Cover body and battery pack

Abstract

The utility model provides a cover body and a battery pack, the cover body is suitable for the battery pack, the battery pack comprises a battery module, the cover body comprises a base plate and a frame body which is arranged on the peripheral side of the base plate in a surrounding mode and connected with the base plate, and the base plate and the frame body jointly define an installation space used for containing the battery module. The first reinforcing rib and the second reinforcing rib are arranged on the side, facing the installation space and / or deviating from the installation space, of the base plate, the middle of the first reinforcing rib intersects with the middle of the second reinforcing rib, the overall rigidity of the cover body can be remarkably improved through use of the first reinforcing rib and the second reinforcing rib, and the cover body is prevented from deforming due to external force in the transportation or use process.

Description

Technical Field

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

[0002] The battery pack generally includes a cover body, through which the battery module is covered to protect the battery module. However, in the related art, the top of the cover body is a flat surface, which has low strength and is at risk of being damaged by bumps and collisions. Utility Model Content

[0003] The embodiments of the utility model provide a cover body and a battery pack, which can improve the technical problem in the related art that the top of the cover body is a flat surface with low strength and there is a risk of damage due to bumps and collisions.

[0004] In a first aspect, an embodiment of the present utility model provides a cover.

[0005] In one embodiment, it includes a substrate and a frame body arranged around the substrate and connected to the substrate, the substrate and the frame body together form an installation space for accommodating a battery module, and the substrate is provided with a first reinforcing rib and a second reinforcing rib on one side facing the installation space and / or away from the installation space, and the middle parts of the first reinforcing rib and the second reinforcing rib intersect.

[0006] In one embodiment, the substrate has a plurality of corners, and the plurality of corners include two first corners arranged diagonally;

[0007] The two ends of the first reinforcing rib are arranged corresponding to the two first corners.

[0008] In one embodiment, along a direction away from the middle of the first reinforcing rib, the width of the first reinforcing rib adjacent to its end portion is gradually reduced.

[0009] In one embodiment, an end portion of the first reinforcing rib is disposed adjacent to the corresponding first corner.

[0010] In one embodiment, the plurality of corners include two second corners arranged diagonally, and along the circumference of the substrate, the second corners and the first corners are arranged alternately;

[0011] Two ends of the second reinforcing rib are arranged corresponding to the two second corners.

[0012] In one embodiment, along a direction away from the middle of the second reinforcing rib, the width of the second reinforcing rib adjacent to its end portion is gradually reduced.

[0013] In one embodiment, an end portion of the second reinforcing rib is disposed adjacent to the corresponding second corner.

[0014] In one embodiment, the thickness of the first reinforcing rib is H1, wherein 2 mm ≤ H1 ≤ 4 mm; and / or,

[0015] The thickness of the second reinforcing rib is H2, wherein 2mm≤H2≤4mm.

[0016] In one embodiment, the frame body includes a frame body and a connecting portion, one end of the frame body is connected to the peripheral side of the substrate, the connecting portion is extended along the circumference of the frame body and is arranged opposite to the substrate, the connecting portion is connected to the other end of the frame body, and the connecting portion is used to connect to the periphery of the liquid cooling plate.

[0017] In one embodiment, the connection portion is provided with a plurality of mounting holes, and the plurality of mounting holes are spaced apart along the circumference of the frame, and each of the mounting holes is used for inserting a screw connector to connect the cover body to the liquid cooling plate through the screw connector.

[0018] In one embodiment, the connection portion is further provided with a plurality of third reinforcing ribs, and each of the third reinforcing ribs is provided between two adjacent mounting holes.

[0019] In one embodiment, the thickness of the third reinforcing rib is H3, wherein 1 mm ≤ H3 ≤ 2 mm; and / or,

[0020] The width of the third reinforcing rib is K, wherein 3mm≤K≤6mm; and / or,

[0021] The length of the third reinforcing rib is L, wherein 100 mm ≤ L ≤ 150 mm.

[0022] In one embodiment, both ends of each of the third reinforcing ribs are provided with chamfers.

[0023] In a second aspect, an embodiment of the present invention provides a battery pack.

[0024] In one embodiment, the cover body includes the cover body as described above, the cover body includes a substrate and a frame body arranged around the substrate and connected to the substrate, the substrate and the frame body together form an installation space for accommodating a battery module, and the substrate is provided with a first reinforcing rib and a second reinforcing rib on one side facing the installation space and / or away from the installation space, and the middle parts of the first reinforcing rib and the second reinforcing rib intersect.

[0025] In one embodiment, it further includes:

[0026] A battery module is installed in the installation space;

[0027] A liquid cooling plate is attached to a side of the battery module away from the base plate, and the liquid cooling plate is connected to the frame.

[0028] Advantages of the embodiments of the present utility model:

[0029] In the embodiments of the present utility model, the use of the first reinforcing rib and the second reinforcing rib can significantly increase the overall rigidity of the cover body, preventing deformation due to external forces during transportation or use. This design can reduce the risk of damage to the battery module caused by mechanical shock. The design of the first reinforcing rib and the second reinforcing rib helps to disperse and absorb the impact force, reducing the force directly acting on the battery module, thereby reducing the risk of short circuit, overheating, and even explosion of the battery module caused by external forces. The layout of the first reinforcing rib and the second reinforcing rib can also serve as part of the heat dissipation path, helping to guide heat from the battery pack to the external environment, avoiding local overheating, and extending the life of the battery pack. Description of the Drawings

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present utility model. For those skilled in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0031] Figure 1 is a three-dimensional schematic diagram of the cover body provided by the embodiment of the present utility model;

[0032] Figure 2 is a three-dimensional schematic diagram of the battery pack provided by the embodiment of the present utility model;

[0033] Figure 3 is Figure 2 a partial enlarged schematic diagram at A in

[0034] Figure 4 is Figure 2 a top view schematic diagram of the battery pack shown;

[0035] Figure 5 is Figure 2 a front view schematic diagram of the battery pack shown.

[0036] Description of the Reference Numerals:

[0037] 100, battery pack;

[0038] 10, cover body;

[0039] 1, substrate, 11, corner, 111, first corner, 112, second corner;

[0040] 2, frame body, 21, frame main body, 22, connecting portion, 221, mounting hole;

[0041] 3, installation space;

[0042] 4. The first reinforcement rib;

[0043] 5. Second reinforcement rib;

[0044] 6. The third reinforcement rib;

[0045] 20. Liquid cooling plate;

[0046] 30. Screw-on parts. DETAILED DESCRIPTION

[0047] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model. In addition, it should be understood that the specific implementation methods described herein are only used to illustrate and explain the utility model, and are not used to limit the utility model. In the utility model, unless otherwise stated, the directional words used, such as "upper" and "lower", generally refer to the upper and lower parts of the device in actual use or working state, specifically the drawing direction in the accompanying drawings; while "inside" and "outside" refer to the outline of the device.

[0048] The battery pack generally includes a cover body, through which the battery module is covered to protect the battery module. However, in the related art, the top of the cover body is a flat surface, which has low strength and is at risk of being damaged by bumps and collisions.

[0049] In view of this, the utility model proposes a cover body. Figure 1 The 3D diagram of the cover provided by the embodiment of the utility model is shown in FIG. The overall rigidity of the cover provided by the utility model is significantly improved, which can prevent the cover from being deformed due to external forces. The cover will be described in detail in conjunction with the main drawings.

[0050] Reference Figure 1 The cover body 10 is suitable for a battery pack 100, which includes a battery module. The cover body 10 includes a substrate 1 and a frame body 2 which is arranged around the substrate 1 and connected to the substrate 1. The substrate 1 and the frame body 2 are jointly arranged to form an installation space 3 for accommodating the battery module. The substrate 1 is provided with a first reinforcing rib 4 and a second reinforcing rib 5 on one side facing the installation space 3 and / or away from the installation space 3, and the middle parts of the first reinforcing rib 4 and the second reinforcing rib 5 intersect.

[0051] In an embodiment of the utility model, the use of the first reinforcing rib 4 and the second reinforcing rib 5 can significantly increase the overall rigidity of the cover 10 to prevent deformation due to external forces during transportation or use. This design can reduce the risk of damage to the battery module due to mechanical impact. The design of the first reinforcing rib 4 and the second reinforcing rib 5 helps to disperse and absorb the impact force, reduce the force directly acting on the battery module, and thus reduce the risk of short circuit, overheating or even explosion due to external forces. The layout of the first reinforcing rib 4 and the second reinforcing rib 5 can also serve as part of the heat dissipation path to help guide the heat from the battery pack 100 to the external environment, avoid local overheating, and extend the life of the battery pack 100.

[0052] It should be noted that in the embodiment of the present application, the first reinforcing rib 4 and the second reinforcing rib 5 are arranged on the side of the substrate 1 away from the installation space 3, so that the installation space 3 can be avoided from being occupied, so that the installation space 3 can be installed with as many battery modules as possible, thereby improving the energy density of the battery pack 100. The first reinforcing rib 4 and the second reinforcing rib 5 are arranged on the outside of the substrate 1, which can maximize the installation space 3 inside the battery pack 100 and improve the space utilization. The first reinforcing rib 4 and the second reinforcing rib 5 are arranged on the outside of the substrate 1 to simplify the processing technology, improve manufacturing efficiency, and reduce processing difficulty.

[0053] Continue to refer to Figure 1 In one embodiment, the substrate 1 has a plurality of corners 11, the plurality of corners 11 include two first corners 111 arranged diagonally, and the two ends of the first reinforcing rib 4 are arranged corresponding to the two first corners 111, so that the corners 11 are structurally fragile parts and are susceptible to stress concentration. By fixing the two ends of the first reinforcing rib 4 at the two corners 11 on the diagonal line, the stress in these areas can be effectively dispersed and absorbed, thereby enhancing the stability and impact resistance of the cover 10. The diagonally arranged first reinforcing ribs 4 can significantly improve the torsion resistance of the cover 10 and prevent the cover 10 from deforming when subjected to torque.

[0054] Refer again Figure 1 In one embodiment, the width of the first reinforcing rib 4 adjacent to its end is set to decrease along the direction away from the middle of the first reinforcing rib 4, so that the central part of the first reinforcing rib 4 usually bears more stress, and the stress gradually decreases as it extends to both ends. By adjusting the width of the first reinforcing rib 4 so that it is widest in the center and gradually narrows toward both ends, the stress distribution can be better matched and the structural efficiency can be improved. Reducing the width of the end of the first reinforcing rib 4 can reduce material usage, thereby reducing the total weight of the cover 10, which is especially important for the battery pack 100 because lighter weight means higher energy efficiency and better mobility. The first reinforcing rib 4 with a gradually varying width may visually give people a smoother and more refined feeling, enhancing the aesthetics of the appearance of the cover 10.

[0055] Referring to Figure 1 Figure 1 , in one embodiment, the end of the first reinforcing rib 4 is disposed adjacent to the corresponding first corner 111. Thus, the corner 11 is usually the weakest part of the structure and is prone to stress concentration. Setting the end of the first reinforcing rib 4 close to the corner 11 can effectively enhance the structural strength of the corner 11 area and reduce the possibility of deformation under external impact or pressure. By extending both ends of the first reinforcing rib 4 to the vicinity of the two first corners 111, the area of the substrate 1 covered by the first reinforcing rib 4 can be increased, thereby increasing the overall rigidity of the cover 10 and reducing the deformation caused by vibration or collision during transportation or use, ensuring the structural integrity and safety of the battery pack 100. The first reinforcing rib 4 usually has good thermal conductivity, and the first reinforcing rib 4 located near the corner 11 can assist in the uniform distribution of heat energy, prevent local overheating, and is beneficial to the temperature control and thermal management of the battery pack 100.

[0056] Referring to Figure 1 Figure 1 , in one embodiment, the plurality of corners 11 includes two second corners 112 arranged diagonally. Along the circumferential direction of the substrate 1, the second corners 112 and the first corners 111 are alternately arranged. The two ends of the second reinforcing rib 5 are disposed corresponding to the two second corners 112. Thus, by arranging the second reinforcing rib 5 on the diagonal corresponding to the two second corners 112, the overall structural stability of the cover 10 can be further enhanced. This ensures the balance of the structural strength of the battery pack 100 in multiple directions and improves the compressive and impact resistance. The second reinforcing rib 5 not only increases the structural strength but also can be used as part of the heat conduction path to help the heat evenly distribute on the cover 10, avoiding the phenomenon of hot spots, and can ensure the long-term performance and safety of the battery pack 100. Arranging the second reinforcing rib 5 on the other diagonal of the cover 10 can significantly improve its anti-twisting ability. This design can prevent the battery pack 100 from deforming when subjected to torque. The first reinforcing rib 4 and the second reinforcing rib 5 are respectively located on the two diagonals of the cover 10, which can also enhance the aesthetic appearance of the battery pack 100.

[0057] Referring to Figure 1, in one embodiment, along the direction away from the middle of the second reinforcing rib 5, the width of the second reinforcing rib 5 adjacent to its end portion is arranged to decrease. The second reinforcing rib 5 with a wider middle can provide the maximum structural support, while the decreasing width towards both ends can ensure the reduction of material usage in areas with less stress while maintaining the necessary strength. By reducing the width of the end portion of the second reinforcing rib 5, the overall material usage can be reduced, thereby reducing the weight of the cover 10. This is particularly important for the battery pack 100 because a lighter weight means higher energy efficiency and better mobility. Additionally, reducing the material usage directly lowers the manufacturing cost. The decreasing width design often gives a streamlined visual experience, thus increasing the aesthetics of the cover 10.

[0058] Referring to Figure 1 , in one embodiment, the end portion of the second reinforcing rib 5 is adjacent to the corresponding second corner 112. Thus, the corner 11 is often a weak point in the structure, prone to stress accumulation and resulting in structural failure. Arranging the end portion of the second reinforcing rib 5 close to the second corner 112 can effectively enhance the structural strength of this area, preventing cracks or deformations when subjected to external impacts or pressures. The presence of the second reinforcing rib 5 can change the force transmission path, enabling the force to be more evenly distributed on the cover 10 rather than concentrated at a certain point. This helps reduce stress concentration and improve the overall structural stability and reliability of the cover 10. By making the end portion of the second reinforcing rib 5 adjacent to the second corner 112, the area of the cover substrate 1 covered by the second reinforcing rib 5 can be increased, thereby increasing the overall rigidity of the cover 10, reducing vibrations and deformations during transportation or use, and ensuring the safety of the internal components of the battery pack 100. The layout of the second reinforcing rib 5 can affect the distribution of heat energy. The reinforcing rib close to the corner 11 can help improve the heat conduction performance of the cover 10, promoting the uniform dissipation of heat energy from the battery pack 100 to the surrounding environment and avoiding local overheating.

[0059] In one embodiment, the thickness of the first reinforcing rib 4 is H1, where 2 mm ≤ H1 ≤ 4 mm. Thus, within this thickness range, the first reinforcing rib 4 can provide sufficient structural strength and rigidity to cope with various loads and impacts that the battery pack 100 may encounter during normal use and transportation, thereby protecting the battery module from damage. Selecting a thickness of 2 mm to 4 mm can achieve a lightweight design, which is particularly important for the battery pack 100 as it directly affects the portability and energy consumption of the overall device. At the same time, the thickness control of 2 mm to 4 mm also helps to save material costs and improve economic efficiency. The thickness of the first reinforcing rib 4 also affects its heat conduction performance. Within this range, the reinforcing rib can help the battery pack 100 conduct effective thermal management without affecting the structural strength, avoid overheating, and extend the battery life.

[0060] It should be noted that the thickness of the first reinforcing rib 4 can be 2mm, 2.1mm, 2.2mm, 2.4mm, 2.5mm, 2.7mm, 2.9mm, 3mm, 3.2mm, 3.4mm, 3.6mm, 3.9mm or 4mm, etc. The thickness of the first reinforcing rib 4 can be selected according to needs, and the present application does not limit this.

[0061] In addition, when the thickness of the first reinforcing rib 4 is less than 2mm, the first reinforcing rib 4 may not be able to provide sufficient structural support. Especially when bearing external forces or vibrations, it is prone to bending or breaking, thus affecting the overall structural stability and service life of the battery pack 100. The first reinforcing rib 4 is more likely to generate stress concentration when bearing loads, which may lead to fatigue and early failure of the first reinforcing rib 4. In addition to providing structural support, the first reinforcing rib 4 also plays a certain role in heat conduction. If the thickness is insufficient, it may affect the effective dispersion of heat energy, resulting in local overheating and affecting the performance and safety of the battery module. When the thickness of the first reinforcing rib 4 is greater than 4mm, the first reinforcing rib 4 will increase the overall weight of the cover 10. The increase in thickness means using more materials, which will directly lead to an increase in manufacturing costs. An overly thick first reinforcing rib 4 may affect the effective conduction and dispersion of heat energy, especially in a high-temperature environment, which may lead to local overheating and affect the performance and safety of the battery module. A relatively thick first reinforcing rib 4 may require more complex processes during manufacturing, such as higher forming pressure or longer cooling time, which may increase the complexity and cost of the manufacturing process.

[0062] In an embodiment, the thickness of the second reinforcing rib 5 is H2, where 2mm ≤ H2 ≤ 4mm. In this way, within this thickness range, the second reinforcing rib 5 can provide sufficient structural strength and rigidity to cope with various loads and impacts that the battery pack 100 may encounter during normal use and transportation, thereby protecting the battery module from damage. Selecting a thickness of 2mm to 4mm can achieve a lightweight design, which is particularly important for the battery pack 100 because it directly affects the portability and energy consumption of the overall device. At the same time, reasonably controlling the thickness also helps to save material costs and improve economic benefits. The thickness of the second reinforcing rib 5 also affects its heat conduction performance. Within this range, the second reinforcing rib 5 can help the battery pack 100 to conduct effective thermal management without affecting the structural strength, avoid overheating, and extend the battery life.

[0063] It should be noted that the thickness of the second reinforcing rib 5 can be 2mm, 2.1mm, 2.2mm, 2.4mm, 2.5mm, 2.7mm, 2.9mm, 3mm, 3.2mm, 3.4mm, 3.6mm, 3.9mm or 4mm, etc. The thickness of the second reinforcing rib 5 can be selected according to needs, and the present application does not limit this.

[0064] In addition, when the thickness of the second reinforcing rib 5 is less than 2 mm, the second reinforcing rib 5 may not be able to provide sufficient structural support. Especially when subjected to external forces or vibrations, it is prone to bending or breaking, thus affecting the overall structural stability and service life of the battery pack 100. The second reinforcing rib 5 is more likely to generate stress concentration when bearing loads, which may lead to fatigue and early failure of the second reinforcing rib 5. In addition to providing structural support, the second reinforcing rib 5 also plays a certain role in heat conduction. If the thickness is insufficient, it may affect the effective dispersion of heat energy, resulting in local overheating and affecting the performance and safety of the battery module. When the thickness of the second reinforcing rib 5 is greater than 4 mm, the second reinforcing rib 5 will increase the overall weight of the cover body 10. An increase in thickness means using more materials, which will directly lead to an increase in manufacturing costs. An overly thick second reinforcing rib 5 may affect the effective conduction and dispersion of heat energy, especially in a high-temperature environment, which may lead to local overheating and affect the performance and safety of the battery module. A relatively thick second reinforcing rib 5 may require more complex processes during manufacturing, such as higher forming pressure or longer cooling time, which may increase the complexity and cost of the manufacturing process.

[0065] Referring to Figure 1 and Figure 2 , Figure 2 FIG. [X] and FIG. [X] are three-dimensional schematic diagrams of the battery pack 100 provided by the embodiments of the present invention. In one embodiment, the frame body 2 includes a frame main body 21 and a connecting portion 22. One end of the frame main body 21 is connected to the peripheral side of the substrate 1. In this way, the frame main body 21 and the substrate 1 together form a complete frame structure, ensuring the structural integrity and stability of the cover body 10. This helps to disperse and resist external impacts, protecting the internal battery module from damage. The connecting portion 22 extends along the circumferential direction of the frame body 2 and is arranged opposite to the substrate 1. The connecting portion 22 is connected to the other end of the frame main body 21. The connecting portion 22 is used to connect to the periphery of the liquid cooling plate 20. In this way, it can ensure that the heat exchange effect between the liquid cooling plate 20 and the battery pack 100 is maximized, thereby improving the thermal management performance of the battery pack 100. This helps to keep the battery module within an appropriate working temperature range and extend the battery life. The connecting portion 22 being arranged opposite to the substrate 1 makes the installation of the liquid cooling plate 20 more convenient and rapid. This helps to improve the efficiency of the production line and reduce assembly errors.

[0066] It should be noted that there are various situations where the connecting portion 22 is arranged opposite to the substrate 1. For example, in one embodiment, along the thickness direction of the substrate 1, the projection of the connecting portion 22 is entirely within the projection of the substrate 1. In another embodiment, the projection of the connecting portion 22 and the projection of the substrate 1 are on both sides of the projection of the frame column body. In yet another embodiment, a part of the projection of the connecting portion 22 is within the projection of the substrate 1. Specifically, the present application does not limit the specific form of the relative arrangement of the connecting portion 22 and the substrate 1.

[0067] There are various ways in which the connecting portion 22 is connected to the periphery of the liquid cooling plate 20. For example, referring to Figure 1 and Figure 3 , Figure 3 is Figure 2 a partial enlarged schematic view of area A in In one embodiment, the connecting portion 22 is provided with a plurality of mounting holes 221. The plurality of mounting holes 221 are circumferentially spaced along the frame 2. Each mounting hole 221 is used for inserting a screw member 30 to connect the cover body 10 and the liquid cooling plate 20 through the screw member 30. In this way, the combination of the plurality of mounting holes 221 and the screw member 30 can ensure a firm connection between the cover body 10 and the liquid cooling plate 20. The plurality of mounting holes 221 circumferentially spaced along the frame 2 simplify the assembly process, making the installation of the liquid cooling plate 20 simpler and faster. This design helps to improve the efficiency of the production line and reduce assembly errors. The use of the screw member 30 enables the liquid cooling plate 20 to be easily disassembled and replaced, facilitating daily maintenance and inspection. In addition, the screw member 30 connecting the liquid cooling plate 20 and the cover body 10 can improve the sealing performance between the liquid cooling plate 20 and the cover body 10, reducing the intrusion of external dust and moisture, and ensuring the long-term stable operation of the battery module.

[0068] There are various ways in which the connecting portion 22 is connected to the periphery of the liquid cooling plate 20. In another embodiment, the connecting portion 22 and the periphery of the liquid cooling plate 20 can be snap-fixed through a snap structure. In yet another embodiment, the connecting portion 22 and the periphery of the liquid cooling plate 20 can be connected by welding. In other embodiments, the connecting portion 22 and the periphery of the liquid cooling plate 20 can be connected by bonding, riveting or embedding, etc. Specifically, the way in which the connecting portion 22 is connected to the periphery of the liquid cooling plate 20 can be selected according to needs, and the present application does not limit this.

[0069] Referring to Figures 1 to 3, in some embodiments, the connecting portion 22 is further provided with a plurality of third reinforcing ribs 6. A third reinforcing rib 6 is provided between every two adjacent mounting holes 221. In this way, the third reinforcing rib 6 can significantly improve the structural strength of the connecting portion 22, especially around the mounting holes 221, where these areas are prone to stress concentration. The third reinforcing rib 6 helps to disperse and absorb these stresses, reducing deformation caused by external forces during use. By providing the third reinforcing rib 6 between every two adjacent mounting holes 221, it can ensure that the connecting portion 22 is more stable when bearing external loads. This helps to maintain a tight connection between the liquid cooling plate 20 and the cover body 10, and can maintain the reliability of the connection even under vibration or impact conditions. The third reinforcing rib 6 can be part of the heat conduction path, helping to guide heat from the battery pack 100 to the liquid cooling plate 20 for uniform distribution, avoiding local overheating. This is very important for maintaining the temperature consistency inside the battery pack 100, helping to improve the performance of the battery module and extend the life of the battery module. By adding the third reinforcing rib 6 at key positions, it is possible to reduce the use of materials in other non-critical areas without sacrificing the structural strength of the connecting portion 22, thereby achieving a lightweight design and reducing costs. The setting of the third reinforcing rib 6 can maintain a good connection between the liquid cooling plate 20 and the cover body 10 while reducing the number of mounting holes 221, preventing deformation at the connection between the liquid cooling plate 20 and the cover body 10.

[0070] In one embodiment, the thickness of the third reinforcing rib 6 is H3, where 1 mm ≤ H3 ≤ 2 mm. In this way, the thickness of the third reinforcing rib 6 within the range of 1 mm to 2 mm can ensure sufficient structural strength around the mounting holes 221 to cope with various loads and impacts that may be encountered during transportation and use. Additionally, limiting the thickness of the third reinforcing rib 6 between 1 mm and 2 mm helps to control the total weight of the battery pack 100 and can reduce the use of materials, thereby reducing the manufacturing cost. The thickness of the third reinforcing rib 6 within the range of 1 mm to 2 mm helps with the uniform distribution of heat, avoiding local overheating, which is very important for the thermal management of the battery pack 100 and can extend the battery life and improve safety.

[0071] It should be noted that the thickness of the third reinforcing rib 6 can be 1 mm, 1.1 mm, 1.2 mm, 1.4 mm, 1.5 mm, 1.7 mm, 1.9 mm, 2 mm, etc. The thickness of the third reinforcing rib 6 can be selected as needed, and this application does not make any limitations in this regard.

[0072] In addition, when the thickness of the third reinforcing rib 6 is less than 1 mm, it may not be able to provide sufficient structural support. Especially when subjected to external forces or vibrations, it is prone to bending or breaking, thus affecting the overall structural stability and service life of the battery pack 100. And when the thickness of the third reinforcing rib 6 is less than 1 mm, stress concentration is more likely to occur, which may lead to fatigue and early failure of the third reinforcing rib 6. In addition to providing structural support, the third reinforcing rib 6 also plays a certain role in heat conduction. If the thickness is insufficient, it may affect the effective dispersion of heat energy, resulting in local overheating and affecting the performance and safety of the battery module. When the thickness of the third reinforcing rib 6 is greater than 2 mm, it will increase the overall weight of the cover 10. In addition, an increase in thickness means using more materials, which will directly lead to an increase in manufacturing costs. When the thickness of the third reinforcing rib 6 is greater than 2 mm, it may affect the effective conduction and dispersion of heat energy, especially in a high-temperature environment, which may lead to local overheating and affect the performance and safety of the battery module. When the thickness of the third reinforcing rib 6 is greater than 2 mm, more complex processes may be required during manufacturing, such as higher forming pressure or longer cooling time, which may increase the complexity and cost of the manufacturing process.

[0073] In one embodiment, the width of the third reinforcing rib 6 is K, where 3 mm ≤ K ≤ 6 mm. In this way, within the width range of 3 mm to 6 mm, the third reinforcing rib 6 can provide sufficient structural strength and rigidity to cope with various loads and impacts that the battery pack 100 may encounter during normal use and transportation, thereby protecting the battery module from damage. Selecting a width of 3 mm to 6 mm can achieve a lightweight design, which is particularly important for the battery pack 100 because it directly affects the portability and energy consumption of the overall device. At the same time, reasonably controlling the width also helps to save material costs and improve economic benefits. The width of the third reinforcing rib 6 also affects its heat conduction performance. Within this range, the third reinforcing rib 6 can help the battery pack 100 perform effective thermal management without affecting the structural strength, avoid overheating, and extend the battery life. A width of 3 mm to 6 mm is feasible in various manufacturing processes, neither too fragile nor difficult to process, ensuring the feasibility of the design and production efficiency.

[0074] It should be noted that the width of the third reinforcing rib 6 can be 3 mm, 3.2 mm, 3.4 mm, 3.5 mm, 3.7 mm, 3.9 mm, 4 mm, 4.2 mm, 4.4 mm, 4.5 mm, 4.7 mm, 4.9 mm, 5 mm, 5.2 mm, 5.4 mm, 5.5 mm, 5.7 mm, 5.9 mm or 6 mm, etc. The width of the third reinforcing rib 6 can be selected as needed, and this application does not make any limitations in this regard.

[0075] In addition, when the width of the third reinforcing rib 6 is less than 3 mm, the third reinforcing rib 6 may not be able to provide sufficient structural support. Especially when subjected to external forces or vibrations, it is prone to bending or breaking, thereby affecting the overall structural stability and service life of the battery pack 100. The third reinforcing rib 6 with a width less than 3 mm is more likely to generate stress concentration when bearing loads, which may lead to fatigue and early failure of the third reinforcing rib 6. The third reinforcing rib 6 with a width less than 3 mm may affect the effective dispersion of heat energy, resulting in local overheating and affecting the performance and safety of the battery module. The third reinforcing rib 6 with a width less than 3 mm may face processing challenges during the manufacturing process. For example, it is prone to deformation, cracks and other problems during the forming process, increasing the production difficulty and the rejection rate. When the width of the third reinforcing rib 6 is greater than 6 mm, the third reinforcing rib 6 with a width greater than 6 mm will increase the overall weight of the cover 10 and increase the use of more materials, which will directly lead to an increase in manufacturing costs. The third reinforcing rib 6 with a width greater than 6 mm may affect the effective conduction and dispersion of heat energy, especially in a high-temperature environment, which may lead to local overheating and affect the performance and safety of the battery module. The wider reinforcing rib may require more complex processes during the manufacturing process, such as higher forming pressure or longer cooling time, which may increase the complexity and cost of the manufacturing process.

[0076] In one embodiment, the length of the third reinforcing rib 6 is L, where 100 mm ≤ L ≤ 150 mm. In this way, within the length range of 100 mm to 150 mm, the third reinforcing rib 6 can provide sufficient structural strength and rigidity to cope with various loads and impacts that the battery pack 100 may encounter during normal use and transportation, thereby protecting the battery module from damage. Selecting a length of 100 mm to 150 mm can achieve a lightweight design, which is particularly important for the battery pack 100 because it directly affects the portability and energy consumption of the overall device. At the same time, reasonably controlling the length also helps to save material costs and improve economic benefits. The length of the third reinforcing rib 6 also affects its heat conduction performance. Within this range, the third reinforcing rib 6 can help the battery pack 100 to conduct effective thermal management without affecting the structural strength, avoid overheating, and extend the battery life. A length of 100 mm to 150 mm is feasible in various manufacturing processes, neither too short to affect the structural performance nor too long to increase the manufacturing difficulty.

[0077] It should be noted that the length of the third reinforcing rib 6 can be 100 mm, 105 mm, 109 mm, 110 mm, 113 mm, 118 mm, 120 mm, 123 mm, 126 mm, 129 mm, 134 mm, 136 mm, 139 mm, 140 mm, 142 mm, 148 mm or 150 mm, etc. The length of the third reinforcing rib 6 can be selected as needed, and the present application does not make any limitations in this regard.

[0078] In addition, when the length of the third reinforcing rib 6 is less than 100 mm, the length of the third reinforcing rib 6 will be too short, and the third reinforcing rib 6 may not provide sufficient structural support. Especially when subjected to external forces or vibrations, it is prone to bending or breaking, thereby affecting the overall structural stability and service life of the battery pack 100. The shorter third reinforcing rib 6 is more likely to generate stress concentration when bearing loads, which may lead to fatigue and early failure of the third reinforcing rib 6. The insufficient length of the third reinforcing rib 6 may affect the effective dispersion of heat energy, resulting in local overheating and affecting the performance and safety of the battery module. Manufacturing a third reinforcing rib 6 that is too short may face processing challenges, such as deformation and cracks easily occurring during the forming process, increasing the production difficulty and scrap rate. When the length of the third reinforcing rib 6 is greater than 150 mm, thus, the third reinforcing rib 6 with a length greater than 150 mm will increase the overall weight of the cover 10, and at the same time, it also leads to the need to use more materials, which will directly result in an increase in manufacturing costs. The too-long third reinforcing rib 6 may affect the effective conduction and dispersion of heat energy, especially in a high-temperature environment, which may lead to local overheating and affect the performance and safety of the battery module. The longer third reinforcing rib 6 may require more complex processes during manufacturing, such as higher forming pressure or longer cooling time, which may increase the complexity and cost of the manufacturing process. In some cases, the too-long third reinforcing rib 6 may exceed the actual required structural strength, resulting in waste of materials.

[0079] Referring to Figure 3 , in one embodiment, chamfers are provided at both ends of each third reinforcing rib 6. Thus, the chamfers can reduce the sharp edges at both ends of the third reinforcing rib 6, help to disperse stress, and reduce stress concentration in these areas, thereby improving the overall structural strength and durability of the third reinforcing rib 6. The chamfers can reduce burrs or sharp edges that may appear during the processing, make the surface of the third reinforcing rib 6 smoother, and improve the processing quality and aesthetics. The chamfers can reduce the sharpness of the edges of the third reinforcing rib 6, reduce the risk of scratches or abrasions during assembly or use, and protect the internal components and external devices of the battery pack 100. The chamfers can reduce the jamming or scratching caused by sharp edges during the assembly process, make the installation of components such as the liquid cooling plate 20 more smooth, and simplify the assembly process. The chamfers can reduce the risk of injury to the human body caused by sharp edges, especially during maintenance and inspection, reduce the possibility of accidental scratches, and improve the operation safety. The chamfers may slightly improve the heat conduction path, help to disperse heat more evenly, and thus improve the thermal management performance.

[0080] It should be noted that, in one embodiment, the third reinforcing rib 6 is formed by sheet metal stretching. Chamfers are provided at both ends of each third reinforcing rib 6 to reduce the sharp edges at both ends of the third reinforcing rib 6, which helps to disperse stress and reduce stress concentration in these areas. During the sheet metal stretching process, the areas with stress concentration are prone to deformation or cracking, and chamfers can reduce this risk. Chamfers can improve the flow characteristics of the material during the stretching process, enabling the material to flow more evenly at both ends of the reinforcing rib and reducing the possibility of local deformation. Chamfers can reduce the frictional resistance between both ends of the reinforcing rib and the mold or other components during the stretching process, making it easier for the material to be formed into the predetermined shape and reducing the risk of deformation.

[0081] Referring to Figures 2 to 5 , Figure 4 is Figure 2 a top view schematic diagram of the battery pack 100 shown, Figure 5 is Figure 2 a front view schematic diagram of the battery pack 100 shown. The present utility model provides a battery pack 100, which includes the cover body 10 as described above. For the specific structure of the cover body 10, reference can be made to the above embodiments. Since this battery pack 100 adopts all the technical solutions of the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, and will not be elaborated here one by one.

[0082] In one embodiment, the battery pack 100 further includes a battery module and a liquid cooling plate 20. The battery module is installed in the installation space 3, and the liquid cooling plate 20 is attached to the side of the battery module facing away from the substrate 1. The liquid cooling plate 20 is connected to the frame body 2. The liquid cooling plate 20 is closely attached to the battery module, which can ensure efficient heat exchange, help the battery pack 100 module maintain within an appropriate working temperature range, extend the life of the battery pack 100, and improve the performance of the battery pack 100. The connection between the liquid cooling plate 20 and the frame body 2 can improve the overall structural stability of the battery pack 100 and ensure the safety of the battery module during transportation and use. The design of connecting the liquid cooling plate 20 to the frame body 2 can simplify the assembly process of the battery pack 100, facilitating mass production and maintenance. The liquid cooling plate 20 can serve as an additional protective layer to protect the battery module from the impact of the outside, improving the overall safety of the battery pack 100. The close attachment of the liquid cooling plate 20 to the battery module helps to improve the efficiency of the thermal management system and reduce energy loss. The connection method between the liquid cooling plate 20 and the frame body 2 enables the liquid cooling plate 20 to be easily replaced and maintained, simplifying the maintenance process. By closely combining the liquid cooling plate 20 with the battery module, the available space within the battery pack 100 can be maximized, improving the energy density.

[0083] The above has introduced the embodiments of the present utility model in detail. Specific examples are used herein to elaborate on the principle and implementation manner of the present utility model. The description of the above embodiments is only used to help understand the method and its core idea of the present utility model; at the same time, for those skilled in the art, according to the idea of the present utility model, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present utility model.

Claims

1. A cover body, suitable for a battery pack, the battery pack comprising a battery module, characterized in that: The cover body includes a base plate and a frame body which is arranged around the base plate and connected to the base plate, the base plate and the frame body together form an installation space for accommodating the battery module, and the base plate is provided with a first reinforcing rib and a second reinforcing rib on one side facing the installation space and / or away from the installation space, and the first reinforcing rib and the second reinforcing rib intersect in the middle.

2. The cover according to claim 1, characterized in that: The substrate has a plurality of corners, wherein the plurality of corners include two first corners arranged diagonally; The two ends of the first reinforcing rib are arranged corresponding to the two first corners.

3. The cover according to claim 2, characterized in that: Along the direction away from the middle of the first reinforcing rib, the width of the first reinforcing rib adjacent to its end portion is gradually reduced; and / or, An end portion of the first reinforcing rib is disposed adjacent to the corresponding first corner.

4. The cover according to claim 2, characterized in that: The plurality of corners further include two second corners arranged diagonally, and along the circumference of the substrate, the second corners and the first corners are arranged alternately; Two ends of the second reinforcing rib are arranged corresponding to the two second corners.

5. The cover according to claim 4, characterized in that: Along the direction away from the middle of the second reinforcing rib, the width of the second reinforcing rib adjacent to its end is gradually reduced; and / or, An end portion of the second reinforcing rib is disposed adjacent to the corresponding second corner.

6. The cover according to any one of claims 1 to 5, characterized in that: The thickness of the first reinforcing rib is H1, wherein 2mm≤H1≤4mm; and / or, The thickness of the second reinforcing rib is H2, wherein 2mm≤H2≤4mm.

7. The cover according to any one of claims 1 to 5, characterized in that: The frame includes a frame body and a connecting portion, one end of the frame body is connected to the peripheral side of the substrate, the connecting portion is extended along the circumference of the frame body and arranged opposite to the substrate, the connecting portion is connected to the other end of the frame body, and the connecting portion is used to be connected to the peripheral edge of the liquid cooling plate.

8. The cover according to claim 7, characterized in that: The connection portion is provided with a plurality of mounting holes, and the plurality of mounting holes are arranged at intervals along the circumference of the frame body, and each of the mounting holes is used for inserting a screw connector, so as to connect the cover body with the liquid cooling plate through the screw connector.

9. The cover according to claim 8, characterized in that: The connecting portion is further provided with a plurality of third reinforcing ribs, and each of the third reinforcing ribs is provided between two adjacent mounting holes.

10. The cover according to claim 9, characterized in that: The thickness of the third reinforcing rib is H3, wherein 1mm≤H3≤2mm; and / or, The width of the third reinforcing rib is K, wherein 3mm≤K≤6mm; and / or, The length of the third reinforcing rib is L, wherein 100 mm ≤ L ≤ 150 mm; and / or, Both ends of each of the third reinforcing ribs are provided with chamfers.

11. A battery pack, characterized in that: It comprises the cover body according to any one of claims 1 to 10.

12. The battery pack according to claim 11, characterized in that: Also includes: A battery module is installed in the installation space; A liquid cooling plate is attached to a side of the battery module away from the base plate, and the liquid cooling plate is connected to the frame.

Images