Square battery cell pole structure

Abstract

The utility model provides a square battery cell pole structure which comprises a cover plate, a pressing block, a pole, a sealing piece and a clamping ring, a lug boss is arranged on one side of the cover plate, and a through hole penetrating through the cover plate is formed in the lug boss; the pressing blocks abut against the interiors of the protruding parts, and installation holes corresponding to the through holes in position are formed in the pressing blocks. One end of the pole abuts against the surface of the cover plate, and the other end of the pole penetrates through the through hole, extends into the mounting hole and is spaced from the inner wall of the mounting hole; the sealing element is sleeved outside the pole and is abutted between the pole and the cover plate as well as between the pole and the pressing block; the clamping ring is embedded in the gap between the pressing block and the pole and is used for relatively fixing the sealing element, the pressing block and the pole, and the clamping ring is embedded in the gap between the pressing block and the pole, so that the top surface of the clamping ring is flush with the top surface of the pole, the pressing block and the pole are relatively fixed, and the fixing capability of the battery cell pole structure is enhanced; the risk of failure of the battery cell top cover is reduced, and the overall safety of the battery cell is improved.

Description

Technical Field

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

[0002] The existing square battery cell pole structures are generally divided into several categories such as injection molding, riveting, and screw riveting. Battery manufacturers generally entrust structural parts suppliers to carry out processing, that is, top cover integration. The top cover received by the battery manufacturer is a whole and has been processed by the supplier; however, with the emergence of various new structures and new battery cell manufacturing processes, due to the particularity of the battery cell's own structure and battery cell assembly process, the top cover can only be processed independently by the battery manufacturer, which makes it impossible to form an effective riveting between the pole and the pressure block outside the battery cell, and can only be fixed by laser welding.

[0003] A pole structure with announcement number CN215816070U includes a top cover plate, an insulating pad is connected to the lower surface of the top cover plate, a plastic groove is provided on the upper surface of the top cover plate, an upper plastic is provided in the plastic groove, the upper plastic is embedded in the plastic groove, the structural shape of the upper plastic is a frame with an open upper end, a pressure plate is provided in the upper plastic, the pressure plate is embedded in the upper plastic, a limit block is provided in the upper plastic, one side of the limit block is fixedly connected to the inner wall of the side of the upper plastic, and the other side of the limit block is in contact with the side of the pressure plate, and a fixing structure is provided on the upper plastic.

[0004] Currently, the compression of the sealing ring and the overall fixation of the top cover are purely fixed by welding marks. There is a risk of weld aging causing the pole airtightness to fail, reducing the overall safety of the battery cell. Utility Model Content

[0005] In view of this, the utility model proposes a square battery cell pole structure, which can enhance the fixing ability of the pole structure, reduce the risk of failure of the battery cell top cover, and improve the overall safety of the battery cell.

[0006] The technical solution of the utility model is implemented as follows: The utility model provides a square battery cell pole structure, including:

[0007] The cover plate has a raised portion on one side, and a through hole penetrating the cover plate is formed in the raised portion;

[0008] A pressing block is abutted against the raised portion and is provided with a mounting hole corresponding to the position of the through hole;

[0009] The pole has one end abutting against the surface of the cover plate, and the other end passes through the through hole and extends into the mounting hole, and a gap is set with the inner wall of the mounting hole;

[0010] A sealing member is sleeved outside the pole, and the sealing member abuts between the pole, the cover plate and the pressing block;

[0011] The clamping ring is embedded in the gap between the pressing block and the pole, and is used to relatively fix the sealing member, the pressing block and the pole.

[0012] On the basis of the above technical solution, preferably, the outer contour shape of the clamping ring matches the inner contour shape of the gap between the pressing block and the pole.

[0013] On the basis of the above technical solution, preferably, the shape of the clamping ring is one of circular, square or oval.

[0014] On the basis of the above technical solution, preferably, the clamping ring is flush with an end surface of one side of the pole close to the raised portion.

[0015] On the basis of the above technical solution, preferably, the pole comprises a connecting piece and a column, wherein:

[0016] A positioning piece is arranged on one side of the cover plate away from the raised portion, and the through hole is located at the center of the positioning piece;

[0017] The connecting piece is abutted in the positioning piece, and a side close to the raised portion is abutted against the surface of the cover plate;

[0018] The column is arranged on one side of the connecting piece close to the raised portion, and one end of the column away from the connecting piece passes through the through hole and extends into the mounting hole.

[0019] On the basis of the above technical solution, preferably, the column includes a lower end, a waist-shaped portion, an outwardly inclined portion and an upper end, wherein:

[0020] The lower end is fixed to the side of the connecting piece close to the cover plate; the waist-shaped portion is fixed to the side of the lower end away from the connecting piece; the outward-inclined portion is fixed to the side of the waist-shaped portion away from the lower end; and the upper end is fixed to the side of the outward-inclined portion away from the waist-shaped portion.

[0021] The lower end, the waist-shaped portion, the outwardly inclined portion and the upper end are all cylindrical, and the diameter of the lower end is larger than the diameter of the upper end, and the diameter of the upper end is larger than the diameter of the waist-shaped portion;

[0022] The outwardly inclined portion, the waist-shaped portion and the upper end portion are all arranged in an inclined manner.

[0023] On the basis of the above technical solution, preferably, the mounting hole includes a vertical section and an inclined section, wherein:

[0024] The vertical section is connected to the inclined section, and the vertical section is located on a side of the inclined section away from the raised portion; the lower end portion abuts against the inside of the vertical section;

[0025] The inclined section and the vertical section are arranged obliquely, and the waist-shaped portion, the outwardly inclined portion and the upper end portion are all located in the inclined section, and are arranged with a gap between them and the inner wall of the inclined section;

[0026] The outer side wall of the clamping ring is respectively in contact with the inclined section, the lower end, the waist-shaped portion, the outwardly inclined portion and the upper end.

[0027] On the basis of the above technical solution, preferably, the angle between the waist-shaped portion and the outwardly inclined portion is greater than or equal to the angle between the inclined section and the vertical section.

[0028] On the basis of the above technical solution, preferably, the difference between the diameter of the upper end portion and the diameter of the waist-shaped portion is greater than 0.8 mm, and the diameter of the lower end portion is greater than or equal to the diameter of the waist-shaped portion.

[0029] On the basis of the above technical solution, preferably, the clamping ring includes a plurality of pairs of arc-shaped members, wherein the plurality of pairs of arc-shaped members are embedded in the gap between the pressure block and the pole, and the adjacent sides of two adjacent arc-shaped members are in contact with each other.

[0030] The square battery cell pole structure of the utility model has the following beneficial effects compared with the prior art:

[0031] (1) By putting a sealing member on the outside of the pole, then placing the pressing block in the protruding portion, and passing the pole through the through hole of the cover plate, and finally embedding the clamping ring in the gap between the pressing block and the pole, so that the top surface of the clamping ring is flush with the top surface of the pole, the pressing block and the pole are relatively fixed, the fixing ability of the battery cell pole structure is strengthened, the risk of failure of the battery cell top cover is reduced, and the overall safety of the battery cell is improved;

[0032] (2) The clamping ring is embedded in the gap between the pressure block and the pole, so that it can be tightly abutted between the pole, the cover plate and the pressure block, thereby indirectly fixing the pole and ensuring the compression amount of the seal, meeting the airtightness requirements of the cover plate. Since the seal has sealed the cover plate, the gap between the pole, the clamping ring and the pressure block does not require very high strength during laser welding, and thus there is no situation where the pressure block falls off due to poor weld strength, thereby improving the stability of the battery cell pole structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0034] Figure 1 It is a three-dimensional diagram of the square battery pole structure of the utility model;

[0035] Figure 2 It is a front view of the square battery pole structure of the utility model;

[0036] Figure 3 The utility model is a square battery pole structure Figure 2 Sectional view at AA;

[0037] Figure 4 The utility model is a square battery pole structure Figure 3 A partial enlarged schematic diagram of point B in the middle;

[0038] Figure 5 A three-dimensional diagram of the square battery cell pole structure of the utility model from another perspective;

[0039] Figure 6 It is a three-dimensional diagram of a first embodiment of a clamping ring of a square battery pole structure of the utility model;

[0040] Figure 7 It is a three-dimensional diagram of a second embodiment of the clamping ring of the square battery pole structure of the utility model;

[0041] Figure 8 It is a side view of the pole of the square battery pole structure of the utility model;

[0042] Fig. 9 It is a three-dimensional diagram of the pressing block of the square battery cell pole structure of the present invention. DETAILED DESCRIPTION

[0043] The following will be combined with the implementation of the utility model to clearly and completely describe the technical solutions in the implementation of the utility model. Obviously, the described implementation is only a part of the implementation of the utility model, not all of the implementations. Based on the implementation of the utility model, all other implementations obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0044] like Figure 1-9 As shown, a square battery cell pole structure of the utility model includes a cover plate 1, a pressing block 2, a pole 3, a sealing member 4 and a clamping ring 5.

[0045] Among them, a protrusion 11 is provided on one side of the cover plate 1, and a through hole 100 penetrating the cover plate 1 is provided in the protrusion 11; the pressure block 2 abuts against the protrusion 11, and a mounting hole 200 corresponding to the position of the through hole 100 is provided on the pressure block 2; one end of the pole 3 abuts against the surface of the cover plate 1, and the other end penetrates through the through hole 100 and extends into the mounting hole 200, and a gap is set with the inner wall of the mounting hole 200; the sealing member 4 is sleeved on the outside of the pole 3, and the sealing member 4 abuts between the pole 3 and the cover plate 1 and the pressure block 2; the clamping ring 5 is embedded in the gap between the pressure block 2 and the pole 3, and is used to relatively fix the sealing member 4, the pressure block 2 and the pole 3.

[0046] It should be noted that the square battery cell pole structure is only applicable to the situation where the top cover cannot be entrusted to the supplier for integration due to the battery cell's own structure and assembly process, and can only be assembled and processed by itself. The clamping ring 5 is embedded in the gap between the pressure block 2 and the pole 3, which strengthens the fixing ability of the structure, reduces the risk of failure of the battery cell top cover, and improves the overall safety of the battery cell.

[0047] Among them, when the battery cell top cover is assembled, the seal 4 is first sleeved on the outside of the pole 3, and then the pole 3 is passed through the through hole 100 of the cover plate 1, and the seal 4 is tightly abutted between the pole 3 and the cover plate 1 and the pressure block 3, then the pressure block 2 is placed in the protrusion 11, and finally the clamping ring 5 is embedded in the gap between the pressure block 2 and the pole 3, and a small force is applied to make the top surface of the clamping ring 5 flush with the top surface of the pole 3, so that the seal 4 is relatively fixed to the pressure block 2 and the pole 3, and cannot move in the height direction of the cover body 1, thereby indirectly achieving the effect of fixing the pole 3 and ensuring the compression amount of the seal 4, meeting the airtightness requirement of the cover plate 1, and because the seal 4 has sealed the cover plate 1, the gap between the pole 3, the clamping ring 5, and the pressure block 3 does not require very high strength during laser welding, and thus there is no situation where the pressure block falls off due to poor weld strength.

[0048] The outer contour shape of the clamping ring 5 in this embodiment matches the inner contour shape of the gap between the pressing block 2 and the pole 3 .

[0049] It should be noted that the stability and safety of the square battery cell pole structure can be further enhanced. The outer contour of the clamp 5 matches the inner contour of the gap, so that the clamp 5 can be accurately embedded in the gap without excessive shaking or displacement. This tight fit not only ensures that the clamp 5 can firmly fix the seal 4 to prevent it from moving during operation.

[0050] The shape of the clamping ring 5 in this embodiment is one of round, square or oval.

[0051] Specifically, in this embodiment, the preferred shape of the snap ring 5 is circular.

[0052] In this embodiment, the clamping ring 5 is flush with the end surface of the pole 3 on one side close to the protrusion 11 .

[0053] It should be noted that in the present embodiment, the clamping ring 5 is flush with the end face of the pole 3, which can ensure the flatness and consistency of the appearance of the entire pole structure after assembly. Such a design helps to reduce appearance defects caused by assembly errors or uneven parts, and improves the overall aesthetics of the battery cell. The design of flush end faces can also help to improve the air tightness and sealing effect of the battery cell top cover. Since the clamping ring 5 fits tightly with the end face of the pole 3, the risk of air leakage caused by gaps or unevenness can be reduced, which is crucial to the performance and safety of the battery cell and helps to ensure the stability and reliability of the battery cell during long-term use. The design can also help to simplify the assembly process. Since the clamping ring 5 is flush with the end face of the pole 3, the operator can more easily determine whether the clamping ring has been correctly embedded in the gap during assembly, thereby improving the accuracy and efficiency of assembly.

[0054] The pole 3 in this embodiment includes a connecting piece 31 and a column 32, wherein a positioning piece 12 is provided on the side of the cover plate 1 away from the protrusion 11, and the through hole 100 is located at the center of the positioning piece 12; the connecting piece 31 abuts against the positioning piece 12, and the side close to the protrusion 11 abuts against the surface of the cover plate 1; the column 32 is provided on the side of the connecting piece 31 close to the protrusion 11, and the end of the column 32 away from the connecting piece 31 passes through the through hole 100 and extends into the mounting hole 200.

[0055] It should be noted that the connection piece 31 is insulated from the cover plate 1 , and the connection piece 31 is installed in the positioning member 12 , so that the connection piece 31 can be quickly positioned and conveniently installed and fixed.

[0056] The column 32 in this embodiment includes a lower end 321, a waist-shaped portion 322, an outwardly inclined portion 323 and an upper end 324, wherein the lower end 321 is fixed to the side of the connecting piece 31 close to the cover plate 1; the waist-shaped portion 322 is fixed to the side of the lower end 321 away from the connecting piece 31; the outwardly inclined portion 323 is fixed to the side of the waist-shaped portion 322 away from the lower end 321; the upper end 324 is fixed to the side of the outwardly inclined portion 323 away from the waist-shaped portion 322; the lower end 321, the waist-shaped portion 322, the outwardly inclined portion 323 and the upper end 324 are all cylindrical, and the diameter of the lower end 321 is greater than the diameter of the upper end 324, and the diameter of the upper end 324 is greater than the diameter of the waist-shaped portion 322; the outwardly inclined portion 323 and the waist-shaped portion 322 and the upper end 324 are all inclined.

[0057] The mounting hole 200 in this embodiment includes a vertical section 201 and an inclined section 202, wherein the vertical section 201 is connected to the inclined section 202, and the vertical section 201 is located on the side of the inclined section 202 away from the protrusion 11; the lower end 321 abuts against the vertical section 201; the inclined section 202 is inclined between the vertical section 201, and the waist-shaped portion 322, the outwardly inclined portion 323 and the upper end 324 are all located in the inclined section 202, and are set with a gap between them and the inner wall of the inclined section 202; the outer side wall of the retaining ring 5 abuts against the inclined section 202, the lower end 321, the waist-shaped portion 322, the outwardly inclined portion 323 and the upper end 324 respectively.

[0058] It should be noted that the end surface of the vertical section 201 and the end surface of the lower end portion 321 are at the same height, and the inclined section 202 and the diameter of the vertical section 201 are arranged at an obtuse angle.

[0059] In this embodiment, the inclined section 202 is the limiting part 1 and the outwardly inclined part 323 is the limiting part 2, which embeds the clamping ring 5 into the gap between the pressing block 2 and the pole 3, and makes the top surface of the clamping ring 5 flush with the top surface of the pole 3. The limiting part 2 limits the clamping ring 5 from moving further in the negative direction of the Z axis, and the limiting part 1 limits the pole 3 from moving further in the negative direction of the Z axis.

[0060] The included angle between the waist-shaped portion 322 and the outwardly inclined portion 323 is greater than or equal to the included angle between the inclined section 202 and the vertical section 201 .

[0061] Assuming that the included angle between the waist-shaped portion 322 and the outwardly inclined portion 323 is A°, and the included angle between the inclined section 202 and the vertical section 201 is B°, the present embodiment needs to satisfy: A°≤B°, so as to ensure that the clamping ring 5 can be embedded in the gap between the pressing block 2 and the pole 3 .

[0062] The difference between the diameter of the upper end portion 324 and the diameter of the waist-shaped portion 322 is greater than 0.8 mm, and the diameter of the lower end portion 321 is greater than or equal to the diameter of the waist-shaped portion 322 .

[0063] Assuming that the diameter of the upper end portion 324 is b, the diameter of the waist-shaped portion 322 is a, and the diameter of the lower end portion 321 is c, the present embodiment needs to satisfy: ba≥0.8 mm to ensure the limiting capability of the clamping ring 5; c≥a to ensure that the pole 3 can be assembled normally.

[0064] In this embodiment, the clamping ring 5 includes a plurality of pairs of arc-shaped members 51 , wherein the plurality of pairs of arc-shaped members 51 are embedded in the gap between the pressing block 2 and the pole 3 , and the adjacent sides of two adjacent arc-shaped members 51 are in contact with each other.

[0065] It should be noted that the number of arc-shaped members 51 is 2N, where N≥1. Multiple arc-shaped members 51 can be spliced ​​together to form a structure with the same contour shape as the gap between the pressing block 2 and the pole 3, and then the multiple arc-shaped members 51 are respectively and sequentially embedded in the gap between the pressing block 2 and the pole 3, which can also achieve relative fixation between the pressing block 2 and the pole 3.

[0066] Working principle:

[0067] First, the seal 4 is sleeved on the outside of the pole 3, and then the pressure block 2 is placed in the raised portion 11, and then the pole 3 passes through the through hole 100 of the cover plate 1, and the seal 4 is tightly abutted between the pole 3, the cover plate 1 and the pressure block 3, and finally the clamping ring 5 is embedded in the gap between the pressure block 2 and the pole 3, and the top surface of the clamping ring 5 is flush with the top surface of the pole 3, so that the seal 4, the pressure block 2 and the pole 3 are relatively fixed.

[0068] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A square battery cell pole structure, characterized in that: include: A convex portion (11) is provided on one side of the cover plate (1), and a through hole (100) penetrating the cover plate (1) is provided in the convex portion (11); A pressing block (2) is abutted against the raised portion (11), and a mounting hole (200) corresponding to the position of the through hole (100) is provided on the pressing block (2); A pole (3), one end of which abuts against the surface of the cover plate (1), and the other end of which passes through the through hole (100) and extends into the mounting hole (200), and is provided with a gap with the inner wall of the mounting hole (200); A sealing member (4) is sleeved outside the pole (3), and the sealing member (4) is in contact between the pole (3), the cover plate (1) and the pressing block (2); The clamping ring (5) is embedded in the gap between the pressing block (2) and the pole (3) and is used to relatively fix the sealing member (4), the pressing block (2) and the pole (3).

2. The square battery cell pole structure according to claim 1, characterized in that: The outer contour shape of the clamping ring (5) matches the inner contour shape of the gap between the pressing block (2) and the pole (3).

3. The square battery cell pole structure according to claim 2, characterized in that: The shape of the clamping ring (5) is one of a circle, a square or an ellipse.

4. The square battery cell pole structure according to claim 1, characterized in that: The clamping ring (5) is flush with an end surface of one side of the pole (3) close to the raised portion (11).

5. The square battery cell pole structure according to claim 1, characterized in that: The pole (3) comprises a connecting piece (31) and a column (32), wherein: A positioning piece (12) is provided on one side of the cover plate (1) away from the raised portion (11), and the through hole (100) is located at the center of the positioning piece (12); The connecting piece (31) abuts against the inside of the positioning piece (12), and a side close to the raised portion (11) abuts against the surface of the cover plate (1); The column (32) is arranged on a side of the connecting piece (31) close to the protruding portion (11), and one end of the column (32) away from the connecting piece (31) passes through the through hole (100) and extends into the mounting hole (200).

6. The square battery cell pole structure according to claim 5, characterized in that: The column (32) includes a lower end (321), a waist-shaped portion (322), an outwardly inclined portion (323) and an upper end (324), wherein: The lower end portion (321) is fixed to a side of the connecting piece (31) close to the cover plate (1); the waist-shaped portion (322) is fixed to a side of the lower end portion (321) away from the connecting piece (31); the outward-inclined portion (323) is fixed to a side of the waist-shaped portion (322) away from the lower end portion (321); and the upper end portion (324) is fixed to a side of the outward-inclined portion (323) away from the waist-shaped portion (322); The lower end portion (321), the waist-shaped portion (322), the outwardly inclined portion (323) and the upper end portion (324) are all cylindrical, and the diameter of the lower end portion (321) is greater than the diameter of the upper end portion (324), and the diameter of the upper end portion (324) is greater than the diameter of the waist-shaped portion (322); The outwardly inclined portion (323), the waist-shaped portion (322) and the upper end portion (324) are all arranged in an inclined manner.

7. The square battery cell pole structure according to claim 6, characterized in that: The mounting hole (200) comprises a vertical section (201) and an inclined section (202), wherein: The vertical section (201) is connected to the inclined section (202), and the vertical section (201) is located on a side of the inclined section (202) away from the raised portion (11); the lower end portion (321) abuts against the inside of the vertical section (201); The inclined section (202) and the vertical section (201) are arranged obliquely, and the waist-shaped portion (322), the outwardly inclined portion (323) and the upper end portion (324) are all located in the inclined section (202), and are arranged with a gap between them and the inner wall of the inclined section (202); The outer side wall of the clamping ring (5) is respectively in contact with the inclined section (202), the lower end portion (321), the waist-shaped portion (322), the outwardly inclined portion (323) and the upper end portion (324).

8. The square battery cell pole structure according to claim 7, characterized in that: The included angle between the waist-shaped portion (322) and the outwardly inclined portion (323) is greater than or equal to the included angle between the inclined section (202) and the vertical section (201).

9. The square battery cell pole structure according to claim 7, characterized in that: The difference between the diameter of the upper end portion (324) and the diameter of the waist-shaped portion (322) is greater than 0.8 mm, and the diameter of the lower end portion (321) is greater than or equal to the diameter of the waist-shaped portion (322).

10. The square battery cell pole structure according to claim 1, characterized in that: The clamping ring (5) comprises a plurality of pairs of arc-shaped members (51), wherein the plurality of pairs of arc-shaped members (51) are all embedded in the gap between the pressing block (2) and the pole (3), and the adjacent sides of two adjacent arc-shaped members (51) are in contact with each other.

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