Battery pack and energy storage device

Abstract

The utility model discloses a battery pack and energy storage equipment, and relates to the technical field of energy storage equipment. The battery pack comprises a box body, a battery module and a plurality of pulley assemblies, the battery module is arranged in the box body; the multiple pulley assemblies are sequentially arranged on the bottom face of the box body in the installation direction of the box body, and the centers of pulleys of the multiple pulley assemblies are not located on the same straight line in the installation direction of the box body.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of energy storage devices, in particular to a battery pack and an energy storage device. BACKGROUND

[0002] In order to balance the fluctuations of wind power generation and photovoltaic power generation in time and region, the prior art provides a peak clipping and valley filling technology mainly using energy storage batteries to reduce the fluctuations of power supply and ensure power supply. In order to adapt to large power regulation in units of energy storage power stations, the batteries are generally in the form of cell-battery pack or module-battery cluster for subsequent large module management.

[0003] However, the battery pack is heavy as a whole, and the installation position in the cluster is narrow, which is not conducive to installation operation, and there are certain difficulties in installing the battery pack, and the accuracy of the installation position is difficult to control. At the same time, the disassembly work required for subsequent maintenance and maintenance after installation is also relatively difficult. Practical new type content

[0004] The embodiments of the present application provide a battery pack and an energy storage device. A plurality of pulley assemblies are arranged on the bottom surface of the battery pack, and the centers of the pulleys of the plurality of pulley assemblies are not on the same straight line. When the battery pack is pushed into the battery pack containing space, line-surface contact is achieved, and installation positioning, assembly and disassembly are relatively simple.

[0005] The battery pack of the embodiments of the present application comprises:

[0006] a box body;

[0007] a battery module arranged in the box body, the battery module comprising a plurality of battery monomers; and

[0008] a plurality of pulley assemblies, the plurality of pulley assemblies being arranged in sequence on the bottom surface of the box body along the installation direction of the box body, and the centers of the pulleys of the plurality of pulley assemblies not being on the same straight line along the installation direction of the box body.

[0009] The energy storage device of the present application comprises a cabinet body and the battery pack of the above-mentioned embodiments, and the cabinet body comprises a plurality of battery pack containing spaces. The battery pack is arranged in the battery pack containing space.

[0010] In the battery pack and the energy storage device of the embodiments of the present application, a plurality of pulley assemblies are arranged on the bottom surface of the battery pack, and the plurality of pulley assemblies are arranged in sequence along the installation direction of the battery pack. When the battery pack is pushed into the corresponding battery pack containing space, the pulleys can realize line-surface contact with the battery pack containing space, and assembly and disassembly are relatively simple.

[0011] And the battery pack containing space is generally provided with a mounting groove opposite to the pulley. In the case that the battery pack is completely pushed into the battery pack containing space, the pulley is just sunk into the corresponding mounting groove, so as to realize the positioning installation of the battery pack, so that the bottom surface of the battery pack and the bearing surface of the battery pack containing space are in contact. When the battery pack is not completely pushed in, the centers of the pulleys of the plurality of pulley assemblies are not arranged on the same straight line, so that the pulleys are not sunk into the corresponding mounting grooves and are not stuck, thereby avoiding the problem of difficult installation of the battery pack.

[0012] Therefore, the positioning installation of the battery pack is realized, and the difficulty of assembly and disassembly of the battery pack is reduced.

[0013] Additional aspects and advantages of the embodiments disclosed herein will be set forth in part in the description that follows, and in part will become apparent to those skilled in the art upon examination of the following description and drawings or can be learned by practice of the embodiments disclosed herein. BRIEF DESCRIPTION OF DRAWINGS

[0014] The above and / or additional aspects and advantages of the embodiments disclosed herein will become apparent and be readily appreciated from the following description, taken in conjunction with the accompanying drawings, in which:

[0015] Figure 1 is a first perspective structural schematic view of a battery pack according to some embodiments of the present application.

[0016] Figure 2 is a second perspective structural schematic view of a battery pack according to some embodiments of the present application.

[0017] Figure 3 is a first plan schematic view of a battery pack according to some embodiments of the present application.

[0018] Figure 4 is a second plan schematic view of a battery pack according to some embodiments of the present application.

[0019] Figure 5 is a perspective structural schematic view of an energy storage device according to some embodiments of the present application.

[0020] Figure 6 is a first plan schematic view of an energy storage device according to some embodiments of the present application.

[0021] Figure 7 is a second plan schematic view of an energy storage device according to some embodiments of the present application.

[0022] Main element symbols:

[0023] Energy storage device 100;

[0024] The battery pack 10, the box body 11, the bottom surface 111, the side surface 112, the top surface 113, the pulley groove 114, the battery module 12, the pulley assembly 13, the pulley 131, the fixing plate 132, the through hole 1321;

[0025] The cabinet body 20, the support 21, the support piece 22, the track surface 221, the mounting groove 222, the limiting block 223, the flange 224, the limiting piece 223, the battery pack containing space 23, the fixing block 24, the bolt 25. DETAILED DESCRIPTION

[0026] The embodiments of the present application will be further described below with reference to the drawings. Identical or similar reference numerals are used throughout the drawings to represent identical or similar elements or elements having the same or similar functions.

[0027] In addition, the embodiments of the present application described below in conjunction with the drawings are exemplary and are only used to explain the embodiments of the present application, and cannot be understood as a limitation of the present application.

[0028] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact through an intermediate medium. Moreover, the first feature "above", "over" and "on" the second feature can be directly above or obliquely above the first feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "under" and "under" the second feature can be directly below or obliquely below the first feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0029] Please refer to Figures 1 to 4 The battery pack 10 of the present application includes a box body 11, a battery module 12 and a plurality of pulley assemblies 13. The battery module 12 is arranged in the box body 11, the battery module 12 includes a plurality of battery monomers; the plurality of pulley assemblies 13 are sequentially arranged on the bottom surface 111 of the box body 11 along the installation direction (such as the y direction shown) of the battery pack 10, and the centers of the pulleys 131 of the plurality of pulley assemblies 13 are not on the same straight line along the installation direction of the box body 11. Figure 5

[0030] The battery pack 10 and the energy storage device 100 of the embodiments of the present application, the bottom surface 111 of the battery pack 10 is provided with a plurality of pulley assemblies 13, the plurality of pulley assemblies 13 are sequentially arranged along the installation direction of the battery pack 10, when the battery pack 10 is pushed into the corresponding battery pack containing space, the pulley 131 can realize line-surface contact with the battery pack containing space, and the assembly and disassembly are relatively simple.

[0031] ​Furthermore, the battery compartment typically has a mounting groove corresponding to the pulley 131. When the battery pack 10 is fully pushed into the battery compartment, the pulley 131 fits perfectly into the corresponding mounting groove, thus achieving the positioning and installation of the battery pack 10 and ensuring contact between the bottom surface 111 of the battery pack 10 and the bearing surface of the battery compartment. When the battery pack 10 is not fully pushed in, the centers of the pulley 131 are not aligned, preventing the pulley 131 from getting stuck in the wrong mounting groove and causing installation difficulties for the battery pack 10.

[0032] This facilitates the positioning and installation of the battery pack 10 and reduces the difficulty of assembling and disassembling the battery pack 10. After the battery pack 10 is installed, the pulley 131 sinks into the corresponding mounting groove, and the bottom surface 111 of the battery pack 10 and the bearing surface of the battery pack housing space make full contact, which can ensure the transportation stability and safety of the energy storage device 100.

[0033] Please combine Figures 5 to 7 This application provides an energy storage device 100, which includes a cabinet 20 and a plurality of battery packs 10. The battery packs 10 are installed inside the cabinet 20.

[0034] The cabinet 20 includes a bracket 21 and a support member 22. The bracket 21 and the support member 22 are cross-connected to form multiple battery housing spaces 23.

[0035] For example, the bracket 21 is a vertically arranged reinforcing rib, while the support member 22 is horizontally arranged. The support member 22 and the reinforcing rib are arranged in a cross shape to form multiple battery enclosure spaces 23. For example, the support member 22 is used to support the battery pack 10, along the vertical direction (e.g., ...). Figure 5 As shown in the z-direction, multiple rows of support members 22 are arranged sequentially, and a battery housing space 23 is formed between any two rows of support members 22. The extension direction of the support members 22 is the installation direction of the battery pack 10. The battery pack 10 is pushed into the battery housing space 23 along the support members 22 to install the battery pack 10 into the battery housing space 23.

[0036] The battery pack 10 is housed within a space 23 containing at least two opposing support members 22 (such as a first support member and a second support member). The two sides of the battery pack 10 are supported on the track surfaces of the two support members 22. Thus, by using the two opposing support members 22, the battery pack 10 is stably supported, costs are reduced, and the middle area of ​​the battery pack 10 remains unobstructed, thereby improving the heat dissipation performance of the battery pack 10.

[0037] Optionally, the rail surface 221 of the support 22 is provided with mounting grooves 222, and the pulley 131 of the battery pack 10 falls into the corresponding mounting groove 222 when the battery pack 10 is installed into the battery pack containing space 23 (i.e., the battery pack 10 is completely pushed into the battery pack containing space 23).

[0038] Thus, during the installation process, the pulley 131 realizes the line-surface contact between the battery pack 10 and the battery pack containing space 23, reduces the wear of the battery pack 10, and after the installation of the battery pack 10 is completed, the pulley 131 of the battery pack 10 is sunk into the corresponding mounting groove 222, which can realize the limiting of the battery pack 10 and avoid the battery pack 10 from sliding out of the battery pack containing space 23.

[0039] Optionally, the mounting groove 222 and the pulley 131 of the pulley assembly 13 are one-to-one corresponding and size-matched. Thus, when the battery pack 10 is installed into the battery pack containing space 23, the pulley 131 is located in the corresponding mounting groove 222 and is combined closely, which can improve the limiting effect of the mounting groove 222 on the battery pack 10 and improve the installation stability of the battery pack 10.

[0040] Optionally, when the battery pack 10 is installed into the battery pack containing space 23, the bottom surface 111 of the battery pack 10 is in contact with the rail surface 221 of the support 22.

[0041] Thus, when the pulley 131 is sunk into the corresponding mounting groove 222, the bottom surface 111 of the battery pack 10 is in contact with the rail surface 221 of the support 22, realizing the surface-surface contact between the battery pack 10 and the rail surface 221, which not only can realize the limiting of the battery pack 10, but also can ensure the installation stability of the battery pack 10. During the transportation of the energy storage device 100, the battery pack 10 is always in stable contact with the battery pack containing space 23, ensuring the stability of the energy storage device 100 during the transportation process, thereby ensuring the transportation safety.

[0042] Optionally, the support 22 includes opposite first and second ends, which are sequentially arranged along the installation direction of the battery pack 10, and the second end is provided with a limiting block 223.

[0043] Thus, the limiting block 223 limits the battery pack 10 in the installation direction, avoiding the battery pack 10 from being pushed too far and damaging the cabinet 20 during the installation process. When the battery pack 10 is installed into the battery pack containing space 23, the battery pack 10 and the limiting block 223 are sequentially arranged along the installation direction.

[0044] Optionally, the first end of the support 22 is provided with a flange 224, and the cabinet 20 further comprises a fixing block 24 and a bolt 25, the bolt 25 is sequentially arranged in the fixing block 24 and the flange 224, so as to install the fixing block 24 on the flange 224, and the battery pack 10 is located between the limiting block 223 and the fixing block 24.

[0045] In this way, the fixing block 24 is fixed to the flange 224 of the first end of the support 22 by the bolt 25, so that the battery pack 10 is located between the fixing block 24 and the limiting block 223, and the fixing block 24 cooperates with the limiting block 223 to limit the battery pack 10 in the installation direction, thereby avoiding the battery pack 10 from sliding out of the battery pack containing space 23 and improving the installation stability of the battery pack 10.

[0046] Optionally, the first support and the second support of the battery pack containing space 23 are located on both sides of the battery pack 10 respectively, and the support 22 further comprises a limiting piece 225, the limiting piece 225 is arranged on the track surface 221, and the battery pack 10 is located between the limiting pieces 225 of the first support and the second support.

[0047] Among them, the height of the limiting piece 225 is higher than the height of the ground of the battery pack 10. For example, the limiting piece 225 can be a limiting surface extending away from the track surface 221 from the edge of the track surface 221.

[0048] In this way, the battery pack 10 is limited in the width direction (for example, the x direction shown in the figure, the width direction is perpendicular to the installation direction of the battery pack 10, or in other words, perpendicular to the length direction of the battery pack 10) by the limiting piece 225 of the first support and the limiting piece 225 of the second support on both sides of the battery pack 10, further improving the installation stability of the battery pack 10. Figure 5

[0049] Please refer again to Figures 1 to 4 The battery pack 10 of the embodiment of the application comprises a box body 11, a battery module 12 and a plurality of pulley assemblies 13.

[0050] Among them, the box body 11 forms a containing space for containing the battery module 12. The box body 11 comprises a bottom surface 111, a side surface 112 and a top surface 113, the bottom surface 111 and the top surface 113 are opposite, and the side surface 112 connects the top surface 113 and the bottom surface 111.

[0051] Among them, the battery module 12 comprises a plurality of battery monomers, the plurality of battery monomers are combined into the battery module 12 by series connection, parallel connection or series-parallel connection hybrid mode, and the battery module 12 comprises one or more, and the one or more battery modules 12 are further packaged and integrated to form the battery pack 10.

[0052] ​The battery cell is modularly designed, facilitating replacement or maintenance of the battery cell when any battery cell fails (e.g., hardware failure, thermal runaway, etc.). The battery module 1230 forms a power supply loop with an external load through the total positive and total negative, thereby supplying power. The battery module 1230 is a core component of the energy storage device 100, used for energy storage and power supply.

[0053] Optionally, the battery cell is a rectangular body, and the plurality of battery cells are arranged in a rectangular array. In this way, the plurality of battery cells are arranged more compactly, facilitating miniaturization of the energy storage device 100.

[0054] Optionally, the battery cell includes a battery shell, a battery core, and an explosion-proof valve. The battery core is arranged in the battery shell, and the explosion-proof valve is arranged in the battery shell. When the battery core experiences thermal runaway, overcharging, or the like, reaction gas is generated, and the pressure in the battery shell continuously rises. The explosion-proof valve is used for pressure relief to avoid explosion of the battery cell.

[0055] Optionally, the plurality of battery packs 10 are respectively installed into the battery pack containing spaces 23 of the cabinet 20 to form a battery cluster. The energy storage device 100 can include one or more battery clusters.

[0056] In some embodiments, the energy storage device 100 can be an energy storage cabinet, and the cabinet 20 is provided with one or more battery clusters. The cabinet 20 is also equipped with a complete power conversion, monitoring, management, and the like system.

[0057] The plurality of pulley assemblies 13 are arranged in sequence along the installation direction of the battery pack 10. In this way, the plurality of pulley assemblies 13 arranged along the installation direction of the battery pack 10 facilitate installation of the battery pack 10, and the plurality of pulley assemblies 13 can provide stable support when the battery pack 10 is placed.

[0058] Optionally, the plurality of pulley assemblies 13 include a plurality of pulley assemblies 13 arranged in sequence along the installation direction of the battery pack 10. In this way, the plurality of pulley assemblies 13 arranged along the installation direction of the battery pack 10 facilitate installation of the battery pack 10, and the plurality of pulley assemblies 13 can provide stable support when the battery pack 10 is placed.

[0059] Optionally, along the installation direction of the battery pack 10, the centers of the plurality of pulley assemblies 13 are not on the same straight line.

[0060] The center of the pulley 131 can be the center of the pulley 131 along the width direction of the battery pack 10. For example, the center of the pulley 131 can be determined as the projection of the center of the pulley 131 on the bottom wall of the battery pack 10, and then a center line along the width direction of the battery pack 10 in the projection is determined. The center of the pulley 131 can be any point on the center line. Alternatively, the pulley 131 can be a circular pulley, and the center of the pulley 131 can be the center of the circle.

[0061] It can be understood that, since the track surface 221 of the support 22 is provided with the mounting groove 222 corresponding to the pulley 131 of each pulley assembly 13, when the battery pack 10 is pushed into the battery pack containing space 23, among the plurality of pulley assemblies 13 arranged in sequence along the mounting direction, the pulley 131 of the last pulley assembly 13 enters the battery pack containing space 23 first, and then the pulley 131 passes through the mounting groove 222 corresponding to the first pulley assembly 13. If the pulley 131 just passes directly above the mounting groove 222, the pulley 131 of the last pulley assembly 13 will sink into the mounting groove 222 corresponding to the first pulley assembly 13, thereby causing the battery pack 10 to be stuck, and the user needs to exert greater force to continue to push the battery pack, causing the battery pack 10 to be difficult to install, and even when the force is too great, the pulley assembly 13 or even the battery pack 10 is damaged.

[0062] Therefore, the centers of the pulleys 131 of the plurality of pulley assemblies 13 are not on the same straight line along the mounting direction of the battery pack 10. When the pulley 131 of the last pulley assembly 13 reaches the mounting groove 222 corresponding to the first pulley assembly 13, the center of the pulley 131 of the last pulley assembly 13 is offset relative to the center of the pulley 131 of the first pulley assembly 13 in the width direction of the battery pack 10, so that the pulley 131 of the last pulley assembly 13 will not be located directly above the mounting groove 222 corresponding to the first pulley assembly 13, and the size of the pulley 131 and the mounting groove 222 is matched (generally the same (for example, the projection size of the pulley 131 on the track surface 221 is the same as the size of the slot of the mounting groove 222)). This will cause the pulley 131 to be at least partially located outside the mounting groove 222, thereby being at least partially supported on the track surface 221 and not sinking into the mounting groove 222 corresponding to the first pulley assembly 13.

[0063] Optionally, the centers of the pulleys 131 of the plurality of pulley assemblies 13 are not on the same straight line, that is, the centers of the pulleys 131 of any two pulley assemblies 13 are not on the same straight line.

[0064] In this way, before the pulley 131 of the last pulley assembly 13 slides into the corresponding mounting groove 222, it will not sink into other mounting grooves 222, and before the pulley 131 of each of the other pulley assemblies 13 slides into the corresponding mounting groove 222, it will not sink into other mounting grooves 222.

[0065] Optionally, among the plurality of pulley assemblies 13 arranged in sequence along the mounting direction, the centers of the pulleys 131 of the last n pulley assemblies 13 are not on the same straight line, and the centers of the pulleys 131 of the last n pulley assemblies 13 are not on the same straight line as the centers of the pulleys 131 of the other pulley assemblies 13, where n is greater than or equal to 2.

[0066] It can be understood that, since the centers of the pulleys 131 of the last n pulley assemblies 13 are not on the same straight line, and the centers of the pulleys 131 of the last n pulley assemblies 13 are not on the same straight line as the centers of the pulleys 131 of the other pulley assemblies 13, the pulleys 131 of the last n pulley assemblies 13 will not fall into the other mounting grooves 222 before sliding into the corresponding mounting grooves 222, and the pulleys 131 of the last n pulley assemblies 13 can well support the battery pack, so that even if the pulleys 131 of the other pulley assemblies 13 than the last n pulley assemblies 13 slide directly above the mounting grooves 222 that do not correspond to them, they will not fall into the mounting grooves 222 that do not correspond to them because of the support of the pulleys 131 of the last n pulley assemblies 13 that do not fall into the corresponding mounting grooves 222.

[0067] In this way, the problem that the battery pack 10 is stuck by the mounting grooves 222 when the battery pack 10 is not completely pushed into the battery pack containing space 23 is avoided, and it is ensured that the battery pack 10 can be smoothly and completely pushed into the battery pack containing space 23. Moreover, the centers of the pulleys 131 of the other pulley assemblies 13 than the last n pulley assemblies 13 are arranged more freely, for example, the centers of the pulleys 131 of the other pulley assemblies 13 can be on the same straight line, as long as they are not on the same straight line as the centers of the pulleys 131 of the last n pulley assemblies 13.

[0068] In one example, the pulley assemblies 13 include a first pulley assembly A, a second pulley assembly B, and a third pulley assembly C, which are arranged in sequence along the mounting direction of the battery pack 10, the centers of the pulleys 131 of the first pulley assembly A, the second pulley assembly B, and the third pulley assembly C are not on the same straight line, and the mounting direction of the battery pack 10 is parallel to the length direction of the battery pack 10.

[0069] Considering that the weight of the battery pack 10 is generally large and the size of the pulley assembly 13 is generally small (for reducing the size of the battery pack 10), if the number of pulley assemblies 13 is too small, it will cause the pulley assembly 13 to be insufficient in bearing capacity, thereby being damaged. Therefore, based on the specific bearing requirement, a plurality of pulley assemblies 13 can be arranged, for example, three pulley assemblies 13 (i.e., the first pulley assembly A, the second pulley assembly B, and the third pulley assembly C) can be arranged, to realize the bearing of the battery pack 10 and the mounting of the battery pack 10.

[0070] Optionally, each group of pulley assemblies 13 can include a plurality of pulley assemblies 13 arranged along the width direction of the battery pack 10, to distribute the bearing of the battery pack 10 to different positions in the width direction, so as to avoid damage of a single pulley assembly 13 due to excessive force.

[0071] For example, as the first pulley assembly A, the second pulley assembly B and the third pulley assembly C each include multiple, in the width direction of the battery pack 10, multiple first pulley assemblies A (such as first pulley assemblies A1 and A2) are symmetrically arranged at both ends of the box body 11, multiple second pulley assemblies B (such as second pulley assemblies B1 and B2) are arranged at both ends of the box body 11 respectively, and multiple third pulley assemblies C (such as third pulley assemblies C1 and C2) are arranged at both ends of the box body 11 respectively.

[0072] For another example, as the first pulley assembly A, the second pulley assembly B and the third pulley assembly C each include 2, in the width direction of the battery pack 10, 2 first pulley assemblies A (such as first pulley assemblies A1 and A2) are symmetrically arranged at both ends of the box body 11, 2 second pulley assemblies B (such as second pulley assemblies B1 and B2) are arranged at both ends of the box body 11 respectively, and 2 third pulley assemblies C (such as third pulley assemblies C1 and C2) are arranged at both ends of the box body 11 respectively.

[0073] Among them, the symmetric arrangement of the 2 pulley assemblies 13 (such as the 2 first pulley assemblies A) means that the 2 pulley assemblies 13 are symmetrically arranged along the center line parallel to the length direction of the box body 11.

[0074] In this way, each group of pulley assemblies 13 includes 2 pulley assemblies 13 arranged at both ends of the box body 11 respectively, so that the 2 pulley assemblies 13 are in contact with the 2 supporting pieces 22 respectively, and the 2 pulley assemblies 13 realize uniform force of the battery pack 10, in the case of realizing stable bearing of the battery pack 10, realizing line-surface contact installation of the battery pack 10 and the supporting piece 22.

[0075] Optionally, in the width direction of the battery pack 10, the box body 11 includes opposite first and second ends, the distance between the center of each first pulley assembly A arranged at the first end and the center of each first pulley assembly A arranged at the second end is a first distance; the distance between the center of each second pulley assembly B arranged at the first end and the center of each second pulley assembly B arranged at the second end is a second distance; the distance between the center of each third pulley assembly C arranged at the first end and the center of each third pulley assembly C arranged at the second end is a third distance, and the first distance, the second distance and the third distance are different.

[0076] For example, the first pulley assembly A arranged at the first end includes 2, and the center of the 2 first pulley assemblies A at the first end can be the midpoint of the line connecting the pulleys 131 of the 2 first pulley assemblies A, the first pulley assembly A arranged at the second end includes 3, and the center of the 3 first pulley assemblies A at the second end can be the pulley 131 center of the first pulley assembly A among the 3 first pulley assemblies A.

[0077] Please refer to Figure 3Optionally, the first pulley assembly A, the second pulley assembly B and the third pulley assembly C each include two, the first spacing d1 between the centers of the two pulleys 131 of the first pulley assembly A, the second spacing d2 between the centers of the two pulleys 131 of the second pulley assembly B and the third spacing d3 between the centers of the two pulleys 131 of the third pulley assembly C are all different.

[0078] In this way, by setting the spacing of the two symmetrically arranged pulleys 131 to be different, the centers of the multiple pulleys 131 in the installation direction are not on a straight line.

[0079] Similarly, since the mounting grooves 222 correspond one-to-one and are matched in size with the pulley assemblies 13, the mounting grooves 222 also include a first mounting groove D, a second mounting groove E and a third mounting groove F, which are sequentially arranged along the installation direction of the battery pack 10, and the centers of the first mounting groove D, the second mounting groove E and the third mounting groove F are also not on a straight line.

[0080] In the case where the battery pack 10 is installed into the corresponding battery pack containing space 23, the first mounting groove D is arranged opposite to the pulley 131 of the first pulley assembly A, the second mounting groove E is arranged opposite to the pulley 131 of the second pulley assembly B, and the third mounting groove F is arranged opposite to the pulley 131 of the third pulley assembly C.

[0081] Similarly, the first mounting groove D, the second mounting groove E and the third mounting groove F each include two, two first mounting grooves D (such as first mounting grooves D1 and D2) are arranged opposite to the pulleys 131 of the two first pulley assemblies A respectively, two second mounting grooves E (such as second mounting grooves E1 and E2) are arranged opposite to the pulleys 131 of the two second pulley assemblies B respectively, and two third mounting grooves F (such as first mounting grooves F1 and F2) are arranged opposite to the pulleys 131 of the two third pulley assemblies C respectively.

[0082] Optionally, the fourth spacing d4 between the two first mounting grooves D (such as the center of the groove bottom, the opposite side wall, etc. of the first mounting groove D), the fifth spacing d5 between the two second mounting grooves E (such as the center of the groove bottom, the opposite side wall, etc. of the second mounting groove E) and the sixth spacing d6 between the two third mounting grooves F (such as the center of the groove bottom, the opposite side wall, etc. of the third mounting groove F) are all different.

[0083] In this way, by setting the spacing of the two symmetrically arranged mounting grooves 222 to be different, the centers of the multiple mounting grooves 222 in the installation direction are not on a straight line.

[0084] In the installation process of the battery pack 10, the size of the installation slot 222 and the pulley 131 of the corresponding pulley assembly 13 are matched along the installation direction of the battery pack 10, when the pulley 131 of the third pulley assembly C reaches the first installation slot D, due to the offset of the pulley 131 center of the third pulley assembly C relative to the pulley 131 center of the first pulley assembly A in the width direction of the battery pack 10, the pulley 131 of the third pulley assembly C will not be located directly above the first installation slot D, which makes the pulley 131 of the third pulley assembly C not sink into the first installation slot D. Similarly, before the pulley 131 of the third pulley assembly C slides to the third installation slot F, it will not sink into the second installation slot E; and before the pulley 131 of the second pulley assembly B slides to the second installation slot E, it will not sink into the first installation slot D.

[0085] In this way, the problem that the battery pack 10 is stuck by the installation slot 222 when the battery pack 10 is not completely pushed into the battery pack containing space 23 (for example, the first pulley assembly A is not sunk into the first installation slot D) is avoided, and it is ensured that the battery pack 10 can be smoothly and completely pushed into the battery pack containing space 23.

[0086] Please refer to Figure 3 In some embodiments, the width of the pulley 131 of the pulley assembly 13, and the difference between any two of the fourth distance d4, the fifth distance d5 and the sixth distance d6 (such as d4-d5, d5-d6, etc.) are greater than the distance between the side wall of the battery pack 10 and the supporting member 22 in the width direction (such as the distance between the side wall of the battery pack 10 (such as the side surface 112 of the box body 11) and the limiting member 225 of the supporting member 22).

[0087] It can be understood that the distance by which the battery pack 10 can move left and right is X (i.e. the distance between the side wall of the battery pack 10 and the limiting member 225 of the supporting member 22), the difference between the distances of the two symmetrical installation slots 222, and the width of the pulley 131 are greater than X, so that when the battery pack 10 is installed, even if the battery pack 10 moves left and right, at least part of the pulley 131 is supported on the track surface 221, and the pulley 131 will not sink into the non-corresponding installation slot 222.

[0088] In this way, by setting a certain distance X between the side wall of the battery pack 10 and the supporting member 22, the battery pack 10 can be smoothly installed into the battery pack containing space 23, and by reasonably setting the difference between the distances of the two symmetrical installation slots 222 and the width of the pulley 131 to be greater than X, and by arranging the centers of the pulleys 131 of the plurality of pulley assemblies 13 not to be on the same straight line along the installation direction of the box body 11, it can be ensured that during the installation of the battery pack 10 into the battery pack containing space 23, each pulley 131 will not sink into the non-corresponding installation slot 222, the smoothness of the installation of the battery pack 10 is ensured, and the installation loss of the battery pack 10 is reduced.

[0089] Please refer again to Figure 3 Optionally, the pulley assembly 13 comprises a fixing plate 132 and a pulley 131, the fixing plate 132 is fixed on the bottom surface 111 of the box 11, the fixing plate 132 is provided with a through hole 1321, the bottom surface 111 of the box 11 is provided with a pulley groove 114, the pulley groove 114 and the through hole 1321 are oppositely arranged, and the pulley 131 is arranged in the through hole 1321 and in the pulley groove 114.

[0090] In order to reduce the volume of the battery pack 10, the pulley assembly 13 can use an embedded design, the pulley groove 114 is provided on the bottom surface 111 of the box 11, then the pulley assembly 13 is fixed on the bottom surface 111 of the box 11 through the fixing plate 132, and the pulley 131 is at least partially embedded in the pulley groove 114, so that the pulley assembly 13 only partially protrudes from the pulley groove 114.

[0091] In the description of the present specification, the description of the terms "certain embodiments", "one embodiment", "some embodiments", "illustrative embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiments or examples are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily mean 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.

[0092] In addition, the terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one feature. In the description of the present application, the meaning of "multiple" is at least two, for example, two, three, unless otherwise specifically limited.

[0093] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limiting the present application, and those skilled in the art can make changes, modifications, replacements and variations to the above embodiments within the scope of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. A battery pack, characterized in that, The battery pack includes: Box; A battery module, wherein the battery module is disposed within the housing, and the battery module comprises multiple individual battery cells; and Multiple pulley assemblies are arranged sequentially on the bottom surface of the housing along the installation direction of the housing, and the centers of the pulleys of the multiple pulley assemblies are not on the same straight line along the installation direction of the housing.

2. The battery pack according to claim 1, characterized in that, The pulley assembly includes a first pulley assembly, a second pulley assembly, and a third pulley assembly. The first pulley assembly, the second pulley assembly, and the third pulley assembly are arranged sequentially along the installation direction of the housing. The line connecting the pulley centers of any two pulley assemblies is not parallel to the length direction of the housing, and the length direction is parallel to the installation direction.

3. The battery pack according to claim 2, characterized in that, The first pulley assembly, the second pulley assembly, and the third pulley assembly each include multiple components. Multiple first pulley assemblies are arranged sequentially along the width direction of the battery pack, multiple second pulley assemblies are arranged sequentially along the width direction of the battery pack, and multiple third pulley assemblies are arranged sequentially along the width direction of the battery pack. The width direction is perpendicular to the length direction.

4. The battery pack according to claim 2, characterized in that, The first pulley assembly, the second pulley assembly, and the third pulley assembly each include multiple components. In the width direction of the battery pack, multiple first pulley assemblies are symmetrically arranged at both ends of the housing, multiple second pulley assemblies are symmetrically arranged at both ends of the housing, and multiple third pulley assemblies are symmetrically arranged at both ends of the housing.

5. The battery pack according to claim 4, characterized in that, The first pulley assembly, the second pulley assembly, and the third pulley assembly also include two units. In the width direction of the battery pack, two first pulley assemblies are symmetrically arranged at both ends of the housing, two second pulley assemblies are symmetrically arranged at both ends of the housing, and two third pulley assemblies are symmetrically arranged at both ends of the housing.

6. The battery pack according to claim 4, characterized in that, In the width direction of the battery pack, the housing includes a first end and a second end opposite to each other. The distance between the center of each first pulley assembly disposed at the first end and the center of each first pulley assembly disposed at the second end is a first distance; the distance between the center of each second pulley assembly disposed at the first end and the center of each second pulley assembly disposed at the second end is a second distance; the distance between the center of each third pulley assembly disposed at the first end and the center of each third pulley assembly disposed at the second end is a third distance. The first distance, the second distance, and the third distance are different.

7. The battery pack according to any one of claims 1-6, characterized in that, The pulley assembly includes a fixed plate and a pulley. The fixed plate is fixed to the bottom surface of the box body. The fixed plate has a through hole. The bottom surface of the box body has a pulley groove. The pulley groove and the through hole are arranged opposite to each other. The pulley passes through the through hole and is disposed in the pulley groove.

8. An energy storage device, characterized in that, include: The cabinet includes multiple battery enclosure spaces; The battery pack according to any one of claims 1-7, wherein the battery pack is disposed within the housing space of the battery pack.

9. The energy storage device according to claim 8, characterized in that, The cabinet includes a bracket and a support member. The support member and the bracket are cross-connected to form multiple battery compartments. The support member extends along the installation direction of the battery pack. The track surface of the support member has an installation groove. When the battery pack is installed into the battery compartment space along the installation direction, the pulley is set in the corresponding installation groove. The installation groove and the pulley of the pulley assembly correspond one-to-one and are sized to match.

10. The energy storage device according to claim 9, characterized in that, The mounting slot includes a first mounting slot, a second mounting slot, and a third mounting slot. The first mounting slot, the second mounting slot, and the third mounting slot are arranged sequentially along the mounting direction of the battery pack, and the mounting direction of the battery pack is parallel to the length direction of the battery pack.

11. The energy storage device according to claim 10, characterized in that, The first mounting slot, the second mounting slot, and the third mounting slot each include two slots. The two first mounting slots are respectively disposed at both ends of the battery pack along the width direction. The two second mounting slots are respectively disposed at both ends of the battery pack along the width direction. The length direction is perpendicular to the width direction.

12. The energy storage device according to claim 11, characterized in that, The fourth spacing between the center bottoms of the two first mounting slots, the fifth spacing between the center bottoms of the two second mounting slots, and the sixth spacing between the center bottoms of the two third mounting slots are all different.

13. The energy storage device according to claim 12, characterized in that, The pulley width of the pulley assembly, and the difference between any two of the fourth, fifth, and sixth spacings, are all greater than the spacing between the sidewall of the battery pack and the support member in the width direction.

14. The energy storage device according to claim 10, characterized in that, The track surface of the support member is also provided with a limiting block, and the first mounting groove, the second mounting groove, the third mounting groove and the limiting block are arranged sequentially along the installation direction of the battery pack.

15. The energy storage device according to claim 9, characterized in that, When the battery pack is installed within the housing space of the battery pack, the bottom surface of the battery pack contacts the track surface of the support member.

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