Battery pack and energy storage system

Abstract

The utility model discloses a battery pack and an energy storage system. The battery pack comprises a shell; a plurality of battery packs; the plurality of battery packs are arranged along the height direction and are arranged in the shell; each battery pack comprises a plurality of single blade batteries; the width direction of the single blade batteries is arranged along the height direction, the length direction of the single blade batteries is arranged along the first direction, and the single blade batteries are arranged along the second direction; the shell only accommodates one single blade battery along a first direction; the height direction, the first direction and the second direction are vertical pairwise; the value range of the length L1 of the single blade battery is as follows: L1 is more than or equal to 500 mm and less than or equal to 1350 mm; the value range of the width W1 of the single blade battery is as follows: W1 is more than or equal to 200mm and less than or equal to 319mm; the value range of the thickness T1 of the single blade battery is 25 mm < = T1 < = 40 mm. According to the technical scheme, the space utilization rate of the battery pack can be improved, more single blade batteries are arranged in the battery pack, and then the energy density of the battery pack can be improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of energy storage, especially relates to a battery pack and energy storage system. BACKGROUND

[0002] With the increasing development of science and technology, higher requirements are put forward for the energy density of the battery pack.

[0003] The traditional energy storage system is assembled by a plurality of square shell battery cells into a battery module, and a plurality of battery modules into a battery cluster. However, the tab welding of the square shell battery cell is on the top of the battery cell, so that the gap between adjacent battery cells is large; at the same time, since each battery module is an independent storage unit, that is, each battery module has a complete battery system, so that each battery module needs cluster internal power lines, cluster internal line connectors and box shells and other auxiliary materials to be assembled, and the series connection between each battery module needs cables and connectors to be completed to assemble the battery cluster. The above reasons result in low energy density of the energy storage system, which is not conducive to miniaturization of the energy storage system, thereby not conducive to transportation. In addition, the assembly process between each square shell battery cell and each battery module is complex, resulting in low reliability of the battery pack and high cost.

[0004] Therefore, there is an urgent need for an energy storage system with high energy density to meet the needs of the development of science and technology. SUMMARY

[0005] The utility model provides a kind of battery pack and energy storage system, to solve the defects existing in prior art, improve the energy density per unit area of energy storage system.

[0006] According to an aspect of the utility model, a battery pack is provided, comprising:

[0007] A shell;

[0008] A plurality of battery groups; a plurality of the battery groups are arranged along the height direction and are arranged in the shell;

[0009] Each of the battery groups comprises a plurality of monomer blade batteries;

[0010] The width direction of the monomer blade battery is arranged along the height direction, the length direction of the monomer blade battery is arranged along the first direction, and each of the monomer blade batteries is arranged along the second direction; the shell only accommodates one monomer blade battery along the first direction; the height direction, the first direction and the second direction are perpendicular to each other;

[0011] The length L1 of the single blade battery ranges from 500mm to 1350mm; the width W1 of the single blade battery ranges from 200mm to 319mm; and the thickness T1 of the single blade battery ranges from 25mm to 40mm.

[0012] Optionally, the length L1 and the thickness T1 of the single blade battery satisfy 12.5≤L1 / T1≤40.

[0013] Optionally, the length L1 and the width W1 of the single blade battery satisfy 1.57≤L1 / W1≤6.75.

[0014] Optionally, the width W1 and the thickness T1 of the single blade battery satisfy 5≤W1 / T1≤13.

[0015] Optionally, each single blade battery is provided with a first tab and a second tab at opposite ends in the first direction; the directions of the first tab and the second tab of adjacent two single blade batteries are opposite; and the adjacent two single blade batteries are connected in series.

[0016] Optionally, adjacent two battery groups are connected in series.

[0017] Optionally, the shell is a sheet metal cabinet.

[0018] Optionally, the shell is provided with at least one first cross beam extending in the first direction; a plurality of battery groups are arranged in the height direction to form a battery group array; and the first cross beam divides the battery group array into at least two parts in the height direction, each part of the battery group array including at least one battery group.

[0019] Optionally, the shell is provided with at least one second cross beam extending in the second direction; a plurality of battery groups are arranged in the height direction to form a battery group array; and the second cross beam divides the battery group array into at least two parts in the height direction, each part of the battery group array including at least one battery group.

[0020] Optionally, a fixed connecting member is arranged between adjacent two battery groups.

[0021] Optionally, the battery pack further includes a control assembly; and the control assembly is located on one side of the plurality of battery groups in the height direction.

[0022] In a second aspect, the utility model provides a kind of energy storage system, comprising: bottom tray and at least one as any above described battery pack;Each battery pack is arranged in the first direction.

[0023] Optionally, the energy storage system further comprises two limiting frames, the two limiting frames are respectively located on opposite sides of the bottom tray along the first direction, and each limiting frame is connected with the bottom tray, and a plane on which the limiting frame is located is perpendicular to the first direction.

[0024] Optionally, the energy storage system further comprises at least one top beam, a plane on which the top beam is located is parallel to a plane on which the bottom tray is located, and two ends of the top beam are respectively connected with the two limiting frames.

[0025] Optionally, the size H2 in the height direction of the cuboid formed by the bottom tray, the two limiting frames and the top beam is 2556mm, the size L2 in the first direction is 5718mm, and the size W2 in the second direction is 2098mm.

[0026] The technical scheme of the utility model discloses a battery pack comprising a shell and a plurality of battery groups, the battery groups are arranged along the height direction and arranged in the shell, and each battery group comprises a plurality of single-blade batteries, the width direction of the single-blade battery is arranged along the height direction, the length direction of the single-blade battery is arranged along the first direction, the single-blade batteries are arranged along the second direction, the length L1 of the single-blade battery is in the range of 500mm≤L1≤1350mm, the width W1 of the single-blade battery is in the range of 200mm≤W1≤319mm, and the thickness T1 of the single-blade battery is in the range of 25mm≤T1≤40mm, so that the space utilization of the battery pack can be improved, more single-blade batteries can be arranged in the battery pack, the energy density of the battery pack can be improved, the assembly process of the battery pack is simple, the reliability of the battery pack can be improved, and the cost can be reduced.

[0027] It should be understood that the content described in this part is not intended to identify key or important features of the embodiments of the utility model, and is not used to limit the scope of the utility model. Other features of the utility model will become easy to understand through the following description. BRIEF DESCRIPTION OF DRAWINGS

[0028] In order to more clearly illustrate the technical scheme in the embodiments of the utility model, the following will briefly introduce the drawings needed to be used in the embodiment description, and obviously, the drawings in the following description are only some embodiments of the utility model, and for the ordinary skilled in the art, other drawings can also be obtained according to these drawings without creating labor.

[0029] Figure 1 The utility model provides a three-dimensional view of the energy storage system of this embodiment;

[0030] Figure 2A perspective view of a battery pack is provided for the embodiment of the utility model;

[0031] Figure 3 A perspective view of a battery pack without a shell is provided for the embodiment of the utility model;

[0032] Figure 4 A perspective view of a battery pack is provided for the embodiment of the utility model;

[0033] Figure 5 A perspective view of a single-blade battery is provided for the embodiment of the utility model;

[0034] Figure 6 A perspective view of a shell is provided for the embodiment of the utility model. DETAILED DESCRIPTION

[0035] In order to make the person skilled in the art better understand the utility model scheme, the technical scheme in the embodiment of the utility model will be described clearly and completely below in combination with the drawings in the embodiment of the utility model, obviously, the described embodiment is only a part of the embodiment of the utility model, not all the embodiments. Based on the embodiment in the utility model, all other embodiments obtained by the person skilled in the art without creative labor should belong to the scope of protection of the utility model.

[0036] It should be noted that the terms "first", "second" and the like in the description and claims of the utility model and the above-mentioned drawings are used to distinguish similar objects, and do not have to be used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the utility model described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device including a series of steps or units does not have to be limited to the clearly listed steps or units, but can include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0037] It should be noted that in the embodiment, the height direction X, the first direction Y and the second direction Z are perpendicular to each other, and when the battery pack is installed and used, the height direction X is the up-down direction.

[0038] To solve the problem of low energy density of the existing energy storage system assembled by square shell battery cells, the embodiment provides a battery pack and an energy storage system. The battery pack can be closely arranged in a 20-foot container, thereby improving the energy density of the energy storage system based on the 20-foot container. The width of the 20-foot container is 5718mm, the depth is 2098mm, and the height is 2556mm. Since the size of the 20-foot container is a fixed value, how to design the battery pack and the size and arrangement of the battery cells in the battery pack is crucial to improving the energy density of the energy storage system.

[0039] Figure 1 A perspective view of the energy storage system provided by the embodiment is provided. The embodiment provides an energy storage system. As shown in Figure 1 , the energy storage system 100 includes a bottom tray 20 and at least one battery pack 10 provided by any embodiment of the utility model, and each battery pack 10 is arranged along the first direction Y.

[0040] The bottom tray 20 is used to support each battery pack 10. Each battery pack 10 is arranged along the first direction Y, that is, each battery pack 10 is arranged along the width direction of the battery pack 10, that is, each battery pack 10 is arranged along the length direction of the monomer blade battery.

[0041] Since the battery pack 10 provided by the embodiment is a complete battery system, the energy storage system does not need to be equipped with a control component, thereby fully utilizing the front and rear space of the energy storage system 100 of the 20-foot container, which is beneficial to improving the compactness and energy density of the energy storage system 100.

[0042] Since the energy storage system provided by the embodiment includes a bottom tray 20 and at least one battery pack provided by any embodiment of the utility model, the energy storage system provided by the embodiment has the technical features of the battery pack provided by any embodiment of the utility model, and can achieve the beneficial effects of the battery pack provided by any embodiment of the utility model. The same parts can be referred to the description of the battery pack provided by the embodiments of the utility model below, and will not be described here.

[0043] Optionally, continuing to refer to Figure 1 , the energy storage system 100 further includes two limiting frames 30; the two limiting frames 30 are respectively located on the opposite sides of the bottom tray 20 along the first direction Y, and each limiting frame 30 is connected with the bottom tray 20; the plane where the limiting frame 30 is located is perpendicular to the first direction Y, so that the limiting frame 30 can limit the position of each battery pack 10 in the bottom tray 20, to prevent the battery pack 10 from sliding out of the bottom tray 20 during the assembly or transportation of the energy storage system, which is beneficial to improving the safety of the energy storage system 100.

[0044] Optionally, continuing to refer to Figure 1As shown, the energy storage system 100 further comprises at least one top beam; the plane where the top beam is located is parallel to the plane where the bottom tray 20 is located, and the two ends of the top beam are connected with the two limiting frames 30 respectively, so that the battery pack 10 can be further prevented from sliding out of the bottom tray 20 during the assembly or carrying of the energy storage system, and the safety of the energy storage system 100 can be improved.

[0045] It should be understood that the energy storage system 100 comprising at least one top beam can mean that the energy storage system 100 comprises one top beam or the energy storage system 100 comprises multiple top beams. It should be noted that the top beam can extend along the first direction Y or be at an angle with the first direction Y, as long as the plane where the top beam is located is parallel to the plane where the bottom tray 20 is located, and the two ends of the top beam are connected with the two limiting frames 30 respectively. Figure 1 It should be understood that the energy storage system 100 comprising at least one top beam can mean that the energy storage system 100 comprises one top beam or the energy storage system 100 comprises multiple top beams. It should be noted that the top beam can extend along the first direction Y or be at an angle with the first direction Y, as long as the plane where the top beam is located is parallel to the plane where the bottom tray 20 is located, and the two ends of the top beam are connected with the two limiting frames 30 respectively.

[0046] Optionally, the size H2 of the cuboid formed by the bottom tray 20, the two limiting frames 30 and the top beam along the height direction X is 2556mm, the size L2 of the cuboid along the first direction Y is 5718mm, and the size W2 of the cuboid along the second direction Z is 2098mm.

[0047] Figure 2 A perspective view of a battery pack is provided for the embodiments of the utility model, Figure 3 A perspective view of a battery pack is provided for the embodiments of the utility model, Figure 4 A perspective view of a battery pack is provided for the embodiments of the utility model, Figure 5 A perspective view of a battery pack is provided for the embodiments of the utility model. Reference Figures 2 to 5 As shown, the energy storage system 100 further comprises at least one top beam; the plane where the top beam is located is parallel to the plane where the bottom tray 20 is located, and the two ends of the top beam are connected with the two limiting frames 30 respectively, so that the battery pack 10 can be further prevented from sliding out of the bottom tray 20 during the assembly or carrying of the energy storage system, and the safety of the energy storage system 100 can be improved.

[0048] The monomer blade battery 11 is in a cuboid shape, the height direction X is the width direction of the monomer blade battery 11, the first direction Y is the length direction of the monomer blade battery 11, and the second direction Z is the thickness direction of the monomer blade battery 11. Each monomer blade battery 11 is arranged along the second direction Z, that is, in the battery pack 10, only one monomer blade battery 11 is arranged along the height direction X and the second direction Z.

[0049] It can be understood that the larger the size of the monomer blade battery 11, the higher the requirement for the production process, and the more difficult to control the quality, resulting in poor reliability of the monomer blade battery 11, and the energy storage system 100 formed has certain safety hazards. Since the size of the 20-foot container is large, by dividing the internal space of the energy storage system 100 to place multiple battery packs 10, the size of the monomer blade battery 11 in the battery pack 10 can be reduced.

[0050] In an optional embodiment, the internal space of the energy storage system 100 is divided into i subspaces along the first direction Y, that is, the length direction of the energy storage system 100, where i is an integer greater than or equal to 2, each subspace can place one battery pack 10, and the length direction of the monomer blade battery 11 in the battery pack 10 is arranged along the first direction Y, so that the length L1 of each monomer blade battery 11 is not greater than (5718 / i) mm. Therefore, the more the number of divided subspaces, that is, the greater i, the smaller the length L1 of the monomer blade battery 11.

[0051] However, due to the influence of some factors, for example, the peripheral parts of the battery pack 10 including thermal insulation materials, liquid cooling systems, insulation protection, etc. will occupy the internal space of the shell 2, resulting in that the monomer blade battery 11 cannot completely fill the accommodating cavity inside the shell 2 of the battery pack 10. Therefore, the more the number of divided subspaces, that is, the greater i, that is, the more the number of battery packs 10 in the energy storage system 100, the smaller the ratio of the sum of the volumes of the monomer blade batteries 11 to the volume of the battery pack 10, that is, the lower the space utilization rate of the battery pack 10, thereby not conducive to improving the energy density of the energy storage system 100.

[0052] In this embodiment, the size of the battery pack 10 and the size of each monomer blade battery 11 in the battery pack 10 can be derived from the size of the container. Table 1 exemplarily shows the derivation process of the length of part of the monomer blade battery 11, wherein the battery pack 10 width refers to the size of the battery pack 10 along the first direction Y; the battery pack 10 inner width refers to the size of the battery pack 10 inside, along the first direction Y, where the monomer blade battery 11 can be arranged, i.e. the available width of the battery pack 10 after removing the peripheral components; the cell length refers to the length of the battery body of the monomer blade battery 11, i.e. the length of the monomer blade battery 11 after removing the positive and negative tabs; the monomer battery capacity refers to the capacity of each monomer blade battery 11; and the container capacity refers to the capacity of the energy storage system 100. As can be seen, after the internal space of the energy storage system 100 is divided, the capacity of the energy storage system 100 as a whole is not the same when the number of battery packs 10 that can be placed along the first direction Y is different.

[0053]

[0054] Table 1. Calculation and derivation table of battery length provided in this embodiment

[0055] By setting the length L1 of the monomer blade battery 11 to be in the range of 500mm≤L1≤1350mm, the width W1 of the monomer blade battery 11 to be in the range of 200mm≤W1≤319mm, and the thickness T1 of the monomer blade battery 11 to be in the range of 25mm≤T1≤40mm, the space utilization rate of the battery pack 10 is high, thereby maximizing the energy density of the energy storage system 100.

[0056] In this embodiment, by providing a battery pack including a shell and a plurality of battery groups, each battery group is arranged along the height direction and arranged in the shell, and each battery group includes a plurality of monomer blade batteries, the width direction of the monomer blade battery is arranged along the height direction, the length direction of the monomer blade battery is arranged along the first direction, each monomer blade battery is arranged along the second direction, the length L1 of the monomer blade battery is in the range of 500mm≤L1≤1350mm, the width W1 of the monomer blade battery is in the range of 200mm≤W1≤319mm, and the thickness T1 of the monomer blade battery is in the range of 25mm≤T1≤40mm, thereby improving the space utilization rate of the battery pack, arranging more monomer blade batteries in the battery pack, and further improving the energy density of the battery pack. At the same time, the assembly process of the battery pack is simple, thereby improving the reliability of the battery pack and being conducive to reducing the cost.

[0057] Optionally, a length L1 of the single blade battery and a thickness T1 satisfy 12.5≤L1 / T1≤40, a length L1 of the single blade battery and a width W1 satisfy 1.57≤L1 / W1≤6.75, and a width W1 of the single blade battery and the thickness T1 satisfy 5≤W1 / T1≤13, so that the volume of the battery in the battery pack 10 of a certain specification is smaller.

[0058] Optionally, as shown in Figures 3 to 5 Optionally, as shown in

[0059] Optionally, the first tab 111 is a positive tab of the single blade battery 11, and the second tab 112 is a negative tab of the single blade battery 11, or the first tab 111 is a negative tab of the single blade battery 11, and the second tab 112 is a positive tab of the single blade battery 11.

[0060] Optionally, as shown in

[0061] Optionally, the two adjacent battery groups 1 are connected in series.

[0062] Optionally, the two adjacent battery groups 1 are connected in series.

[0063] Optionally, as shown in Figure 3 Optionally, the two adjacent battery groups 1 are connected in series.

[0064] Optionally, the two adjacent battery groups 1 are connected in series.

[0065] In the embodiment, the positive and negative electrode tabs of the single blade battery 11 are arranged at two ends of the single blade battery 11, so that when the single blade batteries 11 are arranged along the second direction Z, the single blade batteries 11 are not interfered by the positive and negative electrode tabs and the lines, and the arrangement compactness of the single blade batteries 11 in each battery pack 1 can be improved. Meanwhile, when the battery pack 1 is arranged along the height direction X, the positive and negative electrode tabs and the lines of the single blade battery 11 do not interfere, which is beneficial to improve the arrangement compactness of the battery pack 10. In this way, the energy density of the battery pack 10 is improved.

[0066] The shell 2 can be understood as a housing for accommodating a plurality of battery packs 1. In an optional embodiment, as shown in Figure 6 The shell 2 is a sheet metal cabinet, so that the assembly of the battery pack 10 can be completed by only pushing each battery pack 1 into the sheet metal cabinet, which is beneficial to improve the assembly efficiency.

[0067] It can be understood that since the plurality of battery packs 1 are arranged along the height direction X, i.e., a plurality of layers of battery packs 1 are arranged along the height direction X, the battery pack 1 located in the lower layer is pressed by the battery pack 1 located in the upper layer, thereby affecting the reliability and safety performance of the battery pack 10. Therefore, the battery pack 1 located in the upper layer can be supported to prevent the battery pack 1 located in the lower layer from being pressed.

[0068] Optionally, continuing to refer to Figure 6 The shell 2 is provided with at least one first beam 21 extending along the first direction Y; the plurality of battery packs 1 are arranged along the height direction X to form a battery pack 1 array; and the first beam 21 divides the battery pack 1 array along the height direction X into at least two parts, and each part of the battery pack 1 array includes at least one battery pack 1.

[0069] The shell 2 is provided with at least one first beam 21 extending along the first direction Y; the plurality of battery packs 1 are arranged along the height direction X to form a battery pack 1 array; and the first beam 21 divides the battery pack 1 array along the height direction X into at least two parts, and each part of the battery pack 1 array includes at least one battery pack 1.

[0070] Optionally, continuing to refer to Figure 6 The shell 2 is provided with at least one second beam 22 extending along the second direction Z; the plurality of battery packs 1 are arranged along the height direction X to form a battery pack 1 array; and the second beam 22 divides the battery pack 1 array along the height direction X into at least two parts, and each part of the battery pack 1 array includes at least one battery pack 1.

[0071] The at least one second beam 22 extending along the second direction Z on the shell 2 can be understood as one second beam 22 extending along the second direction Z in the shell 2 or at least a plurality of second beams 22 extending along the second direction Z on the shell 2. By dividing the array of battery packs 1 into at least two parts along the height direction X by the second beam 22, the second beam 22 can support the battery pack 1 above the second beam 22, thereby further preventing the battery pack 1 below the first beam 21 from being pressed by the battery pack 1 above the first beam 21.

[0072] It should be noted that, Figure 6 It is only exemplarily shown that two first beams 21 extending along the first direction Y are arranged in the shell 2, and four second beams 22 extending along the second direction Z are arranged, which does not limit the number of the first beams 21 and the second beams 22. In the embodiment, the number of the first beams 21 and the second beams 22 can be designed according to actual requirements.

[0073] In the embodiment, since the length direction of the monomer blade battery 11 is arranged along the first direction Y, and the shell 2 only accommodates one monomer blade battery 11 along the first direction Y, that is, the monomer blade battery 11 cannot be arranged in two or more numbers along the first direction Y, so that the accommodating cavity inside the shell 2 does not need to be further provided with a beam for supporting the battery pack 1, greatly simplifying the structure of the shell 2, and reducing the space occupied by the internal beam, thereby further improving the space utilization of the battery pack 10, and further improving the energy density of the battery pack 10.

[0074] Optionally, the battery pack 10 further comprises a control assembly 3, which is located on one side of the plurality of battery packs 1 along the height direction X.

[0075] The control assembly 3 can include, but is not limited to, components such as electrical components, thermal management components, and battery management components that make up a battery system. As a storage unit, the battery pack 10 needs to be provided with a complete battery system. By arranging the control assembly 3 of the battery pack 10 on one side of the plurality of battery packs 1, for example, arranging the control assembly 3 below or below the plurality of battery packs 1, the size of the battery pack 10 in the first direction Y can be reduced, thereby reducing the overall size of the battery pack 10, and further improving the energy density of the battery pack 10.

[0076] The above specific embodiments do not constitute a limitation on the protection scope of the present application. Those skilled in the art should understand that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A battery pack, characterized in that, include: case; Multiple battery packs; The plurality of battery packs are arranged along the height direction and disposed within the housing; Each of the battery packs comprises multiple individual blade batteries; The width direction of the individual blade battery is arranged along the height direction, the length direction of the individual blade battery is arranged along the first direction, and each individual blade battery is arranged along the second direction; the housing accommodates only one individual blade battery along the first direction; the height direction, the first direction, and the second direction are perpendicular to each other; The length L1 of the single blade battery is in the range of 500mm≤L1≤1350mm; the width W1 of the single blade battery is in the range of 200mm≤W1≤319mm; and the thickness T1 of the single blade battery is in the range of 25mm≤T1≤40mm.

2. The battery pack according to claim 1, characterized in that, The length L1 and thickness T1 of the single blade battery satisfy the following condition: 12.5≤L1 / T1≤40.

3. The battery pack according to claim 1, characterized in that, The length L1 and width W1 of the single blade battery satisfy the following condition: 1.57≤L1 / W1≤6.

75.

4. The battery pack according to claim 1, characterized in that, The width W1 and thickness T1 of the single blade battery satisfy the following condition: 5 ≤ W1 / T1 ≤ 13.

5. The battery pack according to claim 1, characterized in that, Along the first direction, each blade battery cell has a first tab and a second tab at opposite ends; in two adjacent blade batteries cell, the first tab and the second tab are in opposite directions; and two adjacent blade batteries cell are connected in series.

6. The battery pack according to claim 5, characterized in that, The two adjacent battery packs are connected in series.

7. The battery pack according to claim 1, characterized in that, The casing is a sheet metal cabinet.

8. The battery pack according to claim 7, characterized in that, At least one first crossbeam extending along the first direction is provided on the housing; a plurality of battery packs are arranged along the height direction to form a battery pack array; the first crossbeam divides the battery pack array into at least two parts along the height direction, and each part of the battery pack array includes at least one of the battery packs.

9. The battery pack according to claim 7, characterized in that, At least one second crossbeam extending along the second direction is provided on the housing; a plurality of battery packs are arranged along the height direction to form a battery pack array; the second crossbeam divides the battery pack array into at least two parts along the height direction, and each part of the battery pack array includes at least one of the battery packs.

10. The battery pack according to claim 7, characterized in that, A fixed connector is provided between two adjacent battery packs.

11. The battery pack according to claim 7, characterized in that, Also includes: Control components; Along the height direction, the control component is located on one side of the plurality of battery packs.

12. An energy storage system, characterized in that, include: A bottom tray and at least one battery pack as described in any one of claims 1-11; Each of the battery packs is arranged along a first direction.

13. The energy storage system according to claim 12, characterized in that, It also includes two limiting frames; the two limiting frames are respectively located on opposite sides of the bottom tray along the first direction, and each limiting frame is connected to the bottom tray; the plane in which the limiting frames are located is perpendicular to the first direction.

14. The energy storage system according to claim 13, characterized in that, It also includes at least one top beam; the plane on which the top beam is located is parallel to the plane on which the bottom tray is located, and the two ends of the top beam are respectively connected to the two limiting frames.

15. The energy storage system according to claim 14, characterized in that, In the cuboid formed by the bottom tray, the two limiting frames, and the top beam, the dimension H2 along the height direction is 2556mm, the dimension L2 along the first direction is 5718mm, and the dimension W2 along the second direction is 2098mm.

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