KR-20260064286-A - A Fire-retardant Assembly For A Battery, The Manufacturing Method Of The Same And A Battery Assembly Including The Fire-retardant Assembly

Abstract

The present disclosure relates to a fire-resistant assembly comprising a fire-resistant member comprising a fire-resistant material and a column-shaped exterior material that accommodates the fire-resistant member inside, and a method for manufacturing the same. Additionally, the present disclosure relates to a battery assembly comprising the fire-resistant assembly disposed between a plurality of battery cells and a receiving case that accommodates the same.

Inventors

• 신희준
• 홍총표

Assignees

• 에스케이온 주식회사

Dates

Publication Date

20260507

Application Date

20241031

Claims (19)

1. Multiple battery cells; A receiving case accommodating the above plurality of battery cells; An insertion space formed between the plurality of battery cells and the receiving case; and A fire-resistant assembly disposed in the above insertion space; comprising, The above fire-resistant assembly A fire-resistant member comprising a fire-resistant material; and A battery assembly comprising an exterior material formed of a heat-shrinkable material that accommodates the above-mentioned fire-resistant member inside.
2. In paragraph 1, The above exterior material is A body portion extending along the height direction of the receiving case, with at least one of the two ends open; and A first cap coupled to the body portion and covering at least one end; The above body part A battery assembly whose volume decreases upon heating.
3. In paragraph 1, The above exterior material is A body portion having both ends open and extending along the height direction of the receiving case; A first cap coupled to the body part and covering one end of the body part; and A second cap coupled to the body part and covering the other end of the body part; comprising The above body part A battery assembly whose volume decreases upon heating.
4. In paragraph 1, The above exterior material is It includes a body portion that is open at both ends and extends along the height direction of the receiving case, and By heating the areas adjacent to both ends of the above body part A battery assembly in which the perimeters of each end of the above-mentioned body part are joined together.
5. In paragraph 1, The above exterior material is It starts to melt when it reaches the preset temperature, and The above temperature is A battery assembly with a melting point lower than that of the above-mentioned refractory material.
6. In paragraph 1, The above fire-resistant member is A battery assembly containing silicon dioxide ( SiO2 ).
7. In paragraph 1, The above fire-resistant member is A battery assembly characterized by including a plurality of refractory particles.
8. In paragraph 1, The above fire-resistant member is A battery assembly including air gaps between the plurality of refractory particles.
9. In paragraph 1, The above fire-resistant member is A battery assembly that is a solid filler.
10. In Paragraph 9, The form of the above solid filler is A battery assembly consisting of multiple granular materials.
11. A fire-resistant member comprising a fire-resistant material; and A fire-resistant assembly for a battery comprising an outer material formed of a heat-shrinkable material that accommodates the fire-resistant member inside.
12. In Paragraph 11, The above exterior material is A body portion having at least one of the two ends facing each other opened; and It includes a first cap coupled to the body portion and covering at least one end; The above body part A refractory assembly for batteries that shrinks in volume upon heating.
13. In Paragraph 11, The above exterior material is A body part in which at least one of the two ends facing each other is opened; A first cap coupled to the body part and covering one end of the body part; and A second cap coupled to the body part and covering one end of the body part; comprising The above body part A refractory assembly for batteries that shrinks in volume upon heating.
14. In Paragraph 11, The above exterior material is It includes a body portion that is open at both ends and extends along the height direction of the receiving case, and A fire-resistant assembly for a battery in which the perimeters of each end of the body part are joined by heating the areas adjacent to both ends of the body part.
15. A method for manufacturing a fire-resistant assembly for a battery, comprising: a fire-resistant member including a fire-resistant material; and an exterior material including a body portion having both ends open and formed of a heat-shrinkable material, which accommodates the fire-resistant member inside. A step of closing one of the two open ends of the above body part; Step of inserting the above refractory member; A step of closing the other end of the above body part; and A method for manufacturing a refractory assembly for a battery, comprising the step of heating the body portion to shrink the body portion.
16. In paragraph 15, The step of closing one of the two open ends of the above body part A method for manufacturing a fire-resistant assembly for a battery, wherein a first disc-shaped cap is attached to one end of the above-mentioned body part.
17. In Paragraph 16, The step of closing the other end of the body part above A method for manufacturing a fire-resistant assembly for a battery, wherein a disc-shaped second cap is attached to the other end of the body part.
18. In paragraph 15, The step of closing one of the two open ends of the above body part A method for manufacturing a refractory assembly for a battery, wherein a region adjacent to one end of the body part is heated to join the perimeters of one end of the body part together and close one end of the body part.
19. In Paragraph 18, The step of closing the other end of the body part above A method for manufacturing a fire-resistant assembly for a battery, wherein a region adjacent to the other end of the body part is heated to join the perimeters of the other end of the body part together and close the other end of the body part.

Description

A fire-retardant assembly for a battery, the manufacturing method thereof, and a battery assembly including the fire-retardant assembly The present disclosure relates to a fire-resistant assembly for a battery inserted into a battery assembly, a method for manufacturing the same, and a battery assembly comprising said fire-resistant assembly. Specifically, it relates to a fire-resistant assembly for a battery that improves the production efficiency of a battery assembly, a method for manufacturing the same, and a battery assembly comprising said fire-resistant assembly. Social concerns regarding the safety of battery usage are rising due to recent fires and explosions involving lithium-ion batteries. Based on these concerns, one of the key development challenges for lithium-ion batteries is to eliminate instability, such as fires and explosions caused by thermal runaway in battery cells. In particular, battery modules and packs contain empty spaces other than the battery cells that serve as the energy source. If a fire occurs due to external impact or a problem with a battery cell, flames can spread to adjacent cells through these empty spaces, potentially exacerbating the damage. As this risk of fire can be a major obstacle to the electric vehicle market, continuous research is being conducted to devise methods to reduce fire propagation. FIG. 1 is an example of a battery assembly according to the present disclosure. FIG. 2 is an example of a disassembled battery assembly according to the present disclosure. FIG. 3 is a top view of a battery assembly according to the present disclosure. FIG. 4 is a cross-sectional view taken from above of an example of a battery assembly according to the present disclosure. FIG. 5 is an example of a battery assembly according to the present disclosure viewed from one side. FIG. 6 is a view of another example of a battery assembly according to the present disclosure from one side. FIG. 7 illustrates a cross-section of a fire-resistant assembly according to the present disclosure. FIG. 8 illustrates an example of a method for manufacturing a fire-resistant assembly according to the present disclosure. FIG. 9 illustrates another example of a method for manufacturing a fire-resistant assembly according to the present disclosure. FIG. 10 is a flowchart illustrating a method for manufacturing a fire-resistant assembly according to the present disclosure. Preferred embodiments of the present disclosure will be described in detail below with reference to the attached drawings. The battery assembly (200) according to the present disclosure is a general concept encompassing a battery module, a battery pack, or an energy storage system (ESS). Accordingly, the battery assembly (200) according to the present disclosure may refer not only to a battery module but also to a battery pack or energy storage system (ESS) that accommodates battery cells without a battery assembly, such as a Cell to Pack (hereinafter CTP). In the present disclosure, the term "for batteries" may mean used for a battery assembly such as a battery module, battery pack, or energy storage device. Even if described simply as a fire-resistant assembly in the present disclosure, the fire-resistant assembly may mean a battery in the context. FIG. 1 is an example of a battery assembly according to the present disclosure. Referring to FIG. 1, the battery assembly (200) may include a plurality of battery cells (110), a busbar assembly (130) that electrically connects and supports the plurality of battery cells (110), and a receiving case (210) that accommodates the plurality of battery cells (110). Meanwhile, each of the plurality of battery cells (110) may include a main body (115) for producing or storing electrical energy, and lead tabs (111, 112) protruding from the main body (115) to the outside of the main body (115). The main body (115) may include an electrode assembly (not shown) containing a positive electrode and a negative electrode inside for producing and storing electrical energy. Additionally, the main body (115) further includes an electrolyte (not shown) in contact with the electrode assembly. The electrolyte may be a liquid or a solid. Additionally, if the electrolyte is a liquid, the electrode assembly may further include a separator for separating the positive electrode and the negative electrode. Referring to FIG. 1, the main body (115) may be in the form of a pouch sealed with a film-type outer material. FIG. 1 illustrates an example of a pouch-type battery cell (110), but is not limited thereto. Accordingly, the battery assembly (200) and fire-resistant assembly (270) according to the present disclosure can also be applied to prismatic and cylindrical battery cells. Specifically, the lead tab portions (111, 112) may include a first lead tab portion (111) and a second lead tab portion (112) that protrude from both sides of the main body portion (115) in a direction away from the main body portion (11