WO-2026092826-A1 - BATTERY MODULE, METHOD OF MANUFACTURING THE SAME AND CURABLE RESIN COMPOSITION INCLUDED IN BATTERY MODULE

Abstract

Provided is a battery module, including: a plurality of battery cells; a case for containing the battery cells; and a buffer part disposed between the battery cells in the case, wherein the buffer part includes: a silicone-based resin matrix disposed between the battery cells in the case; hollow microspheres inserted into the silicone-based resin matrix; and an inorganic heat-resistant layer disposed around the hollow microspheres.

Inventors

• KIM, Hanee
• KANG, DooJin

Assignees

• WACKER CHEMIE AG

Dates

Publication Date

20260507

Application Date

20241028

Claims (20)

1. [CLAIMS]
2. [Claim 1]
3. A battery module, comprising:
4. a plurality of battery cells;
5. a case for containing the battery cells; and
6. a buffer part disposed between the battery cells in the case,
7. wherein the buffer part comprises:
8. a silicone-based resin matrix disposed between the battery cells in the case;
9. hollow microspheres inserted into the silicone-based resin matrix; and
10. an inorganic heat-resistant layer disposed around the hollow microspheres.
11. [Claim 2]
12. The battery module according to claim 1, wherein the inorganic heat-resistant layer comprises inorganic particles arranged adjacent to an outer surface of the hollow microspheres, wherein a ratio of a particle diameter of the hollow microspheres to a particle diameter of the inorganic particles is 30:1 to 30000:1.
13. [Claim 3]
14. The battery module according to claim 2, wherein the hollow microspheres comprise an organic resin, wherein the inorganic particles comprise an inorganic material selected from the group consisting of calcium carbonate, silica, calcium sulfate, barium sulfate, talc, talc powder, bentonite, kaolin, chalk powder, graphite, gypsum, electrically conductive carbon black, calcium chloride, iron oxide, aluminum oxide, potassium oxide, dolomite, wollastonite, titanium dioxide, silicate, and mica.
15. [Claim 4] The battery module according to claim 2, comprising a surface treatment agent coated around the inorganic particles, and
16. the inorganic particles are attached to the outer surface of the hollow microspheres.
17. [Claim 5]
18. The battery module according to claim 4, wherein the surface treatment agent comprises a fatty acid or a silane-based coupling agent.
19. [Claim 6]
20. A curable resin composition for manufacturing a battery module, the curable resin composition comprises:

Description

[DESCRIPTION] [Invention Title] BATTERY MODULE, METHOD OF MANUFACTURING THE SAME AND CURABLE RESIN COMPOSITION INCLUDED IN BATTERY MODULE [Technical Field] Embodiments relate to a battery module, a method of manufacturing the same and a curable resin composition included in the battery module. [Background Art] Secondary batteries that can be easily applied according to product groups and have electrical characteristics such as high energy density are universally applied to not only portable devices, but also electric vehicles (EVs) or hybrid vehicles (HEVs) driven by electric driving sources, etc. These secondary batteries are attracting attention as a new energy source for improving eco-friendliness and energy efficiency in that they do not generate any by-products due to the use of energy as well as the primary advantage of being dramatically able to reduce the use of fossil fuels. Examples of the types of secondary batteries currently widely used include a lithium-ion battery, a lithium polymer battery, a nickel -cadmium battery, a nickel hydride battery, a nickelzinc battery, and the like. The operating voltage of these unit secondary battery cells, i.e., unit battery cells, is about 2.5 V to 4.5 V. Accordingly, when a higher output voltage is required, a plurality of battery cells are connected in series to constitute a battery pack. In addition, a plurality of battery cells may be connected in parallel to constitute a battery pack according to the charge/discharge capacity required for the battery pack. Accordingly, the number of battery cells included in the battery pack may be set in various ways according to a required output voltage or charge/discharge capacity. Meanwhile, when configuring a battery pack by connecting a plurality of battery cells in series/parallel, it is general that a battery module including at least one battery cell is first configured, and other components are added using the battery module. Existing battery modules including battery cells that are composed of cylindrical cells generally include a plurality of cylindrical cells stacked on each other, a bus bar electrically connecting the plural cylindrical cells to each other, and a module case for accommodating various electronic components constituting the bus bar, the cylindrical cells and the battery module. However, in the case of the existing battery modules, a predetermined gap between the cells is generated depending on the structural shape of the cylindrical cells, and the flow between the battery cells is frequently made when an external shock occurs, so that there is a risk of damage, etc. to the battery cells. Therefore, there is a need for methods for providing a battery module capable of more stably supporting battery cells and of preventing damage to battery cells due to external impact, and providing a battery pack and vehicle including the battery module. [Disclosure] [Technical Problem] Therefore, the present invention has been made in view of the above problems, and it is one object of the present invention to provide a battery module that has an improved production rate and can efficiently protect battery cells; a method of manufacturing the battery module; and a curable resin composition included in the battery module. [Technical Solution] In accordance with an aspect of the present invention, the above and other objects can be accomplished by the provision of a battery module, including: a plurality of battery cells; a case for containing the battery cells; and a buffer part disposed between the battery cells in the case, wherein the buffer part includes: a silicone-based resin matrix disposed between the battery cells in the case; hollow microspheres inserted into the silicone-based resin matrix; and an inorganic heat-resistant layer disposed around the hollow microspheres. In the battery module according to the embodiment, the inorganic heat-resistant layer may include inorganic particles arranged adjacent to an outer surface of the hollow microspheres, wherein a ratio of a particle diameter of the hollow microspheres to a particle diameter of the inorganic particles is 30:1 to 30000:1. In the battery module according to the embodiment, the hollow microspheres may include an organic resin, wherein the inorganic particles include an inorganic material selected from the group consisting of calcium carbonate, silica, calcium sulfate, barium sulfate, talc, talc powder, bentonite, kaolin, chalk powder, graphite, gypsum, electrically conductive carbon black, calcium chloride, iron oxide, aluminum oxide, potassium oxide, dolomite, wollastonite, titanium dioxide, silicate, and mica. In the battery module according to the embodiment, the battery module may include a surface treatment agent coated around the inorganic particles, and the inorganic particles may be attached to the outer surface of the hollow microspheres. In the battery module according to the embodiment, the surface treatment agent may inc