Battery assembly

Abstract

The utility model discloses a battery assembly. The battery assembly comprises a battery shell, battery poles, pole leading-out terminals and battery tabs, the pole leading-out terminal is assembled on the upper surface of the battery pole and abuts against the battery pole to form a first welding area for welding the pole leading-out terminal and the battery pole; the battery pole lug is arranged in the battery shell, and a second welding area is arranged on the lower surface of the battery pole column and is used for welding the battery pole lug and the battery pole column; and the projection of the first welding area in the axial direction of the battery pole is not overlapped with the projection of the second welding area in the axial direction of the battery pole. According to the battery assembly, the first welding area and the second welding area are arranged on the battery pole, so that the welding spot of the outer pole leading-out terminal and the welding spot of the inner battery pole lug can be prevented from overlapping in the axial direction of the pole, and the welding penetration phenomenon in the welding process can be prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a battery assembly. Background Art

[0002] A battery generally consists of a battery shell, battery contents arranged in the shell, a battery pole and a battery cover. The battery cover and the shell form a closed space for accommodating the battery contents. The battery pole is arranged at the battery cover to connect the inside and outside of the battery and transmit electrical energy. Due to application requirements, some batteries usually weld the pole lead-out terminal at one end of the battery pole to facilitate the connection of external lines. Since the other end of the battery pole also needs to be welded to the battery pole ear in the battery contents, and the pole itself is relatively thin and fragile, welding at both ends is prone to overlap of the internal and external welds, causing welding penetration, affecting the welding quality and battery quality. Utility Model Content

[0003] The embodiment of the utility model provides a battery assembly to solve the problem that when a pole lead-out terminal is welded to a battery pole, inner and outer welding points are easily overlapped and cause welding through.

[0004] The utility model provides a battery assembly, including a battery housing, a battery pole, a pole lead-out terminal and a battery pole ear, wherein the battery pole is mounted on the battery housing 1. The upper end of the battery pole extends out of the battery housing for connecting the pole lead-out terminal;

[0005] The pole lead-out terminal is mounted on the upper surface of the battery pole and abuts against the battery pole to form a first welding area for welding the pole lead-out terminal and the battery pole;

[0006] The battery tab is arranged in the battery housing, and the lower surface of the battery pole is provided with a second welding area for welding the battery tab and the battery pole;

[0007] A projection of the first welding area in the axial direction of the battery pole does not overlap with a projection of the second welding area in the axial direction of the battery pole.

[0008] Preferably, the battery pole comprises a pole body and a boss structure extending upwardly from an upper surface of the pole body in an axial direction;

[0009] The pole lead-out terminal is sleeved on the boss structure, and a first welding area is formed at the abutment between the pole lead-out terminal and the boss structure, which is used for welding the pole lead-out terminal and the battery pole;

[0010] A second welding area is provided on the lower surface of the pole body, and the second welding area is arranged opposite to the boss structure and is used for welding the battery tab.

[0011] Preferably, the boss structure comprises a first boss extending from the upper surface of the pole body in the axial direction, a second boss extending from the upper surface of the first boss in the axial direction, and a third boss extending from the upper surface of the second boss in the axial direction;

[0012] The pole lead terminal is sleeved on the third boss and abuts against the upper surface of the second boss, and the first welding area is formed at the abutment between the pole lead terminal and the second boss;

[0013] The second welding area is provided on the lower surface of the pole body at a position opposite to the third boss.

[0014] Preferably, the battery assembly further comprises an insulating sheet;

[0015] The insulating sheet is sleeved on the second boss and abuts against the upper surface of the first boss and the outer surface of the battery housing.

[0016] Preferably, the battery assembly further comprises an insulating layer;

[0017] The insulating layer is sleeved on the first boss and abuts against the upper surface of the pole body and the battery housing.

[0018] Preferably, the insulating layer comprises a first connecting portion and a second connecting portion extending from an upper surface of the first connecting portion in an axial direction;

[0019] The second connecting portion is sleeved outside the first boss, and the outer wall of the second connecting portion abuts against the battery housing;

[0020] The upper surface of the first connection portion abuts against the inner surface of the battery case, and the lower surface of the first connection portion abuts against the upper surface of the electrode body.

[0021] Preferably, the first welding area is provided with at least one welding path, and the welding path is arranged around the third boss.

[0022] Preferably, the pole lead terminal comprises a welding portion and a lead portion extending from one side of the welding portion in a radial direction;

[0023] The welding portion is provided with a connecting through hole, which is used to be sleeved on the third boss and abut against the upper surface of the second boss to form the first welding area.

[0024] Preferably, the lead-out portion comprises a first connecting piece extending from one side of the welding portion in a radial direction of the welding portion, a second connecting piece extending from an end of the first connecting piece in an axial direction of the welding portion, and a third connecting piece extending from an end of the second connecting piece in a radial direction of the welding portion;

[0025] The lower surface of the first connecting sheet abuts against the insulating sheet;

[0026] The third connecting piece is used to connect to an external circuit.

[0027] Preferably, the pole lead-out terminal is made of nickel.

[0028] The battery assembly provided by the embodiment of the utility model can avoid the overlap of the welding points of the outer electrode lead-out terminal and the inner battery electrode ear in the axial direction of the electrode by arranging the first welding area and the second welding area on the battery electrode, and making the projections of the two welding areas in the axial direction of the battery electrode non-overlapping, thereby preventing the welding through phenomenon from occurring during the welding process. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the description of the embodiments of the utility model will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0030] Figure 1 It is a cross-sectional structural schematic diagram of a battery assembly in one embodiment of the utility model;

[0031] Figure 2 It is a structural schematic diagram of a pole lead-out terminal in one embodiment of the utility model;

[0032] Figure 3 It is a three-dimensional structural schematic diagram of a battery assembly in one embodiment of the utility model.

[0033] In the figure: 1. battery case; 2. battery pole; 21. pole body; 22. boss structure; 221. first boss; 222. second boss; 223. third boss 3. pole lead terminal; 31. welding part; 32. lead part; 321. first connecting piece; 322. second connecting piece; 323. third connecting piece; 4. battery ear; 5. first welding area; 51. welding path; 6. second welding area; 7. insulating sheet; 8. insulating layer; 81. first connecting part; 82. second connecting part. DETAILED DESCRIPTION

[0034] In order to make the technical problems, technical solutions and beneficial effects solved by the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0035] In the description of the present invention, it should be understood that the terms "longitudinal", "radial", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0036] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] The utility model embodiment provides a battery assembly, including a battery shell 1, a battery pole 2, a pole lead-out terminal 3 and a battery pole ear 4, the battery pole 2 is assembled on the battery shell 1, and the upper end of the battery pole 2 extends out of the battery shell 1, which is used to connect the pole lead-out terminal 3; the pole lead-out terminal 3 is assembled at the upper surface of the battery pole 2, and abuts against the battery pole 2 to form a first welding area 5, which is used to weld the pole lead-out terminal 3 and the battery pole 2; the battery pole ear 4 is arranged in the battery shell 1, and the lower surface of the battery pole 2 is provided with a second welding area 6, which is used to weld the battery pole ear 4 and the battery pole 2; the projection of the first welding area 5 in the axial direction of the battery pole 2 does not overlap with the projection of the second welding area 6 in the axial direction of the battery pole 2.

[0038] As an example, Figure 1As shown, the battery assembly includes a battery housing 1, a battery pole 2, a pole lead-out terminal 3 and a battery pole lug 4. The pole lead-out terminal 3 is used to connect the battery pole 2 and the external circuit to facilitate the arrangement and management of the battery. The battery pole 2 is assembled on the battery housing 1, and the battery pole 2 can be a cylindrical or square structure. The pole lead-out terminal 3 is assembled on the upper surface of the battery pole 2, and abuts against the battery pole 2 to form a first welding area 5. The pole lead-out terminal 3 and the battery pole 2 are penetrated and welded in the first welding area 5, and the pole lead-out terminal 3 can be fixed on the battery pole 2, and an electrical connection is formed between the two. A second welding area 6 is provided on the lower surface of the battery pole 2, which is used to weld with the battery pole lug 4 inside the battery housing 1. The battery pole lug 4 can be welded in the second welding area 6 by penetration welding, so that an electrical connection is formed between the battery pole lug 4 and the battery pole 2. By setting up the first welding area 5 and the second welding area 6 separately and making the projections of the two welding areas in the axial direction of the battery pole 2 not overlap each other, it is possible to avoid the welding points of the external pole lead-out terminal 3 and the welding points of the internal battery pole ear 4 from overlapping in the axial direction of the battery pole 2, thereby preventing the occurrence of welding penetration during the welding process.

[0039] In one embodiment, the battery pole 2 includes a pole body 21 and a boss structure 22 extending from the upper surface of the pole body 21 in an axial direction; the pole lead-out terminal 3 is sleeved on the boss structure 22, and a first welding area 5 is formed at the junction of the pole lead-out terminal 3 and the boss structure 22, which is used to weld the pole lead-out terminal 3 and the battery pole 2; a second welding area 6 is provided on the lower surface of the pole body 21, and the second welding area 6 is arranged opposite to the boss structure 22, which is used to weld the battery pole ear 4.

[0040] As an example, Figure 1 As shown, the battery pole 2 includes a pole body 21 and a boss structure 22 extending upward from the upper surface of the pole body 21. The pole lead terminal 3 is sleeved on the boss structure 22, and the abutment portion with the boss structure 22 forms a first welding area 5. The pole lead terminal 3 and the boss structure 22 are penetrated and welded in the first welding area 5, so that the pole lead terminal 3 can be fixed on the boss structure 22 and an electrical connection is formed between the two. The boss structure 22 that matches the pole lead terminal 3 is provided on the battery pole 2, which is conducive to positioning the pole lead terminal 3 and facilitating the next welding operation. A second welding area 6 is provided on the lower surface of the pole body 21 for welding with the battery pole ear 4 inside the battery housing 1, and the second welding area 6 is arranged opposite to the boss structure 22. By setting up the first welding area 5 and the second welding area 6 separately and making the projections of the two welding areas in the axial direction of the battery pole 2 not overlap each other, it is possible to avoid the welding points of the external pole lead-out terminal 3 and the welding points of the internal battery pole ear 4 from overlapping in the axial direction of the battery pole 2, thereby preventing the occurrence of welding penetration during the welding process.

[0041] In one embodiment, the boss structure 22 includes a first boss 221 extending from the upper surface of the pole body 21 in the axial direction, a second boss 222 extending from the upper surface of the first boss 221 in the axial direction, and a third boss 223 extending from the upper surface of the second boss 222 in the axial direction; the pole lead-out terminal 3 is sleeved on the third boss 223 and abuts against the upper surface of the second boss 222; a first welding area 5 is formed at the abutment between the pole lead-out terminal 3 and the second boss 222; a second welding area 6 is provided at a position relative to the lower surface of the pole body 21 and the third boss 223.

[0042] As an example, the boss structure 22 includes a first boss 221 extending upward from the upper surface of the pole body 21, a second boss 222 extending upward from the upper surface of the first boss 221, and a third boss 223 extending upward from the upper surface of the second boss 222. The pole lead terminal 3 is sleeved on the third boss 223 and abuts against the upper surface of the second boss 222, so that the third boss 223 is inserted into the pole lead terminal 3, and the upper surface of the third boss 223 is flush with the upper surface of the pole lead terminal 3. The lower surface of the pole lead terminal 3 abuts against the second boss 222 to form a first welding area 5, and the first welding area 5 can be penetrated and welded from the upper surface of the pole lead terminal 3, so that the abutment between the pole lead terminal 3 and the second boss 222 is tightly combined with each other, and an electrical connection is formed between the two.

[0043] In one embodiment, the battery assembly further includes an insulating sheet 7 ; the insulating sheet 7 is sleeved on the second boss 222 and abuts against the upper surface of the first boss 221 and the outer surface of the battery housing 1 .

[0044] As an example, the battery assembly also includes an insulating sheet 7, which is sleeved on the second boss 222 and abuts against the upper surface of the first boss 221 and the outer surface of the battery shell 1, and is used to isolate the battery shell 1 and the pole lead-out terminal 3, thereby playing an insulating role between the pole lead-out terminal 3 and the battery shell 1.

[0045] In one embodiment, the battery assembly further includes an insulating layer 8 ; the insulating layer 8 is sleeved on the first boss 221 and abuts against the upper surface of the pole body 21 and the battery housing 1 .

[0046] As an example, the battery assembly also includes an insulating layer 8, which is sleeved on the first boss 221 and abuts against the upper surface of the pole body 21 and the battery shell 1, and is used to isolate the battery pole 2 and the battery shell 1, thereby playing an insulating and sealing role between the battery pole 2 and the battery shell 1.

[0047] In one embodiment, the insulating layer 8 includes a first connecting portion 81 and a second connecting portion 82 extending from the upper surface of the first connecting portion 81 in an axial direction; the second connecting portion 82 is sleeved outside the first boss 221, and the outer wall of the second connecting portion 82 abuts against the battery housing 1; the upper surface of the first connecting portion 81 abuts against the inner surface of the battery housing 1, and the lower surface of the first connecting portion 81 abuts against the upper surface of the pole body 21.

[0048] As an example, the insulating layer 8 includes a first connecting portion 81 and a tubular second connecting portion 82 extending from the upper surface of the first connecting portion 81 in an axial direction. The second connecting portion 82 is sleeved outside the first boss 221 and penetrates the battery shell 1. Its outer wall abuts against the battery shell 1, forming an interference fit with the battery shell 1 to play a sealing role. The upper surface of the first connecting portion 81 abuts against the inner surface of the battery shell 1, and the lower surface of the first connecting portion 81 abuts against the upper surface of the pole body 21. The first connecting portion 81 and the second connecting portion 82 cooperate to isolate the battery pole 2 from the battery shell 1, thereby playing an insulating and sealing role.

[0049] In one embodiment, the first welding area 5 is provided with at least one welding path 51 , and the welding path 51 is disposed around the third boss 223 .

[0050] As an example, the first welding area 5 is provided with at least one welding path 51, and the welding path 51 can be a linear groove arranged around the third boss 223 and opened on the upper surface of the pole lead terminal 3. By opening the welding path 51 on the pole lead terminal 3, the welding portion 31 can be thinned, which is convenient for penetration welding and also helps to determine the welding position. Figure 2 As shown, taking the battery pole 2 as a cylindrical shape as an example, the welding path 51 can be a whole section of a continuous arc arranged around the third boss 223, or the welding path 51 can also be a plurality of discontinuous arcs arranged around the third boss 223.

[0051] In one embodiment, the pole lead-out terminal 3 includes a welding portion 31 and a lead-out portion 32 extending from one side of the welding portion 31 in a radial direction; the welding portion 31 is provided with a connecting through hole for being sleeved on the third boss 223 and abutting against the upper surface of the second boss 222 to form a first welding area 5.

[0052] As an example, the pole lead-out terminal 3 includes a welding portion 31 and a lead-out portion 32 extending from one side of the welding portion 31 in a radial direction. The welding portion 31 is provided with a connecting through hole, and the third boss 223 is passed through the through hole to facilitate the installation and positioning between the pole lead-out terminal 3 and the third boss 223. The lower surface of the welding portion 31 abuts against the upper surface of the second boss 222 to form a first welding area 5 arranged around the third boss 223.

[0053] In one embodiment, the lead-out portion 32 includes a first connecting piece 321 extending from one side of the welding portion 31 along the radial direction of the welding portion 31, a second connecting piece 322 extending from the end of the first connecting piece 321 along the axial direction of the welding portion 31, and a third connecting piece 323 extending from the end of the second connecting piece 322 along the radial direction of the welding portion 31; the lower surface of the first connecting piece 321 abuts against the insulating sheet 7; the third connecting piece 323 is used to connect an external circuit.

[0054] As an example, the lead-out portion 32 includes a first connecting piece 321 extending from one side of the welding portion 31 along the radial direction of the welding portion 31, a second connecting piece 322 extending from the end of the first connecting piece 321 along the axial direction of the welding portion 31, and a third connecting piece 323 extending from the end of the second connecting piece 322 along the radial direction of the welding portion 31. The lower surface of the first connecting piece 321 abuts against the insulating sheet 7, so that the body of the first connecting piece 321 can be closely attached to the upper surface of the insulating sheet 7 without additionally increasing the height of the battery. The third connecting piece 323 is used to connect an external circuit, and cooperates with the second connecting portion 82 to adapt to a variety of wiring scenarios, and facilitates the stacking and arrangement of batteries.

[0055] In one embodiment, the pole lead terminal 3 is made of nickel.

[0056] As an example, the pole lead-out terminal 3 is preferably made of nickel, which can make the pole lead-out terminal 3 have good corrosion resistance and ductility, and is convenient for processing and forming.

[0057] The embodiments described above are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention, and should be included in the protection scope of the present invention.

Claims

1. A battery assembly, characterized in that: It comprises a battery housing, a battery pole, a pole lead-out terminal and a battery pole ear, wherein the battery pole is mounted on the battery housing, and the upper end of the battery pole extends out of the battery housing for connecting the pole lead-out terminal; The pole lead-out terminal is mounted on the upper surface of the battery pole and abuts against the battery pole to form a first welding area for welding the pole lead-out terminal and the battery pole; The battery tab is arranged in the battery housing, and the lower surface of the battery pole is provided with a second welding area for welding the battery tab and the battery pole; A projection of the first welding area in the axial direction of the battery pole does not overlap with a projection of the second welding area in the axial direction of the battery pole.

2. The battery assembly according to claim 1, characterized in that: The battery pole comprises a pole body and a boss structure extending upwardly from the upper surface of the pole body in an axial direction; The pole lead-out terminal is sleeved on the boss structure, and a first welding area is formed at the abutment between the pole lead-out terminal and the boss structure, which is used for welding the pole lead-out terminal and the battery pole; A second welding area is provided on the lower surface of the pole body, and the second welding area is arranged opposite to the boss structure and is used for welding the battery tab.

3. The battery assembly according to claim 2, characterized in that: The boss structure comprises a first boss extending from the upper surface of the pole body in the axial direction, a second boss extending from the upper surface of the first boss in the axial direction, and a third boss extending from the upper surface of the second boss in the axial direction; The pole lead terminal is sleeved on the third boss and abuts against the upper surface of the second boss, and the first welding area is formed at the abutment between the pole lead terminal and the second boss; The second welding area is provided on the lower surface of the pole body at a position opposite to the third boss.

4. The battery assembly according to claim 3, characterized in that: The battery assembly also includes an insulating sheet; The insulating sheet is sleeved on the second boss and abuts against the upper surface of the first boss and the outer surface of the battery housing.

5. The battery assembly according to claim 3, characterized in that: The battery assembly also includes an insulating layer; The insulating layer is sleeved on the first boss and abuts against the upper surface of the pole body and the battery housing.

6. The battery assembly according to claim 5, characterized in that: The insulating layer includes a first connecting portion and a second connecting portion extending from an upper surface of the first connecting portion in an axial direction; The second connecting portion is sleeved outside the first boss, and the outer wall of the second connecting portion abuts against the battery housing; The upper surface of the first connection portion abuts against the inner surface of the battery case, and the lower surface of the first connection portion abuts against the upper surface of the electrode body.

7. The battery assembly according to claim 3, characterized in that: The first welding area is provided with at least one welding path, and the welding path is arranged around the third boss.

8. The battery assembly according to claim 4, characterized in that: The pole lead terminal comprises a welding portion and a lead portion extending from one side of the welding portion in a radial direction; The welding portion is provided with a connecting through hole, which is used to be sleeved on the third boss and abut against the upper surface of the second boss to form the first welding area.

9. The battery assembly according to claim 8, characterized in that: The lead-out portion includes a first connecting piece extending from one side of the welding portion in a radial direction of the welding portion, a second connecting piece extending from a terminal end of the first connecting piece in an axial direction of the welding portion, and a third connecting piece extending from a terminal end of the second connecting piece in a radial direction of the welding portion; The lower surface of the first connecting sheet abuts against the insulating sheet; The third connecting piece is used to connect to an external circuit.

10. The battery assembly according to claim 1, characterized in that: The pole lead-out terminal is made of nickel.

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