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, a fluid guide, and a connecting block. The fluid guide passes through the top cover, with at least a portion protruding from the outer surface of the top cover. The connecting block is located on one side of the outer surface of the top cover, covering the fluid guide and electrically connected to it. The connecting block is used to connect to a busbar. By using this electrical device, the welding area between the fluid guide and the busbar is increased, thereby increasing the connection area between the fluid guide and the busbar. This significantly improves the stability and reliability of the electrical connection. In addition, the increased connection area can effectively reduce resistance and reduce the heat generated due to excessive resistance, thereby improving the heat dissipation performance of the assembly. At the same time, the larger welding area can also enhance the mechanical strength of the overall structure, making the connection between the fluid guide and the busbar more secure and less prone to loosening or breakage when the top cover assembly is subjected to external force or vibration.

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] In related technologies, batteries typically include a casing, a winding core, and a top cover assembly. The winding 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 winding 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. When the battery needs to be connected to other individual cells, the welding area is increased by passing the terminals through the connecting blocks. Therefore, it is often difficult to ensure that the terminals and connecting blocks are flat, which affects the welding effect. 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 problems of low assembly efficiency and the impact on the battery's overcurrent capacity in related technologies.

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

[0006] Top cover;

[0007] A fluid guide, the fluid guide passing through the top cover, at least a portion of the fluid guide protruding from the outer surface of the top cover; and...

[0008] A connecting block is located on one side of the outer surface of the top cover. The connecting block covers the fluid guide and is electrically connected to the fluid guide. The connecting block is used to connect to the manifold.

[0009] In one embodiment, the connecting block includes a first top wall and a first side wall that are connected to each other, the first side wall being connected to the side of the first top wall near the top cover, and a receiving groove being formed between the first top wall and the first side wall;

[0010] The portion of the fluid guide that protrudes from the outer surface of the top cover is housed within the receiving groove.

[0011] In one embodiment, the first sidewall is arranged in an annular shape, and the first sidewall is arranged around the outer periphery of the fluid guide.

[0012] In one embodiment, the top surface of the first top wall is a flat surface.

[0013] In one embodiment, a welding groove is provided on the first top wall, and the welding groove is welded and fixed to the fluid guide.

[0014] In one embodiment, the ratio of the thickness of the first top wall to the thickness of the fluid guide is greater than or equal to 1:3 and less than or equal to 1:2.

[0015] In one embodiment, the first top wall and the first side wall are integrally formed.

[0016] In one embodiment, the fluid guide includes a main body, a second top wall, and a second side wall. The second side wall is connected between the main body and the second top wall and passes through the top cover, such that the main body and the second top wall are located on the inner surface and outer surface of the top cover, respectively. The main body is used to connect the battery cell, and the second top wall is connected to the side of the second side wall away from the top cover for connection with the first top wall.

[0017] In one embodiment, the bottom side of the first sidewall is spaced apart from the top cover to provide insulation between the first sidewall and the top cover.

[0018] In one embodiment, the top cover assembly further includes a first insulating member, the first insulating member including a first connecting portion, a second connecting portion and a third connecting portion, the first connecting portion being disposed on the outer peripheral side of the first sidewall for insulation of the outer peripheral side of the first sidewall; the second connecting portion being disposed between the bottom side of the first sidewall and the top cover for insulation between the bottom side of the first sidewall and the top cover; the third connecting portion being disposed between the outer peripheral side of the second sidewall and the top cover for insulation between the outer peripheral side of the second sidewall and the top cover.

[0019] In one embodiment, the top cover assembly further includes a second insulating member disposed between the body portion and the top cover for insulation between the body portion and the top cover.

[0020] Secondly, embodiments of the present invention provide a battery, including: a housing, a battery cell, and a top cover assembly as described in the foregoing embodiments. The housing 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 is connected to the opening to close the opening.

[0021] Thirdly, embodiments of this utility model provide a battery module, including the battery as described in the foregoing embodiments.

[0022] Fourthly, embodiments of the present invention provide a battery pack, including the battery module as described in the foregoing embodiments.

[0023] 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.

[0024] The beneficial effects of the embodiments of this utility model are as follows:

[0025] In embodiments of this utility model, a connecting block is disposed on the fluid guide and electrically connected to the fluid guide for connection with the busbar. This ensures the flatness of the connection surface between the connecting block and the busbar, thereby ensuring the welding effect between the connecting block and the busbar and preventing separation of the connecting block and the busbar due to poor welding effect, thus ensuring the connection. Furthermore, the connecting block increases the welding area between the fluid guide and the busbar, thereby increasing the connection area between the fluid guide and the busbar. A larger welding area also enhances the mechanical strength of the overall structure, making the connection between the fluid guide and the busbar more secure when the top cover assembly is subjected to external force or vibration, and less prone to loosening or breakage. Attached Figure Description

[0026] 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.

[0027] Figure 1 This is a schematic diagram of the first structure of the top cover assembly provided in an embodiment of the present utility model;

[0028] Figure 2 This is an exploded view of the top cover assembly provided in an embodiment of this utility model;

[0029] Figure 3 It is at Figure 1 The diagram shows the structure of the connecting block in the top cover assembly.

[0030] Figure 4 It is at Figure 1 A partial cross-sectional view of the top cover assembly shown;

[0031] Figure 5 This is a schematic diagram of a second structure of the top cover assembly provided in an embodiment of the present invention;

[0032] Figure 6 It is at Figure 1 The diagram shows the structure of the fluid guide in the top cover assembly.

[0033] Figure 7 It is at Figure 1 A schematic diagram of the structure of the first insulating element in the top cover assembly is shown;

[0034] Figure 8 This is a schematic diagram of the battery structure provided in an embodiment of the present invention.

[0035] The labels in the diagram are as follows:

[0036] 1. Top cover assembly;

[0037] 11. Top cover;

[0038] 12. Fluid guide; 121. Main body; 122. Second top wall; 123. Second side wall;

[0039] 13. Connecting block; 131. First top wall; 132. First side wall; 133. Receiving groove; 134. Welding groove;

[0040] 14. First insulating component; 141. First connecting part; 142. Second connecting part; 143. Third connecting part;

[0041] 15. Second insulating component;

[0042] 2. Battery;

[0043] 21. Shell. Detailed Implementation

[0044] 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.

[0045] 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.

[0046] 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.

[0047] Reference Figure 1 and Figure 2 As shown, the first aspect of this utility model provides a top cover assembly 1, which includes a top cover 11, a fluid guide 12, and a connecting block 13. The fluid guide 12 passes through the top cover 11, and at least a portion of the fluid guide 12 protrudes from the outer surface of the top cover 11. The connecting block 13 is located on one side of the outer surface of the top cover 11, covers the fluid guide 12 and is electrically connected to the fluid guide 12, and is used to connect to a busbar.

[0048] In this embodiment of the present invention, the connecting block 13 is disposed on the guide fluid 12 and electrically connected to the guide fluid 12 for connection with the busbar. 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 and preventing the guide fluid 12 and the busbar from separating due to poor welding effect, thus ensuring the connection. Furthermore, the connecting block 13 increases the welding area between the guide fluid 12 and the busbar, thereby increasing the connection area between the guide fluid 12 and the busbar. The larger welding area also enhances the mechanical strength of the overall structure, making the connection between the guide fluid 12 and the busbar more secure when the top cover assembly 1 is subjected to external force or vibration, and less prone to loosening or breakage.

[0049] In some embodiments, refer to Figure 3 and Figure 4 As shown, the connecting block 13 includes a first top wall 131 and a first side wall 132 that are connected to each other. The first side wall 132 is connected to the side of the first top wall 131 near the top cover 11, and a receiving groove 133 is formed between the first top wall 131 and the first side wall 132.

[0050] The portion of the fluid guide 12 that protrudes from the outer surface of the top cover 11 is housed in the receiving groove 133.

[0051] This makes the connection between the fluid guide 12 and the connecting block 13 tighter and more stable.

[0052] Thus, the receiving groove 133 provides a defined space for the fluid guide 12, which can prevent the fluid guide 12 from shifting position during welding or use, thereby ensuring the quality of electrical connection between the fluid guide 12 and the connecting block 13.

[0053] Meanwhile, the guide fluid 12 is contained in the receiving groove 133, which allows for more accurate positioning and operation during welding, reducing the possibility of welding defects and helping to improve welding accuracy and efficiency.

[0054] In addition, the receiving groove 133 can also play a certain protective role for the guide fluid 12, preventing external factors from damaging the guide fluid 12, and further enhancing the reliability and durability of the top cover assembly 1.

[0055] In some embodiments, refer to Figures 1 to 3 As shown, the first sidewall 132 is arranged in a ring shape, and the first sidewall 132 is arranged around the outer periphery of the fluid guide 12.

[0056] Thus, the first sidewall 132 is arranged in a ring shape to wrap and fix the fluid guide 12 in all directions, further enhancing the connection stability between the fluid guide 12 and the connecting block 13.

[0057] In this way, the annular first sidewall 132 fits tightly against the outer periphery of the fluid guide 12, which can effectively prevent the fluid guide 12 from shaking or shifting when subjected to external force, thus ensuring the reliability of the electrical connection.

[0058] Meanwhile, the annular first sidewall 132 can also provide better sealing performance, preventing dust, moisture and other impurities from entering the connection area between the guide fluid 12 and the connecting block 13, thereby extending the service life of the top cover assembly 1.

[0059] Furthermore, because the annular first sidewall 132 can provide a more stable support surface for welding, the welding material can be evenly distributed between the guide fluid 12 and the connecting block 13, which further enhances the mechanical strength and electrical performance of the weld point and helps to improve the uniformity and firmness of the weld.

[0060] In some embodiments, refer to Figure 3 As shown, the top surface of the first top wall 131 is a flat surface.

[0061] Thus, the flat first top wall 131 facilitates connection with other components such as busbars, ensuring the flatness and tightness of the connection and avoiding problems such as poor contact or installation difficulties caused by uneven surfaces.

[0062] Thus, the flat first top wall 131 can also provide a good reference surface for connection operations such as welding, which helps to improve the accuracy and quality of welding, ensure the uniform distribution and firmness of welding points, and further enhance the reliability and stability of the top cover assembly 1.

[0063] In some embodiments, refer to Figure 5 As shown, a welding groove 134 is provided on the first top wall 131, and the welding groove 134 is welded and fixed to the fluid guide 12.

[0064] Thus, the welding groove 134 provides a clear and reliable connection point for the electrical connection between the fluid guide 12 and the connecting block 13, ensuring stable current transmission between the two.

[0065] Thus, the welding groove 134 can form a thin area on the first top wall 131, making the welding penetration stronger and thus ensuring the welding effect.

[0066] Furthermore, by welding, a strong bond can be achieved between the fluid guide 12 and the connecting block 13, thereby improving the mechanical strength and stability of the overall structure.

[0067] Furthermore, the welding groove 134 makes the welding operation more precise and convenient, effectively avoiding problems such as inaccurate welding position or weak welding.

[0068] In this embodiment, refer to Figure 5 As shown, there are two welding grooves 134, which are spaced apart along the length of the top cover 11 and extend along the width of the top cover 11.

[0069] Understandably, the welding groove 134 can also be designed in different shapes and sizes as needed to adapt to different welding processes and requirements, thereby further improving the reliability and quality of the connection.

[0070] In some embodiments, the ratio of the thickness of the first top wall 131 to the thickness of the fluid guide 12 is greater than or equal to 1:3 and less than or equal to 1:2.

[0071] Specifically, in this embodiment, the ratio of the thickness of the first top wall 131 to the thickness of the fluid guide 12 is 1:2.

[0072] By limiting the parameters mentioned above, the first top wall 131 can provide sufficient mechanical strength and rigidity to protect the fluid guide 12 from damage by external forces, while ensuring the overall structural stability of the connecting block 13.

[0073] On the other hand, the thickness of the first top wall 131 should not be too large, so as to avoid increasing unnecessary weight and material costs, while ensuring the heat conduction efficiency and welding quality during welding.

[0074] Therefore, by controlling the ratio of the thickness of the first top wall 131 to the thickness of the fluid guide 12 within an appropriate range, a lightweight design of the top cover assembly 1 can be achieved, while ensuring its stability and reliability during use.

[0075] In some embodiments, the first top wall 131 and the first side wall 132 are integrally formed.

[0076] In this way, the one-piece structure eliminates the connection gap between the first top wall 131 and the first side wall 132, thereby improving the overall sealing and waterproof performance of the structure, effectively preventing dust, moisture and other impurities from entering the component and extending the service life of the component.

[0077] Secondly, the one-piece molding process reduces the number of parts and assembly steps, lowers production costs and assembly errors, and improves production efficiency and product quality consistency.

[0078] In addition, the one-piece structure enhances the connection strength between the first top wall 131 and the first side wall 132, making the entire assembly more stable when subjected to external forces or vibrations, and less prone to deformation or damage.

[0079] In some embodiments, refer to Figure 6 As shown, the fluid guide 12 includes a main body 121, a second top wall 122, and a second side wall 123. The second side wall 123 is connected between the main body 121 and the second top wall 122. The second side wall 123 passes through the top cover 11, such that the main body 121 and the second top wall 122 are located on the inner surface and the outer surface of the top cover 11, respectively. The main body 121 is used to connect the battery cell. The second top wall 122 is connected to the side of the second side wall 123 away from the top cover 11 for connection with the first top wall 131.

[0080] Thus, the top cover assembly 1 uses an integrally molded connector to replace the traditional terminal post and fluid conductor 12. The connector directly passes through the top cover 11 and connects to the internal tab of the cell, eliminating the traditional welding step between the terminal post and the fluid conductor 12. This avoids increased resistance at the welding point between the terminal post and the fluid conductor 12 and reduces the risk of the terminal post loosening, significantly improving the reliability of the current transmission path. It is especially suitable for battery 2 applications that need to be in complex environments such as long-term vibration.

[0081] It should also be noted that, since the fluid guide 12 has a portion that protrudes from the outer surface of the top cover 11, the fluid guide 12 combines the functions of a traditional electrode post and a fluid guide 12, but its overall height can still be roughly the same as the existing electrode post, so it can be compatible with the other single cell 2, and has high compatibility.

[0082] Meanwhile, the guide fluid 12 is set in the form of a convex hull, so that the welding area between the guide fluid 12 and the connecting block 13 is arranged between the first top wall 131 and the second top wall 122. Therefore, it can be ensured that the welding area between the guide fluid 12 and the connecting block 13 is sufficient, improving the reliability of welding and ensuring the flow capacity of the top cover assembly 1.

[0083] In some embodiments, the bottom side of the first sidewall 132 is spaced apart from the top cover 11 for insulation between the first sidewall 132 and the top cover 11.

[0084] Thus, the spaced arrangement between the bottom side of the first sidewall 132 and the top cover 11 effectively prevents current from being directly conducted from the first sidewall 132 to the top cover 11, avoiding possible short circuits and ensuring the electrical safety and stability of the entire component.

[0085] In some embodiments, refer to Figure 1 , Figure 2 and Figure 7As shown, the top cover assembly 1 also includes a first insulating member 14, which includes a first connecting portion 141, a second connecting portion 142, and a third connecting portion 143. The first connecting portion 141 is disposed on the outer periphery of the first side wall 132 for insulation of the outer periphery of the first side wall 132; the second connecting portion 142 is disposed between the bottom side of the first side wall 132 and the top cover 11 for insulation between the bottom side of the first side wall 132 and the top cover 11; and the third connecting portion 143 is disposed between the outer periphery of the second side wall 123 and the top cover 11 for insulation between the outer periphery of the second side wall 123 and the top cover 11.

[0086] In this way, by setting insulation protection in multiple areas, short circuits between different components are effectively prevented, ensuring the electrical safety of the entire top cover assembly 1.

[0087] Specifically, the first connecting part 141 insulates the outer periphery of the first sidewall 132 to prevent current leakage; the second connecting part 142 provides insulation between the bottom side of the first sidewall 132 and the top cover 11 to prevent current from being directly conducted to the top cover 11; and the third connecting part 143 insulates the outer periphery of the second sidewall 123 and the top cover 11, further enhancing the insulation performance of the entire assembly.

[0088] Therefore, the multi-point insulation design not only improves the reliability of the top cover assembly 1, but also ensures the stable operation of the assembly, and facilitates its use under different environmental conditions, thus enhancing the adaptability and versatility of the top cover assembly 1.

[0089] In some embodiments, refer to Figure 1 , Figure 2 and Figure 4 As shown, the top cover assembly 1 also includes a second insulating member 15, which is disposed between the main body portion 121 and the top cover 11 for insulation between the main body portion 121 and the top cover 11.

[0090] Thus, the second insulating member 15 ensures that no electrical short circuit occurs between the main body 121 and the top cover 11, thereby ensuring the electrical safety and reliability of the entire top cover assembly 1.

[0091] Furthermore, by providing a second insulating element 15 between the main body 121 and the top cover 11, current can be effectively prevented from being directly conducted from the main body 121 to the top cover 11, thus avoiding potential safety hazards caused by short circuits, such as overheating, sparks, or even fires.

[0092] Secondly, referring to Figure 8As shown, an embodiment of the present invention also provides a battery 2, which includes a housing 21, a battery cell and a top cover assembly 1 as described in the previous embodiment. The housing 21 is provided with an installation cavity and an opening communicating with the installation cavity. The battery cell is disposed in the installation cavity, and the top cover assembly 1 is connected to the opening to close the opening.

[0093] The battery 2 has all the beneficial effects of the aforementioned top cover assembly 1:

[0094] In this embodiment of the present invention, the connecting block 13 is disposed on the guide fluid 12 and electrically connected to the guide fluid 12 for connection with the busbar. 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 and preventing the guide fluid 12 and the busbar from separating due to poor welding effect, thus ensuring the connection. Furthermore, the connecting block 13 increases the welding area between the guide fluid 12 and the busbar, thereby increasing the connection area between the guide fluid 12 and the busbar. The larger welding area also enhances the mechanical strength of the overall structure, making the connection between the guide fluid 12 and the busbar more secure when the top cover assembly 1 is subjected to external force or vibration, and less prone to loosening or breakage.

[0095] Thirdly, embodiments of this utility model also provide a battery module, which includes the battery 2 of the aforementioned embodiments.

[0096] This battery module has all the beneficial effects of the aforementioned battery 2:

[0097] In this embodiment of the present invention, the connecting block 13 is disposed on the guide fluid 12 and electrically connected to the guide fluid 12 for connection with the busbar. 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 and preventing the guide fluid 12 and the busbar from separating due to poor welding effect, thus ensuring the connection. Furthermore, the connecting block 13 increases the welding area between the guide fluid 12 and the busbar, thereby increasing the connection area between the guide fluid 12 and the busbar. The larger welding area also enhances the mechanical strength of the overall structure, making the connection between the guide fluid 12 and the busbar more secure when the top cover assembly 1 is subjected to external force or vibration, and less prone to loosening or breakage.

[0098] Fourthly, embodiments of the present invention also provide a battery pack, which includes the battery module of the foregoing embodiments.

[0099] This battery pack has all the beneficial effects of the aforementioned battery module:

[0100] In this embodiment of the present invention, the connecting block 13 is disposed on the guide fluid 12 and electrically connected to the guide fluid 12 for connection with the busbar. 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 and preventing the guide fluid 12 and the busbar from separating due to poor welding effect, thus ensuring the connection. Furthermore, the connecting block 13 increases the welding area between the guide fluid 12 and the busbar, thereby increasing the connection area between the guide fluid 12 and the busbar. The larger welding area also enhances the mechanical strength of the overall structure, making the connection between the guide fluid 12 and the busbar more secure when the top cover assembly 1 is subjected to external force or vibration, and less prone to loosening or breakage.

[0101] Fifthly, embodiments of this utility model also provide an electrical device, which includes the battery 2 of the aforementioned embodiments, the battery module of the aforementioned embodiments, or the battery pack of the aforementioned embodiments.

[0102] The electrical device has all of the aforementioned battery 2, the battery module of the aforementioned embodiment, or the aforementioned battery pack.

[0103] Beneficial effects:

[0104] In this embodiment of the present invention, the connecting block 13 is disposed on the guide fluid 12 and electrically connected to the guide fluid 12 for connection with the busbar. 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 and preventing the guide fluid 12 and the busbar from separating due to poor welding effect, thus ensuring the connection. Furthermore, the connecting block 13 increases the welding area between the guide fluid 12 and the busbar, thereby increasing the connection area between the guide fluid 12 and the busbar. The larger welding area also enhances the mechanical strength of the overall structure, making the connection between the guide fluid 12 and the busbar more secure when the top cover assembly 1 is subjected to external force or vibration, and less prone to loosening or breakage.

[0105] Electrical equipment can include, but is not limited to, vehicles, smart wearable devices, mobile terminals, home appliances, and medical devices; this application does not limit the scope of these categories. Vehicles include, but are not limited to, cars, buses, trains, ships, and aircraft. Smart wearable devices include, but are not limited to, smartwatches, smart bracelets, and neck massagers. Mobile terminals include, but are not limited to, smartphones, laptops, tablets, and POS (point-of-sales) machines. Home appliances include, but are not limited to, televisions, washing machines, air conditioners, rice cookers, smart robot vacuums, and smart lights. Medical devices include, but are not limited to, infrared electronic thermometers, pulse oximeters, and body composition analyzers.

[0106] 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.

[0107] 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.

[0108] The embodiments, implementation methods, and related technical features of this application can be combined and substituted for each other without conflict.

[0109] 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); A fluid guide (12) is provided through the top cover (11), and at least a portion of the fluid guide (12) protrudes from the outer surface of the top cover (11); and, A connecting block (13) is located on one side of the outer surface of the top cover (11). The connecting block (13) covers the fluid guide (12) and is electrically connected to the fluid guide (12). The connecting block (13) is used to connect to the busbar.

2. The roof assembly of claim 1, wherein, The connecting block (13) includes a first top wall (131) and a first side wall (132) that are connected to each other. The first side wall (132) is connected to the side of the first top wall (131) near the top cover (11). A receiving groove (133) is formed between the first top wall (131) and the first side wall (132). The portion of the fluid guide (12) protruding from the outer surface of the top cover (11) is housed within the receiving groove (133).

3. The roof assembly of claim 2, wherein, The first sidewall (132) is arranged in an annular shape and is arranged around the outer periphery of the fluid guide (12).

4. The roof assembly of claim 2, wherein, The top surface of the first top wall (131) is a flat surface.

5. The roof assembly of claim 2, wherein, The first top wall (131) is provided with a welding groove (134), which is welded and fixed to the fluid guide (12).

6. The roof assembly of claim 2, wherein, The ratio of the thickness of the first top wall (131) to the thickness of the fluid guide (12) is greater than or equal to 1:3 and less than or equal to 1:

2.

7. The roof assembly of claim 2, wherein, The first top wall (131) and the first side wall (132) are integrally formed.

8. The roof assembly of claim 2, wherein, The fluid guide (12) includes a main body (121), a second top wall (122), and a second side wall (123). The second side wall (123) is connected between the main body (121) and the second top wall (122). The second side wall (123) passes through the top cover (11), such that the main body (121) and the second top wall (122) are located on the inner surface and the outer surface of the top cover (11), respectively. The main body (121) is used to connect the battery cell. The second top wall (122) is connected to the side of the second side wall (123) away from the top cover (11) for connection with the first top wall (131).

9. The roof assembly of claim 2, wherein, The bottom side of the first sidewall (132) is spaced apart from the top cover (11) for insulation between the first sidewall (132) and the top cover (11).

10. The cap assembly of claim 8, wherein The top cover assembly (1) further includes a first insulating member (14), which includes a first connecting portion (141), a second connecting portion (142), and a third connecting portion (143). The first connecting portion (141) is disposed on the outer periphery of the first side wall (132) for insulation of the outer periphery of the first side wall (132). The second connecting portion (142) is disposed between the bottom side of the first side wall (132) and the top cover (11) for insulation between the bottom side of the first side wall (132) and the top cover (11). The third connecting portion (143) is disposed between the outer periphery of the second side wall (123) and the top cover (11) for insulation between the outer periphery of the second side wall (123) and the top cover (11).

11. The cap assembly of claim 8, wherein The top cover assembly (1) further includes a second insulating member (15), which is disposed between the main body (121) and the top cover (11) for insulation between the main body (121) and the top cover (11).

12. A battery, characterized by The device includes a housing (21), a battery cell, and a top cover assembly (1) as described in any one of claims 1-11. 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.

13. A battery module, characterized by Includes the battery (2) as described in claim 12.

14. A battery pack, characterized by Includes the battery module as described in claim 13.

15. An electrical device, characterized by Includes the battery (2) as described in claim 12, the battery module as described in claim 13, or the battery pack as described in claim 14.

Images