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KR-102964262-B1 - Stick for blocking battery fire propagation and battery module having the same

KR102964262B1KR 102964262 B1KR102964262 B1KR 102964262B1KR-102964262-B1

Abstract

A battery fire propagation blocking stick and a battery module equipped with the same are disclosed. A battery fire propagation blocking stick according to one aspect of the present invention may include: an outer shell made of a synthetic resin material forming an internal receiving space; heat-blocking beads received within the receiving space formed by the outer shell and blocking the transfer of heat generated during a fire; and fire extinguishing material beads received mixed with the heat-blocking beads within the receiving space formed by the outer shell and extinguishing the fire.

Inventors

  • 배진호
  • 장승순

Assignees

  • 주식회사 네패스야하드

Dates

Publication Date
20260513
Application Date
20240408
Priority Date
20231123

Claims (8)

  1. An outer shell made of synthetic resin material that forms an internal receiving space and is positioned between the lead tabs of a pouch-type battery cell; A heat-blocking bead housed within a housing space formed by the above outer shell and blocking heat generated in the event of a fire from being transferred to an adjacent battery cell; Fire extinguishing agent beads that are mixed with and accommodated with the heat-blocking beads inside the receiving space formed by the above outer shell; Includes, The above heat-blocking beads are, A battery fire propagation blocking stick that melts due to heat applied during a battery fire and fuses together with the outer shell to form a structure that supports the shape.
  2. delete
  3. In paragraph 1, The above fire extinguishing beads are, A battery fire propagation blocking stick consisting of beads containing fire extinguishing material.
  4. In paragraph 1, A stick for blocking battery fire propagation, wherein the outer shell has a longitudinal direction in one direction, both ends are closed, and the stick is formed in a stick shape having an internal receiving space.
  5. In paragraph 1, A stick for blocking battery fire propagation, wherein the outer shell comprises polypropylene material and the heat-blocking beads comprise silica material.
  6. In paragraph 1, A battery fire propagation blocking stick in which heat-blocking beads and fire-extinguishing material beads are mixed and contained within the above-mentioned receiving space in a weight ratio of 6:3 to 8:5.
  7. Multiple pouch-type battery cells; A casing accommodating the above plurality of battery cells; A battery fire propagation blocking stick according to any one of claims 1 and 3 to 6, disposed between the above battery cells; A battery module equipped with a stick for blocking battery fire propagation, including
  8. In Paragraph 7, The above battery cell is, electrode; A pouch comprising a pocket for accommodating the electrode and electrolyte, a first outer layer forming a first surface of the pocket and a second outer layer forming a second surface of the pocket, wherein the first outer layer and the second outer layer are integrally formed and overlap each other while folded to form a sealing portion joined together at the outer edge of the pocket; A lead tab extending from the electrode to the outside of the pouch; Includes, The sealing portion comprises a pair of short sides on the side where the lead tab is located and a pair of long sides that are orthogonal to the short sides and longer than the short sides. The above battery fire propagation blocking stick is, A battery module having a battery fire propagation blocking stick disposed between lead tabs or between long sides of the plurality of battery cells so as to have a length direction the same as the length direction of the short side of the pouch-shaped battery cell.

Description

Stick for blocking battery fire propagation and battery module including the same The present invention relates to a stick for blocking the propagation of a battery fire and a battery module including the same, and more specifically, to a stick for blocking, delaying, or extinguishing the propagation of a fire in a pouch-type battery cell when a fire occurs, and a battery module including the same. Recently, due to environmental issues, the development of electric vehicles to replace conventional internal combustion engines is accelerating. In addition, with the advancement of various IT devices, the development of portable electronic devices such as laptops, mobile phones, and watches is also accelerating. These electric vehicles and portable electronic devices all use electricity as a power source, and batteries, including secondary batteries, can be cited as a representative power source for electrical energy. These rechargeable secondary batteries are a key component of electric vehicles and portable electronic devices. These secondary batteries can be seen as comprising battery cells, battery modules in which the battery cells are assembled, and battery packs in which the battery modules are assembled, but there is a risk of fire occurring due to various reasons such as short circuits, overcharging, or over-discharging between the battery cells and battery modules. Generally, a battery consists of electrodes and an outer casing surrounding the electrodes. It is reported that when a fire occurs, the internal electrolyte leaks from the outer casing, and combustion begins in the leaked electrolyte. In particular, since secondary battery fires are difficult to start due to their characteristics, early extinguishing is crucial, and it is also important to delay the spread of fire to secure evacuation time when it first occurs. Furthermore, in the case of electric vehicles, devices or structures for initial fire suppression or fire propagation delay must be equipped or formed within the vehicle's structure; however, this leads to a problem where the vehicle's interior becomes cramped or the space inside the battery pack is reduced, resulting in a decrease in battery capacity. In the case of small portable electronic devices, there is no space within the device to install devices for initial fire suppression or fire propagation delay in the event of a fire, so a solution to this problem is currently required. Figure 1 is a drawing illustrating a typical pouch-type battery cell. Figure 2 is a plan view and a cross-sectional view of the pouch-type battery cell of Figure 1. FIG. 3 is a drawing showing the battery fire propagation blocking stick of the present invention positioned between the short sides of a pouch-type battery cell. FIG. 4 is a drawing showing the battery fire propagation blocking stick of the present invention positioned between the long sides of a pouch-type battery cell. FIG. 5 is a diagram illustrating how a battery fire propagation blocking stick positioned between pouch-type battery cells deforms to block heat during a fire, where (a) is the state before a fire occurs and (b) is the state after a fire occurs and the battery fire propagation blocking stick is deformed. Hereinafter, embodiments of the present invention are described in detail with reference to the attached drawings so that those skilled in the art can easily implement the invention. The present invention may be embodied in various different forms and is not limited to the embodiments described herein. To clearly explain the present invention, parts unrelated to the description in the drawings have been omitted, and the same reference numerals have been used throughout the specification for identical or similar components. The words and terms used in this specification and claims are not limited to their ordinary or dictionary meanings, but should be interpreted in a meaning and concept consistent with the technical spirit of the invention in accordance with the principles by which the inventor defines terms and concepts to best describe his invention. Therefore, the embodiments described in this specification and the configurations illustrated in the drawings correspond to preferred embodiments of the present invention and do not represent all technical concepts of the present invention; thus, various equivalents and modifications that may replace such configurations may exist at the time of filing the present invention. In this specification, terms such as “comprising” or “having” are intended to describe the existence of the features, numbers, steps, actions, components, parts, or combinations thereof described in the specification, and should not be understood as precluding the existence or addition of one or more other features, numbers, steps, actions, components, parts, or combinations thereof. The statement that a component is "in front," "rear," "upper," or "lower" of another component includes, unless there are spec