Battery pack

Abstract

Battery pack characterized by the fact that it comprises: a housing (10) in which a mounting space (101) is arranged; a cell assembly (20) which is fixed in the assembly space (101), wherein the cell assembly (20) comprises several rows of cell groups (21), wherein adjacent two rows of cell groups (21) are separated from each other by a separating element (41), wherein the cell groups (21) each comprise several cells (201), and wherein adjacent two cells (201) are fixed by a first adhesive element (42); a fastening assembly attached to the mounting space (101), wherein the fastening assembly comprises a first end plate (31) and a second end plate (32), wherein the first end plate (31) and the second end plate (32) are each connected longitudinally at the two ends of the cell assembly (20), and wherein the first end plate (31) and the second end plate (32) serve to fasten at least several rows of the cell groups (21).

Description

TECHNICAL AREA

[0001] The present application relates to the field of battery technology, in particular a battery pack. BACKGROUND TECHNOLOGY

[0002] In the current stage of manufacturing most battery packs, several cells are first assembled into a battery module. After the addition of side plates, end plates, and other components, the battery module is then installed in a housing to form a battery pack. Battery packs manufactured in this way require each battery module to have its own side plates and end plates, resulting in high manufacturing costs. DISCLOSURE OF THE USE PATTERN

[0003] The main objective of the present application is to provide a battery pack in order to at least solve the problem of the high manufacturing costs of the battery pack in the existing technology.

[0004] According to one aspect of the present application, a battery pack is provided which includes: a housing in which an assembly space is arranged; a cell assembly which is fixed in the assembly space, wherein the cell assembly comprises several rows of cell groups, wherein adjacent two rows of cell groups are separated from each other by a separating element, wherein the cell groups each comprise several cells, and wherein adjacent two cells are fixed by a first adhesive element; a fastening assembly attached to the mounting space, wherein the fastening assembly comprises a first end plate and a second end plate, wherein the first end plate and the second end plate are each connected longitudinally at the two ends of the cell assembly, and wherein the first end plate and the second end plate serve to fasten at least several rows of the cell groups.

[0005] In some embodiments, the cell assembly further comprises a connecting component and an insulating cover, wherein the connecting component is attached to the top of the cell assembly and the insulating cover is attached to the top of the connecting component; wherein one of the connecting component and the insulating cover is provided with a locking groove, and the other of the two is provided with a locking lug that fits the locking groove, the locking lug being engaged in the locking groove to secure the insulating cover to the connecting component.

[0006] In some embodiments, the battery pack further comprises a first fastening element, wherein the first fastening element is successively passed through the insulating cover and the connecting component to fasten the insulating cover to the connecting component.

[0007] In some embodiments, the fastening assembly further comprises a first adhesive plate and a second adhesive plate; wherein the first adhesive plate is bonded between the first end plate and the cell assembly and the second adhesive plate is bonded between the second end plate and the cell assembly, wherein the first adhesive plate and the second adhesive plate each extend in the vertical direction of the battery pack and each are attached to two opposite side walls of the insulating cover.

[0008] In some embodiments, the connecting component is provided with a first protruding tab on a side that is close to the first end plate; wherein a projection is arranged on the first end plate in which a through hole is provided, and the first projection tab is inserted into the through hole; wherein the battery pack further comprises a second fastening element which is successively passed through the projection and the first projection tab to fasten the first projection tab to the projection.

[0009] In some embodiments, the battery pack further comprises a mounting plate and a third fastening element, wherein the third fastening element extends through a first end of the mounting plate and is connected to an inner wall surface of the housing, and a second end of the mounting plate is attached to the first end plate.

[0010] In some embodiments, a first connection hole is provided in the first end plate in the vertical direction of the battery pack, and a second connection hole is provided in a base of the mounting space, which fits the first connection hole; wherein the battery pack further comprises a fourth fastening element which is successively passed through the second end of the mounting plate, the first connecting hole and the second connecting hole to fasten the second end of the mounting plate to the first end plate and to secure the first end plate in the mounting space.

[0011] In some embodiments, the second end plate is provided with a second projecting tab that extends in one direction away from the cell assembly; wherein the battery pack further comprises a fifth fastening element which is successively passed through the second protruding tab and an inner wall surface of the housing to secure the second end plate in the mounting space.

[0012] In some embodiments, the battery pack further comprises a second adhesive element that is arranged between the underside of the cell assembly and an inner wall surface of the housing to secure the cell assembly in the mounting space.

[0013] In some embodiments, the separating element comprises a first epoxy plate; and / or the first adhesive element comprises foam; and / or The second adhesive element comprises a second epoxy plate.

[0014] In contrast to related technology, in the present application only a first end plate and a second end plate need to be arranged on the outside of the cell assembly, and it is not necessary to arrange side plates on all sides of the cell assembly, which results in the structure of the battery pack according to the present application being simpler compared to the structure of the battery pack of existing technology, and the manufacturing costs of the battery pack can be reduced to a certain extent. DESCRIPTION OF THE DRAWINGS

[0015] The drawings described herein serve to further understand the present application and form part of the present application. The schematic embodiments of the present application and their descriptions serve to illustrate the present application and do not constitute an inadmissible limitation of the present application. Fig. Figure 1 is an exploded view of a battery pack according to the present application. Fig. 2 is a structural view of area I from Fig. 1. Fig. Figure 3 is an exploded view of a cell assembly according to the present application. Fig. Figure 4 is a structural view of the cell assembly according to the present application. Fig. 5 is an enlarged structural view of area II from Fig. 4. Fig. Figure 6 is an enlarged structural view of area III from Fig. 5. Fig. Figure 7 is a structural view of a cell group according to the present application. Fig. Figure 8 is a structural view of an insulating cover according to the present application. Drawing designations:

[0016] 10, Housing; 11, Main body; 12, Cover body; 20, Cell assembly; 21, Cell group; 22, Connecting component; 23, Insulating cover; 31, First end plate; 32, Second end plate; 33, First adhesive plate; 34, Second adhesive plate; 41, Separating element; 42, First adhesive element; 43, Second adhesive element; 51, First fastening element; 52, Second fastening element; 53, Third fastening element; 54, Fourth fastening element; 55, Fifth fastening element; 56, Sixth fastening element; 60, Mounting plate; 101, Mounting space; 111, First connecting part; 112, Second connecting part; 113, Second connecting hole; 114, Second mounting hole; 115, Sealing groove; 121, First mounting hole; 201, Cell; 211, First weld point; 221, first protruding tab; 222, locking lug; 223, limiting edge; 224, second weld point; 231, locking groove; 311, protrusion; 312, through hole; 313, first connecting hole; 321, second protruding tab. DETAILED DESIGNS

[0017] It should be noted that the embodiments and features of the embodiments in this application can be combined with one another, provided no conflicts arise. The present application is explained in detail below with reference to drawings and embodiments.

[0018] It should be noted that the terms used here serve only to describe specific embodiments and not to limit the exemplary embodiments according to the present application. As used here, the singular form is intended to include the plural form unless expressly stated otherwise in the context. Furthermore, it should be understood that the terms "comprise" and / or "include," when used in this description, indicate the presence of features, steps, operations, parts, components, and / or combinations thereof.

[0019] Unless expressly stated otherwise, the relative arrangements, numerical expressions, and values ​​of the components and steps described in these exemplary embodiments do not limit the scope of this application. It is understood that the dimensions of the individual parts in the accompanying drawings are not shown to scale for the sake of clarity. Techniques, methods, and devices known to a person skilled in the art in the relevant field may not be explained in detail but should be considered part of the description of the invention under appropriate circumstances. In all the examples shown and discussed herein, each specific value is to be understood merely as an example and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values.It should be noted that similar symbols and letters in the following drawings denote similar elements, so that an element defined in one drawing does not need to be further explained in subsequent drawings.

[0020] With reference to the Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6, Fig. 7 to Fig. 8 According to an embodiment of the present application, a battery pack is provided comprising a housing 10, a cell assembly 20 and a mounting assembly.

[0021] In the housing 10, a mounting space 101 is arranged, and the cell assembly 20 is mounted in the mounting space 101. The cell assembly 20 comprises several rows of cell groups 21, with adjacent two rows of cell groups 21 being separated from each other by a separating element 41. Each cell group 21 comprises several cells 201, with adjacent two cells 201 being fastened by a first adhesive element 42. The mounting assembly is attached to the mounting space 101 and comprises a first end plate 31 and a second end plate 32, the first end plate 31 and the second end plate 32 being connected longitudinally at the two ends of the cell assembly 20, the first end plate 31 and the second end plate 32 serving to fasten at least several rows of the cell groups 21.

[0022] In this embodiment, two adjacent rows of cell groups 21 are separated from each other by a separating element 41, while two adjacent cells 201 are fastened by a first adhesive element 42. Simultaneously, the first end plate 31 is arranged at one end of the cell assembly 20 and serves to fasten one end of several rows of cell groups 21, and the second end plate 32 is arranged at an end of the cell assembly 20 remote from the first end plate 31 and serves to fasten several rows of cell groups 21, thus improving the fastening effect of the cell assembly 20. Furthermore, the fastening assembly is installed in the mounting space 101, and when the first end plate 31 and the second end plate 32 are connected to the cell assembly 20, they can, to a certain extent, improve the stability of the connection between the cell assembly 20 and the housing 10.

[0023] Compared to a battery pack in related technology where side plates are arranged in the vicinity of the cell assembly 20, the cell assembly 20 according to this embodiment of the present application requires only the first end plate 31 and the second end plate 32 in its vicinity. The structure of the battery pack according to this embodiment of the present application is simpler compared to the structure of the battery pack in related technology and can reduce the manufacturing costs of the battery pack to a certain extent.

[0024] With regard to the Fig. 3 and Fig. In some embodiments, the cell assembly 20 further comprises a connecting component 22 and an insulating cover 23, wherein the connecting component 22 is attached to the top surface of the cell assembly 20 and the insulating cover 23 is attached to the top surface of the connecting component 22. One of the connecting component 22 and the insulating cover 23 is provided with a locking groove 231, and the other of the two is provided with a locking lug 222 that fits into the locking groove 231, the locking lug 222 being engaged in the locking groove 231 to attach the insulating cover 23 to the connecting component 22.

[0025] In particular, the connecting component 22 includes a circuit protection board. The circuit protection board serves to combine the current flow of the individual cells 201 and to protect the individual cells 201, while also providing some attachment to the top of the individual cell groups 21. The insulating cover 23 serves to shield and insulate the circuit protection board from the external environment to prevent damage to the circuit protection board or the cells 201 from the external environment. In one example, the cell assembly 20 comprises two rows of cell groups 21, and the circuit protection board is arranged over the top of the two rows of cell groups 21. The circuit protection board is provided with several locking slots 231, while the insulating cover 23 is provided with several locking tabs 222.The insulating cover 23 is attached to the circuit protection board by snapping the multiple locking tabs 222 into the multiple locking slots 231 on the circuit protection board.

[0026] It is understood that the separating element 41 can also have a fastening function, i.e., the separating element 41 is provided with a double-sided adhesive in order to fasten adjacent two rows of cell groups 21 and thereby improve the connection stability of adjacent two rows of cell groups 21.

[0027] Furthermore, to strengthen the connection force between the insulating cover 23 and the connecting component 22, the battery pack in this embodiment also includes a first fastening element 51, wherein the first fastening element 51 passes sequentially through the insulating cover 23 and the connecting component 22 to fasten the insulating cover 23 to the connecting component 22. In this embodiment, the first fastening element 51 is a plastic screw to prevent damage to the circuit protection board when connecting with metal screws, and to simultaneously prevent the transfer of current to the circuit protection board via other conductive components through the metal screws, which could damage the circuit protection board or the cells 201.

[0028] As in Fig. As shown in Figure 1, the fastening assembly further comprises a first adhesive plate 33 and a second adhesive plate 34, wherein the first adhesive plate 33 is bonded between the first end plate 31 and the cell assembly 20 and the second adhesive plate 34 is bonded between the second end plate 32 and the cell assembly 20, and the first adhesive plate 33 and the second adhesive plate 34 are both aligned in the vertical direction of the battery pack (e.g. the Z-direction in Fig. 1) run and are each attached to two opposite side walls of the insulating cover 23.

[0029] In particular, the first adhesive plate 33 is bonded between the first end plate 31 and the cell assembly 20 to improve the fastening effect between the first end plate 31 and the cell assembly 20. Similarly, the second adhesive plate 34 is bonded between the second end plate 32 and the cell assembly 20 to improve the fastening effect between the second end plate 32 and the cell assembly 20. Furthermore, the first adhesive plate 33 and the second adhesive plate 34 are each attached to two opposite side walls of the insulating cover 23, thus restricting the movement of the insulating cover 23 and the connecting component 22 between the first adhesive plate 33 and the second adhesive plate 34. This improves the fastening effect of the assembly on the insulating cover 23 and the connecting component 22 and prevents vibration of the insulating cover 23 and the connecting component 22 under external force.In one example, the main material for both the first adhesive plate 33 and the second adhesive plate 34 is an epoxy plate.

[0030] In some embodiments, the connecting component 22 is provided on a side adjacent to the first end plate 31 with a first projecting tab 221; wherein a projection 311 is arranged on the first end plate 31, in which a through-hole 312 is provided, and the first projecting tab 221 is inserted into the through-hole 312. The battery pack further comprises a second fastening element 52, which is successively passed through the projection 311 and the first projecting tab 221 to fasten the first projecting tab 221 to the projection 311.

[0031] To prevent, in particular, the connecting component 22 or the insulating cover 23 from detaching from the cell group 21 under the influence of an external force, the first protruding tab 221 is arranged on the battery protection plate in this embodiment. This protruding tab is attached to the projection 311 of the first end plate 31 by the second fastening element 52. This prevents the connecting component 22 or the insulating cover 23 from detaching from the cell group 21 due to an external force. As shown in the Fig. 1 and Fig. As shown in Figure 3, the first end plate 31 is provided with several projections 311 which extend in a first direction (such as the X-direction in Fig. 1) are spaced apart from each other. The connecting component 22 also has several first projecting tabs 221, each of which corresponds to one of the respective projections 311. This increases the connection stability between the first end plate 31 and the connecting component 22. In one example, the second fastening element 52 is a bolt.

[0032] In some embodiments, the battery pack further comprises a mounting plate 60 and a third fastening element 53, wherein the third fastening element 53 extends through a first end of the mounting plate 60 and is connected to an inner wall surface of the housing 10, and a second end of the mounting plate 60 is attached to the first end plate 31.

[0033] In this embodiment, the mounting plate 60 and the third fastening element 53 serve to secure the first end plate 31 in the mounting space 101, thereby preventing the first end plate 31 from vibrating under the influence of an external force. The inner wall surface of the mounting space 101 is provided with a first connecting part 111, which serves to be connected to the first end of the mounting plate 60. As shown in Fig. As shown in Figure 1, in one example two mounting plates 60 are provided, wherein the second ends of the two mounting plates 60 are each attached to both sides of the first end plate 31 in the first direction, and the second ends of the two mounting plates 60 are each attached to the first connecting parts 111 on two opposite inner wall surfaces of the housing 10, thereby securing the first end plate 31 within the mounting space 101. In one example, the third fastening element 53 is a bolt.

[0034] Furthermore, as in Fig. As shown in Figure 1, a first connecting hole 313 is provided in the first end plate 31 in the vertical direction of the battery pack, and a second connecting hole 113 is provided in the base of the mounting space 101, which fits the first connecting hole 313. The battery pack further comprises a fourth fastening element 54, which is successively passed through the second end of the mounting plate 60, the first connecting hole 313 and the second connecting hole 113 in order to fasten the second end of the mounting plate 60 to the first end plate 31 and to fasten the first end plate 31 in the mounting space 101.

[0035] In particular, the second end of the mounting plate 60 rests against the first end plate 31, and then the fourth fastening element 54 is successively passed through the second end of the mounting plate 60, the first connecting hole 313, and the second connecting hole 113, thereby securing the mounting plate 60 to the floor of the mounting space 101 to prevent the mounting plate 60 from oscillating under the influence of an external force in the vertical direction of the battery pack. In one example, a first connecting hole 313 is arranged on each side of the first end plate 31 in the first direction, and two second connecting holes 113 are also arranged on the inner wall of the floor of the corresponding mounting space 101.The two fourth fastening elements 54 are each passed through the second ends of the two fastening plates 60 and through the two first connecting holes 313 and the two second connecting holes 113, thereby further improving the connection stability of the first end plate 31 in the mounting space 101.

[0036] In some embodiments, the second end plate 32 is provided with a second projecting tab 321, which projects in one direction away from the cell assembly 20. The battery pack further comprises a fifth fastening element 55, which is successively guided through the second projecting tab 321 and an inner wall surface of the housing 10 to secure the second end plate 32 in the mounting space 101.

[0037] In particular, the housing comprises 10 with reference to the Fig. 1 and Fig. 2 a main body 11 and a cover body 12. The main body 11 has an opening that communicates with the mounting space 101, while the cover body 12 is detachably connected to the main body 11 to cover the opening. A second connecting part 112 is arranged on the side wall of the opening of the main body 11, which fits the second projecting tab 321. The second projecting tab 321 of the second end plate 32 extends towards the second connecting part 112 and overlaps the second connecting part 112, whereupon the second projecting tab 321 is locked by the fifth fastening element 55 on the second connecting part 112. In some embodiments, the second end plate 32 is provided with several second projecting tabs 321, which are arranged successively at intervals in the first direction. Several second connecting parts 112 are also provided, which are arranged at intervals in the first direction.The multiple second projection tabs 321 are attached to the multiple second connecting parts 112 via multiple fifth fastening elements 55 in a one-to-one correspondence. In one example, the fifth fastening element 55 is a bolt.

[0038] Additionally, the cover body 12 is provided with several first mounting holes 121 spaced apart circumferentially, while the main body 11 is provided with several second mounting holes 114 spaced apart circumferentially. The battery pack further comprises several sixth fastening elements 56, each sixth fastening element 56 being successively passed through a corresponding first mounting hole 121 and a second mounting hole 114, thereby fastening the cover body 12 to the main body 11. In some embodiments, a sealing groove 115 is provided on the side of the cover body 12 adjacent to the main body 11 and / or on the side of the main body 11 adjacent to the cover body 12. A sealing element (not shown in the figures) is embedded in the sealing groove 115 to improve the sealing effect of the battery pack. In a specific embodiment, as shown in Fig. As shown in Figure 2, the sealing groove 115 is provided on the side of the main body 11 next to the cover body 12.

[0039] In some embodiments, the battery pack further comprises a second adhesive element 43, wherein the second adhesive element 43 is arranged between the underside of the cell assemblies 20 and the inner wall surface of the housing 10 to secure the cell assembly 20 in the mounting space 101.

[0040] In this embodiment, to ensure secure fastening of the cell assembly 20 within the mounting space 101, a connection is established between the cell assembly 20 and the housing 10 by means of the second adhesive 43. That is, the undersides of all cells 201 are each bonded to one side of the second adhesive 43, and the other side of the second adhesive 43 is bonded to the inner wall surface of the floor of the mounting space 101. This embodiment is characterized by a simple structure requiring only a few components, which increases the assembly efficiency of the battery pack to a certain extent and reduces the manufacturing costs of the battery pack to a certain extent.

[0041] Furthermore, the separating element 41 comprises a first epoxy plate, and optionally the second adhesive element 43 comprises a second epoxy plate.

[0042] In this embodiment, the separating element 41, the second adhesive 43, the first adhesive plate 33, and the second adhesive plate 34 are all made of epoxy sheets. The epoxy sheet in this embodiment is an FR4 epoxy sheet, i.e., a composite material made of high-molecular-weight organic compounds of epoxy resin and glass fiber. This epoxy sheet has good mechanical and dielectric properties, and due to its superior insulating and flame-retardant properties, it is widely used in the electronics and electrical industries. As an insulating component within the battery pack, it provides excellent insulation protection, effectively preventing current leakage and short circuits, and thus ensuring the normal operation of the battery device.

[0043] Optionally, the first adhesive element comprises 42 foams, which are characterized by excellent moisture resistance, thermal insulation, cushioning, and shock-absorbing properties. This enables effective cushioning and thermal insulation between the individual cells. Furthermore, the foam is easy to process and relatively inexpensive. Consequently, its use in the battery pack not only provides excellent protection but also reduces the manufacturing costs of the battery pack.

[0044] In some embodiments, the cell 201 is a square cell 201, and between two adjacent square cells 201 in a series of cell groups 21, the larger surfaces of the square cells are glued with foam, so that the larger surfaces of the two adjacent square cells 201 are connected to each other by the foam, while the smaller surfaces of the cells 201 in the cell group 21 are connected to each other by the first epoxy plate, so that smaller epoxy plates can be used, which reduces the manufacturing cost of the battery pack.

[0045] Furthermore, as in Fig. As shown in Figure 3, a boundary edge 223 is arranged on each of the two opposite side walls of the connecting component 22, and the two boundary edges 223 each support themselves against the two opposite sides of the cell group 21.

[0046] In particular, when the circuit protection board is assembled with the cell group 21 to prevent relative movement between the circuit protection board and the cell group 21 under the influence of an external force, in this embodiment a limiting edge 223 is provided on each of the two opposite side walls of the circuit protection board, which are perpendicular to the first direction, and the limiting edges 223 each bear against the cell group 21, so that the cell group 21 exerts a certain supporting force on the circuit protection board, and this prevents to a certain extent the circuit protection board from exhibiting movement with the cell group 21 under the influence of external forces. Furthermore, as shown in Fig.As shown in Figure 3, a first weld 211 is arranged on the cell group 21, and a second weld 224, which corresponds to the first weld 211, is also arranged on the connecting component 22. During assembly of the circuit protection board, the first weld 211 and the second weld 224 are first aligned, and then the circuit protection board is placed on the cell group 21, with the limiting edges 223 bearing against the side walls of the cell group 21, thus preventing the circuit protection board from moving under the influence of external forces. Therefore, it is easy to weld the first weld 211 and the second weld 224 together, thus securing the circuit protection board to the cell group 21.

[0047] In summary, the present application offers at least the following advantageous technical effects compared to related technology: In the battery pack of the present application, it is not necessary to arrange side plates on all four sides of the cell assembly 20, thereby reducing the manufacturing costs of the battery pack to a certain extent. On the other hand, the larger areas of two adjacent square cells 201 are connected by the foam, and the smaller areas of the cells 201 in the cell assembly 21 are connected to the first epoxy plate. This allows a smaller size of epoxy plate to be used for the first epoxy plate, which again reduces the manufacturing costs of the battery pack.Furthermore, a double fastening structure is used between the connecting component 22 and the insulating cover 23. This means that the insulating cover 23 and the connecting component 22 are not only fastened by the fit of the locking lug 222 and locking groove 231, but are additionally secured by the first fastening element 51. This improves the bond strength between the insulating cover 23 and the connecting component 22. Finally, both the first adhesive plate 33 and the second adhesive plate 34 bear against the two opposite side walls of the insulating cover 23, thereby reinforcing the fastening effect of the assembly on the insulating cover 23 and the connecting component 22 to prevent the insulating cover 23 and the connecting component 22 from vibrating under the influence of external forces.

[0048] To simplify the description, spatial relative terms such as "above...", "above...", "on the surface of...", "above", etc., can be used to describe the spatial positional relationship of a component or feature to other components or features as shown in the drawings. It is important to understand that spatial relative terms are intended to encompass orientations other than the one described in the drawings when the component is used or operated. For example, if the component is reversed in the drawings, the component described as "above other components or structures" or "on top of other components or structures" will then be positioned as "below other components or structures" or "under other components or structures". Therefore, the exemplary term "above..." can refer to both the orientation "above..."This includes both the orientation "below..." and the orientation "below...". The component can also be positioned in various other ways (rotated 90 degrees or in other orientations), and a corresponding interpretation of the spatial reference terms used here will be made.

[0049] Furthermore, it should be noted that the use of terms such as "first," "second," etc., to designate components serves solely to distinguish the respective components. Unless otherwise stated, the aforementioned terms have no special meaning and are therefore not to be understood as limiting the scope of protection of this application.

[0050] The foregoing statements merely represent preferred embodiments of the present application and are not intended to limit this application. Various amendments and variations of the present application are possible for those skilled in the art. All changes, equivalent replacements, improvements, etc., made in the sense and within the scope of the present application shall fall within the scope of protection of the present application.

Claims

[1] Battery pack, characterized by , that it includes: a housing (10) in which a mounting space (101) is arranged; a cell assembly (20) which is fixed in the assembly space (101), wherein the cell assembly (20) comprises several rows of cell groups (21), wherein adjacent two rows of cell groups (21) are separated from each other by a separating element (41), wherein the cell groups (21) each comprise several cells (201), and wherein adjacent two cells (201) are fixed by a first adhesive element (42); a fastening assembly attached to the mounting space (101), wherein the fastening assembly comprises a first end plate (31) and a second end plate (32), wherein the first end plate (31) and the second end plate (32) are each connected longitudinally at the two ends of the cell assembly (20), and wherein the first end plate (31) and the second end plate (32) serve to fasten at least several rows of the cell groups (21). [2] Battery pack according to claim 1, characterized by, that the cell assembly (20) further comprises a connecting component (22) and an insulating cover (23), wherein the connecting component (22) is connected to the top of the cell assembly (20), and the insulating cover (23) is attached to the top of the connecting component (22); wherein one of the connecting component (22) and the insulating cover (23) is provided with a locking groove (231), and the other of the two is provided with a locking lug (222) that fits the locking groove (231), wherein the locking lug (222) is engaged in the locking groove (231) to attach the insulating cover (23) to the connecting component (22). [3] Battery pack according to claim 2, characterized by , further comprising a first fastening element (51) wherein the first fastening element (51) is successively passed through the insulating cover (23) and the connecting component (22) to fasten the insulating cover (23) to the connecting component (22). [4] Battery pack according to claim 2 or 3, characterized by , that the fastening assembly further comprises a first adhesive plate (33) and a second adhesive plate (34); wherein the first adhesive plate (33) is bonded between the first end plate (31) and the cell assembly (20) and the second adhesive plate (34) is bonded between the second end plate (32) and the cell assembly (20), and / or wherein the first adhesive plate (33) and the second adhesive plate (34) each extend in the vertical direction of the battery pack and are each attached to two opposite side walls of the insulating cover (23). [5] Battery pack according to any one of claims 2 to 4, characterized by , that the connecting component (22) is provided with a first projecting tab (221) on a side that is close to the first end plate (31); wherein a projection (311) is arranged on the first end plate (31) in which a through hole (312) is provided, and the first projection tab (221) is inserted into the through hole (312); wherein the battery pack further comprises a second fastening element (52) which is successively passed through the projection (311) and the first projection tab (221) to fasten the first projection tab (221) to the projection (311). [6] Battery pack according to any one of claims 1 to 5, characterized by , that it further comprises a mounting plate (60) and a third mounting element (53), wherein the third mounting element (53) passes through a first end of the mounting plate (60) and is connected to an inner wall surface of the housing (10), and a second end of the mounting plate (60) is attached to the first end plate (31). [7] Battery pack according to claim 6, characterized by, that a first connecting hole (313) is provided in the first end plate (31) in the vertical direction of the battery pack, and a second connecting hole (113) is provided in a base of the mounting space (101) which fits the first connecting hole (313); that the battery pack further comprises a fourth fastening element (54) which is successively passed through the second end of the mounting plate (60), the first connecting hole (313) and the second connecting hole (113) in order to fasten the second end of the mounting plate (60) to the first end plate (31) and to fasten the first end plate (31) in the mounting space (101). [8] Battery pack according to any one of claims 1 to 7, characterized by, that the second end plate (32) is provided with a second projecting tab (321) which projects in a direction away from the cell assembly (20); that the battery pack further comprises a fifth fastening element (55) which is successively passed through the second projecting tab (321) and an inner wall surface of the housing (10) to secure the second end plate (32) in the mounting space (101). [9] Battery pack according to any one of claims 1 to 8, characterized by , furthermore comprising a second adhesive element (43) arranged between the underside of the cell assembly (20) and an inner wall surface of the housing (10) to secure the cell assembly (20) in the assembly space (101). [10] Battery pack according to claim 9, characterized by , that the separating element (41) comprises a first epoxy plate; and / or that the first adhesive element (42) comprises foam; and / or that the second adhesive element (43) comprises a second epoxy plate.

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