Pole, cover plate assembly and battery

Abstract

The utility model relates to the technical field of batteries, aims to solve the technical problems of inaccurate pole positioning and low assembly yield, and provides a pole, a cover plate assembly and a battery. Wherein the pole is configured to be positioned on the positioning device during assembly, and the pole comprises a bottom plate and a terminal part. The bottom plate defines a positioning gap which is used for being matched with the positioning device so as to position the pole on the positioning device. The terminal part is convexly arranged on the surface of the bottom plate. The method has the beneficial effects that the positioning accuracy and the assembly yield of the pole are improved.

Description

TECHNICAL FIELD

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

[0002] In the assembly process of some known pole and top cover sheet of a cover plate assembly, the pole is not accurately positioned, and the assembly yield is not high. CONTENT OF THE UTILITY MODEL

[0003] The application provides a pole, a cover plate assembly and a battery to solve the technical problems of inaccurate positioning of the pole and low assembly yield.

[0004] The application provides a pole configured to be positioned on a positioning device when assembled, the pole comprising a bottom plate and a terminal portion. The bottom plate defines a positioning gap for cooperating with the positioning device to position the pole on the positioning device. The terminal portion protrudes from a surface of the bottom plate comprising the bottom plate and the terminal portion.

[0005] In a possible implementation, the bottom plate comprises a first portion and a second portion, the terminal portion protrudes from the first portion, and the second portion is connected to one end of the first portion along the length direction of the pole, and the width of the first portion is greater than the width of the second portion.

[0006] The bottom plate comprises a first portion and a second portion, the terminal portion protrudes from the first portion, and the second portion is connected to one end of the first portion along the length direction of the pole, and the width of the first portion is greater than the width of the second portion.

[0007] In a possible implementation, the first portion and the second portion are connected to each other along the length direction of the pole.

[0008] The side surface of the first portion and the side surface of the second portion form a groove recessed towards the inner side of the bottom plate, and the second portion is provided with the groove on both sides along the width direction of the bottom plate.

[0009] The application further provides a cover plate assembly comprising a first cover piece and the aforementioned pole. The first cover piece is provided with a mounting hole penetrating through the first cover piece along the thickness direction of the first cover piece. The pole is mounted on the first cover piece, and the terminal portion of the pole is arranged in the mounting hole.

[0010] According to the cover plate assembly of the application, in the assembly process of the pole and the first cover piece, the pole is first placed on the positioning device, and the positioning device is cooperated with the positioning gap to keep the bottom plate and the positioning device relatively fixed, and then the first cover piece is assembled on the pole. In the assembly process, the position of the pole is kept fixed, so that the position accuracy between the first cover piece and the pole can be improved, the possibility of installation deviation of the first cover piece can be reduced, the positioning accuracy of the pole can be improved, and the assembly yield can be improved.

[0011] In a possible implementation, the first cover piece comprises a first cover plate and a second cover plate, the first cover plate is provided with the mounting hole, and the second cover plate is arranged on the first cover plate.

[0012] The edge of the base plate of the pole post is located inside the edge of the first cover, and forms the positioning notch between the base plate and the edge of the first cover.

[0013] In one possible implementation:

[0014] The first cover includes a cover plate and a flange. The cover plate has the mounting hole, the flange is connected to the edge of the cover plate, and the base plate is spaced apart from the flange to form the positioning notch.

[0015] In one possible implementation:

[0016] The number of flanges is two, which are divided into a first flange and a second flange. The first flange is connected to one side of the cover plate in the width direction, and the second flange is connected to the other side of the cover plate in the width direction. The first flange and one side of the base plate define a positioning notch, and the second flange and the other side of the base plate define another positioning notch.

[0017] In one possible implementation:

[0018] The cover plate assembly also includes a sealing element sandwiched between the hole surface of the mounting hole and the outer peripheral surface of the terminal portion of the pole post.

[0019] In one possible implementation:

[0020] The first cover includes a cover plate and a positioning structure. The cover plate has the mounting hole. The positioning structure protrudes from the side of the cover plate facing the bottom plate and defines a positioning space. The edge of the positioning structure has a connecting port that connects to the positioning notch. The positioning space is used to position the bottom plate on the cover plate.

[0021] This application also provides a battery, including the aforementioned terminals and / or the aforementioned cover assembly. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the structure of a battery according to an embodiment of this application.

[0024] Figure 2 This is a schematic diagram of the structure of a battery according to another embodiment of this application.

[0025] Figure 3 This is a bottom view of a cover plate assembly according to an embodiment of this application.

[0026] Figure 4 for Figure 3 Sectional view at point AA.

[0027] Figure 5 This is a schematic diagram of the structure of a positioning device according to an embodiment of this application.

[0028] Figure 6 This is a schematic diagram of the positioning device and the pole in cooperation according to an embodiment of this application.

[0029] Figure 7 This is a schematic diagram of the pole structure according to an embodiment of this application.

[0030] Figure 8 This is a schematic diagram of the pole structure according to another embodiment of this application.

[0031] Figure 9 This is a schematic diagram of the pole structure according to another embodiment of this application.

[0032] Figure 10 This is an exploded view of a cover plate assembly according to an embodiment of this application.

[0033] Figure 11 for Figure 3 Sectional view at point BB.

[0034] Explanation of key component symbols:

[0035] Cover assembly 100

[0036] Column 10

[0037] Base plate 11

[0038] Part 111

[0039] Part Two, 112

[0040] Terminal section 12

[0041] First cover piece 20

[0042] Cover plate 21

[0043] Flange 22

[0044] First flange 221

[0045] Second flange 222

[0046] Positioning structure 23

[0047] Positioning unit 24

[0048] Seal 30

[0049] Conductive component 40

[0050] Second cover 50

[0051] Fastener 60

[0052] Battery 200

[0053] Casing 201

[0054] Battery cell 202

[0055] Positive extreme 2021

[0056] Negative extreme 2022

[0057] Mounting cavity Q1

[0058] Positioning space Q2

[0059] Clamping space Q3

[0060] Mounting hole K1

[0061] First perforation K2

[0062] Second perforation K3

[0063] Third perforation K4

[0064] Connector K5

[0065] Positioning notch C1

[0066] Contouring groove C2

[0067] Mounting slot C3

[0068] Groove C9

[0069] Positioning device 300

[0070] Support platform 301

[0071] Positioning protrusion 302

[0072] Clamping part 303

[0073] The following detailed description, in conjunction with the accompanying drawings, will further illustrate this application. Detailed Implementation

[0074] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments.

[0075] 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 may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. When a component is said to be "set on" another component, it can be directly set on the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0076] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used herein in the specification of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "or / and" as used herein includes any and all combinations of one or more of the associated listed items.

[0077] Some embodiments of this application are described in detail. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0078] See Figure 1 This embodiment provides a battery 200. The battery 200 can be a lithium-ion battery, a nickel-metal hydride battery, a fuel cell, etc.

[0079] The battery 200 includes a housing 201, a battery cell 202, and a cover assembly 100. The housing 201 has a mounting cavity Q1 open at least one end. The battery cell 202 is housed within the mounting cavity Q1 and can be charged or discharged. Specifically, the battery cell 202 may be a blade battery cell 202. The cover assembly 100 covers the open end of the mounting cavity Q1 to protect the battery cell 202 installed within the housing 201. The cover assembly 100 is also electrically connected to the battery cell 202.

[0080] In some embodiments, see Figure 2The mounting cavity Q1 extends through both ends of the housing 201, making both ends of the housing 201 open. The battery cell 202 has a positive terminal 2021 and a negative terminal 2022. The positive terminal 2021 corresponds to one opening of the mounting cavity Q1, and the negative terminal 2022 corresponds to the other opening of the mounting cavity Q1. There are two cover plate assemblies 100; one cover plate assembly 100 is electrically connected to the positive terminal 2021, and the other cover plate assembly 100 is electrically connected to the negative terminal 2022. The two cover plate assemblies 100 enclose both ends of the housing 201 and protect the battery cell 202 inside the housing 201. It is understood that the polarity of the terminals of the battery cells 202 electrically connected to the two cover plate assemblies 100 can be adaptively adjusted according to actual design requirements, as long as the polarities of the terminals of the battery cells 202 electrically connected to the two cover plate assemblies 100 are opposite.

[0081] Please refer to the following: Figures 3 to 7 The cover plate assembly 100 includes a first cover 20 and a terminal post 10. The first cover 20 has a mounting hole K1 that extends through the first cover 20 along its thickness direction. The terminal post 10 is configured to be positioned in a positioning device 300 during assembly. The terminal post 10 includes a base plate 11 and a terminal portion 12. The base plate 11 is connected to the battery cell 202. The base plate 11 defines a positioning notch C1 for engaging with the positioning device 300 to position the terminal post 10 in the positioning device 300. The terminal portion 12 protrudes from the surface of the base plate 11 and is configured to be received in the mounting hole K1.

[0082] During the assembly process of the cover plate assembly 100 of this application, the pole post 10 is first placed on the positioning device 300. The positioning device 300 cooperates with the positioning notch C1 to keep the base plate 11 and the positioning device 300 relatively fixed. Then, the first cover 20 is assembled on the pole post 10. During the assembly process, the terminal part 12 passes through the mounting hole K1. Since the position of the pole post 10 remains fixed, the positional accuracy between the first cover 20 and the pole post 10 is improved, the positioning accuracy of the pole post 10 is improved, and the assembly yield is improved.

[0083] Specifically, the positioning device 300 can be installed on the assembly equipment or assembly line to ensure that the pole post 10 does not loosen during the assembly process with the first cover 20, thereby improving the assembly reliability of the cover assembly 100.

[0084] In some embodiments, see Figure 3 and Figure 4The edge of the base plate 11 is located inside the edge of the first cover 20, and a positioning notch C1 is formed between the edge of the base plate 11 and the edge of the first cover 20. Thus, the positioning device 300 clamps the edge of the base plate 11, and then assembles the first cover 20 onto the pole post 10. During assembly, the terminal portion 12 passes through the mounting hole K1, and the edge of the first cover 20 is limited and guided by the positioning device 300, guiding the position of the first cover 20 to a position where the positioning notch C1 and the positioning device 300 accurately match. This improves the positional accuracy between the first cover 20 and the pole post 10, reduces the possibility of installation misalignment of the first cover 20, and thus improves the positioning accuracy of the pole post 10 and increases the assembly yield.

[0085] Furthermore, compared to the known base plate 11 of the pole post 10, the edge of the base plate 11 in this embodiment is offset inward relative to the edge of the first cover 20, thereby removing material from the base plate 11, reducing the mass of the pole post 10 and the cover assembly 100, increasing the energy density of the battery 200, and reducing the manufacturing cost of the battery 200.

[0086] In other embodiments, see Figure 7 The positioning notch C1 is provided on the surface of the base plate 11 opposite to the terminal portion 12 and is positioned and engaged with the positioning device 300, thereby enabling the positioning device 300 to position the pole post 10. In this embodiment, the cross-section of the positioning notch C1 can be constructed as an irregular shape or a polygon, etc.

[0087] In some embodiments, the number of pole posts 10 can be set to one, two, or more. The base plate 11 of each pole post 10 forms at least one positioning notch C1 between itself and the edge of the first cover 20, thereby achieving accurate positioning of each pole post 10. In this embodiment, the number of pole posts 10 is two. The edge of the first cover 20 simultaneously forms a positioning notch C1 between the base plates 11 of both pole posts 10.

[0088] In this embodiment, see Figure 5 and Figure 6 The positioning device 300 includes a support platform 301 and multiple positioning protrusions 302. The support platform 301 is used to be installed on a production line or assembly equipment and is used to support the base plate 11 of the pole post 10. The multiple positioning protrusions 302 protrude from the surface of the support platform 301 and extend into the positioning notch C1 to position the pole post 10 on the support platform 301, thereby fixing the pole post 10 relative to the support platform 301 and facilitating the improvement of the assembly accuracy between the first cover 20 and the pole post 10.

[0089] In some implementations, see Figure 5 and Figure 6The positioning device 300 also includes three clamping parts 303. The three clamping parts 303 are spaced apart on the support platform 301 along its length, and a clamping space Q3 is formed between adjacent clamping parts 303. The clamping space Q3 is used to clamp the base plate 11 along its length. Each clamping space Q3 has positioning protrusions 302 on both sides along the width of the base plate 11. In this way, the positioning device 300 can jointly position the pole post 10 along both the length and width of the base plate 11, ensuring that the pole post 10 is fixed relative to the positioning device 300 and improving assembly yield.

[0090] In some embodiments, the base plate 11 and the terminal portion 12 are constructed as an integral structure.

[0091] In some embodiments, see Figure 4 The surface of the base plate 11 facing away from the terminal portion 12 is flat. This increases the electrical contact area between the base plate 11 and the battery cell 202, thereby improving current transmission efficiency. In other embodiments, to further improve the positioning and installation effect of the pole piece 10, a groove or a protrusion may be provided on the surface of the base plate 11 facing away from the terminal portion 12 to cooperate with the positioning device 300, thereby further improving the positioning accuracy between the pole piece 10 and the first cover 20 and improving the assembly yield.

[0092] In some embodiments, see Figure 4 Along the width direction of the pole post 10, positioning notches C1 are defined between the two sides of the base plate 11 and the two sides of the first cover 20. In this way, the length of the base plate 11 can remain unchanged, and by reducing the width of the base plate 11, the welding requirements between the base plate 11 and the terminal of the cell 202 can be met, and the positioning notches C1 can be constructed between the base plate 11 and the first cover 20, thereby taking into account both the connection requirements and positioning requirements of the pole post 10.

[0093] In some embodiments, please refer again Figure 3 The first cover 20 also includes a positioning structure 23, which protrudes from the cover plate 21 on the side facing the bottom plate 11. The positioning structure 23 defines a positioning space Q2. The edge of the positioning structure 23 is provided with a connecting port K5 that connects to the positioning notch C1. The positioning space Q2 is used to position the bottom plate 11 on the cover plate 21.

[0094] Thus, the positioning structure 23 can improve the positioning reliability between the cover plate 21 and the base plate 11, reduce the possibility of misalignment between the base plate 11 and the first cover 20 during the use of the cover plate assembly 100, and improve the reliability of the cover plate assembly 100. The connecting port K5 can ensure that the positioning device 300 can position the pole post 10.

[0095] In some embodiments, the positioning structure 23 is disposed on the inner side of the flange 22, thereby avoiding interference problems in the positioning of the pole post 10.

[0096] In some embodiments, see Figure 3 The positioning structure 23 includes two positioning parts 24, which are spaced apart along the length of the base plate 11 and define a positioning space Q2. The two positioning parts 24 respectively abut against both ends of the base plate 11 along its length. A communication port K5 is also formed between the two positioning parts 24.

[0097] Thus, during the assembly of the first cover 20, the two positioning parts 24 will not interfere with the positioning protrusions 302 of the positioning device 300, thereby ensuring the smooth progress of the assembly process and improving the quality of the cover assembly 100 after assembly.

[0098] In some embodiments, a contour groove C2 is formed on the side of the positioning part 24 facing the pole post 10. The contour groove C2 is contoured to the end of the pole post 10 to further improve the positioning effect.

[0099] In some embodiments, see Figure 8 The base plate 11 includes a first part 111 and two second parts 112. A terminal portion 12 protrudes from the first part 111. Along the length of the pole post 10, the two second parts 112 are respectively connected to both ends of the first part 111. The width of the first part 111 is greater than the width of the second parts 112. A positioning notch C1 is defined between the second part 112 and the edge of the first cover 20. Thus, positioning notches C1 are formed at both ends of the base plate 11 along its length, allowing both second parts 112 to be positioned and clamped, further improving the positioning stability of the pole post 10, increasing the alignment accuracy between the pole post 10 and the first cover 20, and improving the assembly yield.

[0100] In some embodiments, a groove C9 is formed between the side of the first portion 111 and the side of the second portion 112, recessed towards the inside of the base plate 11. Grooves C9 are also formed on both sides of the second portion 112 along the width direction of the base plate 11. Thus, a positioning notch C1 is formed between the groove C9 and the first cover 20, and positioning notches C1 are formed on both sides of the base plate 11 in the width direction.

[0101] Specifically, after the pole post 10 is placed on the positioning device 300, the second part 112 is provided with a positioning protrusion 302 on both sides along its width direction.

[0102] In some implementations, see Figure 8The first part 111 is racetrack-shaped, with two oppositely arranged straight edges and two oppositely arranged curved edges. The curved edges protrude outward along the width direction of the pole post 10. The second part 112 is roughly rectangular, and the two second parts 112 are respectively connected to the two straight edges of the first part 111. In this way, the area of ​​the first part 111 can be further increased, thereby ensuring the contact area between the base plate 11 and the cell 202, and at the same time ensuring that a positioning notch C1 is formed between the second part 112 and the first cover 20.

[0103] In other implementations, see Figure 9 The base plate 11 can also be constructed in an elliptical shape, with the width at both ends of the base plate 11 being smaller than the width in the middle, so that the two ends of the base plate 11 along its width direction can form a positioning notch C1 with the first cover member 20. In this case, the first part 111 and the two second parts 112 together form the base plate 11. In other embodiments, the base plate 11 as a whole can also be constructed as an irregular structure, and the shape of the base plate 11 can be adjusted according to actual needs.

[0104] In some embodiments, the minimum size of the positioning notch C1 along the width direction of the base plate 11 is not less than 0.5 mm. For example, the size of the positioning notch C1 can be set to 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1 mm, etc. The size of the positioning notch C1 can be adjusted according to actual needs.

[0105] In some embodiments, see Figure 10 The cover plate assembly 100 also includes a seal 30, which is sandwiched between the hole surface of the mounting hole K1 and the outer peripheral surface of the terminal portion 12 of the pole post 10.

[0106] Thus, during the assembly of the cover plate assembly 100, after the pole post 10 is placed on the positioning device 300, the sealing element 30 is then fitted onto the terminal portion 12, and then the first cover 20 is assembled. During the assembly process, since the projection position of the pole post 10 on the first cover 20 remains fixed, the possibility of the sealing element 30 being pressed off by the first cover 20 can be greatly reduced, so that the sealing element 30 can get a better compression effect and achieve a reliable sealing effect, thereby reducing safety issues and improving the assembly yield.

[0107] The sealing element 30 can be specifically configured as a sealing ring and completely fitted onto the terminal portion 12.

[0108] In some embodiments, see Figure 11The first cover 20 includes a cover plate 21 and a flange 22. The cover plate 21 has a mounting hole K1, and the flange 22 is connected to the edge of the cover plate 21 and extends in a direction away from the terminal portion 12. The flange 22 is spaced from the edge of the base plate 11 and forms a positioning notch C1.

[0109] Thus, the edges of the cover plate 21, flange 22 and base plate 11 are configured with a downward-facing positioning notch C1, which facilitates positioning and engagement with the positioning device 300 and improves the positioning convenience of the pole post 10.

[0110] In other embodiments, the flange 22 may also extend along the width direction of the cover plate 21, thereby forming a positioning notch C1 with an opening facing the side of the cover plate 21 between the cover plate 21, the flange 22, and the base plate 11. The structure of the positioning device 300 can be adjusted according to the actual shape of the positioning notch C1 to complete the positioning of the pole post 10 without interfering with the installation of the first cover 20. Therefore, the position and shape of the positioning notch C1 in this embodiment can be adjusted according to actual processing requirements.

[0111] In some embodiments, see Figure 11 There are two flanges 22, namely a first flange 221 and a second flange 222. The first flange 221 is connected to one side of the cover plate 21 in the width direction, and the second flange 222 is connected to the other side of the cover plate 21 in the width direction. The first flange 221 and one side of the base plate 11 define a positioning notch C1, and the second flange 222 and the other side of the base plate 11 define another positioning notch C1. In this way, the two positioning notches C1 can position the base plate 11 along its width direction by the positioning device 300, so as to further improve the positioning accuracy of the pole post 10 and improve the assembly yield.

[0112] In some embodiments, see Figure 10 The cover assembly 100 also includes a conductive element 40, a second cover 50, and a fixing element 60. The conductive element 40 is located on the side of the first cover 20 opposite to the base plate 11. The second cover 50 is located on the side of the conductive element 40 opposite to the conductive element 40. The fixing element 60 is located on the side of the second cover 50 opposite to the second cover 50. The first cover 20 and the second cover 50 are both made of insulating materials such as plastic, and the conductive element 40 is made of conductive materials such as aluminum. Along a third direction, any two adjacent components of the base plate 11, the first cover 20, the conductive element 40, and the second cover 50 are connected to each other. The fixing element 60 is used for electrical connection between different batteries 200.

[0113] The conductive component 40 has a first through hole K2, the second cover 50 has a second through hole K3, and the fixing component 60 has a third through hole K4. The terminal portion 12 of the pole post 10 passes through the mounting hole K1 and then sequentially exits through the first through hole K2 and the second through hole K3, and is riveted to the fixing component 60 in the third through hole K4, and is connected to the inner surface of the fixing component 60 by welding. The number of the first through hole K2, the second through hole K3, and the third through hole K4 is the same as the number of pole posts 10.

[0114] See Figure 10 The second cover 50 has a mounting groove C3 recessed towards the bottom plate 11 on its surface opposite to the conductive element 40, and the fixing element 60 is fitted into the mounting groove C3. The first cover 20 is connected to the end of the housing 201 to close the mounting cavity Q1.

[0115] In some embodiments, the surface of the terminal portion 12 facing away from the base plate 11 is coplanar with the surface of the fixing member 60 facing away from the conductive member 40 (see [reference]). Figure 1 In this way, the surface of the fixing member 60 away from the conductive member 40 remains flat. When the surfaces of the fixing members 60 of the two batteries 200 come into contact with each other, the contact area between the batteries 200 can be further increased, thereby improving the current transmission efficiency and alleviating the heat generation caused by the small contact area.

[0116] In other embodiments, the surface of the terminal portion 12 facing away from the base plate 11 may also be disposed inside the third through hole K4, or extend beyond the surface of the fixing member 60 facing away from the conductive member 40.

[0117] The above embodiments are only used to illustrate the technical solutions of this application and are not intended to limit it. Although this application has been described in detail with reference to the above preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions to the technical solutions of this application should not depart from the spirit and scope of the technical solutions of this application.

Claims

1. A pole post, the pole post being configured to be positioned in a positioning device during assembly, characterized in that, The pole includes: A base plate, the base plate defining a positioning notch, the positioning notch being used to cooperate with the positioning device to position the pole post in the positioning device; Terminal portion, which protrudes from the surface of the base plate.

2. The pole post according to claim 1, characterized in that: The base plate includes a first part and a second part. The terminal portion protrudes from the first part along the length direction of the pole post. The second part is connected to one end of the first part. The width of the first part is greater than the width of the second part.

3. The pole post according to claim 2, characterized in that: A groove is formed between the side of the first part and the side of the second part, recessed towards the inside of the base plate. The second part has the groove formed on both sides along the width direction of the base plate.

4. A cover plate assembly, characterized in that, include: A first cover has a mounting hole that extends through the first cover along its thickness direction. The electrode post as described in any one of claims 1 to 3, wherein the electrode post is mounted on the first cover, and the terminal portion of the electrode post passes through the mounting hole.

5. The cover plate assembly according to claim 4, characterized in that: The edge of the base plate of the pole post is located inside the edge of the first cover, and forms the positioning notch between the base plate and the edge of the first cover.

6. The cover plate assembly according to claim 5, characterized in that: The first cover includes a cover plate and a flange. The cover plate has the mounting hole. The flange is connected to the edge of the cover plate and extends in a direction away from the terminal portion. The flange is spaced from the edge of the base plate and forms the positioning notch.

7. The cover plate assembly according to claim 6, characterized in that: The number of flanges is two, which are divided into a first flange and a second flange. The first flange is connected to one side of the cover plate in the width direction, and the second flange is connected to the other side of the cover plate in the width direction. The first flange and one side of the base plate define a positioning notch, and the second flange and the other side of the base plate define another positioning notch.

8. The cover plate assembly according to claim 4, characterized in that: The cover plate assembly also includes a sealing element sandwiched between the hole surface of the mounting hole and the outer peripheral surface of the terminal portion of the pole post.

9. The cover plate assembly according to claim 4, characterized in that: The first cover includes a cover plate and a positioning structure. The cover plate has the mounting hole. The positioning structure protrudes from the side of the cover plate facing the bottom plate and defines a positioning space. The edge of the positioning structure has a connecting port that connects to the positioning notch. The positioning space is used to position the bottom plate on the cover plate.

10. A battery, characterized in that, Includes the pole as described in any one of claims 1 to 3 and / or the cover plate assembly as described in any one of claims 4 to 9.

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