Battery

Abstract

The utility model provides a battery and relates to the technical field of batteries. The battery comprises a shell, a pole group, a pole column and an electric connecting piece, a containing space is defined by the shell, a mounting opening is formed in the shell, and the mounting opening is communicated with the containing space; the pole is arranged on the mounting opening, a through hole is formed in the pole, the through hole penetrates through the pole in the preset direction and is communicated with the containing space, and the electric connecting piece is fixed to the pole so as to seal the end, back to the containing space, of the through hole in the preset direction; the pole group comprises a pole group body and a pole lug, and the pole lug extends into the through hole and is connected with the electric connecting piece. Therefore, the current of the pole group can be directly led out through the electric connecting piece, the flowing path of the current is shortened, and the internal resistance of the battery is reduced.

Description

Technical Field

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

[0002] A battery typically includes connecting tabs, a casing, electrode arrays, and a cover. The casing encloses a receiving space and has an opening that communicates with the receiving space. The cover covers the opening and is connected to the casing. The electrode arrays are disposed within the receiving space, and the electrode tabs of the electrode arrays are connected to the terminals in the cover via connecting tabs.

[0003] However, when the battery is in use, the current of the electrode group needs to be drawn out through the connecting pieces and terminals, the current flow path is relatively long, and the internal resistance of the battery is relatively large. Utility Model Content

[0004] In view of this, this application provides a battery to solve the problem that the current of the electrode group needs to be drawn out through the connecting piece and the terminal, the current flow path is long, and the internal resistance of the battery is large.

[0005] This application provides a battery, which includes a housing, an electrode group, terminal posts and electrical connectors. The housing encloses a receiving space and has an installation opening that communicates with the receiving space.

[0006] The electrode post is disposed on the mounting port, and the electrode post has a through hole. The through hole penetrates the electrode post in a predetermined direction and communicates with the receiving space. The electrical connector is connected to the inner wall of the through hole to close the end of the through hole facing away from the receiving space in the predetermined direction.

[0007] The electrode assembly includes an electrode assembly body and an electrode tab, the electrode tab extending into the through hole and connected to the electrical connector.

[0008] Preferably, the battery further includes a welding component disposed inside the receiving space. The welding component has a mounting hole extending along the predetermined direction. A portion of the electrode post extends into the mounting hole and is connected to the welding component.

[0009] Preferably, the pole post includes a first conductive part, a second conductive part, and a third conductive part connected in sequence, the first conductive part being connected to the welded part; a portion of the second conductive part is located inside the mounting opening, and the third conductive part is located outside the receiving space;

[0010] A plane perpendicular to the predetermined direction is defined as a reference plane, and the projection of the second conductive part on the reference plane along the predetermined direction is located inside the projection of the third conductive part on the reference plane.

[0011] Preferably, the battery further includes a plastic component that is fitted to the outer wall of the housing. The plastic component has a connecting port that communicates with the mounting port. A portion of the second conductive part is located within the connecting port, and the side of the third conductive part facing the second conductive part abuts against the plastic component.

[0012] Preferably, the through hole includes a first hole portion and a second hole portion, wherein the second hole portion communicates with the side of the first hole portion opposite to the receiving space in the predetermined direction;

[0013] The electrical connector includes a first connecting portion and a second connecting portion. The projection of the first connecting portion along the predetermined direction onto the reference plane is located inside the projection of the second connecting portion along the predetermined direction onto the reference plane. The first connecting portion is disposed inside the first hole, and the second connecting portion is disposed inside the second hole.

[0014] Preferably, the wall of the mounting hole is divided into a welding surface and a mating surface, the welding surface is connected to the mating surface at a first end in a predetermined direction, the welding surface is inclined toward the outside of the mounting hole at a second end in the predetermined direction, and the pole post is connected to the welding surface.

[0015] Preferably, 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.

[0016] Preferably, the housing further includes a seal, the seal comprising a first sealing portion, the first sealing portion including a first sealing surface and a second sealing surface opposite to each other in the predetermined direction, the first sealing surface being in contact with the welded part, a portion of the second sealing surface being in contact with the second conductive part, and another portion of the second sealing surface being in contact with the inner sidewall of the housing.

[0017] Preferably, the seal further includes a second sealing portion, which is connected to the second sealing surface and is located between the inner wall of the mounting port and the second conductive portion.

[0018] Preferably, there are two mounting ports, two poles, and two electrical connectors. The two mounting ports are located on the same side of the housing in the predetermined direction, and the two poles are respectively disposed on the two mounting ports.

[0019] The two poles correspond to two electrical connectors, and the electrical connectors are fixed on the poles corresponding to the electrical connectors.

[0020] The battery of this application includes a casing, an electrode assembly, terminals, and an electrical connector. The casing encloses a receiving space and has an opening that communicates with the receiving space. The terminals are disposed on the opening and have through holes that extend through the terminals in a predetermined direction and communicate with the receiving space. The electrical connector is fixed to the terminals to close the end of the through hole facing away from the receiving space in the predetermined direction. The electrode assembly includes an electrode assembly body and tabs that extend into the through holes and are connected to the electrical connector. In this way, the current from the electrode assembly can be directly led out through the electrical connector, shortening the current flow path and thus reducing the internal resistance 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 cross-sectional view of the pole is shown;

[0027] Figure 6 A cross-sectional view of the welded component is shown.

[0028] Icons: 1-Housing; 2-Pole assembly; 21-Pole assembly body; 22-Pole tab; 3-Pole post; 31-First conductive part; 311-Straight section; 312-Inclined section; 32-Second conductive part; 33-Third conductive part; 34-Fourth conductive part; 35-Through hole; 351-First hole; 352-Second hole; 4-Electrical connector; 41-First connection part; 42-Second connection part; 5-Base plate; 6-Welded part; 61-Mounting hole; 62-Connecting hole; 7-Plastic part; 71-Support plate; 72-Enclosure plate; 8-Sealing element; 81-First sealing part; 82-Second sealing part; 9-Explosion-proof valve; S1-Welding surface; S2-Mating surface; S3-Reference plane; L-Predetermined direction. Detailed Implementation

[0029] 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.

[0030] 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.

[0031] 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.

[0032] As used herein, the term “and / or” includes any one of the relevant items listed and any combination of any two or more items.

[0033] 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.

[0034] 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.

[0035] 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.

[0036] 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.

[0037] 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.

[0038] According to one aspect of this application, a battery is provided, such as Figures 1 to 6 As shown, the battery of this application includes a casing 1, an electrode assembly 2, terminal posts 3, and an electrical connector 4. The casing 1 encloses a receiving space and has an installation opening that communicates with the receiving space. The terminal posts 3 are disposed on the installation opening and have a through hole 35 that extends through the terminal posts 3 along a predetermined direction L and communicates with the receiving space. The electrical connector 4 is fixed to the terminal posts 3 to close the end of the through hole 35 that faces away from the receiving space in the predetermined direction L. The electrode assembly 2 includes an electrode assembly body 21 and a tab 22. The tab 22 extends into the through hole 35 and is connected to the electrical connector 4. In this way, the current of the electrode assembly 2 can be directly led out through the electrical connector 4, shortening the current flow path and thus reducing the internal resistance of the battery.

[0039] In addition, the explosion-proof valve 9 is also installed on the housing 1. Compared with the explosion-proof valve being installed on the cover plate, the explosion-proof valve 9 is directly installed on the housing 1, which can avoid the heat generated by welding the cover plate and the periphery of the housing 1 from affecting the explosion-proof valve 9.

[0040] like Figure 1 , Figure 2 and Figure 3 As shown, the battery also includes a base plate 5, and the housing 1 can be in the shape of a cuboid. The housing 1 has an opening on the side opposite to the mounting port in a predetermined direction L. The base plate 5 covers the opening, thereby sealing the receiving space. The base plate 5 and the housing 1 can be fixed by welding.

[0041] In embodiments of this application, the electrode group 2 includes two tabs 22, one of which is a positive electrode tab and the other is a negative electrode tab, such as... Figure 1 and Figure 2 As shown, there are two mounting ports, two pole posts 3, and two electrical connectors 4. The two mounting ports are located on the same side of the housing 1 in the predetermined direction L, and the two pole posts 3 are respectively set on the two mounting ports. The two pole posts 3 correspond to the two electrical connectors 4 respectively, and the electrical connectors 4 are fixed on the pole posts 3 corresponding to the electrical connectors 4. The two tabs 22 in the pole group 2 are respectively connected to the two pole posts 3.

[0042] Optionally, two pole groups 2 may be provided inside the housing 1, with the two positive tabs 22 of the two pole groups 2 connected to the same electrical connector 4, and the two negative tabs 22 of the two pole groups 2 connected to another electrical connector 4.

[0043] like Figure 4 and Figure 6 As shown, the battery also includes a welding component 6, which is disposed inside the accommodating space. The welding component 6 has a mounting hole 61 and a connecting hole 62, both of which extend along a predetermined direction L. The mounting hole 61 and the connecting hole 62 both penetrate through the welding component 6. A portion of the electrode post 3 extends into the mounting hole 61 and connects to the welding component 6. In this way, the electrode post 3 can be fixed by setting the welding component 6.

[0044] Preferably, the pole post 3 and the welding part 6 are fixed by laser welding.

[0045] In the embodiments of this application, such as Figure 4As shown, the pole post 3 includes a first conductive part 31, a second conductive part 32, a third conductive part 33, and a fourth conductive part 34 connected in sequence. Part of the first conductive part 31 is located within the receiving space and is connected to the welding part 6, while another part of the first conductive part 31 is located within the mounting opening. Part of the second conductive part 32 is located within the mounting opening, while another part is located outside the receiving space. The third conductive part 33 is located outside the receiving space, and the fourth conductive part 34 is also located outside the receiving space. A plane perpendicular to the predetermined direction L is defined as the reference plane S3. The orthographic projection of the first conductive part 31 along the predetermined direction L onto the reference plane S3 lies inside the projection of the second conductive part 32 along the predetermined direction L onto the reference plane S3. The projection of the second conductive part 32 along the predetermined direction L onto the reference plane S3 lies inside the projection of the third conductive part 33 onto the reference plane S3. The orthographic projection of the third conductive part 33 onto the reference plane S3 coincides with the orthographic projection of the fourth conductive part 34 onto the reference plane S3. In other words, the entire pole post 3 has a stepped structure. Compared to an electrode post that includes a base plate and an electrode post body, the electrode post 3 of this application can be formed in one step, reducing the processing cost of the electrode post 3.

[0046] Preferably, the pole post 3 is integrally formed.

[0047] like Figure 5 and Figure 6 As shown, the wall of the mounting hole 61 is divided into a mating surface S2 and a welding surface S1. The welding surface S1 is connected to the mating surface S2 at its first end in the predetermined direction L. The welding surface S1 is inclined towards the outside of the mounting hole 61 at its second end in the predetermined direction L. The first conductive part 31 of the pole post 3 is divided into a straight section 311 and an inclined section 312. The straight section 311 is mated to the mating surface S2, and the inclined section 312 is connected to the welding surface S1, thereby achieving the fixation between the pole post 3 and the welding part 6.

[0048] Optionally, the angle α between the welding surface S1 and the reference plane S3 is greater than or equal to 5 degrees and less than or equal to 75 degrees. For example, the angle α between the welding surface S1 and the reference plane S3 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.

[0049] Preferably, the second conductive part 32, the third conductive part 33, and the fourth conductive part 34 are all in the shape of a quadrangular prism, the straight section 311 of the first conductive part 31 is in the shape of a quadrangular prism, and the inclined section 312 of the first conductive part 31 is in the shape of a quadrangular frustum. Before the electrode post 3 is installed with the welding part 6, the first conductive part 31 is generally in the shape of a quadrangular prism. When the electrode post 3 is installed into the mounting hole 61, part of the first conductive part 31 is in contact with the mating surface S2, and there is a gap between the first conductive part 31 and the welding surface S1. Then the electrode post 3 can be riveted so that part of the first conductive part 31 is in contact with the welding surface S1. The part in contact with the welding surface S1 is the inclined section 312, and the other part is the straight section 311.

[0050] like Figure 5 As shown, the through hole 35 includes a first hole portion 351 and a second hole portion 352. The second hole portion 352 is connected to the first hole portion 351 on the side opposite to the receiving space in a predetermined direction L. The first hole portion 351 passes through the first conductive portion 31, the second conductive portion 32 and the third conductive portion 33. The second hole portion 352 passes through the fourth conductive portion 34. Both the first hole portion 351 and the second hole portion 352 are square holes. The diameter of the second hole portion 352 is larger than that of the first hole portion 352.

[0051] like Figure 3 As shown, the electrical connector 4 includes a first connecting portion 41 and a second connecting portion 42. Both the first connecting portion 41 and the second connecting portion 42 are cuboid in shape. The projection of the first connecting portion 41 along the predetermined direction L onto the reference plane S3 is located inside the projection of the second connecting portion 42 along the predetermined direction L onto the reference plane S3. That is, the area of ​​the cross-section of the first connecting portion 41 perpendicular to the predetermined direction L is smaller than the area of ​​the cross-section of the second connecting portion 42 perpendicular to the predetermined direction L. The first connecting portion 41 is disposed inside the first hole 351, and the second connecting portion 42 is disposed inside the second hole 352. The second connecting portion 42 is welded to the hole wall of the second hole 352. In this way, by disposing the first connecting portion 41 and the second connecting portion 42 in the first hole 351 and the second hole 352, which have different hole diameters, the stability of the electrical connector 4 during installation can be ensured.

[0052] Optionally, such as Figure 4 As shown, the housing 1 also includes a plastic component 7, which includes a support plate 71 and a surrounding plate 72. The support plate 71 is fitted to the outer wall of the housing 1, and the surrounding plate 72 surrounds the support plate 71. The support plate 71 has a connection port that communicates with the mounting port. A portion of the second conductive part 32 is located within the connection port. The side of the third conductive part 33 facing the second conductive part 32 abuts against the support plate 71, and the outer wall of the third conductive part 33 is fitted to the surrounding plate 72. A portion of the outer wall of the fourth conductive part 34 is fitted to the surrounding plate 72. Thus, by providing the plastic component 7, insulation between the electrode post 3 and the housing 1 can be achieved.

[0053] In the embodiments of this application, such as Figure 4 As shown, the housing 1 also includes a sealing element 8, which includes a first sealing portion 81. The first sealing element 8 can be a hollow structure in the shape of a cuboid. The first sealing portion 81 includes a first sealing surface and a second sealing surface that are opposite to each other in a predetermined direction L. The first sealing surface is in contact with the welded part 6, a part of the second sealing surface is in contact with the second conductive part 32, and another part of the second sealing surface is in contact with the inner sidewall of the housing 1, thereby achieving a seal between the welded part 6 and the housing 1, and between the welded part 6 and the pole post 3.

[0054] Furthermore, the seal 8 also includes a second sealing part 82, which can be a hollow structure in the shape of a cuboid. The second sealing part 82 is connected to the second sealing surface and is located between the inner wall of the mounting port and the second conductive part 32, thereby achieving a seal between the pole post 3 and the housing 1.

[0055] 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 a casing, electrode assembly, terminal posts, and electrical connectors. The casing encloses an accommodating space and has an installation opening that communicates with the accommodating space. The electrode post is disposed on the mounting port, and the electrode post has a through hole. The through hole penetrates the electrode post in a predetermined direction and communicates with the receiving space. The electrical connector is connected to the inner wall of the through hole to close the end of the through hole facing away from the receiving space in the predetermined direction. The electrode assembly includes an electrode assembly body and an electrode tab, the electrode tab extending into the through hole and connected to the electrical connector.

2. The battery according to claim 1, characterized in that, The battery also includes a welding component disposed inside the receiving space. The welding component has a mounting hole that extends along the predetermined direction. A portion of the electrode post extends into the mounting hole and is connected to the welding component.

3. The battery according to claim 2, characterized in that, The pole post includes a first conductive part, a second conductive part, and a third conductive part connected in sequence. The first conductive part is connected to the welded part. A portion of the second conductive part is located inside the mounting opening, and the third conductive part is located outside the receiving space. A plane perpendicular to the predetermined direction is defined as a reference plane, and the projection of the second conductive part on the reference plane along the predetermined direction is located inside the projection of the third conductive part on the reference plane.

4. The battery according to claim 3, characterized in that, The battery also includes a plastic component that is fitted to the outer wall of the housing. The plastic component has a connection port that communicates with the mounting port. A portion of the second conductive part is located inside the connection port, and the side of the third conductive part facing the second conductive part abuts against the plastic component.

5. The battery according to claim 3, characterized in that, The through hole includes a first hole and a second hole, wherein the second hole communicates with the side of the first hole facing away from the receiving space in the predetermined direction; The electrical connector includes a first connecting portion and a second connecting portion. The projection of the first connecting portion along the predetermined direction onto the reference plane is located inside the projection of the second connecting portion along the predetermined direction onto the reference plane. The first connecting portion is disposed inside the first hole, and the second connecting portion is disposed inside the second hole.

6. The battery according to claim 3, characterized in that, The wall of the mounting hole is divided into a welding surface and a mating surface. The welding surface is connected to the mating surface at a first end in a predetermined direction, and the welding surface is inclined toward the outside of the mounting hole at a second end in the predetermined direction. The pole post is connected to the welding surface.

7. The battery according to claim 6, characterized in that, 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.

8. The battery according to claim 3, characterized in that, The housing further includes a sealing element, which includes a first sealing portion. The first sealing portion includes a first sealing surface and a second sealing surface that are opposite to each other in the predetermined direction. The first sealing surface is in contact with the welded part, a portion of the second sealing surface is in contact with the second conductive part, and another portion of the second sealing surface is in contact with the inner sidewall of the housing.

9. The battery according to claim 8, characterized in that, The sealing element further includes a second sealing part, which is connected to the second sealing surface and is located between the inner wall of the mounting port and the second conductive part.

10. The battery according to any one of claims 1-9, characterized in that, The number of the mounting port, the pole post, and the electrical connector are all two. The two mounting ports are located on the same side of the housing in the predetermined direction, and the two pole posts are respectively disposed on the two mounting ports. The two poles correspond to two electrical connectors, and the electrical connectors are fixed on the poles corresponding to the electrical connectors.

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