KR-20260064217-A - Heat propagation preventing member manufacturing apparatus and heat propagation preventing member manufacturing method

KR20260064217AKR 20260064217 AKR20260064217 AKR 20260064217AKR-20260064217-A

Abstract

The present disclosure relates to a thermal propagation prevention member manufacturing apparatus for manufacturing a thermal propagation prevention member provided inside a battery assembly that accommodates a battery cell, comprising: a mold part including a receiving part having a predetermined volume inside; a transfer part for positioning an outer material of the thermal propagation prevention member in the receiving part; an air injection part for injecting air into the outer material through an opening formed in the outer material; and a filling part for injecting a refractory material into the outer material through the opening.

Inventors

배철진
노윤주
이강우
황원갑

Assignees

에스케이온 주식회사

Dates

Publication Date: 20260507
Application Date: 20241031

Claims (9)

In a thermal propagation prevention member manufacturing apparatus for manufacturing a thermal propagation prevention member provided inside a battery assembly that accommodates a battery cell, A mold portion including a receiving portion of a predetermined volume inside; A transfer unit for positioning the outer material of the heat propagation prevention member in the above receiving unit; An air injection unit for injecting air into the interior of the exterior material through an opening formed in the exterior material; and A heat propagation prevention device comprising: a filling part for injecting a fire-resistant material into the exterior material through the opening.
In paragraph 1, The above exterior material is a heat propagation prevention member manufacturing device that expands by the injection of the above air.
In paragraph 1, A heat propagation prevention device in which the melting point of the above refractory material is higher than the melting point of the above exterior material.
In paragraph 1, The above air injection unit is a heat propagation prevention member manufacturing device that injects air until the outer surface of the exterior material contacts the receiving unit.
In paragraph 1, A heat propagation prevention member manufacturing device further comprising: a cover fixing part for positioning a cover part at an opening of the exterior material.
A method for manufacturing a heat propagation prevention member, wherein the heat propagation prevention member is provided inside the module housing of a battery assembly comprising a battery cell and a module housing that accommodates the battery cell. A step of positioning an exterior material in a mold portion including a receiving portion having a predetermined volume inside; Step of injecting air into the above exterior material; and A method for manufacturing a heat propagation prevention member comprising the step of injecting a fire-resistant material into the exterior material.
In paragraph 6, The step of injecting air into the above exterior material is a method for manufacturing a heat propagation prevention member in which the exterior material expands by the injection of air.
In Paragraph 7, A method for manufacturing a heat propagation prevention member, wherein the step of injecting air into the above-mentioned exterior material involves injecting air until the outer surface of the above-mentioned exterior material comes into contact with the receiving portion.
In paragraph 6, A method for manufacturing a heat propagation prevention member, further comprising the step of sealing the above exterior material.

Description

Heat propagation preventing member manufacturing apparatus and heat propagation preventing member manufacturing method The present disclosure relates to an apparatus for manufacturing a heat propagation prevention member and a method for manufacturing a heat propagation prevention member. Rechargeable batteries are batteries designed to convert electrical energy into chemical energy for storage, enabling them to be reused multiple times through charging and discharging. Due to their economical and eco-friendly characteristics, rechargeable batteries are widely used across various industries. In particular, lithium secondary batteries are widely utilized in industries across the board, including portable devices that require high energy density. The operating principle of a lithium-ion battery is an electrochemical oxidation-reduction reaction. In other words, it is a principle in which electricity is generated through the movement of lithium ions, and charging occurs through the reverse process. In the case of a lithium-ion battery, the phenomenon in which lithium ions from the anode move to the cathode through the electrolyte and separator is called discharge. The reverse process of this phenomenon is called charging. Rechargeable batteries can generate a significant amount of heat during the charging and discharging processes. If the internal heat is not quickly suppressed, the fire can spread to adjacent battery cells, causing significant damage. Therefore, one of the key challenges is to rapidly extinguish the heat generated within the rechargeable battery and prevent the spread of fire. One method to delay and prevent heat propagation is to block the heat propagation path. However, due to the diverse shapes of secondary batteries and the housings housing them, it is difficult to block the heat propagation path inside the housing. FIG. 1 illustrates an embodiment of a battery assembly in which a heat propagation prevention member may be located. FIGS. 2 to 4 illustrate the use of a heat propagation prevention member manufacturing apparatus according to one embodiment of the present disclosure. FIG. 5 illustrates a heat propagation prevention member manufacturing apparatus according to another embodiment of the present disclosure. FIG. 6 illustrates the sequence of a method for manufacturing a heat propagation prevention member according to one embodiment of the present disclosure. Hereinafter, the present disclosure will be described in detail with reference to the attached drawings. However, this is merely illustrative and the present disclosure is not limited to the specific embodiments described illustratively. Specific terms used in this specification are for convenience of explanation only and are not intended to limit the exemplified embodiments. For example, expressions such as "identical" and "to be identical" indicate not only a strictly identical state, but also a state where tolerances or differences exist in the degree to which the same function is obtained. For example, expressions indicating relative or absolute arrangements, such as "in a certain direction," "along a certain direction," "parallel," "perpendicular," "to the center," "concentric," or "coaxial," not only strictly represent such arrangements but also indicate a state of relative displacement with respect to tolerances or angles or distances to which the same function is obtained. To explain the present disclosure, the following description is based on a spatial orthogonal coordinate system formed by mutually orthogonal X-axis, Y-axis, and Z-axis. Each axis direction (X-axis direction, Y-axis direction, Z-axis direction) refers to the two directions in which each axis extends. The X, Y, and Z directions mentioned below are for the purpose of explanation to ensure a clear understanding of the present disclosure, and it goes without saying that each direction may be defined differently depending on where the reference is placed. The use of terms such as ‘first, second, third’ preceding the components mentioned below is intended solely to avoid confusion regarding the components being referred to, and is unrelated to the order, importance, or master-subordinate relationship between the components. For example, an invention including only the second component without the first component can also be implemented. The terms used in this disclosure are for the description of specific embodiments and are not intended to limit the claims. As used in the description of embodiments and in the appended claims, the singular form is intended to include the plural form unless the context clearly indicates otherwise. FIG. 1 illustrates an embodiment of a battery assembly (200) in which a heat propagation prevention member may be located. The battery assembly (200) may include a battery cell (210) and a module housing (220) that accommodates the battery cell (210). The battery cell (210) may refer to a secondary battery that can be used repeate