Cover plate assembly, battery and electric equipment

Abstract

The utility model provides a cover plate assembly, a battery and electric equipment, and relates to the technical field of batteries. The cover plate assembly comprises an insulating part and a cover plate. Wherein the cover plate is connected with the insulating part, the face, facing the insulating part, of the cover plate is a reinforcing face, the reinforcing face comprises a first edge and a second edge which are connected, and the length of the first edge is larger than that of the second edge. The reinforcing face is provided with at least one first concave reinforcing rib, the first concave reinforcing rib comprises a first groove edge and a second groove edge which are arranged on the reinforcing face, the length of the first groove edge is larger than that of the second groove edge, and the first groove edge is basically parallel to the first edge. Through the cover plate assembly provided by the embodiment of the invention, the energy density and the use performance of the battery can be improved.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a cover plate assembly, a battery and an electrical device. Background Art

[0002] A battery is a device that can convert chemical energy into electrical energy, and can provide electrical energy to many electrical appliances, keeping them in working order. Existing batteries are widely used in power fields such as automobiles, engineering machinery and equipment, and ships. They can also be used for household energy storage, industrial and commercial energy storage, and communication base stations.

[0003] The battery generally includes a cover plate assembly and a shell, etc. Based on the structure of the existing cover plate assembly, there is a problem of low battery energy density. Utility Model Content

[0004] The present application provides a cover plate assembly, a battery and an electrical device to solve the problem of low battery energy density and improve the battery energy density and performance.

[0005] In the first aspect, the present application provides an example of a cover plate assembly, which includes an insulating member and a cover plate. The cover plate is connected to the insulating member, and the surface of the cover plate facing the insulating member is a reinforcement surface, and the reinforcement surface includes a first side and a second side connected to each other, and the length of the first side is greater than the length of the second side. At least one first concave reinforcement rib is provided on the reinforcement surface, and the first concave reinforcement rib includes a first groove edge and a second groove edge provided on the reinforcement surface, and the length of the first groove edge is greater than the length of the second groove edge, and the first groove edge and the first side are substantially parallel.

[0006] By providing the first concave reinforcing rib on the reinforcing surface, the weight of the cover plate can be reduced, thereby increasing the corresponding mass energy density of the battery and improving the performance of the battery.

[0007] In addition, by setting the first groove edge basically parallel to the first edge, that is, setting the first concave reinforcement rib along the first edge, the strength of the cover plate in the extension direction of the first edge can be increased, and the degree of deformation of the cover plate due to force along the extension direction of the first edge can be reduced, thereby ensuring the reliability of the connection between the cover plate and the insulating member, and further ensuring the reliability of the cover plate assembly.

[0008] Since the first concave reinforcement rib is arranged along the first edge, the first concave reinforcement rib can form a continuous support system along the first edge, thereby improving the force transmission path, allowing the cover plate to disperse the load more evenly when subjected to force, reducing the possibility of stress concentration on the cover plate, and improving the reliability of the cover plate assembly.

[0009] In some possible implementations, at least two first concave reinforcing ribs are provided, and two adjacent first concave reinforcing ribs are arranged at intervals.

[0010] At least two first concave reinforcing ribs arranged at intervals can further reduce the weight of the cover plate, further improve the corresponding mass energy density of the battery, and improve the performance of the battery.

[0011] In some possible implementations, the spacing distance between two adjacent first concave reinforcement ribs is greater than or equal to 2 mm.

[0012] By setting the spacing between two adjacent first concave reinforcing ribs to be greater than or equal to 2 mm, the possibility of the cover plate being easily deformed due to the first concave reinforcing ribs being set too densely can be reduced, thereby ensuring the strength of the cover plate and further ensuring the strength of the cover plate in use.

[0013] In some possible implementations, a second concave reinforcing rib is further provided on the reinforcing surface, and the second concave reinforcing rib includes a third groove edge and a fourth groove edge provided on the reinforcing surface, the length of the third groove edge is greater than the length of the fourth groove edge, and the third groove edge is basically parallel to the second side.

[0014] On the basis of providing the first concave reinforcing rib, providing the second concave reinforcing rib can further reduce the weight of the cover plate.

[0015] In addition, by setting the third groove edge basically parallel to the second side, that is, setting the second concave reinforcement rib along the second side, the strength of the cover plate in the extension direction of the second side can be increased, and the degree of deformation of the cover plate due to force along the extension direction of the second side can be reduced, thereby further ensuring the connection reliability between the cover plate and the insulating part, and then ensuring the reliability of the cover plate assembly.

[0016] Since the second concave reinforcement rib is arranged along the second edge, the second concave reinforcement rib can form a continuous support system along the second edge, improve the force transmission path, and enable the cover plate to disperse the load more evenly when subjected to force, further reduce the possibility of stress concentration on the cover plate, and improve the reliability of the cover plate assembly.

[0017] In some possible implementations, a third concave reinforcing rib is further provided on the reinforcing surface, and the third concave reinforcing rib includes a fifth groove edge and a sixth groove edge arranged on the reinforcing surface, the length of the fifth groove edge is greater than the length of the sixth groove edge, a first angle is provided between the extension direction of the fifth groove edge and the extension direction of the first edge, a second angle is provided between the extension direction of the fifth groove edge and the extension direction of the second edge, the first angle is greater than 0° and less than 180°, and the second angle is greater than 0° and less than 180°.

[0018] On the basis of providing the first concave reinforcing rib and the second concave reinforcing rib, providing the third concave reinforcing rib can further reduce the weight of the cover plate and improve the mass energy density of the battery.

[0019] In addition, since the fifth groove rib is part of the third concave reinforcing rib, the first concave reinforcing rib is substantially parallel to the first side, the second concave reinforcing rib is substantially parallel to the second side, and the extension direction of the fifth groove rib has a first angle with the extension direction of the first side, and the extension direction of the second groove rib has a second angle with the extension direction of the second side. Therefore, the extension direction of the third concave reinforcing rib can have a first angle with the extension direction of the first concave reinforcing rib, and the extension direction of the third concave reinforcing rib can have a second angle with the extension direction of the second concave reinforcing rib.

[0020] Therefore, simultaneously providing the third concave reinforcing rib, the second concave reinforcing rib and the first concave reinforcing rib can enhance the strength of the cover plate in different directions, reduce the degree of deformation of the cover plate due to force, further ensure the reliability of the connection between the cover plate and the insulating member, and thereby ensure the reliability of the cover plate assembly.

[0021] In some possible implementations, the first concave reinforcing rib includes a plurality of first segments disposed at intervals, and / or the second concave reinforcing rib includes a plurality of second segments disposed at intervals, and / or the third concave reinforcing rib includes a plurality of third segments disposed at intervals.

[0022] In some possible implementations, at least one first convex reinforcement rib is provided on a side of the insulating member facing the cover plate, and the first convex reinforcement rib can extend into the first concave reinforcement rib and at least partially contact the first concave reinforcement rib.

[0023] The first convex reinforcement rib can extend into the first concave reinforcement rib and cooperate with the first concave reinforcement rib. Since the first convex reinforcement rib is arranged on the insulating part and the first concave reinforcement rib is arranged on the cover plate, the connection reliability between the insulating pole piece and the cover plate can be ensured through the cooperation between the first convex reinforcement rib and the first concave reinforcement rib.

[0024] In addition, since the first convex reinforcement rib can extend into the first concave reinforcement rib and at least partially contact the first concave reinforcement rib, the contact area between the cover plate and the insulating member can be increased, the heat dissipation area of ​​the battery cell can be increased, and the safety of the battery cell can be ensured.

[0025] By providing the first convex reinforcing rib, the deformation resistance of the insulating component can be improved, the reliability of the cover plate assembly can be ensured, and the welding yield of the cover plate assembly can be further improved.

[0026] In some possible implementations, the cover plate assembly further includes an explosion-proof structure, and the explosion-proof structure is disposed between two adjacent first concave reinforcement ribs.

[0027] The second aspect of the present application provides a battery, which includes a battery cell, a shell and a cover assembly provided in any of the above examples, the shell is provided with a accommodating cavity, the battery cell is arranged in the accommodating cavity, and the cover assembly is arranged on one side of the battery cell and closes the cavity opening of the accommodating cavity.

[0028] The beneficial effects of the battery provided in the above second aspect and each possible design of the above second aspect can refer to the beneficial effects brought about by the above first aspect and each possible implementation method of the first aspect, and will not be repeated here.

[0029] A third aspect of the present application provides an electrical device, which includes the battery mentioned in the above example.

[0030] The beneficial effects of the electrical equipment provided in the third aspect and each possible design of the third aspect can be referred to the beneficial effects brought about by the second aspect and each possible implementation method of the second aspect, which will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 A schematic structural diagram of a cover assembly provided for example in this application.

[0032] Figure 2 A schematic diagram of the structure of a cover plate provided as an example of this application.

[0033] Figure 3 for Figure 2 Sectional view along AA.

[0034] Figure 4 A schematic diagram of the structure of another cover plate provided as an example of this application.

[0035] Figure 5 A schematic diagram of the structure of another cover assembly provided as an example of this application.

[0036] Figure 6 A schematic diagram of the structure of an insulating component provided as an example of this application.

[0037] Figure 7 for Figure 6 Cross-sectional view along BB.

[0038] Figure 8 A schematic diagram of the structure of another insulating member provided as an example of this application.

[0039] Fig. 9 A schematic diagram of the structure of another cover assembly provided as an example of this application.

[0040] Fig.10 for Fig. 9 Cross-sectional view along CC.

[0041] Fig.11 for Fig.10 A partial enlarged view of point A in the middle.

[0042] Fig.12 A schematic diagram of the structure of another insulating member provided as an example of this application.

[0043] Description of reference numerals:

[0044] 100. Cover plate assembly; 110. Cover plate; 111. Mounting hole; 112. Filling hole; 113. First concave reinforcing rib; 114. Second concave reinforcing rib; 115. Third concave reinforcing rib; 120. Insulator; 121. First convex reinforcing rib; 122. Second convex reinforcing rib; 123. Third convex reinforcing rib; 130. Pole. DETAILED DESCRIPTION

[0045] In order to make the purpose, technical solution and advantages of the examples of this application clearer, the technical solution in the examples of this application will be clearly and completely described below in conjunction with the drawings in the examples of this application. Obviously, the described examples are part of the examples of this application, not all of them. Based on the examples in this application, all other examples obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0046] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used in the specification of the application herein are only for the purpose of describing specific examples and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification, claims and drawings of this application are intended to cover non-exclusive inclusions.

[0047] Reference to "examples" herein means that a particular feature, structure, or characteristic described in conjunction with the examples may be included in at least one example of the present application. The appearance of the phrase "example" in various locations in the specification does not necessarily refer to the same example, nor is it an independent or alternative example that is mutually exclusive with other examples. It is explicitly and implicitly understood by those skilled in the art that the examples described herein may be combined with other examples.

[0048] The term "and / or" in this article is only a description of the association relationship of the associated objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists, A and B exist at the same time, and B exists. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0049] The directional words appearing in the following description are all directions shown in the figures, and do not limit the specific structure of the socket of the present application.

[0050] In addition, the terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects rather than to describe a specific order, and may explicitly or implicitly include one or more of the features.

[0051] In the description of the present application, unless otherwise specified, "plurality" means more than two (including two), and similarly, "multiple groups" means more than two groups (including two).

[0052] In the description of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, the "connection" or "connection" of a mechanical structure may refer to a physical connection. For example, the physical connection may be a fixed connection, such as a fixed connection through a barrier, such as a fixed connection through screws, bolts or other barrier; the physical connection may also be a detachable connection, such as a mutual snap-on or snap-fit ​​connection; the physical connection may also be an integral connection, such as a connection formed by welding, bonding or integral molding. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0053] A battery is a device that can provide electrical energy to electrical appliances, so that the appliances can be in working condition. The battery generally includes a cover plate assembly and a shell. Based on the structure of the existing cover plate assembly, in order to ensure the strength of the cover plate assembly, a raised reinforcing rib is provided on the cover plate. However, such a raised reinforcing rib will increase the mass of the battery, thereby reducing the mass energy density coefficient of the battery and reducing the performance of the battery.

[0054] Based on the above, the present application example provides a cover assembly, a battery and an electrical device.

[0055] In order to enable those skilled in the art to better understand the present application, the cover assembly and the battery provided in the example of the present application will be clearly and completely described below in conjunction with the accompanying drawings.

[0056] Exemplarily, the present application example provides an electrical device, which includes a battery.

[0057] The electrical equipment uses a battery as its power source. The electrical equipment may be, but is not limited to, a mobile phone, a tablet, a laptop, an electric toy, an electric tool, a battery car, an electric car, a ship, a spacecraft, etc.

[0058] Next, a brief introduction to the batteries mentioned in the above examples is given.

[0059] Exemplarily, the battery may include a housing, a cover assembly, and one or more battery cells. The housing is provided with a receiving cavity, the battery cell is arranged in the receiving cavity, and the cover assembly is arranged on one side of the battery cell and closes the cavity opening of the receiving cavity.

[0060] The shell can adopt various structures. For example, the shell can be a cylinder, a cuboid or other cubes.

[0061] In a battery, there can be multiple cells, and the multiple cells can be connected in series, in parallel, or in a mixed connection. A mixed connection means that the multiple cells are connected in series and in parallel. Multiple cells can be directly connected in series, in parallel, or in a mixed connection, and then the whole formed by the multiple cells is accommodated in a shell; of course, the battery can also be a battery module composed of multiple cells connected in series, in parallel, or in a mixed connection, and then the multiple battery modules are connected in series, in parallel, or in a mixed connection to form a whole, and accommodated in a shell. The battery can also include other structures. For example, the battery can also include a busbar component for realizing electrical connection between multiple battery cells. Each cell can be a secondary battery or a primary battery; it can also be a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited to this.

[0062] Next, the specific structure of the cover plate assembly is described in detail.

[0063] For example, Figure 1 A schematic diagram of the structure of a cover plate assembly provided for the example of this application, Figure 2 A schematic diagram of the structure of a cover plate provided for this application example, Figure 3 for Figure 2 For the cross-sectional view along AA, please refer to Figure 1 to Figure 3 , the cover plate assembly 100 may include an insulating member 120 and a cover plate 110. The cover plate 110 is connected to the insulating member 120, and the surface of the cover plate 110 facing the insulating member 120 is a reinforcement surface, and the reinforcement surface may include a first side and a second side connected to each other, and the length of the first side is greater than the length of the second side. At least one first concave reinforcement rib 113 may be provided on the reinforcement surface, and the first concave reinforcement rib 113 may include a first groove edge and a second groove edge provided on the reinforcement surface, the length of the first groove edge is greater than the length of the second groove edge, and the first groove edge and the first side are substantially parallel.

[0064] The side of the insulating member 120 facing the cover plate 110 may be a plane, and the side of the insulating member 120 facing the cover plate 110 may be provided with a protrusion.

[0065] The insulating member 120 and the cover plate 110 can be connected by welding, or they can be connected by a connecting member. The insulating member 120 and the cover plate 110 can have the same or different shapes. This application example only takes the cover plate 110 as an example for description.

[0066] The shape of the cover plate 110 can be adapted to the shape of the housing. The cover plate 110 can be prism-shaped, cylindrical, or in other shapes, which are not limited in this application example. This application example is described by taking the cover plate 110 as a substantially rectangular parallelepiped as an example.

[0067] The cover plate 110 may be made of metal materials such as copper and aluminum, and the insulating member 120 may be made of rubber or other insulating materials. The example of the present application does not limit the specific materials of the cover plate 110 and the insulating member 120 .

[0068] The surface of the cover plate 110 facing the insulating member 120 may be a reinforced surface, and the reinforced surface includes a first side and a second side. There may be an angle between the first side and the second side, and the angle may be an acute angle, a right angle, or an obtuse angle.

[0069] The first side may be the longest side of the reinforced surface, which is equivalent to the longest edge of all edges of the cover plate 110 . Taking the cross section of the cover plate 110 as an example, the first side is equivalent to the edge arranged along the length direction of the cover plate 110 .

[0070] From the perspective of material mechanics, when the cover plate 110 is acted upon by a force, if the force acts on a place other than the central axis of the cover plate 110, then the force will generate a moment on the cover plate 110. The moment is the effect of the force that causes the cover plate 110 to rotate. The magnitude of the moment depends not only on the magnitude of the force, but also on the lever arm, which refers to the distance from the point of force application to the center of rotation. For cover plates 110 of the same material and cross-sectional dimensions, a longer side means that under the same external force, the lever arm is longer, resulting in a larger bending moment and more obvious deformation.

[0071] In addition, stiffness is the ability of the material or the structure of the cover plate 110 to resist deformation. The stiffness of the material is related to the length, cross-sectional shape and size of the cover plate 110, as well as the properties of the material itself. For the cover plates 110 of the same material and cross-sectional shape, although their stiffness may be the same in terms of material properties, due to the longer length of the long side of the cover plate 110, under the same conditions, the smaller portion of the bending moment per unit length of the long side of the cover plate 110 when subjected to force is sufficient to cause a greater overall deformation, showing a lower overall rigidity. Therefore, under the action of the same force, deformation is more likely to occur along the first side of the cover plate 110 than along the second side, affecting the performance of the cover plate 110.

[0072] Based on this, the cover plate assembly provided in the present application is provided with at least one first concave reinforcing rib 113 on the reinforcing surface, and the surface of the cover plate 110 facing the insulating member 120 is the reinforcing surface.

[0073] The cross-section of the first concave reinforcing rib 113 may be rectangular, triangular, semicircular or other shapes, and this example of the application does not impose any specific limitation on this.

[0074] The opening of the first concave reinforcing rib 113 may be arranged on the reinforcing surface, and the opening of the first concave reinforcing rib 113 may be rectangular, pentagonal or other shapes.

[0075] The first concave reinforcing rib 113 includes a first groove edge and a second groove edge arranged on the reinforcing surface, and the length of the first groove edge is greater than the length of the second groove edge. Taking the opening of the first concave reinforcing rib 113 as an example of a rectangle, the first groove edge is greater than the second groove edge, and the first groove edge can be a groove edge arranged along the length direction of the first concave reinforcing rib 113.

[0076] The first concave reinforcing rib 113 can disperse the stress acting on the cover plate 110. When force acts on the cover plate 110, the first concave reinforcing rib 113 can cause the stress to be more evenly distributed in a larger area, reducing local stress concentration, thereby reducing the risk of breakage or plastic deformation of the cover plate 110.

[0077] The first concave reinforcing rib 113 can also increase the cross-sectional inertia moment of the cover plate 110, which is particularly important for resisting bending. The increased cross-sectional inertia moment means that the cover plate 110 has greater resistance when bending, that is, the bending stiffness of the cover plate 110 is increased, so that the cover plate 110 is not prone to bending deformation when subjected to force.

[0078] In addition, the first concave reinforcing rib 113 is arranged on the cover plate 110 and forms a whole with the cover plate 110, so that the strength of the material can be fully utilized. By using a thinner material and arranging the first concave reinforcing rib 113 on the cover plate 110, the load-bearing capacity of the cover plate 110 can reach the target load-bearing capacity, thereby realizing a lightweight design. The target load-bearing capacity refers to the maximum load-bearing capacity that the cover plate 110 needs to reach during the use of the cover plate 110.

[0079] The first groove edge may be substantially parallel to the first side. The first groove edge may be substantially parallel to the first side. Substantially parallel means that the angle between the first groove edge and the first side is less than or equal to 5°.

[0080] Based on the above, by providing the first concave reinforcing rib 113 on the reinforcing surface, the weight of the cover plate 110 can be reduced, thereby increasing the mass energy density of the battery and improving the performance of the battery.

[0081] In addition, by setting the first groove edge basically parallel to the first edge, that is, setting the first concave reinforcement rib 113 along the first edge, the strength of the cover plate 110 in the extension direction of the first edge can be increased, and the degree of deformation of the cover plate 110 due to force along the extension direction of the first edge can be reduced, thereby ensuring the connection reliability between the cover plate 110 and the insulating member 120, and further ensuring the reliability of the cover plate assembly 100.

[0082] Since the first concave reinforcement rib 113 is arranged along the first edge, the first concave reinforcement rib 113 can form a continuous support system along the first edge, thereby improving the force transmission path, so that the cover plate 110 can disperse the load more evenly when subjected to force, reducing the possibility of stress concentration on the cover plate 110, and improving the reliability of the cover plate assembly 100.

[0083] When the cover plate 110 is circular or in other shapes, the first concave reinforcing rib 113 may be ring-shaped or strip-shaped on the reinforcing surface. The example of the present application does not limit the specific implementation of the cover plate 110 and the first concave reinforcing rib 113 .

[0084] When the thickness (H) of the cover plate 110 is different, the depth (D) of the first concave reinforcing rib 113 is also different.

[0085] Exemplarily, when 1.2 mm ≤ H < 1.5 mm, D ≤ 0.5H.

[0086] When 0.5mm≤H<1.2mm, D≤0.3H.

[0087] When H<0.5mm, D≤0.2H.

[0088] When H≥1.5 mm, the strength of the cover plate 110 can meet the use requirements, so the first concave reinforcing rib 113 may not be provided.

[0089] Based on the cover plate assembly 100 provided in the above example, please refer to Figure 1 to Figure 3 At least two first concave reinforcing ribs 113 are provided, and two adjacent first concave reinforcing ribs 113 are arranged at intervals.

[0090] There may be two, three, four or even more first concave reinforcing ribs 113. Two adjacent first concave reinforcing ribs 113 may be arranged at intervals.

[0091] Two adjacent first concave reinforcing ribs 113 may be substantially parallel. Two adjacent first concave reinforcing ribs 113 being substantially parallel means that the angle between the two adjacent first concave reinforcing ribs 113 is less than or equal to 5°.

[0092] Compared with providing one first concave reinforcing rib 113 on the cover plate 110 , providing at least two first concave reinforcing ribs 113 can remove more structures on the cover plate 110 .

[0093] In summary, at least two first concave reinforcing ribs 113 arranged at intervals can further reduce the weight of the cover plate 110, further improve the corresponding mass energy density of the battery, and improve the performance of the battery.

[0094] Based on the cover plate assembly 100 provided in the above example, the spacing distance between two adjacent first concave reinforcing ribs 113 is greater than or equal to 2 mm.

[0095] By setting the spacing between two adjacent first concave reinforcing ribs 113 to be greater than or equal to 2 mm, the possibility of the cover plate 110 being easily deformed due to the first concave reinforcing ribs 113 being set too densely can be reduced, thereby ensuring the strength of the cover plate 110 and further ensuring the strength of the cover plate 110 in use.

[0096] Based on the cover plate assembly 100 provided in the above example, Figure 4 For a schematic diagram of another cover provided for this application example, please refer to Figure 4 A second concave reinforcing rib 114 may also be provided on the reinforcing surface. The second concave reinforcing rib 114 includes a third groove edge and a fourth groove edge provided on the reinforcing surface. The length of the third groove edge is greater than that of the fourth groove edge. The third groove edge is substantially parallel to the second side.

[0097] The number of the second concave reinforcing ribs 114 may be one, two, three or even more.

[0098] When at least two second concave reinforcing ribs are provided, two adjacent second concave reinforcing ribs 114 are substantially parallel. Two adjacent second concave reinforcing ribs 114 are substantially parallel, which means that the angle between the two adjacent second concave reinforcing ribs 114 is less than or equal to 5°.

[0099] The shape and arrangement of the second concave reinforcing rib 114 are similar to those of the first concave reinforcing rib 113 , and are not described in detail in this example of the present application.

[0100] The third groove edge is substantially parallel to the second side, which means that the angle between the third groove edge and the second side is less than or equal to 5°.

[0101] The second concave reinforcing rib 114 may have an intersection with the first concave reinforcing rib 113 , and the second concave reinforcing rib 114 may also be spaced apart from the first concave reinforcing rib.

[0102] In summary, on the basis of providing the first concave reinforcing rib 113 , providing the second concave reinforcing rib 114 can further reduce the weight of the cover plate 110 .

[0103] In addition, by setting the third groove edge basically parallel to the second edge, that is, setting the second concave reinforcement rib 114 along the second edge, the strength of the cover plate 110 in the extension direction of the second edge can be increased, and the degree of deformation of the cover plate 110 due to force along the extension direction of the second edge can be reduced, thereby further ensuring the connection reliability between the cover plate 110 and the insulating member 120, and further ensuring the reliability of the cover plate assembly 100.

[0104] Since the second concave reinforcement rib 114 is arranged along the second edge, the second concave reinforcement rib 114 can form a continuous support system along the second edge, thereby improving the force transmission path, so that the cover plate 110 can disperse the load more evenly when subjected to force, further reducing the possibility of stress concentration on the cover plate 110, and improving the reliability of the cover plate assembly 100.

[0105] Based on the cover plate assembly 100 provided in the above example, Figure 5 For a structural diagram of another cover assembly provided for this application example, please refer to Figure 5 A third concave reinforcing rib 115 may also be provided on the reinforcing surface. The third concave reinforcing rib 115 may include a fifth groove edge and a sixth groove edge provided on the reinforcing surface. The length of the fifth groove edge is greater than the length of the sixth groove edge. A first angle is provided between the extension direction of the fifth groove edge and the extension direction of the first side. A second angle is provided between the extension direction of the fifth groove edge and the extension direction of the second side. The first angle is greater than 0° and less than 180°, and the second angle is greater than 0° and less than 180°.

[0106] The number of the third concave reinforcing ribs 115 may be one, two, three or even more.

[0107] When at least two third concave reinforcing ribs are provided, two adjacent third concave reinforcing ribs 115 are substantially parallel. Two adjacent third concave reinforcing ribs 115 are substantially parallel, which means that the angle between two adjacent second concave reinforcing ribs 114 is less than or equal to 5°.

[0108] The shape and arrangement of the third concave reinforcing rib 115 are similar to those of the first concave reinforcing rib 113 , and are not described in detail in this example of the present application.

[0109] At least one of the first concave reinforcing rib 113 and the second concave reinforcing rib 114 may have an intersection with the third concave reinforcing rib 115 , and the third concave reinforcing rib 115 may also be spaced apart from the first concave reinforcing rib 113 and the second concave reinforcing rib 114 .

[0110] In summary, on the basis of providing the first concave reinforcing rib 113 and the second concave reinforcing rib 114 , providing the third concave reinforcing rib 115 can further reduce the weight of the cover plate 110 and improve the mass energy density of the battery.

[0111] In addition, since the fifth groove rib is a part of the third concave reinforcing rib 115, the first concave reinforcing rib 113 is substantially parallel to the first side, the second concave reinforcing rib 114 is substantially parallel to the second side, and the extension direction of the fifth groove rib has a first angle with the extension direction of the first side, and the extension direction of the second groove rib has a second angle with the extension direction of the second side. Therefore, the extension direction of the third concave reinforcing rib 115 and the extension direction of the first concave reinforcing rib 113 may have a first angle, and the extension direction of the third concave reinforcing rib 115 and the extension direction of the second concave reinforcing rib 114 may have a second angle.

[0112] Therefore, simultaneously providing the third concave reinforcing rib 115, the second concave reinforcing rib 114 and the first concave reinforcing rib 113 can also enhance the strength of the cover plate 110 in different directions, reduce the degree of deformation of the cover plate 110 due to force, further ensure the connection reliability between the cover plate 110 and the insulating member 120, and further ensure the reliability of the cover plate assembly 100.

[0113] Based on the cover plate assembly 100 provided in the above example, the first concave reinforcing rib includes a plurality of first segments disposed at intervals. And / or, the second concave reinforcing rib includes a plurality of second segments disposed at intervals. And / or, the third concave reinforcing rib includes a plurality of third segments disposed at intervals.

[0114] At least one of the first concave reinforcing rib, the second concave reinforcing rib and the third concave reinforcing rib may include a plurality of segments arranged at intervals, or any combination of two of them may include a plurality of segments arranged at intervals, or all three may include a plurality of segments arranged at intervals.

[0115] The first concave reinforcing rib, the second concave reinforcing rib and the third concave reinforcing rib are arranged in a similar manner, and the following description will only take the first concave reinforcing rib as an example.

[0116] A plurality of first segments arranged at intervals can be arranged along the extension direction of the first side to form a first concave reinforcing rib, and a first connecting protrusion is formed between two adjacent first segments. Similarly, a second connecting protrusion is formed between two adjacent second segments, and a third connecting protrusion is formed between two adjacent third segments.

[0117] A connecting protrusion is formed between two adjacent segments, so that the thickness of the cover plate 110 at the connecting protrusion is greater than the thickness of the cover plate 110 at the segment, thereby ensuring the use strength of the cover plate 110.

[0118] When there is an intersection between the first concave reinforcing rib and the second concave reinforcing rib, the intersection between the first concave reinforcing rib and the second concave reinforcing rib can be located at the intersection of the first segment and the second segment, or at the intersection of the first segment and the second connecting protrusion, or at the intersection of the first connecting protrusion and the second segment, or at the intersection of the first connecting protrusion and the second connecting protrusion.

[0119] The intersection between the first concave reinforcement rib and the second concave reinforcement rib is located at the intersection of the first segment and the second connecting protrusion, or at the intersection of the first connecting protrusion and the second segment, or at the intersection of the first connecting protrusion and the second connecting protrusion. The thickness of the cover plate at the intersection between the first concave reinforcement rib and the second concave reinforcement rib can be increased to ensure the use strength of the cover plate.

[0120] Based on the cover plate assembly 100 provided in the above example, the cover plate 110 may be provided with at least one of the first concave reinforcing rib 113, the second concave reinforcing rib 114 and the third concave reinforcing rib 115, or a combination of any two of the first concave reinforcing rib 113, the second concave reinforcing rib 114 and the third concave reinforcing rib 115 may be provided at the same time, or the first concave reinforcing rib 113, the second concave reinforcing rib 114 and the third concave reinforcing rib 115 may be provided at the same time, and the example of the present application does not make any specific limitation on this.

[0121] Based on the cover plate assembly 100 provided in the above example, Figure 6 A schematic diagram of the structure of an insulating member provided as an example of this application, Figure 7 for Figure 6 For the cross-sectional view along the middle BB, please refer to Figure 6 and Figure 7 At least one first convex reinforcement rib 121 is provided on the side of the insulating member 120 facing the cover plate 110 . The first convex reinforcement rib 121 can extend into the first concave reinforcement rib 113 and at least partially contact the first concave reinforcement rib 113 .

[0122] The shape of the first convex reinforcement rib 121 matches the shape of the first concave reinforcement rib 113 , and the size of the first convex reinforcement rib 121 matches the size of the first concave reinforcement rib 113 .

[0123] The first convex reinforcing rib 121 can extend into the first concave reinforcing rib 113 and cooperate with the first concave reinforcing rib 113. Since the first convex reinforcing rib 121 is arranged on the insulating member 120 and the first concave reinforcing rib 113 is arranged on the cover plate 110, the connection reliability between the insulating pole member and the cover plate 110 can be ensured by the cooperation between the first convex reinforcing rib 121 and the first concave reinforcing rib 113.

[0124] In addition, since the first convex reinforcement rib 121 can extend into the first concave reinforcement rib 113 and at least partially contact the first concave reinforcement rib 113, the contact area between the cover plate 110 and the insulating member 120 can be increased, the heat dissipation area of ​​the battery cell can be increased, and the safety of the battery cell can be ensured.

[0125] The first convex reinforcing rib 121 can also be provided to improve the anti-deformation capability of the insulating member 120 , thereby ensuring the reliability of the cover plate assembly 100 and further improving the welding yield of the cover plate assembly 100 .

[0126] Based on the cover plate assembly 100 provided in the above example, the contact surface between the first concave reinforcing rib 113 and the first convex reinforcing rib 121 is a plane or a curved surface.

[0127] Based on different implementations of the first concave reinforcing rib 113 and the first convex reinforcing rib 121 , the contact surface between the first concave reinforcing rib 113 and the first convex reinforcing rib 121 may be a plane or a curved surface.

[0128] Exemplarily, when the cross section of the first concave reinforcing rib 113 is a polygon such as a rectangle or a triangle, the contact surface between the first concave reinforcing rib 113 and the first convex reinforcing rib 121 may be a plane.

[0129] Exemplarily, when the cross section of the first concave reinforcing rib 113 is semicircular or wavy, the contact surface between the first concave reinforcing rib 113 and the first convex reinforcing rib 121 may be a curved surface.

[0130] Based on the cover plate assembly 100 provided in the above example, Figure 8 A schematic diagram of the structure of another insulating member provided as an example of this application, Fig. 9 A schematic diagram of the structure of another cover plate assembly provided as an example of this application, Fig.10 for Fig. 9 Cross-sectional view along CC, Fig.11 for Fig.10 Please refer to the partial enlarged view of point A in the middle. Figure 8 to Figure 11 The insulating member 120 may also be provided with a second convex reinforcing rib 122 on one side facing the cover plate 110, and the second convex reinforcing rib 122 cooperates with the second concave reinforcing rib 114. The second convex reinforcing rib 122 plays a similar role to the first convex reinforcing rib 121, and the present application example will not be repeated here.

[0131] Based on the cover plate assembly 100 provided in the above example, Fig.12 For a schematic diagram of another insulating member provided for this application example, please refer to Fig.12The insulating member 120 may also be provided with a third convex reinforcing rib 123 on one side facing the cover plate 110, and the third convex reinforcing rib 123 cooperates with the third concave reinforcing rib 115. The third convex reinforcing rib 123 plays a similar role to the first convex reinforcing rib 121, and the present application example will not be repeated here.

[0132] Based on the cover plate assembly 100 provided in the above example, the cover plate assembly 100 may further include an explosion-proof structure, and the explosion-proof structure is disposed between two adjacent first concave reinforcing ribs 113 .

[0133] The cover plate 110 may be provided with a mounting hole 111 , and the explosion-proof structure is mounted on the cover plate assembly 100 through the mounting hole 111 .

[0134] The safety of battery use can be ensured by setting up an explosion-proof structure.

[0135] Based on the cover plate assembly 100 provided in the above example, a liquid injection hole 112 is further provided on the cover plate assembly 100 , and the liquid injection hole 112 is provided between two adjacent first concave reinforcing ribs 113 .

[0136] The liquid injection hole 112 can be provided to facilitate the injection of electrolyte into the battery cell. During the use of the battery, gas can also be discharged through the liquid injection hole 112 to ensure the reliability of the battery cell.

[0137] Based on the cap plate assembly 100 provided in the above example, the cap plate assembly 100 further includes a pole 130 , and the electric energy converted in the battery cell can be output to the outside of the battery by setting the pole 130 .

[0138] Finally, it should be noted that the above embodiments are only specific implementation methods of the present application, but the protection scope of the present application is not limited thereto, and any changes or substitutions within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A cover plate assembly, characterized in that: include: Insulation parts; A cover plate connected to the insulating member, wherein a surface of the cover plate facing the insulating member is a reinforcement surface, and the reinforcement surface includes a first side and a second side connected to each other, and the length of the first side is greater than the length of the second side; At least one first concave reinforcing rib is provided on the reinforcing surface, and the first concave reinforcing rib includes a first groove edge and a second groove edge provided on the reinforcing surface, the length of the first groove edge is greater than the length of the second groove edge, and the first groove edge is substantially parallel to the first side.

2. The cover plate assembly according to claim 1, characterized in that: At least two of the first concave reinforcing ribs are provided, and two adjacent first concave reinforcing ribs are arranged at intervals.

3. The cover plate assembly according to claim 2, characterized in that: The spacing distance between two adjacent first concave reinforcing ribs is greater than or equal to 2 mm.

4. The cover plate assembly according to any one of claims 1 to 3, characterized in that: The reinforcement surface is also provided with a second concave reinforcement rib, which includes a third groove edge and a fourth groove edge provided on the reinforcement surface, the length of the third groove edge is greater than the length of the fourth groove edge, and the third groove edge is substantially parallel to the second side.

5. The cover plate assembly according to claim 4, characterized in that: A third concave reinforcing rib is also provided on the reinforcing surface, and the third concave reinforcing rib includes a fifth groove edge and a sixth groove edge arranged on the reinforcing surface, the length of the fifth groove edge is greater than the length of the sixth groove edge, a first angle is provided between the extension direction of the fifth groove edge and the extension direction of the first side, a second angle is provided between the extension direction of the fifth groove edge and the extension direction of the second side, the first angle is greater than 0° and less than 180°, and the second angle is greater than 0° and less than 180°.

6. The cover plate assembly according to claim 5, characterized in that: The first concave reinforcing rib comprises a plurality of first segments arranged at intervals; and / or, The second concave reinforcing rib comprises a plurality of second segments arranged at intervals; and / or, The third concave reinforcing rib includes a plurality of third segments arranged at intervals.

7. The cover plate assembly according to claim 1, characterized in that: At least one first convex reinforcing rib is disposed on a side of the insulating member facing the cover plate, and the first convex reinforcing rib can extend into the first concave reinforcing rib and at least partially contact the first concave reinforcing rib.

8. The cover plate assembly according to claim 1, characterized in that: It also includes an explosion-proof structure, which is arranged between two adjacent first concave reinforcing ribs.

9. A battery, characterized in that: It comprises a battery cell, a shell and a cover assembly as claimed in any one of claims 1 to 8. The shell is provided with a receiving cavity, the battery cell is arranged in the receiving cavity, and the cover plate assembly is arranged on one side of the battery cell and closes the cavity opening of the receiving cavity.

10. An electrical device, characterized in that: A battery comprising the battery of claim 9.

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