KR-20260062187-A - Heat-dissipating combined lithium secondary battery module

KR20260062187AKR 20260062187 AKR20260062187 AKR 20260062187AKR-20260062187-A

Abstract

The heat-dissipating combination lithium secondary battery module (90) according to the present invention is configured as follows. It includes a plurality of cylindrical battery cells (100), a rectangular upper cover (200) and a lower cover (300) formed to be mutually combined in the front, rear, and side directions, with the upper and lower ends of the battery cells (100) respectively fitted thereto, and a heat pump (400) mounted on the outer surface of the upper cover (200) and lower cover (300) that are positioned at the outermost edge in a combined state, and mounted on the upper cover (200) and lower cover (300) that correspond to the upper and lower ends, to discharge heat radiated from the battery cells (100) to the outside. Therefore, the following effects are achieved. Unlike the background technology, the structure is not one in which the battery cell is housed in a housing, but rather one in which the combined upper cover (200) and lower cover (300) are bound together in a grid shape, and since they are exposed in all directions, heat dissipation is effective. In particular, since the battery cell (100) is inserted into the openings (203, 303) of the upper cover (200) and lower cover (300) and is spaced apart at a certain distance, the smooth inflow of external air is possible, thereby enabling effective heat dissipation. In addition, it is possible to manufacture battery modules of various sizes depending on the number of upper covers (200) and lower covers (300) combined without manufacturing a separate housing. That is, since the number of battery cells (100) that can be accommodated can be freely adjusted, there is an effect of easily manufacturing battery modules of various outputs.

Inventors

정혜경
김성진
홍희동
박범석
이재순

Assignees

대구대학교 산학협력단
주식회사 에스엠벡셀

Dates

Publication Date: 20260507
Application Date: 20241025

Claims (5)

A number of cylindrical battery cells, and A rectangular upper cover and a lower cover formed to be mutually combined in the front, rear, and side directions, wherein the upper and lower ends of the battery cell are respectively fitted thereto, and A heat-dissipating combination lithium secondary battery module characterized by including a heat pump mounted on the outer surface of the outermost one positioned in a combined state of the upper cover and lower cover, which is mounted on the upper and lower corresponding upper cover and lower cover to discharge heat dissipated from the battery cell to the outside.
In paragraph 1, The above upper cover and lower cover are of the same shape, A flat block-shaped body, and An opening formed in a circular shape on the side of the body corresponding to the top or bottom of the battery cell, into which the top or bottom of the battery cell is fitted, and A hole perforated in the body in a vertical direction from the above opening, exposing the positive or negative electrode of the battery cell, and, On two first sides connected in a right-angle direction among the four side surfaces of the body, a key-shaped projection formed vertically and elongated, and Two second sides connected in a right-angle direction corresponding to the first side, each having an insertion groove formed to correspond to the projection and to allow the projection to be fitted and pass through in an upward and downward direction. A heat-dissipating combination lithium secondary battery module characterized by the fact that the above-mentioned protrusion has a shape that extends outward, and the above-mentioned insertion groove is also formed to correspond to the above-mentioned protrusion, thereby preventing lateral displacement of the above-mentioned protrusion.
In paragraph 2, The above heat pump is, A heat absorption plate inserted in an upright position between the above battery cells, and A cooling plate positioned between the upper cover and the lower cover, connected to the end of the heat absorption plate, positioned at the outermost edge, with a protrusion facing outward, and A mounting plate having an insertion groove formed on its inner surface to allow the protrusions of the upper cover and lower cover disposed on the upper and lower parts of the cooling plate to be fitted, and an opening formed to expose the cooling plate, and A thermoelectric element in which a cooling surface is in close contact with the cooling plate through the above-mentioned opening, and A heat dissipation block having a plurality of heat dissipation fins formed outwardly and in close contact with the heat dissipation surface of the thermoelectric element, and A fan in close contact with the end of the heat dissipation fin, and A heat-dissipating combined lithium secondary battery module characterized by including an elastic band connected to both sides of the opening in the mounting plate, which accommodates the thermoelectric element, heat dissipation block, and fan and compresses them toward the cooling plate.
In paragraph 3, The above heat absorption plate and cooling plate have internal spaces formed therein and said spaces are connected to each other, and A heat-dissipating combination lithium secondary battery module characterized by having a liquid refrigerant filled inside the above space.
In paragraph 4, A combination type lithium secondary battery module capable of heat dissipation, characterized by including a plurality of heat-absorbing wires made of a metal material with excellent thermal conductivity, which are connected to the outer surface of the heat-absorbing plate.

Description

Heat-dissipating combined lithium secondary battery module The present invention relates to a combination type lithium secondary battery module capable of heat dissipation, and more specifically, to a combination type lithium secondary battery module capable of heat dissipation characterized by being configured such that a plurality of battery cells can be combined into a battery module of a desired size and heat generated from the battery cells can be easily discharged to the outside by a heat pump. This project (result) is the result of the Local Government-University Cooperation-based Regional Innovation Project, conducted in 2024 with funding from the Ministry of Education and support from the National Research Foundation of Korea (2022RIS-006). (This research was supported by "Regional Innovation Strategy(RIS)" through the National Research Foundation of Korea(NRF) funded by the Ministry of Education(MOE)(2022RIS-006) FIG. 1 is a perspective view illustrating a cylindrical battery cell that generally constitutes a lithium secondary battery module. The configuration and problems of the lithium secondary battery module according to the background technology are as follows. In addition to rechargeability, lithium-ion battery modules are widely used as batteries for electric vehicles due to their ability to be miniaturized and have high capacity, as well as their advantages of a higher operating voltage and higher energy density per unit weight compared to other batteries. This lithium secondary battery module comprises multiple cylindrical battery cells, as illustrated in FIG. 1, electrically connected and housed in a rectangular box-shaped housing. The housing is configured to supply electrical energy to the outside by having positive and negative terminals connected to multiple battery cells. Multiple such lithium secondary battery modules are electrically connected and used as an energy source to support means of transportation, machinery, or devices requiring high-capacity output, such as electric vehicles. However, the aforementioned lithium secondary battery module had the inconvenience of requiring separate housings to be manufactured for high and low capacities. In other words, there was a problem in that housings classified into various sizes according to charging and discharging capacities had to be produced by injection molding using separate molds. Furthermore, the aforementioned lithium secondary battery module generates heat during discharge. If this heat generation persists, not only is the charge-discharge efficiency reduced and the lifespan of the battery cells shortened, but there is also a serious problem of explosion and fire. The frequent news reports regarding electric vehicle fire incidents in recent times clearly illustrate this problem. FIG. 1 is a perspective view illustrating a cylindrical battery cell that generally constitutes a lithium secondary battery module. FIG. 2 is a perspective view illustrating a combination type lithium secondary battery module capable of heat dissipation according to the present invention. FIG. 3 is a perspective view illustrating the process of fitting the upper and lower parts of a battery cell into the upper cover and the lower cover in a heat-dissipating combination type lithium secondary battery module according to the present invention. FIG. 4 is a perspective view illustrating the state in which the upper and lower parts of a battery cell are fitted into the upper cover and the lower cover, respectively, through the process of FIG. 3. FIG. 5 is a perspective view illustrating the process of the upper cover illustrated in FIG. 3 being combined with each other in the front and rear directions. FIG. 6 is a perspective view illustrating the state in which the upper cover is combined with the front and rear through the process of FIG. 5. FIG. 7 is a perspective view illustrating the process of the upper cover illustrated in FIG. 3 being combined laterally. FIG. 8 is a perspective view illustrating the mutually combined state in which the upper cover is laterally combined through the process of FIG. 7. FIG. 9 is a perspective view illustrating the process of inserting a heat-conducting part of a heat pump between battery cells in a heat-dissipating combination type lithium secondary battery module according to the present invention. FIG. 10 is a cross-sectional view showing the cross section taken along plane A in FIG. 9 as seen from the direction F. FIG. 11 is a cross-sectional view illustrating another embodiment of the present invention in which a plurality of heat-absorbing wires are attached to both sides of the heat-absorbing plate of the heat conduction part in FIG. 10. FIG. 12 is a perspective view illustrating the state in which a heat conduction part is inserted between battery cells through the process of FIG. 9. FIG. 13 is a perspective view illustrating the process in which a mounting plate is mounted on an upper cover and a lower cove