Battery pack protection plate assembly and battery pack

Abstract

The utility model belongs to the technical field of batteries, in particular relates to a battery pack guard plate assembly and a battery pack, and aims to solve the problem that the sealing performance of the battery pack is poor. The battery pack protection plate assembly comprises a first protection plate and a second protection plate which are oppositely arranged along a first direction, a side plate connected with the first protection plate and the second protection plate, and a reinforcing plate arranged between the first protection plate and the second protection plate. The reinforcing plate comprises at least two sections which are arranged in sequence, the normal direction of each section is crossed with the first direction, and each section in the reinforcing plate is inclined relative to the first protective plate and the second protective plate, so that the overall rigidity of the battery pack protective plate assembly is improved. In various bottom ball hitting working conditions of the second protection plate, through deformation and even breakage of the second protection plate and the reinforcing plate, the extrusion force transmitted to the first protection plate is reduced, the extrusion force transmission path is optimized, the stress of the first protection plate is reduced, and the first protection plate is prevented from being damaged or cracked, so that the overall sealing performance of the battery pack is ensured.

Description

Technical Field

[0001] The embodiments of the utility model relate to the field of battery technology, and in particular to a battery pack guard plate assembly and a battery pack. Background Art

[0002] With the rapid development of economy and science and technology, new energy vehicles are increasingly used because of their advantages such as energy saving, environmental protection, and low noise. Among them, the battery pack, as the most core power supply component of new energy vehicles, determines the key indicators of new energy vehicles such as driving range, cost, service life, and safety. The bottom protection of the battery pack is crucial to the safety of the battery pack, which is usually achieved through the battery pack guard plate assembly. The battery pack guard plate assembly can meet certain mechanical performance requirements, such as sealing and bearing part of the weight. However, the battery pack guard plate assembly is prone to insufficient rigidity and is difficult to meet the performance requirements of various bottom ball impacts. In particular, after the bottom ball impact test, the sealing of the battery pack is difficult to meet the performance requirements. Utility Model Content

[0003] In view of the above problems, an embodiment of the utility model provides a battery pack guard plate assembly and a battery pack to improve the overall sealing of the battery pack.

[0004] A first aspect of an embodiment of the utility model provides a battery pack guard plate assembly, comprising: a first guard plate and a second guard plate arranged opposite to each other along a first direction, a side plate connecting the first guard plate and the second guard plate, and a reinforcing plate arranged between the first guard plate and the second guard plate;

[0005] The reinforcing plate includes at least two segments arranged in sequence, and the normal direction of each segment intersects with the first direction.

[0006] In some possible examples, the first guard plate, the second guard plate, the side plate and the reinforcement plate are integrally extruded.

[0007] In some possible examples, the reinforcing plate is connected to the first guard plate or the second guard plate, and a rounded transition is formed between the reinforcing plate and the correspondingly connected first guard plate or the second guard plate.

[0008] In some possible examples, the at least two segments include at least one first plate segment and at least one second plate segment, the at least one first plate segment and the at least one second plate segment are alternately arranged in sequence, and the normal directions of the first plate segment and the second plate segment both intersect with the first direction.

[0009] In some possible examples, adjacent ends of the first plate segments and the second plate segments are connected to each other, so that the segments form an integral structure.

[0010] In some possible examples, an angle between mutually adjacent ends of adjacent first plate segments and second plate segments is an obtuse angle.

[0011] In some possible examples, the first guard plate includes a first portion directly opposite to the second guard plate, and a second portion located next to the first portion, and the second portion is configured to be fixedly connected to a side frame of the battery pack.

[0012] In some possible examples, there are a plurality of reinforcing plates, the plurality of reinforcing plates are spaced apart along a second direction, and a spacing between adjacent reinforcing plates is 30 mm-50 mm, and the second direction intersects the first direction.

[0013] In some possible examples, among the plurality of reinforcing plates, the number of the reinforcing plates connected to the first guard plate is greater than the number of the reinforcing plates connected to the second guard plate.

[0014] The battery pack guard plate assembly of the utility model embodiment has at least the following advantages:

[0015] The battery pack guard plate assembly in the embodiment of the utility model includes a first guard plate, a second guard plate, a side plate and a reinforcing plate. The first guard plate and the second guard plate are arranged opposite to each other along a first direction, and the side plate connects the first guard plate and the second guard plate. The reinforcing plate is arranged between the first guard plate and the second guard plate, and includes at least two segments arranged in sequence, and the normal direction of each segment intersects with the first direction. Each segment in the reinforcing plate is inclined relative to the first guard plate and the second guard plate to improve the overall stiffness of the battery pack guard plate assembly. In various bottom ball hitting conditions of the second guard plate, the second guard plate and the reinforcing plate are deformed or even broken, so that the extrusion force transmitted to the first guard plate is reduced, the extrusion force transmission path is optimized, the force on the first guard plate is reduced, and damage or cracks on the first guard plate are avoided, thereby ensuring the overall sealing of the battery pack.

[0016] The second aspect of the embodiment of the utility model further provides a battery pack, which includes a battery cell, a side frame for fixing the battery cell, and the battery pack shield assembly as described above, wherein the battery pack shield assembly is located at the bottom of the battery cell and is fixedly connected to the side frame. The battery pack has the above-mentioned battery pack shield assembly, and thus has at least the advantages of better ball impact resistance and better battery pack sealing. For details, please refer to the above and will not be repeated here.

[0017] In addition to the technical problems solved by the embodiments of the utility model described above, the technical features that constitute the technical solutions, and the beneficial effects brought about by the technical features of these technical solutions, other technical problems that can be solved by the battery pack guard plate assembly and the battery pack provided by the embodiments of the utility model, other technical features included in the technical solutions, and the beneficial effects brought about by these technical features will be further described in detail in the specific implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 An exploded view of a battery pack guard plate assembly in an embodiment of the present utility model;

[0020] Figure 2 It is an assembly diagram of the battery pack guard plate assembly in the embodiment of the utility model;

[0021] Figure 3 A schematic diagram of a reinforcement plate in an embodiment of the utility model;

[0022] Figure 4 Another schematic diagram of a reinforcing plate in an embodiment of the utility model;

[0023] Figure 5 This is another schematic diagram of a reinforcing plate in an embodiment of the utility model;

[0024] Figure 6 This is another schematic diagram of the reinforcing plate in the embodiment of the utility model.

[0025] Description of reference numerals:

[0026] 10- first guard plate;

[0027] 11-through hole;

[0028] 20- second guard plate;

[0029] 30-side panels;

[0030] 40- reinforcement plate;

[0031] 41- first plate segment;

[0032] 42-Second plate segment. DETAILED DESCRIPTION

[0033] The overall sealing of the battery pack in the related art is poor. The inventors have found that the reason is that the battery pack guard plate assembly is generally a single-layer or double-layer plate structure made of aluminum alloy, and is sealed with the battery pack box by welding, which has poor anti-ball impact performance. In addition, the battery pack guard plate assembly and the box can be regarded as an integrated structure, which is not conducive to platformization and is not conducive to reducing the cost of the battery pack.

[0034] An embodiment of the utility model provides a battery pack guard plate assembly, which includes a first guard plate, a second guard plate, a side plate and a reinforcing plate. The side plate connects the first guard plate and the second guard plate, and the reinforcing plate is disposed between the first guard plate and the second guard plate, and includes at least two segments arranged in sequence, and the normal direction of each segment intersects with the first direction. Each segment in the reinforcing plate is inclined relative to the first guard plate and the second guard plate to improve the overall rigidity of the battery pack guard plate assembly. In various bottom ball hitting conditions of the second guard plate, the second guard plate and the reinforcing plate are deformed or even broken, so that the extrusion force transmitted to the first guard plate is reduced, the extrusion force transmission path is optimized, the force on the first guard plate is reduced, and damage or cracks on the first guard plate are avoided, thereby ensuring the overall sealing of the battery pack.

[0035] In order to make the above-mentioned purposes, features and advantages of the embodiments of the utility model more obvious and easy to understand, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the utility model.

[0036] See also Figures 1 to 6 The embodiment of the utility model provides a battery pack shield assembly, which includes a first shield 10, a second shield 20, a side plate 30 and a reinforcing plate 40. The first shield 10 and the second shield 20 are arranged opposite to each other along a first direction, the side plate 30 connects the first shield 10 and the second shield 20, and the reinforcing plate 40 is arranged between the first shield 10 and the second shield 20 to absorb the energy transmitted to the first shield 10 after the second shield 20 hits the ball, so as to avoid failure of the first shield 10 and ensure the sealing of the entire battery pack.

[0037] The first direction is the spacing direction between the first guard plate 10 and the second guard plate 20. Figure 1 As shown, the first direction is the vertical direction (Z direction). The first guard plate 10 and the second guard plate 20 can be flat plates, so that the first guard plate 10 and the second guard plate 20 can be connected to the side frame of the battery pack and provide support for the battery cells of the battery pack. The first guard plate 10 and the second guard plate 20 can be arranged in parallel, and the first direction is perpendicular to the first guard plate 10 and perpendicular to the second guard plate 20.

[0038] like Figure 1As shown, the first guard plate 10 is located above the second guard plate 20, the first guard plate 10 is of equal thickness, the second guard plate 20 is of equal thickness, and the first direction is the thickness direction of the first guard plate 10 and the second guard plate 20. The thickness of the second guard plate 20 can be different from that of the first guard plate 10, and the thickness of the first guard plate 10 and the second guard plate 20 should not be too thick or too thin. According to the bottom ball hitting working condition of the battery pack, the thickness of the first guard plate 10 and the second guard plate 20 can be adjusted to meet the installation and performance requirements of different battery packs.

[0039] In some possible examples, the first guard plate 10 and the second guard plate 20 have different sizes, such as Figures 3 to 6 As shown, the first guard plate 10 includes a first portion and a second portion located beside the first portion. Figures 3 to 6 As shown at A in the figure, the first part is directly opposite to the second guard plate 20, that is, the positive projection of the second guard plate 20 on the first guard plate 10 coincides with the first part and does not coincide with the second part.

[0040] The second part may completely surround the first part, or half surround the first part, or the second part may be located on two opposite sides of the first part, with the other two ends of the second part aligned with the corresponding ends of the first part. Figures 3 to 6 As shown at B in the figure, there are two second parts, and the two second parts are respectively located on the left and right sides of the first part, the front end of the second part is aligned with the front end of the first part, and the rear end of the second part is aligned with the rear end of the first part.

[0041] The second part is configured to be fixedly connected to the side frame of the battery pack. In the example where the second part is located on two opposite sides of the first part, the width of each second part is 25mm-40mm, so as to facilitate the arrangement of the through hole 11, realize the fixed connection with the side frame, and ensure the reliability of the connection. The width direction is the arrangement direction of the second part, such as Figure 1 The length direction of the second part is the same as the length direction of the first part, and the length direction is perpendicular to the width direction and perpendicular to the first direction, such as Figure 1 The front-to-back direction (Y direction) is shown.

[0042] The second part can be connected to the side frame of the battery pack by bolts or rivets. For example, each second part is provided with a through hole 11, and the through hole 11 penetrates the surface of the corresponding second part opposite to the first direction. For example, the through hole 11 extends along the first direction. There are multiple through holes 11 on each second part. The multiple through holes 11 on the same second part are arranged at intervals along the width direction of the second part, and the spacing between two adjacent through holes 11 is 70mm-100mm, so as to avoid too small spacing, so as to achieve the cooperation between the through hole 11 and the bolt or rivet.

[0043] In some other possible examples, the first guard plate 10 and the second guard plate 20 have the same size, that is, the orthographic projection of the second guard plate 20 on the first guard plate 10 coincides with the first guard plate 10. The sizes of the first guard plate 10 and the second guard plate 20 are adapted to the sizes of the side frame of the battery pack, and the first guard plate 10 and / or the second guard plate 20 can be welded to the side frame, and the reliability of the welding is ensured.

[0044] Continue reading Figures 1 to 6 , the side plate 30 is a side plate 30 connecting the first guard plate 10 and the second guard plate 20, for example, the side plate 30 is welded to the first guard plate 10 and welded to the second guard plate 20. The side plate 30 may be a flat plate, one end of which is connected to the first guard plate 10, and the other end of which is connected to the second guard plate 20. For example, one of the two end surfaces of the side plate 30 opposite to each other along the first direction is connected to the surface of the first guard plate 10 facing the second guard plate 20, and the other end surface of the two end surfaces of the side plate 30 opposite to each other along the first direction is connected to the surface of the second guard plate 20 facing the first guard plate 10.

[0045] In some possible examples, there are two side panels 30, and two ends of each side panel 30 that are oppositely arranged along the first direction are respectively connected to the first guard plate 10 and the second guard plate 20. Figure 1 The end faces of the two side plates 30 facing away from each other are aligned with the end faces of the second guard plate 20. Figure 1 As shown, the end surfaces of the two side plates 30 facing away from each other are aligned with the left and right end surfaces of the second guard plate 20 respectively.

[0046] Along the extension direction of the side plate 30 ( Figure 1 The side panels 30 are aligned with the second guard plate 20 in the Y direction, that is, the side panels 30 can be the same length as the second guard plate 20. Figure 1 As shown, the front end face of each side plate 30 is aligned with the front end face of the second guard plate 20, and the rear end face of each side plate 30 is aligned with the rear end face of the second guard plate 20. The material of the side plate 30, the material of the first guard plate 10, and the material of the second guard plate 20 can be the same.

[0047] Continue reading Figures 1 to 6 The reinforcing plate 40 is disposed between the first guard plate 10 and the second guard plate 20 . The reinforcing plate 40 is also located between the two side plates 30 . The reinforcing plate 40 is connected to the first guard plate 10 and / or the second guard plate 20 .

[0048] In some possible examples, the first guard plate 10, the second guard plate 20, the side plate 30 and the reinforcing plate 40 are integrally extruded. By taking advantage of the mature extrusion process, the first guard plate 10, the second guard plate 20, the side plate 30 and the reinforcing plate 40 required by the design can be quickly obtained, and the production efficiency is high. In addition, the extrusion process is simple, can be integrally formed, and fewer molds are used.

[0049] Among them, the materials of the reinforcing plate 40, the side plate 30, the first guard plate 10 and the second guard plate 20 can be determined according to the bottom ball hitting working condition of the battery pack. Exemplarily, the materials of the reinforcing plate 40, the side plate 30, the first guard plate 10 and the second guard plate 20 are all aluminum or aluminum alloy for easy extrusion molding.

[0050] The reinforcing plate 40 includes at least two segments connected in sequence, and the normal direction of each segment intersects with the first direction. With such a configuration, each segment in the reinforcing plate 40 is inclined relative to the first guard plate 10 and the second guard plate 20 to improve the overall rigidity of the battery pack guard plate assembly. In various bottom ball hitting conditions of the second guard plate 20, the second guard plate 20 and the reinforcing plate 40 are deformed or even broken, thereby reducing the extrusion force transmitted to the first guard plate 10, optimizing the extrusion force transmission path, reducing the force on the first guard plate 10, and avoiding damage or cracks on the first guard plate 10, thereby ensuring the overall sealing of the battery pack.

[0051] The reinforcing plate 40 can be connected to the first guard plate 10 or the second guard plate 20, and the reinforcing plate 40 and the corresponding first guard plate 10 or the second guard plate 20 are rounded to meet the manufacturing process requirements. The arc of the rounded corner between the reinforcing plate 40 and the corresponding first guard plate 10 or the second guard plate 20 is as large as possible, for example, the arc segment is greater than or equal to 100°.

[0052] In some possible examples, at least two segments include at least one first plate segment 41 and at least one second plate segment 42, at least one first plate segment 41 and at least one second plate segment 42 are alternately arranged in sequence, and the normal directions of the first plate segment 41 and the second plate segment 42 are both intersecting with the first direction. The first plate segment 41 is inclined relative to the first guard plate 10 and inclined relative to the second guard plate 20, and the second plate segment 42 is inclined relative to the first guard plate 10 and inclined relative to the second guard plate 20.

[0053] Among them, the adjacent ends of the first plate segment 41 and the second plate segment 42 are connected to form an integrated structure, thereby improving the support effect of the reinforcing plate 40 and better absorbing the impact energy. The angle between the adjacent ends of the first plate segment 41 and the second plate segment 42 is an obtuse angle, and the first plate segment 41 can be a flat plate or an arc plate, and the second plate segment 42 can be a flat plate or an arc plate.

[0054] Based on the above examples, in some possible implementations, at least two segments include a first plate segment 41 and a second plate segment 42, such as Figure 3 As shown, one end of the first plate segment 41 is connected to one end of the second plate segment 42 so that the segments form an integral structure. Figure 4 As shown, one end of the first plate segment 41 and one end of the second plate segment 42 may also be in contact, or as shown in FIG. Figure 5As shown, one end of the first plate segment 41 and one end of the second plate segment 42 can also be adjacent. The reinforcing plate 40 is V-shaped or U-shaped, and the other end of the first plate segment 41 and the other end of the second plate segment 42 are both connected to the first plate segment 41 or are both connected to the second plate segment 42.

[0055] Based on the above examples, in some other possible implementations, at least two segments include a first plate segment 41 and two second plate segments 42, one end of the first plate segment 41 is connected to one end of one second plate segment 42, and the other end of the first plate segment 41 is connected to another second plate segment 42, so that the segment forms an integral structure. The adjacent ends of the adjacent first plate segment 41 and the second plate segment 42 may also be in contact or adjacent to each other. The other ends of the two second plate segments 42 are respectively connected to the first guard plate 10 and the second guard plate 20.

[0056] Based on the above examples, in some possible implementations, such as Figure 6 As shown, at least two segments include two first plate segments 41 and two second plate segments 42, and the two first plate segments 41 and the two second plate segments 42 are arranged alternately in sequence. The first plate segment 41 is connected to the end of the adjacent second plate segment 42, so that the segment forms an integral structure, and the adjacent ends of the adjacent first plate segment 41 and the second plate segment 42 can also be in contact or adjacent to each other. The reinforcing plate 40 is W-shaped, and the other end of the first plate segment 41 and the other end of the second plate segment 42 are both connected to the first plate segment 41, or are both connected to the second plate segment 42.

[0057] It can be understood that, in an example where the adjacent ends of the first plate segment 41 and the second plate segment 42 are in contact or adjacent to each other, one end of the first plate segment 41 can be connected to the first guard plate 10 or the second guard plate 20, or both ends of the first plate segment 41 are respectively connected to the first guard plate 10 and the second guard plate 20. One end of the second plate segment 42 can be connected to the first guard plate 10 or the second guard plate 20, or both ends of the second plate segment 42 are respectively connected to the first guard plate 10 and the second guard plate 20.

[0058] Continue reading Figures 1 to 6 A plurality of reinforcing plates 40 may be provided, and the plurality of reinforcing plates 40 are arranged at intervals along the second direction, and the second direction intersects the first direction. The plurality of reinforcing plates 40 are located between the two side plates 30, and the spacing between adjacent reinforcing plates 40 is 30 mm-50 mm to avoid the spacing between adjacent reinforcing plates 40 being too small or too large.

[0059] By increasing the number of reinforcing plates 40, more energy transferred from the second guard plate 20 to the first guard plate 10 after the ball is hit can be absorbed, thereby avoiding failure of the first guard plate 10 and ensuring the sealing of the entire battery pack. The size, thickness and number of reinforcing plates 40 can be adjusted to meet the installation requirements and performance requirements of different battery packs. Compared with a battery pack guard plate assembly without a reinforcing plate 40, a battery pack guard plate assembly with a reinforcing plate 40 can increase the overall mode of the battery pack by 1-3HZ, and can reduce the intrusion of the battery cell by 1-3mm during various bottom ball hitting conditions, thereby avoiding cracking and failure of the first guard plate 10.

[0060] In some possible examples, among the multiple reinforcing plates 40, the number of reinforcing plates 40 connected to the first guard plate 10 is greater than the number of reinforcing plates 40 connected to the second guard plate 20. By connecting more reinforcing plates 40 to the first guard plate 10, the reinforcing plates 40 provide more buffering effect for the first guard plate 10, so that the second guard plate 20 reduces the energy transmitted to the first guard plate 10 when the ball hits it.

[0061] It can be understood that part of the reinforcing plate 40 is connected to the first guard plate 10, and part of the reinforcing plate 40 is connected to the second guard plate 20. In the example where the first guard plate 10, the second guard plate 20, the side plate 30 and the reinforcing plate 40 are integrally extruded, part of the reinforcing plate 40 and the first guard plate 10 are an integral structure, part of the reinforcing plate 40 and the second guard plate 20 are an integral structure, and the first guard plate 10, the second guard plate 20 and the side plate 30 form an integral structure.

[0062] In some possible examples, when designing the battery pack shield assembly, the outer dimensions are drawn according to the size of the battery pack, and the first shield 10 and the second shield 20 are designed respectively, and the first shield 10 leaves a connection area with the side frame of the battery pack. Then, referring to the structure and process manufacturing feasibility of the reinforcing plate 40, the transition fillet between the reinforcing plate 40 and the first shield 10 / second shield 20 and the thickness of the reinforcing plate 40 are designed. The final design scheme is determined by analytical means and can be used as a platform design scheme.

[0063] In summary, the battery pack guard plate assembly in the embodiment of the utility model includes a first guard plate 10, a second guard plate 20, a side plate 30 and a reinforcing plate 40. The first guard plate 10 and the second guard plate 20 are arranged relative to each other along the first direction, and the side plate 30 connects the first guard plate 10 and the second guard plate 20. The reinforcing plate 40 is arranged between the first guard plate 10 and the second guard plate 20, and includes at least two segments arranged in sequence, and the normal direction of each segment intersects with the first direction. Each segment in the reinforcing plate 40 is inclined relative to the first guard plate 10 and the second guard plate 20 to improve the overall rigidity of the battery pack guard plate assembly. In various bottom ball hitting conditions of the second guard plate 20, the second guard plate 20 and the reinforcing plate 40 are deformed or even broken, so as to reduce the extrusion force transmitted to the first guard plate 10, optimize the extrusion force transmission path, reduce the force on the first guard plate 10, and avoid damage or cracks in the first guard plate 10, thereby ensuring the overall sealing of the battery pack.

[0064] The present utility model also provides a battery pack, which includes a battery cell, a side frame and a battery pack shield assembly. The side frame is arranged on the side of the battery cell and is used to fix the battery cell. The battery plate shield assembly is located at the bottom of the battery cell and is fixedly connected to the side frame. The battery pack has the above-mentioned battery pack shield assembly, so it has at least the advantages of better ball impact resistance and better battery pack sealing. Please refer to the above for details, which will not be repeated here.

[0065] The various embodiments or implementation methods in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments, and the same or similar parts between the various embodiments can be referenced to each other.

[0066] Those skilled in the art should understand that, in the disclosure of the present invention, the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred system or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the above terms should not be understood as limiting the present invention.

[0067] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiments or examples are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0068] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A battery pack guard plate assembly, characterized in that: include: A first guard plate and a second guard plate arranged opposite to each other in a first direction, a side plate connecting the first guard plate and the second guard plate, and a reinforcing plate arranged between the first guard plate and the second guard plate; The reinforcing plate includes at least two segments arranged in sequence, and the normal direction of each segment intersects with the first direction.

2. The battery pack guard plate assembly according to claim 1, characterized in that: The first guard plate, the second guard plate, the side plate and the reinforcing plate are integrally extruded.

3. The battery pack guard plate assembly according to claim 1, characterized in that: The reinforcing plate is connected to the first guard plate or the second guard plate, and a rounded transition is formed between the reinforcing plate and the correspondingly connected first guard plate or the second guard plate.

4. The battery pack guard plate assembly according to claim 1, characterized in that: The at least two segments include at least one first plate segment and at least one second plate segment, the at least one first plate segment and the at least one second plate segment are alternately arranged in sequence, and the normal directions of the first plate segment and the second plate segment both intersect with the first direction.

5. The battery pack guard plate assembly according to claim 4, characterized in that: The adjacent ends of the first plate segments and the second plate segments are connected to each other, so that the segments form an integral structure.

6. The battery pack guard plate assembly according to claim 4, characterized in that: The angle between the ends of the adjacent first plate segments and the second plate segments that are adjacent to each other is an obtuse angle.

7. The battery pack shield assembly according to any one of claims 1 to 6, characterized in that: The first guard plate includes a first portion directly opposite to the second guard plate, and a second portion located beside the first portion, and the second portion is configured to be fixedly connected to the side frame of the battery pack.

8. The battery pack shield assembly according to any one of claims 1 to 5, characterized in that: There are a plurality of reinforcing plates, and the plurality of reinforcing plates are arranged at intervals along a second direction, and a spacing between adjacent reinforcing plates is 30 mm-50 mm, and the second direction intersects with the first direction.

9. The battery pack guard plate assembly according to claim 6, characterized in that: Among the plurality of reinforcing plates, the number of the reinforcing plates connected to the first guard plate is greater than the number of the reinforcing plates connected to the second guard plate.

10. A battery pack, characterized in that: It comprises a battery cell, a side frame for fixing the battery cell, and a battery pack protective plate assembly as described in any one of claims 1 to 9, wherein the battery pack protective plate assembly is located at the bottom of the battery cell and is fixedly connected to the side frame.

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