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CN-122000575-A - Battery pack case and method for manufacturing battery pack

CN122000575ACN 122000575 ACN122000575 ACN 122000575ACN-122000575-A

Abstract

The present application relates to a battery pack case and a method for manufacturing a battery pack. A battery can body includes a base plate, a side member that forms an accommodation space together with the base plate and is connected to the base plate, and a cross member that extends in a direction intersecting the side member. The side member includes an inner sidewall facing the accommodating space, and a guide bracket protruding from the inner sidewall toward the accommodating space and forming a guide opening for insertion of the crossing member.

Inventors

  • Pu Zhongkui
  • Jin Guimo
  • JIN SHIYUAN
  • Gao Qiandai

Assignees

  • 现代自动车株式会社
  • 起亚株式会社

Dates

Publication Date
20260508
Application Date
20250710
Priority Date
20241105

Claims (15)

  1. 1. A battery pack case, comprising: a substrate; a side member configured to form an accommodation space together with the substrate and connected to the substrate, and A cross member configured to extend in a direction intersecting the side member; wherein the side member includes: an inner side wall configured to face the accommodation space, and A guide bracket configured to protrude from the inner sidewall toward the accommodation space and form a guide opening for insertion of the cross member.
  2. 2. The battery pack case according to claim 1, wherein the guide bracket includes a pair of bracket walls configured to protrude from the inner side wall toward the receiving space, the guide opening being located between the pair of bracket walls.
  3. 3. The battery pack case according to claim 2, wherein each of the pair of holder walls extends in one direction perpendicular to the base plate, and the guide opening extends in the one direction along the pair of holder walls.
  4. 4. A battery pack case according to claim 3, wherein the cross member is inserted into the guide opening in the one direction.
  5. 5. The battery pack housing of claim 2 wherein the guide bracket further comprises: a connecting wall configured to connect the pair of bracket walls and contact the inner side wall, the connecting wall including an inner connecting surface configured to face the guide opening, and An interference member in contact with the inner connection surface and configured to interfere with the cross member.
  6. 6. The battery pack housing of claim 5 wherein the interference member interferes with the cross member, allowing the cross member to be inserted in one direction toward the guide opening and preventing the cross member from being disengaged from the guide opening in another direction opposite the one direction.
  7. 7. The battery pack case of claim 5, wherein the interference member comprises: A support region in contact with the inner connection surface, and An interference protruding region configured to protrude from the support region toward the guide opening and interfere with the cross member.
  8. 8. The battery pack case of claim 7, wherein the interference protruding region comprises: A protruding region connected to and configured to protrude from the support region, and A cross member contact region configured to extend from the protruding region and be spaced apart from the support region.
  9. 9. The battery pack case according to claim 8, wherein the protruding region has an inclined shape to form a specific angle with one direction of insertion of the cross member into the guide opening and a direction toward the cross member, respectively.
  10. 10. The battery pack housing of claim 7 wherein the cross member comprises: a guide surface disposed in parallel with the support region and in contact with the interference protruding region, and An interference surface configured to protrude from the guide surface toward the support region and interfere with one end of the interference protruding region.
  11. 11. The battery pack housing of claim 3 wherein each of the pair of cradle walls comprises: an inner bracket surface configured to face the guide opening, and An inlet bracket surface configured to extend from the inner bracket surface to have a specific angle with respect to another direction opposite to the one direction, the inlet bracket surface being formed such that a sectional area of the guide opening in a plane perpendicular to the one direction increases along the other direction.
  12. 12. The battery pack housing of claim 3 wherein the guide bracket further comprises a connecting wall configured to connect a pair of bracket walls and contact the inner side wall, Wherein, the connecting wall includes: an inner connection surface configured to face the guide opening; An inlet connection surface configured to extend from the inner connection surface to have a specific angle with respect to another direction opposite to the one direction, the inlet connection surface being formed such that a sectional area of the guide opening on a plane perpendicular to the one direction increases along the other direction.
  13. 13. A method for manufacturing a battery pack, the method comprising: preparing a base plate and a side member configured to collectively form an accommodation space; installing a battery cell stack in the accommodation space; inserting the cross member between the battery cell stacks after the cell mounting step; wherein the side member includes: an inner sidewall configured to face the accommodating space; a guide bracket configured to protrude from the inner sidewall toward the accommodating space to form a guide opening; Wherein inserting the cross member between the battery cell stacks includes inserting the cross member into the guide opening.
  14. 14. The method of claim 13, wherein the guide opening extends in one direction perpendicular to the substrate, and inserting the cross member between the battery cell stacks further comprises inserting the cross member into the guide opening in the one direction.
  15. 15. The method of claim 13, wherein the guide bracket includes an interference member disposed in the guide opening and configured to interfere with the cross member, the inserting the cross member between the battery cell stacks further comprising inserting the cross member into the guide opening until the cross member interferes with the interference member within the guide opening.

Description

Battery pack case and method for manufacturing battery pack Cross Reference to Related Applications The present application claims the benefit of priority from korean patent application No.10-2024-0155654, filed on 5 th 11 of 2024, to the korean intellectual property office, the entire contents of which are incorporated herein by reference. Technical Field The present application relates to a battery pack case and a method for manufacturing a battery pack. Background In recent years, electric Vehicles (EVs) have been accepted for their environmental protection characteristics in the background of increasing global concerns about environmental deterioration and exhaustion of petroleum resources, and research and development of electric vehicles have been significantly paid attention. This increased urgency has driven various classes of advancements associated with electric vehicles, including plug-in hybrid electric vehicles (PHEVs), battery Electric Vehicles (BEVs), and Fuel Cell Electric Vehicles (FCEVs), among others. The transformation to EV technology is expected to reduce greenhouse gas emissions while also potentially meeting the urgent need to break away from fossil fuel dependence and seek sustainable alternatives. In the design of electric vehicles, the electric vehicle is designed with a battery pack housing that provides structural support for a single battery cell, where the battery cell serves as the primary energy source for the propulsion system of the vehicle. In conjunction with this base assembly, ongoing research is directed to increasing the capacity and energy density of these battery cells within the housing to improve the overall performance, range and efficiency of the electric vehicle. In order to increase the capacity of the battery cells, a CTP (cellto pack) structure (the battery cells are directly integrated into the battery pack case, as a unitary battery cell stack, rather than organized in the form of individual modules) may be utilized. This approach enables an increase in energy density and improved thermal management, thereby achieving more efficient electrical performance. Furthermore, integrating the battery cell stack into the battery can may require the introduction of other structural elements (e.g., cross members) that can play an important role in dispersing surface pressure exerted on the battery cell stack during operation. Such structural support is critical to maintaining the integrity and service life of the battery system under various conditions. In view of the above, there is a significant need for improved and simplified structural designs that can facilitate assembly of the cross members while ensuring stability and effectiveness of the cross members in supporting the battery cell stack. This simplified complexity of design may reduce manufacturing costs and improve reliability of the battery system. Furthermore, innovative techniques aimed at optimizing the integration of the cross-members within the battery enclosure can improve overall performance, thereby promoting advances in battery technology. Such improved and simplified structural design should be selected from efficient materials and designs that meet both structural requirements and sustainability criteria in contemporary battery manufacturing. Disclosure of Invention The present application has been made to solve the above-mentioned problems. In embodiments, the present application provides a battery pack case for enabling easy assembly of a cross member and stable support of the cross member. The technical problems to be solved by the present application are not limited to the above-mentioned problems, and any other technical problems not mentioned herein will be clearly understood by those skilled in the art to which the present application pertains from the following description. In an embodiment, the present application provides a battery pack case including a base plate, a side member that forms an accommodation space together with the base plate and is connected with the base plate, and a cross member that extends in a direction crossing the side member. The side member includes an inner sidewall facing the accommodating space, and a guide bracket protruding from the inner sidewall toward the accommodating space and forming a guide opening for insertion of the crossing member. In an embodiment, the guide bracket includes a pair of bracket walls protruding from the inner sidewall toward the receiving space, and the guide opening may be located between the pair of bracket walls. Each of the pair of holder walls may extend in one direction perpendicular to the base plate, and the guide opening may extend in the one direction along the pair of holder walls. The cross member may be inserted into the guide opening in the one direction. In an embodiment, the guide bracket includes a connecting wall connecting a pair of bracket walls and contacting an inner sidewall, the connecting wall including