A top cover assembly, a battery, a battery module, a battery pack, and an electric device

Abstract

This invention provides a top cover assembly, a battery, a battery module, a battery pack, and an electrical device. The top cover assembly includes a first top cover and a fluid guide. At least a portion of the fluid guide passes through the first top cover and includes at least a busbar portion located on the side of the first top cover away from the first battery cell. Along the width direction of the first top cover, the busbar portion extends beyond the first top cover for connection with another battery cell. With the electrical device of this invention, the current of the second battery cell can be directly transferred from the fluid guide to the first battery cell, that is, the current of the second battery cell can be directly transferred to the first battery cell through the fluid guide, reducing the number of intermediate components and thus significantly reducing contact resistance. Furthermore, lower contact resistance means less energy loss during current conduction, thereby improving the charging and discharging efficiency of the battery cell, enabling faster charging and more efficient discharging.

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, a battery module includes a fluid conductor, terminals, connecting tabs, and electrode tabs. The fluid conductor, terminals, connecting tabs, and electrode tabs are connected sequentially. The fluid conductor is welded to the terminals, and the terminals are welded to the connecting tabs. This results in high contact resistance between the fluid conductor and the terminals, and high contact resistance between the terminals and the connecting tabs, leading to low charge / discharge efficiency of the battery module. Utility Model Content

[0003] 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 low charging and discharging efficiency of battery modules in related technologies.

[0004] In a first aspect, embodiments of the present invention provide a top cover assembly, comprising:

[0005] The first top cover; and,

[0006] A fluid guide, at least a portion of which passes through the first top cover, the fluid guide including at least a busbar portion located on the side of the first top cover away from the first battery cell; the busbar portion extends beyond the first top cover along the width direction of the first top cover for connection to another battery cell.

[0007] In one embodiment, the fluid guide further includes a first electrode portion and a first connecting portion, the first electrode portion passing through the first top cover, such that the first connecting portion and the busbar portion are respectively located on both sides of the first top cover, and the first connecting portion is used to connect the first battery cell.

[0008] Secondly, embodiments of the present invention provide a battery comprising:

[0009] A first housing, the first housing having a first receiving cavity and a first opening;

[0010] A second battery cell, wherein the first battery cell is disposed within the first receiving cavity; and

[0011] The first top cover assembly, which is the aforementioned top cover assembly, is connected to the first housing to close the first opening, and one end of the fluid guide is connected to the second battery cell.

[0012] Thirdly, embodiments of this utility model provide a battery module, comprising:

[0013] The first battery cell; and,

[0014] The second battery cell is a battery as described above, and the bus section is connected to the first battery cell.

[0015] In one embodiment, the number of the second battery cell is at least one;

[0016] In the same second battery cell, there are two flow guides, which are arranged at intervals along the length of the first top cover. Along the width of the first top cover, the two busbars extend in opposite directions to connect the first battery cells on both sides respectively.

[0017] In one embodiment, the busbar includes a second connecting portion, a third connecting portion, and a fourth connecting portion connected in sequence. When the guide fluid includes a first electrode portion, the second connecting portion is connected to the first electrode portion. In the height direction of the first housing, the bottom side of the fourth connecting portion is not lower than the top side of the second connecting portion, so as to connect to the second connecting portion of another first battery cell.

[0018] In one embodiment, the number of the first battery cell and the second battery cell is at least two, and the first battery cell and the second battery cell are arranged alternately.

[0019] In one embodiment, the first battery cell includes a second top cover and a connecting piece. The connecting piece includes a second terminal portion, a fifth connecting portion, and a sixth connecting portion. The second terminal portion passes through the second top cover and is connected between the fifth connecting portion and the sixth connecting portion, such that the fifth connecting portion and the sixth connecting portion are located on both sides of the second top cover. The fifth connecting portion is used to connect the second battery cell, and the sixth connecting portion is used to connect the third battery cell.

[0020] In one embodiment, the distance between the bottom side of the fourth connecting portion and the first top cover is equal to the distance between the top side of the fifth connecting portion and the second top cover.

[0021] In one embodiment, the fifth connecting portion extends along the length direction of the second top cover; and / or,

[0022] The sixth connecting portion extends along the length direction of the second top cover.

[0023] In one embodiment, the extending direction of the fourth connecting portion intersects with the extending direction of the fifth connecting portion.

[0024] Fourthly, embodiments of the present invention provide a battery pack, including the battery module as described in the foregoing embodiments.

[0025] Fifthly, embodiments of the present invention provide an electrical device including a battery pack as described in the foregoing embodiments.

[0026] The beneficial effects of the embodiments of this utility model are as follows:

[0027] In this embodiment, since the guide fluid passes through the first top cover and the busbar extends beyond the first top cover, the guide fluid can be directly connected to another battery cell. This allows the current in the battery cell where the top cover assembly is located to be directly transferred from the guide fluid to the other battery cell. In other words, the current can be directly transferred to the other battery cell through the guide fluid, reducing the number of intermediate components and thus significantly reducing the contact resistance.

[0028] Furthermore, lower contact resistance means less energy loss during current conduction, which improves the charging and discharging efficiency of the battery cell containing the top cover assembly, enabling faster charging and more efficient discharging. Attached Figure Description

[0029] 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.

[0030] Figure 1 This is a schematic diagram of the top cover assembly provided in an embodiment of the present invention;

[0031] Figure 2 yes Figure 1 The diagram shows the structure of the fluid guide in the top cover assembly.

[0032] Figure 3 This is a schematic diagram of the battery structure provided in an embodiment of the present invention;

[0033] Figure 4 This is a first structural schematic diagram of the battery module provided in an embodiment of the present invention;

[0034] Figure 5 This is a side view of the first structure of the battery module provided in an embodiment of the present invention;

[0035] Figure 6 It is at Figure 5 A magnified view of a section at point A;

[0036] Figure 7 This is a schematic diagram of the second structure of the battery module provided in an embodiment of this utility model;

[0037] Figure 8 yes Figure 7 A schematic diagram of the structure of the first battery cell in the battery module shown;

[0038] Figure 9 yes Figure 7 The diagram shows the structure of the connecting piece in the first battery cell.

[0039] Figure 10 This is a side view of the second structure of the battery module provided in an embodiment of the present invention;

[0040] Figure 11 It is at Figure 10 A magnified view of section B;

[0041] Figure 12 This is a partial cross-sectional view of the second structure of the battery module provided in an embodiment of this utility model.

[0042] The labels in the diagram are as follows:

[0043] 1. Top cover assembly;

[0044] 11. First top cover;

[0045] 12. Fluid guide; 121. Manifold section; 1211. Second connecting part; 1212. Third connecting part; 1213. Fourth connecting part; 122. First pole section; 123. First connecting part;

[0046] 2. Battery;

[0047] 21. First shell;

[0048] 3. Battery module;

[0049] 31. First battery cell;

[0050] 32. Second battery cell; 321. Second top cover; 322. Connecting piece; 3221. Second terminal post; 3222. Fifth connecting part; 3223. Sixth connecting part. Detailed Implementation

[0051] 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.

[0052] 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.

[0053] 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 that element.

[0054] Reference Figure 1 and Figure 2 As shown, the first aspect of this utility model provides a top cover assembly 1, which includes a first top cover 11 and a fluid guide 12. At least a portion of the fluid guide 12 passes through the first top cover 11. The fluid guide 12 includes at least a busbar portion 121, which is located on the side of the first top cover 11 away from the first battery cell. Along the width direction of the first top cover 11, the busbar portion 121 extends beyond the first top cover 11 for connection with another battery cell 2.

[0055] In this embodiment, since the fluid guide 12 passes through the first top cover 11 and the busbar portion 121 extends beyond the first top cover 11, the fluid guide 12 can be directly connected to another battery cell 2, so that in the battery cell 2 where the top cover assembly 1 is located, the current can be directly transferred from the fluid guide 12 to the other battery cell 2. That is, the current can be directly transferred to the other battery cell 2 through the fluid guide 12, reducing the number of intermediate components, and thus significantly reducing the contact resistance.

[0056] Furthermore, lower contact resistance means less energy loss during current conduction, which improves the charging and discharging efficiency of the battery cell 2 where the top cover assembly 1 is located, enabling faster charging and more efficient discharging.

[0057] In some embodiments, the fluid guide 12 further includes a first electrode portion 122 and a first connecting portion 123. The first electrode portion 122 passes through the first top cover 11, such that the first connecting portion 123 and the bus portion 121 are located on both sides of the first top cover 11, and the first connecting portion 123 is used to connect the first battery cell.

[0058] Thus, in this embodiment, the battery 2 can be connected to another battery cell directly through the fluid guide 12. Compared with the prior art, this reduces the number of connecting parts required between the cells of one battery cell and the cells of another battery cell, thereby significantly reducing contact resistance, reducing energy loss during current transmission, and improving the charging and discharging efficiency of the battery 2.

[0059] Thus, in this embodiment, the production and assembly efficiency of the top cover assembly 1 can be improved by directly reducing the number of parts in the top cover assembly 1.

[0060] It should also be noted that in this embodiment, the fluid guide 12 passes through the first top cover 11 in a bent manner, thereby achieving a quick connection between the fluid guide 12 and the first top cover 11.

[0061] Reference Figure 3 The second aspect of this utility model provides a battery 2, which includes: a first housing 21, a second battery cell and a first top cover assembly 1. The first housing 21 is provided with a first receiving cavity and a first opening; the second battery cell is disposed in the first receiving cavity; and the first top cover assembly 1 is the top cover assembly 1 as in the foregoing embodiment. The first top cover assembly 1 is connected to the first housing 21 to close the first opening, and one end of the fluid guide 12 is connected to the second battery cell.

[0062] The battery 2 has all the beneficial effects of the top cover assembly 1 in the aforementioned embodiments:

[0063] In this embodiment, since the fluid guide 12 passes through the first top cover 11 and the busbar portion 121 extends beyond the first top cover 11, the fluid guide 12 can be directly connected to another battery cell 2, so that in the battery 2, the current can be directly transferred from the fluid guide 12 to the other battery cell 2. That is, the current can be directly transferred to the other battery cell 2 through the fluid guide 12, reducing the number of intermediate components, and thus significantly reducing the contact resistance.

[0064] Furthermore, lower contact resistance means less energy loss during current conduction, thus improving the charge and discharge efficiency of the battery 2, enabling faster charging and more efficient discharging.

[0065] Reference Figure 4 and Figure 7 As shown, the third aspect of this utility model provides a battery module 3, which includes a first battery cell 31 and a second battery cell 32. The second battery cell 32 is the battery 2 in the aforementioned embodiment, and the bus section 121 is connected to the first battery cell 31.

[0066] The battery module 3 has all the beneficial effects of the battery 2 in the aforementioned embodiments:

[0067] In this embodiment, since the guide fluid 12 passes through the first top cover 11 and the busbar portion 121 extends beyond the first top cover 11, the guide fluid 12 can be directly connected to the first battery cell 31. This allows the current of the second battery cell 32 in the battery module 3 to be directly transferred from the guide fluid 12 to the first battery cell 31. In other words, the current of the second battery cell 32 can be directly transferred to the first battery cell 31 through the guide fluid 12, reducing the number of intermediate components and thus significantly reducing the contact resistance.

[0068] Furthermore, lower contact resistance means less energy loss during current conduction, thus improving the charging and discharging efficiency in battery 2, enabling faster charging and more efficient discharging.

[0069] In some embodiments, the number of second battery cells 32 is at least one;

[0070] In the same second battery cell 32, there are two flow guides 12. The two flow guides 12 are arranged at intervals along the length direction of the first top cover 11. Along the width direction of the first top cover 11, the two busbars 121 extend in opposite directions to connect the first battery cells 31 on both sides respectively.

[0071] It should also be noted that, referring to Figure 3 As shown, in this embodiment, when both the first battery cell 31 and the second battery cell 32 adopt the top cover assembly 1 in the aforementioned embodiment, the opposite extension directions of the busbar portion 121 can more reasonably connect multiple battery modules 3, making the connection between the first battery cell 31 and the second battery cell 32 smoother.

[0072] In some embodiments, refer to Figure 2 As shown, the busbar section 121 includes a second connecting section 1211, a third connecting section 1212, and a fourth connecting section 1213 connected in sequence. When the fluid guide 12 includes a first pole post section 122, the second connecting section 1211 is connected to the first pole post section 122. In the height direction of the first housing 21, the bottom side of the fourth connecting section 1213 is not lower than the top side of the second connecting section 1211, so as to connect to the second connecting section 1211 of another first battery cell 31.

[0073] Thus, referring to Figure 4 , Figure 5 and Figure 6As shown, when both the first battery cell 31 and the second battery cell 32 adopt the top cover assembly 1 in the aforementioned embodiment, the fourth connecting part 1213 on the first battery cell 31 can be directly located above the second connecting part 1211 of the second battery cell 32, so as to facilitate the connection between the fourth connecting part 1213 of the first battery cell 31 and the second connecting part 1211 of the second battery cell 32, which is beneficial to improving the assembly efficiency of the battery module 3.

[0074] In some embodiments, the number of first battery cells 31 and second battery cells 32 is at least two, and the first battery cells 31 and second battery cells 32 are arranged alternately.

[0075] Understandably, referring to Figure 4 and Figure 7 As shown, in specific implementation, the first battery cell 31 may have the same or different structure as the second battery cell 32.

[0076] In some embodiments, refer to Figure 8 and Figure 9 As shown, when the structures of the first battery cell 31 and the second battery cell 32 are different, the first battery cell 31 includes a second top cover 321 and a connecting piece 322. The connecting piece 322 includes a second terminal portion 3221, a fifth connecting portion 3222 and a sixth connecting portion 3223. The second terminal portion 3221 passes through the second top cover 321 and is connected between the fifth connecting portion 3222 and the sixth connecting portion 3223, so that the fifth connecting portion 3222 and the sixth connecting portion 3223 are located on both sides of the second top cover 321, the fifth connecting portion 3222 is used to connect the second battery cell 32, and the sixth connecting portion 3223 is used to connect the third battery cell.

[0077] In the first battery cell 31, the connecting piece 322 includes a second terminal post 3221, a fifth connecting part 3222, and a sixth connecting part 3223. This allows the same connecting piece 322 to function as both a terminal post connecting the tabs and a connecting part connecting the second battery cell 32, thereby reducing the number of parts constituting the top cover assembly 1 in the first battery cell 31 and facilitating assembly. Furthermore, the second terminal post 3221 passes through the second top cover 321, so that the fifth connecting part 3222 and the sixth connecting part 3223 are located on both sides of the second top cover 321, thereby enabling quick connection between the connecting piece 322 and the second top cover 321.

[0078] It should also be noted that the connecting piece 322 is connected to the first battery cell 31 by bending, so as to achieve a quick connection between the connecting piece 322 and the second top cover 321.

[0079] In some embodiments, refer to Figure 10 , Figure 11and Figure 12 As shown, the distance between the bottom side of the fourth connecting part 1213 and the first top cover 11 is equal to the distance between the top side of the fifth connecting part 3222 and the second top cover 321.

[0080] Therefore, when the first battery cell 31 and the second battery cell 32 are connected, the bottom side of the fourth connecting part 1213 of the second battery cell 32 can be directly located above the fifth connecting part 3222 of the first battery cell 31, so as to facilitate the connection between the fourth connecting part 1213 of the second battery cell 32 and the fifth connecting part 3222 of the first battery cell 31, which is beneficial to improving the assembly efficiency of the battery module 3.

[0081] In some embodiments, refer to Figure 8 and Figure 9 As shown, the fifth connecting portion 3222 extends along the length direction of the second top cover 321; and / or,

[0082] The sixth connecting part 3223 extends along the length direction of the second top cover 321.

[0083] Thus, the fifth connecting part 3222 extends along the length of the second top cover 321, which on the one hand increases the connection area between the fifth connecting part 3222 and the first battery cell 31, thereby ensuring the connection between the fifth connecting part 3222 and the first battery cell 31; on the other hand, it can increase the external space of the battery 2, thereby increasing the capacity of the battery 2.

[0084] Thus, the sixth connecting part 3223 extends along the length of the second top cover 321, which on the one hand increases the connection area between the fifth connecting part 3222 and the third cell, thereby ensuring the connection between the fifth connecting part 3222 and the third cell; on the other hand, it can increase the internal space of the battery 2, thereby increasing the capacity of the battery 2.

[0085] 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.

[0086] In some embodiments, the extending direction of the fourth connecting portion 1213 intersects the extending direction of the fifth connecting portion 3222.

[0087] Thus, when the structures of the first battery cell 31 and the second battery cell 32 are different, the fourth connecting portion 1213 of the second battery cell 32 is connected to the fifth connecting portion 3222 of the first battery cell 31. By setting the extension direction of the fourth connecting portion 1213 and the extension direction of the fifth connecting portion 3222 to intersect, the connection area between the fourth connecting portion 1213 and the fifth connecting portion 3222 can be increased, thereby ensuring the connection between the fourth connecting portion 1213 and the fifth connecting portion 3222.

[0088] In some embodiments, the side of the second top cover 321 facing away from the third battery cell is spaced apart from the fifth connection portion 3222 to provide insulation between the fifth connection portion 3222 and the second top cover 321; and / or,

[0089] The second top cover 321 is spaced apart from the sixth connection portion 3223 on the side near the third battery cell to provide insulation between the sixth connection portion 3223 and the second top cover 321.

[0090] Thus, by spacing the fifth connecting part 3222 from the second top cover 321, insulation between the fifth connecting part 3222 and the second top cover 321 can be achieved, thereby preventing the second battery cell 32 from being directly connected to the second top cover 321 and preventing short circuit of the battery 2.

[0091] Thus, by spaced apart from the sixth connecting part 3223 and the second top cover 321, insulation between the sixth connecting part 3223 and the second top cover 321 can be achieved, thereby preventing the second battery cell 32 from being directly connected to the second top cover 321 and preventing short circuit of the battery 2.

[0092] It is understandable that, in the specific implementation process, an insulating element may also be provided between the fifth connecting part 3222 and the second top cover 321, and an insulating element may also be provided between the sixth connecting part 3223 and the second top cover 321 to ensure insulation.

[0093] 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.

[0094] In some embodiments, when the side of the second top cover 321 facing away from the third battery cell is spaced apart from the fifth connecting portion 3222, the minimum distance between the fifth connecting portion 3222 and the second top cover 321 is greater than or equal to 0.4 mm and less than or equal to 0.8 mm; and / or,

[0095] When the second top cover 321 is spaced apart from the sixth connecting part 3223 on the side near the third battery cell, the minimum distance between the sixth connecting part 3223 and the second top cover 321 is greater than or equal to 0.4 mm and less than or equal to 0.8 mm.

[0096] In this embodiment, the distance between the fifth connecting part 3222 and the second top cover 321 is 0.6mm.

[0097] However, this design is not limited to this. In other embodiments, the distance between the fifth connecting part 3222 and the second top cover 321 is 0.4mm, 0.5mm, 0.7mm, or 0.8mm.

[0098] Thus, by limiting the distance between the fifth connecting part 3222 and the second top cover 321 within the aforementioned range, it is possible to ensure that the distance between the fifth connecting part 3222 and the second top cover 321 is sufficient to avoid short circuits, while also preventing the distance between the fifth connecting part 3222 and the second top cover 321 from being too large, thereby avoiding occupying too much external space of the battery 2.

[0099] In this embodiment, the distance between the sixth connecting part 3223 and the second top cover 321 is 0.6mm.

[0100] However, this design is not limited to this. In other embodiments, the distance between the sixth connecting part 3223 and the second top cover 321 is 0.4mm, 0.5mm, 0.7mm, or 0.8mm.

[0101] Thus, by limiting the distance between the sixth connecting part 3223 and the second top cover 321 within the aforementioned range, it is possible to ensure that the distance between the sixth connecting part 3223 and the second top cover 321 is sufficient to avoid short circuits, and also to prevent the distance between the sixth connecting part 3223 and the second top cover 321 from being too large, thereby avoiding occupying too much external space of the battery 2.

[0102] The fourth aspect of this utility model provides a battery pack, which includes the battery module 3 as described in the foregoing embodiments.

[0103] This battery pack has all the beneficial effects of battery module 3 in the aforementioned embodiments:

[0104] In this embodiment, since the guide fluid 12 passes through the first top cover 11 and the busbar portion 121 extends beyond the first top cover 11, the guide fluid 12 can be directly connected to the first battery cell 31. This allows the current of the second battery cell 32 in the battery module 3 to be directly transferred from the guide fluid 12 to the first battery cell 31. In other words, the current of the second battery cell 32 can be directly transferred to the first battery cell 31 through the guide fluid 12, reducing the number of intermediate components and thus significantly reducing the contact resistance.

[0105] Furthermore, lower contact resistance means less energy loss during current conduction, which improves the charging and discharging efficiency of the battery cell, enabling faster charging and more efficient discharging.

[0106] The fifth aspect of this utility model provides an electrical device that includes a battery pack as described in the foregoing embodiments.

[0107] This electrical device has all the beneficial effects of the battery pack described in the foregoing embodiments:

[0108] In this embodiment, since the guide fluid 12 passes through the first top cover 11 and the busbar portion 121 extends beyond the first top cover 11, the guide fluid 12 can be directly connected to the first battery cell 31. This allows the current of the second battery cell 32 in the battery module 3 to be directly transferred from the guide fluid 12 to the first battery cell 31. In other words, the current of the second battery cell 32 can be directly transferred to the first battery cell 31 through the guide fluid 12, reducing the number of intermediate components and thus significantly reducing the contact resistance.

[0109] Furthermore, lower contact resistance means less energy loss during current conduction, which improves the charging and discharging efficiency of the battery cell, enabling faster charging and more efficient discharging.

[0110] 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.

[0111] 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.

[0112] 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.

[0113] The embodiments, implementation methods, and related technical features of this application can be combined and substituted for each other without conflict.

[0114] 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: First top cover (11); and, A fluid guide (12), at least a portion of which is disposed through the first top cover (11), the fluid guide (12) including at least a busbar (121) located on the side of the first top cover (11) away from the first cell; the busbar (121) extends beyond the first top cover (11) along the width direction of the first top cover (11) for connection with another battery cell (2).

2. The top cover assembly according to claim 1, characterized in that, The fluid guide (12) further includes a first pole post (122) and a first connecting part (123). The first pole post (122) passes through the first top cover (11) so that the first connecting part (123) and the busbar part (121) are located on both sides of the first top cover (11). The first connecting part (123) is used to connect the first battery cell.

3. A battery, characterized in that, include: A first housing (21) is provided with a first receiving cavity and a first opening; The second battery cell is disposed within the first receiving cavity; as well as, The first top cover assembly (1) is the top cover assembly (1) as described in claim 1 or 2, the first top cover assembly (1) is connected to the first housing (21) to close the first opening, and one end of the fluid guide (12) is connected to the second battery cell.

4. A battery module, characterized in that, include: First battery cell (31); as well as, The second battery cell (32) is the battery (2) as described in claim 3, and the busbar (121) is connected to the first battery cell (31).

5. The battery module according to claim 4, characterized in that, The number of the second battery cell (32) is at least one; In the same second battery cell (32), there are two flow guides (12), which are arranged at intervals along the length of the first top cover (11). Along the width of the first top cover (11), the two busbars (121) extend in opposite directions to connect the first battery cells (31) on both sides respectively.

6. The battery module according to claim 4 or 5, characterized in that, The busbar (121) includes a second connecting part (1211), a third connecting part (1212), and a fourth connecting part (1213) connected in sequence. When the fluid guide (12) includes a first pole post (122), the second connecting part (1211) is connected to the first pole post (122). In the height direction of the first housing (21), the bottom side of the fourth connecting part (1213) is not lower than the top side of the second connecting part (1211) for connecting the second connecting part (1211) of another first battery cell (31).

7. The battery module according to claim 6, characterized in that, The number of the first battery cell (31) and the second battery cell (32) is at least two, and the first battery cell (31) and the second battery cell (32) are arranged alternately.

8. The battery module according to claim 7, characterized in that, The first battery cell (31) includes a second top cover (321) and a connecting piece (322). The connecting piece (322) includes a second terminal post (3221), a fifth connecting part (3222), and a sixth connecting part (3223). The second terminal post (3221) passes through the second top cover (321) and is connected between the fifth connecting part (3222) and the sixth connecting part (3223), such that the fifth connecting part (3222) and the sixth connecting part (3223) are respectively located on both sides of the second top cover (321). The fifth connecting part (3222) is used to connect the second battery cell (32), and the sixth connecting part (3223) is used to connect the third battery cell.

9. The battery module according to claim 8, characterized in that, The distance between the bottom side of the fourth connecting part (1213) and the first top cover (11) is equal to the distance between the top side of the fifth connecting part (3222) and the second top cover (321).

10. The battery module according to claim 8, characterized in that, The fifth connecting portion (3222) extends along the length direction of the second top cover (321); and / or, The sixth connecting part (3223) extends along the length direction of the second top cover (321).

11. The battery module according to claim 8, characterized in that, The extension direction of the fourth connecting part (1213) intersects with the extension direction of the fifth connecting part (3222).

12. A battery pack, characterized in that, Includes the battery module (3) as described in any one of claims 4-11.

13. An electrical appliance, characterized in that, The battery pack as described in claim 12.

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