Bottom protection plate assembly and battery pack with same

Abstract

The utility model discloses a bottom protection plate assembly and a battery pack with the bottom protection plate assembly. The bottom protection plate assembly comprises a plate main body, the at least one first reinforcing rib is arranged on one side, facing the battery monomer, of the plate main body; and the second reinforcing ribs are arranged on the periphery of the plate main body and are arranged at intervals in the circumferential direction of the plate main body. According to the bottom guard plate assembly, the first reinforcing rib and the second reinforcing rib are arranged, so that the overall rigidity of the bottom guard plate assembly can be improved, the bearing capacity, impact resistance and bending resistance of the bottom guard plate assembly can be improved, the deformation of the bottom guard plate assembly caused by external force is reduced, and the service life of the bottom guard plate assembly is prolonged. Therefore, the strength and the use safety of the overall structure of the battery pack can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a bottom guard plate assembly and a battery pack having the same. Background Art

[0002] With the rise of revolutionary changes in the contemporary automobile industry, pure electric vehicles as new energy vehicles are becoming more and more popular among all sectors of society. Among them, the battery life and safety of electric vehicles have become key constraints for new energy vehicles to gain market recognition and customer trust.

[0003] At present, most battery packs on the market are of regular size, small size, simple structure, and few are designed for high-energy compact battery packs. As people's demand for electric vehicle endurance increases, general car companies will adopt the method of arranging more batteries or increasing the size of battery packs under the same battery parameters to make electric vehicles have better endurance, but as a result, the overall structural strength of the battery pack is insufficient, and the safety problem has not been well solved. Utility Model Content

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes a bottom guard plate assembly, which can improve the strength and safety of the overall structure of the battery pack.

[0005] The utility model also provides a battery pack having the bottom guard plate assembly.

[0006] According to the first aspect of the utility model, the bottom guard plate assembly includes: a plate body; at least one first reinforcing rib, which is arranged on the side of the plate body facing the battery cell; and a plurality of second reinforcing ribs, which are arranged on the periphery of the plate body and are spaced apart along the circumference of the plate body.

[0007] According to the bottom guard plate assembly of the utility model, by providing the first reinforcing rib and the second reinforcing rib, the overall rigidity of the bottom guard plate assembly can be improved, thereby improving the bearing capacity, impact resistance and bending resistance of the bottom guard plate assembly, and reducing the deformation of the bottom guard plate assembly caused by external force, thereby improving the strength of the overall structure of the battery pack and the safety of use.

[0008] According to some embodiments of the utility model, the plate body includes: a plurality of mounting holes, the plurality of mounting holes are arranged on the periphery of the plate body and are spaced apart along the circumference of the plate body, the plurality of mounting holes are used to connect the plate body and the lower box body, the second reinforcing rib is stamped from a side of the plate body toward the battery cell and a side of the plate body away from the cell, and the second reinforcing rib is arranged between two adjacent mounting holes.

[0009] According to some embodiments of the present invention, the first reinforcing rib is formed by stamping from a side of the plate body facing away from the battery cell toward a side of the plate body facing the battery cell.

[0010] According to some embodiments of the present invention, the ratio of the width of the first reinforcing rib to the thickness of the battery cell is 2-3.5, and the ratio of the height of the first reinforcing rib to the thickness of the battery cell is 0.15-0.25.

[0011] According to some embodiments of the present invention, there are multiple first reinforcing ribs, and the multiple first reinforcing ribs are arranged at intervals along the length direction and / or width direction of the plate body.

[0012] According to some embodiments of the present invention, the first reinforcing ribs are formed into a rectangular structure, and some adjacent first reinforcing ribs are connected.

[0013] According to some embodiments of the utility model, the first reinforcing rib has a first convex rib and two second convex ribs, the first convex rib and the second convex rib are both formed into a square structure, the length of the first convex rib is greater than the length of the two second convex ribs, the two second convex ribs are arranged at intervals along the width direction of the plate body, and are arranged at intervals with the first convex rib in the length direction of the plate body.

[0014] According to some embodiments of the present invention, the first reinforcing ribs include: a plurality of first ribs, the plurality of first ribs extending along the length direction of the plate body and arranged at intervals along the width direction of the plate body; a plurality of second ribs, the plurality of second ribs extending along the width direction of the plate body and arranged at intervals along the length direction of the plate body, and the plurality of second ribs being connected to the plurality of first ribs.

[0015] According to some embodiments of the present invention, the first reinforcing rib further includes: a plurality of third ribs, the plurality of third ribs extending obliquely along the diagonal direction of the plate body, and being used to connect the adjacently arranged first ribs and the second ribs.

[0016] The battery pack according to the second aspect of the utility model comprises a lower box body, a plurality of battery cells and the bottom guard plate assembly according to the first aspect of the utility model.

[0017] According to the battery pack of the utility model, the overall performance of the battery pack is improved by providing the bottom guard plate assembly of the first aspect.

[0018] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic diagram of a battery pack according to an embodiment of the utility model;

[0020] Figure 2 is a schematic diagram of a bottom guard plate assembly according to an embodiment of the utility model;

[0021] Figure 3 yes Figure 2 An enlarged view of the circled A;

[0022] Figure 4 is a schematic diagram of a bottom guard plate assembly according to another embodiment of the utility model;

[0023] Figure 5 is a schematic diagram of a bottom guard plate assembly according to another embodiment of the utility model;

[0024] Figure 6 It is a schematic diagram of a bottom guard plate assembly according to another embodiment of the utility model.

[0025] Reference numerals:

[0026] 1000, battery pack;

[0027] 100, bottom guard plate assembly;

[0028] 10. Board body; 11. Mounting hole;

[0029] 20, first reinforcing rib; 21, first convex rib; 22, second convex rib; 23, first rib; 24, second rib; 25, third rib;

[0030] 30. Second reinforcement rib;

[0031] 200, liquid cooling plate; 300, buffer component; 400, battery cell; 500, upper cover; 600, lower box. DETAILED DESCRIPTION

[0032] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0033] Reference below Figure 2-Figure 6 The bottom guard plate assembly 100 according to the first embodiment of the utility model is described.

[0034] like Figure 2-Figure 6As shown, according to the bottom guard plate assembly 100 of the embodiment of the utility model, the plate body 10, at least one first reinforcing rib 20 and a plurality of second reinforcing ribs 30, the first reinforcing rib 20 is arranged on the side of the plate body 10 facing the battery cell 400; the plurality of second reinforcing ribs 30 are arranged on the periphery of the plate body 10 and are arranged at intervals along the circumference of the plate body 10.

[0035] Specifically, the plate body 10 is the basic structure of the entire bottom guard plate assembly 100, and mainly plays the role of bearing, protecting and connecting other components. It should be noted that the shape and size of the plate body 10 can be designed according to actual conditions, and the embodiments of the present application are all described by taking the plate body 10 as a rectangle as an example.

[0036] The number of the first reinforcing ribs 20 may be one or more, for example, one, two, three or more. The first reinforcing ribs 20 may increase the structural strength of the board body 10, thereby increasing the load-bearing capacity, impact resistance and bending resistance of the board body 10, thereby improving the overall structural strength and safety of the battery pack 1000.

[0037] There are multiple second reinforcing ribs 30, for example, there can be two, three or more, and the multiple second reinforcing ribs 30 are arranged uniformly or at specific regular intervals along the circumference of the plate body 10. In this way, the structural strength of the edge of the plate body 10 can be increased, and the deformation of the plate body 10 caused by external force can be effectively prevented, especially warping, twisting and the like, thereby improving the structural stability of the entire bottom guard plate assembly 100; at the same time, when the bottom guard plate assembly 100 needs to be connected to other equipment structures (such as a battery box, liquid cooling plate 200, etc.), the second reinforcing ribs 30 can also provide a stronger connection point, thereby ensuring the firmness and reliability of the connection at the connection point, thereby improving the safety of the battery pack 100.

[0038] According to the bottom guard plate assembly 100 of the embodiment of the utility model, by providing the first reinforcing rib 20 and the second reinforcing rib 30, the overall rigidity of the bottom guard plate assembly 100 can be improved, thereby improving the bearing capacity, impact resistance and bending resistance of the bottom guard plate assembly 100, and reducing the deformation of the bottom guard plate assembly 100 caused by external force, thereby improving the overall structural strength and safety of the battery pack 1000.

[0039] According to some embodiments of the present invention, Figure 3As shown, the plate body 10 includes: a plurality of mounting holes 11, the plurality of mounting holes 11 are arranged on the periphery of the plate body 10 and are arranged at intervals along the circumference of the plate body 10, the plurality of mounting holes 11 are used to connect the plate body 10 with the lower box 600, the second reinforcing rib 30 is stamped from the side of the plate body 10 facing the battery cell 400 to the side of the plate body 10 away from the cell, and the second reinforcing rib 30 is arranged between two adjacent mounting holes 11. Among them, the second reinforcing rib 30 is arranged between two adjacent mounting holes 11, which can improve the structural strength of the connection position between the plate body 10 and the lower box 600, and further improve the firmness and reliability of the connection between the bottom guard plate assembly 100 and the lower box 600; the second reinforcing rib 30 is stamped from the side of the plate body 10 facing the battery cell 400 to the side of the plate body 10 away from the cell, so that the second reinforcing rib 30 will not affect the flatness of the contact position between the plate body 10 and the lower box 600, and further ensure the sealing of the battery pack 1000.

[0040] Furthermore, the second reinforcing rib 30 is formed into a U-shaped structure, which is relatively simple and can reduce the difficulty of producing the bottom guard plate assembly 100 .

[0041] According to some embodiments of the present invention, Figure 2-Figure 6 As shown, the first reinforcing rib 20 is formed by stamping the side of the plate body 10 away from the battery cell 400 toward the side of the plate body 10 facing the battery cell 400. Among them, stamping is a forming method in which a press machine and a die apply external force to a plate, strip, tube, profile, etc. to cause plastic deformation or separation, thereby obtaining a workpiece (stamping part) of a desired shape and size. The process is relatively simple. Furthermore, the first reinforcing rib 20 is formed by stamping, which can simplify the production process and assembly links of the bottom guard plate assembly 100, thereby reducing the production cost of the bottom guard plate assembly 100 and improving the production rate of the bottom guard plate assembly 100; at the same time, it is not necessary to add other components, thereby reducing the overall weight of the bottom guard plate assembly 100, thereby reducing the weight of the battery pack 1000, and achieving lightweight battery pack 1000.

[0042] According to some embodiments of the present invention, the ratio of the width of the first reinforcing rib 20 to the thickness of the battery cell 400 is 2-3.5, and the ratio of the height of the first reinforcing rib 20 to the thickness of the battery cell 400 is 0.15-0.25. In this way, the first reinforcing rib 20 can provide sufficient support and pressure resistance without occupying too much space, thereby ensuring the energy density of the battery pack 1000.

[0043] For example, the ratio of the width of the first reinforcing rib 20 to the thickness of the battery cell 400 may be 2, 2.5, 3 or 3.5; the ratio of the height of the first reinforcing rib 20 to the thickness of the battery cell 400 may be 0.15, 0.2 or 0.25.

[0044] According to some embodiments of the present invention, Figure 2 As shown, the number of the first reinforcing ribs 20 is multiple, and the multiple first reinforcing ribs 20 are arranged along the length direction of the plate body 10 (for example Figure 2 front-to-rear direction as shown) and / or width direction (e.g. Figure 2 It is understandable that the plurality of first reinforcing ribs 20 may be arranged at intervals along the length direction of the board body 10, or may be arranged at intervals only along the width direction of the board body 10, or may be arranged at intervals along both the length direction of the board body 10 and the width direction of the board body 10. The plurality of first reinforcing ribs 20 may further enhance the structural strength of the board body 10, thereby enhancing the overall structural strength and safety of the battery pack 1000.

[0045] For example, the number of the first reinforcing ribs 20 may be two, three or more.

[0046] According to some embodiments of the present invention, Figure 2 As shown, the first reinforcing ribs 20 are formed into a rectangular structure, and some adjacent first reinforcing ribs 20 are connected. The rectangular structure is relatively simple, so the first reinforcing ribs 20 are formed into a rectangular structure, which can reduce the process difficulty of the bottom guard plate assembly 100 and improve the production rate of the bottom guard plate assembly 100; at the same time, the rectangular structure can also provide more balanced mechanical support, thereby further improving the stability of the battery pack 1000 assembly.

[0047] According to some embodiments of the present invention, Figure 4 As shown, the first reinforcing rib 20 has a first convex rib 21 and two second convex ribs 22, the first convex rib 21 and the second convex rib 22 are both formed into a square structure, the length of the first convex rib 21 is greater than the length of the two second convex ribs 22, the two second convex ribs 22 are arranged at intervals along the width direction of the plate body 10, and are arranged at intervals with the first convex rib 21 in the length direction of the plate body 10. In this way, while ensuring the overall strength of the bottom guard plate assembly 100, the number of the first reinforcing ribs 20 can be reduced, thereby reducing the process difficulty of the bottom guard plate assembly 100 and improving the production rate of the bottom guard plate assembly 100; at the same time, the square structure is relatively simple, thereby, the first convex rib 21 and the second convex rib 22 are both formed into a square structure, which can further reduce the process difficulty of the bottom guard plate assembly 100 and improve the production rate of the bottom guard plate assembly 100.

[0048] Furthermore, the first rib 21 can be formed as a cuboid, and the second rib 22 can be formed as a cube or a cuboid.

[0049] According to some embodiments of the present invention, as Figure 5 shown, the first reinforcing rib 20 includes: a plurality of first ribs 23 and a plurality of second ribs 24. The plurality of first ribs 23 extend along the length direction of the plate body 10 and are arranged at intervals along the width direction of the plate body 10; the plurality of second ribs 24 extend along the width direction of the plate body 10 and are arranged at intervals along the length direction of the plate body 10, and the plurality of second ribs 24 are connected to the plurality of first ribs 23. It can be understood that the plurality of second ribs 24 and the plurality of first ribs 23 are connected to each other to form a criss-cross grid-like or frame-like reinforcing structure. Among them, both the grid-like structure and the frame structure have high structural strength and bending resistance. Thus, by designing the first reinforcing rib 20 to include a plurality of connected first ribs 23 and a plurality of second ribs 24, the structural strength and bending resistance of the entire bottom guard plate assembly 100 can be increased, and further, the structural strength and bottom impact resistance of the entire battery pack 1000 can be improved.

[0050] For example, the number of the first ribs 23 and the second ribs 24 can be two, three or more.

[0051] Furthermore, for example Figure 5 shown, the number of the first ribs 23 is three, the number of the second ribs 24 is three, the first ribs 23 and the second ribs 24 are connected to form a "field" shape, and four grooves are defined. The battery pack 1000 further includes an elastic buffer member 300, and the elastic buffer member 300 is disposed in the grooves. In this way, while the bottom guard plate assembly 100 has high strength, it can also have the function of buffering and absorbing energy. Furthermore, when the battery pack 1000 is impacted from the bottom, the bottom guard plate assembly 100 in this embodiment can not only play a protective role, but also reduce the vibration force transmitted to the battery cell 400, and further, the damage probability of the battery cell 400 can be further reduced, thereby further improving the safety of the battery pack 1000.

[0052] According to some embodiments of the present invention, as Figure 6As shown, the first reinforcing rib 20 also includes: a plurality of third ribs 25, which extend obliquely along the diagonal direction of the plate body 10 and are used to connect the adjacently arranged first ribs 23 and second ribs 24. The plurality of third ribs 25 effectively connect the first ribs 23 and second ribs 24, which are originally perpendicular to each other on the two-dimensional plane, not only increasing the strength of the plate body 10 in the two main axis directions (length and width directions), but also significantly improving the ability of the plate body 10 to resist torsional deformation; at the same time, since the ribs in the diagonal direction can span and connect all corners of the plate body 10, the stress can be more evenly distributed throughout the plate body, thereby improving the overall stability and load-bearing performance of the bottom guard assembly 100.

[0053] For example Figure 6 As shown, the first reinforcing rib 20 is formed into a "M"-shaped structure, wherein the ribs in the "M"-shaped structure are staggered with each other, and the cross-arranged ribs greatly enhance the bending and torsional properties of the structure, thereby improving the overall stiffness of the plate body 10, so that it can still maintain good shape stability and load-bearing capacity when subjected to a variety of complex loads.

[0054] The battery pack 1000 according to the embodiment of the second aspect of the utility model includes a lower box 600, a plurality of battery cells 400 and the bottom guard plate assembly 100 according to the embodiment of the first aspect of the utility model.

[0055] Furthermore, if Figure 1 As shown, the battery pack 1000 also includes a liquid cooling plate 200, a buffer 300 and an upper cover 500. The buffer 300 is arranged between the liquid cooling plate 200 and the bottom guard plate assembly 100. Among them, the upper cover 500 is used to cover the open side of the lower box 600 to achieve the sealing of the battery pack 1000. The liquid cooling plate 200 is connected to the multiple battery cells 400 by bonding. The liquid cooling plate 200 is mainly used to support and cool the multiple battery cells 400 to ensure the safe operation of the battery pack 1000. The buffer 300 has a certain elastic energy absorption and buffering effect. In this way, when the battery is hit by the bottom, the buffer 300 can absorb the bottom impact energy, thereby reducing the vibration force transmitted to the battery cell 400, reducing the probability of damage to the battery cell 400, and thus improving the safety of the battery pack 1000.

[0056] Optionally, the buffer member 300 may be a solid structure or a honeycomb structure.

[0057] According to the battery pack 1000 of the embodiment of the utility model, the overall performance of the battery pack 1000 is improved by providing the bottom guard plate assembly 100 of the first embodiment.

[0058] 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 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 referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0059] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0060] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0061] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means 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 utility model. In this specification, the schematic representations of the above terms do 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. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0062] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A bottom guard plate assembly, characterized in that: include: Plate body; at least one first reinforcing rib, the first reinforcing rib being arranged on a side of the plate body facing the battery cell; A plurality of second reinforcing ribs are arranged at the periphery of the plate body and are spaced apart along the circumferential direction of the plate body.

2. The bottom guard plate assembly according to claim 1, characterized in that: The plate body comprises: a plurality of mounting holes, the plurality of mounting holes are arranged on the periphery of the plate body and are arranged at intervals along the circumference of the plate body, and the plurality of mounting holes are used to connect the plate body and the lower box body, The second reinforcing rib is formed by punching a side of the plate body facing the battery cell and a side of the plate body facing away from the cell, and the second reinforcing rib is arranged between two adjacent mounting holes.

3. The bottom guard plate assembly according to claim 1, characterized in that: The first reinforcing rib is formed by punching a side of the plate body away from the battery cell toward a side of the plate body facing the battery cell.

4. The bottom guard plate assembly according to claim 3, characterized in that: The ratio of the width of the first reinforcing rib to the thickness of the battery cell is 2-3.5, and the ratio of the height of the first reinforcing rib to the thickness of the battery cell is 0.15-0.

25.

5. The bottom guard plate assembly according to claim 3, characterized in that: There are multiple first reinforcing ribs, and the multiple first reinforcing ribs are arranged at intervals along the length direction and / or width direction of the plate body.

6. The bottom guard plate assembly according to claim 5, characterized in that: The first reinforcing ribs are formed into a rectangular structure, and some adjacent first reinforcing ribs are connected.

7. The bottom guard plate assembly according to claim 5, characterized in that: The first reinforcing rib has a first convex rib and two second convex ribs, the first convex rib and the second convex rib are both formed into a square structure, the length of the first convex rib is greater than the lengths of the two second convex ribs, the two second convex ribs are arranged at intervals along the width direction of the plate body, and are arranged at intervals with the first convex rib in the length direction of the plate body.

8. The bottom guard plate assembly according to claim 3, characterized in that: The first reinforcing rib comprises: A plurality of first ribs extending along the length direction of the plate body and arranged at intervals along the width direction of the plate body; A plurality of second ribs are provided, the plurality of second ribs extending along the width direction of the plate body and arranged at intervals along the length direction of the plate body, and the plurality of second ribs are connected to the plurality of first ribs.

9. The bottom guard plate assembly according to claim 8, characterized in that: The first reinforcing ribs further include: a plurality of third ribs, which extend obliquely along the diagonal direction of the plate body and are used to connect the first ribs and the second ribs that are adjacently arranged.

10. A battery pack, characterized in that: It comprises a lower box body, a plurality of battery cells and a bottom guard plate assembly according to any one of claims 1-9.

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