KR-20260062565-A - A Coolong Structure composed of cooling Plate

Abstract

The present invention relates to a battery module structure to which a cooling plate is applied, the structure comprising: a battery cell provided by accommodating an electrode assembly in a case including a metal layer and a resin layer and heat-fusing the edge portion of the case; a surface pressure pad applied between battery cells and equipped with shock absorption and heat dissipation functions in response to seismic or external impact applied to the battery cells; a cooling plate provided with an extruded aluminum channel positioned between battery cells, through which cooling water or cooling oil flows into the cooling water flow line of the extruded channel to absorb heat generated from each battery cell; an insulating protection plate formed as a single panel of silicone material, into which a plurality of batteries arranged inside the battery cell are inserted and seated, and which is positioned between battery cells within the upper and lower cases so that heat generated from the battery cells is dissipated, wherein the battery cell and the battery plate are inserted and fixed inside the battery cell case; and a battery plate provided on the outer side of the battery module, to which an insulating protection plate made of silicone material is attached, thereby blocking heat through contact between the battery cell and the insulating protection plate. It is characterized by comprising a front busbar and a rear busbar formed of a thin aluminum plate and formed as a flat surface corresponding to the upper surface of the battery cell when a plurality of battery cells are inserted and mounted between the cooling plates, and which are electrically connected to a plurality of connection terminals on the front and rear sides and fastened with bolts to protect the battery cells on the left and right sides of the cooling plates. Accordingly, the present invention provides the effect of ensuring stable operation of the battery module through heat exchange of each battery cell of the battery cell module by cooling, wherein a cooling plate is installed between each battery cell inside the battery pack, and cooling water or cooling oil is driven to flow into the inlet of the flow line of each cooling plate and flow out through the outlet.

Inventors

• 한광수
• 김지수

Assignees

• 엔브이에이치코리아(주)

Dates

Publication Date

20260507

Application Date

20241029

Claims (2)

1. A battery cell (10) provided by housing an electrode assembly in a case including a metal layer and a resin layer and heat-fusing the edge portion of the case; A surface pressure pad (20) applied between battery cells (10) and equipped with shock absorption and heat dissipation functions according to seismic or external impact applied to the battery cells; A cooling plate (30) equipped with an aluminum extrusion channel and positioned between battery cells (10) and battery cells (10), through which cooling water and cooling oil flow into the flow line (35) of the extrusion channel to absorb heat generated in each battery cell; An insulating protective plate (40) formed as a single panel of silicone material, into which a plurality of batteries arranged inside the battery cell (10) are inserted and seated, and which is positioned between the battery cells inside the upper and lower cases (80, 90) so that heat generated from the battery cells is dissipated, wherein the battery cell (10) and the battery plate (50) are inserted and fixed inside the battery cell case; A battery plate (50) that is provided on the outer side of a battery module and has an insulating protective plate (40) made of silicone attached to it to block heat through contact between the battery cell (10) and the insulating protective plate (40); and A battery module structure having a cooling plate, characterized by comprising: a front bus bar (60) and a rear bus bar (70) formed of a thin aluminum plate, which, when a plurality of battery cells are inserted and mounted between the cooling plates (30), is formed flatly corresponding to the upper surface of the battery cell (10), and has its front and rear sides electrically connected to a plurality of connection terminals and is fastened with bolts to protect the battery cells on the left and right sides of the cooling plate (30).
2. In Article 1, The above cooling plate (30) is It is configured in a plate-like shape and is installed by inserting the battery cell (10), cooling plate (30), and battery cell (10) in that order, and plate-shaped cooling water or cooling oil is introduced into the cooling water inlet (31), and the introduced cooling water or cooling oil moves along the flow line (35) and operates to be discharged through the cooling water outlet (33), thereby absorbing heat transferred through the cooling water or cooling oil moving through the flow path of the flow line (35) and releasing it to the outside through the outlet (33). A battery module structure with a cooling plate applied, characterized in that a plurality of profiles, each equipped with an extruded aluminum channel to position a plurality of battery pack modules at the top, are connected in a male and female manner, and cooling water or cooling oil circulates through the extruded channel to cool the battery cells located on the front and rear sides via fluid in a conduction and convection manner.

Description

Battery module structure with a cooling plate The present invention relates to a battery module structure with a cooling plate applied thereto, and more specifically, to a battery module structure in which a cooling plate is applied thereto, wherein a cooling plate is installed between each battery cell inside a battery pack and the cooling plate is installed between each battery cell and the cooling plate is cooled according to the flow of cooling water or cooling oil flowing into the flow line of each cooling plate, thereby enabling heat exchange of the battery cells in the battery cell module. In addition, the present invention relates to a battery module structure having improved cooling efficiency and capable of simplifying and miniaturizing the battery module structure by applying a cooling plate between battery cells that come into contact with insulating oil or cooling water for cooling, and a cooling structure between battery cells that generate a large amount of heat, through which the cooling plate is introduced and discharged. Generally, a secondary battery refers to a rechargeable battery such as a lithium-ion battery, lithium-polymer battery, nickel-cadmium battery, nickel-hydrogen battery, or nickel-zinc battery. Meanwhile, currently commercialized secondary batteries include nickel-cadmium, nickel-hydrogen, nickel-zinc, and lithium secondary batteries. Among these, lithium secondary batteries are gaining attention for their advantages, such as the ability to freely charge and discharge with almost no memory effect compared to nickel-based secondary batteries, a very low self-discharge rate, and high energy density. These lithium secondary batteries primarily use lithium-based oxides and carbon materials as the positive and negative active materials, respectively. The lithium secondary battery comprises an electrode assembly in which a positive plate and a negative plate, each coated with the positive and negative active materials, are arranged with a separator in between, and an outer casing, namely a battery case, that seals and houses the electrode assembly together with an electrolyte. Generally, lithium secondary batteries can be classified according to the shape of the casing into can-type secondary batteries, in which the electrode assembly is embedded in a metal can, and pouch-type secondary batteries, in which the electrode assembly is embedded in a pouch of aluminum laminate sheet. Recently, secondary batteries are being widely used not only in small devices such as portable electronic devices but also in medium-to-large devices such as automobiles and power storage systems. When used in these medium-to-large devices, a large number of secondary batteries are electrically connected to increase capacity and output. In particular, pouch-type cells are frequently used in these medium-to-large devices due to the advantage of easy stacking. Meanwhile, referring to FIG. 1, a conventional battery module structure is shown. In this conventional battery module structure, when multiple pouch-type cells (1) are stacked using multiple frames (2), cooling efficiency is increased by applying plate-shaped cooling fins (3) on the outer surface of each pair of pouch-type cells (1). Rechargeable batteries may be used in high-temperature environments, such as during the summer, and the batteries themselves can generate heat. In such cases, if multiple rechargeable batteries are stacked, their temperature can rise even further. If this temperature exceeds an appropriate level, the performance of the batteries may deteriorate, and in severe cases, there is a risk of explosion or fire. Therefore, when configuring a battery module, a configuration is frequently used in which cooling fins (3) are applied to contact the surface of a pouch-type cell (1) and these cooling fins (3) are made to contact a cooling plate (4) located below them, thereby preventing the overall temperature of the battery module from rising. However, when a battery module is configured by interposing these cooling fins (3), which are typically made of metal, between facing pouch-type cells (1), the contact thermal resistance due to the difference in material between the surface of the cooling fins (3) and the pouch-type cells (1) is inevitably very high, and there is a problem that it may be difficult to achieve sufficient cooling in situations where a large amount of heat is generated using only a cooling method that relies simply on the conductivity of the metal. Therefore, there is an urgent need to develop battery module structures equipped with cooling methods that reduce such contact thermal resistance and enable more efficient heat dissipation beyond simple heat conduction. Accordingly, the applicant intends to propose a battery module structure that can efficiently reduce the internal heat of the battery generated when using multiple battery packs by using a cooling plate. FIG. 1 is a drawing illustrating the cooling structure