Battery and battery pack with same

Abstract

The utility model relates to the technical field of battery manufacturing, and discloses a battery and a battery pack with the battery, and the battery comprises a shell provided with an opening; the pole group is arranged in the shell and comprises two tabs, and the opening is arranged corresponding to the positions of the two tabs; each pole assembly comprises a pole and a connecting piece, the pole is arranged in the shell, the connecting piece is connected between the pole and one tab, and the opening is located between the two poles; the sealing plate is connected with the shell and covers the opening, a part of the tab is located between the connecting piece and the sealing plate, a plurality of annular ribs are arranged on the outer surface of the sealing plate, each annular rib extends in the circumferential direction of the sealing plate, and the annular ribs are arranged at intervals in the direction from the center of the sealing plate to the edge of the sealing plate. The battery provided by the embodiment of the utility model has the advantages of saving the internal space and improving the space utilization rate.

Description

Technical Field

[0001] The utility model relates to the technical field of battery manufacturing, and particularly relates to a battery and a battery pack having the same. Background Art

[0002] For the batteries in the related art, it is usually necessary to weld the connecting piece to the tab. The connecting piece and the tab are usually welded outside the battery housing to avoid interference of the battery housing with the welding. In some processing technologies, in order to facilitate welding, through holes are opened in the battery housing to expose the connecting piece and the tab for welding, and then the through holes are covered with a sealing plate. However, the thickness of the sealing plate is usually the same as that of the housing, occupying too much internal space of the housing. Summary of the Utility Model

[0003] In view of this, the utility model provides a battery and a battery pack having the same to solve the problem that the sealing plate occupies too much internal space of the housing.

[0004] In a first aspect, the utility model provides a battery, comprising: a housing provided with an open mouth; a pole group disposed in the housing and including two tabs, the open mouth being disposed corresponding to the positions of the two tabs; two pole column assemblies, each pole column assembly including a pole column and a connecting piece, the pole column being disposed on the housing, the connecting piece being connected between the pole column and one of the tabs, the open mouth being located between the two pole columns; a sealing plate connected to the housing and covering the open mouth, a part of the tab being located between the connecting piece and the sealing plate, and a plurality of annular ribs being provided on the outer surface of the sealing plate, each annular rib extending along the circumferential direction of the sealing plate, and the plurality of annular ribs being spaced apart in the direction from the center of the sealing plate to the edge of the sealing plate.

[0005] Beneficial Effects: By providing the sealing plate, the open mouth can be sealed, avoiding the exposure of the connecting piece, the tab and the pole group to the air, reducing the probability of contact between the connecting piece, the tab and the pole group and the outside, ensuring the normal operation of the battery, and reducing the probability of battery damage. In addition, by providing a plurality of annular ribs on the outer surface of the sealing plate, the structural strength of each area of the sealing plate can be uniformly improved, and then the thickness of each area of the sealing plate can be reduced. The sealing plate occupies less internal space of the housing, saving internal space and improving space utilization rate, taking into account the strength of the sealing plate and the performance stability of the battery.

[0006] In an optional embodiment, a transverse rib is provided on the outer surface of the sealing plate, each annular rib surrounds the transverse rib, and the transverse rib extends along the length direction of the sealing plate.

[0007] Beneficial effects: It can greatly increase the structural strength of the sealing plate, thereby reducing the thickness of the sealing plate, saving internal space, and improving space utilization rate.

[0008] In an alternative embodiment, the thickness of the side wall of the housing provided with the open mouth is T, and the thickness of the sealing plate is t, where 0.3T ≤ t ≤ 0.6T.

[0009] Beneficial effects: The sealing plate has high structural strength and is not easily damaged. Moreover, the thickness of the sealing plate is relatively thin, occupying less space in the housing, saving internal space, and improving space utilization rate.

[0010] In an alternative embodiment, the height of the annular rib is H1, where 0.3T ≤ H1 ≤ 1.2T; and / or the height of the transverse rib is H2, where 0.3T ≤ H2 ≤ 1.2T.

[0011] Beneficial effects: While ensuring that the structural strength of the sealing plate meets the requirements, it is convenient for processing and avoids increasing weight and cost.

[0012] In an alternative embodiment, the width of the annular rib is W1, where 0.25T ≤ W1 ≤ 2.0T; and / or the width of the transverse rib is W2, where 0.25T ≤ W2 ≤ 2.0T.

[0013] Beneficial effects: It is both convenient for processing and can ensure the structural strength of the sealing plate, which is conducive to the thin and light design of the sealing plate, achieving the purpose of saving internal space and improving space utilization rate.

[0014] In an alternative embodiment, the distance between adjacent annular ribs is W3, where 0.25T ≤ W3 ≤ 2T; and / or the distance between the transverse rib and the nearest annular rib is W4, where 0.25T ≤ W4 ≤ 2T.

[0015] Beneficial effects: It is both convenient for processing and can ensure the structural strength of the sealing plate, which is conducive to the thin and light design of the sealing plate, achieving the purpose of saving internal space and improving space utilization rate.

[0016] In an alternative embodiment, the battery further includes: an insulating plate, which is disposed between the inner surface of the sealing plate and the tab.

[0017] Beneficial effects: By providing the insulating plate, the tab and the connecting piece can be isolated from the sealing plate, thereby avoiding the sealing plate being charged and causing battery leakage, and avoiding the sealing plate being connected to the two tabs and causing battery short circuit, ensuring that the battery can be used normally.

[0018] In an alternative embodiment, the distance between the annular rib closest to the edge of the sealing plate and the edge of the sealing plate is W5, where W5 ≥ 1.5 mm.

[0019] Beneficial effects: There is sufficient space between the annular rib and the edge of the sealing plate, facilitating the processing and manufacturing of the annular rib.

[0020] In an alternative embodiment, a plurality of weight-reducing annular grooves are provided on the inner surface of the sealing plate, and the plurality of weight-reducing annular grooves are arranged in one-to-one correspondence with the positions of the plurality of annular ribs.

[0021] Beneficial effects: It will neither cause the structural strength of the sealing plate at the location of the weight-reducing annular groove to be too low, nor can it play a role in reducing the weight of the sealing plate, saving processing materials, reducing material costs, and also saving internal space and improving space utilization.

[0022] In a second aspect, the present invention further provides a battery pack, including the battery described in the first aspect embodiment.

[0023] Beneficial effects: The battery pack has high space utilization. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the following drawings are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0025] Figure 1 It is a schematic structural diagram of the battery according to the embodiment of the present invention;

[0026] Figure 2 It is a cross-sectional view of the battery according to the embodiment of the present invention;

[0027] Figure 3 For Figure 2 It is a partial enlarged view of area A in

[0028] Figure 4 It is a schematic structural diagram of the housing of the battery according to the embodiment of the present invention;

[0029] Figure 5 It is one of the schematic structural diagrams of the sealing plate of the battery according to the embodiment of the present invention;

[0030] Figure 6 For Figure 5 It is a cross-sectional view along line A-A in

[0031] Figure 7 For Figure 5 It is a cross-sectional view along line B-B in

[0032] Figure 8The second structural schematic diagram of the sealing plate of the battery according to the embodiment of the present invention;

[0033] Figure 9 The mating schematic diagram of the battery housing, pole group and pole column assembly according to the embodiment of the present invention;

[0034] Figure 10 The first mating schematic diagram of the pole group and pole column assembly of the battery according to the embodiment of the present invention;

[0035] Figure 11 The second mating schematic diagram of the pole group and pole column assembly of the battery according to the embodiment of the present invention.

[0036] Explanation of reference numerals:

[0037] 1. Battery; 100. Housing; 110. Open mouth; 200. Pole group; 300. Pole column assembly; 310. Pole column; 320. Connecting piece; 330. Pole ear; 400. Sealing plate; 410. Ring rib; 420. Cross rib; 430. Weight reduction ring groove; 440. Weight reduction cross groove; 500. Insulating plate. Detailed implementation manners

[0038] In order to make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some but not all of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts fall within the protection scope of the present invention.

[0039] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0040] In the description of the present invention, "a plurality of" means two or more. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0041] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0042] The following will describe the embodiments of the present utility model in conjunction with Figures 1 to 11 .

[0043] According to an embodiment of the present utility model, on the one hand, a battery 1 is provided, which includes a housing 100, a pole group 200, two pole column assemblies 300, and a sealing plate 400.

[0044] The housing 100 is provided with an open mouth 110. The pole group 200 is disposed inside the housing 100 and includes two pole tabs 330. One of the two pole tabs 330 can be a positive pole tab and the other can be a negative pole tab. The pole group 200 further includes a pole group body, which is connected to the two pole tabs 330. The open mouth 110 is arranged corresponding to the positions of the two pole tabs 330.

[0045] Each pole column assembly 300 includes a pole column 310 and a connecting piece 320. The pole column 310 is disposed on the housing 100, and the connecting piece 320 is connected between the pole column 310 and a pole tab 330. One of the two pole column assemblies 300 is a positive pole column assembly and the other is a negative pole column assembly. The connecting piece 320 of the positive pole column assembly is connected to the positive pole tab, and the connecting piece 320 of the negative pole column assembly is connected to the negative pole tab.

[0046] The open mouth 110 is located between the two pole columns 310. The sealing plate 400 is connected to the housing 100 and covers the open mouth 110. A part of the pole tab 330 is located between the connecting piece 320 and the sealing plate 400. The outer surface of the sealing plate 400 is provided with a plurality of annular ribs 410. Each annular rib 410 extends along the circumferential direction of the sealing plate 400, and the plurality of annular ribs 410 are arranged at intervals in the radial direction of the sealing plate 400, that is, the plurality of annular ribs 410 are arranged at intervals in the direction from the center of the sealing plate 400 to the edge of the sealing plate 400.

[0047] During the processing of the battery 1, when the sealing plate 400 and the housing 100 are not connected, the connecting piece 320 and the tab 330 can be welded together through the open mouth 110. For example, the connecting piece 320 and the tab 330 can be welded by welding processes such as laser welding or ultrasonic welding, reducing the welding process of the connecting piece 320 and the tab 330, as well as the bending process of the connecting piece 320, and improving the production efficiency. Moreover, since the open mouth 110 is located between the two pole columns 310, the area of the open mouth 110 can be set relatively large, and thus the welding between the connecting piece 320 and the tab 330 is more convenient.

[0048] By providing the sealing plate 400, the open mouth 110 can be sealed, preventing the connecting piece 320, the tab 330, and the electrode assembly 200 from being exposed to the air, reducing the probability of contact between the connecting piece 320, the tab 330, and the electrode assembly 200 and the outside, ensuring the normal operation of the battery 1, and reducing the probability of damage to the battery 1.

[0049] In addition, by providing a plurality of annular ribs 410 on the outer surface of the sealing plate 400, the structural strength of each region of the sealing plate 400 can be uniformly improved, and thus the thickness of each region of the sealing plate 400 can be reduced. The sealing plate 400 occupies a small internal space of the housing 100, saving internal space and improving space utilization rate, taking into account both the strength of the sealing plate 400 and the performance stability of the battery 1.

[0050] Furthermore, a part of the tab 330 is located between the connecting piece 320 and the sealing plate 400, and the tab 330 only needs to be bent once, reducing the number of bends of the tab 330, which can reduce the layout space required for the tab 330, and thus further save internal space and improve space utilization rate.

[0051] As Figures 5 - 6 shown, in the technical solution of this embodiment, a transverse rib 420 is provided on the outer surface of the sealing plate 400, and each annular rib 410 is arranged around the transverse rib 420, and the transverse rib 420 extends along the length direction of the sealing plate 400. Among them, the transverse rib 420 is located on the central plane in the width direction of the sealing plate 400. By providing the transverse rib 420, the structural strength of the sealing plate 400 can be greatly increased, thereby reducing the thickness of the sealing plate 400, saving internal space, and improving space utilization rate.

[0052] As Figure 3 and Figure 5As shown, in the technical solution of this embodiment, the thickness of the side wall of the housing 100 with an open mouth 110 is T, and the thickness of the sealing plate 400 is t, where 0.3T ≤ t ≤ 0.6T. The thickness t of the sealing plate 400 can be 0.3T, 0.4T, 0.5T, or 0.6T. Among them, the thickness T of the side wall of the housing 100 with an open mouth 110 can be 1.5 mm to 2 mm, for example, it can be 1.5 mm, 1.6 mm, 1.7 mm, 1.8 mm, 1.9 mm, or 2 mm.

[0053] If t is less than 0.3T, the thickness of the sealing plate 400 is too thin, the structural strength is low, and the sealing plate 400 is easily damaged; if t is greater than 0.6T, the thickness of the sealing plate 400 is too thick, which occupies too much internal space of the housing 100 and affects the layout of the electrode group 200 and the terminal assembly 300. By setting 0.3T ≤ t ≤ 0.6T, the sealing plate 400 has relatively high structural strength and is not easily damaged, and the thickness of the sealing plate 400 is relatively thin, occupying less space of the housing 100, saving internal space, and improving space utilization.

[0054] As Figure 5 shown, in the technical solution of this embodiment, the height of the annular rib 410 is H1, where 0.3T ≤ H1 ≤ 1.2T. Among them, the height of the annular rib 410 can be 0.3T, 0.4T, 0.5T, 0.6T, 0.7T, 0.8T, 0.9T, 1.0T, 1.1T, or 1.2T.

[0055] If H1 is less than 0.3T, the height of the annular rib 410 is too low, resulting in low structural strength of the sealing plate 400; if H1 is greater than 1.2T, the height of the annular rib 410 is too high, which is inconvenient for processing the annular rib 410, and has a large weight and high cost. By setting 0.3T ≤ H1 ≤ 1.2T, while ensuring that the structural strength of the sealing plate 400 meets the requirements, it is convenient for processing and avoids an increase in weight and cost.

[0056] As Figure 5 shown, in the technical solution of this embodiment, the height of the transverse rib 420 is H2, where 0.3T ≤ H2 ≤ 1.2T. Among them, the height of the transverse rib 420 can be 0.3T, 0.4T, 0.5T, 0.6T, 0.7T, 0.8T, 0.9T, 1.0T, 1.1T, or 1.2T.

[0057] If H2 is less than 0.3T, the height of the transverse rib 420 is too low, resulting in low structural strength of the sealing plate 400; if H2 is greater than 1.2T, the height of the transverse rib 420 is too high, which is inconvenient for processing the transverse rib 420, and has a large weight and high cost. By setting 0.3T ≤ H2 ≤ 1.2T, while ensuring that the structural strength of the sealing plate 400 meets the requirements, it is convenient for processing and avoids an increase in weight and cost.

[0058] Among them, the height of the circumferential rib 410 and the height of the transverse rib 420 can be the same.

[0059] As Figure 7 shown, in the technical solution of this embodiment, the width of the circumferential rib 410 is W1, and 0.25T ≤ W1 ≤ 2.0T. Among them, the width of the circumferential rib 410 can be 0.25T, 0.3T, 0.4T, 0.5T, 0.6T, 0.7T, 0.8T, 0.9T, 1.0T, 1.1T, 1.2T, 1.3T, 1.4T, 1.5T, 1.6T, 1.7T, 1.8T, 1.9T or 2T.

[0060] If W1 is less than 0.25T, the width of the circumferential rib 410 is too small, resulting in low structural strength of the sealing plate 400; if W1 is greater than 2T, the width of the circumferential rib 410 is too large, resulting in a small gap between adjacent circumferential ribs 410, affecting the processing and manufacturing of the circumferential rib 410, or the small number of circumferential ribs 410 resulting in low structural strength of the sealing plate 400. By setting 0.25T ≤ W1 ≤ 2.0T, it is not only convenient for processing but also can ensure the structural strength of the sealing plate 400, which is beneficial to the thin and light design of the sealing plate 400, achieving the purpose of saving internal space and improving space utilization rate.

[0061] As Figure 7 shown, in the technical solution of this embodiment, the width of the transverse rib 420 is W2, and 0.25T ≤ W2 ≤ 2.0T. Among them, the width of the transverse rib 420 can be 0.25T, 0.3T, 0.4T, 0.5T, 0.6T, 0.7T, 0.8T, 0.9T, 1.0T, 1.1T, 1.2T, 1.3T, 1.4T, 1.5T, 1.6T, 1.7T, 1.8T, 1.9T or 2T.

[0062] If W2 is less than 0.25T, the width of the transverse rib 420 is too small, resulting in low structural strength of the sealing plate 400; if W2 is greater than 2T, the width of the transverse rib 420 is too large, resulting in a small gap between the transverse rib 420 and the circumferential rib 410, affecting the processing and manufacturing of the transverse rib 420 and the circumferential rib 410, or the small number of circumferential ribs 410 resulting in low structural strength of the sealing plate 400. By setting 0.25T ≤ W2 ≤ 2.0T, it is not only convenient for processing but also can ensure the structural strength of the sealing plate 400, which is beneficial to the thin and light design of the sealing plate 400, achieving the purpose of saving internal space and improving space utilization rate.

[0063] Among them, the width of the circumferential rib 410 and the width of the transverse rib 420 can be the same.

[0064] As Figure 5 and Figure 6As shown, in the technical solution of this embodiment, the distance between adjacent ring ribs 410 is W3, where 0.25T ≤ W3 ≤ 2T. Among them, the distance W3 between adjacent ring ribs 410 can be 0.25T, 0.3T, 0.4T, 0.5T, 0.6T, 0.7T, 0.8T, 0.9T, 1.0T, 1.1T, 1.2T, 1.3T, 1.4T, 1.5T, 1.6T, 1.7T, 1.8T, 1.9T or 2T.

[0065] If W3 is less than 0.25T, the distance between adjacent ring ribs 410 is too close, and adjacent ring ribs 410 may affect each other during processing, which is not convenient for processing; if W3 is greater than 2T, the distance between adjacent ring ribs 410 is too far, resulting in low structural strength of the sealing plate 400. By setting 0.25T ≤ W3 ≤ 2T, it is not only convenient for processing but also can ensure the structural strength of the sealing plate 400, which is beneficial to the thinning of the sealing plate 400, achieving the purpose of saving internal space and improving space utilization rate.

[0066] As Figure 5 and Figure 6 shown, in the technical solution of this embodiment, the distance between the transverse rib 420 and the nearest ring rib 410 is W4, where 0.25T ≤ W4 ≤ 2T. Among them, the distance W4 between the transverse rib 420 and the nearest ring rib 410 can be 0.25T, 0.3T, 0.4T, 0.5T, 0.6T, 0.7T, 0.8T, 0.9T, 1.0T, 1.1T, 1.2T, 1.3T, 1.4T, 1.5T, 1.6T, 1.7T, 1.8T, 1.9T or 2T.

[0067] If W4 is less than 0.25T, the distance between the transverse rib 420 and the ring rib 410 is too close, and the transverse rib 420 and the ring rib 410 may affect each other during processing, which is not convenient for processing; if W4 is greater than 2T, the distance between the transverse rib 420 and the ring rib 410 is too far, resulting in low structural strength of the sealing plate 400. By setting 0.25T ≤ W4 ≤ 2T, it is not only convenient for processing but also can ensure the structural strength of the sealing plate 400, which is beneficial to the thinning of the sealing plate 400, achieving the purpose of saving internal space and improving space utilization rate.

[0068] Among them, the distance W3 between adjacent ring ribs 410 and the distance W4 between the transverse rib 420 and the nearest ring rib 410 can be the same.

[0069] As Figure 2 and Figure 3As shown, in the technical solution of this embodiment, the battery 1 further includes an insulating plate 500, and the insulating plate 500 is disposed between the inner surface of the sealing plate 400 and the tab 330. Among them, the sealing plate 400 can be made of a metal material, and the sealing plate 400 and the housing 100 can be welded. The connection strength between the sealing plate 400 and the housing 100 is high and the sealing performance is good. The insulating plate 500 can be made of a heat-melting material such as insulating plastic.

[0070] By providing the insulating plate 500, both the tab 330 and the connecting piece 320 can be isolated from the sealing plate 400, thereby preventing the sealing plate 400 from being charged and causing the battery 1 to leak electricity, and preventing the sealing plate 400 from being connected to the two tabs 330 and causing the battery 1 to short-circuit, ensuring that the battery 1 can be used normally.

[0071] As Figure 5 and Figure 6 shown, in the technical solution of this embodiment, the distance between the outermost annular rib 410 and the edge of the sealing plate 400 is W5, and W5 is not less than 1.5 mm. Among them, the distance W5 between the outermost annular rib 410 and the edge of the sealing plate 400 can be 1.5 mm, 1.6 mm, 1.7 mm, 1.8 mm, 1.9 mm or 2 mm. And, the outermost annular rib 410 is the annular rib 410 closest to the edge of the sealing plate 400, and the distance between the outermost annular rib 410 and the transverse rib 420 is the farthest.

[0072] In this way, there is a relatively sufficient space between the annular rib 410 and the edge of the sealing plate 400, which is convenient for the processing and manufacturing of the annular rib 410.

[0073] As Figures 6 - 8 shown, in the technical solution of this embodiment, a plurality of weight-reducing annular grooves 430 are provided on the inner surface of the sealing plate 400, and the plurality of weight-reducing annular grooves 430 are arranged in one-to-one correspondence with the positions of the plurality of annular ribs 410. Since the structural strength of the sealing plate 400 in the area where the annular ribs 410 are provided is relatively high, the weight-reducing annular grooves 430 are provided and the positions of the weight-reducing annular grooves 430 are corresponding to the annular ribs 410, which will neither cause the structural strength of the sealing plate 400 at the location of the weight-reducing annular grooves 430 to be too low, nor can play the role of reducing the weight of the sealing plate 400, saving processing materials, reducing material costs, and also being able to save internal space and improve space utilization.

[0074] Wherein, a weight-reducing transverse groove 440 may be provided on the inner surface of the sealing plate 400, and the position of the weight-reducing transverse groove 440 is correspondingly set with that of the transverse rib 420. Since the structural strength of the sealing plate 400 is relatively high in the area where the transverse rib 420 is provided, the weight-reducing transverse groove 440 is provided and the position of the weight-reducing transverse groove 440 is corresponding to that of the transverse rib 420, which will neither cause the structural strength of the sealing plate 400 at the location of the weight-reducing transverse groove 440 to be too low, nor can play the role of reducing the weight of the sealing plate 400, save processing materials, reduce material costs, and also can save internal space and improve space utilization rate.

[0075] According to an embodiment of the present invention, on the other hand, a battery pack is further provided, including the battery 1 of the above embodiment.

[0076] The battery pack of the embodiment of the present invention has the advantage of high space utilization rate by using the battery 1 of the above embodiment.

[0077] Although the embodiments of the present invention are described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A battery, characterized in that: include: A shell, wherein the shell is provided with an open opening; A pole group, the pole group is arranged in the shell and includes two pole ears, and the open opening is arranged corresponding to the positions of the two pole ears; Two pole assemblies, each of which comprises a pole and a connecting piece, the pole is arranged on the housing, the connecting piece is connected between the pole and one of the pole ears, and the open opening is located between the two poles; A sealing plate is connected to the shell and covers the open port, a portion of the pole ear is located between the connecting plate and the sealing plate, a plurality of annular ribs are provided on the outer surface of the sealing plate, each of the annular ribs extends along the circumference of the sealing plate, and the plurality of annular ribs are spaced apart in a direction from the center of the sealing plate to the edge of the sealing plate.

2. The battery according to claim 1, characterized in that The outer surface of the sealing plate is provided with transverse ribs, each of the annular ribs is arranged around the transverse ribs, and the transverse ribs extend along the length direction of the sealing plate.

3. The battery according to claim 2, characterized in that The thickness of the side wall of the shell having the open opening is T, the thickness of the sealing plate is t, and 0.3T≤t≤0.6T.

4. The battery according to claim 3, characterized in that The height of the annular rib is H1, 0.3T≤H1≤1.2T; and / or The height of the transverse rib is H2, 0.3T≤H2≤1.2T.

5. The battery according to claim 3, characterized in that The width of the annular rib is W1, 0.25T≤W1≤2.0T; and / or The width of the transverse rib is W2, 0.25T≤W2≤2.0T.

6. The battery according to claim 3, characterized in that The spacing between adjacent annular ribs is W3, 0.25T≤W3≤2T; and / or The distance between the transverse reinforcement and the nearest annular reinforcement is W4, 0.25T≤W4≤2T.

7. The battery according to any one of claims 1 to 6, characterized in that Also includes: An insulating plate is disposed between the inner surface of the sealing plate and the electrode tab.

8. The battery according to any one of claims 1 to 6, characterized in that The distance between the annular rib closest to the edge of the sealing plate and the edge of the sealing plate is W5, and W5 is ≥ 1.5 mm.

9. The battery according to any one of claims 1 to 6, characterized in that The inner surface of the sealing plate is provided with a plurality of weight-reducing annular grooves, and the plurality of weight-reducing annular grooves are arranged in one-to-one correspondence with the positions of the plurality of annular ribs.

10. A battery pack, characterized in that: Comprising a battery according to any one of claims 1-9.

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