Cover plate and battery pack

Abstract

The utility model discloses a cover plate and a battery pack, the cover body comprises: a cover body, the cover body is provided with a plurality of first reinforcing ribs and a plurality of second reinforcing ribs, the plurality of first reinforcing ribs extend along a first direction, the plurality of first reinforcing ribs are spaced along a second direction, the plurality of second reinforcing ribs extend along the second direction, and the plurality of second reinforcing ribs are spaced along the second direction. The second reinforcing ribs are spaced in the first direction, and the first direction is perpendicular to the second direction. According to the cover plate, the first reinforcing ribs and the second reinforcing ribs are arranged on the cover body, the multiple first reinforcing ribs extend in the first direction, the multiple first reinforcing ribs are spaced in the second direction, the multiple second reinforcing ribs extend in the second direction, and the multiple second reinforcing ribs are spaced in the first direction. The first direction is perpendicular to the second direction, so that the overall strength and rigidity of the cover plate are effectively enhanced, and the deformation of the cover plate under the action of external force is reduced, so that the battery pack applying the cover plate meets the performance requirements of working conditions such as impact, bottom ball strike, thermal runaway and abnormal sound.

Description

Technical Field

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

[0002] With the rapid development and iteration of the electric vehicle industry, the cost of battery packs has become particularly prominent. At the same time, since electric vehicles will encounter various complex working conditions during driving, in order to improve the battery pack’s ability to cope with various working conditions, the structural strength of the battery pack must be improved. The design of the cover structure directly affects the overall safety performance of the battery pack. Utility Model Content

[0003] 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 cover plate, which effectively enhances the overall strength and rigidity and reduces the deformation of the cover plate under the action of external force, so that the battery pack using the cover plate meets the performance requirements of working conditions such as impact, bottom ball hit, thermal runaway and abnormal noise.

[0004] The utility model also provides a battery pack, which includes the above-mentioned cover plate.

[0005] The cover plate according to the embodiment of the utility model is used for a battery pack and includes: a cover body, on which a first reinforcing rib and a second reinforcing rib are provided, wherein the first reinforcing rib extends in a first direction and is in plurality, and the plurality of the first reinforcing ribs are spaced apart along a second direction, the second reinforcing rib extends in plurality in the second direction, and the plurality of the second reinforcing ribs are spaced apart along the first direction, and the first direction and the second direction are perpendicular.

[0006] According to the cover plate of the embodiment of the utility model, a first reinforcing rib and a second reinforcing rib are provided on the cover body, the first reinforcing rib extends along the first direction and is in plurality, the plurality of first reinforcing ribs are spaced apart along the second direction, the second reinforcing rib extends along the second direction and is in plurality, the plurality of second reinforcing ribs are spaced apart along the first direction, and the first direction and the second direction are perpendicular, thereby effectively enhancing the overall strength and rigidity of the cover plate and reducing the deformation of the cover plate under the action of external force, so that the battery pack using the cover plate meets the performance requirements of working conditions such as impact, bottom ball hit, thermal runaway and abnormal noise.

[0007] In some embodiments of the present invention, the first reinforcing rib is concave downward or convex upward; and / or the second reinforcing rib is concave downward or convex upward.

[0008] In some embodiments of the present invention, one end of the first reinforcing rib extends along the first direction to the outer peripheral wall of the cover body, and the other end is spaced apart from the outer peripheral wall of the cover body; and / or one end of the second reinforcing rib extends along the second direction to the outer peripheral wall of the cover body, and the other end is spaced apart from the outer peripheral wall of the cover body.

[0009] In some embodiments of the present invention, both ends of the first reinforcing rib along the first direction are spaced apart from the outer peripheral wall of the cover body; and / or both ends of the second reinforcing rib along the first direction are spaced apart from the outer peripheral wall of the cover body.

[0010] In some embodiments of the present invention, the plurality of first reinforcing ribs are formed into two groups, the two groups of first reinforcing ribs are spaced apart along the first direction, and along the first direction, the plurality of second reinforcing ribs are located between the two groups of first reinforcing ribs.

[0011] In some embodiments of the present invention, two ends of part of the second reinforcing ribs along the first direction are separated from two groups of the first reinforcing ribs; and / or two ends of part of the second reinforcing ribs along the first direction are connected to two groups of the first reinforcing ribs.

[0012] In some embodiments of the utility model, there are two first reinforcing ribs, there are two second reinforcing ribs, the two first reinforcing ribs and the two second reinforcing ribs are connected end to end to form an annular structure, and a plurality of third reinforcing ribs are further provided on the cover body, the plurality of third reinforcing ribs are all located in the annular structure and are radially spaced around the midpoint of the annular structure.

[0013] In some embodiments of the utility model, a connecting block is further provided on the cover body, and the connecting block is located at the midpoint of the annular structure. One end of the plurality of third reinforcing ribs in the length direction is connected to the connecting block, and the other end is connected to the annular structure.

[0014] A battery pack according to an embodiment of the present invention includes the above-mentioned cover plate.

[0015] According to the battery pack of the embodiment of the utility model, a cover plate is provided, and a first reinforcing rib and a second reinforcing rib are provided on the cover body, the first reinforcing rib extends along the first direction and is in plurality, and the plurality of first reinforcing ribs are spaced apart along the second direction, the second reinforcing rib extends along the second direction and is in plurality, and the plurality of second reinforcing ribs are spaced apart along the first direction, and the first direction and the second direction are perpendicular, thereby effectively enhancing the overall strength and rigidity of the cover plate and reducing deformation of the cover plate under external force, so as to meet performance requirements of working conditions such as impact, bottom ball hit, thermal runaway and abnormal noise of the battery pack.

[0016] In some embodiments of the utility model, it also includes: a box body, the cover plate is located above the box body and connected to the box body, and the cover plate and the box body define a accommodating cavity; a module assembly, the module assembly is located in the accommodating cavity; a pressure plate, the pressure plate is located in the accommodating cavity and above the module assembly, and the pressure plate is connected to the module assembly; a first buffer component, the first buffer component is located in the accommodating cavity and above the pressure plate, and the first buffer component is connected to the cover plate.

[0017] 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

[0018] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

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

[0020] Figure 2 is an exploded view of a partial structure of a battery pack according to an embodiment of the utility model, wherein a cover plate, a box body, a second buffer member and a third buffer member are shown;

[0021] Figure 3 is a structural diagram of a cover plate according to another embodiment of the utility model;

[0022] Figure 4 is a structural diagram of a cover plate according to another embodiment of the utility model;

[0023] Figure 5 is a structural diagram of a cover plate according to another embodiment of the utility model;

[0024] Figure 6 It is a structural diagram of a cover plate according to another embodiment of the utility model.

[0025] Reference numerals:

[0026] 100. Battery pack;

[0027] 1. Cover plate; 11. Cover body; 12. First reinforcing rib; 13. Second reinforcing rib; 14. Third reinforcing rib; 15. Connecting block;

[0028] 2. Box body; 21. Accommodating chamber; 211. First sub-chamber; 212. Second sub-chamber; 22. Crossbeam;

[0029] 3. Module assembly;

[0030] 4. Press plate;

[0031] 5. A first buffer member;

[0032] 6. A second buffer;

[0033] 7. The third buffer;

[0034] 8. Liquid cooling plate;

[0035] 9. Fourth buffer member;

[0036] 10. Bottom guard plate. DETAILED DESCRIPTION

[0037] 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 only used to explain the present invention, and cannot be understood as limiting the present invention.

[0038] In the description of the present utility model, it is necessary to understand 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 positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0039] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" 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 or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0040] The cover plate 1 according to an embodiment of the present invention will be described below with reference to the accompanying drawings.

[0041] like Figure 1-Figure 5As shown, the cover plate 1 according to the embodiment of the utility model is used for the battery pack 100, and the cover plate 1 includes a cover body 11. The cover body 11 is provided with a first reinforcing rib 12 and a second reinforcing rib 13, and the first reinforcing rib 12 is arranged along a first direction (for example Figure 1-Figure 5 The plurality of first reinforcing ribs 12 extend in a second direction (eg, Figure 1-Figure 5 The second reinforcing ribs 13 are spaced apart along the second direction (as shown in FIG. 1 ), the second reinforcing ribs 13 extend in a plurality along the second direction, and the plurality of second reinforcing ribs 13 are spaced apart along the first direction, and the first direction and the second direction are perpendicular to each other.

[0042] Thus, by extending a plurality of first reinforcing ribs 12 along the first direction, the structural strength of the cover plate 1 in the first direction is effectively enhanced, and by spacing a plurality of first reinforcing ribs 12 along the second direction, the impact force can be dispersed to a certain extent and the local stress concentration can be reduced. At the same time, by extending a plurality of second reinforcing ribs 13 along the second direction, the structural strength of the cover plate 1 in the second direction is effectively enhanced, and by spacing a plurality of second reinforcing ribs 13 along the first direction, the impact force can be dispersed to a certain extent and the local stress concentration can be reduced. Thus, by means of a plurality of first reinforcing ribs 12 and a plurality of second reinforcing ribs 13, the overall strength and rigidity of the cover plate 1 are effectively enhanced, and the deformation of the cover plate 1 under the action of external force is reduced, so that the battery pack 100 using the cover plate 1 meets the performance requirements of working conditions such as impact, bottom ball hit, thermal runaway and abnormal noise.

[0043] For example, the first direction is the front-to-back direction of the vehicle, and the second direction is the left-to-right direction of the vehicle. When the battery pack 100 using the cover plate 1 is applied to the vehicle, the structural strength of the cover plate 1 in the front-to-back direction is effectively enhanced by the multiple first reinforcing ribs 12, and the structural strength of the cover plate 1 in the left-to-right direction is effectively enhanced by the multiple second reinforcing ribs 13, thereby enhancing the structural strength of the cover plate 1 in the front-to-back direction and the left-rear direction, thereby ensuring the overall structural strength of the cover plate 1. Specifically, when the vehicle encounters uneven roads, bumps, collisions, etc., the cover plate 1 has high strength and rigidity, which can effectively disperse and resist these impact forces, thereby reducing the vibration and impact inside the battery pack 100, thereby protecting the integrity of the battery pack 100 and improving reliability.

[0044] Furthermore, the module assembly 3 includes a plurality of battery cells, the thickness of the battery cells is a, the width of the first reinforcing rib 12 is b, the width of the second reinforcing rib 13 is c, the height of the first reinforcing rib 12 along the vertical direction is d, and the height of the second reinforcing rib 13 along the vertical direction is e, wherein the vertical direction, the first direction and the second direction are perpendicular to each other, b = 6a-8.5a, c = 6a-8.5a, d = 0.2a-0.35a, d = 0.2a-0.35a, e = 0.2a-0.35a. Thus, the reliability and practicality of the first reinforcing rib 12 and the second reinforcing rib 13 are further improved by such an arrangement.

[0045] Optionally, the shapes of the first reinforcing rib 12 and the second reinforcing rib 13 may be a square shape, a rectangle, an S shape or the like, which is not limited here.

[0046] It should be noted that in the embodiment of the present utility model, the number of the first reinforcing ribs 12 can be flexibly set according to the actual situation, for example, the first reinforcing ribs 12 are two, three, four, five, six or more, which are all within the protection scope of the present utility model. At the same time, the number of the second reinforcing ribs 13 can be flexibly set according to the actual situation, for example, the second reinforcing ribs 13 are two, three, four, five, six or more, which are all within the protection scope of the present utility model.

[0047] It should be noted that, under certain conditions, the cover plate 1 of the present application has relatively strong structural strength and rigidity, and the battery pack 100 using the cover plate 1 can omit the cross beam 22 or the longitudinal beam to meet the form of different battery packs 100 and reduce weight and cost.

[0048] According to the cover plate 1 of the embodiment of the utility model, a first reinforcing rib 12 and a second reinforcing rib 13 are provided on the cover body 11, the first reinforcing rib 12 extends along the first direction and is in plurality, the plurality of first reinforcing ribs 12 are spaced apart along the second direction, the second reinforcing rib 13 extends along the second direction and is in plurality, the plurality of second reinforcing ribs 13 are spaced apart along the first direction, and the first direction and the second direction are perpendicular, thereby effectively enhancing the overall strength and rigidity of the cover plate 1 and reducing the deformation of the cover plate 1 under the action of external force, so that the battery pack 100 using the cover plate 1 meets the performance requirements of working conditions such as impact, bottom ball hit, thermal runaway and abnormal noise.

[0049] In some embodiments of the present invention, Figure 1-Figure 5 As shown, the first reinforcing rib 12 is concave downward or convex upward. It is understandable that when the battery pack 100 is subjected to external impact, the first reinforcing rib 12 is set to be concave downward to effectively absorb part of the impact force, thereby reducing the stress concentration of the cover plate 1, thereby protecting the internal structure of the battery pack 100 and reducing the weight of the cover plate 1. Alternatively, the first reinforcing rib 12 is set to convex upward to further improve the rigidity and strength of the cover plate 1, and the convex part can increase the contact area with the air, which is beneficial to the heat dissipation of the battery pack 100.

[0050] In some embodiments of the present invention, Figure 1-Figure 5As shown, the second reinforcing rib 13 is concave downward or convex upward. It is understandable that when the battery pack 100 is subjected to external impact, the second reinforcing rib 13 is set to be concave downward to effectively absorb part of the impact force, thereby reducing the stress concentration of the cover plate 1, thereby protecting the internal structure of the battery pack 100 and reducing the weight of the cover plate 1. Alternatively, the second reinforcing rib 13 is set to convex upward to further improve the rigidity and strength of the cover plate 1, and the convex part can increase the contact area with the air, which is beneficial to the heat dissipation of the battery pack 100.

[0051] In some embodiments of the present invention, Figure 1-Figure 3 As shown, one end of the first reinforcing rib 12 along the first direction extends to the outer peripheral wall of the cover body 11, and the other end is spaced from the outer peripheral wall of the cover body 11. Thus, through such an arrangement, the first reinforcing rib 12 forms a "cantilever" structure, which can increase the torsion resistance of the cover body 11 and improve its stability under complex stress environments. At the same time, the arrangement of the first reinforcing rib 12 extending along the first direction to the outer peripheral wall of the cover body 11 helps to disperse the external impact force to the entire cover body 11, prevent structural damage caused by excessive force at a single point, and further improve reliability.

[0052] Furthermore, the first reinforcing rib 12 is recessed downward, and the distance that the portion of the first reinforcing rib 12 extending to the cover body 11 is recessed downward is smaller than the distance that the portion spaced between the first reinforcing rib 12 and the cover body 11 is recessed downward. Thus, the portion of the first reinforcing rib 12 extending to the cover body 11 is reinforced through the arrangement, thereby further improving reliability.

[0053] In some embodiments of the present invention, Figure 3 As shown, one end of the second reinforcing rib 13 along the second direction extends to the outer peripheral wall of the cover body 11, and the other end is spaced from the outer peripheral wall of the cover body 11. Thus, through such an arrangement, the second reinforcing rib 13 forms a "cantilever" structure, which can increase the torsion resistance of the cover body 11 and improve its stability under complex stress environments. At the same time, the arrangement of the second reinforcing rib 13 extending from one end along the first direction to the outer peripheral wall of the cover body 11 helps to disperse the external impact force to the entire cover body 11, prevent structural damage caused by excessive force at a single point, and further improve reliability.

[0054] Furthermore, the second reinforcing rib 13 is recessed downward, and the distance that the portion of the second reinforcing rib 13 extending to the cover body 11 is recessed downward is smaller than the distance that the portion spaced apart from the cover body 11 is recessed downward. Thus, the portion of the second reinforcing rib 13 extending to the cover body 11 is reinforced through this arrangement, thereby further improving reliability.

[0055] In some embodiments of the present invention, both ends of the first reinforcing rib 12 along the first direction are spaced apart from the outer peripheral wall of the cover body 11. Thus, the risk of failure caused by stress concentration on the outer peripheral wall of the cover body 11 is avoided by such an arrangement, so that the structural rigidity of the entire cover plate 1 is better.

[0056] In some embodiments of the present invention, Figure 4 As shown, one end of a portion of the first reinforcing ribs 12 along the first direction extends to the outer peripheral wall of the cover body 11, and the other end is spaced apart from the outer peripheral wall of the cover body 11, and both ends of the remaining portion of the first reinforcing ribs 12 along the first direction are spaced apart from the outer peripheral wall of the cover body 11, so that the cover plate 1 meets different structural requirements.

[0057] In some embodiments of the present invention, Figure 4 As shown, both ends of the second reinforcing rib 13 along the first direction are spaced apart from the outer peripheral wall of the cover body 11. Thus, the risk of failure caused by stress concentration on the outer peripheral wall of the cover body 11 is avoided by such an arrangement, so that the structural rigidity of the entire cover plate 1 is better.

[0058] In some embodiments of the present invention, Figure 1 and Figure 2 As shown, one end of a portion of the second reinforcing ribs 13 along the second direction extends to the outer peripheral wall of the cover body 11, and the other end is spaced apart from the outer peripheral wall of the cover body 11, and both ends of the remaining portion of the second reinforcing ribs 13 along the second direction are spaced apart from the outer peripheral wall of the cover body 11, so that the cover plate 1 meets different structural requirements.

[0059] In some embodiments of the present invention, Figure 1-Figure 4 As shown, the plurality of first reinforcing ribs 12 are formed into two groups, the two groups of first reinforcing ribs 12 are spaced apart along the first direction, and along the first direction, the plurality of second reinforcing ribs 13 are all located between the two groups of first reinforcing ribs 12. Thus, a relatively stable support network is formed by the layout of the plurality of first reinforcing ribs 12 and the plurality of second reinforcing ribs 13, so that the cover plate 1 can be effectively supported and reinforced in all directions, thereby effectively suppressing the deformation and distortion of the cover plate 1, maintaining the stability of its shape and structure, and further improving the structural strength.

[0060] In some embodiments of the present invention, Figure 3 and Figure 4 As shown, two ends of part of the second reinforcing ribs 13 along the first direction are spaced apart from the two groups of first reinforcing ribs 12. Thus, the structural strength of the first reinforcing ribs 12 and the second reinforcing ribs 13 is improved by such an arrangement, thereby improving the structural strength of the cover plate 1.

[0061] In some embodiments of the present invention, Figure 1 and Figure 2As shown, two ends of part of the second reinforcing ribs 13 along the first direction are connected to the two groups of first reinforcing ribs 12. Therefore, when the battery pack 100 is in a humid or rainy environment, moisture may accumulate on the cover plate 1, and the gap or channel as a drainage path is formed between the second reinforcing ribs 13 connected to the two groups of first reinforcing ribs 12, so that the moisture accumulated on the cover plate 1 can be discharged smoothly, thereby preventing the moisture from corroding and damaging the inside of the battery pack 100.

[0062] In a specific embodiment, Figure 1 and Figure 2 As shown, one end of the first reinforcing rib 12 extends along the first direction to the outer peripheral wall of the cover body 11, and the other end is spaced apart from the outer peripheral wall of the cover body 11, and one end of the second reinforcing rib 13 extends along the second direction to the outer peripheral wall of the cover body 11, and the other end is spaced apart from the outer peripheral wall of the cover body 11, and a plurality of first reinforcing ribs 12 are formed into two groups, and the two groups of first reinforcing ribs 12 are spaced apart along the first direction, and along the first direction, a plurality of second reinforcing ribs 13 are all located between the two groups of first reinforcing ribs 12, and some of the second reinforcing ribs 13 are connected to the two groups of first reinforcing ribs 12 at both ends along the first direction.

[0063] In a specific embodiment, Figure 3 As shown, one end of the first reinforcing rib 12 extends along the first direction to the outer peripheral wall of the cover body 11, and the other end is spaced apart from the outer peripheral wall of the cover body 11, and one end of the second reinforcing rib 13 extends along the second direction to the outer peripheral wall of the cover body 11, and the other end is spaced apart from the outer peripheral wall of the cover body 11, and a plurality of first reinforcing ribs 12 are formed into two groups, and the two groups of first reinforcing ribs 12 are spaced apart along the first direction, and along the first direction, a plurality of second reinforcing ribs 13 are all located between the two groups of first reinforcing ribs 12, and some of the second reinforcing ribs 13 are connected to the two groups of first reinforcing ribs 12 at both ends along the first direction.

[0064] In a specific embodiment, Figure 4 As shown, part of the first reinforcing ribs 12 extend to the outer peripheral wall of the cover body 11 at one end along the first direction, and are spaced from the outer peripheral wall of the cover body 11 at the other end, and the remaining part of the first reinforcing ribs 12 are spaced from the outer peripheral wall of the cover body 11 at both ends along the first direction, and the second reinforcing ribs 13 extend to the outer peripheral wall of the cover body 11 at one end along the second direction, and are spaced from the outer peripheral wall of the cover body 11 at the other end, and a plurality of first reinforcing ribs 12 are formed into two groups, the two groups of first reinforcing ribs 12 are spaced from each other along the first direction, and along the first direction, a plurality of second reinforcing ribs 13 are located between the two groups of first reinforcing ribs 12 and are spaced from the first reinforcing ribs 12.

[0065] In some embodiments of the present invention, Figure 5As shown, there are two first reinforcing ribs 12 and two second reinforcing ribs 13. The two first reinforcing ribs 12 and the two second reinforcing ribs 13 are connected end to end to form an annular structure. A plurality of third reinforcing ribs 14 are also provided on the cover body 11. The plurality of third reinforcing ribs 14 are all located in the annular structure and are radially spaced with the midpoint of the annular structure as the center.

[0066] Thus, the two first reinforcing ribs 12 and the two second reinforcing ribs 13 connected end to end to form an annular structure can effectively disperse the impact force from all directions, improve the overall structural strength of the cover plate 1, and provide all-round protection for the battery pack 100 using the cover plate 1. At the same time, the multiple third reinforcing ribs 14 support each other with the annular structure to form a more complete and stable support network, and the radial distribution of the multiple third reinforcing ribs 14 can effectively guide the transmission of force, avoid stress concentration when impacted, and further improve reliability.

[0067] It should be noted that the midpoint of the annular structure is the intersection of the diagonal lines of the annular structure. At the same time, the number of the third reinforcing ribs 14 can be flexibly set according to actual conditions. For example, the third reinforcing ribs 14 can be as follows: Figure 5 Eight are shown, but two, three, four, five, six, seven or more may also be provided, all of which are within the scope of protection of the present utility model.

[0068] In some embodiments of the present invention, Figure 5 As shown, a connection block 15 is also provided on the cover body 11, and the connection block 15 is located at the midpoint of the annular structure. One end of the length direction of the plurality of third reinforcing ribs 14 is connected to the connection block 15, and the other end is connected to the annular structure. Thus, by the connection block 15 being located at the midpoint of the annular structure and serving as the connection point between the third reinforcing ribs 14 and the annular structure, the third reinforcing ribs 14 can better disperse and withstand stress and impact force from all directions of the cover body 11, thereby enhancing the impact resistance and pressure resistance of the cover plate 1.

[0069] The battery pack 100 according to an embodiment of the present invention is described below.

[0070] The battery pack 100 according to the embodiment of the present invention includes a cover plate 1 .

[0071] According to the battery pack 100 of the embodiment of the utility model, a cover plate 1 is provided, and a first reinforcing rib 12 and a second reinforcing rib 13 are provided on the cover body 11, the first reinforcing rib 12 extends in a first direction and is in plurality, and the plurality of first reinforcing ribs 12 are spaced apart along the second direction, the second reinforcing rib 13 extends in a plurality along the second direction, and the plurality of second reinforcing ribs 13 are spaced apart along the first direction, and the first direction and the second direction are perpendicular, thereby effectively enhancing the overall strength and rigidity of the cover plate 1, and reducing the deformation of the cover plate 1 under the action of external force, so that the battery pack 100 meets the performance requirements of working conditions such as impact, bottom ball hit, thermal runaway and abnormal noise.

[0072] In some embodiments of the present invention, Figure 1 As shown, the battery pack 100 further includes a box body 2, a module assembly 3, a pressure plate 4 and a first buffer 5. The cover plate 1 is located above the box body 2 and connected to the box body 2, the cover plate 1 and the box body 2 define a receiving cavity 21, the module assembly 3 is located in the receiving cavity 21, the pressure plate 4 is located in the receiving cavity 21 and located above the module assembly 3, the pressure plate 4 is connected to the module assembly 3, the first buffer 5 is located in the receiving cavity 21 and located above the pressure plate 4, and the first buffer 5 is connected to the cover plate 1.

[0073] Thus, the cover plate 1 and the box body 2 are connected to ensure the sealing of the accommodating cavity 21, thereby protecting the module assembly 3, the pressure plate 4 and the first buffer member 5 and other structures located in the accommodating cavity 21, and improving the reliability of the battery pack 100. At the same time, the sandwich structure formed by the cover plate 1, the pressure plate 4 and the first buffer member 5 can effectively reduce the force on the module assembly 3 when the battery pack 100 is subjected to external impact force, thereby having higher rigidity and cavity buffering energy absorption function, thereby improving the structural rigidity of the battery pack 100.

[0074] Furthermore, the first buffer component 5 can be designed as a solid structure or a honeycomb structure, so as to ensure the buffering effect of the first buffer component 5, thereby having good impact resistance and energy absorption functions.

[0075] Furthermore, the pressing plate 4 is bonded to the module assembly 3, and the first buffer member 5 is bonded to the cover plate 1. Thus, the bonding connection can achieve connection while having the effect of simple operation, thereby reducing assembly difficulty, improving assembly efficiency, and reducing costs.

[0076] In some embodiments of the present invention, Figure 2As shown, the box body 2 includes a crossbeam 22, which extends along a first direction to divide the accommodating chamber 21 into a first sub-chamber 211 and a second sub-chamber 212. The module assembly 3 is located in the first sub-chamber 211, and the BMS (Battery Management System) and the BDU (Battery Disconnect Unit) are located in the second sub-chamber 212. The BMS has a second buffer 6 arranged on the crossbeam 22, and the BDU has a third buffer 7 arranged on the crossbeam 22. The lower surface of the cover plate 1 is connected to the upper surface of the second buffer 6 and the upper surface of the third buffer 7, respectively. Therefore, the rigidity of the cover plate 1 is further improved through such an arrangement, and the problems such as local cracking caused by stepping on the cover plate 1 are avoided, thereby improving the reliability of the battery pack 100.

[0077] Furthermore, the cover plate 1 is bonded to the second buffer member 6 and the third buffer member 7, respectively, and the first buffer member 5 is bonded to the cover plate 1. Thus, the bonding connection can achieve connection while having the effect of simple operation, thereby reducing assembly difficulty, improving assembly efficiency, and reducing costs.

[0078] In some embodiments of the present invention, Figure 1 As shown, the battery pack 100 also includes a liquid cooling plate 8, a fourth buffer component 9 and a bottom protective plate 10. The bottom protective plate 10 is located below the lower box body 2 and is connected to the lower box body 2. The liquid cooling plate 8 and the fourth buffer component 9 are both located between the bottom protective plate 10 and the lower box body 2, and the liquid cooling plate 8 is located above the fourth buffer component 9.

[0079] Therefore, the structural strength of the lower box 2 of the battery pack 100 can be improved by the liquid cooling plate 8, the fourth buffer member 9 and the bottom guard plate 10 to ensure reliable support for the module assembly 3, and the module assembly 3 can be heat exchanged by the liquid cooling plate 8 to meet the heat exchange requirements of the module assembly 3, such as heating or dissipating heat for the module assembly 3, etc., to ensure the safety of the battery pack 100, which is beneficial to improving the thermal management performance and safety performance of the battery pack 100.

[0080] In some embodiments, an adhesive is provided between the liquid cooling plate 8 and the module assembly 3, so that the module assembly 3 and the liquid cooling plate 8 are bonded and connected, ensuring that the module assembly 3 is reliably fixed on the liquid cooling plate 8, avoiding problems such as movement of the module assembly 3, ensuring the safety of the battery pack 100, and the adhesive can have a good thermal conductivity effect, which is beneficial to improving the heat exchange efficiency between the liquid cooling plate 8 and the module assembly 3.

[0081] In some embodiments, the liquid cooling plate 8 is connected to the lower box 2 by fasteners to ensure that the liquid cooling plate 8 is reliably connected to the frame assembly and is easy to disassemble. For example, the fasteners may be bolts or the like.

[0082] In some embodiments, Figure 6As shown, the cover body 11 is a flat plate, the battery pack 100 includes a box body 2 and a module assembly 3, the lower surface of the cover plate 1 and the module assembly 3 are directly bonded and connected, and the outer peripheral wall of the cover plate 1 is connected to the box body 2. Therefore, through such an arrangement, structures such as the pressure plate 4 and the first buffer member 5 are omitted, thereby simplifying the structure of the battery pack 100.

[0083] 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 embodiment or example 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 can be combined in any one or more embodiments or examples in a suitable manner.

[0084] 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 cover plate for a battery pack, characterized in that: include: A cover body, wherein a first reinforcing rib and a second reinforcing rib are provided on the cover body, wherein the first reinforcing rib extends along a first direction and is in plurality, and the plurality of the first reinforcing ribs are spaced apart along a second direction, wherein the second reinforcing rib extends along the second direction and is in plurality, and the plurality of the second reinforcing ribs are spaced apart along the first direction, and the first direction and the second direction are perpendicular.

2. The cover plate according to claim 1, characterized in that: The first reinforcing rib is concave downward or convex upward; And / or, the second reinforcing rib is concave downward or convex upward.

3. The cover plate according to claim 1, characterized in that: One end of the first reinforcing rib along the first direction extends to the outer peripheral wall of the cover body, and the other end is spaced apart from the outer peripheral wall of the cover body; And / or, one end of the second reinforcing rib along the second direction extends to the outer peripheral wall of the cover body, and the other end is spaced apart from the outer peripheral wall of the cover body.

4. The cover plate according to claim 1, characterized in that: Both ends of the first reinforcing rib along the first direction are spaced apart from the outer peripheral wall of the cover body; And / or, both ends of the second reinforcing rib along the first direction are spaced apart from the outer peripheral wall of the cover body.

5. The cover plate according to claim 1, characterized in that: The plurality of first reinforcing ribs are formed into two groups, the two groups of first reinforcing ribs are spaced apart along the first direction, and the plurality of second reinforcing ribs are located between the two groups of first reinforcing ribs along the first direction.

6. The cover plate according to claim 5, characterized in that: Two ends of a portion of the second reinforcing ribs along the first direction are spaced apart from two groups of the first reinforcing ribs; And / or, two ends of some of the second reinforcing ribs along the first direction are connected to two groups of the first reinforcing ribs.

7. The cover plate according to claim 1, characterized in that: There are two first reinforcing ribs and two second reinforcing ribs. The two first reinforcing ribs and the two second reinforcing ribs are connected end to end to form an annular structure. The cover body is also provided with a plurality of third reinforcing ribs. The plurality of third reinforcing ribs are all located in the annular structure and are radially spaced with the midpoint of the annular structure as the center.

8. The cover plate according to claim 7, characterized in that: The cover body is further provided with a connecting block, which is located at the midpoint of the annular structure. One end of the plurality of third reinforcing ribs in the length direction is connected to the connecting block, and the other end is connected to the annular structure.

9. A battery pack, characterized in that: Comprising the cover plate according to any one of claims 1-8.

10. The battery pack according to claim 9, characterized in that: Also includes: A box body, the cover plate is located above the box body and connected to the box body, and the cover plate and the box body define a receiving cavity; A module assembly, wherein the module assembly is located in the accommodating cavity; A pressing plate, the pressing plate is located in the accommodating cavity and above the module assembly, and the pressing plate is connected to the module assembly; A first buffer member is located in the accommodating cavity and above the pressing plate, and the first buffer member is connected to the cover plate.

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