KR-20260066030-A - Battery pack case, and Battery pack having the same

Abstract

The present disclosure relates to a battery pack case and a battery pack including the same, and more specifically, to a battery pack case and a battery pack including the same that can prevent heat propagation from a trigger module to a normal module by providing a flow path through which gases, etc. generated during a thermal runaway situation can flow inside the frames constituting the battery pack case and discharging the gases, etc. to the outside through the flow path.

Inventors

• 강민송
• 구본석
• 박병준
• 정준희
• 조세훈
• 한진수
• 황재일

Assignees

• 에스케이온 주식회사

Dates

Publication Date

20260512

Application Date

20260428

Claims (7)

1. A plate on which battery modules are placed; An outer frame formed at a predetermined height on the outer edge of the above plate; and It includes a partition frame that divides the internal space formed by the plate and the outer frame into a plurality of module spaces, A fluid-flowing channel is provided inside at least one of the outer frame or the partition frame, and The above Euro includes mutually separated first Euro and second Euro, and The above plurality of module spaces includes mutually adjacent first module space and second module space, and A battery pack in which the first module space is in communication with the first fluid path, and the second module space is in communication with the second fluid path.
2. In Article 1, The above outer frame includes a side beam that is positioned on each side in the left and right directions of the plate and has a side beam flow path formed inside, and The above-mentioned side beam Euro is a battery pack in which at least one of the end and the other end is in communication with the outside.
3. In Paragraph 2, The above partition frame is A cross beam arranged in the left-right direction on the above plate and having a cross beam channel formed inside; A front beam positioned at the front on the above plate, having a front beam flow path formed therein; and It includes a rare beam positioned at the rear on the above plate and having a rare beam flow path formed inside, The above crossbeam channel is interconnected with the above sidebeam channel, and The above front beam Euro and the above rear beam Euro are each interconnected with the above side beam Euro, battery pack
4. In Article 1, The above fluid includes gases, etc. generated during a thermal runaway situation of the battery modules, and A battery pack in which the Euro of the outer frame and the Euro of the partition frame are interconnected.
5. In Article 1, The above partition frame includes a center beam arranged in the front-rear direction on the plate, and A center beam flow path is formed inside the center beam, and The above-mentioned center beam Euro is a battery pack in which at least one of the end and the other end is in communication with the outside.
6. In Article 1, A plurality of module space covers provided on the upper portion of each of the plurality of module spaces to shield each of the module spaces; and A battery pack further comprising a battery pack cover that is the upper part of the plurality of module space covers and completely shields the battery pack case.
7. In Paragraph 6, It further includes battery modules individually mounted in each of the plurality of module spaces, and The above battery module comprises a battery cell assembly made of pouch-type battery cells and a module case for fixing the battery cell assembly, wherein A battery pack in which the above pouch-type battery cell is directly seated on the plate through a thermal conductive member.

Description

Battery pack case, and battery pack having the same The present invention relates to a battery pack case and a battery pack including the same. More specifically, the invention relates to a battery pack case and a battery pack including the same, which can prevent heat propagation from a trigger module to a normal module by providing a flow path through which gases, etc., generated during a thermal runaway situation can flow inside the frames constituting the battery pack case and discharging the gases, etc., to the outside through the flow path. Secondary batteries, which possess electrical characteristics such as high energy density and high applicability across product groups, are widely applied not only to portable devices but also to electric vehicles (EVs) or hybrid electric vehicles (HEVs) powered by electric sources. These secondary batteries are attracting attention as a new energy source for enhancing eco-friendliness and energy efficiency, not only for the primary advantage of drastically reducing the use of fossil fuels but also because they generate no by-products from energy use. 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, multiple battery cells are connected in series to form a battery pack. Additionally, depending on the charge/discharge capacity required for the battery pack, multiple battery cells are connected in parallel to form a battery pack. Accordingly, the number of battery cells included in the battery pack can be set in various ways depending on the required output voltage or charge/discharge capacity. Meanwhile, 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, and then use this at least one battery module to add other components to form the battery pack. Here, the battery cells constituting the battery module or the battery pack can generally be provided as pouch-type secondary batteries, which have the advantage of being easily stackable on top of each other. In the case of a battery module, a thermal runaway situation may occur where a battery cell ignites inside the case due to overcharging or other factors. At this time, high-temperature, high-pressure gas, flames, and metal particles may be generated from the trigger cell or the trigger module containing it. If flames generated from the trigger module are exposed outside the case, it can lead to greater secondary damage. Furthermore, if high-temperature, high-pressure gas cannot escape from the case, there is a risk that the increased internal pressure of the case could lead to the explosion of the battery module. To address this, conventionally, a venting valve or the like was provided in a certain area of the battery pack case to discharge gases generated from the trigger module to the outside of the pack when an issue occurs. However, according to the structure of such conventional pack cases, since the venting valve is used commonly throughout the entire internal space of the pack case, hazardous substances generated from the trigger module can only be discharged to the outside through the venting valve after spreading throughout the entire interior of the pack, which causes a problem of adversely affecting other normal modules instead of the trigger module. FIG. 1 is a schematic perspective view of a battery pack case according to one example of the present disclosure. Figure 2 schematically shows Figure 1 viewed from above. FIG. 3 shows a battery pack case according to one example of the present disclosure. FIG. 4 shows a battery pack case according to another example of the present disclosure. FIG. 5 shows a battery pack case according to another example of the present disclosure. Figure 6 is an enlarged view of area A of Figure 1, and Figure 7 is an exploded perspective view of Figure 6. Figure 8 is an enlarged view of area B of Figure 1, and Figure 9 is an exploded view of Figure 8. Figure 10 conceptually illustrates the connection relationship between the module space and the center beam unit flow path. FIG. 11 is a drawing showing a center beam unit channel, a communication hole, and a guide member. Figure 12 is an exploded view of a case showing each center beam unit flow path layer by layer. FIG. 13 is a battery pack and an exploded view thereof according to one example of the present disclosure. FIG. 14 shows a battery module according to one example of the present disclosure. Hereinafter, the present disclosure will be described with reference to the attached drawings. FIG. 1 is a schematic perspective view of a battery pack case according to an example of the pres