EP-4738536-A2 - BATTERY ASSEMBLY

EP4738536A2EP 4738536 A2EP4738536 A2EP 4738536A2EP-4738536-A2

Abstract

The present disclosure relates to a battery assembly comprising: a plurality of battery cells having a cylindrical shape; a receiving member forming a placement space for receiving the plurality of battery cells; and a receiving case including a receiving space for receiving the plurality of battery cells and the receiving member, a receiving floor forming a bottom surface of the receiving space and including a communication hole, a venting space disposed below the receiving floor, and a communication hole formed on the receiving floor to communicate the receiving space and the venting space.

Inventors

KWAK, Seung Il
Jeon, Hae Ryong

Assignees

SK On Co., Ltd.

Dates

Publication Date: 20260506
Application Date: 20250930

Claims (15)

A battery assembly comprising: a plurality of battery cells having a cylindrical shape; a receiving member forming a placement space for receiving the plurality of battery cells; and a receiving case including a receiving space for receiving the plurality of battery cells and the receiving member, a receiving floor forming a bottom surface of the receiving space and including a communication hole, a venting space disposed below the receiving floor, and a communication hole formed on the receiving floor to communicate the receiving space and the venting space; wherein the receiving member includes a supporting portion forming a bottom surface of the receiving member and supported by the receiving floor, a curved portion extending from the supporting portion toward the plurality of battery cells and formed as a curved surface corresponding to a portion of each outer peripheral surface of the plurality of battery cells and facing the plurality of battery cells, and a through-hole penetrating the supporting portion at a location corresponding to the communication hole.
The battery assembly according to claim 1, wherein the curved portion has a wavy shape.
The battery assembly according to claim 1 or 2, further comprising: a heat dissipation portion positioned between the curved portion and the plurality of battery cells.
The battery assembly according to preceding claims, wherein the curved portion and the supporting portion are provided with an insulation coating.
The battery assembly according to preceding claims, wherein the curved portion includes a first body and a second body arranged with the plurality of battery cells therebetween, wherein the supporting portion includes a first bottom extending from one end of the first body toward the second body, a first recess in which a portion of one edge of the first bottom is recessed in a direction away from the second body, a second bottom extending from one end of the second body toward the first body, and a second recess in which a portion of one edge of the second bottom is recessed in a direction away from the first body at a location corresponding to the first recess, and wherein the first recess and the second recess are connected to each other to form the through-hole when the first bottom and the second bottom are connected.
The battery assembly according to claim 5, wherein the first body, the first bottom, the second body, and the second bottom are formed of the same material.
The battery assembly according to claim 5, wherein the first body, the first bottom, the second body, and the second bottom are formed of different materials.
The battery assembly according to preceding claims, wherein the curved portion includes the first body and the second body arranged with the plurality of battery cells interposed therebetween, and the supporting portion extends from one end of the first body and is connected to one end of the second body.
The battery assembly according to preceding claims, wherein the through-hole and the communication hole are each provided in a plurality, and the through-holes are arranged to correspond one-to-one to the communication holes.
The battery assembly according to claim 9, wherein an imaginary central axis of any one of the battery cells passes through any one of the through-holes corresponding to the one of the battery cells.
The battery assembly according to preceding claims, wherein the through-hole extends along an alignment direction of the plurality of battery cells and overlaps with the communication hole.
The battery assembly according to preceding claims, wherein the curved portion is provided in a zigzag shape, and the placement space is divided into a plurality of spaces so that the battery cells are received in the plurality of spaces respectively between the curved portions.
The battery assembly according to claim 12, wherein the receiving member further includes side portions extending from a periphery of the supporting portion and surrounding at least a portion of the plurality of battery cells.
The battery assembly according to preceding claims, wherein a gas is generated in any one of the battery cells, and at least a portion of the gas moves into the venting space through the through-hole and the communication hole.
A battery assembly comprising: a plurality of stacking assemblies including a supporting portion forming a bottom surface of a placement space for a plurality of battery cells and a curved portion extending from the supporting portion toward the plurality of battery cells and formed as a curved surface in a wavy shape corresponding to a portion of each outer peripheral surface of the plurality of battery cells and facing the plurality of battery cells; a busbar electrically connected to the plurality of battery cells; a receiving case forming a receiving space for receiving the plurality of stacking assembly; and a partition compartmentalizing the receiving space.

Description

BACKGROUND OF THE INVENTION 1. Field The present disclosure relates to a battery assembly. More particularly, it relates to a battery assembly with improved thermal stability and manufacturing efficiency. 2. Description of the Related Art In the battery manufacturing process of manufacturing a battery pack using cylindrical battery cells, individual cylindrical battery cells are installed inside the battery pack instead of grouping a plurality of cylindrical battery cells. Therefore, the manufacturing process of the battery pack is complicated and the manufacturing efficiency of the battery pack is reduced, and it is necessary to improve it. In addition, conventional battery packs manufactured using cylindrical battery cells do not cool the cylindrical battery cells effectively because they cool the cylindrical battery cells only through the lower part of the cylindrical battery cells. According to one aspect of the present disclosure, an object of the present disclosure is to provide a battery pack including a structure capable of suppressing heat propagation between cylindrical battery cells. In another aspect of the present disclosure, an object of the present disclosure is to reduce the temperature variation of cylindrical battery cells received in a battery pack. In another aspect of the present disclosure, an object of the present disclosure is to effectively cool the cylindrical battery cells received in the battery pack. In another aspect of the present disclosure, an object of the present disclosure is to modularize cylindrical battery cells. In another aspect of the present disclosure, an object of the present disclosure is to simplify the manufacturing process of battery cells. In another aspect of the present disclosure, an object of the present disclosure is to improve the manufacturing efficiency of battery cells. Furthermore, the present disclosure can be widely applied to electric vehicles, battery charging stations, energy storage systems (ESS), and other green technology fields such as photovoltaics and wind power using battery cells. In addition, the battery assembly according to the present disclosure and the battery cell including the same can be used for eco-friendly mobility and the like including electric vehicles and hybrid vehicles for preventing climate change by suppressing air pollution and greenhouse fluid emission. SUMMARY OF THE INVENTION A battery assembly according to an embodiment of the present disclosure may comprise: a plurality of battery cells having a cylindrical shape; a receiving member forming a placement space for receiving the plurality of battery cells; and a receiving case including a receiving space for receiving the plurality of battery cells and the receiving member, a receiving floor forming a bottom surface of the receiving space and including a communication hole, a venting space disposed below the receiving floor, and a communication hole formed on the receiving floor to communicate the receiving space and the venting space; wherein the receiving member may include a supporting portion forming a bottom surface of the receiving member and supported by the receiving floor, a curved portion extending from the supporting portion toward the plurality of battery cells and formed as a curved surface corresponding to a portion of each outer peripheral surface of the plurality of battery cells and facing the plurality of battery cells, and a through-hole penetrating the supporting portion at a location corresponding to the communication hole. In an embodiment, the curved portion may have a wavy shape. In an embodiment, the battery assembly may further comprise: a heat dissipation portion positioned between the curved portion and the plurality of battery cells. In an embodiment, the curved portion and the supporting portion may be provided with an insulation coating. In an embodiment, the curved portion may include a first body and a second body arranged with the plurality of battery cells therebetween, wherein the supporting portion may include a first bottom extending from one end of the first body toward the second body, a first recess in which a portion of one edge of the first bottom is recessed in a direction away from the second body, a second bottom extending from one end of the second body toward the first body, and a second recess in which a portion of one edge of the second bottom is recessed in a direction away from the first body at a location corresponding to the first recess, and wherein the first recess and the second recess may be connected to each other to form the through-hole when the first bottom and the second bottom are connected. In an embodiment, the first body, the first bottom, the second body, and the second bottom may be formed of the same material. In an embodiment, the first body, the first bottom, the second body, and the second bottom may be formed of different materials. In an embodiment, the curved portion may include the first