Battery pack box shell and battery pack

Abstract

The battery pack box shell comprises a battery main shell, a sealing strip and a cover body, a sealing matching groove is formed in the outer side wall of the battery main shell, the sealing strip is arranged in the sealing matching groove, and the cover body is provided with a top plate and a first side plate located on the edge of the top plate; and when the cover body is connected with the battery main shell, the sealing strip is compressed and configured between the first side plate and the battery main shell. The sealing matching groove is formed in the outer side wall of the battery shell, when the sealing strip is arranged in the sealing matching groove, the groove walls of the two sides, in the width direction, of the sealing matching groove are limited to the two sides of the sealing strip, gluing is not needed between the outer side wall and the sealing strip, the assembly technology is simplified, the assembly efficiency is improved, the stability of the sealing structure is high, and the sealing effect is good. The durability is good.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery pack technical field more specifically, relate to a battery pack box shell and battery pack. BACKGROUND

[0002] In recent years, with the development of new energy technology, electric commercial vehicles emerge as the times require, compared with fuel vehicles, electric commercial vehicles are more energy saving and environmental protection, have become an important measure for the world to speed up the transformation of transportation energy, and are accepted and recognized by more and more consumers. As the core component of electric commercial vehicles, power battery is usually arranged at the back or chassis of the whole vehicle, therefore, the sealing requirement of power battery is extremely high, if the sealing structure of power battery is unreliable, water will enter the power battery and cause short circuit or fire and other adverse accidents.

[0003] The traditional sealing mode of power battery generally adopts glueing process and sealing strip process, the glueing process and sealing strip process have some problems, regarding the glueing process, the glue will pollute when solidifying, affecting efficiency and employee health. Regarding the sealing strip process, there is usually no limiting structure between the battery main shell and the cover, the sealing strip will appear material extension in the compression process due to the physical properties of its material, and without limiting constraint, serious deformation displacement problem is prone to appear, thereby the sealing effect is poor, and the sealing structure durability is poor. SUMMARY

[0004] In order to solve one of the above technical defects, the application embodiment provides a battery pack box shell and battery pack.

[0005] The application adopts the following technical scheme:

[0006] The first purpose of the application is to provide a battery pack box shell, which comprises:

[0007] A battery main shell, a sealing matching groove is arranged on the outer side wall of the battery main shell;

[0008] A sealing strip, the sealing strip is arranged in the sealing matching groove;

[0009] A cover, the cover has a top plate and a first side plate located at the edge of the top plate;

[0010] In the state that the cover and the battery main shell are connected, the sealing strip is arranged between the first side plate and the battery main shell in a compressed manner.

[0011] Optionally, two convex strips are arranged on the outer side wall of the battery main shell, and the sealing matching groove is formed between the two convex strips;

[0012] The sealing strip is located between the two convex strips;

[0013] The first side plate is attached to two of the convex strips.

[0014] Optionally, an end of the convex strip away from the first side plate is provided with a smooth convex arc surface.

[0015] Optionally, in a state where the battery main shell and the cover are separated, the thickness of the sealing strip is greater than the width of the convex strip, and the width of the sealing strip is less than the width of the sealing fitting groove.

[0016] In a state where the battery main shell and the cover are connected, the two sides of the sealing strip along the thickness direction are respectively attached to the first side plate and the battery main shell.

[0017] Optionally, the battery main shell has a bottom plate and a second side plate.

[0018] The second side plate is connected to the bottom plate.

[0019] The sealing fitting groove is provided on the second side plate.

[0020] Optionally, the battery pack shell includes a fastener.

[0021] One end of the fastener passes through the first side plate and is connected to the bottom plate, and the other end of the fastener is limited in the first side plate.

[0022] Optionally, the bottom plate is provided with a through-hole pull rivet nut.

[0023] The fastener includes a screw rod and a cap body connected to the screw rod.

[0024] The screw rod passes through the first side plate and is threadedly connected to the through-hole pull rivet nut, and the cap body is limited on the outer surface of the first side plate.

[0025] Optionally, the bottom plate has a cooling water channel.

[0026] Optionally, the battery main shell is an integrally formed by extrusion.

[0027] The second purpose of the present application is to provide a battery pack, comprising:

[0028] The battery pack shell described above, the cavity is formed between the battery main shell and the cover.

[0029] The battery module is provided in the cavity.

[0030] By adopting the above technical scheme, the present application has the following beneficial effects:

[0031] The application is provided with a sealing fitting groove on the outer side wall of the battery shell, when the sealing strip is placed in the sealing fitting groove, the two side groove walls of the sealing fitting groove in the width direction are limited on both sides of the sealing strip, without gluing between the outer side wall and the sealing strip, the assembly process is simplified, the assembly efficiency is improved, and the stability and durability of the sealing structure are high.

[0032] The specific embodiments of the utility model will be further described in detail below with reference to the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0033] The drawings are part of the application and serve to provide a further understanding of the utility model, the schematic embodiments of the utility model and the description thereof serve to explain the utility model, but do not constitute improper limitation on the utility model. Obviously, the drawings in the following description are only some embodiments, and other drawings can be obtained by those skilled in the art without creative labor. In the drawings:

[0034] Figure 1 A sectional view of the partial structure of the battery pack box shell provided by the embodiment of the present disclosure is shown.

[0035] It should be noted that these drawings and written descriptions are not intended to limit the scope of the concept of the utility model in any way, but to illustrate the concept of the utility model to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments will be described clearly and completely below with reference to the drawings in the embodiments of the utility model, and the following embodiments are used to illustrate the utility model, but not to limit the scope of the utility model.

[0037] In the description of the utility model, it should be noted that the terms "upper", "lower", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the devices or components referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation on the utility model.

[0038] In the description of the utility model, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected, it can be mechanical connection, or electrical connection, it can be directly connected, or indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0039] Referring to Figure 1 As shown in the drawings, the battery pack shell provided by the embodiments of the present application comprises a battery main shell, a sealing strip 8 and a cover. The outer side wall of the battery main shell 31 is provided with a sealing fitting groove, the sealing strip 8 is arranged in the sealing fitting groove, and the cover has a top plate and a first side plate 32 located at the edge of the top plate. In the state that the cover and the battery main shell are connected, the sealing strip 8 is arranged in compression between the first side plate 32 and the battery main shell.

[0040] The sealing fitting groove is arranged on the outer side wall of the battery shell. When the sealing strip 8 is arranged in the sealing fitting groove, the two side walls of the sealing fitting groove along the width direction limit the two sides of the sealing strip 8. Therefore, it is not necessary to glue between the outer side wall and the sealing strip, the assembly process is simplified, the assembly efficiency is improved, and the stability and durability of the sealing structure are high.

[0041] In some possible embodiments, the outer side wall of the battery main shell is provided with two convex strips 3121, the sealing fitting groove is formed between the two convex strips 3121, the sealing strip 8 is located between the two convex strips 3121, and the first side plate 32 is attached to the two convex strips 3121.

[0042] The two convex strips 3121 limit the two sides of the sealing strip 8 along the width direction. When the battery main shell and the cover are connected, the sealing strip 8 is compressed and deformed. Because the two convex strips 3121 are arranged, the maximum deformation amount of the sealing strip 8 is limited, and the convex strips 3121 limit the position of the sealing strip 8, preventing the sealing strip 8 from being seriously displaced and affecting the sealing effect.

[0043] In some possible embodiments, the end of the convex strip 3121 away from the first side plate 32 is provided with a smooth convex arc surface. The structure is simple, the friction between the convex strip 3121 and the cover is reduced, and the service life is prolonged. Compared with the convex strip 3121 with a flat top, the convex strip 3121 with a circular arc top is simpler in production process and easier to produce. For example, the battery main shell is an integral part formed by extrusion. The battery main shell is more suitable for producing a structure with a circular arc transition on the surface by using an extrusion forming process.

[0044] In some possible embodiments, the sealing strip 8 has a thickness greater than the width of the protrusions 3121 when the battery main shell and the cover are separated, so that the sealing strip 8 can abut against the inner wall of the cover when the battery main shell and the cover are connected. The sealing strip 8 has a width less than the width of the sealing groove, and the two sides of the sealing strip 8 in the thickness direction abut against the first side plate 32 and the battery main shell respectively when the battery main shell and the cover are connected. When the sealing strip 8 is pressed by the cover, the width of the sealing strip 8 increases, but the width is not greater than the spacing between the two protrusions 3121, and the sealing strip 8 does not deviate from the space between the two protrusions 3121. In combination with the adhesion of the sealing strip 8, the sealing strip 8 can effectively seal the gap between the battery main shell and the cover for a long time. The application realizes the elimination of glue and gasket fixing, greatly improving the stability and assembly efficiency.

[0045] In some possible embodiments, the battery main shell has a bottom plate 311 and a second side plate 312 connected to the bottom plate 311, and the sealing groove is arranged on the second side plate 312. At least one of the two protrusions 3121 is located on the second side plate 312. When the cover is attached to the battery main shell, the first side plate 32 of the cover naturally covers the two protrusions 3121.

[0046] In some possible embodiments, the battery pack shell includes a fastener 9, one end of which is connected to the bottom plate 311 through the first side plate 32, and the other end of the fastener 9 is limited to the first side plate 32.

[0047] The bottom plate 311 and the cover form a cavity for arranging the battery module 1, and the fastener 9 is connected to the bottom plate 311, corresponding to the lower side of the battery pack, instead of the traditional positive side, so that the fastener 9 does not penetrate into the cavity and does not affect the sealing of the battery pack. It should be noted that the fastener 9 is located on one side of the bottom of the two protrusions 3121, i.e., below the sealing position of the battery main shell and the cover, and does not affect the sealing structure.

[0048] In some possible embodiments, the bottom plate 311 is provided with a through-hole rivet nut 3113, and the fastener 9 includes a screw rod 91 and a cap 92 connected to the screw rod 91. The screw rod 91 is threadedly connected to the through-hole rivet nut 3113 through the first side plate 32, and the cap 92 is limited to the outer surface of the first side plate 32.

[0049] Because the fastener 9 is connected to the bottom plate 311 and does not penetrate the cavity of the battery pack, the traditional expensive blind hole rivet nut can be replaced with a cheap through-hole rivet nut, further saving costs and reducing the weight of the battery pack.

[0050] In some possible embodiments, the bottom plate 311 has a cooling water channel therein, liquid is introduced into the cooling water channel, and heat exchange can be performed with the battery module 1 to reduce the temperature of the battery module 1.

[0051] The application also provides a battery pack, which comprises the battery module 1 and the battery pack shell as described above, a cavity is formed between the battery main shell and the cover body, and the battery module 1 is arranged in the cavity.

[0052] The above is only the preferred embodiment of the present application, and does not limit the present application in any form. Although the preferred embodiment of the present application has been disclosed as above, it is not intended to limit the present application. Any skilled person in the art can make some changes or modifications to the above-mentioned technical content without departing from the technical solution of the present application, and equivalent embodiments with equivalent changes are equivalent. Any simple modification, equivalent change and modification of the above embodiments according to the technical essence of the present application are still within the scope of the present application.

Claims

1. A battery pack shell, characterized in that: include: A battery main housing, wherein a sealing fitting groove is provided on an outer side wall of the battery main housing; a sealing strip disposed in the sealing fitting groove; A cover body, the cover body comprising a top plate and a first side plate located at an edge of the top plate; When the cover and the battery main housing are connected, the sealing strip is compressed and arranged between the first side plate and the battery main housing.

2. The battery pack case according to claim 1, characterized in that: Two ridges are provided on the outer side wall of the battery main housing, and the sealing fitting groove is formed between the two ridges; The sealing strip is located between the two convex strips; The first side panel is attached to the two convex strips.

3. The battery pack case according to claim 2, characterized in that: The end of the convex strip away from the first side plate is provided with a smooth convex arc surface.

4. The battery pack case according to claim 2, characterized in that: When the battery main housing and the cover are separated, the thickness of the sealing strip is greater than the width of the convex strip, and the width of the sealing strip is less than the width of the sealing fitting groove; When the battery main shell and the cover are connected, two sides of the sealing strip along the thickness direction are respectively attached to the first side plate and the battery main shell.

5. The battery pack case according to claim 1, characterized in that: The battery main housing has a bottom plate and a second side plate; The second side plate is connected to the bottom plate; The sealing matching groove is arranged on the second side plate.

6. The battery pack case according to claim 5, characterized in that: including fasteners; One end of the fastener passes through the first side plate and is connected to the bottom plate, and the other end of the fastener is limited to the first side plate.

7. The battery pack case according to claim 6, characterized in that: The bottom plate is provided with a through-hole rivet nut; The fastener includes a screw and a cap connected to the screw; The screw rod passes through the first side plate and is threadedly connected to the through-hole rivet nut, and the cap body is limited to the outer surface of the first side plate.

8. The battery pack case according to claim 5, characterized in that: A cooling water channel is provided in the bottom plate.

9. The battery pack case according to any one of claims 1 to 8, characterized in that: The battery main shell is an extruded integral part.

10. A battery pack, characterized in that: include: The battery pack casing according to any one of claims 1 to 9, wherein a cavity is formed between the battery main casing and the cover; A battery module is disposed in the cavity.

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