Embedded cover, cover plate assembly, battery, battery device and electric equipment

Abstract

The utility model discloses an embedded cover, a cover plate assembly, a battery, a battery device and electric equipment, the embedded cover is used for the cover plate assembly of the battery, the battery comprises a shell, the cover plate assembly comprises a cover plate, the cover plate covers one end of the shell, the embedded cover is provided with an accommodating groove, and the accommodating groove accommodates the end part of the shell and at least part of the cover plate; according to the utility model, the deformation of the shell in the battery welding process is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, and in particular to an embedded cover, a cover plate assembly, a battery, a battery device and an electrical equipment. Background Art

[0002] At present, the battery includes a shell, a cover plate and a cell assembly, etc. The shell is provided with a shell cavity, the cell assembly is placed in the shell cavity, and the cover plate is provided with a pole, which is electrically connected to the cell assembly. In the process of completing the above assembly, welding the shell and the cover plate is an important processing operation. In the prior art, when the shell and the cover plate are welded, the shell is greatly deformed during the welding process, resulting in a gap between the shell and the cover plate during the welding process. Utility Model Content

[0003] The utility model aims to provide an embedded cover, a cover plate assembly, a battery, a battery device and an electrical equipment, so as to solve the problem of large shell deformation during battery welding.

[0004] In order to achieve the purpose of the utility model, the utility model provides the following technical solutions:

[0005] In a first aspect, the utility model provides an embedded cover, which is used for a cover assembly of a battery, wherein the battery comprises a shell, the cover assembly comprises a cover, and the cover is arranged on one end of the shell; the embedded cover is provided with a receiving groove, and the receiving groove receives an end of the shell and at least a part of the cover.

[0006] In one embodiment, the embedded cover and the receiving groove are both annular.

[0007] In one embodiment, the embedded cover has a first plate and a second plate connected to each other, the first plate and the second plate are sleeved on at least a portion of the cover plate and one end of the shell, and the first plate is in close contact with the outer surface of the shell.

[0008] In one embodiment, the first board includes a first sub-board and a second sub-board connected to each other, one end of the first sub-board is connected to the second board, and the other end is connected to the second sub-board, the second sub-board is tightly attached to at least part of the shell, and the first sub-board is opposite to at least part of the cover plate.

[0009] In one embodiment, the first sub-plate is in close contact with at least a portion of the cover plate.

[0010] In one implementation, the first sub-board is flush with the second sub-board.

[0011] In one embodiment, the distance between the end surface of the second sub-board away from the first sub-board and the connection between the first sub-board and the second sub-board is A1, the second board includes a first surface and a second surface opposite to each other, the first surface faces the accommodating groove, and the distance between the end surface of the second sub-board away from the first sub-board and the second surface is A2, satisfying: A2 / A1≥2.

[0012] In one embodiment, the embedded cover further has a third plate, the third plate is arranged opposite to the first plate, the third plate is connected to an end of the second plate away from the first plate, and the third plate is in close contact with the cover plate.

[0013] In one embodiment, the embedded cover further includes a solder, and the solder is received in the receiving groove, one end of the solder is in close contact with the inner wall surface of the second plate, and the other end is in contact with the cover plate.

[0014] In a second aspect, the utility model further provides a cover plate assembly, comprising a cover plate and an embedded cover as described in any one of the various embodiments of the first aspect, wherein the cover plate is connected to the embedded cover.

[0015] In one embodiment, the cover plate includes a main body and a connecting portion connected to each other, the connecting portion is arranged on the four edges of the main body, the main body includes a first surface and a second surface opposite to each other, the second surface is suitable for facing the battery cell assembly, the connecting portion protrudes from the first surface, and at least a portion of the connecting portion extends into the accommodating groove and abuts against the embedded cover and the shell.

[0016] In one embodiment, the connecting portion includes a first side surface and a second side surface, the first side surface and the second side surface are opposite to each other along a first direction, at least a portion of the first side surface is in close contact with the third plate of the embedded cover, and at least a portion of the second side surface is in close contact with the shell.

[0017] In one embodiment, the connecting portion further includes a third side surface, the third side surface is disposed on a side of the second side surface away from the first side surface, and the third side surface is in close contact with the first sub-board of the embedded cover.

[0018] In one embodiment, the connecting portion also includes a first end face and a second end face, the first end face and the second end face are opposite to each other along a second direction, the first end face and the second end face are connected at two opposite ends of the third side face, the second end face is connected to the second side face, the first end face is tightly attached to the first surface of the embedded cover, the second end face is tightly attached to the shell, and the second direction has an angle with the first direction.

[0019] In one embodiment, a connection angle B is formed between the second end face and the second side face, and satisfies: 60°≤B≤120°.

[0020] In a third aspect, the utility model further provides a battery, comprising a shell, a battery cell assembly and a cover assembly as described in any one of the various embodiments of the second aspect, wherein the shell encloses a receiving cavity, the battery cell assembly is received in the receiving cavity, and the shell is connected to the cover assembly.

[0021] In one embodiment, the shell includes a first inner wall surface, a connecting surface and an outer surface, the first inner wall surface and the outer surface are opposite to each other, the connecting surface connects the first inner wall surface and the outer surface, at least a portion of the outer surface is in close contact with the first plate of the embedded cover, at least a portion of the first inner wall surface is in close contact with the second side surface of the cover plate, and the connecting surface is in close contact with the second end surface of the cover plate.

[0022] In one embodiment, the battery further includes a first pole and a second pole arranged at intervals, the first pole and the second pole are arranged at at least one end of the shell, the first pole and the second pole are both matched with the cover plate assembly, and the first pole and the second pole are both electrically connected to the battery cell assembly.

[0023] In a fourth aspect, the present invention further provides a battery device, comprising a battery as described in any one of the various embodiments of the third aspect.

[0024] In a fifth aspect, the utility model further provides an electrical device, comprising a battery device as described in any one of the various embodiments of the fourth aspect.

[0025] By setting an embedded cover, the embedded cover is used for the cover plate assembly of the battery, the battery includes a shell, the cover plate assembly includes a cover plate, and the cover plate is covered on one end of the shell; the embedded cover is provided with a receiving groove, the receiving groove accommodates the end of the shell and at least a part of the cover plate, during the welding process, the embedded cover has a clamping effect on the shell and the cover plate, thereby reducing the deformation of the shell during the battery welding process. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 is a schematic diagram of the appearance of a battery according to an embodiment;

[0028] Figure 2 is an exploded structural diagram of a battery of an embodiment;

[0029] Figure 3is a cross-sectional view of a battery of an embodiment;

[0030] Figure 4 is a first schematic diagram of a local structure of a connection of a battery according to an embodiment;

[0031] Figure 5 It is a second schematic diagram of the local structure of the connection of a battery according to an embodiment.

[0032] Description of reference numerals:

[0033] 10-embedded cover, 101-third plate, 102-second plate, 103-first plate, 11-accommodating groove, 12-assembly port, 20-shell, 21-accommodating cavity, 22-first inner wall surface, 23-connecting surface, 24-outer surface, 30-cover assembly, 31-cover, 311-main body, 3111-first surface, 3112-second surface, 312-connecting portion, 3121-first side surface, 3122-second side surface, 3123-first end surface, 3124-second end surface, 3125-third side surface, 40-first pole, 41-second pole, 50-solder, A1-the distance between the end surface of the second sub-plate away from the first sub-plate and the connection between the first sub-plate and the second sub-plate, A2-the distance between the end surface of the second sub-plate away from the first sub-plate and the second surface, B-connection angle, X-first direction, Y-second direction, 60-local structure of the connection. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0035] It should be noted that when a component is said to be "fixed to" another component, it can be directly on the other component or there can be a central component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there can be a central component at the same time.

[0036] Unless otherwise defined, all technical and scientific terms used in this utility model have the same meaning as those commonly understood by technicians in the technical field of this utility model. The terms used in the specification of this utility model are only for the purpose of describing specific embodiments and are not intended to limit this utility model. The term "and / or" used in this utility model includes any and all combinations of one or more related listed items.

[0037] In conjunction with the accompanying drawings, some embodiments of the present invention are described in detail below. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0038] At present, the battery includes a shell 20, a cover plate 31, and a cell assembly, etc. The shell 20 is provided with a shell cavity, the cell assembly is placed in the shell cavity, and the cover plate 31 is provided with a pole, and the pole is electrically connected to the cell assembly. In the process of completing the above assembly, welding the shell 20 and the cover plate 31 is an important processing operation. In the prior art, when the shell 20 and the cover plate 31 are welded, the shell 20 will be greatly deformed during the welding process, resulting in a gap between the shell 20 and the cover plate 31 during the welding process.

[0039] In view of the above problems, the present invention provides a battery. Figure 1 , Figure 2 and Figure 3 , including a shell 20, a battery cell assembly and a cover assembly 30, the shell 20 encloses a receiving cavity 21, the battery cell assembly is received in the receiving cavity 21, and the shell 20 is connected to the cover assembly 30.

[0040] Optionally, the shell 20 is made of aluminum or steel. Optionally, the assembly gap between the shell 20 and the cover plate 31 in the prior art is large, the base material melts and compensates for many welds during laser welding, the welding residual stress is large, the risk of delayed cracks is large, and the risk of battery welding failure is high. However, in the present utility model, when the battery is welded, the melted embedded cover 10 can be used to compensate for the larger weld gap, the welding residual stress is small, the risk of delayed cracks is small, and the failure risk of battery welding is reduced.

[0041] In one embodiment, please refer to Figure 1 , Figure 2 , Figure 3 and Figure 4 The shell 20 includes a first inner wall surface 22, a connecting surface 23 and an outer surface 24. The first inner wall surface 22 and the outer surface 24 are opposite to each other. The connecting surface 23 connects the first inner wall surface 22 and the outer surface 24. At least a portion of the outer surface 24 is in close contact with the first plate 103 of the embedded cover 10, at least a portion of the first inner wall surface 22 is in close contact with the second side surface 3122 of the cover plate 31, and the connecting surface 23 is in close contact with the second end surface 3124 of the cover plate 31.

[0042] Optionally, the first inner wall surface 22 and the connection surface 23 may be connected by welding. Optionally, the outer surface 24 and the connection surface 23 may be connected by welding.

[0043] Optionally, the thickness of the housing 20 is less than or equal to 0.15 mm. Optionally, the thickness of the housing 20 may be, but is not limited to, 0.12 mm, 0.13 mm, 0.15 mm, etc. Optionally, the housing 20 is made of aluminum or steel.

[0044] Optionally, the first inner wall surface 22, the connecting surface 23 and the outer surface 24 are polished. The polishing method may be fluid polishing, mechanical polishing, ultrasonic polishing, chemical polishing and electrolytic polishing, etc. The first inner wall surface 22, the connecting surface 23 and the outer surface 24 are polished to improve the smoothness of the first inner wall surface 22, the connecting surface 23 and the outer surface 24 and avoid scratching other parts.

[0045] Specifically, when the shell 20 and the cover plate 31 are welded, the embedded cover 10 can clamp the shell 20 and the cover plate 31 to a certain extent, thereby reducing material deformation during the welding process.

[0046] In one embodiment, please refer to Figure 1 , Figure 2 , Figure 3 and Figure 4 The battery also includes a first pole 40 and a second pole 41 that are spaced apart. The first pole 40 and the second pole 41 are disposed at at least one end of the shell 20. The first pole 40 and the second pole 41 are both matched with the cover plate assembly 30, and the first pole 40 and the second pole 41 are both electrically connected to the battery cell assembly.

[0047] Optionally, the first pole 40 and the second pole 41 are both electrically connected to the battery cell assembly to allow currents of opposite polarities to flow.

[0048] Optionally, the first pole 40 is a positive pole, and the material is aluminum. Optionally, the second pole 41 is a negative pole, and the material is copper.

[0049] Optionally, the cross-section of the first pole 40 may be in the shape of a polygon, an ellipse, an irregular shape, etc. Optionally, the cross-section of the first pole 40 may be in the shape of, but not limited to, a quadrilateral, a pentagon, a hexagon, an octagon, an ellipse, an irregular shape, etc. Optionally, the cross-section of the second pole 41 may be in the shape of, but not limited to, a quadrilateral, a pentagon, a hexagon, an octagon, an ellipse, an irregular shape, etc. Optionally, the cross-section of the second pole 41 may be in the shape of, but not limited to, a quadrilateral, a pentagon, a hexagon, an octagon, an ellipse, an irregular shape, etc.

[0050] Optionally, the cover plate 31 includes a first sub-cover and a second sub-cover, the first sub-cover is provided with a through hole for the first pole 40, the second sub-cover is provided with a through hole for the second pole 41, the first pole 40 hole is provided with the first pole 40, and the second pole 41 hole is provided with the second pole 41. Optionally, the first sub-cover is further provided with a liquid injection hole, the liquid injection hole is used for liquid injection, and the liquid injection hole is spaced apart from the first pole 40 hole.

[0051] The present utility model also provides an embedded cover 10, please refer to Figure 1 , Figure 2 , Figure 3 and Figure 4 The embedded cover 10 is used for the cover assembly 30 of the battery. The battery includes a shell 20. The cover assembly 30 includes a cover 31. The cover 31 is covered on one end of the shell 20. The embedded cover 10 is provided with a receiving groove 11. The receiving groove 11 accommodates the end of the shell 20 and at least a part of the cover 31.

[0052] By setting an embedded cover 10, the embedded cover 10 is used for the cover plate assembly 30 of the battery, the battery includes a shell 20, the cover plate assembly 30 includes a cover plate 31, and the cover plate 31 is covered on one end of the shell 20; the embedded cover 10 is provided with a receiving groove 11, the receiving groove 11 accommodates the end of the shell 20 and at least a part of the cover plate 31, during the welding process, the embedded cover 10 has a clamping effect on the shell 20 and the cover plate 31, thereby reducing the deformation of the shell 20 during the battery welding process.

[0053] In one embodiment, please refer to Figure 1 , Figure 2 and Figure 3 The embedded cover 10 and the receiving groove 11 are both annular.

[0054] Optionally, the above arrangement improves the structure of the embedded cover 10 and enhances the degree of fit between the embedded cover 10 and the shell 20 .

[0055] Optional, please refer to Figure 1 , Figure 2 and Figure 3 The embedded cover 10 has an assembly opening 12 connected to the receiving groove 11 , the assembly opening 12 faces the housing 20 , and at least part of the housing 20 and at least part of the cover plate 31 enter or escape from the receiving groove 11 through the assembly opening 12 .

[0056] Optionally, at least part of the shell 20 and at least part of the cover plate 31 are in close contact with the inner wall surface of the receiving groove 11. Optionally, the existing welding structure will produce very large welding deformation during welding because the shell 20 of the battery is very thin, which cannot be completely avoided by only clamps, and the welding yield is extremely difficult to achieve industrialization. However, in the present use novel, when welding the welds of the shell 20 and the cover plate 31, the embedded cover 10 can be used as a filler metal to fill the welding gap caused by welding deformation. Since the embedded cover 10 is an additional part, its volume after melting is much larger than the gap caused by the deformation of the shell 20, and the embedded cover 10 has a certain clamping and restraining effect, which is conducive to reducing welding deformation, reducing the welding gap, and improving the laser welding yield of thin shells.

[0057] Specifically, the structure of the opening of the shell 20 is changed from two parts to three parts through the nesting principle of the embedded cover 10, thereby improving the compatibility with welding deformation. The original size of the structural parts is difficult to assemble in a small gap. After adding the embedded cover 10, due to the presence of the embedded cover 10, a larger welding gap can be compatible, the assembly quality is improved, and the feasibility of welding a thinner shell 20 structure is improved.

[0058] In one embodiment, please refer to Figure 1 , Figure 2 , Figure 3 and Figure 4 The embedded cover 10 has a first plate 103 and a second plate 102 connected to each other. The first plate 103 and the second plate 102 are sleeved on at least part of the cover plate 31 and one end of the shell 20 , and the first plate 103 is in close contact with the outer surface of the shell 20 .

[0059] Optionally, the second plate 102 and the first plate 103 are an integrally formed structure. Optionally, the second plate 102 and the first plate 103 are manufactured separately and then connected to each other. Optionally, the connection between the first plate 103 and the second plate 102 may be, but is not limited to, a clamping connection, a riveting connection, a welding connection, etc. Optionally, the connection between the first plate 103 and the second plate 102 is a welding connection, and the specific welding method between the first plate 103 and the second plate 102 is brazing.

[0060] Specifically, the second plate 102 and the first plate 103 improve the structure of the embedded cover 10 and enhance the clamping capability of the cover plate 31 and the housing 20 .

[0061] In one embodiment, please refer to Figure 1 , Figure 2 , Figure 3 and Figure 4 The first board 103 includes a first sub-board and a second sub-board connected to each other. One end of the first sub-board is connected to the second board 102, and the other end is connected to the second sub-board. The second sub-board is tightly attached to at least part of the shell 20, and the first sub-board is opposite to at least part of the cover plate 31.

[0062] In one embodiment, please refer to Figure 1 , the first sub-plate is in close contact with at least a portion of the cover plate 31 .

[0063] Optionally, the cross-section of the first sub-plate may be in a polygonal, elliptical, irregular, etc. Optionally, the cross-section of the first sub-plate may be in a quadrilateral, pentagon, hexagon, octagon, elliptical, irregular, etc. but is not limited thereto.

[0064] Specifically, the above arrangement enables the first sub-plate to be tightly connected to the cover plate 31 .

[0065] In one embodiment, please refer to Figure 1, the first sub-board is flush with the second sub-board.

[0066] Optionally, the cross-section of the second sub-plate may be in a polygonal, elliptical, irregular, etc. Optionally, the cross-section of the second sub-plate may be in a quadrilateral, pentagon, hexagon, octagon, elliptical, irregular, etc. but is not limited thereto.

[0067] Specifically, the above arrangement enables the embedded cover to be tightly connected to the cover plate and the housing.

[0068] In one embodiment, please refer to Figure 1 , Figure 2 , Figure 3 and Figure 4 The distance between the end face of the second sub-board away from the first sub-board and the connection between the first sub-board and the second sub-board is A1, the second board 102 includes a first surface and a second surface opposite to each other, the first surface faces the accommodating groove 11, and the distance between the end face of the second sub-board away from the first sub-board and the second surface is A2, satisfying: A2 / A1≥2.

[0069] Optionally, A2 / A1 can be, but is not limited to, 2, 3, 5, and 6.

[0070] Specifically, the above arrangement improves the clamping ability of the embedded cover 10 on the housing 20 .

[0071] In one embodiment, please refer to Figure 1 , Figure 2 , Figure 3 and Figure 4 The embedded cover 10 further includes a third plate 101 , which is disposed opposite to the first plate 103 , and is connected to an end of the second plate 102 away from the first plate 103 , and the third plate 101 is in close contact with the cover plate 31 .

[0072] In one embodiment, please refer to Figure 5 The embedded cover 10 further includes a solder 50 , which is received in the receiving groove 11 , one end of the solder 50 is in close contact with the inner wall surface of the second plate 102 , and the other end thereof is in contact with the cover plate 31 .

[0073] Optionally, in the local structure 60 of the connection, brazing filler metal 50 is added to change the welding method to induction brazing or other welding methods, which has a high practical value for the assembly of ultra-thin steel shells.

[0074] The present invention also provides a cover plate assembly 30, please refer to Figure 1 and Figure 2 , including a cover plate 31 and the embedded cover 10 as mentioned above, and the cover plate 31 is connected to the embedded cover 10.

[0075] Optionally, the structure in the prior art has high welding difficulty, high assembly control requirements, high processing accuracy of the cover plate 31, and high manufacturing difficulty and cost. In the utility model, since it can accommodate larger welding deformation and the resulting welding gap, the processing accuracy of the battery welding tooling can be reduced, thereby reducing the manufacturing difficulty and cost.

[0076] In one embodiment, please refer to Figure 1 , Figure 2 , Figure 3 and Figure 4 The cover plate 31 includes a main body 311 and a connecting portion 312 connected to each other. The connecting portion 312 is arranged on the four edges of the main body 311. The main body 311 includes a first surface 3111 and a second surface 3112 opposite to each other. The second surface 3112 is suitable for facing the battery cell assembly. The connecting portion 312 protrudes from the first surface 3111, and at least a portion of the connecting portion 312 extends into the accommodating groove 11 and abuts against the embedded cover 10 and the shell 20.

[0077] Optionally, the shape of the first surface 3111 may be a polygon, an ellipse, an irregular shape, etc. Optionally, the shape of the first surface 3111 may be, but not limited to, a quadrilateral, a pentagon, a hexagon, an octagon, an ellipse, an irregular shape, etc. Optionally, the shape of the second surface 3112 may be, but not limited to, a quadrilateral, a pentagon, a hexagon, an octagon, an ellipse, an irregular shape, etc. Optionally, the shape of the second surface 3112 may be, but not limited to, a quadrilateral, a pentagon, a hexagon, an octagon, an ellipse, an irregular shape, etc.

[0078] Optionally, the connection between the body 311 and the connection part 312 may be, but is not limited to, clamping, riveting, welding, etc. Optionally, the connection between the body 311 and the connection part 312 is welding, and the specific welding between the body 311 and the connection part 312 is brazing.

[0079] Optionally, the first surface 3111 and the second surface 3112 are polished, and the polishing method may be fluid polishing, mechanical polishing, ultrasonic polishing, chemical polishing, electrolytic polishing, etc. Polishing the first surface 3111 and the second surface 3112 improves the smoothness of the first surface 3111 and the second surface 3112 and avoids scratching other parts.

[0080] Optionally, the cover plate 31 is made of steel or aluminum. Optionally, the embedded cover 10 is made of steel or aluminum.

[0081] Specifically, the arrangement of the body 311 and the connecting portion 312 improves the structure of the cover plate 31 , so that the cover plate 31 and the embedded cover 10 are compactly connected.

[0082] In one embodiment, please refer to Figure 1 , Figure 2 , Figure 3 and Figure 4 The connecting portion 312 includes a first side surface 3121 and a second side surface 3122, which are arranged opposite to each other along the first direction X, at least a portion of the first side surface 3121 is in close contact with the third plate 101 of the embedded cover 10, and at least a portion of the second side surface 3122 is in close contact with the shell.

[0083] Optionally, at least a portion of the second side surface 3122 is in close contact with the first inner wall surface 22 of the shell 20 .

[0084] Optionally, the shape of the first side surface 3121 may be a polygon, an ellipse, an irregular shape, etc. Optionally, the shape of the first side surface 3121 may be, but not limited to, a quadrilateral, a pentagon, a hexagon, an octagon, an ellipse, an irregular shape, etc. Optionally, the shape of the second side surface 3122 may be, but not limited to, a quadrilateral, a pentagon, a hexagon, an octagon, an ellipse, an irregular shape, etc. Optionally, the shape of the second side surface 3122 may be, but not limited to, a quadrilateral, a pentagon, a hexagon, an octagon, an ellipse, an irregular shape, etc.

[0085] Optionally, the first side surface 3121 and the second side surface 3122 are polished. The polishing method may be fluid polishing, mechanical polishing, ultrasonic polishing, chemical polishing, electrolytic polishing, etc. Polishing the first side surface 3121 and the second side surface 3122 improves the smoothness of the first side surface 3121 and the second side surface 3122 and avoids scratching other parts.

[0086] Specifically, the arrangement of the first side surface 3121 and the second side surface 3122 improves the structure of the connecting portion 312 , so that the connecting portion 312 is tightly connected to the embedded cover 10 .

[0087] In one embodiment, please refer to Figure 1 , Figure 2 , Figure 3 and Figure 4 The connecting portion 312 further includes a third side surface 3125 , which is disposed on a side of the second side surface 3122 away from the first side surface 3121 , and the third side surface 3125 is in close contact with the first sub-board of the embedded cover 10 .

[0088] Optionally, the shape of the third side surface 3125 may be a polygon, an ellipse, an irregular shape, etc. Optionally, the shape of the third side surface 3125 may specifically be, but not limited to, a quadrilateral, a pentagon, a hexagon, an octagon, an ellipse, an irregular shape, etc.

[0089] Specifically, the above arrangement enables the connection portion 312 to be tightly connected to the embedded cover 10 .

[0090] In one embodiment, please refer to Figure 1 , Figure 2 , Figure 3 and Figure 4 The connecting portion 312 also includes a first end face 3123 and a second end face 3124, the first end face 3123 and the second end face 3124 are arranged opposite to each other along the second direction Y, the first end face 3123 and the second end face 3124 are connected at two opposite ends of the third side face 3125, the second end face 3124 is connected to the second side face 3122, the first end face 3123 is tightly attached to the first surface of the embedded cover 10, the second end face 3124 is tightly attached to the shell body 20, and the second direction Y and the first direction X have an angle.

[0091] Optionally, the second end face 3124 abuts against the connection face 23 of the housing 20. Optionally, the shape of the first end face 3123 may be a polygon, an ellipse, an irregular shape, etc. Optionally, the shape of the first end face 3123 may be, but not limited to, a quadrilateral, a pentagon, a hexagon, an octagon, an ellipse, an irregular shape, etc. Optionally, the shape of the second end face 3124 may be, but not limited to, a quadrilateral, a pentagon, a hexagon, an octagon, an ellipse, an irregular shape, etc. Optionally, the shape of the second end face 3124 may be, but not limited to, a quadrilateral, a pentagon, a hexagon, an octagon, an ellipse, an irregular shape, etc.

[0092] Optionally, the first end face 3123 and the second end face 3124 are polished, and the polishing method may be fluid polishing, mechanical polishing, ultrasonic polishing, chemical polishing, electrolytic polishing, etc. Polishing the first end face 3123 and the second end face 3124 improves the smoothness of the first end face 3123 and the second end face 3124 and avoids scratching other parts.

[0093] Specifically, the arrangement of the first end surface 3123 and the second end surface 3124 improves the structure of the connecting portion 312 , so that the connecting portion 312 is tightly connected to the embedded cover 10 and the housing 20 .

[0094] In one embodiment, please refer to Figure 1 , Figure 2 , Figure 3 and Figure 4 There is a connection angle B between the second end surface 3124 and the second side surface 3122, which satisfies: 60°≤B≤120°.

[0095] Optionally, B can be, but is not limited to, 60°, 80°, 100°, and 120°.

[0096] Specifically, the above configuration improves the flexibility of configuring the second end surface 3124 and the second side surface 3122 .

[0097] Optional, please refer to Figure 1 , Figure 2 , Figure 3 and Figure 4The assembly and welding of the battery is divided into the following three steps: the first step is to make the first sub-cover, the second sub-cover, the two embedded covers 10 and the shell 20; the second step is to perform the shell work and assemble the first sub-cover, the second sub-cover, the two embedded covers 10 and the shell 20; the third step is to weld the shell 20 and the cover plate 31 of the battery after the shell 20, the first sub-cover, the second sub-cover and the two embedded covers 10 are assembled accordingly. The welding method can be selected from the side welding form or the top welding form. The embodiment of the utility model also provides a battery device, including the battery as described above.

[0098] The embodiment of the utility model further provides an electrical device, comprising the battery device as described above.

[0099] In the description of the embodiments of the present invention, it should be noted that the orientation or positional relationship of terms such as "center", "up", "down", "left", "right", "vertical", "horizontal", "inside" and "outside" are based on the orientation or positional relationship of the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0100] The above disclosure is only a preferred embodiment of the present invention, and certainly cannot be used to limit the scope of rights of the present invention. Ordinary technicians in this field can understand that all or part of the processes of the above embodiment and equivalent changes made according to the present invention still fall within the scope covered by the present invention.

Claims

1. An embedded cover, characterized in that: The embedded cover is used for a cover plate assembly of a battery, the battery comprises a shell, the cover plate assembly comprises a cover plate, and the cover plate is covered on one end of the shell; The embedded cover is provided with a receiving groove, and the receiving groove receives the end of the shell and at least a part of the cover plate.

2. The cover according to claim 1, characterized in that: The embedded cover and the containing groove are both annular.

3. The cover according to claim 1, characterized in that: The embedded cover comprises a first plate and a second plate connected to each other. The first plate and the second plate are sleeved on at least a portion of the cover plate and one end of the shell. The first plate is in close contact with the outer surface of the shell.

4. The cover according to claim 3, characterized in that: The first board includes a first sub-board and a second sub-board connected to each other, one end of the first sub-board is connected to the second board, and the other end is connected to the second sub-board, the second sub-board is tightly attached to at least part of the shell, and the first sub-board is opposite to at least part of the cover plate.

5. The cover according to claim 4, characterized in that: The first sub-plate is in close contact with at least a portion of the cover plate.

6. The embedded cover according to claim 4, characterized in that: The first sub-board is flush with the second sub-board.

7. The cover according to claim 4, characterized in that: The distance between the end surface of the second sub-board away from the first sub-board and the connection between the first sub-board and the second sub-board is A1, the second board includes a first surface and a second surface opposite to each other, the first surface faces the accommodating groove, and the distance between the end surface of the second sub-board away from the first sub-board and the second surface is A2, satisfying: A2 / A1≥2.

8. The cover according to claim 4, characterized in that: The embedded cover also has a third plate, which is arranged opposite to the first plate, connected to an end of the second plate away from the first plate, and is in close contact with the cover plate.

9. The cover according to claim 3, characterized in that: The embedded cover also includes a solder, which is received in the receiving groove. One end of the solder is in close contact with the inner wall surface of the second plate, and the other end is in contact with the cover plate.

10. A cover plate assembly, characterized in that: The invention comprises a cover plate and the embedded cover according to any one of claims 1 to 9, wherein the cover plate is connected to the embedded cover.

11. The cover plate assembly according to claim 10, characterized in that: The cover plate includes a main body and a connecting portion connected to each other, the connecting portion is arranged on the four edges of the main body, the main body includes a first surface and a second surface opposite to each other, the second surface is suitable for facing the battery cell assembly, the connecting portion protrudes from the first surface, and at least a portion of the connecting portion extends into the accommodating groove and abuts against the embedded cover and the shell.

12. The cover plate assembly according to claim 11, characterized in that: The connecting portion includes a first side surface and a second side surface, the first side surface and the second side surface are opposite to each other along a first direction, at least a portion of the first side surface is in close contact with the third plate of the embedded cover, and at least a portion of the second side surface is in close contact with the shell.

13. The cover plate assembly according to claim 12, characterized in that: The connecting portion further includes a third side surface, and the third side surface is arranged on a side of the second side surface away from the first side surface, and the third side surface is in close contact with the first sub-board of the embedded cover.

14. The cover plate assembly according to claim 13, characterized in that: The connecting portion also includes a first end face and a second end face, the first end face and the second end face are opposite to each other along a second direction, the first end face and the second end face are connected to two opposite ends of the third side face, the second end face is connected to the second side face, the first end face is tightly attached to the first face of the embedded cover, the second end face is tightly attached to the shell, and the second direction has an angle with the first direction.

15. The cover plate assembly according to claim 14, characterized in that: A connection angle B is formed between the second end face and the second side face, and satisfies: 60°≤B≤120°.

16. A battery, characterized in that: It comprises a shell, a battery cell assembly and a cover plate assembly as described in any one of claims 10 to 15, wherein the shell encloses a receiving cavity, the battery cell assembly is received in the receiving cavity, and the shell is connected to the cover plate assembly.

17. The battery according to claim 16, characterized in that The shell includes a first inner wall surface, a connecting surface and an outer surface, the first inner wall surface and the outer surface are opposite to each other, the connecting surface connects the first inner wall surface and the outer surface, at least part of the outer surface is in close contact with the first plate of the embedded cover, at least part of the first inner wall surface is in close contact with the second side surface of the cover plate, and the connecting surface is in close contact with the second end surface of the cover plate.

18. The battery according to claim 16, characterized in that The battery also includes a first pole and a second pole arranged at intervals, the first pole and the second pole are arranged at at least one end of the shell, the first pole and the second pole are both matched with the cover plate assembly, and the first pole and the second pole are both electrically connected to the battery cell assembly.

19. A battery device, characterized in that: Comprising a battery as claimed in any one of claims 16 to 18.

20. An electrical equipment, characterized in that: Comprising a battery device as claimed in claim 19.

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