 1 further includes a support member (not shown in the figure), and the support member is welded to the upper surface of the liquid cooling plate 15; each battery module 11 is provided with a support member, and the two are connected by bolts.

[0060] According to the above-described structure, the support member has sufficient strength, which provides an installation position for the installation bolts, making the fixing effect of the battery module 11 better.

[0061] Further, preferably, the end plate 114 of the battery module 11 is connected to the support member by bolts.

[0062] Further, preferably, the support member can be a beam with a hollow interior or a block, and the number of support members is multiple. Each battery module 11 is provided with multiple blocks, and the multiple blocks are sequentially arranged at intervals along the length and width directions of the battery module 11.

[0063] In this embodiment, preferably, as Figure 5 shown, any one battery pack 1 further includes a case cover 14, the case cover 14 is buckled outside the multiple battery modules 11 and is connected to the liquid cooling plate 15; the top of the case cover 14 is an inwardly concave spire structure.

[0064] According to the structure described above, the top of the box body, that is, the top cover, adopts an inwardly concave spire structure, that is, an anti-deformation design, which can effectively prevent the middle area of the cover from sinking and deforming due to the relatively thin wall thickness and large length-width ratio of the cover, accidentally touching the internal voltage acquisition wire harness, and bringing potential failure risks. That is to say, the safety and reliability of the battery pack 1 are improved.

[0065] In this embodiment, preferably, as Figure 5 shown, the top of the case cover 14 includes a first cover part 141, a second cover part 142, a third cover part 143, and a fourth cover part 144 that are inclined downward; wherein, the second cover part 142 and the third cover part 143 are respectively arranged on both sides of the first cover part 141, and the second cover part 142 and the third cover part 143 are butted together;

[0066] The fourth cover part 144 and the first cover part 141 are sequentially arranged at intervals along the length direction of the battery module assembly; the second cover part 142 and the third cover part 143 are respectively arranged on both sides of the fourth cover part 144.

[0067] According to the structure described above, the above-mentioned first cover part 141, second cover part 142, third cover part 143, and fourth cover part 144, that is, the four cover parts, form an inwardly concave and X-shaped anti-deformation design structure. Of course, the structure of the top of the box body is not limited to the above, and can also be designed according to actual needs.

[0068] In this embodiment, preferably, as Figures 1 to 3 shown, the battery module 11 further includes a U-shaped support plate 112, an inner insulating plate, an end plate 114, a top insulating plate 115, and a pressing strip 116; wherein, the U-shaped support plate 112 supports the bottom and side parts of the soft-pack battery cell assembly formed by multiple soft-pack battery cells 111, and an inner insulating plate is arranged between the U-shaped support plate 112 and the soft-pack battery cell assembly;

[0069] There are two end plates 114, which are respectively arranged at both ends of the pouch cell assembly formed by a plurality of pouch cells 111 along the length direction of the U-shaped support plate 112, and the two end plates 114 are respectively connected to the U-shaped support plate 112; the top insulating plate 115 is pressed on the top of the pouch cell assembly by the pressing strip 116, and the pressing strip 116 and the top insulating plate 115 are connected to the U-shaped support plate 112 at the same fixed points, and the pressing strip 116 and the top insulating plate 115 are connected to the end plates 114 at the same fixed points.

[0070] According to the structure described above, it can be seen that the U-shaped support plate 112 wraps and supports both sides and the bottom of the pouch cell assembly along its width direction, playing a role in fixing the pouch cell assembly, and an inner insulating plate is arranged between the U-shaped support plate 112 and the pouch cell assembly, playing a role in insulation protection; two end plates 114 are designed at both ends of the pouch cell 111, playing a role in fixing both ends of the pouch cell assembly; a top insulating plate 115 is designed on the top of the pouch cell assembly, playing a role in further reinforcement, and also playing a role in insulation protection, and the top insulating plate 115 is pressed by fastening members such as the pressing strip 116 and bolts.

[0071] Further, preferably, both the inner insulating plate and the top insulating plate 115 can be made of epoxy boards. Of course, it is not limited to this, and other materials can also be selected according to actual needs.

[0072] Further, preferably, a PC insulating sheet can also be arranged between the side of the pouch cell assembly and the inner insulating plate to further improve the insulation effect.

[0073] Further, preferably, an insulating tape is pasted on the side of the end plate 114 close to the pouch cell assembly to further improve the insulation effect.

[0074] Further, preferably, the two end plates 114 and the U-shaped support plate 112 can be connected by bolts, welding, gluing or buckles.

[0075] Further, preferably, the top insulating plate 115 and the two end plates 114 as well as the U-shaped support plate 112 can be connected by bolts, welding, gluing or buckles.

[0076] In this embodiment, preferably, as Figure 2 shown, the top insulating plate 115 is provided with a through opening 1151, and this through opening 1151 can avoid the voltage acquisition plug-in.

[0077] Further, preferably, the number of the through openings 1151 can be multiple. Of course, it is not limited to this.

[0078] In this embodiment, preferably, the end plate 114 is provided with a second wire harness fixing buckle (not shown in the figure), and the wire harness can be fixed by using the second wire harness fixing buckle, so that the wire harness is more regular and not easily confused.

[0079] Furthermore, preferably, the number of the second wire harness fixing buckles can be multiple, and their positions can be designed according to actual needs.

[0080] In this embodiment, preferably, the soft-pack battery cell assembly and the U-shaped support plate 112 are connected by a thermally conductive structural adhesive.

[0081] According to the structure described above, the thermally conductive structural adhesive plays a role in heat conduction, and can ensure the heat dissipation performance during the operation of the battery pack 1.

[0082] In this embodiment, preferably, as Figure 1 shown, the battery module 11 further includes a foam 113, and the foam 113 is respectively arranged between the two end plates 114 and the soft-pack battery cell assembly.

[0083] According to the structure described above, during the subsequent operation of the battery module 11, the foam 113 has a certain pre-tightening force and buffer space, and the foam 113 also plays a role in insulation protection.

[0084] In this embodiment, preferably, as Figure 1 shown, the battery module 11 further includes a PCB circuit board 118, a temperature probe, a cell insulation bracket 120, and a hollow insulation board; wherein, the PCB circuit board 118 is arranged between the top of the soft-pack battery cell assembly and the top insulation board 115; the temperature probe is arranged on the PCB circuit board 118, and the temperature probe is used to detect the temperature of the soft-pack battery cell 111; the cell insulation bracket 120 is arranged between the top of the soft-pack battery cell assembly and the PCB circuit board 118, and the tab of the soft-pack battery cell 111 passes through the cell insulation bracket 120 and is connected to the PCB circuit board 118 by welding; the hollow insulation board is arranged inside the battery module 11 and supports below the cell insulation bracket 20, and the hollow insulation board plays a role in supporting the cell insulation bracket 120, and further plays a role in stably supporting the PCB circuit board at the top of the cell insulation bracket 120, ensuring the flatness of the PCB circuit board, and further ensuring the welding effect; all the soft-pack battery cells 111 are connected in series and / or in parallel together by a plurality of busbars 119, and are specifically selected according to actual needs.

[0085] According to the structure described above, the temperature probes distributed on the PCB board can monitor the temperature of each soft-pack battery cell 111 in the battery module 11 at all times. Furthermore, preferably, one probe can be provided for each soft-pack battery cell 111, or one probe can be provided for every two soft-pack battery cells 111, etc.

[0086] Furthermore, preferably, during the stacking process of the soft-pack battery cells 111, the hollow insulating plate is clamped by two columns of soft-pack battery cells and can also be connected to the bottom plate of the cabinet through structural adhesive to play a reinforcing role. In this embodiment, preferably, a hollow insulating plate (not shown in the figure) is provided between any two adjacent soft-pack battery cells 111, which serves to support the cell insulating bracket 120 and isolate the soft-pack battery cells 111 on both sides, thereby improving the yield rate of laser welding and the insulation performance of the battery module 11.

[0087] In this embodiment, preferably, each battery module 11 includes multiple columns of soft-pack battery cells, and the soft-pack battery cells in each column are connected in series. Each column of soft-pack battery cells includes multiple soft-pack battery cells 111. Every n soft-pack battery cells 111 among the multiple soft-pack battery cells 111 are taken as a group, and the soft-pack battery cells in each group are connected in series, while the n soft-pack battery cells 111 within each group are connected in parallel, where n is a positive integer greater than or equal to 2.

[0088] According to the structure described above, when the multiple soft-pack battery cells 111 within a group are connected in parallel, it is to increase the capacity, and when the groups are connected in series, it is regarded as increasing the voltage. It can be seen that both the voltage and capacity of the battery module 11 have been greatly improved.

[0089] Furthermore, preferably, each battery module 11 includes two columns of soft-pack battery cells, each column of soft-pack battery cells includes 30 groups of soft-pack battery cells, and each group includes 2 soft-pack battery cells 111.

[0090] Furthermore, preferably, a foam is provided between two adjacent soft-pack battery cells 111 in each column of soft-pack battery cells, and a PET film, i.e., polyethylene terephthalate film, is provided on the large surface side of the battery cell, which is the large surface formed by its long side and high side. Further, preferably, two adjacent columns of soft-pack battery cells can be connected in series through a connection row 121, and this connection row 121 is provided with an insulating seat 122. The connection row 121, the insulating seat 122, and the end plate 114 are connected by bolts, and the insulating seat 122 is arranged between the connection row 121 and the end plate 114.

[0091] It should be noted that: each battery module 11 is not limited to including two columns of soft-pack battery cells, and may also include one column or more than two columns of soft-pack battery cells, such as three columns, four columns, five columns, or six columns, etc.

[0092] In addition, each column of soft-pack battery cells is not limited to including 30 groups of soft-pack battery cells, and may also be less than 30 groups, such as 20 groups, 25 groups, or more than 30 groups, such as 35 groups, 40 groups, 42 groups, or 50 groups, etc.;

[0093] In addition, the number of soft-pack battery cells 111 in each group is not limited to 2, and may also be more than 2, such as 3, 4, or 5, etc.

[0094] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. An energy storage device, characterized in that, Comprising: A cabinet body and a plurality of battery packs; wherein, the plurality of battery packs are all arranged in the cabinet body, and the plurality of battery packs are arranged in parallel; any one of the battery packs includes a plurality of battery modules arranged in series, and any one of the battery modules includes a plurality of soft-pack battery cells.

2. The energy storage device according to claim 1, wherein The number of the battery modules is an even number and is arranged in a square array.

3. The energy storage device according to claim 2, characterized in that, Any one of the battery packs includes an electrical component panel, and the electrical component panel is arranged at one end of the battery module assembly formed by the plurality of battery modules along its length direction; the electrical component panel is L-shaped.

4. The energy storage device according to claim 3, wherein, Any one of the battery packs includes a BMU management module, and the BMU management modules are arranged at both ends of the battery module assembly along its length direction, and the BMU management module near the electrical component panel end is fixed on the side of the electrical component panel close to the battery module assembly; and / or The electrical component panel is provided with a first wire harness fixing buckle.

5. The energy storage device according to claim 1, characterized in that, Any one of the battery packs further includes a liquid cooling plate and a support beam; wherein, the liquid cooling plate is arranged at the bottom of the battery module assembly formed by the plurality of battery modules, and a plurality of the support beams support the bottom of the liquid cooling plate.

6. The energy storage device according to claim 5, wherein, Any one of the battery packs further includes a support member, and the support member is welded on the upper surface of the liquid cooling plate; any one of the battery modules is provided with the support member, and the two are connected by bolts.

7. The energy storage device according to claim 5, characterized in that, Any one of the battery packs further includes a box cover, the box cover is buckled outside the plurality of battery modules and is connected to the liquid cooling plate; the top of the box cover is an inward concave spire structure.

8. The energy storage device according to claim 7, characterized in that The top of the box cover includes a first cover part, a second cover part, a third cover part and a fourth cover part which are arranged obliquely downward; wherein, the second cover part and the third cover part are respectively arranged on both sides of the first cover part, and the second cover part and the third cover part are butted together; The fourth cover part and the first cover part are sequentially arranged at intervals along the length direction of the battery module assembly; the second cover part and the third cover part are respectively arranged on both sides of the fourth cover part.

9. The energy storage device according to claim 1, wherein Any one of the battery modules includes multiple columns of soft-pack battery cells, and the soft-pack battery cells between each column are arranged in series. Each column of soft-pack battery cells includes a plurality of the soft-pack battery cells. Every n of the plurality of soft-pack battery cells are taken as a group, and the soft-pack battery cells in each group are arranged in series, and the n soft-pack battery cells in each group are arranged in parallel, wherein, n is a positive integer greater than or equal to 2.

10. The energy storage device according to any one of claims 1 to 9, characterized in that, The battery module further includes a U-shaped support plate, an inner insulating plate, an end plate, a top insulating plate and a pressing strip; wherein, the U-shaped support plate supports the bottom and the side of the soft-pack battery cell assembly formed by the plurality of soft-pack battery cells, and the inner insulating plate is arranged between the U-shaped support plate and the soft-pack battery cell assembly; There are two end plates, which are respectively arranged at both ends of the soft-pack battery cell assembly formed by a plurality of the soft-pack battery cells along the length direction of the U-shaped support plate, and the two end plates are respectively connected to the U-shaped support plate; the top insulating plate is pressed on the top of the soft-pack battery cell assembly by the pressing strip, and the pressing strip and the top insulating plate are connected to the U-shaped support plate through the same fixed points, and the pressing strip and the top insulating plate are connected to the end plates through the same fixed points.

11. The energy storage device according to claim 10, wherein The top insulating plate is provided with a through opening; and / or The end plate is provided with a second wire harness fixing buckle; and / or The soft-pack battery cell assembly is connected to the U-shaped support plate through a thermally conductive structural adhesive; and / or The battery module further includes foam, and the foam is respectively arranged between the two end plates and the soft-pack battery cell assembly; and / or The battery module further includes a PCB circuit board, a temperature probe, a bus bar, a cell insulating bracket, and a hollow insulating plate; wherein, the PCB circuit board is arranged between the top of the soft-pack battery cell assembly and the top insulating plate; the temperature probe is arranged on the PCB circuit board, and the temperature probe is used to detect the temperature of the soft-pack battery cell; the cell insulating bracket is arranged between the top of the soft-pack battery cell assembly and the PCB circuit board, and the tab of the soft-pack battery cell passes through the cell insulating bracket and is connected to the PCB circuit board by welding; the hollow insulating plate is arranged inside the battery module and supports below the cell insulating bracket; all the soft-pack battery cells are connected in series and / or in parallel through a plurality of the bus bars.

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