KR-20260067697-A - Connector for charging and discharging of battery cell, battery pack, and vehicle comprising same

Abstract

A charge/discharge connector capable of being connected to an electrode terminal (positive/negative terminal) protruding coaxially from the upper surface of a battery housing constituting a battery cell, a battery pack including the same, and an automobile including the same are disclosed. The charge/discharge connector of a battery cell according to an embodiment of the present invention is a charge/discharge connector provided for charging and discharging a battery cell in which an electrode assembly, comprising a first electrode, a second electrode, and a separator wound in a roll form, is housed in a battery housing, and is provided to be electrically connected to a first electrode terminal and a second electrode terminal protruding upward from the upper surface of the battery housing. The charge/discharge connector of the battery cell includes a connector portion having an insertion groove into which a first electrode terminal and a second electrode terminal protruding upward from the upper surface of the battery housing can be inserted; a first charge/discharge terminal provided within the insertion groove of the connector portion and connected to the outer circumference of the first electrode terminal; and a second charge/discharge terminal provided within the insertion groove of the connector portion and connected to the outer circumference of the second electrode terminal.

Inventors

• 한상엽

Assignees

• 주식회사 엘지에너지솔루션

Dates

Publication Date

20260513

Application Date

20241106

Claims (15)

1. A charge/discharge connector provided for charging and discharging a battery cell in which an electrode assembly, comprising a first electrode, a second electrode, and a separator wound in a roll shape, is housed in a battery housing. It is provided to be electrically connected to a first electrode terminal and a second electrode terminal protruding from the upper part of the battery housing, and A connector portion having an insertion groove into which the first electrode terminal and the second electrode terminal can be inserted, protruding upward from the upper surface of the battery housing; A first charge/discharge terminal provided within the insertion groove of the connector portion and connected to the outer periphery of the first electrode terminal; and A second charge/discharge terminal provided within the insertion groove of the connector portion and connected to the outer periphery of the second electrode terminal; comprising Battery cell charge/discharge connector.
2. In claim 1, The first charge/discharge terminal and the second charge/discharge terminal are spaced apart by the distance between the first electrode terminal and the second electrode terminal. Battery cell charge/discharge connector.
3. In claim 1, The above first charge/discharge terminal and the above second charge/discharge terminal are Formed to have the same outer diameter corresponding to the outer diameters of the first electrode terminal and the second electrode terminal of the battery cell, Battery cell charge/discharge connector.
4. In claim 1, A ball plunger provided within the insertion groove of the connector portion and capable of being fixed in a mounting groove provided between the first electrode terminal and the second electrode terminal; further comprising Battery cell charge/discharge connector.
5. In claim 4, The above ball plunger Provided to protrude inward toward the center of the insertion groove, compared to the inner diameter portion of the first charge/discharge terminal and the inner diameter portion of the second charge/discharge terminal. Battery cell charge/discharge connector.
6. In claim 1, It further includes a connector connection portion provided on the upper part of the connector portion, and The above connector connection part A buffer portion provided on the upper part of the first charge/discharge terminal and the second charge/discharge terminal to buffer the connector portion, Battery cell charge/discharge connector.
7. In claim 6, The above buffer A buffer spring that buffers the charge/discharge connector when the charge/discharge connector is connected to the first electrode terminal and the second electrode terminal, and applies pressure to the first electrode terminal and the second electrode terminal during charging; Battery cell charge/discharge connector.
8. In claim 7, The above buffer A corrugated member provided along the circumference of the connector connection portion at a position corresponding to the buffer spring; further comprising Battery cell charge/discharge connector.
9. In claim 8, The above connector connection part A lower connector connection part that supports the above connector part and is provided with a cushioning groove; It includes an upper connector connection part provided on the upper part of the lower connector connection part and coupled to the lower connector connection part, and The upper connector connection part above A cushioning guide part coupled to the above cushioning groove and guiding cushioning in the up and down direction, Battery cell charge/discharge connector.
10. In claim 9, The above buffer spring is Interposed to surround the cushioning guide portion between the upper surface of the lower connector connection portion and the step of the upper connector connection portion, Battery cell charge/discharge connector.
11. In claim 9, It further includes a first wire connected to the first charge/discharge terminal and a second wire connected to the second charge/discharge terminal, The first wire and the second wire transmit an electrical signal along the connector connection part through the buffer guide part. Battery cell charge/discharge connector.
12. In claim 9, The above buffer groove extends in the vertical direction to guide the above buffer guide part, and The upper part of the above buffer groove is provided with a locking part that prevents the buffer guide part from coming off. Battery cell charge/discharge connector.
13. In claim 1, The first charge/discharge terminal is provided in the shape of a ring having an inner diameter corresponding to the outer diameter of the first electrode terminal, and The second charge/discharge terminal is provided in a ring shape having an inner diameter corresponding to the outer diameter of the second electrode terminal. Battery cell charge/discharge connector.
14. A battery pack comprising a charge/discharge connector as described in any one of claims 1 to 13, and at least one battery cell coupled to said charge/discharge connector.
15. An automobile comprising at least one battery pack as described in claim 14.

Description

Connector for charging and discharging of battery cell, battery pack, and vehicle comprising same The present invention relates to a charge/discharge connector for a battery cell, a battery pack, and an automobile including the same, and more specifically, to a charge/discharge connector connectable to an electrode terminal of a battery cell, a battery pack equipped with the same, 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 to which a charge/discharge connector according to one embodiment of the present invention is coupled. 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 to which a charge/discharge connector according to one embodiment of the present invention is coupled. FIG. 6 is a perspective view showing the state of a charge/discharge connector according to an embodiment of the present invention before it is coupled to a battery cell, viewed from above. FIG. 7 is a perspective view showing the state of a charge/discharge connector according to an embodiment of the present invention before it is coupled to a battery cell, viewed from below. FIG. 8 is a perspective view showing a charge/discharge connector according to an embodiment of the present invention coupled to a battery cell. 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 drawing for explaining a battery pack including a battery cell according to an embodiment of the present invention. FIG. 14 is a drawing for explaining a vehicle including the battery pack of FIG. 13. The advantages and features of the present invention and the methods for achieving them will become clear by referring to the embodiments described below in detail together with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below but may be implemented in various different forms. These embodiments are provided merely to ensure that the disclosure