Battery pack top cover and battery pack

Abstract

The utility model provides a battery pack top cover and a battery pack, the battery pack top cover comprises a protruding part, a top cover body located at the periphery of the protruding part and a connecting part connected between the protruding part and the top cover body, and a height difference exists between the top of the top cover body and the top of the protruding part. The top of the connecting part is provided with a reinforcing assembly connected between the top of the top cover body and the top of the protruding part. According to the battery pack top cover provided by the utility model, the reinforcing component for connecting the top of the top cover body with the top of the lug boss is arranged at the top of the connecting part, so that the structural strength between the top of the top cover body and the top of the lug boss, which have height difference, in the battery pack top cover is enhanced; therefore, it is guaranteed that the battery pack top cover is not prone to deformation in the demolding process.

Description

TECHNICAL FIELD

[0001] The utility model relates to a battery field, concretely relates to a battery pack top cover and battery pack. BACKGROUND

[0002] The top cover of the battery pack may be deformed in the demolding process, which causes the top cover to fail to seal the box tightly, thereby affecting the air tightness of the battery pack and the assembly of the battery pack. SUMMARY

[0003] The embodiment of the utility model provides a battery pack top cover and battery pack, can solve the problem that the battery pack top cover is easy to deform in the demolding process.

[0004] In a first aspect, the embodiment of the utility model provides a battery pack top cover, and the battery pack top cover comprises:

[0005] The protruding part;

[0006] The top cover body is located at the periphery of the protruding part;

[0007] The connecting part is connected between the protruding part and the top cover body;

[0008] The top of the top cover body and the top of the protruding part have a height difference, and the top of the connecting part is provided with a reinforcing assembly connected between the top of the top cover body and the top of the protruding part.

[0009] In an embodiment, the top cover body comprises a first body part and a second body part, the first body part is located at one side of the protruding part in the length direction of the battery pack top cover, and the second body part is located at one side of the protruding part in the width direction of the battery pack top cover;

[0010] The reinforcing assembly comprises a plurality of first reinforcing pieces and a plurality of second reinforcing pieces, the plurality of first reinforcing pieces are connected between the top of the first body part and the top of the protruding part, and the plurality of second reinforcing pieces are connected between the top of the second body part and the top of the protruding part; wherein the size of the first reinforcing piece in the length direction is greater than the size of the second reinforcing piece in the width direction.

[0011] In an embodiment, the first reinforcing piece comprises a first side surface, and the first side surface is connected between the top of the first body part and the top of the protruding part; wherein the first side surface comprises a plane part, and the included angle between the plane part and the plane where the top of the first body part is located is 10° to 20°.

[0012] In an embodiment, the first side surface comprises a first portion and a second portion, the first portion is connected between the top of the first body portion and the second portion, and the second portion is connected between the first portion and the top of the protruding portion; wherein the first portion is a planar portion, and the size of the orthographic projection of the first portion on the plane where the first body portion is located is greater than the size of the orthographic projection of the second portion on the plane where the first body portion is located in the length direction of the battery pack top cover.

[0013] In an embodiment, the second side surface comprises a first portion, a second portion and a third portion, the first portion is connected between the top of the second body portion and the second portion, the second portion is connected between the first portion and the third portion, and the third portion is connected between the second portion and the top of the protruding portion; wherein the second portion is a planar portion.

[0014] In an embodiment, the second side surface comprises a first portion, a second portion and a third portion, the first portion is connected between the top of the second body portion and the second portion, the second portion is connected between the first portion and the third portion, and the third portion is connected between the second portion and the top of the protruding portion; wherein the second portion is a planar portion.

[0015] In an embodiment, the top cover body further comprises a third body portion, the third body portion is located on the other side of the protruding portion in the length direction;

[0016] The reinforcing assembly further comprises a plurality of third reinforcing members connected between the top of the third body portion and the top of the protruding portion; wherein the size of the first reinforcing member in the length direction is greater than the size of the third reinforcing member in the length direction.

[0017] In an embodiment, the distance between two adjacent third reinforcing members in the width direction is greater than the distance between two adjacent second reinforcing members in the length direction, and the distance between two adjacent first reinforcing members in the width direction is less than the distance between two adjacent second reinforcing members in the length direction.

[0018] In an embodiment, the distance between two adjacent first reinforcing members in the width direction is 15mm to 20mm, the distance between two adjacent second reinforcing members in the length direction is 20mm to 25mm, and the distance between two adjacent third reinforcing members in the width direction is 25mm to 30mm.

[0019] In an embodiment, the bottom of the first body portion is provided with a first reinforcing structure, the bottom of the protruding portion is provided with a second reinforcing structure, the bottom of the connecting portion is provided with a third reinforcing structure, and the third reinforcing structure is connected between the first reinforcing structure and the second reinforcing structure.

[0020] In an embodiment, the first reinforcing structure comprises a plurality of first repeating units, the second reinforcing structure comprises a plurality of second repeating units, and the third reinforcing structure comprises a plurality of third repeating units, and the structures of the first repeating units, the second repeating units and the third repeating units are the same.

[0021] wherein, in the length direction of the top cover body, the distance between the centers of two adjacent first repeating units is greater than the distance between the centers of two adjacent second repeating units, and the distance between the centers of two adjacent second repeating units is greater than the distance between the centers of two adjacent third repeating units.

[0022] In an embodiment, the first reinforcing structure, the second reinforcing structure and the third reinforcing structure each comprise:

[0023] a plurality of first reinforcing components, each column of first reinforcing components comprising at least two first annular ribs and at least one first strip rib, each first strip rib being connected between two adjacent first annular ribs;

[0024] a plurality of second reinforcing components, each column of second reinforcing components comprising at least two second annular ribs and at least one second strip rib, each second strip rib being connected between two adjacent second annular ribs, and each column of second annular ribs being located between two adjacent columns of first annular ribs and being staggered.

[0025] a plurality of third strip ribs, each third strip rib being connected between a corresponding second annular rib and an adjacent first strip rib;

[0026] a plurality of fourth strip ribs, each fourth strip rib being connected between a corresponding second annular rib and an adjacent first annular rib.

[0027] In an embodiment, in the length direction of the top cover body, the distance between the centers of two adjacent first repeating units is 90mm to 100mm, the distance between the centers of two adjacent second repeating units is 40mm to 50mm, and the distance between the centers of two adjacent third repeating units is 30mm to 40mm.

[0028] In a second aspect, an embodiment of the utility model provides a battery pack, comprising the battery pack top cover and the box body of the first aspect, and the battery pack is used for sealing the box body.

[0029] The utility model provides a kind of battery pack top cover and battery pack, and the battery pack top cover includes protruding portion, top cover body located in the periphery of protruding portion and connecting portion connected between protruding portion and top cover body, and the top of top cover body and the top of protruding portion have height difference between the top of top cover body and the top of protruding portion, and the top of connecting portion is equipped with the reinforcing component connected between the top of top cover body and the top of protruding portion.By being equipped with the reinforcing component connecting the top of top cover body and the top of protruding portion in the top of connecting portion, the structural strength between the top of top cover body and the top of protruding portion with height difference in battery pack top cover is enhanced, to ensure that battery pack top cover is not prone to deformation in the process of demoulding. BRIEF DESCRIPTION OF DRAWINGS

[0030] In order to more clearly illustrate the technical scheme in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0031] Figure 1 is a structural schematic diagram of a battery pack provided by the embodiments of the present application;

[0032] Figure 2 is Figure 1 is a structural schematic diagram of a battery pack top cover in the

[0033] Figure 3 is Figure 2 is a front view of the battery pack top cover in the

[0034] Figure 4 is Figure 2 is a bottom view of the battery pack top cover in the

[0035] Figure 5 is Figure 2 is a bottom view of the battery pack top cover in the

[0036] Mark explanation:

[0037] 100, battery pack top cover; 111, first body part; 112, second body part; 113, third body part; 120, protruding part; 130, connecting part; 141, first reinforcing part; 142, second reinforcing part; 143, third reinforcing part; 151, first repeating unit; 152, second repeating unit; 153, third repeating unit; 161, first annular rib; 162, first strip rib; 171, second annular rib; 172, second strip rib; 180, third strip rib; 190, fourth strip rib; 200, box body; 300, battery pack. DETAILED DESCRIPTION

[0038] The technical solutions in the embodiments of the present application will be clearly and completely described with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of the present application. In addition, it should be understood that the specific implementation described herein is only used to illustrate and explain the present application, and is not used to limit the present application. In the present application, the orientation words such as "upper" and "lower" generally refer to the upper and lower directions of the device in the actual use or working state, and specifically refer to the drawing direction in the drawings. The "inner" and "outer" refer to the contour of the device.

[0039] In order to solve the problem that the structure of the top cover of the battery pack is easy to deform during demolding, the embodiments of the present application provide a battery pack top cover 100, which is used for sealing a box body 200 to constitute a battery pack 300, as shown in Figure 1 , Figure 1 is a structural schematic view of the battery pack 300 provided by the embodiments of the present application. Please refer to Figure 2 , Figure 2 is a structural schematic view of the battery pack top cover 100 in Figure 1 , the battery pack top cover 100 comprises a top cover body, a protruding part 120 and a connecting part 130, the protruding part 120 is formed by the bottom of the battery pack top cover 100 being recessed towards the top of the battery pack top cover 100, the top cover body is located at the periphery of the protruding part 120, there is a height difference between the top of the top cover body and the top of the protruding part 120, the connecting part 130 is connected between the protruding part 120 and the top cover body, and a reinforcing assembly connected between the top of the top cover body and the top of the protruding part 120 is arranged at the top of the connecting part 130, for enhancing the structural strength of the battery pack top cover 100.

[0040] The battery pack top cover 100 provided by the embodiments enhances the structural strength between the top of the top cover body and the top of the protruding part 120 in the battery pack top cover 100 with a height difference, by arranging the reinforcing assembly connecting the top of the top cover body and the top of the protruding part 120 at the top of the connecting part 130, so as to ensure that the battery pack top cover 100 is not easy to deform during demolding.

[0041] In some embodiments, please refer to Figure 2 and Figure 3 , Figure 3 is Figure 2In the front view of the battery pack top cover 100, the top cover body includes a first body part 111 and a second body part 112, the first body part 111 is located on one side of the protruding part 120 in the length direction of the battery pack top cover 100, the second body part 112 is located on one side of the protruding part 120 in the width direction of the battery pack top cover 100, the reinforcing assembly includes a plurality of first reinforcing members 141 and a plurality of second reinforcing members 142, the plurality of first reinforcing members 141 are connected between the top of the first body part 111 and the top of the protruding part 120, the plurality of second reinforcing members 142 are connected between the top of the second body part 112 and the top of the protruding part 120, and the size D1 of the first reinforcing member 141 in the length direction of the battery pack top cover 100 is greater than the size D2 of the second reinforcing member 142 in the width direction of the battery pack top cover 100.

[0042] Specifically, in the process of demolding, the position between the top of the top cover body and the top of the protruding part 120 is subjected to the maximum stress, while other positions are subjected to relatively small stress, so as to ensure that the structural strength of the position can meet the requirement of not being easily deformed under the influence of stress, and because the longer the length of the reinforcing member generally means that the reinforcing member structure can more effectively release stress when stressed, the size D1 of the first reinforcing member 141 in the length direction of the battery pack top cover 100 is designed to be greater than the size D2 of the second reinforcing member 142 in the width direction of the battery pack top cover 100, thereby improving the overall stability and strength of the structure of the battery pack top cover 100.

[0043] In some embodiments, the first reinforcing member includes a first side surface connected between the top of the first body part and the top of the protruding part, and the first side surface includes a planar part, and the included angle between the planar part and the plane where the top of the first body part is located is 10° to 20°.

[0044] Specifically, when the height difference between the top of the first body part and the top of the protruding part 120 is constant, the smaller the included angle between the planar part of the first side surface of the first reinforcing member and the plane where the top of the first body part is located, the larger the size of the orthogonal projection of the first reinforcing member on the plane where the top of the first body part is located, so that the stress can be effectively released when stressed, and therefore the included angle between the two is designed to be not greater than 20°. In addition, if the included angle between the two is too small, the size of the first reinforcing member will be too large, which will increase the production cost of the first reinforcing member, and therefore the included angle between the two is designed to be not less than 10°.

[0045] In some embodiments, the first side of the first reinforcing member comprises a first portion and a second portion, the first portion is connected between the top of the first body portion and the second portion, and the second portion is connected between the first portion and the top of the protruding portion; wherein the first portion is a planar portion, and the size of the orthographic projection of the first portion on the plane where the first body portion is located is greater than the size of the orthographic projection of the second portion on the plane where the first body portion is located in the length direction of the top cover of the battery pack. In this embodiment, the size of the orthographic projection of the first portion on the plane where the first body portion is located is designed to be greater than the size of the orthographic projection of the second portion on the plane where the first body portion is located, which can effectively release stress.

[0046] In some embodiments, the second reinforcing member comprises a second side connected between the top of the second body portion and the top of the protruding portion. The second side comprises a planar portion, and the angle between the planar portion and the plane where the top of the second body portion is located is 75° to 85°.

[0047] Specifically, when the height difference between the top of the second body portion and the top of the protruding portion 120 is constant, and the width of the second body portion is small, the angle between the planar portion of the second side and the plane where the top of the second body portion is located is designed to be 75° to 85°, which can ensure that the orthographic projection size of the second reinforcing member on the plane where the top of the second body portion is located is large, and stress can be effectively released.

[0048] In some embodiments, the second side of the second reinforcing member comprises a first portion, a second portion and a third portion, wherein the first portion is connected between the top of the second body portion and the second portion, the second portion is connected between the first portion and the third portion, and the third portion is connected between the second portion and the top of the protruding portion; wherein the second portion is a planar portion. In this embodiment, experiments have proved that the second portion located between the first portion and the third portion is designed to be planar, which can better release stress.

[0049] On the basis that the top cover body comprises the first body portion 111 and the second body portion 112, in some embodiments, please refer to Figure 3 , the top cover body further comprises a third body portion 113, and the third body portion 113 is located on the other side of the protruding portion 120 in the length direction of the top cover 100 of the battery pack, and is arranged opposite to the first body portion 111. In addition, the reinforcing assembly further comprises a plurality of third reinforcing members 143, and the plurality of third reinforcing members 143 are connected between the top of the third body portion 113 and the top of the protruding portion 120. At the same time, the size of the first reinforcing member 141 in the length direction is greater than the size of the third reinforcing member 143 in the length direction.

[0050] Specifically, the side of the protruding portion 120 away from the first body portion 111 is provided with a third body portion 113, and in the thickness direction of the top cover body, the height of the third body portion 113 is less than the height of the protruding portion 120, a plurality of third reinforcing members 143 are arranged between the top of the third body portion 113 and the top of the protruding portion 120 to further enhance the stress release capability of the battery pack top cover 100, so that the battery pack top cover 100 is less likely to deform during demolding, and the size D1 of the first reinforcing member 141 in the length direction of the battery pack top cover 100 is designed to be greater than the size D3 of the third reinforcing member 143 in the length direction, which has the same principle as the above-mentioned design of the size D1 of the first reinforcing member 141 in the length direction of the battery pack top cover 100 being greater than the size D2 of the second reinforcing member 142 in the width direction of the battery pack top cover 100, which can be referred to the above description and will not be repeated here.

[0051] In some embodiments, the spacing X1 between two adjacent first reinforcing members 141 in the width direction of the battery pack top cover 100 is a first spacing, the spacing X2 between two adjacent second reinforcing members 142 in the length direction of the battery pack top cover 100 is a second spacing, and the spacing X3 between two adjacent third reinforcing members 143 in the width direction of the battery pack top cover 100 is a third spacing, wherein the first spacing is less than the second spacing, and the second spacing is less than the third spacing.

[0052] Specifically, the smaller the spacing between two adjacent reinforcing ribs, the easier it is for the stress on the battery pack top cover 100 to be released from this position. Therefore, in the present embodiment, the first spacing is designed to be less than the second spacing, and the second spacing is designed to be less than the third spacing, so that the stress on the battery pack top cover 100 during demolding can be released from the third reinforcing member 143, thereby achieving stress release of the battery pack top cover 100 to prevent structural deformation of the battery pack top cover 100 caused by excessive stress.

[0053] In some embodiments, the spacing X1 between two adjacent first reinforcing members 141 in the width direction is 15-20 mm, the spacing X2 between two adjacent second reinforcing members 142 in the length direction is 20-25 mm, and the spacing X3 between two adjacent third reinforcing members 143 in the width direction is 25-30 mm.

[0054] In the production of the battery pack top cover 100, the length of the product obtained in actual production is considered, and at the same time, the stress on the protruding portion 120 during demolding is released from the second body portion 112 and the third body portion 113, so that the interval X1, the interval X2 and the interval X3 are designed in the above range, which can ensure that the structure of the battery pack top cover 100 can release the stress during demolding.

[0055] In some embodiments, referring to Figure 2 and Figure 4 , Figure 4 is Figure 2 the bottom of the first body portion 111 is provided with a first reinforcing structure, the bottom of the protruding portion 120 is provided with a second reinforcing structure, the bottom of the connecting portion 130 is provided with a third reinforcing structure, and the third reinforcing structure is connected between the first reinforcing structure and the second reinforcing structure. Specifically, in order to further improve the structural strength of the battery pack top cover 100, the first reinforcing structure, the second reinforcing structure and the third reinforcing structure are respectively arranged at the bottom of the first body portion 111, the bottom of the protruding portion 120 and the bottom of the connecting portion 130, which can enhance the bending and tensile resistance of the battery pack 300 cover plate, so that the battery pack top cover 100 is less likely to deform during demolding.

[0056] In some embodiments, referring to Figure 4 , the first reinforcing structure includes a plurality of first repeating units 151, the second reinforcing structure includes a plurality of second repeating units 152, the third reinforcing structure includes a plurality of third repeating units 153, and the structures of the first repeating units 151, the second repeating units 152 and the third repeating units 153 are the same. In the length direction of the top cover body, the distance L1 between the centers of two adjacent first repeating units 151 is greater than the distance L2 between the centers of two adjacent second repeating units 152, and the distance between the centers of two adjacent second repeating units 152 is greater than the distance L3 between the centers of two adjacent third repeating units 153.

[0057] Specifically, in the length direction of the top cover body, the distance L1 between the centers of two adjacent first repeating units 151 is a first center distance, the distance L2 between the centers of two adjacent second repeating units 152 is a second center distance, and the distance L3 between the centers of two adjacent third repeating units 153 is a third center distance. In this embodiment, the first center distance is designed to be the largest, and the third center distance is designed to be the smallest, so that the structure of the battery pack top cover 100 can effectively transmit the stress on the protruding portion 120 from the first reinforcing structure to the third reinforcing structure along the second reinforcing structure during demolding, and finally release the stress from the first body portion 111.

[0058] In some embodiments, please refer to Figure 5 , Figure 5 is Figure 2 a bottom view of the battery pack top cover 100 in some embodiments, the first reinforcing structure, the second reinforcing structure and the third reinforcing structure each include a plurality of first reinforcing components, a plurality of second reinforcing components, a plurality of third strip-shaped ribs 180 and a plurality of fourth strip-shaped ribs 190. Wherein each column of first reinforcing components includes at least two first annular ribs 161 and at least one first strip-shaped rib 162, each first strip-shaped rib 162 is connected between two adjacent first annular ribs 161, each column of second reinforcing components includes at least two second annular ribs 171 and at least one second strip-shaped rib 172, each second strip-shaped rib 172 is connected between two adjacent second annular ribs 171, each second annular rib 171 is located between two adjacent columns of first annular ribs 161 and is arranged staggered, each third strip-shaped rib 180 is connected between the corresponding second annular rib 171 and the adjacent first strip-shaped rib 162, and each fourth strip-shaped rib 190 is connected between the corresponding second annular rib 171 and the adjacent first annular rib 161.

[0059] Specifically, the first annular rib 161 in the first reinforcing component and the second annular rib 171 in the second reinforcing component can be uniformly distributed in different directions under stress, while the first strip-shaped rib 162 in the first reinforcing component is used to connect two adjacent first annular ribs 161, the second strip-shaped rib 172 in the second reinforcing component is used to connect two adjacent second annular ribs 171, the third strip-shaped rib 180 is used to connect the corresponding second annular rib 171 and the adjacent first strip-shaped rib 162, and the fourth strip-shaped rib 190 is used to connect the corresponding second annular rib 171 and the adjacent first annular rib 161, which can maintain the distance and relative position between the first annular rib 161 and the first annular rib 161, the first annular rib 161 and the second annular rib 171, to ensure that the reinforcing components can work cooperatively when the structure is stressed, so as to effectively transfer and release stress.

[0060] In some embodiments, in the length direction of the top cover body, the distance L1 between the centers of two adjacent first repeating units 151 is 90mm to 100mm, the distance L2 between the centers of two adjacent second repeating units 152 is 40mm to 50mm, and the distance L3 between the centers of two adjacent third repeating units 153 is 30mm to 40mm.

[0061] In the production of the battery pack top cover 100, the length of the product obtained in the actual production of the battery pack top cover 100 is considered, and at the same time, the stress received by the protruding portion 120 of the battery pack top cover 100 during demolding can be released from the first reinforcing structure along the second reinforcing structure and finally from the third reinforcing structure, so that in an embodiment, the two adjacent center distances L1, the two adjacent center distances L2 and the two adjacent center distances L3 are designed to be in the above range, so that the structure of the battery pack top cover 100 can be better released during demolding.

[0062] The utility model provides a kind of battery pack top cover 100 including protruding portion 120, top cover body located in the periphery of protruding portion 120 and connecting portion 130 connected between protruding portion 120 and top cover body, the top of top cover body and the top of protruding portion 120 have height difference between, the top of connecting portion 130 is equipped with the reinforcing assembly connected between the top of top cover body and the top of protruding portion 120.By being equipped with the reinforcing assembly connecting the top of top cover body and the top of protruding portion 120 in the top of connecting portion 130, the structural strength between the top of top cover body and the top of protruding portion 120 in battery pack top cover 100 with height difference is enhanced, to ensure that battery pack top cover 100 is not easy to deform during demolding.

[0063] The utility model embodiment further provides a kind of battery pack 300, the battery pack 300 includes above-mentioned battery pack top cover 100 and box 200, and the battery pack 300 is used to seal the box 200.The battery pack 300 has all the advantages of the above-mentioned battery pack top cover 100, which will not be repeated here.

[0064] The above embodiments of the utility model are described in detail, and the principles and implementation modes of the utility model are described by applying specific examples in this paper.The above embodiment is only used to help understand the method and core idea of the utility model;At the same time, for those skilled in the art, according to the idea of the utility model, the specific implementation mode and application range will be changed, and the above description should not be understood as the limitation of the utility model.

Claims

1. A battery pack top cover, characterized by, The battery pack top cover comprises: a protruding portion; a top cover body located at the periphery of the protruding portion; a connecting portion connected between the protruding portion and the top cover body; wherein the top of the top cover body and the top of the protruding portion have a height difference, and the top of the connecting portion is provided with a reinforcing assembly connected between the top of the top cover body and the top of the protruding portion.

2. The battery pack top cover of claim 1, wherein, The top cover body comprises a first body portion located at one side of the protruding portion in the length direction of the battery pack top cover and a second body portion located at one side of the protruding portion in the width direction of the battery pack top cover; The reinforcing assembly comprises a plurality of first reinforcing members connected between the top of the first body portion and the top of the protruding portion, and a plurality of second reinforcing members connected between the top of the second body portion and the top of the protruding portion; wherein the size of the first reinforcing member in the length direction is greater than the size of the second reinforcing member in the width direction.

3. The battery pack top cover of claim 2, wherein, The first reinforcing member comprises a first side surface connected between the top of the first body portion and the top of the protruding portion; wherein the first side surface comprises a planar portion, and the included angle between the planar portion and the plane where the top of the first body portion is located is 10° to 20°.

4. The battery pack top cover of claim 3, wherein, The first side surface comprises a first portion connected between the top of the first body portion and a second portion, and the second portion is connected between the first portion and the top of the protruding portion; wherein the first portion is the planar portion, and in the length direction of the battery pack top cover, the size of the orthographic projection of the first portion on the plane where the first body portion is located is greater than the size of the orthographic projection of the second portion on the plane where the first body portion is located.

5. The battery pack top cover of claim 2, wherein, The second reinforcing member comprises a second side surface connected between the top of the second body portion and the top of the protruding portion; wherein the second side surface comprises a planar portion, and the included angle between the planar portion and the plane where the top of the second body portion is located is 75° to 85°.

6. The battery pack top cover of claim 5, wherein, The second side surface comprises a first portion, a second portion and a third portion, the first portion is connected between the top of the second body portion and the second portion, the second portion is connected between the first portion and the third portion, and the third portion is connected between the second portion and the top of the protruding portion; wherein the second portion is the planar portion.

7. The battery pack top cover of claim 2, wherein, The top cover body further comprises a third body portion located at the other side of the protruding portion in the length direction; The reinforcing assembly further comprises a plurality of third reinforcing members connected between the top of the third body portion and the top of the protruding portion; wherein the size of the first reinforcing member in the length direction is greater than the size of the third reinforcing member in the length direction.

8. The battery pack top cover of claim 7, wherein, The distance between two adjacent third reinforcing members in the width direction is greater than the distance between two adjacent second reinforcing members in the length direction, and the distance between two adjacent first reinforcing members in the width direction is less than the distance between two adjacent second reinforcing members in the length direction.

9. The battery pack top cover of claim 8, wherein, The distance between two adjacent first reinforcing members in the width direction is 15-20 mm, the distance between two adjacent second reinforcing members in the length direction is 20-25 mm, and the distance between two adjacent third reinforcing members in the width direction is 25-30 mm.

10. The battery pack top cover of claim 2, wherein, The bottom of the first body portion is provided with a first reinforcing structure, the bottom of the protruding portion is provided with a second reinforcing structure, and the bottom of the connecting portion is provided with a third reinforcing structure connected between the first reinforcing structure and the second reinforcing structure.

11. The battery pack top cover of claim 10, wherein, The first reinforcing structure comprises a plurality of first repeating units, the second reinforcing structure comprises a plurality of second repeating units, and the third reinforcing structure comprises a plurality of third repeating units, and the first repeating units, the second repeating units, and the third repeating units have the same structure. In the length direction of the roof body, the distance between the centers of two adjacent first repeating units is greater than the distance between the centers of two adjacent second repeating units, and the distance between the centers of two adjacent second repeating units is greater than the distance between the centers of two adjacent third repeating units.

12. The battery pack top cover of claim 10, wherein, The first reinforcing structure, the second reinforcing structure, and the third reinforcing structure each comprise: a plurality of columns of first reinforcing assemblies, each column of first reinforcing assemblies comprising at least two first annular ribs and at least one first strip-shaped rib, each first strip-shaped rib being connected between two adjacent first annular ribs; a plurality of columns of second reinforcing assemblies, each column of second reinforcing assemblies comprising at least two second annular ribs and at least one second strip-shaped rib, each second strip-shaped rib being connected between two adjacent second annular ribs, and each column of second annular ribs being located between two adjacent columns of first annular ribs and being staggered; a plurality of third strip-shaped ribs, each third strip-shaped rib being connected between a corresponding second annular rib and an adjacent first strip-shaped rib; a plurality of fourth strip-shaped ribs, each fourth strip-shaped rib being connected between a corresponding second annular rib and an adjacent first annular rib.

13. The battery pack top cover of claim 11, wherein, In the length direction of the roof body, the distance between the centers of two adjacent first repeating units is 90-100 mm, the distance between the centers of two adjacent second repeating units is 40-50 mm, and the distance between the centers of two adjacent third repeating units is 30-40 mm.

14. A battery pack, characterized by The battery pack top cover and the box body according to any one of claims 1-13 are used to seal the box body.

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