KR-20260064149-A - BATTERY MODULE AND BATTERY PACK INCLUDING SAME

KR20260064149AKR 20260064149 AKR20260064149 AKR 20260064149AKR-20260064149-A

Abstract

A battery module according to one embodiment of the present invention comprises: a battery cell stack having a plurality of battery cells stacked thereon; a first busbar frame assembly and a second busbar frame assembly respectively disposed on the front and rear surfaces of the battery cell stack and connected to the battery cell stack; and a connecting portion formed on each of the first busbar frame assembly and the second busbar frame assembly to electrically connect the first busbar frame assembly and the second busbar frame assembly, wherein the connecting portion can electrically connect the first busbar frame assembly and the second busbar frame assembly in a wireless manner.

Inventors

신우철

Assignees

주식회사 엘지에너지솔루션

Dates

Publication Date: 20260507
Application Date: 20241031

Claims (12)

A battery cell stack in which multiple battery cells are stacked; A first busbar frame assembly and a second busbar frame assembly respectively disposed on the front and rear surfaces of the battery cell stack and connected to the battery cell stack; and It includes a connecting portion formed on each of the first busbar frame assembly and the second busbar frame assembly to electrically connect the first busbar frame assembly and the second busbar frame assembly, The above connecting part is, A battery module that electrically connects the first busbar frame assembly and the second busbar frame assembly wirelessly.
In paragraph 1, The above connecting part is, A first connecting portion formed in the first busbar frame assembly; and It includes a second connecting portion formed in the second busbar frame assembly, and A battery module in which the first connecting part and the second connecting part transmit and receive signals wirelessly to electrically connect the first busbar frame assembly and the second busbar frame assembly.
In paragraph 2, A battery module in which the first connecting part and the second connecting part are positioned at the same level with respect to the height direction of the battery module and are formed to face each other along the length direction of the battery module.
In paragraph 2, The first connecting part above is, A first main connection unit that transmits and receives signals wirelessly to and from the second connection unit; and A battery module comprising a first sub-connector that transmits and receives signals wirelessly with the second connection when the first main connection does not operate normally.
In paragraph 4, The above second connecting part is, A second main connection unit that transmits and receives signals wirelessly to and from the first connection unit; and A battery module comprising a second sub-connector that transmits and receives signals wirelessly with the first connection when the second main connection does not operate normally.
In paragraph 5, When the first main connection unit and the second main connection unit are operating normally, the first main connection unit and the second main connection unit transmit and receive signals wirelessly, and When the first main connection unit is not functioning normally and the second main connection unit is functioning normally, the first sub connection unit and the second main connection unit transmit and receive signals wirelessly, and When the first main connection unit operates normally and the second main connection unit does not operate normally, the first main connection unit and the second sub-connection unit transmit and receive signals wirelessly, and A battery module in which the first main connection unit and the second main connection unit do not operate normally, and the first sub connection unit and the second sub connection unit transmit and receive signals wirelessly.
In paragraph 5, The first main connection part and the second main connection part are formed to face each other along the length direction of the battery module, positioned at the same level with respect to the height direction of the battery module. A battery module in which the first sub-connector and the second sub-connector are positioned at the same level with respect to the height direction of the battery module and are formed to face each other along the length direction of the battery module.
In paragraph 5, The first main connecting part and the first sub connecting part are formed spaced apart by a predetermined distance along one direction on the same surface of the first busbar frame assembly, and The battery module formed such that the second main connection part and the second sub connection part are spaced apart by a predetermined distance along the one direction on the same surface of the second busbar frame assembly.
In paragraph 1, The above connection portion is a battery module comprising an integrated circuit (IC) formed in each of the first busbar frame assembly and the second busbar frame assembly.
In Paragraph 9, Each of the above-mentioned first busbar frame assembly and the above-mentioned second busbar frame assembly is, Busbar frame; A busbar connecting the plurality of battery cells; and It includes a printed circuit board mounted on the above busbar frame, and The above integrated circuit is a battery module formed by soldering on the above printed circuit board.
In Paragraph 9, The above integrated circuit is a battery module that is an ultra-wideband (UWB) integrated circuit.
Battery module according to claim 1; and A pack case in which the above battery module is packaged inside A battery pack containing

Description

Battery module and battery pack including the same The present invention relates to a battery module and a battery pack including the same, and more specifically, to a battery module in which busbar frame assemblies are wirelessly connected and a battery pack including the same. In modern society, as the use of portable devices such as mobile phones, laptops, camcorders, and digital cameras, as well as energy storage systems (ESS), has become commonplace, the development of technologies in related fields is becoming active. Furthermore, rechargeable secondary batteries are being utilized as power sources for electric vehicles (EVs), hybrid electric vehicles (HEVs), and plug-in hybrid electric vehicles (P-HEVs) as a solution to address air pollution caused by conventional gasoline vehicles using fossil fuels; consequently, the need for the development of secondary batteries is increasing. Currently commercialized rechargeable batteries include nickel-cadmium, nickel-hydrogen, nickel-zinc, and lithium-ion batteries. Among these, lithium-ion batteries are receiving the most attention due to their advantages of free charging and discharging, 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. In the case of secondary batteries used in small devices, 2 to 3 battery cells are arranged, whereas in the case of secondary batteries used in medium to large devices such as automobiles, battery modules in which multiple battery cells are electrically connected are used. In such battery modules, capacity and output are improved by connecting multiple battery cells in series or parallel to form a stack of battery cells. One or more battery modules can be mounted together with various control and protection systems, such as a Battery Management System (BMS), a Battery Disconnect Unit (BDU), and a cooling system, to form a battery pack. A battery pack includes battery modules as a sub-concept, and a battery module includes battery cells as a sub-concept. The number of battery cells in a battery module or the number of battery modules in a battery pack can be determined in various ways depending on the output or capacity of the battery pack required for an electric vehicle or an Energy Storage System (ESS). Meanwhile, the battery module may include a battery cell stack in which a plurality of battery cells are stacked, and a busbar frame assembly disposed on the front and rear surfaces of the battery cell stack and connected to the plurality of battery cells. The busbar frame assemblies disposed on the front and rear surfaces of the battery cell stack may be electrically connected in a wired manner using a physical cable, for example, a flexible flat cable (FFC). In order to connect busbar frame assemblies via a wired method, additional connectors, cables, and connecting processes are required. If errors occur in the connection point, size, or fastening force of each component during the connection process, defects such as the copper (Cu) pattern formed on the printed circuit board of the busbar frame assembly breaking may occur, leading to a problem of reduced product reliability. Therefore, a connection method is needed that can reduce costs and improve product reliability by minimizing the components and processes for electrically connecting busbar frame assemblies. FIG. 1 is a perspective view of a battery module according to one embodiment of the present invention. FIG. 2 is an exploded perspective view of a battery module according to one embodiment of the present invention. FIG. 3 is a drawing showing a wired connection method of a conventional busbar frame assembly as a comparative example to the present invention. FIG. 4 is a diagram showing a wireless connection method of a busbar frame assembly according to one embodiment of the present invention. FIG. 5 is a diagram showing a wireless connection method of a busbar frame assembly according to another embodiment of the present invention. Hereinafter, various embodiments of the present invention will be described in detail with reference to the attached drawings so that those skilled in the art can easily implement the present invention. The present invention may be embodied in various differ