CN220821743U

CN220821743U - Sealing structure of power battery

Info

Publication number: CN220821743U
Application number: CN202322493988.7U
Authority: CN
Inventors: 徐长成; 姜昕; 郭方平
Original assignee: Dongfeng Motor Corp
Current assignee: Dongfeng Motor Corp
Priority date: 2023-09-12
Filing date: 2023-09-12
Publication date: 2024-04-19
Anticipated expiration: 2033-09-12

Abstract

The utility model provides a sealing structure of a power battery, which relates to the technical field of power batteries. After the power battery is installed in place, the cover body seals the opening of the accommodating cavity, and the accommodating cavity forms a sealed space. The roof of box is enclosed by first turning section and first straight line section and closes, and the mounting hole interval sets up at first turning section and first straight line section, and the mounting hole at first turning section is with first distance interval distribution, and the mounting hole at first straight line section is with second distance interval distribution, and first distance is less than the second distance. The mounting hole of the first corner section is arranged at a first distance of a smaller length, so that the structural stability of the first corner section is improved, and the connecting gap between the cover body and the box body at the first corner section is reduced, so that the sealing structure can be airtight to the power battery at a higher protection level, and the service life of the power battery is prolonged.

Description

Sealing structure of power battery

Technical Field

The utility model belongs to the technical field of power batteries, and particularly relates to a sealing structure of a power battery.

Background

The power battery is a storage battery for providing driving power for vehicles, belongs to a core component of a new energy automobile, and is required to be airtight by a sealing structure when being installed in order to prolong the service life of the power battery, so that the power battery can be waterproof, dustproof and shock-resistant. With the development of society, the protection grade of the power battery needs to reach IP67 to meet the demands of users, the IP is totally called Ingress Protection, translated into the protection grade, and the IP67 is the highest protection grade under clear definition with reference to the definition in national standard GB/T4208-2017. The sealing structure is often composed of a plurality of parts, and when the parts are assembled, connection gaps are easily generated at the connection positions, so that the airtight of the power battery is not facilitated.

Disclosure of utility model

In view of the above, the present utility model provides a sealing structure of a power battery to solve the technical problem of how to improve the air tightness of the power battery.

The technical scheme provided by the embodiment of the utility model is realized as follows:

The embodiment of the utility model provides a sealing structure of a power battery, which comprises the following components:

the box body is provided with a containing cavity for installing the power battery, and one end of the containing cavity is opened;

the cover body is arranged on the top wall of the box body so as to seal the opening;

The top wall of the box body comprises a first corner section and a first straight line section, and the first straight line section is arranged at two ends of the first corner section; the first corner section and the first straight line section are respectively provided with a plurality of spaced mounting holes, the mounting holes of the first corner section are distributed at first distance intervals, the mounting holes of the first straight line section are distributed at second distance intervals, and the first distance is smaller than the second distance.

In some embodiments, the first corner section includes a first extension portion and a second extension portion, the first extension portion is connected with the second extension portion to form a corner, one ends of the first extension portion and the second extension portion, which are far away from the corner, are respectively provided with the mounting hole, and the first straight line section is located at one end of the first extension portion and the second extension portion, which are provided with the mounting hole;

wherein the first distance is set to the sum of the lengths of the first extension and the second extension.

In some embodiments, the sealing structure of the power battery further includes:

The first sealing piece is positioned between the top wall of the box body and the cover body, the first sealing piece is of a flexible structure, and the first sealing piece is at least abutted against the top wall of the box body.

In some embodiments, a side of the top wall, which is close to the cavity wall of the accommodating cavity, is a first edge, and a side of the top wall, which is close to the outer peripheral wall of the box, is a second edge; each mounting hole is spaced from the first edge more than the second edge.

In some embodiments, the cover body includes a body and a connection portion, the body is arranged to seal the opening, the connection portion is arranged around the body, and the connection portion is provided with a clearance hole matched with the mounting hole;

Wherein, the body is equipped with the strengthening rib, the strengthening rib to the sunken setting of box.

In some embodiments, the connecting part is provided with a connecting piece, the connecting part comprises a second corner section and a second straight line section, and both ends of the second corner section are provided with the second straight line section; the second corner section and the second straight line section are respectively provided with the clearance hole, the connecting piece penetrates through the clearance hole and the mounting hole, the second corner section is fixed with the first corner section through the connecting piece, and the second straight line section is fixed with the first straight line section through the connecting piece;

The two clearance holes are positioned on two sides of the reinforcing rib in the second straight line section and are symmetrically distributed by the central axis of the reinforcing rib between the two clearance holes.

In some embodiments, the reinforcing ribs are arranged at intervals, and all the reinforcing ribs are symmetrically distributed along the central axis of the body.

In some embodiments, the stiffener comprises:

The two ends of the first reinforcing rib are arranged at intervals with the connecting part;

The second reinforcing ribs are arranged in parallel and/or perpendicular to the first reinforcing ribs; and two ends of the second reinforcing rib are connected with the connecting part.

In some embodiments, two ends of the second reinforcing rib are connected with the second straight line segment; the axis of first strengthening rib passes the second turning section, the both ends of first strengthening rib with the interval of second turning section sets up.

The second sealing piece is arranged on one side, far away from the box body, of the cover body, the second sealing piece is arranged into a flexible structure, and the second sealing piece at least abuts against the connecting portion.

The embodiment of the utility model provides a sealing structure of a power battery, which comprises a box body and a cover body, wherein the box body is provided with a containing cavity with an opening at one end, and the power battery is arranged in the containing cavity. The box body is detachably connected with the cover body to open and close the opening, and after the power battery is installed in place, the cover body seals the opening of the accommodating cavity, so that the accommodating cavity forms a sealed space isolated from the outside, and airtight protection is formed for the power battery. The roof of box is enclosed by first turning section and first straight line section and closes, and the mounting hole interval sets up at first turning section and first straight line section, and the mounting hole at first turning section is with first distance interval distribution, and the mounting hole at first straight line section is with second distance interval distribution, and first distance is less than the second distance. The first corner section has the corner and is the broken line, compares in first straight line section, and the structural stability of first corner section is relatively poor to the mounting hole of first corner section is set up to the first distance of less length, has improved the structural stability of first corner section, simultaneously, and the lid is less with the joint gap of box in first corner section department, makes the seal in holding chamber higher.

On the other hand, the box body comprises a body and a connecting part, the body is provided with a reinforcing rib which is concavely arranged towards the box body, the connecting part is provided with a clearance hole which is matched with the mounting hole, the connecting part comprises a second straight line section and a second corner section, and the clearance hole is formed in the second straight line section and the second corner section; the second straight line section is in limiting connection with the first straight line section through a connecting piece, and the second corner section is in limiting connection with the first corner section through a connecting piece. And the two clearance holes which are positioned at the two sides of the reinforcing rib in the second straight line section are symmetrically distributed by the central axis of the reinforcing rib between the two clearance holes. After the cover body is tightly pressed and connected to the box body, the middle part of the body is easy to generate deformation away from the box body due to the pressing force of the connecting part, and the reinforcing ribs concavely arranged towards the box body resist the deformation of the body, so that the cover body is tightly pressed to the box body with higher planeness. The clearance holes in the two sides of the reinforcing rib are symmetrically distributed in the second straight line section, so that the reinforcing rib is loaded uniformly, the flatness of the body is further improved, the cover body is tightly pressed on the box body, and the sealing structure can be used for sealing the power battery with a higher protection level, so that the service life of the power battery is prolonged.

Drawings

FIG. 1 is a schematic cross-sectional view of a seal structure in an embodiment of the application;

FIG. 2 is a top view of a case according to an embodiment of the present application;

FIG. 3 is a schematic view of a portion of a case according to an embodiment of the present application;

FIG. 4 is a bottom view of the cover according to the embodiment of the application;

Fig. 5 is a partial schematic view of a cover according to an embodiment of the application.

Reference numerals illustrate:

1. A case; 10. a receiving chamber; 11. a first corner section; 111. a first extension; 112. a second extension; 12. a first straight line segment; 121. a first edge; 122. a second edge; 13. a mounting hole; 131. a first mounting hole; 132. a second mounting hole; 133. a third mounting hole; 2. a cover body; 21. a body; 211. reinforcing ribs; 2111. a first reinforcing rib; 2112. a second reinforcing rib; 22. a connection part; 221. a clearance hole; 222. a second corner section; 223. a second straight line segment; 3. a first seal; 4. and a second seal.

Detailed Description

The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.

The individual features described in the specific embodiments can be combined in any suitable manner, without contradiction, for example by combination of different specific features, to form different embodiments and solutions. Various combinations of the specific features of the utility model are not described in detail in order to avoid unnecessary repetition.

In the following description, references to the terms "first\second\etc. are merely to distinguish between different objects and do not indicate that the objects have the same or a relationship therebetween. It should be understood that references to orientations of "above", "below", "outside" and "inside" are all orientations in normal use, and "left" and "right" directions refer to left and right directions illustrated in the specific corresponding schematic drawings, and may or may not be left and right directions in normal use.

It should be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element. "plurality" means greater than or equal to two.

The embodiment of the utility model provides a sealing structure of a power battery, which can be applied to a vehicle-mounted scene to prolong the service life of the power battery in an automobile. Compared with the common battery, the power battery has higher discharging efficiency, larger power supply and wider working temperature range (-30-65 ℃), and can be recycled in the charged state, and has longer service life (maximum 10 years). Therefore, the power battery is mainly applied to new energy vehicles such as electric automobiles, electric bicycles, electric trains, golf carts and the like, and for convenience of explanation, the various vehicle types are collectively referred to as vehicles. It should be noted that the application scenario type of the embodiment of the present utility model is not limited to the specific structure in the embodiment of the present utility model. In actual life, vehicles need to deal with various special working conditions such as mountain lands, rainwater, pits, sand dust and the like, and the power battery is easy to generate irreversible damage under the special working conditions, so that a sealing structure is required to be arranged for protecting the power battery in order to prolong the service life of the power battery.

The embodiment of the utility model provides a sealing structure of a power battery, which comprises a box body 1 and a cover body 2 as shown in fig. 1. The box body 1 is provided with a containing cavity 10 with one end open, the power battery is installed in the containing cavity 10 through the opening, and the box body 1 is detachably connected with the cover body 2 so as to open the opening of the containing cavity 10 when needed, thereby facilitating the installation of the power battery and the maintenance of the power battery. The cover body 2 is arranged on the top wall of the box body 1 in a covering manner, and the top wall of the box body 1 is the upper end face of the box body 1 in fig. 1. After the power battery is installed in place, the cover body 2 is closed to open, a closed space is formed inside the accommodating cavity 10, and the power battery is isolated from the outside, so that the air tightness of the power battery is realized. Fig. 2 is a top view of the case 1, referring to fig. 2, the top wall of the case 1 includes a first corner section 11 and a first straight line section 12, the first straight line section 12 is in a straight line shape, and the first straight line section 12 indicates that the top wall extends in the straight line direction in the area; the first corner segment 11 is in a fold line shape, and the first corner segment 12 indicates that the extending direction of the top wall in the area is along a non-linear direction, but is arranged by two linear segments at a certain included angle. The first corner section 11 and the first straight line section 12 are all provided with a plurality of, and the both ends of every first corner section 11 all are provided with first straight line section 12, and first corner section 11 encloses with first straight line section 12 and closes the roof that forms box 1.

With continued reference to fig. 2, the first corner section 11 and the first straight section 12 are provided with a plurality of spaced mounting holes 13, the extending direction of the mounting holes 13 is perpendicular to the top wall of the case 1, and the mounting holes 13 are used for mounting and fixing the cover 2. The mounting holes 13 in the first corner segment 11 are spaced apart by a first distance L1 and the mounting holes 13 in the first straight segment 12 are spaced apart by a second distance L2, the first distance L1 being smaller than the second distance L2. In order to make the protection of the power battery meet the anti-vibration level, the wall of the accommodating cavity 10 needs to be of a certain thickness, so that in order to reduce the material consumption and the processing difficulty of the box body 1, the wall of the accommodating cavity 10 is usually composed of a plurality of parts, and all the parts are fixedly connected. Taking welded fastening as an example, the welding point is disposed at the bending position of the first corner section 11, and compared with the first straight line section 12 formed integrally, the first corner section 11 has poorer structural stability. The smaller the hole interval of mounting hole 13, the higher the connection stability of lid 2 and box 1 to the mounting hole 13 of first corner section 11 is set up to the first distance L1 of less length, has improved seal structure at the structural stability of first corner section 11, and the lid 2 is less with the junction gap of box 1 in first corner section 11 department for the seal of holding chamber 10 is higher, and this seal structure can be airtight to power battery with higher protection level, has prolonged power battery's life.

Referring to fig. 1 and 2, an embodiment of the present application provides a sealing structure of a power battery, where the sealing structure includes a case 1 and a cover 2, the cover 2 is detachably connected to the case 1 to open and close an opening, and after the power battery is installed in place, the cover 2 seals the opening of a receiving cavity 10. The roof of box 1 is enclosed by first turning section 11 and first straight line section 12 and closes, and mounting hole 13 interval sets up at first turning section 11 and first straight line section 12, and mounting hole 13 at first turning section 11 distributes with first distance L1 interval, and mounting hole 13 at first straight line section 12 distributes with second distance L2 interval, and first distance L1 is less than second distance L2. The mounting holes 13 in the first corner section 11 are arranged at smaller hole spacing intervals, so that the cover body 2 is abutted against the box body 1 at the first corner section 11, and the structural stability of the first corner section 11 is improved. At the first corner section 11, the cover body 2 is in compression connection with the box body 1 through a smaller gap, so that the tightness of the accommodating cavity 10 is improved, and the air tightness of the power battery is improved.

In some embodiments, fig. 3 is a partial schematic view of the case 1, referring to fig. 3, the first corner section 11 includes a first extension portion 111 and a second extension portion 112, and the first extension portion 111 and the second extension portion 112 are formed by connecting two straight line sections extending in different directions, and form a corner therebetween. It should be noted that, the included angle between the extending directions of the first extending portion 111 and the second extending portion 112 may be an obtuse angle, a right angle, and an acute angle, and the smaller the angle of the corner is, the larger the connecting gap between the first extending portion 111 and the second extending portion 112 is, and under the condition that the angle of the corner is smaller, the triangular reinforcing rib may be further disposed between the first extending portion 111 and the second extending portion 112 to improve structural stability. In the embodiment of the application, the corner is set to be obtuse, compared with the mode that the first extension part 111 and the second extension part 112 are connected at right angle or acute angle, the forming mode of the first corner section 11 has smaller consumable material, is convenient to implement, and has higher structural stability.

With continued reference to fig. 3, the first extension portion 111 and the second extension portion 112 are each provided with a mounting hole 13 at an end far from the corner, the mounting hole 13 defined at the end of the first extension portion 111 far from the corner is a first mounting hole 131, the mounting hole 13 defined at the end of the second extension portion 112 far from the corner is a second mounting hole 132, the mounting hole 13 defined at the first straight line segment 12 is a third mounting hole 133, and the second distance L2 is a distance between center points of two adjacent third mounting holes 133 for convenience of explanation. One end of the first straight line segment 12 is connected to one end of the first extension portion 111 where the mounting hole 13 (the first mounting hole 131) is provided, one end of the second extension portion 112 where the mounting hole 13 (the second mounting hole 132) is provided is connected to another first straight line segment 12, and the first straight line segment 12 and the first extension portion 111 (or the second extension portion 112) may be integrally formed or may be fixedly formed in a segmented manner. Taking welding fixation as an example, in the embodiment of the present application, the first straight line segment 12 and the first extension portion 111 (or the second extension portion 112) are integrally formed, and by arranging welding spots at the connection position of the first extension portion 111 and the second extension portion 112, the structural stability of the box 1 is improved, and the processing difficulty of forming the box 1 is reduced.

Referring to fig. 2 and 3, the extension lines of the first mounting hole 131 and the third mounting hole 133 intersect with the extension lines of the second mounting hole 132 and the third mounting hole 133, the intersection point is the corner, the length of the first extension portion 111 is defined as LA, the length of the second extension portion 112 is defined as LB, LA is the linear distance from the corner to the center point of the first mounting hole 131, LB is the linear distance from the corner to the center point of the second mounting hole 132, and the first distance l1=la+lb. Defining a straight line distance between the center point of the first mounting hole 131 and the center point of the second mounting hole 132 as L3, and according to the principle that the straight line between the two points is shortest, L1 is smaller than the second distance L2, so that L3 is also smaller than the second distance L2. The shorter the straight line distance between the two mounting holes 13 is, the stronger the pressing force between the two mounting holes 13 is, after the cover body 2 is mounted on the box body 1, the smaller L3 enables a larger pressing force to be formed between the first mounting hole 131 and the second mounting hole 132, the cover body 2 and the box body 1 are stably connected at the first corner section 11, and meanwhile, the first extension portion 111 and the second extension portion 112 are also stably connected. It should be noted that, the first distance L1 and the second distance L2 may be set to values according to actual conditions, and in the embodiment of the present application, the first distance L1 is less than or equal to 50mm, and the second distance L2 is less than or equal to 80mm, so that the protection level of the power battery satisfies the airtight test.

In some embodiments, referring to fig. 3, it should be noted that, in the direction of the inside and outside of the case 1, the inside of the case 1 represents a side of the case 1 near the accommodating cavity 10, and the outside of the case 1 represents a side of the case 1 far from the accommodating cavity 10, which may be understood as a side located on the outer wall of the case 1. The side of the top wall of the case 1 close to the cavity wall of the accommodating cavity 10 is a first edge 121, that is, the first edge is the edge of the inner side of the case 1; the side of the top wall of the case 1 close to the outer peripheral wall of the case 1 is a second edge 122, that is, the second edge is the edge of the outside of the case 1. The plumb distance from the first edge 121 to the second edge 122 is the wall thickness of the case 1. Each mounting hole 13 is located at a greater distance from the first edge 121 than from the second edge 122, and each mounting hole 13 is located at all mounting holes located on the first corner section 11 and the first straight line section 12; the distance from the mounting hole 13 to the first edge 121 is the plumb line length L4 of the center point of the mounting hole 13 perpendicular to the first edge 121; the distance from the mounting hole 13 to the second edge 122 is the plumb line length L5 of the center point of the mounting hole 13 perpendicular to the second edge 122. The distance L5 from the mounting hole 13 to the second edge 122 is smaller, the second edge 122 is close to the outside relative to the first edge 121, and the pressing force on the outer side of the mounting hole 13 is larger than the pressing force on the inner side of the mounting hole 13 under the condition that the cover body 2 is fixed with the box body 1.

It should be noted that, referring to fig. 3, in the embodiment of the present application, the distance between each mounting hole 13 and the first edge 121 is greater than or equal to 6mm, that is, l4 is greater than or equal to 6mm, under the condition that l5 is about 0, it is easy to know by common general knowledge that the external atmosphere needs to pass through at least l4+Δl to reach the accommodating cavity 10, where Δl is the minimum length required for the mounting hole 13 to be opened, the greater L4 is, the longer the external atmosphere enters the accommodating cavity 10, the leakage rate in the air tightness test is inversely proportional to the test time, so the greater L4 is, the smaller the leakage rate is, and the air tightness of the power battery is higher. In the embodiment of the application, the leakage rate of the accommodating cavity 10 is reduced by limiting the length of L4, so that the tightness of the accommodating cavity 10 can more easily meet the airtight test.

In some embodiments, referring to fig. 1 and 3, the airtight structure of the power battery further includes a first sealing member 3, where the first sealing member 3 is a flexible structure, and the first sealing member 3 abuts between the cover 2 and the top wall of the case 1, so as to resist vibration transmission between the case 1 and the cover 2, so that the sealing structure in the present application is resistant to vibration. The first sealing member 3 is at least abutted against the top wall of the box body 1, that is, the first sealing member 3 can be a plane structure with an opening covered, can be an annular structure avoiding the opening, and can also be an irregular structure with an opening partially covered. The first sealing member 3 is at least arranged to be an annular structure between the first edge 121 and the second edge 122 so as to shield the top wall of the box body 1, the first sealing member 3 fills the compression gap between the cover body 2 and the box body 1, the gas leakage at the joint of the cover body 2 and the box body 1 is reduced, the power battery is further protected, and the service life of the power battery is prolonged.

In some embodiments, fig. 4 is a top view of the cover 2, referring to fig. 4, the cover 2 includes a body 21 and a connecting portion 22, the body 21 is disposed corresponding to the opening, the connecting portion 22 is in a ring structure, that is, the connecting portion 22 is disposed around the periphery of the body 21, it should be noted that the body 21 and the connecting portion 22 may be integrally formed or may be formed by assembling in sections, and the fixing manner of the body 21 and the connecting portion 22 is not limited in the embodiment of the application. The connection portion 22 is provided with a clearance hole 221 which is matched with the mounting hole 13 for the screw, bolt, rivet, etc. to pass through, and the cover 2 is interlocked and fixed with the case 1 at the connection portion 22. The body 21 is provided with the reinforcing ribs 211, the reinforcing ribs 211 are concavely arranged towards the box body 1, namely, the reinforcing ribs 211 are convexly arranged towards the box body 1, the reinforcing ribs 211 and the body 21 can be processed in a segmented mode or integrally formed, and in the embodiment of the application, the reinforcing ribs 211 are integrally formed by stamping so as to save assembly procedures. The strengthening rib 211 is kept away from the liquid of the one side sunken in order to collect lid 2 roof of box 1, combine the fig. 1 to show, lid 2 installs behind box 1, connecting portion 22 compresses tightly the roof at box 1, drive the outward flange of body 21 and produce the deformation to box 1, body 21 is "shape", body 21 middle part produces the deformation that is kept away from towards box 1, and the protruding strengthening rib 211 of towards box 1 has increased the structural strength of lid 2, reduced the deformation of body 21 towards keeping away from the box 1 direction, do benefit to lid 2 and box 1 to compress tightly fixedly. In fig. 1, deformation of the cover 2 is exaggerated for easy understanding, and the deformation of the cover 2 is slightly invisible under actual conditions.

In some embodiments, fig. 5 is a partial schematic view of the cover 2, referring to fig. 5, the connecting portion 22 is provided with a connecting piece (not shown in the drawing), the connecting portion 22 includes a second corner segment 222 and a second straight segment 223, the second corner segment 222 and the second straight segment 223 are respectively provided with a plurality of second straight segments 223, two ends of the second corner segment 222 are respectively provided with a second straight segment 223, and the second corner segment 222 and the second straight segment 223 are enclosed at the edge of the body 21 to form the connecting portion 22. The second corner section 222 and the second straight section 223 are both provided with clearance holes 221, and the connecting piece passes through the clearance holes 221 and the mounting holes 13 to fix the cover body 2 and the box body 1, and it should be noted that the connecting piece can be bolts, screws, rivets, etc., and the application is not limited to the specific type of the connecting piece. The second corner section 222 is fixed to the first corner section 11 by a connecting member, and the second corner section 222 is provided with a corner by covering the first corner section. The second straight line segment 223 is fixed with the first straight line segment 12 through a connecting piece, wherein two clearance holes 221 on two sides of the second straight line segment 223 and located on two sides of the reinforcing rib 211 are symmetrically distributed by the central axis of the reinforcing rib 211 between the two clearance holes, referring to fig. 4, the clearance holes 221 on the second straight line segment 223 are equally spaced, the spacing distance is L2, the distance from the second straight line segment 223 to the central axis of the reinforcing rib 211 is L2/2, the left side and the right side of the reinforcing rib 211 of the central axis passing through the second straight line segment 223 are uniformly loaded, and accordingly the flatness that the central axis passes through the left side and the right side of the reinforcing rib 211 of the second straight line segment 223 is consistent, and then the connecting portion 22 has higher flatness. In combination with the above, the concave arrangement of the reinforcing ribs 211 makes the body 21 have a higher flatness, and the positional relationship of the clearance holes 221 makes the connecting portion 22 have a higher flatness, which in turn makes the cover 2 capable of being pressed against the case 1 with a higher flatness. After the airtight structure is arranged on the automobile body bottom plate, the airtight structure can uniformly resist the vibration of the automobile body bottom plate in the use process, further protects the power battery, improves the airtight of the power battery, and prolongs the service life of the power battery.

In some embodiments, referring to fig. 4, a plurality of reinforcing ribs 211 are arranged at intervals, the reinforcing ribs 211 may be transversely distributed, vertically distributed or alternatively cross-distributed, and all the reinforcing ribs 211 are symmetrically distributed along the central axis of the body 21, so that the body 21 is uniformly loaded and has a higher ground level, the cover 2 is tightly pressed with the box 1 at a higher ground level with fewer connecting gaps generated by the inclination of the plane of the cover 2, so that the coaxiality of the clearance hole 221 and the mounting hole 13 is higher, and the cover 2 and the box 1 are conveniently and stably connected.

In some embodiments, referring to fig. 4, the reinforcing rib 211 includes a first reinforcing rib 2111 and a second reinforcing rib 2112, both ends of the first reinforcing rib 2111 being spaced apart from the connection portion 22, i.e., both ends of the first reinforcing rib 2111 are formed on the body 21; the two ends of the second reinforcing rib 2112 are connected with the connecting part 22, namely, the two ends of the second reinforcing rib 2112 are formed on the connecting part 22, the concave cavity of the second reinforcing rib 2112 is communicated with the connecting part 22, and after the cover body 2 is pressed on the box body 1 in combination with fig. 1, the middle part of the body 21 is higher, the edge is lower, liquid flows from the middle part of the body 21 to the edge of the body 21 under the action of gravity, and the liquid in the concave cavity of the second reinforcing rib 2112 is drained to the outside through the connecting part 22, so that the top wall liquid of the cover body 2 is cleaned conveniently. It should be noted that, the second reinforcing ribs 2112 may be disposed entirely parallel to the first reinforcing ribs 2111, may be disposed entirely perpendicular to the first reinforcing ribs 2111, may be disposed partially parallel to and partially perpendicular to the first reinforcing ribs 2111, and in the embodiment of the present application, the second reinforcing ribs 2112 are disposed partially parallel to and partially perpendicular to the first reinforcing ribs 2111, and the second reinforcing ribs 2112 fill the plane of the body 21 and penetrate the first reinforcing ribs 2111, so that the second reinforcing ribs 2112 can collect the liquid in the first reinforcing ribs 2111 and finally drain the liquid to the outside.

In some embodiments, the central axis of the first reinforcing rib 2111 passes through the second corner segment 222 to fill the blank area at the body 21 corresponding to the second corner segment 222; the two ends of the first reinforcing rib 2111 are arranged at intervals with the second corner sections 222, and the second corner sections 222 with irregular shapes are arranged at intervals at the two ends of the first reinforcing rib 2111, so that the forming difficulty of the first reinforcing rib 2111 is reduced. The two ends of the second reinforcing rib 2112 are connected with the second straight-line section 223, the second straight-line section 223 is regular in shape, the through forming of the end part of the second reinforcing rib 2112 is facilitated, and the processing difficulty of the second reinforcing rib 2112 is reduced. The central axis of each first reinforcing rib 2111 passes through the second corner section 222, so that the two clearance holes 221 distributed at the left and right sides of each first reinforcing rib 2111 are symmetrically distributed with the central axis of the first reinforcing rib 2111 therebetween, so that the second straight line section 223 is uniformly loaded, and the second straight line section 223 is tightly and stably connected with the first straight line section 12. And the second corner section 222 is provided with the clearance hole 221 at a smaller second distance L2, and the connection gap between the cover 2 and the case 1 at the second corner section 222 is smaller, so that the second corner section 222 is tightly and stably connected with the first corner section 11. The sealing structure is even in loading, tight in connection, high in air tightness and stability, and stable protection of the power battery is achieved.

In some embodiments, referring to fig. 1, the sealing structure of the power battery further includes a second sealing member 4, the second sealing member 4 is disposed on a side of the cover 2 away from the case 1, the second sealing member 4 is configured as a flexible structure, after the sealing structure is mounted on the vehicle, the cover 2 is located at the bottom of the underbody, and the second sealing member 4 abuts between the cover 2 and the underbody, so as to be capable of resisting vibration transmission between the underbody and the cover 2. The second sealing member 4 may be annular, planar or irregular, and referring to fig. 4, in the present application, the second sealing member 4 is at least abutted against the connecting portion 22 to cover the connecting portion 22, and the second sealing member 4 surrounds the body 21, so as to achieve the effects of shock absorption and buffering, and fill up the connection gap of the gap hole 221, thereby further improving the air tightness of the power battery.

The foregoing description is only of the preferred embodiments of the present utility model, and is not intended to limit the scope of the present utility model.

Claims

1. A sealing structure of a power battery, characterized by comprising:

2. The sealing structure of a power battery according to claim 1, wherein the first corner section comprises a first extension portion and a second extension portion, the first extension portion is connected with the second extension portion to form a corner, one end of the first extension portion and one end of the second extension portion, which are far away from the corner, are respectively provided with the mounting hole, and the first straight line section is positioned at one end of the first extension portion and one end of the second extension portion, which are provided with the mounting hole;

3. The sealing structure of a power cell according to claim 2, characterized by further comprising:

4. The sealing structure of a power battery according to claim 1, wherein a side of the top wall, which is close to the cavity wall of the accommodating cavity, is a first edge, and a side of the top wall, which is close to the outer peripheral wall of the case, is a second edge; each mounting hole is spaced from the first edge more than the second edge.

5. The sealing structure of a power battery according to any one of claims 1 to 4, wherein the cover body includes a body and a connecting portion, the body is provided to close the opening, the connecting portion is provided around the body, and the connecting portion is provided with a clearance hole that mates with the mounting hole;

6. The sealing structure of a power battery according to claim 5, wherein the connecting part is provided with a connecting piece, the connecting part comprises a second corner section and a second straight line section, and both ends of the second corner section are provided with the second straight line section; the second corner section and the second straight line section are respectively provided with the clearance hole, the connecting piece penetrates through the clearance hole and the mounting hole, the second corner section is fixed with the first corner section through the connecting piece, and the second straight line section is fixed with the first straight line section through the connecting piece;

7. The sealing structure of a power battery according to claim 6, wherein a plurality of reinforcing ribs are provided at intervals, and all the reinforcing ribs are symmetrically distributed with a central axis of the body.

8. The sealing structure of a power cell according to claim 6, wherein the reinforcing rib includes:

9. The sealing structure of a power cell according to claim 8, wherein both ends of the second reinforcing rib are connected to the second straight line segment; the axis of first strengthening rib passes the second turning section, the both ends of first strengthening rib with the interval of second turning section sets up.

10. The sealing structure of a power cell as defined in claim 6, further comprising: