A top cover assembly, a battery, a battery module, a battery pack, and a power utilization device

Abstract

This utility model provides a top cover assembly, a battery, a battery module, a battery pack, and an electrical device. The top cover assembly includes a top cover and a fluid guide. The fluid guide includes a first part and a second part. The first part is inserted through the top cover and partially protrudes from the outer surface of the top cover. The second part is located on the inner surface of the top cover and connected to the first part. The second part has a welding recess for welding with the battery cell. Using the electrical device, because the second part has a welding recess for welding with the battery cell, the welding recess can form a thinned area. During laser welding, the thinned area allows the laser energy to be more concentrated on the welding area. Due to the reduced thickness of the welding recess, the laser energy can more easily penetrate the material and reach the connection interface between the second part and the battery cell, thereby increasing the welding penetration depth, improving the weld strength, reducing heat loss during the welding process, reducing the thermal impact on surrounding materials, and further improving welding quality and efficiency.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, specifically to a top cover assembly, a battery, a battery module, a battery pack, and an electrical device. Background Technology

[0002] A battery typically consists of a casing, a core, and a top cover assembly. The core is housed within the casing, and the top cover assembly is connected to the casing to seal it. The top cover assembly is also electrically connected to the core to output electrical energy.

[0003] In related technologies, the tabs of the battery cell are fixed to the terminals of the top cover assembly by welding with connectors. During the welding process, both the connectors and the terminals have a certain thickness, making it difficult to guarantee the welding quality. This can easily lead to the connectors and terminals separating, affecting the normal use of the battery. Utility Model Content

[0004] The embodiments of this utility model provide a top cover assembly, a battery, a battery module, a battery pack, and an electrical device, which can improve the technical problem of difficulty in ensuring welding quality in related technologies.

[0005] In a first aspect, embodiments of the present invention provide a top cover assembly, comprising:

[0006] Top cover; and,

[0007] The fluid guide includes a first part and a second part. The first part passes through the top cover and protrudes partially from the outer surface of the top cover. The second part is located on the inner surface of the top cover and is connected to the first part. The second part is provided with a welding recess for welding with the battery cell.

[0008] In some embodiments, at least a portion of the weld recess has an opening facing the top cover.

[0009] In some embodiments, the welding recess extends along the length of the top cover.

[0010] In some embodiments, the ratio of the length of the welding recess to the length of the second portion is greater than or equal to 1:3 and less than or equal to 1:2, and / or,

[0011] The ratio of the depth of the welding recess to the thickness of the second part is greater than or equal to 1:3 and less than or equal to 1:2.

[0012] In some embodiments, the second part is provided with a clearance hole, and the number of welding recesses is at least two, with the welding recesses provided on each side of the clearance hole along the width direction of the second part.

[0013] In some embodiments, the second part includes two branches, the clearance hole is disposed between the two branches, and each branch is provided with a welding recess for welding to different battery cells respectively.

[0014] In some embodiments, the top cover assembly further includes a connecting block connected to the first portion for connection to a busbar.

[0015] In some embodiments, the connecting block is configured as a ring, the connecting block is sleeved on the first part, and the side surface of the connecting block opposite to the top cover is flush with the side surface of the first part opposite to the top cover.

[0016] In some embodiments, the connecting block is spaced apart from the top cover to provide insulation between the connecting block and the top cover; and / or,

[0017] The second part is spaced apart from the top cover to provide insulation between the second part and the top cover.

[0018] Secondly, embodiments of the present invention provide a battery, including: a housing, a battery cell, and a top cover assembly as described in the previous embodiments. The housing is provided with a mounting cavity and an opening communicating with the mounting cavity. The battery cell is disposed in the mounting cavity, and the top cover assembly is connected to the opening to close the opening.

[0019] Thirdly, embodiments of this utility model provide a battery module, including the battery as described in the foregoing embodiments.

[0020] Fourthly, embodiments of the present invention provide a battery pack, including the battery pack described in the foregoing embodiments.

[0021] Fifthly, embodiments of the present invention provide an electrical device, including a battery as described in the foregoing embodiments, a battery module as described in the foregoing embodiments, or a battery pack as described in the foregoing embodiments.

[0022] The beneficial effects of the embodiments of this utility model are as follows:

[0023] In an embodiment of this utility model, since the second part is provided with a welding recess for welding with the battery cell, the welding recess can form a thinning area. During the laser welding process, the thinning area allows the laser energy to be applied more concentratedly to the welding part.

[0024] Furthermore, due to the reduced thickness of the welding recess, laser energy can penetrate the material more easily and reach the connection interface between the second part and the battery cell, thereby increasing the welding penetration depth, improving the weld strength, reducing heat loss during the welding process, reducing the thermal impact on surrounding materials, and further improving welding quality and efficiency. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the top cover assembly provided in an embodiment of the present invention;

[0027] Figure 2 A schematic diagram of the connecting piece provided in the embodiment of this utility model;

[0028] Figure 3 yes Figure 1 A structural schematic diagram of the top cover assembly from another angle;

[0029] Figure 4 yes Figure 3 Exploded view of the top cover assembly;

[0030] Figure 5 This is a schematic diagram of the battery structure provided in an embodiment of this utility model.

[0031] The labels in the diagram are as follows:

[0032] 1. Top cover assembly;

[0033] 11. Top cover;

[0034] 12. Fluid guide; 121. First part; 122. Second part; 1221. Welding recess; 1222. Clearance hole; 1223. Branch part;

[0035] 13. Connecting block;

[0036] 14. Insulating seals;

[0037] 2. Battery;

[0038] 21. Shell. Detailed Implementation

[0039] The embodiments of this application are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0040] To enable those skilled in the art to better understand the solutions of this application, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0041] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0042] Reference Figures 1 to 3 As shown, the first aspect of this utility model provides a top cover assembly 1, which includes a top cover 11 and a fluid guide 12. The fluid guide 12 includes a first part 121 and a second part 122. The first part 121 passes through the top cover 11 and partially protrudes from the outer surface of the top cover 11. The second part 122 is located on the inner surface of the top cover 11 and is connected to the first part 121. The second part 122 is provided with a welding recess 1221 for welding with the battery cell.

[0043] In the embodiments of this utility model, since the second part 122 is provided with a welding recess 1221 for welding with the battery cell, the welding recess 1221 can form a thinning area. During the laser welding process, the thinning area allows the laser energy to be applied more concentratedly to the welding part.

[0044] Furthermore, due to the reduced thickness of the welding recess 1221, laser energy can more easily penetrate the material and reach the connection interface between the second part 122 and the battery cell, thereby increasing the welding penetration depth, improving the welding strength, reducing heat loss during the welding process, reducing the thermal impact on surrounding materials, and further improving welding quality and efficiency.

[0045] In some embodiments, refer to Figure 2As shown, at least a portion of the opening of the welding recess 1221 faces the top cover 11.

[0046] This ensures the flatness of the welding surface between the battery cell and the welding recess 1221, thereby guaranteeing the welding effect.

[0047] In this way, the welding recess 1221 can reduce the thickness of the welding area, thereby increasing the penetration of the weld and improving the heat conduction efficiency during the welding process, thus improving the welding efficiency.

[0048] In some embodiments, refer to Figure 2 As shown, the welding recess 1221 extends along the length of the top cover 11.

[0049] Thus, by extending the welding recess 1221 along the length of the top cover 11, the welding area between the second part 122 and the battery cell is sufficient, so that the welding energy can be distributed more evenly in the welding area, thereby improving the stability and quality of the welding.

[0050] In some embodiments, refer to Figure 2 As shown, the ratio of the length of the welding recess 1221 to the length of the second part 122 is greater than or equal to 1:3 and less than or equal to 1:2, and / or,

[0051] The ratio of the depth of the welding recess 1221 to the thickness of the second part 122 is greater than or equal to 1:3 and less than or equal to 1:2.

[0052] By setting the above parameters, the area of ​​the welding recess 1221 on the second part 122 is ensured to be neither too large nor too small, thereby providing better welding conditions during the welding process.

[0053] Specifically, by setting the above parameters, it can be ensured that the welding recess 1221 has enough space to accommodate the welding material, while not weakening the structural strength of the second part 122 due to excessive size.

[0054] The parameter setting of the depth of the welding recess 1221 ensures that the welding recess 1221 can provide sufficient depth to guide laser energy, thereby improving welding penetration, while avoiding the reduction of the overall strength of the second part 122 due to the excessive depth of the welding recess 1221.

[0055] It should be noted that in this application, "and / or" describes the relationship between related objects, indicating that there can be three relationships. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / ", unless otherwise specified, generally indicates that the related objects before and after it are in an "or" relationship.

[0056] In some embodiments, refer to Figure 2 As shown, the second part 122 is provided with a clearance hole 1222 and the number of welding recesses 1221 is at least two. The clearance hole 1222 is provided with a welding recess 1221 on each side along the width direction of the second part 122.

[0057] Thus, the design of the clearance hole 1222 can effectively reduce the weight of the second part 122, while providing space for other components, avoiding structural interference, thereby optimizing the overall layout of the top cover assembly 1.

[0058] Secondly, by distributing the welding recesses 1221 on both sides of the clearance hole 1222, the welding points can be more evenly distributed in the width direction of the second part 122, so that the stress can be more evenly distributed during the welding process, avoiding welding defects or structural damage caused by stress concentration.

[0059] Meanwhile, the addition of multiple welding recesses 1221 increases the number of welding points, further improving the connection strength and stability between the second part 122 and the battery cell.

[0060] It is understandable that, in specific implementations, the clearance hole 1222 can be used to avoid the sealing nail or to avoid the injection hole. Of course, in other embodiments, it can also be set according to actual needs.

[0061] In some embodiments, refer to Figure 2 As shown, the second part 122 includes two branches 1223, and a clearance hole 1222 is provided between the two branches 1223. Each branch 1223 is provided with a welding recess 1221 for welding to different battery cells respectively.

[0062] The two branches 1223 of the second part 122 are connected to the tabs of different battery cells, which helps to improve the integration of the fluid conductor 12 and simplify the structure of the top cover assembly 1.

[0063] In some embodiments, refer to Figure 3 and Figure 4 As shown, the top cover assembly 1 also includes a connecting block 13, which is connected to the first part 121 for connection with the busbar.

[0064] Thus, the welding area between the first part 121 and the busbar can be increased by the connecting block 13, thereby ensuring the welding effect.

[0065] Thus, a larger welding area can also enhance the mechanical strength of the overall structure, making the connection between the connecting piece and the busbar more secure when the top cover assembly 1 is subjected to external force or vibration, and less likely to loosen or break.

[0066] In some embodiments, refer to Figure 3 and Figure 4As shown, the connecting block 13 is configured as a ring, and the connecting block 13 is sleeved on the first part 121, and the side surface of the connecting block 13 away from the top cover 11 is flush with the side surface of the first part 121 away from the top cover 11.

[0067] This ensures the flatness of the connection surface between the connecting block 13 and the busbar, thereby ensuring the welding effect between the connecting block 13 and the busbar, preventing the connecting block 13 and the busbar from separating due to poor welding effect, and ensuring connection.

[0068] In some embodiments, refer to Figure 3 and Figure 4 As shown, the connecting block and the top cover 11 are spaced apart for insulation between the connecting block 13 and the top cover 11; and / or, the second part 122 is spaced apart from the top cover 11 for insulation between the second part 122 and the top cover 11.

[0069] Thus, by spaced apart from the top cover 11 by the connecting block 13 and the top cover 11, and spaced apart from the second part 122, direct current conduction between these components can be effectively prevented, thereby ensuring the electrical safety of the top cover assembly 1 during use.

[0070] Of course, in specific implementation, insulating seals 14 can also be provided between the connecting block 13 and the top cover 11, and between the second part 122 and the top cover 11, to ensure the insulation state.

[0071] Secondly, this utility model embodiment provides a battery 2, referring to... Figure 5 As shown, it includes a housing 21, a battery cell, and a top cover assembly 1 as described in the previous embodiment. The housing 21 has a mounting cavity and an opening communicating with the mounting cavity. The battery cell is disposed in the mounting cavity, and the top cover assembly 1 is connected to the opening to close the opening.

[0072] The battery 2 has all the beneficial effects of the top cover assembly 1 in the aforementioned embodiments:

[0073] In the embodiments of this utility model, since the second part 122 is provided with a welding recess 1221 for welding with the battery cell, the welding recess 1221 can form a thinning area. During the laser welding process, the thinning area allows the laser energy to be applied more concentratedly to the welding part.

[0074] Furthermore, due to the reduced thickness of the welding recess 1221, laser energy can more easily penetrate the material and reach the connection interface between the second part 122 and the battery cell, thereby increasing the welding penetration depth, improving the welding strength, reducing heat loss during the welding process, reducing the thermal impact on surrounding materials, and further improving welding quality and efficiency.

[0075] The battery 2 includes a housing 21 and a top cover assembly 1. The housing 21 is used to encapsulate the positive electrode, the negative electrode, and the electrolyte.

[0076] The housing 21 may include a base plate and side plates connected to the base plate, the base plate and side plates forming a receiving cavity. The housing has an opening communicating with the receiving cavity, and a top cover assembly 1 can be placed over the opening to close the receiving cavity.

[0077] The casing 21 of battery 2 can be a hard casing, such as a hard plastic casing, an aluminum casing, or a steel casing; the casing 21 of battery 2 can also be a soft case, such as a pouch-type soft case. The material of the soft case can be plastic, such as at least one of polypropylene (PP), polybutylene terephthalate (PBT), and polybutylene succinate (PBS).

[0078] The battery 2 of this application may be in the form of a battery cell or a battery module. In some embodiments, the battery cells may be assembled into a battery module, and the number of battery cells contained in the battery module may be one or more, the specific number of which can be selected by those skilled in the art according to the application and capacity of the battery module.

[0079] Thirdly, this utility model embodiment provides a battery module, which includes the battery 2 in the aforementioned embodiment.

[0080] This battery module has all the beneficial effects of battery 2 in the aforementioned embodiments:

[0081] In the embodiments of this utility model, since the second part 122 is provided with a welding recess 1221 for welding with the battery cell, the welding recess 1221 can form a thinning area. During the laser welding process, the thinning area allows the laser energy to be applied more concentratedly to the welding part.

[0082] Furthermore, due to the reduced thickness of the welding recess 1221, laser energy can more easily penetrate the material and reach the connection interface between the second part 122 and the battery cell, thereby increasing the welding penetration depth, improving the welding strength, reducing heat loss during the welding process, reducing the thermal impact on surrounding materials, and further improving welding quality and efficiency.

[0083] Fourthly, this utility model embodiment provides a battery pack, which includes the battery module in the foregoing embodiments.

[0084] This battery pack possesses all the beneficial effects of the battery module described in the preceding embodiments:

[0085] In the embodiments of this utility model, since the second part 122 is provided with a welding recess 1221 for welding with the battery cell, the welding recess 1221 can form a thinning area. During the laser welding process, the thinning area allows the laser energy to be applied more concentratedly to the welding part.

[0086] Furthermore, due to the reduced thickness of the welding recess 1221, laser energy can more easily penetrate the material and reach the connection interface between the second part 122 and the battery cell, thereby increasing the welding penetration depth, improving the welding strength, reducing heat loss during the welding process, reducing the thermal impact on surrounding materials, and further improving welding quality and efficiency.

[0087] In some alternative implementations, the battery pack is assembled from one or more of the aforementioned battery modules or batteries 2, the specific number of which can be selected by those skilled in the art according to the application and capacity of the battery pack.

[0088] Fifthly, this utility model embodiment provides an electrical device, which includes the battery 2 in the foregoing embodiments, the battery module in the foregoing embodiments, or the battery pack in the foregoing embodiments.

[0089] The electrical device has all the beneficial effects of the battery 2 in the foregoing embodiments, the battery module in the foregoing embodiments, or the battery pack in the foregoing embodiments:

[0090] In the embodiments of this utility model, since the second part 122 is provided with a welding recess 1221 for welding with the battery cell, the welding recess 1221 can form a thinning area. During the laser welding process, the thinning area allows the laser energy to be applied more concentratedly to the welding part.

[0091] Furthermore, due to the reduced thickness of the welding recess 1221, laser energy can more easily penetrate the material and reach the connection interface between the second part 122 and the battery cell, thereby increasing the welding penetration depth, improving the welding strength, reducing heat loss during the welding process, reducing the thermal impact on surrounding materials, and further improving welding quality and efficiency.

[0092] Battery cells, battery modules, and battery packs can be used as power sources for electrical devices or as energy storage units for electrical devices. Electrical devices can include, but are not limited to, mobile devices (such as mobile phones, laptops, etc.), electric vehicles (such as pure electric vehicles, hybrid electric vehicles, plug-in hybrid electric vehicles, electric bicycles, electric scooters, electric golf carts, electric trucks, etc.), electric trains, ships and satellites, energy storage systems, etc.

[0093] As electrical equipment, battery cells, battery modules, or battery packs can be selected according to their usage requirements.

[0094] As one example, the electrical device can be a pure electric vehicle, a hybrid electric vehicle, a plug-in hybrid electric vehicle, etc. To meet the high power and high energy density requirements of the electrical device, a battery pack or battery module can be used.

[0095] Another example of the device could be a mobile phone, tablet computer, laptop computer, etc. This device typically requires a slim and lightweight design and can use a single battery cell as its power source.

[0096] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0097] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0098] The embodiments, implementation methods, and related technical features of this application can be combined and substituted for each other without conflict.

[0099] The above are merely preferred embodiments of this application and are not intended to limit this application in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this application without departing from the scope of the technical solution of this application shall still fall within the scope of the technical solution of this application.

Claims

1. A cap assembly, characterized by, include: Top cover (11); and, The fluid guide (12) includes a first part (121) and a second part (122). The first part (121) passes through the top cover (11) and protrudes partially from the outer surface of the top cover (11). The second part (122) is located on the inner surface of the top cover (11) and is connected to the first part (121). The second part (122) is provided with a welding recess (1221) for welding with the battery cell.

2. The roof assembly of claim 1, wherein, At least a portion of the opening of the welding recess (1221) faces the top cover (11).

3. The roof assembly of claim 1, wherein, The welding recess (1221) extends along the length of the top cover (11).

4. The roof assembly of claim 3, wherein, The ratio of the length of the welding recess (1221) to the length of the second part (122) is greater than or equal to 1:3 and less than or equal to 1:2, and / or, The ratio of the depth of the welding recess (1221) to the thickness of the second part (122) is greater than or equal to 1:3 and less than or equal to 1:

2.

5. The cap assembly of any one of claims 1 to 4, wherein, The second part (122) is provided with a clearance hole (1222), and the number of welding recesses (1221) is at least two. The clearance hole (1222) is provided with the welding recess (1221) on each side along the width direction of the second part (122).

6. The roof assembly of claim 5, wherein, The second part (122) includes two branches (1223), the clearance hole (1222) is disposed between the two branches (1223), and each branch (1223) is provided with a welding recess (1221) for welding to different cells respectively.

7. The roof assembly of any one of claims 1 to 4, wherein, The top cover assembly (1) further includes a connecting block (13) connected to the first part (121) for connection to the busbar.

8. The roof assembly of claim 7, wherein, The connecting block (13) is configured as a ring, and the connecting block (13) is sleeved on the first part (121). The side surface of the connecting block (13) away from the top cover (11) is flush with the side surface of the first part (121) away from the top cover (11).

9. The roof assembly of claim 8, wherein, The connecting block (13) is spaced apart from the top cover (11) for insulation between the connecting block (13) and the top cover (11); and / or, The second part (122) is spaced apart from the top cover (11) for insulation between the second part (122) and the top cover (11).

10. A battery, characterized by The device includes a housing (21), a battery cell, and a top cover assembly (1) as claimed in any one of claims 1 to 9. The housing (21) has a mounting cavity and an opening communicating with the mounting cavity. The battery cell is disposed in the mounting cavity, and the top cover assembly (1) is connected to the opening to close the opening.

11. A battery module, characterized by Includes the battery (2) as described in claim 10.

12. A battery pack, characterized by, Includes the battery module as described in claim 11.

13. An electrical device, characterized by Includes the battery (2) as described in claim 10, the battery module as described in claim 11, or the battery pack as described in claim 12.

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