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KR-102963835-B1 - BATTERY MODULE AND BATTERY PACK INCLUDING THE SAME

KR102963835B1KR 102963835 B1KR102963835 B1KR 102963835B1KR-102963835-B1

Abstract

A battery module according to one embodiment of the present invention comprises: a battery cell stack having a plurality of battery cells stacked thereon; a module frame accommodating the battery cell stack; and an end plate covering the front and rear surfaces of the battery cell stack, wherein a drainage channel is formed at the lower corner portions on both sides of the end plate that meets the module frame.

Inventors

  • 전현욱

Assignees

  • 주식회사 엘지에너지솔루션

Dates

Publication Date
20260511
Application Date
20200922

Claims (10)

  1. A battery cell stack having multiple battery cells stacked thereon; A module frame accommodating the above battery cell stack; and It includes end plates covering the front and rear surfaces of the above-mentioned battery cell stack, and A drainage channel is formed at the lower corners on both sides of the end plate that meet the module frame, and A rim portion is formed on the edge of the above end plate, protruding toward the module frame, and The above drainage channel is a battery module formed on the above rim.
  2. In paragraph 1, A battery module in which the end plate and the module frame meet, excluding the portion where the drainage channel is formed, are joined by welding.
  3. In paragraph 1, A battery module in which the drainage channel is formed to have a first slope toward the lower outer corner portion of the end plate, and the inner lower portion of the end plate connected to the drainage channel is formed to have a second slope toward the drainage channel.
  4. In Paragraph 3, The above first slope is a battery module in which the angle of inclination is greater than the above second slope.
  5. In paragraph 1, The above drainage channel is a battery module formed from the lower inner corner portion of the end plate toward the lower outer corner portion.
  6. delete
  7. In paragraph 1, An insulating cover is formed between the above battery cell stack and the above end plate, and The inner lower portion of the above end plate is a battery module formed on the lower side of the insulation cover.
  8. In paragraph 1, A busbar frame is formed on the front and rear surfaces of the above-mentioned battery cell stack, and The above busbar frame is a battery module connected to the upper space of the inner lower part of the end plate.
  9. In paragraph 8, A plurality of busbars are mounted on the outer surface of the busbar frame, and the plurality of busbars are connected to the upper space of the inner lower portion of the battery module.
  10. Battery module according to claim 1; and A battery pack including a drainage device connected to the drainage channel of the battery module.

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 for preventing short circuits between busbars and a battery pack including the same. Rechargeable batteries are attracting significant attention as an energy source for various product categories, including mobile devices and electric vehicles. As a promising energy resource capable of replacing conventional products that use fossil fuels, these batteries are gaining prominence as an eco-friendly energy source because they do not generate byproducts during use. Recently, with the increasing need for high-capacity secondary battery structures, including their utilization as energy storage sources, there is a growing demand for battery packs with a multi-module structure that aggregates battery modules in which multiple secondary batteries are connected in series or parallel. Meanwhile, when configuring a battery pack by connecting multiple battery cells in series or parallel, it is common practice to configure a battery module consisting of at least one battery cell and to configure the battery pack by adding other components using this at least one battery module. This battery module includes a battery cell stack in which a plurality of battery cells are stacked, a module frame that accommodates the battery cell stack, and end plates that cover the front and rear surfaces of the battery cell stack. FIG. 1 is a perspective view showing the bottom portion of a conventional battery module. FIG. 2 is an enlarged view of portion A of FIG. 1. FIG. 3 is a view looking at the inner surface of an end plate. Referring to FIGS. 1 to 3, a conventional battery module may include a module frame (20) that accommodates a battery cell stack and an end plate (30) that covers the front and rear surfaces of the battery cell stack. At this time, as shown in FIG. 3, it can be seen that there is no separate moisture drainage structure in the end plate. If there is no moisture drainage structure in the battery module, moisture may flow into the battery module from the outside. In addition, water vapor flowing into the battery module may condense to generate condensate. Furthermore, electrolyte may leak from the battery cells and the leaked electrolyte may settle inside the module frame. If liquid is generated inside the battery module in this manner, the busbars connected to the battery cells may be submerged by the liquid. As the submerged busbars corrode, a short circuit may occur between them. If a short circuit occurs, it can lead to a fire and degrade the performance of the battery module. FIG. 1 is a perspective view showing the bottom portion of a conventional battery module. Figure 2 is an enlarged view of part A of Figure 1. Figure 3 is a view of the inner side of the end plate. FIG. 4 is a perspective view showing the bottom portion of a battery module according to one embodiment of the present invention. Figure 5 is a drawing showing the parts inserted inside the module frame of Figure 4. Figure 6 is an enlarged view of part B of Figure 4. FIG. 7 is a plan view showing the inner surface of an end plate according to one embodiment of the present invention. FIG. 8 is a perspective view showing the inner surface of an end plate according to one embodiment of the present invention. The embodiments described below are presented as examples to aid in understanding the invention, and it should be understood that the invention may be implemented with various modifications different from the embodiments described herein. However, in describing the invention, detailed descriptions and specific illustrations of related known functions or components are omitted if it is determined that such detailed descriptions or specific illustrations might unnecessarily obscure the essence of the invention. Furthermore, the attached drawings are not drawn to actual scale to aid in understanding the invention, and the dimensions of some components may be exaggerated. The first and second terms used in this application may be used to describe various components, but the components should not be limited by the terms. The terms are used solely for the purpose of distinguishing one component from another. Furthermore, the terms used in this application are used merely to describe specific embodiments and are not intended to limit the scope of the rights. The singular expression includes the plural expression unless the context clearly indicates otherwise. In this application, terms such as “comprising,” “consisting of,” or “consisting of” are intended to specify the existence of the features, numbers, steps, actions, components, parts, or combinations thereof described in the specification, and should be understood as not precluding the existence or addition of one or more other features, numbers, steps, actions, components, parts, or combinations thereof. Hereinafter,