Battery pack and energy storage device with same

Abstract

The utility model relates to the technical field of battery production, in particular to a battery pack and an energy storage device with the battery pack, the battery pack comprises a shell and a battery cell module, the battery cell module is arranged in the shell, the battery cell module comprises battery cells and a fixing ribbon, and at least two battery cells are sequentially arranged in the length direction of the battery cell module to form a battery cell group; and the fixed cable tie is arranged on the outer side of the battery cell group in a sleeving manner and is detachably and fixedly connected to the shell. According to the battery pack provided by the invention, the battery cell module and the shell are fixed without glue through the detachable connection of the fixing binding belt and the shell, the production and manufacturing cost of the battery pack is remarkably reduced, the connection mode of the battery cell module and the shell is simple, the disassembly and assembly are convenient, the maintenance and replacement of the battery cell module are facilitated, and the production efficiency is improved. Particularly, when a single battery cell breaks down, the whole battery pack does not need to be scrapped, so that the maintenance cost of the battery pack is obviously reduced.

Description

Technical Field

[0001] The present application relates to the field of battery production technology, and in particular to a battery pack and an energy storage device having the battery pack. Background Art

[0002] With China's vigorous promotion of new energy, new energy electric vehicles are becoming increasingly popular. The battery pack is the core energy source of new energy electric vehicles, and the battery cell is the basic unit of the battery pack, which is composed of thousands of cells.

[0003] CTP( Module-free battery packs) are directly assembled from single cells, giving CTP battery packs more space to arrange the single cells, effectively improving the space utilization and energy density of the battery pack. When assembling a CTP battery pack, adhesives are usually used to securely connect the cell group to the battery pack shell. This connection method is simple and labor-saving, but if a single cell fails, the cell group and the battery pack shell are bonded and fixed, making it impossible to separate the cell group and the battery pack to replace the failed single cell. Consequently, the battery pack cannot continue to function normally, increasing the production and maintenance costs of the battery pack for manufacturers and consumers.

[0004] In view of this, this application is filed. Utility Model Content

[0005] The present application provides a battery pack and an energy storage device having the battery pack, so as to solve the problem of how to reduce the production cost and maintenance cost of the battery pack.

[0006] In one aspect, the present application provides a battery pack, comprising:

[0007] case;

[0008] A battery cell module, the battery cell module is arranged in the housing, and the battery cell module includes:

[0009] Battery cells, at least two of which are arranged in sequence along the length direction of the battery cell module to form a battery cell group;

[0010] A fixing tie is sleeved on the outside of the battery cell group and is detachably fixedly connected to the shell.

[0011] In some embodiments, the battery cell module further includes end plates and connecting straps, wherein the two end plates are oppositely arranged at both ends of the battery cell group along the length direction, and the connecting straps are sleeved on the outside of the battery cell group and the end plates along the height direction of the battery cell module;

[0012] The fixing strap includes a first strap and / or a second strap, the first strap and the connecting strap are arranged alternately, and / or the second strap and the connecting strap are arranged at intervals along the height direction.

[0013] In some embodiments, the fixing strap includes a first strap that is sleeved on the outside of the battery cell group and the end plate along the length direction, the first strap, the end plate and the shell are respectively provided with a first fixing hole for a first fastener to pass through, and the intersection of the first strap and the connecting strap is respectively provided with a connecting hole for a connecting member to pass through.

[0014] In some embodiments, the end plate includes a plate body extending along the height direction, and one end of the plate body along the length direction extends in a direction away from the battery cell module to form a plate wall;

[0015] The first cable tie includes a first belt body arranged on the battery cell group and extending along the length direction and an L-shaped bracket connecting the first belt body, at least two of the L-shaped brackets are arranged at intervals along the thickness direction of the battery cell module, the long sides of the L-shaped brackets are staggered with the connecting cable ties and are respectively provided with the connecting holes, and the short sides of the L-shaped brackets, the board wall and the shell are respectively provided with the first fixing holes.

[0016] In some embodiments, the fixing strap comprises a first strap and a second strap arranged alternately, the first strap is sleeved on the outer sides of the battery cell group and the end plate along the length direction, and the second strap and the connecting strap are spaced apart along the height direction;

[0017] The first strap, the end plate and the housing are respectively provided with first fixing holes for a first fastener to pass through, and the second strap and the housing are respectively provided with second fixing holes for a second fastener to pass through.

[0018] In some embodiments, at least two of the first cable ties are spaced apart along the thickness direction of the battery cell module.

[0019] In some embodiments, the end plate includes a plate body extending along the height direction, and one end of the plate body along the length direction extends in a direction away from the battery cell module to form a plate wall;

[0020] The first strap includes a U-shaped strap that is sleeved on the outside of the battery cell group and the plate along the length direction and is staggered with the connecting strap. The two open ends of the U-shaped strap extend in a direction away from the battery cell module to form a strap wall. The strap wall, the plate wall and the shell are respectively provided with the first fixing hole.

[0021] In some embodiments, the second cable tie comprises:

[0022] a frame-shaped belt body, the frame-shaped belt body being sleeved on the outer sides of the battery cell group and the end plate along the height direction and being spaced apart from the connecting tie along the height direction;

[0023] A frame wall extends outward from the frame-shaped belt body, and the frame wall and the shell are respectively provided with the second fixing hole.

[0024] In some embodiments, a bottom guard plate is provided between the battery cell group and the shell, and the fixing strap, the bottom guard plate and the shell are detachably fixedly connected.

[0025] On the other hand, the present application also provides an energy storage device having any of the battery packs described above.

[0026] After adopting the above technical solution, the present application has the following beneficial effects compared with the prior art.

[0027] 1. The battery pack in this application is detachably connected to the shell by fixing cable ties. The connection method between the battery cell module and the shell is simple, and disassembly and assembly are convenient, which is conducive to the maintenance and replacement of the battery cell module. In particular, when a single battery cell fails, there is no need to scrap the entire battery pack, which significantly reduces the maintenance cost of the battery pack.

[0028] 2. The battery pack in the present application is detachably connected to the shell by fixing the cable tie. During the production and manufacturing process of the battery pack, there is no need to apply adhesive between the battery module and the shell to fix the two together, thereby realizing glue-free fixation of the battery module and the shell, simplifying the assembly process of the battery pack, improving the assembly efficiency of the battery pack, and reducing the production and manufacturing cost of the battery pack.

[0029] 3. The energy storage device in this application includes the battery pack in this application, and therefore also includes all the above advantages of the battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is an assembly diagram of a module unit in this application;

[0031] Figure 2 This is a schematic structural diagram of a module unit in this application;

[0032] Figure 3 This is a connection diagram of a module unit and a second cable tie in this application;

[0033] Figure 4 This is a connection diagram of a module unit, a first cable tie, and a second cable tie in this application;

[0034] Figure 5This is an assembly diagram of a battery pack in this application;

[0035] Figure 6 This is a schematic structural diagram of a first cable tie in this application;

[0036] Figure 7 This is a schematic structural diagram of a second cable tie in this application;

[0037] Figure 8 It is a structural schematic diagram of an end plate in this application;

[0038] Figure 9 This is an assembly diagram of another module unit in this application;

[0039] Figure 10 It is a structural diagram of another module unit in this application;

[0040] Figure 11 This is a connection diagram of another module unit and a second cable tie in this application;

[0041] Figure 12 This is a connection diagram of another module unit, a first cable tie, and a second cable tie in this application;

[0042] Figure 13 is an assembly diagram of another battery pack in this application;

[0043] Figure 14 This is an assembly diagram of another battery pack in this application;

[0044] Figure 15 This is a schematic structural diagram of another battery pack in this application;

[0045] Figure 16 This is a structural diagram of another first cable tie in the present application;

[0046] Figure 17 This is a structural diagram of another connecting tie in the present application.

[0047] In the figure: 100, battery pack; 10, housing; 11, first fixing hole; 12, second fixing hole; 13, third fixing hole; 14, receiving slot; 20, battery cell module; 21, module unit; 211, battery cell group; 2111, battery cell; 212, end plate; 2121, plate body; 2122, plate wall; 2123, first fixing hole; 2124, third fixing hole; 2125, connection hole; 2126 , fixing groove; 213, connecting tie; 2131, connecting hole; 22, first tie; 221, first belt body; 222, L-shaped bracket; 2221, long side; 2222, short side; 223, U-shaped belt body; 224, belt body wall; 225, first fixing hole; 226, connecting hole; 23, second tie; 231, frame-type belt body; 232, frame body wall; 233, second fixing hole; 30, bottom guard plate. DETAILED DESCRIPTION

[0048] The following will clearly and completely describe the technical solutions of this application in conjunction with the embodiments. Obviously, the embodiments described are only part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0049] In the embodiment of the present application, a battery pack 100 is provided, which is applied to an energy storage device. The energy storage device can be a device with a battery replacement function such as a vehicle or an operating machine. For the specific structure of the battery pack 100, please refer to Figures 1 to 17 It includes a shell 10 and a battery module 20, and the battery module 20 is arranged in the shell 10, wherein the battery module 20 includes a battery cell 2111 and a fixing tie, at least two battery cells 2111 are arranged in sequence along the length direction of the battery module 20 to form a battery cell group 211, and the fixing tie is sleeved on the outside of the battery cell group 211 and is detachably fixed to the shell 10.

[0050] According to the battery pack 100 of the application, the connection between the battery cell module 20 and the shell 10 is detachable through the fixed cable tie, and the disassembly and assembly are convenient, which is conducive to the maintenance and replacement of the battery cell module 20. In particular, when a single battery cell 2111 fails, there is no need to scrap the entire battery pack 100, which significantly reduces the maintenance cost of the battery pack 100. Moreover, during the production and manufacturing process of the battery pack 100, there is no need to apply adhesive between the battery cell module 20 and the shell 10 to fix the two together, so that the battery cell module 20 and the shell 10 are fixed without glue, which simplifies the assembly process of the battery pack 100, improves the assembly efficiency of the battery pack 100, and reduces the production and manufacturing cost of the battery pack 100.

[0051] like Figures 1 to 5 、 Figures 9 to 15As shown, the battery module 20 also includes end plates 212 and connecting ties 213. The two end plates 212 are relatively arranged at the two ends of the battery cell group 211 along the length direction of the battery cell module 20. The connecting ties 213 are sleeved on the outside of the battery cell group 211 and the end plates 212 along the height direction of the battery cell module 20. The connecting ties 213 bundle the battery cell group 211 and the two end plates 212 so that the battery cell group 211 is clamped between the two end plates 212. The battery cell group 211, the two end plates 212 and the connecting ties 213 form a module unit 21, thereby improving the reliability of the battery pack 100.

[0052] In order to prevent the connecting strap 213 from shifting after the binding is completed, causing the binding to be unstable, as shown in the following figure: Figures 1 to 5 、 Figures 9 to 15 As shown, a fixing groove 2126 for fixing the connecting tie 213 is provided on the end plate 212 , and at least two fixing grooves 2126 are provided on the end plate 212 . The at least two fixing grooves 2126 are spaced apart along the height direction of the battery cell module 20 , further improving the stability of the module unit 21 .

[0053] like Figures 3 to 5 and Figure 11 and Figure 13 As shown, a bottom guard plate 30 is provided between the battery cell group 211 and the shell 10, and the fixing tie, the bottom guard plate 30 and the shell 10 are detachably fixedly connected. A gap is left between the bottom guard plate 30 and the battery cell module 20 for cooling air to pass through. By arranging the bottom guard plate 30 at the bottom of the battery cell module 20, not only the battery cell module 20 can be supported, but also the contact area between the cold air and the battery cell module 20 can be increased, which enhances the heat dissipation of the heating battery cell 2111. At the same time, the fixing tie, the bottom guard plate 30 and the shell 10 are detachably fixedly connected, which is beneficial to the maintenance and replacement of the battery cell module 20.

[0054] like Figures 1 to 5 、 Figures 9 to 15 As shown, as an optional embodiment, the fixing tie includes a first tie 22 and a second tie 23, the first tie 22 and the connecting tie 213 are staggered, and the second tie 23 and the connecting tie 213 are spaced apart along the height direction of the battery cell module 20. On the basis of the module unit 21, the battery cell group 211 and the two end plates 212 are respectively bundled by the first tie 22 and the second tie 23, and the first tie 22 and the connecting tie 213 are staggered to achieve multi-dimensional bundling of the battery cell group 211 and the two end plates 212, thereby further improving the stability of the battery cell module 20.

[0055] like Figures 3 to 5 、 Figures 11 to 13As shown, the first tie 22 is sleeved on the outside of the cell group 211 and the end plate 212 along the length direction of the cell module 20, and the second tie 23 and the connecting tie 213 are spaced apart along the height direction of the cell module 20. The cell group 211 and the two end plates 212 are bundled along the X, Y and Z directions by the first tie 22 and the second tie 23 to ensure that adjacent cell 2111 are closely arranged to form a compactly arranged cell group 211, which can not only enhance the stability of the entire cell module 20, but also improve the space utilization and energy density of the battery pack 100.

[0056] like Figures 3 to 5 、 Figures 11 to 13 As shown, the connecting tie 213 is arranged above the second tie 23, the connecting tie 213 is sleeved on the outer upper part of the battery cell group 211 and the two end plates 212, and the second tie 23 is sleeved on the outer lower part of the battery cell group 211 and the two end plates 212. The upper and lower parts of the battery cell group 211 are constrained by the connecting tie 213 and the second tie 23, which has a good limiting effect on the battery cell group 211, thereby restraining the battery cell group 211 along the height direction of the battery cell module 20.

[0057] like Figure 5 and Figure 13 As shown, the first tie 22, the end plate 212 and the shell 10 are respectively provided with first fixing holes 225, 2123, and 11 for the first fastener (not shown in the figure) to pass through, and the second tie 23 and the shell 10 are respectively provided with second fixing holes 233 and 12 for the second fastener (not shown in the figure) to pass through, thereby realizing a detachable fixed connection between the first tie 22, the end plate 212 and the shell 10, and a detachable fixed connection between the second tie 23 and the shell 10. The connection method is simple, which simplifies the assembly process of the battery pack 100 and improves the assembly efficiency of the battery pack 100. At the same time, disassembly and assembly are convenient, which is conducive to the maintenance and replacement of the battery cell module 20.

[0058] In order to improve the binding force of the battery cell group 211 along the length direction of the battery cell module 20, so that the multiple battery cells 2111 are compactly arranged along the length direction of the battery cell module 20, such as Figures 1 to 17 As shown, at least two first cable ties 22 are spaced apart along the thickness direction of the battery cell module 20 , which can prevent the battery cell group 211 from loosening and deforming, so that the space of the battery pack 100 is reasonably utilized.

[0059] For the specific structure of the end plate 212, please refer to Figures 1 to 5 、 Figure 8 and Figures 9 to 13It includes a plate body 2121 extending along the height direction of the battery cell module 20, and one end of the plate body 2121 along the length direction of the battery cell module 20 extends in a direction away from the battery cell module 20 to form a plate wall 2122, which is used for detachable fixed connection with the first tie 22, the bottom guard plate 30 and the shell 10.

[0060] like Figure 5 、 Figure 8 and Figure 13 As shown, the plate body 2121 and the shell 10 are provided with third fixing holes 2124, 13 for the third fastener (not shown in the figure) to pass through, and the corresponding position of the shell 10 is provided with a first fixing hole (not shown in the figure) for the first fastener to pass through, a second fixing hole (not shown in the figure) for the second fastener to pass through, and a third fixing hole (not shown in the figure) for the third fastener to pass through is provided at the corresponding position of the bottom guard plate 30, so as to realize the detachable fixed connection of the first tie 22, the end plate 212, the bottom guard plate 30 and the shell 10, the detachable fixed connection of the second tie 23, the bottom guard plate 30 and the shell 10, and the detachable fixed connection of the end plate 212, the bottom guard plate 30 and the shell 10.

[0061] For the specific structure of the first cable tie 22, please refer to Figure 4 、 Figure 5 、 Figure 6 、 Figure 12 and Figure 13 It includes a U-shaped belt body 223 that is sleeved on the outside of the battery cell group 211 and the plate body 2121 along the length direction of the battery cell module 20 and is staggered with the connecting tie 213. The two open ends of the U-shaped belt body 223 extend in the direction away from the battery cell module 20 to form a belt body wall 224. The belt body wall 224, the plate wall 2122 and the shell 10 are respectively provided with first fixing holes 225, 2123, and 11, so that the first fastener can fasten the first tie 22, the end plate 212, the bottom guard plate 30 and the shell 10.

[0062] like Figure 4 、 Figure 5 、 Figure 6 、 Figure 12 and Figure 13 As shown, the two belt walls 224 are arranged opposite to each other along the length direction of the battery cell module 20 and extend in a direction away from the battery cell group 211 , thereby constraining the battery cell group 211 along the length direction of the battery cell module 20 .

[0063] For the specific structure of the second cable tie 23, please refer to Figures 3 to 5 、 Figure 7 and Figures 11 to 13It includes a frame-shaped belt body 231 and a frame wall 232, wherein the frame-shaped belt body 231 is sleeved on the outside of the battery cell group 211 and the plate body 2121 along the height direction of the battery cell module 20 and is spaced apart from the connecting tie 213 along the height direction of the battery cell module 20, thereby realizing secondary restraint of the battery cell group 211 along the height direction of the battery cell module 20; the frame wall 232 extends outward from the frame-shaped belt body 231, and the frame wall 232 and the shell 10 are respectively provided with second fixing holes 233 and 12, so that the second fastener can fasten the second tie 23, the bottom guard plate 30 and the shell 10.

[0064] like Figures 3 to 5 、 Figure 7 and Figures 11 to 13 As shown, the two frame walls 232 are arranged opposite to each other along the thickness direction of the battery cell module 20 and extend in a direction away from the battery cell group 211 , thereby constraining the battery cell group 211 along the thickness direction of the battery cell module 20 .

[0065] like Figures 1 to 5 As shown, it involves the assembly process of the blade battery pack 100, and as Figures 9 to 13 As shown, the assembly process of the square battery pack 100 is involved. In the blade battery pack 100 and the square battery pack 100, the structures of the first tie 22, the second tie 23 and the connecting tie 213 involved in the two are the same, and there are only differences in length and thickness dimensions.

[0066] The following describes an assembly process of the battery pack 100 according to an embodiment of the present application with reference to the accompanying drawings.

[0067] like Figures 1 to 5 and Figures 9 to 13As shown, multiple battery cells 2111 are arranged in sequence along the length direction of the battery cell module 20, and two end plates 212 are provided at both ends of the battery cell group 211 along the length direction of the battery cell module 20, so that the battery cell group 211 is clamped between the two end plates 212, and the connecting tie 213 is sleeved on the outside of the battery cell group 211 and the two end plates 212 along the height direction of the battery cell module 20, thereby forming a module unit 21, and then the second tie 23 is sleeved on the outside of the battery cell group 211 and the two end plates 212 along the height direction of the battery cell module 20, so that the connecting tie 213 and the second tie 23 are spaced apart along the height direction of the battery cell module 20, and then the first tie 22 is sleeved along the height direction of the battery cell module 20 The length direction of the battery cell module 20 is sleeved on the outside of the battery cell group 211 and the end plate 212, so that the first tie 22 is staggered with the connecting tie 213 and the second tie 23 to form the battery cell module 20. Finally, the battery cell module 20 and the bottom guard plate 30 are arranged in sequence in the shell 10 along the height direction of the battery cell module 20. The first fastener detachably fixes the first tie 22, the end plate 212, the bottom guard plate 30 and the shell 10, the second fastener detachably fixes the second tie 23, the bottom guard plate 30 and the shell 10, and the third fastener detachably fixes the end plate 212, the bottom guard plate 30 and the shell 10 to form the battery pack 100.

[0068] like Figures 14 to 17 As shown, as an optional embodiment, the fixing tie includes a first tie 22, and the first tie 22 and the connecting tie 213 are arranged alternately. The first tie 22 is sleeved on the outside of the battery cell group 211 and the end plate 212 along the length direction of the battery cell module 20. The first tie 22, the end plate 212 and the shell 10 are respectively provided with first fixing holes 225, 2123, and 11 for the first fastener to pass through, so as to realize a detachable fixed connection between the first tie 22, the end plate 212 and the shell 10. The connection method is simple, the assembly operation of the battery pack 100 is labor-saving, and it is convenient to disassemble and assemble the battery pack 100.

[0069] like Figure 14 、 Figure 15 and Figure 17 As shown, the intersection of the first strap 22 and the connecting strap 213 is respectively provided with connection holes 226 and 2131 for the connection piece (not shown in the figure) to pass through, and the relative position of the end plate 212 is provided with a connection hole 2125 for the connection piece to pass through, so as to realize the restraint of the battery cell group 211 along the height direction of the battery cell module 20.

[0070] For the specific structure of the end plate 212, please refer to Figure 14 and Figure 15It includes a plate body 2121 extending along the height direction of the battery cell module 20, wherein one end of the plate body 2121 along the length direction of the battery cell module 20 extends in a direction away from the battery cell module 20 to form a plate wall 2122, which is used for detachable fixed connection with the first tie 22, the bottom guard plate 30 and the shell 10.

[0071] like Figure 14 and Figure 15 As shown, the plate body 2121 and the shell 10 are provided with third fixing holes 2124, 13 for the third fastener (not shown in the figure) to pass through, and the corresponding position of the shell 10 is provided with a first fixing hole (not shown in the figure) for the first fastener to pass through and a third fixing hole (not shown in the figure) for the third fastener to pass through, thereby realizing the detachable fixed connection of the first tie 22, the end plate 212, the bottom guard plate 30 and the shell 10, and realizing the detachable fixed connection of the end plate 212, the bottom guard plate 30 and the shell 10.

[0072] For the specific structure of the first cable tie 22, please refer to Figure 14 、 Figure 15 and Figure 17 , which includes a first belt body 221 arranged on the battery cell group 211 and extending along the length direction of the battery cell module 20 and an L-shaped bracket 222 connecting the first belt body 221, wherein at least two L-shaped brackets 222 are arranged at intervals along the thickness direction of the battery cell module 20, and the long sides 2221 of the L-shaped bracket 222 are staggered with the connecting tie 213 and are respectively provided with connecting holes 226 and 2131, and the short sides 2222 of the L-shaped bracket 222, the plate wall 2122 and the shell 10 are respectively provided with first fixing holes 225, 2123, and 11, which can realize the detachable fixed connection of the first tie 22, the end plate 212, the bottom guard plate 30 and the shell 10, and can also realize the restraint of the battery cell group 211 along the height direction of the battery cell module 20. At the same time, the two L-shaped brackets 222 are arranged at intervals along the thickness direction of the battery cell module 20 to restrain the battery cell group 211 along the length direction of the battery cell module 20.

[0073] like Figure 14 As shown, the shell 10 is provided with a downwardly concave and upwardly open receiving groove 14, and the battery cell module 20 is installed in the receiving groove 14. The bottom of the receiving groove 14 is provided with a first fixing hole 11 for a first fastener to pass through and a third fixing hole 13 for a third fastener to pass through, so that the first tie 22, the end plate 212 and the shell 10 are detachably fixedly connected, and the end plate 212 and the shell 10 are detachably fixedly connected.

[0074] The following describes an assembly process of the battery pack 100 according to an embodiment of the present application with reference to the accompanying drawings.

[0075] like Figure 14 and Figure 15 As shown, multiple battery cells 2111 are arranged in sequence along the length direction of the battery cell module 20, and two end plates 212 are provided at both ends of the battery cell group 211 along the length direction of the battery cell module 20, so that the battery cell group 211 is clamped between the two end plates 212, and the connecting tie 213 is sleeved on the outside of the battery cell group 211 and the two end plates 212 along the height direction of the battery cell module 20, thereby forming a module unit 21, and then the first tie 22 is sleeved on the battery cell group 211 and the end plates along the length direction of the battery cell module 20. The outer side of the plate 212 is arranged so that the first tie 22, the connecting tie 213 and the second tie 23 are arranged alternately, and the connecting piece detachably fixes the first tie 22, the connecting tie 213 and the end plate 212 to form a battery module 20. Finally, the battery module 20 is set in the accommodating groove 14, and the first fastener detachably fixes the first tie 22, the end plate 212 and the shell 10 to form a battery pack 100.

[0076] An energy storage device is also provided in an embodiment of the present application. The energy storage device can be a device with a battery replacement function such as a vehicle or an operating machine. It has the battery pack 100 in the above embodiment and also includes all the advantages of the battery pack 100, which will not be repeated here.

[0077] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0078] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. Throughout the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0079] In this application, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0080] In this application, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples without contradiction.

[0081] 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 limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A battery pack, characterized in that: include: case; A battery cell module, wherein the battery cell module is arranged in the housing, and the battery cell module comprises: Battery cells, at least two of which are arranged in sequence along the length direction of the battery cell module to form a battery cell group; A fixing tie is sleeved on the outside of the battery cell group and is detachably fixedly connected to the shell.

2. The battery pack according to claim 1, characterized in that: The battery module further includes an end plate and a connecting tie, wherein the two end plates are arranged oppositely at the two ends of the battery group along the length direction, and the connecting tie is sleeved on the outer sides of the battery group and the end plate along the height direction of the battery module; The fixing strap comprises a first strap and / or a second strap, the first strap and the connecting strap are arranged alternately, and / or the second strap and the connecting strap are arranged at intervals along the height direction.

3. The battery pack according to claim 2, characterized in that: The fixing strap comprises a first strap sleeved on the outer sides of the battery cell group and the end plate along the length direction, the first strap, the end plate and the shell are respectively provided with first fixing holes for the first fastener to pass through, and the intersection of the first strap and the connecting strap are respectively provided with connecting holes for the connecting member to pass through.

4. The battery pack according to claim 3, characterized in that: The end plate comprises a plate body extending along the height direction, and one end of the plate body along the length direction extends in a direction away from the battery module to form a plate wall; The first strap comprises a first strap body arranged on the battery cell group and extending along the length direction and an L-shaped bracket connecting the first strap body, at least two of the L-shaped brackets are arranged at intervals along the thickness direction of the battery cell module, the long sides of the L-shaped brackets are staggered with the connecting straps and are respectively provided with the connecting holes, and the short sides of the L-shaped brackets, the board wall and the shell are respectively provided with the first fixing holes.

5. The battery pack according to claim 2, characterized in that: The fixing strap comprises a first strap and a second strap that are alternately arranged, the first strap is sleeved on the outer sides of the battery cell group and the end plate along the length direction, and the second strap and the connecting strap are spaced apart along the height direction; The first strap, the end plate and the housing are respectively provided with first fixing holes for a first fastener to pass through, and the second strap and the housing are respectively provided with second fixing holes for a second fastener to pass through.

6. The battery pack according to claim 5, characterized in that: At least two of the first cable ties are spaced apart along the thickness direction of the battery core module.

7. The battery pack according to claim 5, characterized in that: The end plate comprises a plate body extending along the height direction, and one end of the plate body along the length direction extends in a direction away from the battery module to form a plate wall; The first strap comprises a U-shaped strap which is sleeved on the outer sides of the battery cell group and the plate body along the length direction and staggered with the connecting strap, and the two open ends of the U-shaped strap extend in the direction away from the battery cell module to form a strap wall, and the strap wall, the plate wall and the shell are respectively provided with the first fixing holes.

8. The battery pack according to claim 5, characterized in that: The second cable tie comprises: A frame-shaped belt body, wherein the frame-shaped belt body is sleeved on the outer sides of the battery cell group and the end plate along the height direction and is spaced apart from the connecting tie along the height direction; A frame wall extends outward from the frame-shaped belt body, and the frame wall and the shell are respectively provided with the second fixing hole.

9. The battery pack according to any one of claims 1 to 8, characterized in that: A bottom guard plate is arranged between the battery cell group and the shell, and the fixing strap, the bottom guard plate and the shell are detachably fixedly connected.

10. An energy storage device, characterized in that: A battery pack according to any one of claims 1 to 9.

Images