Battery pack

Abstract

The utility model discloses a battery pack. The battery pack comprises a main shell, two end shells and a battery module, the main shell is provided with two main plates and two side plates. A cavity and two openings communicated with the cavity are defined by the main plate and the side plates, a plurality of protruding strips are arranged on the outer surface of the main shell and / or the outer surface of the end shell, and a groove is formed between every two adjacent protruding strips. The two end shell parts are arranged at the two ends of the main shell respectively, and the two end shells cover the corresponding openings respectively. The battery module is arranged in the cavity. Wherein the main plate and the side plates are respectively made of integrally formed aluminum extruded profiles. According to the raised lines of the battery pack, the structural strength is improved, and meanwhile, the contact area with external air is increased, so that the heat dissipation performance of the battery pack is better. In addition, the aluminum extrusion profile is simple in production process and replaces a complex process procedure of a traditional metal plate material, the aluminum material also has extremely high corrosion resistance, secondary processing such as spraying of an anti-corrosion layer is not needed, and the production cost is greatly reduced. And the aluminum material also has a relatively strong heat conduction effect, so that natural cooling of the battery pack is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, and in particular to a battery pack. Background Art

[0002] In the prior art, the main shell of the battery pack is usually made of sheet metal. The structural strength of sheet metal is not high. When processing the structural parts of the main shell, the sheet metal material needs to go through a series of processes such as bending, welding, powder spraying or painting. The manufacturing cycle is long and the labor cost is high. The processing also requires pre-embedded nuts. The process of pre-embedded nuts is complicated and the cost is high. In addition, during the use of the sheet metal shell, the humid environment will corrode the shell, making the shell easy to rust and causing structural failure of the battery pack. The heat dissipation performance of the sheet metal material is also poor, which is not conducive to the natural cooling of the battery pack. The heat dissipation effect is poor, which can easily cause problems such as high temperature and large temperature difference in the battery system. Utility Model Content

[0003] In order to solve one of the above technical problems, the present application provides a battery pack.

[0004] The utility model adopts the following technical solutions:

[0005] A battery pack, comprising:

[0006] A main shell having two main plates and two side plates, wherein the area of ​​the main plates is larger than that of the side plates, the two main plates are spaced apart and arranged in parallel, the two side plates are respectively located on either side of the main plates, and the side plates are respectively connected to the two main plates, the main plates and the side plates enclose a cavity and two openings communicating with the cavity, and a plurality of ridges are provided on the outer surface of the main shell and / or the end shell, with grooves formed between adjacent ridges;

[0007] Two end shells, the two end shells are respectively arranged at two ends of the main shell, and the two end shells respectively cover corresponding openings;

[0008] a battery module, the battery module being disposed in the cavity;

[0009] Wherein, the main board and side panels are respectively integrally formed aluminum extruded profiles.

[0010] Optionally, the side panel includes a side panel body and bent panels located on both sides of the side panel body along the width direction, and the side panel body and the bent panels are integrally formed;

[0011] The main board and the corresponding bending plate are located in the same plane, and the two main boards are respectively connected to the corresponding bending plates;

[0012] A plurality of convex strips are provided on the side plate body.

[0013] Optionally, the main board and the bent plate are detachably connected, the thickness end surfaces of the main board and the bent plate are abutted against each other, and the outer surfaces of the main board and the bent plate are smoothly transitioned.

[0014] Optionally, the main board includes a base plate and sunken steps provided on both sides of the base plate along a width direction, and a step groove is formed between the sunken steps and the base plate;

[0015] The bent plate of the side plate is embedded in the step groove and supported on the sunken step.

[0016] Optionally, a chute is provided on the sunken step;

[0017] A slide bar is provided on the inner side of the bending plate, and the slide bar is slidably connected to the slide groove.

[0018] Optionally, the battery pack includes two battery modules, both of which are disposed in the cavity, a first air duct is formed between the two battery modules, and a second air duct is formed between the battery module and the side plate;

[0019] A ventilation portion connected to the second air duct is provided on one of the end shells, and a fan is provided on the other end shell, and the fan is located at one end of the first air duct;

[0020] The battery module has a ventilation channel communicating with the first air duct and the second air duct.

[0021] Optionally, a tab is provided on the side of the battery module facing the second air duct.

[0022] Optionally, the battery pack includes a plurality of aluminum bars, each of which is located in the second air duct, and each of the aluminum bars is connected to a corresponding tab, and each aluminum bar connects each cell of the battery module;

[0023] Wherein, the ventilation channel is provided between adjacent battery cells in the battery module.

[0024] Optionally, the battery pack includes an insulating baffle, which is located in the second air duct and between each aluminum bar and the side panel body.

[0025] Optionally, the insulating baffle includes a main baffle and side baffles arranged on both sides of the main baffle;

[0026] The main baffle is located in the second air duct and between the aluminum bar and the side panel body;

[0027] The two side baffles are respectively connected to two sides of the battery module along a direction perpendicular to the main board.

[0028] By adopting the above technical solution, this application has the following beneficial effects:

[0029] The ridges of the battery pack in this application increase structural strength and the contact area with the outside air, improving the heat dissipation performance of the battery pack. Furthermore, the aluminum extrusion profile has a simple production process, replacing the complex process steps of traditional sheet metal materials. Aluminum also has extremely high corrosion resistance and does not require secondary processing such as spraying an anti-corrosion coating, greatly reducing production costs. Aluminum also has strong thermal conductivity, which facilitates the natural cooling of the battery pack.

[0030] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The accompanying drawings are part of this application and are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention but do not constitute an undue limitation of the present invention. Obviously, the drawings described below are only some embodiments. For those skilled in the art, other drawings can be obtained based on these drawings without inventive work. In the drawings:

[0032] Figure 1 A schematic diagram of the three-dimensional structure of a battery pack provided in an embodiment of the present application;

[0033] Figure 2 An exploded view of the main housing and end housing of the battery pack provided in an embodiment of the present application;

[0034] Figure 3 A schematic diagram of the internal structure of a battery pack provided in an embodiment of the present application;

[0035] Figure 4 A schematic structural diagram of the mainboard of the battery pack provided in an embodiment of the present application;

[0036] Figure 5 A schematic structural diagram of a side panel of a battery pack provided in an embodiment of the present application;

[0037] Figure 6 A schematic structural diagram of a battery module of a battery pack provided in an embodiment of the present application;

[0038] Figure 7 A schematic structural diagram of the air duct plate of the battery pack provided in an embodiment of the present application;

[0039] Figure 8 A cross-sectional view of a battery pack provided in an embodiment of the present application.

[0040] In the figure: main shell 1, main board 11, base plate 111, sunken step 112, slide groove 1121, side panel 12, side panel body 121, bending plate 122, slide bar 1221, end shell 2, ventilation part 21, convex strip a, battery module 3, air duct plate 31, ventilation channel 311, fan 4, aluminum bar 5, insulating baffle 6, main baffle 61, side baffle 62, first air duct 7, second air duct 8.

[0041] It should be noted that these drawings and textual descriptions are not intended to limit the conceptual scope of the present invention in any way, but rather to illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0042] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention but are not used to limit the scope of the present invention.

[0043] In the description of the present invention, it should be noted that the terms "upper", "lower", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0044] In the description of this utility model, it should be noted that, unless otherwise specified or limited, the terms "mounted" and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; and direct connections or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of these terms in this utility model based on the specific circumstances.

[0045] See also Figures 1 to 8As shown, the battery pack provided by the embodiment of the application comprises a main shell 1, two end shells 2 and a battery module 3. The main shell 1 has two main plates 11 and two side plates 12, the area of the main plate 11 is larger than that of the side plate 12, the two main plates 11 are arranged in parallel and spaced apart, the two side plates 12 are respectively located on the two sides of the main plate 11, and the side plate 12 is connected to the two main plates 11 respectively, the main plate 11 and the side plate 12 enclose a cavity and two openings communicating with the cavity, and a plurality of convex strips a are arranged on the outer surface of the main shell 1 and / or the end shell 2, and a groove is formed between adjacent convex strips a. The two end shells 2 are respectively arranged at the two ends of the main shell 1, and the two end shells 2 respectively cover the corresponding openings. The battery module 3 is arranged in the cavity. Wherein, the main plate 11 and the side plate 12 are respectively an aluminum extruded profile formed integrally. The convex strips a of the battery pack of the application increase the structural strength, increase the contact area with the external air, and make the heat dissipation performance of the battery pack better. The aluminum extruded profile has a simple production process and can form a complex shape. Only the profile mold is needed for direct extrusion forming, which replaces the complex process procedure of the traditional sheet metal material, and the aluminum material has high corrosion resistance and does not need secondary processing such as spraying of a corrosion-resistant layer, thereby greatly reducing the production cost. The aluminum material also has strong heat conduction effect, which is conducive to the natural cooling of the battery pack.

[0046] As shown in Figure 2 and Figure 5 , the side plate 12 comprises a side plate body 121 and a bending plate 122 located on both sides of the side plate body 121 in the width direction, and the side plate body 121 and the bending plate 122 are integrally formed. The integrally formed structure has high strength and is not easy to deform. The main plate 11 and the corresponding bending plate 122 are located in the same plane, and the two main plates 11 are connected to the corresponding bending plates 122 respectively. A plurality of convex strips a are arranged on the side plate body 121. The side plate 12 is easy to deform under stress, and the convex strips a increase the structural strength of the side plate 12, so that the stability of the battery pack is good and the battery pack is not easy to deform.

[0047] The main plate 11 and the bending plate 122 are detachably connected, the thickness end faces of the main plate 11 and the bending plate 122 abut, and the outer surfaces of the main plate 11 and the bending plate 122 are smoothly transitioned without protruding structures, which will not collide with external structures, so that the appearance structure of the battery pack of the application is beautiful, and the detachable structure is convenient for disassembly and assembly and has high assembly efficiency.

[0048] In a possible implementation, as shown in Figure 1 and Figure 4As shown, the mainboard 11 includes a base plate 111 and sunken steps 112 disposed on either side of the base plate 111 along its width. A step groove is formed between the sunken steps 112 and the base plate 111. The bent plates 122 of the side panels 12 fit within the step groove and are supported by the sunken steps 112. This ensures that the mainboard 11 and the corresponding bent plates 122 are coplanar, eliminating protruding structures and enhancing the battery pack's aesthetic appearance.

[0049] like Figure 4 and Figure 5 As shown, a slide groove 1121 is provided on the sunken step 112. A slide bar 1221 is provided on the inner side of the bent plate 122, and the slide bar 1221 is slidably connected to the slide groove 1121. The main plate 11 and the side plate 12 are slidably engaged through the slide groove 1121 and the slide bar 1221, so that the two can be pulled together or separated, making assembly and disassembly convenient.

[0050] In one possible embodiment, Figure 8 As shown, the battery pack includes two battery modules 3, both of which are disposed within the cavity. A first air duct 7 is formed between the two battery modules 3, and a second air duct 8 is formed between the battery module 3 and the side panel 12. A ventilation portion 21 is provided on one end housing 2, connecting to the second air duct 8. A fan 4 is provided on the other end housing 2, located at one end of the first air duct 7. The battery module 3 has a ventilation channel 311 connecting the first air duct 7 and the second air duct 8. The fan 4 creates an air flow path from the ventilation portion 21 to the second air duct 8, then from the second air duct 8 to each ventilation channel 311, and finally to the first air duct 7. Finally, the hot air is discharged from the fan 4 to the outside of the battery pack, thereby cooling the battery modules 3 and achieving effective cooling. An air duct plate 31 is provided between adjacent cells in the battery module 3, and the air duct plate 31 has the ventilation channel 311.

[0051] The battery module 3 is provided with a tab on the side facing the second air duct 8. Under the action of the fan 4, an air flow path is formed from the ventilation portion 21 to the second air duct 8, and then from the second air duct 8 to each ventilation channel 311. The tab is located on the air flow path, which is conducive to heat dissipation from the tab and has high heat dissipation efficiency.

[0052] In one possible embodiment, Figure 6 and Figure 8As shown, the battery pack includes multiple aluminum bars 5, each of which is located in the second air duct 8. Each aluminum bar 5 is connected to a corresponding tab, and each aluminum bar 5 connects the cells of the battery module 3. The ventilation channel 311 is located between adjacent cells in the battery module 3. The aluminum bars 5 are perpendicular to the air duct plate 31 along their length, and a gap is defined between the aluminum bars 5 and the air duct plate 31. Under the action of the fan 4, cold air flows from the ventilation portion 21 to the second air duct 8, then through the aluminum bars 5 and the tabs, to the gap, and then through the ventilation channel 311 of the air duct plate 31, and finally flows into the first air duct. The gap prevents heat from accumulating on the aluminum bars, improving the cooling effect.

[0053] In one possible embodiment, Figure 3 As shown, the battery pack includes an insulating baffle 6, which is located in the second air duct 8 and between each aluminum bar 5 and the side plate body 121. The insulating baffle 6 blocks one side of the tab to prevent the tab from contacting the inner wall of the shell and causing leakage accidents.

[0054] like Figure 3 As shown, the insulating baffle 6 includes a main baffle 61 and side baffles 62 disposed on either side of the main baffle 61. The main baffle 61 is located within the second air duct 8, between the aluminum bar 5 and the side panel body 121. The two side baffles 62 are respectively connected to the battery module 3 on either side in a direction perpendicular to the main board 11. The two side baffles 62 are respectively attached to the thickness end surfaces of the battery module 3 on both sides along the width direction. The main baffle 61 can have through holes to facilitate air flow. A large gap can be left between the main baffle 61 and the battery cell tabs and the aluminum bar 5 to ensure heat dissipation.

[0055] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment, it is not intended to limit the present invention. Any technician familiar with this patent can make some changes or modifications to equivalent embodiments using the above-mentioned technical content without departing from the scope of the technical solution of the present invention. However, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the solution of the present invention.

Claims

1. A battery pack, characterized in that: include: A main shell having two main plates and two side plates, wherein the area of ​​the main plates is larger than that of the side plates, the two main plates are spaced apart and arranged in parallel, the two side plates are respectively located on either side of the main plates, and the side plates are respectively connected to the two main plates, the main plates and the side plates enclose a cavity and two openings communicating with the cavity, and a plurality of ridges are provided on the outer surface of the main shell and / or the end shell, with grooves formed between adjacent ridges; Two end shells, the two end shells are respectively arranged at two ends of the main shell, and the two end shells respectively cover corresponding openings; a battery module, the battery module being disposed in the cavity; Wherein, the main board and side panels are respectively integrally formed aluminum extruded profiles.

2. The battery pack according to claim 1, wherein: The side panel comprises a side panel body and bent panels located on both sides of the side panel body in the width direction, wherein the side panel body and the bent panels are integrally formed; The main board and the corresponding bending plate are located in the same plane, and the two main boards are respectively connected to the corresponding bending plates; A plurality of convex strips are provided on the side plate body.

3. The battery pack according to claim 2, wherein: The main board and the bent plate are detachably connected, the thickness end surfaces of the main board and the bent plate are abutted against each other, and the outer surfaces of the main board and the bent plate are smoothly transitioned.

4. The battery pack according to claim 3, wherein: The main board includes a base plate and sunken steps arranged on both sides of the base plate along the width direction, and a step groove is formed between the sunken steps and the base plate; The bent plate of the side plate is embedded in the step groove and supported on the sunken step.

5. The battery pack according to claim 4, characterized in that: A chute is provided on the sunken step; A slide bar is provided on the inner side of the bending plate, and the slide bar is slidably connected to the slide groove.

6. The battery pack according to claim 2, characterized in that: The invention comprises two battery modules, both of which are arranged in the cavity, a first air duct is formed between the two battery modules, and a second air duct is formed between the battery module and the side plate; A ventilation portion connected to the second air duct is provided on one of the end shells, and a fan is provided on the other end shell, and the fan is located at one end of the first air duct; The battery module has a ventilation channel communicating with the first air duct and the second air duct.

7. The battery pack according to claim 6, characterized in that: A tab is provided on a side of the battery module facing the second air duct.

8. The battery pack according to claim 7, characterized in that: It includes a plurality of aluminum bars, each of which is located in the second air duct, and each of which is connected to a corresponding tab, and each of which connects the battery cells of the battery module; Wherein, the ventilation channel is provided between adjacent battery cells in the battery module.

9. The battery pack according to claim 8, characterized in that: It includes an insulating baffle, which is located in the second air duct and between each aluminum bar and the side plate body.

10. The battery pack according to claim 9, characterized in that: The insulating baffle includes a main baffle and side baffles arranged on both sides of the main baffle; The main baffle is located in the second air duct and between the aluminum bar and the side panel body; The two side baffles are respectively connected to two sides of the battery module along a direction perpendicular to the main board.

Images