Pole

Abstract

The invention relates to the technical field of battery structures, and discloses a pole which comprises a first sub-pole, a second sub-pole, a third sub-pole and a fourth sub-pole, the connecting part is connected to the first end, in the axial direction, of the column body; the connecting part protrudes relative to the column body in the radial direction, so that a step surface is formed between the connecting part and the column body; the second sub-pole is provided with a first surface, the first surface is sunken to form a mounting groove, so that the second sub-pole surrounds the mounting groove to form a groove inner wall, and the connecting part is inserted into the mounting groove; the third sub-pole column is arranged on the column body in a sleeving manner and abuts against the step surface, and the third sub-pole column and the second sub-pole column are arranged in a welding manner; according to the pole provided by the invention, the connecting part is inserted into the mounting groove, so that the first sub-pole is matched with the second sub-pole, on the basis, the third sub-pole is sleeved on the pole body and is propped against the step surface, the third sub-pole is used for limiting the connecting part, and the third sub-pole is welded and fixed with the inner wall of the groove, so that a stable whole pole is formed.

Description

Technical Field

[0001] The present invention relates to the technical field of battery structures, and in particular to a pole. Background Art

[0002] The electrodes include positive electrodes and negative electrodes. The negative electrode refers to the component in the battery used to connect the negative electrode to the external circuit. Its structural design must ensure good conductivity and mechanical strength.

[0003] In the related art, when processing and producing poles, friction welding or composite plate pressing is often used. However, both methods have the defects of complex processing and great difficulty in production. Specifically, the friction welding process requires the workpiece, such as an aluminum rod and a base plate, to rotate at a relatively high speed to generate heat, thereby fusing the aluminum rod and the base plate, and then processing to obtain the product. The welding process is very complicated and difficult to produce; the composite plate process requires pressing multiple layers of materials, and then processing to obtain the product. The pressing process is very complicated and difficult to produce. Summary of the Invention

[0004] In view of this, the present invention provides a pole to solve the problem of complex pole processing methods and high production difficulty.

[0005] The present invention provides a pole, comprising: a first sub-pole, comprising a column and a connecting portion; the connecting portion is connected to a first end of the column along the axial direction; the connecting portion is protruded relative to the column in the radial direction to form a step surface between the connecting portion and the column; a second sub-pole, having a first surface, and a mounting groove is formed in a recessed manner in the first surface, so that the second sub-pole surrounds the mounting groove to form a groove inner wall, and the connecting portion is inserted into the mounting groove; a third sub-pole, sleeved on the column and abutted against the step surface, and the third sub-pole is welded to the second sub-pole.

[0006] Beneficial effect: By setting the three matching structural features of the mounting groove, the step surface and the third sub-pole, the connecting portion is inserted into the mounting groove, so that the first sub-pole and the second sub-pole are matched. On this basis, the second sub-pole is provided with a step surface, which is located in the mounting groove. The third sub-pole is sleeved on the column and abuts against the step surface, so that the third sub-pole can limit the connecting portion in the axial direction. Then, the third sub-pole is welded and fixed to the inner wall of the groove, thereby forming a stable pole as a whole. Compared with the friction welding or composite plate process in the related art, no complicated welding or pressing work is required. By means of the coordination between the mounting groove, the step surface, the third sub-pole and other structural features, the first sub-pole, the second sub-pole and the third sub-pole can be coordinated together to obtain an overall pole structure. The overall installation process is simple and reliable, effectively reducing the production cost and process difficulty. Moreover, the first sub-pole, the second sub-pole and the third sub-pole can be directly obtained by a simple forming process such as stamping, without the need for additional processing. The overall production process is simple and the processing difficulty is low. In addition, the first sub-pole, the second sub-pole and the third sub-pole can all be mass-produced separately, reducing the unit cost and improving production efficiency.

[0007] In an optional embodiment, the third sub-pole is located in the mounting groove, and the outer peripheral side of the third sub-pole is arranged in contact with the inner wall of the groove; the third sub-pole has a first side surface and a second side surface arranged opposite to each other in the axial direction, the first side surface abuts the step surface, and the second side surface is arranged flush with the first surface.

[0008] Beneficial effects: the step surface is in the mounting groove, and the first side surface of the third sub-pole is arranged in contact with the step surface, thereby ensuring the axial stability of the first sub-pole; the outer peripheral side of the third sub-pole is arranged in contact with the inner wall of the groove of the second sub-pole, thereby ensuring the radial stability of the third sub-pole; wherein, the first sub-pole is inserted into the mounting groove, and the outer peripheral side of the connecting portion is also arranged in contact with the inner wall of the groove, while the inner wall of the through hole of the third sub-pole is arranged in contact with the outer peripheral side of the column, thereby ensuring the radial stability of the first sub-pole; the first sub-pole, the second sub-pole, and the third sub-pole are fitted together at the connection position, thereby effectively ensuring the stability of the entire pole, avoiding loosening of the pole structure, and improving the reliability of the overall structure.

[0009] Beneficial effect: The first surface is a plane in which the second sub-pole is recessed and provided with a mounting groove, and the second side surface of the third sub-pole is flush with the first surface of the second sub-pole, thereby avoiding the third sub-pole being convex or concave equivalent to the first surface, so that the second side surface and the first surface are smoothly transitioned in the radial direction, thereby avoiding the uneven structure of the pole at the matching position between the second sub-pole and the third sub-pole, which affects the use of the pole.

[0010] In an optional embodiment, the outer peripheral side of the third sub-pole is welded to the fitting position of the inner wall of the groove to form a weld; the first surface is recessed with a first accommodating groove at a position close to the weld; the second side surface is recessed with a second accommodating groove at a position close to the weld, and the second accommodating groove corresponds to and communicates with the first accommodating groove.

[0011] Beneficial effect: By respectively arranging the first accommodating groove and the second accommodating groove at positions close to the weld on the first surface and the second side surface, the first accommodating groove corresponds to and communicates with the second accommodating groove, forming a space for accommodating the weld mark. The weld mark formed during welding can be correspondingly located in the above-mentioned space, effectively avoiding the weld mark from protruding relative to the first surface and the second side surface, avoiding the weld mark from affecting the pole structure, and further avoiding the weld mark from interfering with the subsequent assembly of the pole and other components.

[0012] In an optional embodiment, the width of the first accommodating groove in the radial direction is L1, wherein the value range of L1 is 0.5mm≤L1≤1mm.

[0013] Beneficial effect: The width L1 of the first accommodating groove in the radial direction has a value range of 0.5mm≤L1≤1mm. Such a setting can ensure that the weld mark can be accommodated without excessively weakening the strength of the pole, thereby ensuring the stability of the overall structure; if the width L1 of the first accommodating groove is too small, such as the width L1 of the first accommodating groove is less than 0.5mm, the size of the first accommodating groove is too small, making it difficult to accommodate the weld mark, so that the weld mark is exposed, affecting the subsequent assembly of the pole with other components; if the width L1 of the first accommodating groove is too large, such as when the width L1 of the first accommodating groove exceeds 1mm, the structural strength of the pole will be excessively weakened, reducing the stability of the overall structure. The excessive width L1 of the first accommodating groove will also cause the space in the groove to be too large. On the premise of fully accommodating the weld mark, there is still a lot of surplus, resulting in a waste of space size.

[0014] In an optional embodiment, the depth of the first accommodating groove in the axial direction is Y1, wherein the value range of Y1 is 0.2mm≤Y1≤0.5mm.

[0015] Beneficial effect: The depth Y1 of the first receiving groove in the axial direction has a value range of 0.2mm≤Y1≤0.5mm. This setting can ensure that the weld mark is fully accommodated without excessively weakening the strength of the pole, thereby ensuring the stability of the overall structure. If the depth Y1 of the first receiving groove is too small, such as the depth Y1 of the first receiving groove is less than 0.2mm, it is difficult to fully accommodate the weld mark, and the height of the weld mark in the radial direction is likely to exceed the depth Y1 of the first receiving groove, resulting in partial exposure of the weld mark, affecting the subsequent assembly of the pole with other parts. If the depth Y1 of the first receiving groove is too large, such as the depth Y1 of the first receiving groove exceeds 0.5mm, the structural strength of the pole will be excessively weakened, reducing the stability of the overall structure. The excessive depth Y1 of the first receiving groove will also result in an excessively large space in the groove. Under the premise of fully accommodating the weld mark, there is still a lot of surplus, resulting in a waste of space size.

[0016] In an optional embodiment, the second receiving groove has a radial width L2, wherein the value range of L2 is 0.5mm≤L2≤1mm; and / or the second receiving groove has an axial depth Y2, wherein the value range of Y2 is 0.2mm≤Y2≤0.5mm.

[0017] In an optional implementation, the thickness of the third sub-pole in the axial direction is H1, wherein the value range of H1 is 0.5 mm ≤ H1 ≤ 2 mm.

[0018] Beneficial effect: The value range of the thickness H1 of the third sub-pole in the axial direction is 0.5mm≤H1≤2mm. Such a setting can not only ensure sufficient connection strength between the first sub-pole and the second sub-pole and the third sub-pole, but also avoid occupying too much space in the installation slot and affecting the stability of the overall structure; if the thickness H1 of the third sub-pole is too small, such as the thickness H1 of the third sub-pole is less than 0.5mm, the fixing strength of the third sub-pole is insufficient, and it is difficult to effectively and stably limit the first sub-pole to be connected between the second sub-pole and the third sub-pole. In addition, it will also affect the stability of the welding fixation of the third sub-pole and the second sub-pole; if the thickness H1 of the third sub-pole is too large, such as the thickness H1 of the third sub-pole exceeds 2mm, it will cause the third sub-pole to occupy too much space in the installation slot, which on the one hand increases the cost, and on the other hand affects the thickness of the connection part when the depth of the installation slot remains unchanged, thereby affecting the structural strength of the connection part.

[0019] In an optional embodiment, in the axial direction, the penetration depth H3 of the weld exceeds the thickness H1 of the third sub-pole by a distance of Δ H, satisfies 0.3mm≤ΔH≤1mm.

[0020] Beneficial effect: The weld penetration H3 is greater than the thickness H1 of the third sub-pole. This arrangement ensures that the weld completely penetrates the third sub-pole, thereby forming a full penetration weld, ensuring sufficient connection strength between the second sub-pole and the third sub-pole; further, the weld penetration H3 exceeds the thickness H1 of the third sub-pole by a distance Δ The value range of H is 0.3mm≤ΔH≤1mm. This setting can ensure sufficient connection strength while avoiding material waste and structural deformation due to excessive melting. If the weld penetration H3 exceeds the thickness H1 of the third sub-pole, Δ The value of H is too small, such as Δ If H is less than 0.3mm, the penetration of the weld relative to the third sub-pole is small, making it difficult to form a stable weld at the third sub-pole, affecting the connection strength; if the weld penetration H3 exceeds the thickness H1 of the third sub-pole, Δ The value of H is too large, such as Δ If H exceeds 1 mm, the weld penetration is too deep, which may easily lead to excessive melting of the third sub-pole material, resulting in material waste and structural deformation at the weld, affecting the welding quality.

[0021] In an optional embodiment, along the radial direction, the diameter of the cylinder is D1, wherein the value range of D1 is 3mm≤D1≤15mm.

[0022] In an optional embodiment, the diameter of the connecting portion is D2, wherein the value range of (D2-D1) is 1.5mm≤(D2-D1)≤3mm.

[0023] In an optional embodiment, along the axial direction, the thickness of the connecting portion is H2, wherein the value range of H2 is 0.5 mm ≤ H2 ≤ 1.5 mm. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0025] Figure 1 is a schematic cross-sectional view of a pole according to the present invention;

[0026] Figure 2 For the present invention Figure 1 A magnified schematic diagram of point A in the middle;

[0027] Figure 3 Schematic diagram of the coordination between the first sub-pole and the second sub-pole of the present invention;

[0028] Figure 4 Schematic diagram of the explosion of the pole of the present invention;

[0029] Figure 5 Schematic diagram of the pole of the present invention.

[0030] Description of reference numerals:

[0031] 1. First sub-pole; 11. Column; 12. Connecting portion; 13. Step surface; 2. Second sub-pole; 21. Mounting groove; 22. First surface; 23. Inner wall of groove; 3. Third sub-pole; 31. First side surface; 32. Second side surface; 33. Through hole; 4. First accommodating groove; 5. Second accommodating groove; 6. Weld. DETAILED DESCRIPTION

[0032] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative efforts shall fall within the scope of protection of the present invention.

[0033] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0034] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0035] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0036] The following combination Figures 1 to 5 , describing embodiments of the present invention.

[0037] According to an embodiment of the present invention, a pole is provided, comprising: a first sub-pole 1, comprising a column 11 and a connecting portion 12; the connecting portion 12 is connected to a first end of the column 11 in the axial direction; the connecting portion 12 is radially protruding relative to the column 11 to form a step surface 13 between the connecting portion 12 and the column 11; a second sub-pole 2, having a first surface 22, and a mounting groove 21 is formed in a recessed manner on the first surface 22, so that the second sub-pole 2 surrounds the mounting groove 21 to form a groove inner wall 23, and the connecting portion 12 is inserted into the mounting groove 21; a third sub-pole 3, sleeved on the column 11 and abutting the step surface 13, and the third sub-pole 3 is welded to the second sub-pole 2.

[0038] It should be noted that the electrode can be but is not limited to a negative electrode.

[0039] The pole provided in this embodiment has three matching structural features, namely, the mounting groove 21, the step surface 13 and the third sub-pole 3. The connecting portion 12 is inserted into the mounting groove 21, so that the first sub-pole 1 is matched with the second sub-pole 2. On this basis, the second sub-pole 2 is provided with a step surface 13, which is in the mounting groove 21. The third sub-pole 3 is sleeved on the column 11 and abuts against the step surface 13, so that the third sub-pole 3 can limit the connecting portion 12 in the axial direction. Then, the third sub-pole 3 is welded and fixed to the inner wall 23 of the groove to form a stable pole as a whole. Compared with the friction welding or composite plate process in the related art, there is no need for complicated The first sub-pole 1, the second sub-pole 2, and the third sub-pole 3 can be matched together by means of the cooperation between the mounting groove 21, the step surface 13, the third sub-pole 3 and other structural features to obtain an overall pole structure. The overall installation process is simple and reliable, which effectively reduces the production cost and process difficulty. The first sub-pole 1, the second sub-pole 2 and the third sub-pole 3 can be directly obtained by a simple forming process such as stamping, without the need for additional processing. The overall production process is simple and the processing difficulty is low. In addition, the first sub-pole 1, the second sub-pole 2 and the third sub-pole 3 can all be mass-produced separately, which reduces the unit cost and improves production efficiency.

[0040] It should be noted that the material of the first sub-pole 1 can be metal aluminum, and the material of the second sub-pole 2 and the third sub-pole 3 can both be metal copper. The second sub-pole 2 and the third sub-pole 3 are made of the same material, and the weld 6 formed during welding is of higher quality, avoiding welding defects due to material differences, improving the overall strength of the pole, and extending the service life of the pole.

[0041] It is understandable that a through hole 33 is provided through the third sub-pole 3 so that the third sub-pole 3 is sleeved on the column 11 , and the inner wall of the through hole 33 is in contact with the outer circumference of the column 11 .

[0042] In some embodiments, combined Figure 1 As shown, the third sub-pole 3 is located in the mounting groove 21, and the outer peripheral side of the third sub-pole 3 is arranged in contact with the inner wall 23 of the groove; the third sub-pole 3 has a first side surface 31 and a second side surface 32 arranged opposite to each other in the axial direction, the first side surface 31 abuts the step surface 13, and the second side surface 32 is arranged flush with the first surface 22.

[0043] Specifically, the step surface 13 is in the mounting groove 21, and the first side surface 31 of the third sub-pole 3 is arranged in contact with the step surface 13 to ensure the axial stability of the first sub-pole 1; the outer peripheral side of the third sub-pole 3 is fitted with the inner wall 23 of the groove of the second sub-pole 2 to ensure the radial stability of the third sub-pole 3; wherein, the first sub-pole 1 is inserted into the mounting groove 21, and the outer peripheral side of the connecting portion 12 is also fitted with the inner wall 23 of the groove. At the same time, the inner wall of the through hole 33 of the third sub-pole 3 is fitted with the outer peripheral side of the column 11 to ensure the radial stability of the first sub-pole 1; the first sub-pole 1, the second sub-pole 2, and the third sub-pole 3 are fitted with each other at the connection position, effectively ensuring the stability of the entire pole, avoiding loosening of the pole structure, and improving the reliability of the overall structure.

[0044] Specifically, the first surface 22 is a plane in which the second sub-pole 2 is recessed and provided with a mounting groove 21, and the second side surface 32 of the third sub-pole 3 is flush with the first surface 22 of the second sub-pole 2, so as to avoid the third sub-pole 3 being equivalent to the first surface 22 being protruded or recessed, so that the second side surface 32 and the first surface 22 are smoothly transitioned in the radial direction, thereby avoiding the uneven structure of the pole at the matching position of the second sub-pole 2 and the third sub-pole 3, which affects the use of the pole.

[0045] In some embodiments, combined Figure 1 As shown, welding is provided at the fitting position between the outer peripheral side of the third sub-pole 3 and the inner wall 23 of the groove to form a weld 6; the first surface 22 is recessed with a first accommodating groove 4 at a position close to the weld 6; the second side surface 32 is recessed with a second accommodating groove 5 at a position close to the weld 6, and the second accommodating groove 5 corresponds to and communicates with the first accommodating groove 4.

[0046] Specifically, the purpose of setting the first accommodating groove 4 and the second accommodating groove 5 is to accommodate weld marks. Weld marks refer to excess deposits formed at the welding interface after the solder solidifies during welding. By respectively setting the first accommodating groove 4 and the second accommodating groove 5 at positions close to the weld 6 on the first surface 22 and the second side surface 32, the first accommodating groove 4 and the second accommodating groove 5 correspond to and communicate with each other, forming a space for accommodating weld marks. The weld marks formed during welding can be correspondingly located in the above-mentioned space, effectively avoiding the weld marks from protruding relative to the first surface 22 and the second side surface 32, avoiding the weld marks from affecting the pole structure, and further avoiding the weld marks from interfering with the subsequent assembly of the pole and other components.

[0047] In some embodiments, combined Figure 2 As shown, the width of the first accommodating groove 4 in the radial direction is L1, wherein the value range of L1 is 0.5mm≤L1≤1mm.

[0048] In this embodiment, the width L1 of the first accommodating groove 4 in the radial direction is in the range of 0.5 mm ≤ L1 ≤ 1 mm. This configuration can ensure that the weld mark can be accommodated without excessively weakening the strength of the pole, thereby ensuring the stability of the overall structure.

[0049] Specifically, if the width L1 of the first accommodating groove 4 is too small, such as the width L1 of the first accommodating groove 4 is less than 0.5 mm, the size of the first accommodating groove 4 is too small, making it difficult to accommodate the weld mark, so that the weld mark is exposed, affecting the subsequent assembly of the pole with other components; if the width L1 of the first accommodating groove 4 is too large, such as the width L1 of the first accommodating groove 4 exceeds 1 mm, it will excessively weaken the structural strength of the pole and reduce the overall structural stability. The excessive width L1 of the first accommodating groove 4 will also cause the space in the groove to be too large. On the premise of fully accommodating the weld mark, there is still a lot of surplus, resulting in waste of space size.

[0050] Optionally, the value of the width L1 can be any value among 0.5 mm, 0.51 mm, 0.63 mm, 0.84 mm, 1 mm, etc., or a value between any two values.

[0051] In some embodiments, combined Figure 2 As shown, the depth of the first receiving groove 4 in the axial direction is Y1, wherein the value range of Y1 is 0.2mm≤Y1≤0.5mm.

[0052] In this embodiment, the depth Y1 of the first accommodating groove 4 in the axial direction is in the range of 0.2mm≤Y1≤0.5mm. This setting can ensure that the weld mark is fully accommodated without excessively weakening the strength of the pole, thereby ensuring the stability of the overall structure.

[0053] Specifically, if the depth Y1 of the first receiving groove 4 is too small, such as if the depth Y1 of the first receiving groove 4 is less than 0.2 mm, it will be difficult to fully accommodate the weld mark. The radial height of the weld mark will easily exceed the depth Y1 of the first receiving groove 4, resulting in the weld mark being partially exposed, affecting the subsequent assembly of the terminal with other parts. If the depth Y1 of the first receiving groove 4 is too large, such as if the depth Y1 of the first receiving groove 4 exceeds 0.5 mm, the structural strength of the terminal will be greatly weakened, reducing the overall structural stability. The excessive depth Y1 of the first receiving groove 4 will also result in an excessively large space within the groove. Even if the weld mark is fully accommodated, there will still be a lot of excess space, resulting in a waste of space size.

[0054] Optionally, the value of the depth Y1 can be any value among 0.2 mm, 0.21 mm, 0.33 mm, 0.44 mm, 0.5 mm, etc., or a value between any two values.

[0055] In some embodiments, combined Figure 2 As shown, the second receiving groove 5 has a width L2 in the radial direction, wherein the value range of L2 is 0.5mm≤L2≤1mm.

[0056] It should be noted that the sizes of the first receiving groove 4 and the second receiving groove 5 can be set independently, that is, the value of the width L2 of the second receiving groove 5 can be the same as or different from the value of the width L1 of the first receiving groove 4 .

[0057] In this embodiment, the width L2 of the second accommodating groove 5 in the radial direction is in the range of 0.5 mm ≤ L1 ≤ 1 mm. This configuration can ensure that the weld mark is accommodated and prevent the weld mark from affecting the subsequent assembly of the pole with other parts, while not excessively weakening the strength of the pole, ensuring the stability of the overall structure and avoiding space waste.

[0058] Optionally, the value of the width L2 can be any value among 0.5 mm, 0.51 mm, 0.63 mm, 0.84 mm, 1 mm, etc., or a value between any two values.

[0059] In some embodiments, combined Figure 2 As shown, the depth of the second receiving groove 5 in the axial direction is Y2, wherein the value range of Y2 is 0.2mm≤Y2≤0.5mm.

[0060] It should be noted that the depth Y2 of the second receiving groove 5 may be the same as or different from the depth Y1 of the first receiving groove 4 .

[0061] In this embodiment, the depth Y2 of the second accommodating groove 5 in the axial direction is in the range of 0.2 mm ≤ Y1 ≤ 0.5 mm. This setting can ensure that the weld mark is fully accommodated and prevent the weld mark from affecting the subsequent assembly of the pole with other parts, while not excessively weakening the strength of the pole, ensuring the stability of the overall structure and avoiding space waste.

[0062] Optionally, the value of the depth Y2 can be any value among 0.2 mm, 0.21 mm, 0.33 mm, 0.44 mm, 0.5 mm, etc., or a value between any two values.

[0063] In some embodiments, combined Figure 1 As shown, the thickness of the third sub-pole 3 in the axial direction is H1, wherein the value range of H1 is 0.5 mm≤H1≤2 mm.

[0064] In this embodiment, the thickness H1 of the third sub-pole 3 in the axial direction is in the range of 0.5 mm ≤ H1 ≤ 2 mm. This configuration can ensure sufficient connection strength between the first sub-pole 1 and the second sub-pole 2 and the third sub-pole 3, while avoiding occupying too much space in the mounting groove 21 and affecting the stability of the overall structure.

[0065] Specifically, if the thickness H1 of the third sub-pole 3 is too small, such as the thickness H1 of the third sub-pole 3 is less than 0.5 mm, the fixing strength of the third sub-pole 3 is insufficient, and it is difficult to effectively and stably limit the connection between the first sub-pole 1 and the second sub-pole 2 and the third sub-pole 3. In addition, the stability of the welding fixation of the third sub-pole 3 and the second sub-pole 2 will be affected; if the thickness H1 of the third sub-pole 3 is too large, such as the thickness H1 of the third sub-pole 3 exceeds 2 mm, the third sub-pole 3 will occupy too much space in the mounting groove 21, which will increase the cost on the one hand, and on the other hand, when the depth of the mounting groove 21 remains unchanged, it will affect the thickness of the connecting portion 12, thereby affecting the structural strength of the connecting portion 12.

[0066] Optionally, the thickness H1 may be any value among 0.5 mm, 0.51 mm, 0.93 mm, 1.54 mm, 2 mm, etc., or a value between any two values.

[0067] In some embodiments, combined Figure 2 As shown, in the axial direction, the penetration depth H3 of the weld 6 exceeds the thickness H1 of the third sub-pole 3 by a distance of Δ H, satisfies 0.3mm≤ΔH≤1mm.

[0068] It should be noted that the penetration depth H3 of the weld 6 refers to the depth formed by the melting of the base material (the workpiece being welded) due to heat during welding, that is, the vertical distance from the root of the weld 6 to the surface of the base material. For example, in this embodiment, the third sub-pole 3 and the second sub-pole 2 are base materials, and the penetration depth H3 of the weld 6 is the distance from the bottom of the weld 6 to the second side surface 32 or the first surface 22.

[0069] Specifically, the penetration depth H3 of the weld 6 is greater than the thickness H1 of the third sub-pole 3. This setting ensures that the weld 6 completely penetrates the third sub-pole 3, thereby forming a full penetration weld 6, ensuring sufficient connection strength between the second sub-pole 2 and the third sub-pole 3.

[0070] Furthermore, the penetration depth H3 of the weld 6 exceeds the thickness H1 of the third sub-pole 3 by a distance Δ The value range of H is 0.3mm≤ΔH≤1mm. This setting can not only ensure sufficient connection strength but also avoid material waste and structural deformation due to excessive melting.

[0071] It can be understood that ΔH=H3-H1.

[0072] Specifically, if the penetration depth H3 of the weld 6 exceeds the thickness H1 of the third sub-pole 3 Δ The value of H is too small, such as Δ If H is less than 0.3 mm, the penetration of the weld 6 relative to the third sub-pole 3 is small, making it difficult to form a stable weld 6 at the third sub-pole 3, affecting the connection strength; if the penetration depth H3 of the weld 6 exceeds the thickness H1 of the third sub-pole 3, Δ The value of H is too large, such as Δ If H exceeds 1 mm, the weld 6 penetrates too deeply, which may easily lead to excessive melting of the material of the third sub-pole 3, resulting in material waste and structural deformation at the weld, affecting the welding quality.

[0073] Optionally, the value of ΔH may be any value among 0.3 mm, 0.31 mm, 0.53 mm, 0.74 mm, 1 mm, etc., or a value between any two values.

[0074] In some embodiments, combined Figure 1 As shown, along the radial direction, the diameter of the column 11 is D1, wherein the value range of D1 is 3mm≤D1≤15mm.

[0075] In this embodiment, the diameter D1 of the column 11 is in the range of 3 mm ≤ D1 ≤ 15 mm. This configuration can ensure that the pole has sufficient structural strength while avoiding material waste due to an excessively large diameter.

[0076] Specifically, if the diameter D1 of the column 11 is too small, such as if the diameter D1 of the column 11 is less than 3 mm, the cross-sectional area of ​​the column 11 is insufficient, and thus the tensile strength of the column 11 is insufficient. When the pole is in use, the column 11 is easily broken under the action of the rebound force of other components such as the sealing ring, or when the battery pack is subjected to vibration or pulling. If the diameter D1 of the column 11 is too large, such as if the diameter D1 of the column 11 exceeds 15 mm, the cross-sectional area of ​​the column 11 is too large, resulting in material waste, and taking up too much space, affecting the overall weight distribution of the battery pack.

[0077] Optionally, the value of the diameter D1 can be any value among 3 mm, 6 mm, 10 mm, 14 mm, 15 mm, etc., or a value between any two values.

[0078] In some embodiments, combined Figure 1 As shown, the diameter of the connecting portion 12 is D2, wherein the value range of (D2-D1) is 1.5mm≤(D2-D1)≤3mm.

[0079] In this embodiment, the difference (D2-D1) between the diameter D2 of the connecting portion 12 and the diameter D1 of the column 11 is in the range of 1.5 mm ≤ (D2-D1) ≤ 3 mm. This setting can ensure good connection strength between the first sub-pole 1 and the second sub-pole 2 and the third sub-pole 3, ensure smooth welding, and avoid material waste.

[0080] Specifically, if the difference (D2-D1) between the diameter D2 of the connecting portion 12 and the diameter D1 of the column 11 is too small, such as the difference (D2-D1) between the diameter D2 of the connecting portion 12 and the diameter D1 of the column 11 is less than 1.5 mm, the contact area between the step surface 13 and the third sub-pole 3 is insufficient, affecting the connection strength, and when welding, a pressing tool such as a protective cover is required to be pressed on the second side surface 32 of the third sub-pole 3. 1 is too small, it will affect the setting position of the clamping tool, resulting in no placement space for the clamping tool. The clamping tool is an existing component and will not be described here; if the difference (D2-D1) between the diameter D2 of the connecting part 12 and the diameter D1 of the column 11 is too large, such as the difference (D2-D1) between the diameter D2 of the connecting part 12 and the diameter D1 of the column 11 exceeds 3mm, the diameter of the connecting part 12 will be too large, resulting in material waste and increased cost.

[0081] Optionally, the difference (D2-D1) between the diameter D2 of the connecting portion 12 and the diameter D1 of the column 11 may be any value among 1.5 mm, 1.51 mm, 1.8 mm, 2.3 mm, 3 mm, etc., or a value between any two values.

[0082] In some embodiments, combined Figure 1 As shown, the thickness of the connecting portion 12 along the axial direction is H2, wherein the value range of H2 is 0.5mm≤H2≤1.5mm.

[0083] Specifically, if the thickness H2 of the connecting portion 12 is too small, such as the thickness H2 of the connecting portion 12 is less than 0.5 mm, the structural strength of the connecting portion 12 is insufficient, and when the pole is in use, when the battery pack is subjected to vibration and pulling, the connecting portion 12 is prone to deformation; if the thickness H2 of the connecting portion 12 is too large, such as the thickness H2 of the connecting portion 12 exceeds 1.5 mm, the connecting portion 12 occupies too much space in the mounting groove 21, and when the depth of the mounting groove 21 remains unchanged, the design thickness of the connecting portion 12 is affected, thereby affecting the connection stability between the first sub-pole 1, the second sub-pole 2 and the third sub-pole 3.

[0084] The specific production process of the pole is as follows: the metal aluminum material is processed and formed to obtain a first sub-pole 1 having a column 11 and a connecting portion 12; the metal copper material is processed and formed to obtain a second sub-pole 2 having a mounting groove 21; the metal copper material is processed and formed to obtain a third sub-pole 3 having a through hole 33; the connecting portion 12 of the first sub-pole 1 is inserted into the mounting groove 21 of the second sub-pole 2, the outer peripheral side of the connecting portion 12 is in contact with the inner wall 23 of the groove, and the end of the connecting portion 12 away from the column 11 is in contact with the bottom wall of the mounting groove 21; the step surface 13 is in the mounting groove 21; the third sub-pole 3 is sleeved on the column 11, and the first side surface 31 of the third sub-pole 3 is in contact with the step surface 13, and the outer peripheral side of the third sub-pole 3 is in contact with the inner wall 23 of the groove; above, the first sub-pole 1, the second sub-pole 2 and the third sub-pole 3 are preliminarily matched together. A first accommodating groove 4 is recessed at a position near the weld 6 on the first surface 22, and a second accommodating groove 5 is recessed at a position near the weld 6 on the second side surface 32; at a position where the outer peripheral side of the third sub-pole 3 and the inner wall 23 of the groove are in contact with each other, laser welding is performed to fix the third sub-pole 3 and the second sub-pole 2, and the first accommodating groove 4 and the second accommodating groove 5 accommodate the weld mark. The third sub-pole 3 limits and fixes the first sub-pole 1 between the third sub-pole 3 and the second sub-pole 2 to form a stable pole as a whole.

[0085] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Although the embodiments of the present invention have been described with reference to the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the present invention.

Claims

1. A pole, characterized in that: include: A first sub-pole, comprising a column and a connecting portion; the connecting portion is connected to a first end of the column in the axial direction; the connecting portion is radially protruding relative to the column to form a step surface between the connecting portion and the column; The second sub-pole has a first surface, and a mounting groove is formed in the first surface so that the second sub-pole surrounds the mounting groove to form an inner wall of the groove, and the connecting portion is inserted into the mounting groove; The third sub-pole is sleeved on the column and abuts against the step surface. The third sub-pole is welded to the second sub-pole.

2. The pole according to claim 1, characterized in that The third sub-pole is located in the mounting groove, and the outer circumference of the third sub-pole is arranged in contact with the inner wall of the groove; The third sub-pole has a first side surface and a second side surface that are axially opposite to each other. The first side surface abuts against the step surface, and the second side surface is flush with the first surface.

3. The pole according to claim 2, characterized in that Welding the outer circumference of the third sub-pole to the inner wall of the slot at a fitting position to form a weld; The first surface is recessed at a position close to the weld to form a first receiving groove; The second side surface is recessed with a second accommodating groove at a position close to the welding seam, and the second accommodating groove is correspondingly connected to the first accommodating groove.

4. The pole according to claim 3, characterized in that The width of the first accommodating groove in the radial direction is L1, wherein the value range of L1 is 0.5mm≤L1≤1mm; and / or, The depth of the first accommodating groove in the axial direction is Y1, wherein the value range of Y1 is 0.2mm≤Y1≤0.5mm.

5. The pole according to claim 3, characterized in that: The second receiving groove has a radial width L2, wherein the value range of L2 is 0.5 mm ≤ L2 ≤ 1 mm; and / or, The depth of the second receiving groove in the axial direction is Y2, wherein the value range of Y2 is 0.2mm≤Y2≤0.5mm.

6. The pole according to claim 3, characterized in that The thickness of the third sub-pole in the axial direction is H1, wherein the value range of H1 is 0.5 mm ≤ H1 ≤ 2 mm.

7. The pole according to claim 6, characterized in that In the axial direction, the distance that the penetration depth H3 of the weld exceeds the thickness H1 of the third sub-pole is Δ H, satisfies 0.3mm≤ΔH≤1mm.

8. The pole according to any one of claims 1 to 7, characterized in that Along the radial direction, the diameter of the column is D1, wherein the value range of D1 is 3mm≤D1≤15mm.

9. The pole according to claim 8, characterized in that The diameter of the connecting portion is D2, wherein the value range of (D2-D1) is 1.5mm≤(D2-D1)≤3mm.

10. The pole according to any one of claims 1 to 7, characterized in that Along the axial direction, the thickness of the connecting portion is H2, wherein the value range of H2 is 0.5mm≤H2≤1.5mm.

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