KR-102964987-B1 - Battery module with accelerated convection

KR102964987B1KR 102964987 B1KR102964987 B1KR 102964987B1KR-102964987-B1

Abstract

The present invention provides a battery module comprising one or more stacked electrode assemblies and a case surrounding at least a portion of the electrode assemblies, wherein the case has at least two facing fluid holes, and among the two or more fluid holes, one fluid hole on one side has a portion whose diameter narrows from the outside to the inside, and the other fluid hole on the other side facing the fluid hole on the one side has a portion whose diameter narrows from the inside to the outside.

Inventors

신재욱
김광중

Assignees

주식회사 엘지에너지솔루션

Dates

Publication Date: 20260513
Application Date: 20211025

Claims (12)

One or more stacked electrode assemblies; A case enclosing at least a portion of the above electrode assembly; In a battery module comprising, The above case is provided with at least two facing fluid holes, and One of the two or more fluid holes above includes a portion whose diameter narrows from the outside to the inside, and A battery module in which the fluid hole on the other side facing the fluid hole on the one side above includes a portion in which the diameter narrows from the inside to the outside.
In paragraph 1, The above case is, An outer case disposed outside the uppermost and lowermost surfaces of the electrode assembly; A side case provided on the side where the electrode tab of the above electrode assembly protrudes; A battery module including
In paragraph 1, The above case is, A cartridge comprising the above electrode assembly; A battery module including
In paragraph 1, The above case is, A heat sink disposed between the above electrode assemblies; Battery module including.
In paragraph 2, The above side case is, A busbar housing that surrounds the side of the electrode tab of the above electrode assembly protruding therefrom; A busbar that electrically connects the electrode tabs of the above electrode assembly; A battery module including
In paragraph 2, A battery module having a fluid hole on one side and a fluid hole on the other side provided in the side case.
In paragraph 6, The above electrode assembly has electrode tabs provided on both the left and right sides, and The above side case has the same shape and is positioned on both the left and right sides of the electrode assembly, and A battery module having a fluid hole on one side and a fluid hole on the other side provided in both of the side cases arranged on the left and right sides.
In paragraph 6, The above electrode assembly has an electrode tab provided on only one side of the left or right side, and A battery module having a fluid hole on one side and a fluid hole on the other side provided only in the side case of the portion where the electrode tab is provided.
In Article 7 or Article 8, A battery module in which fluid introduced through a fluid hole on one side can be discharged through a fluid hole on the other side.
In paragraph 8, A battery module having a baffle added such that fluid introduced through a fluid hole on one side can pass through the interior of the side case in the portion where the electrode tab is not provided and be discharged through a fluid hole on the other side.
In Paragraph 10, The above baffle is a battery module provided between the side case and the stacked surface of the electrode assembly.
In paragraph 4, A battery module in which a fluid hole on one side and a fluid hole on the other side are positioned facing each other with the heat sink as the center.

Description

Battery module with accelerated convection The present invention relates to a battery module in which convection is accelerated. Specifically, it relates to a battery module in which air circulation by convection is accelerated in an ESS system composed of a battery module or a battery pack. Renewable energy sources such as solar, wind, and tidal power are heavily influenced by the natural environment, making it difficult to produce a consistent amount of electricity. Even for power plants capable of controlling production volume, it is difficult to accurately predict electricity demand, so preparations for power surpluses and shortages are necessary. An Energy Storage System (ESS) refers to a storage facility that stores excess electricity and supplies it when needed. By using an ESS, excess electricity can be stored, and power can be supplied stably, thereby minimizing damage caused by power outages. Recently, there has been an increasing trend of miniaturizing large-scale ESS devices for use in buildings, factories, and homes to prepare for power outages or peak demand. An ESS may include battery modules or battery packs containing secondary batteries as power storage devices. The heat generated from battery modules or battery packs directly affects the efficiency and lifespan of the secondary batteries used in the ESS. Since a significant amount of heat is generated during the charging and discharging process of secondary batteries, it is necessary to effectively cool this heat to use the ESS efficiently. As the risk of fire increases if the temperature continues to rise, efficient cooling is essential for safety. FIG. 1 is a perspective view of a battery module (100) according to the prior art, and FIG. 2 is an exploded perspective view of a battery module (100) according to the prior art. The battery module generally has electrode assemblies (10) in the shape of a rectangular parallelepiped stacked horizontally, and an outer case (30) is disposed on the upper and lower surfaces of the stack. Electrode tabs (14) protrude from the left and right sides of the electrode assembly (10). The electrode assembly (10) may be further equipped with electrode tabs (14), a battery case (12) with a portion of the electrode tabs and folded, and optionally a tape (16) for securing the electrode assembly. It includes an outer case (30), side cases (70) provided on both sides where electrode tabs (14) of an electrode assembly (10) protrude, a heat sink (90), and a cartridge (50). The side case (70) is positioned on both sides where the electrode tab (14) protrudes, and includes a busbar housing (72) and a busbar (74) that electrically connects the electrode tab (14) of the electrode assembly (10). The busbar (74) and the electrode tab (14) can be combined in series or in parallel. The outer case (30) and the cartridge (50) can be joined by fitting the coupling protrusions (34, 54) and coupling insertion parts (35, 56) provided on the outer case body (31) and the cartridge body (51), respectively. An electrode assembly (10) and a heat sink (90) are disposed between them. The cartridge (50) and the outer case (30) may additionally have curved parts (38, 58) added to their sides. The heat sink (90) is preferably made of a metal with good thermal conductivity, and aluminum is preferred when considering weight. The heat sink (90) has a protrusion added in a direction parallel to the longitudinal direction of the electrode assembly (10), so that the protruding part contacts the electrode assembly (10), and fluid flows through the non-protruding part. The outer case (30) and cartridge (50) may also have an external coupling part (32, 52) for coupling with the outside. In a battery module (100) according to the prior art, as the side case (70) is assembled, a portion of the side space is blocked or restricted, thereby restricting the flow of fluid to the heat sink (90). Additionally, the welding between the electrode tab (14) and the bus bar (74) substantially acts as an obstacle to the internal fluid flow. As such, the battery module (100) according to the prior art has a problem in that the cooling performance is reduced because the flow of fluid provided to the heat sink (90) is restricted. FIG. 3 is a perspective view of a battery module (100) according to Patent Document 1. The battery module according to Patent Document 1 is configured to include a plurality of stacked battery cells (10) and a module case (20) that accommodates the plurality of battery cells (10). The module case (20) has an air inlet (21), an air outlet (22), and an air circulation path (23) through which the incoming air circulates, so that the battery cells (10) can be cooled through air. The battery module according to Patent Document 1 cools the battery cell (10) through air, and the circulation of air is by a conventional fluid flow, and no configuration to improve this is disclosed. Patent Document 2 relates to an energy storage facility comprising