Pole and battery

Abstract

The invention relates to the technical field of battery structures, and discloses a post terminal and a battery, the post terminal comprises: a post terminal body, the post terminal body comprises a first metal post and a second metal post, the second metal post is arranged in a protruding manner relative to the first metal post along the radial direction; the pole body further comprises a third metal column; the third metal column is connected to one end, far away from the first metal column, of the second metal column; the insulating part is arranged on the peripheral sides of the second metal column and the third metal column in a sleeving manner; according to the pole and the battery provided by the invention, the pole body can be directly formed by punching the copper-aluminum composite plate without complicated processing procedures, and the third metal column which is different from the first metal column in metal material is connected to one side, deviating from the first metal column, of the second metal column, so that the joint surfaces of the second metal column and the third metal column are prevented from being pulled.

Description

Technical Field

[0001] The present invention relates to the technical field of battery structures, and in particular to a pole and a battery. 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] The pole includes a column part and a plate part. When the pole is in use, the column part of the pole is fixed to the top cover, and the plate part is fixed to the lower plastic part.

[0004] In the related art, poles are often produced by friction welding. However, when the poles are produced by friction welding, the workpieces, such as the aluminum rod and the copper base plate, rotate at a relatively high speed to generate heat, which in turn causes the aluminum rod and the copper base plate to be welded together. The welding process is complicated, affecting production efficiency. In addition, the joint surface between the aluminum rod and the copper base plate is often located at the column part of the pole. When the top cover is subjected to an external force, the force acts on the column part of the pole, causing tension between the copper and aluminum joint surfaces of the pole. After a long period of action, there is a risk of breaking the pole. Summary of the Invention

[0005] In view of this, the present invention provides a pole and a battery to solve the problem that when the pole is produced by friction welding, the processing process is complicated, which affects the production efficiency, and when the pole obtained by the processing is used, the copper-aluminum joint surface of the pole will be subjected to tension, which easily causes the pole to break.

[0006] In a first aspect, the present invention provides a pole, comprising: a pole body, the pole body comprising a first metal column and a second metal column connected to one axial end of the first metal column, the second metal column being radially protruding relative to the first metal column; the pole body further comprising a third metal column, the third metal column being connected to one end of the second metal column away from the first metal column; and an insulating member being sleeved on the outer peripheral side of the second metal column and the third metal column being axially arranged around them.

[0007] Beneficial effects: By arranging a matched pole body and an insulating member, the pole body includes a first metal post, a second metal post and a third metal post, the first metal post serves as the pole body portion, the second metal post and the third metal post serve as the plate portion of the pole, the pole body can be directly stamped and formed using a copper-aluminum composite plate, without the need for additional processing steps, a pole with basic structural characteristics can be initially obtained, and the processing is simple and the production efficiency is high; furthermore, the insulating member can be combined with the pole body through an integral injection molding process to obtain a pole product; the processing process of the entire pole is simple, without the need for complex production steps, replacing the complex processing method during friction welding production, and the production efficiency is high; furthermore, the first end of the second metal post along the axial direction is connected to the first The metal pillars are connected, and the second end of the second metal pillar is connected to the third metal pillar along the axial direction, so that the third metal pillar with a metal material different from that of the first metal pillar is connected to the side of the second metal pillar away from the first metal pillar. At the same time, the joint surface between the third metal pillar and the second metal pillar is located at the plate part of the pole. When the column part of the pole is subjected to the force transmitted by the top cover, on the one hand, the joint surface between the second metal pillar and the third metal pillar is prevented from being subjected to tension, effectively preventing the pole from being broken or damaged. On the other hand, the first metal pillar is a column of a single complete material, with high structural strength and no material joint surface. Compared with the pole obtained by the friction welding processing method in the prior art, its material joint surface is located at the column part, which can effectively bear the tension, thereby improving the force-bearing performance and service life of the pole.

[0008] In an optional embodiment, the volume of the first metal column is V1, the volume of the second metal column is V2, and the volume of the third metal column is V3, satisfying 0.1≤V3 / (V1+V2+V3)≤0.5.

[0009] Beneficial effect: In the pole body, the ratio of the volume of the third metal column to the overall volume of the pole body affects the connection strength between the second metal column and the third metal column; the ratio of the volume V3 of the third metal column to the overall volume of the pole body (V1+V2+V3) is selected within the range of 0.1≤V3 / (V1+V2+V3)≤0.5, thereby ensuring the connection stability between the second metal column and the third metal column at the joint surface and ensuring that the structural strength of the pole meets the requirements.

[0010] In an optional embodiment, the insulating part includes a base and a first clamping portion and a second clamping portion connected to the base at intervals; a recess is formed between the first clamping portion, the second clamping portion and the base; the first clamping portion is connected to the second metal column, the second clamping portion is connected to the third metal column, and at least part of the column of the second metal column and the third metal column is inserted into the recess.

[0011] Beneficial effect: The insulating part includes a base and a first clamping part and a second clamping part connected to the base at intervals, and a recess is formed between the first clamping part, the second clamping part and the base, so that at least part of the columns on the peripheral side of the second metal column and the third metal column can be inserted into the recess, which plays an effective insulating and protective role, effectively avoiding galvanic corrosion between the second metal column and the third metal column, and the insulating part and the pole body are stably connected by means of the plug-in cooperation between the recess and at least part of the columns on the peripheral side of the pole, preventing the insulating part from shifting or even falling off during use, avoiding affecting the normal use of the pole, and improving the service life of the pole.

[0012] In an optional embodiment, the second metal column forms a first surface on a side close to the first metal column, and the third metal column forms a second surface on a side away from the second metal column; the first surface is recessed with a first recess at a position away from the edge of a side of the first metal column, and the first clamping portion is connected to the first recess, so that the side of the first clamping portion facing away from the recess is flush with the first surface; the second surface is recessed with a second recess at a position close to the edge, and the second clamping portion is connected to the second recess, so that the side of the second clamping portion facing away from the recess is flush with the second surface.

[0013] Beneficial effects: The first clamping portion is engaged with the first recess, and the first clamping portion is in contact with the first recess along the first side in the axial direction, and the first clamping portion is flush with the first surface along the second side in the axial direction. The second clamping portion is engaged with the second recess in the same manner as above, so that the surfaces of the column part of the pole on both sides along the axial direction are flat, avoiding affecting the assembly of the pole and the lower plastic part. At the same time, the upper side surface of the first clamping portion is flush with the first surface, and can also be accurately aligned during the assembly process of the insulating part and the pole body. Workers can judge whether the installation is in place based on whether the upper side surface of the first clamping portion is aligned with the first surface, thereby improving assembly accuracy and efficiency, eliminating the need for complex positioning tools, and reducing production costs.

[0014] In an optional embodiment, the second metal pillar forms a first groove bottom wall at the bottom of the first recess, and the third metal pillar forms a second groove bottom wall at the bottom of the second recess; the second metal pillar forms a first joint surface at the connection position with the third metal pillar, and the third metal pillar forms a second joint surface at the connection position with the second metal pillar; along the axial direction, the distance between the first groove bottom wall and the first joint surface is h1, and the distance between the second groove bottom wall and the second joint surface is h2; wherein, the distance h1 and the distance h2 satisfy 0.5≤h2 / (h1+h2)≤0.8.

[0015] In an optional embodiment, along the axial direction, the height of the third metal column is H2, wherein the value range of H2 is 0.5mm≤H2≤1.5mm; along the axial direction, the height of the second metal column is H1, satisfying 0.8mm≤(H1+H2)≤2mm.

[0016] Beneficial effect: The value range of the height H2 of the third metal column is 0.5mm≤H2≤1.5mm. With this setting, on the one hand, it is ensured that the third metal column has a sufficient height so that the structural strength of the third metal column meets the requirements, and it is prevented that the pole column is penetrated by the deep welding when the pole ear or connecting plate is subsequently welded in the cover plate due to the height of the third metal column being too small; on the other hand, it avoids the waste of materials due to the height of the third metal column being too high, thereby affecting the production cost; the height H1 of the second metal column and the height H2 of the third metal column meet 0.8mm≤(H1+H2)≤2mm. With this setting, on the one hand, it avoids the thickness of the plate part of the pole column being too thin, which causes the pole column to be easily deformed under the rebound force of the sealing ring, and ensures that the pole column meets the tensile requirements in the battery pack, and on the other hand, it avoids the waste of materials due to the plate part of the pole column being too thick, thereby affecting the production cost.

[0017] In an optional embodiment, the distance h1 between the first joint surface of the bottom wall of the first groove and the height H1 of the second metal column satisfies 0.5mm≤(H1-h1)≤1mm; the distance h2 between the second joint surface of the bottom wall of the second groove and the height H2 of the third metal column satisfies 0.5mm≤(H2-h2)≤1mm.

[0018] Beneficial effect: The difference (H1-h1) between the height H1 and the spacing h1 is the axial depth dimension of the first recess, and the difference (H2-h2) between the height H2 and the spacing h2 is the axial depth dimension of the second recess. The difference (H1-h1) satisfies 0.5mm≤(H1-h1)≤1mm. This arrangement, on the one hand, avoids the difficulty in molding the insulating part in the one-piece injection molding process due to the first recess being too small in the axial direction, thereby affecting the production efficiency and quality of the pole; on the other hand, it avoids the depth of the first recess being too large in the axial direction, thereby occupying too much axial space of the second metal column and affecting the structural strength of the second metal column.

[0019] In an optional embodiment, along the radial direction, the diameter of the second metal column is D1, and the second metal column surrounds the first recess to form a groove inner wall; the diameter of the column enclosed by the groove inner wall is d, satisfying 0.5mm≤(D1-d) / 2≤2mm.

[0020] In an optional embodiment, along the radial direction, the diameter of the first metal column is D2, wherein the value range of D2 is 3mm≤D2≤15mm; along the axial direction, the height of the first metal column is H3, wherein the value range of H3 is 3mm≤H3≤6mm.

[0021] In an optional embodiment, the first clamping portion is disposed in contact with the first surface; and / or the second clamping portion is disposed in contact with the second surface.

[0022] In a second aspect, the present invention provides a battery comprising a terminal as described in any one of the above items. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] 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.

[0024] Figure 1 is a schematic diagram of a pole body of the present invention;

[0025] Figure 2 is a schematic cross-sectional view of a pole according to the present invention;

[0026] Figure 3 Schematic diagram of the explosion of the pole of the present invention;

[0027] Figure 4 Schematic diagram of the structure of the pole of the present invention;

[0028] Figure 5 is a schematic diagram of an embodiment of a pole of the present invention;

[0029] Figure 6 is a schematic diagram of another embodiment of a pole of the present invention;

[0030] Figure 7 FIG. 1 is a schematic diagram of another embodiment of a pole according to the present invention.

[0031] Description of reference numerals:

[0032] 1. Pole body; 11. First metal column; 12. Second metal column; 121. First joint surface; 13. Third metal column; 131. Second joint surface; 2. Insulator; 21. First clamping portion; 22. Second clamping portion; 23. Base; 24. Notch; 3. First surface; 31. First recess; 311. First slot bottom wall; 312. Slot inner wall; 4. Second surface; 41. Second recess; 411. Second slot bottom wall. DETAILED DESCRIPTION

[0033] 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.

[0034] 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.

[0035] 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.

[0036] 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.

[0037] The following combination Figures 1 to 7 , describing embodiments of the present invention.

[0038] According to an embodiment of the present invention, on the one hand, a pole is provided, comprising: a pole body 1, the pole body 1 comprising a first metal post 11 and a second metal post 12 connected to one axial end of the first metal post 11, the second metal post 12 being radially protruding relative to the first metal post 11; the pole body 1 further comprising a third metal post 13, the third metal post 13 being connected to one end of the second metal post 12 away from the first metal post 11; and an insulating member 2 being sleeved on an outer peripheral side of the second metal post 12 and the third metal post 13 arranged axially around them.

[0039] It should be noted that the electrode can be but is not limited to a negative electrode.

[0040] It should be noted that the first metal column 11 serves as the column portion of the pole, and the second metal column 12 and the third metal column 13 serve as the plate portion of the pole.

[0041] Specifically, the second metal column 12 and the third metal column 13 are made of different metal materials, the second metal column 12 and the first metal column 11 are made of the same metal material, and the second metal column 12 and the first metal column 11 are integrally arranged; wherein, the second metal column 12 and the first metal column 11 are both made of metal aluminum, and the third metal column 13 is made of metal copper.

[0042] Specifically, the material of the insulating part 2 can be PPS, which refers to polyphenylene sulfide and is a high-performance engineering plastic with good insulation properties. Since the potentials of metal copper and metal aluminum are different, and the electrolyte is easy to penetrate into the peripheral side of the pole during use, the insulating part 2 is provided, and the insulating part 2 is connected to the outer peripheral side of the second metal column 12 and the third metal column 13 to prevent galvanic corrosion between the second metal column 12 and the third metal column 13. Galvanic corrosion refers to the local corrosion phenomenon caused by the contact of metals or materials with different potentials in the same medium, so as to avoid affecting the normal use of the pole.

[0043] Furthermore, the pole body 1 can be formed by direct stamping of a copper-aluminum composite plate without the need for additional processing steps such as turning; the insulating part 2 can be combined with the pole body 1 through an integrated injection molding process, thereby directly obtaining a pole product. The processing process is simple and does not require complex production steps, replacing the complex processing method during friction welding production, and has high production efficiency.

[0044] In this embodiment, by setting a matching pole body 1 and an insulating member 2, the pole body 1 includes a first metal column 11, a second metal column 12 and a third metal column 13, the first metal column 11 serves as the column part of the pole, the second metal column 12 and the third metal column 13 serve as the plate part of the pole, and the pole body 1 can be directly stamped and formed by a copper-aluminum composite plate. Without the need for additional processing steps, a pole with basic structural characteristics can be preliminarily obtained, and the processing process is simple and the production efficiency is high; further, the insulating member 2 can be combined with the pole body 1 through an integral injection molding process to obtain a pole product; the processing process of the entire pole is simple, without the need for complex production steps, replacing the complex processing method during friction welding production, and the production efficiency is high; further, since the first end of the second metal column 12 along the axial direction is connected to the first metal column 12, the first end of the second metal column 12 along the axial direction is connected to the first metal column 12, and the first end of the second metal column 12 along the axial direction is connected to the first metal column 12. The first metal post 11 is connected to the second metal post 12, and the second end of the second metal post 12 along the axial direction is connected to the third metal post 13, so that the third metal post 13 having a metal material different from that of the first metal post 11 is connected to the side of the second metal post 12 away from the first metal post 11. At the same time, the joint surface between the third metal post 13 and the second metal post 12 is located at the plate part of the pole. When the column part of the pole is subjected to the force transmitted by the top cover, on the one hand, the joint surface between the second metal post 12 and the third metal post 13 is prevented from being subjected to tension, effectively preventing the pole from being broken or damaged. On the other hand, the first metal post 11 is a column of a single complete material, with high structural strength and no material joint surface. Compared with the pole obtained by the friction welding processing method in the prior art, its material joint surface is located at the column part, which can effectively bear the tension, thereby improving the force performance and service life of the pole.

[0045] Optional, combined Figure 3 As shown, in this embodiment, the shape of the first metal column 11 is a cylinder. In other embodiments, the shape of the first metal column 11 can also be, but not limited to, other shapes such as a prism, which can be determined according to different usage requirements in actual situations.

[0046] In some embodiments, combined Figure 2 As shown, the volume of the first metal pillar 11 is V1, the volume of the second metal pillar 12 is V2, and the volume of the third metal pillar 13 is V3, satisfying 0.1≤V3 / (V1+V2+V3)≤0.5.

[0047] Specifically, in the pole body 1, the ratio of the volume of the third metal column 13 to the overall volume of the pole body 1 affects the connection strength between the second metal column 12 and the third metal column 13; in this embodiment, the ratio of the volume V3 of the third metal column 13 to the overall volume of the pole body 1 (V1+V2+V3) is selected within the range of 0.1≤V2 / (V1+V2+V3)≤0.5, ensuring the connection stability between the second metal column 12 and the third metal column 13 at the joint surface, so that the structural strength of the pole meets the requirements.

[0048] Specifically, if the volume proportion of the third metal column 13 relative to the overall volume of the pole body 1 is too high, such as higher than 50%, that is, V3 / (V1+V2+V3)>0.5, during use, due to the differences in physical properties of metal copper and metal aluminum, such as different thermal expansion coefficients, the second metal column 12, the third metal column 13 and the first metal column 11 will expand and contract due to temperature changes. Since the proportion of the third metal column 13 is relatively large, a large internal stress is generated at the copper-aluminum interface. The large internal stress will cause cracks at the copper-aluminum interface, thereby greatly weakening the connection stability of the second metal column 12 and the third metal column 13 at the joint surface; during production, if the volume proportion of the third metal column 13 relative to the overall volume of the pole body 1 exceeds 50%, the thickness of the copper layer in the copper-aluminum composite plate used in stamping is too large, affecting the bonding strength between the copper layer and the aluminum layer in the composite plate, and thus affecting the bonding strength between the second metal column 12 and the third metal column 13.

[0049] Specifically, if the volume proportion of the third metal column 13 relative to the overall volume of the pole body 1 is too low, such as less than 10%, that is, V3 / (V1+V2+V3)<0.1, during use, due to the small volume proportion of the third metal column 13, the bearing capacity of the third metal column 13 is weak, and a large number of cracks are easily generated at the third metal column 13, thereby affecting the bonding between the second metal column 12 and the third metal column 13; during production, if the volume proportion of the third metal column 13 relative to the overall volume of the pole body 1 is less than 10%, the thickness of the copper layer in the copper-aluminum composite plate used for stamping is too thin, affecting the bonding force between the copper layer and the aluminum layer in the composite plate, thereby affecting the bonding strength between the second metal column 12 and the third metal column 13.

[0050] In some embodiments, combined Figure 2 As shown, the insulating part 2 includes a base 23 and a first clamping portion 21 and a second clamping portion 22 spaced apart and connected to the base 23; a recess 24 is formed between the first clamping portion 21, the second clamping portion 22 and the base 23; the first clamping portion 21 is connected to the second metal column 12, the second clamping portion 22 is connected to the third metal column 13, and at least part of the column of the second metal column 12 and the third metal column 13 is inserted into the recess 24.

[0051] Specifically, the insulating part 2 is arranged around the peripheral column of the second metal column 12 and the third metal column 13, and the first clamping portion 21 is connected to the second metal column 12, the second clamping portion 22 is connected to the third metal column 13, and the base 23 is fitted on the outer peripheral wall of the second metal column 12 and the third metal column 13. At least part of the column of the second metal column 12 and the third metal column 13 is inserted into the recess 24, so that the insulating part 2 is connected to the outer peripheral side of the second metal column 12 and the third metal column 13, effectively preventing galvanic corrosion between the second metal column 12 and the third metal column 13.

[0052] In this embodiment, the insulating member 2 includes a base 23 and a first clamping portion 21 and a second clamping portion 22 spaced apart and connected to the base 23, and a recess 24 is formed between the first clamping portion 21, the second clamping portion 22 and the base 23, so that at least part of the columns on the peripheral side of the second metal column 12 and the third metal column 13 can be inserted into the recess 24, thereby playing an effective role in insulation and protection, effectively avoiding galvanic corrosion between the second metal column 12 and the third metal column 13, and the insulating member 2 and the pole body 1 are stably connected by means of the plug-in cooperation with at least part of the columns on the peripheral side of the pole through the recess 24, thereby preventing the insulating member 2 from shifting or even falling off during use, avoiding affecting the normal use of the pole and improving the service life of the pole.

[0053] In some embodiments, combined Figure 1 As shown, the second metal pillar 12 forms a first surface 3 on a side close to the first metal pillar 11, and the third metal pillar 13 forms a second surface 4 on a side away from the second metal pillar 12; the first surface 3 is recessed at a position away from the edge of a side of the first metal pillar 11 to provide a first recess 31, and the first clamping portion 21 is connected to the first recess 31, so that the side of the first clamping portion 21 away from the notch 24 is flush with the first surface 3; the second surface 4 is recessed at a position close to the edge to provide a second recess 41, and the second clamping portion 22 is connected to the second recess 41, so that the side of the second clamping portion 22 away from the notch 24 is flush with the second surface 4.

[0054] In some embodiments, combined Figures 5 to 7 As shown, the first clamping portion 21 is disposed in contact with the first surface 3 ; and / or the second clamping portion 22 is disposed in contact with the second surface 4 .

[0055] Specifically, such as Figure 5 In the embodiment shown, the first surface 3 can be directly matched with the first clamping portion 21, that is, the first recess 31 is not provided on the first surface 3, the first clamping portion 21 is directly attached to the first surface 3, and the peripheral column of the second metal column 12 is all clamped in the recess 24; the first recess 31 can also be provided in a recessed position near the edge of the first surface 3, such as Figure 1 In the embodiment shown, the first clamping portion 21 is clamped in the first recess 31, and the column on the side of the second metal column 12 located relatively below the first recess 31 is clamped in the notch 24; the second clamping portion 22 cooperates with the third metal column 13 in the same manner as above, as shown in FIG. Figure 5 In the embodiment shown, the second surface 4 directly cooperates with the second clamping portion 22, that is, the second recess 41 is not provided on the second surface 4, the second clamping portion 22 is provided in close contact with the second surface 4, and the peripheral side column of the third metal column 13 is fully clamped in the recess 24; Figure 1 and Figure 6In the embodiment shown, the second surface 4 is recessed near the edge to form a second recess 41 , the second engaging portion 22 is engaged with the second recess 41 , and the third metal column 13 , located relatively below the second recess 41 , is engaged with the notch 24 .

[0056] Optionally, the first concave portion 31 and the second concave portion 41 may be in the shape of a rectangular groove or a groove of other shapes, or may be in the shape of a rectangular groove or a groove of other shapes. Figure 7 The inclined surface shown is inclined in the direction close to the second metal column 12; the shapes of the first recess 31 and the second recess 41 are not limited, and the shapes of the first recess 31 and the first clamping portion 21 must be compatible, and the shapes of the second recess 41 and the second clamping portion 22 must be compatible, so that the insulating member 2 can be stably connected to the second metal column 12 and the third metal column 13.

[0057] Furthermore, the first clamping portion 21 is in contact with the first recess 31 along the first axial side, and is flush with the first surface 3 along the second axial side; the second clamping portion 22 is in contact with the first recess 31 along the first axial side, and is flush with the second surface 4 along the second axial side.

[0058] Specifically, such as Figure 2 In the illustrated embodiment, the thickness of the first clamping portion 21 in the axial direction is the same as the depth of the first recess 31, the first side of the first clamping portion 21 in the axial direction is in contact with the first recess 31, and the second side of the first clamping portion 21 in the axial direction is flush with the first surface 3; the height of the second clamping portion 22 in the axial direction is the same as the depth of the second recess 41, the first side of the second clamping portion 22 in the axial direction is in contact with the first recess 31, and the second side of the first clamping portion 21 in the axial direction is flush with the second surface 4; Figure 7 In the illustrated embodiment, the axial thickness of the first clamping portion 21 gradually decreases in the direction away from the base 23, ensuring that the thickness value at any position is the same as the inclination depth of the inclined surface, so that the side of the first clamping portion 21 facing away from the inclined surface is flush with the second surface 4.

[0059] In this embodiment, the first clamping portion 21 is clamped and matched with the first recess 31, and the first clamping portion 21 is in contact with the first recess 31 on the first side along the axial direction, and the first clamping portion 21 is flush with the first surface 3 on the second side along the axial direction. The second clamping portion 22 is matched with the second recess 41 in the same manner as above, so that the surfaces of the column portion of the pole on both sides along the axial direction are flat, avoiding affecting the assembly of the pole and the lower plastic part. At the same time, the upper side surface of the first clamping portion 21 is flush with the first surface 3, and can also accurately align the insulating member 2 and the pole body 1 during the assembly process. Workers can judge whether the installation is in place based on whether the upper side surface of the first clamping portion 21 is aligned with the first surface 3, thereby improving assembly accuracy and efficiency, eliminating the need for complex positioning tools, and reducing production costs.

[0060] In some embodiments, combined Figure 2 As shown, the second metal pillar 12 forms a first groove bottom wall 311 at the bottom of the first recess 31, and the third metal pillar 13 forms a second groove bottom wall 411 at the bottom of the second recess 41; the second metal pillar 12 forms a first bonding surface 121 at the connection position with the third metal pillar 13, and the third metal pillar 13 forms a second bonding surface 131 at the connection position with the second metal pillar 12; along the axial direction, the distance between the first groove bottom wall 311 and the first bonding surface 121 is h1, and the distance between the second groove bottom wall 411 and the second bonding surface 131 is h2; wherein, the distance h1 and the distance h2 satisfy 0.5≤h2 / (h1+h2)≤0.8.

[0061] In some embodiments, combined Figure 1 As shown, along the axial direction, the height of the third metal column 13 is H2, wherein the value range of H2 is 0.5mm≤H2≤1.5mm; along the axial direction, the height of the second metal column 12 is H1, satisfying 0.8mm≤(H1+H2)≤2mm.

[0062] Specifically, the value range of the height H2 of the third metal column 13 is 0.5mm≤H2≤1.5mm. With this setting, on the one hand, it is ensured that the third metal column 13 has a sufficient height so that the structural strength of the third metal column 13 meets the requirements, and it is prevented that the pole is penetrated by the deep welding when the pole ear or connecting plate is subsequently welded in the cover plate due to the height of the third metal column 13 being too small; on the other hand, it avoids the waste of materials due to the height of the third metal column 13 being too high, thereby affecting the production cost; the height H1 of the second metal column 12 and the height H2 of the third metal column 13 meet 0.8mm≤(H1+H2)≤2mm. With this setting, on the one hand, it avoids the thickness of the plate part of the pole being too thin, which causes the pole to be easily deformed under the rebound force of the sealing ring, and ensures that the pole meets the tension requirements in the battery pack, and on the other hand, it avoids the waste of materials due to the plate part of the pole being too thick, thereby affecting the production cost.

[0063] In some embodiments, combined Figure 1 As shown, the distance h1 between the first groove bottom wall 311 and the first joint surface 121 and the height H1 of the second metal column 12 satisfy 0.5mm≤(H1-h1)≤1mm; the distance h2 between the second groove bottom wall 411 and the second joint surface 131 and the height H2 of the third metal column 13 satisfy 0.5mm≤(H2-h2)≤1mm.

[0064] Specifically, the difference (H1-h1) between the height H1 and the spacing h1 is the axial depth dimension of the first recess 31, and the difference (H2-h2) between the height H2 and the spacing h2 is the axial depth dimension of the second recess 41. The difference (H1-h1) satisfies 0.5mm≤(H1-h1)≤1mm. This setting, on the one hand, avoids the difficulty in molding the insulating part 2 in the one-piece injection molding process due to the first recess 31 being too small in the axial direction, thereby affecting the production efficiency and quality of the pole; on the other hand, it avoids the excessive axial depth of the first recess 31, which occupies too much axial space of the second metal column 12 and affects the structural strength of the second metal column 12. The reason for the value of the difference (H2-h2) is similar to that of the difference (H1-h1), which will not be elaborated here.

[0065] In some embodiments, combined Figure 2 As shown, along the radial direction, the diameter of the second metal column 12 is D1, and the second metal column 12 surrounds the first recess 31 to form a groove inner wall 312; the diameter of the column enclosed by the groove inner wall 312 is d, satisfying 0.5mm≤(D1-d) / 2≤2mm.

[0066] Specifically, the difference between the diameter D1 and the diameter d (D1-d) is the radial width dimension of the first recess 31. This setting, on the one hand, avoids the difficulty in forming the first recess 31 on the peripheral side of the second metal column 12 during stamping due to the first recess 31 being too small in radial direction, and also causes difficulty in forming the insulating part 2 in one-piece injection molding, affecting the production efficiency and quality of the pole; on the other hand, avoids the situation where the radial width dimension of the first recess 31 is too large, resulting in excessive radial space of the second metal column 12 being occupied, affecting the structural strength of the second metal column 12.

[0067] It can be understood that the diameter of the third metal column 13 is the same as the diameter of the second metal column 12, and the outer peripheral side of the third metal column 13 is aligned with the outer peripheral side of the second metal column 12; the depth dimension of the second recess 41 is the same as the depth dimension of the first recess 31, and the width dimension of the second recess 41 is the same as the width dimension of the first recess 31.

[0068] In some embodiments, combined Figure 2As shown, along the radial direction, the diameter of the first metal column 11 is D2, wherein the value range of D2 is 3mm≤D2≤15mm; along the axial direction, the height of the first metal column 11 is H3, wherein the value range of H3 is 3mm≤H3≤6mm.

[0069] Specifically, the diameter D2 of the first metal column 11 is in the range of 3mm≤D2≤15mm. On the one hand, it ensures that the column part of the pole has sufficient structural strength, and avoids the pole being easily damaged or broken when subjected to external force during use due to the diameter of the first metal column 11 being too small. On the other hand, it avoids material waste caused by the pole diameter being too large, which affects the production cost; the height H3 of the first metal column 11 is in the range of 3mm≤H3≤6mm. Such a setting, on the one hand, ensures that the column part of the pole has sufficient height, and prevents the assembly of the pole and other components from being affected by the height of the first metal column 11 being too small; on the other hand, it avoids the stress concentration at the end of the column part when the column part of the pole is subjected to force due to the height of the first metal column 11 being too high, causing local stress overload, resulting in cracks or even fracture of the pole.

[0070] It should be noted that the ratio of the volume V3 of the third metal column 13 to the overall volume of the pole body 1 (V1+V2+V3) is selected within the range of 0.1≤V3 / (V1+V2+V3)≤0.5. In this embodiment, each column segment of the pole is a cylinder, so the calculation formula of the cylinder can be used; wherein V2 is the volume of the second metal column 12, such as Figure 2 In the embodiment shown, if the second metal pillar 12 is provided with a first recess 31, V2 = π × (d / 2) 2 ×(H1-h1)+π×(D1 / 2) 2 ×h1; such as Figure 5 In the embodiment shown, if the insulating member 2 is directly attached to the first surface 3, V1 = π × (D1 / 2) 2 ×H1; the calculation method of V3 is similar to V1, such as Figure 2 In the embodiment shown, if the third metal pillar 13 is provided with a first recess 31, V3 = π × (d / 2) 2 ×(H2-h2)+π×(D1 / 2) 2 ×h2; such as Figure 5 In the embodiment shown, if the insulating member 2 is directly attached to the second surface 4, V2 = π × (D1 / 2) 2 ×H2; the volume of the first metal pillar 11 V1 =π×(D2 / 2) 2 ×H3.

[0071] According to another aspect of an embodiment of the present invention, a battery is provided, comprising a terminal as described in any one of the above items.

[0072] 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 pole body, the pole body comprising a first metal pole and a second metal pole connected to one axial end of the first metal pole, the second metal pole being radially protruding relative to the first metal pole; The pole body further includes a third metal column, the third metal column being connected to an end of the second metal column away from the first metal column; The insulating member is sleeved on the outer peripheral side of the second metal column and the third metal column which are arranged around the axial direction.

2. The pole according to claim 1, characterized in that The volume of the first metal column is V1, the volume of the second metal column is V2, and the volume of the third metal column is V3, satisfying 0.1≤V3 / (V1+V2+V3)≤0.

5.

3. The pole according to claim 1, characterized in that The insulating member includes a base and a first clamping portion and a second clamping portion connected to the base at intervals; A recess is formed between the first clamping portion, the second clamping portion and the base; The first clamping portion is connected to the second metal column, the second clamping portion is connected to the third metal column, and at least part of the second metal column and the third metal column are inserted into the recess.

4. The pole according to claim 3, characterized in that The second metal pillar forms a first surface on a side close to the first metal pillar, and the third metal pillar forms a second surface on a side away from the second metal pillar; The first surface is provided with a first recess at a position away from an edge of one side of the first metal pillar, and the first clamping portion is accommodated in the first recess, so that the side of the first clamping portion facing away from the recess is flush with the first surface; The second surface is recessed with a second recess near the edge, and the second clamping portion is connected to the second recess, so that the side of the second clamping portion facing away from the recess is flush with the second surface.

5. The pole according to claim 4, characterized in that: The second metal pillar forms a first groove bottom wall at the bottom of the first recess, and the third metal pillar forms a second groove bottom wall at the bottom of the second recess; The second metal column forms a first joint surface at a position where it connects with the third metal column, and the third metal column forms a second joint surface at a position where it connects with the second metal column; In the axial direction, the distance between the first groove bottom wall and the first joint surface is h1, and the distance between the second groove bottom wall and the second joint surface is h2; The spacing h1 and the spacing h2 satisfy 0.5≤h2 / (h1+h2)≤0.

8.

6. The pole according to claim 5, characterized in that Along the axial direction, the height of the third metal column is H2, wherein the value range of H2 is 0.5mm≤H2≤1.5mm; Along the axial direction, the height of the second metal column is H1, which satisfies 0.8 mm ≤ (H1 + H2) ≤ 2 mm.

7. The pole according to claim 6, characterized in that The distance h1 between the bottom wall of the first groove and the first joint surface and the height H1 of the second metal pillar satisfy 0.5 mm ≤ (H1-h1) ≤ 1 mm; A distance h2 between the second groove bottom wall and the second joint surface and a height H2 of the third metal pillar satisfy 0.5 mm ≤ ( H2 − h2 ) ≤ 1 mm.

8. The pole according to any one of claims 4 to 7, characterized in that: In the radial direction, the diameter of the second metal column is D1, and the second metal column surrounds the first recess to form a groove inner wall; The diameter of the column enclosed by the inner wall of the groove is d, which satisfies 0.5mm≤(D1-d) / 2≤2mm.

9. The pole according to claim 8, characterized in that In the radial direction, the diameter of the first metal column is D2, wherein the value range of D2 is 3mm≤D2≤15mm; Along the axial direction, the height of the first metal column is H3, wherein the value range of H3 is 3mm≤H3≤6mm.

10. A battery, characterized in that: The invention comprises a pole as claimed in any one of claims 1 to 9.

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