Search

CN-224204318-U - Self-riveting type pole assembly and battery top cover

CN224204318UCN 224204318 UCN224204318 UCN 224204318UCN-224204318-U

Abstract

The application discloses a self-riveting type pole column assembly and a battery top cover, which comprise a convex terminal and a concave pressure ring, wherein a convex part of the convex terminal is matched with a groove of the concave pressure ring, a first avoiding groove is formed in the inner side of the groove of the concave pressure ring, a second avoiding groove opposite to an opening of the groove is formed in the outer side of the groove of the concave pressure ring, when the convex terminal is connected with the concave pressure ring in a self-riveting mode, the convex part of the convex terminal is extruded and deformed and in interference fit with the first avoiding groove, and the first avoiding groove is extruded and deformed towards the second avoiding groove by the convex part of the convex terminal, so that the convex terminal and the concave pressure ring form self-riveting type interference fit connection. The self-riveting type terminal is based on the self-riveting connection between the convex terminal and the concave pressing ring, so that the convex part of the convex terminal is in interference fit with the first avoidance groove arranged in the concave pressing ring due to extrusion deformation, and further, the self-riveting type stable connection of the pole assembly without filling materials is realized, and the self-riveting type terminal has the characteristics of simplicity in assembly, low resistance, high reliability, long service life and low cost.

Inventors

  • ZHANG YUEQING

Assignees

  • 湖南欣齐科技有限公司

Dates

Publication Date
20260505
Application Date
20250521

Claims (5)

  1. 1. The utility model provides a from riveting formula utmost point post subassembly, its characterized in that, includes protruding type terminal (1) and concave type clamping ring (2), the convex part of protruding type terminal (1) matches with the recess of concave type clamping ring (2), and the recess inboard of concave type clamping ring (2) is equipped with first groove (3) of dodging, and the recess outside of concave type clamping ring (2) is equipped with second that is opposite with the recess opening dodges groove (4), and when protruding type terminal (1) are from riveting with concave type clamping ring (2), the convex part of protruding type terminal (1) is by extrusion deformation and with first groove (3) interference fit of dodging, and first groove (3) are dodged by the convex part extrusion of protruding type terminal (1) and are warp towards second dodging groove (4), and then make protruding type terminal (1) constitute from riveting type interference fit with concave type clamping ring (2) and be connected.
  2. 2. Self-riveting pole assembly according to claim 1, characterized in that the side of the male terminal (1) facing away from the male part is provided with a guiding groove (5) for mating with an external pressing device.
  3. 3. The utility model provides a self-riveting formula battery top cap, a serial communication port, contain top cap body (6), lower plastic (7) and the self-riveting formula utmost point post subassembly of any one of claims 1-2, top cap body (6) are located the top of plastic (7) down, and all symmetry is provided with two through-holes that are used for installing self-riveting formula utmost point post subassembly on top cap body (6) and the plastic (7) down, the outside of every concave clamping ring (2) all is connected with extension (8), extension (8) constitute cavity (9) with the outside of corresponding protruding type terminal (1), be equipped with sealing washer (10) and last plastic (11) in cavity (9), go up plastic (11) and set up between top cap body (6) and protruding type terminal (1), sealing washer (10) set up between top cap body (6) and concave clamping ring (2) and with lower plastic (7) butt joint in cavity (9).
  4. 4. A self-riveting battery top cover according to claim 3, characterized in that explosion-proof holes are formed in the top cover body (6) and the lower plastic (7), and explosion-proof valves (12) are arranged in the explosion-proof holes.
  5. 5. Self-riveting battery top cover according to claim 4, characterized in that the upper side of the explosion-proof valve (12) is covered with a protective film (13).

Description

Self-riveting type pole assembly and battery top cover Technical Field The utility model relates to the technical field of battery pole assemblies and battery top covers, in particular to a self-riveting pole assembly and a battery top cover. Background Under the background of rapid development of new energy automobiles and energy storage battery industries, power batteries and energy storage systems have higher requirements on energy density, cycle life and manufacturing cost. The electrode material is used as a core component for realizing the charge and discharge functions of the battery, and the performance of the electrode material directly influences the overall performance of the battery. At present, the copper-aluminum composite material is widely applied to a negative current collector of a power battery and an electrode structure of an energy storage battery by virtue of the advantages of high conductivity of copper, light weight and low cost of aluminum. The traditional copper-aluminum composite electrode structure mainly adopts a welding or mechanical crimping process to realize copper-aluminum connection. Brittle intermetallic compounds (e.g., cuAl 2、Cu9Al4) are easily produced at the cu-al interface by high temperatures during welding processes, such as ultrasonic welding, laser welding, and the like. These compounds not only have poor conductivity (conductivity is only 1/10-1/20 of that of copper), but also can continuously grow along with the charge-discharge cycle of the battery, so that the impedance of the electrode continuously rises, and the charge-discharge efficiency and the cycle life of the battery are seriously affected. Meanwhile, the high temperature in the welding process is easy to cause material deformation, the flatness of the electrode structure is damaged, and the consistency of battery assembly is reduced. Although the mechanical crimping process avoids the thermal effect, the close contact of the copper-aluminum interface is difficult to ensure, and under the stress effect generated by frequent charge and discharge of the battery, gaps are easily generated on the contact interface due to creep and fretting wear, so that the contact resistance is increased. In addition, the existing copper-aluminum composite electrode structure generally needs an additional negative electrode plate or an intermediate transition layer (such as a nickel layer) to realize electrical connection and mechanical fixation, which not only increases the material cost and assembly complexity of the battery, but also introduces an additional interface resistance, and limits the improvement of the energy density of the battery. Disclosure of utility model In order to solve the technical problems, the utility model provides a self-riveting type pole assembly and a battery top cover, which comprise a convex terminal and a concave pressing ring, wherein a convex part of the convex terminal is matched with a groove of the concave pressing ring, a first avoiding groove is formed in the inner side of the groove of the concave pressing ring, a second avoiding groove opposite to an opening of the groove is formed in the outer side of the groove of the concave pressing ring, when the convex terminal is connected with the concave pressing ring in a self-riveting mode, the convex part of the convex terminal is extruded and deformed and in interference fit with the first avoiding groove, and the first avoiding groove is extruded and deformed towards the second avoiding groove by the convex part of the convex terminal, so that the convex terminal and the concave pressing ring form self-riveting type interference fit connection. In some embodiments, a side of the male terminal remote from the male portion is provided with a guide groove that matingly interfaces with an external pressing device. The application also provides a self-riveting battery top cover, which comprises a top cover body, lower plastic and the self-riveting pole assembly as claimed in any one of the claims, wherein the top cover body is positioned above the lower plastic, two through holes for installing the self-riveting pole assembly are symmetrically formed in the top cover body and the lower plastic, the outer side of each concave pressing ring is connected with an extension part, a cavity is formed by the extension part and the outer side of the corresponding convex terminal, a sealing ring and upper plastic are arranged in the cavity, the upper plastic is arranged between the top cover body and the convex terminal, and the sealing ring is arranged between the top cover body and the concave pressing ring and is in butt joint with the lower plastic in the cavity. In some embodiments, explosion-proof holes are formed in the top cover body and the lower plastic, and explosion-proof valves are installed in the explosion-proof holes. In some embodiments, the upper side of the explosion-proof valve is covered with a protective film. Compared with