Battery pack

Abstract

The utility model discloses a battery pack. The battery pack comprises a shell, a battery module and a supporting assembly, wherein the shell is provided with a mounting cavity; the battery module is fixedly mounted in the mounting cavity; the battery module comprises a battery cell group and end plate components arranged at the two ends of the battery cell group; the supporting assembly is fixed in the mounting cavity, the supporting assembly comprises a first supporting part and a second supporting part, the first supporting part is fixedly connected with the end plate component at one end of the battery module, and the second supporting part is fixedly connected with the end plate component at the other opposite end of the battery module. According to the battery pack, the problem that the height of the battery pack is increased after a supporting structure for mounting the battery pack is arranged in the prior art can be solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery technology field, specifically, relate to a battery pack. BACKGROUND

[0002] At present, the battery pack of sheet metal class etc. mainly installs the battery module through setting a support structure in the bottom of the battery pack box, in order to bear the battery module and enhance the structural strength of the battery pack. But setting the support structure for supporting the battery module in the bottom of the battery pack box, under the condition that the size of the battery module is fixed, will cause the height of the battery pack to increase. SUMMARY

[0003] The main purpose of the utility model is to provide a kind of battery pack, to at least solve the problem of height increase of battery pack after setting support structure for installing battery pack.

[0004] According to one aspect of the utility model, a kind of battery pack is provided, comprising:

[0005] Shell, the shell is provided with installation cavity;

[0006] Battery module, the battery module is fixedly installed in the installation cavity, and the battery module includes electric core group and end plate component arranged at the both ends of the electric core group;

[0007] Support assembly, the support assembly is fixed in the installation cavity, and the support assembly includes first support part and second support part, the first support part is fixedly connected with the end plate component of one end of the battery module, and the second support part is fixedly connected with the end plate component of the other end opposite to the battery module.

[0008] Further, the end of the support assembly close to the bottom of the installation cavity has first flanging extending towards the direction close to the battery module, and the support assembly is fixedly connected with the bottom of the installation cavity by the first flanging.

[0009] Further, the side of the end plate component close to the bottom of the installation cavity is provided with first bending section extending towards the direction close to the support assembly, and the end plate component is fixedly connected with the first flanging of the support assembly by the first bending section.

[0010] Further, the end of the support assembly close to the top of the installation cavity is provided with second flanging extending towards the direction away from the battery module, and the support assembly is connected with the end plate component by the second flanging.

[0011] Further, the battery pack further includes pressing plate, and the pressing plate is fixedly connected with the second flanging and is pressed to the top of the end plate component.

[0012] Further, the pressing plate comprises a first flat section, a connecting section and a second flat section, the first flat section is connected with the second flat section through the connecting section, the first flat section is fixedly connected with the support assembly, and the second flat section is press-connected to the top of the end plate component.

[0013] Further, the first flange of the support assembly is fixedly connected with the bottom of the mounting cavity through welding or clamping; and / or,

[0014] the second flange of the support assembly is fixedly connected with the side wall of the mounting cavity through welding or clamping; and / or,

[0015] the support assembly and the battery module are connected through a connecting assembly, and the connecting assembly comprises a stud, a bolt or a screw.

[0016] Further, the support assembly and the inner wall of the mounting cavity have a first buffer space, and the support assembly and the battery module have a second buffer space.

[0017] Further, the end plate component comprises a sheet metal part, the sheet metal part is provided with a protruding part protruding away from the direction of the battery cell group, and the protruding part comprises a convex and / or a convex rib.

[0018] Further, the top end and the bottom end of the sheet metal part are respectively provided with the first bending section and the second bending section, the second bending section and the first bending section are integrally formed with the sheet metal part or are separately arranged and then assembled into an integral whole, and the second flat section is press-connected to the second bending section.

[0019] In the utility model, the first support part and the second support part of the support assembly are arranged at the two ends of the battery module and are fixedly connected with the end plate components at the two ends of the battery module, so that the problem that the support assembly arranged at the bottom of the battery module affects the overall height of the battery pack is avoided, the overall height of the battery pack is reduced, the battery pack is more easily connected with the predetermined equipment, the support assembly arranged at the two ends of the battery module is used for supporting the battery module, and the structural stability of the battery pack is remarkably improved. BRIEF DESCRIPTION OF DRAWINGS

[0020] The drawings described herein are used to provide further understanding of the utility model and constitute a part of the utility model, and the illustrative embodiments of the utility model and the description thereof are used to explain the utility model and do not constitute improper limitation on the utility model. In the drawings:

[0021] Figure 1 A perspective structural view of the battery pack disclosed in the embodiments of the utility model is shown in the drawings.

[0022] Figure 2A perspective view of the battery pack without the battery module installed is disclosed for the embodiments of the utility model.

[0023] Figure 3 A sectional view of the battery pack after the battery module is installed is disclosed for the embodiments of the utility model.

[0024] Figure 4 A structure schematic view of the battery pack after the battery module is installed is disclosed for the embodiments of the utility model.

[0025] Figure 5 A partial structure schematic view of the battery pack after the battery module is installed is disclosed for the embodiments of the utility model.

[0026] Figure 6 A structure schematic view of the pressing plate is disclosed for the embodiments of the utility model.

[0027] Among them, the above-mentioned drawing includes the following figure marks:

[0028] 10, shell; 101, first buffer space; 102, second buffer space; 11, installation cavity; 20, battery module; 21, battery cell group; 22, end plate component; 221, first bending section; 222, protruding part; 223, second bending section; 30, support assembly; 301, first flange; 302, second flange; 31, first support part; 32, second support part; 40, pressing plate; 41, first straight section; 42, connecting section; 43, second straight section; 50, connecting assembly. DETAILED DESCRIPTION

[0029] It should be noted that the embodiments and features in the embodiments in the utility model can be combined with each other without conflict. The utility model will be described in detail below with reference to the drawings and in combination with the embodiments.

[0030] It should be noted that the terms used herein are only for describing specific embodiments, and are not intended to limit the exemplary embodiments according to the utility model. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form, and in addition, it should be understood that when the terms "comprise" and / or "include" are used in the specification, it means that the features, steps, operations, devices, components and / or their combinations exist.

[0031] The relative arrangement of parts and steps, numerical expressions, and values set forth in the examples are not intended to limit the scope of the present application unless otherwise specifically stated. Also, it is to be understood that the dimensions of the various parts shown in the drawings are not necessarily to scale. Techniques, methods, and apparatus known to those of ordinary skill are not discussed in detail but can be employed to form and use the claimed application. In all examples shown and discussed herein, any specific values should be interpreted as merely illustrative and not limiting. Other examples of the exemplary embodiments can have different values. It is noted that like numbers and letters refer to like elements throughout the several views of the drawings and, as such, no further discussion will be provided.

[0032] Referring to Figures 1 to 6 As shown, according to the embodiments of the present application, a battery pack is provided, comprising a shell 10, a battery module 20 and a support assembly 30. Wherein, the shell 10 is provided with a mounting cavity 11; the battery module 20 is fixedly installed in the mounting cavity 11, the battery module 20 comprises a battery cell group 21 and end plate components 22 arranged at both ends of the battery cell group 21; the support assembly 30 is fixed in the mounting cavity 11, the support assembly 30 comprises a first support part 31 and a second support part 32, the first support part 31 is fixedly connected with the end plate component 22 at one end of the battery module 20, and the second support part 32 is fixedly connected with the end plate component 22 at the other end of the battery module 20 opposite to the one end.

[0033] In the present embodiment, by arranging the first support part 31 and the second support part 32 of the support assembly 30 at both ends of the battery module 20 and fixedly connecting them with the end plate components 22 at both ends of the battery module 20, the support assembly 30 no longer occupies the bottom space of the battery module 20, which can reduce the overall height of the battery pack and make it more convenient to assemble the battery pack with the predetermined equipment. In the case of fixed height of the battery pack, the saved bottom space of the battery module 20 can be used to increase the volume of the battery module 20 and improve the capacity of the battery module 20, so as to further improve the endurance of the battery pack. The support assembly 30 supports the battery module 20 from both ends, which can also make the position of the battery module 20 in the mounting cavity 11 more stable, reduce the potential damage risk caused by vibration or impact, and improve the safety and reliability of the battery pack.

[0034] Further, the support assembly 30 has a first flange 301 extending towards the battery module 20 near one end of the bottom of the mounting cavity 11, and the support assembly 30 is fixedly connected to the bottom of the mounting cavity 11 through the first flange 301. It can be understood that the first support part 31 and the second support part 32 each have a first flange 301 extending towards the battery module 20 near one end of the bottom of the mounting cavity 11, and the contact area between the support assembly 30 and the bottom of the mounting cavity 11 is larger when the support assembly 30 is fixedly connected to the bottom of the mounting cavity 11 through the first flange 301, and the connection is more reliable, thereby ensuring that the battery pack can remain stable when subjected to external impact or vibration.

[0035] Further, the end plate component 22 has a first bending section 221 extending towards the support assembly 30 near one side of the bottom of the mounting cavity 11, and the end plate component 22 is fixedly connected to the first flange 301 of the support assembly 30 through the first bending section 221. The design of the first bending section 221 makes the connection between the end plate component 22 and the support assembly 30 more secure. Through the extension and fixed connection of the first bending section 221, a larger contact area between the first flange 301 of the support assembly 30 and the end plate component 22 can be provided, thereby enhancing the stability and reliability of the connection. The presence of the first bending section 221 can also disperse stress at the connection site and reduce stress concentration.

[0036] Further, the support assembly 30 has a second flange 302 extending away from the battery module 20 near one end of the top of the mounting cavity 11, and the support assembly 30 is connected to the end plate component 22 through the second flange 302. It can be understood that the second flange 302 and the first flange 301 of the support assembly 30 extend in opposite directions, i.e., the support assembly 30 has a "Z" shape structure, which can form a more stable support structure inside the battery pack, not only enhancing the strength of the support assembly 30 itself, but also fixedly connecting the first flange 301 of the support assembly 30 to the bottom of the mounting cavity 11 and the first bending section 221 of the end plate component 22, and connecting the second flange 302 to the end plate component 22, so that the stress generated during the operation of the battery pack can be more effectively dispersed to the entire support assembly 30, thereby helping to reduce stress concentration and the risk of damage to the connection site and structure. Further, the battery pack also includes a pressing plate 40 fixedly connected to the second flange 302 and pressed to the top of the end plate component 22. The pressing plate 40 includes a first flat section 41, a connecting section 42, and a second flat section 43, the first flat section 41 and the second flat section 43 are connected through the connecting section 42, the first flat section 41 is fixedly connected to the support assembly 30, and the second flat section 43 is pressed to the top of the end plate component 22.

[0037] The end plate is provided with a structure of the first flat section 41, the connecting section 42 and the third flat section, which can improve the toughness of the pressing plate 40, enhance the structural strength of the pressing plate 40, and thus improve the overall structural strength of the battery pack. The second flat section 43 of the pressing plate 40 is directly crimped on the top of the end plate component 22, and cooperates with the second buffer space 102, so that when the battery module 20 is internally expanded or subjected to external force, the battery module 20 can have a certain deformation ability towards the first buffer space 101, which helps to prolong the service life of the battery module 20 and improve the reliability and durability of the entire battery pack.

[0038] Optionally, the first flange 301 of the support assembly 30 is fixedly connected with the bottom of the mounting cavity 11 by welding or clamping; and / or, the second flange 302 of the support assembly 30 is fixedly connected with the sidewall of the mounting cavity 11 by welding or clamping. By the connection mode of welding or clamping, sufficient connection strength can be provided to ensure the stability of the support assembly 30 in the mounting cavity 11.

[0039] The support assembly 30 and the battery module 20 are connected through the connecting assembly 50. In actual implementation, the specific structure of the connecting assembly 50 can be flexibly selected according to actual conditions, such as a stud, a bolt or a screw, etc. That is, the first flange 301 of the support assembly 30 is connected with the first bending section 221 of the end plate component 22 of the battery module 20 through a stud, a bolt or a screw, and the second flange 302 of the support assembly 30 is connected with the first flat section 41 of the pressing plate 40 through a stud, a bolt or a screw. Preferably, in order to ensure the stability of the support assembly 30 and the connection between the bottom of the mounting cavity 11 and the bottom of the end plate component 22, the first connecting member is a stud. The second connecting member is a stud or a bolt.

[0040] Further, the support assembly 30 and the inner wall of the mounting cavity 11 have the first buffer space 101, and the support assembly 30 and the battery module 20 have the second buffer space 102. Specifically, the first buffer space 101 and the second buffer space 102 are located on both sides of the support assembly 30. During the use of the battery pack, the cell group 21 may be expanded due to aging or external factors. Therefore, through the first buffer space 101 and the second buffer space 102, the expansion of the cell group 21 can be prevented from directly pressing the support assembly 30 or the shell 10 of the battery pack, and the overall structural stability of the battery pack can be enhanced. When receiving external impact or vibration, the buffer space can reduce the impact force, and reduce the damage to the battery module 20 and the support assembly 30.

[0041] Further, the end plate component 22 of the embodiment includes a sheet metal part, and the sheet metal part is provided with a protruding part 222 protruding away from the direction of the battery cell group 21, the protruding part 222 including a convex and / or a convex rib, that is, the sheet metal part has at least one of the convex and the convex rib protruding towards the first buffer space 101, and by providing the convex and / or the convex rib, the structural strength of the sheet metal part can be enhanced, external applied forces can be dispersed and resisted, stress concentration can be reduced, and local strength deficiency can be avoided to cause rupture or deformation, and the overall rigidity and deformation resistance of the battery pack are improved.

[0042] Further, the top end and the bottom end of the sheet metal part are respectively provided with a first bending section 221 and a second bending section 223, the second bending section 223 and the first bending section 221 are integrally formed with the sheet metal part and assembled into one body, or can be separately provided and assembled into one body, and the second straight section 43 is crimped to the second bending section 223. The first bending section 221 and the second bending section 223 both extend towards the first buffer space 101, the first bending section 221 is fixedly connected with the first flange 301 of the support assembly 30 through extension, and the second bending section 223 is connected with the second flange 302 of the support assembly 30 through the pressing plate 40, and the stability and the connection strength of the structure are enhanced.

[0043] For the convenience of description, spatial relative terms such as "above", "upper", "top surface", "upper" and the like can be used herein to describe the spatial positional relationship of one device or feature with other devices or features as shown in the drawings. It should be understood that the spatial relative terms are intended to include different orientations in use or operation in addition to the orientation of the device described in the drawings. For example, if the device in the drawing is inverted, the device described as "above" or "above" other devices or structures will be positioned "below" or "below" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative description used herein is interpreted accordingly.

[0044] In addition, it should be noted that the use of the terms "first", "second" and the like to define parts is only for the convenience of distinguishing the corresponding parts, and the above terms have no special meaning unless otherwise stated, and therefore cannot be understood as limiting the protective scope of the utility model.

[0045] The above are only preferred embodiments of the present application, and are not used to limit the present application, and for those skilled in the art, the present application can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A battery pack, characterized by, The battery pack comprises: a shell (10) provided with a mounting cavity (11); a battery module (20) fixedly installed in the mounting cavity (11), the battery module (20) comprising a cell group (21) and end plate components (22) arranged at both ends of the cell group (21); a support assembly (30) fixed in the mounting cavity (11), the support assembly (30) comprising a first support part (31) and a second support part (32), the first support part (31) being fixedly connected with the end plate component (22) at one end of the battery module (20), and the second support part (32) being fixedly connected with the end plate component (22) at the other end of the battery module (20) opposite to the one end.

2. The battery pack of claim 1, wherein, The support assembly (30) has a first flange (301) extending towards the battery module (20) at one end close to the bottom of the mounting cavity (11), and the support assembly (30) is fixedly connected with the bottom of the mounting cavity (11) through the first flange (301).

3. The battery pack of claim 2, wherein, The end plate component (22) has a first bending section (221) extending towards the support assembly (30) at one side close to the bottom of the mounting cavity (11), and the end plate component (22) is fixedly connected with the first flange (301) of the support assembly (30) through the first bending section (221).

4. The battery pack of claim 3, wherein, The support assembly (30) has a second flange (302) extending away from the battery module (20) at one end close to the top of the mounting cavity (11), and the support assembly (30) is connected with the end plate component (22) through the second flange (302).

5. The battery pack of claim 4, wherein, The battery pack further comprises a pressing plate (40) fixedly connected with the second flange (302) and pressed against the top of the end plate component (22).

6. The battery pack of claim 5, wherein, The pressing plate (40) comprises a first flat section (41), a connecting section (42) and a second flat section (43), the first flat section (41) and the second flat section (43) being connected through the connecting section (42), the first flat section (41) being fixedly connected with the support assembly (30), and the second flat section (43) being pressed against the top of the end plate component (22).

7. The battery pack of claim 4, wherein, The first flange (301) of the support assembly (30) and the bottom of the mounting cavity (11) are fixedly connected through welding or clamping; and / or, The second flange (302) of the support assembly (30) and the side wall of the mounting cavity (11) are fixedly connected through welding or clamping; and / or, The support assembly (30) and the battery module (20) are connected through a connecting assembly (50) comprising a stud, a bolt or a screw.

8. The battery pack of claim 1, wherein, The support assembly (30) and the inner wall of the mounting cavity (11) have a first buffer space (101), and the support assembly (30) and the battery module (20) have a second buffer space (102).

9. The battery pack of claim 6, wherein, The end plate component (22) comprises a sheet metal part provided with a protruding part (222) protruding away from the direction of the battery cell group (21), the protruding part (222) comprising a convex and / or a convex rib.

10. The battery pack of claim 9, wherein, The top end and the bottom end of the sheet metal part are respectively provided with the first bending section (221) and the second bending section (223), the second bending section (223) and the first bending section (221) being integrally formed with the sheet metal part and / or being separately provided and assembled into an integral body, and the second flat section (43) being crimped to the second bending section (223).

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