Pole, cover plate assembly and single battery

Abstract

The utility model provides a pole, a cover plate assembly and a single battery, and relates to the technical field of batteries. The pole comprises a main body and a connecting sheet; the connecting piece is provided with a main body connecting part, a plurality of fusing parts and a plurality of tab connecting parts, the main body connecting part is arranged in the middle of the connecting piece, the main body connecting part is connected with the main body, the fusing parts are arranged around the main body connecting part, and the tab connecting parts are in one-to-one correspondence with the fusing parts; and each tab connecting part is positioned on one side, deviating from the main body connecting part, of the fusing part corresponding to the tab connecting part. According to the invention, the fusing part is arranged on the pole, so that on the basis of meeting the fusing requirement of the single battery to ensure the reliability of the single battery, the arrangement of a connecting piece can be cancelled, and the space, originally used for arranging the connecting piece, in the single battery can be used for arranging the pole piece, so that the utilization rate of the internal space of the single battery can be improved; and the energy density of the single battery is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of batteries, in particular to a pole, a cover plate assembly and a single battery. BACKGROUND

[0002] When an abnormal large current occurs in the circuit in which the single battery is located or in the single battery, if the single battery continues to be in the abnormal large current state, the single battery is prone to overheat and risk of thermal runaway.

[0003] Therefore, in order to improve the reliability of the single battery, a fuse structure is arranged on the single battery. The fuse structure is the part with the smallest overcurrent capacity on the single battery, which can be fused when the current reaches the set fuse threshold, so as to cut off the current path, thereby effectively preventing the abnormal large current from damaging the single battery and improving the reliability of the battery.

[0004] In the related art, the fuse structure is arranged on the adapter connecting the tab and the pole. The arrangement of the adapter not only increases the number of components of the single battery, but also occupies the internal space of the single battery, which has an adverse effect on the energy density of the single battery. CONTENT OF THE INVENTION

[0005] Embodiments of the present application provide a pole, a cover plate assembly and a single battery, which can improve the utilization rate of the internal space of the single battery while ensuring the reliability of the single battery.

[0006] In a first aspect, embodiments of the present application provide a pole, which comprises a main body and a connecting sheet; the connecting sheet has a main body connecting portion, a plurality of fuse portions and a plurality of tab connecting portions, the main body connecting portion is arranged at the middle portion of the connecting sheet, the main body connecting portion is connected with the main body, the plurality of fuse portions are arranged around the main body connecting portion, and the plurality of tab connecting portions correspond to the plurality of fuse portions one by one, and each tab connecting portion is located on the side of the corresponding fuse portion away from the main body connecting portion.

[0007] In an embodiment, the fuse portion comprises a fuse hole arranged on the connecting sheet.

[0008] In an embodiment, the fuse hole is arranged along the circumference of the main body.

[0009] In an embodiment, the cross section of the main body is circular, and the fuse hole is an arc-shaped hole extending along the circumference of the main body.

[0010] In an embodiment, the fuse portion comprises two fuse holes, and the two fuse holes are arranged at intervals along the circumference of the main body.

[0011] In an embodiment, the fuse hole is a strip-shaped hole, and the tab connecting portion and the main body connecting portion are respectively located on both sides of the longest diameter of the strip-shaped hole.

[0012] In an embodiment, a plurality of notches are arranged on the connecting piece, and the plurality of notches are staggered along the circumference of the main body part with the plurality of tab connecting parts.

[0013] In an embodiment, a tab connecting area is arranged in the tab connecting part, and the distance between the edge line of the tab connecting area and the edge line of the tab connecting part in the width direction of the tab is d, which satisfies: d≥1mm.

[0014] In an embodiment, a hole is arranged in the connecting piece from the surface of the main body to the inside of the connecting piece, and the hole extends into the main body.

[0015] In a second aspect, an embodiment of the present application provides a cover plate assembly, which comprises a cover plate and the aforementioned pole, the main body is mounted on the cover plate, and the connecting piece is located on one side of the cover plate.

[0016] In a third aspect, an embodiment of the present application provides a single battery, which comprises a shell, an electrode assembly, and the aforementioned cover plate assembly; the electrode assembly is arranged in the shell; the cover plate is covered with the shell, and the tab of the electrode assembly is connected with the tab connecting part.

[0017] The beneficial effects of the embodiments of the present application are as follows:

[0018] In the embodiments of the present application, by arranging the fusing part on the pole, the connecting piece can be cancelled on the basis of meeting the fusing requirement of the single battery to ensure the reliability of the single battery, so that the space originally used for arranging the connecting piece in the single battery can be used for arranging the tab, thereby improving the utilization rate of the internal space of the single battery and improving the energy density of the single battery. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative effort.

[0020] Figure 1 is a structural schematic diagram of a pole provided by an embodiment of the present application;

[0021] Figure 2 is a bottom view of the pole provided by an embodiment of the present application;

[0022] Figure 3 is a schematic diagram of dividing each part of the connecting piece provided by an embodiment of the present application;

[0023] Figure 4 is a structural schematic diagram of another pole provided by an embodiment of the present application;

[0024] Figure 5 is a position diagram of the pole and the tab when welding, provided by an embodiment of the present application;

[0025] Figure 6 is a structure diagram of the pole from another perspective, provided by an embodiment of the present application;

[0026] Figure 7 is a structure diagram of the cover plate assembly, provided by an embodiment of the present application;

[0027] Figure 8 is a structure diagram of another cover plate assembly, provided by an embodiment of the present application;

[0028] Figure 9 is a structure diagram of the single battery, provided by an embodiment of the present application.

[0029] Explanation of reference signs:

[0030] 1-pole; 11-main body; 111-hole; 12-connection piece; 121-main body connection part; 122-fusing part; 1221-fusing hole; 123-tab connection part; 1231-tab connection area; 124-notch;

[0031] 2-cover plate assembly; 21-cover plate; 22-lower plastic part; 23-upper plastic part; 24-pressing block;

[0032] 3-single battery; 31-housing; 32-tab. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present application will be clearly and completely described in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application. In addition, it should be understood that the specific embodiments described herein are only used to illustrate and explain the present application, and are not used to limit the present application.

[0034] In the present application, the orientation words such as "upper" and "lower" used without the opposite description generally refer to the upper and lower in the actual use or working state of the device, specifically the drawing surface direction in the drawings. Multiple refers to at least two. The terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0035] In the description of the present application, it should be noted that unless specifically defined and limited, the terms "mounting", "connection", "connecting" should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, or it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0036] And the term "including", "containing" or any other variant thereof is intended to cover non-exclusive containing, so that the product including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or includes elements inherent to such product.

[0037] Please refer to Figures 1 to 3 , Figure 1 is a structural schematic diagram of a pole 1 provided by an embodiment of the present application, Figure 2 is a bottom view of the pole 1 provided by an embodiment of the present application, Figure 3 is a schematic diagram of dividing each part of the connecting piece 12. An embodiment of the present application provides a pole 1. The pole 1 includes a main body 11 and a connecting piece 12. The connecting piece 12 has a main body 11 connecting part, a plurality of melting parts 122 and a plurality of tab connecting parts 123. The main body 11 connecting part is arranged at the middle part of the connecting piece 12. The main body 11 connecting part is connected with the main body 11. The plurality of melting parts 122 are arranged around the main body 11 connecting part. The plurality of tab connecting parts 123 correspond to the plurality of melting parts 122 one by one. Each tab connecting part 123 is located on the side of the corresponding melting part 122 away from the main body 11 connecting part.

[0038] Among them, in order to facilitate the understanding of the position relationship between the main body 11 connecting part, the melting part 122 and the tab connecting part 123, on the basis of Figure 2 , each part is divided by a double-dot dashed line to obtain the structure shown in Figure 3 It can be understood that Figure 3 is only one of the many possibilities of the division of each part, and does not mean that each part must be divided according to the boundary line shown in Figure 3 , which can be changed according to the application scenario.

[0039] It can be understood that the tab connecting part 123 can be directly connected with the tab.

[0040] It can be understood that the main body 11 can be integrally formed with the connecting piece 12, or the main body 11 and the connecting piece 12 can be welded or riveted.

[0041] Exemplarily, the fuse structure can be a slot structure arranged on the connecting piece 12, can be a local thinning treatment of the connecting piece 12, or can be a low-melting conductive material arranged on the connecting piece 12, etc.

[0042] In the embodiment, by arranging the fuse portion 122 on the pole 1, the connecting piece 12 can be cancelled on the basis of meeting the fuse requirement of the single battery 3 to ensure the reliability of the single battery 3, so that the space originally used for arranging the connecting piece 12 in the single battery 3 can be used for arranging the pole piece, and thus the utilization rate of the space in the single battery 3 can be improved, and the energy density of the single battery 3 can be improved.

[0043] Meanwhile, compared with the structure that the fuse structure is arranged on the adapter, the fuse portion 122 is arranged on the pole 1 in the embodiment, so that the fuse can be generated when the current flows to the pole 1 when there is an abnormally large current outside the single battery 3. In this way, the current path can be cut off in time, and the abnormally large current can be prevented from being transmitted from the pole 1 to the next component of the single battery 3, so that the abnormally large current can be more effectively prevented from causing greater damage to the components in the single battery 3.

[0044] In addition, the plurality of lug connecting portions 123 are arranged in the embodiment, and the fuse structure is arranged for each lug connecting portion 123, so that the distribution of the current on the connecting piece 12 can be balanced, and the risk of local overheating of the connecting piece 12 caused by uneven distribution of the current can be reduced.

[0045] Please refer to Figure 1 In an embodiment, the fuse portion 122 includes a fuse hole 1221 arranged on the connecting piece 12. In this way, not only the fuse portion 122 is simple to form and easy to manufacture, but also more accurate fuse control can be provided to effectively ensure accurate fuse when the current path needs to be cut off.

[0046] Please refer to Figure 1 Or Figure 2 In an embodiment, the fuse hole 1221 is arranged along the circumference of the main body 11. In this way, the symmetry of the part of the connecting piece 12 close to the main body 11 can be improved, so that the stress state of the connecting piece 12 can be improved, and thus the reliability of the connection between the connecting piece 12 and the main body 11 can be improved.

[0047] Please refer to Figure 2 In an embodiment, the cross section of the main body 11 is circular, and the fuse hole 1221 is an arc-shaped hole extending along the circumference of the main body 11. In this way, compared with the main body 11 of other shapes, the main body 11 is arranged as a cylindrical shape in the embodiment, so that the structural symmetry of the pole 1 can be improved, and the uniformity of the stress distribution in the pole 1 can be improved.

[0048] Please refer to Figure 3In an embodiment, the fusing portion 122 comprises two fusing holes 1221. The two fusing holes 1221 are arranged along the circumference of the main body 11. In this way, the stress state of the connecting tab 12 at the fusing portion 122 can be improved to enhance the stress dispersion, thereby improving the reliability of the structure of the pole piece 1.

[0049] In another embodiment of the present application, the fusing hole 1221 can also have the following structure. Specifically, referring to Figure 4 , Figure 4 is another structural schematic diagram of the pole piece 1 provided by an embodiment of the present application. In an embodiment, the fusing hole 1221 is a strip-shaped hole. The tab connecting portion 123 and the main body 11 connecting portion are respectively located on both sides of the longest diameter of the strip-shaped hole. In this way, the fusing hole 1221 is simple to form and easy to manufacture, thereby improving the manufacturing efficiency of the pole piece 1.

[0050] Referring to Figure 1 , in an embodiment, a plurality of notches 124 are arranged on the connecting tab 12. The plurality of notches 124 and the plurality of tab connecting portions 123 are staggered along the circumference of the main body 11 portion. In this way, the material usage of the connecting tab 12 can be reduced, thereby reducing the weight of the connecting tab 12, which is conducive to reducing the weight of the pole piece 1.

[0051] Referring to Figure 5 , Figure 5 is a position schematic diagram when the pole piece 1 and the tab are welded, provided by an embodiment of the present application. In an embodiment, a tab connecting area 1231 is arranged in the tab connecting portion 123. In the width direction of the tab, the distance between the edge line of the tab connecting area 1231 and the edge line of the tab connecting portion 123 is d, which satisfies: d≥1mm.

[0052] It can be understood that the distance d between the edge line of the tab connecting area 1231 and the edge line of the tab connecting portion 123 includes but is not limited to 1mm, 1.5mm, 1.8mm, 2mm, 2.5mm, 3mm.

[0053] In the present embodiment, by the above limitation, when the tab and the pole piece 1 are welded, the tab can be prevented from being welded askew and misaligned with the tab connecting area 1231, thereby improving the reliability of the welding between the tab and the connecting tab 12.

[0054] Referring to Figure 6 , Figure 6 is another structural schematic diagram of the pole piece 1 from another perspective, provided by an embodiment of the present application. In an embodiment, a hole 111 is arranged from the surface of the connecting tab 12 away from the main body 11 to the inside of the connecting tab 12, and the hole extends into the main body 11. In this way, the material usage of the pole piece 1 can be reduced to reduce the weight of the pole piece 1, thereby facilitating the lightweight design of the single battery 3.

[0055] On the basis of the above-mentioned embodiments, the specific structure of the pole post 1 provided by the embodiments of the present application is described as follows.

[0056] Referring to Figure 3 In an embodiment, a tab connecting area 1231 is arranged in the tab connecting portion 123. The area of the tab connecting area 1231 is c, and the area of the tab connecting portion 123 is a, and 0.2a≤c≤0.9a is satisfied.

[0057] It can be understood that the tab welding area refers to the area where the connecting piece 12 and the tab are welded.

[0058] It can be understood that the tab connecting area 1231 can be an area with a larger surface roughness arranged on the tab connecting portion 123, or a region protruding outward on the tab connecting portion 123.

[0059] It can be understood that the area c of the tab connecting area 1231 includes but is not limited to 0.2a, 0.3a, 0.42a, 0.5a, 0.6a, 0.7a, 0.8a, and 0.9a.

[0060] In the present embodiment, by the above-mentioned arrangement, the size of the part where the tab is connected with the connecting piece 12 and the size of the tab connecting area 1231 can be compared and arranged, so that when the tab is connected with the tab connecting area 1231, the minimum requirement of the connection area between the tab and the connecting piece 12 can be met, and the edge of the part where the tab is connected with the connecting piece 12 can be prevented from exceeding the edge of the tab connecting portion 123, so that the tab can be prevented from affecting the arrangement of the fuse portion 122.

[0061] Referring to Figures 1 to 6 The embodiments of the present application provide a pole post 1. The pole post 1 comprises a main body 11 and a connecting piece 12. The connecting piece 12 has a main body 11 connecting portion, a plurality of fuse portions 122, and a plurality of tab connecting portions 123. The main body 11 connecting portion is arranged at the middle part of the connecting piece 12. The main body 11 connecting portion is connected with the main body 11. The plurality of fuse portions 122 are arranged around the main body 11 connecting portion. The plurality of tab connecting portions 123 correspond to the plurality of fuse portions 122 one by one. Each tab connecting portion 123 is located on the side of the corresponding fuse portion 122 away from the main body 11 connecting portion. The fuse portion 122 comprises a fuse hole 1221 arranged on the connecting piece 12.

[0062] Specifically, the fuse hole 1221 can be an arc-shaped hole. The cross section of the main body 11 is circular, the fuse hole 1221 extends along the circumference of the main body 11 to be an arc-shaped hole, and the fuse portion 122 comprises two fuse holes 1221 arranged at intervals along the circumference of the main body 11.

[0063] Specifically, the fusing hole 1221 can also be a strip-shaped hole, and in this case, the tab connecting portion 123 and the body 11 connecting portion are located on two sides of the longest diameter of the strip-shaped hole.

[0064] In addition, a plurality of notches 124 are arranged on the connecting tab 12. The plurality of notches 124 are arranged along the circumference of the body 11 portion and are spaced apart from the plurality of tab connecting portions 123.

[0065] Specifically, a tab connecting area 1231 is arranged in the tab connecting portion 123. The area of the tab connecting area 1231 is c, and the area of the tab connecting portion 123 is a, and 0.2a≤c≤0.9a is satisfied.

[0066] Specifically, a tab connecting area 1231 is arranged in the tab connecting portion 123. In the width direction of the tab, the distance between the edge line of the tab connecting area 1231 and the edge line of the tab connecting portion 123 is d, and d≥1mm is satisfied.

[0067] Specifically, a hole 111 is arranged in the connecting tab 12 from the surface of the connecting tab 12 away from the body 11 to the inside of the connecting tab 12, and the hole extends into the body 11.

[0068] Please refer to Figure 7 Or Figure 8 , Figure 7 is a structural schematic diagram of a cover plate assembly 2 provided by an embodiment of the present application, Figure 8 is a structural schematic diagram of another cover plate assembly 2 provided by an embodiment of the present application. An embodiment of the present application provides a cover plate assembly 2, which comprises a cover plate 21 and the aforementioned pole 1. The body 11 is mounted on the cover plate 21. The connecting tab 12 is located on one side of the cover plate 21.

[0069] It can be understood that the cover plate assembly 2 further comprises a lower plastic part 22, an upper plastic part 23, a sealing ring, and a pressing block 24. Among them, the lower plastic part 22 is located between the cover plate 21 and the connecting tab 12, and is used to insulate and isolate the electrode assembly from the cover plate 21. The pressing block 24 is located on the side of the cover plate 21 away from the lower plastic part 22, and is sleeved on the end of the body 11 away from the connecting tab 12. The upper plastic part 23 is sleeved on the body 11 and is located between the pressing block 24 and the cover plate 21, and is used to insulate and isolate the pressing block 24 and the cover plate 21. The sealing ring is sleeved on the body 11, and is used to seal and isolate the fitting part between the cover plate 21 and the body 11.

[0070] In the embodiment, by adopting the pole 1 provided by some embodiments of the present application, on the basis of meeting the fusing requirement of the single battery 3 to ensure the reliability of the single battery 3, the setting of the connecting tab 12 can be cancelled, so that the space originally used for arranging the connecting tab 12 in the single battery 3 can be used for arranging the tab, and then the utilization rate of the space in the single battery 3 can be improved, and the energy density of the single battery 3 can be improved.

[0071] Please refer to Figure 9 , Figure 9 is a structural schematic diagram of a single battery 3 provided by embodiments of the present application. Embodiments of the present application provide a single battery 3. The single battery 3 comprises a shell 31, an electrode assembly, and the aforementioned cover plate assembly 2. The electrode assembly is arranged in the shell 31. The cover plate 21 is covered with the shell 31. The tab 32 of the electrode assembly is connected with the tab connecting portion 123.

[0072] In the present embodiment, by adopting the cover plate assembly 2 provided by some embodiments of the present application, on the basis of meeting the fusing requirement of the single battery 3 to ensure the reliability of the single battery 3, the setting of the connecting sheet 12 can be cancelled, so that the space originally used for arranging the connecting sheet 12 in the single battery 3 can be used for arranging the tab, thereby the utilization rate of the internal space of the single battery 3 can be improved, and the energy density of the single battery 3 can be improved.

[0073] On the basis of the above-mentioned embodiments, the fusing portion 122 of a single battery 3 is described.

[0074] The capacity of a certain type of single battery 3 is 500 Ah, and the maximum overcurrent of the single battery 3 is set to 2000 A (i.e. the current fused by the fusing portion is greater than 2000 A). The connecting sheet is an aluminum sheet, and the thickness d thereof is 2 mm, and the fusing current thereof is 100 A / mm2. Correspondingly, it can be known that the overcurrent area of the fusing portion 122 is: S = 2000 A / 100 A / mm2 = 20 mm 2 . It can be known that the overcurrent length L1 of the fusing portion 122 is S / d = 20 mm 2 / 2 mm = 10 mm. Therefore, when the fusing hole 1221 is a strip-shaped hole or an arc-shaped hole, the overcurrent length of the fusing portion 122 after the fusing hole 1221 is set is 10 mm.

[0075] The above has described the embodiments of the present application in detail, and the principles and implementation manners of the present application have been described by applying specific examples; the above description of the embodiments is only used to help understand the core idea of the present application; meanwhile, for those skilled in the art, according to the idea of the present application, the specific implementation manner and application range can be changed; in summary, the content of the present description should not be understood as a limitation of the present application.

Claims

1. A pole, characterized in that The application relates to a battery pole, comprising: a body; a connecting sheet, provided with a body connecting part, a plurality of fusing parts and a plurality of tab connecting parts, the body connecting part is arranged at the middle part of the connecting sheet and is connected with the body, the plurality of fusing parts are arranged around the body connecting part, and the plurality of tab connecting parts correspond to the plurality of fusing parts one by one, and each tab connecting part is located on the side, away from the body connecting part, of the corresponding fusing part.

2. The pole according to claim 1, characterized in that The fusing part comprises a fusing hole arranged on the connecting sheet.

3. The pole according to claim 2, characterized in that The fusing hole is arranged in extension along the circumference of the body.

4. The pole according to claim 3, characterized in that The cross section of the body is circular, and the fusing hole is an arc-shaped hole extending along the circumference of the body.

5. The pole according to claim 3, wherein The fusing part comprises two fusing holes arranged in interval along the circumference of the body.

6. The pole according to claim 2, wherein The fusing hole is a strip-shaped hole, and the tab connecting part and the body connecting part are respectively located on the two sides of the longest diameter of the strip-shaped hole.

7. The pole according to any one of claims 1-6, characterized in that A plurality of notches are arranged on the connecting sheet, and the plurality of notches and the plurality of tab connecting parts are staggered along the circumference of the body part.

8. The pole according to any one of claims 1-6, characterized in that A tab connecting area is arranged in the tab connecting part, and the distance between the edge line of the tab connecting area and the edge line of the tab connecting part in the width direction of the tab is d, and d satisfies: d >= 1 mm.

9. The pole according to any one of claims 1-6, characterized in that A hole is arranged from the surface of the connecting sheet, away from the body, to the inside of the connecting sheet, and the hole extends into the body.

10. A cover plate assembly characterized by, The application relates to a battery pole, comprising: a cover plate; and the pole as claimed in any one of claims 1-9, wherein the body is mounted on the cover plate, and the connecting sheet is located on one side of the cover plate.

11. A single cell, characterized by The application relates to a battery pole, comprising: a shell; an electrode assembly arranged in the shell; and the cover plate assembly as claimed in claim 10, wherein the cover plate covers the shell, and the tab of the electrode assembly is connected with the tab connecting part. The application relates to a battery pole, comprising: a body; a connecting sheet, provided with a body connecting part, a plurality of fusing parts and a plurality of tab connecting parts, the body connecting part is arranged at the middle part of the connecting sheet and is connected with the body, the plurality of fusing parts are arranged around the body connecting part, and the plurality of tab connecting parts correspond to the plurality of fusing parts one by one, and each tab connecting part is located on the side, away from the body connecting part, of the corresponding fusing part. The fusing part comprises a fusing hole arranged on the connecting sheet. The fusing hole is arranged in extension along the circumference of the body. The cross section of the body is circular, and the fusing hole is an arc-shaped hole extending along the circumference of the body. The fusing part comprises two fusing holes arranged in interval along the circumference of the body. The fusing hole is a strip-shaped hole, and the tab connecting part and the body connecting part are respectively located on the two sides of the longest diameter of the strip-shaped hole. A plurality of notches are arranged on the connecting sheet, and the plurality of notches and the plurality of tab connecting parts are staggered along the circumference of the body part. A tab connecting area is arranged in the tab connecting part, and the distance between the edge line of the tab connecting area and the edge line of the tab connecting part in the width direction of the tab is d, and d satisfies: d >= 1 mm. A hole is arranged from the surface of the connecting sheet, away from the body, to the inside of the connecting sheet, and the hole extends into the body. The application relates to a battery pole, comprising: a cover plate; and the pole as claimed in any one of claims 1-9, wherein the body is mounted on the cover plate, and the connecting sheet is located on one side of the cover plate. The application relates to a battery pole, comprising: a shell; an electrode assembly arranged in the shell; and the cover plate assembly as claimed in claim 10, wherein the cover plate covers the shell, and the tab of the electrode assembly is connected with the tab connecting part.

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