KR-20260066485-A - Battery module and battery pack including the same

KR20260066485AKR 20260066485 AKR20260066485 AKR 20260066485AKR-20260066485-A

Abstract

A battery module according to the present invention is characterized by comprising: a battery cell stack in which a plurality of battery cells are stacked; a module case for accommodating the battery cell stack; a busbar frame disposed on one side of the battery cell stack; and a plurality of heat-blocking blocks disposed on one surface of the busbar frame facing the battery cells. The battery module and pack according to the present invention have the effect of blocking or delaying the transfer of heat and particles to the busbar during thermal runaway and preventing short circuits in the busbar.

Inventors

황상일
김세호
신기성
이동우

Assignees

주식회사 엘지에너지솔루션

Dates

Publication Date: 20260512
Application Date: 20241104

Claims (12)

A battery cell stack in which multiple battery cells are stacked; A module case for accommodating the above battery cell stack; A busbar frame disposed on one side of the above-mentioned battery cell stack; and A plurality of heat-blocking blocks disposed on one side facing the battery cell in the above busbar frame; A battery module characterized by including
In paragraph 1, The above heat-blocking block is a battery module attached to the inner side of the busbar frame.
In paragraph 1, The above thermal insulation block is a battery module made of a foam block.
In paragraph 1, The above-mentioned heat-blocking block is a battery module made of silicon.
In paragraph 1, A plurality of the above-mentioned heat-blocking blocks are spaced apart along the width direction of the battery module.
In paragraph 1, The above thermal block is a battery module placed between the electrode leads of two adjacent battery cells.
In paragraph 6, The end of the above-mentioned heat-blocking block is a battery module positioned between the cell terraces of two adjacent battery cells.
In paragraph 1, The above heat-blocking block is a battery module extending vertically from the inside of the busbar frame.
In paragraph 1, The above busbar frame is positioned on both sides of the battery cell stack, and A plurality of the above-mentioned heat-blocking blocks are battery modules each disposed on the busbar frames disposed on both sides of the battery cell stack.
In paragraph 1, A battery module further comprising a plurality of busbars disposed on the above-mentioned busbar frame.
In paragraph 1, A battery module comprising one or more heat-insulating pads placed between two adjacent battery cells.
A battery pack comprising a plurality of battery modules according to claim 1.

Description

Battery module and battery pack including the same The present invention relates to a battery module and a battery pack including the same, and more specifically, to a battery module that delays thermal transfer during thermal runaway and a battery pack including the same. Unlike primary batteries, which cannot be recharged, secondary batteries refer to batteries capable of charging and discharging, and are applied not only to portable devices but also to electric vehicles (EVs) and hybrid electric vehicles (HEVs) driven by electric power sources. Currently, widely used types of secondary batteries include lithium-ion batteries, lithium-polymer batteries, nickel-cadmium batteries, nickel-hydrogen batteries, and nickel-zinc batteries. The operating voltage of these unit secondary battery cells, or unit battery cells, is approximately 2.5V to 4.6V. Therefore, if a higher output voltage is required, a battery pack is formed by connecting multiple battery cells in series. Additionally, a battery pack is formed by connecting multiple battery cells in parallel depending on the charge/discharge capacity required for the battery pack. Accordingly, the number of battery cells included in the battery pack can be varied depending on the required output voltage or charge/discharge capacity. When configuring a battery pack by connecting multiple battery cells in series or parallel, it is common practice to first configure a battery module consisting of at least one battery cell, preferably multiple battery cells, and then use at least one such battery module to configure the battery pack by adding other components. Here, a battery module refers to a component in which multiple battery cells are connected in series or parallel, and a battery pack refers to a component in which multiple battery modules are connected in series or parallel to increase capacity and output. In the event of thermal runaway in a battery module, heat transfer from one cell to an adjacent cell may occur, and heat and particles may be transferred from the cell to the busbar frame to which the electrode leads are connected. This can cause the busbar frame to melt and lead to a short circuit in the busbar. FIG. 1 is a perspective view of a battery module according to an embodiment of the present invention, and FIG. 2 is an exploded perspective view of a battery module according to an embodiment of the present invention, and FIG. 3 is a perspective view of a battery cell in one embodiment of the present invention, and FIG. 4 is a perspective view of a terminal busbar in one embodiment of the present invention, and FIG. 5 is a perspective view of an insulating cover and an end plate in one embodiment of the present invention, and FIG. 6 is a perspective view of a busbar frame, and FIG. 7 is a drawing showing busbar frames coupled to both sides of a battery cell stack in one embodiment of the present invention, and FIG. 8 is a bottom view of FIG. 7, and FIG. 9 is a partial detailed view of FIG. 8, and FIG. 10 is a plan view of a busbar frame in one embodiment of the present invention, and FIG. 11 is a drawing illustrating a battery pack in an embodiment of the present invention, and FIG. 12 is a drawing illustrating a vehicle equipped with a battery pack in one embodiment of the present invention. 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 of the present invention is complete and to fully inform those skilled in the art of the scope of the invention, and the present invention is defined only by the scope of the claims. Accordingly, in some embodiments, well-known process steps, well-known device structures, and well-known techniques are not specifically described to avoid the present invention being interpreted ambiguously. Throughout the specification, like reference numerals refer to like components. In drawings, thicknesses may be enlarged to clearly represent multiple layers and regions. Throughout the specification, the same reference numerals are used for similar parts. When a part such as a layer, film, region, or plate is described as being "above" another part, this includes not only cases where it is "immediately above" another part, but also cases where there is another part in between. Conversely, when a part is described as being "immediately above" another part, it means that there is no other part in between. Furthermore, when a part such as a layer, film, region, or plate is described as being "below" another part, this includes not only cases where it is "immediately below" another part, but also cases where there is another part in between. Conversely, when a part is described as