Search

EP-4738571-A1 - BATTERY CASE, AND BATTERY PACK AND VEHICLE COMPRISING SAME

EP4738571A1EP 4738571 A1EP4738571 A1EP 4738571A1EP-4738571-A1

Abstract

A battery case according to the present invention comprises: a pack frame that forms an accommodation space for a plurality of battery cells; a case lead for covering the accommodation space; a gasket interposed between the pack frame and the case lead; and a bracket for covering at least a portion of edge of the case lead, wherein the bracket has a plurality of coupling parts coupled to the case lead by means of a fastening member, adjacent coupling parts of the plurality of coupling parts being spaced a predetermined distance apart from each other.

Inventors

  • KANG, Dahoon

Assignees

  • LG Energy Solution, Ltd.

Dates

Publication Date
20260506
Application Date
20250123

Claims (10)

  1. A battery case comprising: a pack frame configured to form an accommodating space for a plurality of battery cells; a case lid configured to cover the accommodating space; a gasket interposed between the pack frame and the case lid; and a bracket configured to cover at least a portion of an edge of the case lid, wherein the bracket is provided with a plurality of coupling parts coupled to the case lid by a fastening member, and wherein the plurality of coupling parts have coupling parts adjacent to each other that are spaced apart by a predetermined interval.
  2. The battery case of claim 1, wherein the bracket is provided with a bead part of which at least a portion facing the case lid protrudes toward the case lid to be configured to be in contact with the case lid.
  3. The battery case of claim 2, wherein the bead part is disposed at a portion corresponding to a space between the coupling parts adjacent to each other.
  4. The battery case of claim 1, wherein the battery case further comprises a plate-shaped reinforcing member interposed between the case lid and the gasket to correspond to an area between the coupling parts adjacent to each other.
  5. The battery case of claim 1, wherein the bracket includes a first portion configured to cover an upper portion of the case lid and a second portion configured to cover a boundary of the case lid and the gasket.
  6. The battery case of claim 5, wherein the second portion is configured to cover a boundary of the gasket and the pack frame.
  7. The battery case of claim 1, wherein the pack frame is provided with an extension part extended from a part forming the accommodating space and coupled to the case lid.
  8. The battery case of claim 1, wherein the gasket is provided with a protruding part protruding toward at least one of the case lid and the pack frame.
  9. A battery pack comprising the battery case according to any one of claims 1 to 8.
  10. A vehicle comprising the battery pack according to claim 9.

Description

Technical Field The present disclosure relates to a battery case, a battery pack and a vehicle including the same. Background Art As the demand for portable electronic devices such as laptops, video cameras, and portable cell phones has sharply increased, and the commercialization of robots and electronic vehicles is in full swing, research on high-performance rechargeable batteries capable of repetitive charging and discharging is ongoing. Rechargeable batteries commercialized at present include a nickel-cadmium battery, a nickel-metal hydride battery, a nickel-zinc battery, and a lithium rechargeable battery, and among them, since a memory effect, referring to a phenomenon where chargeable capacity of a battery decreases when charging the battery before the battery is completely discharged, rarely occurs in a lithium rechargeable battery compared to a nickel-based rechargeable battery, a lithium rechargeable battery is spotlighted for having advantages of being free to charge and discharge, having a low self-discharge rate, and having high energy density. Such a lithium rechargeable battery mainly uses lithium-based oxide and a carbon material as a positive electrode active material and a negative electrode active material, respectively. A lithium rechargeable battery is provided with an electrode assembly, where a positive electrode plate and a negative electrode plate respectively coated with the positive electrode and negative electrode active materials are disposed with a separator in between, and an external material, in other words, a battery case, sealing and storing the electrode assembly with electrolyte. Generally, a lithium rechargeable battery may be classified, depending on a shape of an external material, as a can-shaped rechargeable battery, where an electrode assembly is built in a metal can, and a pouch-type rechargeable battery, where an electrode assembly is built in a pouch made of an aluminum laminate sheet. Recently, rechargeable batteries are widely used not only for small devices such as a portable electronic device but also for medium and large devices such as an electric vehicle or an energy storage system (ESS) for driving or storing energy. Such rechargeable batteries are electrically connected to each other and stored inside a module case together to compose a battery module, and the battery modules are electrically connected in a compact space to increase energy density to compose a battery pack. A battery pack with high energy density may be vulnerable to accidents such as fire or explosion when structural stability of a battery case is low. Accordingly, the development of a battery case with high structural stability is necessary. Detailed Description of the Invention Technical Goals The present disclosure is designed in consideration of the aforementioned problem and intended to provide a battery case with improved structural stability. Technical solutions A battery pack according to an example embodiment of the present disclosure may include a pack frame configured to form an accommodating space for a plurality of battery cells, a case lid configured to cover the accommodating space, a gasket interposed between the pack frame and the case lid, and a bracket configured to cover at least a portion of an edge of the case lid. The bracket may be provided with a plurality of coupling parts coupled to the case lid by a fastening member. The plurality of coupling parts may have coupling parts adjacent to each other that are spaced apart by a predetermined interval. The bracket may be provided with a bead part of which at least a portion facing the case lid protrudes toward the case lid to be configured to be in contact with the case lid. The bead part may be disposed at a portion corresponding to a space between the coupling parts adjacent to each other. The battery case may further include a plate-shaped reinforcing member interposed between the case lid and the gasket to correspond to an area between the coupling parts adjacent to each other. The bracket may include a first portion configured to cover an upper portion of the case lid and a second portion configured to cover a boundary of the case lid and the gasket. The second portion may be configured to cover a boundary of the gasket and the pack frame. The pack frame may be provided with an extension part extended from a part forming the accommodating space and coupled to the case lid. The gasket may be provided with a protruding part protruding toward at least one of the case lid and the pack frame. A battery pack according to an example embodiment of the present disclosure may include the battery case according to the present disclosure. A vehicle according to an example embodiment of the present disclosure may include the battery pack according to the present disclosure. Effects of the Invention According to an aspect of the present disclosure, it is possible to improve structural stability of a battery case. By includin