Protective cover, battery pack and vehicle

Abstract

The utility model relates to a protective cover, a battery pack and a vehicle. The protective cover comprises a top plate and at least one side plate, the buckling piece is connected with the top plate, the side plate is arranged on one side of the top plate in the direction orthogonal to the thickness direction of the top plate, the side plate comprises a side plate body and a weakening part, one end of the weakening part is connected with the side plate body, the other end of the weakening part is connected with the top plate, and the top plate is connected with the side plate body. And the weakening part can be separated from at least one of the top plate and the side plate body under the action of external force. The protective cover disclosed by the utility model is beneficial to reducing the use types of materials and is better in compatibility.

Description

Technical Field

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

[0002] With the accelerated development of the new energy vehicle industry, the performance of power batteries has also been greatly improved, and the resulting battery system voltage has also become higher and higher. Since the high-voltage copper busbars or terminals of the battery module are exposed on the outside of the battery box, they need to be covered with a protective cover to avoid the problem of accidental touch by the operator. In the related art, since different mounting bases correspond to different installation forms, and different mounting bases require different mounting forms of protective covers, there are many types of protective covers required, which increases the difficulty of material procurement, material collection, and production installation. Utility Model Content

[0003] The utility model aims to solve one of the technical problems in the related art at least to a certain extent.

[0004] To this end, an embodiment of the present invention provides a protective cover, which is helpful in reducing the types of materials used and has good compatibility.

[0005] An embodiment of the present invention further provides a battery pack.

[0006] An embodiment of the present invention further provides a vehicle.

[0007] The protective cover of an embodiment of the present invention includes: a top plate; at least one side plate, the side plate is arranged on one side of the top plate along a thickness direction perpendicular to the top plate, the side plate includes a side plate body and a weakening portion, one end of the weakening portion is connected to the side plate body, and the other end of the weakening portion is connected to the top plate, and the weakening portion can be separated from at least one of the top plate and the side plate body under the action of external force.

[0008] According to the protective cover of the embodiment of the present invention, since the weakened portion can be separated from at least one of the top panel body and the side panel body under the action of an external force, the operator can apply an external force at the location of the weakened portion to disconnect the top panel body from the side panel body. When the protective cover of the embodiment of the present invention is matched with mounting bases of different installation forms, the side panel body can be removed as needed, and of course, the side panel body can also be left intact as needed. Therefore, the protective cover of the embodiment of the present invention can be matched with mounting bases of different installation forms, thereby improving the compatibility of the protective cover and reducing the types of materials used.

[0009] In some embodiments, a plurality of relief holes are provided on the weakening portion, and the plurality of relief holes are arranged at intervals along the extension direction of the weakening portion.

[0010] In some embodiments, a thickness of an end of the weakened portion connected to the top plate is smaller than a thickness of an end of the weakened portion connected to the side plate body.

[0011] In some embodiments, the thickness of the weakened portion is L1, and the thickness of the side plate body is L2, wherein 0.2≤L1 / L2≤0.8.

[0012] In some embodiments, the top plate is provided with a plurality of side plates on the same side surface perpendicular to the thickness direction of the top plate.

[0013] In some embodiments, the protective cover further includes a fastening member connected to the top plate, and the fastening member includes a snap-fit ​​section, and the snap-fit ​​section is used to snap-fit ​​with the mounting base.

[0014] In some embodiments, the fastening member and the side panel are arranged on the same side of the top plate along the thickness direction of the top plate, and the fastening member also includes an extension section, which extends along the thickness direction of the top plate, one end of the extension section is connected to the top plate, and the other end of the extension section is connected to the snap-fit ​​section, which extends in a thickness direction perpendicular to the top plate.

[0015] In some embodiments, the fastening member further includes a reinforcing rib, and the reinforcing rib is provided on a side of the extension section away from the locking section.

[0016] In some embodiments, the thickness of the engaging section gradually decreases in a direction away from the extension section; and / or the width of the extension section gradually decreases in a direction away from the top plate.

[0017] In some embodiments, there are a plurality of fastening members, and the plurality of fastening members are spaced apart along the circumference of the top plate.

[0018] A battery pack according to another embodiment of the present invention includes: a battery box provided with a mounting base; a battery module disposed in the battery box; and a protective cover, which is any one of the protective covers described in the embodiments of the present invention and is connected to the mounting base.

[0019] According to the battery pack embodiment of the present invention, since the weakened portion can be separated from at least one of the top panel body and the side panel body under the action of an external force, an operator can apply external force at the location of the weakened portion to disconnect the top panel body from the side panel body. When the protective cover of the battery pack embodiment of the present invention is compatible with mounting bases of different installation styles, the side panel body can be removed as needed, and of course, the side panel body can also be left intact as needed. Therefore, the protective cover embodiment of the present invention can be compatible with mounting bases of different installation styles, thereby improving the compatibility of the protective cover and reducing the number of materials used.

[0020] A vehicle according to another embodiment of the present invention includes the battery pack described in the embodiment of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is an axonometric view of the protective cover according to an embodiment of the present invention.

[0022] Figure 2 It is a front view of the protective cover of an embodiment of the present utility model.

[0023] Figure 3 It is a side view of the protective cover of the embodiment of the present utility model.

[0024] Figure 4 yes Figure 2 A magnified view of center.

[0025] Figure 5 yes Figure 3 Magnified view of B.

[0026] Figure 6 It is a top view of the protective cover of the embodiment of the utility model.

[0027] Figure 7 yes Figure 6 Cross-sectional view of the FF.

[0028] Figure 8 yes Figure 7 Enlarged view of C in the middle.

[0029] Figure 9 It is a schematic diagram of the connection between the protective cover and the mounting base in an embodiment of the present utility model.

[0030] Figure 10 It is an axonometric view of the protective cover (without the first side plate) of an embodiment of the present utility model.

[0031] Figure 11 It is an axonometric view of the protective cover (without the second side plate) of an embodiment of the present utility model.

[0032] Figure 12It is an axonometric view of the protective cover (excluding the third side plate) of an embodiment of the present utility model.

[0033] Figure 13 It is a partial diagram of the battery pack according to an embodiment of the present invention.

[0034] Reference numerals:

[0035] 100, top plate;

[0036] 102, fastening member; 1021, extension section; 10211, first abutting surface; 1022, engaging section; 10221, second abutting surface; 1023, reinforcing rib;

[0037] 200, side panel; 201, first side panel; 202, second side panel; 203, third side panel; 211, side panel body; 212, weakening portion; 2121, pressure relief hole;

[0038] 300, battery box; 301, mounting base;

[0039] 400. Copper busbar. DETAILED DESCRIPTION

[0040] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0041] Please refer to the following Figures 1 to 13 A protective cover, a battery pack, and a vehicle according to embodiments of the present invention are described.

[0042] like Figures 1 to 5 and Figure 9 As shown, the protective cover according to an embodiment of the present invention includes: a top plate 100 and at least one side plate 200, the side plate 200 is arranged on one side of the top plate 100 along a thickness direction orthogonal to the top plate 100, the side plate 200 includes a side plate body 211 and a weakened portion 212, one end of the weakened portion 212 is connected to the side plate body 211, and the other end of the weakened portion 212 is connected to the top plate 100, and the weakened portion 212 can be separated from at least one of the top plate 100 and the side plate body 211 under the action of external force.

[0043] According to the protective cover of the embodiment of the present invention, since the weakened portion 212 can be separated from at least one of the top plate 100 and the side plate body 211 under the action of an external force, the operator can apply an external force at the location of the weakened portion 212 to disconnect the top plate 100 from the side plate body 211. When the protective cover of the embodiment of the present invention is matched with the mounting base 301 of different installation forms, the side plate body 211 can be removed as needed, and of course, the side plate body 211 can also be left as needed. Therefore, the protective cover of the embodiment of the present invention can be matched with the mounting base 301 of different installation forms, thereby improving the compatibility of the protective cover and reducing the types of materials used.

[0044] It should be noted that the structural strength of the weakened portion 212 is weaker than that of the top plate 100 or the side plate body 211 , so that the weakened portion 212 can be easily separated from the top plate 100 or the side plate body 211 .

[0045] The phrase "the weakened portion 212 can be separated from at least one of the top panel 100 and the side panel body 211 under the action of an external force" can be understood as meaning that an operator can separate the side panel body 211 from the weakened portion 212 by breaking, pulling, or other means using an external force, or can separate the weakened portion 212 from the top panel 100 by breaking, pulling, or other means using an external force. Alternatively, an operator can separate the weakened portion 212 from both the top panel 100 and the side panel body 211 by breaking, pulling, or other means using an external force.

[0046] For example, the side panel body 211 and the top panel 100 are both flat panels, and the plane where the side panel body 211 is located can be substantially orthogonal to the plane where the top panel 100 is located.

[0047] When the protective cover is manufactured, the top plate 100 and the side plate 200 can be integrally molded. In other words, the protective cover can be molded by injection molding, that is, the side plate body 211, the weakened portion 212 and the side plate body 211 are an integrally molded part.

[0048] Alternatively, as Figure 3 As shown, the weakening portion 212 is provided with a plurality of relief holes 2121, which are spaced apart along the extension direction of the weakening portion 212. It is understood that the plurality of relief holes 2121 can reduce the structural strength of the weakening portion 212, so that the operator can easily separate the side panel body 211 from the top panel 100, which is conducive to improving the installation efficiency of the protective cover.

[0049] Here, the "extending direction of the weakened portion 212" refers to "a direction perpendicular to the thickness of the top plate 100." For example, when the length of the side plate 200 extends along the front-to-back direction of the top plate 100, the weakened portion 212 extends along the front-to-back direction of the top plate 100. For another example, when the length of the side plate 200 extends along the left-to-right direction of the top plate 100, the weakened portion 212 extends along the left-to-right direction of the top plate 100.

[0050] For example, Figure 3 As shown, the relief hole 2121 is a through-hole. For example, the relief hole 2121 can also be a blind hole. In the example of the present application, the relief hole 2121 is a square hollow hole. Compared with a circular relief hole 2121, the square relief hole 2121 is more likely to crack when the side panel body 211 is broken, thereby improving the separation efficiency of the side panel body 211 and saving time and effort.

[0051] Alternatively, as Figure 2 and Figure 4 As shown, the thickness of the weakened portion 212 at the end adjacent to the top panel 100 is less than the thickness of the weakened portion 212 at the end adjacent to the side panel body 211. Therefore, when the side panel 200 is separated, the end adjacent to the top panel 100 of the weakened portion 212 is severed before the end adjacent to the side panel body 211. That is, the side panel body 211 and the weakened portion 212 are separated from the top panel 100 simultaneously, thereby improving the smoothness of the outer periphery of the top panel 100 after separation.

[0052] For example, the weakened portion 212 may be tapered along a cross section perpendicular to its thickness, i.e., the weakened portion 212 may be thinner at the end adjacent to the top plate 100 and thicker at the end facing away from the top plate 100. This shape of the weakened portion 212 facilitates both injection molding and disassembly and breaking of the side panel 200, resulting in a better performance.

[0053] In other examples, the thickness of the weakened portion 212 adjacent to the side plate body 211 is smaller than the thickness of the weakened portion 212 adjacent to the top plate 100 , thereby facilitating separation of the side plate body 211 from the weakened portion 212 .

[0054] To further reduce the structural strength of the weakened portion 212, the thickness of the weakened portion 212 can be reduced. For example, the thickness of the weakened portion 212 is L1, and the thickness of the side panel body 211 is L2, where 0.2 ≤ L1 / L2 ≤ 0.8. In other words, the thickness of the weakened portion 212 is 20%-80% of the thickness of the side panel body 211.

[0055] For example, the ratio of L1 / L2 can be 0.2, 0.4, 0.6, or 0.8, thereby avoiding the problem of the side panel body 211 being disconnected from the top panel 100 during transportation or use, and making it easier for operators to separate the side panel body 211 from the top panel 100.

[0056] Optionally, there are a plurality of side panels 200 , and the plurality of side panels 200 are arranged around the circumference of the top panel 100 . At least one of the plurality of side panels 200 can be separated from the top panel 100 under the action of an external force.

[0057] It is understandable that if Figure 1 、 Figures 10 to 12 As shown, there can be one or more side panels 200. For example, there can be at least two side panels 200, with the two side panels 200 positioned on opposite sides of the top panel 100. Alternatively, the two side panels 200 can be arranged adjacent to each other along the circumference of the top panel 100. This allows operators to separate side panels 200 in different locations for different mounting bases 301, further expanding the compatibility of the protective cover.

[0058] Optionally, the top plate 100 may be provided with multiple side panels 200 on the same side surface perpendicular to the thickness direction of the top plate 100. For example, the orthographic projection of the top plate may be a quadrilateral. Multiple side panels 200 may be provided on a single side of the top plate 100 (i.e., the same side surface of the top plate 100 along the horizontal direction). This allows the operator to separate side panels 200 at different locations on the same side surface of the top plate 100 for different mounting bases 301, further expanding the compatibility of the protective cover.

[0059] In a specific example, if Figure 1 and Figure 2 As shown, the side plate 200 includes a first side plate 201, a second side plate 202 and a third side plate 203. The first side plate 201 and the second side plate 202 are arranged on opposite sides of the top plate 100 along the first direction, and the third side plate 203 is arranged on one side of the top plate 100 along the second direction. The first direction, the second direction and the thickness direction of the top plate 100 are orthogonal to each other. Figure 1 As shown, the first direction is the left-right direction of the top plate 100 , and the second direction is the front-back direction of the top plate 100 .

[0060] At least one of the first side panel 201, the second side panel 202 and the third side panel 203 can be separated from the top panel 100 under the action of an external force. Specifically, the shape of the top panel 100 is generally rectangular, the first side panel 201 is arranged on the left side of the top panel 100, the second side panel 202 is arranged on the right side of the top panel 100, and the third side panel 203 is arranged on the front side of the top panel 100. The protective cover of the embodiment of the present utility model can remove the first side panel 201, the second side panel 202 or the third side panel 203 in a targeted manner to meet the protection requirements of most battery packs. It should be noted that the side panel 200 is not provided at the rear position of the protective cover to avoid the copper busbar 400, that is, the copper busbar 400 can pass through the protective cover from the end where the side panel 200 is not provided to avoid interfering with the arrangement of the copper busbar 400.

[0061] In some embodiments, as Figures 4 to 8 As shown, the protective cover further includes a fastening member 102, which is connected to the top plate 100 and includes a snap-fit ​​section 1022, which is used to snap-fit ​​with the mounting base 301. When the protective cover is installed, the snap-fit ​​section 1022 of the fastening member 102 can snap-fit ​​with the corresponding mounting base 301 to secure the protective cover.

[0062] In the example of the present application, the fastening member 102 and the side plate 200 are arranged on the same side of the top plate 100 along the thickness direction of the top plate 100. The protective cover of the embodiment of the present invention can reduce the volume of the protective cover after assembly with the mounting base 301 by arranging the fastening member 102 and the side plate 200 on the same side of the top plate 100 along the thickness direction of the top plate 100, thereby making the installation structure of the protective cover more compact and occupying less space.

[0063] In other examples, the fastening member 102 and the side panel 200 may also be disposed on different sides of the top panel 100 in the thickness direction. For example, when the mating portion (not shown) of the mounting base 301 extends upward and protrudes from the top panel 100, the fastening member 102 may be disposed along the thickness direction of the top panel 100 on a side of the top panel 100 facing away from the side panel 200. In other words, the fastening member 102 and the side panel 200 are disposed on different sides of the top panel 100 in the thickness direction of the top panel 100.

[0064] For another example, the fastening member 102 is provided on one side of the top plate 100 along a direction perpendicular to the thickness of the top plate 100. It is understood that when the mating portion (not shown) of the mounting base 301 extends along a direction perpendicular to the thickness of the top plate 100, the fastening member 102 is provided on one side of the top plate 100 along a direction perpendicular to the thickness of the top plate 100 to align and engage with the mating portion of the mounting base 301.

[0065] It should be noted that the structure of the fastening member 102 and the arrangement position of the fastening member 102 can be designed according to the installation form of the installation base 301, and this application does not limit this.

[0066] Specifically, the fastening member 102 includes an extension section 1021 and a snap-fit ​​section 1022. The extension section 1021 extends along the thickness direction of the top plate 100. One end of the extension section 1021 is connected to the top plate 100, and the other end of the extension section 1021 is connected to the snap-fit ​​section 1022. The snap-fit ​​section 1022 extends perpendicular to the thickness direction of the top plate 100. It can be understood that the fastening member 102 snaps into contact with the mounting base 301 to secure the protective cover, thereby further improving the convenience of installing the protective cover.

[0067] Specifically, if Figure 4 As shown, a first abutting surface 10211 is provided on a side of the extension section 1021 adjacent to the mounting base 301, and a second abutting surface 10221 is provided on a side of the clamping section 1022 adjacent to the first abutting surface 10211. The angle between the first abutting surface 10211 and the second abutting surface 10221 is generally between 90° and 135°, thereby improving the firmness of the clamping between the fastener 102 and the mounting base 301.

[0068] Alternatively, as Figure 4 As shown, the fastening member 102 also includes a reinforcing rib 1023, which is located on the side of the extension section 1021 facing away from the engaging section 1022. It will be appreciated that the reinforcing rib 1023 can reinforce the structure of the extension section 1021, thereby reducing the probability of the extension section 1021 breaking during assembly and disassembly of the protective cover. Furthermore, the reinforcing rib 1023, located on the side of the extension section 1021 facing away from the engaging section 1022, can prevent interference with the engaging engagement of the fastening member 102.

[0069] For example, Figure 4 As shown, the thickness of the reinforcing rib 1023 gradually decreases in the direction away from the top plate 100, that is, the cross section of the reinforcing rib 1023 is substantially triangular, thereby improving the reinforcing effect of the reinforcing rib 1023 and reducing consumables.

[0070] Alternatively, as Figure 4 As shown, the thickness of the clamping section 1022 gradually decreases in the direction away from the extension section 1021. It is understandable that the thickness of the clamping section 1022 gradually becomes sharper in the direction away from the extension section 1021, thereby providing guidance when the clamping section 1022 is clamped, thereby improving the installation efficiency of the protective cover.

[0071] Alternatively, as Figure 5As shown, the width of the extension section 1021 gradually decreases in a direction away from the top plate 100. For example, the inclination angles of the two walls of the extension section 1021 along its width direction are between 1° and 5°. This can guide the extension section 1021 when it is inserted into the mounting base 301, further improving the installation efficiency of the protective cover.

[0072] In some embodiments, as Figure 1 and Figure 9 As shown, there are multiple fastening members 102, which are spaced apart along the circumference of the top plate 100. In the example of the present application, there are four fastening members 102, which are respectively located at the four corners of the top plate 100. The four fastening members 102 are simultaneously engaged with the mounting base 301, which can further enhance the secure installation of the protective cover. For example, the engaging sections 1022 of the four fastening members 102 extend horizontally away from the top plate 100 to adapt to the engaging slots of the mounting base 301.

[0073] like Figure 1 、 Figure 9 and Figure 13 As shown, a battery pack of another embodiment of the present invention includes a battery box 300, a battery module and a protective cover. The battery box 300 is provided with a mounting base 301, the battery module is arranged in the battery box 300, the protective cover is the protective cover of the present invention, and the fastener 102 is connected to the mounting base 301.

[0074] It should be noted that the size and shape of the mounting base can be designed according to actual protection needs. Figure 9 and Figure 13 As shown, the mounting base 301 is installed at the position of the exposed copper busbar 400 of the battery box 300 , and the protective cover is connected to the mounting base 301 to cover the end of the exposed copper busbar 400 .

[0075] like Figure 13 As shown, the battery box 300 is provided with a plurality of mounting bases 301 of different mounting forms, and there are multiple protective covers. The multiple protective covers can be specifically removed from the side panels 200 at different positions to engage with the mounting bases 301 of different mounting forms.

[0076] According to the battery pack of the embodiment of the present invention, when the protective cover is installed, the fastener 102 can be connected to the corresponding mounting base 301 to fix the protective cover. Since the weakened portion 212 can be separated from at least one of the top plate 100 and the side panel body 211 under the action of an external force, the operator can apply an external force at the position of the weakened portion 212 to disconnect the top plate 100 and the side panel body 211. When the protective cover of the battery pack of the embodiment of the present invention is matched with the mounting base 301 of different installation forms, the side panel body 211 can be removed as needed, and of course, the side panel body 211 can be selected not to be removed as needed. Therefore, the protective cover of the embodiment of the present invention can be matched with the mounting base 301 of different installation forms to improve the compatibility of the protective cover and reduce the types of materials used.

[0077] Another embodiment of the present invention is a vehicle comprising the battery pack of the present invention. The technical effects of the vehicle of the present invention are the same as those of the protective cover and battery pack of the present invention, and are not described in detail in this application.

[0078] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation to the present invention.

[0079] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this utility model, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0080] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0081] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0082] In the present invention, the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples without contradiction.

[0083] Although the above embodiments have been shown and described, it is understood that the above embodiments are illustrative and cannot be understood as limitations on the present invention. Changes, modifications, substitutions and variations of the above embodiments made by ordinary technicians in this field are all within the scope of protection of the present invention.

Claims

1. A protective cover, characterized in that: include: Top plate (100); At least one side panel (200), the side panel (200) being arranged on one side of the top panel (100) along a thickness direction orthogonal to the top panel (100), the side panel (200) comprising a side panel body (211) and a weakening portion (212), one end of the weakening portion (212) being connected to the side panel body (211), and the other end of the weakening portion (212) being connected to the top panel (100), and the weakening portion (212) being separable from at least one of the top panel (100) and the side panel body (211) under the action of an external force.

2. The protective cover according to claim 1, wherein: The weakening portion (212) is provided with a plurality of force relief holes (2121), and the plurality of force relief holes (2121) are arranged at intervals along the extension direction of the weakening portion (212).

3. The protective cover according to claim 1, wherein: The thickness of one end of the weakened portion (212) connected to the top plate (100) is smaller than the thickness of one end of the weakened portion (212) connected to the side plate body (211).

4. The protective cover according to claim 2, wherein: The thickness of the weakened portion (212) is L1, and the thickness of the side plate body (211) is L2, wherein 0.2≤L1 / L2≤0.

8.

5. The protective cover according to claim 1, wherein: The top plate (100) is provided with a plurality of side plates (200) on the same side surface perpendicular to the thickness direction of the top plate (100).

6. The protective cover according to claim 1, wherein: The protective cover further comprises a fastening member (102), the fastening member (102) being connected to the top plate (100), the fastening member (102) comprising a snap-fit ​​section (1022), and the snap-fit ​​section (1022) being used for snap-fitting with the mounting base (301).

7. The protective cover according to claim 6, wherein: The fastening member (102) and the side plate (200) are arranged on the same side of the top plate (100) along the thickness direction of the top plate (100); the fastening member (102) further includes an extension section (1021), the extension section (1021) extends along the thickness direction of the top plate (100), one end of the extension section (1021) is connected to the top plate (100), and the other end of the extension section (1021) is connected to the clamping section (1022).

8. The protective cover according to claim 7, wherein: The fastening member (102) further comprises a reinforcing rib (1023), wherein the reinforcing rib (1023) is provided on a side of the extension section (1021) facing away from the clamping section (1022).

9. The protective cover according to claim 7, wherein: The thickness of the engaging section (1022) gradually decreases in a direction away from the extending section (1021); And / or, the width of the extension section (1021) gradually decreases in a direction away from the top plate (100).

10. The protective cover according to claim 6, wherein: There are a plurality of fastening members (102), and the plurality of fastening members (102) are arranged at intervals along the circumference of the top plate (100).

11. A battery pack, characterized in that: include: A battery box (300), wherein a mounting base (301) is provided on the battery box (300); A battery module, the battery module being arranged in the battery box (300); A protective cover, wherein the protective cover is the protective cover according to any one of claims 1 to 10, and the protective cover is connected to the mounting base (301).

12. A vehicle, characterized in that: Including the battery pack according to claim 11.

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