KR-102965323-B1 - Battery pack and vehicle including the same

Abstract

A battery pack according to one embodiment of the present invention comprises at least one battery module including a plurality of battery cells, a base plate supporting the battery module from below, a pack housing coupled to the base plate and covering the side of the battery module, a first heat sink located at the bottom of the base plate and having a first flow path formed therein for a coolant to flow, and a second heat sink covering the top of the battery module and having a second flow path formed therein for a coolant to flow therein.

Inventors

• 정기택
• 이기환

Assignees

• 주식회사 엘지에너지솔루션

Dates

Publication Date

20260513

Application Date

20240329

Claims (14)

1. At least one battery module comprising a plurality of battery cells; A base plate that supports the above battery module from below; A pack housing that is coupled to the base plate and covers the side of the battery module; A first heat sink located at the bottom of the base plate and having a first flow path formed therein through which a cooling liquid flows; An upper cover comprising a single plate of a metal material that covers the upper part of the battery module and includes a plurality of second flow paths through which a coolant flows; and A fire-resistant sheet attached to the lower surface of the upper cover above; Includes, A battery pack characterized in that a plurality of the above-mentioned second channels are arranged parallel to each other and are formed to penetrate from one end to the other end of the upper cover.
2. In Article 1, A battery pack characterized in that the first heat sink is configured to be bonded to the lower part of the base plate.
3. In Article 1, A battery pack characterized in that the first Euro is configured to be formed in the space between the base plate and the first heat sink.
4. delete
5. delete
6. In Article 1, A battery pack characterized by the above-mentioned second Euro being extruded.
7. In Article 1, The upper cover above is, A second inlet provided at one end of the second Euro and configured to allow the inflow of a cooling liquid; and A battery pack characterized by including a second outlet provided at the other end of the second Euro and configured to allow the coolant to flow out.
8. In Article 1, A battery pack characterized in that the coolant flowing inside the first heat sink and the upper cover is configured to be circulating.
9. delete
10. In Article 1, A battery pack characterized by the above-mentioned fireproof sheet including a fireproof material.
11. In Article 1, A battery pack characterized by the above-mentioned fireproof sheet containing Mica.
12. In Article 1, A battery pack characterized by the above-mentioned fireproof sheet being configured to directly block flames occurring inside the battery pack.
13. In Article 7, A battery pack characterized by including a cooling port assembly configured to be connected to the second inlet and the second outlet.
14. An automobile characterized by including at least one battery pack described in any one of claims 1, 2, 3, 6, 7, 8, 10, 11, 12 and 13.

Description

Battery pack and vehicle including the same The present invention relates to a battery pack and an automobile including the same. Unlike primary batteries, which cannot be recharged, secondary batteries refer to batteries capable of charging and discharging, and are applied not only to portable devices but also to electric vehicles (EVs) and hybrid electric vehicles (HEVs) driven by electric power sources. Currently, widely used types of secondary batteries include lithium-ion batteries, lithium-polymer batteries, nickel-cadmium batteries, nickel-hydrogen batteries, and nickel-zinc batteries. The operating voltage of these unit secondary battery cells, or unit battery cells, is approximately 2.5V to 4.6V. Therefore, if a higher output voltage is required, a battery pack is formed by connecting multiple battery cells in series. Additionally, a battery pack is formed by connecting multiple battery cells in parallel depending on the charge/discharge capacity required for the battery pack. Accordingly, the number of battery cells included in the battery pack can be varied depending on the required output voltage or charge/discharge capacity. When configuring a battery pack by connecting multiple battery cells in series or parallel, it is common practice to first configure a battery module consisting of at least one battery cell, preferably multiple battery cells, and then use at least one such battery module to configure the battery pack by adding other components. Here, a battery module refers to a component in which multiple battery cells are connected in series or parallel, and a battery pack refers to a component in which multiple battery modules are connected in series or parallel to increase capacity and output. Meanwhile, battery packs recently applied to automobiles require the control of the maximum temperature outside the battery pack cover. For example, in the event of thermal runaway, if the battery pack temperature rises too high or flames leak out, it can create a situation where passengers inside the vehicle find it difficult to evacuate, and furthermore, there is a risk of injury. Therefore, even if a thermal event occurs in the battery pack, it is necessary to control the temperature of the battery pack to below a predetermined temperature. The following drawings attached to this specification illustrate preferred embodiments of the present invention and serve to further enhance understanding of the technical concept of the present invention together with the detailed description of the invention provided below; therefore, the present invention should not be interpreted as being limited only to the matters described in such drawings. FIG. 1 is a drawing for illustrating a battery pack according to one embodiment of the present invention. Figure 2 is an exploded perspective view of Figure 1. FIG. 3 is a schematic diagram of a battery pack according to one embodiment of the present invention, viewed from the front. FIG. 4 is a drawing for explaining the structure of a base plate and a first heat sink according to one embodiment of the present invention. FIG. 5 is a drawing for explaining the structure of a second heat sink according to one embodiment of the present invention. FIG. 6 is a drawing for explaining the structure of a second heat sink according to another embodiment of the present invention. FIG. 7 is a drawing for explaining the structure of a second heat sink and a fire-resistant sheet according to one embodiment of the present invention. FIG. 8 is a drawing for explaining the structure of a second heat sink and a fireproof sheet according to another embodiment of the present invention. FIG. 9 is a diagram illustrating the cooling process of a battery pack when a fire occurs inside a battery pack according to one embodiment of the present invention. FIG. 10 is a drawing for illustrating a vehicle including a battery pack according to one embodiment of the present invention. The advantages and features of the present invention and the methods for achieving them will become clear by referring to the embodiments described below in detail together with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below but may be implemented in various different forms. These embodiments are provided merely to ensure that the disclosure of the present invention is complete and to fully inform those skilled in the art of the scope of the invention, and the present invention is defined only by the scope of the claims. Accordingly, in some embodiments, well-known process steps, well-known device structures, and well-known techniques are not specifically described to avoid the present invention being interpreted ambiguously. Throughout the specification, like reference numerals refer to like components. In drawings, thicknesses may be enlarged to clearly represent multiple layers and regions. Throughout the specification, the same reference numerals are