Pole assembly, battery, battery pack and electric equipment

Abstract

The invention discloses a pole assembly, a battery, a battery pack and electric equipment, and the pole assembly comprises a conductive part which is suitable for being connected with an electric lead-out part; the conductive sheath is suitable for being connected with a cover plate, the conductive sheath is arranged on the outer peripheral surface of the conductive part in a surrounding mode, the conductive sheath and the conductive part are arranged at intervals, the conductive sheath is provided with an inner surface, the outer peripheral surface and the inner surface are rough surfaces, and the inner surface and the outer peripheral surface are oppositely arranged; at least part of the insulation sealing piece is formed between the conductive piece and the conductive sheath in an injection molding mode, and the insulation sealing piece abuts against the outer circumferential face and the inner surface. According to the pole component, the assembly is simple, and the batch injection molding production is convenient.

Description

Technical Field

[0001] This invention relates to the field of battery technology, and in particular to a terminal assembly, a battery, a battery pack, and an electrical device. Background Technology

[0002] In related technologies, the cover plate and electrode conductive device of a secondary battery are generally assembled by integral injection molding. Both the electrode conductive device and the cover plate body require metal surface treatment. The cover plate is too large, the surface treatment cost is high, and the integral injection molding of the electrode conductive device and the cover plate results in a slow injection cycle and low injection efficiency, which increases the injection molding cost. Another existing technology uses a stainless steel sleeve with a glass sealing solution, and the stainless steel sleeve has flange extension and boss extension, but the process is relatively complex. Summary of the Invention

[0003] The present invention aims to at least solve one of the technical problems existing in the prior art. Therefore, one object of the present invention is to provide a pole assembly that is simple in structure and easy to assemble.

[0004] Another object of the present invention is to provide a battery.

[0005] Another object of the present invention is to provide a battery pack.

[0006] Another object of the present invention is to provide an electrical device.

[0007] According to a first aspect of the present invention, a terminal assembly for a battery includes: a conductive member adapted to be connected to an electrical lead; a conductive sheath adapted to be connected to a cover plate, the conductive sheath surrounding an outer peripheral surface of the conductive member and spaced apart from the conductive member, the conductive sheath having an inner surface, the outer peripheral surface and the inner surface being rough surfaces, the inner surface being disposed opposite to the outer peripheral surface; and an insulating sealant, at least a portion of the insulating sealant being injection molded between the conductive member and the conductive sheath, the insulating sealant abutting against the outer peripheral surface and the inner surface respectively.

[0008] According to the electrode assembly of the present invention, the conductive element and the conductive sheath are sealed and insulated by an insulating sealant, thereby achieving insulation between the battery core and the cover plate, as well as sealing during battery assembly. At least a portion of the insulating sealant is injection molded between the conductive element and the conductive sheath, and the insulating sealant abuts against both the outer peripheral surface and the inner surface, wherein both the outer peripheral surface and the inner surface are rough surfaces. During injection molding, the material of the injection molded part is more easily bonded to the rough surface, resulting in good sealing performance and high connection reliability. Furthermore, the conductive element is suitable for connection to electrical leads, and the conductive sheath is suitable for connection to the cover plate. In this way, during battery assembly, the casing can be avoided from participating in the injection molding process. Since the volume of the conductive sheath is smaller than that of the casing, space required for assembly injection molding is saved, facilitating mass injection molding production and improving efficiency.

[0009] According to some embodiments of the present invention, the outer peripheral surface has an uneven structure and a plurality of first nanopores are formed on the outer peripheral surface; and / or the inner surface has an uneven structure and a plurality of second nanopores are formed on the inner surface.

[0010] According to some embodiments of the present invention, the diameter of the first nanopore is d1, wherein d1 satisfies: 20nm≤d1≤1000nm; and / or the diameter of the second nanopore is d2, wherein d2 satisfies: 20nm≤d2≤1000nm.

[0011] According to some embodiments of the present invention, the conductive element and the conductive sheath are integrally formed.

[0012] According to some embodiments of the present invention, the insulating sealant is filled in the gap between the conductive element and the conductive sheath by injection molding.

[0013] According to some embodiments of the present invention, the conductive sleeve is disposed at the middle part of the conductive element along the length direction of the conductive element.

[0014] According to some embodiments of the present invention, in the longitudinal direction of the conductive element, the length of the conductive sheath is H1, wherein H1 satisfies: H1≥1mm.

[0015] According to some embodiments of the present invention, in the longitudinal direction of the conductive element, the two ends of the conductive sheath do not protrude beyond the two ends of the insulating seal.

[0016] According to some embodiments of the present invention, the thickness of the conductive sheath is greater than or equal to the thickness of the insulating seal in the direction opposite to the conductive element.

[0017] According to some embodiments of the present invention, the thickness of the conductive sheath is W1, wherein W1 satisfies: 0.15mm≤W1≤2mm; and / or the thickness of the insulating seal is W2, wherein W2 satisfies: 0.15mm≤W2≤1mm.

[0018] According to some embodiments of the present invention, the conductive sheath includes: a sheath body portion; and a sheath step portion, the sheath step portion being formed on the outer peripheral surface of one end of the sheath body portion and extending in a direction away from the outer peripheral surface of the one end of the sheath body portion.

[0019] According to some embodiments of the present invention, the conductive member includes: a conductive body portion; and a conductive step portion, the conductive step portion being formed on the outer peripheral surface of one end of the conductive body portion and extending in a direction away from the outer peripheral surface of the one end of the conductive body portion.

[0020] According to some embodiments of the present invention, the insulating seal includes: an insulating body portion extending in the same direction as the conductive body portion; a first insulating step portion, one end of which is connected to one end of the insulating body portion, and the other end of which extends in a direction away from the conductive element; and / or a second insulating step portion, one end of which is connected to the other end of the insulating body portion, and the other end of which extends in a direction away from the conductive element.

[0021] According to some embodiments of the present invention, along the direction away from the conductive body portion, the width L1 of the conductive step portion and the width L2 of the second insulating step portion, wherein L1 and L2 satisfy: L2≥L1; and / or along the direction away from the conductive body portion, the distance from the outer periphery of the conductive body portion to the surface of the conductive sheath away from the conductive body portion is L3, the width L4 of the first insulating step portion and the width L5 of the insulating body portion, wherein L3, L4, and L5 satisfy: L3>L4≥L5; and / or along the length direction of the conductive member, the length of the conductive sheath is H1, the minimum distance H2 from the end of the conductive sheath near the conductive step portion to the conductive step portion, and the height H3 of the insulating body portion, wherein H1, H2, and H3 satisfy: 1mm≥H2≥0.2mm, H3>H1+H2.

[0022] According to some embodiments of the present invention, a groove is formed by recessing a portion of the outer peripheral surface of the conductive member toward the interior of the conductive member; a protrusion is formed by protruding a portion of the inner surface of the insulating seal toward the conductive member, the protrusion being located in the groove.

[0023] According to some embodiments of the present invention, the conductive element is in the form of a sheet, prism, cylinder, racetrack-shaped column, or elliptical column; and / or the cross-section of the conductive sheath is in the form of a prismatic ring, circular ring, racetrack-shaped ring, or elliptical ring.

[0024] According to some embodiments of the present invention, the conductive component is at least one of aluminum, copper, nickel, iron, ferroalloy, aluminum alloy, steel-copper, and copper-nickel components; and / or the conductive sheath is at least one of aluminum, copper, nickel, iron, ferroalloy, aluminum alloy, steel-copper, and copper-nickel components; and / or the insulating sealing component is a polypropylene component and / or a polyphenylene sulfide component.

[0025] According to some embodiments of the present invention, it further includes: a first insulating film disposed on the outer peripheral surface; and a second insulating film disposed on the inner surface.

[0026] According to some embodiments of the present invention, the first insulating film comprises an aminosilane film and / or an oxide film of triazine thiol; and / or the second insulating film comprises an aminosilane film and / or an oxide film of triazine thiol.

[0027] According to a second aspect of the present invention, a battery is provided, comprising: an electrode assembly according to a first aspect of the present invention; a cover plate having a first through hole formed thereon, a portion of a conductive sheath passing through the first through hole and connected to the cover plate; and

[0028] An electrical lead-out component, the electrical lead-out component including an inner lead-out piece, the inner lead-out piece having a second through hole formed thereon, a portion of the conductive component passing through the second through hole and connected to the inner lead-out piece.

[0029] According to an embodiment of a third aspect of the present invention, the present invention provides a battery pack comprising: the battery described in an embodiment of a second aspect of the present invention.

[0030] According to an embodiment of a fourth aspect of the present invention, the present invention provides an electrical device comprising: a battery according to an embodiment of a third aspect of the present invention, or a battery pack according to an embodiment of a second aspect of the present invention.

[0031] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0032] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0033] Figure 1A process flow diagram for the fabrication of a pole assembly according to a specific embodiment of the present invention;

[0034] Figure 2 This is an example diagram of nanopores on the inner and outer peripheral surfaces of a metal surface after surface treatment, according to a specific embodiment of the present invention.

[0035] Figure 3 This is a schematic diagram of the structure of a pole assembly according to a specific embodiment of the present invention;

[0036] Figure 4 This is a structural schematic diagram (sectional view) of another pole post assembly according to a specific embodiment of the present invention;

[0037] Figure 5 This is a structural schematic diagram (sectional view) of another pole assembly according to a specific embodiment of the present invention;

[0038] Figure 6 This is a structural schematic diagram (sectional view) of another pole assembly according to a specific embodiment of the present invention;

[0039] Figure 7 According to Figure 6 A partial enlarged view of part A of the pole assembly;

[0040] Figure 8 This is a structural schematic diagram (sectional view) of another pole assembly according to a specific embodiment of the present invention;

[0041] Figure 9 This is a structural schematic diagram (sectional view) of another pole assembly according to a specific embodiment of the present invention;

[0042] Figure 10 This is a structural schematic diagram (sectional view) of another pole assembly according to a specific embodiment of the present invention;

[0043] Figure 11 This is a schematic diagram of another pole assembly according to a specific embodiment of the present invention;

[0044] Figure 12 This is a schematic diagram of another pole assembly according to a specific embodiment of the present invention;

[0045] Figure 13 This is a schematic diagram of another pole assembly according to a specific embodiment of the present invention;

[0046] Figure 14 This is a schematic diagram (cross-sectional view) of a battery according to a specific embodiment of the present invention.

[0047] Figure label:

[0048] 100: Terminal assembly; 200: Battery;

[0049] 1: Conductive component; 11: Conductive body part; 12: Conductive step part;

[0050] 2: Conductive sheath; 21: Sheath body; 22: Sheath step; 3: First insulating film; 4: Second insulating film; 6: Insulating seal; 61: Insulating body; 62: First insulating step; 63: Second insulating step; 7: Groove; 8: Protrusion; 9: Cover plate; 10: Inner lead-out piece. Detailed Implementation

[0051] The embodiments of the present invention are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. Figures 3-13 A terminal assembly 100 for a battery 200 according to a first aspect embodiment of the present invention is described in detail. The terminal assembly 100 for a battery 200 according to a specific embodiment of the present invention includes: a conductive element 1, a conductive sheath 2, and an insulating seal 6. The conductive element 1 is adapted to be connected to an electrical lead, enabling conductive connection between the electrical lead and the outside. The conductive sheath 2 is adapted to be connected to a cover plate 9. The conductive element 1 and the conductive sheath 2 are sealed and insulated by the insulating seal 6, thereby achieving insulation isolation between the electrical lead and the cover plate 9, and sealing during battery 200 assembly. The conductive sheath 2 and the cover plate 9 can be welded or bonded, but are not limited to these methods.

[0052] Furthermore, the conductive sleeve 2 surrounds the outer peripheral surface of the conductive element 1 and is spaced apart from the conductive element 1. The conductive sleeve 2 has an inner surface, and both the outer peripheral surface and the inner surface are roughened. The inner surface is positioned opposite to the outer peripheral surface. This arrangement makes it easier to further process the roughened surface. For example, it makes it easier to bond or plate the film layer on the roughened surface, or during injection molding, the material of the insulating seal 6 can penetrate into the uneven structure of the roughened surface, making it easier to connect the insulating seal 6 to the roughened surface, resulting in good sealing performance and high reliability. Thus, during battery assembly, by first surface-processing the inner surface of the conductive sleeve 2 and the outer peripheral surface of the conductive element 1 to obtain a roughened surface, and then injection molding the insulating seal 6 between the conductive sleeve 2 and the conductive element 1, sealing and insulation can be achieved. Furthermore, according to assembly requirements, the conductive sleeve 2 can be connected to the cover plate, and the conductive element 1 can be connected to the inner core. In this way, the casing can be avoided during battery assembly (200). Since the conductive sleeve 2 is smaller than the casing, space is saved during assembly and injection molding, facilitating mass production and improving efficiency. This invention obtains a rough surface by surface treating the outer and inner surfaces. A rough surface refers to a surface that is uneven and not smooth, as opposed to a smooth surface. This can be understood as the unevenness caused by small gaps and tiny peaks and valleys during product processing. Surface treatments include, but are not limited to, T-treatment and E-treatment. Further, the T-treatment process includes: water washing → alkaline washing → water washing → acid washing → water washing → 8 T-treatments → water washing → drying. The E-treatment process includes: water washing → alkaline washing → water washing → acid washing → water washing → pre-oxidation → water washing → 4 E-treatments → water washing → drying.

[0053] Furthermore, at least a portion of the insulating seal 6 is injection molded between the conductive element 1 and the conductive sheath 2, with the insulating seal 6 abutting against both the outer peripheral surface and the inner surface. In this way, during injection molding, the material of the insulating seal 6 can penetrate into the uneven structure of the rough surface, making it easier for the insulating seal 6 to connect with the rough surface, resulting in good sealing performance and high connection reliability.

[0054] According to a specific embodiment of the present invention, in the terminal assembly 100 for a battery 200, the conductive element 1 and the conductive sheath 2 are sealed and insulated by an insulating sealant 6, thereby achieving insulation between the battery 200 electrical leads and the cover plate 9, as well as sealing during battery 200 assembly. At least a portion of the insulating sealant 6 is injection molded between the conductive element 1 and the conductive sheath 2, and the insulating sealant 6 abuts against both the outer peripheral surface and the inner surface. Both the outer peripheral surface and the inner surface are rough surfaces, making it easier for the injection molded material to connect with the rough surfaces during injection molding, resulting in good sealing performance and high connection reliability. Furthermore, the conductive element 1 is adapted to connect with the electrical leads, and the conductive sheath 2 is adapted to connect with the cover plate 9. In this way, during battery 200 assembly, the casing can be avoided from participating in the injection molding process. Since the volume of the conductive sheath 2 is smaller than that of the casing, space required for assembly injection molding is saved, facilitating mass injection molding production and improving efficiency.

[0055] According to some embodiments of the present invention, the roughness of the rough surface is Ra, wherein, preferably, Ra satisfies: 0.5 ≤ Ra ≤ 6. With this setting, if Ra is less than 0.5, the roughness of the rough surface is small, which may make it difficult for the material of the insulating seal 6 to penetrate into the uneven structure of the rough surface, making it difficult for the insulating seal 6 to connect with the rough surface, affecting the sealing performance between the rough surface (conductive component 1, conductive sleeve 2) and the insulating seal 6, thus reducing connection reliability. If Ra is greater than 6, the roughness of the rough surface is large, which may lead to lower strength of the conductive component 1 and conductive sleeve 2 where the rough surface is located, affecting the reliability of the conductive component 1 and conductive sleeve 2. By setting Ra to satisfy 0.5 ≤ Ra ≤ 6, the roughness of the rough surface is suitable, the sealing performance between the insulating seal 6 and the rough surface is good, and the reliability of the conductive component 1 and conductive sleeve 2 is high.

[0056] According to some embodiments of the present invention, in combination Figure 1 , Figure 2 , Figure 6 and Figure 7The outer peripheral surface has an uneven structure with multiple first nanopores, and the inner surface has an uneven structure with multiple second nanopores. This design, on the one hand, creates an uneven, rough surface on both the outer and inner surfaces, facilitating the adhesion of the first insulating film 3 and the second insulating film 4. On the other hand, the insulating seal 6 can fill the first and / or second nanopores to form a physical bond, ensuring that the gap between the conductive element 1 and the conductive sheath 2 is completely filled with the insulating seal 6, achieving a strong bond and a sealing and insulating effect between the conductive element 1 and the conductive sheath 2. This eliminates the need for a separate seal, simplifying the structure of the electrode assembly 100. The first and second nanopores can be formed by metal surface treatment processes on the outer and inner surfaces. Here, the first insulating film 3 is simultaneously formed on the surface of the first nanopores, and the second insulating film 4 is simultaneously formed on the surface of the second nanopores.

[0057] According to some embodiments of the present invention, in combination Figure 2 As shown, the diameter of the first nanopore is d1, where d1 satisfies: 20nm ≤ d1 ≤ 1000nm. This configuration ensures the first nanopore has a suitable pore size, facilitating the filling of the insulating sealant 6 and the connection between the conductive element 1 and the conductive sheath 2.

[0058] According to other embodiments of the present invention, in combination Figure 2 As shown, the diameter of the second nanopore is d2, where d2 satisfies: 20nm ≤ d2 ≤ 1000nm. This configuration ensures that the first nanopore has a suitable pore size, facilitating the filling of the insulating sealant 6 and the connection between the conductive element 1 and the conductive sheath 2.

[0059] According to some embodiments of the present invention, the conductive component 1 and the conductive sheath 2 are integrally formed. With this configuration, after the conductive sheath 2 and the conductive component 1 are integrally formed, they are then welded to the main body of the cover plate 9 or the housing. That is, the main body of the cover plate 9 does not need to participate in injection molding, saving the space required for injection molding, facilitating mass injection molding production, and improving production efficiency. Optionally, the conductive component 1 and the conductive sheath 2 are integrally formed by injection molding.

[0060] According to some embodiments of the present invention, in combination Figure 8 and Figure 11 Along the length of the conductive component 1, the conductive sleeve 2 is positioned at the middle of the conductive component 1. This arrangement allows the conductive sleeve 2 to conduct electricity, and its volume is significantly smaller than that of the main body of the cover plate 9 (hereinafter, the structural component of battery 200). This facilitates the initial injection molding of the conductive sleeve 2 and the conductive component 1, followed by welding to the main body or shell of the cover plate 9, eliminating the need for the main body or shell of the cover plate 9 to participate in the injection molding process. This saves space required for injection molding of the main body or shell of the cover plate 9, facilitating mass production and improving production efficiency.

[0061] According to some embodiments of the present invention, in combination Figure 9 As shown, the length of the conductive sleeve 2 along the length of the conductive component 1 is H1, where H1 satisfies: H1 ≥ 1 mm. Optionally, the length of the conductive sleeve 2 is less than or equal to 6 mm. This configuration provides a suitable length for the conductive sleeve 2, facilitating welding or injection molding.

[0062] According to some embodiments of the present invention, in combination Figures 3-13 Along the length of the conductive component 1, the two ends of the conductive sheath 2 do not protrude beyond the two ends of the insulating seal 6. This arrangement ensures that the insulating seal 6 effectively isolates the conductive sheath 2 from the conductive component 1, maximizing its insulating protective function.

[0063] According to some embodiments of the present invention, in combination Figure 9 As shown, along the direction away from the conductive element 1, the thickness of the conductive sheath 2 is greater than or equal to the thickness of the insulating seal 6. This arrangement results in a relatively large thickness of the conductive sheath 2, facilitating the connection between the terminal assembly 100 of the battery 200 and the housing or cover plate 9.

[0064] According to some embodiments of the present invention, in combination Figure 8 As shown, the thickness W1 of the conductive sheath 2 satisfies: 0.15mm ≤ W1 ≤ 2mm. With this setting, if W1 is less than 0.15mm, the thickness of the conductive sheath 2 is too small, which may affect the conductivity of the conductive sheath 2 and the reliability of its connection with other components; if W1 is greater than 2mm, the thickness of the conductive sheath 2 is too large, resulting in a larger volume of the conductive sheath 2, which may complicate the manufacturing process of the terminal assembly 100 used in the battery 200 and affect production costs. By setting W1 to satisfy 0.15mm ≤ W1 ≤ 2mm, the thickness of the conductive sheath 2 is appropriate, resulting in good conductivity, high reliability, and a simple manufacturing process with lower costs.

[0065] According to other embodiments of the present invention, in combination Figure 9 The thickness of the insulating seal 6 is W2, where W2 satisfies the condition: 0.15mm ≤ W2 ≤ 1mm. With this setting, if W2 is less than 0.15mm, the thickness of the insulating seal 6 is too small, which may affect its insulation performance; if W2 is greater than 1mm, the thickness of the insulating seal 6 is too large, resulting in a larger volume of the insulating seal 6, which may complicate the manufacturing process of the terminal assembly 100 used in the battery 200 and affect production costs. By setting W2 to satisfy 0.15mm ≤ W2 ≤ 1mm, the thickness of the insulating seal 6 is appropriate, resulting in good conductivity, high reliability, and a simple manufacturing process with lower costs.

[0066] According to some embodiments of the present invention, in combination Figure 5 The conductive sheath 2 includes a sheath body portion 21 and a sheath step portion 22. The sheath step portion 22 is formed on the outer peripheral surface of one end of the sheath body portion 21 and extends in a direction away from the outer peripheral surface of that end of the sheath body portion 21. This configuration provides the conductive sheath 2 with a step, facilitating subsequent assembly and connection with the cover plate 9 or the housing body. However, to meet application requirements and facilitate the processing of the conductive sheath 2, the conductive sheath 2 may also omit the sheath step portion 22.

[0067] According to some embodiments of the present invention, in combination Figure 4 and Figure 10 Therefore, the conductive component 1 includes a conductive body portion 11 and a conductive step portion 12, wherein the conductive step portion 12 is formed on the outer peripheral surface of one end of the conductive body portion 11 and extends in a direction away from the outer peripheral surface of one end of the conductive body portion 11. This arrangement facilitates the assembly and connection of the terminal assembly 100 for the battery 200 with the cover plate 9 and the inner lead plate 10 in subsequent assembly processes.

[0068] According to some embodiments of the present invention, in combination Figure 4 The insulating seal 6 includes an insulating body portion 61, a first insulating step portion 62, and a second insulating step portion 63. The insulating body portion 61 extends in the same direction as the conductive body portion 11. One end of the first insulating step portion 62 is connected to one end of the insulating body portion 61, and the other end of the first insulating step portion 62 extends away from the conductive element 1. One end of the second insulating step portion 63 is connected to the other end of the insulating body portion 61, and the other end of the second insulating step portion 63 extends away from the conductive element 1. At least a portion of the second insulating step portion 62 abuts against the conductive step portion 12. This arrangement, with the first insulating step portion 62 and the second insulating step portion 63, facilitates the insulation protection and sealing of the terminal assembly 100 of the battery 200.

[0069] According to some embodiments of the present invention, such as Figure 10 As shown, along the direction away from the conductive body portion 11, the width L1 of the conductive step portion 12 and the width L2 of the second insulating step portion 63 are such that L1 and L2 satisfy: L2 ≥ L1. This arrangement ensures that the width of the second insulating step portion 63 is greater than or equal to the width of the conductive step portion 12, preventing one end of the conductive step portion 12 from protruding beyond the second insulating step portion 63. Thus, the second insulating step portion 63 can provide more adequate insulation protection for the conductive step portion 12.

[0070] According to other embodiments of the present invention, such as Figure 10As shown, along the direction away from the conductive body portion 11, the distance from the outer periphery of the conductive body portion 11 to the surface of the conductive sheath 2 away from the conductive body is L3, the width of the first insulating step portion 62 is L4, and the width of the insulating body portion 61 is L5, wherein L3, L4, and L5 satisfy: L3 > L4 ≥ L5. With this configuration, firstly, the distance from the outer periphery of the conductive body portion 11 to the surface of the conductive sheath 2 away from the conductive body is greater than the width of the first insulating step portion 62, so that at least a portion of the conductive sheath 2 is outside the coverage area of ​​the first insulating step portion 62, facilitating conductive connection between at least a portion of the conductive sheath 2 and other components; secondly, the width of the first insulating step portion 62 is greater than or equal to the width of the insulating body portion 61, so that the first insulating step portion 62 can provide insulation protection for the conductive sheath 2 within a certain range, thereby limiting the conductive connection of the conductive sheath 2.

[0071] According to other embodiments of the present invention, such as Figure 10 As shown, along the length of the conductive component 1, the length of the conductive sleeve 2 is H1, the minimum distance H2 between the end of the conductive sleeve 2 near the conductive step 12 and the conductive step 12, and the height H3 of the insulating body 61, wherein H1, H2, and H3 satisfy: 1mm ≥ H2 ≥ 0.2mm, H3 > H1 + H2. With this configuration, firstly, if H2 is less than 0.2mm, the minimum distance between the end of the conductive sleeve 2 near the conductive step 12 and the conductive step 12 is small, and the insulating seal 6 filling this position may be thin, which is not conducive to the insulating seal 6 playing its insulating protective role. If H2 is greater than 1mm, the minimum distance between the end of the conductive sleeve 2 near the conductive step 12 and the conductive step 12 is large, and the length of the conductive sleeve may be small, which is not conducive to the assembly of the conductive sleeve 2 with other components. By setting H2 to satisfy 1mm ≥ H2 ≥ 0.2mm, the minimum distance between the end of the conductive sleeve 2 near the conductive step 12 and the conductive step 12 is appropriate, resulting in good insulation protection performance of the insulating seal 6 and excellent assembly performance of the conductive sleeve 2. Secondly, by setting the height H3 of the insulating body 61 to be greater than the sum of the minimum distance H2 between the end of the conductive sleeve 2 near the conductive step 12 and the length H1 of the conductive sleeve 2, the insulating seal 6 can meet the insulation requirements between the conductive component 1 and the conductive sleeve 2, providing reliable insulation protection.

[0072] According to some embodiments of the present invention, such as Figure 8As shown, a groove 7 is formed by recessing a portion of the outer peripheral surface of the conductive element 1 toward the interior of the conductive element 1; a protrusion 8 is formed by protruding a portion of the inner surface of the insulating seal 6 toward the conductive element 1, and the protrusion 8 is located in the groove 7. With this configuration, a step is formed inside the conductive element 1, and the protrusion 8 of the insulating seal 6 matches the interior of the conductive element 1, strengthening the bonding force between the insulating seal 6 and the conductive element 1, thereby preventing the conductive element 1 from rotating or loosening.

[0073] According to some embodiments of the present invention, in combination Figures 11-13 The conductive component 1 can be in the form of a sheet, prism, cylinder, racetrack-shaped column, or elliptical column. This design allows for a variety of shapes for the conductive component 1, accommodating assembly needs of different shapes. Figure 11 The conductive element 1 of the terminal assembly 100 for battery 200 shown is sheet-shaped. Figure 12 The conductive element 1 of the terminal assembly 100 for the battery 200 shown is cylindrical. Figure 13 The conductive element 1 of the terminal assembly 100 for the battery 200 shown is a square prism. The prism shape can include, but is not limited to, triangular prisms, square prisms, rhomboid prisms, etc. The conductive element 1 can be formed by stamping, extrusion, cutting, machining, etc., but is not limited to these methods.

[0074] According to some optional embodiments of the present invention, the conductive element 1 includes a conductive body portion 11 and a plurality of conductive stepped portions 12, wherein the conductive body portion 11 and the conductive stepped portions 12 are each independently sheet-shaped, prismatic, cylindrical, racetrack-shaped columnar, or elliptical columnar. However, they are not limited thereto. That is, the conductive body portion 11 and the plurality of conductive stepped portions 12 can be arbitrarily combined in the above shapes.

[0075] According to other embodiments of the present invention, in combination Figures 11-13 The conductive sheath 2 has a cross-section that is prismatic, circular, racetrack-shaped, or elliptical. This design allows the conductive sheath 2 to have a variety of shapes, which can match the shape of the conductive component 1. Figure 11 The conductive element 1 of the terminal assembly 100 for battery 200 shown is elliptical ring-shaped. Figure 12 The conductive element 1 of the terminal assembly 100 for battery 200 shown is annular. Figure 13 The conductive element 1 of the terminal assembly 100 for the battery 200 shown is a square ring. The conductive sheath 2 can be formed by stamping, extrusion, cutting, machining, etc.

[0076] According to some optional embodiments of the present invention, in combination Figure 5 The conductive sheath 2 includes a sheath body portion 21 of the shape described above and at least one sheath step portion 22, and may also include a flange structure. However, it is not limited to this. This satisfies the assembly and conductivity requirements of the sheath.

[0077] According to some embodiments of the present invention, the conductive element 1 is at least one selected from aluminum, copper, nickel, iron, iron alloy, aluminum alloy, steel-copper, and copper-nickel. This configuration, where the conductive element 1 is a metal or alloy, provides good electrical conductivity.

[0078] According to other embodiments of the present invention, the conductive sheath 2 is at least one selected from aluminum, copper, nickel, iron, iron alloy, aluminum alloy, steel-copper, and copper-nickel components. This configuration, where the conductive sheath 2 is a metal or alloy component, provides good electrical conductivity.

[0079] According to other embodiments of the present invention, the insulating seal 6 is a polypropylene component and / or a polyphenylene sulfide component. This configuration makes the insulating seal 6 a heat-activated sealing material, exhibiting good heat-activated sealing performance. Furthermore, the insulating seal 6 can be applied between the conductive component 1 and the conductive sheath 2 in liquid or gel form. Since both the inner and outer circumferential surfaces that contact the insulating seal 6 have nanoporous structures, it is suitable for molding the insulating seal 6 with the inner and outer circumferential surfaces through nano-injection molding, curing, or other methods.

[0080] According to some embodiments of the present invention, a first insulating film and a second insulating film are further included. The first insulating film is disposed on the outer peripheral surface, and the second insulating film is disposed on the inner surface. With this arrangement, the insulating seal 6 seals against the first insulating film 3 and the second insulating film 4. All three insulating materials—the first insulating film 3, the second insulating film 4, and the insulating seal 6—are insulating materials. Since the material properties of the insulating seal are similar to those of the first insulating film 3 and the second insulating film 4, they are easier to bond and seal. This results in a more secure and airtight connection between the conductive element 1, the conductive sheath 2, and the insulating seal 6.

[0081] According to some embodiments of the present invention, the first insulating film 3 comprises an aminosilane film and / or a triazine thiol oxide film. The aminosilane film is a silane-based film formed by treating with an aminosilane solvent, and the triazine thiol oxide film is an oxide film formed by treating with a triazine thiol solution. The triazine thiol oxide film contains a functional group at the other end of the triazine thiol that can chemically react with the material of the insulating sealant (e.g., polypropylene and / or polyphenylene sulfide) to form a chemical bond. The aminosilane film can also chemically react with the material of the insulating sealant 6 to form a chemical bond. Thus, the insulating sealant 6 can be chemically bonded to the first insulating film 3 and the second insulating film 4, thereby promoting the sealing effect of the insulating sealant 6 between the conductive element 1 and the conductive sheath 2. The chemical bonding, combined with the physical synergy described above, makes the bond between the insulating sealant 6 and the conductive element 1 and the conductive sheath 2 stronger. Here, the first insulating film 3 also includes other films that can chemically react with the insulating sealant 6 to promote the sealing effect.

[0082] According to other embodiments of the present invention, the second insulating film 4 comprises an aminosilane film and / or an oxide film of triazine thiol. The second insulating film 4 also includes other films that can chemically react with the insulating sealant 6 to promote a sealing effect.

[0083] According to some alternative embodiments of the present invention, such as Figure 1 As shown, a manufacturing process for an electrode assembly 100 for a battery 200 is provided, including the following steps: First, the outer peripheral surface of the conductive element 1 and the inner surface of the conductive sleeve 2 are surface treated; then, the treated conductive element 1 and conductive sleeve 2 are assembled into a positioning fixture, and an insulating sealant 6 is injected between the conductive element 1 and the conductive sleeve 2, so that the conductive element 1 and the conductive sleeve 2 form a sealing and insulating effect. The conductive element 1 and the conductive sleeve 2 are connected by the insulating sealant 6 to form an integral unit, thus completing the assembly. The injection method can be nano-injection molding, but is not limited to this. The surface treatment is not limited to T-treatment, E-treatment, etc. Further, the T-treatment process includes: water washing → alkaline washing → water washing → acid washing → water washing → 8 T-treatments → water washing → drying. The E-treatment process includes: water washing → alkaline washing → water washing → acid washing → water washing → pre-oxidation → water washing → 4 E-treatments → water washing → drying.

[0084] According to some embodiments of the present invention, at least a portion of the insulating sealant 6 is nano-injection molded between the conductive element 1 and the conductive sleeve 2. This arrangement achieves a strong bond between the conductive element 1 and the conductive sleeve 2, as well as a sealing and insulating effect, eliminating the need for a separate sealant and simplifying the structure of the electrode assembly 100. Specifically, the outer surface of the conductive element 1 and the inner circumferential surface of the conductive sleeve 2 are non-flat and have multiple nanopores. A first insulating film 3 and a second insulating film 4 are formed on the outer surface of the conductive element 1, the inner circumferential surface of the conductive sleeve 2, and the surface of the nanopores. The insulating sealant 6 is then injection molded into the gap between the conductive element 1 and the conductive sleeve 2. On one hand, the insulating sealant 6 forms a physical bond by filling the nanopores on the outer surface of the conductive element 1 and the inner circumferential surface of the conductive sleeve 2 through injection molding; on the other hand, the insulating sealant 6 chemically bonds with the first insulating film 3 and the second insulating film 4, resulting in a stronger bond. Furthermore, the physical and chemical bonding processes in the nano-injection molding process of this invention can be simply described as follows: In the specific embodiment of this invention, the outer and inner circumferential surfaces of the nano-injection molding process are surface-treated to have a nanoporous structure. When the outer and inner circumferential surfaces are respectively immersed in a solution of aminosilane (or triazine thiol solution), the hydroxyl groups formed by the hydrolysis of silane molecules condense with the hydroxyl groups on the metal surface, forming a strong chemical adsorption film on the inner and outer surfaces of the nanopores, and moderately cross-linking them to obtain a first insulating film 3 and a second insulating film 4. Specifically, the formation process and mechanism of the first insulating film 3 and the second insulating film 4 (taking an aminosilane film as an example) are as follows: Silane contains two different chemical functional groups. One end can react with the hydroxyl groups on the surface of inorganic materials (such as metals and their oxides, glass fibers, silicates) to form covalent bonds; the other end can form covalent bonds with resin, thereby combining two materials with very different properties, which plays a role in improving the performance of composite materials. Silanization can be described as a four-step reaction model: (1) the three Si-OR groups connected to silicon hydrolyze into Si-OH; (2) Si-OH groups undergo dehydration condensation to form oligomeric siloxanes containing Si-OH; (3) the Si-OH in the oligomer forms hydrogen bonds with the OH on the surface of the inorganic material; (4) during the heating and curing process, a dehydration reaction occurs, and covalent bonds are formed with the inorganic material. However, at the interface, only one silanol group of the silane bonds with the substrate surface, and the remaining two Si-OH groups either condense with the Si-OH in other silanes or remain in a free state. Furthermore, the nano-injection molding process of the conductive component 1 and the conductive sheath 2 with the first insulating film 3 and the second insulating film 4 is as follows: the conductive component 1 and the conductive sheath 2 are embedded into the injection mold, and the insulating sealant 6 (polar resins carrying Lewis acid groups such as PPS (polyphenylene sulfide)) is injected. An exothermic reaction occurs between the amine groups of the silane and the polar groups of the resin, and they become amino acids and alcohols.Because the above reaction generates heat, the curing of the insulating film on the metal surface and the plastic part obtained from the reaction of the insulating sealant 6 is delayed. The resin on the interface can be injected into the ultra-fine depressions and then cured. The insulating sealant 6 is firmly anchored to the conductive part 1 and the conductive sheath 2. Moreover, the metal part and the resin polymer have a coupling effect through silane, which further increases the bonding strength between the metal and the plastic part.

[0085] According to an embodiment of a second aspect of the present invention, a battery 200 is provided. The battery 200 includes an electrode assembly 100, a cover plate, and an electrical lead-out member according to an embodiment of a first aspect of the present invention. The cover plate 9 has a first through-hole, a portion of a conductive sheath 2 passes through the first through-hole and is connected to the cover plate 9, and the electrical lead-out member includes an inner lead-out piece 10, on which a second through-hole is formed, a portion of a conductive element 1 passes through the second through-hole and is connected to the inner lead-out piece 9.

[0086] According to a specific embodiment of the present invention, in the battery 200, the cover plate 9 is connected to the conductive sheath 2, the electrical lead-out component is connected to the conductive component 1, and the insulating seal 6 insulates and isolates the electrical sheath 2 and the conductive component 1. Furthermore, the insulating seal 6 insulates and isolates the electrical lead-out component and the cover plate 9. Thus, the assembly and sealing of the battery 200 are achieved through the terminal assembly 100 for the battery 200, resulting in a simple assembly procedure and convenient operation.

[0087] According to some embodiments of the present invention, the conductive element 1 can also be connected to the tabs of the battery 200. For example, the sheet-shaped conductive element 1 is more suitable for connecting the tabs to complete the assembly of the battery 200.

[0088] According to an embodiment of a third aspect of the present invention, the present invention provides a battery pack comprising: a battery 200 according to an embodiment of a second aspect of the present invention.

[0089] According to the battery pack of the present invention, the battery 200 is simple to assemble, suitable for mass production, and has a low cost.

[0090] According to an embodiment of a fourth aspect of the present invention, the present invention provides an electrical device comprising: a battery 200 according to an embodiment of a second aspect of the present invention, or a battery pack according to an embodiment of a third aspect of the present invention.

[0091] According to embodiments of the present invention, the assembly of the battery 200 or battery pack in the electrical equipment is simple, suitable for mass production, and has low cost. This facilitates the application of the electrical equipment.

[0092] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0093] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A pole assembly, characterized in that, include: A conductive element, said conductive element being adapted to be connected to an electrical lead-out element; A conductive sleeve is adapted to be connected to a cover plate. The conductive sleeve surrounds the outer peripheral surface of the conductive element and is spaced apart from the conductive element. The conductive sleeve has an inner surface. Both the outer peripheral surface and the inner surface are rough surfaces. The inner surface is disposed opposite to the outer peripheral surface. and An insulating seal, at least a portion of which is injection molded between the conductive element and the conductive sheath, the insulating seal abutting against the outer peripheral surface and the inner surface, respectively.

2. The pole assembly according to claim 1, characterized in that, The outer peripheral surface has an uneven structure, and multiple first nanopores are formed on the outer peripheral surface; and / or The inner surface has an uneven structure, and multiple second nanopores are formed on the inner surface.

3. The pole assembly according to claim 2, characterized in that, The diameter of the first nanopore is d1, wherein d1 satisfies: 20nm ≤ d1 ≤ 1000nm; and / or The diameter of the second nanopore is d2, wherein d2 satisfies: 20nm≤d2≤1000nm.

4. The pole assembly according to claim 1, characterized in that, The conductive component and the conductive sheath are integrally formed.

5. The pole assembly according to claim 1, characterized in that, Along the length of the conductive component, the conductive sheath is disposed at the middle portion of the conductive component.

6. The electrode assembly according to claim 5, characterized in that, In the longitudinal direction of the conductive component, the length of the conductive sheath is H1, wherein H1 satisfies: H1≥1mm.

7. The pole assembly according to claim 1, characterized in that, Along the length of the conductive element, the two ends of the conductive sheath do not protrude beyond the two ends of the insulating seal.

8. The pole assembly according to claim 1, characterized in that, Along the direction away from the conductive element, the thickness of the conductive sheath is greater than or equal to the thickness of the insulating seal.

9. The pole assembly according to claim 8, characterized in that, The thickness W1 of the conductive sheath, wherein W1 satisfies: 0.15mm ≤ W1 ≤ 2mm; and / or The thickness of the insulating seal is W2, wherein W2 satisfies: 0.15mm≤W2≤1mm.

10. The pole assembly according to claim 1, characterized in that, The conductive sheath includes: Sheath body; and A sheath step portion is formed on the outer peripheral surface of one end of the sheath body portion and extends in a direction away from the outer peripheral surface of the one end of the sheath body portion.

11. The pole assembly according to any one of claims 1-10, characterized in that, The conductive element includes: Conductive body part; and A conductive step portion is formed on the outer peripheral surface of one end of the conductive body portion and extends in a direction away from the outer peripheral surface of the one end of the conductive body portion.

12. The pole assembly according to claim 11, characterized in that, The insulating seal includes: An insulating body portion, wherein the extending direction of the insulating body portion is the same as the extending direction of the conductive body portion; A first insulating step portion, one end of which is connected to one end of the insulating body portion, and the other end of which extends in a direction away from the conductive element; and / or The second insulating step portion has one end connected to the other end of the insulating body portion, and the other end of the second insulating step portion extends in a direction away from the conductive element. At least a portion of the second insulating step portion abuts against the conductive step portion.

13. The pole assembly according to claim 12, characterized in that, Along the direction away from the conductive body portion, the width L1 of the conductive step portion and the width L2 of the second insulating step portion, wherein L1 and L2 satisfy: L2 ≥ L1; and / or Along the direction away from the conductive body portion, the distance from the outer periphery of the conductive body portion to the surface of the conductive sheath on the side away from the conductive body portion is L3, the width of the first insulating step portion is L4, and the width of the insulating body portion is L5, wherein L3, L4, and L5 satisfy: L3 > L4 ≥ L5; and / or In the length direction of the conductive component, the length of the conductive sheath is H1, the minimum distance H2 between the end of the conductive sheath near the conductive step and the conductive step, and the height H3 of the insulating body, wherein H1, H2, and H3 satisfy: 1mm ≥ H2 ≥ 0.2mm, and H3 > H1 + H2.

14. The pole assembly according to any one of claims 1-13, characterized in that, A groove is formed by recessing a portion of the outer peripheral surface of the conductive element toward the interior of the conductive element; A protrusion is formed from a portion of the inner surface of the insulating seal toward the conductive element, the protrusion being located within the groove.

15. The pole assembly according to claim 1, characterized in that, The conductive element is in the form of a sheet, prism, cylinder, racetrack-shaped column, or elliptical column; and / or The cross-section of the conductive sheath is a prismatic ring, a circular ring, a racetrack-shaped ring, or an elliptical ring.

16. The pole assembly according to claim 1, characterized in that, The conductive component is at least one of aluminum, copper, nickel, iron, ferroalloy, aluminum alloy, steel-copper, and copper-nickel components; and / or The conductive sheath is at least one of the following: aluminum, copper, nickel, iron, ferroalloy, aluminum alloy, steel-copper, and copper-nickel components; and / or The insulating seal is made of polypropylene and / or polyphenylene sulfide.

17. The pole assembly according to any one of claims 1-16, characterized in that, Also includes: A first insulating film is disposed on the outer peripheral surface; and A second insulating film is disposed on the inner surface.

18. The pole assembly according to claim 17, characterized in that, The first insulating film comprises an aminosilane film and / or a triazine thiol oxide film; and / or The second insulating film comprises an aminosilane film and / or an oxide film of triazine thiol.

19. A battery, characterized in that, include: The pole assembly according to any one of claims 1-18; A cover plate having a first through hole, a portion of the conductive sheath passing through the first through hole and connected to the cover plate; and An electrical lead-out component, the electrical lead-out component including an inner lead-out piece, the inner lead-out piece having a second through hole formed thereon, a portion of the conductive component passing through the second through hole and connected to the inner lead-out piece.

20. A battery pack, characterized in that, include: Multiple batteries according to claim 19.

21. An electrical appliance, characterized in that, include: The battery according to claim 19, or the battery pack according to claim 20; The battery and the battery pack are used to provide power to the electrical appliance.

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