CN-122025971-A - Battery module and battery pack including the same

Abstract

The invention provides a battery module and a battery pack including the same. The battery module according to the exemplary embodiment of the present invention includes a battery cell stack including one or more battery cells, and a module frame for receiving the battery cell stack, wherein the module frame includes a pattern structure in at least one surface, a plurality of holes are formed in the pattern structure in a repeating shape, and the pattern structure is a truss structure in which the holes are triangular in shape.

Inventors

• LI ZHENGXUN
• CHENG ZHUNYE
• ZHENG HUIMEI
• JIN GUANGMO
• Bian Duorong

Assignees

• 株式会社LG新能源

Dates

Publication Date

20260512

Application Date

20211014

Priority Date

20201015

Claims (10)

1. 1. A battery module, the battery module comprising: a cell stack including one or more cells, and A module frame for accommodating the battery cell stack, Wherein the module frame includes a pattern structure in which a plurality of holes are formed in a repeating shape in at least one surface, and the pattern structure is a truss structure in which the holes are triangular in shape.
2. 2. The battery module of claim 1, wherein: the module frame is made of metal.
3. 3. The battery module of claim 1, wherein the battery module further comprises: a pair of end plates provided at both ends in the longitudinal direction of the battery cell stack, Wherein the module frame is formed corresponding to four surfaces of the battery cell stack that are not covered by the pair of end plates, and The pattern structure is not disposed on a surface corresponding to a bottom surface of the battery cell stack among the four surfaces.
4. 4. The battery module of claim 3, wherein: The pattern structure is disposed on one surface of the module frame corresponding to the upper surface of the cell stack.
5. 5. The battery module of claim 4, wherein: the pattern structure is disposed on the entirety of the one surface of the module frame corresponding to the upper surface of the battery cell stack.
6. 6. The battery module of claim 4, wherein: the pattern structure is provided only on a portion of the one surface of the module frame corresponding to the upper surface of the battery cell stack.
7. 7. The battery module of claim 3, wherein: The pattern structure is disposed on one surface of the module frame corresponding to either side surface of the cell stack.
8. 8. The battery module of claim 1, wherein the battery module further comprises a fire extinguishing agent sheet disposed between the pattern structure and the cell stack, Wherein the fire extinguishing agent sheet includes one or more selected from inorganic carbonates, inorganic phosphates, and inorganic sulfates.
9. 9. The battery module of claim 8, wherein: The fire extinguishing agent sheet prevents foreign matter from being introduced from the outside through the holes of the pattern structure.
10. 10. A battery pack, the battery pack comprising: at least one battery module according to any one of claims 1 to 9, and A battery pack housing configured to encapsulate the at least one battery module.

Description

Battery module and battery pack including the same The present application is a divisional application of patent application of the application (application date is 2021, 10 and 14, application number is 202111198472.9, and the application name is "battery module and battery pack including the battery module") of LG new energy source of the corporation. Technical Field The present invention relates to a battery module and a battery pack including the same, and more particularly, to a battery module capable of simultaneously improving safety of the battery module and maintaining rigidity of the battery module, and a battery pack including the same. Background In modern society, as the use of portable devices such as mobile phones, notebook computers, camcorders and digital cameras has become widespread, the development of technologies related to mobile devices has become active. In addition, the rechargeable secondary battery is a measure to solve air pollution of existing gasoline vehicles using fossil fuel, and is used as a power source for Electric Vehicles (EV), hybrid Electric Vehicles (HEV), plug-in hybrid electric vehicles (P-HEV), etc., so that the demand for development of the secondary battery is increased. The secondary batteries commercialized at present include nickel-cadmium batteries, nickel-hydrogen batteries, nickel-zinc batteries, lithium secondary batteries, and the like, in which lithium secondary batteries have advantages in that charging and discharging are free, self-discharge rate is very low, and energy density is very high due to a small memory effect, as compared with nickel-based secondary batteries. Lithium secondary batteries mainly use lithium-based oxides and carbon materials as a positive electrode active material and a negative electrode active material, respectively. The lithium secondary battery includes an electrode assembly in which positive and negative electrode plates to which positive and negative electrode active materials are applied, respectively, are disposed with a separator interposed therebetween, and an external material, i.e., a battery case, which seals and accommodates the electrode assembly together with an electrolyte. Generally, lithium secondary batteries can be classified into can-type secondary batteries, in which an electrode assembly is embedded in a metal can, and pouch-type secondary batteries, in which an electrode assembly is embedded in a pouch of an aluminum laminate sheet, according to the shape of an external material. In the case of a secondary battery for small-sized devices, two or three battery cells are provided, but in the case of a secondary battery for medium-and large-sized devices (e.g., automobiles), a battery module in which a plurality of battery cells are electrically connected is used. The plurality of battery cells are connected in series or parallel with each other to form a battery assembly such that the battery module has improved capacity and output. In addition, one or more battery modules may be mounted together with various control and protection systems such as a Battery Management System (BMS) and a cooling system to form a battery pack. In the case of configuring a battery pack by connecting a plurality of battery cells in series/parallel, it is a general method to first configure a battery module formed of at least one battery cell and to configure the battery pack by adding other constituent elements using at least one battery module. The number of battery modules included in the battery pack or the number of battery cells included in the battery modules may be differently set according to desired output voltages or charge/discharge capacities. Since it is desirable that the middle-and large-sized battery modules are manufactured in a lightweight and thin structure, prismatic batteries, pouch-shaped batteries, etc., which can be stacked with high integration and have a small weight to capacity ratio, are mainly used as the battery cells of the middle-and large-sized battery modules. Meanwhile, in order to protect the battery cell stack from external impact, heat or vibration, the battery module may include a frame member that accommodates the battery cell stack in the inner space while covering the upper surface, the bottom surface, the left surface, and the right surface of the battery cell stack. Since a plurality of battery cells included inside the battery module have a stacked structure, a vent structure may be applied to rapidly discharge heat and flame to the outside when ignition occurs in the battery module cells. However, in this case, there is a problem in that foreign materials flow into the vent hole, and the rigidity of the battery module is lowered due to the use of the vent hole. The above information disclosed in this background section is only for enhancement of understanding of the background of the invention and therefore it may contain information that does not form the prior art that is alre