EP-4738591-A1 - BATTERY PACK, PACK LID, AND VEHICLE INCLUDING SAME

Abstract

A battery pack, a pack lid, and a vehicle including same are introduced, the battery pack comprising a pack case; a plurality of battery modules in the pack case facing each other; and a blocking portion protruding from one surface of the pack case toward an inner space of the pack case and formed at a point between the battery modules facing each other to block a propagation of a flame or gas between the battery modules facing each other.

Inventors

• LEE, GI HWAN
• CHO, SEUNG JAE
• LEE, CHUNGHO
• KIM, Jongjin

Assignees

• LG Energy Solution, Ltd.

Dates

Publication Date

20260506

Application Date

20250306

Claims (17)

1. A battery pack comprising: a pack case; a plurality of battery modules in the pack case facing each other; and a blocking portion protruding from one surface of the pack case toward an inner space of the pack case and formed at a point between the battery modules facing each other to block a propagation of a flame or gas between the battery modules facing each other.
2. The battery pack of claim 1, wherein the blocking portion protrudes downward from an upper surface of the pack case or protrudes upward from a lower surface of the pack case.
3. The battery pack of claim 1, wherein a terminal or a busbar is provided in the battery module, and the blocking portion protrudes toward the battery module to cover the terminal or the busbar of the battery module.
4. The battery pack of claim 1, wherein a plurality of the battery modules are disposed to face in a width direction of the pack case, and the blocking portion protrudes to cover end portions of the battery modules facing each other together.
5. The battery pack of claim 1, wherein the battery modules facing in the width direction of the pack case constitute one layer, a plurality of layers are arranged in a longitudinal direction of the pack case, and the blocking portion extends in the longitudinal direction of the pack case to cover the battery modules included in the plurality of layers.
6. The battery pack of claim 1, wherein the pack case includes a case body having one surface opened thereto and a pack lid closing the case body, and the blocking portion is formed so that a portion of the pack lid is recessed inside the pack case.
7. The battery pack of claim 1, wherein a barrier disposed between the battery modules facing each other is provided in the case body, and the blocking portion protrudes toward an end of the barrier to block a propagation of a flame or gas at an end of the barrier.
8. The battery pack of claim 1, wherein a terminal or a busbar is provided at a facing end portion of the battery modules, and the blocking portion covers a terminal or a busbar of the battery modules facing each other.
9. The battery pack of claim 1, wherein a terminal or a busbar is provided at a facing end portion of the battery modules, the terminal or the busbar is protected by a busbar cover, and the blocking portion covers the busbar cover.
10. The battery pack of claim 9, wherein the blocking portion blocks a propagation of a flame or gas between the battery modules facing each other by contacting the busbar cover of the battery modules facing each other.
11. The battery pack of claim 9, wherein a protrusion spaced apart from each other is formed in the blocking portion, and the busbar cover is seated between the protrusions to maintain an assembly position of the blocking portion and the busbar cover.
12. The battery pack of claim 11, wherein the blocking portion includes a contact portion having a planar shape and surface contact with the busbar cover, and a connecting portion extending inclined from both ends of the contact portion to a side opposite the busbar cover and supporting the contact portion.
13. The battery pack of claim 1, wherein the battery modules are disposed in a matrix shape having a plurality of rows and columns, and a barrier is provided between adjacent columns of the battery modules, and the blocking portion covers an end portion of the battery modules facing each other and the barrier together.
14. The battery pack according to claim 13, wherein the end portions of the battery modules included in the same column are connected in series through a first busbar, the last battery modules included in the adjacent columns face each other and are connected in series through a second busbar, and the blocking portion covers the end portions of the battery modules facing each other, the barrier, the first busbar, and the second busbar.
15. The battery pack according to claim 1, wherein the blocking portion is made of the same material as the pack case and is formed together when the pack case is molded.
16. A pack lid comprising a blocking portion which protrudes toward the inner space of a case body at a point between the battery modules facing each other, thereby blocking a propagation of a flame or gas between the battery modules facing each other, wherein the pack lid closes the case body having one side opened.
17. A vehicle comprising the battery pack of claim 1.

Description

[TECHNICAL FIELD] The present disclosure relates to a battery pack and a pack lid having an improved safety of a battery in an abnormal situation and a vehicle including the same. [BACKGROUND ART] Recently, a technology for carbon reduction has been actively developed to solve environmental problems such as abnormal temperature. For carbon reduction, energy needs to be produced by a naturally friendly method rather than by producing energy by fossil fuels, the produced energy is stored in the form of electric energy, and the stored electric energy is used in vehicles or various industrial sites and homes. In order to utilize electric energy for carbon reduction, it is essential to use batteries capable of storing and drawing electric energy. Therefore, in order to sufficiently store and use electric energy without inconvenience, it is essential to secure performance of the battery. The battery mainly uses a redox reaction of metal ions, and metal ions are used at high density to increase capacity, charge and discharge performance, and efficiency of the battery, and many studies on materials or solid electrolytes constituting electrolytes have been conducted. However, generally, there is a problem that the stability deteriorates as the performance of the battery develops. In the case of batteries used in vehicles, industries, homes, and the like, batteries are manufactured in a physical unit such as a pack. The battery pack has a function of preventing a fire from being transferred to the outside even when an accident such as a thermal runaway of the battery occurs, and protecting the internal battery cells such that the internal battery cells are not degraded due to an influence of an external environment or are damaged due to a physical reason. The battery pack has a plurality of battery cells embedded in an intermediate form of a module or a cell module assembly(CMA). In the case of a battery module or assembly, a plurality of battery cells are assembled into one module or assembly, and a plurality of modules are fastened to the inside of a pack case, thereby completing the battery pack. When the battery is maintenance, the maintenance is performed in units of the module or assembly, thereby facilitating maintenance. The plurality of unit battery cells constituting the module or assembly include a positive electrode, a negative electrode, and an electrolyte. Since heat is generated during charge and discharge, effective heat dissipation for battery cells is required. In addition, a design for efficient heat dissipation is necessary to prevent a safety accident even in terms of the battery module or assembly and the battery pack. Meanwhile, the battery may be subjected to deteriorate due to error in manufacturing, excessive charge and discharge, and aging. In addition, when the battery is continuously deteriorated, a fire may eventually occur. Therefore, it is necessary to prepare the battery so as not to generate a fire in advance. To this end, it is important to continuously sense a state of the battery and recognize and respond in advance when a problem occurs, and it is necessary to minimize damage when an unexpected problem occurs. The above-described background descriptions are merely for enhancing an understanding of the background of the present invention, and should not be taken as an admission that the background descriptions are known to those skilled in the art. [DETAILED DESCRIPTION OF INVENTION] [TECHNICAL PROBLEMS] The present invention has been made in view of the above problems, and it is an object of the present invention to provide a battery pack, a pack lid, and a vehicle including the same, which can prevent a fire from propagating to a facing module when a fire occurs in a specific battery module and prevent flames from leaking outwards by preventing an electrical short, thereby improving safety. The technical problems to be achieved by the present invention are not limited to the above-described technical problems, and other technical problems not described herein will be clearly understood by those skilled in the art from the following description. [TECHNICAL SOLUTION] In accordance with another aspect of the present invention, there is provided a battery pack including: a pack case; a plurality of battery modules in the pack case facing each other; and a blocking portion protruding from one surface of the pack case toward an inner space of the pack case and formed at points between facing battery modules to block a propagation of a flame or gas between facing battery modules. In the case of the battery pack according to the present disclosure, the blocking portion may protrude downward from the upper surface of the pack case or upward from the lower surface of the pack case. In the case of the battery pack according to the present disclosure, a terminal or a busbar is provided in the battery module, and the blocking portion may protrude toward the battery module to cover the termin