Battery cover plate assembly, battery and electric equipment

Abstract

The utility model discloses a battery cover plate assembly, a battery and electric equipment, the battery cover plate assembly comprises: a cover plate, which is provided with a through liquid injection hole; the current collector is located on one side of the cover plate, the current collector is suitable for being connected with a battery cell, a through hole is formed in the current collector, and the through hole is communicated with the liquid injection hole; wherein the cover plate is provided with a concave structure facing the current collector, the liquid injection hole is formed in the concave structure, and the concave structure is suitable for providing a connecting area for the cover plate and the current collector. According to the battery cover plate assembly provided by the utility model, the liquid injection hole is formed in the concave structure, and the concave structure is suitable for providing a connecting area of the cover plate and the current collector, so that the process steps and the structure of the battery cover plate assembly are simplified, and the size of the battery cover plate assembly is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, and more specifically, to a battery cover assembly, a battery and an electrical device. Background Art

[0002] The batteries of the prior art, especially cylindrical batteries, are relatively large in size and cannot meet the needs of small-volume batteries. For example, the collector plate adopts a bent Z-shaped structure. During assembly, the collector plate needs to be welded to the pole, and then bent into a Z shape before being placed in the shell. Not only is the process complicated, but the battery product is also large in size and high in cost. Utility Model Content

[0003] One purpose of the utility model is to provide a battery cover assembly, which can solve the technical problem of large volume of the battery cover assembly in the prior art.

[0004] Another object of the present utility model is to provide a battery including the battery cover assembly.

[0005] Another object of the present utility model is to provide an electrical device comprising the battery.

[0006] In order to achieve the above objectives, the utility model provides the following technical solutions.

[0007] According to the battery cover plate assembly of the first aspect of the utility model, it includes: a cover plate, a through injection hole is provided on the cover plate; a current collector, the current collector is located on one side of the cover plate, the current collector is suitable for connecting with the battery cell, the current collector is provided with a through through hole, and the through hole is connected with the injection hole; wherein the cover plate has a recessed structure facing the current collector, the injection hole is provided in the recessed structure, and the recessed structure is suitable for providing a connection area between the cover plate and the current collector.

[0008] Optionally, the injection hole is arranged at the center of the recessed structure.

[0009] Optionally, the cover plate has a first surface on one side along its own thickness direction, and a second surface on the other side along its own thickness direction, and the second surface is opposite to the current collector; wherein the recessed structure includes: a first side wall and a second side wall, the minimum inner diameter of the annular wall surface of the first side wall is larger than the maximum inner diameter of the annular wall surface of the second side wall, and the first side wall is connected to the first surface; a bottom wall, the bottom wall is respectively connected to the first side wall and the second side wall, and the bottom wall is suitable for providing a connection area between the cover plate and the current collector; wherein the second side wall encloses at least a portion of the injection hole.

[0010] Optionally, the bottom wall has a plurality of step portions along the axial direction of the liquid injection hole.

[0011] Optionally, the recessed structure has a groove facing the current collector, and the groove is suitable for welding.

[0012] Optionally, the cover plate has a first connection surface on a side facing the current collector, and the current collector has a second connection surface on a side facing the cover plate, and the first connection surface is connected to the second connection surface and is in surface-to-surface contact with each other.

[0013] Optionally, a first protruding boss is provided on the side of the cover plate facing the current collector, and / or a second protruding boss is provided on the side of the current collector facing the cover plate; wherein the first boss has the first connecting surface, and the second boss has the second connecting surface.

[0014] Optionally, the current collector has a first area and a second area, the portion of the current collector corresponding to the first area is suitable for connecting to the battery cell, the portion of the current collector corresponding to the second area is connected to the recessed structure, and the portion of the current collector corresponding to the first area and the portion of the current collector corresponding to the second area are relatively movable.

[0015] Optionally, the current collector includes: a first connection part, the first connection part has the second area; a plurality of second connection parts, the plurality of second connection parts are arranged along the circumference of the first connection part, and one end of each second connection part is connected to the first connection part; a third connection part, the third connection part is arranged around the outer circumference of the plurality of second connection parts, and the third connection part is respectively connected to the other end of each second connection part; a plurality of fourth connection parts, each of the fourth connection parts is located between two adjacent second connection parts, each of the fourth connection parts has the first area, one end of each of the fourth connection parts is connected to the third connection part, and the other end of each of the fourth connection parts is spaced apart and distributed between the first connection part.

[0016] Optionally, the battery cover assembly further includes: a sealing member, wherein the sealing member is inserted into the liquid injection hole.

[0017] Optionally, the battery cover assembly further comprises: a sealing cover, which is connected to the cover and is disposed in the recessed structure; and the sealing cover covers the sealing member in the axial direction along the injection hole.

[0018] Optionally, the battery cover assembly further includes: a sealing cover, the sealing cover is connected to the cover, and the sealing cover is arranged in the recessed structure.

[0019] Optionally, the current collector is an annular member, the inner side of the current collector encloses the through hole, and the inner side of the current collector has a bent portion bent in a direction away from the cover plate.

[0020] The battery according to the embodiment of the second aspect of the utility model includes: a shell, the shell has a storage space, and the shell is provided with an opening connected to the storage space; a battery cell, the battery cell is located in the storage space; a battery cover assembly, the battery cover assembly is arranged in the opening, the battery cover assembly is any of the above-mentioned battery cover assemblies, and the current collector of the battery cover assembly is connected to the battery cell.

[0021] The electrical equipment according to the third aspect of the present invention comprises any one of the above-mentioned batteries.

[0022] According to the embodiment of the utility model, the battery cover plate assembly includes a cover plate and a current collector. The recessed structure can not only provide an area for opening the injection hole, but also provide a connection area between the cover plate and the current collector, which is not only conducive to simplifying the process steps and simplifying the structure of the current collector, but also conducive to reducing the size of the cover plate, thereby realizing the design of a small-volume battery with limited space.

[0023] Other features and advantages of the present invention will become apparent from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the present invention and, together with the description, serve to explain the principles of the present invention.

[0025] Figure 1 A partial exploded view of a battery according to an embodiment of the utility model;

[0026] Figure 2 is a schematic diagram of a current collector according to an embodiment of the utility model;

[0027] Figure 3 is a schematic diagram of a cover plate according to an embodiment of the utility model;

[0028] Figure 4 A partial cross-sectional view of a battery according to an embodiment of the utility model;

[0029] Figure 5 yes Figure 4 Schematic diagram of the A area circled in the middle;

[0030] Figure 6 A partial exploded cross-sectional view of a battery according to an embodiment of the utility model;

[0031] Figure 7 yes Figure 6 Schematic diagram of the B area circled in the middle;

[0032] Figure 8 is a cross-sectional view of a cover plate according to an embodiment of the utility model;

[0033] Fig. 9 is a cross-sectional view of a cover plate according to yet another embodiment of the utility model;

[0034] Fig.10 is a cross-sectional view of a current collector according to an embodiment of the utility model;

[0035] Fig.11 It is a cross-sectional view of a current collector according to yet another embodiment of the present utility model.

[0036] Reference Numbers

[0037] Battery 100;

[0038] Cover plate 10;

[0039] Injection hole 11; first side wall 112; second side wall 113; bottom wall 114; first step portion 1141; second step portion 1142;

[0040] First surface 12; second surface 13; groove 14; first boss 15; first connecting surface 151;

[0041] The current collector 20; the through hole 21; the second boss 22; the second connection surface 221; the hollow area 23; the bending portion 24; the first connection portion 25; the second connection portion 26; the third connection portion 27; and the fourth connection portion 28;

[0042] Sealing member 30; first section 31; second section 32;

[0043] Cap 40;

[0044] Housing 50 ; opening 51 . DETAILED DESCRIPTION

[0045] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that unless otherwise specifically stated, the relative arrangements of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention.

[0046] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the present invention, its application, or uses.

[0047] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered as part of the specification.

[0048] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0049] It should be noted that like reference numerals and letters refer to similar items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0050] The battery cover assembly according to the embodiment of the utility model is described in detail below with reference to the accompanying drawings.

[0051] like Figures 1 to 11 As shown, the battery cover plate assembly according to an embodiment of the present invention includes a cover plate 10 and a current collector 20 .

[0052] Specifically, a through injection hole 11 is provided on the cover plate 10, and the current collector 20 is located on one side of the cover plate 10. The current collector 20 is suitable for connecting with the battery cell, and a through hole 21 is provided on the current collector 20, and the through hole 21 is connected with the injection hole 11. Among them, the cover plate 10 has a concave structure facing the current collector 20, and the injection hole 11 is provided in the concave structure, and the concave structure is suitable for providing a connection area between the cover plate 10 and the current collector 20.

[0053] In other words, the battery cover plate assembly according to the embodiment of the utility model is mainly composed of a cover plate 10 and a current collector 20 , and a liquid injection hole 11 is opened on the cover plate 10 , for example, the liquid injection hole 11 extends along the thickness direction of the cover plate 10 .

[0054] The current collector 20 is located on one side of the cover plate 10, for example, the current collector 20 is located on the lower side of the cover plate 10. A through hole 21 is provided on the current collector 20, and when the cover body 10 and the current collector 20 are assembled together, the injection hole 11 can be connected to the through hole 21.

[0055] Moreover, the cover plate 10 has a recessed structure facing the current collector 20, the injection hole 11 is arranged in the recessed structure, and the recessed structure is suitable for providing a connection area between the cover plate 10 and the current collector 20. That is to say, the recessed structure can not only provide an opening area for the injection hole 11, but also provide a connection area between the cover plate 10 and the current collector 20. For example, the weld is located at the bottom of the recessed structure, and the difficulty of laser penetration welding can be further reduced by setting the position of the penetration welding in the recessed structure. In this embodiment, the recessed structure can integrate the connection area between the cover plate 10 and the current collector 20 and the injection hole 11 in one area, for example, the weld formed by the penetration welding can be integrated with the injection hole 11 in one area, which can not only hide the connection area between the cover plate 10 and the current collector 20, such as hiding the weld formed by the penetration welding, but also improve the integration, improve the utilization rate of the limited area of ​​the cover plate 10, and help reduce the size of the cover plate 10.

[0056] It should be noted that in the prior art, the current collecting plate and the cover body need to be assembled together first, such as riveted together, and then the current collecting plate and the pole ear are welded together, resulting in a more complex structural shape of the current collecting plate, such as a Z shape, and the connection process between the current collecting plate, the pole ear and the cover body is also more complicated.

[0057] Compared with the prior art, in this embodiment, the recessed structure on the cover plate 10 provides a connection area between the cover plate 10 and the current collector 20, which not only enables the connection between the current collector 20 and the cover plate 10, but also helps to simplify the structure of the current collector 20 and reduce the size of the current collector 20.

[0058] In addition, by hiding the connection position between the cover plate 10 and the current collector 20 in the recessed structure, the integration degree can be improved, the utilization rate of the limited area of ​​the cover plate 10 is improved, and the size of the cover plate 10 is reduced.

[0059] Therefore, according to the embodiment of the utility model, the battery cover plate assembly includes a cover plate 10 and a current collector 20. The recessed structure can not only provide an opening area for the injection hole 11, but also provide a connection area between the cover plate 10 and the current collector 20, which is not only conducive to simplifying the process steps and simplifying the structure of the current collector 20, but also conducive to reducing the size of the cover plate 10, thereby realizing the design of a small-volume battery 100 with limited space.

[0060] According to one embodiment of the utility model, Figure 1 As shown, the injection hole 11 is arranged at the center of the concave structure. For example, the outer contour of the concave structure is quasi-circular, and the injection hole 11 is arranged at the center of the concave structure. In this embodiment, by arranging the injection hole 11 at the center of the concave structure, it is not only convenient to open the injection hole 11, but also conducive to the design of the cylindrical battery.

[0061] In addition, it should be noted that if the injection hole 11 adopts an eccentric design, it is not easy to align the injection hole 11 with the injection gun head in a fixed position, and it is difficult to achieve mass production. In comparison, the injection hole 11 of the present embodiment is located at the center of the cover plate 10, which is conducive to achieving a relative fixed position between the injection hole 11 and the injection gun head, facilitating injection, and improving injection efficiency.

[0062] In some specific embodiments of the present invention, Figure 6 As shown, the cover plate 10 has a first surface 12 on one side along the thickness direction thereof, and a second surface 13 on the other side along the thickness direction thereof, and the second surface 13 is opposite to the current collector 20 .

[0063] Specifically, Figure 8 and Fig. 9 As shown, the recessed structure includes: a first side wall 112, a second side wall 113 and a bottom wall 114. The minimum inner diameter of the annular wall surface of the first side wall 112 is greater than the maximum inner diameter of the annular wall surface of the second side wall 113. The first side wall 112 is connected to the first surface 12, and the bottom wall 114 is connected to the first side wall 112 and the second side wall 113 respectively. For example, the first surface 12 can be the lower surface of the cover plate 10, and the second surface 13 can be the upper surface of the cover plate 10. Among them, the inner wall surface of the injection hole 11 includes: a first side wall 112, a second side wall 113 and a bottom wall 114. The first side wall 112 and the second side wall 113 are respectively annular wall surfaces. The minimum inner diameter corresponding to the first side wall 112 is greater than the maximum inner diameter corresponding to the second side wall 113. The first side wall 112 is connected to the first surface 12, and the bottom wall 114 is connected to the first side wall 112 and the second side wall 113 respectively.

[0064] The second side wall 113 encloses at least a portion of the liquid injection hole 11 , so as to facilitate the liquid injection hole 11 to be arranged in the recessed structure.

[0065] In addition, the bottom wall 114 is suitable for providing a connection area between the cover plate 10 and the current collector 20, which can reduce the difficulty of connecting the cover plate 10 and the current collector 20. For example, the weld is located on the bottom wall 114, and the penetration welding position is set on the bottom wall 114, which can further reduce the difficulty of laser penetration welding.

[0066] According to one embodiment of the utility model, Figure 8As shown, the bottom wall 114 has a plurality of steps along the axial direction of the injection hole 11. For example, the bottom wall 114 is provided with a first step 1141 and a second step 1142, the upper surface of the first step 1141 is butted against the lower edge of the first side wall 112, the upper surface of the first step 1141 is suitable for providing a connection area between the cover plate 10 and the current collector 20, and the lower edge of the side surface of the first step 1141 is butted against the upper surface of the second step 1142. In this embodiment, by adopting a plurality of steps, the shape of the cover plate 10 can be controlled, for example, Figure 4 and Figure 7 As shown, the cover plate 10 adopts a step portion so that a part of the cover plate 10 can extend into the through hole 21, thereby improving the bonding firmness between the cover plate 10 and the current collector 20 and limiting the degree of freedom between the cover plate 10 and the current collector 20. In addition, when laser penetration welding is performed on the upper surface of the first step portion 1141, a larger exposed area of ​​the region for laser penetration welding can be achieved, which is convenient for laser penetration welding operation and helps to reduce the difficulty of laser penetration welding.

[0067] In some specific embodiments of the present invention, Figure 8 As shown, the recessed structure has a groove 14 facing the current collector 20, and the groove 14 is suitable for welding. For example, a groove 14 recessed inwardly is provided on the bottom wall 114, and the weld can be located in the groove 14, and penetration welding can be performed at the location of the groove 14.

[0068] In addition, along the thickness direction of the cover plate 10, the groove 14 is recessed toward the inside of the cover plate 10, which not only makes the thickness of the cover plate 10 at the position of the groove 14 thinner, but also reduces the thickness of the welding area on the cover plate 10, which can effectively avoid welding difficulties caused by too thick thickness, such as laser welding difficulties. In other words, by using the groove 14 to reduce the thickness of the local area of ​​the cover plate 10, it is beneficial to the efficiency of penetration welding and optimizes the effect of penetration welding. Moreover, performing penetration welding at the position of the groove 14 is also beneficial to positioning during penetration welding and improves the efficiency of penetration welding.

[0069] According to one embodiment of the utility model, Figure 7 As shown, the side of the cover plate 10 facing the current collector 20 has a first connection surface 151, and the side of the current collector 20 facing the cover plate 10 has a second connection surface 221, and the first connection surface 151 is connected to the second connection surface 221 and is in surface-to-surface contact. For example, the portion of the cover plate 10 corresponding to the weld is in surface-to-surface contact with the current collector 20. In this embodiment, a portion of the lower surface of the cover plate 10 is in surface-to-surface contact with a portion of the upper surface of the current collector 20, which expands the contact area, and a recessed structure can be provided near the contact position, thereby improving the reliability of the connection between the cover plate 10 and the current collector 20.

[0070] In some specific embodiments of the present invention, Figure 7 As shown, a first protruding boss 15 is provided on the side of the cover plate 10 facing the current collector 20 , and / or a second protruding boss 22 is provided on the side of the current collector 20 facing the cover plate 10 ; wherein the first boss 15 has a first connecting surface 151 , and the second boss 22 has a second connecting surface 221 .

[0071] For example, a portion of the cover plate 10 corresponding to the weld bead is provided with a protruding first boss 15, and the first boss 15 extends toward the direction where the current collector 20 is located, and / or a portion of the current collector 20 corresponding to the weld bead is provided with a protruding second boss 22, and the second boss 22 extends toward the direction where the cover plate 10 is located. At this time, the following three situations may be included.

[0072] Case 1

[0073] A first boss 15 protruding downward is provided on the lower surface of the cover plate 10 , and the first boss 15 protrudes from other areas of the lower surface of the cover plate 10 . Also, the upper surface of the current collector 20 does not have a second boss 22 .

[0074] Case 2

[0075] A second boss 22 protruding upward is provided on the upper surface of the current collector 20, and the second boss 22 protrudes from other areas of the upper surface of the current collector 20. In addition, the lower surface of the cover plate 10 does not have a first boss 15.

[0076] Case 3

[0077] A first boss 15 protruding downward is provided on the lower surface of the cover plate 10, and the first boss 15 protrudes from other areas of the lower surface of the cover plate 10. Meanwhile, a second boss 22 protruding upward is provided on the upper surface of the current collector 20, and the second boss 22 protrudes from other areas of the upper surface of the current collector 20.

[0078] In this embodiment, by providing at least one boss on the cover plate 10 and the current collector 20, it is beneficial to locally fit the cover plate 10 and the current collector 20, and to connect the cover plate 10 and the current collector 20, for example, it is beneficial to realize penetration welding of the cover plate 10 and the current collector 20 at the recessed structure.

[0079] Optionally, the cross-section of the first boss 15 and / or the second boss 22 is in the shape of a circle or a square, etc. That is to say, the cross-section of the first boss 15 and / or the second boss 22 is not limited to a square, a circle, etc. It should be noted that the cross-section of the first boss 15 and / or the second boss 22 here refers to the cross-section of the surface perpendicular to the axial direction of the first boss 15 and / or the second boss 22. For example, the first boss 15 and / or the second boss 22 extends in the up-down direction, and at this time, the horizontal cross-section of the first boss 15 and / or the second boss 22 is a circle or a square. Among them, the first boss 15 and / or the second boss 22 with a circular cross-section has the advantages of easy mold forming, while the boss 30 with a square cross-section has the advantages of easy positioning and easy installation.

[0080] Optionally, the channel 21 and the injection hole 11 are coaxially arranged, which is beneficial to shorten the relative position of the channel 21 and the injection hole 11, and is beneficial to further reduce the overall size of the battery cover assembly and save space.

[0081] Alternatively, if Figure 7 As shown, a portion of the cover plate 10 extends into the channel 21, for example, a portion of the lower end of the cover plate 10 extends into the channel 21 of the current collector 20. In this embodiment, by using a portion of the cover plate 10 extending into the channel 21, it is beneficial to position and assemble the cover plate 10 and the current collector 20, facilitate penetration welding, and improve the connection stability between the cover plate 10 and the current collector 20. In addition, it can effectively prevent the injection hole 11 from being affected by the current collector 20.

[0082] According to one embodiment of the utility model, Fig.11 As shown, the current collector 20 is a ring-shaped member, the inner side of the current collector 20 encloses a through hole 21, and the inner side of the current collector 20 has a bent portion 24 bent in a direction away from the cover plate (10). For example, the current collector 20 forms a bent portion 24 bent downward at the outer peripheral area of ​​the lower end of the channel 21; for another example, the current collector 20 forms a bent portion 24 bent downward and outward at the outer peripheral area of ​​the lower end of the channel 21. In this embodiment, by using the bent portion 24, not only can the flatness of the connection area between the current collector 20 and the cover plate 10 be ensured, such as ensuring the flatness of the penetration welding surface of the current collector 20; but also the strength of the connection area can be improved, such as improving the strength of the welding surface.

[0083] According to one embodiment of the present invention, the current collector 20 has a first region and a second region, the portion of the current collector 20 corresponding to the first region is suitable for connecting to the battery cell, the portion of the current collector 20 corresponding to the second region is connected to the recessed structure, and the portion of the current collector 20 corresponding to the first region and the portion of the current collector 20 corresponding to the second region are relatively movable. For example, there is a hollow region 23 between the portion of the current collector 20 corresponding to the first region and the portion of the current collector 20 corresponding to the second region, and the portion of the current collector 20 connected to the battery cell and the portion connected to the cover plate 10 can be separated by the hollow region 23.

[0084] During installation, the upper surface of the first part of the current collector 20 can be penetrated and welded to the cover plate 10, and the lower surface of the second part of the current collector can be connected to the pole ear of the battery cell. The part corresponding to the first area on the current collector 20 and the part corresponding to the second area on the current collector 20 are relatively movable. For example, the first part and the second part of the current collector 20 are separated by a hollow area in the horizontal direction.

[0085] In this embodiment, the portion on the current collector 20 corresponding to the first area and the portion on the current collector 20 corresponding to the second area are relatively movable, so that the area where the current collector 20 is connected to the battery cell and the area where the current collector 20 is connected to the cover plate 10 can be disconnected. When the battery cell vibrates, even if the connection between the battery cell and the current collector 20 is disconnected, it will not affect the connection between the current collector 20 and the cover plate 10, thereby having a buffering effect.

[0086] Alternatively, if Figure 2 As shown, the hollow area 23 is V-shaped, and optionally, the portion of the current collector 20 connected to the battery cell is roughly triangular. In this embodiment, by limiting the hollow area 23 to be V-shaped, it is not only conducive to setting more portions of the current collector 20 connected to the battery cell, improving the stability of the connection between the current collector 20 and the battery cell, but also conducive to not easily affecting the connection between the current collector 20 and the cover plate 10 when the battery cell vibrates, even if the battery cell and the current collector 20 are disconnected.

[0087] Alternatively, if Figure 2 As shown, there are multiple hollow regions 23, each of which corresponds to a portion of the current collector 20 connected to the battery cell, and multiple hollow regions 23 are arranged around at least a portion of the periphery of the injection hole 11. By using multiple hollow regions 23 to be arranged around at least a portion of the periphery of the injection hole 11, it is beneficial to apply the battery cover assembly to the cylindrical battery 100, and the cover 10 and the current collector 20 can be applied to the small space of the cylindrical space, and it is beneficial to further reduce the size of the cylindrical battery 100.

[0088] In some specific embodiments of the present invention, Figure 2 As shown, the current collector 20 includes: a first connection part 25, a plurality of second connection parts 26, a third connection part 27 and a plurality of fourth connection parts 28, the first connection part 25 has a second area, the plurality of second connection parts 26 are arranged along the circumference of the first connection part 25, one end of each second connection part 26 is connected to the first connection part 25, the third connection part 27 is arranged around the outer periphery of the plurality of second connection parts 26, the third connection part 27 is respectively connected to the other end of each second connection part 26, each fourth connection part 28 is located between two adjacent second connection parts 26, each fourth connection part 28 has a first area, one end of each fourth connection part 28 is connected to the third connection part 27, and the other end of each fourth connection part 28 is spaced apart and distributed between the first connection part 25.

[0089] That is to say, in this embodiment, the second connection part 26 can realize the connection between the first connection part 25 and the third connection part 27, the first connection part 25 can be used to connect to the recessed structure of the cover plate 10, and the fourth connection part 28 can be used to connect to the battery cell. Since the first connection part 25 and the fourth connection part 28 are separated, the part corresponding to the first area on the current collector 20 and the part corresponding to the second area on the current collector 20 can be relatively movable, thereby avoiding that when the battery cell vibrates, the connection between the battery cell and the current collector 20 affects the connection between the current collector 20 and the cover plate 10.

[0090] According to one embodiment of the utility model, Figure 1 and Figure 4 As shown, the battery cover assembly further includes: a sealing member 30, which is inserted into the liquid injection hole 11. That is, the sealing member 30 can be used to seal the liquid injection hole 11 after liquid injection to prevent leakage.

[0091] In some specific embodiments of the present invention, Figure 1 and Figure 4 As shown, the battery cover assembly also includes: a cover 40, which is connected to the cover 10 and is arranged in the concave structure; along the axial direction of the injection hole 11, the cover 40 covers the seal 30. In other words, the battery cover assembly also includes: a cover 40, which is connected to the cover 10 and covers the seal 30, and leakage can be prevented by the cover 40. Among them, the seal 30 can be a sealing nail, which can be put into the sealing nail after the injection, and then the cover 40 is sealed.

[0092] According to one embodiment of the utility model, Figure 1 and Figure 4 As shown, the battery cover assembly further includes: a cover 40, the cover 40 is connected to the cover 10, and the cover 40 is arranged in the recessed structure. In this embodiment, the cover 40 can be connected to the cover 10 to achieve a sealing effect.

[0093] Optionally, the sealing cover 40 is welded to the cover plate 10 to improve structural stability and anti-leakage effect.

[0094] Alternatively, if Figure 4 As shown, the sealing member 30 is a T-shaped member, and the sealing member 30 includes a first segment 31 and a second segment 32. For example, the first segment 31 extends in the horizontal direction, and the second segment 32 extends in the vertical direction. The second segment 32 is plugged into the lower part of the injection hole 11, and the first segment 31 overlaps the upper step surface of the second step portion 1142.

[0095] Alternatively, if Figure 4 As shown, the cover 40 overlaps the upper step surface of the first step portion 1141. Optionally, in the up and down direction, the cover 40 is lower than or flush with the upper end surface of the cover plate 10, which is beneficial to the appearance and avoids increasing the overall occupied space due to the provision of the cover 40.

[0096] The utility model further provides a battery 100, which includes: a housing 50, a battery cell and a battery cover assembly.

[0097] Specifically, the shell 50 has a accommodating space, and an opening 51 connected to the accommodating space is provided on the shell 50. The battery cell is located in the accommodating space, and the battery cover assembly is arranged in the opening 51. The battery cover assembly is the battery cover assembly of any of the above embodiments, and the current collector 20 of the battery cover assembly is connected to the battery cell.

[0098] That is, the housing 50 has a storage space, which can be used to accommodate the battery cell, etc. An opening 51 is provided on the housing 50, and the opening 51 is connected to the storage space. A cover plate 10 is provided at the position of the opening 51, and the cover plate 10 can be used to close at least a portion of the opening 51. For example, at least a portion of the housing 50 is located below the cover plate 10, and the current collector 20 is located in the housing 50 and below the cover plate 10.

[0099] When assembling the battery 100, the tabs of the battery cell and the current collector 20 can be welded together to form a small whole, and the small whole is installed in the housing 50. Then, the cover plate 10 is installed at the opening 51, and the cover plate 10 and the current collector 20 are connected by penetration welding. It can be seen that the assembly efficiency of the battery 100 of the embodiment of the utility model is higher.

[0100] It should be noted that the battery cover assembly of the embodiment of the utility model can be used not only at the negative electrode position, but also at the positive electrode position, which is not limited here.

[0101] The utility model also provides an electrical device, which includes the battery 100 of any of the above embodiments. Since the battery 100 of the above embodiments has the advantages of small size and high assembly efficiency, the electrical device of this embodiment also has the same advantages, which will not be elaborated here.

[0102] In summary, according to the battery cover assembly of the embodiment of the utility model, the cover 10 has a recessed structure facing the current collector 20, the injection hole 11 is provided in the recessed structure, and the recessed structure is suitable for providing a connection area between the cover 10 and the current collector 20, for example, by adopting a penetration welding method to achieve the connection between the cover 10 and the current collector 20, and hiding the weld formed by the penetration welding in the recessed structure, it is possible to reduce the space occupied by the cover 10 and the current collector 20, etc., and realize the design of a small-sized battery 100. The battery and electrical equipment of the embodiment of the utility model include the battery cover assembly of any of the above embodiments. Since the battery cover assembly has the advantages of small size, the battery and electrical equipment of the embodiment of the utility model also have the same advantages, which will not be repeated here.

[0103] Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present invention. It should be understood by those skilled in the art that the above embodiments may be modified without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A battery cover assembly, characterized in that: include: A cover plate (10), wherein a through-hole (11) is formed on the cover plate (10); a current collector (20), the current collector (20) being located on one side of the cover plate (10), the current collector (20) being suitable for connecting to the battery core, the current collector (20) being provided with a through hole (21) therethrough, the through hole (21) being in communication with the injection hole (11); The cover plate (10) has a recessed structure facing the current collector (20), the injection hole (11) is provided in the recessed structure, and the recessed structure is suitable for providing a connection area between the cover plate (10) and the current collector (20); The recessed structure has a groove (14) facing the current collector (20), the thickness of the cover plate (10) at the position where the groove (14) is located is relatively thin, and the groove (14) is suitable for welding.

2. The battery cover assembly according to claim 1, characterized in that: The liquid injection hole (11) is arranged at the center of the recessed structure.

3. The battery cover assembly according to claim 1, characterized in that: The cover plate (10) has a first surface (12) on one side along the thickness direction thereof, and a second surface (13) on the other side along the thickness direction thereof, wherein the second surface (13) is opposite to the current collector (20); Wherein, the recessed structure comprises: a first side wall (112) and a second side wall (113), wherein the minimum inner diameter of the annular wall surface of the first side wall (112) is greater than the maximum inner diameter of the annular wall surface of the second side wall (113), and the first side wall (112) is connected to the first surface (12); a bottom wall (114), the bottom wall (114) being connected to the first side wall (112) and the second side wall (113) respectively, and the bottom wall (114) being suitable for providing a connection area between the cover plate (10) and the current collector (20); Wherein, the second side wall (113) encloses at least a portion of the liquid injection hole (11).

4. The battery cover assembly according to claim 3, characterized in that: The bottom wall (114) has a plurality of step portions along the axial direction of the liquid injection hole (11).

5. The battery cover assembly according to claim 1, characterized in that: The cover plate (10) has a first connection surface (151) on the side facing the current collector (20), and the current collector (20) has a second connection surface (221) on the side facing the cover plate (10), and the first connection surface (151) and the second connection surface (221) are connected and in surface-to-surface contact.

6. The battery cover assembly according to claim 5, characterized in that: A protruding first boss (15) is provided on a side of the cover plate (10) facing the current collector (20), and / or a protruding second boss (22) is provided on a side of the current collector (20) facing the cover plate (10); Wherein, the first boss (15) has the first connecting surface (151), and the second boss (22) has the second connecting surface (221).

7. The battery cover assembly according to claim 1, characterized in that: The current collector (20) has a first region and a second region, the portion of the current collector (20) corresponding to the first region is suitable for connecting to the battery core, the portion of the current collector (20) corresponding to the second region is connected to the recessed structure, and the portion of the current collector (20) corresponding to the first region and the portion of the current collector (20) corresponding to the second region are relatively movable.

8. The battery cover assembly according to claim 7, characterized in that: The current collector (20) comprises: A first connecting portion (25), wherein the first connecting portion (25) has the second region; a plurality of second connection parts (26), the plurality of second connection parts (26) being arranged along the circumference of the first connection part (25), and one end of each second connection part (26) being connected to the first connection part (25); A third connecting portion (27), the third connecting portion (27) being arranged around the outer circumference of the plurality of second connecting portions (26), the third connecting portion (27) being respectively connected to the other end of each of the second connecting portions (26); A plurality of fourth connecting parts (28), each of the fourth connecting parts (28) is located between two adjacent second connecting parts (26), each of the fourth connecting parts (28) has the first area, one end of each of the fourth connecting parts (28) is connected to the third connecting part (27), and the other end of each of the fourth connecting parts (28) is spaced apart from the first connecting part (25).

9. The battery cover assembly according to claim 1, characterized in that: Also includes: A sealing member (30), wherein the sealing member (30) is inserted into the liquid injection hole (11).

10. The battery cover assembly according to claim 9, characterized in that: Also includes: A sealing cover (40), the sealing cover (40) being connected to the cover plate (10), and the sealing cover (40) being arranged in the recessed structure; The sealing cover (40) covers the sealing member (30) along the axial direction of the liquid injection hole (11).

11. The battery cover assembly according to claim 1, characterized in that: Also includes: A sealing cover (40), the sealing cover (40) being connected to the cover plate (10), and the sealing cover (40) being arranged in the recessed structure.

12. The battery cover assembly according to claim 1, characterized in that: The current collector (20) is an annular member, the inner side surface of the current collector (20) encloses the through hole (21), and the inner side of the current collector (20) has a bent portion (24) bent in a direction away from the cover plate (10).

13. A battery (100), characterized in that: include: A housing (50), the housing (50) having a receiving space, and the housing (50) being provided with an opening (51) communicating with the receiving space; A battery cell, wherein the battery cell is located in the accommodation space; A battery cover assembly, wherein the battery cover assembly is arranged at the opening (51), and the battery cover assembly is the battery cover assembly according to any one of claims 1 to 12, and the current collector (20) of the battery cover assembly is connected to the battery cell.

14. An electrical device, characterized in that: Comprising the battery (100) as claimed in claim 13.

Images