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EP-4589744-B1 - BATTERY MODULE

EP4589744B1EP 4589744 B1EP4589744 B1EP 4589744B1EP-4589744-B1

Inventors

  • Park, Sanghun

Dates

Publication Date
20260513
Application Date
20241101

Claims (15)

  1. A battery module (10) comprising: a first case (100); a second case (200) connected to the first case (100); a first boss (400) on the first case (100), the first boss comprising at least one first rib (420); and a second boss (500) on the second case (200), the second boss comprising at least one second rib (520), wherein the first boss (400) on the first case (100) and the second boss (500) on the second case (200) are at positions corresponding to each other, extend toward each other, are configured to be connected to each other by a fastening member in a configuration in which at least some portion of the first boss and the second boss are in contact with each other, and characterized in that a number of the at least one first rib (420) is different than a number of the at least one second rib (520).
  2. The battery module (10) as claimed in claim 1, wherein the number of the at least one second rib (520) is greater than the number of the at least one first rib (420) on the first case (100).
  3. The battery module (10) as claimed in claim 1 or 2, wherein the first case (100) and the second case (200) each comprise: a plurality of openings accommodating a plurality of battery cells; and a plurality of partition walls defining the plurality of openings, wherein the first boss of the first case (100) and the second boss of the second case (200) are at ends of adjacent partition walls of the plurality of partition walls and are between the plurality of openings.
  4. The battery module (10) as claimed in any of the preceding claims, wherein the at least one first rib (420) extends continuously along a height direction of the first boss and extends parallel to the height direction of the first boss.
  5. The battery module (10) as claimed in any of the preceding claims, wherein an upper surface of the at least one first rib (420) is at a same height as an upper surface of the first boss.
  6. The battery module (10) as claimed in any of claims 3 to 5, wherein the at least one first rib (420) comprises a curved unit extending from an outer circumferential surface of the first boss and spaced inward from an edge of one of the plurality of partition walls, and wherein an end of the one of the plurality of partition walls corresponding to the curved unit is exposed.
  7. The battery module (10) as claimed in claim 6, wherein the curved unit has a curvature direction different from a curvature direction of the outer circumferential surface of the first boss.
  8. The battery module (10) as claimed in any of the preceding claims, wherein the at least one first rib (420) tapers in a height direction of the first boss.
  9. The battery module (10) as claimed in any of the preceding claims, wherein the first boss (400) comprises: a first fastening protrusion (400) on the first case (100), the first fastening protrusion (400) comprising a first body (410) and the at least one first rib (420) on an outer circumferential surface of the first body (410), and wherein the second boss (500) comprises: a second fastening protrusion (500) on the second case (200), the second fastening protrusion (500) comprising a second body (510), the at least one second rib (520) on an outer circumferential surface of the second body (510), and a third rib (530) on the outer circumferential surface of the second body (510) at a different position from the at least one second rib (520).
  10. The battery module (10) as claimed in claim 9, wherein the at least one first rib (420) comprises a plurality of first ribs (420) are on the outer circumferential surface of the first body (410), and wherein the plurality of first ribs (420) are asymmetric with respect to a center of the first body (410).
  11. The battery module (10) as claimed in claim 10, wherein the first case (100) comprises: a plurality of first openings (140) accommodating a plurality of battery cells; a plurality of first partition walls (150) defining the plurality of first openings (140); and a plurality of first grooves (160) between the plurality of first partition walls (150), wherein the first body (410) is at ends of the plurality of first partition walls (150), and wherein the plurality of first ribs (420) do not overlap the plurality of first grooves (160).
  12. The battery module (10) as claimed in any of claims 9 to 11, wherein the at least one second rib (520) comprises a plurality of second ribs (520) on the outer circumferential surface of the second body (510), and wherein the plurality of second ribs (520) are asymmetric with respect to a center of the second body (510).
  13. The battery module (10) as claimed in claim 12, wherein the second case (200) comprises: a plurality of second openings (240) accommodating a plurality of battery cells; a plurality of second partition walls (250) defining the plurality of second openings (240); and a second groove (260) between the plurality of second partition walls (250), wherein the second body (510) is at ends of the plurality of second partition walls (250), wherein the plurality of second ribs (520) do not overlap the second groove (260), and wherein at least a portion of the third rib (530) is in the second groove (260).
  14. The battery module (10) as claimed in any of claims 9 to 13, wherein the at least one second rib (520) and the third rib (530) are arranged at an equal angle in a circumferential direction of the second body (510).
  15. The battery module (10) as claimed in any of claims 9 to 14, wherein the third rib (530) has a length less than a length of each of the at least one second rib (520).

Description

BACKGROUND 1. Field One or more embodiments relate to a battery module. 2. Description of the Related Art Secondary batteries are chargeable and dischargeable and may be used as energy sources for mobile devices, electric vehicles, hybrid vehicles, electric bicycles, and uninterruptible power supplies. Depending on the type of an external device to which a secondary battery is applied, the secondary batteries may be used in the form of a single battery cell or in the form of a module or pack in which multiple battery cells are connected and bundled into one unit. The information disclosed in the background technology of the disclosure is only to facilitate understanding of the background of the disclosure, and therefore may include information that does not constitute prior art. Conventional battery modules are disclosed in CN210015886U and DE102021106470A1. SUMMARY One or more embodiments include a battery module having high rigidity and durability configured to withstand a torque applied to a case by a fastening member when fastening the case with the fastening member. However, the technical problem to be solved by the present disclosure is not limited to the above-mentioned problem, and other problems not mentioned may be clearly understood by those skilled in the art from the description of the disclosure described below. Additional aspects will be set forth in part in the description which follows and, in part, will be apparent from the description, or may be learned by practice of the presented embodiments of the present disclosure. According to the present invention, a battery module includes a first case, a second case connected on top of the first case, and a boss formed on each of the first case and the second case and including a rib on an outer surface, wherein the boss formed in the first case and the boss formed in the second case are formed at positions corresponding to each other, extend toward each other, are connected to each other by a fastening member in a state that at least some parts are in contact with each other, and include different number of bosses. The boss formed in the second case may include a greater number of ribs than the boss formed in the first case. The first case and the second case may include an opening into which a battery cell is inserted and a partition wall defining the opening. The rib may be formed continuously throughout a height direction of the boss and extends parallel to the height direction of the boss. An upper surface of the rib may be the same height as an upper surface of the boss. The rib may include a curved unit curvedly extending from an outer circumferential surface of the boss and spaced inward from an edge of the partition wall, The curved unit may have a sign of curvature different from that of the outer circumferential surface of the boss. The rib may have a shape tapered upward in the height direction of the boss. The boss may include a first fastening protrusion formed on the first case and a second fastening protrusion formed on the second case, wherein the first fastening protrusion may include a first body and a first rib formed on the outer circumferential surface of the first body. A plurality of first ribs may be formed on the outer circumferential surface of the first body, and the plurality of first ribs may be arranged asymmetrically with respect to the center of the first body. The first case may include a first opening into which a battery cell is inserted, a first partition wall defining the first opening, and a first groove formed between the plurality of first partition walls. A plurality of second ribs may be formed on the outer circumferential surface of the second body, and the plurality of second ribs may be arranged asymmetrically with respect to the center of the second body. The second case may include a second opening into which the battery cell is inserted, a second partition wall defining the second opening, and a second groove formed between the plurality of second partition walls. The second rib and the third rib may be arranged at an equal angle in the circumferential direction of the second body. The third rib may have a length less than that of the second rib. BRIEF DESCRIPTION OF THE DRAWINGS The above and other aspects, features, and advantages of certain embodiments of the present disclosure will be more apparent from the following description taken in conjunction with the accompanying drawings, in which: FIG. 1 is a diagram of a battery module according to an embodiment;FIG. 2 is an exploded view of the battery module;FIG. 3 is a diagram of a first case;FIG. 4 is a diagram showing an enlarged portion IV of FIG. 3;FIG. 5 is a plan view of FIG. 4;FIG. 6 is a diagram showing an enlarged view of a first fastening protrusion;FIG. 7 is a diagram showing a second case;FIG. 8 is a diagram showing an enlarged view of a portion VII of FIG. 7;FIG. 9 is a plan view of FIG. 8;FIG. 10 is a diagram showing an enlarged view