WO2024045458A1 - 顶盖组件、电池及用电设备 - Google Patents

顶盖组件、电池及用电设备 Download PDF

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Publication number
WO2024045458A1
WO2024045458A1 PCT/CN2022/143989 CN2022143989W WO2024045458A1 WO 2024045458 A1 WO2024045458 A1 WO 2024045458A1 CN 2022143989 W CN2022143989 W CN 2022143989W WO 2024045458 A1 WO2024045458 A1 WO 2024045458A1
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WO
WIPO (PCT)
Prior art keywords
riveting
hole
top cover
pole
cover assembly
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2022/143989
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English (en)
French (fr)
Inventor
徐卫东
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Xiamen Hithium Energy Storage Technology Co Ltd
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Xiamen Hithium Energy Storage Technology Co Ltd
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Filing date
Publication date
Application filed by Xiamen Hithium Energy Storage Technology Co Ltd filed Critical Xiamen Hithium Energy Storage Technology Co Ltd
Publication of WO2024045458A1 publication Critical patent/WO2024045458A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/147—Lids or covers
    • H01M50/148—Lids or covers characterised by their shape
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/183—Sealing members
    • H01M50/184—Sealing members characterised by their shape or structure
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/30—Arrangements for facilitating escape of gases
    • H01M50/317—Re-sealable arrangements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/543—Terminals
    • H01M50/547—Terminals characterised by the disposition of the terminals on the cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/543—Terminals
    • H01M50/552—Terminals characterised by their shape
    • H01M50/553—Terminals adapted for prismatic, pouch or rectangular cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/543—Terminals
    • H01M50/564—Terminals characterised by their manufacturing process
    • H01M50/567—Terminals characterised by their manufacturing process by fixing means, e.g. screws, rivets or bolts
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • the present application relates to the field of battery technology, and in particular, to a top cover assembly, a battery and electrical equipment.
  • the stability and reliability of this riveting method are relatively poor, and the stability of the pole posts and riveted blocks after riveting cannot be guaranteed. property, the strength of the pole and the riveting block after riveting is relatively low, resulting in an unstable connection between the pole and the riveting block. This will not only make the contact area between the pole and the riveting block too small, but also increase the size of the pole.
  • the internal resistance of the contact with the riveting block leads to poor flow capacity between the pole and the riveting block; it also affects the torsion resistance of the pole.
  • the embodiment of the present application discloses a top cover assembly, battery and electrical equipment, which can not only reduce the internal contact resistance between the pole and the pressing block, reduce the loss, but also improve the torsion resistance of the pole to ensure that the pressing block and the sealing between poles.
  • a top cover assembly which includes:
  • a riveting block the riveting block is provided with a riveting hole throughout, the riveting hole includes a first riveting hole section and a second riveting hole section that communicate with each other, the first riveting hole section is used to cooperate with the pole, The second riveting hole section is used to match the stamped end of the riveted pole;
  • the thickness of the riveting block is h1
  • the hole depth of the second riveting hole section is h2, h1/2-0.5 ⁇ h2 ⁇ h1/2+0.5.
  • the riveting hole of the riveting block of the top cover assembly includes a first riveting hole section and a second riveting hole section.
  • the second riveting hole section is used to connect with the stamped end of the riveted pole.
  • the outer diameter matches.
  • the internal contact resistance after riveting with the riveting block can improve the flow capacity between the pole and the riveting block; it can also improve the torsion resistance of the pole to avoid torsional fatigue and sealing between the pole and the riveting block. If the situation is bad, improve the sealing performance of the top cover assembly.
  • the end surface of the stamping end is provided with a positioning hole, and the positioning hole is used to fit and connect with the protrusion of the rivet pin.
  • the positioning of the riveting pin is facilitated, and the gap between the pole and the riveting block can be effectively reduced, so that the stamped end of the pole is fully integrated with the riveting block, thereby effectively enhancing the riveting.
  • Strength between block and pole it can be known that when the pole is riveted, the pole can be inserted into the first riveting hole section in advance, and the punched end of the pole is located in the second riveting hole section, and then the riveting pin can be used to rivet the pole. , causing the material at the stamped end of the pole to expand outward due to the extrusion force of the riveting needle, and then tighten with the second riveting hole section.
  • the lower bottom surface of the riveting needle is provided with a protrusion, and the end surface of the stamped end is provided with a positioning hole.
  • the above structural design will effectively increase the amount of expansion of the material at the stamped end of the pole after being affected by the extrusion force of the rivet pin, thereby making the stamped end of the pole contact the second riveting hole.
  • the combination is more stable and reliable. .
  • the depth of the positioning hole is h3, h2-0.5 ⁇ h3 ⁇ h2+0.5.
  • the force of the riveting needle acting on the stamping end will not be too large or too small, thereby ensuring that there is a certain size between the pole and the riveting block.
  • a relatively appropriate riveting force can ensure the stability of the pole and the riveting block after riveting. This can not only ensure a large contact area between the pole and the riveting block, increase the flow area, and reduce the risk of riveting between the pole and the riveting block.
  • the final contact internal resistance can improve the overcurrent capacity between the pole and the riveting block; it can also improve the torsion resistance of the pole to avoid torsional fatigue between the pole and the riveting block and poor sealing. Improve the sealing performance of the top cover assembly.
  • the positioning hole is a tapered hole, and the cone angle of the positioning hole is ⁇ , 90° ⁇ 150°.
  • the cone angle ⁇ of the positioning hole satisfies: 90° ⁇ 150°, it can also ensure that the force of the riveting needle acting on the stamping end will not be too large or too small to ensure that there is a gap between the pole and the riveting block.
  • a relatively appropriate riveting force ensures the stability of the pole and the riveting block after riveting. This not only ensures a large contact area between the pole and the riveting block to increase the flow area and reduce the friction between the pole and the riveting block.
  • the internal contact resistance after riveting can improve the flow capacity between the pole and the riveting block; it can also improve the torsion resistance of the pole to avoid torsional fatigue between the pole and the riveting block and poor sealing. , improve the sealing performance of the top cover assembly.
  • the pole When the pole is riveted, the pole can be inserted into the first riveting hole section in advance, and the punched end of the pole is located in the second riveting hole section. Then, through the riveting pressure of the riveting needle, the pole can be defined by There is a first gap between the outer peripheral surface and the inner surface of the first riveting hole segment.
  • the radial size of the second riveting hole segment is larger than the radial size of the first riveting hole segment, it means that the outer peripheral surface of the stamping end before riveting is There is also a gap between the inner surface of the second riveting hole section and the pole, so that the pole can be inserted into the first riveting hole section, and the punched end of the pole can be inserted into the second riveting hole section, thereby facilitating the pole and riveting. Hole assembly.
  • the size of the first gap is d, 0.05mm ⁇ d ⁇ 0.10mm.
  • the size d of the first gap between the outer circumferential surface of the pole and the inner surface of the first riveting hole section to satisfy: 0.05 mm ⁇ d ⁇ 0.10 mm, it is possible to facilitate the assembly of the pole and the riveting hole while avoiding polarization.
  • the first gap between the outer circumferential surface of the column and the inner surface of the first riveting hole section is too large, thereby preventing the overall size of the top cover assembly from becoming larger in the direction perpendicular to the thickness direction of the riveting block, which is beneficial to the top cover assembly. miniaturized design.
  • the radial size of the second riveting hole segment is larger than the radial size of the first riveting hole segment to construct a step portion, and the step portion stops with the stamping end. Arrive.
  • the radial size of the second riveting hole segment is larger than the radial size of the first riveting hole segment, during riveting, the material at the stamped end of the pole expands outward due to the riveting pressure of the riveting needle, so that The stamping end and the step portion are in contact, thereby making the pole and the riveting block fixedly connected.
  • This design can improve the stability of the pole being installed in the riveting hole and increase the connection strength and reliability of the top cover assembly.
  • the top cover assembly further includes an upper plastic part, a top cover plate and a lower plastic part, and the riveting block, the upper plastic part, the top cover plate and the lower plastic part They are stacked in sequence, and the poles are inserted through the first riveting hole section, the upper plastic part, the top cover plate and the lower plastic part in sequence; one end of the poles is away from the stamping end.
  • a convex edge is provided, the convex edge extends along the circumferential direction of the pole and protrudes from the outer peripheral surface of the pole, and the convex edge is located on a side of the lower plastic part away from the top cover plate. side and stops against the lower plastic part.
  • the convex edge protruding from the outer circumferential surface of the pole can be used to improve the installation stability of the pole through the contact between the convex edge and the lower plastic part. At the same time, it is also convenient to form a sealing structure with other structures and improve the top cover assembly. of sealing.
  • the flange has a first surface facing the punching end
  • the third through hole has a first inner peripheral wall
  • the top cover plate has a surface facing the flange and protruding from the The second surface of the first inner peripheral wall, the first surface, the first inner peripheral wall and the second surface form a sealed cavity, and a sealing member is provided in the sealed cavity.
  • the setting of the seal can not only achieve a sealed connection between the top cover plate, pole, upper plastic parts and lower plastic plate, but also protect other structures when stamping the stamping end of the pole, avoid damage to other structures, and improve the top cover assembly. yield.
  • the second through hole has a second inner peripheral wall, a second gap is formed between the second inner peripheral wall and the outer peripheral surface of the pole, and the second gap is connected to the outer peripheral surface of the pole.
  • the sealing chamber is connected, and the sealing member includes a first part and a second part that are connected to each other. The first part is sealed in the sealing chamber, and the second part is sealed in the second gap.
  • the seal when the seal is assembled into the seal cavity, the inner wall of the seal cavity squeezes the seal. Under the action of the extrusion force, the seal deforms. Since the seal cavity is connected to the second gap, the seal faces the second gap. The gap deforms so that the seal forms first and second portions connected to each other, wherein the first portion of the seal is located in the seal cavity to seal against the seal cavity, and the second portion of the seal is located in the second gap to seal to the seal cavity.
  • the circumferential side of the riveting block is provided with a first chamfer.
  • the first chamfer can be used to eliminate the cutting stress during processing of the riveting block, thereby improving the structural strength of the riveting block; on the other hand, when assembling the battery with the top cover assembly to the fixed bracket of the battery module, The first chamfer can be used to guide the riveting block to penetrate into the limiting groove on the fixed bracket, thereby playing a guiding role and achieving better positioning and limiting effects, thereby ensuring that the top cover assembly
  • the explosion-proof valve on the explosion-proof valve corresponds to the escape groove on the fixed bracket to ensure that the explosion-proof valve can escape the air and exhaust air in time when thermal runaway occurs to achieve the explosion-proof effect and avoid potential safety hazards.
  • the top cover assembly further includes an upper plastic part, the riveting block and the upper plastic part are arranged sequentially along the thickness direction of the riveting block, and the poles are inserted through the riveting blocks in sequence.
  • the first riveting hole section and the upper plastic part have a second chamfer on the outer circumferential surface corresponding to the first chamfer.
  • the second chamfer and the first chamfer can be used to jointly guide the riveting block and the upper plastic part to pass through the limiting position on the fixed bracket.
  • the groove it can play a better guiding role, and can have better positioning and limiting effects, so that the explosion-proof valve on the top cover assembly can more accurately correspond to the setting of the avoidance groove on the fixed bracket, so as to It ensures that the explosion-proof valve can achieve 100% air avoidance, and can exhaust air in time when thermal runaway occurs to achieve explosion-proof effect, so as to balance the internal and external air pressure of the battery, improve the safety of the battery, and avoid potential safety hazards.
  • a second aspect of the present application discloses a battery having a top cover assembly as disclosed in the first aspect.
  • the battery with the top cover assembly disclosed in the first aspect can not only reduce the internal contact resistance between the pole and the pressing block and reduce the loss, but also improve the torsion resistance of the pole to ensure the tightness between the pressing block and the pole. Tightness.
  • a third aspect of the present application discloses an electrical device, which has a battery as disclosed in the second aspect.
  • Electrical equipment with the battery disclosed in the second aspect can not only reduce the internal contact resistance between the pole and the pressing block, reduce losses, but also improve the torsion resistance of the pole to ensure the tightness between the pressing block and the pole. Tightness.
  • the riveting hole of the riveting block includes a first riveting hole section and a second riveting hole section.
  • the second riveting hole section is used to connect with the stamped end of the riveted pole.
  • the outer diameter matches.
  • the internal contact resistance after riveting with the riveting block can improve the flow capacity between the pole and the riveting block; it can also improve the torsion resistance of the pole to avoid torsional fatigue and sealing between the pole and the riveting block. If the problem is bad, improve the sealing of the top cover assembly.
  • Figure 1 is a schematic structural diagram of a top cover assembly disclosed in an embodiment of the present application.
  • Figure 2 is a top view of the top cover assembly disclosed in the embodiment of the present application.
  • Figure 3 is a cross-sectional view along the M-M direction of the top cover assembly disclosed in Figure 2;
  • Figure 4 is an exploded structural schematic view of the top cover assembly disclosed in Figure 3;
  • Figure 5 is a partial enlarged view of position A in Figure 3;
  • Figure 6 is a partial enlarged view of B in Figure 3;
  • FIG. 7 is a schematic structural diagram of the battery disclosed in the embodiment of the present application.
  • Figure 8 is a schematic diagram of the exploded structure of the battery disclosed in the embodiment of the present application.
  • Riveting block 121. Riveting hole; 1211. First riveting hole section; 1212. Second riveting hole section; 1213. Step portion; 122. First chamfer.
  • Top cover plate 141. Second through hole; 142. Second gap.
  • first means two or more.
  • the first aspect of this application discloses a top cover assembly, which can be applied to batteries.
  • the top cover assembly 1 includes a pole 11 and a riveting block 12.
  • the pole 11 has a stamped end 111
  • the riveting block 12 is provided with a riveting hole 121 throughout.
  • the riveting hole 121 includes a first riveting hole section 1211 and a second riveting hole section 1212 that communicate with each other.
  • the first riveting hole section 1211 is used to cooperate with the pole 11, and the second riveting hole section 1211 is used to cooperate with the pole 11.
  • the riveting hole section 1212 is used to match the stamped end 111 of the riveted pole 11.
  • the thickness of the riveting block 12 is h1
  • the hole depth of the second riveting hole section 1212 is h2, h1/2-0.5 ⁇ h2 ⁇ h1/2+0.5.
  • the hole depth h2 of the second riveting hole section 1212 and the thickness h1 of the riveting block 12 satisfy: h1/2-0.5 ⁇ h2 ⁇ h1/2+0.5
  • the second riveting hole section 1212 can have a deeper hole depth to improve the stability of the pole post 11 and the riveting block 12 after riveting, so that the pole post 11 and the riveting block 12
  • the combination between the riveting blocks 12 is firm and reliable, which not only ensures a large contact area between the pole post 11 and the riveting block 12 to increase the flow area and reduce the internal contact resistance after the pole post 11 and the riveting block 12 are riveted , thereby improving the flow capacity between the pole 11 and the riveting block 12; at the same time, it can also improve the torsion resistance of the pole 11 to avoid torsional fatigue between the pole 11 and the riveting block 12 and poor sealing. Improve the sealing performance of the top cover assembly 1.
  • the hole depth of the second riveting hole section 1212 is too shallow, resulting in too small a riveting force, which easily affects the tensile strength between the riveted pole post 11 and the riveting block 12, thereby easily Problems of deformation and leakage occur during use; and when h2>h1/2+0.5, the hole depth of the second riveting hole section 1212 is too deep. On the one hand, it is easy for the stamped end 111 of the pole 11 to be riveted.
  • the second riveting hole segment 1212 cannot be filled, resulting in a gap between the riveted pole post 11 and the riveting block 12, thereby affecting the tensile strength between the riveted pole post 11 and the riveting block 12, making it easier to use Problems of deformation and leakage may occur during the process, which will eventually lead to the battery being unable to continue to be used and causing great safety hazards to the battery. On the other hand, it may also easily lead to excessive riveting force, and the force acting on the riveting block 12 will become unstable. This will cause the riveting block 12 to deform, crack or even break, affecting the sealing performance of the top cover assembly 1 .
  • the radial size of the second riveting hole segment 1212 is larger than the radial size of the first riveting hole segment 1211 to construct a step portion 1213 , and the step portion 1213 stops against the stamped end 111 of the pole post 11 . Since the radial size of the second riveting hole section 1212 is larger than the radial size of the first riveting hole section 1211, during riveting, the material of the punched end 111 of the pole post 11 is affected by the riveting needle extrusion force. Expand outward to make the stamping end 111 and the step portion 1213 contact, thereby making the pole post 11 fixedly connected to the riveting block 12. This design can improve the stability of the pole post 11 installed in the riveting hole 121 and increase the top. Connection strength and reliability of cover assembly 1.
  • the stamping of the pole post 11 The end surface of the end 111 is provided with a positioning hole 1111, which is used to cooperate with the protrusion of the rivet pin.
  • the positioning hole 1111 to cooperate with the protrusion of the riveting needle, the positioning of the riveting needle is facilitated, and the gap between the pole 11 and the riveting block 12 can be effectively reduced, so that the stamped end 111 of the pole 11 is fully connected with the riveting block. 12 are combined to effectively enhance the strength between the riveting block 12 and the pole 11.
  • the pole 11 when the pole 11 is riveted, the pole 11 can be inserted into the first riveting hole section 1211 in advance, and the stamped end 111 of the pole 11 is located in the second riveting hole section 1212, and then Through the riveting pressure of the riveting needle, the material of the stamped end 111 of the pole post 11 expands outward due to the extrusion force of the riveting needle, and is then tightened with the second riveting hole section 1212. Since the lower bottom surface of the riveting needle is provided with a protrusion, And the end face of the stamping end 111 is provided with a positioning hole 1111.
  • the above structural design will effectively increase the material of the stamping end 111 of the pole 11 under the extrusion force of the rivet pin.
  • the amount of expansion thus makes the combination between the punched end 111 of the pole post 11 and the second riveting hole 121 more stable and reliable.
  • the size of the positioning hole 1111 determines the size of the protrusion, which also determines the size of the riveting needle, thereby determining the size of the riveting force, which in turn determines the stability of the pole post 11 and the riveting block 12 after riveting.
  • the hole depth of the positioning hole 1111 is h3, and the hole depth of the positioning hole 1111 can satisfy: h2-0.5 ⁇ h3 ⁇ h2+0.5, so that the riveting needle
  • the force acting on the stamping end 111 will not be too large or too small, thereby ensuring a relatively appropriate riveting force between the pole post 11 and the riveting block 12, thereby ensuring the stability of the pole post 11 and the riveting block 12 after they are riveted.
  • This not only ensures a large contact area between the pole post 11 and the riveting block 12 to increase the flow area, but also reduces the contact internal resistance between the pole post 11 and the riveting block 12 after they are riveted, thereby improving the connection between the pole post 11 and the riveting block 12.
  • the overflow capacity between the blocks 12 at the same time, it can also improve the torsion resistance of the pole post 11 to avoid torsional fatigue between the pole post 11 and the riveting block 12 and cause poor sealing, and improve the sealing performance of the top cover assembly 1 .
  • first gap 113 between the outer peripheral surface of the pole 11 and the inner surface of the first riveting hole section 1211 .
  • the pole 11 when the pole 11 is riveted, the pole 11 can be inserted into the first riveting hole section 1211 in advance, and the stamped end 111 of the pole 11 is located in the second riveting hole section 1212, and then riveted
  • the needle is riveted by defining a first gap 113 between the outer circumferential surface of the pole post 11 and the inner surface of the first riveting hole section 1211.
  • the radial size of the second riveting hole section 1212 is larger than the first riveting hole section 1211.
  • the size d of the first gap 113 between the outer circumferential surface of the pole post 11 and the inner surface of the first riveting hole section 1211 to satisfy: 0.05mm ⁇ d ⁇ 0.10mm, the assembly of the pole post 11 and the riveting hole 121 can be facilitated.
  • the first gap 113 between the outer circumferential surface of the pole post 11 and the inner surface of the first riveting hole section 1211 is prevented from being too large, thereby preventing the top cover assembly 1 from being damaged as a whole in the direction perpendicular to the thickness direction of the riveting block 12
  • the size becomes larger, which is beneficial to the miniaturization design of the top cover assembly 1 .
  • the outer peripheral surface of the riveting block 12 has a first chamfer 122 .
  • the first chamfer 122 can be used to eliminate the cutting stress during processing of the riveting block 12, thereby improving the structural strength of the riveting block 12; on the other hand, when assembling the battery with the top cover assembly 1 to the battery module, When the bracket is fixed, the first chamfer 122 can be used to guide the riveting block 12 to penetrate into the limiting groove on the fixed bracket, thereby playing a guiding role and achieving better positioning and limiting effects.
  • the explosion-proof valve on the top cover assembly 1 corresponds to the avoidance groove on the fixed bracket, so as to ensure that the explosion-proof valve can avoid the air, and can exhaust air in time when thermal runaway occurs to achieve the explosion-proof effect, so that the inside and outside of the battery can be protected.
  • the air pressure balance improves the safety of battery use and avoids potential safety hazards.
  • the top cover assembly 1 also includes an upper plastic part 13 , a top cover plate 14 and a lower plastic part 15 , a riveting block 12 , an upper plastic part 13 , and a top cover plate. 14 and lower plastic parts 15 are stacked and arranged in sequence along the thickness direction of the riveting block 12.
  • the riveting block 12, the upper plastic part 13, the top cover plate 14 and the lower plastic part 15 are arranged along the thickness direction of the riveting block 12 in Figures 3 and 4.
  • the poles 11 are arranged sequentially in the up and down direction, and the poles 11 are sequentially penetrated through the first riveting hole section 1211, the upper plastic part 13, the top cover 14 and the lower plastic part 15.
  • the upper plastic part 13 is provided with a first through hole. 131.
  • the top cover plate 14 is provided with a second through hole 141
  • the lower plastic part 15 is provided with a third through hole 151, the first riveting hole section 1211, the first through hole 131, the second through hole 141 and the third through hole 151.
  • the pole posts 11 are penetrated through the first riveting hole section 1211 , the first through hole 131 , the second through hole 141 and the third through hole 151 in sequence.
  • the end of the pole 11 away from the stamped end 111 is provided with a flange 112 .
  • the flange 112 extends along the circumferential direction of the pole 11 and protrudes from the outer peripheral surface of the pole 11 .
  • the flange 112 is located on the lower plastic part 15 The side away from the top cover 14 and stops against the lower plastic part 15 .
  • the flange 112 protruding from the outer circumferential surface of the pole 11 can improve the installation stability of the pole 11 by utilizing the contact between the flange 112 and the lower plastic part 15 . It also facilitates the formation of a sealing structure with other structures. , improve the sealing performance of the top cover assembly 1.
  • the surface of the flange 112 facing the punching end 111 , the inner peripheral wall of the third through hole 151 , and the surface of the top cover plate 14 facing the flange 112 and protruding from the inner peripheral wall of the third through hole 151 define a The sealing cavity 152 , that is, the flange 112 has a first surface facing the punching end 111 , the third through hole 151 has a first inner peripheral wall, and the top cover plate 14 has a first surface facing the flange 112 and protruding from the first inner peripheral wall.
  • the second surface forms a sealing cavity 152 between the first surface, the first inner peripheral wall and the second surface, and the sealing member 16 is disposed in the sealing cavity 152 .
  • the arrangement of the seal 16 not only enables the top cover plate 14, the pole 11, the upper plastic part 13 and the lower plastic plate to achieve a sealed connection, but also protects other structures when stamping the stamping end 111 of the pole 11 to avoid damage to other structures. Damage, improve the yield of the top cover assembly 1.
  • the sealing member 16 can be a silicone ring, a rubber ring, a plastic ring or a foam ring.
  • the sealing cavity 152 has an opening close to the second gap 142 , and the sealing cavity 152 passes through This opening communicates with the second gap 142 . In this way, when the sealing member 16 is assembled into the sealing cavity 152, the inner wall of the sealing cavity 152 squeezes the sealing member 16. Under the action of the extrusion force, the sealing member 16 deforms.
  • the sealing member 16 Since the sealing cavity 152 and the second gap 142 Communicated, the sealing member 16 is deformed toward the second gap 142 so that the sealing member 16 forms a first portion 161 and a second portion 162 connected to each other, wherein the first portion 161 of the sealing member 16 is located in the sealing cavity 152 to seal with the sealing cavity. 152, and the second part 162 of the sealing member 16 is located in the second gap 142 to seal the second gap 142.
  • the sealing member 16 can block the opening connecting the sealing cavity 152 and the second gap 142, thereby improving the The sealing effect of the seal 16; at the same time, because part of the seal 16 (ie, the second part 162 of the seal 16) is located in the second gap 142 and seals the second gap 142, this means that the second part 162 of the seal 16 will also Being constrained by the second gap 142 , the installation stability of the seal 16 in the seal cavity 152 can be improved.
  • the outer peripheral surface of the upper plastic part 13 is provided with a second chamfer 132 at a position corresponding to the first chamfer 122 .
  • the second chamfer 132 and the first chamfer 122 can be used to jointly guide the riveting block 12 and the upper plastic part 13 to pass through the fixed bracket.
  • the limit groove on the bracket can play a better guiding role, and can have better positioning and limiting effects, so that the explosion-proof valve on the top cover assembly 1 can more accurately correspond to the position on the fixed bracket.
  • the avoidance groove is set up to ensure that the explosion-proof valve can achieve 100% air avoidance, and can exhaust air in time when thermal runaway occurs to achieve the explosion-proof effect, so as to balance the internal and external air pressure of the battery, improve the use safety of the battery, and avoid causing damage to the battery. to safety hazards.
  • Figure 7 is a schematic structural diagram of the battery disclosed in the second aspect of the embodiment of the present application.
  • Figure 8 is a structural exploded schematic diagram of the battery disclosed in the second aspect of the embodiment of the present application.
  • the present application also discloses a Battery, the battery 2 has the top cover assembly 1 as described in the above embodiment.
  • the battery 2 may be a secondary battery.
  • the battery 2 may further include a housing 21 and a battery core 22.
  • the housing 21 has a receiving cavity 211, and the receiving cavity 211 is formed as the interior of the battery 2 as described above.
  • the accommodating cavity 211 has an opening 212 connected to the external space.
  • the top cover assembly 1 is fixedly connected to the housing 21 and closes the opening 212.
  • the battery core 22 is disposed in the accommodating cavity 211. It can be understood that the battery with the top cover assembly 1 described in the above embodiment also has all the technical effects of the above top cover assembly 1. That is, the battery can improve the stability of the pole and the riveting block after they are riveted, so that the combination between the pole and the riveting block is strong and reliable, which not only ensures a large contact area between the pole and the riveting block, but also ensures a large contact area between the pole and the riveting block. In order to reduce the internal contact resistance between the pole and the riveting block after riveting, thereby improving the flow capacity between the pole and the riveting block; it can also improve the torsion resistance of the pole to avoid torsion between the pole and the riveting block. If fatigue causes poor sealing, the sealing performance of the top cover assembly 1 should be improved. Since the above technical effects have been described in detail in the embodiment of the top cover assembly 1, they will not be described again here.
  • This application also discloses an electrical device, which has a battery as described in the above embodiment.
  • This electrical equipment can be used in automobiles, industrial equipment (such as machine tools) or household equipment (such as air conditioners, televisions, etc.) as the operating power supply for automobiles, industrial equipment or household equipment, etc. power requirements during start-up and operation.
  • the battery has the above-mentioned top cover assembly for the electrical equipment having the battery described in the above embodiment
  • the electrical equipment also has all the technical effects of the above-mentioned top cover assembly. That is, the electrical equipment can improve the stability of the pole and the riveting block after they are riveted, so that the combination between the pole and the riveting block is firm and reliable, which not only ensures greater contact between the pole and the riveting block.
  • top cover assembly, battery and electrical equipment disclosed in the embodiments of the present application have been introduced in detail above. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the present application.

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Abstract

本申请公开了一种顶盖组件、电池及用电设备，该顶盖组件包括极柱以及铆接块，极柱具有冲压端，铆接块贯穿设置有铆接孔，铆接孔包括相互连通的第一铆接孔段和第二铆接孔段，第一铆接孔段用于和极柱相配合，第二铆接孔段用于与铆压后的极柱的冲压端的外径相配合，在铆接块的厚度方向上，铆接块的厚度为h1，第二铆接孔段的孔深为h2，h1/2-0.5≤h2≤h1/2+0.5。本申请公开的顶盖组件、电池及用电设备，不仅能够降低极柱与压块之间的接触内阻，减少损耗，还可以提高极柱的抗扭能力，以确保压块和极柱之间的密封性。

Description

顶盖组件、电池及用电设备
本申请要求于2022年8月29日提交中国专利局、申请号为2022222829799、公开名称为顶盖组件、电池及用电设备的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及电池技术领域，尤其涉及一种顶盖组件、电池及用电设备。
背景技术
由于相关技术中的电池的极柱和铆接块通常采用挤压的铆接方式实现固定连接，使得这种铆接方式的稳定性和可靠性相对都比较差，无法保证极柱和铆接块铆接后的稳定性，使得极柱和铆接块铆接后的强度比较低，从而导致极柱和铆接块之间的结合不牢固，这样不仅会使得极柱和铆接块之间的接触面积过小，增大极柱与铆接块的接触内阻，从而导致极柱与铆接块之间的过流能力较差；而且还会影响极柱的抗扭能力。
发明内容
本申请实施例公开了一种顶盖组件、电池及用电设备，不仅能够降低极柱与压块之间的接触内阻，减少损耗，还可以提高极柱的抗扭能力，以确保压块和极柱之间的密封性。
为了实现上述目的，本申请第一方面公开了一种顶盖组件，所述顶盖组件包括：
极柱，所述极柱具有冲压端；以及
铆接块，所述铆接块贯穿设置有铆接孔，所述铆接孔包括相互连通的第一铆接孔段和第二铆接孔段，所述第一铆接孔段用于和所述极柱相配合，所述第二铆接孔段用于与铆压后的极柱的冲压端相配合；
在所述铆接块的厚度方向上，所述铆接块的厚度为h1，所述第二铆接孔段的孔深为h2，h1/2-0.5≤h2≤h1/2+0.5。
在本申请提供的顶盖组件中，顶盖组件的铆接块的铆接孔包括第一铆接孔段和第二铆接孔段，该第二铆接孔段用于与铆压后的极柱的冲压端的外径相匹配，通过使第二铆接孔段的孔深与铆接块的厚度h1满足：h1/2-0.5≤h2≤h1/2+0.5，能够使第二铆接孔段具有较深的孔深，以提高极柱和铆接块铆接后的稳定性，以使极柱和铆接块之间的结合牢固可靠，这样不仅可以确保极柱和铆接块之间具有较大的接触面积，以降低极柱与铆接块铆接后的接触内阻，从而提高极柱与铆接块之间的过流能力；同时还可以提高极柱的抗扭转能力，以避免极柱和铆接块之间出现扭转疲劳而出现密封不良的情况，提升顶盖组件的密封性
一种可选地实施方式中，所述冲压端的端面设有定位孔，所述定位孔用于与铆针的凸起配合连接。
通过设置定位孔，以与铆针的凸起配合连接，便于铆针的定位，且能够有效缩小极柱与铆接块之间的缝隙，使得极柱冲压端充分与铆接块结合，进而有效增强铆接块与极柱之间的强度。而且可以知道的是，在极柱进行铆接作业时，可预先将极柱插入到第一铆接孔段内，并使极柱的冲压端位于第二铆接孔段内，然后通过铆针的铆压，使得极柱的冲压端的材料受铆针挤压力作用向外膨胀，进而与第二铆接孔段紧固，由于铆针的下底面设置有凸起，以及冲压端的端面设置有定位孔，因而在挤压过程中，相对于平头铆针而言，上述结构设计会有效增加极柱的冲压端的材料受铆针挤压力作用后的膨胀量，进而使得极柱的冲压端与第二铆接孔结合的更加稳定可靠。。
一种可选地实施方式中，在所述铆接块的厚度方向上，所述定位孔的孔深为h3，h2-0.5≤h3≤h2+0.5。
当定位孔的孔深h3满足：h2-0.5≤h3≤h2+0.5时，使得铆针作用于冲压端的作用力 不会过大也不会过小，从而确保极柱和铆接块之间具有大小比较适当的铆接力，进而确保极柱和铆接块铆接后的稳固性，这样不仅可以确保极柱和铆接块之间具有较大的接触面积，以增加过流面积，降低极柱与铆接块铆接后的接触内阻，从而提高极柱与铆接块之间的过流能力；同时还可以提高极柱的抗扭转能力，以避免极柱和铆接块之间出现扭转疲劳而出现密封不良的情况，提升顶盖组件的密封性。
一种可选地实施方式中，所述定位孔为锥形孔，所述定位孔的锥角为α，90°≤α≤150°。
当定位孔的锥角α满足：90°≤α≤150°时，同样也能使得铆针作用于冲压端的作用力不会过大也不会过小，以确保极柱和铆接块之间具有大小比较适当的铆接力，进而确保极柱和铆接块铆接后的稳固性，这样不仅可以确保极柱和铆接块之间具有较大的接触面积，以增加过流面积，降低极柱与铆接块铆接后的接触内阻，从而提高极柱与铆接块之间的过流能力；同时还可以提高极柱的抗扭转能力，以避免极柱和铆接块之间出现扭转疲劳而出现密封不良的情况，提升顶盖组件的密封性。
一种可选地实施方式中，所述极柱的外周面和所述第一铆接孔段的内表面之间具有第一间隙。
在极柱进行铆接作业时，可预先将极柱插入到第一铆接孔段内，并使极柱的冲压端位于第二铆接孔段内，然后通过铆针的铆压，通过限定极柱的外周面和第一铆接孔段的内表面之间具有第一间隙，同时由于第二铆接孔段的径向尺寸大于第一铆接孔段的径向尺寸，说明冲压端在铆压前的外周面和第二铆接孔段的内表面之间也是具有间隙的，便于极柱穿设于第一铆接孔段，以及方便极柱的冲压端穿设于第二铆接孔段，从而方便极柱和铆接孔的组装。
一种可选地实施方式中，在垂直于所述铆接块的厚度方向的方向上，所述第一间隙的尺寸为d，0.05mm≤d≤0.10mm。
通过控制极柱的外周面和第一铆接孔段的内表面之间的第一间隙的尺寸d满足：0.05mm≤d≤0.10mm，能够在方便极柱和铆接孔的组装的同时，避免极柱的外周面和第一铆接孔段的内表面之间的第一间隙过大，从而避免顶盖组件在垂直于铆接块的厚度方向的方向上的整体尺寸变大，进而有利于顶盖组件的小型化设计。
一种可选地实施方式中，所述第二铆接孔段的径向尺寸大于所述第一铆接孔段的径向尺寸，以构造出台阶部，所述台阶部与所述冲压端相止抵。
由于第二铆接孔段的径向尺寸大于第一铆接孔段的径向尺寸，铆接时，通过铆针的铆压，使得极柱的冲压端的材料受铆针挤压力作用向外膨胀，以使冲压端和台阶部抵接，进而使得极柱与铆接块固定连接，由此设计，可以提高极柱安装于铆接孔内的稳固性，增加顶盖组件的连接强度和可靠性。
一种可选地实施方式中，所述顶盖组件还包括上塑胶件、顶盖板和下塑胶件，所述铆接块、所述上塑胶件、所述顶盖板和所述下塑胶件依次叠放设置，所述极柱依次穿设于所述第一铆接孔段、所述上塑胶件、所述顶盖板和所述下塑胶件；所述极柱的背离所述冲压端的一端设有凸边，所述凸边沿所述极柱的周向方向延伸并凸出于所述极柱的外周面，且所述凸边位于所述下塑胶件的背离所述顶盖板的一侧且与所述下塑胶件相止抵。
如此设置的凸出于极柱的外周面的凸边，可以利用该凸边和下塑胶件的抵接作用提高极柱的安装稳固性；同时还便于与其他结构形成密封结构，提高顶盖组件的密封性。
一种可选地实施方式中，所述凸边具有朝向所述冲压端的第一表面，所述第三贯通孔具有第一内周壁，所述顶盖板具有朝向所述凸边且凸出于所述第一内周壁的第二表面，所 述第一表面、所述第一内周壁和所述第二表面之间形成密封腔，所述密封腔内设有密封件。
密封件的设置，不但能够使顶盖板、极柱、上塑胶件及下塑胶板实现密封连接，还能够在冲压极柱的冲压端时保护其他结构，避免其他结构的损坏，提升顶盖组件的成品率。
一种可选地实施方式中，所述第二贯通孔具有第二内周壁，所述第二内周壁和所述极柱的外周面之间具有第二间隙，所述第二间隙与所述密封腔连通，所述密封件包括相互连接第一部分和第二部分，所述第一部分密封设置于所述密封腔中，所述第二部分密封设置于所述第二间隙中。
这样，当密封件装配至密封腔内时，密封腔的内壁对密封件进行挤压，在挤压力的作用下，密封件发生形变，由于密封腔与第二间隙连通，密封件朝向第二间隙形变，以使密封件形成相互连接的第一部分和第二部分，其中，密封件的第一部分位于密封腔中，以密封于密封腔，而密封件的第二部分位于第二间隙中，以密封于第二间隙，由此可以提升密封件的密封效果；同时由于密封件有部分(即密封件的第二部分)位于第二间隙中并密封第二间隙，这说明密封件的第二部分还会受到第二间隙的束缚，由此可以提高密封件在密封腔中的安装稳定性。
一种可选地实施方式中，所述铆接块的周侧面设有第一倒角。一方面，可以利用第一倒角消除铆接块加工时的切削应力，从而可以提升铆接块的结构强度；另一方面，在将具有该顶盖组件的电池装配至电池模组的固定支架时，可以利用该第一倒角引导铆接块穿设于固定支架上的限位槽内，从而可以起到导引的作用，并可以起到较好的定位以及限位效果，进而可以保证顶盖组件上的防爆阀对应于固定支架上的避空槽设置，以保证防爆阀可以实现避空，在热失控时能及时排气，实现防爆效果，避免带来安全隐患。
一种可选地实施方式中，所述顶盖组件还包括上塑胶件，所述铆接块和所述上塑胶件沿所述铆接块的厚度方向依次排列，所述极柱依次穿设于所述第一铆接孔段和所述上塑胶件，所述上塑胶件的外周面对应所述第一倒角的位置设有第二倒角。
这样，在将具有该顶盖组件的电池装配至电池模组的固定支架时，可以利用该第二倒角和第一倒角共同引导铆接块和上塑胶件穿设于固定支架上的限位槽内，可以起到更好的导引作用，并可以起到更好的定位以及限位效果，进而使得顶盖组件上的防爆阀可以更加精准地对应固定支架上的避空槽设置，以保证防爆阀可以实现百分百避空，在热失控时能及时排气，实现防爆效果，以使电池的内部和外部的气压平衡，提高电池的使用安全性，避免带来安全隐患。
本申请第二方面公开了一种电池，所述电池具有如第一方面公开的顶盖组件。具有第一方面公开的顶盖组件的电池，不仅能够降低极柱与压块之间的接触内阻，减少损耗，还可以提高极柱的抗扭能力，以确保压块和极柱之间的密封性。
本申请第三方面公开了一种用电设备，所述用电设备具有如第二方面公开的电池。具有第二方面公开的电池的用电设备，不仅能够降低极柱与压块之间的接触内阻，减少损耗，还可以提高极柱的抗扭能力，以确保压块和极柱之间的密封性。
与现有技术相比，本申请具有如下有益效果：
本申请提供的顶盖组件、电池及用电设备，铆接块的铆接孔包括第一铆接孔段和第二铆接孔段，该第二铆接孔段用于和铆压后的极柱的冲压端的外径相匹配，通过使第二铆接孔段的孔深与铆接块的厚度h1满足：h1/2-0.5≤h2≤h1/2+0.5，能够使第二铆接孔段具有较深的孔深，以提高极柱和铆接块铆接后的稳定性，以使极柱和铆接块之间的结合牢固可靠，这样不仅可以确保极柱和铆接块之间具有较大的接触面积，以降低极柱与铆接块铆接后的接触内阻，从而提高极柱与铆接块之间的过流能力；同时还可以提高极柱的抗扭转能 力，以避免极柱和铆接块之间出现扭转疲劳而出现密封不良的情况，提升顶盖组件的密封性。
附图说明
为了更清楚地说明本申请实施例中的技术方案，下面将对实施例中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本申请的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1是本申请实施例公开的顶盖组件的结构示意图；
图2是本申请实施例公开的顶盖组件的俯视图；
图3是图2中公开的顶盖组件沿M-M方向的剖视图；
图4是图3中公开的顶盖组件的分解结构示意图；
图5是图3中的A处的局部放大图；
图6是图3中的B处的局部放大图；
图7是本申请实施例公开的电池的结构示意图；
图8是本申请实施例公开的电池的分解结构示意图。
主要附图标记说明
1、顶盖组件；
11、极柱；111、冲压端；1111、定位孔；112、凸边；113、第一间隙。
12、铆接块；121、铆接孔；1211、第一铆接孔段；1212、第二铆接孔段；1213、台阶部；122、第一倒角。
13、上塑胶件；131、第一贯通孔；132、第二倒角。
14、顶盖板；141、第二贯通孔；142、第二间隙。
15、下塑胶件；151、第三贯通孔；152、密封腔。
16、密封件；161-第一部分；162-第二部分。
2、电池。
21、壳体；211、容纳腔；212、开口。
22、电芯。
具体实施方式
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅是本申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。
并且，上述部分术语除了可以用于表示方位或位置关系以外，还可能用于表示其他含义，例如术语“上”在某些情况下也可能用于表示某种依附关系或连接关系。对于本领域普通技术人员而言，可以根据具体情况理解这些术语在本申请中的具体含义。
此外，术语“第一”、“第二”等主要是用于区分不同的装置、元件或组成部分(具体的种类和构造可能相同也可能不同)，并非用于表明或暗示所指示装置、元件或组成部分的相对重要性和数量。除非另有说明，“多个”的含义为两个或两个以上。
下面将结合实施例和附图对本申请的技术方案作进一步的说明。
请一并参阅图1至图4，本申请第一方面公开了一种顶盖组件，其可以应用于电池，该顶盖组件1包括极柱11以及铆接块12，极柱11具有冲压端111，铆接块12贯穿设置有铆接孔121，铆接孔121包括相互连通的第一铆接孔段1211和第二铆接孔段1212，该第一铆接孔段1211用于和极柱11相配合，第二铆接孔段1212用于和铆压后的极柱11 的冲压端111相配合，在铆接块12的厚度方向上，例如在图3和4中的上下方向上，铆接块12的厚度为h1，第二铆接孔段1212的孔深为h2，h1/2-0.5≤h2≤h1/2+0.5。
需要说明的是，如果极柱11和铆接块12铆接后的强度不够，这说明极柱11和铆接块12之间的连接不稳定，使得极柱11和铆接块12容易分开，导致极柱11和铆接块12之间的接触面积变小，从而导致极柱11和铆接块12的接触内阻增大，所以通过使第二铆接孔段1212的孔深h2与铆接块12的厚度h1满足：h1/2-0.5≤h2≤h1/2+0.5，能够使第二铆接孔段1212具有较深的孔深，以提高极柱11和铆接块12铆接后的稳定性，以使极柱11和铆接块12之间的结合牢固可靠，这样不仅可以确保极柱11和铆接块12之间具有较大的接触面积，以增加过流面积，降低极柱11与铆接块12铆接后的接触内阻，从而提高极柱11与铆接块12之间的过流能力；同时还可以提高极柱11的抗扭转能力，以避免极柱11和铆接块12之间出现扭转疲劳而出现密封不良的情况，提升顶盖组件1的密封性。
而当h2＜h1/2-0.5时，第二铆接孔段1212的孔深过浅，导致铆接力过小，容易影响铆接后的极柱11与铆接块12之间的抗拉强度，进而容易在使用过程中发生变形和漏液的问题；而当h2＞h1/2+0.5时，第二铆接孔段1212的孔深过深，一方面，很容易出现极柱11的冲压端111铆压后无法填满第二铆接孔段1212，致使铆接后的极柱11与铆接块12之间出现缝隙，从而影响铆接后的极柱11与铆接块12之间的抗拉强度，进而容易在使用过程中发生变形和漏液的问题，最终导致电池无法继续使用，更会给电池造成很大的安全隐患；另一方面，也容易导致铆接力过大，则作用于铆接块12的作用力变大，从而导致铆接块12发生形变、裂开甚至断开，影响顶盖组件1的密封性。
进一步地，第二铆接孔段1212的径向尺寸大于第一铆接孔段1211的径向尺寸，以构造出台阶部1213，台阶部1213与极柱11的冲压端111相止抵。由于第二铆接孔段1212的径向尺寸大于第一铆接孔段1211的径向尺寸，铆接时，通过铆针的铆压，使得极柱11的冲压端111的材料受铆针挤压力作用向外膨胀，以使冲压端111和台阶部1213抵接，进而使得极柱11与铆接块12固定连接，由此设计，可以提高极柱11安装于铆接孔121内的稳固性，增加该顶盖组件1的连接强度和可靠性。
为了增加极柱11和铆接块12之间的铆接强度，通常会采用下底面设置有凸起的铆针，所以在一些实施例中，如图3和图4所示，该极柱11的冲压端111的端面设有定位孔1111，该定位孔1111用于与铆针的凸起配合连接。通过设置定位孔1111，以与铆针的凸起配合连接，便于铆针的定位，且能够有效缩小极柱11与铆接块12之间的缝隙，使得极柱11的冲压端111充分与铆接块12结合，进而有效增强铆接块12与极柱11之间的强度。而且可以知道的是，在极柱11进行铆接作业时，可预先将极柱11插入到第一铆接孔段1211内，并使极柱11的冲压端111位于第二铆接孔段1212内，然后通过铆针的铆压，使得极柱11的冲压端111的材料受铆针挤压力作用向外膨胀，进而与第二铆接孔段1212紧固，由于铆针的下底面设置有凸起，以及冲压端111的端面设置有定位孔1111，因而在挤压过程中，相对于平头铆针而言，上述结构设计会有效增加极柱11的冲压端111的材料受铆针挤压力作用后的膨胀量，进而使得极柱11的冲压端111与第二铆接孔121结合的更加稳定可靠。
需要说明的是，定位孔1111的大小，决定了凸起的大小，也就决定了铆针的大小，从而决定了铆接力的大小，进而决定了极柱11和铆接块12铆接后的稳定性，所以在一些实施例中，在铆接块12的厚度方向上，该定位孔1111的孔深为h3，且定位孔1111的孔深可满足：h2-0.5≤h3≤h2+0.5，使得铆针作用于冲压端111的作用力不会过大也不会过小，从而确保极柱11和铆接块12之间具有大小比较适当的铆接力，进而确保极柱11和 铆接块12铆接后的稳固性，这样不仅可以确保极柱11和铆接块12之间具有较大的接触面积，以增加过流面积，降低极柱11与铆接块12铆接后的接触内阻，从而提高极柱11与铆接块12之间的过流能力；同时还可以提高极柱11的抗扭转能力，以避免极柱11和铆接块12之间出现扭转疲劳而出现密封不良的情况，提升顶盖组件1的密封性。
进一步地，定位孔1111可为锥形孔，该定位孔1111的锥角为α，且定位孔1111的锥角α满足：90°≤α≤150°，例如α＝90°、95°、100°、105°、110°、115°、120°、125°、130°、135°、140°、145°或150°，等等。当定位孔1111的锥角α满足：90°≤α≤150°时，同样也能使得铆针作用于冲压端111的作用力不会过大也不会过小，以确保极柱11和铆接块12之间具有大小比较适当的铆接力，进而确保极柱11和铆接块12铆接后的稳固性，这样不仅可以确保极柱11和铆接块12之间具有较大的接触面积，以增加过流面积，降低极柱11与铆接块12铆接后的接触内阻，从而提高极柱11与铆接块12之间的过流能力；同时还可以提高极柱11的抗扭转能力，以避免极柱11和铆接块12之间出现扭转疲劳而出现密封不良的情况，提升顶盖组件1的密封性。
一些实施例中，结合图3至图5所示，该极柱11的外周面和第一铆接孔段1211的内表面之间具有第一间隙113。由前述可知，在极柱11进行铆接作业时，可预先将极柱11插入到第一铆接孔段1211内，并使极柱11的冲压端111位于第二铆接孔段1212内，然后通过铆针的铆压，通过限定极柱11的外周面和第一铆接孔段1211的内表面之间具有第一间隙113，同时由于第二铆接孔段1212的径向尺寸大于第一铆接孔段1211的径向尺寸，说明冲压端111在铆压前的外周面和第二铆接孔段1212的内表面之间也是具有间隙的，便于极柱11穿设于第一铆接孔段1211，以及方便极柱11的冲压端111穿设于第二铆接孔段1212，从而方便极柱11和铆接孔121的组装。
进一步地，在垂直于铆接块12的厚度方向的方向上，例如在图3和图4中的左右方向上，极柱11的外周面和第一铆接孔段1211的内表面之间的第一间隙113的尺寸为d，且该极柱11的外周面和第一铆接孔段1211的内表面之间的第一间隙113的尺寸d满足：0.05mm≤d≤0.10mm，例如d＝0.05mm、0.055mm、0.06mm、0.065mm、0.07mm、0.075mm、0.08mm、0.085mm、0.09mm、0.095mm或0.10mm，等等。通过控制极柱11的外周面和第一铆接孔段1211的内表面之间的第一间隙113的尺寸d满足：0.05mm≤d≤0.10mm，能够在方便极柱11和铆接孔121的组装的同时，避免极柱11的外周面和第一铆接孔段1211的内表面之间的第一间隙113过大，从而避免顶盖组件1在垂直于铆接块12的厚度方向的方向上的整体尺寸变大，进而有利于顶盖组件1的小型化设计。
一些实施例中，该铆接块12的外周面具有第一倒角122。一方面，可以利用第一倒角122消除铆接块12加工时的切削应力，从而可以提升铆接块12的结构强度；另一方面，在将具有该顶盖组件1的电池装配至电池模组的固定支架时，可以利用该第一倒角122引导铆接块12穿设于固定支架上的限位槽内，从而可以起到导引的作用，并可以起到较好的定位以及限位效果，进而可以保证顶盖组件1上的防爆阀对应固定支架上的避空槽设置，以保证防爆阀可以实现避空，在热失控时能及时排气，实现防爆效果，以使电池的内部和外部的气压平衡，提高电池的使用安全性，避免带来安全隐患。
一些实施例中，结合图3、图4和图6所示，顶盖组件1还包括上塑胶件13、顶盖板14和下塑胶件15，铆接块12、上塑胶件13、顶盖板14和下塑胶件15依次叠放设置并沿铆接块12的厚度方向依次排列设置，例如，铆接块12、上塑胶件13、顶盖板14和下塑胶件15沿图3和图4中的上下方向依次排列设置，极柱11依次穿设于第一铆接孔段1211、上塑胶件13、顶盖板14和下塑胶件15，也即是，该上塑胶件13设有第一贯通孔131， 顶盖板14设有第二贯通孔141，下塑胶件15设有第三贯通孔151，第一铆接孔段1211、第一贯通孔131、第二贯通孔141和第三贯通孔151依次相对且连通，则极柱11依次穿设于第一铆接孔段1211、第一贯通孔131、第二贯通孔141和第三贯通孔151。该极柱11的背离冲压端111的一端设有凸边112，该凸边112沿极柱11的周向方向延伸并凸出于极柱11的外周面，且凸边112位于下塑胶件15的背离顶盖板14的一侧且与下塑胶件15相止抵。如此设置的凸出于极柱11的外周面的凸边112，可以利用该凸边112和下塑胶件15的抵接作用提高极柱11的安装稳固性；同时还便于与其他结构形成密封结构，提高顶盖组件1的密封性。
一些实施例中，凸边112的朝向冲压端111的表面、第三贯通孔151的内周壁、顶盖板14的朝向凸边112且凸出于第三贯通孔151的内周壁的表面限定出密封腔152，也即是，凸边112具有朝向冲压端111的第一表面，第三贯通孔151具有第一内周壁，顶盖板14具有朝向凸边112且凸出于第一内周壁的第二表面，该第一表面、第一内周壁和第二表面之间形成密封腔152，该密封腔152内设有密封件16。密封件16的设置，不但能够使顶盖板14、极柱11、上塑胶件13及下塑胶板实现密封连接，还能够在冲压极柱11的冲压端111时保护其他结构，避免其他结构的损坏，提升顶盖组件1的成品率。其中，该密封件16可为硅胶圈、橡胶圈、塑胶圈或泡棉圈等。
进一步地，顶盖板14的第二贯通孔141的内周壁和极柱11的外周面之间具有第二间隙142，也即是，第二贯通孔141具有第二内周壁，该第二内周壁和极柱11的外周面之间具有第二间隙142，该第二间隙142与密封腔152连通，也即是，密封腔152在靠近第二间隙142的位置处具有开口，密封腔152通过该开口与第二间隙142连通。这样，当密封件16装配至密封腔152内时，密封腔152的内壁对密封件16进行挤压，在挤压力的作用下，密封件16发生形变，由于密封腔152与第二间隙142连通，密封件16朝向第二间隙142形变，以使密封件16形成相互连接的第一部分161和第二部分162，其中，密封件16的第一部分161位于密封腔152中，以密封于密封腔152，而密封件16的第二部分162位于第二间隙142中，以密封于第二间隙142，此时密封件16可以封堵密封腔152与第二间隙142连通的开口，由此可以提升密封件16的密封效果；同时由于密封件16有部分(即密封件16的第二部分162)位于第二间隙142中并密封第二间隙142，这说明密封件16的第二部分162还会受到第二间隙142的束缚，由此可以提高密封件16在密封腔152中的安装稳定性。
一些实施例中，该上塑胶件13的外周面对应第一倒角122的位置设有第二倒角132。这样，在将具有该顶盖组件1的电池装配至电池模组的固定支架时，可以利用该第二倒角132和第一倒角122共同引导铆接块12和上塑胶件13穿设于固定支架上的限位槽内，可以起到更好的导引作用，并可以起到更好的定位以及限位效果，进而使得顶盖组件1上的防爆阀可以更加精准地对应固定支架上的避空槽设置，以保证防爆阀可以实现百分百避空，在热失控时能及时排气，实现防爆效果，以使电池的内部和外部的气压平衡，提高电池的使用安全性，避免带来安全隐患。
请参阅图7和图8，图7是本申请实施例第二方面公开的电池的结构示意图，图8是本申请实施例第二方面公开的电池的结构分解示意图，本申请还公开了一种电池，该电池2具有如上述实施例所述的顶盖组件1。该电池2可为二次电池，示例性地，该电池2还可以包括壳体21以及电芯22，壳体21具有容纳腔211，该容纳腔211形成为前文中所述的电池2的内部，且该容纳腔211具有连通于外部空间的开口212，顶盖组件1固定连接于壳体21且封闭该开口212，电芯22设于容纳腔211内。可以理解的，具有上述实施例 所述的顶盖组件1的电池，也具有上述顶盖组件1的全部技术效果。即，所述电池能够提高极柱和铆接块铆接后的稳定性，以使极柱和铆接块之间的结合牢固可靠，这样不仅可以确保极柱和铆接块之间具有较大的接触面积，以降低极柱与铆接块铆接后的接触内阻，从而提高极柱与铆接块之间的过流能力；同时还可以提高极柱的抗扭转能力，以避免极柱和铆接块之间出现扭转疲劳而出现密封不良的情况，提升顶盖组件1的密封性。由于上述技术效果已在顶盖组件1的实施例中做了详细介绍，此处就不再赘述。
本申请还公开了一种用电设备，该用电设备(未图示)具有如上述实施例所述的电池。该用电设备可应用于汽车、工业设备(如机床)或家用设备(如空调、电视等)等，作为汽车、工业设备或家用设备等的操作电源，用于汽车、工业设备或家用设备等的启动、运行时的工作用电需求。可以理解的，具有上述实施例所述的电池的用电设备，由于该电池具有上述顶盖组件，所以该用电设备也具有上述顶盖组件的全部技术效果。即，所述用电设备能够提高极柱和铆接块铆接后的稳定性，以使极柱和铆接块之间的结合牢固可靠，这样不仅可以确保极柱和铆接块之间具有较大的接触面积，以降低极柱与铆接块铆接后的接触内阻，从而提高极柱与铆接块之间的过流能力；同时还可以提高极柱的抗扭转能力，以避免极柱和铆接块之间出现扭转疲劳而出现密封不良的情况，提升顶盖组件的密封性。由于上述技术效果已在顶盖组件的实施例中做了详细介绍，此处就不再赘述。
以上对本申请实施例公开的顶盖组件、电池及用电设备进行了详细介绍，本文中应用了具体个例对本申请的原理及实施方式进行了阐述，以上实施例的说明只是用于帮助理解本申请的顶盖组件、电池及用电设备及其核心思想；同时，对于本领域的一般技术人员，依据本申请的思想，在具体实施方式及应用范围上均会有改变之处，综上，本说明书内容不应理解为对本申请的限制。

Claims (14)

  1. 一种顶盖组件，所述顶盖组件包括：
    极柱，所述极柱具有冲压端；以及
    铆接块，所述铆接块贯穿设置有铆接孔，所述铆接孔包括相互连通的第一铆接孔段和第二铆接孔段，所述第一铆接孔段用于和所述极柱相配合，所述第二铆接孔段用于与铆压后的极柱的冲压端相配合；
    在所述铆接块的厚度方向上，所述铆接块的厚度为h1，所述第二铆接孔段的孔深为h2，h1/2-0.5≤h2≤h1/2+0.5。
  2. 根据权利要求1所述的顶盖组件，其中，所述冲压端的端面设有定位孔，所述定位孔用于与铆针的凸起配合连接。
  3. 根据权利要求2所述的顶盖组件，其中，在所述铆接块的厚度方向上，所述定位孔的孔深为h3，h2-0.5≤h3≤h2+0.5。
  4. 根据权利要求2所述的顶盖组件，其中，所述定位孔为锥形孔，所述定位孔的锥角为α，90°≤α≤150°。
  5. 根据权利要求1所述的顶盖组件，其中，所述极柱的外周面和所述第一铆接孔段的内表面之间具有第一间隙。
  6. 根据权利要求5所述的顶盖组件，其中，在垂直于所述铆接块的厚度方向的方向上，所述第一间隙的尺寸为d，0.05mm≤d≤0.10mm。
  7. 根据权利要求1-6任一项所述的顶盖组件，其中，所述第二铆接孔段的径向尺寸大于所述第一铆接孔段的径向尺寸，以构造出台阶部，所述台阶部与所述冲压端相止抵。
  8. 根据权利要求1-6任一项所述的顶盖组件，其中，所述顶盖组件还包括上塑胶件、顶盖板和下塑胶件，所述铆接块、所述上塑胶件、所述顶盖板和所述下塑胶件依次叠放设置，所述上塑胶件设有第一贯通孔，所述顶盖板设有第二贯通孔，所述下塑胶件设有第三贯通孔，所述第一铆接孔段、所述第一贯通孔、所述第二贯通孔和所述第三贯通孔依次相对且连通，所述极柱依次穿设于所述第一铆接孔段、所述第一贯通孔、所述第二贯通孔和所述第三贯通孔；
    所述极柱的背离所述冲压端的一端设有凸边，所述凸边沿所述极柱的周向方向延伸并凸出于所述极柱的外周面，且所述凸边位于所述下塑胶件的背离所述顶盖板的一侧且与所述下塑胶件相止抵。
  9. 根据权利要求8所述的顶盖组件，其中，所述凸边具有朝向所述冲压端的第一表面，所述第三贯通孔具有第一内周壁，所述顶盖板具有朝向所述凸边且凸出于所述第一内周壁的第二表面，所述第一表面、所述第一内周壁和所述第二表面之间形成密封腔，所述密封腔内设有密封件。
  10. 根据权利要求9所述的顶盖组件，其中，所述第二贯通孔具有第二内周壁，所述第二内周壁和所述极柱的外周面之间具有第二间隙，所述第二间隙与所述密封腔连通，所述密封件包括相互连接第一部分和第二部分，所述第一部分密封设置于所述密封腔中，所述第二部分密封设置于所述第二间隙中。
  11. 根据权利要求1-6任一项所述的顶盖组件，其中，所述铆接块的周侧面设有第一倒角。
  12. 根据权利要求10所述的顶盖组件，其中，所述顶盖组件还包括上塑胶件，所述铆接块和所述上塑胶件沿所述铆接块的厚度方向依次排列，所述极柱依次穿设于所述第一铆接孔段和所述上塑胶件，所述上塑胶件的外周面对应所述第一倒角的位置设有第二倒角。
  13. 一种电池，所述电池具有如权利要求1-12任一项所述的顶盖组件。
  14. 一种用电设备，所述用电设备具有如权利要求13所述的电池。
PCT/CN2022/143989 2022-08-29 2022-12-30 顶盖组件、电池及用电设备 Ceased WO2024045458A1 (zh)

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