KR-20260067696-A - Battery cell having electrode terminal capable of being connected to connector for charging and discharging, battery pack, and vehicle comprising same

KR20260067696AKR 20260067696 AKR20260067696 AKR 20260067696AKR-20260067696-A

Abstract

A battery cell, a battery pack, and an automobile including the same are disclosed, which are securely connected yet easy to detach by configuring positive/negative terminals protruding from the upper surface of a battery housing so as to be connected to a charge/discharge connector. A battery cell according to an embodiment of the present invention comprises: an electrode assembly; a battery housing that accommodates the electrode assembly; a current collector plate provided within the battery housing and electrically connected to a first electrode of the electrode assembly; a first electrode terminal provided on the upper surface of the battery housing and electrically connected to the current collector plate; and a second electrode terminal provided on the upper surface of the battery housing, insulated from the first electrode terminal, and electrically connected to the battery housing. The first electrode terminal and the second electrode terminal are arranged to have a coaxial orientation and protrude from the upper surface of the battery housing.

Inventors

한상엽

Assignees

주식회사 엘지에너지솔루션

Dates

Publication Date: 20260513
Application Date: 20241106

Claims (15)

Electrode assembly; A battery housing that accommodates the above electrode assembly; A current collector plate provided within the battery housing and electrically connected to the first electrode of the electrode assembly; A first electrode terminal provided on the upper surface of the battery housing and electrically connected to the current collector plate; and A second electrode terminal that is insulated from the first electrode terminal and provided on the upper surface of the battery housing and electrically connected to the battery housing; The first electrode terminal and the second electrode terminal are arranged to have a coaxial shape and protrude from the upper surface of the battery housing. Battery cell.
In claim 1, Insulator further comprising an insulator interposed in a ring shape between the first electrode terminal and the second electrode terminal to insulate between the first electrode terminal and the second electrode terminal. Battery cell.
In claim 2, The above first electrode terminal is A coupling part coupled to the above-mentioned collector plate; An insertion part provided to have an outer diameter corresponding to the inner diameter of the insulator, inserted into the interior of the insulator, and connected to the center of the coupling part; and A protruding terminal comprising a protruding portion that protrudes above the insertion portion and is provided to have a diameter that is radially expanded compared to the insertion portion. Battery cell.
In claim 3, The second electrode terminal is bent upward from an opening formed in the center of the upper surface of the battery housing and extends upward, and The second electrode terminal is formed to have an outer diameter equal to the outer diameter of the protruding terminal. Battery cell.
In claim 2, The insulator is provided between the first electrode terminal and the current collector plate, and The above insulator A cylindrical insulating part inserted into the inner diameter of the second electrode terminal; A circular ring-shaped upper insulating portion extending radially outward from the periphery of a first opening provided on one side of the cylindrical insulating portion and insulating the upper surface of the second electrode terminal from the first electrode terminal; and A circular ring-shaped lower insulating portion extending radially outward from the periphery of a second opening provided on the other side of the cylindrical insulating portion, and insulating the lower portion of the second electrode terminal from the first electrode terminal and the current collector plate. Battery cell.
In claim 1, The above second electrode terminal is It is provided in a cylindrical shape protruding in a first direction toward the outside of the battery housing from the upper surface of the battery housing, and The above first electrode terminal is Extending from the current collector plate in the first direction through the internal space of the second electrode terminal and protruding to the upper part of the second electrode terminal, Battery cell.
In claim 1, The first electrode terminal and the second electrode terminal are coupled to a charge/discharge connector, and charging or discharging is performed by the charge/discharge connector. The first electrode terminal and the second electrode terminal are formed to have an outer diameter corresponding to the inner diameter of the charge/discharge connector. Battery cell.
In claim 7, The above first electrode terminal is A mounting groove having a ball plunger provided within the charge/discharge connector that can be mounted along the outer circumference of the first electrode terminal protruding above the second electrode terminal, Battery cell.
In claim 8, The above mounting groove is formed as an inclined surface that is wider at the top and narrower at the bottom, with the inner diameter decreasing towards the bottom. Battery cell.
In claim 7, The first electrode terminal is in contact with the first charge/discharge terminal provided in the charge/discharge connector, and The second electrode terminal above is in contact with the second charge/discharge terminal provided in the charge/discharge connector, Battery cell.
In claim 10, The first electrode terminal is provided such that the outer periphery of the first electrode terminal contacts the first charge/discharge terminal at the upper portion of the second electrode terminal, and The second electrode terminal is provided such that the outer periphery of the second electrode terminal contacts the second charge/discharge terminal. Battery cell.
In claim 11, The outer periphery of the first electrode terminal and the outer periphery of the second electrode terminal A spaced apart by the distance between the first charge/discharge terminal and the second charge/discharge terminal, Battery cell.
In claim 7, The corner portion between the upper surface and the outer periphery of the first electrode terminal above A shape formed as an inclined or curved surface along the periphery of the first electrode terminal to induce coupling of the above-mentioned charge/discharge connector, Battery cell.
A battery pack comprising at least one battery cell as described in any one of claims 1 to 13.
An automobile comprising at least one battery pack as described in claim 14.

Description

Battery cell having electrode terminal capable of being connected to a charging and discharging connector, battery pack, and vehicle comprising same The present invention relates to a battery cell, a battery pack, and an automobile including the same, and more specifically, to a battery cell, a battery pack having an electrode terminal connectable to a charge/discharge connector, and an automobile including the same. Rechargeable batteries are attracting attention as an energy source for enhancing eco-friendliness and energy efficiency because they possess high energy density and the advantage of significantly reducing fossil fuel usage, as well as the advantage of not generating byproducts from energy consumption. Due to these advantages, rechargeable batteries are widely applied not only to portable devices but also to electric vehicles (EVs) or hybrid electric vehicles (HEVs) powered by electric sources. When a high output voltage is required, multiple unit rechargeable battery cells, or battery cells, can be connected in series to form a battery pack that supplies the output voltage. Additionally, a battery pack can be configured by connecting multiple battery cells in parallel, depending on the required charge/discharge capacity. The number of battery cells included in a battery pack can be varied according to the required output voltage and/or charge/discharge capacity. Lithium secondary batteries are classified according to the shape of the battery case into prismatic and cylindrical secondary batteries, in which the electrode assembly is embedded in a metal battery can (battery housing), and pouch-type secondary batteries, in which the electrode assembly is embedded in a pouch case made of an aluminum laminate sheet. A cylindrical battery cell comprises an electrode assembly including a positive electrode, a negative electrode, and a separator, and a cylindrical battery housing that accommodates the electrode assembly. In the case of a cylindrical battery cell, a terminal (rivet) provided on the closing side of the battery can penetrates the closing part and comes into contact with a current collector plate placed on the inside of the battery can. In the case of positive/negative terminals where the terminals exposed to the outside of the battery housing are in a flat form, contact failures frequently occur during charging/discharging, and there is a problem that recycling is difficult after assembly through welding. The background technology described above is intended to explain the background in which the present invention was derived and does not imply that it is technology known prior to the filing of the present invention. FIG. 1 is a perspective view showing a battery cell according to one embodiment of the present invention. FIG. 2 is a cross-sectional view of a battery cell according to an embodiment of FIG. 1. Figure 3 is a cross-sectional view showing an enlarged view of part 'A' of Figure 2. Figure 4 is a cross-sectional view showing an enlarged view of section 'B' of Figure 3. FIG. 5 is a perspective view showing an electrode assembly constituting a battery cell according to one embodiment of the present invention. FIG. 6 is a perspective view showing the state before the charge/discharge connector is coupled to the battery cell according to an embodiment of the present invention, viewed from above. FIG. 7 is a perspective view showing the state of a battery cell according to an embodiment of the present invention before a charge/discharge connector is coupled, as viewed from below. FIG. 8 is a perspective view showing a battery cell with a charge/discharge connector coupled thereto according to an embodiment of the present invention. FIG. 9 is a cross-sectional view showing a charge/discharge connector according to one embodiment of the present invention. Figure 10 is a cross-sectional view showing an enlarged view of section 'C' of Figure 9. FIG. 11 is a perspective view showing the appearance of a charge/discharge connector according to an embodiment of the present invention before being coupled to a plurality of battery cells. FIG. 12 is a perspective view showing a charge/discharge connector according to an embodiment of the present invention coupled to a plurality of battery cells. FIG. 13 is a perspective view showing a charge/discharge connector according to another embodiment of the present invention. Figure 14 is an enlarged view of section 'D' of Figure 13. FIG. 15 is a cross-sectional view along the EE' line of the charge/discharge connector shown in FIG. 14. FIG. 16 is a perspective view showing an unlocking device constituting a charge/discharge connector according to the embodiment of FIG. 13. FIG. 17 is a cross-sectional view along the FF' line of the charge/discharge connector shown in FIG. 14. FIG. 18 is a drawing showing the charging/discharging connector according to the embodiment of FIG. 13 being mounted on a battery cell. FIG. 19 is a cross-sectional view showing