Cover plate assembly, battery and electric device

Abstract

The invention relates to the technical field of batteries, in particular to a cover plate assembly, a battery and an electric device. The cover plate assembly comprises a cover plate body, a protective frame, a riveting piece and a pole column, the protective frame is connected with the connecting part, the first part protrudes out of the connecting part, the protective part is in a Z shape, the first part is provided with a first containing space, at least part of the pole group is arranged in the first containing space, and the first containing space is provided with a notch. The protection frame comprises a blocking plate and a support vertically arranged on the blocking plate, the blocking plate covers the corresponding notch, the pole penetrates through the cover plate body, the riveting piece is located on the outer side of the cover plate body, the pole is connected with the riveting piece, and the support protrudes out of the riveting piece and / or the pole. According to the cover plate assembly, the structural strength of the cover plate body can be improved, and the deformation resistance of the cover plate body is improved; the volume of the pole group is increased, so that the capacity of the battery is improved, and the pole group can be supported and protected and is prevented from moving or shifting.

Description

Technical Field

[0001] This invention relates to the field of battery technology, and in particular to a cover plate assembly, a battery, and an electrical device. Background Technology

[0002] In lithium-ion batteries, the cover plate assembly is a key component. It is connected to the housing to encapsulate the electrode assembly inside the housing. At the same time, the terminals on the cover plate assembly can lead out the electrode tabs of the electrode assembly, which can be used to connect to external circuits.

[0003] In related technologies, a cover plate assembly generally includes a riveting component, a first insulating component, a pole, a cover plate body, a second insulating component, and a sealing ring. The sealing ring is fitted over the pole. The pole's cylindrical portion passes sequentially through the second insulating component, the cover plate body, and the first insulating component from one side of the cover plate body and connects to the riveting component. The plate portion of the pole is pressed against the second insulating component. However, the above arrangement typically has the following problems:

[0004] 1) At least part of the terminal post and the rivet protrudes from the cover plate body. When the module is assembled, it will occupy external space and affect the assembly rate of the PACK. During transportation and assembly, the terminal post / rivet is often damaged by bumps and collisions, which will lead to poor battery performance, safety and appearance.

[0005] 2) Currently, the industry generally uses flat metal covers (such as aluminum alloy or nickel-plated steel), which are characterized by flat thin plates of uniform thickness. Although this structure has the advantages of convenient processing and low cost, it has disadvantages such as insufficient resistance to deformation and poor spatial adaptability, which has become a key bottleneck for increasing battery capacity.

[0006] Therefore, there is an urgent need for a cover plate assembly, battery, and power supply device to solve the above problems. Summary of the Invention

[0007] The purpose of this invention is to provide a cover plate assembly, a battery, and an electrical device that can improve the deformation resistance of the cover plate body, increase the battery capacity, and thus improve the battery performance.

[0008] To achieve the above objectives, the following technical solution is provided:

[0009] A cover plate assembly, comprising:

[0010] The cover plate body includes a connecting portion and protective portions disposed on both sides of the connecting portion in a first direction. The protective portions include a first portion and a second portion connected to each other. The first portion is connected to the connecting portion and protrudes from the connecting portion. The protective portions are Z-shaped. The first portion has a first accommodating space. At least a portion of the electrode assembly is disposed in the first accommodating space. The first accommodating space has a notch.

[0011] The protective frame includes a sealing plate and a support erected on the sealing plate, wherein the sealing plate covers the corresponding notch;

[0012] The rivet and the pole are provided, the pole passing through the cover plate body, the rivet being located on the outside of the cover plate body, the pole being connected to the rivet, and the bracket protruding from the rivet and / or the pole.

[0013] As an optional solution, the number of brackets is two, the two brackets are arranged along the second direction, the rivet is disposed between the two brackets, and the first direction is perpendicular to the second direction;

[0014] The protective frame also includes:

[0015] A reinforcing structure is connected to the sealing plate and / or the bracket, the reinforcing structure being disposed on the side of the bracket facing each other.

[0016] As an optional solution, the reinforcing structure has a dimension of W1 in the second direction, and the cover plate assembly further includes a first insulating member disposed between the riveting member and the cover plate body. The dimension of the first insulating member in the second direction is W2, and 1.3mm≤W1-W2≤10mm.

[0017] And / or, the distance between the top surface of the bracket and the top surface of the first insulating member in a third direction is H1, 5.5mm≤H1≤12mm, and the first direction is perpendicular to the third direction.

[0018] As an optional solution, the connecting portion is provided with a limiting groove, and at least a portion of the first insulating member is disposed within the limiting groove.

[0019] As an optional solution, the maximum distance between the two first parts in the first direction is L1, and the size of the cover plate body in the first direction is L2, where 0.5≤L1 / L2≤0.7.

[0020] As an optional solution, there are multiple poles, and the connecting part and the second part are respectively provided with poles, and the multiple poles are all connected to the riveting member.

[0021] A battery includes a housing and an electrode assembly, and also includes the aforementioned cover assembly, wherein the electrode assembly is disposed within the housing, the housing has an opening at at least one end, and the cover assembly covers the opening.

[0022] As an optional solution, the electrode group is provided with electrode tabs, and the cover plate assembly further includes:

[0023] A connector is connected to a pole post, and the tab is connected to the pole post and / or the connector.

[0024] As an optional solution, the cover plate body has a second accommodating space, and the connector is disposed within the second accommodating space.

[0025] An electrical device includes a main body and the aforementioned battery.

[0026] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0027] The cover plate assembly provided by this invention, by setting the cover plate body as a connecting part and a Z-shaped protective part, can significantly improve the deformation resistance of the cover plate body by utilizing the "angle enhancement effect" compared to the traditional flat cover plate. By setting a first accommodating space in the first part, at least a portion of the electrode group can be arranged in the first accommodating space, thereby increasing the volume of the electrode group and thus increasing the battery capacity. In addition, the first part can also support and protect the electrode group to prevent the electrode group from shifting or displacing. By setting the bracket protruding from the electrode post and / or the riveting part, the bracket can effectively protect the electrode post and the riveting part, reducing the possibility of the electrode post / riveting part being bumped or damaged during the manufacturing process.

[0028] The battery provided by this invention, by applying the above-mentioned cover plate assembly, has good resistance to deformation and high capacity.

[0029] The electrical device provided by the present invention, by using the above-mentioned battery, has good resistance to deformation and high capacity, thereby improving the battery life and service life of the electrical device. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of the present invention and these drawings without creative effort.

[0031] Figure 1 This is a schematic diagram of the battery structure provided in Embodiment 1 of the present invention;

[0032] Figure 2 This is a partial cross-sectional view of the battery provided in Embodiment 1 of the present invention;

[0033] Figure 3 This is a first structural schematic diagram of the cover plate assembly provided in Embodiment 1 of the present invention;

[0034] Figure 4 This is a schematic diagram of the second structure of the cover plate assembly provided in Embodiment 1 of the present invention;

[0035] Figure 5 This is an exploded view of the cover plate assembly provided in Embodiment 1 of the present invention;

[0036] Figure 6 This is a schematic diagram of the third structure of the cover plate assembly provided in Embodiment 1 of the present invention;

[0037] Figure 7 This is a schematic diagram of the fourth structure of the cover plate assembly provided in Embodiment 1 of the present invention;

[0038] Figure 8 for Figure 7 Sectional view at point AA;

[0039] Figure 9 This is a schematic diagram of the pole group provided in Embodiment 1 of the present invention;

[0040] Figure 10 This is a structural schematic diagram of the vehicle provided in Embodiment 2 of the present invention.

[0041] Figure label:

[0042] 10000, vehicles;

[0043] 1000, battery;

[0044] 100. Cover plate assembly;

[0045] 10. Cover plate body; 1001. Second accommodating space; 11. Connecting part; 111. Third part; 1111. Limiting groove; 112. Fourth part; 12. Protective part; 121. First part; 1211. First accommodating space; 12111. Notch; 122. Second part;

[0046] 20. Pole post;

[0047] 30. Riveted parts;

[0048] 40. First insulating component; 41. Receiving groove;

[0049] 50. Second insulating component;

[0050] 60. Sealing components;

[0051] 70. Connectors;

[0052] 80. Protective frame; 81. Sealing plate; 82. Support; 83. Reinforcing structure;

[0053] 200, Housing; 210, First side surface; 2101, Explosion-proof hole; 220, Second side surface; 221, First main body; 222, First protrusion; 300, Electrode assembly; 311, Second main body; 312, Second protrusion; 313, First electrode tab; 314, Second electrode tab;

[0054] 2000, controller; 3000, motor. Detailed Implementation

[0055] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0056] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0057] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0058] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0059] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0060] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0061] Example 1

[0062] like Figures 1-2 As shown, this embodiment provides a battery 1000, which includes a housing 200 and an electrode assembly 300. The electrode assembly 300 is disposed within the housing 200, and the housing 200 serves to support and protect the electrode assembly 300. The housing 200 can be made of plastic or metal. When the housing 200 is made of metal, it has better heat dissipation performance, higher strength, and can provide its own support.

[0063] The electrode assembly 300 in this application can be formed by winding or by stacking. Generally, the electrode assembly 300 includes at least a positive electrode, a separator, and a negative electrode.

[0064] Optionally, the housing 200 has at least one opening, and the battery 1000 also includes a cover assembly 100, which covers the opening of the housing 200. The electrode group 300 is connected to the cover assembly 100, and the cover assembly 100 is connected to the main body of the external electrical device, so as to realize the function of the battery 1000 supplying power to the main body of the electrical device.

[0065] Optionally, the cover assembly 100 includes a cover body 10, which covers the opening of the housing 200 to form a sealed structure with the housing 200, preventing external water, dust, and gas from entering the interior of the battery 1000, and at the same time preventing the electrolyte inside the battery 1000 from leaking.

[0066] Optionally, the cover plate assembly 100 further includes a terminal post 20 and a riveting member 30. The terminal post 20 includes a column portion and a plate portion. The column portion passes through the cover plate body 10, and the riveting member 30 is disposed on the outer side of the cover plate body 10. The terminal post 20 passes through the inner side of the cover plate body 10 and is riveted to the riveting member 30. The cover plate body 10 is sandwiched in the middle by the plate portion and the riveting member 30, so that the terminal post 20 and the riveting member 30 are respectively assembled with the cover plate body 10. The plate portion of the terminal post 20 is connected to the electrode group 300 through the electrode tab 310. The electrode group 300 can be connected to the external circuit through the terminal post 20, so that the battery 1000 can be charged and discharged.

[0067] In this embodiment, the housing 200 includes alternating first side surface 210 and second side surface 220, which together form a shell-like structure with openings at both ends to accommodate the electrode assembly 300. There are two cover plate assemblies 100, each covering a corresponding opening. One cover plate assembly 100 has a positive electrode post 20, and the other cover plate assembly 100 has a negative electrode post 20.

[0068] Optionally, an explosion-proof hole 2101 is provided on the first side 210. An explosion-proof valve is welded to the inner wall of the explosion-proof hole 2101. When an abnormality occurs inside the battery 1000, the gas pressure inside the housing 200 reaches the explosion-proof threshold of the explosion-proof valve. The explosion-proof valve opens, and the gas is discharged through the explosion-proof hole 2101, releasing the internal pressure of the housing 200, preventing the battery 1000 from thermal runaway and exploding or catching fire, and improving the safety of the battery 1000.

[0069] Optionally, the explosion-proof hole 2101 is located in the middle of the first side 210 to shorten the exhaust path.

[0070] In related technologies, at least a portion of the terminal post and the riveting parts protrude from the cover plate body. During transportation and assembly, the terminal post / riveting parts are often damaged by bumps and knocks, resulting in poor battery performance, safety, and appearance. Currently, the industry generally uses flat metal cover plates, which have shortcomings such as insufficient resistance to deformation and poor space adaptability, becoming a key bottleneck for increasing battery capacity.

[0071] To solve the above problems, such as Figures 2-5 As shown, the cover plate assembly 100 provided in this embodiment also includes a protective frame 80. The cover plate body 10 includes a connecting portion 11 and protective portions 12 disposed on both sides of the connecting portion 11 in a first direction. The protective portions 12 include a first portion 121 and a second portion 122 connected to each other. The first portion 121 is connected to the connecting portion 11 and protrudes from the connecting portion 11. The protective portion 12 is Z-shaped. The first portion 121 has a first accommodating space 1211. At least a portion of the pole group 300 is disposed in the first accommodating space 1211. The first accommodating space 1211 has a notch 12111. The protective frame 80 includes a sealing plate 81 and a bracket 82 erected on the sealing plate 81. The sealing plate 81 covers the corresponding notch 12111. The pole post 20 passes through the cover plate body 10. The riveting member 30 is located on the outside of the cover plate body 10. The pole post 20 is connected to the riveting member 30. The bracket 82 protrudes from the riveting member 30 and / or the pole post 20.

[0072] By setting the cover body 10 as a connecting part 11 and a Z-shaped protective part 12, compared with the traditional flat cover, the deformation resistance of the cover body 10 can be greatly improved by utilizing the "angle enhancement effect". By setting the first accommodating space 1211 in the first part 121, at least a part of the electrode assembly 300 is disposed in the first accommodating space 1211, which can increase the volume of the electrode assembly 300 and thereby increase the capacity of the battery 1000. In addition, the first part 121 can also support and protect the electrode assembly 300 to prevent the electrode assembly 300 from moving or shifting. By setting the bracket 82 to protrude from the electrode post 20 and / or the rivet 30, the bracket 82 can effectively protect the electrode post 20 and the rivet 30, reducing the possibility of the electrode post 20 / rivet 30 being bumped or damaged during the manufacturing process.

[0073] Optionally, the second side 220 includes a first main body 221 and a first protrusion 222. The first main body 221 is connected to the first side 210. The first protrusion 222 is formed by at least a portion of the first main body 221 extending outward in a third direction to form an opening that matches the shape of the cover body 10.

[0074] Optionally, there are multiple terminals 20, with terminals 20 respectively provided on the connecting part 11 and the second part 122, and all terminals 20 are connected to the riveting member 30. By providing multiple terminals 20, the current path can be optimized, internal resistance and local heat generation can be reduced, and the high-rate charge and discharge capability of the battery 1000 can be improved to meet high power requirements. By providing multiple terminals 20 connected to the same riveting member 30, the integration is improved, the number of connection points is reduced, and the risk of loose connections is reduced. In addition, the terminals 20 located in the second part 122 are protected by the first part 121 and the protective frame 80 to prevent damage such as bumps and knocks to the terminals 20 and the riveting member 30.

[0075] Optionally, the cover plate assembly 100 also includes a seal 60, which is sandwiched between the electrode post 20 and the cover plate body 10. The seal 60 can insulate and isolate the electrode post 20 and the cover plate body 10 to prevent short circuit between them. At the same time, the seal 60 can seal the gap between the electrode post 20 and the cover plate body 10 to prevent leakage of electrolyte or gas.

[0076] Optionally, the connecting portion 11 includes a third portion 111 and a fourth portion 112 erected on both sides of the third portion 111 along the first direction. The fourth portion 112 is connected to the first portion 121, and at least one pole post 20 is disposed in the third portion 111. Through the above arrangement, the fourth portion 112 can protect the pole post 20 disposed in the third portion 111, avoiding damage such as bumps to the pole post 20 and the riveting member 30.

[0077] Optionally, there are two brackets 82, which are arranged along the second direction. The rivet 30 is disposed between the two brackets 82 to further improve the protective effect of the brackets 82 on the rivet 30 and avoid damage to the rivet 30 such as bumps.

[0078] Optionally, the protective frame 80 also includes a reinforcing structure 83 connected to the sealing plate 81 and / or the bracket 82. The reinforcing structure 83 is located on the side of the bracket 82 facing each other. By providing the reinforcing structure 83, the overall strength of the protective frame 80 can be improved.

[0079] Optionally, the cover plate assembly 100 further includes a first insulating member 40, which is disposed between the riveting member 30 and the cover plate body 10 to ensure insulation between the riveting member 30 and the cover plate body 10 and to prevent short circuit between the riveting member 30 and the cover plate body 10.

[0080] Optionally, the first insulating member 40 has a receiving groove 41, and the riveting member 30 is disposed in the receiving groove 41 to avoid displacement of the riveting member 30 and to save space and simplify assembly.

[0081] Optionally, the connecting part 11 (specifically the third part 111) is provided with a limiting groove 1111, and at least a portion of the first insulating member 40 is provided in the limiting groove 1111. This is to limit the riveting member 30, prevent the riveting member 30 from moving relative to the cover plate body 10, and at the same time improve the strength of the connecting part 11, thereby further improving the deformation resistance of the cover plate body 10.

[0082] like Figure 6 As shown, the reinforcing structure 83 has a dimension of W1 in the second direction, and the first insulating member 40 has a dimension of W2 in the second direction, with 1.3mm ≤ W1-W2 ≤ 10mm, to facilitate the assembly of the riveting member 30 and to avoid the value of W1-W2 being too large and affecting the fast charging overcurrent requirement of the battery 1000. Exemplarily, the value of W1-W2 can be 1.3mm, 2mm, 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm, or 10mm. In other embodiments, the value of W1-W2 can also be any other value between 1.3mm and 10mm.

[0083] like Figure 6 As shown, the distance between the top surface of the bracket 82 and the top surface of the first insulating member 40 in a third direction is H1, where 5.5mm ≤ H1 ≤ 12mm. This ensures good protection for the riveted member 30 while avoiding an excessively large value of H1 that would increase the molding difficulty, weight, and cost of the protective frame 80. For example, the value of H1 can be 5.5mm, 6mm, 6.5mm, 7mm, 7.5mm, 8mm, 8.5mm, 9mm, 9.5mm, 10mm, 10.5mm, 11mm, 11.5mm, or 12mm. In other embodiments, the value of H1 can also be any other value between 5.5mm and 12mm.

[0084] like Figure 6 As shown, the wall thickness of the bracket 82 is T3, where 1.5mm ≤ T3 ≤ 4mm, to ensure that the bracket 82 has sufficient strength. Exemplarily, the value of T2 can be 1.5mm, 2mm, 2.5mm, 3mm, 3.5mm, or 4mm. In other embodiments, the value of T3 can also be any other value between 1.5mm and 4mm.

[0085] like Figure 6As shown, the cover plate body 10 has a dimension of W3 in the second direction, meaning the thickness of the battery 1000 is W3, where 16mm ≤ W3 ≤ 120mm. This avoids the disadvantages of an excessively thin battery 1000, such as insufficient structural strength, limited capacity, and performance; and avoids the disadvantages of an excessively thick battery 1000, such as low heat dissipation efficiency and susceptibility to thermal runaway. For example, the value of W3 can be 16mm, 17mm, 18mm, 19mm, 20mm, 30mm, 40mm, 50mm, 60mm, 70mm, 80mm, 90mm, 100mm, 110mm, or 120mm. In other embodiments, the value of W3 can also be any other value between 16mm and 120mm.

[0086] like Figure 7 and Figure 8 As shown, the maximum distance between the two first parts 121 in the first direction is L1, and the size of the cover body 10 in the first direction is L2, where 0.5 ≤ L1 / L2 ≤ 0.7, to ensure a good capacity increase effect and current carrying capacity of the battery 1000. When the value of L1 / L2 is too small, the proportion of the first part 121 in the first direction is insufficient, affecting the capacity increase of the battery 1000; when the value of L1 / L2 is too large, the proportion of the second part 122 in the first direction is too small, affecting the size of the riveting part 30 and the current carrying capacity and heat dissipation effect of the battery 1000. For example, the value of L1 / L2 can be 0.5, 0.52, 0.54, 0.56, 0.58, 0.6, 0.62, 0.64, 0.66, 0.68, or 0.7. In other embodiments, the value of L1 / L2 can also be any other value between 0.5 and 0.7.

[0087] Optionally, the cover plate assembly 100 also includes a connector 70. The electrode assembly 300 is provided with electrode tabs. The connector 70 is connected to the electrode post 20, and the electrode tabs are connected to the electrode post 20 and / or the connector 70. By providing the connector 70, the position of the electrode post 20 can be adapted, improving the flexibility of the production process.

[0088] Optionally, the cover assembly 100 further includes a second insulating member 50 disposed between the connector 70 and the cover body 10, which can prevent the connector 70 and the cover body 10 from short-circuiting.

[0089] Optionally, the cover body 10 also has a second accommodating space 1001, and the connector 70 is disposed in the second accommodating space 1001, which can prevent the connector 70 from occupying the internal space of the housing 200, thereby increasing the volume of the electrode assembly 300 that can be accommodated in the housing 200, so as to improve the capacity of the battery 1000.

[0090] like Figure 8As shown, the second part 122 has a dimension of H2 in the third direction, where 6mm ≤ H2 ≤ 20mm, to ensure that the second accommodating space 1001 can accommodate the connector 70, while avoiding an excessively large value of H2 that would make it difficult to form the cover body 10. Exemplarily, the value of H2 can be 6mm, 7mm, 8mm, 9mm, 10mm, 11mm, 12mm, 13mm, 14mm, 15mm, 16mm, 17mm, 18mm, 19mm, or 20mm. In other embodiments, the value of H2 can also be any other value between 6mm and 20mm.

[0091] Optionally, the maximum distance between the two fourth parts 112 in the first direction is L3, where 24mm ≤ L1 - L3 ≤ 140mm. This is to avoid the first accommodating space 1211 being too small due to an excessively small value of L1 - L3, which would affect the capacity increase effect of the battery 1000; and to avoid the cover body 10 being difficult to form due to an excessively large value of L1 - L3. For example, the value of L1 - L3 can be 24mm, 30mm, 40mm, 50mm, 60mm, 70mm, 80mm, 90mm, 100mm, 110mm, 120mm, 130mm, or 140mm. In other embodiments, the value of L1 - L3 can also be any other value between 24mm and 140mm.

[0092] Optionally, the included angle between the two fourth parts 112 is N, where 16° ≤ N ≤ 40°, to ensure a better forming effect of the cover body 10, while avoiding an excessively large value of N that would reduce the volume of the first accommodating space 1211. For example, the value of N can be 16°, 18°, 20°, 22°, 24°, 26°, 28°, 30°, 32°, 34°, 36°, 38°, or 40°. In other embodiments, the value of N can also be any other value between 16° and 40°.

[0093] like Figure 8 As shown, the wall thickness of the riveting component 30 is T2, where 2mm ≤ T2 ≤ 3.5mm, to ensure that the riveting component 30 has sufficient strength and meets the requirements for current carrying capacity. Exemplarily, the value of T2 can be 2mm, 2.1mm, 2.2mm, 2.3mm, 2.4mm, 2.5mm, 2.6mm, 2.7mm, 2.8mm, 2.9mm, 3mm, 3.1mm, 3.2mm, 3.3mm, 3.4mm, or 3.5mm. In other embodiments, the value of T2 can also be any other value between 2mm and 3.5mm.

[0094] Optionally, the wall thickness of the cover body 10 is T1, where 2mm ≤ T1 ≤ 3mm, to ensure that the cover body 10 has sufficient strength. Exemplarily, the value of T1 can be 2mm, 2.1mm, 2.2mm, 2.3mm, 2.4mm, 2.5mm, 2.6mm, 2.7mm, 2.8mm, 2.9mm, or 3mm. In other embodiments, the value of T1 can also be any other value between 2mm and 3mm.

[0095] like Figure 2 , Figure 8 and Figure 9 As shown, the electrode assembly 300 includes a second main body portion 311 and a second protrusion portion 312. The second protrusion portion 312 is formed by extending outward from at least a portion of the second main body portion 311. The second protrusion portion 312 is disposed in the first accommodating space 1211 to facilitate the assembly of the electrode assembly 300 and the cover plate body 10, while preventing the electrode assembly 300 from shifting.

[0096] like Figure 9 As shown, in this embodiment, the electrode includes a first electrode 313 and a second electrode 314. The first electrode 313 is L-shaped and connected to the second main body 311 and the second protrusion 312. The first electrode 313 is connected to the connector 70 and the electrode post 20 located at the second part 122. The second electrode 314 is connected to the connector 70 and the electrode post 20 located at the third part 111. This configuration allows the electrode area to be as large as possible, resulting in a large current-carrying area and a large welding area, thus improving current-carrying capacity to meet the requirements of high-capacity fast charging.

[0097]

[0098] Table 1 shows the wall thickness T1 of the cover body 10, the wall thickness T2 of the riveting member 30, the wall thickness T3 of the bracket 82, the included angle N between the two fourth parts 112, W1-W2, the distance H1, L1-L3, and L1 / L2 between the top surface of the bracket 82 and the top surface of the first insulating member 40 in the third direction, the dimension H2 of the second part 122 in the third direction, and the dimension W3 of the cover body 10 in the second direction. Examples 1-6 show the values ​​of T1, T2, T3, N, W1-W2, H1, L1-L3, L1 / L2, H2, and W3 when the battery 1000 has a yield rate >98%; Comparative Examples 1-6 show the values ​​of W1-W2, H1, and L1 / L2 when the battery 1000 has a yield rate <98%.

[0099] Specifically, after the battery 1000 is assembled, the molding quality and appearance quality of the battery 1000 are tested to detect the yield rate of the battery 1000 in the process.

[0100] In Examples 1-6, the values ​​of T1, T2, T3, N, W1-W2, H1, L1-L3, L1 / L2, H2, and W3 are all within the defined range. The yield rate of battery 1000 is >98%, and no abnormalities such as mismatch or strength between the cover plate body 10 and the shell 200 are observed. The riveting parts 30, terminal posts 20, electrode groups 300, and tabs 310 are all undamaged and undeformed. The current carrying capacity of the cover plate assembly 100 meets the requirements of battery 1000.

[0101] In Comparative Example 1, the values ​​of W1-W2 are too small, resulting in insufficient spacing between the reinforcing structure 83 and the riveting part 30. This is not conducive to the fixation of the assembly fixture and affects the assembly accuracy and efficiency of the riveting part 30.

[0102] In Comparative Example 2, the values ​​of W1-W2 are too large, and the distance between the reinforcing structure 83 and the riveting part 30 is too large, resulting in a limited width of the riveting part 30, which cannot effectively match the fast charging overcurrent requirements of the battery 1000.

[0103] In Comparative Example 3, the H1 value is too small, and the height difference between the bracket 82 and the rivet 30 is insufficient, resulting in insufficient protection level and the rivet 30 being bumped and interfered with.

[0104] In Comparative Example 4, the H1 value is too large, and the height difference between the bracket 82 and the rivet 30 is too large, which increases the difficulty of forming the protective frame 80, its weight, and its cost.

[0105] In Comparative Example 5, the value of L1 / L2 is too small, and the proportion of the first part 121 in the first direction is insufficient, which affects the improvement of the battery capacity of 1000.

[0106] In Comparative Example 6, the value of L1 / L2 is too large, and the proportion of the second part 122 in the first direction is too small, which affects the size of the riveting part 30 here and affects the current carrying capacity and heat dissipation effect of the battery 1000.

[0107] Example 2

[0108] This embodiment provides an electrical device, which includes a main body and a battery 1000 provided in Embodiment 1. The battery 1000 can provide power to the main body of the electrical device, thereby enabling the main body of the electrical device to automatically complete preset actions through power, ensuring good performance of the main body of the electrical device, and ensuring the service life and safety performance of the electrical device.

[0109] Specifically, the main body of the electrical device can be a vehicle, mobile phone, portable device, laptop, ship, spacecraft, electric toy, or power tool, etc. Vehicles can be gasoline-powered cars, natural gas-powered cars, or new energy vehicles; new energy vehicles can be pure electric vehicles or hybrid electric vehicles, etc.; spacecraft include airplanes, rockets, space shuttles, and spacecraft, etc.; electric toys include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc.; power tools include metal cutting power tools, grinding power tools, assembly power tools, and railway power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, or electric planers, etc. This embodiment does not limit the main body of the aforementioned electrical device.

[0110] The following examples are for illustrative purposes only. Figure 10 As shown, an embodiment of this application will be described using a vehicle 10000 as the main body of an electrical device. A battery 1000 is disposed inside the vehicle 10000, and the battery 1000 can be located at the bottom, head, or tail of the vehicle 10000. There can be one or more batteries 1000, and these batteries can be connected in series, in parallel, or in a mixed configuration. A mixed configuration means that some of the batteries 1000 are connected in series and others in parallel.

[0111] Battery 1000 can be used to power vehicle 10000, for example, battery 1000 can serve as the operating power source for vehicle 10000. Vehicle 10000 may also include controller 2000 and motor 3000, controller 2000 is used to control battery 1000 to power motor 3000, for example, to meet the power needs of vehicle 10000 during startup, navigation and driving.

[0112] In some embodiments of this application, the battery 1000 can not only serve as the operating power source for the vehicle 10000, but also as the driving power source for the vehicle 10000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 10000.

[0113] Note that in the description of this specification, references to terms such as "some embodiments," "other embodiments," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0114] The above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention, the scope of which is determined by the scope of the appended claims.

Claims

1. A cover plate assembly, characterized in that, include: The cover body (10) includes a connecting part (11) and protective parts (12) disposed on both sides of the connecting part (11) in a first direction. The protective parts (12) include a first part (121) and a second part (122) connected to each other. The first part (121) is connected to the connecting part (11) and protrudes from the connecting part (11). The protective parts (12) are Z-shaped. The first part (121) has a first accommodating space (1211). At least a portion of the pole group (300) is disposed in the first accommodating space (1211). The first accommodating space (1211) has a notch (12111). The protective frame (80) includes a sealing plate (81) and a bracket (82) erected on the sealing plate (81), the sealing plate (81) covering the corresponding notch (12111). The riveting component (30) and the pole post (20) are provided, the pole post (20) is inserted through the cover plate body (10), the riveting component (30) is located on the outside of the cover plate body (10), the pole post (20) is connected to the riveting component (30), and the bracket (82) protrudes from the riveting component (30) and / or the pole post (20).

2. The cover plate assembly according to claim 1, characterized in that, The number of brackets (82) is two, the two brackets (82) are arranged along the second direction, the rivet (30) is disposed between the two brackets (82), and the first direction is perpendicular to the second direction; The protective frame (80) also includes: A reinforcing structure (83) is connected to the sealing plate (81) and / or the bracket (82), the reinforcing structure (83) being disposed on one side of the bracket (82) facing each other.

3. The cover plate assembly according to claim 2, characterized in that, The reinforcing structure (83) has a dimension of W1 in the second direction. The cover plate assembly also includes a first insulating member (40), which is disposed between the riveting member (30) and the cover plate body (10). The first insulating member (40) has a dimension of W2 in the second direction, and 1.3mm≤W1-W2≤10mm. And / or, the distance between the top surface of the bracket (82) and the top surface of the first insulating member (40) in a third direction is H1, 5.5mm≤H1≤12mm, and the first direction is perpendicular to the third direction.

4. The cover plate assembly according to claim 3, characterized in that, The connecting part (11) is provided with a limiting groove (1111), and at least a portion of the first insulating member (40) is disposed in the limiting groove (1111).

5. The cover plate assembly according to claim 1, characterized in that, The maximum distance between the two first parts (121) in the first direction is L1, and the size of the cover body (10) in the first direction is L2, 0.5≤L1 / L2≤0.

7.

6. The cover plate assembly according to any one of claims 1-5, characterized in that, The number of pole posts (20) is multiple, and the connecting part (11) and the second part (122) are respectively provided with pole posts (20), and the multiple pole posts (20) are all connected to the riveting member (30).

7. A battery comprising a casing (200) and an electrode assembly (300), characterized in that, It also includes a cover plate assembly as described in any one of claims 1-6, wherein the pole group (300) is disposed within the housing (200), the housing (200) has an opening at at least one end, and the cover plate assembly covers the opening.

8. The battery according to claim 7, characterized in that, The electrode assembly (300) is provided with electrode tabs, and the cover plate assembly further includes: A connector (70) is connected to a pole post (20), and the tab is connected to the pole post (20) and / or the connector (70).

9. The battery according to claim 8, characterized in that, The cover plate body (10) has a second accommodating space (1001), and the connector (70) is disposed in the second accommodating space (1001).

10. An electrical appliance, comprising an electrical appliance body, characterized in that, It also includes the battery as described in any one of claims 7-9.

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