Battery

Abstract

The utility model provides a battery and relates to the technical field of batteries. The battery comprises a pole group, a shell, a pole and a connecting piece, a containing space is defined by the shell, a mounting opening is formed in the shell, a part of the pole is located in the mounting opening, the pole comprises a through hole, and the through hole penetrates through the pole in the first direction; the connecting piece comprises a mounting piece and a connecting piece, the connecting piece is connected with the mounting piece, and the mounting piece is arranged in the through hole and connected with the hole wall of the through hole; the pole group comprises a pole group body and a pole lug, the pole group body is arranged in the accommodating space, the pole lug extends out of the pole group body, and the pole lug is connected with the connecting piece. Compared with an existing solid pole, the pole provided by the utility model is of a hollow structure, and the mass of the pole is relatively small, so that the mass of the battery is relatively small, and the lightweight requirement of the battery is met.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to a battery. Background Technology

[0002] A battery generally includes a casing, a cover plate, and electrode assemblies. The casing has an opening, and the cover plate covers the opening. The electrode assemblies are housed inside the casing. The cover plate includes a plain aluminum plate, terminal posts, connecting tabs, and rivet blocks. An opening is formed in the plain aluminum plate, and the terminal posts are placed within the opening. The rivet blocks are located on one side of the plain aluminum plate, connecting the terminal posts to the rivet blocks for secure installation. The electrode tabs of the electrode assemblies are connected to the terminal posts in the cover plate via connecting tabs, thus establishing the connection between the electrode assemblies and the terminal posts.

[0003] However, the terminals have a large mass, which makes the battery heavy and hinders its lightweight design. Utility Model Content

[0004] In view of this, this application provides a battery to solve the problem that the large mass of the terminals makes the battery heavy, which is not conducive to the lightweighting of the battery.

[0005] This application provides a battery, which includes an electrode assembly, a housing, a terminal post, and a connecting piece. The housing encloses a receiving space and has an opening for mounting. A portion of the terminal post is located within the mounting opening. The terminal post includes a through hole that extends through the terminal post along a first direction.

[0006] The connecting piece includes a mounting component and a connecting component. The connecting component is connected to the mounting component. The mounting component is disposed in the through hole and is connected to the hole wall of the through hole.

[0007] The electrode assembly includes an electrode assembly body and electrode tabs. The electrode assembly body is disposed within the receiving space, and the electrode tabs extend from the electrode assembly body and are connected to the connector.

[0008] Preferably, there are two connectors, and the two connectors are connected to the mounting member on the same side in the second direction. The two connectors are spaced apart along a third direction, the second direction is perpendicular to the first direction, and the third direction is perpendicular to the plane determined by the first direction and the second direction.

[0009] Preferably, the connecting piece further includes a connector, both of which are connected to the connector, and at least a portion of the connector protrudes relative to the connector along the third direction;

[0010] The connector includes a first reference surface and a second reference surface that are opposite to each other in the first direction. The mounting member is connected to the first reference surface. The connecting piece includes an extension channel that extends from the second reference surface along the first direction into the interior of the mounting member.

[0011] Preferably, the battery further includes a welding component disposed inside the receiving space. The welding component has a mounting hole extending along the first direction. A portion of the electrode post extends into the mounting hole and connects to the wall of the mounting hole.

[0012] Preferably, the pole includes a first conductive element, a second conductive element, and a third conductive element connected in sequence, and a plane perpendicular to the first direction is defined as a reference plane, wherein the projection of the second conductive element along the first direction on the reference plane is located inside the projection of the third conductive element on the reference plane;

[0013] The first conductive element is connected to the welded component; a portion of the second conductive element is located inside the mounting opening, and the third conductive element is located outside the accommodating space.

[0014] Preferably, the wall of the mounting hole is divided into a welding surface and a contact surface. The welding surface is connected to the contact surface at a first end in the first direction, and the welding surface is inclined towards the outside of the mounting hole at a second end in the first direction. The angle between the welding surface and the reference plane is greater than or equal to 5 degrees and less than or equal to 75 degrees.

[0015] Preferably, the first conductive element includes a main body and a riveting part, the main body is connected to the second conductive element, the main body is in contact with the welding surface, the riveting part is connected to the contact surface, and the width of the riveting part is greater than or equal to 0.2 mm.

[0016] Preferably, the extension channel includes a first cavity and a second cavity that are connected to each other, and the connector has an extension hole, the wall of which surrounds the first cavity;

[0017] The mounting component includes a mounting part and a connecting part. The mounting part is arranged around the edge of the connecting part and is connected to the connector. The mounting part and the connecting part enclose the second cavity.

[0018] Preferably, the battery further includes a first plastic part and a second plastic part, the first plastic part and the second plastic part being respectively attached to the outer side wall of the housing and the inner side wall of the housing, the side of the third conductive part facing the second conductive part abutting against the first plastic part, and the welded part abutting against the second plastic part.

[0019] Preferably, there are two pole groups, and the two tabs with the same polarity in the two pole groups are respectively connected to the two connectors in the same connecting piece.

[0020] In the battery of this application, the battery includes an electrode assembly, a housing, terminal posts, and a connecting piece. The housing encloses a receiving space and has an opening for mounting. A portion of the terminal post is located within the mounting opening, and the terminal post includes a through hole extending through the terminal post along a first direction. The connecting piece includes a mounting member and a connector. The connector is connected to the mounting member, and the mounting member is disposed within the through hole and connected to the wall of the through hole. The electrode assembly includes an electrode assembly body and a tab. The electrode assembly body is disposed within the receiving space, and the tab extends from the electrode assembly body and is connected to the connector. Compared to existing solid terminal posts, the terminal post of this application is a hollow structure, resulting in a smaller terminal post mass. This reduces the overall battery mass, thereby meeting the lightweight requirements of the battery. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced 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.

[0022] Figure 1 A three-dimensional structural diagram of the battery is shown;

[0023] Figure 2 A schematic diagram of the battery's planar structure is shown;

[0024] Figure 3 Show Figure 2 A cross-sectional view of the battery obtained by cutting it along A-A';

[0025] Figure 4 Show Figure 3 Enlarged view of section B;

[0026] Figure 5 A three-dimensional structural diagram of the connecting piece is shown;

[0027] Figure 6 A cross-sectional view of the connecting piece is shown;

[0028] Figure 7 A cross-sectional view of the pole is shown;

[0029] Figure 8 A cross-sectional view of the welded component is shown.

[0030] Icons: 11-Base plate; 12-House; 2-Pole post; 21-First conductive element; 211-Riveting part; 212-Main body; 22-Second conductive element; 23-Third conductive element; 24-Through hole; 3-Connecting piece; 31-Connector; 32-Mounting part; 321-Mounting part; 322-Adapter part; 33-Connecting part; 34-Extension channel; 341-First cavity; 342-Second cavity; 4-Welded part; 41-Mounting hole; 42-Connecting hole; 5-Sealing element; 5 1-First sealing part; 52-Second sealing part; 6-First plastic part; 61-Support plate; 62-Enclosure plate; 7-Explosion-proof valve; 8-Pole assembly; 81-Pole assembly body; 82-Pole lug; 9-Second plastic part; S1-Mounting surface; S2-Connecting surface; S3-Guide surface; S4-Welding surface; S5-Contact surface; S6-First reference surface; S7-Second reference surface; S8-First connecting surface; S9-Second connecting surface; L1-First direction; L2-Second direction; L3-Third direction. Detailed Implementation

[0031] The following detailed embodiments are provided to help the reader gain a comprehensive understanding of the methods, apparatus, and / or systems described herein. However, various changes, modifications, and equivalents of the methods, apparatus, and / or systems described herein will be apparent after understanding the disclosure of this application. For example, the order of operations described herein is merely illustrative and is not limited to the order set forth herein; changes that will be apparent after understanding the disclosure of this application are possible, except for operations that must occur in a specific order. Furthermore, for clarity and brevity, descriptions of features known in the art may be omitted.

[0032] The features described herein may be implemented in different forms and should not be construed as being limited to the examples described herein. Rather, the examples described herein have been provided merely to illustrate some of the many feasible ways of implementing the methods, apparatus, and / or systems described herein that will be apparent upon understanding the disclosure of this application.

[0033] Throughout the specification, when an element (such as a layer, region, or substrate) is described as being "on" another element, "connected to" another element, "bonded to" another element, "on" another element, or "covering" another element, it may be directly "on" another element, "connected to" another element, "bonded to" another element, "on" another element, or "covering" another element, or there may be one or more other elements in between. In contrast, when an element is described as being "directly on" another element, "directly connected to" another element, "directly bonded to" another element, "directly on" another element, or "directly covering" another element, there may be no other elements in between.

[0034] As used herein, the term “and / or” includes any one of the relevant items listed and any combination of any two or more items.

[0035] Although terms such as “first,” “second,” and “third” may be used herein to describe individual components, assemblies, regions, layers, or parts, these components, assemblies, regions, layers, or parts are not limited by these terms. Rather, these terms are used only to distinguish one component, assembly, region, layer, or part from another. Therefore, without departing from the teachings of the examples described herein, the first component, assembly, region, layer, or part referred to as the second component, assembly, region, layer, or part may also be referred to as the second component, assembly, region, layer, or part.

[0036] For ease of description, spatial relation terms such as “above,” “upper,” “below,” and “lower” are used herein to describe the relationship between one element and another, as shown in the accompanying drawings. Such spatial relation terms are intended to include not only the orientation depicted in the drawings but also different orientations of the device during use or operation. For example, if the device in the drawings is flipped, an element described as being “above” or “upper” relative to another element will subsequently be “below” or “lower” relative to that other element. Therefore, the term “above” includes both “above” and “below” orientations depending on the spatial orientation of the device. The device may also be positioned in other ways (e.g., rotated 90 degrees or in other orientations), and the spatial relation terms used herein will be interpreted accordingly.

[0037] The terminology used herein is for the purpose of describing various examples only and is not intended to limit this disclosure. Unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. The terms “comprising,” “including,” and “having” enumerate the stated features, quantities, operations, components, elements, and / or combinations thereof, but do not exclude the presence or addition of one or more other features, quantities, operations, components, elements, and / or combinations thereof.

[0038] Variations in the shapes shown in the accompanying drawings may occur due to manufacturing techniques and / or tolerances. Therefore, the examples described herein are not limited to the specific shapes shown in the accompanying drawings, but include changes in shape that may occur during manufacturing.

[0039] The features of the examples described herein can be combined in various ways that will be apparent upon understanding the disclosure of this application. Furthermore, although the examples described herein have a wide variety of constructions, other constructions are possible, as will be apparent upon understanding the disclosure of this application.

[0040] The following will combine Figures 1 to 8 The battery described in this application is as follows: Figures 1 to 8 In the middle, the first direction L1, the second direction L2, and the third direction L3 are perpendicular to each other.

[0041] like Figures 1 to 8 As shown, the battery includes an electrode assembly 8, a housing 12, terminal posts 2, and a connecting piece 3. The housing 12 encloses an accommodating space and has an installation opening. A portion of the terminal post 2 is located within the installation opening. The terminal post 2 includes a through hole 24 that extends through the terminal post 2 along a first direction L1. The connecting piece 3 includes a mounting member 32 and a connecting member 31. The connecting member 31 is connected to the mounting member 32, and the mounting member 32 is disposed within the through hole 24 and connected to the hole wall of the through hole 24. The electrode assembly 8 includes an electrode assembly body 81 and a tab 82. The electrode assembly body 81 is disposed within the accommodating space, and the tab 82 extends from the electrode assembly body 81 and is connected to the connecting member 31. Compared to the existing solid terminal posts 2, the terminal post 2 of this application is a hollow structure, resulting in a smaller mass of the terminal post 2. This reduces the mass of the battery, thereby meeting the lightweight requirements of the battery.

[0042] Furthermore, such as Figure 1 and Figure 2 As shown, there are two mounting ports, two pole posts 2, and two connecting pieces 3. Two pole posts 2 are respectively positioned on two mounting ports, and each pole post 2 corresponds to one of the two connecting pieces 3. The connecting pieces 3 are fixed to the pole posts 2 corresponding to their respective connecting pieces 3. Figure 3 As shown, the electrode group 8 includes two tabs 82, which extend from the electrode group body 81. One tab is a positive tab and the other is a negative tab. The two tabs 82 of the electrode group 8 are connected to different connecting pieces 3.

[0043] like Figure 5 and Figure 6 As shown, there are two connectors 31. Both connectors 31 in the connecting piece 3 can be connected to the tabs 82, which makes the connecting piece 3 suitable for batteries with two electrode groups 8. Specifically, the battery includes two electrode groups 8, which are stacked in the housing 12 along a third direction L3. Two tabs 82 of the same polarity in the two electrode groups 8 are connected to the two connectors 31 of the same connecting piece 3, and the tabs 82 and the connectors 31 are attached to the side of the connecting piece 31 facing away from the electrode group body 81 in the first direction L1. The tabs 82 and the connectors 31 can be fixed by welding.

[0044] In the embodiments of this application, such as Figure 5 and Figure 6As shown, the connecting piece 3 also includes a connector 33, to which both connectors 31 are connected. The connector 33 is flat and includes a first reference surface S6 and a second reference surface S7 that are opposite to each other in the first direction L1. The mounting piece 32 is connected to the first reference surface S6. The connecting piece 3 includes an extension channel 34 that extends from the second reference surface S7 along the first direction L1 into the interior of the mounting piece 32. Thus, the connecting piece 3 is also a hollow structure, which further reduces the weight of the battery.

[0045] Furthermore, the two connectors 31 are connected to the connector 33 on the same side in the second direction L2, and the two connectors 31 are spaced apart along the third direction L3, so that a hollow area appears between the two connectors 31. At least a portion of the connector 31 protrudes relative to the connector 33 along the third direction L3, so that the end face of the connector 31 facing away from the hollow area extends beyond the connector 33.

[0046] Optionally, the extension channel 34 includes a first cavity 341 and a second cavity 342 that are connected to each other. The connector 33 has an extension hole, and the wall of the extension hole surrounds the first cavity 341. The mounting part 32 includes a mounting part 321 and a transition part 322. The mounting part 321 surrounds the edge of the transition part 322 and is connected to the connector 33. The mounting part 321 and the transition part 322 surround the second cavity 342.

[0047] Furthermore, the mounting portion 321 has a first connecting surface S8, a second connecting surface S9, and a guide surface S3. The first connecting surface S8 is located on the side of the mounting portion 321 opposite to the second cavity 342, and the second connecting surface S9 is located on the side of the adapter portion 322 opposite to the second cavity 342. The first connecting surface S8 is in contact with the mounting surface S1 described below, and the second connecting surface S9 can be connected to the contact plate used to connect batteries. The first connecting surface S8 and the second connecting surface S9 are connected by the guide surface S3. In the direction from the mounting portion 321 to the adapter portion 322, the guide surface S3 gradually narrows, and when the connecting piece 3 is installed into the through hole 24, the guide surface S3 can play a guiding role. In addition, the adapter portion 322 can be directly connected to the contact plate used to connect batteries, which allows the current flowing out of the electrode group 8 to flow directly to the contact plate through the connecting piece 3, shortening the current flow path and thus reducing the internal resistance.

[0048] Preferably, the entire connecting piece 3 is integrally formed.

[0049] In the embodiments of this application, the wall of the through hole 24 is divided into a mounting surface S1 and a connecting surface S2. The first end of the connecting surface S2 is connected to the mounting surface S1, and the second end of the connecting surface S2 is inclined towards the outside of the through hole 24. That is, in the direction from the first conductive element 21 to the second conductive element 22, the connecting surface S2 gradually narrows, and when the connecting piece 3 is installed into the interior of the through hole 24, the connecting surface S2 can play a guiding role. At the same time, the guide surface S3 cooperates with the connecting surface S2 to improve the ease of assembly between the connecting piece 3 and the pole post 2.

[0050] like Figure 4 and Figure 7 As shown, the pole post 2 includes a first conductive element 21, a second conductive element 22, and a third conductive element 23 connected in sequence. A plane perpendicular to a predetermined direction is defined as a reference plane. The orthographic projection of the first conductive element 21 along the predetermined direction on the reference plane is located inside the projection of the second conductive element 22 along the predetermined direction on the reference plane. The projection of the second conductive element 22 along the predetermined direction on the reference plane is located inside the projection of the third conductive element 23 on the reference plane. In other words, the entire pole post 2 has a stepped structure.

[0051] like Figure 4 and Figure 8 As shown, the welding component 4 has a mounting hole 41 and a connecting hole 42. The mounting hole 41 and the connecting hole 42 penetrate the welding component 4 in a predetermined direction. A portion of the pole post 2 extends into the mounting hole 41 and connects to the welding component 4. In this way, the pole post 2 can be fixed by setting the welding component 4.

[0052] Preferably, the pole post 2 and the welding component 4 are fixed by laser welding.

[0053] Furthermore, the wall of the mounting hole 41 is divided into a contact surface S5 and a welding surface S4. The welding surface S4 is connected to the contact surface S5 at its first end in a predetermined direction, and the welding surface S4 is inclined towards the outside of the mounting hole 41 at its second end in a predetermined direction. The first conductive element 21 of the pole post 2 includes a main body 212 and a riveting part 211. The main body 212 is fitted to the contact surface S5, and the riveting part 211 is connected to the welding surface S4, thereby realizing the fixation between the pole post 2 and the welding part 4.

[0054] Furthermore, the angle α between the welding surface S4 and the reference plane is greater than or equal to 5 degrees and less than or equal to 75 degrees, i.e., 5 degrees ≤ α ≤ 75 degrees. This ensures the stability of the connection between the welded part 4 and the pole post 2. Optionally, the angle α between the welding surface S4 and the reference plane can be 5 degrees, 10 degrees, 15 degrees, 20 degrees, 30 degrees, 40 degrees, 50 degrees, 55 degrees, 60 degrees, 65 degrees, 70 degrees, or 75 degrees, etc.

[0055] Furthermore, the width t of the riveting portion 211 is greater than or equal to 0.2 mm, i.e., t ≥ 0.2 mm, which can further improve the stability of the connection between the welded part 4 and the pole post 2. Optionally, the width t of the riveting portion 211 can be 0.2 mm, 0.23 mm, 0.25 mm, etc.

[0056] Furthermore, such as Figure 4 As shown, the battery also includes a first plastic part 6 and a second plastic part 9. The first plastic part 6 includes a support plate 61 and a surrounding plate 62. The support plate 61 is fitted to the outer wall of the housing 12, and the surrounding plate 62 surrounds the support plate 61. The support plate 61 has a connection port that communicates with the mounting port. A portion of the second conductive element 22 is located within the connection port, and the side of the third conductive element 23 facing the second conductive element 22 abuts against the second plastic part 9. The outer wall of the third conductive element 23 is fitted to the surrounding plate 62. Thus, by setting the first plastic part 6, insulation between the terminal post 2 and the housing 12 can be achieved. The second plastic part 9 is disposed between the welded part 4 and the inner wall of the housing 12 to achieve insulation between the welded part 4 and the housing 12.

[0057] Preferably, the battery further includes a sealing element 5, which includes a first sealing part 51 and a second sealing part 52 connected to each other. The first sealing part 51 is sleeved on the second conductive element 22 to achieve a seal between the second conductive element 22 and the housing 12. The second sealing part 52 protrudes from the outer side wall of the first sealing part 51. The two sides of the second sealing part 52 in the first direction L1 are respectively attached to the inner side wall of the housing 12 and the third conductive element 23 to achieve a seal between the third conductive element 23 and the housing 12.

[0058] In addition, the battery also includes a base plate 11 and an explosion-proof valve 7. The housing 12 has an opening, and the base plate 11 covers the opening and is connected to the housing 12. The first plastic part 6, the second plastic part 9, and the explosion-proof valve 7 are all located on the side of the housing 12 where the terminal post 2 is located. The heat generated during the welding of the housing 12 and the base plate 11 has little impact on the first plastic part 6, the second plastic part 9, and the explosion-proof valve 7.

[0059] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A battery, characterized in that, The battery includes an electrode assembly, a housing, electrode posts, and a connecting piece. The housing encloses an accommodating space and has an opening for mounting. A portion of the electrode post is located within the mounting opening. The electrode post includes a through hole that extends through the electrode post along a first direction. The connecting piece includes a mounting component and a connecting component. The connecting component is connected to the mounting component. The mounting component is disposed in the through hole and is connected to the hole wall of the through hole. The electrode assembly includes an electrode assembly body and electrode tabs. The electrode assembly body is disposed within the receiving space, and the electrode tabs extend from the electrode assembly body and are connected to the connector.

2. The battery according to claim 1, characterized in that, The number of connectors is two, and the two connectors are connected to the same side of the mounting member in the second direction. The two connectors are spaced apart along a third direction. The second direction is perpendicular to the first direction, and the third direction is perpendicular to the plane determined by the first direction and the second direction.

3. The battery according to claim 2, characterized in that, The connecting piece further includes a connector, both of which are connected to the connector, and at least a portion of the connector protrudes relative to the connector along the third direction; The connector includes a first reference surface and a second reference surface that are opposite to each other in the first direction. The mounting member is connected to the first reference surface. The connecting piece includes an extension channel that extends from the second reference surface along the first direction into the interior of the mounting member.

4. The battery according to claim 2, characterized in that, The battery also includes a welding component disposed inside the receiving space. The welding component has a mounting hole extending along the first direction. A portion of the electrode post extends into the mounting hole and connects to the wall of the mounting hole.

5. The battery of claim 4, wherein, The pole includes a first conductive element, a second conductive element, and a third conductive element connected in sequence. A plane perpendicular to the first direction is defined as a reference plane. The projection of the second conductive element along the first direction onto the reference plane is located inside the projection of the third conductive element onto the reference plane. The first conductive element is connected to the welded component; a portion of the second conductive element is located inside the mounting opening, and the third conductive element is located outside the accommodating space.

6. The battery of claim 5, wherein, The wall of the mounting hole is divided into a welding surface and a contact surface. The welding surface is connected to the contact surface at a first end in the first direction. The welding surface is inclined towards the outside of the mounting hole at a second end in the first direction. The angle between the welding surface and the reference plane is greater than or equal to 5 degrees and less than or equal to 75 degrees.

7. The battery of claim 6, wherein, The first conductive component includes a main body and a riveting part. The main body is connected to the second conductive component and is in contact with the contact surface. The riveting part is connected to the welding surface and the width of the riveting part is greater than or equal to 0.2 mm.

8. The battery according to claim 3, characterized in that, The extension channel includes a first cavity and a second cavity that are connected to each other. The connector has an extension hole, and the wall of the extension hole surrounds the first cavity. The mounting component includes a mounting part and a connecting part. The mounting part is arranged around the edge of the connecting part and is connected to the connector. The mounting part and the connecting part enclose the second cavity.

9. The battery according to claim 5, characterized in that, The battery also includes a first plastic part and a second plastic part, the first plastic part and the second plastic part being respectively attached to the outer side wall of the housing and the inner side wall of the housing, the side of the third conductive part facing the second conductive part abutting against the first plastic part, and the welded part abutting against the second plastic part.

10. The battery according to claim 2, characterized in that, The number of electrode groups is two, and the two electrode tabs with the same polarity in the two electrode groups are respectively connected to the two connectors in the same connecting piece.

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