Battery cell pole mounting assembly and battery cell

Abstract

The utility model relates to the technical field of batteries, and provides a battery cell pole mounting assembly and a battery cell, the battery cell pole mounting assembly comprises an end cover, a pole and a pole sleeve; the end cover covers one end of the battery cell and is provided with a through hole; an outer convex column section with the diameter smaller than that of the pole is formed at one end of the pole, and at least part of the outer convex column section is inserted into the through hole; the polar column sleeve is sleeved on the periphery of the outer convex column section; a concave ring groove is formed in one end, back to the end cover, of the pole sleeve; and one end, back to the end cover, of the outer convex column section is riveted to form a power connection part filled in the concave ring groove. The battery cell comprises the battery cell pole mounting assembly, the effective welding area of the pole and the bus bar can be increased by the battery cell pole mounting assembly and the bus bar, the overcurrent capacity of the pole and the bus bar is enhanced, and the problems of small welding area and weak overcurrent capacity of the battery cell convex section of the battery cell pole in the prior art are effectively solved.

Description

Technical Field

[0001] The present disclosure relates to the field of battery technology, and in particular to a battery cell pole installation assembly and a battery cell. Background Art

[0002] In the prior art, one end of the pole of the battery cell is generally protruding, so that the poles in multiple battery cells can be connected in parallel through unified welding of busbars, for example Figure 1 The figure shows a vertical cross-sectional view of a conventional installation structure of a battery cell pole in the prior art. However, the battery cell pole of this conventional structure has the following disadvantages: (1) the outer protruding section 11 of the battery cell 1 has a relatively small diameter, a smaller welding area with the busbar, and a weak current carrying capacity; (2) the outer protruding section 11 of the battery cell 1 and the pole sleeve 2 are extruded and assembled, the contact area between the two is small, the internal resistance is high, and the assembly may become loose after long-term use.

[0003] Therefore, there is an urgent need for a new type of battery cell pole installation structure on the market to solve the problems of small diameter of the outer convex section of the battery cell, small welding area and weak current carrying capacity of the battery cell pole in the prior art. Utility Model Content

[0004] The disclosed embodiments provide a battery cell pole installation assembly and a battery cell, in order to solve the problems of a battery cell pole in the prior art, such as a small diameter of a battery cell outer convex section, a small welding area, and a weak current carrying capacity.

[0005] The battery cell pole installation assembly provided in the embodiment of the present disclosure includes an end cover, a pole and a pole sleeve;

[0006] The end cover is arranged on one end of the battery core and is provided with a through hole;

[0007] One end of the pole forms an outer convex column section with a diameter smaller than that of the pole, and the outer convex column section is at least partially inserted into the through hole;

[0008] The pole sleeve is sleeved on the outer periphery of the outer convex column section;

[0009] Wherein, a concave annular groove is formed on one end of the pole sleeve facing away from the end cover;

[0010] One end of the outer convex column section facing away from the end cover is riveted to form a power connection portion which is filled in the concave annular groove.

[0011] In one possible implementation manner, a limiting portion is further provided in the recessed annular groove;

[0012] The limiting portion can be fixedly limited with the outer boss segment along the axial direction and radial direction of the outer boss segment.

[0013] In one possible implementation, the recessed annular groove includes an annular cylinder wall parallel to the outer convex column segment, and an annular surface wall parallel to the outer convex column segment;

[0014] The limiting portion comprises an annular limiting convex edge protruding from the annular cylinder wall or the annular surface wall;

[0015] An annular matching groove adapted to the annular limiting convex edge is correspondingly provided in the power connection part.

[0016] In one possible implementation, the recessed annular groove includes an annular cylinder wall parallel to the outer convex column segment, and an annular surface wall parallel to the outer convex column segment;

[0017] The limiting portion comprises an annular limiting groove recessed in the annular cylinder wall or the annular surface wall;

[0018] The power connection portion is provided with an annular matching edge which is matched with the annular limiting groove.

[0019] In one possible implementation, the recessed annular groove includes an annular cylinder wall parallel to the outer convex column segment, and an annular surface wall parallel to the outer convex column segment;

[0020] At least one of the limiting portions is provided in the annular cylinder wall and the annular surface wall, respectively, and the limiting portion comprises an annular limiting convex edge or an annular limiting groove.

[0021] In one possible implementation, the cross-sectional shape of the annular limiting protrusion is trapezoidal or semicircular.

[0022] In one possible implementation, the cross-sectional shape of the annular limiting groove is trapezoidal or semicircular.

[0023] In one possible implementation manner, the battery cell pole installation assembly further includes a mounting sleeve;

[0024] The inner wall of the installation sleeve is sleeved and abutted against the outer convex column section, and the outer wall of the installation sleeve is plugged and abutted against the through hole;

[0025] And an end surface of the installation sleeve facing away from the end cover is butted against the pole sleeve.

[0026] In one possible implementation manner, the battery cell pole mounting assembly further includes a sealing gasket;

[0027] The inner wall of the sealing gasket is sleeved and abuts against the outer convex column section, and is completely located at the lower side of the through hole;

[0028] The lower end surface of the sealing gasket is pressed and abutted by the pole, and the upper end surface is pressed and abutted by the end cover and the mounting sleeve.

[0029] In addition, the embodiment of the present disclosure further provides a battery cell, which includes a battery cell body and the above-mentioned battery cell pole installation assembly;

[0030] The pole is arranged inside the battery cell body, and the outer convex column section is at least partially located outside the battery cell body.

[0031] Compared with the prior art, the technical solution provided by the embodiments of the present disclosure has the following advantages:

[0032] The battery cell pole installation assembly provided by the disclosed embodiment opens a recessed annular groove at the end of the pole sleeve facing away from the end cover, and rivets the end of the outer convex column section facing away from the end cover so that it is deformed and filled in the recessed annular groove, and forms a power connection portion with a larger end face, thereby increasing the effective welding area of ​​the pole and the busbar and enhancing the current carrying capacity of the two, effectively solving the problem of small welding area and weak current carrying capacity of the outer convex section of the battery cell pole in the prior art.

[0033] In addition, the battery cell provided in the embodiment of the present disclosure includes the above-mentioned battery cell pole installation assembly, which can achieve the same beneficial effects.

[0034] It should be understood that the content described in this section is not intended to identify the key or important features of the embodiments of the present disclosure, nor is it intended to limit the scope of the present disclosure. Other features of the present disclosure will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The above and other objects, features and advantages of the exemplary embodiments of the present disclosure will become readily understood by reading the detailed description below with reference to the accompanying drawings. In the accompanying drawings, several embodiments of the present disclosure are shown in an exemplary and non-limiting manner, in which:

[0036] In the drawings, the same or corresponding reference numerals represent the same or corresponding parts.

[0037] Figure 1 A vertical cross-sectional view of a conventional installation structure of a battery cell pole in the prior art is shown;

[0038] Figure 2 A vertical cross-sectional view of a battery cell pole installation assembly provided by an embodiment of the present disclosure is shown;

[0039] Figure 3 A vertical cross-sectional view showing a second structure of a battery cell pole installation assembly provided by an embodiment of the present disclosure;

[0040] Figure 4 A vertical cross-sectional view of a third structure of a battery cell pole installation assembly provided by an embodiment of the present disclosure is shown;

[0041] Figure 5A vertical cross-sectional view showing a fourth structure of a battery cell pole installation assembly provided by an embodiment of the present disclosure;

[0042] Figure 6 A vertical cross-sectional view of a fifth structure of a battery cell pole mounting assembly provided in an embodiment of the present disclosure is shown.

[0043] Explanation of the numbers in the figure: 1, pole; 11, outer convex column section; 111, power connection part; 2, pole sleeve; 21, recessed ring groove; 211, limit part; 3, installation sleeve; 4, sealing gasket; 5, end cover. DETAILED DESCRIPTION

[0044] In order to make the purpose, features, and advantages of the present disclosure more obvious and easy to understand, the technical solutions in the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings in the embodiments of the present disclosure. Obviously, the described embodiments are only part of the embodiments of the present disclosure, not all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present disclosure.

[0045] The embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings.

[0046] Combination Figure 2 As shown, the embodiment of the present disclosure provides a battery cell pole installation assembly, which includes an end cover 5, a pole 1 and a pole sleeve 2; the end cover 5 is arranged to cover one end of the battery cell and is provided with a through hole; an outer convex column section 11 having a diameter smaller than that of the pole 1 is formed at one end of the pole 1, and the outer convex column section 11 is at least partially inserted into the through hole; the pole sleeve 2 is sleeved on the outer periphery of the outer convex column section 11;

[0047] The end of the pole sleeve 2 facing away from the end cover 5 is provided with a recessed annular groove 21 ; the end of the outer convex column section 11 facing away from the end cover 5 is riveted to form a power connection portion 111 which is filled in the recessed annular groove 21 .

[0048] When the battery cell pole installation assembly is specifically assembled, the outer convex column section 11 in the pole 1 is first inserted into the through hole of the end cover 5 from the inside to the outside, and then the pole sleeve 2 is sleeved on the outer periphery of the outer convex column section 11. At this time, since a recessed annular groove 21 is provided at the end of the pole sleeve 2 facing away from the end cover 5, a temporary installation gap can be formed between the pole sleeve 2 and the end of the outer convex column section 11 facing away from the end cover 5. Then, the end of the outer convex column section 11 facing away from the end cover 5 is riveted and pressed, so that the end of the outer convex column section 11 facing away from the end cover 5 is filled in the recessed annular groove 21, so that the end of the outer convex column section 11 facing away from the end cover 5 can form a larger diameter power connection portion 111.

[0049] On the one hand, the power connection part 111 in the outer convex column section 11 can buckle and position the pole sleeve 2 to improve the installation reliability of the pole 1 and the pole sleeve 2. On the other hand, when the power connection part 111 is welded to the bus bar, it can also increase the effective welding area with the bus bar and enhance the current carrying capacity of the two.

[0050] In summary, Figure 1 Compared with the conventional structure of the battery cell pole in the prior art, the battery cell pole installation assembly provided by the embodiment of the present invention has a recessed annular groove 21 opened at the end of the pole sleeve 2 facing away from the end cover 5, and the end of the outer convex column section 11 facing away from the end cover 5 is riveted so that it is deformed and filled in the recessed annular groove 21, and a power connection portion 111 with a larger end face is formed, thereby increasing the effective welding area between the pole 1 and the bus bar and enhancing the current carrying capacity of the two, effectively solving the problem of small welding area and weak current carrying capacity of the outer convex section of the battery cell pole in the prior art.

[0051] In one embodiment, a limiting portion 211 is further provided in the recessed annular groove 21 ; the limiting portion 211 can be fixed to the outer boss segment 11 in an axial direction and a radial direction thereof.

[0052] Specific, combined Figure 3 To further explain in detail, a limiting portion 211 is further provided in the recessed annular groove 21 , and the limiting portion 211 can be specifically but not limited to being provided as a raised structure or a recessed structure, for example, provided as a raised edge, a raised head, a recessed groove, a recessed hole, etc.

[0053] By providing the above-mentioned limiting portion 211, when the end of the outer boss segment 11 facing away from the end cover 5 is riveted, the deformation produced will correspondingly avoid or fill the limiting portion 211. After the outer boss segment 11 is finally formed, the limiting portion 211 can further limit and fix the outer boss segment 11 to the recessed annular groove 21 in its own axial and radial directions.

[0054] The specific arrangement of the limiting portion 211 has the beneficial effects of being simple in structure and being able to further improve the installation stability of the outer boss segment 11 in the recessed annular groove 21 .

[0055] In one embodiment, the recessed annular groove 21 includes an annular cylinder wall parallel to the outer convex column segment 11, and an annular surface wall parallel to the outer convex column segment 11; the limiting portion 211 includes an annular limiting convex edge protruding from the annular cylinder wall or the annular surface wall; and the power connection portion 111 is correspondingly provided with an annular matching groove adapted to the annular limiting convex edge.

[0056] Specific, combined Figure 3 and Figure 4 For further details, Figure 3 Specifically, the limiting portion 211 is configured as an annular limiting convex edge protruding from the annular surface wall of the concave annular groove 21; Figure 4Specifically, the limiting portion 211 is configured as an annular limiting convex edge protruding from the annular cylinder wall in the concave annular groove 21. The above two different annular convex edge structures can fully limit the outer boss segment 11 in the axial direction and radial direction.

[0057] Moreover, the cross-sectional shape of the annular limiting convex edge can be specifically set to be an isosceles trapezoid or a semicircle, so that when the outer convex column segment 11 is riveted, it can be more conducive to its deformation to avoid the limiting portion 211.

[0058] Of course, the cross-sectional shape of the annular limiting protrusion may also be set to other shapes, such as a triangle, a U shape, etc.

[0059] In one embodiment, the recessed annular groove 21 includes an annular cylinder wall parallel to the outer convex column segment 11, and an annular surface wall parallel to the outer convex column segment 11; the limiting portion 211 includes an annular limiting groove recessed in the annular cylinder wall or the annular surface wall; and the power connection portion 111 is correspondingly provided with an annular matching edge adapted to the annular limiting groove.

[0060] Specific, combined Figure 5 To further explain in detail, at this time, the limiting portion 211 is specifically configured as an annular limiting groove recessed in the annular cylinder wall in the recessed annular groove 21 , and the structure of the annular groove can also fully limit the outer boss segment 11 along the axial and radial directions.

[0061] Moreover, the cross-sectional shape of the annular limiting groove can be specifically set to be an isosceles trapezoid, so that when the outer boss section 11 is riveted, it can also be more conducive to its deformation to avoid the limiting portion 211.

[0062] Of course, the cross-sectional shape of the annular limiting groove may also be set to other shapes, such as a triangle, a U shape, etc.

[0063] In one embodiment, the recessed annular groove 21 includes an annular cylinder wall parallel to the outer convex column segment 11, and an annular surface wall parallel to the outer convex column segment 11; at least one limiting portion 211 is respectively provided in the annular cylinder wall and the annular surface wall, and the limiting portion 211 includes an annular limiting convex edge or an annular limiting groove.

[0064] Specific, combined Figure 6 To further explain in detail, at this time, a limiting portion 211 is respectively set in the annular cylinder wall and the annular surface wall of the recessed annular groove 21, so that the two limiting portions 211 can simultaneously limit and fix the outer convex column segment 11, thereby fully improving the limiting effect of the limiting portion 211.

[0065] In one possible implementation manner, the cross-sectional shape of the annular limiting protrusion is trapezoidal or semicircular.

[0066] Specifically, the annular limiting convex edges in the annular cylinder wall and the annular surface wall of the concave annular groove 21 can be set to be trapezoidal or semicircular, or one of them can be set to be trapezoidal and the other to be semicircular. The trapezoidal or semicircular annular limiting convex edges can both play a beneficial effect of facilitating the deformation of the outer convex column section 11 to avoid the limiting portion 211 when it is riveted.

[0067] In one embodiment, the cross-sectional shape of the annular limiting groove is trapezoidal or semicircular.

[0068] Specifically, the annular limiting grooves in the annular cylinder wall and the annular surface wall of the concave annular groove 21 can be set to be trapezoidal or semicircular, or one of them can be set to be trapezoidal and the other to be semicircular. The trapezoidal or semicircular annular limiting grooves can also play a beneficial effect of facilitating the deformation of the outer convex column section 11 to avoid the limiting portion 211 when it is riveted.

[0069] In one embodiment, the battery cell pole installation assembly also includes a mounting sleeve 3; the inner wall of the mounting sleeve 3 is mounted to abut against the outer convex column section 11, and the outer wall of the mounting sleeve 3 is mounted to abut against the through hole; and the end face of the mounting sleeve 3 facing away from the end cover 5 is connected to the pole sleeve 2.

[0070] Specific, combined Figure 3 In further detail, the inner wall of the mounting sleeve 3 is fitted against the outer boss section 11, and the outer wall of the mounting sleeve 3 is fitted against the through hole, so that the outer boss section 11 in the pole 1 can be stably mounted in the through hole in the end cover 5 through the mounting sleeve 3. In addition, the end surface of the mounting sleeve 3 facing away from the end cover 5 can also be butted against the pole sleeve 2, and the mounting stability of the pole sleeve 2 can also be further improved through the mounting sleeve 3.

[0071] In one embodiment, the battery cell pole installation assembly also includes a sealing gasket 4; the inner wall of the sealing gasket 4 is sleeved and abutted against the outer convex column section 11, and is completely located on the lower side of the through hole; the lower end face of the sealing gasket 4 is squeezed and abutted by the pole 1, and the upper end face is squeezed and abutted by the end cover 5 and the installation sleeve 3.

[0072] Specific, combined Figure 3 To further explain in detail, the inner wall of the sealing gasket 4 is sleeved and abutted against the outer convex column section 11, and is completely located on the lower side of the through hole, and the lower end face of the sealing gasket 4 is squeezed and abutted by the pole 1, and the upper end face is squeezed and abutted by the end cover 5 and the mounting sleeve 3. In this way, the sealing gasket 4 will not be located in the through hole in the end cover 5, avoiding the sealing gasket 4 from being affected by heat during welding, thereby having the beneficial effect of increasing the service life of the sealing gasket 4.

[0073] In addition, the embodiment of the present disclosure further provides a battery cell, which includes a battery cell body and the above-mentioned battery cell pole installation assembly; the pole 1 is arranged inside the battery cell body, and the outer convex column section 11 is at least partially located outside the battery cell body.

[0074] The battery cell includes the above-mentioned battery cell pole installation assembly, which can achieve all its beneficial effects and will not be described in detail here.

[0075] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present disclosure, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0076] The above is only a specific embodiment of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any person skilled in the art who is familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present disclosure, which should be included in the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be based on the protection scope of the claims.

Claims

1. A battery cell pole installation assembly, characterized in that: include: An end cover (5) is arranged to cover one end of the battery core and is provided with a through hole; A pole (1), one end of which is formed with an outer convex column section (11) having a diameter smaller than that of the pole (1), and the outer convex column section (11) is at least partially inserted into the through hole; A pole sleeve (2) sleeved on the outer periphery of the outer convex column section (11); Wherein, a concave annular groove (21) is formed at one end of the pole sleeve (2) facing away from the end cover (5); One end of the outer convex column section (11) facing away from the end cover (5) is riveted to form an electrical connection portion (111) that is filled in the recessed annular groove (21).

2. The battery cell pole installation assembly according to claim 1, characterized in that: A limiting portion (211) is also provided in the recessed annular groove (21); The limiting portion (211) can be fixedly limited with the outer boss segment (11) in the axial direction and radial direction of the outer boss segment (11).

3. The battery cell pole installation assembly according to claim 2, characterized in that: The recessed annular groove (21) comprises an annular cylindrical wall parallel to the outer convex column section (11), and an annular surface wall parallel to the outer convex column section (11); The limiting portion (211) comprises an annular limiting convex edge protruding from the annular cylinder wall or the annular surface wall; The power connection portion (111) is provided with an annular matching groove adapted to the annular limiting convex edge.

4. The battery cell pole installation assembly according to claim 2, characterized in that: The recessed annular groove (21) comprises an annular cylindrical wall parallel to the outer convex column section (11), and an annular surface wall parallel to the outer convex column section (11); The limiting portion (211) comprises an annular limiting groove recessed in the annular cylinder wall or the annular surface wall; The power connection portion (111) is provided with an annular matching edge corresponding to the annular limiting groove.

5. The battery cell pole installation assembly according to claim 2, characterized in that: The recessed annular groove (21) comprises an annular cylindrical wall parallel to the outer convex column section (11), and an annular surface wall parallel to the outer convex column section (11); At least one of the limiting portions (211) is provided in the annular cylinder wall and the annular surface wall, respectively, and the limiting portion (211) comprises an annular limiting convex edge or an annular limiting groove.

6. The battery cell pole installation assembly according to claim 3, characterized in that: The cross-sectional shape of the annular limiting protrusion is trapezoidal or semicircular.

7. The battery cell pole installation assembly according to claim 5, characterized in that: The cross-sectional shape of the annular limiting groove is trapezoidal or semicircular.

8. The battery cell pole installation assembly according to claim 1, characterized in that: The battery cell pole installation assembly also includes an installation sleeve (3); The inner wall of the installation sleeve (3) is sleeved and abutted against the outer convex column section (11), and the outer wall of the installation sleeve (3) is plugged and abutted against the through hole; Furthermore, an end surface of the installation sleeve (3) facing away from the end cover (5) is butted against the pole sleeve (2).

9. The battery cell pole installation assembly according to claim 8, characterized in that: The battery cell pole mounting assembly also includes a sealing gasket (4); The inner wall of the sealing gasket (4) is sleeved and abuts against the outer boss section (11) and is completely located at the lower side of the through hole; The lower end surface of the sealing gasket (4) is pressed and abutted by the pole (1), and the upper end surface is pressed and abutted by the end cover (5) and the mounting sleeve (3).

10. A battery cell, characterized in that: It comprises a battery cell body and a battery cell pole installation assembly as described in any one of claims 1 to 9; The pole (1) is arranged inside the battery cell body, and the outer convex column segment (11) is at least partially located outside the battery cell body.

Images