Bottom protection plate and battery pack
By designing a polygonal crushable energy-absorbing unit and a reinforcing rib structure for the bottom protective plate, the structural deformation and leakage problems of the power battery pack under impact were solved, thus protecting the liquid cooling plate and the battery cells and improving safety.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-11
- Publication Date
- 2026-03-27
AI Technical Summary
Power battery packs are susceptible to damage from bottoming out, impacts from stones and sharp objects during vehicle operation, which can cause deformation of the bottom structure and leakage of battery cells, posing safety hazards.
A bottom protection plate is designed, including an upper plate, a middle plate, a lower plate, reinforcing ribs, and a polygonal crushing energy absorption unit. It absorbs impact energy through buffer cavities and crushing energy absorption structures, and the connection is enhanced by a third reinforcing rib to improve energy absorption efficiency.
It effectively absorbs impact energy, extends the energy absorption time, reduces the deformation of the upper plate, protects the liquid cooling plate and battery cells, and improves safety.
Smart Images
Figure CN224053299U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the technical field of battery pack, especially relate to a bottom guard plate and battery pack. BACKGROUND
[0002] With the new energy automobile market to power battery pack more and more high, battery pack rationalization, innovation design is especially important, and the bottom guard plate as the bottom protection component of power battery pack, its structure design also became one of the main concerns in the industry. When the automobile driving process, due to the bottom of the battery pack will be subjected to the impact of the stone and sharp object, the bottom of the battery pack is vulnerable to damage and cause the liquid cooling plate and the structure of the battery cell deformation and battery cell leakage, and further cause great security risks. SUMMARY
[0003] In view of the above problems, the utility model provides a bottom guard plate and battery pack.
[0004] The first purpose of the utility model is to provide a bottom guard plate, including upper plate, middle plate, lower plate, first reinforcing rib, second reinforcing rib and crush energy absorption unit;
[0005] The upper plate and the lower plate are connected by a plurality of first reinforcing ribs, and the upper plate, a plurality of first reinforcing ribs and the middle plate are connected to form a plurality of buffer cavities;
[0006] The crush energy absorption unit is a polygonal frame, two second reinforcing ribs are arranged on two vertices of the crush energy absorption unit respectively, and the middle plate and the lower plate are connected by a plurality of groups of second reinforcing ribs arranged on the two vertices of the crush energy absorption unit.
[0007] Further, the bottom guard plate further comprises a third reinforcing rib;
[0008] The third reinforcing rib is arranged between adjacent crush energy absorption units.
[0009] The connection position of the third reinforcing rib and the crush energy absorption unit is the vertex of the adjacent crush energy absorption unit.
[0010] Further, the crush energy absorption unit comprises a first crush energy absorption structure and / or a second crush energy absorption structure.
[0011] Further, the first crush energy absorption structure and the second crush energy absorption structure are both axisymmetric polygonal frames.
[0012] Further, the first crush energy absorption structure and the second crush energy absorption structure are both octagons.
[0013] Further, the first connection vertex of the first crush energy absorption structure is a vertex connected with the second reinforcing rib, and an included angle formed between the second reinforcing rib and one side of the first connection vertex is a first included angle;
[0014] The first crush energy absorption structure is provided with an outer convex angle at a vertex opposite to the first connection vertex;
[0015] The first connection vertex is located on the symmetry axis of the first crush energy absorption structure;
[0016] The first included angle is an acute angle, and the outer convex angle is an obtuse angle.
[0017] Further, the outer convex angle is greater than or equal to 90° and less than or equal to 130°.
[0018] Further, the second connection vertex of the second crush energy absorption structure is a vertex connected with the second reinforcing rib, and an included angle formed between the second reinforcing rib and one side of the second connection vertex is a second included angle;
[0019] The second crush energy absorption structure is provided with an inner concave angle at a vertex opposite to the second connection vertex;
[0020] The second connection vertex is located on the symmetry axis of the second crush energy absorption structure;
[0021] The second included angle is an acute angle, and the inner concave angle is an obtuse angle.
[0022] Further, the inner concave angle is greater than or equal to 90° and less than or equal to 130°.
[0023] The second object of the utility model provides a battery pack comprising the bottom guard plate.
[0024] The utility model discloses beneficial effects:
[0025] The bottom guard plate and the battery pack of the utility model are provided with the crush energy absorption unit polygonal frame, and a large amount of energy generated by the impact of the lower plate is absorbed; the buffer cavity is compressed in the process of absorbing the energy generated by the impact of the lower plate, thereby prolonging the energy absorption time, reducing the deformation of the upper plate, and achieving the purpose of protecting the liquid cooling plate and the battery cell.
[0026] The third reinforcing rib arranged between the crush energy absorption units strengthens the connection between the crush energy absorption units, strengthens the strength of the crush energy absorption units, and can also induce the outer convex angle or the inner concave angle to shrink faster, thereby improving the energy absorption efficiency of the crush energy absorption units.
[0027] The other features and advantages of the present application will be described in the following description and, in part, will become apparent to those skilled in the art upon examination of the following description or can be learned by practice of the present application. The objects and other advantages of the present application can be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings. BRIEF DESCRIPTION OF DRAWINGS
[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings described below are some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.
[0029] Figure 1 A structural schematic diagram of a bottom guard plate of a battery pack according to an embodiment of the present application is shown;
[0030] Figure 2 One of the cross-sectional schematic diagrams of the bottom guard plate according to an embodiment of the present application is shown;
[0031] Figure 3 One of the cross-sectional schematic diagrams of the bottom guard plate according to an embodiment of the present application is shown;
[0032] Figure 4 One of the cross-sectional schematic diagrams of the bottom guard plate according to an embodiment of the present application is shown;
[0033] In the drawings:
[0034] 100, upper plate; 200, middle plate; 300, buffer cavity; 400, first reinforcing rib; 500, second reinforcing rib; 600, crush energy-absorbing unit; 610, first crush energy-absorbing structure; 611, outer convex angle; 612, first connecting vertex; 620, second crush energy-absorbing structure; 621, inner concave angle; 622, second connecting vertex; 700, third reinforcing rib; 800, lower plate. DETAILED DESCRIPTION
[0035] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the following will combine the drawings in the embodiments of the present application to make a clear and complete description of the technical solutions in the embodiments of the present application. Obviously, the described embodiments are some embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the protection scope of the present application.
[0036] In the description of the utility model, it is understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inner", "periphery" and the like indicate the orientation or positional relationship, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the components or elements indicated must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model.
[0037] As shown in Figure 1 , a bottom guard plate according to an embodiment of the utility model, comprising an upper plate 100, a middle plate 200, a lower plate 800, a first reinforcing rib 400, a second reinforcing rib 500 and a crush energy absorption unit 600;
[0038] The upper plate 100 and the lower plate 800 are connected through a plurality of first reinforcing ribs 400, and the upper plate 100, the plurality of first reinforcing ribs 400 and the middle plate 200 are connected to form a plurality of buffer cavities 300 (see Figure 2 );
[0039] The crush energy absorption unit 600 is a polygonal frame, two second reinforcing ribs 500 are arranged on two vertices of the crush energy absorption unit 600 respectively, and the middle plate 200 and the lower plate 800 are connected through a plurality of groups of second reinforcing ribs 500 arranged on the two vertices of the crush energy absorption unit 600;
[0040] The polygonal setting of the crush energy absorption unit 600 utilizes the deformation advantage of the polygon (i.e. the energy is absorbed through the deformation of a plurality of bends on the polygon), absorbs the huge energy generated when the lower plate 800 is impacted, and reduces the impact of the impact energy on the upper plate 100;
[0041] The cooperation of the crush energy absorption unit 600 and the buffer cavity 300 can compress the buffer cavity 300 during the process of absorbing the energy generated when the lower plate 800 is impacted, thereby prolonging the energy absorption time and reducing the deformation amount of the upper plate 100 to achieve the purpose of protecting the liquid cooling plate and the battery cell.
[0042] In some embodiments of the utility model, the crush energy absorption unit 600 comprises a first crush energy absorption structure 610 and / or a second crush energy absorption structure 620, i.e.
[0043] The crush energy absorption unit 600 comprises a first crush energy absorption structure 610 (see Figure 2 );
[0044] Alternatively, the crush energy absorption unit 600 comprises a second crush energy absorption structure 620 (see Figure 3 );
[0045] Or, the crush energy absorption unit 600 comprises a first crush energy absorption structure 610 and a second crush energy absorption structure 620 (see Figure 4 ).
[0046] In some embodiments of the utility model, still include third reinforcing rib 700;
[0047] The third reinforcing rib 700 is arranged between adjacent crush energy absorption units 600, namely:
[0048] The third reinforcing rib 700 is arranged between adjacent first crush energy absorption structures 610;
[0049] Or, the third reinforcing rib 700 is arranged between adjacent second crush energy absorption structures 620;
[0050] Or, the third reinforcing rib 700 is arranged between adjacent first crush energy absorption structures 610 and second crush energy absorption structures 620 (see Figure 4 ) ;
[0051] The connecting position of the third reinforcing rib 700 and the crush energy absorption unit 600 is the vertex of the crush energy absorption unit 600, namely:
[0052] The connecting position of the third reinforcing rib 700 and the first crush energy absorption structure 610 is the vertex of the first crush energy absorption structure 610, and / or the connecting position of the third reinforcing rib 700 and the second crush energy absorption structure 620 is the vertex of the second crush energy absorption structure 620 (see Figure 4 ) ;
[0053] The arrangement of the third reinforcing rib 700 strengthens the connection between a plurality of crush energy absorption units 600, strengthens the strength of the crush energy absorption unit 600, and the arrangement of the third reinforcing rib 700 can also induce the contraction of the outer convex angle 611 or the inner concave angle 621 faster, thereby improving the energy absorption efficiency of the crush energy absorption unit 600.
[0054] In some embodiments of the utility model, the first crush energy absorption structure 610 and the second crush energy absorption structure 620 are both axisymmetric polygonal frames;
[0055] The axisymmetric arrangement of the first crush energy absorption structure 610 and the second crush energy absorption structure 620 is for the convenience of structure processing, and at the same time, when the first crush energy absorption structure 610 and the second crush energy absorption structure 620 of the polygon absorb impact energy, the impact energy can be uniformly distributed in the two parts of the polygon, so as to improve the stability of the first crush energy absorption structure 610 and the second crush energy absorption structure 620.
[0056] In some embodiments of the utility model, the first crush energy absorption structure 610 and the second crush energy absorption structure 620 are octagons.
[0057] The first crush energy absorption structure 610 and the second crush energy absorption structure 620 are octagons, and contain two axes of symmetry, forming up-down and left-right symmetry.
[0058] In some embodiments of the utility model, the vertex of the first crush energy absorption structure 610 connecting the second reinforcing rib 500 is a first connecting vertex 612, and the included angle formed by the second reinforcing rib 500 and one side of the first connecting vertex 612 is a first included angle.
[0059] The first crush energy absorption structure 610 forms an outer convex angle 611 at the vertex opposite the first connecting vertex 612.
[0060] The first connecting vertex 612 is located on the axis of symmetry of the first crush energy absorption structure 610.
[0061] The first included angle is an acute angle, and the outer convex angle 611 is an obtuse angle.
[0062] In some embodiments of the utility model, the outer convex angle 611 is greater than or equal to 90° and less than or equal to 130°.
[0063] In some embodiments of the utility model, the vertex of the second crush energy absorption structure 620 connecting the second reinforcing rib 500 is a second connecting vertex 622, and the included angle formed by the second reinforcing rib 500 and one side of the second connecting vertex 622 is a second included angle.
[0064] The second crush energy absorption structure 620 forms an inner concave angle 621 at the vertex opposite the second connecting vertex 622.
[0065] The second connecting vertex 622 is located on the axis of symmetry of the second crush energy absorption structure 620.
[0066] The second included angle is an acute angle, and the inner concave angle 621 is an obtuse angle.
[0067] In some embodiments of the utility model, the inner concave angle 621 is greater than or equal to 90° and less than or equal to 130°.
[0068] In some embodiments of the utility model, the vertex of the first crush energy absorption structure 610 connecting the third reinforcing rib 700 is opposite the first connecting vertex 612, that is, the vertex of the first crush energy absorption structure 610 connecting the third reinforcing rib 700 forms the vertex of the outer convex angle 611.
[0069] In some embodiments of the utility model, the vertex of the third reinforcing rib 700 is connected with the second connecting vertex 622 in the second crush energy absorption structure 620, that is, the vertex of the second crush energy absorption structure 620 is formed with the vertex of the concave angle 621.
[0070] In some embodiments of the utility model, a battery pack is provided, and the battery pack comprises the bottom guard plate in the above embodiments.
[0071] In the description of the present specification, the description of the terms "one embodiment", "example", "specific example" and the like means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are contained in at least one embodiment or example of the utility model. In the present specification, the illustrative description of the above terms does 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.
[0072] The basic principles, main features and advantages of the utility model are shown and described above. It should be understood by those skilled in the art that the utility model is not limited by the above embodiments, and the above embodiments and descriptions in the specification are only illustrative of the principles of the utility model. Without departing from the spirit and scope of the utility model, various changes and improvements can be made to the utility model, and these changes and improvements all fall within the scope of the utility model.
Claims
1. A bottom protective plate, characterized in that, It includes an upper plate (100), a middle plate (200), a lower plate (800), a first reinforcing rib (400), a second reinforcing rib (500), and a crushing energy absorption unit (600); The upper plate (100) and the lower plate (800) are connected by a number of first reinforcing ribs (400), and the upper plate (100), the number of first reinforcing ribs (400) and the middle plate (200) are connected to form a number of buffer cavities (300); The crushing energy absorption unit (600) is a polygonal frame, and two second reinforcing ribs (500) are respectively disposed at the two vertices of the crushing energy absorption unit (600). The middle plate (200) and the lower plate (800) are connected by several sets of second reinforcing ribs (500) disposed at the two vertices of the crushing energy absorption unit (600).
2. A bottom protective plate according to claim 1, characterized in that, It also includes a third reinforcing rib (700); The third reinforcing rib (700) is disposed between adjacent crushing energy-absorbing units (600); The connection position between the third reinforcing rib (700) and the crushing energy absorption unit (600) is at the apex of the crushing energy absorption unit (600).
3. A bottom protective plate according to claim 1, characterized in that... The crushing energy absorption unit (600) includes a first crushing energy absorption structure (610) and / or a second crushing energy absorption structure (620).
4. A bottom protective plate according to claim 3, characterized in that, Both the first crushing energy-absorbing structure (610) and the second crushing energy-absorbing structure (620) are axisymmetric polygonal frames.
5. A bottom protective plate according to claim 4, characterized in that, Both the first crushing energy absorption structure (610) and the second crushing energy absorption structure (620) are octagonal.
6. A bottom protective plate according to claim 5, characterized in that, In the first crushing energy absorption structure (610), the vertex connecting the second reinforcing rib (500) is the first connecting vertex (612), and the included angle formed by the second reinforcing rib (500) and one side of the first connecting vertex (612) is the first included angle; In the first crushing energy-absorbing structure (610), an outward convex angle (611) is formed at the vertex between the first connecting vertex (612); The first connection vertex (612) is located on the axis of symmetry of the first crushing energy absorption structure (610); The first included angle is an acute angle, and the convex angle (611) is an obtuse angle.
7. A bottom protective plate according to claim 6, characterized in that, The convex angle (611) is greater than or equal to 90° and less than or equal to 130°.
8. A bottom protective plate according to any one of claims 5-7, characterized in that, In the second crushing energy absorption structure (620), the vertex connecting the second reinforcing rib (500) is the second connecting vertex (622), and the included angle formed by the second reinforcing rib (500) and one side of the second connecting vertex (622) is the second included angle; In the second crushing energy-absorbing structure (620), a concave angle (621) is formed at the vertex between the second connecting vertex (622); The second connecting vertex (622) is located on the axis of symmetry of the second crushing energy-absorbing structure (620); The second included angle is an acute angle, and the concave angle (621) is an obtuse angle.
9. A bottom protective plate according to claim 8, characterized in that, The concave angle (621) is greater than or equal to 90° and less than or equal to 130°.
10. A battery pack, characterized in that, Includes the bottom protective plate as described in any one of claims 1-9.