KR-102962885-B1 - Battery Module With Leakage Preventing Function of Potting Resin And Battery Pack with The Same

KR102962885B1KR 102962885 B1KR102962885 B1KR 102962885B1KR-102962885-B1

Abstract

The present invention relates to a battery module equipped with a leakage prevention function for a potting resin and a battery pack including the same. Specifically, the invention relates to a battery module and a battery pack including the same, comprising: a plurality of battery cells; an upper case for housing the upper portion of the battery cells, composed of a plurality of first side plates and a top plate connecting the upper portions of the first side plates; and a lower case for housing the lower portion of the battery cells, composed of a plurality of second side plates and a bottom plate connecting the lower portions of the second side plates, wherein the top plate of the upper case is provided with a plurality of through holes.

Inventors

전병준
배문준
손영수

Assignees

주식회사 엘지에너지솔루션

Dates

Publication Date: 20260511
Application Date: 20221013
Priority Date: 20211108

Claims (15)

Multiple battery cells; An upper case for housing the upper portion of the battery cell, comprising a plurality of first side plates and a top plate connecting the upper portions of the first side plates; and A lower case for housing the lower part of the battery cell, comprising a plurality of second side plates and a lower plate connecting the lower portions of the second side plates; The above top plate is provided with a plurality of through holes, and The above through hole includes a first through hole for wrapping the upper part of the battery cell and exposing one end to the outside, a second through hole for injecting potting resin, and a third through hole for discharging internal air between the upper case and the lower case when filling with potting resin. A battery module characterized by having a first space provided below the upper plate or a second space provided above the lower plate, into which the injected potting resin is filled.
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In paragraph 1, A battery module characterized in that the cross-sectional areas of the first through hole, the second through hole, and the third through hole are sequentially reduced.
In paragraph 1, A battery module characterized in that the first through hole comprises a first upper through hole smaller than the outer diameter of the battery cell and a first lower through hole larger than the outer diameter of the battery cell.
In paragraph 4, A battery module characterized by having a first sealing member protruding by a predetermined length at the lower end of the first side plate.
In paragraph 5, A battery module characterized in that the first sealing member is integrated with the upper case by double injection molding.
In paragraph 1, A battery module characterized by the fact that the lower plate is provided with a fourth through hole to surround the lower part of the battery cell while exposing the other end to the outside.
In Paragraph 7, A battery module characterized by having a second sealing member provided in a portion of the inner surface of the fourth through hole.
In paragraph 8, A battery module characterized in that the second sealing member is in close contact with the lower outer surface of the battery cell.
In Paragraph 9, A battery module characterized in that the second sealing member is integrated with the lower case by double injection molding.
In paragraph 8, A battery module characterized in that the second sealing member is positioned in a recessed shape on the inner surface of the fourth through hole.
In paragraph 5, A battery module characterized by having a groove portion in which the first sealing member is seated at the upper end of the second side plate.
In paragraph 1, A first sealing member protruding by a predetermined length is provided at the upper end of the second side plate, and A battery module characterized by having a groove portion in which the first sealing member is seated at the lower end of the first side plate.
A battery pack comprising a battery module described in any one of claims 1, 3 to 13.
A device equipped with a battery pack as described in paragraph 14.

Description

Battery Module With Leakage Preventing Function of Potting Resin and Battery Pack Including the Same The present invention relates to a battery module equipped with a leakage prevention function for a potting resin and a battery pack including the same. Specifically, the invention relates to a battery module equipped with a leakage prevention function for a potting resin and a battery pack including the same, which enables rapid injection without leakage outside the case during potting resin injection and simplifies the manufacturing process of the battery module. Recently, the demand for rechargeable batteries capable of storing generated electrical energy is increasing due to air pollution caused by the use of fossil fuels and the development of alternative energy sources resulting from energy depletion. Rechargeable rechargeable batteries are widely used in various fields, including mobile devices, electric vehicles, hybrid electric vehicles, and industrial robots. Rechargeable batteries, which serve as an indispensable energy source for various electronic devices in modern society, are seeing increased capacity requirements due to the growing usage and complexity of mobile devices and the development of electric vehicles. While multiple battery cells are arranged in small devices to meet user demand, vehicles utilize battery modules that electrically connect multiple battery cells, or battery packs equipped with multiple such modules. Meanwhile, the battery module typically has a structure in which multiple battery cells are housed inside a case that is separated into upper and lower sections; this protects the battery cells from external impacts while preventing moisture from penetrating or various foreign substances from entering. Meanwhile, the importance of safety is increasing due to issues such as fires occurring inside battery cells caused by external shocks like overheating or overcharging. Therefore, a technology is being developed to pot the area around the battery cell with liquid silicone to control thermal runaway and heat transfer phenomena that may occur during a chain reaction of ignition. However, if the viscosity of the potting resin is low, it may leak out through the gaps in the module case and cause other problems. FIG. 1 is a perspective view of a battery module according to a preferred embodiment of the present invention. FIG. 2 is a plan view of a battery module according to a preferred embodiment of the present invention. FIG. 3 is a bottom perspective view of a battery module according to a preferred embodiment of the present invention. Figure 4 is a perspective view cut along line AA of Figure 1. Figure 5 is a perspective view of Figure 4 with the battery cell not installed. FIG. 6 is an illustration illustrating the internal structure of an upper case in a battery module according to a preferred embodiment of the present invention. FIG. 7 is a perspective view showing a battery cell housed in a lower case in a battery module according to a preferred embodiment of the present invention. FIG. 8 is an illustration illustrating the internal structure of a lower case in a battery module according to a preferred embodiment of the present invention. Embodiments that enable a person skilled in the art to easily implement the present invention are described in detail below with reference to the attached drawings. However, in describing the operating principles of preferred embodiments of the present invention in detail, if it is determined that a detailed description of related known functions or configurations may unnecessarily obscure the essence of the present invention, such detailed description is omitted. In addition, the same reference numerals are used for parts having similar functions and operations throughout the drawings. Throughout the specification, when a part is described as being connected to another part, this includes not only cases where they are directly connected, but also cases where they are indirectly connected with other elements in between. Furthermore, unless specifically stated otherwise, the inclusion of a certain component does not exclude other components but implies that additional components may be included. Additionally, throughout the specification, the meanings of upper and lower can be understood as the concepts of lower and upper, or one side and the other side, respectively, depending on the installation direction. Hereinafter, a battery module equipped with a leakage prevention function of a potting resin according to the present invention and a battery pack including the same will be described with reference to the attached drawings. FIG. 1 is a perspective view of a battery module according to a preferred embodiment of the present invention, FIG. 2 is a top view of a battery module according to a preferred embodiment of the present invention, and FIG. 3 is a bottom perspective view of a battery module according to a preferred embodiment of th